Miracle-dz/UniFAR-FTUs huggingface dataset:
Gestion des Risques dans les Infrastructures VoIP

La telephonie sur IP est devenue un nouveau paradigme pour etablir et transmettre les communications telephoniques directement sur les reseaux IP de maniere flexible et a faible cout. Toutefois, les services VoIP sont confrontes a plusieurs problemes de securite qui sont soit herites de la couche IP soit specifiques au service lui-meme. Une grande variete de mecanismes de protection est disponible pour y faire face. Cependant, ces services necessitent des performances et une disponibilite du reseau eleve, et les mecanismes de protection peuvent nuire a ces performances. La gestion des risques offre de nouvelles perspectives a l'egard de cette problematique. Nos contributions portent sur l'application et l'automatisation de la gestion de risques dans les infrastructures VoIP selon trois axes. Le premier axe porte sur l'automatisation du processus de gestion des risques dans un reseau VoIP d'entreprise. Dans ce cadre, nous avons developpe un modele pour evaluer les risques, un ensemble de contremesures progressives et des algorithmes de mitigation. Nous l'avons couple a un systeme de detection d'anomalies base sur les SVM et un mecanisme d'auto-configuration qui peut fournir un retour d'experience sur l'efficacite des contremesures. Le deuxieme axe concerne l'extension de notre strategie dans les reseaux P2PSIP. Nous avons mis en place une solution adaptee a la nature distribuee des environnements pair-a-pair. Nous nous sommes aussi interesses a l'architecture RELOAD et avons etudie comment traiter les attaques residuelles a travers des mecanismes de confiance. Nous avons enfin etudie les services VoIP dans le cloud ou nous proposons plusieurs strategies pour le deploiement et l'application des contremesures
Frequency diversity array: theory and design

This thesis presents a novel concept of beam scanning and forming by employing frequency diversity in an array antenna. It is shown that by applying a linear frequency shift to the CW signals across the elements, a periodically scanning beam pattern is generated and the main beam direction is a function of time and range. Moreover, when transmitting a pulse signal, the frequency diversity array (FDA) can be used for beam forming in radar applications. These properties offer a more flexible beam scanning and forming option over traditional phase shifter implementations. The thesis begins with the discussion on FDA’s array factor. It is mathematically proven that the array factor is a periodic function of time and range and the scanning period itself is a function of the linear frequency shift. Then further discussion is made when a pulsed signal is transmitted by an FDA. The requirement on the pulse width for a certain linear frequency shift is specified and corresponding signal processing technique is provided for the frequency diverse signal receiver. The thesis subsequently goes on to an electromagnetic simulation of FDA. The CST Microwave Studio is utilized to model the FDA and simulate its transient field, which allows one to verify the relationship between the scanning period and the linear frequency shift. Finally, the implementation of FDA is considered with the focus laid on the generation of the required frequency diverse signals complying with the two basic assumptions. The PLL frequency synthesis technique is introduced as an effective approach of generating the frequency diverse signals. One low cost and profile design of integer-N frequency synthesizer is presented to illustrate the basic design considerations and guidelines. For comparison, a Σ − Δ fractional-N frequency synthesizer produced by Analog Device is introduced for designs where more budget is available.
The Effects of Automatic Emergency Braking on Fatal and Serious Injuries

The introduction of automatic emergency braking changes the distribution of impact severity thus the resulting injury risk. In the calculation of the possible safety impact, risk functions must be used. These functions can be derived in different ways. In this study, matched pair techniques have been used to study if the power models developed by Nilsson can be used. By applying the risk functions on theoretical changes of impact speed as a result of pre impact braking, the possible effectiveness on fatal and serious injuries can be estimated. It was found, that such braking can offer major benefits. A reduction of speed before impact of 10 % can reduce fatal injuries in car crashes by approximately 30 %. The full text of this paper may be found at: http://www-nrd.nhtsa. dot.gov/pdf/esv/esv21/09-0419.pdf For the covering abstract see ITRD E145407.
Momentum measurements of single-beam traps and quantitative holographic experiments: two sides of the same coin

