Systems of globally coupled phase oscillators can have robust attractors that are heteroclinic networks. We investigate such a heteroclinic network between partially synchronized states where the phases cluster into three groups. For the coupling considered there exist 30 different three-cluster states in the case of five oscillators. We study the structure of the heteroclinic network and demon...

I N T R O D U C T I O N Pharmacological data were among the evidence which led to the view that the over-all electrophysiological manifestations of different excitable membranes are composites of a number of independently assorting electrogenic processes (Grundfest, 1961 a, b). Subsequently available data (cf. Grundfest, 1963, 1966 a, b) have reenforced this view, that the excitable membrane is a

A Primer on Mathematical Models in Biology Lee A. Segel and Leah Edelstein-Keshet This textbook grew out of a course that the popular and highly respected applied mathematician Lee Segel taught. It introduces differential equations, biological applications, and simulations and emphasizes molecular events, excitable systems, and small protein and genetic circuits. It is intended for upper-level ...

This paper proposes the Intra Trustcenter Protocol (ITP), a flexible and secure management protocol for communication between arbitrary trustcenter components. Unlike other existing protocols (like PKCS#7, CMP or XKMS) ITP focuses on the communication within a trustcenter. It is powerful enough for transferring complex messages which are machine and human readable and easy to understand. In add...

Existing research on Smallto Medium-sized Manufacturers (SMMs) pays scant attention to factors affecting their growth in the contact of paradigms of competition and, particularly, segments of the supply chain in which they operate. This work adopts a supply chain perspective to propose a business definition and model for the process of the SMMs understanding of, responding to, andinf1uencing cu...

The reliability of the Mycobacteria Growth Indicator Tube (MGIT) 960 system for rapid detection of mycobacteria in clinical specimens was evaluated and compared to the radiometric method (BACTEC 460TB) and to mycobacterial culture on Lowenstein-Jensen (LJ) medium. Clinical specimens (n = 590) were tested without selection. A total of 121 (20.5%) isolates of mycobacteria were recovered; 98 (81.0...

The reliability and longevity of any storage medium is a key issue for archivists and preservationists as well as for the creators of important information. This is particularly true in the case of digital media such as DVD and CD where a sufficient number of errors may render the disc unreadable. This paper describes an initial stability study of commercially available recordable DVD and CD me...

This note describes first ideas to archive event data on mass storage media. Some crucial items still need detailed discussions with the DESY Hamburg computer center and with the HERA-B collaborations. Suggestions and comments are welcome.