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11,373
result(s) for
"SCIENCE / Space Science / Cosmology."
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Where Did the Universe Come from? and Other Cosmic Questions
2021
Go on an awe-inspiring journey, unraveling the secrets of our universe from the tiniest particles to the vastness of space In this thought-provoking exploration, physicists Chris Ferrie and Geraint F.Lewis delve into the fundamental questions that have puzzled humanity for centuries.What sparked the birth of the universe?.
Dynamics of dark matter misalignment through the Higgs portal
by
Ghalsasi, Akshay
,
Rai, Mudit
,
Batell, Brian
in
Abundance
,
Astrochemistry
,
Astronomy, Cosmology and Space Sciences
2024
A
bstract
A light singlet scalar field feebly coupled through the super-renormalizable Higgs portal provides a minimal and well-motivated realization of ultra-light bosonic dark matter. We study the cosmological production of dark matter in this model by elucidating the dynamics of two sources of scalar field misalignment generated during the radiation era. For large scalar masses (above
O
(10
−
3
eV)), dark matter is produced through
thermal misalignment
, by which the scalar field is driven towards large field values as a result of the finite-temperature effective potential. The dominance of thermal misalignment in this mass range leads to a sharp relic abundance prediction which is, to a significant extent, insensitive to the initial conditions of the scalar field. On the other hand, for low mass scalars (below
O
(10
−
5
eV)), dark matter is produced via
VEV misalignment
, which is caused by the induced scalar field vacuum expectation value triggered by the electroweak phase transition. We show that the relic abundance in this low mass range is sensitive to the scalar field initial conditions. In the intermediate mass range, the relic abundance is a consequence of a competition between thermal misalignment and VEV misalignment, which can potentially lead to novel forced resonance effects which cause a recurring enhancement and suppression in the late time oscillation amplitude as a function of the scalar mass. We compare our relic abundance predictions with constraints and projections from equivalence principle and inverse square law tests, stellar cooling, resonant molecular absorption, and observations of extra-galactic background light and diffuse X-ray backgrounds. New experimental ideas are needed to probe most of the cosmologically motivated regions of parameter space.
Journal Article
Early childhood education, postcolonial theory, and teaching practices in India : balancing Vygotsky and the Veda
by
Gupta, Amita
in
Astronomy, Astrophysics and Cosmology
,
Constructivism (Education)
,
Education, Primary
2006
This book presents previously unexamined connections between teaching practices and specific philosophical ideas, locating the prior beliefs and practical knowledge of early childhood practitioners in urban India within the broader social and historical religio-philosophical context.
Teaching transformation : transcultural classroom dialogues
Drawing on indigenous belief systems and recent work in critical 'race' studies and multicultural-feminist theory, Keating provides detailed step-by-step suggestions, based on her own teaching experiences, designed to anticipate and change students' resistance to social-justice issues. It offers a holistic approach to theory and practice.
Inventing the modern self and John Dewey : modernities and the traveling of pragmatism in education
2008,2005
This collection includes original studies from scholars from thirteen nations, who explore the epistemic features figured in John Dewey's writings in his discourses on public schooling. Pragmatism was one of the weapons used in the struggles about the development of the child who becomes the future citizen. The significance of Dewey in the book is not about Dewey as the messenger of pragmatism, but in locating different cultural, political and educational terrains in which debates about modernity, the modern self and the making of the citizen occurred.
Vodou in Haitian life and culture : invisible powers
by
Bellegarde-Smith, Patrick
,
Michel, Claudine
in
Haiti
,
Haiti -- Religious life and customs
,
Religious life and customs
2006,2007
An introduction to Vodou practices and beliefs, with a focus on Haiti.
Addressing ethnic conflict through peace education : international perspectives
by
McGlynn, Claire
,
Bekerman, Zvi
in
Astronomy, Astrophysics and Cosmology
,
Case studies
,
Conflict management
2007
This collection on peace education includes contributions from an international group of scholars representing a wide variety of geographical conflict areas and exemplifying the multiple venues of peace educational labour. A strong emphasis is given to integrative and sustained long-term peace education efforts.
Islam obscured : the rhetoric of anthropological representation
Ethnographers have observed Muslims nearly everywhere Islam is practiced. This study analyzes four seminal texts that have been read widely outside anthropology. Two are by distinguished anthropologists on either side of the Atlantic, Islam Observed (by Clifford Geertz in 1968) and Muslim Society (by Ernest Gellner in 1981). Two other texts are by Muslim scholars, Beyond the Veil (Fatima Mernissi in 1975) and Discovering Islam (by Akbar Ahmed in 1988). Varisco argues that each of these four authors approaches Islam as an essentialized organic unity rather than letting 'Islams' found in the field speak to the diversity of practice. The textual truths engendered, and far too often engineered, in these idealized representations of Islam have found their way unscrutinized into an endless stream of scholarly works and textbooks. Varisco's analysis goes beyond the rhetoric over what Islam is to the information from ethnographic research about what Muslims say they do and actually are observed to do. The issues covered include Islam as a cultural phenomenon, representation of 'the other', Muslim gender roles, politics of ethnographic authority, and Orientalist discourse.
Indigenous knowledge and learning in Asia/Pacific and Africa : perspectives on development, education, and culture
2010
This collection makes a unique contribution towards the amplification of indigenous knowledge and learning by adopting an inter/trans-disciplinary approach to the subject that considers a variety of spaces of engagement around knowledge in Asia and Africa.
A peaceful Jihad : negotiating identity and modernity in Muslim Java
by
Lukens-Bull, Ronald
in
Anthropology
,
Astronomy, Astrophysics and Cosmology
,
Cultural Anthropology
2005
Based on extensive ethnographic research, this book examines how the Islamic community in Java, Indonesia, is actively negotiating both modernity and tradition in the contexts of nation-building, globalisation, and a supposed clash of civilizations. The pesantren community, so-called because it is centered around an educational institution called the pesantren, uses education as a central arena for dealing with globalization and the construction and maintenance of an Indonesian Islamic identity. However, the community's efforts to wrestle with these issues extend beyond education into the public sphere in general and specifically in the area of leadership and politics. The case material is used to understand Muslim strategies and responses to civilizational contact and conflict. Scholars, educated readers, and advanced undergraduates interested in Islam, religious education, the construction of religious identity in the context of national politics and globalization will find this work useful.