• Environmental and Resource Economics Review
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• v.24 no.4
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• pp.679-708
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• 2015

Almost all of natural gas demand in Korea is currently met by overseas LNG imports. More than 80% of LNG is imported through the mid to long-term contracts with oil-linked pricing. Despite LNG price estimation provides valuable information with various interested parties, an empirical study as well as an econometric model on LNG price hasn't yet been available in Korea. This paper therefore, aims at analyzing not only whether the long-run equilibrium relationship between oil prices and Korean LNG prices exists but also whether structural change occurred in such relationship. Further, it aims at building a conditional VECM taking account of a structural change. According to the final model, an oil price shock is passed through to the LNG prices in nonlinear and different manner from the past.

• Science of Emotion and Sensibility
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• v.4 no.2
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• pp.69-77
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• 2001

Positively biased asymmetry between positive and negative cognition is the basic assumption of heuristic human functioning. This article describes the SOM(states of mind) model for emotional judgement, a psycho-mathematical model built on affective-cognitive assessment research on the balance of positive and negative thoughts and feelings. The SOM model suggests that subjects on the average choose a positive over a negative pole with the probability 0.62 and the precise value of this constant coincides with algebraic “golden section” 　.618:.382. Statistical analyses of 32 normal subjects shows that the mean of SOM ratios of self-referent judgement and incidental recall task for positive/negative emotional words are .62(SD=.08) and .58(SD=.4). Also, the SOM ratios are significantly correlated with self-referent judgement for positive/negative emotional words. Implications of cognitive balance and future research directions for emotional science are discussed.

• Journal of Korean Society of Disaster and Security
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• v.7 no.1
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• pp.1-8
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• 2014

This research has been studied through the actual conditional investigation about street monitoring from January to December of 2013 in Seoul city primally. As the result of this research, it has been performed aleady the Seoul city's BIS (Balanced Index Score) goal of 2013. The 18,490 cases were reported through the street monitoring activities. Despite of increasing drastically for 1,151 cases's record of 2012, Street monitoring activity appeared wide variations in the region, ages, vocation and gender. Also it depended on 25 outstanding persons of merely 3.9%. They reported 13,880 cases that run to 75.1%. On the basis of Herbert W. Heinrich's Domino theory and law of 1:29:300, the dead of 54, seriously and the slightly injured of 1,573 and the latent injured of 16,275 were decreased by eliminating unsafe state. It respected and protected the 17,903 Seoul citizen's life. This study suggested a effective improvemental method of monitoring activity by dawing a problem through Seoul and Gangdong-gu street monitor comparative analysis.

• The Journal of the Korea Contents Association
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• v.13 no.4
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• pp.331-338
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• 2013

This study conducted the following experiment to examine change of physicopsychological function on Dynamic Trunk Control Exercise(3D-DTCE) and Static Trunk Control Exercise (STCE) to chronic low back pain patients subject for lumbago therapy and management. Physical function was measured by equlibrium and lumbar muscle activities and psychological function was measured by self-efficacy on comparative analysis of pre, post exercise and each groups in 30 lumbago patient subject. Equlibrium was measured by total, front back and left right sway index, lumbar muscle activities were measured by abdominal rectus and oblique abdominalis, erector spinae and self efficacy with lumbago patients was measured index of self efficacy. These result lead us to the conclusion that each group were statistically improved at all physicopsychological test. but equlibrium and lumbar muscle activities were more statistically improved at DTCE group and self efficacy with lumbago patients were not differanced on each group. Consequently, DTCE would be lead to positive increment of physical function more than STCE.

• Journal of The Korean Association For Science Education
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• v.18 no.4
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• pp.539-544
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• 1998

The consistency and balance of objectives by objective domains in units, sub-units and instructional units were investigated. The 6th elementary biology curricular teaching guidebooks were analysed. Domains of objectives are cognitive, inquiry process, instrumental skill, creative, affective and STS. Cognitive objectives were most dominant in all units, sub-units and instructional units. But no objective for creative domain were suggested. In unit and sub-unit, proportions of objectives were cognitive, inquiry process, affective, instrumental skill and STS domains in order. Objectives for cognitive and inquiry process domains were more than others in instructional units, Except cognitive and inquiry process domains, objectives for the others were not consistent in all units, sub-units and instructional units. Especially, the percentages of objectives for affective domain decreased in units, sub-units and instructional units orderly. These resulted from teaching objective domains categorized formally, Thus, it is necessary to develope curriculum and textbook to be consistent and balanced with objective domains and reflect upon the characteristics of them.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.2C
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• pp.112-118
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• 2011

