PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)最新文献

{"title":"Phytochemical analysis and antioxidant activity of leaves and flowers extracts of mistletoe (Dendrophthoe pentandra (L.) Miq.), collected from UI Campus, Depok","authors":"L. Alharits, W. Handayani, Yasman, N. M. Hemelda","doi":"10.1063/1.5132528","DOIUrl":"https://doi.org/10.1063/1.5132528","url":null,"abstract":"","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115501952","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":"Implementation of agglomerative clustering and genetic algorithm on stock portfolio optimization with possibilistic constraints","authors":"R. Yusuf, B. Handari, G. Hertono","doi":"10.1063/1.5132455","DOIUrl":"https://doi.org/10.1063/1.5132455","url":null,"abstract":"Portfolio optimization aims to protect investors against any risks which they may experience. Stock diversification is one of the solutions to optimize stock portfolio, where a diverse portfolio tends to have less risk than the undiversified one. Agglomerative clustering is a hierarchical clustering method. Applying diversification concept, agglomerative clustering is used to cluster 40 different assets based on their financial ratio scores (Current Ratio, Debt-Equity Ratio, Profit Margin, Return on Equity, Price/Earnings per Growth, EPS diluted, and Price/Earnings Ratio). Genetic algorithm is search method based on principles of natural selection and genetics. After the stocks are clustered, Genetic algorithm with heuristic crossover is applied to each cluster alongside to determine the proportion of each stock. In this paper, a possibilistic mean-semi-absolute deviation optimization model is used where cardinality, quantity, and transaction cost are considered as constraints. We also use the assumption that the returns of risky assets are fuzzy numbers. The implementation shows that the method gave a higher level of return (29.77 %) and Sharpe’s ratio (18.71) compared to S&P 500 index in the same period of time (12.34 % and 2.7 respectively).Portfolio optimization aims to protect investors against any risks which they may experience. Stock diversification is one of the solutions to optimize stock portfolio, where a diverse portfolio tends to have less risk than the undiversified one. Agglomerative clustering is a hierarchical clustering method. Applying diversification concept, agglomerative clustering is used to cluster 40 different assets based on their financial ratio scores (Current Ratio, Debt-Equity Ratio, Profit Margin, Return on Equity, Price/Earnings per Growth, EPS diluted, and Price/Earnings Ratio). Genetic algorithm is search method based on principles of natural selection and genetics. After the stocks are clustered, Genetic algorithm with heuristic crossover is applied to each cluster alongside to determine the proportion of each stock. In this paper, a possibilistic mean-semi-absolute deviation optimization model is used where cardinality, quantity, and transaction cost are considered as constraints. We also use the assumption ...","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114503255","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":"Genetic variation of Elephas maximus sumatranus from Bukit Barisan Selatan National Park, Indonesia","authors":"M. N. Nur, A. E. Maryanto, N. Andayani, A. Syarifa, B. A. Nofinska, V. Kheng, S. Sumayyah","doi":"10.1063/1.5132501","DOIUrl":"https://doi.org/10.1063/1.5132501","url":null,"abstract":"","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123543278","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":"Design of Magnetic Induction tomography system using 12 transmitter and receiver coils","authors":"G. Widagdo, S. Wijaya, P. Prajitno","doi":"10.1063/1.5132442","DOIUrl":"https://doi.org/10.1063/1.5132442","url":null,"abstract":"A Magnetic Induction Tomography (MIT) system, one of tomography systems with non-invasive modality, which uses magnetic field induction to reconstruct the distribution of electrical conductivity in an object material has been developed. MIT is a low resolution tomography technique based on the rate of changes in the magnetic flux due to the test material with respect to the main alternating magnetic flux. In this study, the MIT system was designed using 12 receiver and transmitter coils, with an excitation signal in the form of a sinusoidal electrical signal with amplitude of 5 V, frequency of 2 MHz. The coil used has 100 turns of copper wire, with inner diameter of 15.5 mm, and length of 4 cm. Coils are arranged in a circle with an inner diameter of 12 cm and each coil forms a 30 degree angle to each other. The magnitude of the induced electrical voltage at the receiving coil that is influenced by the rate of change of magnetic flux on the transmitter coil, is also affected by the permeability of