... Page 2. CATHODIC DELAMINATION ACCELERATED LIFE TEST METHOD ... a 1:est for cathodic delamination of such materials in water. ...
DTIC Science & Technology
... ACCELERATED LIFE TESTING OF METALLIC RECTIFIERS ... FACTORS AFFECTING LIFE CHARACTERISTICS CF METALLIC RECTIFIERS ...
... Accession Number : AD0014184. Title : ACCELERATED LIFE TESTING OF METALLIC RECTIFIERS. Descriptive Note : Quarterly rept. no. ...
... Title : ACCELERATED LIFE TESTING EFFECTS ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : Report Date : JUL 1977. ...
... ADD873178. Title : ACCELERATED LIFE TESTING EFFECT ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : ...
Efforts at Siemens Westinghouse Power Corporation (SWPC) have been focused on development of hot gas filter systems as an enabling technology for advanced coal and biomass-based gas turbine power generation applications. SWPC has been actively involved in the development of advanced filter materials and component configuration, has participated in numerous surveillance programs characterizing the ...
Energy Citations Database
CMOS MICROCIRCUIT CHARACTERISTICS. Phase II Report. Interim. January 1977 to July 1977. (NASACdi-150381). ACCELERATED LIFE TESTING. N77-31406 ...
NASA Website
... Accession Number : ADA063841. Title : A New Approach to Inference from Accelerated Life Tests. Descriptive Note : Technical rept. ...
... PHYSICAL PROPERTIES, HIGH TEMPERATURE, FABRICATION ... DATA ACQUISITION, TUNING, LIFE TESTS, ACCELERATED TESTING. ...
Environment, static acceleration, vibration, shock, gas contamination, and life tests in development
NASA Technical Reports Server (NTRS)
... DEGRADATION, WEAR, LIFE TESTS, COMMUNICATION SATELLITES, ACCELERATED TESTING, LUBRICATION, ANTENNA COMPONENTS. ...
... Title : NMOS VOLTAGE BREAKDOWN CHARACTERISTICS COMPARED WITH ACCELERATED LIFE TESTS AND FIELD USE DATA. ...
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 ...
National Technical Information Service (NTIS)
... Accession Number : AD0748252. Title : Temperature and Temperature Gradients for Accelerated Life Tests of Nickel-Cadmium Cells. ...
reasonable amount of time, an accelerated life test at high temperatures is used . This type of accelerated test is based on the observation that ...
... TECHNIQUES FOR MICROCIRCUITS - EVALUATION OF HIGH TEMPERATURE (473K - 573K) ACCELERATED LIFE TEST TECHNIQUES ...
(DPA), Highly Accelerated Life Test (HALT) and. Dielectric Voltage Breakdown Strength. The data analysis included a comparison of the 2000-hour life test ...
... Abstract : The results of a matrix of high-temperature accelerated life tests, 125C life tests, and 250 hour 250C lot acceptance tests were evaluated ...
Accelerated life testing of a product under more severe than normal conditions is commonly used to reduce test time and costs. Data collected at such accelerated conditions are used to obtain estimates of the parameters of a stress translation function. T...
The report, in two volumes, is devoted to an investigation into the state-of-the-art of methods for reducing the time and expense associated with life testing, particularly as it relates to parts. The areas investigated are divided into accelerated testin...
In this paper we propose a model for accelerated life testing which differs from those considered in the past. The author's model does not require thd usual assumptions about the failure distributions and the acceleration functions. The author's approach ...
The development of new composite materials, which lack the historical field data base, has led to the need for an accelerated life testing method applicable to composites. Accelerated life testing by increasing the sustained stress levels requires the mod...
Accelerated life testing (ALT) is performed by testing specimens under more severe conditions than encountered during normal operational conditions. That is, more severe values of stressors such as pressure, temperature, etc., are used. Based on the test ...
We present a new approach for inference from accelerated life tests. Our approach formulates such problems as inference under Kalman filter models with correlated observation errors. We restrict attention to exponential life distributions, and the power r...
Least squares estimators of the parameters of the generalized Eyring Model are obtained using data from censored life tests conducted at several accelerated environments. These estimators are obtained after establishing that the Gauss-Markov conditions fo...
