• Title/Summary/Keyword: restoring

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Performance Evaluation on Journaling File Systems using Iozone Tool in the Linux : Focus on read, write (리눅스에서 Iozone 도구를 이용한 저널링 파일 시스템 성능 평가 : read, write 중심으로)

  • Park, Hong-Jin
    • Journal of Advanced Navigation Technology
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    • v.17 no.1
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    • pp.39-46
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    • 2013
  • If a file system is damaged because of the unusual system close, the system performs the consistency test using fsch and it takes long time. Especially, if it is a big file system, it will take a lot of time. The journaling file system that uses journaling technique, can reduce the restoring time because it uses meta data and it may increase the chance of restoration when restoring. The goal of this paper compared performance evaluation journaling file systems focused on the reading and writing using Iozone tool which is the kernel based benchmarking tool in linux operating system. In this paper, Ex4 which is the current basic Linux file system. is 1.28x faster than XFS file system in terms of file read performance and 1.22x faster than Ext3 file system in terms of file write performance.

Behavior of Shear Yielding Thin Steel Plate Wall with Tib (리브로 보강한 전단 항복형 강판벽의 거동)

  • Yun, Myung Ho;Wi, Ji Eun;Lee, Myung Ho;Oh, Sang Hoon;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.13 no.5
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    • pp.503-511
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    • 2001
  • Structures are designed against earthquakes and reinforced concrete shear walls or steel bracings are usually used as aseismic resistant element. However their hysteretic characteristics in plastic region ductility and capacity of energy absorption are not always good. Besides their stiffness is so rigid that structure designed by static analysis is occasionally disadvantageous. when dynamically analized. Generally a steel plate subjected to shear force has a good deformation capacity Also it has been considered to retain comparative shear strength and stiffness Steel shear wall can be used as lateral load resistant element for seismic design. However there was little knowledge concerning shear force-deformation characteristics of steel plates up to their collapse state In this study a series of shear loading tests of steel plate collapse state. In this study a series of shear loading tests of steel plate surrounded by vertical and horizontal ribs were conducted with the parameters of D/H ratios rib type and the loading patterns. The test result is discussed and analyzed to obtain several restoring characteristics. that is shear force-deformation stiffness and yield strength etc.

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Microbial Diversity in the Soil Damaged by a Forest Fire (훼손된 산불토양의 미생물다양성)

  • Jung, Young-Ryul;Song, In-Geun;Kim, Jin-Yong;Lee, Sin-Geun;Kim, Young-Jun
    • Journal of the Korea Organic Resources Recycling Association
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    • v.13 no.2
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    • pp.85-90
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    • 2005
  • Changes of biochemical and genetic diversity of microbial communities in the soil damaged by a forest fire were analyzed. Soil samples were collected from Gangnung area where a forest fire was broken out in 2000. Two soil samples were from the burnt area, one from the naturally restoring soil (NS) and the other from the artificially restoring soil (AS). A normal, unaffected soil sample (US) was also included as a control. For the biochemical diversity, each sample was directly applied to the BIOLOG system, and the cluster analysis through a statistic process (SPSS) were performed. Genetic diversity was analyzed through DGGE using 16S-rDNA amplified from soil DNA. Among the samples tested, top soils of US and NS, and sub soil of NS revealed more than 70% of the similarity value in biochemical diversity. In case of genetic diversity, however, the similarity value was found to be in the range of 53% to 68% in all samples. This result indicates that the biochemical diversity is not always correlated with the genetic diversity in the analysis of microbial communities.

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Acacia Dominated Area Exclosures Enhance the Carbon Sequestration Potential of Degraded Dryland Forest Ecosystems

  • Halefom, Zenebu;Kebede, Fassil;Fitwi, Ibrahim;Abraha, Zenebe;Gebresamuel, Girmay;Birhane, Emiru
    • Journal of Forest and Environmental Science
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    • v.36 no.1
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    • pp.25-36
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    • 2020
  • Area exclosure is a widely practiced intervention of restoring degraded lands though its impact in sequestering terrestrial and soil carbon is scanty. The study was initiated to investigate the effect of exclosure of different ages on carbon sequestration potential of restoring degraded dryland ecosystems in eastern Tigray, northern Ethiopia. Twelve plots each divided into three layers were randomly selected from 5, 10 and 15 years old exclosures and paired adjacent open grazing land. Tree and shrub biomasses were determined using destructive sampling while herb layer biomass was determined using total harvest. The average total biomass obtained were 13.6, 24.8, 27.1, and 55.5 Mg ha-1 for open grazing, 5 years, 10 years, and 15 years exclosures respectively. The carbon content of plant species ranged between 48 to 53 percent of a dry biomass. The total carbon stored in the 5 years, 10 years and 15 years age exclosures were 39 Mg C ha-1, 46.3 Mg C ha-1, and 64.6 Mg C ha-1 respectively while in the open grazing land the value was 24.7 Mg C ha-1. Carbon stock is age dependent and increases with age. The difference in total carbon content between exclosures and open grazing land varied between 14.3-40 Mg C ha-1. Although it is difficult to extrapolate this result for a longer future, the average annual carbon being sequestered in the oldest exclosure was about 2.7 Mg C ha-1 yr-1. In view of improving degraded area and sequestering carbon, area exclosures are promising options.

