ppxscal/embedding_network huggingface dataset:
Discovering frequent sets from data streams with CPU constraint
Authors: Xuan Hong Dang, Wee-Keong Ng, Kok-Leong Ong, Vincent C S Lee
Venue: Proceedings of the sixth Australasian conference on Data mining and analytics - Volume 70 (2007)

Data streams are usually generated in an online fashion characterized by huge volume, rapid unpredictable rates, and fast changing data characteristics. It has been hence recognized that mining over streaming data requires the problem of limited computational resources to be adequately addressed. Since the arrival rate of data streams can significantly increase and exceed the CPU capacity, the machinery must adapt to this change to guarantee the timeliness of the results. We present an online algorithm to approximate a set of frequent patterns from a sliding window over the underlying data stream -- given apriori CPU capacity. The algorithm automatically detects overload situations and can adaptively shed unprocessed data to guarantee the timely results. We theoretically prove, using probabilistic and deterministic techniques, that the error on the output results is bounded within a pre-specified threshold. The empirical results on various datasets also confirmed the feasiblity of our proposal.
Some descent three-term conjugate gradient methods and their global convergence
Authors: Li Zhang, Weijun Zhou, Donghui Li
Venue: Optimization Methods Software (2007)

In this paper, we propose a three-term conjugate gradient method which can produce sufficient descent condition, that is, [image omitted] . This property is independent of any line search used. When an exact line search is used, this method reduces to the standard Hestenes-Stiefel conjugate gradient method. We also introduce two variants of the proposed method which still preserve the sufficient descent property, and prove that these two methods converge globally with standard Wolfe line search even if the minimization function is nonconvex. We also report some numerical experiment to show the efficiency of the proposed methods.
Proceedings of the 2008 international workshop on Privacy and anonymity in information society
Authors: Farshad Fotouhi, Li Xiong, Traian Marius Truta
Venue: ACM International Conference Proceeding Series; Vol. 331 (2008)

It is our great pleasure to welcome you to the First International Workshop on Privacy and Anonymity in the Information Society (PAIS 2008), collocated with 11th International Conference on Extending Database Technology (EDBT 2008). While the ever increasing computational power together with the huge amount of individual data collected daily by various agencies is of great value for our society, they also pose a significant threat to individuals' privacy. As a result legislators for many countries try to regulate the use and the disclosure of confidential information. Data privacy and anonymity have become a mainstream avenue for research. While privacy is a topic discussed everywhere, data anonymity recently established itself as an emerging area of computer science. Its goal is to produce useful computational solutions for releasing data, while providing scientific guarantees that the identities and other sensitive information of the individuals who are the subjects of the data are protected. The PAIS 2008 workshop is the first in its series and its mission is to provide an open yet focused platform for researchers and practitioners from computer science and other fields that are interacting with computer science in the privacy area such as statistics, healthcare informatics, and law to discuss and present current research challenges and advances in data privacy and anonymity research. The workshop program features 8 papers that cover a variety of topics, including distributed privacy protection, query auditing, k-anonymization and its applications, and micro-aggregation based data anonymization. In addition, the program includes an invited speech by Dr. Josep Domingo-Ferrer, the UNESCO Chair in Data Privacy at Rovira i Virgili University of Tarragona, Catalonia. The title of his talk is: "Location Privacy via Unlinkability: An Alternative to Cloaking and Perturbation". We hope that you find this program interesting and thought-provoking.
Technology background of international colaboration on medicine multimedia knowledgebase establishment
Authors: Karel Slavicek, Michal Javornik, Otto Dostal
Venue: Proceedings of the 2nd WSEAS International Conference on Computer Engineering and Applications (2008)

Institute of Computer Science of Masaryk University in cooperation with CESNET are working on the field of supporting medicine multimedia data transport archiving and processing more than ten years. Since first steps like transport of ultrasound and CT images across private fibre optics network these activities have grown up to regional PACS archive. Today more and more hospitals are participating on this project know under the name MediMed and we stand before scaling this project not only to republic wide application but also abroad. This paper describes current state of the art of MediMed project.
N-variant IC design: methodology and applications
Authors: Yousra Alkabani, Farinaz Koushanfar
Venue: Proceedings of the 45th annual Design Automation Conference (2008)

