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technology</title> <meta name="description" content="Search results for: passive technology"> <meta name="keywords" content="passive technology"> <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 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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="passive technology"> <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> 8387</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: passive technology</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8387</span> Feasibility Analysis of Active and Passive Technical Integration of Rural Buildings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chanchan%20Liu">Chanchan Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the process of urbanization in China, the rapid development of urban construction has been achieved, but a large number of rural buildings still continue the construction mode many years ago. This paper mainly analyzes the rural residential buildings in the hot summer and cold winter regions analyze the active and passive technologies of the buildings. It explored the feasibility of realizing the sustainable development of rural buildings in an economically reasonable range, using mainly passive technologies, innovative building design methods, reducing the buildings’ demand for conventional energy, and supplementing them with renewable energy sources. On this basis, appropriate technology and regional characteristics are proposed to keep the rural architecture retain its characteristics in the development process. It is hoped that this exploration can provide reference and help for the development of rural buildings in the hot summer and cold winter regions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=the%20rural%20building" title="the rural building">the rural building</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20technology" title=" active technology"> active technology</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20technology" title=" passive technology"> passive technology</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title=" sustainable development "> sustainable development </a> </p> <a href="https://publications.waset.org/abstracts/97116/feasibility-analysis-of-active-and-passive-technical-integration-of-rural-buildings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97116.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">217</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">8386</span> The Prospective Assessment of Zero-Energy Dwellings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jovana%20Dj.%20Jovanovic">Jovana Dj. Jovanovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Svetlana%20M.%20Stevovic"> Svetlana M. Stevovic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The highest priority of so called, projected <em>passive houses</em> is to meet the appropriate energy demand. Every single material and layer which is injected into a dwelling has a certain energy quantity stored. The <em>passive houses</em> include optimized insulation levels with minimal thermal bridges, minimum of air leakage through the building, utilization of passive solar and internal gains, and good circulation of air which leans on mechanical ventilation system. The focus of this paper is on passive <em>house </em>features, benefits and targets, their feasibility and energy demands which are set up during each project. Numerous <em>passive house-standards</em> outline the very significant role of zero-energy dwellings towards the modern label of sustainable development. It is clear that the performance of both built and existing housing stock must be addressed if the population across the world sets out the energy objectives. This scientific article examines passive house features since the many passive house cases are launched. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benefits" title="benefits">benefits</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20demands" title=" energy demands"> energy demands</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20houses" title=" passive houses"> passive houses</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title=" sustainable development"> sustainable development</a> </p> <a href="https://publications.waset.org/abstracts/42382/the-prospective-assessment-of-zero-energy-dwellings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42382.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">337</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">8385</span> A Passive Reaction Force Compensation for a Linear Motor Motion Stage Using Pre-Compressed Springs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kim%20Duc%20Hoang">Kim Duc Hoang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyeong%20Joon%20Ahn"> Hyeong Joon Ahn</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Residual vibration of the system base due to a high-acceleration motion of a stage may reduce life and productivity of the manufacturing device. Although a passive RFC can reduce vibration of the system base, spring or dummy mass should be replaced to tune performance of the RFC. In this paper, we develop a novel concept of the passive RFC mechanism for a linear motor motion stage using pre-compressed springs. Dynamic characteristic of the passive RFC can be adjusted by pre-compression of the spring without exchanging the spring or dummy mass. First, we build a linear motor motion stage with pre-compressed springs. Then, the effect of the pre-compressed spring on the passive RFC is investigated by changing both pre-compressions and stiffness of springs. Finally, the effectiveness of the passive RFC using pre-compressed springs was verified with both simulations and experiments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linear%20motor%20motion%20stage" title="linear motor motion stage">linear motor motion stage</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20vibration" title=" residual vibration"> residual vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20RFC" title=" passive RFC"> passive RFC</a>, <a href="https://publications.waset.org/abstracts/search?q=pre-compressed%20spring" title=" pre-compressed spring"> pre-compressed spring</a> </p> <a href="https://publications.waset.org/abstracts/63341/a-passive-reaction-force-compensation-for-a-linear-motor-motion-stage-using-pre-compressed-springs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63341.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">354</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">8384</span> Dilation Effect on 3D Passive Earth Pressure Coefficients for Retaining Wall </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khelifa%20Tarek">Khelifa Tarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Benmebarek%20Sadok"> Benmebarek Sadok</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The 2D passive earth pressures acting on rigid retaining walls problem has been widely treated in the literature using different approaches (limit equilibrium, limit analysis, slip line and numerical computation), however, the 3D passive earth pressures problem has received less attention. This paper is concerned with the numerical study of 3D passive earth pressures induced by the translation of a rigid rough retaining wall for associated and non-associated soils. Using the explicit finite difference code FLAC3D, the increase of the passive earth pressures due to the decrease of the wall breadth is investigated. The results given by the present numerical analysis are compared with other investigation. The influence of the angle of dilation on the coefficients is also studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20modeling" title="numerical modeling">numerical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=FLAC3D" title=" FLAC3D"> FLAC3D</a>, <a href="https://publications.waset.org/abstracts/search?q=retaining%20wall" title=" retaining wall"> retaining wall</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20earth%20pressures" title=" passive earth pressures"> passive earth pressures</a>, <a href="https://publications.waset.org/abstracts/search?q=angle%20of%20dilation" title=" angle of dilation"> angle of dilation</a> </p> <a href="https://publications.waset.org/abstracts/33167/dilation-effect-on-3d-passive-earth-pressure-coefficients-for-retaining-wall" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33167.