Development of Calculating System of Solids Level to Harvest High Solids Potato (Solanum tuberosum L.)

정재윤,서상곤 한국원예학회 2013 원예과학기술지 Vol.31 No.1

Estimating the high tuber solids needs a simulation system on potato growth, and its development should be obtained by using agricultural elements which analyze the relationship between crop growth and agricultural factors. An accurate simulation to predict solids level against climatic change employs a calculation of in vivo energy consumption and bias for growth and induction shape in a slight environmental adaptation. So, to calculate in vivo energy consumption, this study took a concept of estimate of the amount of basal metabolism in each tuber. In the validation experiments, the results of measuring solid accumulation of potatoes harvested at dates suggested by simulation agreed with the actual measured values in each regional field during the growth period of years from 2006 till 2010. The mean values of tuber solids level and inter-annual level variation in validation experiments were predicted well by the simulation model. And also, the results of validation experiments represent that concentration of tuber solids were due mainly to the duration of sunshine,above 190 hours per a month, and the cumulative amount of radiation, above 2,200 MJ・m-2, of the effective growth period.

효율적 객체 관리 및 부하 분산을 위한 고장포용 객체그룹 프레임워크 설계

정재윤,강명석,김학배 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.1

Wegener’s Granulomatosis Presenting as Bilateral Otalgia with Facial Palsy: A Case Report

정재윤,명나혜 대한청각학회 2013 Journal of Audiology & Otology Vol.17 No.1

Wegener’s granulomatosis (WG) is defined as a granulomatous inflammation of the upper and lower respiratory tract due to a systemic vasculitis. Facial nerve palsy may occur during the course of any granulomatous or vasculitis disease. But very few cases have been reported in which facial nerve palsy is the presenting feature of WG. We recently experienced an interesting case of WG presenting as acute middle ear infection and subsequent bilateral facial palsy.

