Homopolymer hydrogel polyacrylamide and poly (N-methylol acrylamide) also Interpenetrating Polymer Network (IPN) hydrogel polyacrylamide–poly (N-methylol acrylamide) were synthesized using free radical polymerization. Various concentrations of N, N’- methylene bis acrylamide (MBA) as crosslinkers were used to determine their effect on swelling in various pH. Variation of crosslinker concentrations caused changes in the hydrogel structures and thus affected the swelling ratio. The polymerizations were conducted successfully, which was proven by the loss of the C=C and C-H sp2 alkene peaks on FTIR spectra. Morphology characterization with SEM was observed on IPN PNMA hydrogel and it was found that it had pore size in the range of 400–700 nm. Swelling test was carried out at room temperature and pH 3, 5, 7, 9, and 12. Swelling ratios of IPN hydrogels were found to be higher than homopolymer hydrogel because the presence of the second network. The highest swelling ratio in different pH for PNMA and IPN hydrogels was found at pH 5.
{"title":"The effect of crosslinker concentration on swelling behavior of pH-responsive IPN hydrogels based on poly(hydroxymethyl acrylamide)","authors":"R. R. Mashudi, N. M. Nizardo","doi":"10.1063/5.0058723","DOIUrl":"https://doi.org/10.1063/5.0058723","url":null,"abstract":"Homopolymer hydrogel polyacrylamide and poly (N-methylol acrylamide) also Interpenetrating Polymer Network (IPN) hydrogel polyacrylamide–poly (N-methylol acrylamide) were synthesized using free radical polymerization. Various concentrations of N, N’- methylene bis acrylamide (MBA) as crosslinkers were used to determine their effect on swelling in various pH. Variation of crosslinker concentrations caused changes in the hydrogel structures and thus affected the swelling ratio. The polymerizations were conducted successfully, which was proven by the loss of the C=C and C-H sp2 alkene peaks on FTIR spectra. Morphology characterization with SEM was observed on IPN PNMA hydrogel and it was found that it had pore size in the range of 400–700 nm. Swelling test was carried out at room temperature and pH 3, 5, 7, 9, and 12. Swelling ratios of IPN hydrogels were found to be higher than homopolymer hydrogel because the presence of the second network. The highest swelling ratio in different pH for PNMA and IPN hydrogels was found at pH 5.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84926249","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}
Indonesia has the challenge in preparing Infrastructure Detection On the State Border of the nuclear material and radioactive out of regulatory control, located in the Asia Pacific region (Southeast Asia) bordered by ten neighboring countries and strategically located between the Pacific Ocean and the Indian Ocean, causing a potential threat of entry of radioactive materials and nuclear materials out of regulatory control that could threaten the stability of national security. Therefore, preliminary studies were conducted in order to formulate solutions ranging from the strengthening of the regulation, the application of the concept of operations from planning, implementation and evaluation and strengthening of institutional coordination involved in border states.
