Pengaruh Faktor-faktor Dalam Model of Utilization Terhadap Penggunaan Personal Computer (Studi Pada Mahaiswa Angkatan 2012/2013 Fakultas Ilmu Administrasi Jurusan Bisnis Universitas Brawijaya Malang)

Aims to reaffirm The Theory of Reasoned Action of Fishbein and Asjen (1975, is a theory that relates to the attitudes and behavior of individuals in carrying out reasoned activities and actions which are grounded in the context of the use of information technology, later developed by Thompson,et al (1991) on the early test models use of Personal Computer (Model of Utilization) by using a series ofbehavioraltheoryandattitude of Triandis's (1980).Thompson, et al (1991) observed the influences ofsocial norms, affectivebehavior, perceivedcomplexityin usingPC, the task suitability, the long-term consequences ofthe use ofPC's and the conditionsthat facilitatetheuse ofpersonalcomputer. Found there's a positive simultaneous relation between them.One of most popular universities of East Java Province is University of Brawijaya, the Faculty of Administrative Science which has a high grade require skills both in computing and information system properly, by concerning the whole aspects including technical aspects and psychological conditions. This research aims to reexamine the model proposed by Thompson, et al (1991) to measure how close the interaction of FIA UB's student and the computer needed

Electro-Discharge Machining of Zr67Cu11Ni10Ti9Be3: An Investigation on Hydroxyapatite Deposition and Surface Roughness

This study attempts to simultaneously machine and synthesize a biomimetic nanoporous hydroxyapatite coating on the Zr67Cu11Ni10Ti9Be3 bulk metallic glass (BMG) surface. The aim is to investigate and optimize the hydroxyapatite deposition rate and the surface roughness during the electro-discharge coating of Zr67Cu11Ni10Ti9Be3 BMG. Scanning Electron Microscopy (SEM), X-ray powder Diffraction (XRD) and Energy-dispersive X-ray Spectroscopy (EDS) were employed to characterize and analyze the results. Response Surface Methodology using D-optimum custom design approach was utilized to generate the models and optimize the input parameters. A globule nanostructured and nanoporous coating of about 25.2 µm thick, containing mainly Ca, O, and K were ascertained. Further XRD analysis confirmed the deposition of biocompatible oxides (HA, CaZrO3, and ZrO2) and hard ZrC coating on the Zr67Cu11Ni10Ti9Be3 BMG surface. A significant improvement in cell viability was observed in the HA electro-discharge coated BMG specimens. The numerical models for the Hydroxyapatite Deposition Rate (HDR) and Surface Roughness (SR) were developed and experimentally validated using the optimized parameters setting suggested by the software. The achieved average predicted error of 4.94 and 5.09% for the HDR and SR respectively confirmed the excellent reproducibility of the developed models

Tingkat penerapan teknologi produksi kakao di Desa Bakka Kecamatan Sabbang Kabupaten Luwu Utara

This study aims to determine the level of motivation of farmers in applying cocoa production technology and the level of application of cocoa production technology in Bakka Village, Sabbang District, North Luwu Regency. Determination of the location was done intentionally (purposive sampling) and the time of the study was carried out for two months. The sample in this study were 46 farmers. The types of data collected are primary data and secondary data, while the data collection methods are through observation, interviews, and documentation. The data analysis method used is descriptive analysis using a Likert scale. Based on the results of the study, it shows that the level of motivation of farmers in applying cocoa production technology is categorized as very high with an average score of 3.42, while the level of application of cocoa production technology by farmers is categorized as high with an average score of 2.79 but the application of cocoa production technology must be more intensive.Penelitian ini bertujuan untuk mengetahui tingkat motivasi petani dalam menerapkan teknologi produksi kakao dan tingkat penerapan teknologi produksi kakao di Desa Bakka, Kecamatan Sabbang, Kabupaten Luwu Utara. Penentuan lokasi dilakukan secara sengaja (purposive sampling) dan waktu penelitian dilakukan selama dua bulan. Sampel dalam penelitian ini sebanyak 46 orang petani. Jenis data yang dikumpulkan adalah data primer dan data sekunder, sedangkan metode pengumpulan data adalah melalui observasi, wawancara, dan dokumentasi. Metode analisis data yang digunakan adalah analisis deskriptif dengan menggunakan skala Likert. Berdasarkan hasil penelitian menunjukkan bahwa tingkat motivasi petani dalam menerapkan teknologi produksi kakao dikategorikan sangat tinggi dengan skor rata-rata 3,42, sedangkan tingkat penerapan teknologi produksi kakao yang dilakukan petani dikategorikan tinggi dengan skor rata-rata 2,79 tetapi penerapan teknologi produksi kakao harus lebih intensif

