ppxscal/embedding_network huggingface dataset:
Proceeding of the ACM first international workshop on Privacy and anonymity for very large databases
Venue: Conference on Information and Knowledge Management (2009)

It is our great pleasure to welcome you to the 1st ACM International Workshop on Privacy and Anonymity for Very Large Datasets -- PAVLAD'09. This first edition of this workshop is intended to start a forum for presentation of research results and experience reports on leading edge issues of privacy for very large data volumes, including new algorithms and techniques, data structures, applications, and theory. The mission of the workshop is to gather researchers in the areas of data privacy and anonymization together with researchers in the area of high performance and very large data volumes management and identify new directions for future research and development. We seek to collect the most recent advances in data privacy and anonymization (i.e. anonymization techniques, statistics disclosure techniques, privacy in social networks, privacy in graphs, etc) and those in High Performance and Data Management (algorithms and structures for efficient data management, parallelism exploitation, distributed systems, etc). PAVLAD gives researchers and practitioners a unique opportunity to share their perspectives with others interested in the various aspects of performance aspects related to privacy issues. The call for papers attracted 14 submissions from 9 different countries in Asia, Europe and the United States. The program committee accepted 8 papers that cover a variety of topics, including privacy and other aspects in network attack and intrusion detection systems, efficient record linkage techniques for privacy preserving support processes, differential privacy for anonymous log access, efficient supervised learning techniques for text anonymization, efficient privacy-preserving algorithms for discovering closed frequent itemsets in distributed environments and for data mining on incremental datasets. In addition, the program includes a keynote speech by Vicenç Torra on error/inconsistency-free microaggregation methods for data anonymization. We hope that these proceedings will serve as a valuable reference for security researchers and developers.
Adaptive frequency hopping for Bluetooth robust to WLAN interference
Authors: Seung-Hwan Lee, Yong-Hwan Lee
Venue: IEEE Communications Letters (2009)

In this letter, we propose a new adaptive frequency hopping (AFH) scheme for Bluetooth to mitigate interference from IEEE 802.11x based wireless local area network (WLAN). To fast classify available channels for the Bluetooth, we first group the Bluetooth channels according to the channel allocation of WLAN and classify groups instead of Bluetooth channels. Then, we employ a moving average technique to estimate the status of Bluetooth channels in groups more accurately. The performance of the proposed scheme is verified by computer simulation. Simulation results show that the proposed AFH scheme significantly outperforms conventional schemes.
Tunable Probing: Towards Timely Channel Selection Mechanism in Dynamic Multi-channel Wireless Networks
Authors: Panlong Yang, Hai Wang, Guihai Chen
Venue: Proceedings of the 2009 Third International Conference on Multimedia and Ubiquitous Engineering (2009)

Optimal spectrum access is a fundamental issue for efficient wireless communications in multi-channel wireless networking systems. Opportunistic spectrum access, making fully use of channels with high quality, could pave a way for efficient transmission. Unfortunately, in heterogeneous wireless networks, these strategies suffer from the assumption of identical wireless channel quality, and the difficulties lie in manipulating between multiple radios and channels. In this paper, we propose a cooperative and cognitive spectrum access algorithm, so as to build a timely and distributed multi-channel probing and access scheme in heterogeneous wireless network. In modeling the probing problem into a time-constrained knapsack problem, we propose an optimal access scheme considering both channel bandwidth and the probing time. Numerical results and simulation results show that, our proposed timely probing paradigm effectively improves network resource utilization with deadlines.
A Java application for quality weighted 3-d interpolation
Authors: Wolfram Rühaak
Venue: Computers Geosciences (2006)

iw3d is a tool for 3-d interpolation of scattered data. The program is endowed with a user-friendly graphical interface. The interpolation-algorithm is a modified version of the inverse-distance weighting method. It has the capability for a quality-weighted interpolation. The interpolation can be carried out with a sector-search approach for reducing clustering effects. A semivariogram is calculated for the three cartesian main directions to give an estimate for a selectable search-distance. Tests of the program with a synthetic 3-d data set and a large set of measured subsurface temperatures with different qualities show good results. iw3d is programmed with Java (TM) and is a GPL licensed open source. It has been successfully tested with different Java versions on Microsoft Windows, Sun Solaris and on several Linux distributions. The current version is available at http://geomath.onlinehome.de/iw3d/.
PowerPoint's power in the classroom: enhancing students' self-efficacy and attitudes
Authors: Joshua E. Susskind
Venue: Computers Education (2005)

