ppxscal/embedding_network huggingface dataset:
Policy Control Model: A Key Factor for the Success of Policy in Telecom Applications
Venue: Proceedings of the Fifth IEEE International Workshop on Policies for Distributed Systems and Networks (2004)

The application of policy in telecommunicationsnetworks is still in its initial stages. Since networkelements lack native policy mechanisms, the impact ofusing policy, instead of SNMP or CLI basedconfiguration, is not clearly understood. This paperpresents a "Policy Control Model" and self-organisingcapabilities that network elements mustexhibit to realise the policy potential for makingservice management simpler and more efficient. In thiscontext, we discuss the importance of roles, propose aseparation of functionality that makes policy solutionsadaptable to diverse operational environments, andstudy the benefits of self-organising network elementsobtaining their policy configurations through astateless pull mechanism.
Materialization of fragmented views in multidimensional databases
Authors: Matteo Golfarelli, Vittorio Maniezzo, Stefano Rizzi
Venue: Data Knowledge Engineering (2004)

The most effective technique to enhance performances of multidimensional databases consists in materializing redundant aggregates called views. In the classical approach to materialization, each view includes all and only the measures of the cube it aggregates. In this paper we investigate the benefits of materializing views in vertical fragments, aimed at minimizing the workload response time. We formalize the fragmentation problem as a 0-1 integer linear programming problem, which is then solved by means of a standard integer programming solver to determine the optimal fragmentation for a given workload. Finally, we demonstrate the usefulness of fragmentation by presenting a large set of experimental results based on the TPC-H benchmark.
Nonlinear Modeling on Protein Kinase C(PKC)-Epsilon Inverse Regulation of Stress Fibers in Oncogenically Transformed Cells
Authors: Yingxin Li, Carol A. Heckman, Julie A. Barnes
Venue: Proceedings of the 2004 IEEE Computational Systems Bioinformatics Conference (2004)

Phorbol 12-myristate 13-acetate (PMA), a tumor promoter, provides effective means of reversibly converting tissue culture cells to a state which resembles that of transformed cells. PKC isozymes can be activated by PMA and cause reorganization of actin-containing structures. The purpose of the current research is to analyze the pattern in which PKC mediates dissolution of stress fibers (SFs) by a mathematical model. Several mathematical models were tried, including linear and nonlinear approximations, in order to establish the relationship between PKC-¿ and SF accumulation in 1000 W cells. Applying a non-linear approximation and using a bisection algorithm, an exponential function was derived to show how PKC-¿ inversely controlled SFs. We use RNA interference (RNAi) technology to knock down the PKC-¿ expression in order to validate this mathematical model. In the time course of SF formation following PMA exposure, a special feature of parallel arrays showed in cells with PKC-¿ siRNA transfection.
Knowledge Sharing and Value Flow in the Software Industry: Searching the Patent Citation Network
Authors: David Dreyfus, Bala Iyer
Venue: Proceedings of the Proceedings of the 38th Annual Hawaii International Conference on System Sciences (HICSS'05) - Track 3 - Volume 03 (2005)

A firm's innovative capabilities depend on its ability to learn from the environment. To learn from the environment a firm must have access to external knowledge, and it must have the absorptive capacity to identify, assimilate and exploit such knowledge. While previous research recognized that firms must invest to acquire absorptive capacity, it assumed that access to knowledge spillovers is free, or a perfectly correlated component of R&D investments. We argue that a firm must also invest in developing organizational routines that search for and acquire access to knowledge spillover. In order to explore the relationship between own-knowledge development and search, we examine the relationship between software firms' R&D investments and their position within the patent citation network and their subsequent knowledge development and financial performance. The results show that a firm's position within the knowledge flow of the industry helps predict knowledge development and financial performance.
Role Ordering Scheduler for Concurrency Control in Distributed Objects
Authors: Tatsuya Nozaki, Tomoya Enokido, Makoto Takizawa
Venue: Proceedings of the Parallel and Distributed Systems, Tenth International Conference (2004)