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">324</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">8383</span> Development of Application Architecture for RFID Based Indoor Tracking Using Passive RFID Tag</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sumaya%20Ismail">Sumaya Ismail</a>, <a href="https://publications.waset.org/abstracts/search?q=Aijaz%20Ahmad%20Rehi"> Aijaz Ahmad Rehi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Abstract The location tracking and positioning systems have technologically grown exponentially in recent decade. In particular, Global Position system (GPS) has become a universal norm to be a part of almost every software application directly or indirectly for the location based modules. However major drawback of GPS based system is their inability of working in indoor environments. Researchers are thus focused on the alternative technologies which can be used in indoor environments for a vast range of application domains which require indoor location tracking. One of the most popular technology used for indoor tracking is radio frequency identification (RFID). Due to its numerous advantages, including its cost effectiveness, it is considered as a technology of choice in indoor location tracking systems. To contribute to the emerging trend of the research, this paper proposes an application architecture of passive RFID tag based indoor location tracking system. For the proof of concept, a test bed will be developed to in this study. In addition, various indoor location tracking algorithms will be used to assess their appropriateness in the proposed application architecture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RFID" title="RFID">RFID</a>, <a href="https://publications.waset.org/abstracts/search?q=GPS" title=" GPS"> GPS</a>, <a href="https://publications.waset.org/abstracts/search?q=indoor%20location%20tracking" title=" indoor location tracking"> indoor location tracking</a>, <a href="https://publications.waset.org/abstracts/search?q=application%20architecture" title=" application architecture"> application architecture</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20RFID%20tag" title=" passive RFID tag"> passive RFID tag</a> </p> <a href="https://publications.waset.org/abstracts/164777/development-of-application-architecture-for-rfid-based-indoor-tracking-using-passive-rfid-tag" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164777.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">117</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">8382</span> Insight on Passive Design for Energy Efficiency in Commercial Building for Hot and Humid Climate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aravind%20J.">Aravind J.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive design can be referred to a way of designing buildings that takes advantage of the prevailing climate and natural energy resources. Which will be a key to reduce the increasing energy usage in commercial buildings. Most of the small scale commercial buildings made are merely a thermal mass inbuilt with active systems to bring lively conditions. By bringing the passive design strategies for energy efficiency in commercial buildings will reduce the usage of active systems. Thus the energy usage can be controlled through analysis of daylighting and improved living conditions in the indoor spaces by using passive techniques. And comparative study on different passive design systems and conventional methods will be approached for commercial buildings in hot and humid region. Possible effects of existing risks implied with solution for those problems is also a part of the paper. The result will be carried on with the design programme to prove the workability of the strategies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=passive%20design" title="passive design">passive design</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title=" energy efficiency"> energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=commercial%20buildings" title=" commercial buildings"> commercial buildings</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20and%20humid%20climate" title=" hot and humid climate"> hot and humid climate</a> </p> <a href="https://publications.waset.org/abstracts/82003/insight-on-passive-design-for-energy-efficiency-in-commercial-building-for-hot-and-humid-climate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82003.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">368</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">8381</span> Controlling Interactions and Non-Equilibrium Steady State in Spinning Active Matter Monolayers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joshua%20Paul%20Steimel">Joshua Paul Steimel</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20Pappas"> Michael Pappas</a>, <a href="https://publications.waset.org/abstracts/search?q=Ethan%20Hall"> Ethan Hall</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Particle-particle interactions are critical in determining the state of an active matter system. Unique and ubiquitous non-equilibrium behavior like swarming, vortexing, spiraling, and much more is governed by interactions between active units or particles. In hybrid active-passive matter systems, the attraction between spinning active units in a 2D monolayer of passive particles is controlled by the mechanical behavior of the passive monolayer. We demonstrate here that the range and dynamics of this attraction can be controlled by changing the composition of the passive monolayer by adding dopant passive particles. These dopant passive particles effectively pin the movement of dislocation motion in the passive media and reduce the probability of defect motion required to erode the bridge of passive particles between active spinners, thus reducing the range of attraction. Additionally, by adding an out of plane component to the magnetic moment and creating a top-like motion a short range repulsion emerges between the top-like particle. At inter-top distances less than four particle diameters apart, the tops repel but beyond that, distance attract up to 13 particle diameters apart. The tops were also able to locally and transiently anneal the passive monolayer. Thus we demonstrate that by tuning several parameters of the hybrid active matter system, one can observe very different emergent behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20matter" title="active matter">active matter</a>, <a href="https://publications.waset.org/abstracts/search?q=colloids" title=" colloids"> colloids</a>, <a href="https://publications.waset.org/abstracts/search?q=ferromagnetic" title=" ferromagnetic"> ferromagnetic</a>, <a href="https://publications.waset.org/abstracts/search?q=annealing" title=" annealing"> annealing</a> </p> <a href="https://publications.waset.org/abstracts/155350/controlling-interactions-and-non-equilibrium-steady-state-in-spinning-active-matter-monolayers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155350.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">110</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">8380</span> Experimental Study of Reflective Roof as a Passive Cooling Method in Homes Under the Paradigm of Appropriate Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Javier%20Ascanio%20Villabona">Javier Ascanio Villabona</a>, <a href="https://publications.waset.org/abstracts/search?q=Brayan%20Eduardo%20Tarazona%20Romero"> Brayan Eduardo Tarazona Romero</a>, <a href="https://publications.waset.org/abstracts/search?q=Camilo%20Leonardo%20Sandoval%20Rodriguez"> Camilo Leonardo Sandoval Rodriguez</a>, <a href="https://publications.waset.org/abstracts/search?q=Arly%20Dario%20Rincon"> Arly Dario Rincon</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Lengerke%20Perez"> Omar Lengerke Perez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Efficient energy consumption in the housing sector in relation to refrigeration is a concern in the construction and rehabilitation of houses in tropical areas. Thermal comfort is aggravated by heat gain on the roof surface by heat gains. Thus, in the group of passive cooling techniques, one of the practices and technologies in solar control that provide improvements in comfortable conditions are thermal insulation or geometric changes of the roofs. On the other hand, methods with reflection and radiation are the methods used to decrease heat gain by facilitating the removal of excess heat inside a building to maintain a comfortable environment. Since the potential of these techniques varies in different climatic zones, their application in different zones should be examined. This research is based on the experimental study of a prototype of a roof radiator as a method of passive cooling in homes, which was developed through an experimental research methodology making measurements in a prototype built by means of the paradigm of appropriate technology, with the aim of establishing an initial behavior of the internal temperature resulting from the climate of the external environment. As a starting point, a selection matrix was made to identify the typologies of passive cooling systems to model the system and its subsequent implementation, establishing its constructive characteristics. Step followed by the measurement of the climatic variables (outside the prototype) and microclimatic variables (inside the prototype) to obtain a database to be analyzed. As a final result, the decrease in temperature that occurs inside the chamber with respect to the outside temperature was evidenced. likewise, a linearity in its behavior in relation to the variations of the climatic variables. