ON THE COMPLEXITY OF BIOMECHANICAL MODELS USED FOR NEUROPROSTHESES DEVELOPMENT

2002 ◽  
Vol 02 (03n04) ◽  
pp. 389-404 ◽  
Author(s):  
ROBERT RIENER ◽  
THOMAS FUHR ◽  
JOHANNES SCHNEIDER
Keyword(s):  
Muscle Activation ◽  
Control Design ◽  
Model Complexity ◽  
Segmental Motion ◽  
Comprehensive Model ◽  
Biomechanical Models ◽  
Complex Models ◽  
The Many ◽  
The One ◽  
Model Approach

The use of mathematical models has the potential to enhance the development of lower extremity neuroprostheses (NP) based on Functional Electrical Simulation (FES). The choice of model complexity is not trivial when building a model for FES control design. On the one hand, a comprehensive model might be useful to account for the many different biomechanical and neurophysiological effects that can be observed during FES-induced movements. On the other hand, too complex models are difficult to be utilized in and identified for NP applications. In this paper we discuss the disadvantages of too complex models, and propose potential simplifications on the basis of existing models that are commonly used to describe muscle activation, muscle contraction and body-segmental motion. The obtained model approach is simple enough to be identified, and sufficiently comprehensive to describe most of the relevant effects that occur during FES-induced locomotion.

Control of flexible manipulators: A survey

Robotica ◽  
2004 ◽  
Vol 22 (5) ◽  
pp. 533-545 ◽  
Author(s):  
M. Benosman ◽  
G. Le Vey
Keyword(s):  
Linear Models ◽  
Control Strategies ◽  
Research Area ◽  
Future Research ◽  
Complex Nature ◽  
Open Problems ◽  
Complex Models ◽  
The Many ◽  
The One ◽  
Flexible Arms

A survey of the field of control for flexible multi-link robots is presented. This research area has drawn great attention during the last two decades, and seems to be somewhat less “attractive” now, due to the many satisfactory results already obtained, but also because of the complex nature of the remaining open problems. Thus it seems that the time has come to try to deliver a sort of “state of the art” on this subject, although an exhaustive one is out of scope here, because of the great amount of publications. Instead, we survey the most salient progresses – in our opinion – approximately during the last decade, that are representative of the essential different ideas in the field. We proceed along with the exposition of material coming from about 119 included references. We do not pretend to deeply present each of the methods quoted hereafter; however, our goal is to briefly introduce most of the existing methods and to refer the interested reader to more detailed presentations for each scheme. To begin with, a now well-established classification of the flexible arms control goals is given. It is followed by a presentation of different control strategies, indicating in each case whether the approach deals with the one-link case, which can be successfully treated via linear models, or with the multi-link case which necessitates nonlinear, more complex, models. Some possible issues for future research are given in conclusion.

From competition to co-operation: Shifting the “one best model” perspective

2021 ◽  
pp. 095935432199590
Author(s):  
Hannah Hawkins-Elder ◽  
Tony Ward
Keyword(s):  
Mental Disorders ◽  
Mental Distress ◽  
Theory And Practice ◽  
Therapeutic Interventions ◽  
Multiple Model ◽  
Health Practitioners ◽  
Heated Debate ◽  
The Many ◽  
The One ◽  
Model Approach

Mental disorders are arguably one of the most complex and serious problems facing health practitioners today and yet their causes remain, largely, a mystery. Accordingly, there is frequent and heated debate over which of the many available models of mental disorder and their associated therapeutic interventions are likely to be most useful. The prevailing attitude toward the conceptualization of mental distress appears to be that a single superior model will emerge that neatly accounts for one or more disorder presentations: the “One Best Model” (OBM) perspective. In this article, we argue for a transition away from the OBM perspective toward a multiple model approach to psychopathology that is collaborative and pluralistic. We begin by outlining the particulars of the OBM perspective and elaborating on the problems it presents for psychopathology theory and practice. We then suggest specific ways in which this problem may be ameliorated, by adjusting how we approach the processes of modelling disorder, translating models into interventions, and applying models and interventions in practice.

