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cooperative</title> <meta name="description" content="Search results for: agricultural cooperative"> <meta name="keywords" content="agricultural cooperative"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="agricultural cooperative"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 2315</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: agricultural cooperative</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2285</span> Cooperative Sensing for Wireless Sensor Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julien%20Romieux">Julien Romieux</a>, <a href="https://publications.waset.org/abstracts/search?q=Fabio%20Verdicchio"> Fabio Verdicchio</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wireless Sensor Networks (WSNs), which sense environmental data with battery-powered nodes, require multi-hop communication. This power-demanding task adds an extra workload that is unfairly distributed across the network. As a result, nodes run out of battery at different times: this requires an impractical individual node maintenance scheme. Therefore we investigate a new Cooperative Sensing approach that extends the WSN operational life and allows a more practical network maintenance scheme (where all nodes deplete their batteries almost at the same time). We propose a novel cooperative algorithm that derives a piecewise representation of the sensed signal while controlling approximation accuracy. Simulations show that our algorithm increases WSN operational life and spreads communication workload evenly. Results convey a counterintuitive conclusion: distributing workload fairly amongst nodes may not decrease the network power consumption and yet extend the WSN operational life. This is achieved as our cooperative approach decreases the workload of the most burdened cluster in the network. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20signal%20processing" title="cooperative signal processing">cooperative signal processing</a>, <a href="https://publications.waset.org/abstracts/search?q=signal%20representation%20and%20approximation" title=" signal representation and approximation"> signal representation and approximation</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20management" title=" power management"> power management</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20sensor%20networks" title=" wireless sensor networks"> wireless sensor networks</a> </p> <a href="https://publications.waset.org/abstracts/36781/cooperative-sensing-for-wireless-sensor-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36781.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">390</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2284</span> Undergraduates' Development of Interpersonal and Cooperative Competence in Service-Learning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Huixuan%20Xu">Huixuan Xu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study was set out to investigate the extent to which and how service-learning fostered a sample of 138 Hong Kong undergraduates’ interpersonal competence and cooperative orientation development. Interpersonal competence is presented when an individual shows empathy with others, provides intelligent advice to others and has practical judgment. Cooperative orientation reflects individuals’ willingness to work with others to achieve common goals. A quality service-learning programme may exhibit the features of provision of meaningful service, close link to curriculum, continuous reflection, youth voice, and diversity. Mixed methods were employed in the present study. Pre-posttest survey was administered to capture individual undergraduates’ development of interpersonal competence and cooperative orientation over a period of four months. The respondents’ evaluation of service-learning elements was administered in the post-test survey. Focus groups were conducted after the end of the service-learning to further explore how the certain service-learning elements promoted individual undergraduates’ development of interpersonal competence and cooperative orientation. Three main findings were reported from the study. (1) The scores of interpersonal competence increased significantly from the pretest to the posttest, while the change of cooperative orientation was not significant. (2) Cooperative orientation and interpersonal competence were correlated positively with the overall course quality respectively, which suggested that the more a service-learning course complied with quality practice, the students became more competent in interpersonal competence and cooperative orientation. (3) The following service-learning elements showed higher impacts: (a) direct contact with service recipients, which engaged students in practicing interpersonal skills; (b) individual participants’ being exposed to a situation that required communication and dialogue with people from diverse backgrounds with different views; (c) experiencing interpersonal conflicts among team members and having the conflicts solved; (d) students’ taking a leading role in a project-based service. The present study provides compelling evidence about what elements in a service-learning program may foster undergraduates’ development of cooperative orientation and interpersonal competence. Implications for the design of service-learning programmes are provided. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=undergraduates" title="undergraduates">undergraduates</a>, <a href="https://publications.waset.org/abstracts/search?q=interpersonal%20competence" title=" interpersonal competence"> interpersonal competence</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperation%20orientation" title=" cooperation orientation"> cooperation orientation</a>, <a href="https://publications.waset.org/abstracts/search?q=service-learning" title=" service-learning"> service-learning</a> </p> <a href="https://publications.waset.org/abstracts/78937/undergraduates-development-of-interpersonal-and-cooperative-competence-in-service-learning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78937.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">256</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2283</span> Disturbance Observer for Lateral Trajectory Tracking Control for Autonomous and Cooperative Driving</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christian%20Rathgeber">Christian Rathgeber</a>, <a href="https://publications.waset.org/abstracts/search?q=Franz%20Winkler"> Franz Winkler</a>, <a href="https://publications.waset.org/abstracts/search?q=Dirk%20Odenthal"> Dirk Odenthal</a>, <a href="https://publications.waset.org/abstracts/search?q=Steffen%20M%C3%BCller"> Steffen Müller</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this contribution a structure for high level lateral vehicle tracking control based on the disturbance observer is presented. The structure is characterized by stationary compensating side forces disturbances and guaranteeing a cooperative behavior at the same time. Driver inputs are not compensated by the disturbance observer. Moreover the structure is especially useful as it robustly stabilizes the vehicle. Therefore the parameters are selected using the Parameter Space Approach. The implemented algorithms are tested in real world scenarios. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=disturbance%20observer" title="disturbance observer">disturbance observer</a>, <a href="https://publications.waset.org/abstracts/search?q=trajectory%20tracking" title=" trajectory tracking"> trajectory tracking</a>, <a href="https://publications.waset.org/abstracts/search?q=robust%20control" title=" robust control"> robust control</a>, <a href="https://publications.waset.org/abstracts/search?q=autonomous%20driving" title=" autonomous driving"> autonomous driving</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20driving" title=" cooperative driving"> cooperative driving</a> </p> <a href="https://publications.waset.org/abstracts/22619/disturbance-observer-for-lateral-trajectory-tracking-control-for-autonomous-and-cooperative-driving" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22619.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">564</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2282</span> Efficient Single Relay Selection Scheme for Cooperative Communication</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sung-Bok%20Choi">Sung-Bok Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyun-Jun%20Shin"> Hyun-Jun Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyoung-Kyu%20Song"> Hyoung-Kyu Song</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a single relay selection scheme in cooperative communication. Decode and forward scheme is considered when a source node wants to cooperate with a single relay for data transmission. To use the proposed single relay selection scheme, the source node make a little different pattern signal which is not complex pattern and broadcasts it. The proposed scheme does not require the channel state information between the source node and candidates of the relay during the relay selection. Therefore, it is able to be used in many fields. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=relay%20selection" title="relay selection">relay selection</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20communication" title=" cooperative communication"> cooperative communication</a>, <a href="https://publications.waset.org/abstracts/search?q=df" title=" df"> df</a>, <a href="https://publications.waset.org/abstracts/search?q=channel%20codes" title=" channel codes"> channel codes</a> </p> <a href="https://publications.waset.org/abstracts/3523/efficient-single-relay-selection-scheme-for-cooperative-communication" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3523.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">670</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2281</span> Establishment of Aquaculture Cooperative for Sustainable Local People Economic Welfare in Jatiluhur, West Java, Indonesia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aisyah%20Nurfitria">Aisyah Nurfitria</a>, <a href="https://publications.waset.org/abstracts/search?q=Alifa%20Rahmadia%20Putri"> Alifa Rahmadia Putri</a>, <a href="https://publications.waset.org/abstracts/search?q=Andini%20Lestari"> Andini Lestari</a>, <a href="https://publications.waset.org/abstracts/search?q=Kartika%20Sukmatullahi%20Hasanah"> Kartika Sukmatullahi Hasanah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mutiara%20Mayang%20Oktavia"> Mutiara Mayang Oktavia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The research aims to describe and analyze the background and condition of Jatiluhur Dam, West Java, Indonesia. The Jatiluhur Dam as known as the biggest dam in West Java has huge fisheries resource, which is supposed to assure the local people appropriateness of living. Unfortunately based on this field research, the local people are living a life in under poverty line. This study focuses on increasing local people economic welfare through “Aquaculture Cooperative” implementation. Empower and diversify income of local people is the purpose of this study. In the same way, this study also focuses on the sustainable local people’s livelihoods. In order to obtain the sustainability of them, recovering the fisheries of Jatiluhur Dam is the part of “Aquaculture Cooperative” program. Method that is used in this research is a qualitative approach by literature review and in-depth interview through direct observation as data collecting techniques. Factors such as social and economic condition are also considered in order to know how “Aquaculture Cooperative” able to accepted by local people. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aquaculture%20cooperative" title="aquaculture cooperative">aquaculture cooperative</a>, <a href="https://publications.waset.org/abstracts/search?q=economic%20welfare" title=" economic welfare"> economic welfare</a>, <a href="https://publications.waset.org/abstracts/search?q=Jatiluhur%20fisheries" title=" Jatiluhur fisheries"> Jatiluhur fisheries</a>, <a href="https://publications.waset.org/abstracts/search?q=West%20Java" title=" West Java "> West Java </a> </p> <a href="https://publications.waset.org/abstracts/22728/establishment-of-aquaculture-cooperative-for-sustainable-local-people-economic-welfare-in-jatiluhur-west-java-indonesia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22728.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">447</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2280</span> Investigation of the Effect of Teaching Thinking and Research Lesson by Cooperative and Traditional Methods on Creativity of Sixth Grade Students</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Faroogh%20Khakzad">Faroogh Khakzad</a>, <a href="https://publications.waset.org/abstracts/search?q=Marzieh%20Dehghani"> Marzieh Dehghani</a>, <a href="https://publications.waset.org/abstracts/search?q=Elahe%20Hejazi"> Elahe Hejazi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study investigates the effect of teaching a Thinking and Research lesson by cooperative and traditional methods on the creativity of sixth-grade students in Piranshahr province. The statistical society includes all the sixth-grade students of Piranshahr province. The sample of this studytable was selected by available sampling from among male elementary schools of Piranshahr. They were randomly assigned into two groups of cooperative teaching method and traditional teaching method. The design of the study is quasi-experimental with a control group. In this study, to assess students’ creativity, Abedi’s creativity questionnaire was used. Based on Cronbach’s alpha coefficient, the reliability of the factor flow was 0.74, innovation was 0.61, flexibility was 0.63, and expansion was 0.68. To analyze the data, t-test, univariate and multivariate covariance analysis were used for evaluation of the difference of means and the pretest and posttest scores. The findings of the research showed that cooperative teaching method does not significantly increase creativity (p > 0.05). Moreover, cooperative teaching method was found to have significant effect on flow factor (p < 0.05), but in innovation and expansion factors no significant effect was observed (p < 0.05). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20teaching%20method" title="cooperative teaching method">cooperative teaching method</a>, <a href="https://publications.waset.org/abstracts/search?q=traditional%20teaching%20method" title=" traditional teaching method"> traditional teaching method</a>, <a href="https://publications.waset.org/abstracts/search?q=creativity" title=" creativity"> creativity</a>, <a href="https://publications.waset.org/abstracts/search?q=flow" title=" flow"> flow</a>, <a href="https://publications.waset.org/abstracts/search?q=innovation" title=" innovation"> innovation</a>, <a href="https://publications.waset.org/abstracts/search?q=flexibility" title=" flexibility"> flexibility</a>, <a href="https://publications.waset.org/abstracts/search?q=expansion" title=" expansion"> expansion</a>, <a href="https://publications.waset.org/abstracts/search?q=thinking%20and%20research%20lesson" title=" thinking and research lesson"> thinking and research lesson</a> </p> <a href="https://publications.waset.org/abstracts/81155/investigation-of-the-effect-of-teaching-thinking-and-research-lesson-by-cooperative-and-traditional-methods-on-creativity-of-sixth-grade-students" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81155.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">316</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2279</span> Relay Node Selection Algorithm for Cooperative Communications in Wireless Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sunmyeng%20Kim">Sunmyeng Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> IEEE 802.11a/b/g standards support multiple transmission rates. Even though the use of multiple transmission rates increase the WLAN capacity, this feature leads to the performance anomaly problem. Cooperative communication was introduced to relieve the performance anomaly problem. Data packets are delivered to the destination much faster through a relay node with high rate than through direct transmission to the destination at low rate. In the legacy cooperative protocols, a source node chooses a relay node only based on the transmission rate. Therefore, they are not so feasible in multi-flow environments since they do not consider the effect of other flows. To alleviate the effect, we propose a new relay node selection algorithm based on the transmission rate and channel contention level. Performance evaluation is conducted using simulation, and shows that the proposed protocol significantly outperforms the previous protocol in terms of throughput and delay. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20communications" title="cooperative communications">cooperative communications</a>, <a href="https://publications.waset.org/abstracts/search?q=MAC%20protocol" title=" MAC protocol"> MAC protocol</a>, <a href="https://publications.waset.org/abstracts/search?q=relay%20node" title=" relay node"> relay node</a>, <a href="https://publications.waset.org/abstracts/search?q=WLAN" title=" WLAN"> WLAN</a> </p> <a href="https://publications.waset.org/abstracts/7034/relay-node-selection-algorithm-for-cooperative-communications-in-wireless-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7034.