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All Journal VALENSI Perfecting a Video Game with Game Metrics Journal on Mathematics Education (JME) Journal on Mathematics Education (JME) Jurnas Nasional Teknologi dan Sistem Informasi International Conference on Coastal and Delta Areas BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Telematika
Atje Setiawan Abdullah
Universitas Padjadjaran
Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Transportation Other

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ETHNOMATHEMATICS IN PERSPECTIVE OF SUNDANESE CULTURE Abdullah, Atje Setiawan
Journal on Mathematics Education Vol 8, No 1 (2017)
Publisher : Department of Doctoral Program on Mathematics Education, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (170.941 KB) | DOI: 10.22342/jme.8.1.3877.1-16

Abstract

This study is an exploratory research aims to find and know about a phenomenon by exploration. Therefore, the approach used in this study is ethnographic approach, an empirical and theoretical approach to get description and deep analysis about a culture based on field study. From the sustainable interviews and confirmation about field research with some community leaders in Cipatujah district, Tasikmalaya regency and in Santolo Pameungpeuk beach, Garut regency; it is found that Ethnomathematics is still widely used by Sundanese people especially in rural areas: the use of measurement units, mathematical modeling, and the use of clock symbols. The results of this study can be useful for Sundanese people and the government of West Java in education, cultural services, and tourism. Keywords: Ethnomathematics, Unit Calculation, Modeling, Symbolic Time DOI: http://dx.doi.org/10.22342/jme.8.1.3877.1-15
Feature Extraction Analysis for Hidden Markov Models in Sundanese Speech Recognition Intan Nurma Yulita; Akik Hidayat; Atje Setiawan Abdullah; Rolly Maulana Awangga
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 5: October 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i5.7927

Abstract

Sundanese language is one of the popular languages in Indonesia. Thus, research in Sundanese language becomes essential to be made. It is the reason this study was being made. The vital parts to get the high accuracy of recognition are feature extraction and classifier. The important goal of this study was to analyze the first one. Three types of feature extraction tested were Linear Predictive Coding (LPC), Mel Frequency Cepstral Coefficients (MFCC), and Human Factor Cepstral Coefficients (HFCC). The results of the three feature extraction became the input of the classifier. The study applied Hidden Markov Models as its classifier. However, before the classification was done, we need to do the quantization. In this study, it was based on clustering. Each result was compared against the number of clusters and hidden states used. The dataset came from four people who spoke digits from zero to nine as much as 60 times to do this experiments. Finally, it showed that all feature extraction produced the same performance for the corpus used.
A Computational Study on the Effects of Molecular Structures of Di-n-butyldithiophosphate and of its Derivatives on the Stability of Their Complex Compounds with Rare-Earth Elements Nurdeni Nurdeni; Atje Setiawan Abdullah; Budi Nurani Ruchjana; Hardianto A; Anggraeni A; Muthalib A; Husein H Bahti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.572 KB) | DOI: 10.15408/jkv.v5i2.10652

Abstract

The stability of complex compounds  formed from the ligand di-n-butyldithiophosphate (DBDTP) and its derivatives, with ions of rare-earth elements (REEs), such as gadolinium ion (Gd3+), is an important factor in the separation and purification processes of the elements using solvent extraction method. The complex stability is dependent, one of which, on the partial charge of the donor atom (S atom in this case) in the molecule of DBDTP or its derivatives. The more negative the partial charge of the donor atom, the more stable is the complex compound formed. The purpose of this study is to explore the effect of electron donating, and of electron withdrawing groups, as well as the effect of the structure of the butyl group in the molecules of  DBDTP and or its derivatives on the partial charge of the donor atom. The method used was the semi empirical quantum mechanical calculations, i.e. the Austin Model 1 (AM1). The results of the study showed that the electron withdrawing group of -CN had resulted in the most positive charge on the donor atom, if it is on the second carbon atom of the butyl group in the DBDTP and or its derivatives. Conversely, in the same carbon atom position, the donating electron group of -CH=CH2 had generated the most negative partial charge on the donor atom. Furthermore, the results of this study also revealed that the sec-butyl isomer produced the most negative partial charge on the donor atom, among other isomers.
ETHNOMATHEMATICS IN PERSPECTIVE OF SUNDANESE CULTURE Atje Setiawan Abdullah
Journal on Mathematics Education Vol 8, No 1 (2017)
Publisher : Department of Doctoral Program on Mathematics Education, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.8.1.3877.1-16

