Pub Date : 2024-01-28DOI: 10.13170/aijst.12.3.34451
R. Kusumawardani, A. Kusbiantoro, Untoro Nugroho, Togani Cahyani Upomo, Erlia Dewi Novita, Imam Agus Nugroho, Kirana Prasetya Azizah
It is crucial to perform routine bridge maintenance in order to evaluate the structure's current state. As a result, it is possible to guarantee that the bridge structure can offer services that are both comfortable and secure. The bridge structure being able to reach the service life as planned is another goal that can be accomplished. Visual inspection or the use of some currently popular sensors can be used to monitor the condition of the bridge. The dynamic properties of a structure including modal frequency and mode shape will be used to determine the structure's present and potential future conditions. Using a velocitymeter, vibration data collection is conducted as the first step. The next step is analyzing data to determine natural frequency. The fundamental frequency of the Tugu Suharto bridge structure in Semarang was determined to be 3.995 Hz. Future bridge structure condition monitoring can be done using frequency data and finite element model. The condition of bridge infrastructure in the future for one city is an important thing that must be considered. Some bridges are classified as structurally deficient, and many bridges are nearing the end of their design lives. The next generation of Semarang highway bridges is currently being designed and built, but existing bridges still need to be maintained through proper inspection and load rating. In order to incorporate structural modeling, instrumentation, and nondestructive testing into the design, construction, and management of bridges, this study proposes an objective load rating protocol. Using information gathered from structural health monitoring (SHM), a baseline structural model is developed and verified. The load rating factors of the bridge are then determined using the structural model under both real-condition and simulated damaged conditions.
{"title":"Structural Health Monitoring by Identification Dynamic Properties and Load Rating Factor at Multi-span Prestressed Concrete Girder Bridge","authors":"R. Kusumawardani, A. Kusbiantoro, Untoro Nugroho, Togani Cahyani Upomo, Erlia Dewi Novita, Imam Agus Nugroho, Kirana Prasetya Azizah","doi":"10.13170/aijst.12.3.34451","DOIUrl":"https://doi.org/10.13170/aijst.12.3.34451","url":null,"abstract":"It is crucial to perform routine bridge maintenance in order to evaluate the structure's current state. As a result, it is possible to guarantee that the bridge structure can offer services that are both comfortable and secure. The bridge structure being able to reach the service life as planned is another goal that can be accomplished. Visual inspection or the use of some currently popular sensors can be used to monitor the condition of the bridge. The dynamic properties of a structure including modal frequency and mode shape will be used to determine the structure's present and potential future conditions. Using a velocitymeter, vibration data collection is conducted as the first step. The next step is analyzing data to determine natural frequency. The fundamental frequency of the Tugu Suharto bridge structure in Semarang was determined to be 3.995 Hz. Future bridge structure condition monitoring can be done using frequency data and finite element model. The condition of bridge infrastructure in the future for one city is an important thing that must be considered. Some bridges are classified as structurally deficient, and many bridges are nearing the end of their design lives. The next generation of Semarang highway bridges is currently being designed and built, but existing bridges still need to be maintained through proper inspection and load rating. In order to incorporate structural modeling, instrumentation, and nondestructive testing into the design, construction, and management of bridges, this study proposes an objective load rating protocol. Using information gathered from structural health monitoring (SHM), a baseline structural model is developed and verified. The load rating factors of the bridge are then determined using the structural model under both real-condition and simulated damaged conditions.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"188 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140491586","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}
