Showing papers by "Military Academy published in 1987"
TL;DR: In this article, the virtual work theorem is used to derive the equation of motion for antisymmetric cross-ply laminates in a general state of non-uniform initial stress, where the effects of transverse shear and rotary inertia are included, and the equations are adjusted to a generic expression by using proper transformations.
27 citations
TL;DR: In this article, the virtual work theorem is employed to derive the governing equations of specially orthotropic plates in a general state of non-uniform initial stress, where the effects of transverse shear are included.
14 citations
TL;DR: The Jeoneui Au-Ag mine in South Korea was reported to have a boiling pressure of <150 bars, corresponding to depths of 700 and 1,800m assuming lithostatic and hydrostatic loads.
Abstract: Electrum-galena-sphalerite mineralization of the Jeoneui Au-Ag mine was deposited in three stages of quartz and calcite veins at temperatures between 350•Kand 180•Ž from moderate salinity fluids (4 to 14 wt%NaCI eq). Evidence of boiling indicates pressures of <150 bars, corresponding to depths of 700 and 1,800m assuming lithostatic and hydrostatic loads. Au-Ag deposition was likely a result of boiling, coupled with declining temperatures. Sulfur isotope compositions of sulfides indicate an igneous source with a ƒÂ34S value near 4•ñ. Measured and calculated hydrogen and oxygen isotope values of ore-forming fluids suggest significant meteoric water involvement. Comparison of the Jeoneui Au-Ag deposits to similar shallow Cretaceous Au-Ag deposits and a deeper Jurassic Au system reveals an inverse relationship between depth and water-to-rock ratios in Korean Au-Ag vein deposits. This indicates significant differences in the postmagmatic evolutions of these granite-related gold-bearing hydrothermal systems and may be indicative of the manner in which Au and Ag are scavenged from cooling
12 citations
TL;DR: The U.S. experience in raising the armed forces has resulted in persistent political and social tensions as mentioned in this paper, and the resulting balance has provided armed forces sufficient to preserve the nation while largely guaranteeing individual freedoms.
Abstract: U.S. experience in raising the armed forces has resulted in persistent political and social tensions. Individual freedom has seldom been held subordinate to national security interests. Executive control and legislative oversight have frequently been in conflict, but with little judicial challenge to either branch. Finally, national controls have assured a continuing influence upon state manning and operation of the militia. Despite inherently conflicting objectives, the resulting balance has provided armed forces sufficient to preserve the nation while largely guaranteeing individual freedoms.
2 citations
TL;DR: In this paper, the authors argue that incomplete centralization and service dominance detract from the nation's ability to carry out the critical functions of strategic planning and advice, resource allocation, force structuring, and joint operations.
Abstract: How does the US constitutional system affect this country's ability to organize its armed forces? The primary impact of the system on the issues associated with organizing the armed services seems to be the inability of the United States to create a security apparatus with a truly national perspective The result of this fragmented national security system has been an organizational and decision-making process that reflects the incomplete centralization of authority over the military Incomplete centralization, in turn, allows the perspectives of the individual services to dominate the institutional environment and control-to a considerable degree-the functions and structure of the armed forces More important, incomplete centralization and service dominance detract from the nation's ability to carry out the critical functions of strategic planning and advice, resource allocation, force structuring, and joint operations
1 citations
TL;DR: In this article, the position of the maximum in fluctuation voltage in the region of the α-relaxation process shifts to higher temperatures in annealed but to lower temperatures in quenched samples of poly(methyl methacrylate).
Abstract: Thermal treatment of polymers changes the intensity of electrical fluctuations. The position of the maximum in fluctuation voltage in the region of the α-relaxation process shifts to higher temperatures in annealed but to lower temperatures in quenched samples of poly(methyl methacrylate). Annealing of PMMA not only shifts the β-relaxation to higher temperatures, but also changes the character of the process, and these phenomena are clearly reflected in the intensity of electrical fluctuations.
TL;DR: In this paper, the relationship between thermal expansion and electrical fluctuations in polymers is discussed and the variation of fluctuation voltage in the region of transition to the liquid state and at the onset of the process of chemical relaxation correlates well with specific features of the dilatometric curve.
Abstract: The relationship between thermal expansion and electrical fluctuations in polymers is discussed. The variation of fluctuation voltage in the region of transition to the liquid state and at the onset of the process of chemical relaxation correlates well with specific features of the dilatometric curve. Values of physical characteristics obtained by means of the proposed method for poly(vinyl chloride) and a nitrile rubber vulcanisate are in good agreement with results of traditional methods.