ppxscal/embedding_network huggingface dataset:
Development and evaluation of a Web-based signal and speech processing laboratory for distance learning
Authors: A. Spanias
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 06 (2000)

We describe an Internet-based signal processing laboratory that provides hands-on learning experiences in distributed learning environments. The laboratory is based on an object-oriented Java/sup TM/ tool called Java Digital Signal Processing (J-DSP). J-DSP has been developed at Arizona State University (ASU) and is being used for a virtual laboratory in a senior-level DSP course. J-DSP is written as a platform-independent Java applet that resides on the Web and is thereby accessible by all students through the use of a Web browser. J-DSP has a rich suite of signal processing functions that facilitate interactive on-line simulations of modern statistical signal and spectral analysis algorithms, filter design tools, QMF banks, and state-of-the-art vocoders. J-DSP is accompanied by administrative software tools for secure Internet-based lab-report submission and evaluation including servlets for maintaining Web-based grade books. A series of J-DSP laboratory exercises has been developed and delivered using the ASU distance learning facilities. Student evaluations as well as assessments by experts have been compiled and preliminary results are quite encouraging.
Hybrid Realtime Simulation of the Space Docking Process
Authors: Hao Yan, Junwei Han, Zhizhong Tong, Hongren Li
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

In order to test the space docking mechanism on the ground, the docking process of two spacecrafts must be simulated. The hybrid simulation (hardware-in-loop simulation) is a preferred method for its great applicability to different spacecrafts. Therefore, a space docking hybrid simulation (SDHS) prototype system is established. In this system actual spacecrafts are replaced by virtual ones and the docking dynamics model is built according to moment of momentum equations of the spacecrafts. Then a distributed realtime computer system is used for calculating the relative motion of the spacecrafts and driving a Stewart platform to implement this motion. Adopting an imitated docking mechanism in the experiment, the whole process of space docking is simulated successfully. On the basis of this system, a SDHS system using for testing actual docking mechanisms can be constructed in the future.
Prediction error based feedback for downlink transmit beamforming
Authors: S. Nagaraj
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2001. on IEEE International Conference - Volume 05 (2001)

This paper examines a downlink transmit beamforming scheme we proposed recently (see Nagaraj, S. and Huang, Y.F., Asilomar Conference on Signals, Systems and Computers, 2000). The idea is based on the use of an adaptive channel estimator at the base-station and requires the mobile selectively to feed back the value of the prediction error. This paper proposes a joint maximum-likelihood and set-membership filtering algorithm for adaptive channel estimation that provides robustness against incorrect feedback due to mobile decision errors. The amount of power and bandwidth saving possible with this scheme is quantified via an uplink capacity analysis.
A performance model to Cooperative Itinerant Agents (CIA): a security scheme to IDS
Authors: Rafael Paez, Cristina Satizabal, Jordi Forne
Venue: Proceedings of the The Second International Conference on Availability, Reliability and Security (2007)

Intrusion Detection Systems (IDS) based on autonomous agents are important security tools to protect distributed networks and they can be considered critical systems. For this reason; we have proposed a security scheme to verify the entities' integrity inside the IDS architecture named Cooperative Itinerant Agent (CIA). The proposal includes software watermarking and fingerprinting techniques. Moreover, in this paper we infer a formula to calculate the time consumed by a CIA to perform entities' verification in a determined level of the infrastructure in order to evaluate the agent's scalability. The parameters of this formula are the network's throughput and delay.
Design of an ontology management framework
Authors: R. Harrison, D. Obst, C. W. Chan
Venue: Proceedings of the Fourth IEEE International Conference on Cognitive Informatics (2005)

