Castes of mind Dirks, Nicholas B
2001., 20111009, 2011, 2001, 2002-01-01
eBook
When thinking of India, it is hard not to think of caste. In academic and common parlance alike, caste has become a central symbol for India, marking it as fundamentally different from other places ...while expressing its essence. Nicholas Dirks argues that caste is, in fact, neither an unchanged survival of ancient India nor a single system that reflects a core cultural value. Rather than a basic expression of Indian tradition, caste is a modern phenomenon--the product of a concrete historical encounter between India and British colonial rule. Dirks does not contend that caste was invented by the British. But under British domination caste did become a single term capable of naming and above all subsuming India's diverse forms of social identity and organization.
Culture/Power/History Dirks, Nicholas B; Eley, Geoffrey H; Ortner, Sherry B
2021, 1993, 2021-04-13, Letnik:
12
eBook
The intellectual radicalism of the 1960s spawned a new set of questions about the role and nature of "the political" in social life, questions that have since revolutionized nearly every field of ...thought, from literary criticism through anthropology to the philosophy of science. Michel Foucault in particular made us aware that whatever our functionally defined "roles" in society, we are constantly negotiating questions of authority and the control of the definitions of reality. Such insights have led theorists to challenge concepts that have long formed the very underpinnings of their disciplines. By exploring some of the most debated of these concepts--"culture, " "power, " and "history"--this reader offers an enriching perspective on social theory in the contemporary moment. Organized around these three concepts, Culture/ Power/History brings together both classic and new essays that address Foucault's "new economy of power relations" in a number of different, contestatory directions. Representing innovative work from various disciplines and sites of study, from taxidermy to Madonna, the book seeks to affirm the creative possibilities available in a time marked by growing uncertainty about established disciplinary forms of knowledge and by the increasing fluidity of the boundaries between them. The book is introduced by a major synthetic essay by the editors, which calls attention to the most significant issues enlivening theoretical discourse today. The editors seek not only to encourage scholars to reflect anew on the course of social theory, but also to orient newcomers to this area of inquiry. The essays are contributed by Linda Alcoff ("Cultural Feminism versus Post- Structuralism"), Sally Alexander ("Women, Class, and Sexual Differences in the 1830s and 1840s"), Tony Bennett ("The Exhibitionary Complex"), Pierre Bourdieu ("Structures, Habitus, Power"), Nicholas B. Dirks ("Ritual and Resistance"), Geoff Eley ("Nations, Publics, and Political Cultures"), Michel Foucault (Two Lectures), Henry Louis Gates, Jr. ("Authority, White Power and the Black Critic"), Stephen Greenblatt ("The Circulation of Social Energy"), Ranajit Guha ("The Prose of Counter-Insurgency"), Stuart Hall ("Cultural Studies: Two Paradigms"), Susan Harding ("The Born-Again Telescandals"), Donna Haraway ("Teddy Bear Patriarchy"), Dick Hebdige ("After the Masses"), Susan McClary ("Living to Tell: Madonna's Resurrection of the Fleshly"), Sherry B. Ortner ("Theory in Anthropology since the Sixties"), Marshall Sahlins ("Cosmologies of Capitalism"), Elizabeth G. Traube ("Secrets of Success in Postmodern Society"), Raymond Williams (selections from Marxism and Literature ), and Judith Williamson ("Family, Education, Photography").
Advancing from statistical associations of complex traits with genetic markers to understanding the functional genetic variants that influence traits is often a complex process. Fine-mapping can ...select and prioritize genetic variants for further study, yet the multitude of analytical strategies and study designs makes it challenging to choose an optimal approach. We review the strengths and weaknesses of different fine-mapping approaches, emphasizing the main factors that affect performance. Topics include interpreting results from genome-wide association studies (GWAS), the role of linkage disequilibrium, statistical fine-mapping approaches, trans-ethnic studies, genomic annotation and data integration, and other analysis and design issues.
When cooled or pressurized, polymer melts exhibit a tremendous reduction in molecular mobility. If the process is performed at a constant rate, the structural relaxation time of the liquid eventually ...exceeds the time allowed for equilibration. This brings the system out of equilibrium, and the liquid is operationally defined as a glass-a solid lacking long-range order. Despite almost 100 years of research on the (liquid/)glass transition, it is not yet clear which molecular mechanisms are responsible for the unique slow-down in molecular dynamics. In this review, we first introduce the reader to experimental methodologies, theories, and simulations of glassy polymer dynamics and vitrification. We then analyse the impact of connectivity, structure, and chain environment on molecular motion at the length scale of a few monomers, as well as how macromolecular architecture affects the glass transition of non-linear polymers. We then discuss a revised picture of nanoconfinement, going beyond a simple picture based on interfacial interactions and surface/volume ratio. Analysis of a large body of experimental evidence, results from molecular simulations, and predictions from theory supports, instead, a more complex framework where other parameters are relevant. We focus discussion specifically on local order, free volume, irreversible chain adsorption, the Debye-Waller factor of confined and confining media, chain rigidity, and the absolute value of the vitrification temperature. We end by highlighting the molecular origin of distributions in relaxation times and glass transition temperatures which exceed, by far, the size of a chain. Fast relaxation modes, almost universally present at the free surface between polymer and air, are also remarked upon. These modes relax at rates far larger than those characteristic of glassy dynamics in bulk. We speculate on how these may be a signature of unique relaxation processes occurring in confined or heterogeneous polymeric systems.
