• Hip & pelvis
• /
• 제35권3호
• /
• pp.157-163
• /
• 2023

Purpose: This study examined the methods for treatment of femoral neck fracture (FNF) preferred by members of the Korean Hip Society (KHS) and identified factors that influence decisions regarding the surgical intervention of choice. Materials and Methods: A total of 97 members of the KHS responded to the 16-question survey which included questions about the mean number of surgeries performed each month for treatment of femoral neck fractures, the cut-off age for deciding between internal fixation and arthroplasty, the implant used most often, usage of cement, and factors influencing each decision. Results: The mean cut-off age used when deciding between internal fixation and arthroplasty was 64 years old. Hemiarthroplasty (HA) (70%) was the most preferred option for treatment of displaced FNFs in cases where arthroplasty was indicated (total hip arthroplasty [THA] 19% and dual mobility THA 11%). The main reasons for selection of arthroplasty over reduction with internal fixation were age and pre-fracture ambulatory status. Pre-trauma ambulatory status and/or sports activity were the main factors in selection of HA over THA. Cement was used by 33% of responders. Poor bone quality and a broad femoral canal were factors that influenced the usage of cement. Conclusion: Management of FNFs in the elderly is a major health problem worldwide; thus, remaining alert to current trends in treatment is essential for surgeons. The mean cut-off age used in deciding between internal fixation and arthroplasty was 64 years old. HA is the preferred method for treatment of displaced FNFs for members of the KHS.

• 한국항만경제학회지
• /
• 제36권1호
• /
• pp.59-76
• /
• 2020

본 연구는 중고선박 매매계약 체결 시 사용되는 계약사의 주요 선택기준에 대한 요인을 분석하여 상황별 합리적인 계약의 선정에 도움을 주고자 분석한 것이다. 선박 매매 양식의 여러 선정요인 가운데 우선적으로 고려해야 하는 요인을 파악하기 위해서 선박매매를 담당하는 전문가와 선사의 담당자와 인터뷰를 통하여 세부요인을 추출한 다음 AHP분석을 실시하였다. AHP분석을 위해서 3가지 요인을 Level 1로 하였으며, 각 상위계층에 5가지의 하위 세부요인을 Level 2로 구성하여 전무가 집단의 설문조사를 통해 종합 중요도 순위를 분석하였고, 두 개의 계약양식의 선정기준으로 요인을 비교분석하였다. 본 연구의 결과, 첫째, 계약 양식의 선정요인에서 계약의 유지능력, 인도장소와 시점, 내용의 완결성 등이 가장 중요한 요소이며, 둘째, 계약양식의 선정과정에서 양자 요인을 비교한 결과, 지정권자의 지위와 인도장소와 시점의 경우 양자의 선호도의 큰 차이는 없었다. 그러나 내용의 완결성, Payment & Deposit, 최신 거래의 흐름 반영, 지역적 요인 등의 나머지 요인은 NIPPON1999의 28.5%에 비해 NSF가 약 70% 이상의 높은 선호도를 보였다. 따라서 이러한 결과를 인식하여 선박매매 당사자가 상황에 맞게 계약서를 작성하고 두 계약양식의 차이점을 명확히 인지하고 보다 합리적인 조항을 선택함으로써 분쟁을 예방하는 것이 중요하다.

