ppxscal/embedding_network huggingface dataset:
Routing Speedup in Multicore-Based Ad Hoc Networks
Authors: Ami Marowka
Venue: Proceedings of the Sixth International Symposium on Parallel and Distributed Computing (2007)

The integration of multicore processors into wireless mobile devices is creating new opportunities to enhance the speed and scalability of message routing in ad hoc networks. In this paper we study the impact of multicore technology on routing speed and node efficiency, and draw conclusions regarding the measures that should be taken to conserve energy and prolong the lifetime of a network. We formally define three metrics and use them for performance evaluation: Time-to-Destination (T2D), Average Routing Speedup (ARS), and Average-Node-Efficiency (ANE). The T2D metric is the time a message takes to travel to its destination in a loaded traffic network. ARS measures the average routing speed gained by a multicore-based network over a single-core based network, and ANE measures the average efficiency of a node, or the number of active cores. These benchmarks show that routing speedup in networks with multicore nodes increases linearly with the number of cores and significantly decrease traffic bottlenecks, while allowing more routings to be executed simultaneously. The average node efficiency, however, decreases linearly with the number of cores per node. Power-aware protocols and energy management techniques should therefore be developed to turn off the unused cores.
Evaluation of object tracking for aircraft activity surveillance
Authors: D. Thirde, M. Borg, J. Aguilera, J. Ferryman
Venue: Proceedings of the 14th International Conference on Computer Communications and Networks (2005)

This paper presents the evaluation of an object tracking system that has been developed in the context of aircraft activity monitoring. The overall tracking system comprises three main modules - motion detection, object tracking and data fusion. In this paper we primarily focus on performance evaluation of the object tracking module, with emphasis given to the general 2D tracking performance and the 3D object localisation.
Academic help seeking in online gwa-weh in korea
Authors: Michael J. Streibel
Venue:  (2006)

This qualitative ethnographic study explored students' academic help seeking through a web board in a Question and Answer (Q A) service in an educational web site for primary and secondary school students, which might be called online Gwa-Weh in South Korea. Taking the social constructive approach as a theoretical framework, which focuses on the multiple perspectives inherent in the development and usage of technology, this study explored online academic help seeking based on the experience and perspectives of stakeholders. Specifically, this study described, analyzed, and interpreted patterns of online academic help seeking, its norms and rules, and the values and capacities of the technology. The ethnographic data was collected through interviews with stakeholders including middle school students who used the Q A service actively, their parents, their schoolteachers, the online teachers who provided answers in the Q A service, the company staff, and the company branches, observation of the educational web site where the online academic help seeking took place, and electronic messages on the Q A web boards. Regarding academic help seeking patterns, this study found the students' and the online teachers' behavior patterns in using the Q A service and discussed the issue of students' dependency problem in the online Q A service. In addition, students' proactive academic help seeking behavior pattern was discussed in terms of students' different interpretations of academic help seeking between online and at school. With regard to the norms and rules for online academic help seeking, this study found that some norms and rules were agreed upon by the stakeholders, whereas other norms and rules have not yet been agreed upon, and discussed how the disagreed upon norms and rules implied the stakeholders' different interpretations of online academic help seeking. Regarding the values and capacities of the technology for academic help seeking, this study found specific, various and down-to-earth advantages and disadvantages of the current web board used in the educational web site based on the experience of the students and of the online teachers.
Localization and Mapping for Autonomous Navigation in Outdoor Terrains: A Stereo Vision Approach
Authors: Motilal Agrawal, Kurt Konolige, Robert C. Bolles
Venue: Proceedings of the Eighth IEEE Workshop on Applications of Computer Vision (2007)

We consider the problem of autonomous navigation in unstructured outdoor terrains using vision sensors. The goal is for a robot to come into a new environment, map it and move to a given goal at modest speeds (1 m/sec). The biggest challenges are in building good maps and keeping the robot well localized as it advances towards the goal. In this paper, we concentrate on showing how it is possible to build a consistent, globally correct map in real time, using efficient precise stereo algorithms for map making and visual odometry for localization. While we have made advances in both localization and mapping using stereo vision, it is the integration of the techniques that is the biggest contribution of the research. The validity of our approach is tested in blind experiments, where we submit our code to an independent testing group that runs and validates it on an outdoor robot.
IPv6 in European Internet eXchange Points
Authors: Monica Domingues, Carlos Friacas
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

Internet eXchange Points (IXs) are an important piece of the puzzle for the entire Internet economy: they narrow distances in the Internet and allow optimized connections between different ISPs (Internet Service Providers). Routing traffic the long way round is not an efficient approach to use the network (IX mantra: keep local traffic local). Due to the importance of this type of infrastructure to the global Internet is essential to look at the IPv6 deployment in it. This paper intends to provide insight into the actual status of IPv6 in European IXs.
Bro: a system for detecting network intruders in real-time
Authors: Vern Paxson
Venue: Proceedings of the 7th conference on USENIX Security Symposium - Volume 7 (1998)

