• Imaging Science in Dentistry
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• v.35 no.2
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• pp.63-68
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• 2005

Recently implant has become an important field in dental clinic. Radiographic examination of pre- and post- operation is essential for successful treatment. Clinicians should have knowledge about the purpose of the radiographic examination, suitable imaging modality for the cases, anatomic landmarks of tooth and jaw bone, advantage and limitation of panoramic radiographic examination for implant, principle and interpretation of cross-sectional imaging, bone mineral density, post-operative radiographic examination. This paper will be helpful to get above informations for dentists who want to do dental implant successfully.

• Journal of Chest Surgery
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• v.15 no.3
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• pp.346-354
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• 1982

A Complete transposition of the great arteries combined with V.S.D, A.S.D, dextrocardia, and P.S is a rare congenital anomaly. The patient was a 10 year-old female whose complaints were frequent URI, exertional dyspnea, and cyanosis at rest since birth. Cheat X-ray films showed Dextrocardia ; situs inversus, moderate cardiomegaly, and Characteristic egg-shape heart shadow. E.K.G, Echocardiography, Cardiac Catheterization, and Angio-Cardiography were performed. Open heart Surgery was done under diagnosis of d-TGA, Dextrocardia, V.S.D, A.S.D, and P.S. At the time of Operation, Dextroeardia, T.G.A, Secndum type A.S.D, A.S.D, and P.S. At the time of Operation, Dextroeardia, T.G.A, Secndum type A.S.D. ($2.0{\times}2.0cm$. in diameter), V.S.D. type II ($1.5cm{\times}1.5cm$ in diameter), and pulmonary valvular stenosis were noted. Mustard operation using pericardial Baffle in the atrium for T.G.A. was perforsned. Teflon patch graft for closure of V.S.D. through tricuspid orifice and pulmonary Valvulotomy through pulmonary arteriotomy were performed. The post-op, low cardiac output Syndrome and dysrhythmicawere developed till Postoperative day #7, so that was controlled by inotropic and antiarrhythmic agents. After that, patient's conditions were Uneventful.

• Journal of Institute of Control, Robotics and Systems
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• v.12 no.12
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• pp.1163-1168
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• 2006

Manufacturing technology for the production of high value-added fine chemical products is emphasized and getting more attention as the diversified interests of customers and the demand of high quality products are getting bigger and bigger everyday. Thus, the development of advanced batch processes, which is the preferred and most appropriate way of producing these types of products, and the related technologies are becoming more important. Therefore, high-precision batch distillation is one of the important elements in the successful manufacturing of fine chemicals, and the importance of the process operation strategy with quality assurance cannot be overemphasized. Accordingly, proposing a process structure explanation and operation strategy of such processes including batch processes and batch distillation would be of great value. We investigate optimal operation strategy and production planning of multi-purpose plants consisting of batch processes and batch distillation for the manufacturing of fine chemical products. For the short-term scheduling of a sequential multi-purpose batch plant consisting of batch distillation under MPC and UIS policy, we proposed a MILP model based on a priori time slot allocation. Also, we consider that the waste product of being produced on batch distillation is recycled to the batch distillation unit for the saving of raw materials. The developed methodology will be especially useful for the design and optimal operations of multi-purpose and multiproduct plants that is suitable for fine chemical production.

• Journal of Chest Surgery
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• v.56 no.6
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• pp.445-448
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• 2023

A 25-year-old man returned to Seoul National University Children's Hospital with mild dyspnea on exertion. He had undergone an arterial switch operation at 1 month after birth to correct a complete transposition of the great arteries and a ventricular septal defect. When the patient was 15 years old, dilatation of the neo-aortic sinus and annulus was first identified; since then, it had gradually increased. Given the young age of the patient and the degree of aortic regurgitation (AR), which was mild to moderate, we opted to perform a valve-sparing neo-aortic root replacement with aortic valve repair. Postoperative echocardiography showed successful reductions in the sizes of the aortic sinus and annulus, with only mild AR remaining.

