INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019最新文献

{"title":"The effect of KI and KIO3 impregnation on prepared hydroxyapatite catalyst on biodiesel production","authors":"Permadi Wisnu Aji Wardani, J. Cahyonugroho, M. Wibowo, Widayat","doi":"10.1063/1.5141668","DOIUrl":"https://doi.org/10.1063/1.5141668","url":null,"abstract":"Substitution of homogeneous catalyst to heterogeneous catalyst is one of the alternative ways to simplify the separation process. In this research, hydroxyapatite (HAP) that was used as a catalyst on biodiesel production was prepared from natural phosphate rock. Effect of various impregnation on the catalyst was studied in characterized and performance test. The catalytic performance test was done using simultaneous esterification and transesterification reaction under operating condition of 60°C for 6 hours using waste cooking oil as the raw material. FTIR analysis showed that HAP catalyst had been successfully synthesized with the existence of functional group PO43- (phosphate) and CO3- (carbonate). The surface area of the catalyst by 13.513 m2/gr and specific pore volume by 0,0083 cc/gr at a concentration of 5%w/w KI while at 5% w/w KIO3 the surface area of the catalyst by 10.651 m2/gr and specific pore volume by 0.0065 cc/gr. The result of XRD analysis gives the value obtained at 28=46,75° for KI and 2θ = 34,53° for KIO3, which indicates that those components was successfully impregnated on HAP catalyst. The best value for each yield dan FAME obtained on 91,78% and 59,1% at a concentration of catalyst impregnation 5% w/w KISubstitution of homogeneous catalyst to heterogeneous catalyst is one of the alternative ways to simplify the separation process. In this research, hydroxyapatite (HAP) that was used as a catalyst on biodiesel production was prepared from natural phosphate rock. Effect of various impregnation on the catalyst was studied in characterized and performance test. The catalytic performance test was done using simultaneous esterification and transesterification reaction under operating condition of 60°C for 6 hours using waste cooking oil as the raw material. FTIR analysis showed that HAP catalyst had been successfully synthesized with the existence of functional group PO43- (phosphate) and CO3- (carbonate). The surface area of the catalyst by 13.513 m2/gr and specific pore volume by 0,0083 cc/gr at a concentration of 5%w/w KI while at 5% w/w KIO3 the surface area of the catalyst by 10.651 m2/gr and specific pore volume by 0.0065 cc/gr. The result of XRD analysis gives the value obtained at 28=46,75° for KI and ...","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123779055","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":"Committee: International Conference on Science and Applied Science (ICSAS 2019)","authors":"SuparmiA., NugrahaDewanta Arya","doi":"10.1063/1.5141613","DOIUrl":"https://doi.org/10.1063/1.5141613","url":null,"abstract":"","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115469933","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 planning for utilization of East Borneo hydro power with techno economy principle","authors":"Lauhil Machfudz Zakir, J. Windarta, S. Saptadi, David Rinaldo","doi":"10.1063/1.5141729","DOIUrl":"https://doi.org/10.1063/1.5141729","url":null,"abstract":"Conventional power plants are barely able to afford all of the needs, but they harm the environment as fossil-fueled electricity does. For now, investors and academicians are competing to make renewable energy power plants, one of which is a hydroelectric power plant. Data of National Energy General Plan issued by the government show that East Kalimantan has the potential of water and solar energy of 13,479 MW. Therefore, this study chooses Tabang, East Kalimantan as a study case to construct a hydroelectric power plant using techno-economic principles. There are three alternatives for the installation of dams with maximum capacities of 219.99 m3/s, 468.72 m3/s, and 550.91 m3/s, respectively; the last is chosen for this research. The optimization result in a maximum water discharge is 253.85 m3/s with an installed capacity of 205.14 MW. The type of water turbine chosen is vertical shaft Francis with an output of 70,808 kW, and the generator is 68,684 kW. The results of this study show that the energy costs range from Rp537.2/kWh. The energy cost is enough to do the construction with an average cost of supply that East Kalimantan has Rp930.1/kWh.Conventional power plants are barely able to afford all of the needs, but they harm the environment as fossil-fueled electricity does. For now, investors and academicians are competing to make renewable energy power plants, one of which is a hydroelectric power plant. Data of National Energy General Plan issued by the government show that East Kalimantan has the potential of water and solar energy of 13,479 MW. Therefore, this study chooses Tabang, East Kalimantan as a study case to construct a hydroelectric