Dampak Kenaikan Harga Minyak Bumi Terhadap Ketersediaan Minyak Goreng Sawit Domestik

This paper attempts to examine the impact of rising fossil fuel prices on the increasing impact on the demand of alternative fuels (biofuels), and its impact on food availability in Indonesia. An econometric model using simultaneous equations is employed. An increase in world crude oil price for 0,192 percent caused the price of real Indonesian palm oil export raised by 10,64 percent. Consequently, a larger biodiesel production is needed to meet their crease of world's consumer demand for biodiesel. Also, with the increase in real export price of Indonesian palm oil, it will encourage palm oil producers to push their export volume. Indonesian palm oil exporter expected to increase by 6,37 percent to finally push the domestic CPO price increase for 1,85 percent. Rising domestic oil prices are causing oil demand in the palm oil industry to decline by 0,49 percent and in the end resulting in the decline of palm oil production by 1,56 percent

Fabrication of gas diffusion layer from carbon ramie fiber by hot press method

Polymer exchange membrane fuel cell (PEMFC) is an electrical energy-generating device that is renewable and environmentally friendly. However, the price of components in PEMFC is still relatively expensive and more studies are needed on making cheaper components in terms of methods and raw materials. In this research, the fabrication of gas diffusion layer (GDL) which is a component of PEMFC made from ramie fiber was investigated. The processes of preparing GDL in this research were divided into two parts: the process of making carbon from ramie fiber through pyrolysis process and fabrication of composite from carbon ramie fiber and urea formaldehyde resin (UFR) by hot press method. The carbon results from the process of pyrolysis of degummed ramie fiber with variations in pyrolysis temperature of 500 °C, 900 °C, 1100 °C and 1300 °C yield electrical conductivity values of 8.7 × 10−7 S/cm, 0.84 S/cm, 3.72 S/cm and 4.6 S/cm, respectively. The electrical conductivity of carbon ramie fiber was increased by degumming and increasing pyrolysis temperature. The 1300 °C carbon composite with a hydrophobic coating 10 wt.% FEP has an electrical conductivity of 0.25 S/cm and a water droplet angle of 133° (hydrophobic). Composites of carbon ramie fiber have potential as GDL in PEMFC

Fabrication of gas diffusion layer from carbon ramie fiber by hot press method

Polymer exchange membrane fuel cell (PEMFC) is an electrical energy-generating device that is renewable and environmentally friendly. However, the price of components in PEMFC is still relatively expensive and more studies are needed on making cheaper components in terms of methods and raw materials. In this research, the fabrication of gas diffusion layer (GDL) which is a component of PEMFC made from ramie fiber was investigated. The processes of preparing GDL in this research were divided into two parts: the process of making carbon from ramie fiber through pyrolysis process and fabrication of composite from carbon ramie fiber and urea formaldehyde resin (UFR) by hot press method. The carbon results from the process of pyrolysis of degummed ramie fiber with variations in pyrolysis temperature of 500 °C, 900 °C, 1100 °C and 1300 °C yield electrical conductivity values of 8.7 × 10−7 S/cm, 0.84 S/cm, 3.72 S/cm and 4.6 S/cm, respectively. The electrical conductivity of carbon ramie fiber was increased by degumming and increasing pyrolysis temperature. The 1300 °C carbon composite with a hydrophobic coating 10 wt.% FEP has an electrical conductivity of 0.25 S/cm and a water droplet angle of 133° (hydrophobic). Composites of carbon ramie fiber have potential as GDL in PEMFC

