Publikasi Universitas Mercu Buana
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A Comparative Study of Machine Learning with Statistical Feature Selection for Risk Detection of Diabetic
No full textElevated glucose levels in the circulation are indicative of diabetes, a chronic medical condition. Prolonged unregulated blood glucose levels pose a significant risk of severe consequences, including renal failure, myocardial infarction, and lower limb amputation. The objective of this study is to conduct a comparative analysis of SVM, Naive Bayes, XGBoost, Random Forest, and ANN models in order to forecast the occurrence of diabetes. The research methodology comprises seven primary stages: (1) literature review, (2) data collection, (3) exploratory data analysis (EDA), (4) data preprocessing, (5) feature selection, (6) model development, and (7) model evaluation and comparison. The XGBoost model is the most suitable option, as indicated by the model evaluation results. The XGBoost model achieved a precision of 0.88, a recall of 0.87, and an accuracy of 0.8690. The XGBoost model has a RMSE of 0.3620 and a MSE of 0.1310
Analysis of Adhesion Strength and Surface Hardness of 6061 Aluminum Alloy Resulting from Powder Coating with Variations in Sandblasting Process Time
No full textThe success of powder coating is highly dependent on specimen preparation, one of which is sandblasting. This study aims to analyze the effect of variations in sandblasting time on surface roughness, adhesion strength, and surface hardness of powder coated 6061 aluminum alloy. The research method used was quantitative experimental. Specimens measuring 50 mm × 50 mm × 3 mm were sandblasted with time variations of 15 seconds, 35 seconds, and 55 seconds, and their surface roughness was measured. Furthermore, the specimens that have undergone the sandblasting process will be continued for the powder coating process and tested for adhesion strength and surface hardness. The results showed that the highest roughness, adhesion strength, and surface hardness were found in the 55-second variation with a roughness value of 6.18 µm, an adhesion strength value of 5.63 MPa, and a surface hardness value of 14.45 VHN. This shows that the longer the sandblasting time, the higher the surface roughness, the higher the adhesion strength and the surface hardness.The success of powder coating is highly dependent on specimen preparation, one of which is sandblasting. This study aims to analyze the effect of variations in sandblasting time on surface roughness, adhesion strength, and surface hardness of powder coated 6061 aluminum alloy. The research method used was quantitative experimental. Specimens measuring 50 mm × 50 mm × 3 mm were sandblasted with time variations of 15 seconds, 35 seconds, and 55 seconds, and their surface roughness was measured. Furthermore, the specimens that have undergone the sandblasting process will be continued for the powder coating process and tested for adhesion strength and surface hardness. The results showed that the highest roughness, adhesion strength, and surface hardness were found in the 55-second variation with a roughness value of 6.18 µm, an adhesion strength value of 5.63 MPa, and a surface hardness value of 14.45 VHN. This shows that the longer the sandblasting time, the higher the surface roughness, the higher the adhesion strength and the surface hardness
DESAIN DAN ANALISIS VELG CAST WHEEL TIPE MT DAN WM DENGAN VARIASI SPOKE MENGGUNAKAN MATERIAL ALUMUNIUM ALLOY TIPE 7050-T7651 DAN 7075-T6 (SN)
No full textThe automotive industry is growing rapidly. Produce changes, especially in the level of Safety and comfort. Vehicle manufacturers are competing to improve the quality of the components used in these vehicles. One aspect of Safety and comfort is the Safety and comfort of the vehicle's wheels, in addition to an attractive wheel design. Therefore, the material used on the wheels is high-quality, with precise calculations and correct designs. Vehicle wheels are one of the main components in vehicles because vehicles without wheels cannot run. There are two kinds of wheels: spoke wheels (spoke wheels) and cast wheels. This study aims to determine how to design cast wheel wheels type MT and WM and analyze material comparison and the number of spokes based on simulation using the software. The simulation results show the design of the MT-type cast wheel: the maximum stress value on the 7050-T7651 aluminum alloy material is 426.784 MPa, and on the 7075-T6 (SN) aluminum alloy material, which is 426.784 MPa, it is still within the safe limit