power plant using techno-economic principles. There are three alternatives for the installation of dams with maximum capacities of 219.99 m3/s, 468.72 m3/s, and 550.91 m3/s, respectively; the last is chosen for this research. The optimization result in a maximum water discharge is 253.85 m3/s with an installed capacity of 205.14 MW. The type of water turbine chosen is vertical shaft Francis with an output of 70,808 kW, and the generator is 68,684 kW. The results of this study show that the energy cost...","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114271496","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":"A low cost and open-source anthropomorphic prosthetics hand for transradial amputee","authors":"Triwiyanto, Torib Hamzah, Sari Luthfiyah, I. P. A. Pawana, B. Utomo","doi":"10.1063/1.5141699","DOIUrl":"https://doi.org/10.1063/1.5141699","url":null,"abstract":"Available prosthetics hand is expensive and beyond the ability to buy for the amputee, especially in the developing country. The designing a low-cost prosthetics hand is very important because it can be fabricated with a minimum cost. Therefore, this study aims to design an anthropomorphic prosthetics hand with a low cost and open source to the public. In this study, the prosthetics hand composed of an anthropomorphic artificial hand, motor servo and electronics circuits. The anthropomorphic artificial hand was designed using Blender (the three-dimension (30) application program) and Cura Ultimaker (the 30 printing application program). The material used to build the hand was polylactic acid (PLA). The electronics circuit consisted of dry electrodes, EMG amplifier, microcontroller Arduino, and two servo motor. In the implementation, the cost to build the prosthetics hand was US$ 161, and the weight is 678 grams. The EMG signal had a different pattern and amplitude when the hand performed the close and ope...","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"81 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116733845","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":"Bioelectricity production from Tofu wastewater using microbial-microalgae fuel cell technology (MMFC)","authors":"Anang Baharuddin Sahaq, Hadiyanto","doi":"10.1063/1.5141684","DOIUrl":"https://doi.org/10.1063/1.5141684","url":null,"abstract":"Tofu industries have been known as one of the household industries that spread all over cities in Indonesia, and that makes the significant amount of wastewater. Tofu wastewater contains a high measure of COD that can cause environmental damage if it doesn’t reduce before flowing on the waterways. In this study, explains the COD reduction of wastewater from the tofu industry for electricity generation and biomass production of microalgae Spirulina Platensis within Microalgae-Microbial Fuel Cell (MMFC). Anaerobic microbes in tofu wastewater were used in the anode chamber and produced electron. Spirulina platensis culture in cathode chamber produced oxygen for the Oxygen Reduction Reaction by carbon-based electrode such as graphite. The result of this study showed that MMFC could generate electricity up to 171,44 mW.m−2 when two pieces of graphite electrode were adopt in the system with a membrane surface area was 2.85 cm2. The OD spirulina achieved 0,513 on day 7. The COD removal achieved 42% for ratio 2:2 cathode when applied in the MMFC system.","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129959986","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":"Electron-positron plasmas as an “in-silico probe” for fundamental plasma physics","authors":"A. Kendl","doi":"10.1063/1.5135832","DOIUrl":"https://doi.org/10.1063/1.5135832","url":null,"abstract":"Positrons are routinely used for probing structural properties of matter, but are also a subject of interest in themselves. An electron-positron plasma is the most fundamental sustained macroscopic matter-antimatter system achievable in a laboratory and may be effectively confined by magnetic fields. Such a magnetized electron-positron plasma would allow to study fundamental plasma physics processes and their manifestation in mass-symmetric pair plasmas. Some particular models for drift instabilities and turbulence in magnetized electron-positron plasmas, which may impact on transport losses and confinement of planned experiments, are reviewed. We further discuss how studying electron-positron plasmas by experiment, theory and (“in silico”) simulation can facilitate validation of general fundamental plasma physics principles and models.Positrons are routinely used for probing structural properties of matter, but are also a subject of interest in themselves. An electron-positron plasma is the most fundamental sustained macroscopic matter-antimatter system achievable in a laboratory and may be effectively confined by magnetic fields. Such a magnetized electron-positron plasma would allow to study fundamental plasma physics processes and their manifestation