The present study determined the isotherm and kinetics model of the cadmium adsorption process onto a biosorbent made from kepok banana peel (Musa Acuminata balbisian). The experiments were carried out in batch process, laboratories scale, room temperature, pH of Cadmium of 4, volume of Cd solution of 20 ml, and biosorbent size particle of 60 mesh—the biosorbent produced using chemical activation method onto dry banana peel. The variation in this research was the type of activator (H3PO4 and H2SO4) and the biosorbent dosage (1, 1.5, and 2 g). The experimental data was used to calculate the Langmuir and Freundlich isotherm—Kinetics analysis based on pseudo-first-order and second-order kinetics models. The best condition of the cadmium removal occurred at 90 minutes of contact time and 2 g dosage for H2SO4 and H3PO4 activators. Cadmium biosorption was in accordance with the Langmuir isotherm and pseudo-second-order kinetic model. The linear equation obtained is positive, with the maximum adsorption capacity and the affinity constant. Cadmium adsorption onto banana peel biosorbents followed the Langmuir adsorption isotherm pattern, so chemical adsorption occurred in this study. Cadmium adsorption kinetics onto biosorbent that activated with an acid activator of H3PO4 and H2SO4 followed the pseudo-second-order kinetic model. The best condition of the cadmium removal occurred at 90 minutes of contact time and 2 g dosage for H2SO4 and H3PO4 activators. Cadmium biosorption in this study was in accordance with the Langmuir isotherm and pseudo-second-order
{"title":"Isotherm and Kinetic Adsorption of Cadmium (Cd) onto Biosorbent Made from Kepok Banana Peel (Musa Acuminata balbisian): the Effect of Activator Type and Biosorbent Dosage","authors":"Lia Cundari, Alna Livia Fanneza, Nanda Citra Arisma, Asha Aisha Julian","doi":"10.13170/aijst.12.2.27947","DOIUrl":"https://doi.org/10.13170/aijst.12.2.27947","url":null,"abstract":"The present study determined the isotherm and kinetics model of the cadmium adsorption process onto a biosorbent made from kepok banana peel (Musa Acuminata balbisian). The experiments were carried out in batch process, laboratories scale, room temperature, pH of Cadmium of 4, volume of Cd solution of 20 ml, and biosorbent size particle of 60 mesh—the biosorbent produced using chemical activation method onto dry banana peel. The variation in this research was the type of activator (H3PO4 and H2SO4) and the biosorbent dosage (1, 1.5, and 2 g). The experimental data was used to calculate the Langmuir and Freundlich isotherm—Kinetics analysis based on pseudo-first-order and second-order kinetics models. The best condition of the cadmium removal occurred at 90 minutes of contact time and 2 g dosage for H2SO4 and H3PO4 activators. Cadmium biosorption was in accordance with the Langmuir isotherm and pseudo-second-order kinetic model. The linear equation obtained is positive, with the maximum adsorption capacity and the affinity constant. Cadmium adsorption onto banana peel biosorbents followed the Langmuir adsorption isotherm pattern, so chemical adsorption occurred in this study. Cadmium adsorption kinetics onto biosorbent that activated with an acid activator of H3PO4 and H2SO4 followed the pseudo-second-order kinetic model. The best condition of the cadmium removal occurred at 90 minutes of contact time and 2 g dosage for H2SO4 and H3PO4 activators. Cadmium biosorption in this study was in accordance with the Langmuir isotherm and pseudo-second-order","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135205621","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 : 2023-09-06DOI: 10.13170/aijst.12.2.33010
Adzlin Azmi, Abdi Hanra Sebayang, Aditiya Harjon
Owing to the unavailability of electricity in many remote areas in Peninsular and East Malaysia, these areas do not have access to telephone signals. In remote areas, a diesel generator is used as the power source for the telecommunications base station. Hence, the continuous supply of diesel (which is a fossil fuel) is necessary in these remote areas. In this study, an attempt is made to assess the potential of replacing diesel-generated electricity with wind energy, which is renewable energy. Life cycle cost analysis is carried out, and the payback period of a wind energy system is determined for a remote telecommunications base station in Malaysia. The load characteristics and wind data are obtained from the Mersing Meteorological Station, Malaysia, and it was found that the annual load and base load are 12 kW. Hence, a 12-kW wind turbine is selected for the life cycle cost analysis at the site. The results show that the total specific cost of the 12-kW wind turbine is MYR 0.27/kWh based on a discount rate of 5% and electricity tariff in Malaysia of MYR 0.28/kWh. The payback period and discounted payback period of the 12-kW wind turbine are estimated to be 11.8 and 18.2 yr, respectively. Based on the load characteristics in Mersing, Malaysia, the 12-kW wind turbine is economically viable for the remote telecommunications base station. Nonetheless, the 12-kW wind turbine is not financially feasible because the simple payback period is greater than 1/3 of the wind turbine's lifetime, which is 20 years. The 12-kW wind turbine, on the other hand, is suitable for use as a remote telecommunications base station.
