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International Journal of Science and Engineering (IJSE)

ijse
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Published by Universitas Diponegoro

ISSN : - EISSN : - DOI : -

Core Subject : Engineering,

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.

Arjuna Subject : -

Articles 225 Documents

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The Autonomous Development Strategies of Micro and Small Entrepreneurs Through Coorporate Social Responsibility in Bogor District of West Java Faizal Maad; Sumardjo Sumardjo; Amiruddin Saleh; Pudji Muljono
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

The objective of this reseach were to: (1) analyze the level of autonomous of mikro and small entreprise (SMEs) entrepreneurs are empowered through Coorporate Social Responsibility (CSR); (2) analyze the dominant factors that influence autonomous of MSEs entrepreneurs are empowered through CSR; and (3) formulate an appropriate a strategy in developing autonomy of MSEs entrepreneurs through CSR. The reseach was conduct in the village built two companies running CSR in Bogor district involved 212 (SMEs) entrepreneurs which determined from population (450 SMEs entrepreneurs) by Solvin formula with level of error 5 % and drawn by cluster random sampling. Data collection was conducted from July to November 2013, and consisted the primary and secondary data. Data analysis was simulated by using structural equation model (SEM ). The results showed that the degree of autonomous MSEs entrepreneurs is low, its core was 36.89 out of 100.00. There are three strategies that must be done to develop of autonomous MSEs entrepreneurs through CSR, such as; (a) an increase the empowerment sustainable of MSEs entrepereneurs (b) improve the quality of the environment supporting MSEs and (c) an increase in intensity of empowerment for MSEs entrepreneurs.

Performance of indigenous chicken under intensive rearing with various litter materials M. Sulistyoningsih; Dwi Sunarti; Ejeng Suprijatna; I. Isroli
International Journal of Science and Engineering Vol 4, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

The purpose of the research was to obtain information regarding the performance of indigenous chicken under intensive rearing. The performance criteria were the increasing body abdominal weight, fat, rectal temperature, and the indigenous chicken’s mortality within the 5-week starter phase treatment. Research was conducted using 108 Day Old Chick (DOC). Data variance was analysed based on the split plot design (3 types of cage litter materials, 5 weeks of data collection, and 4 replications) for weight gain and abdominal fat parameters, and completely randomized design in time for rectal temperature. The result indicated a significant effect of different litter materials towards weight gain (P <0.01), the highest body weight was found on chicken treated with rice straw litter; there was no effect of litter material on abdominal fat percentage; there was a significant effect (P < 0.01) of age towards rectal temperature; and there were no interactions between litter material with age, on body weight gain, abdominal fat, and rectal temperature. Chickens under intensive rearing in rice straw floored cages were proven to have a mortality rate reduced by 3.7% in the starter phase.doi: http://dx.doi.org/10.12777/ijse.4.2.2013.52-56 [How to cite this article: Sulistyoningsih, M., Sunarti, D., Suprijatna, E., & Isroli, I. (2013). Performance of indigenous chicken under intensive rearing with various litter materials. INTERNATIONAL JOURNAL OF SCIENCE AND ENGINEERING, 4(2), 52-56; doi: http://dx.doi.org/10.12777/ijse.4.2.2013.52-56

Assessment of Water Quality Using Macrobenthos as Bioindicator and Its Application on Abundance-Biomass Comparison (ABC) Curves Suci Wulan Pawhestri; Jafron. W Hidayat; Sapto P Putro
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

Abstract -Activities of aquaculture and industry which is directly adjacent to an aquatic environment may potentially result in increasing organic matter and causes a decreasing quality of water in it. Macrobenthos can be used as an bioindicators to detect environmental disturbances occur in the aquatic environment. This study aims to determine the level of environmental disturbance in aquatic environments using macrobenthic assemblages and their application in the abundance and biomass curves and it was compared to the values of diversity and similarity indices. Locations of this study is polyculture ponds and coastal of PT. Kayu Lapis Indonesian located in Mororejo Village, Central Java. Based on the abundance of macrobenthos results shows that in coastal area of PT. Kayu Lapis Indonesia is dominated by Cirratulidae (60%) from Polychaeta while in polyculture ponds is dominated by Potamididae (58%). Based on the abundance and biomass comparison (ABC) curves, the polyculture ponds were categorized as undisturbed area, whereas the coastal area of PT. Kayu Lapis Indonesia was categorized as moderately polluted for the second sampling time. Whilst the values of diversity (H’) and similarity (e) indices indicated low for all stations, the ABC curve of macrobetnhic assemblages is effective to demonstrate the level of environmental disturbance occurs in aquatic environments.

