• Journal of Nutrition and Health
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• v.26 no.5
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• pp.513-523
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• 1993

In this experiment, we investigated the hypolipidemic and antithrombotic effects of rats fed diets with different common oils in Korea for different feeding periods(4 weeks or 12 weeks), using Korean sesame oil, perilla oil, rice bran oil and mixed oil. W-3/w-6 ratio of each group was 0.001, 1.44, 0.03 and 0.112, respectively. P/S ratio of each group was 9.64, 10.49, 5.58 and 1.68, respectively. The result were as follows: 1) According to the age, body fat accumulation was increased. 2) Perilla oil(w-3 rich) decreased total lipid, triglyceride and total cholesterol, and increased HDL/total cholesterol ratio. 3) With regard to the compositono of platelet fatty acids, Perilla oil increased w-3/w-6 ratio of the platelet. Perilla oil lengthened bleeding time and decreased MDA(MalonDAdehyde) formation which determined in place of Thromboxane A2(TXA2) in platelet. This result can suggest that linoleic acid of perrilla oil seem to supress the conversion of linoleic acid to arachidonic acid(AA 20:4, w-6) and eicosapentaenoic acid(EPA, 20:5, w-3) trannnsformed from linolenic acid to suppress the conversion of arachidonic acid to TXA2. Since TXA2 is platelet-aggregating and vasoconstricting agent, the reduction of TXA2 tgeneration by platelet with increased linolenic acid intakes shows prologed bleeding time. In conclusion, w-3 rich perilla oil has strong hypolipidemic and antithrombotic effects by changing fatty acid profiles of the platelet.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.17 no.4
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• pp.379-388
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• 1995

This study was based on a series of 369 patients with Oral and Maxillofacial injuries treated at Kumi Hospital, College of Medicine, Soon-Chun-Hyang University from Jan. 1992 to Dec. 1994. The results obtained were as follows : 1. The number of male patient was 310 and that of female was 59, leading to 5.3 : 1 of male-female ratio, and the 3rd decade was the highest age group in incidence. 2. Weekly incidence was the highest in Sun. & Sat. and monthly incidence was the highest in Nov.& Oct. 3. Causes as follows : traffic accident 41.9%, slip& fall down 25.4%, human trouble 16.5%, industrial accident 7.5%, sports 6.7%, etc. 4. Site distribution as follows : mandible fracture 32.3%, maxilla fracture 4.8%, zygoma fracture 21.4%, nasal bone fracture 34.1%, orbital& ethmoidal fracture 4.6%. 5. The most common site of mandible was symphysis & angle, and the ratio of OR & CR was 1.3 : 1. 6. The most common site of maxilla was Le Fort 1, 2, and the ratio of OR & CR was 3 : 1. 7. The most common site of zygoma was body, the ratio of OR & CR was 3.3 : 1. 8 . The mean period of intermaxillary fixation was 4.33weeks. 9. Combined injury in facial fracture was 35.8% : The facial fracture were most frequently combind with head & neck(47.0%), upper extremities and abdomen(9.8%). 10. The mean elapsed time from injury to hospital was 1.9days, and that to operation was 5.1days. 11. The mean number of combined teeth injury was 0.6, and percent of combined soft tissue injury of face was 51.3%. 12. Post-operative complication occurred in 4 out of 323 cases. all of that was infection.

• Korean Journal of Head & Neck Oncology
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• v.8 no.2
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• pp.112-118
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• 1992

