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Marine Science and Technology Journal
Published by Universitas IVET
ISSN : 27150305     EISSN : 27461580     DOI : https://doi.org/10.31331/maristec
Core Subject : Engineering,
Engineering
The range of topics extends from research in naval architecture, marine engineering, and ocean engineering to marine-related research in the fields of environmental science and technology, oceanography, computational mechanics, and information technology. In addition to original, full-length refereed contributions presenting new research and developments in the field, the journal also publishes review papers authored by leading authorities. Presents new research in naval architecture, marine engineering, and ocean engineering Covers marine-related research in environmental science and technology, oceanography, computational mechanics, and information technology Publishes original research contributions and reviews authored by leading authorities
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 42 Documents
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Perencanaan Kebutuhan Pendinginan Udara Auditorium Universitas Ivet Suyanto Suyanto; Riyanto Wibowo
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

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Abstract

The need for air cooling is currently considered important, especially for cooling meeting rooms and auditoriums. Thus the cool and comfortable air conditions can be presented. This research was conducted to determine the air cooling load in the Ivet University Auditorium. The method used is to calculate the amount of heat that comes from outdoors and indoors. The amount of heat from the room is the heat from the sun's heat that propagates through walls, roofs, glass windows and doors. The heat that comes from inside the room is sourced from humans as occupants, lights, and other electronic equipment. From the results of data analysis it can be determined that the cooling load of Ivet University Auditorium is 11,1100 Watts or equivalent to 379073 Btu / hr. The total AC power needed to cool the room is 42 PK.
An Analysis Of Students Perception And Production Problems Of Pronouncing English Palato Alveolar Sounds Dwi Sulistyorini; Rachmat Ari Wibowo
Marine Science and Technology Journal Vol 1 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1590

Abstract

This study is about students’ error in perceiving and producing English palato alveolar sounds. The aims of this study are to describe how well the students perceive and produce English palato alveolar sounds and to find out the most common problems/errors encountered by the students whether in the level perception or production. This study used mix-method design. There were thirty eighth grade students as the sample of this study taken by convenience sampling technique. The data of this study were gained from two kinds of test, namely perception test in the form of listening test and production test in the form of speaking test. The results of both listening and speaking test were the source of data for this study. This study revealed that the eighth grade students were good in perceiving English palato alveolar sounds with errors 36% and were fair in producing English palato alveolar sounds with errors 53%. Therefore, it can be concluded that the most common problems faced by the students were at the production level and there were also some factors influenced them in producing English palato alveolar sounds, namely the non-existence of English palato alveolar sounds, the influence of orthographic writing, the influence of distractor sounds and the interference of mother tongue. It is suggested that the students practice a lot in pronouncing English palato alveolar sounds and the teachers provide many learning strategies and improve their teaching quality.
Analisa Perhitungan Penambahan Konstruksi Sekat Dan Dasar Ganda SPOB 3500 DWT Berdasarkan Aturan BKI 2019 Panut Widodo
Marine Science and Technology Journal Vol 1 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1584

Abstract

Self propelled barge SPOB 3500 DWT carrying Crude Product Oil (CPO) in this study, was built in Singapore in 1984. After operating for a long time, this ship was then included in the Indonesian Classification (BKI), so that in terms of construction it must also follow the requirements of BKI 2019 regulations,. In order to find out the construction adjustments needed to be accepted by the class and also to prevent over-construction, it is necessary to calculate the additional construction based on the latest BKI rules. In this study, an analysis of the old construction drawing data was carried out and mathematical calculation of size of additional transverse bulkhead construction and pelate of double bottom based on rules BKI 2019 Volume. Based on data and regulations of BKI 2019, this ship must add 2 units of transverse bulkhead at cargo tank and change the bottom construction from a single bottom to a double bottom installed along the cargo tank. From the calculation results, it knew that the old bulkhead pelate thickness still meets BKI requirements, the additional transverse bulkhead pelate thickness is 8.0 mm, the double bottom height is 1010 mm and the inner bottom pelate thickness is 8.0 mm.
Identifikasi Turunnya Kinerja Cargo Handling pada Proses Reliquefaction Gas di Kapal LPG/C Gas Eka Darmana; Wendy WK
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

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Abstract

Reliquefaction plant is a machine system that have function to maintain pressure in the cargo tank. And has an important role in the process of cargo handling to keep cargo in a liquid state. The problems that occur in the reliquefaction plant will result in a decline in the performance of the cargo handling process which will result in hampered vessel operational activities. The observation was carried out at LPG / C GAS WALIO which is a ship owned by PT. PERTAMINA. The source of the data obtained by the author is obtained by direct observation at the research site and direct interviews with gas engineers and engineers at the research site. In addition, data sources are also obtained from manual books on the ship. The results of the study stated that the decline in cargo handling performance in the gas reactivity process was caused by several factors including: less than the maximum compression of the cargo compressor, lack of the amount of sea water circulated into the system and the lack of vacuum in the cargo condensor. These things result in not achieving the ideal temperature on the chargo and the process of reliquefaction takes a long time.
Perbandingan Radiasi Sinar UV Pada Pelaksanaan Praktik Pengelasan (SMAW) Di Fakultas Kemaritiman UNISVET Dengan Peralatan Sterilisasi Corona Virus 19 Ratna Dwi Kurniawan; Rudy S
Marine Science and Technology Journal Vol 1 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1591

