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Hasil Pencarian

Ditemukan 5063 dokumen yang sesuai dengan query
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Ilham Bakri
[Place of publication not identified]: [Publisher not identified], 2017
AJ-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Ilham Bakri
"The aim of this study was to evaluate the physiological responses of the driver when he or she enters the vehicle cabin for the first time after the vehicle was in a parking lot. Eight healthy male students underwent tests in vehicle cabins that had been parked for two hours without any shade. Immediately after they entered the cabin, they ran one of the test conditions: (1) all windows in the cabin were fully lowered and the air conditioning (AC) system was off (CON); (2) all windows were closed and the AC was set at the first speed level (AC 1); or (3) all windows were closed and the AC was set at the second speed level (AC 2). The attempt to decrease the air temperature in the cabin by opening all the windows did not provide a significant impact on the participants’ physiological responses. Decreasing the air temperature by turning the vehicle air conditioning on lowered mean skin temperature and heart rate, but not core body temperature. However, using the first or second speed of the AC did not make any significant difference in the physiological responses of the volunteers."
Depok: Faculty of Engineering, Universitas Indonesia, 2017
UI-IJTECH 8:2 (2017)
Artikel Jurnal  Universitas Indonesia Library
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Phongphan Tankasem
"The aim of this study
was to examine and compare psychological factors influencing car drivers? and
motorcycle riders? speeding intentions (IN), using the Theory of Planned
Behaviour (TPB). The psychological factors modules included Attitude (AT),
Subjective Norm (SN) and Perceived Behavioural Control (PBC). These were
employed to explain speeding intentions in urban road environments. A sample of
188 car drivers and 174 motorcycle riders were collected from the two
universities within Khon Kaen, Thailand. The Structural Equation Model (SEM)
was used to examine and explain speeding intentions. The results indicated that
the TPB could explain 33% and 41% of the variance of intentions by car drivers
and motorcycle riders, respectively. The most significant psychological factor
for car drivers was determined by attitude (AT), while the speeding intention
of motorcycle riders was attributed to perceived behavioural control (PBC). The
authorities in Khon Kaen Province should determine safety policies that can
improve these psychological factors, which could have various effects or
outcomes on changing car drivers? and motorcycle riders? speeding intentions.
The outcome of this study could help to understand car drivers? and motorcycle
riders? speeding intentions in urban road environments and it could be useful
for development of safety measures."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Nji Raden Poespawati
"An active Radio-Frequency Identification (RFID) tag is a low-power device, which is often used as a tracking device, where operation of this tag will be in remote areas from an electrical power source. Therefore, this device requires an independent power source. To meet these needs, solar power may be used, which can be accessed anywhere there is sunlight. Supercapacitors (SC) are used as an energy source to support a solar power system. The advantage of supercapacitors, as an energy storage device, is their long life cycle that means more charging and discharging processes compared to a conventional battery. The design and fabrication of a solar power system for an active RFID tag with supercapacitors as the energy storage will be covered in this paper."
[place of publication not identified]: [Publisher not identified], 2016
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Artikel Jurnal  Universitas Indonesia Library
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Faisal
"ABSTRAK
Permasalahan konsumsi energi adalah satu masalah yang menjadi perhatian serius pemerintahan Indonesia. Pemerintah Indonesia serius memperhatikan tingkat konsumsi energi terutama konsumsi bahan bakar minyak (bbm), dikarenakan cadangan minyak yang diangkat dari seluruh kilang minyak di Indonesia (lifting bbm) masih kurang dibandingkan tingkat konsumsi yang dilakukan oleh rakyat. Pemerintah dalam hal ini berusaha mengembangkan alternative energi yang ada. Penelitian ini mencoba merekayasa bbm solar dengan menambah dengan zat luar. Zat luar yang dipakai adalah Virgin Coconut Oil (VCO) dan minyak goreng bekas (minyak jelantah). Tujuannya untuk melihat bagaimana hasil nilai kalor (heat value) dari bbm solar (High Speed Diesel) yang telah direkayasa dengan menambah dengan zat luar (Menambah secara bergantian dan terpisah antara VCO dan Minyak Jelantah). Penelitian dilakukan dengan menguji nilai panas (HV) dari bahan bakar solar, bahan bakar campuran solar dan minyak jelantah, serta bahan bakar campuran solar dan VCO. Besar campuran pada penelitian ini dibuat 1:2 atau dengan kandungan campuran zat luar sebesar 33,3 % didalam bahan bakar campuran solar dan zat luar. Hasil pengujian dan pengamatan pada penelitian ini sebagai berikut. Nilai kalor (HV) bahan bakar solar 79726 J/g, bahan bakar campuran solar dan minyak jelantah 73034 J/g, serta bahan bakar campuran solar dan VCO 61103 J/g. Penyimpangan (eror) nilai kalor bahan bakar campuran solar dan minyak jelantah terhadap nilai kalor bahan bakar solar sebesar 8,4 %, sedangkan penyimpangan (eror) nilai kalor bahan bakar campuran solar dan VCO terhadap nilai kalor bahan bakar solar sebesar 23,4 %. Analisa secara teoritis di lihat dari grafik menunjukkan bahwa bahan bakar campuran solar dan minyak jelantah cenderung proses pembakarannya lebih baik dibandingkan bahan bakar campuran solar dan VCO."
