BERKALA SAINSTEK最新文献_第3页

The Coating of Mahogany Leaves Composite Using Clove Leaf Essential Oil as An Anti-Fungal Ganoderma lucidum 丁香叶精油抗真菌灵芝红木叶复合涂层研究

BERKALA SAINSTEK Pub Date : 2023-03-27 DOI: 10.19184/bst.v11i1.38066

M. Masturi, D. Alighiri, Ahmad Faisal Anwar, Fadhillah Choirunnisa, Kurnia Galuh Candra Kirana

引用次数: 0

Morphological Characteristic of Adult Armigeres subalbatus from Sumbersari Jember 浙江三月县信天翁成虫的形态特征

BERKALA SAINSTEK Pub Date : 2023-03-27 DOI: 10.19184/bst.v11i1.37098

Husnatun Nihayah, P. Purwatiningsih

{"title":"Morphological Characteristic of Adult Armigeres subalbatus from Sumbersari Jember","authors":"Husnatun Nihayah, P. Purwatiningsih","doi":"10.19184/bst.v11i1.37098","DOIUrl":"https://doi.org/10.19184/bst.v11i1.37098","url":null,"abstract":"Armigeres subalbatus is a type of mosquito that is widely distributed in the world, including Jember Regency, Indonesia. The larval natural habitat is mainly found in trees that can hold water, adult mosquitoes can be found indoors or outdoors. In the field of health, Ar. subalbatus acts as a vector for filariasis, Japanese Encephalitis (JE) and zika. This study aims to identify the morphological characteristics of the Ar. subalbatus from Sumbersari Village, Jember Regency. Although in Indonesia there is no significant evidence of the role of Ar. subalbatus in the health sector, it is important to detect the morphological features of Ar. subalbatus to be able to detect mosquitoes properly. Knowing the exact type of mosquito can provide consideration for appropriate mosquito control methods. The method used is through the installation of ovitrap in November 2022. The ovitrap media is in the form of tap water, the ovitrap is left for 8 days. Ar. mosquitoes were found in the larval stage of the ovitrap. The larvae were brought to the Jember University Faculty of Mathematics and Natural Sciences Zoology Laboratory for hatching and data collection on the morphological characteristics of mosquitoes. The results of this study include the morphological characteristics used for the identification of Ar. subalbatus which includes the shape of the proboscis, flagelomeres on the palps, color of the scutum, border of the scutum, size of the antepronotum, bands on the pleura, prespiracular and postspiracular areas, edges of the mesepimeron, abdomen (tergum, sterna), apex of the femur, venation of the wings, alula and upper calypter of the wings.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131452132","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}

引用次数: 0

Decision Support System Design and Development for Determine Graduate Phase of College Students with Naïve Bayes Algorithm Web-Based in Indonesia Institute of Business and Technology 基于web的Naïve贝叶斯算法确定大学生毕业阶段决策支持系统的设计与开发

BERKALA SAINSTEK Pub Date : 2023-03-27 DOI: 10.19184/bst.v11i1.33385

A. Adyana, Ayu Manik Dirgayusari, Nia Maharani, I. G. Andika, I. K. D. G. Supartha

{"title":"Decision Support System Design and Development for Determine Graduate Phase of College Students with Naïve Bayes Algorithm Web-Based in Indonesia Institute of Business and Technology","authors":"A. Adyana, Ayu Manik Dirgayusari, Nia Maharani, I. G. Andika, I. K. D. G. Supartha","doi":"10.19184/bst.v11i1.33385","DOIUrl":"https://doi.org/10.19184/bst.v11i1.33385","url":null,"abstract":"In the course of the lecture period, each student is different, various factors can affect the mental and academic achievement of students which have an impact on their graduation period. This things also impact on the campus of the Indonesian Institute of Business and Technology, until now there is no system that can determine the graduation period of students at the campus, therefore it is necessary to build a decision support system to determine the graduation period of students, especially students in the Informatics Engineering Study Program and Program Study of Computer Systems at the Indonesian Institute of Business and Technology (INSTIKI) using the Naïve Bayes algorithm that utilizes parameters, namely student academic data consisting of work status, Semester Achievement Index (IPS) scores semesters one untill four, and Grade Point Average (IPK). The system designed by using the GaussianNB library in python and website based. From the results of this study, the accuracy of the model made on the system produces an accuracy value of 87.5% with a dataset rule of 800 data and the data is divided and used as test data by 20%, while the accuracy value of classifying 250 test data on the system is 80.8%.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127845280","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}

引用次数: 0

Risk Analysis of the Causes of Delay in Ship Construction (Case Study of KM CL 9E Ship Construction) 船舶建造延误原因风险分析(以KM CL 9E船舶建造为例)

BERKALA SAINSTEK Pub Date : 2022-12-19 DOI: 10.19184/bst.v10i4.32674

Goldy Sandy Gazali, I. Baroroh

引用次数: 1

Green Open Spaces as Butterfly Refuge Habitat: Potential, Issues, and Management Strategies for Butterfly Conservation in Urban Areas 绿色开放空间作为蝴蝶的栖息地:城市蝴蝶保护的潜力、问题和管理策略

