2,700 research outputs found
Distribution of amphibians and reptiles in central Poland: 1980-2000
Based on 3047 records from 97 recorders distribution maps were drawn for the
amphibians and reptiles of central Poland (lirom 51°00’N to 52°15’N and from 18°20’E to
20°20’E). The study area was divided into 180 atlas fields based on the geographic grid. All
data were gathered in 1980-2000, most of them (67%) however, in 1995-2000. 13 taxa of
amphibians were found in 143 atlas fields and 6 species of reptiles were found in 121 atlas
fields. The amphibians were (given with the number of atlas fields with the species found):
119 - Common frog Rana temporaria Linnaeus, 1758; 114 - Common toad Bufo bufo
(Linnaeus, 1758); 97 - Moor frog Rana arvalis Nilsson, 1842; 94 - Fire-bellied toad Bomhina
bombina (Linnaeus, 1761); 93 - Pool frog Rana lessonae Camerano, 1882; 87 - Tree frog
Hyla arhorea (Linnaeus, 1758); 85 - Green toad Bufo viriiüs Laurenti, 1768; 72 - Smooth
newt Triturus vulgaris (Linnaeus, 1758); 70 - Spadefoot Pelobales fuscus (Laurenti, 1768); 69
- Edible frog Rana kl. esculenia Linnaeus, 1758; 39 - Great crested newt Triturus cristatus
(Laurenti, 1768); 30 - Marsh frog Rana ridibunda Pallas, 1771 and 28 - the Natterjack Bufo
calamita Laurenti, 1768. The reptile species (given with the number o f atlas fields) were: 94
- Sand lizard Lacerta agilis Linnaeus, 1758; 72 - Slow-worm Anguis fragilis Linnaeus, 1758;
67 - Common lizard Lacerta vivipara Jacquin, 1787; 60 - Grass snake Natrix natrix (Linnaeus,
1758), 57 - Adder Vipera berus (Linnaeus, 1758) and 4 - the Smooth snake Coronella austriaca
Laurenti, 1768. Six adult specimens of the European pond terrapin Emys orbicularis (Linnaeus)
were also found, but breeding of this species in the area studied was not confirmed.Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 dofinansowane zostało ze środków MNiSW w ramach działalności upowszechniającej naukę
A note on square-free factorizations
We analyze properties of various square-free factorizations in greatest common divisor domains (GCD-domains) and domains satisfying the ascending chain condition for principal ideals (ACCP-domains)
How to calculate the main characteristics of random uncorrelated networks
We present an analytic formalism describing structural properties of random
uncorrelated networks with arbitrary degree distributions. The formalism allows
to calculate the main network characteristics like: the position of the phase
transition at which a giant component first forms, the mean component size
below the phase transition, the size of the giant component and the average
path length above the phase transition. We apply the approach to classical
random graphs of Erdos and Renyi, single-scale networks with exponential degree
distributions and scale-free networks with arbitrary scaling exponents and
structural cut-offs. In all the cases we obtain a very good agreement between
results of numerical simulations and our analytical predictions.Comment: AIP conference proceedings format, 17 pages, 6 figure
THE CONCEPT OF INTELLECTUAL CAPITAL IN DEVELOPMENT SYSTEMS
The human capital and structural capital constitute the primary assets of every organisation and more and more every territory: on urban, local, regional, national and global levels. Restructuring technique, technology, organisation of production and work (means of production, subjects of work, power factors and economic factors) necessitates great knowledge, competence and skills, as well as the right organisational culture and philosophy. These factors constitute the basic elements of human capital. Mutual dependency of these factors results in the need of proper management of planning, organisation and motivation as well as of controlling human capital. Business practice confirms the need of developing basic organisational features that would result in creating a unique corporate image. It turns out that an individual character of a company facilitates its winning competitive advantage. Shaping the basic variables in corporate resources enables one to identify technical, organisational, economic and social features. Creating an individual character of a company on the basis of primary material resources rarely brings the desired effect. The material character of technical, organisational and economic resources is a feature that may be easily copied by competitors. Among the distinguished features, only human capital may thus decide on the individual character of a company.human capital, intellectual capital
Coevolution of Information Processing and Topology in Hierarchical Adaptive Random Boolean Networks
Random Boolean networks (RBNs) are frequently employed for modelling complex
systems driven by information processing, e.g. for gene regulatory networks
(GRNs). Here we propose a hierarchical adaptive RBN (HARBN) as a system
consisting of distinct adaptive RBNs - subnetworks - connected by a set of
permanent interlinks. Information measures and internal subnetworks topology of
HARBN coevolve and reach steady-states that are specific for a given network
structure. We investigate mean node information, mean edge information as well
as a mean node degree as functions of model parameters and demonstrate HARBN's
ability to describe complex hierarchical systems.Comment: 9 pages, 6 figure
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