Muhammadiyah University of Surakarta
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Analisis Tekno Ekonomi Sistem Fotovoltaik Pada Gedung Edutorium KH. Ahmad Dahlan Universitas Muhammadiyah Surakarta Menggunakan System Advisor Model (SAM)
Full text linkThe increasing demand for electrical energy requires alternative energy sources that are environmentally friendly and sustainable. One promising solution is the Photovoltaic (PV) Solar Power Plant (PLTS), which converts solar radiation into electrical energy directly. This study aims to analyze the technical and economic feasibility of implementing a photovoltaic system on the roof of the Edutorium KH. Ahmad Dahlan Building at Universitas Muhammadiyah Surakarta using the System Advisor Model (SAM) software. The research methodology includes solar radiation data collection, PV system design, performance simulation using SAM, and economic analysis through parameters such as Life Cycle Cost (LCC), Cost of Energy (COE), Net Present Value (NPV), Internal Rate of Return (IRR), and Discounted Payback Period (DPP). The simulation results indicate that the PV system with 1,032 monocrystalline modules rated at 480 Wp, 17 inverters, and 306 VRLA AGM batteries produces an annual energy output of 605,004 kWh with a performance ratio of 0.76. The total estimated investment cost is Rp 12,066,200,000, with a Cost of Energy of Rp 1,232/kWh. The economic analysis shows a positive NPV, an IRR higher than the discount rate, and a DPP shorter than the 20-year project lifetime, confirming that the PV system implementation at the Edutorium KH. Ahmad Dahlan UMS is technically and economically feasible
Evaluasi Sistem Drainase Pada Desa Gentan Di Kecamatan Baki Kabupaten Sukoharjo
Full text linkPermasalahan banjir yang terjadi di Desa Gentan, Kecamatan Baki, Kabupaten Sukoharjo disebabkan oleh sistem drainase yang tidak mampu menampung limpasan air hujan yang terjadi saat intensitas hujan tinggi. Akibatnya, saluran drainase secara bertahap mengalami penurunan kemampuan alir sehingga tidak berfungsi secara optimal dan menyebabkan berkurangnya kapasitas pengaliaran. Penelitian ini bertujuan untuk mengevaluasi kinerja sistem drainase eksisting serta menentukan kebutuhan desain ulangberdasarkan analisis hidrologi dan hidrolika. Data yang digunakan meliputi data primer berupa kondisi fisik saluran dan data sekunder berupa curah hujan Pos Pabelan, Peta Topologi, serta peta tata guna lahan. Analisis hidrologi dilakukan melalui uji konsistensi data hujan (RAPS), analisis frekuensi menggunakan Distribusi Log Pearson Type III, perhitungan hujan efektif, dan penentuan debit banjir rencana menggunakan Metode Rasional. Simulasi hidrologi juga dilakukan menggunakan software HEC-HMS. Hasil analisis menunjukkan bahwa debit maksimum banjir rencana mencapai 6,852 m³/detik, sedangkan beberapa saluran eksisting memiliki kapasitas lebih rendah dari debit tersebut sehingga tidak mampu mengalirkan limpasan secara aman. Oleh karena itu, sejumlah segmen saluran perlu dilakukan re-desain untuk meningkatkan kapasitas tampung dan mengurangi potensi genangan. Penelitian ini memberikan rekomendasi teknis perbaikan sistem drainase yang dapat diterapkan untuk mitigasi banjir di kawasan Desa Genta
Analisis Uji Nyala Biogas Dari Variasi Komposisi Sampah Organik
No full textThe problem of environmental pollution caused by waste, especially in urban areas,
is a serious issue that requires innovative solutions. Organic waste, especially food
waste, is a major component of household waste that can be utilized to produce
renewable energy, such as biogas. Biogas is produced through an anaerobic
fermentation process that produces methane (CH4) as the main component, as well
as carbon dioxide (CO2) and small amounts of other gases. This study aims to
analyze the effectiveness of utilizing organic waste in the form of food waste as a
raw material for biogas, by testing the quality of the flame and the resulting methane
content. The method used involves fermenting organic waste in a biogas reactor with
controlled temperature, pH, and fermentation time to optimize yield. The resulting
biogas is expected to reduce the volume of waste entering landfills (TPA), reduce
greenhouse gas emissions, and become an environmentally friendly and sustainable
energy alternative. This research is also expected to contribute to reducing
dependence on fossil fuels and support the implementation of simple waste
processing technologies that are easily adopted in various regions
Efektivitas Sistem Praotorisasi Peresepan Antibiotik Pasien Rawat Inap Di RSUD Bendan Kota Pekalongan
Full text linkAntimicrobial resistance (AMR) is a global threat that contributes to increased morbidity, mortality, and healthcare costs. One of the key strategies in the Antimicrobial Resistance Control Program (Program Pengendalian Resistensi Antimikroba/PPRA) is the implementation of antibiotic prescription pre-authorization, particularly for broad-spectrum and last-line antibiotics. However, empirical evidence regarding the effectiveness of electronic medical record (EMR)–based pre-authorization systems in type C/D hospitals remains limited. This study aimed to analyze the effectiveness of an EMR-based antibiotic prescription pre-authorization system in improving the rational use of antibiotics among hospitalized patients at RSUD Bendan Kota Pekalongan. This study employed a quasi-experimental design with a pretest–posttest approach without a control group. The sample consisted of 186 patients in the pre-implementation period and 189 patients in the post-implementation period (February–July 2025). The effectiveness of the system was evaluated using five indicators: quantity of antibiotic use based on Defined Daily Dose (DDD), quality of antibiotic use