Neck mass as a primary presenting sign is a common problem that physicians and surgeons alike have to face but conclusive diagnosis cna be made only by histopathological examination. During the period of four years from January 1988 to December 1991, three hundred sixteen diagnostic incisional or excisional biopsies of the neck masses were performed at the outpatient department of Surgery, Seoul National University Hospital and tissue diagnoses were confirmed by histopatholotical examination. On which a clinical analysis was performed and its results were compared with the results of one hundred fifteen Fine Needle Aspiration Cytologic examinations on neck masses during the same period. The results were as follows: In the histologic types of neck masses. inflammatory disease was the most common (58.2%), metastatic malignant tumor(22.5%), benign tumor(15.2%). primary malignant tumor(0.4%) in decreasing order. Among the individual lesions. tuberculous lymphadenitis was the most common(29.4%) and nonspecific lymphadenitis was the next. Of overall sexual distribution, female preponderated by a ratio of 1.15:1, but in the primary and metastatic malignancies, male did by a ratio of 1.60:1 and 1.53:1, respectively. The most common age group was third decade(26.8%), and fourth decade was the next(20.9%) but in malignant tumors. sixth decade was the most commom. The duration of symptom between one and three months(33.8%), was the most common and between three and six month was the next but the difference between the individual diseases was not significant. Of the metastatic tumor of seventy one cases, primary site was found in fifty cases(84.2%) and stomach cancer was the most comon primary site. In the result of the Fine Needle Aspiration Cytologic(FNAC) examinations, positive for mlignant cells was the most common(33.1%), following the frequencies with tuberculosis(22.6%), and nonspecific lymphadenitis(16.5%) in decreasing order. Eleven cases of FNAC underwent diagnostic biopsies and the diagnostic accuracy of FNAC was 83.3%. Conclusively, in our study, tuberculous lymphadenitis was the most common histologic type, female was predominant third decade was the most common age group. the duration of symptom between one and three month was the most common and in the metastatic tumors, stomach cancer was the most common primary site.

• The Journal of Internal Korean Medicine
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• v.38 no.3
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• pp.336-352
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• 2017

Objective: This study investigated the perception, utilization, and satisfaction (in the general population), of the common cold treatment at the Korean Medical Clinic, to provide basic information for the development of Korean medicine clinical practice guidelines for the common cold. Method: A questionnaire was developed that consisted of questions about the general perception, utilization status, degree of satisfaction, willingness to use, and the improvement of the common cold treatment at the Korean Medical Clinic. An online survey was conducted using this questionnaire. Results: Three-hundred subjects responded to the survey. The results of the analysis were as follows. 1. 73.7% of the subjects recognized the common cold treatment at the Korean Medical Clinic. 2. 72% of the subjects had a positive perception of Korean medicine for common cold treatment. The major reason for the positive perception was the expectation about improving immunity and preventing recurrence. 3. Only 20% of the subjects had visited the Korean Medical Clinic for common cold treatment. The expensive cost was the major reason for not visiting the Korean Medical Clinic for common cold treatment. 4. The ratio of subjects who were willing to visit the Korean Medical Clinic for common cold treatment was 70%. 5. The expansion of health insurance coverage (67.7%), the activation of public relations (54.7%), and the development of a new herb medicine preparation that was easy to take (43.3%) were found to be necessary for improving the Korean medical service for common cold treatment. Conclusion: In spite of high recognition and positive perception, actual utilization of common cold treatment at the Korean Medical Clinic was relatively low. Multifaceted efforts are necessary to enhance the competitiveness of Korean medical service for treatment of the common cold.

• Archives of Plastic Surgery
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• v.35 no.3
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• pp.289-294
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• 2008

Purpose: The nasal bone fracture is known as the most common facial fracture. Several authors reported the classification of nasal bone fracture. Stranc classified the type of nasal fractures based on a pattern of impaction and level of injuries. Stranc classification proposed here is based on careful clinical observation and relates to both treatment and prognosis. The aim of this study is to determine any predictive value to the preoperative classification of nasal fracture, using the description by Stranc and Robertson. Methods: We reviewed 310 patients with nasal bone fracture treated at our hospital for last two years. Results: Lateral impact type of nasal bone fracture predominated more than frontal impact in the ratio of 2.3:1. The most common type of Stranc classification was lateral impact plane I(48.4%). Male predominated more than female in the ratio of 3:1. The most frequent age group was first decade(27.1%), second decade in frontal impact(30.5%), first decade in lateral impact (30.7%). The most common etiology was violence (31.3%) followed by slip down(21.3%), and traffic accident(18.1 %).The most common associated fracture was orbital(22.9%) followed by zygoma(10%), and maxilla (6.1%). The most common complication was septal deviation(20.0%) in frontal impact, and nasal deformity (26.0%) in lateral impact. The incidence of nasal deformity in lateral impact(26.0%) was more higher than frontal impact(15.8%) Conclusion: By assessing the pathomechanics and resultant degree of injury to the nasal skeleton, a better understanding of the treatment plan and prognosis was obtained. Using this information, satisfactory informed patient consent can be obtained.

