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2021 ◽  
pp. 48-54
Author(s):  
B. L. Djafarova

The paper is devoted to questions on optimum development of complex for control and evaluation of contamination of water basins used for collection of industrial waste water. The purpose of the paper is development of scientific-methodical basics for development of measuring system for control and evaluation of contamination of natural water basins with heavy metals using method of attenuation of irradiation of dissolved organic matters excited by external irradiation. The task on optimization of operational regime of measuring complex for control and evaluation of contamination of natural water basins by waste water of large scale point type polluter of environment with heavy metals. The known model of Shtern-Volmer is used as a basis which assumes non-linear relationship between formed complex and fluorescent irradiations attenuation degree. It is noted that potential possibilities of Shtern-Volmers model are used not fully till now. So that in known researches the water objects polluted by several same sources are mainly researched. It is shown that Shtern-Volmer model is also applicable for analysis and estimation of pollution of water basins by single strong polluter that is mining and processing plants. For analysis the suggested special parameter, inversely proportional to concentration of heavy metals in water is used. Integration of this parameter on all possible values of heavy metals concentration and imposition of special limitation condition on the searched for function of dependence of attenuated part of fluorescent irradiation on maximum concentration of heavy metals make it possible to formulate and solve the task on searching of optimum type of this function providing for the optimum regime of operation of the complex.


Author(s):  
L. Mitsevich ◽  
N. Zhukovskaya

Abstract. The article discusses methods for constructing and using digital photogrammetric and cartographic models as a basis for growing tree height control and plantation planning in aerodrome areas. Forests or gardens in the take-off and landing flight areas, exceeding special limitation surfaces, are dangerous obstacles and intended to cut down. Tree and bush vegetation should be under periodic monitoring because of their growth. The research was aimed to determine the maximum permissible obstacle height and tree age when it reaches the obstacle limitation surface altitude. For these purposes, it is proposed to use geospatial modeling and geoinformation analysis methods. As a basis for geospatial models, remote sensing optical stereo images were used. The allowable height is calculated as a difference between 3D obstacle limitation surface and the earth surface altitude values. The article presents the study results for a Belarus climatic zone, where the tree species predictive age in reaching the maximum permissible height is calculated. The main goal of the technology is to manage the aerodrome forest plantation growth without further labor-intensive monitoring, while ensuring the safety of aircraft flights.


2021 ◽  
Vol 310 ◽  
pp. 04003
Author(s):  
Liudmila Mitsevich ◽  
Natalia Zhukovskaya

The article discusses aerodrome geospatial modeling methods and geoinformation analysis for determining land use zones and obstacle restriction areas. Tall trees, buildings and structures, exceeding special limitation surfaces in the aerodrome flight areas, are obstacles that are dangerous. Using spatial modelling, which determines maximal permissible heights, it is proposed to predict the heights of natural and artificial vertical objects in order to analyse and plan land use capabilities. As a basis for spatial modeling, it is proposed to use stereoscopic models with a resolution of 0.3m, built on aircraft-based scanner images. Using the methods of geoinformation analysis, it is suggested to make horizontal zoning of aerodrome areas according to the most important air navigation safety and ecological indicators (power lines, roads, permitted classes of construction objects location). The study presents the research results of the proposed methodology for the Republic of Belarus aerodrome.


Author(s):  
Тамара Геннадьевна Черненко

В статье анализируются дискуссионные положения об основании существования института давности привлечения к уголовной ответственности, приводятся аргументы в пользу вывода о том, что основание института давности заключается в отпадении либо ослаблении общественной опасности лица, совершившего преступление. Рассматриваются вопросы о начале исчисления срока давности применительно к преступлениям с материальным составом, длящимся, продолжаемым, преступлениям, а также преступлениям, совершаемым в соучастии. Поддерживается научная позиция относительно необходимости восстановления правила о прерывании течения срока давности привлечения к уголовной ответственности в случае совершения виновным лицом нового преступления. Обосновывается вывод о необходимости введения специальных давностных сроков для лиц, уклоняющихся от следствия или суда либо уплаты судебного штрафа, предлагается для указанных лиц предусмотреть увеличение наполовину сроков давности, предусмотренных в части первой статьи 78 УК РФ. The article analyzes the controversial provisions on the basis of the existence of the institution of prescription of criminal prosecution, arguments in favor of the conclusion that the basis of the institution of prescription is to drop or weaken the social danger of the person who committed the crime. The questions of the beginning of the calculation of the Statute of limitations in relation to crimes with material composition, continuing, crimes, as well as crimes committed in complicity are considered. The scientific position on the need to restore the rule on the interruption of the Statute of limitations for criminal prosecution in the case of committing a new crime by the guilty person is supported. The conclusion about necessity of introduction of special limitation periods to persons evading investigation or trial or payment of court fines is proposed for these persons to provide for the increase of half-periods of limitation set out in part one of article 78 of the criminal code.