assessed by the Gyssens method, length of stay (LOS), incidence of multidrug-resistant organism (MDRO) infections, and antibiotic expenditure efficiency. Data analysis was performed using the Mann–Whitney test, independent t-test, and Chi-square test according to data distribution. The results showed that the mean quantity of antibiotic use (DDD) increased from 2.30 ± 2.32 before implementation to 2.50 ± 1.92 after implementation of the pre-authorization system, with a statistically significant difference (Mann–Whitney test, p = 0.044). The quality of antibiotic use improved significantly, as indicated by an increased proportion of rational antibiotic prescriptions (Gyssens category 0) after implementation of the pre-authorization system (Chi-square test, p < 0.05). The length of hospital stay decreased significantly following system implementation (Mann–Whitney test, p < 0.05). The incidence of MDRO infections also decreased after implementation of the pre-authorization system (Chi-square test, p < 0.05). From an economic perspective, the mean antibiotic expenditure decreased from IDR 6,873,485.33 ± 733,936.79 to IDR 6,322,673.67 ± 684,051.64; however, this reduction was not statistically significant (independent t-test, p = 0.395). In conclusion, the EMR-based antibiotic prescription pre-authorization system is effective in improving the quality and rational use of antibiotics, reducing length of hospital stay, and controlling MDRO incidence, although it has not yet demonstrated statistically significant antibiotic cost efficiency. This system has the potential to serve as a digital PPRA implementation model for regional hospitals
Studi Evaluasi Perbedaan Iradiasi Prediksi dengan Aktual pada Sistem PLTS
No full textThis study investigates the causes of discrepancies between predicted irradiation both for Global Horizontal Irradiation (GHI) and Global Tilted Irradiation (GTI) towards measured irradiation data from photovoltaic (PV) systems located in Jakarta, Bekasi, Karawang, Jombang, and Pasuruan. The analysis focuses on geographically proximate systems to minimize external variability and enable assessment of local atmospheric influences and system-specific operational characteristics. Weather variability associated with aerosol dynamics, caused by industrial activity and fossil-fuel-based transportation, is identified as a potential source of increased uncertainty, although it is not regarded as a primary conclusion. The inherent complexity of tropical meteorological conditions further contributes to irradiation variability and challenges the stability of prediction models. An evaluation of meteorological database quality was conducted through PVsyst simulation to assess the impact of estimated data accuracy, comparing two widely used data providers, Solargis and Meteonorm, against field measurements for the February–March 2025 period. The results demonstrate that Solargis consistently provides more accurate irradiation estimates than Meteonorm, although both dataset issue overestimation tendency according to Relative Mean Bias Error (rMBE). Additionally, the study highlights the further degradation of prediction reliability mainly caused by system management, particularly sensor failures that resulted in partial data loss. Such data gaps led to error accumulation, reflected in elevated Root Mean Square Error (rMSE) values, as evidently shown in nearby sites, Pasuruan and Jombang PV systems, where Solargis-based GHI rMSE values in February respectively reached 7.47 kWh/m² and 9.51 kWh/m², whereas for GTI were at 0.41 kWh/m2 and 1.4 kWh/m2, respectively. These values correspond to longer sensor fault durations. These findings emphasize that, beyond the selection of meteorological databases, data recording quality and system management practices can substantially amplify prediction errors in tropical PV systems
Analisis Framing Pemberitaan Bencana Banjir Bekasi Dalam Media Online CNN Indonesia Maret 2025
No full textThis study aims to explore and understand how online media constructs the reality of disasters, with a focus on the Framing Analysis of the Bekasi Flood Disaster News that hit in March 2025 on CNN Indonesia's online media. The flood disaster in Bekasi on March 4, 2025, is a crucial issue with a wide impact and is considered more severe than the previous year, so that the news has a great potential to influence public perception. The main objective of this study is to analyze the frames used by CNN Indonesia in reporting the disaster, specifically related to problem definition, cause diagnosis, moral judgment, and solution recommendations based on Robert N. Entman's framing model. The method used is qualitative descriptive research, by taking five news articles published by CNN Indonesia from March 4, 2025 to March 8, 2025 as primary data through documentation and purposive sampling techniques. The results of the study show that CNN Indonesia consistently uses the four elements of Entman's framing in its news. Key findings indicate a progressive shift in framing patterns, with the initial diagnosis of disaster causes pointing to natural factors such as extremely high rainfall intensity, but then shifting to a structural critique highlighting spatial planning failures and upstream and downstream issues. This conclusion demonstrates the crucial role of the media in reconstructing the reality of disasters. Media not only serves as a source of information but also as a narrative agent that selectively constructs narrative components (framing), thereby influencing public perspectives and interpretations of government actions, responsibilities, and appropriate solutions to address disasters
Transformasi Hukum Bisnis Di Era Digital: Implikasi Hukum Dan Etika Dalam Penggunaan Teknologi Blockchain Dalam Transaksi Bisnis
