Pub Date : 2021-11-10DOI: 10.12962/j20882033.v32i2.10483
Lailly S. Qolby, J. L. Buliali, Ahmad Saikhu
{"title":"Performance Study Of Uncertainty Based Feature Selection Method On Detection Of Chronic Kidney Disease With SVM Classification","authors":"Lailly S. Qolby, J. L. Buliali, Ahmad Saikhu","doi":"10.12962/j20882033.v32i2.10483","DOIUrl":"https://doi.org/10.12962/j20882033.v32i2.10483","url":null,"abstract":"","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91109229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30eCollection Date: 2021-01-01DOI: 10.6026/97320630017805
Nidhi Thakur, Vishal Kumar, Ankita Agarwal, Soni Kumari
Gingivitis is the most common form of oral disease especially among patients undergoing fixed orthodontic treatment. Green tea, which is extensively used in Asian countries, can help to improve the overall gingival health, which can be assessed by using the gingival indices. Evaluation of the effectiveness of green tea on the gingival health of patients undergoing Orthodontic treatment is of interest. 40 otherwise healthy patients undergoing fixed orthodontic treatment were randomly divided in two groups namely (1) study group and (2) control group. Gingival indices were scored for all the patients. Study group was given mouth rinse with green tea extract and control group was given placebo with no green tea extract. Gingival indices were measured for all the patients after 21 days. Mann Whitney U test and Wilcoxon test was used for statistical analysis. The gingival indices scoring in which the values before and after the use of mouthwash were compared. The p value was found to be statistically significant (p<0.05) in study group. But in control group statistical significant could not be reached.
牙龈炎是最常见的口腔疾病，尤其是在接受固定矫正治疗的患者中。在亚洲国家广泛使用的绿茶有助于改善牙龈的整体健康，这可以通过牙龈指数来评估。评估绿茶对接受正畸治疗的患者牙龈健康的效果很有意义。40 名接受固定正畸治疗的健康患者被随机分为两组，即（1）研究组和（2）对照组。对所有患者的牙龈指数进行评分。研究组给予含绿茶提取物的漱口水，对照组给予不含绿茶提取物的安慰剂。21 天后测量所有患者的牙龈指数。采用曼-惠特尼 U 检验和威尔科克森检验进行统计分析。比较使用漱口水前后的牙龈指数评分。发现 p 值具有统计学意义（p
{"title":"A double blind randomized controlled trial to evaluate the efficacy of green tea in gingivitis.","authors":"Nidhi Thakur, Vishal Kumar, Ankita Agarwal, Soni Kumari","doi":"10.6026/97320630017805","DOIUrl":"10.6026/97320630017805","url":null,"abstract":"<p><p>Gingivitis is the most common form of oral disease especially among patients undergoing fixed orthodontic treatment. Green tea, which is extensively used in Asian countries, can help to improve the overall gingival health, which can be assessed by using the gingival indices. Evaluation of the effectiveness of green tea on the gingival health of patients undergoing Orthodontic treatment is of interest. 40 otherwise healthy patients undergoing fixed orthodontic treatment were randomly divided in two groups namely (1) study group and (2) control group. Gingival indices were scored for all the patients. Study group was given mouth rinse with green tea extract and control group was given placebo with no green tea extract. Gingival indices were measured for all the patients after 21 days. Mann Whitney U test and Wilcoxon test was used for statistical analysis. The gingival indices scoring in which the values before and after the use of mouthwash were compared. The p value was found to be statistically significant (p<0.05) in study group. But in control group statistical significant could not be reached.</p>","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"22 1","pages":"805-808"},"PeriodicalIF":1.9,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9049084/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88523421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-03DOI: 10.12962/j20882033.v32i1.7092
Hendrix Abdul Ajiz, L. J. Mawarani, W. Widiyastuti, H. Setyawan
One of the promising solutions to overcome the liquid loading problem in natural gas production is using a foaming agent. The extreme condition in the gas well causes the foam used tends to break up. Therefore, it is required to enhance the foam stability by adding a stabilizer agent. This research aims to investigate the effect of silica nanoparticles as a surfactant stabilizer to obtain a high-stability foam using silica nanofluid. Silica nanofluid was synthesized from sodium silicate solution by the sol-gel method. Then, the colloidal silica was added to the surfactant solution without a coupling agent. The effects of aging time and silica concentration were investi-gated. The results show that the surface tension tends to increase with the increase of aging time and silica concentration but decrease in foam stability which is indicated by a decrease in the foam half-life time. The best foam stability is obtained in silica nanofluids with an aging time of 6 hours and a silica concentration of 30 ppm, which shows a foam half-life of 42 hours and can improve foam stability with several parameters representing the conditions of the gas well.
