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Comparative Study of Hydro-Magneto-Electric Regenerative Shock Absorber (HMERSA) with Two Outputs Hydraulic Generator Installed Series And Parallels
Get PDFThrough the Regenerative Shock Absorber (RSA) mechanism, wasted energy will be utilized into electrical energy. Hydro-Magneto-Electric Regenerative Shock Absorber (HMERSA) was designed and analyzed with 2 generator outputs installed in series and parallel. The twin-tube shock absorber was modified, so that fluid flow in the chamber is only unidirectional flow. It is passed to four check valves that keep the fluid flow in one direction and towards the 2 hydro-generators installed on the system in series and parallel positions. The hydro-generator converts the linear fluid flow into a rotational motion which causes the generator to rotate and generate energy. HMERSA was tested on minibus with speed bumps types of roads. In the bump test, the harvested energy were 8.2 Volts and 5.97 Volts for HMERSA with 2 generator outputs installed in series, and 5.169 Volts and 4.33 Volts for HMERSA with 2 parallel output generators. From the result, we can conclude that HMERSA with 2 generator outputs installed in series is better than HMERSA with 2 parallel output generators
Pola Penataan Ruang Layanan Publik yang Smart, Berdasarkan Kajian Okupansi dan Attachment Pengguna (Objek Kasus : Ruang Layanan Publik di Kantor / Dinas di Pemerintah Kota Surabaya)
Get PDFRuang layanan publik kantor identik dengan pintu gerbang imej layanan. Secara umum ruang layanan publik berfungsi antara lain area informasi, area tunggu, area penerima tamu, area layanan dan area sekuriti. Bentuk dan jenis area tersebut sangat tergantung pada karakter kantor/kedinasan. Terdapat fenomena bahwa adanya layanan satu atap, yaitu terdapat 2 atau lebih jenis kantor/kedinasan dalam satu bangunan gedung. Hal ini menjadi menarik, karena masing masing memiliki karakter layanan yang berbeda, namun dalam satu ruang layanan publik. Jenis layanan yang beragam yang terjadi di satu ruang di ruang layanan publik, sering menimbulkan disorientasi sebagai dampak dari ketidak efektifan penggunaan ruang. Penelitian ini bertujuan merumuskan pola okupansi dan attachment pengunjung di ruang layanan publik kantor PDAM Surya Sembada kota Surabaya, untuk menjadi row model penataan area dan penggunaan ruang. Penelitian dilakukan dengan cara observasi perilaku melalui rekam jejak guna mencermati pola aktivitas yang terjadi. Wawancara digunakan utuk melengkapi data. Rumusan Pola okupansi dan attachment pengunjung di ruang layanan publik kantor PDAM Surabaya diharapkan menjadi row model smart performance public space untuk keberlangsungan/sustainable environment. Luaran penelitian ini berupa paper yang dipublikasikan di jurnal nasional
Pengembangan Konsep Brand Identity dan Visual System ITS yang Lebih Terintegrasi
Get PDFBrand Identity merupakan aspek yang sangat penting dalam sebuah entitas, antara lain sebagai tanda kepemilikan, jaminan kualitas, mencegah peniruan atau pembajakan. Selain sebagai ciri dan sarana identifikasi, brand identity juga dapat difungsikan sebagai alat promosi dan branding entitas tersebut. Institut Teknologi Sepuluh Nopember (ITS) sebagai sebuah entitas pendidikan tinggi teknologi di Indonesia sudah saatnya membangun konsep brand identity-nya secara lebih komprehensif, konsisten dan terintegrasi. Karena penggunaan brand identity secara konsisten dan terintegrasi sangat penting untuk mendukung brand image ITS dalam kontestasi lokal maupun global. Melalui pendekatan metode desain dan visual branding, penelitian ini bertujuan untuk mengembangkan konsep brand identity ITS secara lebih konsisten dan terintegrasi. Lingkup penelitian ini antara lain meliputi; studi eksisting terhadap penerapan system identitas visual yang ada, mengembangkan konsep desain dan pedoman penerapannya secara lebih terintegrasi pada atribut kebutuhan ITS. Hasil penelitian ini diharapkan dapat menjadi bahan pertimbangan kebijakan bagi ITS dalam penerapan visual identity system di ITS selanjutnya. Sehingga melalui penerapan brand identity yang teratur dan konsisten diharapkan dapat memberikan dampak dalam penguatan branding ITS menuju World Class University.Brand Identity is a very important aspect in an entity, among others, as a sign of ownership, quality assurance, preventing imitation or piracy. Apart from being a feature and means of identification, brand identity can also function as a promotional and branding tool for the entity [1]. Institut Teknologi Sepuluh Nopember (ITS) as a higher technology education entity in Indonesia, it is time to build a more comprehensive and consistent brand identity concept. Because the consistent use of brand identity is very important to support