Variance reduction in aged sample data by the use of lot acceptance test data [missile primary cell testing]

Author(s):  
J. Freeland
1962 ◽  
Vol 84 (3) ◽  
pp. 295-304 ◽  
Author(s):  
G. A. Maneatis ◽  
W. H. Barr

This paper describes a digital computer program which processes rapidly all of the data taken during a steam turbine-generator acceptance test. Specifically, it determines all thermodynamic properties of steam and water, computes corrected test heat rate, and finally develops a contract heat rate for purposes of comparison with manufacturer’s guarantees. The application of this program on two 330-megawatt units is discussed. The thinking leading to certain key decisions involving the ultimate approach taken is presented for the benefit of those contemplating a similar effort.


2018 ◽  
Author(s):  
STIM Sukma

The purpose of this research is to how much facility effect to satisfaction at Hairos Water Park Medan. The sample are 99 people, using random sampling is that provides an equal opportunity for every member of the population to be sample. Data analysis using simple regression test, hypotesis testing the coefficient of determination (R2), and partial test (t test). Data processing using SPSS 20. The rulest showed that the partial facilities have no effect and not significant to visitor satisfaction at Hairos Water park.


2017 ◽  
Author(s):  
John D. Hunn ◽  
Grant W. Helmreich ◽  
John A. Dyer ◽  
Austin T. Schumacher ◽  
Darren J. Skitt

2000 ◽  
Vol 13 (3) ◽  
pp. 344-358 ◽  
Author(s):  
Chih-Min Fan ◽  
Ruey-Shan Guo ◽  
Shi-Chung Chang ◽  
Chih-Shih Wei
Keyword(s):  

Author(s):  
Jeffrey T. Fong ◽  
N. Alan Heckert ◽  
James J. Filliben ◽  
Pedro V. Marcal ◽  
Stephen W. Freiman

Three types of uncertainties exist in the estimation of the minimum fracture strength of a full-scale component or structure size. The first, to be called the “model selection uncertainty,” is in selecting a statistical distribution that best fits the laboratory test data. The second, to be called the “laboratory-scale strength uncertainty,” is in estimating model parameters of a specific distribution from which the minimum failure strength of a material at a certain confidence level is estimated using the laboratory test data. To extrapolate the laboratory-scale strength prediction to that of a full-scale component, a third uncertainty exists that can be called the “full-scale strength uncertainty.” In this paper, we develop a three-step approach to estimating the minimum strength of a full-scale component using two metrics: One metric is based on six goodness-of-fit and parameter-estimation-method criteria, and the second metric is based on the uncertainty quantification of the so-called A-basis design allowable (99 % coverage at 95 % level of confidence) of the full-scale component. The three steps of our approach are: (1) Find the “best” model for the sample data from a list of five candidates, namely, normal, two-parameter Weibull, three-parameter Weibull, two-parameter lognormal, and three-parameter lognormal. (2) For each model, estimate (2a) the parameters of that model with uncertainty using the sample data, and (2b) the minimum strength at the laboratory scale at 95 % level of confidence. (3) Introduce the concept of “coverage” and estimate the full-scale allowable minimum strength of the component at 95 % level of confidence for two types of coverages commonly used in the aerospace industry, namely, 99 % (A-basis for critical parts) and 90 % (B-basis for less critical parts). This uncertainty-based approach is novel in all three steps: In step-1 we use a composite goodness-of-fit metric to rank and select the “best” distribution, in step-2 we introduce uncertainty quantification in estimating the parameters of each distribution, and in step-3 we introduce the concept of an uncertainty metric based on the estimates of the upper and lower tolerance limits of the so-called A-basis design allowable minimum strength. To illustrate the applicability of this uncertainty-based approach to a diverse group of data, we present results of our analysis for six sets of laboratory failure strength data from four engineering materials. A discussion of the significance and limitations of this approach and some concluding remarks are included.


