ppxscal/embedding_network huggingface dataset:
Progressive Image Transmission over Memoryless Feedback Channels Using Joint Source-Channel Coding Strategy
Authors: Xunfeng Yu, Dawei Ma
Venue: Proceedings of the First International Workshop on Knowledge Discovery and Data Mining (2008)

In this paper, we consider the problem of joint sourcechannel coding for image progressive transmitted over channels with feedback. Feedback routes are provided in many existing standard wireless channels, making rate allocation with feedback a problem of considerable practical importance. We address the question of rate allocation between the source and channel codes in the forward channel, in the presence of feedback information and under a distortion cost function. We show that the presence of feedback shifts the optimal rate allocation point, resulting higher rates for error-correcting codes and smaller overall distortion. Simulations on memoryless channels show that the presence of feedback allows up to about 1.5 dB improvement in PSNR compared to the similarly optimized feed forward scheme. Keywords: Bit allocation, feedback channels, image transmission, joint source-channel coding (JSCC)
A linear structured approach and a refined fitness function in genetic programming for multi-class object classification
Authors: Mengjie Zhang, Christopher Graeme Fogelberg, Yuejin Ma
Venue: Connection Science (2007)

This paper describes an approach to the use of genetic programming (GP) to multi-class object recognition problems. Rather than using the standard tree structures to represent evolved classifier programs which only produce a single output value that must be further translated into a set of class labels, this approach uses a linear structure to represent evolved programs, which use multiple target registers each for a single class. The simple error rate fitness function is refined and a new fitness function is introduced to approximate the true feature space of an object recognition problem. This approach is examined and compared with the tree based GP on three data sets providing object recognition problems of increasing difficulty. The results show that this approach outperforms the standard tree based GP approach on all the tasks investigated here and that the programs evolved by this approach are easier to interpret. The investigation into the extra target registers and program length results in heuristic guidelines for initially setting system parameters.
A Novel Analysis Model for DNA Sequences
Authors: Xianyang Jiang, Stephen S. -T. Yau
Venue: Proceedings of the 2008 International Conference on BioMedical Engineering and Informatics - Volume 01 (2008)

A novel analysis model for DNA sequence based on Stephen S. -T. Yau's method is presented. The model adopts a trigonometric function to represent the four nucleotides A, G, C, and T in a DNA sequence, and has some interesting characteristics. Basing on the characteristics, statistical experiments on human gene coding regions show high possibility of significant peak at the frequency k = N/3 in their spectrum with respect to our model. The experimental results demonstrate potential application of the model in coding region detection.
Design of a Ubiquitous System for Affective Bonding and Support within the Family
Authors: Sébastien Duval, Christian Hoareau, Hiromichi Hashizume
Venue: Proceedings of the 22nd International Conference on Advanced Information Networking and Applications - Workshops (2008)

We consider the design of a ubiquitous system that aims to strengthen affective bonds with, and to allow support for, family members, especially for distant relationships. It is based on wearable computers that evaluate emotions, health and activities, then transmit the information to authorized persons, and enable interactions. Our most significant contribution is to provide the design for an everyday life system that focuses on emotions, health and activities, and takes into account age specificities as well as emotional design.
Fast thermal nanoimprint lithography by a stamp with integrated heater
Authors: Massimo Tormen, Radu Malureanu, Rasmus Haugstrup Pedersen, Lasse Lorenzen, Kristian Hagsted Rasmussen, Christopher James Lüscher, Anders Kristensen, Ole Hansen
Venue: Microelectronic Engineering (2008)

We propose fast nanoimprinting lithography (NIL) process based on the use of stamps with integrated heater. The latter consists of heavily ion implantation n-type doped silicon layer buried below the microstructured surface of the stamp. The stamp is heated by Joule effect, by 50@ms 25Hz repetition rate current pulses flowing in the conductive layer. Using this approach we have reproducibly imprinted areas of ~2cm^2 within 16s with residual layers in the range of few tens of nm. This result paves the way for processes in the sub-1s timescale over large area surfaces.
New Hurdles for Vulnerability Disclosure
Authors: David McKinney
Venue: IEEE Security and Privacy (2008)

