1,328 research outputs found
Statistical Power Supply Dynamic Noise Prediction in Hierarchical Power Grid and Package Networks
One of the most crucial high performance systems-on-chip design challenge is to front their power supply noise sufferance due to high frequencies, huge number of functional blocks and technology scaling down. Marking a difference from traditional post physical-design static voltage drop analysis, /a priori dynamic voltage drop/evaluation is the focus of this work. It takes into account transient currents and on-chip and package /RLC/ parasitics while exploring the power grid design solution space: Design countermeasures can be thus early defined and long post physical-design verification cycles can be shortened. As shown by an extensive set of results, a carefully extracted and modular grid library assures realistic evaluation of parasitics impact on noise and facilitates the power network construction; furthermore statistical analysis guarantees a correct current envelope evaluation and Spice simulations endorse reliable result
Magnetic and axial vector form factors as probes of orbital angular momentum in the proton
We have recently examined the static properties of the baryon octet (magnetic
moments and axial vector coupling constants) in a generalized quark model in
which the angular momentum of a polarized nucleon is partly spin and partly orbital . The orbital momentum was
represented by the rotation of a flux-tube connecting the three constituent
quarks. The best fit is obtained with ,
. We now consider the consequences of this
idea for the -dependence of the magnetic and axial vector form factors. It
is found that the isovector magnetic form factor
differs in shape from the axial form factor by an amount that
depends on the spatial distribution of orbital angular momentum. The model of a
rigidly rotating flux-tube leads to a relation between the magnetic, axial
vector and matter radii, , where , . The shape of is found to be close to a dipole
with GeV.Comment: 18 pages, 5 ps-figures, uses RevTe
Epigenetic mechanisms in oral cancer: new diagnostic and therapeutic strategies
Complexity and heterogeneity are frequently present during the development and progression of carcinogenesis and, in the last 15 years, significant progress made in clinical research underlines the role of
some epigenetic mechanisms. The most important characteristics of the epigenetic concept are that these
events are reversible, not related to modifications in the structure of DNA and may drive fundamental cell
signaling alterations1. Among these systems of communication in normal and pathological conditions,
also microbiome and staminal cells2 seem to be important. These new profiles of pathological communication develop novel diagnostic, prognostic and therapeutic tool
Oral microbiota, health, and cancer: the dual face of the same coin in the field of the host-microbe interactome
In recent years, within the extensive research regarding human microbiota and chronic diseases, new medical and laboratory technologies have played a crucial role in understanding more complex biological pathways between human cells and microbes. On the other hand, molecular and cellular diversity and their involvement in health responses to changing host conditions have only recently been understood, through the development of brand-new laboratory tools based on âomics approaches. The continuous insertion of already conceptualized, new experimental large datasets and raw data onto bibliographic platforms means that they are now accessible for subsequent elaboration by other researchers. This aspect has allowed the creation of an interactive mesh of proteins, genes, and small molecules, usually called, interactome or interactomics
Radiosounding: Possible change in aerological data due to instrument change
radiosounding system allows to measure the profile of some meteorological quantities (temperature, humidity, pressure) from the ground up to a certain altitude. Such systems are continuously used by meteorological services in order to perform periodical measurements during the day, at
pre-determined times. The evolution of instrumentation technology leads to a fast obsolescence of equipment
through time, so that, inevitably, new instrumentation replaces the old one. The new VAISALA Radiosound RS92 has been recently introduced to substitute previous model RS90. The RS90 is currently used by many national and international institutes, including the Italian Air Force Meteorological Service (Servizio Meteorologico dellâAeronautica Militare). In order to assess the way in which the substitution of RS90s with the new RS92s would affect measures performed by the altitude observation network with regard also to the historical series, several comparative measurements have been conducted by the âReparto Sperimentazioni di Meteorologia Aeronauticaâ at Vigna di Valle (Rome). During this testing series,
Company VAISALA has given a remarkable level of cooperation by a continuous presence of technicians. The entire test has been performed according to WMO (World Meteorological Organization) protocols
The role of organizational citizenship behavior and gender between job satisfaction and task performance
Job satisfaction (JS) is an indicator of individual psychosocial health. Consistent evidence showed that voluntary extra-role behavior in organizations, namely organizational citizenship behavior (OCB), can also contribute to individual psychological health. JS has been found to positively influence employeesâ OCB, and both JS and OCB have been found to predict employeesâ task performance (TP). The purpose of this study was to investigate whether employeesâ OCB mediates the relationship of JS with TP, taking into consideration gender as a potential moderator, and other sociodemographic and work-related characteristics as confounding variables. A total of 518 employees, 54.6% women, aged 19â66 years with a mean age of about 36 years, completed measures of JS, OCB, and TP. Results showed a partial mediation of OCB in the JS-TP relationship, which was invariant across gender. A potential practical implication of findings is that human resource managers and practitioners might ultimately benefit male and female employeesâ well-being as well as the organizationsâ productivity by developing targeted individual-and group-level trainings and interventions to enhance JS and OCB
Whitening with 980 nm diode laser in a dyschromic devitalized tooth with aesthetic value: long-term success
In our society, the progress of aesthetic standards
has led to increasing demands from patients to have
white and healthy teeth as an index of beauty and
health. The main advantages of the laser bleaching
technique include greater safety and control, as well
as the prevention of tissue damage, the reduction of
application times and greater patient satisfaction.
