Sensitivity Analysis of Semi-Circular Bending Test using Plackett–Burman Matrix

2020 ◽  
Vol 2674 (2) ◽  
pp. 302-312
Author(s):  
Shadi Saadeh ◽  
Yazan Al-Zubi ◽  
Enad Mahmoud ◽  
David Renteria ◽  
Louay Mohammad
Keyword(s):  
Test Method ◽  
Bending Test ◽  
Test Results ◽  
Notch Depth ◽  
Air Voids ◽  
Scb Test ◽  
Negative Effect ◽  
American Society ◽  
Set Up ◽  
Positive Effect

The semi-circular bending (SCB) test is a recently developed test method, adopted by the American Society of Testing and Material (ASTM) as ASTM D8044, to evaluate the cracking resistance of asphalt mixtures. To measure the robustness of the SCB test, a ruggedness test is needed. In this study, the effect of small changes in the key parameters of the test method on the results of the test were numerically investigated. The test method has many variables and set up conditions. Examining all of these parameters would be cumbersome using traditional testing and statistical techniques, as they require a significantly high number of samples. The Plackett–Burman (PB) technique was used to conduct the ruggedness test while reducing the number of tests required. Seven parameters have been examined: notch location, notch depth (low, intermediate and high), air voids, loading rate, and span length. Even using the PB technique, 16 scenarios need to be tested, and each scenario requires three specimens, one for each of the three notch depths. Hence the process requires plenty of time and material. In this study, the SCB test was modeled using a discrete element method (DEM) approach to analyze the fracture behavior of the samples. DEM was used to develop a model that reduced the time and materials required for the SCB test. Results showed that the parameters with most positive effect were intermediate notch depth and notch location, while those with the most negative effect were loading rates and air voids.

scholarly journals Fracture Behavior Analysis of Semi-Circular Bending Test

2019 ◽  
Vol 271 ◽  
pp. 03007
Author(s):  
David Renteria ◽  
Shadi Saadeh ◽  
Enad Mahmoud
Keyword(s):  
Fracture Behavior ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Bending Test ◽  
Random Generation ◽  
Crack Initiation And Propagation ◽  
Air Voids ◽  
Generation Technique ◽  
Initiation And Propagation ◽  
Scb Test

The objective of this paper is to investigate the effect of air voids on the fracture properties of asphalt mixtures using SCB test in Discrete Element Method (DEM). Superpave and Coarse Matrix High Binder (CMHB) mixtures gradation were used to generate the percentages of aggregate, mastic, and air voids within the specimens. Aggregates and air voids were randomly generated for each asphalt mixture case. Model results illustrate that the crack initiation and propagation is controlled by the location of the aggregate particles and air voids in the mixture. Additionally, the absence of air voids above the tip of the notch increases the stiffness of the sample and increase its resistance to failure. The novelty of using DEM and the random generation technique for generating numerical specimens proved to be a useful approach in investigating the properties of the mastic, aggregate and interface as they relate to fracture of asphalt mixtures.

scholarly journals Investigation of Interlaminar Defects and their Influence on Interlaminar Strength

1996 ◽  
Vol 5 (4) ◽  
pp. 096369359600500
Author(s):  
J Ziao ◽  
J Tao
Keyword(s):  
Tensile Strength ◽  
Large Scale ◽  
Peel Strength ◽  
Test Method ◽  
Bending Test ◽  
Four Point Bending ◽  
Transverse Tensile ◽  
Interlaminar Shear ◽  
Transverse Tensile Strength ◽  
Set Up

In this paper, we directed our attention to the interlaminar defects and their influence on the interlaminar strengths. With the aid of a S-570 scanning electron microscope, the morphology and distribution of interlaminar defects were inspected and documented. According to their shape, size and cause of formation, the defects were classified into five types: flakiness void, irregular shaped debond, local imperfectly cured resin, debond in two multi-directional plies, and inhomogeneous fibers and the large scale debond by these fibers. The cause of defects formation was discussed by analyzing the manufacturing process of composites. The influence of defects on the interlaminar strength and its mechanism was analyzed experimentally and theoretically. The results indicate that these defects, with different effects, decrease the interlaminar strength because they form interlaminar cracks, and the interlaminar shear strength is less affected than interlaminar tensile strength, which is measured according to GB4944 test method. To comprehend defects distribution effect, a four-point-bending test method was introduced to measure the interlaminar peel strength, and a discussion was made on the correlation between the interlaminar tensile strength, interlaminar peel strength and in-plane transverse tensile strength. Finally the concept of interlaminar defect coefficient, which can be used to characterize the defects, was set up and the formula to calculate it was proposed.

