353 SIFOROV 



Presidium. Sidorenko has been a member of the Communist 

 Party of the Soviet Union from 1942. In 1953 he was elected a 

 Corresponding Member of the U.S.S.R. Academy of Sciences. 



Sidorenko has studied the geomorphology and geology of the 

 structure of deserts, processes of mineral formation in con- 

 ditions of desert climate, and phenomena of hypergenesis. He 

 also investigated phosphorous minerals and mineralogy of 

 veined deposits of the Turkman S.S.R. 

 Bibliography: 



Main characteristics of mineral formation in deserts. 



Questions of Mineralogy of Sedimentary Formations. Book 



3-4. L'vov: 1956. 



Eolian differentiation of substance in deserts. Izvest. Akad. 



Nauk S.S.S.R., Ser. Geogr., 1956, #3. 



Experiment in separating continental rock masses of Kara- 



Kumy on the composition of gravel pebbled particles. 



Questions of the Geology of Asia, _2, Moscow: 1955. 

 Office: Presidium of the S. M. Kirov Kol'skii Branch of 



USSR Academy of Sciences 

 Kirovsk, Murmansk Oblast', USSR 



SIFOROV, VLADIMIR IVANQVICH (Radio Engineer) 



V. I. Siforov was born May 31, 1904. He graduated in 1929 

 from the Leningrad Electro- Technical Institute and taught there 

 in 1930-1941 and in 1946-1953; in 1938 he was made professor. 

 From 1928-1941 he worked in the Central Radio Laboratory in 

 Leningrad. He taught in 1941-1952 at the Leningrad Military 

 Air Engineering Academy. In 1953 Siforov began working at 

 the Scientific Research Institute of Communication and in 1955 

 at the Institute of Radiotechnics and Electronics of the U.S.S.R. 

 Academy of Sciences. He has been a member of the Communist 

 Party of the Soviet Union since 1941. In 1953 he was elected a 

 Corresponding Member of the U.S.S.R. Academy of Sciences. 



Siforov has worked on the theory, calculation, and design of 

 radio receiving devices and amplifiers. He is the author of a 

 widely known text '^ Receiving Devices" (1939, 5th edition, 1954). 

 Bibliography: 



Resonant Amplifiers. Theory and Calculation. Leningrad: 

 1932. 



Bandpass Amplifiers. Theory and Calculation. Leningrad- 

 Moscow: 1936. 



High- Frequency Amplifiers (Theory and Calculation). 

 Moscow-Leningrad: 1939. 



