The blackflies (Diptera: Simuliidae) of insular Newfoundland. III. Factors affecting the distribution and migration of larval simuliids in small streams on the Avalon Peninsula

1975 ◽  
Vol 53 (2) ◽  
pp. 114-123 ◽  
Author(s):  
David J. Lewis ◽  
Gordon F. Bennett
Keyword(s):  
Population Dynamics ◽  
Chemical Composition ◽  
Water Depth ◽  
Current Velocity ◽  
Substrate Type ◽  
Factors Affecting ◽  
Small Streams ◽  
And Migration ◽  
Avalon Peninsula ◽  
Significant Factors

Factors affecting the population dynamics, distribution, and migration of nine species of simuliid larvae in a complex of small streams on the Avalon Peninsula, Newfoundland, were studied. The most significant factors affecting the distribution and migration of simuliid larvae were current velocity, substrate type, and water depth; temperature, light, chemical composition of the water, and parasites were found to be of little or no significance.

scholarly journals Komunitas Krustasea di Kawasan Mangrove Desa Jangkaran Kabupaten Kulon Progo

2017 ◽  
Vol 19 (2) ◽  
pp. 79
Author(s):  
Sholihat Amalia ◽  
Djumanto Djumanto ◽  
Namastra Probosunu
Keyword(s):  
Water Depth ◽  
Current Velocity ◽  
Dominant Species ◽  
Carapace Length ◽  
White Shrimp ◽  
Substrate Type ◽  
Mangrove Area ◽  
The Family ◽  
Uca Annulipes ◽  
Penaeus Merguiensis

The objective of this study was to determine the diversity and abundance of krustaseans in the mangrove area of Jangkaran Village, Temon District, Kulon Progo Regency. Sampling was done bi-weekly from October 2016 to February 2017 on six stations defined by ecological character. Krustasean sampling was done using cest net, trap net and hand picking along the river with the extent of each collection station about 10 m2. The captured krustasean samples were cleaned, stored in ice-cooled boxes and transported to the laboratories to be identified and grouped according to species, then measured by carapace length and individual weight. Observation of aquatic environment was done by measuring temperature, brightness, water depth, current velocity, pH, salinity, dissolved oxygen, and substrate type. The results of the observation obtained 1 order, 7 families, and 26 species. The family krustaseans found were Coenobitidae, Diogenidae, Grapsidae, Ocypodidae, Palaemonoidae, Penaeidae, and Portunidae. The most dominant species of krustaseans were white shrimp (Penaeus merguiensis) as much as 25.06%, hermit crab (Clibanarius sp.) as much as 10.85%, and Uca annulipes as much as 10.59%. The fewest species of krustaseans found were Varuna yui of 0.13% and Ocypode sp. as much as 0.26%. The abundance value was 25.4 ind / m2, indices of diversity 2.60, richess index 0.87 and index of dominance 0.18.

scholarly journals A Habitat Preference Analysis of the Virgin Spinedace in Zion National Park

1988 ◽  
Vol 12 ◽  
pp. 199-202
Author(s):  
James Deacon ◽  
Anga Rebane
Keyword(s):  
Water Depth ◽  
Current Velocity ◽  
Habitat Preference ◽  
National Park ◽  
Substrate Type ◽  
Water Conductivity ◽  
Preference Analysis ◽  
Zion National Park ◽  
Suitability Index ◽  
Habitat Parameters

Distribution, abundance, and habitat utilization of the Virgin Spinedace, Lepidomeda mollispinis nnllispinis, is being studied at 12 stations in and near Zion National Park, Utah, and one at Lytle Ranch, Utah. Fish are being collected by seining and electroshocking, and associated habitat parameters of water depth, current velocity, substrate type, cover, and water conductivity are being measured. Suitability index curves for spinedace are being developed for depth, substrate, and current velocity.

