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A diverse body of international students, mainly exchange students, has come to Wakayama University, and efforts are underway to meet the various needs of these students in learning Japanese. However, the Covid-19 pandemic has created unanticipated challenges for Japanese language education. These circumstances require more than ever a robust exchange of information and cooperation among partner universities. In order to share information and discussion on issues related to Japanese language education among the Asian universities from which many of Wakayama University's international students come, an international symposium entitled “Japanese Language Education in Asia --Current Situation and Issues--” was held. Panelists from four Asian universities in China, Vietnam, Indonesia and Uzbekistan as well as Wakayama University delivered reports and engaged in a discussion of issues. On the day of the symposium, a total of 196 people from 17 countries around the world participated with many contributing comments to the discussion. n this paper, while looking back on the purpose and contents of the symposium, we will consider the current state of Japanese language education (with an emphasis on Asia), further cooperation in the future, and new possibilities such as COIL.

The current proceedings incorporate the research results presented at the 8th Virtual International Spring Symposium held at Alecu Russo Bălți State University. The contributions focus on current issues concerning language education in the 21st century., "Language education the 21st century: perspectives, paradigms, practices", virtual international spring symposium (8 ; 2022 ; Bălţi). VIII Virtual International Spring Symposium Proceedings "Language education the 21st century: perspectives, paradigms, practices", 18-19 March 2022, Bălţi / edited by: Silvia Bogdan, Dina Puiu ; scientific committee: Valentina Priţcan (Bălţi), Anca Cehan (Iaşi) [et al.] ; organizing committee: Silvia Bogdan (coordinator) [et al.]. – Bălţi : S. n., 2022 (Tipografia din Bălţi). – 216 p. : fig., fot., tab. Antetit.: Alecu Russo Bălţi State Univ., Fac. of Philology, Engl. and German Philology Dep. [et al.] – Texte : lb. rom., engl., fr., germ. – Rez.: lb. rom., engl., fr. – Referinţe bibliogr. la sfârşitul art. – ISBN 978-9975-161-17-6.

The present study reported the provision of information accessibility for people with hearing and visual impairments with the aim of allowing them to assume the role of speaker, chairperson or discussant, at a small-scale international symposium where both Japanese and English are used. First, both sign language interpretation and remote Communication Access Realtime Translation（CART）services, which display spoken words on a screen, were used for Japanese language users with hearing impairments. An English version of CART was shown on tablet PC for English language user with hearing impairments. The information accessibility for Japanese users with hearing impairments was generally satisfactory from preliminary discussions and arrangments made in advance with people involved, while there was limited preliminary discussion with English users with hearing impairments. Second, examples were presented for assisting information accessibility and mobility for both Japanese and English users with visual impairments, to asuume the role of a chairperson after preliminary discussions. This study concluded that having separate roles for people coordinating ways to accommodate those with hearing or visual impairments was key to smoothly running the international symposium. In the future, remote CART sevices, both domestic and abroad will be considered for English users with hearing impairments.

目 的：モンゴル国のリハビリテーションの発展に貢献することを目指し，Skypeを活用して開催した国際シンポジウムの評価を分析し，教育支援の課題について示唆を得ることである．方 法：国際シンポジウムは，モンゴル国と群馬大学の交流の経緯・遠隔教育に関する講演と集団討議により構成し，その両方でSkypeを用いた．アンケートにより対象者の属性，国際シンポジウムとSkype活用の有益性，感想等を調査した．結 果：研究対象者は教員，保健医療人材，学生であった．国際シンポジウム・Skypeの活用を有益と答えた人は8割以上で，対象者の属性による回答の偏りは無かった．感想は交流の経緯の理解，発展への期待，遠隔教育の可能性等に分類された．結 論：Skypeを活用した国際シンポジウムは，モンゴル国におけるリハビリテーションの専門職を育成する教育支援に有益であると考えられ，モンゴル国のリハビリテーションの発展に貢献する可能性があることが示唆された．

