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Nahleh</title> <meta name="description" content="Search results for: Zeina Nahleh"> <meta name="keywords" content="Zeina Nahleh"> <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 d-lg-none navbar-toggler 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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="Zeina Nahleh"> <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> 12</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Zeina Nahleh</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> CAM Use and Its Association with Quality of Life in a Sample of Lebanese Breast Cancer Patients: A Cross Sectional Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farah%20Naja">Farah Naja</a>, <a href="https://publications.waset.org/abstracts/search?q=Romy%20Abi%20Fadel"> Romy Abi Fadel</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmin%20Aridi"> Yasmin Aridi</a>, <a href="https://publications.waset.org/abstracts/search?q=Aya%20Zarif"> Aya Zarif</a>, <a href="https://publications.waset.org/abstracts/search?q=Dania%20Hariri"> Dania Hariri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Alameddine"> Mohammad Alameddine</a>, <a href="https://publications.waset.org/abstracts/search?q=Anas%20Mugharbel"> Anas Mugharbel</a>, <a href="https://publications.waset.org/abstracts/search?q=Maya%20Khalil"> Maya Khalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Nahleh"> Zeina Nahleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Arafat%20Tfayli"> Arafat Tfayli</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to assess the prevalence and determinants of CAM use among breast cancer patients in Beirut, Lebanon. A secondary objective is to evaluate the association between CAM use and quality of life (QOL). A cross-sectional survey was conducted on 180 breast cancer patients recruited from two major referral centers in Beirut. In a face to face interview, participants completed a questionnaire comprised of three sections: socio-demographic and lifestyle characteristics, breast cancer condition, and CAM use. The assessment of QOL was carried using the FACT-B Arabic version. Prevalence of CAM use since diagnosis was 40%. CAM use was negatively associated with age, treatment at a philanthropic hospital and positively associated with having an advanced stage of disease. The most commonly used CAM was ‘Special food’ followed by ‘Herbal teas’. Only 4% of CAM users cited health care professionals as influencing their choice of CAM. One in four patients disclosed CAM use to their treating physician. There was no significant association between CAM use and QOL. The use of CAM therapies among breast cancer patients is prevalent in Lebanon. Efforts should be dedicated at educating physicians to discuss CAM use with their patients and advising patients to disclose of their use with their physicians. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breast%20cancer" title="breast cancer ">breast cancer </a>, <a href="https://publications.waset.org/abstracts/search?q=complementary%20medicine" title=" complementary medicine"> complementary medicine</a>, <a href="https://publications.waset.org/abstracts/search?q=alternative%20medicine" title=" alternative medicine"> alternative medicine</a>, <a href="https://publications.waset.org/abstracts/search?q=lebanon" title=" lebanon "> lebanon </a>, <a href="https://publications.waset.org/abstracts/search?q=quality%20of%20life" title=" quality of life "> quality of life </a> </p> <a href="https://publications.waset.org/abstracts/23690/cam-use-and-its-association-with-quality-of-life-in-a-sample-of-lebanese-breast-cancer-patients-a-cross-sectional-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23690.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">513</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">11</span> Prevalence and Determinants of the Use of CAM and Its Association with Quality of Life in a Sample of Lebanese Breast Cancer Patients: A Cross Sectional Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farah%20Naja">Farah Naja</a>, <a href="https://publications.waset.org/abstracts/search?q=Romy%20Abi%20Fadel"> Romy Abi Fadel</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmin%20Aridi"> Yasmin Aridi</a>, <a href="https://publications.waset.org/abstracts/search?q=Aya%20Zarif"> Aya Zarif</a>, <a href="https://publications.waset.org/abstracts/search?q=Dania%20Hariri"> Dania Hariri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Alameddine"> Mohammad Alameddine</a>, <a href="https://publications.waset.org/abstracts/search?q=Anas%20Mugharbel"> Anas Mugharbel</a>, <a href="https://publications.waset.org/abstracts/search?q=Maya%20Khalil"> Maya Khalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Nahleh"> Zeina Nahleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Arafat%20Tfayli"> Arafat Tfayli </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to assess the prevalence and determinants of CAM