Pub Date : 2024-01-30DOI: 10.24853/jurtek.16.1.83-94
Defi Milenia Putri Wesha, D. Rimantho
As a country with a population of 261,115,456 people, Indonesia produces 65 million tons of waste per year. This large amount of waste is not matched by good waste management. Improving waste management must be done from the source, one of which is the XYZ boarding school. Thus, this study aims to determine the waste management strategy to improve waste management at the XYZ Islamic Boarding School. The determination of the process was carried out using the SWOT and Promethee methods. Based on the SWOT analysis results, alternative waste management strategies that can be implemented at the XYZ Islamic Boarding School are known. Furthermore, these alternatives are analyzed again to determine which options will be prioritized using the Promethee method. The results show that XYZ Islamic Boarding School can implement the SO strategy with a value of 4,830, and the priority strategies are conducting waste management training by trainers or teachers to employees of the boarding school, building waste management facilities in the boarding school area, and building good cooperation with waste management institutions.
{"title":"Analysis of Proposed Waste Management Strategies at XYZ Islamic Boarding School Using SWOT and Promethee","authors":"Defi Milenia Putri Wesha, D. Rimantho","doi":"10.24853/jurtek.16.1.83-94","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.83-94","url":null,"abstract":"As a country with a population of 261,115,456 people, Indonesia produces 65 million tons of waste per year. This large amount of waste is not matched by good waste management. Improving waste management must be done from the source, one of which is the XYZ boarding school. Thus, this study aims to determine the waste management strategy to improve waste management at the XYZ Islamic Boarding School. The determination of the process was carried out using the SWOT and Promethee methods. Based on the SWOT analysis results, alternative waste management strategies that can be implemented at the XYZ Islamic Boarding School are known. Furthermore, these alternatives are analyzed again to determine which options will be prioritized using the Promethee method. The results show that XYZ Islamic Boarding School can implement the SO strategy with a value of 4,830, and the priority strategies are conducting waste management training by trainers or teachers to employees of the boarding school, building waste management facilities in the boarding school area, and building good cooperation with waste management institutions.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140481662","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.105-116
Edo Septiansyah, R. Purnaini, M. M. Danial
The community in Sungai Itik Village and its vicinity use river water for their daily needs, such as irrigation for agriculture, fish ponds, washing, bathing, and more. The quality of the river water has an iron (Fe) content of 2,64 mg/L, Total Dissolved Oxygen (TDS) of 347 mg/L, Dissolved Oxygen (DO) of 4,7 mg/L, a temperature of 29°C, and a pH of 5,4. The iron (Fe) content exceeds the standards set by PerMenKes No. 32 of 2017, requiring treatment using a multiple-tray aerator. This study aimed to determine the effective distance and number of trays in treating Sungai Itik's raw water, understand the coefficient of gas transfer (KLa) in the aeration process, and find the optimum aeration time. This study employed a multiple-tray aerator consisting of 5 trays with variations in the tray distances at 30 cm, 40 cm, 50 cm, and 60 cm. Three repetitions were performed for each treatment, both without gravel and with gravel. The results of this study showed that the best reduction in Fe content was achieved by the treatment with gravel at a tray distance of 60 cm using 5 trays, resulting in a 6,64% reduction in Fe from an average value of 1,51 mg/L to 1,41 mg/L. The average pH value was 6,19, and the TDS was 890 mg/L. The highest oxygen transfer rate (KLa) was obtained at a tray distance of 60 cm with gravel, averaging 0,2857/minute, and the optimum aeration time was 10 minutes.