the medium between the transmitter and receiver coil. The induction electrical voltage on the receiving coils are measured by the MIT data acquisition system, and then the image reconstruction process is carried-out based on those data. This MIT system has been tested by placing an object material in the form of an empty cylindrical iron and also an empty box-shaped iron. This research has been able to get the 2D reconstruction image in accordance with the actual shape of the test material object but not yet perfect.","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121895802","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":"Forecasting Indonesian mortality rates using by Lee-Carter model and Regression Linear model","authors":"N. Aji, S. Mardiyati, M. Malik","doi":"10.1063/1.5132468","DOIUrl":"https://doi.org/10.1063/1.5132468","url":null,"abstract":"","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121967272","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":"Bioactivities of Salam leaf (Syzygium polyanthum (Wight) Walp)","authors":"I. D. Dewijanti, W. Mangunwardoyo, N. Artanti, M. Hanafi","doi":"10.1063/1.5132499","DOIUrl":"https://doi.org/10.1063/1.5132499","url":null,"abstract":"Plants are source of medicinal compounds. Salam leaf or Indonesian bay leaf (Syzygium polyanthum (Wight) Walp) from the family of Myrtaceae are widely used as herbs and spices for cooking (culinary) and as traditional medicine for diabetes, diarrhea, and hypertension. Indonesian bay leaf contains many compounds including essential oils, tannins, and flavonoids. In this study, 70 % and 96 % ethanol extracts of bay leaf obtained from the garden in Research Center for Science and Technology (PUSPIPTEK), Serpong, Tangerang Selatan, Indonesia were tested in vitro according to α-glucosidase inhibition method to determine antidiabetic activity and to scavenge DPPH free radicals in order to determine antioxidant activity and toxicity on Brine Shrimp Lethality Test (BSLT). The results showed that extraction of Indonesian bay leaf by using 70 % and 96 % ethanol extracts have anti diabetic activity (97.37 % and 95.51 % α-glucosidase inhibition) and antioxidants activities (89.66 % and 69.18 % DPPH inhibition), respectively and have very low toxic effects on brine shrimp larvae (LD50 > 1,000 µg/mL).Plants are source of medicinal compounds. Salam leaf or Indonesian bay leaf (Syzygium polyanthum (Wight) Walp) from the family of Myrtaceae are widely used as herbs and spices for cooking (culinary) and as traditional medicine for diabetes, diarrhea, and hypertension. Indonesian bay leaf contains many compounds including essential oils, tannins, and flavonoids. In this study, 70 % and 96 % ethanol extracts of bay leaf obtained from the garden in Research Center for Science and Technology (PUSPIPTEK), Serpong, Tangerang Selatan, Indonesia were tested in vitro according to α-glucosidase inhibition method to determine antidiabetic activity and to scavenge DPPH free radicals in order to determine antioxidant activity and toxicity on Brine Shrimp Lethality Test (BSLT). The results showed that extraction of Indonesian bay leaf by using 70 % and 96 % ethanol extracts have anti diabetic activity (97.37 % and 95.51 % α-glucosidase inhibition) and antioxidants activities (89.66 % and 69.18 % DPPH inhibition), respe...","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131717366","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":"Application of homogenization process to the hydrolysis technique on removing mucilaginous sheath of branched filamentous Cyanobacteria","authors":"K. Loka, Dian Hendrayanti, A. A. Nasrul, S. W. R. Hilia, R. Lestari","doi":"10.1063/1.5132533","DOIUrl":"https://doi.org/10.1063/1.5132533","url":null,"abstract":"Research on the optimization of hydrolysis techniques on the removal of mucilaginous sheath branched filamentous Cyanobacteria has been carried out. The optimizations included the homogenizing process and addition of nitrogen in growth medium. The aim of the study is to analyze the process of hydrolysis based on the absence and presence of Nitrogen in culture medium and to analyze the effect of hydrolysis on removing the mucilaginous sheath. The hydrolysis treatment was performed on three strains of branched filamentous Cyanobacteria were used in this study: SO–130, SO–133 and SO–198 using five replications with homogenization process used five glass beads BioSpect 3.2 mm. The results were observed using microscopic observations with and without negative staining. The result showed that the mucilaginous sheath of three strains was disappeared after hydrolysis process that growth in medium with and without nitrogen. The DNA purity in all treatments was 0.81–1.19, indicating the absence of pure DNA. The DNA concentration were 1.63–6.47 ng/µL and have