PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)最新文献

{"title":"Synthesis of PVA/starch bioplastic crosslinked with glutaraldehyde and reinforced by cellulose palmitate","authors":"N. B. Putri, N. M. Nizardo, E. Saepudin","doi":"10.1063/5.0059785","DOIUrl":"https://doi.org/10.1063/5.0059785","url":null,"abstract":"Five variations of starch-based bioplastics have been prepared to see the improvement of starch/PVA-based bioplastic characteristics. They are pure PVA, PVA/starch composite, PVA/starch crosslinked with glutaraldehyde, crosslinked PVA/starch and cellulose added, and crosslinked PVA/starch and cellulose palmitate added. Among the five variations, the PVA bioplastic film showed the closest transparency value to conventional plastics but also has the highest degree of swelling and solubility, and the crosslinked PVA/starch showed the least transparency value. The crosslinked PVA/starch with cellulose palmitate as a filler had the lowest DS and solubility. Tensile strength test results proved that the crosslinked PVA/starch and reinforced by cellulose palmitate graft polymer had the highest tensile strength and confirmed as the best result among five bioplastic modifications.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79103448","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}

{"title":"High magnesium substitution effect on the structural properties of LaFe1-xMgxO3 (x = 0.4 and 0.5) perovskite material","authors":"Y. Yunita, U. Hanifah, D. Triyono","doi":"10.1063/5.0058840","DOIUrl":"https://doi.org/10.1063/5.0058840","url":null,"abstract":"Perovskite-type oxide lanthanum orthoferrite (LaFeO3) is the newest type of candidate for electrode material because of its high electrochemical capacity and good activation property. Doping with Magnesium of LaFeO3 changes the structural properties. Material LaFe1-xMgxO3 (x = 0.4 and 0.5) synthesized using the sol-gel method. The structural properties of the materials were determined using XRD and Fourier transform infrared spectroscopy. Eg was measured using UV-VIS. The elemental composition was identified by X-Ray Fluorescence (XRF). The orthorhombic crystal structure with space group Pbnm in the sample is characterized by XRD. A second phase was identified as La2O3. XRF spectra confirmed the presence of Lanthanum, Magnesium, and Ferrum in the ratio of each element were agree with the calculation. The vibrational modes (bending and symmetric stretching) of the Fe / MgO6 octahedra were observed by FTIR spectrum. Ultraviolet-Visible spectrophotometer analysis indicated a decreasing energy gap with Mg content.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82918470","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}

{"title":"Analysis of the quality of mathematical examination items for high school ‘A’ in Bekasi","authors":"Y. F. Siregar, R. Setiadi","doi":"10.1063/5.0061171","DOIUrl":"https://doi.org/10.1063/5.0061171","url":null,"abstract":"The parameters of educational success can be measured by conducting an educational assessment in the form of an evaluation. In the process of evaluation, especially learning outcomes evaluation, teachers generally use the examination system. The purposes of this research are to analyze the quality of Mathematics exam questions made by teachers and predict the Mathematics ability of ‘A’ High School students in Bekasi. The data used are the exam questions, the answer of exam questions and students’ answers to the Mathematics final exam with 148 subjects of Grade 10 students of ‘A’ High School in Bekasi. The method used to achieve these purposes is Item Response Theory with 4 parameters. The result of this study obtained show that from 30 exam questions made by the school, there are 19 items with good quality to measure the ability of students. The result of the analysis based on all items, it was found that from 148 students who took the Mathematics Examination at the ‘A’ High School in Bekasi, there are 25 students with low level of ability, 97 students with medium level of ability, and 26 students with high level of ability. The result of the analysis based on good quality items, it was found that from 148 students who took the Mathematics Examination at the ‘A’ High School in Bekasi, there are 21 students with low level of ability, 103 students with medium level of ability, and 24 students with high level of ability.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74600702","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}

{"title":"Range finding test of crude oil on Bacillus subtilis and Pseudomonas putida","authors":"W. Wardhani, H. S. Titah, H. Pratikno, I. Purwanti","doi":"10.1063/5.0058775","DOIUrl":"https://doi.org/10.1063/5.0058775","url":null,"abstract":"Crude oil spills are not unfamiliar when it comes to petroleum mining. Crude oil degradation in nature can be conducted using the help from microorganisms. Bacillus subtilis and Pseudomonas putida have been proven to have the ability to degrade crude oil hydrocarbons. Each bacterium has different resistance level for different kind of pollutant and concentration. Range finding test was used to determine the range of concentrations for a specific compound in toxicity test. The objective of this study was to determine whether B. subtilis and P. putida can live on various crude oil concentrations (0 %, 5 %, 10 % and 15 % (v/v)) using nutrient agar medium. The maximum concentration was 15 % (v/v) for crude oil using bioremediation treatment. The bacteria were obtained from a pure culture at ITS environmental remediation laboratory and the crude oil was obtained from one of PT. Pertamina oil refineries. The bacteria were incubated at 37 °C and were screened using comparison between 0 % and the other variations each day for 7 days. The result of the range finding test showed that both the bacteria can live at various concentrations, even 15 % (v/v). It was shown that both of them potentially have a capability to be used to degrade a considered heavily crude oil polluted area.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86239639","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}

