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Dissertations / Theses on the topic 'Layer Performance'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kunkel, Julian Martin. "Performance Analysis of the PVFS2 Persistency Layer." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:16-opus-63302.

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2

Karlsson, Jonas. "Transport-Layer Performance in Wireless Multi-Hop Networks." Doctoral thesis, Karlstads universitet, Institutionen för matematik och datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-15603.

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Wireless communication has seen a tremendous growth in the last decades. Continuing on this trend, wireless multi-hop networks are nowadays used or planned for use in a multitude of contexts, spanning from Internet access at home to emergency situations. The Transmission Control Protocol (TCP) provides reliable and ordered delivery of a data and is used by major Internet applications such as web browsers, email clients and file transfer programs. TCP traffic is also the dominating traffic type on the Internet. However, TCP performs less than optimal in wireless multi-hop networks due to packe

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3

Chen, Cheng. "Performance evaluation of optimized physical layer network coding." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18913/.

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With the development of the wireless networks these years, devices are required to have an even higher data rate, and thus the interference between devices remains a significant problem to be solved. In order to secure a reliable transmission with- out wasting network capacity, we would necessarily select a proper transmission scheme. The Physical layer Network Coding (PNC) , is one of the optimum choices as it can increase the efficiency largely, especially in a system with 2 users and 1 relay (TWRC). Generally speaking, we may divide our research into two aspects: channel and channel coding.

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Plas, Angélique (Angélique Pascale). "Performance of a boundary layer ingesting propulsion system." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35568.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2006.<br>Includes bibliographical references (p. 111-114).<br>This thesis presents an assessment of the aerodynamic performance of an aircraft propulsion system, with embedded engines, in the presence of aircraft fuselage boundary layer ingestion (BLI). The emphasis is on defining the role that the turbomachinery (i.e., the fan, in the ultra high bypass engines considered) plays in establishing the flow benefit due to BLI. A three-dimensional body force approach to fan response to inlet distortion has

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5

Breitfeld, Oliver. "Improving the performance of aerofoil sections using momentum transfer via a secondary flow." Thesis, University of South Wales, 2002. https://pure.southwales.ac.uk/en/studentthesis/improving-the-performance-of-aerofoil-sections-using-momentum-transfer-via-a-secondary-flow(a3627a17-2b56-4e3a-9c73-64e0e105f3d6).html.

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Aerodynamic flow control can improve aerofoil performance by influencing the natural growth of boundary layers, which develop on the surface of vehicles moving in viscous fluids. Many active and passive techniques have been developed to reduce drag and/or increase the lift of aerofoil sections. The work presented in this thesis is concerned with the active excitation of the boundary layer on the suction side of aerofoil sections through momentum transfer via a secondary flow. The secondary flow was achieved by air passing through an air breathing device (ABD) which was implemented in the aerof

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6

Berezin, Maria Eugenia. "Cross-layer techniques for Wireless Local Area Networks." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENM069/document.

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Dans cette thèse, nous examinons les aspects essentiels des réseaux locaux sans fil IEEE 802.11 (réseaux WiFi) en mode infrastructure, et identifions les problèmes qui peuvent affecter leurs performances. Après avoir étudié l'état de l'art, nous constatons que de nombreux efforts de recherche ont proposé des solutions diverses mais présentant des limitations qui empêchent leur déploiement dans les réseaux locaux sans fil existants. En outre, les utilisateurs de ces réseaux ont des attentes toujours croissantes de disponibilité, de fiabilité, de réponse instantanée et de sécurité de la part de

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Bandaru, Rammohan, and Debashis Barman. "Performance Evaluation of SCTP as a Transport Layer Protocol." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16003.

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TCP and UDP are the most popular transport protocols used for end-end data transmission. The rapid growth of internet leads to development of many innovative applications in the current environment. Depending on the functionality of these applications, requirements of transport protocols are changing. TCP is known for its problems with Head Of Line blocking (HOL) and SYN attacks which gives reduced performance, and also doesn’t support Multi-Homing. SCTP is another transport layer protocol similar to TCP which provides end-end communication. It has some unique features like support for Multi-h

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8

Vitsas, Vasileios. "Link layer protocol performance of indoor infrared wireless communications." Thesis, Bournemouth University, 2002. http://eprints.bournemouth.ac.uk/305/.

