scholarly journals Estimating backyard waste burning emission: A case study of Tembalang Campus, Diponegoro University

2021 ◽  
Vol 894 (1) ◽  
pp. 012038
Author(s):  
E Sutrisno ◽  
B S Ramadan ◽  
H S Huboyo ◽  
N Ikhlas ◽  
A Karmilia
Keyword(s):  
Organic Waste ◽  
Nox Emissions ◽  
Test Results ◽  
Gas Analyzer ◽  
Waste Sample ◽  
Surrounding Environment ◽  
Random Samples ◽  
Enormous Amount ◽  
Waste Burning

Abstract This study analyzes the distribution and amount of CO, CO2, HC, and NOx gas emissions resulting from the open burning of backyard waste in Diponegoro University. The burned waste sample is taken from surrounding environment of Diponegoro University (Tembalang Campus) by taking 4 random samples (3 kg each). Emissions from CO, CO2, HC, and NOx gases were obtained from the 24 minutes combustion test. Furthermore, the gaseous pollutant emitted is measured using a gas analyzer. The burned waste comprised 73.77% of organic waste, 17.45% of plastic; 4.33% of paper; and 4.45% of other waste. The emission test results show that the highest CO, CO2, HC, and NOx emissions have occurred at 14, 20, 18, and 18 minutes, respectively. The combustion test reveals that an enormous amount of CO, CO2, HC, and NOx gas is emitted during uncontrolled waste burning. Because backyard wastes burning produce significant gaseous pollutants, several efforts are needed to reduce this practice.

scholarly journals Pengaruh Penambahan Campuran Kapur Tohor dan Kapur Barus (C10H16O) Terhadap Kepadatan Lalat Pada Sampah Organik

2019 ◽  
Vol 16 (1) ◽  
pp. 747
Author(s):  
Fadya Artha Aristanova ◽  
Gunung Setiadi ◽  
Isnawati Isnawati
Keyword(s):  
Organic Waste ◽  
T Test ◽  
Effective Dosage ◽  
P Value ◽  
Test Results ◽  
Waste Sample ◽  
Significant Difference ◽  
Before And After ◽  
Quasi Experimental ◽  
Test Result

Abstract: The Effect Of Lime (C10H16O) And Camphor (C10H16O) Against The Density Of Flies On Organic Waste. Fly is a disease-carrying vector so it is important to measure the density for control purposes. One of the controls that is done is on organic waste which is a breading source place of flies. Control is done by affixing the mixture of lime and camphor. This research aimed to determine the effect of mixture of lime and camphor against the density of flies in organic waste that is carried out in the garbage construction site while Southern Loktabat. This type of research is quasi-experimental that experimenting the provision of nine variations of dosage mixture of lime and camphor against the density of flies in organic waste with the organic waste sample was about 0,16m3. This research design used Pretest-posttest design. The analysis using statistical paired sample t-test, Kruskal Wallis test, and Least Significant Differences Test. The measurements showed a decrease in the density of the flies after administration of the lime and camphor mixture. Paired T-test results showed that in each treatment the p-value (2-tailed) <α (0.05) means that there is significant difference of flies density before and after treatment. Kruskal Wallis test result showed the p value (0,000) <α (0.05) which means there are significant differences between dosages. LSD test result showed that the most effective dosage is sixth dosage (35gr camphor+ 55gr lime/0,16m3 waste).

Reliability of germination testing of ex situ conserved seeds: a genebank case study on outsourced analyses

2012 ◽  
Vol 10 (2) ◽  
pp. 134-136 ◽  
Author(s):  
Theo van Hintum ◽  
Rob van Treuren
Keyword(s):  
Confidence Interval ◽  
Crop Wild Relatives ◽  
Wild Relatives ◽  
Ex Situ ◽  
Test Results ◽  
Germination Test ◽  
Crop Species ◽  
Random Samples ◽  
Routine Basis

Germination tests are performed on a routine basis to determine the viability of genebank accessions. The results determine which accessions have to be rejuvenated. The reliability of the germination test results used by the Centre for Genetic Resources, the Netherlands was determined by the retesting of 641 random samples anonymously, in the same year and by the same testing agency as the original tests. Results showed alarmingly low reliabilities, with error levels much higher than expected based on sampling effects. The result of a germination test of a random sample with a germination of 80% was shown to have a 95% confidence interval from 63 to 97%. The errors differed strongly over crops and testing years, and were larger for crop wild relatives than for crop species.

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.

The influence of chemical structure on the anaerobic catabolism of refractory compounds: a case study of instant coffee wastes

1994 ◽  
Vol 30 (12) ◽  
pp. 223-232 ◽  
Author(s):  
N. G. Azhar ◽  
D. C. Stuckey
Keyword(s):  
Industrial Effluent ◽  
Anaerobic Treatment ◽  
Instant Coffee ◽  
Waste Sample ◽  
Coffee Waste ◽  
Refractory Compounds ◽  
Methane Potential ◽  
Bioassay Technique ◽  
High Concentrations

Due to concerns about meeting the strict legislation currently in force, anaerobic treatment is being investigated for the treatment of a variety of waste streams. Instant coffee wastes are one type of industrial effluent that appears to be amenable to anaerobic digestion, and this paper presents some results on the biodegradation of this effluent. The method used was a batch bioassay technique known as the Biochemical Methane Potential assay (BMP), which gave 84% degradation of a composite coffee waste sample. Various fractions of the coffee waste revealed mixed degradation results mostly attributed to structural differences, with the liquid fractions being almost 60% degradable, and the solids filter cake fraction, containing most of the lignocellulosic material being only 9% degradable. Volatile fatty acid (VFA) analysis revealed high concentrations of formate being formed and subsequently degraded in the bioconversion process, and a possible role for formate production was postulated. Variations in structure did not appear to affect the route by which VFAs were produced. Bioconversion of 5-6 major classes of pure organic compounds thought to be potentially recalcitrant in coffee effluent was investigated to determine possible mechanisms of degradation, and the extent to which structural variation affected degradability. The phenolics and chlorogenic acids gave the highest degradation of 70% and 60% respectively, and the cyclic volatiles the least degradation at 40%.

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.

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