ppxscal/embedding_network huggingface dataset:
Development of computer-assisted virtual field trips to support multidisciplinary learning
Authors: Astrid R. Jacobson, Roberta Militello, Philippe C. Baveye
Venue: Computers Education (2009)

Multidisciplinary courses are being developed at a number of US colleges and universities to highlight the connections between the rise or fall of world civilizations and the sustainable or unsustainable uses of soil and water resources. The content presented in these courses is complex because it includes concepts from disciplines as varied as geology, soil science, politics, economics, history, and anthropology. The learning goals for the courses include developing skills in the critical analysis of complex ''real-world'' problems for which there is often no simple or correct solution. Didactic materials for such courses are limited. Field trips to sites around the world that present some of the issues covered in the course would be ideal, but are logistically challenging. We considered that a series of virtual field trips (VFTs) to sites around the world would allow us to present students with complicated real-world situations, with which to practice critical analysis skills. The VFTs envisaged are neither tutorials nor field/lab exercises. Rather, they are meant to be complex, multi-faceted representations of a past or current civilization and how it affects or is affected by its environment. We expect that the students will use the VFTs to explore the relationships between physical geography and culture and how the decisions or actions of a civilization impact natural resources and the environment and thus affect its fate. A goal of the VFTs is that through consideration of their experiences, students arrive at novel associations that lead to dynamic in-class dialogue about the material presented and a deeper understanding of the intricacies of the situation in the field. This article describes the process of assembling a VFT, and analyzes the technological and didactic choices the process requires. Our experience with a pilot VFT suggests that no single medium (i.e., video clips, interactive maps, animation sequences, etc.) is comprehensive enough to meet the course learning goals. Thus, a web-based, open architecture format was selected for the VFTs because of its simplicity, flexibility and extensibility. Each medium was selected for its ability to support the course learning goals. The learning process was mediated by the VFT text, questions for thought, and in-class discussions. Preliminary results with the pilot VFT are encouraging.
AlphaSum: size-constrained table summarization using value lattices
Authors: K. Selçuk Candan, Huiping Cao, Yan Qi, Maria Luisa Sapino
Venue: Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology (2009)

Consider a scientist who wants to explore multiple data sets to select the relevant ones for further analysis. Since the visualization real estate may put a stringent constraint on how much detail can be presented to this user in a single page, effective table summarization techniques are needed to create summaries that are both sufficiently small and effective in communicating the available content. In this paper, we first argue that table summarization can benefit from knowledge about acceptable value clustering alternatives for clustering the values in the database. We formulate the problem of table summarization with the help of value lattices. We then provide a framework to express alternative clustering strategies and to account for various utility measures (such as information loss) in assessing different summarization alternatives. Based on this interpretation, we introduce three preference criteria, max-min-util (cautious), max-sum-util (cumulative), and pareto-util, for the problem of table summarization. To tackle with the inherent complexity, we rely on the properties of the fuzzy interpretation to further develop a novel ranked set cover based evaluation mechanism (RSC). These are brought together in an AlphaSum, table summarization system. Experimental evaluations showed that RSC improves both execution times and the summary qualities in AlphaSum, by pruning the search space more effectively than the existing solutions.
Agent Reasoning with Semantic Web in Web Blogs
Authors: Dinh Que Tran, Tuan Nha Hoang
Venue: Proceedings of the 11th Pacific Rim International Conference on Multi-Agents: Intelligent Agents and Multi-Agent Systems (2008)

The Web pages contain lots of useful information but their complex layouts, unstructures and semantics are becoming obstacles for autonomous software agents in querying as well as processing. Various studies for representing web information as well as reasoning to infer useful knowledge are active topics in semantic web. This paper focuses on presenting an architecture of a multi-agent system with reasoning ability in web blog domain. The system includes classes of agents: crawler agents extract relevant data from various web blog resources and then convert it to the form of OWL, reasoning agents makes use of these resources and reasoning mechanism to infer necessary information so that user agents get and dispatch the result to mobile phone user.
Pathwise approximation of stochastic differential equations on domains: higher order convergence rates without global Lipschitz coefficients
Authors: A. Jentzen, P. E. Kloeden, A. Neuenkirch
Venue: Numerische Mathematik (2009)

We study the approximation of stochastic differential equations on domains. For this, we introduce modified It&#x00f4;&#x2013;Taylor schemes, which preserve approximately the boundary domain of the equation under consideration. Assuming the existence of a unique non-exploding solution, we show that the modified It&#x00f4;&#x2013;Taylor scheme of order &#x03b3; has pathwise convergence order &#x03b3; &#x2212; &#x03b5; for arbitrary &#x03b5; >&#x00a0;0 as long as the coefficients of the equation are sufficiently differentiable. In particular, no global Lipschitz conditions for the coefficients and their derivatives are required. This applies for example to the so called square root diffusions.
Numerical analyses of peel demolding for UV embossing of high aspect ratio micro-patterning
Authors: L. P. Yeo, S. C. Joshi, Y. C. Lam, Mary B. Chan-Park, D. E. Hardt
Venue: Microsystem Technologies (2009)