After an intense development of optical tweezers as a biophysical tool during the last decades, quantitative experiments in living cells have not found in this technique its best ally, due, in part, to the lack of a reliable method to measure forces in complex environments. The attempts to overcome this problem either require complicated in situ calibrations, which make their use impossible in the study of dynamic processes, or they are inaccurate. Using a different approach, Steven Smith at Carlos Bustamante’s lab at the University of Berkeley developed a method based on the direct measurement of the momentum change of the trapping beam. However, its diffusion has been modest mainly because it requires a counter-propagating optical trapping system, which is difficult to implement and combine with other techniques. Although it has not been used for this purpose yet, it seems a more suitable method for in vivo experiments since the measurement depends only on some properties of the sensor apparatus but not on the experiment itself. On the other hand, the use of holographic optical tweezers in molecular biology experiments involving force and position measurements is still far from established. The existence of different effects associated to the use of spatial light modulators to create the optical traps has restricted their use. In this thesis, I present the work that I carried out in the Optical Trapping Lab – Grup de Biofotonica at the University of Barcelona related to these two subjects. During these years, I have focused on the implementation of the force detection method based on the conservation of the light momentum in single-beam optical traps, and on the analysis of several aspects of holographic tweezers oriented to their use in quantitative experiments.
Searching for needles in a haystack: Three essays on the role of R&D partnerships in the bio-pharmaceutical industry

This dissertation examines the relationships of established and young startup firms in environments characterized by rapid technological change in which exploration, i.e., moving away from current organizational routines and knowledge bases, is crucial for success. In the first essay, I combine perspectives on organizational myopia and organizational learning to examine how prior successes and prior failures solving R&D problems shape whether established firms go beyond "local search" in partnerships formations with startup firms. In line with the myopia perspective, I find that established firms tend to "overlook" partnering opportunities with novel elements of knowledge as well as opportunities that do not promise payoffs in the immediate future. The study further reveals that prior successes and failures very differently shape these myopic tendencies. While prior failures lead firms to pursue partnerships with novel elements of knowledge, prior successes make firms more receptive to partnerships with payoffs in the distant future. In the second essay, I draw on the literature on organizational learning and inter-organizational partnering to examine the relationship between startup innovation and startup market valuations. I find that startups pursuing innovations that substantially differ from the solutions pursued by established firms may face severe market value penalties as they lack both legitimacy and access to vital complementary assets. This penalty, however, is attenuated if startups commercialize their innovations through partnerships or if they pursue innovations in areas where established firms have failed in their own internal R&D attempts. The final essay draws on the literature on inter-organizational learning to more closely examine the ways in which established firms leverage the knowledge accessed from startup firms. I focus on loosely coupled partnerships that involve established firms paying a research partner for access to specific knowledge. While prior research has questioned the ability of firms to devise new and innovative solutions based on such partnerships, I find that innovation benefits from loosely coupled partnerships do not necessarily stem from the sourcing relationship per se but instead are contingent on the established firm's experimental orientation to pursuing risky projects and its availability of financial and managerial resources. Overall, my dissertation enriches our understanding of the unique interdependencies between established and startup firms in environments characterized by rapid technological change. Degree Type Dissertation Degree Name Doctor of Philosophy (PhD) Graduate Group Management This dissertation is available at ScholarlyCommons: http://repository.upenn. edu/edissertations/652 First Advisor Raphael Amit
EVALUATION OF INPUT SHAPING ON CONFIGURATION DEPENDENT SYSTEMS

Input shaping is a method for controlling residual vibration in linear systems. Because input shaping can be made robust to errors in the estimation of the system’s frequencies, it has possible applications on some types of nonlinear systems. The effectiveness of input shaping is investigated on a nonlinear model of a flexible, two-link robotic arm. Results indicate that shaping is very effective when the system has small frequency variations. When the system experiences large frequency changes, shaping still provides significant vibration reduction.
Piezoelectric strain sensor

This paper describes the construction and performance of a recently introduced piezoelectric strain sensor (Model 740A02). The sensor incorporates a quartz sensing element with microelectronic signal conditioning. The integral electronics permits sensor operation with standard 2-wire ICP signal conditioning commonly found in vibration aboratories. The sensor can resolve signals smaller than 1 e (1e-g in/in), which is 3 orders of magnitude better resolution than a standard resistive strain gauge.
Network Security Toolkit Including Heuristic Solutions for Trust System Placement and Network Obfuscation

Abstract : For Part I, a supervisory control and data acquisition (SCADA) network consists of a group stations and substations in a portion of the power grid. The use of Internet technology in SCADA communications as well as other factors has caused vulnerabilities. One idea to help mitigate this risk is to strategically place trust nodes to compartmentalize and secure the SCADA systems without disturbing its finely honed processes. The trust nodes combine firewall and intrusion detection technology to provide more secure communication. An optimal solution to this problem has already been developed using a mixed-integer linear programming model. Because the problem is provably NP-Hard, a heuristic solution is presented in this part. The heuristic can find good, but not optimal, solutions. Experiments are promising that the proposed heuristic technique is close to optimal while arriving at results much quicker. For Part II, dynamically modifying the defense structure could be used to prevent adversaries from gathering intelligence, seriously inhibiting their ability to conduct attacks successfully. Work has already been done using a mixed-integer linear programming model (MILPM) to solve the multi-commodity capacitated network design problem (MCNDP) to create dynamically change routes and possibly topologies within a network. Information flows in the network can be periodically routed on different paths through the network so that traffic patterns change and adversaries have to work much harder to map the network. The MILPM solution offers a good baseline for caparison of any heuristic trying to solve the same problem. In this part, a heuristic approach to network obfuscation is proposed. The heuristic shows favorable results when compared to the MILPM solution.
Techniques and methodologies for the migration of legacy systems to object-oriented platforms

