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Irza Sukmana
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Faculty of Engineering, Universitas Lampung. Jl. Soemantri Brojonegoro No.1 Bandar Lampung – Indonesia. http://eng.unila.ac.id
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INDONESIA
Journal of Engineering and Scientific Research (JESR)
Published by Universitas Lampung
ISSN : 26850338     EISSN : 26851695     DOI : https://doi.org/10.23960/jesr.v4i1.78
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering
The focus and scopes of JESR is on but not limited to Mechanical Engineering and Material Sciences, Chemical and Environmental, Industrial and Manufacturing Engineering, Computer and Information Technology, Electrical and Telecommunication, Civil and Geodetic Engineering, Architecture and Urban Planning, Geophysical Science and Engineering, and other multidisciplinary research. The main criteria for publication are including the originality, scientific quality and interest to the aim and focus. JESR publishes twice a year for June and December editions. We welcome for publication collaborations with organizer of International Seminars, Conferences and Symposiums around the world. We are encouraging authors to submit their manuscript through our online system.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 90 Documents
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FRACTAL HILBERT SENSOR TO DETECT PARTIAL DISCHARGE ON TRANSFORMER Sinaga, H. B. H. Sitorus, D. Permata, N. Soedjarwanto, Herman Halomoan
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.31

Abstract

The design of fractal Hilbert sensor is presented in this paper. The sensor is intended to detect partial discharge (PD) in transformer insulation. The fractal Hilbert sensor designed using 4 order fractal and etching on single layer PCB board. The Hilbert fractal type is chosen as this type of sensor can be built on smaller area compare to other types. The sensor overall dimension is limited to 5x5 cm as it is proposed to be use to detect the PD presence in transformer. The sensor sensitivity is tested using a closed type TEM cell. After the sensitivity of the sensor is tested the sensor then applied to detect the PD signals emitted by void PD defect model. The results show the sensor has sensitivity as high as 10 dB. The sensor also has capability to detect the PD signals generated by the PD defect source. The waveforms captured by the sensor show the sensors can capture high frequency pulse generated by the PD source.  Keywords: Partial Discharge (PD), Fractal Hilbert Sensor UHF, Sensor Sensitivity
SOCIAL CAPITAL, ENTREPRENEURSHIP AND RURAL DEVELOPMENT Prayitno, D S Noor, ART Hidayat, Gunawan
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.29

Abstract

Arjowilangun Village is one of the most significant areas of origination in the Malang Regency for Indonesian migrant workers aiming to work overseas. The remittance sent by Indonesian migrant workers can be utilised to support the Desmigrative program, namely by establishing and developing entrepreneurship. The growth and development of entrepreneurship can be formed from the participation of the village community. Community participation in developing independent entrepreneurship can in turn boost village development. In line with Indonesian culture, rural communities still put forward kinship, trust, mutual cooperation, networking and high social norms (social capital component). This research aims to identify the social capital of retired Indonesian migrant workers and their decision to start business entrepreneurship. The results of the Social Network Analysis (SNA) as identified through three approaches: rate of participation, density and centrality showed that 14 respondents had the potential to be key figures in spreading information to increase community participation in village development. While the results of the correlation analysis indicate that the decision to start a business were influenced by the high value of their social capital, higher social capital can encourage the community to become entrepreneurs, enabling them to have a positive influence on village development.  Keywords: Migrant worker, Social Capital, Entrepreneurship, Rural Development
BASE FLOW INDEX OF WAY SEPUTIH RIVER AT BUYUT UDIK Kusumastuti, E.P. Wahono, A. Yusuf, Dyah Indriana
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.27

Abstract

One of river flow components considered in watershed management is baseflow, the main contributor to the river flow during dry season. Ratio between baseflow to total flow is called Base Flow Index (BFI). In fact, BFI can be used as an indcator how good the catchment hydrology is. The purpose of this study is to analyze BFI of Way Seputih river at Hydrometry Station Buyut Udik. The method includes Recursive Digital Filter (RDF) method, which utilizes constant recession of hydrographs in displaying the ratio of baseflow from continuous discharge during periods when there is no direct runoff. Daily discharge data from Way Seputih river at Buyut Udik recorded from 1973 to 2006 is used. The result shows that yearly BFI values range from 0.142 to 0.487 and there is a decrease trend of yearly BFI over time. This result is confirmed by yearly average discharges which tend to decrease over time. These are effected by land cover degradation in Way Seputih catchment and  this should be a concern for authorities to improve land and water conservation in Way Seputih catchment so that river flow could be maintained throughout the year. Keywords: base flow index, baseflow, dry season 
"MESE" FUNDAMENTAL AS BEST HUMAN INTERIOR DESIGNER Andereas, P S
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.15

