신경망을 이용한 뉴스영상의 문자영역 추출

정기영(Ki-Young Jeong),정기철(Keechul Jung),김항준(Hang Joon Kim) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.1B

기존의 멀티미디어 검색 시스템에서 저장과 검색 과정은 비교적 자동화되었으나 색인 과정은 수작업에 의존하는 비중이 크다. 다른 영상물에 비하여 뉴스비디오는 문자 정보를 많이 포함하고 있는데, 내포된 문자 정보는 색인에 필요한 유용한 정보를 제공한다. 본 논문은 뉴스 비디오 프레임으로부터 문자 영역을 추출하는 방법을 제안한다. 다층 퍼셉트론(multi-layer perceptron)을 이용하여 프레임 내의 모든 화소를 문자와 비문자 화소로 분류하고, 분할 결과로 얻은 영상을 평활화(smoothing)하고 히스토그램 분석을 수행하여 문자 영역을 구한다. 입력 비디오 영상에서 105개의 키 프레임을 추출하여 문자 영역 추출 방법을 실험하였다.

중소기업에서 변혁적 리더십이 혁신행동에 미치는 영향에 관한 연구 -심리적 주인의식의 매개효과-

정기영 ( Ki Young Jeong ),정현우 ( Hyun Woo Jung ),류태모 ( Tae Mo Ryu ) 한국인적자원관리학회 2015 인적자원관리연구 Vol.22 No.1

This study recognizes the limitation of previous literature regarding transformational leadership, psychological ownership, and innovative behavior and develops the research model and hypothetical relationships. The purpose of this study is to investigate the effects of transformational leadership on psychological ownership and innovative behavior and test the mediation effect of psychological ownership on the relationship between transformational leadership and innovative behavior. The suggested hypothetical relationships were tested with primary data from a sample 338 employees of small and medium-sized enterprises. The main findings of this study are as follows: first, it is found that charisma, intellectual stimulation, individualized consideration dimension of transformational leadership have positive impact on psychological ownership. Second, charisma, intellectual stimulation, individualized consideration dimension of transformational leadership and psychological ownership have positive impact on the innovative behavior. Third, psychological ownership mediated the relationship of transformational leadership and innovative behavior. Thus, the hypothesis on the mediating role of psychological ownership was supported. This study contributes to the understanding of innovative behavior research by developing an theoretical model, incorporating the role of transformational leadership(charisma, intellectual stimulation, individualized consideration) and psychological ownership. In conclusion, this study suggests that in the small and medium-sized enterprises developing innovative behavior, transformational leadership of leader and improving psychological ownership of employees need to be considered to adopt.

2009년 봄철 황사 단일 입자의 광물학 및 혼합상태

정기영 ( Gi Young Jeong ),최호정 ( Ho Jeong Choi ),권석기 ( Seok Ki Kwon ) 한국광물학회 2011 광물과 암석 (J.Miner.Soc.Korea) Vol.24 No.3

2009년 3월 17일 채집된 황사 총시료(TSP)의 개별 입자에 대하여, 고분해 주사전자현미경 및 에너지분산 X선 분광분석을 이용한 광물학적 특성 및 혼합상태 분석을 실시하였다. 황사 입자들 중, 석영, 사장석, K-장석, 각섬석, 흑운모, 백운모, 녹니석, 방해석 등은 비교적 조립질 입자로 산출되며, 이들 입자는 얇은 극미립 일라이트질 점토광물 층으로 피복되어 있다. 극미립 점토광물 입자들은 또한 개별 점토 덩어리를 형성한다. 조립질 방해석 외에 나노섬유 방해석들이 개별적으로 또는 집합체로 큰 입자를 피복하거나 점토광물과 함께 덩어리를 형성한다. 입자의 주 광물에 따라 광물학적 분류를 실시하고 빈도를 구하였다. 이번 TSP의 단일입자 광물학적 특성 및 혼합상태는 기존의 PM10 분석결과와 거의 차이가 없었다. The mineralogy and mixing state were investigated by the high resolution scanning electron microscopy combined with energy-dispersive X-ray analysis on particles of the total suspended solid (TSP) samples collected during the Asian dust event, spring, 2009. Relatively large particles were dominated by quartz, plagioclase, K-feldspar, amphibole, biotite, muscovite, chlorite, and calcite. Clay minerals usually occur as thin coatings on the coarse minerals or as aggregates. Calcite nanofibers are often admixed with clay platelets in the clay coatings and aggregates. Dust particles were classified on the basis of their main minerals. The single-particle mineralogy and mixing state of the TSP sample are consistent with those of PM10 samples in previous studies.

