Movatterモバイル変換

In the ground-breaking 2018 judgment of Navtej Singh Johar v. Union of India, the Hon'ble Supreme Court of India ushered in a new era by decriminalizing homosexuality, marking a pivotal moment in the country's legal history. However, this progressive stride was accompanied by persistent questions concerning homosexual rights that remained unexplored within both cultural and legal frameworks. Despite the legal acknowledgment, members of the homosexual community are often professed merely as 'individuals' and not fully integrated into mainstream society. This perception (...) is aggravated by the absence of a societal 'stamp of marriage,' reinforcing their marginalization. In the realm of Hindu law, the sanctity of marriage is deeply rooted in the scriptures, which explicitly define it as the union of 'two souls.' Remarkably, these very scriptures also assert that a soul is inherently without gender, elucidating that gender is a characteristic exclusive to the human body. It is crucial to recognize that Hindu law, including the relevant Acts, draws extensively from these scriptures, making them a fundamental source of legal principles. The legislation, such as the Hindu Marriage Act, essentially serves to codify and organize the pre-existing Hindu law without seeking to undermine the intrinsic values enshrined within the Holy Scriptures. This article aims to delve into the unaddressed aspects of homosexual rights within the contemporary legal framework, shedding light on the denied rights that persist. While global attitudes are progressing towards recognizing and safeguarding homosexual rights, the Indian government and cultural factors appear hesitant to renounce orthodox and conservative stances. This article seeks to analyse and critique these aspects, exploring the challenges hindering the full acceptance and integration of homosexual individuals into the broader societal fabric despite the transformative legal landscape initiated by the Navtej Singh Johar case. (shrink)

Direct download(2 more)   Export citation   Bookmark  

In responding to this debate,Ananth both surveys the existing literature, with special focus on the work of Christopher Boorse, and argues that a naturalistic ...

Direct download   Export citation   Bookmark   19 citations  

Jonathan Lear argues that the established purgation, purification, and cognitive stimulation interpretations of Aristotle’s concepts of catharsis and tragic pleasure are off the mark. In response, Lear defends an anti-cognitivist account, arguing that it is the pleasure associated with imaginatively “living life to the full” and yet hazarding nothing of importance that captures Aristotle’s understanding of catharsis and tragic pleasure. This analysis reveals that Aristotle’s account of imagination in conjunction with his understanding of both specific intellectual virtues and rational emotions (...) of an educated citizen not only tells against Lear’s anti-cognitivist construal, but also divulges an alternative cognitive stimulation reading. (shrink)

Direct download   Export citation   Bookmark   2 citations  

Albert Jonsen and Stephen Toulmin have argued that the best way to resolve complex “moral” issues in clinical settings is to focus on the details of specific cases. This approach to medical decision-making, labeled ‘casuistry’, has met with much criticism in recent years. In response to this criticism, Carson Strong has attempted to salvage much of Jonsen’s and Toulmin’s version of casuistry. He concludes that much of their analysis, including Jonsen’s further elaboration about the casuistic methodology, is on the mark. (...) In this essay, the details of Jonsen’s and Toulmin’s version of casuistry and the major criticisms against their approach to clinical decision-making are explicated. Furthermore, it is argued that Strong’s salvage efforts fail to deflect these criticisms. The upshot of this analysis, which includes a few additional criticisms, is that Jonsen’s and Toulmin’s version of casuistry is not an appropriate framework from which to resolve complex “moral” issues in clinical settings. (shrink)

Direct download   Export citation   Bookmark  

This paper defends the position that the supposed gap between biological altruism and psychological altruism is not nearly as wide as some scholars (e.g., Elliott Sober) insist. Crucial to this defense is the use of James Mark Baldwin's concepts of “organic selection”and “social heredity” to assist in revealing that the gap between biological and psychological altruism is more of a small lacuna. Specifically, this paper argues that ontogenetic behavioral adjustments, which are crucial to individual survival and reproduction, are also crucial (...) to species survival. In particular, it is argued that human psychological altruism is produced and maintained by various sorts of mimicry and self-reflection in the aid of both individual and species survival. The upshot of this analysis is that it is possible to offer an account of psychological altruism that is closelytethered to biological altruism without reducing entirely the former to thelatter. (shrink)