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=appropriate%20technology" title="appropriate technology">appropriate technology</a>, <a href="https://publications.waset.org/abstracts/search?q=enveloping" title=" enveloping"> enveloping</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title=" energy efficiency"> energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20cooling" title=" passive cooling"> passive cooling</a> </p> <a href="https://publications.waset.org/abstracts/154055/experimental-study-of-reflective-roof-as-a-passive-cooling-method-in-homes-under-the-paradigm-of-appropriate-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154055.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">94</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">8379</span> Dry Friction Occurring in the Suspensions for Passive and Switchable Damper Systems and Its Effect on Ride Comfort</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aref%20M.%20A.%20Soliman">Aref M. A. Soliman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20A.%20Hassan"> Mahmoud A. Hassan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In all vehicle suspension, there is a dry friction. One of the various active suspensions, which have been shown to have considerable practical potential, is a switchable damper suspension system. In this paper, vehicle ride comfort for the passive and switchable damper suspension systems as affected by the value of frictional force generated in springs is discussed. A mathematical model of a quarter vehicle model for two setting switchable damper suspension system with dry friction force is developed to evaluate vehicle ride comfort in terms of suspension performance criteria. The vehicle itself is treated as a rigid body undergoing vertical motions. Comparisons between passive and switchable damper suspensions systems with dry friction force in terms of ride performance are also discussed. The results showed that the ride comfort for the passive and switchable damper suspension systems was deteriorated due to dry friction occurring in the suspensions. The two setting switchable damper with and without dry friction force gives better ride improvements compared with the passive suspension system. Also, the obtained results show an optimum value of damping ratio of the passive suspension system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ride%20comfort" title="ride comfort">ride comfort</a>, <a href="https://publications.waset.org/abstracts/search?q=dry%20friction" title=" dry friction"> dry friction</a>, <a href="https://publications.waset.org/abstracts/search?q=switchable%20damper" title=" switchable damper"> switchable damper</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20suspension" title=" passive suspension"> passive suspension</a> </p> <a href="https://publications.waset.org/abstracts/82923/dry-friction-occurring-in-the-suspensions-for-passive-and-switchable-damper-systems-and-its-effect-on-ride-comfort" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82923.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">372</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">8378</span> Seismic Response Control of 20-Storey Benchmark Building Using True Negative Stiffness Device</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asim%20Qureshi">Asim Qureshi</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20S.%20Jangid"> R. S. Jangid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Seismic response control of structures is generally achieved by using control devices which either dissipate the input energy or modify the dynamic properties of structure.In this paper, the response of a 20-storey benchmark building supplemented by viscous dampers and Negative Stiffness Device (NSD) is assessed by numerical simulations using the Newmark-beta method. True negative stiffness is an adaptive passive device which assists the motion unlike positive stiffness. The structure used in this study is subjected to four standard ground motions varying from moderate to severe, near fault to far-field earthquakes. The objective of the present study is to show the effectiveness of the adaptive negative stiffness device (NSD and passive dampers together) relative to passive dampers alone. This is done by comparing the responses of the above uncontrolled structure (i.e., without any device) with the structure having passive dampers only and also with the structure supplemented with adaptive negative stiffness device. Various performance indices, top floor displacement, top floor acceleration and inter-storey drifts are used as comparison parameters. It is found that NSD together with passive dampers is quite effective in reducing the response of aforementioned structure relative to structure without any device or passive dampers only. Base shear and acceleration is reduced significantly by incorporating NSD at the cost of increased inter-storey drifts which can be compensated using the passive dampers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20negative%20stiffness%20device" title="adaptive negative stiffness device">adaptive negative stiffness device</a>, <a href="https://publications.waset.org/abstracts/search?q=apparent%20yielding" title=" apparent yielding"> apparent yielding</a>, <a href="https://publications.waset.org/abstracts/search?q=NSD" title=" NSD"> NSD</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20dampers" title=" passive dampers"> passive dampers</a> </p> <a href="https://publications.waset.org/abstracts/27228/seismic-response-control-of-20-storey-benchmark-building-using-true-negative-stiffness-device" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27228.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">432</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">8377</span> Application of Sorptive Passive Panels for Reducing Indoor Formaldehyde Level: Effect of Environmental Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mitra%20Bahri">Mitra Bahri</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean%20Leopold%20Kabambi"> Jean Leopold Kabambi</a>, <a href="https://publications.waset.org/abstracts/search?q=Jacqueline%20Yakobi-Hancock"> Jacqueline Yakobi-Hancock</a>, <a href="https://publications.waset.org/abstracts/search?q=William%20Render"> William Render</a>, <a href="https://publications.waset.org/abstracts/search?q=Stephanie%20So"> Stephanie So</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Reducing formaldehyde concentration in residential buildings is an important challenge, especially during the summer. In this study, a ceiling tile was used as a sorptive passive panel for formaldehyde removal. The performance of this passive panel was evaluated under different environmental conditions. The results demonstrated that the removal efficiency is comprised between 40% and 71%. Change in the level of relative humidity (30%, 50%, and 75%) had a slight positive effect on the sorption capacity. However, increase in temperature from 21 °C to 26 °C led to approximately 7% decrease in the average formaldehyde removal performance. GC/MS and HPLC analysis revealed the formation of different by-products at low concentrations under extreme environmental conditions. These findings suggest that the passive panel selected for this study holds the potential to be used for formaldehyde removal under various conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=formaldehyde" title="formaldehyde">formaldehyde</a>, <a href="https://publications.waset.org/abstracts/search?q=indoor%20air%20quality" title=" indoor air quality"> indoor air quality</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20panel" title=" passive panel"> passive panel</a>, <a href="https://publications.waset.org/abstracts/search?q=removal%20efficiency" title=" removal efficiency"> removal efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=sorption" title=" sorption"> sorption</a> </p> <a href="https://publications.waset.org/abstracts/95496/application-of-sorptive-passive-panels-for-reducing-indoor-formaldehyde-level-effect-of-environmental-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95496.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">210</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">8376</span> Passive Solar Techniques to Improve Thermal Comfort and Reduce Energy Consumption of Domestic Use</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naci%20Kalkan">Naci Kalkan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ihsan%20Dagtekin"> Ihsan Dagtekin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive design responds to improve indoor thermal comfort and minimize the energy consumption. The present research analyzed the how efficiently passive solar technologies generate heating and cooling and provide the system integration for domestic applications. In addition to this, the aim of this study is to increase the efficiency of solar systems system with integration some innovation and optimization. As a result, outputs of the project might start a new sector to provide environmentally friendly and cheap cooling for domestic use. