scholarly journals Psoriasis and seasonal variation: A systematic review on reports from Northern and Central Europe—Little overall variation but distinctive subsets with improvement in summer or wintertime

2021 ◽  
Author(s):  
Kimie Kronberg Jensen ◽  
Jørgen Serup ◽  
Kasper Køhler Alsing
Keyword(s):  
Systematic Review ◽  
Seasonal Variation ◽  
Central Europe

scholarly journals Quasi-five- and ten-day oscillations in f0F2 and their possible connection with oscillations at lower ionospheric heights

1996 ◽  
Vol 39 (4) ◽  
Author(s):  
D. Altadill ◽  
J. Lastovicka
Keyword(s):  
Seasonal Variation ◽  
Statistical Analysis ◽  
Solar Cycle ◽  
Radio Wave ◽  
Central Europe ◽  
Lower Ionosphere ◽  
Relative Amplitude ◽  
Wave Absorption ◽  
Radio Wave Absorption ◽  
Degree Of Similarity

The statistical analysis of the 5-day and 10-day oscillations inferred in the upper and lower ionosphere in Central Europe from f0F2 measured in Pruhonice and the radio wave absorption in the lower ionosphere shows a remarkable degree of similarity for relative amplitudes of oscillations (not for absolute amplitudes). The relative amplitudes in both regions do not express a significant solar cycle effect and their seasonal variation is also similar except for winter. The typical relative amplitude of both 5- and 10-day oscillations in the F2-region is about 4%, which is useful information for PRIME.

scholarly journals Seasonal variability of measured ozone production efficiencies in the lower free troposphere of Central Europe

2007 ◽  
Vol 7 (1) ◽  
pp. 223-236 ◽  
Author(s):  
P. Zanis ◽  
A. Ganser ◽  
C. Zellweger ◽  
S. Henne ◽  
M. Steinbacher ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Central Europe ◽  
Seasonal Variability ◽  
Transition Period ◽  
Ozone Production ◽  
Data Series ◽  
Research Station ◽  
Monthly Means ◽  
Free Troposphere ◽  
Production Efficiencies

Abstract. In this study we present the seasonal variability of ozone production efficiencies (EN), defined as the net number of ozone molecules produced per molecule of nitrogen oxides (nitrogen oxide (NO) + nitrogen dioxide (NO2)=NOx) oxidized to NOz (total reactive nitrogen (NOy)–NOx) determined from field measurements of a seven-year period (1998–2004) at the Swiss high-alpine research station Jungfraujoch (JFJ), 3580 m a.s.l. This dataset is a unique long-term data series of nitrogen levels in the free troposphere over Central Europe and hence it offers an excellent opportunity to perform such an analysis and provide further evidence to the photochemical origin of the ozone spring maximum at locations of the northern hemisphere distant from nearby pollution sources. Experimentally derived daily EN values have been selected for 571 days out of the 2557 days from 1998 to 2004, from which an average ozone production efficiency of 18.8±1.3 molecules of O3 produced per molecule of NOx oxidized was calculated. This value indicates the great potential and importance of photochemical ozone production in the free troposphere. The monthly means of experimentally derived daily EN values show a seasonal variation with lower values from May to August, which can be probably attributed to more efficient vertical transport of polluted air masses from the atmospheric boundary layer up to JFJ. In agreement, theoretically derived monthly EN values show similar seasonal variation. The ratio NOy/CO, a parameter to assess the aging process that has occurred in an air parcel, was used as a criterion to disaggregate the 571 selected days between undisturbed and disturbed free tropospheric (FT). The monthly means of experimentally derived EN values for the undisturbed FT conditions show a distinct seasonal cycle with higher values in the cold season from November to April. The EN values for undisturbed FT conditions are particularly higher than the respective monthly EN values for disturbed FT conditions from February to October. It should be noted that the monthly EN values of March (EN=35.8) and April (EN=34.9) are among the highest values throughout the year for undisturbed FT conditions at JFJ. These results highlight the key and possibly the dominant role for photochemistry in the observed build-up of tropospheric ozone in the winter-spring transition period.

scholarly journals Seasonal variability of measured Ozone production efficiencies in the lower free troposphere of Central Europe

2006 ◽  
Vol 6 (5) ◽  
pp. 9315-9349 ◽  
Author(s):  
P. Zanis ◽  
A. Ganser ◽  
C. Zellweger ◽  
S. Henne ◽  
M. Steinbacher ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Central Europe ◽  
Seasonal Variability ◽  
Transition Period ◽  
Ozone Production ◽  
Data Series ◽  
Research Station ◽  
Monthly Means ◽  
Free Troposphere ◽  
Production Efficiencies

