Multi-component out-of-specification test results: a case study of concentration of pesticide residues in tomatoes

2011 ◽  
Vol 16 (7) ◽  
pp. 361-367 ◽  
Author(s):  
Ilya Kuselman ◽  
Paulina Goldshlag ◽  
Francesca Pennecchi ◽  
Cathy Burns
Keyword(s):  
Pesticide Residues ◽  
Test Results ◽  
Specification Test

PENGKAJIAN KEKUATAN BETON STRUKTUR JEMBATAN PASCA KEBAKARAN

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Sudarmadi Sudarmadi
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Concrete Testing

In this paper a case study about concrete strength assessment of bridge structure experiencing fire is discussed. Assessment methods include activities of visual inspection, concrete testing by Hammer Test, Ultrasonic Pulse Velocity Test, and Core Test. Then, test results are compared with the requirement of RSNI T-12-2004. Test results show that surface concrete at the location of fire deteriorates so that its quality is decreased into the category of Very Poor with ultrasonic pulse velocity ranges between 1,14 – 1,74 km/s. From test results also it can be known that concrete compressive strength of inner part of bridge pier ranges about 267 – 274 kg/cm2 and concrete compressive strength of beam and plate experiencing fire directly is about 173 kg/cm2 and 159 kg/cm2. It can be concluded that surface concrete strength at the location of fire does not meet the requirement of RSNI T-12-2004. So, repair on surface concrete of pier, beam, and plate at the location of fire is required.

Challenges to Overcome and Scaffolding to Build on

2019 ◽  
Vol 9 (3) ◽  
pp. 50-67
Author(s):  
Hao Yang ◽  
Zhiqiang Ma
Keyword(s):  
Teacher Perceptions ◽  
Flipped Classroom ◽  
Public University ◽  
Test Results ◽  
Learning Behavior ◽  
Long Term Effects ◽  
Exploratory Case Study ◽  
Flipped Classrooms

While current research on the flipped classroom generally focuses on test results and (or) student/teacher perceptions as a measurement of its pedagogical efficacy, students' adaptation to it and the essential conditions for its application are rarely explored. This exploratory case study aims to rectify this by examining how university students adapted to flipped classrooms implemented in a public university in East China. The findings suggest that while the flipped model is impeded by entrenched polarity between students in terms of their learning dispositions and academic competence, students do develop a prototype of theories of learning, a sense of better self through learning from their peers and an awareness of the importance of intrinsic motivation. A gradualist approach is thus proposed for implementing flipped classrooms, which requires longitudinal studies accordingly to understand its long-term effects on learning behavior hitherto left unexplored.

scholarly journals Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Yong-feng Tang ◽  
Han-cheng Chen ◽  
Zhen-wei Ye ◽  
Ting-jin Liu ◽  
Yu-bing Yang
Keyword(s):  
Regression Equation ◽  
Shield Tunnel ◽  
Outer Diameter ◽  
Test Results ◽  
Bending Rigidity ◽  
Segmental Lining ◽  
Ring Model ◽  
Scale Models ◽  
Elastic Stage

The transverse effective rigidity ratio is a key parameter when the uniform rigidity ring model is adopted to design or numerically analyse segmental lining structures commonly used on a shield-driven tunnel. Traditionally, the transverse effective rigidity ratio η is treated as a constant, which can be evaluated through theoretical analysis and model tests. In this study, scale models were designed and tested to investigate the variation of the transverse effective rigidity ratio in the segmental linings’ flattening deformation process. The test results suggested that in the elastic stage, the transverse effective rigidity ratio fluctuated between 0.667 and 0.734 for the stagger-jointed rings and fluctuated between 0.503 and 0.642 for the straight-jointed rings. When segmental linings were squashed and started to crack at the circumferential joints, the transverse effective rigidity ratio decreases sharply. Then, a regression equation was obtained to fit the variation trend of η with the increase of horizontal convergence to the outer-diameter ratio (ΔD/Dout). Finally, in a case study, the regression equation was adapted to determine the value of η of an operated shield tunnel which was once surcharged accidentally and deformed severely so as to numerically predict the prospective deformation induced by the upcoming adjacent excavation. Numerical results indicated that as the value of η decreases, the horizontal convergences of shield tunnel induced by adjacent excavation increase significantly and even more than doubled in the case study. Comparatively, through taking account of the operating tunnels’ exiting transverse deformation, the predicted deformation tends to be unfavourable.

scholarly journals Investment Of Fixed Equipment Assets On Improving Profitability (case study cv.Parahyangan Express BranchKarawang)

2020 ◽  
Vol 17 (1) ◽  
pp. 30-42
Author(s):  
Sri Suartini ◽  
Dian Hakip Nurdiansyah ◽  
Sheli Rosdayanti
Keyword(s):  
Primary Data ◽  
Test Results ◽  
Fixed Asset ◽  
Financial Report ◽  
Verification Method ◽  
Average Value ◽  
Fixed Assets ◽  
Data Source ◽  
Fixed Asset Investment

The purpose of this study to determine how much influence of fixed asset investment vehicles against profitability CV. Parahyangan Express Karawang Branch. This research uses a descriptive verification method with a primary data source that is a financial report CV. Parahyangan Express Karawang Branch period 2007 to 2016. The result of this research is r average investment value CV. Parahyangan Express in the period 2007 until 2016 tends to decrease, the average value of profitability CV. Parahyang n Express in the period 2007 to 2016 tends to decline. Based on test results t comparison t arithmetic with t table showing 2.840> 2.093 t count more than t table. vehicle fixed asset investment has a significant effect on profitability in a CV. Parahyangan Express. The percentage of influence of fixed asset investment of 30% means 30 % development of profitability CV. Parahyangan Express is influenced by in-kind fixed assets while 70 % is influenced by other factors not examined in this study.

