http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
예혼합 압축 착화 엔진용 고압 인젝터의 분무특성과 분사조건 최적화에 관한 기초 연구
류재덕 ( Jea Duk Ryu ),김형민 ( Hyung Min Kim ),이기형 ( Ki Hyung Lee ),이창식 ( Chang Sik Lee ) 한국분무공학회 2004 한국액체미립화학회지 Vol.9 No.1
N/A The purpose of this study was to investigate the fuel spray characteristics that made most important at an homogeneous air fuel mixture, in a common rail direct injection type HCCI engine. As a study conducted relation which a back pressure and injection pressure are influenced to air fuel mixture characteristics, we tried to offer date even through we select suitable to a HCCI engine running condition of the fuel injection condition. To accomplish the study, to measure a injection rate of common rail type injector and to visualize and simulate a fuel spray was conducted. From the result of injection rate, a common rail injector was confirmed to appear a initial delay of 0.3msec and a latter period delay of 0.7msec. Therefore, real injection duration was determined by about 0.5msec increasing. From the result of fuel spray, the spray penetration was proportional to 1/4 exponent of atmosphere pressure. An experimental equation was deduced from the spray penetration of spray visualization experiment and the relation of injection duration and penetration was estimated in HCCI engine using an experimental equation.
Eun-joo Jung(Eun-joo Jung),Duk-hyun An(Duk-hyun An),Won-gyu Yoo(Won-gyu Yoo),Tae-hoon Kim(Tae-hoon Kim),Il-bong Park(Il-bong Park),Jea-seop Oh(Jea-seop Oh) KEMA학회 2022 근골격계과학기술학회 Vol.6 No.1
Background The Pilates method has recently been recommended as the best way to improve spinal stability by strengthening the trunk and gluteus maximus (GM) muscles. Purpose In this study, we compared trunk and GM muscle activities and pelvic rotation angles during four traditional Pilates exercises. Study design Cross-sectional study Methods Twenty healthy volunteers were recruited for this study. During the four exercises, the activity of the trunk and GM muscles were measured via electromyography and pelvic rotation was measured using a smart phone-based measurement tool. Results The activities of the transverse abdominis/internal oblique and external oblique muscles were highest during the leg pull front (LPF) compared to the other exercises. GM activity was significantly higher during the LPF compared to the shoulder bridge and swimming (SW), but not during the one leg kick (OLK). Multifidus (MF) activity was significantly higher during SW than during the other exercises. There were no significant differences in MF activity between the SW and OLK exercises. Pelvic rotation angle was significantly reduced during the OLK compared to the LPF (p=0.004). Conclusions We recommend the LPF exercise if the goal is increased trunk and GM muscle activity and the SW exercise if you target for increased MF activity. The OLK exercise is useful for activating the trunk and GM muscles while reducing uncontrolled pelvic movements.
羅濟民,吳世德 慶熙大學校 1991 論文集 Vol.20 No.-
This study evaluates the education of High School in Korea based on the theory of psychological type differences originally elaborate by Carl Gustav Jung and later operationalized by Isabel B. Myers and Katherine Briggs. For the evaluation a student body of 2,341 tenth grader from three senior high school. Their personality types along with their intelligence quotients are obtained to get correlated with their scholastic achievements on the six-teen to seventeen courses they have taken during the first semester of their tenth grade year. In all, two sets of finding are made on the relationship among the intelligence quotient, scholastic achievements and personality type differences. The first set is ⑴ on the relationship between the personality type differences and intelligence quotient and ⑵ on the relationship between the personality type differences and intelligent quotient on the one hand and the scholastic achievements on the other. It is found that the explanatory power of the personality type differences on intelligence quotient in rather low : 6.6%(r^2=0.6643, multiple r=0.25774, p<.001)for the 1st Senior High, 2.7%(r^2=0.02716, multiple r=0.16481, p<.001)for the 2nd Senior high, and 9.5%(r^2=0.9463, multiple r=0.30761, p<.001)for the 3rd Senior High. On the other hand, the explanatory power of the personality type differences and intelligence quotient combined together on the scholastic achievements is rather high : 37.4% (multiple r=0.61130, p<.001)for the 1st Senior high, 28.7%(multiple r=0.53545, p<.001)for the second Senior High, and 46.6%(multiple r=0.68293, p<.001)for the 3rd Senior High. The second set if on those students who achieve higher than they are expected to achieve