because it is still below the value yield strength. In the design of the WM-type cast wheel, the maximum stress value on aluminum alloy type 7050-T7651 is 362085 MPa. On aluminum alloy material type 7075-T6 (SN), which is 362,085 MPa, it is still within safe limits because it is still below the yield strength value. The maximum strain value for the two materials used is 3.987 x 100-6, and the maximum displacement value for both materials is 9.959 x 100-4. The highest factor of safety value on WM 5 spoke wheels with aluminum alloy type 7050 –T7651 is 1.76Perkembang industri otomotif yang semakin pesat. Mengahasilkan perubahan terutama pada tingkat keamanan dan kenyamanan. Pabrikan kendaraan berlomba-lomba meningkatkan kualitas komponen yang digunakan pada kendaraan tersebut. Salah satu aspek keamanan dan kenyamanan adalah keamanan dan kenyamanan vleg kendaraan disamping desain velg yang menarik. Maka dari itu bahan matrial yang digunakan pada velg menggunakan material kualitas tinggi dengan perhitungan yang tepat dan desain yang benar. Velg kendaraan merupakan salah satu koponen utama pada kendraan, karena kendaraan tampa menggunakan velg tidak akan bisa berjalan. Terdapat dua macam velg, yaitu velg jari-jari (spoke wheel) dan velg cast wheel. Penelitian ini bertujuan untuk mengetahui cara mendesain velg cast wheel tipe MT, WM dan analisis perbandingan material dan jumlah spoke berdasarkan simulasi mengunakan software. Hasil simulasi menunjukan desain velg cast wheel tipe MT nilai tegangan maksimal pada material alumunium alloy tipe 7050-T7651 yaitu 426, 784 Mpa dan pada material alumunium alloy tipe 7075-T6 (SN) yaitu 426, 784 Mpa masih dalam batas aman karna masih dibawah nilai yield strenght. Desain velg cast wheel tipe WM nilai tegangan maksimal pada material alumunium alloy tipe 7050-T7651 yaitu 362,085 Mpa dan pada material alumunium alloy tipe 7075-T6 (SN) yaitu 362,085 Mpa masih dalam batas aman karna masih dibawah nilai yield strenght. Nilai regangan maksimal pada kedua material yang digunakan yaitu 3,987 x 100-6 dan nilai displacment maksimal pada kedua material yaitu 9,959 x 100-4. Nilai factor of safety tertinggi pada velg WM 5 spoke dengan material alumunium alloy tipe 7050 –T7651 yaitu 1, 76. Kata kunci: Desain velg cast wheel tipe MT dan WM, Material, Jumlah Spoke
DESIGN ANALYSIS OF THE STRENGTH OF STRAIGHT (VERTICAL) PIPE CONNECTIONS USING MODIFIED FLANGES IN DEEP WELL PUMP PIPE INSTALLATIONS
No full textStrength Analysis of Straight (Vertical) Pipe Connections Using Modified Flange on Deep Well Pump Pipe Installation is an important part of the oil and natural gas industry, because it functions to drain fluid from the well to the oil gathering station. Well pump pipelines must be well designed to ensure safety and operational efficiency. One of the important components in the well pump pipeline design is the straight (vertical) pipe connection using a modified flange. The strength analysis of this straight pipe connection is carried out to determine how the modified flange affects the strength of the pipe connection. The method used is a design analysis of the strength of straight pipe joints using modified flanges with reference to international codes and simulations using Solidworks software. The results show that the flange must be modified because it is for the cable line and adjusts to the diameter of the well which is 8' in diameter. The strength of straight pipe joints is also affected by pipe diameter, operating pressure, and pipe material type. The conclusion of this analysis is that the modified flange can reduce the strength of the straight pipe connection, so it requires proper consideration and calculation. Therefore, the modified flange should be considered in the well pump pipeline design to ensure safety and operational efficienc
Experimental Investigation of the Corrosion Rate of Factory-Original Motorcycle Exhausts in NaCl Solution and Natural Seawater
