Application of UPFC for system security improvement under normal and network contingencies

Electric power systems are exposed to various contingencies. Network contingencies often contribute to over-loading of network branches, unsatisfactory voltages and also leading to problems of stability/voltage collapse. To maintain security of the systems, it is desirable to estimate the effect of contingencies and plan suitable measures to improve system security/stability. This paper presents an approach for selection of unified power flow controller (UPFC) suitable locations considering normal and network contingencies after evaluating the degree of severity of the contingencies. The ranking is evaluated using composite criteria based fuzzy logic for eliminating masking effect. The fuzzy approach, in addition to real power loadings and bus voltage violations, voltage stability indices at the load buses also used as the post-contingent quantities to evaluate the network contingency ranking. The selection of UPFC suitable locations uses the criteria on the basis of improved system security/stability. The proposed approach for selection of UPFC suitable locations has been tested under simulated conditions on a few power systems and the results for a 24-node real-life equivalent EHV power network and 39-node New England (modified) test system are presented for illustration purposes.

Foreign Direct Investment in Agriculture: Land Grab or Food Security Improvement?

“Large-scale acquisition of land by foreign investors” is the correct term for a process where the verdict of guilt is often quicker than the examination. But is there something really new about land grab except in its extent? In comparison with colonial and post-colonial plantation operations, should foreign investors today behave differently? We generally accept coffee and banana exports as pro-growth and pro-development, just as for cars, beef and insurance. What then is wrong with an investment contract allowing the holder to buy a farm and to export wheat to Saudi Arabia, or soybeans and maize as cattle feed to Korea, or to plant and process sugar cane and palm oil into ethanol for Europe and China? Assuming their land acquisition was legal, should foreigners respect more than investment contracts and national legislation? And why would they not take advantage of the legal protection offered by international investment law and treaties, not to speak of concessional finance, infrastructure and technical cooperation by a development bank, or the tax holidays offered by the host state? Remember Milton Friedman’s often-quoted quip: “The business of business is business!” And why would the governments signing those contracts not know whether and which foreign investment projects are best for their country, and how to attract them? This chapter tries to show that land grab, where it occurs, is not only yet another symptom of regulatory failures at the national level and a lack of corporate social responsibility by certain private actors. National governance is clearly the most important factor. Nonetheless, I submit that there is an international dimension involving investor home states in various capacities. The implication is that land grab is not solely a question whether a particular investment contract is legal or not. This chapter deals with legal issues which seem to have largely escaped the attention of both human rights lawyers and, especially, of investment lawyers. I address this fragmentation between different legal disciplines, rules, and policies, by asking two basic questions: (i) Do governments and parliaments in investor home countries have any responsibility in respect of the behaviour of their investors abroad? (ii) What should they and international regulators do, if anything?

Perspectivas teórico-políticas para la construcción de una agenda bilateral de seguridad colombo-canadiense: comprendiendo la preocupación de Canadá en la seguridad y la paz en Colombia

