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Jin‑Kyung Jeon,Hyunseon Seo,Jimin Park,Soo Ji Son,Yeong Rim Kim,Eun Shil Kim,Jong Woong Park,Woong‑Gyo Jung,Hojeong Jeon,Yu‑Chan Kim,Hyun‑Kwang Seok,Jae Ho Shin,Myoung‑Ryul Ok 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4
The excessive initial corrosion rate of Mg is a critical limitation in the clinical application of biodegradable Mg implantsbecause the device loses its fi xation strength before the fractured bone heals. This study suggests a new approach to overcomethis hurdle by accelerating tissue regeneration instead of delaying the implant biodegradation. As angiogenesis is anessential process in early bone regeneration, a Mg implant coated with electrospun nanofi bers containing nitric oxide (NO),which physiologically promotes angiogenesis, is designed. The integrated device enables adjustable amounts of NO to bestored on the NO donor-conjugated nanofi ber coating, stably delivered, and released to the fractured bone tissue near theimplanted sites. An in vitro corrosion test reveals no adverse eff ect of the released NO on the corrosion behavior of the Mgimplant. Simultaneously, the optimal concentration level of NO released from the implant signifi cantly enhances tube networkformation of human umbilical vein endothelial cells without any cytotoxicity problem. This indicates that angiogenesis canbe accelerated by combining NO-releasing nanofi bers with a Mg implant. With its proven feasibility, the proposed approachcould be a novel solution for the initial stability problem of biodegradable Mg implants, leading to successful bone fi xation.
박재진,이정교 한국방송광고공사 2006 광고연구 Vol.0 No.73
소비자들의 구매의사결정에 브랜드 또는 제품의 이미지가 지대한 영향을 미친다는 사실은 누구나 인지하고 있는 바이다. 오프라인 기업이나 브랜드, 상점 등의 이미지를 평가하기 위한 지수개발은 지속적으로 행해져 왔으나, 전자상거래가 급성장하고 있는 현 시점에서 온라인 브랜드나 기업의 이미지를 측정하기 위한 지수개발 연구는 미비한 실정이다. 이러한 점을 염두에 두고, 본 연구는 온라인 쇼핑몰에 대한 총체적 이미지를 구성하는 다양한 차원(핵심요인)들을 밝혀내고 이를 측정하기 위한 통계적으로 신뢰성 및 타당성이 높은 지수를 개발하는데 있다. 관련 분야의 이론적 고찰 및 문항추출, 서베이, 신뢰성 및 타당성 검증 등의 절차를 거쳐 본 연구는 온라인 쇼핑몰 이미지를 측정하기 위한 29문항으로 구성된 다음과 같은 7개의 요인을 추출하였다: 고객서비스, 신뢰성, 사용용이성, 제품정보, 유용성, 보안, 거래변경 용이성. 본 연구결과와 관련하여 학술적 및 실무적 시사점 등이 논의되어졌다. With the exponential growth of online shopping industry, a valid instrument measuring an online shopping mall’s image is essential for marketers and advertisers. This study examines consumers’ perceptions of the image of online shopping mall. Following traditional methods of scale development, a scale is developed to tap an underlying dimension of online shopping mall image. Psychometric scale-development procedures were followed that rigorously tested a large pool of items for their reliability and validity. Evidence is presented attesting to the scale’s dimensionality, reliability, and validity. The importance of such a scale for the field of marketing is discussed.
한진욱,이응숙,정윤교 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-
Micro drilling is one of the most important machining types and its importance becomes more and more increased in the whole field of industry. Micro drilling, however, has few the case of practical application, because it requests high techniques; manufacturing micro drill, treating, chip, producing precise hole shape and progressing machining efficiency. Micro drilling has a technical problem; drill breakage from drill breakage from the lack of drill stiffness and the interruption of chip. It is, therefore, essential to select of proper cutting conditions and of step fed for the method solving the lack of stiffness and the interruption of chip. Especially, study on step feed is requested more than the present. The purpose of this paper is to investigate experimentally about cutting conditions which affect on tool life and round errors and to estimate about the efficiency of step feed.