Vulnerability disclosure is an important part of information security. In recent years, vulnerabilities in specific Web sites and SCADA implementations have created new hurdles for vulnerability disclosure. These aspects of information security have different risks and benefits to the involved stakeholders, which has prevented the establishment of an ideal environment for vulnerability disclosure.
An analysis of linear models, linear value-function approximation, and feature selection for reinforcement learning
Authors: Ronald Parr, Lihong Li, Gavin Taylor, Christopher Painter-Wakefield, Michael L. Littman
Venue: Proceedings of the 25th international conference on Machine learning (2008)

We show that linear value-function approximation is equivalent to a form of linear model approximation. We then derive a relationship between the model-approximation error and the Bellman error, and show how this relationship can guide feature selection for model improvement and/or value-function improvement. We also show how these results give insight into the behavior of existing feature-selection algorithms.
UMVU estimation of the ratio of powers of normal generalized variances under correlation
Authors: George Iliopoulos
Venue: Journal of Multivariate Analysis (2008)

We consider estimation of the ratio of arbitrary powers of two normal generalized variances based on two correlated random samples. First, the result of Iliopoulos [Decision theoretic estimation of the ratio of variances in a bivariate normal distribution, Ann. Inst. Statist. Math. 53 (2001) 436-446] on UMVU estimation of the ratio of variances in a bivariate normal distribution is extended to the case of the ratio of any powers of the two variances. Motivated by these estimators' forms we derive the UMVU estimator in the multivariate case. We show that it is proportional to the ratio of the corresponding powers of the two sample generalized variances multiplied by a function of the sample canonical correlations. The mean squared errors of the derived UMVU estimator and the maximum likelihood estimator are compared via simulation for some special cases.
A characterization of the natural embedding of the split Cayley hexagon H(q) in PG(6,q) by intersection numbers
Authors: Joseph A. Thas, Hendrik Van Maldeghem
Venue: European Journal of Combinatorics (2008)

In this paper, we prove that a set L of q^5+q^4+q^3+q^2+q+1 lines of PG(6,q) with the properties that (1) every point of PG(6,q) is incident with either 0 or q+1 elements of L, (2) every plane of PG(6,q) is incident with either 0, 1 or q+1 elements of L, (3) every solid of PG(6,q) is incident with either 0, 1, q+1 or 2q+1 elements of L, and (4) every hyperplane of PG(6,q) is incident with at most q^3+3q^2+3q members of L, is necessarily the set of lines of a regularly embedded split Cayley generalized hexagon H(q) in PG(6,q).
Fault-Based Web Services Testing
Authors: Samer Hanna, Malcolm Munro
Venue: Proceedings of the Fifth International Conference on Information Technology: New Generations (2008)

Web services are considered a new paradigm for building software applications that has many advantages over the previous paradigms; however, Web services are still not widely used because Service Requesters do not trust Web Services that were built by others. Testing can participate in solving this problem because it can be used to assess the quality attributes of Web Services and hence increase the requesters’ trustworthiness. This paper proposes an approach that can be used to test the robustness and other related attribute of Web Services, and that can be easily enhanced to assess other quality attributes. The framework is based on rules for test case generation that are designed by, firstly, analyzing WSDL document to know what faults could affect the robustness quality attribute of Web Services, and secondly, using the fault-based testing techniques to detect such faults. A proof of concept tool that depends on these rules has been implemented in order to assess the usefulness of the rules in detecting robustness faults in different Web Services platforms.
Group Independent Component Analysis of Multi-subject fMRI Data: Connections and Distinctions between Two Methods
Authors: Ying Guo
Venue: Proceedings of the 2008 International Conference on BioMedical Engineering and Informatics - Volume 02 (2008)

