ppxscal/embedding_network huggingface dataset:
Location disclosure to social relations: why, when, & what people want to share
Authors: Sunny Consolvo, Ian E. Smith, Tara Matthews, Anthony LaMarca, Jason Tabert, Pauline Powledge
Venue: Proceedings of the SIGCHI conference on Human factors in computing systems (2005)

Advances in location-enhanced technology are making it easier for us to be located by others. These new technologies present a difficult privacy tradeoff, as disclosing one's location to another person or service could be risky, yet valuable. To explore whether and what users are willing to disclose about their location to social relations, we conducted a three-phased formative study. Our results show that the most important factors were who was requesting, why the requester wanted the participant's location, and what level of detail would be most useful to the requester. After determining these, participants were typically willing to disclose either the most useful detail or nothing about their location. From our findings, we reflect on the decision process for location disclosure. With these results, we hope to influence the design of future location-enhanced applications and services.
IEEE-Compliant IDCT on FPGA-Augmented TriMedia
Authors: Mihai Sima, Sorin Coţofaná, Jos T. Eijndhoven, Stamatis Vassiliadis, Kees Vissers
Venue: Journal of VLSI Signal Processing Systems (2005)

This paper presents a TriMedia processor extended with an IDCT reconfigurable design, and assesses the performance gain such an extension has when performing MPEG-2 decoding. We first propose the skeleton of an extension of the TriMedia architecture, which consists of a Field-Programmable Gate Array (FPGA)-based Reconfigurable Functional Unit (RFU), a Configuration Unit managing the reconfiguration of the RFU, and their associated instructions. Then, we address the computation of the 8 × 8 (2-D) IDCT on such extended TriMedia and propose a scheme to implement the 1-D IDCT operation on the RFU. When mapped on an ACEX EP1K100 FPGA from Altera, the proposed 1-D IDCT exhibits a latency of 16 and a recovery of 2 TriMedia@200 MHz cycles, and occupies 45% of the logic cells of the device. By configuring the 1-D IDCT on the RFU at application launch-time, the IEEE-compliant 2-D IDCT can be computed with the throughput of 1/32 IDCT/cycle. This figure translates to an improvement over the standard TriMedia of more than 40% in terms of computing time when 2-D IDCT is carried out in the framework of MPEG-2 decoding. Finally, the proposed reconfigurable IDCT is compared to a number of existing designs.
Power Quality Disturbance Detection Using Artificial Intelligence: A Hardware Approach
Authors: F. Choong, M. B. I. Reaz, F. Mohd-Yasin
Venue: Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Workshop 3 - Volume 04 (2005)

Identification and classification of voltage and current disturbances in power systems is an important task in power system monitoring and protection. Most power quality disturbances are non-stationary and transitory and the detection and classification have proved to be very demanding. New intelligent system technologies using wavelet transform, expert systems and artificial neural networks provide some unique advantages regarding fault analysis. This paper presents new approach aimed at automating the analysis of power quality disturbances including sag, swell, transient, fluctuation, interruption and normal waveform. The approach focuses on the application of discrete wavelet transform technique to extract features from disturbance waveforms and their classification using a powerful combination of neural network and fuzzy logic. The system is modelled using VHDL followed by extensive testing and simulation to verify the correct functionality of the system. Then, the design is synthesized to APEX EP20K200EBC652-1X FPGA, tested and validated. Comparisons, verification and analysis made from the results obtained from the application of this system on software-generated and utility sampled disturbance signals validate the utility of this approach and achieved a classification accuracy of 98.17%.
Software system for simulation of electric power processes in photovoltaic-hybrid system
Authors: Katerina Gabrovska, Andreas Wagner, Nikolay Mihailov
Venue: Proceedings of the 5th international conference on Computer systems and technologies (2004)

The software system for modeling and simulation of the processes of electric power conversion in Photovoltaic-hybrid energy system is described. The electrical models and characteristics of photovoltaic generator and other system components are included in the program algorithm. The application of the developed system is for research of the processes of electricity supply and is intended for agricultural farms. It can be utilized in designing of the real farms as well as in the process of students' education.
Positive active XML
Authors: Serge Abiteboul, Omar Benjelloun, Tova Milo
Venue: Proceedings of the twenty-third ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems (2004)

The increasing popularity of XML and Web services have given rise to a new generation of documents, called Active XML documents (AXML), where some of the data is given explicitly while other parts are given intensionally, by means of embedded calls to Web services. Web services in this context can exchange intensional information, using AXML documents as parameters and results.The goal of this paper is to provide a formal foundation for this new generation of AXML documents and services, and to study fundamental issues they raise. We focus on Web services that are (1) monotone and (2) defined declaratively as conjunctive queries over AXML documents. We study the semantics of documents and queries, the confluence of computations, termination and lazy query evaluation.
An Empirical Approach for the Evaluation of Haptic Algorithms
Authors: Chris Raymaekers, Joan De Boeck, Karin Coninx
Venue: Proceedings of the First Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2005)

