Seasonal dynamics of climatic indices as one of the manifestation factors of pyrogenic phenomena on the territory of Lugansk region

2014 ◽  
Vol 25 (1-2) ◽  
pp. 101-107
Author(s):  
I. A. Tarakhkalo
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Service Firms ◽  
Climatic Indices ◽  
Specific Influence

The analysis on the effects of pyrogenic Lugansk region for the period from 2001 to 2005 was conducted using the service «FIRMS». Established seasonal dynamics of pyrogenic phenomena and specific influence of climatic factors on the pyrogenic effects in the Luhansk region.

Incidence from coincidence: patterns of tick infestations on rodents facilitate transmission of tick-borne encephalitis virus

Parasitology ◽  
1999 ◽  
Vol 118 (2) ◽  
pp. 177-186 ◽  
Author(s):  
S. E. RANDOLPH ◽  
D. MIKLISOVÁ ◽  
J. LYSY ◽  
D. J. ROGERS ◽  
M. LABUDA
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Virus Transmission ◽  
Dermacentor Reticulatus ◽  
Reproductive Number ◽  
Seasonal Activity ◽  
Tick Borne Encephalitis ◽  
Tbe Virus ◽  
Tick Borne Encephalitis Virus ◽  
Systemic Infections

Tick-borne encephalitis (TBE) virus has a highly focal distribution through Eurasia. Endemic cycles appear to depend on the transmission of non-systemic infections between ticks co-feeding on the same rodent hosts. The particular features of seasonal dynamics and infestation patterns of larval and nymphal Ixodes ricinus, but not Dermacentor reticulatus, from 4 regions within TBE foci in Slovakia, are such as to promote TBE virus transmission. The distributions of larvae and nymphs on their principal rodent hosts are highly aggregated and, rather than being independent, the distributions of each stage are coincident so that the same ca. 20% of hosts feed about three-quarters of both larvae and nymphs. This results in twice the number of infectible larvae feeding alongside potentially infected nymphs compared with the null hypothesis of independent distributions. Overall, co-feeding transmission under these circumstances brings the reproductive number (R0) for TBE virus to a level that accounts quantitatively for maintained endemic cycles. Essential for coincident aggregated distributions of larvae and nymphs is their synchronous seasonal activity. Preliminary comparisons support the prediction of a greater degree of coincident seasonality within recorded TBE foci than outside. This identifies the particular climatic factors that permit such patterns of tick seasonal dynamics as the primary predictors for the focal distribution of TBE.

scholarly journals Basic Aspects of Seasonal Cardiovascular Mortality

2021 ◽  
Vol 17 (1) ◽  
pp. 92-98
Author(s):  
G. F. Andreeva ◽  
V. M. Gorbunov
Keyword(s):  
Cardiovascular Diseases ◽  
Cardiovascular Mortality ◽  
Seasonal Dynamics ◽  
Viral Infections ◽  
Climatic Factors ◽  
Cold Season ◽  
Winter Mortality ◽  
Seasonal Fluctuations ◽  
Weather Changes ◽  
Relationship Of

The review demonstrates the main aspects of seasonal cardiovascular mortality. Climatic factors, including seasonal weather changes, have a significant impact on the biosphere. People are also characterized by the seasonal dynamics of the activity of many organs and systems, biochemical parameters, and mortality. Cardiovascular mortality is also characterized by seasonal fluctuations: in winter it is maximum, in summer it is minimal. The same patterns are characteristic of mortality from cardiovascular diseases (myocardial infarction, stroke, cardiac arrhythmias, etc.). The article presents the basic patterns of seasonal cardiovascular mortality in various climatic zones, the cardiovascular mortality of countries located in the equatorial and subequatorial climatic region. In addition, the mortality displacement phenomenon, the paradox of winter mortality. The main trends in changes in cardiovascular mortality over a long period of time are demonstrated. The paper discusses some of the mechanisms that underlie the dynamics of cardiovascular mortality during the year: seasonal fluctuations in the level of vitamin D, lipids in the blood plasma, changes in hemodynamic parameters, the effects of microbial and viral infections in the cold season, etc. In addition, data on seasonal the dynamics of risk factors for cardiovascular diseases is considered: an increase in body weight, a physical activity decrease, a change in the nutrition structure in the winter, the seasonal dynamics of depression, anxiety, hostility, the relationship of seasonal cardiovascular mortality with socio-economic, demographic and other factors. In conclusion, the main ways of development and prevention of seasonal CV cardiovascular mortality M, taking into account modern technologies at the international level, for state health departments, for specific patients, are demonstrated.

