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Published by Institut Sains dan Teknologi AKPRIND

ISSN : 19798415 EISSN : - DOI : -

Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Search results for , issue "Technoscientia Vol 2 No 2 Februari 2010" : 17 Documents clear

SISTEM DATA LOGGER TINGGI MUKA AIR PADA DAERAH ALIRAN SUNGAI (DAS) BERBASIS MIKROKONTROLER Muhammad Andang Novinato
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

This paper discusses about a distance of water level measurement system which takes a case in a drainage basin. The collected data in data logger will be used as a reference for decision makes concerning the water rate of flow accumulation so we will be able to predict flood or landslide disaster early. The research purpose was designed a digital water level telemetry system to acquire a database system digitally. The results show that the system works well as expected.

IDENTIFIKASI GERAKAN TANAH DI DAERAH TINATAH KECAMATAN ALIANâ€“KEBUMEN Nur, Arief Mustofa
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Land movements in Tinatah, Alian Districtâ€“Kebumen occured since 2005. Ap-proximately 40 families from 80 families are in high risk when rapid landslides occur in this area. The aim of this study is to identified the high risk and relatively safe areas. The used method was by field survey to obtain natural conditional data, landslide indications, range finder measured to local topographic map, laboratory analysis of engineering properties of soils, and evaluation of potential landslide. The study finds land movements in Tinatah area were caused by lithology of marl-claystone, structural geology of trace of anticline and fault. The low of slope causing land movement very slow with creeping type. The highest risk area is the trace of anticline with marl-claystone lithology (RT 6 RW 2). The more stable locations are the location with calcarenite lithology (RT 8 RW 2) and andesite breccia (Kalinanas). Anticipatory steps that can be done by stabilize of slope, drainage regulation, socialization, relocation to more stable places.

OPTIMASI KOEFISIEN TRANSFER MASSA PADA EKSTRAKSI MINYAK BIJI KETAPANG Purwanti, Ani; -, Sumarni; -, Sugiyanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Mass transfer between solid and liquid is commonly found in extraction process. Oil extraction from catappa seeds was carried out in the stirred flask using normal hexane as a solvent. The aim of this research is to show a dimensionless equation of a Sherwood number {/} as a function both of Reynolds number {/} and Schimdt number {/}. The experiment was conducted in the room temperature, around 290C, stirring speed 500 rpm, blade diameter 2 cm, and the ratio between the mass of catappa seeds and the volume of solvent was 20 gr/100mLâ€“20 gr/200 mL. The calculation error was 0.072%. Based on the research, it is found that Sh = 0,2166.106 . Re-1,506. Sc1,120.

PEMODELAN ALIRAN DAYA PADA SISTEM ENERGI MOBIL LISTRIK Kaloko, Bambang Sri
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The issue of the depletion of oil reserves in the world, and the problem of air pollution produced by motor vehicles, motivate many researchers to seek alternative energy sources to propel the vehicle. One promising way is to replace combustion motor with an electric motor, which is known as an electric car. First stage of this research is to model the flow of power in the electric car energy system to obtain its characteristics. Power flow efficiency in electric cars is very important because this type of car is highly dependent on the limited electrical energy supplied by a battery. Therefore it should be managed properly. This study is to look into the power flow calculation so that the amount of electrical energy is in accordance with the needs of electric cars. A model using Simulink software is to get the best power flow response to the electric car energy system.

KUALITAS BAKTERIOLOGI PADA DEPOT AIR MINUM ISI ULANG DI KOTA PONTIANAK TAHUN 2007 -, Suharno; Nasip, Muhammad; Iskandar, Dodi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Based on the datas of health departement of Pontianak City, the Number of the refill drink water storehouse had been achieved 57. People as consumer of it have the right to get insurance of health and safety. Therefore there was needed to study bacte-riolgical test.This study was to get datas and to learn the coliform bacteriological contents of raw water and processed water on the refill drink water storehouse in Pontianak City. Raw water resource in Pontianak was 100 % derived from mountains. It covered 77.2 % of Anjungan, 12.3 % of Paniraman, 10.0 % of Sui Purun. It had Most Probable Coliform Number and Echericia Coli Number were 71.9 % and 59.6 % in sequence. These did not fulfill the requirements of health standard yet. Like wise, processed water of storehouse in Pontianak possessed 33.3 % of Most Probable Coliform Number and 15.4 % of E.Coli Number. The quality of raw water had significant coherence with Most Probable Coliform Number and Echericia Coli Number. Other factors that related to product of processed water quality were: The protection of raw water, disinfection processing, and water re-filling processing to plastic flask. Hence, the advice for processing manager of drinking water were to more taking a care the quality by disinfection pretreatment and protection. It was suggested for the health department to monitor and to evaluate continuesly at least every six months. It was recommended to people to choose selectively became customer of refill drinking water storehousers. Choose between them that had steril and saniter processing.

