1,721,018 research outputs found
UJI AKTIVITAS ANTIBAKTERI DAN ANTIJAMUR FRAKSI AIR, ETIL ASETAT, DAN N-HEKSAN PADA TANAMAN APU-APU (Pistia stratiotes L)
Full text linkTanaman apu apu (Pistia stratiotes L) biasa digunakan sebagai obat tradisional untuk mengobati demam, batuk rejan, flu, radang, serta penyakit kulit seperti bisul dan eksim. Tujuan dari penelitian ini adalah untuk mengetahui dan menentukan perbandingan aktitivitas fraksi air, etil asetat dan n-heksan tanaman apu-apu terhadap bakteri Propionibacterium acnes, Eschericia coli dan jamur Candida albicans. Metode yang digunakan pada uji aktivitas antibakteri dan antijamur dengan tiga kali pengulangan menggunakan metode cakram kertas. Hasil penelitian menunjukan pada bakteri Propionibacterium acnes dari ketiga fraksi pada bagian tanaman apu-apu yang memiliki zona hambat yang baik terdapat pada fraksi n-heksan dan fraksi etil asetat dengan masing-masing diameter pada daun 7.9±0.95 mm, 3.1±0.36 mm pada batang, dan pada akar 7.2±0.49 mm. Pada bakteri Eschericia coli dari ketiga fraksi pada bagian tanaman apu-apu yang memiliki zona hambat yang baik terdapat pada daun fraksi n-heksan dengan diameter zona hambat 7.3±0.49 mm. Pada jamur Candida albicams dari ketiga fraksi yang memiliki diameter zona hambat yang baik terdapat pada daun fraksi etil asetat dengan besar diameter 2.2±0.88 mm. Kesimpulan penelitian ini adalah pada ketiga fraksi tanaman apu-apu memiliki aktivitas antibakteri dan antijamur yang berbeda-beda terhadap bakteri Propionibacterium acne, Escherichia coli dan jamur Candida albicans, dengan diameter zona hambat terbesar terdapat pada bakteri Propionibacterium acne sebagai gram positif
Forage Development on ex-Coal Mining Land to Support of Livestock Business
Full text linkThe availability of land for forage development is important to support cattle and buffalo production in Indonesia. The government is paying great attention to accelerate cattle and buffalo populations in Indonesia, one of of the Ministry of Agriculture program UPSUS SIWAB to increase cattle and buffalo population has been established. To support this program, sufficient forage and concentrate are crucial. Usually, the development of forage is allocated on the sub-optimal land and one alternative to sub-optimal land is ex-coal mined land. There are several challenges in forage production including pH, the composition of organic matter, low soil microorganisms and heavy metals. These problems can be minimized by adding organic matter, organic fertilizer, microorganism such fungi mycorrhizae and phytoremediation
Evaluasi kandungan mineral pada tanah dan rumput gajah sebagai pakan ternak yang ditanam dilahan bekas tambang batubara