We describe Bro, a stand-alone system for detecting network intruders in real-time by passively monitoring a network link over which the intruder's traffic transits. We give an overview of the system's design, which emphasizes high-speed (FDDI-rate) monitoring, real-time notification, clear separation between mechanism and policy, and extensibility. To achieve these ends, Bro is divided into an "event engine" that reduces a kernel-filtered network traffic stream into a series of higher-level events, and a "policy script interpreter" that interprets event handlers written in a specialized language used to express a site's security policy. Event handlers can update state information, synthesize new events, record information to disk, and generate real-time notifications via syslog. We also discuss a number of attacks that attempt to subvert passive monitoring systems and defenses against these, and give particulars of how Bro analyzes the four applications integrated into it so far: Finger, FTP, Portmapper and Telnet. The system is publicly available in source code form.
SNP: an interface for secure network programming
Authors: Thomas Y. C. Woo, Raghuram Bindignavle, Shaowen Su, Simon S. Lam
Venue: Proceedings of the USENIX Summer 1994 Technical Conference on USENIX Summer 1994 Technical Conference - Volume 1 (1994)

SNP provides a high-level abstraction for secure end-to-end network communications. It supports both stream and datagram semantics with security guarantees (e.g., data origin authenticity, data integrity and data confidentiality). It is designed to resemble the Berkeley sockets interface so that security can be easily retrofitted into existing socket programs with only minor modifications. SNP is built on top of GSS-API, thus making it relatively portable across different authentication mechanisms conforming to GSS-API. SNP hides the details of GSS-API (e.g., credentials and contexts management), the communication sublayer as well as the cryptographic sublayer from the application programmers. It also encapsulates security sensitive information, thus preventing accidental or intentional disclosure by an application program.
Refining tree-based state clustering by means of formal concept analysis, balanced decision trees and automatically generated model-sets
Authors: D. Willett
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 02 (1999)

Decision tree-based state clustering has emerged in as the most popular approach for clustering the states of context dependent hidden Markov model based speech recognizers. The application of sets of phones, mainly phonetically motivated, that limit the possible clusters, results in a reasonably good modeling of unseen phones while it still enables to model specific phones very precisely whenever this is necessary and enough training data is available. Formal concept analysis, a young mathematical discipline, provides means for the treatment of sets and sets of sets that are well suited for further improving tree-based state clustering. The possible refinements are outlined and evaluated in this paper. The major merit is the proposal of procedures for the adaptation of the number of sets used for clustering to the amount of available training data, and of a method that generates suitable sets automatically without the incorporation of additional knowledge.
An Efficient Digital Watermarking Scheme for Dynamic Estimation of Wireless Channel Condition
Authors: Santi P. Maity, Malay K. Kundu, Seba Maity
Venue: Proceedings of the International Conference on Computing: Theory and Applications (2007)

This paper investigates the scope of an unconventional use of digital watermarking principle to blindly assess the quality of the multimedia signals through dynamic estimation of the status of the wireless channel. An algorithm of a fragile watermarking technique is proposed for digital image that can be extended to video signal applications by embedding watermark information in different frames. Fast Walsh transform becomes an effective choice to implement-proposed fragile spread spectrum (SS) image watermarking scheme as it offers low processing noise at low quality compression, low loss of image information due to embedding, and low computation cost. Circuits for watermark embedding and decoding are developed that makes it suitable for such real time application. Performance of the algorithm is tested for QoS assessment of digital images when transmitted through mobile channel and also to mitigate the multipath propagation effect in Rayleigh and Rician fading environment.
Quorum: flexible quality of service for internet services
Authors: Josep M. Blanquer, Antoni Batchelli, Klaus Schauser, Rich Wolski
Venue: Proceedings of the 2nd conference on Symposium on Networked Systems Design & Implementation - Volume 2 (2005)

In this paper we describe Quorum, a non-invasive approach to scalable quality-of-service provisioning that uses traffic shaping, admission control, and response monitoring at the border of an Internet site to ensure throughput and response time guarantees. We experimentally compare an implementation of Quorum both to hardware over-provisioning and to leading software approaches using real world workloads. Our results show that Quorum can enforce the same QoS guarantees as either of the compared approaches, while achieving better resource utilization than over-provisioning and without the application rewriting overhead required by intrusive software approaches. We also demonstrate that our implementation can successfully handle extreme situations such as sudden traffic surges, application misbehavior and node failures. Furthermore, we demonstrate the flexibility of Quorum by providing QoS guarantees for a complex and heterogeneous Internet service that cannot be implemented by other current software approaches.
An algebraic approach for $${\mathcal{H}}$$-matrix preconditioners
Authors: S. Oliveira, F. Yang
Venue: Computing (2007)

