Rays of the World

Rays are among the largest fishes and evolved from shark-like ancestors nearly 200 million years ago. They share with sharks many life history traits: all species are carnivores or scavengers; all reproduce by internal fertilisation; and all have similar morphological and anatomical characteristics, such as skeletons built of cartilage. Rays of the World is the first complete pictorial atlas of the world’s ray fauna and includes information on many species only recently discovered by scientists while undertaking research for the book. It includes all 26 families and 633 valid named species of rays, but additional undescribed species exist for many groups. Rays of the World features a unique collection of paintings of all living species by Australian natural history artist Lindsay Marshall, compiled as part of a multinational research initiative, the Chondrichthyan Tree of Life Project. Images sourced from around the planet were used by the artist to illustrate the fauna. This comprehensive overview of the world’s ray fauna summarises information such as general identifying features and distributional information about these iconic, but surprisingly poorly known, fishes. It will enable readers to gain a better understanding of the rich diversity of rays and promote wider public interest in the group. Rays of the World is an ideal reference for a wide range of readers, including conservationists, fishery managers, scientists, fishers, divers, students and book collectors.

2018 ◽  
Vol 16 (1) ◽  
pp. 112-119
Author(s):  
VLADIMIR GLEB NAYDONOV

The article considers the students’ tolerance as a spectrum of personal manifestations of respect, acceptance and correct understanding of the rich diversity of cultures of the world, values of others’ personality. The purpose of the study is to investgate education and the formation of tolerance among the students. We have compiled a training program to improve the level of tolerance for interethnic differences. Based on the statistical analysis of the data obtained, the most important values that are significant for different levels of tolerance were identified.


Science ◽  
2013 ◽  
Vol 341 (6147) ◽  
pp. 746-751 ◽  
Author(s):  
Jeffery L. Dangl ◽  
Diana M. Horvath ◽  
Brian J. Staskawicz

Diverse and rapidly evolving pathogens cause plant diseases and epidemics that threaten crop yield and food security around the world. Research over the last 25 years has led to an increasingly clear conceptual understanding of the molecular components of the plant immune system. Combined with ever-cheaper DNA-sequencing technology and the rich diversity of germ plasm manipulated for over a century by plant breeders, we now have the means to begin development of durable (long-lasting) disease resistance beyond the limits imposed by conventional breeding and in a manner that will replace costly and unsustainable chemical controls.


This exciting new Handbook offers a comprehensive overview of the contemporary state of the field. The editors’ introduction and forty-five essays cover feminist critical engagements with philosophy and adjacent scholarly fields, as well as feminist approaches to current debates and crises across the world. Authors cover topics ranging from the ways in which feminist philosophy attends to other systems of oppression, and the gendered, racialized, and classed assumptions embedded in philosophical concepts, to feminist perspectives on prominent subfields of philosophy. The first section contains chapters that explore feminist philosophical engagement with mainstream and marginalized histories and traditions, while the second section parses feminist philosophy’s contributions to with numerous philosophical subfields, for example metaphysics and bioethics. A third section explores what feminist philosophy can illuminate about crucial moral and political issues of identity, gender, the body, autonomy, prisons, among numerous others. The Handbook concludes with the field’s engagement with other theories and movements, including trans studies, queer theory, critical race, theory, postcolonial theory, and decolonial theory. The volume provides a rigorous but accessible resource for students and scholars who are interested in feminist philosophy, and how feminist philosophers situate their work in relation to the philosophical mainstream and other disciplines. Above all it aims to showcase the rich diversity of subject matter, approach, and method among feminist philosophers.


