ppxscal/embedding_network huggingface dataset:
Semantic Mapping of Image Databases using Perceptual Similarity
Authors: Christos Theoharatos, George Economou, Spiros Fotopoulos
Venue: Proceedings of the Eight International Workshop on Image Analysis for Multimedia Interactive Services (2007)

Semantic mapping of image databases is explored based on a human-centered approach for judging visual similarity. The management is pursued using a standard psychophysical experiment followed by a well-suited data analysis methodology. The end-result is a cognitive discriminative biplot, which is a visualization of the intrinsic organization of the image database best reflecting the user's perception. The discriminating power of the introduced biplot constitutes it an appealing tool for image retrieval and a flexible interface for visual data mining tasks.
Motion-driven object segmentation in scale-space
Authors: E. M. Izquierdo
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 06 (1999)

In this paper we present a method for motion segmentation, in which accurate grouping of pixels undergoing the same motion is targeted. In the presented technique true object edges are first obtained by combining anisotropic diffusion of the original image with edge detection and contour reconstruction in the inherent scale-space. Contours are then matched according to the distance given by a metric defined on their polygonal approximations and the shape of the one-dimensional intensity function along the contour. Masks of objects are obtained by merging image areas inside of edges having the same motion. The performance of the presented technique has been evaluated by computer simulations.
Algorithms for the calculation of exact displacements, strains, and stresses for triangular dislocation elements in a uniform elastic half space
Authors: Brendan J. Meade
Venue: Computers Geosciences (2007)

We present algorithms for analytically calculating the displacements, strains, and stresses associated with slip on a triangular dislocation element (TDE) in a homogeneous elastic half space. Following previous efforts, the solution is constructed as a dislocation loop where the deformation fields for each of the three triangle legs are calculated by the superposition of two angular dislocations. In addition to the displacements at the surface we derive the displacements and strains at arbitrary depth. We give explicit formulas for the strains due to slip on an angular dislocation, the calculation of angular dislocation slip components, a method for identifying observation coordinates affected by a solid body translation, and rules for internally consistent vertex ordering allowing for the superposition of multiple TDEs. Examples of surface displacements and internal stresses are given and compared with rectangular representations of geometrically complex fault surfaces.
Performance of a Globally-Clocked Parallel Simulator
Authors: Gregory D. Peterson, Roger D. Chamberlain
Venue: Proceedings of the 1993 International Conference on Parallel Processing - Volume 03 (1993)

A performance model for a globally-clocked, discrete-event queueing network simulator is developed and validated against measured results. The use of architectural enhancements for improving the performance of the algorithm is investigated. Both scaled and fixed problem sizes are investigated, with a maximum measured scaled speedup of 47 and 64 processors. The model is very accurate, predicting runtime within 5% of measured results.
Polygon visibility ordering via Voronoi diagrams
Authors: Shinichi Fukushige, Hiromasa Suzuki
Venue: The Visual Computer: International Journal of Computer Graphics (2007)

Visibility determination is one of the oldest problems in computer graphics. The visibility, in terms of back-to-front polygon visibility ordering, is determined by updating a priority list as the viewpoint moves. A new list-priority algorithm, utilizing a property of Voronoi diagrams, is proposed in this paper. The operation is in two phases. First, in a pre-processing phase the scene is divided into Voronoi cells. A sub-list associated with each cell contains references to those polygons that intersect with it. The polygons are assigned a fixed set of view-independent priority orders within the cluster. Last, an interactive phase sorts the clusters according to the depth value of each Voronoi site. The most time-consuming work is performed during the pre-processing phase that only has to be executed once for the scene. Since all the polygons in a cell are pre-computed to obtain the fixed priority order within the cluster, a relatively simple task is left in the interactive phase, which is only to sort the clusters repeatedly when the viewpoint is changed. This method contains performance benefits that make it better shaped than previous BSP based methods.
Remote Access to Universal Plug and Play (UPnP) Devices Utilizing the Atom Publishing Protocol
Authors: Petros Belimpasakis, Vlad Stirbu
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

The Universal Plug and Play (UPnP) Forum has specified protocols which enable consumer electronics devices, computers and smart appliances to discover and use each other's services. This is possible when devices are connected to the same network, usually that being a home network. Currently, UPnP does not specify any method for remotely accessing the services of home devices, from devices that are connected on another, external, network. In this paper we propose a solution that utilizes web syndication protocols, such as the IETF Atom, for enabling remote usage of UPnP devices, without major modifications to the end-user UPnP applications.
Human Limb Delineation and Joint Position Recovery Using Localized Boundary Models
Authors: Chris McIntosh, Ghassan Hamarneh, Greg Mori
Venue: Proceedings of the IEEE Workshop on Motion and Video Computing (2007)

