ppxscal/embedding_network huggingface dataset:
A method on multiple trigonometric regressions
Authors: Cristian Constantinescu, Marian Pearsica, Constantin Strimbu, Ioan-Gheorghe Ratiu, Laurian Gherman
Venue: Proceedings of the 8th Wseas international conference on Telecommunications and informatics (2009)

This paper is proposing a statistical method, useful for analyzing phenomena whose equations are impossible to be solved analytically. The input data consist in a collection of tabled functions, (numerically determined), named further database. Least square method based algorithms, presented in the first part of the paper, and is applied to this database. First, a trigonometric regression algorithm will find the approximating Fourier coefficients. Finally a multiple regression algorithm to fit trigonometric type function (sin, cos) is introduced. Its input data may be the Fourier coefficients, the Fourier analysis results, or whatever collection of experimental data corresponding to a set of variables. The final part of the paper is dedicated to an example, illustrative for these.
Sum of squares method for sensor network localization
Authors: Jiawang Nie
Venue: Computational Optimization and Applications (2009)

We formulate the sensor network localization problem as finding the global minimizer of a quartic polynomial. Then sum of squares (SOS) relaxations can be applied to solve it. However, the general SOS relaxations are too expensive to implement for large problems. Exploiting the special features of this polynomial, we propose a new structured SOS relaxation, and discuss its various properties. When distances are given exactly, this SOS relaxation often returns true sensor locations. At each step of interior point methods solving this SOS relaxation, the complexity is $\mathcal{O}(n^{3})$ , where n is the number of sensors. When the distances have small perturbations, we show that the sensor locations given by this SOS relaxation are accurate within a constant factor of the perturbation error under some technical assumptions. The performance of this SOS relaxation is tested on some randomly generated problems.
Why an AI research team adopted XP practices
Authors: Pavan K. Vejandla, Linda B. Sherrell
Venue: Proceedings of the 47th Annual Southeast Regional Conference (2009)

In this paper, researchers describe their early experiences of using agile techniques while developing a solution to a specific, multi-objective real world problem called the United States Navy Sailors' Assignment Problem (SAP). Because the investigators are working in a research environment where the results produced at intermediate stages cause the requirements to continually change, an agile software development methodology was deemed most appropriate. Although the research team applied several agile practices, the paper emphasizes their experiences when performing test-first or test-driven development (TDD). When applying test-first development, the programmer writes test cases in the designated programming language prior to composing functional code. The objective during code implementation is to write code to pass a particular test case. Thus, the activities of specifying test cases, coding, and testing comprise an iterative process. As a part of this work, the authors compare test-driven development to the more traditional approaches of testing.
Individualized feedback and simulation-based practice in the Tactical Language Training System: An experimental evaluation
Authors: Carole R. Beal, W. Lewis Johnson, Richard Dabrowski, Shumin Wu
Venue: Proceeding of the 2005 conference on Artificial Intelligence in Education: Supporting Learning through Intelligent and Socially Informed Technology (2005)

Students worked with versions of the Tactical Language Training System for Arabic that varied in the provision of individualized feedback, and access to a simulation environment for practicing foreign language skills. Post test results indicated that feedback led to stronger learning outcomes. Students who worked with the complete TLTS rated it as comparable to working one-on-one with a human instructor.
Managing assumptions during agile development
Authors: Ireo Ostacchini, Michel Wermelinger
Venue: Proceedings of the 2009 ICSE Workshop on Sharing and Reusing Architectural Knowledge (2009)

The assumptions that underlie software development often go unrecorded and form part of the implicit rationale on which design and implementation decisions are based. These assumptions can fail at any time, with serious consequences. This paper presents a lightweight approach to assumption management (AM) designed to suit agile development.
Toward an analytic framework for understanding and fostering peer-support communities in using and evolving software products
Authors: Andrew Gorman, Gerhard Fischer
Venue: Proceedings of the fourth international conference on Communities and technologies (2009)

The fundamental challenge for social computing is to contribute to fostering communities in which humans can transcend the limitation of the unaided,individual human mind by helping each other.Going beyond antidotal examples requires an analytical framework in which to interpret data in order to understand the context- and application-specific nature of these collaborations. We have studied peer-support communities (PSCs) in the context of the SAP Community Network (SCN), which relies on forums and conferences to support their collaboration. This research attempts to create a deeper understanding of the effectiveness of social support provided by peers in software development communities from the following perspectives: Responsiveness--how responsive are communities to the needs of its members? Engagement Intensity--how timely is the peer support? Role Distribution--how wide is the participation of users and in what kind of roles do they participate? Reward System--what is the impact of explicit reward (point) systems on community behavior? The data gained from analyzing these perspectives (and their comparison with open source software peer-support communities) has provided insights and led to an increased understanding of what works in PSCs. Here we articulate some initial design guidelines to further improve the potential benefits gained from these communities.
Congestion and Flow Control in the Context of the Message-Oriented Protocol SCTP
Authors: Irene Rüngeler, Michael Tüxen, Erwin P. Rathgeb
Venue: Proceedings of the 8th International IFIP-TC 6 Networking Conference (2009)

