Invariance Considerations in Large Strain Elasto-Plasticity

1986 ◽  
Vol 53 (1) ◽  
pp. 55-60 ◽  
Author(s):  
P. A. Dashner
Keyword(s):  
Large Strain ◽  
Deformation Gradient ◽  
Rotational Invariance ◽  
Rotational Component ◽  
Microstructural Characteristics ◽  
Ongoing Debate ◽  
Anisotropic Crystal ◽  
Elasto Plasticity ◽  
Definition Of ◽  
Material Frame

This paper addresses a number of issues in the ongoing debate over the relevance and/or appropriateness of the rotational invariance requirement which is generally associated with the intermediate unstressed configuration. In particular, it is argued that the principle of material frame invariance has been “misapplied” by the proponents of full rotational invariance. Insistence on a strictly “kinematic” interpretation of the deformation gradient (F = FeFp) constituents Fe and Fp justifies elimination of the plastic rotational component Rp(Fp = RpUp) based on the principle of determinism for stress — not invariance of frame. However, simple physical considerations, including a physical example involving a “structurally anisotropic” crystal, suggest that a more intricate definition of the gradient constituents is required in order to adequately account for microstructural characteristics. These considerations suggest alternative definitions for the gradient constituents Fe and Fp with associated constitutive invariance requirements.

An Objective Approach Toward Understanding Auditory Processing Disorder

2021 ◽  
pp. 1-6
Author(s):  
Akshay R. Maggu ◽  
Tobias Overath
Keyword(s):  
Clinical Practice ◽  
Auditory Processing ◽  
Test Battery ◽  
Domain Specificity ◽  
Auditory Processing Disorder ◽  
Theoretical Construct ◽  
Ongoing Debate ◽  
Current Definition ◽  
Definition Of ◽  
Shed Light

Purpose In the field of audiology, auditory processing disorder (APD) continues to be a topic of ongoing debate for clinicians and scientists alike, both in terms of theory and clinical practice. In the current viewpoint, we first lay out the main issues that are central to the controversy surrounding APD, and then suggest a framework toward their resolution. Method The current viewpoint is informed by reviewing existing studies in the field of APD to better understand the issues contributing to the controversies in APD. Results We found that, within the current definition of APD, the two main issues that make the APD diagnosis controversial are (a) comorbidity with other disorders and (b) the lack of domain specificity. These issues remain unresolved, especially with the use of the existing behavioral APD test batteries. In this viewpoint, we shed light on how they can be mitigated by implementing the administration of an objective, physiological test battery. Conclusions By administering an objective test battery, as proposed in this viewpoint, we believe that it will be possible to achieve a higher degree of specificity to the auditory domain that will not only contribute towards clinical practice but also contribute towards strengthening APD as a theoretical construct.

Health Professionals' Attitude toward Euthanasia: A Cross-Sectional Study from Turkey

2007 ◽  
Vol 54 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Ahmet Turla ◽  
Erdem Özkara ◽  
Çağlar Özkanli ◽  
Nevzat Alkan
Keyword(s):  
Health Professionals ◽  
Cross Sectional Study ◽  
The Other ◽  
The Black Sea ◽  
Medical Doctors ◽  
Sectional Study ◽  
Ongoing Debate ◽  
Cross Sectional ◽  
Black Sea Region ◽  
Definition Of

There is an ongoing debate on the definition of euthanasia and attempts to change laws about euthanasia and its practice in many countries. It is the medical doctors and the other health professionals who will elucidate the issue. Therefore, we performed this study to reveal attitude of Turkish health professionals toward euthanasia. This is an observational and cross-sectional study and data were collected with a questionnaire. The questionnaire was distributed to 545 health professionals in Samsun, a city in the Black Sea Region in Turkey. Data were analyzed with SPSS package programs. Of all health professionals included in the study, 43.5% were medical doctors and 45.5% auxiliary health professionals. Of all participants, 33.6% did not object to euthanasia and 7.9% were asked to perform euthanasia. Eighty point seven percent of the participants noted that euthanasia could be abused even if a euthanasia law were passed. It can be concluded that the health professionals should have a chance to discuss euthanasia and that their attitude toward and their expectations and worries about euthanasia should be taken into account when a euthanasia law is drafted.