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=passive%20solar%20systems" title="passive solar systems">passive solar systems</a>, <a href="https://publications.waset.org/abstracts/search?q=heating" title=" heating"> heating</a>, <a href="https://publications.waset.org/abstracts/search?q=cooling" title=" cooling"> cooling</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20comfort" title=" thermal comfort"> thermal comfort</a>, <a href="https://publications.waset.org/abstracts/search?q=ventilation%20systems" title=" ventilation systems"> ventilation systems</a> </p> <a href="https://publications.waset.org/abstracts/49506/passive-solar-techniques-to-improve-thermal-comfort-and-reduce-energy-consumption-of-domestic-use" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49506.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">299</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">8375</span> Various Perspectives for the Concept of the Emotion Labor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jae%20Soo%20Do">Jae Soo Do</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyoung-Seok%20Kim"> Kyoung-Seok Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Radical changes in the industrial environment, and spectacular developments of IT have changed the current of managements from people-centered to technology- or IT-centered. Interpersonal emotion exchanges have long become insipid and interactive services have also come as mechanical reactions. This study offers various concepts for the emotional labor based on traditional studies on emotional labor. Especially the present day, on which human emotions are subject to being served as machinized thing, is the time when the study on human emotions comes momentous. Precedent researches on emotional labors commonly and basically dealt with the relationship between the active group who performs actions and the passive group who is done with the action. This study focuses on the passive group and tries to offer a new perspective of 'liquid emotion' as a defence mechanism for the passive group from the external environment. Especially, this addresses a concrete discussion on directions of following studies on the liquid labor as a newly suggested perspective. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=emotion%20labor" title="emotion labor">emotion labor</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20acting" title=" surface acting"> surface acting</a>, <a href="https://publications.waset.org/abstracts/search?q=deep%20acting" title=" deep acting"> deep acting</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20emotion" title=" liquid emotion"> liquid emotion</a> </p> <a href="https://publications.waset.org/abstracts/68091/various-perspectives-for-the-concept-of-the-emotion-labor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68091.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">346</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">8374</span> Health of Riveted Joints with Active and Passive Structural Health Monitoring Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Javad%20Yarmahmoudi">Javad Yarmahmoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Mirzaee"> Alireza Mirzaee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many active and passive structural health monitoring (SHM) techniques have been developed for detection of the defects of plates. Generally, riveted joints hold the plates together and their failure may create accidents. In this study, well known active and passive methods were modified for the evaluation of the health of the riveted joints between the plates. The active method generated Lamb waves and monitored their propagation by using lead zirconate titanate (PZT) disks. The signal was analyzed by using the wavelet transformations. The passive method used the Fiber Bragg Grating (FBG) sensors and evaluated the spectral characteristics of the signals by using Fast Fourier Transformation (FFT). The results indicated that the existing methods designed for the evaluation of the health of individual plates may be used for inspection of riveted joints with software modifications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=structural%20health%20monitoring" title="structural health monitoring">structural health monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=SHM" title=" SHM"> SHM</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20SHM" title=" active SHM"> active SHM</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20SHM" title=" passive SHM"> passive SHM</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20bragg%20grating%20sensor" title=" fiber bragg grating sensor"> fiber bragg grating sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=lead%20zirconate%20titanate" title=" lead zirconate titanate"> lead zirconate titanate</a>, <a href="https://publications.waset.org/abstracts/search?q=PZT" title=" PZT"> PZT</a> </p> <a href="https://publications.waset.org/abstracts/33235/health-of-riveted-joints-with-active-and-passive-structural-health-monitoring-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33235.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">327</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">8373</span> Evaluation of Heating/Cooling Potential of a Passive Building</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Jamil%20Ahmad">M. Jamil Ahmad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the heating/cooling potential of a passive building (mosque) of Prof. K. A. Nizami center for Quranic studies at AMU Aligarh, has been evaluated on the basis of energy balance under quasi-steady state condition by incorporating the effect of ventilation. The study has been carried out for composite climate of Aligarh. The performance of the above mentioned building has been presented in this study. It is observed that the premises of the mosque are cooler than the outside ambient temperature by an average of 2°C and 4°C during the month of March and April respectively. Provision of excellent ventilation, high amount of thermal mass, high ceilings and circulation of cool natural air helps in maintaining an optimal thermal comfort temperature in the passive building. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heating%2Fcooling%20potential" title="heating/cooling potential">heating/cooling potential</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20building" title=" passive building"> passive building</a>, <a href="https://publications.waset.org/abstracts/search?q=ambient%20temperatures" title=" ambient temperatures"> ambient temperatures</a> </p> <a href="https://publications.waset.org/abstracts/84926/evaluation-of-heatingcooling-potential-of-a-passive-building" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84926.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">388</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">8372</span> On Voice in English: An Awareness Raising Attempt on Passive Voice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meral%20Melek%20Unver">Meral Melek Unver</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper aims to explore ways to help English as a Foreign Language (EFL) learners notice and revise voice in English and raise their awareness of when and how to use active and passive voice to convey meaning in their written and spoken work. Because passive voice is commonly preferred in certain genres such as academic essays and news reports, despite the current trends promoting active voice, it is essential for learners to be fully aware of the meaning, use and form of passive voice to better communicate. The participants in the study are 22 EFL learners taking a one-year intensive English course at a university, who will receive English medium education (EMI) in their departmental studies in the following academic year. Data from students’ written and oral work was collected over a four-week period and the misuse or inaccurate use of passive voice was identified. The analysis of the data proved that they failed to make sensible decisions about when and how to use passive voice partly because the differences between their mother tongue and English and because they were not aware of the fact that active and passive voice would not alternate all the time. To overcome this, a Test-Teach-Test shape lesson, as opposed to a Present-Practice-Produce shape lesson, was designed and implemented to raise their awareness of the decisions they needed to make in choosing the voice and help them notice the meaning and use of passive voice through concept checking questions. The results first suggested that awareness raising activities on the meaning and use of voice in English would be beneficial in having accurate and meaningful outcomes from students. Also, helping students notice and renotice passive voice through carefully designed activities would help them internalize the use and form of it. As a result of the study, a number of activities are suggested to revise and notice passive voice as well as a short questionnaire to help EFL teachers to self-reflect on their teaching. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=voice%20in%20English" title="voice in English">voice in English</a>, <a href="https://publications.waset.org/abstracts/search?q=test-teach-test" title=" test-teach-test"> test-teach-test</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20voice" title=" passive voice"> passive voice</a>, <a href="https://publications.waset.org/abstracts/search?q=English%20language%20teaching" title=" English language teaching "> English language teaching </a> </p> <a href="https://publications.waset.org/abstracts/71895/on-voice-in-english-an-awareness-raising-attempt-on-passive-voice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71895.