No full textAbstract-- Corrosion is a significant factor that decreases the performance and service life of motorcycle components, especially exhaust pipes that are directly exposed to the environment. This study aims to analyze and compare the corrosion rate of factory-made motorcycle exhausts when exposed to two corrosive media: a 3.5 wt% sodium chloride (NaCl) solution and natural seawater. An immersion test was conducted under laboratory conditions for seven days (168 h) using eight AISI 1010 coupons (2 × 2 cm). Four specimens were immersed in seawater, and four in 3.5 % NaCl. After pickling, each coupon was weighed, immersed, cleaned, and re-weighed. Mass loss was converted to a corrosion rate using the gravimetric method and expressed in millimeters per year (mm· year¹). The average corrosion rate in seawater was 4,121.9 mm/year, whereas in 3.5% NaCl it was 71.7 mm/year. The significantly higher rate in seawater is attributed to additional ions, such as magnesium, calcium, and sulfate, that accelerate electrochemical reactions. These findings underscore the importance of adequate surface protection for exhaust pipes, particularly for motorcycles operating in coastal or high-humidity environments, and serve as a basis for developing corrosion-resistant materials or coatings for automotive components
COMPARATIVE ANALYSIS OF THE EFFICIENCY OF HYBRID AND NON-HYBRID CARS: EFFECT OF WEIGHT, TORQUE AND PRICE
No full textFuel serves as the primary energy source for motor vehicles, enabling them to move. Although it has been the primary energy source for several centuries, Fuel has led to various environmental issues. One of its negative impacts is that, when burned, Fuel produces carbon dioxide (CO2), a significant contributor to global climate change. Currently, this petroleum-based energy is facing a crisis. Hybrid vehicles present a solution to address this petroleum energy crisis. Recently, hybrid cars have become popular in the modern automotive industry due to their numerous advantages, especially fuel efficiency and emissions. Hybrid vehicle technology combines conventional engine technology that uses Fuel with electric motor technology. This study provides a comprehensive comparative analysis between hybrid and non-hybrid cars, focusing on fuel efficiency, vehicle weight, torque, and price parameters. The aim is to assess the economic feasibility of hybrid vehicles compared to non-hybrid cars. The methodology used is a quantitative comparative study of several hybrid and non-hybrid car models within the same class. Performance data were systematically collected from reliable sources and analyzed under standard conditions, covering various price segments ranging from 600 million to 1.6 billion rupiahs. Statistical analysis was conducted to compare fuel efficiency, torque, and vehicle weight between the two types of cars and evaluate the economic implications of these differences. The study results indicate that hybrid cars achieve significantly higher fuel efficiency, averaging 18–22 km/l, compared to 10–14 km/l for non-hybrid models (p < 0.05). This efficiency increase persists despite increasing torque and vehicle weight, demonstrating that hybrid technology improves performance without sacrificing efficiency. Additionally, cost analysis suggests that although the initial price of hybrid cars is higher, fuel savings can offset the price difference in the long term. This research is expected to serve as a reference for consumers considering cost and energy efficiency when choosing hybrid and non-hybrid cars
Natural Inhibitors for Corrosion Protection of 6061 Aluminum Alloy: A Review
No full text6061 aluminum alloys are widely used in automotive, marine, and aerospace industries, yet their high susceptibility to corrosion in acidic and chloride environments remains a challenge. Bio-based inhibitors from natural sources have emerged as sustainable alternatives to toxic synthetic chemicals. This review synthesizes findings from published studies on AA6061 alloys and composites, integrating evidence from Potentiodynamic Polarization (PDP), Electrochemical Impedance Spectroscopy (EIS), and Scanning Electron Microscopy (SEM). Cross-study evaluations show that inhibition efficiency depends on inhibitor type and mechanism. Reports indicate that Boswellia serrata provides only moderate protection (~70%) due to weak physiosorbed films that are unstable under flow, whereas Alocasia odora achieves higher efficiency (~94% in HCl) through chemisorption with cathodic inhibition. Aerva lanata demonstrates ~88% efficiency in chloride-based fiber-metal laminates via polyphenolic adsorption, while glutathione provides ~80% protection at 0.75 mM through multisite coordination. Pectin consistently achieves the highest efficiency (~95% in mild acidic media) by forming compact polymeric films that increase charge-transfer resistance and reduce double-layer capacitance. This synthesis indicates that chemisorption-based inhibitors (e.g., pectin, Alocasia) generally outperform physisorption-based systems (e.g., Boswellia) because they form stronger and more stable films. Reported studies highlight both advantages and limitations: natural inhibitors are effective and eco-friendly, but most evaluations remain short-term and laboratory-based. Key gaps include durability testing, advanced characterization (XPS, ToF-SIMS, Raman, AFM), galvanic effects in composites, and poor hydrodynamic stability of physisorption systems. Future work should explore hybrid strategies, synergistic multi-inhibitor approaches, and validation under real-sea conditions to enable scalable and industrially viable corrosion protection
