ppxscal/embedding_network huggingface dataset:
A model for an effective technology transfer to Iranian automotive industry
Authors: M. Samiei Nasr
Venue: Proceedings of the 8th conference on Simulation, modelling and optimization (2008)

In spite of the tremendous efforts made by those who were actively involved in the automotive industry in Iran, particularly in recent years, the transfer of technology has not taken place as effectively as it has been expected in this industry. Therefore, it is quite necessary for this industry to, first, identify what barriers hinder the effective technological transfer to Iranian automotive industry, and then, to present a model that can suggest the most effective ways through which the Iranian automotive industry can gradually enter the world competitive markets. In the first phase of this study, the impediments, as well as the components of the effective technological transfer were identified through conducting theoretical and field studies. Then, in the second phase, a general model for effective technological transfer to Iranian automotive industry was suggested.
Lead-Acid Battery Monitoring System by Using PC Graphic Control
Authors: Wen-Bin Lin, Kao-Feng Yarn, Tsung-Chan Cheng, Shiang-Xuan Chen, Sen-Ho Wang
Venue: Proceedings of the 2009 International Conference on Electronic Computer Technology (2009)

The PLC （programmable logic controller）plays an important role in the field of industrial automation because of its excellent performance. Its multiple functions include logic arithmetic, calculation, communication, noise resistant and stability. And PC（personal computer）has great ability in rapid calculation coped with the ability to store huge information. In the last 20 years, PC has popularized all over the world because of its cheaper and cheaper price. Accompanied with the popularization of PC and the promotion of the communication technology, Internet has since evolved and been developed, by which we can contact with anybody, anytime and anywhere. The usage of lead-acid battery is increasing in the future. How to improve the charged efficiency of lead-acid battery and enlarge the battery usage life to reduce energy consumption and battery damage is more and more important. In this paper, it is used MITSUBISHI PLC FX2n-32MR to be controlled. The battery is by way of rater and FX-2AD in charging state. The analog and digital data is passed to PLC to be real time monitoring and controlling. Charging is set time and voltage constant to reach optimization charging. On the other hand, using AD590 is to be reference measuring and battery protection in temperature control.
A Self-Managing Wide-Area Data Streaming Service using Model-based Online Control
Authors: Viraj Bhat, Manish Parashar, Mohit Khandekar, Nagarajan Kandasamy, Scott Klasky
Venue: Proceedings of the 7th IEEE/ACM International Conference on Grid Computing (2006)

Efficient and robust data streaming services are a critical requirement of emerging Grid applications, which are based on seamless interactions and coupling between geographically distributed application components. Furthermore the dynamism of Grid environments and applications requires that these services be able to continually manage and optimize their operation based on system state and application requirements. This paper presents a design and implementation of such a self-managing data-streaming service based on online control strategies. A Grid-based fusion workflow scenario is used to evaluate the service and demonstrate its feasibility and performance.
Student-authored Wiki textbook in CS1
Authors: Chris Bennett
Venue: Journal of Computing Sciences in Colleges (2009)

This paper describes an experimental use of Wiki software in an introductory computer science course motivated by a need for an appropriate introductory text, a desire to introduce more writing and group work in the course, and the rising costs of textbooks in general. Students authored the programming text for the course based on their own notes and research, and subsequent semesters' students edited and augmented the existing content. Students are entirely responsible for its contents while the instructor manages the site administration and provides guidance. The textbook remains free and in use, and students have responded very well to it with respect to readability, ease of use, quality, and cost.
Three new cut sets of fuzzy sets and new theories of fuzzy sets
Authors: Xue-hai Yuan, Hongxing Li, E. Stanley Lee
Venue: Computers Mathematics with Applications (2009)

Three new cut sets are introduced from the view points of neighborhood and Q-neighborhood in fuzzy topology and their properties are discussed. By the use of these cut sets, new decomposition theorems, new representation theorems, new extension principles and new fuzzy linear mappings are obtained. Then inner project of fuzzy relations, generalized extension principle and new composition rule of fuzzy relations are given. In the end, we present axiomatic descriptions for different cut sets and show the three most intrinsic properties for each cut set.
Periodic solutions of competition Lotka-Volterra dynamic system on time scales
Authors: Liang Zhang, Hong-Xu Li, Xiao-Bing Zhang
Venue: Computers Mathematics with Applications (2009)

