We study numerically how the intercellular conductance affects the process of spiral breakup in an array of coupled excitable cells. The cell dynamics are described by the Aliev-Panfilov model, and the intercellular connection is made via Ohmic elements. We find that decreasing intercellular conductance can prevent the breaking up of a spiral wave into a complex spatiotemporal pattern. We study...

the internal infections of erwinia amylovora have important roles for disease beginning in the spring and dissemination of inoculum through infected vegetative planting material and nursery trees. in this study, we survey internal infection of erwinia amylovora in symptomless commercial apple cultivars in karaj and damavand cities, using optimized diagnostic methods such as plating on semi sele...

the present study sets out to integrate the performance-based seismic design approach with the connection topology optimization method. performance-based connection topology optimization concept aims to simultaneously optimize the size of members and the type of connections with respect to the framework of performance-based seismic design. this new optimization concept is carried out for unbrac...

tooth/implant supported fixed prostheses may present biomechanical design problems, as the implant is rigidly anchored within the alveolus, whereas the tooth is attached by the periodontal ligament to the bone allowing movement. many clinicians prefer tooth/implant supported fixed prosthesis designs with rigid connectors. however, there are some doubts about the effect of attachment placement i...

Abstract: This research work presents a new rigid connection constructed with channels. In order to assess its hysteresis behavior, three specimens with different cover plates and six specimens with different panel zone thickness have been considered. The energy absorbed by the connection and the behavior of the panel zone were studied during cyclic loading and compared with those of connectio...

Keiko Motoyama, Yuji Nakai, Tomoya Miyashita, Yuichiro Fukui, Maki Morita, Kazutsuka Sanmiya, Hiroyuki Sakakibara, Ichiro Matsumoto, Keiko Abe, Takafumi Yakabe, Nobuhiro Yajima, and Kayoko Shimoi Graduate School of Nutritional and Environmental Sciences, Institute for Environmental Sciences, and Global COE Program, University of Shizuoka, Shizuoka; Graduate School of Agricultural and Life Scien...

† This work was supported in part by NSF Grants CCR-9207971 and CCR-9509589, funding from the Apple Computer Advanced Technology Group, and donations from Thinking Machines Corporation. Our T.M.C. CM-5 was purchased through NSF Grant CDA-9024618, with matching funding from the University of Wisconsin Graduate School. ‡ Editor, IEEE P1596.2 proposed Standard. The views expressed in this paper ar...

AutoBAHN (Automated Bandwidth Allocation across Heterogeneous Networks) has specified and is now prototyping a Bandwidth on Demand (BoD) service intended to operate in a multidomain environment using heterogeneous transmission technologies. The AutoBAHN system aims at providing a guaranteed capacity, connection-oriented service between two end points. This paper highlights the architecture of t...