Least squares estimators of the parameters of the generalized Eyring Model are obtained by using data from censored life tests conducted at several accelerated environments. These estimators are obtained after establishing that the Gauss-Markov conditions...
... AD-A263 265 COMPOSIT UNIT ACCELERATED LIFE TEST OF THE HIGH GAIN ARRAY Contract Number N00014-93-C-2021 January 28, 1992 ...
... Accession Number : ADA263265. Title : Composite Unit Accelerated Life Test of the High Gain Array. Descriptive Note : Final rept. Jul-Nov 92,. ...
A process was developed for the accelerated life testing of a particular cell or battery which comprises the comparison and extrapolation of the end of discharge voltages plotted versus the logarithm of the cycle number in combination with prior knowledge...
This is a partly philosophical discussion of the problems of conducting accelerated life tests experiments and analyzing data from such experiments. The objective is to predict life at a specified stress level or radiation dose. The concept of information is presented, and its quantification via entropy is discussed.
The report describes results of some research in accelerated life testing and related topics. The report is divided into seven sections, each section dealing with a particular category of the research. Each section contains bibliographic citations of pape...
... Each of the components is assumed to have an independent Weibull time to ... A general model is used for the scale parameter which includes the ...
... clamps and compared to a standard non-clamped polyurethane connector in accelerated life testing. It was determined that a mechanical clamp ...
... for a pulse transformer as is required by a high-power quasi ... reliability testing, the pulsed character is useful in that accelerated life testing is feasible ...
... Pagination or Media Count : 202. ... DEPOSITION, SPUTTERING, PRODUCTION, TANTALUM COMPOUNDS, OXIDES, GOLD, METAL COATINGS ...
... Descriptors : *Army research, *Applied mathematics, *Model theory, *Reliability, *Life tests, Operations research, Accelerated testing, Bayes ...
governing variables to achieve high reliability in the Stirling Radioisotope ..... approach would be to perform accelerated life testing at elevated ...
... ACTIVATION ENERGY AND TIME, ACCELERATED-LIFE TESTS ACCURATELY DETERMINE THE INFANT-MORTALITY RATE OF PLASTIC ...
The CET for the lead-free solder project is based on a modified Highly Accelerated Life. Test (HALT), a process in which products are subjected to ...
... and stimulation of ideas. ... This experiment was devised because large carbonate con- S centrations had frequently been found to be associated with ...
... ASSURANCE, *WAFERS, *ACCELERATED TESTING, TEST AND ... SEMICONDUCTORS, HIGH ENERGY ... OXIDES, VENDORS, LIFE TESTS, IONIC ...
... OF CONTACT LIFETIME ON TEMPERATURE FOR THIN FILM W CONTACTS SPUTTER DEPOSITED ONTO SI-CE THERMOPILES WITH A ...
A solar array drive mechanism, was subjected to an accelerated life test under vacuum. The accelerated life test involved operating the mechanism at increased speed sufficient to accrue the equivalent of 10 years normal speed running (1 revolution of the ...
amount of time, an accelerated life test at either high temperature or other acceleration factor is used. In general, the high temperature condition is used ...
Project is based on a modified Highly Accelerated Life Test (HALT), a process in which products are subjected to accelerated environments to ...
HALT Highly Accelerated Life Test. HAST Highly Accelerated Stress Testing. HBT Heterojunction Bipolar Transistor. RT Room Temperature ...
Jun 16, 2011 ... Keywords: Accelerated life testing, service life, performance standards, wood preservatives, deterioration, biodegradation, fungicides, ...
Treesearch
Using very distant supernovae as standard candles, one can trace the history of cosmic expansion and try to find out what's currently speeding it up.
NASA Astrophysics Data System (ADS)
candles," which allows calculation of their distance from Earth. Observations revealed dark energy was flinging the objects out at accelerating speeds. ...
The application of high temperature accelerated test techniques was shown to be an effective method of microcircuit defect screening. Comprehensive microcircuit evaluations and a series of high temperature (473 K to 573 K) life tests demonstrated that a f...
highly elliptical orbit will have perihelion close to the Sun and aphelion at more than 5 AU. ..... degradation mechanisms and accelerated life testing. ...
-55�C to 300�C. The ability to test large sample populations in parallel reduces the ...... ASI can assist in developing a test plan, characterizing the ...