Powder mixed-EDM for potential biomedical applications: A critical review

Powder mixed-electro discharge machining (PM-EDM) is a new emerging trend in research on electro-thermal process that can simultaneously shape and deposit a coating on the surface of the workpiece. PM-EDM is a hybridized form of EDM in which metallic powders are amalgamated in dielectric liquid to enhance both the machined surface condition and machining performance. Migration of materials on the cutting surface occurs by melting and chemical reactions during the operation from both the electrodes and metallic powders. 316L stainless steel, Ti-based alloys, Co-Mo-Cr-based alloys, magnesium and magnesium-based alloys are commonly utilized in manufacturing biomedical devices. These biomaterials, however, release toxic particles due to corrosion, wear, tear, and tiredness of the joint replacements through repeated loads and relative movements. Surfaces of bio-implants made from these biomaterials are therefore protected using bioactive and biocompatible coating. Several methods of deposition are used for coating purposes which have both advantage and drawback. This study proposes that the PM-EDM coating enhances the biomaterials’ mechanical characteristics, surface morphology, and topography. Through reflecting critical and analytical concerns, this review focuses extensively on the current progress of the PM-EDM process. Moreover, following various research initiatives, this paper outlines the critical challenges and future research scopes

Synthesis of alumina ceramic encapsulation for self-healing materials on thermal barrier coating

Durability of Thermal Barrier Coating or TBC can be optimized by inducing Self-Healing capabilities with intermetallic materials MoSi2. Nevertheless, high temperature operation causes the self-healing materials to become oxidized and lose its healing capabilities. Therefore, a method to introduce ceramic encapsulation for MoSi2 is needed to protect it from early oxidation. The encapsulation process is synthesized through a simple precipitation method with colloidal aluminum hydroxide as precursor and variations on calcination process. Semi-quantitative analysis on the synthesized sample is done by using X-ray diffraction (XRD) method. Meanwhile, qualitative analysis on the morphology of the encapsulation was carried out by using Scanning Electron Microscope (SEM) and Field Emission Scanning Electron Microscope (FESEM) equipped with dual Focus Ion Beam (FIB). The result of the experiment shows that calcination process significantly affects the final characteristic of encapsulation. The optimum encapsulation process was synthesized by colloidal aluminum hydroxide as a precursor, with a double step calcination process in low pressure until 900 °C

Synthesis of alumina ceramic encapsulation for self-healing materials on thermal barrier coating

Durability of Thermal Barrier Coating or TBC can be optimized by inducing Self-Healing capabilities with intermetallic materials MoSi2. Nevertheless, high temperature operation causes the self-healing materials to become oxidized and lose its healing capabilities. Therefore, a method to introduce ceramic encapsulation for MoSi2 is needed to protect it from early oxidation. The encapsulation process is synthesized through a simple precipitation method with colloidal aluminum hydroxide as precursor and variations on calcination process. Semi-quantitative analysis on the synthesized sample is done by using X-ray diffraction (XRD) method. Meanwhile, qualitative analysis on the morphology of the encapsulation was carried out by using Scanning Electron Microscope (SEM) and Field Emission Scanning Electron Microscope (FESEM) equipped with dual Focus Ion Beam (FIB). The result of the experiment shows that calcination process significantly affects the final characteristic of encapsulation. The optimum encapsulation process was synthesized by colloidal aluminum hydroxide as a precursor, with a double step calcination process in low pressure until 900 °C