• Journal of the Korean Society of Manufacturing Process Engineers
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• v.18 no.11
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• pp.89-95
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• 2019

In this research, the effect of roughing on tool load through bottom-up machining is investigated through actual machining. Generally, through the use of high-speed machining technology, machining methods, such as general roughing, operate by deepening the cutting depth for as long as the tool is able to withstand it, giving a slower feed rate, less cutting depth, and faster feed. However, when the cutting depth is deep, there is a problem in that the stepped shape of the cutting area is increased (e.g., by the shaking of the tool or the chipping load). However, if the cutting is performed less, the cutting time becomes relatively long. To compensate for these drawbacks and extend the service life of the tool, economic efficiency needs to be secured.

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2005.09a
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• pp.35-39
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• 2005

Phosphor powders of zinc gal late added with Mg and rare-earth elements were prepared by sol id state reaction to improve luminescent properties. Green emitting $ZnMnGa_{2}O_{4}$ reached maximum intensity at Mn=0,005 mole$\%$ and further improvement was achieved by addition of $Mg^{2+}$. Tm, Mg-added zinc gallate phosphor exhibited a strong blue band emission, peaking at about 420 nm with the maximum intensity at the concentration of 0.003 mole$\%$ Mg and 0.015 mole$\%$ Tm. Deepening of the potential wells of the ground and excited states was suggested to be the cause for the enhancement in emission intensity at optimal doping of Mg and Tm.

• Journal of Contemporary Eastern Asia
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• v.20 no.2
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• pp.237-258
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• 2021

The COVID-19 pandemic has highlighted the risks of an over-concentration of supply chains in one country. It has motivated stakeholders to pursue diversification strategies. However, a paradox exists. Stakeholders have shied away from a complete decoupling and preferring to selectively enhance economic ties with China. This article explores this paradox by examining supply chain concentration in China as a form of asymmetric interdependence and the countermeasures from the U.S., Japan, Australia, and India to minimize vulnerabilities. It argues that while the COVID-19 disruptions have brought to light the risk of supply chain overconcentration in China, countermeasures are also driven by coercive diplomacy and the deepening U.S.-China rivalry. The paper also examines the feasibility of diversification efforts by focusing on the capacity and capabilities of alternative supply chain hubs. It finds that while states are actively seeking ways to prevent China from using asymmetric interdependence of supply chains and trade to gain political leverage, there are structural limits to the degree of diversification in the short to mid-term.

• Journal of Korean Foot and Ankle Society
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• v.24 no.4
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• pp.168-172
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• 2020

Chronic recurrent peroneal dislocation often responds poorly to conservative treatment. Surgical treatment has been reported to be more effective than conservative treatment, and various surgical treatment methods are available: superior peroneal retinaculum repair or reattachment, peroneal groove deepening procedures, rerouting procedures, or bone block procedures. Although various treatment options have been reported, there is no consensus regarding which treatment is better. This paper proposes a distal fibular rotational plasty that can prevent recurrent peroneal dislocations and recover its function well by securing a stable peroneal tendon excursion space.

• International Journal of Contents
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• v.17 no.4
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• pp.79-90
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• 2021

With the deepening of population aging, pension has become an urgent problem in most countries. Community smart pension can effectively resolve the problem of traditional pension, as well as meet the personalized and multi-level needs of the elderly. To predict the pension intention of the elderly in the community more accurately, this paper uses the decision tree classification method to classify the pension data. After missing value processing, normalization, discretization and data specification, the discretized sample data set is obtained. Then, by comparing the information gain and information gain rate of sample data features, the feature ranking is determined, and the C4.5 decision tree model is established. The model performs well in accuracy, precision, recall, AUC and other indicators under the condition of 10-fold cross-validation, and the precision was 89.5%, which can provide the certain basis for government decision-making.

