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Some notes on the asymmetry of empirical distributions

100%

Wesolowska-Janczarek M.

Economic and Regional Studies

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2015

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tom 08

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nr 2

This paper discusses different aspects of asymmetry of empirical distributions. An attempt was made to clarify the definition of such distributions and to identify some of the problems associated with commonly used skewness coefficients of As and γ and their interpretation and those yet requiring further research.

2

Efficient order quantities and reorder levels for ringing stocks

100%

Underhill L. G., Fuelle H., Best C. C., Oatley T. B.

The Ring

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1994

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tom 16

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nr 1-2

3

Classical and order statistics of effective active time of felling at use chainsaw

86%

Glazar K., Bocianowski J.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2012

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tom 11

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nr 2

The time, within which accordingly to its application machine works, and an object of work and working groups are under load,is the effective active time. The purpose of the research was the classical and order statistics of effective active time of felling at use chainsaw. The average effective active time of felling of one tree was about 2 s. The cut trees were strong statistical diversified from the point of view of effective active time of felling. The positive skewness coefficient has confirmed, that statistical units with value of feature below arithmetic mean were prevailed – right-sided asymmetry.

4

Resources of the Polish official statistics for valuation of provisioning ecosystem services

86%

Stepniewska M.

Ekonomia i Środowisko

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2014

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nr 4[51]

5

Charakterystyka wojewodztwa podkarpackiego

86%

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1999

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nr 02

2-4

6

Statistical treatment of spatial variability in field trials

86%

Golaszewski J.

Natural Sciences

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2000

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tom 05

7

Score tests

86%

Catchpole E. A., Morgan B. J. T., Boucher M.

The Ring

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1997

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tom 19

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nr 1-2

8

Zużycie energii w światowym cukrownictwie buraczanym w świetle danych statystycznych

72%

Urbaniec K.

Gazeta Cukrownicza

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1989

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tom 97

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nr 03

9

The automotive picture of Poznan against a background of other cities and national indexes

72%

Kozak K., Kozak M., Merkisz J., Nijak D., Wisniewska B.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2012

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tom 12

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nr 1

10

Site parameters’ variance – a missing dimension in the studies of nest-site selection?

72%

Skorka P., Martyka R., Wojcik J. D., Lenda M.

Polish Journal of Ecology

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2011

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tom 59

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nr 2

In most studies of nest-site selection the data of habitat parameters are treated with analysis of variance. A basic assumption of this test is the homogeneity of variance. Here, we show that the nest-site selection process leads to lower variance of the selected parameters than in the case of random points which generally describe the available average characteristics of the environment. Thus, the variance should be accounted for in studies on nest-site selection and it should be treated not as a problem (as it is usually done), but as a source of additional important information on the selection process. Comparison only of mean values often does not lead to significant differences between nest site parameters and random points which may result from a small effect size (when animals select features similar to the general mean of available characteristics). Deeper insight into variance of the site parameters may elicit important results. We illustrate this issue with real data on nest site (islets and shores of water reservoirs) selection in the Common Gull Larus canus. Four (islet’s area, vegetation height on islets, vegetation cover on shore and distance to nearest shrub or tree on shore) from eight parameters were favored by the birds and, as predicted, their variance values were lower than of those not selected (vegetation cover on islets, distance of the islets to shoreline, vegetation height on shore and distance to water).

11

Wykorzystanie diagramu łodyga i liście do analizy danych w środowisku R

72%

Tartanus M., Kozak M., Wnuk A.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2011

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nr 259

12

Theoretical model explaining the relationship between the molecular mass and the activation energy of the enzyme revealed by a large-scale analysis of bioinformatics data

72%

Pawlowski P. H., Zielenkiewicz P.

Acta Biochimica Polonica

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2013

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tom 60

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nr 2

A general dependence of the enzyme catalytic rate on its mass was revealed when a statistical analysis of 17065 records from the EMP database was performed. The estimated activation energy of the catalytic process decreases asymptotically with the enzyme molecular mass increase. The proposed theoretical model postulates the existence of an intermediate complex of the enzyme and the departing product. It allows for the explanation of the discovered mass-energy relationship, as an effect of the global enzyme-product interactions during complex dissociation. Fitted parameters of the model seem to be in agreement with those widely accepted for the van der Waals energy of molecular interactions. Their values also agree with the picture of the hydrogen bonding in the catalytic process and suggest that surface walk can be the favorable way of the product departure.