{"title":"Life Cycle Cost Analysis and Payback Period of 12-kW Wind Turbine for a Remote Telecommunications Base Station","authors":"Adzlin Azmi, Abdi Hanra Sebayang, Aditiya Harjon","doi":"10.13170/aijst.12.2.33010","DOIUrl":"https://doi.org/10.13170/aijst.12.2.33010","url":null,"abstract":"Owing to the unavailability of electricity in many remote areas in Peninsular and East Malaysia, these areas do not have access to telephone signals. In remote areas, a diesel generator is used as the power source for the telecommunications base station. Hence, the continuous supply of diesel (which is a fossil fuel) is necessary in these remote areas. In this study, an attempt is made to assess the potential of replacing diesel-generated electricity with wind energy, which is renewable energy. Life cycle cost analysis is carried out, and the payback period of a wind energy system is determined for a remote telecommunications base station in Malaysia. The load characteristics and wind data are obtained from the Mersing Meteorological Station, Malaysia, and it was found that the annual load and base load are 12 kW. Hence, a 12-kW wind turbine is selected for the life cycle cost analysis at the site. The results show that the total specific cost of the 12-kW wind turbine is MYR 0.27/kWh based on a discount rate of 5% and electricity tariff in Malaysia of MYR 0.28/kWh. The payback period and discounted payback period of the 12-kW wind turbine are estimated to be 11.8 and 18.2 yr, respectively. Based on the load characteristics in Mersing, Malaysia, the 12-kW wind turbine is economically viable for the remote telecommunications base station. Nonetheless, the 12-kW wind turbine is not financially feasible because the simple payback period is greater than 1/3 of the wind turbine's lifetime, which is 20 years. The 12-kW wind turbine, on the other hand, is suitable for use as a remote telecommunications base station.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135205623","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 : 2023-09-05DOI: 10.13170/aijst.12.2.32532
Khairul Iqbal, Moh Abduh, , Variadi
The multi-reservoir operation rules require accuracy in developing its technical parameters. This is done to prevent operational failure in one of the reservoirs. The water transfer concept is to manage the water resources distribution between the receiving watershed and the donor watershed. The availability of transferable water must be prioritized, meeting the water demand of the donor reservoir. Storage capacity in both reservoirs aims to meet water demand, especially in the recipient. The elevation of the interconnecting tunnel is the minimum limit for water use in simulation. The interconnected tunnels' location and capacity will determine the multi-reservoir's operation rule. The interconnected tunnel in the Rukoh Tiro reservoir transfers water in the operation of the two reservoirs. The simulation is carried out in three seasons, considering the inflow of each watershed, the reservoir's downstream water demand, and the reservoir's technical conditions. The simulation results of the Rukoh Tiro reservoir operated simultaneously in all three seasons show that the fulfillment of irrigation water demand can reach 100% as needed. The water transfer process through interconnected tunnels occurs throughout the year. The reservoir operating rule is expected to be a reference in the multi-reservoir operation to obtain an optimal reservoir operating rule.
{"title":"Simulation of Multi Reservoir Operation Rules with Interconnected Tunnel and Water Transfer","authors":"Khairul Iqbal, Moh Abduh, , Variadi","doi":"10.13170/aijst.12.2.32532","DOIUrl":"https://doi.org/10.13170/aijst.12.2.32532","url":null,"abstract":"The multi-reservoir operation rules require accuracy in developing its technical parameters. This is done to prevent operational failure in one of the reservoirs. The water transfer concept is to manage the water resources distribution between the receiving watershed and the donor watershed. The availability of transferable water must be prioritized, meeting the water demand of the donor reservoir. Storage capacity in both reservoirs aims to meet water demand, especially in the recipient. The elevation of the interconnecting tunnel is the minimum limit for water use in simulation. The interconnected tunnels' location and capacity will determine the multi-reservoir's operation rule. The interconnected tunnel in the Rukoh Tiro reservoir transfers water in the operation of the two reservoirs. The simulation is carried out in three seasons, considering the inflow of each watershed, the reservoir's downstream water demand, and the reservoir's technical conditions. The simulation results of the Rukoh Tiro reservoir operated simultaneously in all three seasons show that the fulfillment of irrigation water demand can reach 100% as needed. The water transfer process through interconnected tunnels occurs throughout the year. The reservoir operating rule is expected to be a reference in the multi-reservoir operation to obtain an optimal reservoir operating rule.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363478","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 : 2023-09-04DOI: 10.13170/aijst.12.2.33058
Indri Dayana, Habib Satria, Muhammad Muhammad Fauzi, Adi Rahwanto, Martha Rianna
Water is a natural resource with a very important function for human life and advancing general welfare, so water is the basic capital and the main development factor. After the eruption in the Mount Sinabung area, the supply of healthy water was inadequate both in quantity and quality, even though the Karo Regency government made efforts to provide this healthy water. For this reason, appropriate technology is needed in post-eruption water treatment in Mount Sinabung to become healthy water and be used by the local community. This research aims to provide information about Groundwater Conservation Technology in Facing Climate Change in the Disaster Areas of North Sumatra. The method used is quantitative with a purposive sampling technique by selecting 6 wells from 348 wells around Mount Sinabung. Chemical parameters for sampling each - each 1 liter of water to be put in bottles previously cleaned and rinsed with distilled water first, then dried. Laboratory Tests then examined them. There is a simple technology in the form of a water filter made from a mixture of sand, activated carbon, and dried starfruit leaves, which can neutralize contamination of substances such as sulfur and others in the water to obtain healthy water suitable for people in the disaster area.
