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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Komunikasi Fisika Indonesia Emitor: Jurnal Teknik Elektro JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Physics Education Research Journal Physics Communication
Ian Yulianti
Universitas Negeri Semarang
Astronomy Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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FABRIKASI SENSOR SERAT OPTIK PLASTIK UNTUK DETEKSI ION LOGAM MERKURI DALAM AIR Ida Vaeruza; Kukuh Eka Kurniansyah; Faqih Darma; Ian Yulianti
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (172.381 KB) | DOI: 10.31258/jkfi.16.2.123-129

Abstract

The presence of mercury ions is a serious threat to human health and environment. Water consumption containing mercury is very dangerous for human healt. The purpose of this work is to design a heavy metal sensor  ion using plastic optical fiber to detect mercury ions in water. The sensor was fabricated by coating the optical fiber by chitosan through dip-coating technique. There are three diameter of optical fiber sensor that was fabricated, which are 1087.64 μm (sensor A), 1691.64 μm (sensor B) and  1736.33 μm (sensor C). Sensor characterization was done by connected the tip of plastic optical fiber to an LED and the other tip was connected to a photodioda. The results show that sensitivity of sample A is 0.32 mA/ppm, sample B is 0.56 mA/ppm and sample C is 0.64 mA/ppm. In terms of respone time, it is shown that  thr respon time for sensor A, B and C are 22 s, 42.5 s and 86 s respectively.
Pengaruh Jumlah Komputer terhadap Tingkat Radiasi Elektromagnetik dan Dampak Kesehatan Manusia dalam Lingkungan Teradiasi Mohamad Arif Hermawan; Upik Nurbaiti; Ian Yulianti
Emitor: Jurnal Teknik Elektro Vol 21, No 1: Maret 2021
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v21i1.13001

Abstract

Perkembangan teknologi membuat banyak perubahan dalam berbagai bidang dan sektor aktivitas manusia. Penggunaan teknologi seperti komputer yang berlebihan dapat menyebabkan masalah kesehatan yang ditimbulkan karena pada komputer selain menampilkan gambar dan teks pada monitor komputer yang sedang digunakan juga mengeluarkan radiasi dan gelombang elektromagnetik yang tidak dapat dideteksi oleh indra mata. Penelitian ini bertujuan untuk mengetahui pengaruh jumlah komputer terhadap tingkat radiasi elektromagnetik dan dampak Kesehatan. Hasil penelitian tingkat radiasi elektromagnetik yang ditimbulkan oleh beberapa jumlah komputer menunjukkan radiasi elektromagnetik sebesar 0.037 mT sampai 0,051 mT. Tingkat radiasi warung internet di desa Jatibarang dengan jumlah komputer 7 unit masih tergolong aman untuk manusia atau pengunjung warung internet.
Characterization of Temperature Response of Asymmetric Tapered-Plastic Optical Fiber-Mach Zehnder Interferometer Ian Yulianti; Ngurah Made Darma Putra; Fianti Fianti; Abu Sahmah Mohd Supaat; Helvi Rumiana; Siti Maimanah; Kukuh Eka Kurniansyah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 10 No. 1 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v10n1.p34-43

Abstract

Temperature measurement is important in various applications; therefore, various temperature sensors have been developed. Due to its advantages, many optical fiber-based temperature sensors have been proposed. The wavelength modulation-based optical sensor is interesting due to high accuracy. However, the complex fabrication process and high cost limit the advantages of the sensors. Therefore, we proposed a simple and low-cost Mach Zehnder interferometer (MZI) sensor using step-index plastic optical fiber (SI-POF). Performance characterization of the sensor to temperature variation is presented. The sensor consists of two tapers at several distances, forming an interferometer. The first taper was designed to be steep to allow excitation of cladding modes, while the second taper was gradual to suppress power loss. Characterizations were done in terms of sensitivity, hysteresis, and repeatability by analyzing the output spectrums recorded by the spectrometer at various environment temperatures, 35oC to 85oC, with an increment of 10oC. The results showed that the sensor has a sensitivity of 0.0431 nm/oC and a correlation coefficient of 0.9965. Hysteresis of 6.9×10-3 was observed. In terms of repeatability, the sensor shows a maximum deviation, ±3oC, which was mainly resulted from the fluctuation of the oven temperature. Despite its high deviation, the sensor has advantages of simple fabrication, low cost, robust, and low power loss, which make it a good candidate for temperature sensors.
Potensi Limbah Ampas Teh sebagai Alternatif Material Akustik Ramah Lingkungan Ukhti Mutia Munifatuzzahroh; Ian Yulianti; Fianti Fianti
Physics Education Research Journal Vol 3, No 2 (2021)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2021.3.2.8390

Abstract

The research aims to determine the potential of tea waste as an environmentally friendly alternative acoustic material. The acoustic material is made by mixing tea waste powder with fox glue and water, formed, and dried. The acoustic material was made into six samples with different compositions of tea wastes, that were 20 g, 40 g, 60 g, 80 g, 100 g, and 120 g. The value of the effectiveness of noise reduction and the coefficient of sound absorption, both were obtained the most optimum in sample 6 with a composition of 120 g, that were 10.1% and 0.07497 dB. The value of both increases with the increase of the composition of the tea wastes in the acoustic material.
Analisis Nilai Kalor dan Laju Pembakaran Arang Cangkang Buah Karet Siti Hadijah; Azizah Mutiarani; Masturi; Ian Yulianti
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 6 No. 2 (2022): November Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v6i2.787

Abstract

Rubber fruit shells are found as agricultural waste. Many farmers have not used rubber fruit shells. Therefore, the researchers made alternative fuels from rubber fruit shells containing 60-80% cellulose and 5-20% lignin. The research objective was to analyze the calorific value and burning rate of rubber fruit shell charcoal. The combustion rate test is carried out by burning charcoal and measuring how long it takes to turn into ash, and the mass of the burned ash. The heating value is done by making a simple furnace from a can filled with charcoal with a mass of 5g, 10g, 15g, 20g, 25g and 30g. 200ml of water is placed on the stove until it boils, measure the time and temperature when it boils. The result of the longest burning rate is 2.12g / minute. The heating value that results in high temperatures and large coals is 332.4 kJ. The conclusion of this study is that rubber fruit shells which have a large mass are very good to be used as an alternative fuel with a very high combustion rate and calorific value.
Dyeing Jumput Batik Using Clay Media From the Malo Region, Bojonegoro Henny Indah Pratiwi; Fianti Fianti; Ian Yulianti
Physics Communication Vol 7, No 2 (2023): August 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v7i2.41544

Abstract

Indonesian clay, with red color type was one kind of clay with wide distribution and yet to be well managed. The clay can be used as natural coloring material as a substitute for the textile dyes. This study aims to determine the effect of soaking time on the color produced and the effect of clay solution composition on the color produced. The variable used in this research is the variation of the solution composition (1kg/ 1 L, 1kg/ 2L, 1kg/ 3L) and variation of soaking time (24 hours, 48 hours, and 72 hours). The results of the research show that on the solution composition variation obtained the most concentrated color at 1kg/ 1L solution, and at the soaking time variation obtained the most concentrated color at 72 hours with the intensity of light that can penetrate the fabric is very small.
Co-Authors Abu Sahmah Mohd Supaat Azizah Mutiarani Faqih Darma Fianti Fianti, Fianti Helvi Rumiana Henny Indah Pratiwi Ida Vaeruza Kukuh Eka Kurniansyah Masturi Mohamad Arif Hermawan Putra, Ngurah Made Darma Siti Hadijah siti maimanah Ukhti Mutia Munifatuzzahroh Upik Nurbaiti