Institution
Bielefeld University
Education•Bielefeld, Nordrhein-Westfalen, Germany•
About: Bielefeld University is a education organization based out in Bielefeld, Nordrhein-Westfalen, Germany. It is known for research contribution in the topics: Population & Quantum chromodynamics. The organization has 10123 authors who have published 26576 publications receiving 728250 citations. The organization is also known as: University of Bielefeld & UNIVERSITAET BIELEFELD.
Topics: Population, Quantum chromodynamics, Gene, Context (language use), Quark
Papers published on a yearly basis
Papers
More filters
••
TL;DR: On the basis of analogies and homologies between the proteins involved in DNA translocation and protein secretion, a common basic model for these processes is presented.
162 citations
••
TL;DR: The quark mass dependence of various response functions, which contribute to chiral susceptibilities and the specific heat in the staggered fermion formulation of two-flavor QCD, is studied.
Abstract: We study the quark mass dependence of various response functions, which contribute to chiral susceptibilities and the specific heat in the staggered fermion formulation of two-flavor QCD. This yields information about the critical exponents \ensuremath{\alpha}, \ensuremath{\beta}, and \ensuremath{\delta}. In the case of the chiral susceptibility, obtained as a derivative of the chiral order parameter with respect to the quark mass, we calculate all contributions. This allows us to construct a cumulant of the order parameter, which is a scaling function and yields a direct determination of the critical exponent \ensuremath{\delta}. All our results are consistent with a second order phase transition.
162 citations
••
TL;DR: This review summarizes the most important biological findings described by Walknet and how they can be simulated and the ability of this decentralized reactive controller to form the basis for the simulation of higher-level cognitive faculties exceeding the capabilities of insects.
Abstract: Walknet comprises an artificial neural network that allows for the simulation of a considerable amount of behavioral data obtained from walking and standing stick insects. It has been tested by kinematic and dynamic simulations as well as on a number of six-legged robots. Over the years, various different expansions of this network have been provided leading to different versions of Walknet. This review summarizes the most important biological findings described by Walknet and how they can be simulated. Walknet shows how a number of properties observed in insects may emerge from a decentralized architecture. Examples are the continuum of so-called "gaits," coordination of up to 18 leg joints during stance when walking forward or backward over uneven surfaces and negotiation of curves, dealing with leg loss, as well as being able following motion trajectories without explicit precalculation. The different Walknet versions are compared to other approaches describing insect-inspired hexapod walking. Finally, we briefly address the ability of this decentralized reactive controller to form the basis for the simulation of higher-level cognitive faculties exceeding the capabilities of insects.
162 citations
••
01 Jan 1977
TL;DR: In this paper, the notion of expected figures based on ideas of Freenet on expected elements (positions moyennes) in metric spaces is introduced and studied in a probabilistic manner.
Abstract: One can find in nature various sorts of figures which challenge one to study them by probabilistic methods. In this paper we are concerned with the notion of expected figures based on ideas of Freenet [5] on expected elements (‘positions moyennes’) in metric spaces.
161 citations
••
TL;DR: Results show that stromelysin-1, matrilysin, gelatinases A and B and fibroblast and neutrophil collagenases cleave at a common, preferred site in the aggrecan interglobular domain, and additionally that both fibro Blast and neutophil collagenase cleaves at a second sites in the interglOBular domain that is not available to stromelyin or gelatinases.
Abstract: The actions of recombinant human fibroblast collagenase (MMP1), purified polymorphonuclear leucocyte collagenase (MMP8) and their N-terminal catalytic domain fragments against cartilage aggrecan and an aggrecan G1-G2 fragment have been investigated in vitro. After activation with recombinant human stromelysin and typsin, both collagenases were able to degrade human and porcine aggrecans to a similar extent. An N-terminal G1-G2 fragment (150 kDa) was used to identify specific cleavage sites occurring within the proteinase-sensitive interglobular domain between G1 and G2. Two specific sites were found; one at an Asn341-Phe342 bond and another at Asp441-Leu442 (human sequence). This specificity of the collagenases for aggrecan G1-G2 was identical with that of the truncated metalloproteinase matrilysin (MMP7), but different from those of stromelysin (MMP3) and the gelatinases (MMP2 or gelatinase A; MMP9 or gelatinase B) which cleave at the Asn-Phe site, but not the Asp-Leu site. In addition, collagenase catalytic fragments lacking C-terminal hemopexin-like domains were tested and shown to exhibit the same specificities for the G1-G2 fragment as the full-length enzymes. Thus the specificity of the collagenases for cartilage aggrecan was not influenced by the presence or absence of the C-terminal domain. Together with our previous findings, the results show that stromelysin-1, matrilysin, gelatinases A and B and fibroblast and neutrophil collagenases cleave at a common, preferred site in the aggrecan interglobular domain, and additionally that both fibroblast and neutrophil collagenases cleave at a second site in the interglobular domain that is not available to stromelysin or gelatinases.
161 citations
Authors
Showing all 10375 results
Name | H-index | Papers | Citations |
---|---|---|---|
Stefan Grimme | 113 | 680 | 105087 |
Alfred Pühler | 102 | 658 | 45871 |
James Barber | 102 | 642 | 42397 |
Swagata Mukherjee | 101 | 1048 | 46234 |
Hans-Joachim Werner | 98 | 317 | 48508 |
Krzysztof Redlich | 98 | 609 | 32693 |
Graham C. Walker | 93 | 381 | 36875 |
Christian Meyer | 93 | 1081 | 38149 |
Muhammad Farooq | 92 | 1341 | 37533 |
Jean Willy Andre Cleymans | 90 | 542 | 27685 |
Bernhard T. Baune | 90 | 608 | 50706 |
Martin Wikelski | 89 | 420 | 25821 |
Niklas Luhmann | 85 | 421 | 42743 |
Achim Müller | 85 | 926 | 35874 |
Oliver T. Wolf | 83 | 337 | 24211 |