• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1919_1920
• /
• 2009

한글 문자 인식에 관한 연구는 통계적 방법과 구조적 방법, 신경 회로망 등 다양한 방법론이 제시되어 왔다. 그러나 한글은 영문이나 숫자에 비해 방대한 문자수와 복잡한 구조로 인하여 인식에 많은 어려움을 가지고 있다. 따라서 본 논문에서는 한글을 가장 단순한 구조인 자음과 모음으로 분리한 뒤 각 개체의 픽셀 분포를 파악하고, 한글의 구조적 특징을 이용하여 자소의 행과 열에서의 peak값과 픽셀의 분포를 그룹으로 나누어 한글을 인식하는 방법을 제시한다.

• Proceedings of the Korea Society of Information Technology Applications Conference
• /
• 2002.11a
• /
• pp.468-478
• /
• 2002

고품질의 영상 압축기인 JPEG2000의 기본 압축 코덱인 EBCOT(Embedded Block Coding With Optimized Truncation)를 설계하였다. 영상 압축기에서 Context 추출 구현을 위하여 코드블록(Code block)으로 분할하고, 비트플랜(Bit-Plane)코딩을 했으며, 3가지 패스 그룹으로 분리한 후 ZC, RLC, MR, SC를 하였다. 산술부호화는 덧셈 연산과 쉬프트 연산만을 사용하는 MQ-coder를 사용하였으며, Context들의 누적 확률을 추정하여 테이블을 작성하였고, 압축데이터를 산출하였다. 영상 압축을 위한 엔트로피 코더의 하드웨어 구현은 VHDL를 이용하여 설계를 하고, Synopsys사의 논리 회로 합성 도구를 사용하여 합성을 하였으며, Altera사의 FLEX 10K250 Device를 이용하여 FPGA로 구현하였다.

• Proceedings of the Korea Society for Industrial Systems Conference
• /
• 2002.11a
• /
• pp.468-478
• /
• 2002

고품질의 영상 압축기인 JPEG2000의 기본 압축 코덱인 EBCOT(Embedded Block Coding With Optimized Truncation)를 설계하였다. 영상 압축기에서 Context 추출 구현을 위하여 코드블록(Code block)으로 분할하고, 비트플랜(Bit-Plane)코딩을 했으며, 3가지 패스 그룹으로 분리한 후 ZC, RLC, MR, SC를 하였다. 산술부호화는 덧셈 연산과 쉬프트 연산만을 사용하는 MQ-coder를 사용하였으며, Context들의 누적 확률을 추정하여 테이블을 작성하였고, 압축데이터를 산출하였다. 영상 압축을 위한 엔트로피 코더의 하드웨어 구현은 VHDL를 이용하여 설계를 하고, Synopsys사의 논리 회로 합성 도구를 사용하여 합성을 하였으며, Altera사의 FLEX 10K250 Device를 이용하여 FPGA로 구현하였다.

• The Magazine for Energy Service Companies
• /
• s.70
• /
• pp.44-47
• /
• 2011

종합적인 에너지 엔지니어링 기업으로 발전하고 있는 GS네오텍(주). 금성통신공사로 시작해 LG기공(주)로 상호가 변경되었다가 2005년도에 LG와 GS가 계열이 분리되면서 GS네오텍(주)가 되었다. GS네오텍은 설립된 지 37년을 맞는 회사로 정보통신, 플랜트, 기전분야, 환경, 에너지 등 다방면의 분야에서 두각을 나타내고 있다. 또한 2002년 ESCO에 등록해 GS그룹 내에서 가장 많은 ESCO 사업 경험을 쌓아오고 있다. 그들이 ESCO사업팀을 재정비해 제2의 도약을 꿈꾸고 있다.

• Journal of KIISE:Computing Practices and Letters
• /
• v.5 no.2
• /
• pp.283-294
• /
• 1999

병행적 프로그램 개발을 위한 Java 언어의 기능은 저수준의 기능으로 프로그래밍이 불편하고 오류를 범할 가능성이 높다. 본 논문에서는 병렬 알고리즘에서 빈번히 활용되는 세마포어, 여러 유형의 버퍼와 버퍼그룹, 베리어 작업 영역등의 동기화 제어구조를 클래스 라이브러리의 형태로 개발하였다. 이 라이브러리를 활용하면 동기화 기능의 구현에 관한 복잡한 내용이 제어구조 클래스에 효과적으로 은폐되고, 병렬 알고리즘의 구조와 이를 구현하기 위한 제어가 분리될 수 있다. 단일 목적의 동기화 기능을 위하여 복수 구현이 제공되므로 알고리즘의 구조를 수정하지 않으면서도 보다 적절한 구현을 선택하도록 프로그램을 변경할수도 있다.

• Journal of KIISE:Information Networking
• /
• v.32 no.5
• /
• pp.593-602
• /
• 2005

Overlay multicast delivery method is a new approach in which multicast functionality is implemented at the end-hosts application layer in the timing of sparse deployment of IP multicast. However, existing overlay multicast protocols are not being standardization and many restrictions occur when delivering high capacity contents. Therefore, new delivery mechanism is required for the overlay multicast based high capacity contents delivery. In this paper. we separate group management and delivery management of overlay multicast and describe a capable group management. We also defined high speed delivery method better than that of existing overlay multicast through use of collaborated distribute downloading. This improved efficiency of massive contents transmission.

