ppxscal/embedding_network huggingface dataset:
Double-Indexing Mechanism of Search Engine Based on Campus Net
Authors: Changsheng Zhou, Wei Ding, Na Yang, Zhiqiang Ma
Venue: Proceedings of the 2006 IEEE Asia-Pacific Conference on Services Computing (2006)

This paper discusses the double-indexing mechanism of search engine based on campus net. At first of the paper, we introduce the search engine and it's types. Then, we refer to the search engine of campus net that is not general full-text search engine and the necessary of designing CNSE. Furthermore, the structure of the index is described. In addition, we discuss the word-filtering mechanism, performance optimization of index and implement scheme of CNSE system. And we conclude by combining the search engine with Web Service.
Two-step 3-dimensional sketching tool for new product development
Authors: Ali Akgunduz, Hang Yu
Venue: Proceedings of the 36th conference on Winter simulation (2004)

This paper discusses a two-step virtual reality based conceptual design tool that enables industrial designers to create sketches of their ideas in 3-dimensional space in real time. In the developed sketching tool, the rough shapes of products are generated by tracing the trajectory of the data-gloves worn by the designer. In the model a practical solution is provided to reduce the generation of unnecessary control points. This is achieved by representing each control point by a spherical volume. Once the rough sketching is completed, NURBS surfaces are constructed by the limited number of reference points that are selected from the initial sketch by using a virtual pen. The two-steps sketching technique enables designers to perform their artistic characteristics freely in an intuitive environment and also enables designers to generate parametric representations of the surfaces to be used in CAD/CAM systems for further analysis.
Finite element approximation of convection diffusion problems using graded meshes
Authors: Ricardo G. Durán, Ariel L. Lombardi
Venue: Applied Numerical Mathematics (2006)

We consider the numerical approximation of a model convection-diffusion equation by standard bilinear finite elements. Using appropriately graded meshes we prove optimal order error estimates in the ε-weighted H1-norm valid uniformly, up to a logarithmic factor, in the singular perturbation parameter. Finally, we present some numerical examples showing the good behavior of our method.
Spatial problems of nonlinear dynamics: motivation and analysis
Authors: I. V. Miroshnik, E. Olkhovskaya
Venue: Proceedings of the 2003 International Conference on Physics and Control - Volume 2 (2003)

The paper represents a comparative study of the main problems of spatial motion of nonlinear systems and properties of invariance and attractivity of smooth multidimensional sets. Their connection with concepts of synergetics, coordinated control and synchronization is demonstrated. Problems of energy stabilization and synchronization of coupled pendulums, as well as local behaviour of Lorenz system, are considered as special cases and prove an analogy of the concepts.
Use of intelligent controller nodes to augment human role-players in synthetic battlespace exercises
Authors: Gary E. Buker, Brian C. Flis
Venue: Proceedings of the 36th conference on Winter simulation (2004)

Distributed exercises, which combine live, virtual, and constructive entities, are increasingly used for training, readiness exercises, and CONOPS Analysis. These exercises require the support of human controllers who monitor and control simulated entities to maintain realism of the exercise. The high cost in time, money, and personnel for supporting large exercises makes it important to reduce the number of role players required. In addition, the large volume of information flowing from the synthetic battlespace and the narrow window for response dictate a need for mechanisms to assist the human role players who control the simulated entities. The Role Player Intelligent Controller Node (RPICN) uses intelligent agents to monitor and interact with the simulation environment. The agents can recognize significant events, make recommendations, and perform routine actions for the role player. By increasing situational awareness and automating routine tasks, the RPICN improves the efficiency of the human controllers.
Rule-Based Platform for Web User Profiling
Authors: Jianping Zhang, Manu Shukla
Venue: Proceedings of the Sixth International Conference on Data Mining (2006)

