ppxscal/embedding_network huggingface dataset:
A convex formulation for learning shared structures from multiple tasks
Authors: Jianhui Chen, Lei Tang, Jun Liu, Jieping Ye
Venue: Proceedings of the 26th Annual International Conference on Machine Learning (2009)

Multi-task learning (MTL) aims to improve generalization performance by learning multiple related tasks simultaneously. In this paper, we consider the problem of learning shared structures from multiple related tasks. We present an improved formulation (iASO) for multi-task learning based on the non-convex alternating structure optimization (ASO) algorithm, in which all tasks are related by a shared feature representation. We convert iASO, a non-convex formulation, into a relaxed convex one, which is, however, not scalable to large data sets due to its complex constraints. We propose an alternating optimization (cASO) algorithm which solves the convex relaxation efficiently, and further show that cASO converges to a global optimum. In addition, we present a theoretical condition, under which cASO can find a globally optimal solution to iASO. Experiments on several benchmark data sets confirm our theoretical analysis.
Virtual Draw: Drawing system in the 3D virtual space
Authors: Kunio Sakamoto, Hironobu Nakayama, Shoto Taneji
Venue: Proceeding of the 2006 conference on Advances in Intelligent IT: Active Media Technology 2006 (2006)

We developed interaction media systems in the 3D virtual space. In these systems, the artist draws a picture or the performer plays a show using the virtual character such as a puppet. This interactive virtual media system consists of the image capture, measuring performer's position, detecting and recognizing motions and synthesizing video image using the personal computer. In this paper, we describe the applications of 3D virtual space; a virtual drawing and superimposing CG character.
The framenet model and its applications†
Authors: Birte LÖnneker-rodman, Collin f. Baker
Venue: Natural Language Engineering (2009)

The FrameNet database comprises an English lexicon, organized in terms of semantic frames. Frames describe situations or entities, along with their participants and props, termed frame elements. The frames are organized in an ontology-like network. For the lexical units, corpus annotations illustrate which frame elements are typically realized, and how they behave syntactically. Texts where all content words are annotated with FrameNet information offer a detailed, structured semantic representation with a variety of uses in Natural Language Processing applications, in particular in retrieving and meaningfully organizing texts written by humans, or in making human–computer interaction more natural. Also, the FrameNet English lexicon can be replaced by lexical data from other languages, while maintaining frame information, so the model is attractive for cross-lingual resources and applications. Manual annotation produced by FrameNet and similar projects for other languages is used to train automatic frame semantic annotation systems, which add rich semantic information to any type of text, and are important components for more sophisticated semantic processing applications.
Manifold Learning for Gender Classification from Face Sequences
Authors: Abdenour Hadid, Matti Pietikäinen
Venue: Proceedings of the Third International Conference on Advances in Biometrics (2009)

We propose a novel approach to gender recognition for cases when face sequences are available. Such scenarios are commonly encountered in many applications such as human-computer interaction and visual surveillance in which input data generally consists of video sequences. Instead of treating each facial image as an isolated pattern and then combining the results (at feature, decision or score levels) as generally done in previous works, we propose to exploit the correlation between the face images and look at the problem of gender classification from manifold learning point of view. Our approach consists of first learning and discovering the hidden low-dimensional structure of male and female manifolds using an extension to the Locally Linear Embedding algorithm. Then, a target face sequence is projected into both manifolds for determining the gender of the person in the sequence. The matching is achieved using a new manifold distance measure. Extensive experiments on a large set of face sequences and different image resolutions showed very promising results, outperforming many traditional approaches.
Efficient Robust Private Set Intersection
Authors: Dana Dachman-Soled, Tal Malkin, Mariana Raykova, Moti Yung
Venue: Proceedings of the 7th International Conference on Applied Cryptography and Network Security (2009)

Computing Set Intersection privately and efficiently between two mutually mistrusting parties is an important basic procedure in the area of private data mining. Assuring robustness, namely, coping with potentially arbitrarily misbehaving (i.e., malicious) parties, while retaining protocol efficiency (rather than employing costly generic techniques) is an open problem. In this work the first solution to this problem is presented.
Numerical simulation of interaction between turbulent flow and a vibrating airfoil
Authors: Lenka Dubcov&#x00e1;, Miloslav Feistauer, Jarom&#x00ed;r Hor&#x00e1;&#x010d;ek, Petr Sv&#x00e1;&#x010d;ek
Venue: Computing and Visualization in Science (2009)