use among breast cancer patients in Beirut, Lebanon. A secondary objective is to evaluate the association between CAM use and quality of life (QOL). A cross-sectional survey was conducted on 180 breast cancer patients recruited from two major referral centers in Beirut. In a face to face interview, participants completed a questionnaire comprised of three sections: socio-demographic and lifestyle characteristics, breast cancer condition, and CAM use. The assessment of QOL was carried using the FACT-B Arabic version. Prevalence of CAM use since diagnosis was 40%. CAM use was negatively associated with age, treatment at a philanthropic hospital and positively associated with having an advanced stage of disease. The most commonly used CAM was ‘Special food’ followed by ‘Herbal teas’. Only 4% of CAM users cited health care professionals as influencing their choice of CAM. One in four patients disclosed CAM use to their treating physician. There was no significant association between CAM use and QOL. The use of CAM therapies among breast cancer patients is prevalent in Lebanon. Efforts should be dedicated at educating physicians to discuss CAM use with their patients and advising patients to disclose of their use with their physicians. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breast%20cancer" title="breast cancer">breast cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=complementary%20and%20aLternative%20medicine" title=" complementary and aLternative medicine"> complementary and aLternative medicine</a>, <a href="https://publications.waset.org/abstracts/search?q=Lebanon" title=" Lebanon"> Lebanon</a>, <a href="https://publications.waset.org/abstracts/search?q=quality%20of%20life" title=" quality of life"> quality of life</a> </p> <a href="https://publications.waset.org/abstracts/23692/prevalence-and-determinants-of-the-use-of-cam-and-its-association-with-quality-of-life-in-a-sample-of-lebanese-breast-cancer-patients-a-cross-sectional-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23692.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">604</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">10</span> Decision Tree Modeling in Emergency Logistics Planning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yousef%20Abu%20Nahleh">Yousef Abu Nahleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Arun%20Kumar"> Arun Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Fugen%20Daver"> Fugen Daver</a>, <a href="https://publications.waset.org/abstracts/search?q=Reham%20Al-Hindawi"> Reham Al-Hindawi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Despite the availability of natural disaster related time series data for last 110 years, there is no forecasting tool available to humanitarian relief organizations to determine forecasts for emergency logistics planning. This study develops a forecasting tool based on identifying probability of disaster for each country in the world by using decision tree modeling. Further, the determination of aggregate forecasts leads to efficient pre-disaster planning. Based on the research findings, the relief agencies can optimize the various resources allocation in emergency logistics planning. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=decision%20tree%20modeling" title="decision tree modeling">decision tree modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=forecasting" title=" forecasting"> forecasting</a>, <a href="https://publications.waset.org/abstracts/search?q=humanitarian%20relief" title=" humanitarian relief"> humanitarian relief</a>, <a href="https://publications.waset.org/abstracts/search?q=emergency%20supply%20chain" title=" emergency supply chain"> emergency supply chain</a> </p> <a href="https://publications.waset.org/abstracts/7989/decision-tree-modeling-in-emergency-logistics-planning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7989.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">483</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">9</span> Application of Soft Systems Methodology in Solving Disaster Emergency Logistics Problems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alhasan%20Hakami">Alhasan Hakami</a>, <a href="https://publications.waset.org/abstracts/search?q=Arun%20Kumar"> Arun Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20J.