ppxscal/embedding_network huggingface dataset:
Flow about a round parachute in incompressible flow
Authors: Valentin Adrian Jean Butoescu
Venue: Proceedings of the 10th WSEAS international conference on Mathematical and computational methods in science and engineering (2008)

A vortex model of a round parachute in an incompressible fluid is presented. The canopy surface is replaced by a system of circular vortices located in planes perpendicular to its symmetry axis. The wake is modeled as a vortex sheet that is emanating from the parachute sharp mouth and vent borders subject to the condition that the pressure on these sharp borders remains finite. The wake is allowed to roll up freely. Mathematically the fluid dynamics model leads to a system of four equations of which one is an integral equation that represents the link between the canopy vortex distribution and the normalwash, the second and third give the motion of the free wake, and the fourth one relates the variation of the vorticity on the entire canopy to the vorticity just issued at the sharp edges. A numerical method for solving this system is then given. The wake is replaced by a system of a discrete ring distribution of small, but finite core radii. These radii vary so that the core volumes remain constant. The vortex ring emission problem is solved by in iterative process, so that the flow remains smooth at the canopy edge(s).
Implementing lightweight reservation protocol for mobile network using hybrid schema
Authors: Abdullah Gani, Lina Yang, Nor Badrul Anuar, Omar Zakaria, Ros Surya Taher
Venue: WSEAS Transactions on Computers (2009)

This paper presents our method to improve lightweight reservation protocol. This was inspired by the ever increasing volume of multimedia traffic over the Internet which demanding quality of service beyond the traditional best-effort. The Integrated Services model relies on the Resource reservation Protocol (RSVP) for signaling and reserving resources. RSVP uses the receiver-initiated reservation mechanism to set up the reservation which executes protocol complexity and incurs additional processing and storage overheads on the routers. Due to heavyweight characteristic, many researchers changed the focus to the lightweight reservation protocol. In this paper, we propose a lightweight signaling protocol of Sender-initiated and Mobility-support Reservation Protocol (SMRP) with Crossover Router (COR) as an extension to SMRP. COR scheme cannot provide smooth handover as it affects the SMRP in Mobile hosts. This is the main disadvantage of COR scheme. Pointer Forwarding Scheme makes an advance resource reservation only a forwarding one-step path from the sender along the forwarding chains. In order to make SMRP more suitable for Mobile hosts, we propose a hybrid method combining the advantages of COR scheme with Pointer Forwarding scenarios. We use ns2 Java version network simulator to test it. We evaluate the performance of SMRP in a mobile network environment. The results show that the hybrid scheme can support seamless and also efficient SMRP path rerouting during handoff in respect of decreased the drop probability.
Incremental Construction of Minimal Tree Automata
Authors: Rafael C. Carrasco, Jan Daciuk, Mikel L. Forcada
Venue: Algorithmica (2009)

We describe an algorithm that allows the incremental addition or removal of unranked ordered trees to a minimal frontier-to-root deterministic finite-state tree automaton (DTA). The algorithm takes a tree t and a minimal DTA A as input; it outputs a minimal DTA A&#x2032; which accepts the language L(A) accepted by A incremented (or decremented) with the tree t. The algorithm can be used to efficiently maintain dictionaries which store large collections of trees or tree fragments.
People to People Fundraising: Social Networking and Web 2.0 for Charities
Authors: Ted Hart, James M. Greenfield, Sheeraz D. Haji
Venue:  (2007)

Cutting-edge strategies, data, and techniques from the world's foremost ePhilanthropy experts. Giving donors the chance to participate in and contribute to the success of a charity beyond the online gift is proving to be successful for many nonprofits. Find out how to make the most of your online fundraising efforts with the expert advice found in People to People Fundraising: Social Networking and Web 2.0 for Charities. Featuring a Foreword by James Austin of Harvard University, this hands-on guide is filled with creative ideas, techniques, and suggestions to help readers harness the power of social networking for your charity, including: Getting supporters to do more than give Evaluating your Web site Blogs an important development in fundraising The power of celebrity in building communities How to leverage an individual supporter's social network Online marketing to ethnic and special interest communities How to influence single-gift Web donors to become monthly donors The opportunities and challenges of multi-channel marketing Why ePhilanthropy succeeds seven pillars of e-success Connecting with planned gift donors and prospects Buttons and banners on company Web sites Plus much more! Based on the authors' decades of combined real-life experiences plus scores of international case studies demonstrating ePhilanthropy success stories from around the world, People to People Fundraising provides a wealth of proven, practical techniques to help you boost your organization's success.
Metaheuristic approach to assembly line balancing
Authors: Supaporn Suwannarongsri, Deacha Puangdownreong
Venue: WSEAS TRANSACTIONS on SYSTEMS (2009)