Concepts of roles are significant to design and implementaccess control models in secure information systems. A roleshows a job function in an enterprise. In addition to keepingsystems secure, objects have to be consistent in presenceof multiple transactions. Traditional locking protocolsand timestamp ordering schedulers are based on principles"first-comer-winner" and "timestamp order" to make multipletransactions serializable, respectively. Each transactionis associated with a role. We define significancy of rolewhere shows how significant each role is in an enterprise.We discuss a novel type of scheduler for concurrency controlso that multiple conflicting transactions are serializablein a significant order of roles of transactions.
Large-Scale Circuit Placement: Gap and Promise
Authors: Jason Cong, Tim Kong, Joseph R. Shinnerl, Min Xie, Xin Yuan
Venue: Proceedings of the 2003 IEEE/ACM international conference on Computer-aided design (2003)

Placement is one of the most important steps in the RTL-to-GDSII synthesis process, as it directly defines the interconnects, which have become the bottleneck in circuit andsystem performance in deep submicron technologies. Theplacement problem has been studied extensively in the past30 years. However, recent studies show that existing placement solutions are surprisingly far from optimal. The first part of this tutorial summarizes results from recent optimality and scalability studies of existing placement tools. Thesestudies show that the results of leading placement tools fromboth industry and academia may be up to 50% to 150% awayfrom optimal in total wirelength. If such a gap can be closed,the corresponding performance improvement will be equivalent to several technology-generation advancements. Thesecond part of the tutorial highlights the recent progress onlarge-scale circuit placement, including techniques for wirelength minimization, routability optimization, and performance optimization.
Introduction from the Session Chair: Advances in Web Computing
Authors: Konrad Klockner
Venue: Proceedings of the 30th EUROMICRO Conference (2004)

This session is an opportunity for designers and researchers to discuss their experiences with implementing cooperative systems on the Web in large organizations such as industry, government and academia. It is open for sharing information about new Web technologies and practices.
Binding, Allocation and Floorplanning in Low Power High-Level Synthesis
Authors: A. Stammermann, D. Helms, M. Schulte, A. Schulz, W. Nebel
Venue: Proceedings of the 2003 IEEE/ACM international conference on Computer-aided design (2003)

This work is a contribution to high level synthesis for lowpower systems.While device feature size decreases, interconnectpower becomes a dominating factor.Thus it is importantthat accurate physical information is used during high-level synthesis.We propose a new power optimisation algorithm for RT-levelnetlists.The optimisation performs simultaneously slicing-treestructure-based floorplanning and functional unit binding andallocation.Since floorplanning, binding and allocation can use theinformation generated by the other step, the algorithm can greatlyoptimise the interconnect power.Compared to interconnect unawarepower optimised circuits, it shows that interconnect powercan be reduced by an average of 41.2%, while reducing overallpower by 24.1% on an average.The functional unit power remainsnearly unchanged.These optimisations are not achieved atthe expense of area.
A dynamic application-driven data communication strategy
Authors: Paul van der Mark, Lex Wolters, Gerard Cats
Venue: Proceedings of the 18th annual international conference on Supercomputing (2004)

The use of semi-Lagrangian formulations in numerical weather predication models (NWP) allows for an increase in time step size. Use of this method can increase performance of these models. However, on parallel architectures, communication between processors can become a huge bottleneck, limiting speedup. Furthermore, the communication pattern is dependent on the application's execution. We discus a novel strategy, called Halo on Demand, which dynamically drives the communication between the processors by examining the content of the data at runtime in order to reduce communication costs. With an extensive performance analysis of the execution of the model we show that our strategy can decrease communication time and thus decrease total execution time.
Intrinsic and extrinsic implementation of a bio-inspired hardware system
Authors: B. Glackin, L. P. Maguire, T. M. McGinnity
Venue: Information Sciences&mdash;Informatics and Computer Science: An International Journal (2004)

