컴퓨터 작업 시 의자 등받이 위치가 근육 활성도에 미치는 영향

김민우,변승진,이경은,정소영,조주영,최원자,최찬양,김경 대구대학교 특수교육재활과학연구소 2011 再活科學硏究 Vol.29 No.1

이 연구는 컴퓨터 작업시 의자 등받이 위치가 근육활성도에 미치는 영향을 알아보기 위해 36명의 근골격에 문제가 없는 성인 남녀가 참가하였으며 대상자들은 등받이가 뒤에 있는 의자와 등받이가 없는 의자, 등받이가 앞에 있는 우리들 의자를 무작위로 배정하고 동일한 컴퓨터 작업을 실시하게 하였다. 실험 중, 표면근전도기를 사용하여 의자에 따른 위등세모근, 머리널판근 그리고 척주세움근의 근활성도 변화를 측정하였다. 이 연구의 결과를 종합해보면 등받이가 앞에 있는 의자는 허리 근육의 부담을 줄이지만 목근육에 부담이 늘어나고 등받이가 뒤에 있는 의자와 없는 의자는 허리근육에는 다소 무리가 가지만 목근육에는 부담이 덜하다는 것을 알 수 있었다. 이러한 결과로 환자의 증상에 다라 컴퓨터 작업을 하는 동안 의자 등받이의 위치를 조절하여 치료에 도움이 될 수 있다고 생각되어진다. Objective : In this study, we checked and observed people's change of body muscle and muscle activity who do computer work on different chairs. We set three kind of chairs which one is a stool and another one is the back is fixed, and the other one is the back is fixed in front of chair. Subject : Accounting for 36 health men and women, we divided these people to 3 groups and put them on the three cases(position 1, position 2, position 3). We measured muscle activity of upper trapezius, Splenius Cervics, Erector Spinae from the groups by using surface electromyogram system. Methods : The standard of the electromyogram was 'reference voluntary contraction', and we carried out 'one way anova' to compare muscle activity of three groups. Results : In position 1, reference voluntary contraction of upper trapezius muscle activity was 123.2821%, Splenius Cervics was 141.7526%, and Erector Spinae was 254.5233%. In position 2, reference voluntary contraction of upper trapezius muscle activity was 132.9395%, Splenius Cervics was 141.7526%, and Erector Spinae was 246.6540%. In position 3, reference voluntary contraction of upper trapezius muscle activity was 190.6487%, Splenius Cervics was 270.2332%, and Erector Spinae was 182.1021%. Both upper trapezius and Splenius Cervics muscle activity of position 3 group was higher than the others groups. In position 1 group, Erector Spinae muscle activity was hight than the other groups. And either was position 2 group's(p<0.05). Conclusion : Therefore the chair which is the back is fixed in front is more comfortable for waist muscle but it's not good for neck. And the other chairs are better in waist muscle but not in neck muscle. So far, when we do a computer work, it's prefer to sit on the group 1&2's chairs to reduce neck muscle's stress and sit on group 3's chair to reduce waist muscle's stress.

곁순의 화학적 방제가 연초식물의 생장량에 미치는 영향

이재흥,석영선,신주식,정찬문 충북대학교 엽연초연구소 2001 煙草硏究 Vol.18 No.-

This study was carried out to compare the effects of suckercides - Fatty alcohol(FA), Maleic hydrazide(MH) and Butralin - on the sucker control and growing characters of flue-cured tobacco leaves. Among the three suckercides, Butralin was treated at three different times, one day before topping, topping day and one day after topping, and at two different concentration, 1/30 and 1/60 water solution. The results are summarized as follows. Suckercide treated plot showed higher growth and weight of upper leaves than not-treated plots did. MH treated plot decreased numbers, fresh weight and dry weight of suckers compared to the other treated plots, and made the leaves shape narrow. The effect of Butralin on sucker control was lower than that of MH, but higher than that of FA. The yields when treated Butralin decreased compared to the yields when treated MH. Though there were no significant differences of yields and growing characters of leaves among the plots of three concentrations and two times of treating Butralin, it is recommended to apply 1/60 water solution of Butralin at topping time.

