Lodi, M., Chinosi, S., Faverzani, S. and Ferro, E. 2007. Clinical and ultrasonographic features of the Canine Hepatocellular Carcinoma (CHC). Veterinary Research Communications, 31(Suppl. 1), 293-295 ...PUBLICATION ABSTRACT
The ASTRI Mini-Array (MA) is an INAF project to build and operate a facility to study astronomical sources emitting at very high-energy in the TeV spectral band. The ASTRI MA consists of a group of ...nine innovative Imaging Atmospheric Cherenkov telescopes. The telescopes will be installed at the Teide Astronomical Observatory of the Instituto de Astrofisica de Canarias (IAC) in Tenerife (Canary Islands, Spain) on the basis of a host agreement with INAF. Thanks to its expected overall performance, better than those of current Cherenkov telescopes' arrays for energies above ∼5 TeV and up to 100 TeV and beyond, the ASTRI MA will represent an important instrument to perform deep observations of the galactic and extragalactic sky at these energies.
The GAPS programme at TNG Benatti, S; Damasso, M; Desidera, S ...
Astronomy & astrophysics,
07/2020, Letnik:
639
Journal Article
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Context. Observations of exoplanetary systems demonstrate that a wide variety of planetary architectures are possible. Determining the rate of occurrence of Solar System analogues – with inner ...terrestrial planets and outer gas giants – remains an open question. Aims. Within the framework of the Global Architecture of Planetary Systems (GAPS) project, we collected more than 300 spectra with HARPS-N at the Telescopio Nazionale Galileo for the bright G9V star HD 164922. This target is known to host one gas giant planet in a wide orbit (Pb ~1200 days, semi-major axis ~ 2 au) and a Neptune-mass planet with a period of Pc ~76 days. We aimed to investigate the presence of additional low-mass companions in the inner region of the system. Methods. We compared the radial velocities (RV) and the activity indices derived from the HARPS-N time series to measure the rotation period of the star and used a Gaussian process regression to describe the behaviour of the stellar activity. We then combined a model of planetary and stellar activity signals in an RV time series composed of almost 700 high-precision RVs, both from HARPS-N and literature data. We performed a dynamical analysis to evaluate the stability of the system and the allowed regions for additional potential companions. We performed experiments on the injection and recovery of additional planetary signals to gauge the sensitivity thresholds in minimum mass and orbital separation imposed by our data. Results. Thanks to the high sensitivity of the HARPS-N dataset, we detected an additional inner super-Earth with an RV semi-amplitude of 1.3 ± 0.2 m s−1 and a minimum mass of md sin i = 4 ± 1 M⊕. It orbits HD 164922 with a period of 12.458 ± 0.003 days. We disentangled the planetary signal from activity and measured a stellar rotation period of ~ 42 days. The dynamical analysis shows the long-term stability of the orbits of the three-planet system and allows us to identify the permitted regions for additional planets in the semi-major axis ranges 0.18–0.21 au and 0.6–1.4 au. The latter partially includes the habitable zone of the system. We did not detect any planet in these regions, down to minimum detectable masses of 5 and 18 M⊕, respectively. A larger region of allowed planets is expected beyond the orbit of planet b, where our sampling rules out bodies with minimum mass >50 M⊕. The planetary orbital parameters and the location of the snow line suggest that this system has been shaped by a gas disk migration process that halted after its dissipation.
The stack gases of a municipal solid waste incinerator (MSWI), and ambient air were sampled in four locations around the plant for the analysis of polychlorinated dibenzo-p-dioxins and ...polychlorinated dibenzofurans (PCDDs/Fs). The sampling area was close to an industrial area near Trieste, in north-east Italy. The purpose of the study was to estimate the impact of the MSWI emissions and to distinguish the contribution of these emissions from other potential emission sources in the industrial area.
PCDD/F atmospheric concentrations were similar to those generally detected in urban–rural areas with one location about 2–3 times more contaminated than the others. Since the most contaminated location was inside the industrial area but upwind of the MSWI, principal component analysis (PCA) was used to establish whether other sources were the cause. This analysis clearly showed that a local steel plant’s emission was the main source of PCDDs/Fs in ambient air. This study highlights the usefulness of multivariate data analysis such as PCA to identify, among different potential emission sources, the one really responsible for the contamination.
Introduction
Endovascular embolization is an important modality in the treatment of cerebral arteriovenous malformations (AVMs). Onyx is an ethylene vinyl alcohol copolymer dissolved in dimethyl ...sulfoxide that is approved for use as an embolic agent for brain AVMs.