This paper discusses a research project: rule-based Web user profiling platform. In this platform, usage data are encoded as a sequence of events, each of which represents an action performed by a user on a Web service at a given time. An event template is proposed to define event models for different Web services. The platform is rule-based. Rules define profile metrics and determine how to compute profile metrics from usage events. A prototype of the platform was implemented and was applied to generate profiles from page view events. The major contribution of the work is the rule-based approach to user profiling. It is the rules and the event template that provide the flexibility to allow the platform to be configured for different Web services.
The philosophy of presence: from epistemic failure to successful observation
Authors: Luciano Floridi
Venue: Presence: Teleoperators and Virtual Environments (2005)

The paper introduces a new model of telepresence. First, it criticizes the standard model of presence as epistemic failure, showing it to be inadequate, It then replaces it with a new model of presence as successful observation. It further provides reasons to distinguish between two types of presence, backward and forward. The new model is then tested against two ethical issues whose nature has been modified by the development of digital information and communication technologies, namely pornography and privacy, and shown to be effective.
A Monitoring-Aware Network-on-Chip Design Flow
Authors: Calin Ciordas, Andreas Hansson, Kees Goossens, Twan Basten
Venue: Proceedings of the 9th EUROMICRO Conference on Digital System Design (2006)

Networks-on-chip (NoC) are a scalable interconnect solution for systems on chip and are rapidly becoming reality. Monitoring is a key enabler for debugging or performance analysis and quality-of-service techniques. The NoC design problem and the NoC monitoring problem cannot be treated in isolation. We propose a monitoring-aware NoC design flow able to take into account the monitoring requirements in general. We illustrate our flow with a debug driven monitoring case study of transaction monitoring. By treating the NoC design and monitoring problems in synergy, the area cost of monitoring can be limited to 3-20% in general.
Towards Requirement and Modeling Driven Security Evaluation
Authors: Reijo Savola
Venue: Proceedings of the International Conference on Systems and Networks Communication (2006)

Development of the information security requirements of practical telecommunications and software-intensive systems is typically at an inadequate level and relies heavily on the experience of the security professionals. Security requirements are in the focus in all phases of security engineering. Obviously, automated approaches are needed in this field. We here introduce a framework for security evaluation based on security requirement definition, behavior modeling and evidence collection.
DB2 goes hybrid: integratng native XML and XQuery with relational data and SQL
Authors: K. Beyer, R. Cochrane, M. Hvizdos, V. Josifovski, J. Kleewein, G. Lapis, G. Lohman, R. Lyle, M. Nicola, F. Özcan, H. Pirahesh, N. Seemann, A. Singh, T. Truong, R. C. Van der Linden, B. Vickery, C. Zhang, G. Zhang
Venue: IBM Systems Journal (2006)

Comprehensive and efficient support for XML data management is a rapidly increasing requirement for database systems. To address this requirement, DB2 Universal DatabaseTM (UDB) now combines relational data management with native XML support. This makes DB2® a truly hybrid database management system with first-class support for both XML and relational data processing as well as the integration of the two. This paper presents the overall architecture and design aspects of native XML support in DB2 UDB and its integration with the relational data-flow engine. We describe the new XML components in DB2 UDB and show how XML processing leverages much of the infrastructure which is used for relational data.
Enhancing agent-oriented models with aspects
Authors: Alessandro Garcia, Christina Chavez, Ricardo Choren
Venue: Proceedings of the fifth international joint conference on Autonomous agents and multiagent systems (2006)

The modular representation of concerns is imperative in the design modeling of multi-agent systems (MASs). However, MAS designers typically face a number of concerns that inherently affect several system agents and their respective internal elements, such as actions and goals. These crosscutting concerns encompass both internal and systemic properties, such as learning, mobility, error handling, and security. Without an explicit modeling of such MAS properties, designers can not properly communicate and reason about them and their broadly-scoped effects. The result is a multitude of agent-oriented design breakdowns: poor traceability from requirements to design models, hindering of reuse opportunities, and decreased evolvability. This paper presents an enhancement of an existing agent-oriented modeling language with aspects. We illustrate the use of our approach through some classical examples of crosscutting concerns in agent-oriented design models.
Teaching OOP with BlueJ: A Case Study
Authors: Stelios Xinogalos, Maya Sartatzemi, Vassilios Dagdilelis, Georgios Evangelidis
Venue: Proceedings of the Sixth IEEE International Conference on Advanced Learning Technologies (2006)

