Publikasi Universitas Mercu Buana
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Klasifikasi Kepribadian Introvert dan Extrovert Menggunakan Random Forest, Naïve Bayes, dan K-Nearest Neighbor
No full textKepribadian merupakan faktor penting yang memengaruhi cara individu berpikir, berperilaku, dan berinteraksi dalam kehidupan sosial. Salah satu dimensi utama dalam model Big Five Personality Traits adalah ekstraversi, yang merepresentasikan kecenderungan seseorang untuk bersosialisasi dan berinteraksi aktif dengan lingkungannya. Penelitian ini bertujuan mengembangkan model klasifikasi kepribadian introvert dan extrovert menggunakan tiga algoritma machine learning, yaitu Random Forest, Naïve Bayes, dan K-Nearest Neighbor (KNN). Dataset yang digunakan berjumlah 2.900 entri dengan delapan atribut perilaku sosial seperti waktu yang dihabiskan sendirian, frekuensi menghadiri acara sosial, ukuran lingkaran pertemanan, dan tingkat aktivitas di media sosial. Proses penelitian meliputi pembersihan data, transformasi variabel kategorikal, pembagian data secara stratifikasi (80:20), pembangunan model, serta evaluasi menggunakan metrik akurasi, precision, recall, F1-score, dan ROC-AUC. Hasil pengujian menunjukkan bahwa model KNN dengan k = 11 memberikan performa terbaik dengan akurasi 92,59% dan nilai ROC-AUC 0,9494, diikuti oleh Naïve Bayes dengan akurasi 92,24% (ROC-AUC 0,8988) dan Random Forest dengan akurasi 90,86% (ROC-AUC 0,9480). Kontribusi utama penelitian ini adalah memberikan analisis komparatif terhadap tiga algoritma yang mewakili paradigma pembelajaran berbeda, yaitu probabilistik, berbasis jarak, dan ensemble pohon keputusan, dalam konteks klasifikasi kepribadian berdasarkan dimensi ekstraversi. Hasil penelitian ini dapat menjadi dasar bagi pengembangan sistem prediksi kepribadian berbasis perilaku sosial yang efisien dan adaptif
Review of Improving Refrigeration Machine Performance by Adding Nanoparticles to the Refrigeration System Using Computational Fluid Dynamics (CFD) Simulation and Comparing it with Experimental Results
No full textIn this journal, the author reviews the performance improvement of vapor compression refrigeration machines by adding nanoparticles into the refrigeration system using CFD simulation. This study aims to determine the improvement of refrigeration machine performance by adding nanoparticles into the refrigeration system using CFD simulation and to compare the simulation results with the experimental results. Where the method used in this study is a literature review. The results of the literature study show that the dispersion of nanoparticle additives can affect the increase in the refrigeration system performance coefficient (COP) and can maximize thermal conductivity, heat transfer coefficient, and other heat transfer characteristics so that it can produce lower power consumption. Using the CFD simulation method, the highest increase in refrigeration system performance was obtained through the simulation of SiO2 + R134a nano refrigerants with a volume concentration of 4% and an increase value of 22.58%. From the experimental results, the highest value was obtained by Al2O3 + R134a nano refrigerants with a volume concentration of 0.5% and an increased value of 30.85%. The system's performance showed a significant improvement with the addition of nanoparticles. Therefore, the performance of the refrigeration machine with the addition of nanoparticles in the refrigerant fluid is higher than the system using pure refrigerant fluid (without nanoparticles)
ANALYSIS OF THE EFFECT OF PENSTOCK DIAMETER ON HYDROCOIL TURBINE PERFORMANCE IN SUKAJAYA VILLAGE, LEMBANG DISTRICT, WEST JAVA
