E-Journal Politeknik Negeri Cilacap
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Pengembangan Transportasi Solo: Langkah Menuju Masa Depan Berkelanjutan
Get PDFMakalah ini mengeksplorasi sistem transportasi umum di Kota Surakarta dalam konteks Tujuan Pembangunan Berkelanjutan (SDGs). Latar belakang penelitian ini berfokus pada peran transportasi dalam mengurangi emisi karbon dan meningkatkan kualitas hidup. Tujuannya adalah menganalisis kondisi transportasi saat ini, menilai kinerja energi, dan memberikan rekomendasi untuk pengembangan berkelanjutan.
Metode penelitian menggunakan studi pustaka dengan analisis data sekunder dari jurnal, laporan, dan kebijakan terkini. Prosedur meliputi penelusuran dan analisis literatur untuk mengidentifikasi isu utama dan tren integrasi transportasi publik. Teknik analisis kualitatif diterapkan untuk mensintesis data dan menginterpretasikan temuan dalam konteks lokal Surakarta.
Hasil penelitian menunjukkan bahwa meskipun terdapat inisiatif positif, seperti Batik Solo Trans (BST) dan feeder, tantangan signifikan masih ada, termasuk penggunaan bahan bakar fosil dan infrastruktur yang belum memadai. Kesimpulan menyoroti perlunya peningkatan efisiensi energi dan integrasi moda transportasi. Rekomendasi mencakup modernisasi armada, penggunaan energi terbarukan, dan peningkatan aksesibilitas untuk mendukung keberlanjutan.
Penelitian ini menyarankan langkah strategis untuk meningkatkan transportasi berkelanjutan, termasuk kerjasama multistakeholder dan kebijakan insentif penggunaan transportasi umum
RANCANG BANGUN PEMBUATAN MESIN PENCACAH SAMPAH PLASTIK MINIMALIS
Get PDFA plastic waste shredder is a tool used to shred or crush plastic into small pieces using a cutting knife mounted on a shaft connected via a pulley and belt transmission to a motor. This study is an experimental study to design a waste shredder with a more minimalist design that uses a 1000 RPM washing machine dryer dynamo drive motor, but aims to be able to participate in overcoming the current plastic waste problem. The results of the study showed that this machine with a 1000 RPM washing machine dynamo drive motor can only crush PET plastic beverage bottle waste that must be cut into pieces first to avoid stopping the machine and slipping material. Based on these results, it can be concluded that this machine is only intended for shredding thin PET plastic bottles
PERANCANGAN TRANSMISI MESIN PEMBUAT PAGAR KAWAT HARMONIKA
Get PDFZig-zag wire or what is usually caleed harmonica wire can be used to make fences. Making harmonica wire is doen by bending the wire into a zig-zag shape. The process of making harmonica wire fences can be used as a home industry production. Therefore, the aim of this research is to design the transmission components of the harmonica wire fence making machine by calculating the machine elements in the transmission. The research method uses the VDI 2222 method approach. The design results are in the form of a harmonica wire fence making machine. The results of calculating the machine elements on the harmonica wire fence making machine have results including the transmission pulley used, namely type A with sizes 4 inches and 14 inches, the v-belt used is type A belt with a belt circumference length of 76 inches. Meanwhile, the diameter of the shaft used in the harmonica wire fence making machine is 25 mm with S45C material and the estimated force required in bending the the wire is 7.27 N
APLIKASI CVT PADA SEPEDA MOTOR LISTRIK (SEMOLI) GENERASI 2
Get PDFThe trend of using electric motorbikes to drive two-wheeled vehicles in Indonesia has started to increase. This is because the increasing public awareness of the benefits of electric vehicles is linked to the decreasing fossil energy reserves. Apart from that, electric vehicles are an environmentally friendly means of transportation because they do not cause air pollution. Based on previously research SEMOLI Generation 1, it is known that the use of a sprocket and chain transmission model on electric motorbikes produces less than optimal performance when used on flat roads, because on flat roads there is no need for large torque. The aim of this SEMOLI Generation 2 research is to conduct experiments using a CVT transmission which is predicted to be able to provide large torque when the road conditions are uphill, and able to provide higher speeds when the road conditions are flat. The research stages carried out successively are: conducting studies, selecting transmissions, assembling, fabricating, designing frames and swing arms, testing, and preparing documents. Based on the test results, it was found that using a CVT was able to increase maximum speed on both horizontal and uphill road conditions. This increase is because CVT has a wide transmission comparison range, so it is able to overcome uphill and horizontal road conditions
