scholarly journals Swelling Clay Parameters Investigation Using Design of Experiments (A Case Study)

2021 ◽  
Author(s):  
Yacine Berrah ◽  
Serhane Brahmi ◽  
Nouar Charef ◽  
Abderrahman Boumezbeur
Keyword(s):  
Design Of Experiments ◽  
Swelling Pressure ◽  
Unit Weight ◽  
Factor Screening ◽  
Statistical Tool ◽  
Factors Affecting ◽  
Screening Design ◽  
Expansion Behavior ◽  
Prone Area ◽  
Parametric Effects

The present paper aims to investigate geotechnical parametric effects on the expansion behavior of clayey soils in Tebessa province northeast of Algeria using the Design Of Experiments (DOE) methodology. It has been used as powerful tools based on physical and mechanical properties, data results obtained within laboratory soil mechanics testing. This statistical tool methodology presents the factor screening design to determine the effect of different parameters such as dry unit weight, saturation degree, water content, plasticity index, etc., on the swelling pressure parameter which can be used as expansion behavior of clay indicator. All data previously collected in the studied prone area allows the ability of detailed analysis using design of experiment and parametric optimization process with response surface methodology (RSM). Each variable that present effects on swelling pressure is also discussed. Besides, the obtained models and equations related the factors affecting the expansion process have been determined. At the output process; the response desirability of the screening design methodology can be optimized by maximization or minimization of the optimal values affecting the swelling behavior. This process allows us to find the best describing models, whereas output results may be compared to empirical laboratory tests results to assess the RSM models.

scholarly journals Pulsed Flow Turbine Design Recommendations

2021 ◽  
Vol 6 (3) ◽  
pp. 24
Author(s):  
Florian Hermet ◽  
Nicolas Binder ◽  
Jérémie Gressier ◽  
Gonzalo Sáez-Mischlich
Keyword(s):  
Design Of Experiments ◽  
Performance Indicator ◽  
Influential Factors ◽  
Factor Level ◽  
Viscous Effects ◽  
Inviscid Flows ◽  
Screening Design ◽  
Pulsed Flow ◽  
Number Of Factors ◽  
Turbine Design

A preliminary analysis of turbine design, fit for pulsed flow, is proposed in this paper. It focuses on an academic 2D configuration using inviscid flows, since pressure loads due to wave propagation are several orders of magnitude higher than friction and viscous effects do not significantly impinge on the inviscid part, as previously shown by Hermet, 2021. As such, a large parametric study was carried out using the design of experiments methodology. A performance indicator adapted to unsteady environment is carefully defined before detailing the factors chosen for the design of experiments. Since the number of factors is substantial, a screening design to identify the factors influence on the output is first established. The non-influential factors are then omitted in a more quantitative study of the output law. The surface response calculation allows determining the factor level favouring the best output. Consequently, the main trends in the turbine design driven by a pulsed flow can be stated.

scholarly journals Study of the swelling pressure of coals and coal charges in the coking process

2021 ◽  
Vol 303 ◽  
pp. 01053
Author(s):  
Tatiana Cherkasova ◽  
Nikita Krasulin ◽  
Aleksandr Nevedrov ◽  
Andrey Papin ◽  
Sergey Subbotin
Keyword(s):  
Quality Indicators ◽  
Swelling Pressure ◽  
Coke Production ◽  
Coke Furnace ◽  
Coal Quality ◽  
Plastic Properties ◽  
Plant Laboratory ◽  
Factors Affecting ◽  
Central Plant Laboratory ◽  
The Relationship

The maintenance of furnaces is one of the most important problems for by-product coke production. Swelling pressure is one of the least studied factors affecting the lining of coke furnace walls. The results of studies of the swelling pressure of PJSC “Koks” feedstock coal are presented in this paper. Research has been carried out to identify the dependence of the swelling pressure on the coal quality indicators, estimated during the incoming control of the central plant laboratory of PJSC “Koks”. The plastic properties of PJSC “Koks” feedstock coals were studied using Gieseler plastometer. The relationship between the swelling pressure and the maximum coal fluidity is revealed.

New Trends in the Professional Training of Young People in the Modern Conditions

2021 ◽  
Vol 2 (60) ◽  
Author(s):  
Saule Kaliyeva ◽  
Elvira Buitek ◽  
Marziya Мeldakhanova
Keyword(s):  
Labor Market ◽  
Professional Training ◽  
Structural Changes ◽  
Technological Factor ◽  
Theoretical Research ◽  
Vocational Education And Training ◽  
Statistical Tool ◽  
Factors Affecting ◽  
The Republic ◽  
Labor Resources

