• Journal of the Korean Home Economics Association
• /
• v.43 no.5 s.207
• /
• pp.81-91
• /
• 2005

The goal of this study was to investigate the daily manifestation of positive and negative affect states of early adolescent depression across daily interpersonal contexts. Forty-five boys and 44 girls in the second `year of middle schools participated and were classified into 3 groups according to CDI scores. Among 89 students 59 students in the highest or the lowest CDI groups continued to participate in the next step of this study. Using the Experience Sampling Method(ESM), the 59 students reported their affect states 6 times per day across four daily interpersonal contexts: the contexts alone, with all classmates, with a few friends, and with family members. The major findings were as follows. frst, the high CDI group felt more worried, angrier, more hurried, less happy, less interested, less control, and less relaxed than the low CDI adolescent group. Second, the negative affect states of the high CDI adolescent group did not vary across the interpersonal contexts, whereas their positive affect states were the highest in the context with a few friends. Implications of the findings were discussed in illuminating the phenomenology of adolescent depression.

• Korean Journal of Child Studies
• /
• v.16 no.2
• /
• pp.23-36
• /
• 1995

The goal of this study was to investigate how adolescents' daily experience of schoolwork and leisure activities relate to depression. A sample of 58 high school seniors reported the amount of time spent in daily activities and their affect states in these activities seven times a day for a week. To evaluate the relationship between daily life experience and depression Pearson correlation analysis was conducted. The significant zero order correlations were followed up by conducting partial correlation analyses using background variables as control variables. While the amount of time spent in schoolwork and leisure activities was not an important factor relating to depression, affect states in specific daily activities were related to levels of depression. In particular, affect states during schoolwork activities were related to depression; however, these states during leisure activities were unrelated to depression. These findings suggest that the everyday manifestation of adolescent depression was not prevalent across daily contexts, but was limited to a specific context.

• International Commerce and Information Review
• /
• v.12 no.3
• /
• pp.267-288
• /
• 2010

The collapse of housing market bubble in United States had a considerable impact on the world economy. The collapse of housing market bubble in United States generates the global financial crisis at the worldwide level. The housing market bubble question the efficacy of fundamental proposition of orthodox economics based on the rationality of human choice. According to neuroeconomics and neuroscience, emotion and affect play the important role in purchasing the commodity in retails market. On the basis of the neuroeconomics, this study focuses on the role of affect and emotion in the purchase of subprime loan in United States. Robert Schiller suggests that one of the causes of housing market bubble is the contagion effect of human belief in the society. The structure of this paper is as follows. First, this study investigates the mechanism of human brain and role of various neurons to influence the human behavior in the purchase of house in United States, such as Dophamine neuron and mirroring neuron. Second, this study shows the possibility that the mirror neuron might explain the contagion of human belief in housing transaction market. It can be a seed of housing market bubble. Furthermore, this study show the implications of neuroeconomics is suggestive to the negotiation process in commercial policy in United States.

• Land and Housing Review
• /
• v.11 no.4
• /
• pp.115-124
• /
• 2020

Incentive/Disincentive (I/D) contract is designed for minimizing any disruption of traffic flow in road construction projects. I/D contracting projects have been evaluated with regard to time and cost performance in various states, more than 35 states. However, construction project managers and planners have little understanding of the project factors that affect the project time and cost performance of highway construction projects using I/D regulations. Therefore, the purpose of this research is to find factors that affect I/D project success or failure to improve the decision-making process for the implementation of I/D projects. In order to achieve the objectives of this research, the researchers collected I/D road construction project data from FDOT and performed evaluation for each collected project. Then, project data analysis to identify key factors that affect I/D project performance was performed. In conclusion, five significant factors for project time performance and six significant factors for project cost perfornace were identified and summarized.

• Korean Journal of Child Studies
• /
• v.17 no.1
• /
• pp.137-152
• /
• 1996

The goal of this study was to investigate how daily experiences of schoolwork and leisure activities explained cultural differences in levels of adolescent depression. A combined sample of 58 high school seniors in Korea and 62 high school seniors in the United States reported time use patterns and affect states in daily activities and levels of depression. The time use pattern in daily independent study during class hours and in active leisure activities significantly explained cultural differences in levels of depression. Affect states in all schoolwork activities and passive leisure activities also significantly explained cultural differences in levels of depression. These findings suggest that Korean adolescents' experience of 'exam hell', particularly the lack of active leisure activities and more negative emotional experiences of daily activities are partly responsible for their higher depression relative to American counterparts.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.718-722
• /
• 2006

The dependence of n-channel 2 shot SLS poly-Si TFT characteristics on the DOS (density of states) parameters was investigated by using a device simulation. Device performances were most sensitive to the DOS of poly-Si/gate insulator (GI) interface and poly-Si active layer. Deep level states at the poly-Si/GI interfaces strongly affect the subthreshold slope.