scholarly journals ANALISIS DETERMINAN AUDIT REPORT LAG

2018 ◽  
Vol 10 (1) ◽  
pp. 22-27
Author(s):  
Gilang Satrya Ramadhan ◽  
Majidah Majidah ◽  
Eddi Budiono
Keyword(s):  
Audit Quality ◽  
Stock Exchange ◽  
Regression Method ◽  
Test Results ◽  
Significant Positive Effect ◽  
Manufacturing Companies ◽  
Audit Report ◽  
Multiple Regression Method ◽  
Negative Effect ◽  
Positive Effect

The purpose of this research is to determine the effect of leverage, size of company, audit quality and accounting result simultaneously or partially to the audit report lag. The type of this research is descriptive verificative. The number of manufacturing companies in the Indonesia Stock Exchange (BEI) over the period of 2011-2015 are 143 companies, then obtained a sample of 110 by purposive sampling. Analysis of data is carried out using multiple regression method. The results showed variable leverage, size company, audit quality and accounting result can explain audit report lag 33.3%. Partial test results showed that leverage did not significantly affect, size company and accounting result have a significant negative effect and audit quality have a significant positive effect on audit report lag.

scholarly journals PENGARUH KECUKUPAN MODAL, RISIKO DAN EFISIENSI TERHADAP KINERJA KEUANGAN BANK SEBELUM DAN MASA PANDEMI COVID-19

2021 ◽  
pp. 1469
Author(s):  
Rosmita Rasyid ◽  
Herni Kurniawati
Keyword(s):  
Regression Analysis ◽  
Multiple Regression ◽  
Sampling Method ◽  
Stock Exchange ◽  
Test Method ◽  
Capital Adequacy ◽  
Average Difference ◽  
Negative Effect ◽  
The Impact ◽  
Positive Effect

The purpose of this study is to examine the impact of covid 19 on financial performance and the factors that are thought to influence it, namely capital adequacy, risk and efficiency. The study was conducted on banking companies listed on the Indonesia Stock Exchange (IDX) in the 2019 and 2020 periods. , which results in a total of 21 banking companies as a sample. The test method used is to test the average difference and multiple regression analysis. The results show that the average ROA, CAR, NPL, LDR and BOPO before covid and during covid are significantly different. Multiple regression results show that LDR has a positive effect on ROA and BOPO has a negative effect on ROA while CAR and NPL have no effect on ROA.Tujuan penelitian ini adalah menguji dampak covid 19 atas kinerja keuangan serta faktor yang diduga mempengaruhinya yakni kecukupan modal, risiko dan efisiensi.Penelitian dilakukan pada perusahaan perbankan yang terdafrat di Bursa Efek Indonesia (BEI) pada periode 2019 dan 2020. Penentuan sampel berdasarkan purposive sampling method, yang menghasilkan jumlah  21 perusahaan perbankan sebagai sampel. Metode pengujian yang dipakai adalah dengan melakukan pengujian beda rata-rata dan analisis regresi berganda. Diperoleh hasil bahwa rata-rata ROA, CAR, NPL, LDR dan BOPO sebelum covid dengan selama covid adalah berbeda signikan, Hasil regresi berganda memperlihatkan bahwa LDR berpengaruh positif atas ROA dan BOPO berpengaruh negatif atas ROA sedangkan CAR, dan NPL tidak berpengaruh atas ROA.

scholarly journals Onshore Test Method for a 3 Unit 60 MW Gas Turbine-Generator Power Module

1985 ◽  
Author(s):  
Johannes Herdlevaer ◽  
Gordon Hugh Black
Keyword(s):  
Test Method ◽  
Test Facility ◽  
Test Results ◽  
Power Module ◽  
Test Program ◽  
The North ◽  
Start Up ◽  
The North Sea ◽  
Increasing Demand ◽  
Set Up