In this paper, we conduct an objective performance analysis of the crosstalk cancellation scheme studied in [11]. While the conventional scheme is only applicable to a listener on the optimal listenable region (sweetspot), the space skew/crosstalk cancellation (SS/CC) scheme in [11] can mitigate crosstalk regardless of the listener's position by using listener position tracking (LPT) system. The SS/CC scheme is composed of two parts: LPT-based SS and CC parts. In this paper, the SS/CC scheme is evaluated by some criteria such as follows: condition number, and the balance characteristic, its root mean square error, and running average.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.670-675
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• 2018

There is a growing interest in EH-WSN (energy-harvesting wireless sensor networks) that can solve power problems in wireless sensor networks. In EH-WSN, on-off duty cycling is being studied in order to balance energy harvesting and consumption. However, the urgency of the sensed data and the energy harvesting rate in the environmental monitoring EH-WSN are important factors to determine the network performance. Therefore, it is necessary to control the duty-cycle period according to the importance of the sensed data and the energy harvesting rate in addition to simply maintaining the balance of the power. In this paper, we analyze the problem of on-off duty cycling in EH-WSN for environmental monitoring and propose an adaptive duty-cycle scheduling scheme considering the priority of sensed data and energy harvesting rate, where the priority of sensed data determined by sensed value and changing rate. The performance of scheduling scheme was analyzed by computer simulations.

• Journal of International Area Studies (JIAS)
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• v.22 no.1
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• pp.91-112
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• 2018

This study examined the dynamic relationship between urbanization and energy consumption in China. As an alternative to the conventional method of having the same integration of time series and large samples, ARDL method and Toda-Yamamoto causality analysis were applied. As a result, urbanization income, income, and energy consumption have a long-term stable equilibrium. Urbanization and income have a positive effect on energy consumption in the long run, but short-term changes of urbanization and income have no significant effect on energy consumption changes. The adjusted coefficient was -0.2395, which was statistically significant. In the causality test, income and energy consumption are useful to predict each other, but urbanization is exogenous because there are no causality with other variables. Since the process of urbanization in China has been proceeding slowly and deliberately by the government, it can be seen that the long-term effects of urbanization are clear and exogenous.

• International Area Studies Review
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• v.14 no.2
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• pp.61-78
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• 2010

The paper is basically attempted to reveal a possibility of monetary unification and setting an anchor currency in North East Asian economies such as South Korea, China, and Japan. The Cobb-Douglas utility function is tentatively built by a Walrasian economic framework. Korean Won(KRW) is represented for a numeraire in a structural model, and the estimation of a parameter is performed by 2SLS and GARCH-M models. Empirical evidence is found that not only monetary unification itself in this regime seems not to be practicable, but also setting an anchor currency by Chinese Yuan(CNY) or Japanese Yen(JPY) is also inappropriated due to the fact that the estimated parameter is not converged to a unity. Walrasian equilibria are enhanced by the convergence to a unity in the model. It also has to be mentioned that a number of necessary and sufficient conditions should be fulfilled prior to discuss a monetary unification in North East Asian economies. Instead, Asia currency unit(ACU) is more feasible in reality.

• International Area Studies Review
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• v.22 no.3
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• pp.201-219
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• 2018

This paper suggested a theoretical model, in which a security-based(secured loan, non-secured loan) credit agreement determines the form of corporate cost function through a loaning company's cost minimization in the light of a company which behaves monopolistically in product markets. Also, this paper analyzed the influence of a corporate credit agreement on market equilibrium, and economic welfare in product markets. As a result, it was found that in case a company, whose equity capital is small, implements borrowing based on a secured loan from a financial institution, the company comes to face borrowing restraints, in which the company has no choice but to get a loan within the scope of securities. When a company offers its capital goods, i.e. a production factor, as a security, there occurs a distortion to the production factor input ratio. Meanwhile, when a company comes to get a loan based on an unsecured loan, for which the interest rate is high, marginal cost rises; accordingly, the company comes to choose a credit agreement aiming at maximizing its profits. However, a company's choice of a credit agreement is not quite desirable from a consumer's viewpoint, and from the whole economic point of view; overall, such a choice is likely to aggravate economic welfare.