• Journal of Digestive Cancer Research
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• 제1권1호
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• pp.17-23
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• 2013

식도암의 치료는 근치적 절제와 화항방사선치료를 포함하는 다중치료가 보편적으로 받아들여지고 있다. 그러나 치료의 종양학적 결과는 충분히 만족스러운 수준에 이르고 있지 못하다. 이에 대하여 기존 항암 화학요법과 방사선치료, 수술 그리고 표적약물의 적용에 대한 연구가 지속되고 있다. 이 논문에서는 문헌과 보고를 근거로 식도암 치료에 대한 최근의 합의과 권고를 정리하였다.

• Journal of Information Technology Applications and Management
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• 제21권4_spc호
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• pp.309-329
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• 2014

This paper proposes an integrative framework for determining a dominant design in the mobile operation systems. A dominant design has emerged as a de facto standard from traditional industries to ICT. ICT-related industries have been reorganized around the mobile industry in which the mobile operation system can be seen as a strategical keystone. In this paper, we develop a holistic approach for the emergence of a dominant design in the mobile operation systems. Firstly, we combined an integrative framework based on previous research findings with new determinants derived from cases of the mobile operation systems. Secondly, we categorized all determinants according to technological, firm-level and environmental factors within our proposed framework. Finally, we compared this framework to patterns coded from cases which include Android and iOS. This results show that a dominant design is likely to emerge as a result of the interaction of the determinants, not the influence of a single determinant. Furthermore, our proposed framework may extend the existing literature on dominant designs in both researchers and practitioners and provide implications to actors for establishing a competition strategy in the mobile telecommunication ecosystems.

• Journal of Forest and Environmental Science
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• 제28권3호
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• pp.170-178
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• 2012

Dipterocarps or Dipterocarpaceae is a commercially important timber producing and dominant keystone tree family in the rain forests of Borneo. Borneo's landscape is changing at an unprecedented rate in recent years which affects this important biodiversity. This paper attempts to model the natural occurrence (distribution including those areas with natural forests before being converted to other land uses as opposed to current distribution) of dipterocarp species in Sarawak which is important for forest biodiversity conservation and management. Local modeling method of Inverse Distance Weighting was compared with commonly used statistical method (Binary Logistic Regression) to build the best natural distribution models for three genera (12 species) of dipterocarps. Database of species occurrence data and pseudoabsence data were constructed and divided into two halves for model building and validation. For logistic regression modeling, climatic, topographical and edaphic parameters were used. Proxy variables were used to represent the parameters which were highly (p>0.75) correlated to avoid over-fitting. The results show that Inverse Distance Weighting produced the best and consistent prediction with an average accuracy of over 80%. This study demonstrates that local interpolation method can be used for the modeling of natural distribution of dipterocarp species. The Inverse Distance Weighted was proven a better method and the possible reasons are discussed.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제21권3호
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• pp.284-287
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• 1999

The nose, a striking features of the human face, is regarded by many clinicians as the keystone of facial esthetics. Clinically, as the treatment of a dentofacial deformity, the soft tissue changes that occurred normally with movement of the skeletal bases. Changes of the soft tissue in the maxillary orthognathic surgery are widening of alar base, elevated nasal tip and flattening of upper lip. In addition, soft tissue change is difficult to predict, it has considerable variability in the response of soft tissue. We reviewed patients who received Le Fort I advancement osteotomy in our department and analysed preoperative and postoperative alar base width, nasal height in clinical measurement and cephalometry and patient's satisfaction of postoperative nasal appearance.

• 한국환경복원기술학회지
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• 제3권1호
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• pp.70-79
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• 2000

Arbuscular mycorrhizal(AM) fungi have significant role for ecosystem structure and function. They are the major component of forest soil ecosystems and critically important for water and nutrient cycling in the system. To understand the ecology of AM fungi the fungal spores were collected, identified and counted in forest soils under various climatic and edaphic conditions. In relation to soil depth 90% of AM fungi spores and mycorrhizas distributed within 15cm soil depth. Number of spores per $100m{\ell}$ forest soil volume was 5 to 36 spores from 1 to 3 fungal species. AM fungal species diversity was higher in warmer climates, and more moist and fertile soils. The most frequently found species were Gigaspora decipiens irrespective of soil moisture and Gi. gigantea irrespective of soil fertility. In the Jeju island the soils of Cryptomeria japonica plantations and Miscanthus sinensis var. purpurascens meadow had more AM spores than the other soils. We suggest AM fungi be considered as keystones species when restoring a disturbed forest ecosystem.

