• Korean Journal of Logic
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• v.9 no.1
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• pp.173-204
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• 2006

최근의 시간에 관한 철학적 논의에서 새로운 무시제 이론가들은 시제 문장들의 진리조건을 무시제 문장들을 통해 부여할 수 있다는 언어철학적 결과를 통해, 시제 사실들과 같은 것들을 받아들일 필요가 없다고 주장함으로써 A-이론을 비판해 왔다. 이 논문에서는 형이상학적 논변을 새롭게 제시함으로써, 언어 철학적인 논변과 달리 B-이론은 유지될 수 없으며, 오히려 A-이론이 시간에 대한 올바른 이론임을 논증하게 된다. 그리고 이러한 논의가 이루어지는 가운데 존속과 변화에 관한 흥미로운 문제들이 다루어지며, 시간 철학에서의 몇몇 개념에 관한 명료화 작업이 이루어진다. 나아가 이를 바탕으로 A-이론과도 B-이론과도 다른 새로운 대안적인 시간 이론이 제시되고, 이 이론이 지니는 특징들과 장점들이 이야기된다.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.3
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• pp.532-542
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• 2007

The purpose of study was to review the transition of dentition according to the evolution of man to know the background of the dental problems like hypodontia and malocclusion. Man is Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Primates, Suborder Haplorrhini, Superfamily Hominoidea, Family Hominidae, Genus Homo, Species Sapiens by taxonomy. The first hominid was Australopithecus which appeared c. 4 millions of years ago and showed bipedalism and distinct dentition. Homos began with H. habilis who appeared c. 2.5 millions of years ago and made stone tools, and then H. erectus and H. neanderthalensis appeared and disappeared until H. sapiens came. The dental formula of primitive mammalians which was I3 C1 P4 M3 changed to I2 C1 P4 M3 of primitive primates, to I2 C1 P3 M3 of Haplorrhini, and to I2 C1 P2 M3 of hominoids. That of H. sapiens is changing to I2 C1 P2 M2.The box type dentition of hominoids changed to the omega type dentition of Australopithecus, and to the parabolic type of H. sapiens. The size of teeth decreased continually, especially the canine and sexual dimorphism. The dentition moved backward and downward to the cranial crown according to the increase of the brain and decrease of the jaws. It was suggested that the change of diet to the starchy foods, food processing, and the development of cooking reduced the necessity of mastication and caused the change of dentition. The future of H. sapiens who is quite a new species in the earth histroy and is now causing the mass extinction of other species is hard to see. It seems that hypodontia and malocclusion are related to the dentition change according to the evolution of man and is likely to increase.