Yogyakarta, Indonesia
Yogyakarta, Indonesia

The Islamic University of Indonesia is a private university located in Yogyakarta, Indonesia. It was established in 27 Rajab 1364 or in 8 July 1945 as STI by political figures of the day including Dr. Muhammad Hatta, Mohammad Natsir, Mohammad Roem, Wachid Hasyim as well as Abdul Kahar Mudzakir. STI developed into a university called Universitas Islam Indonesia on 14 December 1947. Historically, UII is the first national university in Indonesia, and it is also the oldest private university in the country.The university is located in Sleman, Daerah Istimewa Yogyakarta. Wikipedia.

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Fatimah I.,Islamic University of Indonesia | Wang S.,Curtin University Australia | Wulandari D.,Islamic University of Indonesia
Applied Clay Science | Year: 2011

Synthesis of a ZnO/montmorillonite photocatalyst based on an Indonesian natural montmorillonite was conducted using a sol-gel intercalation method. The physicochemical properties of the material were determined by XRD, N2 adsorption-desorption, SEM, TEM and UV-Vis diffuse reflectance. The activity was evaluated in photocatalytic and photochemical degradation of methylene blue (MB) with and without H2O2. Characterization showed that the ZnO particles were successfully distributed in montmorillonite support and ZnO/montmorillonite had lower band gap energy. The increased adsorption of MB on ZnO/montmorillonite resulted in faster photodegradation. The kinetics of the reaction obeyed the Langmuir-Hinshelwood model. © 2011 Elsevier B.V.

Putra R.S.,Hokkaido University | Putra R.S.,Islamic University of Indonesia | Tanaka S.,Hokkaido University
Separation and Purification Technology | Year: 2011

The usefulness of the combined electrokinetic (EK) remediation with aluminum drinking water treatment residuals (Al-WTRs) as an entrapping zone (EZ) for removal of lead ion from artificially contaminated soil was demonstrated. Laboratory experiments were performed with variable conditions including (i) type of Al-WTRs materials and the application of Al-WTRs as an EZ system during the EK processing, (ii) pH and (iii) position of EZ in the soil cell. The potential of aluminum leachability from Al-WTRs as the result of EK process was also discussed. The results show that the lead ions in the contaminated soil were transferred into the EZ by EK process and immobilized by adsorption sites on polymeric aluminum residual in the Al-WTRs. These residual compounds contained lead, which were not dissolved by diluted organic acid (0.1 M acetate buffer), were retained in the EZ and accumulated there. After 72 h of the electrokinetic process, the total amount of lead in the EZ was much higher than the initial lead concentration in the contaminated soil. © 2011 Elsevier B.V.

Fatimah I.,Islamic University of Indonesia
Journal of Materials and Environmental Science | Year: 2012

Titania pillared montmorillonite from Indonesian montmorillonite by using titanium isopropoxide as precursor was successfully prepared. Physico-chemical character of material by using x-ray diffraction, gas sorption analyzer, diffuse reflectance UV-Visible, scanning electron microscope (SEM) and energy dispersive x-ray (EDAX) showed the dipersion of titania in dominantly anatase phase that is theoretically active as photocatalyst. The photoactivity was evaluated in methylene blue photodegradation and Eschericia coli inactivation. The kinetics of metylene blue photodegradation indicate the significant role of prepared material as photocatalyst as well as in E. coli inactivation. Photodegradation of methylene blue over prepared material shows the fitness to Langmuir-Hinshelwood model.