An Enhanced Feedback-Base Downlink Packet Scheduling Algorithm for Mobile TV in WIMAX Networks Joseph Oyewale; Liu Xiao Juan
International Journal of Science and Engineering Vol 5, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

With high speed access network technology like WIMAX, there is the need for efficient management of radio resources where the throughput and Qos requirements for Multicasting Broadcasting Services (MBS) for example TV are to be met. An enhanced feedback-base downlink Packet scheduling algorithm that can be used in IEEE 802.16d/e networks for mobile TV “one way traffic”(MBS) is needed to support many users utilizing multiuser diversity of the broadband of WIMAX systems where a group of users(good/worst channels) share allocated resources (bandwidth). This paper proposes a WIMAX framework feedback-base (like a channel-awareness) downlink packet scheduling algorithm for Mobile TV traffics in IEEE806.16, in which network Physical Timing Slots (PSs) resource blocks are allocated in a dynamic way to mobile TV subscribers based on the Channel State information (CSI) feedback, and then considering users with worst channels with the aim of improving system throughput while system coverage is being guaranteed. The algorithm was examined by changing the PSs bandwidth allocation of the users and different number of users of a cell. Simulation results show our proposed algorithm performed better than other algorithms (blind algorithms) in terms of improvement in system throughput performance. Doi: 10.12777/ijse.5.1.55-62 [How to cite this article: Oyewale, J. and , Juan, L.X.. (2013). An Enhanced Feedback-Base Downlink Packet Scheduling Algorithm for Mobile TV in WIMAX Networks. International Journal of Science and Engineering, 5(1),55-62. Doi: 10.12777/ijse.5.1.55-62]

Non Oblivious Watermarking Technique for JPEG2000 Compressed images using Arnold Scrambling of Unequal Size Watermark Blocks Geeta Kasana; Kulbir Singh; Satvinder Singh Bhatia
International Journal of Science and Engineering Vol 9, No 1 (2015)
Publisher : Chemical Engineering Diponegoro University

In this paper, a watermarking technique for JPEG2000 compressed image is proposed. Scrambling of secret message is performed block-wise using Arnold Transform. Secret message is divided into non-overlapping blocks of unequal size and then Arnold transform is applied on each block and secret key is generated based on the periodicity of each block. Scrambled secret message is embedded into qualified significant wavelet coefficients of a cover image. After embedding the secret message into wavelet coefficients, the remaining processes of JPEG2000 standard are executed to compress the watermarked image at different compression rates. Scaling Factor (SF) is used to embed watermark into wavelet coefficients and the value of SF is stored into COM box of the code stream of JPEG2000 compressed image and this SF value and secret key are used to extract the embedded watermark on the receiver side. The performance of the proposed technique is robust to a variety of attacks like image cropping, salt and pepper noise, and rotation. Proposed technique is compared with the existing watermarking techniques for JPEG2000 compressed images to show its effectiveness.

Replacing Sugar by Date Syrup in Gaz and Investigation of Texture Properties Fateme Raiesi Ardali; Zahra Nilchian; Saeid Ahmadi; Mohammad Ali Shariati; Mina Akbarian
International Journal of Science and Engineering Vol 6, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Date Syrup is a natural sweetener that is suitable replacement for sugar in food stuffs formulation. In this Research Amounts of 25-100 percent of sugar in Gaz formulation were replaced with date syrup and to study effect of its use in product formulation, characteristics of texture, color and sensory analyse of treatments were investigated. Statistical analyse of data was also done by SPSS software and Dankan test. The results of this research showed that amount of used date syrup in formulation had a significant effect on color parameters (L*,a*,b*), texture characteristics and sensory analyse of samples. By increase of date syrup in Gaz formulation, samples texture became softer than control sample and yellowness and redness index of samples were increasedDoi: DOI: 10.12777/ijse.6.1.11-15 [How to cite this article: Shafiei, Z., Hojjatoleslami, M., Soha, S., and Shariati, M.A. 2014. The Influence of Malt Extraction Adding to UF Fresh Low Fat Cheese on Its Textural Properties. International Journal of Science and Engineering, 6(1):57-60. Doi: 10.12777/ijse.6.1.11-15

Potential Development of Liquid Smoke from Oil Palm Solid Waste as Biofungicides Asri Gani; Husni Husni; Akhmad Baihaqi; M. Faisal
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

This research investigated the potential utilization of solid waste from palm oil industry for liquid smoke production in Aceh Province, Indonesia. The liquid smoke can be applied as bio fungicides in agricultural field. Preliminary experiment on the use of liquid smoke as fungicide at Colletotrichum capsisi fungus which causes anthracnose disease on red pepper was also conducted. The survey on the existing potential/availability of palm oil mill in Aceh shows that there are 30 palm oil mills in eight districts with a total of production capacity 1020 ton/hour. Assuming that 10% of palm oil kernel shells are pyrolized into liquid smoke, Aceh province could produce about 23,868 ton of liquid smoke per year. The preliminary test result towards Colletotrichum capsisi fungus shows that the liquid smoke can be used as fungicides.