{"title":"Simple Technology of Material Physics of Groundwater Conservation in Dealing with Climate Change in Disaster Areas of North Sumatra","authors":"Indri Dayana, Habib Satria, Muhammad Muhammad Fauzi, Adi Rahwanto, Martha Rianna","doi":"10.13170/aijst.12.2.33058","DOIUrl":"https://doi.org/10.13170/aijst.12.2.33058","url":null,"abstract":"Water is a natural resource with a very important function for human life and advancing general welfare, so water is the basic capital and the main development factor. After the eruption in the Mount Sinabung area, the supply of healthy water was inadequate both in quantity and quality, even though the Karo Regency government made efforts to provide this healthy water. For this reason, appropriate technology is needed in post-eruption water treatment in Mount Sinabung to become healthy water and be used by the local community. This research aims to provide information about Groundwater Conservation Technology in Facing Climate Change in the Disaster Areas of North Sumatra. The method used is quantitative with a purposive sampling technique by selecting 6 wells from 348 wells around Mount Sinabung. Chemical parameters for sampling each - each 1 liter of water to be put in bottles previously cleaned and rinsed with distilled water first, then dried. Laboratory Tests then examined them. There is a simple technology in the form of a water filter made from a mixture of sand, activated carbon, and dried starfruit leaves, which can neutralize contamination of substances such as sulfur and others in the water to obtain healthy water suitable for people in the disaster area.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135491426","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}
The business of sasirangan - the conventional texture of Banjar Tribe - has been one of the superb items of South Kalimantan. Sasirangan creation in the shading system utilizes many synthetic components containing weighty metals, and its waste possibly dirties the climate. One weighty metal squanders copper (Cu), poisonous to sea-going living beings and people. The treatment for sasirangan modern wastewater should be possible by an adsorption cycle that utilizations enacted carbon as an adsorbent. This study intends to decide the capacity of enacted carbon produced using rice husk to adsorb Cu from sasirangan fluid burn by dissecting the impact of contact time and adsorbent dose on the adsorption interaction. The bunch framework led the activity with substance and actual actuation. Synthetic initiation was finished by dousing the enacted carbon of rice husk with HCl answer for 24 hours. Simultaneously, actual enactment was done by consuming a heater at 500̊C for 2 hours. The adsorption treatment was given on sasirangan burn through examples with varieties in contact time (30, 60, and 120 minutes) and the adsorbent portion (2, 4, and 6 grams). The highest productivity of contained Cu decrease is 72.34% utilizing carbon with initiation. The ideal contact time expected in the adsorption cycle of weighty metal Cu in Sasirangan liquid waste is 120 minutes, with the ideal portion of 4 grams of actuated rice husk carbon adsorbent.
