Muhammadiyah University of Jakarta
Jakarta, Indonesia
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Sudarwati W.,Muhammadiyah University of Jakarta | Prasetyawati M.,Muhammadiyah University of Jakarta | Ramadhan A.I.,Muhammadiyah University of Jakarta
ARPN Journal of Engineering and Applied Sciences | Year: 2017

Succeed and grow in the competitive Ners Collection needs to have a good management system and measured. Collection Ners have gradually improved the management system among other marketing strategies. Which had been traditional marketing is now online. The impacts of their online marketing are increasing the number of sales. The need for evaluation of the performance of the company to determine whether the increase has been as expected. To know that we need a measurement of overall performance, using the Balanced Scorecard has four perspectives: financial, customer, internal business process and learning and growth. From the results of performance measurements have to be got creative industries beginner's performance on the customer's perspective is 3.00, which means quite. Performance beginner's creative industry on internal business process perspective is 2.9147 which means very pretty. Performance beginner's creative industries on the learning and growth perspective are 3.7698, which mean enough. The overall performance of the company is 3.1958. This indicates the company has enough performance. © 2006-2017 Asian Research Publishing Network (ARPN).

Fadliondi,Muhammadiyah University of Jakarta | Biddinika M.K.,Tokyo Institute of Technology | Ohmi S.-I.,Tokyo Institute of Technology
Telkomnika (Telecommunication Computing Electronics and Control) | Year: 2017

Metal-oxide-semiconductor field-effect transistors (MOSFET) were fabricated using organic semiconductor pentacene. The humidity dependence of drain current gate voltage (ID-VG) characteristic and drain current drain voltage characteristic (ID-VD) will be explained. Firstly, the thermal oxidation method was used to grow SiO2 gate insulator with thickness of 11 nm. Secondly, the thermal evaporation method was used to form Au source and drain electrodes with thickness of 28 nm. The channel width and length of the transistors were 500 mm and 200 mm, respectively. By the same method, organic semiconductor material pentacene was deposited with thickness of 50 nm at vacuum of 7.8x10-6 Torr. The hole mobility decreased from 0.035 cm2/(Vs) to 0.006 cm2/(Vs), while the threshold voltage increased from 0.5 V to 2.5 V and gate leakage current also increased from 5.8x10-10 A to 3.3x10-9 A when the relative humidity increased from 20% to 70%. © 2017 Universitas Ahmad Dahlan.

Dewiyani L.,Muhammadiyah University of Jakarta | Ramadhan A.I.,Muhammadiyah University of Jakarta | Diniardi E.,Muhammadiyah University of Jakarta
ARPN Journal of Engineering and Applied Sciences | Year: 2017

This research aims to improve the competence of students of the Department of Industrial Engineering in Indonesia in the subject of Chemical Industry, in particular through the model-based teaching materials Computer Assisted Instruction in the form of an interactive CD. In particular, the study carried out for the purpose of: (1) Designing and developing models of devices based learning CAI (Computer Assisted Instruction) systematically in prototype form, (2) Produce an interactive CD as a model learning devices Chemical Industry based CAI (Computer Assisted Instruction) to improve the competence of students Department of Industrial Engineering in Industrial Chemistry courses. A product produced in this research is the design of teaching materials based CAI (Computer Assisted Instruction) in the form of an interactive CD that includes the implementation of the design and programming of interactive CD. In this research produced interactive CD and Post Production activities which include activities conducted justification expert evaluation, conducted trials on stakeholders, be revised based on input from experts, and do packing and labeling. It also carried out activities Design and Programming interactive CD, so that the resulting interactive CD is ready for use. © 2006-2017 Asian Research Publishing Network (ARPN). All rights reserved.

Hendrawati T.Y.,Muhammadiyah University of Jakarta | Mubarok M.A.,Muhammadiyah University of Jakarta | Ramadhan A.I.,Muhammadiyah University of Jakarta
ARPN Journal of Engineering and Applied Sciences | Year: 2017

