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All Journal Jurnal Ilmu Komputer dan Informasi Jurnal INKOM Jurnal Matematika & Sains Scientific Journal of Informatics BULLETIN OF THE MARINE GEOLOGY Indonesian Journal of Chemistry JURNAL INSTEK (Informatika Sains dan Teknologi) Budimas : Jurnal Pengabdian Masyarakat InSTEM
Agus Subekti
Universitas Jember
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mathematics Physics Social Sciences Other

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 1 
Temperature Dependent of The Forbidden Energy Gap of GaSb Grown by MOCVD Agus Subekti
Jurnal Matematika & Sains Vol 5, No 1 (2000)
Publisher : Institut Teknologi Bandung

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

Abstract

This work reports on the investigation of the temperature dependent of the forbidden energy gap of GaSb. The GaSb samples were grown by MOCVD technique using trimethylgallium (TMGa) and trimethylantomony (TMSb) as the precursors. The temperature dependent of the energy gap was obtained from a plot of the square of absorption coefficient versus photon energy at temperature range of 10-300K follows the equation , wich in good agreement with results previously reported in the literatures.
Perancangan dan Implementasi Mapper dan Demapper untuk DVB-T Suyoto Suyoto; Agus Subekti; Arif Lukman
INKOM Journal Vol 5, No 2 (2011)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.152

Abstract

Pada penelitian ini dilakukan perancangan dan implementasi mapper dan demapper untuk DVB-T (Digital Video Broadcaster-Terrestrial). Mapper digunakan untuk memetakan deretan bit digital kedalam symbol-simbol OFDM yang akan masuk ke IFFT, sedangkan demapper digunakan untuk memetkan simbol-simbol OFDM yang keluar dari FFT ke dalam deretan bit digital. Mapper dan demapper menggunakan konstelasi 16 QAM (Quadrature Amplitude Modulation). 4 bit digunakan untuk memetakan setiap simbol OFDM. Perancangan dilakukan dengan menggunakan ISE 9.2i Xilinx. Hasil dari perancangan diimplementasikan pada virtex-4 development board.
ELECTROPOLYMERISATION AND CHARACTERISATION OF DOPED-POLYPYRROLE AS HUMIDITY SENSOR Siswoyo Siswoyo; Trio F. Nugroho; Zulfikar Zulfikar; Agus Subekti
Indonesian Journal of Chemistry Vol 6, No 2 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.256 KB) | DOI: 10.22146/ijc.21759

Abstract

A new type of sensing materials for humidity measurement has been developed based on conducting polymer polypyrrole synthesised from pyrrole by adding some dopant compounds, bromide and chloride, it is prepared by potentiodynamic-electropolymerisation technique. Variation of dopant types and concentration has been carried out in order to investigate the effect of this variation to the change of polymeric conductivity when interacting with water vapour. Polypyrrole-Cl (Ppy-Cl) and polypyrrole-Br (Ppy-Br) exhibit a good principal characteristic as sensor candidate namely responding proportionally to humidly variation ranging 30% - 90% relative humidity. Characterisation test for the sensor candidates has been carried out for evaluating their linearity respond toward humidity, their stability in certain period and their reproducibility in some tests. The results show that Ppy-Cl and Ppy-Br showing good linearity respond with R value in a range of 0.95 - 0.99. Their reproducibility and sensitivity were relatively good, however their respond stability were only last in few days. The stability probably is related to the stability of resulted polymeric structure that very affected by synthesis process and dopant used. It is necessary to extend the use of other dopant materials and changing the synthesis process in order to improve sensor stability. In other hand it is also necessary to characterise other performance characteristic of the sensor namely response time, and interference effect of some volatile chemicals and other gases.
Inverse Modeling Using Taylor Expansion Approach and Jacobi Matrix on Magnetic Data (Dyke/Magma Intrusion Cases) Agus Suprianto; Wahyudi Wahyudi; Wiwit Suryanto; Ari Setiawan; Aryono Adhi; Nurul Priyantari; Supriyadi Supriyadi; Agus Subekti
Scientific Journal of Informatics Vol 6, No 2 (2019): November 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i2.19798