We propose the first method for designing N-variant sequential circuits. The flexibility provided by the N-variants enables a number of important tasks, including IP protection, IP metering, security, design optimization, self-adaptation and fault-tolerance. The method is based on extending the finite state machine (FSM) of the design to include multiple variants of the same design specification. The state transitions are managed by added signals that may come from various triggers depending on the target application. We devise an algorithm for implementing the N-variant IC design. We discuss the necessary manipulations of the added signals that would facilitate the various tasks. The key advantage to integrating the heterogeneity in the functional specification of the design is that we can configure the variants during or post-manufacturing, but removal, extraction or deletion of the variants is not viable. Experimental results on benchmark circuits demonstrate that the method can be automatically and efficiently implemented. Because of its lightweight, N-variant design is particularly well-suited for securing embedded systems. As a proof-of-concept, we implement the N-variant method for content protection in portable media players, e.g., iPod. We discuss how the N-variant design methodology readily enables new digital rights management methods.
Bloggers as experts: feed distillation using expert retrieval models
Authors: Krisztian Balog, Maarten de Rijke, Wouter Weerkamp
Venue: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval (2008)

We address the task of (blog) feed distillation: to find blogs that are principally devoted to a given topic. The task may be viewed as an association finding task, between topics and bloggers. Under this view, it resembles the expert finding task, for which a range of models have been proposed. We adopt two language modeling-based approaches to expert finding, and determine their effectiveness as feed distillation strategies. The two models capture the idea that a human will often search for key blogs by spotting highly relevant posts (the Posting model) or by taking global aspects of the blog into account (the Blogger model). Results show the Blogger model outperforms the Posting model and delivers state-of-the art performance, out-of-the-box.
Biometric Inspired Digital Image Steganography
Authors: Abbas Cheddad, Joan Condell, Kevin Curran, Paul Mc Kevitt
Venue: Proceedings of the 15th Annual IEEE International Conference and Workshop on the Engineering of Computer Based Systems (2008)

Steganography is defined as the science of hiding or embedding “data” in a transmission medium. Its ultimate objectives, which are undetectability, robustness (i.e., against image processing and other attacks) and capacity of the hidden data (i.e., how much data we can hide in the carrier file), are the main factors that distinguish it from other “sisters-in science” techniques, namely watermarking and Cryptography. This paper provides an overview of well known Steganography methods. It identifies current research problems in this area and discusses how our current research approach could solve some of these problems. We propose using human skin tone detection in colour images to form an adaptive context for an edge operator which will provide an excellent secure location for data hiding.
Understanding features in SOA: some experiences from distributed systems
Authors: Norman Wilde, Sharon Simmons, Michael Pressel, Joseph Vandeville
Venue: Proceedings of the 2nd international workshop on Systems development in SOA environments (2008)

Practicing software engineers involved in program maintenance frequently need to locate the code that implements a particular user feature. Researchers have developed several tools and techniques to address this problem. We argue that SOA applications, despite their novel architecture, will continue to face the feature location problem. Lessons learned from experience with earlier systems, especially earlier distributed systems, can be useful in identifying the kinds of tools and techniques that will be needed for SOA.
Application of motor algebra to the analysis of human arm movements
Authors: Sigal Berman, Dario g. Liebermann, Tamar Flash
Venue: Robotica (2008)

Motor algebra, a 4D degenerate geometric algebra, offers a rigorous yet simple representation of the 3D velocity of a rigid body. Using this representation, we study 3D extended arm pointing and reaching movements. We analyze the choice of arm orientation about the vector connecting the shoulder and the wrist, in cases for which this orientation is not prescribed by the task. Our findings show that the changes in this orientation throughout the movement were very small, possibly indicating an underlying motion planning strategy. We additionally examine the decomposition of movements into submovements and reconstruct the motion by assuming superposition of the velocity profiles of the underlying submovements by analyzing both the translational and rotational components of the 3D spatial velocity. This movement decomposition method reveals a larger number of submovement than is found using previously applied submovement extraction methods that are based only on the analysis of the hand tangential velocity. The reconstructed velocity profiles and final orientations are relatively close to the actual values, indicating that single-axis submovements may be the basic building blocks underlying 3D movement construction.
DNA Computing Models, 1 edition
Authors: Zoya Ignatova, Israel Martnez-Prez, Karl-Heinz Zimmermann
Venue: Advances In Information Security (2008)

Sir Francis Crick would undoubtedly be at the front of the line ordering this fascinating book. Being one of the discoverers of DNA, he would be amazed at how his work has been applied to mankind's most important invention, the computer. DNA contains the genetic instructions for the biological development of cellular life forms or viruses. DNA computing uses DNA as a substrate for storing information, while molecular biological operations are used to manipulate this information. DNA Computing Models begins with a comprehensive introduction to the field of DNA computing. This book emphasizes computational methods to tackle central problems of DNA computing, such as controlling living cells, building patterns, and generating nanomachines. DNA Computing Models presents laboratory-scale human-operated models of computation, including a description of the first experiment of DNA computation conducted by Adleman in 1994. It provides molecular-scale autonomous models of computation and addresses the design of computational devices working in living cells. It also addresses the important problem of proper word design for DNA computing. DNA Computing Models is designed for researchers and advanced-level students in computers science, bioengineering and molecular biology as a reference or secondary text book. This book is also suitable for practitioners in industry.
Sherlock: automatically locating objects for humans
Authors: Aditya Nemmaluri, Mark D. Corner, Prashant Shenoy
Venue: Proceeding of the 6th international conference on Mobile systems, applications, and services (2008)

