Bibliographies thématiques / Ldacs

Littérature scientifique sur le sujet « Ldacs »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Ldacs"

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Rippy, Kerry C., Emily Volk, Reagan Beers, Eric Kozubal, Kristin Gauderman et Judith Vidal. « Corrosion of Metal Alloys in Potassium Acetate Solutions for Liquid Desiccant Dehumidification and Air Conditioning ». Energies 15, no 12 (17 juin 2022) : 4421. http://dx.doi.org/10.3390/en15124421.

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For commercial buildings, liquid desiccant air conditioners (LDACs) could provide up to 80% energy savings compared to high-efficiency vapor compression AC, but commonly utilized liquid desiccants are highly corrosive. This precludes the use of metallic components, necessitating specialized plastics and thereby driving up cost, weight, and limiting operational temperature and pressure ranges. Less corrosive alternatives are sought. Here, potassium acetate solutions are investigated as less-corrosive alternatives to the chloride salt solutions that are typically used in LDAC systems. Corrosion evaluations for a Cu alloy (C12200) and two Al alloys (Al3003 and Al1100) in both potassium acetate and chloride salt solutions are presented. We show that yearly corrosion rates are lower in potassium acetate solutions by up to three orders of magnitude. Active corrosion behavior is largely absent in potassium acetate solutions but is present in chloride salt solutions. Furthermore, solid corrosion products are observed in chloride salt solutions. Thus, we conclude that potassium acetate is a promising candidate as a less corrosive alternative liquid desiccant for LDAC systems with metallic components.
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Li, Yang Teng Long, Min Yi Cen et Xuan Bai. « Study on Methods of Lateral Deviation of Track for Static Inspecting in High-Speed Railway ». Applied Mechanics and Materials 638-640 (septembre 2014) : 1195–206. http://dx.doi.org/10.4028/www.scientific.net/amm.638-640.1195.

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According to the critical factor of railway track geometric irregular, the deformations of track can be controlled. The lateral deviation is the key to determine the railway track irregularity. Currently, in the static inspected methods, the combined method of geodetic surveys and track surveying trolleys (inspecting instruments for static geometry parameter of track) is widely used in high-speed railway. Depending on some tests, the model of track irregularity in track surveying trolleys can be reconstructed by another method. According to the special features of track of high-speed railway, it is necessary to study on the accurate and effective lateral deviation algorithm which is suitable for the precise track inspection of high-speed railway. Based on some existing methods of construction layout in highway, the primary contents of this paper are: (1) reduces those methods to three algorithms, such as the Longitudinal Deviation Algorithm with Composite Simpson rule (LDACS), the Distance Function Algorithm of Newton’s method (DFAN) and Normal Perpendicular to Tangent Algorithm of Newton’s method (NPTAN), and (2) completes the algorithm steps of DFAN and NPTAN on circular curve, and proves the results of two algorithms on circular curve same, and (3) proposes the three algorithms to calculate lateral deviation and mileage of any rail detection points for inspecting the static geometric state of track in high-speed railway. Depending on some simulation data, the experimental results are: (1) the calculations of DFAN, NPTAN and LDACS, in which the number of subintervals of equal greater than or equal to five, meet the accuracy of the precise track detection of high-speed railway, and (2) the difference mileage and lateral deviation between DFAN and NPTAN are less than 0.001 mm, and (3) the efficiency of those algorithms is very considerable and the efficiency of DFAN is basically the same with NPTAN and higher than LDACS, and (4) the longer the transition curve is, the lower the efficiency and accuracy of DFAN and NPTAN are. The bigger the radius is, the higher the accuracy of LDACS is. According to the measurement data of the Chengdu Dujiangyan Railway Line (Cheng Guan Line), the above mentioned results of (1) and (2) can be proved correctly.
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Schnell, Michael, Ulrich Epple, Dmitriy Shutin et Nicolas Schneckenburger. « LDACS : future aeronautical communications for air-traffic management ». IEEE Communications Magazine 52, no 5 (mai 2014) : 104–10. http://dx.doi.org/10.1109/mcom.2014.6815900.

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Wang, Lei, Mingli Liu, Jin Zhang et Dongxia Li. « Adaptive Threshold Energy Detection Spectrum Sensing Method for L-Band Digital Aeronautical Communication System ». Security and Communication Networks 2022 (17 octobre 2022) : 1–7. http://dx.doi.org/10.1155/2022/4325515.