In this paper, we rigorously establish an existence theorem of periodic solutions for the competition of Lotka-Volterra dynamic systems with a time delay and diffusion on time scales. It is shown that the existence of periodic solutions depend on the parameters of the model. It is also shown that a known result in the literature can can carry over quite easily to its discrete counterpart, and a much more accurate result can be obtained when studying the dynamic system on time scales. Moreover, one example is given to illustrate the result obtained.
PAM–securing Linux boxes everywhere
Authors: Federico Kereki
Venue: Linux Journal (2009)

How to implement Linux security checks.
Projection Representation of Mazurkiewicz Traces
Authors: Łukasz Mikulski
Venue: Fundamenta Informaticae (2008)

The behavior of infinite traces is an interesting field for studies. Infinite traces can be described using projections to word monoids. Such projection representations can be generalized to projection sets. To complete simple descriptions, the binary operation from projection sets to traces has been defined. After such preparations some properties of infinite traces are discussed.
Riordan group involutions and the Δ-sequence
Authors: Gi-Sang Cheon, Sung-Tae Jin, Hana Kim, Louis W. Shapiro
Venue: Discrete Applied Mathematics (2009)

Several important combinatorial arrays, after inserting some minus signs, turn out to be involutions when considered as lower triangular matrices. Among these are the Pascal, RNA, and directed animal matrices. These examples and many others are in the Bell subgroup of the Riordan group. We characterize all such pseudo-involutions by means of a single sequence called the @D-sequence. Finally we compute the @D-sequences for the powers of a pseudo-involution in the Bell subgroup.
An experimental investigation of personality types impact on pair effectiveness in pair programming
Authors: Panagiotis Sfetsos, Ioannis Stamelos, Lefteris Angelis, Ignatios Deligiannis
Venue: Empirical Software Engineering (2009)

In this paper, pair programming is empirically investigated from the perspective of developer personalities and temperaments and how they affect pair effectiveness. A controlled experiment was conducted to investigate the impact of developer personalities and temperaments on communication, pair performance and pair viability-collaboration. The experiment involved 70 undergraduate students and the objective was to compare pairs of heterogeneous developer personalities and temperaments with pairs of homogeneous personalities and temperaments, in terms of pair effectiveness. Pair effectiveness is expressed in terms of pair performance, measured by communication, velocity, design correctness and passed acceptance tests, and pair collaboration-viability measured by developers' satisfaction, knowledge acquisition and participation. The results have shown that there is important difference between the two groups, indicating better communication, pair performance and pair collaboration-viability for the pairs with heterogeneous personalities and temperaments. In order to provide an objective assessment of the differences between the two groups of pairs, a number of statistical tests and stepwise Discriminant Analysis were used.
Analysis and design of mobile Wireless Social Model
Authors: Zhi-Ting Lin, Yu-Gui Qu, Xiao-Fang Zhou, Bao hua Zhao
Venue: Computer Communications (2009)

Delay Tolerant Networks (DTNs) are characterized by very long delay paths and frequent network partitions. Most existing protocols are based on simplistic models which differ from real scenarios or real traces which do not allow for sensitivity analysis. In this paper, we analyze the differences between the Social Network (SN) and the Wireless Social Network (W-SN) in terms of the clustering coefficient, characteristic path length, community size, and membership number. We observe that the clustering coefficient, community size and membership number in the W-SN are bigger than those in the SN, while the character path length in W-SN becomes smaller. And then we propose a new Wireless Social Model (WSM) based on community character. Node in WSM is driven by the &alpha;-Model and has an equal probability to move to one of his adjacent vertices. We evaluate our model via real traces supplied by Dartmouth College, which shows that our wireless social mobile model offers a good approximation of real movements.
The Effectiveness of Personalization in Delivering E-learning Classes
Authors: Leyla Zhuhadar, Elizabeth Romero, Robert Wyatt
Venue: Proceedings of the 2009 Second International Conferences on Advances in Computer-Human Interactions (2009)