The current study examined the effects of non-interactive computer assisted instruction on students' performance, self-efficacy, motivation, and attitudes. Half the lectures presented to two Introduction to Psychology college classes were taught in a traditional lecture format and half were accompanied by PowerPoint multimedia. Lecture order was counterbalanced across classes. Whereas lecture style did not affect academic performance, students had more positive attitudes about the course and greater self-efficacy with PowerPoint. In the class that started with PowerPoint lectures, student motivation declined after PowerPoint stopped accompanying lectures. However, student motivation did not increase after PowerPoint was added in the other class.
Design of irregular LDPC codes for BIAWGN channels with SNR mismatch
Authors: Hamid Saeedi, Amir H. Banihashemi
Venue: IEEE Transactions on Communications (2009)

Belief propagation (BP) algorithm for decoding low-density parity-check (LDPC) codes over a binary input additive white Gaussian noise (BIAWGN) channel requires the knowledge of the signal-to-noise ratio (SNR) at the receiver to achieve its ultimate performance. An erroneous estimation or the absence of a perfect knowledge of the SNR at the decoder is referred to as "SNR mismatch". SNR mismatch can significantly degrade the performance of LDPC codes decoded by the BP algorithm. In this paper, using extrinsic information transfer (EXIT) charts, we design irregular LDPC codes that perform better (have a lower SNR threshold) in the presence of mismatch compared to the conventionally designed irregular LDPC codes that are optimized for zero mismatch. Considering that min-sum (MS) algorithm is the limit of BP with infinite SNR over-estimation, the EXIT functions generated in this work can also be used for the efficient analysis and design of LDPC codes under the MS algorithm.
A Textbook Editor Based on a Customware Service
Authors: Tokuro Matsuo, Dzulqarnain Nasir, Takayuki Fujimoto
Venue: Proceedings of the 2009 International Conference on Network-Based Information Systems (2009)

In recent years, a lot of cooperative document edit systems are proposed and some of them are running as useful system, such as Google documents and Wiki. Although most of them can be utilized as a general use by many sort of people, the features and functions of them are not provided enough in case that specialists achieve a certain purpose. In this paper, as one of enterprise of services, we propose a new textbook/examination edit system developed by Ie-Web framework, called ”Veritas Document”. The service model and system is developed based on customware conception from the framework. The basement of the framework includes Database, AJAX engine, and several other systems in addition to the concept of implementation technique.As an actual system, we propose a new collaborative textbook/examination creation system called the CTWriter system, that works in most server environments provided it is capable of handling PHP documents. As for the client-side functions, this system requires a JavaScript-capable browser since it relies heavily on JavaScript. The system uses Ajax, which is short for Asynchronous JavaScript and XMLHttpRequest, for client-server data interaction. Using Ajax, the data transfers will be seamless as all data transfers and data processing is done in the background and in real-time. Our proposed system includes some features including document edit, figure addition, paragraph change, and several others, that can be customized when the systems are developed.
Multi-pose Face Detection Using Facial Features and AdaBoost Algorithm
Authors: Jinxin Ruan, Junxun Yin
Venue: Proceedings of the 2009 Second International Workshop on Computer Science and Engineering - Volume 02 (2009)

Multi-pose face detection has been one of difficult and hot issues in face detection research nowadays, and urgently need to be solved in practical application. In this paper, a multi-pose face detection algorithm based on facial features and AdaBoost algorithm is introduced. Making full use of facial skin color information firstly, the most background regions can be quickly excluded and the skin color regions can be gotten. After detecting eyes and mouth, the face candidates are segmented according to face orientation decided by the geometric features of the eyes and mouth regions. At last, the face candidates are verified by AdaBoost algorithm. The experimental results demonstrate that the algorithm can further improve the multi-pose face detection accuracy and is highly robust to facial expression and occlusion.
Use translation programs after entering handwriting into computers with a digital pen
Authors: Marie J. Myers
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

In the present article we discuss the special use of a digital pen for transposing handwriting into computer printed text through a conversion to make it available for processing into other languages through translation software. Conversion software allows for quick access of initially hand-scribbled notes and texts in diverse languages into computer printed text for further applications. We analyzed samples to show emerging characteristics of the conversion of handwriting into printed text and proposed modifications to the program as well as recommendations for the writer in light of the impact it could have on a subsequent translation application.
e-learning content development in Indonesia: an initiative
Authors: Paulina Pannen
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

ICT in education is perceived as strategic tools to bridge the disparity of quality education across geographical areas in Indonesia, and to support the growth of knowledge-based Indonesian society with competitiveness towards globalization. The promises offered by the use of ICT in education have driven the Government of Indonesia, especially Directorate General of Higher Education, to engage in establishing the higher education network. The first network set up with the assistance of the World Bank was Global Development Learning Network. Under the GDLN project, e-learning content development was initiated. This paper focuses on efforts of e-learning content development under the GDLN Project, especially on the design process. It discusses the pedagogical consideration, design consideration, and results of the design process.
Implementation of an educational web portal to enhance faculty collaboration and document sharing
Authors: Carlos A. Ortiz, Eliel Melon
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

