산소결핍 탄탈륨 산화물을 활용한 탄탈륨 산질화물 및 질화물 합성

박종철,피재환,김유진,최의석,Park, Jong-Chul,Pee, Jae-Hwan,Kim, Yoo-Jin,Choi, Eui-Seock 한국분말야금학회 2008 한국분말재료학회지 (KPMI) Vol.15 No.6

Colored tantalum oxy-nitride (TaON) and tantalum nitride ($Ta_{3}N_{5}$) were synthesized by ammonolysis. Oxygen deficient tantalum oxides ($TaO_{1.7}$) were produced by a titration process, using a tantalum chloride ($TaCl_5$) precursor. The stirring speed and the amount of $NH_{4}OH$ were important factors for controling the crystallinity of tantalum oxides. The high crystallinity of tantalum oxides improved the degree of nitridation which was related to the color value. Synthesized powders were characterized by XRD, SEM, TEM and Colorimeter.

수종 시판 경추보조기의 물성에 관한 평가조사

박종철,김경태,서활,Park, Jong-Chul,Kim, Kyung-Tae,Suh, Hwal 대한의용생체공학회 1997 의공학회지 Vol.18 No.3

본 시험조사는 정형외과, 신경외과, 재활의학과 등에서 경부 척추를 물리적으로 고정하는 데 널리 사용되고 있는 연성, 토마스, 미네르바 및 필라델피아 경추보조기의 물성을 조사하여 새로운 경추보조기를 고안하기위한 기초자료를 얻기 위하여 이루어 졌다. 인장강도는 토마스 보조기가 가장 우수했으며 지속적인 마모를 통한 재료 관통시험에서는 미네르바 보조기가 가장 우수한 내구력을 가진 것으로 나타났다. 이러한 결과로 미루어 볼 때, 에틸렌수지를 구조체로 사용하고 피부에 통기성을 부여하기 위해 재료에 다공성을 제공하는 것이 좋을 것으로 사료된다. This is to investigate the physical properties of the commercially available Soft, Thomas, Minerva, and Philadelphia cervical braces which are widely used in orthopedics, neurosurgery, and rehabilitation medicine clinics as assisting devices for physical stabilization of cervical vertebrates, to use as a basic data for designing new type brace. Tensile strengths were observed by universal mechanical measuring device and Thomas brace required the highest stress to break by tensile stress. Durabilities against continuous frictional forces were also determined, and Minerva brace demonstrated the longest frictional time until being perforated. According to these results, poly ethlene is recommendable as a frame and preparation of pores in the material is favorable to provide ventilation to skin.

맥류 바이러스병 발생 현황 및 BaYMV-Ik와 BnMMV에 대한 저항성 유전자의 반응

박종철,서재환,김양길,김정곤,Park Jong-Chul,Seo Jae-Hwan,Kim Yang-Kil,Kim Jung-Gon 한국작물학회 2005 Korean journal of crop science Vol.50 No.3

