Using an innovative workflow incorporating microseismic attributes and geomechanical well logs, we have defined major geomechanical drivers of microseismic expression to understand reservoir stimulation response in an engineering/geologic context. We sampled microseismic data from two hydraulically fractured Marcellus wells in the Appalachian Basin, West Virginia, vertically through the event cloud, crossing shale, limestone, sandstone, and chert. We focused our analysis on the Devonian organic shale and created pseudologs of moment magnitude Mw, b-value, and event count. The vertical moving-average sampling of (...) microseismic data was completed such that the sample interval matched that of the geophysical well log. This technique creates robust, high-resolution microseismic logs that indicate subtle changes in microseismic properties and allow direct crossplotting of microseismic versus geophysical logs. We chose five geomechanical properties to form the framework against which to interrogate the microseismic data: Young’s modulus, Poisson’s ratio, brittleness, lambda-rho, and mu-rho. In addition, we included gamma as a useful measure of organic content. Having defined this microseismic-geomechanical crossplot space, we derived insights into the response of these units during hydraulic fracturing. Observations include larger magnitude microseismicity occurs in high PR, high YM rocks; high event counts are found in low PR rocks, low b-value is consistent with the occurrence of larger magnitude events and low event counts, and YM and PR act as bounding conditions, creating “sweet spots” for high and low Mw, event count, and stress. In our crossplot space, there is a meaningful link between microseismicity and the elastic properties of the host rock. In light of this dependence of stimulation potential on elastic properties, the calculation of microseismic pseudologs at stimulation sites and application of our crossplot framework for microseismic-geomechanical analysis in unconventional shale will inform operators in planning and forecasting stimulation and production, respectively. (shrink)

The extensive development of unconventional reservoirs using horizontal drilling and multistage hydraulic fracturing has generated large volumes of reservoir characterization and production data. The analysis of this abundant data using statistical methods and advanced machine-learning techniques can provide data-driven insights into well performance. Most predictive modeling studies have focused on the impact that different well completion and stimulation strategies have on well production but have not fully exploited the available in situ rock property data to determine its role in reservoir (...) productivity. We have used machine-learning techniques to rank rock mechanical properties, microseismic attributes, and stimulation parameters in the order of their significance for predicting natural gas production from an unconventional reservoir. The data for this study came from a hydraulically fractured well in the Marcellus Shale in Monongalia County, West Virginia. The data classes included measurements aggregated by well completion stage that included gas production, well-log-derived measurements including bulk density, elastic moduli, shear impedance, compressional impedance, brittleness, and gamma measurements, microseismic attributes, long-period long-duration event counts, fracture counts, and stimulation parameters that included the fluid injection volume and average pumping pressure. To identify observable proxies for the drivers of gas production, we evaluated five commonly used ML approaches including multivariate adaptive regression spline, Gaussian mixture model, random forest, gradient boosting, and neural network. We selected five variables including LPLD event count, seismogenic b-value, hydraulic diffusivity, cumulative moment, and fluid volume as the features most likely to impact gas productivity at the stage level in the study area. The data-driven selection of these parameters for their importance in determining gas production can help reservoir engineers design more effective hydraulic-fracture treatments in the Marcellus Shale and other similar unconventional reservoirs. Plain language summary: We use machine-learning methods and data-driven selection of reservoir parameters to rank and better understand their importance in determining gas production, which can help reservoir engineers design more effective hydraulic-fracture treatments in the Marcellus Shale and other similar unconventional reservoirs. (shrink)

