• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.16 no.3
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• pp.389-396
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• 2018

The Kori-1 Nuclear Power Plant (NPP), WH 2-Loop Pressurized Water Reactor (PWR) operated for approximately 40 years in Korea, was permanently ceased on June 18, 2017. To reduce worker exposure to radiation by reducing the dose rate in the system before starting main decommissioning activities, the permanently ceased Kori-1 NPP will be subjected to full system decontamination. Generally, the range of system decontamination includes Reactor Pressure Vessels (RPV), Pressurizer (PZR), Steam Generators (SG), Chemical & Volume Control System (CVCS), Residual Heat Removal System (RHRS), and Reactor Coolant System (RCS) piping. In order to decontaminate these systems and equipment in an effective manner, it is necessary to evaluate the influence of the flow characteristics in the RCS during the decontamination period. There are various methods of providing circulating flow rate to the system decontamination. In this paper, the flow characteristics in Kori-1 NPP reactor coolant according to RHR pump operation were evaluated. The evaluation results showed that system decontamination using an RHR pump was not effective at decontamination due first to impurities deposited in piping and equipment, and second to the extreme flow unbalance in the RCS caused deposition of impurities.

• Journal of Trauma and Injury
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• v.28 no.4
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• pp.232-240
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• 2015

Purpose: Thoracic aortic injury is a life-threatening injury that has been traditionally treated by using surgical management. Recently, thoracic endovascular aortic repair (TEVAR) has been conducted pervasively as a better alternative treatment method. Therefore, this study will focus on analyzing the outcome of TEVAR in patients suffering from a blunt thoracic aortic injury. Methods: Of the blunt thoracic aortic injury patients admitted to Eulji University Hospital, this research focused on the 11 patients who had received TEVAR during the period from January 2008 to April 2014. Results: Seven of the 11 patients were male. At the time of admission, the mean systolic pressure was $105.64{\pm}24.60mm\;Hg$, and the mean heart rate was $103.64{\pm}20.02per$ minute. The median interval from arrival to repair was 7 (4, 47) hours. The mean stay in the ICU was $21.82{\pm}16.37hours$. In three patients, a chimney graft technique was also performed to save the left subclavian artery. In one patient, a debranching of the aortic arch vessels was performed. In two patients, the left subclavian artery was totally covered. In one patient whose proximal aortic neck length was insufficient, the landing zone was extended by using a prophylactic left subclavian artery to left common carotid artery bypass before TEVAR. There were no operative mortalities, but a patient who was covered of left subclavian artery died from ischemic brain injury. Complications such as migration, endovascular leakage, collapse, infection and thrombus did not occur. Conclusion: Our short-term outcomes of TEVAR for blunt thoracic aorta injury was feasible. Left subclavian artery may be sacrificed if the proximal landing zone is short, but several methods to continue the perfusion should be considered.

• Journal of the Korean Society for Nondestructive Testing
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• v.19 no.5
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• pp.356-362
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• 1999

Based on the assumption that film density increases exponentially with exposure in the industrial radiographic film. an equation representing the characteristic curves of industrial radiographic films and a new density-thickness relation are suggested. The accuracy and reliability of the suggested relation has been tested using radiographs of a carbon steel step wedge with known thickness variation by polychromatic X-ray and ${\gamma}$-ray ($Ir^{192}$). The experimental results were well agreed to the proposed relation in the range of film densities from 1.0 to 3.5 and it was more accurate than the conventional relation. It is also found that ${\gamma}$-ray is more effective in this purpose than polychromatic X-ray, which results in variation of effective linear absorption coefficient due to beam hardening effect as thickness increases. Therefore using the equation and experimentally determined parameters the quantitative evaluation of thickness variation is possible and it can be used to evaluate the depth of local corrosion of pressure vessels in plants.

