Article Per Year (5 Year)
p-Index From 2019 - 2024
0.61
P-Index
This Author published in this journals
All Journal STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Navigation Physics : Journal of Physics Education Wahana Fisika : Jurnal Fisika dan Terapannya
Sri Endang Wahyuni
Unknown Affiliation
Astronomy Computer Science & IT Earth & Planetary Sciences Education Engineering Materials Science & Nanotechnology Mathematics Physics Other

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Pengaruh Konsentrasi Pemutih Terhadap Intensitas Cahaya dalam Lampu SUHEP Alternatif Penerangan Sri Endang Wahyuni; Puji Suharmanto; Fita Widiyatun
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 4, No 3 (2020)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.892 KB) | DOI: 10.30998/string.v4i3.6198

Abstract

SUHEP lamps are designed as an alternative lighting during the day for a closed room. The research method used in the form of an experiment in the difference in the concentration of bleach in SUHEP lamps to produce lighting that meets the standards of 100 - 250 Lux. Tool for measuring the value of light intensity is a luxmeter and the resistance value at 5 mm and 12 mm LDR using an avometer. The relationship of light intensity with resistance is influenced by several factors namely the smaller the size of the LDR is, the greater value of resistance is because the surface area of the light intensity is getting smaller. Another influencing factor is the greater the room temperature value is, the greater the value of the light intensity is. The comparison of the concentration of bleach to water also shows the greater concentration of bleach is, the smaller the intensity of the light is although this is also very sensitively influenced by the weather. Based on the results of the research it is found that each sample of the light intensity of the SUHEP lamp ranges from 172 - 201 lux and the value of the resistance produced by 5 mm LDR ranges from 800 - 1200 Ohm while by 12 mm LDR, resistance value ranges from 600 - 800 Ohm. From the research results it can be concluded that the ideal concentration between bleach and water in the SUHEP Lamp is 5%: 95% for 201 lux.
Analisis Kemampuan Mahasiswa dalam Pembuatan Kalfis dengan GUI Matlab pada Materi Usaha dan Energi Sri Endang Wahyuni; Fita Widiyatun; Puji Suharmanto
Navigation Physics : Journal of Physics Education Vol 3, No 2 (2021): Navigation Physics : Journal of Physics Education Vol. 3 No. 2 Tahun 2021
Publisher : UNIVERSITAS INDRAPRASTA PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/npjpe.v3i2.817

Abstract

Understanding of the material by students can be seen from the results of the work given. The purpose of this research was to examine, analyse and determine the abilities of student based on the result of the assignments given about making kalfis (physics calculator) for work and energy. The reseach method used is a qualitative method. The result showed that student could understand the material in making kalfis. This can be seen from the kalfis made by students that can be used properly. 
Rekomendasi Teknik Analisis Citra SEM Dengan Menggunakan Free Software ImageJ Neng Nenden Mulyaningsih; Fita Widiyatun; Sri Endang Wahyuni
Wahana Fisika Vol 5, No 2 (2020): December
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v5i2.28021

Abstract

Citra scanning electron microscope (SEM) telah diketahui dapat menghasilkan informasi data morfologi baik secara kualitatif maupun kuantitatif dari suatu sampel dalam skala mikro. Oleh karena itu diperlukan teknik analisis yang tepat dalam mengolah citra SEM untuk mendapatkan data yang akurat. Tujuan dari penelitian yang sudah dilakukan yaitu untuk mendapatkan teknik analisis citra SEM dengan menggunakan free software ImageJ. Citra SEM dari serat agave yang sudah diberi perlakuan dengan perendaman dalam larutan natrium hidroksida (NaOH) 5% selama 30 menit diambil tiga variasi perbesaran yaitu 250x, 500x dan 1000x. Parameter yang dianalisis berupa bentuk dan ukuran region of interest (ROI), nilai rata-rata dan penyimpangan pixel. Bentuk ROI yang dipilih yaitu rectangular, elliptical dan freehand, sementara ukuran ROI-nya masing-masing 100.000, 50.000 dan 25.000 pixel. Hasil analisis menunjukkan bahwa citra SEM dengan perbesaran 1000x pada ROI model freehand dengan ukuran 25.000 pixel mempunyai persentase standar deviasi yang paling rendah (9,325%). Kesimpulannya dalam menganalisis citra SEM dengan menggunakan aplikasi free software ImageJ direkomendasikan memilih gambar dengan perbesaran paling tinggi, bentuk ROI freehand dan ukuran ROI paling kecil.
Co-Authors Fita Widiyatun Fita Widiyatun Mulyaningsih, Neng Nenden Puji Suharmanto Puji Suharmanto