scholarly journals Design, Implementation and Control of a Fish Robot with Undulating Fins

10.5772/50898 ◽  
2011 ◽  
Vol 8 (5) ◽  
pp. 60 ◽  
Author(s):  
Mohsen Siahmansouri ◽  
Ahmad Ghanbari ◽  
Mir Masoud Seyyed Fakhrabadi
Keyword(s):  
Field Trials ◽  
Robotic Fish ◽  
Propulsive Force ◽  
Fish Robot ◽  
Revolution Speed ◽  
The Individual ◽  
And Control ◽  
Phase Angles ◽  
The Relationship ◽  
Undulating Fin

Biomimetic robots can potentially perform better than conventional robots in underwater vehicle designing. This paper describes the design of the propulsion system and depth control of a robotic fish. In this study, inspired by knife fish, we have designed and implemented an undulating fin to produce propulsive force. This undulating fin is a segmental anal fin that produces sinusoidal wave to propel the robot. The relationship between the individual fin segment and phase angles with the overall fin trajectory has also been discussed. This propulsive force can be adjusted and directed for fish robot manoeuvre by a mechanical system with two servomotors. These servomotors regulate the direction and depth of swimming. A wireless remote control system is designed to adjust the servomotors which enables us to control revolution, speed and phase differences of neighbor servomotors of fins. Finally, Field trials are conducted in an outdoor pool to demonstrate the relationship between robotic fish speed and fin parameters like phase difference, the number of phase and undulatory amplitude.

MANEUVERING OF BIOMIMETIC FISH BY INTEGRATING A BUOYANCY BODY WITH MODULAR UNDULATING FINS

2007 ◽  
Vol 04 (04) ◽  
pp. 671-695 ◽  
Author(s):  
K. H. LOW
Keyword(s):  
Field Trials ◽  
Biomimetic Robots ◽  
Laboratory Tank ◽  
The Individual ◽  
Relationship Of ◽  
Phase Angles ◽  
The Relationship ◽  
Undulating Fin ◽  
Better Than ◽  
Buoyancy Control

Biomimetic robots borrow their senses and structure from animals, such as insects, fishes, and human. Development of underwater vehicles is one of the areas where biomimetic robots can potentially perform better than conventional robots. In this paper, an undulating fin mechanism has been developed and used as the propulsion system of fish in various fin types. The layout and workspace of the modular fin segments are considered and analyzed. The relationship of the individual fin segment and phase angles with the overall fin trajectory is also discussed. A gymnotiform knifefish robot, as an example, has been developed to demonstrate the design methodology and prototype performance. The maneuvering and the buoyancy control can be achieved by the integration of a buoyancy tank with the undulating fin. Experiments were conducted in the laboratory tank and the variation of velocity with respect to several swimming parameters was analyzed. Field trials have also been conducted in an outdoor pool to demonstrate the swimming capability of the knifefish robot and its buoyancy performance in 4 m deep water.

Sprache und Denken Bei Wundt, Paul und Marty Ein Beitrag Zur Problemgeschichte Der Sprachpsychologie

1984 ◽  
Vol 11 (3) ◽  
pp. 413-448 ◽  
Author(s):  
Clemens Knobloch
Keyword(s):  
Historical Development ◽  
Complete Separation ◽  
Wilhelm Wundt ◽  
The Common ◽  
The Individual ◽  
And Control ◽  
The Relationship ◽  
Further Development ◽  
Oriented Approach ◽  
Do So