This review summarizes the case for investing in adolescence as a period of rapid growth, learning, adaptation, and formational neurobiological development. Adolescence is a dynamic maturational ...period during which young lives can pivot rapidly-in both negative and positive directions. Scientific progress in understanding adolescent development provides actionable insights into windows of opportunity during which policies can have a positive impact on developmental trajectories relating to health, education, and social and economic success. Given current global changes and challenges that affect adolescents, there is a compelling need to leverage these advances in developmental science to inform strategic investments in adolescent health.
COVID-19 emerged in November 2019 leading to a global pandemic that has not only resulted in widespread medical complications and loss of life, but has also impacted global economies and transformed ...daily life. The current rapid response study in a convenience online sample quickly recruited 2,065 participants across the United States, Canada, and Europe in late March and early April 2020. Cross-sectional findings indicated elevated anxiety and depressive symptoms compared to historical norms, which were positively associated with COVID-19 concern more strongly than epidemiological data signifying risk (e.g., world and country confirmed cases). Employment loss was positively associated with greater depressive symptoms and COVID-19 concern, and depressive symptoms and COVID-19 concern were significantly associated with more stringent self-quarantine behavior. The rapid collection of data during the early phase of this pandemic is limited by under-representation of non-White and middle age and older adults. Nevertheless, these findings have implications for interventions to slow the spread of COVID-19 infection.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Wrist-worn smart watches and fitness monitors (ie, wearables) have become widely adopted by consumers and are gaining increased attention from researchers for their potential contribution to ...naturalistic digital measurement of health in a scalable, mobile, and unobtrusive way. Various studies have examined the accuracy of these devices in controlled laboratory settings (eg, treadmill and stationary bike); however, no studies have investigated the heart rate accuracy of wearables during a continuous and ecologically valid 24-hour period of actual consumer device use conditions.
The aim of this study was to determine the heart rate accuracy of 2 popular wearable devices, the Apple Watch 3 and Fitbit Charge 2, as compared with the gold standard reference method, an ambulatory electrocardiogram (ECG), during consumer device use conditions in an individual. Data were collected across 5 daily conditions, including sitting, walking, running, activities of daily living (ADL; eg, chores, brushing teeth), and sleeping.
One participant, (first author; 29-year-old Caucasian male) completed a 24-hour ecologically valid protocol by wearing 2 popular wrist wearable devices (Apple Watch 3 and Fitbit Charge 2). In addition, an ambulatory ECG (Vrije Universiteit Ambulatory Monitoring System) was used as the gold standard reference method, which resulted in the collection of 102,740 individual heartbeats. A single-subject design was used to keep all variables constant except for wearable devices while providing a rapid response design to provide initial assessment of wearable accuracy for allowing the research cycle to keep pace with technological advancements. Accuracy of these devices compared with the gold standard ECG was assessed using mean error, mean absolute error, and mean absolute percent error. These data were supplemented with Bland-Altman analyses and concordance class correlation to assess agreement between devices.
The Apple Watch 3 and Fitbit Charge 2 were generally highly accurate across the 24-hour condition. Specifically, the Apple Watch 3 had a mean difference of -1.80 beats per minute (bpm), a mean absolute error percent of 5.86%, and a mean agreement of 95% when compared with the ECG across 24 hours. The Fitbit Charge 2 had a mean difference of -3.47 bpm, a mean absolute error of 5.96%, and a mean agreement of 91% when compared with the ECG across 24 hours. These findings varied by condition.
The Apple Watch 3 and the Fitbit Charge 2 provided acceptable heart rate accuracy (<±10%) across the 24 hour and during each activity, except for the Apple Watch 3 during the daily activities condition. Overall, these findings provide preliminary support that these devices appear to be useful for implementing ambulatory measurement of cardiac activity in research studies, especially those where the specific advantages of these methods (eg, scalability, low participant burden) are particularly suited to the population or research question.