We outline the development of a self-initializing kinematic tracker that automatically discovers its part appearance models from a video sequence. Through its unique combination of an existing global joint estimation technique and a robust physical deformation based local search method, the tracker is demonstrated as a novel approach to recovering 2D human joint locations and limb outlines from video sequences. Appearance models are discovered and employed through a novel use of the deformable organisms framework which we have extended to the temporal domain. Quantitative and qualitative results for a set of five test videos are provided. The results demonstrate an overall improvement in tracking performance and that the method is relatively insensitive to initialization, an important consideration in gradient descent-style search algorithms.
Space-time multiuser detection in multipath CDMA channels
Authors: Xiaodong Wang
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 05 (1999)

The problem of multiuser detection in multipath CDMA channels with receiver antenna array is considered. The optimal space-time multiuser receiver structure is first outlined, followed by linear space-time multiuser detection methods based on iterative interference cancellation. Single user-based space-time processing methods are also considered and are compared with the multiuser approach. It is seen that the proposed multiuser space-time processing techniques offer substantial performance gains over the single-user-based methods, especially in a near-far situation.
Fit Perspectives and Theory Building in Information Systems
Authors: Victoria Mitchell, Hasan Mohammad, Tracey Stock, Xueqi (David) Wei
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Our study examines the fit concept in the context of IS planning, a major research stream in the IS literature. Previous research reveals inconsistencies in the IS planning literature that may be due to a lack of congruence between the conceptual and statistical forms of fit employed within and between studies. We systematically examined the IS planning literature between 2000 and 2006 for congruence between the conceptual and statistical forms of fit. We found that 17% of studies lacked congruence and the most problematic area was with the bivariate representations of fit. We provide an empirical comparison of bivariate formulations and a decision tree to determine appropriate forms of fit.
The NMI build & test laboratory: continuous integration framework for distributed computing software
Authors: Andrew Pavlo, Peter Couvares, Rebekah Gietzel, Anatoly Karp, Ian D. Alderman, Miron Livny, Charles Bacon
Venue: Proceedings of the 20th conference on Large Installation System Administration (2006)

We present a framework for building and testing software in a heterogeneous, multi-user, distributed computing environment. Unlike other systems for automated builds and tests, our framework is not tied to a specific developer tool, revision control system, or testing framework, and allows access to computing resources across administrative boundaries. Users define complex software building procedures for multiple platforms with simple semantics. The system balances the need to continually integrate software changes while still providing on-demand access for developers. Our key contributions in this paper are: (1) the development of design principles for distributed build-and-test systems, (2) a description of an implemented system that satisfies those principles, and (3) case studies on how this system is used in practice at two sites where large, multi-component systems are built and tested.
Application of the Kinetic Voronoi Diagram to the Real-Time Navigation of Marine Vessels
Authors: Rafal Goralski, Christopher Gold, Maciej Dakowicz
Venue: Proceedings of the 6th International Conference on Computer Information Systems and Industrial Management Applications (2007)

In this paper a new type of GIS system for maritime navigation safety is proposed. The system takes advantage of the properties of the kinetic Voronoi diagram, and uses the "Quad-Edge" data structure for the real-time maintenance of the spatial relationships of ships and other navigational objects. The locations of ships are updated using a standard onboard AIS transponder, and moving-points Voronoi algorithms. The spatial relationships are used for collision detection and avoidance. The system is aimed at tackling the main cause of marine accidents -- human errors -- by providing navigational aid and decision support to navigators. The brief introduction into static and kinematic Voronoi methods is given and is followed by the discussion of different types of GIS systems for marine purposes. The state-of-the-art in maritime safety and its major developments are also covered.
Beyond Mere Compliance of RFID Regulations by the Farming Community: A Case Study of the Cochrane Dairy Farm
Authors: Adam Trevarthen, Katina Michael
Venue: Proceedings of the International Conference on the Management of Mobile Business (2007)

Radio-frequency identification (RFID) is changing the face of livestock identification and management. Beyond satisfying the regulations of government agencies for livestock to be a part of a national identification system for tracking purposes, farmers are now considering venturing beyond mere basic compliance systems. Once installed, farmers have begun to realize that their initial capital investment into an RFID system holds great strategic potential. The initial outlay while substantial is a once only cost that with a few more application-centric uses can yield a return on investment manifold. This paper presents a case study of the Cochrane Dairy Farm situated on the New South Wales South Coast. The case study shows that the Cochrane Dairy farm utilizes advanced total farm management techniques that will before too long lead to greater dividends. The contribution of this paper is in presenting how a dairy farm has adopted RFID initially to meet government directives, and then for broader more personalized requirements. Farming processes are defined explicitly and the paper points to encourage other farmers to consider adoption of RFID beyond the need for compliance and toward the perspective of longer term productivity and strategic visibility.
Classification of the electrocardiogram using selected wavelet coefficients and linear discriminants
Authors: P. de Chazal
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 06 (2000)