A Comprehensive Model for Medical Information Processing

1983 ◽  
Vol 22 (03) ◽  
pp. 124-130 ◽  
Author(s):  
J. H. Bemmel
Keyword(s):  
Intensive Care ◽  
Information Processing ◽  
Medical Information ◽  
Computer Applications ◽  
Human Interaction ◽  
Comprehensive Model ◽  
Computers In Medicine ◽  
Medical Information Systems ◽  
Research And Education ◽  
The Many

At first sight, the many applications of computers in medicine—from payroll and registration systems to computerized tomography, intensive care and diagnostics—do make a rather chaotic impression. The purpose of this article is to propose a scheme or working model for putting medical information systems in order. The model comprises six »levels of complexity«, running parallel to dependence on human interaction. Several examples are treated to illustrate the scheme. The reason why certain computer applications are more frequently used than others is analyzed. It has to be strongly considered that the differences in complexity and dependence on human involvement are not accidental but fundamental. This has consequences for research and education which are also discussed.

Costumes and Choreography from Bodenwieser's Trunk: The Coat as Affective Memory

2019 ◽  
Vol 37 (1) ◽  
pp. 89-110
Author(s):  
Rachel Fensham
Keyword(s):  
Modern Dance ◽  
Human Condition ◽  
Personal Life ◽  
Creative Thought ◽  
Cain And Abel ◽  
Embodied Research ◽  
The Many ◽  
The One ◽  
Material Evidence ◽  
Selection Of

The Viennese modern choreographer Gertrud Bodenwieser's black coat leads to an analysis of her choreography in four main phases – the early European career; the rise of Nazism; war's brutality; and postwar attempts at reconciliation. Utilising archival and embodied research, the article focuses on a selection of Bodenwieser costumes that survived her journey from Vienna, or were remade in Australia, and their role in the dramaturgy of works such as Swinging Bells (1926), The Masks of Lucifer (1936, 1944), Cain and Abel (1940) and The One and the Many (1946). In addition to dance history, costume studies provides a distinctive way to engage with the question of what remains of performance, and what survives of the historical conditions and experience of modern dance-drama. Throughout, Hannah Arendt's book The Human Condition (1958) provides a critical guide to the acts of reconstruction undertaken by Bodenwieser as an émigré choreographer in the practice of her craft, and its ‘materializing reification’ of creative thought. As a study in affective memory, information regarding Bodenwieser's personal life becomes interwoven with the author's response to the material evidence of costumes, oral histories and documents located in various Australian archives. By resurrecting the ‘dead letters’ of this choreography, the article therefore considers how dance costumes offer the trace of an artistic resistance to totalitarianism.

AFRICAN WOMEN AND FORBIDDEN GROUNDS: FEMALE SEXUALITY AND SELF-DETERMINATION IN AFRICAN LITERATURE

Imbizo ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 40-54
Author(s):  
Oyeh O. Otu
Keyword(s):  
Female Sexuality ◽  
Sense Of Self ◽  
African Literature ◽  
The Other ◽  
Self Determination ◽  
African Women ◽  
The Core ◽  
The Many ◽  
The One ◽  
Sexual Repression

This article examines how female conditioning and sexual repression affect the woman’s sense of self, womanhood, identity and her place in society. It argues that the woman’s body is at the core of the many sites of gender struggles/ politics. Accordingly, the woman’s body must be decolonised for her to attain true emancipation. On the one hand, this study identifies the grave consequences of sexual repression, how it robs women of their freedom to choose whom to love or marry, the freedom to seek legal redress against sexual abuse and terror, and how it hinders their quest for self-determination. On the other hand, it underscores the need to give women sexual freedom that must be respected and enforced by law for the overall good of society.