In this paper we present an evaluation methodology of personalized delivery of multimedia resources in an e-learning platform that takes advantage of web 2.0 technologies and its standards, such as (i) streaming using RSS and Atom feeds, (ii) searching using meta-data search engine, (iii) delivering using ubiquitous computing and (iv) personalized learning. Our framework consists of the following phases: (1) tracking the preferred delivery mechanism for each student model, (2) measuring the effect of the semantic profile time window parameter, (3) clustering students models based on similarity metrics on the delivery preferences and (4) comparing the results between personalized and non-personalized delivery. One important aspect of our approach is the combination of personalization and the data driven extraction (via clustering) of the students models based on similarity metrics. Our experimental results show that personalized delivery increases the usage of e-learning materials and the percentage of reviewing multimedia resources if these materials are delivered in ways that fit students preferences.
On why left events are the right ones: Neural mechanisms underlying the left-hemifield advantage in rapid serial visual presentation
Authors: Rolf Verleger, Andreas Sprenger, Sina Gebauer, Michaela Fritzmannova, Monique Friedrich, Stefanie Kraft, Piotr Jaśkowski
Venue: Journal of Cognitive Neuroscience (2009)

When simultaneous series of stimuli are rapidly presented left and right, containing two target stimuli T1 and T2, T2 is much better identified when presented in the left than in the right hemifield. Here, this effect was replicated, even when shifts of gaze were controlled, and was only partially compensated when T1 side provided the cue where to expect T2. Electrophysiological measurement revealed earlier latencies of T1-and T2-evoked N2pc peaks at the right than at the left visual cortex, and larger right-hemisphere T2-evoked N2pc amplitudes when T2 closely followed T1. These findings suggest that the right hemisphere was better able to single out the targets in time. Further, sustained contralateral slow shifts remained active after T1 for longer time at the right than at the left visual cortex, and developed more consistently at the right visual cortex when expecting T2 on the contralateral side. These findings might reflect better capacity of right-hemisphere visual working memory. These findings about the neurophysiological underpinnings of the large right-hemisphere advantage in this complex visual task might help elucidating the mechanisms responsible for the severe disturbance of hemineglect following damage to the right hemisphere.
Estimating stochastic volatility models using daily returns and realized volatility simultaneously
Authors: Makoto Takahashi, Yasuhiro Omori, Toshiaki Watanabe
Venue: Computational Statistics Data Analysis (2009)

Realized volatility, which is the sum of squared intraday returns over a certain interval such as a day, has recently attracted the attention of financial economists and econometricians as an accurate measure of the true volatility. In the real market, however, the presence of non-trading hours and market microstructure noise in transaction prices may cause bias in the realized volatility. On the other hand, daily returns are less subject to noise and therefore may provide additional information on the true volatility. From this point of view, modeling realized volatility and daily returns simultaneously based on the well-known stochastic volatility model is proposed. Empirical studies using intraday data of Tokyo stock price index show that this model can estimate realized volatility biases and parameters simultaneously. The Bayesian approach is taken and an efficient sampling algorithm is proposed to implement the Markov chain Monte Carlo method for our simultaneous model. The result of the model comparison between the simultaneous models using both naive and scaled realized volatilities indicates that the effect of non-trading hours is more essential than that of microstructure noise and that asymmetry is crucial in stochastic volatility models. The proposed Bayesian approach provides an estimate of the entire conditional predictive distribution of returns under consideration of the uncertainty in the estimation of both biases and parameters. Hence common risk measures, such as value-at-risk and expected shortfall, can be easily estimated.
Visualization of Simulated Urban Spaces: Inferring Parameterized Generation of Streets, Parcels, and Aerial Imagery
Authors: Carlos A. Vanegas, Daniel G. Aliaga, Bedřich Beneš, Paul Waddell
Venue: IEEE Transactions on Visualization and Computer Graphics (2009)