Medan: Politeknik Negeri Medan, 2019
338 PLMD 22:1 (2019)
Artikel Jurnal  Universitas Indonesia Library
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"Memiliki rencana untuk teknologi informasi (TI) adalah base line untuk tata kelola TI yang optimal. Tapi, membuat rencana hanyalah satu masalah, melaksanakannya akan menciptakan masalah baru yang lebih menantang. Dalam penelitian ini, kami menyelidiki korelasi antara rencana TI suatu organisasi dengan tingkat maturity tata kelola TI-nya. Kami menunjukkan bahwa, di satu sisi, untuk melaksanakan rencana TI memerlukan tingkat kematangan tata kelola TI tertentu, di sisi lain, pengalaman dalam menjalankan rencana TI mendorong organisasi dalam meningkatkan tata kelola TI. Kami membandingkan situasi di dua lembaga pemerintah dan menemukan indikasi bahwa organisasi dengan rencana TI yang ambisius memiliki tata kelola TI lebih matang dari organisasi yang rencana TI-nya relatif sederhana. Hasil penelitian menunjukkan bahwa perencanaan TI yang efektif harus mencakup rencana untuk pengembangan mekanisme tata kelola TI yang relevan dengan tujuan yang ingin dicapai, dan jadwal pelaksanaan rencana atau roadmap TI, harus mempertimbangkan pertumbuhan tingkat mekanisme tata kelola TI.

Abstract
Having an information technology (IT) plan is a minimum baseline for optimal IT governance. But, creating a plan is only one problem, executing it poses even more challenging problems. In this research, we investigate the correlation between an organization?s IT plan and the organization?s IT governance maturity level. We show that, on one hand, executing an IT plan requires a certain IT governance maturity level, on the other hand, the experience of executing an IT plan drives the organization IT governance maturity level. We compare the situations in two government institutions and found indications that the organization with an ambitious IT plan has more mature IT governance than the other whose IT plan is relatively modest. The results suggest that an effective IT plan should include plans for the development of IT governance mechanisms relevant to the goals that the plan is intended to achieve, and the plan?s implementation schedule, also known as the IT roadmap, should take into consideration the growth of the IT governance mechanisms? maturity levels."
[Fakultas Ilmu Komputer Universitas Indonesia, Fakultas Ilmu Komputer Universitas Indonesia], 2009
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Artikel Jurnal  Universitas Indonesia Library
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"Solar drying provides an alternative to the use of fossil fuel. Solar drying system is one of the most promising applications of crop drying. However, there are problems associated with the intermittent natural of solar radiation and the low intensities of solar radiation. The problems can be remedied by the use of heat storage, auxiliary energy source, control system, larger surface collector and hybrid system. However, this will result in a high capital investment. Economic indicators such as cost of
maintenance, payback period, internal rate of return can be used to calculate the economic of it application.
This paper presents the experience in Malaysia on crop drying. We also present the performance of four solar assisted drying systems for crop drying using different collector types, (a) V-groove solar collector with cabinet dryer, (b) double-pass solar collector with porous media in the lower channel and a flat bed drying chamber, (c) Solar dehumidification system and (d) Photovoltaic-thermal solar drying system."
600 JITE 1:12 (2011)
Artikel Jurnal  Universitas Indonesia Library
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Yunita Kusuma Wardani
"Penelitian ini membahas tentang perkembangan otomotif di Indonesia dan alih teknologi yang dilakukan oleh Mitsubishi. Sejak masa pemerintahan Soekarno sampai dengan Soeharto, Indonesia memiliki satu obsesi, yakni memproduksi mobil secara lokal. Indonesia pada saat itu tidak memiliki teknologi yang dapat menciptakan mobil, salah satu cara untuk medapatkan teknologi tersebut adalah dengan melakukan alih teknologi. Sampai pada tahun 1970, ketika Mitsubishi masuk ke Indonesia, dan mendirikan pabrik pertama mereka di sini. Dari hasil penelitian ini menunjukkan bahwa selama Mitsubishi ada di Indonesia, secara tidak langsung telah berperan penting dalam meningkatkan teknologi di Indonesia, walaupun belum seperti yang kita harapkan.

