28,709 research outputs found
Electroweak Chiral Lagrangian for a Hypercharge-universal Topcolor Model
Electroweak chiral Lagrangian for a hypercharge-universal topcolor model is
investigated. We find that the assignments of universal hypercharge improve the
results obtained previously from K.Lane's prototype natural TC2 model by
allowing a larger Z' mass resulting in a very small T parameter and the S
parameter is still around the order of +1Comment: 12 pages, 7 figure
Non-Hermitian dynamics of slowly-varying Hamiltonians
We develop a theoretical description of non-Hermitian time evolution that
accounts for the break- down of the adiabatic theorem. We obtain closed-form
expressions for the time-dependent state amplitudes, involving the complex
eigen-energies as well as inter-band Berry connections calculated using basis
sets from appropriately-chosen Schur decompositions. Using a two-level system
as an example, we show that our theory accurately captures the phenomenon of
"sudden transitions", where the system state abruptly jumps from one eigenstate
to another.Comment: 12 pages, 4 figure
3D Face Synthesis Driven by Personality Impression
Synthesizing 3D faces that give certain personality impressions is commonly
needed in computer games, animations, and virtual world applications for
producing realistic virtual characters. In this paper, we propose a novel
approach to synthesize 3D faces based on personality impression for creating
virtual characters. Our approach consists of two major steps. In the first
step, we train classifiers using deep convolutional neural networks on a
dataset of images with personality impression annotations, which are capable of
predicting the personality impression of a face. In the second step, given a 3D
face and a desired personality impression type as user inputs, our approach
optimizes the facial details against the trained classifiers, so as to
synthesize a face which gives the desired personality impression. We
demonstrate our approach for synthesizing 3D faces giving desired personality
impressions on a variety of 3D face models. Perceptual studies show that the
perceived personality impressions of the synthesized faces agree with the
target personality impressions specified for synthesizing the faces. Please
refer to the supplementary materials for all results.Comment: 8pages;6 figure
Dynamical Computation on Coefficients of Electroweak Chiral Lagrangian from One-doublet and Topcolor-assisted Technicolor Models
Based on previous studies deriving the chiral Lagrangian for pseudo scalar
mesons from the first principle of QCD, we derive the electroweak chiral
Lagrangian and build up a formulation for computing its coefficients from
one-doublet technicolor model and a schematic topcolor-assisted technicolor
model. We find that the coefficients of the electroweak chiral Lagrangian for
the topcolor-assisted technicolor model are divided into three parts: direct
TC2 interaction part, TC1 and TC2 induced effective Z' particle contribution
part, and ordinary quarks contribution part. The first two parts are computed
in this paper and we show that the direct TC2 interaction part is the same as
that in the one-doublet technicolor model, while effective Z' contributions are
at least proportional to the p^2 order parameter \beta_1 in the electroweak
chiral Lagrangian and typical features of topcolor-assisted technicolor model
are that it only allows positive T and U parameters and the T parameter varies
in the range 0\sim 1/(25\alpha), the upper bound of T parameter will decrease
as long as Z' mass become large. The S parameter can be either positive or
negative depending on whether the Z' mass is large or small. The Z' mass is
also bounded above and the upper bound depend on value of T parameter. We
obtain the values for all the coefficients of the electroweak chiral Lagrangian
up to order of p^4.Comment: 52 pages, 15 figure
Identification of a novel TSC2 c.3610G > A, p.G1204R mutation contribute to aberrant splicing in a patient with classical tuberous sclerosis complex: a case report
Background: Tuberous sclerosis complex (TSC) is an autosomal dominant disorder characterized by hamartomas in
any organ systems. Mutations in the TSC1 or TSC2 gene lead to the dysfunction of hamartin or tuberin proteins,
which cause tuberous sclerosis complex.
Case presentation: We describe the clinical characteristics of patients from a Chinese family with tuberous sclerosis
complex and analyze the functional consequences of their causal genetic mutations. A novel heterozygous mutation
(c.3610G > A) at the last nucleotide of exon 29 in TSC2 was identified. On the protein level, this variant was presumed
to be a missense mutation (p.Gly1204Arg). However, the splicing assay revealed that this mutation also leads to the
whole TSC2 exon 29 skipping, besides the wild-type transcript. The mutated transcript results in an in-frame deletion of
71 amino acids (p.Gly1133_Thr1203del) and its ratio with the normal splice product is of about 44:56.
Conclusions: The novel c.3610G > A TSC2 mutation was identified in association with tuberous sclerosis complex. And
it was proven to code both for a missense-carrying transcript (56%), and for an isoform lacking exon 29 (44%)
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