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Air travel is growing at an alarming rate. However, according to the latest research report by Eurocontrol on European aviation, the growth of air traffic will be limited by the available spectrum resources. As one of the means to provide air/ground (A/G) broadband communication, the L-band digital aeronautical communication system (LDACS) is becoming the preferred model for final deployment and has received continuous attention. Based on various spectrum measurement studies, the international civil aviation organization (ICAO) has identified multiple 1 MHz vacant bands between adjacent distance measuring equipment (DME) signals for LDACS. In order to improve spectrum efficiency, the concept of dynamic spectrum access (DSA) can be applied to the LDACS, which requires the use of spectrum sensing methods to detect the spectrum holes of DME users. In this paper, an adaptive threshold energy detection spectrum sensing method is proposed based on the characteristics of DME pulse signals. Firstly, the energy of the received signal is estimated to construct the detection statistics, and the equations of detection probability and false alarm probability are established. Secondly, the adaptive threshold is calculated using the maximum likelihood decision criterion under the assumption of a constant probability of false alarm. Thirdly, the detection statistic is compared to the adaptive threshold to determine the spectrum occupancy state in the decision-making stage. Finally, the result is transmitted back to the transmitter for the best spectrum resource allocation. According to the simulation analysis, the adaptive threshold energy detection-based sensing method outperforms the energy-difference detection method under low signal-to-noise ratio (SNR) conditions. Meanwhile, it has superior adaptability since the adaptive threshold can be adaptively changed according to the channel.
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Keshkar, Miziya, Raja Muthalagu, Abdul Rajak et Libin K. Mathew. « GAE and OBE Enhanced Interference Mitigation Techniques in LDACS ». Aerospace 9, no 1 (17 janvier 2022) : 45. http://dx.doi.org/10.3390/aerospace9010045.

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Interference mitigation in L-band digital aeronautic communication systems from legacy users is vital due to stringent safety requirements and steady-state increase in air traffic. This paper proposes an L-band digital aeronautic communication systems receiver prototype that employs nonlinear operations to reduce the interference from the prime interference contributor distance measuring equipment. The knowledge of genie-aided estimator and optimum Bayesian estimator is utilized to propose improved and low complexity nonlinear devices, such as a genie-aided estimator enhanced pulse peak attenuator, genie-aided estimator enhanced pulse peak limiter, joint genie-aided estimator enhanced pulse peak attenuator, joint genie-aided estimator enhanced pulse peak limiter, optimum Bayesian estimator enhanced pulse peak attenuator, optimum Bayesian estimator enhanced pulse peak limiter, joint optimum Bayesian estimator enhanced pulse peak attenuator and joint optimum Bayesian estimator enhanced pulse peak limiter. The performance of the proposed methods is compared with the classical pulse blanking in terms of the received bit error rate for different signal-to-noise ratios. The proposed genie-aided estimator enhanced methods exhibited SNR saving in the range of 2 to 2.5 dB at a bit error rate of 10−1. At the same BER, the proposed optimum Bayesian estimator enhanced methods achieved SNR saving in the range of 2.5 to 3 dB.
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Keshkar, Miziya, Raja Muthalagu et Abdul Rajak. « ROAD Statistics-Based Noise Detection for DME Mitigation in LDACS ». Applied Sciences 12, no 8 (8 avril 2022) : 3774. http://dx.doi.org/10.3390/app12083774.

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Interference mitigation in L-band Digital Aeronautic Communication Systems (LDACS) from legacy users is extremely important as any error in data retrieval of aeronautic communication can adversely affect flight safety. This paper proposes an LDACS receiver prototype which uses rank-ordered absolute differences (ROAD) statistics to detect the distance measuring equipment (DME) interference. The detected DME interference is reduced in the next stage by pulse blanking. The performance of the proposed ROAD pulse blanking method (ROAD PB) is compared with the existing interference mitigation methods which use the amplitude of the received signal for the detection of DME interference. In depth analysis of the obtained results affirms that the proposed ROAD value-based interference detection excels amplitude-based detection. For an SNR value of 0 dB, the proposed method of detection could achieve a 3% increase in terms of accuracy with a reduction of 4% in false alarms. With the advantage of ROAD statistics detection, the proposed ROAD PB could achieve an SNR saving of 2.7, 1.1, 0.7, 0.25 and 0.2 dBs at BER 10−1 in comparison with pulse blanking, Genie-aided estimation enhanced pulse peak attenuator (GAEPPA), GAE enhanced pulse peak limiter (GAEPPL), optimum Bayesien estimator enhanced pulse peak attenuator (OBEPPA) and OBE enhanced pulse peak limiter (OBEPPL). The comparative results show that the proposed ROAD pulse blanking outperformed the other techniques for the optimum threshold value of the operation.
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Filip, Alexandra, et Dmitriy Shutin. « Ambiguity Function Analysis for OFDM-Based LDACS Passive Multistatic Radar ». IEEE Transactions on Aerospace and Electronic Systems 54, no 3 (juin 2018) : 1323–40. http://dx.doi.org/10.1109/taes.2017.2780678.

