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2010 3rd International Conference on Human-Centric Computing, HumanCom 2010

作者： Manguni Jr., Reynaldo Navarro, Mel Leandro Rosario, Kathleen Festin, Cedric Angelo Department of Computer Science Networks and Distributed Systems Group University of Philippines Diliman Quezon City Philippines

ISBN: (纸本)9781424475704

Community Health Information Tracking System using Short Message Service (chitSMS) is an extension of CHITS which is a system that stores health records of patients in the barangay. Another project incorporated a mobile component in CHITS, enabling the health worker to visit the patient, do routine check-ups and medical services, and update CHITS when the health worker returns to the health center. Without a remote connection, however, the health worker has to return frequently to the usually distant health center to update the CHITS database with the data gathered from the field consult. chitSMS addresses this by using SMS as a mode of remote data transfer. It ensures the reliable transmission of the data by implementing a modified selective repeat protocol. Furthermore, it performs the Deflate algorithm for compression of the data being sent to minimize the cost. © 2010 IEEE.

关键词： Data transfer

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Utilization of Database Spatial Queries for Region of Interest Extraction in Stored Images

Utilization of Database Spatial Queries for Region of Intere...

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2022 IEEE Region 10 International Conference, TENCON 2022

作者： Valdez, Julian Troy C. Tan, Wilson M. University of the Philippines Diliman Department of Computer Science Networks and Distributed Systems Group Quezon City Philippines

ISBN: (数字)9781665450959

ISBN: (纸本)9781665450959

Image processing, specifically extracting regions of interest, being a costly operation would benefit from a method of storing its output region and input image data in a database for future querying so as to prevent re-execution of the processing operation. This study investigates the performance of using built-in spatial queries found in a couple of modern Database systems to store and retrieve specific regions of image data. After testing two widely used Database software: MongoDB and Postgresql, results have shown that MongoDB performs better in terms of average and tail latency as well as efficiency in disk space consumption. © 2022 IEEE.

关键词： Query processing

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WifiGO: Assessment of PUV Viability for Opportunistic Coverage Mapping of WiFi networks

WifiGO: Assessment of PUV Viability for Opportunistic Covera...

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2024 IEEE International Conference on Internet of Things and Intelligence systems, IoTaIS 2024

作者： Pecson, Jeff Nereo G. Tan, Wilson M. Festin, Cedric Angelo M. Dulva, Philip Angelo Y. Networks and Distributed Systems Group Department of Computer Science University of the Philippines - Diliman Metro Manila Philippines

ISBN: (纸本)9798331521219

Current methods in mapping the availability of WiFi networks, such as crowdsourcing platforms (e.g. Project BASS and CoverageMap) and dedicated wardriving, face limitations in terms of data recency, volume, and cost-effectiveness. Due to the downsides of both these methods, opportunistic wardriving is proposed which utilizes public utility vehicles (PUVs). This study investigates the feasibility of PUVs as potential wardriving vehicles for opportunistic coverage mapping. This method is cost-efficient and removes the problem of data recency because of its continuous daily trips. The findings suggest that opportunistic wardriving with PUVs is viable for wardriving with its capability to detect a high volume of access points (APs). Multiple runs within the University of the Philippines Diliman campus showed the PUVs’ effectiveness in detecting a significant number of APs, with higher success rates at closer distances. Comparatively, warwalking detected fewer APs, but there was a significant overlap between the methods. The study also highlighted significant differences in detected AP types, with wardriving finding more mobile hotspots and miscellaneous devices than warwalking. Overall, the results underline the effectiveness of PUVs in providing extensive WiFi coverage data and further enhancements to the detection system could optimize the approach. ©2024 IEEE.