Congestion and flow control are key mechanisms used to regulate the load in modern packet networks. The new IETF Stream Control Transmission Protocol (SCTP) inherited these algorithms from the Transmission Control Protocol (TCP). Although the principles used are the same, some issues arise from the fact that SCTP operates message-oriented whereas TCP operates byte-stream oriented. SCTP also supports bundling of multiple small user messages into one SCTP packet. As a consequence, the overall overhead of an SCTP packet depends on the user message size and the number of user messages that are bundled into the packet. RFC 4960 defining SCTP does not specify whether the message specific headers have to be considered when updating the parameters for congestion control. We will show that neglecting the additional headers when calculating outstanding bytes can lead to unfairness towards TCP connections. We will also show that incorrect handling of the additional memory needed to process each message in the flow control calculations will lead to an exhaustion of the receiver window resulting in a huge amount of unnecessary retransmissions. Based on experiments with the flow control of the SCTP implementations available in several operating systems, we will identify the issues and analyze them by using simulations. As a result, we will present solutions that will lead to fairness towards TCP and reduce the number of retransmissions substantially. Although we will focus on SCTP, the results are also true for other message-oriented protocols using bundling.
Improved Parameterized Set Splitting Algorithms: A&#x00a0;Probabilistic Approach
Authors: Jianer Chen, Songjian Lu
Venue: Algorithmica (2009)

In this paper, we study parameterized algorithms for the set splitting problem, for both weighted and unweighted versions. First, we develop a new and effective technique based on a probabilistic method that allows us to develop a simpler and more efficient deterministic kernelization algorithm for the unweighted set splitting problem. We then propose a randomized algorithm for the weighted set splitting problem that is based on a new subset partition technique and has its running time bounded by O *(2 k ), which is significantly better than that of the previous best deterministic algorithm (which only works for the simpler unweighted set splitting problem) of running time O *(2.65 k ). We also show that our algorithm can be de-randomized, which leads to a deterministic parameterized algorithm of running time O *(4 k ) for the weighted set splitting problem and gives the first proof that the problem is fixed-parameter tractable.
Employers' satisfaction and perceptions of the technological skills required for the workforce
Authors: Maryfriend Shepard
Venue:  (2008)

This study examined employer satisfaction with employees' technological skills to identify the need for technological proficiency improvement in the areas of computer, information, and integration literacy. Toffler's theory of technological change and innovation was used as the theoretical base of this study. The theory stated that by increasing students' ability to adapt to changes at a faster rate, they will be ready to adapt to society's ever-changing technological needs, when they become a part of the workforce. A quantitative, nonexperimental, correlational analysis was selected to address the two research questions. The first research question asks if there is a correlation between the employers' perception of employees' competency in the technology skills brought to the job and employers' satisfaction regarding employees' technology job performance; while the second question asks if there is a correlation between employers' perception of the importance of technological skills needed to successfully meet job requirements and the perceived need for employees to improve in those skills. A researcher-designed survey was used to gather data. The results indicated significant correlations exist between perceived employee technology competency and employer satisfaction as well as between perceived importance of computer and integration skills and employees' need for improvement in those skills. This information can be used to promote social change through the implementation in technological literacy education to improve students' opportunities to obtain jobs, in enforcing technology literacy as a requirement for college graduation, and in changing the technological curriculum design at higher educational institutions to further align with the workforce needs.
Meshless Virtual Cloth
Authors: Weiran Yuan, Yujun Chen, André Gagalowicz
Venue: Proceedings of the 4th International Conference on Computer Vision/Computer Graphics CollaborationTechniques (2009)

A systematic description of a novel physically-based virtual cloth simulation method using meshless models is carried out in this paper. This method is based upon continuum mechanics and discretized without explicit connections between nodes. The mechanical behavior of this cloth model is consistent and is independent of the resolution. Kirchhoff-Love (KL) thin shell theory is used as the basis of the cloth model. Approaches to the parametrization and boundary sewing problems are presented to suit with meshless models. Furthermore, a co-rotational method is proposed in order to take care of large deformation problems. As for the collision solution, a new shape-function-based collision detection method is developed for meshless parameterized surfaces. The experimental results show that our cloth simulation model based upon meshless methods can produce natural and realistic results.
Scheduling in multi-channel wireless networks: rate function optimality in the small-buffer regime
Authors: Shreeshankar Bodas, Sanjay Shakkottai, Lei Ying, R. Srikant
Venue: Proceedings of the eleventh international joint conference on Measurement and modeling of computer systems (2009)