Fatimah I.S.,Islamic University of Indonesia
Bulletin of Chemical Reaction Engineering and Catalysis | Year: 2013

Preparation of silver immobilized TiO2-Hectorite and its application in phenol photooxidation and Eschericia coli bacteria desinfection has been conducted. Material was obtained by two steps of synthesis: preparation of TiO2-Hectorite and silver immobilization into TiO 2-Hectorite. Physico-chemical characterization to the prepared material compared to raw hectorite was conducted by X-ray Diffraction, gas sorption analyzer, scanning electron microscope and DRUV-Visible spectrophotometry and for photoactivity study, phenol photo-oxidation and Eschericia coli desinfection were investigated. The results indicated that the modification to hectorite material improve the physico-chemical character related to its role as photo-catalyst. Kinetic study of phenol photooxidation revealed the role of TiO2 pillarization and silver immobilization in enhancing rate of reaction as well as increased photoactivity of the materials in E. coli desinfection. © 2013 BCREC UNDIP.

Putra R.S.,Islamic University of Indonesia
IOP Conference Series: Materials Science and Engineering | Year: 2016

Agar matrix was artificially contaminated with caesium and subjected to rapid assessment of electrokinetic treatment on the basis of the 2D electrode configuration. The effect of caesium concentration on the process was investigated using different electrode configuration (i.e. rectangular, hexagonal and triangular). During treatment the in situ pH distribution, the current flow, and the potential distribution were monitored. At the end of the treatment, the caesium concentration distribution was measured. The results of these experiments showed that for caesium contamination, pH control is essential in order to create a suitable environment throughout the agar matrix to enable contaminant removal. It was found that the type of electrode configuration used to control the pH affected the rate of caesium accumulation. All of the electrode configurations tested was effective, but the highest caesium extraction was achieved when the hexagonal pattern was used to control the pH. After 72 h of treatment at 50 mA, the concentration of caesium decreased gradually from the second and first layer of agar matrix throughout the cell, suggesting that most of the caesium was concentrated on the cathode part. © Published under licence by IOP Publishing Ltd.

Rahmillah F.I.,Islamic University of Indonesia
IOP Conference Series: Materials Science and Engineering | Year: 2016

The working environment is one factor that has contribution to the worker's performance, especially for continuous and monotonous works. L9 Taguchi design experiment for inner array is used to design the experiment which was carried out in laboratory whereas L4 is for outer array. Four control variables with three levels of each are used to get the optimal combination of working environment setting. Four responses are also measured to know the effect of four control factors. Results shown that by using ANOVA, the effect of illumination, temperature, and instrumental music to the number of ouput, number of error, and rating perceived discomfort is significant with the total variance explained of 54,67%, 60,67%, and 75,22% respectively. By using VIKOR method, it yields the optimal combination of experiment 66 with the setting condition of A3-B2-C1-D3. The illumination is 325-350 lux, temperature is 240-260C, fast category of instrumental music, and 70-80 dB for intensity of the music being played.

Risdiyono,Islamic University of Indonesia
Lecture Notes in Electrical Engineering | Year: 2015

A concept of design by customer (DBC) recently introduced by researchers aims to increase customer satisfaction by opening maximum possible channel for customers to involve in value creation. A comprehensive analysis is needed before applying the concept in order to maximize the opportunity for success. Proposed in this paper is product attribute analysis (PAA), a systematic method to determine the optimum level for customers to involve in defining product specifications so that their fitness to individual customer preference can be achieved without any problem in production process. The analysis starts with identifying the product attributes that customers may focus on and then finding out the corresponding building elements that contribute to the quality of the attributes. A progressive PAA evaluation table is utilized to conduct stage by stage assessments. Based on the table, the flexibility level of the attributes can be identified and the position of CIDPs can be assigned. © Springer-Verlag Berlin Heidelberg 2015.

