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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Edufisika: Jurnal Pendidikan Fisika Jurnal Psikologi Perseptual Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Pengembangan Rekayasa dan Teknologi Elektrika Jambura Journal of Electrical and Electronics Engineering Muria Jurnal Layanan Masyarakat International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) Jurnal Ilmu Kesehatan MAKIA Electrician : Jurnal Rekayasa dan Teknologi Elektro Tematik Interval: Indonesian Journal of Mathematical Education Jurnal Pembelajaran dan Ilmu Pendidikan Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Gotong Royong Journal of Community Engagement in Health

Titik Nurhayati

Program Studi Teknik Elektro, Universitas Semarang

Author-ID : 3401623

Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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PEMODELAN SISTEM PEMBANGKIT HYBRID ENERGI SOLAR DAN ANGIN Harmini, Harmini; Nurhayati, Titik
Elektrika Vol. 10 No. 2 (2018): Oktober 2018
Publisher : Universitas Semarang

Hybrid energy system is to combine two energy sources that will provide power to the load. Sources of solar energy and wind energy will be used to generate power. In this research will be designed a model of hybrid system of solar energy and wind energy. The system is made equipped with energy storage systems in the form of batteries. Simulation or modeling using a circuit with components appropriate to the field application. Analysis of this system is the performance of hybrid generator characteristics based on load changes in the form of voltage, current and power values. The power generated by the PLTS is 3,000 Watts and the wind generator is 1,000 Watt with a resistive load of 4,000 Watt. Hybrid system generates a power of 2640 Watt so that the efficiency of hybrid system by 66%Keywords: Hybrid system, wind energy, solar energy

SIMULASI PH AIR UNTUK AIR BOILER DAN AIR CHILLER PADA MESIN PRODUKSI REFRIGERATOR DENGAN MENGGUNAKAN LOGIKA FUZZY Irawan, Andhika; Heranurweni, Sri; Nurhayati, Titik
Elektrika Vol. 11 No. 1 (2019): April 2019
Publisher : Universitas Semarang

The need for water is very important for the production process, the water quality must also be considered the pH value so that the water is suitable for use in boilers or chillers. Seeing from these needs a simulation was made on matlab R2017a using a fuzzy toolbox that can find out the water quality with fuzzy mamdani method. This fuzzy logic simulation can determine the standard value of boiler water pH (10.5-11.5) and the standard pH value of chiller water (6-8) in the production machine. The methods in fuzzy logic used are mamdani and centroid methods as deffuzification with R2017a matlab simulation tool. The fuzzy inference system used is the mamdani method. This study made a simulation of mamdani method that can determine the quality of the PH water produced by using fuzzy logic. Chiller water pH can be used if iron ion values (0-2 ppm), silica ions (50-150 ppm), Total Dissolved Solid (TDS) (500-1000 ppm), total Hardness (100-200 ppm), M-alkalinity (500-750 ppm) from the standard value, the pH of the chiller water can be proven to reach a water pH value of 6-8. Boiler water pH can be used if iron ion values (0-2 ppm), silica ions (100-150 ppm), Total Dissolved Solid (TDS) (2000-3500 ppm), total Hardness (0-3 ppm), M-alkalinity (700-800 ppm) from the standard value, the pH of boiler water can be proven to reach a water pH value of 10.5-11.5.Keywords: fuzzy logic, Mamdani method, pH of boiler water

Desain Solar Power Inverter pada Sistem Photovoltaic Harmini, Harmini; Nurhayati, Titik
Elektrika Vol. 12 No. 1 (2020): April 2020
Publisher : Universitas Semarang

Solar power inverter is one of the main components in the PLTS system in order to produce the power or energy needed by the load. Solar power inverter is used to convert from DC energy (Direct Current) to AC (Alternating Current) to load. In this research a simulation of a solar power inverter system on a photovoltaic system will be designed. Simulation is done using SIMULINK-MATLAB software. Solar power inverter is designed using a boost converter as a controller and a Full-Bridge Inverter. Boost Converter is designed from 12VDC - 17 VDC to 300 VDC. Full Bridge Inverter produces AC voltage of 240 VAC with modulation index 0.8 and frequency 60 Hz. Total Harmonic Distortion is 46.07%. Power of Photovoltaic Solar panels generated at 3500 Watts at 1000 Watt / m2 irradiation conditions and temperature temperatures of 25 degrees Celsius.