Independent component analysis (ICA) has been successfully applied for single-subject functional Magnetic Resonance Imaging (fMRI) analysis. The extension of ICA for group inferences remains an active research topic. We consider two popular group ICA methods for multi-subject fMRI data: GIFT and tensor PICA. Both models assume statistical independence in the spatial source signals in the brain. The two methods differ in terms of the assumed structure of the group spatio-temporal process. Their estimation and inference procedures are also different and tailored specifically for the assumed model structure. To understand the relative effectiveness of the two methods under various scenarios, we generate multi-subject fMRI data to compare the performance the two methods under varying types of between-subject variability. The simulation results show that both methods have high accuracy when the data were generated from the trilinear model[1]. When the underlying model deviates from the trilinear model, GIFT tends to be more robust than the tensor PICA. We reveal the connection between the two methods by introducing a class of group ICA models. We show that GIFT (Calhoun et al., 2001. Hum Brain Mapp, 14: 140-151) and tensor PICA (Beckmann and Smith, 2005. NeuroImage, 25: 294-311) are special cases in this class of models when assuming different model structures.
Local and global connotations in sonic composition
Authors: Fabio Cifariello ciardi
Venue: Organised Sound (2008)

An aspect of the local/global binarism in music regards the cultural identity of the sounds, musical styles and grammars of a composition. This article intends to explore the role of the local/global issue in the context of the semantic dimension of sounds, both during the composition of a musical piece and during its reception. In the first part of the article the local or global identity of a sonic event will be examined from two different perspectives: on the one hand that of the composer, starting from his or her attitudes with regard to the semantic aspects of the sonic material and the compositional processes used; on the other hand that of the listener, starting from the cognitive processes (s)he activates in the search for a musical and an extramusical meaning. Based on this analysis, in the second part of the article the usefulness of describing the cultural identity of a sonic event and more generally its semantic dimensions in terms of ‘shared connotations’ will be explored. Finally, some of the interactions between connoted sonic events will be analysed, mainly focusing on global and local cultural identities.
Classification of face images using local iterated function systems
Authors: A. Z. Kouzani
Venue: Machine Vision and Applications (2008)

There has been an increasing interest in face recognition in recent years. Many recognition methods have been developed so far, some very encouraging. A key remaining issue is the existence of variations in the input face image. Today, methods exist that can handle specific image variations. But we are yet to see methods that can be used more effectively in unconstrained situations. This paper presents a method that can handle partial translation, rotation, or scale variations in the input face image. The principal is to automatically identify objects within images using their partial self-similarities. The paper presents two recognition methods which can be used to recognise objects within images. A face recognition system is then presented that is insensitive to limited translation, rotation, or scale variations in the input face image. The performance of the system is evaluated through four experiments. The results show that the system achieves higher recognition rates than those of a number of existing approaches.
Note: Two classes of hyperplanes of dual polar spaces without subquadrangular quads
Authors: Bart De Bruyn
Venue: Journal of Combinatorial Theory Series A (2008)

Let @P be one of the following polar spaces: (i) a nondegenerate polar space of rank n-1>=2 which is embedded as a hyperplane in Q(2n,K); (ii) a nondegenerate polar space of rank n>=2 which contains Q(2n,K) as a hyperplane. Let @D and DQ(2n,K) denote the dual polar spaces associated with @P and Q(2n,K), respectively. We show that every locally singular hyperplane of DQ(2n,K) gives rise to a hyperplane of @D without subquadrangular quads. Suppose @P is associated with a nonsingular quadric Q^-(2n+@e,K) of PG(2n+@e,K), @e@?{-1,1}, described by a quadratic form of Witt-index n+@e-12, which becomes a quadratic form of Witt-index n+@e+12 when regarded over a quadratic Galois extension of K. Then we show that the constructed hyperplanes of @D arise from embedding.
An Asynchronous Circuit Design with Fast Forwarding Technique at Advanced Technology Node
Authors: Chin-Khai Tang, Chun-Yen Lin, Yi-Chang Lu
Venue: Proceedings of the 9th international symposium on Quality Electronic Design (2008)

