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All Journal Rotasi Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Komunikasi Fisika Indonesia Emitor: Jurnal Teknik Elektro JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Pendidikan Matematika (JUDIKA EDUCATION) Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam UPEJ Unnes Physics Education Journal Journal of Innovative Science Education Indonesian Physical Review Physics Education Research Journal Physics Communication Proceeding Seminar Nasional IPA Jurnal Abdimas JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Ian Yulianti, Ian
Jurusan Fisika, FMIPA Universitas Negeri Semarang, Indonesia Jl. Raya Sekaran Gunungpati-Semarang 50229
Agriculture, Biological Sciences & Forestry Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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The Influence of Lighting on The Bedroom Towards The Sleep Quality of Children Aged 0-5 Years Uding, Risnawati; Fianti, Fianti; Yulianti, Ian
Physics Communication Vol 8, No 1 (2024): February 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v8i1.41318

Abstract

Lighting in the bedroom is important in maintaining the quality of children's sleep. At the age of 0-5 years, a child has a sleep duration of around 11-18 hours, so it is necessary to pay attention to the lighting in the bedroom so that children have quality sleep time. This study aims to determine the effect of lighting in the bedroom on the sleep quality of children aged 0-5 years. Samples were taken randomly with the age range of children 0-5 years with the criteria of children accustomed to sleeping with the lights off as many as 6 samples.  The number of samples was adjusted to the availability of samples around the research site in Tinjomoyo village. Data collection techniques were observation and questionnaires. The parents of the sample filled out the observation sheets and questionnaires. The duration of data collection depends on how many times each sample wakes up during sleep at night, starting when the child falls asleep until 03.00 AM. The results showed that there was an effect of bedroom lighting on the sleep quality of children aged 0-5 years as indicated by a change in the child's total awakening, which is an average of 2 fewer awakenings during sleep from the lights on to the lights off.
Analysis of Kendal Industrial Estate (KIK) impact on the Surrounding Air Quality Cholis, Muhammad Ridwan Nur; Yulianti, Ian; Fianti, Fianti
Physics Communication Vol 7, No 1 (2023): February 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v7i1.41309

Abstract

The Kendal Industrial Area (KIK) is developed to accelerate economic development in the Kendal district area and to support the acceleration and expansion of economic development. Industrialization will lead to a process of air pollution which is marked by 16 companies that are already operating in the KIK area. This research was aimed to analyze the impact of the Kendal Industrial Estate on air quality. The approach of this research used descriptive method, with an analysis of changes in air quality that occurred before the existence of KIK and after the development of industrial areas. The factors that affect the air quality conditions reviewed in this study were air temperature, surface pressure, wind speed, and relative humidity. Data collection techniques used were secondary data NASA satellite imagery. The results showed that there is a change in air conditions after the presence of KIK as indicated by the increase in air pressure and air temperature and the decrease in relative humidity and wind speed. The results indicates that the existence of the Kendal Industrial Area (KIK) causes changes in environmental conditions, but these changes are not significant so they are still within the comfort limits for industrial areas.
Thermal Durability Characterization of a Simple Polymethyl-methacrylate (PMMA) Based-Optical Waveguide Yulianti, Ian; Insan , Shiva Maulana Khoiru; Putra, Ngurah Made Darma; Purwinarko, Aji; Widiarti, Nuni; Ngajikin, Nor Hafizah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 2 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n2.p113-124

Abstract

Polymethyl-methacrylate (PMMA)-based optical waveguide is a good candidate for a simple and low-cost waveguide. However, the thermal properties have not been investigated. In this work, thermal durability characterization of PMMA-based waveguide was carried out. Waveguide fabrication process was done in three stages, which are patterning the PMMA cladding, core material synthetization and core material application to the cladding. Core pattern with cross section area of 1×1 mm2 was engraved on the 4 cm long PMMA sheet. Unsaturated polyester resin (UPR) was used as a core material. Characterizations were conducted for temperature dependent loss (TDL), temperature working range, and long exposure durability. For TDL characterization, the temperature varied from 30°C to 75°C. Meanwhile, for temperature working range, the waveguide was exposed to cycled heating. The thermal durability characterization was done by immersing the waveguide in distilled water at temperature of 40 °C for 288 hours. The results showed that a little change of output intensity occurred due to temperature variation with TDL of 0.0235 dB/°C. The maximum limit of the temperature is 70°C. For long exposure to temperature of 40oC, the results showed that the waveguide has a good performance.
Analisis Nilai Kalor dan Laju Pembakaran Arang Cangkang Buah Karet Hadijah, Siti; Mutiarani, Azizah; Masturi; Yulianti, Ian
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.
FABRIKASI DAN KARAKTERISASI WAVEGUIDE POLYMETHIL METHACRYLATE (PMMA) DENGAN CORE MATERIAL EXPANDED POLYSTYRENE (EPS) DAN UNSATURATED POLYESTER RESIN (UPR) Mufatihah, Nishfa; Yulianto, Agus; Aji, Mahardika Prasetya; Yulianti, Ian
Proceeding Seminar Nasional IPA 2025
Publisher : LPPM UNNES

