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International Journal of Science and Engineering (IJSE)
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
The scope of journal covers all area in the application on chemical, physical, mathematical, biological, agricultural, corrossion, and computer science to solve the engineering problems.
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Articles 20 Documents
Search results for , issue " Vol 5, No 2 (2013)" : 20 Documents clear
Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines Sarkar, Alok; Mandal, Arup Kumar; Sinha, O. P.
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (577.599 KB) | DOI: 10.12777/ijse.5.2.9-14

Abstract

The present study deals with the utilization of fines generated from comminution process (crushing, grinding and screening) of the Run of Mines into value added products i.e. fluxed iron ore pellets. The study comprises to understand the physical and mechanical behavior of five distinguished chemical compositions of green and dried iron ore pellets with respect to a typical Mini Blast furnace (MBF) burden data and furnace operating parameter. The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at 100% high ash coke (avg. ash content= 29%). The crushing strength and drop number of various green pellets were measured. Green Crushing Strength was decreased with increasing lime fines. The addition of lime fines as a burnt lime, which has acicular structure creates less plasticity and brittle like fracture occurred. Due to formation of hard CaCO3 layer on the surface, after increasing lime contain crushing strength was increased in the air and oven dry pellets with respect to acid pellet (0% lime fines addition). [How to cite this article: Sarkar, A., Mandal, A.K., and Sinha, O.P. (2013) Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines. International Journal of Science and Engineering, 5(2),9-14. Doi: 10.12777/ijse.5.2.9-14] 
Correlation of Vapor-Liquid Equilibria for Commonly Used Binary Systems in Supercritical Fluid Extraction Processes Atashrouz, Saeid; Mirshekar, Hamed; Bagheri, Hamid
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (698.475 KB) | DOI: 10.12777/ijse.5.2.1-8

Abstract

In this paper, a comprehensive mathematical model is developed based on the Feed-ForwardBack Propagation Artificial Neural Network (FFBP-ANN). The model is employed for thecalculation of Vapor Liquid Equilibria (VLE) of four CO2-containing binary mixtures. Themixtures include CO2 - Tertpentanol was investigated at the temperature range from 313.14 to343.15 K. The following mixtures including CO2 - Isobutanol at 313.2 to 353.2 K, CO2 - methylacetate at 308.15 to 328.15 K and CO2 - diisopropyl ether at 265.15 to 333.15 K wereinvestigated as well. The related experimental data of open literature have been used to constructthe model. The results confirm that there is a reasonable conformity between the predicted valuesand the experimental data. Additionally, the ability of the ANN model is examined by comparison with the conventional thermodynamic models and ANN model predicted VLE datawith more accuracy.
Weighted Local Active Pixel Pattern (WLAPP) for Face Recognition in Parallel Computation Environment Rao, Gundavarapu Mallikarjuna
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1905.722 KB) | DOI: 10.12777/ijse.5.2.41-46

Abstract

Abstract  - The availability of multi-core technology resulted totally new computational era. Researchers are keen to explore available potential in state of art-machines for breaking the bearer imposed by serial computation. Face Recognition is one of the challenging applications on so ever computational environment. The main difficulty of traditional Face Recognition algorithms is lack of the scalability. In this paper Weighted Local Active Pixel Pattern (WLAPP), a new scalable Face Recognition Algorithm suitable for parallel environment is proposed.  Local Active Pixel Pattern (LAPP) is found to be simple and computational inexpensive compare to Local Binary Patterns (LBP). WLAPP is developed based on concept of LAPP. The experimentation is performed on FG-Net Aging Database with deliberately introduced 20% distortion and the results are encouraging. Keywords — Active pixels, Face Recognition, Local Binary Pattern (LBP), Local Active Pixel Pattern (LAPP), Pattern computing, parallel workers, template, weight computation.  
Pitting Corrosion of Ni3(Si,Ti) Intermetallic Compound at Various Chloride Concentrations Priyotomo, Gadang
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.303 KB) | DOI: 10.12777/ijse.0.0.xx

Abstract

The pitting corrosion of Ni3(Si,Ti) intermetallic compound was investigated as function of chloride concentration by using electrochemical method and scanning electron microscope in sodium chloride solutions at 293 K.  In addition, the pitting corrosion of type C276 alloy was also studied under the same experimental condition for comparison.  The pitting potential obtained for the intermetallic compound decreased with increasing chloride concentration.  The specific pitting potential and pitting potential of Ni3(Si,Ti) were lower than those of C276 alloy, which means that the pitting corrosion resistance of C276 alloy was higher than that of Ni3(Si,Ti).
Zinc Supplementation Dosage Variations to Metallothionein Protein Level of Rattus Norvegicus Santosa, Budi; Wahyu Subagyo, Hertanto; S, Lisyani; Rya Sunoko, Henna
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.679 KB) | DOI: 10.12777/ijse.0.0.xx