Summary The paper recaptures, on the basis of one of the central issues of the discussion, namely, the relationship between thought and speech, the psychlin-guistic controversy between Wilhelm Wundt (1832–1920), Hermann Paul (1846–1921), and Anton Marty (1847–1914) at the turn of this century. The basic tenets of all three theories are presented, their assumptions analysed, and their respective fruitfulness (or lack of it) put forward. After redressing the distorted picture of Wundt’s position in the recent historiography of psycholingu-istics, it is shown that Wundt’s model of an expression-oriented approach, which in effect identifies categories of linguistic surface structure with those of an inner psychological nature, remains circular and not amenable to further development. Hermann Paul, though making use of a similar procedure, is opposed to Wundt’s (as well as Heymann Steinthal’s (1823–1899) social psychology or Völkerpsychologie), favouring instead the individual as the locus of linguistic events (and hence linguistic analysis), thereby playing down the importance of linguistic intercourse and communication in language acquisition and historical development. Finally, in Marty’s theories the contradiction between his reliance on 19th-century event-directed psychology and a rather modern functional conception of language is most evident. Marty wants, unlike Wundt and Paul, to distinguish clearly between genetic and systematic questions. But while recognizing the complementarity of event expression and control of comprehension on the part of the hearer, he does not do so in the case of the linguistic representation of ‘objects and events’. In an attempt to escape from the naive homology of thinking and grammar, Marty argues in favour of a complete separation of the two mental activities. The paper argues that the common psychological premisses of these authors must be considered if the differences between them are to be understood, since it is just these particular premises that lie in the way of an adequate comprehension of problems of semantics and of communication.

Introduction

2018 ◽  
Author(s):  
Georgy Kantor ◽  
Tom Lambert ◽  
Hannah Skoda
Keyword(s):  
Natural Law ◽  
Social Contexts ◽  
Complex Idea ◽  
Property Relations ◽  
Absolute Property ◽  
Bundle Of Rights ◽  
The Individual ◽  
And Control ◽  
The Relationship ◽  
Property Regimes

Beginning with theories of absolute property, this introduction considers the merits of a more composite view, namely the ‘bundle of rights’ concept. Anthropologists discuss the relationships between people at the heart of property regimes, but personhood must also be seen as embedded in the things owned. The ideas of rules and control are key, and the concept of control at a distance provides useful conceptual purchase. Property is a complex idea to articulate, and natural law, religious and political frameworks of property are interwoven. Moreover, property is shaped by economic prerogatives, and its management shapes the relationship between the individual and the community, and the preservation of common resources. Property is, then, thoroughly embedded in social contexts, which in turn can render property highly unstable and contingent. It is precisely because of these kinds of tensions that legalism is so often invoked in order to manage and even create property relations.

scholarly journals Psychological Hardiness and its Relationship with the Superstition Thinking in SalahaddinUniversity Students

2021 ◽  
Vol 8 (4) ◽  
pp. 48-78
Author(s):  
Nawzad Ali Awrahman ◽  
Yousef Hama Salih Mustafa
Keyword(s):  
University Students ◽  
Negative Impact ◽  
Self Esteem ◽  
Control Center ◽  
Psychological Hardiness ◽  
Self Confidence ◽  
Psychological Pressure ◽  
The Individual ◽  
And Control ◽  
The Relationship

The problem of the research، when the level of (Hardiness) is High، the individual enjoys good mental and somatic health، but، when the level of Hardiness is less، it may lead to a lack of logical analysis or challenge and control positions، a decrease in its commitment to its values، principles، the individual's sense of psychological helplessness، alienation، and the individuals perception will not be as clear as it is in reality. University students during the progress of this study are exposed to all sorts of pressures and obstacles. Too little of Hardiness leady to suffering ill health physically and mental، wthe a negative impact on effectiveness، efficiency and success in academic study.          The importance of the current research in the study has shown that the relationship between Hardiness and superstition thinking by many variables، including the (psychological pressure، self-esteem، social support، in the field of special forces on the battlefield military forces، in the field of sports، self-confidence، motivated by achievement، effective self، sex، self-concept and the control center). The aim of this study is to identify the psychological Hardiness and superstition thinking among the samples as a whole and to recognize the significance of differences in terms of the central premise levels، as well as levels of Hardiness and superstition thinking among the samples to identify the implications of the differences by gender، study stage and specialization (Scientific or Humanitarian)، and the relationship between hardiness and superstition thinking among the samples as a whole by gender variables and study stage. The scale of superstitious thinking and psychological hardness was used on a sample of (240) male and female students، with (120) males and (120) females. The results showed significant levels of high psychological hardness and a decrease in superstitious thinking among the research sample of university students.