Pendekatan Diagnostik Dielectric Frequency Response (DFR) dan Water Content Dalam Mengidentifikasi Anomali Tan Delta yang Melebihi Standar Cigré TB 445 Pada Pengujian Transformator Daya Wijayanto, Muhammad Alvis; Supari; Nurhayati, Titik
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i5.58756

Keandalan transformator daya bergantung pada kondisi isolasi, di mana tan delta >1% (CIGRE TB 445) mengindikasikan degradasi. Namun, penyebab spesifik anomali ini seringkali tidak terdiagnosis secara holistik. Tujuan dari penelitian ini adalah untuk menyelidiki penyebab tan delta tinggi melalui integrasi pengujian DFR dan water content pada transformator 80 MVA berusia 20 tahun. Pengujian tan delta (GST-g, UST), DFR, dan Karl Fischer untuk water content, diikuti analisis komparatif terhadap standar. Nilai tan delta 1,0509% disebabkan degradasi oli (water content 28,56 ppm), meskipun kertas isolasi kering (1,8%) dan konduktivitas oli optimal (4,1 pS/m). Penelitian ini menekankan pentingnya kombinasi DFR-water content untuk diagnosis akurat dan merekomendasikan purifikasi/regenerasi oli sebagai mitigasi. Temuan ini mendorong pengembangan model prediktif dan evaluasi oli alternatif dalam penelitian selanjutnya.

Exploring Ethnomathematics in Traditional Dance Movements: A Study of the Sigeh Penguten Dance of Lampung, Indonesia Desmawati, Riana; Nurhayati, Titik; Ulbana, Fatimatuz Zahro; Jayaningrat, Raden Hari W
Interval: Indonesian Journal of Mathematical Education Vol. 3 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/ijome.v3i2.2779

Purpose of the study: This study aims to determine ethnomathematics activities and mathematical concepts applied in various Sigeh Pengeten dance movements. Methodology: The type of research used in this study is qualitative research with an ethnographic approach. Data were obtained through interviews, observation, and documentation. The research instruments consisted of the primary instrument, the researcher herself, and supporting instruments in the form of interview guidelines, observation sheets, and documentation tools. Method and source triangulation were used to validate the data. Main Findings: The results of this study indicate that in each sigeh penguten dance movement, counting activities are implemented by adjusting the fast or slow music beat in the form of a repetition of 1 x 8 counts. Some sigeh penguten dance movements implement measuring activities when the movement moves to adjust to the next floor pattern change. The concept of one-dimensional geometry is depicted from the movement that forms a straight line floor pattern. The concept of two-dimensional geometry is depicted from the shape of the floor pattern in the form of triangles, rectangles, squares, trapezoids, and circles. Reflection and rotation geometric transformations. The conclusion of this study is that in the sigeh penguten dance movements there are mathematical activities and mathematical concepts. Novelty/Originality of this study: This research can be used as input for educators to make ethnomathematics an alternative in the mathematics learning process, so that it can help improve learning outcomes and students' interest in mathematics learning.