In this paper, the metaheuristic method consisting of the adaptive tabu search (ATS) and the practicing heuristic (PH) technique is proposed to provide optimal solutions of the assembly line balancing (ALB) problems. With the multi-objective approach, the ATS is used to address the number of tasks assigned for each workstation, while the PH is conducted to assign the sequence of tasks for each workstation according to precedence constraints. The proposed approach is tested against six benchmark ALB problems suggested by Scholl and one real-world ALB problem. Comparisons of optimal results obtained by the proposed method with those obtained by the single objective approach are elaborated.
Leveraging use cases in developing service-oriented systems
Authors: Shingo Takada
Venue: Proceeding of the 2008 conference on Knowledge-Based Software Engineering: Proceedings of the Eighth Joint Conference on Knowledge-Based Software Engineering (2008)

Service-oriented systems are systems that combine services that are dispersed over the Internet. System development is normally done by defining a business process or workflow which specifies which services are to be invoked in what order. The specification of the workflow can be done in a top down manner, i.e., the developer first develops an initial specification (workflow), searches for Web services, and then refines the workflow so that the Web services can be invoked. In this paper, we propose supporting the development of the workflow (specifically BPEL document) by suggesting previous development results that could be reused. We focus on requirements (specifically use cases) and correlate use case steps with BPEL activities. This information is stored in a repository. When developing a new service-oriented system, the developer first describes a new use case. This is used to search for similar use cases and their corresponding BPEL documents. The developer uses the information to define the new service-oriented system.
How to Avoid Selecting Bids Based on Overoptimistic Cost Estimates
Authors: Magne Jørgensen
Venue: IEEE Software (2009)

Software development companies often produce overoptimistic cost estimates, which could lead to delivery problems for the clients and the providers. Clients can avoid selecting overoptimistic providers via their control of the bidding process and by following the strategies in this article. Conversely, the author's suggestions also help software providers identify bidding rounds in which it's likely that they'll win only if they're strongly overoptimistic.
Some remarks over the MLS method
Authors: Raducanu Razvan
Venue: Proceedings of the 10th WSEAS international conference on Mathematical and computational methods in science and engineering (2008)

The present paper presents a possible implementation of the Element Free Galerkin method to the study of fracture of Mindlin- Reissner plates. The novelty of this paper resides on the fact that it uses an enriched meshless method (Moving Least Square) around the crack tip in the theory of Mindlin-Reissner plates. This method is especially designed to characterize in a better way the behavior of cracks.
Towards a design theory for online communities
Authors: David Gurzick, Wayne G. Lutters
Venue: Proceedings of the 4th International Conference on Design Science Research in Information Systems and Technology (2009)

Online communities are increasingly important in modern social life. Yet, the diverse collection of guidelines that have directed online community design may not be keeping pace with significant changes in the operating environment of these systems. This paper collects and distills the most relevant of these guidelines and describes their instantiation in a design artifact foundational to a larger design science research project. The core contributions include the distilled guidelines, a detailed account of the mechanics of their translation into practice, and a framework for doing design science research in online communities.
Make: Technology on Your Time Volume 12
Authors: Mark Frauenfelder
Venue:  (2007)

Make, Vol 12 features our special section on digital arts and crafts called "Upload," where you'll learn how to take infrared photographs, shoot movies with custom backgrounds, and make fun-to-watch slideshows of your digital family photos. You'll also learn how to make an extremely loud air whistle, a solar-powered xylophone, and a TV remote control that's powered by your muscles. As usual, you'll find plenty of other exciting how-to projects inside. The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
Accurate diagnosis of induction machine faults using optimal time-frequency representations
Authors: A. Lebaroud, G. Clerc
Venue: Engineering Applications of Artificial Intelligence (2009)

This paper presents a new diagnosis method of induction motor faults based on time-frequency classification of the current waveforms. This method is composed of two sequential processes: a feature extraction and a rule decision. In the process of feature extraction, the time-frequency representation (TFR) has been designed for maximizing the separability between classes representing different faults. The diagnosis is realised in two levels; the first one allows the detection of different faults-bearing fault, stator fault and rotor fault. The second one refines this detection by the determination of severity degree of faults, which are already identified on the previous level. The diagnosis is independent of the level of load. This method is validated on a 5.5kW induction motor test bench.
The Best Damn Exchange, SQL and IIS Book Period
Authors: Henrik Walther, Mark Horninger, Chris Adams
Venue:  (2007)