{"title":"High-Stability Foam of Silica Nanofluid to Overcome Liquid Loading in Enhancing Natural Gas Production","authors":"Hendrix Abdul Ajiz, L. J. Mawarani, W. Widiyastuti, H. Setyawan","doi":"10.12962/j20882033.v32i1.7092","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.7092","url":null,"abstract":"One of the promising solutions to overcome the liquid loading problem in natural gas production is using a foaming agent. The extreme condition in the gas well causes the foam used tends to break up. Therefore, it is required to enhance the foam stability by adding a stabilizer agent. This research aims to investigate the effect of silica nanoparticles as a surfactant stabilizer to obtain a high-stability foam using silica nanofluid. Silica nanofluid was synthesized from sodium silicate solution by the sol-gel method. Then, the colloidal silica was added to the surfactant solution without a coupling agent. The effects of aging time and silica concentration were investi-gated. The results show that the surface tension tends to increase with the increase of aging time and silica concentration but decrease in foam stability which is indicated by a decrease in the foam half-life time. The best foam stability is obtained in silica nanofluids with an aging time of 6 hours and a silica concentration of 30 ppm, which shows a foam half-life of 42 hours and can improve foam stability with several parameters representing the conditions of the gas well.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82008579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-30DOI: 10.12962/j20882033.v32i1.7074
Shirin Kordnoori, H. Mostafaei, M. Ostadrahimi, S. Banihashemi
Nowadays, Evolutionary Game Theory which studies the learning model of players, has attracted more attention than before. These Games can simulate the real situation and dynamic during processing time. This paper creates the Evolutionary Markov Games, which maps players’ strategy-choosing to a Markov Decision Processes (MDPs) with payoffs. Boltzmann distribution is used for transition probability and the General Regression Neural Network (GRNN) simulating the strategy-choosing in Evolutionary Markov Games. Prisoner’s dilemma is a problem that uses the method and output results showing the overlapping the human strategy-choosing line and GRNN strategy-choosing line after 48 iterations, and they choose the same strategies. Also, the error rate of the GRNN training by Tit for Tat (TFT) strategy is lower than similar work and shows a better result.