Q 파 심근경색과 비 - Q 파 심근경색의 임상경과 및 관동맥조영술 소견의 비교

정기영(Ki Young Chung),홍석근(Suk Keun Hong),이명룡(Myung Yong Lee),조주희(Joo Hee Zo),김준수(June Soo Kim),김치정(Chee Jeong Kim),조명찬(Myeong Chan Cho),박영배(Young Bae Park),이명묵(Myoung Mook Lee),최윤식(Yun Shik Choi),서정돈(Ju 대한내과학회 1991 대한내과학회지 Vol.40 No.1

Despite of having smaller infarct size and better left ventricular function, patients with non-Q wave myocardial infarction has been reported to have an high late cardiac event rate, and long term prognosis is ultimately comparable to that of patients with Q wave myocardial infarction. This is because there is more viable tissue in the perfusion zone of infarct-related artery rendering myocardium more prone to reinfarction. To compare the prognosis and clinical characteristics of Q wave myocardial infarction with those of non-Q wave myocardial infarction, 390 patients with acute myocardial infarction were reviewed and analyzed retrospectively. Patients were classified according to electrographic results into Q wave infarction (n=336) and non-Q wave infarction (n=54). Predischarge coronary angiography, gated blood pool scan, end treadmill exercise test were performed. There was no significant difference in sex, age, angina history, previous myocardial infarction, location of infarction, and severity of coronary disease; Q wave myocardial infarction did have higher peak CK (1733.9±1432.6 vs. 511.1±588.8 IU; P<0.01) and CK-MB fraction level (334.2±371.5 vs. 78.7±128.5; P<0.01). Predischarge treadmill exercise test showed no significant difference in the exercise duration, ST segment change, and chest pain. In gated blood pool scan, ejection fraction of left ventricle did not show significant difference, but proportion of normal left ventricular wall motion was significantly higher in non-Q wave infarction. (21/257 vs. 19/42; P<0.01). The extent of coronary artery disease and degree of coronary artery stenosis was not different between two groups, but high degree obstruction (>90%) of infarct related artery was more frequent in Q wave myocardial infarction (134/187 vs. 19/35; P<0.05). During follow-up, in-hospital mortality was significantly higher in Q wave myocardial infarction (13% vs. 2%, p<0.01). But postdischarge mortality and the rate of reinfarction did not different between two groups. Further prospective studies should be performed to clarify the clinical behaviors and long-term prognosis in patients with non-Q wave myocardial infarction.

농축단호박 분말을 대체한 설기떡의 품질 특성

정기영 ( Ki Young Jeong ),김문용 ( Mun Yong Kim ),전순실 ( Soon Sil Chun ) 한국식품조리과학회(구.한국조리과학회) 2008 한국식품조리과학회지 Vol.24 No.6

DPPH radical scavenging activities were 66.80% by hot water extract and 41.86% by 80% methanol extract. Inhibitions of angiotensin I-converting enzyme (ACE) were 91.09% by hot water extract and 75.20% by 80% methanol extract. In this study, Sulgidduk samples were prepared with 1, 3, 5, and 7% concentrated sweet pumpkin powder (CSPP), and a control were examined for quality characteristics such as moisture content, water activity, color, textural characteristics, and sensory qualities, in order to determine the optimal ratio of CSPP in the formulation. The samples containing CSPP exhibited significantly higher moisture content than the control group. Water activity was not significantly different among the Sulgidduk samples. For the color, the control group presented significantly higher lightness as compared to the samples containing CSPP. The samples containing 1 and 3% CSPP had significantly higher greenness than the samples containing 5 and 7% CSPP. Yellowness increased as the level of CSPP content increased. In terms of textural characteristics, hardness, gumminess, and chewiness were highest at the 1% substitution level, while lowest at the 3% level. The CSPP samples presented significantly higher adhesiveness, springiness, and cohesiveness than the control group. In the consumer acceptance and characteristic intensity rating test, the control group showed significantly higher color and flavor as compared to the CSPP samples. Pumpkin flavor, delicious taste, and off-flavor increased with increasing amounts of CSPP. Softness, overall acceptability, and gumminess were not significantly different among the various samples tested. Sweetness was highest at the 5% substitution level, while lowest at the 1% level. In conclusion, the results indicate that substituting 3~5% CSPP to Sulgidduk is optimal, providing good DPPH radical scavenging activity and inhibition of ACE as well as reasonably high overall acceptability.