이석기능검사

정재윤,서명환,이정구 대한평형의학회 2009 Research in Vestibular Science Vol.8 No.2

환축추 불안정성에 대한 환축추 유합술의 방사선학적 분석 - 후방 강선, 경관절 나사, 후방 나사-강봉 고정술의 비교 -

정재윤,서형연,김기형,이건우 대한척추외과학회 2010 대한척추외과학회지 Vol.17 No.4

연구 계획: 후향적 연구목적: 환축추 불안정성에 대하여 후방 강선 고정술, 경관절 나사 고정술, 후방 나사-강봉 고정술을 통한 환축추 유합 위치와 축추하 경추 배열 변화와 재전위의 연관성을 알아보고자 하였다. 선행문헌의 요약: 환축추 유합술에서 환축추 고정위치와 유합술 후 발생하는 축추하 경추 배열 변화와 재전위에 관한 문헌들은 드물다. 대상 및 방법: 1986년부터 2008년까지 환축추 불안정성으로 후방 유합술을 시행하였던 35예를 대상으로 하였고, 평균 추시 기간은 59.5개월이었다. 후방강선 고정술 군 17예, 경관절 나사 고정술 군 10예, 후방 나사-강봉 고정술 군 8예였고, 불안정성의 원인질환은 횡인대 파열 12예, 류마티스 관절염11예, 치상돌기 불유합 6예, Os odontoideum 6예였다. 방사선학적으로 환추-치돌기간 간격과 환추 후궁 및 축추 추궁판각, 인접분절의 정렬 변화 및 유합 시기를 조사하였다. 결과: 전 예에서 골유합은 평균 3.5개월 (3-5개월)에 이루어졌다. 최종 추시상 후방 강선 고정술 군에서는 5예에서 재전위되었고, 축추하 후만 변형은 3예에서 발생했다. 경관절 나사 고정술 군에서는 재전위 및 후만 변형은 없었으며, 후방 나사-강봉 고정술군은 모든 예에서 재전위는 없었고, 1예에서 후만 변형이 발생하였다. 재전위 및 분절간 후만 변형이 일어난 경우는 후궁-추궁판각이 수술 전후로 10도이상 차이나는 군이었으며 통계학적으로 의의가 있었다. 결론: 환축추 불안정성에 대한 수술적 치료 방법에 있어 환축추 유합 위치가 수술 후 축추하 배열 변화에 관련이 있으며, 수술 전 환축추의 전만 유지는수술 후 축추하 배열의 변화를 예방할 수 있을 것이다. Study Design: This is a retrospective study. Objectives: We wanted to clarify the association between the position of the atlantoaxial fusion angle and the change of the subaxial cervical spine alignment (SCA) and the reduction loss after atlantoaxial fusion (AAF) using the posterior wiring technique (PWT),transarticular screw fixation (TAF) and posterior screw-rod fixation (PSR) for treating atlantoaxial instability (AAI). Summary of the Literature Review: There are not many studies on the change of the SCA and the reduction loss after AAF. Material and Methods: Thirty five patients underwent AAF for AAI from 1986 to 2008. The mean follow-up period was 59.5 months. The surgical techniques were divided into three groups, that is, PWT: 17 patients, TAS: 10 and PSR: 8. The causes of instability were transverse ligament rupture in 12 patients, rheumatoid arthritis in 11, Os odontoideum in 6 and nonunion of an odontoid fracture in 6. Plain radiographs were used to assess the atlanto-dental interval, the posterior arch-lamina angle, the change of the SCA and the time of fusion. Results: Fusion was achieved in all the patients within 3.5 months (range: 3-5 months). The radiologic findings in the 5 PWT patients showed a reduction loss and 3 patients showed subaxial cervical kyphosis (SCK). The TAS group had no reduction loss or SCK. The PSR group had no reduction loss and one patient showed SCK. A statistically significant reduction loss and SCK occurred in the group in which there was a posterior arch-laminar angle greater than 10 degrees before and after surgery. Conclusions: For the treatment of AAI, the position of the AAF is associated with the change of the postoperative SCA. The preoperative lodortic position of C1-2 should be maintained to prevent the change of the SCA