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The increasing deployment of portable computers and mobile devices leads to an increasing demand for wireless connections. Infrared presentsseveral advantagesover radio for indoor wireless connectivity but infrared link quality is affected by ambient infrared noise and by low power transmission levels due to eye safety limitations. The Infrared Data Association (IrDA) has developed the widely used IrDA 1.x protocol standard for short range, narrow beam, point to point connections.IrDA addressedthe requirement for indoor multipoint connectivity with the development of the Advanced Infrared (AIr

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9

Tay, Hui Min June. "Improving end system performance using a robust link layer." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274856.

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A software-based modem design offers a new opportunity to integrate processing at various levels, to enhance performance (TCP throughput) and robustness (to jamming). There are several key problems that need to be addressed that impact link ARQ performance. ACKs are needed for link sender to retransmit or adapt and an imperfection of ACK feedback from receiver prevents a link responding to loss and may cause the forwarding to be suspended. Another problem identified is that although ARQ may efficiently retransmit corrupted frames resulting from Partial Band Noise Jamming, it is inefficient whe

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JOSHI, TARUN. "CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT OF WIRELESS NETWORKS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1159560622.

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AHUJA, DISHA. "CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT IN WIRELESS NETWORKS." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201111828.

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Natarajan, Preethi. "Leveraging innovative transport layer services for improved application performance." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 155 p, 2009. http://proquest.umi.com/pqdweb?did=1674099761&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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13

Mehta, Anil. "MAC AND APPLICATION LAYER PROTOCOLS FOR HIGH PERFORMANCE NETWORKING." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/396.

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High-performance networking (HPN) is of significance today in order to enable next-generation applications using wired and wireless networks. Some of the examples of HPN include low-latency industrial sensing, monitoring and automation using Wireless Sensor Networks (WSNs). HPN however requires protocol optimization at many layers of the open system interface (OSI) network model in order to meet the stringent performance constraints of the given applications. Furthermore, these protocols need to be impervious to denial of service (DoS) and distributed DoS (DDoS) attacks. Some of the key perfor

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Hartfield, Grant I. "Link-layer and network-layer performance of an undersea acoustic network at Fleet Battle Experiment-India." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FHartfield.pdf.

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Thesis (M.S. in Information Systems and Operations)--Naval Postgraduate School, June 2003.<br>Thesis advisor(s): Joseph A. Rice, Dan C. Boger. Includes bibliographical references (p. 35). Also available online.

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Mchedlishvili, Sergo, and Girinandan Srinivasa. "Recovery Performance in Redundant Campus Network." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3719.

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<p>Over years<strong>,</strong> there have been tremendous changes in internetworking technologies and there are a number of real time applications that are flooded into the market. Most real-time applications are sensitive to traffic loss because of their nature of exchanging data without acknowledgement. In any type of data network, redundancy is important to backup and recover the connectivity without human intervention in case of device or link failure. However, it is very crucial to design an optimal redundant network, particularly for real-time applications providing minimal losses durin

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Shah, Vishal, and Todor Cooklev. "THROUGHPUT AND LATENCY PERFORMANCE OF IEEE 802.11E WITH 802.11A, 802.11B, AND 802.11G PHYSICAL LAYERS." International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/605337.

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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California<br>IEEE 802.11e is an amendment of the medium-access control (MAC) layer of the standard for wireless local area networking IEEE 802.11. The goal of 802.11e is to provide 802.11 networks with Quality of Service (QoS). 802.11 has three physical layers (PHY) of practical importance: 802.11b, 802.11a, and 802.11g. 802.11a and 802.11g provide data rates between 6 and 54 Mbps, and 802.11b provides data rates of 5.5 Mbps and 11 Mbps. However these data rates are not the actual t

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Hossain, Md Jahangir. "Some cross-layer design and performance issues in wireless networks." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31332.

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Present and future generation wireless systems are designed to support a wide variety of services, including video conferencing, media streaming, Internet access, email transfer, remote file access and web-browsing. Different applications have different traffic characteristics and quality of service (QoS) requirements. These QoS parameters include delay constraint, packet loss rate (PLR) and packet error rate (PER) requirement. For example, depending on the throughput or delay requirements of the services, wireless data services have already been classified as guaranteed or best-effort service

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Johnson, Wesley Louis. "Thermal performance of cryogenic multilayer insulation at various layer spacings." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4681.

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Multilayer insulation (MLI) has been shown to be the best performing cryogenic insulation system at high vacuum (less than 10[super]-3 torr), and is widely used on spaceflight vehicles. Over the past 50 years, many numerous investigations of MLI have yielded a general understanding of the many variables associated with MLI. MLI has been shown to be a function of variables such as warm boundary temperature, the number of reflector layers, and the spacer material in between reflectors, the interstitial gas pressure and the interstitial gas. Because conduction between reflectors increases with th

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Garcia, Johan. "Improving Performance in Heterogeneous Networks: A Transport Layer Centered Approach." Doctoral thesis, Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2364.