Full text linkPengembangan tanaman pakan ternak (TPT) terkendala ketersediaan lahan, lahan optimal yang ada digunakan pangan, perkebunan. Salah satu lahan suboptimal yang tersedia adalah lahan bekas tambang. Tingkat kesuburan yang rendah serta kandungan logam berat merupakan faktor pembatas lahan bekas tambang. Penelitian ini bertujuan untuk kandungan mineral di tanah dan rumput gajah di lahan bekas tambang batubara. Metode yang digunakan adalah deskriptif. Pengambilan sampel tanah dan rumput gajah diambil dimasing-masing lokasi. Kandungan kimia tanah C organik 1.59-2.35, N total 0.28-0.33, P Bray 2.13-2.8, P HCl 75.36-78.95,Kapasitas Tukar Kation 75.36-78.95, pH H2O 4.21-4.46, Kadar air 2.75-3.39. Kandungan mineral pada rumput gajah yang ditanam di TBA, Pesat dan Pit J yaitu Hg (0.002-0.416)ppm, As 0.002ppm, Pb (0.005-6.251)ppm, Fe (27.083-168.621)ppm, Mg (2047.711-2430.102)ppm, Mn (2047.711-2430.102)ppm. Disimpulkan lahan bekas tambang batubara di Telaga Batu Arang (TBA), Pesat dan Pit J dapat digunakan untuk rumput gajah karena kandungan Hg, As, Pb, Fe, Mg dan Mn dibawah ambang batas yang diijinkan untuk pakan ternak
Desain Multi Input DC-DC Converter Berbasis Sistem Kontrol Cerdas MPPT untuk Multi Tipe Sumber Energi Terbarukan
No full textTantangan utama dalam penerapan sistem hybrid Sumber Energi Terbarukan (EBT) adalah karakteristik tegangan keluaran yang umumnya rendah dan bersifat fluktuatif akibat variabilitas alamiah seperti Photovoltaic (PV) dan Wind Turbine (WT) serta Fuel Cell (FC). Ketidakstabilan tegangan dan kompleksitas dalam pengelolaan aliran daya semakin meningkat, terutama ketika melibatkan multi-input dengan karakteristik yang berbeda. Jaringan DC Bus memainkan peran penting dalam sistem hybrid yang berfungsi sebagai media integrasi utama antara berbagai sumber energi. Oleh karena itu, diperlukan sistem antarmuka converter yang tidak hanya mampu melakukan penguatan tegangan secara signifikan, tetapi juga dapat mempertahankan kestabilan tegangan keluaran dan mengatur distribusi daya secara adaptif dan independen. Tujuan penelitian ini adalah memodelkan dan mendesain arsitektur Multi Input High Step-up DC-DC Converter yang dilengkapi dengan sistem kontrol cerdas berbasis Adaptive Neuro-Fuzzy Inference System (ANFIS), untuk diaplikasikan pada sistem hybrid multi-tipe sumber EBT yang saling terkoordinasi. Dua desain topologi converter yang dikembangkan adalah Ultra-High Step-up DC-DC Converter dan Multi-Input Single Output – Quadratic Boost Converter (MISO-QBC). Sistem kontrol cerdas khususnya pada sistem FC diterapkan untuk mengelola fluktuasi daya input dan beban secara adaptif, sehingga mempertahankan tegangan tinggi keluaran DC Bus dengan stabil. Sistem cerdas Maximum Power Point Tracking (MPPT) juga dirancang menggunakan metode ANFIS yang diimplementasikan pada sumber energi PV dan WT. Metode independen sistem kontrol ANFIS mampu meningkatkan perfomansi jaringan DC-Bus secara efektif, sehingga mampu menjaga tegangan tinggi DC-Bus dan kontinuitas distribusi daya ke beban. Topologi Ultra High Step-up DC-DC Converter mampu menaikkan tegangan sebesar 9 kali, yaitu dari tegangan 45 hingga 400 V dengan toleransi sebesar 2,5%, sedangkan topologi Multi-Input Single-Output Quadratic Boost Converter (MISO-QBC) mampu menaikkan tegangan hingga 24 kali, yaitu dari rentang tegangan 24-54 V hingga menjadi 600 V dengan toleransi sebesar 0,7%. Implementasi algoritma MPPT pada PV dan WT menghasilkan efisiensi sebesar 90% untuk system PV dan 83,6% untuk system WT.
