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All Journal Jurnal Pendidikan Matematika Universitas Lampung Jurnal Pendidikan Matematika Universitas Lampung Impression : Jurnal Teknologi dan Informasi
Sandi, Wulan Marlia
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Mathematics

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Cadet Worksheet (CW) Design to understand how to determine the area of ​​the water plane (WP) and tons per centimeter of immersion (TPC) using the Simpson 1/3 formula Kristanto, Vigih Hery; Agustina, Eka Nurmala Sari; Rahmawati, Tanti Diyah; Sandi, Wulan Marlia
JURNAL PENDIDIKAN MATEMATIKA UNIVERSITAS LAMPUNG Vol 12, No 3 (2024): SEPTEMBER-OKTOBER 2024
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aim of this research is to determine the quality of the Cadet Worksheet (LKT) design and to find out how the LKT design is suitable for use to understand how to determine the area of the Water Plane (WP) and Tons per Centimeter Immersion (TPC) using the Simpson 1/3 formula. This research is a qualitative research type of intrinsic case study. Researchers develop the LKT design, then determine the quality of the LKT design based on the validator's opinion. The quality of the LKT design is in the very suitable category with a KyDr gain of 92%. In addition, an LKT design that is suitable for use to understand how to determine the area of the water plane (WP) and tons per centimeter of immersion (TPC) using the Simpson 1/3 formula must contain a course identity that contains learning objectives, an introduction, namely contextual problem orientation, activities that aims to understand prerequisite material, concept discovery activities, activities to apply concepts, practice questions to deepen concepts.Keywords: cadets worksheet (CW); design; simpson formula 1/3AbstrakTujuan dari penelitian ini adalah untuk mengetahui kualitas desain Lembar Kerja Taruna (LKT) dan untuk mengetahui bagaimana desain LKT yang layak digunakan untuk memahami cara penentuan luas Water Plane (WP) dan Ton per Centimeter Immersion (TPC) menggunakan formula Simpson 1/3. Penelitian ini adalah penelitian kualitatif jenis intrinsic case study. Peneliti mengembangkan desain LKT, kemudian menentukan kualitas desain LKT berdasarkan pendapat validator. Kualitas desain LKT berada pada kategori sangat layak digunakan dengan perolehan KyDr sebesar 92%. Selain itu, desain LKT yang layak digunakan untuk memahami cara Penentuan Luas Water Plane (WP) dan Ton per Centimeter Immersion (TPC) Menggunakan Formula Simpson 1/3 harus memuat identitas mata kuliah yang berisi tujuan pembelajaran, pendahuluan yaitu orientasi masalah kontekstual, aktivitas yang bertujuan untuk memahami materi prasayarat, aktivitas penemuan konsep, aktivitas untuk menerapkan konsep, soal latihan untuk memperdalam konsep.Kata Kunci: desain; formula simpson 1/3; lembar kerja taruna (LKT)DOI: http://dx.doi.org/10.23960/mtk/v12i3.pp165-177
Cadet Worksheet (CW) Design to understand how to determine the area of ​​the water plane (WP) and tons per centimeter of immersion (TPC) using the Simpson 1/3 formula Kristanto, Vigih Hery; Agustina, Eka Nurmala Sari; Rahmawati, Tanti Diyah; Sandi, Wulan Marlia
JURNAL PENDIDIKAN MATEMATIKA UNIVERSITAS LAMPUNG Vol 12, No 3 (2024): SEPTEMBER-OKTOBER 2024
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aim of this research is to determine the quality of the Cadet Worksheet (LKT) design and to find out how the LKT design is suitable for use to understand how to determine the area of the Water Plane (WP) and Tons per Centimeter Immersion (TPC) using the Simpson 1/3 formula. This research is a qualitative research type of intrinsic case study. Researchers develop the LKT design, then determine the quality of the LKT design based on the validator's opinion. The quality of the LKT design is in the very suitable category with a KyDr gain of 92%. In addition, an LKT design that is suitable for use to understand how to determine the area of the water plane (WP) and tons per centimeter of immersion (TPC) using the Simpson 1/3 formula must contain a course identity that contains learning objectives, an introduction, namely contextual problem orientation, activities that aims to understand prerequisite material, concept discovery activities, activities to apply concepts, practice questions to deepen concepts.Keywords: cadets worksheet (CW); design; simpson formula 1/3AbstrakTujuan dari penelitian ini adalah untuk mengetahui kualitas desain Lembar Kerja Taruna (LKT) dan untuk mengetahui bagaimana desain LKT yang layak digunakan untuk memahami cara penentuan luas Water Plane (WP) dan Ton per Centimeter Immersion (TPC) menggunakan formula Simpson 1/3. Penelitian ini adalah penelitian kualitatif jenis intrinsic case study. Peneliti mengembangkan desain LKT, kemudian menentukan kualitas desain LKT berdasarkan pendapat validator. Kualitas desain LKT berada pada kategori sangat layak digunakan dengan perolehan KyDr sebesar 92%. Selain itu, desain LKT yang layak digunakan untuk memahami cara Penentuan Luas Water Plane (WP) dan Ton per Centimeter Immersion (TPC) Menggunakan Formula Simpson 1/3 harus memuat identitas mata kuliah yang berisi tujuan pembelajaran, pendahuluan yaitu orientasi masalah kontekstual, aktivitas yang bertujuan untuk memahami materi prasayarat, aktivitas penemuan konsep, aktivitas untuk menerapkan konsep, soal latihan untuk memperdalam konsep.Kata Kunci: desain; formula simpson 1/3; lembar kerja taruna (LKT)DOI: http://dx.doi.org/10.23960/mtk/v12i3.pp165-177
Analisis Kerusakan Bearing Turbine Side di Turbocharger Type VTR-160 pada Auxiliary Engine Ashari, Muhammad Sadeli; Robbi, Shofa Dai; Sandi, Wulan Marlia; Kristiyono, Antonius Edy; Prawoto, Agus
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 1 (2025): Maret 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i1.787