This paper presents design of an ontology management framework that supports management of the ontology development process. A distinguishing feature of the proposed framework is the central role occupied by the property of monotonicity, which supports addition but not deletion of knowledge into an ontology. The framework supports object-oriented representation of knowledge, versioning control, ontology product lines and security of ontologies. It is part of an evolving infrastructure for supporting knowledge reuse and ontology construction for knowledge-based system development. The framework is currently being developed in a client server environment. With the ontology management system, an ontology developer can focus on the conceptualization and ontology modeling of a problem domain, assured that the management and administration of the modeling process will be automatically supported. In this paper, details on design considerations for the components of the management framework are discussed.
Full covariance modelling and adaptation in sub-bands
Authors: B. Doherty
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 02 (2000)

With regard to the current interest in sub-band based modelling in the ASR community, this paper explores the gains in recognition performance and complexity reduction achieved by sub-band based full covariance modelling and speaker adaptation. With sub-band features, instead of a single large covariance matrix, it is now possible to have a set of smaller matrices making it practical to use Gaussian distributions employing full covariance matrices. This benefit is further demonstrated to give a significant complexity reduction in the implementation of speaker adaptation by maximum likelihood linear regression. The use of sub-band cepstra moreover presents the opportunity of capturing localised discriminative cues which contribute to increased recognition. In light of these gains, this paper explores the advantages of sub-band full covariance modelling and presents experimental evaluation on the WSJCAMO continuous speech database.
A Certification Authority for Elliptic Curve X.509v3 Certificates
Authors: Maria-Dolores Cano, Ruben Toledo-Valera, Fernando Cerdan
Venue: Proceedings of the Third International Conference on Networking and Services (2007)

Wireless networks are more and more common in current communications networks. Nevertheless, wireless communications entail a big concern: security. The use of X.509v3 certificates to carry out authentication tasks is an approach to improve security. These certificates are usually employed with the RSA algorithm. Elliptic Curve Cryptography (ECC) is a cryptographic technique eminently suited for small devices, like those used in wireless communications, and is gaining momentum. The main advantage of ECC versus RSA is that for the same level of security it requires a much sorter key length. The purpose of this work is to design and implement a free open-source Certification Authority able to issue X.509v3 certificates using ECC. This research is an implementation study on free open-source tools to issue digital certificates using ECC. Moreover, it contributes to the development of free open-source tools for network security based on ECC. The result of this research may assist organizations to increase their security level in wireless devices and networks, in a costless way, by including authentication techniques based on ECC digital certificates.
Three-dimensional analysis of Marangoni flow and radial segregation in GexSi1-x melt with Czochralski configuration
Authors: S. Abbasoglu, I. Sezai
Venue: Engineering with Computers (2007)

In order to examine the flow field and the radial segregation of silicon (Si) in a GexSi1-x melt with an idealized Czochralski (Cz) configuration, we conducted a series of unsteady three-dimensional (3-D) numerical simulations under zero-gravity conditions. The effect of convection driven by surface tension on the free surface of the melt was included in the model, by considering thermal, as well as solutal Marangoni convection. The concentration and flow fields at several stages during crystal growth are presented for several temperature differences, driving the Marangoni convection. The simulation results indicate that the flow and concentration fields are axisymmetric for MaT <&#x00a0; 625 and become oscillatory and 3-D for higher values. It was found that the maximum Si concentration difference at the growth interface decreases as thermal Marangoni number increases due to higher flow velocities in the vicinity of the interface. However, temporal fluctuations of Si concentration at the interface increase at higher thermal Marangoni numbers. The effects of aspect ratio (Ar) were also considered in the model. It was found that the aspect ratio of the melt in the crucible has a prominent influence on the flow pattern in the melt which, in turn, effects the Si concentration at the growth interface.
Frame-based packet scheduling algorithms for input queued switches
Authors: Xiaojun Shen
Venue:  (2006)