{"title":"Effectivity Of Multi Tray Aerator As Pretreatment Process For Reverse Osmosis Membrane To Utilized As Raw Water At Sungai Itik Village","authors":"Edo Septiansyah, R. Purnaini, M. M. Danial","doi":"10.24853/jurtek.16.1.105-116","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.105-116","url":null,"abstract":"The community in Sungai Itik Village and its vicinity use river water for their daily needs, such as irrigation for agriculture, fish ponds, washing, bathing, and more. The quality of the river water has an iron (Fe) content of 2,64 mg/L, Total Dissolved Oxygen (TDS) of 347 mg/L, Dissolved Oxygen (DO) of 4,7 mg/L, a temperature of 29°C, and a pH of 5,4. The iron (Fe) content exceeds the standards set by PerMenKes No. 32 of 2017, requiring treatment using a multiple-tray aerator. This study aimed to determine the effective distance and number of trays in treating Sungai Itik's raw water, understand the coefficient of gas transfer (KLa) in the aeration process, and find the optimum aeration time. This study employed a multiple-tray aerator consisting of 5 trays with variations in the tray distances at 30 cm, 40 cm, 50 cm, and 60 cm. Three repetitions were performed for each treatment, both without gravel and with gravel. The results of this study showed that the best reduction in Fe content was achieved by the treatment with gravel at a tray distance of 60 cm using 5 trays, resulting in a 6,64% reduction in Fe from an average value of 1,51 mg/L to 1,41 mg/L. The average pH value was 6,19, and the TDS was 890 mg/L. The highest oxygen transfer rate (KLa) was obtained at a tray distance of 60 cm with gravel, averaging 0,2857/minute, and the optimum aeration time was 10 minutes.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"40 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140481731","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}
A thermoacoustic engine is a engine that converts thermal energy into acoustic energy, which can be used to generate electricity or cooling. This engine is attractive because it consists only of a stack, heat exchangers, and a resonator. The stack serves as the primary component for the energy conversion process and consists of porous materials like an array of stainless steel mesh screens. To generate the acoustic energy, a minimum temperature difference is necessary between the two sides of the stack, called the onset temperature difference. However, the calculation for prediction of onset temperature on the stack made of mesh screen has not been addressed. Therefore, the objective of this paper is to propose a method that can be used to estimate the onset temperature difference in standing wave thermoacoustic engine with stacks made of mesh screen arrays. The onset temperature difference is predicted numerically using linear stability theory and matrix transfer methods. Experimental verification is carried out by using standing wave thermoacoustic engine from pervious study. The results showed that the lowest onset temperature difference (TH - TC = 140ºC) is obtained when rh = 0.497 mm. Furthermore, the numerical and experimental onset temperature difference comparisons show a qualitative agreement, allowing the onset temperature prediction method to be used in designing standing wave thermoacoustic engines with stacks made of mesh screens.
热声发动机是一种将热能转化为声能的发动机，可用于发电或制冷。这种发动机之所以吸引人，是因为它只由堆栈、热交换器和谐振器组成。烟囱是能量转换过程的主要部件，由多孔材料（如不锈钢网筛阵列）组成。要产生声能，烟囱两侧必须有一个最小温差，即起始温差。然而，由网屏制成的烟囱的起始温度预测计算尚未得到解决。因此，本文的目的是提出一种方法，用于估算驻波热声发动机的起始温差。利用线性稳定性理论和矩阵转移方法对起始温差进行了数值预测。实验验证采用了先前研究中的驻波热声发动机。结果表明，当 rh = 0.497 mm 时，起始温差（TH - TC = 140ºC）最小。此外，数值和实验起始温差比较显示出定性一致，因此起始温差预测方法可用于设计带有网筛堆栈的驻波热声发动机。