2008 ◽  
Author(s):  
Martin Fenner

Microsoft yesterday announced on the Live Search Blog that their Academic Search will be closed next week.And Google Scholar still has shortcomings, including the lack of special limitation features that are found in PubMed. ...


Geophysics ◽  
2000 ◽  
Vol 65 (3) ◽  
pp. 934-942 ◽  
Author(s):  
Jianlin Zhu ◽  
Jim Dorman

Numerical modeling of seismic waves in transversely isotropic (TI) media is often restricted to special cases where the plane of isotropy coincides with a coordinate plane of the model medium. We remove this special limitation by developing a scheme in which symmetry axes of individual component TI media are oriented arbitrarily with respect to the coordinate axes of the composite model. In these general TI media, the elastic constants for each homogeneous anisotropic region are a 6 × 6 matrix of nonzero elements calculated by an arbitrary rotation. Then, 3-D modeling can readily deal with the coupling of the three components of wave motion. However, required computer memory and execution time may exceed practical limits. Therefore, we implement a finite‐element modeling process for TI media in which elastic properties vary only in two dimensions but component media have planes of isotropy in arbitrary directions. We compute three components of particle motion since the latter are coupled together in these media. The computational load is about twice that of the special cases where the planes of isotropy coincide with the coordinate planes. Three‐component synthetic profiles corresponding to two sample models clearly illustrate the behavior of seismic waves in anisotropic media, including shear‐wave splitting and coupling between the in‐line and cross‐line motion.


Parasitology ◽  
1943 ◽  
Vol 35 (3) ◽  
pp. 89-111 ◽  
Author(s):  
Ernest Baldwin

A method is described for the detection of anthelminthic potency. The procedure does not call for exceptional technical skill, is relatively economical of drugs and living material alike, and is rapid and convenient in application. It has certain limitations such as are inherent in any in vitro method, and a special limitation in that it is not applicable to the study of drugs which act otherwise than on the neuro-muscular mechanisms of nematodes. Within these limitations it responds to compounds of known anthelminthjc efficiency and shows little or no response to compounds known to be devoid of anthelminthie value. Approximate quantitative data can be obtained with its aid, the reactions provoked by a given drug are substantially the same in different individuals, and each test provides a visible record of the influence of the drug under examination.We do not claim that this procedure can in any sense replace experiments upon infested hosts, but must rather be followed up by such experiments when a promising degree of anthelminthie potency has been detected with its aid. We do, however, believe that it has a very real usefulness within the field to which its application is limited. As a preliminary device which allows the selection of promising compounds from large groups of new synthetic products it has already demonstrated its value in tests carried out in this laboratory on a series of about fifty new compounds prepared by Prof. Friedmann.


Philosophy ◽  
1926 ◽  
Vol 1 (2) ◽  
pp. 211-233
Author(s):  
Frederick Lugard

The subject of discussion this evening is “ The Problem of Colour in Relation to the Idea of Equality,” and though the last seven words would seem to indicate some special limitation, it is in fact difficult to divide this question into watertight compartments. For the basis of all philosophical study is accuracy of definition, and we must therefore begin by forming a precise conception of what the phrase “ Colour problem ” connotes before we proceed to discuss its bearing from a physiological, political, or sociological “ equality ” point of view. Thus at the outset we find ourselves in the very heart of a controversy, for it is difficult to find two people who will agree as to the definition of the Colour problem. Physiologically there is no line of demarcation, for of the inhabitants of North Central Asia many are as light—and indeed lighter—in the colour of their skin, their hair and their eyes than the Southern races of Europe, and the same may be true of Creoles, Quadroons, and Octaroons.


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