scholarly journals Cyclical climate oscillation alters species statistical relationships with local habitat

2019 ◽  
Vol 614 ◽  
pp. 159-171 ◽  
Author(s):  
SM Roberts ◽  
AM Boustany ◽  
PN Halpin ◽  
RR Rykaczewski
Keyword(s):  
Climate Oscillation ◽  
Statistical Relationships ◽  
Local Habitat

Contribuição dos atores da pesca para a bioecologia do Camurim Centropomus undecimalis (CENTROPOMIDAE – PERCIFORMES) capturado no litoral Amazônico brasileiro

2020 ◽  
Vol 9 (10) ◽  
pp. e4119108691
Author(s):  
Maria Eduarda Garcia de Sousa Pereira ◽  
Voyner Ravena Cañete ◽  
Marllen Karine da Silva Palheta ◽  
Francisco José da Silva Santos ◽  
Bianca Bentes da Silva ◽  
...  
Keyword(s):  
Centropomus Undecimalis ◽  
Microsoft Office ◽  
Local Habitat

O objetivo deste trabalho foi conhecer e descrever a bioecologia do Centropomus undecimalis (Bloch, 1792), quanto a sua nomenclatura local, hábitat, alimentação, reprodução e migração, a partir do conhecimento dos atores da pesca, bem como, traçar o perfil socioeconômico desses trabalhadores. Os dados foram obtidos por meio de entrevistas semiestruturadas junto aos pescadores, mestres e donos de embarcações, entre março e maio de 2019 no município de Bragança, por meio da técnica snowball. Os dados foram tabulados e analisados em planilhas eletrônicas dos Software Microsoft Office Excel, Past e IRAMUTEQ. O perfil socioeconômico dos atores da pesca foi similar em relação a idade, escolaridade, tempo na pesca e renda, exceto o último, que variou significativamente em função da ocupação/profissão. Essa espécie é conhecida localmente como camurim, robalo e camurim-preto. Sendo encontrado ao longo do litoral amazônico brasileiro, distribuído em 20 etno-habitats. Destes, 49,1% encontram-se no ambiente costeiro/marinho, 47,1% no estuarino e 3,8% no dulcícola. Alimentam-se, preferencialmente de peixes, seguido de crustáceos e insetos. Essa espécie reproduz ao longo do ano, porém, com maior frequência entre os meses de junho e dezembro (período de transição chuvoso-seco e período seco). A migração ocorre em função da sazonalidade local, fase de vida e habitat, influenciando na alimentação, reprodução e crescimento. Os resultados apresentados, a partir de uma perspectiva integrada de conhecimentos, pode ser peça chave no ponto de partida para o manejo e conservação dessa espécie no litoral amazônico brasileiro.

Use of Ornamental Trees in Dating of Abandoned Cemeteries on the Example of Thuja Occidentalis and Thuja Orientalis

2012 ◽  
Vol 1 (1) ◽  
pp. 45-50
Author(s):  
Magdalena Opała ◽  
Leszek Majgier
Keyword(s):  
Climatic Conditions ◽  
The Other ◽  
Lake District ◽  
Thuja Occidentalis ◽  
North Eastern ◽  
The 1960S ◽  
Thuja Orientalis ◽  
Ornamental Trees ◽  
Common Tree ◽  
Local Habitat

Abstract Due to the lack of maintenance, abandoned cemeteries are often incorporated into the landscape. In many cases the information about the age of the cemetery is unavailable. To find out the approximate time of the formation of the cemetery the information recorded in the annual tree and shrub rings can be used. One of the most common tree species, planted for ornamental and symbolic purposes on the cemeteries, are Thuja orientalis and Thuja occidentalis. Alien to the Polish flora, these species adapted well to the local habitat and climatic conditions. The paper presents an attempt to apply dendrochronological dating to determine the age of the abandoned cemeteries in the region of the Great Masurian Lakes, part of the Masurian Lake District (north-eastern Poland). The study included five abandoned cemeteries. In total, 15 cores were taken from the trees. After applying the standard dendrochronological method, local chronologies for the studied species were established. The research indicated that the oldest found specimens - over 70 yrs old - are Thuja occidentalis individuals growing at the Słabowo cemetery. At the other sites the specimens of both Thuja species date back to the 1960s and early 1970s. Compared to the historical information regarding the age and origin of the studied objects, thujas growing there are much younger than the age of the cemeteries foundation. The presented method proved to be very helpful in understanding the time of Thuja occidentalis and Thuja orientalis introduction at the investigated cemeteries.