Humanities ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 78 ◽  
Author(s):  
James Baumlin ◽  
Craig Meyer

The aim of this essay is to introduce, contextualize, and provide rationale for texts published in the Humanities special issue, Histories of Ethos: World Perspectives on Rhetoric. It surveys theories of ethos and selfhood that have evolved since the mid-twentieth century, in order to identify trends in discourse of the new millennium. It outlines the dominant theories—existentialist, neo-Aristotelian, social-constructionist, and poststructuralist—while summarizing major theorists of language and culture (Archer, Bourdieu, Foucault, Geertz, Giddens, Gusdorf, Heidegger). It argues for a perspectivist/dialectical approach, given that no one theory comprehends the rich diversity of living discourse. While outlining the “current state of theory,” this essay also seeks to predict, and promote, discursive practices that will carry ethos into a hopeful future. (We seek, not simply to study ethos, but to do ethos.) With respect to twenty-first century praxis, this introduction aims at the following: to acknowledge the expressive core of discourse spoken or written, in ways that reaffirm and restore an epideictic function to ethos/rhetoric; to demonstrate the positionality of discourse, whereby speakers and writers “out themselves” ethotically (that is, responsively and responsibly); to explore ethos as a mode of cultural and embodied personal narrative; to encourage an ethotic “scholarship of the personal,” expressive of one’s identification/participation with/in the subject of research; to argue on behalf of an iatrological ethos/rhetoric based in empathy, care, healing (of the past) and liberation/empowerment (toward the future); to foster interdisciplinarity in the study/exploration/performance of ethos, establishing a conversation among scholars across the humanities; and to promote new versions and hybridizations of ethos/rhetoric. Each of the essays gathered in the abovementioned special issue achieves one or more of these aims. Most are “cultural histories” told within the culture being surveyed: while they invite criticism as scholarship, they ask readers to serve as witnesses to their stories. Most of the authors are themselves “positioned” in ways that turn their texts into “outings” or performances of gender, ethnicity, “race,” or ability. And most affirm the expressive, epideictic function of ethos/rhetoric: that is, they aim to display, affirm, and celebrate those “markers of identity/difference” that distinguish, even as they humanize, each individual and cultural storytelling. These assertions and assumptions lead us to declare that Histories of Ethos, as a collection, presents a whole greater than its essay-parts. We conceive it, finally, as a conversation among theories, histories, analyses, praxes, and performances. Some of this, we know, goes against the grain of modern (Western) scholarship, which privileges analysis over narrative and judges texts against its own logocentric commitments. By means of this introduction and collection, we invite our colleagues in, across, and beyond the academy “to see differently.” Should we fall short, we will at least have affirmed that some of us “see the world and self”—and talk about the world and self—through different lenses and within different cultural vocabularies and positions.


Author(s):  
Mike Rapport

‘Jacobinism’ as perceived and experienced outside France varied between local contexts, the rich diversity of responses to the French Revolution reflecting the ideas, symbols and rhetoric emanating from France, but also pre-existing political and ideological trends, earlier attempts at reform, the specific structures of society and the scale of resistance to change. There were commonalities that included similarities in ideology, rhetoric, symbols and practices, but international Jacobinism was never a coherent ideology or political movement. ‘Jacobins’ outside France were, moreover, usually minorities and everywhere they felt the full force of reactions in defence of tradition and the conservative order. The varieties of ‘Jacobinism’ outside France nonetheless provided an important response to the widespread debates about the nature of freedom and political identity, the shape of which was being fervently disputed around the world.


2016 ◽  
Author(s):  
David Meyer

Abstract. The total number of drones used in the air, on the land and in the water is growing in recent years. This review focuses on ocean robots and in particular on glider technology which seems to be one of the most promising oceanographic tools for future marine research. Glider are remotely controlled underwater vehicles carrying out missions with lifetime exceeding months, traveling thoundsands of kilometers, even through harsh environments. Depending on their scientific payload, they can be used for very specific research tasks, as well as for common environmental monitoring purposes. In combination with other technologies (e.g. moorings, satellites, drifters, floats) and as a part of existing observation networks they are of great advantage and thus help to get a more synoptic view on the world's oceans. This review covers a wide range of topics – from the history and the development of glider technology to its application in a variety of field studies regarding marine sciences. It offers a comprehensive overview of both, the technical and the scientific dimension, facilitating a fast access to the world of glider.