In this paper we present our findings on teaching OOP with BlueJ in the context of a one-semester programming course. We organize our findings, i.e., the difficulties, the errors, and the misconceptions that students encounter, in two categories: (a) difficulties attributed to the special characteristics of ......, and, (b) difficulties that may be attributed to the features of the programming environment.
Shape Registration in Implicit Spaces Using Information Theory and Free Form Deformations
Authors: Xiaolei Huang, Nikos Paragios, Dimitris N. Metaxas
Venue: IEEE Transactions on Pattern Analysis and Machine Intelligence (2006)

We present a novel, variational and statistical approach for shape registration. Shapes of interest are implicitly embedded in a higher-dimensional space of distance transforms. In this implicit embedding space, registration is formulated in a hierarchical manner: the Mutual Information criterion supports various transformation models and is optimized to perform global registration; then, a B-spline-based Incremental Free Form Deformations (IFFD) model is used to minimize a Sum-of-Squared-Differences (SSD) measure and further recover a dense local nonrigid registration field. The key advantage of such framework is twofold: 1) it naturally deals with shapes of arbitrary dimension (2D, 3D, or higher) and arbitrary topology (multiple parts, closed/open) and 2) it preserves shape topology during local deformation and produces local registration fields that are smooth, continuous, and establish one-to-one correspondences. Its invariance to initial conditions is evaluated through empirical validation, and various hard 2D/3D geometric shape registration examples are used to show its robustness to noise, severe occlusion, and missing parts. We demonstrate the power of the proposed framework using two applications: one for statistical modeling of anatomical structures, another for 3D face scan registration and expression tracking. We also compare the performance of our algorithm with that of several other well-known shape registration algorithms.
The Effects of Divided Attention on Encoding- and Retrieval-Related Brain Activity: A PET Study of Younger and Older Adults
Authors: Nicole D. Anderson, Tetsuya Iidaka, Roberto Cabeza, Shitij Kapur, Anthony R. McIntosh, Fergus I. M. Craik
Venue: Journal of Cognitive Neuroscience (2000)

Divided attention (DA) disrupts episodic encoding, but has little effect on episodic retrieval. Furthermore, normal aging is associated with episodic memory impairments, and when young adults are made to encode information under DA conditions, their memory performance is reduced and resembles that of old adults working under full attention (FA) conditions. Together, these results suggest a common neurocognitive mechanism by which aging and DA during encoding disrupt memory performance. In the current study, we used PET to investigate younger and older adults' brain activity during encoding and retrieval under FA and DA conditions. In FA conditions, the old adults showed reduced activity in prefrontal regions that younger adults activated preferentially during encoding or retrieval, as well as increased activity in prefrontal regions young adults did not activate. These results indicate that prefrontal functional specificity of episodic memory is reduced by aging. During encoding, DA reduced memory performance, and reduced brain activity in left-prefrontal and medial-temporal lobe regions for both age groups, indicating that DA during encoding interferes with encoding processes that lead to better memory performance. During retrieval, memory performance and retrieval-related brain activity were relatively immune to DA for both age groups, suggesting that DA during retrieval does not interfere with the brain systems necessary for successful retrieval. Finally, left inferior prefrontal activity was reduced similarly by aging and by DA during encoding, suggesting that the behavioral correspondence between these effects is the result of a reduced ability to engage in elaborate encoding operations.
Off-Line Testing of Delay Faults in NoC Interconnects
Authors: Tomas Bengtsson, Artur Jutman, Shashi Kumar, Raimund Ubar, Zebo Peng
Venue: Proceedings of the 9th EUROMICRO Conference on Digital System Design (2006)

