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International Journal of Computing Science and Applied Mathematics

ijcsam
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Published by Institut Teknologi Sepuluh Nopember Surabaya

ISSN : - EISSN : 24775401 DOI : -

Core Subject : Science, Education,

Computer Science & IT Education Mathematics

(IJCSAM) International Journal of Computing Science and Applied Mathematics is an open access journal publishing advanced results in the fields of computations, science and applied mathematics, as mentioned explicitly in the scope of the journal. The journal is geared towards dissemination of original research and practical contributions by both scientists and engineers, from both academia and industry.

Arjuna Subject : -

Articles 155 Documents

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Safety Verification of Uncertain Max-Plus-Linear Systems Aditya Putra Pratama; Subchan Subchan; Dieky Adzkiya
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

In this work, we discussed the verification of autonomous uncertain Max-Plus-Linear (uncertain MPL) systems with respect to safety property by using the reachability analysis approach. More precisely, given an uncertain MPL system, a nonempty set of initial conditions, a time horizon and an unsafe set, we want to determine whether the state can reach the unsafe set within the given time horizon. If the unsafe set is reachable, then the system is not safe. Otherwise, the system is safe. Our approach uses the piecewise affine representation of MPL systems to compute the reachable sets exactly.

Fuzzy Prime Ideals of ADL's Ch. Santhi Sundar Raj; Natnael Teshale Amare; Uppasetti Madana Swamy
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

In this paper the concept of prime L-fuzzy ideals and L-fuzzy prime ideals of an ADL A with truth values in a complete lattice L satisfying the infinite meet distributive law are introduced. All prime L-fuzzy ideals of a given ADL A are determined by establishing a one-to- one correspondence between prime L-fuzzy ideals of an ADL A and the pairs (P;a), where P is a prime ideal of A and a is a prime element in L. Also, here minimal prime L-fuzzy ideals and L-fuzzy minimal prime ideals of an ADL A are introduced and characterized.

Comparison between Fuzzy Logic Controller (FLC) and Fractional Order Proportional Integral Derivative (FOPID) Controller on Water Level and Steam Temperature of Steam Drum Boiler Zainullah Zuhri; Mardlijah Mardlijah; Didik Khusnul Arif
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Steam drum boiler is an important component of boiler on electric steam power plant which is useful to obtain steam. The obtained steam makes turbine spin. In order to obtain maximal result for the steam power plant (PLTU) 1-2 PT PJB UP Gresik, the water level of steam drum boiler must be 0.7625 m and the temperature of steam drum boiler must be 786 K. Thus, it needs some controller to keep the position of water level and the temperature stable. In this problem, we compare two controllers FLC and FOPID. It can be concluded that FLC works better than FOPID controller. Nevertheless, FOPID controller has faster response time than FLC, i.e. no overshoot and more robust when disturbance is present on the system.

Transitive and Absorbent Filters of Implicative Almost Distributive Lattices Berhanu Assaye Alaba; Mihret Alamneh; Tilahun Mekonnen Munie
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

In this paper, we introduce the concept of transitive and absorbent filters of implicative almost distributive lattices and studied their properties. A necessary and sufficient condition is derived for every filter to become a transitive filter. Some sufficient conditions are also derived for a filter to become a transitive filter. A set of equivalent conditions is obtained for a filter to become an absorbent filter.

Back Cover Vol 4 No 2 August 2018 IJCSAM IJCSAM
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Modeling and Forecasting Rainfall in Ethiopia Tesfahun Berhane; Nurilign Shibabaw; Gurju Awgichew; Tesfaye Kebede
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Ethiopian economy is extremely dependent on agricultural sector, which contributes 45% to the Gross Domestic Product (GDP), 85% foreign earnings and provides livelihood to 80% of the population. Ethiopian agriculture is highly dependent on natural rainfall, with irrigation agriculture accounting for less than 1% of the country’s total cultivated land. Therefore, modeling and forecasting the rainfall dynamics of the country has a great importance. This paper aims at examining the rainfall dynamics and fit appropriate model for forecasting Ethiopian rainfall. In this research, we apply Box-Jenkins approach, Seasonal Autoregressive Integrated Moving Average (SARIMA) model in order to forecast monthly rainfall of Ethiopia for the period of twelve months ahead. Monthly rainfall data from 1901 to 2015 were used from world bank group (climate change portal). Appropriate SARIMA model has been identified based on an Akaike information criteria (AIC) and Bayesian information criteria (BIC) for forecasting the amount of monthly average rainfall. Farmers, in general agricultural sectors, policy makers, tourists, and investors engaged in the construction industry are some of the sectors benefited from this result.

Front Cover Vol 4 No 2 August 2018 IJCSAM IJCSAM
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Shadow Removal Based on Gamma Decoding Method for Moving Object Images Hasanuddin Alhabib; Budi Setiyono
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 4, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Shadows are reflections of objects exposed to light. So there is an image pixel that has a darker intensity than the object’s pixel. The development of digital technology, the shadow into noise on digital images and digital video. Therefore, the information on the image becomes inaccurate. One of the usage of digital image or video digital is intelligent transportation system using digital video-based CCTV camera. But the use of digital video has several problems, including the presence of a shadow. Therefore, it is necessary to have a method to eliminate shadows. In this paper, we use gamma decoding method to determine object pixels and pixel shadow based on the illumination of the object, so the shadow pixels can be eliminated. The result of this research is images without shadow.

Application of Daubechies Wavelet Transformation for Noise Rain Reduction on the Video Siti Khotijah; Dwi Ratna Sulistyaningrum
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 5, No 1 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Currently, the use of digital video in the field of computer science is increasingly widespread, such as the process of tracking objects, the calculation of the number of vehicles, the classification of vehicle types, vehicle speed estimation and so forth. The process of taking digital video is often influenced by bad weather, such rain. Rain in digital video is considered noise because it is able to block objects being observed. Therefore, a rainfall noise reduction process is required in the video. In this study, the reduction of rain noise in digital video is using Daubechies wavelet transformation through several processes, namely: wavelet decomposition, fusion process, thresholding process and reconstruction process. The threshold value used in the thresholding process is VishuShrink, BayesShrink, and NormalShrink. The result of the implementation and noise reduction test show that Daubechies db2 level 3 filter gives the result with the biggest PSNR value. As for the type of threshold that provides optimal results is VishuShrink.

Front Cover Vol. 5 No. 1 May 2019 Editor IJCSAM
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 5, No 1 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

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