ppxscal/embedding_network huggingface dataset:
Towards Holistic Approach for Business Informatics --Oriented Skills Formation in the Knowledge Economy
Authors: Aurelian Stănescu, Ioan Dumitrache, Markus Helfert, Howard Duncan, Adriana Mircea, Dan Gârlaşu, Mihnea Moisescu
Venue: Proceeding of the 2006 conference on Leading the Web in Concurrent Engineering: Next Generation Concurrent Engineering (2006)

The author's goal within the present paper is to conceptualize the skills formation process for the high priority multidisciplinary domain of business informatics. A holistic approach for efficient synchronization between the Life Long Learning paradigm and learning organization concept involves in progressive educational stages as a set of common activities performed with the aim to assist national education system in meeting the going demand for knowledge workers of today's global economy. The big challenge with public education system is that the young graduates need a fairly long period (12--24 month) to take up and become fully productive in real-life working environment. The other major issue is that resources are scared anyway and the increasing demands of skilled workforce may be compensated by the deep cooperation between the public education system and a corporate (or a consortium) program. A clustering program, developed by University POLITEHNICA Bucharest and, respectively Oracle Romania is chosen as a case stud. Also, the “BIN-Net” Socrates Erasmus program for master joint degree in common Europe will be presented briefly (http://www.dke.univie.ac.at/binnet).
On Goldbach conjecture
Authors: Manuel Meireles
Venue: Proceedings of the 13th WSEAS international conference on Applied mathematics (2008)

The objective of the present work is to present an approach for a solution of Goldbach Conjecture. For such the method of the contradiction was adopted, breaking of the hypothesis that there is, at least, an equal number that is not the sum of two prime numbers. The premise that sustains the demonstration is the following: a prime number, which has the properties of the Theorem of Wilson, can be represented by the floor function. In applied mathematics it can be useful to know that he/she/it can assure the condition of a number as being prime number, using the floor function.
User Stereotypes for Student Modelling in Collaborative Learning: Adaptive Advice to Trainers
Authors: Kalliopi Tourtoglou, Maria Virvou
Venue: Proceeding of the 2008 conference on Knowledge-Based Software Engineering: Proceedings of the Eighth Joint Conference on Knowledge-Based Software Engineering (2008)

Software engineering usually involves the collaboration of team members in a team. One important issue of project leaders or software engineering trainers is to form teams that will collaborate efficiently. In view of this, in this paper we describe how we have adapted the stereotype-based theory for building individual user models in a collaborative learning environment in order to provide intelligent help to trainers of UML. In this work, we describe the user characteristics included in the user models and the type of advice offered to the human trainer of the system. The user characteristics are related not only to the knowledge state of the users, but also to their personality and performance types. The advice concerns the most effective organization of the users into groups taking into consideration their level of expertise, their personality characteristics and their performance types. Furthermore, we present an empirical study among experienced trainers on the combinations of stereotypes that are considered to be the most appropriate matching of the users.
Investigating suitability for server virtualization using business application benchmarks
Authors: Tsuyoshi Tanaka, Toshiaki Tarui, Ken Naono
Venue: Proceedings of the 3rd international workshop on Virtualization technologies in distributed computing (2009)

Server virtualization is now required for data center systems to reduce the number of servers. However, it is still unclear which business applications are suitable for virtualization. We present our evaluation results for four types of business application benchmarks on our virtualization system. The results show that the virtualization performance of a TPC-H workload, which mainly executes referencing on a database, uses about 90% of the non-virtualized performance, and that the virtualization performance of the TPC-H workload is better than that of the other benchmark applications. The results of a new performance characteristic for virtualization indicated that application programs, which have performance bottlenecks in disk I/Os and low CPU utilizations in a non-virtualized environment, are suitable for virtualization.
Modeling stochasticity and robustness in gene regulatory networks
Authors: Abhishek Garg, Kartik Mohanram, Alessandro Di Cara, Giovanni De Micheli, Ioannis Xenarios
Venue: Bioinformatics (2009)

