ppxscal/embedding_network huggingface dataset:
A linear time-varying controller for synchronization of Lü chaotic systems with one input
Authors: Antonio Loría
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

This brief addresses the problem of synchronization of two Lü chaotic systems. As opposed to nonlinear Lyapunov-based controllers, which are designed with the aim of rendering the derivative of a Lyapunov function negative along trajectories of the closed-loop system, control design exploits the natural stability properties of the system. The proof relies not only on basic Lyapunov stability theory but also on other concepts, such as persistency of excitation. The contribution with respect to other works is to show that one control input is enough to force synchronization; moreover, the controllers are linear time varying.
Power consumption analysis of user-identity feedback
Authors: Chan-Soo Hwang, Hichan Moon
Venue: IEEE Communications Letters (2009)

User-identity feedback was proposed to achieve multi-user diversity while minimizing feedback load. This letter mathematically shows that the transmit-power consumption of the user-identity feedback converges to zero as the number of users increases. Numerical results in a Rayleigh fading channel show that the transmit-power saving is substantial even with small number of users.
Efficient shuffle network architecture and application for WiMAX LDPC decoders
Authors: Jun Lin, Zhongfeng Wang, Li Li, Jin Sha, Minglun Gao
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

In this brief, a new algorithm that can efficiently generate all the control signals for the shuffle network used in flexible low-density parity-check (LDPC) decoders is proposed. Employing the proposed algorithm, the hardware complexity of the controller of shuffle networks using the Benes network structure can be significantly reduced. In addition, a low-complexity reconfigurable shuffle network architecture for flexible LDPC decoders is developed. Both the Benes network and the controller can be tailored to fit specific applications. Consequently, an efficient shuffle network for WiMAX LDPC decoders is presented. Synthesis results demonstrate that with the SMIC 0.18-µm complementary metal-oxide-semiconductor process, the total gate count of the proposed shuffle network is only 16 000. The area saving is between 26.6% and 71.1% compared to related works in the literature.
Network Worm Propagating Model Based on Network Topology Unit
Authors: Wei Zhang, Shize Guo, Kangfeng Zheng
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 01 (2009)

The existing analytic models on network worm propagation rarely consider the effect of topology structure, and it usually considers the probability and spread parameter as fixed values. They are not coinciding with real situation. Here in the paper, a microstructure based propagation model is proposed to inflect the variability with time. In this model, many probability factors are considered, for example the connecting probability from one node to another node, one node's immune probability, which make the model more general and suitable for simulation.
The Impact of Dynamic Adversarial Attacks on the Stability of Heterogeneous Multimedia Networks
Authors: Dimitrios Koukopoulos
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 01 (2009)

Modern large-scale multimedia networks, such as the Internet, are characterised by heterogeneity due to the versatile nature of the communication subsystems they consist of. We focus on heterogeneous networks where individual greedy, contention-resolution protocols are simultaneously running (composed) over different network queues. A question that arises in such settings of multimedia systems concerns the possibility of developing design criteria in order to evaluate performance degradation under dynamic adversarial attacks. A network is stable if the number of packets in its queues remains bounded at all times for any greedy protocol against any adversary of injection rate less than 1. We study stability properties under various compositions of protocols and dynamic adversarial attacks trying to characterise those properties in terms of network topologies for simple-path trajectories. We feel that this study could help on the design and maintenance of trustworthy heterogeneous networks.
Implementing UNITIS to bridge information gaps
Authors: Jan Cerny, Marc Wrubleski
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

The focus of many Universities or Colleges is split between its customers, the students, and the regulators who make sure the large-scale requirements of the University are being met. The institution is required to provide more services to more students, but not with accompanying increases in resources. This tends to cause rifts within the Institution as some needs are met, but others are not. The Information Systems of these institutions are prone to rifts as well, and those discrepancies show as information gaps. If vital information is either not captured, or is required to be captured repeatedly and independently, then these gaps cause inefficiencies and frustration of all information stakeholders. To bridge these gaps at the grass root level, departments and faculties at post secondary educational institutions attempt to implement their own proprietary information systems. These systems are designed to provide units with up to date, integrated, local information and are used for both internal and public interfaces. In this case, however, institutions are left scattered with multiple non standard, single use tools which do not scale. At the same time, the top down approach of many universities and colleges is to implement one of the comprehensive administrative products from industry leaders such as Oracle, IBM, SAP or others. But as we argue in this paper, these enterprise systems alone do not fulfill all of the information needs. With their arrival, there is an even bigger need to consolidate software which shadows these systems, and to connect all the pieces of software puzzle together. Our institution recently implemented Oracle's PeopleSoft Enterprise and requirements and expectations have dramatically changed as a result. The PeopleSoft Enterprise product is a comprehensive and advanced tool to manage large organizations, but academic units of the institution need to manage more and different scope of data than PeopleSoft exposes. This paper argues that our Unit Information System (UNITIS) fills both horizontal (inter faculty and departmental) and vertical (administration versus faculties) information gaps for academic units and integrates well with enterprise solution our institution choose to implement. UNITIS is an information system designed by and for academic units to manage their daily operations. But its main strength is in its ability to tie academic units into the institutional enterprise system.
The Analysis of Intelligent Water-Jet Propulsion System Optimization on Self-Service Gliding-Hydrofoil Craft
Authors: Wang Guo, Yang Songlin, Chen Peng
Venue: Proceedings of the 2009 Second International Symposium on Computational Intelligence and Design - Volume 02 (2009)

