• The Journal of Advanced Prosthodontics
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• 제9권4호
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• pp.315-320
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• 2017

PURPOSE. The aim of this investigation was to analyze the dimensions of clinical crowns and to classify the crown and the gingival type in the anterior teeth in Korean young adults. MATERIALS AND METHODS. Casts were obtained from 50 subjects ranging in age from 24 to 32. Measurements of length and width were made on the casts using a pair of digital calipers on the entire dentition. Crown thickness and papilla height were also measured and MDW/CL (mesiodistal width to clinical length) and CW/CL (cervical width to clinical length) ratios of the maxillary anterior teeth were calculated. The K-clustering method was used for CW/CL to classify the anterior tooth shape into three groups (tapered, ovoid, and square), and one-way analysis of variance and Duncan's post-hoc comparison were used to evaluate statistical significance between the groups. Pearson's correlation analysis was performed between tooth shape and papillary height (PH) to demonstrate the correlation between tooth shape and gingival morphological characteristics. RESULTS. The average length of the maxillary central incisors was 9.89 mm; the mesio-distal width was 8.54 mm; and the ratio of width/length was 0.86 in Korean young adults. The average bucco-palatal thickness of the central incisor was 3.14 mm at the incisal 1/3 aspect. Ovoid type was the most common tooth shape (48%), followed by square type (29%) and taper type (23%) in the central incisors of Korean young adults. Tooth shape and gingival type were correlated with each other. CONCLUSION. New reference data were established for tooth size in Korean young adults and the data show several patterns of tooth shape and gingival type. Clinicians should diagnose and treat based on these characteristics for better results in the Korean population.

• 한국산학기술학회논문지
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• 제20권12호
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• pp.708-714
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• 2019

본 연구는 치과위생사를 대상으로 감성리더십이 직무만족에 미치는 영향을 파악함으로써, 치과위생사가 갖추어야 할 소양 중의 하나인 감성리더십을 통해 직무만족도를 향상시키는 방안을 도출하고자 연구하였다. 연구기간은 2018년 4월 16일부터 4월 28일까지 전라북도에 소재한 치과병·의원에 근무하고 있는 치과위생사 237명을 대상으로 SPSS 12.0 프로그램을 사용하여 빈도, 기술통계, t-test, ANOVA, 다중회귀분석을 실시하였다. 연구대상자의 감성리더십 각 요인 중 관계관리능력은 3.15로 가장 낮았고, 직무만족은 평균 3.43 였고, 동료와의 관계는 4.15로 가장 높아 직장 내 동료와의 관계가 잘 이루어지고 있었고, 업무처리방침과 급여수준은 2.49~2.98로 낮았다. 결혼상태, 자기인식능력, 자기관리능력, 관계관리능력은 직무만족에 영향을 미쳤으며, 다중회귀모형의 설명력은 26.5%이며 모형의 타당성은 통계적으로 유의하였다(p<0.05). 이상의 연구결과를 토대로 치과위생사의 직무만족에 감성리더십의 자기인식능력, 자기관리능력, 관계관리능력이 상호 관련성이 깊은 것으로 나타났다. 따라서, 치과위생사의 감성리더십을 강화시켜 타인의 감정을 공감하고 잘 이해하고 관리하는 능력을 향상시킬 수 있는 감성리더십 프로그램 개발과 교육 및 훈련이 이루어지도록 제도적 뒷받침이 이루어져야 하겠다.

• 한국치위생학회지
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• 제9권3호
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• pp.507-521
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• 2009