Ultraviolet (UV) embossing, involving molding against micro-structured molds, is a quick and efficient method to mass produce high aspect ratio micro-features. A crucial challenge to the repeatability and large-scale application of this technique is successful demolding, which escalates in difficulty with increasing aspect ratio, due to increased polymer-mold mechanical interlocking. Some of the key factors affecting UV embossing include the crosslinked polymer shrinkage and material properties, interfacial strength between polymer to mold and the demolding method. This paper presents a new method to simulate the demolding of UV cured polymer from a nickel mold. Hyperelastic material model and rate-independent cohesive zone modeling were employed in the numerical simulation; linear elastic polymer response, although relatively easy to apply, was not adequate. Progressive shrinkage was implemented, leading to delamination of the polymer-mold interface. The subsequent peeling of the cured polymer from the mold was modeled with increasing prescribed displacement. The optimal shrinkage degree was found to increase from 0.92 to 1.9% with increasing mold aspect ratio (aspect ratio is defined as height to width ratio) from 5 to 10.
Four-wave mixing-based phase sensitive amplification with pulsed signal input
Authors: Xiaosheng Xiao, Ping Shum
Venue: Proceedings of the 2008 International Conference on Advanced Infocomm Technology (2008)

The four-wave mixing (FWM)-based phase sensitive amplification (PSA) with pulsed signal input is investigated. A set of exact analytical solutions for the output amplitude and phase of PSA is derived, taking into account the pump depletion and the self- and cross-phase modulation (SPM and XPM) from pumps, signal and idler. Simplified analytical expression of output idler power is obtained, which shows that, the amplified signal/idler pulse will be compressed firstly due to the phase distortion of input signal, then will be broadened due to pump-depletion.
Dual-quorum replication for edge services
Authors: Lei Gao, Mike Dahlin, Jiandan Zheng, Lorenzo Alvisi, Arun Iyengar
Venue: Proceedings of the ACM/IFIP/USENIX 2005 International Conference on Middleware (2005)

This paper introduces dual-quorum replication, a novel data replication algorithm designed to support Internet edge services. Dual-quorum replication combines volume leases and quorum based techniques in order to achieve excellent availability, response time, and consistency the references to each object (a) tend not to exhibit high concurrency across multiple nodes and (b) tend to exhibit bursts of read-dominated or write-dominated behavior. Through both analytical and experimental evaluation of a prototype, we show that the dual-quorum protocol can (for the workloads of interest) approach the excellent performance and availability of Read-One/Write-All-Async (ROWA-A) epidemic algorithms without suffering the weak consistency guarantees and resulting design complexity inherent in ROWA-Async systems.
A Novel Blind Watermarking Scheme in Contourlet Domain Based on Singular Value Decomposition
Authors: Shao-min Zhu, Jian-ming Liu
Venue: Proceedings of the 2009 Second International Workshop on Knowledge Discovery and Data Mining (2009)

In this paper, a novel blind digital image watermarking scheme in contour let domain with singular value decomposition is proposed. In contrast to traditional methods where the watermark bits are embedded directly on the contourlet transform coefficients, the proposed scheme is based on watermark bits embedding on the singular value of the selected blocks within lowpass subband of the original gray image contourlet transform. Experimental results demonstrate that the quality of watermarked image is robust against attacks such as JPEG compression, low pass filtering, noise addition, scaling and cropping. Watermark extraction is efficient and blind in the sense only quantization strategies but not the original image is required.
A novel regression analysis of economy and trade cooperation between china and Japan under East Asia economic integration
Authors: Yu Sun, Guoxin Wu, Changchun Gao
Venue: Proceedings of the 3rd WSEAS international conference on Computer engineering and applications (2009)

This paper analyzes the integration of East Asian economy and today's trade and economy cooperation between China and Japan and believes that the economics and trade cooperation between China and Japan promotes the process of East Asian economic integration. Interior and exterior effect of economics and trade cooperation between two countries are analyzed. By quantitative analysis in econometrics and applying non-linear regression equations, we make regression analysis and point forecast to get conclusion that a strong relativity is in between two countries. Finally, the corresponding policy to both countries trade cooperation is proposed.
A more efficient and secure dynamic ID-based remote user authentication scheme
Authors: Yan-yan Wang, Jia-yong Liu, Feng-xia Xiao, Jing Dan
Venue: Computer Communications (2009)