scholarly journals ASSESSMENT OF THE SEASONAL DYNAMICS OF THE NORMALIZED DIFFERENTIAL VEGETATION INDEX (NDVI) AND ITS CORRELATION WITH CLIMATE PREDICTORS IN WETLANDS “LA TEMBLADERA” (ECUADOR)

Ekosistemy ◽  
2021 ◽  
pp. 5-11
Author(s):  
S. A. Llerena ◽  
A. I. Kurbatova
Keyword(s):  
Climate Change ◽  
Seasonal Dynamics ◽  
Rainy Season ◽  
Vegetation Index ◽  
Climatic Factors ◽  
Dry Season ◽  
Climatic Variables ◽  
Regulatory Function ◽  
Temperature And Precipitation ◽  
Dynamics Of Vegetation

Wetlands are considered critical ecosystems due to declining quality of their ecosystems services. Nevertheless, there have not been any climate related researched devoted to vegetation condition and biomass amount. Thus, this study examines the seasonal dynamics of vegetation and its correlations with climatic factors. This study is important for understanding of the regulatory function of this ecosystem during climate change. Two Landsat OLI8 images made in 2020 were analyzed. One image refers to the rainy season (April 12), and the other to the dry season (August 2). The radiometric and atmospheric corrections of the images and the determination of the boundaries of the study site (ROI) were developed in ENVI 5.3 program. The normalized differential vegetation index (NDVI) was calculated with ENVI 5.3 program (histograms allowed to determine biomass), and with ArcGIS 10.3 (for classification index). The Pearson coefficient (r) and the Statistica software were applied to determine the correlations between the variables. The linear relationship between the NDVI, the amount of biomass and the climatic variables was identified. In the rainy season (April) with higher temperature and precipitation, the NDVI was >0.5 and the biomass was 372613.0 t in the major part of “la Tembladera”, while in the dry season (August) with a lower temperature and precipitation rate, both the NDVI (0.14–0.5) and the biomass (333856.95 t) decreased in a considerable area of the wetland. Consequently, the seasonal dynamics of vegetation and its biomass is caused by fluctuations in these climatic variables. Thus, the biomass increased during the rainy season (higher precipitation, temperature, and humidity). These results can be used to further modelling the effects of climate change in these ecosystems.

Influence of Climatic Factors on Interannual and Seasonal Dynamics of the Environmental State of the Salt Lake Adzhi-Baichi (Crimea)

2021 ◽  
Vol 11 (4) ◽  
pp. 434-442
Author(s):  
I. I. Rudneva ◽  
V. G. Shaida ◽  
A. V. Shcherba ◽  
A. V. Zavyalov
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Salt Lake

scholarly journals Seasonal Dynamics of Photochemical Performance of PS II of Terrestrial Mosses from Different Elevations

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2613
Author(s):  
Jiewei Hao ◽  
Xueyan Xu ◽  
Lina Zhang
Keyword(s):  
Relative Humidity ◽  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Assimilation Efficiency ◽  
Dew Point ◽  
Ps Ii ◽  
Moss Species ◽  
Tropical Regions ◽  
Weather Stations ◽  
Terrestrial Mosses