This study purposed to analyze dental hygienists' job satisfaction according to their clinical career as an effort to enhance their job satisfaction and quality and to provide basic materials for dental hygienists' effective job performance. For this purpose, we surveyed 120 dental hygienists working at dental hospitals and clinics in Busan during the period from the $1^{st}$ February to $31^{st}$ March 2009 by using a self administered questionnaire. Job satisfaction was measured using a 5 point Likert scale ranging from 'Absolutely yes' (5 points) to 'Yes' (4), 'So so' (3), 'No' (2), and 'Not at all' (1), and a high score indicates high degree of satisfaction. When it testd the reliability of the job satisfaction scale was tested, Cronbach's Alpha (${\alpha}$) was 0.85 which indicates the instrument is sufficiently reliable. Data collected were analyzed with SPSS. We performed frequency analysis in order to examine the subjects' demographical characteristics, and Chi square and one way ANOVA to examine their perception of their job, job satisfaction, and their aptitude and status as a dental hygienists' according to clinical career. The results of this study were as follows. 1. The longer clinical career the dental hygienists had, the more they thought that they had aptitude as a dental hygienist (p<0.05). 2. The dental hygienists' turnover intention was different according to clinical career (p<0.01). 3. The longer clinical career the dental hygienists had, the more satisfied they were when they were working at a dental hospital or clinic equipped with convenience facilities (change room, lounge, etc.) (p<0.01). 4. The longer clinical career the dental hygienists had, the more power to make decisions they had and the more acknowledgement and trust they received from dentists (p<0.01). 5. Satisfaction with duty coordination was low in general, but it grew higher with increase in clinical career (p<0.01). 6. The longer clinical career the dental hygienists had, the more satisfied they were with patients' appreciation of their treatment (p<0.01). In addition, their time and opportunities to discuss with dentists were different according to clinical career, and their satisfaction with the items was higher when their clinical career was long (p<0.01). 7. As to their perception of dental hygienists' potential for development, they generally believed that they had potential for future growth with the expansion of their work scope (M=3.73). The longer clinical career the dental hygienists had, the more satisfied the more power to make decisions they had and the more acknowledgement and trust they received from dentists and their time and opportunities to discuss with dentists when they were working at a dental hospital or clinic equipped with convenience facilities (change room, lounge, etc.). The longer clinical career the dental hygienists had, the more they thought that they had aptitude as a dental hygienist. In conclusion, the longer clinical dental hygienists' Career had, satisfaction was able to take a highness to a dental hygienist occupation.

• 디자인학연구
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• 제14권2호
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• pp.163-174
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• 2001

월리엄 모리스(1834-1896)는 19세기 영국의 지식인중에서도 가장 다재다능한 사람이었다. 그의 사후 백년이 지났지만, 화가 디자이너, 제조업자, 상회경영자, 시인, 작가, 출판인, 인쇄업자, 수집가, 교사, 자원보호론자, 사회운동가, 환경보호론자 둥으로 활약했던 그의 삶과 일은 아직도 전세계에 영향을 미치고 있다. 모리스는 오늘날 그의 매력적인 컬러풀한 패턴으로 가장 잘 알려져 있다. 1861년 모리스는 모리스 마샬 포크너상회(1875년부터 모리스상회)를 설립하여, 스테인드 글라스를 비롯한 타피스트리, 카펫, 프린트물, 직물 둥을 생산해 냈는데, 그러한 디자인은 영국 디자인의 향방에 큰 지침을 주었다. 모리스의 초기의 텍스타일 디자인은 비전문가로서 자신의 필요에 의한 자수작업이었으나, 곧 상업적인 기초를 갖고 텍스타일 제품을 생산해내기 시작한다. 모리스는 제작을 적절히 콘트롤하기 위해서 다양한 텍스타일의 테크닉을 배웠는데, 처음에는 염색, 블록 프린팅, 수직 자카드 둥을 배웠고, 나중에는 카펫과 타피스트리까지 배웠다. 이러한 비상한 제작에 대한 직접적인 참여는, 모리스와 당시의 다른 디자이너들과의 차이점이었고, 그의 성공에도 크게 기석하게 된다. 모리스의 텍스타일 디자인은 자수, 염색, 직물, 카펫 타피스트리 둥의 작품으로 상업적으로 생산되어 널리 상찬을 받았고, 오늘날에도 복제되고 있다. 이것은 그의 디자인이 시대를 초월한 질과 테크닉으로 존중되고 있기 때문이며, 또한, 그의 패턴의 세부에서도 볼 수 있는 자연에 대한 사랑의 중요성 때문이다.

• 한국화재소방학회논문지
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• 제27권3호
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• pp.30-37
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• 2013

본 연구는 가연성탱크 화재발생시 하나의 포 비례혼합기에서 분기헤더를 거쳐 다수의 소화지역 분기방식 포 소화설비의 분기헤더에서 저장탱크 하단부 입상관 까지의 포수용액 배관단면적 감소에 따른 통과유량 감소로 혼합비가 허용범위를 벗어날 때 적정농도의 포수용액 방출에 효과적인 방법을 확보하는데 궁극적인 목적이 있다. 이를 위해 기설치 포 소화설비의 유량변동에 따른 혼합비 변동원인 분석 및 일정혼합비 보상방법을 찾아보고, 포 비례혼합기 벤츄리 폼챔버 오리피스 및 미터링 오리피스 교체실험을 통해 원액흡입배관 단면적을 확장시킬 수 있는 미터링 오리피스 교체실험이 포 소화설비 혼합비 개선에 가장 효과적인 방안임을 입증하였다.

