뚜렛 증후군을 가진 15세 소아에서 발생한 양측성 망막박리

권순재,이진영,신재필,Soon Jae Kwon,Jin Young Lee,Jae Pil Shin 대한안과학회 2012 대한안과학회지 Vol.53 No.11

Purpose: To report a case of bilateral retinal detachment in a 15-year-old child with Tourette syndrome. Case summary: A 15-year-old child treated for Tourette syndrome for 4 years presented with decreased visual acuity of several days in duration. The fundus of the right eye was not observed due to lens opacity and posterior synechiae. The B-scan of the right eye showed funnel-shaped densely reflective echoes connected to the optic disc, suggesting a total retinal detachment. Fundus examination of the left eye revealed an inverted retinal flap, which covered the posterior pole. During vitrectomy of the left eye, a ciliary body detachment anterior to a giant retinal tear extending 360 degrees was observed. In addition, an inverted flap covering 2 superior retinal quadrants was observed. A perfluorocarbon liquid was injected to unfold the tear’s inverted flap, and silicone oil tamponade was performed. Conclusions: Self-induced and repeated periocular trauma induced by motor tics of Tourette syndrome can result in bilateral retinal detachment. Regular ophthalmic examinations are helpful for early detection of ocular complications including periocular trauma induced by motor tics of Tourette syndrome.

외상후스트레스장애 환자에 대한 음악요법의 적용 일례

권순재,양종철,박태원,정영철,정상근,Kwon, Soon-Jae,Yang, Jong-Chul,Park, Tae-Won,Chung, Young-Chul,Chung, Sang-Keun 대한불안의학회 2012 대한불안의학회지 Vol.8 No.1

Music therapy had been widely used in the area of psychiatry. However recently, participation of psychiatrist has been decreased, due to recent trends of emphasizing biological psychiatry and rapid effectiveness of pharmacotherapy. A 46 years old male PTSD patient was admitted to psychiatric ward. He has suffered from PTSD symptoms, such as intrusive distressing recollection of his past traffic accident, social avoidance, insomnia and depression. Music therapy, which is conducted by a psychiatrist and a music therapist, was applied. This case suggests the positive role of music therapy in treatment of PTSD and emphasizes the importance of participation of psychiatrist, as an organizer during music therapy.

당뇨황반부종에 대한 트리암시놀론의 유리체강내 주입술과 테논낭하 주입술의 비교

권순재,신재필,김시열.Soon Jae Kwon. M.D.. Jae Pil Shin. M.D.. Si Yeol Kim. M.D. 대한안과학회 2008 대한안과학회지 Vol.49 No.1

`Purpose: To retrospectively evaluate the clinical effect of intravitreal (IVT) and posterior subtenon (PSTT) triamcinolone acetonide (TA) injection in diabetic macular edema. Methods: Fifty eyes of 43 patients with diabetic macular edema (DME) were included. Twenty-two eyes in the IVT group received 4 mg/0.1 ml intravitreal TA injections and 26 eyes in the PSTT group received 40 mg/1.0 ml subtenon TA injections. LogMAR visual acuity and intraocular pressure (IOP) were measured and, using OCT, central macular thickness (CMT) and total macular volume (TMV) were also measured before and 1, 3, and 6 months postoperatively. Results: Both groups showed significant decreases in the mean CMT and TMV. The mean CMT in the IVT group was significantly thinner than that of the PSTT group 1 month postoperatively. The percentage reduction in CMT and TMV were also greater in the IVT group than the PSTT group 1 month postoperatively. Both groups showed significant improvements in mean visual acuity, with no significant difference between the two groups. However, at 1-month postoperative improvement in visual acuity was significantly greater in the IVT group than the PSTT group. The mean IOP in the IVT group was also greater than that in the PSTT 1 month postoperatively. Conclusions: Both injections caused a significant increase in visual acuity and a decrease in CMT and TMV. The effect was more pronounced in the IVT group. However, the PSTT injection also appeared to be a safe and effective technique for the treatment of DME.`

3상 PWM 콘버어터에 의한 정지형 무효전력 보상장치의 동작특성(Ⅱ)

권순재(Kwon Soon Jae),김광태(Kim Kwang Tae),황영문(Whang yong Moon),김철우(Kim Cheul U) 대한전기학회 1988 대한전기학회 학술대회 논문집 Vol.1988 No.11

초고추장첨가 멸치( Engraulis japonica )육젓필레통조림의 제조 및 특성

권순재 ( Soon Jae Kwon ),윤문주 ( Moon Joo Yoon ),이재동 ( Jae Dong Lee ),강경훈 ( Kyung Hun Kang ),공청식 ( Cheung Sik Kong ),제해수 ( Hae Soo Je ),정제헌 ( Jae Hun Jung ),김정균 ( Jeong Gyun Kim ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6