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Shreejith, Shanker, Libin K. Mathew, Vinod A. Prasad et Suhaib A. Fahmy. « Efficient Spectrum Sensing for Aeronautical LDACS Using Low-Power Correlators ». IEEE Transactions on Very Large Scale Integration (VLSI) Systems 26, no 6 (juin 2018) : 1183–91. http://dx.doi.org/10.1109/tvlsi.2018.2806624.

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Agrawal, Niharika, Abhishek Ambede, S. J. Darak, A. P. Vinod et A. S. Madhukumar. « Design and Implementation of Low Complexity Reconfigurable Filtered-OFDM-Based LDACS ». IEEE Transactions on Circuits and Systems II : Express Briefs 68, no 7 (juillet 2021) : 2399–403. http://dx.doi.org/10.1109/tcsii.2021.3053367.

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Maurer, Nils, Thomas Graupl, Miguel A. Bellido-Manganell, Daniel M. Mielke, Alexandra Filip-Dhaubhadel, Oliver Heirich, Daniel Gerbeth et al. « Flight Trial Demonstration of Secure GBAS via the L-band Digital Aeronautical Communications System (LDACS) ». IEEE Aerospace and Electronic Systems Magazine 36, no 4 (1 avril 2021) : 8–17. http://dx.doi.org/10.1109/maes.2021.3052318.

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Thèses sur le sujet "Ldacs"

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Filip-Dhaubhadel, Alexandra [Verfasser]. « L-Band Digital Aeronautical Communication System (LDACS)-Based Non-Cooperative Passive Multistatic Radar for Civil Aviation Surveillance / Alexandra Filip-Dhaubhadel ». München : Verlag Dr. Hut, 2021. http://d-nb.info/1238423035/34.

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Zephirin, M. G. « Imperfect information and financial liberalization in LDCs ». Thesis, University of Warwick, 1990. http://wrap.warwick.ac.uk/34819/.

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This thesis examines the interest rate, market entry and credit decisions which banks are expected to make following financial liberalization. It uses analytic tools from information economics and industrial organization theory to consider the policy implications of behaviour which responds to the constraints of imperfect information. The financial markets of the Caribbean Commonwealth supply the stylized facts which inform the analysis. Chapter 1 introduces the topics treated. The financial liberalization hypothesis is based on the 1973 works of McKinnon and Shaw. Chapter 2 describes their characterization of market fundamentals and behaviour in LDCs. It discusses the descriptions of equilibrium, and the welfare implications of these equilibria, in models which analyze economies with similar fundamentals. Chapter 3 derives stylized facts from the descriptions of the economic institutions and financial systems of the four Caribbean countries whose banking behaviour we model. Chapter 4 analyzes deposit rate determination by banks in the long-run equilibrium of a search market. It posits that in long-run equilibrium depositors find it costly to switch banks because doing so requires that they forego improved service at their current banks. The inelastic deposit supply which results from these switching costs implies that monopsonistic deposit rates are a noncooperative equilibrium. It is argued that this facilitates tacit collusion among banks and that a deposit rate floor is the appropriate policy corrective. Chapter 5 argues that the enhancement of intermediation service responsible for depositor switching costs reflects the information banks acquire about customers and their ability to offer suitably tailored service. Chapter 6 considers bank entry into a market where established customers of certain value have switching costs. Entering banks attract new customers of lower expected value. If new banks are therefore unable to generate sufficient revenue to cover their fixed costs, they exit. This chapter argues that liberal entry policy is not sufficient to ensure competition. Chapter 7 develops a simple model of bank screening by loan size in one sector of an economy. It finds a sequential equilibrium in which low-risk borrowers , self-select by the choice of contracts with a loan size below that they demand at the interest rate for their risk class. In Chapter 8 the partial equilibrium model of Chapter 7 is embedded in a general equilibrium framework to demonstrate that the market equilibrium is not constrained Pareto efficient. It argues that subsidizing the highest interest rates will improve loan allocation while maintaining the separation induced by private contracts. Chapter 9 summarizes the main results and conclusions of the thesis.
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Hasan, Zeeshan. « Foreign debt rescheduling and private investment in LDCs ». Oberlin College Honors Theses / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1342204622.

