ppxscal/embedding_network huggingface dataset:
Contextual awareness based communication and coauthoring proximity in the internet
Authors: Dominique Decouchant, Gonzalo Escalada-Imaz, Ana Maria Martinez Enriquez, Sonia Mendoza, Aslam Muhammad
Venue: Expert Systems with Applications: An International Journal (2009)

Taking into account the number of works and studies developed, without any doubt, group awareness constitutes one of the keystones for designing and implementing a groupware application. This research focuses on the design and the development of a Group Awareness Knowledge based System (GAKS) whose aim is to provide elaborated and innovative awareness functions to enhance coauthoring of documents on the World Wide Web. The developed advanced awareness functionalities follow and take advantages of the knowledge based system principles to provide: (1) a synchronous/asynchronous contextual communication tool (related to coauthors' productions and interests), and (2) a detector of physical/logical work proximity that allows users to efficiently produce and coordinate their actions.
Usability, Aesthetics, and Efficiency: An Evaluation in a Multimedia Environment
Authors: Albert Badre, Anne Jacobs
Venue: Proceedings of the IEEE International Conference on Multimedia Computing and Systems - Volume 2 (1999)

Human computer interaction in the arena of multimedia is a vast topic. The sub-issues involved include the type of multimedia environment or application in question, the personal history and characteristics of the individual user, the reasons that he or she is employing the multimedia tool, and the surroundings in which he or she is working. In this paper, we look at the role that aesthetics plays in user satisfaction, productivity, and efficiency. Our inquiry focuses on the question of whether the usability of a multimedia web site includes the requirements: a) that the site visitors should "feel" they are visiting an actual physical site, and b) that their site visit experience becomes more like the real experience as the site environment is made ecologically richer. The particular context within which we explore this usability question is that of museum web sites.
Performance of frame synchronization symbols for an OFDM-based wireless data communication system
Authors: Ali A. Eyadeh
Venue: Proceedings of the 7th conference on Data networks, communications, computers (2008)

For an orthogonal frequency division multiplexing (OFDM) system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. In this paper two synchronization symbols are proposed to achieve frame synchronization for an OFDM-based indoor wireless data transmission system, the wobbulation symbol and the Barker code. The performance of these two synchronization symbols has been analyzed and compared, under the influence of an AWGN and two-ray multipath channels, in terms of the probability of correct synchronization.
An application of parallel Monte Carlo modeling for real-time disease surveillance
Authors: David W. Bauer,  Jr., Mojdeh Mohtashemi
Venue: Proceedings of the 40th Conference on Winter Simulation (2008)

The global health, threatened by emerging infectious diseases, pandemic influenza, and biological warfare, is becoming increasingly dependent on the rapid acquisition, processing, integration and interpretation of massive amounts of data. In response to these pressing needs, new information infrastructures are needed to support active, real time surveillance. Detection algorithms may have a high computational cost in both the time and space domains. High performance computing platforms may be the best approach for efficiently computing these algorithms. Unfortunately, these platforms are unavailable to many health care agencies. Our work focuses on efficient parallelization of outbreak detection algorithms within the context of cloud computing as a high throughput computing platform. Cloud computing is investigated as an approach to meet real time constraints and reduce or eliminate costs associated with real time disease surveillance systems.
A Logic Programming Approach to Home Monitoring for Risk Prevention in Assisted Living
Authors: Alessandra Mileo, Davide Merico, Roberto Bisiani
Venue: Proceedings of the 24th International Conference on Logic Programming (2008)

Monitoring a patient in his home environment is necessary to ensure continuity of care in home settings, but this activity must not be too much invasive and a burden for clinicians. For this reason we prototyped a system called SINDI (Secure and INDependent lIving), focused on i) collecting a limited amount of data about the person and the environment through Wireless Sensor Networks (WSN), and ii) reasoning about these data both to contextualize them and to support clinicians in understanding patients' well being as well as in predicting possible evolutions of their health. Our hierarchical logic-based model of health combines data from different sources, sensor data, tests results, commonsense knowledge and patient's clinical profile at the lower level, and correlation rules between aspects of health (items) across upper levels. The logical formalization and the reasoning process are based on Answer Set Programming. The expressive power of this logic programming paradigm allows efficient reasoning to support prevention, while declarativity simplifies rules specification by clinicians and allows automatic encoding of knowledge. This paper describes how these issues have been targeted in the application scenario of the SINDI system.
Bio-molecular computing of finite-state machine
Authors: Yasubumi Sakakibara
Venue: Proceedings of the 3rd International Conference on Bio-Inspired Models of Network, Information and Computing Sytems (2008)

