222 research outputs found
Bosonic Structure of a 2-Dimensional Fermion Model with Interaction among Different Speices
We study a massive Thirring-like model in 2-dimensional space-time, which
contains two different species of fermions. This model is a field theoretical
version of the quantum mechanical model originally proposed by Gl\"{o}ckle,
Nogami and Fukui, where different fermions interact with each other through
-function potentials. We derive a corresponding boson model by the
bosonization technique in the path integral formulation. This is a simple but
non-trivial extension of the freedom of the bosonization technique. Operator
correspondences between fermion and boson fields are given. One of these could
not be realistically expected from the naive correspondence of the original
single-species models. It is essential for this point that in our model
fermions of the same kind do not interact with each other directly. We find
that for a specific value of the coupling constant, one boson field becomes
free while the other is a Sine-Gordon field. For this case, therefore, our
two-species model is equivalent to the ordinary Sine-Gordon model of a single
boson field.Comment: Latex file, 11pages, no figure, needs ptptex.st
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A fuzzy-based system for peer reliability in JXTA-overlay P2P considering number of interactions
The trustworthiness of peers is very important for safe communication in P2P system. In this paper, we propose a fuzzy-based reliability system for P2P Communications in JXTA-Overlay. We use three input parameters: Number of Interactions (NOI), Amount of Data Exchanged (ADE), and Reputation (R) and the output is Peer Reliability (PR). We evaluate the proposed system by computer simulations. The simulation results show that the proposed system have a good behaviour can be used successfully to evaluate the scale of reliability of the new peer connected in JXTA-Overlay.Peer ReviewedPostprint (author's final draft
Chylopericardium Caused by Non-small Cell Lung Cancer: A Rare Complication of Superior Vena Cava Syndrome
Yeast Eps15-like endocytic protein Pan1p regulates the interaction between endocytic vesicles, endosomes and the actin cytoskeleton
The actin cytoskeleton plays important roles in the formation and internalization of endocytic vesicles. In yeast, endocytic vesicles move towards early endosomes along actin cables, however, the molecular machinery regulating interaction between endocytic vesicles and actin cables is poorly understood. The Eps15-like protein Pan1p plays a key role in actin-mediated endocytosis and is negatively regulated by Ark1 and Prk1 kinases. Here we show that pan1 mutated to prevent phosphorylation at all 18 threonines, pan1-18TA, displayed almost the same endocytic defect as ark1Î prk1Î cells, and contained abnormal actin concentrations including several endocytic compartments. Early endosomes were highly localized in the actin concentrations and displayed movement along actin cables. The dephosphorylated form of Pan1p also caused stable associations between endocytic vesicles and actin cables, and between endocytic vesicles and endosomes. Thus Pan1 phosphorylation is part of a novel mechanism that regulates endocytic compartment interactions with each other and with actin cables
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