目前，研究玩家学习模式的进化博弈论受到了越来越多的关注。这些游戏可以模拟真实情况和动态过程中的处理时间。本文创建了进化马尔可夫博弈，将玩家的策略选择映射到具有收益的马尔可夫决策过程(mdp)。转移概率采用玻尔兹曼分布，通用回归神经网络(GRNN)模拟进化马尔可夫博弈中的策略选择。囚徒困境是利用人类策略选择线与GRNN策略选择线在48次迭代后重叠的方法和输出结果，并选择相同策略的问题。此外，采用以牙还牙(Tit for Tat, TFT)策略训练的GRNN的错误率低于同类方法，并取得了较好的训练效果。
{"title":"The Efficacy of Choosing Strategy with General Regression Neural Network on Evolutionary Markov Games","authors":"Shirin Kordnoori, H. Mostafaei, M. Ostadrahimi, S. Banihashemi","doi":"10.12962/j20882033.v32i1.7074","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.7074","url":null,"abstract":"Nowadays, Evolutionary Game Theory which studies the learning model of players, has attracted more attention than before. These Games can simulate the real situation and dynamic during processing time. This paper creates the Evolutionary Markov Games, which maps players’ strategy-choosing to a Markov Decision Processes (MDPs) with payoffs. Boltzmann distribution is used for transition probability and the General Regression Neural Network (GRNN) simulating the strategy-choosing in Evolutionary Markov Games. Prisoner’s dilemma is a problem that uses the method and output results showing the overlapping the human strategy-choosing line and GRNN strategy-choosing line after 48 iterations, and they choose the same strategies. Also, the error rate of the GRNN training by Tit for Tat (TFT) strategy is lower than similar work and shows a better result.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75722721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-11DOI: 10.12962/j20882033.v32i1.8628
Garry Raditya Putra, D. Rosyid, R. Prastianto
Floating Storage and Offloading (FSO) demands good designs. One of the design is FSO’s mooring lines. The mooring lines of the FSO would face various environmental conditions, so that they are required to have good reliability. FSO Abherka, installed in the Madura stratit, has dimensions of LOA 242.90 m, LPP 232 m, Breadth 41.6 m, Height 19.7 m, Draft 12,894 m, and a deadweight of 85829 tons. The strait has a water depth of 100 m with contour variations of ± 2 m. Each four cluster of mooring lines of FSO Abherka has three mooring ropes. This study analyzed the strength of mooring lines in intact and damaged conditions using DNV software Genie and DNV HydroD. This study models a hydrodynamic FSO. This study also measured the reliability of the mooring lines from 2 cases: 1 intact and one damage from the most dangerous conditions. This study used the mean Value First Order Second Moment method to find the reliability of these mooring lines. Based on the reliability calculation set by DNV according to DNV-OS E301, the mooring lines design meet the established reliability criteria.
浮动存储和卸载(FSO)要求良好的设计。其中一个设计是FSO的系泊线。FSO的系泊线将面临各种环境条件，因此要求其具有良好的可靠性。FSO Abherka安装在Madura地层中，LOA尺寸242.90 m, LPP 232 m，宽度41.6 m，高度19.7 m，吃水12894 m，自重85829吨。海峡水深100米，等值线变化±2米。FSO Abherka每4组系泊线有3根系泊绳。本研究使用DNV软件Genie和DNV HydroD分析了完好和受损情况下系泊索的强度。本研究建立了一个水动力FSO模型。本研究还从两种情况下测量了系泊线的可靠性:一种是完好无损的，另一种是最危险情况下的损坏。本研究采用均值一阶二阶矩法求解这些系泊索的可靠度。根据DNV- os E301规定的可靠性计算，锚泊线设计满足既定的可靠性标准。
{"title":"Mooring Lines Reliability Analysis Case Study: Fso Abherka,","authors":"Garry Raditya Putra, D. Rosyid, R. Prastianto","doi":"10.12962/j20882033.v32i1.8628","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.8628","url":null,"abstract":"Floating Storage and Offloading (FSO) demands good designs. One of the design is FSO’s mooring lines. The mooring lines of the FSO would face various environmental conditions, so that they are required to have good reliability. FSO Abherka, installed in the Madura stratit, has dimensions of LOA 242.90 m, LPP 232 m, Breadth 41.6 m, Height 19.7 m, Draft 12,894 m, and a deadweight of 85829 tons. The strait has a water depth of 100 m with contour variations of ± 2 m. Each four cluster of mooring lines of FSO Abherka has three mooring ropes. This study analyzed the strength of mooring lines in intact and damaged conditions using DNV software Genie and DNV HydroD. This study models a hydrodynamic FSO. This study also measured the reliability of the mooring lines from 2 cases: 1 intact and one damage from the most dangerous conditions. This study used the mean Value First Order Second Moment method to find the reliability of these mooring lines. Based on the reliability calculation set by DNV according to DNV-OS E301, the mooring lines design meet the established reliability criteria.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73334936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-11DOI: 10.12962/j20882033.v32i1.8678