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The main challenge in implementing a hybrid renewable energy source (RES) system lies in the output voltage characteristics, which are typically low, fluctuating, and unstable due to the natural variability of sources such as Photovoltaic (PV) panels, Wind Turbines (WT), and Fuel Cells (FC). Voltage instability and the complexity of managing power flow between sources and loads become more pronounced, especially when the system involves multiple inputs with differing characteristics. The DC Bus network plays a critical role in hybrid RES. A converter is required to increase the voltage, maintain output voltage stability, and manage power distribution to the load adaptively and independently. The purpose of this study is to model and design a Multi-Input High Step-up DC-DC Converter architecture equipped with an intelligent control system based on the Adaptive Neuro-Fuzzy Inference System (ANFIS). Two converter topology designs were developed for implementation in the hybrid system, each serving a specific function: the Ultra-High Step-up DC-DC Converter and the Multi-Input Single-Output Quadratic Boost Converter (MISO-QBC). The intelligent control system, particularly in the FC (Fuel Cell) subsystem, is applied to manage input power and load fluctuations adaptively, thereby maintaining a stable high-voltage DC Bus output. An intelligent Maximum Power Point Tracking (MPPT) system is designed using the ANFIS method and implemented in PV and WT energy sources to optimally extract maximum power
The ANFIS-based independent control method effectively maintains the stability of the DC network, even in the presence of fluctuations in solar irradiation, wind speed, and load power. The DC bus voltage was consistently stable. This method ensures continuous power distribution to the load while maintaining the balance of the hybrid system. The Ultra High Step-up DC-DC Converter topology is capable of increasing the voltage by 9 times from 45 V to 400 V with a tolerance of 2.5%. The Multi-Input Single-Output Quadratic Boosting Converter (MISO-QBC) topology can boost the voltage up to 24 times from 24–54 to 600 V with a tolerance of 0.7%. The implementation of the MPPT algorithm on the PV and WT systems achieved efficiencies of 90% and 83.6%, respectivel
Penerapan Sikap Disiplin Melalui Pembiasaan Shalat Dhuha Pada Anak Usia Dini Di TK Assalam: Penerapan Sikap Disiplin Melalui Pembiasaan Shalat Dhuha Pada Anak Usia Dini Di TK Assalam
Full text linkTo find out how to plan the implementation of dhuha prayer through habituation of dhuha prayer in early childhood in Assalam Kindergarten and know the process of applying discipline through habituation of dhuha prayer in early childhood in Assalam Kindergarten and to know the supporting and inhibiting factors of implementing discipline through habituation of dhuha prayer in early childhood in Assalam Kindergarten. This study uses a qualitative approach with descriptive research type to describe the empirical reality behind the phenomena that occur in Assalam Kindergarten in the application of discipline through habituation of dhuha prayer by explaining a phenomenon that occurs in Assalam Kindergarten as deeply as possible. Based on the results of the initial research obtained from observations in Assalam Kindergarten, that planning for the application of child discipline through habituation of dhuha prayer develops in accordance with expectations. It can be seen from the children who are still running around when the habituation is carried out, there are still children who are cool in their own world, there are children who are still screaming and do not focus on the activities being carried out. Assalam Kindergarten in the application of discipline by habituation of sunnah prayers, the teacher being a good example through continuous guidance and assistance can help instill a disciplined, obedient and orderly attitude to the rules, can help instill commendable morals from an early age and can introduce teachings Islamic teachings from an early age. The role of teachers in schools as role models and good examples greatly influences the smoothness and success of the learning programs carried out, as well as the important role of parents who help guide students at home
Dampak Pola Asuh Orang Tua dalam Membangun Kemandirian Anak (Studi Kasus di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo)
Full text linkPendidikan anak usia dini (PAUD) adalah jenjang pendidikan sebelum pendidikan dasar, yang merupakan suatu upaya pembinaan yang ditujukan bagi anak sejak lahir sampai dengan usia enam tahun. Salah satu lembaga prasekolah adalah Raudlatul Athfal yang membina anak usia 4-6 tahun. Setelah anak memasuki masa itu, anak akan mulai belajar mandiri dan berdiri sendiri lepas pengawasan dari orang tua atau pengasuh. belajar bermasyarakat, menyesuaikan diri dengan kelompok dan mengembangkan keterbukaan. Orang tualah yang memegang peran penting dalam mendidik anak untuk memiliki karakter mandiri. Di lapangan peneliti menemukan adanya siswa yang dalam tanggungjawab menyelesaikan tugas sekolah anak masih kurang mandiri, kurang telaten, tidak sabar, terpengaruh oleh teman, dan asal-asalan, serta kurang mampu dalam mengendalikan uang jajan. Untuk itu, perlunya ditingkatkan kemandirian anak itu melalui implementasi pola asuh orang tua. Dalam penelitian ini, menggunakan metodologi dengan pendekatan kualitatif. Jenis Penelitian ini adalah deskriptif kualitatif dengan rumusan masalah; (1) Bagaimana pola asuh orang tua pada anak di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo?, (2) Bagaimana kondisi kemandirian anak