scholarly journals Regression Analysis of Small Strain Shear and Constrained Modulus Measurements on Sands with Fines: Effect of Different Void Ratio Functions Used

2018 ◽  
Vol 26 (4) ◽  
pp. 11-19
Author(s):  
Jakub Panuška ◽  
Jana Frankovská
Keyword(s):  
Regression Analysis ◽  
Void Ratio ◽  
Additional Data ◽  
Pannonian Basin ◽  
Small Strain ◽  
Regression Procedure ◽  
Acceptable Range ◽  
Constant Regression ◽  
Constrained Modulus ◽  
And Behavior

Abstract The article is focused on a regression analysis of small strain shear and constrained modulus measurements of 15 different natural sands with plastic fines from the Pannonian basin. Measurements done within this work are supported by additional data on sands with plastic and non-plastic fines gathered from the literature in order to demonstrate the versatility of the approaches used and behavior observed. Bender / extender element techniques are used in this study for measuring the small strain shear and constrained modulus of sands with fines. Three void ratio functions, which are commonly used in predictive empirical equations for predicting small strain stiffness, with corresponding fitted parameters are presented, and their effect on the accuracy of the regression procedure is studied. It is assumed that all the void ratio functions tested provide nearly the same degree of accuracy and that the fitted models are able to predict the values of the parameters measured within an acceptable range of errors. Finally, proposed constant regression constants for sands with plastic fines are given.

Small to intermediate strain properties of fly ashes with various carbon and biomass contents

2016 ◽  
Vol 53 (1) ◽  
pp. 35-48 ◽  
Author(s):  
H. Choo ◽  
N.N. Yeboah ◽  
S.E. Burns
Keyword(s):  
Void Ratio ◽  
Small Strain ◽  
Interparticle Contact ◽  
Bender Elements ◽  
Fly Ashes ◽  
Small Strain Stiffness ◽  
Initial Void Ratio ◽  
Constrained Modulus ◽  
Stiffness Anisotropy ◽  
Biomass Particles

High-carbon-content fly ashes with biomass particles are typically landfilled in accordance with the ASTM C618 regulation. To quantify their geotechnical properties relating to storage and disposal, this study evaluates the small to intermediate strain properties of fly ashes with various carbon and biomass contents. Tested fly ashes had carbon contents ranging from 1.1% to 9.6%, resulting from co-combusting coal with biomass (biomass contents ranging from 0% to 8.2% by weight). The small-strain stiffness and intermediate-strain constrained modulus were evaluated using consolidation tests performed in a modified oedometer cell equipped with bender elements. It was found that initial void ratio governed the compressibility (or constrained modulus) of fly ashes, and with an increase in carbon and biomass contents, the small-strain stiffness of fly ashes decreased due to the decrease in number of direct contacts between microspheres. In addition, the interfine void ratio, ef, was employed instead of global void ratio to capture the alteration of interparticle contact or interparticle coordination between microspheres, due to the change in carbon and biomass contents. Finally, the stiffness in an overconsolidated state and the stiffness anisotropy of fly ashes were evaluated.

Differentiation and Interrelations of Two Representatives of Laudakia stellio Complex (Reptilia: Agamidae) in Israel

2011 ◽  
Vol 4 (2) ◽  
pp. 102-114 ◽  
Author(s):  
Evgenyi N. Panov ◽  
Larissa Yu. Zykova
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Habitat Preference ◽  
Additional Data ◽  
Near East ◽  
Field Studies ◽  
Subspecies Level ◽  
Limited Gene Flow ◽  
Study Sites ◽  
And Behavior

Field studies were conducted in Central Negev within the breeding range of Laudakia stellio brachydactyla and in NE Israel (Qyriat Shemona) in the range of an unnamed form (tentatively “Near-East Rock Agama”), during March – May 1996. Additional data have been collected in Jerusalem at a distance of ca. 110 km from the first and about 170 km from the second study sites. A total of 63 individuals were caught and examined. The animals were marked and their subsequent movements were followed. Social and signal behavior of both forms were described and compared. Lizards from Negev and Qyriat Shemona differ from each other sharply in external morphology, habitat preference, population structure, and behavior. The differences obviously exceed the subspecies level. At the same time, the lizards from Jerusalem tend to be intermediate morphologically between those from both above-named localities, which permits admitting the existence of a limited gene flow between lizard populations of Negev and northern Israel. The lizards from NE Israel apparently do not belong to the nominate subspecies of L. stellio and should be regarded as one more subspecies within the species.

