Article Per Year (5 Year)
p-Index From 2019 - 2024
0.61
P-Index
This Author published in this journals
All Journal Jurnal INKOM Jurnal Matematika & Sains Scientific Journal of Informatics Indonesian Journal of Chemistry Jurnal Pertanian Agros Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Agus Subekti
Universitas Jember
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Mathematics

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 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.
Tantangan Revolusi Industri 4.0 bagi Pendidikan di Indonesia Agus Subekti
Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya 2019: Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4903.426 KB)

Abstract

PERUBAHAN REVOLUSIONER DI BERBAGAI SEKTORDunia berubah, cara kerja lama terdisrupsi tanpa bisa terelakkanAda pemain lama tak bisa mendeteksi ancaman di luar jangkauan pemikiran.Ada yang tak berdaya memilih untuk tidak menghadapinya.Ada yang bertengkar sendiri di dalam.Ada yang berinovasi menghadapi tantangan baru.[H. Subiakto, 2018]
KERAGAAN ENAM VARIETAS UNGGUL BARU PADI KHUSUS PADA LAHAN SUB OPTIMAL DI KALIMANTAN BARAT Agus Subekti; Abdullah Umar
Agros Journal of Agriculture Science Vol 25, No 1 (2023): edisi JANUARI
Publisher : Fakultas Pertanian, Universitas Janabadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37159/jpa.v25i1.2426

Abstract

Kebutuhan beras nasional terus mengalami peningkatan seiring dengan pertambahan jumlah penduduk. Selain berfungsi sebagai sumber utama karbohidrat, beras juga menjadi makanan dengan fungsi khusus terutama untuk kesehatan. Konsumsi beras yang memiliki Indeks Glikemik (IG) rendah sebagai makanan pokok dipercaya baik bagi penderita diabetes. Selain itu beras yang memiliki kandungan seng (Zn) dan antioksidan yang tinggi sangat berguna bagi penderita stunting dan gizi buruk. Beberapa varietas unggul baru (VUB) padi khusus hasil inovasi Badan Litbang Pertanian memiliki keunggulan dalam hal aroma, warna, atau kandungan nutrisi untuk mengatasi atau melengkapi kekurangan zat tertentu dalam tubuh. Dengan mempertimbangkan manfaat padi khusus bagi kesehatan, maka perlu dilakukan uji coba VUB padi khusus di Kalimantan Barat. Uji coba ini bertujuan untuk mengidentifikasi keragaan agronomi dan hasil VUB padi khusus pada lahan sub optimal. Metode penelitian menggunakan rancangan acak kelompok, dengan perlakuan berupa enam VUB padi khusus yaitu Arumba, Jeliteng, Baroma, Tarabas, Inpago 13 fortiz, dan Inpari IR Nutri Zinc, dengan lima ulangan. Uji coba Penelitian ini dilaksanakan di Desa Pal IX, Kecamatan Sungai Kakap, Kabupaten Kubu Raya, Kalimantan Barat, dengan jenis tanah Aluvial. Hasil uji coba  menunjukkan bahwa VUB padi khusus Inpari IR Nutri Zinc memiliki produktivitas 4,5 t/ha, produktivitas ini lebih tinggi dan berbeda nyata dibandingkan VUB padi khusus lainnya. VUB padi khusus Inpari IR Nutri Zinc cocok untuk dikembangkan pada lahan sub optimal pasang surut di Kalimantan Barat.
Co-Authors Abdullah Umar Agus Suprianto Ari Setiawan Arif Lukman Aryono Adhi Nurul Priyantari Siswoyo Siswoyo Supriyadi Supriyadi Suryanto, Wiwit Suyoto Suyoto Trio F. Nugroho Wahyudi Wahyudi Zulfikar Zulfikar