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Specta Journal of Technology

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Published by Institut Teknologi Kalimantan

ISSN : 25492713 EISSN : 26229099 DOI : https://doi.org/10.0610/specta.v2i3

Core Subject : Science, Social, Engineering,

Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science

SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 8 Documents

Search results for , issue "Vol. 2 No. 2 (2018): SPECTA Journal of Technology" : 8 Documents clear

Efek Kadmium terhadap profil DNA Bacillus cereus ATCC 9632 dan Pseudomonas aeruginosa WT pada Limbah Sintetik Elektroplating Umi Sholikah; Yulinah Trihadiningrum
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

The electroplating industry produces wastewater containing heavy metals. The high surface area of bacteria has the potency to reduce heavy metals content in wastewater since it has ability to absorb the metals. This study aims to find out the bacterial DNA profile after Cd bioremoval process using Bacillus cereus 9632 and Pseudomonas aeruginosa WT. Bacterial culture is applied in synthetic electroplating wastewater. Some Cd concentrations are used to perform Range Finding Test by bacterial culture. The study was conducted in a batch system for three days. The viability test was done by measuring the value of Optical Density and Total Plate Count, while bacterial DNA profile was analyzed by using electrophoresis. The cell viability of B.cereus ATCC 9632 and P.aeruginosa WT had the same pattern which is the higher concentration of Cd metals on cell bacteria surface, the lower cell bacteria viability. The DNA of the control bacteria has the difference between the size and number of bands.

Strategi Pengembangan Wisata Budaya di Kawasan Pecinaan Lasem Ariyaningsih Ariyaningsih
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Lasem is one of the sub-districts in Rembang District with historical and cultural heritage of Chinesse that have the potential for the development of cultural tourism as well as introducing to the wider community. The potential is still not utilized and developed optimally. This study was conducted to formulate strategies of cultural tourism development in accordance with the potential problems in the region.The analysis used is AHP(Analysis Hierarcy Process) combination SWOT analysis to determine strategy of development of Lasem Chinatown Area. In achieving the objectives of this study identified the strengths, weaknesses, opportunities, and threats that exist in the Lasem Pecinan Region. Then, the results of observationwere processed in the form of AHP analysis and generated the factor with the most important weight is the financing of development and attractiveness of the building. The next step, comparing the selected SWOT factor to produce the strategy component. The strategy was reprocessed using AHP to get priority of Lasem's area development strategy.The study found that the strategy of making tourism route, financing strategy for tourist attraction, the improvement of tourism accessibility, the development of tourism based on community empowerment, and the provision of supporting facilities in the tourism area. In addition, the first priority of strategy is the improvement of accessibility.

Pengujian Logam Berat pada Tanah Terkontaminasi Air Limbah PLTD di Petung, Kalimantan Timur Intan D W S Rini; Adrian Gunawan; A. Ibnu Arobi
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

PLTD (Pembangkit Listrik Tenaga Diesel) Petung or PLTD Girimukti is located in North Penajam Paser District, East Kalimantan Province which is the capacity of 2 x 1.0 MW. Wastewater sewerage that passed through oil palm plantations and settlements made water and soil pollution. Result of water test and soil fertility showed that there is no parameter of environmental control is higher than quality standards (PP No 101 Tahun 2014). The aim of TCLP (Toxicity Characteristic Leaching Procedure) testing is knowing the content of heavy metal in the soil. TCLP method is USEPA 3050B-96. The several heavy metals parameters are Ag, Hg, As, Zn, Pb, Cu, B, Ba, Cd, Cr, and S. The result showed that the content of these heavy metal are lower than quality standard. This indicated that the land and oil palm plantations were not polluted by heavy metals.

Analisis Pengaruh Variasi Arus dan Sudut Kampuh dengan Metode Pengelasan GTAW terhadap Sifat Mekanik dan Struktur Mikro Baja ST 41 Ridhwan Haliq; Himawan Tri Raharjo
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

The objective of research is to determine the effect of welding current on the hardness, tensile strength, and microstructure from GTAW welding with ER70S2. This research used ST 41 low alloy steel material containing C = 0,16 %, Si = 0,23 %, Mn = 0,69 %, S = 0,031 %, P=0,019 %, yield point 40 kg/mm2, tensile strength 52 kg/mm2, dan elongation 32 %. ST 41 steel welding is carried out with current variations of 90 A, 110 A and 130 A with GTAW welding methode. Types of variation of the notch use are ][, V and X. The specimens was subjected to hardness, tensile strength, and metallography. Based on the result of hardness test with the factor elimination method in obtaining the angle ][ notch with current 90 A, V notch with current 90 A, and X notch with current 110 A. Tensile test results of the three materials, the highest tensile strength at the X notch with current 110 A is 416,8 N/mm2. The lowest tensile strength is obtained at welds with ][ notch is 360.73 N/mm2. From result of metallograph that we get if X notch with current 110 A is more stable, than ][ notch with current 90 A and V notch with current 90 A.

Estimasi Kelajuan dan Volume Kendaraan Berdasarkan Model Makroskopik Arus Lalu Lintas Jalan Tol dengan Metode Extended Kalman Filter Febriana Prihatiningsih; Sigit Pancahayani; Subchan Subchan
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

In this thesis, the analysis of vehicles' determination of speed and volume in the traffic flow will be discussed by approach time. The analyzation of vehicles' speed and volume done by estimated on macroscopic term of traffic flow in the traffic jam with Extended Kalman Filter (EKF) method. The term of macroscopic views with measured the traffic variable by density the flow rate the flow rate of vehicle and also the vehicle speed's average. In the estimating process, forward difference scheme is implemented to the model and error are measured by Root Mean Square Error. The result showed that the estimation the average of the vehicle’s relative speed in a segment decreased when its volume of vehicle is increased and vice versa.

