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All Journal VALENSI TELKOMNIKA (Telecommunication Computing Electronics and Control) 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 JTAM (Jurnal Teori dan Aplikasi Matematika) Jurnal Telematika Jurnal Matematika UNAND Jurnal Restikom : Riset Teknik Informatika dan Komputer STATISTIKA
Atje Setiawan Abdullah
Department Of Computer Science, Faculty Of Mathematics And Natural Sciences, Padjadjaran University, Indonesia
Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy 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 and 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.
Comparison of Spatial Weight Matrices in Spatial Autoregressive Model: Case Study of Intangible Cultural Heritage in Indonesia Muhamad Sobari; Armalia Desiyanti; Devi Yanti; Putri Monika; Atje Setiawan Abdullah; Budi Nurani Ruchjana
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 7, No 1 (2023): January
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v7i1.10757

Abstract

Intangible Cultural Heritage (ICH) can effectively contribute to Sustainable Development Goals (SDGs) in all economic, social, and environmental dimensions, along with peace and security. Studying ICH in Indonesia cannot be separated from the spatial aspect of how an area's attributes are related to other areas located close to each other. Spatial regression modeling needs to be done by considering the selection of spatial weight matrix. Using the wrong spatial weight matrix will increase the standard error in parameter estimation. Therefore, this study aims to determine: the best spatial weight matrix to accommodate the spatial autocorrelation in analyzing the description of the spread of ICH in Indonesia; and the variables that are thought to influence the number of ICH determination in Indonesia. The spatial regression modeling used in this study is the Spatial Autoregressive (SAR) model and the spatial weight matrices compared in this study are queen contiguity and inverse distance. The best model is the SAR model used the queen contiguity spatial weight matrix because it has minimum values of AIC, BIC, RMSE and MAPE which are 310.397, 319.555, 18.857 and 57.169 respectively. Simultaneously, involved in performing arts, wearing traditional dress, knowing Indonesian folklore and the spatial lag contribute significantly to number of ICH determination in Indonesia. Partially, only knowing Indonesian folklore have a significant effect on number of ICH determination in Indonesia at significance level α=5%. Each additional 1% of population that knowing Indonesian folklore in an area increases number of ICH determination in that area by 0.6719 units . 
MENGUKUR KERAGAMAN WARISAN BUDAYA TAKBENDA INDONESIA DENGAN INDEKS GINI Rizka Pradita Prasetya; Dian Islamiaty Puteri; Putri Monika; Atje Setiawan Abdullah; Budi Nurani Ruchjana
Jurnal Matematika UNAND Vol 12, No 1 (2023)
Publisher : Departemen Matematika dan Sains Data FMIPA Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jmua.12.1.95-107.2023

Abstract

Indeks gini merupakan alat mengukur derajat ketidakmerataan distribusi yang didasarkan pada kurva Lorenz. Indeks Gini berkisar dari nol hingga satu, di mana nol mewakili kesetaraan sempurna dan satu mewakili keberagaman yang hampir sempurna. Dalam penelitian ini, indeks gini digunakan untuk melihat kemerataan distribusi keragaman warisan budaya takbenda Indonesia. Hasil analisis menunjukkan bahwa indeks gini Warisan Budaya Takbenda yang telah ditetapkan lebih besar dibandingkan Warisan Budaya Takbenda yang tercatat.
Identifikasi Autokorelasi Spasial Warisan Budaya Tak Benda di Indonesia Menggunakan Indeks Moran Maryanto Rompon; Hamim Tsalis Soblia; Putri Monika; Atje Setiawan Abdullah; Budi Nurani Ruchjana
Statistika Vol. 23 No. 2 (2023): Statistika
Publisher : Department of Statistics, Faculty of Mathematics and Natural Sciences, Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/statistika.v23i2.2675

Abstract

ABSTRAK Perkembangan peradaban manusia merupakan bagian dari hasil akulturasi maupun asimilasi kebudayaan. Indonesia adalah rumah bagi 1.340 suku bangsa dan memiliki 2.500 jenis bahasa. Ini juga memiliki ribuan benda dan tak benda warisan budaya. Oleh karena itu, kekayaan negara yang tidak ternilai ini harus dimanfaatkan sepenuhnya untuk menjadi kekuatan yang mendorong kemajuan Indonesia. Arah pembangunan seharusnya tidak hanya bertumpu pada peningkatan perekonomian semata, melainkan juga harus melibatkan unsur kebudayaan sebagai hal yang harus diperhatikan. penelitian ini bertujuan melakukan pemetaan ICH agar dapat diketahui potensi pembangunan berdasarkan budaya di setiap provinsi. Selain itu, peneliti juga melakukan pengujian terkait ada/tidaknya autokorelasi/hubungan spasial antarprovinsi. Penghitungan autokorelasi spasial dilakukan dengan menggunakan indeks Moran dengan dua pendekatan bobot spasial. Hasil penelitian menunjukkan bahwa ICH secara signifikan memiliki autokorelasi spasial    ABSTRACT The development of human civilization is part of the result of acculturation and cultural assimilation. Indonesia is home to 1,340 ethnic groups with 2,500 types of languages ​​and a wealth of cultural heritage, both tangible and intangible, which amounts to thousands. Therefore, the invaluable wealth of the country should be maximized into a force to encourage development in Indonesia. The direction of development should not only rely on increasing the economy, but should also involve elements of culture as a matter that must be considered. This study aims to map ICH in order to know the potential for development based on culture in each province. In addition, researchers also conducted tests related to the presence/absence of autocorrelation/spatial relations between provinces. Spatial autocorrelation was calculated using the Moran index with two spatial weight approaches. The results showed that ICH had a significant spatial autocorrelation.
Sistem Informasi Geografis Pemetaan Permainan Tradisional di Indonesia dengan Rapid Application Development Berbasis Website Amini, Raissa; Abdullah, Atje Setiawan; Pradana, Aditya
Jurnal Telematika Vol. 17 No. 2 (2022)
Publisher : Yayasan Petra Harapan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61769/telematika.v17i2.524

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.
Co-Authors Aditya Pradana Aditya Pradana, Aditya Akik Hidayat Amini, Raissa Anggraeni A Armalia Desiyanti Arsa, Muhammad Fadillah Budi Nurani Ruchjana Devi Munandar, Devi Devi Yanti Dhita Diana Dewi Dian Islamiaty Puteri Eddy Hermawan Hamim Tsalis Soblia Hardianto A Husein Hernadi Bahti I Gede Nyoman Mindra Intan Nurma Yulita, Intan Nurma Juli Rejito Kankan Parmikanti Maryanto Rompon Monika, Putri Muhamad Sobari Muhammad Fadillah Arsa Muthalib A Mutia Karimah Nurdeni, Nurdeni Nurul Qisthi Putri Monika Putri Monika Putri Monika Rizka Pradita Prasetya Rolly Maulana Awangga, Rolly Maulana Shailla Rustiana Soetikno, Christophorus