No full textThe turbine used in this study is a reaction turbine called hydrocoil turbine. In hydrocoil turbines require penstock pipe components to support turbine performance, the size of the penstock pipe has its own potential. Errors in determining the diameter of the penstock can affect the performance of hydrocoil turbines. The purpose of this study is to perform penstock comparison using ansys with a diameter of 6 inches, 8 inches and 10 inches and determine the diameter of the penstock to get the best hydrocoil turbine performance. This study was conducted using Computational fluid dynamics (CFD) method which includes torque, turbine power, and efficiency, the results of the analysis of the calculation of the highest torque value obtained by the 10-inch penstock at 150 rpm rotation of 398.51 Nm, and the torque value obtained by the 8-inch penstock at 150 rpm rotation of 282.47 Nm, the lowest torque value obtained by the 6-inch penstock at 950 rpm rotation of 51,061 Nm. Then the highest power value obtained by the 10-inch penstock at 950 rpm rotation of 27279.53 Watts and the power obtained by the 8-inch penstock at 950 rpm rotation of 21861.41 Watts, the lowest power obtained by the 6-inch penstock at 950 rpm rotation of 5077.16 Watts. So that the highest efficiency value obtained by 10-inch penstock at 950 rpm rotation of 90.58% and the efficiency value obtained by 8-inch penstock at 950 rpm rotation of 72.59 %, the lowest efficiency value obtained by 6-inch penstock at 950 rpm rotation of 16.85 %. It can be concluded from the values already obtained, penstock with a diameter of 10 inches has the highest value to get the best turbine performance, followed by penstock diameter of 8 inches has the highest value Number 2 and penstock with a size of 6 inches has the lowest value, proven by the speed varied according to the diameter of the penstock and constant discharge indicates that the larger the diameter of the penstock will produce the best turbine performance
Design Analysis of a Disabled Tricycle Electric Bike Frame Using Finite Element Analysis (Fea)
No full textMobilization is very important to meet the needs that require someone to move or travel, especially for the disabled. One solution to help the disabled is to design flexible and safe vehicles for them. To find out whether the design is safe or not is by simulation Finite Element Analysis (FEA). This study was conducted to analyze three designs of electric bicycle frames for the disabled made using Solidworks software which is then simulated using Ansys Workbench software which produces output in the form of valuesvon mises stress, deformation, and safety factor. The selection of this design is based on simulation results which show that the von mises stress obtained was 62,669 MPa, its maximum deformation value of 0.32879 mm, and safety factor obtained a value of 6.6221. This simulation uses a load of 80 kg and there is an additional battery at the bottom weighing 10 kg. The simulation results show that design 3 provides the best performance, this is because the design obtains safety factor highest
FLEXURAL CHARACTERISTICS OF ROLL-WRAPPED GFRP COMPOSITE HOLLOW SQUARE TUBE
No full textThis research characterizes the bending behavior of hollow square tube glass fiber-reinforced polymer (GFRP) composites using the roll-wrapping method. CSM (Chopped Strand Mat) and WRM (Woven Roving Mat) glass fibers were chosen as reinforcing constituents with epoxy as the matrix. Glass fiber was chosen because it has strength, stiffness, lightness, corrosion resistance and high-temperature resistance. These properties can be utilized for frame and structural applications in various types of transportation equipment. The roll-wrapping technique was chosen for manufacturing GFRP composite hollow square tubes. The roll-wrapping technique is the simplest method and does not require a lot of money. The bending test using the Three Point Bending method is based on the ASTM D7264 test standard. In addition, macroscopic observations of the specimen's cross-section after experiencing a bending load are carried out to determine the product failure criteria. Bending tests were conducted on two types of GFRP composites, hollow square tube products produced from CSM and WRM fibers. The bending test results showed that the CSM fiber-reinforced composite has higher stress values (167.122 MPa) and strain (0.055%) compared to the WRM fiber-reinforced composite, which has stress values of 78.339 MPa and strain of 0.030%. The results of macro photo analysis show that random fiber composites dominate tensile failure while woven fiber composites dominate compressive failure. Failure analysis through macro photos is a critical process in determining the physical root cause of the proble
