ppxscal/embedding_network huggingface dataset:
A Ka/EHF band geostationary satellite system to provide multimedia services to terrestrial and aeronautical users
Authors: Giacinto Losquadro, Michele Luglio, Francesco Vatalaro
Venue: Space Communications (1998)

This paper reports on a satellite mobile-multimedia system using both Ka-band and EHF, both for the fixed and the mobile user, which has been defined in Europe to support the UMTS satellite component. The system includes a terrestrial broadband communications component, and an aeronautical broadband communications component. Four types of terminals, characterized by different allowable data rates, are foreseen to cope with different service requirements. The paper describes the system architecture, the payload concept, the terminals typologies, and provides radiolink design results.
Neural network based audio signal denoising
Authors: Yongjian Chen, Masatake Akutagawa, Yohsuke Kinouchi, Qinyu Zhang
Venue: Proceedings of the 2008 International Conference on Advanced Infocomm Technology (2008)

In this paper, a novel filter is proposed by applying back propagation neural network (BPNN) ensemble where the noisy signal and the reference one are the same in a learning process. This neural network (NN) ensemble filter not only well reduces additive and multiplicative white noise inside signals, but also preserves signals' characteristics. It is proved that the reduction of noise using NN ensemble filter is better than the improved &epsilon; nonlinear filter and single NN filter while signal to noise ratio is low. The performance of the NN ensemble filter is demonstrated in the audio signals processing.
Dialogue-Based Broadcasting Protocol for Wireless Ad Hoc Networks
Authors: Keigo Hasegawa, Takeo Fujii, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki
Venue: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (2008)

This paper proposes a MAC protocol for efficient broadcasting in wireless ad hoc networks. Pure flooding leads to serious redundant broadcasts, packet contention and packet collisions, known as the broadcast stormproblem. This paper focuses on how to reduce the redundant broadcasts. Several protocols to achieve efficient broadcasting have been proposed. However a trade-off exists between the reachability and the broadcasting ratio, which is the ratio of the number of the broadcasting nodes to the number of received nodes. This paper proposes a new MAC protocol for on-demand broadcasting, which is referred to as dialogue-based protocol in order to resolve the trade-off. The dialogue-based protocol employs additional massages which are called as request packets and reply signals. They are exchanged in an on-demand manner, in order that relay candidate nodes recognize its neighbor nodes status whether they have already received the broadcast packets. Finally, by computer simulations, this paper presents that the dialogue-based scheme combines high reachability with low broadcasting ratio by using the low additional massages.
Fuzzy economic order time models with random demand
Authors: T. Vijayan, M. Kumaran
Venue: International Journal of Approximate Reasoning (2009)

Inventory models in which the time period of sales is a decision variable are considered in fuzzy environments. Arrival of customers and the number of customers in the planning period are both random. Several cases of the model with one or more of the components fuzzy are discussed. Models with trapezoidal and triangular fuzzy numbers are considered. Optimum policy of the models are derived and numerical examples are provided in order to ascertain the sensitiveness in the decision variable with respect to fuzziness in the components.
Fault Tolerance in Distributed Mechanism Design
Authors: Ronen Gradwohl
Venue: Proceedings of the 4th International Workshop on Internet and Network Economics (2008)

We argue that in distributed mechanism design frameworks it is important to consider not only rational manipulation by players, but also malicious, faulty behavior. To this end, we show that in some instances it is possible to take a centralized mechanism and implement it in a distributed setting in a fault tolerant manner. More specifically, we examine two distinct models of distributed mechanism design --- a Nash implementation with the planner as a node on the network, and an ex post Nash implementation with the planner only acting as a "bank". For each model we show that the implementation can be made resilient to faults.
MediaGLOW: organizing photos in a graph-based workspace
Authors: Andreas Girgensohn, Frank Shipman, Lynn Wilcox, Thea Turner, Matthew Cooper
Venue: Proceedings of the 13th international conference on Intelligent user interfaces (2009)

We designed an interactive visual workspace, MediaGLOW, that supports users in organizing personal and shared photo collections. The system interactively places photos with a spring layout algorithm using similarity measures based on visual, temporal, and geographic features. These similarity measures are also used for the retrieval of additional photos. Unlike traditional spring-based algorithms, our approach provides users with several means to adapt the layout to their tasks. Users can group photos in stacks that in turn attract neighborhoods of similar photos. Neighborhoods partition the workspace by severing connections outside the neighborhood. By placing photos into the same stack, users can express a desired organization that the system can use to learn a neighborhood-specific combination of distances.
Concept and Design of a Contextual Mobile Multimedia Content Usability Study
Authors: Zahid Hussain, Martin Lechner, Harald Milchrahm, Sara Shahzad, Wolfgang Slany, Martin Umgeher, Peter Wolkerstorfer
Venue: Proceedings of the 2009 Second International Conferences on Advances in Computer-Human Interactions (2009)