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.33123

Siva Devi Azahra, S. B. Rushayati, D. Destiana

{"title":"Green Open Spaces as Butterfly Refuge Habitat: Potential, Issues, and Management Strategies for Butterfly Conservation in Urban Areas","authors":"Siva Devi Azahra, S. B. Rushayati, D. Destiana","doi":"10.19184/bst.v10i4.33123","DOIUrl":"https://doi.org/10.19184/bst.v10i4.33123","url":null,"abstract":"One of the ecological functions of green open space (RTH) is to accommodate biodiversity in urban areas by providing a habitat for wild plants and animals. Pollution, urbanization, and various other environmental pressures make green open spaces in urban areas more susceptible to disturbances, both natural and due to human activities, which can affect the existence of biodiversity within them, including butterflies, which have specificity and sensitivity to certain environmental conditions, thus acting as bioindicators. Assessment of butterfly species, habitat conditions, and assistance with problems was carried out at four green open space locations in the East Jakarta Administrative City (DKI Jakarta Province) and four green open space locations in Pontianak City (West Borneo Province) to determine the potential and effectiveness of green open space as habitat protection for butterflies. The assessment was carried out by observing the presence of butterflies using the time search method and measuring the environmental factors that form the habitat and their correlation with the butterfly community through quantitative analysis. The results of the study showed that there were 22 species of butterflies in green open space in the East Jakarta Administrative City and 17 species of butterflies in green open space in Pontianak City. Correlation analysis at the eight green open space locations showed the same pattern, namely that the occurrence of butterfly species increased along with the number of forage plant species (as hosts or food plants) and canopy density (as shelter plants). The clustered shape of green open space is also a characteristic of green open space, which supports the function of green open space as a refuge habitat for butterflies in urban areas.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121392522","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}

引用次数: 2

Bending Strength of Apus Bamboo Fiber Reinforced Asphalt Composite Materials as Small Ship 小型船舶用Apus竹纤维增强沥青复合材料的抗弯强度

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.32604

E. Susanto, Y. Maheswara, Akhmad Basuki Widodo

{"title":"Bending Strength of Apus Bamboo Fiber Reinforced Asphalt Composite Materials as Small Ship","authors":"E. Susanto, Y. Maheswara, Akhmad Basuki Widodo","doi":"10.19184/bst.v10i4.32604","DOIUrl":"https://doi.org/10.19184/bst.v10i4.32604","url":null,"abstract":"Bamboo is generally widely used as a material or construction material in homes. However, the use of bamboo as a raw material for shipbuilding is not yet available. To make bamboo as a material in shipbuilding, the bamboo is assembled or made into a composite to meet class standards as a material for shipbuilding. In this study, the composites used were apus bamboo fiber and asphalt. The method of making the composite uses the hand lay-up method with variations of 1 layer of reinforcement, 3 layers of reinforcement, and 5 layers of reinforcement. The dimensions of the test specimen size refer to ASTM D 790-3 which is then carried out by bending tests to determine the strength of the material due to loading and the elasticity of the material. Furthermore, the results of the bending test will be analyzed using the Anova method and compared with the standard material class in ship construction. Results Asphalt composite material with apus bamboo fiber has the highest bending test value of 27,068 Mpa and the lowest bending test value of 25,998 Mpa. Based on these results, it is stated that the Bamboo reinforced asphalt (BRA) material has not been able to match and even exceed the Bamboo reinforced plastic (BRP) material in the woven, non-woven and random fiber variants. It is influenced by the diameter, and the strength of the shape between the fiber and the matrix.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131784352","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}

引用次数: 0

Implementation of K-Means Clustering Method for Trend Analysis of Thesis Topics (Case Study: Faculty of Computer Science, University of Jember) k -均值聚类方法在论文主题趋势分析中的实现(以浙江大学计算机科学学院为例)