월동 후 맥류 재배지에서 나타나는 이상 증상으로는 주로 잎에 황화등의 변색과 모자이크성 반점 등이 조사되었다. 이들 증상을 가진 잎의 바이러스 검정 결과 $78\%$이상에서 바이러스 감염이 확인되었으며, 주로 BaYMV와 BaMMV에 의해 발생하였다. 전국일원의 맥류 재배지에서 4개년간 BaYMV, BaMMV SBWMV와 BYDV-MAV(2003년) 등 4종의 바이러스의 발생율을 조사한 결과 대상 바이러스 중 BaYMV가 가장 높은 감염율을 나타내었다. BaYMV는 조사 4개년 동안 평균 발생율이 $70\%$이상으로 전국적으로 큰 차이 없이 가장 높은 발생율을 보였다. 그러나 경기지역의 경우는 $20\%$정도로 다른 지역의 $65\~85\%$에 비해 낮은 발생율을 보였다. BaMMV는 전북, 전남, 경기, 강원, 경남지역에서 $20\~40\%$를 보인 반면, 경북, 충남, 경기지역에서는 발생이 적었다. SBWMV와 BYDV-MAV는 현재까지 국내 보리 재배지에서 다발생되고 있지는 않았다. 저항성 유전자원에 대해 바이러스에 대한 저항성 반응을 검정한 결과 BaYMV와 BaMMV가 단독 또는 복합 감염되는 형태로 나타났으며, SBWMV는 감염이 확인되지 않았다. 저항성 유전자별 반응을 검정한 결과에서 익산 발생하고 있는 BaYMV-Ik strain과 BaMMV에 대해 모두 저항성인 유전자는 확인되지 않았으나 국내 맥류 재배지에서 가장 발생이 많은 BaYMY-lk체 대해 저항성 반응을 보인 유전자는 Ishukushirazu, Chosen에 들어있는 rym 3, Tokushima Mochi Hadaka의 rym 4y 및 Hakei I-41의 rym 5a로 나타났다. 그러나 BaYMY-lk에 대해 저항성으로 확인된 rym 3, rym 4y 및 rym 5a의 경우 BaMMV에는 모두 감염이 확인되었으며, rym 1+5 두개의 저항성 유전자를 가지고 있으며 일본의 모든 BaYMV strain에 저항성인 Mokusekko 3도 감염이 확인되었다. 유전자에 따른 병징 발생 양상을 조사한 결과 일반적인 바이러스 병징과 같이 대부분 모자이크나 황화가 발생하였다. 그러나 저항성 유전자에 따라 고사, 괴사 반점, 조직 괴사, 줄무늬성 증상과 잎 말림등의 다양한 증상이 확인되었다. The major symptom such as yellowish and mosaic spots in overwintering barley were mostly caused by viruses such as Barley yellow mosaic virus (BaYMV) and Barley mild mosaic virus (BaMMV) in the nation-wide for four years. The result showed that more than $78\%$ collected samples were infected by the viruses. The incidence of Ba YMV was more than $70\%$, and relatively uniformly distributed in the southern regions of barley fields in Korea. However the incidence of BaYMV in Gyeonggi Province was as low as $19\%$ compared to $65\~85\%$ in the rest of regions. Occurrence of BaMMV varied depending on investigated regions such as $20\~40\%$ in Jeonbuk, Jeonnam, Gangwon and Gyeongnam, and a lower infection in Gyeongbuk, Chungnam and Gyeonggi Provinces. In this result, $60\%$ of BaMMV was found to be in the southwest regions of Korea such as Jeonbuk and Jeonnam Provinces. Over all, both BaYMV and BaMMV were thought to be dominantly casual agents in overwintering barley by either solely or mixed infections. Soil-borne wheat mosaic virus(SBWMV) occurred at most $14\%$ in Gyeonggi and Barley yellow dwarf virus-MAY (BYDV­MAV) was found only one place in Jeonbuk, suggesting that SBWMV and BYDV-MAV were not significant diseases in Korea. Exotic genetic resources that possess different resistant genes to BaYMV and BaMMV were tested to identify the responses to the viruses occurred in Iksan. According to the ELISA results, BaYMV and BaMMV were infected in some plant materials but SBWMV was not identified. Any resistant gene was not effective to BaYMV-Ik (Insan strain) and BaMMY. Ishukushirazu (rym 3) and Chosen (rym 3), Tokushima Mochi Hadaka (rym 4y) and Hakei 1-41 (rym 5a) showed resistant response with little symptoms to BaYMY. The other five accessions possessing rym 1+5, rym 2, rym 4m, rym 5 and rym 9, respectively, were resistant to BaMMV. Various symptoms were observed in the tested plant materials such as not only yellowish and mosaic symptoms mostly but also necrotic spot, tissue necrosis, leaf stripe and leaf curling. However, it was difficult to find any relationship between resistant genes and specific symptoms.

연구발표논문초록 : 3성분계에 있어서 TPTT 식의 각변수에 미치는 영향이 분자간 상호작용에너지 PARAMETER 의 상관관계 RESPONSE MODEL 에 주는 영향

박종철,이성래,조창휘 ( JONG CHUL PARK,SEOUNG RAE LEE,CHANG WHEE CHAO ) 한국화학공학회 1982 춘계총회초록집 Vol.- No.-

극저온의 생성 및 dc SQUID개발

박종철,Park, Jong-Chul 대한설비공학회 1989 설비저널 Vol.18 No.2

액체헬륨온도(4.2K)를 얻을 수 있는 극저온 소형 냉동기 개발과 정밀측정(전류, 자장, 전압 등)에 사용되고 있는 dc SQUID(초전도 양자간섭장치) 제작에 관하여 설명하였다. 이와 아울러 극저온 연구가 첨단과학 및 산업에 어떻게 응용하고 있는가와 국내외 연구현황에 대하여 간단히 기술하였으며 앞으로의 대책에 관하여 논의한다.

