멀티미디어 처리를 위한 데이터베이스 시스템의 버퍼 설계

한갑수 한국산업정보응용수학회 2001 한국산업정보응용수학회 Vol.5 No.2

멀티미디어 응용 시스템을 처리하면서 더욱 발전된 형태의 기능을 얻기 위해서는 사용하는 대용량 연속성 객체를 파일 시스템보다 데이터베이스 시스템으로 처리하는 것이 효과적이다. 그러나 대용량 멀티미디어 객체를 대부분 기존의 데이터베이스 시스템의 운영방식과 같이 소용량 객체와 동일한 구조의 버퍼에 저장하고 처리하면 객체간의 서로 다른 특성으로 인하여 여러 가지의 간섭 현상이 발생하게 된다. 따라서 멀티미디어 대용량 객체와 기존의 트랜잭션의 소용량 객체 사이의 간섭현상을 방지하고 멀티미디어 객체를 효율적으로 처리하기 위해서는 기존 데이터베이스 시스템에서 사용하는 버퍼시스템의 처리 기능을 향상하는 것이 필수적이다. 최근까지도 대부분의 데이터베이스 시스템에서는 이미지 같은 멀티미디어 데이터를 처리 시에 일반 트랜잭션의 소용량 객체와 동일한 구조의 버퍼에서 처리한다. 그러한 체제하에서 만일 비디오 또는 오디오 같은 대용량 객체를 처리하면 소용량 객체와의 심각한 간섭 현상과 문제점이 발생하게 되는데 그것은 객체간의 서로 이질적인 특성과 자원의 요구로 인하여 발생된다. 따라서 본 논문에서는 멀티미디어 대용량 객체와 일반 트랜잭션의 소용량 객체 사이에 간섭 현상을 배제하여 멀티미디어 기능과 일반 트랜잭션을 효율적으로 처리하기 위한 버퍼 시스템의 설계를 제시하고 비교 실험을 통해 효율성을 입증한다. In order to process multimedia applications which mainly use large objects, we should use a database system rather than a file system to store and process multimedia large objects for better functionality. But if we store and process large and small objects together in one database buffer system, then interference will occur among them due to their different characteristics. This leads us to consider the enhancement of processing mechanism of the existing database buffer system to control the interference between large and small objects proper1y avoiding degradation of performance. Up to now, existing database management systems process large objects such as images together with small objects under the same buffer mechanism. Under the existing approach, if we try to process large objects such as video, audio, then we have to suffer from severe interference between large and small objects due to their heterogeneous characteristics. This paper presents the architecture and management of a buffer system for processing mu1timedia objects efficiently without interference between large and small objects and validates the effectiveness of the buffer system through comparative experiments.

법률사무 한글전용에 따른 인명, 지명 한글 표기

한갑수 한국사법행정학회 1969 사법행정 Vol.10 No.5

The Process and Method to Set a Mountainous Scenic Site’s Designated Area

한갑수,김순기,함광민 강원대학교 산림과학연구소 2020 Journal of Forest Science Vol.36 No.1

A “Scenic Site” is an official heritage category legally defined as a “scenic site of outstanding artistic value with excellent scenic views.” However, the subjective interpretation of the term causes several problems. This study suggested a systematic, organized process of designating a listed area as a scenic site after careful and detailed quantitative and qualitative analysis. Indicators were identified for each of the two analyses, and then scored and weighted. Quantitative indicators were distributed within 5 points for each indicator. Water, which is a natural indicator, based on distance from river boundaries. Forest landscapes were assigned in consideration of forest physiognomy and age class. Land use was allocated in consideration of land cover type and, in case of development site, ‘-’ score was assigned. Cultural heritage conservation area, which is historical and cultural indicator, was distributed by distance within a maximum of 500 meters. Visibility, an indicator of landscape value, was assigned according to the frequency of visibility. The weight of each indicator was calculated by considering the value of each item. The weight of distribution of cultural resources is relatively high, while other items were set the same. In case of land use, however, ‘-’ score was given according to the grade. Qualitative indicators, on the other hand, were considered terrain, landscape zone, ownership, intellectual boundary, and land category. The applicability of the proposed process and method was examined by applying the existing methods and criteria used for designating scenic spots. Opinions of subject-matter experts were incorporated in the identification of the indicators and in the result review stage. In the future, it is necessary to apply this method while designating scenic sites so as to establish an objective, scientific designation process.