Hierarchical matrices ($${\mathcal{H}}$$-matrices) approximate matrices in a data-sparse way, and the approximate arithmetic for $${\mathcal{H}}$$-matrices is almost optimal. In this paper we present an algebraic approach for constructing $${\mathcal{H}}$$-matrices which combines multilevel clustering methods with $${\mathcal{H}}$$-matrix arithmetic to compute the $${\mathcal{H}}$$-inverse, $${\mathcal{H}}$$-LU, and the $${\mathcal{H}}$$ -Cholesky factors of a matrix. Then the $${\mathcal{H}}$$-inverse, $${\mathcal{H}}$$-LU or $${\mathcal{H}}$$-Cholesky factors can be used as preconditioners in iterative methods to solve systems of linear equations. The numerical results show that this method is efficient and greatly speeds up convergence compared to other approaches, such as JOR or AMG, for solving some large, sparse linear systems, and is comparable to other $${\mathcal{H}}$$-matrix constructions based on Nested Dissection.
A traffic-based adaptive deficit scheduling for QoS support in IEEE 802.16e TDD mode
Authors: Nararat RUANGCHAIJATUPON, Yusheng JI
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

We propose a scheduling scheme for IEEE 802.16e Broadband Wireless Access (BWA) systems working in TDD mode. The scheduler exploits deficit priority queue scheduling with adaptive deficit calculation to support variable rate realtime traffic in both uplink and downlink directions. Our scheduling scheme makes use of a Minimum Tolerable Traffic Rate, a QoS parameter defined by the standard. The simulation results show that the proposed scheduler can properly serve realtime flows and achieve low delay even in a very high traffic load condition.
Digital Donne: workflow, editing tools, and the reader.s interface of a collection of 17th-century english poetry
Authors: Carlos Monroy, Richard Furuta, Gary Stringer
Venue: Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries (2007)

We describe a multidisciplinary effort in the creation of an electronic repository of poems of John Donne - the renowned 17th-century English poet. We discuss the workflow we have adopted and the Web-based tools we have developed for maintaining a collection of transcriptions and images, a concordance of poems, a list of press variants, and a browsing interface that enables readers to access these materials. A complement to the multi-volume Variorum Edition of the Poetry of John Donne, this endeavor shows how a traditional scholarly edition can be enhanced by resources made available by computers and the Internet.
Cooperative learning in computer architecture: an educational project and its network support
Authors: Y. A. Dimitriadis
Venue: Proceedings of the Frontiers in Education Conference, 2001. on 31st Annual - Volume 01 (2001)

This paper describes the design, setup and evaluation of an educational project in computer architecture studies. Its design through the educational-telematic framework DELFOS, proposed by the authors' research group, aims to employ computer supported collaborative learning in computer engineering studies. Its main objective is to integrate lectures, simple assignments and laboratory work through projects and case studies in computer architecture design and evaluation. Experimental studies were carried out during two academic years with very encouraging results. At least three student groups in each session dealt with one out of 5 distinct case studies. Students assumed the roles of consulting firm and computer manufacturer, who try to give an answer to a specific customer/market sector. Cooperative learning was carried out through synchronous guided discussions within the class in key dates, asynchronous document sharing and discussions, as well as collaborative edition of the final project report. Analysis of the experimental work was performed on both ethnographic data and computer transcriptions, while current studies deal with student interactions with social network analysis methods.
An Adaptive Submesh Allocation Strategy for Two-Dimensional Mesh Connected Systems
Authors: Jianxun Ding, Laxmi N. Bhuyan
Venue: Proceedings of the 1993 International Conference on Parallel Processing - Volume 02 (1993)

In this paper, we propose an adaptive scan (AS) strategy for submesh allocation. The earlier frame sliding (FS) strategy allocates submeshes based on fixed orientations of incoming faska. It also slides fiunaes om mesh planes by fdzed strides. Our AS a1Iocation strategy differs from the FS strategy in the following two ways: (1) it does not fiz the orientations of incoming tasks; (2) it scans on mesh planes adapfively. Experimental studies show that our AS strategy outperforms the FS strategy in terms of external fragmentation, completion time, and processor uitilizaiion.
Hard real-time with RTX on windows NT
Authors: Mike Cherepov, Chris Jones
Venue: Proceedings of the 3rd conference on USENIX Windows NT Symposium - Volume 3 (1999)