Evaluation of the Degree of Dental Anxiety in a Lot of Patients Altered in Young Adults

2019 ◽  
Vol 70 (2) ◽  
pp. 689-692
Author(s):  
Gheorghe Raftu ◽  
Elena-Claudia Sin ◽  
Aureliana Caraiane ◽  
Steliana Gabriela Bustiuc ◽  
Raluca Briceag
Keyword(s):  
Young Adults ◽  
Oral Cavity ◽  
Dental Treatment ◽  
Economic Status ◽  
Dental Anxiety ◽  
Background Level ◽  
Anxiety Scale ◽  
Statistical Relationships ◽  
And Gender ◽  
Age Range

The study aims at identifying and highlighting dental anxiety in a group of young adults, analyzing patients� concerns about the main dental treatment procedures, and establishing statistical relationships between anxiety and gender, the background, level of education, socio-economic status and knowledge of habits of care and hygiene of oral cavity characteristic of the studied group. The study group consists of 150 female (50%) and male (50%) patients , aged between 20 and 40 years. The inclusion criteria in the batch were those related to the age range of 20 to 40 years.Two respondents (Corah�s Dental Anxiety Scale, Revised (DAS-R)) were given two questionnaires ( Corah�s Dental Anxiety Scale, DAS-R), and the second questionnaire contained 7 questions about the habits dental care). Most patients� concerns about the main procedures of dental treatment / other concerns are: dental extraction, material expenses, possibility of treatments and shame she felt oppressed health of the oral cavity. Regardless of the level of dental anxiety, the oral cavity hygiene habits are not properly performed by patients, with an increased tendency for them to be disregarded by patients with severe dental anxiety.

scholarly journals Two-Dimensional Sampling-Recovery Algorithm of a Realization of Gaussian Processes on the Input and Output of Linear Systems

Entropy ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1079
Author(s):  
Vladimir Kazakov ◽  
Mauro A. Enciso ◽  
Francisco Mendoza
Keyword(s):  
Gaussian Processes ◽  
Research Method ◽  
General Algorithm ◽  
Two Dimensional ◽  
Recovery Algorithm ◽  
Conditional Mean ◽  
Quality Of Recovery ◽  
Input And Output ◽  
Statistical Relationships

Based on the application of the conditional mean rule, a sampling-recovery algorithm is studied for a Gaussian two-dimensional process. The components of such a process are the input and output processes of an arbitrary linear system, which are characterized by their statistical relationships. Realizations are sampled in both processes, and the number and location of samples in the general case are arbitrary for each component. As a result, general expressions are found that determine the optimal structure of the recovery devices, as well as evaluate the quality of recovery of each component of the two-dimensional process. The main feature of the obtained algorithm is that the realizations of both components or one of them is recovered based on two sets of samples related to the input and output processes. This means that the recovery involves not only its own samples of the restored realization, but also the samples of the realization of another component, statistically related to the first one. This type of general algorithm is characterized by a significantly improved recovery quality, as evidenced by the results of six non-trivial examples with different versions of the algorithms. The research method used and the proposed general algorithm for the reconstruction of multidimensional Gaussian processes have not been discussed in the literature.

