Igor Petrov – författare

In April 1945, in one of the final battles of the Second World War, on the Oder river east of Berlin, Russian troops, clad in German uniforms, fought against the advancing Red Army. Why would Russians fight against their compatriots, and how did the Soviet collaboration come about?In this insightful and meticulously researched study Oleg Beyda and Igor Petrov answer these questions and explore, in vivid detail, the wider issue of the collaboration of Soviet citizens with the Axis powers. Their work throws a fascinating new light onto this long-suppressed aspect of the Great Patriotic War, a crucial topic that remains deeply controversial in contemporary Russia.The most famous figure in this complicated history is Andrei Vlasov, the captured Red Army general who defected to the Germans and became the commander of the Russian Liberation Army. His wartime career, and the careers of the other Soviet prisoners of war and Russian migr s who joined him, are the central characters in the story. The motivations of these men varied: while some had switched loyalties out of conviction, for many POWs the choice was between collaboration or slow death in a German prison camp.As the book reveals, for the most of its history, the Russian Liberation Army remained a German propaganda project, a hodgepodge of scattered yet effective military units from former POWs under strict German command. Nevertheless, Vlasov and his officers sometimes sought to conduct their own policy independent of their German masters. Right at the end of the war, in Prague, in a desperate attempt to do right' by the Allies, Vlasov's units fought against German troops, yet again changing sides.The challenges these men faced, and the choices they had to make between loyalty, anti-Bolshevism and survival, make this book a fascinating reading.

Using the direct seismic responses of fractures and fracture zones in productive formations to obtain information about their locations and characteristics is an essentially new and promising direction of investigation. Given the growing production of hydrocarbons from unconventional reservoirs, the basic understanding of seismic wave responses of natural and hydraulic fractures is urgently needed, and the ability to model those waves is a necessary first step toward detection and more accurate characterization of fractured reservoirs and through this process toward improved oil production. This book addresses the properties of seismic waves of fractured media by describing, modeling, and analyzing the various seismic wave responses from discrete fractured media, and it proposes a methodology for the direct detection of fractured reservoirs based on these analyses. Use of the grid-characteristic method to numerically model the waves allows for the inclusion of fundamental properties of real fractured reservoirs and fractured features in the analysis. Importantly, this method facilitates a highly accurate computation of wave propagation that accounts for the multiple discreteness of the medium. Of use to oil company geophysicists and geologists directly involved in interpretation of seismic data acquired from prospects of fractured reservoir development, this book also will be of interest to scientific workers in universities (particularly postgraduate students) and R&D departments of geophysical and oil companies.