{"title":"Prediction of Onset Temperature in Standing Wave Thermoacoustic Engine with Mesh Screen Stack","authors":"Prastowo Murti, Wijayanti Dwi Astuti, I. Setiawan, Fakih Irsyadi, Imroatul Hudati","doi":"10.24853/jurtek.16.1.27-32","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.27-32","url":null,"abstract":"A thermoacoustic engine is a engine that converts thermal energy into acoustic energy, which can be used to generate electricity or cooling. This engine is attractive because it consists only of a stack, heat exchangers, and a resonator. The stack serves as the primary component for the energy conversion process and consists of porous materials like an array of stainless steel mesh screens. To generate the acoustic energy, a minimum temperature difference is necessary between the two sides of the stack, called the onset temperature difference. However, the calculation for prediction of onset temperature on the stack made of mesh screen has not been addressed. Therefore, the objective of this paper is to propose a method that can be used to estimate the onset temperature difference in standing wave thermoacoustic engine with stacks made of mesh screen arrays. The onset temperature difference is predicted numerically using linear stability theory and matrix transfer methods. Experimental verification is carried out by using standing wave thermoacoustic engine from pervious study. The results showed that the lowest onset temperature difference (TH - TC = 140ºC) is obtained when rh = 0.497 mm. Furthermore, the numerical and experimental onset temperature difference comparisons show a qualitative agreement, allowing the onset temperature prediction method to be used in designing standing wave thermoacoustic engines with stacks made of mesh screens.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"183 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484333","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.95-104
Juwitaning Sekar Kinanti, Dewi Kurniasih, Aulia Nadia Rachmat
Sick Building Syndrome is a combination of health problems that a human feels only when doing activities inside a building. This situation is due to various factors, such as ergonomic factors and a work environment that is not in accordance with applicable regulations. The office building of the Port Service Company has poor building conditions, such as a poor ventilation system, some work facilities that are not ergonomic, and the physical environment of lighting and work climate that is not up to standard. This study was conducted to determine the general description of the incidence of SBS in the office building of the Port Services Company and to determine the effect of work posture and work environment on SBS complaints. The statistical method used in this study is binary logistic regression test. The results of statistical testing showed that work posture (p-value=0.018) and lighting (p-value=0.027) had an effect on sick building syndrome.
病态楼宇综合症是指人只有在楼宇内活动时才会感觉到的一系列健康问题。造成这种情况的原因是多方面的，如人体工程学因素和工作环境不符合相关规定。港务公司办公楼的建筑条件较差，如通风系统不佳，一些工作设施不符合人体工程学，照明和工作气候等物理环境不达标。本研究旨在确定港口服务公司办公楼 SBS 发生率的一般描述，并确定工作姿势和工作环境对 SBS 投诉的影响。本研究采用的统计方法是二元逻辑回归检验。统计检验结果显示，工作姿势（p 值=0.018）和照明（p 值=0.027）对病态楼宇综合症有影响。
{"title":"The Influence of Work Posture and Work Environment on Sick Building Syndrome in Port Service Company Employees","authors":"Juwitaning Sekar Kinanti, Dewi Kurniasih, Aulia Nadia Rachmat","doi":"10.24853/jurtek.16.1.95-104","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.95-104","url":null,"abstract":"Sick Building Syndrome is a combination of health problems that a human feels only when doing activities inside a building. This situation is due to various factors, such as ergonomic factors and a work environment that is not in accordance with applicable regulations. The office building of the Port Service Company has poor building conditions, such as a poor ventilation system, some work facilities that are not ergonomic, and the physical environment of lighting and work climate that is not up to standard. This study was conducted to determine the general description of the incidence of SBS in the office building of the Port Services Company and to determine the effect of work posture and work environment on SBS complaints. The statistical method used in this study is binary logistic regression test. The results of statistical testing showed that work posture (p-value=0.018) and lighting (p-value=0.027) had an effect on sick building syndrome.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"366 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140483057","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 : 2024-01-30DOI: 10.24853/jurtek.16.1.117-126
W. Fathonah, E. Mina, R. I. Kusuma, Fahreza Ramdani