Over the past years it has become evident that the benefits of object orientation warrant the design and development of reengineering methods that aim to migrate legacy procedural systems to modern object oriented platforms. However, most of the research in this direction focuses on the extraction of an object model from the legacy procedural code without taking into account quality requirements for the target migrant system. This thesis presents a reengineering framework that allows for quality requirements of the target system to be modelled as soft-goals, and transformations to be applied selectively towards achieving specific quality requirements for the target system. In this context, the migration process is denoted by a sequence of transformations each one of which alters the state of the system being migrated. A state transition system and the Viterbi algorithm are used to identify the optimal sequence of transformations that can be applied at any given state of the migration process. To deal with large software systems, a system can be decomposed into a collection of work areas. The reengineering framework can be applied incrementally to each of the work areas. Furthermore, a technique that allows for the integration of the migrant systems with other third party applications in a Web enabled environment is presented. A reengineering toolkit to automatically migrate a set of open source procedural systems, such as Apache, Bash and Clips to an object oriented platform has been developed using the theory presented in this thesis. The obtained results demonstrate the effectiveness and usefulness of the proposed incremental quality driven migration technique.
Sustainability assessment of towers for wind turbines

The increasing world energy demand during last few decades has led wind power installed capacity to a significant growth. Wind power is a renewable resource, which means using it will not deplete the earth's supply of fossil fuels. It is also a clean energy source, and operation does not produce carbon dioxide or any other type of air pollution, as do conventional fossil fuel power sources. However, there is an environmental impact associated dominantly during the production and dismantling. During manufacture of the wind turbine, steel, concrete and other materials will have to be made and transported using energy-intensive processes, generally using fossil energy sources. Several studies demonstrate that among the different parts conforming a wind plant, tower+foundation are the most energy intensive components. A sustainability assessment of a “virtual” tower for wind turbines, 100m hub height with a assumed 3.6 MW capacity wind turbine is made focusing on the embodied CO2 equivalent emissions and energy consumed in production and execution of the towers. A comparison between the two most common types of tower is done: tubular steel tower and prestressed concrete tower. Data on generation of electrical energy from the wind power is evaluated for various countries and simple assessment is made to get estimation of the equivalent CO2 per MW·h of produced electricity. Load tables are commonly provided by the turbine producers when a specific tower design is made. However, a single horizontal force at the hub height is used as an approximation of an equivalent characteristic load for ultimate limit state. Fatigue damage is assessed in the same way decreasing the considered load by a reasonable factor.
Knowledge Management on a Global Scale

Building and using knowledge bases have become widespread in the customer support area, where the need is great and the potential benefit is high. While customer support has become a focal point for knowledge creation and use, other departments in an organization are now contributing to, and retrieving knowledge from, the knowledge bases being developed. These knowledge bases are becoming more corporate-wide repositories, with some companies even making the knowledge directly available to customers and consumers. CBR has become a useful tool to provide the representational framework and the search mechanism for these knowledge bases. As companies desire to create and distribute these knowledge bases globally, a number of key issues in authoring, distributing, localizing, maintaining and managing the whole process have been successfully addressed.
Data Collection Methods: Semi-Structured Interviews and Focus Groups

Abstract : The authors developed a short course of introductory qualitative research methods to help the lessons learned organizations in the police community improve their data collection techniques. This document provides an annotated version of the course material. It should be of interest to research professionals interested in qualitative research methods. This research was conducted within the Intelligence Policy Center of the RAND National Defense Research Institute, a federally funded research and development center sponsored by the Office of the Secretary of Defense, the Joint Staff, the Unified Combatant Commands, the Department of the Navy, the Marine Corps, the defense agencies, and the defense Intelligence Community. The authors of this work are Margaret Harrell and Melissa Bradley.
Hierarchical Bayesian Models and their Implementation in Multivariate Disease Mapping

