• Journal of radiological science and technology
• /
• v.35 no.1
• /
• pp.25-33
• /
• 2012

Perception level and social position of radiological technologist influence satisfaction level of their job. This study aims to use foundational data to improve perception level and social position of radiological technologists. We conducted interviews and a fill-out survey with 233 students who have been majoring in health-related fields at five universities and colleges located in Busan and who finished internship programs. The study analyzed 233 answer sheets excluding 17 inadequate answer sheets using T-test, ANOVA and multiple regression analysis with SAS9.1. The mean score of perception level was $3.33{\pm}0.56$. The personal image of radiological technologist showed the best score($3.43{\pm}0.56$) whereas the social image showed the worst($3.12{\pm}0.58$). According to the classification of the subject, the answer, "radiological technologist is specialized job", showed the best score($3.99{\pm}0.79$). The answer "radiological technologist suffered from less stress and workload than others when they work usually" showed the worst score($2.88{\pm}0.98$). According to the classification of each health-related major, the mean score of students who are a major in the department of the radiological technologist was the best($3.46{\pm}0.46$) and the students who are major in department of the physical therapy was the worst($3.24{\pm}0.40$). The radiological technologist have to effort to make positive image in the hospital. It is possible to be developed their knowledge and professionalism by cooperating between school and hospital as well as advertising with mass madia.

• Journal of Aerospace System Engineering
• /
• v.14 no.5
• /
• pp.33-41
• /
• 2020

The landing gear of an aircraft is a device that absorbs and dissipates shock energy transmitted from the ground to the fuselage. Among the landing gears, the semi-active MR damper landing gear is supposed to show high-shock absorption efficiency under various landing conditions and secure the stability when out of control. In the case of the MR damper landing gear using an annular channel rather than orifice, Amesim, a commercial multi-physics program, is considered as more useful than the conventional two-degree-of-freedom model because the damping force generated by the pressure drop through the flow annular path can cause cavitation in the low-pressure chamber of the MR damper with a specific internal structure. In this paper, the main dynamic characteristics of the MR damper landing gear with an annular type flow path structure has been analyzed under the condition of cavitation. Based on the analysis results using Amesim, a design guideline for the MR damper flow path that prevents cavitation has been proposed based on the modification of the arrangement of internal components of the damper. The guideline was verified through a drop simulation.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.8 no.2
• /
• pp.157-165
• /
• 2005

The purpose of this study is to examine the relationship between land use patterns of riparian zones and water quality in the Geumho River watershed. A GIS database included digital land use maps (1:25,000), stream network extracted from digital topographic maps (1:5,000) and riparian zones maps by multi-buffering method. Pearson's correlation analysis was used to explain the relationship between the environmental conditions of a 30 meter buffer strip on each side and water quality. According to the result of investigation of riparian-level land use patterns, sub-watersheds on the lower Geumho River including Daegu metropolitan city were mainly developed as urban area such as residential, commercial and industrial ones, while sub-watersheds on the middle Geumho River and the main course of Nakdong River, agricultural ones such as a paddy, a dry field and an orchard. Meanwhile, the area-rate of riparian forests which play an important role in filtering nitrogen, phosphorus and sediment was estimated below the average 16%. The proportion of urban area in a 30 meter riparian bufferstrip had a negative correlation with water quality in each sub-watershed. But the proportion of forest area had a positive correlation with water quality. Henceforth, it is necessary to establish landscape planning for preparing and restoring the riparian buffer zones, concerning land form, soil type, the present land use pattern and economic aspects.

• Journal of the Korea Computer Graphics Society
• /
• v.14 no.4
• /
• pp.7-18
• /
• 2008

To realistically produce fluids such as smoke for the visual effects in the films or animations, we need two main processes: a physics-based modeling of smoke and a rendering of smoke simulation data, based on light transport theory. In the computer graphics community, the physics-based fluids simulation is generally adopted for smoke modeling. Recently, the interest of the particle-based Lagrangian simulation methods is increasing due to the advantages at simulation time, instead of the grid-based Eulerian simulation methods which was widely used. As a result, because the smoke rendering technique depends heavily on the modeling method, the research for rendering of the particle-based smoke data still remains challenging while the research for rendering of the grid-based smoke data is actively in progress. This paper focuses on realistic rendering technique for the smoke particles produced by Lagrangian simulation method. This paper introduces a technique which is called particle map, that is the expansion and modification of photon mapping technique for the particle data. And then, this paper suggests the novel particle map technique and shows the differences and improvements, compared to previous work. In addition, this paper presents irradiance map technique which is the pre-calculation of the multiple scattering term in the volume rendering equation to enhance efficiency at rendering time.

• Journal of The Korean Association For Science Education
• /
• v.31 no.5
• /
• pp.745-757
• /
• 2011

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.