关键词： Wireless local area networks (WLAN)

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On the Integration of Adaptive and Interactive Robotic Smart Spaces

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Paladyn 2015年第1期6卷 165-179页

作者： Dragone, Mauro Saunders, Joe Dautenhahn, Kerstin Distributed System Group School of Computer Science and Statistics Trinity College Dublin Ireland Adaptive Systems Research Group Science and Technology Research Institute University of Hertfordshire United Kingdom

Enabling robots to seamlessly operate as part of smart spaces is an important and extended challenge for robotics R&D and a key enabler for a range of advanced robotic applications, such as AmbientAssisted Living (AAL) and home automation. The integration of these technologies is currently being pursued from two largely distinct view-points: On the one hand, people-centred initiatives focus on improving the user's acceptance by tackling human-robot interaction (HRI) issues, often adopting a social robotic approach, and by giving to the designer and-in a limited degree-to the final user(s), control on personalization and product customisation features. On the other hand, technologically-driven initiatives are building impersonal but intelligent systems that are able to pro-actively and autonomously adapt their operations to fit changing requirements and evolving users' needs, but which largely ignore and do not leverage human-robot interaction and may thus lead to poor user experience and user acceptance. In order to inform the development of a new generation of smart robotic spaces, this paper analyses and compares different research strands with a view to proposing possible integrated solutions with both advanced HRI and online adaptation capabilities. © 2015 Mauro Dragone et al.

关键词： Human robot interaction

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Rapid mobile development with ARC: Application framework for robust communications for disaster risk reduction and management 12

Rapid mobile development with ARC: Application framework for...

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12th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob 2016

作者： Santos, Jan Vincent Torres, Danah Veronica Villanoy, Monica Kathrina Festin, Cedric Angelo Doctor, John Norman Ocampo, Roel Networks and Distributed Systems Group Department of Computer Science University of the Philippines Philippines Computer Networks Laboratory Electrical and Electronics Engineering Institute University of the Philippines Philippines

ISBN: (纸本)9781509007240

In disaster situations communication and power infrastructure could be damaged, disrupting their associated services. This could delay relief efforts and cost more lives. In situations where connections are damaged and unreliable, peer-to-peer (P2P) and delay-tolerant networking (DTN) technologies can help provide alternative communication modes particularly in support of rescue and relief operations. Combining the benefits of the store-and-forward capability of DTN and the data propagation techniques of Wi-Fi Direct, we have created a flexible framework called ARC which allows users to create applications that could meet their specific requirements, particularly those in support of emergency communications. To demonstrate our framework, we created a simple application using ARC, and used this application to evaluate its DTN and Wi-Fi Direct group recovery capabilities. © 2016 IEEE.

关键词： Wireless local area networks (WLAN)

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Coordinated VANET Experiments - a Methodology and First Results

Coordinated VANET Experiments - a Methodology and First Resu...

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6th ACM International Workshop on Vehicular Inter-Networking

作者： Kerper, Markus Kiess, Wolfgang Mauve, Martin Driver Information Systems Volkswagen Group Research Germany Computer Networks Group University of Düsseldorf Germany

ISBN: (纸本)9781605587370

Many applications for inter-vehicular communication require a very specific test situation in order to be evaluated during a real world experiment. However, in the currently prevailing free-flow experiments the intended situation for the application may not occur in sufficient frequency to provide statistically significant results. In this paper, we argue that the existing experimental approach should therefore be complemented with coordinated experiments. This allows to specifically create the desired test situation. We present a methodology for such controlled experiments. The key to those experiments is the exact coordination of the participating cars' movements as well as a detailed control over all used soft- and hardware. To illustrate this methodology, we have performed an experiment with two cars that simultaneously approach an urban intersection and measured the radio transmission ranges with and without a road side unit. The results show that cars equipped with communication technology can inform their drivers about the approaching other cars up to ten seconds before a possible accident at such an intersection.

关键词： VANET Experiment design Real-World Measurements Intersection

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Driving More Efficiently - The Use of Inter-Vehicle Communication to Predict a Future Velocity Profile

Driving More Efficiently - The Use of Inter-Vehicle Communic...

