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IPTEK The Journal for Technology and Science

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Published by Institut Teknologi Sepuluh Nopember Surabaya

ISSN : 08534098 EISSN : 20882033 DOI : -

Core Subject : Science,

Computer Science & IT

IPTEK The Journal for Technology and Science (eISSN: 2088-2033; Print ISSN:0853-4098), is an academic journal on the issued related to natural science and technology. The journal initially published four issues every year, i.e. February, May, August, and November. From 2014, IPTEK the Journal for Technology and Science publish three times a year, they are in April, August and December in online version.

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Articles 345 Documents

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Analysis of Aggregate Gradation to Improve The Characteristics of Geopolymer Based Asphalt Concrete Akhmad Taufik Aditama; Januarti Jaya Ekaputri; Ervina Ahyudanari
IPTEK The Journal for Technology and Science Vol 29, No 3 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

The previous study showed that asphalt concrete using filler geopolymer generate a higher value of stability. On the other hand, the value of flow and the porosity of the asphalt concrete were out of the specification range. This study examines the aggregate gradation analysis to improve the characteristics of mixed asphalt concrete geopolymer. The gradation of aggregate is variated into three following the available specification. The range of specification is then separated into three, those are aggregate gradation upper specifications, middle specification, and lower specification. Filler comes from geopolymer paste, composed of fly ash which is mixed with an activator. Activator is an 8 molar concentration of NaOH solution and Na₂SiO₃. The weight ratio of Na₂SiO₃ over the weight of NaOH solution was 1.5. Geopolymer paste waited until reached the age of 28 days, then pounded up to meet the requirement size of the sieve No. 200. The test of mixture characteristics was conducted to see the comparison of performance from different gradations. The test results showed that middle gradation generating characteristics of the mixture which is higher than upper gradation and lower gradation.

Fuzzy Control for Optimizing Ship Tracking in Karang Jamuang – Tanjung Perak A. Masroeri; Mohamad Aries Efendi; Eko B. Djatmiko; Wasis D. Aryawan; Fitri A. Iskandarianto
IPTEK The Journal for Technology and Science Vol 23, No 4 (2012)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Karang Jamuang West Track - Tanjung Perak is one of the busiest routes for sea transportation in Indonesia. This paper proposes an attempt to optimize the ship’s trajectory by designing a track keeping control along that track line. Control system is designed based on fuzzy logic (FLC). FLC design intended to control the speed and the bow of the ship in order to keep the track. FLC 1 control the speed of the input changing by the distance, while the FLC 2 control the prow with yaw angle and yawrate error input. As an object for autopilot is Brotojoyo MT tanker. The research was done by simulation, and generate the ability of FLC which able to keep the track with small error

Effect of Screw Diameter in Femoral Fracture Fixation Modeled by Finite Element Method Muhammad Nashrullah; Belladina Clara Shinta; Mas Irfan P. Hidayat; Agung Purniawan; Yuli Setiyorini
IPTEK The Journal for Technology and Science Vol 28, No 1 (2017)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Research in the field of biomechanics related to orthopedic implants is rapidly growing in the world, especially for fixation of fractured bone. Fixation is a surgery to locate and attach a plate pressed by screws at the fractured bone. Most of the fracture bones sited in femur. This research focuses on modeling and simulation of plate and screw made of SS316L material for the fixation of the fractured femur using finite element method (FEM). SS316L is a material with good biocompatibility, cheap, and ductile enough. Modeling and simulation done using ANSYS 15.0 software. Simulation results are stress, strain, and total deformation. It is obtained that optimum diameter of screw is 4.5 mm with respect to minimum value of von Mises stress and deformation.

Performance Analysis of Various Routing Protocols in 3D Body Architecture using Qualnet in WBSN Deepak Sethi; Partha Pratim Bhattacharya
IPTEK The Journal for Technology and Science Vol 29, No 2 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Wireless Body Sensor Network (WBSN) is a connectionless architecture used to monitor health of a patient or an athlete. Various routing strategies have been proposed to increase the network lifetime. In this work, we have compared some well known ad-hoc network routing protocols like DYMO, DSR, ZRP and LAR1 in WBSN. WBSN works in a small area like Bluetooth or Zigbee. Few gateway nodes are also considered to route the traffic. The simulations have been performed using Qualnet 6.1. Various parameters like jitter, throughput, end to end delay, packet delivery ratio has been used for comparison. Results revealed that ZRP have least end to end delay (0.2) and jitter (0.1), but have low throughput i.e. 2362 b/s as compared to DYMO and DSR i.e. 2752 b/s and 3026 b/s.

Multicylinder Engine Shaking Forces and Moments Samuel Doughty
IPTEK The Journal for Technology and Science Vol 27, No 2 (2016)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

The dynamic forces and moments arising from the motion of internal components in IC engines are known as Shaking Forces and Shaking Moments. Thes forces and moments are transmittted directly to the supporting structure, whether it be a concrete block or a ship's frame. They can cause significant damage if not properly evaluated at the design stage. It should be noted that these are inertial reactions only, and are unaffected by cylinder firing pressure. By a driect appeal to fundamental momen- tum principles, this paper presents an elegant and completely general approach to their determination, based on fundamental momentum principles. This is much more simple than the conventional direct approach through the piece-by-piece application of Newton's Second Law