%20Shim"> Sung J. Shim</a>, <a href="https://publications.waset.org/abstracts/search?q=Yousef%20Abu%20Nahleh"> Yousef Abu Nahleh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, many high intensity earthquakes have occurred around the world, such as the 2011 earthquake in Tohoku, Japan. These large-scale disasters caused huge casualties and losses. In addition, inefficient disaster response operations also caused the second wave of casualties and losses, and expanded the damage. Effective disaster management can be used to respond to the chaotic situation, and reduce the damage. However, some inefficient disaster response operations are still used. Therefore, this case study chose the 921 earthquakes for analysing disaster emergency logistics problems and proposed the Soft Systems Methodology (SSM) to solve disaster emergency logistics problems. Moreover, it analyses the effect of human factors on system operation, and suggests a solution to improve the system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=soft%20systems%20methodology" title="soft systems methodology">soft systems methodology</a>, <a href="https://publications.waset.org/abstracts/search?q=emergency%20logistics" title=" emergency logistics"> emergency logistics</a>, <a href="https://publications.waset.org/abstracts/search?q=earthquakes" title=" earthquakes"> earthquakes</a>, <a href="https://publications.waset.org/abstracts/search?q=Japan" title=" Japan"> Japan</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20operation" title=" system operation "> system operation </a> </p> <a href="https://publications.waset.org/abstracts/1428/application-of-soft-systems-methodology-in-solving-disaster-emergency-logistics-problems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1428.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">440</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">8</span> Improving Order Quantity Model with Emergency Safety Stock (ESS)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yousef%20Abu%20Nahleh">Yousef Abu Nahleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Alhasan%20Hakami"> Alhasan Hakami</a>, <a href="https://publications.waset.org/abstracts/search?q=Arun%20Kumar"> Arun Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Fugen%20Daver"> Fugen Daver</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study considers the problem of calculating safety stocks in disaster situations inventory systems that face demand uncertainties. Safety stocks are essential to make the supply chain, which is controlled by forecasts of customer needs, in response to demand uncertainties and to reach predefined goal service levels. To solve the problem of uncertainties due to the disaster situations affecting the industry sector, the concept of Emergency Safety Stock (ESS) was proposed. While there exists a huge body of literature on determining safety stock levels, this literature does not address the problem arising due to the disaster and dealing with the situations. In this paper, the problem of improving the Order Quantity Model to deal with uncertainty of demand due to disasters is managed by incorporating a new idea called ESS which is based on the probability of disaster occurrence and uses probability matrix calculated from the historical data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emergency%20Safety%20Stocks" title="Emergency Safety Stocks">Emergency Safety Stocks</a>, <a href="https://publications.waset.org/abstracts/search?q=safety%20stocks" title=" safety stocks"> safety stocks</a>, <a href="https://publications.waset.org/abstracts/search?q=Order%20Quantity%20Model" title=" Order Quantity Model"> Order Quantity Model</a>, <a href="https://publications.waset.org/abstracts/search?q=supply%20chain" title=" supply chain"> supply chain</a> </p> <a href="https://publications.waset.org/abstracts/3399/improving-order-quantity-model-with-emergency-safety-stock-ess" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3399.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">348</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">7</span> Impact of Motor Behaviour Aspects of Autism on Cognitive Ability in Children with Autism Spectrum Disorder</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rana%20Zeina">Rana Zeina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cognitive and behavioral symptoms may, in fact, overlap and be related to the level of the general cognitive function. We measured the behavioral aspects of autism and its correlation to the cognitive ability in 30 children with ASD. We used a neuropsychological battery CANTAB eclipse to evaluate the ASD children's cognitive ability. Individuals with ASDs and challenging behaviors showed significant correlation between some cognitive abilities and motor behavior aspects. Based on these findings we can conclude that the motor behavioral problems in autism affect specific cognitive abilities in ASDs such as comprehension, learning, reversal, acquisition, attention set shifting, and speed of reaction to one stimulus. Future research should also focus on the relationship between motor stereotypes and other subtypes of repetitive behaviors, such as verbal stereotypes, and ritual and routine adherence and use different types of CANTAB tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cognitive%20ability" title="cognitive ability">cognitive ability</a>, <a href="https://publications.waset.org/abstracts/search?q=CANTAB%20test" title=" CANTAB test"> CANTAB test</a>, <a href="https://publications.waset.org/abstracts/search?q=behaviour%20motor%20aspects" title=" behaviour motor aspects"> behaviour motor aspects</a>, <a href="https://publications.waset.org/abstracts/search?q=autism%20spectrum%20disorders" title=" autism spectrum disorders"> autism spectrum disorders</a> </p> <a href="https://publications.waset.org/abstracts/6395/impact-of-motor-behaviour-aspects-of-autism-on-cognitive-ability-in-children-with-autism-spectrum-disorder" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6395.