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">333</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2278</span> Co-Immobilization of Palladium Nanoparticles and Polyoxometalate into the Cavities of the Mesocellular Foams: A Biomimetic Cooperative Catalytic System for Aerobic Oxidation of Alcohols under Green Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saeed%20Chehri">Saeed Chehri</a>, <a href="https://publications.waset.org/abstracts/search?q=Sirvan%20Moradi"> Sirvan Moradi</a>, <a href="https://publications.waset.org/abstracts/search?q=Amin%20Rostami"> Amin Rostami</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperative catalyst systems have been developed as highly promising sustainable alternatives to traditional catalysts. In these catalysts, two or more catalytic centers cooperate to reduce the energy of chemical transformations. In nature, such systems are abundantly seen in metalloenzymes that use metal and an organic cofactor. We have designed a reusable cooperative catalyst oxidation system consisting of palladium nanoparticles and polyoxometalate. This biomimetic cooperative catalytic system was synthesized by the stepwise immobilization of palladium nanoparticlesandpolyoxometalateinto the same cavity of siliceous mesocellularfoams (Pd-POM@MCF)and wascharacterizedby SEM, EDX, FT-IR, TGAand ICP techniques. POM-Pd@MCF/HQexhibits high activity toward aerobic oxidation of alcohols to the corresponding carbonyl compoundsin water solvent at room temperature. The major novelties and advantages of this oxidation method are as follows: (i) this is the first report of the co-immobilization of polyoxometalateand palladium for use as a robust and highlyefficient heterogeneouscooperative oxidative nanocatalyst system for aerobic oxidation of alcohols, (ii) oxidation of alcoholswere performed using an ideal oxidant with good to high yields in a green solvent at ambient temperature and (iii) the immobilization of the oxygen-activating catalyst(polyoxometalate) and oxidizing catalyst (Pd) onto MCF provide practical cooperative catalyst the system that can be reused several times without a significant loss of activity (vi) the methodsconform to several of the guiding principles of green chemistry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=palladium%20nanoparticles" title="palladium nanoparticles">palladium nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=polyoxometalate" title=" polyoxometalate"> polyoxometalate</a>, <a href="https://publications.waset.org/abstracts/search?q=reusable%20%20cooperative%20catalytic%20system" title=" reusable cooperative catalytic system"> reusable cooperative catalytic system</a>, <a href="https://publications.waset.org/abstracts/search?q=biomimetic%20oxidation%20reaction" title=" biomimetic oxidation reaction"> biomimetic oxidation reaction</a> </p> <a href="https://publications.waset.org/abstracts/150615/co-immobilization-of-palladium-nanoparticles-and-polyoxometalate-into-the-cavities-of-the-mesocellular-foams-a-biomimetic-cooperative-catalytic-system-for-aerobic-oxidation-of-alcohols-under-green-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150615.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">119</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2277</span> A Cooperative Transmission Scheme Using Two Sources Based on OFDM System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bit-Na%20Kwon">Bit-Na Kwon</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong-Hyun%20Ha"> Dong-Hyun Ha</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyoung-Kyu%20Song"> Hyoung-Kyu Song</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In wireless communication, space-time block code (STBC), cyclic delay diversity (CDD) and space-time cyclic delay diversity (STCDD) are used as the spatial diversity schemes and have been widely studied for the reliable communication. If these schemes are used, the communication system can obtain the improved performance. However, the quality of the system is degraded when the distance between a source and a destination is distant in wireless communication system. In this paper, the cooperative transmission scheme using two sources is proposed and improves the performance of the wireless communication system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=OFDM" title="OFDM">OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=Cooperative%20communication" title=" Cooperative communication"> Cooperative communication</a>, <a href="https://publications.waset.org/abstracts/search?q=CDD" title=" CDD"> CDD</a>, <a href="https://publications.waset.org/abstracts/search?q=STBC" title=" STBC"> STBC</a>, <a href="https://publications.waset.org/abstracts/search?q=STCDD" title=" STCDD"> STCDD</a> </p> <a href="https://publications.waset.org/abstracts/20611/a-cooperative-transmission-scheme-using-two-sources-based-on-ofdm-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20611.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">468</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2276</span> Cooperative AF Scheme for Multi Source and Terminal in Edge of Cell Coverage</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Myoung-Jin%20Kim">Myoung-Jin Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang-Bin%20Ha"> Chang-Bin Ha</a>, <a href="https://publications.waset.org/abstracts/search?q=Yeong-Seop%20Ahn"> Yeong-Seop Ahn</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyoung-Kyu%20Song"> Hyoung-Kyu Song</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a cooperative communication scheme for improve wireless communication performance. When the receiver is located in the edge of coverage, the signal from the transmitter is distorted for various reasons such as inter-cell interference (ICI), power reduction, incorrect channel estimation. In order to improve communication performance, the proposed scheme adds the relay. By the relay, the receiver has diversity gain. In this paper, two base stations, one relay and one destination are considered. The two base stations transmit same time to relay and destination. The relay forwarding to destination and the destination detects signals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20communication" title="cooperative communication">cooperative communication</a>, <a href="https://publications.waset.org/abstracts/search?q=diversity%20gain" title=" diversity gain"> diversity gain</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a>, <a href="https://publications.waset.org/abstracts/search?q=MMSE" title=" MMSE"> MMSE</a> </p> <a href="https://publications.waset.org/abstracts/42217/cooperative-af-scheme-for-multi-source-and-terminal-in-edge-of-cell-coverage" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42217.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">390</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2275</span> Transmit Power Optimization for Cooperative Beamforming in Reverse-Link MIMO Ad-Hoc Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Younghyun%20Jeon">Younghyun Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Seungjoo%20Maeng"> Seungjoo Maeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the Ad-hoc network, the great interests regarding MIMO scheme leads to their combination, which is also utilized into its applicable network. We manage the field of the problem into Reverse-link MIMO Ad-hoc Network (RMAN) and propose the methodology to maximize the data rate with its power consumption using Node-Cooperative beamforming technique. Based on the result of mathematical optimization formulation, we design the algorithm to construct optimal orthogonal weight vector according to channel feedback and control its transmission power according to QoS-pricing value level. In simulation results, we show the validity of the proposed mathematical optimization result and algorithm which mean that the sum-rate of each link is converged into some point. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ad-hoc%20network" title="ad-hoc network">ad-hoc network</a>, <a href="https://publications.waset.org/abstracts/search?q=MIMO" title=" MIMO"> MIMO</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20beamforming" title=" cooperative beamforming"> cooperative beamforming</a>, <a href="https://publications.waset.org/abstracts/search?q=transmit%20power" title=" transmit power "> transmit power </a> </p> <a href="https://publications.waset.org/abstracts/57761/transmit-power-optimization-for-cooperative-beamforming-in-reverse-link-mimo-ad-hoc-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57761.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">398</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2274</span> The Impact of Supply Chain Relationship Quality on Cooperative Strategy and Visibility</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jung-Hsuan%20Hsu">Jung-Hsuan Hsu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to intense competition within the industry, companies have increasingly recognized partnerships with other companies. In addition, with outsourcing and globalization of the supply chain, it leads to companies' increasing reliance on external resources. Consequently, supply chain network becomes complex, so that it reduces the visibility of the manufacturing process. Therefore, this study is going to focus on the impact of supply chain relationship quality (SCRQ) on cooperative strategy and visibility. Questionnaire survey is going to be conducted as research method, using the organic food industry as the research subject, and the sampling method is random sampling. Finally, the data analysis will use SPSS statistical software and AMOS software to analyze and verify the hypothesis. The expected results in this study is to evaluate the supply chain relationship quality between Taiwan's food manufacturing and their suppliers regarding whether it has a positive impact for the persistence, frequency and diversity of cooperative strategy, as well as the dimensions of supply chain relationship quality on visibility regarding whether it has a positive effect. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=supply%20chain%20relationship%20quality%20%28SCRQ%29" title="supply chain relationship quality (SCRQ)">supply chain relationship quality (SCRQ)</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20strategy" title=" cooperative strategy"> cooperative strategy</a>, <a href="https://publications.waset.org/abstracts/search?q=visibility" title=" visibility"> visibility</a>, <a href="https://publications.waset.org/abstracts/search?q=competition" title=" competition"> competition</a> </p> <a href="https://publications.waset.org/abstracts/8478/the-impact-of-supply-chain-relationship-quality-on-cooperative-strategy-and-visibility" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8478.