The Relation off Knowledge Development to Children's Basketball Performance

1987 ◽  
Vol 9 (1) ◽  
pp. 15-32 ◽  
Author(s):  
Karen E. French ◽  
Jerry R. Thomas
Keyword(s):  
Decision Making ◽  
Age Groups ◽  
Sport Performance ◽  
Specific Knowledge ◽  
Basketball Players ◽  
Cognitive Decision ◽  
The Individual ◽  
And Control ◽  
Relationship Of ◽  
The Relationship

This study examined the relationship of sport-specific knowledge to the development of children's skills in basketball. Two experiments were conducted. The first compared child expert and novice basketball players in two age leagues, 8-10 years and 11-12 years, on the individual components of basketball performance (control of the basketball, cognitive decisions, and motor execution) and on measures of basketball knowledge, dribbling skill, and shooting skill. Child expert players of both age groups possessed more shooting skill and more basketball knowledge. A canonical correlation analysis indicated that basketball knowledge was related to decision-making skill, whereas dribbling and shooting skill were related to the motor components of control and execution. Experiment 2 examined the changes in the individual components of performance, basketball knowledge, dribbling skill, and shooting skill from the beginning to the end of the season. Subjects improved in the cognitive decision-making and control components of performance across the course of the season, and basketball knowledge increased from the beginning to the end of the season. Only basketball knowledge was a significant predictor of the decision-making component at the end of the season. The overall results of Experiments 1 and 2 indicate that the development of the sport knowledge base plays a salient role in skilled sport performance of children.

A Study on Contractual Relationship Handle and Control in Constructional Engineering Disputes

2013 ◽  
Vol 273 ◽  
pp. 86-90
Author(s):  
Qing Jie Sheng
Keyword(s):  
Supreme Court ◽  
Civil Procedure ◽  
Private Enterprises ◽  
Construction Contracts ◽  
Construction Enterprises ◽  
Contractual Relationship ◽  
The Individual ◽  
And Control ◽  
Relationship Of ◽  
The Relationship

If the contracts signed by the construction enterprises with the relationship of affiliating operation under the name of themselves or titular enterprises, affiliating operators and titular units are usually co litigants to prosecute or response. It’s stipulated in Article of Supreme Court “Suggestions on Civil Procedure Law” that “if individual businesses, individual partnership or private enterprises affiliate themselves with collective enterprises and operate under the name of collective enterprises, the individual businesses, individual partnership or private enterprises and the titular collective enterprises shall be the co litigants.”Constructors are affiliated to other construction enterprises and sign construction contracts under the name of titular construction enterprises, but the titular construction enterprises don’t want to prosecute, the constructors can be plaintiffs, titular construction enterprises are not necessary to be regarded as co-plaintiffs.

Accent Policy and Accent Modification Enterprises as Potential Indicators of Intercultural Power Relations: A Call for an Updated Research Agenda

2013 ◽  
Vol 3 (1) ◽  
pp. 22-33 ◽  
Author(s):  
Brynne D. Ovalle ◽  
Rahul Chakraborty
Keyword(s):  
International Relations ◽  
Identity Construction ◽  
Social Theory ◽  
Power Relations ◽  
Linguistic Diversity ◽  
Cultural Organization ◽  
Using Data ◽  
The Individual ◽  
The Impact ◽  
The Relationship

This article has two purposes: (a) to examine the relationship between intercultural power relations and the widespread practice of accent discrimination and (b) to underscore the ramifications of accent discrimination both for the individual and for global society as a whole. First, authors review social theory regarding language and group identity construction, and then go on to integrate more current studies linking accent bias to sociocultural variables. Authors discuss three examples of intercultural accent discrimination in order to illustrate how this link manifests itself in the broader context of international relations (i.e., how accent discrimination is generated in situations of unequal power) and, using a review of current research, assess the consequences of accent discrimination for the individual. Finally, the article highlights the impact that linguistic discrimination is having on linguistic diversity globally, partially using data from the United Nations Educational, Scientific and Cultural Organization (UNESCO) and partially by offering a potential context for interpreting the emergence of practices that seek to reduce or modify speaker accents.

