The results of accelerated stress testing of four different types of silicon terrestrial solar cells
NASA Technical Reports Server (NTRS)
Materials Engineering Laboratory Estimation of Acceleration Factors by Comparison of Performance During Accelerated Stress and in Outdoor Conditions R. A. Enzenroth, K.L. Barth,...
National Renewable Energy Laboratory (NREL)
Reported is a program to investigate the reliability attributes of terrestrial solar cells. The accelerated stress test results obtained on all cells since the inception of the program are summarized, as well as specific results obtained during the fourth...
National Technical Information Service (NTIS)
This accelerated test was designed statistically using eight factors (five environmental and three physical previously identified as important to the battery performance) at five levels of stress for each factor. Using these parameters, a full factorial d...
(2) Electrical degradation (chemical-microstruc- ture). (3) Environmental stress factors. Shock. Constant acceleration. Temperature (operating, junction) ...
NASA Website
Research on the reliability of terrestrial solar cells was performed to identify failure/degradation
Results of the performance tests on unencapsulated cells are described. Equivalent circuit parameters, characteristics of a degraded solar cell, and atomic and molecular species at the cell surface are detailed.
Energy Citations Database
Results obtained include the definition of a simplified stress test schedule for terrestrial solar cells based on the work performed during the first program year, and the design and fabrication of improved jigs and fixtures for electrical measurement and...
... Descriptors : *CANTILEVER BEAMS, *BENDING STRESS, *SHEAR STRESSES, DEFLECTION, TRANSVERSE, EQUATIONS, ACCELERATION ...
DTIC Science & Technology
... 5. Report Date Reduction of Incremental Load Factor Acceleration Data to August 1994 Gust Statistics ... ACCELERATION _____ _____ ...
A simple systematic approach using Fourier transform infrared (FTIR) spectroscopy, size exclusion chromatography (SEC) and design of experiments (DOE) techniques was applied to the analysis of aggregation factors for protein formulations in stress and accelerated testings. FTIR and SEC were used to evaluate protein conformational and ...
PubMed
An optical fiber which includes a light transmitting center portion, a protecting layer and a stress preventing layer. The protecting layer concentrically surrounds the center portion, and reduces the effect of environmental factors on the center portion....
Upper temperature limits to accelerated stress testing of plastic-encapsulated integrated circuits were determined and evidence of chip-encapsulant interaction was obtained. Possible yield-reliability correlations were considered and alternatives to MIL-M...
In light of constant or even declining yields, rapid population growth, the government's orientation toward accelerated economic development, and many other stressful factors, it is essential that Egypt's agricultural productivity be revitalized. The key ...
Uniaxial tensile creep and recovery data from polycarbonate at six temperatures and six stress levels are analyzed for nonlinear viscoelastic constitutive modeling. A theory to account for combined effects of two or more accelerating factors is presented.
... VARIATIONS IN ABSOLUTE VISUAL THRESHOLDS CC DURING ACCELERATION STRESS ... DURING ACCELERATION STRESS William J. White ...
Test procedures for accelerated stress-corrosion testing of high-strength aluminum alloys faster and
This lesson plan provides activities for learning about acceleration, and differentiating between vector and scaler quantities. The distinction between velocity and acceleration is stressed.
NSDL National Science Digital Library
Results obtained during the reporting period include the identification of need for a short-interval solar cell tester and the definition of such a tester, the acquisition of significant amounts of data on stress-tested cells of two types from most of the planned stress tests, and progress in understanding the types of measurements and methods of ...
... Title : The Influence of the Stress Intensity Factor on the Fractography of Stress Corrosion Cracking of 316 Stainless Steel,. ...
... Title : DETERMINATION OF RESIDUAL STRESSES FROM STRESS INTENSITY FACTOR MEASUREMENTS. Corporate Author : ...
... _ i_ i NADC-MR-7015 2 July 1970 Activation Energies of Acceleration and Hypoxia Stress ... Activation Energies of Acceleration and Hypoxia Stress ...
For an accelerated life test, let V sub 1,...,V sub k denote k fixed accelerated stresses and let V sub 0 be the normal stress. It is assumed that the probability distributions corresponding to the accelerated stresses differ from the nonaccelerated life ...
Formation stress prediction plays an important role in petroleum production. Understanding ultrasonic wave propagation in a stress-induced anisotropic formation will help us to find an efficient method to correctly predict formation stress or formation pore pressure. In this work, a parallel 3D finite-difference time domain (FDTD) ...
The U.S. Coast Guard has developed a qualification test to screen photovoltaic modules for utilization on marine aids to navigation. The test is based on a combined-environment of hot and cold saltwater immersion and air pressurization. The test has demonstrated a very high acceleration factor and excellent correlation of electrical failures with modules ...
The maximum Van Mises stress and stress direction are of interest far analyzing launch accelerations
... The stress levels of applied stimuli must be as harsh as ... Application of environmental stresses will accelerate the latent (or undetected) defects to ...
Although acute stress accelerates colonic transit, the effect of chronic stress on colonic transit remains unclear. In this study, rats received repeated restraint stress (chronic homotypic stress) or various types of stress (chronic heterotypic stress) ...
