Laheba, Timothy
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STRATEGI PENGGEMBALAAN REMAJA MELALUI MEDIA SOSIAL Laheba, Timothy; Hermanto, Yanto
BONAFIDE: Jurnal Teologi dan Pendidikan Kristen Vol 5 No 1 (2024)
Publisher : SEKOLAH TINGGI TEOLOGI INJILI SETIA SIAU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46558/bonafide.v5i1.195

Abstract

The role of information technology in church ministry is becoming increasingly important nowadays. One of the technological developments that is currently widely used in church services is social media. This social media is widely used because it can reach many people very quickly and easily. This research was conducted to understand the strategies that can be used by churches to effectively shepherd the youth generation. The teenage generation is a generation that is very close to social media. The teenage generation is at the stage of searching for identity and is very easily exposed to negative content on social media. This is a reason for the church to be present and provide shepherding through social media to them. This research uses a literature study approach to find four factors that influence the quality of shepherding carried out by churches through social media. These factors are the choice of social media used, content shared, human resources involved and continuous innovation. By paying attention to these four factors, it is hoped that the church will be able to overcome challenges and provide more effective shepherding to the younger generation.
OPTIMASI PENGGUNAAN SISTEM HYBRID PANEL SURYA-PLN UNTUK MEMINIMASI BIAYA ENERGI LISTRIK JANGKA PANJANG (STUDI KASUS: 20 TAHUN) Wiranata, F. Edwin; Kristiyani, Ika; Laheba, Timothy
J@ti Undip: Jurnal Teknik Industri Vol 20, No 3 (2025): September 2025
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.20.3.155-162

Abstract

Integrasi panel surya dengan jaringan PLN menjadi salah satu solusi menjanjikan untuk mengurangi ketergantungan energi fosil dan biaya listrik. Namun, penentuan kapasitas panel surya optimal yang mempertimbangkan degradasi efisiensi dan biaya investasi masih menjadi tantangan terutama bagi konsumen rumah tangga yang memiliki luas area terbatas. Penelitian ini bertujuan untuk menghitung kapasitas panel surya optimal yang meminimasi total biaya selama 20 tahun. Metodologi penelitian ini meliputi penentuan parameter sebagai data awal, pemodelan matematika, simulasi untuk optimasi serta analisis sensitivitas. Metode yang digunakan dalam penelitian ini adalah model optimasi non-linear dengan variabel kapasitas panel surya (S), degradasi efisiensi tahunan (0,5%), dan biaya energi PLN (Rp1700/kWh). Analisis dilakukan melalui simulasi numerik untuk berbagai kapasitas S. Pada studi kasus dengan kebutuhan energi 5000 kWh/tahun, kapasitas optimal adalah 4 KWp (26,7 m²), menghasilkan total biaya Rp 48.000.000,- selama 20 tahun (penghematan 71,8% dibandingkan tanpa panel surya). Model ini memberikan kerangka kuantitatif untuk memilih ukuran sistem hybrid yang optimal, dengan sensitivitas terhadap harga panel surya dan degradasi efisiensi. Abstract[Optimization of the Solar Panel-PLN Hybrid System to Minimize Long-Term Electricity Costs: A 20-Year Case Study] Integration of solar panels with the PLN network is a promising solution to reduce dependence on fossil fuels and electricity costs. However, determining the optimal solar panel capacity that accounts for efficiency degradation and investment costs remains a challenge, especially for household consumers with limited land area. This study aims to calculate the optimal solar panel capacity that minimizes the total cost over a 20-year period. The research methodology includes determining parameters as initial data, mathematical modeling, simulation for optimization, and sensitivity analysis. The method used is a non-linear optimization model with variables such as solar panel capacity (S), annual efficiency degradation (0.5%), and PLN energy costs (IDR 1700/kWh). Numerical simulations were conducted for various solar panel capacities (S). In a case study with an energy requirement of 5000 kWh/year, the optimal capacity was found to be 4 KWp (26.7 m²), resulting in a total cost of IDR 48 million over 20 years, which represents a 71.8% savings compared to not using solar panels. This model provides a quantitative framework for selecting the optimal hybrid system size, with sensitivity to solar panel prices and efficiency degradation.Keywords: solar panel; renewable energy; optimization; hybrid