scholarly journals Application of modern geotechnologies for protection of territories against rockfall processes

2016 ◽  
Vol 3 (2) ◽  
pp. 74-78
Author(s):  
Сергей Нуйкин ◽  
Sergey Nuykin
Keyword(s):  
Clay Soils ◽  
Concrete Piles ◽  
Advantages And Disadvantages ◽  
Scope Of Application

The method of pressing installation factory concrete piles is proposed. Main advantages and disadvantages of the method and it’s analyze, defined the scope of application are described. Authors give recommendations on using installation in clay soils for construction-confined projects. In the publication constructive units, elements and components to improve this method are given

scholarly journals An Experimental Study on the Effect of Tire Powder on the Geotechnical Properties of Clay Soils

2018 ◽  
Vol 4 (3) ◽  
pp. 594 ◽  
Author(s):  
Davood Akbarimehr ◽  
Esmael Aflaki
Keyword(s):  
Clay Soil ◽  
Geotechnical Properties ◽  
Atterberg Limits ◽  
Clay Soils ◽  
Positive Effects ◽  
Advantages And Disadvantages ◽  
Different Types ◽  
Problematic Soils ◽  
Geotechnical Problems ◽  
Comprehensive Study

With respect to the increasing production of tire wastes, the use of these wastes as an additive in civil engineering has always gained attentions of researchers due to their positive effects on material properties and reduction of environmental problems. Clay soils, as problematic soils, have always caused geotechnical problems including high Atterberg limits and consequently low workability. Tire powder, as one of the products of tire wastes, lacks clay cohesion and it can be effective in altering the plasticity of clay soils. As no comprehensive study has been conducted in this regard specifically on Tehran clay soil yet, this research studies experimentally the effect of adding different percentages of tire powder to clay soil at the Atterberg limits of clay soils with two different types of plasticity. More over according to previous studies, the effect of tire powder on other geotechnical properties of clay soils and the advantages and disadvantages of using tire powder in clay soils are discussed. The results indicate that addition of tire powder to clay soils has positive effects on reducing the Atterberg limits, increasing efficiency, and improving resistance, permeability, swelling reduction, and settlement properties, and reducing soil density and it can be used as an additive in improving clay soils.

scholarly journals Optimizing the sand cushion

2019 ◽  
Vol 7 (4) ◽  
pp. 32-35
Author(s):  
Vyacheslav Glukhov ◽  
Ol'ga Hryanina ◽  
Svetlana Glukhova ◽  
Anastasia Pugina
Keyword(s):  
Clay Soils ◽  
Construction Site ◽  
Advantages And Disadvantages ◽  
Saturated Clay ◽  
Metal Pipes ◽  
Water Saturated ◽  
Economic Comparison ◽  
Sand Cushion

It is known that the stress values and the distribution of the latter in depth depend to a large extent on the size of the Foundation sole and especially the width. In this article, in order to select the optimal width of the Foundation sole and the thickness of the sand cushion, the influence of the sole width on the distribution of vertical stresses in the ground base is studied on the example of foundations for metal pipes. The presence of weak water-saturated clay soils within the construction site was taken into account. Variants of the device from traditional prismatic piles and foundations of small laying on a sandy pillow are offered. a technical and economic comparison of options was carried out. The advantages and disadvantages of each option are analyzed. Using the methodology of verification calculations in the design of sandbags, the optimization of the accepted version of the foundations was made.

Study on Analysis Methods of Tear Propagation of Fabric Laminates

2011 ◽  
Vol 194-196 ◽  
pp. 2429-2434 ◽  
Author(s):  
Jun Hui Meng ◽  
Dong Xu Liu ◽  
Yi Zhang ◽  
Zhao Jia ◽  
Ming Yun Lv
Keyword(s):  
Testing Machine ◽  
Critical Stress Intensity Factor ◽  
Paper Analysis ◽  
Biaxial Stress ◽  
Empirical Formulas ◽  
Advantages And Disadvantages ◽  
Analysis Methods ◽  
Air Vehicle ◽  
Scope Of Application ◽  
Tear Propagation

Tear propagation is a typical breakage modality of fabric laminates. In this paper, analysis methods and their empirical formulas about tear propagation of a kind of fabric laminate which is used in high altitude lighter-than-air vehicle (LTA) is studied. The methods include Griffith’s energy balance method, Thiele’s empirical formula method, Stress field consideration method and critical stress intensity factor method. Testing about tear propagation strength in biaxial stress is done by a tailor-made testing machine to study on the methods. And then a comparison is drawn between these formulas and results of the experimentation. Subsequently, advantages and disadvantages of these formulas and their scope of application are concluded. While by using the empirical formulas, the analysis of tear propagation of different incision shapes is given. It is useful for the further study on different fabric laminates.