Utilization Management of Landfill Zones Based on Volume of Municipal Organic Waste Simulation Philip Faster Eka Adipraja; Mufidatul Islamiyah; Ida Wahyuni
IPTEK The Journal for Technology and Science Vol 29, No 1 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Talangagung landfill is one of the zones that well managed by the government of Malang Regency which uses sanitary landfill method. Additionally, it’s also succeeded in the utilization of methane gas which has already distributed to the residents around the landfill directly from the landfill zones for daily purposes. For a couple of years, the processing of municipal waste in Talangagung is quite well, however, the significant increase in the waste generation could lead to new management problems in the landfill. The prediction on the waste volume on next 20 years shows that the increased amount of waste volume soon or later will exceed the current capacity of landfill zones. The previous study about waste degradation shows the different time periods of degradation in various waste as fast as just about a month to more than 7 months. The simulation from this study shows that around 2004 require 2 landfill zones to use simultaneously. Hereafter, the prediction shows while in 2018 the landfill requires 3 zones used simultaneously, starts from 2025 there is necessary to use 4 zones simultaneously. Based on the simulation result, the landfill will overload in around 2026. The models in this study were validated with a small error of E1 about 2.33% and the error of E2 about 0.76%.

The Impact of Coastal Tourism Activities on Water Quality at Baluran National Park Nike Ika Nuzula; Haryo D. Armono; Daniel M. Rosyid
IPTEK The Journal for Technology and Science Vol 28, No 2 (2017)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Baluran is a national park identified as biologically and nun-biologically rich area in East Java. It has physical landscapes with high tourism potential. In the past five years, tourists visit has significantly increased, where leds to water quality degradation around the coast. The aim of this research is to determine the relationship between tourists visit and water degradation phenomena in the area of study. The PCA (Principal Component Analysis) and IPL (Environmental Pollution Index) is used for analysis. Research was performed in the rainy and dry seasons. The correlation of water quality parameters in dry season is higher than in the rainy season. Water environment pollution index is 0.027 (category not polluted) in dry season and 0.48 (category not polluted) in rainy seasons.

Siamese Long Short-Term Memory for Detecting Conflict of Interest on Scientific Papers Ilmi, Akhmad Bakhrul; Purwitasari, Diana; Fatichah, Chastine
IPTEK The Journal for Technology and Science Vol 30, No 2 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Scientific articles cited by other researchers have an impact on increasing author credibility. However, the citation process may be misused to unnaturally raise a bibliometric indicator value such as researcherâ€™s h-index. Researchers may overly cites their own works, referred as self-citation, even though the topic of the references are not related to the current article. Further misconduct is excessive citations on the works of peoples related to the researcher which can be coercive or not, referred as conflict of interest (CoI). The proposed method uses a deep learning approach, Siamese Long ShortTerm Memory (LSTM), to recognize subject similarities between a scientific article and its references. Standard text similarity fails to do so because contextual relatedness of sentences in the articles need some learning process. Siamese-LSTM learns contextual relatedness of sentences in the article using two identical LSTM. Steps of the proposed method are (i) word-embedding to get weight values of terms but still considers their semantic relations, (ii) k-means clustering to generate training data for reducing time complexity in Siamese-LSTM learning of scientific articles, (iii) learns Siamese-LSTM weight from training data to identify contextual relatedness of sentences, (iv) calculate similarity of a scientific article with its references based on Siamese-LSTM. The empirical experiments are used to analyze similarity values and the possibility for conflict of interest in an article.

Designing of Medium-Size Humanoid Robot with Face Recognition Features Christian Tarunajaya; Oey, Kevin Wijaya; Reinard Lazuardi Kuwandy; Heri Ngarianto; Alexander Agung Gunawan; Widodo Budiharto
IPTEK The Journal for Technology and Science Vol 26, No 2 (2015)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Nowadays, there have been so many development of robot that can receive command and do speech recognition and face recognition. In this research, we develop a humanoid robot system with a controller that based on Raspberry Pi 2. The methods we used are based on Audio recognition and detection, and also face recognition using PCA (Principal Component Analysis) with OpenCV and Python. PCA is one of the algorithms to do face detection by doing reduction to the number of dimension of the image possessed. The result of this reduction process is then known as eigenface to do face recognition process. In this research, we still find a false recognition. It can be caused by many things, like database condition, maybe the images are too dark or less varied, blur test image, etc. The accuracy from 3 tests on different people is about 93% (28 correct recognitions out of 30).

Identification of Soil Contamination using VLF-EM and Resistivity Methods: A Case Study Rahmatun Inayah; Bagus Jaya Santosa; Dwa Desa Warnana; Firman Syaifuddin; Juan Pandu Gya Nur Rochman; Wien Lestari; Amien Widodo
IPTEK The Journal for Technology and Science Vol 30, No 1 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Hazardous waste is a waste with properties which can pollute and damage the environment, human health, and other living things. Lakardowo is a village that is suspected of being contamination by hazardous waste derived from industrial activities. Measurements with the VLF-EM and Resistivity method were used in this study. In addition, ground water level mapping and soil sampling in locations around the industry were conducted for the XRF test. Groundwater mapping results show that groundwater flow lead to the Northeast-South and Southwest of the industrial site. The soil samples that have been tested by XRF show the presence of heavy metals, wherein hazardous wastes generally contain various types of heavy metals that are conductive or have low resistivity values. Quantitative interpretation of VLF-EM data shows the presence of low resistivity anomalies at several measurement sites, which are suspected to have been contaminated with soil by waste. Resistivity data processing results, showing a low resistivity anomaly (≤ 3 Ω.m) located to the north (near an industrial site) and spreading towards the southwest along the measurement path. The result of a combination of quantitative interpretations of both methods, obtained, the direction of anomalous flow of hazardous waste moves southeastward and towards deeper soil coating following the direction of rock coating.

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