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.

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.

법률사무 한글전용에 따른 인명, 지명 한글 표기

한갑수 한국사법행정학회 1969 사법행정 Vol.10 No.5

3-D Inverse Dynamics Analysis of the Effect of Maximum Muscle Force Capacities on a Musculoskeletal System

한갑수,김경호 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.5

It is known that muscle strength of human body can alter or deteriorate as aging. In thisstudy, we present an inverse dynamics simulation to investigate the effect of muscle strength onperforming the daily activities. A 3D musculoskeletal model developed in this study includes severalsegments of whole body, long and short muscles, ligaments and disc stiffness. Five daily activitiessuch as standing, flexion, finger tip to floor, standing lift close and lifting flexed were simulated withvarying the maximum muscle force capacities (MFC) of each muscle fascicles from 30 to 90 N/cm2with an increment of 30 N/cm2. In the result, no solution can be obtained for finger tip to floor andlifting flexed with 30 N/cm2. Even though the solution was available for standing lift close activity incase of 30 N/cm² capacity, many of muscle fascicles hit the upper bound of muscle strength whichmeans that it is not physiologically possible to perform the acvities in reality. For lifing flexed, eventhe case of 60 N/cm2 capaciy, represents the moderate healthy people, was not able to find thesolutions, showing that 18 muscles among 258 muscle fascicles reached 100% of muscle capacity. Theestimated results imply that people who have low muscle strength such as elders or rehabilitationpatients were required higher muscle work to perform and maintain the same daily activities thanhealthy one.

호칭과 칭호

한갑수 국어연구소 1989 국어생활 Vol.- No.19

민족의 긍지

韓甲洙 圓光大學校 行政大學院 1995 最高政策管理論集 Vol.7 No.-

홀소리와 닿소리의 문제점

한갑수 서라벌문화예술제작소 1964 예술 서라벌 - 서라벌문화예술제작소 Vol.1 No.1

Muscle Forces and Activation Patterns in the Spine during Spine Stabilization Exercise using a Whole Body Tilt Device

한갑수,권대규,유창호 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

The objective of the study was to investigate the effect of 3-D stabilization exercise using a whole body tilt device. A musculoskeletal(MS) model of the whole body was developed, and used to calculate the forces in the spine, assisted by EMG measurement. Theinverse dynamics was solved using the MS model of the whole body with the input data of the eight different directions of the tilt:anterior (A), posterior (P), anterior right (AR), posterior right (PR), anterior left (AL), posterior left (PL), right (R), and left (L),replicating the tilting directions of the whole body device. The anterior and posterior directions of tilt mainly induced superficial backand front muscle activations, respectively. However, deep muscles, such as the semispinalis and mulifidi, were activated in alldirections of tilt. The joint resultant forces in the right and left direction of tilt were the least; but some higher activations and morediverse recruitments of muscles were demanded. In the present investigation, 3-D stabilization exercise can provide considerablemuscle activation and exercise effect, with the minimum perturbation of structure. Therefore, the proposed direction of tilt can be usedto strengthen the targeted muscles, depending on the patient's muscle conditions.

韓國人乳兒 大動脈에 관한 形能學的 硏究

韓甲洙 부산의대 1964 부산의대잡지 - 부산대학교 의과대학 Vol.4 No.2

제이연화광산(第二蓮花鑛山)의 지질광상(地質鑛床)에 대(對)하여

한갑수,Han, Kab Soo 대한자원환경지질학회 1972 자원환경지질 Vol.5 No.4

The Second Yeon Hwa Mine which belongs to a so called Lead-Zines Belt Area in the central east Korea is located at about 10 km northeast of the Seogpo railway station on Yeongdong Line. The exploitation of the mine started in June, 1969 and furnished the machinary ore dressing plant in November, 1971. The current monthly production of rude ore is 15,000 meteric tons. The results of the study on the lead-zinc-copper deposits of the Second Yeonhwa mine are summerized as follows: (1) main ore deposits of the mine are localized in the Pungchon Limestion formation of Cambrian age, (2) related ingneous rock with ore deposits is granite porphyry, which distributed in NS and $N50^{\circ}W$ trend, (3) ore solution ascended along the $N50^{\circ}W$ trend which represents folding axis and fault plane and mineralized selectively in the limestone formation. (4) high grade ore deposits are localized in concave and convex boundaries of granite porphyry, and hanging walls of shale bed ($P_2S$ shale bed) in Pungchon Limestone formation and (5) skarn minerals are consisted of garnet, hedenbergite, diopside, and sulfide minerals are composed of zincblenede, galena, phyrhotite, pyrite and some amount of chalcopyrite and arsenopyrite.