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">493</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">6</span> Approaches and Strategies Used to Increase Student Engagement in Blended Learning Courses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pinar%20Ozdemir%20Ayber">Pinar Ozdemir Ayber</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Hojeij"> Zeina Hojeij</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Blended Learning (BL) is a rapidly growing teaching and learning approach, which brings together the best of both face-to-face and online learning to expand learning opportunities for students. However, there is limited research on the practices, opportunities and quality of instruction in Blended Classrooms, and on the role of the teaching faculty as well as the learners in these types of classes. This paper will highlight the researchers’ experiences and reflections on blending their classes. It will focus on the importance of designing effective lesson plans that emphasize learner engagement and motivation in alignment with course learning outcomes. In addition, it will identify the changing roles of the teacher and the learners and suggest appropriate variations to the traditional classroom setting taking into consideration the benefits and the challenges of the Blended Classroom. It is hoped that this paper would provide sufficient input for participants to reflect on ways they can blend their own lessons to promote ubiquitous learning and student autonomy. Practical tips and ideas will be shared with the participants on various strategies and technologies that were used in the researchers’ classes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=blended%20learning" title="blended learning">blended learning</a>, <a href="https://publications.waset.org/abstracts/search?q=learner%20autonomy" title=" learner autonomy"> learner autonomy</a>, <a href="https://publications.waset.org/abstracts/search?q=learner%20engagement" title=" learner engagement"> learner engagement</a>, <a href="https://publications.waset.org/abstracts/search?q=learner%20motivation" title=" learner motivation"> learner motivation</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20learning%20tools" title=" mobile learning tools"> mobile learning tools</a> </p> <a href="https://publications.waset.org/abstracts/62837/approaches-and-strategies-used-to-increase-student-engagement-in-blended-learning-courses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62837.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">303</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">5</span> Association of Sensory Processing and Cognitive Deficits in Children with Autism Spectrum Disorders – Pioneer Study in Saudi Arabia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rana%20Zeina">Rana Zeina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Objective: The association between Sensory problems and cognitive abilities has been studied in individuals with Autism Spectrum Disorders (ASDs). In this study, we used a neuropsychological test to evaluate memory and attention in ASDs children with sensory problems compared to the ASDs children without sensory problems. Methods: Four visual memory tests of Cambridge Neuropsychological Test Automated Battery (CANTAB) including Big/Little Circle (BLC), Simple Reaction Time (SRT), Intra/Extra Dimensional Set Shift (IED), Spatial Recognition Memory (SRM), were administered to 14 ASDs children with sensory problems compared to 13 ASDs without sensory problems aged 3 to 12 with IQ of above 70. Results: ASDs Individuals with sensory problems performed worse than the ASDs group without sensory problems on comprehension, learning, reversal and simple reaction time tasks, and no significant difference between the two groups was recorded in terms of the visual memory and visual comprehension tasks. Conclusion: The findings of this study suggest that ASDs children with sensory problems are facing deficits in learning, comprehension, reversal, and speed of response to stimuli. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=visual%20memory" title="visual memory">visual memory</a>, <a href="https://publications.waset.org/abstracts/search?q=attention" title=" attention"> attention</a>, <a href="https://publications.waset.org/abstracts/search?q=autism%20spectrum%20disorders" title=" autism spectrum disorders"> autism spectrum disorders</a>, <a href="https://publications.waset.org/abstracts/search?q=CANTAB%20eclipse" title=" CANTAB eclipse"> CANTAB eclipse</a> </p> <a href="https://publications.waset.org/abstracts/6386/association-of-sensory-processing-and-cognitive-deficits-in-children-with-autism-spectrum-disorders-pioneer-study-in-saudi-arabia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6386.