Mosses are critical components of tropical forest ecosystems and have multiple essential ecological functions. The drying and rehydrating and often hot environments in tropical regions present some of the greatest challenges for their photosynthetic activities. There is limited knowledge available on the physiological responses to the changing environments such as temperature and water pattern changes for terrestrial mosses. We examined the seasonal dynamics of photochemical performance of PS II through the measuring of chlorophyll fluorescence of 12 terrestrial mosses in situ from five different elevations by Photosynthesis Yield Analyzer MINI-PAM-II, along with the seasonal changes of climatic factors (air temperature, dew point, relative humidity and rainfall), which were collected by local weather stations and self-deployed mini weather stations. The results showed a great seasonality during observing periods, which, mainly the changes of rainfall and relative humidity pattern, presented significant impacts on the photochemical performance of PS II of terrestrial mosses. All these tested moss species developed a suitable regulated and non-regulated strategy to avoid the detrimental effect of abiotic stresses. We found that only Hypnum plumaeforme, Pterobryopsis crassicaulis and Pogonatum inflexum were well adapted to the changes of habitat temperature and water patterns, even though they still experienced a lower CO2 assimilation efficiency in the drier months. The other nine species were susceptible to seasonality, especially during the months of lower rainfall and relative humidity when moss species were under physiologically reduced PS II efficiency. Anomobryum julaceum, Pogonatum neesii, Sematophyllum subhumile, Pseudotaxiphyllum pohliaecarpum and Leucobryum boninense, and especially Brachythecium buchananii, were sensitive to the changes of water patterns, which enable them as ideal ecological indicators of photosynthetic acclimation to stressed environments as a result of climate change.

Immigration and the tech industry: As a labour shortage remedy, for innovation, or for cost savings?

2013 ◽  
Vol 10 (2) ◽  
pp. 201-227 ◽  
Author(s):  
Norman Matloff
Keyword(s):  
Immigration Policy ◽  
Brain Drain ◽  
Cost Savings ◽  
Foreign Workers ◽  
Service Firms ◽  
It Service ◽  
Labour Shortage ◽  
Labour Costs ◽  
Using Data ◽  
The U.S

The two main reasons cited by the U.S. tech industry for hiring foreign workers--remedying labour shortages and hiring "the best and the brightest"--are investigated, using data on wages, patents, and R&D work, as well as previous research and industry statements. The analysis shows that the claims of shortage and outstanding talent are not supported by the data, even after excluding the Indian IT service firms. Instead, it is shown that the primary goals of employers in hiring  foreign workers are to reduce labour costs and to obtain "indentured" employees. Current immigration policy is causing an ‘Internal Brain Drain’ in STEM.

EPIDEMIOLOGY, ECOLOGY AND PREVALENCE OF SOIL TRANSMITTED HELMINTHS FROM KOSHI REGION OF NORTH BIHAR.

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
LAKSHMI CHOUDHARY ◽  
PRABHAWATI PRABHAWATI
Keyword(s):  
Relative Humidity ◽  
Ascaris Lumbricoides ◽  
Rainy Season ◽  
Climatic Factors ◽  
Trichuris Trichiura ◽  
Hookworm Infection ◽  
Soil Transmitted Helminths ◽  
High Incidence ◽  
Apparently Healthy

Prevalence of soil transmitted helminthes infections in apparently healthy school going children and other 528 people of different districts of Koshi regions of North Bihar were evaluated. Over all incidences of STHs infection was 39.39% during study. High incidence of STH was seen in the rainy season i.e., in the month of July and August, September, significantly higher (P<0.05) .The incidence of Ascaris lumbricoides was highest in the month of August (18.64%). The month of September was 15.25% followed by that of July (14.4%) and October with 10.16%. Also the incidence of hookworm registered the highest incidence in the month of June (19.27%) and lowest in the month of December (4.82%) during the study period. However prevalence of Trichuris trichiura was negligible and it was almost nil in the most of the months but was highest in month of September with 28.57% and lowest in October with 14.00% The climatic factors are responsible for soil transmitted helminthes which are temperature, rainfall and relative humidity. Ascariasis, Trichuriasis and Ancyclostomiasis (Hookworm infection) are found to be endemic in this region.

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