Free-piston stirling component test power converter test results of the initial test phase

1992 ◽  
Author(s):  
George R. Dochat ◽  
James E. Dudenhoefer
Keyword(s):  
Power Converter ◽  
Test Phase ◽  
Test Results ◽  
Initial Test ◽  
Free Piston ◽  
Test Power ◽  
Component Test

scholarly journals Peningkatan Kemampuan Menulis Teks Autobiografi dengan Menggunakan Pendekatan Contextual Teaching And Learning

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Dita Yulianda
Keyword(s):  
Teaching And Learning ◽  
Positive Response ◽  
Learning Approach ◽  
Test Results ◽  
Initial Test ◽  
Final Test ◽  
Average Value ◽  
Significant Difference ◽  
Contextual Teaching ◽  
Strongly Agree

This article will describe learning to write auotobiografi text using Contextual Teaching and Learning approach. The method used in the research, namely the experiment with the design of One-Group Pretest-Postest. Technique of collecting data in the form of test, observation, and questionnaire. The population in the study of students of class XI SMK Nurul Islam Cianjur, with a sample of 22 students. From the results of the study known the average value of the initial test 60.45 and the average value of the final test 80.91. The result of calculation with t-test known value that is 11,41 and value for t.s 0,05 value t = 1,72 and for t.s 0,01 value t = 2.51. Thus, there is a significant difference between students' ability in learning to write autobiographic text before and after using Contextual Teaching and Learning approach. The difference seen in the final test results is higher than the initial test results. The use of Contextual Teaching and Learning approach also get positive response for students, this can be proved by the percentage of student answers for positive response is greater than negative response, that is 30% of students who choose strongly agree (SS)> 4% of students who choose strongly disagree (STS).Keywords: autobiographic text, contextual

scholarly journals Effects of the Dictogloss Method in Teaching Listening Skills to Students

2019 ◽  
Vol 8 (2) ◽  
pp. 69
Author(s):  
Muhaiminah Akib ◽  
Dian Saputra
Keyword(s):  
Mean Value ◽  
Control Group ◽  
Test Results ◽  
Listening Skills ◽  
Initial Test ◽  
Final Test ◽  
Learning Skills ◽  
Average Value ◽  
Quasi Experimental ◽  
Experimental Group

The purpose of this study was to investigate the effect of the dictogloss method in teaching listening to students' listening skills. This research was designed as a quasi-experimental. This study aims to investigate whether a material or treatment yields a different outcome for participants. There are two classes in this study, namely the experimental class (which is a sample to be treated with the dictogloss method) and the control class (using a method other than dictogloss). The results of this study are the results of data analysis showing that the results of learning skills in listening to the experimental group obtained the average value for the initial test of 60.33 and 71 for the final test score. While the control group using conventional methods has a mean value for the initial test of 60.1 and 70 for the final test. T test results also indicate that the significance value is 0,000. The significance value states smaller 0.05, it can be stated that Ha is accepted and Ho is rejected, which means that there is an influence of the dictogloss method in improving listening skills in students

Parental Response to Repeat Testing of Infants with `False-Positive' Results in a Newborn Screening Program

PEDIATRICS ◽  
1984 ◽  
Vol 73 (2) ◽  
pp. 183-187
Author(s):  
James R. Sorenson ◽  
Harvey L. Levy ◽  
Thomas W. Mangione ◽  
Stephen J. Sepe
Keyword(s):  
Newborn Screening ◽  
Screening Program ◽  
Testing Procedure ◽  
Sufficient Information ◽  
Test Results ◽  
Initial Test ◽  
Newborn Screening Program ◽  
Repeat Testing ◽  
Repeat Test ◽  
Test Result

Forty-five percent of the parents of 60 infants being retested in a newborn screening program for metabolic disorders understood that their infant was undergoing retesting because the first test result was abnormal. Fifty-five percent had incorrect or incomplete information, believing that retesting was routine, or that mistakes had been made in the original testing procedure, or they report being told nothing specific about the testing. Parents who were aware that the initial test was abnormal were no more anxious or depressed while waiting for the repeat test results than other parents. At a second interview after learning the normal results of the repeat test, both those parents informed of the initial abnormal result as well as those not informed were less anxious and depressed. However, 36% of the parents of these normal infants reported concern about the health of their infant because of the repeat testing. This concern was not related to a parent's knowledge that the initial test result was abnormal, but was greater in parents reporting that they had not received sufficient information about the screening/testing process and its significance for the health of their infant.

