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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik 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) Tematik Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Gotong Royong
Titik Nurhayati
Universitas Semarang
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Transportation Other

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Desain dan Implementasi Maximum Power Solar Tracker Menggunakan Panel Photovoltaic di Kota Semarang Harmini, Harmini; Nurhayati, Titik
Elektrika Vol 15, No 2 (2017): Oktober
Publisher : Elektrika

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Abstract

The purpose of this research is to design and implementation Maximum Solar Power Tracking system using photovoltaic panel, in order to increase solar panel efficiency and power. Data collection is done for the condition in Semarang city. The result of the research is expected to be base in planning of solar power system in Semarang city, whether it is for lighting lamp planning and for Solar Home System (SHS). This MPPT system design uses standard 180 degree servo motor to drive photovoltaic panel and control circuit using ATmega IC, while simulation using MATLAB program. Tracking is done by online tracking method by moving the photovoltaic panel to the radiation of the sun. Tracking simulation is done with step 20, 50 and 180 step. The average of voltage generated by system without tracking is 3.97 Volt while the average voltage generated by tracking system is 4.72 Volt. Efficiency between system without tracking and tracking system is 66.28% for tracking system and 78.78% for tracking system
IDENTIFIKASI KANKER PAYUDARA DENGAN THERMAL Titik Nurhayati; Dinar Mutiara K.N; Budiani Destyningtias
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2010): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 1 2010
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Cancer is one of the causes of the main death in South-East Asian countries. Cancer is become 6th rank cause of the death in Indonesia. Around 800,000 Indonesia peoples indicated cancer per year.This research seeks for an alternatif method and tools for indicating breast cancer.The method of this research is using Fluke Thermal Ti20and thermal imager.Keyword : breast cancer, cropping, histogram.
Optimalisasi Pemanfaatan Grid Connected Rooftop Solar Photovoltaic (SPV) Sebagai Pengembangan Green Energy System Harmini Harmini; Titik Nurhayati
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 8 No 1 (2021): Jurnal Ecotipe, April 2021
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v8i1.2135

Abstract

Gedung Fakultas Teknik Universitas Semarang berpotensi untuk dilakukan pemasangan rooftop solar photovoltaic (SPV) sehingga menghasilkan energi listrik dari sumber energi matahari. Energi yang dihasilkan oleh system SPV dapat digunakan untuk mencukupi kebutuhan listrik pada siang hari, sehingga pemenuhan energi listrik dapat dibagi dari PLN dan Rooftop SPV. Pemanfaatan rooftop SPV mempunyai beberapa keunggulan yaitu pemanfaatan energi matahari lebih maksimal dan meminimalisir penghalang karena, serta lebih mudah untuk diintegrasikan dengan sistem kelistrikan yang sudah ada. Perancangan system Rooftop SPV perlu dilakukan untuk mengoptimalisasi pemanfaatan energi matahari sebagai salah satu pengembangan green energy system agar dapat memprediksi berapa daya atau energy yang mampu dihasilkan. Daya dan energy yang dihasilkan oleh grid connected rooftop SPV dihitung berdasarkan data meteorologi radiasi matahari dan temperature Tahun 2019 dari BMKG Kota Semarang serta dimensi luas atap Gedung. Penelitian ini divalidasi dengan menggunakan software PVSYS 6.8.1. Hasil penelitian menunjukkan bahwa kebutuhan daya dan energi sebesar 103.87 kW dan 1371.74 KWh dengan dimensi atap gedung sebesar 441 m2. Atap gedung mampu menampung jumlah modul SPV sebanyak 356 Unit dengan total daya dan energi sebesar 85.119 Kw dan 658.6 KWh. Pemanfaatan grid connected rooftop SPV ini mampu mensupply kebutuhan energi sebesar 81.9% dari total kebutuhan energi listrik pada gedung Fakultas Teknik
The Measurement of the Medical Personnel Emotional Condition In Relation to Service Performance Widhiastuti, Hardani; Kurniawan, Andi; Nurhayati, Titik; Kurniawan, Yudi
Jurnal Psikologi Perseptual Vol 9, No 2 (2024): Jurnal Psikologi Perseptual
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/perseptual.v9i2.13398

