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12M의 고해상도 360° 카메라를 사용한 주차장의 14면 주차 상태 판단 프로그램
이영지(Young-Ji Lee),이희열(Hee-Yeol Lee),고태영(Tae-Young Ko),곽동훈(Dong-Hoon Kwak),김재형(Jae-Hyung Kim),김주호(Joo-Ho Kim),오승진,이태윤(Tae-Yoon Lee),박상민(Sang-Min Park),이승호(Seung-Ho Lee) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6
In this paper, we propose a program to identify 14 parking status in a parking lot using a high resolution 360° camera of 12M. The proposed program consists of three steps: Match with plane image, parking area detection algorithm, and discrimination of parking using learning method. Tests on a model car to evaluate the program to identify 14 parking status in a parking lot using a high-resolution 360° camera of 12M showed 100% accuracy for both parking and double parking. Therefore, the effectiveness of a program to identify 14 parking status in a parking lot using a high-resolution 360° camera of 12M proposed in this paper has been proved.
( Tae Hwan Ha ),( Tae Hoon Oh ),( Sung In Yu ),( Min Kim ),( Jong Wook Kim ),( Won Ki Bae ),( Jae Hyung Kim ),( Seung Suk Baek ),( Mi Jin Ryu ),( Ye Na Choi ),( Ji Young Park ),( Eileen L Yoon ),( Tae 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Non-variceal upper GI bleeding (NVUGIB) is a common medical problem that has signifi cant association with morbidity and mortality. Angiographic detection and subsequent transarterial embolization (TAE) is a primary treatment option when medical and endoscopic treatments fail. We investigated clinical factors that could affect the success of the angiographic detection and prognosis after TAE in patients with NVUGIB refractory to endoscopic therapy. Methods: A retrospective analysis of the clinical data was done in patients with failed endoscopic treatment who underwent angiography for the treatment of acute NVUGIB between May 2002 and May 2013. Patients were divided into detection or non-detection groups according to the presence of bleeding stigmata in angiographic fi nding. Rebleeding defi ned as subsequent bleeding event within 7 days and mortality within 30days were analyzed as outcome parameters after TAE following detection in angiography. Results: A total 45 patients 37 (male, mean age, 65.9±14.9 years) were analyzed and classifi ed as a detection group (n=25, 55.5%) and non-detection group (n=20, 44.6%). Peptic ulcers were the most common cause of refractory NVUGIB. Larger transfusion amount (5.7±3.9 unit vs. 3.5±2.8 unit; P=0.03), prolonged aPTT level (34.2±17.3 sec vs. 21.8±13.8 sec; P=0.01) and short time interval between last endoscopy and angiography (17.5±25.9 hours vs. 34.3±59.5 hours; P=0.04) were found to be signifi cant factors for predicting angiographic detection. TAE was performed in all patients detected in angiography. Rebleeding (44%) was significantly associated with higher Rockall score (8.3±1.5 vs. 6.6±2.4; P=0.046) and mortality (12%) was signifi cantly associated with higher Rockall score (9.3±0.6 vs. 7.1±2.2; P=0.002) and higher level of BUN (55.3±47.4 vs. 27.6±17.4; P=0.01). Conclusions: Clinical characteristics associated with angiographic detection in patients with NVUGIB refractory to endoscopic therapy were severe bleeding, bleeding tendency and early angiographic intervention. The Rockall score is useful parameter for predicting rebleeding and mortality after TAE.