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">222</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">8371</span> 316L Passive Film Modification During Pitting Corrosion Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amina%20Sriba">Amina Sriba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, interactions between the chemical elements forming the passive film of welded austenitic stainless steel during pitting corrosion are studied. We pay special attention to the chemical elements chromium, molybdenum, iron, nickel, and silicon since they make up the passive film that covers the fusion zone's surface in the welded joint. Molybdenum and chromium are typically the two essential components that control the three crucial stages of pit formation. It was found that while the involvement of chromium is more prominent during the propagation of a pit that has already begun, the enrichment of the molybdenum element in the passive film becomes apparent from the first stage of pit initiation. Additionally, during the pitting corrosion process, there was a noticeable fluctuation in the quantities of the produced oxides and hydroxide species from zone to zone. Regarding the formed hydroxide species, we clearly see that Nickel hydroxides are added to those of Chromium to constitute the outer layer in the passive film of the fusion zone sample, compared to the base metal sample, where only Chromium hydroxide formed on its surface during the pitting corrosion process. This reaction is caused by the preferential dissolution of the austenite phase instead of ferrite in the fusion zone. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fusion%20zone" title="fusion zone">fusion zone</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20film" title=" passive film"> passive film</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20elements" title=" chemical elements"> chemical elements</a>, <a href="https://publications.waset.org/abstracts/search?q=pit" title=" pit"> pit</a> </p> <a href="https://publications.waset.org/abstracts/186833/316l-passive-film-modification-during-pitting-corrosion-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186833.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">53</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">8370</span> Passive Non-Prehensile Manipulation on Helix Path Based on Mechanical Intelligence</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdullah%20Bajelan">Abdullah Bajelan</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Akbarimajd"> Adel Akbarimajd</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Object manipulation techniques in robotics can be categorized in two major groups including manipulation with grasp and manipulation without grasp. The original aim of this paper is to develop an object manipulation method where in addition to being grasp-less, the manipulation task is done in a passive approach. In this method, linear and angular positions of the object are changed and its manipulation path is controlled. The manipulation path is a helix track with constant radius and incline. The method presented in this paper proposes a system which has not the actuator and the active controller. So this system requires a passive mechanical intelligence to convey the object from the status of the source along the specified path to the goal state. This intelligent is created based on utilizing the geometry of the system components. A general set up for the components of the system is considered to satisfy the required conditions. Then after kinematical analysis, detailed dimensions and geometry of the mechanism is obtained. The kinematical results are verified by simulation in ADAMS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mechanical%20intelligence" title="mechanical intelligence">mechanical intelligence</a>, <a href="https://publications.waset.org/abstracts/search?q=object%20manipulation" title=" object manipulation"> object manipulation</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20mechanism" title=" passive mechanism"> passive mechanism</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20non-prehensile%20manipulation" title=" passive non-prehensile manipulation"> passive non-prehensile manipulation</a> </p> <a href="https://publications.waset.org/abstracts/11209/passive-non-prehensile-manipulation-on-helix-path-based-on-mechanical-intelligence" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11209.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">482</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">8369</span> Passive Voice in SLA: Armenian Learners’ Case Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emma%20Nemishalyan">Emma Nemishalyan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is believed that learners’ mother tongue (L1 hereafter) has a huge impact on their second language acquisition (L2 hereafter). This hypothesis has been exposed to both positive and negative criticism. Based on research results of a wide range of learners’ corpora (Chinese, Japanese, Spanish among others) the hypothesis has either been proved or disproved. However, no such study has been conducted on the Armenian learners. The aim of this paper is to understand the implication of the hypothesis on the Armenian learners’ corpus in terms of the use of the passive voice. To this end, the method of Contrastive Interlanguage Analysis (hereafter CIA) has been used on native speakers’ corpus (Louvain Corpus of Native English Essays (LOCNESS)) and Armenian learners’ corpus which has been compiled by me in compliance with International Corpus of Learner English (ICLE) guidelines. CIA compares the interlanguage (the language produced by learners) with the one produced by native speakers. With the help of this method, it is possible not only to highlight the mistakes that learners make, but also to underline the under or overuses. The choice of the grammar issue (passive voice) is conditioned by the fact that typologically Armenian and English are drastically different as they belong to different branches. Moreover, the passive voice is considered to be one of the most problematic grammar topics to be acquired by learners of the English language. Based on this difference, we hypothesized that Armenian learners would either overuse or underuse some types of the passive voice. With the help of Lancsbox software, we have identified the frequency rates of passive voice usage in LOCNESS and Armenian learners’ corpus to understand whether the latter have the same usage pattern of the passive voice as the native speakers. Secondly, we have identified the types of the passive voice used by the Armenian leaners trying to track down the reasons in their mother tongue. The results of the study showed that Armenian learners underused the passive voices in contrast to native speakers. Furthermore, the hypothesis that learners’ L1 has an impact on learners’ L2 acquisition and production was proved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corpus%20linguistics" title="corpus linguistics">corpus linguistics</a>, <a href="https://publications.waset.org/abstracts/search?q=applied%20linguistics" title=" applied linguistics"> applied linguistics</a>, <a href="https://publications.waset.org/abstracts/search?q=second%20language%20acquisition" title=" second language acquisition"> second language acquisition</a>, <a href="https://publications.waset.org/abstracts/search?q=corpus%20compilation" title=" corpus compilation"> corpus compilation</a> </p> <a href="https://publications.waset.org/abstracts/165348/passive-voice-in-sla-armenian-learners-case-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165348.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">109</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">8368</span> Integrated Passive Cooling Systems for Tropical Residential Buildings: A Review through the Lens of Latent Heat Assessment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=O.