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">451</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2273</span> Effect of Cooperative Learning Strategy on Mathematics Achievement and Retention of Senior Secondary School Students of Different Ability Levels in Taraba State, Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Onesimus%20Bulus%20Shiaki">Onesimus Bulus Shiaki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study investigated the effect of cooperative learning strategy on mathematics achievement and retention among senior secondary school students of different abilities in Taraba State Nigeria. Cooperative learning strategy could hopefully contribute to students’ achievement which will spur the teachers to develop strategies for better learning. The quasi-experimental of pretest, posttest and control group design was adopted in this study. A sample of one hundred and sixty-four (164) Senior Secondary Two (SS2) students were selected from a population of twelve thousand, eight hundred and seventy-three (12,873) SS2 Students in Taraba State. Two schools with equivalent mean scores in the pre-test were randomly assigned to experimental and control groups. The experimental group students were stratified according to ability levels of low, medium and high. The experimental group was guided by the research assistants using the cooperative learning instructional package. After six weeks post-test was administered to the two groups while the retention test was administered two weeks after the post-test. The researcher developed a 50-item Mathematics Achievement Test (MAT) which was validated by experts obtaining the reliability coefficient of 0.87. Mean scores and standard deviations were used to answer the research questions while the Analysis of Co-variance (ANCOVA) was used to test the hypotheses. Major findings from the statistical analysis showed that cooperative learning strategy has a significant effect on the mean achievement of students as well as retention among students of high, medium and low ability in mathematics. However, cooperative learning strategy has no effect on the interaction of ability level and retention. Based on the results obtained, it was therefore recommended that the adoption of the use of cooperative learning strategy in the teaching and learning of mathematics in senior secondary schools be initiated, maintained and sustained for the benefit of senior secondary school students in Taraba State. Periodic Government sponsored in-service training in form of long vacation training programme, workshops, conferences and seminars on the nature, scope, and use of cooperative learning strategy should be organized for senior secondary school mathematics teachers in Taraba state. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ability%20level" title="ability level">ability level</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning" title=" cooperative learning"> cooperative learning</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematics%20achievement" title=" mathematics achievement"> mathematics achievement</a>, <a href="https://publications.waset.org/abstracts/search?q=retention" title=" retention"> retention</a> </p> <a href="https://publications.waset.org/abstracts/96515/effect-of-cooperative-learning-strategy-on-mathematics-achievement-and-retention-of-senior-secondary-school-students-of-different-ability-levels-in-taraba-state-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96515.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">161</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2272</span> Wireless Transmission of Big Data Using Novel Secure Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Thiagarajan">K. Thiagarajan</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Saranya"> K. Saranya</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Veeraiah"> A. Veeraiah</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Sudha"> B. Sudha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a novel algorithm for secure, reliable and flexible transmission of big data in two hop wireless networks using cooperative jamming scheme. Two hop wireless networks consist of source, relay and destination nodes. Big data has to transmit from source to relay and from relay to destination by deploying security in physical layer. Cooperative jamming scheme determines transmission of big data in more secure manner by protecting it from eavesdroppers and malicious nodes of unknown location. The novel algorithm that ensures secure and energy balance transmission of big data, includes selection of data transmitting region, segmenting the selected region, determining probability ratio for each node (capture node, non-capture and eavesdropper node) in every segment, evaluating the probability using binary based evaluation. If it is secure transmission resume with the two- hop transmission of big data, otherwise prevent the attackers by cooperative jamming scheme and transmit the data in two-hop transmission. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=big%20data" title="big data">big data</a>, <a href="https://publications.waset.org/abstracts/search?q=two-hop%20transmission" title=" two-hop transmission"> two-hop transmission</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20layer%20wireless%20security" title=" physical layer wireless security"> physical layer wireless security</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20jamming" title=" cooperative jamming"> cooperative jamming</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20balance" title=" energy balance"> energy balance</a> </p> <a href="https://publications.waset.org/abstracts/30860/wireless-transmission-of-big-data-using-novel-secure-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30860.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">490</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2271</span> Net Fee and Commission Income Determinants of European Cooperative Banks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karol%C3%ADna%20Vozkov%C3%A1">Karolína Vozková</a>, <a href="https://publications.waset.org/abstracts/search?q=Mat%C4%9Bj%20Kuc"> Matěj Kuc</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Net fee and commission income is one of the key elements of a bank’s core income. In the current low-interest rate environment, this type of income is gaining importance relative to net interest income. This paper analyses the effects of bank and country specific determinants of net fee and commission income on a set of cooperative banks from European countries in the 2007-2014 period. In order to do that, dynamic panel data methods (system Generalized Methods of Moments) were employed. Subsequently, alternative panel data methods were run as robustness checks of the analysis. Strong positive impact of bank concentration on the share of net fee and commission income was found, which proves that cooperative banks tend to display a higher share of fee income in less competitive markets. This is probably connected with the fact that they stick with their traditional deposit-taking and loan-providing model and fees on these services are driven down by the competitors. Moreover, compared to commercial banks, cooperatives do not expand heavily into non-traditional fee bearing services under competition and their overall fee income share is therefore decreasing with the increased competitiveness of the sector. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20banking" title="cooperative banking">cooperative banking</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20panel%20data%20models" title=" dynamic panel data models"> dynamic panel data models</a>, <a href="https://publications.waset.org/abstracts/search?q=net%20fee%20and%20commission%20income" title=" net fee and commission income"> net fee and commission income</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20GMM" title=" system GMM"> system GMM</a> </p> <a href="https://publications.waset.org/abstracts/55990/net-fee-and-commission-income-determinants-of-european-cooperative-banks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55990.