Application of Rapid Prototyping Technique and Intraoperative Navigation System for the Repair and Reconstruction of Orbital Wall Fractures

  • Cha, Jong Hyun;Lee, Yong Hae;Ruy, Wan Chul;Roe, Young;Moon, Myung Ho;Jung, Sung Gyun
    • Archives of Craniofacial Surgery
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    • v.17 no.3
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    • pp.146-153
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    • 2016
  • Background: Restoring the orbital cavity in large blow out fractures is a challenge for surgeons due to the anatomical complexity. This study evaluated the clinical outcomes and orbital volume after orbital wall fracture repair using a rapid prototyping (RP) technique and intraoperative navigation system. Methods: This prospective study was conducted on the medical records and radiology records of 12 patients who had undergone a unilateral blow out fracture reconstruction using a RP technique and an intraoperative navigation system from November 2014 to March 2015. The surgical results were assessed by an ophthalmic examination and a comparison of the preoperative and postoperative orbital volume ratio (OVR) values. Results: All patients had a successful treatment outcome without complications. Volumetric analysis revealed a significant decrease in the mean OVR from $1.0952{\pm}0.0662$ (ranging from 0.9917 to 1.2509) preoperatively to $0.9942{\pm}0.0427$ (ranging from 0.9394 to 1.0680) postoperatively. Conclusion: The application of a RP technique for the repair of orbital wall fractures is a useful tool that may help improve the clinical outcomes by understanding the individual anatomy, determining the operability, and restoring the orbital cavity volume through optimal implant positioning along with an intraoperative navigation system.

Application features of The detailed rules of Census (1896) through the change of house Kan numbers in Gyeonpyeong-bang, Jung-seo in Hanseong-bu -Focused on Gyeonpyeong-bang 1-tong to 23-tong in 1903 and 1906- (한성부 중서 견평방에서 가택 칸수의 변화를 통해서 살펴본 「호구조사세칙」(1896)의 적용 양상 -1903년과 1906년의 견평방 1통에서 23통까지를 대상으로-)

  • Cho, Yun-O;Woo, Don-Son
    • Journal of architectural history
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    • v.28 no.6
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    • pp.19-30
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    • 2019
  • This study explores the application aspect of The detailed rules of Census (1896) through the change of Kan numbers in Gyeonpyeong-bang. Although Gyeonpyeong-bang was a high-priority area because of its location, it was difficult to trace the operation of the urban situation due to lack of data. This study is focusing on restoring space and society in the Gyeonpyeong-bang using the information on the type of houses and the number of Kan listed in the family register of Hanseong-bu. The detailed rules of Census sets out provisions for the family registry and the rules of making Tong. Especially when it comes to the rules of making Tong, this rule deals with the code of making ten Hos into one Tong. This study was conducted by dividing the status of the Tong into three types: uncompleted Tong, exceeded Tong without vacant Ho number, and exceeded Tong with the vacant Ho number. Since these three types of Tong are in the process of change towards the complete Tong with 10 Hos, they were thought to be able to demonstrate the specific application of the rules. This study will be meaningful as a case study that expands the point of existing research on the Tong making rules, which was not focused relatively on restoring urban conditions at that time, by looking at the changes in exceptions that deviated from the Sipgajaktong rule.

Fusion Methods of License Plate Detection and Super Resolution for Improving License Plate Recognition (번호판 인식 향상을 위한 번호판 검출과 초해상도 융합 방법)

  • Song, Tae-Yup;Lee, Young-Hyun;Kim, Min-Jae;Ku, Bon-Hwa;Ko, Han-Seok
    • Journal of the Korea Society of Computer and Information
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    • v.16 no.4
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    • pp.53-60
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    • 2011
  • This paper proposes fusion methods of license plate detection and super-resolution for improving license plate recognition in low-resolution images. In the proposed method, we apply the license plate detection based on local structure pattern feature and the sequential super-resolution based on Kalman filter. The proposed fusion methods are divided into two according to whether the license plate is detected or not in the input image : (i) performing license plate detection after restoring whole image through super resolution, and (ii) restoring only the detected region through super-resolution after detecting the license plate. We demonstrated effectiveness of the proposed methods in various environments.

