186,211 research outputs found
Radiation absorbing aerosol
No full textThis a study about the impact of radiation-absorbing (or light-absorbing) aerosols (black carbon, dust, brown carbon) on the climate, through the direct effect and deposition on the snow. The results have been reported in these publications:
Tuccella, P., Curci, G., Pitari, G., Lee, S., & Jo, D. S. ( 2020). Direct radiative effect of absorbing aerosols: sensitivity to mixing state, brown carbon and soil dust refractive index and shape. Journal of Geophysical Research: Atmospheres, 125, https://doi.org/10.1029/2019JD030967
Tuccella, P., Pitari, G., Colaiuda, V., Raparelli, E., and Curci, G.: Present-day radiative effect from radiation-absorbing aerosols in snow, Atmos. Chem. Phys., 21, 6875–6893, https://doi.org/10.5194/acp-21-6875-2021, 2021
The role of aerosol–radiation–cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara
No full textAuthor-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
COMPARATIVE ANALYSIS OF PHYSICAL ACTIVITY, CLIMACTERIC SYMPTOMS, AND OPTIMISM IN EARLY VS LATE POSTMENOPAUSAL WOMEN
No full textPurpose: Numerous studies highlight the importance of maintaining a healthy lifestyle and being physically active to improve quality of life and reduce the risk of developing chronic non-communicable dis
eases. These precautions are particularly crucial for menopausal
women, as the reduction in estrogen levels can lead to increased body fat, stress, and depression. These changes often result in feelings of inadequacy and a reduced desire to exercise and care for oneself. This cross-sectional study aims to evaluate the differences in physical activity (PA), body composition, climacteric symptoms, and optimism between women in early and late postmenopause.
Methods: The sample included 20 women, divided into early post
menopause (EP; n = 10) and late postmenopause (LP; n = 10)1. All
women wore the accelerometers Actigraph GT3X ? 4 consecutive
days to monitor their levels of PA (sedentary, light PA, moderate
vigorous PA and steps/day). The cut-off points proposed by Kamada
et al. 2 were considered and physical activity was classified according to WHO 3 guidelines. Body mass index was calculated, and the
presence of obesity was considered for values C 35% 4. Climacteric
symptoms were evaluated using the Greene Climacteric Scale 5, and
the Revised Life Orientation Test 6 was used to assess optimism. Data
were summarized using descriptive statistics, and analysis was con
ducted using either the Student’s t-test or the Mann–Whitney test.
Significance was accepted as p B 0.05.
Results: The majority of the sample had a natural menopause (95%)
and didnt report using hormone therapy (85%). Differences in age
(p = 0.01) were identified between the two groups under analysis
(55.80 ± 4.84 years in EP and 62.32 ± 5.28 years in LP), and obe
sity was identified in 9 participants.
Most of the sample was physically active (90%), but 75% of them
took fewer than 10,000 steps per day. The average Greene Climac
teric Scale score was 0.96 points (± 0.57), with significant differences (p = 0.05) observed only between the two groups in relation to vasomotor symptoms. Women in LP presented less
sedentary behaviour (3833.30 min/week in LP and 4125.00 min/week
in EP; p = 0.05) and a higher number of daily steps (9769.30 and
7733.00, respectively).
Conclusions: The findings suggest that women who have been
menopausal for more than 6 years experience higher levels of vaso
motor symptoms compared to those in early perimenopause (EP).
Conversely, these women exhibit less sedentary behavior and take
more steps per day
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Using Artificial Neural Networks to Couple Satellite C-band Synthetic Aperture Radar Interferometry and Alpine3D Numerical Model for the Estimation of Snow Cover Extent, Height and Density
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
EVALUATION OF VISUAL-PERCEPTUAL ABILITIES IN BADMINTON ATHLETES
No full textPurpose: Visual-perceptual abilities play a pivotal role in sports
performance, particularly in disciplines requiring rapid decision
making and precise perception. In badminton, athletes have to follow fast-moving objects, anticipate opponent movements, and execute precise strokes. The present study aimed to assess and compare visual performance across a range of domains between competitive badminton players and age-matched controls. It was hypothesized that badminton expertise would be associated with superior performance on multiple visual and oculomotor function measures.
Methods: Seventy-two participants were recruited: 36 competitive
badminton players (21M/15F, age 22.9 ± 2.4 years, 13.2 ± 3.1 years
of practice) and 36 controls (21M/15F, age 22.3 ± 1.7 years). Visual
perceptual assessments were conducted using the Tetra system and
the EyeSwift Pro system and included: binocular visual acuity
(LogMAR), stereopsis (Wirt test), reaction time (ms), pursuit eye
movements, saccadic latency and velocity (ms), contrast sensitivity
(0.5–12 cpd), and fixation stability. Due to non-normal distributions
in most variables, Mann–Whitney U tests were employed for con
tinuous variables, with effect sizes calculated as r =|Z|/HN. Chi
square tests were used for categorical pursuit variables. Bonferroni
correction was applied to control for multiple comparisons.
Results: After Bonferroni correction, badminton players demon
strated significantly superior performance in five visual domains.
Visual acuity was markedly better in both left eye (- 0.085 ± 0.08
LogMAR, p\0.001, r = 0.528) and right eye (- 0.079 ± 0.76
LogMAR, p\0.001, r = 0.524). Reaction time showed the largest
effect (0.269 ± 0.058 vs 0.411 ± 0.072 s, p\0.001, r = 0.760).
Overall contrast sensitivity was superior (p\0.001, r = 0.414), and
right eye saccadic latency was reduced (p = 0.002, r = 0.364). No
significant differences were found in stereopsis (p = 0.149), left eye
saccadic parameters, fixation stability, saccadic velocity, or pursuit
movements after correction.
Conclusions: This comprehensive analysis provides evidence that
competitive badminton players possess superior visual abilities across multiple domains. These findings support the hypothesis that high level badminton participation is associated with enhanced visual performance, likely reflecting both self-selection of individuals with superior visual abilities and training-induced neuroplastic adaptations. The lack of group differences in saccadic peak velocity, despite shorter latencies in badminton players, may indicate that visual expertise in this population is primarily associated with faster initiation rather than alterations in the kinematic properties of eye
movements. Future longitudinal studies should investigate the relative contributions of predisposition versus training-induced adaptations
Combined Effect of High-Resolution Land Cover and Grid Resolution on Surface NO2 Concentrations
No full textHigh-resolution air quality simulations are often performed using different nested domains and resolutions. In this study, the variability of nitrogen dioxide (NO2) concentrations estimated from two nested domains focused on Portugal (D2 and D3), with 5 and 1 km horizontal grid resolutions, respectively, was investigated by applying the WRF-Chem model for the year 2015. The main goal and innovative aspect of this study is the simulation of a whole year with high resolutions to analyse the spatial variability under the simulation grids in conjunction with detailed land cover (LC) data specifically processed for these high-resolution domains. The model evaluation was focused on Portuguese air quality monitoring stations taking into consideration the station typology. As main results, it should be noted that (i) D3 urban LC categories enhanced pollution hotspots; (ii) generally, modelled NO2 was underestimated, except for rural stations; (iii) differences between D2 and D3 estimates were small; (iv) higher resolution did not impact model performance; and (v) hourly D2 estimates presented an acceptable quality level for policy support. These modelled values are based on a detailed LC classification (100 m horizontal resolution) and coarse spatial resolution (approximately 10 km) emission inventory, the latter suitable for portraying background air pollution problems. Thus, if the goal is to characterise urban/local-scale pollution patterns, the use of high grid resolution could be advantageous, as long as the input data are properly represented
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