Insulation Coating of Fe–Si–Cr Soft Magnetic Powder by Selective Oxidation
Jae‑Young Park,Kwangsuk Park,Bosung Seo,Julien O. Fadonougbo,Tae‑Wook Na,Ki Beom Park,Hyeon‑Tae Im,Nong‑Moon Hwang,Hyung‑Ki Park 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7
This study examines the insulation coating technology of Fe–Si–Cr powder via selective oxidation annealing, which oxidizeselements selectively by controlling the oxidation potential. The study calculated the oxidation driving force of Fe, Si, andCr, and conducted a thermodynamic analysis of oxidation and reduction conditions according to temperature and oxidationpotential. Based on the results, a selective oxidation annealing was performed in an atmosphere in which Fe is reduced andonly Si and Cr are selectively oxidized. The oxidation potential was controlled through the partial pressure ratio of hydrogenand water vapor. The XPS analysis results confirmed that a Si and Cr complex oxide layer formed on the powder surfaceafter the selective oxidation annealing. Afterward, withstanding voltages were analyzed to evaluate the insulation property. Then, the withstanding voltage of the powder applying the selective oxidation annealing increased significantly comparedto that of the initial powder. Further analysis showed that the powder annealed in an air atmosphere had a significantly lowersaturation magnetic flux density than the initial powder, while the powder applying the selective oxidation annealing hadonly a slightly reduced saturation magnetic flux density.
Hyung‑Ki Park,Min‑Soo Han,Chang‑Hwan Chang,Jong‑Tae Park,박창수,Hyung‑Don Joo 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.3
The effect of the phosphate component on the thermal stability of tension coatings was investigated with a focus on thecrystallization behavior of amorphous silica in the tension coating. After stress-relief annealing, core loss of samples coatedwith a Mg-phosphate was improved, while that coated with an Al-phosphate was deteriorated. The domain wall spacing ofthe samples coated with Mg- and Al-phosphates was respectively increased and decreased after stress relief annealing. Thismeans that the stress relief annealing did not much diminish the tensile stress for Mg-phosphate coating but much diminishedthe tensile stress for Al-phosphate coating. Based on FTIR and XRD results, we found that the crystallization temperatureof silica with Al-phosphate was lower than that of silica with Mg-phosphate. The crystallization of silica was accompaniedby an abrupt volume change, which formed cracks in the tension coating and deteriorated the tensile stress.
Effect of Asymmetric Hot Rolling on the Texture Evolution of Fe–3%Si Steel
Tae‑Wook Na,Hyung‑Ki Park,박창수,Hyung‑Don Joo,Jong‑Tae Park,Heung Nam Han,Nong‑Moon Hwang 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
In Fe–3%Si steel, the hot rolling process affects not only the hot rolling texture but also the primary recrystallization texture. Here, the effect of asymmetric hot rolling was studied by comparing the difference in the texture evolved between asymmetricand symmetric hot rolling. The effect of asymmetric hot rolling on the texture of primary recrystallized Fe–3%Si steel wasalso studied. The symmetric hot rolling of Fe–3%Si steel produces a rotated cube texture at the center but Goss and coppertextures near the surface. Asymmetric hot rolling tends to produce Goss and copper textures even at the center like thetexture near the surface. After primary recrystallization, the dominant texture at the center changes from {001} <210> to{111} <112> and the new texture has a higher fraction of the grains which make the low energy boundary with Goss grainsthan that of symmetric hot rolling.
혈중 및 호기 일산화탄소를 이용한 일산화탄소 헤모글로빈 농도간의 관련성 연구
김형수,박태혁,손지언,정갑열,김정만,김준연 동아대학교 2001 大學院論文集 Vol.26 No.-
This study was conducted to find a correlation between blood COHb and calculated COHb with expiratory air and related variables such as occupational and smoking factors. Author selected 69 healthy workers in 8 workplaces suspected CO exposure. Basic informations were collected by self-reported questionnaire and medical history taking. Author measured Indirect COHb concentration with expiratory air using Micro II-Smokerlyzer and blood COHb concentration using Oxymeter. The results of the study were summarized as follows : 1. In the smoker, mean blood COHb and calculated COHb with expiratory air were 2.21±0.98% and 2.27±0.97 %, and there was not a statistically significant difference. In the non-smoker, mean blood COHb and calculated COHb with expiratory air were 0.42±0.43 % and 0,65±0.30 %, and there was also not a statistically significant difference. 2. There were positive correlations between blood COHb and calculated COHb with expiratory air in both the smoker (r=0.91, p=0.0001) and non-smoker (r=0.73, p=0.0001). 3. In the smoker, the factors affected COHb were total smoking index (Pack × years) and passed time after the last smoking. 4. In the nonsmoker, the parking and driving groups had higher COHb concentration than others (p<0.05). In conclusion, there was no significant difference between indirect COHb concentration with expiratory air using Smokerlyzer and blood COHb concentration and there was a highly significant correlation between indirect and blood COHb concentrations. Therefore indirect COHb concentration with expiratory air is a useful screening method for CO exposure. Author suggest the resection of smoking during at least 90 minutes before measuring COHb concentration in order to exclude smoking effects.
