• Journal of the Korean Academy of Esthetic Dentistry
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• v.25 no.2
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• pp.68-78
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• 2016

Recently, digital technology has become increasingly prevalent in the dental clinic. Using a milling machine for clinic, it is possible to produce provisional restoration inside the clinic. This can promote large clinical cases such as full mouth rehabilitation with the help of a tabletop scanner, which is capable of semi-adjustable articulator equipment, and a powerful dental CAD software with excellent user convenience. In this case report, a full-mouth rehabilitation was done with digital technology to a 55 year-old female patient, who has lost vertical dimension through the attrition, and has got inclined occlusal plane with unplanned and repeated dental reconstruction. Through the design and milling of the provisional restoration in the clinic and the duplication of these provisionals by double scanning technique, a good functional and esthetic result could be achieved.

• Journal of Dental Rehabilitation and Applied Science
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• v.34 no.3
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• pp.208-217
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• 2018

The maxillary anterior teeth play an important role in esthetics. The esthetic of maxillary anterior teeth is closely related to tooth morphology and also harmony with gingiva. Precise diagnosis and treatment plan are essential to satisfy patient's demand, and sometimes surrounding soft tissue management is involved to achieve the goal. Gingivectomy can be considered as one method to make esthetic restoration possible. As well as esthetics, function has to be considered in maxillary anterior teeth restoration. Definitive cast of abutment and diagnostic cast waxed up labially were superimposed with model scanner, so can provide former comfortable occlusion. This case report demonstrates functional and esthetic improvements of two patients through gingivectomy and the data of superimposed image of casts.

• Journal of the Korean Society for Nondestructive Testing
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• v.32 no.1
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• pp.56-63
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• 2012

In this study, a field applicability of reboiler tube was evaluated by comparing ECT signal with IRIS signal about wall loss rate and remaining wall thickness using worked austenite STS 316L ASME standard calibration tube. In the case of wall-loss rate, as a result, tolerance about $20%{\times}4$ flat bottom hole and 10% O D groove(ECT), 80% defect and 10% O D groove(IRIS) occurred up to ${\pm}15%$. In the case of remaining wall thickness, ECT was satisfied with the both tolerance, but tolerance about 80% defect occurred up to ${\pm}15%$ in IRIS. Therefore, if the IRIS is performed for interpretation of non-relevant indication and measurement of wall-loss rate after ECT, reliability is supposed to be improved.

• Journal of the Korean Society of Clothing and Textiles
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• v.18 no.4
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• pp.515-523
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• 1994

This study was accomplished to investigate the mechanical properties and handle according to treatment processes and brushing condition. For this study, grey fabrics of blended ratio of polyester 65% : cotton 35% were bleached and dyed. These fabrics were then brushed 1, 3, 5 and 7 times. The mechanical properties were measured with a KES-F system and the mechanical data were then transformed into hand values by the conversion equation, that is, KN-201-MDY. The results obtained by the analysis are as follows; 1) The variation of mechanical properties was remarkable in the initial brushing of 1∼ 3 cycles for all of grey, bleached and dyed fabrics. The values of RT, 2HB, B, G, 2HGS, MMD and SMD were decreased and MIU, WC and T were increased with the increase of number of brushing . 2) LT, B, 2HB, G, 2HG, 2HGS, MMD, SMH and W of dyed fabrics which is coincident with the end use showed lower values than those of grey or bleached fabrics, but MIU, WC and T were higher 3) From the variation of hand value, stiffness of dyed fabric showed lower value than that of grey or bleached fabric. On the other hand, smoothness, soft feeling and total hand values of dyed fabric were higher. Especially, dyed fabric showed the highest total value at the 3 cycles of brushing condition.

• Journal of Periodontal and Implant Science
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• v.23 no.2
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• pp.352-357
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• 1993

The purpose of the present study was to evaluate and compare the periodontal conditions of distally extending cantilever bridges(CB) and removable patial dentures(RPD). 78 patients treated with removable partial dentures were divided into 2 groups; bilateral free-ending (type 1) and unilateral free-ending(type 2). 43 patients treated with distally extending cantilever bridges were divided into 4 groups according to position of missing molars and number of including abutment tooth (or teeth) (type 1-4). Prosthodontic status of the abutment teeth were assessed; overcontoured crown, overhanged margin, embrasure closure, and others. Their Periodonted status were assessed with Plaque Index Gingial Index(GI) Sulcus bleedy Index (SBI), Tooth mobility(TM) & Posher depth(PPD). 35.9% of RPD group and 38.1 of CB grouphad disconfort on mastication with prosthetics. 16.7% of RPD group and 6.1% of CB group showed on opposing sites. Overhanged margins were 58.3% for RPD group and 86.6% for GB group. 45.5% of RPD group and 72% of CB group had embrasure closure on the abutment teeth. 30.5% of GB group had oversized pontic. Gb group showed much higher clinical parameters than RPD groups, but statistically not significant. Type 2 of RPD group showed lower GI and SBI, but statistically not significant. Type 3 of CB group showed the highest GI and SBI and type 2 showed the highest tooth mobility, but there is no differences between the same type of groups. In conclusion, only minor differences in periodontal conditions were recorded in RPD and CB group.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.410-411
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• 2015