Motivation: Understanding gene regulation in biological processes and modeling the robustness of underlying regulatory networks is an important problem that is currently being addressed by computational systems biologists. Lately, there has been a renewed interest in Boolean modeling techniques for gene regulatory networks (GRNs). However, due to their deterministic nature, it is often difficult to identify whether these modeling approaches are robust to the addition of stochastic noise that is widespread in gene regulatory processes. Stochasticity in Boolean models of GRNs has been addressed relatively sparingly in the past, mainly by flipping the expression of genes between different expression levels with a predefined probability. This stochasticity in nodes (SIN) model leads to over representation of noise in GRNs and hence non-correspondence with biological observations. Results: In this article, we introduce the stochasticity in functions (SIF) model for simulating stochasticity in Boolean models of GRNs. By providing biological motivation behind the use of the SIF model and applying it to the T-helper and T-cell activation networks, we show that the SIF model provides more biologically robust results than the existing SIN model of stochasticity in GRNs. Availability: Algorithms are made available under our Boolean modeling toolbox, GenYsis. The software binaries can be downloaded from http://si2.epfl.ch/~garg/genysis.html. Contact: abhishek.garg@epfl.ch
Optimizing i/o-intensive transactions in highly interactive applications
Authors: Mohamed A. Sharaf, Panos K. Chrysanthis, Alexandros Labrinidis, Cristiana Amza
Venue: Proceedings of the 35th SIGMOD international conference on Management of data (2009)

The performance provided by an interactive online database system is typically measured in terms of meeting certain pre-specified Service Level Agreements (SLAs), with expected transaction latency being the most commonly used type of SLA. This form of SLA acts as a soft deadline for each transaction, and user satisfaction can be measured in terms of minimizing tardiness, that is, the deviation from SLA. This objective is further complicated for I/O-intensive transactions, where the storage system becomes the performance bottleneck. Moreover, common I/O scheduling policies employed by the Operating System with a goal of improving I/O throughput or average latency may run counter to optimizing per-transaction performance since the Operating System is typically oblivious to the application high-level SLA specifications. In this paper, we propose a new SLA-aware policy for scheduling I/O requests of database transactions. Our proposed policy synergistically combines novel deadline-aware scheduling policies for database transactions with features of Operating System scheduling policies designed for improving I/O throughput. This enables our proposed policy to dynamically adapt to workload and consistently provide the best performance.
A burst assembly algorithm for traffic smoothing in high speed networks
Authors: Radu Dobrescu, Daniela Hossu, Stefan Mocanu, Maximilian Nicolae
Venue: Proceedings of the 10th WSEAS international conference on Mathematical and computational methods in science and engineering (2008)

In this paper is addressed the issue how to provide QoS control and improve performance in high speed Optical Burst Switching (OBS) networks. In order to provide better proportional differentiated services is proposed a novel burst assembly algorithm (named adaptive timer-based) with traffic shaping functions to reduce the variance of assembled traffic and improve the burst loss performance. Next is presented a precise analytical model to study the performance of the assembled traffic in high speed networks. The simulation results show that the adaptive timer-based assembly algorithm has better performance in terms of edge buffering delay and can lighten burst loss ratio for TCP flows of the OBS network.
A machine learning approach for posture recognition based on simplified shock graph
Authors: Nooritawati Md Tahir, Aini Hussain, Salina Abdul Samad, Hafizah Husain
Venue: Proceedings of the 3rd WSEAS international symposium on Wavelets theory and applications in applied mathematics, signal processing & modern science (2009)

