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2013-05-08 08:51:40
Untag Telah Luluskan 35.000 Sarjana
2013-05-08 08:51:25
FKIP Untirta Gelar Gebyar Hardiknas 2013
2013-05-08 08:50:53
Hasil penelitian wajib disertai sosialisasi

Publikasi Penelitian Dosen

Application of Six Sigma and AHP in analysis of variable lead time calibration process instrumentation

Calibration of instrumentation equipment in the pharmaceutical industry is an important activity to determine the true value of a measurement. Preliminary studies indicated that occur lead-time calibration resulted in disruption of production and laboratory activities. This study aimed to analyze the causes of lead-time calibration. Several methods used in this study such as, Six Sigma in order to determine the capability process of the calibration instrumentation of equipment. Furthermore, the method of brainstorming, Pareto diagrams, and Fishbone diagrams were used to identify and analyze the problems. Then, the method of Hierarchy Analytical Process (AHP) was used to create a hierarchical structure and prioritize problems. The results showed that the value of DPMO around 40769.23 which was equivalent to the level of sigma in calibration equipment approximately 3,24σ. This indicated the need for improvements in the calibration process. Furthermore, the determination of problem-solving strategies Lead Time Calibration such as, shortens the schedule preventive maintenance, increase the number of instrument Calibrators, and train personnel. Test results on the consistency of the whole matrix of pairwise comparisons and consistency test showed the value of hierarchy the CR below 0.1.

Penulis : BAMBANG CAHYADI, ST., MT [PDF File] didownload : 36 x

Design of Fatigue Monitoring Apparatus based on Critical Flicker Fusion Frequency

Fatigue is the phenomenon when alertness decreases gradually that potentially affect

work quality and safety. Though a number of research have been done to develop fatigue

monitoring apparatus, this phenomenon is still difficult to be detected in real time in industry.

Hence, there is a need for a portable and sensitive apparatus to monitor fatigue. The purpose of this

study is to develop an ergonomic design of a portable flicker test apparatus based on Critical Flicker

Fusion Frequency (CFFF). Product concept was developed using a proposed framework, namely

human factors system design framework. The proposed framework was based on user needs, user

characteristics, and user functional allocations. A prototype was build and a usability testing was

finally conducted.

Penulis : DESINTA RAHAYU NINGTYAS, ST., MT [PDF File] didownload : 35 x

The Effect of Temperature Increase, Holding Time and Number of Layers on Ceramic Shells using The Investment Casting Process

This study aimed to determine the effect of using acrylonitrile butadiene styrene in place of conventional wax material on treatment pattern removal in the investment casting process. There are three controllable process variables that can affect treatment pattern removal, which include temperature increase, holding time and the number of layers of ceramic shell that have been considered for comparison. Comparison among the effects of temperature increase, holding time and numbers of ceramic shell layers on the ceramic shell was analyzed using ANOVA. It was found that temperature increase (Tx), holding time (t) and number of layers of ceramic shell (N) contribute significantly to the length of the crack (l) on the ceramic shell. The crack in the ceramic shell’s surface was analyzed using scanning electron microscope photos. Less layers number cause the increase of crack length. The combination between temperature upraise and longer holding time cause cracking delay. The experimental is conducted by using 3 (three) variants for each of layers number, temperature and holding time. The layers number is ranging between 7-9 layers. Temperature increase from room temperature until 1300oC. The layers number variant is ranging between 180-300 seconds. It was concluded that a longer holding time will result in a more intact ceramic shell, as longer holding times yield short crack lengths.

Penulis : Agri Suwandi, Dr., S.T., M.T. [PDF File] didownload : 32 x

Development of Pattern Smelting Method with ABS Material in Investment Casting Process

Investment Casting (IC) is a method of produce high quality casting. It is useful to generate complex geometry in casting product, which can’t be achieved by forging, machining, or machining process with excessive material usage. Current, IC pattern is made of wax. The pattern is coated with refractory material. The wax melts away during the molted metal pouring. In the past, it is stipulation that once a foundry used a particular grade of pattern wax, then they couldn’t be replacing by other grade. This was to avoid the risk of dimensional variation of patterns, coupled with a basic fear of change. The pattern wax compounds have been chosen by foundries with numerous considerations, such as: historical record; the wax the only suitable compound at the time; professional recommendation; and copying from another foundry. Inappropriate wax injectors parameter can create low quality pattern and ceramic shell. Nowadays, there are wide ranges of material available as an alternative for the IC wax pattern, which in this paper initially highlighted using Acrylonitrile Butadiene Styrene (ABS) as a replacement of conventional pattern material. The pattern with ABS material can be created by Rapid Prototyping Machine (RPM) that is Fused Deposition Modeling (FDM) technology. The experimental outcomes are: there are crack in the ceramic shell while using smelting chemical method because ABS material pushed out the shell; perfect ceramic shell with ABS pattern smelting while using burn-out method; and burn-out method application can  reduce 3 (three) step in investment casting process.

Penulis : Agri Suwandi, Dr., S.T., M.T. [PDF File] didownload : 42 x

Research – Design & Development of Fast Customized Manufacturing for Prostheses TKR Based on Rapid Prototyping

The challenge for engineer’s orthopedic prosthetic rehabilitation is to find a state of the art in the field, technical or otherwise, that will help their clients who have disabilities. Organ replacement with prostheses is one of the most successful procedures until now. However prostheses are still using standard geometry that has been determined by the manufacturer of the prostheses and it becomes a problem. In addition to the design size that does not fit, long manufacturing process takes time and is expensive also being a problem. Suitability of the prostheses with the patient's body anthropometry and speed of production in the manufacture of the prostheses is very important. In manufacturing, precision and speed of manufacture of the product is something that is possible but requires a high cost, especially in the manufacture of prostheses. By using rapid prototyping technology are available, this research try to develop the customized and rapid manufacturing systems for the manufacture of prostheses, especially for Total Knee Replacement (TKR).

Penulis : Agri Suwandi, Dr., S.T., M.T. [PDF File] didownload : 36 x

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