Abstract

Zinc is an essential trace element involving in the activity of more than 300 enzymes and proteins of human body. One important role of zinc is to improve metallothionein protein binding heavy metals and functioning as heavy metal detoxification facilities. This research discusses the effect of zinc supplement  on the  improvement of metallothionein protein level. The in vivo test involving 28 rats categorized in 4 groups was performed. The experiments used randomized post test control group design. The 3 groups were daily supplemented by zinc in th concentration of  0.2 mg, 0.4 mg, and 0.8 mg. Whereas, the last group was let without zinc treatment. As an indicator the metallothionein protein level was checked after three weeks. The data was then evaluated by Anova an Bonferroni test in order to know the signicant of protein level difference among the groups. The result showed that the average of metallothionein protein level improved by increasing zinc suppplement with the 0.95 ±0.20; 1.28 ±0.19; 1.39 ±0.09; 1.91 ±0.3 ng/ml metallothionein per 0, 0,2, 0,4, 0,8.mg zinc added. Based on the ANOVA and Bonferroni test,  indicated that the improvement was significant as shown with p value  of 0.00
The Determinant Factors of Creative Economy Craftsmen Sustainability in South Sulawesi Province Ibrahim, Helda; Amanah, Siti; S. Asngari, Pang.; Purnaningsih, Ninuk
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (634.791 KB) | DOI: 10.12777/ijse.0.0.xx

Abstract

Creative economy craftsmen have big contribution to regional income and able to sustain in crisis. It can be seen on the average of Gross Domestic Product has employed 5.4 million in average for 2002-2009 with participation level of 5.8%. Therefore, a strategic sustainability is needed especially for the determinant factors of sustainability related to creative economy craftsmen. This research aims to observe the determinant factors of sustainability of creative economy craftsmen in Wajo and Bulukumba Regencies in South Sulawesi Province. Sample for the research was 215 creative economy craftsmen. Data collection is conducted on January to April 2012 consists of primary and secondary data. Research method was using prospective analysis to determine important factors to the sustainability of creative economy craftsmen that predict future alternatives. Result from Rap-UEK simulation for the composite of five dimensions showed a less sustainable status of 48.97%. Research results showed that there are six dominant or main factors in determining business sustainability of creative economy craftsmen, one place sale, coordination with the government and private sectors, capital source, increase in the product of creative economy business, business field and product development Doi: 10.12777/ijse.5.2.18-24 [How to cite this article: Ibrahim, H., Amanah, S., Asngari, P.S., and Purnaningsih, N. (2013). The Determinant Factors of Creative Economy Craftsmen Sustainability in South Sulawesi Province. International Journal of Science and Engineering, 5(2),18-24. Doi: 10.12777/ijse.5.2.18-24]
Study of Biometric Identification Method Based on Naked Footprint Rafiu King, Raji; Xiaopeng, Wang
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (702.989 KB) | DOI: 10.12777/ijse.0.0.xx

Abstract

The scale of deployment of biometric identity-verification systems has recently seen an enormous increase owing to the need for more secure and reliable way of identifying people. Footprint identification which can be defined as the measurement of footprint features for recognizing the identity of a user has surfaced recently. This study is based on a biometric personal identification method using static footprint features viz. friction ridge / texture and foot shape / silhouette. To begin with, naked footprints of users are captured; images then undergo pre processing followed by the extraction of two features; shape using Gradient Vector Flow (GVF) snake model and minutiae extraction respectively. Matching is then effected based on these two features followed by a fusion of these two results for either a reject or accept decision. Our shape matching feature is based on cosine similarity while the texture one is based on miniature score matching. The results from our research establish that the naked footprint is a credible biometric feature as two barefoot impressions of an individual match perfectly while that of two different persons shows a great deal of dissimilarity. Doi: 10.12777/ijse.5.2.29-35 How to cite this article: King, R.R. and Xiaopeng, W. (2013). Study of Biometric Identification Method Based on Naked Footprint . International Journal of Science and Engineering, 5(2),18-24. Doi: 10.12777/ijse.5.2.29-35]
Effect of Concentration of Catalyst (BF3-Diethyl Etherate) on Synthesis of Polyester From Palm Fatty Acid Distillate (PFAD) Manurung, Renita; Tanjung, Ahmad Rozi; Ayuningrum, Ida
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.694 KB) | DOI: 10.12777/ijse.5.2.36-40