In this paper, a new asynchronous circuit design is presented. A special technique that enables fast forwarding is applied to the circuits, and the forward transition improves to less than 2. The handshaking process and cycle time of the asynchronous circuits are analyzed, and its performance and functionality under fabrication and temperature variations are evaluated through Monte Carlo simulations in 65nm technology. The proposed asynchronous circuits are compared to the static and domino logic circuits to assess their delay variations and functional success rates.
The effects of CD-ROM storybook reading on low SES kindergarteners' emergent literacy as a function of learning context
Authors: Adina Shamir, Ofra Korat, Nili Barbi
Venue: Computers Education (2008)

We investigated the effects of a highly rated commercial electronic book (e-book) for young children on kindergarteners' emergent literacy skills within the context of paired peer versus individual use of the e-book. The sample of 110 kindergarteners had a mean age of 5.64 years and approximately equal numbers of boys and girls, randomly chosen from four kindergartens in a low SES Israeli township. All participants spoke Hebrew. None had been diagnosed with learning disabilities. Participants were randomly assigned to four groups: 30 tutors, 30 tutees, and 30 individual learners, all of whom used the e-book, and 20 children in a control group who were only exposed to their regular kindergarten program. Pre- and post-intervention emergent literacy measures included phonological awareness, reading of words from the e-book, word recognition, and story comprehension and production. The overall improvement in the measured emergent literacy skills from pre- to post-intervention of the children in the three experimental groups was higher than that of the children in the control group. In addition, there were significant learning context differences in several of the children's measured emergent literacy skills, suggesting that those who work on an e-book activity in a paired peer learning context with same age peers (tutors and tutees) seem to gain an advantage in phonological awareness, emergent reading, and story comprehension over those who work with it individually. Implications for educators and e-book designers are discussed.
Optimal Force Generation in Parallel Manipulators for Passing through the Singular Positions
Authors: Sébastien Briot, Vigen Arakelian
Venue: International Journal of Robotics Research (2008)

It is known that a parallel manipulator at a singular configuration can gain one or more degrees of freedom and become uncontrollable, that is, it might not reproduce a stable motion along a prescribed trajectory. However, it is proved experimentally that there is possible passing through the singular zones. This was simulated and shown through numerical examples and illustrated on several parallel structures. In this paper, we determine the optimal dynamic conditions generating a stable motion inside the singular zones. The obtained results show that the general condition for passing through a singularity can be defined as follows: the end-effector of the parallel manipulator can pass through the singular positions without perturbation of motion if the wrench applied on the end-effector by the legs and external efforts of the manipulator are orthogonal to the twist along the direction of the uncontrollable motion. This condition is obtained from the tion of the uncontrollable motion. This condition is obtained from the inverse dynamics and analytically demonstrated by the study of the Lagrangian of a general parallel manipulator. Numerical simulations are carried out using the software ADAMS and validated through experimental tests.
Variability Analysis for sub-100nm PD/SOI Sense-Amplifier
Authors: Saibal Mukhopadhyay, Rajiv V. Joshi, Keunwoo Kim, Ching-Te Chuang
Venue: Proceedings of the 9th international symposium on Quality Electronic Design (2008)

In this paper we perform a comprehensive analysis of the robustness of PD/SOI sense amplifiers considering floating body effect and random dopant fluctuation effect. Our analysis shows that, minimization of effects of floating body and random dopant fluctuations impose conflicting sizing requirements for different transistors in a sense amplifier. We develop a methodology for sizing of different devices to minimize the input offset voltage of sense amplifier. The proposed analysis and sizing methodology improve the robustness of PD/SOI sense amplifiers and can better exploit the performance advantages of PD/SOI technology.
A survey of soft skill simulation authoring tools
Authors: Conor Gaffney, Declan Dagger, Vincent Wade
Venue: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia (2008)

