A Method for Determination of Permeability, Skin, and Turbulence Factor From an Open-Flow Potential Test

1988 ◽  
Author(s):  
F.E. Beck ◽  
R.L. Lee
Keyword(s):  
Open Flow ◽  
Flow Potential ◽  
Turbulence Factor ◽  
Potential Test

Determination of methane yield of cellulose using different experimental setups

2014 ◽  
Vol 70 (4) ◽  
pp. 599-604 ◽  
Author(s):  
Bing Wang ◽  
Ivo Achu Nges ◽  
Mihaela Nistor ◽  
Jing Liu
Keyword(s):  
Water Column ◽  
Test System ◽  
Methane Yield ◽  
Biochemical Methane Potential ◽  
Methane Potential ◽  
Bmp Test ◽  
Potential Test

In this work, biochemical methane potential (BMP) tests with cellulose as a model substrate were performed with the aid of three manually operated or conventional experimental setups (based on manometer, water column and gas bag) and one automated apparatus specially designed for analysis of BMP. The methane yields were 340 ± 18, 354 ± 13, 345 ± 15 and 366 ± 5 ml CH4/g VS obtained from experimental setups with manometer, water column, gas bag, and automatic methane potential test system, which corresponded to a biodegradability of 82, 85, 83 and 88% respectively. The results demonstrated that the methane yields of cellulose obtained from conventional and automatic experimental setups were comparable; however, the methane yield obtained from the automated apparatus showed greater precision. Moreover, conventional setups for the BMP test were more time- and labour-intensive compared with the automated apparatus.

scholarly journals Developing instrument of academic potential test analogy verbal ability for undergraduate students

2021 ◽  
Vol 15 (2) ◽  
pp. 234-241
Author(s):  
Efi Septianingsih ◽  
Mohammad Adam Jerusalem
Keyword(s):  
Undergraduate Students ◽  
Verbal Ability ◽  
Sampling Technique ◽  
Test Reliability ◽  
Bartlett’S Test ◽  
Verbal Analogies ◽  
Academic Potential ◽  
Potential Test

The paper aims to develop the instrument about analogy test to measure the level of intelligence of undergraduate students. Determination of the number of samples is done by purposive sampling technique. This instrument is analyzed by factor analysis. Of the 15 items that will be used to develop the academic potential test instrument for verbal analogies, 4 analysis factors. The formation of these 4 factors is from Eigenvalues greater than 1 so that there are only 4 factors that fulfill the requirements. Furthermore, 15 items of the tested instrument to 91 undergraduate student respondents obtained 2 items of invalid instrument with correlation coefficient ≤0.3, Kaiser-Meyer-Olkin (KMO) and Bartlett's test amounted to 0.785 with p 0.05. Trial results from the results of the trial results obtained that the average validity of the questions is 96.8%. Test reliability was analyzed using the Alpha (α) formula of Cronbach. The calculation is done using the help of the IBM SPSS version 22.0 Windows program and the coefficient of 0.806 is obtained. Based on the results of the research, it can be concluded that the quality of the developed instrument items has been valid and reliable.

scholarly journals Implementation of Fuzzy Tsukamoto Algorithm in Determining Work Feasibility

2017 ◽  
Author(s):  
Andysah Putera Utama Siahaan
Keyword(s):  
Grade Point Average ◽  
Fuzzy System ◽  
Membership Functions ◽  
Grade Point ◽  
The Difference ◽  
Parameter Values ◽  
Academic Potential ◽  
Potential Test

The process of determining eligibility for someone is usually given with the same value. The determination of eligibility is determined based on several criteria. These criteria are the ability to Academic Potential Test (APT) and Grade Point Average (GPA). The Tsukamoto fuzzy system is the model used in this paper. Each input variable is divided into two membership functions. There are nine rules of Tsukamoto's model applied. The system also provides following changes of parameters if the parameter values are to be changed. The result of the difference of the employability is given to them. The greater the APT score, the more the value of the feasibility of the work obtained. The more GPA values gained, the greater the value of the workplace eligibility.

Determination of biogas process efficiency - a practice-oriented alternative to the biomethane potential test

2019 ◽  
Vol 7 ◽  
pp. 100201 ◽  
Author(s):  
René Casaretto ◽  
Fritz Thomsen ◽  
Jens Born ◽  
Jens Bo Holm-Nielsen
Keyword(s):  
Process Efficiency ◽  
Biomethane Potential ◽  
Biogas Process ◽  
Potential Test
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