• 한국분말재료학회지
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• 제27권1호
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• pp.58-62
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• 2020

Recently, electrochromic devices (ECDs) have gathered increasing attention owing to their high color contrast and memory effect, which make them highly applicable to smart windows, auto-dimming mirrors, sensors, etc. Traditional ECDs have a sandwich structure that contains an electrochromic layer between two ITO substrates. These sandwich-type devices are usually fabricated through the lamination of two electrodes and followed by the injection of a liquid electrolyte in the inner space. However, this process is sometimes complex and time consuming. In this study, we fabricated ECDs with a lateral electrode structure that uses only an ITO substrate and an all-in-one electrochromic gel, which is a mixture of electrolyte and electrochromic material. Furthermore, we investigated the EC properties of the lateral-type device by comparing it with a sandwich-type device. The lateral-type ECD shows strong blue absorption as the applied voltage increases and has a competitive coloration efficiency compared to the sandwich-type device.

• Journal of Chest Surgery
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• 제11권1호
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• pp.46-57
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• 1978

Ventricular septal defect was the most common congenital Heart disease admitted to the Severance Hospital from December, 1963 to June 30. 1977. A total of 1,811 cardiac patients received cardiac catheterization in the CardiacCenter of Yonsei University Medical College. Out of the 1,811 cardiac patients, 791 cases had congenital heart disease and of these 172 cases had ventricular septal defect. This amounted to 21.7% of all those with congenital heart disease. Seventy cases of ventricular septal defect operated on in the chest surgery department are presented. Of these 70 cases of ventricular septal defect, 54 cases were male and 16 cases were female. Their ages ranged from 4/12 months to 32 years. The ratio of systolic pressure of the main pulmonary to systemic artery [Pp/Ps] for 29 of the 59 isolated ventricular septal defects was below 45 percent. Pp/Ps ratio for 19 of the 59 isolated ventricular septal defects was 75 percent. The patients were mostly below fifteen years of age. Out of 64 cases, there were 36 cases of type II defects, 20 cases of type I, 4 cases of type III , 2 cases of type IV, one case of both type II and one case of left ventricular right atrial communication. The anomalies associated with ventricular septal defect were 13 in all; 4 cases of aortic insufficiency, 3 cases of ruptured aneurysm of the sortie sinus of valsalva, 2 cases of ruptured aneurysm of the sortie sinus of valsalva with aortic insufficiency, 2 cases of patent ductus arteriosus, one case of ruptured aneurysm of the aortic sinus of valsalva with atrial septal defect [secundum type] and one case of atrial septal defect [secundum type]. Overall mortality was 8.6 percent. The mortality in pulmonary artery banding was 37.5 percent. The causes of mortality were in one case congestive heart failure, in one case asphyxia and in one case respiratory insufficiency. Tile mortality in ventricular septal defect associated with pulmonary hypertension was 7.1 percent. The cause of mortality was in one case low cardiac output syndrome. There was no mortality in the ventricular septal defects without pulmonary hypertension and mortality in the ventricular septal defect. In ventricular septal defect associated with combined anomalies, the causes mortality were in one case respiratory insufficiency and in one case congestive heart failure.

• 한국게임학회 논문지
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• 제12권1호
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• pp.15-24
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• 2012

기능성게임은 목적성 게임이므로 플레이를 통해 원하는 목적을 달성하도록 개발되고 사용자 또한 플레이 목적을 달성하기 원한다. 성취도 평가 기능은 기능성게임의 품질에 중요한 영역이다. 본 연구에서는 기능성게임의 성취도 평가 유형을 일체형, 복합형, 분리형의 3가지 유형으로 정의하였다. 이에 따라 기능성게임들이 어떤 형태의 성취도 평가 유형을 사용하는지 분석하였다. 그 결과 게임성을 높이 활용한 것들은 대개 일체형을, 기능성게임의 목적에 충실하고자 한 것들은 분리형과 복합형을 더 사용한 것으로 나타났다. 또한 선호하는 성취도 평가 기능의 조사에서 사용자들은 전반적으로 일체형을 선호하는 것으로 나타났다. 본 연구는 플레이 목적 달성과 사용자에게 더 높은 만족감을 줄 수 있는 성취도 평가 기능 설계에 참고 자료가 될 것으로 기대한다.