• Journal of Digital Contents Society
• /
• v.15 no.3
• /
• pp.395-403
• /
• 2014

Recently webhard services in various applications have been notably increased. In order to adopt some webhard functions into the existing application platform, however, a lot of manpower and cost is necessary. In this paper, we propose webhard API based on cloud storage for building and extending the webhard functions. The proposed system consists of three layers: application, web-hard server, and storage server in which each layer provides its API independently. It is enable the developer to easily extend the webhard functions to the application by using only HTTP request, which provides no limitation of the programming language. Because our webhard API is running on the virtualized cloud storage, it is possible to easily extend the storages and to reduce the maintenance cost. In this paper, we implement all the webhard API and then show the result of adopting the API to a prototype groupware system.

• Journal of Applied Biological Chemistry
• /
• v.62 no.3
• /
• pp.287-292
• /
• 2019

Pseudomonas tolaasii causes brown blotch disease on the oyster mushroom (Pleurotus ostreatus). Various pathogenic strains of P. tolaasii were isolated and divided into three subtypes, $P1{\alpha}$, $P1{\beta}$, and $P1{\gamma}$. For phage therapy, bacteriophages against to these subtype strains were applied to mushroom cultivation and very successful to prevent from the disease. In this study, bacteriophages were isolated against the representative strains of subtype pathogens and their polyclonal antibodies were synthesized to investigate structural relationship among capsid proteins of phages. Phage preparations over $10^{10}pfu/mL$ were injected to rabbit thigh muscle and polyclonal antibodies were obtained after three times of boost injection. Titers of the antibodies obtained were over $2{\times}10^7Ab/mL$ for the phage ${\phi}6264$, $1{\times}10^6Ab/mL$ for the phage ${\phi}HK2$, and $1{\times}10^7Ab/mL$ for the phage ${\phi}HK19$ and phage ${\phi}HK23$. High specific activities were observed between antibodies and the corresponding bacteriophages. Some cross-reactivities between the antibodies and non-corresponding bacteriophages were also measured. Antibody $Ab{\phi}6264$ inactivated all phages of $P1{\alpha}$ subtype and only phage ${\phi}HK16$ among $P1{\beta}$ subtype phages. Antibody $Ab{\phi}HK23$ of $P1{\gamma}$ subtype neutralized all phages of $P1{\beta}$ subtype as well as the phage ${\phi}HK23$, showing the widest phage-inactivation range. When the structural-similarity studies of phages were investigated by using phage antibodies, closeness obtained by phylogenetic analysis of 16S rRNA genes of pathogenic strains were quite different from that of polyclonal antibody-specific structural similarity of phage capsid proteins. In conclusion, there is weak correlation between the host strain specificity of bacteriophage and its capsid structural similarity measured by phage antibodies.

• Korean Journal of Environment and Ecology
• /
• v.29 no.3
• /
• pp.441-453
• /
• 2015

In this paper, according to the illuminance at night with artificial lighting in downtown Seoul, trees flowering and leaf growth rate was performed as a case study to examine whether there is a difference. The illuminance was measured at 78 points on a total of 26 points, the range of illuminance were divided into three groups considering land use, Group A (plots 1-7) were 4.90 ~ 112.50 lx, Group B (plots 8 to 18) were 0.45 ~ 42.40 lx, group C (plots 19 to 26) were 0.28 ~ 22.10 lx. According to the One-way ANOVA on illuminance difference, the survey groups were classified into three groups. To survey the ratio of the flowering Prunus yedoensis and Rhododendron spp. and to survey the ratio of leaf growth Zelkova serrata, Ginkgo biloba, and Acer palmatum each 30 individuals were investigated. Rhododendron spp. to study the ratio of the flowering and Acer palmatum to study the ratio of leaf growth were determined to be useful as indicator woody species according to the correlation. The higher illuminance of night lighting is, the faster flowering and leaf growth of trees will be by correlation between the mean illuminance of each group and the flowering and leaf growth of trees. In the future, should be made a more detailed study of how much affect to the trees with some impact on the level of light pollution at night lighting.

• 한국체육학회지인문사회과학편
• /
• v.51 no.3
• /
• pp.437-445
• /
• 2012

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and manganese superoxide dismutase (MnSOD) has been hypothesized as a mediator in the activation of multiple pathways implicated in the pathogenesis of diabetic disease. The objective of this study was to understand the mechanism that aerobic exercise activate GAPDH and MnSOD in pancreatic cells. To achieve the purpose of this study, thirty male Sprague-Dawley rats were assigned to control group, diabetic group and diabetic exercise group. 10 rats were forced to exercise according to exercise protocol for 8weeks and 20 rats were untrained for control and diabetic group. Pancreatic tissue were extracted from the each. Expressions of GAPDH and MnSOD in diabetic pancreatic tissues were significantly decreased compare to control group. However, swimming (trained diabetic group) significantly increased expressions of GAPDH and MnSOD compare to diabetic group, respectively. In hyperglycemia, GAPDH and MnSOD in pancreatic cells is activated by aerobic exercise, and this inactivates multiple pathways implicated in the pathogenesis of diabetic disease. In conclusion, these findings suggest that increased activity of GAPDH and MnSOD by exercise have beneficial effects on mitochondrial dysfunction and arresting the progression of diabetic disease.