• Proceedings of The Korean Society of Health Promotion Conference
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• 2001.09a
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• pp.27-52
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• 2001

Over the past few decades, dramatic socioeconomic developments have resulted in the change of epidemiological transition from infectious to chronic diseases as leading causes of death in Korea. Behavioral factors, particularly smoking, diet and activity patterns, alcohol consumptions are among the most prominent contributors to mortality. Since after landmark reports on health promotion in Canada and USA during the 1970s and 1980s, which heralded the commitment of governments to health promotion, many studies have been made on it.

• Transactions of the Korean hydrogen and new energy society
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• v.7 no.1
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• pp.71-79
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• 1996

Yttrium thin film, 580nm thick, was prepared by electron beam evaporation. Film was hydrogenated room temperature upto 40 bar hydrogen pressure, without any activation process. Hydrogen concentration was determined by a quartz-crystal microbalance(QCM) method. YH2.9 sample was made without any pulverization. Electrical resistance was measured by four-point DC method in the temperature range between room temperature and 30K for various hydrogen concentration, x=0 to 2.9 of YHx sample. Temperature dependent resistance of YH2.9 shows low temperature minimum at 105K, the metal-semiconductor transition at 260K, and a hystersis above 210K.

• Journal of the Korean Institute of Educational Facilities
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• v.16 no.3
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• pp.49-58
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• 2009

This study is carried out to understand application type and change of learning space and to find out actual situation of management in open planned elementary schools. The twelve elementary schools were selected based on case studies and fundamental data of the agencies performing basic plan, the actual situation of management was studied by interviews of principals and teachers. By the results, open planned elementary schools have been notably reduced after the year of 2004 and corridor expending type was broadly chosen as a plane type for open space. It was also shown that learning space was transformed to the independent type integrating open space to the unit classroom in most part of twelve cases. In addition, whole sliding doors fixed in open classrooms by some Provincial Office of Education didn't need certain physical shut-offs, and it was considered as one of useful alternatives to manage open space.

• Journal of the Korean Home Economics Association
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• v.49 no.3
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• pp.55-66
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• 2011

The purpose of this study was to examine the effects of We Start home visiting intervention program on the positive changes of infants and their low-income families. The subjects were 171 18~36-month olds and their mothers living in We Start and non We Start areas. The instruments used were Developmental Profile, Cleminshaw-Guidubaldi Parent Satisfaction Scale(CGPSS) and Home Observation for Measurement of the Environment(HOME). The results were as follows: First, the result of Developmental Profile showed positive changes in all domains(physical development, self-help skills, social development, cognitive development, and communication ability). Second, the result of CGPSS showed positive effects on parent-child relationships. Third, the result of HOME showed positive effects on mothers' emotional and language responses. In conclusion, We Start home visiting program for infants from low-income families is an effective early intervention program to end intergenerational transition of poverty in Korea.

• Journal for History of Mathematics
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• v.24 no.2
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• pp.17-30
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• 2011

This study inquires into the change between two method of indivisibles, which Cavalier suggested. To cope with the objection of use of indivisibles, he modified his first method of indivisibles. Through the analysis of this transition, this study reveals the feature that Cavalier changed into reflecting the density of the figures so as to avoid the paradox related to the indivisibles and this change has the aspect of incomplete lemma-incorporation method according to Lakatos' theory.

• Journal of the Korean Society for Library and Information Science
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• v.35 no.4
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• pp.177-196
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• 2001

Internet, the heart of information network in information society, functions as a major communication tool, and the use of language through internet has become an unavoidable reality. In that context, this study builds a theoretical base on the use of language in internet, analyzes inappropriate use of language in internet in terms of 'sound', 'grammar', and 'meaning'; discusses, based on the findings, 'digital thinking', 'user transition', and 'netiquette and information education'.

• Journal of computational fluids engineering
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• v.21 no.3
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• pp.64-70
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• 2016

Multiple solutions in natural convection of water with Pr=7 between two horizontal plates with small magnitude non-uniform temperature distribution in the upper plate is numerically investigated. The dimensionless temperature of upper plate is ${\theta}={\epsilon}sinkx$. Two upright cells are formed over one wave length in the conduction-dominated regime of small Rayleigh number. However, multicellular convection occurs above a critical Rayleigh number for small wave number. When k = 1.5, dual solutions are found and a transition of $6{\rightarrow}4$ eddy flow occurs with decrease of Rayleigh number. When k = 0.75, two, three, four and five multiple solutions are observed. Transitions of $14{\rightarrow}12$, $12{\rightarrow}10$, $10{\rightarrow}8$ and $6{\rightarrow}8$ eddy flow occur with decrease of Rayleigh number.

• Applied Science and Convergence Technology
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• v.24 no.6
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• pp.215-218
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• 2015

A pyroelctric properties of Ni(x)-doped PMNT systems were analyzed. Modified PMNT samples were prepared using the columbite structure method. Pyroelectric current, polarization, dielectric constant and dissipation factor of Ni-doped PMNT samples were measured as a function of temperature. By adding a small amount of NiO, pyroelectricity of PMNT is increased. Unlike the normal $ABO_3$ ferroelectric, Ni-doped PMNT showed properties for relaxor ferroelectric of causing the successive phase transition over a wide temperature. The optimum conditions for obtaining compositions with improvement ferroelectric properties are a nominal addition of 0.02 mole% Ni. Also, Ni-doped PMNT ferroelectric showed excellent pyroelectric figures of merit in the vicinity of room temperature. The pyroelectric coefficient ($0.00524C/m^2K$ at $25^{\circ}C$) and figures of merit ($F_v{\sim}0.039m^2/C$ and $F_d{\sim}0.664{\times}10^{-4}Pa^{-1/2}$) of composition PMNT with 0.02 mole% Ni are comparable to the earlier reports on lead-type pyroelectrics.

• Korean Journal of Child Studies
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• v.27 no.1
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• pp.1-15
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• 2006

The purpose of this study was to examine the reliability and validity of the School Adjustment Inventory for 1st grade elementary school students(SAI-1st Grade). The subjects of this study were 624 first grade children attending 40 elementary schools and 120 first grade teachers of G City. Data were analyzed by Factor Analysis(EFA), Confirmatory Factor Analysis(CFA), Pearson's r and Cronbach's ${\alpha}$. Results of the test on content validity as evaluated by the first grade teachers was high. It was found that the School Adjustment Inventory for 1st graders of elementary school was a reliable and valid measure for evaluating the school adjustment of first grade students.

• Bulletin of the Korean Chemical Society
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• v.24 no.1
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• pp.91-94
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• 2003

Kinetic studies of the reaction of O-methyl-S-phenylthiocarbonates with benzylamines in methanol at 45.0 ℃ have been carried out. The reaction proceeds by a stepwise mechanism in which the rate-determining step is the breakdown of the zwitterionic tetrahedral intermediate, $T^{\pm}$, with a hydrogen-bonded four-center type transition state (TS). These mechanistic conclusions are drawn based on (ⅰ) the large magnitude of ${\rho}_X\;and\;{\rho}_Z$, (ⅱ) the normal kinetic isotope effects $(k_H/k_D\;>\;1.0)$ involving deuterated benzylamine nucleophiles, (ⅲ) the positive sign of ${\rho}_{XZ}$ and the larger magnitude of ${\rho}_{XZ}$ than that for normal $S_N2$ processes, and lastly (ⅳ) adherence to the reactivity-selectivity principle (RSP) in all cases.