• 한국통신학회논문지
• /
• 제30권10B호
• /
• pp.639-647
• /
• 2005

WPAN에서는 망 중재를 위하여 하나의 피코넷 코디네이터(Piconet Coordinator; PNC)가 요구되는데, 이러한 코디네이터는 망을 구성하는 디바이스들 중에서 선발된다. 그리고 선발된 PNC가 피코넷을 이탈하거나 운영을 중지할 때 또는 현재의 PNC보다 더 능력이 우수한 디바이스가 피코넷에 참여할 때 PNC 핸드오버(Handover) 과정을 통하여 신규 PNC로 PNC역할이 이양된다. 고속 WPAN 표준화 권고안(IEEE 802.15.3)에서는 PNC 핸드오버를 위해 신규 PNC를 선발할 때 디바이스의 규격과 관련된 능력(Device Capability) 정보요소 (Information Element; IE)만을 기준으로 제시하고 있다. 본 논문에서는 PNC 후보를 선발할 때 고려해야 하는 정보요소로 통신가능성(Accessibility)을 살펴보고, 제시한 통신가능성 정보요소를 고려한 PNC 선택 방법을 제안하였다. 제안하는 PNC 선택 방법은 피코넷에 참여중인 디바이스들을 최대한 상속함으로써 보다 효과적인 피코넷 운영관리가 가능하며, 유지하고 있는 PNC 후보 목록을 이용하여 기존의 PNC가 긴급하게 피코넷에서 이탈하는 경우에 PNC 선택 과정 없이 PNC 후보 목록 중에 우선 순위가 가장 높은 디바이스에게 PNC 핸드오버를 실시할 수 있으므로 긴급한 경우에 효과적인 대처가 가능한 장점이 있다.

• 한국의류학회지
• /
• 제23권4호
• /
• pp.529-540
• /
• 1999

The purpose of this study is examine how price attitude and risk perception affect6 consumer's attitude to clothing discount stores. As for the methods of the research 313 female consumers who just finished shopping at discount stores were interviewed and questioned. The result is as the following. 1. The factors such as discount price inclination effective value inclination price-quality association and price-social grade association in the price attitude as well as social psychological risk and the risk of losing opportunity in the risk perception affected consumer's attitude to clothing discount store. 2. The domestic national brand discount store acquired the highest scores in all factors but discount inclination factor and low price inclination factor. No difference was seen between stores in terms of the risk perception. 3. The determining factors for repurchase intention were found to be store satisfaction and the attitude to clothing discount store. 4. The convenience of transportation the availability of exchange or repair the payment option the quality of the product and the attributes of the store e, g, good quality with relatively low price affected the store satisfaction. 5. Domestic national brand discount store showed higher score in 'good quality with relatively low price' than domestic casual brand discount store did. And difference between groups was found in repurchase intention, Conclusively most consumers using clothing discount stores are effective value-oriented.

• 대한치과보철학회지
• /
• 제38권3호
• /
• pp.360-365
• /
• 2000

The completely edentulous patient has few treatment options in conventional dentistry. When implants are considered, treatment plans range from a 2-implant overdenture to a completely implant-supported prosthesis. Fixed prosthesis is often the preferred selection of the edentulous patient. fixed full-arch cert amo-metal restorations can be a predictable implant treatment modality for the edentulous patient. Implant-supported fixed prosthesis has several advantages: predictability, fixedness, retrievability, improved function, lower maintenance of prosthesis, long-term published success. Edentulous patients with a severely resorbed mandible often experience problems with their dentures. Treatment concepts involving two to four implants for the support of an overdenture have been proposed. There seems to be no need to insert more than two endosteal implants to support an overdenture, however, long-term prospective studies are needed to support this notion. Using short endosseous implants and an overdenture in the extremely resorbed mandible is a justified treatment option because of the relative simplicity and low morbidity of this treatment strategy. Implant-supported overdenture has several advantages: Cost, retrievability, hygiene access, profile and contour control, increased retention and stability, implant installed in a predicted region(ant. mandible).

• 항공우주기술
• /
• 제9권2호
• /
• pp.123-128
• /
• 2010

과학기술위성 3호는 무게 170kg 이하의 과학적 임무를 수행하는 위성이다. 이 위성은 소형위성, 또는 세부적으로 마이크로 위성으로 분류된다. 이러한 소형위성을 위한 발사체는 각 발사체별로 다른 환경적 인터페이스를 가진다. 소형위성들은 일반적으로 다중 발사되기 때문에 적합한 발사체 선정에 제한적이다. 따라서 위성 개발 초기부터, 소형위성은 소형위성 발사체의 환경요건을 고려하여 디자인 되어야한다. 본 논문에서는 소형위성 발사에 적합한 발사체의 환경적 요구사항을 정리하고, 이러한 모든 발사체의 요구조건을 수용할 수 있는 요구조건을 제시 한다.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2003년도 학술대회지
• /
• pp.333-336
• /
• 2003

