2,719 research outputs found
Anomalous Single Production of the Fourth Generation Neutrino at Future ep Colliders
Possible single productions of the fourth standard model generation neutrino
via anomalous interactions at the future ep colliders are studied. Signatures
of such anomalous processes and backgrounds are discussed in detail. Discovery
limits for neutrino mass and achievable values of anomalous coupling strength
are determined.Comment: 11 pages, 6 figures, 5 table
Synaptic Noise Facilitates the Emergence of Self-Organized Criticality in the Caenorhabditis elegans Neuronal Network
Avalanches with power-law distributed size parameters have been observed in
neuronal networks. This observation might be a manifestation of the
self-organized criticality (SOC). Yet, the physiological mechanicsm of this
behavior is currently unknown. Describing synaptic noise as transmission
failures mainly originating from the probabilistic nature of neurotransmitter
release, this study investigates the potential of this noise as a mechanism for
driving the functional architecture of the neuronal networks towards SOC. To
this end, a simple finite state neuron model, with activity dependent and
synapse specific failure probabilities, was built based on the known anatomical
connectivity data of the nematode Ceanorhabditis elegans. Beginning from random
values, it was observed that synaptic noise levels picked out a set of synapses
and consequently an active subnetwork which generates power-law distributed
neuronal avalanches. The findings of this study brings up the possibility that
synaptic failures might be a component of physiological processes underlying
SOC in neuronal networks
Holonomy reduced dynamics of triatomic molecular systems
Whereas it is easy to reduce the translational symmetry of a molecular system
by using, e.g., Jacobi coordinates the situation is much more involved for the
rotational symmetry. In this paper we address the latter problem using {\it
holonomy reduction}. We suggest that the configuration space may be considered
as the reduced holonomy bundle with a connection induced by the mechanical
connection. Using the fact that for the special case of the three-body problem,
the holonomy group is SO(2) (as opposed to SO(3) like in systems with more than
three bodies) we obtain a holonomy reduced configuration space of topology . The dynamics then takes place on the cotangent
bundle over the holonomy reduced configuration space. On this phase space there
is an symmetry action coming from the conserved reduced angular momentum
which can be reduced using the standard symplectic reduction method. Using a
theorem by Arnold it follows that the resulting symmetry reduced phase space is
again a natural mechanical phase space, i.e. a cotangent bundle. This is
different from what is obtained from the usual approach where symplectic
reduction is used from the outset. This difference is discussed in some detail,
and a connection between the reduced dynamics of a triatomic molecule and the
motion of a charged particle in a magnetic field is established.Comment: 11 pages, submitted to J. Phys.
Possible Single Resonant Production of the Fourth Generation Charged Leptons at Colliders
Single resonant productions of the fourth standard model generation charged
lepton via anomalous interactions at gamma e colliders based on future linear
e^+ e^- colliders with 500 GeV and 1 TeV center of mass energies are studied.
Signatures of and
anomalous processes followed by the hadronic and leptonic decay of the Z boson
and corresponding standard model backgrounds are discussed in details. The
lowest necessary luminosities to observe these processes and the achievable
values of the anomalous coupling strengths are determined.Comment: 9 pages, 6 figures, 4 table
Aydin folk tales
Çalışmamızda masal üzerine genel tanımlara yer verilip, masal üzerine yapılan çalışmalara değinilmiştir. Aydın ili ve çevresindeki masal ortamı ile masal anlatıcılarının hayatlarının yanısıra; geçmişteki geleneksel masal ortamları aktarılarak, anlatılan masalların değerlendirme ve analizi yapılmıştır. Masallardaki jest ve mimikler tespit edilmiş, ayrıca masallar sadeleştirilerek düzenlenmiştir. Çalışmamızda masallarda tip numaraları dikkate alınarak incelenmiş, Aydın masallarının varyantları ortaya konulmuştur.
Aydın Halk Masalları isimli çalışmamızda, 31 adet masal alan araştırması yapılarak derlenmiştir. Gelişen teknoloji ve kitle iletişim araçlarının her geçen gün yaşam alanlarımızda yaygınlaşması, en büyük aşınmayı sözlü kültür unsurlarında gerçekleştirmiştir. En önemli toplumsal kültür miraslarından biri olan masal ortamları, teknolojik gelişmelerin karşısında her geçen gün yok olmaktadır.
Masalların zaman içinde tamamen yok olmadan ivedilikle derlenmesi ve incelenmesi gerekmektedir. Bu çalışmada Aydın masalları bu bilinç ve dikkatle ele alınmış ve kaynak kişilerin zihninden tamamen kaybolmadan yazıya geçirilmiştir.In this study,the general descriptions of folk-tale were given and the studies on folk-tale were mentioned.Besides the folk-tale culture in Aydın,the lives of folk-tale orators,the environments of traditional folk-tales in the past,the evaluations and analysis of told folk-tales were administered.The gestures and mimics in the folk-tales were studied and the folk-tales were redesigned in summarized form.In this study,the folk-tales were studied according to folk-tale coding system and the variations of folk-tales of Aydın were established.
The study,the folk-tales in Aydın,consists thirty-one folk-tales.The effects of technology and the mass-media in our life made the strongest erosion in our oral cultural units.The folk-tale environment,one of our most important cultural heritage is decaying due to technological advances.
The folk-tales should be studied and evaluated as soon as possible
before they have vanished.The folk-tales in Aydın were studied according to this perspective and were written down before theh have vanished from the memories
Synaptic noise facilitates the emergence of self-organized criticality in the Caenorhabditis elegans neuronal network
Avalanches with power-law distributed size parameters have been observed in neuronal networks. This observation might be a manifestation of self-organized criticality (SOC). Yet, the physiological mechanisms of this behaviour are currently unknown. Describing synaptic noise as transmission failures mainly originating from the probabilistic nature of neurotransmitter release, this study investigates the potential of this noise as a mechanism for driving the functional architecture of the neuronal networks towards SOC. To this end, a simple finite state neuron model, with activity dependent and synapse specific failure probabilities, was built based on the known anatomical connectivity data of the nematode Ceanorhabditis elegans. Beginning from random values, it was observed that synaptic noise levels picked out a set of synapses and consequently an active subnetwork that generates power-law distributed neuronal avalanches. The findings of this study bring up the possibility that synaptic failures might be a component of physiological processes underlying SOC in neuronal networks. © 2018, © 2018 Taylor & Francis
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