Effect of RAP Source on Compactability and Behavior of Cold-Recycled Mixtures in the Small Strain Domain

2021 ◽  
Vol 33 (4) ◽  
pp. 04021030
Author(s):  
Simone Raschia ◽  
Taher Baghaee Moghaddam ◽  
Daniel Perraton ◽  
Hassan Baaj ◽  
Alan Carter ◽  
...  
Keyword(s):  
Small Strain ◽  
And Behavior

scholarly journals Organizational Development Towards Excellent Management

2018 ◽  
pp. 254-257
Keyword(s):  
Regression Analysis ◽  
Standard Deviation ◽  
Organizational Development ◽  
Assessment Model ◽  
Survey Method ◽  
Significant Difference ◽  
Before And After ◽  
Level Of Knowledge ◽  
And Behavior ◽  
Percentage Standard Deviation

This study will use the Kirkpatrick Assessment Model to assess the School Excellence program through Organization Development (PrOD). This model involves evaluation of reactions, learning (knowledge, skills and attitude), behavior and outcomes, but this study only assesses knowledge and behavior . This study uses survey method by involving 120 respondents of the study chosen by group sampling. The instrument is a questionnaire that has Cronbach Alpha value between 0.930-0.984. The data were analyzed using mean score, percentage, standard deviation and regression. Analysis findings show that there is a significant difference between the level of knowledge and behavior before and after the PrOD. Overall, this study recommends PrOD to be continued, but it is necessary to improve in the formulation of PrOD syllabus so that school leaders can improve the behavior change in meaningful and meaningful implementation of the PrOD.

scholarly journals Experimental Investigation on Small-Strain Stiffness of Marine Silty Sand

2020 ◽  
Vol 8 (5) ◽  
pp. 360 ◽  
Author(s):  
Qi Wu ◽  
Qingrui Lu ◽  
Qizhou Guo ◽  
Kai Zhao ◽  
Pen Chen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Void Ratio ◽  
Reduction Rate ◽  
Confining Pressure ◽  
Small Strain ◽  
Silty Sand ◽  
Bender Element ◽  
Small Strain Stiffness ◽  
Alternative State ◽  
State Index

The significance of small-strain stiffness (Gmax) of saturated composite soils are still of great concern in practice, due to the complex influence of fines on soil fabric. This paper presents an experimental investigation conducted through comprehensive bender element tests on Gmax of marine silty sand. Special attention is paid to the influence of initial effective confining pressure ( σ c 0 ′ ), global void ratio (e) and fines content (FC) on Gmax of a marine silty sand. The results indicate that under otherwise similar conditions, Gmax decreases with decreasing e or FC, but decreases with increasing FC. In addition, the reduction rate of Gmax with e increasing is not sensitive to σ c 0 ′ , but obviously sensitive to changes in FC. The equivalent skeleton void ratio (e*) is introduced as an alternative state index for silty sand with various FC, based on the concept of binary packing material. Remarkably, the Hardin model is modified with the new state index e*, allowing unified characterization of Gmax values for silty sand with various FC, e, and σ c 0 ′ . Independent test data for different silty sand published in the literature calibrate the applicability of this proposed model.

Sand–rubber mixtures (large rubber chips)

2008 ◽  
Vol 45 (10) ◽  
pp. 1457-1466 ◽  
Author(s):  
H.-K. Kim ◽  
J. C. Santamarina
Keyword(s):  
Volume Fraction ◽  
High Stress ◽  
Small Strain ◽  
Lateral Strain ◽  
Power Functions ◽  
Volume Fractions ◽  
Constrained Modulus ◽  
Rubber Particles ◽  
Sand Particles ◽  
Soft Rubber

Mixtures of small rigid sand particles Ds and large soft rubber particles Dr are prepared at different volume fractions and tested to investigate their small-strain and zero-lateral strain responses (Dr /Ds ≈ 10). Both data sets are simultaneously gathered in an oedometer cell instrumented with bender elements. Data are analyzed in the context of mixture theory and with the aid of numerical simulations. Results show that the sand skeleton controls the mixture response when the volume fraction of rubber particles is Vrubber ≤ 0.3, while the rubber skeleton prevails at Vrubber ≥ 0.6. The large size and incompressibility of rubber particles provides high stress-induced stiffness in the sand skeleton near the equatorial plane of rubber particles. The corresponding increase in local small-strain shear modulus Gmax results in earlier wave arrivals in mixtures with Vrubber ≤ 0.3 than in pure sand, while the quasi-static constrained modulus is highest in pure sand. The constrained modulus and shear wave velocity are power functions of the applied effective stress in all mixtures. Results from this study (Dr /Ds ≈ 10) and from a previous complementary study with small rubber particles (Dr /Ds = 0.25) show that the development of internal fabric, particle level processes, and the associated macroscale response of sand–rubber mixtures depend on the relative size between the soft rubber chips and the stiff sand particles Dr /Ds and their volume fractions.