No full textChanges in business transactions in Indonesia are affected by the development of technology used by transaction actors. This has led to a change in the conventional business transaction system towards digital business transactions. This change requires strengthening from both the government sector and the transaction actor sector. The objectives of this research are 1) Analyzing the legal implications of using blockchain technology in business transactions in the digital era in Indonesia and 2) Explain the application of business ethics and the challenges of using blockchain technology to ensure transparency and security in digital transactions. The research method used by the author is a qualitative method with a normative juridical research type. The results of this study are the implications of changes in business transactions towards digital in Indonesia due to the widespread use of blockchain technology and for this change the government issued regulations to guarantee digital transactions carried out by the community. Business ethics supports a favorable business environment related to the use of blockchain technology, and business ethics can minimize the risks and challenges associated with blockchain use. Therefore, support for the enforcement of business ethics is needed from the government, blockchain technology developers, and business transaction participants
Studi Perbandingan Kekuatan Sambungan Pengelasan Gmaw dan Smaw Pada Material Baja ST37
Full text linkintegral part of the industrial world because it plays a vital role in the engineering
and production of metal components. Metal joining through welding is generally
carried out at specific positions according to the design and needs of the structure.
Shielded Metal Arc Welding (SMAW), also known as electric arc welding, is a
welding process that melts the parent metal and electrode with the heat generated
by an electric arc. Furthermore, Gas Metal Arc Welding (GMAW) is a welding
method that uses a continuously fed electrode wire as filler metal and a shielding
gas to protect the weld area from air contamination during the welding process
Perlindungan Hukum Terhadap Anak Korban Eksploitasi Seksual Komersial (ESKA) Melalui Aplikasi Kencan Online (Studi Kasus di Kejaksaan Negeri Sragen)
Full text linkCommercial Sexual Exploitation of Children (CSEC) has evolved alongside rapid digital advancements, particularly through the misuse of online dating applications that enable offenders to approach, manipulate, and exploit minors for sexual purposes. This study aims to analyze the legal protections provided by the Sragen District Prosecutor’s Office for child victims of CSEC facilitated through online dating platforms, as well as to identify the challenges encountered in the implementation of these protections. Using an empirical juridical method combining interviews and literature review, the findings show that the Prosecutor’s Office strives to ensure legal assistance, safeguard the rights of victims, and coordinate with various supporting institutions throughout the handling process. However, these efforts face several obstacles, including low digital literacy among children and parents, limited willingness to report cases, economic vulnerability, and regulatory frameworks that are not yet fully responsive to technology-based crimes. This study highlights the need for stronger inter-agency collaboration, improved digital education for the public, and optimized enforcement of relevant legislation as strategic measures to enhance legal protection for children against the growing threat of commercial sexual exploitation in digital spaces
Sanksi Hukum Terhadap Orang Tua Dalam Pemberian Izin Penggunaan Sepeda Listrik Kepada Anak Di Bawah Umur
Full text linkThe development of transportation technology in Indonesia has introduced electric bicycles as a new means of mobility that is practical, efficient, and environmentally friendly. However, the widespread use of electric bicycles by minors raises various legal and safety issues, particularly when parents grant permission without supervision. This study aims to determine the legal policies governing the use of electric bicycles by minors and the forms of parental legal accountability for such permission. The research method used is normative legal research (doctrinal) with a descriptive analytical approach, utilizing primary, secondary, and tertiary legal materials such as laws and regulations, legal literature, and official documents. Data analysis was conducted qualitatively by linking the theory of legal responsibility and child protection to the phenomenon of electric bicycle use. The results of the study indicate that legal regulations regarding electric bicycles in Indonesia are still unclear and comprehensive. Law Number 22 of 2009 concerning Traffic and Road Transportation does not explicitly regulate the category of electric bicycles, while Minister of Transportation Regulation Number 45 of 2020 only regulates technical aspects without specifying sanctions for violations. Parental legal responsibility can be reviewed from three aspects, namely: (1) civil, based on Article 1367 of the Civil Code which requires parents to compensate for losses due to negligence in supervision; (2) criminal, based on Articles 359 and 360 of the Criminal Code if parental negligence causes an accident; and (3) administrative, in the form of a warning or fine according to traffic regulations. This study confirms that parents have a moral, social, and legal responsibility to ensure the safety of children in using electric bicycles. The application of legal sanctions to parents is also a form of child protection and an effort to increase public legal awareness of traffic safety