정인원,박환규,정연복,김수일,원구연,김교형,신철진 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6
연구목적: 정신보건법에 근거하여 매월 정기적으로 개최된 충청북도 정신보건심판위원회를 통하여 정신질환자의 계속입원치료 청구 심사의 현황과 문제점을 파악하고 개선사항을 지적함으로써 정신질환자의 효율적인 관리를 유도하고 인권남용의 여지를 차단하고자 한다. 방 법: 충청북도 내의 정신의료기관에서 계속입원치료 심사청구서 및 진단서, 보호의무자의 동의서 등을 제출한 정신질환자들을 대상으로 계속입원치료 청구에 대한 승인 여부를 매달 정기적으로 심사하였다. 1년 6개월여동안 심사한 자료를 정리하여 진단 및 보호의무자, 의료보장별 특성과 불승인률 등을 분석하였다. 결 과: 충청북도 심판위원회에 계속입원치료를 청구한 정신질환자는 21차례의 위원회 동안 총 7,981명이었으며, 진단별로 정신분열병은 80.9%, 알콜중독은 8.1%, 치매 등 기타는 11.0%이었다. 또한 보호의무자는 시장 또는 군수가 29.8%, 부모가 26.9%, 형제가 26.1%, 부부가 6.3%, 자녀가 5.9%, 기타가 5.0%로 나타났으며, 의료보장은 의료보호가 73.0%, 의료보험이 27.0%이었다. 이들 중에서 196명이 계속입원치료를 불승인받아서 전체 불승인률은 2.46%이었으며 정신분열병과 알콜중독 환자의 진단별 불승인률은 각각 0.73%와 17.6%이었다. 결 론: 정신과 병상의 대부분이 장기적으로 입원하는 만성 정신질환자들로 구성되어 있어서 이들에 대한 별도의 대책이 시급하다. 또한 계속입원치료가 불승인되어 퇴원한 환자들의 재활 및 사회적응을 위한 사회적 지지 체계가 부족하며, 특히 환자의 인권보호를 위한 구체적인 기준 등이 필요하다. Objectives: This study was to develop effective managements and to avoid the abuse of human rights in mentally-ill patients. The Mental Health Judgement Board of Chungchongbuk-do province has been held monthly since August, 1997 according to the Mental Health Act. In this study, the procedures and the problems of judging continuing hospitalization of chronic mentally-ill patients were reviewed. Methods: The mentally-ill patients who submitted the request for continuing hospitalization with the certificate of charged doctor and the agreement of caregiver were reviewed by the Mental Health Judgement Board of Chungchongbuk-do province. The analysis of the diagnoses, caregivers, medical care systems, and rejection rate for the patients were done. Results: Total mumber of mentally-ill patients who requested for continuing hospitalization were 7,981 from twenty-one monthly meetings. The diagnostic distributions were 80.9% for schizophrenic patients, 8.1% for alcoholics and 11.0% for others including dementia. As for the caretakers, the rate of majors was 29.8%, parents 26.9%, sibling 26.1%, spouse 6.3%, offspring 5.9%, and others 5.0%. And 73.0% of the patients were on Medicaid and 27.0% were insured. The patients who got the rejection for continuing hospitalization were 196 at the rate of 2.46%. And the rejection rates of schIzophrenic and alcoholic patients were 0.73% and 17.6%, respectively. Conclusions: New policies for decreasing longterm hospitalization of chronic mentally-ill patients are required. And the social support systems for psychiatric rehabilitation and readjustment are presently insufficient for the already discharged mentally-ill. Moreover, the practical guidelines for human rights of patients remains to be suggested.
양승부,최교창,이상진,정영진,임한혁,한효상,황인철,조환성 순천향의학연구소 2005 Journal of Soonchunhyang Medical Science Vol.11 No.1
Objective : Our purpose of this study is to evaluate the effectiveness of the transcatheter arterial embolization for the management of abnormal uterine bleeding. Materials and Methods : 14 patients with massive or recurrent uterine bleeding underwent percutaneous transcatheter arterial embolization between February 2003 and September 2004. We reviewed 14 cases of uterine artery or internal iliac artery embolization using gelfoam or PVA particles. Results : Good management of uterine bleeding was achieved in 13 of 14(93%) cases. The cause of abnormal uterine bleeding was myoma(5 case), post D & E bleeding(3), acquired vascular malformation(3), pseudoaneurysm(1), adenomyosis(1), and endometrial hyperplasia(1). Conclusion : Transcatheter artery embolization is an effective and life-saving procedure in massive or recurrent uterine bleeding. Early diagnosis and prompt transcatheter arterial embolization is a useful mangement of uterine bleeding.
Crystallographic and magnetic properties of α-NaFeO2 using Mössbauer spectroscopy
Jung Jin Gyo,Baik Jae Sung,Shim In-Bo,Kim Chul Sung 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.6
The NaFeO2 sample was synthesized using the solid-state reaction method. X-ray diffraction (XRD) was performed to confirm the crystal structure of NaFeO2 using an X-ray diffractometer. The crystal structure of NaFeO2 was confirmed to be a trigonal structure with a space group of R-3 m. The lattice parameters were found to be a0 = b0 = 3.0251 Å and c0 = 16.0983 Å. The temperature dependence of the zero-field-cooled (ZFC) and field-cooled (FC) curves from temperatures of 4.2–295 K was measured using the vibrating sample magnetometer (VSM). From the ZFC–FC curves, it was found that the Néel temperature (TN) of NaFeO2 was 11 K. The temperature dependence of the Mössbauer spectra from 4.2 to 295 K indicates that the magnetic hyperfine field (Hhf) and isomer shift (δ) decreased with increasing temperature. The electric quadrupole splitting (ΔEQ) rapidly increased at TN.