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">330</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2270</span> Cooperative Diversity Scheme Based on MIMO-OFDM in Small Cell Network </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dong-Hyun%20Ha">Dong-Hyun Ha</a>, <a href="https://publications.waset.org/abstracts/search?q=Young-Min%20Ko"> Young-Min Ko</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang-Bin%20Ha"> Chang-Bin Ha</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyoung-Kyu%20Song"> Hyoung-Kyu Song</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In Heterogeneous network (HetNet) can provide high quality of a service in a wireless communication system by composition of small cell networks. The composition of small cell networks improves cell coverage and capacity to the mobile users.Recently, various techniques using small cell networks have been researched in the wireless communication system. In this paper, the cooperative scheme obtaining high reliability is proposed in the small cell networks. The proposed scheme suggests a cooperative small cell system and the new signal transmission technique in the proposed system model. The new signal transmission technique applies a cyclic delay diversity (CDD) scheme based on the multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system to obtain improved performance. The improved performance of the proposed scheme is confirmed by the simulation results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20transmission" title="adaptive transmission">adaptive transmission</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20communication" title=" cooperative communication"> cooperative communication</a>, <a href="https://publications.waset.org/abstracts/search?q=diversity%20gain" title=" diversity gain"> diversity gain</a>, <a href="https://publications.waset.org/abstracts/search?q=OFDM" title=" OFDM"> OFDM</a> </p> <a href="https://publications.waset.org/abstracts/33086/cooperative-diversity-scheme-based-on-mimo-ofdm-in-small-cell-network" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33086.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">502</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2269</span> The Development Learning Module Physics based on Guided Inquiry Approach on Model Cooperative Learning Type STAD (Student Team Achievement Division) in the Main Subject of Temperature and Heat</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fani%20Firmahandari">Fani Firmahandari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The development learning module physics based on guided inquiry approach on model cooperative learning type STAD (Student Team Achievement Division) in the main subject of temperature and heat. The research development aimed to produce physics learning module based on guided cooperative learning type STAD (Student Team Achievement Division) in the main subject of temperature and heat to the student in X class. The research method used Research and Development approach. The development procedure of this module includes potential problems, data collection to meet the need, product design, and feasibility of this module. The impact of learning can be seen or observed clearly when the learning process takes place, the teachers or the students already implemented measures cooperative learning model type STAD, so that the learning process goes well, the interaction of teachers and students, students with student looks good, besides that students can interact and work together in group. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning%20type%20STAD%20%28student%20team%20achievement%20division%29" title="cooperative learning type STAD (student team achievement division)">cooperative learning type STAD (student team achievement division)</a>, <a href="https://publications.waset.org/abstracts/search?q=development" title=" development"> development</a>, <a href="https://publications.waset.org/abstracts/search?q=inquiry" title=" inquiry"> inquiry</a>, <a href="https://publications.waset.org/abstracts/search?q=interaction%20students" title=" interaction students"> interaction students</a> </p> <a href="https://publications.waset.org/abstracts/39814/the-development-learning-module-physics-based-on-guided-inquiry-approach-on-model-cooperative-learning-type-stad-student-team-achievement-division-in-the-main-subject-of-temperature-and-heat" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39814.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">360</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2268</span> Collaborative Energy Optimization for Multi-Microgrid Distribution System Based on Two-Stage Game Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hanmei%20Peng">Hanmei Peng</a>, <a href="https://publications.waset.org/abstracts/search?q=Yiqun%20Wang"> Yiqun Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Mao%20Tan"> Mao Tan</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhuocen%20Dai"> Zhuocen Dai</a>, <a href="https://publications.waset.org/abstracts/search?q=Yongxin%20Su"> Yongxin Su</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Efficient energy management in multi-microgrid distribution systems holds significant importance for enhancing the economic benefits of regional power grids. To better balance conflicts among various stakeholders, a two-stage game-based collaborative optimization approach is proposed in this paper, effectively addressing the realistic scenario involving both competition and collaboration among stakeholders. The first stage, aimed at maximizing individual benefits, involves constructing a non-cooperative tariff game model for the distribution network and surplus microgrid. In the second stage, considering power flow and physical line capacity constraints we establish a cooperative P2P game model for the multi-microgrid distribution system, and the optimization involves employing the Lagrange method of multipliers to handle complex constraints. Simulation results demonstrate that the proposed approach can effectively improve the system economics while harmonizing individual and collective rationality. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20game" title="cooperative game">cooperative game</a>, <a href="https://publications.waset.org/abstracts/search?q=collaborative%20optimization" title=" collaborative optimization"> collaborative optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-microgrid%20distribution%20system" title=" multi-microgrid distribution system"> multi-microgrid distribution system</a>, <a href="https://publications.waset.org/abstracts/search?q=non-cooperative%20game" title=" non-cooperative game"> non-cooperative game</a> </p> <a href="https://publications.waset.org/abstracts/182103/collaborative-energy-optimization-for-multi-microgrid-distribution-system-based-on-two-stage-game-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182103.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">71</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2267</span> The Effect of Cooperative Learning on Academic Achievement of Grade Nine Students in Mathematics: The Case of Mettu Secondary and Preparatory School</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Diriba%20Gemechu">Diriba Gemechu</a>, <a href="https://publications.waset.org/abstracts/search?q=Lamessa%20Abebe"> Lamessa Abebe</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to examine the effect of cooperative learning method on student’s academic achievement and on the achievement level over a usual method in teaching different topics of mathematics. The study also examines the perceptions of students towards cooperative learning. Cooperative learning is the instructional strategy in which pairs or small groups of students with different levels of ability work together to accomplish a shared goal. The aim of this cooperation is for students to maximize their own and each other learning, with members striving for joint benefit. The teacher’s role changes from wise on the wise to guide on the side. Cooperative learning due to its influential aspects is the most prevalent teaching-learning technique in the modern world. Therefore the study was conducted in order to examine the effect of cooperative learning on the academic achievement of grade 9 students in Mathematics in case of Mettu secondary school. Two sample sections are randomly selected by which one section served randomly as an experimental and the other as a comparison group. Data gathering instruments are achievement tests and questionnaires. A treatment of STAD method of cooperative learning was provided to the experimental group while the usual method is used in the comparison group. The experiment lasted for one semester. To determine the effect of cooperative learning on the student’s academic achievement, the significance of difference between the scores of groups at 0.05 levels was tested by applying t test. The effect size was calculated to see the strength of the treatment. The student’s perceptions about the method were tested by percentiles of the questionnaires. During data analysis, each group was divided into high and low achievers on basis of their previous Mathematics result. Data analysis revealed that both the experimental and comparison groups were almost equal in Mathematics at the beginning of the experiment. The experimental group out scored significantly than comparison group on posttest. Additionally, the comparison of mean posttest scores of high achievers indicates significant difference between the two groups. The same is true for low achiever students of both groups on posttest. Hence, the result of the study indicates the effectiveness of the method for Mathematics topics as compared to usual method of teaching. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=academic%20achievement" title="academic achievement">academic achievement</a>, <a href="https://publications.waset.org/abstracts/search?q=comparison%20group" title=" comparison group"> comparison group</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning" title=" cooperative learning"> cooperative learning</a>, <a href="https://publications.waset.org/abstracts/search?q=experimental%20group" title=" experimental group"> experimental group</a> </p> <a href="https://publications.waset.org/abstracts/68232/the-effect-of-cooperative-learning-on-academic-achievement-of-grade-nine-students-in-mathematics-the-case-of-mettu-secondary-and-preparatory-school" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68232.