• Journal of Digital Policy
• /
• v.3 no.2
• /
• pp.15-22
• /
• 2024

This study was conducted to identify the cause of turtle neck syndrome that occurs in a pharmacists and the relationship between the height and table height and to suggest a table height appropriate for height. By conducting correlation and regression analysis of the turtle neck index, NDI, and VAS. As a result of calculating, the relationship between the pharmacist's height and table height, which is good for preventing turtle neck, is less than about 65cm, and it was proven that the height of the table is a major factor in causing or worsening turtle neck syndrome. It is believed that further follow-up research is needed to determine whether the calculated through this paper is effective and can be applied to other occupational groups.

• Korean Journal of Agricultural and Forest Meteorology
• /
• v.5 no.1
• /
• pp.30-35
• /
• 2003

The study of the scars formed on the bark of pine trees damaged by forest fire was carried out in the burned area of Samchuk and Donghae in 2000. Fire scars were formed on the bark of trees when fire passed by the tree. Fire scarring is usually found on the windward and leeward sides of the tree. Fire spread was analyzed topographically using the fire scars formed at the tree stem. Fire spread was closely related to the shape, slope and direction of the forestland. Four fire direction types are classified according to the shapes of the forestland. The height of the fire scar was higher on the leeward side than on the windward side of the trees studied. The burnt area of the total bark of the tree was over 30% in dead trees and below 12% in living trees. The regression model of the burnt stem area using the height of the fire scar, the diameter of breast height and the height of tree was Y=-2.484${\times}$Height＋0.04199${\times}$D.B.H-1.686${\times}$Windward＋11.172${\times}$Leeward＋23.432(r=0.936, F=409.968, P＞0.0001).

• Journal of Korean Society of Forest Science
• /
• v.100 no.3
• /
• pp.441-448
• /
• 2011

The objective of this study was to clarify the distribution, host preference and habitat characterstics of the endangered mistletoe species, Loranthus tanakae in Korea. Seven sites were selected for sampling in Gangwon Province, located in middle of Korea. Parameters including DBH, attached height, twig death, and the number of L. tanakae and Viscum album var. coloratum per tree for all infected individuals were investigated. One thousand, two hundred and seventy L. tanakae plants were found on the 420 host trees with 665 V. album var. coloratum on 227 of the trees. The infested host trees belonged to eight species and one variety species from six genera and five families. The highest percentage (86.9%) of individuals of L. tanakae were growing on Fagaceae. The infected trees occurred between altitudes of 420 m and 1,250 m above the sea level, but most of them were between 600 m and 900 m. The mean DBH and heights of parasitism were 38.6 cm and 13.0 m, respectively. Twig death was also observed on 300 host trees (71.4%) and 1.5 twig per tree. Most of the populations and the distribution of L. tanakae were highly affected by DBH out of some individual tree characteristics.

• Korean Journal of Medicinal Crop Science
• /
• v.11 no.5
• /
• pp.340-346
• /
• 2003

This study was carried out to improve cultivation techniques by low cost and labour saving in ginseng (Panax ginseng C. A. Meyer) seedling production, by elucidating proper ratio virgin soil and organic fertilizer, suitable height of front piller. The obtained results are as follows ; The optimal ratio of white decomposition of virgin soil and organic fertilizer was 10:1 for good yield of standard seedling, The fittest height of front piller was 150 cm because of both good seedling growth and yield. The cost for production of seedling of ginseng could be reduced by both optimal ratio of virgin soil, organic fertilizer and selection of front piller height.

• Journal of the Korean Wood Science and Technology
• /
• v.35 no.6
• /
• pp.43-49
• /
• 2007

Anatomical properties of Kenaf (Hibiscus cannabinus L.) planted in a reclaimed-land of Korea were examined to understand the growth characteristics by an optical and scanning electron microscopy. The samples of kenaf were taken from four positions of the stem (3, 35, 70, 105 cm above from the ground) in four growth periods (July. August, September, October) from seeding planted in the middle of May. Bast fiber, phloem rays, cortex parenchyma cells and sieve tube members were observed in phloem, and vessel elements, fibers and rays in xylem. Solitary and multiple radial pores existed in xylem. The cell types of ray parenchyma in radial section were procumbent, upright, and square. The intervascular pitting showed an alternate type. Xylem proportion, the number of bast fibers and dimension of phloem rays increased with increasing growth period, and decreased with increasing stem height. The proportion of multiseriate rays was higher than that of uniseriate and biseriate rays in xylem with increasing growth period. On the other hand, The proportion of multiseriate rays was lower than that of uniseriate and biseriate rays in xylem with increasing stem height.