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">450</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">4</span> Neural Network Mechanisms Underlying the Combination Sensitivity Property in the HVC of Songbirds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Merabi">Zeina Merabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Arij%20Dao"> Arij Dao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The temporal order of information processing in the brain is an important code in many acoustic signals, including speech, music, and animal vocalizations. Despite its significance, surprisingly little is known about its underlying cellular mechanisms and network manifestations. In the songbird telencephalic nucleus HVC, a subset of neurons shows temporal combination sensitivity (TCS). These neurons show a high temporal specificity, responding differently to distinct patterns of spectral elements and their combinations. HVC neuron types include basal-ganglia-projecting HVCX, forebrain-projecting HVCRA, and interneurons (HVC¬INT), each exhibiting distinct cellular, electrophysiological and functional properties. In this work, we develop conductance-based neural network models connecting the different classes of HVC neurons via different wiring scenarios, aiming to explore possible neural mechanisms that orchestrate the combination sensitivity property exhibited by HVCX, as well as replicating in vivo firing patterns observed when TCS neurons are presented with various auditory stimuli. The ionic and synaptic currents for each class of neurons that are presented in our networks and are based on pharmacological studies, rendering our networks biologically plausible. We present for the first time several realistic scenarios in which the different types of HVC neurons can interact to produce this behavior. The different networks highlight neural mechanisms that could potentially help to explain some aspects of combination sensitivity, including 1) interplay between inhibitory interneurons’ activity and the post inhibitory firing of the HVCX neurons enabled by T-type Ca2+ and H currents, 2) temporal summation of synaptic inputs at the TCS site of opposing signals that are time-and frequency- dependent, and 3) reciprocal inhibitory and excitatory loops as a potent mechanism to encode information over many milliseconds. The result is a plausible network model characterizing auditory processing in HVC. Our next step is to test the predictions of the model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=combination%20sensitivity" title="combination sensitivity">combination sensitivity</a>, <a href="https://publications.waset.org/abstracts/search?q=songbirds" title=" songbirds"> songbirds</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20networks" title=" neural networks"> neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=spatiotemporal%20integration" title=" spatiotemporal integration"> spatiotemporal integration</a> </p> <a href="https://publications.waset.org/abstracts/176725/neural-network-mechanisms-underlying-the-combination-sensitivity-property-in-the-hvc-of-songbirds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176725.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">65</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">3</span> Bacterial Diversity Reports Contamination around the Ichkeul Lake in Tunisia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Bourhane">Zeina Bourhane</a>, <a href="https://publications.waset.org/abstracts/search?q=Anders%20Lanzen"> Anders Lanzen</a>, <a href="https://publications.waset.org/abstracts/search?q=Christine%20Cagnon"> Christine Cagnon</a>, <a href="https://publications.waset.org/abstracts/search?q=Olfa%20Ben%20Said"> Olfa Ben Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Cristiana%20Cravo-Laureau"> Cristiana Cravo-Laureau</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20Duran"> Robert Duran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The anthropogenic pressure in coastal areas increases dramatically with the exploitation of environmental resources. Biomonitoring coastal areas are crucial to determine the impact of pollutants on bacterial communities in soils and sediments since they provide important ecosystem services. However, relevant biomonitoring tools allowing fast determination of the ecological status are yet to be defined. Microbial ecology approaches provide useful information for developing such microbial monitoring tools reporting on the effect of environmental stressors. Chemical and microbial molecular approaches were combined in order to determine microbial bioindicators for assessing the ecological status of soil and river ecosystems around the Ichkeul Lake (Tunisia), an area highly impacted by human