Microseismic monitoring by downhole geophones, surface seismic, fiber-optic distributed acoustic sensing, and distributed temperature sensing observations were made during the hydraulic fracture stimulation of the MIP-3H well in the Marcellus Shale in northern West Virginia. DAS and DTS data measure the fiber strain and temperature, respectively, along a fiber-optic cable cemented behind the casing of the well. The presence of long-period long-duration events is evaluated in the borehole geophones, DAS data, and surface seismic data of one of the MIP-3H stimulated (...) stages. LPLD events are generally overlooked during the conventional processing of microseismic data, but they represent significant nonbrittle deformation produced during hydraulic fracture stimulation. In a single stage that was examined, 160 preexisting fractures and two faults of suboptimal orientation are noted in the image logs. We identified two low-frequency events of large temporal duration by comparing the surface seismic data, borehole geophone data, and DAS amplitude spectra of one of the MIP-3H stages. Spectrograms of DAS traces in time and depth reveal that the first low-frequency event might be an injection noise that has footprints on all DAS channels above the stimulated stage. However, the surface seismic array indicates an LPLD event concurrent with the first low-frequency event on DAS. The second LPLD event on DAS data and surface seismic data is related to a local deformation and does not have footprints on all DAS channels. The interpreted events have duration less than 100 s with frequencies concentrated below 10 Hz, and are accompanied by microseismic events. (shrink)

[Richard Glauser] Shaftesbury's theory of aesthetic experience is based on his conception of a natural disposition to apprehend beauty, a real 'form' of things. I examine the implications of the disposition's naturalness. I argue that the disposition is not an extra faculty or a sixth sense, and attempt to situate Shaftesbury's position on this issue between those of Locke and Hutcheson. I argue that the natural disposition is to be perfected in many different ways in order to be exercised (...) in the perception of the different degrees of beauty within Shaftesbury's hierarchy. This leads to the conclusion that the exercise of the disposition depends, from case to case, on many different cognitive and affective conditions, that are realised by the collaborative functionings of our ordinary faculties. Essential to Shaftesbury's conception of aesthetic experience is a disinterested, contemplative love, that causes (or contains) what we may call a 'disinterested pleasure', but also an interested pleasure. I argue that, within any given aesthetic experience, the role of the disinterested pleasure is secondary to that of the disinterested love. However, an important function of the disinterested pleasure is that, in combination with the interested pleasure, it leads one to aspire to pass from the aesthetic experience of lower degrees of beauty to the experience of higher ones in the hierarchy. /// [Anthony Savile] (1) If Shaftesbury is to be seen as the doyen of modern aesthetics, his most valuable legacy to us may not so much be his viewing aesthetic response as a sui generis disinterested delight as his insistence on its turning 'wholly on [experience of] what is exterior and foreign to ourselves'. Not that we cannot experience ourselves, or what is our own, as a source of such admiration. Rather our responses, favourable or no, are improperly grounded in any essentially reflexive, or first-personal, ways of taking what engages us. The suggestion is tested against the case of Narcissus. (2) Glauser interestingly emphasizes Shaftesbury's neo-Platonic conception of a hierarchy of aesthetic experience that culminates in the joyful contemplation of God. That hierarchy must be something that is less unitary and systematic than Shaftesbury himself had supposed, even when his emphasis on the tie between aesthetic pleasure and contemplative experience is allowed to extend beyond perception and to encompass episodes of thought itself. (shrink)

Leading philosophers and social thinkers, including Richard Rorty, Jacques Derrida, and Jurgen Habermas, pay tribute to the influential American philosopher Richard J. Bernstein.

Demonstrating Richard Rorty’s breadth of scholarship and his influence on diverse issues across the social sciences and humanities, this comprehensive bibliography contains 1,165 citations. A unique reference work on neo-pragmatism, this bibliography is essential for anyone researching Rorty’s work and its impact on philosophy, literature, the arts, religion, the social sciences, politics, and education.

In The Varieties of Reference, Gareth Evans argues that the content of perceptual experience is nonconceptual, in a sense I shall explain momentarily. More recently, in his book Mind and World, John McDowell has argued that the reasons Evans gives for this claim are not compelling and, moreover, that Evans’s view is a version of “the Myth of the Given”: More precisely, Evans’s view is alleged to suffer from the same sorts of problems that plague sense-datum theories of perception. In (...) particular, McDowell argues that perceptual experience must be within “the space of reasons,” that perception must be able to give us reasons for, that is, to justify, our beliefs about the world: And, according to him, no state that does not have conceptual content can be a reason for a belief. Now, there are many ways in which Evans’s basic idea, that perceptual content is nonconceptual, might be developed; some of these, I shall argue, would be vulnerable to the objections McDowell brings against him. But I shall also argue that there is a way of developing it that is not vulnerable to these objections. (shrink)