• Journal of the korean academy of Pediatric Dentistry
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• v.33 no.3
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• pp.522-528
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• 2006

When tooth is displaced within the alveolar bone, it could apply pressure and rupture the apical vessels. Pulpal reaction in such case is affected by the stage of root formation, amount of intrusion and pulpal infection. Determining the need of pulp treatment depends on the pulp vitality. Therefore, periodic vitality tests, coronal color changes and radiographic root resorption signs should be observed through periodic post-trauma follow-up. Pulp necrosis, pulp canal obliteration, external root resorption, root ankylosis and marginal bone loss could result from periodontal injuries. Negative sign changes from positive signs of vitality tests suggest pulp necrosis. In this case, pulp treatment should be held before root resorption occurs. By comparing the following two cases, complications of intrusion and factors producing them could be confirmed, thus we propose to report these two cases.

• Journal of Korean Academy of Nursing
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• v.27 no.2
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• pp.433-443
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• 1997

Cardiac catheterization is a diagnostic procedure which is intrusive and anxiety provoking. Patient education and information offer have been suggested as effective nursing interventions to reduce patients' anxiety and stress. Main objectives of this study are : 1) to develop concrete objective information for patients undergoing cardiac catheterization : 2) to analyze the types of information included in the newly developed concrete objective information. The subjects of this study are 11 patients who were admitted to the CCU of a general hospital in Seoul. The subjects were provided with preparatory information about cardiac catheterization by using interview and a booklet. After the procedure, the subjects were asked to describe additional information which they suggest to be added into the booklet and the physical sensations felt during the procedure. The results of the study are summarized as follows : Most subjects were satisfied with the preparatory information that was provided by interview and the booklet before the procedure. But patients suggested several problems related to the content of the booklet. First, they reported difficulty to differentiate the terms -coronary angio gram and cardiac catheterization. Also, some patients expressed that they feared after reading the information about the incision of inguinal area. Subjects responded that the information about the direct process of the test did not reduce their anxiety and the information was not detail enough. Next, most subjects would want to know about the monitor and the sound from monitor. They said that they could not hear instructions from doctor or nurse during the procedure due to tension. Considering above response results, the need for more effective way to provide information, like visual and auditory information through video tape for giving information is suggested. Sensations related to the procedure were the smell coming from sterilization of inguinal area, stinging pain in groin when the doctor inserts a needle into artery, and the sensation of pressure and moving of vessels surrounding neck when the catheter was inserted and visualized on fluoroscopy. Besides, subject reported hot sensation and burning feeling in face and chest area, and nausea when dye is injected by hand. In the analysis of information content, there was 79% agreement on the actual units of analysis that were coded. In the analysis of type of information, procedural information was 60.4%. Concrete objective information was 28.1%. and other information was 11.5%. Agreement of the coders in categorizing the units of information was determined by using Cohen's kappa which corrects for chance agreement. Cohen's kappa was .84.

• Journal of Advanced Marine Engineering and Technology
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• v.38 no.6
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• pp.681-687
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• 2014

The objective of this work presented here was focused on analysis of in-cylinder combustion characteristic, engine performance, and nitrogen oxides emission characteristic from marine gas oil for propulsion diesel engine of naval vessels and biodiesel with fuel injection timing in a single cylinder diesel engine. In addition, combustion process was analyzed with a high speed camera of marine gas oil and biodiesel fuel. Retarding the fuel injection timing from $BTDC25^{\circ}CA$ to $BTDC5^{\circ}CA$, in cylinder peak combustion pressure was gradually decreased, however, engine torque showed a tendency to increase. The highest nitrogen oxides level was measured at $BTDC15^{\circ}CA$, they were reduced at retarded and advanced condition on the basis of $BTDC15^{\circ}CA$. Comparing with combustion process of marine gas oil and biodiesel fuel at $BTDC5^{\circ}CA$, self-ignition timing of biodiesel fuel included oxygen content was faster than marine gas oil, however, a cautious observation indicates a slightly higher flame intensity for marin gas oil than biodiesel as a diffusion flame is developing.