Direct download(3 more)   Export citation   Bookmark   5 citations  

No categories

Direct download(2 more)   Export citation   Bookmark  

Export citation   Bookmark  

_Bringing Biology to Life _is a guided tour of the philosophy of biology, canvassing three broad areas: the early history of biology, from Aristotle to Darwin; traditional debates regarding species, function, and units of selection; and recent efforts to better understand the human condition in light of evolutionary biology. Topics are addressed using no more technical jargon than necessary, and without presupposing any advanced knowledge of biology or the philosophy of science on the part of the reader. Discussion questions are (...) also provided to encourage reader reflection. (shrink)

Direct download(2 more)   Export citation   Bookmark   3 citations  

Both before and after the publication of Isaac Newton’s particulate theory of light, numerous wave theories of light were advanced by both philosophers and scientists (e.g., René Descartes, Thomas Hobbes, Robert Hooke, Francesco Grimaldi, and Christiaan Huygens). What is peculiar about this list, as frequently found in the scholarly literature on light, is that it refers to individuals who do not extend much further back than the seventeenth century. A close examination of Aristotle’s account of color and light in comparison (...) to Christiann Huygens’ theory of color and light, however, reveals that Aristotle deserves to be recognized as one who antedates and foreshadows these modern wave theorists. Indeed, we shall argue that Aristotle offered the first wave theory of color and light. On Aristotle’s theory, light is the actualization of a transparent medium such as air or water that makes possible the dissemination of color through the medium in a manner analogous to the dissemination of sound through air or water. (shrink)

Direct download(2 more)   Export citation   Bookmark  

Vedānta is one of the oldest philosophical systems. While there are many detailed commentaries on Vedānta, there are very few mathematical descriptions of the different concepts developed there. This article shows how ideas from theoretical computer science can be used to explain Vedānta. The standard ideas of transition systems and modal logic are used to develop a formal description for the different ideas in Vedānta. The generality of the formalism is illustrated via a number of examples including saṃsāra, Patañjali’s Yogasūtras, (...) karma, the three avasthās from the Māṇḍūkya Upaniṣad and the key difference between advaita and dvaita in relation to mokṣa. (shrink)

Direct download(2 more)   Export citation   Bookmark  

The contemporary debate on the concept of health is a tug-of-war between naturalists and normativists. Although health can be valued or disvalued, naturalists argue that the concept of health is value-free. In contrast, normativists argue that the concept of health is value-laden. This dissertation examines this controversy focusing on the naturalistic concept of health defended by Christopher Boorse. Boorse claims that health and disease are value-free concepts in the sense that diseased and healthy states can be gleaned from the facts (...) of nature without an appeal to value judgments. ;The dissertation first examines Boorse's critical assessment of both the naturalist and normativist concepts of health that he rejects. Then there is a critical examination of the concept of function, which is crucial to his concept of health. Subsequently, an exegesis of Boorse's concept of health is provided. This is followed by an evaluation of the many replies by his critics and Boorse's rejoinder to them. Finally, a modified version of Boorse's concept of health is proposed taking into account some of the intractable difficulties with his theory. ;There are six main findings regarding Boorse's theory: First, Boorse successfully rejects the main normative concepts of health. Second, he is partially successful against specific naturalistic concepts of health. Third, Boorse's contextualist concept of function is not entirely persuasive. Fourth, Boorse's concept of health is persuasive because he qualifies it to accommodate differences in age, gender, and species type. Fifth, with respect to his critics, Boorse is inconsistent in his reliance on evolution and does not give a proper place to the environment in his account. Sixth, a modified version of Boorse's concept of health, which includes an evolutionary sense of function, homeostasis, and acknowledges environmental factors , is a more appropriate way to understand health. ;This dissertation arrives at three major conclusions: First, Boorse's concept of health is mainly successful in response to the normativists, but he should concede that epistemic norms are part of his concept of health. Second, an evolutionary concept of function is superior to Boorse's part-functionalist account. Third, a prominent place should be given to both homeostasis and environmental factors, along with the factors of age, sex, and species mentioned by Boorse. A modification of Boorse's account reflecting these conclusions will be a more defensible naturalistic concept of health. (shrink)