Today the Internet has provided great opportunities for enterprise integration among internal departments, external partners and other service providers. Web services systems have recently found their way into many applications such as e-commerce, corporate portals and e-learning. Construction of new services or introducing new functions to existing services requires an evaluation of every organization needs. Current approaches to portal composition often require major programming effort; this is time consuming and requires considerable developer expertise. The selection of a web portal platform and it implementation should be seen as a process of building an infrastructure and foundation for the future. The current market of portal products goes from licenses products to open-source alternatives. In this paper, we explore and identify the requirements for a basic portal framework in the design, implementation and deployment of an Educational Web Portal Service at the School of Health Professions (SHP), University of Puerto Rico. We also discuss the benefits of this platform and some of the tools provided by the portal environment to fulfill the organization needs and the lessons learned during the architecture design and software implementation.
A model for the interconnection and the competition among hosting and virtual network operators
Authors: Livio Cricelli, Michele Grimaldi, Nathan Levialdi
Venue: Proceedings of the IASTED Asian Conference on Modelling and Simulation (2007)

In the mobile telecommunication sector, the growing competitiveness has increased the complexity of the business interactions among Mobile Network Operators (MNOs). The situation has become even more difficult at the increase of the number of players and, above all, at the entry of a new kind of operators, the Mobile Virtual Network Operators (MVNOs). This paper analyzes the relationship among Hosting Network Operators (HNOs), MNOs, and MVNOs in the mobile telecommunications industry. A model has been defined to analyze the strategic consequences of the different typologies of interconnection among operators. With reference to the Italian mobile industry, different scenarios have been envisaged to observe effects when a MVNO compete with differently sized operators and when it is interconnected with the incumbent or with the follower operator. The analysis of the results obtained by the model has been focused on retail price strategies, on market shares erosion, and on profit allotment.
Creating Complex, Adaptable Management Strategies via the Opportunistic Integration of Decentralised Management Resources
Authors: Yoann Maurel, Ada Diaconescu, Philippe Lalanda
Venue: Proceedings of the 2009 International Conference on Adaptive and Intelligent Systems (2009)

The ambitious goals of autonomic management require complex, adaptable processing capabilities that prove extremely difficult to conceive and implement. This paper proposes a solution for the opportunistic integration of specialised autonomic management resources, so as to obtain complex, adaptable management strategies. The paper introduces an architecture that follows the proposed solution and provides a reusable framework that implements this architecture. The solution's validity is indicated by experimental results obtained by testing the framework prototype on a sample home security application.
A simple adaptive optimization scheme for IEEE 802.11 with differentiated channel access
Authors: Jianbing Mao, Yuming Mao, Supeng Leng, Xiang Bai
Venue: IEEE Communications Letters (2009)

This letter proposes an adaptive scheme to optimize the system throughput of IEEE 802.11 with differentiated channel access ability. Due to the difficulty of estimating the number of active stations and that approaches based on the estimation may not converge reported in previous research, the proposed scheme is developed to maximize the system throughput without the requirement of station number information while providing service differentiation among different traffic classes. Specially, the scheme is simple to implement and it only requires to measure the time the channel is in idle and collision states separately. Performance evaluation results show that the scheme is effective in achieving near to the theoretical maximum system throughput.
Reed-Solomon codes implementing a coded single-carrier with cyclic prefix scheme
Authors: Geert Van Meerbergen, Marc Moonen, Hugo De Man
Venue: IEEE Transactions on Communications (2009)

This paper presents a novel Reed-Solomon codes based transmission scheme called RS-SC-CP. While RS-SC-CP is essentially a Reed-Solomon (RS) coded single carrier with cyclic prefix (SC-CP) system, a filter bank representation of the RS code is used. This filter bank representation unveils a DFT synthesis bank, just as in a traditional Orthogonal Frequency Division Multiplexing (OFDM) system (allbeit in a finite field). Therefore, RS-SC-CP is topologically equivalent with OFDM. As such, the RS-SC-CP system inherits the advantages of an SC-CP system over a traditional OFDM system like a low Peak to Average Power Ratio (PAPR). But, more importantly, it allows us to use a novel equalization technique that resembles a traditional OFDM equalizer. The equalizer of an RS-SC-CP receiver is split into two stages: the first stage encompasses a partial equalization in the complex field, which ensures that the residual channel response has integer coefficients. It is calculated using a Minimum Mean Square Error (MMSE) criterion. The residual ISI is removed by a Galois field equalizer in the second stage, posterior to the RS decoding removing the noise. Finally, the performance of the RS-SC-CP system is further evaluated by simulations showing the performance gain of the RS-SC-CP system compared to a traditional coded OFDM or Single Carrier with Cyclic Prefix (SC-CP) scheme.
A scalable hybrid overlay multicast scheme for IPTV receivers in subnet dense mode
Authors: Dongk-Kyun Kim, Joo-Bum Kim, Won-Hyeak Lee, Ki-Sung Yu
Venue: Proceedings of the IASTED International Conference on Communication Systems, Networks, and Applications (2007)