The popularity of consuming multimedia content on mobile phones is increasing more and more, not only because of the availability of the technical infrastructure, but also because of the mobility in modern society. We are developing a mobile multimedia streaming application. The crucial factor for such applications in order to be adopted and successful is user acceptance. This paper presents the preliminary concept and design of a contextual mobile multimedia content usability study. The study is conducted within are search project on agile software development methodologies with special emphasis on Extreme Programming and continuous usability evaluation. Past work included satisfaction of the needs of end users by means of focusing on user-experience in all steps of the development process. To gain scientific relevant data, the careful design of a study is considered most important. The study which will be conducted in October 2008 will give insights into mobile HCI concerning the coherence of content types, consumption times, and consumption contexts.
Analysis and Improvement for 802.15.4 Multi-hop Network
Authors: Maoheng Sun, Kaijian Sun, Youmin Zou
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 02 (2009)

IEEE 802.15.4 is a protocol for low-rate wireless personal area networks. It contains two topologies: the star topology and the peer-to-peer topology. It has good performances for the star topology. However, the beacon collisions with other beacons, data or control frames make the multi-hop beacon-enabled mode difficult to be built and maintained. Although nonbeacon-enabled has better performance, it also suffers from the hidden terminal problem, which becomes much more serious in the multi-hop network. So an improved scheme for IEEE 802.15.4 nonbeacon-enabled multi-hop network is discussed. Extensive ns-2 simulations are used to verify the proposed scheme. The results show that the proposed scheme can solve the problem availably and can achieve much better performance than the previous standard.
Underwater Transient Signal Classification Using Binary Pattern Image of MFCC and Neural Network
Authors: Taegyun Lim, Keunsung Bae, Chansik Hwang, Hyeonguk Lee
Venue: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (2008)

This paper presents a new method for classification of underwater transient signals, which employs a binary image pattern of the mel-frequency cepstral coefficients as a feature vector and a feed-forward neural network as a classifier. The feature vector is obtained by taking DCT and 1-bit quantization for the square matrix of the mel-frequency cepstral coefficients that is derived from the frame based cepstral analysis. The classifier is a feed-forward neural network having one hidden layer and one output layer, and a back propagation algorithm is used to update the weighting vector of each layer. Experimental results with underwater transient signals demonstrate that the proposed method is very promising for classification of underwater transient signals.
The Research of Adaptive Digital Predistortion Based on SISO-Neural Network
Authors: Qiu Wei, Zhong Zhi-ming, Ren Guo-chun, Xu Yi-tao
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 01 (2009)

Because of the inherent nonlinearity of high power amplifier, there are in-band distortion and adjacent-channel interference, which may have a negative influence on communication systems. We have to make a linearization processing to overcome them. First, this paper attempts to analyze nonlinearity distortion of HPA in a mathematic approach, and then briefly introduces the basic principle about digital predistortion. Furthermore, after depicting simple neural network, the paper proposed an adaptive digital predistortion technology based on Single Input and Single Onput Neural Network(SISO-Neural Network), which can improve third-order and fifth-order intermodulation effectively. The proposed technique is more advantageous on convergence speed and complicacy of hardware realization compared with polynomial-fitting technique. Last, a matlab simulation of double-tone signal is done and the results also verify that the proposed technique is superior.
A Scheme of Restricted Flooding and Greedy Forwarding Routing for Object Tracking Sensor Networks
Authors: Yuanguo Cheng, Guohui Li
Venue: International Journal of Distributed Sensor Networks (2009)

A protocol named RFGFR (Restricted Flooding and Greedy Forwarding Routing) is presented in this paper. RFGFR propagates query packets from the sink to the centroid of a target region, it employs a scheme of restricted flooding and greedy forwarding results in fewer nodes to forward packets, which means less energy consumption. Greedy forwarding decision can reduce transmission delay by reducing communication hops. Simulations show RFGFR exhibits better performances for object tracking in sensor networks.
Statistical analysis of simulation output
Authors: Marvin K. Nakayama
Venue: Proceedings of the 40th Conference on Winter Simulation (2008)

We discuss methods for statistically analyzing the output from stochastic discrete-event or Monte Carlo simulations. Terminating and steady-state simulations are considered.
Knowledge Base and Experience Factory for Empowering Competitiveness
Authors: Giuseppe Visaggio
Venue: Software Engineering: International Summer Schools, ISSSE 2006-2008, Salerno, Italy, Revised Tutorial Lectures (2009)