Grand Design and Economic Analysis of Solar-Wind Hybrid Renewable Energy Systems in MSTP Jepara
Get PDFMarine Science Techno Park (MSTP) Jepara is a center of technology implementation aimed to encourage community economy development in the maritime sector. At present, Marine Science Techno Park (MSTP) Jepara’s electrical energy source is supplied by Perusahaan Listrik Negara (PLN), with coal-powered steam turbine generators as the main source of electrical energy generation. Therefore, a cleaner and more sustainable means of electrical energy generation is needed to fulfill the high energy demand. With this in mind, Universitas Diponegoro, as the proposer, in collaboration with MSTP Jepara, as the recipient, proposes the initiation of Hybrid Renewable Energy Systems (HRES) Power Plant construction as a way of obtaining an environmentally friendly and sustainable source of energy in this research as well as addressing the issues in the previous HRES simulations and implementations. This article will discuss various scenarios, their feasibility for implementation, and the economic returns gained from HRES installation on-site
Comparison of The Dempster Shafer Method and Bayes\u27 Theorem in The Detection of Inflammatory Bowel Disease
Get PDFThis study discusses the comparison of the Dempster-Shafer method and Bayes\u27 theorem in the process of early detection of inflammatory bowel disease. Inflammatory bowel disease, better known as intestinal inflammation, attacks the digestive tract in the form of irritation, chronic inflammation, and injuries to the digestive tract. Early signs of inflammatory bowel disease include excess abdominal pain, blood when passing stools, acute diarrhea, weight loss, and fatigue. The Dempster-Shafer method is a method that produces an accurate diagnosis of uncertainty caused by adding or reducing information about the symptoms of a disease. Meanwhile, Bayes\u27 theorem explains the probability of an event based on the factors that may be related to the event. This study aims to measure the accuracy of disease detection using the Dempster-Shafer method compared to the probability of occurrence of the disease using Bayes\u27 theorem. The results of calculating the level of accuracy show that the Bayes Theorem method is better at predicting inflammatory bowel disease with a probability of occurrence of disease in the tested data of 75.9%.Penelitian ini membahas tentang perbandingan metode dempster shafer dan teorema bayes pada proses deteksi dini penyakit inflamasi usus. Penyakit inflamasi usus atau yang lebih dikenal dengan radang usus adalah penyakit yang menyerang saluran pencernaan berupa iritasi, peradangan kronis, hingga luka pada saluran pencernaan. Tanda awal penyakit inflamasi usus antara lain nyeri perut berlebih, darah keluar pada saat buang air besar, diare akut, berat badan semakin menurun dan kelelahan. Metode dempster shafer adalah metode yang menghasilkan diagnosis yang akurat dari sebuah ketidakpastian yang disebabkan oleh ditambah atau dikuranginya informasi tentang gejala sebuah penyakit. Sedangkan teorema bayes menerangkan tentang peluah sebuah kejadian yang didasarkan kepada faktor-faktor yang mungkin berkaitan dengan kejadian tersebut. Penelitian ini bertujuan untuk mengukur tingkat akurasi deteksi penyakit menggunakan metode dempster shafer yang dibandingkan dengan peluang munculnya penyakit tersebut menggunakan teorema bayes. Hasil perhitungan tingkat akurasi menunjukkan bahwa metode Teorema bayes lebih baik dalam memprediksi penyakit inflamasi usus dengan probabilitas kemunculan penyakit terhadap data yang telah diuji sebesar 75.9%
Analisis Penambahan Methanol 5%, 10% dan 15% Terhadap Torsi, Daya dan Exhaust Gas Temperature (EGT) Mesin Bensin 150 CC Berbahan Bakar Pertamax
Get PDFIndonesia is one of the countries that uses the most motorized vehicles, which increases air pollution and fuel crises. Using biofuel is one solution to overcome this problem. Methanol is used as a mixture of Pertamax to produce environmentally friendly and renewable biofuel. This is because methanol has high octane and oxygen. Mixing methanol in Pertamax was carried out to analyze the impact of Torque, Power, and Exhaust Gas Temperature (EGT) of a 150cc petrol engine. Methanol 5%, 10%, and 15% was mixed into Pertamax with engine speed variations of 1000, 2000 and 3000 rpm. Dynotest is used to measure engine performance and thermocouples to measure EGT. Test results show the highest increase in engine torque and power of up to 25% at a speed of 2000 rpm with the PM15 mixture compared to P100. The highest reduction in EGT value occurred when using the PM15 mixture at a speed of 1000 rpm up to 28% compared to P100. This shows that the addition of methanol to Pertamax increases torque and power and reduces the EGT of the gasoline engine.