There has been an increasing demand for onshore testing of equipment destined for offshore operation. The justification for this requirement can be summarized as follows: 1. High cost of offshore commissioning where even minor faults detected, constitutes potentially serious problems. 2. Consequenses of delay of platform start-up are enormous. 3. Skilled experienced personel and diagnostic equipment is available onshore, and rectification of new units will benefit from the existence of previous experience. 4. Spare and renewal parts availability. This paper describes the method for string testing of a 3 unit 60 mw utility gasturbine-generator power module built for the gullfaks A platform in the Norwegian sector of the north sea. It describes the test facility and test equipment set up and also the test program which was followed. At the time of writing the paper the test program was barely initiated, and for that reason the test results will be presented in the form of an addendum to this paper during the meeting.

PENGARUH TANGIBLES, RELIABILITY, RESPONSIVENESS, ASSURANCE, EMPHATY TERHADAP KEPUASAN, LOKASI DAN LOYALITAS NASABAH BANK PANIN YOGYAKARTA

EXCELLENT ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 142-158
Author(s):  
Sonia Gumilang
Keyword(s):  
Data Analysis ◽  
Direct Effect ◽  
Pathway Analysis ◽  
External Factors ◽  
Test Results ◽  
Significant Positive Effect ◽  
F Test ◽  
Significant Negative Effect ◽  
Negative Effect ◽  
Positive Effect

This research is aimed to tes the effects of Tangibles, Reliability, Responsiveness, Assurance, Emphaty towards nasabah’ satisfaction, location, loyalty.This research uses prime dataquestionnaire and involves 42 nasabah of Bank Panin Yogyakarta as sample respondents dan using (validity, reliability, t, F, R square and pathways) as data analysis methods.t test results : tangibles, reliability, responsiveness, satisfaction and location have a significant positive effect toward loyalty. Assurance and emphaty have a significant negative effect toward loyalty. F test results : tangibles, reliability, responsiveness, assurance, emphaty, satisfaction and location simultaneously affect significantly loyalty. R square test results 0,998, means loyalty variabels and described by tangibles, reliability, responsiveness, assurance, emphaty variabels with satisfaction and location as an interval variabels 99,8% and the rest 0,20% discribed by other external factors. Pathway analysis results : direct effect of application tangibles, reliability, and responsiveness to loyalty is more effective. Direct effect of tangibles to llyalty is the most dominant effect.Keywords : tangibles, reliability, responsiveness, assurance, emphaty, satisfaction, location,  loyalty

scholarly journals PENGARUH BOARD SIZE PADA NILAI PERUSAHAAN DENGAN MANAJEMEN LABA SEBAGAI VARIABEL INTERVENING

2018 ◽  
pp. 2217
Author(s):  
A.A Pt. Agung Mirah Purnama Sari ◽  
Ni Ketut Rasmini ◽  
I Gst. Ayu Nyoman Budiasih
Keyword(s):  
Earnings Management ◽  
Board Of Directors ◽  
Firm Value ◽  
Stock Exchange ◽  
Empirical Test ◽  
Test Results ◽  
Manufacturing Companies ◽  
Board Size ◽  
Negative Effect ◽  
Positive Effect

This study aims to examined the effect of board size on firm value by using earnings management as an intervening variable. Data were collected from 150 manufacturing companies listed in Indonesia Stock Exchange in the period 2012 – 2015. 84 samples were selected using stratified random sampling method. Data analysis techniques used in this study was the path anlysis. Based on empirical test results can be concluded that board size, board of directors, board of independent commissioner, and board of non independent commissioner has positive effect on firm value. Variable of board size and board of directors has positive effect on earnings management. Meanwhile, board of independent commissioner and board of non independent commissioner has negative effect on earnings management. Variable earnings management negatively affect firm value and the mediation test results show that earnings management is not able to mediate the association between board size with the firm value.

scholarly journals Pengaruh Motivasi, Pengalaman Kerja, Dan Lingkungan Kerja Terhadap Prestasi Kerja Guru SMK Muhammadiyah 1 Ngoro Jombang

2017 ◽  
Vol 2 (2) ◽  
pp. 81
Author(s):  
Amirul Fahmi ◽  
Misti Hariasih
Keyword(s):  
Work Environment ◽  
Work Experience ◽  
Work Performance ◽  
Test Results ◽  
Soft Skill ◽  
The World ◽  
Negative Effect ◽  
Type Data ◽  
Positive Effect

