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NOAA AVHRR 자료를 이용한 해수면온도 산출에 황사가 미치는 영향
전형욱 ( Hyoung Wook Chun ),손병주 ( Byung Ju Sohn ) 大韓遠隔探査學會 2009 大韓遠隔探査學會誌 Vol.25 No.1
본 연구에서는 NOAA AVHRR 밝기온도 자료로부터 해수면 온도 (SST) 산출에 황사 에어로솔이 미치는 영향을 복사전달 모델을 사용하여 분석하고, SST 복원 알고리즘을 개선하였다. 봄철의 황사에 의한 AVHRR 밝기온도 변화를 모의하기 위한 복사전달 모델의 입력 자료로서 지상 태양광 관측 자료로부터 분석한 황사 에어로솔 광학적 특성 (에어로솔 광학적 두께 및 크기분포)과 라디오 존데 연직분포 자료(기압, 기온, 및 습도)를 이용하였다. 황사 에어로솔은 적외선 복사대에서 흡수에 비해 산란이 매우 큼을 보였으며, 이러한 특징은 지표면에서 방출되는 상향복사량을 산란시켜 대기상부에서 관측되는 밝기온도를 감소시키는 경향과 관련이 있다. 광학적 두께가 1인 황사의 경우 직하점에서 약 2K, 위성 천정각이 50°인 경우에는 약 4 K의 감쇄를 유발하였다. 황사 존재시 AVHRR 적외채널 11, 12 μm의 밝기온도 차 역시 감소하는 경향을 보이고 있지만 그 값은 미미하였다. 기존 SST 복원 알고리즘은 황사발생시 SST를 실제 값보다도 낮게 산출함을 보였으며, 이를 보정하기 위해 에어로솔 광학적 두께, 11 μm에서의 밝기온도 그리고 위성 천정각을 추가하여 알고리즘을 개선하였다. 개선된 SST 복원 알고리즘은 황사의 두께가 1인 경우 2.7 K정도의 오차를 개선하였다. This research presents the effect of Asian dust on the derived sea surface temperature (SST) from measurements of the Advanced Very High Resolution Radiometer (AVHRR) instrument flown onboard NOAA polar orbiting satellites. To analyze the effect, AVHRR infrared brightness temperature (TB) is estimated from simulated radiance calculated from radiative transfer model on various atmospheric conditions. Vertical profiles of temperature, pressure, and humidity from radiosonde observation are used to build up the East Asian atmospheric conditions in spring. Aerosol optical thickness (AOT) and size distribution are derived from skyradiation measurements to be used as inputs to the radiative transfer model. The simulation results show that single channel TB at window region is depressed under the Asian dust condition. The magnitude of depression is about 2K at nadir under moderate aerosol loading, but the magnitude reaches up to 4K at slant path. The dual channel difference (DCD) in spilt window region is also reduced under the Asian dust condition, but the reduction of DCD is much smaller than that shown in single channel TB simulation. Owing to the depression of TB, SST has cold bias. In addition, the effect of AOT on SST is amplified at large satellite zenith angle (SZA), resulting in high variance in derived SSTs. The SST depression due to the presence of Asian dust can be expressed as a linear function of AOT and SZA. On the basis of this relationship, the effect of Asian dust on the SST retrieval from the conventional daytime multi-channel SST algorithm can be derived as a function of AOT and SZA.
체간 안정화운동이 정상성인의 균형, 폐활량, 근활성도에 미치는 영향
남형천 ( Hyoung Chun Nam ),조윤진 ( Yoon Jin Jo ),강병주 ( Byeong Joo Kang ),김슬비 ( Seul Bi Kim ),안욱주 ( Wook Joo An ),이화주 ( Hwa Joo Lee ),정수진 ( Su Jin Jeong ) 대한통합의학회 2015 대한통합의학회지 Vol.3 No.4
Purpose : This study examines the effect of trunk stabilization program on the body balance, lung capacity, and muscular activity of the rectus abdominis and external oblique of healthy adults. Method : A survey was conducted for 20 students of K University located in the city of Y in Gyeongsangbuk-do Province of Korea. The trunk stabilization program consisted of a hollowing exercise, curl-up, bridging exercise, and birddog exercise. This was performed 14 times in total (7 times a week for two weeks). For analysis, good balance was used to measure both static and dynamic balancing ability. A peak flow meter was used to measure the maximum expiratory flow, and MP150 was used to measure muscular activity of the rectus abdominis and external oblique. Result : After the trunk stabilization program, the participants showed a difference in score and time taken to achieve static and dynamic balance, and muscular activity of the rectus abdominis and external oblique at a statistically significant level (p<0.05). However, no significant difference was observed in the left-to-right distance and front-to-back distance in a dynamic balance, and the lung capacity (p>0.05). Conclusion : The results showed that the trunk stabilization program was effective in enhancing both static and dynamic balancing ability and muscular activity. It also increased the lung capacity although the change was not at a statistically significant level.
