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INDONESIA
Journal of Dynamics
Published by Lembaga Layanan Pendidikan Tinggi Wilayah X
ISSN : -     EISSN : 25020692     DOI : -
Core Subject : Engineering,
Engineering
The International Journal of Dynamics in Engineering and Sciences (IJDES) is a fully refereed international journal, which publishes original research papers and survey articles in all subjects relevant to dynamics in engineering, sciences and analytical and numerical solution. The highest priority will be given to those contributions which discuss practical problems, the establishment of dynamic models, the determination of a solution, approximate or exact, analytical or numerical development of the results to the real-life problems. Manuscripts which discuss new analytical techniques for new dynamics in engineering and sciences problems in different fields of science and engineering are also encouraged.
Arjuna Subject : -
Articles 22 Documents
 1   2   3 
Design of the Bank Customer Queue Application Based on the Switch and Sound Visualization Yusuf, Yuhendra; Februanda, Sudindri Rahmad
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Publisher : Kopertis Wilayah X

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Abstract

Activities or community needs the same individuals, especially in the public interest would lead to an activity that requires a service. Limitations of service will cause the queue. This sort of thing (queue), often found at the center of public interest, such as the line at the bank, bill payments (electricity, telephone, water), and so forth. Services at the bank, for example, customers who would require the service is to be in line to wait his turn to receive services. However, it must gain an awareness of costumer that public services should be optimal and primed with an adequate level of discipline from the culprit himself and cooperation among them. In order for such activities as expected, it is necessary to raise awareness in the culture culprit line up with the queue system, namely in the form of electronic line computer-based program. The device is designed in the form of software which is controlled by the switch, the line number is displayed on the monitor screen, and dialing by voice from the speaker. In this research, the Visual Basic 6.0 as an application developer, Ms. Access as DBMS, and Cool Edit Pro version 2.0 as a recorder and sound manipulator. Thus, this application can help a bank officer to call a customer in the queue to get the service, so that more optimal service to customers, excellent and efficient.
Force Reduction of Circular Cylinder using Square Disturbance Body at 600 Angle by 2D Numerical Simulation Unsteady-RANS Putra, Meiki Eru; Rina, Rina; Nofriyandi, R; Sumiati, Ruzita
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Publisher : Kopertis Wilayah X

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Abstract

Drag is an aerodynamic force that appears when the flow past the bluff body circular cylinder. Drag strongly influenced by the flow separation point. One of the ways reducing the drag force that is to control the flow by placing the disturbance body on the upstream side at a certain angle. Previous research has found at 60º angle of flow separation is faster than a single cylinder that produced greater drag. Therefore, this research was conducted to reduce the drag force on the corner with disturbance dimension variation. This research was carried out numerically using a FLUENT 6.3.26 CFD software in 2D unsteady viscous-RANS models Turbulence Model-Shear-Stress Transport (SST) k-ω in a narrow channel. The geometry is simulated in a circular cylinder as the main body and the square cylinder as a disturbance body being placed in front of the main body by 0.16 s/D ratio. Dimensions of disturbance body varied at (s) 0,1; 0,2; 0,3; 0,4 dan 0,5 mm with a gap (δ=0,4mm). Reynolds number based on the diameter of the cylinder, ie ReD 2,32x104. The simulation results show that the transition flow on shifting 60º SDB angle for all SDB dimensional variations do not produce turbulent. The best of drag force reduction in this configuration occurs on a cylinder at 0.2 mm disturbance dimensions is 48%.
Experimental Study of Heat Pipe Solar Collector for Energy Supply to Heat Pump Wahyu, Dian
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Publisher : Kopertis Wilayah X