With good scalability, input-queued switches have become the main switch architecture used in today's high speed networks. However, input-queued switches need efficient packet scheduling to satisfy growing bandwidth demands and high quality of services (QoS). Existing scheduling algorithms mainly focus on throughput guarantees but are weak in providing deterministic delay guarantees. In order to provide differential QoS guarantees, this dissertation studies the deadline guaranteed packet scheduling problem that aims to schedule a maximum number of packets from input ports to their destined output ports before their deadlines. This problem has been proved to be an NP-complete problem, and traditionally EDF (Earliest Deadline First) or similar approaches have been the only ways to deal with it. This dissertation proposes a novel algorithm called Flow-based Iterative Packet Scheduling (FIPS) algorithm which is fundamentally different than the EDF approach. Simulations show that FIPS outperforms EDF with a much higher success rate and a much lower packet dropping ratio. To further improve the scalability, frame-based scheduling is assumed instead of slot-by-slot-based scheduling. Frame-based scheduling groups a constant number of consecutive time slots into a frame. It buffers arriving packets in the current frame and schedules them into the next frame. Frame-based scheduling thus computes a schedule per frame rather than per slot to reduce the frequency of schedule computation. Motivated by the potential savings in the overhead of segmentation and reassembly in handling variable sized packets, this dissertation also studies packet-mode scheduling where all constituent cells of a packet must be consecutively transmitted from an input to their destined output without interleaving. A formula is given on the relation between the frame sizes and the packet sizes that classifies the conditions for the scheduling problem to be polynomial solvable, or otherwise NP-hard. An interesting result is that the NP-hardness is not solely determined by how many different packet sizes are involved. It may be polynomial solvable even if many different sizes occur in the set, while it may be NP-hard with just two packet sizes present.
Annotation functionality for digital libraries supporting collaborative performance: an example of musical scores
Authors: Megan Winget
Venue: Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries (2007)

This paper describes the findings of an ethnographic study that examined the annotation behaviors of musicians working with musical scores for the purpose of performance. Annotation was found to be an important part of the rehearsal process, and specific annotation functionalities are recommended for future digital library development.
Pokémon: Game Play as Multi-Subject Learning Experience
Authors: Yu-Hong Lin
Venue: Proceedings of the The First IEEE International Workshop on Digital Game and Intelligent Toy Enhanced Learning (2007)

This paper is to present a case study about learning different subjects, such as Chinese philosophy, geography, biology, and mathematics, through a very popular video game called Pokémon. In the game many elements are integrated into one game play, which could be introduced in senior years of elementary school or freshman year of junior high school if they are properly arranged according to Grade 1-9 Curriculum Guidelines in Taiwan. An outline of course arrangement for mathematics is proposed based on the objectives of the guidelines and the content of the game.
Using client puzzles to protect TLS
Authors: Drew Dean, Adam Stubblefield
Venue: Proceedings of the 10th conference on USENIX Security Symposium - Volume 10 (2001)

Client puzzles are commonly proposed as a solution to denial-of-service attacks. However, very few implementations of the idea actually exist, and there are a number of subtle details in the implementation. In this paper, we describe our implementation of a simple and backwards compatible client puzzle extension to TLS. We also present measurements of CPU load and latency when our modified library is used to protect a secure webserver. These measurements show that client puzzles are a viable method for protecting SSL servers from SSL based denial-of-service attacks.
Mutual interference analysis of IEEE 802.15.4 and IEEE 802.11b
Authors: Soo Young Shin, Hong Seong Park, Wook Hyun Kwon
Venue: Computer Networks: The International Journal of Computer and Telecommunications Networking (2007)

IEEE 802.15.4 and IEEE 802.11b, operating in the 2.4GHz unlicensed industrial scientific medical (ISM) frequency band, may lead to signal interference and result in significant performance degradation when devices are collocated in the same environment. The main goal of this paper is to evaluate the effect of mutual interference on the performance of IEEE 802.15.4 and IEEE 802.11b systems. An analytic model for interference between IEEE 802.15.4 and IEEE 802.11b is suggested. The packet error rate (PER), transmission delay, and throughput are evaluated for IEEE 802.15.4 and IEEE 802.11b. The power spectral density of the IEEE 802.11b is considered in order to determine in-band interference power of the IEEE 802.11b to the IEEE 802.15.4. The simulation results by OPNET are shown to validate the numerical analysis.
Creating a Virtual Activity for the Intangible Culture Heritage
Authors: Cheng Yang, Dongmei Peng, Shouqian Sun
Venue: Proceedings of the 16th International Conference on Artificial Reality and Telexistence--Workshops (2006)