{"title":"Preliminary study of Indonesian infrastructure detection of the nuclear material and other radioactive out of regulatory control at the state border","authors":"D. Cahyadi, A. Y. Pristiyanto","doi":"10.1063/5.0058871","DOIUrl":"https://doi.org/10.1063/5.0058871","url":null,"abstract":"Indonesia has the challenge in preparing Infrastructure Detection On the State Border of the nuclear material and radioactive out of regulatory control, located in the Asia Pacific region (Southeast Asia) bordered by ten neighboring countries and strategically located between the Pacific Ocean and the Indian Ocean, causing a potential threat of entry of radioactive materials and nuclear materials out of regulatory control that could threaten the stability of national security. Therefore, preliminary studies were conducted in order to formulate solutions ranging from the strengthening of the regulation, the application of the concept of operations from planning, implementation and evaluation and strengthening of institutional coordination involved in border states.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91505021","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}
Recently Molten Salt Reactor (MSR) gains more interest among nuclear researchers due to its promising competitiveness and safety features. ThorCon MSR (TMSR500) is this kind of reactor projected to be built in Indonesia. Due to a limited number of proven operating reactors and limited knowledge of reactor characteristics, several aspects have to be studied, such as neutronic features, material, fuel circulation, fuel management, etc. This paper reveals some important neutronic safety features of MSR, referring to ThorCon design, such as temperature reactivity feedback of fuel, moderator, and reflector. Void reactivity feedback and neutron energy spectrum behavior during voiding were also examined by performing MCNP6 calculations and nuclear data ENDF/B-VII. Full core geometry was modeled, and the drift effect was not taken into account. Neutron flux and power density distribution were also addressed. The purpose of this paper is to review the aforementioned important safety parameters by doing the Monte Carlo code calculations. The results indicated that the core induces negative reactivity feedback due to temperature increase in fuel and moderator, but positive for temperature increase in the reflector. The temperature reactivity coefficient of fuel, moderator, and reflector exhibited −5.82×10−3 (%dk/k)/°C, −9.68×10−4 (%dk/k)/°C, and +1.84×10−4 (%dk/k)/°C, respectively. The introduction of void in the core either as a result of boiling or pump cavitation would induce positive reactivity of +0.115 (%dk/k)/(%void). Overall, the temperature reactivity coefficients exhibited large negative, and there is a comfortable margin between the operating temperature to the boiling point that might prevent void generation due to fuel boiling.
{"title":"The neutronic characteristics of thermal molten salt reactor","authors":"A. Khakim, F. Rhoma, A. Waluyo, S. Suharyana","doi":"10.1063/5.0058949","DOIUrl":"https://doi.org/10.1063/5.0058949","url":null,"abstract":"Recently Molten Salt Reactor (MSR) gains more interest among nuclear researchers due to its promising competitiveness and safety features. ThorCon MSR (TMSR500) is this kind of reactor projected to be built in Indonesia. Due to a limited number of proven operating reactors and limited knowledge of reactor characteristics, several aspects have to be studied, such as neutronic features, material, fuel circulation, fuel management, etc. This paper reveals some important neutronic safety features of MSR, referring to ThorCon design, such as temperature reactivity feedback of fuel, moderator, and reflector. Void reactivity feedback and neutron energy spectrum behavior during voiding were also examined by performing MCNP6 calculations and nuclear data ENDF/B-VII. Full core geometry was modeled, and the drift effect was not taken into account. Neutron flux and power density distribution were also addressed. The purpose of this paper is to review the aforementioned important safety parameters by doing the Monte Carlo code calculations. The results indicated that the core induces negative reactivity feedback due to temperature increase in fuel and moderator, but positive for temperature increase in the reflector. The temperature reactivity coefficient of fuel, moderator, and reflector exhibited −5.82×10−3 (%dk/k)/°C, −9.68×10−4 (%dk/k)/°C, and +1.84×10−4 (%dk/k)/°C, respectively. The introduction of void in the core either as a result of boiling or pump cavitation would induce positive reactivity of +0.115 (%dk/k)/(%void). Overall, the temperature reactivity coefficients exhibited large negative, and there is a comfortable margin between the operating temperature to the boiling point that might prevent void generation due to fuel boiling.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89820032","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}
We study thermodynamic properties of static spherically-symmetric and electrically-charged black hole in Eddington-inspired Born-Infeld (EiBi) Theory. We consider Maxwell electrodynamics with power law for the matter fields. Corrected black hole entropy is needed when we evaluate in EiBI theory of gravity [1] and we can derived the black hole mass. Specific heat CQ is derive√d from entropy and Hawking temperature. Results show that mostly of the black holes exist except when q=18(−3−41), κ = 1 and Q = 0.1. Black holes are unstable at first for a few values of Q, but CQ increases exponentially afterwards and becomes positive.