• Journal of Society of Preventive Korean Medicine
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• v.7 no.2
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• pp.121-130
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• 2003

The Musculoskeletal Disease has been ignored or turned away due to the difficulty of diagnosis and the vagueness of judgement up to now. Contrary to other diseases, there were many cases where the character of the Musculoskeletal Disease wasn't revealed through the objective inspection. And that's because the Musculoskeletal Disease appears for the most part due to muscular defect so it is impossible to diagnose the muscle by X-ray diagnosing the bone and it is also impossible to diagnose the fine damage of the muscle or tendon even by advanced device like MRI. As the nervous blood vessels or acupunctures pass through or are next to the muscle, the tension of the muscle put pressure on these so can become the direct or indirect causes of various kinds of pains or intern diseases. But in spite of that, for lack of proper equipment diagnosing the state of the muscle(Shortened.. Relaxed... or Hardened...) the muscle has been disregarded or neglected intentionally or unintentionally. While many people think themselves to be a muscular expert, if they don't see the shape of the muscle, that is just like blind treatment. But as now the equipment diagnosing the state of the muscle is developed, it seems that this problem can be settled. It was attempted in this study that the muscle or skeleton of the Musculoskeletal disease patients was diagno the treatment order and method were decided by a questionnaire survey and simple inspection, and the Musculoskeletal correction exercise using the muscle management and sling system made them escape from the Musculoskeletal disease, turning their muscle into more flexible and stronger muscle. As a result notwithstanding the limited treatment period '12 times', the improvement rate was as high as 74%, which showed that the muscle management and Musculoskeletal correction exercise had a great effect on the symptom improvement of the patients. If the treatment times had increased, the improvement rate also would have increased more.

• Journal of Chest Surgery
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• v.19 no.4
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• pp.569-577
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• 1986

Between October 1979 and June 1986, modified Fontan procedures have been performed on 22 patients by the Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine. Twelve patients had tricuspid atresia; one, congenital tricuspid stenosis; five, single ventricle; two, I-transposition of the great vessels; one, double outlet right ventricle, and one, pulmonary atresia with an intact ventricular septum. There were 9 operative deaths [mortality; 40.9%]. The causes of death were right heart failure in six patients and pulmonary venous hypertension in one who misdiagnosed preoperatively. Another two were deceased due to sepsis and cerebrovascular accident at postoperative 35 and 34 days in each. There were 7 patients below 4 years of age at the time of operation and among them 4 patients were deceased. The operative death was not related with patients` age above and below 4[p=0.211]. The relation between operative death of tricuspid anomaly and another cardiac malformations was statistically significant [p=0.048]. The operative procedures with or without valved conduit [woven dacron] was related significantly [p=0.043] in the case of the 21 of the patients, but the modified Fontan operation with a valved conduit was performed early stage in this series. Since 1982, we operated on 4 patients, doing a right atrium-right ventricle anastomosis without a conduit. All survived and remained in functional class I [NYHA]. The right atrial pressure [RAP] was elevated significantly after operation [mean 9.9$\pm$4.8 ~16.9$\pm$3.6 mmHg, p<0.001]. The relation between the postoperative RAP of the survival group [16.5$\pm$4.3 mmHg] and the group who died [17.4$\pm$2.2 mmHg] was statistically significant [p=0.047]. There was no relation between any operative death and any previous palliation. All patients were followed for 4 months to 80 months, except one who was lost to follow up at 2 months following surgery [mean 11.4 months, 238 patient. months]. All were in functional class I with 5 on medications and 7 not. One was reoperated at 70 months following the first operation, due to conduit stenosis. She was moderately impaired in activity, with hepatomegaly after the second operation.