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Mohammed, Nadir A. L. « Military expenditure in Sub-Saharan Africa : a comparative analysis and case study of the Sudan ». Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241043.

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Naz, Neelum. « The external environment of housing in the Third World ». Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266801.

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Villarosa, Francesco Notarbartolo di. « Blueprint and process approach in institutional development : a case study from a health project in Brazil ». Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359137.

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Mohieldin, Mahmoud. « On financial liberalisation in LDCs : the case of Egypt, 1960-93 ». Thesis, University of Warwick, 1995. http://wrap.warwick.ac.uk/4216/.

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This thesis deals with the issue of financial development in Egypt at the sectoral, macroeconomic and household levels over the period 1960-93. The thesis is organised in ten chapters, including a summary of the main results in chapter (10). Chapter (1) provides an introduction of the topics treated in the thesis and an overview of the main developments in the Egyptian economy during the study period. Chapter (2) reviews the theoretical literature and empirical studies on the main issues concerning financial development. Chapters (3) and (4) derive stylised facts from the discussion of the evolution of the financial system in Egypt. Chapter (3) assesses the structure, regulation and performance of the banking sector. Chapter (4) focuses on the Egyptian securities market, exploring its development since its establishment in 1883. Further it analyses the performance of the market using the main published indicators and highlights the impediments to its progress. Chapter (5) is concerned with the growing role of Islamic finance in both the formal and informal sectors in Egypt. After constructing a model to illustrate the distinctive characteristics of Islamic banking, the chapter investigates the role of Islamic banks and Islamic branches of conventional banks. The chapter also provides an analysis of the Informal Islamic Investment Companies which flourished in Egypt during the 1980s. Chapter (6) analyses the causes, measures and impact of financial repression in Egypt over the period 1960-90. The findings of this chapter indicate that financing the budget deficit was the main reason for repressing the financial sector. The chapter discusses the impact of the different repressive methods used including inflation tax, interest rate ceilings, high reserve requirements, directed credit schemes, regulation on the portfolio composition of banks, and government ownership of financial intermediaries. The government revenues from particular repressive measures such as inflation tax, seigniorage and interest rate ceilings were estimated for the whole study period and were substantial by most international standards. There follows a discussion of the main consequences of financial repression including capital flight, money substitution, the excessive use of inflation hedges and the thriving of informal financial transactions. Chapter (7) presents an econometric analysis of the impact of the real interest rate on saving, investment and economic growth in Egypt. The results of this analysis indicate that the real interest rate had a positive impact on financial saving, possibly through a portfolio shift. However its impact on total saving, investment and economic growth was insignificant. Chapters (8) and (9) are concerned with the issue of the coexistence of formal and informal financial sectors in rural Egypt. The analysis is based on a survey, of 200 households undertaken by the author in four Egyptian villages in the Nile delta. The methodology adopted and the description of the surveyed region are reported in chapter (8). The findings provided in chapter (9) suggest that informal financial transactions in our sample can be classified as intermittent. There was no evidence of the existence of professional money lenders. Loans, with very few exceptions, were interest free. Most loans were undertaken without contract or collateral. However default cases were low thanks to societal governance. Moreover the chapter analyses the characteristics of RoSCA in Egypt and its role in financial intermediation. The determinants of formal and informal borrowing are estimated using Tobit analysis. The chapter concludes with a discussion of the implications of financial liberalisation on household credit decisions. This thesis highlights the importance of a liberalised financial system for economic development in Egypt. However it argues that financial liberalisation, on its own, is not a sufficient remedy for the problems encountered in the financial sector. Macroeconomic stability and prudential regulation are considered to be essential prerequisites for liberalisation. In addition the thesis strongly emphasises the need for the restructuring of the financial system and the ensuring of its compatibility with the cultural environment to enable the full realisation of the benefits of financial liberalisation.
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Motamen, S. « International trade, immiserisation and welfare : The case of oil exporting LDCs ». Thesis, University of Essex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356750.

