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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 7 Documents

Search results for , issue "Vol 13, No 1 (2019)" : 7 Documents clear

An Extensive Study of Thermo-electric Effect Mukul Chandra Das
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

In well known thermo-electric effect (i.e. in thermo-couples generally used in college laboratories) the maximum temperature difference between the junctions approaches 100oC resulting in small magnitude of the current and potential difference produced. These are in the micro range. To have higher currents and potential differences a different type of experiment is to be performed.In this work an experiment has been proposed where thermo-electric effect is observed more prominently for different temperatures of a hotter conductor while keeping another conductor fixed at lower temperature (generally the room temperature) making the temperature difference too high resulting in the current and potential difference to increase. Experiment has also been performed to increase the thermo-electric power by joining a number of thermo-couples.

Synthesis, Structural and Optical studies of SnO2 nanoparticles by Chemical precipitation method N Ganeshan S
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

Tin Oxide (SnO2) nanoparticles have been prepared by chemical precipitation method. The prepared sample was characterized by X-ray diffraction, SEM with EDAX, UV- Vis absorption and Photoluminescence. From the X-ray diffraction patterns showed that the formation of pure SnO2 with their average crystallite size are 17 nm. The crystalline product shows good morphology with meragre agglomeration by SEM images. Elemental compositions of SnO2 nanoparticles were determined by EDX Spectroscopy. UV – Visible spectrum reveals that the transparency of nanoparticles over entire range. The Photoluminescence spectrum for the prepared samples was also recorded.

Design of Filing System for police investigation report on the Forensic Document Unit of POLRI Forensic Laboratory Center Rochani Ani; Saeful Lukman; Bheta Agus Wardijono
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

The Archiving system of Official Report of Inspection that runs on the Forensic Document Unit of POLRI Forensic Laboratory is particularly inefficient and effective as it still implements conventional filing systems. The recording of Official Report Documents is only in the general ledger. Based on these problems, the authors formulated "How to create an archiving information system that is expected to accelerate the process of searching, packing, storing records in a safe place". The objective of the research is to produce Information Archiving Information Archive Information System on Forensic Document Forensic Unit of POLRI Forensic Laboratory Center for better, faster, accurate and efficient.With this system archive data processing archives more centralized and can help search and printing files / data quickly without having to search the archives are stacked, can avoid the loss of original archives. This is due to a scan of the original file that can be seen on this system. Based on the results of the test show that the system built successfully build the police investigation report Archive database. Thus it can be concluded that Official Report of Inspection Archiving System has been successful and ready to be implemented.

Broad inhibition of transmission frequency in multilayered dielectric one dimensional photonic crystal nanostructure VINOD CHACKO; Sonia Bansal; Aurangzeb khurram Hafiz
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

We report the omnidirectional reflection (ODR) in one dimensional photonic crystal (PC) structure consisting of alternate layers of Cryolite (Na3AlF6) as material of low refractive index and Germanium (Ge) as material of high refractive index. The effects of the thickness of layers and incidence angles on the spectral reflectance have been investigated using transfer matrix method (TMM). The proposed structure gives broad inhibition of transmission frequencies within a wide range of wavelengths in the visible-near IR region (600 nm- 850 nm) which can be tuned according to the design parameters. We observe that cryolite based photonic crystal structure can be used as a good candidate for wavelength filter or broad reflector in the near infrared spectrum which is very useful in many imaging sensors in the field of optical technology

The Correlation between Total Ischemic Time with Length of Hospitalization : a Single Centre Report Eriawan Agung Nugroho; Muhamad Azwin Kamar; Dila Junita
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

Kidney transplantation is recognized as an advanced modern therapeutic modality for patients with end stage renal failure. Cold Ischemic Time (CIT) has been found as an important independent risk factor for delay graft function (DGF) in kidney transplantation. Recent studies suggested that prolonged Warm Ischemic Time (WIT) may decrease graft’s survival in living kidney transplantation donor.This study aimed to evaluate the total ischemic time during recipient surgery and accessed its contribution for hospitalization time in kidney transplantation patients.This is an observational, cross sectional study. The datawas collected from medical record of patient who underwent kidney transplantation from 2014 until December 2018at Kariadi General Hospital Semarang. There were 28 patients, 18 were maleand 10 were female.Total ischemic time was compared with length of hospitalization. Data was analyzed with Spearman test in SPSS version 23. The study showed that total ischemic time was significantly correlated with hospitalization time (p < 0.001). However, donor’s age did not affect prolonged total ischemic time with p = 0.673, which is not significant (significant if p value < 0.05). In conclusion, total ischemic time has a significant correlation with hospitalization time. In contrary, no significant correlation between donor’s age and prolonged total ischemic time.

Source apportionment of PM2.5 bound Polycyclic Aromatic Hydrocarbons from a Tricity in the foothills of Himalayas in Northern India Sandeep Garg; Anita rajor; Amit Dhir
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

This study highlights variability in mass levels and source identification of PM2.5 bound polycyclic aromatic hydrocarbons (PAHs) in the tricity of Chandigarh, Mohali and Panchkula in India. The samples of PM2.5 werecollected from industrial and residential and sensitive receptor sites during summer (April-May 2015) and winter (December 2015-January 2016) season. Sampling was done using medium volume sampler and chemical analysis was done using gas-chromatography technique. The average mass levels of PM2.5 varied from 31 to 91 µg m-3 exceeding to NAAQ standard of 60µg m-3 and total PAHs varied from 5.76 to 75.62 ngm-3 with a seasonal variability as higher in winter than in summer season. The positive correlation between PM2.5 & TPAHs suggested similarity in source and origin. Diagnostic ratio and principal components analysis suggested vehicular emissions, coal combustion, wood and biomass burning as the main source of PAHs in the study area for potential health hazards.

UTILIZATION OF GENCIL MOBILE APPLICATION IN IMPLEMENTING SMART CITY IN PONTIANAK Hidana Nur Jannah
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

Gencil is a mobile application developed in Pontianak to support the implementation of smart city. The aims of this study are; 1)describing the Gencil mobile application, 2)identifying the utilization of Gencil mobile application, 3)identifying the constraining factors in the development of Gencil mobile application in Pontianak. Primary data was obtained through in-depth interviews and questionnaires. The results show that Gencil mobile application consists of six features. The food price feature becomes the most popular one. Constraining factors for the development of Gencil mobile application are the lack of community participation and the inadequate infrastructure for the application’s development

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