in mass-symmetric pair plasmas. Some particular models for drift instabilities and turbulence in magnetized electron-positron plasmas, which may impact on transport losses and confinement of planned experiments, are reviewed. We further discuss how studying electron-positron plasmas by experiment, theory and (“in silico”) simulation can facilitate validation of general fundamental plasma physics principles and models.","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128724895","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":"Pre service teacher’s concept understanding profile about DC circuit based on multiple representation","authors":"Maria Dewati, A. Suparmi, W. Sunarno, Sukarmin, C. Cari","doi":"10.1063/1.5141674","DOIUrl":"https://doi.org/10.1063/1.5141674","url":null,"abstract":"Student learning achievement that has not been maximized is one of the factors that explain the learning difficulties experienced by students. Difficulties can be caused by poor understanding of student concepts. One identification of concept understanding by measuring students’ ability to deal with physical problems using a multiple representation model. This study aims to describe the profile level of understanding of DC circuit concepts based on multiple representation models. This research is a descriptive qualitative type. The population is physics semester 4 students from the Universities of Jakarta and Bengkulu with a sample of 90 students. The results obtained are based on the average percentage of students’ understanding of concepts 30.8% and the ability of students to answer multiple representation questions 31.4%. Understanding the concept, the DC circuit material in the form of series and parallel is still low and has not been maximally fulfilled for all students.Student learning achievement that has not been maximized is one of the factors that explain the learning difficulties experienced by students. Difficulties can be caused by poor understanding of student concepts. One identification of concept understanding by measuring students’ ability to deal with physical problems using a multiple representation model. This study aims to describe the profile level of understanding of DC circuit concepts based on multiple representation models. This research is a descriptive qualitative type. The population is physics semester 4 students from the Universities of Jakarta and Bengkulu with a sample of 90 students. The results obtained are based on the average percentage of students’ understanding of concepts 30.8% and the ability of students to answer multiple representation questions 31.4%. Understanding the concept, the DC circuit material in the form of series and parallel is still low and has not been maximally fulfilled for all students.","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124683469","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":"Ion-induced processes in polymer composite materials: Positron annihilation spectroscopy in combination with UV-Vis absorption and Raman spectroscopy","authors":"T. Kavetskyy, A. Kuczumow, K. Iida, Y. Nagashima, M. Liedke, M. Butterling, A. Wagner, R. Krause-Rehberg, O. Šauša, T. Petkova, V. Boev, A. Kiv, A. Stepanov","doi":"10.1063/1.5135867","DOIUrl":"https://doi.org/10.1063/1.5135867","url":null,"abstract":"Application of positron annihilation spectroscopy using a variable-energy slow positron beam (VESPB) as a key experimental tool to understand ion-induced processes and defect structures in a number of polymer composite materials important for a practical use is demonstrated. The results concerning 40 keV B+ implanted polymethylmethacrylate (B:PMMA) and 30 keV Ag+ implanted PMMA (Ag:PMMA), and organic-inorganic ureasil composite (Ag:ureasil) are discussed. Utilized VESPB techniques allow to confirm carbonization of ion-irradiated B:PMMA, formation of carbon-shell Ag-core nanoparticles in Ag:PMMA and evolution in size of Ag nanoparticles in Ag:ureasil, which was revealed by means of UV-Vis absorption and Raman spectroscopy measurements.Application of positron annihilation spectroscopy using a variable-energy slow positron beam (VESPB) as a key experimental tool to understand ion-induced processes and defect structures in a number of polymer composite materials important for a practical use is demonstrated. The results concerning 40 keV B+ implanted polymethylmethacrylate (B:PMMA) and 30 keV Ag+ implanted PMMA (Ag:PMMA), and organic-inorganic ureasil composite (Ag:ureasil) are discussed. Utilized VESPB techniques allow to confirm carbonization of ion-irradiated B:PMMA, formation of carbon-shell Ag-core nanoparticles in Ag:PMMA and evolution in size of Ag nanoparticles in Ag:ureasil, which was revealed by means of UV-Vis absorption and Raman spectroscopy measurements.","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127006452","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":"Lens decentration of spectacle wearers","authors":"H. N. Husna, Ai