Abstract

Palm Fatty Acid Distillate (PFAD) can be used as raw material for synthesis polyester. The aim of this research is to synthesis of polyester and to determine the effect of concentration of catalyst on polymerization methyl ester PFAD. The esterification stage was done at temperature 70oC, reaction time 120 minute, reactant ratio 1:8 (PFAD: methanol), concentration of catalyst (H2SO4) 1% (w/w) PFAD; polymerization stage was done at temperature 126-132°C, polymerization reaction time 4 hours; variation of concentration of catalyst (BF3-diethyl etherate) 0%, 6.9%, 9.2%, 11.5% (w/w) methyl ester; and polyesterification stage was done at temperature 175-200 oC, reactant ratios (w/w) 1:1 (polymerized ME : ethylene glycol), reaction time 4 hours and all of stage was stirred at 150 rpm. The results showed, in the esterification stage was obtained methyl ester with iodine value 77.29 g I2/100 g, viscosity 6.90 cP, density 859.91 kg/m3 and analysis by using GC-MS showed that the purity of methyl ester was 82.23% and molecular weight 267.97 g/mol. Decreasing in iodine value from 77.29 I2 g/100 g to 74.97-59.99 g I2/100 g indicated that the polymerization process had taken place. In polyesterification stage was obtained light brown colored liquid for concentration of catalyst 0%; viscous, light brown colored liquid for concentration of catalyst 6.9%; and gel polyester, viscous, dark brown colored solid at room temperature for concentration of catalyst 9.2% and 11.5% with acid value from 8.19 to 26.14 mg KOH/g, viscosity from 0.07 to 15.2 P, and molecular weight 288.81 to 1522.07 g/mol which is more suitable for applications of modified polyester. Analysis by using GC showed that the purity of polyester is equal to 65.49%. Keywords— polyester, palm fatty acid distillate, polymerizationconcentration of catalyst,biodegradable polymer
UTILIZATION OF AGARWOOD DISTILLATION WASTE IN OILWELL CEMENT AND ITS EFFECT ON FREE WATER AND POROSITY Sauki, Arina; Md. Shahid, Muhammad Hazman; Ku Hamid, Ku Halim; Azizi, Azlinda; Jamaludin, Siti Khatijah; Tengku Mohd, Tengku Amran; Alias, Nur Hashimah
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.506 KB) | DOI: 10.12777/ijse.5.2.61-65

Abstract

The intent of this research is to utilize the waste produced by distillation process of Agarwood oil and convert it into a profitable oilwell cement additive. Common problem during oilwell cementing is free wáter separation. This problem could weaken cement at the top, gas migration problem and non uniform density of cement slurry that are even worst in cementing deviated well. Another concern on cementing design is the porosity of the hardened cement. If the cement is too porous, it can lead to gas migration and casing corrosion. All tests were conducted according to API Specification-10B. Free water test was determined at different concentrations of Agarwood Waste Additive (AWA), different inclination angles and different temperatures. Based on the findings, it was observed that zero free water was produced when 2% BWOC of AWA was used at all angles. The findings also revealed that AWA can maintain good thermal stability as it could maintain zero free water at increased temperature up to 60˚C.  The porosity of AWA cement was comparable with standard API neat cement as the porosity did not differ much at 2% BWOC of AWA. Therefore, it can be concluded that the AWA is suitable to  be used as an additive in oil well cement (OWC)  with 2% BWOC is taken as the optimum concentration.
Turbidity Measurement Using An Optical Tomography System Ibrahim, Sallehuddin Bin
International Journal of Science and Engineering (IJSE) Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.549 KB) | DOI: 10.12777/ijse.5.2.66-72

Abstract

Turbidity is used to describe water quality and it can be caused by the presence of suspended particles and organic matter such as algae, clay and silt. The measurement of turbidity level of water is vital to domestic water supplies since it is related to public health and water treatment process. This paper presents an investigation on an optical tomography system to estimate the turbidity level in a sample of water. The optical sensors consist of infrared light-emitting diodes (LED) as transmitters and photodiodes as the receivers where the projections of the sensors are designed in fan beam mode. The system was tested using a vertical flow pipe. The Independent Component Analysis (ICA) method was used to display the concentration profile. Results obtained proved that the technique can provide the concentration profile representing the turbidity level of water.

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