Simulation of non-stationary thermal fields from a buried thermally insulated pipeline and its diagnostics

2007 ◽  
Vol 5 ◽  
pp. 127-132
Author(s):  
N.A. Vaganova
Keyword(s):  
Thermal Imaging ◽  
Software Package ◽  
Clay Soil ◽  
Underground Pipeline ◽  
Main Pipeline ◽  
Factors Affecting ◽  
Thermal Fields ◽  
Thermal Imaging Equipment ◽  
Principal Possibility ◽  
Significant Factors

To detect damage to the underground pipeline, a mathematical model, allowing to take into account the most significant Factors affecting the distribution of temperature on the day surface. To implement this model, a software package has been developed and results of numerical calculations. With the help of these calculations, in particular, It is established that modern thermal imaging equipment has a principal possibility to determine an unauthorized frame in the main pipeline at a depth of two meters in clay soil.

scholarly journals The Level of Conus Medullaris in 629 Healthy Japanese Individuals

2021 ◽  
Vol 10 (14) ◽  
pp. 3182
Author(s):  
Hiroaki Nakashima ◽  
Keigo Ito ◽  
Yoshito Katayama ◽  
Mikito Tsushima ◽  
Kei Ando ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Magnetic Resonance ◽  
Pelvic Tilt ◽  
Pelvic Incidence ◽  
Multivariate Regression Analysis ◽  
Conus Medullaris ◽  
Magnetic Resonance Images ◽  
Factors Affecting ◽  
Adult Volunteers ◽  
Significant Factors

The conus medullaris typically terminates at the L1 level; however, variations in its level and the factors associated with the conus medullaris level are unclear. We investigated the level of conus medullaris on magnetic resonance imaging in healthy volunteers. In total, 629 healthy adult volunteers (≥50 individuals of each sex and in each decade of age from 20 to 70) were enrolled. The level of the conus medullaris was assessed based on the T2-weighted sagittal magnetic resonance images, and factors affecting its level were investigated employing multivariate regression analysis including the participants’ background and radiographical parameters. L1 was the most common conus medullaris level. Participant height was significantly shorter in the caudally placed conus medullaris (p = 0.013). With respect to the radiographical parameters, pelvic incidence (p = 0.003), and pelvic tilt (p = 0.03) were significantly smaller in participants with a caudally placed conus medullaris. Multiple regression analysis showed that the pelvic incidence (p < 0.0001) and height (p < 0.0001) were significant factors affecting the conus medullaris level. These results indicated that the length of the spinal cord varies little among individuals and that skeletal differences affect the level of the conus medullaris.

scholarly journals Environmental factors affecting the wintering raptor community in Armenia, Southern Caucasus

2021 ◽  
Author(s):  
Gianpasquale Chiatante ◽  
Michele Panuccio
Keyword(s):  
General Pattern ◽  
Abundant Species ◽  
Theoretic Approach ◽  
Factors Affecting ◽  
Milvus Migrans ◽  
Gyps Fulvus ◽  
Black Kite ◽  
Southern Caucasus ◽  
And Migration ◽  
Information Theoretic Approach

AbstractThe species–habitat relationships can change during the year because of the seasonality of resources. Therefore, the investigation of habitat use by animals in each season plays a fundamental role in their conservation. The main aim of this research was to investigate the raptor community that spends the winter in Armenia, southern Caucasus, and to explore its relationship with environmental features, such as land use and topography. During January 2012, we collected data by carrying out 15 roadside counts along which we calculated three community parameters: the relative abundance, the species richness, and the species diversity. Then, we carried out a multiple linear regression with the Information-Theoretic Approach, to explain the relationship between the parameters and environmental variables. Besides, we computed a Canonical Correspondence Analysis (CCA) between the species and the environment around their observations. As a general pattern, the community was associated with permanent crops, maybe because of their heterogeneity, which in turn allows them to support higher densities of prey during the winter. The most abundant species was the Black Kite (Milvus migrans), followed by the Common Kestrel (Falco tinnunculus) and the Griffon Vulture (Gyps fulvus). To our knowledge, this is one of the first studies investigating the wintering raptor community in the Caucasus, with raptors generally studied in this area during the breeding season and migration.

