• Restorative Dentistry and Endodontics
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• 제40권4호
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• pp.328-331
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• 2015

Though p values give information on statistical significance, they are confounded with the sample size. Effect size can make up the weak point, by providing information on the actual effect which is independent of the sample size. Therefore, reporting the effect size as well as the p value is recommended.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7273-7284
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• 2015

본 연구는 메타분석을 통해 불안장애에 적용된 비약물적 중재요법의 효과크기를 알아보고 대상자 중재에 근거기반한 객관적 자료를 제공하기 위해 수행되었다. 이를 위해 국내 주요 DB를 이용하여 불안장애에 대하여 비약물적 중재를 제공한 2,690편의 논문 중 불안과 우울을 종속변수로 하여, 선정기준에 적합한 최종 23편의 논문을 대상으로 분석을 실시하였다. 검색어는 '불안장애(anxiety disorder)', 중재(treatment or intervention)'를 이용하여 2015년 5월까지 출판된 논문을 검색하였다. 분석은 랜덤 효과모형을 이용하였으며, 불안과 우울의 효과크기를 각각 산출하였다. 본 연구에서 비약물적 중재의 불안에 대한 효과크기는 Hedges's g=1.693, 우울에 대한 효과크기는 Hedge's g=1.571로 큰 효과크기를 보였다. 본 연구는 국내에서 시행되고 있는 불안장애에 적용한 비약물적 중재효과에 대한 연구결과를 체계적으로 종합하고, 그 효과크기를 객관적으로 제시하여 간호중재에 적용할 수 있는 근거를 마련하였다는데 그 의의가 있다.

• Journal of Magnetics
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• 제20권1호
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• pp.21-25
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• 2015

Fine Nd-Fe-B-type particles were prepared by ball milling of different types of Nd-Fe-B precursor materials, such as die-upset magnet, HDDR-treated material, and sintered magnets. Coercivity dependence on the grain and particle size of the powder was investigated. Coercivity of the milled particles was reduced as the particle size decreased, and the extent of coercivity loss was dependent upon the precursor material. Coercivity loss in the finely milled particles was attributed to the surface oxidation. The extent of coercivity loss in the fine particles was closely linked to grain size of the precursor materials. Coercivity loss was more profound for the fine particles with larger grain size. Contrary to the fine particles from the sintered magnets with larger grain size the fine particles (~10 um) from the die-upset magnet and HDDR-treated material with much finer grain size still retained high coercivity (> 10 kOe for die-upset magnet, > 4 kOe for HDDR-treated material).

• 한국의류산업학회지
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• 제17권2호
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• pp.278-286
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• 2015

Fashion industry has tried to adopt the virtual garment technology to reduce the time and effort spent on sample creation. For garment manufacturers to adopt the virtual garment technology as an alternative to sample creation, 3D avatars that meet the needs of each brand should be developed. Virtual garment softwares that are available in the market provide avatars with standardized body models and allow to modify the size by manually entering size specifications. This study proposed a methodology to develop size specifications for 3D avatars as well as brand-customized production sizes. For this, a man's fashion brand which is using virtual garment technology is selected. And the Size Korea database is used to develop size specification based on the customers' body shape. This study developed regression equations on body size specifications, which in turn proposed a regression model to proportionately change size specifications of 3D fitting-models. Based on the each body size calculated by the regression model, a standard model is created, and the skeleton-skin algorithm is applied to the regression model to obtain the results of size changes. Then, the 3D model sizes are tested for size changes as well as measured, which verifies that the regression model reflects body size changes.

• 한국염색가공학회지
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• 제27권4호
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• pp.245-260
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• 2015

The effect of salt milling process on the crystal size, morphology, and color characteristics of C.I. Pigment Red 57:1 was studied. The primitive morphology and color properties of the pigment after synthesis were studied in the former series work. The size and morphology of primary particles and the second aggregation features should be considered because they are very important to determine pigment quality. We compared the primary morphology of pigment particles before drying with the secondary aggregated morphology of pigment particles after drying and salt milling process. Morphological properties were investigated by particle size analysis, X-ray diffraction, and scanning electron microscopy and color measurement was carried out. Significant reduction in particle size as well as enhanced crystallite size after salt milling process was observed. This result might give a difference in color of the pigment, turning into brighter and more blue-toned red color. It was revealed that synthesis condition affect the morphology and color of the pigment even after milling. Increase in HCl concentration in the synthesis process enhanced crystal size and quality forming bluer-red pigments but an increase in $CaCl_2$ concentration resulted in more amorphous crystals forming darker-red pigments after salt milling.