We overview a series of our research on implementing finite automata in vitro and in vivo in the framework of DNA-based computing [2, 3]. First, we employ the length-encoding technique proposed and presented in [5, 4] to implement finite automata in test tube. In the length-encoding method, the states and state transition functions of a target finite automaton are effectively encoded into DNA sequences, a computation (accepting) process of finite automata is accomplished by self-assembly of encoded complementary DNA strands, and the acceptance of an input string is determined by the detection of a completely hybridized double-strand DNA. Second, We report our intensive in vitro experiments in which we have implemented and executed several finite-state automata in test tube. We have designed and developed practical laboratory protocols which combine several in vitro operations such as annealing, ligation, PCR, and streptavidin-biotin bonding to execute in vitro finite automata based on the length-encoding technique. We have carried laboratory experiments on various finite automata of from 2 states to 6 states for several input strings. Third, we present a novel framework to develop a programmable and autonomous in vivo computer using Escherichia coli (E. coli), and implement in vivo finite-state automata based on the framework by employing the protein-synthesis mechanism of E. coli. Our fundamental idea to develop a programmable and autonomous finite-state automata on E. coli is that we first encode an input string into one plasmid, encode state-transition functions into the other plasmid, and introduce those two plasmids into an E. coli cell by electroporation. Fourth, we execute a protein-synthesis process in E. coli combined with four-base codon techniques to simulate a computation (accepting) process of finite automata, which has been proposed for in vitro translation-based computations in [4]. This approach enables us to develop a programmable in vivo computer by simply replacing a plasmid encoding a state-transition function with others. Further, our in vivo finite automata are autonomous because the protein-synthesis process is autonomously executed in the living E. coli cell. We show some successful experiments to run an in vivo finite-state automaton on E. coli.
Understanding software approaches for GPGPU reliability
Authors: Martin Dimitrov, Mike Mantor, Huiyang Zhou
Venue: Proceedings of 2nd Workshop on General Purpose Processing on Graphics Processing Units (2009)

Even though graphics processors (GPUs) are becoming increasingly popular for general purpose computing, current (and likely near future) generations of GPUs do not provide hardware support for detecting soft/hard errors in computation logic or memory storage cells since graphics applications are inherently fault tolerant. As a result, if an error occurs in GPUs during program execution, the results could be silently corrupted, which is not acceptable for general purpose computations. To improve the fidelity of general purpose computation on GPUs (GPGPU), we investigate software approaches to perform redundant execution. In particular, we propose and study three different, application-level techniques. The first technique simply executes the GPU kernel program twice, and thus achieves roughly half of the throughput of a non-redundant execution. The next two techniques interleave redundant execution with the original code in different ways to take advantage of the parallelism between the original code and its redundant copy. Furthermore, we evaluate the benefits of providing hardware support, including ECC/parity protection to on-chip and off-chip memories, for each of the software techniques. Interestingly, our findings, based on six commonly used applications, indicate that the benefits of complex software approaches are both application and architecture dependent. The simple approach, which executes the kernel twice, is often sufficient and may even outperform the complex ones. Moreover, we argue that the cost is not justified to protect memories with ECC/parity bits.
Heterogeneity in the usability evaluation process
Authors: Martin Schmettow
Venue: Proceedings of the 22nd British HCI Group Annual Conference on HCI 2008: People and Computers XXII: Culture, Creativity, Interaction - Volume 1 (2008)

Current prediction models for usability evaluations are based on stochastic distributions derived from series of Bernoulli processes. The underlying assumption of these models is a homogeneous detection probability despite of it being intuitively unrealistic. This paper contributes a simple statistical test for existence of heterogeneity in the process. The compound beta-binomial model is proposed to incorporate sources of heterogeneity and compared to the binomial model. Analysis of several data sets from the literature illustrates the methods and reveals that heterogeneity occurs in most situations. Finally, it is demonstrated how heterogeneity biases the prediction of evaluation processes. Open research questions are discussed and preliminary advice for practitioners for controlling their processes is given.
A cross-layer concurrent multi-path forward algorithm
Authors: Laiquan Han, Jinkuan Wang, Cuirong Wang
Venue: Proceedings of the 2008 International Conference on Advanced Infocomm Technology (2008)

The rapid development of communication technology, virtualization and programming router in the last few years have given rise to a strong research interest in Concurrent Multi-Path (CMP) technology. Based on the analysis of flow relation and forward granularity, a Cross-layer CMP Forward (CCF) algorithm is proposed. Compared with conventional single path forward and random CMP forward, NS2 simulations prove that CCF algorithm addresses the disorder problem and achieves a better throughput performance with a little process overhead, and the algorithm is easily deployed into the software of the router.
Tools and Products
Venue: IEEE Computer Graphics and Applications (2009)