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Abstract

Heat pipe solar collectors with heat absorber with a size of 1.13 m x 2 m x 0.12 m with 1.87 m2 aperture area has been created and tested to produce hot water which will be used for energy supply to heat pump. Heat pipes are made using water as the heat carrier medium and use stainless steel mesh wick 100 as a tool that helps accelerate the flow of condensate inside the heat pipe. Tests conducted heat pipe heat pipe first before selected and assembled into a solar water heating collectors. Testing is done by using heat pipes 1.000 mL 100 oC temperature hot water as a heat source and a heat pipe evaporator also tested by direct solar radiation. The tests are done to see the response speed (τ) heat pipe in heat transfer. Filling ratio obtained from testing the best heat pipe is 10%. Testing of solar collector with heat pipe absorber has been conducted during the month of June 2013 in the laboratory of solar Institut Teknologi Bandung (ITB) using the standard American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE 93-2003). The efficiency of solar water heating collectors is strongly influenced by solar irradiance and the temperature difference between incoming fluid collector with the environment (Tfi-Ta). The test results showed the highest efficiency of 35.8% is obtained when the temperature difference between incoming fluid and ambient temperature is close to zero. To get hot water at a flow rate of at least 50oC 0,25 L / min, the necessary irradiance of 750 W / m2. Generally, during the trial obtained water output temperature solar heating collectors from 8:30 - 9: 40 pm and 15: 40 - 17: 30 pm is below 50 °C, while at 9:40 - 15: 40 obtained collector output water temperatures above 50 ° C , Thus, it can be concluded that the heat pipe solar collectors are designed can be used to replace the evacuated tube collector in supplying heat for the heat pump. An advantage of using heat pipe solar collectors tend to be more economical and can be domestically produced.
Feasibility Test of Refill Drinking Water in Batam Hazimah, Hazimah; Triwuri, Nurlinda Ayu
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Publisher : Kopertis Wilayah X

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Abstract

According to the Regulation of the Minister of Health No.492 Year 2010, drinking water quality is assessed from the chemistry parameters, one of them is aluminium (Al), iron (Fe), kloride (Cl) and copper (Cu), it should meet the standards that have been defined. The aim of this research is to find out the quality of refill drinking water in Batam with indicator aluminium (Al), iron (Fe), kloride (Cl) and copper (Cu). The research was conducted in the laboratory of PT. Sucofindo Batam, Riau Islands-Indonesia. The type of this research is laboratory descriptive. Data was obtained by using simple randomized sampling technique. Aluminium (Al), iron (Fe), cloride (Cl) and copper (Cu) research of drinking water used Standart Methods for Water and Waste Water American Public Health Assosiation, 22nd eddition 201. The result of this research showed that all six samples meet the qualification of the Regulation of the Minister of Health No.492 Year 2010 by chemistry parameters of Aluminium (Al), iron (Fe), cloride (Cl) and copper (Cu).
Interactive Multimedia CD Design Chemistry Lesson In Concept Training Material and amendment For Class X Vocational High School (SMK) Wijaya, Indra; Sefriani, Rini
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Publisher : Kopertis Wilayah X

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Abstract

This research aims to create  Multimedia Interactive CD that helps for students in the learning process, especially in learning Chemistry. This research was conducted in subjects with material chemistry concept of matter and its changes. This research is R & D (research and development). Multimedia  interkatif CD later will be tested to the students of class X Vocational High School .Instrumen used in collecting data in the form questionnaire, with Likert scale with respondents Vocational High School students from several schools. The data were analyzed using Microsoft Excel 2007. Based on the research that has been done, the obtained to display multimedia interactive CD rhitung value = 0.49 and compared with r kritis, = 0.3 the display of multimedia interactive CD declared valid, and for ease of navigation CD Multimedia interactive rhitung value = 0.48 and compared with rkritis, = 0.3  the ease of navigation interactive multimedia CD declared valid, and for aspects of Multimedia rhitung value = 0.58 and compared with rkritis, = 0.3 and Multimedia aspects declared valid,for the media  learning the value of rhitung = 0.50 and compared with rkritis, = 0.3 and the media to learn declared valid, thus Multimedia interktif CD Chemistry is feasible to be used as an additional medium / aids in teaching Chemistry for class X Vocational High School.
Estimation of the Manufacturing Product Complexity Based on the Product Information on Turning Process Product Romiyadi, Romiyadi; Azriadi, Emon
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Publisher : Kopertis Wilayah X

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Abstract

Product complexity index was an indicator of a manufacturing product that describes the products are designed and manufactured with a level of complexity. In this study, assesment of product complexity was conducted on milling processing product. Assesment conducted on the variable of turning processing product complexity based on features of the products and specifications of materials, shapes, geometry, tolerance, general surface finish and hardness. ElMaraghy introduced the method in this study and Urbanic based on information product were absolute quantity information, diversity of information, and content of product information. The results of product complexity assesment indicated that the product of original External Thread Bearing Housing had product complexity index of 6.28. While the results of product complexity assesment indicated that, the product of redesign External Thread Bearing Housing had product complexity index of 8.96.
Hydrology Analysis and Rainwater Harversting Effectiveness as an Alternative to Face Water Crisis in Bantan Tua Village Bengkalis District-Riau Cahyaningsih, Catur
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Publisher : Kopertis Wilayah X