Dae Hyoung Park,Jong Bouk Lee,Chun Ha Hwang,Jong Hyun Yoon,Jung Hyun Jo,Tae Wook Jeong,Woong Na 대한노인병학회 2019 Annals of geriatric medicine and research Vol.23 No.3
Background: Three-quarters of aged men experience lower urinary tract symptoms with benign prostate hypertrophy (BPH). Transurethral resection of the prostate (TURP) and holmium laser enucleation of the prostate (HoLEP) are standard endosurgical procedures in patients with BPH. Previous studies reported better results in patients undergoing HoLEP than in those undergoing TURP. Methods: This study compared the efficiency and safety of conventional morcellation and morcellation performed after X-incision during enucleation, a newly added technique in HoLEP. Overall, 174 patients were selected as the final study population. Results: The populations were stratified with respect to resected volumes. A t-test were used to compare the conventional morcellation and X-incision procedure groups. Results: In morcellation times and rates, there were significant differences in stratified resected mass (g) between the groups. Conclusion: We believe morcellation performed after X-incision procedure during enucleation is efficient and safe for older adults with BPH.
Association of ZDHHC8 polymorphisms with smooth pursuit eye movement abnormality
Shin, Hyoung Doo,Park, Byung Lae,Bae, Joon Seol,Park, Tae Joon,Chun, Ji Yong,Park, Chul Soo,Sohn, Jin-Wook,Kim, Bong-Jo,Kang, Yeo-Hwa,Kim, Jae Won,Kim, Ki-Hoon,Shin, Tae-Min,Woo, Sung-Il Wiley Subscription Services, Inc., A Wiley Company 2010 American Journal of Medical Genetics. Part B Vol.b153 No.6
<P>The zinc finger DHHC domain-containing protein 8 (ZDHHC8) is located in the 22q11 microdeletion region and may contribute to the behavioral deficit associated with 22q11 deletion syndrome. Although polymorphisms of ZDHHC8 have been reported to be associated with the risk of schizophrenia, those associations are still controversial. This study was performed to validate the genetic association of ZDHHC8 polymorphisms with the risk of schizophrenia, and also to scrutinize the association with smooth pursuit eye movement (SPEM) abnormality in a Korean population. Five SNPs of ZDHHC8 were genotyped by TaqMan assay. Their genetic effects on the risk of schizophrenia were analyzed in 354 patients and 396 controls using allele-based χ<SUP>2</SUP> analyses. Association of ZDHHC8 polymorphisms with SPEM abnormality among 166 schizophrenic patients were analyzed using multiple regressions. No ZDHHC8 polymorphisms were found to be associated with the risk of schizophrenia. However, four SNPs and one haplotype (ht4) were strongly associated with the risk of SPEM abnormality even after multiple correction (P = 0.00005–0.0007, P<SUP>corr</SUP> = 0.0001–0.002). The results of the present study provide the first evidence that ZDHHC8 on the 22q11 locus might have influence on SPEM function of schizophrenia patients in a Korean population and may provide a new clue for understanding differential effects of candidate genes in schizophrenia. © 2010 Wiley-Liss, Inc.</P>
The Analysis of Risk Factors in No Thumb Test in Total Knee Arthroplasty
Jee Hyoung Kim,Song Lee,Dong Oh Ko,Chang Wook Yoo,Tae Hwan Chun,Jung Soo Lee 대한정형외과학회 2011 Clinics in Orthopedic Surgery Vol.3 No.4
Background: We would like to analyze the risk factors of no thumb test among knee alignment tests during total knee arthroplastysurgery. Methods: The 156 cases of total knee arthroplasty by an operator from October 2009 to April 2010 were analyzed according topreoperative indicators including body weight, height, degree of varus deformity, and patella subluxation and surgical indicatorssuch as pre-osteotomy patella thickness, degree of patella degeneration, no thumb test which was evaluated after medial prepatellaincision and before bone resection (1st test), no thumb test which was evaluated with corrective valgus stress (2nd test, Jtest), and the kind of prosthesis. We comparatively analyzed indicators affecting no thumb test (3rd test). Results: There was no relation between age, sex, and body weight and no thumb test (3rd test). Patellar sulcus angle (p = 0.795),patellar congruence angle (p = 0.276) and preoperative mechanical axis showed no relationship. The 1st no thumb test (p = 0.007)and 2nd test (p = 0.002) showed signifi cant relation with the 3rd no thumb test. Among surgical indicators, pre-osteotomy patellathickness (p = 0.275) and degeneration of patella (p = 0.320) were not relevant but post-osteotomy patellar thickness (p = 0.002)was relevant to no thumb test (3rd test). According to prosthesis, there was no signifi cance with Nexgen (p = 0.575). However,there was signifi cant correlation between Scorpio (p = 0.011), Vanguard (p = 0.049) and no thumb test (3rd test). Especially, Scorpiohad a tendency to dislocate the patella, but Vanguard to stabilize the patella. Conclusions: No thumb test (3rd test) is correlated positively with 1st test, 2nd test, and post-osteotomy patella thickness. Therefore, the more patella osteotomy and the prosthesis with high affi nity to patellofemoral alignment would be required for correctpatella alignment.