%20Eso">O. Eso</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mohammadi"> M. Mohammadi</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Darkwa"> J. Darkwa</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Calautit"> J. Calautit</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Residential buildings are responsible for 22% of the global end-use energy demand and 17% of global CO₂ emissions. Tropical climates particularly present higher latent heat gains, leading to more cooling loads. However, the cooling processes are all based on conventional mechanical air conditioning systems which are energy and carbon intensive technologies. Passive cooling systems have in the past been considered as alternative technologies for minimizing energy consumption in buildings. Nevertheless, replacing mechanical cooling systems with passive ones will require a careful assessment of the passive cooling system heat transfer to determine if suitable to outperform their conventional counterparts. This is because internal heat gains, indoor-outdoor heat transfer, and heat transfer through envelope affects the performance of passive cooling systems. While many studies have investigated sensible heat transfer in passive cooling systems, not many studies have focused on their latent heat transfer capabilities. Furthermore, combining heat prevention, heat modulation and heat dissipation to passively cool indoor spaces in the tropical climates is critical to achieve thermal comfort. Since passive cooling systems use only one of these three approaches at a time, integrating more than one passive cooling system for effective indoor latent heat removal while still saving energy is studied. This study is a systematic review of recently published peer review journals on integrated passive cooling systems for tropical residential buildings. The missing links in the experimental and numerical studies with regards to latent heat reduction interventions are presented. Energy simulation studies of integrated passive cooling systems in tropical residential buildings are also discussed. The review has shown that comfortable indoor environment is attainable when two or more passive cooling systems are integrated in tropical residential buildings. Improvement occurs in the heat transfer rate and cooling performance of the passive cooling systems when thermal energy storage systems like phase change materials are included. Integrating passive cooling systems in tropical residential buildings can reduce energy consumption by 6-87% while achieving up to 17.55% reduction in indoor heat flux. The review has highlighted a lack of numerical studies regarding passive cooling system performance in tropical savannah climates. In addition, detailed studies are required to establish suitable latent heat transfer rate in passive cooling ventilation devices under this climate category. This should be considered in subsequent studies. The conclusions and outcomes of this study will help researchers understand the overall energy performance of integrated passive cooling systems in tropical climates and help them identify and design suitable climate specific options for residential buildings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20savings" title="energy savings">energy savings</a>, <a href="https://publications.waset.org/abstracts/search?q=latent%20heat" title=" latent heat"> latent heat</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20cooling%20systems" title=" passive cooling systems"> passive cooling systems</a>, <a href="https://publications.waset.org/abstracts/search?q=residential%20buildings" title=" residential buildings"> residential buildings</a>, <a href="https://publications.waset.org/abstracts/search?q=tropical%20residential%20buildings" title=" tropical residential buildings"> tropical residential buildings</a> </p> <a href="https://publications.waset.org/abstracts/137580/integrated-passive-cooling-systems-for-tropical-residential-buildings-a-review-through-the-lens-of-latent-heat-assessment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/137580.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">149</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">8367</span> Design of Bidirectional Wavelength Division Multiplexing Passive Optical Network in Optisystem Environment </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashiq%20Hussain">Ashiq Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahwash%20Hussain"> Mahwash Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeenat%20Parveen"> Zeenat Parveen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Now a days the demand for broadband service has increased. Due to which the researchers are trying to find a solution to provide a large amount of service. There is a shortage of bandwidth because of the use of downloading video, voice and data. One of the solutions to overcome this shortage of bandwidth is to provide the communication system with passive optical components. We have increased the data rate in this system. From experimental results we have concluded that the quality factor has increased by adding passive optical networks. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=WDM-PON" title="WDM-PON">WDM-PON</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20fiber" title=" optical fiber"> optical fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=BER" title=" BER"> BER</a>, <a href="https://publications.waset.org/abstracts/search?q=Q-factor" title=" Q-factor"> Q-factor</a>, <a href="https://publications.waset.org/abstracts/search?q=eye%20diagram" title=" eye diagram"> eye diagram</a> </p> <a href="https://publications.waset.org/abstracts/17412/design-of-bidirectional-wavelength-division-multiplexing-passive-optical-network-in-optisystem-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17412.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">510</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">8366</span> Flexible Integration of Airbag Weakening Lines in Interior Components: Airbag Weakening with Jenoptik Laser Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Markus%20Remm">Markus Remm</a>, <a href="https://publications.waset.org/abstracts/search?q=Sebastian%20Dienert"> Sebastian Dienert</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vehicle interiors are not only changing in terms of design and functionality but also due to new driving situations in which, for example, autonomous operating modes are possible. Flexible seating positions are changing the requirements for passive safety system behavior and location in the interior of a vehicle. With fully autonomous driving, the driver can, for example, leave the position behind the steering wheel and take a seated position facing backward. Since autonomous and non-autonomous vehicles will share the same road network for the foreseeable future, accidents cannot be avoided, which makes the use of passive safety systems indispensable. With JENOPTIK-VOTAN® A technology, the trend towards flexible predetermined airbag weakening lines is enabled. With the help of laser beams, the predetermined weakening lines are introduced from the backside of the components so that they are absolutely invisible. This machining process is sensor-controlled and guarantees that a small residual wall thickness remains for the best quality and reliability for airbag weakening lines. Due to the wide processing range of the laser, the processing of almost all materials is possible. A CO₂ laser is used for many plastics, natural fiber materials, foams, foils and material composites. A femtosecond laser is used for natural materials and textiles that are very heat-sensitive. This laser type has extremely short laser pulses with very high energy densities. Supported by a high-precision and fast movement of the laser beam by a laser scanner system, the so-called cold ablation is enabled to predetermine weakening lines layer by layer until the desired residual wall thickness remains. In that way, for example, genuine leather can be processed in a material-friendly and process-reliable manner without design implications to the components A-Side. Passive safety in the vehicle is increased through the interaction of modern airbag technology and high-precision laser airbag weakening. The JENOPTIK-VOTAN® A product family has been representing this for more than 25 years and is pointing the way to the future with new and innovative technologies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20freedom" title="design freedom">design freedom</a>, <a href="https://publications.waset.org/abstracts/search?q=interior%20material%20processing" title=" interior material processing"> interior material processing</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20technology" title=" laser technology"> laser technology</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20safety" title=" passive safety"> passive safety</a> </p> <a href="https://publications.waset.org/abstracts/157323/flexible-integration-of-airbag-weakening-lines-in-interior-components-airbag-weakening-with-jenoptik-laser-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157323.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">121</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">8365</span> Domestic and Foreign Terrorism: Evaluation of the Breeding Ground</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=T.%20K.%20Hung">T. K. Hung</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Terrorism acts have occurred across both developed and developing states, with well-identified motivation and causes. For many years, terrorism eradication has become a major topic yet only passive actions were taken in response to acts. The linkage between the location of terrorism occurrence and breeding ground is not well-documented, resulting in the passive approach used in counter-terrorism nowadays. The evaluation investigates all post-9/11 terrorism affairs considering their state capacity, safety, ease of border access control, religion diversity, and technology access, to measure the level of breeding ground of the states. Those "weak" states with poor border access control, resources capacity and domestic safety are the best breeding ground for terrorists. Although many attacks were caused by religious motivation, religion diversity does not predict the breeding ground. States with censored technology access, particular computer-mediated communication, predict on the terrorism breeding ground, moderated by the level of breeding ground of neighboring states. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=counter-terrorism" title="counter-terrorism">counter-terrorism</a>, <a href="https://publications.waset.org/abstracts/search?q=lethality" title=" lethality"> lethality</a>, <a href="https://publications.waset.org/abstracts/search?q=security" title=" security"> security</a>, <a href="https://publications.waset.org/abstracts/search?q=terrorism" title=" terrorism"> terrorism</a> </p> <a href="https://publications.waset.org/abstracts/61656/domestic-and-foreign-terrorism-evaluation-of-the-breeding-ground" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61656.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">340</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">8364</span> Discrete Swarm with Passive Congregation for Cost Minimization of the Multiple Vehicle Routing Problem</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tarek%20Aboueldahab">Tarek Aboueldahab</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20Farag"> Hanan Farag</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cost minimization of Multiple Vehicle Routing Problem becomes a critical issue in the field of transportation because it is NP-hard optimization problem and the search space is complex. Many researches use the hybridization of artificial intelligence (AI) models to solve this problem; however, it can not guarantee to reach the best solution due to the difficulty of searching the whole search space. To overcome this problem, we introduce the hybrid model of Discrete Particle Swarm Optimization (DPSO) with a passive congregation which enable searching the whole search space to compromise between both local and global search. The practical experiment shows that our model obviously outperforms other hybrid models in cost minimization. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cost%20minimization" title="cost minimization">cost minimization</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-vehicle%20routing%20problem" title=" multi-vehicle routing problem"> multi-vehicle routing problem</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20congregation" title=" passive congregation"> passive congregation</a>, <a href="https://publications.waset.org/abstracts/search?q=discrete%20swarm" title=" discrete swarm"> discrete swarm</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20congregation" title=" passive congregation"> passive congregation</a> </p> <a href="https://publications.waset.org/abstracts/157025/discrete-swarm-with-passive-congregation-for-cost-minimization-of-the-multiple-vehicle-routing-problem" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157025.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">98</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">8363</span> Space Time Adaptive Algorithm in Bi-Static Passive Radar Systems for Clutter Mitigation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20Venu">D. Venu</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20V.%20Koteswara%20Rao"> N. V. Koteswara Rao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Space – time adaptive processing (STAP) is an effective tool for detecting a moving target in spaceborne or airborne radar systems. Since airborne passive radar systems utilize broadcast, navigation and excellent communication signals to perform various surveillance tasks and also has attracted significant interest from the distinct past, therefore the need of the hour is to have cost effective systems as compared to conventional active radar systems. Moreover, requirements of small number of secondary samples for effective clutter suppression in bi-static passive radar offer abundant illuminator resources for passive surveillance radar systems. This paper presents a framework for incorporating knowledge sources directly in the space-time beam former of airborne adaptive radars. STAP algorithm for clutter mitigation for passive bi-static radar has better quantitation of the reduction in sample size thereby amalgamating the earlier data bank with existing radar data sets. Also, we proposed a novel method to estimate the clutter matrix and perform STAP for efficient clutter suppression based on small sample size. Furthermore, the effectiveness of the proposed algorithm is verified using MATLAB simulations in order to validate STAP algorithm for passive bi-static radar. In conclusion, this study highlights the importance for various applications which augments traditional active radars using cost-effective measures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bistatic%20radar" title="bistatic radar">bistatic radar</a>, <a href="https://publications.waset.org/abstracts/search?q=clutter" title=" clutter"> clutter</a>, <a href="https://publications.waset.org/abstracts/search?q=covariance%20matrix%20passive%20radar" title=" covariance matrix passive radar"> covariance matrix passive radar</a>, <a href="https://publications.waset.org/abstracts/search?q=STAP" title=" STAP"> STAP</a> </p> <a href="https://publications.waset.org/abstracts/62372/space-time-adaptive-algorithm-in-bi-static-passive-radar-systems-for-clutter-mitigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62372.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">296</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">8362</span> Passive Seismic in Hydrogeological Prospecting: The Case Study from Hard Rock and Alluvium Plain</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Prarabdh%20Tiwari">Prarabdh Tiwari</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Vidya%20Sagar"> M. Vidya Sagar</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Bhima%20Raju"> K. Bhima Raju</a>, <a href="https://publications.waset.org/abstracts/search?q=Joy%20Choudhury"> Joy Choudhury</a>, <a href="https://publications.waset.org/abstracts/search?q=Subash%20Chandra"> Subash Chandra</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Nagaiah"> E. Nagaiah</a>, <a href="https://publications.waset.org/abstracts/search?q=Shakeel%20Ahmed"> Shakeel Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive seismic, a wavefield interferometric imaging, low cost and rapid tool for subsurface investigation is used for various geotechnical purposes such as hydrocarbon exploration, seismic microzonation, etc. With the recent advancement, its application has also been extended to groundwater exploration by means of finding the bedrock depth. Council of Scientific & Industrial Research (CSIR)-National Geophysical Research Institute (NGRI) has experimented passive seismic studies along with electrical resistivity tomography for groundwater in hard rock (Choutuppal, Hyderabad). Passive Seismic with Electrical Resistivity (ERT) can give more clear 2-D subsurface image for Groundwater Exploration in Hard Rock area. Passive seismic data were collected using a Tromino, a three-component broadband seismometer, to measure background ambient noise and processed using GRILLA software. The passive seismic results are found corroborating with ERT (Electrical Resistivity Tomography) results. For data acquisition purpose, Tromino was kept over 30 locations consist recording of 20 minutes at each station. These location shows strong resonance frequency peak, suggesting good impedance contrast between different subsurface layers (ex. Mica rich Laminated layer, Weathered layer, granite, etc.) This paper presents signature of passive seismic for hard rock terrain. It has been found that passive seismic has potential application for formation characterization and can be used as an alternative tool for delineating litho-stratification in an urban condition where electrical and electromagnetic tools cannot be applied due to high cultural noise. In addition to its general application in combination with electrical and electromagnetic methods can improve the interpreted subsurface model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=passive%20seismic" title="passive seismic">passive seismic</a>, <a href="https://publications.waset.org/abstracts/search?q=resonant%20frequency" title=" resonant frequency"> resonant frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=Tromino" title=" Tromino"> Tromino</a>, <a href="https://publications.waset.org/abstracts/search?q=GRILLA" title=" GRILLA"> GRILLA</a> </p> <a href="https://publications.waset.org/abstracts/94110/passive-seismic-in-hydrogeological-prospecting-the-case-study-from-hard-rock-and-alluvium-plain" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/94110.