Soil is one of the critical factors influencing construction robustness. The land situated in Cibingbin Village, Cibaliung District, Pandeglang Regency, falls under the category of soil with low bearing capacity. Therefore, the soil in this area requires stabilization to enhance its load-bearing capacity. The field's CBR value, determined through DCP testing, was found to be 2.67%. The target CBR value for subgrade suitability is 6%, indicating the necessity for soil stabilization at this location. This study aims to assess the physical characteristics of the native soil and its CBR value after stabilization using sengon wood ash. Various percentages of sengon wood ash, namely 4%, 6%, 8%, 10%, and 12%, were utilized with curing periods of 0 and 3 days. Soil classification was performed using the USCS method, and the CBR test conducted was the unsoaked CBR test. The results revealed that the addition of 4% sengon wood ash, with a 3-day curing period, yielded an optimum CBR value of 7%. Sengon wood waste ash proved effective in increasing the CBR value. Furthermore, the use of sengon wood ash did not significantly reduce the plasticity index (PI) value. After stabilization with sengon wood ash, the PI value remained at 35.685%, categorizing it as highly plastic. Additional research is recommended to address the limitations of sengon wood ash and achieve a significant reduction in the PI value to meet the subgrade criteria
{"title":"Utilization of Sengon Wood Ash for Soil Stabilization and Its Impact on Unsoaked CBR Value","authors":"W. Fathonah, E. Mina, R. I. Kusuma, Fahreza Ramdani","doi":"10.24853/jurtek.16.1.117-126","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.117-126","url":null,"abstract":"Soil is one of the critical factors influencing construction robustness. The land situated in Cibingbin Village, Cibaliung District, Pandeglang Regency, falls under the category of soil with low bearing capacity. Therefore, the soil in this area requires stabilization to enhance its load-bearing capacity. The field's CBR value, determined through DCP testing, was found to be 2.67%. The target CBR value for subgrade suitability is 6%, indicating the necessity for soil stabilization at this location. This study aims to assess the physical characteristics of the native soil and its CBR value after stabilization using sengon wood ash. Various percentages of sengon wood ash, namely 4%, 6%, 8%, 10%, and 12%, were utilized with curing periods of 0 and 3 days. Soil classification was performed using the USCS method, and the CBR test conducted was the unsoaked CBR test. The results revealed that the addition of 4% sengon wood ash, with a 3-day curing period, yielded an optimum CBR value of 7%. Sengon wood waste ash proved effective in increasing the CBR value. Furthermore, the use of sengon wood ash did not significantly reduce the plasticity index (PI) value. After stabilization with sengon wood ash, the PI value remained at 35.685%, categorizing it as highly plastic. Additional research is recommended to address the limitations of sengon wood ash and achieve a significant reduction in the PI value to meet the subgrade criteria","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"134 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140480602","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 study describes the implementation of the Internet of Things using the MQTT protocol and mosquitto as a broker combined with a 2x16 LCD for a pH monitoring system in a freshwater fish farming system at BPBIAT Purwakarta, West Java, Indonesia. To obtain accurate data, the calibration process is carried out in several stages, including using buffer 6.8 and distilled water. The calibration results on the 6.8 buffered liquid sample mean that the data obtained are appropriate, while the aquades obtained a value of 7.73, this is due to the storage factor of the distilled water so that it can change the pH value. The final result of the research shows that the data that appears online on the Node-Red dashboard is the same as that which appears locally on the 2x16 LCD. This means the MQTT protocol is working fine. The data displayed on the Node-Red UI is sent periodically every 30 minutes. The consideration is that, during the experiments, the pH value of the water did not change significantly beyond the range of 6.5-8.5. This data illustrates that the pH quality of the water for freshwater fish farming at BPBIAT is ideal for use.