Este artículo intenta explorar las razones estratégicas y éticas de la preocupación de Canadá en el proceso de construcción de paz y el mejoramiento de la seguridad en los países del Tercer Mundo, especialmente en Colombia. La investigación sugiere que no solo la relación estratégica con los Estados Unidos sino también la necesidad de consolidar su liderazgo internacional, junto con sus preocupaciones liberales, sustentan la naturaleza de la agenda de seguridad de Canadá en estos países. Al explicar estas razones, el artículo esboza una estructura de análisis para construir una agenda bilateral de seguridad entre Canadá y Colombia.La investigación se enmarca en una perspectiva analítica y teórico-política particular. Aquella reconoce la importancia significativa de las “ideas” en los procesos de toma de decisión, así como la necesidad de paliar el enorme desconocimiento sobre las relaciones entre Colombia y Canadá a través de un sustento teórico. La influencia de las ideas en la construcción de la agenda de seguridad es explorada por medio de tres mapas de ruta, que pueden ayudar a coordinar los propósitos de ambos países en relación con la construcción de paz y de seguridad en Colombia. En primer lugar, los mapas de ruta más emblemáticos para explicar y prescribir la actuación internacional de los países del Primer Mundo, el realismo y el liberalismo, son evocados para entender las preocupaciones centrales de la seguridad nacional canadiense y su posición ética en el ámbito internacional. En segundo lugar, el mapa de ruta, que ha sido articulado por la literatura sobre la seguridad del Tercer Mundo, es planteado como una guía para organizar las principales preocupaciones en materia de seguridad en Colombia. Al reconocer que las amenazas que deben ser enfrentadas por el Estado colombiano, sus instituciones y su sociedad son típicas de un país en construcción, es posible entender la pertinencia de ciertas estrategias canadienses, sustentadas en concepciones amplias de seguridad, tales como la seguridad humana, que ha sido concebida justamente para tratar la naturaleza compleja de la seguridad del Tercer Mundo.-----This article attempts to explore the strategic and ethic reasons of Canada’s concern about the peace-building process and the security improvement in the Third World countries and, especially, in Colombia. Our research suggests that not only the strategic relation with the United States but also the necessity of strengthening its international leadership, along with its liberal concerns, support the nature of the Canada’s security agenda in these countries. By explaining these reasons, this document draws a potential framework for building a bilateral security agenda between Canada and Colombia.Our research is framed on a singular analytical, political and theoretical perspective. It recognizes the significant importance of the “ideas” for the decision-making process, as well as the necessity of reducing the huge ignorance on security relations between Colombia and Canada through a theoretical framework. The influence of the ideas in the building of the security agenda is explored taking into account three road maps, which could help to coordinate both countries’ purposes related to peace-building process and security improvement in Colombia. In the first place, the most emblematic road maps to explain and to prescribe the First World countries’ international behavior, realism and liberalism, are evocated to understand the main concerns of Canadian national security and its ethics stand in the international realm. In the second place, the road map, which has been articulated by the literature on Third World security, is shown as a guide for organizing the main security concerns in Colombia. By recognizing that the threats that must be faced by Colombian state, institutions and society are typical of a Third World country, it is possible to understand the appropriateness of certain Canadian strategies, which are supported on a broader security approach, such as human security, and that has fairly been considered for facing the complex nature of the Third World security.

An Interleaved EPE-Immune PA-DPL Structure for Resisting Concentrated EM Side Channel Attacks on FPGA Implementation

Early propagation effect (EPE) is a critical problem in conventional dual-rail logic implementations against Side Channel Attacks (SCAs). Among previous EPE-resistant architectures, PA-DPL logic offers EPE-free capability at relatively low cost. However, its separate dual core structure is a weakness when facing concentrated EM attacks where a tiny EM probe can be precisely positioned closer to one of the two cores. In this paper, we present an PA-DPL dual-core interleaved structure to strengthen resistance against sophisticated EM attacks on Xilinx FPGA implementations. The main merit of the proposed structure is that every two routing in each signal pair are kept identical even the dual cores are interleaved together. By minimizing the distance between the complementary routings and instances of both cores, even the concentrated EM measurement cannot easily distinguish the minor EM field unbalance. In PA- DPL, EPE is avoided by compressing the evaluation phase to a small portion of the clock period, therefore, the speed is inevitably limited. Regarding this, we made an improvement to extend the duty cycle of evaluation phase to more than 40 percent, yielding a larger maximum working frequency. The detailed design flow is also presented. We validate the security improvement against EM attack by implementing a simplified AES co-processor in Virtex-5 FPGA.

Improvement of Food Security in Bangladesh through Socio-Economic Empowerment of Women

Empowerment is one possible approach to increase political, social and economic participation of a target group and thus decrease food insecurity among vulnerable people. The objective of this research was to evaluate a socio-economic empowerment project implemented for 8 years in rural northern Bangladesh by using secondary data from 2000 and primary data from 2009. Three hundred women were primarily selected out of all existing and active 121 women groups formed during 8 years project implementation. Standardized interviews were conducted to collect quantitative data. In addition an overall qualitative analysis included focus group discussions, the review of project summaries and discussions with implementing staff. Data was collected on socio-economic status, rice storages and food consumption. In addition knowledge was gained on current activities of the women groups. The empowerment concept implemented in this setting was successful to increase the participants’ political, social and economic engagement and visibility. Apart from that the utilization of skills for income generation led to an improvement of the socio-economic status and food insecurity became less common. Recommendations for future projects include the increase of female members among the NGO staff as well as the further follow-up and strengthening of political acceptance and visibility of the empowered participants to sustain the outcome of the project.