• 펄프종이기술
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• 제40권5호
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• pp.60-69
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• 2008

The principal reasons for applying a pigment coating to paper are to improve appearance and printability. The pigment coating provides a surface that is more uniform and more receptive to printing ink than are the uncoated fibers and, in turn, both facilitates the printing process and enhances the graphic reproduction. The improvement in print quality is readily apparent, especially in image areas or when multiple colors are involved. Although pigment coating of paper is to improve the printability, coated paper is not completely free from printing defects. Actually there are a number printing defects that are observed only with the coated papers. Among the printing defects that are commonly observed for coated papers, print mottle during multi-color offset printing is one of the most concerned defects, and it appears not only on solid tone area but also half dot print area. There are four main causes of print mottle ranging from printing inks, dampening solution, paper, and printing press or its operation. These indicates that almost every factors associated with lithographic printing can cause print mottle. Among these variation of paper quality influences most significantly on print mottle problems in multicolor offset printing, and this indicates that paper is most often to be blamed for its product deficiency as far as print mottle problems are concerned. Furthermore, most of the print mottle problems associated with paper is observed when coated papers are printed. Uncoated papers rarely show mottling problems. This indicates that print mottle is the most serious quality problems of coated paper products. Overcoming the print mottle is becoming more difficult because the operating speeds of coating and printing machines are increasing, coating weights are decreasing, and the demands on high-quality printing are increasing. Print mottle in offset printing is caused by (a) nonuniform back trap of ink caused by a nonuniform rate of ink drying, referred as "back trap mottle, and (b) nonuniform absorption of the dampening solution. Furthermore, both forms of print mottle have some relationship to the structure of the coated layer. The surest way of eliminating ink mottling is to eliminate unevenness in the base paper. Coating solutions, often easier to put into practice, should, however, be considered. In this paper the principal factors influencing print mottle of coated papers will be discussed. Especially the importance of base paper roughness, binder migration, even consolidation of coating layers, control of the drying rate, types of binders, etc. will be described.

• 대한치과보철학회지
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• 제45권6호
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• pp.735-742
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• 2007

Statement of problem. Although a number of previous investigations have been carried out on the polymerization shrinkage-strain kinetics of provisional crown and fixed partial denture (FPD) materials, the effect of the changes of liquid monomer to powder ratio on its polymerization shrinkage-strain kinetics has not been reported. Purpose. The purpose of this study was to investigate the influence of liquid monomer to powder ratio of polymer-based provisional crown and FPD materials on the polymerization shrinkage-strain kinetics. Material and methods. Chemically activated acrylic provisional materials (Alike, Jet, Snap) were investigated. Each material was mixed with different liquid monomer to powder ratios by volume (1.0:3.0, 1.0:2.5, 1.0:2.0, 1.0:1.5, 1.0:1.0). Time dependent polymerization shrinkage- strain kinetics of all materials was measured by the bonded-disk method as a function of time at $23^{\circ}C$. Five recordings were taken for each ratio. The results were statistically analyzed using one-way ANOVA and the multiple comparison Scheffe test at the significance level of 0.05. Trends were also examined by linear regression. Results. At 5 minutes after mixing, the polymerization shrinkage-strains of all materials ranged from only 0.01% to 0.49%. At 10 minutes, the shrinkage-strain of Alike was the highest, 3.45% (liquid monomer to powder ratio=1.0:3.0). Jet and Snap were 2.69% (1.0:2.0) and 1.58% (1.0:3.0), respectively (P>0.05). Most shrinkage (94.3%-96.5%) occurred at 30 minutes after mixing for liquid monomer to powder ratio, ranging from 1.0:3.0 to 1.0:1.0. The highest polymerization shrinkage-strain values were observed for the liquid monomer to powder ratio of 1.0:3.0. At 120 minutes after mixing, the shrinkage-strain values were 4.67%, 4.18%, and 3.07% for Jet, Alike, and Snap, respectively. As the liquid monomer to powder ratio increased, the shrinkage-strain values tend to be decreased linearly (r=-0.769 for Alike, -0.717 for Jet, -0.435 for Snap, $r^2=0.592$ for Alike, 0.515 for Jet, 0.189 for Snap; P<0.05). Conclusion. The increase of the liquid monomer to powder ratio from 1.0:3.0 to 1.0:1.0 had a significant effect on the shrinkage-strain kinetics of polymer-based crown and FPD materials investigated. This increased the working time and decreased the shrinkage-strain during polymerization.