Abstract

The mathematical modelling of geological structures, i.e. magma intrusion or dyke, has been done,  based on magnetic data with inversion techniques using MatLab. The magnetic equation is a non-linear equation, and completion is done using a linear approach to non-linear mathematical models of magnetic data using the Taylor expansion approach and Jacobi Matrix. The first step of this research is to make synthetic data forward modelling from the magnetic equation of magma intrusion or dyke cases without errors, and the next stepping then add errors to the data. The next step is to do an inversion to get the parameters sought, i.e. depth and angle of the magma intrusion, by giving initial guesses, and then re-correct iteratively until convergent results are obtained. Finally, parameters of slope dyke or thin magma intrusion and its depth can be determined. The results obtained indicate that this technique can be used to get physical parameters sought from magnetic data for simple geological cases, i.e. dyke and magma intrusion.
EXPLORING MARINE GEOLOGY AND OCEANOGRAPHY IN MANGGAR WATERS: A PRELUDE TO THE BURGEONING BELITONG GEOPARK F.X. Harkins H. Prabowo; Luli Gustiantini; Marina I. Siti; Fauzi Budi Prasetio; Yuli Yulianah; Catur Purwanto; Yusuf Adam Priohandono; Sonny Mawardi; Godwin Latuputty; Prisca Ayu Wastuwidyarani; Adi C. Sinaga; Swasty Aninda Piranti; Ferry Siboro; Agus Subekti; Sahudin Sahudin
BULLETIN OF THE MARINE GEOLOGY Vol 38, No 2 (2023)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.38.2.2023.859

Abstract

A survey on marine geology and oceanography was conducted in Manggar Waters, East Belitung, in order to protect the geological heritage of the newly inaugurated Belitong UNESCO Global Geopark (UGGp) in 2021. This study is aimed at understanding the characteristics of the seabed, marine sediments, currents, and coastal features in the area. A bathymetrical survey was done using an Echotrac echosounder to measure water depths, and current measurements were taken with an Infinity device. Forty sediment samples were collected and analyzed for their characteristics. The coastal features were examined through direct observation, and an unmanned aerial vehicle (UAV) drone was used to investigate the morphology of small islands. The results showed that the seabed was mainly composed of coarse sediments, such as sand and clayey sand, with some areas containing gravel near Buku Limau Island. The microfauna foraminifera analysis indicated a relatively low diversity, with Operculina and Amphistegina being the dominant species. Two types of beaches were recognized: the northern part, consisting of rocky beaches made of igneous rocks, and the southern part, which has flat beaches made of beach alluvium deposits. Abrasion was found to be dominant in the southern part, particularly at Tambak Beach. The study provides valuable information for the planning and management of marine areas in the Belitong Geopark. It also highlights the importance of preserving and protecting the geological heritage of the region. With this newfound knowledge, stakeholders can make cognizant decisions to ensure the conservation of the Belitong Geopark and its unique geological features.
Emprowering The PKK Team in Pecoro Village, Rambipuji, Jember, Through The Production of Organic Fertilizer From Household Waste. Supriyadi; Bowo Eko Cahyono; Agus Subekti; Siswanto
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 1 No. 1 (2023): Mei
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v1i1.349

Abstract

The empowerment PKK team in Pecoro Village, Rambipui District, Jember Regency has been carried out through organik fertilizer from household waste. The purpose of this activity is to empower PKK women to use household waste into products that can be used. The activity is carried out through lecture / counseling activities, mentoring and the practice of processing organik waste into compost. As a result, the level of awareness of PKK mothers and the community about waste management has increased, and is able to add additional cash and income.
PENDETEKSIAN POTENSI FAKTOR RISIKO TINGGI KESEHATAN JEMAAH HAJI MENGGUNAKAN ALGORITMA KLASIFIKASI DATA MINING ARIF BUDIARTO; AGUS SUBEKTI; HARIS DARMAWAN
Jurnal INSTEK (Informatika Sains dan Teknologi) Vol 7 No 2 (2022): OCTOBER
Publisher : Department of Informatics Engineering, Faculty of Science and Technology, Universitas Islam Negeri Alauddin, Makassar, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/instek.v7i2.32554

