How Protons Shatter Colored Glass

We consider the implications of the Color Glass Condensate for the central region of p+A collisions. We compute the k_t distribution of radiated gluons and their rapidity distribution dN/dy analytically, both in the perturbative regime and in the region between the two saturation momenta. We find an analytic expression for the number of produced gluons which is valid when the saturation momentum of the proton is much less than that of the nucleus. We discuss the scaling of the produced multiplicity with A. We show that the slope of the rapidity density dN/dy provides an experimental measure for the renormalization-group evolution of the color charge density of the Color Glass Condensate (CGC). We also argue that these results are easily generalized to collisions of nuclei of different A at central rapidity, or with the same A but at a rapidity far from the central region.Comment: 9 pages, RevTex, 3 Figures; some typos corrected, the scaling of ^2 with dN/dy is derive

Pomeron loop and running coupling effects in high energy QCD evolution

Within the framework of a (1+1)-dimensional model which mimics evolution and scattering in QCD at high energy, we study the influence of the running of the coupling on the high-energy dynamics with Pomeron loops. We find that the particle number fluctuations are strongly suppressed by the running of the coupling, by at least one order of magnitude as compared to the case of a fixed coupling, for all the rapidities that we have investigated, up to Y=200. This reflects the slowing down of the evolution by running coupling effects, in particular, the large rapidity evolution which is required for the formation of the saturation front via diffusion. We conclude that, for all energies of interest, processes like deep inelastic scattering or forward particle production can be reliably studied within the framework of a mean-field approximation (like the Balitsky-Kovchegov equation) which includes running coupling effects.Comment: 23 pages, 8 figure

The Color Glass Condensate and hadron production in the forward region

We consider one loop corrections to single inclusive particle production in parton-nucleus scattering at high energies, treating the target nucleus as a Color Glass Condensate. We prove by explicit computation that in the leading log Q^2 approximation, these corrections lead to collinear factorization and DGLAP evolution of the projectile parton distribution and hadron fragmentation functions. At leading logarithmic level, and in single-inclusive cross sections, only two-point functions of Wilson lines in the adjoint and fundamental representations (Mueller's dipoles) arise, which can be obtained from the solution of the JIMWLK equations. The application of our results to forward-rapidity production at RHIC energy shows that, in general, recoil effects are large and that the forward rapidity region at RHIC is rather different from the central region at LHC, despite comparable gluon densities in the target. We show that both the quantum x-evolution of the high-density target as well as the DGLAP Q^2-evolution of the parton distribution and fragmentation functions are clearly seen in the BRAHMS data. This provides additional strong evidence for the Color Glass Condensate at RHIC.Comment: Final version to appear in NPA; 22 pages, 10 figures, v3; three new figures in appendix show that BRAHMS/STAR kinematics probe momentum fractions in the nucleus of 0.001 - 0.000

Intraoperative Ultrasound of the Liver: Actual Status and Indications

Intraoperative liver ultrasound represents an essential component in the hepatobiliary surgery arsenal, having an essential role in describing liver lesions, their topography, and loco-regional extension. It also has an important role in establishing surgical strategy, in modulating the surgeon decisions, and thus in preventing postoperative complications. This chapter tries to make a synthetic review of principal indications for using ultrasound in liver surgical treatment, underlining the liver’s lesions characteristics and advantages brought by this method. Also, we wanted to underline the importance that ultrasound has for guiding the surgeon in interventional intraoperative techniques or in any anatomical liver resection. The role of enhanced contrast intraoperative ultrasound is put in front by the better diagnostic results obtained for both primary and metastatic tumors of the liver

The Role of Visual Identity in Music Perception : A Talk with Specialists on Song Likability, Perceived Quality and Emotional Reactions

Since the music industry is oversaturated, the role of branding becomes of great importance. Although of a paramount value for success, the influence of visual identity on contemporary music perception is still poorly discussed. The present paper aims to exploratory assess the role of visual elements on the way music is perceived. Sixteen semi-structured interviews with music specialist are conducted. The primary topic approached refers to the role of visual identity in terms of song likability, perceived music quality and emotional reactions. The results suggest that branding may help in the differentiation process by creating memorability and clarity on the market. However, for a valuable creative product, there must be a balance between shaping the brand identity and maintaining the artist’s authenticity

Pandemic-Induced Shifts in Climate Change Perception and Energy Consumption Behaviors: A Cross-Country Analysis of Belgium, Italy, Romania, and Sweden

This research explores the impact of the COVID-19 pandemic on consumer behavior and preferences related to household energy consumption through actions to fight climate change in Belgium, Romania, Italy, and Sweden. Using data from two Eurobarometer surveys conducted in 2019 and 2021, the study examines shifts in climate change perception, actions to combat climate change, and the influence of socio-economic and demographic variables on these actions. Depending on the country, the findings reveal significant pandemic-induced changes in public perceptions of climate change and personal actions to combat it. Age, gender, and education level were found to influence climate change actions. Financial constraints also significantly influenced the adoption of energy-efficient behaviors. Our research enriches existing knowledge by exploring the influence of the COVID-19 pandemic on climate change perceptions and actions across diverse European countries, shedding light on the interplay between global crises and sustainability. The research methodology, including chi-square tests, logistic regression, and effect size measurements, provides a robust framework for understanding how economic factors and consumer behaviors are contributing to the development of effective energy policies

NUMERICAL ANALYSIS OF A VISCOUS TRANSMISSION

A viscous coupling is a simple device that transmits torque by shearing an oil film between one or more pairs of discs that are moving in relation to one another. Due to their many advantages, viscous couplings are studied in many applications such as fan transmissions in vehicles, pumps, winches, belt conveyors, wind turbines, tunnel boring machines. Using a CFD Software, this study examined how grooves affected the performance of a viscous coupling. The main objective of the reported work is to study the flow of the fluid film, the total temperature and the torque of a viscous coupling that is operating in different conditions

Ascites Syndrome Associated with Hypothyroidism in a Brahma Chicken: a Case Study and Review of the Literature

Ascites syndrome (AS) in chickens represents a major cause of mortality and the most frequent metabolic-related cause of abattoir carcass condemnation in broilers. Susceptibility of broiler chickens to ascites is determined by a complex interaction between genetically-controlled factors (as high-rate metabolism and peculiarity of the cardiovascular system) and exogenous factors such as nutrition, and temperature. Endocrine imbalances, especially thyroid-gland dysfunctions, are currently regarded as key-elements in the development of AS. The current case represents the first spontaneous case of hypothyroidism (goiter) associated with AS in broilers, bringing additional arguments to the theory which claims the role of thyroid dysfunction in this syndrome. Further studies of spontaneous cases which must include assessment of the thyroid hormones need be performed in order to better understand the link between thyroid gland dysfunction and the cardiopulmonary changes in the context of AS in birds