• Journal of the Institute of Convergence Signal Processing
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• v.13 no.4
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• pp.201-206
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• 2012

The indirect-contact ECG measurement is a newly developed method for unconstrained and nonconscious measurement in daily life. This study introduced a new method of electrode circuit design developed for reducing the 60Hz power line noise observed at the indirect-contact ECG measurement. By the introduced common-mode-driven shielding, the voltage of the electrical shield surrounding the capacitive coupling electrode is maintained at the same as the common mode voltage. Though the method cannot reduce the level of common mode voltage itself, that reduces effectively the differential mode noise converted from the common mode voltage by the difference of cloth impedance between the two capacitive coupling electrode. The experiment results using the actual indirect-contact ECG showed that the 60Hz power line noise was reduced remarkably though the reduction ratio was smaller than the expected by the theory. Especially, the reduction ratio became large for the large difference of cloth. It is expected that the introduced method is useful for reducing the power line noise under condition of poor electrical grounding.

• Transactions of the Korean Society of Automotive Engineers
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• v.13 no.5
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• pp.75-81
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• 2005

An experimental study on homogeneous charge compression ignition combustion with direct fuel injection was conducted using a single cylinder common-rail diesel engine. To improve the homogeneity of fuel-air mixture, the premixed fuel (gasoline) was injected into premixing chamber and the diesel fuel was injected into the combustion chamber as an ignition source for the gasoline premixture. The experimental results show that soot emissions were dramatically reduced with the increase of fuel premixing ratio, however incomplete products such as HC and CO increased with the increase of the premixed ratio. Earlier injection of Dl diesel fuel increased the IMEP with the decrease of HC and CO concentrations.

• Journal of the Korean Institute of Gas
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• v.20 no.4
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• pp.44-49
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• 2016

This paper presents characteristics of diesel combustion and emissions according to adoption of various combustion chamber geometry. In order to suggest suitable combustion chamber geometry of the common rail diesel engine for electric generative use, 5 type of geometry chamber was found performance for combustion chamber to respond fuel efficiency. Combustion chamber geometry affects combustion characteristics due to change target area of spray in the combustion chamber and the main factor was the bowl aspect ratio of combustion chamber. Using the results of simulation, the effects of the variable combustion chamber can be improved the fuel efficiency for electric generation.

• Journal of Chest Surgery
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• v.25 no.3
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• pp.283-288
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• 1992

From january 1970 through december 1990, 130 cases of patients with chest penetrating injury were admitted to department of thoracic and cardiovascular surgery in Chosun University Hospital. We analyzed above patients and obtained results were as follows: 1. The ratio of male to female was 7.1:1 in male predominance, and the majority[69.6%] was distributed from 2nd to 3rd decade. 2. The most common cause of chest penetrating injuries was stab wound. 3. 110 cases[84.5%] were arrived to our emergency room within six hours after trauma. 4. The most common injuring mode was hemo, pneumothorax. 5. The frequently injured site of the penetrating chest trauma was left side of the chest [64.65%]. 6. The common associated injuries of penetrating chest injuries were extremities injuries, abdominal injuries, head & facial injuries. 7. The common method of surgical treatment were closed thoracostomy[78 cases], open thoracotomy[20 cases], laparatomy[12 cases]. 8. The overall motality was 3.07%[4/130], and the causes were hypovolemic shock, sepsis and asphyxia.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.11a
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• pp.43-44
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• 2006

We have studied electro-optical characteristics and stability of liquid crystal director depending on electrode patterning of common electrode on top substrate in patterned vertical alignment (PVA) mode. In the present studies, new type of common electrode pattern was suggested to enhance a dark state by reducing interference area due to data signal. According to the simulation result, PVA device with new common electrode pattern contributed to Improvement of an aperture ratio.