Social Security Trust Fund Integrity and Benefits Improvement Act of 1991 : hearing before the Subcommittee on Social Security of the Committee on Ways and Means, House of Representatives, One Hundred Second Congress, first session, on H.R. 2838 ... September 17, 1991.

"Serial 102-58."

Improvement in Intrusion Detection With Advances in Sensor Fusion

Various intrusion detection systems (IDSs) reported in the literature have shown distinct preferences for detecting a certain class of attack with improved accuracy, while performing moderately on the other classes. In view of the enormous computing power available in the present-day processors, deploying multiple IDSs in the same network to obtain best-of-breed solutions has been attempted earlier. The paper presented here addresses the problem of optimizing the performance of IDSs using sensor fusion with multiple sensors. The trade-off between the detection rate and false alarms with multiple sensors is highlighted. It is illustrated that the performance of the detector is better when the fusion threshold is determined according to the Chebyshev inequality. In the proposed data-dependent decision ( DD) fusion method, the performance optimization of ndividual IDSs is first addressed. A neural network supervised learner has been designed to determine the weights of individual IDSs depending on their reliability in detecting a certain attack. The final stage of this DD fusion architecture is a sensor fusion unit which does the weighted aggregation in order to make an appropriate decision. This paper theoretically models the fusion of IDSs for the purpose of demonstrating the improvement in performance, supplemented with the empirical evaluation.

Evaluation and improvement of generators reactive power margins in interconnected power systems

The amount of reactive power margin available in a system determines its proximity to voltage instability under normal and emergency conditions. More the reactive power margin, better is the systems security and vice-versa. A hypothetical way of improving the reactive margin of a synchronous generator is to reduce the real power generation within its mega volt-ampere (MVA) ratings. This real power generation reduction will affect its power contract agreements entered in the electricity market. Owing to this, the benefit that the generator foregoes will have to be compensated by paying them some lost opportunity cost. The objective of this study is three fold. Firstly, the reactive power margins of the generators are evaluated. Secondly, they are improved using a reactive power optimization technique and optimally placed unified power flow controllers. Thirdly, the reactive power capacity exchanges along the tie-lines are evaluated under base case and improved conditions. A detailed analysis of all the reactive power sources and sinks scattered throughout the network is carried out in the study. Studies are carried out on a real life, three zone, 72-bus equivalent Indian southern grid considering normal and contingency conditions with base case operating point and optimised results presented.

an improved smart card based password authentication scheme with provable security

Password authentication has been adopted as one of the most commonly used solutions in network environment to protect resources from unauthorized access. Recently, Lee–Kim–Yoo [S.W. Lee, H.S. Kim, K.Y. Yoo, Improvement of Chien et al.'s remote user authentication scheme using smart cards, Computer Standards & Interfaces 27 (2) (2005) 181–183] and Lee-Chiu [N.Y. Lee, Y.C. Chiu, Improved remote authentication scheme with smart card, Computer Standards & Interfaces 27 (2) (2005) 177–180] respectively proposed a smart card based password authentication scheme. We show that these two schemes are both subject to forgery attacks provided that the information stored in the smart card is disclosed by the adversary. We also propose an improved scheme with formal security proof.

an analysis for understanding software security requirement methodologies

IEEE Reliabil Soc, Shanghai Jiao Tong Univ

the study of trustworthy software process improvement model

Huazhong Univ Sci & Technol, Natl Tech Univ Ukraine, Huazhong Normal Univ, Harbin Inst Technol, IEEE Ukraine Sect, I& M/CI Joint Chapter

An Improvement of Subject Reacquisition by Reasoning and Revision

CCTV systems are broadly deployed in the present world. Despite this, the impact on anti-social and criminal behaviour has been minimal. Subject reacquisition is a fundamental task to ensure in-time reaction for intelligent surveillance. However, traditional reacquisition based on face recognition is not scalable, hence in this paper we use reasoning techniques to reduce the computational effort which deploys the time-of-flight information between interested zones such as airport security corridors. Also, to improve accuracy of reacquisition, we introduce the idea of revision as a method of post-processing.We demonstrate the significance and usefulness of our framework with an experiment which shows much less computational effort and better accuracy.