Introduction: Although deep brain stimulation often improves levodopa-responsive gait symptoms, robust therapies for gait dysfunction from Parkinson's disease remain a major unmet need. Walking speed could represent a simple, integrated tool to assess DBS efficacy but is often not examined systematically or quantitatively during DBS programming. Here we investigate the reliability and functional significance of changes in gait by directional DBS in the subthalamic nucleus.Methods: Nineteen patients underwent unilateral subthalamic nucleus DBS surgery with an eight-contact directional lead in the most (...) severely affected hemisphere. They arrived off dopaminergic medications >12 h preoperatively and for device activation 1 month after surgery. We measured a comfortable walking speed using an instrumented walkway with DBS off and at each of 10 stimulation configurations at the midpoint of the therapeutic window. Repeated measures of ANOVA contrasted preoperative vs. maximum and minimum walking speeds across DBS configurations during device activation. Intraclass correlation coefficients examined walking speed reliability across the four trials within each DBS configuration. We also investigated whether changes in walking speed related to modification of step length vs. cadence with a one-sample t-test.Results: Mean comfortable walking speed improved significantly with DBS on vs. both DBS off and minimum speeds with DBS on. Pairwise comparisons showed no significant difference between DBS off and minimum comfortable walking speed with DBS on. Intraclass correlations were ≥0.949 within each condition. Changes in comfortable walk speed were conferred primarily by changes in step length.Conclusion: Acute assessment of walking speed is a reliable, clinically meaningful measure of gait function during DBS activation. Directional and circular unilateral subthalamic DBS in appropriate configurations elicit acute and clinically significant improvements in gait dysfunction related to PD. Next-generation directional DBS technologies have significant potential to enhance gait by individually tailoring stimulation parameters to optimize efficacy. (shrink)

Directional deep brain stimulation contacts provide greater spatial flexibility for therapy than traditional ring-shaped electrodes, but little is known about longitudinal changes of impedance and orientation. We measured monopolar and bipolar impedance of DBS contacts in 31 patients who underwent unilateral subthalamic nucleus deep brain stimulation as part of a randomized study. At different follow-up visits, patients were assigned new stimulation configurations and impedance was measured. Additionally, we measured the orientation of the directional lead during surgery, immediately after surgery, and (...) 1 year later. Here we contrast impedances in directional versus ring contacts with respect to local anatomy, active stimulation contact, and over time. Directional contacts display larger impedances than ring contacts. Impedances generally increase slightly over the first year of therapy, save for a transient decrease immediately post-surgery under general anesthesia during pulse generator placement. Local impedances decrease at active stimulation sites, and contacts in closest proximity to internal capsule display higher impedances than other anatomic sites. DBS leads rotate slightly in the immediate postoperative period but otherwise remain stable over the following year. These data provide useful information for setting clinical stimulation parameters over time. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:DHARMA AND DESTRUCTION: BUDDHIST INSTITUTIONS AND VIOLENCE Christopher Ives Stonehill College Photographs ofgentle monks in saffron, the cottageindustry ofbooks on mindfulness, and the Dalai Lama's response to the Chinese invasion of Tibet have all helped portray Buddhism as the "religion of nonviolence." This representation ofBuddhism finds support in Buddhist texts, doctrines, and ritual practices, which often advocate ahimsa, nonharming or non-violence. The historical record, however, belies the portrayal (...) of Buddhism as a "religion of nonviolence." By reinterpreting early doctrines of ahimsa, Buddhist thinkers have legitimated violence in particular situations, practitioners have committed acts of violence, and Buddhist institutions have lent support to other institutions—social, political, and governmental —engaged in violence. In this paper I will examine Buddhist perpetration andjustifications ofviolence,1 with particularfocus on Japan, arguing that, historically, Buddhists' desire for institutional security has taken precedence over total rejection of violence. 1 I have restricted my discussion to the killing of other human beings. I do not consider suicide andthe killing ofnon-human animals. For a discussion ofBuddhism, (self-)sacrifice, and suicide in relation to Girard's theory, see Charles D. Orzech, '"Provoked Suicide' and the Victim's Behavior." 152Christopher Ives Non-violence The doctrine of ahimsa figures prominently in early and Theravadan Buddhism. The first ofthe five moral precepts (panca silani) in Buddhism is ahimsa, and in the Dhammapada the historical Buddha purportedly states, All are afraid of the rod. Of death all are afraid. Having made oneself the example, One should neither slay nor cause to slay. (Ross 202) The Buddhaalso sketches the consequences ofhurting orharming (himsa): Who with a rod does hurt Beings who desire ease [of nibbana], While himself looking for ease— He, having departed, ease does not get. Theravadan monastic codes and practices, such as the uposatha biweekly confession of moral transgressions and recitation of the 227 rules in the Patimokkha (Skt. Pratimoksa), are closely tiedto ahimsa. One ofthe Patimokkha's four "offenses of defeat" (parajika dharmas), for which the punishment is immediate expulsion of the monk or nun from the order, is killing another human being (Prebish 11). Mahayana texts continue this exhortation against violence. For example, in the Dasabhimika-sutra we read that a Buddhist "must not hate any being and cannot kill a living creature even in thought."2 Early Buddhist texts include depictions ofthe ideal Buddhist king, the cakravartin-raja or "monarch who turns the wheel [of the Dharma],"3 as an exemplar of nonviolence. Contemporary Buddhist activist Sulak Sivaraksa expresses it, this king is a "an ideal ruler, a world-conquering monarch, who subdued the earth through righteousness rather than war" (Sulak 129), and whose ten main duties include striving for peace and ruling with nonviolent benevolence (129). For well over 2000 years 2 Cited in Har Dayal, The Bodhisattva Doctrine, p. 199; quoted by Kraft, 5. In much ofthe first section of this paper I am indebted to Ken Kraft's introduction to his volume. 3 The metaphor ofturning the wheel refers to the historical Buddha's teaching ofthe Dharma and the later propagation of it by others. Dharma and Deconstruction153 Buddhists have lifted up Indian king Ashoka (c. 272-236) as an instantiation of this ideal. The early Buddhist doctrine of ahimsa should not, however, be construed as compassionate altruism. Luis Gómez and other scholars have delineated how ahimsa at first did not express some sort of underlying altruistic concern for the well-being of others. Vegetarianism and other ways of avoiding himsa, harming or violence, derived from ancient Indian ritual taboos againstblood and otherbodily liquids (Gómez 36). Buddhists ethicized and psychologized earlier notions of physical pollution, and advocated abstention fromviolenceprimarily as ameans ofself-cultivation, as a way to keep the mind pure, like an unstained cloth (36). (Scholars have even argued that the positive expression oíahimsa, the practice ofdirecting metta (loving-kindness) to others, originally had as much or more to do with the spiritual benefits accrued by the person directing the metta as it did with the well-being of the person receiving it. Only later was ahimsa furtherreinterpreted as positive regard forothers, as seen in the bodhisattva ideal of Mahayana Buddhism. Violence in Buddhist History At numerous times over... (shrink)