Abstract

Interior designer is a profession that is most responsible for the whole series of human activities on this earth. It is very important to place this concept because all important aspects of the human life in this space are fully in contact with the profession of interior designer. The education of interior designing is not just about creating ideas on how to create beauty and design spaces, but also about having responsibilities on various aspects in life. In the era of digitalization and where the components of life become increasingly complex, interior designers must be able to play the appropriate role to solve life?s problems. The developments in various aspects of ecology are also connected to interior designers, for example, recycling the waste must be one of interior designer?s goals. Experimenting, innovating, and becoming part of social life is the actual responsibility of interior designer, not living in the works of hedonism.
DESIGNING MODEL FOR TRUCK ASSIGNMENT PROBLEM IN BEEF DELIVERY USING DBSCAN ALGORITHM Paduloh, Taufik Djatna, Muslich, Sukardi, Paduloh
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.26

Abstract

In beef route delivery, many logistics companies have problems in making delivery plans correctly. Most logistics companies have a limited number of trucks, but there are shipping schedules, locations and volumes of demand is not fixed, in addition to returning products with various reasons that must be collected. Therefore the purpose of this study is to assign trucks to fulfill all beef delivery activities at a minimum cost. One reason for research on truck assignments in beef delivery is the high cost of shipping because it uses cold chains. This study uses the DBSCAN method to obtain density values based on customer distance to the central warehouse and the number of delivery requests, the data used in this study is the data of product delivery to customers for 6 months. Clustering research results using DBSCAN show the maximum values for epsilon 0.7 and Minpoints 2 are 3 clusters with 6 noises. with these results divided of trucks based on clusters is 2 trucks for the area of Banten, 7 trucks for the area of Jakarta, Bogor, and Bekasi, 2 trucks for Malang, and Surabaya. And 1 truck for the Bali area and noise or non-permanent delivery. Keywords: Truck assignment, DBSCAN, algorithm, beef delivery.
MATHEMATICAL MODEL OF IMPROVED REVERSE CHARGING OF WIRELESS INTERNET PRICING SCHEME IN SERVICING MULTIPLE QOS Puspita, Dewi Rakhmatia Nur, Ayu Luviyanti Tanjung, Joddie Silaen, Weny Herlina, Yunita, Fitri Maya
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.30

Abstract

This paper seeks to utilize the improved model of reverse charging scheme.  Reverse charging basically is defined as a capability of stored network that replaces the network used when the network is suddenly shut down. In this paper,  charging back on 3G and 4G network that is user automated platform, will change the access of 4G to 3G and on the contrary when platform conduct the hosting. This research was solved as a problem Mixed Integer Nonlinear Programming (MINLP) by LINGO 13.0. An optimal pricing scheme is applied to a local data server, including digilib traffic and mail traffic. The improved model of Reverse Charging is modified into 4 cases and formed by setting the base price (?) and service level (?). Based on the analysis that has been done, the results of this study indicate that the reverse charging model can be utilized Internet Service Provider (ISP) to maximize profits and provide quality services for the user if compared to previous model without reverse charging scheme. Keywords: improved model of revere charging scheme, MINLP, ISP, QoS, pricing scheme
A NOVEL POROUS MAGNESIUM PRODUCTION THROUGH POWDER METALLURGY TECHNIQUE USING WIRE-PIECES OF TITANIUM SPACE HOLDER FOR BONE SCAFFOLD MATERIALS Sukmana, Shirley Savetlana, Yanuar Burhanudin, Mahruri Arif Wicaksono, Hadi Nur, Irza
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.18