{"title":"IoT Platform for Monitoring Systems Water pH in the Freshwater Fish Cultivation Process","authors":"Deni Kurnia, Slamet Riyadi, Deshinta Arrova Dewi, Adolf Asih Suprianto, Olivia Rahmadani","doi":"10.24853/jurtek.16.1.11-16","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.11-16","url":null,"abstract":"This study describes the implementation of the Internet of Things using the MQTT protocol and mosquitto as a broker combined with a 2x16 LCD for a pH monitoring system in a freshwater fish farming system at BPBIAT Purwakarta, West Java, Indonesia. To obtain accurate data, the calibration process is carried out in several stages, including using buffer 6.8 and distilled water. The calibration results on the 6.8 buffered liquid sample mean that the data obtained are appropriate, while the aquades obtained a value of 7.73, this is due to the storage factor of the distilled water so that it can change the pH value. The final result of the research shows that the data that appears online on the Node-Red dashboard is the same as that which appears locally on the 2x16 LCD. This means the MQTT protocol is working fine. The data displayed on the Node-Red UI is sent periodically every 30 minutes. The consideration is that, during the experiments, the pH value of the water did not change significantly beyond the range of 6.5-8.5. This data illustrates that the pH quality of the water for freshwater fish farming at BPBIAT is ideal for use. ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484451","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 : 2024-01-29DOI: 10.24853/jurtek.16.1.137-152
Singgih Juniawan, C. Jaqin, Herry Agung Prabowo, Uti Roysen, Fachrul Alam, Daruki Daruki
Aircraft maintenance in remote locations is a prevalent challenge for local airlines in Indonesia, leading to diminished productivity and efficiency in the maintenance division. This issue is substantiated by a significant incidence rate of 36% annually, as reported by a national airline. The current solution needed is the improvement of the Maintenance System to eliminate off-hangar maintenance for Narrow Body aircraft in the national aviation service industry. This study aims to identify the causal factors of aircraft requiring maintenance when located outside the primary maintenance facilities and to reduce these occurrences. The Reliability Centered Maintenance (RCM) method is employed to determine the most effective maintenance approach based on system and equipment reliability, and the fuzzy logic method in FMEA is utilized to address ambiguity and uncertainty in risk assessment. Primary data were obtained from Focus Group Discussions (FGD) with experts working in the airline industry. Secondary data were collected from all aircraft experiencing breakdowns outside the main hangar. The findings reveal that the primary factor for maintenance outside the main facilities is the current maintenance policy of Finding Failure (FF), which leads to unpredictable maintenance activities, resulting in damage outside the main facility areas (Batam, Cengkareng, and Surabaya). Incidents of maintenance outside the main facilities can be eliminated by shifting the policy to Time Directed (TD), enabling the company to reduce costs from an initial IDR 342,681,011,118.60 to IDR 70,370,514,198.60, achieving a cost saving of 79.47%.
{"title":"Implementation of Reliability Centered Maintenance (RCM) with Fuzzy Logic in Eliminating Off-Hangar Maintenance on Narrow Body Aircraft","authors":"Singgih Juniawan, C. Jaqin, Herry Agung Prabowo, Uti Roysen, Fachrul Alam, Daruki Daruki","doi":"10.24853/jurtek.16.1.137-152","DOIUrl":"https://doi.org/10.24853/jurtek.16.1.137-152","url":null,"abstract":"Aircraft maintenance in remote locations is a prevalent challenge for local airlines in Indonesia, leading to diminished productivity and efficiency in the maintenance division. This issue is substantiated by a significant incidence rate of 36% annually, as reported by a national airline. The current solution needed is the improvement of the Maintenance System to eliminate off-hangar maintenance for Narrow Body aircraft in the national aviation service industry. This study aims to identify the causal factors of aircraft requiring maintenance when located outside the primary maintenance facilities and to reduce these occurrences. The Reliability Centered Maintenance (RCM) method is employed to determine the most effective maintenance approach based on system and equipment reliability, and the fuzzy logic method in FMEA is utilized to address ambiguity and uncertainty in risk assessment. Primary data were obtained from Focus Group Discussions (FGD) with experts working in the airline industry. Secondary data were collected from all aircraft experiencing breakdowns outside the main hangar. The findings reveal that the primary factor for maintenance outside the main facilities is the current maintenance policy of Finding Failure (FF), which leads to unpredictable maintenance activities, resulting in damage outside the main facility areas (Batam, Cengkareng, and Surabaya). Incidents of maintenance outside the main facilities can be eliminated by shifting the policy to Time Directed (TD), enabling the company to reduce costs from an initial IDR 342,681,011,118.60 to IDR 70,370,514,198.60, achieving a cost saving of 79.47%.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140489634","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 : 2024-01-16DOI: 10.11113/jurnalteknologi.v86.20508
Mohd Taufiq Mat Jalil, Mohd Fakharul Zaman RAJA YAHYA, Nurul Aili Zakaria, Darah Ibrahim
Endophytic fungi of the medicinal herb, Ocimum sanctum are believed to possess antifungal activity against pathogenic fungi. Due to the emergence of pathogenic fungi and antibiotic-resistant strains, the search for alternative antimicrobial agents is a need. The present study aimed to evaluate the antifungal activity of endophytic fungi isolated from O. sanctum. Plate-to-plate method, disk diffusion assay, and Scanning electron microscopic (SEM) were employed in this study. The finding revealed that fungal isolates Colletotrichum sp. IBRL OS-39, Aspergillus sp. IBRL OS-65, Muscodor sp. IBRL OS-94 and Muscodor sp. IBRL OS-98 was able to produce volatile compounds with antifungal activity against pathogenic fungi. On the disk diffusion assay, Lasiodiplodia sp. IBRL OS-64, and Muscodor sp. IBRL OS-94 displayed good antifungal activity against test fungi with a diameter of inhibition zone between 9.6±0.6 - 14.3±0.6 mm and 11.2±1.2 - 15.7±0.6 mm, respectively. SEM observations revealed remarkable morphological changes in Candida albicans treated with the dichloromethane extracts of Lasiodiplodia sp. IBRL OS-64 and Muscodor sp. IBRL OS-94 with severe cell damage beyond repair and thus leads to cell death.