scholarly journals Factors Affecting Secondary Traumatic Stress of Nurses Caring for COVID-19 Patients in South Korea

2021 ◽  
Vol 18 (13) ◽  
pp. 6843
Author(s):  
Mee Sun Lee ◽  
Sujin Shin ◽  
Eunmin Hong
Keyword(s):  
Social Support ◽  
Regression Analysis ◽  
Traumatic Stress ◽  
Secondary Traumatic Stress ◽  
Direct Care ◽  
Hierarchical Regression ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Affect Patient Care ◽  
Significant Factors

The secondary traumatic stress (STS) of nurses caring for COVID-19 patients is expected to be high, and it can adversely affect patient care. The purpose of this study was to examine the degree of STS of nurses caring for COVID-19 patients, and we identified various factors that influence STS. This study followed a descriptive design. The data of 136 nurses who had provided direct care to COVID-19 patients from 5 September to 26 September 2020 were collected online. Hierarchical regression analysis was conducted to identify the factors influencing STS. Participants experienced moderate levels of STS. The regression model of Model 1 was statistically significant (F = 6.21, p < 0.001), and the significant factors influencing STS were the duration of care for patients with COVID-19 for more than 30 days (β = 0.28, p < 0.001) and working in an undesignated COVID-19 hospital (β = 0.21, p = 0.038). In Model 2, the factor influencing STS was the support of a friend in the category of social support (β = −0.21, p = 0.039). The nurses caring for COVID-19 patients are experiencing a persistent and moderate level of STS. This study can be used as basic data to treat and prevent STS.

scholarly journals Seasonality of Hypoplastic Left Heart Syndrome and Single Ventricle Heart in Poland in the Context of Air Pollution

2021 ◽  
Vol 10 (15) ◽  
pp. 3207
Author(s):  
Iwona Strzelecka ◽  
Małgorzata Biedrzycka ◽  
Filip Franciszek Karuga ◽  
Bartosz Szmyd ◽  
Katarzyna Batarowicz ◽  
...  
Keyword(s):  
Hypoplastic Left Heart Syndrome ◽  
Single Ventricle ◽  
Single Case ◽  
Winter Season ◽  
Left Heart ◽  
Target Level ◽  
Hypoplastic Left Heart ◽  
Factors Affecting ◽  
Left Heart Syndrome ◽  
Significant Factors

Hypoplastic left heart syndrome (HLHS) and single ventricle (SV) remain a significant cause of cardiac deaths occurring in the first week of life. Their pathogenesis and seasonal frequency are still unknown. Therefore, we attempt to look at the genesis of the HLHS and SV in the context of territorial distribution as well as seasonality. A total of 193 fetuses diagnosed with HLHS and 92 with SV were selected. The frequency was analyzed depending on the year, calendar month, quarter and season (fall-winter vs. spring-summer). The spatial distribution of HLHS and SV in Poland was analyzed. We observed a statistically significant overrepresentation of HLHS formation frequency in March: 27 (14.00%) in comparison to a monthly median of 15 (IQR: 13.75–16.25; p = 0.039), as well as a significantly higher frequency of HLHS in 2007−2009: 65 cases (33.68%) in comparison to the annual mean of 13.79 ± 6.36 (p < 0.001). We noted a higher frequency of SV among parous with the last menstrual period reported in the fall/winter season of 58 vs. 34 in the spring/summer season (p = 0.014). The performed analysis also revealed significant SV overrepresentation in 2008: 11 cases (12.00%) in comparison to the annual mean of 6.57 ± 2.71 (p = 0.016). Every single case of HLHS was observed when the concentration of benzo(a)pyrene and/or PM10 exceeded the acceptable/target level. Our research indicates that both the season and the level of pollution are significant factors affecting the health of parous women and their offspring. The reason why HLHS and SV develop more frequently at certain times of the year remains unclear, therefore research on this topic should be continued, as well as on the effects of PM10 and benzo(a)pyrene exposure.