This article looks at new hardware and software products and tools related to computer graphics.
Exploring virtual environments in a decentralized lab
Authors: Peng Li
Venue: ACM SIGITE Newsletter (2009)

Virtualization technology has been used in a decentralized manner to deliver hands-on labs in an intrusion detection course in the past three years. The availability of free virtualization software and low-cost but high-performance personal computers made it possible for students to run virtual machines and perform lab exercises on their own computers. Different virtualization options including VMware, Sun xVM VirtualBox and Virtual Computing Lab (VCL) were explored. Both VMware and VirtualBox were proven to be effective tools for lab purposes. The decentralized virtual lab approach and the centralized remote lab approach (ex. VCL) can be complementary.
Web-IDE
Authors: Gabriel Sofonea, Laurentiu Ciovica, Liviu Ciovica
Venue: Proceedings of the 12th WSEAS international conference on Computers (2008)

"Write once, run anywhere" (Java slogan created by Sun Microsystems) becomes now, "write once write anywhere, run anywhere" (Web-IDE slogan). This project deals with building a web based Java integrated development environment with full capabilities in editing and compiling java code. Among with the basic editing IDE functionalities this tool comes with two powerful extensions: a full operational GUI designer and builder module and a module for code logical representation.
Simulation and formal analysis of visual attention
Authors: Tibor Bosse, Peter-Paul van Maanen, Jan Treur
Venue: Web Intelligence and Agent Systems (2009)

In this paper a simulation model for visual attention is discussed and formally analysed. The model is part of the design of an agent-based system that supports a naval officer in its task to compile a tactical picture of the situation in the field. A case study is described in which the model is used to simulate a human subject's attention. The formal analysis is based on temporal relational specifications for attentional states and for different stages of attentional processes. The model has been automatically verified against these specifications.
A water hammer analysis of pressure and flow in the voice production system
Authors: D. Sciamarella, G. Artana
Venue: Speech Communication (2009)

The sudden pressure rise produced by glottal closure in the subglottal tract during vocal fold oscillation causes a flow transient which can be computed as a water hammer effect in engineering. In this article, we present a basic water hammer analysis for the trachea and the supralaryngeal tract under conditions which are analogue to those operating during voice production. This approach allows predicting both, the intra-oral and intra-tracheal pressure fluctuations induced by vocal fold motion, as well as the airflow evolution throughout the phonatory system.
A wireless real-time on-chip bus trace system
Authors: Shusuke Kawai, Takayuki Ikari, Yutaka Takikawa, Hiroki Ishikuro, Tadahiro Kuroda
Venue: Proceedings of the 2009 Asia and South Pacific Design Automation Conference (2009)

A 480Mb/s wireless real-time bus trace system with a pulse-based inductive coupling channel array was developed using a 0.25&mu;m CMOS digital process. The size and pitch of the inductor array are determined by numerical calculation to optimize the tradeoff between the channel coupling, crosstalk, and alignment tolerance. A low-power quasi-synchronous system is proposed to obtain an enough timing margin for RX pulse detection under the presence of the clock skew.
Hybrid Overlay Networks Management for Real-Time Multimedia Streaming over P2P Networks
Authors: Mubashar Mushtaq, Toufik Ahmed
Venue: Proceedings of the 10th IFIP/IEEE International Conference on Management of Multimedia and Mobile Networks and Services: Real-Time Mobile Multimedia Services (2008)

Recent growth of the multimedia content delivery over the Internet and the popularity of the peer-to-peer (P2P) architecture have opened new horizons for emerging novel services over the Internet. Currently, most of multimedia services are being offered to the end users by using set-top boxes installation on the client's premises, with integrated media storage capabilities and their adaptation. The organization of the end-clients in P2P fashion has great potential to change business models to offer new value-added multimedia services and therefore to generate substantial revenue for service providers. In this paper, we present a mechanism to organize the sender peers in hierarchical hybrid overlay networks. The objective of such organization is to facilitate the receiver peer (content consumer) to select best sender peers for the provision of better QoS (Quality of Service). To construct the hybrid overlay networks, peers offering the same video quality are placed together at the same level of overlay networks. The organization of sender peers within these overlays is subject to (1) the semantic of the video provided by the peer (base layer, or enhancement layers) and (2) the QoS offered by each peer along the end-to-end path. The proposed streaming mechanism is receiver-centric where receiver peer selects a number of sender peers from the overlay networks to receive media contents. The performance evaluation performed using ns-2 simulator shows that hybrid overlays organization mechanism is helpful to enhance the overall QoS by significant improvement in received video packets throughput, the packets drop ratio and transmission delay.
An implementation of parallel file distribution in an agent hierarchy
Authors: Munehiro Fukuda, Jumpei Miyauchi
Venue: The Journal of Supercomputing (2009)

