Study of biomass energy sources in Depok city as support the energy needs in small industriesMartana, Budhi; Fahrudin, Fahrudin; Purba, Riki Hendra; Hamzah, Muhammad Fakhri; Wijaya, Muhammad Rasyiid
doi: 10.1088/1755-1315/1454/1/012016pmid: N/A
Energy demand increases with the increase in human population and economic development. Energy has a very important role in supporting household activities, offices, business units and industries. Biomass waste such as sawmill waste, leaf waste, corn cobs and other biomass waste can be utilized as a renewable energy source in the form of biopellets as the solution of energy problems. This study aims to utilize the potential of biomass waste in Depok City to be used as raw material for making biopelets. The research method used is descriptive research, which aims to describe and illustrate the way to utilize biomass waste as a renewable energy source. The expected results of this research activity will provide benefits for local governments and universities in producing renewable energy that can support energy needs for small businesses and households.
Mapping the efficiency of Surabaya’s creative industries with data envelopment analysis –a push towards a circular economySaraswati, Rahaju; Kusumowidagdo, Astrid; Susilowati, ; Sukirmiyadi, ; Karaman, Novel; Ali, Munawar; Zafriana, Lusi; Teowarang, Janet
doi: 10.1088/1755-1315/1454/1/012069pmid: N/A
The movement towards a circular economy and resource efficiency is very important both from a production, consumption, economic and environmental perspective, and provides the basis for a sustainable and competitive economy. The creative industry has great potential to increase the growth, prosperity and competitiveness of a country. The creative industry in Indonesia has made a significant contribution to national economic growth, including the growth of the circular economy. The Indonesian government has deter-mined 17 sub-sectors of the creative industry as development priorities, namely digital applications and games, architecture, interior design, visual communication design, product design, fashion, animated films and videos, photography, crafts, culinary, music, publishing, advertising, art performance, fine arts, and television and radio. In 2022, Surabaya’s creative economy will be among the largest in East Java, and the main subsectors will be culinary, music and performing arts. Despite its significant contribution, there are many problems faced by Surabaya’s creative industry, such as inefficient use of re-sources, lack of access to financing, lack of management capabilities in product development and human capital development. This article maps and measures efficiency in Surabaya creative industry subsector to identify factors that influence efficiency performance in the Surabaya creative industry subsector so that improvements can be made. The analysis methodology used is Data Envelopment Analysis (DEA). To visualize the results of efficiency measurements, a Business Intelligence dashboard was developed. The main objectives of this research are measuring efficiency and mapping the Surabaya creative industry subsector, make improvements to resource factors and pro-duction output factors and to make a more optimal allocation of production resources. The results of measuring efficiency using the DEA method with the CRS model, it is known that out of 100 DMUs, 17 DMUs are inefficient, and 83 DMUs are efficient. Based on Slack Based efficiency (SBM Efficiency) calculations, 62 DMUs are efficient, of the 100 DMUs surveyed, 57 DMUs have strong efficiency, 26 DMUs have weak efficiency (efficient but still have slack), and 17 DMUs are inefficient. The main causes of inefficiency in the Surabaya creative industry sub-sector are cost, management and human capital factors or the problem of resource use inefficiency.
Production of bioethanol from coconut water through fermentation processSari, Ni Ketut; Prabawa, Mohammad Kimpria; Alviola, Syaroh Ryadhani; Ernawati, Dira; Sari, Komang Nickita; Anityasari, Maria
doi: 10.1088/1755-1315/1454/1/012007pmid: N/A
The substantial and increasing coconut production in Indonesia results in a corresponding rise in coconut water production. To address this surplus, coconut water can be utilized to produce bioethanol through fermentation. Bioethanol is ethanol derived from plant materials rich in carbohydrates, cellulose, or glucose. This study explores the production of bioethanol from coconut water using Alcotec 48 Turbo Yeast. The ethanol content is analyzed using an alcohol refractometer, followed by distillation to enhance ethanol concentration. The initial glucose content of coconut water post-hydrolysis is 14% (v/v). Optimal conditions for fermentation were found with 14 g/L of Alcotec 48 Turbo Yeast over a period of 6 days, yielding a bioethanol content of 37% (v/v). After distillation under the same conditions, the bioethanol content increased to 53% (v/v). Using Response Surface Methodology (RSM) in Minitab 17, further optimization revealed that fermenting with 6 g/L of Alcotec 48 Turbo Yeast for 2 days resulted in a bioethanol content of 19.7829%. Subsequent distillation at 14 g/L of yeast over 9 days maintained the bioethanol content at 53.764%. This research demonstrates the potential of utilizing coconut water for bioethanol production, highlighting effective fermentation and distillation strategies to enhance ethanol yield.