Abstract. In this study we present the seasonal variability of ozone production efficiencies (EN), defined as the net number of ozone molecules produced per molecule of nitrogen oxides (nitrogen oxide (NO) + nitrogen dioxide (NO2)=NOx) oxidized to NOz (total reactive nitrogen (NOy)-NOx) for a seven-year period (1998–2004) at the Swiss high-alpine research station Jungfraujoch (JFJ), 3580 m a.s.l. This dataset is a unique long-term data series of nitrogen levels in the free troposphere over Central Europe and hence it offers an excellent opportunity to perform such an analysis and provide further evidence to the photochemical origin of the ozone spring maximum at locations of the northern hemisphere distant from nearby pollution sources. Experimentally derived daily EN values have been selected for 571 days out of the 2557 days from 1998 to 2004, from which an average ozone production efficiency of 18.8±1.3 molecules of O3 produced per molecule of NOx oxidized was calculated. This value indicates the great potential and importance of photochemical ozone production in the free troposphere. The monthly means of experimentally derived daily EN values show a seasonal variation with lower values from May to August, which can be probably attributed to more efficient vertical transport of polluted air masses from the atmospheric boundary layer up to JFJ. In agreement, theoretically derived monthly EN values show similar seasonal variation. The ratio NOy/CO, a parameter to assess the aging process that has occurred in an air parcel, was used as a criterion to disaggregate the 571 selected days between undisturbed and disturbed free tropospheric (FT). The monthly means of experimentally derived EN values for the undisturbed FT conditions show a distinct seasonal cycle with higher values in the cold season from November to April. The EN values for undisturbed FT conditions are particularly higher than the respective monthly EN values for disturbed FT conditions from February to October. It should be noted that the monthly EN values of March (EN=35.8) and April (EN=34.9) are among the highest values throughout the year for undisturbed FT conditions at JFJ. These results highlight the key and possibly the dominant role for photochemistry in the observed build-up of tropospheric ozone in the winter-spring transition period.

scholarly journals Factors determining local and seasonal variation in abundance of Harmonia axyridis (Coleoptera: Coccinellidae) in Central Europe

2019 ◽  
Vol 116 ◽  
pp. 93-103 ◽  
Author(s):  
Alois HONEK ◽  
Marek BRABEC ◽  
Zdenka MARTINKOVA ◽  
Anthony F.G. DIXON ◽  
Stano PEKAR ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Central Europe ◽  
Harmonia Axyridis

scholarly journals Seasonal Variation Effects on Perforated Peptic Ulcer - A systematic Review

2021 ◽  
Author(s):  
Ihab Jaradat ◽  
Sarah Al Sharie ◽  
Raed Ennab ◽  
Sohaib Al-Omari
Keyword(s):  
Systematic Review ◽  
Peptic Ulcer ◽  
Seasonal Variation ◽  
Perforated Peptic Ulcer

The effects of low-ratio n-6/n-3 PUFA on biomarkers of inflammation: a systematic review and meta-analysis

2021 ◽  
Author(s):  
Yali Wei ◽  
Yan Meng ◽  
Na Li ◽  
Qian Wang ◽  
Liyong Chen
Keyword(s):  
Systematic Review ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acid ◽  
Meta Analysis ◽  
Chain Polyunsaturated Fatty Acid ◽  
Inflammation Markers ◽  
Pufa Supplementation ◽  
Long Chain

The purpose of the systematic review and meta-analysis was to determine if low-ratio n-6/n-3 long-chain polyunsaturated fatty acid (PUFA) supplementation affects serum inflammation markers based on current studies.

Parent Education in Studies With Nonverbal and Minimally Verbal Participants With Autism Spectrum Disorder: A Systematic Review

2020 ◽  
Vol 29 (2) ◽  
pp. 890-902
Author(s):  
Lynn Kern Koegel ◽  
Katherine M. Bryan ◽  
Pumpki Lei Su ◽  
Mohini Vaidya ◽  
Stephen Camarata
Keyword(s):  
Systematic Review ◽  
Autism Spectrum Disorder ◽  
Parent Education ◽  
Autism Spectrum ◽  
Verbal Communication ◽  
Fidelity Of Implementation ◽  
Spectrum Disorder ◽  
Education Programs ◽  
Minimally Verbal ◽  
Parent Education Programs

Purpose The purpose of this systematic review was to identify parent education procedures implemented in intervention studies focused on expressive verbal communication for nonverbal (NV) or minimally verbal (MV) children with autism spectrum disorder (ASD). Parent education has been shown to be an essential component in the habilitation of individuals with ASD. Parents of individuals with ASD who are NV or MV may particularly benefit from parent education in order to provide opportunities for communication and to support their children across the life span. Method ProQuest databases were searched between the years of 1960 and 2018 to identify articles that targeted verbal communication in MV and NV individuals with ASD. A total of 1,231 were evaluated to assess whether parent education was implemented. We found 36 studies that included a parent education component. These were reviewed with regard to (a) the number of participants and participants' ages, (b) the parent education program provided, (c) the format of the parent education, (d) the duration of the parent education, (e) the measurement of parent education, and (f) the parent fidelity of implementation scores. Results The results of this analysis showed that very few studies have included a parent education component, descriptions of the parent education programs are unclear in most studies, and few studies have scored the parents' implementation of the intervention. Conclusions Currently, there is great variability in parent education programs in regard to participant age, hours provided, fidelity of implementation, format of parent education, and type of treatment used. Suggestions are made to provide both a more comprehensive description and consistent measurement of parent education programs.

Sign in / Sign up

Export Citation Format

Share Document