Science and Technology Peer Review: Advanced Technology Development Program Review

2003 ◽  
Author(s):  
Ronald N. Kostoff ◽  
Robert Miller ◽  
Rene Tshiteya
Keyword(s):  
Peer Review ◽  
Technology Development ◽  
Science And Technology ◽  
Development Program ◽  
Advanced Technology ◽  
Program Review

Advanced technology development program review – a US Department of the Navy case study

2001 ◽  
Vol 31 (3) ◽  
pp. 287-298 ◽  
Author(s):  
Ronald K. Kostoff ◽  
Robert Miller ◽  
Rene Tshiteya
Keyword(s):  
Technology Development ◽  
Development Program ◽  
Advanced Technology ◽  
Program Review ◽  
Department Of The Navy

scholarly journals Implementation of Counseling Guidance for Children with Special Needs (Viewed from Psychological Aspects, Socio-Culture and Science and Technology Development)

2019 ◽  
Vol 11 (2) ◽  
pp. 111
Author(s):  
Lia Mareza
Keyword(s):  
Special Needs ◽  
Technology Development ◽  
Personality Development ◽  
Science And Technology ◽  
Advanced Technology ◽  
Counseling Services ◽  
Guidance And Counseling ◽  
Children With Special Needs ◽  
Emotional Instability ◽  
Cultural Aspects

The purpose of this study is to provide an overview of the importance of implementing counseling for children with special needs with auditory barriers in terms of psychological, socio-cultural aspects to the development of science and technology. The role of guidance and counseling services in the realm of education becomes a basic necessity to support the growth and development of students optimally, starting from personality development, social skills (activity daily) to developments related to the potential of students so that they are expected to achieve their actualization later The research method used is descriptive qualitative research, by describing the implementation of counseling in the school, through observation, interviews, and documentation. The results of this study are counseling becomes a primary need for children with special needs, this is because of several aspects such as psychological or emotional instability than the ability to socialize in society such as the influence of bullying or pressure social, to the ability of children with special needs to keep up with as a form of interaction from cyberspace or the use of advanced technology. The implication of this study is that counseling is actually the basic foundation for research in children with special needs that are useful as identification of potential and talent as well as an effort to solve problems that occur for children with special needs

Power fade and capacity fade resulting from cycle-life testing of Advanced Technology Development Program lithium-ion batteries

2003 ◽  
Vol 119-121 ◽  
pp. 865-869 ◽  
Author(s):  
R.B Wright ◽  
J.P Christophersen ◽  
C.G Motloch ◽  
J.R Belt ◽  
C.D Ho ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Technology Development ◽  
Development Program ◽  
Lithium Ion ◽  
Cycle Life ◽  
Advanced Technology ◽  
Capacity Fade ◽  
Life Testing ◽  
Power Fade

scholarly journals Laser light scattering: from an advanced technology development program to experiments in a reduced gravity environment

1994 ◽  
Author(s):  
William V. Meyer ◽  
Walther W. Tscharnuter ◽  
Andrew D. MacGregor ◽  
Henri Dautet ◽  
P. Deschamps ◽  
...  
Keyword(s):  
Light Scattering ◽  
Technology Development ◽  
Laser Light ◽  
Development Program ◽  
Laser Light Scattering ◽  
Advanced Technology ◽  
Reduced Gravity

Twice-Running-Speed Response Due to Elliptical Bearing Clearances

2003 ◽  
Vol 125 (1) ◽  
pp. 64-67 ◽  
Author(s):  
Dara W. Childs
Keyword(s):  
Natural Frequency ◽  
Technology Development ◽  
Space Shuttle ◽  
Rocket Engine ◽  
Development Program ◽  
Advanced Technology ◽  
Running Speed ◽  
Dead Band ◽  
Speed Range ◽  
Speed Response

Yamamoto [1] examined a vertical Jeffcott rotor model with bearing clearances and showed that a small bearing “dead-band” clearance could have a dramatic influence on synchronous rotor response. Recent test results for a turbopump in a liquid-rocket-engine development program showed a twice-running-speed response (2E) on the order of 8 gs over a wide speed range, while synchronous response levels were only at an 0.5 g level. Childs [2] predicted a sharp 2E response for the Advanced Technology Development, High-Pressure Fuel Turbopump (ATD-HPFTP) of the Space Shuttle Main Engine due to bearing clearances, when the running speed was nearly one half of a housing-mode natural frequency, i.e., when the 2E frequency was close to the housing mode natural frequency. However, his model did not predict significant 2E response over a broad running-speed range. Ellipticity of the bearing dead-band clearances was suggested as a possible cause for the observed 2E phenomenon. An extension of Yamamoto’s analysis [1] is presented including bearing ellipticity to examine that proposed explanation. The analysis results show that clearance ellipticity will produce 2E response over a considerable running-speed range during which the bearing clearance is engaged; however, the predicted 2E-response amplitude corresponding to an ellipticity of 0.1 were about 10% of the synchronous levels, and the projected 2E acceleration levels were about 40% of synchronous. The predicted 2E response includes a resonance peak (that can be sharp) at speeds slightly above 25% of the rotor critical speed. The perturbation-analysis results provide an explanation for persistent, lower 2E-response levels observed in many turbopumps, but do not explain the high levels observed with this turbopump.

Twice-Running-Speed Response due to Elliptical Bearing Clearances

2001 ◽  
Author(s):  
Dara W. Childs
Keyword(s):  
Natural Frequency ◽  
Technology Development ◽  
Space Shuttle ◽  
Rocket Engine ◽  
Development Program ◽  
Advanced Technology ◽  
Running Speed ◽  
Dead Band ◽  
Speed Range ◽  
Speed Response

Abstract Yamamoto [1] examined a vertical Jeffcott rotor model with bearing clearances and showed that a small bearing “dead-band” clearance could have a dramatic influence on synchronous rotor response. Recent test results for a turbopump in a liquid-rocket-engine development program showed a twice-running-speed response (2E) on the order of 8 gs over a wide speed range, while synchronous response levels were only at an 0.5 g level. Childs [2] predicted a sharp 2E response for the Advanced Technology Development, High-Pressure Fuel Turbopump of the Space Shuttle Main Engine due to bearing clearances, when the running speed was nearly one half of a housing-mode natural frequency, i.e., when the 2E frequency was close to the housing mode natural frequency. However, his model did not predict significant 2E response over a broad running-speed range. Ellipticity of the bearing dead-band clearances was suggested as a possible cause for the observed 2E phenomenon. An extension of Yamamoto’s analysis [1] is presented including bearing ellipticity to examine that proposed explanation. The analysis results show that clearance ellipticity will produce 2E response over a considerable running-speed range during which the bearing clearance is engaged; however, the predicted 2E-response amplitude corresponding to an ellipticity of 0.1 were about 10% of the synchronous levels, and the projected 2E acceleration levels were about 40% of synchronous. The predicted 2E response includes a resonance peak (that can be sharp) at speeds slightly above 25% of the rotor critical speed. The perturbation-analysis results provide an explanation for persistent, lower 2E-response levels observed in many turbopumps, but do not explain the high levels observed with this turbopump.

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