Abstract

This study is an exploratory research aims to find and know about a phenomenon by exploration. Therefore, the approach used in this study is ethnographic approach, an empirical and theoretical approach to get description and deep analysis about a culture based on field study. From the sustainable interviews and confirmation about field research with some community leaders in Cipatujah district, Tasikmalaya regency and in Santolo Pameungpeuk beach, Garut regency; it is found that Ethnomathematics is still widely used by Sundanese people especially in rural areas: the use of measurement units, mathematical modeling, and the use of clock symbols. The results of this study can be useful for Sundanese people and the government of West Java in education, cultural services, and tourism. Keywords: Ethnomathematics, Unit Calculation, Modeling, Symbolic Time DOI: http://dx.doi.org/10.22342/jme.8.1.3877.1-15
Pengembangan Sistem Informasi Geografis Kebun Binatang Berbasis Progressive Web Application (PWA) dengan Metode Prototype (Studi Kasus Kebun Binatang Bandung) Muhammad Fadillah Arsa; Atje Setiawan Abdullah; Juli Rejito
Jurnal Nasional Teknologi dan Sistem Informasi Vol 7, No 3 (2021): Desember 2021
Publisher : Jurusan Sistem Informasi, Fakultas Teknologi Informasi, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/TEKNOSI.v7i3.2021.119-129

Abstract

Kebun binatang merupakan tempat yang memiliki peran strategis terhadap aspek konservasi satwa, sosial ekonomi masyarakat, maupun lingkungan. Kebun Binatang Bandung sebagai salah satu kebun binatang di Indonesia sudah seharusnya dapat dikelola dengan baik dengan memberikan fasilitas pelayanan yang mumpuni. Namun pada saat ini Kebun Binatang Bandung masih belum memiliki fasilitas layanan petunjuk arah, peta, dan informasi satwa yang memadai. Hal tersebut melatarbelakangi adanya penelitian pengembangan aplikasi Sistem Informasi Geografis Kebun Binatang Bandung ini. Tujuannya agar pengunjung Kebun Binatang Bandung dapat lebih mudah dan nyaman dalam menjelajahi kebun binatang, serta bisa mendapatkan informasi lebih dalam mengenai satwa yang dilihatnya. Pengembangan aplikasi menggunakan metode pengembangan perangkat lunak Prototype yang dinilai baik untuk pengembangan aplikasi berskala kecil. Metode Prototype terdiri dari lima tahap pengembangan yakni Communication, Quick Plan, Modeling Quick Design, Construction of Prototype, dan Deployment Develivery Feedback. Sementara itu, aplikasi dibuat berbasis Progressive Web Application (PWA) yang mudah diakses namun tetap memberikan fitur-fitur yang menarik layaknya aplikasi native. Hasil pengembangan aplikasi kemudian diujicobakan dengan menggunakan metode System Usability Scale (SUS) dan Retrospective Think Aloud (RTA). Dari hasil pengujian, didapat didapat nilai usabilitas sebesar 81,43 (Skor SUS) yang tergolong ke dalam kategori Acceptable. Dengan demikian dapat disimpulkan bahwa aplikasi ini diterima dan layak untuk digunakan.
IMPACT OF EL NINO, IOD, AND MONSOON IN DETERMINING THE POSSIBILITY OF EXTREME RAINFALL OVER SEVERAL REGION AT WEST JAVA Eddy Hermawan; Atje Setiawan Abdullah; Budi Nurani Ruchjana; I Gede Nyoman Mindra; Shailla Rustiana
International Conference on Coastal and Delta Areas Vol 1, No 2 (2015): the 2th International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study is mainly concerned an application of SST Niño 3.4, IOD and Monsoon index in determining the upcoming of the extreme rainfall over the Indonesian Maritime Continent (IMC). As one of the most important region located along the belt equator, the meteorological surface parameter over the IMC suspected is effecting mostly by the Monsoon system. This is a unique country, since located between two great continent (Asia and Australia) and two great ocean (Indian and Pacific). It indicates that the Sea Surface Temperature (SST) should become one of the most important parameter. Although, this region is affected by the Monsoon system, but another event called as the Indian Ocean Dipole (IOD) and El Niño suspected has a great effects also in determining the rainfall anomalies, especially for the extreme conditions. By this reason, we investigated the IOD and El-Niño index signal, especially the SST Niño 3.4 index. By assuming the drought and wet extreme condition is mostly affected by both parameter, we analysed the IOD and SST Niño 3.4 index for period of 1976 to 2000. For study cases, we concentrated to analyse the monthly rainfall data over Java Island, especially when the strongest El Niño and Dipole Mode event comes simultaneously. By applying the Multiple Linear Regression, we found the suitable formula of rainfall prediction over several region at West Java Province. Then, we applied the CPT (Climate Predictability Tools) technique, we found that drought extreme season is mostly affected by El-Niño event, while wet extreme season is mostly affected by the Dipole Mode event. Although, the recent value of SST Niño 3.4 gradually increase more than 2.4oC, however, if the IOD index still going on to the normal (neutral) condition, we suspect that until the end of this year, the drought extreme condition almost never attack to IMC, especially over Java Island. On the other hand, the Dipole Mode looks more responsible in determining the behaviour of rainfall anomalies over Java Island than El Niño event. In the end of ths study, we found that interaction between Monsoon, IOD and El-Niño will give more powerful to determine the rainfall anomalies for next year.
PRINCIPAL COMPONENT ANALYSIS-VECTOR AUTOREGRESSIVE INTEGRATED (PCA-VARI) MODEL USING DATA MINING APPROACH TO CLIMATE DATA IN THE WEST JAVA REGION Devi Munandar; Budi Nurani Ruchjana; Atje Setiawan Abdullah
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 16 No 1 (2022): BAREKENG: Jurnal Ilmu Matematika dan Terapan
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1056.381 KB) | DOI: 10.30598/barekengvol16iss1pp099-112