In the Gorgias, Socrates claims to practice the true art of politics, but the peculiar politics he practices involves cultivating in each individual he encounters an erotic desire to live a life animated by the ideals of justice, beauty and the good. Socratic and Platonic Political Philosophy demonstrates that what Socrates sought to do with those he encountered, Platonic writing attempts to do with readers. Christopher P. Long's attentive readings of the Protagoras, Gorgias, Phaedo, Apology, and Phaedrus invite us (...) to cultivate the habits of thinking and responding that mark the practices of both Socratic and Platonic politics. Platonic political writing is here experienced in a new way as the contours of a politics of reading emerges in which the community of readers is called to consider how a commitment to speaking the truth and acting toward justice can enrich our lives together. (shrink)

Tracing a path opened by an enigmatic reference in Reiner Schürmann’s dissertation to the symbol of water in James Baldwin’s, this essay follows the thinking of Schürmann and Baldwin to the tragic denial that perverts the ideals of the United States from the moment of its founding. Drawing on Schürmann’s imperative hermeneutics, we attend to Baldwin’s essays from the 1960s as they call white citizens of the United States to take on the “hideously difficult” task of achieving our identity as (...) a nation by facing our history and transforming ourselves as human beings. The symbols of water, fire, and love point us to new ways of existing rooted in practices of love—sensual releasement, ethical candor, and ethical imagination—that just might enable us to create a more perfect union. (shrink)

Derk Pereboom has posed an empirical objection to agent-causal libertarianism: The best empirically confirmed scientific theories feature physical laws predicting no long-run deviations from fixed conditional frequencies that govern events. If agent-causal libertarianism were true, however, then it would be virtually certain, absent ‘wild coincidences’, that such long-run deviations would occur. So, current empirical evidence makes agent-causal libertarianism unlikely. This paper formulates Pereboom’s ‘Problem of Wild Coincidences’ as a five-step argument and considers two recent responses. Then, it offers a different (...) response: The Problem of Wild Coincidences does not show that current empirical evidence makes agent-causal libertarianism unlikely, even if all events are governed by physical laws featuring fixed long-run conditional frequencies and even if agents can ‘overrule’ normal physical laws. (shrink)

In Plato’s Protagoras Alcibiades plays the role of Hermes, the ‘ambassador god,’ who helps lead Socrates’ conversation with Protagoras through a crisis of dialogue that threatens to destroy the community of education established by the dialogue itself. By tracing the moments when Alcibiades intervenes in the conversation, we are led to an understanding of Socratic politics as always concerned with the course of the life of an individual and the proper time in which it might be turned toward the question (...) of justice and the good. (shrink)