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Abstract

Home residence around Bantan Tua Village, Batan Subdistrict, Bengkalis District, Riau Province, have a tub for Rain Water Harvesting (PPAH), to collect and store water when rain come for cooking and drinking purposes. PPAH tub at home residence has a variety of sizes. There is a tub that size is too large and too small. PPAH tub volume size must be adapted to the rainfall data to be able need supply for community. The fundamental problem is that most people do not know the effective size PPAH tub to accommodate the abundance of rainfall harvesting because limited rainfall data information and the using of formulas hydrology calculation. Based on rainfall data in Bengkalis 2014, the average runoff of rain water per month is 141.5 mm. Houses the size of 8 x 10 m, which is the dominant type of house in Bengkalis, the ideal amount of rainwater collected in each house is 1920 m2 / month. While water demand required by equating averaged, the house is a consisting of four members is 3600m3 / month. End of month, volume of tub has deficiency is 1600m3. Recommendation of effective PPAH tube is 1500 liters, based on data rainwater runoff per month.
Design and Manufacturing of LPG Gas Leak Detector in The Kitchen Arif, Muhammad
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Publisher : Kopertis Wilayah X

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Abstract

How to detect a gas leak is by using an early detection to prevent the occurrence of unwanted conditions. Detector as a gas leak detector can be applied to reduce the incidence of unwanted conditions such as explosion and fire that can result material losses, even death. The most common cause of the leak gas cylinders is corrosion in the gas cylinder, hose and its regulator. However, another cause is forced modification that can create accessories damage such as hose, valve, and regulator. Based on above conditions, additional effort is needed to maintain fire accident due to gas leak from cooking device that uses gas to cook in the kitchen or housing residents. Therefore, there was an action to design a leak gas detector ergonomically, effectively, and efficiently. From its function, detector can react 6 seconds if the position is above of regulator, and 9 seconds if placed on the above of stove at 35 cm distances. After the designed detector is completed and also tested, then detector was able to detect the occurrence of leak gas and it is useful to be used by the public.
Ground Water Quality Analysis in the Coastal of Bengkalis City Using Geochemistry Approach Mairizki, Fitri; Cahyaningsih, Catur
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Publisher : Kopertis Wilayah X

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Abstract

Disproportion between supply and demand of clean water is a complex problem in water management, especially in the coastal of Bengkalis city. Water scarcity occurs in different parts of the region accompanied by bad quality of ground water. Therefore, it is necessary to study the potential of groundwater as clean water and drinking water using geochemistry approach. Groundwater samples obtained from wells and wells drilled in Bantan Tua village, Bengkalis district, Riau. Most groundwater samples did not meet the requirements of clean water and drinking water based on Permenkes 492/Menkes/Per/IV/2010 in terms of physical and chemical parameters with temperatures ranging from 26-29oC, turbidity 5- >100 NTU, TDS 0-30,5 mg/L, pH 4,05–7,40, Cd 0,001-0,011 mg/L, Mn 0,020–1,775 mg/L, Fe 0,291–17,100 mg/L, Cu 0,000–0,095 mg/L, Cr < 0,05 mg/L, hardness 19,669–560,184 mg/L, SO42- < 25 mg/L, NO3- 17,96–220,6 mg/L, NH4+ 0,00–3,21 mg/L, F- < 0,10– 0,13 mg/L dan Cl- 0,2–71,8 mg/ L. The  groundwater in this study was dominated by non carbonate in form of  Na+K indicates that the facies of groundwater aquifers was influenced by seawater with clay lithology and illite mineralogy. The genesis of origin rocks derived from weathering igneous rock which rich in plagioclase and feldspar minerals.
The Development and Verification of Two Time Domain Identification Algorithms Using Scientific Python Ecosystem – The Free Vibration Problems Adriyan, Adriyan
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Publisher : Kopertis Wilayah X

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Abstract

This research presented a study for verification the performance and the effectivity of identification program for modal parameters identification. The identification program was written in scientific python ecosystem by implementing Ibrahim Time Domain (ITD) and Eigensystem Realization Algorithm (ERA) method. A cantilever beam with three additional lumped masses was used as the structure under test (SUT). The SUT was modeled to produce numerically simulated responses and tested to obtain experimentally recorded responses. Especially in the first stage, the numerically simulated response was corrupted with white noise with a signal to noise ratio of 12.04 dB to imitate real vibration responses. Then, the performance was marked by capabilities to identify consecutive stable modes for every increment of model order in both stages. Both time domain method presented well those capabilities in the identification process. Hence, it can be concluded that the program can identify well even in high noise contamination in the responses and real vibration data using laboratory test scale.

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