The transformation of the importance of vocational education and training, the determining the development trajectories occur due to the structural changes that are under the influence of technological factor changes. Especially, digitalization, automation, robotics, the artificial intelligence, the transition to industry 4.0, the changing nature of consumer demand directly affect the restructuring of the labor market. The listed factors accelerate the development of new professions in demanded areas and the disappearance of outdated ones, they stimulate the improvement of needed skills and meet the modern requirements from employers for educationalщl programs. The purpose of research paper is to identify the new trends in the training of competitive young employees, taking into account the conditions of digitalization of economy The research methodology includes general scientific and theoretical research methods. Methods of tabular representation of data is used as statistical tool. Originality of the research is that It is relevant and necessary to develop new model of training young specialists, involving the implementation of educational, research, innovative and entrepreneurial, spiritual and moral activities that meet modern trends. Authors carried out the analysis of the level and quality of training of national personnel in terms of ensuring the future needs of the labor market of the Republic of Kazakhstan in the conditions of digitalization of economy. It includes the factors affecting the reproduction of competitive national personnel and their provision with high-quality jobs, identifying new trends in the training and retraining of professional personnel and improving their skills, examining the features of training competitive national personnel in the system of ensuring the balance of labor resources and jobs.  The paper was prepared within the grant project of the Ministry of Education and Science of the Republic of Kazakhstan AP09260584 «Employment restructuration in Kazakhstan in terms of social and economic tensions».

Design of Experiments in an Electrochemical Process

2020 ◽  
pp. 1-32
Author(s):  
Guadalupe Hernández-Escobedo ◽  
Jesus Ivan Alaniz-Muñoz ◽  
Arturo Realyvásquez-Vargas ◽  
Karina Cecilia Arredondo-Soto
Keyword(s):  
Design Of Experiments ◽  
Electrical Signal ◽  
Electrochemical Process ◽  
Production Costs ◽  
Homogeneous Distribution ◽  
Electric Response ◽  
Factors Affecting ◽  
Signal Characteristics ◽  
Object Of Study ◽  
A Company

This chapter applies design of experiments to improve plating performance and better practices in an electrochemical process within a company making electronic components. Specifically, the electroplated process of a metal housing served as the object of study. This process consists of plating an aluminum housing with silver (Ag) to improve the electrical signal characteristics and properties. It includes multiple factors affecting the process, which are clearly seen in the diverse failures such as electric response, pollution by solid waste, among others. These directly impact production costs and delivery time. To minimize the mentioned failures, diverse critical factors were enlisted discovering that the principal problem is the homogeneous distribution of the final finish of the commented product. Particularly, the final finish is realized with silver so it directly affects the electric response as final quality test.

scholarly journals Factors Affecting Project Based Learning Intention of Engineering Students

SCITECH Nepal ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. 1-8
Author(s):  
Madan Raj Chapagain
Keyword(s):  
Engineering Students ◽  
Project Based Learning ◽  
Male Students ◽  
Primary Data ◽  
Cross Sectional Survey ◽  
Statistical Tool ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Learning Intention ◽  
Perception Of Self

The factors affecting the project-based learning intention (PjBLI) of engineering students have been studied using theory of planned behaviour (TPB). Descriptive study was carried out utilizing quantitative technique. Primary data were collected through cross sectional survey, utilizing seven point Likert  scaled  questionnaire. The respondents were final year students of Nepal Engineering College. Statistical tool (SPSS) was used for analysis. The result shows that the levels of both the PjBLI and the attitude of students (ATTI) towards project-based learning (PjBL) are high followed by the level of perceived behavioural control (BC). However, the level of subjective norm (SN) is relatively lower. There are no significant differences in PjBLI, ATTI, SN and BC among students from different departments. However the BC (perception of self efficacy or capability) of female students is higher than that of male students. Regression analysis shows that 42.2 and 19.3 percentages of PjBLI are affected by SN and ATTI respectively. The study concludes that additional effort is essential to improve SN (support from project supervisor; department and colleague) which in turn helps to improve PjBLI of students and their performance.

Some factors affecting compacted clay swelling

1970 ◽  
Vol 7 (1) ◽  
pp. 79-91 ◽  
Author(s):  
A. Yevnin ◽  
D. Zaslavsky
Keyword(s):  
Moisture Content ◽  
Volume Change ◽  
Empirical Equation ◽  
Clay Soil ◽  
Initial Density ◽  
Initial Moisture Content ◽  
Swelling Pressure ◽  
Compacted Clay ◽  
Factors Affecting ◽  
Applied Loading

Volume change after saturation was determined on specimens of a statically compacted clay soil. It was found that density after swelling increases linearly with increasing initial density, initial moisture content, and increasing logarithm of applied loading pressure. An empirical equation with five coefficients and a constant, found with the aid of a computer, represents the results with a coefficient of correlation close to 1. An equation for the swelling pressure was also obtained from this equation. Results of specimens which consolidated did not fit the lines obtained for swelling. The relationships obtained were explained by the influence of particle reorientation and moisture content on swelling tendency.

scholarly journals PENGARUH KOMPETENSI MANDOR TERHADAP KUALITAS PELAKSANAAN KONTRUKSI GEDUNG DI MALANG RAYA

2014 ◽  
Vol 10 (2) ◽  
Author(s):  
Hariyono Seputro Youngky Pratama ◽  
Sri Murni Dewi ◽  
Ruslin Anwar
Keyword(s):  
Structural Equation ◽  
Sampling Technique ◽  
Equation Model ◽  
Building Construction ◽  
Building Performance ◽  
Statistical Tool ◽  
Factors Affecting ◽  
Relationship Of ◽  
The Relationship

