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장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
Hak Seon Lee,Hyun Il Shin,Shin Hyeong Cho,Jong Yul Roh 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.10
This study was performed to recognize species composition of Anopheline mosquitoes and infection rates of Plasmodium vivax in the northern part of South Korea. Adult mosquitoes were collected at 9 Republic of Korea (ROK) army installations in northern part of Geyonggi Province near the demilitarized zone (DMZ) using black light traps. Polymerase chain reaction (PCR) was used to identify collected Anopheline specimens and detect P. vivax from them. During June to August 2016, total 481 anopheline mosquitoes were collected and identified. Anopheles kleini was the most frequently collected (56.1%), and followed by An. pullus (16.6%), An. sinensis (16.2%), An. belenrae (7.5%) and An. lesteri (1.5%). 6 pools (4.0%) were positive for P. vivax among 150 pools. The minimum infection rates (MIR) was 1.24. Our ongoing study will provide a meaningful data for the effective malaria elimination strategy.
Park Ki Beom,Roh Jong Yul,Kim Seong Yoon,Kim Nam‐Yeon,Jo Yong Hun,Jeong Rae‐Dong,Lee Wook‐Gyo,Lee Hee‐Il,Cho Shin‐Hyeong,Lee Yong Seok,Han Yeon Soo 한국곤충학회 2021 Entomological Research Vol.51 No.1
The Asian longhorned tick, Haemaphysalis longicornis, is widely distributed in China, Japan, and Korea and may transmit infectious diseases. Severe fever with thrombocytopenia syndrome (SFTS) is an important tick‐borne disease caused by the SFTS virus (SFTSV). Deep sequencing to confirm the presence of SFTSVin ticks has not been reported in Korea. To detect SFTSV, RNA was extracted from tick samples and analyzed using high‐throughput deep sequencing. Based on BLASTN results, numerous SFTSV reads were identified. Moreover, a nearly complete genome of SFTSV (JNU‐1 isolate) was obtained using Sanger sequencing. The genome of the JNU‐1 isolate includes three segments of 6,286, 3,299 and 1,642 nucleotides (nt) termed large (L), medium (M), and small (S), respectively. Also, phylogenetic and recombination analyses for each segment of SFTSV were performed using the JNU‐1 isolate. The three segments of JNU‐1 isolate were closely related to the genotype B known human‐derived Korean SFTSV isolate; the JNU‐1 isolate showed no recombination sites with other isolates. This study is the first report of detection of SFTSV from ticks using deep sequencing in Korea and provides information on the genetic diversity of SFTSV in East Asia.
최종효,박세경,노미오,정찬희,정정화,박형규,김여주,목지오,김상진,김철희,변동원,유명희,서교일 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1
Severe hypertriglyceridemia is a rare condition in pregnancy, which can be a life-threatening complication if the degree of hypertriglyceridemia is severe enough. Most cases of severe gestational hypertriglyceridemia that have been reported previously in the literature were caused by genetic mutations or familial. hypertriglyceridemia secondary to lipoprotein lipase deficiency or apolipoprotein C-II deficiency. but reports of severe gestational hypertriglyceridemia is rare in korea. We report a case of recurrent severe hypertriglyceridemia induced pancreatitis in pregnancy. 임신 중에 중증 고중성지방혈증은 드물게 발생한다. 하지만 중증 고중성지방혈증에 의해 중증의 췌장염이 발생할 경우 산모나 태아에게 치명적인 합병증이 될 수 있다. 저자들은 임신시 재발한 고중성지방혈증에 의해 발생한 췌장염 중례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.