For a variety of reasons, Microsoft Windows NT is increasingly being considered as a platform for deployment of real-time systems. In order to meet the stringent latency requirements of hard real-time systems, it is necessary to augment the capabilities of Windows NT. We examine VenturCom's RTX, which provides a real-time subsystem running on Windows NT. It implements deterministic scheduling of real-time threads, inter-process communication mechanisms between the real-time environment and the native NT environment, and other extensions to Windows NT which are often found in specialized real-time operating systems. We discuss how the components of RTX provide these features, explore current results and experiences, and point out possible future directions for enhancement.
Assessing student learning in a distance education environment
Authors: M. M. Morcos
Venue: Proceedings of the 30th Annual Frontiers in Education - Volume 02 (2000)

Assessment has become a subject of great interest to engineering educators. This is part of a larger trend toward emphasizing student learning outcomes in higher education, undertaken both to demonstrate accountability and to improve instruction. Traditionally, engineering educators have focused assessment around students' mastery of content knowledge and skills. The processes of the Master of Science in Electrical Engineering (MSEE) program offered by Kansas State University will be assessed in a variety of ways. These include input from students, employers, and faculty.
Semantic extraction and adaptive delivery of multimedia contents for the cultural assets
Authors: Mario Cannataro, Lorenzo Gallucci, Adriana Pietramala, Pasquale Rullo, Pierangelo Veltri
Venue: Proceedings of the second workshop on Use of P2P, GRID and agents for the development of content networks (2007)

The paper addresses two relevant topics in Content Networks related to the extraction and delivery of multimedia contents: the management of complex and rich multimedia contents, and the heterogeneity of access networks, user's profiles, and browsing interfaces. The former can be faced by using ontology-based modeling techniques, while the latter can exploit adaptive systems. The paper presents a software system that combines ontology-based contents modeling and extraction with adaptive, network-aware, content delivery. Contents are extracted from a knowledge base through reasoning modules and are adapted to the user through an adaptive system that takes into account network and terminal characteristics as well as user profile. To optimize the user profiling activity the proposed system uses a P2P profile sharing and updating mechanism. System architecture and a case study in the cultural assets domain are presented.
Bridging the technology generation gap: upgrading a network management application to a new technology base
Authors: Jay S. Lark, Pierre Osborne
Venue: Proceedings of the USENIX Applications Development Symposium Proceedings on USENIX Applications Development Symposium Proceedings (1994)

NMCS is a network management system which has been developed to manage dedicated fractional-T1 networks, allowing end-users such as banks and government agencies the ability to dynamically manage the allocation of their dedicated communication facilities. The first version of NMCS was delivered on a PC platform; it was a successful and well-accepted product. A new version of the system was designed to address some of the shortcomings of the first version. NMCS II is a significant upgrade to the first NMCS product. In addition to extending its functional capabilities, NMCS II is built on a different technology base from its predecessor: the hardware and operating system, application architecture, user interface, and database have all been upgraded to a new technology generation. NMCS II is now installed and operational at several customer sites throughout Canada. While the product has passed its formal acceptance, a number of acceptability issues were present in its initial release. Many of these issues derive from the changes to the technology base, which we call the "technology generation gap." We look at several of these acceptability issues which we encountered, how these issues relate to the technology generation gap, and how we are addressing these issues going forward. We conclude with a discussion of lessons we have learned to help avoid falling into the "gap" in the future.
Eigenfilter design of real and complex coefficient prototypes for uniform and nonuniform filter banks
Authors: F. Argenti
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 03 (1999)

In this study we propose a new method to design pseudo-QMF prototype filters to implement near perfect reconstruction (NPR) cosine-modulated filter banks. The method is based on the eigenfilter approach, that is simple to implement, but, nevertheless, is very efficient in designing high attenuation prototype filters. The method also allows to design complex coefficient prototypes that can be used to build nonuniform filter banks. The effectiveness of the method is demonstrated by means of some examples of design of both uniform and nonuniform filter banks.
Model-Driven Development of FlexRay-Based Systems with the Timing Definition Language (TDL)
Authors: Andreas Naderlinger, Johannes Pletzer, Wolfgang Pree, Josef Templ
Venue: Proceedings of the 4th International Workshop on Software Engineering for Automotive Systems (2007)

This paper argues that a logical specification of the timing behavior, which represents the core abstraction of the Timing Definition Language (TDL), is the key to significantly reduce the development, maintenance and integration costs of FlexRay-based systems. We measured a productivity gain by a factor of 20 and more with TDL compared to state-of-the-art FlexRay development methods and tools (see Section 1). We illustrate how TDL allows the platform-independent modeling of the timing and functional behavior, and how we accomplish the automatic platform mapping. An outlook sketches future research activities.