This study discusses about the development of automotive and technology transfer done by Mitsubishi in Indonesia. Since Soekarno until Soeharto's reign, Indonesia had one obsession which is to produce cars locally. But at that time, Indonesia did not have the technology to build a car. Thus, the way to get the technology was by doing the technology transfer until 1970 when Mitsubishi first entered Indonesia and established their first factory here. The results of this study show that during that time, Mitsubishi had an important role to improve technology in Indonesia. Even though it wasn't like what we expected."
Depok: Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2014
S55428
UI - Skripsi Membership  Universitas Indonesia Library
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Angga Julian Putra Utomo
"Terdapat permasalahan berkaitan dengan ketersediaan air tawar di seluruh dunia. Terlepas dari fakta bahwa 70% Bumi terdiri dari air, hanya 2,53% darinya adalah air tawar, dan hanya 0,36% darinya dapat diakses. Situasi semakin memburuk karena pertumbuhan populasi dan kebutuhan air yang melampaui kapasitas eksploitasi. Fokus penelitian ini adalah solusi untuk desalinasi air laut. Teknologi ini menghasilkan air tawar dengan efektif melalui proses penguapan dan kondensasi. Pemanfaatan teknologi ini berfokus pada daerah terpencil yang memiliki keterbatasan dalam pasokan energi listrik. Salah satu inovasi baru adalah penggabungan dengan Direct Spray Evaporator untuk meningkatkan temperatur air laut dan efisiensi desalinasi.
Penelitian dan perancangan ini dilakukan dengan tujuan untuk membuat prototipe dan meningkatkan performa dari sistem solar still untuk menghasilkan air tawar. Penelitian ini dilakukan dengan memvariasikan beberapa faktor atau variabel, seperti feed water temperatur pada 50oC, 55oC, 60oC, 65oC, 70oC, dan 80oC; feed water flowrate pada 0,4 LPM, 0,5 LPM, dan 0,6 LPM; vacuum pressure pada -0,4 bar, -0,5 bar, dan -0,6 bar; dan cooling water temperatur pada 25oC, 27oC, dan 29oC. Beberapa variasi tersebut dibuat untuk mengetahui pengaruh dari masing-masing variabel terhadap destilate productivity dan menentukan kondisi optimal dari pengoprasian solar still desalination. Performa kinerja solar still paling efektif dicapai pada temperatur air umpan 80°C, laju aliran 0,6 LPM, tekanan vakum -0,6 bar, temperatur air pendingin 29°C dengan laju aliran 1,4 LPM, menghasilkan 0,22 liter air destilat, recovery rate 0,61%, specific energy consumption 57092,39 kJ/L, dan efisiensi termal 66,63%, menunjukkan potensi tinggi sistem ini.

There is a problem related to the availability of fresh water throughout the world. Despite the fact that 70% of the Earth consists of water, only 2.53% of it is fresh water, and only 0.36% of it is accessible. The situation is getting worse due to population growth and water needs that exceed the exploitation capacity. The focus of this research is a solution for seawater desalination. This technology produces fresh water effectively through the process of evaporation and condensation. The use of this technology focuses on remote areas that have limited electricity supply. One of the new innovations is the combination with Direct Spray Evaporator to increase seawater temperatur and desalination efficiency.
This research and design were carried out with the aim of making a prototype and improving the performance of the solar still system to produce fresh water. This research was carried out by varying several factors or variables, such as feed water temperatur at 50oC, 55oC, 60oC, 65oC, 70oC, and 80oC; feed water flowrate at 0.4 LPM, 0.5 LPM, and 0.6 LPM; vacuum pressure at -0.4 bar, -0.5 bar, and -0.6 bar; and cooling water temperatur at 25oC, 27oC, and 29oC. Several variations were made to determine the effect of each variable on distillate productivity and determine the optimal conditions for operating solar still desalination. The most effective solar still performance was achieved at a feed water temperatur of 80°C, a flow rate of 0.6 LPM, a vacuum pressure of -0.6 bar, a cooling water temperatur of 29°C with a flow rate of 1.4 LPM, producing 0.22 liters of distillate water, a recovery rate of 0.61%, a specific energy consumption of 57092.39 kJ/L, and a thermal efficiency of 66.63%, indicating the high potential of this system.
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Depok: Fakultas Teknik Universitas Indonesia, 2024
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UI - Skripsi Membership  Universitas Indonesia Library
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