2007 ◽  
Vol 191 (6) ◽  
pp. 567-570
Author(s):  
Allan Beveridge

In the novel Hard Times, Charles Dickens gives his views on education. His character Mr Gradgrind believes in ‘facts’ and is suspicious of the imagination. All we need to know about the world, he maintains, can be reduced to simple facts. Dickens shows that such a philosophy leads to the impoverishment of the mind and to the weakening of ethical reasoning. Today it seems that the descendants of Mr Gradgrind are still in charge. The main psychiatric library where I work has been closed. It is argued that we can obtain all the ‘facts’ we need from the internet. The notion that books might have more to offer than prosaic detail, that they reflect the rich diversity of human experience, seems alien to the modern-day Gradgrinds.


Author(s):  
Nicolas Bommarito

Many of us, even on our happiest days, struggle to quiet the constant buzz of anxiety in the background of our minds. All kinds of worries—worries about losing people and things, worries about how we seem to others—keep us from peace of mind. Distracted or misled by our preoccupations, misconceptions, and, most of all, our obsession with ourselves, we do not see the world clearly—we do not see the world as it really is. In our search for happiness and the good life, this is the main problem. But luckily there is a solution, and on the path to understanding it, we can make use of the rich and varied teachings that have developed over centuries of Buddhist thought. This book explores the central elements of centuries of Buddhist philosophy and practice, explaining how they can improve life and teach us how to live without fear. Mining important texts and lessons for practical guidance, it provides a guide to the very practical goals that underpin Buddhist philosophy. After laying out the basic ideas, the text walks readers through a wide range of techniques and practices we can adopt to mend ingrained habits.


2017 ◽  
Vol 5 (3) ◽  
pp. 45
Author(s):  
Kaustav Chakrabarti

The Jewish women of Calcutta contributed extensively towards building and consolidating the rich socio-cultural heritage through the creation of social and cultural infrastructures like schools, hospitals, baby clinics, women and youth organizations. Breaking social taboos, they were stimulated by the attractions of western education and took up modern professions. Their contributions were keenly appreciated both in pre-and post-independent India, which this paper tries to explore. Moreover, when India is delving into the rich diversity of its different voices, with women and environmental issues coming to the fore, the contribution(s) of the Jewish women, as the “other voice of history” could hardly be ignored. Thus besides highlighting the different aspects of the world of the Jewish women of Calcutta and their contribution in the literary-educational field, the paper also tries to fit their collective experience in a multi-cultural rubric, in the Indian context.


1996 ◽  
Vol 10 (09) ◽  
pp. 977-1094 ◽  
Author(s):  
MANVIR S. KUSHWAHA

The rich diversity and the fundamental character of the essential theoretical problems associated with it have given band theory a width of interest which contrasts strongly with the apparent narrowness of its subject matter. This review, dealing mainly with the classical band structures of periodic elastic and acoustic binary systems, offers briefly a systematic survey of the historical development of the principles, tools, and applications of band theory for electrons, phonons, photons, and vibrations giving what may be called the "background" to the more recent developments in the fields of photonic and phononic band-gap crystals. Attention is given to survey the physical conditions required to achieve the complete spectral gaps within which the respective propagating modes are utterly forbidden irrespective of the direction of propagation. The existence of complete spectral gaps for cleverly synthesized photonic crystals guarantees the observability of classical Anderson localization of photons and the influence on the spontaneous emission which was, until the 1980's, often regarded as a natural and uncontrollable phenomenon. The phononic band-gap crystals, on the other hand, offer the feasibility of constructing the ultrasound filters, polarization filters, and improvements in designing the transducers, as well as the observability of classical elastic or acoustic wave localization. Abiding by the central theme of the review, numerous theoretical results on the band structure related problems for periodic elastic and acoustic binary sytems have been gathered and reviewed. This survey is preceded by a detailed mathematical machinery that provides the reader with numerous useful analytical results applicable to a wide range of systems of varying interest. Finally, the report concludes with a summary of anticipated implications of photonic and phononic band-gap crystals and proposes some interesting relevant problems concerned with the spectral gaps and the classical wave localization. Our satisfaction in writing this review, like any other review which covers a considerably longer period, was to reach a reasonably self-contained unity by wanting to "leave nothing unexplained". The background provided is believed to make less formidable the task of future writers of reviews in this rather general field and hence enable them to deal more readily with particular aspects of the subject, or with recent advances in those directions in which notable progress may have been made.


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