Currently IPTV services are rapidly being deployed, and scalable multicasting is required for the need of IPTV services, e.g. robustness, security, and QoS. While native IP multicast is considered a good solution for IPTV services, variety of overlay multicast mechanisms have been suggested to remove the barriers that block deployment of IP multicast on Internet. However, most of overlay multicast mechanisms do not consider host group model, which is not a problematic portion, but advantageous feature of traditional IP multicast in terms of scalability, robustness, and security. Thus, overlay multicast based only on end-hosts may suffer inefficiency such as long data transmission delay, large stress and stretch, which may result in lack of QoS required by IPTV receivers. In this paper, we propose a hybrid scheme to take advantages of both IP multicast and overlay multicast, based on two principle design factors. By adopting host group model and topology awareness, our scheme can inherently acquire network topology information used to get rid of inefficiency of application level routing, and to gain additional efficiency for many group members on subnet dense mode. Overall network performance enhancement is shown in the performance analysis of our scheme, regarding low latency, small stress, and optimal stretch for IPTV receivers in subnet dense mode.
Simulation of current circulations in the Gulf of Thailand
Authors: N. Aschariyaphotha, P. Wongwises, S. Wongwises, U. W. Humphries
Venue: Proceedings of the IASTED Asian Conference on Modelling and Simulation (2007)

In this research the Princeton Ocean Model (POM) is used to study the current circulations in the Gulf of Thailand (GoT), covering the domain 6&deg;N to 14&deg;N latitudes and 99&deg;E to 105&deg;E longitudes. The model has an orthogonal curvilinear grid in the horizontal with variable spacing from 2 km near the head of the GoT to 55 km at the eastern boundary, with 10 sigma levels in the vertical conforming to realistic bottom topography. The model run is executed using wind stress calculated from climatological monthly mean wind, restoring-type surface heat and salt, and climatological monthly mean freshwater flux data. It is initialized by the temperature and salinity data from Levitus94 data set, with zero velocity. Force at the lateral boundary is prescribed from You's results (IAP-model) and the radiation condition. The model domain has two open boundaries, i.e. eastern boundary and southern boundary. The northern boundary and western boundary are closed by land. The simulations show that the strong circulations are clockwise during summer and rainy seasons of Thailand, which are in the northeast and southwest monsoon periods respectively. They occur near Pattani and Narathiwat provinces during summer and in the central GoT during the rainy seasons.
Real-Time Operating Systems for Small Microcontrollers
Authors: Tran Nguyen Bao Anh, Su-Lim Tan
Venue: IEEE Micro (2009)

Real-time operating systems have gained popularity in microcontroller- and processor-based embedded system design. This article discusses differences between RTOSs and generic operating systems, the advantages and disadvantages of using RTOSs for small microcontroller system development, and the benchmarking methods used for RTOSs. Benchmarking results for four RTOSs show no clear winner, with each RTOS performing better on some criteria than others.
A generalized methodology for bit-error-rate prediction in correlation-based communication schemes using chaos
Authors: Georges Kaddoum, Pascal Chargé, Daniel Roviras
Venue: IEEE Communications Letters (2009)

The aim of this paper is to present a new and accurate approach to compute the bit-error-rate (BER) performance of coherent and non-coherent chaos-based communication systems. The approach explores the dynamical properties of chaotic sequences and takes into account that the bit energy is varying from one transmitted bit to another. Compared with other widely used approaches in the literature, the proposed methodology gives accurate results even for low spreading factors.
Tabu search procedures for the cell formation problem with intra-cell transfer costs as a function of cell size
Authors: Jeffrey Schaller
Venue: Computers and Industrial Engineering (2005)

This paper compares four procedures that generate heuristic solutions for a cell formation integer programming model. The objective of the model is to minimize cost. The cost elements included in the model are: cost of intra-cell and inter-cell moves, and the cost of the equipment used in the cells. The cost of an intra-cell move is based on the size of the cell in terms of the number of machines included in the cell. The procedures were tested on 19 problems obtained from the literature. The results show that a previous method developed by Sankaran and Kasilingam (1993) is very efficient but generates poor solutions. A tabu search procedure that starts with the solution generated by the Sankaran and Kasilingam procedure significantly improved the solutions. A second tabu search procedure that uses a new method of developing an initial solution also generated better solutions than the Sankaran and Kasilingam procedure and on the larger sized problems generated the best solutions.