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The evolution of computer communications and the Internet has led to the emergence of a large number of communication technologies with widely different capabilities and characteristics. While this multitude of technologies provides a wide array of possibilities it also creates a complex and heterogeneous environment for higher-layer communication protocols. Specific link technologies, as well as overall network heterogeneity, can hamper user-perceived performance or impede end-to-end throughput. In this thesis we examine two transport layer centered approaches to improve performance. The firs

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SINGH, DAMANJIT. "CROSS LAYER TECHNIQUES TO ENHANCE LINK PERFORMANCE IN WIRELESS NETWORKS." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1195075507.

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Shen, Lening. "HIGH-PERFORMANCE PEROVSKITE SOLAR CELLS BY ACTIVE LAYER COMPOSITION ENGINEERING." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627601149929521.

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Murray, David. "Cross layer performance improvements in Multi-hop Ad-hoc networks." Thesis, Murray, David (2011) Cross layer performance improvements in Multi-hop Ad-hoc networks. PhD thesis, Murdoch University, 2011. https://researchrepository.murdoch.edu.au/id/eprint/5805/.

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The multi hop architecture can provide greater range, spatial efficiency and throughput with lower power consumption than a traditional point coordinated design. In addition, the self-configuring, self-healing characteristics of this architecture enable previously infeasible network scenarios and applications. These benefits have motivated a significant volume of research. Unfortunately, the ISO networking model was not designed for multi hop ad hoc networks and subsequently, some cross layer interactions are necessary to provide adequate performance. This thesis develops and evaluates solutio

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Liu, Minkui. "A cross-layer approach : impact of the physical layer on the design and performance of wireless scheduling protocols /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2005. http://wwwlib.umi.com/cr/ucsd/fullcit?p3170227.

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Mu, Rui Lin. "Improvement of Sound Insulation Performance of Multi-layer Structures in Buildings." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174914.

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Prokkola, J. (Jarmo). "Enhancing the performance of ad hoc networking by lower layer design." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514289323.

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Abstract The research of early ad hoc-like networks, namely multi-hop packet radio networks, was mainly concentrated on lower layers (below network layer). Interestingly, the research of modern ad hoc networks has been mainly restricted to routing protocols. This is understandable, since routing is very challenging in such dynamic networks, but the drawback is that the lower layer models used in the studies are often highly simplified, giving inaccurate or even incorrect results. In addition, modern ad hoc network solutions are usually suboptimal because lower layers, not designed especially f

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Shaikh, Abdul Samad, and Khatri Chandan Kumar. "Performance Evaluation of LTE Physical Layer Using SC-FDMA & OFDMA." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3080.

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Since past few decades different types of cellular networks were launched and went successful on the radio links such as WiMAX, that became very popular because of its high data rate (70Mbps) and support for providing wireless internet services over 50km distance. The UMTS Long Term Evolution (LTE) is an emerging technology in the evolution of 3G cellular services. LTE runs on an evolution of the existing UMTS infrastructure already used by over 80 percent of mobile subscribers globally. We have very limited resources in cellular technologies and it is important to utilize them with high effic

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RADAMPOLA, Senanie Sujeewa, and senanie s. radampola@mainroads qld gov au. "EVALUATION AND MODELLING PERFORMANCE OF CAPPING LAYER IN RAIL TRACK SUBSTRUCTURE." Central Queensland University. Centre for Railway Engineering, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060817.115415.

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In the design of rail track structures where the subgrade cannot achieve the desired capacity, enabling the required standard of track geometry to be maintained for the speed, axle load and tonnage to be hauled, a capping layer of granular material is placed between the natural ground or the embankment fill material and the ballast to protect the underlying weaker layers. In spite of the important role played by the capping layer, very little research has been carried out on its performance. The current practice of design of the capping layer, therefore, is based on working stress philosophy w

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Khallid, Murad. "Performance Enhancement Using Cross Layer Approaches in Wireless Ad Hoc Networks." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3180.

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Ad hoc network is intrinsically autonomous and self-configuring network that does not require any dedicated centralized management. For specialized applications such as, military operations, search-and-rescue missions, security and surveillance, patient monitoring, hazardous material monitoring, 4G (4th Generation) coverage extension, and rural communication; ad hoc networks provide an intelligent, robust, flexible and cost effective solution for the wireless communication needs. As in centralized wireless systems, ad hoc networks are also expected to support high data rates, low delays, and l

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Tanzil, S. M. Shahrear. "Some cross-layer design and performance issues in cognitive radio networks." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45112.

