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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 5 Documents

Search results for , issue "Vol 29, No 1 (2018)" : 5 Documents clear

Separating Multi Speeches in Intelligent Humanoid Robot using FastICA Heri Ngarianto; Alexander A S Gunawan; Widodo Budiharto
IPTEK The Journal for Technology and Science Vol 29, No 1 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

The main objective of our research is to develop an intelligent humanoid robot for teaching children by listening and answering the questions. In our previous research, we have designed a humanoid robot that can detect human face and receive commands by using speech recognition. Our robot is based on Bioloid GP robot and Raspberry Pi2 as control system. In this study, we would like to expand the capability of the robot system in order to isolate the speech of one speaker from all the other sounds. The problem for separating multi speeches from stereo audio record is called as Blind Speech Separation (BSS). We propose FastICA algorithm to solve the BSS problem. FastICA is an efficient algorithm to separate several signals based on Independent Component Analysis (ICA) algorithm. Some assumption must be met to use FastICA, that is the number of mixtures are equal to the number of sources and the sources are linearly independent from each other. To evaluate the algorithm, we use several simulations based on two speech sources and its mixing matrix. Our simulation shows FastICA algorithm can solve BSS problem by separating two sound signals, but its linearly independent assumption makes it difficult to implement in our humanoid robot

THE IMPACT OF OUTBOUND TRAINING ACTIVITY ON ORGANIZATION MISSION STATEMENT (CASE IN EDUCATION MISSION STATEMENT MMT-ITS) Handiwibowo, Gogor Arif; Suef, Mokhamad
IPTEK The Journal for Technology and Science Vol 29, No 1 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

In the review of organizational behavior, effective organizations require process variables component. One of the process variables form is the existence of training design for members of the organization. The training can encourage an organization member to be an effective member. Outbound training as one of the training methods has been popular since the 1990s and has become a trend for human resource development. As a training method, outbound training with several specific goals has been widely researched and has proven to have a positive impact on team building in teamwork. On the other hand, an organization has formulated an organizational vision in the strategic management context. The organization vision than set the mission statements to coordinate of proposed goals of the organization. Furthermore, every activity in an organization should reflect and base on mission statements value to achieve its strategic competitiveness. This research examines the role of outbound training objective as a contingency factor which affects the mission statement of an organization. The research took the case in MMT-ITS as the education organization. The outbound training objective divide into two objectives, the scientific objective, and internal objective and set as the variable factor. The mission statement studied in this case is education mission statement in MMT-ITS.

Sample Based Trip Length Distribution Quality based on χ^2 and Mean Absolute Error Value Hitapriya Suprayitno; Vita Ratnasari; Nina Saraswati; Citto Pacama Fajrinia
IPTEK The Journal for Technology and Science Vol 29, No 1 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

As a vital part of transport modelling, the trip length distribution is normally gotten from a sample. In order to get a good model, a method to test the quality of the sample based trip length distribution must be avaliable. A method to measure this quality has ever been developed, but it was found that the existing method still can be improved. While still using goodness of fit statistical test, the new method propose two quality measurements. First, to verify whether the observed trip length distribution is conforrm to the reference trip length distribution at a certain confidence level value, indicated by a value of . Second, to verify whether the error, mean absolute error measured in percentage, |e%| = 100 × |e|mean / xi,mean is acceptable. The new method can be used, while still fulfilling the basic principle of sample quality measure, i.e. satisfying maximum acceptable error at a certain confidence level.

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%.

Ethnobotanical Study on Tidung Tribe in Using Plants for Medicine, Spice, and Ceremony Listiani Listiani; Fadhlan Muchlas Abrori
IPTEK The Journal for Technology and Science Vol 29, No 1 (2018)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Ethnobotany is a study that is related to plants and their use. This study is based on the reality that human kinds cannot be separated from their nature. Interestingly, different tribes has different ways in using natural resources. In in Indonesia, study ethnobotany has enriched the variety of ethnobiology study. This is because Indonesia has various tribes and each tribe has their own ways in interacting with their nature, including the way they use plants for daily life. One of tribes that has been studied is Tidung. Tidung is a tribe that inhabits the north area of Kalimantan, Indonesia. This tribe is using plants for medicine, spice, and ceremony. This study has been done by interviewing people who are Tidung tribe. The result shows that there are 20 medicinal plant species, 16 spice plant species, and eight ceremonial plant species. Mostly, the Tidung tribe use plants for medicine which means that this tribe highly depends on the nature of mainataining their health.

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