We consider the problem of designing scheduling algorithms for the downlink of cellular wireless networks where bandwidth is partitioned into tens to hundreds of parallel channels, each of which can be allocated to a possibly different user in each time slot. We prove that a class of algorithms called Iterated Longest Queues First (iLQF) algorithms achieves the smallest buffer overflow probability in an appropriate large deviations sense. The class of iLQF algorithms is quite different from the class of max-weight policies which have been studied extensively in the literature, and it achieves much better performance in the regimes studied in this paper.
Neural coding and contextual influences in the whisker system
Authors: Rasmus S. Petersen, Stefano Panzeri, Miguel Maravall
Venue: Biological Cybernetics (2009)

A fundamental problem in neuroscience, to which Prof. Segundo has made seminal contributions, is to understand how action potentials represent events in the external world. The aim of this paper is to review the issue of neural coding in the context of the rodent whiskers, an increasingly popular model system. Key issues we consider are: the role of spike timing; mechanisms of spike timing; decoding and context-dependence. Significant insight has come from the development of rigorous, information theoretic frameworks for tackling these questions, in conjunction with suitably designed experiments. We review both the theory and experimental studies. In contrast to the classical view that neurons are noisy and unreliable, it is becoming clear that many neurons in the subcortical whisker pathway are remarkably reliable and, by virtue of spike timing with millisecond-precision, have high bandwidth for conveying sensory information. In this way, even small (~200&#x00a0;neuron) subcortical modules are able to support the sensory processing underlying sophisticated whisker-dependent behaviours. Future work on neural coding in cortex will need to consider new findings that responses are highly dependent on context, including behavioural and internal states.
History-based merging of models
Authors: Maik Schmidt, Sven Wenzel, Timo Kehrer, Udo Kelter
Venue: Proceedings of the 2009 ICSE Workshop on Comparison and Versioning of Software Models (2009)

Model-driven development in collaborative teams requires services for merging models. Such services should have the same quality as one is used to for source code. The constraints which are relevant in model driven engineering imply that the merging of models must be implemented differently than merging of texts. Based on the analysis of these constraints, we present an approach for merging models that attains a high level of consistency of the merged models and minimizes the loss of effort due to conflict resolution.
The nomination number of adolescent social networks
Authors: Hsieh-Hua Yang, Chyi-In Wu, Man Kit Lei, Hung-Jen Yang
Venue: Proceedings of the 8th Wseas international conference on Telecommunications and informatics (2009)

For social network analysis, the most common method used to generate social network data is the method of Name Generator. Nonetheless, the number of nomination has been an unsolved mystery for social networkers. Namely, for each respondents, to name how many people are good enough to generate a stable network, which is able to represent the truly association structure among these respondents, still, is an empirical research question for researchers. This study devoted to explore this question and to provide a preliminary answer. A set of social network data was collected from a sample of Taipei metropolitan junior high schools, including 44 classes. In each class the students were asked to nominate ten best friends in the intimate order. It was supposed that in each class has ten sociometric data for different nomination, and the total amount of sociometric data was 440. The software UCINET6.0 was applied to analyze the social network variables, and NEGOPY4.30 to define the network position. Comparing the betweenness, constraint, and efficiency, this study found that two names will generate more diverse network position with unstable structure, three names are the minimum to get more stable network structure, four or five names are needed to observe the links between boys and girls, but more than five names seem to be redundancy.
RF and Microwave Passive and Active Technologies, 1st edition
Authors: Mike Golio, Janet Golio
Venue:  (2007)

In the high frequency world, the passive technologies required to realize RF and microwave functionality present distinctive challenges. SAW filters, dielectric resonators, MEMS, and waveguide do not have counterparts in the low frequency or digital environment. Even when conventional lumped components can be used in high frequency applications, their behavior does not resemble that observed at lower frequencies. RF and Microwave Passive and Active Technologies provides detailed information about a wide range of component technologies used in modern RF and microwave systems. Updated chapters include new material on such technologies as MEMS, device packaging, surface acoustic wave (SAW) filters, bipolar junction and heterojunction transistors, and high mobility electron transistors (HMETs). The book also features a completely rewritten section on wide bandgap transistors.
A Classroom Practice of Error-Based Simulation as Counterexample to Students' Misunderstanding of Mechanics
Authors: Tomoya Horiguchi, Isao Imai, Takahito Toumoto, Tsukasa Hirashima
Venue: Proceeding of the 2007 conference on Supporting Learning Flow through Integrative Technologies (2007)