인태아 방실결절의 발육에 관한 전자현미경적 연구

박종철,박성식,윤재룡,Park, Jong-Chul,Park, Sung- Sik,Yoon, Jae-Rhyong 한국현미경학회 1998 Applied microscopy Vol.28 No.1

Ultrastructural study of the development of the atrioventricular (AV) node was studied by electron microscopy in human fetus ranging from 30 mm to 260 mm crown rump length, and compared with human adult. By 30 mm fetus, the right AV nodal primordium was located below the attachment of the right venous valve. The left AV nodal primordium was observed below the attachment of septum primum. The cytoplasm of the nodal primordia contained few mitochondria, and myofibrils. These cells were apposed to each other with occasional desmosomes. In 40 mm fetus, the AV node cells were poorly organized myofibrils, while working myocardial cells were well organized myofibrils with sarcomere. At 70 mm fetus, intercalated discs were developed in the working myocardial cells. At 100 mm fetus, the nodal cells contained a relatively clear cytoplasm with a few groups of myofibrils and mitochondria. By $140\sim200$ mm fetuses, the nodal cells were an increasing number of myofibrils and mitochondria and these were scattered throughout the cytoplasm. At 260 mm fetus, the nodal cells were small and contained a clear cytoplasm with sparse and poorly organized myofibrils and mitochondria. All major ultrastructural features which characterize the adult AV nodal cells were found in this stage. The working myocardial cells were larger and had a more compact cytoarchitecture than nodal cells. Zonula adherens or fasciae adherens type junction were not found between nodal cells, but they frequently observed between nodal and working myocardial cells.

PRISM, 역거리가중법, 공동크리깅으로 작성한 1km 공간해상도의 남한 강수 자료에서 강수 분포의 비교

박종철,김만규,Park, Jong-Chul,Kim, Man-Kyu 한국지리정보학회 2013 한국지리정보학회지 Vol.16 No.3

본 연구의 목적은 3 가지 보간 방법으로 생산한 남한 강수 자료에서 강수 분포의 차이를 비교하는 것이다. 보간된 강수 자료를 생태환경모델링, 수문모델링, 기후변화 영향평가 등의 연구에서 이용할 때 보간 방법에 따른 강수량의 차이는 중요한 정보이기 때문이다. 연구에는 기후변화정보센터에서 PRISM(Precipitation-elevation Regressions on Independent Slopes Model)으로 작성한 강수 자료와 본 연구에서 공동크리깅과 역거리가중법으로 작성한 강수 자료가 사용되었다. 보간된 강수 자료의 공간해상도는 1km이다. 보간 방법 선택에 의해 발생하는 강수량의 차이는 대체로 산지 유역의 자료에서 크다. 특히 군사분계선 주변과 소백산, 월악산, 덕유산, 지리산, 태백산지의 강수 자료에서 보간 방법의 차이에 따라 발생하는 월강수량의 차이는 약 10~20%, 또는 그 이상이었다. 이는 이 지역의 연구에 보간된 강수 자료를 이용할 때 연구에 채택한 보간 방법에 따라 최종 결과가 큰 영향을 받을 수 있다는 것을 의미한다. The purpose of this study is to compare precipitation distributions in precipitation data sets over South Korea produced by three interpolation methods. The differences of precipitation caused by interpolation methods is an important information when the interpolated precipitation data sets were used in researches such as ecological and hydrological modeling as well as regional climate impact studies. In this study, the precipitation data sets were produced by IDW(Inverse Distance Weighting) and Cokriging in this study and the PRISM(Precipitation-elevation Regressions on Independent Slopes Model) data set obtained from Climate Change Information Center of Korea. The spatial resolution of the precipitation data is 1km. As a result, there was a great precipitation difference caused by interpolation methods in data of mountainous watersheds in general. Especially the difference of monthly precipitation was 10~20% or more in the mountainous watersheds near the Military Demarcation Line dividing North and South Korea, Mt. Sobaik, Mt. Worak, Mt. Deogyu, Mt. Jiri and Taeback Mountain Range. It means that a final result of a research can be affected by adopted interpolation method when an interpolated precipitation data set is used in the research for the these study sites.