{"title":"Study of thermodynamic properties for charged power law black holes in Eddington-inspired Born-Infeld theory","authors":"F. S. Hariono, B. N. Jayawiguna, H. S. Ramadhan","doi":"10.1063/5.0061178","DOIUrl":"https://doi.org/10.1063/5.0061178","url":null,"abstract":"We study thermodynamic properties of static spherically-symmetric and electrically-charged black hole in Eddington-inspired Born-Infeld (EiBi) Theory. We consider Maxwell electrodynamics with power law for the matter fields. Corrected black hole entropy is needed when we evaluate in EiBI theory of gravity [1] and we can derived the black hole mass. Specific heat CQ is derive√d from entropy and Hawking temperature. Results show that mostly of the black holes exist except when q=18(−3−41), κ = 1 and Q = 0.1. Black holes are unstable at first for a few values of Q, but CQ increases exponentially afterwards and becomes positive.","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":"85540601","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}
Ocean acidification is one of the phenomena caused by climate change in the world. Most Ocean acidification (OA) experimental is carried out in a laboratory by creating a simple system. In this research, the seawater in tank is given CO2 gas regulated using a needle valve driven by stepper motors using Proportional-Integral-Derivative (PID) controller. This tank is equipped with a stirrer to accelerate the system’s homogeneity, flow sensor, and pH sensor. Arduino as a system control is tasked to regulate stepper motors, reading and keeping the pH value according to the set point value while recording the changes of pH value occurring in the tank. This research shows that the system can reach a desired set point and maintain it with 1.7 % overshoot. From the experimental results, OA system has a good response with a final pH value of 7±0.09 that can also be concluded this system is very suitable for long-term research.
{"title":"Desain for ocean acidification experiment related to radioecology in Indonesia","authors":"Y. Priasetyono, H. Suseno, P. Prajitno","doi":"10.1063/5.0061427","DOIUrl":"https://doi.org/10.1063/5.0061427","url":null,"abstract":"Ocean acidification is one of the phenomena caused by climate change in the world. Most Ocean acidification (OA) experimental is carried out in a laboratory by creating a simple system. In this research, the seawater in tank is given CO2 gas regulated using a needle valve driven by stepper motors using Proportional-Integral-Derivative (PID) controller. This tank is equipped with a stirrer to accelerate the system’s homogeneity, flow sensor, and pH sensor. Arduino as a system control is tasked to regulate stepper motors, reading and keeping the pH value according to the set point value while recording the changes of pH value occurring in the tank. This research shows that the system can reach a desired set point and maintain it with 1.7 % overshoot. From the experimental results, OA system has a good response with a final pH value of 7±0.09 that can also be concluded this system is very suitable for long-term research.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74215128","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}
This paper discusses stereoscopic images gain using library in OpenCV on Python platform. The simple stereo camera system that can provide stereoscopic images in both as a picture (PNG) or as a video (AVI) is developed. The system comprises a stereo camera, a USB connector, a tripod, and a notebook with programming language of Python 3.7, along with the free library of OpenCV 4.0 installed inside the notebook. The system has successfully provided both images and videos. However, the spatial resolution and the frame rate depend to the specifications of the stereo camera being used. The camera resolution of 1280 × 360 with a frame rate of 5 fps is obtained based on the stereo camera specifications in this study. The disparity of the stereo camera as a function of distance of the camera to the object of interest is measured. From the experimental results, the p constant is 1059.4, q constant is -0.527 over a distance of 10–100 cm. It shows that farther the object from the camera, the disparity decreases. This system will be used for performing physical measurement in the future.