• 재활복지공학회논문지
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• 제6권1호
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• pp.45-50
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• 2012

흉 요추 보조기는 후만증 관련 증상의 진행을 예방하고 통증을 완화시키기 위한 목적으로 노인성 후만증 환자의 재활을 위하여 이용되고 있다. 최근 다양한 형태의 흉 요추 보조기가 개발되고 있으나 생체역학적 효과에 관한 연구가 미흡한 실정이다. 따라서 본 연구에서는 세 가지 형태 (Type 1, one-connecting frame type; Type 2, two-connecting frame type; Type 3, all-in-one type)의 흉 요추 보조기와 몸통 (trunk)의 유한요소 모델을 구현하여 보조기 착용 후 운동성 변화에 따른 몸통에서의 압력 분포 및 보조기의 응력을 비교 분석하였다. 신전 운동 시 몸통에서 확인되는 압력의 분산은 일체형의 형태를 가지는 Type 3에 의해서 가장 고르게 이루어졌으며 connecting frame 형태의 Type 1과 Type 2의 압력 분포 패턴은 크게 차이가 나지 않았다. 보조기 착용에 따른 몸통의 운동성은 Type 2 ($11.3{\sim}13.9^{\circ}$), Type 1 ($12.1{\sim}15.4^{\circ}$)와 비교하여 Type 3 ($8.5{\sim}9.4^{\circ}$)에 의하여 가장 크게 제한되었다. 모든 Type의 보조기는 20% 미만의 파단 가능성을 보였다. 따라서, 보조기 착용에 따른 등압 분포 및 운동성의 결과로 미루어 볼 때, 일체형의 흉 요추 보조기가 후만증 환자 재활에 있어 높은 효과를 제공할 것으로 사료된다.

• Journal of Chest Surgery
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• 제8권1호
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• pp.69-74
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• 1975

Twenty-nine cases of ventricular septal defect operated in this department during the period from 1969 to May 1975 were presented. Out of 29 cases, there were 20 cases of type II defects, 8 cases of type I, and one case of type III, and the last case was multiple defect. The anomalies associated with ventricular septal defect were eight in all; three patent ductus arteriosus, one atrial septal defect, one tricuspid insufficiency and an aortic insufficiency. Over all mortality was 17%. The causes of death were complete heart block in a case, respiratory distress due to excessive administration of morphine in one, low cardiac output in two and perforation of the aortic annulus after repair of the ventricular septal defect associated with aortic insufficiency.

• 한국생활과학회지
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• 제11권3호
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• pp.307-319
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• 2002

We studied on the development of clothing pressure measurement system for wear comfort of foundations(girdle, brassiere, all-in-one). Measurements of clothing pressure were made on subjects wearing girdles, brassieres, all-in-ones of several type(material, size) using by CPMS(clothing pressure measurement system: Tech-Storm. Co). Wearing experiments have been carried out using nine women in the twenties and six women in the forties. The results obtained are as follows: 1. The clothing pressure applied by girdle was higher in the hard type than the soft type by $5-10gf/cm^2$, also recorded a high clothing pressure at points of waist band line and thigh lateral. 2. Clothing pressure of brassiere with wire was high at the point of underbust line and shoulder strap. Pressure for 40s showed higher than 20s by $6-7gf/cm^2$. 3. The pressures of abdominal part applied by both of girdle and all-in-one were much greater than those of girdle or all-in-one. 4. We demonstrated the adaptability and conformity of the CPMS by inquiring into the clothing pressure of various foundations.

• The Journal of Korean Physical Therapy
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• 제22권6호
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• pp.53-58
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• 2010

Purpose: Our goal was to determine the difference in motor recovery between two stroke types: the corona radiata (CR) infarct type and the intracerebral hemorrhage (ICH) type, by using assessment methods for motor functions. Methods: Forty subjects who were diagnosed as having had a stroke with an infarct (men: 11, women: 9, mean age: $62.25{\pm}7.59$) or a stroke with an ICH (men: 12, women: 8, mean age: $59.75{\pm}6.11$) were recruited. In all subjects, motor functions of the affected extremities were measured 2 times: at stroke onset (initial) and 6 months after the onset (final) by the motricity index (MI), the modified Brunnstrom classification (MBC), and functional ambulatory category (FAC). We compared the final assessment with the initial one. Results: Motor functions of all patients improved with the passing of time. All scores of motor function assessment in the ICH type were higher than in the infarct type. Comparing the initial assessment with the final one, upper MI and MBC scores of the upper extremities were significantly different between the two stroke types (p<0.05), but lower MI and FAC scores of the lower extremities were not (p>0.05). Conclusion: These findings imply that patterns of motor recovery in patients with either the infarct type or the ICH type of stroke change for the better over time. The degree of motor recovery in the ICH type was better than in the infarct type. Therefore, one can introduce clinical interventions by the aspect of progress in functional motor recovery.

