ppxscal/embedding_network huggingface dataset:
A Wearable Haptic Display to Present the Gravity Sensation - Preliminary Observations and Device Design
Authors: Kouta Minamizawa, Hiroyuki Kajimoto, Naoki Kawakami, Susumu Tachi
Venue: Proceedings of the Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2007)

We propose a wearable, ungrounded haptic display that presents the realistic gravity sensation of a virtual object. We focused on the shearing stress on the fingerpads duo to the weight of the object, and found that the deformation of the fingerpads can generate the reliable gravity sensation even when the proprioceptive sensation on the wrist or arm is absent. This implies that a non-grounded gravity display can be realized by reproducing the fingerpad deformation. According to our observations, we had evaluation tests for device design. We implemented the prototype device which has simple structure using dual motors, and then evaluated the recognition ability of the gravity sensation presented on operator's fingerpads with this method.
LaCOLLA: Middleware for Self-Sufficient Online Collaboration
Authors: Joan Manuel Marques, Xavier Vilajosana, Thanasis Daradoumis, Leandro Navarro
Venue: IEEE Internet Computing (2007)

LaCOLLA middleware makes it possible for collaborators to interact using their own resources without depending on centralizedregimes. By contributing their own resources, groupmembers can organize and communicate using a federated peer-to-peer model. This letsthegroup function regardless of whether a member removes resources and despite network ornode failures or disconnection. In turn, thiscapacity for self-organization, together withlocation transparency, lets application developers create self-sufficient applications forcollaborative activity.
Producing Softness Sensation on an Electrostatic Texture Display for Rendering Diverse Tactile Feelings
Authors: Hideaki Yokota, Akio Yamamoto, Hiroaki Yamamoto, Toshiro Higuchi
Venue: Proceedings of the Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2007)

This paper investigates the possibility of producing two different tactile feelings on one device. A simple mechanism for softness presentation was integrated with an electrostatic tactile display that can generate surface texture sensations. The principle of softness presentation is contact-width control, where contact width between a fingertip and the display is controlled corresponding to contact force. In the prototype, the softness-producing mechanism deforms the slider film of the electrostatic display so as to control the contact width between the fingertip and the film. Experimental results showed that the prototype could successfully elicit softness sensations, although the perceived softness was slightly harder than the intended softness.
Ontology Revision on the Semantic Web: Integration of belief revision theory
Authors: Seung Hwan Kang, Sim Kim Lau
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Ontology is used to define terms and relations on the Semantic Web to form well-structured semantics of Web resources. Ontology revision refers to the process of updating ontology to ensure changes are made in a consistent manner. Belief revision theory deals with approaches to ensure consistency in the belief sets is maintained when beliefs need to be revised. This paper discusses the integration of belief revision theory to the ontology reengineering method as a means to ensure consistency in ontology revision.
First and second kind paraorthogonal polynomials and their zeros
Authors: Manwah Lilian Wong
Venue: Journal of Approximation Theory (2007)

Given a probability measure @m with infinite support on the unit circle @?D={z:|z|=1}, we consider a sequence of paraorthogonal polynomials h"n(z,@l) vanishing at z=@l where @l@?@?D is fixed. We prove that for any fixed z"0@?supp(d@m) distinct from @l, we can find an explicit @r>0 independent of n such that either h"n or h"n"+"1 (or both) has no zero inside the disk B(z"0,@r), with the possible exception of @l. Then we introduce paraorthogonal polynomials of the second kind, denoted s"n(z,@l). We prove three results concerning s"n and h"n. First, we prove that zeros of s"n and h"n interlace. Second, for z"0 an isolated point in supp(d@m), we find an explicit radius @r@? such that either s"n or s"n"+"1 (or both) have no zeros inside B(z"0,@r@?). Finally, we prove that for such z"0 we can find an explicit radius such that either h"n or h"n"+"1 (or both) has at most one zero inside the ball B(z"0,@r@?).
Wavelet-based multi-carrier CDMA for personal communications systems
Authors: KyungHi Chang
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 03 (1996)

Based on the properties of wavelet orthogonal basis, three novel wavelet-based multi-carrier CDMA (MC-CDMA) systems are proposed, and their advantages and performances are investigated by the comparison with the conventional MC-CDMA systems. For the additive white Gaussian noise (AWGN) channel, all three wavelet-based MC-CDMA systems possess the same bit error rates as the corresponding MC/BPSK-CDMA and MC/QPSK-CDMA systems, but have significant higher bandwidth efficiency than the conventional MC-CDMA systems by the suitable choice of wavelet functions. Their potential applications in the broadband wireless communications to improve bandwidth efficiency and combat the fading and narrowband interference are also discussed.
Compiling a lexicon of cooking actions for animation generation
Authors: Kiyoaki Shirai, Hiroshi Ookawa
Venue: Proceedings of the COLING/ACL on Main conference poster sessions (2006)

