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Showing 50 of 25456 papers
AMPLIFICATION OF HIGH-FREQUENCY CURRENTS BY CRYSTALLINE GERMANIUM TRIODES
Industrial Applications of Radioelements
STUDY OF $\pi$-$\mu$-$e$ DECAY USING SCINTILLATION COUNTERS
Recent Measurements of the Speed of Light and Microwaves in Vacuum
RADIOACTIVE ISOTOPES OF HELIUM
Modern Advances in Electron Theory
TREASURES OF RUSSIAN SCIENCE
Jurassic of the Central Region of Kuzbass
This paper summarizes geological investigations of Jurassic coal-bearing deposits in the Central District of the Kuznetsk Basin, undertaken to clarify their stratigraphy, coal potential, hydrogeological significance, and relation to underlying Paleozoic and Triassic rocks. Using bed-by-bed lithologi…
Materials on the Stratigraphy and Tectonics of the Northwestern Altai
This paper examines the stratigraphy and tectonic structure of Northwestern Altai, focusing on the junction between the Gorny Altai and Rudny Altai structural domains. On the basis of field observations, lithological comparisons, fossil evidence, and relations among sedimentary, volcanic, and intrus…
Upper Cambrian Arbat Formation of the Western Sayan
This paper reassesses the stratigraphic position and age of the Arbat Formation on the northern slope of the Western Sayan, disputing earlier assignments to the Lower or Middle Cambrian. Using detailed descriptions of key field sections, lithological composition, contacts, unconformities, clastic ma…
Spin and magnetic moment of light helium ($^3$)
On the Efficiency of Vacuum Power Installations
This paper examines how to assess the efficiency of vacuum power installations intended to generate electricity from low-temperature heated water, including natural waters and industrial waste heat. It critiques earlier treatments by Rey, Chambadal, and Nisolle for applying Rankine-cycle assumptions…
Losses and Efficiency of a Steam Turbine
This paper proposes a systematic classification of losses and efficiencies in steam turbines, emphasizing the general case of multistage, multiflow machines rather than the simpler single-flow turbine usually treated in textbooks. It distinguishes internal losses associated with changes in the worki…
On the Choice of the Type of Surface Condenser
This paper examines the selection of single-pass versus two-pass surface condensers for steam-turbine installations, focusing on cooling-water demand, heat transfer, and pumping energy. It develops comparative formulas for condenser surface, water flow, heat-transfer coefficient, hydraulic resistanc…
i-t Diagram for Combustion Products
This paper presents a universal enthalpy, temperature diagram for combustion products, intended to determine the enthalpy of gas mixtures from temperature and composition, or conversely to estimate temperature from enthalpy and composition. The construction is based on expressing mixture enthalpy as…
Water gas flame
This paper presents a comprehensive experimental study of water-gas combustion under conditions ranging from laboratory burners to industrial heat installations. It examines gas composition from coal gasification, two-cone flame structure, partially premixed and diffusion flames, catalytic effects o…
Study of a Burning Laminar Diffusion Gas Flame
This paper examines laminar diffusion combustion of gas jets, focusing on flame length, temperature distribution, combustion product composition, and the limits of existing diffusion flame theories. It develops and applies diffusion equation solutions for plane-parallel and concentric gas and air st…
Experience with Acid-Alkaline Washing of Water Economizers
This paper reports operational experience with acid-alkaline chemical cleaning of scaled coil-type water economizers in water-tube boilers at a Ural thermal power station. It describes the cleaning circuit, reagent preparation, circulation procedure, and sequence of hydrochloric-acid treatment follo…
Protective Coatings for Thermocouples
This paper investigates protection of iron, constantan thermocouples intended for long-term measurements near 850°C, where oxidation of the iron electrode normally limits stability. It proposes a simplified pencil-type thermocouple in which the iron sheath serves as one electrode, the constantan wir…
On Objections in Connection with the Problem of Utilizing the Heat of Exhaust Steam from Steam Locomotives
This paper responds to technical and economic objections to a proposed system for utilizing exhaust steam from steam locomotives by heating water in accumulator tanks or enlarged tenders and using it for low-temperature power generation and heat supply at railway depots. The author revises critics’ …
On the Selection of the Heating Zone in Power Plant Condensers at a Specified Vacuum
This paper examines the choice of the circulating water temperature rise, or heating zone, in power plant surface condensers for a specified vacuum. It develops an economic calculation that combines condenser heat transfer, water side resistance, pumping energy, water conduit parameters, fuel cost, …
On the "siderite" of the Bazyr deposits
This paper reexamines brown carbonate veinlets in the southern Bazyr deposits, previously identified as siderite, within dolomitized limestones. Using microscopic observations, chemical analysis, and immersion-method refractive-index measurements, the author compares the material with siderite, anke…
New Data on the Geology of the Sarala Mine Area
This paper reports preliminary geological observations from the Sarala gold mine area, a key Western Siberian reference locality for ancient algal flora and Proterozoic, Cambrian stratigraphic questions. Based on field observations made in 1947, it describes probable local archaeocyathid-bearing lim…
On the Deep Geology of the Depression Between the Kansk Horst and the Southern Yenisei Ridge
This paper examines the deep geological structure and origin of the Kansk tectonic depression between the Kansk Horst and the South Yenisei Ridge. Drawing on field observations, prior investigations, stratigraphic relationships, and evidence from outcrops, drilling, and xenoliths in Devonian effusiv…
On the Question of the Tertiary Weathering Crust in the Southern Urals
This paper examines evidence for a Tertiary weathering crust in the Kempirsai hyperbasite massif of the Southern Urals, focusing on serpentinite weathering profiles and associated variegated deposits. Using lithological observations and the sequence of secondary mineral formation, the author disting…
