• 한국지구과학회:학술대회논문집
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• 2006.02a
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• pp.239-244
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• 2006

충청북도 영동 지역에 분포하는 영동층군은 옥천변성대에 있는 소규모 퇴적분지중의 하나이다. 영동층군의 지질과 고생물에 관한 연구는 옥천변성대의 조구조운동과 관련한 퇴적분지 발달 규명과 아울러 경상분지와의 상호대비가 가능케 함으로써 이 시기의 한반도의 지질을 이해하는데 있어 매우 중요한 정보를 제공해 줄 수 있다(김규봉 등, 1986). 영동층군의 층서고생물학적 연구는 김규봉 등(1986), 전희영 등(1993), 최성자 등(1995)등의 연구가 있다. Shimamura (1927)는 영동층군에서 케이로레피드과(Cherolepidiaceae)에 속하는 식물화석의 산출을 처음 보고하였다. 이후 전희영 등(1993), 최성자 등(1995)이 영동층군에서 케이로레피드과에 속하는 식물화석을 다시 보고함으로써 영동층군에서 식물화석이 많이 산출될 가능성이 확인되었다. 본 연구에서는 식물화석의 연구에 중점을 두고 야외지질조사를 통하여 영동층군의 기존 화석산지와 새로운 화석산지로부터 많은 식물 화석을 채집하였다. 식물 화석은 모두 인상화석으로 보존되었으며 세일층의 층리면에 평행하게 밀집된 상태로 나타나지만 대부분 파편상으로 나타난다. 식물화석은 고환경이나 고생태에 대한 중요한 단서를 제공하고 과거의 기후를 알려주는 중요한 지시자로 사용되고 있다. 특히 케이로레피드과의 식물은 백악기의 대표적인 고기후의 지시자로서 잘 알려져 있다. 케이로레피드과의 식물은 분류상 구과류에 속하며 백악기에 걸쳐 세계적인 분포를 보이고 있는 화석이다. 본 연구는 영동층군에서 산출된 구과류 화석을 대상으로 고생물학적 연구를 수행하여 산출화석의 특징을 기재하고 체계적으로 분류함으로써 산출화석의 고식물학적 의미를 밝히고자 하였다. 또한 산출 화석의 특징과 지질학적 특징을 통해 중생대 백악기 영동지역의 고기후를 해석함으로써 고기후적 및 고생태학적 의미를 연구해 보고자 하였다.에서는 시스템 등급에 영향을 준다. 향후에는 더욱 더 다양한 상호의존 모델들이 정량화될 필요성이 있다고 본다. 진행하였다. 줄여서 보다 더 정확하고, 지능적인 규칙구성요소 추출 방법론을 제시하고 구현하여 지식관리자의 규칙습득에 대한 부담을 줄여 주고자 한다. 도움을 받을 수 있게 되었다.을 거치도록 되어있다. 교통주제도는 국가의 교통정책결정과 관련분야의 기초자료로서 다양하게 활용되고 있으며, 특히 ITS 노드/링크 기본지도로 활용되는 등 교통 분야의 중요한 지리정보로서 구축되고 있다..20{\pm}0.37L$, 72시간에 $1.33{\pm}0.33L$로 유의한 차이를 보였으므로(F=6.153, P=0.004), 술 후 폐환기능 회복에 효과가 있다. 4) 실험군과 대조군의 수술 후 노력성 폐활량은 수술 후 72시간에서 실험군이 $1.90{\pm}0.61L$, 대조군이 $1.51{\pm}0.38L$로 유의한 차이를 보였다(t=2.620, P=0.013). 5) 실험군과 대조군의 수술 후 일초 노력성 호기량은 수술 후 24시간에서 $1.33{\pm}0.56L,\;1.00{\ge}0.28L$로 유의한 차이를 보였고(t=2.530, P=0.017), 술 후 72시간에서 $1.72{\pm}0.65L,\;1.33{\pm}0.3L$로 유의한 차이를 보였다(t=2.540, P=0.016). 6) 대상자의 술 후 폐환기능에 영향을 미치는 요인은 성별로 나타났다. 이에 따른 폐환기능의 차이를 보면, 실험군의 술 후 노력성 폐활량이 48시간에 남자($1.78{\pm}0.61L$)가 여자($1.27{\pm}0.45L$)보다 더 높게 나타났으며 (t=2.170, P=0.042), 72시간에도 역시 남자($2.1

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.140-144
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• 2021

We humans try to pursue a better living environment along with the development of modern civilization. In particular, it is a reality that a lot of efforts are being made to improve food, clothing, and shelter. Among them, the concept of housing serves as a major function to improve the quality of life. However, the government's excessive tax rate regulation policy surrounding the sale of such houses is actually inducing annual or monthly rent expenses. Furthermore, it is a reality that even home sales are not being handled smoothly. In general, the cost of owning a house (apartment, etc.) can be divided into acquisition and possession. In addition, a lot of taxes are borne by long-term housing. Subsequently, due to the increase in the transfer tax rate due to the sale of houses, the disposal of property rights is not free. This serves as a limiting factor for market principles. If the tax rate for the transfer of multi-homed people is raised, it can cause a phenomenon that encourages yearly or monthly rent. This is a part where it seems necessary to reduce the transfer tax rate according to the multi-year retention period. If you hold it for 20 years after acquisition, you have paid a lot of taxes and returned your profits. For that reason, you should not impose a transfer tax for trading. The application of the tax-free principle for houses held for more than 20 years will respond to market principles in the future and will function effectively in annual or monthly rent policies.