Time is running relentlessly fast. The Fourth International Symposium was held on June 21-22 this year. The topic of the Symposium was “Science and technology education: Developing a global perspective”. More than 60 scientists from 18 countries participated in the symposium. Comparing with the symposium which took place in 2019, the geographical distribution of the participants is wide and diverse. Ukrainian, Serbian, Moldavian, Malaysian, Latvian, Slovak etc. researchers participated in the symposium. Another important feature of the symposium is that it was held remotely/online due to the ongoing Covid-19 pandemic. One of this international symposium ideas is – to show that Baltic region countries also actively participate in natural science and technology education research, especially in STEAM context. The second idea is that Baltic countries as well as other small regions of the world need corresponding close communication and cooperation. During this symposium, these two essential ideas were developed and supported. The symposium was organised by scientific methodological centre “Scientia Educologica”, the associated member of Lithuanian Scientific Society. The main symposium partner was Publishing House Scientia Socialis, Ltd. It is significant that even in the conditions of a pandemic, the symposium was properly organized.

元データの著者名に誤りがあったため正しい表記を著者別名として追加

In this paper we present the organisation and execution of the 11th International Symposium on Organisational Science Development, entitled Management and Social Responsibility, which is organised by the Faculty of Organisational Sciences in Belgrade. The Symposium is already a traditional event and it has taken place in Zlatibor for many years, but this year it was held in Belgrade itself in order to celebrate the 200th anniversary of the University of Belgrade. The fact that more than 450 authors and co-authors, coming from Serbia, Bosnia and Herzegovina, the Czech Republic, Montenegro, Croatia, Israel, Macedonia, Germany, Slovakia, Slovenia, the USA, et al., attended the symposium clearly confirms the topicality of conference’s contents in all areas of management, for example in the area of product and service development, finances, quality, informatics, human resources and many others.

Aims To determine if on-going modification of an international teaching course in emergency medicine will improve audience perception and receptivity. Methods Over 4 years, we conducted surveys during emergency medicine symposiums given in Ghana, West Africa. In 2003, 2004 and 2006, symposium interventions of content modification (lecture topics/workshops), audience modification (smaller groups, designing workshops for different levels of providers) and in-process modification (modification of lecture technique in two sequential 2006 symposiums) were done. Survey responses were analyzed to determine what interventions resulted in greater participant satisfaction. When comparing the three groups, a one-way ANOVA test was conducted to determine differences among the 3 years. When comparing two groups, Levene’s test for equality of variances was conducted for annual variance, and based on that result, an independent t-test was calculated. Results The one-way ANOVA test indicated that there was a statistically significant difference among the three groups (2003, 2004, 2006) of symposium participants in four questions related to the participants’ perception of the instructors. The independent t-test comparing the aggregate data of 2003 and 2004 with 2006 (audience modification and in-process modification between two sequential symposiums) showed a statistically significant improvement in the participants’ receptivity. The data indicated that modifying the content of international symposiums and modifying the audience to which it is addressed are equally valuable tools to ensure a positive participant receptivity. Moreover, the data indicated that “in-process” modification conducted between the two sequential 2006 symposiums produced a statistically significant increase in positive perception, facilitating knowledge transfer. Conclusion Statistical analysis of surveys coupled with modification and intervention can improve participant satisfaction in international teaching programs.

The earliest attempt of seismic characterization of the subsurface using controlled sources date from the mid 1800’s[Mallet, 1852]. This initial experiment, carried out in Ireland, was followed by increasing efforts in the development of the theory of seismic wave propagation through heterogeneous media. In the early 1900’s, the discovery by Andija Mohorovićić(1857-1936) of the seismic velocity discontinuity that bears his name ( Mohorovićic, 1910), interpreted to represent the Crust-Mantle boundary, and the success achieved by controlled-source seismic techniques in hydrocarbon exploration, together represented a turning point in the development of seismic imaging methods. In the ensuing decades, the methods began to be used by the academia to place constraints on the subsurface structure and properties of the Earth's crust, and to explore the inner architecture of geological structures such as orogens, continental margins, and ocean basins. The seismic techniques, in particular the common-mid-point (CMP) imaging, were applied to the characterization of the crystalline crust (Meissner,1967, and Clowes et al., 1968), triggering a rapid development of the normal-incidence deep seismic reflection method for the determination of crustal structure.The Deep Seismix symposium series started at Cornell University in 1984 (Barazangi and Brown, 1986a, 1986b). The aim of that first symposium was to foster discussion and collaboration between researchers working on seismic reflection imaging techniques and to demonstrate the potential of these techniques to produce high-resolution images of the Earth's interior. In particular, seismic reflection imaging has played a key role in providing the knowledge we currently have on the internal architecture and geodynamic evolution of the heterogeneous crust and uppermost mantle. To date, the series has kept the spirit and aims of its inaugural symposium of 1984, but it has progressively incorporated new techniques using both controlled and natural sources and numerous innovations in data processing and modeling such as travel-time and full-waveform inversion for a wide range of scales ranging from near-surface to the whole mantle. The new tools led to improved resolution and accuracy of the images and models. Over the years, the technological developments and the incorporation of hybrid land-marine experiments have pushed the seismic imaging and modeling techniques even further, yielding more reliable information to improve our knowledge of the Earth's structure, nature and dynamics. Novel approaches are used in an increasingly wide and complex range of geological and tectonic settings including cratons and orogens, convergent and rifted margins, mid-ocean ridges, island arcs, and so forth.