{"title":"ANTIFUNGAL ACTIVITY OF ENDOPHYTIC FUNGI ASSOCIATED WITH OCIMUM SANCTUM","authors":"Mohd Taufiq Mat Jalil, Mohd Fakharul Zaman RAJA YAHYA, Nurul Aili Zakaria, Darah Ibrahim","doi":"10.11113/jurnalteknologi.v86.20508","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20508","url":null,"abstract":"Endophytic fungi of the medicinal herb, Ocimum sanctum are believed to possess antifungal activity against pathogenic fungi. Due to the emergence of pathogenic fungi and antibiotic-resistant strains, the search for alternative antimicrobial agents is a need. The present study aimed to evaluate the antifungal activity of endophytic fungi isolated from O. sanctum. Plate-to-plate method, disk diffusion assay, and Scanning electron microscopic (SEM) were employed in this study. The finding revealed that fungal isolates Colletotrichum sp. IBRL OS-39, Aspergillus sp. IBRL OS-65, Muscodor sp. IBRL OS-94 and Muscodor sp. IBRL OS-98 was able to produce volatile compounds with antifungal activity against pathogenic fungi. On the disk diffusion assay, Lasiodiplodia sp. IBRL OS-64, and Muscodor sp. IBRL OS-94 displayed good antifungal activity against test fungi with a diameter of inhibition zone between 9.6±0.6 - 14.3±0.6 mm and 11.2±1.2 - 15.7±0.6 mm, respectively. SEM observations revealed remarkable morphological changes in Candida albicans treated with the dichloromethane extracts of Lasiodiplodia sp. IBRL OS-64 and Muscodor sp. IBRL OS-94 with severe cell damage beyond repair and thus leads to cell death.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"7 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506689","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 : 2024-01-16DOI: 10.11113/jurnalteknologi.v86.20186
Z. H. Mohd Juffry, Kamarulzaman Kamarudin, Abdul Hamid Adom, M. F. Miskon, A. S. Ali Yeon, Abdulnasser Nabil Abdullah
The incident of harmful gas leakage can cause severe damage to the environment and several casualties to human beings while the gas localization system plays a major role in mitigating those causalities. With the advances in artificial intelligence technology, deep learning is able to enhance the accuracy of the gas localization system to locate the gas source. This paper proposes a gas localization system that utilizes three different deep learning models namely DNN, 1DCNN, and 2DCNN to locate the gas source within the gas map. The proposed method involves generating the gas distribution map through the large gas sensor array platform in real-world indoor scenarios. Those models are then trained using the collected database which allows for accurate prediction of the gas source location. The performance of each proposed deep learning model was compared to find the best model demonstrating the highest effectiveness in identifying gas leaks. The study has shown that the 1DCNN has the highest effectiveness in predicting the gas source in the range between 0.0 m to 0.3 m with 90.3% compared to the DNN and 2DCNN models.