"서비스 품질-고객만족" 관계에서의 심리적 메커니즘 고찰

박종철 ( Jong Chul Park ),오혜영 ( Hye Young Oh ),홍성준 ( Sung Jun Hong ) 한국소비자학회 2011 소비자학연구 Vol.22 No.2

그동안 서비스 품질구성 요인들이 고객만족이나 서비스 충성도에 중요한 영향을 미치며 이러한 효과가 고객유형 같은 조절변수(신규고객 vs. 기존고객)에 따라 달라질 수 있음이 제시되었다. 그러나 기존 연구들은 서비스 품질의 위계구조를 파악하거나 이들 품질요인들이 여러 종속변수(예; 고객만족, 고객충성도, 구매의도)에 미치는 차별적 효과에 집중하였을 뿐, 왜 그러한 영향을 미치는지에 대한 심리적 기재(특히, 감정적 반응)를 밝히는 데는 소홀하였다. 이에 본 연구에서는 기존 연구를 토대로 서비스 품질의 세 가지 차원을 은행서비스 상황에 적용시켜, 서비스 품질의 세 가지 차원(과정품질, 결과품질, 물리적 환경품질)이 고객만족도에 영향을 미치는데 있어 호혜성이라는 새로운 감정변수의 매개역할을 고찰하고자 한다. 분석결과, 결과품질과 환경품질은 지각된 가치에 긍정적인 영향을 미치는 것으로 나타났으나, 과정품질은 지각된 가치에 유의한 영향을 미치지 않는 것으로 나타났다. 과정품질이 지각된 가치에 영향을 미치지 않은 이유는 은행서비스의 특성상 종업원의 친절, 직원에 대한 믿음, 전문성 및 지식에 대하여 고객들이 당연한 서비스로 인식했기 때문으로 추론된다. 또한 서비스 품질이 신뢰형성에 미치는 효과와 관련해서는 과정품질과 결과품질만이 신뢰형성에 긍정적인 영향을 미치는 것으로 나타났다. 그리고 서비스 품질과 호혜성 형성과 관련해서는 과정품질과 결과품질이 호혜성 지각에 긍정적인 영향을 미치는 것으로 나타났으나, 환경품질이 호혜성 지각에는 유의한 영향을 미치지 않는 것으로 나타났다. 끝으로 지각된 가치와 신뢰, 그리고 호혜성 지각은 고객만족도에 모두 긍정적인 영향을 미치는 것으로 나타났다. 결과적으로 본 연구를 통해 우리는 서비스의 결과품질은 소비자들로 하여금 다양한 인지적(지각된 가치 및 신뢰형성)반응과 감정적 반응(호혜성)을 유발하여 고객만족에 영향을 미치는 것을 알 수 있었다. During the past two decades has much research effort on the field of service quality as a major driver of business performance(customer satisfaction).It has become a key strategic issue on service management`s agenda. As service companies continue to seek unique source of sustainable competitive advantage, service quality has been discussed conceptually as a potential alternative to traditional skills and resources, as well as empirically tested as a potential driver of improving performance(customer satisfaction). Above all, previous studies were only investigated perceived value and trust as a cognitive mechanism in the ``service quality-customer satisfaction`` relation. So, the aim of this research is to examine reciprocity as a psychological mechanism(especially an affective response) in the relationship between service quality dimensions(outcome quality, process quality, physical environment quality) and customer satisfaction. Therefore, different from the past studies, in this study we postulates that the reciprocity plays an essential mediating role in the relationship between the three dimensions of service quality and customer satisfaction. A model integrating three dimensions of service quality, perceived value, trust, reciprocity and the customer satisfaction is tested using the data of 200 general consumers. Sample and Data Collection: This data was collected in two large cities in South Korea: Seoul and Kwangju. 