Universitas Proklamasi 45 Online Journals
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Pyrolysis Process of Organic Waste into Bio-Oil as an Alternative Fuel
Get PDFOne of the abundant potential energy sources in Indonesia is organic waste in the form of biomass waste, which amounts to 60% of the total waste in Indonesia. Organic waste from various parts of plants can be converted into fuel in the form of bio-oil through a fast pyrolysis process. The effectiveness of this process really depends on the temperature in the reactor and the type of material being processed. Therefore, the aim of this research is to study the effect of process temperature and type of raw material on yield and the quality of the bio-oil produced. The raw materials used are sawdust, rice husks, or mango plant leaves, which have been cut into pieces to a maximum size of 3 cm. Then the raw material is put into the pyrolysis reactor and heated to a temperature to be varied, namely 200°C, 300°C, 400°C, 500°C, and 600°C. This heating produce vapour, which is then condensed into liquid bio-oil, and be purified until it is equivalent to fuel oil, as well as non-condensable gas, which can also be used as an alternative fuel. The results of raw material analysis show that sawdust has lower water and ash content as well as a greater calorific value compared to rice husks and mango leaves. Meanwhile, the experiments show that in the pyrolysis process, the higher of the temperature have increased the yield of bio-oil produced, up to a temperature of 500°C, where the yield have decreased at even higher temperatures. The highest yield was achieved in the pyrolysis of sawdust at a temperature of 500°C, namely 30%. Meanwhile, for the heating value, the higher of the temperature have increased the heating value of the bio-oil. The highest heating value was obtained in sawdust pyrolysis at a temperature of 500°C, namely 1,35 joules per gram
Pengaruh Risiko Kredit dan Risiko Operasional terhadap Profitabilitas pada Perusahaan Bank Tabungan Negara Periode 2016-2020
Get PDFThis study aims to determine the impact either at the same time or somewhat between credit risk (NPL) and operational hazard (BOPO) on profitability (ROA) in the State Savings Bank listed on the Indonesia Stock Exchange for the 2016-2020 period. The sample in this research is one banking company. The research method used is a saturated sampling technique. The logical strategy used is various direct relapse examinations using the SPSS program. The results of this study are that simultaneously credit risk (NPL) and operational risk (BOPO) have a large and significant result on productivity (ROA) at the State Savings Bank for the 2016-2020. Partially, the research results on the credit risk variable (NPL) do not have a critical impact and have a negative relationship to profitability (ROA) at the State Savings Bank for 2016-2020 period. Partially, the results of testing the operational risk variable (NPL) have no major impact and have a negative relationship to Profitability (ROA) at the State Savings Bank for the 2016-2020
Pengaruh Pengembangan Karir, Lingkungan Kerja, dan Motivasi terhadap Loyalitas Pegawai Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kota Yogyakarta
Get PDFThe first inspection revealed several significant problems related to working conditions, according to the Yogyakarta City Investment and One-Stop Integrated Services Service. Employee comfort and productivity are negatively affected by inadequate lighting and poor air circulation in the workplace. Apart from that, limited facilities such as limited workspaces are also an inhibiting factor in improving employee abilities and skills, as well as opportunities to achieve desired career goals. Another problem was employee loyalty which needed to be increased, which was reflected in employee absenteeism during working hours. This research involved 60 employees as a population with sampling using the census method. Career advancement opportunities, a pleasant work environment, and intrinsic motivation together have a good and substantial influence on employee loyalty, according to research using multiple linear regression. Career development, work environment, and motivation simultaneously have a positive effect on employee loyalty. Employees tend to be more loyal to the company as a whole if these areas are improved
Pengaruh Kepuasan Agen, Kualitas Layanan, dan Kualitas Produk terhadap Loyalitas Agen Penyalur Cat Mowilex di Wilayah Yogyakarta
Get PDFBusinesses with increasingly competitive competition require companies to understand the factors that influence agent loyalty. This research uses quantitative methods and random sampling to determine the sample. Respondents were selected from a list of Mowilex paint distribution agents in Yogyakarta, totaling 124 people with a sample of 95 respondents. The results of this research indicate that the independent variable accounts for 66.5% of the variation in the dependent variable. Meanwhile, agent satisfaction and product quality do not have a significant effect on agent loyalty. On the other hand, service quality has a considerable impact on agent loyalty. Overall, agent satisfaction, product quality, and service quality have a significant effect on agent loyalty simultaneously
Aplikasi Sensor Temperatur dan Inhibitor Sodium Lignosulfonate (SLS) sebagai Solusi Pencegahan serta Monitoring Silica Scaling pada Pipa Pembangkit Listrik Geotermal
Get PDFOne of the problems encountered in geothermal exploitation activities is Silica Scaling Rate (SSR). Addressing SSR remains a significant problem, especially during production in geothermal fields with high Silica Saturation Index (SSI). High SSI can lead to silica deposition in pipes. Silica deposition occurs due to temperature drops, pressure decreases, and pH increases. As the temperature drops, the SSR increases, disrupting the fluid flow process from the reservoir. To address this issue, a system was designed to monitor the pipe\u27s condition and trigger SLS injection if the temperature parameter value dropped. SLS functioned by binding silica particles in the fluid, preventing silica from adhering to the pipe walls. This process was carried out by adding SLS chemicals to the fluid flow through the pipes. SLS materials had the ability to bind silica and effectively prevent scale formation. Based on analysis and calculations, a temperature drop was directly proportional to an increase in SSI. A reference temperature of 95°C was used as an indicator for SLS injection because SSI > 1 at this temperature. A dose of 50 ppm SLS was shown to effectively reduce SSI up to 50%, preventing silica scaling in geothermal pipes. This study demonstrates the effectiveness of SLS as a mitigation strategy for silica scaling, offering a cost-efficient and less disruptive solution compared to conventional pipe cutting methods
