• Journal of Korea Entertainment Industry Association
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• v.13 no.8
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• pp.661-670
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• 2019

The purpose of this study was to analyze influential factors for blood transfusion for patients undergoing total knee arthroplasty and total hip arthroplasty, which are chronic degenerative arthritis, using the 2017 sample data of Health Insurance Review & Assessment Service, to research the impact of blood transfusion on the usage of medical services among arthroplasty patients, and ultimately to provide some information on how to offer quality medical services. The findings of the study were as follows: First, whether there were any significant differences in the use or nonuse of transfusion during total knee arthroplasty according to hospital characteristics and patient characteristics was compared. As for significant variables, the type of health care institution, the level of sickbed, gender and anemia were found to have been statistically significantly related. Second. whether there were any significant differences in the use or nonuse of transfusion during total hip arthroplasty according to hospital characteristics and patient characteristics was compared. As for significant variables, the type of health care institution and the level of sickbed were found to have been statistically significantly related. Third, whether there were any significant differences in the presence or absence of diabetes among the total knee arthroplasty patients according to hospital characteristics and patient characteristics was compared. As for significant variables, the type of health care institution, the number of sickbed and anemia were found to have been statistically significantly related. In the case of the total hip arthroplasty patients, there were no variables that were significantly related.

• The korean journal of orthodontics
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• v.37 no.3 s.122
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• pp.220-230
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• 2007

Objective: The purpose of this study was to determine the changes of mandibular anterior alveolar bone thickness with age. Methods: Cephalometric radiographs of 160 skeletal class I patients (male 80, female 80) with normal vertical growth pattern was investigated by measuring the buccolingual thickness of mandibular alveolar bone on the basis of root axis. Results: As the age increases, both male and female showed a significant decrease in buccolingual width of the mandibular anterior alveolar bone and in the width of mandibular anterior lingual alveolar bone except the CEJ area of females. However, there was no significant difference in the thickness of mandibular anterior buccal alveolar bone and in the width of maximum prominence of mandibular symphysis with age. Conclusion: From the above results, it is concluded that Korean children whose growth pattern is sagittally skeletal class l with a vertical normal growth pattern have a greater mandibular anterior lingual alveolar bone width than Korean adults; therefore, lingual movement of mandibular incisors, which is usually accompanied in extraction treatment, is considered to be more preferable in younger patients.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.16 no.4 s.95
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• pp.389-396
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• 2005

In this paper, we propose a pre-distortion method using the NLMS(Normalized Least Mean Square) algorithm to cope with hish PAPR(Peak to Average Power Ratio) problem in OFDM communication system. This proposed scheme estimates the distortion characteristics of HPA, and changes the characteristic against the distortion. Therefore, it can be shown that the adaptive characteristic of the NLMS pre-distorter is good to track the various nonlinear characteristic of HPA, even though HPA characteristic is changed by temperature variation or aging. From the performance analysis, SNR efficiency of NLMS pre-distorter is about $0.5\;\cal{dB}$ less than that of common numerical non-adaptive pre-distorter, when IBO(Input Back Off) is $0\;\cal{dB}$. However, the NLMS pre-distorter is better than the common numerical pre-distorter, because these two pre-distorters have similar performance in higher than $3\;\cal{dB}$ IBO, and the NLMS pre-distorter maintains the constant performance even though characteristic of HPA is changed.

• Journal of Dental Rehabilitation and Applied Science
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• v.40 no.2
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• pp.91-99
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• 2024

In the case of skeletal class III edentulous patients, the stability of dentures can be achieved by using a crossbite by considering the residual ridge relationship when fabricating complete dentures. Forming the anterior teeth in a normal occlusal relationship in a skeletal class III ridge relationship may reduce the stability of the denture by increasing the anterior cantilever. However, when patients use complete dentures, not only functional aspects but also aesthetic aspects are important. The aesthetics of complete dentures depends on how the anterior artificial teeth are arranged, and cases of complete denture fabrication using normal occlusion or edge-to-edge bite in edentulous patients with skeletal class III ridge relationships have been reported. In this case, complete dentures were fabricated for an edentulous patient with a skeletal class III edentulous patients by forming anterior edge-to-edge bite considering neutral zone in maxillary anterior teeth, and good aesthetic and functional results were obtained.

• The Journal of Korean Academy of Prosthodontics
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• v.55 no.1
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• pp.79-87
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• 2017

The open bite malocclusion is a common clinical entity and has multifactorial causes. Development of effective treatment plan and management is dependent on proper diagnosis. The skeletal open bite patient requires a coordinated orthodontic and orthognathic surgical approach to achieve stable occlusion, acceptable esthetics, and improved function. But in case of open bite with severely decayed dentition, restoration in the entire dentition is necessary. Using the facial analysis and diagnostic wax-up, the most effective treatment was prosthetic rehabilitation. The provisional restorations were fabricated to satisfy esthetic and functional requirements, which result in the uniformly distributed occlusal force, anterior and canine guidance. The inter-arch relationship, labio-dental harmony, and the soft tissue aspect, which is important to estimate the longevity were evaluated. Definitive restorations of monolithic zirconia were made by replicating provisional restorations by using the latest CAD/CAM technology. They were delivered to the patient and clinical follow-up observation was satisfactory.

• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.4
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• pp.479-484
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• 2000

The conventional treatment of skeletal class III malocclusion has been focused on the application of orthopedic forrce primarily to the mandible. Thus moderate Class III malocclusions can be corrected by the anterior displacement of the maxilla and maxillary dentition, possibly by restricting the growth of the mandible or by changing its direction. The patients having skeletal Class III malocclusion were treated with removable appliance & fixed appliance for detailed tooth movement and the following results were observed: 1. The anterior crossbite was corrected. 2. The forward and downward growth of the maxillary complex was obtained. 3. The lingual tipping of the mandiblar incisors was performed and the mandible was rotated in the clockwise direction.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.1
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• pp.78-83
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• 2009

In case of endodontic treatment and extensive restoration of severe dental caries, trauma, and developmental defect, esthetic restoration of primary incisors and permanent anterior teeth for children and adolescents period is delicate matter for pediatric dentists. Existing restorative methods for anterior teeth have retentive and esthetic limitations for badly damaged teeth, especially for the adolescent anterior teeth. Therefore, the preparative stage for setting the permanent prosthesis as well as the retention and esthetics have to be considered. In this case, esthetic restoration for badly destroyed anterior teeth was tried with fiber-reinforced post and the result was satisfactory.

• Journal of the Institute of Convergence Signal Processing
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• v.14 no.1
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• pp.51-56
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• 2013

PID control systems are significantly utilized in industrial fields because of its multiple advantages. Many researches about more effective PID controllers to enhance control system performances have been addressed so far. This paper proposes a novel PI-PD control system with a pre-compensator which is configured with a pre-compensator and PD controller in PIcontrol system. The normal method is applied to the proposed control system for obtaining a simple first-order controller from cancelation of poles and zeros. We design a pre-compensator and PD controller by using parameters of PI controller and the transfer function of a plant. Computer simulation is carried out to demonstrate effectiveness of the proposed control system.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• v.6
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• pp.79-98
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• 2002

지금까지 우리는 한국어와 독일어를 비교하면서 동사의 정형과 부정형을 관찰해 왔다. 이 부정성(역으로 말하면 비구속성)은 한국어 동사에는 전반적으로 통용되는 데 반해 독일어에는 부정형/동사원형과 분사가 그러할 뿐이다. 동사의 특성 연구는 어느 자연어/개별언어의 상이한 기능을 위해서 뿐만이 아니라 외국어 학습/습득을 위해서도 큰 의미를 갖는다. 이러한 중요성에도 불구하고 독특한 한국어 동사의 부정성, 그 연구는 거의 찾아볼 수가 없다. 한국어와 독일어 동사의 부정성 비교에서 드러난 문제점은 대체로 다음과 같이 요약될 수 있을 것이다. $\ast$ 한국어 동사의 특징인 부정성은 우리의 운명으로 간주해야 할 것이다. 왜냐하면 우리가 어떤 면에서는 유익함을, 그리고 어떤 다른 면에서는 문제점을 감수해야 하기 때문이다. 특히 전형적인 전치성 언어인 유럽언어를 습득할 때 언어간섭현상을 통해 그러하다. $\ast$ 독일어의 부정사/분사 및 한국어 동사가 인칭변화를 하지 않는다는 것은 그들이 주어를 갖지 않고 있거나 (독일어의 경우), 아니면 그것이 어떤 문법/통사적 역할을 하는가 (한국어의 경우)에 주된 원인이 있다. $\ast$ 비교 대상의 양쪽은 생략가능성, 즉 원자가 요구에 대한 자유/비구속성을 누린다. 핵(성분), 즉 독일어의 부정형 및 분사 그리고 한국어 동사는 혼자 남을 때까지 생략이 계속될 수 있다. 이러한 의미에서 부정성은 <비한정성/비구속성>과 관련된 것 같으며, 반면에 정동사의 특성은 <한정성/구속성>과 관계되어 있다. $\ast$ 원자가 요구/충족에 대한 자유/비구속성은 한국어 동사/술어가 문장 끝에 고정되어 있다는 사실은, 직접 또는 간접으로 본동사 앞에 놓여 있어야 되는 모든 문장성분과 부문장 때문에, 즉 한국어의 전면적인 전위수식 현상으로 흔히 큰 부담/복잡함을 야기한다는 데에 그 원인이 있다. 이러한 상황에서 동사는 가능한 한 그의 문장성분을 줄이려 한다. 통사적으로 보장되어 이미 있으니 말이다. 그래서 한국어 동사의 부정성은 일종의 부담해소 대책으로 간주될 수 있을 것이다. $\ast$ 두 비교 대상에서의 핵 및 최소문장 가능성은 역시 원자가에 대한 비구속성에서 비롯된다. $\ast$ 우리 한국인이 빨리 말할 때 흔히 범하는 부정성으로 인한 인칭변화에서의 오류는 무엇보다도 정형성/제한성을 지닌 독일어 정동사가 인칭 변화하는 데 반해 한국어에서는 부정성/비구속성을 지닌 동사가 그것과는 무관한 페 기인한다. 동사의 속성을 철저히 분석함으로써 이런 과오를 극복해야 할 것이다. 한국어 동사의 부정성은 지금까지 거의 연구되지 않았다. 이 문제는 또한 지속적으로 수많은 다른 자연어들과의 비교분석을 통해 관찰돼야 할 것이다. 이 논문이 이런 연구와 언어습득을 위한 작업에 도움이 되기를 바란다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.5
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• pp.475-483
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• 2002

The new architecture for the stabilization of an adaptive linearizer using the RLS algorithm is presented. The delay lock loop is apl)lied to compensate the feedback loop delay of the nonlinear amplifier output, and the Yang's algorithm is used to mitigate the numerical unstability of the RLS algorithm. This method is applied to the linearizer using the polynomial predistorter, and it's efficacy is verified by the simulation of the proposed structure.