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Afzali, Ahmad Walid. « DOES HUMAN CAPITAL MATTER FOR FDI'S EFFECT ON POVERTY IN LDCs ? » OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/233.

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Very few empirical studies have attempted to study the impact of foreign direct investment and its interaction with human capital on poverty alleviation in developing countries. This paper attempts to fill this gap and contribute to the literature on FDI, human capital and poverty by not only disentangling the effects of FDI on poverty but also examining this effect in the presence of human capital.
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Obuah, Emmanuel Ezi. « Regional economic integration in Africa : the role of transnational corporations in the economic community of West African states ». Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318499.

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Livres sur le sujet "Ldacs"

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Cuddington, John T. Fiscal policy in commodity-exporting LDCs. [Washington, D.C.] : International Bank for Reconstruction and Development, 1988.

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American Express International Banking Corporation., dir. International debt : Banks and the LDCs. London : American Express International Banking Corporation, 1985.

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United Nations. Economic Commission for Africa., dir. African LDCs : Progress and emerging issues. Addis Ababa : Economic Commission for Africa, 2008.

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Zephirin, Mary Gerarda. Imperfect information and financial liberalization in LDCs. [s.l.] : typescript, 1990.

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Navin, Dahal, South Asia Watch on Trade, Economics, and Environment. et Progressive Regional Action and Cooperation on Trade., dir. Positive trade agenda for South Asian LDCs. Kathmandu : South Asia Watch on Trade, Economics & Environment, 2004.

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Wang, Li-jung. Establishing domestic commodity futures markets in LDCs. Taipei, Taiwan, Republic of China : Chung-Hua Institution for Economic Research, 1994.

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United Nations Industrial Development Organization. Regional and Country Studies Branch. et United Nations Conference on the Least Developed Countries. (2nd : 1990 : Paris, France), dir. Industry in the LDCs : Systems of development. [Vienna, Austria] : United Nations Industrial Development Organization, 1990.

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United Nations Industrial Development Organization. Regional and Country Studies Branch., dir. Industry in the LDCs : Systems of development. [S.l.] : United Nations Industrial Development Organization, 1990.

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O, Krueger Anne, et Sequoia Institute, dir. Development with trade : LDCs and the international economy. San Francisco, Calif : ICS Press, 1988.

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Annisette, M. A. The value of financial innovation research to LDCs. Manchester : UMIST, 1993.

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Chapitres de livres sur le sujet "Ldacs"

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Wulf, Volker. « The Effects of the Lomé Conventions on LDACs ». Dans The Least Developed and the Oil-Rich Arab Countries, 64–81. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-12558-6_5.

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Zaisberger, Michael, et Holger Arthaber. « Random Access Performance Evaluation and Improvements of the LDACS ». Dans Lecture Notes in Electrical Engineering, 26–34. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5692-7_4.

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Koppers, Simon. « Some Aspects of the Gulf Co-operation Council’s Relationship with LDACs ». Dans The Least Developed and the Oil-Rich Arab Countries, 31–48. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-12558-6_3.

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Ibrahim, Badr Al-Din. « Some Aspects of Islamic Banking in LDACs : Reflections on the Faisal Islamic Bank, Sudan ». Dans The Least Developed and the Oil-Rich Arab Countries, 216–28. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-12558-6_14.

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Raffer, Kunibert. « The Effects of Changes of Oil Prices on Peripheral Net Importers : A Crude Estimate with Special Reference to LDACs ». Dans The Least Developed and the Oil-Rich Arab Countries, 13–30. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-12558-6_2.

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Bernardo, Cecília Silva, Gebru Jember Endalew, Thinley Namgyel et Binyam Yakob Gebreyes. « Least Developed Countries (LDCs) ». Dans Springer Climate, 61–71. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41021-6_6.

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Kiljunen, Kimmo. « Import Competition from LDCs ». Dans Finland and the New International Division of Labour, 112–33. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-10012-5_4.

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Kiljunen, Kimmo. « Manufactured Exports to LDCs ». Dans Finland and the New International Division of Labour, 134–42. London : Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-10012-5_5.

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Ghatak, Subrata. « Monetary institutions in LDCs ». Dans Monetary Economics in Developing Countries, 63–74. London : Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-23895-8_4.