Saffron has been established and used by the widely in both urban and in rural areas especially in a household for various kinds of its usefulness of them as an antiseptic, drug diarrhea, a nonsteroidal anti-inflammatory natural, prevent metastasis (spreading cancer), and made digestion make appetite children increase. The purpose of this research was to study the influence of concentration maltodekstrin to rendemen, the water level, and time the solubility of flour turmeric by using dryer spray (spray blow dryer). Variation composition maltodekstrin used consisting of 6 %, 8 %, 10 %, 12 %, 14 % at the temperature inlet spray blow dryer 120°C. A method of making flour saffron done by means of the pollen from saffron in grated, then sari saffron obtained added maltodekstrin with a variety composition and in stirring use homogenizer that homogeneous. We do drying in spray blow dryer at the temperature inlet 120°C. Testing the physical properties of flour saffron produced covering the water level, and rendemen solubility of time .As his application flour saffron then used as the adder power appetite on child is feasible. The research results show that rendemen largest namely 3.40 % there are in samples of 14 % and are the condition of the best with the regression equation is y = -0.014x2 + 0.0474x - 0.370 R2 = 0.877 which has the water level best to standard products powder is as much as 4 % the regression equation is y = 0.017x2 - 0.535x + 7.9 R2 = 0, 952. The solubility of the fastest time where the sample concentration maltodekstrin 6 % during 416 second by the regression equation is y = 8.267x2 - 72.73x + 601.4, with R2 = 0,917. In testing kurkumin content done testing in hplc where prove kurkumin levels in flour saffron of 3.01 % . © 2006-2017 Asian Research Publishing Network (ARPN).

Ramadhan A.I.,Muhammadiyah University of Jakarta | Diniardi E.,Muhammadiyah University of Jakarta | Dermawan E.,Muhammadiyah University of Jakarta
AIP Conference Proceedings | Year: 2016

Heating or cooling fluid is a major requirement in the industrial sector, including transport, energy and production needs of the field and the field of electronics. It is known that the thermal properties of the working fluid hold an important role in the development of energy efficiency of heat transfer equipment. The cooling system can be improved either by replacing conventional cooling fluid from the fluid into the fluid of water mixed with nanoparticles (nanofluid). The method of this research is to analyze the calculations and numerical simulations of the nanofluid Al2O3-Water with the volume fraction of 1% and 3% coolant fluid using CFD Codes. The results of this research show the rate of heat transfer at the increasing velocity of fluid flow, with the velocity of 5 [m/s]. Whereas the 3% nanofluid have greater value than the 1% nanofluid and water, as well as for the velocity of 10 [m/s] which has almost the same pattern. Shown that the concentration of nanofluid has a value effective for improving heat release along the fluid flow rate. © 2016 Author(s).

Fithriyah N.H.,Muhammadiyah University of Jakarta | Erdawati,State University of Jakarta
Journal of Engineering Science and Technology | Year: 2015

An environmentally friendly process were employed to prepare samples of recycled paper, as well as the coating solution of chitosan nanoparticles and dispersion of Ca(OH)2 particles. The nanomaterial was tested for antibacterial and acidity neutralising functions to preserve the strength and colour of paper samples. The paper samples were then characterised for physical and morphological characteristics, as well as chemical and mechanical properties. At concentrations of 0.125 and 0.25 mg/L, the chitosan nanoparticles (23-62 nm) were observed to retard the propagation of E. Coli and S. Aureus bacteria up to 22 and 26 mm in diameter, respectively. This propagation was also hindered by an increase in acidity introduced by Ca(OH)2 nanoparticles. The grammage, firmness, and colour of coated paper samples were not significantly influenced by nanoparticles concentration or coating thickness due to the low mass-to-area ratio of coating. Nevertheless, the tear strengths and cracking resistance of coated paper were improved. Chitosan nanoparticles in the coating potentially functioned as a sizing agent by diffusing into the pores of paper fibres and increasing the interfibrillar bonding, while the nanoparticles of Ca(OH)2 apparently preserved the strength and colour of paper samples by neutralising the acidity and thus preventing microbiological attacks. © School of Engineering, Taylor’s University.

Hendrawati T.Y.,Muhammadiyah University of Jakarta
Journal of Engineering Science and Technology | Year: 2015