PC grid is a cost-effective grid-computing platform that attracts users by allocating to their massively parallel applications as many desktop computers as requested. However, a challenge is how to distribute necessary files to remote computing nodes that may be unconnected to the same network file system, equipped with insufficient disk space to keep entire files, and even powered off asynchronously.Targeting PC grid, the AgentTeamwork grid-computing middleware deploys a hierarchy of mobile agents to remote desktops so as to launch, monitor, check-point, and resume a parallel and distributed computing job. To achieve high-speed file distribution, AgentTeamwork takes advantage of its agent hierarchy. The system partitions files into stripes at the tree root if they are random-access files, duplicates them at each tree level if they are shared among all remote nodes, fragments them into smaller messages if they are too large to relay to a lower tree level, aggregates such messages in a larger fragment if they are in transit to the same subtree, and returns output files to the user along multi-paths established within the tree. To achieve fault-tolerant file delivery, each agent periodically takes a snapshot of in-transit and on-memory file messages with its user job, and thus resumes them from the latest snapshot when they crash accidentally.This paper presents an implementation and its competitive performance of AgentTeamwork's file-distribution algorithm including file partitioning, transfer, check-pointing, and consistency maintenance.
Factors of Incomplete Adaptation for Color Reproduction Considering Subjective White Point Shift for Varying Illuminant
Authors: Sung-Hak Lee, Myoung-Hwa Lee, Kyu-Ik Sohng
Venue: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (2008)

In this paper, we investigated the effect of chromaticity and luminance of surround to decide subject neutral white, and conducted a mathematical model of adapting degree for environment. Factors for adapting degree consist of two parts, adapting degree of ambient chromaticity and color saturation. These can be applied to color appearance models (CAM), actually improve the performance of color matching of CAM, hence would produce the method of image reproduction to general display systems.
Motion Saliency Maps from Spatiotemporal Filtering
Authors: Anna Belardinelli, Fiora Pirri, Andrea Carbone
Venue: Attention in Cognitive Systems: 5th International Workshop on Attention in Cognitive Systems, WAPCV 2008 Fira, Santorini, Greece, May 12, 2008 Revised Selected Papers (2009)

For artificial systems acting and perceiving in a dynamic world a core ability is to focus on aspects of the environment that can be crucial for the task at hand. Perception in autonomous systems needs to be filtered by a biologically inspired selective ability, therefore attention in dynamic settings is becoming a key research issue.In this paper we present a model for motion salience map computation based on spatiotemporal filtering. We extract a measure of coherent motion energy and select by the center-surround mechanism relevant zones that accumulate most energy and therefore contrast with surroundings in a given time slot.The method was tested on synthetic and real video sequences, supporting biological plausibility.
My Dating Site Thinks I'm a Loser: effects of personal photos and presentation intervals on perceptions of recommender systems
Authors: Shailendra Rao, Tom Hurlbutt, Clifford Nass, Nundu JanakiRam
Venue: Proceedings of the 27th international conference on Human factors in computing systems (2009)

Receiving poor results from a personalized recommendation system is frustrating. When users try to compensate by putting on a "different face" and game the system, the results can be even more frustrating. This paper investigates how to improve the user experience of such systems by: 1) adding personal photos to increase self-awareness, and 2) providing recommendations interspersed with personal questions. A 2x2 web experiment (N=56) within the context of an online dating match recommendation system was used to assess these two effects. Displaying a person's photo stabilized both response strategies and liking of a recommender's poor suggestions. Additionally, presenting all of the results together at the end was less frustrating than spreading them out. These results demonstrate that simple interface design decisions can have profound effects on user behaviors and attitudes with personalized recommendation systems.
Searching and Finding in Large Video Collections
Authors: Marcel Worring
Venue: Proceedings of the 15th International Multimedia Modeling Conference on Advances in Multimedia Modeling (2009)

Marcel Worring received the MSc degree (honors) and PhD degree, both in computer science, from the Vrije Universiteit, Amsterdam, The Netherlands, in 1988 and the University of Amsterdam in 1993, respectively. He is currently an associate professor at the University of Amsterdam. His interests are in multimedia search and systems. He is leading the MediaMill team which has been succesful in the last years in the TRECVID benchmark. Methods are applied to visual search in broadcast archives as well as in the field of Forensic Intelligence. He has published over 100 scientific papers and serves on the program committee of several international conferences. He is the chair of the IAPR TC12 on Multimedia and Visual Information Systems, associate editor of the IEEE Transactions on Multimedia and of Pattern Analysis and Applications journal, general chair of the 2007 ACM International Conference on Image and Video Retrieval in Amsterdam and co-organizer of the first and second VideOlympics.