• Coupled systems mechanics
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• v.8 no.1
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• pp.55-70
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• 2019

This investigation is focused on the variations in transversely isotropic thick circular plate due to time harmonic thermomechanical sources. The homogeneous thick circular plate in presence and absence of energy dissipation and two temperatures has been considered. Hankel transform is used for solving field equations. The analytical expressions of conductive temperature, displacement components, and stress components are computed in the transformed domain. The effects of frequency at different values are represented graphically. Some specific cases are also figured out from the current research.

• Journal of the Korean Wood Science and Technology
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• v.24 no.1
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• pp.11-16
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• 1996

The purpose of this paper is to present a summary of assignment design values according to domestic softwood structural lumber grading rules. Allowable stresses for visually graded lumber were determined from basic data on small. clear specimens. The data corrected for variability such as natural defects and other factors. The procedure adopted by Japan was used for assigning allowable design values. Strength ratios in relation to each defect were taken from ASTM D 245-81. Korean pine(Pinus koraiensis S. et Z.), Korean red pine(Pinus densiflora S. et Z.), Japanese larch(Larix leptolepis Gordon) and Needle fir(Abies holophylla Max) were applied to this study. The calculated allowable stresses were same in Korean pine and Korean red pine. These values were highest in Japanese larch lowest in Needle fir. So, it is desirable for these species to be classified into different catagories Species Group. However, accurate comparison in design values on lumber grading rules among U.S., Japan and Korea was somewhat difficult. And full scale testing will be necessary for accurate determination of the correction factors to setting up design values.

• Journal of the Korean Home Economics Association
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• v.20 no.2
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• pp.53-63
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• 1982

The purpose of this study were; (1) to investigate the relationship between the general values and 3 aspects of clothing behaviors. (2) to investigate attitudes toward Korean clothing between students and their mothers. General values were measured by the Allport-Vernon-Lindzey Study of Values(Part 1 only), which determines relative prominence of six basic values. Three aspects of clothing behaviors were assessed by statements dealing with satisfaction, exhibitionism, and fashion. Korean clothing measures consisted of statements dealing with positive and negative attituded toward psychological and practical aspects. The samples consisted of 200 students(student group) and 100 mothers (mother group) in Daejon. The data were analyzed by correlation and t-values. The results obtained through this study were as follows: 1) Positive relationship were found between: (1) Aesthetic value and the exhibitionism of clothing, (2) Aesthetic value and the fashion of clothing. Negative relationships existed between (1) Theoretical value and the exhibitionism of clothing, (2) Economic value and the fashion of clothing, (3) Social value and the fashion of clothing. 2) Significant differences were found between two groups(students and their mothers) : Economic, aesthetic, and political values as well as exhibitionism and fashion in clothing behaviors. 3) In general, highly positive attitude toward Korean clothing was found on psychological aspect, while highly negative attitude was found on practical aspect. Significant differences were found between two groups; (1)‘Graceful’of psychological aspect and‘economic’,‘inexpensive’of practical aspect in positive attitudes toward Korean clothing, (2)‘Unsuitable to current life style’,‘not modern’and‘not beautiful’of psychological aspect in negative attitudes toward Korean clothing.

• Bulletin of the Korean Chemical Society
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• v.35 no.11
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• pp.3181-3187
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• 2014

A series of 3,4-dihydroquinazoline derivatives with anti-cancer activities against human colon cancer HT-29 cell were subjected to three-dimensional quantitative structure-activity relationship (3D-QSAR) studies using the comparative molecular similarity indices analysis (CoMSIA) approaches. The most potent compound, BK10001 was used to align the molecules. As a result, the best prediction was obtained with CoMSIA combined electrostatic, hydrophobic, and hydrogen-bond acceptor fields ($q^2=0.648$, $r^2=0.882$). This model was validated by an external test set of six compounds giving satisfactory predictive $r^2$ values of 0.879. This model would guide the design of potent 3,4-dihydroquinazoline derivatives as anti-cancer agent for the treatment of human colon cancer.

