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All Journal Al-Ulum Jurnal Teknik Sipil INDONESIAN JOURNAL OF APPLIED PHYSICS
AHMAD MARZUKI
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Religion Astronomy Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Energy Materials Science & Nanotechnology Physics

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Fenomena Thixotropic Pada Lempung Sensitive Ahmad Marzuki
Jurnal Teknik Sipil Vol 1 No 1 (2017): Jurnal Gradasi Teknik Sipil - Juni 2017
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/gradasi.v1i1.411

Abstract

Prakiraan daya dukung ultimit tiang dilakukan dengan pendekatan teoritis dan aktual dimana pendekatan teoritis dilakukan dengan mengolah data pemeriksaan parameter tanah di lapangan dan atau di laboratorium. Pendekatan daya dukung aktual dilakukan di lapangan dengan menguji langsung kemampuan dukung tiang terhadap penurunannya. Nilai daya dukung dari 2 (dua) pendekatan tersebut tidak selalu sama, hal ini disebabkan perbedaan kondisi parameter tanah pada saat pra-pemancangan dan saat pemancangan. Terjadiya perbedaan kondisi tersebut karena perbedaan tingkat gangguan parameter dukung tanah terhadap beban aplikasi dan fungsi waktu. Beberapa eksperimental di lapangan (Herman wahyudi,1999) memperlihatkan bahwa daya dukung tanah lambat laun bertambah seiring dengan bertambahnya waktu atau dengan kata lain kekuatan tanah cenderung akan kembali sebagian ke keadaan daya dukung sebelum diganggu atau disebut peristiwa thixotropic. Pengamatan peristiwa thixotropic pada lempung, khususnya lempung sensitive sangatlah penting untuk memberi pendekatan dugaan tentang adanya kekuatan lebih dari lempung sensitive setelah diganggu daripada kekuatan lempung sensitive yang mengabaikan pengaruh thixotropic. Pemahaman tentang peranan thixotropi sangat menbantu dalam pendekatan nilai-nilai Safety Factor untuk menghitung daya dukung desain yang berpengaruh pada aspek ekomonis dan kemudahan pelaksanaan dilapangan dan menentukan waktu tunggu jika diperlukan setelah pelaksanaan pondasi dan sebelum pondasi dibebani oleh struktur diatasnya agar mendapatkan daya dukung yang optimal..
Desain Sensor Serat Optik Sederhana untuk Mengukur Konsentrasi Larutan Gula dan Garam Berbasis Pemantulan dengan Menggunakan Konfigurasi Jarak Cermin-Fiber Optik Tetap Arrini Nurul M; Ahmad Marzuki; Mohtar Yunianto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): IJAP VOLUME 03 ISSUE 02 YEAR 2013
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1254

Abstract

A simple method to measure a solution refractive index using fixed mirror refractive optical fiber sensor has been investigated. The solution used are sugar and salt solution, with concentration varies from 1M to 5M. The diameter of polymer optical fiber used is 0.5 mm and light source used is LED (λ=676 nm). The sensor work based on light intensity modulation, sub jected to mechanical structure change of the fiber due to an applied force. The result showed that the concentration of sugar and salt linearly are related with their refractive indeces (R2=0,95006) and (R2=0,99858).
Sensor Fiber Optik Dari Bahan Fiber Optik Polimer Untuk Pengukuran Refractive Index Larutan Gula Nila Wulan Sari; Ahmad Marzuki; Riyatun R
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): IJAP VOLUME 02 ISSUE 02 YEAR 2012
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1286

Abstract

This paper presents an experimental result on developing an optical fiber sensor for measuring refractive index of sugar solution. Sensor was developed using polymer optical fiber with diameter of 3 mm. This sensor is working based on intensity modulation due to reflection. Light coming out from the transmitter optical fiber is reflected by a mirror to the receiver optical fiber. Due to the variation of sugar concentration in solution surrounding this sensor, the way of light entering the fiber receiver depends on the sugar concentration (numerical aperture). It is clear from the experiment that light intensity detected by photodetector (represented by electric voltage) is linearly dependent (R2 = 0.987) on the variation of sugar solution refractive index.
Hubungan antara Media Aplikasi Google Classroom dan Kreativitas Siswa dengan Prestasi Belajar Pendidikan Agama Islam Siswa di Bekasi. Moh Fahri Yasin; Ahmad Marzuki
Al-Ulum Vol. 22 No. 2 (2022): Al-Ulum
Publisher : Institut Agama Islam Negeri (IAIN) Sultan Amai Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30603/au.v22i2.3088

Abstract

 The purpose of this study was to determine the relationship between there is a significant relationship between the google classroom application media and PAI learning achievement, a significant relationship between student creativity, and a significant relationship between the google classroom application media and student creativity together with PAI learning achievements of students in Bekasi. The research method used in this study is survey and correlation methods. In this study the instrument used was a questionnaire primary data and learning outcomes using secondary data.The results of this study are the first, the google classroom application media has a significant relationship with PAI learning achievement. Evidenced by the results of data analysis (t count 5.165 > t table 1.67).KSecond, student creativity has a significant relationship with Islamic education learning achievement. Third, the google classroom application media and student creativity together have a significant relationship with PAI learning achievement.
Co-Authors Arrini Nurul M Moh Fahri Yasin Mohtar Yunianto Nila Wulan Sari Riyatun R