Aloe vera powder was produced from gel of Aloe Chinensis Baker from Pontianak, Indonesia. The effect of drying air inlet temperature to produce Aloe vera powder from Aloe Chinensis Baker was studied. Gel of Aloe Chinensis Baker was crushed, evaporated, mixed with maltodextrin and dried in a Shimadzu counter current spray dryer.Dryingair inlettemperature in spray dryer was varied110°C, 120°C, 130°C and 140°C. The raw material was analysed such as proximate, amino acid, calcium, magnesium, phosphor, lead, sodium, potassium and mangan. The product, Aloe vera powder was analysed such as appearance, colour, water content, pH, density, microbiology and the result was compared with Aloe vera powered commercial from Terry Labs. The active compounds on Aloe vera powder was analysed using LC-MS. InLC-MSdetectedcompoundsin the form especiallyionsM+H, sothere areadditionalmolecules intoionsin theM+1.This method was applied to determine five compounds in evaporated Aloe vera gel, Aloe vera powder (with drying inlet air temperature 110°C, 120°C, 130°C, 1400C). Aloin A and B, aloenin (B), aloesin and chrysophanol could be detected in all of samples. Aloe-emodin could not be detected in all samples. Aloeresin A could be detected in evaporatedAloevera gel, Aloe vera powder (with drying inlet air temperature 110°C, 120°C). The result was shown that the optimum air drying air inlet temperature was 1200C to produce Aloe vera powder which all of phenolic compounds of Aloe verapowder can still be maintained.Some of quality parameters such as water content, pH, solubility, colour, appearance, and microbiology are compliance with the standard of available commercial product. © School of Engineering, Taylor’s University.

Ismiyati,Muhammadiyah University of Jakarta | Purnawan I.,Muhammadiyah University of Jakarta | Kadarisman M.,Muhammadiyah University of Jakarta
MATEC Web of Conferences | Year: 2016

Indonesian government efforts, particularly in the city of Depok, regarding decent and healthy environmental management in the waste sector have to be enhanced. This is a complex and diverse problems, even though the government has set into the form of Law (UU) Number 18 Year 2008 on Waste Management to build a strategic partnership of stakeholders in waste management. The Government has also issued Government Regulation of the Republic of Indonesia Number 81 Year 2012 on "Management of household waste and household-like waste". Further research is required on what extent that the implementation of waste management had been undertaken, as well as the necessity to study the methods of environmental insight in waste management. Waste management needs to be comprehensive and integrated from upstream to downstream, thus providing economic benefits, people healthiness and environmental safety. The purpose of this study is to analyze the effectiveness of environmental management based in Depok. This study uses qualitative design, which is to observe, understand and expose reality or empirical phenomena; hence the proper method used is descriptive method. Instrument to gather the data is completed by observation and in-depth interviews. The type of data required includes primary and secondary data. The informant is selected by purposive sampling, and data analysis is treated with triangulation technique. The results present that in the framework of the effectiveness of environmental management based trash in Depok showed that 1) Institutional Factor for Urban Waste Management of Depok has run properly, 2) Private partnership (commercial solution) to be involved in urban waste management in Depok is being explored, 3) Applicable technology in fostering a culture of 3R (reduce, reuse and recycle) on the entire community of Depok, has been done with the declaration of Depok Trash Care towards Trash Clean 2020 in March 2014. © Owned by the authors, published by EDP Sciences, 2016.

Sjaiful Alim E.,Muhammadiyah University of Jakarta
Workshop Proceedings of the 20th International Conference on Computers in Education, ICCE 2012 | Year: 2012

This paper is a research report concerning Computer-Assisted Language Learning (CALL), used as medium of teaching English; in terms of looking for significant correlation between the Students' attitude towards ICT with the students' learning achievements in English. This is a kind of experimental research; where the data processing was performed by using descriptive statistics that aimed to know; the mean, the median, the range, the standard deviation, the variance, the minimum and the maximum score, and the presentation of the data forms to show the frequency of distribution and in a histogram. Based on the calculation of the correlation score, the research variables have positive correlation and it can be said that there is quite strong and significant correlation with the significance level of 5% (Sig. < 0.05). It means that all the three hypotheses stated or presented in this study could be accepted.

Fithriyah N.H.,Muhammadiyah University of Jakarta | Erdawati,National University of Indonesia
AIP Conference Proceedings | Year: 2014

Chitosan were selected as cellulose raw material to prepare coating solutions. The morphology, physical characteristics and chemical surface properties of the coatings are discussed in this paper. Different concentrations of chitosan (1-5% w/w) and deposited solution layer (0.5-1.00 μm) were used to obtain coated papers with thicknesses varying between 0.062-0.068 μm. The percentages of coating agent impregnated inside paper were also calculated from the apparent density of coated paper and the density of self-supported films prepared in the same conditions but deposited on an inert and smooth Plexiglass support. These percentages of impregnation ranged from 4.8 to 63.3% and increased as following: chitosan < chitosan nanoparticle. The resulting absorption rates indicated significant differences as a function of the nature of coating agent and confirmed results obtained for the percentage of impregnation. To explain differences in the behaviour of coating solutions, it was finally concluded that not only their viscosity must be taken into account but also their affinity toward paper. © 2014 AIP Publishing LLC.

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