The number of haptic algorithms has been growing over the past few years. However, little research has been performed in evaluating these algorithms. This paper provides a discussion of how force-feedback algorithms can be empirically evaluated for correctness and performance.
Skateboards, Bicycles, and Three-dimensional Biped Walking Machines: Velocity-dependent Stability by Means of Lean-to-yaw Coupling
Authors: M. Wisse, A. L. Schwab
Venue: International Journal of Robotics Research (2005)

One of the great challenges in the development of passive dynamic walking robots (useful for an understanding of human gait and for future applications in entertainment and the like) is the stabilization of three-dimensional motions. This is a difficult problem due to the inherent interaction between fore-aft motions and sideways motions. In this paper we propose a simple solution. Conceptually, one can avert a sideways fall by steering in that direction, similar to skateboards and bicycles. We propose to implement this concept for walking robots by the introduction of an ankle joint that kinematically couples lean to yaw. The ankle joint has an unusual orientation; its axis points forward and downward, without any left-right component. The effect of the ankle joint is investigated in a simple three-dimensional model with three internal degrees of freedom: one at the hip and two at the ankles. It has cylindric feet and an actuator at the hip joint, which quickly moves the swing leg to a preset forward position. The simulations show that it is easy to find a stable configuration, and that the resultant walking motion is highly robust to disturbances. Similar to skateboards and bicycles, there exists a critical velocity (as a function of the parameters) above which stable walking motions occur. The critical velocity can be lower for a more vertical ankle axis orientation. As an additional benefit, the ankle joint allows a straightforward implementation for steering; a simple sideways offset of the mass distribution will cause the model to gently steer in that direction. The results show great potential for the construction of a real-world prototype with the proposed ankle joint.
Application of Binary Translation to Java Reconfigurable Architectures
Authors: Antonio C. S. Beck, Luigi Carro
Venue: Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Workshop 3 - Volume 04 (2005)

In this paper we present the impact of applying binary translation to a reconfigurable architecture able to execute Java bytecodes. Besides ensuring software compatibility and porting for different machines tracking technological evolutions, the dynamic transformation of any sequence of instructions in combinational logic allows for meaningful energy savings andis totally transparent for the software designer. Moreover, we can speed up even code without a high level of parallelism available, in order of 3.5 times on average, and up to 6.5 times, spending 14 times less energy, in average. We present first studies about the impact on power and area of this technique and compare our architecture with a couple of other Java architectures, including a VLIW one. Our work uses a coarse-grain array, ensuring fast reconfiguration and less control overhead.
Virtual Cochlear Implant Insertion for Medical Education
Authors: Catherine Todd, Fazel Naghdy
Venue: Proceedings of the First Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2005)

A surgical simulator has been developed for the purpose of training otologists in cochlear implantation. The simulation provides real-time visual and haptic feedback during implant insertion into the human Scala Tympani (ST). The benefits and possible outcomes for this type of simulator are presented. Methods for model generation are discussed, for anatomical and prosthetic structures used in the simulation. Development of the interactive model with force-feedback is presented, with results.
Strict nonblockingness of reduced shuffle-exchange networks
Authors: F. K. Hwang, Binwu Zhang
Venue: Networks (2005)

The shuffle-exchange network is one of the most well-studied multistage interconnection networks. Whether a &lpar;2n - 1&rpar;-stage shuffle-exchange network is rearrangeable has been a challenging conjecture for some 30 years, and only recently a proof was claimed. In this article, we use the analysis method developed for EGSN networks to show that the shuffle-exchange network can be strictly nonblocking by deleting some inputs and outputs. &copy; 2004 Wiley Periodicals, Inc. NETWORKS, Vol. 45&lpar;1&rpar;, 4&ndash;8 2005This research was done when the author was visiting the Center of Mathematical Sciences, Zhejiang Univ., Hangzhou, P.R. China
Integrating Haptics into an Immersive Environment for the Segmentation and Visualization of Volumetric Data
Authors: Steven Senger
Venue: Proceedings of the First Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2005)

We present a haptically enabled immersive environment for the segmentation and visualization of volumetric data. The environment uses a client/server design and allows multiple, remotely separated users to work in a shared visual space. The environment incorporates several distinct segmentation methods that are based on the local application of computationally expensive algorithms and provides the user with continuous fine-grained control. The environment uses haptic feedback to both provide a sense of touch for segmented structures and to provide additional user control over the segmentation algorithms.
Edge partition of planar sraphs into two outerplanar graphs
Authors: Daniel Gonçalves
Venue: Proceedings of the thirty-seventh annual ACM symposium on Theory of computing (2005)