연구보문 : 자연과학; 생장억제제 및 건조제 처리가 호밀 생육 및 종자에 미치는 영향
조상균 ( Sang Kyun Cho ),박형호 ( Hyeong Ho Park ),오영진 ( Young Jin Oh ),조광민 ( Kwang Min Cho ),장윤우 ( Yun Woo Jang ),송태화 ( Tae Hwa Song ),박태일 ( Tae Il Park ),강현중 ( Hyun Jung Kang ),노재환 ( Jae Hwan Roh ),박광근 ( 한국국제농업개발학회 2013 韓國國際農業開發學會誌 Vol.25 No.3
Desiccant was treated to find a way to shorten clum length and protect lodging of rye with Ethephon and a way to advance the harvest time without affecting germination. The results of the desiccant process are as follows for the change of harvest time and seed quality. As for Ethephon treatment, the earing date was delayed two days at the concentration of 250 ppm for the booting stage that when there is no treatment, 5 days later at the concentration of 1,000 or more ppm but no difference for the flowering and maturity stage. The culm length getting shorter as the concentration of Ethephon is higher and the decreasing rate of culm length damaged is 40.1% for 1,500 ppm of booting stage, which is the most effective processing, and the base part culm length damage rate is bigger than the superior upper part culm length decrement rate. Ther was no difference according to the treatment at the number of spike, culm and litter weight but one thousand grain weight was slightly higher in the treatment. There was no any difference in the rate ratio of germination. Yield tended to increase regardless of processing concentration. It reached up to 8% at maximum. The treatment with Ethephon turned out to be the most effective at 1,000 ppm during heading date-time. The number of days it takes from the desiccant treatment to the moisture content for harvesting time is respectively 20 days for seeds of 30 day-treatment, 10 days for seeds of 35 to 45 days-treatment and 5 days for seeds of 50 day-treatment.. As for the harvest time after treatment of desiccant, the treatment at 30th days after the earing is 14 days earlier than the culture by conventional methods, 9 days earlier for the treatment at 35th to 40th day, 4 days earlier for the treatment at 45th to 50th day. When treatment of desiccant is implemented, the one thousand grain weight is heavier as the number of days of treatment gets later. The ratio of germination gets higher as the number of days of treatment after heading gets later but there is no statistically significant difference treated 40 days after the heading. As for the yield of seeds are 30% compared to the culture by conventional methods for the treatment of 30 days after the heading, 48% compared to the culture by conventional methods for the treatment of 35 days after the heading, and 74% compared to the culture by conventional methods for the treatment of 40 days after the heading. Seed quality decreased a bit but it had still eligible as seed. The processing timing of desiccant for the earliest harvest was 40 days after heading date-time during which germination was not affected.
Survey on major pest incidence of rice in 2018
Sung-Jun Hong,Kyong-Jae Lee,Ui-Seok Chae,Hyeong-Il Roh,Jun-yong Chung 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
전국 136개 시군에 있는 690개소 벼 관찰포에서 12종의 주요 해충을 6월 1일부터 9월 16일까지 15일 간격으로 총 8회 조사한 결과를 국가농작물병해충관리시스템(NCPMS)을 통하여 수집하였다. 2018년도 벼 주요해충 12종의 총 발생 추정면적은 94,049ha로 재배면적 대비 12.7%에 발생되었다. 발생면적이 가장 많았던 해충은 먹노린재로 해충 총 발생면적의 34.9%인 32,779ha(재배면적 대비 4.4%)에서 발생이 확인되었다. 2018년 먹노린재 발생은 평년의 346%, 전년의 155% 수준으로 최근 몇 년간 계속해서 발생이 증가되고 있는 추세이다. 특히 전남(15,191ha)과 충남 (10,041ha) 지역에서 발생이 많은 것을 확인할 수 있었다. 먹노린재 다음으로는 벼물바구미 17,711ha(재배면적 대비 2.4%), 흰등멸구 14,885ha(재배면적 대비 2.0%), 혹명나방 9,130ha(재배면적 대비 1.2%), 애멸구 4,960ha(재배면적 대비 0.7%) 순으로 발생이 많았다. 10년간 평균간 비교하여 발생이 증가된 해충은 먹노린재 1종이었으며 나머지 11종은 발생이 감소된 것으로 확인되었다. 결론적으로 2018년 벼 주요해충의 발생정도는 전년대비 59%, 10년간 평균 대비 38% 수준으로 발생이 낮은 경향임을 알 수 있었다.
