scholarly journals Biogeography, inventory and new data on reptiles of M’sila region, Algeria

2021 ◽  
Author(s):  
Hadj Aissa Benelkadi ◽  
Adel Mammeri ◽  
Mansour Amroun
Keyword(s):  
Statistical Analysis ◽  
Small Area ◽  
Near Threatened ◽  
Reptilian Species

This study is the first contribution to the evaluation of reptile diversity in different habitats of M’sila region, Algeria. We carried out 94 trips between 2016 and 2018 across three sites: Mergueb (six stations), L’mhazem (three stations) and Kaf Afoul (two stations), on average, accompanied by prospectors. Our aims were to make an inventory of reptilian species in this region, as well as to study their diversity, distribution, ecology and abundance. Altogether, we recorded 193 specimens belonging to 22 species: two turtles, one amphisbaenian, twelve lizards and seven snakes. Two species classified as Near Threatened by the IUCN were recorded: Uromastyx acanthinurus (Bell, 1825) and Daboia mauritanica (Duméril & Bibron, 1848). Statistical analysis revealed that the type of habitat directly influences the distribution of reptiles in the study area. Although this small area is rich in reptilian species, their abundance remains low and worrying

scholarly journals A Catalogue of Radio Sources Between Declinations ?50° and ?80°

1961 ◽  
Vol 14 (4) ◽  
pp. 497 ◽  
Author(s):  
BY Mills ◽  
OB Slee ◽  
ER Hill
Keyword(s):  
Statistical Analysis ◽  
Radio Telescope ◽  
Small Area ◽  
Radio Sources ◽  
Low Weight ◽  
Cross Type

A catalogue has been prepared of the radio sources observed between declinations -50� and -80�, using the Sydney cross-type radio telescope at a wavelength of 3�5 m; a total of 219 sources is listed. This supplements the earlier catalogues for the declination ranges +10� to -20� and -20� to -50�. In addition to the positions and intensities of the sources, angular sizes of 42 of the strongest sources are given. As before, identifications with bright optical objects have been sought, and a number of possible identifications with emission nebulae and bright galaxies are listed. Because of the small area of sky covered by the present catalogue, the numbers of sources are small (compared with those in our earlier catalogues) so that the statistical analysis of their distribution has comparatively low weight.

scholarly journals Small-area spatial statistical analysis of malaria clusters and hotspots in Cameroon;2000–2015

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Marlvin Anemey Tewara ◽  
Prisca Ngetemalah Mbah-Fongkimeh ◽  
Alimu Dayimu ◽  
Fengling Kang ◽  
Fuzhong Xue
Keyword(s):  
Statistical Analysis ◽  
Small Area ◽  
Spatial Statistical Analysis

scholarly journals Conservation status of amniotes found in and around Balapur Pond of District Prayagraj (Uttar Pradesh), India

2020 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Ashok Kumar Verma
Keyword(s):  
Conservation Status ◽  
Mammalian Species ◽  
Bird Species ◽  
Uttar Pradesh ◽  
Avian Species ◽  
Critically Endangered ◽  
Naturally Occurring ◽  
Near Threatened ◽  
Reptilian Species

Perennial Balapur Pond was surveyed and studied to assess the conservation status of reptiles, birds and mammals naturally occurring in and around it. The survey was conducted from January 2018 to June 2019. During entire survey, a total of 7 species of reptiles, 11 species of birds and 8 species of mammals were identified. Among reptilian species reported, 1 species comes under NT (near threatened), 1 species LC (least concern) while 5 species have no special status (NSS). One avian species was CR (critically endangered), one NT (near threatened) and 9 bird species were LC (least concern). Out of 8 mammalian species recorded, one was EN (endangered), one VU (vulnerable) and remaining 6 LC (least concern).Most of the avian and mammalian species are lacking conducive ambience and hunted for food.   

scholarly journals Wpływ emisji energii z terenów zurbanizowanych i szlaków komunikacyjnych na zmiany w rozwoju ekosystemów w ich otoczeniu

2012 ◽  
Vol 10 (2) ◽  
pp. 73-85
Author(s):  
Urszula Kaźmierczak ◽  
Andrzej Kulczycki
Keyword(s):  
Energy Consumption ◽  
Statistical Analysis ◽  
Human Health ◽  
Chemical Reactions ◽  
Environmental Effects ◽  
Acoustic Waves ◽  
Urban Areas ◽  
Small Area ◽  
Energy Input ◽  
Mechanical Energy

