• 전기학회논문지
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• 제66권6호
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• pp.916-922
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• 2017

Security systems for inland cargo truck transportation are mostly limited to route tracking for safe and efficient transportation. With this route tracking system, the status of cargo trucks can be monitored easily within inland boundaries. In case of oil transportation by land, however, security systems ensuring transportation of a designated quantity of products have been subject to extensive research since thefts and substitution by a similar product in the transportation process have emerged as a social problem. Security devices installed in an oil tank truck must meet the explosion-proof performance standards and be applicable to varying types of trucks. Accordingly, a wireless electronic seal with RF communication functions is considered to be the most appropriate method, but e-seals on moving vehicles require such levels of performance and reliability that can overcome certain challenges including changing radio waves and topographical impediments. Considering these characteristics of oil tank trucks, this study proposes an stabilization method to enhance the RF communication performance of e-seals, based on radio simulation and experiment findings.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.599-608
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• 2021

The oil and gas industry is widely known as a vital engine of Vietnam development, stimulating researchers to examine the association of various factors with this industry. The aim of this study is to identify the relationship between different variables affecting profitability of the firms in the oil and gas sector in Vietnam. The total of 203 samples were collected from 29 companies listed on Vietnam Stock Market during a 6-year period from 2012 to 2018. Informed by prior research, this investigation employs financial leverage (FL), government ownership (GOV), dividend payout (DIV), fixed assets to total assets (FA) and exchange rate (EXR) as independent variables, while the profit is described by return-on-assets (ROA). The study results show that there are four factors that have an impact on ROA, namely, leverage, government ownership, dividend, and exchange rate. Whereas leverage and exchange rate have negative influence on ROA, government ownership and dividend payment have a positive effect. The findings of this study suggest that high debt ratio in capital structure and the negative effect of exchange rate on their companies' efficiency can adversely affect the profit of enterprises. Also, plausible extent of government ownership and dividend payment could also be considered to optimize corporate performance.

• 자원ㆍ환경경제연구
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• 제16권1호
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• pp.27-63
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• 2007

본 연구는 OPEC의 감산합의 또는 투기적 비축 등과 같은 전략적 또는 자발적 수출제약으로 인해 필요한 원유를 충분히 확보하지 못할 때 발생하는 원유공급 위기가 우리 경제에 미치는 효과를 분석하였다. 원유가격의 변화가 예측이 불가능한 현상으로 가정하고 외생적인 변수로 간주하는 기존의 연구와 달리, 본 연구는 자발적 수출제약으로 인해 원유가격이 내생적으로 결정되는 동태적 연산 가능 일반균형 모형을 이용하여 원유공급 위기에 따른 파급효과를 분석하였다. 본 연구의 분석시나리오는 IEA의 단계별 비상조치에 근거하여 원유공급량이 BaU 대비 7%와 12% 감소하는 경우로 설정하였다. 모의실험 결과 원유공급이 7%와 12% 감소하면 원유도입가격은 약 17.3%와 33.5% 증가할 것으로 예측된다. 이에 따른 경제성장률은 약 0.52%p와 0.96%p 감소하는 것으로 추정된다. 다시 말하면 원유도입가격이 1% 증가하면 경제성장률은 0.03%p 감소하는 것에 해당한다. 반면 소비자물가는 0.8%p와 1.51%p 증가하여, 원유도입가격이 1% 증가하면 소비자물가는 약 0.045% 증가할 것으로 예측된다. 원유공급 위기가 발생하면 전력의 생산량은 감소하고 전력가격은 수요 감소로 인해 1차년도에 약간 감소하다가 생산비용 증가효과로 인해 전력가격은 상승하는 것으로 추정된다. 전원 믹스에 미치는 효과를 살펴보면, 석유제품의존도가 높은 화력과 자가발전의 생산량 감소가 상대적으로 큰 것으로 나타난다. 원유의 공급위기로부터 직접적인 영향을 받는 석유제품은 큰 폭으로 하락하는 반면 석탄과 열에너지는 대체효과로 인해 오히려 소비량이 증가하는 것으로 추정된다. 액화천연가스는 당해 연도에는 경기침체와 함께 소비량이 줄어들지만 시간이 지날수록 석유와의 대체관계로 인해 소비량이 증가할 전망이다. 생산량이 대폭 감소하는 석유제품산업은 가격이 큰 폭으로 상승하여 판매액은 오히려 증가한다. 열에너지와 석탄산업은 대체효과로 인해 생산량이 증가하는 반면 그 외의 모든 산업은 원유공급 위기가 발생하면 생산량과 생산액 모두 감소하는 것으로 나타난다.