Testing of high density SoCs operating at high clock speeds is an important but difficult problem. Many faults, like delay faults, in such sub-micron chips may only appear when the chip works at normal operating speed. In this paper, we propose a methodology for atspeed testing of delay faults in links connecting two distinct clock domains in a SoC. We give an analytical analysis about the efficiency of this method. We also propose a simple digital hardware structure for the receiver end of the link under test to detect delay faults. It is possible to extend our method to combine it with functional testing of the link and adapt it for online testing.
Simulation of coherent risk measures
Authors: Vadim Lesnevski, Barry L. Nelson, Jeremy Staum
Venue: Proceedings of the 36th conference on Winter simulation (2004)

In financial risk management, a coherent risk measure equals the maximum expected loss under several different probability measures, which are analogous to systems in ranking and selection. Here it is the best system's expected value and not identity that is of interest. We explore the correctness and computational efficiency of simulated confidence intervals for a maximum of several expectations.
End-to-end concurrent multipath transfer using transport layer multihoming
Authors: Paul D. Amer
Venue:  (2006)

Transport layer multihoming binds a single transport layer association to multiple network addresses at each endpoint, thus allowing the two end hosts to communicate over multiple network paths. This dissertation investigates end-to-end Concurrent Multipath Transfer (CMT) using transport layer multihoming for increased application throughput. CMT is the simultaneous transfer of new data from a source host to a destination host via two or more end-to-end paths. We investigate and evaluate design considerations in implementing CMT at the transport layer using the Stream Control Transmission Protocol (SCTP) as an example of a multihome-capable transport layer protocol. Specifically, we explore (i) algorithms for CMT at the transport layer, (ii) retransmission policies for CMT, and (iii) performance implications of a bounded receive buffer on CMT. We identify three negative side-effects of reordering due to CMT that must be managed before the full performance gains of CMT's parallel transfer can be achieved. We propose three algorithms to eliminate these side-effects: the Split Fast Retransmit algorithm (SFR) to handle unnecessary fast retransmissions by a sender, the Cwnd Update for CMT algorithm (CUC) to counter overly conservative congestion window growth at a sender, and the Delayed Ack for CMT algorithm (DAC) to curb an increase in ack traffic due to fewer delayed acks by a receiver. These algorithms demonstrate that a single sequence space within a transport layer association is sufficient for CMT; separate sequence spaces per path are not required.We propose and evaluate five retransmission policies for CMT. Introducing these retransmission policies causes two side-effects: occurrence of spurious retransmissions and inaccurate congestion window estimation. We propose two protocol modifications to eliminate these side-effects. Using simulation, we evaluate CMT against AppStripe, a simulated idealized application that stripes data over multiple paths using multiple SCTP associations. The results of this evaluation demonstrate that CMT's sharing of sequence space across paths improves performance---an inherent benefit that load sharing at the transport layer has over that at the application layer. We study the performance of CMT in the presence of a bounded receive buffer (rbuf). Simulation results show that if two paths are used for CMT, the lower quality (i.e., higher loss rate) path degrades overall throughput of an rbuf-constrained CMT association by blocking the rbuf. (Abstract shortened by UMI.)
Exploiting Metadata Links to Support Information Retrieval in Document Management Systems
Authors: Mirjana Andric, Wendy Hall
Venue: Proceedings of the 10th IEEE on International Enterprise Distributed Object Computing Conference Workshops (2006)