La crescente disponibilitAƒÂ di dati georeferenziati implica anche lo sviluppo di opportuni metodi di analisi spaziale multivariata. Nel presente lavoro si propone una nuova classe di modelli generalizzati multivariati condizionatamente autoregressivi per lo studio della distribuzione geografica del rischio di malattia, quando le patologie considerate siano due o piAƒÂ¹. LA¢Â€Â™approccio sarAƒÂ illustrato facendo riferimento sia allA¢Â€Â™analisi di dati puntuali, sia utilizzando dati aggregati per piccole unitAƒÂ amministrative (contee).
Infrastructure Management and Deterioration Risk Assessment of Wastewater Collection Systems

ii List of Figures . x List of Tables . xiii Chapter 1 – Introduction . 1 1.1 Problem Statement and Objectives . 1 1.2 Research Methodology . 2 1.3 Organization of the Dissertation . 3 Chapter 2 – Literature Review . 5 2.
Terrorist web sites: their contents, functioning and effectiveness

Author Bio. Maura Conway is a PhD candidate in the Department of Political Science at Trinity College Dublin, Ireland, and a teaching fellow in the School of International Relations at the University of St. Andrews, Scotland. Her research interests are in the area of terrorism and the Internet. She has published in Current History, First Monday, the Journal of Information Warfare, and elsewhere. _____________________________________________________________________
Application of In-Pipe Visual Inspection Robot to Piping Internal Surface Lining

In most cases, it is difficult for inspectors to directly inspect the extent of contamination and damage to the internal surfaces of small diameter pipes, as access to the inside of these pipes is limited due to size of devices and associated in-pipe environmental conditions. Accordingly, the utilization of remote-controlled inspection technologies promises great advantages for such inspections. We thus implemented research on in-pipe remote-controlled inspection technologies, and developed a crawler-type, self-propelled traveling device. Subsequently, we used such a device for the visual inspections of the internal surfaces of the seawater piping at a nuclear power plant before and after periodical lining maintenance was conducted on this pipe, thereby allowing the schedule to be shortened by about 40%, and also permitting the cost involved to be reduced by about 30 40%. Accordingly, we feels that the adoption of this remote-controlled inspection technology per this report, will bring great benefits to the user. 1. Preface At the above nuclear power plant, embedded piping whose internal surface was lined was periodically replaced with new piping, in order to maintain its in-service safety assurance. We visually inspected the damage to the lining of such piping using an in-pipe traveling inspection robot (Fig. 1) and found that the piping could he re-used if the internal surface was relined. Accordingly, the surface of the piping was re-lined in place using a turning seal lining method. As a result, the schedule was shortened by about 40% and also the cost involved was cut by about 30 40%. Thus, JGC introduces an outline of this turning seal lining method and the lining work as follows: 2. Turning seal lining method The following are procedures for lining the internal surface of piping usinq the method adopted by us. f
EVA space construction - Experience and fundamental issues

Results are presented from EVA space construction studies performed in 1 g, simulated 0 g, and on-orbit. The studies include tests of astronaut participation on the Mobile Work Station concept and the Swing-Arm Beam Erector. Also, results from the Experimental Assembly of Structures in EVA and the Assembly Concept for Construction of Erectable Space Structure programs are summarized. EVA construction applications for the Space Station are discussed and construction scenarios are developed.
Anti-Sway Control and Wave Following System for Offshore Lattice Crane

Offshore crane operation is a complex task that demands the operator to control the position of the load, predict vessel motion and compensate for load sway, all at the same time. In this thesis an anti-sway, boom tip positioning and a wave following system is presented which purpose is to facilitate not automate the crane operation. Introducing such systems the operator has an extra set of tools to reduce risk of cargo damage and personnel injuries during operation. This is done by suppressing the sway angles and positioning the boom tip to a desired position with the anti-sway and boom tip positioning system, and be able to make the hook follow the heave motion of the vessel by using the wave following system. This thesis contains modeling, visualization, simulation and control of a rotary crane with spherical pendulum. Also models for a trolley with pendant load, vessel motion, and angular deflection of the wire and a wind model is presented. Lagrangian describes the dynamics of the crane models and the equation of motion is derived with Euler-Lagrange equations. The effect of measurement noise in the sensor signals has been reduced through the implementation of an adaptive Kalman-filter. Parameter estimation has been used to find unknown model parameters such as damping, frequency and bias in vessel heave motion model. Several suggestions of sensors to measure the swing angles of the hoist winch wire is presented. The 3D visualization is developed using the V-Realm 3D editor included in Simulink 3D Animation toolbox. Results of the closed loop system shows that it is possible to control the load swing angles and boom tip position and still let the crane operator have the superior control of the crane. In case of stability it can be seen that since all friction terms is neglected in the mathematical model there is no dissipation of energy in the pendulum dynamics, meaning that the anti-sway controller causes any observed damping in the sway dynamics.