The subject of this paper is the numerical simulation of the interaction of two-dimensional incompressible viscous flow and a vibrating airfoil. A solid elastically supported airfoil with two degrees of freedom, which can rotate around the elastic axis and oscillate in the vertical direction, is considered. The numerical simulation consists of the stabilized finite element treatment of the Reynolds averaged Navier&#x2013;Stokes (RANS) approach, the use of turbulence models and the solution of the system of ordinary differential equations describing the airfoil motion. The time dependent computational domain and a moving grid are taken into account with the aid of the Arbitrary Lagrangian&#x2013;Eulerian (ALE) formulation of the Navier&#x2013;Stokes equations. High Reynolds numbers up to 106 require to use a suitable stabilization of the finite element discretization and the application of a turbulence model. We apply the algebraic turbulence model, which was designed by Baldwin and Lomax and modified by Rostand. The developed technique was tested by the simulation of flow past a flat rigid plate and the computation of pressure distribution around a rotating airfoil with prescribed motion. Finally, the method was applied to the simulation of flow induced airfoil vibrations.
Hierarchical explanation of inference in Bayesian networks that represent a population of independent agents
Authors: Peter Šutovský, Gregory F. Cooper
Venue: Proceeding of the 2008 conference on ECAI 2008: 18th European Conference on Artificial Intelligence (2008)

This paper describes a novel method for explaining Bayesian network (BN) inference when the network is modeling a population of conditionally independent agents, each of which is modeled as a subnetwork. For example, consider disease-outbreak detection, in which the agents are patients who are modeled as independent, conditioned on the factors that cause disease spread. Given evidence about these patients, such as their symptoms, suppose that the BN system infers that a respiratory anthrax outbreak is highly likely. A public-health official who received such a report would generally want to know why anthrax is being given a high posterior probability. This paper describes the design of a system that explains such inferences. The explanation approach is applicable in general to inference in BNs that model conditionally independent agents; it complements previous approaches for explaining inference on BNs that model a single agent (e.g., explaining the diagnostic inference for a single patient using a BN that models just that patient).
A Simple Quantitative Model of AVC/H.264 Video Coders
Authors: Tomasz Grajek, Marek Domański
Venue: Proceedings of the International Conference on Computer Vision and Graphics: Revised Papers (2008)

The paper describes a simple quantitative model of AVC/ H.264 coders. The model defines the relationship between the bitstream and the quantization step (Qstep) for I- and P-frames. The whole allowed range of Qstep values has been divided into 3 intervals. In 1st and 3rd interval, the proposed model has only one parameter that depends on sequence content, whereas in 2nd interval the proposed model has three parameters that depend on sequence content. The experiments have been conducted on 4CIF sequences and showed that proposed model fits experimental data very well in all intervals.
A market-inspired approach to reservation-based urban road traffic management
Authors: Matteo Vasirani, Sascha Ossowski
Venue: Proceedings of The 8th International Conference on Autonomous Agents and Multiagent Systems - Volume 1 (2009)

Urban road traffic management is an example of a socially relevant problem that can be modelled as a large-scale, open, distributed system, composed of many autonomous interacting agents, which need to be controlled in a decentralized manner. Most models for urban road traffic management rely on control elements that act on traffic flows. Dresner and Stone have put forward the idea of an advanced urban road traffic infrastructure that allows for cars to individually reserve space and time at an intersection so as to be able to safely cross it. In this paper we extend Dresner and Stone's approach to networks of intersections. For this purpose, we draw upon market-inspired control methods as a paradigm for urban road traffic management. We conceive the system as a computational economy, where driver agents trade with infrastructure agents in a virtual marketplace, purchasing reservations to cross intersections when commuting through the city. We show that in situations of similar traffic load, an increase of the infrastructure's monetary benefit usually implies a decrease of the drivers' average travel times.
Forming Buyer Coalitions with Bundles of Items
Authors: Laor Boongasame, Ho-Fung Leung, Veera Boonjing, Dickson K. Chiu
Venue: Proceedings of the Third KES International Symposium on Agent and Multi-Agent Systems: Technologies and Applications (2009)

There are several existing buyer coalition schemes, but they do not consider bundles of items. This research presents an algorithm for forming a buyer coalition with bundles of items, called the GroupBuyPackage scheme, in order to maximize the total discount. Our simulation results show that the total discount of the coalitions in this scheme are close to that in the optimal scheme.
Sixearch.org 2.0 peer application for collaborative web search
Authors: Namrata Lele, Le-Shin Wu, Ruj Akavipat, Filippo Menczer
Venue: Proceedings of the 20th ACM conference on Hypertext and hypermedia (2009)

Sixearch.org is a peer application for social, distributed, adaptive Web search, which integrates the Sixearch.org protocol, a topical crawler, a document indexing system, a retrieval engine, a P2P network communication system, and a contextual learning system. With a single click, the Sixearch.org application will build your personal Web collection. You can search not only your collection, but also other Sixearch peers. When you submit a query, your Sixearch agent will determine which peers are best suited to answer it based on previous interactions. Your agent will also learn from the results it receives, so that it can continuously improve.
Dynamic VO Establishment in Distributed Heterogeneous Business Environments
Authors: Bartosz Kryza, Lukasz Dutka, Renata Slota, Jacek Kitowski
Venue: Proceedings of the 9th International Conference on Computational Science (2009)