• KSBB Journal
• /
• v.15 no.3
• /
• pp.299-306
• /
• 2000

Concern for the effects of toxic chemicals on the environment leads the search for better bioassay test organisms and test procedures. Photobacterium phosphoreum was used successfully as a test organism and the luminometer detection technique was an effective and simple method for determining the concentration of toxic chemicals. With EC50 a total of 14 chlorine substituted phenols benzenes and ethanes were used for the experiments. The test results showed that the toxicity to P. phosphoreum increased in the order of phenol > benzene > ethane and the toxicity also increased with the number of chlorine substitution. Quantitative structure activity relationship (QSARO) model can be used to predict EC50 to save time and endeavor. Correlation was well established with the QSAR parameters such as log P, log S and solvatochromic parameter(Vi/100 $\pi$, ${\beta}$m and am). The QSAR modeling was used with multi-regression analysis and mono-regression analysis. These analyses resulted in the following QSAR : $log EC_{50} =2.48 + 0.914 log S(n=9 R2=85.5% RE=0.378) log EC_{50}=0.35 - 4.48 Vi/100 + 2.84 \pi^* +9.46{\beta}m-4.48am (n =14 R2=98.2% RE=0.012) log EC_{50} =2.64 -1.66 log P(n=5, R2=98.8% RE=0.16) log EC_{50}=3.44 -1.09 log P(n=9 R2= 80.8% Re=0.207)$

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
• /
• v.4 no.4
• /
• pp.390-399
• /
• 1999

Siliceous and calcareous deep-sea core sediments were collected by a multiple corer from the KODOS (Korea Deep Ocean Study) area, northeast equatorial Pacific, to compare vane shear strengths measured by two different apparatuses and in different places of on-board and on-land laboratories. The apparatuses were 1) a hand-held vane with four blades of $2.0{\times}2.0$ cm, and 2) a motorized shear vane system with four blades of $1.0{\times}0.88$ attached on a rotational viscometer. Depth profiles of shear strengths of core samples determined by the apparatuses do not show any consistent difference. Also, there is no consistent difference between shear strength values measured on-board and on-land laboratories after storing the core samples for three months in a cold room by a motorized shear vane system. However, there are considerable differences between depth profiles of shear strengths measured at four different points (holes) of a core sample. Moreover, significant differences among the profiles of different tube samples from a multiple corer within a sampling station were observed. Heterogeneity in physical properties of each depth and sediment column, possibly due to bioturbation and bottom current flows, is likely responsible for the differences in the geotechnical properties.

• Proceedings of the Korea Society of Costume Conference
• /
• 2001.04a
• /
• pp.44-45
• /
• 2001

다양해지는 소비자들의 패션에 대한 개성적 표현 욕구에 따라 우리나라 미용산업은 헤어, 메이크업과 피부미용, 네일케어 분야로 전문화.세분화되면서 토탈 패션산업의 주요영역으로 성장하고 있다. 이러 한 토탈 패션의 등장으로 미용서비스에 대한 수요증가로 양적으로는 상당히 그 규모가 증가했음에도 불구하고, 서버스 품질에 대해서는 고객들에게 확실한 신뢰를 주지 못하고 있다. 이는 국내 미용업계가 미용서비스 제공자의 관점에서 일방적인 서비스를 창출하여 왔고, 고객이 바라는 서비스의 내용과 품질을 제대로 파악하지 못하고 있다는 사실을 의미하고 있다. 따라서, 본 연구는 미용실의 서비스품질의 구성 요인을 확인하고. 미용실의 서비스품질과 소비자 만 족과의 관계를 알아보는 것을 목적으로 한다. 이를 위한 본 연구의 연구문제는 다음과 같다. 첫째, 미용실의 서비스 품질을 결정하는 요인에는 어떠한 것이 있는가\ulcorner 둘째, 미용실의 서비스 품질 중 소비자 만족과 관련하여 상대적으로 중요한 서비스 품질 결정요인은 무엇인가\ulcorner 본 연구를 위한 예비조사에서는 개방형 질문(open-ended question)을 실시하였다. 예비조사결과 프랜차이즈 미용실, 시내중심가 미용실 그리고 집.직장 근처 미용실의 3가지 유형의 미용실은 그 규모나 소비 자 인식이 상이하여 미용실의 서비스품질 차원을 연구하는데 유용한 것으로 나타났다. 본조사에서는 설문지법을 이용하였으며, 그 대상은 서울 지역의 3가지 유형의 미용실을 이용하는 고객들중 2 20-30대의 주요 고객층으로 정하였고 편의 표집하였다. 분석방법으로는 신뢰도 검증을 위해서는 Cronbach's 외 alpha값을 활용하였고, 미용실의 서비스품질 차원의 개념 타당성을 알아보기 위하여 LISREL을 이용한 확인 적 요인분석(confirmatory factor analysis)을 실시하였다. 또한 미용실의 유형에 따른 서비스 품질의 차이를 알아보기 위해서 일원변량분석(one-way ANDV A)을 실시하였으며, 서비스품질 속성들 중 소비자 만족을 결정하는 요인들을 알아보기 위해서 다중 회귀분석(multiple regression analysis)을 실시하였다. 본 연구의 결과들을 요약하면 다음과 같다. 첫째, 미용실의 서비스 품질을 결정하는 요인으로 는 물리적 서비스(유형성, 접근성, 청결성), 판매원 관련 서비스(감정배려, 능력), 정책관련 서비스(점포운영, 명성, 신용카드) , 미용기술관련 서비스로 나타났다. 둘째, 미용실의 서비스 품질을 결정하는 요인들에 있어서 점포 유형간의 차이를 분석한 결과 전체적으로 응답자들은 프랜차이즈 미용실의 서버스 품질에 가장 만족했으며, 시내중심가 미용실과 집근처 미용 실 순으로 나타났다. 셋째, 미용실의 소비자 만족을 예측하는데 유의한 서비스 품질 결정 요일을 살펴보면, 프랜차이즈 미용 실은 청결성($\beta$ =.30), 감정배려($\beta$ =.54), 명성($\beta$ =.60), 미용기술관련 서비스 차원($\beta$ =.68)이 결정 요인으로 나타났다. 시내중심가 미용실은 청결성($\beta$ =.39), 직원의 능력($\beta$ =.49), 명성($\beta$ =.59), 미용기술관련 서비스 차원($\beta$ =.68)가 서비스 결정 요인이었고, 집근처 미용실은 청결성($\beta$ =.27), 감정배려 ($\beta$ =.57), 명성($\beta$ =.73), 미용기술관련 서비스 차원 ($\beta$ =.60)으로 나타났다. 이것으로 미용실의 소비자 만족을 예측하는데 유의한 서비스 품질 결정 요인은 청결성, 감정배려, 명성, 상품관련 서비스임을 알 수 있다. 본 연구의 방법론적 의미는 그 동안 개발된 소매점이나 패션점포의 서비스 품질에 대한 평기척도를 우리나라 미용실에 적용해 봄으로써 미용실의 특성인 유행성, 청결성, 미용실의 명성, 직원과의 친분 등을 포함한 미용실의 서비스 품질 차원과 그 신뢰성 과 유용성을 입증하였다는데 그 의미가 있다. 또한 본 연구의 결과는 미용실 서비스에 대한 소비자들의 인식과 각 미용실의 유형에 따른 소비자 만족을 예측하는데 중요한 서비스 품질 결정 요인들을 통해서 좀 더 나은 미용서비스를 정착시키는데 필요한 전략 을 수립할 수 있다는데 실질적 의미를 지닌다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.2
• /
• pp.329-338
• /
• 2018

