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URANIA 19:1 (2013) (1)
Artikel Jurnal  Universitas Indonesia Library
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Salma Azhari Khairunnisa
"Banyak kesamaan dalam desain dan teknik dapat dilihat pada hubungan antara arsitektur dan fashion. Baik arsitektur dan mode berbagi prinsip yang sama dalam struktur, bentuk, dan bahan untuk melindungi penggunanya. Pengenalan material dan teknologi baru meningkatkan interaksi antara mode dan arsitektur. Garis batasan yang mulai kabur antara mode dan arsitektur telah mendorong terciptanya praktik hibrid yang menggabungkan karakteristik kedua disiplin ilmu tersebut, seperti munculnya produk arsitektur yang dapat dikenakan. Karena produk arsitektur yang dapat dikenakan ini berada diantara industri arsitektur dan industri fashion, maka penulis tertarik untuk memaparkan proses produksi produk hybrid tersebut sebagai tujuan dari skripsi ini.
Analisis teoretis tentang konvergensi industri arsitektur dan mode disebutkan dalam studi literatur. Investigasi penulis tentang bagaimana siswa di kelas digital fabrikasi menjalani proses berpikir dan merancang akan disebutkan dalam studi kasus. Penulis menyelidiki bagaimana keahlian dan pengetahuan dalam material dan manufaktur memengaruhi pendekatan desain merek

Many commonalities in design and engineering may be seen in the link between architecture and fashion. Both architecture and fashion share the same principles in structure, form, and materials to protect and shelter their users. The introduction of new materials and technology is increasing the interplay between fashion and architecture. The blurring barriers between fashion and architecture have driven the creation of hybrid practices that combine characteristics of both disciplines, such as the growth of wearable architecture. Since this wearable architecture stands in a class between the architectural industry and the fashion industry, the author is interested in exposing the production process of this hybrid product as the purpose of this thesis.
Theoretical analysis of the convergence of the architectural and fashion industries are mentioned in literature studies. Authors investigation on how students in a class go through the process of thinking and designing are mentioned in case study. The author investigates at how material and manufacturing expertise affects their design approach.
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Depok: Fakultas Teknik Universitas Indonesia, 2023
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UI - Skripsi Membership  Universitas Indonesia Library
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Difa Putri Utami
"ABSTRAK
Latar Belakang: Material bone graft sintetis, salah satunya adalah kalsium karbonat/kalsit (CaCO3), yang dapat dibuat dengan menggunakan transformasi fasa melalui reaksi disolusi presipitasi. Metode ini sama dengan pembuatan CO3Ap. Penelitian yang dilakukan sebelumnya untuk membuat oleh Ishikawa, K., dkk (2017) dapat menghasillkan blok CaCO3 dalam waktu 14 hari melalui perendaman dalam Na2CO3 pada suhu 80ºC. Sementara penelitian Nomura, S., Dkk(2016) untuk menghasilkan CO3Ap dengan menggunakan suhu 100ºC, CaSO4 sudah dapat bertransformasi fasa dalam 1 hari menjadi CO3Ap. Pada proses transformasi fasa, bentuk prekursor dapat menentukan kecepatan reaksi disolusi presipitasi. Dimana semakin luas permukaan prekursor semakin cepat reaksi presipitasi terbentuk. Penggunaan prekursor CaSO4 sudah pernah digunakan sebelumnya, namun dalam bentuk blok. Untuk menghasilkan CaSO4 dapat digunakan metode seperti pada penelitian Arsista, D., dkk(2017), yaitu melalui pembakaran blok CaSO4.2H2O pada suhu 700ºC. Blok yang dihasilkan kemudian dijadikan granul, dan direndam dalam larutan Na2CO3. Dengan bentuk perkursor yang lebih kecil dan suhu yang digunakan 100ºC, transformasi fasa CaSO4 menjadi fasa CaCO3 yang terjadi