平和를 爲한 提言

한갑수 세계평화교수협의회 1977 廣場 Vol.1977 No.50

제4분과 : 동물 및 기타 ; 도시 내 습지의 생태 환경 및 평가

한갑수,박정호,윤도현,최원웅 한국환경생태학회 2012 한국환경생태학회 학술대회지 Vol.2012 No.1

번영과 풍요를 위한 21세기 신에너지 정책의 방향

한갑수 한국에너지협의회 2000 에너지協議會報 Vol.51 No.-

우리나라 응급의료기관 평가제도의 개선방안

한갑수,김원영,김수진,정진우,강형구,이철웅,이성우 대한의사협회 2020 대한의사협회지 Vol.63 No.4

In Korea, the national evaluation program for emergency medical centers (EMCs) was introduced in 2003. EMCs in Korea have three levels of emergency centers including regional emergency centers, local emergency centers, and local emergency rooms. The evaluation system assesses the performance of EMCs at all three levels. The role of both regional emergency centers and local emergency centers administer the final treatment for severe emergency patients, although the definition of severe emergency patients is unclear. These factors may aggravate crowding at the emergency department. The national evaluation system aims to reduce the length of stay in the emergency department. However, reduction of the length of stay at emergency department may cause a conflict with the administration of final treatment for critically ill emergency patients owing to a lack of in-hospital beds. Crowding of the emergency department is not a problem of EMCs but that of the health system. In 2019, the Korean Society of Emergency Medicine performed a study to improve the national evaluation program for EMC and the performance of EMC. Here, we have summarized the results.

동해시 7개 습지의 수질과 동식물상

한갑수,박정호 한국습지학회 2014 한국습지학회지 Vol.16 No.4

본 연구에서는 동해시에 분포하는 7개 습지에 대해 수질과 야생동식물의 분포를 조사하고 분석하였다. 조사결과, 대부분습지의 수질은 오염물질의 외부유입에 의해 부영양화 상태로 나타났다. 식물은 총 234분류군으로 69과 168속 207종 24변종 3품종이었으며, 이 중 습생식물은 18종, 수생식물은 43종으로 나타났다. 산림청 지정 희귀·멸종위기식물 2종, 귀화 식물은 27종이 확인되었으며, 도시화 지수와 귀화율은 각각 8.4%, 11.6%로 나타났다. 저서성 대형무척추동물은 총 3문 5강12목 26과 35종이 확인되었고, 희귀종은 3종이 발견되었다. 어류는 총 5과 5종이 서식하였고, 멸종위기 야생생물에 Ⅱ급1종이 발견되었다. 대부분의 습지는 그 면적이 비교적 작고, 일부 습지는 산림 및 하천의 원거리에 고립되어 분포하는 등외부종의 유입 및 유출의 제한이 있었다. 하지만, 특정 종을 포함한 다양한 동식물의 서식이 확인되었으며, 향후 습지 유지 및 기능 제고를 위한 대책이 요구되었다. In this study, we investigated and analysed the water quality, distribution of the vegetation and the wildlife to sevenwetlands in Donghae city. As a result, most of the wetlands was found to be very poor water quality and some specificpollutants from entering the wetland. A total of 234 taxa on vegetation were identified including 207 species, 24 varieties, 3formaes, 168 genera and 69 families. 2 species were recorded as designated rare plant of Korea Forest Service. Thenaturalized plants were 27 species. The urbanization rate of naturalization index was 8.4% and 11.6% respectively. Thenumber of benthic macroinvertebrate taxa was 35 species, 26 families, 12 orders, 5 classes and 3 phylums. Rare specieswere recorded 3 species. Taxa for fishes were 5 family and 5 species. Endangered wildlife was found 1 species. Mostwetlands in Donghae city were the relatively small in size, and some wetlands were separately located from forest and riverecosystems. It was limited inflow and outflow of species into a wetland from the outside. However, various vegetation werefound at whole wetlands and some special species also inhabited. The wetlands performed the role as a habitat of wild life.