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73rd IEEE Vehicular Technology Conference (VTC Spring)

作者： Kerper, Markus Wewetzer, Christian Trompeter, Holger Kiess, Wolfgang Mauve, Martin Driver Information Systems Research Volkswagen Group Germany Computer Networks Group University of Düsseldorf Germany

ISBN: (纸本)9781424483310

Fuel-efficient driving is difficult in unknown or complex environments. To aid the driver with this task, we present a novel method of tactical route optimization by calculating a short-term fuel-reduced velocity profile. This profile is based on knowledge of location-dependent velocity profiles that are collected by the vehicles over time and shared with other vehicles. To determine a fuel-efficient velocity profile, we first split the planned route into segments. We cluster the historical velocity profiles within each segment using a Dynamic Time Warping algorithm, obtaining classes of velocity profiles and their probabilities. We construct a transition graph between velocity profile classes from adjacent segments and calculate the most probable path through the next segments ahead. This path represents the most likely future velocity profile under the assumption that the driver behaves like previous drivers on the same segment. Given the constraints defined by this profile, we calculate the fuel-reduced velocity profile with help of a shortest-path algorithm in a vehicle-specific fuel-consumption graph. First results in an urban environment indicate possible fuel savings of about 8.3% compared to the most probable profile.

关键词： Clustering algorithms Driver circuits Fuels Optimization Probes Vehicle dynamics Vehicles

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Resilient routing layers for network disaster planning

Resilient routing layers for network disaster planning

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Networking - ICN 2005

作者： Hansen, Audun Fosselie Kvalbein, Amund Čičicá, Tarik Gjessing, Stein Networks and Distributed Systems Group Simula Research Laboratory Oslo Norway Telenor R and D Oslo Norway

Most research on network recovery has been centered around two common assumptions regarding failure characteristics: Failures do not occur simultaneously and failures do mostly strike links. Even this may be the characteristics of everyday failures, we argue that disasters like earthquakes, power outages and terrorist attacks impose other failure characteristics. In this paper we demonstrate how our method, called 'Resilient Routing Layers', can be used as a tool for recovery from failures adhering to such disaster characteristics. © Springer-Verlag Berlin Heidelberg 2005.

关键词： computer system recovery

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HRT-HOOD - A STRUCTURED DESIGN METHOD FOR HARD REAL-TIME systems

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REAL-TIME systems 1994年第1期6卷 73-114页

作者： BURNS, A WELLINGS, AJ 1. Real-time and Distributed Systems Research Group Department of Computer Science University of York YO1 5DD Heslington York UK

Most structured design methods claim to address the needs of hard real-time systems. However, few contain abstractions which directly relate to common hard real-time activities, such as periodic or sporadic processes. Furthermore, the methods do not constrain the designer to produce systems which can be analyzed for their timing properties. In this article we present a structured design method called HRT-HOOD (Hard Real-Time Hierarchical Object Oriented Design). HRT-HOOD is an extension of HOOD, and includes object types which enable common hard real-time abstractions to be represented. The method is presented in the context of a hard real-time system life cycle, which enables issues of timeliness and dependability to be addressed much earlier on in the development process. We argue that this will enable dependable real-time systems to be engineered in a more cost effective manner than the current practice, which in effect treats these topics as performance issues. To illustrate our approach we present a simple case study of a Mine Drainage Control System, and show how it can be designed using the abstractions presented in the article.

关键词： Real time systems

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Enhancing the Web's infrastructure: From caching to replication

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IEEE Internet Computing 1997年第2期1卷 18-27页

作者： Baentsch, Michael Baum, Lothar Molter, Georg Rothkugel, Steffen Sturm, Peter University of Kaiserslautern Distributed Systems Research Group University of Kaiserslautern System Software Group University of Kaiserslautern System Software Group System Software Group Computer Science Department University of Kaiserslautern D-67653 Kaiserslautern Germany

Advances in directory services, caching and replication, and multicasting technologies promise to improve the speed and robustness of the Web's infrastructure. This article examines the technical issues of two imp... 详细信息

关键词： Delay Web server Web sites Bandwidth Network servers Performance analysis System software Fault tolerant systems Robustness Usability

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