Application of critical path method (CPM) in arsinum drinking water plant construction projectAhsan, Agung Firdausi; Suswanto, Budyi; Wahyuningtias, Novi
doi: 10.1088/1755-1315/1454/1/012020pmid: N/A
Project activity can be defined as a temporary activity that lasts for a limited period, with the allocation of certain resources and is intended to carry out tasks whose targets have been clearly outlined. One of the differences between project activities and operational activities is that in project activities there are various activities that require various disciplines, in addition to the intensity of activities in varying cycle periods. For this reason, it is necessary to prepare a schedule of activities in the project so that the project can be completed within the specified time limit. The project is certainly expected to be completed according to the agreed plan, it would be better to finish before the planned time. In this study using the Critical Parth Method (CPM). The object of research is the construction project of the Arsinum Drinking Water Factory in Sumenep. This study aims to determine the effective scheduling is done by using the CPM method. According to the research results, the project can be completed within 20 days to 15 weeks.
Analysis of inventory control of label sticker raw materials using the continuous review (q) and periodic review (p) methodsErnawati, Dira; Sari, Ni Ketut; Winursito, Yekti Condro; Hidayatulloh, Moch. Annas; Maulana, Alfian Rizky
doi: 10.1088/1755-1315/1454/1/012051pmid: N/A
X is a manufacturing company that produces label stickers. For this production, they require key raw materials, one of which is a 22.5cm Raflacoat type substrate. Currently, the company X has difficulty in controlling the inventory of this type of substrate as its demand often fluctuates. This often results in stock shortages (stock outs) which cause many customers to cancel orders due to insufficient inventory. This study aims to control the inventory of Raflacoat 22.5 cm substrate in order to minimize the occurrence of shortages and excess stock and reduce the total cost of inventory at company X. The methods used are Continuous Review (Q) Lost Sales and Periodic Review (P) Lost Sales. The calculation results show that the minimum total inventory cost with the Continuous Review (Q) Lost Sales method is Rp2,160,302,178, while the company method is Rp2,396,962,073. Thus, the cost savings achieved are Rp236,659,895 or 9.87%. After forecasting the needs in the period March 2023 to February 2025, the total need is estimated to reach 2304 rolls. Based on the inventory control of Raflacoat 22.5 cm substrate raw materials, the optimal number of orders is 193 rolls per order with a total inventory cost of Rp2,739,423,128.
Tensile strength and fracture surface analysis of polyvinyl alcohol biocomposite filled sengon wood sawdustAsrofi, Mochamad; Pramesti, Zafirah Nur Rahmah; Hermawan, Yuni; Sakura, Rahma Rei; Rosyadi, Ahmad Adib; Pradiza, Revvan Rifada; Setyawan, Haris; Sujito, ; Rushdan, Ahmad Ilyas; Rizal, Muhammad Asyraf Muhammad; Alahmadi, Mohammed
doi: 10.1088/1755-1315/1454/1/012013pmid: N/A
Sengon wood sawdust (SWS) is a natural filler that has the potential as a new reinforcement in biocomposite. In this study, an experiment was conducted to mix a PVA solution with various concentrations of SWS fibers at concentrations of 0%, 5%, 10%, 15%, 20% and 1% glycerol. The observations included tensile strength, elongation, and fracture morphology by scanning electron microscopy (SEM). The highest tensile strength was 3.65 MPa for 10% biocomposite variation. This is supported by SEM image which show a compact structure. This phenomenon also indicates good SWS dispersion without the formation of agglomerations.