ITS brand image in local and global contestation.Through the design method approach and visual branding, this study aims to develop the ITS brand identity concept in a more consistent and integrated manner. The scope of this research includes; Existing studies on the application of existing visual identity systems, develop design concepts and guidelines for their implementation in a more integrated manner in formal attributes according to ITS needs. The results of the development of this design concept are expected to be material for policy considerations for ITS in the next application of the visual identity system at ITS. So that through the regular and consistent application of brand identity, it is hoped that it can have an impact in strengthening ITS branding towards World Class University
Comparative Analysis of FCAW, and GMAW Welding With Heat Input Variations on A36 Steel Against Vickers Hardness Test and Macrostructure
Get PDFIn offshore building construction, a precise welding method is needed on A36 steel, where A36 steel is one of the main materials in the fabrication process of offshore buildings. In this study a comparison of the results of the welding GMAW and FCAW with variations of the heat input on the A36 steel to the Hardness test, and the macrostructure test and the selection of the most appropriate method based on the results of the mechanical test analysis. The heat input variations used are GMAW 1.50 kJ / mm and 2.03 kJ / mm while for FCAW 1.90 kJ / mm and 2.30 kJ / mm. The results of this study are the best hardness test results are the FCAW welding method with a heat input of 2.30 kJ / mm with an average ultimate strength of 149.06 HVN, in the macro test the results show that the greater the heat input, the wider the HAZ area, this is shown by welding FCAW heat input 2.30 kj / mm which has a HAZ width area of 20 mm
CONTENTS
Get PDFContents of International Journal of Offshore and Coastal Engineering Vol 5, No 2 (2021
Pengaruh Pandemi Covid-19 Terhadap Kinerja Jalan dan Kecepatan Kendaraan Pada Ruas Jalan di Kota Surabaya
Get PDF Indonesia menjadi salah satu negara yang terdampak Covid-19. Salah satu upaya untuk mengurangi penyebaran virus Covid-19 tersebut melakukan PSBB, termasuk Surabaya Raya. Sehingga terjadinya beberapa pembatasan angkutan transportasi pribadi maupun massal. Penelitian ini dilakukan untuk mengetahui perbedaan kondisi lalu lintas sebelum pandemi, PSBB, dan new normal. Pengumpulan data dilakukan dengan melakukan survey lalu lintas. Hasil analisa kapasitas ruas Jalan Darmo dan Jalan Pemuda menunjukkan adanya penurunan nilai DJ dan kenaikan kecepatan kendaraan saat PSBB. Nilai DJ mengalami kenaikan dan kecepatan kendaraan menurun saat new normal. Nilai DJ dan kecepatan kendaraan pada Jalan Tunjungan menunjukkan hasil yang berbeda. Hal ini menunjukkan pandemi Covid-19 mempengaruhi pola hidup masyarakat, dimana saat ini telah diberlukan kebijakan work from home (WFH) untuk menekan persebaran Covid-19, sehingga menyebabkan volume kendaraan menjadi berkurang
Product Quality Improvement in the Assembly Process of the 5.56 mm Ammunitions (Variant MU5-TJ) at PT.X Using the Six Sigma Method
Get PDFQuality is one of the essential indicators for companies to exist amid strong competition. The 5.56 mm ammunition, especially variant MU5-TJ, is the primary commodity of PT. X. The process in ammunition production includes making cartridge cases, making bullets, making primers, and assembling ammunitions. The highest cost of defective products is led by defects in the preparation of the 5.56 mm ammunition, reaching 32.3%. In the process of preparing this kind of ammunition, most of the defects came from variant MU5-TJ, which accounted for 64%. This study aimed to improve the quality of the MU5-TJ ammunition preparation process by increasing its level of sigma. The method used in this study was the Six Sigma method through the Define, Measure, Analyze, Improve, and Control (DMAIC) phases. The quality identification results showed that the weighing and gauging process was the most contributing factor to the defects in the preparation of MU5-TJ ammunitions. The main defect found was the improper weight of the munitions due to the underfilling of propellant powder. The results of the chi-square test showed that the defect-causing factors with significant effects included the presence of sensor filling, varnish composition, tool material, and inspection methods. To reduce the defects, further improvements were made by installing the filling sensor on the ammunition assembly machine, changing the composition of the cartridge case mouth varnish, the use of tools made of hartmetall, and auto-control by the operator every 15 minutes. The results of the implementation of the improvements made resulted in an increase in sigma level from 3.69 to 3.79