Urban simulation models and their visualization are used to help regional planning agencies evaluate alternative transportation investments, land use regulations, and environmental protection policies. Typical urban simulations provide spatially distributed data about number of inhabitants, land prices, traffic, and other variables. In this article, we build on a synergy of urban simulation, urban visualization, and computer graphics to automatically infer an urban layout for any time step of the simulation sequence. In addition to standard visualization tools, our method gathers data of the original street network, parcels, and aerial imagery and uses the available simulation results to infer changes to the original urban layout and produce a new and plausible layout for the simulation results. In contrast with previous work, our approach automatically updates the layout based on changes in the simulation data and thus can scale to a large simulation over many years. The method in this article offers a substantial step forward in building integrated visualization and behavioral simulation systems for use in community visioning, planning, and policy analysis. We demonstrate our method on several real cases using a 200 GB database for a 16,300 km2 area surrounding Seattle, Washington.
Low-complexity Grouping Spectrum Management in Multi-user DSL Networks
Authors: Shen Wei, Li Youming, Yu Miaoliang
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 01 (2009)

Dynamic spectrum management is an important technique for mitigating crosstalk in DSL system. A novel dynamic spectrum management algorithm with low computational complexity is proposed in this paper. In the algorithm, we group the users from the length of the user lines, and use a virtual reference line to replace the lines in each group. After grouping, spectrum allocation and bit-loading are implemented among reference lines. Then all the other users in the same group use the same spectrum allocation scheme as on the relative reference line. In this way, the computational complexity is reduced dramatically. Computer simulation results based on measured DSL channels show the effectiveness of the proposed algorithm.
Solution of matrix Riccati differential equation for nonlinear singular system using genetic programming
Authors: P. Balasubramaniam, A. Vincent Antony Kumar
Venue: Genetic Programming and Evolvable Machines (2009)

In this paper, we propose a novel approach to find the solution of the matrix Riccati differential equation (MRDE) for nonlinear singular systems using genetic programming (GP). The goal is to provide optimal control with reduced calculation effort by comparing the solutions of the MRDE obtained from the well known traditional Runge Kutta (RK) method to those obtained from the GP method. We show that the GP approach to the problem is qualitatively better in terms of accuracy. Numerical examples are provided to illustrate the proposed method.
An automatic optical-simulation-based lithography hotspot fix flow for post-route optimization
Authors: Yang-Shan Tong, Chia-Wei Lin, Sao-Jie Chen
Venue: Proceedings of the 2009 international symposium on Physical design (2009)

In this paper, an automatic lithography hotspot fix guidance generation method based on optical simulation engine and a fix flow utilizing this method are proposed. We find that subject to shape changes of original layout, there is strong correlation between the optical intensity maps of pre-OPC and post-OPC layouts. From this fact, we develop a fix action generation method by optimizing optical intensity in terms of polygon changes near a litho hotspot in a pre-OPC layout. Fix guidances as a subset of fix actions of a hotspot can be selected by a greedy method. The fix guidances are used as input to router to fix the hotspots. We integrate this fix guidance generation method with commercial lithography hotspot detection tool to create a post-route lithography hotspot fixing flow and test with industry 65nm designs. Compared with commercial flow, our method has 1.4X~1.9X fix rate with similar run time. The circuit timing impact is negligible in both our flow and industry flow. And our flow will not introduce any new design rule check (DRC) violation.
Overview of the Ground-to-Orbit Lasercom Demonstration
Authors: K. E. Wilson, J. R. Lesh, K. Araki, Y. Arimoto
Venue: Space Communications (1998)