• The Journal of Asian Finance, Economics and Business
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• 제3권3호
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• pp.79-91
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• 2016

This paper is the first of its kind using a non-linear approach based on cross-correlation function (CCF) to investigate the information arrival hypothesis in crude palm oil (CPO) futures market. Based on daily data from 1986 to 2010, our empirical results reveal that: First, the volume of volatility is not a proxy of information flow. Second, dependence causality running from current return to future volume in conditional variance exhibit an asymmetric pattern of time span with different signs of correlation between price and volume series. This finding indicates the presence of noise traders' hypothesis of price-volume interaction in CPO futures market. Both findings suggest that this futures market is weak-form inefficiency. In terms of investors' behavior, they tend to change their expectations on current return based on errors made in previous trade in generating abnormal volume in the subsequent period. As implied, it is advisable for the investors devise their future trading strategies according to time span and changes of return.

• 수산경영론집
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• 제42권2호
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• pp.97-112
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• 2011

The coastal and offshore fishery to manage from a fishery permit system in our country at present seems to be a sign of lots problem, which are illegal fishing, a permit rent, non fishing vessel the purpose of vessel reduction, fishery compensation, tax exemption oil, the excessive occurrence of administrative cost due to differences during a period of a fishery permit. All the readjustment system for the permit has suggested an effective solution for a fishery permit management, the maintenance of a fishery order(the prevention of illegal fishery), the prevention of unused fishery, the entrance of new vessel in coastal fishery and it's system has prevent this problems in ahead. This paper has estimated an prevention convenience for an illegal spill of the tax exemption oil, actual effects of vessel reduction, the conservation of fishery resource for the future value and carried out an economic analysis to estimate compliance cost for the system introduction. Also, this study have analyzed throughly the coastal fishery situation and catched lots of issues on the management for the permit system. Especially, the problems improving the readjustment introduction for the permit have estimated the social and economic effects quantitatively and qualitatively with a calculated technique to classify various scenarios. This paper has judged correctly the term of validity for the permit to shorten as a result of the estimation and it will be to take the net convenience cost 1,655thousand million won. The results of this study have expect to provide a basic data to introduce the readjustment system for the permit.

• 패션비즈니스
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• 제20권4호
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• pp.88-95
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• 2016

This paper investigated to the effectiveness of an eco-friendly method for oiling cow leather. After leather was lac-dyed with a vegetable leather processing solution and a mordant, olive oil was used to treat the leather. Changes in surface color and dyeability, light fastness, rubbing fastness, and water fastness were measured. An increase in dyeability caused by the mordant appeared in all the samples. The dyeability of leatger treated with Cu-mordant was higher than that treated with Fe-mordant and Al-mordant, and the three times greater than when no mordant was used. Dyeability after oiling more than doubled compare with before oiling. An increase in dyeability by oiling was highe greater than doubled compared with before oiling. The non-mordant-treated samples exhibited a 5-fold increase in dyeability, and the other samples showed more than two times more dyeability than did non-oiled samples. A color difference of more than 20.0-fold appeared in all samples, and the differences in lightness and chroma were greater than were the differences in other color factors. The colors after oiling were measured R, P, and PB. Light fastness improved in all samples after oiling, and all of the measurements were reduced in the order of Fe-mordant> Cu-mordant> Al-mordant ${\geq}$non mordant.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.399-409
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• 2021

