Track-based improvement in the jet transverse momentum resolution for ATLAS

We present a track-based method for improving the jet momentum resolution in ATLAS. Information is added to the reconstructed jet after the standard jet energy scale corrections have been applied. Track-based corrections are implemented, and a 10 â 15% improvement in the jet transverse momentum resolution at low pT is achieved. The method is explained, and some validation and physics results are presented. Additional variables are described and analyzed for their resolution improvement potential

Relating gravitational wave constraints from primordial nucleosynthesis, pulsar timing, laser interferometers, and the CMB: implications for the early universe

We derive a general master equation relating the gravitational-wave observables r and Omega_gw(f). Here r is the tensor-to-scalar ratio, constrained by cosmic-microwave-background (CMB) experiments; and Omega_gw(f) is the energy spectrum of primordial gravitational-waves, constrained e.g. by pulsar-timing measurements, laser-interferometer experiments, and Big Bang Nucleosynthesis (BBN). Differentiating the master equation yields a new expression for the tilt d(ln Omega_gw(f))/d(ln f). The relationship between r and Omega_gw(f) depends sensitively on the uncertain physics of the early universe, and we show that this uncertainty may be encapsulated (in a model-independent way) by two quantities: w_hat(f) and nt_hat(f), where nt_hat(f) is a certain logarithmic average over nt(k) (the primordial tensor spectral index); and w_hat(f) is a certain logarithmic average over w_tilde(a) (the effective equation-of-state in the early universe, after horizon re-entry). Here the effective equation-of-state parameter w_tilde(a) is a combination of the ordinary equation-of-state parameter w(a) and the bulk viscosity zeta(a). Thus, by comparing constraints on r and Omega_gw(f), one can obtain (remarkably tight) constraints in the [w_hat(f), nt_hat(f)] plane. In particular, this is the best way to constrain (or detect) the presence of a ``stiff'' energy component (with w > 1/3) in the early universe, prior to BBN. Finally, although most of our analysis does not assume inflation, we point out that if CMB experiments detect a non-zero value for r, then we will immediately obtain (as a free by-product) a new upper bound w_hat < 0.55 on the logarithmically averaged effective equation-of-state parameter during the ``primordial dark age'' between the end of inflation and the start of BBN.Comment: v1: 12 + 6 pages (main text + appendices), 7 figures; v2: fonts fixed in figure

Relic Gravitational Waves from String Cosmology

A large class of string-cosmology backgrounds leads to a spectrum of relic stochastic gravitational waves, strongly tilted towards high frequencies, and characterized by two basic parameters of the cosmological model. We estimate the required sensitivity for detection of the predicted gravitational radiation and show that a region of our parameter space is within reach for some of the planned gravitational-wave detectors.Comment: 14 pages, latex, 2 figures included as epsf file

Detecting relic gravitational radiation from string cosmology with LIGO

A characteristic spectrum of relic gravitational radiation is produced by a period of ``stringy inflation" in the early universe. This spectrum is unusual, because the energy-density rises rapidly with frequency. We show that correlation experiments with the two gravitational wave detectors being built for the Laser Interferometric Gravitational Observatory (LIGO) could detect this relic radiation, for certain ranges of the parameters that characterize the underlying string cosmology model.Comment: 6 pages, 5 eps figures, Revte

TRANSCRIAÇÃO EM QUADRINHOS: UM POEMA DE SÁ-CARNEIRO (RE)LIDO POR LAERTE COUTINHO

O presente artigo trata do caso singular de (re)leitura – e transcriação (Haroldo de Campos) – do poema “Feminina”, de Mário de Sá-Carneiro (1890–1916), operando com as noções de tradução intersemiótica (Roman Jakobson) e suporte de inscrição (Jacques Fontanille), e discutindo, nesse cenário teórico, o estatuto do texto literário (Gérard Genette; Walter Benjamin). Separados por quase cem anos e publicados em meios e suportes bastante diversos entre si, o poema original e a sua versão contemporânea, ilustrada em linguagem de quadrinhos por Laerte Coutinho, mantêm o frescor da novidade, da inventividade e da provocação. Nesse sentido, nosso objetivo será o de analisar a leitura do texto de Sá-Carneiro produzida por Laerte, que nos parece ser aquela de um gesto de apropriação e de (re)criação literárias que acaba por acentuar certos valores do texto original, em especial o da polêmica, que surge ressemantizada em tintas mais intensas na forma de um protesto

Asymmetric Inflationary Reheating and the Nature of Mirror Universe

The existence of a shadow world (or mirror universe) with matter and forces identical to that of the visible world but interacting with the latter only via gravity can be motivated by superstring theories as well as by recent attempts to understand the nature of a sterile neutrino needed if all known neutrino data are to be consistent with each other. A simple way to reconcile the constraints of big bang nucleosynthesis in such a theory is to postulate that the reheating temperature after inflation in the mirror universe is lower than that in the visible one. We have constructed explicit models that realize this proposal and have shown that the asymmetric reheating can be related to a difference of the electroweak symmetry breaking scales in the two sectors, which is needed for a solution of the neutrino puzzles in this picture. Cosmological implications of the mirror matter are also discussed.Comment: 13 pages, LATEX, no figures (slight textual changes, few references added

Transgender Patients: Communication Pearls for Pharmacists

Understanding the unique communication needs of transgender patients is critical in order to minimize health disparities and patient barriers to care. As this population gains more social and political acceptance, pharmacists must be equipped to provide medical acceptance through knowledge of how to appropriately communicate with these patients through active listening, empathy, and sensitivity, while maintaining a high standard of respect and privacy

Getting Started as a New Preceptor

Clinical experience in the healthcare field plays a crucial role in shaping future professionals into competent and well-rounded providers. Equally important is the ability to facilitate the learning process of learners to promote self-directed, lifelong learning and critical thinking.1-3 Preceptorship can vary in approach depending on the design of the learning experience: direct instruction, modeling, coaching, mentoring, and facilitiation.4-6 In addition, there are many teaching tools available such as One-Minute Preceptor, layered teaching, providing reflections, and thinking out loud.7-9 To be an effective preceptor, developing skills through self-reflection and seeking out professional development to strengthen areas of weakness are important. However, despite all the precepting methods, tools, and resources available, how does one truly know they are effective and accomplishing their goals as a preceptor? Many individuals can think of what they want to achieve and how they want to be perceived as a preceptor, but few develop a plan of how to accomplish it