안동 초염기성암 복합체의 함금운모 사방휘석암

정기영 ( Gi Young Jeong ),이승렬 ( Seung Ryeol Lee ),권석기 ( Seok Ki Kwon ) 한국광물학회 2012 광물과 암석 (J.Miner.Soc.Korea) Vol.25 No.4

안동 초염기성암 복합체에서 발견된 함금운모 사방휘석암의 산출과 광물학적 특성을 보고한다. 사방휘석암은 복합체 내에서 1 m 내외 두께의 층상암체로 산출되며, 대부분 조립 자형-반자형 사방휘석으로 구성되어 있다. 소량광물로서 단사휘석, 금운모, 사장석이 미량의 크롬 스피넬, 펜틀란다이트, 인회석, 저어콘과 함께 수반된다. 단사휘석은 사방휘석 내에 용리되어 있거나, 후기에 사방휘석 간극을 충전한다. 전자현미분석에 의하면 사방휘석과 단사휘석은 각각 엔스태타이트와 투휘석이며, 시료별 조성 차이가 거의 없다. 금운모와 사장석도 사방휘석의 간극을 충전하며 거의 일정한 조성을 보인다. 후기변질작용으로 사방휘석, 단사휘석, 사장석이 각각 활석, 각섬석, 사문석으로 변질되었다. 사방휘석암은 초염기성 마그마로부터 분별결정작용으로 생성된 것으로 보인다. 현재 미상인 안동 초염기 성암 복합체의 지질시대가 사방휘석암의 금운모와 저어콘에 대한 연대측정으로 규명될 것으로 기대된다. Phlogopite-bearing orthopyroxenite occurs in Andong ultramafic complex in a planar body of about 1 meter thick, and consists mostly of coarse subhedral to euhedral orthopyroxene crystals. Minor minerals are clinopyroxene, phlogopite, and plagioclase with trace chromian spinel, pentlandite, apatite, and zircon. Clinopyroxene occurs as either exolution lamella or interstitial fillings with phlogopite and plagioclase. Electron microprobe analysis showed that orthopyroxenes are entatite, while clinopyroxenes are diopside with little chemical variation through samples. Hydrous alteration resulted in the formation of talc, amphibole, and serpentine from orthopyroxene, clinopyroxene, and plagioclase, respectively. The orthopyroxenite was probably formed by the fractional crystallization of the ultramafic magma. Radiogenic dating of phlogopite and zircon of the orthopyroxenite would reveal the age of the Andong ultramafic complex.

파나마 메트로 3호선 차량기지 건설공사 PJT 설계 및 시공사례

정기영(Ki Yeong Jeong),방정영(Jung Young Pang),김재흥(Jae Heung Kim),김재홍(Jae Hong Kim) 대한토목학회 2023 대한토목학회지 Vol.71 No.5

고분자 도포를 이용한 실리콘-탄소의 합성 및 Si-C|Li Cell의 전기화학적 특성

도칠훈,정기영,진봉수,안계혁,민병철,최임구,박철완,이경직,문성인,윤문수,Doh, Chil-Hoon,Jeong, Ki-Young,Jin, Bong-Soo,An, Kay-Hyeok,Min, Byung-Chul,Choi, Im-Goo,Park, Chul-Wan,Lee, Kyeong-Jik,Moon, Seong-In,Yun, Mun-Soo 한국전기화학회 2006 한국전기화학회지 Vol.9 No.3