In this paper, posture classification using Simplified Shock Graph as feature vectors based on two machine learning techniques namely Artificial Neural Network along with Support Vector Machine are investigated. Initial results showed that both classifiers are able to classify the four main postures with high recognition rate. Moreover, the tremendous performance of Support Vector Machine (SVM) as classifier is confirmed based on the Kappa Score calculated. Initial findings have proven that SSG is apt as feature vectors for posture recognition whilst ANN and SVM were apposite to perform the classification task.
Designing a wireless sensor system for continuous monitoring of the cervical dilation of a pregnant woman
Authors: Pramode Verma, Anjan K. Ghosh, Robert C. Huck, Samuel Cheng, Shanshan Chen, Mark Martens, Anil Kaul
Venue: International Journal of Advanced Media and Communication (2009)

A novel electronic sensor system is designed to continuously monitor the dilation of the cervix of a pregnant female approaching labour and delivery. The system is capable of wirelessly transmitting the progress of dilation to a central monitoring agency that can get in touch with the attending physician and&#47;or the hospital of the pregnant female. Using wireless telephony, the monitoring agency and&#47;or the physician can advise the female about the medical care she needs at that moment, even though the female might be at her home or away from home, and away from the medical facility. This is an expanded version of a paper presented at the 3rd IEEE International Workshop on Medical Measurements and Applications, 9 10 May 2008, Ottawa, ON, Canada.
Application of multitemporal Landsat data to monitor land cover changes in the Eastern Nile Delta region, Egypt
Authors: Abdulaziz M. Abdulaziz, Jose M. Hurtado,  J., Raed Al-Douri
Venue: International Journal of Remote Sensing (2009)

Due to the progressive increase in development of desert land in Egypt, the demand for efficient and accurate land cover change information is increasing. In this study, we apply the methodology of post-classification change detection to map and monitor land cover change patterns related to agricultural development and urban expansion in the desert fringes of the Eastern Nile Delta region. Using a hybrid classification approach, we employ multitemporal Landsat Thematic Mapper (TM)/Enhanced Thematic Mapper Plus (ETM+) images from 1984, 1990 and 2003 to produce three land cover/land-use maps. Post-classification comparison of these maps was used to obtain 'from-to' statistics and change detection maps. The change detection results show that agricultural development increased by 14% through the study period. The average annual rate of land reclamation during 1990-2003 (4511 ha a-1) was comparable to that during 1984-1990 (4644 ha a-1), reflecting a systematic national plan for desert reclamation that went into effect. We find that the increase in urbanization (by ca 21 300 ha) during 1990-2003 was predominantly due to encroachment into traditionally cultivated land at the fringes of urban centres. Our results accurately quantify the land cover changes and delineate their spatial patterns, demonstrating the utility of Landsat data in analysing landscape dynamics over time. Such information is critical for making efficient and sustainable policies for resource management.
Applying Usability Patterns in e-Commerce Applications
Authors: Francisco Montero, Víctor López-Jaquero, José Pascual Molina
Venue: Proceeding of the 2008 conference on Techniques and Applications for Mobile Commerce: Proceedings of TAMoCo 2008 (2008)

The exigencies and the particular characteristics of website development are a great challenge for designers and developers. There are many differences between typical software application development and website development. In website development, the presentation component; visual and graphical, plays an important role, which is not that important for not web applications. This component can be documented by using patterns, and particularly usability patterns. Traditionally, guidelines have been used to deal with it. These patterns should be written so that they can be used by users, designers and developers. Thus, users will be able to make proposals, user interface designers will be able to imagine and developers will be able to build the application.
Medial axis lookup table and test neighborhood computation for 3D chamfer norms
Authors: Nicolas Normand, Pierre Evenou
Venue: Pattern Recognition (2009)

Chamfer distances are discrete distances based on the propagation of local distances, or weights, defined in a mask. The medial axis, i.e. the centers of maximal balls (balls which are not contained in any other ball), is a powerful tool for shape representation and analysis. The extraction of maximal disks is performed in the general case by testing the inclusion of a ball in a local neighborhood with covering relations usually represented by lookup tables. The proposed method determines if a mask induces a norm and in this case, computes the lookup tables and the test neighborhood based on geometric properties of the balls of chamfer norms, represented as H-polytopes. The method does not need to repeatedly scan the image space, and improves the computation time of both the test neighborhood detection and the lookup table computation.
The effects of the ubiquitious computing environment on student achievement and teacher perceptions
Authors: Ning Wang
Venue:  (2008)