This paper reports on the practice of a lesson in a junior high school in which Error-based Simulation (EBS) was used for helping students learn elementary mechanics. EBS simulates the motion of mechanical system assuming that students' erroneous solutions were correct, which has been proved to be effective through laboratory experiments [4, 6, 7, 9]. Twenty-four students participated in the lesson of 110minutes and learned mechanics by using the system which generates and shows EBS. They also worked on the pre-/post-/delay-tests and were interviewed by the teacher after the lesson. The results are: (1) the lesson in this practice caused the greatly motivated learning activities through which the students discovered the knowledge of mechanics by themselves, (2) it had great effect to improve and keep the students' performance in solving mechanics problems, and (3) the usability of the system was sufficient for the practice in classroom lessons. From these results, we got a good prospect for practical use of EBS in more large-scale and continuous lessons in junior high school.
Support Method for Source Code Modification in Changing GUI Widgets
Authors: Junko Shirogane, Kazuhiro Fukaya, Yoshiaki Fukazawa
Venue: Proceeding of the 2006 conference on Knowledge-Based Software Engineering: Proceedings of the Seventh Joint Conference on Knowledge-Based Software Engineering (2006)

Recently, the expansion of the range of users has led to the increase in the importance of software usability. To realize usable software, it is efficient to repeat the process of evaluating and improving GUIs. In this process, it is often necessary to replace the GUI widgets. In this case, we have to change the connection between GUI codes and logic codes. However, it is difficult for developers to find and modify the codes to be changed in the source code. In this research, we propose a method of finding the modification codes in the source code automatically and of suggesting instructions on developers how to modify them.
Interaction Torque Control by Impedance Control of Space Robots
Authors: Pushparaj Mani Pathak, Amalendu Mukherjee, Anirvan Dasgupta
Venue: Simulation (2009)

This paper presents a control scheme for interaction torque control through impedance control at the interface of the end-effector and the environment. The impedance control is achieved by introduction of passive degrees of freedom (DOF) in the controller of the robotic system. Due to the interaction between the robot tip and the environment, the interaction torques act on the tip which gets transmitted through links to the base of the vehicle and the orientation of the vehicle changes. The orientation is restored back to the initial value using a reaction wheel as an attitude controller. The behavior of the space robot with torque and attitude controller is discussed.
Introduction to Design of Experiments with JMP Examples, Third Edition, 3rd edition
Authors: Jacques Goupy, Lee Creighton
Venue: Sas Press (2007)

Illustrated with numerous real-world examples borrowed from a broad base of industries, Introduction to Designed Experiments with JMP Examples, Third Edition, employs a gentle, progressive approach to using designed experiments. The book covers basic ideas, terminology, and the application of techniques necessary to conduct a study using the design of experiments (DOE) framework. This edition addresses a wide array of designs, such as these: full-factorial designs fractional-factorial designs response surface designs, including composite, Box-Behnken, and Doehlert designs mixture designs optimal designs discrete-variable designs The text is written for researchers and engineers who want to create well-organized experiments and obtain results that will yield the best possible information and insights. JMP software is integrated throughout the text and examples of the book, allowing you to solve problems efficiently, make decisions, and gain experience using JMP software. This title was previously published by Dunod under EAN 9782100056064.
Ontology Libraries for Production Use: The Finnish Ontology Library Service ONKI
Authors: Kim Viljanen, Jouni Tuominen, Eero Hyvönen
Venue: Proceedings of the 6th European Semantic Web Conference on The Semantic Web: Research and Applications (2009)

This paper discusses problems of creating and using ontology library services in production use. One approach to a solution is presented with an online implementation--the Finnish Ontology Library Service ONKI-- that is in pilot use on a national level in Finland. ONKI contributes to previous research on ontology libraries in many ways: First, mashup and web service support with various tools is provided for cost-efficient utilization of ontologies in indexing and search applications. Second, services covering the different phases of the ontology life cycle are provided. Third, the services are provided and used in real world applications on a national scale. Fourth, the ontology framework is being developed by a collaborative effort by organizations representing different application domains, such as health, culture, and business.
Robust Surface Fitting from Two Views using Restricted Correspondence
Authors: Simon Collings, Ryszard Kozera, Lyle Noakes
Venue: Journal of Mathematical Imaging and Vision (2009)

The restricted correspondence problem is the task of solving the classical stereo correspondence problem when the surface being observed is known to belong to a family of surfaces that vary in a known way with one or more parameters. Under this constraint the surface can be extracted far more robustly than by classical stereo applied to an arbitrary surface, since the problem is solved semi-globally, rather than locally for each epipolar line. Here, the restricted correspondence problem is solved for two examples, the first being the extraction of the parameters of an ellipsoid from a calibrated stereo pair. The second example is the estimation of the osculating paraboloid at the frontier points of a convex object.