In June 2016 Department of Dental Anthropology, School of Dental Medicine, University of Zagreb marked its 50th anniversary with the Dental Anthropology Scientific Symposium (DASS Zagreb 2016). Chair of Forensic Dentistry forms part of the Department since 1997, developing forensic odontology in university education, research and as a profession in Croatia. The DASS Zagreb 2016 had two main scientific topics: dental anthropology and forensic odontology. The meeting was structured into four scientific sessions with 25 oral and 17 poster presentations, and a workshop on the Arizona State University Dental Anthropology System. There were 65 participants and more than a half were international participants from 15 European countries (including Russia and Turkey), Canada, India, Sudan and USA.

This paper reviews the International Symposium on China Studies effectuated in Pacific Headquarters “Arnoldo Ferreto Segura” at the University of Costa Rica during the June 18th and 19th, 2012, and organized in collaboration with the Confucius Institute and the Puntarenas Chinese Association. This activity brought together scholars from different countries dedicated to the different topics related to China, mainly regarding its development and influence in the world and the integration of Chinese immigrants in Latin America. Este artículo reseña el Simposio Internacional sobre Estudios de China efectuado en la Sede del Pacífico “Arnoldo Ferreto Segura” de la Universidad de Costa Rica durante los días 18 y 19 de junio de 2012, y organizado con la colaboración del Instituto Confucio y la Asociación China Puntarenense. Esta actividad reunió a académicos de diferentes países dedicados a los diferentes temas relacionados con China, principalmente los que atañen a su desarrollo e influencia en el mundo y la inserción de los inmigrantes chinos en Latinoamérica.

During the past century, environmental hazards have become a major concern, not only to public health professionals, but also to the society at large because of their tremendous health, socio-cultural and economic impacts. Various anthropogenic or natural factors have been implicated in the alteration of ecosystem integrity, as well as in the development of a wide variety of acute and/or chronic diseases in humans. It has also been demonstrated that many environmental agents, acting either independently or in combination with other toxins, may induce a wide range of adverse health outcomes. Understanding the role played by the environment in the etiology of human diseases is critical to designing cost-effective control/prevention measures. This special issue of International Journal of Environmental Research and Public Health includes the proceedings of the Twelfth International Symposium on Recent Advances in Environmental Health Research. The Symposium provided an excellent opportunity to discuss the scientific advances in biomedical, environmental, and public health research that addresses global environmental health issues.

Date of Conference: 6-11 July 2008 Conference name: 2008 IEEE International Symposium on Information Theory A method is proposed, called channel polarization, to construct code sequences that achieve the symmetric capacity I(W) of any given binary-input discrete memoryless channel (B-DMC) W. The symmetric capacity I(W) is the highest rate achievable subject to using the input letters of the channel equiprobably and equals the capacity C(W) if the channel has certain symmetry properties. Channel polarization refers to the fact that it is possible to synthesize, out of N independent copies of a given B-DMC W, a different set of N binary-input channels such that the capacities of the latter set, except for a negligible fraction of them, are either near 1 or near 0. This second set of N channels are well-conditioned for channel coding: one need only send data at full rate through channels with capacity near 1 and at 0 rate through the others. The main coding theorem about polar coding states that, given any B-DMC W with I(W) > 0 and any fixed 0 < δ < I(W), there exist finite constants n1 (W, δ) and c(W, δ) such that for all n ≥ n1, there exist polar codes with block length N = 2n, rate R > I(W)-δ, and probability of block decoding error Pe ≤ cN-1/4. The codes with this performance can be encoded and decoded within complexity O(N log N). © 2008 IEEE.