The purpose of this study was to investigate the effects of the ubiquitous one-to-one laptop learning environment and its impact on two areas: (1) standardized achievement test scores, and (2) teacher perspectives on pedagogy. This research studied computer technology in the middle school environment that is beyond the traditional computer laboratory or mobile laptop laboratory. Advancements in computer technology, in the form of affordable, personal computing devices, have changed societal communication and information sharing. This study compares two similar middle schools over a three year period. One of the middle schools provides each eighth grade student and teacher a laptop computer: meaning twenty-four hours a day, seven days a week access. The study was guided by three research questions: (1) Will the one-to-one ubiquitous computing environment impact student achievement? (2) Will the one-to-one ubiquitous computing environment have a differentiated impact on student achievement by gender and academic program? (3) Will the one-to-one laptop computing learning environment have a perceived effect on the delivery of instructional services? This study hypothesized that the one-to-one ubiquitous computing intervention would have a generalizable effect on the learning environment, thus impacting both teacher and student behaviors. The study hypothesized that because of the intervention, teachers would direct instructional services differently and student outcomes will improve. This study was critical not only to the experimental district, but to any districts researching the possibility of funding a one-to-one computing platform. This study quantified the effects the laptop program had on student achievement and teacher instructional practice in the ubiquitous computing environment. Providing a laptop computer to students, at no cost to the student, was widely supported by parents and teachers. Boards of education may hold that the laptop program bridges the digital divide between students&mdash;&ldquo;haves&rdquo; and &ldquo;have-nots&rdquo;. Consequently, laptop programs have become highly politicized and controversial. This study produced outcomes based on two-way ANOVA, t-test, and Chi-square analyses of a teacher survey and student performance on the New Jersey Grade Eight Proficiency Assessment. The study concludes that the ubiquitous laptop learning environment affected the delivery of instruction services, but did not effect student achievement as measured by the GEPA.
Chaos and Graphics: Gradient field based inhomogeneous volumetric mesh deformation for maxillofacial surgery simulation
Authors: Sheng-hui Liao, Ruo-feng Tong, Jin-xiang Dong, Fu-dong Zhu
Venue: Computers and Graphics (2009)

This paper presents a novel inhomogeneous volumetric mesh deformation approach by gradient field manipulation, and uses it for maxillofacial surgery simulation. The study is inspired by the state-of-the-art surface deformation techniques based on differential representations. Working in the volumetric domain instead of on only the surface can preserve the volumetric details much better, avoid local self-intersections, and achieve better deformation propagation because of the internal mesh connections. By integrating the mesh cell material stiffness parameter into our new discrete volumetric Laplacian operator, it is very convenient to incorporate inhomogeneous materials into the deformation framework. In addition, the system matrix for solving the volumetric harmonic field to handle the local transformation problem is the same used for Poisson reconstruction equation, thus it requires solving essentially only one global linear system. The system is easy to use, and can accept explicit rotational constraints, or only translational constraints to drive the deformation. One typical maxillofacial surgery case was simulated by the new methodology with inhomogeneous material estimated directly from CT data, and compared to the commonly used finite element method (FEM) approach. The results demonstrated that the deformation methodology achieved good accuracy, as well as interactive performance. Therefore, the usage of our volumetric mesh deformation approach is relevant and suitable for daily clinical practice.
Staffing to Maximize Profit for Call Centers with Alternate Service-Level Agreements
Authors: Opher Baron, Joseph Milner
Venue: Operations Research (2009)