The development of the world of education is now so rapidly advanced that teachers are required to create learners who can survive in the environment and the world of work, this is offset by Soft Skill and Hard Skill that can be implemented in the real world of work. One of the problems that exist in the world of education is the low achievement of teachers this can affect student achievement. Therefore, improving the quality of education, teachers are required to improve the ability to teach and in providing materials supported by props so that teachers will get feedback from the results of teaching. The purpose of this study is to know and analyze the influence of motivation, work experience and work environment partially and simultaneously to the work performance of teachers Smk Muhammadiyah 1 Ngoro JombangApproach in this research is quantitative approach of causality, type of data used is quantitative data type. Data collection techniques used in this study using questionnaires. Population and sample in this research is 28 staff of teacher at SMK Muhammadiyah 1 Ngoro. Data analysis techniques using Multiple Linear Regrations.The Partialy results showed that  the motivation has a negative effect on work performance. work experience has a positive effect on work performance. The work environment has a negative effect on work performance. And simultanly test results show that the motivation, work experience, work environment does not influence jointly to work performance .

scholarly journals RESIDU ANTIBIOTIK PADA SUSU KAMBING PE YANG MENDERITA MASTITIS SUBKLINIS DI DESA AIKMUAL LOMBOK TENGAH

2020 ◽  
Vol 10 ◽  
pp. 58-61
Author(s):  
Rodi Iskandar
Keyword(s):  
Goat Milk ◽  
Subclinical Mastitis ◽  
Test Method ◽  
Antibiotic Residues ◽  
Test Results ◽  
Withdrawal Time ◽  
Milk Samples ◽  
Negative Results ◽  
Dose Method ◽  
Negative Effect

Subclinical mastitis is a disease that often occurs in Etawa (PE) crossbreed goat farms. Farmers in handling this disease usually use antibiotics, giving antibiotics that are not right or according to the procedure can cause residues. The presence of antibiotic residues in goat's milk can have an impact on human health such as poisoning, allergies, and microbiological disorders. This study aims to determine the incidence rate and find the presence of antibiotic residues in the milk of Etawa Peranakan goat who suffer from subclinical mastitis in Aikmual Village, Central Lombok Regency. Test results from 6 samples of etawa-crossed goat milk (PE) suffering from subclinical mastitis using the Bioassay Screening Test method showed negative results containing antibiotic residues. Negative results in the sample are marked by the absence of dead bacteria on paper discs that have been soaked with milk samples from goats that are positive for subclinical mastitis, this is evident from the absence of inhibitory zones formed. The negative effect of this milk sample is due to several possibilities, namely: The stopping period of the drug has been reached and the antibiotics used are in accordance with  the  dose. The duration of the presence of antibiotics in milk depends on several factors,  including: dose, method of administration and type of antibiotic. In  general,  it is applied  that the withdrawal time of narrow spectrum antibiotics is at least 5 days after treatment, for the type of antibiotics that can form a depot (broad spectrum) has a withdrawal time of 1 3 days

scholarly journals Faktor-Faktor yang Mempengaruhi Struktur Modal

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Suharsono Suharsono ◽  
Iwan Setiadi
Keyword(s):  
Capital Structure ◽  
Stock Exchange ◽  
Company Size ◽  
Test Results ◽  
Return On Assets ◽  
Food And Beverage ◽  
Negative Effect ◽  
Equity Ratio ◽  
Asset Growth ◽  
Positive Effect

The purpose of this study was to determine the effect of Profitability, Liquidity, Asset Growth and Company Size on the Capital Structure of Food and Beverage Companies Listed on the Indonesia Stock Exchange in 2012-2018. The populationin this study uses food and beverage sub-sector companies. The total population of this study was 70 samples. The technique used in sampling is purposive sampling. The values tested in this thesis use the formula of financial ratios andregression analysis. The analysis shows profitability, liquidity, and asset growth have a significant negative effect on DER. While the size of the company (size) has a significant positive effect on DER. The test results show that return on assets(ROA), Current Ratio (CR), Asset Growth (Growth) and Firm Size (Size) together (simultaneously) have a significant effect on Debt to Equity Ratio (DER). Keywords: Profitability, Liquidity, Asset Growth, Company Size and Capital Structure.

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