This article aims to draw attention to the hitherto unexplored and scarcely noticed the problem of the effects of the consumption of increasing amounts of energy to human health and ecosystems exposed to emissions processed in the phase of energy consumption. Ever-increasing amounts of energy are consumed in relatively small urban areas, in communication routes, and in airport areas. As far as Poland is concerned, these areas represent less than 10% of the country. For such a small area the energy consumed is converted to other forms of energy, much of which is emitted into the environment. These emissions primarily include heat and various forms of mechanical energy, mainly that of acoustic waves. It studies the effect of noise on the health of people living in the vicinity of highways, as well as studies of ecosystems in the surrounding routes. There is still no explanation for the reasons for this phenomenon, as research in this area has been mainly carried out at the level of statistical analysis. The article has pointed out the possible causes of this phenomenon. The new theory of catalysis demonstrates the effect of mechanical energy input on the direction and rate of chemical reactions. This effect can also be significant in the case of biochemical reactions. Finally, the paper points out the need and direction of research, conducted at various levels, to determine and explain the environmental effects of increasing energy consumption, other than the greenhouse one.

A diversity and conservation inventory of the Herpetofauna of the Cuautlapan Valley, Veracruz, Mexico

Zootaxa ◽  
2016 ◽  
Vol 4205 (2) ◽  
pp. 127 ◽  
Author(s):  
NELSON M. CERON DE LA LUZ ◽  
JULIO A. LEMOS-ESPINAL ◽  
GEOFFREY R. SMITH
Keyword(s):  
Small Area ◽  
Habitat Degradation ◽  
Iucn Red List ◽  
Red List ◽  
Field Surveys ◽  
Rich Diversity ◽  
Reptile Species ◽  
Hemidactylus Frenatus ◽  
Near Threatened ◽  
Special Protection

We compiled an inventory of the amphibians and reptiles of the Cuautlapan Valley, Veracruz, Mexico based on field surveys and museum and literature records. We found a total of 78 species: 28 amphibians (6 Salamanders and 22 anurans); and 50 reptiles (three turtles, 18 lizards, and 29 snakes). These taxa represent 26 families (eight amphibian families, 18 reptile families) and 60 genera (19 amphibian genera, 41 reptile genera). Two of these species are not native to the area (Rhinoclemmys pulcherrima and Hemidactylus frenatus). According to the IUCN red list, five species are Critically Endangered, two are Endangered, four are Near Threatened, and four are Vulnerable. In the SEMARNAT (Secretaría del Medio Ambiente y Recursos Naturales) listing, one species is Endangered, eight species are Threatened, and 25 are Subject to Special Protection. Even though the Cuautlapan Valley is represented by a relatively small area it hosts a rich diversity of amphibian and reptile species, many of which are at risk and protected under Mexican law. This valley lies between the growing cities of Orizaba and Cordoba which have contributed to habitat degradation threatening the existence of the wildlife that occurs there. 

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Rocking Beam Microarea Diffraction Applied to Metallic thin Films

1976 ◽  
Vol 34 ◽  
pp. 396-397
Author(s):  
R. H. Geiss
Keyword(s):  
Thin Films ◽  
Electron Diffraction ◽  
Small Area ◽  
Objective Lens ◽  
Electron Optics ◽  
Metallic Thin Films ◽  
Transmission Electron Diffraction ◽  
Transmission Electron ◽  
Sample Height ◽  
Scanning Transmission

The theory and practical limitations of micro area scanning transmission electron diffraction (MASTED) will be presented. It has been demonstrated that MASTED patterns of metallic thin films from areas as small as 30 Åin diameter may be obtained with the standard STEM unit available for the Philips 301 TEM. The key to the successful application of MASTED to very small area diffraction is the proper use of the electron optics of the STEM unit. First the objective lens current must be adjusted such that the image of the C2 aperture is quasi-stationary under the action of the rocking beam (obtained with 40-80-160 SEM settings of the P301). Second, the sample must be elevated to coincide with the C2 aperture image and its image also be quasi-stationary. This sample height adjustment must be entirely mechanical after the objective lens current has been fixed in the first step.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

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