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.29524

M. Irianto, Achmad Maududie, Fajrin Nurman Arifin

{"title":"Implementation of K-Means Clustering Method for Trend Analysis of Thesis Topics (Case Study: Faculty of Computer Science, University of Jember)","authors":"M. Irianto, Achmad Maududie, Fajrin Nurman Arifin","doi":"10.19184/bst.v10i4.29524","DOIUrl":"https://doi.org/10.19184/bst.v10i4.29524","url":null,"abstract":"The development of information technology causes a large number of digital documents, especially thesis documents, so that it can create opportunities for students to take the same and not varied topics. Thesis documents can be grouped by topic by identifying the abstract section. The results of the grouping can be seen with the trend with data visualization so that it can be analyzed to find out the trend of each topic. Retrieval of data in the repository of the University of Jember through a web scraping process as many as 490 thesis documents for students of the Faculty of Computer Science, University of Jember. The preprocessing stage is carried out by text mining methods which include cleaning, filtering, stemming, and tokenizing. Then calculate the weight of each word with the Term Frequency - Inverse Document Frequency algorithm, followed by the dimension reduction process using the Principal Component Analysis algorithm, which is normalized by Z-Score first. The outliers removal process is carried out before classifying documents. Furthermore, document grouping uses the K-Means Clustering method with Cosine Similarity as the distance calculation and the Silhouette Coefficient algorithm as a test. The test results were carried out with various k values and the optimal value was obtained at k = 2 with a Silhouette value of 0.80. Then the topic detection uses the Latent Dirichlet Allocation algorithm for each cluster that has been formed. Each cluster is visualized with a line chart and Trend Linear algorithm and analyzed to find out the trend. From the results of the analysis, it can be concluded that the topic of Decision Support System Development is trending down, and the topic of IT Performance Measurement and Forecasting is trending up. It can be concluded that the topic of Decision Support System Development needs to be reduced so that other topics can emerge.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124196795","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}

引用次数: 1

Effect of Nozzle Tip’s Variation to The Duration and OXY-LPG Gas Consumptions Using Manual CuttingMethods in Shipyards 船坞人工切割时喷嘴尖端变化对持续时间和氧-液化石油气耗量的影响

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.32389

Zahro Wanda Mardhotillah, T. A. Kristiyono, Bagus Aditya

引用次数: 0

Hazards Identification and Risk Assessment In Welding Confined Space Ship Reparation PT. X With Job Safety Analysis Method 基于作业安全分析法的密闭空间船舶修理PT. X焊接危险识别与风险评估

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.32669

Muchammad Aunur Rofiq, A. Azhar

{"title":"Hazards Identification and Risk Assessment In Welding Confined Space Ship Reparation PT. X With Job Safety Analysis Method","authors":"Muchammad Aunur Rofiq, A. Azhar","doi":"10.19184/bst.v10i4.32669","DOIUrl":"https://doi.org/10.19184/bst.v10i4.32669","url":null,"abstract":"PT X is a docking and shipyard company with experience in repairing various types of ships. Dangers and risks are always exist in every job including ship repair. Therefore, it is necessary to identify hazards and risk assessments. Welding in a confined space includes work that is a source of danger that has the potential to threaten the lives of workers in the ship repair process because access to and exit is limited and is not made to be a continuous work place. The purpose of this study is to identify hazards and assess risks in PT X ship repair confined space welding. The method used in hazard identification and risk control is Job Safety Analysis (JSA) with direct field observations and calculation of likelihood, concequences, and risk values. score on risk assessment according to AS/NZS 4360:2004 and with expert judgment. The results of this study identified that there were 49 potential hazards, then a risk assessment was carried out and there were 36 risks at low risk levels and 13 risks at moderate risk levels. The recommendations given include: using PPE and suction blowers when working, not entering the tank before it is declared safe, taking safety briefings seriously and worker absenteeism, tidying up cables and placing them in a safe position, ensuring workers' hands are dry when in contact with electricity, paying attention to attitude working conditions and conditions around the work area to always be alert","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129589121","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}

引用次数: 2

Performance of Ceramic Membrane Modified with Corncob Activated Carbon for Efficient Remazol Red Removal in Batik Wastewater 玉米芯活性炭改性陶瓷膜对蜡染废水中雷马唑红的高效去除性能研究

BERKALA SAINSTEK Pub Date : 2022-12-10 DOI: 10.19184/bst.v10i4.34941

Muhammad Malik Firdaus Ardiyanto, Maya Rahmayanti

{"title":"Performance of Ceramic Membrane Modified with Corncob Activated Carbon for Efficient Remazol Red Removal in Batik Wastewater","authors":"Muhammad Malik Firdaus Ardiyanto, Maya Rahmayanti","doi":"10.19184/bst.v10i4.34941","DOIUrl":"https://doi.org/10.19184/bst.v10i4.34941","url":null,"abstract":"A ceramic membrane modified with corncob activated carbon (CMCC) has been successfully prepared and used to reduce the concentration of remazol red in batik wastewater. This research aims to study the effect of corncob activated carbon (CC) in the ceramic membrane on the porosity of the ceramic membrane and its ability to reduce the concentration of remazol red dye in batik wastewater. The variation of % CC to the mass of clay used was 0%, 5%, 10%, 15%, 20%, and 25%. Characterization of CC includes ash content and characterization of CMCC includes porosity test, morphological analysis, and elemental distribution based on SEM-EDX. The results showed that the ash content of CC before and after activation was 5.625% and 2.974%, respectively. The CMCC porosity test results showed that the more CC added, the greater the porosity of the ceramic membrane. The elemental composition in CMCC is dominated by O, Si, Al and C. The addition of 10% CC obtained the optimum composition on a ceramic membrane. % removal of remazol red is 83.9%. The COD values of batik wastewater before and after processing with CMCC were 484.286 and 26,339 mg/L, respectively.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"41 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114007309","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}

引用次数: 0