scholarly journals Simulasi Pendistribusian Spare Part Oxygen Crew Pesawat Airbus Milik Maskapai X Di Bandara Pattimura Ambon

2021 ◽  
Vol 6 (2) ◽  
pp. 56-67
Author(s):  
Israq Mifan Junaidi ◽  
Mufti Arifin ◽  
Endah Yuniarti
Keyword(s):  
Spare Part ◽  
Flight Crew ◽  
North West

Berdasarkan observasi lapangan, ditemukan adanya indikasi kebocoran oxygen crew pada saat pesawat terbang dari Bandara Soekarno Hatta menuju Bandara Pattimura Ambon. Sesuai dengan FCOM (Flight Crew Operating Manual) untuk pesawat airbus jika ada 2 crew dalam cockpit maka minimum tekanan oksigen darurat untuk flight crew adalah 540 PSI. Sehubungan dengan itu, maka diperlukan analisis pengaruh distribusi spare part oxygen crew pesawat airbus milik maskapai X di Bandara Patimura, dengan tujuan untuk mengetahui pendistribusian komponen pada setiap station yang saling berhubungan, mengetahui pengaruh ketersediaan spare part oxygen crew bagi pesawat yang akan beroperasi, dan mengetahui lokasi penyimpanan dan kebutuhan spare part. Penelitian ini menggunakan metode riset operasi yang terdiri dari metode VAM (Vogel Approximation Methode), metode inspeksi (Least Cost) dan metode NWC (North West Corner). Setelah dilakukan perhitungan menggunakan 3 metode tersebut, diperoleh metode yang tepat untuk proses pendistribusian spare part oxygen crew adalah metode VAM (Vogel Approximation Methode) dengan biaya US$ 141 untuk memenuhi seluruh kebutuhan station.

scholarly journals The North-West University’s High Altitude Radiation Monitor programme

2021 ◽  
Vol 117 (1/2) ◽  
Author(s):  
Moshe G. Mosotho ◽  
Roelf D. Strauss ◽  
Rendani R. Nndanganeni ◽  
Jacobus P. van den Berg
Keyword(s):  
High Altitude ◽  
Radiation Effects ◽  
Public Awareness ◽  
Flight Crew ◽  
Commercial Aircraft ◽  
Model Calculations ◽  
North West ◽  
Radiation Monitor ◽  
International Airport ◽  
The North

Since the discovery of cosmic radiation by Victor Hess in 1912, when he reported a significant increase in radiation as altitude increases, concerns about radiation effects on human bodies and equipment have grown over the years. The secondary and tertiary particles which result from the interaction of primary cosmic rays with atmospheric particles and commercial aircraft components, are the primary cause of the radiation dose deposited in human bodies and in electronic equipment (avionics) during aircraft flights. At an altitude of about 10 km (or higher) above sea level, the dose received by frequent flyers, and especially flight crew, is a serious concern. Also of concern is the possible failure of sensitive equipment on board commercial aircrafts as a result of flying through this mixed radiation field. Monitoring radiation in the atmosphere is therefore very important. Here we report on the first measurements by the High Altitude Radiation Monitor (HARM) detector during a commercial flight from Johannesburg (O.R. Tambo International Airport) to Windhoek (Hosea Kutako International Airport). As part of a public awareness activity, the HARM detector was placed on a high-altitude balloon, and these measurements are also shown here. Model calculations (estimations) of radiation levels for the commercial aircraft flight are shown and the results are used to interpret our measurements.

Electron Microscopic Examination of a Transplantable Rat Mammary Carcinoma

1968 ◽  
Vol 26 ◽  
pp. 20-21
Author(s):  
S. Shirahama ◽  
G. C. Engle ◽  
R. M. Dutcher
Keyword(s):  
Electron Microscope ◽  
Osmium Tetroxide ◽  
Electron Microscopic Examination ◽  
Undifferentiated Carcinoma ◽  
Uranyl Acetate ◽  
Sprague Dawley ◽  
Electron Microscopic ◽  
North West ◽  
X Irradiation ◽  
Tissue Specimens

A transplantable carcinoma was established in North West Sprague Dawley (NWSD) rats by use of X-irradiation by Engle and Spencer. The tumor was passaged through 63 generations over a period of 32 months. The original tumor, an adenocarcinoma, changed into an undifferentiated carcinoma following the 19th transplant. The tumor grew well in NWSD rats of either sex at various ages. It was invariably fatal, causing death of the host within 15 to 35 days following transplantation.Tumor, thymus, spleen, and plasma from 7 rats receiving transplants of tumor at 3 to 9 weeks of age were examined with an electron microscope at intervals of 8, 15, 22 and 30 days after transplantation. Four normal control rats of the same age were also examined. The tissues were fixed in glutaraldehyde, postfixed in osmium tetroxide and embedded in Epon. The plasma was separated from heparanized blood and processed as previously described for the tissue specimens. Sections were stained with uranyl acetate followed by lead citrate and examined with an RCA EMU-3G electron microscope.

SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

1990 ◽  
Vol 48 (3) ◽  
pp. 58-59
Author(s):  
Daryl A. Cornish ◽  
George L. Smit
Keyword(s):  
Morphological Characteristics ◽  
Oreochromis Mossambicus ◽  
Breeding Cycle ◽  
Limited Information ◽  
North West ◽  
The North ◽  
Sem And Tem ◽  
Sperm Development ◽  
Ultrastructural Characteristics ◽  
The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

The Clinical Spectrum of Anaphylaxis in North-West England

1996 ◽  
Vol 26 (12) ◽  
pp. 1364-1370 ◽  
Author(s):  
R. S. H. Pumphrey ◽  
S. J. Stanworth
Keyword(s):  
Clinical Spectrum ◽  
North West

The North West Passage

2014 ◽  
Author(s):  
Roald Amundsen ◽  
Godfred Hansen
Keyword(s):  
North West ◽  
The North

Asiana Airlines Flight 214

2014 ◽  
Vol 4 (2) ◽  
pp. 113-121 ◽  
Author(s):  
Stephanie Chow ◽  
Stephen Yortsos ◽  
Najmedin Meshkati
Keyword(s):  
Human Factors ◽  
Aviation Safety ◽  
Cultural Factors ◽  
Vital Role ◽  
Cultural Issues ◽  
Flight Crew ◽  
Pilot Performance ◽  
Engineering Designs ◽  
Flight Deck

This article focuses on a major human factors–related issue that includes the undeniable role of cultural factors and cockpit automation and their serious impact on flight crew performance, communication, and aviation safety. The report concentrates on the flight crew performance of the Boeing 777–Asiana Airlines Flight 214 accident, by exploring issues concerning mode confusion and autothrottle systems. It also further reviews the vital role of cultural factors in aviation safety and provides a brief overview of past, related accidents. Automation progressions have been created in an attempt to design an error-free flight deck. However, to do that, the pilot must still thoroughly understand every component of the flight deck – most importantly, the automation. Otherwise, if pilots are not completely competent in terms of their automation, the slightest errors can lead to fatal accidents. As seen in the case of Asiana Flight 214, even though engineering designs and pilot training have greatly evolved over the years, there are many cultural, design, and communication factors that affect pilot performance. It is concluded that aviation systems designers, in cooperation with pilots and regulatory bodies, should lead the strategic effort of systematically addressing the serious issues of cockpit automation, human factors, and cultural issues, including their interactions, which will certainly lead to better solutions for safer flights.

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