This work recovered an ancient crowd activity for virtual heritage. virtual reality technique was used to reconstruct and imitate cultural space and crowd cultural activity in warring States time. According to literal recordation, ancient images and ancient relic, we reconstructed characters, finery and architecture by 3d modeling technique. Motion was collected from actors by motion capture technique and arranged newly. At last, a virtual crowd was introduced into the 3D reconstruction of a complex heritage building to increase the realism of the reconstructed scene. A rule behavior system was created to represent a complex interactive scenario. It is better to make users know virtual heritage comfortably by interactive way, increase the extent and depth of intangible culture transmitted.
A multi-agent system for supporting the prediction of protein structures
Authors: Alfredo Garro, Giorgio Terracina, Domenico Ursino
Venue: Integrated Computer-Aided Engineering (2004)

In the last years numerous tools for predicting the three-dimensional structure of proteins have been proposed. Although their performance is constantly increasing, they are not sufficiently general to be exploited in any prediction problem. As a consequence, in order to improve the prediction quality, it could be particularly useful to jointly apply different prediction tools to the same problem and, then, integrate their results. In such a context, since the various predictors could have different performances on the same prediction, the choice of the predictors to jointly apply for guaranteeing the best performances appears crucial. In this paper we propose X-MACoP, an XML multi-agent system for supporting a user in the prediction of the three-dimensional structures of proteins. In particular, X-MACoP carries out the following tasks, in a way completely transparent for the user: (i) choice of the most promising predictor team to apply for the prediction problem of interest for the user; (ii) integration of the results produced by the predictors of the team for constructing a unique global prediction for the user; (iii) possible translation of predictor inputs and outputs in such a way that a user handles a unique data format.
Passive data link layer 802.11 wireless device driver fingerprinting
Authors: Jason Franklin, Damon McCoy, Parisa Tabriz, Vicentiu Neagoe, Jamie Van Randwyk, Douglas Sicker
Venue: Proceedings of the 15th conference on USENIX Security Symposium - Volume 15 (2006)

Motivated by the proliferation of wireless-enabled devices and the suspect nature of device driver code, we develop a passive fingerprinting technique that identifies the wireless device driver running on an IEEE 802.11 compliant device. This technique is valuable to an attacker wishing to conduct reconnaissance against a potential target so that he may launch a driver-specific exploit. In particular, we develop a unique fingerprinting technique that accurately and efficiently identifies the wireless driver without modification to or cooperation from a wireless device. We perform an evaluation of this fingerprinting technique that shows it both quickly and accurately fingerprints wireless device drivers in real world wireless network conditions. Finally, we discuss ways to prevent fingerprinting that will aid in improving the security of wireless communication for devices that employ 802.11 networking.
A comparison between the variational iteration method and Adomian decomposition method
Authors: Abdul-Majid Wazwaz
Venue: Journal of Computational and Applied Mathematics (2007)

In this paper, we present a comparative study between the variational iteration method and Adomian decomposition method. The study outlines the significant features of the two methods. The analysis will be illustrated by investigating the homogeneous and the nonhomogeneous advection problems.
Parallel processing with windows NT networks
Authors: Partha Dasgupta
Venue: Proceedings of the USENIX Windows NT Workshop on The USENIX Windows NT Workshop 1997 (1997)

