IPTEK Journal of Proceedings Series
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Oil Prices Sensitivity to The Power Supply Procurement Project at PT PEP Sukowati
Get PDFThis study intends to determine the sensitivity of changes in oil prices to investment in power supply projects from the financial aspect. The investment analysis conducted is an evaluation of Net Present Value (NPV) using the production sharing contract (PSC) model with a profit sharing system. Based on the analysis conducted, the sensitivity of changes in oil prices has a very significant effect on the project NPV. Changes in oil prices by 60% from the base case to US 20 or -60% from the base case, it will make the NPV negative, so the project is not economical to proceed. In addition, it know that the acceptance limit of investment in power supply projects is at oil prices greater than US $ 34 per barrel. This significant change in both the decline and increase in oil prices to the NPV is very logical because oil prices determine the amount of revenue earned from this project
Green Information Technology in Indonesia– A Systematic Literature Review
Get PDFIn Indonesia, information and communication technology (ICT) is one of the most crucial economy accelerators, for every 10% increase in the ICT investment, the nation’s GDP grows as much as 1.87%. However, the use of ICT leaves adverse impacts on the environment, particularly carbon emission and toxic waste. This phenomenon has led to the proliferation of the topic of environmental sustainability, one of which is green information technology (GIT). GIT is defined as the utilization of ICT that can directly or indirectly reduce the adverse impact of business processes on the environment. This paper aims to evaluate GIT research to attain a better understanding of the field of GIT in Indonesia through a literature review. Published papers are categorized and a gap analysis is presented to reveal areas that need to be explored more. The results of this study potentially serve as a guide for future studies in GIT, particularly in Indonesia. This research finds that the topic has gained popularity in recent years. There are various research themes under the topic of GIT in Indonesia, with the most explored one being the design and implementation of GIT. The majority of the studies are case-based, limiting the research scope to one particular organization. This leaves broader research objects open to be explored more
Modelling Adoption of Innovation at a State Owned Company
Get PDFThis study aims To measure the level of technology readiness level (TRL) and to assess user acceptance to use the transportation management system software utilizing technology acceptance model (TAM) approach. Technology acceptance model (TAM) is used to describe the three components, i.e., perceived usefulness, perceived ease of use, and behavioral intention to use . To ensure that these 3 components are important factors of TAM, authors utilized factor analysis method, whereas t-test calculations were carried out to find out the relationships between components. The results show that the TRL of transportation management system software readiness is 9 which means that it is ready to be used widely in the company. The factor analysis shows that TAM is influenced by the three components, which is able to explain about 66.8% of variations. In the meantime the t test shows that all hypotheses are accepted, so there are significant relationships between components analyzed. To summarize, the authors conclude that the company can benefit the usefulness and ease of use of the transportation management system software developed, so that the behavioral intention to use and the utilization of this technological innovation can be optimized
Acetylation of γ-mangostin Isolated from the Mangosteen Pericarp (Garcinia mangostana Linn.) and Their Antidiabetic Activity
Get PDFMangosteen (Garcinia mangostana Linn) is one of the most well-known plants in Indonesia. Mangosteen contains many derivatives of oxygenated and prenylated xanthones from phenolics which exhibit diverse biological activities such as antioxidants, antimalarials, anti-allergies, anti-tumors, antiviral, antibacterial, anti-inflammatory, anti-fungal, anticancer, and antidiabetic. Modification of xanthone compounds is known to increase antidiabetic activity and it is known that α- and β-mangostin acetylated can be produced from the modification of α- and β-mangostin using acetic anhydride. In this study, as many as 1.43 grams (1.59%) of the γ-mangostin compound were successfully isolated from the ethyl acetate extract of mangosteen pericarp. Modification of γ-mangostin through the acetylation reaction produces acetylated γ-mangostin in the form of 3,6,7-tri-methylester-γ-mangostin as much as 32.9 mg (63%). Antidiabetic test results showed γ-mangostin had an IC50 value of 8.55 μM, while the IC50 value of 3.6.7-tri-methylester-γ-mangostin was 1.82 μM. Acarbose as a positive control has an IC50 value of 4.48 μM. This shows that modification can increase antidiabetic activity
Integrating Business Process Improvement and Information Systems to Improve Service Quality: A Conceptual Model
Get PDFPT. X is a company that is engaged in testing telecommunications equipment. In its business activities there are some special problems in the current business processes and information systems that are not optimal. This research was conducted to examine the quality of services produced by business processes and information systems used today. The method used is to integrate Business Process Improvement with information systems to improve service quality. The results obtained from this study consist of a conceptual model for getting business processes and designing information systems that have accommodated business process and service improvements
Maintenance Heavy Equipment Management Through Contract Models or Company it Self
Get PDFOne important activity and cause high costs in the company is maintenance and in mining one of critical maintenance is heavy equipment. Issue of manpower, skill, expert and equipment population made company can’t handle the maintenance it self. Agreement to the contractor made with several contract models. This maintenance management either by company it self or by different contract models have their strong and weakness point. This research will analyze which maintenance management is better using Fuzzy AHP as a multicriteria decision making tool. Responden will selected to define the criteria and sub-criteria. The result of this research are to select maintenance management that will use as standard in the company
Media Sentiment Analysis of East Java Province: Lexicon-Based vs Machine Learning