PLANT PHOTOTROPISM AS THE BASIS FOR DESIGNING INCLUSIVE LIGHTING IN SPACES FOR THE DEAF
No full textThis article explores a biomimetic architectural approach that applies the concept of plant phototropism as a conceptual foundation for designing inclusive lighting environments for individuals who are deaf or hard of hearing. Recognizing that deaf users rely on visual perception as their primary medium of communication, this study draws an analogy between the way plants move toward light and the way deaf individuals orient themselves within illuminated spaces. Supported by the multisensory theory in architecture (Spence, 2020), which asserts that spatial perception arises from the integration of multiple senses, this research employs qualitative and conceptual experimentation based on plant growth direction to develop lighting design principles that are even, adaptive, and responsive to visual communication needs. These principles are translated into architectural strategies such as the orientation of spaces toward natural light, the balanced distribution of artificial illumination, and the use of material reflectance, positioning phototropism as a biomimetic foundation for DeafSpace development that enhances both functionality and sensory experience
Sustainable Tourism Practices and Strategies in Living Museum Management: A Meta-Synthesis Systematic Review
No full textObjectives: This study explores sustainable tourism practices in living museum management, focusing on strategies that enhance visitor engagement while ensuring heritage preservation and contributing to sustainable development. It aims to identify key sustainability practices, their implementation, and outcomes, balancing visitor experience and cultural conservation.Methodology: A meta-synthesis systematic review was conducted on empirical studies related to sustainable tourism in living museums. The analysis incorporated highly reputable, peer-reviewed literature to identify patterns, best practices, strategies, and challenges in sustainability, particularly regarding environmental, cultural, and economic dimensions of living museum management.Finding: This study reveals that living museums effectively engage visitors through immersive experiences while advancing sustainable tourism. Key strategies include collaboration with local communities, cultural asset preservation, and environmentally responsible practices to minimise ecological impacts. Furthermore, a holistic approach integrating environmental, cultural, and economic sustainability strategies enhances their roles as heritage custodians and strengthens local development.Conclusion: Living museums provide immersive cultural experiences while balancing heritage conservation and visitor engagement. Their commitment to sustainability, through cultural preservation, ecological responsibility, and economic viability, ensures long-term resilience and meaningful community participation. By integrating comprehensive strategies, these institutions reinforce their role as protectors of heritage and catalysts for sustainable regional development
EFEKTIVITAS PENATAAN DAN SIRKULASI RUANG KOMUNAL DI DESA ADAT BAYUNG GEDE MENGGUNAKAN METODE SPACE SYNTAX
No full textDesa Adat Bayung Gede di Kecamatan Kintamani, Bangli, merupakan Desa Bali Aga dengan nilai sejarah dan budaya yang unik, sehingga memiliki potensi besar dalam pengembangan pariwisata. Meskipun berpotensi, desa ini belum memiliki perencanaan pengembangan wisata yang terstruktur dan berkelanjutan, yang sejalan dengan upaya Pembangunan Berkelanjutan (SDGs). Oleh karena itu, penelitian ini bertujuan untuk menganalisis efektivitas penataan ruang komunal publik, terutama dari segi penempatan, sirkulasi, dan visibilitas sebagai dasar perencanaan ruang publik yang mendukung kegiatan social dan pariwisata. Metode yang digunakan adalah teknik Space Syntax yang mampu mengevaluasi struktur spasial berdasarkan metrik konektivitas, integrasi, dan visibilitas. Hasil penelitian ini menunjukkan adanya hierarki spasial yang jelas; pusat-pusat utama seperti Pura Bale Agung, Pura Puseh Jro Kajangan, dan LPD