Abstract

Magnesium (Mg) and its alloys has a potential for the application for bone implant material as it?s biocompatibility and mechanical properties that fit to natural bone. Mechanical properties of magnesium alloy may close to human bone once it composed and produced in a specific production route. Mechanical properties of Mg alloy may close to cancelluos bone. Fabrication of porous magnesium for bone scaffold material aims to reduce the rigidity and strength of the material with density that can be adjusted to the original nature of the bone. It forms interconected porosity, has physical and mechanical properties similar to cancelluos bone. In this paper we describe the production and characterization of porous magnesium material for the potential application as bone scaffold through powder metallurgy technique with pieces of Titanium wire space holder. Mg containing titanium pieces then compacted and sintered before immersed in hydrofluoride acid solution to form a porous structure of magnesium. Density and porosity, micro vickers hardness, micro structure test was performed to prove the evidence of porous structure inside the Mg metal. This results finds a good cooperation and has a potential application for the fabrication of an inter-connected porous magnesium samples for cancellous bone implant.Keyword: Porous Magnesium, cancellous bone, implant, bone scaffold, titanium wire
ENERGY EFFICIENT HEALTHCARE MONITORING SYSTEM USING 5G TASK OFFLOADING Sigwele, Tshiamo; Naveed, Arjmand; Hu, Yim-Fun; Ali, Muhammad; Susanto, Misfa
Journal of Engineering and Scientific Research Vol 1, No 2 (2019)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v1i2.12

Abstract

Healthcare expenses can be significantly reduced, and lives saved by enabling the continuous monitoring of patient health remotely using Wireless Body Sensor Networks (WBSN). However, an energy efficient mobile gateway (e.g. 5G smartphone) is required which moves with the patient in real time to process the data from the bio sensors without depleting the battery. This paper proposes a 5G based healthcare cardiovascular disease REmote Monitoring system called 5GREM using Electrocardiogram (ECG) bio sensor as a BSN device. The aim is to monitor and analyse the patient?s heart rhythms and send emergency alerts during irregularities to the nearest caregivers, ambulance or physician to minimise heart attacks and heart failures while saving energy. Since ECG signal execution is computer intensive, requests from the ECG sensor are either executed locally on the gateway, offloaded to nearby mobile devices or to the 5G edge while considering the battery level, CPU level, transmission power, delays and task fail rate
The Potentials of Improving Mineral Source Additional Values in Lampung Province – A Prelimanary Study K Isnugroho; D C Birawidha; M Amin
Journal of Engineering and Scientific Research Vol. 1 No. 1 (2019)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.359 KB) | DOI: 10.23960/jesr.v1i1.2

Abstract

An initial research on non-metal mineral potential was conducted for stones in Lampung Province. Surveys were conducted to some districts/towns in Lampung to take sample materials. Non-metal mineral chemical composition content analysis of stones was conducted with X-RF method. Lampung had mineral potentials of feldspar, zeolite, kaolin, and basalt of 400,500,000 m3; 18,945,000 m3; 9,750,000 m3; 419,071,833 m3 respectively. These mineral source potentials were distributed in eight districts in Lampung. Processing was required to improve additional values for these mineral sources, including crushing, grinding, classifying, and concentration process. Concentration improvements were required for feldspar and kaolin minerals. Wet high intensity magnetic separator process followed by froth flotation process became solutions to reduce high oxide iron content. Feldspar and kaolin could be used for such industries of ceramic, glass, paper, and refractory. Meanwhile, the zeolite mineral from Lampung could be used for agriculture, plantation, and fishery. Basalt stone would have additional values when this was processed into cast basalt, fiber, and ceramic composite.
The Improvement of Paclitaxel Cytotoxicity using Nanocellulose based Nature Resources R Nahrowi; A Setiawan; Noviany Noviany; Irza Sukmana; Suripto Dwi Yuwono
Journal of Engineering and Scientific Research Vol. 1 No. 1 (2019)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.397 KB) | DOI: 10.23960/jesr.v1i1.3

Abstract

Paclitaxel is one of the cancer drugs that often used. These drug kills cancer cells by inhibiting mitotic cycle. The efficiency of paclitaxel is increased by the use of nanomaterials as a carrier of paclitaxel. Nanomaterials can enhance encapsulation efficiency, improve the drug release to the target cell following nanomaterial degradation, and improve local accumulation of drug in the cellthrough endocytosis receptor. Nanomaterial that often used forencapsulation of paclitaxel is a polymer derived from natural resources such as cellulose. The advantages of cellulose as a carrier of paclitaxel are nontoxic, biodegradable, and very abundant from various sources. One of the potential sources of cellulose for drug delivery system is cassava baggase.

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