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이산푸리에 변환 시 발생하는 누설오차의 개선에 관한 연구
문행주(Haeng Ju Mun),오한음(Han-eum Oh),정의봉(Weui Bong Jeong) 한국소음진동공학회 2017 한국소음진동공학회 논문집 Vol.27 No.5
In the DFT (discrete Fourier transform) process of vibration signal, leakage error occurs inevitably due to the inconsistency between record length of measurement and period of signal. The frequency response function obtained in vibration testing will also be distorted by the leakage error. Window functions, which are used widely to reduce the effects of leakage error, cannot remove the leakage error thoroughly. In this paper, theoretical survey of the leakage error was carried out. The least square estimation was also suggested to reconstruct the magnitudes, phases and frequencies in the periodic signals contaminated by leakage error. Several numerical applications showed the validation of this method.
상자에 필터처리에 따른 표고 신품종 ‘화담’의 재배특성 및 자실체 생산성
김정한 ( Jeong-han Kim ),강영주 ( Young-ju Kang ),백일선 ( Il-sun Baek ),신복음 ( Bok-eum Shin ),하태문 ( Tai-moon Ha ),정구현 ( Gu-hyun Jung ) 한국균학회 2020 韓國菌學會誌 Vol.48 No.2
This study was carried out to develop a new method of cultivation of ‘Hwadam’ a new variety of Lentinula edodes, to improve fruiting body productivity and reduce labor. To determine the optimum filter number for box cultivation, L. edodes were assessed for their cultural characteristics and mushroom yield. During spawn running of L. edodes in the box, the temperature gradually increased to the highest value of 25.8℃, 23.7℃, and 23.0℃ on day 18 for the four filter, two filter, and no treatment groups, respectively. Oxygen concentration displayed an opposite trend to carbon dioxide concentration, reaching the lowest value on day 21. The oxygen concentration progressively increased as more filters were used (5.4%, 8.2%, and 8.9% treatment with no, two, and four filters, respectively. Growth of L, edodes in the box resulted in the highest yield (2,228 g/7kg substrate) and biological efficiency (70.7%) using four filters. The biological efficiency of the four filter treatment was 29.4% higher compared to bag cultivation (41.3%). Further studies are necessary to verify stable productivity of fruiting bodies through repeated cultivation.
김정한 ( Jeong-han Kim ),강영주 ( Young-ju Kang ),백일선 ( Il-sun Baek ),신복음 ( Bok-eum Shin ),최종인 ( Jong-in Choi ),이용선 ( Yong-seon Lee ),이윤혜 ( Yun-Hae Lee ),정윤경 ( Yun-kyeoung Jeoung ),이영순 ( Young-soon Lee ),지정 한국균학회 2020 韓國菌學會誌 Vol.48 No.2
A new oak mushroom cultivar ‘Hwadam’ was bred from monokaryotic strains of ‘GMLE36062’ and ‘LE15401’. The optimum temperature for mycelial growth of ‘Hwadam’ on potato dextrose agar was 25℃. The cultivation period of ‘Hwadam’ lasted for 129 days until the first harvest of the fruiting bodies, including 35 days for spawn run, 84 days for browning, and 10 days for development of fruiting bodies. The fruiting bodies of ‘Hwadam’ had a hemispherical, brighter pileus and thicker stipe than the control cultivar (Sanjo 701ho). The three-cycle yield of ‘Hwadam’ was 554 g, which was higher than that of control cultivar (405 g). In addition, ‘Hwadam’ contained 79.4 mg/g of beta-glucan and 0.93 mg GAEs/g of phenolic compounds, which was similar to that of the control cultivar but higher than that of 'L808' and 'Chujae 2ho'.
Ketjen Black 의 함유량에 따른 폴리아센 전극의 특성
이홍기,이주성,손원근,박수길,김한주,박종은 한국공업화학회 1999 응용화학 Vol.3 No.1
Polymer material should have stability and reversibility during the electrode reactions in the secondary batteries. Electrochemical properties of deeply Li-doped polyacenic semiconductor (PAS) material have been investigated. PAS material prepared from phenol resin at relatively low temperature (550℃∼750℃) can be doped by a much larger amount of lithium atoms up to the C_2Li state compared with graphite(C_6Li state) without any Li-metal electrolysis. We prepared each polyacenic materials as an electrode under various temperatures and mixed it with ketjen black in various ratio. The PAS electrode has been confirmed to show good stability and reversibility.