Contemporary conversations about religion and culture are framed by two reductive definitions of secularity. In one, multiple faiths and nonfaiths coexist free from a dominant belief in God. In the other, we deny the sacred altogether and exclude religion from rational thought and behavior. But is there a third way for those who wish to rediscover the sacred in a skeptical society? What kind of faith, if any, can be proclaimed after the ravages of the Holocaust and the many religion-based (...) terrors since? Richard Kearney explores these questions with a host of philosophers known for their inclusive, forward-thinking work on the intersection of secularism, politics, and religion. An interreligious dialogue that refuses to paper over religious difference, these conversations locate the sacred within secular society and affirm a positive role for religion in human reflection and action. Drawing on his own philosophical formulations, literary analysis, and personal interreligious experiences, Kearney develops through these engagements a basic gesture of hospitality for approaching the question of God. His work facilitates a fresh encounter with our best-known voices in continental philosophy and their views on issues of importance to all spiritually minded individuals and skeptics: how to reconcile God's goodness with human evil, how to believe in both God and natural science, how to talk about God without indulging in fundamentalist rhetoric, and how to balance God's sovereignty with God's love. (shrink)

Together, the writings in this book show how McKeon reinvented the ancient arts of rhetoric, grammar, logic, and dialectic for the new circumstances of a global culture.

Richard Kilvington was an obscure fourteenth-century philosopher whose Sophismata deal with a series of logic-linguistic conundrums of a sort which featured extensively in philosophical discussions of this period. This is the first ever translation or edition of his work. As well as an introduction to Kilvington's work, the editors provide a detailed commentary. This edition will prove of considerable interest to historians of medieval philosophy who will realise from the evidence presented here that Kilvington deserves to be studied just (...) as seriously as Duns Scotus or William of Ockham. (shrink)

This first volume of an ambitious three-volume work covers philosophic theory through McKeon's writings on first philosophy (metaphysics) and the methods and principles of the sciences.

Rudolf Carnap and W. V. Quine, two of the twentieth century's most important philosophers, corresponded at length—and over a long period of time—on matters personal, professional, and philosophical. Their friendship encompassed issues and disagreements that go to the heart of contemporary philosophic discussions. Carnap was a founder and leader of the logical positivist school. The younger Quine began as his staunch admirer but diverged from him increasingly over questions in the analysis of meaning and the justification of belief. That they (...) remained close, relishing their differences through years of correspondence, shows their stature both as thinkers and as friends. The letters are presented here, in full, for the first time. The substantial introduction by Richard Creath offers a lively overview of Carnap's and Quine's careers and backgrounds, allowing the nonspecialist to see their writings in historical and intellectual perspective. Creath also provides a judicious analysis of the philosophical divide between them, showing how deep the issues cut into the discipline, and how to a large extent they remain unresolved. (shrink)

The training and experience of such academic philosophers as Richard Rorty and Hilary Putnam do not equip them with the economic and other social‐scientific tools necessary to make useful contributions to political discussion. In the case of Rorty, this has resulted in his being unable to make effective ripostes to left‐wing critics of his defense of “bourgeois liberalism,” his uncritical endorsement of simplistic arguments for social reform, and his embrace of false prophecies of doom, such as those found in (...) Orwell's novel Nineteen Eighty‐Four. Moreover, his disdain for “theory” has blinded him to the utility of mid‐level theories, such as those of economics, in dealing with concrete social problems. (shrink)

