Video Experimental Relacionado
Updated: Jul 12, 2026
08:16
Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine
Published on: March 13, 2017
En el frío: perspectivas para la conversión de la base industrial de defensa
Science (New York, N.Y.)
|April 28, 1995
Resumen
Las operaciones de fabricación de bienes militares y comerciales están más integradas de lo que se pensaba. Los contratistas de defensa aprovechan las tecnologías avanzadas, dándoles una ventaja competitiva sobre los productores comerciales.
Área de la Ciencia:
- Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales Organizaciones industriales
- Economía de la Defensa Economía de la Defensa
- Tecnología de fabricación Tecnología de fabricación.
Sus antecedentes:
- El final de la Guerra Fría estimuló una creencia en la divergencia de la fabricación militar y comercial.
- Existía una comprensión limitada con respecto a la superposición técnica y competitiva entre las esferas industriales de defensa y comerciales.
Objetivo del estudio:
- Para analizar el grado de integración entre las operaciones de fabricación de defensa y comerciales.
- Para comparar las condiciones técnicas y competitivas a las que se enfrentan los productores comerciales y de defensa.
- Identificar los factores que contribuyen a una ventaja competitiva en la contratación de defensa.
Principales métodos:
- Análisis de los datos de la encuesta de 1991 de una gran muestra de establecimientos.
- Centrarse en el sector de los bienes duraderos de mecanizado intensivo.
- Análisis comparativo de los productores comerciales y de defensa.
Principales resultados:
- Pocas barreras técnicas y competitivas separan las esferas industriales de defensa y comerciales.
- La integración de la producción comercial-militar es común entre los contratistas de defensa en este sector.
- Los productores comerciales y de defensa se enfrentan a condiciones competitivas similares y a una diversidad de clientes.
- Los contratistas de defensa utilizan más tecnologías que mejoran la productividad.
Conclusiones:
- La separación entre la defensa y la fabricación comercial es menos pronunciada de lo que se suponía.
- La integración de la producción comercial-militar es una estrategia predominante.
- La adopción tecnológica proporciona una ventaja clave para los contratistas de defensa.
Videos de Conceptos Relacionados
02:36Nuclear Power
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
01:27Transformers in Distribution System
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
01:21Masonry in Cold and Hot Weather Conditions
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units and sand dry and...
Other key practices include keeping masonry units and sand dry and...
01:27Cold Weather Concreting
When freshly poured concrete is exposed to freezing temperatures before it has set, the water within the concrete can freeze. This expansion disrupts the setting process, delays chemical reactions necessary for hardening, and increases the volume of pores within the hardened concrete, which weakens its overall structure. If the concrete manages to reach an appreciable strength before it freezes, the damage can be somewhat mitigated.
To counteract the negative impacts of cold weather, ensuring...
To counteract the negative impacts of cold weather, ensuring...
01:29Frost Resistant Concrete
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of entrained...
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of entrained...
01:26Steel Manufacturing
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...