Export citation   Bookmark  

Direct download   Export citation   Bookmark  

The action for a massive particle in special relativity can be expressed as the invariant proper length between the end points. In principle, one should be able to construct the quantum theory for such a system by the path integral approach using this action. On the other hand, it is well known that the dynamics of a free, relativistic, spinless massive particle is best described by a scalar field which is equivalent to an infinite number of harmonic oscillators. We clarify (...) the connection between these two—apparently dissimilar—approaches by obtaining the Green function for the system of oscillators from that of the relativistic particle. This is achieved through defining the path integral for a relativistic particle rigorously by two separate approaches. This analysis also shows a connection between square root Lagrangians and the system of harmonic oscillators which is likely to be of value in more general context. (shrink)

Direct download(3 more)   Export citation   Bookmark  

The (Feynman) propagator G(x2,x1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G(x_2,x_1)$$\end{document} encodes the entire dynamics of a massive, free scalar field propagating in an arbitrary curved spacetime. The usual procedures for computing the propagator—either as a time ordered correlator or from a partition function defined through a path integral—requires introduction of a field ϕ(x)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\phi (x)$$\end{document} and its action functional A[ϕ(x)]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$A[\phi (x)]$$\end{document}. (...) An alternative, more geometrical, procedure is to define a propagator in terms of the world-line path integral which only uses curves, xi(s)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$x^i(s)$$\end{document}, defined on the manifold. I show how the world-line path integral can be reinterpreted as an ordinary integral by introducing the concept of effective number of quantum paths of a given length. Several manipulations of the world-line path integral becomes algebraically tractable in this approach. In particular I derive an explicit expression for the propagator GQG(x2,x1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\mathrm{QG}(x_2,x_1)$$\end{document}, which incorporates the quantum structure of spacetime through a zero-point-length, in terms of the standard propagator Gstd(x2,x1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$G_\mathrm{std}(x_2,x_1)$$\end{document}, in an arbitrary curved spacetime. This approach also helps to clarify the interplay between the path integral amplitude and the path integral measure in determining the form of the propagator. This is illustrated with several explicit examples. (shrink)

No categories

Direct download(3 more)   Export citation   Bookmark  

German philosopher G. W. F. Hegel problematized the term “aesthetics” in his writings on art. This article attempts to capture the tension between Hegel's theory of art and philosophy of art and its impact on the subsequent theorization of art in the twentieth century as consumer or emancipatory. Music, poetry and plastic arts seem to resonate differently with philosophers such as Plato, Aristotle, Kant, Hegel and Adorno. Plato considered music soothing to the soul. In Aristotle, one could trace the oblique (...) beginnings of the tension between a theory of art and a philosophy of art as he questioned the role of art in philosophy. While Kant's approach is more formal and deals with concepts such as beauty, sublime, genius, and the status of aesthetic objects, Hegel grapples with the rational and emotional aspects of works of art which determine whether art is free or under the thralldom of nature. Both Kant and Hegel distinguished artistic from natural beauty. Critical theorists such as Adorno were also influenced by Hegel. Adorno's analysis of concepts such as mimesis forms an important part of his critique of culture industry. Adorno was also emphatic that classical art could only exist as a product of an epoch. Yet in its dialectical form, art serves as a critique of ideology. Progressively, from the nineteenth to the twentieth century, what began as a crevice between a philosophy of art and a theory of art became a chasm. Thus, begins a contentious relationship between art as a pursuit in itself and art for consumption, that is, art as an integral aspect of consumer culture. The new phenomenon of AI art also poses interesting questions about the paradigmatic shift in dynamics between human element and technology. This article would also attempt to trace how art continues to defy reification, while in the process being consumed constantly, recreating and reinventing itself. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark   1 citation  

Overview of the global warming/climate change debate.

