• 한국콘텐츠학회논문지
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• 제15권6호
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• pp.62-72
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• 2015

본 연구는 비즈니스 생태계의 관점에서 신규 진입자의 중요성을 논의하고, 한국 영화 산업 내 신생 기업의 성장 전략을 사례연구를 기반으로 분석하였다. 비즈니스 생태계가 발전적인 공진화를 지속하기 위해서는 다수의 참여자가 각각의 고유한 역량을 기반으로 하여 상호 역량을 보완하고 연계시키는 것이 필요하며, 특히 생태계 전체의 건강성 향상을 위해서는 경쟁력을 갖춘 신생기업의 진입과 성장이 중요하다. 한국 영화산업은 현재 대기업들에 의한 수직 통합으로 인해 신생 기업들의 진입이 제한적이고, 제약된 거래에 대한 우려의 목소리가 높다. 영화 산업도 지속적으로 성장하고 경쟁력을 갖추려면 산업의 구성원들이 공존할 수 있는 공정한 환경을 만들어야 하며, 틈새시장에서 성공하는 신생 기업들의 수가 더욱 증가해야 한다. 본 논문에서는 영화 산업의 배급 분야에서 최근 신생 기업으로서 대표적인 성공 사례로 손꼽히는 넥스트엔터테인먼트월드(NEW)의 기존 기업과 차별화되는 투자 기준, 독특한 마케팅 전략, 작은 규모를 오히려 강점으로 전환한 능력, 조직 내의 빠른 의사결정 프로세스, 그리고 영화산업에서 오랜 경험을 갖춘 대표이사와 구성원의 역량이라는 성공 요인들을 기반으로 하여, 신생기업의 성공의 필요성과 한국영화산업의 건강성을 제고할 수 있는 시사점을 제시하였다. 그리고 연구결과를 바탕으로 시사점과 연구의 한계점 및 향후 연구방향을 제시하였다.

• KDI Journal of Economic Policy
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• 제26권1호
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• pp.71-104
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• 2004

본 연구에서는 기업구조조정의 세부수단을 계량화하고 각 수단과 워크아웃기업의 회생 여부 간에 유의적인 관계가 존재하는지를 확인하였다. 실증분석을 실시한 결과를 요약하면 다음과 같다. 첫째, 채권자 및 채무자 관점 모두에서 워크아웃을 신청할 당시 기업의 채무구조가 동 기업의 회생 여부에 매우 유의적인 영향을 미친 것으로 나타났다. 둘째, 대부분의 부채조정수단이 워크아웃기업에 큰 영향이 없었던 가운데 이 중 출자전환이 비교적 유효한 구조조정 수단인 것으로 분석되었다. 셋째, 자구노력, 고용조정, 그리고 경영진 및 지배구조 교체는 워크아웃기업의 회생 여부에 미친 유의성이 낮았다. 워크아웃기업이 회생하는 데 있어서 세부적인 기업구조조정수단, 즉 채무재조정, 자구노력, 고용조정, 지배구조개선 등보다는 워크아웃 신청 당시 기업의 채무구조가 중요하였다는 측면에서 우리나라의 워크아웃은 기업구조조정을 통한 효율적인 자원배분보다는 채권회수율을 제고하려는 채권자와 금융위기를 극복하려는 정책당국자의 유인구조에 충실하였던 제도라고 평가할 수 있다.

• 디지털융복합연구
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• 제12권10호
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• pp.235-242
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• 2014

전사적 보안을 위한 요구사항은 점차 커지고 있는 반면, 이를 구현하기 위한 수단 중 하나인 보안협업에 대한 연구는 매우 미흡하다. 따라서 본 논문은 보안협업에 대한 개념 정립을 통해 보안협업의 유형을 분석하고, 효과적 보안협업 수행을 위한 핵심 성공요인들을 파악하고자 한다. 이를 위해 조직관리 분야에서의 기존 연구를 조사 분석하여 보안협업 모델을 정립하였고, 협업에 영향을 미치는 요인 및 보안특성을 반영하여 협업 인력, 협업 프로세스, 협업 환경 등 세 영역에서 여덟 개의 변수를 도출하였다. 본 연구는 경력 3년 이상 보안 및 IT 전문가 106명의 데이터를 수집, PLS-SEM를 사용하여 검증을 하였다. 본 연구의 결과로는 협업 구성원의 신뢰성, 전문성, 참여 동기와 협업 성과기준, 최고경영자의 의지, 협업지원도구 등이 보안협업에 영향을 미치는 요인으로 나타났다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.1
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• pp.179-184
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• 2006