Investigating the Relationship Between Self-Esteem and Stigma Among Young Adults With History of Suicide Attempts

Crisis ◽  
2016 ◽  
Vol 37 (4) ◽  
pp. 265-270 ◽  
Author(s):  
Meshan Lehmann ◽  
Matthew R. Hilimire ◽  
Lawrence H. Yang ◽  
Bruce G. Link ◽  
Jordan E. DeVylder
Keyword(s):  
Young Adults ◽  
Suicide Attempts ◽  
Self Esteem ◽  
High Risk Population ◽  
High Functioning ◽  
People With Mental Illness ◽  
History Of ◽  
The Individual ◽  
The Impact ◽  
The Relationship

Abstract. Background: Self-esteem is a major contributor to risk for repeated suicide attempts. Prior research has shown that awareness of stigma is associated with reduced self-esteem among people with mental illness. No prior studies have examined the association between self-esteem and stereotype awareness among individuals with past suicide attempts. Aims: To understand the relationship between stereotype awareness and self-esteem among young adults who have and have not attempted suicide. Method: Computerized surveys were administered to college students (N = 637). Linear regression analyses were used to test associations between self-esteem and stereotype awareness, attempt history, and their interaction. Results: There was a significant stereotype awareness by attempt interaction (β = –.74, p = .006) in the regression analysis. The interaction was explained by a stronger negative association between stereotype awareness and self-esteem among individuals with past suicide attempts (β = –.50, p = .013) compared with those without attempts (β = –.09, p = .037). Conclusion: Stigma is associated with lower self-esteem within this high-functioning sample of young adults with histories of suicide attempts. Alleviating the impact of stigma at the individual (clinical) or community (public health) levels may improve self-esteem among this high-risk population, which could potentially influence subsequent suicide risk.

From Container to Claustrum: Projective Identification in Couples

2014 ◽  
Vol 4 (2) ◽  
Author(s):  
Tamara Feldman
Keyword(s):  
Psychological Health ◽  
Projective Identification ◽  
The Self ◽  
The Other ◽  
Intimate Partners ◽  
And Control ◽  
The Relationship ◽  
As If

This paper is a contribution to the growing literature on the role of projective identification in understanding couples' dynamics. Projective identification as a defence is well suited to couples, as intimate partners provide an ideal location to deposit unwanted parts of the self. This paper illustrates how projective identification functions differently depending on the psychological health of the couple. It elucidates how healthier couples use projective identification more as a form of communication, whereas disturbed couples are inclined to employ it to invade and control the other, as captured by Meltzer's concept of "intrusive identification". These different uses of projective identification affect couples' capacities to provide what Bion called "containment". In disturbed couples, partners serve as what Meltzer termed "claustrums" whereby projections are not contained, but imprisoned or entombed in the other. Applying the concept of claustrum helps illuminate common feelings these couples express, such as feeling suffocated, stifled, trapped, held hostage, or feeling as if the relationship is killing them. Finally, this paper presents treatment challenges in working with more disturbed couples.

Virginia Woolf and Being-in-the-world

2017 ◽  
Author(s):  
Emma Simone
Keyword(s):  
Virginia Woolf ◽  
Historical Context ◽  
The Political ◽  
Cartesian Dualism ◽  
Self And Other ◽  
The World ◽  
Binary Oppositions ◽  
The Individual ◽  
The Relationship ◽  
Existential Perspective

Virginia Woolf and Being-in-the-world: A Heideggerian Study explores Woolf’s treatment of the relationship between self and world from a phenomenological-existential perspective. This study presents a timely and compelling interpretation of Virginia Woolf’s textual treatment of the relationship between self and world from the perspective of the philosophy of Martin Heidegger. Drawing on Woolf’s novels, essays, reviews, letters, diary entries, short stories, and memoirs, the book explores the political and the ontological, as the individual’s connection to the world comes to be defined by an involvement and engagement that is always already situated within a particular physical, societal, and historical context. Emma Simone argues that at the heart of what it means to be an individual making his or her way in the world, the perspectives of Woolf and Heidegger are founded upon certain shared concerns, including the sustained critique of Cartesian dualism, particularly the resultant binary oppositions of subject and object, and self and Other; the understanding that the individual is a temporal being; an emphasis upon intersubjective relations insofar as Being-in-the-world is defined by Being-with-Others; and a consistent emphasis upon average everydayness as both determinative and representative of the individual’s relationship to and with the world.

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