Abstract

Turbocharger adalah alat bantu yang digerakkan oleh gas buang auxiliary diesel engine dan berfungsi memompa udara untuk proses pembilasan dan pembakaran di dalam silinder. Kinerja mesin ini sangat bergantung pada turbocharger. Kerusakan pada turbocharger, khususnya pada bearing, dapat menurunkan performa mesin secara signifikan. Penelitian ini bertujuan untuk mengidentifikasi penyebab kerusakan bearing turbocharger, dampaknya terhadap auxiliary engine, serta upaya perbaikannya di MV Armada Sejati. Metode yang digunakan adalah deskriptif kualitatif dengan pendekatan fishbone. Data dikumpulkan melalui observasi, wawancara, dan dokumentasi. Hasil penelitian menunjukkan bahwa kerusakan disebabkan oleh tercampurnya oli pelumas dengan gas buang, keausan sealing bush, dan tersumbatnya lubang oil pump. Dampaknya antara lain berkurangnya suplai udara, kerusakan ring piston, dan pembakaran yang tidak sempurna sehingga daya mesin menurun. Upaya pencegahan dilakukan dengan perawatan rutin turbocharger, penggantian komponen lama, serta pergantian oli pelumas secara berkala. A turbocharger is an auxiliary exhaust device that is driven by the auxiliary exhaust of a diesel engine and functions to pump air for the rinsing and combustion process inside the cylinder. The performance of this engine is highly dependent on the turbocharger. Damage to the turbocharger, especially to the bearings, can significantly degrade engine performance. This study aims to identify the cause of damage to the turbocharger bearing, its impact on the auxiliary engine, and its repair efforts in MV Armada Sejati. The method used is qualitative descriptive with a fishbone approach. Data was collected through observation, interviews, and documentation. The results of the study showed that the damage was caused by the mixing of lubricating oil with exhaust gases, the wear of the sealing bush, and the clogging of the oil pump holes. The impact includes reduced air supply, damage to the piston rings, and imperfect combustion so that engine power decreases. Prevention efforts are carried out with regular maintenance of turbochargers, replacement of old components, and periodic changes of lubricating oil  
Analisis Kinerja Pembakaran Nozzle Burner Pada Auxiliary Boiler Di Mv. Pan Kristine Dwisaputra, Muhammad Akmal; Simatupang, Rama Syahputra; Sandi, Wulan Marlia; Nugroho, Azis; Robbi, Shofa Dai
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 2 (2025): July 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i2.970

Abstract

Penelitian ini bertujuan untuk menganalisis faktor penyebab dan dampak dari tersumbatnya nozzle burner pada auxiliary steam boiler di kapal MV. Pan Kristine. Permasalahan yang muncul berupa penurunan tekanan uap dan flame failure saat kapal berlabuh, yang diduga disebabkan oleh gangguan pada sistem pembakaran. Data dikumpulkan melalui observasi langsung, wawancara dengan kru mesin, dokumentasi, serta studi pustaka. Hasil penelitian menunjukkan bahwa penyumbatan nozzle burner disebabkan oleh kurangnya perawatan rutin sesuai Planned Maintenance System (PMS), sistem filtrasi bahan bakar yang tidak efisien, nozzle yang aus atau rusak, serta jarak elektroda yang tidak sesuai dengan manual book. Dampak dari kondisi ini meliputi penurunan efisiensi pembakaran, peningkatan akumulasi jelaga dan kerak di ruang bakar, serta gangguan operasi boiler secara keseluruhan. Penelitian ini merekomendasikan penerapan PMS yang ketat, pemeriksaan berkala pada filter dan nozzle, serta pelatihan kru untuk meningkatkan pemahaman terhadap sistem pembakaran guna menjamin keandalan dan efisiensi kerja auxiliary boiler.   This study aims to analyze the causes and impacts of nozzle burner clogging in the auxiliary steam boiler aboard the MV. Pan Kristine. The issue arose from steam pressure drops and repeated flame failures while the ship was anchored, suspected to result from malfunction in the combustion system. Data were collected through direct observation, interviews with engine crew, documentation, and literature study. The findings reveal that the clogging of the nozzle burner is caused by insufficient routine maintenance according to the Planned Maintenance System (PMS), inefficient fuel filtration, worn or damaged nozzles, and electrode spacing that does not comply with the instruction manual. These issues lead to reduced combustion efficiency, increased soot and scale accumulation in the combustion chamber, and overall operational disruption of the boiler. The study recommends implementing a strict PMS, regular inspection of fuel filters and nozzles, and improved crew training to ensure the reliability and efficiency of the auxiliary boiler system.  
Co-Authors Ashari, Muhammad Sadeli Dwisaputra, Muhammad Akmal Eka Nurmala Sari Agustina, Eka Nurmala Sari Kristiyono, Antonius Edy Nugroho, Azis Prawoto, Agus Robbi, Shofa Dai Simatupang, Rama Syahputra Tanti Diyah Rahmawati, Tanti Diyah Vigih Hery Kristanto