• Journal of Physiology & Pathology in Korean Medicine
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• v.22 no.1
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• pp.13-24
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• 2008

This Chapter mentioned Terror and Palpitation due to Fright(驚悸) and Hemorrhagic disease(血證). Terror and Palpitation due to FrightAcctually Terror(驚) is different from Palpitation(悸). Terror(驚) is one of the seven emotions. But in this case, It refer to the Palpitation and the uneasiness of mind due to one's hearing a strange sound of seeing a strange. Tremulous Pulse can be appear. So Terror(驚) is caused by Exopathic Factors(外因) and belongs to Excess syndrome(實證). Palpitaion(悸) is the sensation of plamus, palpitation and unrest not because of being frightened. It is usurally caused by the deficiency of Ki(氣) and blood(血). So Deep, Thready and weak pulse can be appear. So Palpitaion(悸) is caused by Endopathic Factors and belongs to Deficiency Syndrome. In this Chapter, Terror and Palpitation due to Fright(驚悸) treat with the Kyeji-ke-jakyak-ka-chokchil-moryu-yongkol-kuyuk-tang(桂枝去芍藥加蜀漆牡蠣龍骨救逆湯) and Banha-mahwang-hwan(半夏麻黃丸). There are two type in Hemorrhagic disease(血證). One is bleeding(出血) and another is blood stasis(瘀血). The contents which relate with the Hemorrhagic disease(血證) are Hematemisis(吐血), Rhinorrhagia, Hemafecia(下血). In hemorrhage pathological mechanisms, there are two mechanisms. One is that Fire and Heat(火熱) pressure blood. Another is that cold and deficiency(虛寒) disable Ki(氣) from keeping blood flowing within vessels. Blood stasis(瘀血) can be called Extravasated Blood(惡血), Coagulated Blood, Blood retention(蓄血,積血), Dead Blood(死血) and Emaciation due to Blood disorder(乾血). It refer to a morbid state of unsmooth circulation and blood stagnancy often resulting from Ki(氣) stagnation, Ki(氣) deficiency and accumulation of pathogenic coldness. The symptom of Blood stasis are 'Fullness sensation in the chest, Lip Flaccidity, Cyonotic Tongue and Dryness of Mouth'. And the man who have Blood stasis, want to rinse his mouth with the water, but he can't drink the water because there isn't interior Heat of Excess Type. The symptom of Cyonotic Tongue(舌靑) had influence on diagnosing Blood stasis(瘀血) in offspring.

• The Journal of Internal Korean Medicine
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• v.26 no.1
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• pp.182-198
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• 2005

Object : This study was designed to research whether the protection and inhibitory effects of cardiovascular diseases in L-NAME induced rat or ECV 304 cell lines through the Cell morphological pattern, Tunel assay, LDH activity, heart rate, blood pressure and immunohistochemistric analysis by Boonsimgieum water extract Methods : Nitric oxide(NO) play an important role in normal and pathophysiological cells including as a messenger molecule, neurotransmitter, microbiocidal agent, or dilator of blood vessels and artheriosclerosis, hypertension, myocardial infarction, respectively. Endothelial cell products can modulate the magnitude of a response to a vasoconstrictor, as evinced by the greater constriction after endothelium removal or NO synthesis blockade. To investigate that Boonsimgieum in the potential contribution of the levels of nitric oxide generated by endothelial nitric oxide synthase (eNOS) and the mechanisms of protection against NG-nitro-L-arginine methyl ester (L-NAME), human ECV 304 cells, which normally do not express eNOS, were expressed by L-NAME. L-NAME stimulated rat or cells were found to be resistant to injury and delayed death following the Boonsimgieum. Inhibition of nitric oxide synthesis abolished the protective effect against L-NAME, thrombin and collagen exposure. Interestingly, such effects have been observed during stimulation with agents such as phenylephrine and KCl on L-NAME mediate rats, were damaged by the NOS inhibitor L-NAME. Result : As the result of this study, In group, the anti-apoptosis and necrosis in the cardiovascular system have a potential capacity for prevented, protected and treating the diseases of cardiovascular system, against the necrosis of rat and ECV 304 cells with Caspase 3 and calpain expression by L-NAME is promoted. Conclusion : these results demonstrate neuroprotective and memory enhancing effects of ZIBU, suggesting its beneficial actions for the treatment of AD.