The à la" (Associative Linking of Attributes) project demonstrates how a system for managing document collections in an organisational setting could be enhanced to support the information delivery process. Contemporary approaches to managing collections of documents typically lack support for flexible metadata definition, browsing and ultimately use for document retrieval. Users are forced to resort to keyword searching without knowing which keywords exist in the domain and which were used by other searchers. This work demonstrates how the usage of metadata linked into the ontological structure for tasks of supporting information retrieval, offers an advantage over the traditional full text searching techniques. The "à la" system introduces a novel approach to metadata linking by using ontological zzstructures and ZigZag linking. It makes use of a metadata network for document retrieval, introducing a "Query by association" approach. Also, browsing metadata connected in a ZigZag fashion could benefit the knowledge engineers in their first step towards building a formal organisational ontology. It is concluded that the "à la" method has the potential to be applicable towards establishing principles of the Semantic Web within a corporate environment.
Enhanced block motion estimation based on distortion-directional search patterns
Authors: Byung-Gyu Kim, Suk-Kyu Song, Pyoung-Soo Mah
Venue: Pattern Recognition Letters (2006)

An improved algorithm for integer pel motion estimation based on the block matching algorithm (BMA) is presented for use in a block-based video coding system. To achieve enhanced motion estimation performance, we propose an adaptive search pattern length for each iteration of the current macro block (MB). In addition, search patterns that must be checked are determined using directional information based on the assumption of a unimodal distortion surface, thus reducing intermediate searches. This concept can be generalized to other search pattern algorithms, such as the diamond search (DS) and the three-step search (TSS). The proposed algorithm is tested with several sequences and excellent performance is verified.
Heart Motion Evaluation Indexes Using Ultrasonic RF Signal
Authors: Yosuke MIZUTANI, Shinji TSURUOKA, Hiroharu KAWANAKA, Tsuyoshi Shinogi, Wataru OHYAMA, Kiyotsugu SEKIOKA
Venue: Proceedings of the 2006 International Conference on Hybrid Information Technology - Volume 02 (2006)

Our research group has developed the tracking method of regional myocardium from ultrasonic radio frequency (RF) signal. The tracking method employs a hierarchical correlation method. In addition, we regarded the correlation coefficient as the confidence coefficient. If it is not high, the tracking position is corrected by neighbor points. The tracking method can detect the movement of myocardium very well if the RF signal is clear. In this research, we investigate the moving distance based on the tracking position that includes less error. As a result, the contributions of the distance are different between normal example and disorder example. We propose three indexes defined by the amounts of statistics for the evaluation of a heart motion.
Analysis of FM signals affected by Gaussian AM using the reduced Wigner-Ville trispectrum
Authors: B. Boashash, B. Ristich
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1993. ICASSP-93 Vol 4., 1993 IEEE International Conference on - Volume 04 (1993)

A novel time-frequency analysis method for FM signals affected by multiplicative and additive noise is proposed. The method, referred to as the reduced Wigner-Ville trispectrum (RWVT), is a member of a class of time-varying polyspectra based on polynomial Wigner-Ville distributions (WVD) (B. Boashash and P. O'Shea, 1991). It is shown that the RWVT outperforms the Wigner-Ville distribution, and therefore any other method based on the Cohen's class of bilinear time frequency distributions (TFDs), for the class of signals considered. In addition, the authors present the statistical properties of an instantaneous frequency estimator based on the peak of the RWVT, and compare them with the properties of the estimator based on the peak of the WVD.
The generalized quadratic knapsack problem. A neuronal network approach
Authors: Pedro M. Talaván, Javier Yáñez
Venue: Neural Networks (2006)

The solution of an optimization problem through the continuous Hopfield network (CHN) is based on some energy or Lyapunov function, which decreases as the system evolves until a local minimum value is attained. A new energy function is proposed in this paper so that any 0-1 linear constrains programming with quadratic objective function can be solved. This problem, denoted as the generalized quadratic knapsack problem (GQKP), includes as particular cases well-known problems such as the traveling salesman problem (TSP) and the quadratic assignment problem (QAP). This new energy function generalizes those proposed by other authors. Through this energy function, any GQKP can be solved with an appropriate parameter setting procedure, which is detailed in this paper. As a particular case, and in order to test this generalized energy function, some computational experiments solving the traveling salesman problem are also included.