Ebenezer Nartey, Emmanuel Tei-Mensah, S. Adusei, Doreen Asante, Charity Abaati
Hot pepper sauce is a frequently used product in most Ghanaian homes, schools, and restaurants, which occasionally serves as condiments. The cooking period during the production process of hot pepper sauce results in physicochemical changes, which affect the quality and safety of the sauce. The study seeks to determine the effect of the application of different cooking times on the physicochemical properties and microbial safety of hot pepper sauce. The cooking periods were 10 minutes, 20 minutes, 30 minutes, and 1 hour for samples A, B, C, and D. Standard physicochemical and microbiological techniques were employed in the various analysis. Sample D (1 hour cooked) recorded the least moisture and ash content, acid insoluble ash, and a statistically significant acid value (P<0.5) to the other samples (A, B, and C). The total viable count assay indicated the presence of anaerobic microorganisms in all the samples assessed, with sample D exhibiting very few microbial populations compared to the others. Staphylococcus species were detected in sample A and B only but undetected in samples C and D. Also, total coliform and Clostridium perfringens were unobserved in any of the samples. Generally, sample D had the best overall acceptability rate, with sample A having the least. This study, therefore, sup-ports the patronization of the hour-cooked hot pepper sauce (sample D) with greater quality, longer shelf-life, and safety.
{"title":"Effect Of The Application Of\u0000Different Cooking Periods On The Physicochemical Properties And Microbial Safety Of Hot Pepper Sauce","authors":"Ebenezer Nartey, Emmanuel Tei-Mensah, S. Adusei, Doreen Asante, Charity Abaati","doi":"10.12962/j20882033.v32i1.8678","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.8678","url":null,"abstract":"Hot pepper sauce is a frequently used product in most Ghanaian homes, schools, and restaurants, which occasionally serves as condiments. The cooking period during the production process of hot pepper sauce results in physicochemical changes, which affect the quality and safety of the sauce. The study seeks to determine the effect of the application of different cooking times on the physicochemical properties and microbial safety of hot pepper sauce. The cooking periods were 10 minutes, 20 minutes, 30 minutes, and 1 hour for samples A, B, C, and D. Standard physicochemical and microbiological techniques were employed in the various analysis. Sample D (1 hour cooked) recorded the least moisture and ash content, acid insoluble ash, and a statistically significant acid value (P<0.5) to the other samples (A, B, and C). The total viable count assay indicated the presence of anaerobic microorganisms in all the samples assessed, with sample D exhibiting very few microbial populations compared to the others. Staphylococcus species were detected in sample A and B only but undetected in samples C and D. Also, total coliform and Clostridium perfringens were unobserved in any of the samples. Generally, sample D had the best overall acceptability rate, with sample A having the least. This study, therefore, sup-ports the patronization of the hour-cooked hot pepper sauce (sample D) with greater quality, longer shelf-life, and safety.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81061307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-26DOI: 10.12962/j20882033.v32i1.7003
Sangsaka Wira Utama, N. Fadhilah, M. Haekal, R. Zakaria, R. Hidayat, D. Risanti
It is known that plasmonic nanoparticles in dye-sensitized solar cells (DSSC) could enhance efficiency through improvement in light absorbance and electron dynamics. Herein we investigated various sizes of AuNP through spontaneous Al(NO 3 ) 3 addition. Core-Shell Au@TiO 2 was prepared with various Al(NO 3 ) 3 concentrations of 0.25 mM, 0.5 mM, 0.75 mM and 1 mM. The Au@TiO 2 volume fraction of 1% was further added to TiO 2 photoanode. Based on the particle size analyzer (PSA) char-acteristics, the synthesized AuNP’s size was within a range of 34.62 nm – 139.5 nm. The highest efficiency of DSSC was obtained for the sample with the largest AuNP ’s diameter, i.e., 0.0313%, which is about three times higher than pristine DSSC. The increase in efficiency was in accord with Metallic Nanoparticle Boundary Element Method (MNPBEM) simulation, UV-vis spectroscopy, and Incident Photon to Current Conversion Efficiency (IPCE) analysis largest Au core diameter contributes to the strong absorbance and hence the short circuit current.