Direct download   Export citation   Bookmark   1 citation  

Defenders of evolutionary medicine claim that medical professionals and public health officials would do well to consider the role of evolutionary biology with respect to the teaching, research, and judgments pertaining to medical theory and practice. An integral part of their argument is that the human body should be understood as a bundle of evolutionary compromises. Such an appreciation, which includes a proper understanding of biological function and physiological homeostasis, would provide a crucial perspective regarding the understanding and securing of (...) human health needs currently lacking in the medical arena. (shrink)

Direct download(2 more)   Export citation   Bookmark  

John Searle offers what he thinks to be a reasonable scientific approach to the understanding of consciousness. I argue that Searle is demanding nothing less than a Kuhnian-type revolution with respect to how scientists should study consciousness given his rejection of the subject-object distinction and affirmation of mental causation. As part of my analysis, I reveal that Searle embraces a version of emergentism that is in tension, not only with his own account, but also with some of the theoretical tenets (...) of science. I conclude that Searle has offered little to motivate scientists to adopt his proposal. (shrink)

Direct download   Export citation   Bookmark  

No categories

Direct download   Export citation   Bookmark  

In a recent commentary, Kim and colleagues argued that minimal-risk research should be deregulated so that such studies do not require review by an institutional review board. They claim that regulation of minimal-risk studies provides no adequate counterbalancing good and instead leads to a costly human subjects oversight system. We argue that the counterbalancing good of regulating minimal-risk studies is that oversight exists to ensure that respect for persons and justice requirements are satisfied when they otherwise might not be.

Direct download(3 more)   Export citation   Bookmark  

Superman’s legendary powers include super‐strength, super‐speed, flight, invulnerability, x‐ray vision, heat vision, and super‐hearing. One would think those powers would be enough, but occasionally writers add new ones. This chapter considers one of his less common powers‐the ability to read minds‐and use some basic philosophical thinking about minds to ask why it never caught on as one of Supes's main powers. The chapter explains why, despite mind‐reading’s occasional usefulness, it would be philosophically prudent to eliminate it from Superman’s set of (...) powers. Given that Superman was born on Krypton and raised on Earth, there is no reason to think that he should be confident in guessing the mental states of other beings. (shrink)

No categories

Direct download   Export citation   Bookmark  

Direct download(4 more)   Export citation   Bookmark   1 citation  

No categories

Export citation   Bookmark  

Direct download(3 more)   Export citation   Bookmark  

No categories

Direct download(2 more)   Export citation   Bookmark  

This article addresses the problem of two extreme positions in the self-understanding of human beings namely ignoring culture or its over-determination. Though Charles Taylor and Antonio Gramsci are widely known to differ from each other in many respects, we endeavor a congruent reading to evolve a comprehensive perspective. We make avail of their concepts, such as background, horizon, and common sense, to comprehend the nature of the culturally constituted self and its relevance for education. For both Taylor and Gramsci, the (...) human self is situated in a cultural framework. Though the relation between self and culture is constitutive and inevitable, culture does not entirely determine or overshadow the self. This stance gives space for upholding freedom, dignity and liberation of the human self in both of them. While preserving the essential role of culture in the formation of the human self, education must not be reduced to identity politics. Education must incorporate culture, be critical of it and pay attention to forming a critical self. (shrink)

Direct download(2 more)   Export citation   Bookmark  

In this paper we show how defeasible logic could formally account for the non-monotonic properties involved in motivational attitudes like intention and obligation. Usually, normal modal operators are used to represent such attitudes wherein classical logical consequence and the rule of necessitation comes into play, i.e., ⊢A/⊢ □A, that is from ⊢A derive ⊢ □A. This means that such formalisms are affected by the Logical Omniscience problem. We show that policy-based intentions exhibit non-monotonic behaviour which could be captured through a (...) non-monotonic system like defeasible logic. To this end we outline a defeasible logic of intention that specifies how modalities can be introduced and manipulated in a non-monotonic setting without giving rise to the problem of logical omniscience. In a similar way we show how to add deontic modalities defeasibly and how to integrate them with other motivational attitudes like beliefs and goals. Finally we show that the basic aspect of the BOID architecture is captured by this extended framework. (shrink)

Direct download(3 more)   Export citation   Bookmark   7 citations  

Direct download(3 more)   Export citation   Bookmark  

Book Review of Brian Fay's Contemporary Philosophy of Social Science.

