Implementation and performance study of opportunistic network coding in 802 11 based wireless ad hoc networks using qualnet
the relationship between corporate social responsibility implementation and the development of five selected companies in hanoi
... Vai river); food poisoning (case of Melamine infected in infant milk); and other cheating in selling products to customers (the fraud in selling fuel) After suffering these cases, society requires ... individual people and company on CSR concept, the CSR implementation of companies in Ha Noi and its impacts to the development of the companies And in order to collect data for the research, questionnaire ... time to answer my questionnaire ii THE RELATIONSHIP BETWEEN CORPORATE SOCIAL RESPONSIBILITY IMPLEMENTATION AND THE DEVELOPMENT OF FIVE SELECTED COMPANIES IN HANOI By HO PHAM QUYNH NGA April 2011...
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Báo cáo khoa học: Molecular identification and expression study of differentially regulated genes in the Pacific oyster Crassostrea gigas in response to pesticide exposure doc
... (between and 24 h) used by the authors In another study, 258 differentially expressed genes were identified in C gigas in response to exposure to hydrocarbons for and 21 days [22], and some of these genes ... among the down -regulated genes Expression of herbicide -regulated genes The time-dependent expression of 13 genes that were up -regulated by exposure to herbicide and five that 391 Oyster response to ... genes in common to both the ADI and glyphosate response SSH libraries These were glutamine synthase, ATP synthetase, b-1,3-glucan binding protein and some housekeeping genes such as tubulin and...
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Báo cáo hóa học: " A survey of performance enhancement of transmission control protocol (TCP) in wireless ad hoc networks" pptx
... second mechanism, adaptive pacing, is used for regulating the data flow in a more balanced and fair way Adaptive pacing adds an extra interval to the backoff time, which is equal to the transmission ... However, only a single path is used for data transmission and the second one maintained as a backup path to minimise the chance of route unavailability To select a primary path and a backup path, two ... access point; ADSN: ACK duplication sequence number; ACKs: acknowledgements; AODV: ad hoc on-demand distance vector; ATCP: ad hoc TCP; ADV: adaptive distance vector; APS: adaptive packet size; APS-FeW:...
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Báo cáo hóa học: " Research Article On Wireless Ad Hoc Networks with Directional Antennas: Efficient Collision and Deafness Avoidance Mechanisms" ppt
... 20–30] for ad hoc networks with directional antennas are based on the IEEE 802.11 four-way handshake, with some adaptations to take advantage of directional communications Such adaptations include, ... this section More information about directional antenna models is found in [15–18] In wireless ad hoc networks with omnidirectional antennas, there is only one type of neighborhood relationship ... neighbors, directional- omni (DO) neighbors, omni -directional (OD) neighbors, and directional- directional (DD) neighbors When directional antennas are involved, the transmission range not only depends on...
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Báo cáo hóa học: " Research Article On the Throughput Capacity of Large Wireless Ad Hoc Networks Confined to a Region of Fixed Area" pptx
... examined the uniform throughput of large ad hoc networks confined to a region of fixed area It was found that, for a large enough total area, as the total number of nodes increases, the achievable ... achievable throughput can exhibit an up-anddown behavior reaching a a maximum at a critical spatial node density that is proportional to a power of the ratio of the total noise power to the transmitted ... numerical constants b1 , b2 , b1 , and b2 independent of all network parameters such that the uniform per node throughput of an ad hoc network confined to an square region of (dimensionless) area A...
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Báo cáo hóa học: " On the Geometrical Characteristics of Three-Dimensional Wireless Ad Hoc Networks and Their Applications" pptx
... represents the local topological status of the wireless ad hoc network To a certain extent, the node locations and their corresponding degrees would affect the configuration of the wireless ad hoc network ... from (3) and reflects the distribution of A in the Y − Z plane Thus, the problem in three-dimensional space can be reduced to the combination of one in one-dimension and one in two-dimension It EURASIP ... relationship between the mean value of the max-flow and the node number of a wireless ad hoc network when the covering radius keeps constant Another important observation is that, if the covering radius...