Abstract

Menurut Peraturan Menteri Kesehatan nomor 15 tahun 2016, Ibadah haji adalah ibadah fisik, oleh karena itu Jemaah Haji dituntut mampu secara fisik dan rohani, sehingga dapat melaksanakan ibadah haji dengan baik dan lancar. Berkaitan dengan kondisi tersebut ilmu data mining diperlukan untuk mengklasifikasi pendeteksian potensi faktor risiko tinggi kesehatan Jemaah Haji. Model klasifikasi yang digunakan bertujuan untuk memperoleh akurasi yang tepat dalam pendeteksian potensi faktor risiko tinggi kesehatan Jemaah Haji. Dataset yang digunakan adalah dataset pemeriksaan kesehatan Jemaah Haji. Berdasarkan perhitungan confusion matrix yaitu accuracy, precision, recall dan AUC. Hasil penelitian membuktikan bahwa algoritma klasifikasi whitebox mampu memberikan klasifikasi yang baik dalam upaya pengendalian faktor risiko tinggi bagi kesehatan Jemaah Haji.
Improving Classification Performance on Imbalanced Medical Data using Generative Adversarial Network Siska Rahmadani; Agus Subekti; Haris, Muhammad
Jurnal Ilmu Komputer dan Informasi Vol. 17 No. 1 (2024): Jurnal Ilmu Komputer dan Informasi (Journal of Computer Science and Informatio
Publisher : Faculty of Computer Science - Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21609/jiki.v17i1.1177

Abstract

In many real-world applications, the problem of data imbalance is a common challenge that significantly affects the performance of machine learning algorithms. Data imbalance means each target of classes is not balanced. This problem often appears in medical data, where the positive cases of a disease or condition are much fewer than the negative cases. In this paper, we propose to explore the oversampling-based Generative Adversarial Networks (GAN) method to improve the performance of the classification algorithm over imbalanced medical datasets. We expect that GAN will be able to learn the actual data distribution and generate synthetic samples that are similar to the original ones. We evaluate our proposed methods on several metrics: Recall, Precision, F1 score, AUC score, and FP rate. These metrics measure the ability of the classifier to correctly identify the minority class and reduce the false positives and false negatives. Our experimental results show that the application of GAN performs better than other methods in several metrics across datasets and can be used as an alternative method to improve the performance of the classification model on imbalanced medical data.
PEMBERDAYAAN EKONOMI MASYARAKAT DESA MELAUI PELATIHAN MANAJEMEN UNTUK UMKM DAN PENGENALAN TEKNOLOGI DENGAN PELATIHAN ECOPRINT DI DESA NGEMPLAK, SUKOHARJO Suprihati; Sri Lestari Yuli Prastyatini; Rukmini; Budiyono; LMS Kristiyanti; Fany Nur Zabrina; Merliana Dewi Astuti; Agus Subekti
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol. 7 No. 2 (2025): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v7i2.17898

Abstract

Kuliah Kerja Nyata (KKN) adalah program akademik yang wajib diikuti oleh mahasiswa sebagai bagian dari kurikulum pendididkan tinggi. Program ini bertujuan untuk memberikan pengalaman belajar yang nyata dan aplikatif bagi mahasiswa dalam menerapkan teori dan konsep yang telah dipelajari di bangku kuliah. Salah satu kegiatan dalam KKN ini ialah memberikan pelatihan ecoprint di desa Ngemplak, Kecamatan Kartosuro, Kabupaten Sukoharjo, Provinsi Jawa Tengah. Pelatihan ecoprint ini bertujuan untuk meningkatkan kemampuan dan pengetahuan pelaku UMKM dalam menghasilkan produk yang ramah lingkungan dan memiliki nilai ekonomis. Metode yang dilakukan pada pelatihan berupa metode pendampingan. Analisis permasalahan dari pelaku UMKM di desa Ngemplak belum dikenalkan ecoprint yang dapat digunakan sebagai alat Pendidikan untuk mengajarkan konsep-konsep alam dan kreativitas. Hasil dari pelatihan ecoprint dapat membantu menyelesaikan masalah dalam peningkatan pendapatan, mengurangi biaya produksi, mengurangi limbah dan meningkatkan kesadaran lingkungan .
Co-Authors Adi C. Sinaga Agus Suprianto Ari Setiawan Arif Budiarto Arif Lukman Aryono Adhi BUDIYONO Cahyono, Bowo Eko Catur Purwanto F.X. Harkins H. Prabowo Fany Nur Zabrina Fauzi Budi Prasetio Ferry Siboro Godwin Latuputty Haris Darmawan LMS Kristiyanti, LMS Luli Gustiantini Marina I. Siti Merliana Dewi Astuti MUHAMMAD HARIS Nurul Priyantari Prisca Ayu Wastuwidyarani Rukmini Sahudin Sahudin Siska Rahmadani Siswanto Siswoyo Siswoyo Sonny Mawardi Sri Lestari Yuli Prastyatini Suprihati Supriyadi Supriyadi Supriyadi Suryanto, Wiwit Suyoto Suyoto Swasty Aninda Piranti Trio F. Nugroho Wahyudi Wahyudi Yuli Yulianah Yusuf Adam Priohandono Zulfikar Zulfikar