In 2004, Das, Saxena and Gulati proposed a dynamic ID-based remote user authentication scheme. This scheme allows users to change and choose passwords freely, and the server does not maintain any verifier table. It is also secure to against ID-theft, replay attacks and insider attacks and so on. However, research has been done to point that it is completely insecure for its independent of the password. Furthermore, it did not achieve mutual authentication and could not resist impersonate remote server attack. In this paper, an enhanced password authentication scheme which still keeps the merits of the original scheme was presented. Security analysis proved that the improved scheme is more secure and practical.
A QoS Driven Web Service Composition Method Based on ESGA (Elitist Selection Genetic Algorithm) with an Improved Initial Population Selection Strategy
Authors: Shuanyu Dong, Weiqing Dong
Venue: International Journal of Distributed Sensor Networks (2009)

With more and more web services being applied, the quality of service (QoS) becomes an important criterion in a service selection. We propose a UDDI process with QoS extension to support quality requests. Service providers can send functional and QoS information to the UDDI registry. As a component of the UDDI registry, the QoS calculator calculates the QoS value of each service to decide the optimal service and send the information back to the UDDI registry. After receiving the requestor's feedback, the QoS calculator re-calculates QoS of the service. In a service composition, component services and the composed service should satisfy local and global restrictions respectively. The QoS of component services aggregate to QoS of the composed service according to an aggregation rule. The QoS parameters may conflict with each other, so this problem is actually a multi-objective optimization. A service selection can be seen as a path formation and each node of the path is a service class. A genetic algorithm can be used to solve complicated global optimization problems. It is proved that a simplex genetic algorithm cannot converge to optimal global solution but the elitist selection genetic algorithm (ESGA) can. So we use ESGA to solve this problem. We use integer encoding as the encoding rule. A composed service can be seen as a chromosome and a gene is an integer that represents a service number in its service class. We use an initial population selection strategy instead of the random initial population creation method. In the strategy, if the fitness of a new composed service is worse than the average fitness of the selected composed services, it should be abandoned, otherwise it should be kept. We coordinate these objectives by assigning a weight to each parameter and the fitness function is the weighted sum of QoS parameters. In the stage of genetic operation, the penalty function is subtracted from the fitness of the composed service if it does not satisfy the restrictions. We use the roulette wheel selection method, single point crossover operator, and uniform mutation operator as genetic operators. It is shown that this method has better performance than the method using ESGA through an experiment.
Office Noise
Authors: Mads Johansen, Torben Søttrup, Karsten Madsen, Lærke Enemark
Venue: ACM SIGGRAPH ASIA 2008 computer animation festival (2008)

A short film about two very different colleagues and the tense situation that builds up as the tidy rooster gets increasingly annoyed with the clumsy elephant.
Interval-valued intuitionistic fuzzy ideals of K-algebras
Authors: Muhammad Akram, Karamat H. Dar, Biao Long Meng, K. P. Shum
Venue: WSEAS Transactions on Mathematics (2008)

The notion of interval-valued intuitionistic fuzzy sets was first introduced by Atanassov and Gargov in 1989 as a generalization of both interval-valued fuzzy sets and intuitionistic sets. In this paper we first apply the concept of interval-valued intuitionistic fuzzy sets to K-algebras. Then we introduce the notion of interval-valued intuitionistic fuzzy ideals (IIFIs, in short) of K-algebras and investigate some interesting properties. We characterize Artinian and Noetherian K-algebras by considering IIFIs of a K-algebra K: Characterization theorems of fully invariant and characteristic IIFIs are also discussed.
A DSP-enhanced 32-bit embedded microprocessor
Authors: Hyun-Gyu Kim, Hyeong-Cheol Oh
Venue: Journal of Embedded Computing (2009)

EISC (Extendable Instruction Set Computer) is a compressed code architecture developed for embedded applications. In this paper, we propose a DSP-enhanced embedded microprocessor based on the 32-bit EISC architecture. We present how we could exploit the special features, and how we could overcome the weaknesses, of the EISC architecture to accelerate DSP applications with a relatively low hardware overhead. Our simulations and experiments show that the proposed DSP-enhanced processor reduces the average execution times of the DSP kernels and DSP applications considered in this work, by 42.5% and 31.3% respectively. The proposed DSP enhancements cost about 10300 gates and do not affect the operating frequency of the processor. The proposed DSP-enhanced processor has been embedded in an SoC for video processing and proven in silicon.
LMI approach to stability of 2D positive systems
Authors: Tadeusz Kaczorek
Venue: Multidimensional Systems and Signal Processing (2009)