Hariyono Seputro Youngky Pratama1, Sri Murni Dewi2 & Ruslin Anwar31, 2 & 3Jurusan Teknik Sipil, Fakultas Teknik, Universitas Brawijaya MalangAlamat Korspondensi: Jl.MT. Haryono 167, Malang 65145, IndonesiaE-mail: [email protected] purpose of this study was: (1) to analyze the factors that affect the competence of foremanon the quality of construction of the building performance in Malang. (2) to know the relationship ofvariables that affect the competence of supervisors on the performance of the quality of buildingconstruction in Malang. The research was carried out on several samples of foreman in Malang.The sampling technique used is the judgmental technique (purposive). The statistical tool used inthis study is Structural Equation Model (SEM) to determine the relationship of variables that affectthe foreman’s competence on the quality of construction of the building performance in Malang.The analysis showed that foreman’s competency factors affecting the performance of thequality of building construction in Malang are competency skills, personal and management. Fromthe result of this research noted that there is a significant effect between skills variables, personalvariables and management variable on the quality of buildings construction in Malang. Based onthese result, it is advisable to conduct further research for other types of work that can be seen inmore depth the competence of foreman.Keywords: foreman competence, quality of building construction

scholarly journals Application of Plackett-Burman design for screening of factors affecting pitavastatin nanoparticle formulation development

Folia Medica ◽  
2021 ◽  
Vol 63 (5) ◽  
pp. 775-785
Author(s):  
Vinodkumar D. Ramani ◽  
Girish K. Jani ◽  
Girish U. Sailor
Keyword(s):  
Particle Size ◽  
Influential Factors ◽  
Polydispersity Index ◽  
Formulation Development ◽  
Relative Significance ◽  
Factors Affecting ◽  
Screening Design ◽  
Burman Design ◽  
Nanoparticle Formulation ◽  
Plackett Burman Design

Introduction: Nanoparticle formulation of pitavastatin calcium is a potential alternative to solve the solubility related problem. However, the formulation of nanoparticle involves various parameters that affect product quality. Plackett-Burman design could facilitate an economical experimental plan that focuses on determining the relative significance of many. Aim: The objective of this study was to screen the variables which could significantly affect the pitavastatin nanoparticle formulation. Materials and methods: The pitavastatin nanoparticles were formulated by preparing nanosuspension using the emulsion solvent evaporation technique followed by freeze-drying. A Plackett-Burman screening design methodology was employed in which seven factors at two levels were tested at 12 runs to study the effect of formulation and process variables on particle size and polydispersity index of nanoparticles. The surface morphology and crystalline nature of nanoparticle were also evaluated. Results: The particle size and polydispersity index of nanosuspension was found in the range of 113.1 to 768.5 nm and 0.068 to 0.508, respectively. Statistical analysis of various variables revealed that stabilizer concentration, injection flow rate, and stirring rate were the most influential factors affecting the particle size and polydispersity index of the formulation. X-ray diffraction (XRD) and scanning electron microscopy (SEM) study suggested the amorphous nature of nanoparticles. Conclusions: This study concluded that the Plackett-Burman design was an efficient tool for screening the process and formulation variables affecting the properties of pitavastatin nanoparticles and also for the identification of the most prominent factor.

scholarly journals Tribology of The Sock-Skin Interface – The Influence of Different Fabric Parameters On Sock Friction

2021 ◽  
Author(s):  
Ian DeBois ◽  
Esha Agarwal ◽  
Ashish Kapoor ◽  
Kavita Mathur
Keyword(s):  
Design Of Experiments ◽  
Frictional Force ◽  
Cotton Fiber ◽  
Linear Density ◽  
Parametric Design ◽  
Bottom Surface ◽  
Factors Affecting ◽  
Fiber Composition ◽  
Friction Testing ◽  
Single Jersey

Abstract The purpose of this parametric design of experiments was to identify and summarize how the influence of knit structure (single jersey vs. terry), fiber composition (polyester vs. cotton), fiber linear density (30/1 Ne vs. 18/1 Ne & 1/150/34 vs. 2/150/34), and yarn type (filament vs. spun) affected the frictional profile across the sock-skin interface, and then relate these factors to friction blister incidence. Friction testing trials were completed against both a polypropylene probe and a synthetic skin material (Lorica soft®) to determine if there was a difference in friction based on interface interaction. Friction testing was completed by sliding a probe across the inside bottom surface of the sock (the part that is usually in-contact with the bottom of the foot) while instantaneously measuring the frictional force every tenth of a second. For both trials (plastic probe and synthetic skin), in the dry condition, knit structure was found to be the most prominate fabric parameter affecting the frictional force experienced at the sock-skin interface. It was also determined that fiber linear density, and yarn type are tertiary factors affecting the frictional force measured at the sock-skin interface. Finally, in the dry state, it was determined that fiber composition had seemingly no effect on the frictional force experienced at the sock-skin interface.

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