As it is well-known, knowledge exploitation is becoming the focus of the economy for the competitiveness of both organizations and countries. In this chapter some models that enable enterprises towards the knowledge society are presented. An Experience Factory is suggested as support to such behavioral models. It collects empirical experiences as Experience-Knowledge Packages. The most relevant innovation of the chapter is represented by the contents and structure of the packages which are different from ones in the literature. The changes made to the structure aim to convince potential addressees to use the contents of the packages and favor their adoption independently from the author(s) of the package. Consequently, the proposed structure allows to produce packages incrementally and cooperatively. The proposed changes derive from the lessons learnt in previous experiences of technology transfer. The chapter presents the PROMETHEUS platform which implements all the requirements for collecting and distributing Knowledge-Experience Packages.
Robot motion planning using generalised voronoi diagrams
Authors: Miloš Šeda, Václav Pich
Venue: Proceedings of the 8th conference on Signal processing, computational geometry and artificial vision (2008)

In robot motion planning in a space with obstacles, the goal is to find a collision-free path of robot from the starting to the target position. There are many fundamentally different approaches, and their modifications, to the solution of this problem depending on types of obstacles, dimensionality of the space and restrictions for robot movements. Among the most frequently used are roadmap methods (visibility graphs, Voronoi diagrams, rapidly exploring random trees) and methods based on cell decomposition. A common feature of all these methods is the generating of trajectories composed from line segments. In this paper, we will show that generalised Voronoi diagrams can be used for fast generation of smooth paths sufficiently distant from obstacles.
Gesture Modelling for Linguistic Purposes
Authors: Guillaume J. Olivrin
Venue: Gesture-Based Human-Computer Interaction and Simulation: 7th International Gesture Workshop, GW 2007, Lisbon, Portugal, May 23-25, 2007, Revised Selected Papers (2009)

The study of sign languages attempts to create a coherent model that describes the expressive nature of signs conveyed in gestures with a linguistic framework. 3D gesture modelling offers a precise annotation and representation of linguistic constructs and can become an entry mechanism for sign languages. This paper presents the requirements to build an input method editor for sign languages and the initial experiments using signing avatars input interfaces. The system currently saves and annotates 3D gestures on humanoid models with linguistic labels. Results show that the annotating prototype can be used in turn to ease and guide the task of 3D gesture modelling. The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
Linking stakeholder salience with mobile services diffusion
Authors: Indrit Troshani, Sally Rao Hill
Venue: International Journal of Mobile Communications (2009)

Using qualitative evidence from the Australian mobile telecommunications industry, this study employs social network theory to show how organisational stakeholders can use their salience to affect network interaction dynamics to influence mobile services diffusion. We found that carriers' definitive leverage brand loyalty to become influential stakeholders. Industry associations have ineffectively undertaken diverse mechanisms for achieving power for themselves and mobile end-users while the government regulator has successfully undertaken co-regulation to fulfil its end-user protection objectives. Our analysis explains, at least partially, the limited diffusion of mobile services in Australia.
UV nanoimprint using flexible polymer template and substrate
Authors: Sung-Hoon Hong, Jae-Yeon Hwang, Heon Lee, Hee-Chul Lee, Kyung-Woo Choi
Venue: Microelectronic Engineering (2009)

Nano to micro-sized patterns were formed on a flexible polymer substrate using a flexible UV imprint stamp. A 6in. diameter flexible UV nanoimprint template was fabricated using PVC hot embossing and DLC coating. Using the UV nanoimprint process with the DLC coated PVC template, nano to micro-sized patterns were clearly formed on the flexible PET substrate without a residual layer, due to the antistiction properties and high mechanical hardness of the DLC coating. By depositing a Cr layer on the imprinted resist pattern and lifting it off, Cr metal patterns were fabricated on the PET substrate.
Analysis and Proposal of Position-Based Routing Protocols for Vehicular Ad Hoc Networks
Authors: Hiraku Okada, Akira Takano, Kenichi Mase
Venue: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (2008)

One of the most promising applications of a mobile ad hoc network is a vehicular ad hoc network (VANET). Each vehicle is aware of its position information by GPS or other methods, so position-based routing is a useful approach in VANET. The position-based routing protocol can be classified roughly into a next-hop forwarding method and a directed flooding method. We evaluate performance of both methods by analytic approach and compare them in this paper. From the evaluation results, we conclude that it is effective for the position-based routing to choose either the next-hop forwarding method or the directed flooding method according to the environment. Then we propose the hybrid transmission method which can select one of them according to the environment, and clarify that the proposed method can keep the packet delivery ratio at a high level and reduce the delay time.
Completeness and Complexity of Multi-modal CTL
Authors: Thomas Ågotnes, Wiebe van der Hoek, Michael Wooldridge
Venue: Electronic Notes in Theoretical Computer Science (ENTCS) (2009)