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With the rapid deployment of data rate hungry wireless services, the demand for the radio spectrum is increasing day-by-day. On the other hand, fixed spectrum access (FSA) policy that allocates/assigns a certain portion of radio spectrum to a certain group of users has traditionally been adopted. Recent studies on spectrum usage have revealed that a large portion of the allocated spectrum is underutilized. In order to improve the overall spectrum utilization, recently dynamic spectrum access (DSA) policy has received a great deal of attention. Cognitive radio (CR) is a key enabling technology

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Alfredsson, Stefan. "A Cross-Layer Perspective on Transport Protocol Performance in Wireless Networks." Doctoral thesis, Karlstads universitet, Avdelningen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-9572.

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Communication by wireless technologies has seen a tremendous growth in the last decades. Mobile phone technology and wireless broadband solutions are rapidly replacing the last-hop wireline connectivity for telephones and Internet access. Research has, however, shown that Internet traffic can experience a performance degradation over wireless compared to wired networks. The inherent properties of radio communication lead to a higher degree of unreliability, compared to communication by wire or fiber. This can result in an increased amount of transmission errors, packet loss, delay and delay

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Hurtig, Per. "Transport-Layer Performance for Applications and Technologies of the Future Internet." Doctoral thesis, Karlstads universitet, Avdelningen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-8920.

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To provide Internet applications with good performance, the transport protocol TCP is designed to optimize the throughput of data transfers. Today, however, more and more applications rely on low latency rather than throughput. Such applications can be referred to as data-limited and are not appropriately supported by TCP. Another emerging problem is associated with the use of novel networking techniques that provide infrastructure-less networking. To improve connectivity and performance in such environments, multi-path routing is often used. This form of routing can cause packets to be reorde

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Mbarushimana, Consolee. "Cross-layer performance enhancement of Qos-Aware mobile Ad hoc networks." Thesis, Glasgow Caledonian University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517936.

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Bharadwaj, Rahul. "Improved Performance with Layer Orientation Incorporated Pleated Media on Coalescence Filtration." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280828562.

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Mulderig, Andrew J. "Performance and Active Layer Morphology of P3HT-PCPDTBT Organic Photovoltaic Cells." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1457619609.

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35

Dufresne, Sophie. "Optimization of an airfoil's performance through moving boundary control." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09292009-020211/.

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Christou, Ioannis. "Performance analysis of IRTOOL and comparison of LWKD marine boundary layer program." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA374320.

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Thesis (M.S. in Applied Physics) Naval Postgraduate School, December 1999.<br>"December 1999". Thesis advisor(s): Alfred W. Cooper. Includes bibliographical references (p. 185-187). Also available online.

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Yasami, Keyvan. "Effect of Channel Estimation Error on Performance of Physical Layer Network Coding." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/YasamiK2011.pdf.

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Arianpoo, Nasim. "Improving transport layer performance over multi-hop wireless networks by machine learning." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61372.

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The emerging use of multi-homed wireless devices along with simultaneous multi-path data transfer offers tremendous potentials to improve the capacity of multi-hop wireless networks. Concurrent Multi-path Transfer (CMT) over Stream Control Transmission Protocol (SCTP) is a form of reliable multi-path transport layer protocol with unique features that resonate with multi-path nature of the multi-hop wireless networks. The present thesis identifies and addresses some of the challenges of CMT-SCTP over wireless multi-hop networks. One main challenge raised by the multi-hop wireless network for

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Alorainy, Abdulaziz. "Cross-layer performance analysis of resource allocation mechanisms in emerging wireless networks." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62553.

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Due to rapidly increasing contribution of information and communication technology (ICT) industry to global energy consumption and increasing popularity of wireless communications, it is essential to further improve energy efficiency, cellular coverage, and network capacity of emerging wireless networks. Moreover, these improvements must be achieved in a cost-efficient manner. Various solutions are being considered to address these issues and some of these solutions have already been deployed. Examples of these solutions include small cell networks (SCNs), cell sleeping, and carrier aggre

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Kong, Lei. "Performance analysis and optimization for MAC-layer IEEE 802.16e power saving mechanism /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?ECED%202007%20KONG.

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Rinaldi, Claudia. "Link-Layer Error Recovery Techniques to improve TCP Performance over Wireless Links." Thesis, KTH, Reglerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109460.