Abstract

This study emphasizes on the service performance of medical personnel in hospitals, one of which is due to the emotional condition of the services of the medical personnel. The research method used is quantitative method related to the emotional condition of the medical personnel measured using Vital Sign. The research subjects consisted of 67 medical personnel, but only 50 returned the google forms. While the relationship between the two used SPSS version 22. The validity test showed that the service performance variable was appropriate or valid variable.The result of the statistical analysis of Non Parametric correlation shows that there is relationship with the result of the normality test of p (sig) 0.01. It is proven that the Service Performance variable is not normal, so the test must use the non-parametric correlation test with Spearman-Rho with the correlation coefficient result of 0.562 with p (sig) 0.000. This means that there is significant relationship between the Emotional Condition variable and the Service Performance variable of the medical personnel. The results of this study prove that when the emotional condition of medical personnel increases, the service performance will decrease, which means that the responsibility for service quality decreases somewhat, dares to take risks for services that are slightly neglected, has service goal that is somewhat less attention, less planning for services, less thinking about feedback from the services provided, and the possibility of less thinking about getting the opportunity to realize services.Penelitian ini menekankan pada kinerja pelayanan tenaga medis di rumah sakit yang salah satunya disebabkan oleh kondisi emosional terhadap pelayanan tenaga medis tersebut. Metode penelitian yang digunakan adalah metode kuantitatif yang berkaitan dengan kondisi emosional tenaga medis yang diukur dengan menggunakan Vital Sign. Subjek penelitian terdiri dari 67 tenaga medis, namun yang mengembalikan google form hanya 50 orang. Sedangkan untuk hubungan keduanya menggunakan SPSS versi 22. Uji validitas menunjukkan bahwa variabel kinerja pelayanan merupakan variabel yang tepat atau valid. Hasil analisis statistik korelasi Non Parametrik menunjukkan adanya hubungan dengan hasil uji normalitas p (sig) 0,01. Hal ini terbukti bahwa variabel Kinerja Pelayanan tidak normal, sehingga pengujian harus menggunakan uji korelasi non parametrik dengan Spearman-Rho dengan hasil koefisien korelasi sebesar 0,562 dengan p (sig) 0,000. Hal ini berarti terdapat hubungan yang signifikan antara variabel Kondisi Emosional dengan variabel Kinerja Pelayanan Tenaga Medis. Hasil penelitian ini membuktikan bahwa ketika kondisi emosional tenaga medis meningkat maka kinerja pelayanannya akan menurun yang berarti tanggung jawab terhadap mutu pelayanan agak menurun, keberanian mengambil risiko terhadap pelayanan agak kurang diperhatikan, tujuan pelayanan yang agak kurang diperhatikan, kurang merencanakan pelayanan, kurang memikirkan umpan balik dari pelayanan yang diberikan, dan kemungkinan kurang memikirkan untuk mendapatkan kesempatan dalam merealisasikan pelayanan.
Stability of Dielectric Insulation System in GSUT Transformer of Pertamina Geothermal Energy Lahendong: A Diagnostic Approach Based on DFR (Dielectric Frequency Response) Sianipar, Niko Ardiansa; Nurhayati, Titik; Supari, Supari
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 4 No. 2 (2025): MAY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v4i2.1703

Abstract

Generator Step-Up Transformer (GSUT) is a vital component in the power system that serves to raise the voltage level before the transmission process. The operational reliability of the transformer is highly dependent on the condition of the dielectric insulation system which consists of mineral oil and insulating paper. A decrease in the quality of the insulation system can have a significant impact on the performance and operational life of the transformer. This study aims to analyze the results of Dielectric Frequency Response (DFR) testing on the GSUT Unit 6 Transformer at PGE Lahendong to evaluate the moisture content in insulating paper and the conductivity of transformer oil based on the IEC 60422 and IEC 61620 standard references. The test results based on the dissipation factor (DF) graph show that the moisture content in the insulating paper is 0.9% (dry category) and the oil conductivity is 1 fS/m, which indicates that the condition of the insulation system is still good with an estimated remaining operational life of up to 70 years by calculating the ratio between the average operating temperature value of the transformer and its dielectric rate (Dp.t). However, electromagnetic interference or bushing contamination can cause negative dissipation factor (DF) values, leading to invalid measurements. Therefore, DFR testing using the OMICRON DIRANA device proved effective in monitoring the condition of the dielectric insulation system and providing an accurate estimation of the remaining insulation life, as well as supporting the implementation of predictive maintenance strategies in power transformers.
Pelatihan Dasar Teknik Tenaga Listrik Bagi SMA Kesatrian 2 Semarang Nurhayati, Titik; Destyningtias, Budiani; ISYA ARYAN, ISYA ARYAN SULISTYO; Nurul, Yusuf
Gotong Royong Vol. 2 No. 3 (2025)
Publisher : CV. Akira Java Bulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63935/gr.v2i3.211

Abstract

The distribution system and method of installing electrical installations in Indonesia must follow the rules set by PUIL (General Regulations on Electrical Installations) which was published in 1977, then revised in 1987 and last in 2011. PUIL 2011 is the main technical reference for installing low voltage electrical installations. The purpose of this community service is to provide knowledge to students about the importance of electrical lighting installations in accordance with PUIL regulations to avoid the danger of fire or electric shock. Another goal is to provide knowledge about work safety in installing electrical installations because of the frequent occurrence of work accidents during installation. The problems faced by the community are the lack of knowledge of the community / high school students about (1) Lack of special skills for Kesatrian High School graduates in analyzing electrical problems, especially in electrical lighting installations in accordance with PUIL standards (2) Lack of detailed explanation through a theoretical approach regarding the basic problems of electrical lighting installations for graduates of SMA Kesatrian 2. The training provided is in the form of providing material explanations, regarding the basic legal understanding of electrical installations, Law No. 30 of 2009 concerning Electricity, Government Regulation (PP) No. 25 of 2023 concerning       Electrical Safety Replacing PP No. 10 of 1989 and updating safety standards,” In addition, there is ESDM Ministerial Regulation No. 12 of 2021 concerning Electrical Power Utilization Installations SNI 04-0225-2000 concerning Procedures for planning electrical installations in Buildings. The expected results are that students can read single diagram drawings and wiring diagrams, are able to apply them in practice in the field and indirectly develop a sense of independence. The approach methods offered to solve the partner's problem are (1) providing training to students of Kesatrian 2 Semarang High School about the electrical power installation process, (2) conducting simulations about how to install electrical power.
Analisa Konduktifitas Material Fly Ash dan Bottom Ash sebagai Katoda pada Baterai Udara Pradana, Aditya; Nurhayati, Titik; Pinandita, Satria
Jambura Journal of Electrical and Electronics Engineering Vol 6, No 1 (2024): Januari-Juni 2024
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v6i1.23003

