5,826 research outputs found
Electron beam deflected to determine focal point location
System locates the focal point of an extremely high intensity electron beam. The electron beam is swept and scanned cyclically with deflection coils under a focusing lens, causing the beam focal point to move so the locus of its positions is a spherical surface symmetrical to the beam axis
Electron beam standby absorber system
Electron beam energy is absorbed by deflectors which allow beam distribution over an absorber located between the deflectors and workpiece. The undeflected beam passes through a hole in the absorber when the deflection is de-energized, when energized, the beam is kept to a minimum power level by deflection rate change
Carrier lifetime measurements and recombination characteristics in silicon and studies phenomena associated with radiation induced defect levels
Carrier lifetime measurements and recombination characteristics in silicon and radiation induced defect level
<irradiation damage in n-type silicon crystals< monthly progress report, 1 feb. - 1 mar. 1965
Defect introduction in n-silicon crystal by irradiation with high energy electro
Results of the 1983 NASA/JPL balloon flight solar cell calibration program
The 1983 solar cell calibration balloon flight was successfully completed and met all objectives of the program. Thirty-four modules were carried to an altitude of 36.0 kilometers. The calibrated cells can now be used as reference standards in simulator testing of cells and arrays. Cell calibration data are tabulated as well as the repeatability of standard solar cell BFS-17A (35 flights over a 21-year period)
Charged Particle Radiation Damage in Semiconductors, I- Experimental Proton Irradiation of Solar Cells
Proton irradiation of solar cell
Context dependent learning: its value and impact for workplace education
Purpose – The purpose of this paper is to describe how a management development programme based on situated learning theory resulted in change for individuals, organisational culture and performance. The case study illustrates how new understandings about learning in the workplace and in higher education points towards the need to take account of the context in which learners utilise their knowledge and skills. Design/methodology/approach – Quantitative and qualitative strategies were used to provide an evaluation of the impact of a management development programme in a group of companies. A questionnaire, focus groups and semi-structured interviews were used to collect data on three cohorts of supervisors and middle managers at different stages of the programme. A triangulated approach was adopted towards data analysis that illuminated a broad and deep change process. Findings – Positive cultural change was a significant benefit to the host organisation from the training programme. It was apparent that training can move beyond individual development to bring about organisational gains. Research limitations/implications – Future research might adopt a longitudinal design and facilitate a co-researcher approach using students’ learning logs of workplace experiences. Practical implications – Situated approaches to learning in higher education and the workplace need to be developed further to enhance workplace performance. A proposal is made for “learning consultants” to move between the two environments and facilitate knowledge exchange and improve understanding of the variety of learning contexts in business and educational settings.</p
Characterization of solar cells for space applications. Volume 4: Electrical characteristics of Spectrolab BSF 200-micron Helios cells as a function of intensity and temperature
Electrical characteristics of Spectrolab BSF 200 micron Helios N/P silicon solar cells are presented in graphical and tabular format as a function of solar illumination intensity and temperature
Effects of low energy protons and high energy electrons on silicon
Low energy proton and high energy electron radiation effects on silicon solar cell
Results of the 1984 NASA/JPL balloon flight solar cell calibration program
The 1984 solar cell calibration balloon flight was successfully completed on July 19, meeting all objectives of the program. Thirty-six modules were carried to an altitude of 36.0 kilometers. The calibrated cells can now be used as reference standards in simulator testing of cells and arrays
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