Test Results of Sintered Nanosilver Paste Die Attach for High-Temperature Applications

2016 ◽  
Vol 13 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Paul Croteau ◽  
Sayan Seal ◽  
Ryan Witherell ◽  
Michael Glover ◽  
Shashank Krishnamurthy ◽  
...  
Keyword(s):  
High Temperature ◽  
Cooling System ◽  
Wide Band ◽  
Power Converter ◽  
Test Results ◽  
Wide Band Gap ◽  
Strain Behavior ◽  
Die Attach ◽  
Nanosilver Paste ◽  
Sintered Silver

The emergence of wide band gap devices has pushed the boundaries of power converter operations and high power density applications. It is desirable to operate a power inverter at high switching frequencies to reduce passive filter weight and at high temperature to reduce the cooling system requirement. Therefore, materials and components that are reliable at temperatures ranging from −55°C to 200°C, or higher, are needed. Sintered silver is receiving significant attention in the power electronic industry. The porous nature of sintered nanosilver paste with a reduced elastic modulus has the potential to provide strain relief between the die component and substrate while maintaining its relatively high melting point after sintering. The test results presented herein include tensile testing to rupture of sintered silver film to characterize stress-strain behavior, as well as die shear and thermal cyclic tests of sintered silver-bonded silicon die specimens to copper substrates to determine shear strength and reliability.

scholarly journals FRAMEWORK OF AN AMBIDEXTROUS PROCESS OF IDEA MANAGEMENT SUPPORTING THE DOWNSTREAM PRODUCT DEVELOPMENT PROCESS

2020 ◽  
Vol 1 ◽  
pp. 587-596
Author(s):  
T. Herrmann ◽  
D. Roth ◽  
H. Binz
Keyword(s):  
Design Process ◽  
Process Model ◽  
Development Process ◽  
Product Development Process ◽  
Test Results ◽  
Initial Test ◽  
Front End ◽  
High Degree ◽  
Idea Management ◽  
Radical Ideas

AbstractOne challenge within idea management of the front end of the design process is the handling of radical ideas, meaning ideas with a high degree of novelty. Companies are approaching radical and incremental ideas frequently with the same methods, although many reasoned claims exists for treating ideas differently according to the degree of novelty. The paper aims to address the fact that ambidexterity does not play any specific role in the front end. Therefore, a framework of an extended idea process model based on the idea of ambidexterity is shown and initial test results are presented.

scholarly journals Prediction of fatigue limit of journal bearings considering a multi-axial stress state

2016 ◽  
Vol 68 (3) ◽  
pp. 430-438 ◽  
Author(s):  
Christopher Sous ◽  
Henrik Wünsch ◽  
Georg Jacobs ◽  
Christoph Broeckmann
Keyword(s):  
Stress State ◽  
Axial Stress ◽  
Design Guidelines ◽  
Journal Bearings ◽  
Operating Conditions ◽  
Test Results ◽  
Content Type ◽  
Operation Conditions ◽  
Component Test ◽  
Material Tests

Purpose The purpose of this paper is to investigate the applicability of the quadratic failure hypothesis (QFH) on journal bearings coated with a white metal sliding layer on the prediction of safe and unsafe operating conditions. The hypothesis covers operation conditions under static and dynamical loading. Design/methodology/approach Material tests and elastohydrodynamic, as well as structural, simulations were conducted to provide the required input data for the failure hypothesis. Component samples were tested to verify the results of the QFH. Findings The load bearing capacity of journal bearings was analysed for different operating conditions by the use of the QFH. Results allow for the identification of critical and non-critical loading conditions and are in accordance with component test results. Originality/value Today’s design guidelines for journal bearings do not consider a multi-axial stress state and actual stress distribution. The applied hypothesis enables consideration of multiaxiality inside the sliding surface layer, as well as determining the location of bearing fatigue due to material overload.

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