Quality Improvement Design on Sales Website Using Fuzzy Quality Function Deployment (FQFD) Method
Get PDFPT. XYZ is a company engaged in fashion which manufactures and sells its own products to consumers. The company sells through various online media including its own website and several marketplace media. However, their consumers make more online purchases through the marketplace than the website, which makes it difficult because the company can only use purchases from the website to obtain complete customer data needed to explore customer behavior. This research will be done using the Fuzzy QFD method to improve the quality of online sales service through the website based on the identified weaknesses of the company website that causes consumers to avoid making online purchases through the website. Fuzzy QFD is a QFD method integrated with fuzzy logic which aims to reduce the vagueness or obscurity of subjective judgments to improve calculation accuracy. The results of this research are 5 technical requirement from FQFD 1st iteration and critical part from 2nd iteration which are expected to produce recommendations needed by company to improve the quality of online sales services through its website based on a more objective and accurate data
Heat Exchanger Network Optimization in A Natural Gas Dehydration Unit
Get PDFA dehydration unit using triethylene glycol absorption is a common process in natural gas processing. In its regeneration section, the regenerated lean glycol needs to be cooled before entering the glycol absorber, while the rich glycol is to be preheated before entering the regenerator. This is a good candidate for heat exchanger network (HEN) optimization. In this work, the HEN was revisited using pinch analysis (PA) and mathematical programming (MP) using superstructure. The optimized networks were evaluated using simplified total annual cost (TAC). The PA method using small Tmin (minimum temperature approach) led to the configuration of three exchangers, a heater and a cooler, with minimized utilities. At larger Tmin, the configuration became into two exchangers, two heaters, and a cooler. The minimum calculated TAC is 59,224/year. The superstructure approach resulted in two exchangers, a heater, and a cooler; with a calculated minimum TAC of $57,597/year. The two approaches have resulted in very similar minimized TAC
The Spatial Characteristics of Tidal Flood Vulnerability and Adaptation Strategy in Tambak Lorok Kampung Settlement
Get PDFThe coastal area has an important role in supporting the community development and economics. The problem occurs when the tidal flooding has almost completely engulfed human activities for instance in human settlements. Tidal flooding has a negative impact on physical, social, economic, and environmental conditions, as an example the coastal settlement in Tanjung Mas Village. Tidal flood, in addition, can cause damage on infrastructure and housing areas, also, it has an impact to the live of communities, households, and individuals simultaneously. This research aims to examine on how to determine the vulnerability of community settlements to the danger of tidal flooding and how to build the adaptation efforts among the community to deal with tidal flooding disaster in order to keep the buildings and public facilities in safety. This research uses interview and observation methods, then, by using qualitative descriptive techniques to gain result underlined in the object research. The result shows that Kampong Tambak Lorok can be divided into 3 zones at high, medium and low. This zoning concept is obtained from flood vulnerability assessment related to the high of tidal flood, inundation duration and its impact. The first zone is represented by a high tidal flood with an average threat duration of inundation ranging from 3 to 5 hours. The depth of the tidal flooding can reach around 70-80 cm from the floor in a house. The second zone is represented by a medium tidal flooding with an average threat duration of inundation ranging from 3 to 4 hours. The depth of the Tidal Flood can reach around 50-60 cm from the floor. The third zone is a low tidal flooding with an average threat of inundation ranging from 0 to 1 hour. The problem of settlements on monetary and non-monetary factors lies in the economic capacity of the community which is classified as very low, affecting the value of expenditure for settlement needs. This has an impact on the response of the community in dealing with tidal flooding. Adaptation to settlements by elevating the level of floor in the house, changing the position of electricity, elevating the height of the house, making dykes on the front of the house and suctioning the flood by pump