5,040 research outputs found
Causation’s Nuclear Future: Applying Proportional Liability to the Price-Anderson Act
For more than a quarter century, public discourse has pushed the nuclear-power industry in the direction of heavier regulation and greater scrutiny, effectively halting construction of new reactors. By focusing on contemporary fear of significant accidents, such discourse begs the question of what the nation\u27s court system would actually do should a major nuclear incident cause radiation-induced cancers.
Congress\u27s attempt to answer that question is the Price-Anderson Act, a broad statute addressing claims by the victims of a major nuclear accident. Lower courts interpreting the Act have repeatedly encountered a major stumbling block: it declares that judges must apply the antediluvian preponderance-of-the-evidence logic of state tort law, even though radiation science insists that the causes of radiation-induced cancers are more complex. After a major nuclear accident, the Act\u27s paradoxically outdated rules for adjudicating causation would make post-incident compensation unworkable.
This Note urges that nuclear-power-plant liability should not turn on eighteenth-century tort law. Drawing on modern scientific conclusions regarding the invariably statistical nature of cancer, this Note suggests a unitary federal standard for the Price-Anderson Act—that a defendant be deemed to have caused a plaintiff\u27s injury in direct proportion to the increased risk of harm the defendant has imposed. This proportional liability rule would not only fairly evaluate the costs borne by injured plaintiffs and protect a reawakening nuclear industry from the prospect of bank-breaking litigation, but would prove workable with only minor changes to the Price-Anderson Act\u27s standards of injury and fault
Generalization of the Schott energy in electrodynamic radiation theory
We discuss the origin of the Schott energy in the Abraham-Lorentz version of
electrodynamic radiation theory and how it can be used to explain some apparent
paradoxes. We also derive the generalization of this quantity for the
Ford-O'Connell equation, which has the merit of being derived exactly from a
microscopic Hamiltonian for an electron with structure and has been shown to be
free of the problems associated with the Abraham-Lorentz theory. We emphasize
that the instantaneous power supplied by the applied force not only gives rise
to radiation (acceleration fields), but it can change the kinetic energy of the
electron and change the Schott energy of the velocity fields. The important
role played by boundary conditions is noted
A quantum violation of the second law?
An apparent violation of the second law of thermodynamics occurs when an atom
coupled to a zero-temperature bath, being necessarily in an excited state, is
used to extract work from the bath. Here the fallacy is that it takes work to
couple the atom to the bath and this work must exceed that obtained from the
atom. For the example of an oscillator coupled to a bath described by the
single relaxation time model, the mean oscillator energy and the minimum work
required to couple the oscillator to the bath are both calculated explicitly
and in closed form. It is shown that the minimum work always exceeds the mean
oscillator energy, so there is no violation of the second law
Literary Cultures in/and Italian Studies
The article opens by considering how contemporary Italian Studies scholarship is situated in relation to the long-standing dominance of literary culture as a major disciplinary concern, and the persistence of traditionally conceived canons, questions, and methods. The authors discuss how the scope of literary research has expanded in recent years and become more enmeshed with sociological, political, and ideological enquiry. They review how previous definitions of literary cultures and practices have been refreshed with new theoretical and interdisciplinary approaches, and through transnational dialogues and collaborative modes of research. A diachronic survey discusses key innovations both in the study of canonical or ‘high culture’ literary phenomena – such as Dante, Leopardi, or Futurism –, and in engagements with previously overlooked writing in popular genres or media, or by socially marginalised authors. It concludes by reflecting on how literary studies is both critiqued and defended within current debates over the standing of humanities research within and beyond the academy
Signatures of the Youngest Starbursts: Optically-thick Thermal Bremsstrahlung Radio Sources in Henize 2-10
VLA radio continuum imaging reveals compact (<8 pc) ~1 mJy radio sources in
the central 5" starburst region of the blue compact galaxy Henize 2-10. We
interpret these radio knots as extremely young, ultra-dense HII regions. We
model their luminosities and spectral energy distributions, finding that they
are consistent with unusually dense HII regions having electron densities, 1500
cm^-3 < n_e < 5000 cm^-3, and sizes of 3-8 pc. Since these H II regions are not
visible in optical images, we propose that the radio data preferentially reveal
the youngest, densest, and most highly obscured starforming events. Energy
considerations imply that each of the five \HII regions contains ~750 O7V
equivalent stars, greater than the number found in 30 Doradus in the LMC. The
high densities imply an over-pressure compared to the typical interstellar
medium so that such objects must be short-lived (<0.5 Myr expansion