In this paper, the auther establish a model of water-jet propulsion system for self-service gliding-hydrofoil craft. A fuzzy logic controller is designed based on MATLAB and SIMULINK. And simulation experiment is performed. Experiment results show that the fuzzy logic controller is useful and is affected by interference. And the less the interference, the more balanced the effect is.
Performance of optimum and suboptimum receivers for space-time coded systems in correlated fading
Authors: Ranjan K. Mallik, Parul Garg
Venue: IEEE Transactions on Communications (2009)

We consider a space-time coded system in a correlated Rayleigh flat fading environment with imperfect channel estimation. Two receiver structures are considered: a suboptimum receiver and the optimum maximum likelihood receiver. The system performance of both receivers is analyzed in terms of the pairwise error probability.
Feedback biasing in nanoscale CMOS technologies
Authors: Tajeshwar Singh, Trond Sæther, Trond Ytterdal
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

This work rediscovers the attractiveness of feedback biasing when applied to circuits designed in nanoscale CMOS technologies. It is shown that very compact amplifiers can be obtained by utilizing a type of biasing that imposes minimal area overhead. We discuss how the undesired features of the nanoscale CMOS technologies actually help in the revival of this simple biasing method in newer technology generations. The measurement results of prototyped common-source (CS) amplifiers utilizing feedback biasing for application in medical ultrasound imaging systems are presented in this brief. The proposed feedback biasing is also suitable for amplifying signals from high-impedance sources that pose challenges on maintaining high input impedance for the voltage amplifiers while maintaining a very low input capacitance value. Measurements show that the proposed amplifier achieves a Voltage gain of 28 dB, an output noise power spectral density of 0.11 (µV)2/Hz at center-frequency, and a total harmonic distortion of -30 dB, with the full-scale output at 30 MHz, while drawing 120 µA from a 1-V power supply. The amplifiers were fabricated in 9O-nm CMOS technology and measured to be just 20 µm × 10 µm.
Using the hyperbolic distribution to estimate the precision of size distribution percentiles of fluvial gravels
Authors: David J. Scott, Judith K. Haschenburger
Venue: Computers Geosciences (2005)

The hyperbolic distribution is fitted to published grain-size data collected from the surface of two gravel-bed rivers (the Fraser and Mamquam River data sets of Rice and Church). Our parametric approach enables calculation of standard errors for estimates of percentiles, as an alternative to the use of the bootstrap for this purpose. For estimation, we have used the statistical package R and the advantages of this software for this type of analysis are highlighted in this paper.
The educational software "Phenomena and Models of the Physical World" and the learning of electrostatic phenomena
Authors: Kolimenou Maria, Stavridou Eleni
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

The aim of the present research was to reach conclusions on whether the educational software "Phenomena and models of the physical world" can help students develop representations of the structure of matter in the microscopic level in order to better understand and explain electrification phenomena. A teaching intervention has been organized with the use of the educational software "Phenomena and models of the physical world" to teach electrostatic phenomena to secondary students, by taking into account their conceptions and learning difficulties. In the research participated 50 secondary students (13--14 years old). The students answered an initial questionnaire, and a final one a week after the teaching intervention. Two classes participated in the research, the experimental class (26 students) and a control class (24 students). Data analysis showed that teaching with the use of the software really helped the students of the experimental class to develop proper microscopic representations of the structure of matter and to explain the electrification phenomenon more sufficiently than the students of the control-class.
Parameter Tuning of JXTA-Based P2P Platforms
Authors: Fatos Xhafa, Zorion Arrizabalaga, Jordi Misse, Leonard Barolli
Venue: Proceedings of the 2009 International Conference on Network-Based Information Systems (2009)

