VNU-UET Repository: No conditions. Results ordered -Date Deposited. 2024-03-28T17:08:34ZEPrintshttp://eprints.uet.vnu.edu.vn/images/sitelogo.pnghttps://eprints.uet.vnu.edu.vn/eprints/2018-06-14T07:54:24Z2018-06-14T07:54:24Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2989This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/29892018-06-14T07:54:24ZĐẢM BẢO CHẤT LƯỢNG DỊCH VỤ CHO TRUYỀN THÔNG ĐA PHƯƠNG TIỆN THEO KIẾN TRÚC DIFFSERVKhác với các ứng dụng truyền thống trên Internet thường là thuần văn bản, các ứng dụng truyền thông đa phương tiện truyền tải nhiều loại dữ liệu khác nhau như âm thanh, hình ảnh, văn bản,...Đặc điểm của các ứng dụng này là có thể chấp nhận sự mất mát thông tin trong một giới hạn nhất định, nhưng đòi hỏi tính thời gian thực (real-time), nghĩa là yêu cầu độ trễ (delay) và thăng giáng độ trễ (jitter) nhỏ. Việc
đảm bảo chất lượng dịch vụ (QoS) là vấn đề hết sức khó khăn và mang tính quyết định đến sự tồn tại, phát triển của các ứng dụng truyền thông đa phương tiện, vì vậy rất nhiều nghiên cứu đã được tiến hành nhằm tìm ra các giải pháp hữu hiệu để đảm bảo QoS như IntServ, Diffserv.... Trong báo cáo này, chúng tôi sẽ trình bày các vấn đề sau: (1) Các ứng dụng truyền thông đa phương tiện, (2) Yêu cầu QoS đối với truyền
thông đa phương tiện, (3) Các phương pháp đảm bảo QoS IntServ (Integrated Services) và DiffServ (Differentiated Services) trong đó chủ yếu trình bày về DiffServ, và (4) các kết quả nghiên cứu của chúng tôi, sử dụng bộ mô phỏng mạng NS để đánh giá hiệu quả của phương pháp DiffServ đến QoS của truyền thông đa phương tiện.Dinh Viet Nguyenvietnd@vnu.edu.vnDuy Loi Vuvuduyloi55@gmail.comDuc Trung Vu2018-06-14T07:53:50Z2018-06-14T07:53:50Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2988This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/29882018-06-14T07:53:50ZPERFORMANCE EVALUATION OF ROUTING PROTOCOLS AND INTERNET ACCESS IN MULTI-HOP MOBILE AD HOC NETWORKSA multi-hop mobile ad hoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the usage of any existing network infrastructure or centralized administration. They are self-organized and used in disaster relief, conference, and battlefield environments where infrastructure had been destroyed or does not exist. Because of the unpredictable
dynamically moving nature of mobile nodes, the overhead of routing traffic in an ad hoc network is likely to be higher than that in a wire-line network. Consequently,routing protocol have been playing crucial role in the efficiency of overall network operation.
There are numerous proposals have been submitted, however many aspects of them needed more investigation and evaluation especially performance and QoS. In this paper, we will evaluate recent development in ad hoc network routing protocols and gateway discovery for Internet access within data intensive environment as well as present quantitative analysis base on simulation by ns-2 network simulator.Manh Ha Nguyenhanm0604@gmail.comDinh Viet Nguyenvietnd@vnu.edu.vn2016-12-28T09:42:41Z2016-12-28T09:42:41Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2142This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/21422016-12-28T09:42:41ZDiscovery of Spatiotemporal Patterns in Mobile EnvironmentThi Hong Nhan VuJeong Hee ChiKeun Ho Ryu2016-12-27T07:37:07Z2016-12-27T07:37:07Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2141This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/21412016-12-27T07:37:07ZFuture Location prediction of Moving Objects Based on Movement RulesThi Hong Nhan Vuvthnhan@vnu.edu.vnKeun Ho Ryu2016-12-27T07:36:40Z2016-12-27T07:36:40Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2139This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/21392016-12-27T07:36:40ZEstimating Object Location in Location-based ServicesThi Hong Nhan Vuvthnhan@vnu.edu.vnKeun Ho Ryu2016-12-27T07:36:09Z2016-12-27T07:36:09Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2138This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/21382016-12-27T07:36:09ZAn Approach to Mining Mobility Association RulesThi Hong Nhan Vuvthnhan@vnu.edu.vnKeun Ho Ryu2016-12-23T04:02:06Z2016-12-23T04:02:06Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2305This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/23052016-12-23T04:02:06ZVietnamese Word Segmentation with CRFs and SVMs: An InvestigationCam Tu Nguyenncamtu@vnu.edu.vnTrung Kien NguyenXuan Hieu Phanhieupx@vnu.edu.vnLe Minh NguyenQuang Thuy Hathuyhq@vnu.edu.vn2016-12-06T05:14:01Z2016-12-06T05:14:01Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2064This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/20642016-12-06T05:14:01ZThe impact of the implosion problem on the backoff time for a reliable multicast protocolThis paper studies the implosion problem in multicast. The result explained in this paper is a part of the work on analyzing the scalability of a reliable multicast protocol. The paper describes a method proposed to determine the backoff time for multicast clients to avoid packet loss due to the implosion problem. The proposed method has been implemented and the output data is shown. The flow of acknowledgment packets from clients to the server has been studied. Random multicast networks are generated and backoff times are calculated in order to show the impact of the implosion problem on the transmission delay in reliable multicast. It is proved by analysis that the backoff interval is proportional to the number of users which is large enough. Linear increase in transmission delay is equivalent to that a reliable multicast protocol fails to work for a large number of users.Le Minh Ngominhnl@vnu.edu.vn2016-12-06T05:08:52Z2016-12-06T05:08:52Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2140This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/21402016-12-06T05:08:52ZA Spatiotemporal Data Management and Mining System ArchitectureJae Du ChungYang Koo LeeThi Hong Nhan Vuvthnhan@vnu.edu.vn2016-12-05T03:04:34Z2016-12-05T03:04:34Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2066This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/20662016-12-05T03:04:34ZTowards building up an m-WorldThe rapid development ofmobile computing has dramatically changed the way users view and use computers. With mobile computing technologies, we can acquire, deliver and process information at every place. Appearing in many forms such as the PalmOS, Pocket PC and Mobile Phone with increasingly
diverse functions, and equipped with advanced peripheral devices such as GPS, camera and wireless adapter, mobile devices is becoming a very powerful all-in-one Personal Digital Assistant (PDA). PDAs have increased the effectiveness, brought people closer and made people more dynamic and flexible. In this paper, we present our research on setting up an m-World with various activities
on PDAs. Our research focuses on three categories: education activities (mlearning), commerce activities (m-commerce) and service activities (m-service).