• 펄프종이기술
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• 제47권4호
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• pp.76-80
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• 2015

In filler loaded paper, the size of the filler affects its strength, optical and surface properties. As the size of the filler increases, tensile strength and bulk usually increases, opacity decreases, and smoothness becomes worse. Pre-flocculation of GCC (grounded calcium carbonate) makes large diameter flocs at aqueous medium that consists of multiple GCC particles, but they collapse to 2-dimensional shape in dried paper and makes low bulk paper. The hybrid calcium carbonate (HCC) that was made by in-situ $CaCO_3$ formation between GCC in aqueous medium made high bulk paper without harming tensile strength, bulk, opacity, and smoothness. The GCC that has equivalent size as HCC failed to make high opacity and smoothness as much as HCC.

• 한국분무공학회지
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• 제20권3호
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• pp.175-180
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• 2015

A series of sprinkler discharging tests was conducted to measure the droplet size and its distribution of residential fire sprinkler heads. Droplet sizes in sprinkler spray were measured using a laser diffraction method for the flush, circular and pendent type sprinkler head. In this study, the $D_{v,50}$ of the flush type sprinkler heads were ranged between $530{\sim}1040{\mu}m$ and those of circular and pendent type were $988{\mu}m$ and $916{\mu}m$, respectively. The measured cumulative volume distributions were followed by a combination of the log-normal and Rosin-Rammler distribution which is widely used in the computational fire analysis and the parameters of distribution function were obtained from the best fit line through the measured data.

• 한국염색가공학회지
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• 제27권4호
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• pp.229-244
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• 2015

The effects of synthesis conditions on characteristics of the calcium-azo complex pigment, C.I. Pigment Red 57:1, were studied. It was mainly considered that the industrially required synthesis conditions for lowering electrical conductivity of the pigment solution keeping pigment quality such as particle size and color characteristics. Three parameters were chosen as control factors during the synthesis. The first was the amount of hydrochloric acid added to transform sodium nitrite into nitrous acid. The second was the amount of calcium chloride added to insolubilize the synthesized azo dye. The final factor was pH control during the coupling reaction. The electrical conductivity and pigment aggregate particle size were dependent on the amount of hydrochloric acid and calcium chloride. Higher HCl concentration gave brighter yellowish-red color because of smaller particle aggregate size and narrower size distribution. Amount of charged ions in the synthesis process might affect the "lake" formation resulting different particle aggregate size and color shade.

• 보건의료산업학회지
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• 제9권3호
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• pp.31-42
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• 2015

Objectives : The purpose of this study was to examine the factors that affect employee satisfaction according to hospital size, job group and career at hospitals. Methods : Data were collected from 4,307 employees working at 5 university hospitals. Statistics were done with the SPSS program version 21.0. Results : There were significant differences in employee satisfaction according to hospital size, job group and career. Additionally, there were positive correlations between each of the factors for employee satisfaction and overall employee satisfaction. Multiple regression analysis showed that overall employee satisfaction was affected by factors such as job, communication, personnel and leadership according to hospital size, job group and career. Conclusions : The results of this study suggest that by identifying the differences in satisfaction of employees who are working in different circumstances and providing resources to satisfy employee needs, hospital employers can promote the growth of the hospital by reducing employee turnover.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7564-7574
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• 2015

본 연구는 지난 15년간의' 사회복지사의 이직의도'와 관련된 논문을 바탕으로 이직의도 억제 변인들의 효과크기를 메타분석을 통해 검증하고, 메타회귀분석을 통해 출판연도에 따른 변화추이를 검증하므로 이직억제를 위한 정책방안과 후속 연구의 연구방향을 제시하고자 하였다. 연구결과 억제변인에 대한 전체효과크기는 중간효과크기로 나타났다. 변인군 별 하부 변인의 효과크기는 개인특성변인군이 급여수준, 연령과 결혼여부, 근무기간, 이직경험, 학력수준, 근무형태 순으로 나타났으며, 직무특성변인군은 직무만족, 근무환경, 직무중요성, 상사와 동료관계, 직무자율성 순으로 나타났다. 또한 조직특성변인군 효과크기는 조직몰입, 조직헌신, 승진기회, 보상만족, 조직 내 공정성, 참여적 의사결정 순으로 나타났다. 출판연도에 따른 변화추이는 2015년도에 가까울수록 억제변인들의 효과크기가 낮아지는 것으로 나타났다.