• Journal of Agricultural Extension & Community Development
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• v.28 no.2
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• pp.69-83
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• 2021

Under the premise of unbalanced development between urban and rural areas, this study raised criticism that the balanced national development policies in South Korea, which had been promoted in earnest after 'the Participatory Government' has adversely deepened the development gap between urban and rural areas by promoting the development of urban. In the meantime, the agricultural economy that supported the rural economy has gradually collapsed after reckless market opening, and due to the balanced national development policy focusing on urban infrastructure construction, rural areas are facing a crisis of 'depopulation' and 'regional extinction.' For this reason, many local governments have recently recognized the public values of agriculture and have introduced 'agrarian basic income' for the sustainability of agriculture. However, there is a limit to overcoming the crisis in rural areas because the population of farmers among rural residents is only 25%. Therefore, this study proposes the necessity of introducing the basic income for rural residents as a new paradigm for balanced development between urban and rural areas beyond the existing policy limits, based on surveys of opinions of residents living in Chungchengnam-do, South Korea and experts on the introduction of 'basic income for rural residents' in the future.

• Nuclear Engineering and Technology
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• v.53 no.8
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• pp.2576-2581
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• 2021

The thermal stability and crystallization behaviors of La₂O₃ containing B₂O₃-CaO-Al₂O₃ glass waste forms were investigated to evaluate the stability of waste form during emergencies in deep geological disposal. For glasses containing 15% La₂O₃, LaBO₃ phases were observed as major crystals from 780 ℃ and exhibited needlelike structures. Al, Ca, and O were homogeneously distributed throughout the entire specimen, while some portions of B and La were concentrated in some parts. By differential thermal analysis at various heating rates, the activation energy for grain growth and the crystallization rate of LaBO₃ were calculated to be 12.6 kJ/mol and 199.5 kJ/mol, respectively. These values are comparable to other waste forms being developed for the same purpose.

• Journal of Integrative Natural Science
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• v.7 no.3
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• pp.200-207
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• 2014

Average number of samples to signal (ANSS) and average time to signal (ATS) are the most widely used criterion for comparing the efficiencies of the quality control charts. In this study the method of evaluating ANSS and ATS values of the multivariate exponentially weighted moving average (EWMA) control charts with Markov chain approach was presented when the production process is in control state or out of control state. Through numerical results, it is found that when the number of transient state r is less than 50, the calculated ANSS and ATS values are unstable; and ATS(r) tends to be stabilized when r is greater than 100; in addition, when the properties of multivariate EWMA control chart is evaluated using Markov chain method, the number of transient state r requires bigger values when the smoothing constatnt ${\lambda}$ becomes smaller.

• Korean Journal of Poultry Science
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• v.14 no.1
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• pp.63-68
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• 1987

To obtain the basic data applicable for the breed preservation, hemogram and blood chemical values in Korean native Ogol fowls were investigated. The results obtained were summarized as follows; 1. Erythrocytic and leukocyte counts did not show the significant differences along with growth and further differences in both male and female were not significant. 2. In blood chemical values, total Protein and blood glucose showed a tendency of increase with age in both sexes and cholesterol figured constant level at any ages in both sexes. In general, however, the values of cholesterol of male were higher than those of female.

• Journal of the Korean Statistical Society
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• v.35 no.2
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• pp.167-177
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• 2006

An important role of statistical analysis in science is interpreting observed data as evidence, that is 'what do the data say?'. Although standard statistical methods (hypothesis testing, estimation, confidence intervals) are routinely used for this purpose, the theory behind those methods contains no defined concept of evidence and no answer to the basic question 'when is it correct to say that a given body of data represent evidence supporting one statistical hypothesis against another?' (Royall, 1997). In this article, we use likelihood ratios to measure evidence provided by record values in favor of a hypothesis and against an alternative. This hypothesis is concerned on mean of an exponential model and prediction of future record values.

• Korean Journal of Veterinary Service
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• v.15 no.2
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• pp.128-133
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• 1992

To obtain the basic data for blood chemistry, the effects of the time elapse of serum separation on bovine blood chemical values were investigated. The results obtained are summerized as follows : 1. The constant fluctuation tendency and significance was not detected in GOT, GPT, BUN, Creatinine, ALP, CPX, Cholesterol, Ca, Mg and Pi. 2. Glucose showed the decrease tendency according to the time elapse of serum separation. As the values at 12 and 24 hours showed significant lower values than those at 1 and 2 hours (p＜0.01) it was thougth that separation time of serum should be focussed for the glucose determination.