{"title":"Controllable Core Size of Au@TiO2 through Al(NO3)3 Addition and Its Effects on DSSC Performance","authors":"Sangsaka Wira Utama, N. Fadhilah, M. Haekal, R. Zakaria, R. Hidayat, D. Risanti","doi":"10.12962/j20882033.v32i1.7003","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.7003","url":null,"abstract":"It is known that plasmonic nanoparticles in dye-sensitized solar cells (DSSC) could enhance efficiency through improvement in light absorbance and electron dynamics. Herein we investigated various sizes of AuNP through spontaneous Al(NO 3 ) 3 addition. Core-Shell Au@TiO 2 was prepared with various Al(NO 3 ) 3 concentrations of 0.25 mM, 0.5 mM, 0.75 mM and 1 mM. The Au@TiO 2 volume fraction of 1% was further added to TiO 2 photoanode. Based on the particle size analyzer (PSA) char-acteristics, the synthesized AuNP’s size was within a range of 34.62 nm – 139.5 nm. The highest efficiency of DSSC was obtained for the sample with the largest AuNP ’s diameter, i.e., 0.0313%, which is about three times higher than pristine DSSC. The increase in efficiency was in accord with Metallic Nanoparticle Boundary Element Method (MNPBEM) simulation, UV-vis spectroscopy, and Incident Photon to Current Conversion Efficiency (IPCE) analysis largest Au core diameter contributes to the strong absorbance and hence the short circuit current.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91328359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-26DOI: 10.12962/j20882033.v32i1.7227
Shirin Kordnoori, Mahboobe Sadat Kobari, H. Mostafaei
The current coronavirus disease 2019 (COVID-19) outbreak has recently been declared a pandemic and spread over 200 countries and territories. Forecasting the long-term trend of the COVID-19 epidemic can help health authorities determine the transmission characteristics of the virus and take appropriate prevention and control strategies beforehand. Previous studies that solely applied traditional epidemic models or machine learning models were subject to underfitting or overfitting problems. This paper designed a predictive model based on the mathematical model Susceptible-Exposed-Infective-Recovered (SEIR). SEIR is represented by a set of differential-algebraic equations incorporated with machine learning techniques to fit the data reported to estimate the spread of the COVID-19 epidemic in long-term in the Islamic Republic of Iran up to the end of July 0f 2020. This paper reduced R0 after a certain amount of days to account for containment measures and used delays to allow for lagging official data. Two evaluation criteria, R2 and RMSE, had used in this research which estimates the model on officially reported confirmed cases from different regions in Iran. The results proved the model's effectiveness in simulating and predicting the trend of the COVID-19 outbreak. Results showed the integrated approach of epidemic and machine learning models could accurately forecast the long-term trend of the COVID-19 outbreak.