• 대한소아치과학회지
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• 제24권2호
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• pp.352-360
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• 1997

구순 구개열 신생아는 출생시부터 수유의 어려움을 비롯하여 중이염, 언어장애, 부정교합, 부적절한 악안면 성장과 이로 인한 정신적 손상등에 직면하게 된다. 이런 복합적인 문제를 갖고 있는 신생아의 전반적인 치료를 위해서는 여러 관련분야 전문가들의 포괄적인 관리가 필요하다. 특히 수유의 어려움은 유아의 영양 상태를 좌우할 수 있는 중요한 문제이므로 가장 먼저 관리하여야 할 부분이다. Obturator의 사용은 수유보조의 역할 뿐만 아니라 구강과 비강을 구분하여 중이염의 발생빈도를 감소시키고, 구개판의 성장을 촉진시키며, 정상적인 구강 안면조직의 발달을 유도할 수 있다. 소아치과의사는 구순 구개열 신생아의 정상적인 성장, 발육을 위해 출생 직후 부모에게 적절한 수유방법의 조언과 함께 obturator 를 장착해 주고, 다른 team과 긴밀한 협진을 통해 유치열기, 혼합치열기까지 지속적으로 치과적 관리를 제공하여야 한다.

• 비교교육연구
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• 제28권3호
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• pp.265-289
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• 2018

본 논문은 20세기에 '상호문화적'이라는 용어를 사용하며 출현한 미국의 상호문화교육, 상호문화의사소통, 캐나다의 상호문화주의, 유럽의 상호문화교육, 상호문화철학을 그 출현 시기, 장소, 배경, 주안점, 한계 등을 기준으로 비교해보면서 이것들이 상호 영향이나 합의 하에 출현한 것인지 아니면 독자적으로 출현한 것인지를 밝혀보고자 하였다. 우리는 이 다섯 가지의 '상호문화 담론들'을 비교, 분석해 본 결과, 이 담론들이 비록 '상호문화적'이라는 용어를 모두 사용했지만 상호 영향이나 합의는 거의 없이 독자적으로 발전해 왔음을 알 수 있었다. 우리는 이것을, 20세기 국제화, 세계화에 의해서 만들어진 지구촌에서 점점 부각되고 있는 문화적 차이들을 가능한 긍정적으로 접근해 보고자 하는 인류의 공통적인 노력의 소산이라고 해석하였다. 우리는 이런 상호문화 담론이 한국 다문화 사회에도 널리 퍼지길 기대한다.

• Asian-Australasian Journal of Animal Sciences
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• 제31권12호
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• pp.1881-1889
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• 2018

Objective: In dryland areas of China, alfalfa hay (AH) is a possible substitute for concentrate feed for beef cattle. To evaluate the potential benefits of this substitution, we studied the effect of the ratio of AH intake to total dry matter (DM) intake on average daily body-weight gain (ADG), dietary energy utilization status, and economic benefit in Gansu province. Methods: In each of two feeding trials in 2016 (trial 1 [T1], July 3 to 17; trial 2 [T2], August 15 to September 23), crossbred male Simmental calves were allocated to low AH (LA), medium AH (MA), and high AH (HA) feeding groups (n = 4 per group). The target ADG was set as 1 kg for both trials. In a one-way-layout design based on conventional feeding practices in the province, calves received diets containing the different AH amounts, with a constant ratio of corn stover:total DM and decreasing rations of concentrate feed proportional to the increase in AH. Calves in T1 received AH at 15% (T1-LA), 23% (T1-MA), or 31% (T1-HA) of their dietary DM allowances; those in T2 received 9% (T2-LA), 24% (T2-MA), or 34% (T2-HA) AH. Results: Among the T1 groups, both ADG and economic benefit were highest in T1-LA; whereas in T2, they were higher in the T2-LA and T2-MA groups than in T2-HA. Energy digestibility did not significantly differ among the groups in either trial. The dietary AH inclusion ratios of 14% in the warm season and 8% to 21% in the cool season appeared to yield optimal ADG, metabolizable energy intake, and economic benefit. Conclusion: Low-level inclusion of AH, ranging from 8% to 21%, is a practical approach for beef cattle feeding. This modified feeding regimen likely will promote increased growth performance during the fattening stage of beef steers in dryland areas of Gansu province, China.