• Restorative Dentistry and Endodontics
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• v.23 no.1
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• pp.94-109
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• 1998

The purpose of this study was to evaluate the effect of materials and sizes of files on canal transportation in a curved canal. The stress and the strain energy of files of two kinds of materials (stainless steel and NiTi) and five sizes (No. 20, 25, 30, 35 and 40) in a curved canal were analyzed by a finite element program, NASTRAN. Curved canals in transparent resin blocks were instrumented with the 10 kinds of files, and the degree of canal transportation obtained by double exposure technique of photography was compared with the analysis by the finite element method. The results were as follows : 1. The stress of a file in a curved canal increased from the file body to the file tip. 2. The stress of a stainless steel file was about 2.5 times greater than that of a same-sized NiTi file. 3. The stress distributions of files of an identical material were the same, and the strain energies of files of an identical material increased as the size of files increased. 4. The strain energy of a No. 35 NiTi file was about the same as that of a No. 20 stainless steel file. 5. The degree of canal transportation by a stainless steel file was greater than that by a same-sized NiTi file. The degree of canal transportation generally increased as the size of a file increased. 6. The degree of canal transportation of a No. 35 NiTi file was about the same as that of a No. 20 stainless steel file.

• Journal of Radiation Industry
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• v.10 no.4
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• pp.249-255
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• 2016

This study, Seoul City shelter, you are trying to seek medical cooperation and cure rate increase proposal Yu findings's current situation and tuberculosis of homeless tuberculosis. Inspector, and has a total 591 people is targeted to implement an interview after acquiring utilization agreement in studies conducted chest X-ray photography. Of the interview questions, three or more protons, it is determined that the TB symptomatic conducted sputum examination, chest X-ray examination confirms the physician radiology, when sputum examination primarily chromatic findings the double implemented and conducted by requesting the ship inspection also said inspection sputum acid-fast bacteria if it is true one, respectively. confirmed case result of checking whether there is a difference due to risk factors(Jb) at the chi square black, it was found that there is no statistically significant difference at 95% confidence level. (${\chi}^2=0.276$, p>0.05), suspected case (Ac, Ae) results of examining whether there is a difference due to risk factors in chi square black, that there is a statistically significant difference at 99% confidence level is I found (${\chi}^2=9.414$, p<0.01). The nature of the homeless tuberculosis screening and directed to the distance homeless specific location are likely to evaluate the actual incidence low and aggressive or management needs, the rationale is allowed insufficient reality is. Through this research, future, for tuberculosis high risk tuberculosis patient, such as homeless to expand the tuberculosis screening of infectious tuberculosis patients in private medical institutions, and one-stop service that chest X-ray examination and sputum examination is carried out at the same time introduced immediately to prevent the inspection and examination, cure, and should establish a foundation that can be up to post administration.

• Korean Journal of Remote Sensing
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• v.19 no.4
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• pp.291-305
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• 2003

The cost of deploying Geological and Environmental information gathering systems, especially when such systems obtain remote sensing and photographic data through the use of commercial satellites and aircraft. Besides the high cost equipment required, adverse weather conditions can further restrict a researcher's ability to collect data anywhere and anytime. To mitigate this problem, we have developed a compact, multi-spectral automatic Aerial photographic system. This system's Multi-spectral camera is capable of the visible (RGB) and infrared (NIR) bands (3032*2008 pixel). It consists of a thermal infrared camera and automatic balance control, and can be managed by a palm-top computer. Other features includes a camera gimbal system, GPS receiver, weather sensor among others. We have evaluated the efficiency of this system in several field tests at the following locations: Kyongsang-bukdo beach, Nakdong river (at each site of mulkeum-namji and koryung-gumi), and Kyungahn River. Its tested ability in aerial photography, weather data, as well as GPS data acquisition demonstrates its flexibility as a tool for environmental data monitoring.

• Korean Journal of Remote Sensing
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• v.20 no.5
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• pp.337-351
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• 2004

Our laboratory originally developed the compact, multi-spectral, automatic aerial photographic system PKNU3 to allow greater flexibility in geological and environmental data collection. We are currently developing the PKNU3 system, which consists of a color-infrared spectral camera capable of simultaneous photography in the visible and near-infrared bands; a thermal infrared camera; two computers, each with an 80-gigabyte memory capacity for storing images; an MPEG board that can compress and transfer data to the computers in real-time; and the capability of using a helicopter platform. Before actual aerial photographic testing of the PKNU3, we experimented with each sensor. We analyzed the lens distortion, the sensitivity of the CCD in each band, and the thermal response of the thermal infrared sensor before the aerial photographing. As of September 2004, the PKNU3 development schedule has reached the second phase of testing. As the result of two aerial photographic tests, R, G, B and IR images were taken simultaneously; and images with an overlap rate of 70% using the automatic 1-s interval data recording time could be obtained by PKNU3. Further study is warranted to enhance the system with the addition of gyroscopic and IMU units. We evaluated the PKNU 3 system as a method of environmental remote sensing by comparing each chlorophyll image derived from PKNU 3 photographs. This appraisement was backed up with existing study that resulted in a modest improvement in the linear fit between the measures of chlorophyll and the RVI, NDVI and SAVI images stem from photographs taken by Duncantech MS 3100 which has same spectral configuration with MS 4000 used in PKNU3 system.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.411-417
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• 2019

The Korea Convergence Society. The main purpose of this study is to analyze and categorize Art Infusion, and to examine the effects of consumers' advertising on attitude and memory information. As a result, first, there were no statistical differences according to the type of recall according to the way of using famous paintings. However, the product diagnosis and advertisement diagnosticity according to the way of using the famous paintings showed positive evaluation in the reinterpreted famous paintings. Second, in the case of recalls according to the frequency of exposure to famous paintings, the exposure of famous painting advertisements was higher than that of the highly exposed painting advertisements. Third, when comparing the interaction effect on the recall of advertisements, the high-exposure advertisements reinterpreted by the camera showed the highest recall. The results of this study are expected to contribute to strategic measures that can positively change consumer memory and attitudes according to the way of using famous paintings.