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Hawthorne, Helen. « LDCs in the GATT ». Dans Least Developed Countries and the WTO, 38–52. London : Palgrave Macmillan UK, 2013. http://dx.doi.org/10.1057/9781137269775_3.

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Actes de conférences sur le sujet "Ldacs"

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« LDACS Spectral Efficiency ». Dans 2019 Integrated Communications, Navigation and Surveillance Conference (ICNS). IEEE, 2019. http://dx.doi.org/10.1109/icnsurv.2019.8735175.

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Felux, Michael, Thomas Graupl, Nils Maurer et Mirko Stanisak. « Transmitting GBAS messages via LDACS ». Dans 2018 IEEE/AIAA 37th Digital Avionics Systems Conference (DASC). IEEE, 2018. http://dx.doi.org/10.1109/dasc.2018.8569836.

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Zampieri, Gianluca, Gary McGraw, Okuary Osechas, Brandon Weaver, Michael Meurer et Sai Kalyanaraman. « LDACS Navigation System Design Considerations ». Dans 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022). Institute of Navigation, 2022. http://dx.doi.org/10.33012/2022.18411.

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Bellido-Manganell, Miguel A. « Impact assessment of LDACS on JTIDS ». Dans 2017 Integrated Communications, Navigation and Surveillance Conference (ICNS). IEEE, 2017. http://dx.doi.org/10.1109/icnsurv.2017.8011963.

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Graupl, Thomas, et Nils Maurer. « Performance-Optimizing Secure GBAS Over LDACS ». Dans 2021 Integrated Communications Navigation and Surveillance Conference (ICNS). IEEE, 2021. http://dx.doi.org/10.1109/icns52807.2021.9441559.

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Maurer, Nils, Thomas Graupl et Corinna Schmitt. « Evaluation of the LDACS Cybersecurity Implementation ». Dans 2019 IEEE/AIAA 38th Digital Avionics Systems Conference (DASC). IEEE, 2019. http://dx.doi.org/10.1109/dasc43569.2019.9081786.

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Osechas, Okuary, Shrivathsan Narayanan, Omar Garcia Crespillo, Gianluca Zampieri, Giuseppe Battista, Rachit Kumar, Nicolas Schneckenburger, Elisabeth Lay, Boubeker Belabbas et Michael Meurer. « Feasibility Demonstration of Terrestrial RNP with LDACS ». Dans 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019). Institute of Navigation, 2019. http://dx.doi.org/10.33012/2019.17119.

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Thiasiriphet, Thanawat, Nicolas Schneckenburger et Michael Schnell. « Ranging with LDACS : Results from measurement campaign ». Dans 2016 Integrated Communications Navigation and Surveillance (ICNS). IEEE, 2016. http://dx.doi.org/10.1109/icnsurv.2016.7486402.

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Maurer, Nils, Thomas Graupl, Christoph Gentsch, Tobias Guggemos, Marcel Tiepelt, Corinna Schmitt et Gabi Dreo Rodosek. « A Secure Cell-Attachment Procedure of LDACS ». Dans 2021 IEEE European Symposium on Security and Privacy Workshops (EuroS&PW). IEEE, 2021. http://dx.doi.org/10.1109/eurospw54576.2021.00019.

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Gurbuz, Ayten, Daniel M. Mielke et Miguel A. Bellido-Manganell. « On the Application of Beamforming in LDACS ». Dans 2022 Integrated Communication, Navigation and Surveillance Conference (ICNS). IEEE, 2022. http://dx.doi.org/10.1109/icns54818.2022.9771514.

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Rapports d'organisations sur le sujet "Ldacs"

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Moon, Suerie. Meaningful Technology Transfer to LDCs. Geneva, Switzerland : International Centre for Trade and Sustainable Development, 2011. http://dx.doi.org/10.7215/ip_pb_20110513.

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Fikremarkos, Merso. IP Trends in African LDCs and the LDC TRIPS TransitionExtension. ICTSD International Centre for Trade and Sustainable Development, 2013. http://dx.doi.org/10.7215/ip_pb_20130611.

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Dey Ancharaz, Vinaye, et Paolo Ghisu. Deepening India’s Engagement with the LDCs : An in-depth Analysis of India’s Duty-free Tariff Preference Scheme. ICTSD, octobre 2014. http://dx.doi.org/10.7215/co_ip_20141029.