• Journal of Engineering Education Research
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• v.22 no.1
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• pp.22-28
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• 2019

The purpose of this study is to develop instructional design model of flipped learning suitable for engineering education field and to draw out effects and improvements by applying it to actual lessons for engineering college students. Literature review and case studies were conducted to achieve the purpose of the study. For a case study, flipped learning was applied to 'creative problem solving methodology' which is a liberal arts course of engineering college at D university in Gyeonggi-do. As a result of the literature review, the PARTNER model was applied and weekly instructional guide was presented by each stage. In addition, the results of analysis on the reflection journal showed that the students were more able to achieve the deepening learning stage through active participation in class than the existing class, and found that they had a more challenging plan after the class.

• Journal of Oral Medicine and Pain
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• v.47 no.2
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• pp.78-86
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• 2022

An association between psychological factors and temporomandibular disorders (TMD) has been extensively explored for over 40 years, and a high prevalence of depression and somatization has been consistently reported in patients with TMD. Current evidence suggests that patients' somatic awareness can serve as a primer for TMD incidence and further contribute to the transition to chronic pain. However, the current understanding of somatization from a medical perspective is limited. The best way to address patients with TMD pain who have somatization is also unclear. Therefore, this paper aims to provide an overview of somatization in the context of pain psychology and address its clinical implications in the context of TMD pain.

• East Asian Journal of Business Economics (EAJBE)
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• v.10 no.2
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• pp.127-137
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• 2022

Purpose - The purpose of this research is to test the impact of transformational leadership on subordinates' performance (job performance and creativity) in Chinese companies. In addition, it intends to verify the mediating effect of subordinates' organizational identification on the relationship between transformational leadership and employee performance. Research design, data, and methodology - To this end, a survey was conducted on the members of Chinese companies. Out of 400 returned responses to the final questionnaire, 349 were used for analysis after excluding invalid responses. Data were analyzed using SPSS 24 and AMOS 24. Result - The analysis results are as follows. First, transformational leadership has a direct effect on subordinates' job performance and creativity. Second, transformational leadership was found to increase subordinates' organizational identification. Third, the mediating effect of organizational identification was verified in the relationship between transformational leadership and performance (job performance and creativity). Conclusion -This study analyzed the effect of the transformational leadership on subordinate's job performance and creativity amid the deepening of China's market economy policies after economic opening. The study expands the related studies.

• Textile Coloration and Finishing
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• v.34 no.3
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• pp.165-172
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• 2022

Polypropylene(PP) is a textile material with various functions such as eco-friendliness, lightness, and elasticity. Although most synthetic fibers can be dyed and finished, but original PP is difficult to dye or finish due to its extremely hydrophobic properties, so its application expansion is limited. In order to solve this problem, dyeable PP was developed, and various researches on textiles for clothing such as mass production technology, fine fiberization and performance improvement are in progress. Plasma treatment is a processing method for modifying the surface of fabrics, and has effects such as hydrophilization, deepening color, improving adhesion, and surface polymerization. In this study, plasma treatment was applied to study changes in hydrophilization properties of dyeable PP, surface changes before and after plasma treatment and performance according to hydrophilization.

• American Studies
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• v.44 no.1
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• pp.113-135
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• 2021

The Civil War is widely accepted as the single most meaningful event in American history that overcame the most fatal crisis of internal division of the nation with much success. That meaningfulness in turn glorifies the North's triumph over the South and justifies hierarchical differences between the two. Yet, as shown in the studies of Civil War literature, such glorification and justification relies too much on the North-centered historical paradigm. This essay aims to offer a way of rectifying it by examining a short story by one of the persistently obscured writers of the period: Elizabeth Stoddard. The essay follows the cue of Alice Fahs's cultural-studies methodology of using popular wartime periodicals as the main resource of the war literature, and reads Stoddard's "Sally's Choice" as one of the examples that expose the hegemonic bias inside the North-directed discourse of the time. This essay is expected to demonstrate the necessity of expanding and deepening our conception of 'literature,' 'the Civil War,' and 'Civil War literature' in an ever-flexible and ever-changeable manner.