{"title":"Predict The Spread of COVID-19 in Iran with A SEIR Model","authors":"Shirin Kordnoori, Mahboobe Sadat Kobari, H. Mostafaei","doi":"10.12962/j20882033.v32i1.7227","DOIUrl":"https://doi.org/10.12962/j20882033.v32i1.7227","url":null,"abstract":"The current coronavirus disease 2019 (COVID-19) outbreak has recently been declared a pandemic and spread over 200 countries and territories. Forecasting the long-term trend of the COVID-19 epidemic can help health authorities determine the transmission characteristics of the virus and take appropriate prevention and control strategies beforehand. Previous studies that solely applied traditional epidemic models or machine learning models were subject to underfitting or overfitting problems. This paper designed a predictive model based on the mathematical model Susceptible-Exposed-Infective-Recovered (SEIR). SEIR is represented by a set of differential-algebraic equations incorporated with machine learning techniques to fit the data reported to estimate the spread of the COVID-19 epidemic in long-term in the Islamic Republic of Iran up to the end of July 0f 2020. This paper reduced R0 after a certain amount of days to account for containment measures and used delays to allow for lagging official data. Two evaluation criteria, R2 and RMSE, had used in this research which estimates the model on officially reported confirmed cases from different regions in Iran. The results proved the model's effectiveness in simulating and predicting the trend of the COVID-19 outbreak. Results showed the integrated approach of epidemic and machine learning models could accurately forecast the long-term trend of the COVID-19 outbreak.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86304792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-28DOI: 10.12962/J20882033.V31I3.7385
B. Piscesa, H. Alrasyid, D. Prasetya, D. Iranata
This paper investigates the possibility of using multi-surface plasticity model to predict shear failure in reinforced concrete beams. The analysis is carried out using the inhouse software called 3D-NLFEA. The constitutive model for the concrete material is based on the plasticity-fracture model which had previously developed to simulate the behavior of concrete cover spalling in reinforced concrete columns. To obtained the asymmetric shear failure pattern, random material properties imperfection for each of the meshed element is used. Two beams available in the literature are investigated and compared with the analysis results using 3D-NLFEA. From the comparisons, excellent agreement between the analysis and the test result were obtained. 3D-NLFEA can predict the peak load accurately. The peak load prediction only varies 2.19% for beam OA1 and 3.28 % for beam OA2 and it were lower than the test results. The failure crack patterns also shows a typical diagonal crack extension from the support to the loading steel plate.
{"title":"Numerical Investigation of Reinforced Concrete Beam Due to Shear Failure","authors":"B. Piscesa, H. Alrasyid, D. Prasetya, D. Iranata","doi":"10.12962/J20882033.V31I3.7385","DOIUrl":"https://doi.org/10.12962/J20882033.V31I3.7385","url":null,"abstract":"This paper investigates the possibility of using multi-surface plasticity model to predict shear failure in reinforced concrete beams. The analysis is carried out using the inhouse software called 3D-NLFEA. The constitutive model for the concrete material is based on the plasticity-fracture model which had previously developed to simulate the behavior of concrete cover spalling in reinforced concrete columns. To obtained the asymmetric shear failure pattern, random material properties imperfection for each of the meshed element is used. Two beams available in the literature are investigated and compared with the analysis results using 3D-NLFEA. From the comparisons, excellent agreement between the analysis and the test result were obtained. 3D-NLFEA can predict the peak load accurately. The peak load prediction only varies 2.19% for beam OA1 and 3.28 % for beam OA2 and it were lower than the test results. The failure crack patterns also shows a typical diagonal crack extension from the support to the loading steel plate.","PeriodicalId":14549,"journal":{"name":"IPTEK: The Journal for Technology and Science","volume":"142 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77806342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-28DOI: 10.12962/J20882033.V31I3.6260
Risa Perdana Sujanawati, Mahendrawathi Er, Radityo Prasetianto Wibowo
Business Process Management (BPM) is a collection of methods, techniques, and tools to optimize organizational performance. In the case of higher education institutions (HEIs), BPM is usually implemented to provide a standard business process. Implementation of Data Governance (DG) is often based on the desire for good Data Quality (DQ), to help an organization carry out its strategies and achieve its objectives. Previous research has proven that DG would improve data quality and safety and trigger a better standard. While data and information are essentially connected, BPM and DG have been addressed separately in the process of obtaining high quality data and information. This study conducts a literature review to investigate the relationship of BPM in the development of DG in HEIs. Articles related to BPM, DG, and DQ are collected from relevant databases. The articles are filtered and perused further to obtain 23 articles that are analyzed and synthesized to answer the research question. Based on these articles, a conceptual model is developed, depicting relationship in the application of BPM and DG. The first relationship identified from previous work is that the successful implementation of BPM influences DG planning and implementation success. Second, a good BPM implementation influences the process of obtaining a good DQ. Finally, implementing a good DG influences the acquirement of a good DQ. This study also found that BPM, DG, and DQ implementation at HEIs was fewer than that at other sectors or case studies, which open up opportunities for further studies.
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