Rapid and high-precision positioning with a Global Navigation Satellite System (GNSS) is feasible only when very precise carrier-phase observations can be used. There are two kinds of mathematical models for ambiguity resolution. The first one is based on both pseudorange and carrier phase measurements, and the observation equations are of full rank. The second one is only based on carrier phase measurement, which is a rank-defect model. Though the former is more commonly used, the latter has its own advantage, that is, ambiguity resolution will be freed from the effects of pseudorange multipath. Galileo will be operational. One of the important differences between Galileo and current GPS is that Galileo will provide signals in four frequency bands. With more carrier-phase data available, frequency combinations with long equivalent wavelength can be formed, so Galileo will provide more opportunities for fast and reliable ambiguity resolution than current GPS. This paper tries to investigate phase only fast ambiguity resolution performance with four Galileo frequencies for short baseline. Cascading Ambiguity Resolution (CAR) method with selected optimal frequency combinations and LAMBDA method are used and compared. To validate the resolution, two tests are used and compared. The first one is a ratio test. The second one is lower bound success-rate test. The simulation test results show that, with LAMBDA method, whether with ratio test or lower bound success rate validation criteria, ambiguity can be fixed in several seconds, 8 seconds at most even when 1 sigma of carrier phase noise is 12 mm. While with CAR method, at least about half minute is required even when 1 sigma of carrier phase noise is 3 mm. It shows that LAMBDA method performs obviously better than CAR method.

• 한국임상수의학회지
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• 제34권1호
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• pp.13-17
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• 2017

This study evaluated the efficacy and safety to determine the therapeutic responses of oclacitinib in canine atopic dermatitis (CAD) and identified factors related to the therapeutic response. Overall, 13 dogs with CAD were treated with oclacitinib for 56 days. Owners and veterinarians assessed visual analog scale (VAS) scores of pruritus and dermatitis. The examined dogs were grouped according to treatment success and failure based on changes in the VAS scores. To identify factors related to the therapeutic responses of oclacitinib, signalments (breed, sex, age, and body weight), mean progression time of CAD, mean Owner and Veterinarian VAS scores at day 0, and preexisting infection rate were compared between the two groups. Among the 13 dogs, 7 (53.8%) met the criteria of treatment success. In the success group, the Owner VAS scores were significantly lower from day 6 to 56 compared with the score at day 0 (P < 0.05). Additionally, the Veterinarian VAS scores were significantly decreased at days 14 and 42 compared with the score at day 0 (P < 0.05). There were no changes in hematological indices after the administration of oclacitinib. The most common abnormality reported was otitis externa (30.8%), followed by pyoderma (23.1%), and vomiting (7.7%). Factors related to responses of oclacitinib were not identified. This study demonstrated that oclacitinib was safe and moderately effective in dogs with CAD. This is the first report of the clinical application of oclacitinib in South Korea.

• Journal of Korean Neurosurgical Society
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• 제39권6호
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• pp.413-418
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• 2006

Objective : The objective of this study is to evaluate and compare the clinical results between classical open surgery and percutaneous endoscopic lumbar discectomy[PELD] in cases of extraforaminal lumbar disc herniation. Methods : We obtained the clinical data from 47 patients with extraforaminal lumbar disc herniations who underwent the open paramedian muscle-splitting approach or percutaneous endoscopic lumbar discectomy[PELD] between January 2001 and February 2004. This study consisted of patients with soft disc extraforaminal herniations. The patients were assessed with the visual analogue scale[VAS] and MacNab's criteria before surgery, just before discharge, and postoperative 1 year. Results : There were 25 cases in the open surgery group and 22 cases in the PELD group. The average operating time was $78{\pm}36.71\;min$ in the PELD group and $110{\pm}29.68\;min$ in the open surgery group. The mean hospital stay was $2.73{\pm}2.62$ days in the PELD group and $7.68{\pm}2.59$ days in the open surgery group. VAS decreased from $8.34{\pm}0.66$ to $1.29{\pm}2.27$ in the PELD group and from $8.40{\pm}1.40$ to $1.70{\pm}1.72$ in the open surgery group at the one-year follow-up. The success rate of PELD was 86.4%, compared with 80.0% for open surgery. However, there were no statistically significant difference between two groups for success rate and VAS. Conclusion : Although the success rates were similar in both groups, PELD is less invasive, faster, and safe procedure than open surgery for extraforaminal disc herniation in selected patients.

• 시스템엔지니어링학술지
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• 제16권2호
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• pp.27-37
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• 2020