Twenty-live wavelet coefficients were selected as inputs and cross-validation used to estimate the classifier performance. An overall accuracy of 72.3% was achieved using a database of 500 ECG records independently classified into seven classes. This compared well with published cardiologist classification rates. By introducing a no-classification state, the accuracy increased to 7.9% with 80% of ECG records classified. The method presented here is not specific to the ECG domain and may easily be applied to other classification problems.
A framework for alternate queueing: towards traffic management by PC-UNIX based routers
Authors: Kenjiro Cho
Venue: Proceedings of the annual conference on USENIX Annual Technical Conference (1998)

Queueing is an essential element of traffic management, but the only queueing discipline used in traditional UNIX systems is simple FIFO queueing. This paper describes ALTQ, a queueing framework that allows the use of a set of queueing disciplines. We investigate the issues involved in designing a generic queueing framework as well as the issues involved in implementing various queueing disciplines. ALTQ is implemented as simple extension to the FreeBSD kernel including minor fixes to the device drivers. Several queueing disciplines including CBQ, RED, and WFQ are implemented onto the framework to demonstrate the design of ALTQ. The traffic management performance of a PC is presented to show the feasibility of traffic management by PC-UNIX based routers.
Garbage collection and DSM consistency
Authors: Paulo Ferreira, Marc Shapiro
Venue: Proceedings of the 1st USENIX conference on Operating Systems Design and Implementation (1994)

This paper presents the design of a copying garbage collector for persistent distributed shared objects in a loosely coupled network with weakly consistent distributed shared memory (DSM). The main goal of the design for this garbage collector is to minimize the communication overhead due to collection between nodes of the system, and to avoid any interference with the DSM memory consistency protocol. Our design is based on the observation that, in a weakly consistent DSM system, the memory consistency requirements of the garbage collector are less strict than those of the applications. Thus, the garbage collector reclaims objects independently of other copies of the same objects without interfering with the DSM consistency protocol. Furthermore, our design does not require reliable communication support, and is capable of reclaiming distributed cycles of dead objects.
Asynchronous iterative solution for state-based performance metrics
Authors: Douglas V. de Jager, Jeremy T. Bradley
Venue: Proceedings of the 2007 ACM SIGMETRICS international conference on Measurement and modeling of computer systems (2007)

Solution of large sparse fixed-point problems, Mline over x = over x and Mline over x + line over b = over x, may be seen as underpinning many important performance-analysis calculations. These calculations include steady-state, passage-time and transient-time calculations in discrete-time Markov chains, continuous-time Markov chains and semi-Markov chains. In recent years, much work has been done to extend the application of asynchronous iterative fixed-point solution methods to many different contexts. This work has been motivated by the potential for faster solution, more efficient use of the communication channel and/or access to memory, and simplification of task management and programming. In this paper, we present theoretical developments which allow us to extend theapplication of asynchronous iterative solution methods to solve for the key performance metrics mentioned above-such that we may employ the full breadth of Chazan and Miranker's classes of asynchronous iterations.
Evaluating of creative thinking of students and creativity development at Southeast University, China
Authors: Li Jiazeng
Venue: Proceedings of the Frontiers in Education Conference,1997. on 27th Annual Conference. Teaching and Learning in an Era of Change. - Volume 01 (1997)

On the basis of creative thinking test of students at Southeast University, characteristics of students' creative thinking and their relations to creativity are summarized in this paper. The main characteristics of students' creative thinking evaluated in the test are fluency, flexibility and elaboration. Generally speaking, marks of fluency and flexibility have direct relations to the general grade of creative thinking. Thus, it is important to train fluency and flexibility of thinking in order to develop students' creative thinking ability. The above understanding led to the reform in engineering education. First, the authors set up a course of creativity development for students. In the course known as Creative Studies or Creatology, students took part in various exercises of fluent thinking and flexible thinking, especially divergent thinking, to facilitate their creative thinking ability. Second the authors improved their teaching methods in class. The chief reform included self-comment, mutual comment, debating, discussion on special items, exercise-correcting, mutually and creativity-compensated examination, etc. The above reform in class meant an attempt of creative education. The investigation showed that most of the students increased their creativity effectively through creative education.
On integrating acoustic echo and noise cancellation systems for hands-free telephony
Authors: S. R. Koch
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02 (2001)