본 연구의 목적은 국내 맞춤주택(아파트)에 있어 주거욕구충족을 위한 주택수요자의 요구사항을 분석하는데 있다. 연구의 진행은 국내 맞춤주택의 현 입주자와 잠재수요자들을 대상으로 설문조사론 실시, 이룰 분석하는 것으로 이루어졌다. 이와 같은 과정을 통하여 도출된 결론을 요약하면 다음과 같다 : 1) 맞춤주택에 있어 수요자가 가장 많이 필요로 하는 사항은 공간과 마감재의 다양한 선택인 것으로 나타났다. 2) 마감재의 경우, 수요자들이 인하는 선택의 최소 폭은 $4\~6$가지 종류인 것으로 나타났다.

• 한국자기공명학회논문지
• /
• 제17권1호
• /
• pp.11-18
• /
• 2013

Rapid advances of computational power and method have made it practical to apply the time-consuming calculations with all-atom force fields and sophisticated potential energies into refining NMR structure. Added to the all-atom force field, generalized-Born implicit solvent model (GBIS) contributes substantially to improving the qualities of the resulting NMR structures. GBIS approximates the effects that explicit solvents bring about even with fairly reduced computational times. Although GBIS is employed in the final stage of NMR structure calculation with experimental restraints, the effects by GBIS on structures have been reported notable. However, the detailed effect is little studied in a quantitative way. In this study, we report GBIS refinements of ubiquitin and GB1 structures by six GBIS models of AMBER package with experimental distance and backbone torsion angle restraints. Of GBIS models tested, the calculations with igb=7 option generated the closest structures to those determined by X-ray both in ubiquitin and GB1 from the viewpoints of root-mean-square deviations. Those with igb=5 yielded the second best results. Our data suggest that the degrees of improvements vary under different GBIS models and the proper selection of GBIS model can lead to better results.

• Clinical and Experimental Reproductive Medicine
• /
• 제42권3호
• /
• pp.126-129
• /
• 2015

Essure (Bayer) received approval from the U.S. Food and Drugs Administration as a permanent non-hormonal contraceptive implant in November 2002. While the use of Essure in the management of hydrosalpinx prior to in vitro fertilization (IVF) remains off-label, it has been used specifically for this purpose since at least 2007. Although most published reports on Essure placement before IVF have been reassuring, clinical experience remains limited, and no randomized studies have demonstrated the safety or efficacy of Essure in this context. In fact, no published guidelines deal with patient selection or counseling regarding the Essure procedure specifically in the context of IVF. Although Essure is an irreversible birth control option, some patients request the surgical removal of the implants for various reasons. While these patients could eventually undergo hysterectomy, at present no standardized technique exists for simple Essure removal with conservation of the uterus. This article emphasizes new aspects of the Essure procedure, as we describe the first known association between the placement of Essure implants and the subsequent development of fluid within the uterine cavity, which resolved after the surgical removal of both devices.

• Clinical and Experimental Reproductive Medicine
• /
• 제41권2호
• /
• pp.41-46
• /
• 2014

IVM refers to the maturation of immature oocytes in culture after their recovery from small antral follicles at the stage prior to selection and dominance. IVM requires little or no FSH in vivo and has been proposed as an alternative to conventional IVF, since it reduces the primary adverse effects caused by controlled ovarian stimulation, including the ovarian hyperstimulation syndrome. Moreover, IVM is a promising option for cases for which no standard protocol is suitable, such as FSH resistance, contraindications for ovarian stimulatory drugs, and the need for urgent fertility preservation. Recently, IVM has been used in women with regular cycles and normal ovaries. However, the pregnancy rate following IVM is suboptimal compared with that of conventional IVF, indicating that further studies to optimize the protocol and the culture conditions are warranted.