the same pattern in the three strains that was decreasing from control to treatment.Research on the optimization of hydrolysis techniques on the removal of mucilaginous sheath branched filamentous Cyanobacteria has been carried out. The optimizations included the homogenizing process and addition of nitrogen in growth medium. The aim of the study is to analyze the process of hydrolysis based on the absence and presence of Nitrogen in culture medium and to analyze the effect of hydrolysis on removing the mucilaginous sheath. The hydrolysis treatment was performed on three strains of branched filamentous Cyanobacteria were used in this study: SO–130, SO–133 and SO–198 using five replications with homogenization process used five glass beads BioSpect 3.2 mm. The results were observed using microscopic observations with and without negative staining. The result showed that the mucilaginous sheath of three strains was disappeared after hydrolysis process that growth in medium with and without nitrogen. The DNA purity in all treatments was 0.81–1.19, indicating the absence of pure DNA. The DNA...","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125544721","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":"Community structure of plant-associated mangroves at Blanakan Fishpond Area, Subang, West Java","authors":"S. Khorimatun, N. Takarina, T. Soedjiarti","doi":"10.1063/1.5132512","DOIUrl":"https://doi.org/10.1063/1.5132512","url":null,"abstract":"","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121482472","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":"Path integral quantization of an interacting pure spin-3/2 field","authors":"J. Kristiano, T. Mart","doi":"10.1063/1.5132429","DOIUrl":"https://doi.org/10.1063/1.5132429","url":null,"abstract":"We present a brief strategy to use the second-order theory for fermions to construct the interactions of pure spin-3/2 particles. For this purpose we exploit the antisymmetric-tensor spinor representation and follow the Pascalutsa’s prescription. We found that the constraints for pure spin-3/2 field cannot be explicitly determined.We present a brief strategy to use the second-order theory for fermions to construct the interactions of pure spin-3/2 particles. For this purpose we exploit the antisymmetric-tensor spinor representation and follow the Pascalutsa’s prescription. We found that the constraints for pure spin-3/2 field cannot be explicitly determined.","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127774095","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 effect of egg yolk as natural cryoprotectant on giant grouper (Epinephelus lanceolatus) spermatozoa motility","authors":"T. Pratiwi, A. Abinawanto, R. Lestari, A. Bowolaksono, N. G. Zavitri","doi":"10.1063/1.5132518","DOIUrl":"https://doi.org/10.1063/1.5132518","url":null,"abstract":"This research was to determine the optimum concentration of egg yolk on spermatozoa motility of Giant Grouper 48 hours after cryopreservation. Egg yolk used in this study were 0 %, 5 %, 10 %, 15 %, 20 % and 25 %, respectively, combined with 6 % glycerol. Sperm was collected by a hand stripping method. Sperms were then conditioned at 4 °C for 10 minutes and were refrigerated at −20 °C for 48 hours. Thawing was carried out at 4 °C for 30–60 seconds. Spermatozoa motility was evaluated before and after frozen. According to Anova test, there was a notable impact (p≤0.05) from a varied contents of egg yolk on post-thaw spermatozoa motility. Based on the Tukey test, the concentration of 15 % of egg yolk showed the highest post-thaw spermatozoa motility (83.64±1.72 %) on post-thaw motility (p<0.05). Fifteen percent of egg yolk demonstrated the optimum concentration in this study.This research was to determine the optimum concentration of egg yolk on spermatozoa motility of Giant Grouper 48 hours after cryopreservation. Egg yolk used in this study were 0 %, 5 %, 10 %, 15 %, 20 % and 25 %, respectively, combined with 6 % glycerol. Sperm was collected by a hand stripping method. Sperms were then conditioned at 4 °C for 10 minutes and were refrigerated at −20 °C for 48 hours. Thawing was carried out at 4 °C for 30–60 seconds. Spermatozoa motility was evaluated before and after frozen. According to Anova test, there was a notable impact (p≤0.05) from a varied contents of egg yolk on post-thaw spermatozoa motility. Based on the Tukey test, the concentration of 15 % of egg yolk showed the highest post-thaw spermatozoa motility (83.64±1.72 %) on post-thaw motility (p<0.05). Fifteen percent of egg yolk demonstrated the optimum concentration in this study.","PeriodicalId":376274,"journal":{"name":"PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2018)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133193363","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}