The asymptotic stability of positive 2D linear systems with delays (systems of order higher one) described by the Roesser model, the 2D Fornasini---Marchesini models and the general model is addressed. It is shown that the linear matrix inequalities (LMIs) can be used to checking the asymptotic stability of the positive 2D systems. Using LMI approach necessary and sufficient conditions for the asymptotic stability of the positive 2D systems with delays are established. The efficiency of the LMI approach is demonstrated on numerical examples of positive 2D linear systems with delays.
A simulation approach to evaluate the impact of introducing RFID technologies in a three-level supply chain
Authors: Aysegul Sarac, Nabil Absi, Stéphane Dauzère-Pérès
Venue: Proceedings of the 40th Conference on Winter Simulation (2008)

The aim of this paper is to analyze the impacts of RFID technologies on supply chain performances, in particular to evaluate their economical impacts and to conduct ROI (Return-On-Investment) analyses. We simulate a three-level supply chain in which thefts, misplacements and unavailable items for sale cause inventory inaccuracies that decrease the supply chain performance. We compare the effects of different RFID technologies and with different tagging levels for different product types. The main originality of our research is that we are considering that there are various possible RFID systems of different costs and potential profits. The results indicate that different technologies can improve the supply chain performance at different ratios. The economical impacts depend on the chosen technology, the tagging level and the product. Our analyses thus show that the ROI of RFID applications strongly depends on the settings.
The multi-tasking robot control through open architecture systems
Authors: Luige Vladareanu, Mihaela Iliescu, Lucian M. Velea, Daniel Mitroi
Venue: Proceedings of the 8th conference on Systems theory and scientific computation (2008)

This paper shows a new technical solution called OPEN ARCHITECTURE for the contour path robot control on six axis of freedom degrees in system multi-microprocessor with PLC interfaced with PC in order to obtain to obtain high performances. Through the development to of this method the system becomes open to new control functions: compliance and comprehensive actions. The method of computation in real time of the inverse Jacobian matrix, topology of transputers networks and the data flux corresponding to implementation of the multi-microprocessor system for path control of industrial robots is presented. Based on decentralized and distributed structures of programmable automates will result technical methods and solutions of real time control, on six freedom degrees, of industrial robots with high precision, execution speed, flexibility, repeatability, reliability and redundancy.
Weighting Spatial Arrangement of Colors in Content Based Image Retrieval
Authors: S. Berretti, A. Del Bimbo, E. Vicario
Venue: Proceedings of the IEEE International Conference on Multimedia Computing and Systems - Volume 2 (1999)

Content based access to image databases relies on models which permit to abstract images in some space of visual features. A large number of such models addressing features of shape, texture, color, and spatial arrangement have been proposed and experimented. Fusion of multiple features within a single model is now being investigated as a way to increase the effectiveness of retrieval. In particular, integration of color and spatial models is receiving a recent and growing interest.In this paper, we propose a representation which captures the spatial arrangement of the color sets of a picture, without taking into account their distribution in separate non-connected regions. A spatial modeling technique, that we call {\em weighted walkthroughs} is presented, and its suitability to support this representation is motivated and experimented.
Text watermarking by syntactic analysis
Authors: Mi-Young Kim
Venue: Proceedings of the 12th WSEAS international conference on Computers (2008)

This paper explores the method of text watermarking for Korean by syntactic analysis. The proposed method is useful for agglutinative languages - such as Korean, Turkish, etc.-- of which syntactic constituent order is relatively free. Our proposed natural language watermarking method consists of several steps. First, we construct a syntactic dependency tree of input text. Next, we choose target syntactic constituents to move. Then, we embed watermark bits. If the watermark bit does not coincide with the movement bit of the target constituent, we move the syntactic constituent in the syntactic tree. Finally, from the modified syntactic tree, we obtain a marked text. From the experimental results, we show that the coverage of our method is 75%, which outperforms that of previous systems, and the rate of unnatural sentences of marked text is better than that of previous systems. Even if the information-hiding capacity is worse than that of the previous systems, our marked text keeps the same style, and it also has the same information without semantic distortion.
A Weighted Local Sharing Technique for Multimodal Optimisation
Authors: Grant Dick, Peter A. Whigham
Venue: Proceedings of the 7th International Conference on Simulated Evolution and Learning (2008)

Local sharing is a method designed for efficient multimodal optimisation that combines fitness sharing, spatially-structured populations and elitist replacement. In local sharing the bias toward sharing or spatial effect is controlled by the deme (neighbourhood) size. This introduces an undesirable trade-off; to maximise the sharing effect, deme sizes must be large, but the opposite must be true if one wishes to maximise the influence of spatial population structure. This paper introduces a modification to the local sharing method whereby parent selection and fitness sharing operate at two different spatial levels; parent selection is performed within small demes, while the effect of fitness sharing is weighted according to the distances between individuals in the population structure. The proposed method, as tested on several benchmark problems, demonstrates a level of efficiency and parameter robustness that surpasses the basic local sharing method.