This study examines whether oil and gas companies comply with the requirements of the International Financial Reporting Standards (IFRS) 6 on Exploration and Evaluation (E&E) of Mineral Resources. For this purpose, a comprehensive checklist divided into eight different parameters was prepared by including every requirement of IFRS 6. While building on the previous studies, the annual reports of the top five Indian and top five Global companies engaged in this business have been investigated in detail against the checklist using content analysis as the research method. Results show that a majority of the companies (both Indian as well as global companies) have not been complying with the requirements of IFRS 6. In five out of eight parameters the companies have not complied with even half of the requirements. The overall compliance ratio is as low as 41.54 percent and 43.68 percent for Indian and Global companies respectively. While analyzing the non-compliance, it has been observed that despite having distinct accounting standards, different kinds of companies are reporting differently. Thus, it is not in line or consistent with the goal of IFRS i.e., to establish a universal language for the companies to prepare the accounting statements. The research findings identify the exact area of non-compliance while citing the relevant paragraph number of IFRS 6.

• 자원ㆍ환경경제연구
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• 제25권4호
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• pp.517-543
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• 2016

본 연구의 목적은 우리나라 기선권현망 멸치어업의 유류비 변동에 대한 영향을 분석하는 데 있다. 연구의 분석 방법으로, 우선 최대지속적어획량(MSY)을 추정하기 위하여 지수잉여 생산모형을 이용한다. 다음으로, 자유어업하에서의 유류비 변동에 대한 기선권현망어업의 생산자 잉여를 추정하기 위하여 생물경제모형을 적용한다. 본 연구의 분석 결과, 면세유 미지급으로 인한 유류비 상승은 기선권현망어업의 멸치 공급에 대한 생산자 잉여에 부정적 영향을 초래하는 것으로 나타났다. 그러나 기선권현망 멸치어업의 유류비 상승이 경영 상태가 좋지 못한 어업인의 퇴출을 유도함으로써 상기 어업의 어획노력량을 최대지속적어획량 수준의 어획노력량($F_{MSY}$) 이하로 감소시켜 멸치 자원의 회복과 더불어 잔존 어업자의 생산자 잉여를 개선시키는 효과를 유인하는 것으로 나타났다.

• Composites Research
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• 제36권3호
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• pp.217-223
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• 2023

본 연구에서는 폴리아크릴로니트릴계 탄소나노섬유 스펀지의 제조 및 오일 흡착 거동을 조사하였다. 제조된 탄소나노섬유 스펀지는 물과 기름의 혼합용액에서 우수한 선택적 오일 흡착 능력을 보였으며, 탄소나노섬유 스펀지의 재사용시 흡착 능력도 확인하였다. 또한, 흡착제 내부구조에 정렬된 채널을 형성함으로써, 모세관 현상에 의하여 빠른 오일 흡착 거동을 보이는 탄소나노섬유 스펀지를 제조할 수 있었다. 이후 사용 폐기된 탄소나노섬유 스펀지는 질소 분위기에서 800℃로 열처리하여, 4-아미노페놀의 전기화학적 검출을 위한 센서로의 가능성을 검토하였다.

• 무역학회지
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• 제46권2호
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• pp.19-38
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• 2021

This study aims to analyze the foreign asset leverage effect on Korean oil & gas companies' foreign profits and to maintain the appropriate foreign asset volume for reducing exchange risk. For a long time, large Korean companies, including oil companies, overheld foreign currency liabilities. For this reason, most large companies have been burdened to hedge exchange risk and this excess limit holding deteriorated total profit and reduced foreign currency asset management efficiency. Our paper proceeds in presenting a three-stage analysis considering diversified exchange risk factors through estimation on transformation of foreign transactions a/c including annual trends of foreign asset and industry specifics. We also supplement incomplete the estimation method through a practical hedging case investigation. Our research parts are differentiated on the analyzing four periods considering period-specifics The FER value of the oil firms ranged from -0.3 to +2.3 over the entire period. The results of the FER Value are volatile and irregular; those results do not represent the industry standard comparative index. The Korean oil firms are over the credit limit without accurate prediction and finance high interest rate funds from foreign-owned banks on the basis on a biased relationship. Since the IMF crisis, liabilities of global firms have decreased. Above all, oil firms need to finance a minimum limit without opportunity losses on the demand forecast and prepare for uncertainty in the market. To reduce exchange risk from the over-the-limit position, we must consider factors that affect the corporate exchange risk on the entire business process, including the contract phase.