1,035 research outputs found
Effective Actions for 0+1 Dimensional Scalar QED and its SUSY Generalization at
We compute the effective actions for the 0+1 dimensional scalar field
interacting with an Abelian gauge background, as well as for its supersymmetric
generalization at finite temperature.Comment: 5 pages, Latex fil
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Distributing Condoms and Hope : Race, Sex, and Science in Youth Sexual Health Promotion
This project uses discursive, visual, and ethnographic approaches situated in a critical feminist methodology to understand how ways of knowing about youth sexuality and reproduction influence community health work. I understand the âproblemâ in this inquiry as the discursive contexts that limit critical ways of knowing about young peopleâs sexual subjectivities and practices and about the design of policies and programs. Although race, class, gender, and sexuality are understood in the public health literature as important social determinants of health, there is a lack of research that applies a critical, feminist lens to these constructs. I draw on three years of ethnographic research in a small, northeastern city with a large Puerto Rican population and high rates of teen pregnancy to illustrate how community health workers take up and transform discourses of race, science, and sexuality as well as how teen parents situate their embodied experiences within these discourses. I combine interviews with key informants, participant observation at coalition meetings and community events, and visual analysis of stories produced by pregnant and parenting young women to argue that the production of authoritative racialized, sexual scientific knowledge both obscures and contributes to health and social inequalities. The politics of youth sexuality and reproduction easily reify what everyone âknows to be trueâ and enable community health workers to naturalize claims about race, culture, sexual health, and causality. I argue that a reproductive justice framework can shift the discursive context of youth sexuality and reproduction in the city to promote racial, economic, and sexual justice
The Hamiltonian Structures of the super KP hierarchy Associated with an Even Parity SuperLax Operator
We consider the even parity superLax operator for the supersymmetric KP
hierarchy of the form and obtain
the two Hamiltonian structures following the standard method of Gelfand and
Dikii. We observe that the first Hamiltonian structure is local and linear
whereas the second Hamiltonian structure is non-local and nonlinear among the
superfields appearing in the Lax operator. We discuss briefly on their
connections with the super algebra.Comment: 14 pages, Plain tex, IC/93/17
Faddeev-Jackiw Analysis of Topological Mass Generating Action
We analyze the gauge symmetry of a topological mass generating action in four
dimensions which contains both a vector and a second rank antisymmetric tensor
fields. In the Abelian case, this system induces an effective mass for the
vector gauge field via a topological coupling in the presence of a
kinetic term for the antisymmetric tensor field , while maintaining a gauge
symmetry. On the other hand, for the non-Abelian case the field does not
have a gauge symmetry unless an auxiliary vector field is introduced to the
system. We analyze this change of symmetry in the Faddeev-Jackiw formalism, and
show how the auxiliary vector field enhances the symmetry. At the same time
this enhanced gauge symmetry becomes reducible. We also show this phenomenon in
this analysis.Comment: 20 pages, REVTe
Bioecologia e controle de Spodoptera frugiperda em milho.
bitstream/item/67387/1/Documento-344.pd
On the constrained structure of duality symmetric Maxwell theory
The constrained structure of the duality invariant form of Maxwell theory is
considered in the Hamiltonian formulation of Dirac as well as from the
symplectic viewpoint. Compared to the former the latter approach is found to be
more economical and elegant. Distinctions from the constrained analysis of the
usual Maxwell theory are pointed out and their implications are also discussed.Comment: Latex, 12 page
BFFT quantization with nonlinear constraints
We consider the method due to Batalin, Fradkin, Fradkina, and Tyutin (BFFT)
that makes the conversion of second-class constraints into first-class ones for
the case of nonlinear theories. We first present a general analysis of an
attempt to simplify the method, showing the conditions that must be fulfilled
in order to have first-class constraints for nonlinear theories but that are
linear in the auxiliary variables. There are cases where this simplification
cannot be done and the full BFFT method has to be used. However, in the way the
method is formulated, we show with details that it is not practicable to be
done. Finally, we speculate on a solution for these problems.Comment: 19 pages, Late
Hamiltonian symplectic embedding of the massive noncommutative U(1) Theory
We show that the massive noncommutative U(1) theory is embedded in a gauge
theory using an alternative systematic way, which is based on the symplectic
framework. The embedded Hamiltonian density is obtained after a finite number
of steps in the iterative symplectic process, oppositely to the result proposed
using the BFFT formalism. This alternative formalism of embedding shows how to
get a set of dynamically equivalent embedded Hamiltonian densities.Comment: 16 pages, no figures, revtex4, corrected version, references
additione
Clinical indicators of occult musculoskeletal pain in aggressive dogs
AGGRESSIVE behaviour by dogs is the most frequent behaviour
problem reported to veterinary behaviour clinics (Bamberger and
Houpt 2006, Fatjo and others 2007). The behaviour is a serious
problem for the victims (Weiss and others 1998) and for the
animals themselves, since it often reflects a negative underlying
emotional state, especially if associated with pain (Bamberger
and Houpt 2006, Hsu and Sun 2010). Pain may lower the dogâs
general threshold for aggressive behaviour, while also encouraging
specific aggressive displays as part of a protective/defensive
response (Rutherford 2002, Muir and others 2004, Landsberg
and others 2013). Beaver (1983) has suggested that more than a
quarter (28.2 per cent) of dogs exhibiting aggression do so
because of a medical condition, including pain, but pain-related
aggression has been considered to account for only a small per
cent of the total caseload in behaviour clinics, that is, 2â3.3 per
cent (Beaver 1983, Borchelt 1983). However, when pain is identi-
fied, the data from Beaver (1983) suggest the prognosis is excellent,
with all cases in her case review reported to have a
successful treatment outcome. A recent small case series of
aggressive dogs with a pain focus indicated that musculoskeletal
pain from hip dysplasia and osteoarthritis of the elbow was the
main cause of pain, occurring in 75 per cent (nine of 12 cases) of
these cases (Camps and others 2012)
New forms of BRST symmetry in rigid rotor
We derive the different forms of BRST symmetry by using the
Batalin-Fradkin-Vilkovisky formalism in a rigid rotor. The so called
"dual-BRST" symmetry is obtained from usual BRST symmetry by making a canonical
transformation in the ghost sector. On the other hand, a canonical
transformation in the sector involving Lagrange multiplier and its
corresponding momentum leads to a new form of BRST as well as dual-BRST
symmetry.Comment: 10 Pages, revtex, No Fig
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