Effect of Low Temperature on Floral Organ Development in Rosa hybrida ‘Pink Shine’

Yeong Chan Shin,Je Yeon Yeon,Ho Jin Lee,Da Yeon Kim,Min Ji Kim,Bo-Kyeong Kang,Yuri Lee,Ha Ram Yang,Wan Soon Kim 한국원예학회 2023 한국원예학회 학술발표요지 Vol.2023 No.5

Relationship between Floral Organogenesis and FMT by Transcriptome Analysis in Roses under Different Temperature Conditions

Yeong Chan Shin,Je Yeon Yeon,Ho Jin Lee,Da Yeon Kim,Bo-Kyeong Kang,Yuri Lee,Ha Ram Yang,Wan Soon Kim 한국원예학회 2023 한국원예학회 학술발표요지 Vol.2023 No.10

Oligonol, a low-molecular-weight polyphenol derived from lychee fruit, protects the pancreas from apoptosis and proliferation <i>via</i> oxidative stress in streptozotocin-induced diabetic rats

Park, Chan Hum,Lee, Joo Young,Kim, Min Yeong,Shin, Sung Ho,Roh, Seong-Soo,Choi, Jae Sue,Chung, Hae Young,Song, Yeong-Ok,Shin, Yu Su,Yokozawa, Takako The Royal Society of Chemistry 2016 Food & Function Vol.7 No.7

<P>We have identified the effects of oligonol, a low-molecular polyphenol derived from lychee fruit, on diabetes-induced pancreatic damage <I>via</I> oxidative stress. Oligonol was orally administered at 10 or 20 mg (kg d)<SUP>−1</SUP> for 10 days to streptozotocin (STZ)-induced diabetic rats, and we assessed the changes in the serum glucose and insulin levels, as well as those of body weight and food and water consumption. In addition, analyses of the weight, insulin content, reactive oxygen species (ROS) level, and western blots of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-4 (Nox-4), p22<SUP>phox</SUP>, p47<SUP>phox</SUP>, phosphor-c-Jun N-terminal kinase (p-JNK), Bax, cytochrome <I>c</I>, caspase 3, pancreatic-duodenal homeobox (PDX-1) and cyclin E were also performed in the pancreas. However, these unfavorable outcomes under diabetes were reversed by oligonol administration. Oligonol treatment led to significantly attenuated histological damage in the pancreas. In conclusion, this study suggests that oligonol protects the pancreas from Bax and PDX-1 <I>via</I> oxidative stress for the prevention or delaying of diabetes mellitus.</P>

과학 학습 과정에서 나타나는 중간언어의 유형 및 과학 언어에 대한 이해수준 변화에 따른 중간언어의 특징

양찬호 ( Chan Ho Yang ),김지영 ( Ji Yeong Kim ),신필여 ( Pil Yeo Shin ),위햇님 ( Hat Nim We ),신명환 ( Myung Hwan Shin ),강도영 ( Do Young Kang ),김소요 ( So Yo Kim ),민현식 ( Hyun Sik Min ),김찬종 ( Chan Jong Kim ),노태희 ( Tae H 한국과학교육학회 2011 한국과학교육학회지 Vol.31 No.5

이 연구에서는 중학교 3학년 학생들이 물리변화와 화학변화를 나타내는 현상을 구분하고 설명하는 과정에서 사용하는 중간언어를 집단토의 활동과 사후면담을 통해 조사하였다. 학생들이 사용한 언어를 귀납적으로 분석하여 중간언어의 유형을 분류하고, 과학 언어에 대한 이해수준의 변화에 따른 중간언어의 특징을 조사하였다. 연구 결과, 학생들의 중간언어는 그 의미와 형태에 따라 세 가지 유형으로 나타났다. 중간언어 유형 1은 과학적 의미를 나타내기 위해 과학 언어와 일상 언어를 함께 사용하는 언어 사용 방식으로, 과학 언어에 대한 이해수준 변화와 관련 없이 대부분의 학생들이 사용하는 것으로 나타났다. 중간언어 유형 2는 과학적 의미를 나타내기 위해 일상 언어만을 사용하는 언어 사용 방식으로, 과학 언어에 대한 이해 가 높은 학생들에게서만 나타났다. 중간언어 유형 3은 언어를 다중적인 의미로 사용하는 언어 사용 방식으로, 과학 언어에 대한 피상적 이해를 지닌 학생들에게서 주로 나타났다. 이에 대한 교육학적 함의를 논의하였다. In this study, we investigated the interlanguage of ninth graders that was used to classify and explain the phenomena related to the change of the matters in a group discussion and semi-structured interview. The patterns of the interlanguage were classified and analyzed through the change of their understanding of science languages. The analyses of the results suggested that the interlanguage of the students are classified into the three patterns according to its meaning and form. Pattern 1 is science language used in combination with everyday language to express scientific meaning. This was used by most students regardless of the level of understanding of science languages. Pattern 2 is everyday language used to show scientific meaning, which was used by students who had better understanding of science languages than the others. Pattern 3 is using languages with multiple meaning, which was mainly used by students who have superficial understanding of science languages. Educational implications of these findings are discussed.