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">246</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2266</span> Adaptive Cooperative Control of Nonholonomic Mobile Robot Based on Immersion and Invariance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Imil%20Hamda%20Imran">Imil Hamda Imran</a>, <a href="https://publications.waset.org/abstracts/search?q=Sami%20El%20Ferik"> Sami El Ferik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with adaptive cooperative control of non holonomic mobile robot moved together in a given formation. The controller is designed based on the Immersion and Invariance (I&I) approach. I&I is a framework for adaptive stabilization of nonlinear systems with uncertain parameters. We investigate the tracking control of non holonomic mobile robot with uncertainties in The I&I-based adaptive controller regulates the angular and linear velocity of non holonomic mobile robot. The results demonstrate that the ability of I&I-based adaptive cooperative control in tracking the position of non holonomic mobile robot. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nonholonomic%20mobile%20robot" title="nonholonomic mobile robot">nonholonomic mobile robot</a>, <a href="https://publications.waset.org/abstracts/search?q=immersion%20and%20invariance" title=" immersion and invariance"> immersion and invariance</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptive%20control" title=" adaptive control"> adaptive control</a>, <a href="https://publications.waset.org/abstracts/search?q=uncertain%20nonlinear%20systems" title=" uncertain nonlinear systems"> uncertain nonlinear systems</a> </p> <a href="https://publications.waset.org/abstracts/21832/adaptive-cooperative-control-of-nonholonomic-mobile-robot-based-on-immersion-and-invariance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21832.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">499</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2265</span> Cooperative Learning Mechanism in Intelligent Multi-Agent System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayman%20M.%20Mansour">Ayman M. Mansour</a>, <a href="https://publications.waset.org/abstracts/search?q=Bilal%20Hawashin"> Bilal Hawashin</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20A.%20Mansour"> Mohammed A. Mansour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we propose a cooperative learning mechanism in a multi-agent intelligent system. The basic idea is that intelligent agents are capable of collaborating with one another by sharing their knowledge. The agents will start collaboration by providing their knowledge rules to the other agents. This will allow the most important and insightful detection rules produced by the most experienced agent to bubble up for the benefit of the entire agent community. The updated rules will lead to improving the agents’ decision performance. To evaluate our approach, we designed a five–agent system and implemented it using JADE and FuzzyJess software packages. The agents will work with each other to make a decision about a suspicious medical case. This system provides quick response rate and the decision is faster than the manual methods. This will save patients life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intelligent" title="intelligent">intelligent</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-agent%20system" title=" multi-agent system"> multi-agent system</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative" title=" cooperative"> cooperative</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy" title=" fuzzy"> fuzzy</a>, <a href="https://publications.waset.org/abstracts/search?q=learning" title=" learning"> learning</a> </p> <a href="https://publications.waset.org/abstracts/47913/cooperative-learning-mechanism-in-intelligent-multi-agent-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47913.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">685</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2264</span> Cooperative Learning: A Case Study on Teamwork through Community Service Project</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Priyadharshini%20Ahrumugam">Priyadharshini Ahrumugam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperative groups through much research have been recognized to churn remarkable achievements instead of solitary or individualistic efforts. Based on Johnson and Johnson’s model of cooperative learning, the five key components of cooperation are positive interdependence, face-to-face promotive interaction, individual accountability, social skills and group processing. In 2011, the Malaysian Ministry of Higher Education (MOHE) introduced the Holistic Student Development policy with the aim to develop morally sound individuals equipped with lifelong learning skills. The Community Service project was included in the improvement initiative. The purpose of this study is to assess the relationship of team-based learning in facilitating particularly students’ positive interdependence and face-to-face promotive interaction. The research methods involve in-depth interviews with the team leaders and selected team members, and a content analysis of the undergraduate students’ reflective journals. A significant positive relationship was found between students’ progressive outlook towards teamwork and the highlighted two components. The key findings show that students have gained in their individual learning and work results through teamwork and interaction with other students. The inclusion of Community Service as a MOHE subject resonates with cooperative learning methods that enhances supportive relationships and develops students’ social skills together with their professional skills. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=community%20service" title="community service">community service</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning" title=" cooperative learning"> cooperative learning</a>, <a href="https://publications.waset.org/abstracts/search?q=positive%20interdependence" title=" positive interdependence"> positive interdependence</a>, <a href="https://publications.waset.org/abstracts/search?q=teamwork" title=" teamwork"> teamwork</a> </p> <a href="https://publications.waset.org/abstracts/38647/cooperative-learning-a-case-study-on-teamwork-through-community-service-project" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38647.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">309</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2263</span> Screen Method of Distributed Cooperative Navigation Factors for Unmanned Aerial Vehicle Swarm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Can%20Zhang">Can Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Qun%20Li"> Qun Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Yonglin%20Lei"> Yonglin Lei</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhi%20Zhu"> Zhi Zhu</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong%20Guo"> Dong Guo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aiming at the problem of factor screen in distributed collaborative navigation of dense UAV swarm, an efficient distributed collaborative navigation factor screen method is proposed. The method considered the balance between computing load and positioning accuracy. The proposed algorithm utilized the factor graph model to implement a distributed collaborative navigation algorithm. The GNSS information of the UAV itself and the ranging information between the UAVs are used as the positioning factors. In this distributed scheme, a local factor graph is established for each UAV. The positioning factors of nodes with good geometric position distribution and small variance are selected to participate in the navigation calculation. To demonstrate and verify the proposed methods, the simulation and experiments in different scenarios are performed in this research. Simulation results show that the proposed scheme achieves a good balance between the computing load and positioning accuracy in the distributed cooperative navigation calculation of UAV swarm. This proposed algorithm has important theoretical and practical value for both industry and academic areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=screen%20method" title="screen method">screen method</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20positioning%20system" title=" cooperative positioning system"> cooperative positioning system</a>, <a href="https://publications.waset.org/abstracts/search?q=UAV%20swarm" title=" UAV swarm"> UAV swarm</a>, <a href="https://publications.waset.org/abstracts/search?q=factor%20graph" title=" factor graph"> factor graph</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20navigation" title=" cooperative navigation"> cooperative navigation</a> </p> <a href="https://publications.waset.org/abstracts/166690/screen-method-of-distributed-cooperative-navigation-factors-for-unmanned-aerial-vehicle-swarm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166690.