for a given amount of their aptitude and type differences(overachievers)and those students who achieve lower than they are expected(underachivers). When their scholastic(Z scores)are measured on the Y axis against their intelligence quotient(Z scores)are measured on the Y axis against their intelligence quotient(Z scores)on the X axis, the regression line of 47 drawn on the graph reveals the following ten tendencies : 1. All the J type but ESFJ of the 3rd Senior High are above the regression line, and all P types but INPT of the 1st Senior High and ISTP of the 2nd Senior High are below the line. The J types consistently achieve higher grades for given amount of aptitude : that is, they overachieve. The P types get grades lower than expected for their level of aptitude, that is, they underachieve. 2. Both INT types in the 1st and the 3rd Senior Highs are high, but INTJ is three times as far above the line as INTP in the 1st Senior High and slightly above the line as INTP in the 2nd Senior High. ESFJs in the three Senior Highs are far above ESFP : and ENFJ is three times as far above as ESFP but in the 1st Senior High where both nearly equal. These differences show the clear advantage of J. 3. The S types fall near or below the mean is IQ for their classes, and the N types fall near or above the mean. 4. The four preferences that appear to contribute most to scholastic success are I, N, T, and J. 5. The above four findings are also true to the findings made by Isabel B. Myers and Mary M. McCaulley for high school in the United States. However, the following five findings are different. 6. INFJ who is theoretically expected to overachieve underachieves in all of the three Senior Highs. Among the NFs, NFPs tend to underachieve most. 7. SFPs also underachieve in all of the three Senior Highs. 8. SP types and NP types are the consistent underachieves in all of the three Senior High Schools. 9. The three preferences that appear to contribute least to scholastic success are F, S, and T. 10. The preferences of E and I appear to contribute nearly in equal degree to scholastic success. The last five findings are consistently different from the tendencies found by Myers and McCaulley for the high schools in the United States. The findings explain the difference between the high schools of Korea and those of the United States. Under the Korean System NF, SF and SP types who number 1,386 (59.2% of 2,341 students) consistently achieve lower grades for a given amount of their aptitude : that is, they are underachievers.
신생아 황달에서 99mTc-HIDA 스캔의 임상적 의의
김명덕,조보연,이명철,고창순,권인순,박난재,박정식 대한핵의학회 1983 핵의학 분자영상 Vol.17 No.1
Twenty-nine patients with neonatal jaundice were evaluated with Tc-99m-HIDA cholescintigraphy to elucidate its clinical applicability. Scintigraphic results were interpreted by the degree of early hepatic uptake and the presence or absence of radioactivity in the G-I tract. The results are as follows; 1) In 18 patents with neonatal hepatitis; 8 of 11 patients with decreased hepatic uptake and all 5 patients with good hepatic uptake showed G-I radioactivity. But, the 2 remainders with poor hepatic extraction were not available for evaluation of neonatal jaundice due to patients poor hepatic function. 2) In 9 patients, confirmed as biliary obstruction; all showed no G-I radioactivity but 3 of the 9 showed poor hepatic extraction on scan and they were not available for evaluation. 3) All the 2 patients with postoperative cholangitis showed G-I radioactivity on Tc-99m-HIDA scan. 4) Relationship between histopathologic findings and Tc- 99m-HIDA scan; Among 5 patients with biliary cirrhosis 3 showed poor hepatic extraction, the remainders showed decreased and good hepatic uptake respectively. But, the 2 portal fibrosis without cirrhosis and 4 cholestasis showed decreased(4) or good hepatic uptake(2).
올브라이트 유전성 골이영양증 환자에서 발생한 피부골종 1예
정지인,조영훈,서주희,김덕희,정기양 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.4
Albright's hereditary osteodystrophy is an inherited syndrome that encompasses endocrinologic anomaly of pseudohypoparathyroidim of less commonly, pseudo-pseudohypoparathyroidism and various physical stigmata such as mental retardation, short stature, skeletal anomaly of the hands, abnormal dentition, round facies, and osteoma cutis. Primary osteoma cutis in this syndrome presents at birth or in early infancy, preceding most of the other manifestations. This case is a typical presentation with osteoma cutis as the sole initial manifestation. Rather unfamiliar to dermatologists, Albright's hereditary osteodystrophy still deserves to be included in the differentials when an isolated case of osteoma cutis presents in a young child. (Korean J Dermatol 2004;42(4):493~495)