잠김 금속판을 이용한 불안정성 상완골 근위부 골절의 치료

정재윤,문은선,김명선,박경순,이근배 대한골절학회 2006 대한골절학회지 Vol.19 No.2

경추 전방 유합술에서 Harms 케이지와 장골 블록 이식술의 임상적, 방사선학적 결과 비교

정재윤,임지현,서형연,김성규,이승훈 대한척추외과학회 2011 대한척추외과학회지 Vol.18 No.4

Study Design: A retrospective study. Objectives: To evaluate the clinical and radiological outcomes of anterior cervical fusion within Harms cage versus an iliac bone block graft. Summary of Literature Review: There is no current consensus regarding the optimal material for anterior cervical fusion. Materials and Methods: This was a single-center study of 107 patients who either underwent anterior cervical fusion with an iliac bone block graft (n=56; group A) or a cancellous bone graft within the cervical Harms titanium cage (n=51; group B). Anterior plating occurred in all cases. Clinical outcomes and complications were evaluated using Visual Analogue Scale (VAS) scores and Odom’s Criteria. Radiological outcomes were evaluated by the height of vertebral bodies, sagittal lordosis, the rate of bony union, and the subsidence of cage. Results: The VAS of donor site pain was significantly higher in group A than in group B at the final follow-up. Sagittal lordosis was increased in both groups, but was significantly higher in group B than group A. The rate of bony union was 95% and 91% for both groups 6 months after surgery and reached 100% for both groups at the final follow-up. In terms of cage subsidence, the highest point of subsidence was at the inferior and posterior aspect of the cage and the average amount of subsidence was approximately 1.3 mm at final follow-up. Conclusions: Anterior cervical fusion using a cancellous bone graft within Harms titanium cage is a good method for anterior cervical fusion with iliac bone block. 연구 계획: 후향적 연구목적: 경추 전방 추체 간 유합술에서 Harms 티타늄 케이지 내 자가 해면골 이식술과 장골 블록 자가 삼면 피질골 이식술의 임상적, 방사선학적 결과를비교 분석하고자 하였다. 선행문헌의 요약: 경추 전방 추체 간 유합술에서 유합물에 대한 최선의 대체재에 대해서 아직까지 확립되지 않았다. 대상 및 방법: 경추 전방 추체 간 유합술을 시행한 107명의 환자에 대하여, 장골 블록 자가 삼면 피질골 이식술을 받은 56명을 A군으로, 경추용 Harms 티타늄 케이지 내 자가 해면골 이식술을 받은 51명은 B군으로 구분하였다. 양 군에서 모두 금속판 고정술을 동반 시행하였다. 임상적 평가는 경추부 및상지, 골이식 공여부위에 대한 통증과 합병증의 평가 지표로 Visual Analogue Scale(VAS)과 Odom의 기준을 사용하였다. 방사선적으로는 수술 분절의높이 변화와 시상면 전만각, 골유합률을 측정하였고, 추가적으로 B군에서 케이지의 침강 정도를 측정하였다. 결과: 공여부 통증 지표로서 VAS 점수는 A군에서 최종 추시 상 B군에 비하여 유의하게 높았다. 수술 분절 시상면 전만각의 변화는 단 분절과 두 분절에서 모두 유의하게 B군이 A군보다 높은 증가를 보였다. 골유합률은 두 군에서 수술 후 6 개월에 각각 95 %와 91 %였고, 최종 추시 상 양 군의 전 예에서골유합을 보였다. B군의 Harms 티타늄 케이지의 침강은 주로 후하방에서 발생하였으며, 최종 추시에서 후하방의 침강 정도는 평균 1.3 mm로 측정되었다. 결론: Harms 티타늄 케이지 내 자가 해면골 이식술 및 금속판 고정술은 만족할 만한 임상적, 방사선적 결과를 보였으며, 장골 블록 자가골 이식술을 대체할 수 있는 방법으로 사료된다.

전정유모세포 재생

정재윤 대한평형의학회 2011 Research in Vestibular Science Vol.10 No.-

Effects of statin use on the response duration to androgen deprivation therapy in metastatic prostate cancer

정재윤,이천우,이찬우,권택민,유달산,정인갑,홍준혁,안한종,김청수 대한비뇨의학회 2015 Investigative and Clinical Urology Vol.56 No.9

Purpose: To determine whether statin use delays the development of castration-resistant prostate cancer (CRPC) in patients with metastatic prostate cancer treated with androgen deprivation therapy (ADT). Materials and Methods: A total of 171 patients with metastatic prostate cancer at the time of diagnosis who were treated with ADT between January 1997 and December 2013 were retrospectively analyzed. The patients were classified into two groups: the nonstatin use group (A group) and the statin use group (B group). Multivariate analysis was performed on statin use and other factors considered likely to have an effect on the time to progression to CRPC. Results: The mean patient age was 67.1±9.1 years, and the mean follow-up period was 52 months. The mean initial prostate-specific antigen (PSA) level was 537 ng/mL. Of the 171 patients, 125 (73%) were in group A and 46 (27%) were in group B. The time to progression to CRPC was 22.7 months in group A and 30.5 months in group B, and this difference was significant (p=0.032). Blood cholesterol and initial PSA levels did not differ significantly according to the time to progression to CRPC (p=0.288, p=0.198). Multivariate analysis using the Cox regression method showed that not having diabetes (p=0.037) and using a statin (p=0.045) significantly increased the odds ratio of a longer progression to CRPC. Conclusions: Statin use in metastatic prostate cancer patients appears to delay the progression to CRPC. Large-scale, long-term follow-up studies are needed to validate this finding.

웹 서비스 규칙 언어의 프로세스 패턴 분석

정재윤 대한산업공학회 2008 대한산업공학회 추계학술대회논문집 Vol.2008 No.11

Rule-based process modeling is often used in designing business processes with complex business rules or distributed processes such as ubiquitous environments. This paper introduced a methodology of designing ECA rule-based process modeling and analyzed the modeling based on workflow patterns, which were usually utilized to analyze expressive powers of business process modeling methods and languages. As rapid event monitoring and processing are becoming more emphasized, rule-based process modeling will be effectively adopted for real-time enterprises.