A traditional Korean seafood (fermented anchovy) is made from the muscle and viscera of anchovies Engraulis japonica . This study was undertaken to investigate the effect of retorting condition on the quality of canned, saltfermented anchovy fillet using red pepper paste with vinegar. Salt-fermented anchovy fillets were prepared by fermenting anchovies with salt (15%) at 5°C for 15 days, and then cold air drying the fillets for 1 hour. Each batch of dried fermented anchovy fillets (60 g) was filled with 35 g of mixed red pepper paste with vinegar (red pepper paste 64%, vinegar 2%, starch syrup 13%, sugar 14%, coke 6%, soju 0.4%, crushed garlic 0.3%, ginger 0.3%), placed in a can (RR-90, seamed using a vacuum seamer, and sterilized for either Fo 9 or 11 min in a steam system retort at 121°C. After sterilization, we measured the pH, total volatile basic nitrogen (TVB-N), amino-N, color value (L, a, b), texture profile, thiobarbituric acid (TBA) value, sensory evaluation, and viable bacterial count of the canned fillets. We did not detect viable bacterial counts in cans subjected to either sterilization treatment, and there was no difference in physicochemical and sensory quality between the two. In fact, most sensory evaluators reported difficulty distinguishing the products. Thus, our results show that sterilization for Fo 9 min is preferable to that for Fo 11 min in the preparation of canned salt-fermented anchovy fillet using red pepper paste with vinegar.

모바일 앱에 대한 사용자의 지각된 서비스 품질 결정 모델

권순재(Kwon, Sun-Jae),박상철(Park, Sang Cheol) 한국물류학회 2015 물류학회지 Vol.25 No.5

최근의 모바일 앱 스토어의 급속한 성장은 모바일 콘텐츠 시장의 새로운 기회라 할 수 있다. 이러한 환경에서 사업자 관점의 성공요인은 제시되고 있는 반면, 사용자 측면의 성공요인에 대한 연구는 상대적으로 소홀한 것이 사실이다. 이에 본 연구에서는 모바일 앱 서비스 품질 결정요인을 탐색하고, 사용자 만족과 충성도를 연계하여 실증 분석하였다. 특히 사용자 만족이 모바일 앱 서비스 품질 결정요인들과 충성도간의 관계에서 어떻게 매개적 역할을 하는지를 파악하기 위해, 매개적 가설을 구성하고, Baron and Kenny(1986)의 연구, Preacher and Hayes(2008) 연구, 그리고 Zhao et al.(2010) 연구에서 활용된 매개분석방법을 차용하여 가설을 검증하였다. 실증분석을 위해, 모바일 앱 스토어 이용경험이 있는 140명의 사용자들을 대상으로 설문을 수집하였으며, 각 선행연구에서 제 시한 방법을 단계적으로 활용하여 가설을 검증하였으며, 사용자 만족의 매개적 역할을 밝혀내었다. 실증분석 결과, 앱 스토어 디자인품질, 앱 콘텐츠 품질, 앱 시스템 품질은 사용자 만족에 영향을 미치며, 사용자 만족은 충성도에 유의한 영향이 있음을 밝혀내었다. 또한 사용자 만족은 품질결정요인들과 충성도간의 관계에서 각각 부분매개 또는 완전매개 하는 것으로 나타났다. 본 연구의 실증 분석결과를 토대로 모바일 앱 서비스와 관련한 학술적, 실무적 시사점을 제시하고 있다. Recently, mobile app-store have revolutionized the existing mobile content industry. Although the benefits of using mobile app-store, there has been little empirical work in this area from the users’ standpoint. Drawing on IS (information systems) success model, this study develops and tests a model of the users’ loyalty in mobile applications settings. Our model posits that certain antecedents such as content quality, system quality and design quality affect the satisfaction which, in turn, influence the loyalty. Survey data collected from 140 mobile users were used to test our research model using a variety of mediated regression techniques such as Baron and Kenny(1986), Preacher and Hayes(2008) and Zhao et al.(2010). Our empirical findings indicate that design quality, app-content quality and system quality significantly affect user satisfaction, which in turn, user loyalty of mobile app-store. Furthermore, our empirical results from various mediation tests shows that user satisfaction partially or fully mediates the relationships between mobile app-quality drivers and user loyalty. The implications of these findings for both research and practice are discussed.