scholarly journals The Invisible Population of Students With Learning Disabilities in South Korea

2020 ◽  
Author(s):  
Mikyung Shin ◽  
Nari Choi
Keyword(s):  
Special Education ◽  
Learning Disabilities ◽  
South Korea ◽  
Students With Learning Disabilities ◽  
Ongoing Debate ◽  
Future Directions ◽  
Definition Of ◽  
Education Support ◽  
The Invisible

Over the last decade, there has been a rapidly declining trend in the prevalence of students with learning disabilities in South Korea. In 2019, only 1.5% of students receiving special education support were identified as having learning disabilities. This study reports on three current issues related to learning disabilities to provide a greater understanding of this declining trend in South Korea: the ongoing debate on the definition of students with learning disabilities, the continuing disagreement on the identification criteria for students with learning disabilities, and the public’s limited understanding of learning disabilities. Suggestions for future directions are also discussed.

scholarly journals Pan-genomics: Unmasking the gene diversity hidden in the bacteria species

2014 ◽  
Author(s):  
Luis David Alcaraz
Keyword(s):  
Core Genome ◽  
Gene Diversity ◽  
Single Gene ◽  
Phenotypic Traits ◽  
Ongoing Debate ◽  
16S Rrna Sequence ◽  
Sequence Comparisons ◽  
Shared Information ◽  
Taxonomic Range ◽  
Definition Of

The dramatic increase in genome sequencing during the last years has changed our ideas about bacterial diversity, from single gene to whole community DNA surveys; we have learned that nature's lagest gene repository resides in bacteria resides in bacteria. Comparison of bacteria genomes has contributed to understand the flexibility in size and gene content as well as the gene movement due to gene family expansions and Horizontal Gene Transfer. Bacteria species are currently defined by means of 16S rRNA sequence comparisons and some limited phenotypic traits. There is an ongoing debate about the biological and evolutive significance of the bacteria species, and thus the need to refine the definition of it using the most of the genomic shared information across any taxonomic range. When comparing multiple genomes of related strains we can distinguish a set of common shared features which are known as the core genome. In the other hand, the set of strain specific genes are known as accessory genome. The accessory and core genome conform the total of the genetic composition, and are known as pan-genome. Here we present the possibilities using pan-genomics as a workhorse to describe both taxonomical and functional diversity within bacteria.

scholarly journals Pan-genomics: Unmasking the gene diversity hidden in the bacteria species

2014 ◽  
Author(s):  
Luis David Alcaraz
Keyword(s):  
Core Genome ◽  
Gene Diversity ◽  
Single Gene ◽  
Phenotypic Traits ◽  
Ongoing Debate ◽  
16S Rrna Sequence ◽  
Sequence Comparisons ◽  
Shared Information ◽  
Taxonomic Range ◽  
Definition Of

The dramatic increase in genome sequencing during the last years has changed our ideas about bacterial diversity, from single gene to whole community DNA surveys; we have learned that nature's lagest gene repository resides in bacteria resides in bacteria. Comparison of bacteria genomes has contributed to understand the flexibility in size and gene content as well as the gene movement due to gene family expansions and Horizontal Gene Transfer. Bacteria species are currently defined by means of 16S rRNA sequence comparisons and some limited phenotypic traits. There is an ongoing debate about the biological and evolutive significance of the bacteria species, and thus the need to refine the definition of it using the most of the genomic shared information across any taxonomic range. When comparing multiple genomes of related strains we can distinguish a set of common shared features which are known as the core genome. In the other hand, the set of strain specific genes are known as accessory genome. The accessory and core genome conform the total of the genetic composition, and are known as pan-genome. Here we present the possibilities using pan-genomics as a workhorse to describe both taxonomical and functional diversity within bacteria.

scholarly journals MODELING THE RHEOLOGICAL PROPERTIES OF FRESH CONCRETE USING A 3D FINITE ELEMENT MODEL

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Dragan Nikolić
Keyword(s):  
Fresh Concrete ◽  
Deformation Gradient ◽  
Element Model ◽  
Full Potential ◽  
Multiplicative Decomposition ◽  
Self Compacting Concrete ◽  
Structural Element ◽  
Casting Technique ◽  
Inelastic Material ◽  
Elasto Plasticity