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

Abstract

Telah dilakukan penelitian dengan karakterisasi dan fabrikasi waveguide berbasis polymethyl methacrylate (PMMA). Material inti yang digunakan adalah Expanded Polyestyre (EPS) dengan Unsaturated Polyester Resin (UPR) sebagai upaya meningkatkan keefisienan waktu dalam fabrikasi waveguide. Fabrikasi waveguide dilakukan dengan memahat PMMA berbentuk lurus dibagian tengah menggunakan computer numerical control (CNC), kemudian diisi material inti dan disambungkan dengan polymer optical fiber (POF) dan ditutup kembali menggunakan PMMA yang belum dipahat. Waveguide difabrikasi dengan variasi konsentrasi EPS dan UPR sebanyak enam variasi konsentrasi.. Karakterisasi dilakukan dengan cara melewatkan cahaya LED berwarna merah dengan panjang gelombang 660 nm ke dalam waveguide. Pengukuran tegangan keluaran pada waveguide dilakukan menggunakan detektor fotodioda yang disambungkan dengan multimeter. Untuk hasil karakterisasi, waveguide yang memiliki loss arus dan tegangan paling kecil adalah waveguide F dengan konsentrasi EPS dan UPR sebesar 70% dan 30%. Waveguide yang memiliki efisiensi dalam pembuatan adalah waveguide A dengan konsentrasi EPS dan UPR sebesar 20% dan 80%.
DESIGN AND CHARACTERIZATION OF A SIMPLE TEMPERATURE SENSOR BASED ON A POLYMER SINE S-BEND OPTICAL WAVEGUIDE STRUCTURE Yulianti, Ian; Hidayah, Rizki Roqissatul; Leonardy, Joshu; Fianti, Fianti; Sunarno, Sunarno; W. P, Wasi Sakti; Utomo, Galih R.; Prayogo, Defrian; Mufatihah, Nishfa
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.511

Abstract

This study presents the design, fabrication, and performance evaluation of a sine S-bend embedded square-core optical waveguide for temperature sensing applications. The waveguide was fabricated using a straightforward and cost-effective CNC milling technique, with PMMA as the cladding and unsaturated polyester resin (UPR) as the core material. Three different bend heights (0.5 cm, 0.6 cm, and 0.7 cm) were investigated to assess their effects on sensor sensitivity, response time, accuracy, and hysteresis. Results showed that increasing the bend height enhanced the sensor sensitivity, with the highest sensitivity of 0.0283 dB/°C achieved at a bend height of 0.7 cm. The response time was consistently maintained at approximately 40 seconds across all samples. The sensor exhibited excellent accuracy, reaching up to 99.31% at a bend height of 0.5 cm. The maximum hysteresis observed was 0.202 % at a bend height of 0.7 cm, indicating stable performance during thermal cycling. These results confirm that the integration of a sine S-bend structure, smooth core surface, and precise waveguide dimensions can significantly improve sensor performance while maintaining a simple and scalable fabrication process.
Utilization Wisdom Local Coast as Context STEM-Based Science Learning in Junior High Schools throughout Tegal Regency Ellianawati, Ellianawati; Subali, Bambang; Dwijananti, Pratiwi; Yulianti, Ian
Jurnal Abdimas Vol. 28 No. 2 (2024): December 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/dc2f4d28

Abstract

Implementation The Independent Curriculum encourages teachers to plan learning that can direct participant educate For Study more broad and deep through environment surrounding areas . Teachers are required For Can develop device learning specifically teaching materials that can accommodate need Study participant educate . Based on results observations and interviews conducted , obtained data that science teachers in Tegal Regency still difficulty in compile teaching materials . This community service activity aims to provide structured training related to the development of teaching materials, integration of local wisdom, and the STEM approach to partners, namely the MGMP IPA Tegal Regency. The community service activity consistsof three stages, namely preparation, implementation, and evaluation. The results of the activity showed that the teachers were enthusiastic and provided positive feedback on the community service activities carried out. The teachers were helped by the training because it increased their knowledge related to local wisdom and the STEM approach, then gained direct experience in compiling teaching materials and LKPD.
Studi Karakteristik Gelombang di Perairan Selat Makassar Menggunakan Model Numerik Spektrum Gelombang Resolusi Tinggi Oktauvan Damyanto, Puguh Dwi; Adiprabowo, Samuel Radityo; Alfahmi, Furqon; Putra, Ngurah Made Darma; Nurbaiti, Upik; Yulianti, Ian
Jurnal Pendidikan Matematika : Judika Education Vol. 8 No. 5 (2025): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/g72mme18