765kV 송전선로와 선하 건조물은 최하단 도체의 높이 28m를 적용하고 대지저항률은 $100{\Omega}m$, IEEE 변전소 설계지침인 Std-80에 따라 건조물에 접촉하는 사람의 인체저항은 $1000{\Omega}m$, 대지를 딛고 있는 사람의 한쪽 발 접지저항은 직경 8cm의 원판 접지저항을 적용한다. 이렇게 구성된 모델에서 선로중심에서 건조물까지 이격거리 변동에 따라 인체 유도전류를 측정하고자 한다. 본 연구에서는 전기안전 실증시험을 위해 765kV 가공송전선로 직하에 목조 및 샌드위치 판넬 2가지 시험용 가옥을 설치하였다. 전기설비기술기준에 의거하여 선하직하 이격거리가 28m일 때 발생할 수 있는 전자계 특성과 재질에 따른 전자계가 미치는 영향을 비교 분석하고 장기 유도장해 실측 데이터를 확보하고자 그림 1과 같이 구축 설계하였다. 이를 통해 송전선로에 의해 선로중심으로부터 구축된 모의가옥까지 이격거리에 따라 유도되는 전류를 측정하고 그 크기가 인체에 미치는 유도전류 한계치 초과 여부에 대해 검토함으로써 안전성 여부에 대해 측정 및 검토하고자 시험게획을 수립하였다. 또한 선로 고장 시 대지전위상승에 의한 선하 건조물 안정성 검토 및 낙뢰서지 유입에 의한 전기안전 시험 구성을 하였다.

• Journal of Nutrition and Health
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• v.40 no.sup
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• pp.22-28
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• 2007

최근 식생활의 서구화로 인해 기호식품의 사용량이 증가하고 설탕섭취량은 계속적인 증가를 보이고 있다. 특히, 아동들이 우리의 전통식생활에서 멀어지고 단 맛 위주의 스낵류나 과자 케일 등과 같은 기호식품의 사용으로 인한 설탕섭취량이 증가하고 있다. "식품수급표"상에 나타난 설탕공급량을 위주로 우리 국민의 설탕소비패턴과 국제간 비교를 통해 한국인들의 설탕섭취수준이 어느 정도인지를 파악하고 단맛에 대한 한국인의 기호도의 변화과정을 살펴보았다. "2001 국민건강영양조사"에서는 한국 성인 1일 1인당 약 60 g 정도의 설탕 섭취량을 보였다. 농림부의 "식품수급표"를 중심으로 살펴보면 2002년에 1인 1일당 설탕공급량이 57 g으로 나타나 미국인의 1일 설탕섭취량인 130 g 정도인 것에 비하면 아직도 적다고 볼 수 있다. 그러나 1962년에 4.8 g이었던 것을 생각하면 상당히 증가하였다. 식품수급표상에 나타난 국제 통계 비교치에서는 한국인의 1일 설탕공급량을 99g 으로 잡고 있어 실제로는 한국인들의 설탕섭취량이 상당한 수준으로 올라왔음을 짐작케 한다. ISO의 국제 비교에서는 1년 1인 소비량이 22.7kg으로 전 세계 국가 평균 소비량을 상회하고 있다. 아동의 가공식품 소비로 인한 설탕섭취량은 급속히 증가하였고, 현재 급속히 증가하고 있는 아동비만 현상과도 관련이 있다. 1995년에 행해진 초등학생들의 설탕섭취실태자료를 통해 볼 때 이미 10년 전에도 도시지역이 아닌 농촌 지역 아동의 설탕섭취량이 이미 60 g 이상을 넘어서고 있었고 급원식품에서 성인들이 주로 과일류 의존이 높았던 반면 아동들은 간식류에서의 설탕섭취가 매우 높았다. 따라서 연령별로 매우 자세한 간식 목록에 의거한 설탕섭취량 조사가 무엇보다도 필요하다. 현재 한국의 식품성분표에는 다양한 한국음식에 대한 설탕함량 Database가 없으므로 미국의 USDA Database를 기초로 한국 식품의 설탕 함량을 추론해야 하는 어려움이 있다. 따라서 다양한 한국음식의 설탕함유량에 대한 Database구축이 무엇보다도 필요하다고 보인다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.702-707
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• 2006

There have been certain extent of material inventory in construction site because of difficulties in ordering by small quantity, strategy of securing future requirements and prevention of delay. However, carrying these inventory entails a financial cost called inventory holding cost and decrease construction productivity, so proper inventory management in construction industry is important for construction efficiency and cost reduction. This study tries to find analytical method of inventory management. It includes ordering decision which decide how much to order and when to order. Setting these strategies including deciding safety inventory, input and ouput variability are able to controled.

• Applied Biological Chemistry
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• v.40 no.3
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• pp.225-231
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• 1997

Optimization theory was applied to a native and two imported soybeans. Failure stress and stress relaxation curve was measured with rheometer, and color was measured by colorimeter. The effects of each soybean upon the tofu texture were expressed through a non-linear canonical regression model and trace plot. Compared to the other imported soybeans, native soybean produced a higher strength in tofu texture, and showed the positive increase in viscoelastic properties such as instantaneous stress, equilibrium stress and relaxation time, whereas it had no effect on whiteness from reference blend, represented that native soy-bean showed the individual strength upon the selected rheological texture properties. Higher soaking ability in native soybean was selected as a new response for the optimization mixture process, and it contributed positively to the rheological properties of tofu. New soaking process control system during processing and desirability for the mathematical model should be applied for a better mixture design in varieties of soybeans.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.6
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• pp.107-115
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• 2002

A parametric study has been conducted to evaluate the effects of finite element modeling methods on the internal loads, sizing and the weight of the multi-spar aircraft wing structures. The wing is idealized into total 18finite element models and subjected to 4typical external load conditions. An automatic sizing algorithm based on MSC/NASTRAN and MSC/PATRAN is developed. The results show that the critical part affection the internal loads and weight of the structure is wing skin. Effect of modeling of the spar and rib on the structural behavior is not manifest. On the contrast to the general expectation, the models using the bending-resistant elements show the heavier weight than ones by the elements without bending stiffness. From this results, designers of multi-spar wing are recommended to construct the finite element model considering the bending stiffness, or to check the characteristics of the structure before modeling.