As modern SOA and Grid infrastructures are being moved from academic and research environments to more challenging business and commercial applications, such issue as control of resource sharing become of crucial importance. In order to manage and share resources within distributed environments the idea of Virtual Organizations (VO) emerged, which enables sharing only subsets of resources among partners of such a VO within potentially larger settings. This paper describes the Framework for Intelligent Virtual Organizations (FiVO), focusing on its functionality of enforcing security (Authentication and Authorization) in dynamically deployed Virtual Organizations. The paper presents the overall architecture of the framework along with different security settings which FiVO can support within one Virtual Organization.
Aspects, Dependencies and Interactions
Authors: Frans Sanen, Katharina Mehner, Ruzanna Chitchyan, Lodewijk Bergmans, Johan Fabry, Mario Sudholt
Venue: Object-Oriented Technology. ECOOP 2008 Workshop Reader: ECOOP 2008 Workshops Paphos, Cyprus, July 7-11, 2008 Final Reports (2008)

The topics on aspects, dependencies and interactions are among the key remaining challenges to be tackled by the Aspect-Oriented Software Development (AOSD) community to enable a wide adoption of AOSD technology. This third workshop, organized and supported by the AOSD-Europe project, aimed to continue the wide discussion on aspects, dependencies and interactions started at ADI 2006 and continued at ADI 2007.
Evaluation of a simulation model in predicting the drying parameters for deep-bed paddy drying
Authors: Dariush Zare, Guangnan Chen
Venue: Computers and Electronics in Agriculture (2009)

A simulation model for deep-bed batch drying of paddy was developed to predict the profiles of grain moisture content, grain temperature, air temperature and air humidity during the drying process. In order to evaluate the validity of this model, a laboratory-scale deep-bed batch dryer was designed and fabricated. Comprehensive drying experiments were carried out in three replications under different drying conditions with two independent drying variables, namely, drying air temperature (at two levels of 45 and 50^oC) and air mass flow rate (at three levels of 0.1, 0.16 and 0.22kgm^-^2s^-^1). Good agreement was found between the simulation results and the experimental data. After validation of the model, the dryer performance was optimized by minimizing specific energy consumption under identical moisture removal using the simulation model. Based on this criterion, the treatment with mass flow rate of 0.03kgm^-^2s^-^1 and air temperature of 35^oC was found to be the optimal drying condition.
Comparison of standard and modified recursive state estimation techniques for nonlinear systems
Authors: Alexandros C. Charalampidis, George P. Papavassilopoulos
Venue: Proceedings of the 2009 17th Mediterranean Conference on Control and Automation (2009)

This paper deals with recursive state estimation for nonlinear systems. A new set of σ-points for the Unscented Kalman Filter is proposed as well as a way to substitute a nonlinear output with a linear one. The importance of the function of the state which must be estimated is also illustrated and the need for taking it into account when designing the state estimator. All the proposed methods are compared with standard Extended Kalman Filter, Unscented Kalman Filter and Particle Filter with Sampling Importance Resampling using simulations. The results show that the modifications proposed in some cases lead to considerable reduction in estimation error.
Single camera three-dimensional gaze determination
Authors: Richard A. Volz
Venue:  (2007)

In this dissertation, a new approach for determining gaze direction is presented. This approach is based on the existence of a visual axes center for the human eye, the location of which is invariant with respect to the head. The vector from the visual axes center of an eye through the pupil center provides a reliable approximation for a gaze vector. Calibration camera images of human subjects looking at known points on a computer monitor are collected in a non-intrusive manner. Algorithms are applied to the images from two independent cameras whose spatial relationship is known with respect to the monitor. The calibration algorithms allow determination of physical distances between selected facial features visible in the images and the invariant location of the visual axes center for each eye (not visible) with respect to these features. Given these invariant relationships between a subject's facial features and eye visual axes centers, optimization techniques are applied to subsequent images collected from a single camera to obtain the three-dimensional locations of the visible facial features and the visual axes centers, and from these, the gaze direction. The results of experiments conducted to determine the viability and accuracy of the visual axes center approach in determining the gaze direction are presented. The results show that the approach can provide acceptable gaze direction error values when high accuracy (< 1&deg; angular error) is not required. Techniques to improve accuracy are discussed as well as potential limitations of the approach.
Measuring web feature impacts in Peer-to-Peer file sharing systems
Authors: Sirui Yang, Hai Jin, Bo Li, Xiaofei Liao, Hong Yao, Qi Huang, Xuping Tu
Venue: Computer Communications (2009)