This paper derives robust niiniinax estimators for a class of uncertain models. The uncertainty is described by a relative entropy constraint between the unknown joint distribution and a fixed nominal joint distribution. The maximization is addressed using variational methods, while the minimization is addressed using the concept of a sufficient statistic, which is an unnormalized version of the a posteriori density. The theory developed is applied to multipath fading wireless channels, to derive minimax envelope and phase estimates. Related results are also derived when the uncertainty shrinks to zero. © 2008 IEEE. 1238 1242

In this paper we consider the frameworks of Process Algebra and I/O Automata and we apply both towards the verification of a distributed leader-election protocol. Based on the two experiences we evaluate the approaches and draw initial conclusions with respect to their relative capabilities, strengths and usability. To the best of our knowledge, this is the first hands-on evaluation of the two models, and we view it as the cornerstone for a wider investigation of the strengths and weaknesses of the two methodologies in specifying and verifying (distributed) protocols. © 2008 IEEE. 195 204 Sponsors: IEEE Comput. Soc. Technical Committee on Distributed Processing Akamai Technologies, Inc. International Research Institute on Autonomic Network Computing Conference code: 73523 Cited By :5

In this paper we present FailRank, a novel framework for integrating and ranking information sources that characterize failures in a grid system. After the failing sites have been ranked, these can be eliminated from the job scheduling resource pool yielding in that way a more predictable, dependable and adaptive infrastructure. We also present the tools we developed towards evaluating the FailRank framework. In particular, we present the FailBase Repository which is a 38GB corpus of state information that characterizes the EGEE Grid for one month in 2007. Such a corpus paves the way for the community to systematically uncover new, previously unknown patterns and rules between the multitudes of parameters that can contribute to failures in a Grid environment. Additionally, we present an experimental evaluation study of the FailRank system over 30 days which shows that our framework identifies failures in 93% of the cases. We believe that our work constitutes another important step towards realizing adaptive Grid computing systems. © 2008 IEEE. 291 298 Conference code: 73523 Cited By :2

Wireless mesh networks (WMNs) based on the IEEE802.11 standards can be used as convenient replacements of wireline networks in the context of home networking to provide users with a variety of services inside the home context for their low cost and easiness of deployment. However, in order to effectively support multimedia as well as ordinary traffic through a WMN infrastructure, traffic control is generally needed as wireless communications, especially in mesh network configurations, can be affected by significant congestion and channel impairments problems. In this work we are focusing on performance assessment and enhancement in IEEE802.11 WMNs. Experimental results are presented using simulation models of IEEE802.11b technology obtained through the open source INET framework of OMNET++ simulator.

Date of Conference: 17-19 March 2008 Conference name: 9th International Symposium on Quality Electronic Design, ISQED 2008 Executing array based applications on a chip multiprocessor requires effective loop parallelization techniques. One of the critical issues that need to be tackled by an optimizing compiler in this context is loop scheduling, which distributes the iterations of a loop to be executed in parallel across the available processors. Most of the existing work in this area targets cache based execution platforms. In comparison, this paper proposes the first dynamic loop scheduler, to our knowledge, that targets scratch-pad memory (SPM) based chip multiprocessors, and presents an experimental evaluation of it. The main idea behind our approach is to identify the set of loop iterations that access the SPM and those that do not. This information is exploited at runtime to balance the loads of the processors involved in executing the loop nest at hand. Therefore, the proposed dynamic scheduler takes advantage of the SPM in performing the loop iteration-to-processor mapping. Our experimental evaluation with eight array/loop intensive applications reveals that the proposed scheduler is very effective in practice and brings between 13.7% and 41.7% performance savings over a static loop scheduling scheme, which is also tested in our experiments. © 2008 IEEE.