{"title":"Diagnostic reference level (DRL) analysis of CT scan modality for head procedure on pediatric patient","authors":"I. B. G. P. Pratama, I. R. Mulia","doi":"10.1063/5.0058881","DOIUrl":"https://doi.org/10.1063/5.0058881","url":null,"abstract":"Diagnostic Reference Level (DRL) is an effective tool recommended by the International Atomic Energy Agency (IAEA) to improve medical exposure optimization, especially for Diagnostic and Interventional Radiology. In Indonesia, the establishment of DRL for pediatric patients has not done yet. This study aims to analyze the DRL for CT Scan modality on the head procedure for pediatric patients. Pediatric patient dose data were collected from hospitals that reported the data into a web-based application called Patient Dose Data Information System (Si-INTAN). Analysis of DRL was based on 75 percentile (Q3) analysis of patient dose distribution in certain age groups. Q3 analysis was done as a separator between acceptable dose and exceeds doses. The exceed doses need to be evaluated. The analysis was done for the volume-Computed Tomography Dose Index (CTDIvol) and Dose-Length Product (DLP). The result showed a correlation between patient age and CTDIvol value based on experience in Indonesia. However, for DLP quantity, the correlation between patient age and DLP can only be seen if DRL of < 1 year is excluded. The results of comparisons with DRL in adult patients indicated that DRL in 9–14 age group patients is quite high for the CTDIvol quantity (65 mGy and 65.1 mGy, respectively). DLP quantity comparison for < 1 and 9–14 age group are higher than adult patient (1468 mGy.cm, 1519 mGy.cm and 1400 mGy.cm respectively). Evaluation of examination procedure needs to be done to improve the optimization in medical exposure for the pediatric patient, and the pediatric DRL can be lower than DRL for the adult patient.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"120 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87709262","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}

{"title":"The s-curve model of biodiesel transesterification by numerical methods based on brief experimental data","authors":"M. Sofyan, M. E. Hafizah, A. Manaf","doi":"10.1063/5.0061169","DOIUrl":"https://doi.org/10.1063/5.0061169","url":null,"abstract":"An experiment related to biodiesel transesterification was successfully done. The chemical reaction of transesterification was conducted at 65 °C during 14 h of reaction time involving the ratio of methanol and used cooking oil was 70 : 1. An additional catalyst is required upon 10 % of HPA (Heteropoly Acid) as an organic catalyst. The maximum conversion (yield) was achieved by 88.68 % with activation energy (Ea) was 53.99 kJ/mole with Pre-Exponential Factor (A) was obtained 2.9 x 107. Based on those experiments, s-curve modeling was designed. The s-curve was generated through three different selected temperature reactions as follows: 60, 65, and 70 °C (333, 338, and 343 K) with various reaction times 0.5, 1.0, and 2 h respectively. The mechanism to build the s-curve model through three stages starting by determination of reaction rate constant (k’) through linear regression equation continued with the curve formation between ln k’ with 1/T to produce a value of Ea and A. To produce the s-curve model was observed through numerical processes, interpreted and analyzed by applying the Avrami equation to determine reaction and temperature time is required by trans esterification reaction between methanol and used cooking oil. Referring to the curve was obtained several results which are the optimum temperature to obtain the best yield, time to obtain a 100 % yield, and time to obtain a determining yield. According to the s-curve model was formed, the time reaction 46.95 h and 22.79 h is able to achieve 100 % and 96.5 % of yield product by plotting reaction of temperature and time. This simulation can be applied to other biodiesel reaction which has different raw materials and types of a catalyst by keeping the same method to be applied through the transesterification method.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90699812","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}

{"title":"The SOCA type of eye lens dosimeter testing to measure Hp(3) dose","authors":"A. T. Desviana, F. Adhisti, B. Bunawas","doi":"10.1063/5.0061158","DOIUrl":"https://doi.org/10.1063/5.0061158","url":null,"abstract":"Interventional cardiology and radiology workers are exposed with occupational radiation. Radiation workers must use not only personal dosimeter; but also eye lens dosimeter in order to maintain the dose that does not exceed the dose limit value set by Nuclear Energy Regulatory Agency (Bapeten) which is 20 mSv a year with no single year exceeding 50 mSv. In order to provide a reliable with affordable price dosimeter, a new eye lens dosimeter was developed at NuklindoLab using TLD-900 (CaSO4:Dy) disc for measurement of dose in term of Hp(3). The type testing including homogeneity test, linearity of dose response, angular dependence test, and determining detection threshold were done after the irradiation carried out in Secondary Standard Dosimetry Laboratory (SSDL) Agensi Nuklear Malaysia. The method of the irradiation was based on ISO 4037-3 and the reference of the type testing was based on ISO 12794. The coefficient of variance (CV) value from homogeneity test results 4.8%, the linearity test result R2 values vary from 0.998 to 0.999, the angular dependence result ranges from 0% to 19% with average value 12.9%, and the detection threshold of SOCA dosimeter value was 0.35 mSv.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88370841","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}