Direct download(3 more)   Export citation   Bookmark  

This book examines the idea of cosmopolitanism, its reconceptualisations and critiques. It explores the specific institutional and philosophical challenges in constructing a cosmopolitan political community and critically engages with assumptions about the nature and direction of global politics. The volume presents a post-colonial critique of 'Western' cosmopolitanism and suggests alternative frameworks.

Direct download   Export citation   Bookmark   1 citation  

No categories

Direct download(2 more)   Export citation   Bookmark  

Direct download   Export citation   Bookmark  

We examine managers’ earnings forecasts for evidence of incentive alignment or subversion characteristics. We find that forecasts by managers compensated via relative performance (RP) goals are more likely to be pessimistic and less accurate than those by managers compensated via absolute performance (AP) goals. For firms not issuing earnings forecasts, disclosures in Form 10-Ks are more pessimistic for RP firms than for AP firms. Furthermore, we find that RP firms perform worse than AP firms in terms of future stock returns. (...) Overall, our evidence is consistent with a proposition that, contrary to sound ethical business practices, RP managers make self-serving earnings disclosures to subvert the efforts of their peers to meet performance targets more easily. (shrink)

Direct download(3 more)   Export citation   Bookmark  

Direct download(3 more)   Export citation   Bookmark  

Theoretical and experimental studies on prey–predator systems where predator is supplied with alternate sources of food have received significant attention over the years due to their relevance in achieving biological conservation and biological control. Some of the outcomes of these studies suggest that with appropriate quality and quantity of additional food, the system can be steered towards any desired state eventually with time. One of the limitations of previous studies is that the desired state is reached asymptotically, which makes the (...) outcomes not easily applicable in practical scenarios. To overcome this limitation, in this work, we formulate and study optimal control problems to achieve the desired outcomes in minimum (finite) time. We consider two different models of additional food provided prey–predator systems involving Holling type IV functional response (with inhibitory effect of prey). In the first scenario, additional food is incorporated implicitly into the predator’s functional response with a possibility of achieving biological conservation through co-existence of species and biological control by maintaining prey at a level that is least harmful to the system. In the second, the effect of additional food is incorporated explicitly into the predator’s compartment with the goal of pest management by maintaining prey density at a very minimal damaging level. For both cases, appropriate optimal control strategies are derived and the theoretical findings are illustrated by numerical simulations. We also discuss the ecological significance of the theoretical findings for both models. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark  

Agrobiodiversity is an evident outcome of a long-lasting human–nature relationship, as the continuous use, conservation and management of crops has resulted in biological as well as cultural diversity of seeds and breeds. This paper aims to understand the interlocking of formal and informal seed supply routes by considering the dynamic flow of seeds within networks across the intersections of gender, ethnicity and age in South India as social categories structuring human–nature relations. This changing relationship under formal and informal institutional settings (...) has consequences on performance for men and women in rice seed systems. Undertaking an empirical analysis of the organization of seed management and exchange, we seek to shed light on the gendered organization of agrobiodiversity as a social network. The study builds on Net-Map interviews conducted in 2012, embedded in the larger BioDIVA project in the district of Wayanad in Kerala, India. Based on network analysis, the interactive method employed has enabled identification of important actors in the seed system and the characteristics of their relationships. We look into the gendered structure of information exchange regarding seed varieties and actual seed transactions, while also examining clusters of actors collaborating regarding seed supply. Finally, we identify the institutional gap concerning seed sources left by formal and informal institutions, like the availability of varieties. We show how informal and formal seed systems coexist and overlap due to actors moving between systems and argue that the degree and areas of overlap are shaped by gendered human–nature relations. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark   2 citations  

Direct download(3 more)   Export citation   Bookmark  

This is a book review/critical review of Jackson and Depew's _Darwinism, Democracy, and Race: American Anthropology and Evolutionary Biology in the Twentieth Century_.