scholarly journals Quantum Similarity in our DNA, and in DNA Storage

2021 ◽  
Author(s):  
Andrew M. K. Nassief
Keyword(s):  
Regression Analysis ◽  
Theoretical Physics ◽  
Quantum Similarity ◽  
Quantum Biology ◽  
Constant Regression ◽  
Dna Storage ◽  
Dna Strands ◽  
Mathematical Formulas ◽  
Computational Form ◽  
The Way

The usage of Quantum Similarity through the equation Z = {∀θ ∈ Z → ∃s ∈ S ∧ ∃t ∈ T : θ = (s, t)}, represents a way to analyze the way communication works in our DNA. Being able to create the object set reference for z being (s, t) in our DNA strands, we are able to set logical tags and representations of our DNA in a completely computational form. This will allow us to have a better understanding of the sequences that happen in our DNA. With this approach, we can also utilize mathematical formulas such as the Euler–Mascheroni constant, regression analysis, and computational proofs to answer important questions on Quantum biology, Quantum similarity, and Theoretical Physics.

scholarly journals PENGARUH POLA KONSUMSI ISLAMI TERHADAP PRESTASI AKADEMIK PADA MAHASISWA FAKULTAS EKONOMI DAN BISNIS UNIVERSITAS MALIKUSSALEH

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Damanhur Damanhur ◽  
Rahmatullah Rahmatullah
Keyword(s):  
Academic Achievement ◽  
Regression Analysis ◽  
Data Analysis ◽  
Empirical Evidence ◽  
Primary Data ◽  
Business Faculty ◽  
Life Activity ◽  
And Behavior ◽  
Positive Effect

The pattern of Islamic Consumption is the most important part of a Muslim’s life, because it distinguishes between Muslims and non-Muslims. As a Muslim not all of the foods can be consumed, there are rules and bans that bind in it so that it has effect to its life activity in this world. The purpose of this study is to obtain the empirical evidence that the pattern of Islamic Consumption affects simultaneously on Academic Achievement. This study uses primary data. The population of this study are students of the Economics and Business Faculty University of Malikussaleh who are Muslim and there are 90 respondents in 2015. The method of selecting the sample of this study is by using slovin method. The data analysis using regression analysis. The results of the study showed that the pattern of Islamic Consumption has a positive effect on Academic Achievement, it proved by a significance value of 0.0045 0.05 which means the hypothesis in this study rejected H0 and received Ha. Most of the respondents showed good results on each question between the attitude and behavior of Islamic consumption.

scholarly journals Analisis Faktor-faktor yang Mempengaruhi Produktivitas Kerja Karyawan di PT. Multi Terminal Indonesia

2021 ◽  
Vol 23 (2) ◽  
pp. 167-178
Author(s):  
Retno Ayu Hastuti ◽  
Tri Bodroastuti ◽  
Tantri Widiastuti
Keyword(s):  
Regression Analysis ◽  
Linear Regression Analysis ◽  
Work Productivity ◽  
Multiple Linear Regression Analysis ◽  
Analytical Tool ◽  
Coefficient Of Determination ◽  
Research Model ◽  
And Behavior ◽  
Attitudes And Behavior

Work productivity is the ability to carry out activities that produce an output or work in accordance with the quality set, but often there are obstacles that cause the company's goals to be less achieved. Every company has a different policy on efficient sourcing. The purpose of this study was to determine and analyze how the effect of knowledge, skills, abilities, attitudes and behavior on work productivity of PT. Multi Terminal Indonesia. The population in this study were 30 employees and the entire population was sampled. The analytical tool used in this research was Multiple Linear Regression Analysis. The results showed that knowledge (X1), skills (X2), abilities (X3), behaviors (X5) had no effect on work productivity. The attitude (X4) had an effect on work productivity. The results of simultaneous hypothesis testing explained that knowledge (X1), skills (X2), abilities (X3), attitudes (X4) and behavior (X5) haved an effect on work productivity. The coefficient of determination of 0.636 means that knowledge, skills, abilities, attitudes and behavior are able to explain work productivity by 63.6%. The remaining 36.4% is explained by other variables not included in this research model.

Sign in / Sign up

Export Citation Format

Share Document