This paper describes a system which generates animations for cooking actions in recipes, to help people understand recipes written in Japanese. The major goal of this research is to increase the scalability of the system, i.e., to develop a system which can handle various kinds of cooking actions. We designed and compiled the lexicon of cooking actions required for the animation generation system. The lexicon includes the action plan used for animation generation, and the information about ingredients upon which the cooking action is taken. Preliminary evaluation shows that our lexicon contains most of the cooking actions that appear in Japanese recipes. We also discuss how to handle linguistic expressions in recipes, which are not included in the lexicon, in order to generate animations for them.
Energy-Aware Tag Anti-Collision Protocols for RFID Systems
Authors: Vinod Namboodiri, Lixin Gao
Venue: Proceedings of the Fifth IEEE International Conference on Pervasive Computing and Communications (2007)

Energy consumption of mobile readers is becoming an important issue as applications of RFID systems pervade different aspects of our lives. Surprisingly, however, these systems are not energy-aware with the focus till date being on reducing the time to read all tags by the reader. The problem of tag arbitration in RFID systems is considered with the aim of trading off time for energy savings at the reader. The approach of using multiple time slots per node of a binary search tree is explored through three anti-collision protocols that aim to reduce the number of colliding responses from tags. This results in fewer reader queries and tag responses and, hence, energy savings at both the reader and tags (if they are active tags). An analytical framework is developed to predict the performance of our protocols, with the numerical evaluation of this framework validated through simulation. It is shown that all three protocols provide significant energy savings when compared to the existing Query Tree protocol while sharing the deterministic and memoryless properties of the latter.
Infant Mortality--The Lesser Known Reliability Issue
Authors: T. M. Mak
Venue: Proceedings of the 13th IEEE International On-Line Testing Symposium (2007)

Infant Mortality problems have been around for a long time (maybe that is why sometimes we have a shorter warranty period for many electronic products). Anyway, the explanation of infant mortality is that these are left over (or latent) defects. Defects that do not necessarily expose themselves and they can skip by all the manufacturing tests, including system test. However, with electrical and thermal stresses during use, they will eventually degrade to cause a significant functionality problem and will result as a failed system in the field. Product may last for hours to months if such a latent defect is trapped within.
Virtual dropping for endpoint admission control
Authors: T. Braun, M. Scheidegger, M. Studer
Venue: Proceedings of the End-to-End Monitoring Techniques and Services on 2005. Workshop (2005)

Endpoint admission control is a scalable QoS mechanism that relies on measuring the amount of lost or marked packets of a probing stream before allowing user data flows to enter the network. The existing approaches can be classified based on whether or not they use a separate traffic class for probing traffic, and whether or not they rely on a marking mechanism. Approaches that use a separate traffic class and rely on a marking mechanism are called out-of-band marking approaches and have proven to be most reliable but are also hard to deploy. As an alternative for out-of-band marking the approach of virtual dropping has been proposed, which discards packets that would have been marked otherwise, based on a virtual queue algorithm, thus removing the requirement of a common marking scheme. This paper compares the behavior of virtual dropping and out-of-band marking. Both mechanisms do not behave exactly the same, but differ slightly.
Cost-Function-Based Network Selection Strategy in Integrated Wireless and Mobile Networks
Authors: Wei Shen, Qing-An Zeng
Venue: Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02 (2007)