Rancang Bangun Alat Pendeteksi Kondisi Cuaca Kota Balikpapan Menggunakan Global Navigation Satellite System (GNSS) Wind Turbine Budiani Fitria Endrawati; Adhe Yusphie; Arum Prastiyo Putri; Azam Fadhil A; Mohammad Saiful R; Fadli Robiandi
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Balikpapan is one of the cities in East Kalimantan with unique characteristic of the region. The characteristics of the region and the height of the area from the sea surface of the city of Balikpapan is one of the factors, therefore need to be designed a tool to detect weather especially in Balikpapan city. The device design using Global Navigation Satellite System (GNSS) Wind Turbine. The measurement results are based on temperature, humidity and wind speed. From the measurement of temperature, humidity and wind speed obtained an average of 30.97oC; 73.49% and 2.91 m/s. According to method World Meteorological Organization, temperature, humidity and wind speed data is accepted.

Optimasi Pemakaian Material Struktur dengan Optimasi Bentuk (Shape Optimization) dan Cross Section pada Struktur Rangka Batang Terhadap Kendala Reliabilitas Material Menggunakan Metode Algoritma Genetik Augusta Adha
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Dewasa ini, proses kegiatan konstruksi dituntut mampu menerapkan prinsip-prinsip yang ramah lingkungan. Kegiatan konstruksi yang dimulai dari proses pengambilan material seperti semen, baja atau kayu sering kali dituding memberikan dampak kerusakan lingkungan yang sangat tinggi. Ditambah lagidengan penggunaan material struktur yang sangat boros dengan dalih untuk membuat struktur aman menyebabkan jejak lingkungan yang ditinggalkan oleh kegiatan konstruksi menjadi semakin besar dan kentara.Namun demikian, seiring perkembangan teknologi material dan metode konstruksi, saat ini kegiatan dan hasil konstruksi yang efisien dan ramah lingkungan telah menjadi hal yang wajib dan terus dikembangkan. Salah satu cara untuk efisiensi konstruksi adalah dengan optimasi struktur. Berbagai metode optimasi dikembangkan untuk menghasilkan struktur yang lebih efisien dan menggunakan material yang lebih sedikit, namun tetap mampu menahan beban-beban desain yang diberikan kepada struktur.Salah satu metode struktur Meta-heuristic yang populer adalah metode algoritma genetik. Paper ini akan membandingkan metode optimasi struktur dengan modifikasi pada cross section dan modifikasi pada bentuk struktur (shape) dengan kombinasi cross section, untuk menahan beban struktur rencana dengankendala-kendala tertentu. Sebuah struktur rangka batang sederhana menjadi subjek penelitian pada paper ini. Struktur rangka batang tersebut di optimasi dengan dua cara yaitu optimasi dengan perubahan cross section penampang dan optimasi dengan perubahan cross section penampang dan dilanjutkandengan perubahan bentuk struktur.Berdasarkan hasil analisa dapat di simpulkan, dengan menggunakan metode optimasi bentuk yang dikombinasikan dengan optimasi berat, maka didapat hasil optimasi struktur yang lebih baik.

Pemodelan airtanah dan Neraca Airtanah Dampak Penambangan Batubara Open Pit pada Lipatan Sinklin di Daerah Muara Lawa, Kabupaten Kutai Barat, Provinsi Kalimantan Timur Shalaho Dina Devy
SPECTA Journal of Technology Vol. 2 No. 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Ch a n g e s in land use impacts on groundwater availability both in quality and quantity. Study of geological, hydrogeological conditions, hydrological, hydrogeological boundary conditions contribute to determine the presence of groundwater in the groundwater basin and determine the natural groundwater flow modeling patterns. Location of the study are in Muara Lawa, including the formation Pulaubalang, Pamaluan, and Balikpapan on Lampanan syncline structure. Exploration drilling results indicate, that the hydrogeological study area into the aquifer system of folded sedimentary rocks consisting of seven aquifer layers alternating between akuitar, aquifers, and the base layer in the form of akuiklud. The area bounded by the limits of the model study of surface water in two major rivers, the Lawa River (east) and the Perak River (west), as well as the groundwater divide with the highest head (north and south. The results of the analysis of the type of regional aquifers aquifer models including the category of semi depressed with aquitards dominance in the surface layer. The pattern of groundwater flow and head height can be predicted by modeling using Visual Modflow. There is an increase zone budget is almost five times higher than the natural condition to the active mining conditions, particularly in the green zone, that of the natural conditions of 1,502 m3 day-1 to 12,930 m3 day-1 in the active mining. This is due, in the mining area there is a change in land use and hidrostratigrafi, namely the formation of pits that reach depths of 70 meters.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Syamsul Mujahidin

Contact Email
syamsul@lecturer.itk.ac.id

Phone
+6285931379488

Journal Mail Official
spectajournal@itk.ac.id

Editorial Address
Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location
Kota balikpapan,

Kalimantan timur

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Syamsul Mujahidin

Contact Email syamsul@lecturer.itk.ac.id

Phone +6285931379488

Journal Mail Official spectajournal@itk.ac.id

Editorial Address Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location Kota balikpapan, Kalimantan timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Syamsul Mujahidin

Contact Email
syamsul@lecturer.itk.ac.id

Phone
+6285931379488

Journal Mail Official
spectajournal@itk.ac.id

Editorial Address
Ruangan LPPM Gedung A lantai 2, Kampus ITK, Jl Soekarno Hatta KM 15, Karang Joang, Balikpapan, Balikpapan Utara, KALTIM

Location
Kota balikpapan,

Kalimantan timur

INDONESIA