1,720,958 research outputs found
Ecological restoration in contaminated soils of Kokdzhon phosphate mining area (Zhambyl region, Kazakhstan)
No full textThis study provides results of an ecological restoration activity performed in the Kokdzhon phosphate mining of the Zhambyl region (a semi-desert mining area of Kazakhstan).
The test area was made by a quarry-hole, about 1.25 hectares wide, that was preliminarily filled with the earthy material of a dump and, subsequently, levelled. The total volume of human transported material (HTM) used was 700 tonnes. Soil samples were taken from 0 to 30 cm depth at 23 sampling sites and several soil quality parameters were determined. In the test area 750 tree species were planted in suitable dug holes: (150 seedlings of Russian Olive; 150 seedlings of Black Saxaul); 150 seedlings of Androsov Elm; 150 seedlings of Salt Cedar; 150 seedlings of Russian Salt Tree). In addition, a mixture of cereal and legume seeds (in equal amount of weight for each species) was seeded in 4 furrows, in between the tree lines. The results of this preliminary activity show a low engraftment of the plants used for the ecological restoration over one year. This could reasonably be due to the unfavourable soil characteristics of the test area that can be regarded as a human transported material (HTM), on which the action of the soil genetic factors, particularly, the biotic one, has yet to play out fully
Resistance of solonetzic soils to rocket and space activity impact in central Kazakhstan.
No full textIntroduction. This paper provides the results of a comparative analysis of physicochemical
and biological characteristics of soil cover at the fall places of the first
stage of “Proton" Launch vehicle (LV) in the area of Yu-2 (Central Kazakhstan). In
particular, we considered the ecological stability of brown solonetzic soils in combination
with Solonetz soil, to chemical pollution and variability of soil microflora
to mechanical stresses during the fall of the separated parts of space launch vehicles
(SLV SP). Materials and Methods. We have chosen those Kazakhstan's territories
that are used by the Baikonur Cosmodrome as an impact areas of separating
parts of space launch vehicles (SLV SP IA), in June 2017, to conduct ecological
studies in those places, where the first-stage vehicles of the Proton rocket have
been fallen in the Yu-2 zone (Central Kazakhstan). Here the pollution of UDMH
(unsymmetric dimethylhydrazine, rocket fuel, substance of the 1st class of toxic
hazard) has been detected in soils in 2000-2007. Control point were also chosen in
the adjacent territory. Morphological and physico-chemical properties of soil profiles
have been studied. In 10 soil samples, indicators of the state of microflora and
phytotoxicity were determined. Results and Conclusions. Based on the results of
the analysis of the characteristics of solonetzic soils at the fall places of separated
parts of space launch vehicles "Proton" in the Yu-2 zone (Central Kazakhstan), it
was concluded that they have high resistance to chemical pollution of UDMH. The
processes of physico-chemical transformation of UDMH and its processing by soil
microorganisms are assumed in the illuvial B horizons, due to the high content of
exchangeable sodium, against the background of sufficient soil moisture with an
alkaline pH-medium (up to strongly alkaline). At the same time, low microbiological
indices, the absence of spore-forming bacteria, and the presence of plant phytotoxicity
were found in soils of the fall places. Microbiological restoration of fertile
top soil in technogenic disturbed lands of the Yu-2 zone is extremely difficult in
conditions of high soil alkalinity, in the presence of saline clay and increased content
of carbonate
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
SOILS AND PLANTS IN AN ANTHROPOGENIC DUMP OF THE KOKDZHON PHOSPHORITE MINE (KAZAKHSTAN)
Full text linkSoil development is a crucial aspect in the process of mine spoil restoration and is also critical for the establishment of the vegetation. In this short paper, we present the features of mine proto-soils (i.e. soils at the early stage of development) and the natural vegetation species colonizing mine sites in a dry arid environment of Kazakhstan characterized by surface disturbance due to mine activity to access phosphorite deposit. These disturbed soils showed morphological features very different from each other (particularly horizons depth and sequence), even if the main chemical features were quite homogeneous. This is reasonably linked to the features of the Human Transported Material derived from mine operation that was scattered around the mine area. The most abundant natural plants found in the study area belong to the Poacee, Asteraceae and Fabacee families (with 4 species each). Biomass contribution for all species is very low; the root biomass was greater than above ground biomass, contributing to a modest soil development
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