Mujiburrahman,Islamic University of Indonesia
Advanced Science Letters | Year: 2016

Observing a great deal of violence against children that occurs in educational institutions has made us realize that, in fact, the violence experienced by children has already been greatly widespread. Not only in the household and in the community, but the violence has also been found in a number of educational institutions in Aceh. Educational institutions are supposed to guide students to have good personal behavior, mindset, and character. Yet, in reality, the violence occurred within educational institutions has tarnished the spirit and purpose of the education itself. It has even distanced the students from the expected educational goals. Based on these problems, the study was focused to address several issues on: the factors causing violence against children in schools, the types of violence against children in schools, and the strategies and efforts of the Government of Aceh and the school to address the issue of violence in the school environment. This study was a field study using the combination of qualitative and quantitative methods. The sample consisted of 21 public/Islamic elementary schools (SD/MI), public/Islamic junior high schools (SMP/MTs), public/Islamic senior high schools (SMA/MA), and integrated boarding schools in Aceh. Data were obtained through focus group discussions (FGD), in-depth interviews, and questionnaires. The respondents included students, parents, teachers, police, community leaders, religious leaders, NGOs, and academics. Findings showed that a number of factors have caused the violence acts, among others: Schools had no standard operational and procedures (SOP) in handling problematic children, there was a mindset among teachers that the use of violence was still an effective method in educating the students, conflict issue has also influenced the way to educate children, both by the teachers and the parents, and also the violence legacy (culture of violence) in educational institutions. Generally, the forms of violence in educational institutions in Aceh which often happened and were experienced by the children (students) were more dominant on the aspect of physical abuse compared to the psychological abuse and sexual abuse. The emergence of various forms of violence to children (students) in schools has received serious attention from the Government of Aceh, the government of district/city and the school itself. A number of policies, regulations and programs have been formulated by the government to anticipate and prevent such violence. The schools have also established mechanisms and procedures for handling the children, improved the management and governance of the schools in order to create shared responsibility in taking care the children, publicized and socialized the school rules to the children and their parents as well as the society. © 2016 American Scientific Publishers. All rights reserved.

Elnashai et al. [1] published the best estimated ground motion records of the 2006 Yogyakarta earthquake; however, the digitized data was not available. By using manual processes, the approximate digitized data could finally be made. By using spectral matching, the approximate ground motion digitized data was modified to match up to the original response spectrum published by Elnashai et al. 1. Multi-storey reinforced concrete (RC) structure was used as a building model and Ruaumoko Computer Package Programs [13] was used in this investigation. Since earthquake records in Indonesia are very rare, engineering characteristics of the 2006 Yogyakarta and its implications to the inelastic structural response needs to be explored as compared to the 1940 El Centro earthquakes. Results of the investigation show that the 2006 Yogyakarta earthquake caused higher results in almost all of the ground motion parameters as compared to the 1940 El Centro NSC earthquake. Moreover, the inelastic structural responses subjected to the 2006 Yogyakarta earthquake were also much higher than those caused by the 1940 El Centro NSC earthquake. © 2014 The Authors. Published by Elsevier Ltd.

Fatimah I.,Islamic University of Indonesia | Huda T.,Islamic University of Indonesia
Applied Clay Science | Year: 2013

Organo-clays of cetyltrimethylammonium(CTMA)-intercalated montmorillonite from a naturally occurring Indonesian montmorillonite were prepared. Previous research showed that the insertion of surfactants into interlayer spaces in montmorillonite improved the adsorption of hydrophobic chemicals. The current research focused on the effects of preparation variables, the concentration of CTMA surfactant, the cation exchange capacity (CEC) of the montmorillonite clay and their ratio (CTMA/CEC) on the physicochemical characteristics of the organo-clays and adsorption of toluene. X-ray diffraction (XRD), surface area analysis, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were used to compare the physicochemical characteristics of the modified and unmodified montmorillonite clays. The adsorption of toluene was studied in kinetics and isotherm. It was found that the CTMA/CEC ratio strongly affected the physicochemical properties and adsorption capacities of the montmorillonite surfaces. Adsorption kinetics was evaluated by pseudo-first order, pseudo-second order and Elovich models. Adsorption isotherm was assessed with the Langmuir, Freundlich and Temkin isotherms. The data were best fit by the pseudo-second order model and the Langmuir model. © 2012 Elsevier B.V.

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