Desa Bayung Gede memiliki nilai konektivitas dan integrasi tertinggi, menjadikannya titik simpul pergerakan dan interaksi sosial. Sebaliknya, fasilitas yang membutuhkan ketenangan (seperti sekolah dan pura tertentu) berada di lokasi dengan konektivitas terendah. Pola visibilitas juga menunjukkan area pusat dan ruang terbuka memiliki visibilitas tinggi, mendukung fungsi kegiatan publik. Kesimpulan dari penelitian ini adalah penataan ruang komunal publik di Desa Adat Bayung Gede dinilai efektif karena telah menciptakan hierarki spasial yang terorganisir dan fungsional. Pola ini berhasil mendukung aktivitas sosial, ekonomi, dan keagamaan dengan menempatkan fasilitas penting sesuai dengan kebutuhan aksesibilitas dan privasi
KOMPARASI ALAT PENILAIAN SERTIFIKASI BANGUNAN HIJAU GREENSHIP DAN LEED (STUDI KASUS GEDUNG KULIAH B FAKULTAS EKONOMI DAN BISNIS, UNIVERSITAS LAMPUNG)
No full textIsu pemanasan global dan tingginya konsumsi energi pada sektor konstruksi mendorong pentingnya penerapan konsep green building, khususnya pada bangunan pendidikan. Gedung Kuliah B Fakultas Ekonomi dan Bisnis Universitas Lampung yang baru dibangun menjadi objek yang relevan untuk dianalisis keberlanjutannya berdasarkan alat penilaian sertifikasi bangunan hijau. Analisis ini diharapkan dapat menjadi acuan dalam perancangan kampus yang lebih ramah lingkungan dan berkelanjutan.Penelitian ini bertujuan untuk menganalisis perbedaan alat penilaian sertifikasi bangunan hijau antara GREENSHIP untuk Gedung Terbangun Versi 1.1 (Existing Building/EB) dari Indonesia dan LEED for Building Design and Construction (LEED BD+C) dari Amerika Serikat, serta mengevaluasi penerapannya pada Gedung Kuliah B. Pendekatan yang digunakan adalah kualitatif komparatif dengan desain studi kasus kontrol. Teknik pengumpulan data dilakukan melalui observasi lapangan, wawancara dengan pengelola gedung, dan studi literatur terhadap dokumen serta standar terkait. Analisis data dilakukan melalui tahapan reduksi data, penyajian data, dan penarikan kesimpulan, yang kemudian divalidasi menggunakan triangulasi sumber dan metode. Fokus utama penelitian ini adalah membandingkan aspek teknis dalam kedua alat penilaian, meliputi efisiensi energi, konservasi air, kualitas udara dalam ruangan, penggunaan material, serta manajemen lingkungan.Hasil penelitian menunjukkan bahwa Gedung B telah memenuhi beberapa aspek dasar keberlanjutan seperti pencahayaan alami, area hijau, dan pengelolaan sampah. Namun, terdapat kekurangan pada konservasi air, energi terbarukan, dan pengendalian iklim mikro. GREENSHIP lebih menitikberatkan pada efisiensi lokal dan manajemen tapak, sedangkan LEED menekankan inovasi dan isu lingkungan global
UJI PERILAKU SAMBUNGAN CROSS BAMBU REPRESENTATIF TERHADAP GAYA TEKAN VERTIKAL PADA BANGUNAN BERTINGKAT
No full textMeningkatnya permintaan kayu menyebabkan menurunnya kualitas material yang tersedia karena banyaknya penggunaan kayu muda. Kondisi ini mendorong pencarian material alternatif yang lebih berkelanjutan dan mudah diperoleh, salah satunya adalah bambu. Namun, penggunaan bambu alami memiliki keterbatasan kekuatan dan konsistensi dimensi, sehingga muncul inovasi berupa bambu olahan seperti Strand Woven Bamboo (SWB). SWB memiliki sifat mekanis menyerupai kayu keras, tetapi proses pengujiannya memerlukan fasilitas khusus. Untuk itu, penelitian ini menggunakan kayu balsa sebagai material representatif karena memiliki densitas dan perilaku serat yang mendekati SWB dalam konteks uji tekan kecil berskala model. Tujuan penelitian ini adalah untuk mengetahui perilaku sambungan cross pada material representatif bambu terhadap gaya tekan vertikal. Pengujian dilakukan melalui tiga tahap menggunakan model strip dan solid-takik dengan alat tekan manual dan dongkrak untuk menganalisis deformasi sambungan. Hasil penelitian menunjukkan bahwa sambungan solid-takik mengalami deformasi signifikan saat menerima beban vertikal, di mana pemisahan pelat dan kayu terjadi secara bertahap hingga mencapai batas kekuatan sambungan. Temuan ini menjadi dasar bagi pengembangan desain sambungan bambu olahan yang lebih optimal untuk meningkatkan daya dukung dan mengurangi deformasi struktur bangunan bertingkat