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">80</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2262</span> A Cooperative Signaling Scheme for Global Navigation Satellite Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Keunhong%20Chae">Keunhong Chae</a>, <a href="https://publications.waset.org/abstracts/search?q=Seokho%20Yoon"> Seokho Yoon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, the global navigation satellite system (GNSS) such as Galileo and GPS is employing more satellites to provide a higher degree of accuracy for the location service, thus calling for a more efficient signaling scheme among the satellites used in the overall GNSS network. In that the network throughput is improved, the spatial diversity can be one of the efficient signaling schemes; however, it requires multiple antenna that could cause a significant increase in the complexity of the GNSS. Thus, a diversity scheme called the cooperative signaling was proposed, where the virtual multiple-input multiple-output (MIMO) signaling is realized with using only a single antenna in the transmit satellite of interest and with modeling the neighboring satellites as relay nodes. The main drawback of the cooperative signaling is that the relay nodes receive the transmitted signal at different time instants, i.e., they operate in an asynchronous way, and thus, the overall performance of the GNSS network could degrade severely. To tackle the problem, several modified cooperative signaling schemes were proposed; however, all of them are difficult to implement due to a signal decoding at the relay nodes. Although the implementation at the relay nodes could be simpler to some degree by employing the time-reversal and conjugation operations instead of the signal decoding, it would be more efficient if we could implement the operations of the relay nodes at the source node having more resources than the relay nodes. So, in this paper, we propose a novel cooperative signaling scheme, where the data signals are combined in a unique way at the source node, thus obviating the need of the complex operations such as signal decoding, time-reversal and conjugation at the relay nodes. The numerical results confirm that the proposed scheme provides the same performance in the cooperative diversity and the bit error rate (BER) as the conventional scheme, while reducing the complexity at the relay nodes significantly. Acknowledgment: This work was supported by the National GNSS Research Center program of Defense Acquisition Program Administration and Agency for Defense Development. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=global%20navigation%20satellite%20network" title="global navigation satellite network">global navigation satellite network</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20signaling" title=" cooperative signaling"> cooperative signaling</a>, <a href="https://publications.waset.org/abstracts/search?q=data%20combining" title=" data combining"> data combining</a>, <a href="https://publications.waset.org/abstracts/search?q=nodes" title=" nodes"> nodes</a> </p> <a href="https://publications.waset.org/abstracts/54855/a-cooperative-signaling-scheme-for-global-navigation-satellite-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54855.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">280</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2261</span> The Impact of Cooperative Learning on EFL Learners Oral Performance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Narimen%20Hamdini">Narimen Hamdini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The mastery of a foreign language often implies adequate speaking competency and communication. However, it has been marked that the Algerian students’ oral performance is affected by the lack of language practice opportunities. The present study aims at investigating the impact of cooperative learning strategies on the learners’ oral performance through integrating some learning strategies in oral expression classes. Thus, a quasi-experimental study with one group pretest-posttest design was conducted. A convenience sample of 27 second-year students from the University of Jijel, Algeria, was taught during three consecutive weeks through cooperative learning activities in conjunction with regular language instruction in oral expression classes. Regarding data collection, the study makes use of students’ questionnaire, a semi-structured interview with the teachers of oral expression, and orally scored pre-posttest. While the students’ questionnaire aims at exploring the learners ‘speaking difficulties and attitudes towards the implementation of the strategy, the semi-structured interview aims at revealing the teachers’ instructional practices and attitudes toward the integration of CL activities. Finally, the oral tests were conducted before and after the intervention to measure the effect of the strategy on the learners’ oral production. The findings showed that the experimental group scored higher in the posttest. Cooperative learning promotes not only the learner’s oral performances, but also motivation and social skills. Consequently, its implementation in the oral expression classes is validated and recommended. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning" title="cooperative learning">cooperative learning</a>, <a href="https://publications.waset.org/abstracts/search?q=learning" title=" learning"> learning</a>, <a href="https://publications.waset.org/abstracts/search?q=oral%20performance" title=" oral performance"> oral performance</a>, <a href="https://publications.waset.org/abstracts/search?q=teaching" title=" teaching"> teaching</a> </p> <a href="https://publications.waset.org/abstracts/130770/the-impact-of-cooperative-learning-on-efl-learners-oral-performance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130770.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">130</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2260</span> Cooperative Coevolution for Neuro-Evolution of Feed Forward Networks for Time Series Prediction Using Hidden Neuron Connections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ravneil%20Nand">Ravneil Nand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperative coevolution uses problem decomposition methods to solve a larger problem. The problem decomposition deals with breaking down the larger problem into a number of smaller sub-problems depending on their method. Different problem decomposition methods have their own strengths and limitations depending on the neural network used and application problem. In this paper we are introducing a new problem decomposition method known as Hidden-Neuron Level Decomposition (HNL). The HNL method is competing with established problem decomposition method in time series prediction. The results show that the proposed approach has improved the results in some benchmark data sets when compared to the standalone method and has competitive results when compared to methods from literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20coevaluation" title="cooperative coevaluation">cooperative coevaluation</a>, <a href="https://publications.waset.org/abstracts/search?q=feed%20forward%20network" title=" feed forward network"> feed forward network</a>, <a href="https://publications.waset.org/abstracts/search?q=problem%20decomposition" title=" problem decomposition"> problem decomposition</a>, <a href="https://publications.waset.org/abstracts/search?q=neuron" title=" neuron"> neuron</a>, <a href="https://publications.waset.org/abstracts/search?q=synapse" title=" synapse"> synapse</a> </p> <a href="https://publications.waset.org/abstracts/29237/cooperative-coevolution-for-neuro-evolution-of-feed-forward-networks-for-time-series-prediction-using-hidden-neuron-connections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29237.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">336</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2259</span> The Position of Cooperatives and Social Economy in Solving the Problems of Today's Society</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Abbasi">Mohammad Abbasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperatives around the world, relying on the policy of mutual self-help, are a natural tool for Social and economic development, and securing the interests of local communities and social systems has changed. The social economy consists of institutions, cooperatives, bilateral organizations, and unions and associations and their activities have social and economic aspects. Due to the nature of cooperative companies, it can be claimed that all cooperatives have social and economic goals; Because every company A cooperative is formed with the aim of meeting the common needs of society members. These needs sometimes It is aimed at housing or health services, and sometimes cooperative members want to go through it Products and services, employment, and continuous income (for example, in most rural areas of Iran, needs are of this type) to have access. This article also examines the broad methods of participation of Iran's cooperatives in the economy It deals with social issues and provides innovative solutions to solve social issues and problems, and the potential for innovation and growth in using the cooperative model in order to meet economic needs and It proves the sociality of Canadians. In this article, cooperatives whose activities are mostly "social" are mentioned And the activity of many of them in cooperation with government programs in the fields of health, housing, etc. It is a kindergarten and they have proven that they have a cost-effective model in providing services. The conclusion of this discussion shows that the cooperative model for economic activity, with A hundred years of history in Iran has been able to show its value as a tool of innovation in the fields to to prove social, technological, and economic. Cooperatives with about 10 million members in Iran have shown that they are well-known and trusted by the people. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=types%20of%20cooperatives" title="types of cooperatives">types of cooperatives</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20economy" title=" social economy"> social economy</a>, <a href="https://publications.waset.org/abstracts/search?q=Iran" title=" Iran"> Iran</a>, <a href="https://publications.waset.org/abstracts/search?q=non-governmental%20organizations" title=" non-governmental organizations"> non-governmental organizations</a>, <a href="https://publications.waset.org/abstracts/search?q=justice" title=" justice"> justice</a>, <a href="https://publications.waset.org/abstracts/search?q=consumption%20pattern" title=" consumption pattern"> consumption pattern</a> </p> <a href="https://publications.waset.org/abstracts/191693/the-position-of-cooperatives-and-social-economy-in-solving-the-problems-of-todays-society" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191693.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">25</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2258</span> Effectiveness of a Traits Cooperative Learning on Developing Writing Achievement and Composition among Teacher Candidates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelaziz%20Hussien">Abdelaziz Hussien</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article reports investigations of a study into the effectiveness of a traits cooperative learning (TCL) on teacher candidates’ writing achievement, composition, and attitudes towards traits of writing approach and small group learning. Mixed methodologies were used with the participants in a repeated measures quasi-experimental design. Forty-two class teacher candidates, enrolled in the Bahrain Teachers College, completed the pre and post author-developed measures. The results suggest that TCL has a positive effect on the participants’ writing achievement, composition, and attitudes towards traits of writing approach, but not on the attitudes towards small group learning. Further implications to teacher education are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=trait-based%20language%20education" title="trait-based language education">trait-based language education</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperative%20learning" title=" cooperative learning"> cooperative learning</a>, <a href="https://publications.waset.org/abstracts/search?q=writing%20achievement" title=" writing achievement"> writing achievement</a>, <a href="https://publications.waset.org/abstracts/search?q=writing%20composition" title=" writing composition"> writing composition</a>, <a href="https://publications.waset.org/abstracts/search?q=traits%20of%20writing" title=" traits of writing"> traits of writing</a>, <a href="https://publications.waset.org/abstracts/search?q=teacher%20education" title=" teacher education "> teacher education </a> </p> <a href="https://publications.waset.org/abstracts/102335/effectiveness-of-a-traits-cooperative-learning-on-developing-writing-achievement-and-composition-among-teacher-candidates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102335.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2257</span> Low Complexity Carrier Frequency Offset Estimation for Cooperative Orthogonal Frequency Division Multiplexing Communication Systems without Cyclic Prefix</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tsui-Tsai%20Lin">Tsui-Tsai Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperative orthogonal frequency division multiplexing (OFDM) transmission, which possesses the advantages of better connectivity, expanded coverage, and resistance to frequency selective fading, has been a more powerful solution for the physical layer in wireless communications. However, such a hybrid scheme suffers from the carrier frequency offset (CFO) effects inherited from the OFDM-based systems, which lead to a significant degradation in performance. In addition, insertion of a cyclic prefix (CP) at each symbol block head for combating inter-symbol interference will lead to a reduction in spectral efficiency. The design on the CFO estimation for the cooperative OFDM system without CP is a suspended problem. This motivates us to develop a low complexity CFO estimator for the cooperative OFDM decode-and-forward (DF) communication system without CP over the multipath fading channel. Especially, using a block-type pilot, the CFO estimation is first derived in accordance with the least square criterion. A reliable performance can be obtained through an exhaustive two-dimensional (2D) search with a penalty of heavy computational complexity. As a remedy, an alternative solution realized with an iteration approach is proposed for the CFO estimation. In contrast to the 2D-search estimator, the iterative method enjoys the advantage of the substantially reduced implementation complexity without sacrificing the estimate performance. Computer simulations have been presented to demonstrate the efficacy of the proposed CFO estimation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20transmission" title="cooperative transmission">cooperative transmission</a>, <a href="https://publications.waset.org/abstracts/search?q=orthogonal%20frequency%20division%20multiplexing%20%28OFDM%29" title=" orthogonal frequency division multiplexing (OFDM)"> orthogonal frequency division multiplexing (OFDM)</a>, <a href="https://publications.waset.org/abstracts/search?q=carrier%20frequency%20offset" title=" carrier frequency offset"> carrier frequency offset</a>, <a href="https://publications.waset.org/abstracts/search?q=iteration" title=" iteration"> iteration</a> </p> <a href="https://publications.waset.org/abstracts/88236/low-complexity-carrier-frequency-offset-estimation-for-cooperative-orthogonal-frequency-division-multiplexing-communication-systems-without-cyclic-prefix" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88236.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">266</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2256</span> Decode and Forward Cooperative Protocol Enhancement Using Interference Cancellation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Siddeeq%20Y.%20Ameen">Siddeeq Y. Ameen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20K.%20Yousif"> Mohammed K. Yousif</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cooperative communication systems are considered to be a promising technology to improve the system capacity, reliability and performances over fading wireless channels. Cooperative relaying system with a single antenna will be able to reach the advantages of multiple antenna communication systems. It is ideally suitable for the distributed communication systems; the relays can cooperate and form virtual MIMO systems. Thus the paper will aim to investigate the possible enhancement of cooperated system using decode and forward protocol. On decode and forward an attempt to cancel or at least reduce the interference instead of increasing the SNR values is achieved. The latter can be achieved via the use group of relays depending on the channel status from source to relay and relay to destination respectively. In the proposed system, the transmission time has been divided into two phases to be used by decode and forward protocol. The first phase has been allocated for the source to transmit its data whereas the relays and destination nodes are in receiving mode. On the other hand, the second phase is allocated for the first and second groups of relay nodes to relay the data to the destination node. Simulations results have shown an improvement in performance is achieved compared to the conventional decode and forward in terms of BER and transmission rate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooperative%20systems" title="cooperative systems">cooperative systems</a>, <a href="https://publications.waset.org/abstracts/search?q=decode%20and%20forward" title=" decode and forward"> decode and forward</a>, <a href="https://publications.waset.org/abstracts/search?q=interference%20cancellation" title=" interference cancellation"> interference cancellation</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20MIMO" title=" virtual MIMO"> virtual MIMO</a> </p> <a href="https://publications.waset.org/abstracts/5471/decode-and-forward-cooperative-protocol-enhancement-using-interference-cancellation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5471.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">323</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=agricultural%20cooperative&page=1" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=agricultural%20cooperative&page=1">1</a></li> <li class="page-item active"><span class="page-link">2</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=agricultural%20cooperative&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=agricultural%20cooperative&page=4">4</a></li> <li class="page-item"><a class="page-link" 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