• Kyungpook Mathematical Journal
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• v.51 no.3
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• pp.301-309
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• 2011

In this paper we dene the notions of left *-bimultiplier, *-bimultiplier and generalized *-biderivation, and to prove that if a semiprime *-ring admits a left *-bimultiplier M, then M maps R ${\times}$ R into Z(R). In Section 3, we discuss the applications of theory of *-bimultipliers. Further, it was shown that if a semiprime *-ring R admits a symmetric generalized *-biderivation G : R ${\times}$ R ${\rightarrow}$ R with an associated nonzero symmetric *-biderivation R ${\times}$ R ${\rightarrow}$ R, then G maps R ${\times}$ R into Z(R). As an application, we establish corresponding results in the setting of $C^*$-algebra.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.10a
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• pp.555-558
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• 2000

It has been increasingly proving in interest of environment pollution around the world. so, recycling of waste resources are seriously taken into consideration. Great deal of coolant for the car have been wasted for along time. due to the end of life time of them. Therefore, validities of wasted coolant as an agent for concrete are described in this paper. Mechanical properties of concrete using coolant wastes is investigated. As contents of coolant wastes increase, slump and slump flow decrease, while air content show reverse tendency. setting time shows to be accelerated with increase of waste contents. As for the effect of low curing temperature, low curing temperature increase compressive strength with increase of coolant waste. Application of coolant waste to cold weather concrete is considered to achieve favorable effects.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.9
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• pp.197-204
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• 2003

This study proposes a method to reduce errors in scanning object and registration using a laser scanner. The method consists of 3 stages. First, there is an error induced by the difference of the distance between the probe and the object. It is possible to reduce the error by planning a scanning strategy: object setting, scan path. Second, the scan data of the tooling ball affects calculating the tooling ball center. A z-direction compensation is given to calculate more accurate registration points. Third, three points are used to determine a coordinate transformation on each frame. The maximum error usually lies on the third tooling ball in the conventional merging method. LSM (Least Square Method) is applied to a coordinate transformation to reduce the registration error.

• Archives of Craniofacial Surgery
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• v.18 no.4
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• pp.264-268
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• 2017

The zygomaticomaxillary complex (ZMC) functions as a buttress for the face and is the cornerstone to a person's aesthetic appearance, by both setting the midfacial width and providing prominence to the cheek. Malar deficiency is often acquired by blunt injury incurred in a traumatic accident, resulting in ZMC fracture. A 48-year-old male patient presented a right ZMC fracture after contusion injury by a baseball. He only received conservative management and later he suffered discomfort during mouth opening at the moment of mastication, due to trismus involving the temporomandibular joint. In the current case, we describe a surgical technique, by which the malar body is shifted anteriorly and laterally after combined oblique-vertical osteotomy. The technique presented, eventually restored the former aesthetic position of the malar complex and symmetry, and, moreover, improved mastication function.

• Journal of Korean Dental Science
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• v.5 no.1
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• pp.21-28
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• 2012

Purpose: In this study the bone healing ability of autogenous tooth bone graft material as a substitute material was evaluated in a mini-pig cranial defect model through histologic examinations and osteonectin reverse transcription polymerase chain reaction (RT-PCR) quantitative analysis. Materials and Methods: A defect was generated in the cranium of mini-pigs and those without a defect were used as controls. In the experimental group, teeth extracted from the mini-pig were manufactured into autogenous tooth bone graft material and grafted to the defect. The mini-pigs were sacrificed at 4, 8, and 12 weeks to histologically evaluate bone healing ability and observe the osteonectin gene expression pattern with RT-PCR. Result: At 4 weeks, the inside of the bur hole showed fibrosis and there was no sign of bone formation in the control group. On the other hand, bone formation surrounding the tooth powder granule was observed at 4 weeks in the experimental group where the bur hole was filled with tooth powder. Osteonectin gene expression; there was nearly no osteonectin expression in the control group while active osteonectin expression was observed from 4 to 12 weeks in the experimental group. Conclusion: We believe this material will show better results when applied in a clinical setting.

• Journal of Korea Entertainment Industry Association
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• v.13 no.4
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• pp.83-91
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• 2019

Gameplay exists not only in game activities, but also in other art forms. An animated film with strong gameplay whose gameplay narrative follows the presupposition principle, achieved through unimaginable sound effects, exaggerated visual styling, hypothetical time and space concepts, fictional storylines and character performances. The strength or the presence or absence of gameplay in animated films is reflected in the grasp and use of these gameplay elements in the process of animated film narratives. The gameplay narrative of animated films fully utilizes the characteristics of gameplay thinking. In the process of scriptwriting and narrative, it combines entertainment, action, adventure, competition and other elements to fully reflect the characteristics of "gameplay". Gameplay narratives often use the strategies of reverse setting, repetition and interaction, and rules and challenges setting, which not only enhances the fun of animated film narratives, but also attracts the attention of the audience, which then can enhance the audience's viewing experience.