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Báo cáo hóa học: " Improving TCP Performance over Wireless Ad Hoc Networks with Busy Tone Assisted Scheme" pdf
... The TCP instability problem in 802.11-based wireless ad hoc networks was first reported in [1], and it was further investigated in [2] The TCP unfairness problem in multihop wireless ad hoc networks ... propose a busy tone assisted broadcast and link error detection scheme with low overhead and good energyefficiency, where only the sender needs to transmit two short messages in the busy tone channel ... message, and node advertisement message, and so forth Unlike wired networks, it is very difficult to provide reliable broadcast in wireless ad hoc networks due to the high bit error rate, wireless medium...
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Báo cáo hóa học: " Research Article Capacity of Wireless Ad Hoc Networks with Opportunistic Collaborative Communications" pptx
... in wireless networks: efficient protocols and outage behavior,” IEEE Transactions on Information Theory, vol 50, no 12, pp 3062–3080, 2004 [4] M Qin and R S Blum, Capacity of wireless ad hoc networks ... wireless networks, ” IEEE Transactions on Information Theory, vol 46, no 2, pp 388–404, 2000 [2] S Toumpis and A J Goldsmith, Capacity regions for wireless ad hoc networks, ” IEEE Transactions on Wireless ... OST scheme 5.1 Capacity region and uniform capacity The basic concept in the framework of [2] is that of a basic transmission scheme, which describes a possible state of the ad hoc network under...
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Báo cáo hóa học: " Research Article Capacity of Wireless Ad Hoc Networks with Opportunistic Collaborative Communications" pdf
... in wireless networks: efficient protocols and outage behavior,” IEEE Transactions on Information Theory, vol 50, no 12, pp 3062–3080, 2004 [4] M Qin and R S Blum, Capacity of wireless ad hoc networks ... wireless networks, ” IEEE Transactions on Information Theory, vol 46, no 2, pp 388–404, 2000 [2] S Toumpis and A J Goldsmith, Capacity regions for wireless ad hoc networks, ” IEEE Transactions on Wireless ... OST scheme 5.1 Capacity region and uniform capacity The basic concept in the framework of [2] is that of a basic transmission scheme, which describes a possible state of the ad hoc network under...
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Báo cáo y học: " A modeling and simulation study of siderophore mediated antagonism in dual-species biofilms" pot
... because of the affinity of one of the strains involved in the study towards the reactor material Since the interaction of population and resource dynamics in biofilm communities can be very different ... improvements that may be revealed by experimental results to be necessary to account for a qualitatively and quantitatively accurate description of siderophore mediated microbial antagonism Competing interests ... morphology and local quantities, we plot in Figure also the amount of biomass of chelator and non-chelator in the system as a function of time and normalized by system size These are computed as N avg...
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On applying network coding to wireless ad hoc networks a study of robustness, efficiency and cross layer synergy
... between network layer and application layer The availability of cross- layer information can greatly help both in network layer and in application layer By taking the offered load information from ... physical radio Without such kind of information, transport and application layers cannot adapt (or react) to the additional physical -layer time-varying constraints such as highly variant jitter ... scheme can be overcome Design a cross- layer solution that jointly considers network conditions in the network layer and in the application layer With the cross- layer approach, the application layer...
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Phy layer and mac layer protocol design and performance analysis for opportunistic spectrum access in cognitive radio networks
... both physical (PHY) layer and medium access control (MAC) layer In this thesis, we focus on cognitive radio networks (CRN) and aim to improve the spectrum sensing performance at the PHY layer and ... Sensing Strategies for Cognitive Radio Mesh Networks Chapter Cooperative Spectrum Sensing Strategies for Cognitive Radio Mesh Networks In this chapter, we consider cooperative spectrum sensing for ... Random Access Model 19 IEEE 802.11 MAC Protocol in WLAN and Multi-hop Networks 20 Cooperative Spectrum Sensing Strategies for Cognitive Radio Mesh Networks 24 3.1 Introduction...