During the last thirty years, concrete has been industrially mutating from a soft granular medium to a proper non-Newtonian fluid. To benefit from the full potential of the modern fluid concretes such as Self-Compacting Concrete (SCC), prediction tools of the form filling taking into account the properties of the concrete, the shape and size of the structural element and the casting technique are needed. Development of a finite deformation elasto-plasticity model based on the multiplicative decomposition of the deformation gradient is presented. The presented model in this paper includes application of inelastic material properties are specified with the Drucker Prager hardening option.

Reflective Model and Proposition Development in Talent Management

2017 ◽  
pp. 104-133
Author(s):  
Manoj Kumar
Keyword(s):  
Talent Management ◽  
Integrated Model ◽  
Future Research ◽  
Ongoing Debate ◽  
Hrm Practices ◽  
Antecedents And Consequences ◽  
Definition Of

Talent Management (TM) has received lots of attention of academics, practitioners, researchers, scholars and competitive firms in recent years, but there are many gaps left for further theoretical and empirical development. One of gap is lack of clarity of definition of TM, and the ongoing debate about whether it is merely re-packaging of already existing HRM practices or a new concept. In this context, this chapter concludes that TM practices are distinct from the traditional HRM practices. The authors have consolidated the existing literature on talent management for designing integrated model of talent management including its antecedents and consequences. The study calls future research to empirically test the derived propositions. The chapter includes various theoretical, economic, managerial and future research implications.

Hexahedral-Based Smoothed Finite Element Method Using Volumetric-Deviatoric Split for Contact Problem

2018 ◽  
Vol 940 ◽  
pp. 84-88 ◽  
Author(s):  
Kai Oshiro ◽  
Hiroka Miyakubo ◽  
Masaki Fujikawa ◽  
Chobin Makabe
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Contact Problem ◽  
Large Strain ◽  
Deformation Gradient ◽  
Deformation Analysis ◽  
Tetrahedral Elements ◽  
Incompressible Materials ◽  
Smoothed Finite Element Method ◽  
Element Method

A first-order hexahedral (H8)-element-based smoothed finite element method (S-FEM) with a volumetric-deviatoric split for nearly incompressible materials was developed for highly accurate deformation analysis of large-strain problems. In the proposed method, the isovolumetric part of the deformation gradient at the integration point is derived from F based on the beta finite element method (i.e., an S-FEM), whereas the volumetric part of the deformation gradient is derived from F on the basis of the standard FEM with reduced integration elements. This method targets H8 elements that are automatically generated from tetrahedral elements, which makes it quite practical. This is because the FE mesh can be created automatically even if the targeted object has a complex shape. This method eliminates the phenomena of volumetric and shear locking, and reduces pressure oscillations. The proposed method was implemented in the commercial FE software Abaqus and applied to the large-deformation contact problem to verify its effectiveness.

scholarly journals Targeting mucosal healing in Crohn’s disease: what the clinician needs to know

2019 ◽  
Vol 12 ◽  
pp. 175628481985686 ◽  
Author(s):  
Entcho Klenske ◽  
Christian Bojarski ◽  
Maximilian Waldner ◽  
Timo Rath ◽  
Markus F. Neurath ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Clinical Practice ◽  
Crohn's Disease ◽  
Clinical Management ◽  
Imaging Techniques ◽  
Treatment Options ◽  
Mucosal Healing ◽  
Ongoing Debate ◽  
Definition Of

In recent years, mucosal healing has emerged as a key therapeutic goal in the clinical management of patients with Crohn’s disease, as it has been associated with improved long-term clinical outcomes. With the vast improvements in endoscopic imaging techniques and the increase in available treatment options, which reportedly are able to induce mucosal healing, the practising physician is left to wonder: how is endoscopic mucosal healing exactly defined in Crohn’s disease, and how can it effectively be achieved and monitored in daily clinical practice? Within this review, we will give an overview of the ongoing debate about the definition of mucosal healing and the modalities to monitor inflammation, and finally present available therapies with the capacity to induce mucosal healing.

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