dapat dipengaruhi oleh lama perendaman hingga 14 hari melalui reaksi disolusi presipitasi. Tujuan : Fabrikasi dan karakterisasi granul CaCO3 dengan merendam granul CaSO4 ke dalam larutan Na2CO3 sampai dengan 14 hari. Metode: Fabrikasi granul CaSO4 melalui pembakaran blok CaSO4.2H2O (T = 700ºC) menghasilkan blok CaSO4, kemudian dihancurkan menjadi granul berukuran 300-500µm. Fabrikasi Granul CaCO3 melalui perendaman CaSO4 direndam dalam larutan Na2CO3 0,5mol/L selama 1, 2, 3, 7 dan 14 hari (T = 100ºC). Karakterisasi prekursor CaSO4 dan hasil CaCO3 dengan analisis X-Ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) dan Scanning Electron Microscope (SEM) dan mengetahui jumlah unsur yang terdapat pada masing-masing sampel dengan menggunakan EDS. Hasil: Prekursor CaSO4 yang dihasilkan teridentifikasi memiliki fasa CaSO4 dan CaSO4.2H2O. Granul CaCO3 yang dihasilkan tidak murni, dari hasil XRD dan FTIR menunjukkan adanya impuritas CaSO4. Dimana intensitas fasa CaSO4 yang menjadi impuritas pada CaCO3 yang dihasilkan relatif sama dari 1 hingga 14 hari. Kesimpulan: Granul CaCO3 yang terbentuk tidak dipengaruhi oleh lama perendaman granul CaSO4 di dalam larutan Na2CO3 selama 1 hingga 14 hari. Prekursor CaSO4 yang dihasilkan memiliki impuritas CaSO4.2H2O, karena CaSO4 sensitif terhadap kelembaban. Reaksi disolusi presipitasi untuk menghasilkan CaCO3 dengan menggunakan suhu 100ºC belum dapat menghasilkan CaCO3 murni.

ABSTRACT
Background: Calcium carbonate/calcite (CaCO3) is one of synthethic bone graft materials, which can be made using phase transformation through precipitation dissolution reactions. This method is similar to the method to make CO3Ap. Previous research by Ishikawa, K., et al. (2017) was able to produce CaCO3 blocks within 14 days through immersion in Na2CO3 at 80ºC. While the research of Nomura, S., et al (2016) was able to produce CO3Ap at 100ºC, CaSO4 has been able to phase transform in 1 day to CO3Ap. In the process of transforming the precursor phase, the form of precursor can determine how long precipitation dissolution reaction will be done, by the precursor surface area. The use of CaSO4 precursors has been done before, but in the form of blocks. Methods to produce CaSO4 can be used as in the Arsista, D., et al (2017), which is through burning CaSO4.2H2O blocks at 700ºC. The CaSO4 block is then crushed into granules, and soaked in a Na2CO3 solution. With smaller form of precursor and higher temperature at 100ºC, phase transformations from CaSO4 to CaCO3 that occur THROcan be affected by the immersion time up to 14 days in the can affect the CaSO4 granule precursor into a new compound, CaCO3. Objective: Fabrication and characterization of granules CaCO3 by immersing CaSO4 granules into Na2CO3 solution for up to 14 days. Methods: Fabrication of CaSO4 granules through burning CaSO4.2H2O block (T = 700ºC) to produced CaSO4 block, then crushed into 300-500µm granules. Fabrication of CaCO3 granules through immersion of CaSO4 in 0.5mol/L Na2CO3 solution for 1, 2, 3, 7 and 14 days (T = 100ºC). Characterization of CaSO4 precursors and CaCO3 results by X-Ray Diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR) and Scanning Electron Microscope (SEM) and find out the number of elements in each sample using EDS. Results: The CaSO4 precursors were identified to have CaSO4 and CaSO4.2H2O phases. The CaCO3 granule have impurities, from the results of XRD and FTIR indicating the presence of CaSO4 as impurity. Where the intensity of CaSO4 phase which becomes impurity in the resulting CaCO3 is relatively the same from 1 to 14 days. Conclusion: The CaCO3 granule formed is not influenced by the immersion time of CaSO4 granules in Na2CO3 solution for 1 to 14 days. The CaSO4 precursor has impurity of CaSO4.2H2O, because CaSO4 is sensitive to moisture. The precipitation dissolution reaction to produce CaCO3 at 100ºC has not been able to produce pure CaCO3."
