In the scope of medical image processing, segmentation is important and difficult. There are still two problems which trouble us in this field. One is how to determine the number of clusters in an image and the other is how to segment medical images containing lesions. A new segmentation method called DDC, based on difference of mutual information (dMI) and pixon, is proposed in this paper. Exp...

In 1979, the mechanism of chemical carcinogenesis, a challenging and difficult scientific problem pending for a number of years, was explained by Dai Qianhuan. The mechanism named di-region theory predicted that a carcinogen always metabolizes to form a special bi-functional alkylating agent. This agent induces cross-linkages between the complementary base pairs in DNA and switches on initial m...

Ana Sanchez-Sanchez, Isabel Asenjo-Sanz, Lorea Buruaga, José A. Pomposo* ––––––––– A. Sanchez-Sanchez, I. Asenjo-Sanz, L. Buruaga Centro de Física de Materiales (CSIC, UPV/EHU) Materials Physics Center, Paseo Manuel de Lardizábal 5, 20018 San Sebastián, Spain J. A. Pomposo Centro de Física de Materiales (CSIC, UPV/EHU) Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018 San Sebastián,...

Hossein Sojoudi, Matthew R. Walsh, Karen K. Gleason,* and Gareth H. McKinley* Dr. Hossein Sojoudi, Prof. Karen K. Gleason Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States E-mail: [email protected] Dr. Hossein Sojoudi, Prof. Gareth H. McKinley Department of Mechanical Engineering, Massachusetts Institute of Technolog...

Despite the "darker than black" association attributed to carbon nanotube forests, in this paper we show that it is also possible to grow these structures, over heat-sensitive substrates, featuring highly transmissive characteristics from the UV to infrared wavelengths, for forest heights as high as 20μm. We interpret the optical transmission in terms of light propagation along channels that ar...

1 DOI: 10.1002/smll.201102350 The Removal of Single Layers from Multi-Layer Graphene by Low Energy Electron Stimulation Jason D. Jones, Rakesh K. Shah, Guido F. Verbeck, and Jose M. Perez* [*] Prof. J. M. Perez Department of Physics University of North Texas Denton, TX 76203 (USA) E-mail: [email protected] J. D. Jones, R. K. Shah Department of Physics University of North Texas Denton, TX 76203 (US...