An outerplanar graph is a planar graph that can be embedded in the plane without crossing edges, in such a way that all the vertices are on the outer boundary. In this paper, we prove a conjecture of Chartrand, Geller, and Hedetniemi that any planar graph G=(V,E) has a bipartition of its edge set E = A ∪ B such that the graphs induced by these subsets, G[A] and G[B], are outerplanar.
Approximation algorithms for array partitioning problems
Authors: S. Muthukrishnan, Torsten Suel
Venue: Journal of Algorithms (2005)

We study the problem of optimally partitioning a two-dimensional array of elements by cutting each coordinate axis into p (respectively, q) intervals, resulting in p × q rectangular regions. This problem arises in several applications in databases, parallel computation, and image processing. Our main contribution are new approximation algorithms for these NP-complete problems that improve significantly over previously known bounds. The algorithms are fast and simple, work for a variety of measures of partitioning quality, generalize to dimensions d > 2, and achieve almost optimal approximation ratios. We also extend previous NP-completeness results for this class of problems.
Designing Zero-Copy Message Passing Interface Derived Datatype Communication Over Infiniband: Alternative Approaches and Performance Evaluation
Authors: Gopalakrishnan Santhanaraman, Jiesheng Wu, Wei Huang, Dhabaleswar K. Panda
Venue: International Journal of High Performance Computing Applications (2005)

In this paper, we present a new scheme, Send Gather Receive Scatter (SGRS), to perform zero-copy datatype communication over InfiniBand. This scheme leverages the gather/scatter feature provided by InfiniBand channel semantics. It takes advantage of the capability of processing non-contiguity on both send and receive sides in the Send Gather and Receive Scatter operations. We have implemented this new design and evaluated the performance for Message Passing Interface level point-to-point microbenchmarks and collectives, on PCI-X and upcoming high performance PCI-Express systems. In our previous work we had come up with an alternate zero-copy approach using multiple RDMA Writes (Multi-W). Compared to the existing Multi-W zero-copy datatype scheme, the SGRS scheme can overcome the drawbacks of low network utilization and high startup cost. On PCI-X platforms, our experimental results show significant improvement in both point-to-point and collective datatype communication. The latency of a vector datatype can be reduced by up to 62% and the bandwidth shows improvement up to 400% as compared with the Multi-W scheme. The Alltoall collective shows up to 23% reduction in latency. Further, the SGRS scheme shows low CPU overhead with a potential promise for better computation and communication overlap. The experimental results on PCI-Express platforms demonstrate the relevance of zero-copy protocols to overcome memory bandwidth limitations. The trends we observe in PCI-X platform are magnified on PCI-Express platforms with even higher improvement for the microbenchmarks and collectives.
Adaptive Inter-System Handover for Heterogeneous RF and IR Networks
Authors: Jindong Hou, D. C. O'Brien
Venue: Proceedings of the 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Workshop 1 - Volume 02 (2005)

Due to the complementary nature of radio and optical wireless (infrared) both in capacity and coverage, the combined use of both for data transmission could have advantages over a single technique. Varying network and traffic conditions put a big challenge on the mobility management of such an integrated network. The strength of fuzzy logic is employed by proposed vertical handover (VHO) scheme to handle uncertainty and achieve an excellent performance under all studied circumstances.
Virtualization of Linux Based Computers: The Linux-VServer Project
Authors: Benoit des Ligneris
Venue: Proceedings of the 19th International Symposium on High Performance Computing Systems and Applications (2005)

This article presents the available programs that can provide, with different technology, a virtualization of Linux computers.We will define some usage criteria that will allow the reader to chose the relevant virtualization technology according to its specific needs. In the second part of the article we will focus on the Linux-VServer technology, which is a very lightweight and effective technology for the regular Linux user not interested in Kernel hacking. The Linux-VServer project also supports additional security options and resources limitation that can be very useful. This is also the most mature open-source technology and several users have production servers using this technology for years now.
From the workstation to the mobile phone: multi-target interface design
Authors: David Thevenin
Venue: Proceedings of the 15th French-speaking conference on human-computer interaction on 15eme Conference Francophone sur l'Interaction Homme-Machine (2003)

Tools for multitarget generation such as ARTStudio lack flexibility for generation. In this paper we present a dynamic adaptation to achieve more interactive edition and generation. We present requirements for adaptation and a preliminary implementation based on a numerical constraints solver.
Using Unfamiliar Platforms in Software Engineering Projects
Authors: Gregory A. Hall
Venue: Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC'05) - Volume II - Volume 02 (2005)