2019
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UI - Tesis Membership  Universitas Indonesia Library
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Indar Kustiningsih
"Titania nanotubes (TiO2 NT) and Titania nanowires (TiO2 NW) were fabricated using TiO2 Degussa P25 (TiO2 P25) nanoparticle as precursors via a sonication-hydrothermal combination approach. The prepared catalysts were characterized by means of an X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), ultraviolet-visible diffuse reflectance spectroscopy (DRS) and the Brunauer-Emmett-Teller technique (BET). The photocatalytic activity of prepared catalysts was evaluated for photocatalytic H2 evolution from an aqueous methanol solution. The results showed that activity of the catalyst not only depends on the morphology of its catalysts, but also on the crystalinity and surface area. Hydrogen production of TiO2 NT was about three times higher than TiO2 P25 and TiO2 NW was two times higher than TiO2P25."
Depok: Faculty of Engineering, Universitas Indonesia, 2014
UI-IJTECH 5:2 (2014)
Artikel Jurnal  Universitas Indonesia Library
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Donanta Dhaneswara
"Al2O3 reinforced aluminum A356 has been successfully fabricated using the stir casting method. The development of current technology requires a material that is light, strong, tough, and corrosion and wear resistant, in addition to various other advanced properties. A composite material was therefore developed. Composite materials can be used in a wide range of strategic sectors such as the automotive, military, aerospace, and electrical industries. This study aims to develop a composite material that consists of aluminum A356 as the matrix and micro Al2O3 as the reinforcement, with 8 wt% magnesium as the wetting agent with the addition of grain refiner TiB at 0; 0.01; 0.0347; 0.0362; 0.0622; and 0.0689 wt% using the stir casting method. The material characterization comprises tensile testing, hardness testing, wear testing, chemical composition testing (OES and XRD), and microstructure testing (OM, SEM, and EDX). The test results revealed that the addition of 0.0347 wt% TiB was capable of reducing the size and changing the shape of a long and coarse grain to become round and fine, thereby significantly increasing its tensile strength, hardness, and wear resistance, but decreasing the elongation and ductility."
Depok: Faculty of Engineering, Universitas Indonesia, 2017
UI-IJTECH 8:8 (2017)
Artikel Jurnal  Universitas Indonesia Library
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Fitri Yuli Zulkifli
"A design and fabrication of a compact ultra-wideband (UWB) bandpass filter (BPF) using single cell Composite Right-Left Handed Transmission Line (CRLH-TL) is reported in this paper. This compact filter design is achieved using a single cell CRLH-TL structure which is implemented on the FR4 dielectric substrate with permittivitty of 4.4 and dielectric thickness of 1.6mm. The dimensions of the filter structure consider the capability of the fabrication tools in Indonesia. The compact filter operates from 4 GHz to 9.5 GHz with insertion loss less than - 1.5dB."
Depok: Faculty of Engineering, Universitas Indonesia, 2012
UI-IJTECH 3:2 (2012)
Artikel Jurnal  Universitas Indonesia Library
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Wangi Pandan Sari
"MEMS (micro-electromechanical systems) merupakan perangkat terintegrasi elektro-mekanik yang teknologinya telah diterapkan untuk berbagai aplikasi, salah satunya untuk fabrikasi mikrosensor seperti akselerometer, mikrosensor penginderaaan aliran, penginderaan tekanan, dan penginderaan massa. Dalam implementasi MEMS, terdapat beberapa pendekatan dan struktur yang dapat digunakan. Penelitian ini melakukan perancangan sensor massa resonator MEMS dengan menggunakan pendekatan resonator mekanik dengan struktur free-free beam yang diaktuasi secara elektrostatik. Desain yang dirancang diharapkan dapat menghasilkan sensor massa dengan performa yang tinggi"
Yogyakarta: Pusat Penelitian dan Pengabdian Pada Masyarakat (P3M) STTA, 2021
620 JIA XIII:2 (2021)
Artikel Jurnal  Universitas Indonesia Library
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"The behavior of UO2 powder from ADU, AUC,IDR AND modified adu processes during sintering using dilatometer. Research on the bahavior of UO2 powder during sintering has been performed. Observation of the powder bahavior is conducted on four types of UO2 powder prepared from ADU,AUC,IDR and modified ADU routes. The purpose is to determine UO2 powder that has good sinterability without pre-conditioning treatment on the powder...."
Artikel Jurnal  Universitas Indonesia Library
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"Characterization of pellet mixture of oxyde uranium and oxyde zirconium that is sintering process product. Characterization of nixture pellet UO2 and ZrO2 result of sintering process has been done as a mean to knows hardness character , microstructure, grain size and pellet density...."
Artikel Jurnal  Universitas Indonesia Library
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