P2P technologies have appeared as disruptive technologies that have spawned large scale collaborative applications involving thousands or even millions of users world-wide. Undoubtedly, most successful applications of P2P paradigm are information sharing between individuals and groups of users, which enable sharing and searching for digital content information, and exchanging via P2P communication such information. However, P2P applications are still difficult to program and to efficiently deploy in real network infrastructures and usually have network efficiency problems. A part from intrinsic difficulties of P2P algorithmics, there are difficulties in efficiently tuning P2P applications in real environments. Indeed, P2P applications usually involve many parameters, whose values cannot be arbitrarily fixed but require a careful tuning to achieve expected performance. In this work, we show by example of a P2P JXTA-based platform, how to tune the parameters of the platform using existing software tools (JConsole and JHat) and enhance its performance.
Investigation of children's characteristics for web browsing
Authors: Mayu Iwata, Yuki Arase, Takahiro Hara, Shojiro Nishio
Venue: Proceeding of the eleventh international workshop on Web information and data management (2009)

Owing to the proliferation of Internet environment, young children have started accessing the Web. However, most existing pages are oriented for grown-ups. Particularly, children are not good at browsing Web pages with full of characters, such as news site. Though such general pages have variety and detailed information than pages for children, children cannot understand their information in a current presentation style. In this paper, we investigate children's characteristics on Web browsing. First, we implemented a Web browser for children, which converts general pages into a children-friendly presentation. Then, we conducted a user experiment to compare our browser with two conventional Web browsers. The result shows that dividing a Web page into contents and showing each of them with animations and changing difficult expressions into easy and friendly ones are effective to keep children's interest and help them to understand the contents.
Providing a Heuristic Method to Simplify Behaviour Authoring
Authors: Alvin Chew HouMing, Koh Kim Leng, Xu Ke
Venue: Proceedings of the 2009 Fifth International Joint Conference on INC, IMS and IDC (2009)

Behavior authoring for CGF (Computer Generated Force) character involve specifying how and when actions take place, such that autonomous interactive behaviors can be brought. To enable non-programmers to create such “behavior ontology”, a computer readable scenario framework called behavior editor is created to capture the semantics of a problem domain and make this scenario an active part of VR force decision making.
Coded diversity for cooperative MISO based wireless sensor networks
Authors: Asaduzzaman Asaduzzaman, Hyung Yun Kong
Venue: IEEE Communications Letters (2009)

Motivated by the recent works on cooperative MIMO, this letter presents a coded diversity based cooperative protocol for wireless sensor networks. In densely deployed sensor networks, nearby nodes form a cluster of virtual antenna array to provide independent fading paths. The source node encodes the information bits with any channel code and forwards a portion of the codeword towards the cooperating nodes. The source and the cooperating nodes transmit different portion of the codeword to achieve a coded diversity at destination. Analysis and simulation show that our proposal can achieve full diversity when code rate is below a certain threshold.
Practical Interdomain Routing Security
Authors: Rick Kuhn, Simon Liu, Hart Rossman
Venue: IT Professional (2009)

This article reviews risks and vulnerabilities in interdomain routing and best practices that can have near-term benefits for routing security. It includes examples of routing failures and common attacks on routers, and countermeasures to reduce router vulnerabilities.
A lava flow simulation model for the development of volcanic hazard maps for Mount Etna (Italy)
Authors: M. L. Damiani, G. Groppelli, G. Norini, E. Bertino, A. Gigliuto, A. Nucita
Venue: Computers Geosciences (2006)

Volcanic hazard assessment is of paramount importance for the safeguard of the resources exposed to volcanic hazards. In the paper we present ELFM, a lava flow simulation model for the evaluation of the lava flow hazard on Mount Etna (Sicily, Italy), the most important active volcano in Europe. The major contributions of the paper are: (a) a detailed specification of the lava flow simulation model and the specification of an algorithm implementing it; (b) the definition of a methodological framework for applying the model to the specific volcano. For what concerns the former issue, we propose an extended version of an existing stochastic model that has been applied so far only to the assessment of the volcanic hazard on Lanzarote and Tenerife (Canary Islands). Concerning the methodological framework, we claim model validation is definitely needed for assessing the effectiveness of the lava flow simulation model. To that extent a strategy has been devised for the generation of simulation experiments and evaluation of their outcomes.
Comparison of tightly power-constrained performances for opportunistic amplify-and-forward relaying with partial or full channel information
Authors: Jung-Bin Kim, Dongwoo Kim
Venue: IEEE Communications Letters (2009)

In this letter, we present exact statistical expressions for opportunistic amplify-and-forward (AF) relaying under a tight power constraint, where a best relaying node is selected based on partial channel information (PCI) or full channel information (FCI), respectively. Based on the statistical analysis, we compare PCI with FCI strategy in terms of outage and average capacity. Numerical investigation shows that, as the number of candidate relays increases, the performances with FCI are continuously improved while those improvements with PCI are bounded. However, for the small number of the relays at a low SNR region, PCI and FCI achieve very similar performances. The numerical results also show that the relaxed power constraint that ignores the noise power at the relay leads to significant deviations from the tight constraint, which is the more reasonable one, especially in computing the outage with FCI.
A Model Analyzing Method for OWL-S Services Composition Based on High Level Petri Net
Authors: Shaoran Dong, Zengzhi Li
Venue: Proceedings of the 2009 Second International Symposium on Knowledge Acquisition and Modeling - Volume 01 (2009)