scholarly journals EVALUATION OF EFFORT INDENTATION OF PREFABRICATED REINFORSED CONCRETE PILES IN CLAY SOILS

2019 ◽  
Vol 6 (4) ◽  
pp. 29-35
Author(s):  
Анатолий Полищук ◽  
Anatoliy Polischuk ◽  
Сергей Нуйкин ◽  
Sergey Nuykin
Keyword(s):  
Reinforced Concrete ◽  
Hydraulic System ◽  
Electrical Signal ◽  
Urban Environments ◽  
Clay Soils ◽  
Special Device ◽  
Digital Information ◽  
Cross Sectional ◽  
Concrete Piles ◽  
Reinforced Concrete Piles

The article discusses the pile indentation equipment for dive prefabricated reinforced concrete piles which are used in clay soils in urban environments. It was developed in 2003 and intended for dive reinforced concrete piles of different cross-sectional (square, round, prismatic, ring, etc.) length from 5 to 12 meters. Different modifications (SVU-1, SVU-2 and SVU-3) have been prepared during the period of equipment’s exploitation. They have dived more than 35,000 prefabricated concrete piles in Tomsk, Novosibirsk, Omsk, Kemerovo and other cities of Russia. In 2011 specialists of “FundamentSpetsStroy” (Tomsk) and specialists from the Kuban State Agrarian University (Krasnodar) developed a special device-meter, which provides to get information on efforts of the indentation piles at predetermined elevations. The article describes a structure of device and its operating principle. The principle of device based on the conversion parameters of pressure hydraulic system of pile indentation equipment during the pile diving into an electrical signal that is converted to digital information. The article presents the main results of effort indentation of piles, also tables of received values and graphics. The article performed an analysis and the generalization results of experimental research.

Recent Patents on Detection Device of Surface Defects on Bearing Balls

2021 ◽  
Vol 14 ◽  
Author(s):  
Chengyi Pan ◽  
Junhong Tang ◽  
Guanqun Cao ◽  
Bingtao Hu
Keyword(s):  
Surface Defects ◽  
Detection Efficiency ◽  
High Surface ◽  
Detection Accuracy ◽  
High Quality ◽  
High Surface Quality ◽  
Existing Problems ◽  
Advantages And Disadvantages ◽  
Surface Detection ◽  
Scope Of Application

Background: With the continuous pursuit of high-quality and high-precision bearings in industrial production, the processing accuracy of bearing balls is increasing, and high surface quality has become the most basic requirement for high-quality bearing balls. Studying the working principle of detection device of surface defects on bearing balls is beneficial to improve the surface accuracy of bearing balls and the quality of bearings. Objective: To meet the increasing requirements for measurement accuracy and efficiency of surface detection on bearing balls, the devices and methods of surface detection on bearing balls have been improved constantly. Methods: This paper reviews various representative patents related to the detection device of surface defects on bearing balls. The advantages and disadvantages of the patents are analyzed. Results: Through tracing the characteristics of different types of the detection device of surface defects on bearing balls, the main existing problems in the current are concluded and analyzed, such as low detection accuracy, low detection efficiency, and limited scope of application, etc. The future development of patents on detection device of surface defects on bearing balls is discussed. Conclusion: The optimization and development of detection device of surface defects on bearing balls are beneficial to improve the detection accuracy and efficiency of surface defects on bearing balls, and are conducive to expand the scope of application of the detection devices. More related patents on detection device of surface defects on bearing balls will be invented.

scholarly journals Advantages and disadvantages of morphological methods in engineering

2020 ◽  
Vol 329 ◽  
pp. 03028
Author(s):  
Dmitry Rakov
Keyword(s):  
Parametric Optimization ◽  
Preliminary Design ◽  
Structural Synthesis ◽  
Advantages And Disadvantages ◽  
Morphological Approach ◽  
Methods Of Synthesis ◽  
Scope Of Application ◽  
Two Stages ◽  
Application Classification ◽  
Synthesis Stage

The morphological methods are successful analytical and practical tools for development and choice of new engineering solutions. They can be successfully used in the conceptual and preliminary design stages of the development of new systems, products and technologies. The article discusses the scope of application, classification, advantages and disadvantages of this approach. The design process consists of two stages - structural synthesis and parametric optimization. The morphological approach is used for the structural synthesis stage. Structural synthesis generates a significant number of variants. This stage is the most important tool for achieving the high characteristics of the systems being designed. The article discusses the ratios between parametric, structural and structural-parametric methods of synthesis. The possibility of computerizing the stage of structural synthesis on morphological approach is discussed.

