A new graph algorithm for multiscale segmentation of threedimensional medical data sets is presented. It is a threedimensional generalisation of an existing two-dimensional Mumford-Shah region-merging segmentation algorithm. The Mumford-Shah functional formulation leads to improved segmentation results compared to alternative approaches; the graph theoretic approach yields improved performance ...

ferromagnetism: Co–ZnO versus Co–CeO2 Lubna R. Shah, Weigang Wang, Hao Zhu, Bakhtyar Ali, Y. Q. Song, H. W. Zhang, S. I. Shah, and J. Q. Xiao Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA School of Microelectronic and Solid-State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China Materials Science and Eng...

創造性を考えたときに新奇性 (novelty) と適切性 (appropriateness)は異なる文化におい ても同じように働くのだろうか implicit theory approach を用いて 400 名以上の学生の比較文化的な研究を行った 対象国は日本,中国,アメリカ.「料理」と「教科書」を評定 新奇性が創造性の評定に強く影響していることがわかった アメリカ人よりも中国人のほうが新奇性の操作により大きく左右されていた アメリカ人と日本人にとって適切性は,創造性とそのものの価値の判断に重要であった 新奇性も適切性も共に大きな影響があった. 比較文化的な研究は国家間の違いを同定するというよりむしろ,創造性そのものの理解に 役立つと考えられる Introduction Creativity まず最初に文化の中での創造性がどんなものかを理解しなければならない 一般の人も創造性の研究...

Finding a match between partially available deformable shapes is a challenging problem with numerous applications. The problem is usually approached by computing local descriptors on a pair of shapes and then establishing a point-wise correspondence between the two. In this paper, we introduce an alternative correspondence-less approach to matching fragments to an entire shape undergoing a non-...

Let G be a connected reductive linear algebraic group. We use geometric methods to investigate G-completely reducible subgroups of G, giving new criteria for G-complete reducibility. We show that a subgroup of G is G-completely reducible if and only if it is strongly reductive in G; this allows us to use ideas of R.W. Richardson and Hilbert– Mumford–Kempf from geometric invariant theory. We ded...

The goal of this paper is to generalize a theorem of Fujiwara (formerly Deligne’s conjecture) to the situation appearing in a joint work [KV] with David Kazhdan on the global Langlands correspondence over function fields. Moreover, our proof is much simpler than the original one and applies to more general situations like algebraic spaces or Deligne–Mumford stacks without any changes. We also i...

In this paper we introduce a notion of unilateral slope for the Mumford-Shah functional, and provide an explicit formula in the case of smooth cracks. We show that the slope is not lower semicontinuous and study the corresponding relaxed functional.