In the first category, we have built a PDA-based m-learning system which allows the students to access the learning resources and allows the students and lecturers to exchange ideas from anywhere and at any time. In the category of commerce activities, we have developed experimental system which allows the user to do his/her shopping with mobile phones. There are various of systems which we have developed in the category of service activities including tourist assistant and traffic jam warning system. Our initial results have shown that such an m-World we are looking forward to is not very far from real.Le Minh Ngominhnl@vnu.edu.vn2016-08-30T08:36:18Z2016-08-30T08:36:18Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1855This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/18552016-08-30T08:36:18ZMultisensor Network-Based Framework for Video Surveillance: Real-Time Superresolution ImagingGuna SeetharamanVu Ha Lehalv@vnu.edu.vnS. S. IyengarN. BalakrishnanR. Loganantharaj2016-08-30T08:25:08Z2016-08-30T08:25:08Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1845This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/18452016-08-30T08:25:08ZA Super-Resolution Imaging Method Based on Dense Subpixel-Accurate Motion FieldsVu Ha Lehalv@vnu.edu.vnGuna Seetharaman2016-08-30T08:24:13Z2016-08-30T08:24:13Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1844This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/18442016-08-30T08:24:13ZVideo-Assisted Global Positioning in Terrain Navigation with Known LandmarksGuna SeetharamanVu Ha Lehalv@vnu.edu.vn2016-06-10T03:14:42Z2016-06-10T03:14:42Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1773This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/17732016-06-10T03:14:42ZAn Approach to Estimate Software Cost within a Narrow ContextNgoc Bao NguyenViet Ha Nguyenhanv@vnu.edu.vn2016-05-26T15:39:51Z2016-05-26T15:39:51Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1732This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/17322016-05-26T15:39:51ZDesigning Kalman filters for integration of inertial navigation system and global positioning systemDue to the strong growth of MEMS technology, the Inertial Navigation System (INS) is wi del y applie d to navi gati on and g ui dan ce of aircraft movements. However, there are existing errors in the accelerometer and gyroscope signals that cause unacceptable drifts. To minimize these effect s on the INS syste m, a GPS is u sually employed simultaneously with an INS in order to increase the dimension of the system; the desired parameters are estimated by the Kalman filtering technique applied to the enlarged system. In this paper, we prese nt a st ruct ure con sistin g of a Kal man Filter (KF) of whi ch t he input is the difference between the noisy INS output and the noisy GPS output; the output of KF is finally introduced into the unaided INS system. In this structure, INS errors are compensated by a feedforward and a feedback loop. The overall performance of the system is analyzed by simulation; and results show that this technique substantially improves the quality of the navigation and guidance systems.Duc Tan Trantantd@vnu.edu.vnHuu Tue HuynhThang Long Nguyenlongnt@vnu.edu.vnPhu Thuy Nguyenthuynp@vnu.edu.vnVan Chuc Nguyenchucnv@gmail.com2015-04-03T16:21:59Z2017-12-12T13:59:05Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/411This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/4112015-04-03T16:21:59ZStudy on 2-lever DRIE for 3D MEMS structuresJ. WeiDuc-Trinh Chutrinhcd@vnu.edu.vnPM Sarro2012-12-26T05:41:05Z2013-06-29T04:31:42Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/93This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/932012-12-26T05:41:05ZErrors Determination of the MEMS IMUDuc Tan Trantantd@vnu.edu.vn2012-02-16T09:28:18Z2017-01-17T02:44:08Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/29This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/292012-02-16T09:28:18ZA DFT Architecture for Asynchronous Networks-on-ChipXuan Tu Trantutx@vnu.edu.vnVincent BeroulleFrançois BertrandJean DuruptChantal Robach2011-05-11T04:24:41Z2017-01-17T02:46:01Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/27This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/272011-05-11T04:24:41ZDesign-for-Test of Asynchronous Networks-on-ChipThanks to many advantages, asynchronous circuits have been used to solve the interconnect problems faced by system-on-chip (SoC) designers. Some asynchronous Networks-on-Chip (NoCs) architectures are proposed for the communication
within SoCs, but lack methodology and support for manufacturing test to ensure these communication architectures work correctly. In this paper, we present an innovative asynchronous DfT architecture that allows to test the asynchronous communication network architectures, as well as the synchronous computing resources and the asynchronous/synchronous network interfaces on the asynchronous NoC-based SoCs. This asynchronous DfT
architecture is implemented in Quasi Delay Insensitive (QDI)
asynchronous circuits and uses an area of about 20*8 KGates
in an asynchronous NoC-based SoC of 4.5 MGates without
memories.Xuan Tu Trantutx@vnu.edu.vnVincent BeroulleJean DuruptChantal RobachFrançois Bertrand