{"title":"GAS SOURCE LOCALIZATION THROUGH DEEP LEARNING METHOD BASED ON GAS DISTRIBUTION MAP DATABASE","authors":"Z. H. Mohd Juffry, Kamarulzaman Kamarudin, Abdul Hamid Adom, M. F. Miskon, A. S. Ali Yeon, Abdulnasser Nabil Abdullah","doi":"10.11113/jurnalteknologi.v86.20186","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20186","url":null,"abstract":"The incident of harmful gas leakage can cause severe damage to the environment and several casualties to human beings while the gas localization system plays a major role in mitigating those causalities. With the advances in artificial intelligence technology, deep learning is able to enhance the accuracy of the gas localization system to locate the gas source. This paper proposes a gas localization system that utilizes three different deep learning models namely DNN, 1DCNN, and 2DCNN to locate the gas source within the gas map. The proposed method involves generating the gas distribution map through the large gas sensor array platform in real-world indoor scenarios. Those models are then trained using the collected database which allows for accurate prediction of the gas source location. The performance of each proposed deep learning model was compared to find the best model demonstrating the highest effectiveness in identifying gas leaks. The study has shown that the 1DCNN has the highest effectiveness in predicting the gas source in the range between 0.0 m to 0.3 m with 90.3% compared to the DNN and 2DCNN models.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"65 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505655","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 : 2024-01-16DOI: 10.11113/jurnalteknologi.v86.20667
Z. Salleh, M. A. A. Zullastri
Pine wood sourced from pellet packaging, being abundant, holds potential for utilization in creating bio composites, particularly as activated carbon for laminated coatings in structural applications. However, there is a current lack of research identifying its specific properties as a coating material for Fiber Reinforced Polymer (FRP) composites. Fiber Reinforced Polymer (FRP) composites provide a highly adaptable solution for reinforcing and revitalizing existing structures in challenging marine conditions. This study delves into investigating the flexural characteristics of FRP pine wood composites, comparing the findings with Finite Element Analysis (FEA) results. Furthermore, the activated carbon derived from pine wood exhibits potential for resisting barnacle attachment when immersed in saltwater. For the flexural analysis, samples were produced using a silicone rubber mold, incorporating varying weight percentages (wt.%) of activated FRP pine wood, ranging from 2 wt.% to 10 wt.%. The outcomes of the study reveal that the introduction of activated carbon from pine wood leads to an enhancement in ultimate strength, reaching a maximum of 2700 MPa. Nonetheless, the results also indicate a reduction in material strength as the proportion of activated carbon pine wood is increased.
{"title":"COMPARISON OF FLEXURAL PROPERTIES OF PINEWOOD WITH FEA SIMULATION FOR MARINE APPLICATION","authors":"Z. Salleh, M. A. A. Zullastri","doi":"10.11113/jurnalteknologi.v86.20667","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20667","url":null,"abstract":"\u0000\u0000\u0000\u0000Pine wood sourced from pellet packaging, being abundant, holds potential for utilization in creating bio composites, particularly as activated carbon for laminated coatings in structural applications. However, there is a current lack of research identifying its specific properties as a coating material for Fiber Reinforced Polymer (FRP) composites. Fiber Reinforced Polymer (FRP) composites provide a highly adaptable solution for reinforcing and revitalizing existing structures in challenging marine conditions. This study delves into investigating the flexural characteristics of FRP pine wood composites, comparing the findings with Finite Element Analysis (FEA) results. Furthermore, the activated carbon derived from pine wood exhibits potential for resisting barnacle attachment when immersed in saltwater. For the flexural analysis, samples were produced using a silicone rubber mold, incorporating varying weight percentages (wt.%) of activated FRP pine wood, ranging from 2 wt.% to 10 wt.%. The outcomes of the study reveal that the introduction of activated carbon from pine wood leads to an enhancement in ultimate strength, reaching a maximum of 2700 MPa. Nonetheless, the results also indicate a reduction in material strength as the proportion of activated carbon pine wood is increased.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506508","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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