Direct download   Export citation   Bookmark  

Direct download(4 more)   Export citation   Bookmark  

No categories

Direct download(2 more)   Export citation   Bookmark  

Infectious disease outbreaks in residential care are complex to manage and difficult to control. Research in this setting that includes individuals who lack capacity must conform to national legislation. We report here on our study that is investigating outbreaks of scabies, an itchy skin infection, in the residential care setting in the southeast of England. There appears to be a gap in legislative advice regarding the inclusion of people who lack capacity in research that takes place during time-limited acute scenarios (...) such as outbreaks. We received inconsistent advice from experts regarding, in particular, the role of nominated consultees. There is a potential inequality for vulnerable populations who cannot themselves provide informed consent in terms of their access to participation in a range of health-related research. (shrink)

Direct download(3 more)   Export citation   Bookmark   4 citations  

Migrant farmworkers dominate the horticultural workforce in many parts of the Minority (developed) World. The ‘manual’ work that they do—picking and packing fruits and vegetables, and pruning vines and trees—is widely designated unskilled. In policy, media, academic, activist and everyday discourses, hired farm work is framed as something anybody can do. We interrogate this notion with empirical evidence from the Sunraysia horticultural region of Australia. The region’s grape and almond farms depend heavily on migrant workers. By-and-large, the farmers and farmworkers (...) we spoke to pushed back against the unskilled tag. They asserted that farmworkers acquire knowledge and skills over time and that experienced farmworkers are valuable—their value being brought into sharp relief against accounts of inexperienced farmworkers’ errors. Our interviewees provided rich insights into farmworkers’ engagements with crops and the intricacies of picking and pruning well. Far from being bereft of knowledge and skills, they recognised that experienced farmworkers bring benefits. They improve productivity, product quality and ultimately profits. This is especially so when open communication channels exist across the farm hierarchy, when experienced farmworkers’ insights are taken seriously by their employers. Our research is informed by organisational studies literature and scholarship on craft/making. Like factory floor workers and artisans, experienced farmworkers bring accumulated knowledge and skills to their work, gained through repeat performance. They reflect on and adjust their activities in dialogue with their materials and the environment. Experienced farmworkers demonstrate care, dexterity and judgement. They are not unskilled, and they are more than labouring bodies. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark   3 citations  

Trafficking and persistence of fetal microchimeric cells (fMCs) and circulating extracellular vesicles (EVs) have been observed in animals and humans, but their consequences in the maternal body and their mechanistic contributions to maternal physiology and pathophysiology are not yet fully defined. Fetal cells and EVs may help remodel maternal organs after pregnancy‐associated changes, but the cell types and EV cargos reaching the mother in preterm pregnancies after exposure to various risk factors can be distinct from term pregnancies. As preterm delivery‐associated (...) maternal complications are rising, revisiting this topic and formulating scientific questions for future research to reduce the risk of maternal morbidities are timely. Epidemiological studies report maternal cardiovascular risk as one of the major complications after preterm delivery. This paper suggests a potential link between fMCs and circulating EVs and adverse maternal cardiovascular outcomes post‐pregnancies, the underlying mechanisms, consequences, and methods for and how this link might be assessed. (shrink)

Direct download(2 more)   Export citation   Bookmark  

Quantum theories constructed on the noncommutative spacetime called the Groenewold–Moyal plane exhibit many interesting properties such as Lorentz and CPT noninvariance, causality violation and twisted statistics. We show that such violations lead to many striking features that may be tested experimentally. These theories predict Pauli forbidden transitions due to twisted statistics, anisotropies in the cosmic microwave background radiation due to correlations of observables in spacelike regions and Lorentz and CPT violations in scattering amplitudes.

Direct download(4 more)   Export citation   Bookmark  

We report on the small-scale (0.5 13 h - 1M, a large-scale bias of ~2.0 and a satellite fraction of 12 ± 2 per cent. Thus, these galaxies occupy haloes with average masses in between those of the higher redshift BOSS CMASS sample and the original SDSS I/II luminous red galaxy sample © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society © doi:10.1093/mnras/sts314.