John Donne's song was hardly written in the tradition of political philosophy, but it has a good deal to say about the theme of luck, both good and bad, which I want to address. There is no doubt but that bad luck has bad consequences for the persons who suffer from it. If there were a costless way in which the consequences of bad luck could be spread across everyone in society at large, without increasing the risk of its occurrence, (...) then most of us would pronounce ourselves better off for the change. In this sense it can be said, for example, that there is a utilitarian grounding for a moral obligation to care and provide for those persons who suffer the fortunes of bad luck. For the sake of argument I do not wish to contest this particular starting point, although there are many who would. Instead, I want to ask the question of whether this moral obligation should be converted into a legal obligation, backed by public force. The dominant answer to that question today is yes. Even those who think that markets should determine decisions on production find that the state has a proper role to reduce the adverse consequences of bad luck. My cast of mind is more skeptical. In life, or, in this instance, politics, “come bad chance, and we do join to it our strength.” In general the effort to use coercion to counter the adverse effects of luck tends only to make matters worse. (shrink)

Precision medicine research is rapidly taking a lead role in the pursuit of new ways to improve health and prevent disease, but also presents new challenges for protecting human subjects. The extent to which the current “web” of legal protections, including technical data security measures, as well as measures to restrict access or prevent misuse of research data, will protect participants in this context remains largely unknown. Understanding the strength, usefulness, and limitations of this constellation of laws, regulations, and procedures (...) is critical to ensuring not only that participants are protected, but also that their participation decisions are accurately informed. To address these gaps, we conducted in-depth interviews with a diverse group of 60 thought-leaders to explore their perspectives on the protections associated with precision medicine research. (shrink)

In this review of Richard Swinburne's Is There a God? , Richard Dawkins admires Swinburne's clarity but is unconvinced by his arguments. Dawkins questions, in particular, Swinburne's suggestion that the hypothesis that God exists and sustains his creation is simpler than the hypothesis that there is no God.

Richard Wollheim is one of the dominant figures in the philosophy of art, whose work has shown not only how paintings create their effects but why they remain important to us. His influential writings have focused on two core, interrelated questions: How do paintings depict? and how do they express feelings? In this collection of new essays a distinguished group of thinkers in the fields of art history and philosophical aesthetics offers a critical assessment of Wollheim's theory of art. (...) Among the themes under discussion are Wollheim's explanation of pictorial representation in terms of seeing-in, his views of artistic expression as a type of complex projection, and his notion of the internal spectator. In the final essay Wollheim himself responds to the contributors. This book will be eagerly sought out by all serious students of the theory of art, whether in departments of philosophy or art history. (shrink)

In a Sentences Commentary written about 1250 the Franciscan Richard Rufus subjects Anselm’s argument for God’s existence in his Proslogion to the most trenchant criticism since Gaunilon wrote his response on behalf of the “fool.” Anselm’s argument is subtle but sophistical, claims Rufus, because he fails to distinguish between signification and supposition. Rufus therefore offers five reformulations of the Anselmian argument, which we restate in modern formal logic and four of which we claim are valid, the fifth turning on (...) a possible scribal error. Rufus’s final conclusion is that the formulation in Proslogion, chapter 3, is convincing, but not that of chapter 2. (shrink)

Richard M. Gale Richard Gale was an American philosopher known for defending the A-theory of time against the B-theory. The A-theory implies, for example, that tensed predicates are not reducible to tenseless predicates. Gale also argued against the claim that negative truths are reducible to positive ones. He created a new modal version of … Continue reading Gale, Richard M. →.

This is an excellent article, probably the best there is in defence of prohibiting the sale of organs, and it deserves a much fuller discussion of detail than there is space for here.1 My concerns, however, are with generalities rather than detail. Although some such argument might justify prohibition of organ selling in particular places and at particular times, it is difficult to see how it could support the kind of general, universal policy currently accepted by most advocates of prohibition.Whenever (...) the subject of organ selling is discussed, it is useful to keep in mind the natural history of the debate. Prohibition was instituted by most governments and professional bodies just about as quickly as possible after it was discovered that payment for kidneys was going on, and was a direct response to feelings of moral outrage. It all happened without time for debate. It was only later, as challenges appeared, that justifications began to be produced; and when they did they followed a pattern long familiar to philosophers, and more recently recognised by moral psychologists, of determined efforts to find a justification for the initial intuition that organ selling must be wrong. New arguments kept appearing in the cause as earlier attempts were shown to fail, and many were so weak that they could not have seemed plausible unless their advocates had already been committed to their conclusion. This does not mean, of course, that a good justification could never be produced. It does, however, suggest a widespread feeling that organ selling must be intrinsically …. (shrink)

Richard Swinburne is one of the most influential contemporaryproponents of the analytical philosophy of religion.

