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The Impact of B/D Ratio on the Technical Performance of Outrigger Fishing Vessels at PPN Palabuhanratu
Get PDFSmall and slender boats are usually installed with outrigger as additional construction to enhance its stabilities. The same practices are found in Palabuhanratu fishing port. The massive use of outrigger in most fishing ports, including Palabuhanratu, have led to berthing problems due to limited area of the port basin, hence boat or outrigger modification is required to overcome the problem. Adjusting the hull slenderness by defining the proper breadth and depth (B/D) ratio can be potential approach to eliminate the outrigger. Therefore, this research is designed to define ideal B/D ratio for boat without outrigger based on its stability, resistance and seakeeping in accordance with operational purpose. The study was conducted by simulating three different B values with constant D, each of which experiencing two different operational conditions, half and full loads. The quality of boat stability was evaluated in five parameters defined by IMO, whilst the resistance performance was evaluated using comparison analysis, and the seakeeping performance was evaluated using wave height and wave arrival angle. The result showed that according to its operational purposes, the boat with B/D ratio of 1,71 has the best performance to be operated without outrigge
Analisis Kestabilan dan Kontrol Optimal pada Model Matematika Penyebaran Penyakit Mumps
Get PDFMumps is an acute disease in children and adults, caused by paramyxovirus. In this thesis, a mathematical model analysis of the spread of mumps disease was carried out and the application of optimal control, namely prevention by giving vaccinations and treatment. Based on the analysis of the model without control obtained a non-endemic equilibrium point and an endemic equilibrium point. The non-endemic equilibrium point is local asymptotic stable if the basic reproduction number is less than one while the endemic equilibrium point tends to be local asymptotic stable if the basic reproduction number is more than one . Optimal control on the mathematical model of the spread of mumps disease was carried out using the Pontryagin’s Maximum Principle. The results of numerical simulations show that the provision of control, namely prevention and treatment, is simultaneously considered the most effective and efficient to minimize the number of individual populations infected with mumps disease with minimum cost
Penerapan Metode Hybrid Dekomposisi-Arima dalam Peramalan Jumlah Wisatawan Mancanegara
Get PDFThe Decomposition-ARIMA hybrid method is a combination of two methods used to predict future events in time series data. This method separates the data into three components: the seasonal component, the trend component, and the random component. The decomposition method is employed to forecast the seasonal and the trend components in a data series, while the ARIMA method is utilized to predict the random component within the data series. A tourist is an individual who visits an area for a specific period, making use of its facilities and infrastructure. In order to ascertain the growth of the number of foreign tourists, this study employs the decomposition-ARIMA hybrid method. The aim is to derive forecasting results from the data on the count of foreign tourists from January 2022 to December 2022. The research finding indicates that the best ARIMA model is ARIMA (0, 1, 1) with a Mean Absolute Percentage Error (MAPE) of 8.5% signifying a very high forecast accuracy
Reviewer
Get PDFPapers on JIFAM - The Journal of Infrastructure & Facility Asset Management Journal is regulated by general stipulation as follows.- Papers must be a real work of the author.- Papers has never been published in other media.- Papers must contain discussion about Infrastructure & Facility Asset Management.- Papers must contains a new discussion, judging based on the discussion that has been published in previous JIFAM.- The paper has to take references from Scientific Journal with minimum of 5 papers.- Paper lengths are limited in 8-16 pages.- Paper Template can be downloaded on the website http://https://iptek.its.ac.id/index.php/jifamScope of TopicJIFAM accepts papers on Infrastructure & Facility Asset Management. The scope of the topic includes, but not limited to,- I & F Function- I & F Demand - Supply- I & F User Behavior- I & F Policy- I & F Planning- I & F Administration Aspects- I & F Operation System- I & F Maintenance System- I & F Evaluation Technique- I & F Disposal- I & F Economical Aspect- I & F Financial Aspect- I & F Management Organization- I & F Spatial Aspects and Environmental AspectsReviewerDr. Ir. Alex Abdi Chalix MM., MT., Kementerian Pekerjaan Umum dan Perumahan Rakyat (PUPR), JakartaProf. Dr.Tech.Ir. Danang Parikesit MSc., University Network For Indonesia Infrastructure Development, Indonesia.Prof.madya Dr. Maimunah Bt Sapri., Real Estate Department, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.Wahyu Caesarendra, ST., M. Eng., Ph.D., Departement Integrated Technology, University Brunei Darussalam, Brunei Darussalam.Trihanyndio R. S. ST., MT., Ph.D, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, IndonesiaProf. Dr. Ir. Ria Asih A. S. M.Eng, Institut Teknologi Sepuluh Nopember (ITS), SurabayaIr. Achmad Wicaksono M.Eng., Ph.D, Universitas Brawijaya (UB), MalangMahendra A. M. ST., MT., Ph.D, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, IndonesiaDr. Dwa Desa Warnana S.Si., MSi, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, IndonesiaDr. Eng Januarti Jaya Eka P. ST., MT, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesi
Analysis Of Behavior And Chemical Stabilization Of Highly Plastic Local Excavated Soil for Embankments In The IKN Highway Project Segment 3A From Karangjoang To KKT Kariangau
Get PDFThe development of IKN Nusantara (Indonesia's New Capital City) in phase I, 2022-2024, focuses on basic infrastructure development, one of which is the IKN Toll Road Segment 3A Karangjoang - KKT Kariangau (STA 14+000 - STA 25+909) in Balikpapan. This development will add back to Indonesia's infrastructure assets, especially the Ministry of Public Works and Public Housing. One of the main works in the construction of this toll road is excavation and embankment work, the need for a lot of embankment material is a problem in itself so that the excavated soil as much as possible is sought to be used as embankment soil by mixing the excavated soil with fly ash and bottom ash from Balikpapan Steam Power Plant, this is one form of soil stabilization experiment. The mixture testing was carried out by making 3 types of mixture variations namely soil + fly ash, soil + bottom ash, and soil + fly ash & bottom ash, the 3 types of mixtures were tested by standard proctor test and then continued with soaked CBR testing with 0, 7 and 14 days of curing. From these mixes, the highest soaked CBR test result value was 6.013% from the soil + BA 15% mix with 0 days of curing and the lowest value was 0.709% from the soil + FABA 10% mix with 14 days of curing. Due to the negative trend of the soaked CBR test results where the average value is below 6%, the mixed material is not recommended for use
Editorial
Get PDFThis JIFAM 6 (Special Issue 1) January 2024 publishes 5 papers related to slope stability and soil improvement methods to develop the sustainable asset management for national road infrastructures.As regulated in Indonesian Scientific Journal Accreditation, a Scientific Journal can publish the Supplement and Special Edition.The JIFAM Editorial Team express their gratitude to the authors who already submitted their papers for the sixth volume (Special Issue 1)
Correlation of Initial Soil Density and Maximum Soil Density Under Drying-Wetting Cycles and Their Soil Erodibility
Get PDFThe Serang - Panimbang Toll Road plan area of Banten province in regional stratigraphy from the starting station to the end consists of sedimentary rock sediments of the Bojongmanik Formation in the form of sandstone intersections with clayey limestone inserts that have been precipitated by the products of Karang volcano consisting of breccia and lava. This volcanic material exhibits a coarse soil texture, high water absorption capacity, and susceptibility to erosion. Soil erosion levels can be determined by measuring soil erodibility. Erosion often occurs in Indonesia because Indonesia has a tropical climate which has two seasons, the rainy and dry seasons. This climatic pattern contributes to the soil vulnerability to erosion, impacting its density. Therefore, it is important to know the effect of drying-wetting cycle on erodibility along the slope of Serang-Panimbang Toll Road. Soil samples will be modeled under two density variations: initial density and maximum density. Drying-wetting tests will determine the physical, mechanical, suction, and erodibility properties of soil. The results showed that there was an increase in the degree of saturation of 8.31% for the initial density soil and 17.12% for the maximum density soil. Unconfined compressive strength of the soil with initial density and maximum density also decreased in consistency which decreased from very stiff and stiff to very soft. However, erodibility values for both density conditions remained constant at 0.19 despite the drying-wetting cycles and is classified as low
Effect of Embankment Construction Pace on Slope Stability Wih Varied Heights on Organic Soft Soil in the Sicincin-Padang Toll Road Sta 10+250-10+400