To ensure quality from outsourced call centers, firms sign service-level agreements (SLAs). These define service measures such as what constitutes an acceptable delay or an acceptable abandonment rate. They may also dictate penalties for failing to meet agreed-upon targets. We introduce a period-based SLA that measures performance over a short duration such as a rush hour. We compare it to alternate SLAs that measure service by individual and over a long horizon. To measure the service levels for these SLAs, we develop several approximations. We approximate the probability an acceptable delay is met by generalizing the heavy-traffic quality and efficiency driven regime. We also provide a new approximation for the abandonment rate. Further, we prove a central limit theorem for the probability of meeting a service level measured by the percentage of customers acceptably served during a period. We demonstrate how an outsourced call center operating in an environment with uncertain demand and abandonment can determine its staffing policy to maximize the expected profit for these SLAs. Numerical experiments demonstrate a high degree of accuracy for the approximations and the resulting staffing levels. We indicate several salient features of the behavior of the period-based SLA.
Context management in mobile environments: a semantic approach
Authors: Alejandro Cadenas, Carlos Ruiz, Iker Larizgoitia, Raúl García-Castro, Carlos Lamsfus, Iñaki Vázquez, Marta González, David Martín, María Poveda
Venue: Proceedings of the 1st Workshop on Context, Information and Ontologies (2009)

This paper presents a first draft of a context management model and architecture in the scope of mobile end-user services, paying special attention to mobile scenarios and specific mobility environments. The paper describes our notion of context and presents the process followed for developing the ontologies for representing context, providing an overview of the first version of these ontologies. Besides, we propose an architecture for managing context in mobile environments, including high-level descriptions of the components that compose it, as well as some low level details regarding the contextual interfaces involved. To show the way all these components interoperate and the advantages of the defined architecture and semantic model, we describe a use case with specific implementation details.
The Definitive Guide to Lift: A Scala-based Web Framework
Authors: Derek Chen-Becker, Tyler Weir, Marius Danciu
Venue:  (2009)

Apress's firstPress series is your source for understanding cutting-edge and emerging technology. Short, highly focused, and written by experts, firstPress books save you time and effort. They contain the information you could get based on intensive research yourself or if you were to attend a conference every other weekif only you had the time. They cover the concepts and techniques that will keep you ahead of the technology curve. firstPress books are real books, in your choice of electronic or print-on-demand format, with no rough edges even when the technology itself is still rough. You can't afford to be without them! The Definitive Guide to Lift will educate you about Lift, a great framework for building compelling web applications. Lift is designed to make powerful techniques easily accessible, while keeping the overall framework simple and flexible. Lift makes it fun to develop because it lets you focus on the interesting parts of coding. By the end of this book, you'll be able to create and extend any web application you can think of. What you'll learn Explore Lift, the Scala-based web framework and its fundamentals, forms, SiteMap, and more Walk through the PocketChange demo application Use the Mapper and Record Frameworks Use and integrate Lift with JavaScript, Ajax, and COMET Create Lift widgets Persist with Lift using JPAs (Java Persistence APIs) Use Lift's tagging support and web services Use Scala actors, third-party integrators, and more Who is this book for? This book is for Java web developers looking for something simpler by way of functional programming like Scala and its web framework, Lift. This book is also for Rails/Django web developers looking for something more scalable.
Video Fingerprinting by Using Boosted Features
Authors: Huicheng Lian, Jing Xu
Venue: Proceedings of the 6th International Symposium on Neural Networks: Advances in Neural Networks - Part III (2009)

In this paper, we present a novel approach for video fingerprinting by using boosted Harr-like features and direct hashing. Through employing a pairwise boosting method on a large set of features, our system can learn the top-M discriminative filters that are enable to efficient extracting video fingerprints. During query phase, we retrieve video clips by using a fast and accurate direct hashing, which minimizes perceptual Hamming distance between queries and a large database of pre-computed fingerprints. To demonstrate the superiority of our method, we also implement four other fingerprinting methods for comparisons. The experimental results indicate that our proposed method can significantly outperform those four methods in video retrieval.