SIMULASI KENDALI JARAK JAUH BERBASIS WEB Priatna, Edvin
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Control of household electrical equipment is not only expected to be done at the time were in the house, but at the outside of the equipment is expected be monitored and controlled remotely. To overcome this, so here tried to do a simulation to determine the condition and also manually control remotely electrical load. Control system used is by using a web-based client server, the exchange of data in the internet network to a web client program, which serves submit requests via the HTTP GET method or POST, while the program is functioning as a web server waiting for requests and serves to transmit the web to web data request. The results of testing control systems tested on local networks, electrical load can be controlled manually via the button directly and via the browser and the electric load condition changes due to manual control can be monitoring from the browser.

ADAPTASI ALGORITMA GENETIKA UNTUK MASALAH PENJADWALAN ULANG DENGAN TEKNIK SISIPAN PADA SISTEM MANUFAKTUR JOB SHOP DINAMIS NON DETERMINISTIK Asih, Endang Widuri
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The scheduling of a non-deterministic dynamic job shop was a matter of orga-nizing an amount of operations for certain machines with different sequence for different job, whereas the output of the job varies and was previously could not be determined. The purpose of the research was to minimize the mean tardiness of lateness of a job whether it was either an active job or non-delay, ahead of schedule or the rescheduled, and a prioritized job or the non priority. The research used genetic algorithm approach to determine the problems occurred in the scheduling or the rescheduling of a non-deter-ministic dynamic job shop. The function of fitness of the research functioned as the goal, whereas the best fitness output was the fitness with the biggest minimum mean tardiness. The best fitness for an ahead of schedule, either active or non-delay, was the ones with the exact fitness value of 0,0256410The same goes for early scheduling, either with or without priority, which had the exact output of 0,0256410. For a new job, either active or non-delay, had the exact fitness output of 0, 0148148. A different resulted for the resche-duling of a prioritized new job that had the best fitness output of 0, 0077295 for active job; and 0,005868 for a non-delay job. Rescheduling could be done by doing a job insertion in the beginning of the schedule. It was seen that in the beginning of the schedule, whether active or non-delay, the fitness was 0,0245610 and afterwards by adding job 6, job 7 and job 8 the output of the fitness differed accordingly with the case of the job.

MODIFIKASI MEJA KERJA MENURUNKAN BEBAN KERJA PEKERJA KERAJINAN LOGAM DI KABUPATEN TABANAN BALI Adiatmika, I Putu Gede
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Ironwork industries is the major work for the employee at Tabanan Bali. Export of product could give more income for the goverment and human life. Many of order make them work overtime to fill the target by working overtime. The impact was more stress and cause workload increased, but productivity decreased. An effort to decrease emplo-yeeâ€™s workload is one of the program in order to reduce the stress through ergonomic intervention. Ergonomic analysis found that there was work posture problem caused by low of work table sgtation. Improvement of work table station was aim to decrease the workload. This experiment was conducted on January â€“ June 2006 at ironwork handicraft employee at Tabanan Regency. Design of research is pre-post group design and treat-ment by subject. Intervention was done through modification of work table height that was designed based on elbow height. Subject were 30 skill employee from 6 workshops. Data assessed were heart rate, elbow height, work heart rate using 10 pulse method and ana-lyzed by t-test. The result showed that an impact of table modification to decreased of workload (p > 0.05). The magnitude of impact was 27.26 %. It,s suggested that the em-ployee should use table modification regularly through adaptattion process for optimum effect.

EXTREME LEARNING MACHINE: APLIKASI PADA SHORT TERM LOAD FORECASTING Mokui, Hasmina Tari
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Accurate load forecasting becomes an important task for operating and planning of a power system to maintain the security of power supply dispatched to the consumers. This paper proposes an advanced method, namely Extreme Machine Learning (ELM), to forecast load in short time period. It is observed that implementation of the ELM can redu-ce cost and time significantly. Comparison results with a well known algorithm, called the Back Propagation (BP), show that the ELM can converge a hundred times faster than BP. In addition, the ELM needs 100 hidden neurons while the BP needs 2 hidden neurons to achieve similar result. This reveals that the number of hidden neurons is not a problem for ELM as long as there is sufficient memory to perform its computation.

KINETIKA REAKSI HIDROLISIS GULA DARI TETES TEBU MENJADI ASAM OKSALAT Andaka, Ganjar
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The kinetics of the hydrolysis of sucrose from molasses have been studied in basic aqueous solutions in the presence of potassium hydroxide. This chemical reaction is to produces oxalic acid as main product. The experiments were conducted in the flask which was completed with stirrer, heater, condenser, and thermometer, at temperatures from 80 to 100oC and at reaction times from 30 to 60 minutes. The product of hydrolysis of molasses was analyzed by using standard solution of potassium permanganate to determine the amount of oxalic acid. The results of these investigations show that the kinetics reaction of the hydrolysis of molasses was found to be first order reaction with respect to sucrose. The reaction rate constant was found to be k = 0,2055 exp(âˆ’3367,7663/RT) (in minutesâˆ’1) or the activation energy and pre-exponential factor was 3367,7663 cal/gmol and 0,2055 minutesâˆ’1, respectively.

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