Any single type of existing wireless and mobile network cannot provide all types of services, e.g., wide coverage and high bandwidth. An integrated wireless and mobile net- work is introduced by combining different types of networks to provide more comprehensive services. In an integrated wireless and mobile network, a mobile terminal equipped with heterogeneous network interfaces can connect to dif- ferent types of networks. Therefore, how to select a de- sired network is an important issue in the integrated wire- less and mobile network. Although some network selection strategies have been proposed, most of them are designed to meet users' needs, such as bandwidth, money cost, or power consumption. Also, the system performance has not been touched. In this paper, we propose a cost-function-based network selection (CFNS) strategy in an integrated wireless and mobile network from system's perspective. We also an- alyze the system performance of the proposed strategy using theoretical model and simulations. The results show that the proposed network selection strategy affects multiple system parameters, which needs to be handled carefully.
KnowFlow - A Hybrid Approach to Identifying and Visualizing Distributed Knowledge Work Practices
Authors: Markus Strohmaier, Stefanie N. Lindstaedt
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Understanding collaborative work practices represents a critical factor in and a necessary fundament for the development of effective Computer Supported Collaborative Work (CSCW) systems. In today's economies, collaborative work is increasingly knowledge intensive, distributed and workers are more and more conceptualized as knowledge workers. This yields to the question how especially distributed knowledge work practices can be identified and visualized as a basis for the development of CSCW systems. This contribution 1) investigates how a traditional knowledge work analysis approach can be adapted for application in distributed settings and 2) reports on the preliminary findings of an explorative case study.
High quality signal reception in the presence of stationary interference-a blind signal separation approach
Authors: C. Garcia
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 02 (1999)

This paper considers the problem of interference rejection using a sensor array with application to enhance signal reception. In contrast to conventional adaptive beamforming which requires knowledge of the array geometry and array response, we propose a two stage blind signal separation approach to achieve interference rejection. The proposed method is based on the practically viable assumptions that the desired signal is temporally non-stationary and that interference is temporally second-order stationary, and is applicable to arrays with uncalibrated response and geometry. Real-world experimental results are presented to demonstrate the performance of the proposed method. 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
Network-based Home Range Analysis Using Delaunay Triangulation
Authors: Joni Downs, Mark Horner
Venue: Proceedings of the 4th International Symposium on Voronoi Diagrams in Science and Engineering (2007)

The home range is the fundamental measurement of fish and wildlife space-use patterns. Kernel density estimation (KDE) is the most widely applied home range estimator, although its poor performance has recently been documented. In this paper, we suggest that KDE is inappropriate for home range estimation, because it assumes Euclidean-based space usage. Because animal space-use patterns show characteristics of network-based movement, we develop a network-based home range estimator. First, we use Delaunay triangulation (DT) to approximate a network of travel paths from a set of animal point locations. Then, we adapt KDE to estimate home ranges as a function of that network. Preliminary results suggest that network-based home range estimation using DT has the potential to improve the way ecologists measure animal space-use patterns.
Improving the performance of organic thin-film transistor with a doped interlayer
Authors: Wei Hu, Yi Zhao, Chunsheng Ma, Jingying Hou, Shiyong Liu
Venue: Microelectronics Journal (2007)

Top contact organic thin-film transistors (TC OTFTs) based on pentacene are fabricated. For improving the contact characteristics between the organic semiconductor thin-film and gold electrodes, we doped the starburst molecular 4,4',4''-tris{N,(3-methylpheny)-N-phenylamino}-triphenylamine) (m-MTDATA), which is an excellent hole injection material for the organic light-emitting devices (OLEDs), into the interlayer contact with the electrodes. Compared with conventional TC OTFT, the performances of the organic transistor with the doped interlayer are improved. The field-effect mobility increases from 0.16 to 0.51cm^2/Vs, and threshold voltage downshifts from -11 to -2.8V for the linear region. The on/off current ratio is more than 10^4 when the gate voltage varies from 0 to -20V. We ascribe the improvements to the doped interlayer for which the contact resistance is reduced and the hole injection is enhanced.
Optimization of a noise reduction preprocessing in an acoustic echo and noise controller
Authors: B. Ayad
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 02 (1996)

In hands-free communications, the speech signal to be transmitted is disturbed by ambient noise and acoustic echo. So, processing to reduce these disturbances must be performed before transmission. Classical solutions are cascaded structures where the acoustic echo canceller precedes or follows the noise reduction system. We have proposed a new joint system where noise reduction preprocessing allows one to improve the performance of the acoustic echo canceller. This preprocessing reduces the noise but distorts the original echo. This paper presents an optimization of the preprocessing. Objective results in terms of the echo return loss enhancement and gain are presented.
Context-Dependent Access Control for Contextual Information
Authors: Christin Groba, Stephan Grob, Thomas Springer
Venue: Proceedings of the The Second International Conference on Availability, Reliability and Security (2007)