2017 ◽  
Author(s):  
Grant W. Helmreich ◽  
John D. Hunn ◽  
Darren J. Skitt ◽  
John A. Dyer ◽  
Austin T. Schumacher
Keyword(s):  

2015 ◽  
Vol 9 (2) ◽  
pp. 217
Author(s):  
Dwi Kameluh Agustina

This study describes how motivation promotes psychomotor learning outcomes of MTs students.  The objectives of this study are to see (1) learning motivation in practicum activities of sciences subject, and (2) psychomotor learning achievement in the practicum of sceince subject.  This study used descriptive design assigning grade IX of 34 students of MTs Siman Kepung Blitar as sample. Data were collected using questionnair and test.  Data were analyzed using descriptive statistics.  The study found that students average motivation is 83% indicating high motivation and good performance.  Rate percentage of motivation in each category is as follows: (1) interest 90% or good, (2) attention 86% very good, (3) focus of concentration 78% good, and (4) diligent 80% good. Average scor of psychomotor achievement is 80 or very good. 


2020 ◽  
Vol 10 (1) ◽  
pp. 369-379
Author(s):  
St Hateriah ◽  
Rizqy Amelia ◽  
Nur Ilma Ifadah

Latar Belakang : Hasil penelitian tahun 2012, 70% wanita pernah mengalami keputihan, tahun 2013 bulan Januari hingga Agustus hampir 55% wanita pernah mengalami keputihan. Dari hasil studi pendahuluan didapatkan 6 dari 15 siswi tidak mengetahui perbedaan keputihan fisiologis dan patologis serta 7 dari 15 siswi tidak mengetahui cara pencegahan keputihan abnormal.Metode : Metode yang digunakan dalam penelitian ini adalah Pre Eksperimental dengan rancangan penelitian One Group Pretest-Postest. Sampel yang digunakan sebanyak 30 orang (sampel minimal). Data didapatkan dari kuesioner pre test dan post test. Data dianalisis menggunakan uji Marginal Homogeinity.Hasil : Berdasarkan 30 orang responden terdapat 53,3% berpengetahuan baik saat pre test dan 100% berpengetahuan baik pada saat post test. Hasil uji marginal homegeinity yaitu p 0.000 ≤ ɑ 0.05.Simpulan : Ada pengaruh penyuluhan kesehatan reproduksi terhadap pengetahuan remaja putri tentang leukorea.Kata Kunci : Kesehatan Reproduksi, Leukorea, Pengetahuan dan Remaja Putri. ABSTRACTObjective : The results of the study in 2012, 70% of women had experienced vaginal discharge, in 2013 from January to August nearly 55% of women had experienced vaginal discharge. From the results of the preliminary study, 6 out of 15 female students did not know the difference in physiological and pathological vaginal discharge and 7 out of 15 female students did not know how to prevent abnormal vaginal discharge.Technology or Method : The method used in this study was Pre Experimental with the Pretest-Posttest One Group research design. The sample used was 30 people (minimum sample). Data obtained from the questionnaire pre test and post test. Data were analyzed using the Marginal Homogeinity test.Results : Based on 30 respondents there were 53.3% knowledgeable both at the pre test and 100% knowledgeable at the time of the post test. The results of the marginal homegeinity test are p 0,000 ≤ ɑ 0.05.Conslusion : There is the influence of reproductive health counseling on the knowledge of young women about leukorrhea.Keywords : Reproductive Health, Leukorea, Knowledge and Young Women. 


2021 ◽  
Vol 2 (2) ◽  
pp. 108-113
Author(s):  
Asmedy Asmedy

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe STAD terhadap hasil belajar siswa SD Negeri 1 Dompu tahun pembelajaran 2019/2020. Jenis penelitian ini ialah kuasi eksperimen dengan pendekatan kuantitatif. Populasi ialah seluruh peserta didik kelas V yang berjumlah 94 peserta didik. Sampel yang digunakan adalah peserta didik kelas VC yang berjumlah 31 orang sebagai kelas eksperimen dan peserta didik kelas VA yang berjumlah 31 orang sebagai kelas kontrol. Teknik pengambilan sampel dengan menggunakan purposive sample. Data diperoleh melalui pre-test dan post-test kemudian dianalisis menggunakan uji t-test. Data tes akhir kelas sampel dianalisis menggunakan uji-t. Hasil uji-t diperoleh thitung> ttabel,  7,339>1,670. Diperoleh thitung lebih besar dari pada tabel pada taraf kesalahan 5% dan dk sebesar 5. Berdasarkan hipotesis yang diajukan terdapat pengaruh model pembelajaran kooperatif tipe STAD terhadap hasil belajar siswa kleas V SD Negeri 1 Dompu tahun pembelajaran 2019/2020 


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