Soft skill simulations are a convenient and efficient means of delivering engaging educational experiences [1]. Typically these simulations combine hypertext and media files to create a realistic model of real world social situations. However the key impediment to online simulations being adopted as a mainstream approach to teaching soft skills is the complexity involved in their authoring. This paper presents a state of the art survey of existing authoring tools used to compose online soft skill simulations.
On application of directons to functional classification of genes in prokaryotes
Authors: Hongwei Wu, Fenglou Mao, Victor Olman, Ying Xu
Venue: Computational Biology and Chemistry (2008)

Functional classification of genes represents one of the most basic problems in genome analysis and annotation. Our analysis of some of the popular methods for functional classification of genes shows that these methods are not always consistent with each other and may not be specific enough for high-resolution gene functional annotations. We have developed a method to integrate genomic neighborhood information of genes with their sequence similarity information for the functional classification of prokaryotic genes. The application of our method to 93 proteobacterial genomes has shown that (i) the genomic neighborhoods are much more conserved across prokaryotic genomes than expected by chance, and such conservation can be utilized to improve functional classification of genes; (ii) while our method is consistent with the existing popular schemes as much as they are among themselves, it does provide functional classification at higher resolution and hence allows functional assignments of (new) genes at a more specific level; and (iii) our method is fairly stable when being applied to different genomes.
A Revised Taxonomy of Data Collection Mechanisms with a Focus on Intrusion Detection
Authors: Ulf Larson, Erland Jonsson, Stefan Lindskog
Venue: Proceedings of the 2008 Third International Conference on Availability, Reliability and Security (2008)

Surprisingly few data collection mechanisms have been used for intrusion detection, and most systems rely on network and system call data as input to the detection engine. Even though the quality of log data is vital to the detection process and heavily dependent on the collection mechanism, no extensive survey or taxonomy has beenconducted within the detection field. In this paper, we propose a revised taxonomy which provides a unified terminology and a framework in which data collection mechanisms can be systematically inspected, evaluated, and compared. Since the taxonomy is derived from existing mechanisms, it also provides a useful overview of different types of mechanisms. The paper also suggests areas within data collection where additional work is required.
Reconciling privacy and security in pervasive computing: the case for pseudonymous group membership
Authors: Ian Wakeman, Dan Chalmers, Michael Fry
Venue: Proceedings of the 5th international workshop on Middleware for pervasive and ad-hoc computing: held at the ACM/IFIP/USENIX 8th International Middleware Conference (2007)

In this paper, we outline an approach to the identification of entities for access control that is based on the membership of groups, rather than individuals. By using group membership as a level of indirection between the individual and the system, we can increase privacy and provide incentives for better behaviour. Privacy comes from the use of pseudonyms generated within the group and which can be authenticated as belonging to the group. The incentives for better behaviour come from the continuous nature of groups - members may come and go, but the group lives on, and groups are organised so as to ensure group-longevity, and prevent actions which may harm the group's reputation. We present a novel pseudonym generation mechanism suitable for use in groups without a centralised administration. Finally, we argue that the use of group membership as the basis for formulating policies on interaction is more efficient for disconnected operation, facilitating proxies and the efficient storage of revoked membership and distrusted organisations within bloom filters for small memory footprints.
IT governance for enterprise resource planning supported by the DeLone-McLean model of information systems success
Authors: Edward W. N. Bernroider
Venue: Information and Management (2008)

I investigated the role of IT governance in driving the success of ERP projects. The tool for assessing ERP value was a comprehensive, multivariate and validated model adapted from the widely used Delone and McLean model of IS success. This showed that ERP investments were more effective in organizations having an IT governance domain consisting of proactive strategic guidance and participatory team building. Large enterprises, however, under-performed compared to SMEs and needed specific performance drivers, such as top management commitment to become effective.