Regularities are gradually represented in cortex after extensive experience 1, and yet they can influence behavior after minimal exposure 2, 3. What kind of representations support such rapid ...statistical learning? The medial temporal lobe (MTL) can represent information from even a single experience 4, making it a good candidate system for assisting in initial learning about regularities. We combined anatomical segmentation of the MTL, high-resolution fMRI, and multivariate pattern analysis to identify representations of objects in cortical and hippocampal areas of human MTL, assessing how these representations were shaped by exposure to regularities. Subjects viewed a continuous visual stream containing hidden temporal relationships—pairs of objects that reliably appeared nearby in time. We compared the pattern of blood oxygen level-dependent activity evoked by each object before and after this exposure, and found that perirhinal cortex, parahippocampal cortex, subiculum, CA1, and CA2/CA3/dentate gyrus (CA2/3/DG) encoded regularities by increasing the representational similarity of their constituent objects. Most regions exhibited bidirectional associative shaping, whereas CA2/3/DG represented regularities in a forward-looking predictive manner. These findings suggest that object representations in MTL come to mirror the temporal structure of the environment, supporting rapid and incidental statistical learning.
Display omitted
► Voxel patterns provide a window into how MTL represents object regularities ► Incidental exposure to objects paired in time increases similarity of their patterns ► Such changes occur in both cortical areas and hippocampal subfields of human MTL ► Regularities are represented in a forward-looking predictive manner in CA2/3/DG
There is robust evidence of an association between insomnia, anxiety, and depression in adolescence. The aim of this review is to describe and synthesize potential mechanisms underlying this ...association and explore implications for the design of adolescent behavioral sleep interventions. Specifically, we examine whether insomnia symptoms are a mechanism for the development of internalizing symptoms in adolescence and whether sleep interventions are an effective treatment for both insomnia and internalizing symptoms in adolescence because they target the shared mechanisms underlying these disorders. Research using different methodologies points to the role of sequential, parallel, and interacting mechanisms. In this paper, we review a wide range of relevant biological (i.e., polymorphisms and dysregulation in serotonin, dopamine, and circadian clock genes; alterations in corticolimbic and mesolimbic brain circuits; cortisol reactivity to stress; inflammatory cytokine dysregulation; biased memory consolidation; changes in sleep architecture), psychological (i.e., cognitive inflexibility, interpretational biases, judgment biases, negative attribution styles, worry, rumination, biased attention to threat, dysfunctional beliefs and attitudes about sleep, misperception of sleep deficit), and social mechanisms (i.e., reduced and impaired social interactions, unhelpful parenting behaviors, family stress) and propose an integrative multilevel model of how these phenomena may interact to increase vulnerability to both insomnia and internalizing disorders. Several ‘biopsychosocial’ mechanisms hold promise as viable treatment targets for adolescent behavioral sleep interventions, which may reduce both insomnia and internalizing symptoms.
•Biological, psychological, and social mechanisms underlie insomnia, anxiety, and depression in adolescence•Biological mechanisms include genetic, brain, cortisol, cytokine, memory, and sleep architecture dysregulation•Psychological mechanisms include cognitive/attention biases and dysfunctional beliefs and attitudes about sleep•Social mechanisms include reduced/impaired social interactions, unhelpful parenting behaviors, and family stress•We propose a multilevel model of how these mechanisms interact and explore implications for adolescent sleep interventions
The physiological demands of marathon and ultra-marathon running are substantial, affecting multiple body systems. There have been several reviews on the physiological contraindications of ...participation; nevertheless, the respiratory implications have received relatively little attention. This paper provides an up-to-date review of the literature pertaining to acute pulmonary and respiratory muscle responses to marathon and ultra-marathon running. Pulmonary function was most commonly assessed using spirometry, with infrequent use of techniques including single-breath rebreathe and whole-body plethysmography. All studies observed statistically significant post-race reductions in one-or-more metrics of pulmonary function, with or without evidence of airway obstruction. Nevertheless, an independent analysis revealed that post-race values rarely fell below the lower-limit of normal and are unlikely, therefore, to be clinically significant. This highlights the virtue of healthy baseline parameters prior to competition and, although speculative, there may be more potent clinical manifestations in individuals with below-average baseline function, or those with pre-existing respiratory disorders (e.g., asthma). Respiratory muscle fatigue was most commonly assessed indirectly using maximal static mouth-pressure manoeuvres, and respiratory muscle endurance via maximum voluntary ventilation (MVV
12
). Objective nerve-stimulation data from one study, and others documenting the time-course of recovery, implicate peripheral neuromuscular factors as the mechanism underpinning such fatigue. Evidence of respiratory muscle fatigue was more prevalent following marathon compared to ultra-marathon, and might be a factor of work rate, and thus exercise ventilation, which is tempered during longer races. Potential implications of respiratory muscle fatigue on health and marathon/ultra-marathon performance have been discussed, and include a diminished postural stability that may increase the risk of injury when running on challenging terrain, and possible respiratory muscle fatigue-induced effects on locomotor limb blood flow. This review provides novel insights that might influence marathon/ultra-marathon preparation strategies, as well as inform medical best-practice of personnel supporting such events.
PDF
