38 research outputs found
LAYANAN KUALITAS TINGGI GEOLOKASI: KAJIAN LITERATUR
No full textThe rapid development of the field of basic science and engineering sciences (engineering) has produced new technology as a solution to overcome complex and complicated problems. The magnitude changes experienced by primary cartography have turned into digital cartography, so the presence of cartographic maps in the form of GPS has become a current trend. The technological revolution in presenting geographic data has been accommodated as the main challenge of geography in the 21st century. The existence of geographical space has received abundant progress from computer technology, satellite and internet networks, automation, so that the performance of space equipped with facilities has resulted in high quality geolocation services. The potential of geolocation in various platforms has been enjoyed by various residents, starting from Google Maps with technology that becomes a tool and is very important for storing, manipulating, analyzing and displaying natural conditions with the help of data and spatial attributes. High quality geolocation services have been enjoyed by residents through various social media platforms (such as twitter, instagram, facebook, youtube, tiktok and so on), so that all forms of communication have been conveyed quickly and very meaningfully. In the economic field, high quality geolocation services have provided information ranging from sourcing of goods, distribution (courier) and marketing
Pengaruh Overhaul Terhadap Efektifitas Kondensor Di PT. Indonesia Power Up Suralaya Unit III
No full textIn the power plant there are important component, it is condenser. A condenser has function to condense LP turbine exhaust vapor foe condensation.This time the author this time only includes calculations,to find out the total heat transfer using the log mean temperature Difference (LMTD) Method and Number Of Transfer Unit(NTU) in condenser unit III. Inthis research method the author can describe the heat transfer in the condenser what happens before andafter overhaul. It is expected that the resultsof the condition after overhaul must be better than before the overhau.The value of the condenser efficiency calculation of the effectiveness before and after overhaul experienced the highest increase on day 4 from 65.6% to 73.5% increase in condenser efficiency of 7.83%
Pengaruh Overhaul terhadap Efektifitas Kondensor di PT. Indonesia Power Up Suralaya Unit III
No full textIn the power plant there are important component, it is condenser. A condenser has function to condense LP turbine exhaust vapor foe condensation.This time the author this time only includes calculations,to find out the total heat transfer using the log mean temperature Difference (LMTD) Method and Number Of Transfer Unit(NTU) in condenser unit III. Inthis research method the author can describe the heat transfer in the condenser what happens before andafter overhaul. It is expected that the resultsof the condition after overhaul must be better than before the overhau.The value of the condenser efficiency calculation of the effectiveness before and after overhaul experienced the highest increase on day 4 from 65.6% to 73.5% increase in condenser efficiency of 7.83%
Performance Evaluation and Optimization of Chiller Systems: A Data-Driven Approach to Enhancing Energy Efficiency
No full textChiller systems account for a significant portion of energy consumption in industrial and commercial HVAC operations, often exceeding 50% of total power usage. However, inefficiencies such as elevated condenser pressure, inadequate heat transfer, and excessive compressor workload contribute to increased energy demand. This study presents a comprehensive performance evaluation of water-cooled centrifugal chiller systems based on 30 operational test scenarios. Key efficiency indicators—including Coefficient of Performance (COP), Specific Energy Consumption (SEC), and isentropic efficiency—were analyzed to identify performance gaps. The results revealed COP values ranging from 1.92 to 4.07, with an average between 2.8 and 3.2, indicating suboptimal performance relative to industry benchmarks (COP > 4). SEC values between 1.07 and 1.25 kW/ton further highlight opportunities for energy optimization. High condenser pressure (>7.5 barg) and negative subcooling (-4.1 K to 0 K) were identified as major contributors to inefficiency. The study emphasizes that optimizing water flow rates and maintaining proper heat exchanger conditions can significantly improve system performance. Unlike previous research relying on AI or IoT-based diagnostics, this work adopts a practical, data-driven approach, offering actionable insights for facility managers seeking to enhance energy efficiency and operational reliability
Pengaruh Kualitas Website BPS Kab. Siak Terhadap Kepuasan Pengguna Website Menggunakan Metode Webqual 4.0