Emerson's Memory Loss

2017 ◽  
Author(s):  
Christopher Hanlon
Keyword(s):  
William James ◽  
Memory Loss ◽  
Margaret Fuller ◽  
Final Phase ◽  
Important Work ◽  
The Social ◽  
The Many ◽  
The One ◽  
Do So ◽  
The Way

Emerson’s Memory Loss is about an archive of texts documenting Emerson’s intellectual state during the final phase of his life, as he underwent dementia. It is also about the way these texts provoke a rereading of the more familiar canon of Emerson’s thinking. Emerson’s memory loss, Hanlon argues, contributed to the shaping of a line of thought in America that emphasizes the social over the solipsistic, the affective over the distant, the many over the one. Emerson regarded his output during the time when his patterns of cognition transformed profoundly as a regathering of focus on the nature of memory and of thinking itself. His late texts theorize Emerson’s experience of senescence even as they disrupt his prior valorizations of the independent mind teeming with self-sufficient conviction. But still, these late writings have succumbed to a process of critical forgetting—either ignored by scholars or denied inclusion in Emerson’s oeuvre. Attending to a manuscript archive that reveals the extent to which Emerson collaborated with others—especially his daughter, Ellen Tucker Emerson—to articulate what he considered his most important work even as his ability to do so independently waned, Hanlon measures the resonance of these late texts across the stretch of Emerson’s thinking, including his writing about Margaret Fuller and his meditations on streams of thought that verge unto those of his godson, William James. Such ventures bring us toward a self defined less by its anxiety of overinfluence than by its communality, its very connectedness with myriad others.

Subordinate-Deity Models of Ultimate Reality

2017 ◽  
Author(s):  
Wesley J. Wildman
Keyword(s):  
Twentieth Century ◽  
Ultimate Reality ◽  
Post Colonial ◽  
Metaphysical Problem ◽  
Axial Age ◽  
Colonial Resistance ◽  
The Many ◽  
The One

Subordinate-deity models of ultimate reality affirm that God is Highest Being within an ultimate reality that is neither conceptually tractable nor religiously relevant. Subordinate-deity models ceded their dominance to agential-being models of ultimate reality by refusing to supply a comprehensive answer to the metaphysical problem of the One and the Many in the wake of the Axial-Age interest in that problem, but they have revived in the twentieth century due to post-colonial resistance to putatively comprehensive explanations. Subordinate-deity ultimacy models resist the Intentionality Attribution and Narrative Comprehensibility dimensions of anthropomorphism to some degree but continue to employ the Rational Practicality dimension of anthropomorphism, resulting in a strategy of judicious anthropomorphism. Variations, strengths, and weaknesses of the subordinate-deity class of ultimacy models are discussed.

Surfing the Quantum World

2017 ◽  
Author(s):  
Frank S. Levin
Keyword(s):  
Quantum Mechanics ◽  
Quantum Theory ◽  
Musical Instrument ◽  
Popular Science ◽  
Quantum Spin ◽  
Exclusion Principle ◽  
Maximum Height ◽  
Core Concepts ◽  
The Many ◽  
The One

Surfing the Quantum World bridges the gap between in-depth textbooks and typical popular science books on quantum ideas and phenomena. Among its significant features is the description of a host of mind-bending phenomena, such as a quantum object being in two places at once or a certain minus sign being the most consequential in the universe. Much of its first part is historical, starting with the ancient Greeks and their concepts of light, and ending with the creation of quantum mechanics. The second part begins by applying quantum mechanics and its probability nature to a pedagogical system, the one-dimensional box, an analog of which is a musical-instrument string. This is followed by a gentle introduction to the fundamental principles of quantum theory, whose core concepts and symbolic representations are the foundation for most of the subsequent chapters. For instance, it is shown how quantum theory explains the properties of the hydrogen atom and, via quantum spin and Pauli’s Exclusion Principle, how it accounts for the structure of the periodic table. White dwarf and neutron stars are seen to be gigantic quantum objects, while the maximum height of mountains is shown to have a quantum basis. Among the many other topics considered are a variety of interference phenomena, those that display the wave properties of particles like electrons and photons, and even of large molecules. The book concludes with a wide-ranging discussion of interpretational and philosophic issues, introduced in Chapters 14 by entanglement and 15 by Schrödinger’s cat.

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