Due to the complexity of modern day systems and the fact that most real world problems are not fixed but rather change with time, it is necessary to look for new methodologies and strategies to deal with reliability problems. Practical experience has demonstrated that the goal of building totally fault-free systems, although desirable, is impossible to achieve. Considering these observations and taking inspiration from biology, this project attempts to create an adaptive hardware system that is capable of modifying its architecture and thus its behaviour autonomously, to cope with variations in its external environment. The adaptive hardware system takes the form of a neurofuzzy network implemented on an FPGA device. Two alternative approaches are implemented, extrinsic and intrinsic, and results detailing the performance of the two are presented and compared.
Accelerating the Kernels of BLAST with an Efficient PIM (Processor-In-Memory) Architecture
Authors: Jung-Yup Kang, Sandeep Gupta, Jean-Luc Gaudiot
Venue: Proceedings of the 2004 IEEE Computational Systems Bioinformatics Conference (2004)

BLAST is a widely used tool to search for similarities in protein and DNA sequences. However, the kernels of BLAST are not efficiently supported by general-purpose processors because of the special computational requirements of the kernels.
dbSwitch&trade;: towards a database utility
Authors: Shaul Dar, Gil Hecht, Eden Shochat
Venue: Proceedings of the 2004 ACM SIGMOD international conference on Management of data (2004)

Savantis Systems' dbSwitch&trade; is an innovative commercial product providing database server virtualization and advancing a database utility model. The dbSwitch enables a new architecture, called a Database Area Network (DAN), which pools database server resources and shares them among multiple database applications. Specific benefits of the DAN architecture for enterprise data centers include server consolidation, improved utilization, high availability and capacity management. We describe the major components of the dbSwitch, namely routing of application requests to database instances, optimization of database server resources and capacity visualization and manipulation. We also relate dbSwitch to recent work on utility and grid computing.
Visibility and Measurability for Trust Management in Cooperative Business Operations
Authors: Malu Castellanos, Fabio Casati, Ming-Chien Shan, Umeshwar Dayal
Venue: Proceedings of the E-Commerce Technology for Dynamic E-Business, IEEE International Conference (2004)

Trust is essential to establish relationships with other entities like business partners and service providers. A key aspect of trust is transparency. Only by having a certain level of visibility into what others are doing on our behalf, we can build trust in our relationships with them. In this paper we present a framework and a platform for trust management that facilitates visibility and measurability into the execution of requested or outsourced services. The key benefit of the proposed approach is that service providers can offer visibility over their processes in a selective fashion, by allowing providers to define process-oriented views over business operations and by letting prospective and current customers assess process execution quality without exposing confidential information.
Extracting Characteristic Patterns from Genome - Wide Expression Data by Non-Negative Matrix Factorization
Authors: Nini Rao, Simon J. Shepherd
Venue: Proceedings of the 2004 IEEE Computational Systems Bioinformatics Conference (2004)

In this paper, we propose a novel approach, which is called as nonnegative matrix factorization (NMF), to analyze genome wide expression data. One of NMF advantages is that it can directly process these data without normalization. Firstly, we design an optimal algorithm for NMF approach. Compared with the existing NMF algorithms, our algorithm is more stable and converges very fast. We have coded the final algorithm in highly optimized C. Secondly; we describe the use of NMF in the extraction of the characteristic patterns from genome wide expression data. Thirdly, some simulation experiments are made in order to verify the efficiency of NMF algorithm. our conclusions are that NMF can be used as a powerful tool to extract the biologically meaningful expression patterns from genomic wide expression data.
Analysis of an Energy Efficient Optimistic TMR Scheme
Authors: Dakai Zhu, Rami Melhem, Daniel Mosse, Elmootazbellah (Mootaz) Elnozahy
Venue: Proceedings of the Parallel and Distributed Systems, Tenth International Conference (2004)