In this study the value of magnetic resonance image (MRI) shape and texture analysis was assessed in multiple sclerosis (MS) subjects, both in differentiating between normal and abnormal tissue and in assessing disease progression. Shape and texture analysis was carried out in normal and diseased lesions in transverse sections of T2-weighted magnetic resonance (MR) images acquired from 10 symptomatic untreated subjects with clinically isolated syndrome (CIS) scanned twice, with an interval of 6-12 months. All detected brain lesions were manually segmented by an experienced neurologist and confirmed by a neuro-radiologist, whilst different shape and texture features were extracted from the segmented lesions. The results showed that there was no significance difference between shape features of 0 and 6-12 months. For some texture features there was significance difference between normal tissue and MS lesions at 0 and 6-12 months and between MS lesions at 0 and 6-12 months (i.e contrast, difference variance, difference entropy, and other). Further research with more subjects is required for computing shape and texture features that may provide information for differentiating between normal tissue and MS lesions as well as for longitudinal monitoring of these lesions. In addition the proposed methodology can be used for the assessment of subjects at risk of developing future neurological events. The extracted shape and features can also offer additional information of undiagnosed lesions. ©2008 IEEE. 58 61 Sponsors: Chinese Acad. Sci. Shenzhen Academician Consultation Center Chinese University of Hong Kong Chinese Academy of Sciences Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced Technology Key Laboratory for Biomedical Informatics and Health Engineering Conference code: 73498 Cited By :7

In this work, using a game-theoretic approach, cost-sensitive mechanisms that lead to reliable Internet-based computing are designed. In particular, we consider Internet-based master-worker computations, where a master processor assigns, across the Internet, a computational task to a set of potentially untrusted worker processors and collects their responses. Several game-theoretic models that capture the nature of the problem are analyzed and mechanisms that, for each given set of cost and system parameters, achieve high reliability are designed. Additionally, two specific realistic system scenarios are studied. These scenarios are a system of volunteering computing like SETI, and a company that buys computing cycles from Internet computers and sells them to its customers in the form of a task-computation service. Notably, under certain conditions, non redundant allocation yields the best trade-off between cost and reliability. © 2008 IEEE. 315 324 Sponsors: IEEE Comput. Soc. Technical Committee on Distributed Processing Akamai Technologies, Inc. International Research Institute on Autonomic Network Computing Conference code: 73523 Cited By :11

Date of Conference: 1-3 April 2008 Conference name: 6th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks and Workshops, 2008 This paper aims at comparing through simulations the network lifetime of a wireless sensor network using Bluetooth-enabled or IEEE802.15.4 compliant devices. The evaluation is performed under a common reference framework, namely the EMORANS scenario for wireless sensor networks. Since the two enabling technologies rely on different MAC paradigms, suitable definition of the performance metrics is needed, in order to make the comparison meaningful. Thus, the paper has also a methodological objective. In particular, three different definitions of network lifetime are introduced, and a comparison of performance obtained by applying the different definitions is provided. Then, the comparison between the two standards is introduced: it is shown that there are no orders of magnitude of difference in network lifetime when the two technologies are used and the choice of the technology depends on the application requirements.

Bagging and subagging procedures are put forth with the purpose of improving the discovery power in the context of large-scale simultaneous hypothesis testing. Bagging and subagging significantly improve discovery power at the cost of a small increase in false discovery rate with 'maximum contrast' subagging having an edge over bagging, i.e., yielding similar power but significantly smaller false discovery rates. The proposed procedures are implemented in a situation involving a well known dataset on gene expressions related to prostate cancer. © 2008 Springer-Verlag Berlin Heidelberg. 4983 LNBI 492 503 Conference code: 73292 Cited By :3

Models and specifications can be used in the design of distributed applications to formally reason about their safety properties. However, the benefits of using formal methods are often negated by the ad hoc process of mapping the semantics of an abstract specification to algorithms designed to be executed on target distributed platforms. The challenge of formally specifying communication channels and correctly implementing them as algorithms that use realistic distributed system services is the focus of this paper. This work provides an original formal specification of an abstract asynchronous communication channel with support for dynamic creation and tear down of links between participating network nodes, and its implementation as an algorithm using Java sockets. The specification and the algorithm are expressed using the Input/Output Automata formalism, and it is proved that the algorithm correctly implements the specification, viz. that any externally observable behavior (trace) of the algorithm has a corresponding behavior of the specification. The approach presented here can be used to implement algorithms for dynamic systems, where communicating nodes may join, leave, and experience delays. The result is also of direct benefit to automated code generation, such as that implemented within the Input/Output Automata Toolkit at MIT. © 2008 IEEE. 211 219 Sponsors: IEEE Comput. Soc. Technical Committee on Distributed Processing Akamai Technologies, Inc. International Research Institute on Autonomic Network Computing Conference code: 73523 Cited By :2