Numerous studies in the literature underline that
bleaching with diode laser is a safe. The purpose of
this in vivo study was to assess the whitening effect
of the 980 nm diode laser in combination with the
whitening gel, containing hydrogen peroxide, in
the discoloration treatment of a dental element
undergone to endodontic therap
A Cluster Analysis of Cyclists in Europe: Common Patterns, Behaviours, and Attitudes
This study uses cluster analysis on a sample of regular cyclists from six European countries (the U.K., the Netherlands, Sweden, Hungary, Italy, and Spain) to shed light on common cycling patterns, demographic characteristics, and attitudes. Participants completed an online survey on cycling behaviour, attitudes towards cycling, discomfort while cycling in mixed traffic, cycling environment and comparative cycling risk perception. A two-step cluster analysis was performed to identify segments of cyclists based on cycling patterns, and a multinomial logistic regression analysis was used to profile the segments. The two-step cluster analysis yielded three components. Leisure-time cyclists cycled almost exclusively for leisure/training, had a clear preference for car use relative to bicycle, and low riding frequency. Resolute Cyclists were characterised by a high variety of cycling trip purpose, a clear preference for bicycle use relative to the car, and high riding frequency. Convenience Cyclists were characterised by cycling for personal business or leisure/training but not for commuting, no evident preference for bicycle vs car, and medium riding frequency. The value of the present study is to highlight commonalities in patterns, characteristics, and attitudes of cyclists in Europe. Our study showed that cycling patterns and habits are linked to psychosocial variables such as attitudes and the cycling environment, explicitly highlighting the importance of discomfort in mixed traffic and the relationship with cycling culture
CORRELATION BETWEEN CHRONIC MUCOSAL TRAUMA AND ORAL CANCER: A CASE REPORT AND REVIEW OF THE LITERATURE
Abstract â Objective: Squamous cell carcinoma is the most common malignancy in the oral cavity
representing the 90% of all oral malignancies that affect oral cavity. Primary risk factors associated
with oral cancer are alcohol and tobacco consumption. However, other emerging risk factors have
been proposed in Literature, including chronic trauma of the oral mucosa related to dental prostheses and incongruous restorations. Therefore, the aim of this study was to review the literature on the
correlation between oral carcinoma and chronic irritative trauma, with the help of a case report and
with focus on clinical features and differential diagnosis.
Materials and Methods: A literature search on MEDLINE, PubMed, ScienceDirect, Cochrane
Database of Systematic Reviews and Wiley InterScience was performed, using the following words:
Oral Cancer, chronic Trauma and Denture Trauma in various combinations.
Results: The review produced 1356 results, but only 8 articles met the inclusion criteria and were
involved in the review. No association has been proven between chronic mucosal trauma and oral
cancer. Carcinoma has been shown to develop more frequently in trauma regions, particularly in
the tongue. As for the data on the gender and age of affected patients, it emerges that most of the
greatest incidence occurs around the sixth and seventh decade of life and men are more affected
than women.
Conclusions: Due to the heterogeneity of the different studies and the strong presence of
other factors such as smoking and alcohol, the role of trauma in carcinogenesis is unclear. Further
molecular, epidemiological and case-control studies are needed to define this correlation. It is advisable to carry out more restricted checks in patients at risk with dental prostheses
Semileptonic decays, magnetic moments and spin distributions of spin-1/2 baryons with sea contribution
Spin-1/2 baryons are considered as a composite system made out of a "core" of
three quarks surrounded by a "sea" (of gluons and -pairs) which is
specified by its total quantum numbers. Specifically, we assume this sea to be
a flavor octet with spin-0 or 1 but no color. We show our model can provide
very goods fits to magnetic moments and semileptonic decay data using
experimental errors. The predictions for spin distributions are in reasonable
agreement with experiment.Comment: To be published in Int. J. of Mod. Phys.
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