An integrated acoustic echo and noise cancellation system for hands-free telephony is presented. The proposed system includes a new residual echo cancellation scheme based on spectral analysis and a new double-talk detector suitable for real-time implementation. Residual echo is whitened via AR analysis during no near-end-talk period and is cancelled by noise reduction. Removing speech characteristics of the residual echo signal, noise reduction successfully reduces the power of the residual echo as well as the ambient noise. For further integration with commercial low-bit rate speech coders, noise reduction in IS-127 (EVRC) was considered. For the hands-free situation in the moving car, the proposed system attenuated the interferences more than 30 dB at a constant speed of 90 km/h. The proposed system was implemented on a low-cost DSP with 16-bit fixed-point arithmetic.
Exploiting the synergy between peer-to-peer and mobile ad hoc networks
Authors: Y. Charlie Hu, Saumitra M. Das, Himabindu Pucha
Venue: Proceedings of the 9th conference on Hot Topics in Operating Systems - Volume 9 (2003)

We argue that there exists a synergy between peer-to-peer (p2p) overlay networks for the Internet and mobile ad hoc networks (MANETs) connecting mobile nodes communicating with each other via multi-hop wireless links-both share the key characteristics of self-organization and decentralization, and both need to solve the same fundamental problem, that is, how to provide connectivity in a decentralized, dynamic environment. We propose Dynamic P2P Source Routing (DPSR), a new routing protocol for MANETs that exploits the synergy between p2p and MANETs for increased scalability. By integrating Dynamic Source Routing (DSR) and a proximity-aware structured p2p overlay routing protocol, DPSR limits the number of the source routes that each node has to discover and rediscover to O(logN), while retaining all the attributes of DSR for dealing with the specifics of ad hoc networks. This is in contrast to the maximum of N source routes each node has to maintain in DSR. Thus DPSR has the potential to be more scalable than previous routing protocols for MANETs, such as DSR and AODV. In addition to being a network layer multi-hop routing protocol, DPSR simultaneously implements a distributed hash table (DHT) in MANETs; it implements the same functionalities as CAN, Chord, Pastry, and Tapestry, which can be exposed to the applications built on top of it via a set of common p2p APIs.
Treecube+3D-ViSOM: Combinational Visualization Tool for Browsing 3D Multimedia Data
Authors: Seiji Okajima, Yoshihiro Okada
Venue: Proceedings of the 11th International Conference Information Visualization (2007)

This paper proposes a new visualization tool for browsing 3D multimedia data. This is realized as a combinational visualization tool of Treecube and 3DViSOM which are both proposed by the same research group of the authors. Treecube is a visualization tool for hierarchical information developed as a 3D extension from a 2D visualization tool, Treemap proposed by Ben Shneiderman, et. al. in 1992. Treecube is useful for browsing 3D multimedia data stored in a file system because the file system has a hierarchical structure. However, if many data exist in one directory, it is not easy for the user to find his/her required data from it. On the other hand, 3D-ViSOM is a 3D-SOM (Self Organizing Map) based visualization tool for browsing 3D multimedia data. Using the 3D-SOM layout, similar feature data are located in the same area and it is easy for the user to find his/her required data by the browsing. Since 3D-ViSOM can solve the problem Treecube has, the authors propose a combinational visualization tool of Treecube and 3DViSOM in this paper.
A brokerage system for solar data archives
Authors: C. Zunino, I. Pompili, A. Sanna, L. Ciminiera
Venue: Software&mdash;Practice Experience (2007)

Scientific research and practical applications of solar physics require data and computational services to be integrated seamlessly and efficiently. The European Grid for Solar Observations (EGSO) leverages Grid-oriented concepts and technology to provide a high-performance infrastructure for solar applications. In this paper, an architecture for a data brokerage service is proposed. Brokers interact with providers and consumers in order to build a profile of both parties. In particular, a broker interacts with providers in order to gather information on the data potentially available to consumers, and with the consumers in order to identify the set of providers that are most likely to satisfy specific data needs. The brokerage technique is based on a multi-tier management of metadata. Copyright &copy; 2006 John Wiley & Sons, Ltd.
A New TCP Congestion Control Mechanism over Wireless Ad Hoc Networks by Router-Assisted Approach
Authors: Yao-Nan Lien, Ho-Cheng Hsiao
Venue: Proceedings of the 27th International Conference on Distributed Computing Systems Workshops (2007)

Due to unawareness of network conditions, regular Transmission Control Protocol (TCP) is not able to fully control the limited resources and distinguish packet loss from congestion loss and random loss. Because of such characteristics, the performance of TCP will be downgraded severely if it runs on wireless networks, such as multi-hop ad hoc networks. In an ad hoc network, nodes play both roles of end system as well as router. We take this advantage to propose a new TCP congestion control mechanism by router-assisted approach. Based on the information feedbacked from routers, a TCP sender is able to adjust its sending speed dynamically in order to avoid overshooting problem. Our proposed protocol has 5~10% higher throughput than TCP NewReno and much less number of retransmissions. The fairness is also achieved while our proposed protocol coexists with other major TCP variants.