Abstract

Over a long time, atmospheric changes have been caused by natural phenomena. This study uses the Principal Component Analysis (PCA) model combined with Vector Autoregressive Integrated (VARI) called the PCA-VARI model through the data mining approach. PCA reduces ten variables of climate data into two principal components during ten years (2001-2020) of climate data from NASA Prediction Of Worldwide Energy Resources. VARI is a non-stationary multivariate time series to model two or more variables that influence each other using a differencing process. The Knowledge Discovery in Database (KDD) method was conducted for empirical analysis. Pre-processing is an analysis of raw climate data. The data mining process determines the proportion of each component of PCA and is selected as variables in the VARI process. The postprocessing is by visualizing and interpreting the PCA-VARI model. Variables of solar radiation and precipitation are strongly correlated with each measurement location data. A forecast of the interaction of variables between locations is shown in the results of Impulse Response Function (IRF) visualization, where the climate of the West Java region, especially the Lembang and Bogor areas, has strong response climate locations, which influence each other.
Sistem Informasi Geografis Pemetaan Permainan Tradisional di Indonesia dengan Rapid Application Development Berbasis Website Raissa Amini; Atje Setiawan Abdullah; Aditya Pradana
Jurnal Telematika Vol 17, No 2 (2022)
Publisher : Institut Teknologi Harapan Bangsa

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Abstract

Indonesia is one of the largest archipelagic countries in the world with a very diverse culture. One of them is a traditional game. Along with the times, traditional games began to be abandoned by society. Many traditional games in each region are still unknown to the public because the information is not managed and systematic. Therefore, it is necessary to develop a web-based geographic information system for mapping traditional games in Indonesia. Web development in this study uses the Rapid Application Development (RAD) method which aims to shorten the time with 4 phases (Requirements Planning, User Design, Construction and Cutover). The end result of this research is a website-based system with user and admin features. The main user feature is an interactive map of the spread of traditional games, while the admin feature is data management for traditional games, provinces and admin. The results of system testing with black-box testing are as expected. Testing with UEQ obtains a scale value above 2 which means positive and an excellent benchmark. From these results, it's known that the development of a web-based geographic information system mapping traditional games in Indonesia is feasible to use. Indonesia merupakan salah satu negara kepulauan terbesar di dunia dengan kebudayaan yang sangat beragam. Salah satunya adalah permainan tradisional. Seiring dengan perkembangan zaman, permainan tradisional mulai ditinggalkan masyarakat. Permainan tradisional di tiap daerah masih banyak yang belum diketahui masyarakat karena informasinya belum terkelola dan sistematis. Oleh karena itu, perlu dibangun suatu sistem informasi geografis berbasis website untuk pemetaan permainan tradisional di Indonesia. Pengembangan web dalam penelitian ini menggunakan metode Rapid Application Development (RAD) yang bertujuan untuk mempersingkat waktu dengan 4 fase (Requirements Planning, User Design, Construction dan Cutover). Hasil akhir dari penelitian ini adalah sebuah sistem berbasis website dengan fitur pengguna dan admin. Fitur utama pengguna adalah peta interaktif persebaran permainan tradisional, sedangkan fitur admin adalah pengelolaan data permainan tradisional, provinsi, dan admin. Hasil pengujian sistem dengan black-box testing sesuai dengan yang diharapkan. Pengujian dengan UEQ memperoleh nilai skala di atas 2 yang artinya positif dan benchmark yang sangat baik (excellent). Dari hasil tersebut diketahui bahwa pengembangan sistem informasi geografis pemetaan permainan tradisional di Indonesia berbasis web layak untuk digunakan.
Co-Authors Aditya Pradana Akik Hidayat Anggraeni A Budi Nurani Ruchjana Devi Munandar Eddy Hermawan Hardianto A Husein Hernadi Bahti I Gede Nyoman Mindra Intan Nurma Yulita Juli Rejito Muhammad Fadillah Arsa Muthalib A Nurdeni, Nurdeni Raissa Amini Rolly Maulana Awangga, Rolly Maulana Shailla Rustiana