Get PDFOn the Sicincin-Padang toll road section there are several geotechnical problems, one of which is that at the Sta 10+250-10+400 is dominated by an organic soil. In the implementation of a 4.0 meter high embankment there are cracks appeared on the left side of embankment toe. Based on the evaluation results of monitoring geotechnical instruments in the field, the cracks that occur can be caused by the bearing capacity failure or due to the implementation stages of embankment construction is too fast. The method used in this research is to use finite element method by numerical simulation using Plaxis 2D program to determine the stability of embankment slope stability acording to the stages of implementation in the field and by modeling a staged construction, where the speed of embankment construction depends on the thickness of the embankment layer used, which is 15 cm to 25 cm until the design height is reached and the consolidation time is 1 day to 14 days for each additional 1 meter of embankment height. The porpose of this study is to determine the stages of implementation that are safe and compliant with the design criteria requrements.From the modeling results the existing embankment construction in the field has a safety factor value of SF=1.156. In this research, variations in the construction stages that have been modeled were obtained that are safe and meet the design criteria at the location under review are; at Sta 10+250 with using 25 cm thickness fill layer and 14 days consolidation time, Sta 10+350 with a 15 cm thickness fill layer and 7 days consolidation time, Sta 10+400 with a 25 cm thickness fill layer and 5 days consolidation time. There are differences in the effective time at each of the locations reviewed, this is due to differences in geometric embankment conditions at each location. From the results of modeling analysis, it also found that by reducing the thickness of the embankment fill layer and increasing the consolidation time, the value of the safety number will increase, the amount of settlement will increase, the amount of lateral movement will decrease and the excess pore water pressure will decrease
Rice Identification Using Convolutional Neural Network with YOLOv7 algorithm and VGG16
Get PDFRice is the most widely consumed food worldwide. The many types of rice cause various difficulties in the process of classifying rice varieties. The process of manually classifying rice varieties that rely on human power has drawbacks including the subjectivity of assessment between observers, limited physical capabilities, and longer observation times. In this research a rice variety classification system has been developed using the Convolutional Neural Network with the YOLOv7 and VGG16 algorithms. The rice varieties classified are basmati, IR64, and rojolele varieties. The model with the YOLOv7 algorithm is trained for object segmentation of rice grains and is used to create rice grain image datasets. The model with the VGG16 algorithm was trained by transfer learning and used for classifying rice grain varieties. The model with a learning rate hyperparameter of 0,000061, the ReLU activation function, the number of neurons 256 in the second classification layer, with the fine-tuning training method, has the best performance with an accuracy value of 100%. The best VGG16 model weight is used in application implementation. Identification of the type of rice with the application can be done on the image of a batch of homogeneous and heterogeneous rice grains with various arrangements
SMART CITIES FOR ALL: LEVERAGING TECHNOLOGY TO REDUCE URBAN INEQUALITY
Get PDFThis research paper delves into the transformative potential of technology to address urban inequality, a persistent challenge faced by urban centers marked by income disparity, limited access to essential services, and spatial segregation. Employing a multi-disciplinary approach, the study integrates insights from urban planning, social sciences, and technology innovation. Beginning with an extensive literature review, the research identifies key manifestations of inequality in cities and explores the ways technology has been harnessed to mitigate disparities in education, healthcare, transportation, housing, and public services, drawing from successful case studies and underlying principles that facilitated their success. The study also addresses the challenges and limitations associated with technology driven solutions, including ethical considerations, digital divides, and potential unintended consequences, while investigating the role of public-private partnerships and policy frameworks in supporting technology-driven initiatives to reduce urban inequality. Presenting a comprehensive framework, the paper outlines various technological interventions and innovative strategies, ranging from smart city infrastructure and data-driven decision-making to inclusive digital platforms and community-driven solutions, all adaptable to specific urban contexts. In conclusion, the research offers actionable recommendations for policymakers, city planners, and technology developers to effectively utilize technology in reducing urban inequality, emphasizing collaborative efforts, participatory design, and continuous evaluation to ensure equitable distribution of benefits from technology-enabled urban development. By analyzing successful case studies and addressing potential challenges, this study provides valuable insights to create more inclusive cities through the judicious application of technology, fostering a broader dialogue among stakeholders and encouraging the adoption of innovative and ethical practices to establish sustainable, just, and equal urban spaces