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Perera, Duminda, Ousmane Seidou, Jetal Agnihotri, Mohamed Rasmy, Vladimir Smakhtin, Paulin Coulibaly et Hamid Mehmood. Flood Early Warning Systems : A Review Of Benefits, Challenges And Prospects. United Nations University Institute for Water, Environment and Health, août 2019. http://dx.doi.org/10.53328/mjfq3791.

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Résumé :
Floods are major water-related disasters that affect millions of people resulting in thousands of mortalities and billiondollar losses globally every year. Flood Early Warning Systems (FEWS) - one of the floods risk management measures - are currently operational in many countries. The UN Office for Disaster Risk Reduction recognises their importance and strongly advocates for an increase in their availability under the targets of the Sendai Framework for Disaster Risk Reduction, and Sustainable Development Goals (SDGs). However, despite widespread recognition of the importance of FEWS for disaster risk reduction (DRR), there’s a lack of information on their availability and status around the world, their benefits and costs, challenges and trends associated with their development. This report contributes to bridging these gaps by analyzing the responses to a comprehensive online survey with over 80 questions on various components of FEWS (risk knowledge, monitoring and forecasting, warning dissemination and communication, and response capabilities), investments into FEWS, their operational effectiveness, benefits, and challenges. FEWS were classified as technologically “basic”, “intermediate” and “advanced” depending on the existence and sophistication of FEWS` components such as hydrological data = collection systems, data transfer systems, flood forecasting methods, and early warning communication methods. The survey questionnaire was distributed to flood forecasting and warning centers around the globe; the primary focus was developing and least-developed countries (LDCs). The questionnaire is available here: https://inweh.unu.edu/questionnaireevaluation-of-flood-early-warning-systems/ and can be useful in its own right for similar studies at national or regional scales, in its current form or with case-specific modifications. Survey responses were received from 47 developing (including LDCs) and six developed countries. Additional information for some countries was extracted from available literature. Analysis of these data suggests the existence of an equal number of “intermediate” and “advanced” FEWS in surveyed river basins. While developing countries overall appear to progress well in FEWS implementation, LDCs are still lagging behind since most of them have “basic” FEWS. The difference between types of operational systems in developing and developed countries appear to be insignificant; presence of basic, intermediate or advanced FEWS depends on available investments for system developments and continuous financing for their operations, and there is evidence of more financial support — on the order of USD 100 million — to FEWS in developing countries thanks to international aid. However, training the staff and maintaining the FEWS for long-term operations are challenging. About 75% of responses indicate that river basins have inadequate hydrological network coverage and back-up equipment. Almost half of the responders indicated that their models are not advanced and accurate enough to produce reliable forecasts. Lack of technical expertise and limited skilled manpower to perform forecasts was cited by 50% of respondents. The primary reason for establishing FEWS, based on the survey, is to avoid property damage; minimizing causalities and agricultural losses appear to be secondary reasons. The range of the community benefited by FEWS varies, but 55% of FEWS operate in the range between 100,000 to 1 million of population. The number of flood disasters and their causalities has declined since the year 2000, while 50% of currently operating FEWS were established over the same period. This decline may be attributed to the combined DRR efforts, of which FEWS are an integral part. In lower-middle-income and low-income countries, economic losses due to flood disasters may be smaller in absolute terms, but they represent a higher percentage of such countries’ GDP. In high-income countries, higher flood-related losses accounted for a small percentage of their GDP. To improve global knowledge on FEWS status and implementation in the context of Sendai Framework and SDGs, the report’s recommendations include: i) coordinate global investments in FEWS development and standardise investment reporting; ii) establish an international hub to monitor the status of FEWS in collaboration with the national responsible agencies. This will support the sharing of FEWS-related information for accelerated global progress in DRR; iii) develop a comprehensive, index-based ranking system for FEWS according to their effectiveness in flood disaster mitigation. This will provide clear standards and a roadmap for improving FEWS’ effectiveness, and iv) improve coordination between institutions responsible for flood forecasting and those responsible for communicating warnings and community preparedness and awareness.
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A Simulation Analysis of India’s Duty-Free Trade Preference Scheme : A focus on African LDCs. ICTSD, novembre 2014. http://dx.doi.org/10.7215/co_ip_20140411.

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A Simulation Analysis of India’s Duty-Free Trade Preference Scheme : A focus on African LDCs. ICTSD, novembre 2011. http://dx.doi.org/10.7215/co_ip_20141104a.

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