• Journal of the Korean Society of Propulsion Engineers
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• v.4 no.4
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• pp.78-86
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• 2000

The objective of this research is to understand the characteristics of a nonpremixed, turbulent, hydrogen jet flame which is stabilized in Mach 1.8 coflowing air flows. In order to investigate the flame structure, flame lengths and fuel trajectories were measured by using direct photography, acetone PLIF, Mie scattering techniques, and numerical simulation. Effect of increasing air velocity was investigated when fuel velocity is fixed. The subsonic flame length was decreased drastically, however the supersonic flame length was increased slowly Then the change of flame blow out characteristics was observed as varying fuel nozzle lip thickness. The flame stability can be increased when fuel nozzle lip thickness was increased, which indicates that the minimum fuel lip thickness ratio is required for the stable supersonic flames. Also, it is found that fuel jet is blocked by high pressure zone and low scattering zone is made. Then the fuel that was moving along the recirculation zone had longer residence time within the supersonic flames, which made partially premixed zone.

• Journal of the Korean Society of Propulsion Engineers
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• v.20 no.4
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• pp.68-76
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• 2016

This research is carried out for the performance evaluation of the injector that is one of the critical components of bipropellant-rocket-engine. Spray characteristics are investigated in detail according to the recess length and injection pressure on the swirl-coaxial-injector using gaseous methane and liquid oxygen as propellants. A visualization is conducted by the Schlieren photography that is composed of a light source, concave mirrors, knife, and high-speed-camera. A hollow-cone-shape is identified in the liquid spray that is spread only by inner injector and the spray angle is decreased due to the diminution of swirl strength in accordance with the increase of the length of injector orifice. When the injector sprays the liquid through the inner injector with the aid of gas through the outer injector, the spray angle in external mixing region tends to increase with rise of the recess length, while in internal mixing region, it is decreased. It is also confirmed that the same tendency of the spray angle with recess length appears irrespective of the injection pressure of liquid spray.

• Journal of the Korea Society of Computer and Information
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• v.15 no.9
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• pp.25-33
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• 2010

We propose a retouching method that converts a general photography to a watercolor painting image using bilateral filtering and mean shift segmentation which are mostly used in image processing. The first step is to weaken high frequency components of the image, while preserving the edge of image using the bilateral filtering. And after that we perform DoG(Difference of Gradient) edge extraction and mean shift segmentation respectively from the bilateral filtered image. The DoG edge extraction is performed using luminance component of the image whose RGB color space is transformed into CIELAB space. Experimental result shows that our method can be applied to various types of image and bring better result, especially against the photo taken in daylight.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.28 no.3
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• pp.101-113
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• 2015

Objectives : Microneedle therapy and Subcision are commonly used for therapeutic modalities of acne scars in Korean medicine. Beevenom could promote the expression of various cytokines, enzymes and receptors related to increasing collagen content of connective tissues. Through this mechanism, we considered that Beevenom pharmacopuncture therapy is applicable to the treatment of acne scars. We investigated twenty-seven patients with acne scars treated by Microneedle therapy and Subcision combined with Beevenom pharmacopuncture therapy and evaluated the clinical effect.Methods : Twenty-seven patients with acne scars were treated by Microneedle therapy and Subcision combined with Beevenom pharmacopuncture therapy and evaluated the clinical effect. for twelve weeks. The severity of acne scars and treatment effect were evaluate by standardized photography, GASC, ECCA scale and patient`s satisfaction. And side effects was also checked.Results : After twelve weeks for treatment, there was an improvement in GASC, ECCA scale. 77.8% of patient replied excellent or good on patient satisfaction survey. One patient sufferied from pruritus, papules and comedones as side effect of treatment.Conclusion : It can be considered that Microneedle, Subcision, Beevenom pharmacopuncture combining therapy are effective method for treating acne scars.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.28 no.3
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• pp.114-125
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• 2015

Objectives : The objective of this study was to evaluate the effect of Herbal medicine, extrusion and Hwangryunhaedok-tang Pharmacopuncture therapy for treating Sil-Yol(Excess heat) type acne.Methods : Total of 22 patients with Sil-Yol(Excess heat) type acne were treated with the Herbal medicine(Chungsangbangpoong-tang, Yangkyuksanwha-tang, Hwalhyeolsano-tang, Galgeunhaegi-tang, Daeshihotang) and weekly Hwangryunhaedok-tang Pharmacopuncture & extrusion therpay. By the standardized photography before and after treatment, KASG and survey for patient`s satisfaction, we checked effect of Herbal medicine and Hwangryunhaedok-tang Pharmacopuncture therapy for treating acne.Results : 1. In 22 patients who underwent the Herbal medicine, extrusion and Hwangryunhaedok-tang Pharmacopuncture therapy, there was an significant improvement in KASG. Mean value of KAGS before treatment is 3.59±0.80, mean value of KAGS after treatment is 1.95±65.2. The responses to the survey for satisfaction revealed that 5 patients were very satisfied with their outcomes, 11 patients were satisfied, 5 patients were somewhat satisfied, 1 patient was dissatisfied.Conclusion : In Korean medicine, Herbal medicine and Hwangryunhaedok-tang Pharmacopuncture therpay might be effective method for treating Sil-Yol(Excess heat) type acne.