{"title":"Adsorptive Removal of Copper (Cu) in Sasirangan Liquid Waste by Utilization of Rice Husk as Activated Carbon","authors":"Isna Syauqiah, Desi Nurandini, Nopi Stiyati Prihatini, Jamiyaturrasyidah Jamiyaturrasyidah","doi":"10.13170/aijst.12.2.26431","DOIUrl":"https://doi.org/10.13170/aijst.12.2.26431","url":null,"abstract":"The business of sasirangan - the conventional texture of Banjar Tribe - has been one of the superb items of South Kalimantan. Sasirangan creation in the shading system utilizes many synthetic components containing weighty metals, and its waste possibly dirties the climate. One weighty metal squanders copper (Cu), poisonous to sea-going living beings and people. The treatment for sasirangan modern wastewater should be possible by an adsorption cycle that utilizations enacted carbon as an adsorbent. This study intends to decide the capacity of enacted carbon produced using rice husk to adsorb Cu from sasirangan fluid burn by dissecting the impact of contact time and adsorbent dose on the adsorption interaction. The bunch framework led the activity with substance and actual actuation. Synthetic initiation was finished by dousing the enacted carbon of rice husk with HCl answer for 24 hours. Simultaneously, actual enactment was done by consuming a heater at 500̊C for 2 hours. The adsorption treatment was given on sasirangan burn through examples with varieties in contact time (30, 60, and 120 minutes) and the adsorbent portion (2, 4, and 6 grams). The highest productivity of contained Cu decrease is 72.34% utilizing carbon with initiation. The ideal contact time expected in the adsorption cycle of weighty metal Cu in Sasirangan liquid waste is 120 minutes, with the ideal portion of 4 grams of actuated rice husk carbon adsorbent.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035295","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 : 2023-08-31DOI: 10.13170/aijst.12.2.32623
Farah Mutia, Dyah Erti Idawati, Ashfa Achmad
Coronavirus Disease 2019 (Covid-19), a highly contagious respiratory virus, has spread to more than 200 countries and regions. The high number of Covid-19 cases has led to various regulations regarding social restrictions. Some of the changes that occurred due to the Covid-19 pandemic changed the socio-spatial structure and affected physical and psychological well-being and overall quality of life. The impact of Covid-19 has also occurred in the Summarecon Bekasi settlement, which provides facilities, a commercial center, and various public open spaces that the people of Bekasi City widely use to become more restricted. Researchers used a qualitative approach and descriptive qualitative analysis techniques with interview observations and documentation as the data sources. Research on public open spaces in Summarecon Bekasi, including downtown walk, waterfront, pedestrian paths, and bus stop shuttle bus, shows that these public spaces cannot fulfill all variable indicators of public open space readiness in dealing with post-pandemic conditions Covid-19. The results obtained are based on the weighting of values from the results of observational studies and interviews on each variable indicator of public open spaces. The empirical mean value of public open spaces in Summarecon Bekasi is 89, which is still below the hypothetical mean value of 110 and is at the lower limit of the category 'Not Enough .'Thus, to overcome the condition of public open spaces that are not yet adaptive to Covid-19, a structuring model is designed for public open spaces in Summarecon Bekasi. This structuring model is expected to reduce the percentage probability of social disasters such as the Covid-19 pandemic or other similar things.
{"title":"Public Open Space Arrangement Model In Summarecon Bekasi Residential Area Based On Covid-19 Pandemic Mitigation","authors":"Farah Mutia, Dyah Erti Idawati, Ashfa Achmad","doi":"10.13170/aijst.12.2.32623","DOIUrl":"https://doi.org/10.13170/aijst.12.2.32623","url":null,"abstract":"Coronavirus Disease 2019 (Covid-19), a highly contagious respiratory virus, has spread to more than 200 countries and regions. The high number of Covid-19 cases has led to various regulations regarding social restrictions. Some of the changes that occurred due to the Covid-19 pandemic changed the socio-spatial structure and affected physical and psychological well-being and overall quality of life. The impact of Covid-19 has also occurred in the Summarecon Bekasi settlement, which provides facilities, a commercial center, and various public open spaces that the people of Bekasi City widely use to become more restricted. Researchers used a qualitative approach and descriptive qualitative analysis techniques with interview observations and documentation as the data sources. Research on public open spaces in Summarecon Bekasi, including downtown walk, waterfront, pedestrian paths, and bus stop shuttle bus, shows that these public spaces cannot fulfill all variable indicators of public open space readiness in dealing with post-pandemic conditions Covid-19. The results obtained are based on the weighting of values from the results of observational studies and interviews on each variable indicator of public open spaces. The empirical mean value of public open spaces in Summarecon Bekasi is 89, which is still below the hypothetical mean value of 110 and is at the lower limit of the category 'Not Enough .'Thus, to overcome the condition of public open spaces that are not yet adaptive to Covid-19, a structuring model is designed for public open spaces in Summarecon Bekasi. This structuring model is expected to reduce the percentage probability of social disasters such as the Covid-19 pandemic or other similar things.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035294","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}
Facies classification is the process of identifying rock lithology based on indirect measurements such as well log measurements. The facies classified manually by experienced geologists, so it takes a long time and is less efficient. Machine learning applications in facies classification can increase the effectiveness and efficiency of geophysical interpretation on complex data. The purpose of this study is to examine the application of machine learning algorithms SVM and KNN in facies estimation. The results showed that the KNN algorithm is better at estimating facies than the SVM algorithm.