• Journal of the Korean Society of Costume
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• v.62 no.5
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• pp.73-87
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• 2012

The purpose of this study is to find the Dart Manipulation with good fitting and evaluate the aesthetics of Dart Manipulation that is used in the designs of the original tops for women in their 30's. Subsequently, it suggests dart manipulation with good body fitting and physical fitness when designing original tops. The findings of this study are as follows. First, in the fitting of Dart Manipulation for different body types, cross direction Dart Manipulation received good marks in the Square Body Type while mixed direction and diagonal direction Dart Manipulation received high evaluation in the Standard Body Type. Also, for the Reverse Triangle Body Type, mixed direction Dart Manipulation received high marks. Since there are only small changes in fitting for the Square Body Type, the position of Dart Manipulation should be determined in regards to the aesthetic view as well as the fitting of the Standard Body Type and Reverse Triangle Body Type. Second, in the fitness of Dart Manipulation for different body types, an approach from the aesthetic view should be considered for Square Body Types because of the differences in fitness according to the position of dart manipulation. The fitness should be considered when positioning Dart Manipulation for the Standard Body Type and Reverse Triangle Body Type because of these differences. Third, for the greater variance of drop for these different body types, the change of the amount of dart received lower evaluation in fitting since the amount of dart increased when the dart was located higher than B.P. The number of dart should likely increase when gathering or tucking is necessary when there is an excessive amount of dart in Dart Manipulation for the different body types. Fourth, as for the changes of wrinkles in accordance with the body type, wrinkles were likely to be formed at the breast or neck area when there was a larger difference in drop. To prevent such problems, one more dart should be made on the wrinkle. In conclusion, the study suggests designing the original top with a better look and comfort by setting the balance between aesthetics and fitting in the design stage.

• Journal of The Korean Digital Architecture Interior Association
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• v.4 no.2
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• pp.26-34
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• 2004

Our country did not illustrate and reverse by a city planning law department construction Buddhist priest's robe dual setup the urban setting to be regulated, it came. The city planning law as the high position system of space planning mainly provides the use and a size of the land, the construction law the detail contents of site undergarment concrete location and the form back is provided and of course, regarding the structure which relates with the designation of concrete building use in him and the immediacy back. These two laws are come by a trade name complement and a function sharing role in order for the affirmative development of the city to become accomplished, being used. To necessity of District unit plan the general causal government employee all it is sympathizing, it relates it goes to extremes and with the maintenance of endurance environment and many portion with charge Sikkim also the fact that it is the criticism which relativy is negative in duty of administrative origination is fact in the people. But realization of plan hazard the execution of the public section which stands will be important, it will reach and the public section execution plan of the autonomous nine dimension for must be prepared. The next research that the individual globe plan and development actual condition actual proof and the research which it analyzes system is necessary with base, sees the general operation evaluation of Seoul District unit plan.

• Journal of environmental and Sanitary engineering
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• v.13 no.1
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• pp.57-68
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• 1998

This study was surveyed to examine the removable ability of residual aluminum with the coagulants(LAS, PAC) and the auxiliary coagulants(Loess, R-calmont) on raw water. The leaching test of the auxiliary coagulant showed that the loess contained a lot of Al, Fe and Mn. On the reverse, the R-calmont was a little. Most of the loess were composed of $SiO_{2}$ 53.25%, $Al_{2}O_{3}$ 29.28%, $Fe_{2}O_{3}$ 10.73% and Si/Al ratio was 3.08. In using both LAS vs. loess and PAC vs. loess as the coagulated material, the removal of residual aluminum was the highest as 96.3%, 96.6% respectively, and that of the residual turbidity was 95.0% when PAC vs. R-calmont was dosed 0.2mg/L. Also, loess showed better than R-calmont in the removable efficiency of aluminum and turbidity. When the setting time of auxiliary coagulant was input ar the same time with coagulant, the removal aluminum was the highest as 93.3% to 96.6%.

• International journal of thyroidology
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• v.11 no.2
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• pp.160-166
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• 2018

Background and objectives: Salivary hypofunction is one of the common side effects after radioiodine therapy, and its pathophysiology is salivary ductal stenosis resulting from ductal cell injury. This study aimed to develop the functional culture environment of human parotid gland ductal cells in in vitro three-dimensional perfusion culture system. Materials and Methods: We compared plastic dish culture method and three-dimensional culture system containing Matrigel and nanofiber. Morphogenesis of reconstituted salivary structures was assessed by histomorphometry. Functional characteristics were assessed by immunohistochemistry and reverse transcription polymerase chain reaction (aquaporin 5, CK7, CK18, connexin 43, and p21). In addition, we designed the media perfusion culture system and identified higher rate of cell proliferation and expression of connexin 43 in perfusion system comparing to dish. Results: Human parotid ductal cells were well proliferated with the ductal cell characters under environment with Matrigel. In the presence of Matrigel, aquaporin 5, CK18 and connexin 43 were more expressed than 2D dish and 3D nanofiber setting. In the media perfusion culture system, ductal cells in 3D culture media showed higher cells count and connexin 43 expression compared to 2D dish. Conclusion: This in vitro ductal cell perfusion culture system using Matrigel could be used to study for radioiodine induced sialadenitis model in vivo.