Analisis Perancangan Sistem Informasi pada Perpustakaan Institut Teknologi Mitra Gama
No full textPerpustakaan sangat penting untuk membantu pendidikan, penelitian, dan pengembangan ilmu pengetahuan.Namun, masalah seperti pengelolaan data yang tidak terintegrasi, yang dapat menyebabkan pemrosesan yang terlalu lama, masih ada. Untuk mengatasi hal ini, sistem informasi kontemporer yang mampu mengelola data dan informasi dengan baik diperlukan. Tujuan studi ini adalah menganalisis dan mengoptimalkan sistem informasi suatu perpustakaan dengan menggunakan teknik Analisis Sistem Informasi (ASI), Diagram Konteks(CD), Diagram Flow Data (DFD), dan Diagram Hubungan Entitas (ERD). Metode ini membantu dalam memahami kebutuhan pengguna dan merancang struktur sistem informasi yang efisien. Penerapan sistem informasi ini diharapkan dapat membantu dalam memberikan layanan percetakan yang efisien dan dapat diandalkan
EKSPLORASI IDENTITAS KABUPATEN KUBU RAYA MELALUI ARSITEKTUR LOKAL
No full textIdentitas arsitektur Kabupaten Kubu Raya masih belum terdefinisi secara jelas, sehingga diperlukan upaya untuk mengidentifikasi dan memperkuat karakter arsitekturalnya. Penelitian ini bertujuan untuk mengeksplorasi dan mengidentifikasi elemen arsitektural dari bangunan lokal yang berkontribusi terhadap identitas daerah. Studi dilakukan pada tiga objek representatif, yaitu Kerajaan Kubu, Masjid At-Tamini, dan rumah tinggal lokal. Metode penelitian yang digunakan adalah studi kasus majemuk dengan pendekatan kualitatif. Analisis mencakup elemen sejarah, simbol dan makna, formal visual, fungsi ruang, konteks lingkungan, serta teknologi konstruksi. Hasil penelitian menunjukkan bahwa ornamen bangunan didominasi oleh empat motif utama yang dapat mengalami transformasi tanpa kehilangan modul dasarnya. Struktur bangunan menampilkan hirarki dengan elemen adiktif pada akses utama, serta tata letak pintu dan jendela yang membentuk simetri. Elemen ruang menunjukkan nilai hirarki yang ditandai dengan penggunaan dinding puadai. Selain itu, orientasi bangunan mengarah ke sungai, mencerminkan peran sungai dalam kehidupan sosial dan ekonomi masa lalu. Teknologi konstruksi tradisional juga berperan dalam membentuk identitas arsitektural daerah. Penelitian ini menegaskan bahwa identitas arsitektur Kubu Raya dipengaruhi oleh sejarah, budaya, dan lingkungan, yang tercermin dalam elemen-elemen desain arsitektural lokal
PEMETAAN FUNGSI DAN KEBUTUHAN RUANG PADA PUSAT REHABILITASI NARKOBA BERDASARKAN TEKNIK PLACE CENTERED MAPPING
No full textPenyalahgunaan narkoba merupakan permasalahan serius yang terus meningkat di Indonesia, yang berdampak pada berbagai aspek kehidupan sosial, kesehatan, dan ekonomi. Tingginya angka penyalahguna narkoba dalam 5 tahun terakhir turut mendapat perhatian dari berbagai pihak. Upaya rehabilitasi menjadi salah satu langkah penting dalam menangani permasalahan ini agar penyalahguna dapat pulih dan kembali berfungsi secara sosial di tengah masyarakat. Pusat rehabilitasi narkoba berperan penting dalam proses pemulihan penyalahguna zat dengan menyediakan fasilitas yang mendukung aspek medis, psikososial, dan aktivitas terapeutik. Namun, efektivitas rehabilitasi sangat bergantung pada perancangan ruang yang sesuai dengan kebutuhan pengguna. Penelitian ini bertujuan untuk memetakan fungsi dan kebutuhan ruang pada pusat rehabilitasi narkoba dengan studi kasus Balai Besar Rehabilitasi Badan Narkotika Nasional (BNN) di Bogor. Metode penelitian yang digunakan adalah pendekatan kualitatif dengan teknik Place-Centered Mapping melalui observasi fisik dan didukung wawancara. Analisis spasial dilakukan untuk memetakan fungsi dan kebutuhan ruang pada pusat rehabilitasi, sementara wawancara terhadap staf dilakukan untuk memvalidasi fungsi dan kebutuhan ruang. Hasil penelitian menunjukkan bahwa pusat rehabilitasi memerlukan zonasi ruang yang jelas untuk membedakan area perawatan medis, konseling, aktivitas sosial, serta rekreasi. Selain itu, fleksibilitas ruang, aksesibilitas, serta penciptaan lingkungan yang mendukung kesejahteraan psikologis menjadi aspek krusial dalam desain fasilitas rehabilitasi. Studi ini memberikan rekomendasi desain berbasis kebutuhan pengguna untu