이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-
An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.
박재현,우보명,김우룡,안현철,조현서,추갑철,김춘식,최형태,Park, Jae-Hyeon,Woo, Bo-Myeong,Kim, Oue-Ryong,Ahn, Hyun-Chul,Cho, Hyun-Seo,Choo, Gab-Chul,Kim, Choon-Sig,Choi, Hyung-Tae 한국환경복원기술학회 2001 한국환경복원기술학회지 Vol.4 No.3
This study was conducted to investigate physicochemical property changes from July 1998 to August 2001 in Mt. Bukhansan National Park. Four water sampling points were selected to measure the quality of stream water in the northeastern part of the Mt. Bukhansan National Park. The results were summarized as follows; In spring, the average pH of stream water was below the first class of the river water quality standard, while it was normal level in summer. The average electrical conductivity was about 2.3~3.3 times higher in downstream water than in upstream water during spring and summer. The contents of anions($Cl^-$, $NO{_3}^-$, $SO{_4}^{2-}$) were about 1.1~7.4 and 0.4~11.4 times higher in downstream than in upstream water, respectively. These results indicate that water quality was poorer in downstream than in upstream water. We suggest that stream water in the Mt. Bukhansan National Park should be protected from impacts of snow melting mineral particles in spring season and human impacts like wastewater of point source in summer season.
소비자-브랜드 관계가 확장된 브랜드 평가에 미치는 영향
박은아,김태형,성영신,강정석 한국소비자학회 2004 소비자학연구 Vol.15 No.4
본 연구에서는 소비자-브랜드 관계(BRQ)가 확장된 브랜드 평가에 미치는 영향력을 알아보고, 또한 소비자-브랜드 관계의 강도에 따라 확장된 브랜드에 대한 평가시에 적정한 불일치성 효과(MIE)가 나타나는지 검증하고자 하였다. 연구 결과 소비자-브랜드 관계 강도에 따라 확장된 브랜드에 대한 태도와 구매의도는 다른 것으로 나타났으며, BRQ의 여섯 개 하위차원 중에서 확장된 브랜드 평가에 직접 영향을 미치는 것은 관계의 질 차원과 사랑과 열정 차원인 것으로 분석되었다. 한편, BRQ가 높은 집단에서 확장된 브랜드에 대한 적정한 불일치성 효과는 나타나지 않았으며 속성 유사성 효과도 나타나지 않았다. 반면 BRQ가 낮은 집단에서는 기존의 연구들과 마찬가지로 속성 유사성에 따라 확장된 브랜드에 대한 평가가 다른 것으로 분석되었다. 본 연구의 결과는 확장된 브랜드에 대한 평가에는 기존 브랜드와의 BRQ가 중요하며, 관계가 강할 때에는 속성 유사성 정도에 관계없이 확장 브랜드에 대해 호의적인 평가가 일어날 수 있음을 시사하고 있다. We examined how consumer-brand relationship affects the evaluation of extended brands. Specifically, we investigated the effect of the sub-dimensions of consumer- brand relationship quality (BRQ) on the evaluation of extended brands and the existence of moderate incongruity effect (MIE) in high BRQ consumers. The results shows that the BRQ sub-dimensions have different effects to the attitude toward the extended brand and purchase intention to the extended brands. We tested MIE in high BRQ consumers, the result did not support of moderate incongruity effect in brand extension. It means that strong BRQ consumers evaluate positive to the extended brands regardless of the degrees of the product attribute similarities. For the weak BRQ consumers, the product attribute similarities with parent brands affect their attitudes and purchase intentions of extended brands in the same result of the previous study. These results showed that the strong consumer-brand relationship is key important factor to the favorable evaluations to the brand extensions. Finally, theoretical and practical implications and limitations of this study were discussed.