200 general consumers utilizing bank services participated in the survey. Participants were recruited from people attending evening cultural education programs provided by local community centers and MBA programs provided by University. In terms of demographics, slightly more than a half of participants were male(n=136), and 89%(n=178) had a higher education. Participants held various occupational backgrounds; housewives (n=7), corporate managers(n=88), public officials(n=23), self-employed(n=13), teachers(n=4), professional practices(n=26), skilled laborers(n=3), students(n=7), and others(n=29). Data analysis was conducted in three phases. The first phase was measurement analysis (i.e., item purification and facture structure confirmation) involving the scales of the three dimensions of Service Quality, perceived risk, trust, perceived reciprocity, and customer satisfaction. In the second phase, the structural relationships among the key constructs proposed in Fig 1 were estimated. In the last phase, the mediating effect was examined. Structural Model: the structural equations model is estimated by using LISREL 8.30. The goodness-of-fit statistics are acceptable(χ2=166.41, df=98(p=.000), GFI=.910, AGFI=.860, NFI=.920, CFI=.956, RMR=.055). Convergent validity was assessed using the significance and magnitude of factor loadings. As is shown in Table 2, the magnitudes of factor loadings ranged from 0.61 and 0.85 and all the loadings were significant (p<0.01). Discriminant validity among the three dimensions of service quality were examined by performing a chi-square difference test between a model where all the factor correlations were fixed at 1.0 and the unconstrained model(see the ``Φ Matrix`` of Table 3). The constrained model showed a significantly poorer fit compared to the unconstrained model. After confirming the measurement models, the model shown in Figure 1 is estimated using LISREL 8.30. In this model, all constructs were operationalized through their summed scaled indexes, resulting in one indicator for its construct. The LISERL analysis shows a satisfactory fit of the model as indicated by the GFI(.895), AGFI(.845), NFI(.886), NNFI(.916), CFI (.935), RMR(.066), RMSEA(.068), respectively. However, the chi-square test was significant (x2=198.73, df=104, p<0.00). Given the satisfactory fit of the model, the estimated path coefficients were then examined to evaluate the hypotheses. The results of data analysis showed that the process quality positively influences on the trust and reciprocity. However, the process quality had a significant impact not on the perceived value. Also, the outcome quality positively influences on the perceived value, trust and reciprocity. Physical environment quality only impacts on the perceived value. Finally, our results indicated that the perceived value, trust, and reciprocity have a significant influence on the customer satisfaction. Thus, this study demonstrates that reciprocity indeed plays a mediating role between the service quality and the customer satisfaction. Also, we has known the facts inducing affective responses in the service context. The results of this study will help managers to understand the relative importance of the three different quality.