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik gelombang dan swell di Selat Makassar selama tahun 2021 menggunakan model numerik SWAN beresolusi tinggi. Data angin dari GFS dan kondisi batas dari BMKG digunakan untuk simulasi gelombang signifikan, dengan resolusi spasial 0,01°. Hasil simulasi dianalisis secara deskriptif kuantitatif untuk memahami pola spasial dan temporal gelombang. Penelitian ini menunjukkan bahwa dinamika gelombang di Selat Makassar dipengaruhi oleh monsun barat laut dan tenggara, dengan tinggi gelombang signifikan rata-rata dalam kategori rendah (0,5–1,25 meter) selama musim barat laut, dan rendah hingga sedang (0,5–2,5 meter) selama musim tenggara. Arah swell mencerminkan pola monsun dengan kategori dominan tenang (0,1–0,5 meter). Korelasi positif antara kecepatan angin dan tinggi gelombang (koefisien korelasi 0,36) menunjukkan kontribusi angin terhadap pembentukan gelombang, meskipun faktor lain seperti arus laut turut memengaruhi. Hasil penelitian menunjukkan bahwa pola angin, gelombang signifikan, dan swell di Selat Makassar tahun 2021 dipengaruhi oleh dinamika monsun barat laut dan tenggara. Monsun barat laut menghasilkan angin lemah hingga sedang (2–15 knot) dengan gelombang rendah (0,5–1,25 m), sedangkan monsun tenggara menghasilkan angin lebih kuat dengan gelombang rendah hingga sedang (0,5–2,5 m). Swell didominasi kategori tenang (0,1–0,5 m) sepanjang tahun, mengikuti perubahan arah monsun. Simpulan, korelasi antara kecepatan angin dan tinggi gelombang menunjukkan hubungan lemah (r = 0,36), menandakan adanya pengaruh faktor lain seperti arus laut dan swell regional.   Kata Kunci: Gelombang Signifikan, Selat Makassar, Swell, SWAN, Monsun.
Co-Authors Abu Sahmah Mohd Supaat Adiprabowo, Samuel Radityo Agus Yulianto Aji Purwinarko, Aji Alfahmi, Furqon Alvian, Alvian Alvian, Alvian Ani Rusilowati Arista Rahayu, Arista Aryani, Nila Prasetya Aulia Rahman Azizah Mutiarani ‘Ula, Indra Rahmatul Bambang Subali Budi A. Saputa, Budi A. Choeriyah, Hidayatul Cholis, Muhammad Ridwan Nur Dian Wahid Hermawan, Dian Wahid DWI YULIANTI Effendy, Suhardi Effendy, Suhardi - Ellianawati, Ellianawati Erawarni, Dian Falah, Syarifatul Faqih Darma Fariyya, Dewi Raokhil Iklima Fatmala, Rita Iva Fianti Fianti, Fianti Gunawan Dwi Haryadi Hartono Hartono Helvi Rumiana Henny Indah Pratiwi Hermawan, Mohamad Arif Heru Damayanti, Heru Hidayah, Rizki Roqissatul Ida Vaeruza Indra Rahmatul ‘Ula, Indra Rahmatul Insan , Shiva Maulana Khoiru Kukuh Eka Kurniansyah Kurniansyah, Kukuh Eka Laili, Nihla Nurul Leonardy, Joshu Mahardika Prasetya Aji maimanah, siti Masturi Masturi Masturi Masturi Meiarti, Devi Mohamad Arif Hermawan Mosik - Mudhofir, Faiz Mufatihah, Nishfa Mutiarani, Azizah Nadarajan, Nantha Kumar Noor Hidayah Nor Hafizah Ngajikin Nuni Widiarti Nurcahya, Mufid Eska Nurmaya, Eka Ojo Kurdi Oktauvan Damyanto, Puguh Dwi Paminto, Joko Pratiwi Dwijananti Prayogo, Defrian Putra, Ngurah Made Darma Roslan Abdul Rahman Rumiana, Helvi Samin, Pakharudin Mohd Setyono, Anton Siti Hadijah Siti Hadijah siti maimanah Siti Yulia H, Siti Solichah, Solichah Sujarwata Sujarwata, Sujarwata Sukiswo S. E, Sukiswo Sumarli, Sumarli Sunarno Sunarno Sunyoto Eko Nugroho, Sunyoto Eko Supa’at, Abu Sahmah Mohd Susilo Susilo Uding, Risnawati Ukhti Mutia Munifatuzzahroh Ulpha, Ramadhani Andrawina Ummah, Maslahatul Upik Nurbaiti Utomo, Galih R. W. P, Wasi Sakti Wiyanto - Yob, Mohd Shukri