실리콘 분말에 polyaniline(PAn)을 중합하고 탄화하여 Si-C재료를 개발하고 물리적 특성 및 전기화학적 특성을 분석하였다. 평균입도는 PAn의 중합으로 증가하였으며 탄화로 일부 감소하였다. XRD분석으로 결정질의 실리콘과 비결정성의 탄소 재료가 공존함을 확인 하였다. Si-PAn 전구체로 부터 개발한 Si-C 재료를 이용한 Si-C|Li cell은 Si|Li cell에 비하여 우수한 특성을 나타내었으며, 탄소 전구체인 PAn의 HCl 탈도핑에 의해 전기화학적 특성을 개선할 수 있었다. 전해액 중 FEC 첨가한 경우 초기 방전 용량이 증가하였다. GISOC시험으로 구한 가역 비용량 범위는 Si-C(Si:PAn=50:50wt. ratio)|Li 전지의 경우 약 414mAh/g를 나타내었으며, 가역 범위에 대한 초기 충방전의 intercalation 효율(IIE)는 75.7%였으며, 표면 비가역 비용량은 35.4mAh/g을 나타내었다. Si-C composites were prepared by the carbonization of silicon powder covered by polyaniline(PAn). Physical and electrochemical properties of the Si-C composites were characterized by the particle size analysis, X-ray diffraction technique, scanning electron microscope, and electrochemical test of battery. The average particle size of the Si was increased by the coating of PAn and somewhat reduced by the carbonization to give silicone-carbon composites. XRD analysis' results were confirmed co-existence of crystalline silicon and amorphous-like carbon. SEM photos showed that the silicon particle were well covered with carbonacious materials depend on the PAn content. Si-C|Li cells were fabricated using the Si-C composites and were tested using the galvanostatic charge-discharge test. Si-C|Li cells gave better electrochemical properties than that of Si|Li cell. Si-C|Li cell using the Si-C from HCl undoped PAn Precursor showed better electrochemical properties than that from HCl doped PAn Precursor. Using the electrolyte containing FEC as an additive, the initial discharge capacity was increased. After that the galvanostatic charge-discharge test with the GISOC(gradual increasing of the state of charge) condition was carried out. Si-C(Si:PAn:50:50 wt. ratio)|Li cell showed 414 mAh/g of the reversible specific capacity, 75.7% of IIE(initial intercalation efficiency), 35.4 mAh/g of IICs(surface irreversible specific capacity).

PVDF 전구체를 이용한 탄소 도포 실리콘 재료의 개발 및 리튬이차전지 음극특성

도칠훈,정기영,진봉수,김현수,문성인,윤문수,최임구,박철완,이경직,Doh, Chil-Hoon,Jeong, Ki-Young,Jin, Bong-Soo,Kim, Hyun-Soo,Moon, Seong-In,Yun, Mun-Soo,Choi, Im-Goo,Park, Cheol-Wan,Lee, Kyeong-Jik 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.7

Si-C materials were synthesized by the heating the mixture of silicon and polyvinylidene fluoride (PVDF). The electrochemical properties of the Si-C materials as the high capacitive anode materials of lithium secondary batteries were evaluated by the galvanostatic charge-discharge test through 2032 type $Si-C{\mid}Li$ coin cells. Charge-discharge tests were performed at C/10 hour rate(C = 372 mAh/g). Initial discharge and charge capacities of $Si-C{\mid}Li$ cell using a Si-C material derived from PVDF(20wt.%) were found to be 1,830 and 526 mAh/g respectively. The initial discharge-charge characteristics of the developed Si-C electrode were analyzed by the electrochemical galvanostatic test adopting the capacity limited charge cut-off condition(GISOC). The range of reversible specific capacity IIE(intercalation efficiency at initial discharge-charge) and IICs(surface irreversible specific capacity) were 216 mAh/g, 68 % and 31 mAh/g, respectively.

Zircon SHRIMP U-Pb and phlogopite Ar-Ar ages of orthopyroxenitein Andong serpentinite

Gi Young Jeong(정기영),Kiwook Lee(이기욱),Chang-Sik Cheong(정창식),Jeongmin Kim(김정민),Seok-Ki Kwon(권석기) 한국암석학회 2013 한국암석학회 학술발표회 논문집 Vol.2013 No.5