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The study of TCP performance in IEEE 802 11 based mobile ad hoc networks
... the two major areas related to the work described herein These are the study of TCP performance in ad hoc networks and the mathematical approaches to model TCP in the Internet 2.1 2.1.1 TCP in ... THE STUDY OF TCP PERFORMANCE IN IEEE 802. 11 BASED MOBILE AD HOC NETWORKS LI XIA (B Sc., Nan Jing University, PRC ) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ELECTRICAL ... prevalence of TCP application, the research on the TCP performance improvement in wireless ad hoc networks becomes a hot issue This thesis focuses on the investigation of TCP in MANETs In the following...
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Stochastic optimal control and performance analysis of wireless ad hoc networks
... Decision Process Single-Agent: basic MDP, SMDP, HSMDP Mobile Ad Hoc Network Multi-Agent: DEC-POMDP How to Achieve Stability? How to Control & Optimize? How to Derive Bounds? Model-Based: DP Irreducibility, ... V-Uniform Ergodicity, Drift Conditions Model-Free: NDP/RL, Policy Gradient Main Contribution: Achieve Stability, Bounds, Optimal Control & Optimization simultaneously ệ ẵẵ è ì ì ẵẵ ểềỉệ Use Stability ... Geometric Drift Conditions Other Contributions: Decentralized Model-free Algorithm, Handle Partial Observability & Locality of Interaction ỉ ểềì ề ỉ ểềá ỉ ểềỉệểéé ểẹ ỉệ èể ỉ ệìỉ ìỉ é ỉí ề ề ề ỉ ệ ỉ...
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Implementation and performance study of opportunistic network coding in 802 11 based wireless ad hoc networks using qualnet
... message on the performance of opportunistic network coding scheme We then use the findings for further study of network coding scheme on large scale wireless ad- hoc networks We find out there is an ... mobile ad- hoc networks In this thesis we propose to first study and investigate the performance behavior and key control parameters of opportunistic network coding in large scale static wireless ... illustration of network coding, showing how network coding saves bandwidth consumption It shows Alice and Bob to exchange a pair of packets using transmissions instead of Recently the research focus on network...
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Từ khóa: comparison of the maximal spatial throughput of aloha and csma in wireless ad hoc networkstransmission capacity of wireless ad hoc networks with outage constraints pdf20 capacity bandwidth and available bandwidth in wireless ad hoc networks definitions and estimationsstudy and performance comparison of manet routing protocolsstudy and performance comparison of manet routing protocols tora ldr and zrpa performance comparison of multihop wireless ad hoc network routing protocols pdfBáo cáo thực tập tại nhà thuốc tại Thành phố Hồ Chí Minh năm 2018Nghiên cứu sự biến đổi một số cytokin ở bệnh nhân xơ cứng bì hệ thốngchuyên đề điện xoay chiều theo dạngNghiên cứu sự hình thành lớp bảo vệ và khả năng chống ăn mòn của thép bền thời tiết trong điều kiện khí hậu nhiệt đới việt namBiện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitNGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN SLIDEPhát triển mạng lưới kinh doanh nước sạch tại công ty TNHH một thành viên kinh doanh nước sạch quảng ninhPhát hiện xâm nhập dựa trên thuật toán k meansNghiên cứu, xây dựng phần mềm smartscan và ứng dụng trong bảo vệ mạng máy tính chuyên dùngNghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúngTìm hiểu công cụ đánh giá hệ thống đảm bảo an toàn hệ thống thông tinKiểm sát việc giải quyết tố giác, tin báo về tội phạm và kiến nghị khởi tố theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn tỉnh Bình Định (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtTrách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)Đổi mới quản lý tài chính trong hoạt động khoa học xã hội trường hợp viện hàn lâm khoa học xã hội việt namHIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀMQUẢN LÝ VÀ TÁI CHẾ NHỰA Ở HOA KỲ