Sampling of Unaspis yanonensis (Hemiptera: Diaspididae) in Citrus Orchards, Jeju

Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Seong Keun Kang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05

Arrowhead scale, Unaspis yanonensis, is a serious scale insect pest of citrus in Jeju. The sticky taping of 1.0 cm diameter twig was a good survey method for arrowhead scale crawler. There are three times crawler occurrence season - late May to early July, late July to middle September and late September to late October. But the third occurred crawlers are all died during overwintering in open-field groves. This study was conducted to provide information on efficient sampling plan for arrowhead scale within the tree. Twig and fruit was fit for secondary sample unit by two-stage variance analysis. Both sample number per tree (primary sample unit) was eight twigs or fruits. Taylor’s power law was better described the distribution characteristic of arrowhead scale than Iwao’s patchiness regression. The slope of both linear regressions was greater than “1” which means aggregative distribution pattern. Minimum sample size to estimate the density was calculated using by two parameters of Taylor’s power law. To estimate the mean density on twig and fruit by binomial sampling plan, the optimum tally threshold was 5 and 7, respectively.

Characteristics of Spatial Distribution of Bemisia tabaci in Tomato Greenhouses, Jeju

Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Seong Keun Kang 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05

Sweet potato whitefly (SPW), Bemisia tabaci, is the most serious pest of greenhouse tomato as a vector of tomato yellow leaf curl virus since 2008 in Jeju. This study was conducted for within-plant distribution of SPW nymphs on leaves and the characteristic of spatial distribution of SPW adults using by yellow-color sticky trap in greenhouse-grown tomato plants. The nymphs of SPW were mainly distributed on leaves of mid-lower stratum in three stratum of tomato plant. They were also more distributed on three to four leaflets from basal part in a leaf. Ten plots and three plants per plot were appropriated to estimate of mean density of SPW nymph using by visual inspection in a tomato greenhouse. The more SPW adults were caught on horizontally placed sticky trap above 50~80 cm than vertically placed sticky trap above tomato canopy. The horizontal direction trap should be placed in opened site. SPW adults were shown the aggregated distribution pattern using by Taylor’s power law (TPL) and Iwao’s patchiness regression (IPR) model which are commonly used for spatial distribution pattern analysis. TPL was showed better description than IPR for spatial distribution pattern of SPW adults. The required number of trap tended to decrease according to increase the mean density of SPW adult

Utilization of Trap for Efficient Management of Cryptic Mealybug, Pseudococcus cryptus, in Citrus Orchards, Jeju

Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Sang Soon Lee 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

The males of cryptic mealybug, Pseudococcus cryptus, were attracted on trap baited with or without a synthetic sex pheromone. The attractiveness of sex pheromone trap was higher than yellow-color sticky trap, but both phenologies were similar. There was a positive relationship between mean density of 2nd nymph to adult cryptic mealybug and the density of the male caught on trap. The density of cryptic mealybug per tree was higher correlated with yellow-color sticky trap than sex pheromone trap. The pattern of cryptic mealybug male occurrence had two to three cohorts in a generation resulted from overwintering stage. The maximum occurring time of 1st to 2nd nymph stage could be estimated from the peak time of trap catch by effective temperature accumulation. The higher and lower threshold temperature was estimated as 10.9 and 32.6℃, respectively and its thermal constant was 360 degree-day. The cryptic mealybug parasitoid, Anagyrus sp., which was first recovered in Jeju in 2009, was well attracted on yellow-color sticky trap. There was a high correlation between the density of Anagyrus sp. and of cryptic mealybug males caught on trap.

Overwintering and Flight Phenology of Spodoptera exigua (Lepidoptera: Noctuidae) in Jeju

Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Seong Keun Kang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.10

Beet armyworm (BAW), Spodoptera exigua (Hübner), is a polyphagous lepidopteran pest mainly distributed in tropical and subtropical regions. BAW are known to migrate long distances to find suitable host plants and environmental condition. The possibility of its overwintering in temperate regions has been suspected. This study was conducted for investigating overwintering and phenology of BAW using by sex pheromone trap in Jeju during 2007 to 2011. BAW was able to overwinter at pupae stage regardless of temperature of winter season in Jeju. The times of BAW caught first on traps were different by surveyed years - early March in 2007, middle March in 2008 and 2011 and early April in 2009 and 2010. The times of BAW caught on trap tended to be more dependent on temperature variation during on November and December than on mean temperature of winter season. The peak season of adults of the overwintering generation was early to middle of May. The results of seasonal periodicity of BAW monitored by sex pheromone trap during 2009 and 2010 indicated that five generations were passed in Jeju. The peak season of 1st generation was on middle of April, 2nd generation on middle of July, 3rd generation on early of August, 4th generation on late of August and 5th generation on middle of September. There were similar patterns by different above sea levels except the season of overwintering generation adults occurrence (March to May).