Experimental Studies on the Effect of Vegetation Density to Change Underground Seepage Rate and Stability of Slopes

2020 ◽  
pp. 165-171
Author(s):  
Binod Tiwari
Keyword(s):  
Experimental Studies ◽  
Vegetation Density ◽  
Seepage Rate ◽  
Stability Of Slopes

scholarly journals Development of a laboratory and experimental installation for checking the reliability of a mathematical model and an information and technical method for preventing emergencies at landfills of solid household waste with technological liquidation energy-intensive equipment

2021 ◽  
pp. 67-79
Author(s):  
Olena Azarenko ◽  
Volodymyr Mirnenko ◽  
Nina Rashkevich ◽  
Olga Shevchenko ◽  
Tatyana Shevchenko
Keyword(s):  
Mathematical Model ◽  
Physical State ◽  
Experimental Studies ◽  
Dynamic State ◽  
Household Waste ◽  
Tangential Load ◽  
Angle Of Internal Friction ◽  
Laboratory Setup ◽  
Stability Of Slopes ◽  
Series Of Experiments

The paper presents a developed laboratory setup that allows experimental studies of the influence of indicators of the physical state of landfill soil on the stability of slopes to shear, to check the reliability of the mathematical model and the information and technical method developed on its basis for preventing emergencies of the cascade type of propagation due to the displacement of landfill soil on a solid landfill household waste with technological liquidation energy-intensive equipment. The main elements of the developed installation are a rectangular experimental box with swivel and fixed parts, swivel and locking mechanisms, tabletop plates, a sprayer, and a tangential load system. As the main requirements for the installation, the possibility of conducting a series of experiments based on the use of landslide experimental blocks with a change in their humidity, density, temperature and angle of inclination of the base of the sliding surface, as well as mechanical characteristics - the angle of internal friction, specific adhesion of landfill soil. Carrying out research using a laboratory setup is based on the assumption that the transition of a landslide experimental block of landfill soil into a dynamic state is considered the onset of an emergency at the object level of distribution. In the course of the work, a technique was developed for conducting experimental studies and processing observation results. The methodology includes the following procedures: establishment of initial and boundary conditions; preparation of a laboratory installation; conducting a series of experiments to determine the mechanical parameters and the shear angle of the experimental blocks, and a series of experiments to determine the indicators of moisture, temperature and density of landfill soil on the fact of the shift, taking into account the gradual increase in moisture; statistical processing to obtain a statistical sample of the values of the effective indicators of the physical state of landfill soil included in the confidence interval according to the classical statistical method - Student's t-test.

scholarly journals ON THE POSSIBILITY OF ESTIMATING THE STABILITY OF SLOPES AND SLOPES ON THE BASIS OF THE SOLUTION OF THE MIXED PROBLEM OF THE ELASTICITY THEORY AND THEORY OF SOIL PLASTICITY

2020 ◽  
Vol 8 (1) ◽  
pp. 48-58
Author(s):  
Oksana Bogomolova ◽  
Andrej Zhidelev
Keyword(s):  
Mixed Problem ◽  
Pressure Coefficient ◽  
Experimental Studies ◽  
Stability Margin ◽  
Soil Mass ◽  
Breaking Load ◽  
Theory Of Elasticity ◽  
Stability Of Slopes ◽  
Analytical Construction ◽  
The Stability

the article briefly describes the physical model of the mixed problem of the theory of elasticity and the theory of plasticity of the soil, identifies the features of its formulation and solution; formulas are presented for calculating stresses inside plastic regions and expressions that allow one to determine their position, dimensions and shape in the case of an elastoplastic stress distribution in a soil mass. A comparison is made of the results of experimental studies of the fracture processes of slope models from equivalent materials under loading, obtained independently by other authors, with the results of the analytical construction of plastic strain regions for the conditions of the mixed problem. It was established that the constructed areas are in satisfactory agreement with the results obtained in laboratory studies and with the results of field observations. The areas of plastic deformations for slope models of equivalent materials under breaking load are determined. The results of calculations of the stability of real natural slopes are presented, which include the calculation of stability margin coefficients and the construction of plastic regions for various values ​​of the lateral pressure coefficient of soils. Stability calculations are performed and their results are presented for real soil massifs

scholarly journals ACTIVITY TO PREVENT EMERGENCY SITUATIONS OF CASCADE TYPE OF SPREADING RELATED TO SOIL LANDSLIDE

2021 ◽  
pp. 52-57
Author(s):  
Nina Rashkevich ◽  
Volodymyr Koloskov ◽  
Igor Fedyuk
Keyword(s):  
Solid Waste ◽  
Experimental Research ◽  
Experimental Studies ◽  
Shear Load ◽  
Technological Equipment ◽  
Emergency Situations ◽  
Stability Of Slopes ◽  
Before And After ◽  
The Stability ◽  
Cascade Type