di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo?, (3) Bagaimana dampak pola asuh orang tua pada kemandirian anak di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo?.Dari analisis data dapat disimpulkan bahwa: (1) Pola asuh orang tua yang diterapkan pada anak di RA Muslimat NU 076 adalh pola asuh demokratis. Pengasuhannya diantaranya adalah tidak memaksakan kehendak kepada anak, tidak memberikan kebebasan yang penuh kepada anak, serta mempertimbangkan setiap keputusan anak, memberikan solusi dan masukan kepada anak, (2) Kondisi kemandirian di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo telah dijadwalkan setiap hari, orang tua juga telah mengupayakan kemandirian anak selama di rumah, oleh karena itu sebagian besar anak kemandiriannya sudah baik., (3) Dampak pola asuh orang tua pada kemandirian anak, bahwa sebagian besar orang tua telah menerapkan pola asuh demokratis kepada anak sehingga kemandirian anak di RA Muslimat NU 076 Jalen Ngrukem Mlarak Ponorogo sudah baik
The Interconnection of Huma Betang Values with the Philosophy of Pancasila in the Framework of Islamic Education at the Primary School Level at the Primary School Level
No full textBackround: Islamic education at the primary school level in Indonesia faces the challenge of integrating local cultural values with national ideology to build students’ character and social awareness. Aim: This study aimed to analyze the interconnection between Huma Betang values, rooted in Dayak culture, and the philosophy of Pancasila, and to explore how these values converge in the Islamic education curriculum to foster a generation with strong character and moderation. Method: Using a descriptive qualitative method, the research adopted an exploratory design with a systematic literature review. Relevant literature, including academic books, journal articles, and policy documents, was identified, selected based on defined criteria, and categorized into thematic groups. Data were analyzed through thematic analysis, enabling the identification, coding, and interpretation of recurring themes related to the integration of Huma Betang and Pancasila values in education. The findings revealed a significant convergence between Huma Betang principles—such as mutual cooperation, respect for diversity, and communal harmony—and the core values of Pancasila, including unity, humanity, and social justice. These values were embedded in the Islamic education curriculum through teaching materials, pedagogical strategies, and school activities like discussions, storytelling, and community-based learning. The integration of these values enriched the learning experience, cultivated social responsibility, and promoted tolerance among students, ultimately shaping individuals who are both academically competent and socially conscious. Despite the positive impacts, challenges remain, including limited resources, the need for teacher training, and translating philosophical concepts into practical curriculum implementation. Nonetheless, this integration holds considerable potential for strengthening national identity, preventing radicalization, and fostering an inclusive and harmonious society. Conclusion: the study underscores the importance of systematically incorporating both local and national values into Islamic education curricula at the primary school level to produce graduates with strong moral character and the capacity for social cohesion in a diverse society
DESAIN DAN IMPLEMENTASI MAXIMUM POWER SOLAR TRACKER MENGGUNAKAN PANEL PHOTOVOLTAIC DI KOTA SEMARANG
Full text linkThe 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 light-ing 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 volt-age 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.Keywords: MPPT,Solar Photovoltaic, Tracking
Desain Solar Power Inverter pada Sistem Photovoltaic
Full text linkSolar 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
MODEL SISTEM INFORMASI MONITORING PERKULIAHAN FAKULTAS TEKNIK UNIVERSITAS SEMARANG BERBASIS WEB
Full text linkThe development of Information Technology is increasingly demanding that Higher Education to provide information quickly to meet the needs of Information and Monitoring Course for Lecturers, Students and Admin staff. This study aims to design a Model Information System and Monitoring Course at the Faculty of Engineering, University of Semarang Web-based. Coverage includes lecture planning, lecturing, evaluation of lecturing, control of lecturing and improvement of lecture planning. This research produces an application of Information System and Monitoring model of lecturing which aims to facilitate and accelerate the preparation of time, room and course schedule and ease in monitoring the attendance status of lecturers in class either to students or other parties in real time without having to come to campus check board information . The contribution of this research results will greatly affect the application of science and technology for higher education institutions and to realize the development of Faculty of Engineering Semarang University as a leading Faculty in 2023. The method used is dynamic priorities method which prioritizes the process that has the highest priority and is able to respond to changes in the system environment operate. Modeling the system using XAMPP package in which integrated MySQL module for database purposes, PHP for management of information systems, and Apache for simulation purposes. The results showed the implementation of the application of Information Systems Monitoring System Lectures Faculty of Engineering, University of Semarang goes well
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