The Ground-to-Orbit Lasercom Demonstration conducted between the ETS-VI spacecraft and the ground station at JPL&rsquo;s Table Mountain Facility, Wrightwood CA was the first ground-to-space two-way optical communications experiment. The demonstration was conducted over a period of seven months and required simultaneous and cooperative operations by team members in Tokyo and California. A key objective was to measure the atmospheric attenuation and seeing during the demonstration to evaluate the performance of the optical link. The optical downlink telemetry provided information on the in-orbit performance of ETS-VI&rsquo;s laser communications equipment. Downlinked PN data enabled measurement of bit-error rates. BERs as low as 10$^{-4}$ were measured on the uplink and 10$^{-5}$ on the downlink. Measured signal powers (corrected for measured atmospheric attenuation) agreed with theoretical predictions.
MEDYM: match-early with dynamic multicast for content-based publish-subscribe networks
Authors: Fengyun Cao, Jaswinder Pal Singh
Venue: Proceedings of the ACM/IFIP/USENIX 2005 International Conference on Middleware (2005)

Design of distributed architectures for content-based publish-subscribe (pub-sub) service networks has been a challenging problem. To best support the highly dynamic and diversified content-based pub-sub communication, we propose a new architectural design called MEDYM - Match-Early with DYnamic Multicast. MEDYM follows the End-to-End distributed system design principle. It decouples a pub-sub service into two functionalities: complex, application-specific matching at network edge, and simple, generic multicast routing in the network. This architecture achieves low computation cost in event matching and high network efficiency and flexibility in event routing. For higher scalability, we describe a novel approach to extend MEDYM to a hierarchy structure called H-MEDYM, which effectively balances the trade-off between event delivery efficiency and server states maintenance. We evaluate MEDYM and H-MEDYM using detailed simulations and real-world experiments, and compare them with major existing design approaches. Results show that MEDYM and H-MEDYM achieve high event delivery efficiency and system scalability, and their advantages are most prominent when user subscriptions are highly selective and diversified.
T-homotopy and Refinement of Observation (I): Introduction
Authors: Philippe Gaucher
Venue: Electronic Notes in Theoretical Computer Science (ENTCS) (2009)

This paper is the extended introduction of a series of papers about modelling T-homotopy by refinement of observation. The notion of T-homotopy equivalence is discussed. A new one is proposed and its behaviour with respect to other construction in dihomotopy theory is explained.
Electronic transport through GaN/AlN single barriers: Effect of polarisation and dislocations
Authors: S. Leconte, L. Gerrer, E. Monroy
Venue: Microelectronics Journal (2009)

In this work, we study electronic and conduction properties of a single AlN barrier (thickness from 0.5 to 5nm) embedded in GaN. The electronic structure was simulated using a self-consistent Schrodinger-Poisson solver, and verified by photoluminescence (PL) measurements. For 0.5- and 1-nm-thick barriers, we can identify the PL line related to recombination from the first electron confined level at the bottom interface of the barrier to the first hole confined level at the top interface. The PL evolution with bias reveals that most of the applied voltage drops in the depleted cap layer. Carrier transport was studied using conductive atomic force microscopy (C-AFM). Reference GaN layers display a rectifying behaviour between the C-AFM tip and the GaN surface. In samples with a barrier thickness from 1 to 3nm, blockage by the barrier results in negligible current under direct bias, except for hot spots at dislocations (density ~1x10^7cm^-^2). Finally, in samples with 5-nm-thick AlN barriers, a high-current density appears at reverse bias, which assigned to defects induced by AlN relaxation, as verified by transmission electron microscopy.
Dual-threshold pass-transistor logic design
Authors: Lara D. Oliver, Krishnendu Chakrabarty, Hisham Z. Massoud
Venue: Proceedings of the 19th ACM Great Lakes symposium on VLSI (2009)

This paper introduces pass-transistor logic design with dual-threshold voltages. A set of single-rail, fully restored, pass-transistor gates are presented. Logic transistors are implemented with low threshold voltages and signal restoration transistors with high threshold voltages. Simulation is used to characterize the leakage power consumption, switching energy, and propagation delay of the proposed gates. A method to reduce circuit power by selectively replacing CMOS gates with the proposed gates is discussed and applied to the ISCAS'85 benchmark circuits. Relative to circuits composed entirely of conventional CMOS gates, use of the proposed SDPL gates achieves up to 49% reduction in leakage power and up to 63% reduction in total power consumption.