Get PDFIndonesian Ministry of Communication and Informatics reported internet users in Indonesia reached 150 million with a penetration of 56% in January 2019. This indicates the era of information disclosure; therefore, information on government performance is more easily obtained by all levels of society. Society is becoming more sensitive to government performance, and more feedback is being given to the government. This large amount of feedback has stimulated research on public sentiment analysis. This study compares the public sentiment analysis by two different approaches to the government performance of East Java Province. The study was comparing the lexicon-based method approach and the Support Vector Machine (SVM) from the machine learning approach. This study uses Twitter and Instagram datasets, and also the online news media web that reports on East Java. This study found that by using a combined data source of social media and online media, the lexicon-based approach produced an accuracy value of 57.7%; while the SVM machine learning method approach produces an accuracy of 44.7%
Reliability Analysis and Economic Life Calculation for Asset Management Optimization (Case Study in Steam Power Generation Unit at XYZCompany)
Get PDFIn a competitive market driven industry at a power generation business, requires The electricity producers to provide electricity with a low cost of supply. On the other hand, the large number of equipment assets managed by the power plant companies requires an appropriate asset management process, in order to reduce the increased maintenance and investment costs of equipment which which can cause an increase in the cost of supply. XYZ Company as a company that manages assets of more than Rp 174 trillion has challenges in the process of optimizing its company's asset management. The decreasing amount of maintenance and investment budget in the company each year and the equipment conditions that have been operated for more than 20 years, requires an asset management method that can provide a comprehensive understanding of the technical and economic conditions of each equipment, so it can be provide appropriate information to support the decision making process that is expected to reduce cost of supply.In this study, the authors conducted an analysis of asset conditions at XYZ Company by combining the method of reliability analysis and calculation of the economic life of the equipment. Case study was conducted at one of the units at XYZ Company precisely in Steam Turbine Unit 2.0. The purpose of this study is to obtain comprehensive information including the value of reliability and economic life of each equipment in the unit to facilitate management in the decision making process for the selection of maintenance strategies and asset replacement.Reliability analyzes were performed using RBD, RGA, and Weibull software. Reliability calculation will be done by looking at the amount and time between damages. Economic life calculation is done by calculating the annual equivalent cost. The analysis was performed on each equipment in the Steam Turbine Unit 2.0. From this analysis, it’s resulted the procedure for the classification of power plant equipment for the replacement process in accordance with the limits of the parameters of the reliability index and economic lifereliability and economic life conditon. Moreover, It’s resulted the mapping of Steam Turbine critical quipment. This mapping illustrates the amount of equipment that must be replaced immediately, still maintained, and the maintenance strategy needs to be evaluated immediately. This information is used by management in deciding the evaluation of equipment maintenance strategies and replacement strategies to reduce the power plant cost of supply
Analysis of the Factors Affecting Delay in Housing Projects in XYZ Group)
Get PDFSuccess in completing projects on time is one of the essential goals, both for the owner and the contractor. XYZ Group, a holding of several companies in the real estate, has delayed more than 53% of housing projects. The impact of delays is time overrun, cost overrun, deviations in the quality, disputes, negative social consequences, arbitration, and idling resources. This paper studied a list of construction delay causes gathered from the literature. It starts by exploring factors causing project delays from the research and finding 48 causative factors, followed by distributing preliminary questionnaires to expert respondents to obtain 23 causes for housing project delays. The primary survey held on 55 respondents consisting of technical directors, project managers, project engineers, quality control, logistics, and project planners. Relative Importance Index (RII) calculated, and according to the highest values, the top five delay causes of housing projects are determined. Objectives of project delays from the owner and contractor are "Late issuing of approval of design documents by the owner," and "Changing government political/economic situation or policy." The cause of project delays from the owner is "Shortage of labour from the contractor," "Changes to work completed by the owner," and "Failure of the contractor to complete the work." Meanwhile, "Slow delivery of resources required by the contractor," "Changes in details by the owner," "Rework due to quality and final results by the contractor," is the cause of project delays from the contractor
Formation of New Territories in Residents’ House in Tourism Kampung
Get PDFChanging an ordinary kampung into a tourist kampung will provide changes in every aspect of the kampung. These changes are among the changes in terms of social, economic, cultural, environmental, and activities in the tourist kampung. Through the change of activities automatically forms a new regulatory system in its spatial and function. then comes the urge of citizens to maintain and form a private territory to other activities (tourist activities). so it needs to know how the villagers form their new territory in the outer space of their dwelling to get the comfort and privacy that suits their needs. The method used to determine the formation of new territories carried out by citizens using studies from research that raised similar phenomena that have occurred. After that, a comparison is made with field data or the current conditions of the current tourist kampung. The results obtained will find the form of citizens' efforts to form new territories with their boundaries. The boundaries are adjusted to the factors that shape it such as space requirements, spatial functions, activities, and the perpetrators of these activities. Then it can be used to indicate other changes that occur in the tourist kampung