Over the course of a day a human interacts with tens or hundreds of individual objects. Many of these articles are nomadic, relying on human memory to manually index, inventory, organize, search, and locate them. However, Radio Frequency Identification (RFID) tags hold great promise for automating these tasks. While originally envisioned for managing supply chains and store inventories, RFID tags support the properties necessary for helping humans to manage their objects. This paper presents Sherlock, a system that leverages RFID tags for human-object interaction. Sherlock combines concepts from sensors, radar technology, and computer graphics to implement a novel localization and visualization system for everyday objects. At the heart of Sherlock is a new RFID localization technique that uses steerable antennas to sweep a room, discovering, localizing and indexing tagged objects. In response to user queries, Sherlock displays the locations of matching objects using images from a video camera. We have implemented a prototype of Sherlock to conduct experiments in a real office environment. Our results demonstrate the effectiveness of Sherlock in localizing to a volume of less than 0.55 cubic meters for 90% of objects.
A Destructive Evolutionary Algorithm Process
Authors: Joe Sullivan, Conor Ryan
Venue: Proceedings of the 2007 Frontiers in the Convergence of Bioscience and Information Technologies (2007)

This paper describes the application of evolutionary search to the problem of Flash memory wear-out. The current method for establishing memory operating parameters is a time consuming and expensive manual process of destructive testing. Understandably this process is normally undertaken only at design time. The results are sub optimum solutions which do not minimise ware-out over the lifetime of the device. We establish the viability of a hardware platform that utilises an EA (Evolutionary Algorithm) to discover optimal operating parameter settings automatically. Here we describe this hardware and reveal results demonstrating an average life extension of between 250% and 350% over the factory set conditions with a maximum life extension exhibited of 700% for cells within the same device. Furthermore since the process is automated it is possible to leverage the spread between process lots to further enhance device specifications, facilitating the near no cost life extension of a split-gate Flash memory device.
Charmed: From concept to reality&ast;
Authors: Gavin Sade
Venue: Computers in Entertainment (CIE) (2008)

This article provides an introduction to Charmed, a tangible interactive media artwork that explores aspects of daily life in urban environments. The article discusses the conceptual, aesthetic, and technical dimensions of the work, our creative intentions, and the production process. The design and development of Charmed posed many challenges, which will also be addressed in this article, before concluding with discussion and reflections that took place after the first exhibition of the work at Experimenta Playground: International Biennale of Media Arts, Melbourne, Australia in 2007.
Video Wireless Sensor Network: Co-Operative Vision Based Localization Method
Authors: Sharif Amar Mohamed Sharif, Varun Jeoti
Venue: Proceedings of the 2008 Second Asia International Conference on Modelling & Simulation (AMS) (2008)

Localization of the sensor nodes is a major obstacle for practical applications of the wireless sensor networks (WSNs). This Paper presents a cooperative localization method based on vision in wireless sensor networks. Based on the video vision characteristics, the distances between sensor nodes in the network are obtained with respect to some 3 chosen nodes whose locations are apriori known. These in turn allow the estimation of the coordinates of each node. An averaging method is employed to refine the estimation. Some vision experiments are presented that demonstrate the performance of the proposed method and that refinement to the distance estimation.
Smart Platform for Wireless Communication - Case Study
Authors: Radek Kuchta, Radimir Vrba, Vladimir Sulc
Venue: Proceedings of the Seventh International Conference on Networking (2008)

This paper presents main features of a new IQRF wireless communication platform. This platform was developed and designed for home and industrial automation. Some basic functions of OS, development tools and basic modules are described. A case study is discussed at the end of the paper. This is a case study of a sensor network created around a core coordinator and a set of temperature wireless units.
Privacy Concerns of Semantic Web
Authors: Azadeh Nematzadeh, Layla Pournajaf
Venue: Proceedings of the Fifth International Conference on Information Technology: New Generations (2008)

In today's world, security is one of the most important quality attributes in Semantic Web. Semantic Web proposes new security requirements; therefore, previous security mechanisms provide insufficient support for an in-depth treatment of security in Semantic Web. This paper presents the mandatory role of privacy persevering method in access control model, inference and semantic data mining method and trust negotiation technique for applying in Semantic Web. We show the relation among them in order to secure Semantic Web. Privacy persevering method can prevent unauthorized access to confidential information and services further to being a hindrance for disclosure of private personal information.
Software-Based Fault Tolerance: Concept Map-Based Learning
Authors: Goutam Kumar Saha
Venue: Ubiquity (2008)