The Fukushima Daiichi accident in 2011 revealed some vulnerabilities of existing Nuclear Power Plants (NPPs) under extended Station Blackout (SBO) accident conditions. One of the key Severe Accident Management (SAM) strategies developed post Fukushima accident is the In-Vessel Retention (IVR) Strategy which aims to retain the structural integrity of the Reactor Pressure Vessel (RPV). RELAP/SCDAPSIM/MOD3.4 is selected to predict the thermal-hydraulic response of APR1400 undergoing an extended SBO. To assess the effectiveness of the IVR strategy, it is essential to quantify the underlying uncertainties. In this work, both the epistemic and aleatory uncertainties are considered to identify the success window of the IVR strategy. A set of in-vessel relevant phenomena were identified based on Phenomena Identification and Ranking Tables (PIRT) developed for severe accidents and propagated through the thermal-hydraulic model using Wilk's sampling method. For this work, a Systems Engineering (SE) approach is applied to facilitate the development process of assessing the reliability and robustness of the APR1400 IVR strategy. Specifically, the Kossiakoff SE method is used to identify the requirements, functions and physical architecture, and to develop a design verification and validation plan. Using the SE approach provides a systematic tool to successfully achieve the research goal by linking each requirement to a verification or validation test with predefined success criteria at each stage of the model development. The developed model identified the conditions necessary for successful implementation of the IVR strategy which maintains the vessel integrity and prevents a melt-through.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권6호
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• pp.324-331
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• 2023

Objectives: The purpose of this study was to evaluate the outcomes of implants placed in horizontally augmented alveolar ridges using porcine bone grafts and to investigate the long-term stability of the porcine bone grafts. Materials and Methods: A retrospective analysis was conducted on 49 sites that underwent horizontal ridge augmentation using porcine bone grafts and implant placement with a follow-up period longer than 5 years. Furthermore, additional analysis was conducted on 24 sites where porcine bone grafts were used exclusively for horizontal ridge augmentation and implant placement. Results: The mean follow-up period after prosthesis loading was 67.5 months, with a mean marginal bone loss of 0.23 mm at 1 year and a cumulative mean marginal bone loss of 0.40 mm over the entire follow-up period. Of the 49 implants, 2 were lost and 3 did not meet the success criteria, resulting in a survival rate of 95.9% and a success rate of 89.8%. In 24 sites, the mean marginal bone loss was 0.23 mm at 1 year and 0.41 mm at 65.8 months, with 100% survival and success rates. Conclusion: Porcine bone grafts can be successfully used in horizontal ridge augmentation for implant placement in cases of ridges with insufficient horizontal width.

• Korean Journal of Radiology
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• 제22권1호
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• pp.63-71
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• 2021

Objective: To identify the CT findings associated with treatment failure after antibiotic therapy for acute appendicitis. Materials and Methods: Altogether, 198 patients who received antibiotic therapy for appendicitis were identified by searching the hospital's surgery database. Selection criteria for antibiotic therapy were uncomplicated appendicitis with an appendiceal diameter equal to or less than 11 mm. The 86 patients included in the study were divided into a treatment success group and a treatment failure group. Treatment failure was defined as a resistance to antibiotic therapy or recurrent appendicitis during a 1-year follow-up period. Two radiologists independently evaluated the following CT findings: appendix-location, involved extent, maximal diameter, thickness, wall enhancement, focal wall defect, periappendiceal fat infiltration, and so on. For the quantitative analysis, two readers independently measured the CT values at the least attenuated wall of the appendix by drawing a round region of interest on the enhanced CT (HU_post) and non-enhanced CT (HU_pre). The degree of appendiceal wall enhancement (HU_sub) was calculated as the subtracted value between HU_post and HU_pre. A logistic regression analysis was used to identify the CT findings associated with treatment failure. Results: Sixty-four of 86 (74.4%) patients were successfully treated with antibiotic therapy, with treatment failure occurring in the remaining 22 (25.5%). The treatment failure group showed a higher frequency of hypoenhancement of the appendiceal wall than the success group (31.8% vs. 7.8%; p = 0.005). Upon quantitative analysis, both HU_post (46.7 ± 21.3 HU vs. 58.9 ± 22.0 HU; p = 0.027) and HU_sub (26.9 ± 17.3 HU vs. 35.4 ± 16.6 HU; p = 0.042) values were significantly lower in the treatment failure group than in the success group. Conclusion: Hypoenhancement of the appendiceal wall was significantly associated with treatment failure after antibiotic therapy for acute appendicitis.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제38권
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• pp.42.1-42.7
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• 2016

Background: The purpose of this retrospective study was to evaluate the clinical utility of an implant with a sandblasted, large-grit, acid-etched (SLA) surface and internal connection. Methods: Six patients who received dental implants in the Department of Oral and Maxillofacial Surgery, Chonnam National University Dental Hospital, were analyzed by factors influencing the success rate and marginal bone loss. Factors included patient's age, sex, implant installation site, whether bone graft was done, type of bone graft materials, approaching method if sinus lift was done, and the size of the fixture. In addition, the marginal bone loss was analyzed by using a radiograph. Results: All implants were successful, and the cumulative survival rate was 100 %. Average marginal bone loss of 6 months after the installation was 0.52 mm and 20 months after the functional loading was 1.06 mm. Total marginal bone resorption was 1.58 mm on average. There was no statistically significant difference in mesial and distal marginal bone loss. Conclusions: The short-term clinical success rate of the implant with an SLA surface and internal connection was satisfactory. Moreover, the marginal bone loss was also consistent with the implant success criteria.