Workstation-based parallel processing is an area that is still dominated by Unix-based systems. We have been building new methods for shared-memory parallel processing systems on top of Windows NT based networks of machines. As of present we have been involved in four related systems, called Calypso NT, Chime, Malaxis and MILAN. All of these are middleware, that is they are system level libraries and utility programs that allow programmers to utilize a network efficiently for high volume computations. Calypso was first built on Unix [BDK95], and then ported to Windows NT. Chime and Malaxis are NT systems and MILAN is still under the design phase. This paper describes the systems, the techniques used to implement them on Windows NT and the roadblocks from a Unix programmer's point of view.
Improving the DNS mechanism in a data center intranet: Research Articles
Authors: Thierry Bessis
Venue: Bell Labs Technical Journal (2007)

The Internet Protocol (IP) Multimedia Subsystem (IMS) is an architecture for supporting multimedia services via a Session Initiation Protocol (SIP) infrastructure. IMS is specified in technical releases of the 3rd Generation Partnership Project (3GPP&ast;). With IMS (and similar architecture), each call instance will require many SIP components to interwork, in order to provide the service. Many of them are typically installed together, in a data center in an office building. Between those components, the regular and standard way to obtain the IP address and port number of others is to resolve their unified resource identifier (URI) using the domain name system (DNS). This approach has several drawbacks: it uses CPU resources to retrieve the data, the data may be obsolete, and it does not take into account the actual availability of the peer node. When several peer nodes can fulfill the request, round robin distribution is usually used and thus ignores the actual occupation of the peers. No admission control is provided, and overloaded peer nodes will continue to be used even through other nodes are less heavily loaded. This paper will describe how the Alcatel-Lucent Session Manager has resolved those problems using a generic solution, applicable when many signaling nodes in an office building need to communicate with each other. An important aspect is that this solution is transparent to the applications and is integrated with DNS. &copy; 2007 Alcatel-Lucent.
A Proposed Framework for Accreditation of Online Continuing Medical Education
Authors: Panagiotis D. Bamidis, Maria M. Nikolaidou, Stathis Th. Konstantinidis, Costas Pappas
Venue: Proceedings of the Twentieth IEEE International Symposium on Computer-Based Medical Systems (2007)

Continuing medical education tends to be considered compulsory in most countries although it is described by the Union of European Medical Specialists as an ethical duty. Accreditation of CME and allocation of credits is not yet mandatory in the EU but it is important for providers of educational activities to meet certain quality criteria so as to be prepared for future requirements. Many software platforms and Learning Management Systems (LMS) can be used to support web-based courses for online CME. Certain standards like SCORM, define the set of specifications that enables cross-system workflows. Updates and extensions of SCORM specifications enable further enhancements. The current research proposes a framework for the accreditation of online CME courses through the enhancement of the SCORM model and the use of metadata, using a SCORM-compliant open source LMS platform, namely, moodle. The model assumes the definition of learning objects and learning outcomes for a specific target audience of the course and the design of an instructional module incorporating several types of learning material.
Vertex-Magic Total Labelings of Regular Graphs
Authors: Ian D. Gray
Venue: SIAM Journal on Discrete Mathematics (2007)

In this paper it is shown that if a graph $G$ possesses a spanning subgraph $H$ with a strong vertex magic total labeling (VMTL) and $G-E(H)$ is even-regular, then $G$ also has a strong VMTL. Among other things, this is used to conclude that all Hamiltonian regular graphs of odd order possess strong VMTLs. A relationship is then demonstrated between regular graphs of even degree and sparse magic squares. We next consider cubic graphs of order $2n$ consisting of two 2-factors of order $n$, connected by a 1-factor (quasi-prisms). Based on McQuillan&rsquo;s construction of VMTLs of such 3-regular graphs, VMTLs are derived for similar regular graphs of any odd degree. Finally, a construction is given for VMTLs of quartic graphs of order $4n+2$ consisting of two cycles of odd order $n$ connected by a 2-factor (simple quasi-anti-prisms), and based on this construction VMTLs are derived for similar regular graphs of any even degree.