We define a multi-modal version of Computation Tree Logic (ctl) by extending the language with path quantifiers E^@d and A^@d where @d denotes one of finitely many dimensions, interpreted over Kripke structures with one total relation for each dimension. As expected, the logic is axiomatised by taking a copy of a ctl axiomatisation for each dimension. Completeness is proved by employing the completeness result for ctl to obtain a model along each dimension at a time. We also show that the logic is decidable and that its satisfiability problem is no harder than the corresponding problem for ctl.
Parsimonious temporal aggregation
Authors: Juozas Gordevičius, Johann Gamper, Michael Böhlen
Venue: Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology (2009)

Temporal aggregation is a crucial operator in temporal databases and has been studied in various flavors, including instant temporal aggregation (ITA) and span temporal aggregation (STA), each having its strengths and weaknesses. In this paper we define a new temporal aggregation operator, called parsimonious temporal aggregation (PTA), which comprises two main steps: (i) it computes the ITA result over the input relation and (ii) it compresses this intermediate result to a user-specified size c by merging adjacent tuples and keeping the induced total error minimal; the compressed ITA result is returned as the final result. By considering the distribution of the input data and allowing to control the result size, PTA combines the best features of ITA and STA. We provide two evaluation algorithms for PTA queries. First, the oPTA algorithm computes an exact solution, by applying dynamic programming to explore all possibilities to compress the ITA result and selecting the compression with the minimal total error. It runs in O(n2pc) time and O(n2) space, where n is the size of the input relation and p is the number of aggregation functions in the query. Second, the more efficient gPTA algorithm computes an approximate solution by greedily merging the most similar ITA result tuples, which, however, does not guarantee a compression with a minimal total error. gPTA intermingles the two steps of PTA and avoids large intermediate results. The compression step of gPTA runs in O(np log(c + &delta;)) time and O(c + &delta;) space, where &delta; is a small buffer for "look ahead". An empirical evaluation shows good results: considerable reductions of the result size introduce only small errors, and gPTA scales to large data sets and is only slightly worse than the exact solution of PTA.
Information processing needs and practices of clinical investigators: survey results
Authors: Norman A. Palley, Gabriel F. Groner
Venue: Proceedings of the May 19-22, 1975, national computer conference and exposition (1975)

Although medical researchers were among the first to pursue the promise of computerization, clinical investigators, namely physicians who conduct research into the biology of human subjects and who evaluate the efficacy of new therapeutic measures, have not shared even modestly in the benefits so far available. With the expectation that improved information processing techniques and facilities can improve the quality and efficiency of clinical research and ultimately patient care, The Division of Research Resources (DRR) of the National Institutes of Health (NIH) has been sponsoring a scientific inquiry (called CLINFO) aimed at first developing a detailed understanding of the information processing needs and current practices of clinical investigators and then developing methods for generally and economically alleviating some of the most important needs. The CLINFO investigation team consists of clinical investigators (T. Graham Christopher, M.D. at the University of Washington, Arthur W. Nunnery, M.D. at the University of Oklahoma and Howard K. Thompson, Jr., M.D. at the Baylor College of Medicine), the authors and other information scientists at The Rand Corporation, and William R. Baker, Jr., the CLINFO Project Officer, and other staff members of the DRR.
The impact of Ada on software engineering
Authors: Kenneth L. Bowles
Venue: Proceedings of the June 7-10, 1982, national computer conference (1982)

The term software engineering has traditionally been applied to extremely diverse activities, ranging from system programming to managing programmer teams. Ada appears destined to become the first widely used programming language designed to bring these diverse activities together in ways supported by both programmers and managers. Among many important aspects of the Ada language, the most important appear to be (1) its orientation to system construction using interchangeable building-block packages, and (2) strong standardization in the interest of program portability. These aspects should foster the emergence of a new kind of software component industry. A probable result will be an inversion of the traditional view of software as an added value for use on major hardware products. Instead, major machine-independent software systems will emerge, and hardware will be increasingly regarded as an added value.
A Distributional Concept for Modeling Dialectal Variation in TTS
Authors: Friedrich Neubarth, Christian Kranzler
Venue: Multimodal Signals: Cognitive and Algorithmic Issues: COST Action 2102 and euCognition International School Vietri sul Mare, Italy, April 21-26, 2008 Revised Selected and Invited Papers (2009)

Current TTS systems usually represent a certain standard of a given language, regional or social variation is barely reflected. In this paper, we describe certain strategies for modeling language varieties on the basis of a common language resource, in particular Austrian varieties from German sources. The goal is to find optimal procedures in order to represent these differences with minimal efforts in annotation and processing. We delimit the discussion to the lower levels of the transformation of linguistic information --- phonetic encoding. One question is if it is necessary or desirable to aim at maximal accurateness of the phonetic transcriptions. We will show that while certain differences could in principle be captured by the context within the speech data, other differences definitely have to be re-modelled, since they either involve ambiguous correspondences, or the string of phones is different in such a way that automatic procedures such as alignment or unit selection would be negatively affected, hence degrade the overall quality of the synthesized speech.