scholarly journals Ultraviolet A Radiation and COVID‐19 Deaths in the USA with replication studies in England and Italy

2021 ◽  
Author(s):  
M. Cherrie ◽  
T. Clemens ◽  
C. Colandrea ◽  
Z. Feng ◽  
D.J. Webb ◽  
...  
Keyword(s):  
Ultraviolet A ◽  
Replication Studies ◽  
The Usa

scholarly journals Ultraviolet A Radiation and COVID-19 Deaths in the USA with replication studies in England and Italy

2020 ◽  
Author(s):  
Mark Cherrie ◽  
Tom Clemens ◽  
Claudio Colandrea ◽  
Zhiqiang Feng ◽  
David J Webb ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Risk Factors ◽  
Metabolic Syndrome ◽  
Vitamin D ◽  
Meteorological Conditions ◽  
Ultraviolet A ◽  
Replication Studies ◽  
The Usa ◽  
The Relationship ◽  
Uva Radiation

AbstractSeasonal variation in environmental meteorological conditions affect the incidence of infectious diseases. Ultraviolet A (UVA) radiation induces release of cutaneous photolabile nitric oxide (NO) impacting the cardiovascular system and metabolic syndrome, COVID-19 risk factors. NO also inhibits the replication of SARS-CoV. We therefore model the relationship between UVA radiation, derived from remote sensed data, and COVID-19 deaths for counties across the USA during their ‘UV vitamin D winter’ (Jan-April) adjusting for confounding including by temperature and humidity. The Mortality Risk Ratio (MRR) falls by 29% (40% -15% (95% CI)) per 100 (KJ/m2) increase in mean daily UVA. We replicate this in independent studies in Italy and England and estimate a pooled decline in MRR of 32% (48%-12%) per 100 KJ/m2 across the three studies.

scholarly journals Perceived managerial and leadership effectiveness in Mexico and the USA

2019 ◽  
Vol 43 (7/8) ◽  
pp. 601-618 ◽  
Author(s):  
Carlos Enrique Ruiz ◽  
Bob Hamlin
Keyword(s):  
Human Resource Development ◽  
Leadership Effectiveness ◽  
International Assignments ◽  
Content Type ◽  
Managerial Practices ◽  
Replication Studies ◽  
Development Professionals ◽  
Human Resource Development Professionals ◽  
The Usa ◽  
Practical Implications

Purpose The purpose of this study was to compare the perceptions of Mexican and US employees about effective and ineffective managerial behaviour. Design/methodology/approach A qualitative multiple cross-case comparative analysis of findings obtained from two past emic replication studies of observed effective and ineffective managerial behaviour carried out in Mexico and the USA respectively was conducted. Findings Notwithstanding the significant cultural variances between Mexico and the USA underlined by various cross-cultural studies, the findings suggest that Mexican and US employees perceive effective and ineffective managerial behaviour in a very similar manner. Research limitations/implications While the results of the study suggest that culture may not play a significant role in the way people perceive managerial and leadership effectiveness, the authors suggest that more replication studies with larger and more balanced gender samples using different methods need to be performed in both countries. Practical implications The findings of the study may be relevant for human resource development professionals in both countries when providing training to expatriates for international assignments. Reinforcing the set of managerial practices that are perceived as effective in these two countries and emphasizing those practices that may be particular to Mexico and the USA respectively, could lead to an improvement in the performance of Mexican executives managing in the USA and US executives managing in Mexico. Originality/value This paper compares managerial behavioural effectiveness between Mexico and the USA.

Holding replication studies to mainstream standards of evidence

2018 ◽  
Vol 41 ◽  
Author(s):  
Duane T. Wegener ◽  
Leandre R. Fabrigar
Keyword(s):  
Replication Studies ◽  
Replication Research ◽  
Standards Of Evidence ◽  
Do So

AbstractReplications can make theoretical contributions, but are unlikely to do so if their findings are open to multiple interpretations (especially violations of psychometric invariance). Thus, just as studies demonstrating novel effects are often expected to empirically evaluate competing explanations, replications should be held to similar standards. Unfortunately, this is rarely done, thereby undermining the value of replication research.

Ultrastructural changes in murine lymphoma cells exposed to ultraviolet-A radiation

1991 ◽  
Vol 49 ◽  
pp. 104-105
Author(s):  
Delma P. Thomas ◽  
Dianne E. Godar
Keyword(s):  
Medical Devices ◽  
Blood Cells ◽  
White Blood Cells ◽  
Consumer Products ◽  
Ultrastructural Changes ◽  
Ultraviolet A ◽  
Uv Spectrum ◽  
Lymphoma Cells ◽  
Murine Lymphoma ◽  
Transmission Electron

Ultraviolet radiation (UVR) from all three waveband regions of the UV spectrum, UVA (320-400 nm), UVB (290-320 nm), and UVC (200-290 nm), can be emitted by some medical devices and consumer products. Sunlamps can expose the blood to a considerable amount of UVR, particularly UVA and/or UVB. The percent transmission of each waveband through the epidermis to the dermis, which contains blood, increases in the order of increasing wavelength: UVC (10%) < UVB (20%) < UVA (30%). To investigate the effects of UVR on white blood cells, we chose transmission electron microscopy to examine the ultrastructure changes in L5178Y-R murine lymphoma cells.

Malignant melanoma after psoralen and ultraviolet A (PUVA) therapy

1998 ◽  
Vol 138 (6) ◽  
pp. 1100-1101 ◽  
Author(s):  
Wolf ◽  
SchOllnast ◽  
Hofer ◽  
Smolle ◽  
Kerl
Keyword(s):  
Malignant Melanoma ◽  
Puva Therapy ◽  
Ultraviolet A

The outcome of laparoscopic fundoplication for reflux disease in communlity practice in the USA

2001 ◽  
Vol 120 (5) ◽  
pp. A16-A16 ◽  
Author(s):  
N VAKIL ◽  
S TREML ◽  
M SHAW ◽  
R KIRBY
Keyword(s):  
Reflux Disease ◽  
Laparoscopic Fundoplication ◽  
The Usa
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