부정문 메시지가 소비자태도 형성에 미치는 영향

박종철(Jong Chul Park) 한국마케팅학회 2008 마케팅연구 Vol.23 No.2

본 연구는 설득커뮤니케이션 맥락에 있어 제품의 속성(benefits)을 강조시키기 위해 사용되어지는 부정문 메시지(negation message)가 소비자들의 반응에 어떠한 영향을 미치는지를 살펴보고 있다. 특히, 본 연구는 부정문 메시지(negation message)가 소비자 태도형성에 영향을 미치는데 있어서 메시지 중요도가 미치는 영향을 살펴보고 있다. 기존 연구에 따르면, `이 제품은 사용하기 쉽지 않다`라는 부정문 메시지가`이 제품은 사용하기 어렵지 않다`라는 메시지보다 더 호의적으로 평가되었다. 그러나 본 연구에서는 기존의 아이러니한 결과가 메시지의 중요도에 따라 달라질 수 있음을 제시하였다. 분석결과, 메시지 중요도가 낮은 부정문 메시지의 경우, 기존 연구결과와 동일하게`쉽지 않다`라는 부정문 메시지가`어렵지 않다`라는 메시지보다 더 호의적으로 평가되었다{긍정초두효과( `affirmation primacy effect)`가 나타남}. 그러나 중요도가 높은 부정문 메시지의 경우`쉽지 않다`와`어렵지 않다`라는 부정문 메시지의 평가차이는 나타나지 않았다{긍정초두효과( `affirmation primacy effect)`가 약화됨}. 이러한 이유는 중요도가 서로 다른 부정문 메시지 노출 후, 부호화시점에서 인지적 정교화 정도가 다르므로, 시간지연에 따라 평가/판단 시점에서 부정어태그에 대한 접근성 정도가 다르기 때문이다. This study examined the influence of the negation message which is used to enhance product benefit on the consumer response in the persuasive context of product benefits. Negations are part of our daily language and communication. Especially, a negation is often used in marketing context to influence consumers` product expectation. Whereas an affirmation describes a brand`s features, a negation achieves distinction by incorporating a negator, such as `not` or `no`. It typically appears in persuasive communications in the form of a single syntactical expression. Beside, people usually succeed in understanding the intended meaning of negation. Yet, I believe that a message which is phrases as a negation can under certain conditions activate associations that are incongruent with the message meaning, and might thus introduce communication errors that may actually lead to inferences opposite whether and how this can happen. Although the persuasive impact of importance of negations message has not been investigated, psycholinguistic research offers a starting point for predicting their effects on consumers` response. Several studies support the notion that the processing of a negation is more cognitive elaboration(or resource) demanding than the processing of an affirmation. Also the same lines, respondents were slower in generating deductions when a negation was present than when it was absent. Also, prior research suggested that encoding negations requires more time because it entails processing an additional operator, the negation operator, which is separated or dissociated from the message`s core concepts. So, this study explores how negation are encoded by considering the importance of negations message. According to the schema-plus-tag model, a negated message is represented as a core supposition and a negation tag, allowing for dissociation of the two at a later point in time. Especially, past research showed that consumers evaluated more positively when the persuasive message in the product benefits was `this product is not easy to use` than when it was `this product is not difficult to use`(affirmation primacy effect). According to an affirmation primacy effect, Not only are more resources needed to process a negation than an affirmation but also these resources are allocated to the processing of an affirmation. Initial resources are allocated to the processing of an affirmation. If additional resources are available, they are used to process the negator. Therefore, this study examined the moderating role of the message importance in the influence of the negation message on the attitude formations. Namely, I compared the two types of negation message by examining the nature of inferences and the accessibility of a negation tag that is considered by message importance. According to the present results, when the negation message is not important, consumers evaluate `not easy to use` more positively than `not difficult to use`(an affirmation primacy effect was generated). However, these affirmation primacy effects are weakened when the negation message is important. The reason is that the accessibility of the negator tag was generated weakly or strongly as time goes by, according to the importance of negation message context. My finding offers support for the schema-plus-tag model. As expected, in the case that resources or cognitive elaborations were limited, memory for the negated product feature was impoverished, and thus, when the message importance is low, the negation had no effect on consumers` judgment.

개선된 SOSTBC 적용된 BICM

박종철(Jong-Chul Park),김창중(Chang-Joong Kim),이호경(Ho-Kyoung Lee) 대한전자공학회 2008 電子工學會論文誌-TC (Telecommunications) Vol.45 No.3

본 논문에서는 개선된 초직교 시공간 블록 부호(Super-Orthogonal Space-Time Block Code; SOSTBC)에 적용되는 비트인터리브 된 부호화 변조(Bit-Interleaved Coded Modulation; BICM)를 제안하였다. 이 시스템은 초직교 시공간 격자 부호(Super-Orthogonal Space-Time Trellis Code; SOSTTC)와 비슷한 복잡도로 더 높은 부호 다이버시티를 얻을 수 있다. 이는 개선된 SOSTBC를 사용함으로써 비트 다이버시티가 SOSTBC의 최대 다이버시티까지 이를 수 있기 때문이다. 반면 Jafarkhani 등이 제안한 SOSTBC를 사용하는 BICM은 비트 다이버시티가 항상 1이 되기 때문에 SOSTTC 보다 높은 부호 다이버시티를 얻기 어렵다. In this paper, we propose a bit-interleaved coded modulation (BICM) applied to improved super-orthogonal space-time block code(SOSTBC). The proposed system achieves a greater diversity gain than that of super-orthogonal space-time trellis code (SOSTTC) with similar decoding complexity. Since, using the improved SOSTBC, the bit diversity can be full diversity of SOSTBC. In contrast, BICM applied to Jafarkhani's SOSTBC is difficult to achieve a greater diversity gain than that of SOSTTC, because every bit diversity of the system is 1.