On the Geomorphology of the Northwestern Margin of the Altai
This paper examines the geomorphology of the northwestern margin of the Altai, where the mountain structure descends beneath the loose deposits of the Kulunda steppe. Based on geological and geomorphological observations from the Kurya, Krasnoshchekovo, and Zmeinogorsk districts, it distinguishes a …
Negative Forms of Diopside Crystals from the Karysh District of Khakassia
This paper investigates well preserved leaching cavities in quartz feldspar veins of the Karysh skarn district in Khakassia, interpreted as negative crystal forms of an originally present mineral. Casts made from the cavities were measured goniometrically, and the residual material was examined by o…
Apophyllite of the Kaltarovskoye Deposit (Khakassia)
This paper reports the identification and description of apophyllite from the Kaltarovskoye skarn deposit in Khakassia, where it occurs as small milky-white dipyramidal crystals in calcite and quartz-calcite veinlets cutting garnet skarns and quartz-pyroxene rocks. The study uses physical and chemic…
Adularia from the Glafirinskoye Deposit (Ulenskaya Group, Khakassia)
This paper describes alkaline feldspars from the Glafirinskoye skarn deposit of the Ulenskaya group in Khakassia and evaluates their identification as adularia. Based on field observations, crystallographic descriptions, goniometric measurements, and specific gravity determinations, the study charac…
Mass crystallization at many levels
This article reports experiments on mass crystallization designed to test whether saturated salt solutions become vertically stratified during cooling, a question raised by earlier work on suspended alum crystals and later disputed. Solutions of several salts saturated at 80 to 100 degrees were cool…
Mineralogy and Genesis of Secondary Zones of a Sulfide Deposit in Altai
This study examines secondary zoning in a sulfide ore body in Southwestern Altai whose upper part is cut by a buried valley and preserves a strongly developed cementation zone. Based on field collections from 1944 and 1945 and mineragraphic study of more than two hundred polished sections, it charac…
On the Geology of the Kempirsai Hyperbasite Massif
This paper presents a geological interpretation of the Kempirsai hyperbasite massif in the Southern Urals, describing its stratigraphy, petrography, intrusive relations, and tectonic structure. On the basis of field relationships, rock textures, banding, fracture systems, and contacts between serpen…
New Data on the Age of Porphyritic Granites in the Southeastern Alatau
This paper addresses the unresolved age of porphyritic biotite, microcline granites in the southeastern Gorny Altai, using observations from 1947 geological mapping in the Chikhachev Range. It summarizes the regional stratigraphy, including Lower Silurian Kurai rocks, Middle Devonian Yustyd deposits…
Ovoid albitites from the Znamenity mine area in the Kuznetsk Alatau
This paper describes ovoid albitites and associated albitized rocks from the Znamenity mine area in the Kuznetsk Alatau, where they occur in and near small bodies of albitic diorite related to zones of deformation and quartz ore veins. On the basis of field relations, petrographic descriptions, opti…
Belsky Intrusive Complex
This paper examines the Belsky intrusive massif on the eastern slope of the Kuznetsk Alatau, describing its geological setting, morphology, petrography, and alteration history. On the basis of field relations and petrographic observations, the massif is interpreted as a small probably Precambrian sy…
Fossil Insects from the Jurassic Deposits of the Central Region of Kuzbass
This note describes fossil insect impressions collected from Jurassic deposits of the central Kuzbass region, chiefly from the Sartakovo member near Chernyi Etap and one specimen from the Barashevo member at Rodnichki. The material comprises three taxa, Pseudocossus zemcuznicovi, Samarura gigantea, …
A Note on the Fauna of the Krasnoyarsk Sandstones of the Kuznetsk Basin
This note describes fossil material collected by V. I. Yavorsky in the Krasnoyarsk sandstones of the Kuznetsk Basin near Smolino on the Tom River, deposits previously regarded as nearly barren apart from rare reptile remains. Khalfin characterizes several poorly preserved specimens from different be…
Lamellibranch mollusks of the Baidaevskoe deposit (Kuzbass)
This study examines fossil lamellibranch mollusks from the Erunakovskaya suite of the Baidaevsky coal deposit in Kuzbass, using large core collections from boreholes covering the Abashevo, Baidaevsky, and Esaulsky horizons. The author identifies 24 forms, including numerous new species and varieties…
Structural Features of Ore Fields in the Znamenitinsky Mining District of Khakassia
This paper analyzes the structural controls on quartz ore veins in the Znamenitinsky mining district of Khakassia, focusing on the Spasskoye and Znamenitinskoye deposits and their relation to competent Proterozoic intrusive bodies. It distinguishes three genetically related types of ore structures, …
On the Development of Pinnate Structures
The paper examines the origin and geological significance of plumose fracture and vein structures, with emphasis on their value for interpreting stress directions, block movements, and ore localization. Using field observations from the Taldy and Talitsa granite plutons in Gorny Altai, especially th…
Some Results of Applying the Method of Geometric Analysis of Disjuncts to the Search for a Displaced Wing of a Seam in the Prokopyevsk District of Kuzbass
This paper addresses the practical problem of locating the displaced wing of coal seams interrupted by faults in the highly dislocated Prokopyevsk area of Kuzbass. It argues that geometric analysis should be combined with geological information, especially slickenside striation and the regional pred…
Materials for the Correlation of the Jurassic Deposits of Siberia
This paper proposes an initial stratigraphic correlation scheme for Jurassic deposits across several Siberian coal-bearing basins, including the Kuznetsk, Chulym-Yenisei, Kansk, and Irkutsk basins. Using published and field-based data on lithology, coal composition, unconformities, thicknesses, and …