압저항 연성해석을 통한 고충격 미소가속도계의 최적설계 및 성능 비교

권순재(Soon Jae Kwon),한정삼(Jeong Sam Han) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10

In order to detect a high impact that occurs at earth-penetration weapons, piezoresistive micro accelerometers are generally used because of its structural sturdiness. In this paper, structural optimization for piezoresistive micro accelerations was introduced to improve its performances from initial designs. In the optimization formulations, the following sensor performances are considered; maximum stress level, resonant frequencies, and sensor sensitivity calculated by piezoresistive-structural coupled-field analysis. We adopted two reference models: (1) a piezoresistive type silicon micromachined high-shock accelerometer with a bonded hinge structure and (2) a silicon micromachined shock accelerometer with twin-mass-plate structure. Several optimization with different formulations are performed for the examples and their optimum results are compared and discussed.

모바일 휴대용 단말기의 지속적 이용에 있어서 기기애착 개념의 역할에 관한 연구

권순재 ( Soon Jae Kwon ),채성욱 ( Sung Uk Chae ) 한국정보시스템학회 2009 情報시스템硏究 Vol.18 No.3

초고추장첨가 과메기통조림의 제조 및 특성

권순재 ( Soon Jae Kwon ),박태호 ( Tae Ho Park ),이재동 ( Jae Dong Lee ),윤문주 ( Moon Joo Yoon ),공청식 ( Cheung Sik Kong ),제해수 ( Hae Soo Je ),정제헌 ( Jae Hun Jung ),김정균 ( Jeong Gyun Kim ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5

Kwamaegi is a traditional Korean seafood made from the flesh of Pacific saury Cololabis saira. It is recognized as a valuable, healthy food containing the ω-3 fatty acids EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). This study was conducted in order to obtain basic data for application to the canning process of Kwamaegi using red pepper paste with vinegar. Commercial Kwamaegi was cut into 2×3 cm lengths and 90 g was put into cans (301-3). Then, 60 g of water was added and precooked for 10 minutes at 100℃. The water was drained after precooking. The precooked Kwamaegi was packed into cans, and 60 g of red pepper paste with vinegar was added. The cans were seamed using a vacuum seamer, then sterilized for differing times (8-12 minutes) in a steam system retort at 121℃. Parameters such as: pH, TVB-N, amino-N, total amino acid content, free amino acid content, color value (L, a, b), texture profile, TBA value, mineral content, sensory evaluation and viable bacterial count of the product produced under varying sterilization times (8-12 minutes) were measured. There were no remarkable differences between ster-ilization conditions and textural characteristics. The results showed that product sterilized for 8 minutes proved to be the most desirable.

지각된 가치와 지각된 즐거움과 모바일 디바이스의 지속적인 사용

권순재 ( Soon Jae Kwon ) 한국정보시스템학회 2015 情報시스템硏究 Vol.24 No.1

본 연구에서는 사용자와 정보시스템간(예: 모바일디바이스)의 애착동기(attachment)를 살펴보고 자 하였는데, 특히 사용자경험(user``s experience)의 조절효과(moderating effect)를 중심으로 분석을 실시하였다. 240명의 대학생을 대상으로 지각된가치(perceived value), 지각된즐거움(perceived enjoyment), 애착동기(attachment)의 요인들이 모바일디바이스의 지속적인 사용(continuos usage)과의 매개변수(mediating variable)의 관계를 분석하였다. 이와 경주하여, 사용자의 과거경험(user``s past experience)이 모바일디바이스의 지속적인 사용과의 관계에서 조절효과(moderating effect)를 가지는지를 분석하였다. 그 결과 애착동기(attachment)는 지각된즐거움(perceived enjoyment)과 지각된 가치(perceived value)에서 지속적인 사용(continuos usage)에 매개변수(mediating variable)로서의 위치를 검증하였다. 또한, 지각된즐거움(perceived enjoyment)과 지속적인 사용(continuos usage)에 조절효과를 가지는 것으로 분석되었지만, 지각된가치(perceived value)에서는 조절효과가 미비한 것으로 분석되었다. The concept of attachment between users and Information Systems; specifically on mobile devices was examined in this study. Furthermore, the moderating effect of users’ past experience also was investigated. The empirical study was done involving 240 university students; to investigate the participants’ perceived value, perceived enjoyment, attachment and also continuous usage of mobile devices. Additionally, participants’ past experience was also enquired to examine its moderating effects. The results show that attachment is mediating both perceived value and perceived enjoyment with continuous usage. Meanwhile, past experience negatively moderates perceived enjoyment with attachment and also negatively moderates attachment with continuous usage.