For mission critical real-time applications, such assatellite and surveillance systems, a high level of reliabilityis desired as well as low energy consumption. Inthis paper, we propose a general system power modeland explore the optimal speed setting to minimize systemenergy consumption for an Optimistic TMR (OTMR)scheme. The performance of OTMR is compared with thatof TMR and Duplex with respect to energy and reliability.The results show that OTMR is always better than TMRby achieving higher levels of reliability and consumingless energy. With checkpoint overhead and recovery, Duplexis not applicable when system load is high. However,Duplex may be more energy efficient than OTMR dependingon system static power and checkpointing overhead.Moreover, with one recovery section, Duplex achievescomparable levels of reliability as that of OTMR.
A Web Services Based Framework for Voice over IP
Authors: Markus Hillenbrand, Ge Zhang
Venue: Proceedings of the 30th EUROMICRO Conference (2004)

Currently, more and more enterprises adopt the Voice over IP (VoIP) technology to replace their traditional circuit switching infrastructure in order to reduce the cost of their telephony services. The most frequently used VoIP solutions are made up of stand-alone software - usually complex and requiring extra hardware in a local area network. Some VoIP service providers offer Website based or plug-in based solutions, which are, however, difficult to integrate with other applications by the end user. Web services provide functionality over the Internet using various standards like XML and HTTP, independently of the operating system and programming language. In this paper, we propose a framework for Voice over IP based on Web services. Service providers using this framework can offer their customers a protocol-neutral Web service interface, thus enabling the deployment of a general and integrated VoIP solution. Because of the simplified logic, a client in this system is easy to implement and can communicate with clients in other systems without additional local hardware for VoIP.
Mining Deviants in Time Series Data Streams
Authors: S. Muthukrishnan, Rahul Shah, Jeffrey Scott Vitter
Venue: Proceedings of the 16th International Conference on Scientific and Statistical Database Management (2004)

One of the central tasks in managing, monitoring andmining data streams is that of identifying outliers. There isa long history of study of various outliers in statistics anddatabases, and a recent focus on mining outliers in datastreams. Here, we adopt the notion of "deviants" from Jagadishet al [Mining Deviants in a Time Series Database] as outliers. Deviants are based on one ofthe most fundamental statistical concept of standard deviation(or variance). Formally, deviants are defined basedon a representation sparsity metric, i.e., deviants are valueswhose removal from the dataset leads to an improvedcompressed representation of the remaining items. Thus, deviantsare not global maxima/minima, but rather these areappropriate local aberrations. Deviants are known to be ofgreat mining value in time series databases.We present first-known algorithms for identifying deviantson massive data streams. Our algorithms monitorstreams using very small space (polylogarithmic in datasize) and are able to quickly find deviants at any instant,as the data stream evolves over time. For all versions of thisproblem-uni- vs multivariate time series, optimal vs near-optimalvs heuristic solutions, offline vs streaming-our algorithmshave the same framework of maintaining a hierarchicalset of candidate deviants that are updated as the timeseries data gets progressively revealed. We show experimentallyusing real network traffic data (SNMP aggregate timeseries) as well as synthetic data that our algorithm is remarkablyaccurate in determining the deviants.
Evaluating the effectiveness of ICT to support globally distributed PBL teams
Authors: Chew Swee Cheng, Chris Beaumont
Venue: ACM SIGCSE Bulletin (2004)

In the 21st century it is becoming increasingly common to work and learn in teams that are globally distributed. Such teams rely heavily on ICT to facilitate communication. There are many communication tools and technologies to choose from. This study investigates the effectiveness of a rich set of tools and considers if synergy exists between them. This paper reports and analyses the use of communication tools by students in a distributed Problem-based Learning (dPBL) environment. The PBL teams consisted of four students from Singapore and four from the UK. Teams had a rich set of synchronous and asynchronous communication tools available to them, including ISDN videoconference, WebCam video/audio, Microsoft NetMeeting® Chat, Asynchronous drop box and threaded discussion Forum. This ethnographic study showed that semantic discussion threads included the use of all tools and enabled students to effectively co-construct meaning (and understanding). Students were able to deploy the use of different tools effectively to achieve the learning outcomes intended for various stages in the PBL cycle, with both asynchronous and synchronous media being considered of high importance.
Multi-User FPGA Co-Simulation over TCP/IP
Authors: Daniel Denning, James Irvine, Derek Stark, Malachy Devlin
Venue: Proceedings of the 15th IEEE International Workshop on Rapid System Prototyping (2004)

