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  • 1
    Electronic Resource
    Electronic Resource
    Micro-Political Strategies and Their Implications for Participative Decision Making (2000)
    Springer
    International journal of value-based management 13 (2000), S. 79-88 
    Details
    ISSN: 1572-8528
    Keywords: participation ; decision making ; knowledge base ; micro-politics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Drawing on both organizational behaviour and employee relations perspectives,the paper defines participation as `opportunity to influence decisions,' andconsiders the impact of the micro-political behaviour of organization membersin pursuit of their interests on the development of genuine participation.Three types of micro-political strategy are identified and their implicationsdiscussed: information control, flexibility, and stage-craft. The discussionis illustrated with findings from an international study of decision making,and brief comment is made on international cultural differences as acomplicating factor. It is suggested that the role of participation in enhancing the knowledge baseof the organization has been neglected. If genuine participation is to beinstituted, decision making will become more complex, requiring negotiation,not only of competing interests but also of what is to be accepted as`knowledge' in the organization. This in turn will place greater demands onthe intellectual skills and personal behaviour of participants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007796318687
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Monitoring space shuttle air quality using the Jet Propulsion Laboratory electronic nose (2004)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A miniature electronic nose (ENose) has been designed and built at the Jet Propulsion Laboratory (JPL), Pasadena, CA, and was designed to detect, identify, and quantify ten common contaminants and relative humidity changes. The sensing array includes 32 sensing films made from polymer carbon-black composites. Event identification and quantification were done using the Levenberg-Marquart nonlinear least squares method. After successful ground training, this ENose was used in a demonstration experiment aboard STS-95 (October-November, 1998), in which the ENose was operated continuously for six days and recorded the sensors' response to the air in the mid-deck. Air samples were collected daily and analyzed independently after the flight. Changes in shuttle-cabin humidity were detected and quantified by the JPL ENose; neither the ENose nor the air samples detected any of the contaminants on the target list. The device is microgravity insensitive.
    Keywords: Man/System Technology and Life Support
    Type: IEEE Sens J (ISSN 1530-437X); Volume 4; 3; 337-47
    Format: text
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  • 3
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    Detection of hydrazine (H) and (MMH) using cyranose E-nose (2001)
    In:  Other Sources
    Details
    Publication Date: 2018-06-11
    Description: The Cyranose electronic nose (e-nose) has been used for the first time to detect hydrazine (H) and monomethyl hydrazine (MMH). The concentrations of hydrazine chosen in this study were 52 ppm (parts per million), 18 ppm, and 1.1 ppm and the concentrations of MMH was 14 ppm and 1 ppm. The Cyranose E-nose has detected hydrazine of 52 ppm and 18 ppm with a good response. The response of the E-Nose for 1.1 ppm hydrazine was insignificant. The response of E-Nose for 14 ppm MMH was significant and 1 ppm MMH was reasonably identifiable. The Cyranose E-Nose may be used to detect hydrazine and MMH with concentrations of at least 18 ppm and 1 ppm, respectively.
    Format: text
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  • 4
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    Annealing Would Improve beta" - Alumina Solid Electrolyte (2003)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A pre-operational annealing process is under investigation as a potential means of preventing a sudden reduction of ionic conductivity in a Beta"-alumina solid electrolyte (BASE) during use. On the basis of tests, the sudden reduction of ionic conductivity, followed by a slow recovery, has been found to occur during testing of the solid electrolyte and electrode components of an alkali metal thermal-to-electric converter (AMTEC) cell. At this time, high-temperature tests of limited duration have indicated the superiority of the treated BASE, but reproducible tests over thousands of hours are necessary to confirm that microcracking has been eliminated. The ionic conductivity of the treated BASE is also measured to be higher than untreated BASE at 1,073 K in low-pressure sodium vapor. Microcracking resulting in loss of conductivity was not observed with treated BASE in one high-temperature experiment, but this result must be duplicated over very long testing times to be sure of the effect. Shorter annealing times (10 to 20 hours) were found to result in significantly less loss of mass; it may be necessary for the packed powder mixture to evolve some Na2O before the Na2O can leave the ceramic.