Effect of Small Intestinal Submucosa Sponges on the Attachment and Proliferation Behavior of Schwann Cells

한갑수,강길선,고현아,장나금,송정은 한국고분자학회 2014 Macromolecular Research Vol.22 No.12

The aim of the study was to investigate the effects of small intestinal submucosa (SIS) sponges, a naturalbiodegradable polymer scaffold, on the adhesion behavior and the proliferation of Schwann cells (SCs). SIS spongeswere prepared by varying the contents of SIS powders (1%, 2%, and 3% SIS concentration) and SCs were seededon the sponges and incubated to investigate the adhesion and proliferation of SCs. A series of analytical process wasconducted to observe the water absorption rate of sponges and confirmed the proliferation and morphology of SCsby scanning electron microscopy (SEM), 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT)assay, reverse transcription polymerase chain reaction (RT-PCR), and histological evaluation. The best adhesionbehavior and the proliferation of SCs were observed on the sponge with 2% powder content. Also, analysis of messengerribonucleic acid (mRNA) expression using the neuron-specific enolase (NSE) and neurofilament protein (NF)nerve markers showed that SC gene expression was excellent in the 2% SIS sponge. In vivo hematoxylin and eosin(H&E) staining and immunofluorescence results showed that cells and tissue formed well in the pores of spongeswith 2% and 3% SIS powder contents, compared with formation in the 1% SIS sponge. The SIS sponges provided anunsuitable habitat for the adhesion and proliferation of cells in that the pore size was small. In this study, the adhesionbehavior and the proliferation could be changed depending on the pore size and SIS powder content in the sponges. Thus, an appropriate powder content of SIS should be used to prepare SIS sponge scaffolds.

Effect of Pore Sizes of Silk Scaffolds for Cartilage Tissue Engineering

한갑수,강길선,송정은,Nirmalya Tripathy,김형석,문보미,박찬흠 한국고분자학회 2015 Macromolecular Research Vol.23 No.12

The aim of this study was to investigate the effects of silk fibroin scaffold, a natural biodegradable polymer scaffold, on the adhesive and proliferative behaviors of chondrocytes. Various silk fibroin scaffolds were produced using the salt extraction method, and scaffolds with different pore sizes (90-180, 180-250, 250-355, and 355- 425 μm) were constructed based on the size of the salt particles. Chondrocytes were seeded on the scaffolds and incubated. The produced scaffolds were analyzed with Fourier transform-infrared spectroscopy and exhibited characteristics similar to those of natural silk in terms of chemical composition and structure. Moreover, we found that the mechanical strength decreased as the pore size increased. Scanning electron microscopy images confirmed the existence of pores in the silk fibroin scaffold. Additionally, scaffolds with smaller pore sizes facilitated improved cell adhesion. Using MTT analysis, we found that scaffold with pore sizes of 90-180 and 180-250 μm provided the best environment for cell proliferation. The amount levels of sulfated glycosaminoglycan (sGAG) and collagen were highest for scaffolds with a pore size of 90-180 μm. In gene expression analysis, scaffolds with pore sizes of 90-180 and 180-250 μm showed the highest expression of the chondrocytes marker aggrecan and type II collagen. Collectively, these data suggest that silk fibroin scaffolds with smaller pore sizes (90-250 μm) provide the best environment for adhesion and proliferation of chondrocytes.