Neural networks were applied in an effort to predict the risk for early spontaneous preterm delivery using various demographic, clinical, and laboratory inputs. Furthermore, attention has been focused on the influence of cervical length (CL) for the prediction of spontaneous preterm delivery. Data for 59,313 cases of pregnant women were collected and processed. The final data used were those that were considered to offer clear indication on the significance of cervical length on the prediction. The cervical length was measured by sonography in the range of 22-24 weeks of gestation. Preliminary results showed a prediction rate of approximately 65% was attained through the application of a variety of neural network topologies. It has been found that if the cervical length is excluded from the input data, this results in an approximately 10% decrease in the prediction yield, as obtained from the neural network predictor, thus the sensitivity to cervical length is quite significant. © 2008 IEEE. 423 425 Sponsors: Chinese Acad. Sci. Shenzhen Academician Consultation Center Chinese University of Hong Kong Chinese Academy of Sciences Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced Technology Key Laboratory for Biomedical Informatics and Health Engineering Conference code: 73498 Cited By :1

The compound capacity of uncertain MIMO channels is considered, when the channel is modeled by a class described by an induced norm constraint. Within this framework, two types of classes are investigated, namely, additive and multiplicative uncertainties subject to a spectral norm constraint, using partial channel state information at the transmitter side. The compound capacity is defined as a maxmin of the mutual information, corresponding to the capacity of the class, in which the minimization is done over the class of channels while the maximization is done over the transmit covariance. Closed form solutions for the compound capacity of the classes are obtained while several properties related to transmit and received eigenvectors are presented. It is also shown that capacity of the class of channels is equal to the worst-case channel capacity, while establishing a saddle-point property. Additionally, explicit closed-from solutions are given for the capacity-achieving Tx covariance matrix and the worst-case channel uncertainty. The effect of uncertainty is shown to be equivalent to an SNR loss which is proportional to the size of the uncertainty of the channel matrix measured by the spectral norm. © 2008 IEEE. 2578 2582

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Today, consumer electronic devices and PCs are inevitable parts of our daily life. Controlling those devices remotely is an important aspect of the technology. We have already universal remote control devices for controlling consumer electronic devices. Similarly, we may control our desktop and laptop PCs and their applications remotely via portable and smaller computers like PDAs and Pocket PCs. This paper presents a system and its architecture that enable a wireless-enabled PDA to control a PC and its applications remotely over a 802.11 or Bluetooth link. With such a system running on a PDA, a user can start, run and control PC applications from any location that is reachable via 802.11 link. This enables flexibility, ease of use, and freedom for the user of PC applications. ©2007 IEEE.

Date of Conference: 7-9 November 2007 Conference Name: 22nd International Symposium on Computer and Information Sciences, IEEE 2007 We present the solution of large-scale scattering problems involving three-dimensional closed conducting objects with arbitrary shapes. With an efficient parallelization of the multilevel fast multipole algorithm on relatively inexpensive computational platforms using distributed-memory architectures, we perform the iterative solution of integral-equation formulations that are discretized with tens of millions of unknowns. In addition to canonical problems, we also present the solution of real-life problems involving complicated targets with large dimensions.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Learning logical relations from examples expressed as first order facts has been studied extensively by the Inductive Logic Programming research. Learning with positive-only data may cause over generalization of examples leading to inconsistent resulting hypotheses. A learning heuristic inferring specific generalization of strings based on unique match sequences is shown to be capable of learning predicates with string arguments. This paper describes an inductive learner based on the idea of specific generalization of strings, and the given clauses are generalized by considering the background knowledge. ©2007 IEEE.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Keyphrases provide semantic metadata to summarize and characterize documents. Unfortunately, there are many digital documents especially on the Internet that do not have a list of assigned keyphrases. Assigning keyphrases to these documents manually is a tedious process and requires knowledge of the subject. Automatic Keyphrase Extraction solves this problem. In this paper, we present implementation of Keyphrase Extraction Algorithm (KEA) for Turkish as well as extending it with new features to improve its performance. ©2007 IEEE.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Threshold Broadcast Encryption (TBE) is a promising extension of threshold cryptography with its advantages over traditional threshold cryptosystems, such as eliminating the need of a trusted party, the ability of setting up the system by individual users independently and the ability of choosing the threshold parameter and the group of privileged receivers at the time of encryption. An ElGamal-based solution for TBE was proposed by Ghodosi et al. In this paper, we propose an improved ElGamal-based TBE scheme with reduced transmission cost. ©2007 IEEE.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Authorship attribution is the process of determining the writer of a document. In literature, there are lots of classification techniques conducted in this process. In this paper we explore information retrieval methods such as tf-idf structure with support vector machines, parametric and nonparametric methods with supervised and unsupervised (clustering) classification techniques in authorship attribution. We performed various experiments with articles gathered from Turkish newspaper Milliyet. We performed experiments on different features extracted from these texts with different classifiers, and combined these results to improve our success rates. We identified which classifiers give satisfactory results on which feature sets. According to experiments, the success rates dramatically changes with different combinations, however the best among them are support vector classifier with bag of words, and Gaussian with function words. ©2007 IEEE.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 Data management in Peer-to-Peer (P2P) systems is a complicated and challenging issue due to the scale of the network and highly transient population of peers. In this paper, we identify important research problems in P2P data management, and describe briefly some methods that have appeared in the literature addressing those problems. We also discuss some open research issues and directions regarding data management in P2P systems. ©2007 IEEE.