Population dynamics of priority geostrategic Territories of Russia in 2010-2018

2021 ◽  
Vol 12 (2) ◽  
pp. 123-142
Author(s):  
Valery V. Patsiorkovsky ◽  
Yury A. Simagin ◽  
Djamila J. Murtuzalieva
Keyword(s):  
Economic Development ◽  
Population Dynamics ◽  
Russian Federation ◽  
Far East ◽  
The Arctic ◽  
Natural Growth ◽  
North Caucasus ◽  
Socio Economic Development ◽  
The Russian Federation ◽  
And Migration

The article presents an analysis of the dynamics of the population of the priority geostrategic territories of the Russian Federation. They are highlighted in the "Strategy for the Spatial Development of the Russian Federation until 2025" as territories that are of particular importance for the development of the country as a whole and are distinguished at the same time by special life conditions and the functioning of the economy due to their geographical location. Population dynamics for such territories is both a factor determining socio-economic development and an indicator of the effectiveness of this development. The components of the population dynamics - natural growth and migration flows - are of particular importance. The article describes all four groups of priority geostrategic territories of Russia - isolated from the main territory of the country (exclaves), located in the North Caucasus and the Far East, in the Arctic zone of the Russian Federation. For each group, trends in population dynamics have been identified since the 2010 census, taking into account the components of natural growth and migration. The multidirectional aspect of the main demographic processes in the priority geostrategic territories of the country is revealed - natural growth is combined with the migration outflow of the population, and the migration inflow - with natural decline. At the same time, in the exclave and North Caucasian territories, the population is growing, and in the Far Eastern and Arctic territories it is decreasing. The features of both groups of priority geostrategic territories in comparison with Russia as a whole and of individual constituent entities of the Russian Federation and municipalities within groups of territories are shown. The latter became possible due to the use of the database "Municipal Russia", that summarises demographic statistics for all urban districts and municipal areas of the country, including those located in priority geostrategic territories. As a result of the analysis of the population dynamics, directions have been identified that can lead to an improvement in the demographic situation in the priority geostrategic territories of the country, and, accordingly, will contribute to the socio-economic development of not only these territories, but the entire Russian Federation

Assessment of the significance of factors affecting the growth of women entrepreneurs: study based on experience categorization

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sucheta Agarwal ◽  
Veland Ramadani ◽  
Leo-Paul Dana ◽  
Vivek Agrawal ◽  
Jitendra Kumar Dixit
Keyword(s):  
Emerging Economies ◽  
Women Entrepreneurs ◽  
Uttar Pradesh ◽  
Sustainable Growth ◽  
Gender Orientation ◽  
Content Type ◽  
Factors Affecting ◽  
Emerging Nations ◽  
Practical Implications ◽  
Significant Factors

Purpose The ascent of women enterprising community (WEC) in a couple of decades draws the attention of various government and non-government bodies. Literature has mentioned various studies that focus on the factors affecting the success or failure of women entrepreneurs (WEs), but understanding of the ranking of the factors depending on the experiences of different WEs is needed. This study aims to identify the significant factors essential for the growth of WEC. Design/methodology/approach This study examines the factors through interview of 33 WEs having different entrepreneurial experiences (less than 1 year, more than 1 year but less than 10 years and more than 10 years of experiences) from different regions of Uttar Pradesh, India, and with the help of analytical hierarchical process, ranks the factors affecting the sustainable growth of WEs. Findings Through analysis, significant factors have been identified such as determination, education, entrepreneurial resilience, personal satisfaction and provide employment, and these factors have been analysed according to the different experiences of WEs. An investigation of ranking these factors of WEC, especially in the emerging nations, can assist policymakers in designing projects that improve the mindfulness associated with women enterprise and define the compelling methodologies. Practical implications The growth of the WEC is significantly affected by gender orientation ways of thinking as driven by entrepreneurship models. Originality/value This study gives a direction to policymakers by emphasizing on significant factors of various stages of enterprise development for the encouragement of WEs in the emerging economies.

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