13

Estimation of sorghum supply elasticity in South Africa

72%

Mojapelo M. C., Hlongwane J. J., Belete A.

Journal of Agribusiness and Rural Development

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2019

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nr 2[52]

14

Phytoplankton communities in ecological assessment of the Southern Bug River upper reaches (Ukraine)

72%

Bilous E., Barinova S., Klochenko P.

International Journal of Ecohydrology and Hydrobiology

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2012

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tom 12

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nr 3

15

Czy liczby mowia?..

72%

Marczak A.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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1995

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nr 06

19-20

16

The use of zooplankton distribution maps for assessment of ecological status of the Shardara reservoir (Southern Kazakhstan)

72%

Krupa E. G., Barinova S. S., Isbekov K. B., Assylbekova S. Z.

International Journal of Ecohydrology and Hydrobiology

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2018

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tom 18

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nr 1

17

The actual Far Eastern-Siberian-European floristic relationships [ vascular plants ]

72%

Charkiewicz Z.

Fragmenta Floristica et Geobotanica. Supplementum

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1993

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tom 02

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nr 1

18

Fuzzy function of accuracy of visual navigational observation

72%

Pyrchla J.

Polish Journal of Environmental Studies

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2005

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tom 14

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nr Suppl.1

The work presents results of interdisciplinary research aimed at determining the accuracy of visual navigational observation made at sea. It presents the fuzzy function describing the error made during visual navigational observation, worked out on the basis of analysis of experiment results. The values of variables in the function depend on factors affecting the observation result.

19

Models of relative abundance distributions II: Diversity and evenness statistics

72%

Ulrich W.

Polish Journal of Ecology

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2001

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tom 49

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nr 2

20

Coefficient of compatibility with the standard [CCS] and its application in cultivar research

72%

Jendrzejczak E.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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1999

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tom 02

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nr 2

The present paper concerns interactions between a set of objects, where the same components (fractions) can be isolated, and a standard object, which consists of arithmetical mean shares in these fractions. A method was proposed how to estimate the variability observed in the structure of a given object, as compared with the standard structure, as calculated with a coefficient of compatibility with the standard (CCS). According to the algorithm introduced, the coefficient value falls between ( 0.1). When the structure of a given object is identical with the one of the standard, the coefficient amounts to 0.5. If a growth in cumulative interest for respective fractions is more intensive as compared with the one of the standard, the coefficient amounts to less than 0.5, otherwise the coefficient is higher than 0.5. Applying the method presented, it was observed that the sowing material in the majority of pea cultivars, researched by the Centre for Cultivar Testing (COBORU) in 1995.

Ograniczanie wyników

Some notes on the asymmetry of empirical distributions

Efficient order quantities and reorder levels for ringing stocks

Classical and order statistics of effective active time of felling at use chainsaw

Resources of the Polish official statistics for valuation of provisioning ecosystem services

Charakterystyka wojewodztwa podkarpackiego

Statistical treatment of spatial variability in field trials

Score tests

Zużycie energii w światowym cukrownictwie buraczanym w świetle danych statystycznych

The automotive picture of Poznan against a background of other cities and national indexes

Site parameters’ variance – a missing dimension in the studies of nest-site selection?

Wykorzystanie diagramu łodyga i liście do analizy danych w środowisku R

Theoretical model explaining the relationship between the molecular mass and the activation energy of the enzyme revealed by a large-scale analysis of bioinformatics data

Estimation of sorghum supply elasticity in South Africa

Phytoplankton communities in ecological assessment of the Southern Bug River upper reaches (Ukraine)

Czy liczby mowia?..

The use of zooplankton distribution maps for assessment of ecological status of the Shardara reservoir (Southern Kazakhstan)

The actual Far Eastern-Siberian-European floristic relationships [ vascular plants ]

Fuzzy function of accuracy of visual navigational observation

Models of relative abundance distributions II: Diversity and evenness statistics

Coefficient of compatibility with the standard [CCS] and its application in cultivar research