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">188</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">8361</span> Design Practices, Policies and Guidelines towards Implementing Architectural Passive Cooling Strategies in Public Library Buildings in Temperate Climates </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lesley%20Metibogun">Lesley Metibogun</a>, <a href="https://publications.waset.org/abstracts/search?q=Regan%20Potangaroa"> Regan Potangaroa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Some existing sustainable public libraries in New Zealand now depend on air conditioning system for cooling. This seems completely contradictory to sustainable building initiatives. A sustainable building should be ‘self- sufficient’ and must aim at optimising the use of natural ventilation, wind and daylight and avoiding too much summer heat penetration into the building, to save energy consumption and enhance occupants’ comfort. This paper demonstrates that with appropriate architectural passive design input public libraries do not require air conditioning. Following a brief outline of how our dependence on air conditioning has spread over the full range of building types and climatic zones, this paper focuses on public libraries in temperate climates where passive cooling should be feasible for long periods of mild outside temperature. It was found that current design policies, regulations and guidelines and current building design practices militate passive cooling strategies. Perceived association with prestige, inflexibility of design process, rigid planning regulations and sustainability rating systems were identified as key factors forcing the need for air conditioning. Recommendations are made on how to further encourage development in this direction from the perspective of architectural design. This paper highlights how architectural passive cooling design strategies should be implemented in government initiated policies and regulations to develop a more sustainable public libraries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=public%20library" title="public library">public library</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20design" title=" sustainable design"> sustainable design</a>, <a href="https://publications.waset.org/abstracts/search?q=temperate%20climate" title=" temperate climate"> temperate climate</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20cooling" title=" passive cooling"> passive cooling</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20conditioning" title=" air conditioning"> air conditioning</a> </p> <a href="https://publications.waset.org/abstracts/75107/design-practices-policies-and-guidelines-towards-implementing-architectural-passive-cooling-strategies-in-public-library-buildings-in-temperate-climates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75107.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">249</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">8360</span> Gramscian Class Analysis of the Brexit Process in the Passive Revolution Framework</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Volkan%20Gulsen">Volkan Gulsen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper attempts to indicate the main class dynamics of the Brexit process in a Gramscian theoretical framework. It further aims to point out the influence of the withdrawal of the United Kingdom on the European Union class structure. It defines the unification process of the European Union as a passive revolution. In that way, the Brexit process has been described as a moment of negation in the European Union history of class struggle. It will be argued that the withdrawal of the United Kingdom has already altered the European class structure from the embedded neoliberal structure to a more corporate-liberal one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brexit" title="brexit">brexit</a>, <a href="https://publications.waset.org/abstracts/search?q=gramsci" title=" gramsci"> gramsci</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20revolution" title=" passive revolution"> passive revolution</a>, <a href="https://publications.waset.org/abstracts/search?q=post-neoliberalism" title=" post-neoliberalism"> post-neoliberalism</a> </p> <a href="https://publications.waset.org/abstracts/152209/gramscian-class-analysis-of-the-brexit-process-in-the-passive-revolution-framework" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152209.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">152</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">8359</span> Passive Heat Exchanger for Proton Exchange Membrane Fuel Cell Cooling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Tolj">Ivan Tolj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water produced during electrochemical reaction in Proton Exchange Membrane (PEM) fuel cell can be used for internal humidification of reactant gases; hydrogen and air. On such a way it is possible to eliminate expensive external humidifiers and simplify fuel cell balance-of-plant (BoP). When fuel cell operates at constant temperature (usually between 60 °C and 80 °C) relatively cold and dry ambient air heats up quickly upon entering channels which cause further drop in relative humidity (below 20%). Low relative humidity of reactant gases dries up polymer membrane and decrease its proton conductivity which results in fuel cell performance drop. It is possible to maintain such temperature profile throughout fuel cell cathode channel which will result in close to 100 % RH. In order to achieve this, passive heat exchanger was designed using commercial CFD software (ANSYS Fluent). Such passive heat exchanger (with variable surface area) is suitable for small scale PEM fuel cells. In this study, passive heat exchanger for single PEM fuel cell segment (with 20 x 1 cm active area) was developed. Results show close to 100 % RH of air throughout cathode channel with increased fuel cell performance (mainly improved polarization curve) and improved durability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PEM%20fuel%20cell" title="PEM fuel cell">PEM fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20heat%20exchange" title=" passive heat exchange"> passive heat exchange</a>, <a href="https://publications.waset.org/abstracts/search?q=relative%20humidity" title=" relative humidity"> relative humidity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20management" title=" thermal management"> thermal management</a> </p> <a href="https://publications.waset.org/abstracts/104586/passive-heat-exchanger-for-proton-exchange-membrane-fuel-cell-cooling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104586.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">278</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">8358</span> Micro-Oscillator: Passive Production and Manipulation of Microdrops</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khelfaoui%20Rachid">Khelfaoui Rachid</a>, <a href="https://publications.waset.org/abstracts/search?q=Chekifi%20Tawfiq"> Chekifi Tawfiq</a>, <a href="https://publications.waset.org/abstracts/search?q=Dennai%20Brahim"> Dennai Brahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Maazouzi%20A.%20Hak"> Maazouzi A. Hak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A numerical and experimental studies of passive micro drops production have been presented. This paper focuses on the modeling of micro-oscillators systems which are composed by passive amplifier without moving part. The micro-system modeling is based on geometrical oscillators form. An asymmetric micro-oscillator design that is based on a bistable fluidic amplifier is proposed. The characteristic size of the channels is generally about 35 microns of depth. The numerical results indicate that the production and manipulation of microdrops are possible with passive device within a typical oscillators chamber of 2.25 mm diameter and 0.20 mm length when the Reynolds number is Re = 490. The novel micro drops method that is presented in this study provides a simple solution about the production of microdrops problems in micro system. We undertake an experimental step. The first part is based on the realisation of sample oscillator; the second part is consisted of visualization, production and manipulation of microdrops. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modelling" title="modelling">modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=miscible" title=" miscible"> miscible</a>, <a href="https://publications.waset.org/abstracts/search?q=micro%20drops" title=" micro drops"> micro drops</a>, <a href="https://publications.waset.org/abstracts/search?q=production" title=" production"> production</a>, <a href="https://publications.waset.org/abstracts/search?q=oscillator%20sample" title=" oscillator sample"> oscillator sample</a>, <a href="https://publications.waset.org/abstracts/search?q=capillary" title=" capillary"> capillary</a> </p> <a href="https://publications.waset.org/abstracts/14075/micro-oscillator-passive-production-and-manipulation-of-microdrops" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14075.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">378</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=passive%20technology&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=passive%20technology&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=passive%20technology&page=4">4</a></li> <li class="page-item"><a class="page-link" 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