 
Analisis Desain Boom, Arm, dan Bucket Alat Peraga Mini Excavator Zhugimada dengan Metode Elemen Hingga
Get PDFAn excavator is heavy equipment with a hydraulic system as the main drive and along with its uses, many parties have developed it as a means of production and as a means of learning. The education world needs excavators as learning tools and practice media are currently constrained by price when commercial units are used. Therefore, a learning media that is more compact but does not abandon the main essence of learning is needed. This research aims to analyze the front attachment design of the Zhugimada mini excavator using the finite element method. The research was carried out using the ANSYS application for the static load simulation process and testing was carried out with a bucket containing sand weighing 25 kg and using three hydraulic cylinders. The simulation results show that the maximum von Mises stress value in the bucket component is 43.226 MPa and the maximum deformation is 0,51285 mm in the tooth bucket so in general the design of the Zhugimada mini excavator front attachment components can be declared safe and can be continued in the fabrication process.
 
Pengembangan Aplikasi Penyewaan Mobil Menggunakan Metode Prototyping dengan Online Payment Gateway Midtrans
Get PDFCar rental has become one of the most profitable industries, as cars have become an essential means of transportation for various societal needs, such as family activities and work. Many car rental companies still rely on conventional methods for promotions and reservations. There is one car rental place whose rental and promotion system still uses WhatsApp chat and telephone or comes directly to the rental. A website-shaped system is crucial as a company platform to showcase available vehicles, enable online transactions for rentals, and facilitate easy and convenient payments. The development of this website involves prototyping with PHP and MySQL programming languages, and the payment system incorporates the Midtrans payment gateway. The system is tested using Blackbox and User Acceptance Testing (UAT). This website\u27s development aims to simplify the booking process for customers and enhance the company\u27s ability to manage vehicle data and payments efficiently. Following the system\u27s construction, testing is conducted, with the results of the UAT indicating a user satisfaction score of 90.8%. Based on the evaluation, the majority of users strongly agree with the developed application.
 
Brake Thermal Efficiency dan Exhaust Gas Temperature Mesin Bensin Berbahan Bakar Gasoline-Butanol
Get PDFThe development of butanol as a gasoline additive is encouraged by the government to reduce pollution and the fuel crisis. This is because butanol is a green fuel that is environmentally friendly and can be produced. In addition, the octane number and high oxygen concentration in butanol optimize engine performance and improve exhaust emissions. This research correlates engine power and Brake specific fuel consumption (BSFC) with the BTE of gasoline-butanol-fueled engines and identifies the content of Nox compounds in exhaust gases through engine Exhaust Gas Temperature (EGT). The percentage of butanol in gasoline is 5% -15%. Engine speed from 1000-3000 rpm. Dynotest is used to measure BTE while the thermocouple is used to measure exhaust gas temperature. This research proves that the addition of butanol increases energy absorption which is converted into power with effective fuel consumption which means BTE increases. The highest BTE increase was 21.7% in the B15 blend. EGT decreased by 8.6% in the B16 mixture compared to B0. This identifies that the concentration of Nox in the exhaust gas also decreases