• The Journal of the Acoustical Society of Korea
• /
• v.30 no.2
• /
• pp.92-99
• /
• 2011

In Japan, bang machine has been considered to have problems about not only the impact force and frequency response which are different from the real impact sources such as children's jumping and running, but also damage in the wooden structure housing. Therefore, a new impactor for lower impact force to prevent demage in wooden structure housing was developed. The impact ball was adopted as the second standard impact source in JIS A 1418-2 and ISO 140-11. In the present study, floor impact sounds generated by impact ball with drop heights in four floors of mock-up building of Building Research Institute (BRI) similar to typical Japanese wooden structure housing were investigated and also compared to jumping sound. The results show that Impact ball sound dropped at 10 cm to 30 cm was most similar to jumping sound. And The impact sound levels at 250 and 500 Hz were more sensitive to drop height than other lower frequencies. The error that may occur from the difference of height of 10 cm up and down based on the standard drop height caused by the impact ball operated by human hands was approx. 1 dB or less only in its value of characteristic, but it must be carefully taken into Impact ball in the Korea Standard.

• 대한공업교육학회지
• /
• v.38 no.1
• /
• pp.259-274
• /
• 2013

Culture is already deeply imbued in our lives. The furniture has become a way of life and the human became part of the culture. In this study, the aim is to explore the traditional furniture that is projected through the culture as a lifestyle. Therefore, the purpose of this study is to explore the cultural implication in Korean traditional wooden furniture. Specific research questions in this study are as follows; 1) How to reflected house structure culture at traditional woodcraft furniture? 2) How to reflected interior space culture at traditional woodcraft furniture? 3) How to projected life form style culture at traditional woodcraft furniture? 4) How to harmonize between modern life culture and traditional woodcraft furniture? In order to achieve the purpose of this study, the literature of review was used masters of Korea's traditional woodcraft furniture. To collect information of Korean traditional furniture, the furniture was selected representative pieces of Korean Joseon Dynasty and interviewed an important intangible cultural asset somokjang. Based on the explore of Korean traditional furniture, the conclusions of this study are as follows; first, in the viewpoint of house framework culture, most of traditional furniture was made u sing a narrow interior space and was to be placed in close contact with the walls, and was developed as a type of molding on the front of the furniture to pursue beauty. Second, in the viewpoint of ondol culture, traditional furniture was closed to the wall by using low height furniture and furniture legs the structure punghyeol was used to reflect the phenomena of convective heat and humidity. Third, in the viewpoint of life form culture, traditional furniture was made that sat-down at eye level configuration is proportional to its size and height and appropriately been made. And patterns reflect the wishes of most things in nature and to be blessed with longevity origin were used in the decoration of wooden furniture. Finally, in the viewpoint of modern life culture, traditional furniture is simple but not dirty, and splendid but not luxurious. So although traditional wooden furniture are in any room or place, never discouraged by the dignity.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2015.05a
• /
• pp.380-380
• /
• 2015