scholarly journals INFLUENCE OF MOTIVATION TO RESULT OF COGNITIVE LEARNING IN INTERGRATED NATURAL SCIENCES MODEL TEAM GAMES TOURNAMENT (TGT) ASSITANCE BY YUGIOH CARD

2019 ◽  
Vol 18 (2) ◽  
pp. 20
Author(s):  
Reda Harwinanda
Keyword(s):  
Science Learning ◽  
Cognitive Learning ◽  
Natural Sciences ◽  
Learning Motivation ◽  
Test Results ◽  
Simple Linear Regression ◽  
Team Games ◽  
Post Test ◽  
Positive Effect

The purpose of this study was to examine the effect of motivation on the result cognitive learning of the model TGT assisted YuGiOh Card. The population in this study were students of class VII semester 1 with the number of 16 students at MTs Baitul Amin Bali. The type of research design used was pre-experimental design with a one-shot case study. The study used 2 (two) variables examined in this study, namely motivation and result cognitive learning. The method used in data collection in this research is questionnaire (questionnaire), documentation and test. The collected data were analyzed using simple linear regression. Based on the motivation data obtained using themodel TGT assisted by the YuGiOh card in this study, it shows that students who are in the very good motivation category are 62.5% and good categories are 37.5%. Data on students' resultcognitive learning from post-test results can be categorized very well by 6%, both by 31%, enough by 44% and less by 19%. The influence of motivation on result cognitive learning using the model TGT assisted YuGiOh card is 27.2% while the remaining 72.8% is influenced by learning readiness, social support and learning facilities. The results showed that learning motivation had a positive effect on result cognitive learning in science learning using the model TGT assisted by YuGiOh card.

scholarly journals Design of multilayer microfluidic paper chip and its visual detection of pesticide residues

2020 ◽  
Vol 11 ◽  
pp. 170-182
Author(s):  
Li zhi Li ◽  
Han Ping Mao
Keyword(s):  
Pesticide Residues ◽  
Visual Detection ◽  
Channel Structure ◽  
Test Results ◽  
Mixed Effect ◽  
Detection Range ◽  
Long Time ◽  
Paper Chip ◽  
Channel Structures ◽  
High Repeatability

With the increase of China's grain production, the use of pesticides is gradually increasing. Traditional pesticide detection takes a long time and requires expensive experimental instruments, which is not conducive to the rapid and accurate detection of pesticide residues in the field. To solve this problem, this paper proposes a visual detection method of pesticide residues based on multi-layer microfluidic paper chips. The internal channel structure of paper chip is designed from the perspective of efficient mixing. Through the simulation of the mixed effect of three kinds of staggered channel structures, which are arc type, triangle type, and ladder type, the "ladder-type h-0.3, s-2.6" is selected as the best-staggered structure, and the mixing strength is 0.91534. The best simulation structure was tested by a colored reagent, and the image processing of 15 test results was carried out with MATLAB. The average mixing strength was 0.84, and the and the standard deviation was 0.022. The visual detection experiment of acetamiprid and profenofos in cabbage samples was carried out by using the device，The detection range of acetamiprid was 4~72 μg/kg, and the detection range of profenofos was 3~54 μg/kg . The recovery of acetamiprid was 75%~85%, and the recovery of profenofos was 80%~90%. The detection range and recovery rate indicate that the device has high repeatability and accuracy in the actual sample detection

scholarly journals PENGARUH PENGETAHUAN MASYARAKAT DAN MINAT PENERAPAN NILAI ISLAM TERHADAP KEPUTUSAN MENGGUNAKAN TABUNGAN PERBANKAN SYARIAH (Studi Kasus Masyarakat Kota Langsa)

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Faisal Umardani Hasibuan ◽  
Rahma Wahyuni
Keyword(s):  
Sampling Technique ◽  
Research Data ◽  
Islamic Banking ◽  
Test Results ◽  
Analysis Techniques ◽  
Knowledge Variable ◽  
Data Analysis Result ◽  
Simultaneous Influence ◽  
Islamic Values

Abstract This research is done to determine: (1) the influence of people’s knowledge on the decision tgggo use Islamic Banking product, (2) The influence of Islamic values applicatgion on the decision to use Islamic Banking product (The case study of Langsa Town’s Community). The research uses a quantitative approach. The sampling technique is done by purposive sampling. The research data is collected by distributing quantionnaires to 100 respondent. The analysis techniques used are classic assumption test, multiple regression and hypothesis analysis. Based on the data analysis result by using SPSS version 17 system, it concludes that on adjusted R-Square test, 38.5 %shows relationship and contribution of variables on the people’s knowledge and interest of Islamic values application in influencing the decision tu use the saving products and the remaining 61.5 % is explained by other variables of knowledge and interest in the application of Islamic values have an influence on the decision to use saving products. The results F (simultaneous) F count of 32.014 > 3.09 F table so that it can be concluded that Ha is accepted, meaning that there is a simultaneous influence (together) of people’s knowledge variables and interest in applying Islamic values to the decision to use savings products. T test results (partial) variable knowledge of the decision to use savings products obtained t count of 4.408 > 1.660 t table, it means that Ho is rejected and Ha is accepted. Thus the people’s knowledge variable has a partially significant influence on people’s decisions to use Islamic Banking savings products.

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