즐거움이 과연 조직성과에 긍정적인 영향을 미칠까? -생활협동조합을 중심으로-
옥정원 ( Jung Won Ock ),엄성원 ( Seong Won Eum ),김한주 ( Han Ju Kim ) 한국인적자원관리학회 2015 인적자원관리연구 Vol.22 No.1
본 연구는 참여를 통해 일어나는 감정적 반응인 즐거움을 통해 조합원과 생활협동조합의 조직성과와의 구조적 관계를 매력성, 지속적 정보탐색 및 호혜성이라는 매개변수를 통해 검증하고자 한다. 본 연구의 결과 첫 본 연구에서는 플로우(Flow)이론에 입각하여 참여와 참여를 통한 즐거움이 조합원의 몰입을 이끌어 내고 이러한 몰입을 통해 생활협동조합원들은 생활협동조합 제품에 대한 매력성을 지각하게 되면 상호 호혜성, 충성도 및 관계지속성에 긍정적인 영향을 미친다는 것이 가설(H1,H2,H5,H7,H8,H9)을 통해 검증되었으며, 참여를 통해 참여 즐거움을 느낀 조합원들은 제품 과 생활협동조합에 대한 지속적인 정보탐색을 한다는 것은 가설(H1,H2,H3)로 검증이 되었고 또한 이런 조합원들 생활협동조합 제품에 대한 매력성을 통해서도 또 다른 정보탐색에 대한 욕구가 생기고 더욱 더 생활협동조합과 관련된 정보를 지속적으로 탐색하려고 한다는 것을 가설(H4)를 통해서 지지되었다. 하지만, 생활협동조합의 조합원들이 참여를 통해 즐거움을 느끼게 되면 좀 더 생활협동조합과 관련된 정보를 탐색하려 하고 또한 친환경제품에 대한 관심도 더욱 가지게 되면서 생활협동조합 제품에 대한 지속적인 정보탐색을 한다는 것은 앞선가설에서 검증되었지만 이러한 지속적 정보탐색을 통해 생활협동조합에 대한 상호 호혜성 지각 혹은 생활협동조합에서 조합원으로 활동하고 있는 조합원들에 대한 상호 호혜성 지각은 일어나지 않는 것으로 가설(H6)에서 보여주고 있다. 이는 본 연구에서 중요한 시사점을 제공한다고 할 수 있다. 유기농 제품사용의 중요성 혹은 친환경제품에 대한 중요성을 지각한 소비자들이 생활협동조합에 조합원으로 참여하여 생활협동조합의 제품을 구매하려고 하지만 각각의 조합원들의 개인특성과 개인이 추구하는 목적에따라 다르게 나타난다는 것이다. This study aims to verify the structural relationship between the consumer cooperative and its members through enjoyment, an emotional reaction produced by participation, using the parameters of attractiveness, continuous information search, and reciprocity. In this research, it was verified with the hypotheses (H1, H2, H5, H7, H8, H9) that if enjoyment, induces engagement of the members of the consumer cooperative through participation on the basis of the Flow Theory, the members will become aware of the products of the consumer cooperative through engagement and it will have a positive effect on reciprocity, loyalty, and continuity of relations. It was also verified by the hypotheses (H1, H2, H3) that the members who felt enjoyment, through participation make continuous information search for the consumer cooperative and its products. In addition, it was supported by the hypothesis (H4) that such members have the desire to make additional information search through the attractiveness of the products of the consumer cooperative and continue to search for the information related to the consumer cooperative. However, while the previous hypotheses proved that the members of the cooperative try to search the information related to the cooperative when they feel enjoyment, through participation and make continuous information search for the products of the consumer cooperative with more interest in environment-friendly products, the hypothesis (H6) shows that such a continuous information search does not produce reciprocal recognition of the consumer cooperative or its members, which has an important suggestion in this study. It means that though the consumers who become aware of the importance of using organic products or environment-friendly products want to purchase the products of the consumer cooperative by participating in it as members, the personal characteristics and the goals pursued by each member appear differently. the increasing attention on the care-helper``s role in Korean society, little empirical research has been done on its job characteristics in relation to job stress. This paper investigated the influence of the job characteristics on the job stresses with moderating effects of relationship and task-conflicts based on 248 care-helpers`` in Korea. The results of the empirical analysis are as follows. First, the paper shows that task significance and task identity are positively related to the job stress, whereas feedback is negatively related to. Second, it is found that both relationship and task conflicts have positive influences with job stress. Third, the empiricalresult shows that relationship conflict positively moderate the relationship between job characteristics and job stresses but task-conflict has no significant moderating effect. The study findings were discussed along with managerial and theoretical implications and recommendations for future research and applications.
김광문(Kwang Moon Kim),엄주현(Ju Hyun Eum),박한규(Han Q Park),정영석(Young Suk Chung) 대한두경부종양학회 1990 대한두경부 종양학회지 Vol.6 No.1
Dermoid cyst of the floor of mouth is infrequent. This cyst has been classified as epidermoid, dermoid and teratoid cyst. Dermoid cyst is more common in young adults and no sex predilection and has generally been present for months to years before progressive enlargement causes interference with the mobility of the tongue and disturbance of articulation and mastication. The authors have recently experienced dermoid cyst of the floor of mouth which was confirmed histopathologically.
( Min Jea Shin ),( Dae Won Kim ),( Yeon Joo Choi ),( Hyun Ju Cha ),( Sung Ho Lee ),( Sunghou Lee ),( Jinseu Park ),( Kyu Hyung Han ),( Won Sik Eum ),( Soo Young Choi ) 생화학분자생물학회(구 한국생화학분자생물학회) 2020 BMB Reports Vol.53 No.2
Glutaredoxin 1 (GLRX1) has been recognized as an important regulator of redox signaling. Although GLRX1 plays an essential role in cell survival as an antioxidant protein, the function of GLRX1 protein in inflammatory response is still under investigation. Therefore, we wanted to know whether transduced PEP-1-GLRX1 protein inhibits lipopolysaccharide (LPS)- and 12-O-tetradecanoyl phorbol-13-acetate (TPA)-induced inflammation. In LPS-exposed Raw 264.7 cells, PEP-1-GLRX1 inhibited cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), activation of mitogen activated protein kinases (MAPKs) and nuclear factor-kappaB (NF-κB) expression levels. In a TPA-induced mouse-ear edema model, topically applied PEP-1-GLRX1 transduced into ear tissues and significantly ameliorated ear edema. Our data reveal that PEP-1-GLRX1 attenuates inflammation in vitro and in vivo, suggesting that PEP-1-GLRX1 may be a potential therapeutic protein for inflammatory diseases. [BMB Reports 2020; 53(2): 106-111]