No full textThis study aims to determine the influence of website quality of BPS Kab. Siak to the satisfaction of website users. In this study the quality of the website is measured by using webqual method. Webqual variables are independent variables consisting of ease of use, quality of information and quality of service interaction. The dependent variable is user satisfaction. The research method used in this research is quantitative correlation method. Sample selected from population of website user of BPS Kab. Siak, calculated using Slovin formula with 10% significance. To test the effect of the independent variable on the dependent variable using multiple linear regression analysis. This research resulted in a positive and significant influence of the three independent variables on user satisfaction, either partially or simultaneously.Penelitian ini bertujuan untuk mengetahui pengaruh kualitas website BPS Kab. Siak terhadap kepuasan pengguna website. Pada penelitian ini kualitas website diukur dengan menggunakan metode webqual. Variabel webqual merupakan variabel bebas yang terdiri dari kemudahan penggunaan, kualitas informasi dan kualitas interaksi layanan. Sedangkan variabel terikatnya adalah kepuasan pengguna. Metode penelitian yang digunakan dalam penelitian ini adalah metode kuantitatif korelasional. Sampel dipilih dari populasi pengguna website BPS Kab. Siak, yang dihitung dengan menggunakan rumus Slovin dengan signifikansi 10%. Untuk menguji pengaruh variabel bebas terhadap variabel terikat menggunakan analisis regresi linier berganda. Penelitian ini menghasilkan pengaruh yang positif dan signifikan dari ketiga variabel bebas terhadap kepuasan pengguna, baik secara parsial maupun secara simultan
KOMPARASI METODE ESTIMAS DEBIT AIR CHILLER
No full textPada umumnya tidak semua chiller dilengkapi oleh alat ukur debit air (Flow meter) yang permanen untuk mengukur debit air kondensor dan evaporator. Hal ini dikarenakan mahalnya biaya investasi untuk pengadaan alat tersebut. Dikarenakan hal ini, dalam beberapa tahun terakhir dikembangan alat ukur virtual untuk “mengukur” debit air pada kondensor dan evaporator. Alat ukur virtual ini dikenal dengan sebutan virtual flow meter (VFM). Untuk itu penelitian ini akan melakukan studi komparasi metode VFM yang menggunakan model kesetimbangan energi. Studi komparasi bertujuan untuk mengetahui keakuratan masing-masing metode VFM yang ada
Pembelajaran ekosistem melalui model kooperatif tipe Think Pair Share (TPS) berbantu Wordwall terhadap Keterampilan Berpikir Kritis (KBKr) siswa
No full textENGLISH :
Critical thinking is one of the skills that students need in the 21st century. This research aims to describe the influence of ecosystem learning through a cooperative learning type Think Pair Share (TPS) by using Wordwall over students critical thinking skills. The research method using mixed methods with a embedded design. The research sample selected by simple random sampling technique. The data from study results in the form of the average score of students critical thinking skills in classes using cooperative learning type TPS is 78.23. The score is greater than the average score of students in the class who do not use cooperative learning type TPS (51.48). Critical thinking skills N-Gain score in the experimental class reached (0.58) indicating the success of the learning process through cooperative learning type TPS by using Wordwall. The best score is on strategy and tactic indicators with an average of 3,871. The results of the t-test show the value of Sig.2-tailed by 0.000 < 0.05 (Ho accepted), treatment in experimental classes, namely independent thinking processes (think), group collaboration (Pair) and discussion (Share) make students active and trained to think critically. Ecosystem learning through a cooperative learning type TPS by using Wordwall has a significant effect on students critical thinking skills.
INDONESIA :
Berpikir kritis merupakan salah satu keterampilan yang dibutuhkan siswa di abad 21. Penelitian ini bertujuan untuk mendeskripsikan pengaruh pembelajaran ekosistem melalui model kooperatif tipe think pair share (TPS) berbantu Wordwall terhadap keterampilan berpikir kritis (KBKr) siswa. Metode penelitian yang digunakan adalah mixed methods dengan desain embedded. Sampel penelitian dipilih melalui teknik simple random sampling. Data hasil penelitian berupa nilai rata-rata keterampilan berpikir kritis siswa pada eksperimen yaitu 78,23. Nilai tersebut lebih besar daripada nilai rata-rata siswa pada kelas kontrol yaitu 51,48. Nilai N-Gain keterampilan berpikir kritis pada kelas eksperimen mencapai 0,58 menunjukan keberhasilan proses pembelajaran melalui model kooperatif tipe TPS berbantu Wordwall. Perolehan skor terbaik yaitu pada indikator strategi dan taktik dengan rata-rata sebesar 3,871. Hasil uji-t diperoleh nilai Sig. 2-tailed sebesar 0,000 < 0,05 (Ho diterima), artinya perlakuan pada kelas eksperimen yaitu proses berpikir mandiri, kolaborasi kelompok dan diskusi menjadikan siswa aktif dan terlatih untuk berpikir kritis. Pembelajaran ekosistem melalui model kooperatif tipe TPS berbantu Wordwall berpengaruh signifikan terhadap keterampilan berpikir kritis siswa
Efektivitas Community-Based Correction dalam Mengurangi Tingkat Residivisme
No full textPenelitian ini bertujuan untuk menganalisis efektivitas Community-Based Correction (CBC) dalam mengurangi tingkat residivisme di Indonesia. CBC merupakan pendekatan pemasyarakatan berbasis non-pemenjaraan yang menekankan pembinaan dan reintegrasi sosial mantan narapidana melalui keterlibatan masyarakat. Dengan menggunakan metode kualitatif studi kasus di salah satu Balai Pemasyarakatan, penelitian ini mengungkap bahwa CBC berperan signifikan dalam menurunkan pengulangan tindak pidana. Hasil penelitian menunjukkan adanya penurunan angka residivisme sebesar 30% setelah implementasi CBC secara aktif. Program pembinaan yang melibatkan kerja sosial, pelatihan keterampilan, serta pendampingan oleh Pembimbing Kemasyarakatan terbukti meningkatkan kesiapan sosial-ekonomi mantan narapidana. Meskipun demikian, pelaksanaan CBC masih menghadapi hambatan seperti keterbatasan sumber daya manusia, kurangnya pemahaman masyarakat, dan minimnya dukungan regulasi. Oleh karena itu, dibutuhkan penguatan kapasitas kelembagaan, peningkatan peran masyarakat, serta dukungan kebijakan nasional agar CBC dapat diimplementasikan secara optimal dan berkelanjutan. Dengan pendekatan yang kolaboratif, CBC berpotensi menjadi solusi strategis dalam menekan residivisme dan membangun sistem pemasyarakatan yang lebih adil dan manusiawi