Exchange, SQL and IIS are at the core of most Microsoft enterprise servers. The 2007 releases of these products, along with the release of Windows Vista and Windows 2008 Server, represents the biggest overhaul of Windows enterprise products since Windows 2000. The dramatic changes to security tools and the addition of features that support "anywhere access" present IT professionals with a steep learning curve. Making certain that these products are configured to meet regulatory compliance requirements adds addtionaly complexity to day-to-day management network management.The Best Damn Exchange, SQL and IIS Book Period delivers an all-in-one reference for Windows System Administrators deploying the 2007 releases of these core Microsoft servers. The coverage is comprehensive, and provides users with just about everything they need to manage a Windows enterprise server. Special Bonus coverage includes how to gather and analyze the many log files generated by these servers. Key Features:* All-in-one coverage includes Exchange, SQL, and IIS Servers* Integrated coverage on all key security features* Bonus coverage includes analyzing server logs and integrating Communicator 2007
Encapsulation and Dynamic Modularity in the π-calculus
Authors: Daniel Hirschkoff, Aurélien Pardon, Tom Hirschowitz, Samuel Hym, Damien Pous
Venue: Electronic Notes in Theoretical Computer Science (ENTCS) (2009)

We describe a process calculus featuring high level constructs for component-oriented programming in a distributed setting. We propose an extension of the higher-order @p-calculus intended to capture several important mechanisms related to component-based programming, such as dynamic update, reconfiguration and code migration. In this paper, we are primarily concerned with the possibility to build a distributed implementation of our calculus. Accordingly, we define a low-level calculus, that describes how the high-level constructs are implemented, as well as details of the data structures manipulated at runtime. We also discuss current and future directions of research in relation to our analysis of component-based programming.
Conceptual universal database language: literature review and the future of database design
Authors: Nikitas N. Karanikolas
Venue: Proceedings of the 2009 Euro American Conference on Telematics and Information Systems: New Opportunities to increase Digital Citizenship (2009)

Today, the restricted data type domains of the relational model affect Information Systems design. We claim another approach where the Information System designers would be able to portray directly the real world in a database model that provides more powerful and composite data types, as those of the real world. However, more powerful databases models need the introduction of data query and manipulation languages that reflect the features of the new composite data types. We introduce such a language and also reveal a direct consequence, which is the introduction of higher database design levels.
Exploring the Learning Effect of a Web-based Learning Community on EMBA Students
Authors: I-Fan Liu, Meng Chang Chen, Yeali Sun
Venue: Proceeding of the 2006 conference on Learning by Effective Utilization of Technologies: Facilitating Intercultural Understanding (2006)

In this paper, we develop a Web-based learning community to assist learners' on-line learning. The subjects of this research are 138 EMBA from a university in Taiwan who have taken a Management course. Most of them worked in Hi-tech companies. The Management course was taught by four co-teachers. The study was carried out from Sep. 2005 to Jan. 2006 --a period of 16 weeks. We explore the learning effect for EMBA students from Web-based learning community. Our important findings are: (1) EMBA students use the Web-based learning platform to obtain more knowledge about management and help to develop good social relationships with their peers. (2) By using the system, busy students can extend the study at home. In addition, the system improves interaction among students. (3) All most students use the discussion room a great deal, while others use it infrequently. (4) EMBA students are active in discussion with case study, which they provide are very interesting for professors and other students to know how other enterprises operate and what obstacles they encounter. (5) The level that different teachers integrate information technology into teaching differs greatly. Finally, we also propose some suggestions for two aspects of web-based learning community.
Alitheia Core: An extensible software quality monitoring platform
Authors: Georgios Gousios, Diomidis Spinellis
Venue: Proceedings of the 2009 IEEE 31st International Conference on Software Engineering (2009)

Research in the fields of software quality and maintainability requires the analysis of large quantities of data, which often originate from open source software projects. Pre-processing data, calculating metrics, and synthesizing composite results from a large corpus of project artefacts is a tedious and error prone task lacking direct scientific value. The Alitheia Core tool is an extensible platform for software quality analysis that is designed specifically to facilitate software engineering research on large and diverse data sources, by integrating data collection and preprocessing phases with an array of analysis services, and presenting the researcher with an easy to use extension mechanism. The system has been used to process several projects successfully, forming the basis of an emerging ecosystem of quality analysis tools.
Student Modeling for Language Tutors
Authors: Sherman Alpert, Joseph E. Beck
Venue: Proceeding of the 2005 conference on Artificial Intelligence in Education: Supporting Learning through Intelligent and Socially Informed Technology (2005)

Student modeling is of great importance in intelligent tutoring and intelligent educational assessment applications. However, student modeling for computer-assisted language learning (CALL) applications differs from classic student modeling in several key ways, including the lack of observable intermediate steps (behavioral or cognitive) involved in successful performance. This workshop will focus on student modeling for intelligent CALL applications, addressing such domains as reading decoding and reading and spoken language comprehension. Domains of interest include both primary (L1) and second language (L2) learning. Hence, the workshop will address questions related to student modeling for CALL, including what types of knowledge ought such a model contain, with what design rationale, and how might information about the user's knowledge be obtained and/or inferred in a CALL context?
Selection Neglect in Mutual Fund Advertisements
Authors: Jonathan J. Koehler, Molly Mercer
Venue: Management Science (2009)