{"title":"Study of site evaluation in nuclear ore mining","authors":"L. Pandi, N. Siwhan","doi":"10.1063/5.0058873","DOIUrl":"https://doi.org/10.1063/5.0058873","url":null,"abstract":"Mining activity is the process to extract materials/minerals from the earth. Before performing mining activity, it is necessary to evaluate the preparation of the mining site. In Indonesia, regulation related to mining activity is available for mineral and coal mining. This regulation does not regulate the mining of nuclear ore/radioactive mineral. Nuclear ore is a raw material used for producing nuclear fuel, including associated mineral contained radioactive material. A regulation related to nuclear ore mining must be developed. This paper studies the aspects of the preparation of nuclear ore mining sites using descriptive, analytical, and qualitative methods supplemented with literature studies. This study is to discuss several aspects of the evaluation and the objectives of the evaluation aspects such as seismological, meteorological, and hydrological aspects. Therefore, it is necessary to harmonize with regulations related the mineral and coal mining. The safety and security regulation for sitting of nuclear ore mining is not regulated yet in mineral and coal mining regulation.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89421064","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}

{"title":"THD-Tricluster method on gene expression data of multiple sclerosis patients receiving interferon-beta therapy","authors":"A. Rachma, S. Soemartojo, T. Siswantining","doi":"10.1063/5.0058711","DOIUrl":"https://doi.org/10.1063/5.0058711","url":null,"abstract":"THD-Tricluster method is a triclustering analysis with a biclustering-based approach. The THD-Tricluster method uses the Shifting-and-Scaling Similarity (SSSim) value to form a bicluster first and shows it by forming a tricluster. The SSSim value uses Shifting-and-Scaling Correlation to use an interface with shifting and scaling patterns as well as intertemporal coherence and compares it with the threshold value. THD-Tricluster method was performed on treatment response data to interferon-beta therapy in multiple sclerosis patients. The optimal scenario is a scenario with a coverage value scenario that uses the highest threshold value. In this scenario, there are two types of tricluster, namely the tricluster which has a collection of genes in responsive patients and patients who are not responsive to therapy. The differences collection of genes in both tricluster can be used by medical professionals in the development of interferon-beta therapy treatments to create a therapy response on multiple sclerosis disease.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76033712","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}

{"title":"Temperature and level control in a water thermal mixing process by using neural network controller","authors":"M. S. Ridho, P. Prajitno","doi":"10.1063/5.0059112","DOIUrl":"https://doi.org/10.1063/5.0059112","url":null,"abstract":"In the industrial world, mixing operations are very widely used to process raw materials into products such as petroleum, chemicals, and various other types, so increasing the effectiveness of mixing operations is necessary. Usually, in industrial-scale plants, the conventional PID controller is used in the main controllers that are relied upon, but they often underperform, especially when dealing with non-linear systems. In this research, a neural network (NN)-based controller is proposed to overcome that problem. The plant model used for the simulation in this research is a mixing water plant, where the temperature and water level in the mixture tank will be controlled. This plant consists of 2 water flow inputs, namely cold water and hot water, which flows into the mixed tank where the temperature and water level of the mixture will be maintained and controlled according to the desired set points by regulating the flow of cold water and hot water. There are two types of NN-based controllers in this simulation study. The first is NN-based controller which has inputs in the form of the set point (SP), the current step (n) process variable (PV), and the previous step (n-1) process variable, while the second is a NN-based controller with set point (SP), error, and change of error for the inputs. Both of these NN-based controllers were developed using feed-forward neural networks, and the simulation was conducted by using MATLAB/SIMULINK. The simulation results show that the proposed NN-based controllers provide better performances when compared to conventional PID controllers. The best performance is obtained using the NN-based controller that has inputs in the form of set point, error, and change of error, with settling time of 472.7 s and rise time of 242.0 s in controlling the temperature, and settling time of 984.4 s, rise time about 447.6 s in controlling the level, that is faster than the PID controller which has 613.7 s and 393.9 s for settling time and rise time respectively in controlling the temperature, while gives settling time of 3216 s and rise time 412.8 s in controlling the level. Moreover, the NN-based controller produces a system response that has no overshoot at all.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77001128","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}