Stimulation of Cell Growth by Erythropoietin in RAW264.7 Cells: Association with AP-1 Activation

  • Seong Seu-Run;Lee Jae-Woong;Lee Yong-Kyoung;Kim Tae-Il;Son Dong-Ju;Moon Dong-Cheol;Yun Young-Won;Yoon Do-Young;Hong Jin-Tae
    • Archives of Pharmacal Research
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    • v.29 no.3
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    • pp.218-223
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    • 2006
  • Erythropoietin (EPO), a hematopoietic factor, is required for normal erythrocyte developments, but it has been demonstrated to have many other functions, and its receptor is localized in other tissues. In the present study, we investigated whether EPO can promote other cell proliferation and possible molecular mechanisms. EPO restored the inhibition of the RAW264.7 and PC12 cell growth by fetal bovine serum (FBS) withdrawal in a dose dependent manner, but not that of other cell types tested. The restoring effect of EPO was completed when the RAW264.7 cells were cultured in the medium containing as low as 3% of FBS, and 10 U/mL EPO could replace FBS. The restoring effect of EPO in the RAW264.7 cells was associated with the increased of c-Fos and c-Jun expression as well as AP-1 activation. These data demonstrate that EPO can stimulate RAW264. 7 cell as well as PC12 cell growth even when the cells were cultured without FBS or in the presence of small amounts of FBS in the medium, and this stimulating effect is associated with the activation of AP-1 transcription factor.

A Study of Restoration Path Tracking Method for Urban Stream (도시하천 복원경로 추적방안에 관한 연구)

  • Lim, Yong-Ho;Um, Jung-Sup
    • Journal of Korea Spatial Information System Society
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    • v.10 no.2
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    • pp.25-33
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    • 2008
  • The aim of this research was to track the appropriate path favorable to urban development when finding small streams which had been destroyed during the process of urbanization and restoring the streams to a natural flow. This research located the targeted streams in the urban area by using GIS, and designated 3 main factors in restoring small streams: altitude, the usage of land, and land prices. After analyzing the possibilities and outcomes of each factor, the study found the most suitable remedy reflecting those 3 factors. Since there are various effects on stream restoration, based on these 3 factors, the study found and used the most viable factor in accordance with its importance. Using this template, the study developed a method to track the most appropriate restoration path. The study results will contribute to finding, and the restoration of disappeared streams for making more pleasant urban life and an environmentally-friendly city.

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A Study of Queen Elizabeth I's Cinema Costumes Viewed from Her Portrait (초상화 복식을 중심으로 본 퀸 엘리자베스 1세의 영화 의상에 관한 연구)

  • Sung, Kwang Sook
    • Journal of the Korean Society of Costume
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    • v.62 no.8
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    • pp.55-70
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    • 2012
  • In 16th century, during renaissance time, Britain's queen Elizabeth I, as a means to express her authority, had an exaggerated clothing styles and was the fashion leader of the time. Thus, through a media of Cinema, tried to find out the characteristics and different aspects of the history of clothing styles, of how they changed, ascertained, restored, and reappeared in the modern time. The research was based on the consideration of Elizabeth I's 33 portraits and her clothing styles; and the research is also from analysing the movies from 1937 to 2007, a total of 9 Cinema and 102 clothes. Movie costumes' most important mission is representing the cinema's timely and spatial background. Thus, it is inevitable that ascertaining and restoring Elizabeth I's portrait should be done. However, the movie costume has to show her dramatic lifestyle, dignity, absolute authority, and other visual images. In addition, the costume has to contribute in making artistic effect and thus the creativity of a designer to satisfy all these needs should be added. Based on the findings from the research, the characteristics of Elizabeth I's Cinema costume are first, ascertaining and restoring portraits, second, mixture of silhouette and detail depending on time period, third, partial change on clothing style design, fourth, emphasis of ruff collar, fifth, magnification colors, sixth, avoiding excessive swelling and decoration, and applying modern style on Protective costume. Thus, based on the research, creative design in Cinema clothing, plays an important part in the history of clothing design. I hope this research could work as a foundation reference for clothing design's history.