<i>In situ</i> characterization of the field-emission behaviour of individual carbon nanotubes
Kim, Chang-Duk,Jang, Hoon-Sik,Lee, Sung-Youp,Lee, Hyeong-Rag,Roh, Yong-Suk,Rhee, Il-Su,Lee, Eui-Wan,Yang, Hee-Sun,Kim, Do-Hyung IOP Pub 2006 Nanotechnology Vol.17 No.20
<P>The current–voltage (<I>I–V</I>) characteristics of carbon nanotubes (CNTs) during field emission were investigated by <I>in situ</I> imaging and field-emission (FE) measurement inside a field-emission scanning electron microscope (FE-SEM). A primary electron of the FE-SEM could induce and enhance a large stimulated electron emission from a CNT which might be due to the strong local field on the tip of the CNT in the presence of an applied voltage. FE of bent nanotubes (BNTs) can initially occur after they are fully straightened or it can start in the bent state (during geometrical straightening) as the applied field increases. The FE from a single CNT follows FN (Fowler–Nordheim) behaviour with a single linear slope in the FN plot. The FE from two nanotubes with a geometrical change during FE showed transition of the FN slope from the low voltage to the high voltage region, which could be due to interactions between two dynamic neighbouring BNTs.</P>
연구보문 : 자연과학 ; 동계 사료용 맥류와 하계 사료용 옥수수 작부체계 연구
조상균 ( Sang Kyun Cho ),조광민 ( Kwang Min Cho ),박태일 ( Tae Il Park ),박형호 ( Hyeong Ho Park ),노재환 ( Jae Hwan Roh ),최인배 ( In Bea Choi ),오영진 ( Young Jin Oh ),송태화 ( Tae Hwa Song ),김기종 ( Kee Jong Kim ),박기훈 ( Ki 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3
This experiment was carried out for two years from 2010 to 2011 in Kimjae city to provide basis of ``Winter forage crop-Summer forage corn`` cultivation system in southern area of Korea. The cultivars tested were ``Gokwoo`` as rye, ``Kumgang`` as wheat and ``Youngyang`` as barley as winter forage crops and ``Kwangpyeongok`` as corn for the summer forage crop. Regarding to winter forage crops, biomass of rye in fresh weight was 301.4 ton/ha and its income indicated 1,841 thousands Korean Won (KRW)/ha, an increase of 141% compared to naked barley grain production(NBGP). Biomass of barley was 30.6 ton/ha and the income showed 3,151 thousand KRW/ha, an increase of 242% compared to NBGP. Biomass of wheat recorded as 40.5 ton/ha with the most productive result among three winter forage crops and the income was 3,740 thousand KRW/ha, meaning 287% increase in comparison with NBGP. Regarding to summer forage corn cultivation, biomass production after rye was 56.7ton/ha in fresh weight and its income gained 4,731 thousand KRW/ha with an increase of 88% compared to single cropping rice(SCR). Biomass after barley produced 51.4ton/ha and the income was 3,828 thousand KRW/ha, showing a increase of 71% compared SCR. Biomass after wheat recorded as 31.0 ton/ha with the lowest productivity among three summer forage cultivations after each winter forage crops and the income of 372 thousand KRW/ha, an increase of 7% in comparison with SCR. With regard to total roughage production of each winter-summer forage crop combinations, total biomass production of ryecorn system was 87.1 ton/ha and the income recorded 6,572 thousand KRW/ha, similar to that of NBGP plus SCR. Biomass of barley-corn system produced 87.4ton/ha and the income was 6,979 thousand KRW/ha, a 105%-rise over that of NBGP plus SCR. Biomass of wheat-corn system recorded 71.6 ton/ha with the lowest result among three winter-summer forage corp combinations and the income of 4,112 thousand KRW/ha with an growth of 62% in comparsion with that of NBGP plus SCR.