Date of Conference: 7-9 Nov. 2007 Conference name: 22nd international symposium on computer and information sciences, 2007 We propose novel parallel preconditioning schemes for the iterative solution of integral equation methods. In particular, we try to improve convergence rate of the ill-conditioned linear systems formulated by the electric-field integral equation, which is the only integral-equation formulation for targets having open surfaces. For moderate-size problems, iterative solution of the near-field system enables much faster convergence compared to the widely used sparse approximate inverse preconditioner. For larger systems, we propose an approximation strategy to the multilevel fast multipole algorithm (MLFMA) to be used as a preconditioner. Our numerical experiments reveal that this scheme significantly outperforms other preconditioners. With the combined effort of effective preconditioners and an efficiently parallelized MLFMA, we are able to solve targets with tens of millions of unknowns, which are the largest problems ever reported in computational electromagnetics. ©2007 IEEE.

Date of Conference: 1-4 July 2007 Conference name: 12th IEEE Symposium on Computers and Communications, 2007 UMTS is designed to offer high bandwidth radio access with QoS assurances for multimedia communications. In particular, real-time video communications services are expected to become a successful experience under UMTS networks. In this context, a video transmission service can be designed over the basis that UMTS can provide either a constant bit rate data channel or a dynamic variable bit rate data channel adapted to load conditions. In this latter approach, which is more efficient for both the user and the service provider, multimedia sources have to be timely designed in order to adapt their output rate to the instantaneous allowed channel rate. The target of this paper is to define an analytical model of adaptive real-time video sources in a UMTS network where system resources are dynamically shared among active users. © 2007 IEEE.

The high-level-architecture (HLA) is an IEEE standard for the interoperability and integration of (autonomous) simulation packages and applications (termed federates in the HLA context). It is based on a middleware-level component referred to as run-time-infrastructure (RTI) offering a set of interoperability services to the overlying simulation software. Time-management is the suite of services allowing synchronized execution among the federates, which, according to the HLA specification, covers pure conservative and pure optimistic synchronization schemes. In this paper we provide the design and implementation of a software layer, we refer to as risk-free-speculator (RFS), which supports an optimistic oriented intermediate approach to synchronization embedding the aggressiveness property of optimistic systems, but discarding risk. This is done in a totally transparent manner to the overlying applications, and does not even require any modification of the underlying RTI. The effectiveness of RFS has been tested against simulated demonstration exercises using the Joint Semi-Automated Forces (JSAF) simulation program.

Nowadays the H-bridge is one of the preferred solutions to connect DC loads or distributed sources to the single-phase grid. The control aims are: sinusoidal grid current with unity power factor and optimal DC voltage regulation capability. These objectives should be satisfied, regardless the conditions of the grid, the DC load/source and the converter nonlinearities. In this paper a passivity-based approach is thoroughly investigated proposing a damping-based solution for the error dynamics. Practical experiments with a real converter validate the analysis.