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Dl4All - Download free For All: software and educational resource.Free software and educational resource. With a little searching, you can download what you need for free without spending any money. Our site - "Dl4All" offers free software downloads including antivirus software, office suites, graphic design software, portable , video editing software, multimedia tools, system utilities, and many other popular applications. Here you can find software reviews and ratings so you can understand which apps are worth downloading. If you're looking for free educational programs or materials in the US and Canada, we'll help you find what you need for students and learners. ![]() Free Download Alexander Gogun, "Stalin's Commandos: Ukrainian Partisan Forces on the Eastern Front" English | ISBN: 1350241695 | 2021 | 240 pages | EPUB | 8 MB At the height of World War II, a large number of Soviet partisans fought on the Eastern Front against the Axis occupation. In this book, Alexander Gogun looks at the forces operating in Ukraine. The Nazi atrocities were often matched by partisan brutality. The author examines the indiscriminate use of scorched-earth tactics by the partisans, the destruction of their own villages, partisan-generated Nazi reprisals against civilians, and the daily incidents of robbery, drunkenness, rape and bloody internal conflicts that were reported to be widespread amongst the red partisans. Gogun also analyses allegations of the use of bacteriological weapons and even instances of cannibalism. He shows that all these practices were not a product of the culture of warfare nor a spontaneous 'people's response' to the unremitting brutality of Nazi rule but a specific feature of Stalin's total war strategy. ![]() Free Download Elena Marushiakova, "Stalin Vs Gypsies: Roma and Political Repressions in the USSR" English | ISBN: 350679096X | 2024 | 600 pages | PDF | 7 MB In their centuries-old history, the Roma (formerly known as Gypsies) experienced many difficult moments and cruel trials from their arrival in Europe until now. The history of the Roma in the USSR is no exception in this respect. Along with affirmative state policy towards them (at least until the end of the 1930s), they also fell victim to the massive political repressions of that time. In this book, the Roma victims of these repressions are made visible and the scale of the repressions against them is discussed. The authors describe the political repression of Roma not as an isolated historical phenomenon explicitly aimed at the Roma as a separate ethnic community but understand the events as a component of the mass terror and brutal against all Soviet citizens. In this way, the history of the Roma is inscribed in the general history of the USSR. ![]() Free Download Stability Analysis and Design for Nonlinear Singular Systems By Chunyu Yang, Qingling Zhang, Linna Zhou (auth.) 2013 | 212 Pages | ISBN: 3642321437 | PDF | 2 MB Singular systems which are also referred to as descriptor systems, semi-state systems, differential- algebraic systems or generalized state-space systems have attracted much attention because of their extensive applications in the Leontief dynamic model, electrical and mechanical models, etc. This monograph presented up-to-date research developments and references on stability analysis and design of nonlinear singular systems. It investigated the problems of practical stability, strongly absolute stability, input-state stability and observer design for nonlinear singular systems and the problems of absolute stability and multi-objective control for nonlinear singularly perturbed systems by using Lyapunov stability theory, comparison principle, S-procedure and linear matrix inequality (LMI), etc. Practical stability, being quite different from stability in the sense of Lyapunov, is a significant performance specification from an engineering point of view. The basic concepts and results on practical stability for standard state-space systems were generalized to singular systems. For Lur'e type descriptor systems (LDS) which were the feedback interconnection of a descriptor system with a static nonlinearity, strongly absolute stability was defined and Circle criterion and Popov criterion were derived. The notion of input-state stability (ISS) for nonlinear singular systems was defined based on the concept of ISS for standard state-space systems and the characteristics of singular systems. LMI-based sufficient conditions for ISS of Lur'e singular systems were proposed. Furthermore, observer design for nonlinear singular systems was studied and some observer design methods were proposed by the obtained stability results and convex optimization algorithms. Finally, absolute stability and multi-objective control of nonlinear singularly perturbed systems were considered. By Lyapunov functions, absolute stability criteria of Lur'e singularly perturbed systems were proposed and multi-objective control of T-S fuzzy singularly perturbed systems was achieved. 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