Case Report
We describe a case of revascularization of an occluded vertebro-basilar artery during embolization of an AVM with Onyx, by using the Merci device.
Conclusion
Reflux embolization of patent vessels is a rare complication of using Onyx to treat AVMs. It can be successfully managed by retrieving the Onyx substance using mechanical retrieval devices like the Merci device.
Aims. A flux-calibrated high-resolution spectrum of the airglow emission is a practical λ-calibration reference for astronomical spectral observations. It is also useful for constraining the ...molecular parameters of the OH molecule and the physical conditions in the upper mesosphere. Methods. We used the data collected during the first technical commissioning of the GIANO spectrograph at the Telescopio Nazionale Galileo (TNG). The high-resolution (R ≃ 50 000) spectrum simultaneously covers the 0.95–2.4 μm wavelength range. Relative flux calibration is achieved by the simultaneous observation of a spectrophotometric standard star. Results. We derived a list of improved positions and intensities of OH infrared lines. The list includes Λ-split doublets, many of which are spectrally resolved. Compared with previous works, the new results correct errors in the wavelengths of the Q-branch transitions. The relative fluxes of OH lines from different vibrational bands show remarkable deviations from theoretical predictions: the Δv = 3, 4 lines are a factor of 2 and 4 brighter than expected. We also found evidence of a significant fraction (1–4%) of OH molecules with a non-thermal population of high-J levels. Finally, we list wavelengths and fluxes of 153 lines not attributable to OH. Most of these can be associated with O2, while 37 lines in the H band are not identified. The O2 and unidentified lines in the H band account for ≃5% of the total airglow flux in this band.
LOCNES (LOw-Cost NIR Extended Solar telescope) is a solar telescope installed at the TNG (Telescopio Nazionale Galileo). It feeds the light of the Sun into the NIR spectrograph GIANO-B through a 40-m ...patch of optical fibers. LOCNES has been designed to obtain high signal-to-noise ratio spectra of the Sun as a star with an accurate wavelength calibration through molecular-band cells. This is an entirely new area of investigation that will provide timely results to improve the search of telluric planets with NIR spectrographs such as iSHELL, CARMENES, and GIANO-B. We will extract several disc-integrated activity indicators and average magnetic field measurements for the Sun in the NIR. Eventually, they will be correlated with both the RV of the Sun-as-a -star and the resolved images of the solar disc in visible and NIR. Such an approach will allow for a better understanding of the origin of activity-induced RV variations in the two spectral domains and will help in improving the techniques for their corrections. In this paper, we outline the science drivers for the LOCNES project and its first commissioning results.
Background:
A nursing care plan is a guideline developed for a patient's needs. A well-documented care plan provides holistic patient-centred care and includes assessing, evaluating, and ...administering a variety of interventions as well as teaching patients and families. There are existing tools to measure nurses' knowledge, attitude, and practices in writing nursing care plans in many countries. However, cultural differences and most of the tools do not cover region-specific aspects of diseases, making it challenging to be used between countries.
Objective:
Thisstudy aimed to develop and validate a tool for determining the knowledge, attitudes, and practices of nurses in writing nursing care plans at a teaching hospital in Gauteng province, South Africa.
Methods:
A cross-sectional study was conducted among 218 registered nurses in selected hospital wards. Reliability was examined using Cronbach alpha and item-total correlation, while validity was assessed using Exploratory Factor Analysis (EFA EFA) and convergent validity. SPSS for Windows (version 10.0; SPSS, Inc., Chicago, IL, USA) was used to analyze data.
Results
Cronbach's alpha was 0.75 for knowledge, 0.74 for attitude, and 0.77 for practices. The item-total correlation values ranged from -0.203 to 0.742. Kaiser-Meyer-Olkin was 0.877, 0.793, and 0.797 for the three dimensions, respectively and the Bartlett test was significant (p< 0.0001). The EFA showed that all the items had loadings ≥0.5 except for item A1. Knowledge and practice had a good convergent validity.
Implications for Nursing
Efforts to develop, validate and implement a new instrument to assess nursing knowledge, attitudes, and practice in writing nursing care plans improve communication between nursing staff, and involve patients more in their care, resulting in fewer medical errors and improving the quality of patient care.
Conclusion:
This study indicates that the tool has satisfactory reliability, and the use of EFA for the investigation of validity is adequate, but one item in the attitude dimension has a lower threshold value. Further confirmatory factor analysis studies with a larger sample size are needed to support construct validity.
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