In Peer-to-Peer (P2P) file sharing systems, the presentation of resource attributes organized in different web features can influence users' selection. However, this has been only qualitatively speculated without concrete analysis. In this paper, we conduct extensive quantitative measurements on the impacts of these attributes by crawling web pages of a BitTorrent site, ''5QZone''. The measurement lasts for 31 days, and 168,610 records containing 11,228 distinct resources have been collected. We further compare it with one-day commercial measurement data from a hybrid file sharing site, ''Xunlei'', which contains 5,473,283 resources for 5,156,696 participating users. The finding is twofold. On one hand, it confirms the above qualitative speculation; on the other hand, it shows more significant results: (1) with the highlight feature on popular items, the downloads of each resource yield to a long-tail distribution, deviated from Zipf Law; (2) publications with attracting titles disseminate substantially faster than others; (3) publisher authority feature has limited influence on depressing low quality resources; (4) other features such as presenting resource categories and sizes also affect user behavior. We further demonstrate the implications of the web feature impact for system design and potential attackers.
Virtual experiments: Combining realistic neutron scattering instrument and sample simulations
Authors: E. Farhi, V. Hugouvieux, M. R. Johnson, W. Kob
Venue: Journal of Computational Physics (2009)

A new sample component is presented for the Monte Carlo, ray-tracing program, McStas, which is widely used to simulate neutron scattering instruments. The new component allows the sample to be described by its material dynamic structure factor, which is separated into coherent and incoherent contributions. The effects of absorption and multiple scattering are treated and results from simulations and previous experiments are compared. The sample component can also be used to treat any scattering material which may be close to the sample and therefore contaminates the total, measured signal.
Performance and reliability of advanced High-K/Metal gate stacks (Invited Paper)
Authors: X. Garros, M. Casse, G. Reimbold, M. Rafik, F. Martin, F. Andrieu, V. Cosnier, F. Boulanger
Venue: Microelectronic Engineering (2009)

This paper provides a systematic study of mobility performance and Bias Temperature Instabilities (BTI) reliability in advanced dielectrics stacks. By studying a large variety of dielectric stacks we clearly demonstrate that mobility performance, interface defects Nit and Negative BTI reliability are strongly correlated. All are affected by nitrogen species N which is clearly identified as the main mobility killer when it reaches unintentionally the Si interface during the deposition of nitrided gates or the nitridation steps.
Plenary lecture VIII: mathematical models of grippers
Authors: Ion Simionescu
Venue: Proceedings of the 10th WSEAS international conference on Mathematical and computational methods in science and engineering (2008)

In robotics technology, the groups belong to the functional units have the greatest variety of design. This is due to the fact, although the robot is a flexible machine, the gripper performs a much more tasks. Nevertheless, these tasks are not limited to prehension only which is why the more generic term end - effector is often used. Many grippers are used in the loading of the manufacturing lines, in packaging and storage as well as the handling of objects in laboratory test and inspection systems. Grippers constitute the end of the kinematic chain in the joint systems of the industrial robots, and facilitate interaction with the work environment. Although universal grippers with large holding can be used for diverse work piece shapes, in many cases they must be adapted to the specific work piece shapes. On the whole, there are many types of grippers. Each of these is specialized in holding of a certain shape of the work piece. Unfortunately, there are few types of universal grippers, which can not grasp any object. In this way it is necessary that a single gripper to grasp work pieces with different dimensions. The most work pieces are cylindrical ones. If the robot handle the cylindrical work piece with various diameters, it is necessary that all pieces to be fixed with their axes in the same position. The self centering grippers can have two or three fingers. They are commonly used for the handling of cylindrical work piece in loading and mounting operations. The fingers may have the rotational or translational movements. If the gripper has two fingers with rotational movements, the active surfaces of the jaws are noncircular shapes. The jaws of the grippers with three fingers have the plane or circular cylindrical shapes, but the driving system has a cam with translational movement. In the work, some considerations with regard to design of the self centering grippers used to handle the work piece with cylindrical shape are presented.
SAMBA-bus: A high performance bus architecture for system-on-chips
Authors: Ruibing Lu, Aiqun Cao, Cheng-Kok Koh
Venue: IEEE Transactions on Very Large Scale Integration (VLSI) Systems (2007)

A high performance communication architecture, SAMBA-bus, is proposed in this paper. In SAMBA-bus architecture, multiple compatible bus transactions can be performed simultaneously with only a single bus access grant from the bus arbiter. Experimental results show that, compared with a traditional bus architecture, the SAMBA-bus architecture can have up to 3.5 times improvement in the effective bandwidth, and up to 15 times reduction in the average communication latency. In addition, the performance of SAMBA-bus architecture is affected only slightly by arbitration latency, because bus transactions can be performed without waiting for the bus access grant from the arbiter. This feature is desirable in SoC designs with large numbers of modules and long communication delay between modules and the bus arbiter.