Subsonic Wind Tunnels in Malaysia: A Review

2012 ◽  
Vol 225 ◽  
pp. 566-571 ◽  
Author(s):  
Surjatin Wiriadidjaja ◽  
Fadilah Hasim ◽  
Shuhaimi Mansor ◽  
Waqar Asrar ◽  
Azmin Shakrine Mohd Rafie ◽  
...  

In Malaysia, there exist wind tunnels operated by several universities and organizations. Most of them are actively used for a variety of experimental works that are needed by uncounted educational curricula and aerodynamics related researches. Lately, wind tunnels have even become increasingly accepted as one of common engineering tools in solving of unexpected and abundant wind engineering problems that are continually facing automotive industries, oil and gas companies, as well as governmental agencies and ministries. This paper is meant to present an overview of the existing wind tunnels, accompanied with information on some important technical data, and added, to a lesser extent, with complementary information about backgrounds and design philosophies. The emphasis is, however, given only to those with test section size of 1.0 square meter or larger. From the general point of view, some information about testing capabilities and trends in wind tunnel technology is also presented.

2015 ◽  
Vol 2015 (5) ◽  
pp. 46-67
Author(s):  
Evgeniy Shvarts ◽  
Aleksey Knizhnikov ◽  
Alexandr Pakhalov ◽  
Marina Sheresheva

The paper analyses methodological features and results of the first Russian oil and gas companies environmental rating. This rating is relevant because Russian oil and gas industry plays a key role in the national economy and at the same time it is unfavorable and nontransparent from an environmental point of view. Our study aims to provide a comparative assessment of environmental responsibility of oil and gas companies operating in Russia. The study is based on a comprehensive analysis of qualitative and quantitative corporate indicators in three areas: environmental management, environmental impact and disclosure. Results of the rating indicate a high differentiation among Russian oil and gas companies in terms of environmental responsibility and transparency. Public listing of shares as well as linkages between shareholders and regional communities are among factors that have positive impact on the level of environmental responsibility of oil and gas companies.


2019 ◽  
Vol 1 (1) ◽  
pp. 63
Author(s):  
Yulida Nuraini Santoso

This article aims to explain how and why foreign oil and gas companies carry influence over the government in the upstream oil and gas sector. It looks at the troubling issue of domination in Indonesia particularly before the Gross Split mechanism was introduced. From a transnational point of view, states and non-states continuously attempt to overpower the other to gain the most from this industry. Although the roles and obligations of foreign oil and gas companies are strictly regulated, domination is still visible in areas of cost recovery to add to the weak domestic market resulting in an asymmetric competition. Market failures have become increasingly alarming as liftings continue to fail to reach the national quota. Using the introduction of the Gross Split mechanism as a turning point, this article looks back at how transnationalism has translated into this sector. This article is of the view that the lack of effort to enrich knowledge bases, enforce the adoption of appropriate technology and prepare its domestic market for healthy competition, has brought it further away from addressing its underlying issues.


Author(s):  
A. Baronnet ◽  
M. Amouric

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.


2019 ◽  
Vol 18 (5) ◽  
pp. 925-943
Author(s):  
I.V. Filimonova ◽  
◽  
L.V. Eder ◽  
V.Yu. Nemov ◽  
M.V. Mishenin ◽  
...  

2020 ◽  
Vol 23 (11) ◽  
pp. 1291-1312
Author(s):  
N.V. Zyleva

Subject. This article discusses the practice of ensuring the economic security of oil and gas companies operating under the terms of production sharing agreements, where minerals are the object of security. Objectives. The article aims to justify the need to apply professional judgment in the organization of reliable accounting of minerals, explored and extracted under the terms of the production sharing agreement implementation, to avoid various risks to the entity's economic security. Methods. For the study, I used the methods of deduction and modeling. Results. The article presents proposals to arrange accounting of intangible exploration assets (geological information on mineral reserves) and finished products (the part of the extracted minerals owned by the investor and the part owned by the State). Conclusions. As strategic minerals, oil and gas are the targets of various economic risks. Professionals familiar with the specifics of accounting operations in the implementation of the production sharing agreement should be prepared to prevent these risks. The results obtained can be used to design accounting policies and develop local regulations on the tasks and functions of the economic security service of the organization implementing the production sharing agreement.


2020 ◽  
Vol 19 (6) ◽  
pp. 1101-1120
Author(s):  
O.V. Shimko

Subject. The article investigates key figures disclosed in consolidated cash flow statements of 25 leading publicly traded oil and gas companies from 2006 to 2018. Objectives. The focus is on determining the current level of values of the main components of consolidated statement of cash flows prepared by leading publicly traded oil and gas companies, identifying key trends within the studied period and factors that led to any transformation. Methods. The study draws on methods of comparative and financial-economic analysis, as well as generalization of materials of consolidated cash flow statements. Results. The comprehensive analysis of annual reports of 25 oil and gas companies enabled to determine changes in the key figures and their relation in the structure of consolidated cash flow statements in the public sector of the industry. It also established main factors that contributed to the changes. Conclusions. In the period under study, I revealed an increase in cash from operating activities; established that capital expenditures in the public sector of the industry show an overall upward trend and depend on the level of oil prices. The analysis demonstrated that even integrated companies’ upstream segment prevail in the capital expenditures structure. The study also unveiled an increase in dividend payments, which, most of the time, exceeded free cash flows thus increasing the debt burden.


2020 ◽  
Vol 26 (7) ◽  
pp. 1571-1589 ◽  
Author(s):  
O.V. Shimko

Subject. This article explores the key liquidity figures of the twenty five largest public oil and gas companies between 2006 and 2018. Objectives. The article aims to determine the current values of the key liquidity figures of the largest public oil and gas companies, identify key trends in their changes within the study period, and identify the factors that have caused these changes. Methods. For the study, I used comparative, and financial and economic analyses, and generalization. Results. Based on a comprehensive analysis of the twenty five oil and gas companies' annual reports, the article identifies trends in the changes in the key liquidity indexes in the industry's public sector, and establishes the main factors that affected these changes. Conclusions and Relevance. The largest public oil and gas companies are able to maintain their own liquidity in times of crisis, even. The industry pays the most attention to increasing the instant liquidity ratios. The results of the study can be used to evaluate, forecast, and develop measures to enhance the liquidity of public oil and gas companies.


2020 ◽  
Vol 26 (12) ◽  
pp. 2765-2789
Author(s):  
O.V. Shimko

Subject. This article explores the market valuation ratios of the twenty five leading public oil and gas companies between 2006 and 2018. Objectives. The article aims to identify key trends in the changes in market valuations of the largest public oil and gas companies, and identify the factors that have caused these changes. Methods. For the study, I used comparative, and financial and economic analyses, and generalization of materials of the companies' consolidated financial statements. Results. The article shows certain changes in the main indicators of market valuation of the leading public oil and gas companies and identifies the main factors that contributed to these changes. It establishes that the most significant for comparison and valuation are ratios based on balance sheet values of assets and equity, and EBITDA, DACF and net income ratios are appropriate as auxiliary ratios. The article says that the exchange segment of the industry has increased the debt load, so instead of market capitalization as a component of the coefficients of this group, it is advisable to apply the company's value indicator. Conclusions and Relevance. The article concludes that the market sentiments towards the stock market segment of the global oil and gas industry are getting impaired. This is quite natural against the background of falling profitability of most leading companies. The results of the study can be useful in evaluating, forecasting and developing measures to increase the market capitalization and value of public oil and gas companies.


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