To analyze model of Web Services composition, firstly analyze and abstract dataflow and control construct in OWL-S process to build High Level Petri Net model, then describe Petri Net in Poses++ language, at last simulate Petri Net with Poses++ to check data type and deadlock and calculate service performance. The experiment shows that this model analyzing method is able to accomplish type checking and deadlock and performance analyzing.
Bayesian judgment of a dichotomous inspection system when the true state of an evaluated item is unknown
Authors: Roberto da Costa Quinino, Linda Lee Ho, Anderson L. G. Trindade
Venue: Computers and Industrial Engineering (2005)

In the quality control of attributes, the evaluation of conforming items is an important task. An inspection system, in a general sense, is not free of errors. Two types are possible: an item is classified as non-conforming when it is conforming, or an item is classified as conforming when it is truly non-conforming. In this paper, a Bayesian method is proposed to judge the efficiency of a new inspection system based on repeated classifications performed on the evaluated items when their true state is not known.
A taxonomy of ETL activities
Authors: Panos Vassiliadis, Alkis Simitsis, Eftychia Baikousi
Venue: Proceeding of the ACM twelfth international workshop on Data warehousing and OLAP (2009)

Extract-Transform-Load (ETL) activities are software modules responsible for populating a data warehouse with operational data, which have undergone a series of transformations on their way to the warehouse. The whole process is very complex and of signifi-cant importance for the design and maintenance of the data ware-house. A plethora of commercial ETL tools are already available in the market. However, each one of them follows a different ap-proach for the modeling of ETL activities; i.e., of the building blocks of an ETL workflow. As a result, so far there is no standard or unified approach for describing such activities. In this paper, we are working towards the identification of generic properties that characterize ETL activities. In doing so, we follow a black-box approach and provide a taxonomy that characterizes ETL activities in terms of the relationship of their input to their output and provide a normal form that is based on interpreted semantics for the black box activities. Finally, we show how the proposed taxonomy can be used in the construction of larger modules, i.e., ETL archetype patterns, which can be used for the composition and optimization of ETL workflows.
Signal detection for distributed space-time block coding: 4 relay nodes under quasi-synchronisation
Authors: F.-C. Zheng, A. G. Burr, S. Olafsson
Venue: IEEE Transactions on Communications (2009)

Most research on Distributed Space-Time Block Coding (D-STBC) has so far focused on the case of 2 relay nodes and assumed that the relay nodes are perfectly synchronised at the symbol level. This paper applies STBC to 4-relay-node systems under quasi-synchronisation and derives a new detector based on parallel interference cancellation, which proves to be very effective in suppressing the impact of imperfect synchronisation.
Performance evaluation of energy efficient ethernet
Authors: P. Reviriego, J. A. Hernández, D. Larrabeiti, J. A. Maestro
Venue: IEEE Communications Letters (2009)

Until very recently, energy efficiency has received little attention in many wired communications environments. For example, in most current Ethernet standards the transmitter and receiver operate at full power even when no data is being sent. However, new upcoming energy-aware standards, such as Energy Efficient Ethernet (EEE), are addressing this issue by introducing a low power mode for idle link intervals. The future EEE standard defines the procedure to enter and exit the low power mode. With EEE the actual energy savings will depend on the amount of traffic and on the timing of the frame arrivals. In this paper the performance of EEE in terms of energy saving is evaluated. The results show that although EEE improves the energy efficiency, there is still potential for substantial further energy savings as in many cases most of the energy is wasted in waking up and sleeping the link.
A C++ program for retrieving land surface temperature from the data of Landsat TM/ETM+ band6
Authors: Jinqu Zhang, Yunpeng Wang, Yan Li
Venue: Computers Geosciences (2006)

A C++ language-based software tool for retrieving land surface temperature (LST) from the data of Landsat TM/ETM+ band6 is developed. It has two main functional modules: (1) Three methods to compute the ground emissivity based on land use/cover classification image, NDVI image and the ratio values of vegetation and bare ground and (2) Converting digital numbers (DNs) from TM/ETM+ band6 to LST. In the software tool, Qin et al.'s mono-window algorithm and Jimenez-Munoz and Sobrino's single channel algorithm are programmed to retrieve LST. It will be a useful software tool to study the thermal environment of ground surface or the energy balance between the ground and the bottom atmosphere by using the thermal band of Landsat TM/ETM+.