Understory use by terrestrial small mammals in an unflooded forest patch in the Pantanal floodplain

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nayara Yoshie Sano ◽  
Heitor Miraglia Herrera ◽  
Grasiela Edith de Oliveira Porfirio ◽  
Filipe Martins Santos
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Understory Vegetation ◽  
Monodelphis Domestica ◽  
Forest Patch ◽  
Habitat Features ◽  
Species Characteristics ◽  
Local Habitat

AbstractTo date, there have been no studies that have evaluated small mammal utilization of the understory of forests. In this study, we described the use of vertical strata by small mammals in patches of unflooded forests, known as “cordilheiras”, in the Nhecolândia sub-region of the Pantanal, Brazil. We collected all species using the ground and understory, including the terrestrial didelphid Monodelphis domestica. We suppose that local habitat features (e.g., Acuri palms), rather than intrinsic species characteristics, may be more conducive to the use of understory vegetation by small mammals in the Nhecolândia region.

scholarly journals Evaluating the Effect of the Financial Status to the Mobility Customs

2021 ◽  
Vol 10 (5) ◽  
pp. 328
Author(s):  
Gergo Pintér ◽  
Imre Felde
Keyword(s):  
Socioeconomic Status ◽  
Economic Status ◽  
Housing Prices ◽  
Principal Component ◽  
Cellular Phone ◽  
Radius Of Gyration ◽  
Financial Status ◽  
Property Price ◽  
Statistical Relationships ◽  
Commuting Patterns

In this article, we explore the relationship between cellular phone data and housing prices in Budapest, Hungary. We determine mobility indicators from one months of Call Detail Records (CDR) data, while the property price data are used to characterize the socioeconomic status at the Capital of Hungary. First, we validated the proposed methodology by comparing the Home and Work locations estimation and the commuting patterns derived from the cellular network dataset with reports of the national mini census. We investigated the statistical relationships between mobile phone indicators, such as Radius of Gyration, the distance between Home and Work locations or the Entropy of visited cells, and measures of economic status based on housing prices. Our findings show that the mobility correlates significantly with the socioeconomic status. We performed Principal Component Analysis (PCA) on combined vectors of mobility indicators in order to characterize the dependence of mobility habits on socioeconomic status. The results of the PCA investigation showed remarkable correlation of housing prices and mobility customs.

scholarly journals Stochastic Uncertainty in a Dam-Break Experiment with Varying Gate Speeds

2021 ◽  
Vol 9 (1) ◽  
pp. 67
Author(s):  
Hiroshi Takagi ◽  
Fumitaka Furukawa
Keyword(s):  
High Speed ◽  
Pressure Sensors ◽  
Dam Break ◽  
Maximum Pressure ◽  
Vertical Acceleration ◽  
Ship Wakes ◽  
Dam Break Flow ◽  
Statistical Relationships ◽  
Flow Propagation ◽  
Impulsive Pressure

Uncertainties inherent in gate-opening speeds are rarely studied in dam-break flow experiments due to the laborious experimental procedures required. For the stochastic analysis of these mechanisms, this study involved 290 flow tests performed in a dam-break flume via varying gate speeds between 0.20 and 2.50 m/s; four pressure sensors embedded in the flume bed recorded high-frequency bottom pressures. The obtained data were processed to determine the statistical relationships between gate speed and maximum pressure. The correlations between them were found to be particularly significant at the sensors nearest to the gate (Ch1) and farthest from the gate (Ch4), with a Pearson’s coefficient r of 0.671 and −0.524, respectively. The interquartile range (IQR) suggests that the statistical variability of maximum pressure is the largest at Ch1 and smallest at Ch4. When the gate is opened faster, a higher pressure with greater uncertainty occurs near the gate. However, both the pressure magnitude and the uncertainty decrease as the dam-break flow propagates downstream. The maximum pressure appears within long-period surge-pressure phases; however, instances considered as statistical outliers appear within short and impulsive pressure phases. A few unique phenomena, which could cause significant bottom pressure variability, were also identified through visual analyses using high-speed camera images. For example, an explosive water jet increases the vertical acceleration immediately after the gate is lifted, thereby retarding dam-break flow propagation. Owing to the existence of sidewalls, two edge waves were generated, which behaved similarly to ship wakes, causing a strong horizontal mixture of the water flow.

scholarly journals Accounting for dispersal and local habitat when evaluating tributary use by riverine fishes

Ecosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
Author(s):  
Corey G. Dunn ◽  
Craig P. Paukert
Keyword(s):  
Local Habitat
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