• Spatial Information Research
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• 제16권3호
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• pp.343-357
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• 2008

홍도와 흑산도는 다도해해상국립공원과 신안군의 주요 관광지이다. 이들 지역에서 생태계에서 상위계층인 수달의 서식지 조건을 현지조사, 공간분석을 통하여 잠재적 서식처를 도출하였으며, 해안지역에 지하 eco-corridor의 설치를 제언하였다. 지리정보시스템의 분석기능과 위성사진을 이용한 식생 및 서식 조건 분석, 실제 야외조사와 탐문을 통한 조사를 수행하였다. 해식애와 격리된 지형조건과 수문조건을 포함하여 도로로 인한 이동통로의 단절 등의 문제가 관찰되었다. 바다에 의한 격리조건으로 육지의 수달서식처보다 안전성 면에서 우위적 위치를 점할 수 있으므로 세부적인 서식처 보호를 기반으로 한 지역개발정책은 도서로 구성된 신안군의 차별화된 전략으로 추진될 수 있을 것으로 사료된다.

• 한국산학기술학회논문지
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• 제15권3호
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• pp.1327-1333
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• 2014

IT융합은 제조업 등 타 산업 분야의 경쟁력을 향상시키는데 기여하고 있다. 지금까지 정부는 융합기술 개발 및 사업화에 많은 지원을 해왔으며 몇몇 선도기업에서는 의미 있는 성과를 거두고 있다. 그러나 IT융합을 기반으로 산업 경쟁력을 강화하기 위해서는 다양한 융합 시도가 이뤄질 수 있는 생태계가 구축되어야 하며, 많은 기업들이 융합에 참여하고 협력하며 그 혜택을 널리 공유할 수 있는 환경이 마련되어야 한다. 본 연구에서는 AHP 분석을 토대로 IT융합을 촉진하기 위한 이해관계자들의 역할을 도출하고자 하였다. 연구 결과, IT융합을 촉진하기 위한 산업 생태계 마련을 위해 정부의 규제 완화와 벤처 육성정책 확대, 키스톤 기업의 협업기반 융합과제 확대와 경험 공유, 벤처기업 등 기술개발 주체의 기술역량 강화, 그리고 크로스오버형 인재양성을 위한 대학의 역할이 필요한 것으로 나타났다.

• 한국항공우주학회지
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• 제34권6호
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• pp.67-74
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• 2006

본 논문에서는 저가의 클러스터 컴퓨터 시스템과 저해상도 영상장비들을 이용하여 초대형 해석 데이터를 정밀하게 분석할 수 있는 고해상도 타일 가시화 시스템을 개발하였다. 타일 가시화 하드웨어 구축 시 유의점을 고찰하고, 화면왜곡 현상을 제거할 수 있는 빔프로젝터 위치조절장치를 설계/제작하였다. 타일 가시화 소프트웨어 개발에서 그래픽 사용자 인터페이스와 렌더링을 위해서는 Qt와 OpenGL 라이브러리를 이용하였다. 또한 LAM-MPI 라이브러리를 통해 각각의 클러스터 컴퓨터 노드로부터 얻게 되는 조각적인 화면들을 전체의 한 화면으로 동기화시켜 왜곡 없는 전체 타일 영상을 만들도록 하였다.

• ETRI Journal
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• 제44권4호
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• pp.686-694
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• 2022

Fog screens offer a great advantage to be used as scattering screens in three-dimensional displays. In the absence of a fixed rigid form, fog screens work as screens without any physical obstruction. The density of water droplets can be regulated to adjust the screen's transparency and scattering level. This study proposes a method for crosstalk reduction between adjacent viewing windows by decreasing the divergence of view of the projector, with concentration lenses. By applying the Scheimpflug principle, we also reduce the keystone effect, which occurs when the fog screen is slanted with respect to the optical axis. In this study, we have realized a tabletop multiview fog display without any structures on the table and established that the proposed method is feasible for decreasing crosstalk effectively.

• Fisheries and Aquatic Sciences
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• 제26권4호
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• pp.294-303
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• 2023

Beside that the fish species and their sub-populations are highly important as a keystone species in the coastal and marine ecosystem, there are very few studies on their presence, distribution and temporal variations within and around the lagoon ecosystems in Albania. This paper provides an updated review on the life cycle, fishery, exploitation state and management of the main species that are subject of commercial fishing in the Karavasta lagoon, southeastern Adriatic coast of Albania. Due to the fact that lagoons represent a continuum between continental and marine aquatic ecosystems they play a crucial role in species life cycles. Further on in the circumstances of rapid utilizations and environmental changes, anomalies in salinity and temperatures, accelerated anthropogenic influences their rate of vulnerability is highly increased. Following the requirements of the Water Framework Directive, transitional water, coastal lagoons and estuaries there is a need for urgent monitoring and management approaches. The commercial species include: European eel (Anguilla anguilla), species of Family Mugilidae (Mugil cephalus, Liza ramada, Liza salienes and Chelon labrosus), Seabream (Sparus aurata), Seabass (Dincentrarchus labrax), etc. Fish productivity is oscillating from maximum value of 61.95 kg/ha is recorded in period of 1975-80 and lower value of 31 kg/ha in year 2020. Our study highlights importance of fish and fishery long-term monitoring, and contributes to understand the driving factors in productivity, migration patterns and species ecology in the vital coastal ecosystems.