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Articles 18301 - 18330 of 19215
Full-Text Articles in Entire DC Network
The Reflection Coefficient At The Truncated Corner Of A Rectangular Wave Guide, John Raymond Barcroft
The Reflection Coefficient At The Truncated Corner Of A Rectangular Wave Guide, John Raymond Barcroft
Masters Theses
"The term wave guide refers to a hollow conducting tube (usually of rectangular or circular cross section) filled with a dielectric (or vacuum) and used for the transmission of electromagnetic waves. We shall consider the guide to be bounded by a perfect conductor and to be filled with a lossless homogeneous isotropic dielectric (or vacuum). The electromagnetic wave in the guide must of course satisfy Maxwell's equation. It must also satisfy the boundary condition that there be no tangential component of electric field at the surface of the conductor. If the electromagnetic waves traveling along the guide meet a discontinuity …
The Development Of Plans For A National Airport For Ankara, Turkey, Mehmet Ragip Samli
The Development Of Plans For A National Airport For Ankara, Turkey, Mehmet Ragip Samli
Masters Theses
"'The present rapid development of general interest in aviation has brought to the front a new field of engineering. Development of the airplane has already reached a stage where the limit of its usefulness seems fixed only by the places which may be provided for taking off and landing. Due to the newness of the problem, not every one on whom responsibility rests recognizes the fact that the selection of the proper site and location for an airport is just as much an engineering problem as are its design and construction.'
The Turkish government began construction or the Ankara-Esenboga airport …
The Missouri Miner, December 02, 1949
The Missouri Miner, December 02, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, November 18, 1949
The Missouri Miner, November 18, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, November 11, 1949
The Missouri Miner, November 11, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, October 21, 1949
The Missouri Miner, October 21, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, October 07, 1949
The Missouri Miner, October 07, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 23, 1949
The Missouri Miner, September 23, 1949
The Missouri Miner Newspaper
No abstract provided.
Missouri S&T Magazine, September-October 1949, Miner Alumni Association
Missouri S&T Magazine, September-October 1949, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
The Missouri Miner, July 22, 1949
Missouri S&T Magazine, July-August 1949, Miner Alumni Association
Missouri S&T Magazine, July-August 1949, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
The Missouri Miner, July 01, 1949
The Missouri Miner, June 20, 1949
The Missouri Miner, May 20, 1949
The Missouri Miner, May 13, 1949
The Missouri Miner, April 15, 1949
The Missouri Miner, April 08, 1949
The Missouri Miner, April 01, 1949
The Missouri Miner, March 04, 1949
A Report On The Reduction Of Sphalerite Under Reduced Pressure, John H. Fuqua, William H. Magruder
A Report On The Reduction Of Sphalerite Under Reduced Pressure, John H. Fuqua, William H. Magruder
Missouri School of Mines and Metallurgy Reports
During the last war, with the increased demand for magnesium metal and the general disregard for costs, a number of plants were constructed for the production of magnesium by vacuum metallurgical methods. (Both the Carbothermic Process and the Pidgeon Ferrosilicon Process employ vacuum systems for the production of metallic Mg.)
At the close of the war several of the government built plants were forced to suspend operations because of the economic impossibility of producing magnesium in competition with the Dow Chemical Company. It was with the availability of these plants in mind that experimentation with the possibilities of producing metallic …
The Missouri Miner, January 17, 1949
The Missouri Miner, January 17, 1949
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, January 07, 1949
The Missouri Miner, January 07, 1949
The Missouri Miner Newspaper
No abstract provided.
A Study Of The Gelation Of Air-Setting Refractory Mortars, James Irving Mueller
A Study Of The Gelation Of Air-Setting Refractory Mortars, James Irving Mueller
Doctoral Dissertations
"Three basic mortar formulae were used in this investigation, each mix having some different materials present and each having its own gelling characteristics. The study was directed along the theory that the dry materials used play an important part in the hardening. Certain admixtures were tested and several were found to improve the workability after storage. The presence of additional sodium ions in the mortar was found to be helpful in overcoming the gelation but these tended to lower the refractoriness of the mortar.
A study was made of the base exchange capacities of the dry materials and the material …
Treatment Of Zinc Crusts By Vacuum Distillation, Chang-Hsu Shih
Treatment Of Zinc Crusts By Vacuum Distillation, Chang-Hsu Shih
Masters Theses
"The purpose of this research is to investigate the possibility of obtaining reasonably pure silver from the zinc crusts by vacuum distillation in one step. The effect of temperature, pressure, particle size, and time of distillation will be determined. The behavior of other constituents in the crusts are also to be studied"--Introduction, page 5.