Mutual fund companies selectively advertise their better-performing funds. However, investors respond to advertised performance data as if those data were unselected (i.e., representative of the population). We identify the failure to discount selected or potentially selected data as selection neglect. We examine these phenomena in an archival study (Study 1) and two controlled experiments (Studies 2 and 3). Study 1 identifies selection bias in mutual fund advertising by showing that the median performance rank for advertised funds is between the 79th and 100th percentile. Study 2 finds that both novice investors and financial professionals fall victim to selection neglect in a financial advertising task unless the advertisement makes the selective nature of available performance data transparent. Study 3 shows that selection neglect associated with a large well-known company can be debiased with a simple extrinsic sample space cue, although individual differences in statistical reasoning also matter. We argue that selection neglect results from a general tendency to ignore underlying sample spaces rather than a fundamental misunderstanding about the data selection process or the value of selected data.
Elimination of Useless Neurons in Incremental Learnable Self-Organizing Map
Authors: Atsushi Shimada, Rin-Ichiro Taniguchi
Venue: Proceedings of the 7th International Workshop on Advances in Self-Organizing Maps (2009)

We propose a method to eliminate unnecessary neurons in Variable-Density Self-Organizing Map. We have defined an energy function which denotes the error of the map, and optimize the energy function by using graph cut algorithm. We conducted experiments to investigate the effectiveness of our approach.
Cheating is not playing: Methodological Issues of Computational Game Theory
Authors: Bruno Beaufils, Philippe Mathieu
Venue: Proceeding of the 2006 conference on ECAI 2006: 17th European Conference on Artificial Intelligence August 29 -- September 1, 2006, Riva del Garda, Italy (2006)

Computational Game Theory is a way to study and evaluate behaviors using game theory models, via agent-based computer simulations. One of the most known example of this approach is the famous Classical Iterated Prisoner's Dilemma (CIPD). It has been popularized by Axelrod in the beginning of the eighties and had led him to set up a successful Theory of Cooperation. This use of simulations has always been a challenging application of computer science, and of agent-based approaches, in particular to Social Sciences. It may be viewed as Empirical Game Theory. These kind of approach is often necessary since, in the general case, classical analytical ones do not give suitable results. These tools are also often used when full game-theoretic analysis is intractable. The usual method to evaluate behaviors consists in the collection of strategies, through open contests, and the confrontation of all of them as in a sport championship. Then it becomes, or at least seems to become, easy to evaluate and compare the efficiency of these behaviors. Evaluating strategies can however not be done efficiently without the insurance that algorithms used are well formed and that they can not introduce bias in their computation. It can not be done without tools able to prevent or, at least, measure deviation from the object of the study. Unfortunately people using such simulations often do not take care seriously about all those aspects, because they are not aware of it, and sometimes because they are. We will try to show effects of bad simulations practice on the simplest example. We show methodological issues which have to be taken care of, or avoided in order to prevent trouble in simulation results interpretation. Based on some simple illustration, we exhibit two kinds of bias that could be introduced. We classify them as voluntary or involuntary mistakes. The former ones can be explained by poor design of experimentations whereas the latter can defeat the purpose of the evaluation using simple ideas of agreement and cooperation. We also show the implications on interpretations and conclusions that such errors may produce. We state that scoring/ranking methods are part of the game, and as such have to be described with the game. Many points described may seem to be widely known. We think that with the growth of interest of such methods they have to be detailed and exposed clearly.
The impact of link-layer retransmissions on video streaming in wireless mesh networks
Authors: An Chan, Sung-Ju Lee, Xiaolin Cheng, Sujata Banerjee, Prasant Mohapatra
Venue: Proceedings of the 4th Annual International Conference on Wireless Internet (2008)

Link-layer retransmission is a feature of IEEE 802.11 standard protocol that aims to increase the reliability of data communications. However, when successive retransmissions fail, they add to the traffic congestion, raise the collision probability, and increase the end-to-end delay. Using our 4-hop wireless mesh network testbed, we evaluate the impact of link-layer retransmissions on the performance of video streaming in wireless multi-hop environment. Our experimental results show that when the traffic load is near or exceeds the network capacity, retransmissions cause erratic video quality and increase the end-to-end delay tremendously. When the best-effort traffic coexists, increasing the number of retransmissions degrades the goodput of best-effort traffic and increases the end-to-end delay of video streaming. Retransmissions add reliability and increase the video streaming quality only when the traffic volume is far below the network capacity limit.