• Journal of Dental Rehabilitation and Applied Science
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• v.37 no.4
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• pp.281-293
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• 2021

Patients who went through maxillectomy can have severely impaired swallowing, mastication, and pronunciation functions because of palatal defects. Leakage occurs through the nasal cavity while eating, chewing becomes difficult due to the loss of teeth and alveolar ridges, and oral and nasal passages are not separated, leading to hyper-nasal sound, and significantly reducing the quality of life. To prosthetically reconstruct the defect, the weight of the obturator should be reduced as much as possible to minimize dropout because of gravity, and the bulb of the obturator should be properly extended into the defect to get additional retention and stability. In this case of a partially edentulous patient who underwent additional maxillary resection because of tumor recurrence, a metal framework was designed by applying the basic design principles of removable partial dentures. An obturator with improved retention, stability, and support was fabricated through functional impressions. The patient was satisfied with the improved facial expression, mastication, swallowing, and pronunciation, and showed stable occlusion and oral hygiene management during the follow-up period.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.24 no.2
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• pp.122-133
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• 2015

The requirements for the successful treatment of all-ceramic restorations are not so different from the ones of conventional restorations. "The provisional restoration followed by an adequate tooth reduction" and "the accurately fitting prostheses with corresponding to final impression" can be the examples of them. Nevertheless, the one which all-ceramic restorations are distinguished from conventional restorations is the additional procedure of so called "bonding". In addition to the application of resin cement between "inner surface of restoration and outer surface of abutment", bonding technology can be also applied to the treatment process of "Post and Core" in particular if the abutments are non-vital teeth. Core build-up for all-ceramic crown is conducted with fiber post and tooth colored composite by considering the properties of the restorations transmitting light. We know well that a vital abutment is easier than a non-vital one to get the targeted goals for clinical success in connection with esthetics and structure. The creation of "Post and Core" with bonding technique is a decisive factor for a long-term success if the abutment is non-vital tooth with dentinal collapse. I would like to share my clinical experience about "post & core build-up and all-ceramic restoration bonding" out of several success strategies of all-ceramic crown with this review article.

• Journal of Digital Contents Society
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• v.8 no.3
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• pp.289-300
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• 2007

Recently, the number of People who want to study by online has been gradually increased. In addition, people's desire is increasing that represents their special knowledge and personality with new paradigm of UCC(User Created Contents). Most of the educational web-sites offer currently boring and unified educational contents without interesting objects. Therefore I want to solve these problems of existing online educational web-sites and I strongly propose the method of design to make the place educational and useful that everyone can enjoy and manifest the user's dispositions. On this study, it's possible to make pleasant environment and improve educational effects on cyber space by designing it in accordance with the individual tastes which have various design elements, beauties and facilities by the customized design method. As a result, this study proposes the model of online educational web-site having various interfaces and focusing on the customized design.

• The Journal of Korean Academy of Prosthodontics
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• v.34 no.1
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• pp.15-30
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• 1996

저작은 치아, 악골, 저작근 뿐만 아니라 근 신경계, 고위 중추까지 복합적으로 관여되는 기능적 행위이다. 저작 형태는 다양한 모양을 가지나 두 가지 전형적인 군, 즉, 전방에서 관찰 시 그 양상이 수직적이며 절단 (chopping) 운동을 하는 군과 주로 측방으로 이루어지며 연마 (grinding)를 하는 군으로 나눌 수 있다. 본 연구의 목적은 저작 형태의 차이가 교합면 마모에 미치는 영향을 조사하는 것이다. 두개 하악 관절과 저작 습관에 이상이 없으며 교합면에 수복물이 없는 치과 대학생으로 하악 운동 궤적 기록기를 이용하여 상기의 전형적인 2가지 저작 형태를 보이는 각 15명씩을 피검자로 선택하였다. 각 피검자에 대한 임상 검사를 통해 ordinal scale로 교합면 마모의 등급을 조사하여, 평균 치아 마모도와 부위에 따른 치아 마모도를 비교 조사하였다. 각 피검자에 대한 인상 채득 후 모형을 제작하고 arbitrary scale로 교합면 마모의 등급을 조사하여, 평균 치아 마모도와 부위에 따른 치아 마모도를 비교 조사하고 저작측과 비저작측 마모를 비교 조사하였으며 수평 마모면과 수직 마모면을 비교 조사하였다. 1. 평균 치아 마모도는 ordinal scale로 측정하였을 때, 절단형과 연마형간에 유의할 만한 차이가 없었다.(p >0.05) 2. 부위에 따른 치아의 마모도는 ordinal scale로 측정하였을 때, 절단형과 연마형간에 유의할 만한 차이가 없었다.(p >0.05) 3. 평균 치아 마모도는 arbitrary scale로 측정하였을 때, 절단형에 비교하여 연마형에서 높은 마모도를 보였다.(p<0.05). 4. 절단형에 비교하여 연마형은 arbitrary scale로 측정하였을 때, 구치부에서는 높은 마모도를 보였으며 전치부에서는 유의할 만한 차이가 없었다(p<0.05) 5. 구치 평균 치아 마모도와 부위에 따른 치아의 마모도는 균형측에서 절단형과 연마형간에 유의할 만한 차이를 보이지 않았다(p>0.05). 6. 전치 평균 치아 마모도와 부위에 따른 치아의 마모도는 수평 마모면과 수직 마모면 비교시, 절단형과 연마형간에 유의할 만한 차이를 보이지 않았다.(p>0.05)