{"title":"Comparison Of Facies Estimation Using Support Vector Machine (SVM) And K-Nearest Neighbor (KNN) Algorithm Based On Well Log Data","authors":"Urip Nurwijayanto Prabowo, Akmal Ferdiyan, Sukmaji Anom Raharjo, Sehah Sehah, Arya Dwi Candra","doi":"10.13170/aijst.12.2.28428","DOIUrl":"https://doi.org/10.13170/aijst.12.2.28428","url":null,"abstract":"Facies classification is the process of identifying rock lithology based on indirect measurements such as well log measurements. The facies classified manually by experienced geologists, so it takes a long time and is less efficient. Machine learning applications in facies classification can increase the effectiveness and efficiency of geophysical interpretation on complex data. The purpose of this study is to examine the application of machine learning algorithms SVM and KNN in facies estimation. The results showed that the KNN algorithm is better at estimating facies than the SVM algorithm.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136348758","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}
Deuterium is one of the isotopes of the hydrogen atom, which consists of 1 proton, 1 neutron, and 1 electron, also called a hydrogenic atom. The position of electrons in the atom cannot be determined with certainty because it is probabilistic. The probability of finding a deuterium atom electron in momentum space at quantum number n ≤ 3. This research aims to find the probability value of deuterium atomic electrons in momentum space at n ≤ 3. This research uses the mathematical theory study method through several stages, namely collecting the latest and relevant literature sources, making a simulation program, and then validating the simulation program with existing theory. If it has been validated, continue taking data that will be analyzed and then discussed in the results and discussion stage, and the last step is drawing conclusions. The results of this study show that the probability value for finding atomic electrons in momentum space will be more excellent with increasing integration limit values and the value of the principal quantum number (n).
{"title":"Probability of Deuterium Atom Electrons in Momentum Space at Quantum Numbers n ≤ 3","authors":"Bambang Supriadi, Sinthia Lolita Lorensia, Firda Shahira, Audri Mely Prabandari, Aurellya Abdillah Wijaya Putri","doi":"10.13170/aijst.12.2.32226","DOIUrl":"https://doi.org/10.13170/aijst.12.2.32226","url":null,"abstract":"Deuterium is one of the isotopes of the hydrogen atom, which consists of 1 proton, 1 neutron, and 1 electron, also called a hydrogenic atom. The position of electrons in the atom cannot be determined with certainty because it is probabilistic. The probability of finding a deuterium atom electron in momentum space at quantum number n ≤ 3. This research aims to find the probability value of deuterium atomic electrons in momentum space at n ≤ 3. This research uses the mathematical theory study method through several stages, namely collecting the latest and relevant literature sources, making a simulation program, and then validating the simulation program with existing theory. If it has been validated, continue taking data that will be analyzed and then discussed in the results and discussion stage, and the last step is drawing conclusions. The results of this study show that the probability value for finding atomic electrons in momentum space will be more excellent with increasing integration limit values and the value of the principal quantum number (n).","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135022617","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 : 2023-08-10DOI: 10.13170/aijst.12.2.30551
Amir Murtadha, Noer Fadhly, Muhammad Rusdi
The rapid development of the city of Banda Aceh occurred in general in the suburbs. The impact is the occurrence of propagation which is a complex urban phenomenon and difficult to measure. Policy makers need a simple method to control and evaluate urban spread. This study integrates the Shannon's Entropy model with remote sensing and GIS to analyze spreading patterns in each sub-district in Banda Aceh City based on two aspects of distance, namely the distance to the city center and the road network to describe urban spreading patterns. The application of the Shannon's Entropy method in Banda Aceh City in 2010-2020 can be seen in the Relative Entropy Matrix which shows that the linear propagation pattern (Quadrant C) is more dominant in Banda Raya District, Baiturrahman District, Kuta Raja District, Kuta Alam District, Lueng District Bata, and the District of Syiah Kuala. Whereas the spreading pattern of Meuraxa District and Jaya Baru District is in quadrant B, namely the elongated (Radial) type of propagation pattern, but in 2020 Jaya Baru District there has been a change in the propagation pattern, namely the linear propagation pattern. In the Ulee Kareng sub-district, there was a pattern of propagation changes in 2020 which was in quadrant D, namely the leapfrog development pattern from the previous year, namely 2010 and 2015 in quadrant C with a linear propagation pattern. The spreading pattern of Banda Aceh City tends to lead to the East. This is mostly caused by the shape of the land which is very suitable to be used as a built-up area
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