Landfills for solid waste with liquidation energy-intensive technological equipment, due to emergencies of the cascade type of distribution associated with the landslide of landfills, pose a man-made environmental hazard. Experimental studies to determine the effect of humidity, density, temperature of landfill soils on the stability of slopes on landslides have shown that with increasing humidity and temperature, the resistance of the array to displacement decreases. The lower the density, the greater the ability to penetrate and saturate with moisture, which creates additional shear load. According to the results of experimental research, a method of prevention of cascade-type emergencies related to landfill landslides at the landfill with liquid energy-intensive technological equipment has been developed to prevent the consequences of danger from escalating from site to higher levels of distribution. The method consists of measures "before" and "after" the fact of moving the landslide.

Experimental studies of the dynamic stability of slopes composed of soils prone to slump-type settlement

1981 ◽  
Vol 18 (4) ◽  
pp. 152-154
Author(s):  
A. A. Musaélyan ◽  
B. E. Shadchinev ◽  
L. V. Lavrusevich ◽  
L. O. Epaneshnikov
Keyword(s):  
Dynamic Stability ◽  
Experimental Studies ◽  
Stability Of Slopes ◽  
Type Settlement

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

Effects of Attachment Styles on the Experience of Equity in Heterosexual Couples Relationships

2003 ◽  
Vol 50 (4) ◽  
pp. 298-310 ◽  
Author(s):  
Ina Grau ◽  
Jörg Doll
Keyword(s):  
Attachment Theory ◽  
Attachment Style ◽  
Intimate Relationships ◽  
Attachment Styles ◽  
Experimental Studies ◽  
The Other ◽  
Heterosexual Couples ◽  
Secure Attachment ◽  
Dependent Variables ◽  
Equity Ratio

Abstract. Employing one correlational and two experimental studies, this paper examines the influence of attachment styles (secure, anxious, avoidant) on a person’s experience of equity in intimate relationships. While one experimental study employed a priming technique to stimulate the different attachment styles, the other involved vignettes describing fictitious characters with typical attachment styles. As the specific hypotheses about the single equity components have been developed on the basis of the attachment theory, the equity ratio itself and the four equity components (own outcome, own input, partner’s outcome, partner’s input) are analyzed as dependent variables. While partners with a secure attachment style tend to describe their relationship as equitable (i.e., they give and take extensively), partners who feel anxious about their relationship generally see themselves as being in an inequitable, disadvantaged position (i.e., they receive little from their partner). The hypothesis that avoidant partners would feel advantaged as they were less committed was only supported by the correlational study. Against expectations, the results of both experiments indicate that avoidant partners generally see themselves (or see avoidant vignettes) as being treated equitably, but that there is less emotional exchange than is the case with secure partners. Avoidant partners give and take less than secure ones.

Exneriana – II – The Scientific Legacy of John E. Exner, Jr. 1Part of this paper was presented at the XIXth International Congress of Rorschach and Projective Methods, July 22–26, 2008, Louvain, Belgium.

2008 ◽  
Vol 29 (2) ◽  
pp. 81-107 ◽  
Author(s):  
Anne Andronikof
Keyword(s):  
Clinical Studies ◽  
Experimental Studies ◽  
Scientific Work ◽  
International Congress ◽  
Response Process ◽  
Scientific Legacy ◽  
Projective Test ◽  
Projective Methods ◽  
Comprehensive Picture ◽  
Complex Mechanisms

Based on an analysis of John Exner’s peer-reviewed published work from 1959 to 2007, plus a brief comment for an editorial in Rorschachiana, the author draws a comprehensive picture of the scientific work of this outstanding personality. The article is divided into three sections: (1) the experimental studies on the Rorschach, (2) the clinical studies using the Rorschach, and (3) Exner’s “testament,” which we draw from the last paper he saw published before his death (Exner, 2001/2002). The experimental studies were aimed at better understanding the nature of the test, in particular the respective roles of perception and projection in the response process. These fundamental studies led to a deeper understanding of the complex mechanisms involved in the Rorschach responses and introduced some hypotheses about the intentions of the author of the test. The latter were subsequently confirmed by the preparatory sketches and documents of Hermann Rorschach, which today can be seen at the H. Rorschach Archives and Museum in Bern (Switzerland). Exner’s research has evidenced the notion that the Rorschach is a perceptive-cognitive-projective test.

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