Abstract

Kegiatan distribusi listrik yang dilakukan PLTU Tanjung Jati B yang berlokasi di Kabupaten Jepara menyisakan limbah hasil pembakaran batubara berupa abu fly ash dan botton ash (FABA), dengan tekstur warna abu-abu dan hitam. Limbah FABA hanya dimanfaatkan 30% untuk campuran semen dan sisanya menumpuk terbengkalai. Penelitian ini bertujuan untuk menganalisis konduktivitas pada katoda udara menggunakan material limbah batubara FABA sebagai pengganti dari karbon aktif untuk dimanfaatkan sebagai baterai ramah lingkungan. Penelitian ini merupakan penelitian terapan dengan metode eksperimen. Data penelitian diperoleh melalui eksperimen pengujian di Laboratorium Konversi Energi Listrik Universitas Semarang menggunakan FABA yang diperoleh dari PLTU Tanjung Jati B. Penelitian dimulai dengan pengambilan sampel FABA dari PLTU Tanjung Jati B, penyaringan, dan pengujian konduktifitas dengan variasi Carbon dan Graphite. Berdasarkan pengujian yang dilakukan, ditemukan bahwa baterai udara dengan memanfaatkan fly ash dan grafit dengan tegangan yang dihasilkan sebesar 2,58 V mampu menghidupkan lampu LED selama 4 hari. Untuk meningkatkan besar tegangan yang dihasilkan baterai ditambahkan larutan NaOH dengan perbandingan 1:4:2. (Fly Ash : Grafit : NaOH) Setelah ditambahkan larutan Na2Co3 tegangan meningkat menjadi 2,76 V. Ketiga bahan tersebut (Fly Ash, Grafit, NaOH) direkatkan dengan lem kertas untuk mendapatkan karakteristik kaku, teksturnya halus, cepat kering, luntur, doff, dan dapat menghantarkan listrik. Pengolahan limbah batubara FABA dapat mengatasi permasalahan PLTU Tanjung Jati B dan masyarakat untuk mengurangi penumpukan limbah batubara melalui penciptaan teknologi rekayasa berupa baterai udara.
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

Abstract

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.
Pengenalan Dan Pelatihan Dasar Robotika Bagi Siswa/Siswi SMK PGRI 01 Semarang ISYA ARYAN; Budiani Destyningtias; Titik Nurhayati
Gotong Royong Vol. 2 No. 1 (2025)
Publisher : CV. Akira Java Bulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63935/gr.v2i1.83

Abstract

The introduction and basic robotics training for vocational high school (SMK) students aims to provide a fundamental understanding of robotics concepts that can be applied in industry and technology. This training combines theoretical knowledge and hands-on practice to develop skills in designing, assembling, and programming simple robots. The curriculum includes an introduction to robot components, control systems, and the programming languages used to control robot movements. Using appropriate tools and devices, students are taught how to assemble robots using robotics kits while understanding basic concepts such as sensors, actuators, and logic programming. By the end of the training, students are expected to have a foundational knowledge of robotics that can be further explored for advanced technology studies and enhance their competitiveness in the industry. This robotics introduction also aims to foster student interest and motivation in the fields of technology and engineering, as well as open career opportunities in the rapidly growing technology sector.
Pelatihan Pemanfaatan Baterai Lithium-ion dengan Sistem Manajemen Baterai (BMS) sebagai Solusi Energi Cadangan Yusuf Nurul Hilal; Titik Nurhayati; Budiana Destyningtias; Isya' Aryan S; 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

Abstract

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 Andhika Irawan Andi Kurniawan Andi Kurniawan Nugroho Budiana Destyningtias Budiani Destiningtyas Budiani Destyningtias Dinar Mutiara K.N Eko Wahyu Pramon Fariansyah, Irham Hardani Widhiastuti Harmini, Harmini Harmini, Harmini Istata, Marita Dony ISYA ARYAN, ISYA ARYAN SULISTYO Isya’ Aryan Sulistyo Karnoto Karnoto Nurul, Yusuf Rusliyana Nuarita, Rusliyana Samsuri Samsuri Satria Pinandita Septiani, Tri Asih Sianipar, Niko Ardiansa Sri Heranurweni Supari Supari Supari Supari Supari, Supari Wijayanto, Muhammad Alvis Yudi Kurniawan Yusuf Nurul Hilal