{"title":"System and method for stereoscopic image acquisition","authors":"S. Ristanto, W. Nugroho, E. Sulistya, G. Suparta","doi":"10.1063/5.0058929","DOIUrl":"https://doi.org/10.1063/5.0058929","url":null,"abstract":"This paper discusses stereoscopic images gain using library in OpenCV on Python platform. The simple stereo camera system that can provide stereoscopic images in both as a picture (PNG) or as a video (AVI) is developed. The system comprises a stereo camera, a USB connector, a tripod, and a notebook with programming language of Python 3.7, along with the free library of OpenCV 4.0 installed inside the notebook. The system has successfully provided both images and videos. However, the spatial resolution and the frame rate depend to the specifications of the stereo camera being used. The camera resolution of 1280 × 360 with a frame rate of 5 fps is obtained based on the stereo camera specifications in this study. The disparity of the stereo camera as a function of distance of the camera to the object of interest is measured. From the experimental results, the p constant is 1059.4, q constant is -0.527 over a distance of 10–100 cm. It shows that farther the object from the camera, the disparity decreases. This system will be used for performing physical measurement in the future.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88309381","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}
Propensity score can be described as a probability of certain treatments conditional to the given observed covariates. Propensity score is one of the known methods to allows an observational study emulating certain characteristics from that of a randomized trial. The most common method used to estimate this score is the logistic regression model. Logistic regression can be used to model the probability of a certain event. With the advancement that is happening to spatial statistics, one can also build a logistic regression model that takes into consideration to that of spatial dependence. Thus, accommodate the spatial effect that is likely happening on observation data that came from different places. Problem arises from this model, that is the estimation of the parameters on the spatial logistic model. EM algorithm which is needed for this problem, still requires another adjustment since the expectation in the E-step is not available in closed form. Variational method modification is then proposed as an alternative for this problem. This paper reviews the propensity score estimation using spatial logistic regression and discusses the variational method as an alternative method to tackle the problem in estimating the parameters on the spatial logistic regression model in a theoretical study.
{"title":"Propensity score estimation using variational method on spatial logistic regression","authors":"H. N. Rizka, Y. Widyaningsih","doi":"10.1063/5.0059068","DOIUrl":"https://doi.org/10.1063/5.0059068","url":null,"abstract":"Propensity score can be described as a probability of certain treatments conditional to the given observed covariates. Propensity score is one of the known methods to allows an observational study emulating certain characteristics from that of a randomized trial. The most common method used to estimate this score is the logistic regression model. Logistic regression can be used to model the probability of a certain event. With the advancement that is happening to spatial statistics, one can also build a logistic regression model that takes into consideration to that of spatial dependence. Thus, accommodate the spatial effect that is likely happening on observation data that came from different places. Problem arises from this model, that is the estimation of the parameters on the spatial logistic model. EM algorithm which is needed for this problem, still requires another adjustment since the expectation in the E-step is not available in closed form. Variational method modification is then proposed as an alternative for this problem. This paper reviews the propensity score estimation using spatial logistic regression and discusses the variational method as an alternative method to tackle the problem in estimating the parameters on the spatial logistic regression model in a theoretical study.","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84050129","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 : 2021-01-01DOI: 10.1007/978-3-030-75809-7_5
J. D'Angelo
{"title":"Groups Associated with Holomorphic Mappings","authors":"J. D'Angelo","doi":"10.1007/978-3-030-75809-7_5","DOIUrl":"https://doi.org/10.1007/978-3-030-75809-7_5","url":null,"abstract":"","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84182428","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}
I. T. Rusmanatmojo, B. Rohman, R. Harianto, A. Awalludin
{"title":"The challenges from regulatory review and assessment of experimental power reactor site in Indonesia","authors":"I. T. Rusmanatmojo, B. Rohman, R. Harianto, A. Awalludin","doi":"10.1063/5.0058934","DOIUrl":"https://doi.org/10.1063/5.0058934","url":null,"abstract":"","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":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90273315","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 : 2021-01-01DOI: 10.1007/978-3-030-75809-7_4
J. D'Angelo
{"title":"Monomial Sphere Maps and Linear Programming","authors":"J. D'Angelo","doi":"10.1007/978-3-030-75809-7_4","DOIUrl":"https://doi.org/10.1007/978-3-030-75809-7_4","url":null,"abstract":"","PeriodicalId":20561,"journal":{"name":"PROCEEDINGS OF THE 6TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2020 (ISCPMS 2020)","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89073428","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}
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