    Keywords: Man/System Technology and Life Support
    Type: NPO-20919 , NASA Tech Briefs, March 2003; 25-26
    Format: application/pdf
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  • 5
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    Mixed Conducting Electrodes for Better AMTEC Cells (2003)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Electrode materials that exhibit mixed conductivity (that is, both electronic and ionic conductivity) have been investigated in a continuing effort to improve the performance of the alkali metal thermal-to-electric converter (AMTEC). These electrode materials are intended primarily for use on the cathode side of the sodium-ion-conducting solid electrolyte of a sodium-based AMTEC cell. They may also prove useful in sodium-sulfur batteries, which are under study for use in electric vehicles. An understanding of the roles played by the two types of conduction in the cathode of a sodium-based AMTEC cell is prerequisite to understanding the advantages afforded by these materials. In a sodium-based AMTEC cell, the anode face of an anode/solid-electrolyte/cathode sandwich is exposed to Na vapor at a suitable pressure. Upon making contact with the solid electrolyte on the anode side, Na atoms oxidize to form Na+ ions and electrons. Na+ ions then travel through the electrolyte to the cathode. Na+ ions leave the electrolyte at the cathode/electrolyte interface and are reduced by electrons that have been conducted through an external electrical load from the anode to the cathode. Once the Na+ ions have been reduced to Na atoms, they travel through the cathode to vaporize into a volume where the Na vapor pressure is much lower than it is on the anode side. Thus, the cathode design is subject to competing requirements to be thin enough to allow transport of sodium to the low-pressure side, yet thick enough to afford adequate electronic conductivity. The concept underlying the development of the present mixed conducting electrode materials is the following: The constraint on the thickness of the cathode can be eased by incorporating Na+ -ionconducting material to facilitate transport of sodium through the cathode in ionic form. At the same time, by virtue of the electronically conducting material mixed with the ionically conducting material, reduction of Na+ ions to Na atoms can take place throughout the thickness of the cathode. The net effect is to reduce the diffusion and flow resistance to sodium through the electrode while reducing the electronic resistance by providing shorter conduction paths for electrons. Reduced resistance to both sodium transport and electronic conductivity results in an increase in electric power output.
    Keywords: Man/System Technology and Life Support
    Type: NPO-20920 , NASA Tech Briefs, February 2003; 21-22
    Format: application/pdf
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  • 6
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    Microfabricated thermoelectric power-generation devices (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: A device for generating power to run an electronic component. The device includes a heat-conducting substrate (composed, e.g., of diamond or another high thermal conductivity material) disposed in thermal contact with a high temperature region. During operation, heat flows from the high temperature region into the heat-conducting substrate, from which the heat flows into the electrical power generator. A thermoelectric material (e.g., a BiTe alloy-based film or other thermoelectric material) is placed in thermal contact with the heat-conducting substrate. A low temperature region is located on the side of the thermoelectric material opposite that of the high temperature region. The thermal gradient generates electrical power and drives an electrical component.
    Keywords: Energy Production and Conversion
    Format: application/pdf
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  • 7
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    Compensating for Effects of Humidity on Electronic Noses (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A method of compensating for the effects of humidity on the readouts of electronic noses has been devised and tested. The method is especially appropriate for use in environments in which humidity is not or cannot be controlled for example, in the vicinity of a chemical spill, which can be accompanied by large local changes in humidity. Heretofore, it has been common practice to treat water vapor as merely another analyte, the concentration of which is determined, along with that of the other analytes, in a computational process based on deconvolution. This practice works well, but leaves room for improvement: changes in humidity can give rise to large changes in electronic-nose responses. If corrections for humidity are not made, the large humidity-induced responses may swamp smaller responses associated with low concentrations of analytes. The present method offers an improvement. The underlying concept is simple: One augments an electronic nose with a separate humidity and a separate temperature sensor. The outputs of the humidity and temperature sensors are used to generate values that are subtracted from the readings of the other sensors in an electronic nose to correct for the temperature-dependent contributions of humidity to those readings. Hence, in principle, what remains after corrections are the contributions of the analytes only. Laboratory experiments on a first-generation electronic nose have shown that this method is effective and improves the success rate of identification of analyte/ water mixtures. Work on a second-generation device was in progress at the time of reporting the information for this article.
    Keywords: Man/System Technology and Life Support
    Type: NPO-30615 , NASA Tech Briefs, June 2004; 27
    Format: application/pdf
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  • 8
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    Integrated Solar-Energy-Harvesting and -Storage Device (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A modular, integrated, completely solid-state system designed to harvest and store solar energy is under development. Called the power tile, the hybrid device consists of a photovoltaic cell, a battery, a thermoelectric device, and a charge-control circuit that are heterogeneously integrated to maximize specific energy capacity and efficiency. Power tiles could be used in a variety of space and terrestrial environments and would be designed to function with maximum efficiency in the presence of anticipated temperatures, temperature gradients, and cycles of sunlight and shadow. Because they are modular in nature, one could use a single power tile or could construct an array of as many tiles as needed. If multiple tiles are used in an array, the distributed and redundant nature of the charge control and distribution hardware provides an extremely fault-tolerant system. The figure presents a schematic view of the device.
    Keywords: Man/System Technology and Life Support
    Type: NPO-30433 , NASA Tech Briefs, January 2004; 11-12
    Format: application/pdf
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  • 9
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    Microfabricated thermoelectric power-generation devices (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A device for generating power to run an electronic component. The device includes a heat-conducting substrate (composed, e.g., of diamond or another high thermal conductivity material) disposed in thermal contact with a high temperature region. During operation, heat flows from the high temperature region into the heat-conducting substrate, from which the heat flows into the electrical power generator. A thermoelectric material (e.g., a BiTe alloy-based film or other thermoelectric material) is placed in thermal contact with the heat-conducting substrate. A low temperature region is located on the side of the thermoelectric material opposite that of the high temperature region. The thermal gradient generates electrical power and drives an electrical component.
    Keywords: Energy Production and Conversion
    Format: application/pdf
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