A Research on Methods to Improve the Subgrade Stability in Permafrost Regions

2013 ◽  
Vol 671-674 ◽  
pp. 1193-1196
Author(s):  
Ji Deng ◽  
Jian Chun Chen ◽  
Zi Ling Zhang
Keyword(s):  
Reference Value ◽  
Improved Method ◽  
Advantages And Disadvantages ◽  
Scope Of Application ◽  
Permafrost Regions

There are a lot of methods to improve the subgrade stability in permafrost regions. The scope of application and the advantages and disadvantages of the five methods including heat stick, insulation method, sunshade awning, particle improved method and ventiduct subgrade were analyzed. It can provide reference value for subgrade construction and diseases lot maintenance.

scholarly journals Progress in facial reinnervation

2021 ◽  
Vol 9 (3) ◽  
pp. 177-185
Author(s):  
Hanshuo Zhu ◽  
Lin Shen ◽  
Min Yang ◽  
Xuesheng Zheng
Keyword(s):  
Facial Nerve ◽  
Facial Paralysis ◽  
Treatment Options ◽  
Nerve Graft ◽  
Facial Movements ◽  
Advantages And Disadvantages ◽  
Direct Anastomosis ◽  
Scope Of Application ◽  
New Procedures ◽  
Nerve Transposition

Facial nerve injury often results in facial paralysis, which seriously affects the patients both aesthetically and functionally. Facial nerve reinnervation methods, including direct anastomosis, nerve graft, nerve transposition, cross-facial nerve graft, and combined surgeries, have recently become a hot topic with many new procedures being explored. This study summarizes the relevant literatures and discusses the scope of application, advantages, and disadvantages of the different methods. The treatment options or combined surgeries for facial nerve reinnervation should be individualized for specific patients to achieve the best reanimation outcome with good static symmetry, facial tone, and spontaneous, natural, symmetrical, and strong facial movements.

scholarly journals Technologie mobilne jako nośnik zmiany – w opinii nauczycieli z czterech krajów europejskich

2018 ◽  
pp. 203-220
Author(s):  
SYLWIA GALANCIAK ◽  
ANNA WEISS ◽  
MIRIAM JUDGE
Keyword(s):  
Qualitative Research ◽  
Educational Process ◽  
European Countries ◽  
Mobile Technologies ◽  
Individual Interviews ◽  
Advantages And Disadvantages ◽  
Teachers And Students ◽  
Scope Of Application ◽  
The Individual ◽  
Adam Mickiewicz

Sylwia Galanciak, Miriam Judge, Anna Weiss, Technologie mobilne jako nośnik zmiany – w opinii nauczycieli z czterech krajów europejskich [Mobile technologies as a carrier of change – in the opinion of teachers from four European countries]. Interdyscyplinarne Konteksty Pedagogiki Specjalnej, nr 23, Poznań 2018. Pp. 203-220. Adam Mickiewicz University Press. ISSN 2300-391X. DOI: https://doi.org/10.14746/ikps.2018.23.12 The article presents partial results of qualitative research conducted among 83 respondents (28 teachers and 55 students) from four European countries, using tablets to work at school. The aim of the research was to recognize the scope of application of mobile technologies by teachers and students and also their opinions on the usefulness of these technologies as a support in the process of education. An image of teachers and students, who realistically assess the advantages and disadvantages of tablets, and who redefine their role in the educational process, emerges from the individual interviews and focus conversations.

Discussion on Application of Digging out the Image in Photoshop Image Processing Method

2014 ◽  
Vol 998-999 ◽  
pp. 851-854
Author(s):  
Yue Hong Wang
Keyword(s):  
Image Processing ◽  
Processing Method ◽  
Image Processing Method ◽  
Advantages And Disadvantages ◽  
Image Area ◽  
Scope Of Application ◽  
Processing Software ◽  
Image Processing Software

Image processing has been widely applied in various fields. Photoshop image processing software is the best one for the enthusiasts. At present, more and more people are interested in using Photoshop to create some characteristic pictures, while the key and difficulty part of image processing in Photoshop is matting method (create the image area).In order to help the image processing enthusiasts to accomplish in the process of image processing and create a more beautiful image, this paper introduces several commonly used matting methods in Photoshop and discusses in detail the scope of application, the using methods, the advantages and disadvantages of them.

Sign in / Sign up

Export Citation Format

Share Document