• Bulletin of the Korean Mathematical Society
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• v.61 no.1
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• pp.117-133
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• 2024

Let 𝓟 = {X_i : i ∈ I} be a partition of a set X. We say that a transformation f : X → X preserves 𝓟 if for every X_i ∈ 𝓟, there exists X_j ∈ 𝓟 such that X_if ⊆ X_j. Consider the semigroup 𝓑(X, 𝓟) of all transformations f of X such that f preserves 𝓟 and the character (map) χ^(f): I → I defined by i_χ^(f) = j whenever X_if ⊆ X_j is bijective. We describe Green's relations on 𝓑(X, 𝓟), and prove that 𝒟 = 𝒥 on 𝓑(X, 𝓟) if 𝓟 is finite. We give a necessary and sufficient condition for 𝒟 = 𝒥 on 𝓑(X, 𝓟). We characterize unit-regular elements in 𝓑(X, 𝓟), and determine when 𝓑(X, 𝓟) is a unit-regular semigroup. We alternatively prove that 𝓑(X, 𝓟) is a regular semigroup. We end the paper with a conjecture.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1525-1528
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• 2008

High-luminance CNT-FED character-displays using simple line-rib-structure was performed. One display-panel had $48{\times}480$-dots and the sub-pixel pitch was 1mm. Another panel had $32{\times}256$-color-pixels, and the subpixel size was $0.6mm{\times}1.8mm$. The power consumption was less than 10W at character-displaying module. It should be useful for public display even under emergent no-power condition.

• Journal of Broadcast Engineering
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• v.27 no.3
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• pp.391-401
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• 2022

As deep learning-based object detection and recognition research have been developed recently, the scope of application to industry and real life is expanding. But deep learning-based systems in the construction system are still much less studied. Calculating materials in the construction system is still manual, so it is a reality that transactions of wrong volumn calculation are generated due to a lot of time required and difficulty in accurate accumulation. A fast and accurate automatic drawing recognition system is required to solve this problem. Therefore, we propose an AI-based automatic drawing recognition accumulation system that detects and recognizes steel materials in construction drawings. To accurately detect steel materials in construction drawings, we propose data augmentation techniques and spatial attention modules for improving small object detection performance based on YOLOv4. The detected steel material area is recognized by text, and the number of steel materials is integrated based on the predicted characters. Experimental results show that the proposed method increases the accuracy and precision by 1.8% and 16%, respectively, compared with the conventional YOLOv4. As for the proposed method, Precision performance was 0.938. The recall was 1. Average Precision AP_0.5 was 99.4% and AP_0.5:0.95 was 67%. Accuracy for character recognition obtained 99.9.% by configuring and learning a suitable dataset that contains fonts used in construction drawings compared to the 75.6% using the existing dataset. The average time required per image was 0.013 seconds in the detection, 0.65 seconds in character recognition, and 0.16 seconds in the accumulation, resulting in 0.84 seconds.

• Proceedings of the KIEE Conference
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• 1989.07a
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• pp.473-476
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• 1989

This paper proposes the recognition of Korean character by using the given pre-segmented area. For higher processing speed, we introduce the techniques for pruning the unused segments. And, new thinning algorithm is used for finding skeleton of each segment.

• Bulletin of the Korean Mathematical Society
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• v.57 no.4
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• pp.973-990
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• 2020

For the question "when is E(_RR) a flat left R-module for any ring R?", in this paper, we deal with a class of modules partaking in the hierarchy of injective and cotorsion modules, so-called Harmanci injective modules, which turn out by the motivation of relations among the concepts of injectivity, flatness and cotorsionness. We give some characterizations and properties of this class of modules. It is shown that the class of all Harmanci injective modules is enveloping, and forms a perfect cotorsion theory with the class of modules whose character modules are Matlis injective. For the objective we pursue, we characterize when the injective envelope of a ring as a module over itself is a flat module.

• Bulletin of the Korean Chemical Society
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• v.32 no.3
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• pp.934-938
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• 2011

The curvature dependence of the physisorptions of $H_2$ on graphene surface and their barrier to the chemisorptions has been studied. The graphene with steeper curvature can adsorb $H_2$ stronger due to the more $sp^3$ character of the carbon. However, for the negative curvature, the binding strength of the physisorption and the barrier to the chemisorptions are determined by steric repulsion as well as the $sp^3$ character.