This study was conducted to examine musculoskeletal disorder and analyze the effects of musculoskeletal pain control and self-efficacy on musculoskeletal disorders in dental hygienists. Material and Methods; 483 dental hygienists residing in Gwangju were collected by the convenience sampling method and the self-administered questionnaire survey was conducted. Frequency analysis, crosstab analysis, t-test, and multiple logistic regression analysis were used for analysis. Results: the prevalence of musculoskeletal pain among subjects was 83.9% for the prior year, with 29.8% of patients being afflicted by musculoskeletal disorders. The factors influencing musculoskeletal disorders were musculoskeletal pain resolution. For pain resolution, the odds ratio of musculoskeletal disorders of the group who answered treatment in a hospital, an Oriental medicine clinic, or a pharmacy was 0.22 (95% confidence interval, 0.14-0.34) compared with the group who answered sick leave or task change, suggesting a negative relationship. These findings indicate that people with musculoskeletal disorders were not treated in the hospital, Oriental medicine clinic, or pharmacy. Therefore, it is necessary to improve medical management (oriental medicine, intravenous injection or medication, heat therapy or cryotherapy, steroid treatment, counseling, endovascular treatment using spinal cord stimulation, physical therapy, stretching, rehabilitation, and manual therapy) and job environment and to make a good approach to the prevention of musculoskeletal disorders to control dental hygienists' musculoskeletal pain.

• Journal of Conservation Science
• /
• v.18 s.18
• /
• pp.19-32
• /
• 2006

The stone pagoda of the Bunhwangsa temple made by piling small brick-shaped stones. The major rock forming stone bricks are andesites with variable genesis. Rock properties of the pagoda roof stone suffer partly including multiple peel-offs, exfoliation, decomposition like onion peels, cracks forming round lines and falling off stone pieces. The stylobates and tabernacles in all the four directions the pagoda are mostly composed of granitic rocks. Those rock properties are heavily contaminated by lichens and mosses with the often marks of inorganic contamination by secondary hydrates that are dark black or yellowish brown. Within the four tabernacles and northern pagoda body situated to relatively high humidity. There are even light gray precipitate looking like stalactites between the northern and western rocks of the body Their major minerals are calcite, gypsum and clays. The stone lion standing in the southeast and northeast side are alkali granite, while that in the southwest and northwest lithic tuff. Total rock properties of the pagoda are 9,708 pieces, among the all properties, fractured blocks are 11.0%, fall out blocks are 6.7% and covered blocks by precipitates are 7.0%, respectively. The pagoda has highly deteriorated the functions of the rock properties due to physical, chemical and biological weathering, therefore, we suggest that this pagoda has need to do long term monitoring and synthetic conservation researches.