This experience report describes the use of programming projects for handheld devices within software engineering project classes. There are several benefits associated with using an unfamiliar platform and development tools in upper-level software engineering courses. The student's lack of familiarity with the development environment forces more time to be spent early on in the requirements and design of the project. In addition, the increasing popularity of mobile computing devices has made handheld programming experience valuable tograduating students in their job searches. This paper addresses the motivation for using handheld device programming projects, the technical issues associated with such projects, and the results of several semesters worth of teaching experience and student feedback.
Automatic Face Recognition for Film Character Retrieval in Feature-Length Films
Authors: Ognjen Arandjelovic, Andrew Zisserman
Venue: Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01 (2005)

The objective of this work is to recognize all the frontal faces of a character in the closed world of a movie or situation comedy, given a small number of query faces. This is challenging because faces in a feature-length film are relatively uncontrolled with a wide variability of scale, pose, illumination, and expressions, and also may be partially occluded. We develop a recognition method based on a cascade of processing steps that normalize for the effects of the changing imaging environment. In particular there are three areas of novelty: (i) we suppress the background surrounding the face, enabling the maximum area of the face to be retained for recognition rather than a subset; (ii) we include a pose refinement step to optimize the registration between the test image and face exemplar; and (iii) we use robust distance to a sub-space to allow for partial occlusion and expression change. The method is applied and evaluated on several feature length films. It is demonstrated that high recall rates (over 92%) can be achieved whilst maintaining good precision (over 93%).
HyperSoft System: Tool Demonstration and Use Example
Authors: Jussi Koskinen
Venue: Proceedings of the 13th International Workshop on Program Comprehension (2005)

HyperSoft is an approach for satisfying the information needs of software maintainers. HyperSoft combines the notions of automated program analysis and hypertext techniques. HyperSoft system is the implementation of the approach. It is targeted at supporting the comprehension of large programs and has been developed in cooperation with software industry. HyperSoft produces automatically transient access structures, which deliver to the users the needed information. Access structures are presented to the users via various textual, hypertextual, structural and graphical views. This paper and tool demonstration describe the tool use and applied interaction techniques.
Network simulation
Authors: Anne Roberts
Venue: Journal of Computing Sciences in Colleges (2004)

This web accessible application simulates a multicast routing algorithm called reverse path forwarding that is taught in Computer Networks (COSC 3344) at St. Edward's University. The client is Dr. James McGuffee, an Assistant Professor of Computer Science. This graphical simulation is being created using the Java programming language. This application will be designed to help students of Computer Networks learn about the reverse path forwarding multicast routing algorithm. The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
Models and processes for the evaluation of off-the-shelf components -- MPEC'05
Authors: Lawrence Chung, Xavier Franch, Neil Maiden
Venue: Proceedings of the 27th international conference on Software engineering (2005)

This workshop summary presents an overview of the one-day International Workshop on Models and Processes for the Evaluation of off-the-shelf Components (MPEC'05), held in conjunction with the 27th International Conference on Software Engineering (ICSE'05). Details about MPEC'05 may be found at http://www.lsi.upc.edu/events/mpec/.
A View on Decoherence Via Master Equations
Authors: Rolando Rebolledo
Venue: Open Systems Information Dynamics (2005)

This paper addresses the discussion on probabilistic features of the concept of decoherence as it appeared in quantum physics. Given a Lindblad-type generator of an open system dynamics, we derive applicable criteria to characterize decoherent behaviour.
Phonetic level annotation and segmentation of Hungarian speech databases
Authors: Gyula Zsigri, András Kocsor, László Tóth, Györgyi Sejtes
Venue: Acta Cybernetica (2004)

The purpose of this paper is to give an outline of phonetic level annotation and segmentation of Hungarian speech databases at the levels of definition and speech technology. In addition to giving guidance to the definition of the content of a database, the technique of annotation and the procedure of manual segmentation, we also discuss mathematical models of computer-aided semi-automatic and automatic segmentation. Finally, we are summing up our observations about the application of the procedures we gained during the processing of the MTBA Hungarian Telephone Speech Database.
Designing the spectator experience
Authors: Stuart Reeves, Steve Benford, Claire O'Malley, Mike Fraser
Venue: Proceedings of the SIGCHI conference on Human factors in computing systems (2005)

Interaction is increasingly a public affair, taking place in our theatres, galleries, museums, exhibitions and on the city streets. This raises a new design challenge for HCI - how should spectators experience a performer's interaction with a computer? We classify public interfaces (including examples from art, performance and exhibition design) according to the extent to which a performer's manipulations of an interface and their resulting effects are hidden, partially revealed, fully revealed or even amplified for spectators. Our taxonomy uncovers four broad design strategies: 'secretive,' where manipulations and effects are largely hidden; 'expressive,' where they tend to be revealed enabling the spectator to fully appreciate the performer's interaction; 'magical,' where effects are revealed but the manipulations that caused them are hidden; and finally 'suspenseful,' where manipulations are apparent but effects are only revealed as the spectator takes their turn.