• The Korean Fashion and Textile Research Journal
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• v.12 no.5
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• pp.657-666
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• 2010

As the beauty industry has strong intangible attributes unlike the other service industry, the provision of service quality capable of fulfilling customer's desire and customer's satisfaction activity due to this are important. The purpose of this research is to provide marketing materials capable of maximizing consumer's satisfaction as a study on assessment of service quality according to a character type of customers by beauty shop type with the target of customers using a beauty shop. The sub-dimension of a personality type of beauty shop's customers is five factors, which were named neurose, sincerity, extroversion, openness and affinity, and the sub-dimension of service quality is five factors, which were named specialty, responsiveness, empathy, tangibility and reliability. It could be known that the service quality according to the character type of customers by beauty shop has influence on all of tangibility, reliability, expertise, responsiveness and empathy factors. Accordingly, this research would be utilized as good material for service improvement that can divide service quality by beauty shop and maximize satisfaction of consumers. Based on the above research results, marketing implications are that the customized promotional management according to the character type of customers by beauty shop is necessary and the granular management manual according to customer's differentiation by beauty shop is necessary. The effect that a personality type of customers by beauty shop has on the empathy factor among service quality factors shows a significant difference in neurose and openness factors in case of beauty salons, and shows a significant difference in sincerity and openness factors in case of skin care salons.

• Journal of Oriental Neuropsychiatry
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• v.30 no.1
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• pp.23-30
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• 2019

Objectives: The purpose of this study is to investigate the emotional characteristics of the Sasang constitution with the Core Seven Emotions Inventory (CSEI) and Temperament and Character Inventory (TCI). Methods: A total of 224 participants were assessed with a Sasang Constitutional Analysis Tool (SCAT) for Sasang Constitution Diagnosis, and completed the Core Seven Emotions Inventory (CSEI) and Temperament and Character Inventory (TCI). Results: 1. From the results of the CSEI, Soeumin showed a significantly higher fear (恐) score than the Soyangin. 2. From the results of the TCI, Soeumin showed a significantly higher harm avoidance (HA) score than Taeeumin and Soyangin. Moreover, the Soyangin showed a significantly higher reward dependence (RD) score than Taeeumin and Soeumin. 3. In the correlation tests of the CSEI sub-scales, there was negative correlation between joy (喜) and other emotions, which are thoughts (思), depression (憂), sorrow (悲) and fear (恐). There were positive correlations between the emotions except joy (喜). 4. In the correlation tests of the TCI sub-scales, there was negative correlation between HA and persistence (P), and HA and SD. Moreover, there was a positive correlation between RD and cooperativeness (C) and between P and self-directedness (SD). 5. In the correlation tests of the TCI and CSEI, joy (喜) showed a negative correlation with HA and a positive correlation with P and with SD. Anger (怒) showed a negative correlation with C and other emotions except joy (喜) showed a negative correlation with RD. Conclusions: The differences of psychological characteristics in Sasang Constitution were shown with CSEI and TCI from this study.

• Journal of Science Education
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• v.37 no.1
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• pp.131-141
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• 2013

The purpose of this study was to find out the effect of the science lesson emphasized creativity and character on the creativity and science related attitudes of elementary school students. To conduct this study, 'Unit 1. Weighing', which is a part of content of 4th grade science text book, was analyzed and 11 science lessons emphasized the elements of creativity and character were developed. One experimental group and one control group of 4th grade students were selected to perform a prior investigation. Then the experimental group attended developed science lessons and the control group attended the traditional science lessons based on the text book and teacher's guide. After conducting lessons, a post investigation was performed for each group and the results were analyzed to produce the following conclusions. First, the science lesson emphasized the creativity and character was more effective than traditional one to improve students' creativity. Especially, fluency, originality and abstractness in sub-elements of creativity, were improved meaningfully. Second, the science lesson emphasized the creativity and character was more effective than traditional one to enhance students' science related attitudes. Especially, in sub-domain, the attitude about scientific research and the application of scientific attitude were enhanced meaningfully. Consequently, science lesson emphasized the creativity and character was thought to have a positive effect on improving the creativity and science related attitudes of elementary students.

• Journal of Korea Entertainment Industry Association
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• v.13 no.1
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• pp.185-197
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• 2019

This study intended to analyze the early childhood education freshmen's academic interest. For this study relationship among academic self-efficacy, character strength and learning motivation. The study subjects were 144 early childhood education freshmen at K-college in Deagu. They answered the survey regarding academic self-efficacy scale, VIA-IS(Values in action inventory of strength) short form scale, school learning motivation scale. The collected data were analyzed by frequency analysis, descriptive statistics, pearson correlation and multiple regression analysis using SPSS 18.0 program. The study finding are as follows. First, the average of academic self-efficacy, character strength and learning motivation of students were near at the intermediate-level. Second, academic self-efficacy, character strength and learning motivation were significantly positive correlated. Third, when examining the relative effect of early childhood education freshmen's academic self-efficacy and character strength on learning motivation, self regulatory efficacy among the sub-factors for academic self-efficacy and courage among the sub-factors for character strengths.