Following Mark Weiser's vision of ubiquitous computing and calm technology, computer systems should run in the background, preferably without the user noticing it at all. The gathering and disclosure of contextual information on the one hand enables the improvement of system behaviour towards a more autonomous and adaptive behaviour but on the other hand raises privacy issues by disclosing personal data. Thus, a major challenge in ubiquitous computing environments is achieving a good balance between convenience and control over personal data. In this paper we describe an access control mechanism for context data that enables the user to control his personal data in a convenient and non-intrusive way. The approach is based on existing role-based access control mechanisms but extends them as follows. Firstly, our approach is owner-centric, i.e. it is under control of each user, to whom his context is propagated throughout the system. Secondly, our approach does not only control the access to context data but also utilizes context information to simplify the management of these control mechanisms to make the handling of access control more convenient to the user. And thirdly, it introduces individual roles for each user and thus replaces the centrally defined role model of common rolebased access control by distinct models for each user. We have validated our approach based on an extended instant messaging system called Adaptive Multimedia Messenger, providing varying buddy information dependent on the access permission of the requesting user.
Animating dance
Authors: Tom Calvert
Venue: Proceedings of Graphics Interface 2007 (2007)

Since the inception of the field, researchers in human figure animation have had an active interchange with those interested in representing and visualizing dance. In 1967 A. Michael Noll at Bell Labs and Merce Cunningham, the father of modern dance speculated independently about the possibility of creating dancing stick figures on a computer display.
Evolution of Birdsong Syntax by Interjection Communication
Authors: Kazutoshi Sasahara, Takashi Ikegami
Venue: Artificial Life (2007)

Animals use diverse forms of communication, from sound signals to body postures. Recent ethological studies have reported a unique syntactic communication of a songbird, the Bengalese finch (Lonchura striata var. domestica). Male Bengalese finches sing complex courtship songs, which can be reconstructed by finite automata, and female Bengalese finches prefer complex songs, as opposed to monotonous or random ones. These facts suggest that the song syntaxes of male birds may have evolved as a result of sexual selection by female birds. Inspired by this hypothesis, we developed a communication model that is a system coupling different types of automaton, one for song production by males and another for song evaluation by females. We applied this model to study the evolution of syntactic animal communication in terms of the self-organization of coevolving automata. Three types of courting strategies as well as a relationship between the song syntax and female preference emerged. We argue that despite the simple communication involved, the complexity and diversity of song syntaxes can evolve via diverse female preferences.
Genetic algorithms applications in electrical distribution systems
Authors: D. M. Falcao
Venue: Proceedings of the Evolutionary Computation on 2002. CEC '02. Proceedings of the 2002 Congress - Volume 02 (2002)

This paper presents three GA applications in electrical distribution systems: network reconfiguration for loss reduction, optimal protection device placement, and prioritizing investments in distribution networks. The work reported in the paper is the result of research projects developed in cooperation with Brazilian electrical distribution utilities. The paper reports preliminary results of tests performed using actual networks.
Extended retiming: optimal scheduling via a graph-theoretical approach
Authors: T. W. O'Neil
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 04 (1999)

Many iterative or recursive applications commonly found in DSP and image processing applications can be represented by data-flow graphs (DFGs). This graph is then used to perform DFG scheduling, where the starting times for executing the application's individual tasks are determined. The minimum length of time required to execute all tasks once is called the schedule length of the DFG. A great deal of research has been done attempting to optimize such applications by applying various graph transformation techniques to the DFG in order to minimize this schedule length. One of the most effective of these techniques is retiming. We demonstrate that the traditional retiming technique does not always achieve optimal schedules and propose a new graph transformation technique, extended retiming, which will. We also present an algorithm for finding an extended retiming which transforms a DFG into one with minimal schedule length. Finally, we demonstrate a constant-time algorithm which verifies the existence of a retimed DFG with the minimum schedule length.
Fault Tolerance in Multiprocessor Systems Via Application Cloning
Authors: Philippe Bergheaud, Dinesh Subhraveti, Marc Vertes
Venue: Proceedings of the 27th International Conference on Distributed Computing Systems (2007)

Record and Replay (RR) is a software based state replication solution designed to support recording and subsequent replay of the execution of unmodified applications running on multiprocessor systems for fault-tolerance. Multiple instances of the application are simultaneously executed in separate virtualized environments called Containers. Containers facilitate state replication between the application instances by resolving the resource conflicts and providing a uniform view of the underlying operating system across all clones. The virtualization layer that creates the container abstraction actively monitors the primary instance of the application and synchronizes its state with that of the clones by transferring the necessary information to enforce identical state among them. In particular, we address the replication of relevant operating system state, such as network state to preserve network connections across failures, and the state that results from nondeterministic interleaved accesses to shared memory in SMP systems. We have implemented RR's state replication mechanisms in the Linux operating system by making novel use of existing features on the Intel and PowerPC architectures.