Entity

Time filter

Source Type


Daryono E.D.,National Institute of Technology Malang
International Journal of ChemTech Research | Year: 2015

The purpose of this study was to obtained optimum conditions a reactive extraction process in isolation eugenol from clove essential oil associated with the temperature and time process. Research stage begins by inserting a 100 ml clove essential oil and 0.8 N NaOH solution at a ratio of 1:1.1 to the reactor. Turn on the hot plate and set the appropriate reaction temperature variables of the study (30, 40 and 50°C) and set the stirrer speed of 100 rpm. After a reaction time achieved according to the study variables (15, 30, 45, 60 and 75 minutes) the reaction product was then separated. The bottom layer was Na-eugenolat (aqueous layer) and the top layer was organic layer. Na-eugenolat (aqueous layer) was then added 5 N HCl to obtain a pH of 4. Before placing distillation flask, Na-eugenolat that has been mixed with HCl silenced while for NaCl precipitate formed, then the newly inserted distillation flask which had been fitted condenser and thermometer. The mixture was then heated with a hot plate at a temperature of 195ºC and vacuum pressure of 6.10-2 kPa for 30 minutes. Distillate was eugenol and the residue was NaCl residual reaction products. Eugenol distillate which was then measured its volume and analyzed eugenol concentration by GC. The optimum process conditions obtained in the reactive extraction temperature of 40ºC, reaction time of 30 minutes at a concentration of eugenol of 51.07% and yield of 97.10%. © 2015, Sphinx Knowledge House. All rights reserved. Source


Suyono H.,Brawijaya University | Hayusman L.M.,National Institute of Technology Malang | Dhofir M.,Brawijaya University
ARPN Journal of Engineering and Applied Sciences | Year: 2015

The modeling and analysis of Dynamic Voltage Restorer (DVR) implementation for improving the voltage sag due to the motor starting and disturbance occurred in the system is discussed in this paper. DVR is installed through a transformer in series connection between the feeder and a sensitive load to compensate the voltage sag. To show the impact of DVR implementation, the dynamic analysis is performed with the following short-circuit scenarios such as single-phase-, double-phase-, and three-phase to ground faults. In addition, the voltage sag due to the motor starting is also investigated in this paper. Based on the simulation results show that the voltage sag reach 0.83pu, 0.78pu, and 0.69pu for the single-, double-, three-phase to ground faults implemented respectively. The DVR implementation mitigates the voltage sag with improving the voltage up to 0.99pu, 0.95pu, and 0.91pu for the single-, double-, three-phase to ground faults cases respectively. The DVR implementation also improves the voltage profile during the motor starting of the largest motor load with a capacity of 55 kW up to 0.99pu instead of without the DVR implementation which the voltage sag reach to 0.92pu. The increasing of voltage profile improvement on the system will need more active and reactive powers acquired from the DVR. © 2006-2015 Asian Research Publishing Network (ARPN). Source


Utaminingrum F.,Brawijaya University | Somawirata I.K.,National Institute of Technology Malang
Proceedings - 11th International Conference on Signal-Image Technology and Internet-Based Systems, SITIS 2015 | Year: 2015

This paper proposes rain streaks removal by combining of the smoothing methods and image enhancement. We design an efficient method for detecting and removing rain streaks in the image. The rain streaks component is obtained by reduction of the original image rain streaks with blur image, and then conducted in the quantization process. Regarding to the image quantization results, we can find a non rain streak and rain streak components. Furthermore, rain streak components are replaced by the pixels of enhancement image results that generate non-rain estimation. Finally, by implementing artefact removal from the summing of the non rain component and non rain component estimation of an image generate a rain removal method. Simulation results show the proposed method successfully eliminate the rain streaks and maintain non rain streaks. © 2015 IEEE. Source


Daryono E.D.,National Institute of Technology Malang
International Journal of ChemTech Research | Year: 2015

The purpose of this research was to assess the effectiveness of the use of co-solvent n-hexane for in situ transesterification reaction mahogany seed oil as a biodiesel. Variables and operating conditions include catalyst KOH 0. 075 mol/L, stirring speed of 600 rpm, 40oC the reaction temperature, % FFA oil is 1, 42%, moisture content seed of 0. 8%, reaction time is 2, 4, 6, 8 and 10 hours and the mass ratio of seedl:methanol:n-hexane is 1:3:2, 1:3:3 and 1:3:4. Mahogany seeds that have been dried and pulverized size +20/-30 mesh as much as 50 grams included in the three-neck flask equipped condenser and added methanol, n-hexane and catalyst KOH and the reaction carried out in accordance with the variables and operating conditions. After the reaction is complete, the filtrate and cake was separated. To stopped the reaction with neutralized the KOH catalyst with added HCl 1 mol/L to pH 4. The filtrate distilled at a temperature of 70°C and the residue distilled included in the separating funnel and allowed to stand for 12 hours in order to form two layers. From the research data obtained the best results at a mass ratio of seed:methanol:n-hexane is 1:3:4. and reaction time 4 hours with yield methyl esters of 88. 18%. Methyl ester density 0. 8791 g/cm3 meet SNI 04-7182-2006 from 0. 85 to 0. 89 g/cm3. © 2015, International Journal of ChemTech Research. All right reserved. Source


Suhartono,UIN Maulana Malik Ibrahim Malang | Mahmudi A.,National Institute of Technology Malang
Journal of Theoretical and Applied Information Technology | Year: 2014

Earthquake early warning service for tsunami is important for the public. On one side the service cannot be easily accessed by the public especially television users. On another side the development of television technology, especially digital television, should be much easier to access. The purpose of this research is to make the method of processing data in Multimedia Home Platform (MHP) Applications for Earthquake Early Warning of Potentially Tsunami Services. Earthquake and weather data are taken from the web site Application Programming Interface (API) by The Meteorology, Climatology, and Geophysics (BMKG) in Indonesia. The research method is parsing techniques eXtensible Markup Language (XML) with the Document Object Model (DOM). The time interval for data collection from the Web site of BMKG uses the method of Systematic Sampling. Therefore, MHP applications can update Earthquakes and weather data in real-time in a specified interval. The results of XML parsing form of tsunami potential earthquake data are recorded by MHP applications into file storage. The findings show that MHP applications can display earthquake early warning of potentially Tsunami information to users of television accordance with BMKG website in real time. © 2005 - 2014 JATIT & LLS. All rights reserved. Source

Discover hidden collaborations