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Recent technology has involved TCP in wireless applications even if it was originally designed to work over wired links. It is well known that wireless links are usually characterized by phenomena like shadowing, multipath propagation and path loss that cause an increase in the bit error rate. Moreover,TCP protocol was supposed to interpret all the losses as due to congestion because of it was designed to work over wired networks. All these problems caused by the wireless application of TCP usually degrade TCP performances. In order to improve TCP behavior over wireless links several solutions

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Sun, Yong. "A rigorous physical layer investigation of next generation high performance radio LANs." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390095.

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Yang, Chen-Chung, and 楊政中. "Performance analysis of Laser smoke layer dectector." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/36927375819771514809.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>95<br>Fire damages always cast shadows on social events that people cannot forget. Besides claiming people’s lives, it’s more difficult to estimate for a great loss of treasure. According to the past statistics, the most fatal cause of building fires was dense smoke. It is because heavy smoke will bring about vision barriers, and then lead to much more difficulties in fleeing. As a result, the main purpose of this research is confer the performance test of smoke which laser smoke layer detectors bring. This research is mainly to test the voltage of smoke obscurati

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Coelho, Nuno Miguel Teixeira. "Improving silicon probe performance through layer-by-layer coating." Master's thesis, 2015. http://hdl.handle.net/10362/16388.

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Fully comprehending brain function, as the scale of neural networks, will only be possi-ble with the development of tools by micro and nanofabrication. Regarding specifically silicon microelectrodes arrays, a significant improvement in long-term performance of these implants is essential. This project aims to create a silicon microelectrode coating that provides high-quality electrical recordings, while limiting the inflammatory response of chronic implants. To this purpose, a combined chitosan and gold nanoparticles coating was produced allied with electrodes modification by electrodepositio

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Panigrahy, Nitish Kumar, and Manat Kanher. "Improving MAC Layer Performance in WLAN." Thesis, 2012. http://ethesis.nitrkl.ac.in/3640/1/THESIS2.3.pdf.

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Abstract WLAN stands for Wireless Local Area Network. Now a days wireless technology have been widely implemented starting from home to educational institutes. So improving its performance is highly required. To increase the performance of the network some modifications can be made in MAC layer. So MAC layer has been studied thoroughly and some modification was done on back off algorithm. Some of the key concepts of our project are: Distance and performance: If distance between station and the AP varies then also performance varies. Scalability & Collision: If number of nodes

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Kai-ChiehChang and 張凱捷. "Investigation of Performance Improvement for a Multi-layer Transmission Layer and Modulation of the Active Layer Perovskite Solar Cells." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5ma8kx.

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Chung-Cheng, Yu. "Performance Evaluation of HSUPA from Cross-Layer Perspective." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2007200620072300.

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Yu, Chung-Cheng, and 余仲晟. "Performance Evaluation of HSUPA from Cross-Layer Perspective." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/13497976221357598791.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>94<br>To fulfill the increasing demand of high throughput and low delay, enhancements to Wideband CDMA (WCDMA) uplink are considered for standardization and called High Speed Uplink Packet Access (HSUPA). In this thesis, the system level performance of HSUPA is evaluated with a greedy strategy for joint data rate and transmitting power assignment first. Multiuser detection (MUD) can combat intra-cell interference and increase system capacity. The system performance with MUD is also evaluated by system level simulation. The benefit to the system from the advanced det

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Tsai, Yen Chi, and 蔡炎奇. "Thermal Performance of Hydroponic Thin-Layer Green Roof." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/89010518470971964810.

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碩士<br>東海大學<br>景觀學系<br>103<br>In recent years, hydroponic planting have been used on roof top for cooling due to the easy access of water and construction conveniences. But how effective is hydroponic green roof’s thermal performance? Does hydroponic green roof perform better than extensive green roof? The experiment site was located in Taichung,Taiwan. The experiment begins from July 19, 2014 to September 16, 2014. The results showed that the thicker the hydroponic medium, the better the cooling effect and reduction percentage of heat amplitude. However,the difference in thermal performance be

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Ko, Miyong. "Wireless Physical-Layer Security Performance of Uwb systems." 2011. https://scholarworks.umass.edu/theses/689.

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Traditionally, spread-spectrum systems have been employed to provide low probability-of-intercept (LPI) and low probability-of-detection (LPD) performances at the physical layer, but the messages transmitted over such a system are still encrypted with a powerful cipher to protect their secrecy. Our challenge is to find a solution to provide an additional level of security at the physical layer so that simple systems such as RFID tags with limited resources can be secure without using standard encryption. It has recently been suggested that the cryptographic security of the system can be enhanc

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