This paper aims to visually describe the important concepts of software-based fault tolerance and the relationships thereof using a concept map.
Mobility in the virtual office: a document-centric workflow approach
Authors: Ralf Carbon, Gregor Johann, Thorsten Keuler, Dirk Muthig, Matthias Naab, Stefan Zilch
Venue: Proceedings of the 1st international workshop on Software architectures and mobility (2008)

In today's global business, office workers conducting their business have a high demand for mobility. Nevertheless, the software support for workflows and the induced collaboration with other office workers is weak in mobile situations, for instance, while people are traveling. In some situations, no access to centrally provided services is possible; in other situations, this access is difficult to achieve due to security reasons and other technical constraints. Thus, the existing workflow management systems are mostly inappropriate to support mobile office workers and their specific needs. In this paper, we present a document-centric solution to tackle the existing deficiencies in the support of mobile workflow processing. These deficiencies are made explicit in six typical scenarios from the domain of office environments. The core of the solution is a reference architecture dominated by the peer-to-peer style. Hence, the overall office environment is fully decentralized into computational nodes. The documents processed by office workers are packaged together with workflow information in so-called VOF documents and transmitted among the nodes of respective users to execute the overall workflow. In a prototypical implementation, we showed that the concepts introduced are applicable.
Working memory load for faces modulates p300, n170, and n250r
Authors: Helen M. Morgan, Christoph Klein, Stephan G. Boehm, Kimron L. Shapiro, David E. J. Linden
Venue: Journal of Cognitive Neuroscience (2008)

We used event-related potential (ERP) methodology to examine neural activity associated with visual working memory (WM) for faces. There were two main goals. First, to extend previous findings of P300 load modulation to WM for faces. Second, to examine whether N170 and N250r are also influenced by WM load. Between one and four unfamiliar faces were simultaneously presented for memory encoding. After a 1-sec delay, a target face appeared, and participants had to judge whether this face was part of the previous face array. P300 amplitude decreased as WM load increased, and this P300 suppression was observed at both encoding and retrieval. WM load was also found to modulate other ERPs. The amplitude of the N170 elicited by the target face decreased with load, and this N170 decrease leveled off at load 2, reflecting the behavioral WM capacity of around two faces. In addition, the N250r, observed as an ERP difference for target faces that were present in the encoding array relative to target faces that were absent, was also reduced for higher WM loads. These findings extend previous work by showing that P300 modulation by WM load also occurs for faces. Furthermore, we show, for the first time, that WM load affects the N250r and the early visual N170 component. This suggests that higher visual areas play an important role in WM for faces.
Evaluation of underwater spectral data for colour correction applications
Authors: Julia Åhlén, Ewert Bengtsson, David Sundgren
Venue: Proceedings of the 5th WSEAS International Conference on Circuits, Systems, Electronics, Control & Signal Processing (2006)

The inherent properties of water column usually affect underwater imagery by suppressing high-energy wavelengths. One of the inherent properties, diffuse attenuation, can be estimated from multi or hyper spectral data and thus give information on how fast light of different wavelengths decreases with increasing depth. Based on exact depth measurements and data from a spectrometer incoming light on an object can be calculated and diffuse attenuation coefficient can be estimated. In this work the authors introduce a mathematical model that suggests the most stable wavelengths, which corresponds to estimated coefficients, based on spectral information from each depth. These values are then used in reconstruction of colours in underwater imagery. Since there are no digital hyper spectral cameras yet we are for the time being confined to point data, but the method is general and we show how it can be applied on multi spectral images.
Multi-antenna Techniques in Ultra Mobile Broadband Communication Systems
Authors: Michael Mao Wang, Sandip Sarkar, Tamer Kadous, Andy Wang, Alex Gorokhov, Naga Bhushan, Avneesh Agrawal
Venue: Proceedings of the Communication Networks and Services Research Conference (2008)

Theoretically, multi-antenna techniques offers significant capacity benefits, but realizing these gains in deployed wireless systems remains a very challenging problem. MIMO has been used in wireless LAN systems with great success. However, due to the hugely varying spatial profiles and velocity patterns of the Access Terminals, integrating MIMO techniques in a wireless WAN system has been a difficult design problem. This paper introduces the design paradigms of Ultra-Mobile Broadband, which is poised to become the successor of EVDO as the next generation of high speed wireless system. UMB allows the use of MIMO in various forms to suit the deployment scenario, and elicit as much gain as possible.