Hubungan Antara Pola Asuh Orang Tua Dengan Kesehatan Mental Pada Remaja Di SMK Negeri 1 Kanor Julianto, Errix Kristian; Nurfitriani, Yuzita; Nurhayati, Titik
Jurnal Ilmu Kesehatan MAKIA Vol 15 No 1 (2025): Jurnal Ilmu Kesehatan MAKIA
Publisher : LPPM ISTeK ICsada Bojonegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37413/ky9n9b30

Masa remaja merupakan masa transisi antara kanak-kanak dan dewasa yang mana akan mengalami perkembangan fisik, kognitif, maupun psikososial yang cepat. Hal ini dapat mempengaruhi mereka berpikir, membuat keputusan, dan berinterkasi dengan lingkungan di sekitarnya. Sehingga masalah kesehatan mental paling banyak dialami oleh remaja. Salah satu faktor yang dapat mempengaruhi kesehatan mental remaja adalah pola asuh orang tua. Tujuan penelitian ini untuk mengetahui hubungan antara pola asuh orang tua dengan kesehatan mental pada remaja di SMK Negeri 1 Kanor. Desain penelitian ini menggunakan metode kuantitatif dengan pendengkatan cross sectional. Populasi terdiri dari kelas X di SMK Negeri 1 Kanor berjumlah 234 siswa. Sampel pada penelitian ini diambil dengan cara simple random sampling 47 responden. Analisa data menggunakan uji Chi-Square. Data dianalisis dengan uji chi-square. Hasil penelitian berdasarkan uji chi-square didapatkan ?-value 0,031 yang mana ? value < ? 0,05. Artinya ada hubungan antara pola asuh orang tua dengan kesehatan mental pada remaja di SMK Negeri 1 Kanor. Dan diartikan bahwa terdapat hubungan yang signifikan dengan kemungkinan terjadi secara kebetulan relatif rendah, yaitu > 5%. Kesimpulan dalam penelitian ini adalah semakin baik pola asuh orang tua, maka semakin baik juga kesehatan mental pada remaja, begitu sebaliknya.

Pelatihan Pemanfaatan Baterai Lithium-ion dengan Sistem Manajemen Baterai (BMS) sebagai Solusi Energi Cadangan Hilal, Yusuf Nurul; Nurhayati, Titik; Destyningtias, Budiana; Aryan S, Isya'; Harmini
Muria Jurnal Layanan Masyarakat Vol. 8 No. 1 (2026): Maret 2026
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/mjlm.v8i1.16592

This community service activity aims to equip 15 participants at SMK Muhammadiyah 2 Jepara with technical competencies in assembling a backup energy system. The novelty of this article lies in the application of Lithium-Ion battery technology integrated with a smart Battery Management System (BMS) as a more efficient and safer power storage solution compared to conventional lead-acid batteries, as well as the implementation of a hands-on training method. This five-hour program successfully guided participants through the process of assembling Lithium-Ion battery cells and integrating them with a BMS to achieve optimal functionality. The results demonstrate that the assembled battery unit, when connected to an inverter, is capable of providing a stable power supply to various electronic loads, including mobile phone chargers, laptops, and active speakers. The final conclusion of this activity is that the participants have successfully mastered modern energy storage technology while producing a functional backup energy system ready to support emergency electrical needs within the school environment.

Co-Authors Aditya Pradana, Aditya Andi Kurniawan Andi Kurniawan Nugroho Aryan S, Isya' aryan, isya Budiani Destyningtias Budiani Destyningtias Desmawati, Riana Destiningtyas, Budiani Destyningtias, Budiana Dinar Mutiara K.N Fariansyah, Irham Hardani Widhiastuti Harmini Harmini Harmini Harmini, Harmini Hilal, Yusuf Nurul Irawan, Andhika Istata, Marita Dony ISYA ARYAN, ISYA ARYAN SULISTYO Jayaningrat, Raden Hari W Julianto, Errix Kristian Juliartadi, Hendra Ady Karnoto . Nurfitriani, Yuzita Nurul, Yusuf Rusliyana Nuarita, Rusliyana Samsuri Samsuri Satria Pinandita Septiani, Tri Asih Sianipar, Niko Ardiansa Sri Heranurweni Supari Supari Supari, Supari Ulbana, Fatimatuz Zahro Wahyu Pramon, Eko Wijayanto, Muhammad Alvis Yudi Kurniawan

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