activities. Samples were collected along soil/river/lake continuums in three stations around the Ichkeul Lake influenced by different human activities at two seasons (summer and winter). Contaminant pressure indexes (PI), including PAHs (Polycyclic aromatic hydrocarbons), alkanes, and OCPs (Organochlorine pesticides) contents, showed significant differences in the contamination level between the stations with seasonal variation. Bacterial communities were characterized by 16S ribosomal RNAs (rRNA) gene metabarcoding. Although microgAMBI indexes, determined from the sequencing data, were in accordance with contaminant contents, they were not sufficient to fully explain the PI. Therefore, further microbial indicators are still to be defined. The comparison of bacterial communities revealed the specific microbial assemblage for soil, river, and lake sediments, which were significantly correlated with contaminant contents and PI. Such observation offers the possibility to define a relevant set of bioindicators for reporting the effects of human activities on the microbial community structure. Such bioindicators might constitute useful monitoring tools for the management of microbial communities in coastal areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bacterial%20communities" title="bacterial communities">bacterial communities</a>, <a href="https://publications.waset.org/abstracts/search?q=biomonitoring" title=" biomonitoring"> biomonitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=contamination" title=" contamination"> contamination</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20impacts" title=" human impacts"> human impacts</a>, <a href="https://publications.waset.org/abstracts/search?q=microbial%20bioindicators" title=" microbial bioindicators"> microbial bioindicators</a> </p> <a href="https://publications.waset.org/abstracts/128638/bacterial-diversity-reports-contamination-around-the-ichkeul-lake-in-tunisia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/128638.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">164</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">2</span> Neural Networks Underlying the Generation of Neural Sequences in the HVC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Bou%20Diab">Zeina Bou Diab</a>, <a href="https://publications.waset.org/abstracts/search?q=Arij%20Daou"> Arij Daou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The neural mechanisms of sequential behaviors are intensively studied, with songbirds a focus for learned vocal production. We are studying the premotor nucleus HVC at a nexus of multiple pathways contributing to song learning and production. The HVC consists of multiple classes of neuronal populations, each has its own cellular, electrophysiological and functional properties. During singing, a large subset of motor cortex analog-projecting HVCRA neurons emit a single 6-10 ms burst of spikes at the same time during each rendition of song, a large subset of basal ganglia-projecting HVCX neurons fire 1 to 4 bursts that are similarly time locked to vocalizations, while HVCINT neurons fire tonically at average high frequency throughout song with prominent modulations whose timing in relation to song remains unresolved. This opens the opportunity to define models relating explicit HVC circuitry to how these neurons work cooperatively to control learning and singing. We developed conductance-based Hodgkin-Huxley models for the three classes of HVC neurons (based on the ion channels previously identified from in vitro recordings) and connected them in several physiologically realistic networks (based on the known synaptic connectivity and specific glutaminergic and gabaergic pharmacology) via different architecture patterning scenarios with the aim to replicate the in vivo firing patterning behaviors. We are able, through these networks, to reproduce the in vivo behavior of each class of HVC neurons, as shown by the experimental recordings. The different network architectures developed highlight different mechanisms that might be contributing to the propagation of sequential neural activity (continuous or punctate) in the HVC and to the distinctive firing patterns that each class exhibits during singing. Examples of such possible mechanisms include: 1) post-inhibitory rebound in HVCX and their population patterns during singing, 2) different subclasses of HVCINT interacting via inhibitory-inhibitory loops, 3) mono-synaptic HVCX to HVCRA excitatory connectivity, and 4) structured many-to-one inhibitory synapses from interneurons to projection neurons, and others. Replication is only a preliminary step that must be followed by model prediction and testing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computational%20modeling" title="computational modeling">computational modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20networks" title=" neural networks"> neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=temporal%20neural%20sequences" title=" temporal neural sequences"> temporal neural sequences</a>, <a href="https://publications.waset.org/abstracts/search?q=ionic%20currents" title=" ionic currents"> ionic currents</a>, <a href="https://publications.waset.org/abstracts/search?q=songbird" title=" songbird"> songbird</a> </p> <a href="https://publications.waset.org/abstracts/176727/neural-networks-underlying-the-generation-of-neural-sequences-in-the-hvc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176727.