A Determination Of The Surface Tension Of Tin In The Solid State, Charles Merton Rice
A Determination Of The Surface Tension Of Tin In The Solid State, Charles Merton Rice
Masters Theses
"Many studies have been made on the surface tension of metals but almost exclusively in the liquid state. Information on metals in the solid state is needed in pure physics to test theories of cohesion and in physical metallurgy to explain sintering. The common approach to the problem of surface tension in the solid state is to hang a weight on a thin wire or leaf of metal and then heat this weighted sample to a temperature at which flow is appreciable. The shrinkage or stretch of the sample is then a measure of the surface tension. Of the recent …
Comparative Study Of The Collecting Property Of Naphthenic Acids With Oleic Acid As Applied To Calcite, Hematite, Barite, And Fluorspar, Siddhi Nath Mukherji
Comparative Study Of The Collecting Property Of Naphthenic Acids With Oleic Acid As Applied To Calcite, Hematite, Barite, And Fluorspar, Siddhi Nath Mukherji
Masters Theses
"The present investigation was undertaken to find out any comparable collecting property of some of the industrial naphthenic acids available in the market with that of commercial grade of oleic acid so that some information may be available in selecting naphthenic acids as flotation collectors. In the flotation industry, usefulness of oleic acid as non-metallic minerals collector is well established. On the other hand, the use of naphthenic acids as flotation collector has been reported only in few cases. Even in those cases, no attempt has been made to correlate their collecting properties with that of their physical and chemical …
Geology And Mineralization Of The Minerva Mine No. 1, Hardin County, Illinois, Matthew Peter Nackowski
Geology And Mineralization Of The Minerva Mine No. 1, Hardin County, Illinois, Matthew Peter Nackowski
Masters Theses
"This study originally was undertaken to describe the witherite identified in specimens collected at the Minerva Oil Company Mine No. 1, Hardin County, Illinois. The original specimens of witherite were collected on October 25, 1948, by Charles E. Tothill, while on a senior trip through the fluorspar mine. The witherite was identified by Dr. O. R. Grawe, Chairman of the Geology Department, Missouri School of Mines, Rolla, Missouri, to whom the specimens were presented. Dr. Grawe suggested that the writer visit the southern Illinois fluorspar area to determine the occurrence and distribution of the witherite. This mineral had been described …
The Investigation Of Color Modification As A Result Of Solid Solution, Bobby Lee Mornin
The Investigation Of Color Modification As A Result Of Solid Solution, Bobby Lee Mornin
Masters Theses
"To the ceramic industry, color has long been one of its chief problems, not only in reproducing colors in the many complex silicate structures but in the development of stains that are stable at high temperatures and that are economically feasible for mass production. At the present time a stable high temperature red or yellow would be very desirable. Solid solution has been employed in ceramics to modify and thereby provide ceramic materials of different physical characteristics. The limited data available with respect to such solid solution serves to indicate that perhaps this state may serve as an important means …
Preparation Of Copper Single Crystals By Means Of Powder Metallurgy Methods, Wei-Kung Chang
Preparation Of Copper Single Crystals By Means Of Powder Metallurgy Methods, Wei-Kung Chang
Masters Theses
"Since different mechanical properties of metals result from different grain size became known, the metallurgists have been interested in finding out the true nature of the grain boundaries. Consequently, several different theories concerning the mechanism of recrystallization, grain growth, and the structure of metals were advanced and studied. These threw much light on the difference of properties between polycrystalline metals and single crystals of the same metals. The single crystals of metals were studied because they enabled the investigator to determine the important points of metallic behavior. The first work on single crystals was rather obscure and limited to isolated, …
Wetting Properties Of Enamel Glasses And Relation To Adherence, Chandrakant Chhotalal Shah
Wetting Properties Of Enamel Glasses And Relation To Adherence, Chandrakant Chhotalal Shah
Masters Theses
"Various investigators have tried to find the cause of adherence of enamel glasses to iron metal and they have put forward different theories to explain this phenomena of adherence. In spite of much work done on adherence, no theory has generally been accepted to explain the function of adhering oxides like cobalt, nickel or manganese, etc., in sheet iron ground coats. In this investigation it was thought to find out whether adherence promoting oxides have any effect on the wetting abilities of enamel glasses at elevated temperatures or not, and further, whether this different wettability caused by the different adherence …