• The Journal of Korean Academy of Prosthodontics
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• v.56 no.4
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• pp.295-301
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• 2018

To obtain denture retention, support, and stability in Class III edentulous cases with flat alveolar ridges and extensive flabby tissue is very difficult. The patient was a 72-year-old male who wore ill-fitting 20 year old dentures made by non-medical institutions. There was flabby tissue on the maxillary anterior ridge. The patient showed Angle Class III skeletal relationship with severe protruded mandible. First, temporary dentures were fabricated to restore the masticatory function, and final dentures were made through non- pressure impression technique and careful the arrangement of the posterior resin teeth. Improvement of the retention and stability of the denture during the occlusal force application is reported.

• Journal of Dental Rehabilitation and Applied Science
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• v.34 no.2
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• pp.127-136
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• 2018

The patient who has severely absorbed residual ridges, treatments are challenging to satisfy many factors: support, retention, stability, etc. The neutral zone or monoplane occlusion with non-anatomical tooth would be helpful to get additional retention and stability. The monoplane occlusion has been used long time because it can eliminate horizontal forces and many other advantages. The lingualized occlusion was introduced to improve chewing efficiency and esthetics. But from a stability aspect, it seems controversy between monoplane occlusion and lingualized occlusion. This case report shows the results of the treat two flat residual ridge patients using functional impression; piezography, and made 2 other dentures with monoplane and lingualized occlusion that patient can select denture.

• The Journal of Korean Academy of Prosthodontics
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• v.21 no.1
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• pp.59-66
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• 1983

Distal extension partial dentures are supported by both the relatively rigid teeth and the resilient mucosa. So impression techniques of residual alveolar ridge in case of distal extension partial denture have particular importance in order to broad distribution of the masticatory force. McLean recognized the need for recording the tissues supporting distal extension partial denture base in functional form to equalize the resilient and non-resilient support, and this was called functional impression. Many investigators proposed various techniques of the functional impression for a distal extension partial denture, but only a little studies were performed about displacement of soft tissue under distal extension partial denture base. The purpose of this study is to investigate the amount of vertical displacement of the soft tissue under distal extension partial denture base by different functional impression techniques. Impression techniques used were Z.O.P. Impression, Selective Tissue Placement Impression, Functional Relining Impression. Measurement of the vertical displacement of soft tissue were made with Depth Gauge and Measuring Platform. A Anatomic Impression was used as a control. The results were tested statistically using 3 way ANOVA and Scheffe test. The followings were the results obtained from this study. 1. The greatest amount of soft tissue displacement was observed in the center of the retromolar pad. 2. No significant differences were found between the crest of alveolar ridge and the buccal shelf area. 3. The greatest soft tissue displacement was observed in Functional Relining Impression using Iowa wax, and the least displacement was observed in Selective Tissue Placement Impression using murcaptan rubber base. 4. No significant differences were found between finger pressure and biting pressure in Z.O.P. Impression, but greater displacement was observed by biting pressure than finger pressure in Functional Reling Impression.

• The Journal of Korean Academy of Prosthodontics
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• v.58 no.4
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• pp.378-384
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• 2020

For patients with unstable mandibular movements and centric relation of the mandible due to long-term use of ill-fitting dentures, the successful fabrication of new dentures is challenging. Before fabrication new dentures, registration of centric relation is the critical point in such cases. In this case, treatment dentures with a flat occlusal table were used to stabilize mandibular movements and to register centric relation. In order to reflect the patient's jaw relation and vertical dimension obtained through the treatment dentures to the final denture, the treatment dentures were digitally duplicated, and impressions and jaw relations were obtained using the duplicated therapeutic dentures. The clinical results were satisfactory on the aspect of aesthetic and masticatory functioned.