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">70</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">1</span> Identifying Apis millefera Strains in Akkar District (North Lebanon) Using Mitochondrial DNA: A Step in Preserving the Local Strain A. m. Syriaca </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeina%20Nasr">Zeina Nasr</a>, <a href="https://publications.waset.org/abstracts/search?q=Bashar%20Merheb"> Bashar Merheb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The honey bee is a social insect that had driven the human interest much more than any other organism. Beekeeping practices dated the appearance of Man on earth and now it provides a hobby or a secondary work that contributes to the family revenue and requires a little time engagement and money investment. Honey production is not the only contribution of honey bees to the economy, since honey bees play an important role in the pollination. Bee keeping in Lebanon is an important part of the agricultural economy. However, a growing concern about bees is spreading globally, due to an accelerated decline of bees colonies. This raises the alert to preserve and protect local bee strains against uncontrolled introduction of foreign strains and invasive parasitic species. Mitochondrial DNA (mtDNA) markers are commonly used in studying genetic variation in the Apis mellifera species. The DraI-COI-COII test is based on the analysis of the intergenic region between the two genes COI and COII. The different honey bee strains differ in the presence or absence of the p sequence and the number of Q sequences present. A. m. syriaca belonging to the lineage Z, is the native honey bee subspecies in Lebanon, Syria, Jordan, and Palestine. A. m. syriaca is known for its high defensiveness, even though it has many important advantages. However, commercial breeder strains, such as the Italian (A. m. ligustica), and Carniolan (A. m. carnica) strains, have been introduced by beekeepers and regularly used for honey production. This raises worries about the disappearance of the local subspecies. It is obvious that identifying A. m. syriaca colonies and protecting them against uncontrolled mating with other bee strains is a crucial step to protect and improve the original local strain. This study aims to reveal the existing sub-species of honey bee in Akkar – Lebanon and to assess the influence of introgression on the hybridization of the local strain. This will help to identify areas of pure A.m. syriaca population over this district to be considered in choosing syriaca reserves. We collected samples of bees from different regions of Akkar district in order to perform mtDNA analysis. We determined the restriction fragments length of the intergenic region COI-COII, using the restriction enzyme DraI. The results showed both the C and the Z lineages. Four restriction patterns were identified among the restriction maps of the studied samples. The most abundant mitochondrial lineage is the Z lineage constituting about 60% of the identified samples. Al-Dreib region reported the lowest introgression with foreign mtDNA of 21% making it the most suitable area for a genetic reserve of syriaca in Akkar based on its lowest introgression and suitable environment in addition to the attitude of local beekeepers to conserve the local strain. Finally, this study is the first step in constructing conservation programs for the preservation of the local strain and should be generalized to the whole Lebanese population, consistent with the effort done in neighboring countries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Akkar%20Lebanon" title="Akkar Lebanon">Akkar Lebanon</a>, <a href="https://publications.waset.org/abstracts/search?q=Apis%20millefera%20syriaca" title=" Apis millefera syriaca"> Apis millefera syriaca</a>, <a href="https://publications.waset.org/abstracts/search?q=DraI-COI-COII%20test" title=" DraI-COI-COII test"> DraI-COI-COII test</a>, <a href="https://publications.waset.org/abstracts/search?q=mitochondrial%20DNA" title=" mitochondrial DNA"> mitochondrial DNA</a> </p> <a href="https://publications.waset.org/abstracts/72542/identifying-apis-millefera-strains-in-akkar-district-north-lebanon-using-mitochondrial-dna-a-step-in-preserving-the-local-strain-a-m-syriaca" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72542.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">276</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 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