Diethyl Ether Production Process with Various Catalyst Type Widayat Widayat; Achmad Roesyadi; Muhammad Rachimoellah
International Journal of Science and Engineering Vol 4, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

Several H-zeolite and HZSM-5 catalysts was preparated and their characters have also been investigated. H-zeolit Catalyst was preparated from Natural Zeolite that obtained from Malang District and Gunung Kidul District. Diethyl ether was produced by Ethanol with concentration of 95%. This research use fixed bed reactor that 1 gram of catalyst as bed catalyst, atmospheric pressure and temperature 140oC as the operating condition. Ethanol vapor from vaporization tank was driven by 200 ml/min Nitrogen stream. The responds in this research is liquid product concentration; diethyl ether, ethanol, methanol and water concentration. The results showed that the largest ethanol conversion was produced by the use of 56.44% HZSM-5 and the largest yield of diethyl ether diethyl was produced by the use of alumina and H-zeolite catalyst. The larger ratio between natural zeolite with HCl solvent will produce the larger surface area of catalyst and ethanol conversion. The largest ethanol conversion was produced at reactan ratio 1:20. [Keywords: catalyst; ethanol conversion; dehydration process; yield of diethyl ether; natural zeolite].

Initial study of Nickel Electrolyte for EnFACE Process Tri Widayatno; Sudipta Roy
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

Nickel electrolyte for a micro-pattern transfer process without photolithography, EnFACE, has been developed. Previous work on copper deposition indicated that a conductivity of ~2.7 Sm-1 is required. Electrochemical parameters of electrolyte i.e. current density and overpotential are also crucial to govern a successful pattern replication. Therefore, the investigation focused on the measurement of physicochemical properties and electrochemical behaviour of the electrolyte at different nickel concentrations and complexing agents of chloride and sulfamate. Nickel electrolytes containing sulfamate, chloride and combined sulfamate-chloride with concentrations between 0.14 M and 0.3 M were investigated. Physicochemical properties i.e. pH and conductivity were measured to ensure if they were in the desired value. The electrochemical behaviour of the electrolytes was measured by polarisation experiments in a standard three-electrode cell. The working electrode was a copper disc (surface area of 0.196 cm2) and the counter electrode was platinum mesh. The potential was measured againts a saturated calomel reference electrode (SCE). The experiments were carried out at various scan rate and Rotating Disc Electrode (RDE) rotation speed to see the effect of scan rate and agitation. Based on the measured physicochemical properties, the electrolyte of 0.19 M nickel sulfamate was chosen for experimentation. Polarisation curve of agitated solution suggested that overall nickel electrodeposition reaction is controlled by a combination of kinetics and mass transfer. Reduction potential of nickel was in the range of -0.7 to -1.0 V. The corresponding current densities for nickel deposition were in the range of -0.1 to -1.5 mA cm-2.

Reservoir Operation to Minimize Sedimentation Dyah Ari Wulandari; Djoko Legono; Suseno Darsono
International Journal of Science and Engineering Vol 6, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

The Wonogiri Reservoir capacity decreases rapidly, caused by serious sedimentation problems. In 2007, JICA was proposed a sediment storage reservoir with a new spillway for the purpose of sediment flushing / sluicing from The Keduang River. Due to the change of reservoir storage and change of reservoir system, it requires a sustainable reservoir operation technique. This technique is aimed to minimize the deviation between the input and output of sediments. The main objective of this study is to explore the optimal Wonogiri reservoir operation by minimizing the sediment trap. The CSUDP incremental dynamic programming procedure is used for the model optimization. This new operating rules will also simulate a five years operation period, to show the effect of the implemented techniques. The result of the study are the newly developed reservoir operation system has many advantages when compared to the actual operation system and the disadvantage of this developed system is that the use is mainly designed for a wet hydrologic year, since its performance for the water supply is lower than the actual reservoir operations.Doi: 10.12777/ijse.6.1.16-23 [How to cite this article: Wulandari, D.A., Legono, D., and Darsono, S., 2014. Reservoir Operation to Minimize Sedimentation. International Journal of Science and Engineering, 5(2),61-65. Doi: 10.12777/ijse.6.1.16-23]

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