Pengaruh Earnings Management terhadap Tax Avoidance Sebelum dan Selama Covid-19 pada Perusahaan Manufaktur di Indonesia
Get PDFThis study aims to examine the effect of earnings management and capital intensity on tax avoidance with sales growth as a moderating variable. This study uses a sample, namely manufacturing companies listed on the Indonesia Stock Exchange for the 2017-2019 period. The sampling technique used in this study, namely the purposive sampling method with the acquisition of a sampling of 119 samples. The data analysis technique used in this study uses panel data regression and the Chow test to explain the effect of earnings management on tax avoidance before and during Covid-19. This study suggests differences in tax avoidance and earnings management levels in the pandemic era compared to the pre-pandemic era. This study also concludes that earnings management is positively associated with tax avoidance during the pandemic
Analisis Penerapan TELOS Feasibility Study Sebagai Kriteria Penilaian Kelayakan Investasi pada UMKM: Studi Kasus Inkubator Bisnis di Lampung
Get PDFThis study aims to provide investment feasibility assessment criteria that can be used to assess MSMEs so they can help increase opportunities to obtain investment. There are no specific regulations regarding investment eligibility criteria for MSMEs in Indonesia, so it’s difficult for various parties to carry out investment activities. The approach is taken through the dimensions of Technical, Economic, Legal, Operational, and Schedule Feasibility Studies (TELOS FS) which are usually used to analyze the feasibility of investing in projects. The object of this research is a business incubator that provides funding for MSMEs. This research used interviews, observation, and document analysis for investee and business incubators. The research results show that using TELOS dimension can be fully utilized with several adjustments. Another result is that TELOS FS can be used for SMEs. For micro businesses technical and operational aspects can be fully assessed, but for using comprehensive aspect assistance/incubation is required to apply TELOS FS as an assessment aspect. This research helps investors to map aspects to assess the feasibility of investing in MSMEs. This research was conducted using qualitative methods for in-depth exploration, but further research using quantitative methods with a larger sampling number is expected to support this research
Analisis Proses Pengambilan Keputusan oleh Pemimpin dalam Menciptakan Komitmen Organisasi
Get PDFThe purpose of this research is to analyze the way leaders make decisions to implement an organization\u27s commitment. The research method used is a qualitative research method and a social construction phenomenology approach which interpretatively aims to determine the implementation of a leadership decision in an organization. The research location was at BPR Pusaka examining six informants consisting of employees and leaders. Data collection techniques were carried out using interviews, observation, and documentation at the research location. Data analysis uses triangulation of sources, techniques, and time. The results of this research found that in determining policies, the role of leaders is very necessary in designing structured Terms of Reference to achieve good results to achieve the goals of an organization. The application of fair and effective leadership and decision-making is very necessary so as not to give rise to a tendency to overthink or worry which can lead to poor communication
Pengaruh Perencanaan Anggaran dan Pengendalian Intern terhadap Akuntabilitas Keuangan dengan Realisasi Anggaran sebagai Variabel Pemediasi
Get PDFThe research aims to determine how budget planning and internal control influence budget realization at the UPT of the Central Java Provincial Health Service. To find out how budget planning, budget control, and realization influence regional financial accountability at the UPT of the Central Java Provincial Health Service. The population in this study was 300 UPT of Central Java Provincial Health Service employees. The sampling method uses purposive sampling, i.e. taking samples by determining the criteria first. These criteria are employees who are involved in budget planning and internal control/auditing and have become civil servants. Determining the sample size using the Slovin formula obtained 171 respondents. The data collection method uses a questionnaire. Data analysis uses linear regression analysis. Based on the research results, it can be concluded that budget planning and internal control influence the realization of the Central Java Provincial Health Service UPT budget. Budget planning, internal control, and budget realization influence the financial accountability of the UPT of Central Java Provincial Health Service. Budget realization mediates the influence between budget planning and internal control on the financial accountability of the UPT of Central Java Provincial Health Service
Pemodelan dan Prediksi Densitas Larutan Porang dan Xanthan Gum dengan Menggunakan Model-Model Machine Learning
Get PDFOne physical characteristic that is helpful in comprehending the physical and chemical characteristics of a solution is the density of the polymer solution. Its primary function is to ascertain the polymer\u27s concentration in solution. The density value can be used to estimate the polymer concentration in solution. The study of the flow and viscosity of polymer solutions also makes use of the interaction between the polymer and solvent. This study aims to establish a relationship between the density of porang and xanthan gum solutions and the percentage of porang, polymer content, and salinity. Machine learning models, like the Adaptive Neuro Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN), are used for modeling. The creation of these machine learning models used 471 digitized data of density curves of porang solution, xanthan gum solution, and porang-xanthan gum mixture solution. The training, validation, and testing processes of the ANN and ANFIS models provided average correlation coefficients of 0.99955 and 0.99999, respectively. Comparison between the estimates of the ANN and ANFIS models and the measurement results of 27 porang and xanthan gum solutions provided accurate results with correlation coefficients of 0.99893 and 0.99996, respectively.