Abstract

Covid19 has changed the behavior of the world's people, until the whole world is affected, schools, offices, public places are closed, restrictions on activities, this condition forces scientists to be extra hard to create inventions to overcome these problems. Medicines to treat it have not yet been found, but several vaccines have been found, but whether the effectiveness of the vaccines can really overcome the pandemic, then efforts that can be done are to minimize the spread of the corona virus. Apart from medicine and vaccines, research is also being conducted on the equipment that can be used to kill viruses. Equipment with UV light has been widely offered and even sold freely, even though the use of UV can not be arbitrary because it can cause irritation. In welding that also emits harmful UV radiation, with a current of 150 -200A, Radiation ranges from 0.87-3.2 W / m2 far beyond the allowable limit of 0.001W / m2, while that of the steilization equipment ranges from 2.8 W / m2 By looking at this comparison, can the implementation of welding practices on campus be said to be safe? Because the UV emission from welding the value is like that used in sterilization equipment.
Analisa Pengaruh Sudut Kemiringan Panel Surya100 WP Terhadap Daya Listrik Rita Hariningrum
Marine Science and Technology Journal Vol 1 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1585

Abstract

Pemanfaatan Limbah Sampah Sebagai Energi Alternatif Pembangkit Tenaga Listrik di Semarang Sukarno Budi Utomo; Rita Hariningrum
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

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Abstract

The need for electrical energy in Indonesia is increasing every year so other alternative energy sources need to be found. Waste is a major problem for residents of many cities, along with the rate of population growth which has an impact on the increasing amount of waste generated. To explore the potential of new renewable energy, namely the construction of a Waste Power Plant (PLTSa). Potential of waste energy in Jatibarang Landfill sourced from 16 sub-districts of Semarang City Region has a large amount of waste production, so that in this study research needs to be done on the use of waste as an alternative energy source to be utilized as Renewable Energy (EBT) to be managed into electrical energy that is useful for the community. From this study the electrical energy that can be utilized for PLTSa in 1 year for the next 5 years (2017 - 2021) is 84,627.02 Mwh / year in 2017, then 82,308.43 Mwh / year in 2018, after that 83,627.97 Mwh / year in 2019, then 83,179.35 Mwh / year in 2020, and finally 83,434.88 in 2021. The average output power of generators is 9,525.63 kW as potential electrical energy from waste waste.
Upaya Optimalisasi Kesiapan Alat – Alat Pemadam Kebakaran Dalam Menjaga Keselamatan di Atas Kapal Santhi Wilastari; Syailendra Wibowo
Marine Science and Technology Journal Vol 1 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1586

Abstract

The objectives discussed in this paper are to answer the questions in the subject matter, namely to increase understanding of safety equipment, especially fire fighting equipment. So that it can optimize its performance. Increase the level of readiness of fire extinguishers so that whenever and whenever fire extinguishers have to be used they will be maximally used. OHS officers are people who work with the task of occupational health and safety as well as operating and maintaining fire extinguishers so that fires can be prevented. Where the duties and responsibilities must be carried out and accounted for properly according to orders from the leadership of the company. Fire extinguishers are one of the countermeasures and minimize the occurrence of fire hazards. So the role of fire extinguishers is very important, fire fighting is an action that must be taken to create a safe and efficient work environment. Skills include knowledge of fire extinguishers and the responsibilities that must be carried out. Therefore, it is very necessary to improve the skills of OHS officers, namely by increasing the material for the discussion of fire extinguishers, carrying out fire extinguishing exercises and maintaining and checking fire extinguishers.
Pronounciation Error in Speaking Performance of Seafarer Students Haryani Haryani; Rachmat AW; Ali Rafsanjani
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

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Abstract

Pronunciation can be an important aspect of learning to speak. When the pronunciation is wrong, it may interfere with the listener's understanding of the message. The students also experienced some difficulties in pronouncing some words, especially in vowels and consonants. The purpose of this study was to determine the pronunciation errors of seafaring students of Polytechnic Bumi Akpelni Semarang, and to find out the most dominant error. The author classifies pronunciation errors into four categories based on Dulay, Burt & Karshen's theory. This study uses qualitative research, and content analysis as a method of analyzing and interpreting data from speaking transcripts of KPN Polytechnic Bumi Akpelni Semarang students. There were 16 students who were the research subjects. The author analyzes the pronunciation of students' mistakes from their transcript of their speech. The results of this study are, there are 46 data consisting of 28 (60%) misformation, 12 (26.1%) additional, 6 (13%) negligence and 0 (0%) misordering. The most dominant error is misformation error and there is no misordering error in this study. In fact, students sometimes pronounce English words correctly spontaneously, even though they don't know how to pronounce correctly and only use their feelings.
Pengkondisian Udara Rumah Tinggal di Semarang Suyanto Suyanto; Sri Pramono
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i1.1282

Abstract

The air condition in residential or office buildings needs to be sought so that the conditions are fresh and comfortable for the residents. Indonesia with a tropical climate has hot temperatures and high humidity levels. For this reason, the application of air conditioning systems is needed. The study was conducted by survey to record the size of the house, the area of ventilation, the number and size of air conditioners used, the temperature of the use of air conditioners, and the monthly electricity bill. Data is processed to obtain specific data on the adequacy of ventilation, the level of ACusage, the temperature of AC usage, and the level of AC electricity usage. The results of this study are that 77% of residential houses have ventilation areas that meet minimum requirements. Houses that use AC as much as 60%. Almost all air conditioners are used in sleeping rooms. AC users mostly choose cool comfortable temperatures, which is 55%. As for whochose the temperature of the use of air conditioners in optimal comfortable conditions by 35%. While those who choose warm temperatures to comfort in the use of AC as much as 10%. The average electricity bill due to the use of AC is 34% of the total residential electricity bill.

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