scholarly journals DYNAMICS OF SEEDLING PLANTING MACHINE EQUIPPED WITH VERTICAL DISTRIBUTOR AND ARTICULATED BUCKETS PLANTING UNIT

2021 ◽  
pp. 309-316
Author(s):  
P.M. Mitrache ◽  
M. Bularda ◽  
R. Ciuperca ◽  
I. Saracin
Keyword(s):  
Tensile Strength ◽  
Comparative Analysis ◽  
Working Conditions ◽  
Working Process ◽  
Technical Parameters ◽  
Functional Variants ◽  
Optimum Variant ◽  
Mathematical Relations

In this work we make a comparative analysis of the dynamics for two variants of seedling planting machines equipped with distributors and articulated buckets respectively: with the seedlings being placed in the furrow opened by a coulter; with the seedling being planted directly into the ground. The dynamics of the seedling planting machine equipped with vertical distributors and articulated buckets is seen from the perspective of the working process involving the placement of the seedling in the ground, its release, its covering with earth and its additional compaction. In principle, furrow opening is performed by a coulter and the vertical distributor with articulated buckets places and releases the seedling in the furrow, in the first variant, and in the second one, the seedling is inserted and released directly into the ground. In the paper are written the mathematical relations describing the dynamics of the seedling planting machine, in the two variants, and we perform their testing, make recordings, interpret the results, reach conclusions and make recommendations on the optimum variant. The agro-technical parameters and tensile strength of the planting machine are analysed in the two functional variants. The experiments were performed under the same working conditions for both variants analysed.

scholarly journals Problems of an Ergonomic Approach to the Design of a Uniform Medical Suit

2021 ◽  
Vol 12 (2) ◽  
pp. 184
Author(s):  
Venera M. Yumagulova ◽  
Elmira G. Akhmetshina ◽  
Gulnaz R. Ahmetshina
Keyword(s):  
Comparative Analysis ◽  
Working Conditions ◽  
Industrial Production ◽  
Information Source ◽  
Design Solution ◽  
Project Analysis ◽  
New Models ◽  
Design Documentation ◽  
Object Of Study ◽  
Practical Recommendations

The article presents the research in the design of a uniform medical suit and methods of implementing ergonomic requirements in the process of solving problems. The authors have chosen special uniforms for surgeons as an object of study and analysis. As a result of comparative analysis, it is noted that currently, the assortment does not meet consumer needs since many manufacturers do not attach much importance to the ergonomic requirements. The current domestic standards and regulatory and technical documents also do not always take into account the specialization and working conditions of a specialist. In the course of targeted research, the whole range of issues related to the pre-project analysis of the situation was resolved, the sequence of development of the design solution was indicated. The authors have given specific practical recommendations for the preparation of design documentation for a new model of a women's surgical blouse. The developed design documentation can serve as an information source when launching new models into industrial production since it is designed to meet the requirements for the ergonomics of surgeons.

TERMINOPATIYA: COACH

2020 ◽  
Vol 12 (12) ◽  
pp. 48-52
Author(s):  
N.M. Kolokolova ◽  
Keyword(s):  
Higher Education ◽  
Comparative Analysis ◽  
Working Conditions ◽  
Semantic Meaning ◽  
Professional Characteristics

The article analyzes the lexico-semantic meaning of the term of English origin coach and coaching, the frequency of its use in speech of the Russian-speaking society. A comparative analysis of the professional characteristics of the coach and the teacher, their working conditions and working methods is carried out. It is concluded that extrapolation of the concept of economic term to the sphere of general and higher education in Russia is irrelevant.

Virtual Prototype Simulation of Vertical Clamp Kinematics and Dynamics for Operating Safety

2010 ◽  
Vol 97-101 ◽  
pp. 3376-3381
Author(s):  
Jian Xiong Liu ◽  
Sheng Jun Li ◽  
Jun Tao Peng ◽  
Jian Mei Liu
Keyword(s):  
Working Conditions ◽  
Virtual Prototype ◽  
Analytical Investigation ◽  
Kinematics And Dynamics ◽  
Clamping Force ◽  
Wide Spread ◽  
Working Process ◽  
Steel Coil ◽  
Solid Edge ◽  
Safe Working

Vertical clamps are representative large-capacity metallurgical lifting tool and wide spread employed to lift and to convey vertical cold or hot rolling steel coil of strip. To ensure absolute safety, the kinematics model of the vertical clamp was built, and its virtual prototype was established on Solid Edge, and the working process was simulated based on ADAMS environment. To explain the establishing mode of clamping force, the dynamic positive feedback working process of clamping was discussed. The correctness of simulation was validated by means of analytical investigation. The safe working conditions of vertical clamp were obtained.