FPGA Co-simulation of an IP core is animportant design flow step in IP and SystemDevelopment. In this paper we discuss how, withXilinxýs System Generator for DSP 3.1 (XSG), it ispossible for multiple-users to hardware cosimulateIP cores over any distance via TCP/IP,sharing only one FPGA board resource. Thehardware co-simulation strategy is mutuallyexclusive in that only one user at any one timecan hardware co-simulate on the FPGA board.We demonstrate this with the use of twoencryption cores, Camellia and AES-128(Advanced Encryption Standard), which haveboth been generated using the block-based tool.The sharing of the FPGA board is handled with aset of Matlab function commands.
Tool-Supported Customization of UML Class Diagrams for Learning Complex System Models
Venue: Proceedings of the 12th IEEE International Workshop on Program Comprehension (2004)

To employ an existing software library, its structureshould be first learned and the required elements should beidentified. This can be challenging if the library is largeand only a specific part of it should be comprehended. Inthis paper, we study the problem of learning complex softwarelibraries modeled in UML. It is argued that the learningprocess can be supported with a tool environment thatallows the customization of the UML model according tothe context of the learner, stepwise and dynamically chosenlearning tasks, and focusing on a particular learning concernat a time. We show how such an environment can beachieved based on the concept of a pattern, using existingtool support. We demonstrate the idea with a part of Symbianplatform architecture. The approach is evaluated in acase study where a pattern-driven learning environment isconstructed for JPEG interchange file format specifications.
How to "Rightsize" an Ontology: A Case of Ontology-Based Web Information Management to Improve the Service for Handicapped Persons
Authors: Ralf Klischewski
Venue: Proceedings of the Database and Expert Systems Applications, 15th International Workshop (2004)

The paper describes the first steps of improving the semantic integration of Web information services for handicapped persons in the area of Hamburg, Germany. To specify the informational resources in use, an ontology is suggested building on three main concepts: (1) a partonomy of physical objects of which the attributes represent most of the relevant information, (2) a simple taxonomy of informational objects, (3) a relation between the informational objects and those physical objects they inform about. It is argued that the presentation of a domain-specific ontology based on these concepts has convinced the stakeholders involved to increase their cooperation in order to meet the informational needs of handicapped people moving around the Hamburg area. Summarizing the lessons learned it is discussed how taking into account stakeholder perspectives contributes to "rightsizing" an ontology to support Web information management.
On a generalization of the Oberwolfach problem
Authors: N. J. Cavenagh, S. I. El-Zanati, A. Khodkar, C. Vanden Eynden
Venue: Journal of Combinatorial Theory Series A (2004)

Let e1, e2, ..., en be a sequence of nonnegative integers such that the first non-zero term is not one. Let Σi - 1n ei = (q - 1)/2, where q = pn and p is an odd prime. We prove that the complete graph on q vertices can be decomposed into e1 Cpn-factors, e2 Cpn - 1-factors, ..., and en Cp-factors.
Geotemporal querying of multilingual documents
Authors: Fredric C. Gey, Aitao Chen, Ray Larson, Kim Carl
Venue: Proceedings of the 27th annual international ACM SIGIR conference on Research and development in information retrieval (2004)

This demonstration utilizes a geographic information system interface to display multilingual news documents in time and space by extracting place names from text and matching them to a multilingual multi-script gazetteer which identifies the latitude and longitude of the location.
Dimensions of power and IS implementation
Authors: Gurpreet Dhillon
Venue: Information and Management (2004)

This paper analyzes the failure of an initiative of the Nevada Department of Motor Vehicles (DMV) and Public Safety. It argues that an inability to understand power relationships during systems analysis, design, and implementation has serious implication on the well being of an organization and its business processes; thus, it is a key factor in IS's project failure. The argument is conducted by evaluating various dimensions of power. Lessons are drawn that return to the importance of considering organizational power issues in implementing a successful computer-based system and in realizing an information technology enabled strategic change initiative.