To assist in resolving ethical questions surrounding unregulated mHealth research, we conducted in-depth qualitative interviews with experts from four key stakeholder groups: patient/research advocates, researchers, regulatory professionals, and mobile app/device developers. They discussed challenges and potential solutions in the context of two hypothetical scenarios involving unregulated mHealth research, including notifications/permissions for research use of mHealth data, data access procedures, new primary data collection, offering individual research results, and data sharing and dissemination.

String theory has played a highly influential role in theoretical physics for nearly three decades and has substantially altered our view of the elementary building principles of the Universe. However, the theory remains empirically unconfirmed, and is expected to remain so for the foreseeable future. So why do string theorists have such a strong belief in their theory? This book explores this question, offering a novel insight into the nature of theory assessment itself. Dawid approaches the topic from a unique (...) position, having extensive experience in both philosophy and high-energy physics. He argues that string theory is just the most conspicuous example of a number of theories in high-energy physics where non-empirical theory assessment has an important part to play. Aimed at physicists and philosophers of science, the book does not use mathematical formalism and explains most technical terms. (shrink)

Interpretations of Aristotle's account of the relation between body and soul have been widely divergent. At one extreme, Thomas Slakey has said that in the De Anima ‘Aristotle tries to explain perception simply as an event in the sense-organs’. Wallace Matson has generalized the point. Of the Greeks in general he says, ‘Mind–body identity was taken for granted.… Indeed, in the whole classical corpus there exists no denial of the view that sensing is a bodily process throughout’. At the opposite (...) extreme, Friedrich Solmsen has said of Aristotle's theory, ‘it is doubtful whether the movement or the actualization occurring when the eye sees or the ear hears has any physical or physiological aspect.’ Similarly, Jonathan Barnes has described Aristotle as leaning hesitantly towards the view that desire and thought are wholly non-physical. But on the emotions and sense-perception, Barnes takes an intermediate position. Aristotle treats these, he says, as including physical and non-physical components. Other writers too have sought a position somewhere in the middle. Thus G. R. T. Ross concedes that we find in Aristotle ‘what looks like the crudest materialism’. It appears that objects produce changes in an organism, ‘and the reception of these changes in the sense organ is perception’. But, he maintains, this gives us only half the picture. The complete theory ‘may in a way be designated as a doctrine of psychophysical parallelism’. W. D. Ross also seeks a middle position. He thinks that Aristotle sometimes brings out ‘the distinctively mental, non-corporeal nature of the act [of sensation].… But Aristotle cannot be said to hold successfully to the notion of sensation as a purely mental activity having nothing in common with anything physical. He is still under the influence of earlier materialism’. (shrink)

Dr. Davidson is a William James and Vilas Research Professor of Psychology and Psychiatry at the University of Wisconsin-Madison. He received his Ph.D. from Harvard University in Psychology and has been at Wisconsin since 1984.

Did Newton "unweave the rainbow" by reducing it to its prismatic colors, as Keats contended? Did he, in other words, diminish beauty? Far from it, says Dawkins--Newton's unweaving is the key too much of modern astronomy and to the breathtaking poetry of modern cosmology. Mysteries don't lose their poetry because they are solved: the solution often is more beautiful than the puzzle, uncovering deeper mystery. (The Keats who spoke of "unweaving the rainbow" was a very young man, Dawkins reminds us.) (...) With the wit, insight, and spellbinding prose that have made his books worldwide bestsellers, Dawkins addresses the most important and compelling topics in modern science, from astronomy and genetics to language and virtual reality, and combines them in a landmark statement of the human appetite for wonder. This is the book that Richard Dawkins was meant to write: a brilliant assessment of what science is (and what it isn't), a tribute to science "not because it is useful (though it is), but but because it is uplifting, in the same way as the best poetry is uplifting.". (shrink)