Mr. Pickel has been actively involved in the study of nuclear and space radiation mechanisms and effects ..... This multilevel modeling approach has been ...
chronic mortality from raw acute toxicity data using accelerated life testing and linear regression analysis. Currently ORD is developing internet versions of ICE and ACE for use...
Science.gov Websites
... the grant is the development of methods ... Accelerated life testing; Reliability growth models; Inference ... life of gun barrels; Competing risk theory. (kr). ...
... Allowable acceleration normal to axis 12 g ... PARAMETER (OF) SAMPLES SE HIGH LOW ... annually to attempt further extension of the shelf life of this ...
... high temperature operational life test (HTOL), and highly accelerated stress test ... Considering extensive testing and screening of systems for space ...
Testing? " Based on modified Highly Accelerated Life Test (HALT). Goal: Quickly break products and learn from the failure modes ...
... EXPECTANCY(SERVICE LIFE), *DEGRADATION, MILITARY ... RANGE(TIME), HIGH STRENGTH, ACCELERATED TESTING, ROOFS. ...
OARS uses a high emissivity (>0.999) blackbody cavity with ... subjected to a full accelerated life test that was designed to ...
May 6, 2008 ... It is also highly desirable that the spaceflight system performance ... For test , this can include accelerated life testing, fleet leader ...
wide range of environmental and accelerated life testing appropriate to the ..... s clearly of value for a PV-STF to be highly adaptable, allowing ...
Based on Modified Highly Accelerated Life Test. (HALT). Benefits. ? Identify Design and Process Problems. ? Time Frame is Shorter and Faster ...
When the reliability of capacitors is evaluated, a highly accelerated life test (HALT) is usually adopted since it is a time-efficient method of determining ...
physical characterization of bare and platinized supports; fuel cell construction; steady state and accelerated life testing; scale-up.
important Weibull parameters, highly accelerated life test data, and sample size issues. The goal of this research effort was to determine if any of the ...
... observed from available accelerated GEO tests ... particularly at high operating DOD ... REGRESSION ANALYSIS, LIFE TESTS, ELECTRIC CHARGE. ...
Jul 14, 2006 ... The Combined Environments Test (CET) was based on a modified Highly Accelerated Life Test. (HALT), a process in which products are subjected ...
array bar that combined with the relatively high current requirements ... Test Unit (ETU) had been constructed and tested, and accelerated life tests were ...
highly efficient current collection s ystem wits devised for the cell. ...... accelerated life tests: test procedures, usually conducted at ...
greater by a need for high- to moderate-resolution data. ...... accelerated life test early, root out deploy mechanism problems on STARs ...
... temperature effects on avalanche breakdown in GaAs MESFETs to determine if this failure mechanism is accelerated by high temperature life tests. ...
testing is used extensively to achieve a high confidence of hardware life. 2. Accelerated Life Testing is a limited method to predict future ...
... The results demonstrated the capability of the accelerated life test rig to provide high cycle rate and adequate flexure to fatigue the film samples. ...
Jun 16, 2011 ... Keywords: Stainless steel, steel, zinc, polarisation, accelerated life testing, direct electric currents, coatings, deterioration, ...
... MIL-STD-883 Class B screening and accelerated life testing. The results showed that prestressing, even at the relatively high levels used, had no ...
May 1, 2007 ... Highly accelerated life testing (HALT) can be used to increase robustness; particularly for electronics parts and assemblies exposed to ...
High reliability in this context is limited to parts designed and fabricated ... though rooted in the results of destructive and accelerated life testing, ...
Four alternate screening methods will be discussed in this paper: Highly accelerated life test (HALT), forward voltage drop tests for evaluating wire- bond ...
Sep 1, 1971 ... Subject Terms: DATA PROCESSING; DESTRUCTIVE TESTS; ELECTRIC BATTERIES; ELECTRIC POTENTIAL; ELECTROCHEMICAL CELLS; FAILURE MODES; ...
... FATIGUE LIFE OF LEADS AND SOLDER ... DURING HIGH-LEVEL TESTING IS POSSIBLE ... THE EXPONENT FOR COPPER LEAD-WIRE FAILURES ...
... Colloid thrusters operate by electrostatically accelerating charged droplets ... capable of providing a high degree of ... Life tests of the ST7 thrusters have ...