No categories

Direct download(2 more)   Export citation   Bookmark  

The COVID-19 pandemic has resulted in more than 524 million cases and 6 million deaths worldwide. Various drug interventions targeting multiple stages of COVID-19 pathogenesis can significantly reduce infection-related mortality. The current within-host mathematical modeling study addresses the optimal drug regimen and efficacy of combination therapies in the treatment of COVID-19. The drugs/interventions considered include Arbidol, Remdesivir, Interferon and Lopinavir/ritonavir. It is concluded that these drugs, when administered singly or in combination, reduce the number of infected cells and viral load. (...) Four scenarios dealing with the administration of a single drug, two drugs, three drugs and all four are discussed. In all these scenarios, the optimal drug regimen is proposed based on two methods. In the first method, these medical interventions are modeled as control interventions and a corresponding objective function and optimal control problem are formulated. In this framework, the optimal drug regimen is derived. Later, using the comparative effectiveness method, the optimal drug regimen is derived based on the basic reproduction number and viral load. The average number of infected cells and viral load decreased the most when all four drugs were used together. On the other hand, the average number of susceptible cells decreased the most when Arbidol was administered alone. The basic reproduction number and viral load decreased the most when all four interventions were used together, confirming the previously obtained finding of the optimal control problem. The results of this study can help physicians make decisions about the treatment of the life-threatening COVID-19 infection. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark  

In this paper we take a fresh look at the information retrieval problem of balancing recall with precision in electronic document extraction. We examine the IR constructs of uncertainty, context and relevance, proposing a new process model for context learning, and introducing a new IT artifact designed to support user driven learning by leveraging explicit knowledge to discover implicit knowledge within a corpus of documents. The IT artifact is a prototype designed to present a small set of extracted documents from (...) a targeted corpus based upon user inputted criteria. The prototype provides the user with the opportunity to balance exploration and exploitation, via iterative relevance feedback to address the problem of imprecision resulting from uncertainty. We model the problem as an exploration–exploitation dilemma and apply it to a specific case of IR called eDiscovery. We conduct a series of behavioral experiments to evaluate the model and the artifact. Our initial findings indicate that the proposed model and the artifact improve performance in the IR result. (shrink)

Direct download(2 more)   Export citation   Bookmark   1 citation  

We present a one per cent measurement of the cosmic distance scale from the detections of the baryon acoustic oscillations in the clustering of galaxies from the Baryon Oscillation Spectroscopic Survey, which is part of the Sloan Digital Sky Survey III. Our results come from the Data Release 11 sample, containing nearly one million galaxies and covering approximately 8500 square degrees and the redshift range 0.2< z< 0.7. We also compare these results with those from the publicly released (...) DR9 and DR10 samples. Assuming a concordance Λ cold dark matter cosmological model, the DR11 sample covers a volume of 13 Gpc3 and is the largest region of the Universe ever surveyed at this density. We measure the correlation function and power spectrum, including density-field reconstruction of the BAO feature. The acoustic features are detected at a significance of over 7σ in both the correlation function and power spectrum. Fitting for the position of the acoustic features measures the distance relative to the sound horizon at the drag epoch, rd, which has a value of rd,fid = 149.28 Mpc in our fiducial cosmology. We find DV = at z = 0.32 and DV = at z = 0.57. At 1.0 per cent, this latter measure is the most precise distance constraint ever obtained from a galaxy survey. Separating the clustering along and transverse to the line of sight yields measurements at z = 0.57 of DA = and H =. Our measurements of the distance scale are in good agreement with previous BAO measurements and with the predictions from cosmic microwave background data for a spatially flat CDM model with a cosmological constant. © 2014 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. (shrink)

No categories

Direct download(2 more)   Export citation   Bookmark   1 citation  

Direct download(3 more)   Export citation   Bookmark  

No categories

Direct download(3 more)   Export citation   Bookmark