• Journal of Mechanical Science and Technology
• /
• v.17 no.10
• /
• pp.1443-1449
• /
• 2003

Primary goal of adaptive observers would be to estimate the true states of a plant. Identification of unknown parameters is of secondary interest and is achieved frequently with the persistent excitation condition of some regressors. Nevertheless, two problems are linked to each other in the classical approaches to adaptive observers; as a result, we get a good state estimate once after a good parameter estimate is obtained. This paper focuses on the state estimation without parameter identification so that the state is estimated regardless of persistent excitation. In this direction of research, Besancon (2000) recently summarized that most of adaptive observers in the literature share one common canonical form, in which unknown parameters do not affect the unmeasured states. We enlarge the class of linear systems from the canonical form of (Besancon, 2000) by proposing an adaptive observer (with additional dynamics) that allows unknown parameters to affect those unmeasured states. A recursive algorithm is presented to design the proposed dynamic observer systematically. An example confirms the design procedure with a simulation result.

• Asia pacific journal of information systems
• /
• v.32 no.2
• /
• pp.307-326
• /
• 2022

Currently, Mobile-commerce is active around the world, and consumers' online activities have changed significantly from pc-base to mobile-base. Unlike IT advanced countries such as the United States, which experienced PC-based online commerce (hereafter, PC-commerce) before Mobile-commerce, developing countries such as Vietnam have a relatively short history of PC-commerce. Consumers' experience with PC-commerce may affect their acceptance and use of Mobile-commerce. In this study, we tried to see if different online commerce histories differently affect consumers' online purchasing behavior. We selected the United States and Vietnam, with longer PC-commerce experience and shorter one, respectively. Data were collected for the following four groups: 1) the U.S. PC-commerce (n=256), 2) the U.S. Mobile-commerce (n=283), 3) the Vietnamese PC-commerce (n=159), and 4) the Vietnamese Mobile-commerce (n=225). As results, it was first confirmed that different e-commerce histories in developed and developing countries make the online shopping process different. Second, navigability has a huge impact on consumers' decision support satisfaction in Vietnam where PC-commerce history is shorter. Third, we identified that pre-purchase phase is more related with decision support satisfaction and that purchase phase is more related with task support satisfaction.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.14 no.4
• /
• pp.60-65
• /
• 2006

An aeronautical study is a study of an aeronautical problem to identify possible solutions and select a solution that is acceptable without degrading safety. ICAO and the member states have established the standards regarding the obstacle limitation and regulated the construction of the man-made structures in and beyond the standards. Any obstacles that extend above a standards should as far as practicable be removed except after aeronautical study it is determined that the object would not adversely affect the safety or significantly affect the regularity of operations of airplanes. However ICAO and most member states does not established provisions of the scope and implement procedures of aeronautical study. Recently, Civil Aviation Regulations in Korea specify the provisions relevant to aeronautical study. The Prime objectives of this comparative study are to improve the domestic provisions for aeronautical study caused by obstacle limitation through the investigate the international standards and regulations.

• YAKHAK HOEJI
• /
• v.39 no.3
• /
• pp.329-336
• /
• 1995

Conformational free energy calculations using an empirical potential function and a hydration shell model(program CONBIO) were carried out on hypoglycemic agent acetohexamide and tolazamide in the unhydrated and hydrated states. The initial geometry of sulfonylureas was obtained from X-ray crystallographieal data and homologous molecular fragments. In both states, the feasible conformations were obtained from the calculations of conformational energy, conformational entropy, and hydration free energy by varying all the torsion angles of the molecules. From the calculation results, it is known that the conformations] entropy is the major contribution to stabflize the low-free-energy conformations of two sulfonylureas in both states. But, in hydrated state, the hydration does not directly affect each conformations. The intramolecular hydrogen bonding of sulfonylurea hydrogen and 7-membered nitrogen appeared to the conformations of tolazamide in both states. It is thought that the hydrogen bonding decrease steric hindrance on the receptor binding direction. The substitution of alicyclic or N-heterocyclic ring than that of carbons chain of urea moiety may be properly interaction between sulfonylureas and the putative pancreatic receptor.