• Archives of Plastic Surgery
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• 제49권4호
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• pp.510-516
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• 2022

Background Surgical correction of bilateral cleft lip deformities remains one of the most challenging areas in facial plastic surgery. Many surgical techniques and conservative devices have been offered for the early management of bilateral cleft lip in infants. The purpose of this study was to evaluate the effect of lip adhesion on the lip and nose of patients with bilateral cleft lip. Methods A retrospective review of 13 patients with bilateral cleft lip was performed and compared with age-matched noncleft children. Patients underwent lip adhesion at a mean age of 2.8 months, and cheiloplasty at 6.6 months of age using a modification the Mulliken method. Secondary rhinoplasty was performed at the age of 6 in 13 patients. The surgical results were analyzed using photographic records obtained at the age of 1 and 7 years. Twelve length measurements and one angle measurement were obtained. Results All measurements were not statistically different from those of the noncleft age-matched control group at the age of 1. At 7 years of age, upper lip height and vermilion mucosal height were shorter (p < 0.05) than in the control group. Nasal tip protrusion and the nasolabial angle were greater (p < 0.05) than in the control group. Conclusion Lip adhesion followed by secondary rhinoplasty resulted in an acceptable lip and nasal appearance. Although nasoalveolar molding is now widely used, lip adhesion can be an appropriate alternative if an orthodontist is not available due to geographical or economic constraints.

• 한국지반공학회논문집
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• 제26권4호
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• pp.37-45
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• 2010

기후변화로 인해 물의 증발량이 많은 지역의 지반에서는 자연적인 소금의 고결화 현상이 발생한다. 이러한 소금의 고결화 분포는 모래지반에서 모세관력에 영향을 받는다. 이 연구의 목적은 콘 관입시험, 전기전도율 측정, 사진 이미지 촬영, 비파괴 이미지 분석 그리고 탄성파에 의한 프로세스 모니터링을 이용하여 소금의 고결화 현상에 대한 모세관력의 효과를 관찰하는 것이다. 실험은 입상재료를 모형화한 글라스비즈를 소금물에 포화시킨 후, 오븐에 넣어 시료를 건조시킴으로써 고결화를 발생시켰다. 실험결과, 고결된 소금의 농도는 시료입경이 작은 경우 최상부에서 높았고, 시료입경이 큰 경우 중간 또는 하부에서 높았다. 고결된 시료에서 높은 소금농도의 위치는 해석적 방법으로 산정된 모세관 높이와 유사하였다. 본 연구에서 수행한 5가지 실험은 모세관력이 소금이 고결된 흙과 같은 입상재료의 거동에 중요한 영향을 끼치는 것을 보여준다.

• 문화기술의 융합
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• 제6권1호
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• pp.63-68
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• 2020

최근 급격한 미디어의 변화에 따라 이에 부합하는 리터러시 교육의 필요성이 증가하고 있다. 하지만 증가하는 필요성에 비해 리터러시의 효율성에 대한 충분한 연구가 이뤄지지 않았던 것이 사실이다. 예를 들면 통합적 미디어 리터러시가 청소년 학습에 미치는 효과에 대한 연구와 같은 실증적 접근 등을 들 수 있겠다. 이에 본 논문은 기존 영상교육과는 차별화되는 멀티미디어 교육을 연구대상으로 삼고 청소년들에게 텍스트와 비디오와 사운드 등을 융합한 교육에 대한 결과를 학습 효과적 측면에서 연구했다. 멀티미디어 교육이 과연 청소년들의 학습에 긍정적 영향을 미치는 지에 대한 학문적 탐구다. 연구방법으로 양적 조사와 질적 조사를 병행한 결과, 멀티미디어 교육은 학습능력 향상에 유의미하다는 결론을 얻었으며 이를 바탕으로 멀티미디어를 활용한 교육으로 언어 교육과 같은 외연 확대와 동시에 실습 위주의 학습자 참여 교육을 제시했다. 이와 같은 여러 가지 교육정책에 대한 제언은 멀티미디어 교육이 단지 기존교육의 보조수단이 아니라 전인적 인격을 달성하는 교육의 핵심으로서 모든 학습활동의 중심으로 자리할 수 있다는 자신감으로 확산될 것이다.

• 디지털융복합연구
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• 제17권3호
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• pp.413-425
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• 2019

본 연구자는 시선 이동에 관한 연구를 진행 하였다. 시선이동의 기초적 변수는 디테일이다. 연구 결과 디테일의 변수는 컬러, 농도, 대비 등 다른 요인보다 시선 유입에 더 중요하게 작동하였다. 또한 사진의 피사체의 힘이 중심의 힘을 압도했다. 주 피사체와 배경이 되는 톤의 농도의 차이가 강하면 시각적인 중심이 주 피사체에 좀 더 유입된다. 주 피사체와 배경의 톤의 농도의 차이가 약하면 시선이 중심부와 주변부로 다양하게 퍼져 나가게 된다. 주요 요인은 노출의 차이로 노출의 차이가 심한 배경의 톤에는 시선이 거의 도달 하지 않는다. 피사체 중 사람은 주목 요인이 매우 높게 관찰되었다. 사람의 얼굴이 등장하는 사진은 다른 요인 보다, 비교적 주목도가 얼굴에 집중되는 경향이 있다. 사람이 들어간 사진에 관한 관심과 기억 효과는 높았다. 성적인 것, 위험한 것은 다른 요인보다 강하게 시선을 이동시키는 요인이 되는 것으로 관찰 되었다. 또한, 시선의 이동은 피사체의 형태, 위치, 밝기, 크기, 컬러, 패턴이 일정한 영향을 미치고 있다. 즉 피사체의 종류 및 내용이 시선 이동에 가장 주 요인으로 작동한다고 연구하였다. 또한 디테일이 다음변수로 중요한 요인이 된다. 그 외의 농도, 컬러, 위치, 크기 요인은 차선적 요인으로 관찰 연구하였다. 이는 광고사진에서 시선을 고정하거나 시선의 유도를 위해서는 피사체의 내용과, 디테일, 해상도 포커스 부분이 매우 중요하다는 시사점을 가진다.