Effect of the Gel Coat Composition on the Tensile Strength for Glass Fibre Reinforced Polyester Composites

2015 ◽  
Vol 1125 ◽  
pp. 79-83 ◽  
Author(s):  
Ahmad ◽  
M.R. Abdullah ◽  
Ab. Saman Abd Kadir
Keyword(s):  
Tensile Strength ◽  
Comparative Analysis ◽  
Glass Fibre ◽  
Gfrp Composites ◽  
Composite Surface ◽  
A Value ◽  
Before And After ◽  
Glass Fibre Reinforced ◽  
Polyester Composites ◽  
The Difference

In this study, the effect of the gel coat composition on tensile strength of glass fibre reinforced polyester (GFRP) composites was evaluated. The experiments were conducted on various gel coat composition and time. Samples were immersed in sea and river water for 6 months to investigate the differences in tensile strength. Optical observation using SEM on the composites surface and comparative analysis in terms of tensile strength were used before and after immersing. As results, the most excellent tensile strength was the gel coat composition consisting of 0.3 kg of reolosil QS-102 with 10 kg of resin SHCP 268BQTN with a value of 51.9 MPa. Tensile strength reduced about 33.4 % compared to other sample where reduced to 46.3401 %. The difference in the composite surface as a result of immersion process on each sample was also discussed in this paper.

Care Workers in Argentina

2017 ◽  
Vol 27 (4) ◽  
pp. 462-482
Author(s):  
Valeria Esquivel ◽  
Francisca Pereyra
Keyword(s):  
Comparative Analysis ◽  
Working Conditions ◽  
Early Education ◽  
Domestic Workers ◽  
State Policies ◽  
Social Standing ◽  
Relative Wages ◽  
Care Workers ◽  
Feminized Occupations

The working conditions, relative wages, and social standing of care occupations are the result of diverse causes that can worsen, improve, or neutralize the labor disadvantages usually found in care occupations. This article seeks to provide a perspective on the factors underlying care workers’ working conditions in Argentina. It presents a comparative analysis of three highly feminized occupations—early education teachers, nurses, and domestic workers. After highlighting the different working conditions among these occupations, the paper focuses on the critically important role that unionization and state policies have played in defining each labor context in Argentina. The analysis shows how workers’ evaluation of their occupation and working conditions are fundamentally shaped by these two variables.

Molecular dynamics study on the tensile properties of graphene/Cu nanocomposite

2017 ◽  
Vol 06 (03) ◽  
pp. 1750021 ◽  
Author(s):  
Jun Hua ◽  
Zhirong Duan ◽  
Chen Song ◽  
Qinlong Liu
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Comparative Analysis ◽  
Strain Rate ◽  
Ultimate Strength ◽  
Strain Rates ◽  
Single Crystal Copper ◽  
Single Slice

In this paper, the mechanical properties, including elastic properties, deformation mechanism, dislocation formation and crack propagation of graphene/Cu (G/Cu) nanocomposite under uniaxial tension are studied by molecular dynamics (MD) method and the strain rate dependence is also investigated. Firstly, through the comparative analysis of tensile results of single crystal copper (Cu), single slice graphene/Cu (SSG/Cu) nanocomposite and double slice graphene/Cu (DSG/Cu) nanocomposite, it is found that the G/Cu nanocomposites have larger initial equivalent elastic modulus and tensile ultimate strength comparing with Cu and the more content of graphene, the greater the tensile strength of composites. Afterwards, by analyzing the tensile results of SSG/Cu nanocomposite under different strain rates, we find that the tensile ultimate strength of SSG/Cu nanocomposite increases with the increasing of strain rate gradually, but the initial equivalent elastic modulus basically remains unchanged.

Static Analysis and Optimization of the Slide’s Structure of Slider-Crank Type Cluster well Pumping Unit(SCTCWPU)

2013 ◽  
Vol 694-697 ◽  
pp. 284-287
Author(s):  
Wen Sun ◽  
San Min Wang ◽  
Tao Ren ◽  
Wen Tao Qu
Keyword(s):  
Comparative Analysis ◽  
Static Analysis ◽  
Working Conditions ◽  
Friction And Wear ◽  
Main Mechanism ◽  
The Core ◽  
Pumping Unit ◽  
Major Factors ◽  
Core Problem ◽  
Crank Mechanism

Centric slider-crank mechanism forms the main mechanism of slider-crank type cluster well pumping unit(SCTCWPU). The friction and wear is the core problem of (SCTCWPU). The pressure of the slide upon the rail is one of the major factors of the friction and wear between the roller and rail.This paper presents the static analysis and optimization of the structure of the slide. In addition,a comparative analysis of the two types of the slide’s structure is made on the basis of actual working conditions.

Investigation of a Double-Arched Bridges Mechanical Behavior by the Static Load Test

2014 ◽  
Vol 501-504 ◽  
pp. 1297-1300
Author(s):  
Hai Yun Huang ◽  
Jun Ping Zhang
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Working Conditions ◽  
Static Load ◽  
Element Model ◽  
Load Test ◽  
Structural Deformation ◽  
Static Load Test ◽  
Load Bearing Capacity ◽  
Calculation Results

An on-site static load test of a reinforced concrete double-arch bridge with fracture is carried out, and a comparative analysis of the measured experimental results of the bridge working conditions and the calculation results of Midas/civil Finite Element Model is performed. The results show that the performance and structural deformation recoverability of the bridge is weak. The bridges overall load-bearing capacity does not satisfy its designed requirements.

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