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Marine Propulsion System Reliability Assesment by Fault Tree Analysis
Tran Van Ta,
Doan Minh Thien,
Vo Trong Cang
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
1-7
Received:
17 August 2016
Accepted:
18 August 2016
Published:
8 December 2016
DOI:
10.11648/j.ijmea.s.2017050401.11
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Abstract: Research on reliability to ensure that the operation of transport facilities is safe. This issue is always concerned by transportation operators. This article presents a number of research using Fault Tree Analysis method (FTA) to model the analysis, reliability assessment of marine propulsion system.
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Impact of Working Capital Management to Business Efficiency of Association of Asia Pacific Airlines
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
8-13
Received:
30 November 2016
Accepted:
4 December 2016
Published:
6 January 2017
DOI:
10.11648/j.ijmea.s.2017050401.12
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Abstract: The management of working capital plays an important role for the success of the business operations of the airline. The study is based on data from the financial statements of the airlines in the Association of Asia Pacific Airlines (AAPA) for the period of 2010-2015. The study results showed an opposite impact of day inventory outstanding and days of sales outstanding to profit before tax on assets; positive of current ratio to the profit before tax on assets and positive of financial leverage to profit before tax on equity. These results suggest that airlines need to rationalize supplies of aircraft spare parts inventory, increased the ability to recover cash from selling air transport products and strengthen collaborative relationships with suppliers in order to improve efficiency of working capital management, contribute to improve business efficiency.
Abstract: The management of working capital plays an important role for the success of the business operations of the airline. The study is based on data from the financial statements of the airlines in the Association of Asia Pacific Airlines (AAPA) for the period of 2010-2015. The study results showed an opposite impact of day inventory outstanding and day...
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Operating Rooms Planning and Scheduling with Mix Integer Programming and Meta-Heuristic Method
Mehdi Askarizadeh,
Faieza Abdul Aziz,
Mohd Khairol Anuar,
Siti Azfanizam Binti Ahmad
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
14-19
Received:
27 December 2016
Accepted:
5 January 2017
Published:
17 January 2017
DOI:
10.11648/j.ijmea.s.2017050401.13
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Abstract: The surgery department is required to improve its performance by efficient usage of its available resources. Surgery department interdependencies with other hospital functions and departments are numerous and complex, which causes some restrictions on surgery ward performance and consequently hospital performance. Operating room (OR) schedule determines day to day operations that take a place at the surgery department. Creating such a schedule is a complex task, due to a multitude of constraints, preferences and objectives that planners need to take into account. Meanwhile, the schedule has major effects on the performance of surgery department and the hospital. This paper provides a review of recent operational research on operating room planning and scheduling with focus on multi-objective simulation optimization with use meta-heuristic method: in operating room, as a practical suggestion for hospitals. Recent researches were collected based on some keywords including simulation optimization, and operating room by google scholar, Scopus, and Pubmed. The findings showed that, there are not much practical suggestion in this case and still there is a gap and needs to be discovered.
Abstract: The surgery department is required to improve its performance by efficient usage of its available resources. Surgery department interdependencies with other hospital functions and departments are numerous and complex, which causes some restrictions on surgery ward performance and consequently hospital performance. Operating room (OR) schedule deter...
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The Contribution of Total Factor Productivity in the Air Transport of Vietnam: The Case of Vietnam Airlines
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
20-25
Received:
28 December 2016
Accepted:
5 January 2017
Published:
20 January 2017
DOI:
10.11648/j.ijmea.s.2017050401.14
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Abstract: The aim of this study is to determine the contribution of Total Factor Productivity (TFP) in the air transport of Vietnam over the case of Vietnam Airlines. Based on analyzing data of Vietnam Airlines from 2005 to 2015, this study showed that fixed assets, labor and TFP are factors that affecting the output elements of Vietnam Airlines as Available of Ton- Kilometers Conversion (ATKC), Performance of Ton-Kilometers Conversion (PTKC), revenue and value added. Among these factors, the contribution of fixed assets is higher than labor, especially in generating revenue and value added. In the period from 2006 to 2010, the growth of Vietnam Airlines was due to the increase in fixed assets, labor and TFP, but in the period from 2011 to 2015, this growth was mainly due to the increase of fixed assets. The results of this study suggest Vietnam Airlines and others airline in Vietnam can increase efficiency growth by investing capital in order to increase fixed assets, increase labor, innovate technology, improve management and improve labor skills.
Abstract: The aim of this study is to determine the contribution of Total Factor Productivity (TFP) in the air transport of Vietnam over the case of Vietnam Airlines. Based on analyzing data of Vietnam Airlines from 2005 to 2015, this study showed that fixed assets, labor and TFP are factors that affecting the output elements of Vietnam Airlines as Available...
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Integration of a Multi-scale Homogenization Model into Finite Element Software for Predicting Mechanical Properties of Bulk Moulding Compound (BMC) Composite
Le Thi Tuyet Nhung,
Vu Dinh Quy,
Vu Quoc Huy,
Phan Truc Dien
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
26-32
Received:
26 May 2017
Accepted:
1 June 2017
Published:
17 July 2017
DOI:
10.11648/j.ijmea.s.2017050401.15
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Abstract: Bulk Moulding Compound (BMC) is a short fiber composite with random orientation, used in many industrial sectors such as automotive, electrical,... Design and optimization of composite structures made of BMC meet difficulties due to the nature of this material and thus have not been integrated in the finite element software. This paper introduces a method to build and integrate a new computational model into finite element software (ABAQUS). The chosen model is a multi-scale homogenization model, which helps to calculate mechanical properties of composite materials by using the properties of the components and orientation tensor. This integration can be applied for prediction of composite properties on many kinds of materials, reducing time and cost for suppliers when it comes to optimization of mechanical properties.
Abstract: Bulk Moulding Compound (BMC) is a short fiber composite with random orientation, used in many industrial sectors such as automotive, electrical,... Design and optimization of composite structures made of BMC meet difficulties due to the nature of this material and thus have not been integrated in the finite element software. This paper introduces a...
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Determining the Optimized Repair Cycle Structure Considering the Repairing Cost and the Gamma-Percent Lifetime
Vo Trong Cang,
Nguyen Duc Toan,
Do Duc Tuan
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
33-40
Received:
18 December 2017
Accepted:
20 December 2017
Published:
25 December 2017
DOI:
10.11648/j.ijmea.s.2017050401.16
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Abstract: The paper presents the process of building a computer program to calculate the optimized repair cycle structure while considering the repairing cost and the gamma-percent lifetime. Examples have been taken for the cases of rolling stock details from the Vietnamese National Railway.
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Transportation Engineering Technology – A Review, Part III
Issue:
Volume 5, Issue 4-1, July 2017
Pages:
41-44
Received:
14 December 2017
Accepted:
18 December 2017
Published:
30 December 2017
DOI:
10.11648/j.ijmea.s.2017050401.17
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Abstract: The paper presents the literature review from the papers of two special issues “Transportation Engineering Technology” of the International Journal of Mechanical Engineering and Applications (IJMEA). The results of the studies, introduced here by the authors, have helped to determine which research problems related to the Transportation Engineering Technology are interested in Vietnam.
Abstract: The paper presents the literature review from the papers of two special issues “Transportation Engineering Technology” of the International Journal of Mechanical Engineering and Applications (IJMEA). The results of the studies, introduced here by the authors, have helped to determine which research problems related to the Transportation Engineering...
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