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In bit-patterned media recording (BPMR) channels at ultra high areal densities, the inter-track interference (ITI) is extremely severe, which significantly degrades the system performance. The partial-response maximum-likelihood (PRML) technique that uses a one-dimensional (1D) partial response target might not be able to cope with this severe ITI, especially in the presence of media noise and track...
Heuristic Mobility-Aware OLSR Protocol was designed for VANETs in which nodes rapidly changed in speed and direction. This protocol will be collecting information of adjacent nodes and interpreting as a routing cost. The sum of the routing cost of all nodes along a candidate route is to be a routing metric. The route with the minimum cost index is selected based on the key that the lower the routing...
Thermal asperity (TA) causes a crucial problem in magnetic recording systems because it can distort the readback signal to the extent of causing possible sector read failure. This problem becomes more severe in perpendicular recording channels because these channels contain a d.c. component. This paper presents a novel TA suppression method by use of a bandpass filter. We also investigate the effect...
Many capital cities in the world encounter the similar problem of traffic jam due to the population growth and the need for transportation. Bangkok, Thailand is one of the top cities with serious traffic jam. An inter vehicle communication was proposed to provide the real time road information to realize the intelligent transportation system (ITS) with the hope to mitigate the serious traffic jam...
Telemedicine is a future trend of medical care due to the increasing cost of treatment and the aging of population around the world. Several telecommunication technologies are proposed for transferring medical data between a point of care and a hospital; however, full mobility of patients needed to be attached with wired monitoring devices is not provided. In this paper, we proposed a wireless three-lead...
Telemedicine is a future trend of medical care due to the increasing cost of treatment and the aging of population around the world. Several telecommunication technologies are proposed for transferring medical data between a point of care and a hospital. However, it does not provide full mobility where a patient still needs to be attached with wired monitoring devices. In this paper, we proposed a...
This research proposes a traffic report system via a GSM mobile station by using SMS messaging to increase the efficiency of a traffic report system that offer us the comfortable and rapid report system. Another part of this research is a problem-solving of Thai encoding between data from a mobile phone and a traffic database that uses different encodings. The structure of this traffic report system...
A location and tracking system becomes very important to our future world of pervasive computing, where information is all around us. Location is one of the most needed information for emerging and future applications. Since the public use of GPS satellite is allowed, several state-of-the-art devices become part of our life, e.g. a car navigator and a mobile phone with a built-in GPS receiver. However,...
Due to the high cost of fossil-based energy, several methods are proposed to reduce the usage of the energy in logistics and fleet management to be even more. GPS tracking system is a common approach to get vehicle location information in real-time for fleet planning. We proposed a GPS tracking system called Goo-Tracking that is composed of commodity hardware, open source software and an easy-to-manage...
A study on robustness of location determination techniques using wireless sensor network (WSN) is presented in this manuscript. The location estimation technique used by the wireless sensor network is based on location fingerprinting technique. Theoretically, the robustness of the location estimation depends on the availability of the number of sensor nodes in the system. The degradation of location...
By using a sleep schedule technique, S-MAC can reduce the energy consumption in a wireless sensor network; thus, breaking the network into a virtual cluster. Using a different sleep schedule in each cluster causes problems in the S-MAC protocol. This paper aims to investigate the appropriate cluster size for the wireless sensors networks (WSNs) in terms of the average node number per virtual cluster...
The fuzzy path selection is a framework for mobile ad hoc networks in which inaccurate information is available for making a routing decision. The goal of our path selection process is to identify a shortest path and to prolong the connectivity of the networks, using minimum hops and node remaining power as our model cost. Under an assumption that a list of candidate paths already exists, we explore...
This research proposes the methodology of detection and estimation of road congestion using cellular phones. We survey the road that is well-known as one of the most congested roads in Bangkok, Thailand. In our survey, we collect two kinds of information, Cell Dwell Time (CDT) using a cellular phone and velocity and position using Global Position System (GPS). To categorize CDT according to Cell Coverage...
This research proposes the methodology of detection and estimation of road congestion using cellular phones. We survey the road that is well-known as one of the most congested roads in Bangkok, Thailand. In our survey, we collect two kinds of information, cell dwell time (CDT) using a cellular phone and velocity and position using Global Position System (GPS). To categorize CDT according to cell coverage...
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