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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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PETA KENDALI-P UNTUK CACAT PRODUKSI KAIN DI PT RANJANG GAJAH TEKSTIL MENGGUNAKAN PENDEKATAN CONTROL CHARTS -, Noeryanti
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The aim of this study was to know the a mount of production prosess ability at PT Ranjang Gajah Tekstil, by data of defect production. The observation based on secondary data, whereas the analysis approach used was p-control graphic with control chart.By using p-control graphic, it seemed that there was observation out of control caused by uncontrol production. Through some improvements, the result which was abtained showed that production process ability caused by lusi movement decreasing 0,163%, pakan movement decreasing 0,259%, ngapuk decreasing 0,054% , and sobek decreasing 0,041%.It was found that the special cause of defect data of lusi movement were, one the 21st observation cause of rusty sisir the 33rd, 34th adn 37th ones cause of broken fork gird. For pakan movement defects found that on the 1st, 2nd, 3rd, 16th, 17th, and 52nd ones caused by loose shuttle, on the 4th and 5th ones cause of less good shuttle replacement, and on the 6th one cause of sisir kecak. Therefore the result of this study used by the company in order to do improvements and be able to observe process ability continually in order to be stable.

ANALISIS REAKSI BERANTAI PADA TAHAP PROSES PENGELASAN DI PT MULTIFAB Wisnubroto, Petrus; Asih, Endang Widuri; Gunawan, Indra
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

MULTIFAB is a company engaged in the field of technical companies highly specialist themselves in the field of production, fabrication equipment and specialized structures used in the chemical industry, petrochemical and oil and gas. In the normal process of production, especially in the welding process, its output is still a lot of experience of disability. Efforts to increase product quality and prevent and minimize product failure, this requires an analysis of quality control that is with a chain reaction analysis. From the data processing, as an early stage concept identifiers use problem FMEA, failure indicates that the effects of the highest-rated Slag Inclusion Risk Priority Number (RPN) at 256. Stage of quality improvement can be made using the method of Kaizen Kaizen is the Five-Step Plan and the 5W 1H. Chain reaction from the results of quality improvement. This is done by measuring the productivity of labor performed before and after improvement of quality. From the measurement of productivity, an increase of 0.01 and calculating the cost of reworks the calculation result of Rp 880 956. Based on the results of processing data on improved quality, causing a chain reaction that is after improved quality, productivity will increase and production costs willdecrease because the repair of products will be reduced.

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.

CADANGAN SUMBERDAYA AIR UNTUK MENUNJANG PENGEMBANGAN WILAYAH KABUPATEN TASIKMALAYA Hartanto, Priyo; Suriadarma, Ade; -, Saifudin
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Tasikmalaya District occupied the area of 2.680,47 km2 and located on the elevation between 0 to 3,000 m above sea level with hilly, highland, and slopy morphology. Dry month occurred on August, while wet months occurred on the period of September to July. The average monthly precipitation is ranged between 92 â€“ 320 mm with total of yearly precipitation 2,532 mm. The monthly precipitation is ranged between 96 â€“ 116 mm, with total of yearly evapotranspiration about 1,307 mm. Water reserves in Tasikmalaya District is ranged between 23 to 207 mm, covering in the area of 2,680.5 km2, then total of reserved water is 1,306,515 m3 to 11,758,655 m3. Water for domestic needs is 222.150 m3/day. 169.805 m3/day excess water can be used for approximately 117.920 hectares agriculture or approximately 393.067 hectares of land crops.

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.

OPTIMALISASI METODE PENDISKRIPSIAN BATUGAMPING UNTUK KARAKTERISASI RESERVOAR HIDROKARBON DALAM PEMODELAN GEOLOGI -, Premonowati
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Core/SWC and/or cuttings data from carbonate reservoir have to optimalized in their descriptions, actually for understanding their carbonate characterization. The cha-racterization is includes lithofacies and visible porosity. The method are consists of: core recovery, texture, orga-nism abundance, specific features, type and porosity percentage that have resulted a visible porosity. The precise calculation of visible porosity and factors of pore forming are best way to get a cementation factor which easily changes both ver-tical and horizontally. The carbonate depo-sitional facies and diagenetic process are use-ful to get a diagenetic unit that confirmed by cemen-tation process.

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.

ANALISIS BEBAN KERJA MENTAL DENGAN METODA NASA-TASK LOAD INDEX Simanjuntak, Risma Adelina
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 1 Agustus 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

C.V Pinus Bagâ€™s Specialist runs for manufacture, especially in making many kinds of bags. By keeping quality of the products, it is the key to reach the goal of the company. This company applies production system of make to order which the orders have different model, numbers, and uncertain time cause mental workload was often felt by the workers. Therefore, it is studied by analyzing mental workload.In the study of men-tal workload, it was used the measurement of workload subjectively by using NASA-Task Load Index (TLX) method. This method is very effective for content 6 indicators (mental demand, physical demand, temporal demand ,performance, efforts, and frustration de-mand) with 16 employees of the company as respondents.The result that is obtained in this study shows that the mental workload NASA-TLX which is accepted by the employ-yees have been in high condition of workload. This can be seen based on the average of Weight Workload (WWL) with scale category; low category (0-9) is no employee, average category (10-29) is no employee, pretty high category (30-49 is no employee, high cate-gory (50-79) is 13 (thirteen) employees, very high category is 3 (three) employees. There-fore, the company needs to care optimal rest schedule to decrease work risk and re design of tasks and workplace in ergonomic.

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.

Page 23 of 59 | Total Record : 583

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