timescales). We conclude that the radio continuum maps reveal the very young
(<0.5 Myr) precursors of ``super starclusters'' or ``proto globular clusters''
which are prominent at optical and UV wavelengths in He 2-10. If the
ultra-dense HII regions are typical of those which we predict will be found in
other starbursting systems, then super starclusters spend 15% of their lifetime
in heavily-obscured environments, similar to Galactic ultra-compact HII
regions. This body of work leads us to propose that massive extragalactic star
clusters (i.e. proto globular clusters) with ages <10^6 yr may be most easily
identified by finding compact radio sources with optically-thick thermal
bremsstrahlung spectral signatures.Comment: AASTeX, 8 figures 2 included with psfig in text; other 6 in jpeg
format; Postscript versions of figures may be found at
http://zem.ucolick.org/chip/Research/young_clusters.html -- Accepted for
publication in the Astrophysical Journa
La alianza terapéutica en la terapia de aceptación y compromiso
Acceptance and Commitment Therapy (ACT) is a process-based intervention that promotes psychological flexibility by implementing six core processes. These include acceptance and awareness as well values and behavior change processes. Still, the primary vehicle for implementing these processes is the therapeutic relationship. Underscoring the importance of the relationship is paramount – it is the context in which the interventions emerge, allowing the therapist to shape psychological flexibility directly. We argue that the therapeutic alliance (TA) is co-created and is a critical factor contributing to the effectiveness of ACT. This paper focuses on the TA as a vital part of ACT treatment. We discuss the therapeutic alliance from an ACT perspective, explore different roles in implementing ACT, and conclude with a clinical case illustration. We more specifically focus on how the TA alliance and the therapeutic relationship can be a vehicle of change in ACT.La Terapia de Aceptación y Compromiso (ACT) es una intervención basada en procesos que promueve la flexibilidad psicológica implementando seis procesos centrales. Estos incluyen aceptación y conciencia como también procesos de valores y cambio conductuales. Sin embargo, el vehículo primario para implementar estas intervenciones es la relación terapéutica. En este trabajo discutimos que la Alianza Terapéutica (TA) es co-creada y es un factor crítico que contribuye a la efectividad de la implementación de ACT. Este artículo se enfoca en la TA como una parte vital del tratamiento ACT. Desarrollamos la alianza terapéutica desde la perspectiva de ACT, exploramos los diferentes roles que ocupa en la implementación de ACT y concluimos con un ejemplo clínico. Mas específicamente mostramos cómo la alianza terapéutica y la relación terapéutica pueden ser un vehículo de cambio en ACT
Consistency of a Causal Theory of Radiative Reaction with the Optical Theorem
The Abraham-Lorentz-Dirac equation for a point electron, while suffering from
runaway solutions and an acausal response to external forces, is compatible
with the optical theorem. We show that a theory of radiative reaction that
allows for a finite charge distribution is not only causal and free of runaway
solutions, but is also consistent with the optical theorem and the standard
formula for the Rayleigh scattering cross section.Comment: 4 pages, 2 figure
The clinical impact of serrated colorectal polyps
Serrated polyps (SPs) of the colorectum pose a novel challenge to practicing gastroenterologists. Previously thought benign and unimportant, there is now compelling evidence that SPs are responsible for a significant percentage of incident colorectal cancer worldwide. In contrast to conventional adenomas, which tend to be slow growing and polypoid, SPs have unique features that undermine current screening and surveillance practices. For example, sessile serrated polyps (SSPs) are flat, predominately right-sided, and thought to have the potential for rapid growth. Moreover, SSPs are subject to wide variations in endoscopic detection and pathologic interpretation. Unfortunately, little is known about the natural history of SPs, and current guidelines are based largely on expert opinion. In this review, we outline the current taxonomy, epidemiology, and management of SPs with an emphasis on the clinical and public health impact of these lesions
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Infrared spectroscopy in superfluid helium droplets
For more than two decades, encapsulation in superfluid helium nanodroplets has served as a reliable technique for probing the structure and dynamics of molecules and clusters at a low temperature of ≈0.37 K. Due to weak interactions between molecules and the host liquid helium, good spectral resolution can usually be achieved, making helium droplets an ideal matrix for spectroscopy in a wide spectral range from infrared to ultraviolet. Furthermore, rotational structure in the spectra of small molecules provides a unique probe for interactions with the superfluid on an atomic scale. This review presents a summary of results and a discussion of recent experimental developments in helium droplet spectroscopy with the emphasis laid on infrared studies. Initially, studies focused on single molecules and have been expanded to larger species, such as metal-molecular clusters, biomolecules, free radicals, ions, and proteins. © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group
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