• Journal of the Korean Society of Earth Science Education
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• v.16 no.2
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• pp.276-290
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• 2023

The purpose of this study is to analyze the characteristics and specific elements of successful science classes that pre-service elementary school teachers think. For the study, 61 pre-service elementary school teachers (47 females, 14 males) were recruited as research participants. The data used in the study are mutual evaluation papers prepared during class performances by group and individual. The amount of data was a vast amount of qualitative data with a total of 150 pages, and the research results were derived by inductively categorizing this data through qualitative analysis. The summary of the research results is as follows. First, the factors constituting a successful science class were analyzed into 7 categories (14 sub-categories, 33 sub-elements). The elements that make up a successful science class in detail were analyzed as science subject contents, class management, selection of teaching and learning methods and organization of class contents, teaching and learning materials, understanding of students, understanding of teaching situations, and class-related efforts. Second, it was possible to describe the practical classes of pre-service teachers by collecting the details of the elements that make up a successful science class recognized by pre-service teachers. As seen in the above research results, the characteristics and specific elements of successful science classes recognized by pre-service teachers were identified, and based on this, pre-service teachers will be able to develop support for effective science class operation, and continuous analysis should be conducted.

• Journal of Korean Society for Quality Management
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• v.29 no.3
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• pp.39-48
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• 2001

Preventive maintenance(PM) is an action taken on a repairable system while it is still operating, which needs to be carried out in order to keep the system at the desired level of successful operation. In this paper, we consider a Bayesian approach to determine an optimal periodic preventive maintenance policy. When the failure time is Weibull distribution with uncertain parameters, a Bayesian approach is established. Some numerical examples are presented for illustrative purpose.

• Journal of Chest Surgery
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• v.24 no.6
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• pp.610-615
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• 1991

Cancer of the hypopharynx and cervical esophagus has been a major therapeutic challenge to many surgeons. Here, we report 3 cases of successful esophageal reconstruction by gastric pull-up and pharyngogastrostomy after pharyngolaryngoesophagectomy for hypopharyngeal malignancy. Postoperative recoveries were uneventful. Oral feeding was encouraged a week or two after the operation and all the patients were discharged without feeding problem.

• Journal of Chest Surgery
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• v.22 no.4
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• pp.693-697
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• 1989

A forty-eight-year-old female patient with ascending aortic aneurysm with aortic insufficiency underwent a modified Bentall operation. The ascending aorta and the aortic valve were replaced with a composite graft containing a St. Jude valve. The coronary orifices were anastomosed to the tubular Dacron prosthesis by means of a second smaller Gore-Tex tube, and a fistula between the aneurysmal sac and the right atrial appendage was created to drain oozing from the prosthesis. The postoperative course was uneventful and the patient was discharged without complication. She is doing well on the 14 months follow-up.

• Journal of Chest Surgery
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• v.6 no.2
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• pp.181-188
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• 1973

8 cases of the heart wound which had been successfully operated on were reported. These wounds were caused by knife in 6 cases, by traffic accident in one case and by explosion in one case, and clinically classified as Hemothorax type in 4 cases, acute Tamponade type in 3 cases and combined type in one case. Some important problems for the diagnosis and treatment of stab wound of the heart were also discussed.

• Journal of Chest Surgery
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• v.21 no.3
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• pp.601-606
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• 1988

Bronchial carcinoid was classified as one of the bronchial adenoma group and it was regarded as benign tumor because of its uniform histologic feature, predictable clinical course and good survivability after surgical resection. But recently, many authors described that bronchial carcinoid has low grade malignancy for its lymphatic spread and distant metastasis, especially atypical carcinoid. We had a case of typical bronchial carcinoid in 20 year old female patient, and successful operation was performed by bilobectomy of middle and lower lob of right lung. Postoperative course was uneventful and discharged without any complication.