Meri Yulianti","doi":"10.1063/1.5141632","DOIUrl":"https://doi.org/10.1063/1.5141632","url":null,"abstract":"Lens decentration equals the difference of the distance between the optical center and pupil distance. Though this could lead into various visual problems, it had not been taken into consideration since measurement on pupil-distance rarely conducted while producing spectacles. Determining whether spectacle wearers encountered lens decentration, 89 bespectacled students (ages 18-22 years-old) at STIKes Bakti Tunas Husada Tasikmalaya were examined. Their optical center was measured using lens meter, and their pupil distance was measured by pupil distance ruler. All measurements were performed while subjects were wearing spectacles on a daily basis. The findings reveal that the average interpupillary distance was 63.2 mm ± 7.63 mm and optical center was 63.53 mm ± 8.54 mm. Furthermore, there was 64.1% spectacle lens categorized as ’no decentration’ and 35.9 % spectacle lens categorized as ’decentration’. The researcher also found out that the lens decentration has maximum decentration of 3-5 mm for both eyes. Thus, it can be concluded that some of the spectacle wearers have lens decentration which can lead to induced prismatic effect and causes further visual impairments such as asthenopia or diplopia in the future.Lens decentration equals the difference of the distance between the optical center and pupil distance. Though this could lead into various visual problems, it had not been taken into consideration since measurement on pupil-distance rarely conducted while producing spectacles. Determining whether spectacle wearers encountered lens decentration, 89 bespectacled students (ages 18-22 years-old) at STIKes Bakti Tunas Husada Tasikmalaya were examined. Their optical center was measured using lens meter, and their pupil distance was measured by pupil distance ruler. All measurements were performed while subjects were wearing spectacles on a daily basis. The findings reveal that the average interpupillary distance was 63.2 mm ± 7.63 mm and optical center was 63.53 mm ± 8.54 mm. Furthermore, there was 64.1% spectacle lens categorized as ’no decentration’ and 35.9 % spectacle lens categorized as ’decentration’. The researcher also found out that the lens decentration has maximum decentration of 3-5 mm for both eyes...","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122278910","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 design and stress analysis of a 10.000 barrel fixed roof crude oil storage tank","authors":"M. Masrukhi, Pekik Mahardhika, Ika Erawati, Bagas Probo Wasono","doi":"10.1063/1.5141661","DOIUrl":"https://doi.org/10.1063/1.5141661","url":null,"abstract":"Improving facility such as storage tank for crude oil distribution is essential as a means to preserve the running of the production process. Many industries, especially in the crude oil industry, carbon steel material of tank become the widely used material. This recent study intended to design the crude oil storage tank using the API 650 standard. Fixed Cone Roof Tanks with 10,000 barrels of capacity using A36 material was chosen as the storage tanks. Based on the manual calculation, it was obtained that the thickness of the actual shell plate was 6 mm. The result of the calculation also determined that the bottom plate and annular bottom had each 9 mm for the thickness and the roof plate had 6 mm of thickness. While the highest stress distribution, which was still under the allowable stress occurred on the bottom part. The analysis of storage tanks also determined that the stress due to static stress, circumferential stress, and longitudinal stress were under the allowable stress of the material.Improving facility such as storage tank for crude oil distribution is essential as a means to preserve the running of the production process. Many industries, especially in the crude oil industry, carbon steel material of tank become the widely used material. This recent study intended to design the crude oil storage tank using the API 650 standard. Fixed Cone Roof Tanks with 10,000 barrels of capacity using A36 material was chosen as the storage tanks. Based on the manual calculation, it was obtained that the thickness of the actual shell plate was 6 mm. The result of the calculation also determined that the bottom plate and annular bottom had each 9 mm for the thickness and the roof plate had 6 mm of thickness. While the highest stress distribution, which was still under the allowable stress occurred on the bottom part. The analysis of storage tanks also determined that the stress due to static stress, circumferential stress, and longitudinal stress were under the allowable stress of the material.","PeriodicalId":243773,"journal":{"name":"INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS) 2019","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130120315","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}