• Journal of Acupuncture Research
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• 제37권4호
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• pp.203-208
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• 2020

This literature review was designed to investigate the effects of the microneedle therapy system (MTS) on alopecia in experimental, and clinical studies. The MTS is acupuncture needling therapy delivered by a roller. A literature review of studies published before May 2020 was conducted using 9 online databases, and a total of 13 studies (4 in vivo studies and 9 clinical trials) were included. Most studies showed that the MTS was effective when used in combination with other treatments. In vivo studies reported an increased level of hair growth factors following treatment. Typically, 1.5 mm needles were used in the MTS treatment and photographic evaluation (by either camera or microscope) was reported in most studies. Oriental medicine research included 2 in vivo studies, which reported positive effects when combined with the MTS. There were no reported severe side effects. the MTS might be safe and has a drug delivery effect. Further studies need to be conducted regarding the frequency and needle length depending on the type of alopecia using Oriental and Western medicine.

• Restorative Dentistry and Endodontics
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• 제22권1호
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• pp.428-446
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• 1997

Restorative procedures can lead to weakening tooth due to reduction and alteration of tooth structure. It is essential to prevent fractures to conserve tooth. The resistance to fracture of the restored tooth may be influenced by many factors, among these are the cavity dimension and the physical properties of the restorative material. The placement of direct composite resin restorations has generally been found to have a strengthening effect on the prepared teeth. It is the purpose of this investigation to study the relationship between the cavity isthmus and the fracture resistance of a tooth in composite resin restorations. In this study, MO cavity was prepared on maxillary first premolar. Three dimensional finite element models were made by serial photographic method and isthmus(1/4, 1/3, 1/2 of intercuspal distance) were varied. Two types of model(B and R model) were developed. B model was assumed perfect bonding between the restoration and cavity wall and R model was left unfilled. A load of 500N was applied vertically at the first node from the lingual slope of the buccal cusp tip. This study analysed the displacement, 1 and 2 direction normal stress and strain with FEM software ABAQUS Version 5.2 and hardware IRIS 4D/310 VGX Work-station. The results were as follows : 1. Displacement of buccal cusp in R model occurred and increased as widening of the cavity, and displacement in B model was little and not influenced by cavity width. 2. There was a significant decrease of stress resulting in increase of fracture resistance in B model when compared with R model. 3. With the increase of the isthmus width, B model showed no change in the stress and strain. In R model, the stress and strain increased both in the area of buccal-pulpal line angle and the buccal side of marginal ridge, therefore the possibility of crack increased. 4. The stress and strain were distributed evenly on the tooth in B model, but in R model, were concentrated on the buccal side of the distal marginal ridge and buccal-pulpal line angle, therefore the possibility of fracture increased.

• Restorative Dentistry and Endodontics
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• 제20권2호
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• pp.627-643
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• 1995

The resistance to fracture of the restored tooth may be influenced by many factors, among these are the cavity dimension and the physical properties of the restorative material. The placement of direct composite resin restorations has generally been found to have a strengthening effect on the prepared teeth. It is the purpose of this investigation to study the relationship between the cavity isthmus and the fracture resistance of a tooth in composite resin restorations. In this study, MO cavity was prepared on the maxillary left first molar and then filled with composite resin. Three dimentional model with 3049 nodes and 2450 8-node blick elements was made by the serial photographic method and isthmus (1/4, 1/3, 1/2 and 2/3 of intercusplal distance between mesiobuccal cusp tip and mesiolingual cusp tip) was varied. Two types of model(B and R model) were developed. B model was assumed perfect bonding between the restoration and cavity wall and R model was left unfilled. A load of 1500N was applied vertically on the node from the lingual slope of the mesiobuccal cusp. The results were as follows : 1. There was a significant decrease of stress resulting in increase of fracture resistance in B model when compared with R model. 2. When it comes to stress distribution, the stress was concentrated in the facio-gingival line angle and the buccal side of the distal margin of the cavity in both Band R model. 3. With the increase of the isthmus width, the stress decreased in the area of the facio-gingival line angle, and increased in the area of facio-gingival line angle as well as the buccal side of the distal margin of the cavity in B model. In R model, the stress increased both in the area of facio-gingival line angle and the buccal side of the distal margin of the cavity, therefore the possibility of crack increased. 4. As the width of cavity increased, in B model, the direction of crack moved from horizontal to vertical on the facio-gingival line angle and the facio-pulpal line angle. In R model, the direction of the crack was horizontal on the facio-gingival line angle and moved from horizontal to the $45^{\circ}$ direction on the facio-pulpal line angle.