국내 소하천에 설치된 대표적인 수공구조물은 교량, 보, 암거 등이 있으며 소교량은 전체 소하천 구조물의 56%를 차지하고 있어 태풍 및 집중호우로 인한 피해사례가 다양하게 보고되고 있다. 소교량에서의 대표적인 피해는 교각기초의 세굴, 여유고 부족으로 인한 파괴 등이 대표적인 피해사례로 알려져 있다. 이와 더불어 유송잡물 집적으로 인한 피해사례가 발생하고 있는데 교량에서의 유송잡물에 대한 피해는 유송잡물 집적으로 인한 교량전도, 수위상승으로 인한 제방월류, 압력흐름 증가로 인한 하상세굴 등의 피해 등 다양한 피해가 발생하는 것으로 보고되고 있다. 이러한 유송잡물로 인한 피해를 저감하기 방법으로는 유송잡물 차단, 우회시설을 설치하거나 충분한 교량의 여유고를 확보하는 방법 등이 있다. 여유고 확보를 위해서는 유송잡물로 인한 교각에서의 수위변동 특성을 검토할 필요가 있다. 따라서 본 연구에서는 유송잡물의 크기변화에 따른 교각주변에서의 수위변동을 실규모-모형실험으로 연계하여 영향을 검토하고자 하였다. 수리실험은 소교량 대상 실규모 유송잡물 집적실험과 집적형태를 반영한 수리특성실험으로 구성하였다. 이를 위해 1/1 규모의 실규모 소교량 교각모형을 대상으로 유송잡물(목본류, 초본+목본류)에 대한 집적실험을 수행하고 집적형태를 파악하였다. 집적형태를 반영한 수리실험은 실규모 실험결과를 토대로 유송잡물 모형을 제작하였으며 잡물의 크기변화에 따른 수위변동 영향을 검토하였다. 실험결과 유송잡물의 집적형태는 전반적으로 직사각형 형태로 집적이 이루어지고 있는 것으로 나타났다. 이러한 형태를 반영한 수리실험결과 유송잡물의 높이가 교각두께의 1배 미만일 경우 상류단에서의 수위변동이 미미한 것으로 나타났다. 폭비와 길이비 변화에 따른 수위변동은 폭비변화에 비해 높이비 변화에 민감하게 영향을 받는 것으로 나타났다. Fr에 따른 수리실험에서도 높이비가 1이상일 경우 상류단에서의 수위상승이 발생하는 것으로 확인되었다.

• Journal of Korea Entertainment Industry Association
• /
• v.13 no.5
• /
• pp.239-246
• /
• 2019

This study aims to examine the correlation between pectoralis minor, shoulder mobility, and neck range of motion on rounded shoulder posture for Life-care increase in Women university student. The 80 female adults with rounded shoulder posture were selected for this study. Measurements of shoulder height were obtained by measuring the rounded shoulder posture using a caliper. To measure the length of pectoralis minor, a tape measure was used to measure from the point where the 4th rib and sternum meets to the inferior medial side of coracoid process. Shoulder mobility was measured by holding fists in both hands, then raising one side of the elbow until the palm on that side can be placed on the back, while lowering the other side of the elbow until the back of the hand on that side can be placed on the back. Neck range of motion was used to measure the neck movement including the flexion and the extension, lateral flexion to the right or to the left, and rotation to the right or to the left. The results of this study showed that there are significant negative correlations between pectoralis minor index, shoulder mobility, and neck range of motion in rounded shoulder posture(p<0.05). From these results, in female students with rounded shoulder, the lateral flexion of the neck to the left decreased as the left shoulder mobility increased, the neck extension decreased as the right pectoralis minor shortened, and the rotation of the neck to the left decreased as the left shoulder mobility increased.

• Journal of Korean Society of Forest Science
• /
• v.79 no.2
• /
• pp.138-143
• /
• 1990

In mature stand of Japanese larch (Larix leptolepis(S. et Z.) Gordon) planted in 1925, heartrot damage was investigated by felling some infected trees with fruit bodies of two butt-rot fungi, Phaeolus schweinitzii and Sparassis crispa. Percentage of heartrot area on basal area of decay trees was 19.2-74.4, and the height reached by the decay was 1.2-5.5m. Percentage of decay volume was in the range of 2.2-13.4%, but the loss wood to the height reached by the decay amounted to 27.2% (range 13.1-37.1%) of whole volume, Decay damage caused by S. crispa was much greater than that caused by P. schweinitzii. Compressive strength ($52-77kg/cm^2$) and specific gravity (0.40-0.47) of rot wood was reduced to 77% and 39% respectively in maximum as compared to sound wood of healthy tree, and those of sound-looking wood close by heartrot to 42% and 26%. The current annual growth of trees with decay was fallen behind that of sound tree from eight to fourteen years after planting in D. B. H. and from twelve to twenty-one years after in volume.