Study on service level at Ahmad Yani Port TernateHakim, Raudha; Saleh, Nur Rifqah M
doi: 10.1088/1755-1315/1454/1/012052pmid: N/A
Ahmad Yani Port Ternate plays an important role in sea transportation traffic and the mobility of passengers, goods, and services to and from Ternate City. Considering the current condition of Ahmad Yani Port, which still has shortcomings in the suboptimal service level of its infrastructure, the objective of this research is to determine the service level of the port and to assess the service level of the infrastructure facilities at Ahmad Yani Port Ternate. Data collection was conducted through the distribution of questionnaires to port service users. The number of respondents totaled 200, consisting of 100 passengers of the KM. Sinabung and 100 passengers of the KM. Labobar. The analysis method used was the Customer Satisfaction Index. The analysis of 20 service indicators/attributes showed that the services provided by the management of Ahmad Yani Port Ternate had an average satisfaction index value of 60.5%, which falls into the “quite satisfied” criteria. The availability of information on onward transportation, location, direction signs for onward transportation, types of transportation, health facilities, the number of toilets, special facilities for disabled passengers, and special rooms for breastfeeding mothers was rated as “not satisfied” and are a top priority for improvement and enhancement by the port management.
Prototype for monitoring soil moisture and temperature of mustard plants in the sari jaya farmers group merauke districtNugraha, Syaiful; Yusuf, Mani; Istanto, Teddy; Nggego, Dedy A; Rachmat,
doi: 10.1088/1755-1315/1454/1/012006pmid: N/A
Mustard plants are a type of leafy vegetable known for several varieties, with the most common being green mustard. Therefore, the role of farmers in cultivating green mustard is crucial in various aspects, from land preparation to harvest. The Sari Jaya Farmers Group in Merauke specifically has practices in their cultivation process, such as monitoring the environment of mustard greens. One of the main challenges faced by the Sari Jaya farmers is maintaining optimal soil conditions and temperature for mustard greens’ growth. If the soil environment becomes too moist, the stems of the mustard greens will quickly rot, and non-ideal temperatures, such as excessively hot conditions, can lead to imperfect growth, affecting both the quality and quantity of the harvest. This research involves developing a microcontroller-based monitoring system prototype. The study aims to develop an experimental model in the form of a microcontroller-based system prototype for monitoring soil moisture and air temperature in the mustard greens’ environment. By modeling a control device connected to an Arduino microcontroller platform, data will be sent in real-time via Short Message Service (SMS) notifications and messages to users. The research results show that the developed prototype can monitor soil moisture and temperature with adequate accuracy. This provides information about the soil and temperature conditions for mustard greens, helping farmers make informed decisions regarding irrigation and crop care. This prototype is expected to become a model agricultural system that enhances agricultural efficiency and productivity by optimizing the growth environment conditions for plants.
Inter-Island Commuter Travel Mode Chain Model in the Islands RegionWahyuni, Sri; Gaus, Abdul; Hakim, Raudha
doi: 10.1088/1755-1315/1454/1/012047pmid: N/A
Village growth and coastal development on islands are challenging phenomena in urban development that put pressure on transportation planning and provision. For waterfront cities the impacts are often amplified by exponential growth and limited availability of public transportation infrastructure. Therefore, the growth of waterfront cities is closely related to private vehicle ownership and public transportation availability, so it is important to study the commuter travel mode chain on the islands. This study involved 100 ASN respondents who often travel between islands using various types of transportation modes. The parameters of this study are the types of modes used in traveling from home to the office with variable travel time and travel costs associated with distance travelled. The best commuter travel mode chain is private motorcycle - speedboat - bentor, producing a model with a determination of 0.8602. The speedboat mode is the most used mode when traveling between islands compared to the ferry. While the bentor mode is the more popular mode on the port to office route because this mode has low travel costs but more flexible departure times, short travel times but still comfortable and safe.