• Journal of Chest Surgery
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• 제12권3호
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• pp.233-239
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• 1979

Ventricular septal defect associated with patent ductus arteriosus is well known cardiac anomaly that can be treated successfully by operation. This anomaly is found at low frequency. Seven cases of the combined malformation were operated on during the period from 1959 to 1978 in the Department of Thoracic Surgery, Seoul National University Hospital. Right heart catheterization and retrograde aortogram can diagnose the disease correctly. Staged operation in one case and one-stage operation in 5 patients were done. In all cases of the open heart surgery the closure of the ductus was done by transpulmonary suture of the PDA opening. Among 6 patients of the open heart surgery 2 operative death [33.3%] and one late death [total 50%] were noted. Four type II and one type I and one Type IV VSDs were found. In one case the anomaly was accompanied with aortic insufficiency by herniation of the right coronary cusp through Type I VSD.

• 인터넷정보학회논문지
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• 제5권3호
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• pp.45-56
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• 2004

본 논문에서는 네트워크가 많은 endpoint를 가질지라도 낮은 비트율의 데이터를 효율적으로 전송할 수 있는 AAL 유형 2 스위치를 포함하는 ATM스위치 구조를 제안한다. 컴퓨터 프로그램으로 모델링한 ATM스위치는 AAL 유형 1, AAL 유형 2, AAL 유형 3/4 및 AAL 유형 5 셀로 이루어진 모든 유형의 AAL 셀에 대해 셀 스위칭을 지원하고 있다. 우리는 2가지 방식의 스위치를 제안하고 있는데, 하나는 개별적인 입력 포트마다 AAL 유형 2 셀 처리를 지원하는 스위치 패브릭이고, 다른 하나는 모든 입력 포트에 대한 전체적인 AAL 셀 처리를 지원하는 스위치 패브릭이다. 시뮬레이션 결과는 후자의 방식이 전자의 방식보다 우수한 것으로 나타났다. 그러나, 전자의 방식이 구현이 용이하고, 확장성에 대한 장점을 가지고 있다. 따라서 본 논문에서는 전자의 방식을 채용한 AAL 유형 2 스위치 모듈을 VHDL 언어를 사용하여 설계하였으며, 이를 FPGA로 구현하였다. 설계된 칩은 52MHz에서 동작하였다. 본 논문의 ATM 스위치 패브릭은 범용의 ATM 스위치 패브릭으로서 뿐만 아니라 ATM 네트워크상으로 모바일 통신, 협대역 서비스 및 무선 ATM등에 폭넓게 응용될 것으로 사료된다.

• 한국식품위생안전성학회지
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• 제12권1호
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• pp.26-38
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• 1997

The quality changes of hams and sausages in refrigerated storage were investigated. Seven types of hams and six types of sausages produced in Korea were collected from markets and stored at 1$0^{\circ}C$ according to the Food Code of Korea, and then chemical, microbiological, textural and sensory characteristics were evaluated at 30, 40 and 50 days. The proximal analysis showed considerable variation in fat with less variation in moisture and protein. The pH values of hams and sausages slightly changed with no consistent difference. Water activity values of all samples except one type of sausage were consistent over time in refrigerated storage. No purge losses of hams were observed except two types of samples in the intial stage. Several types of sausages showed purge losses with no consistency and one type of sausage showed consistent purge losses (0.44~11.29%) during the storage. The volatile basic nitrogen (VBN) content of hams and sausages was still within 20 mg% (Standard and Specification of Korea) on the 50th day, although the VBN of all samples significantly increased over time (p<0.05). The thiobarbituric acid (TBA) values of hams and sausages were well below 1.0 during the storage, although the TBA values of all samples significantly increased (p<0.05). However it was noticed that one type of ham and two types of sausages showed TBA values of 0.945, 0.928 and 0.978, respectively. All the standard plate counts (SPCs) of hams during the storage period showed a level below 30 CFU/g except one type of sample with 103 CFU/g at 50 days. All the SPCs of sausages showed a level below 50 CFU/g except one type of sample with 102 CFU/g and two types of samples with 104 CFU/g on the 50th day. Coliform groups were not counted in all samples during the storage. Instrumental texture analysis showed that springiness, cohesiveness, chewiness, gumminess and adhesiveness slightly changed with no consistent difference. The hardness of the hams showed a decreasing tendency, and the hardness of the sausages an increasing tendency with no significant difference. Sensory evaluation for color, flavor, taste, texture and overall acceptability showed decreasing tendencies over time (p<0.05). The scores of the five sensory characteristics maintained the medium level of quality at the termination of the experiment. Although the results indicated that the ham and sausage samples were acceptable after the 50 days' storage at 1$0^{\circ}C$, the shelf-life of the samples should be determined considering the rapid growth of bacteria and the high TBA values at 50 days.