Ontology has been traditionally guided by sophia, a form of knowledge directed toward that which is eternal, permanent, necessary. This tradition finds an important early expression in the philosophical ontology of Aristotle. Yet in the Nicomachean Ethics, Aristotle's intense concern to do justice to the world of finite contingency leads him to develop a mode of knowledge, phronsis, that implicitly challenges the hegemony of sophia and the economy of values on which it depends. Following in the tradition of the early (...) Heidegger's recognition of the ontological significance of Aristotle's Ethics and of Gadamer's appropriation of phronsis for hermeneutics, this article argues that an ontology guided by phronsis is preferable to one governed by sophia. Specifically, it suggests that by taking sophia as its paradigm, traditional philosophical ontology has historically been determined by a kind of knowledge that is incapable of critically considering the concrete historico-ethico-political conditions of its own deployment. This critique of sophia is accomplished by uncovering the economy of values that led Aristotle to privilege sophia over phronsis. It is intended to open up the possibility of developing an ontology of finite contingency based on phronsis. Such an ontology, because it is guided by and must remain responsible to the concrete individual with which it is engaged, would be ethical at its very core. (shrink)

(2008). The Framework of Essences in Spinoza's Ethics. British Journal for the History of Philosophy: Vol. 16, No. 3, pp. 489-509. doi: 10.1080/09608780802200489.

This book articulates the nature of truth as a cooperative activity between human beings and the natural world that is rooted in our endeavors to do justice to the nature of things.

Despite the emphasis on moral intuition in the research literature, little attention has been given to the ways in which moral intuition can be educated within management settings (Dane & Pratt 2007). In this paper, I discuss an experiential learning approach that links Robin Hogarth’s (2001, 2008) work on the learning of intuition with Mary Gentile’s (2010) educational program on values-based leadership, Giving Voice To Values (GVV). Building on Hogarth’s proposal that intuitions are primarily acquired and thus shaped by our (...) experiences, GVV offers a pedagogical framework for reflective, experiential learning. Specific attention is given to the themes of learning environments, how these structures shape intuitions, and how students can identify these structures using the GVV emphasis on examination of past experiences. (shrink)

One aspiration of an analytic jurisprudential theory is to provide an account of how legal obligations arise, including the legal obligation of judges to apply only legally valid norms when adjudicating cases. Also, any fully adequate theory should enable a solution to a ‘chicken-egg’ puzzle regarding legal authority: legal authority can exist only in virtue of rules that authorize it, but such rules require a legal authority as their source. Which came first? This article argues that it is difficult to (...) see how a particular type of positivist theory (featuring a fundamental norm that plays certain roles) can solve the puzzle and also account for the aforementioned adjudicative duty. The challenge can be framed in terms of the need to be able to derive a legal ‘ought’ (applying to courts) from only ‘is’-statements expressing social facts, where the requisite derivation cannot rely on what John Searle has called ‘institutional facts’. (shrink)

This essay suggests the possibility of conceiving the transcendental synthesis of imagination in Kant's Critique of Pure Reason as the understanding at work on sensibility by developing an active conception of identity according to which the distinction between the imagination and the understanding is merely nominal. Aristotle's philosophy is shown both to provide such a conception of identity and to be tacitly at work in Kant's thinking. Finally, the essay traces this position into the discussion of aesthetic judgment in the (...) Critique of Judgment. (shrink)

A $\Pi^0_1$ class can be defined as the set of infinite paths through a computable tree. For classes $P$ and $Q$, say that $P$ is Medvedev reducible to $Q$, $P \leq_M Q$, if there is a computably continuous functional mapping $Q$ into $P$. Let $\mathcal{L}_M$ be the lattice of degrees formed by $\Pi^0_1$ subclasses of $2^\omega$ under the Medvedev reducibility. In "Non-branching degrees in the Medvedev lattice of $\Pi \sp{0}\sb{1} classes," I provided a characterization of nonbranching/branching and a classification of (...) the nonbranching degrees. In this paper, I present a similar classification of the branching degrees. In particular, $P$ is separable if there is a clopen set $C$ such that $P \cap C \neq \emptyset \neq P \cap C^c$ and $P \cap C \perp_M P \cap C^c$. By the results in the first paper, separability is an invariant of a Medvedev degree and a degree is branching if and only if it contains a separable member. Further define $P$ to be hyperseparable if, for all such $C$, $P \cap C \perp_M P \cap C^c$ and totally separable if, for all $X,Y \in P$, $X \perp_T Y$. I will show that totally separable implies hyperseparable implies separable and that the reverse implications do not hold, that is, that these are three distinct types of branching degrees. Along the way I will show some related results and present a combinatorial framework for constructing $\Pi^0_1$ classes with priority arguments. (shrink)

The mad scientist stories of fiction and film are exercises in antirationalism, particularly its Gothic horror variant. As such, they convey the argument that rationalist secular science is dangerous, and their principal device for doing so is to invest the evil of science in the personality of the scientist. To understand this cultural critique of science, it is necessary to understand how the symbols of the scientist's personality are manipulated. This article argues that mad scientists become increasingly amoral as nineteenth-century (...) texts are adapted to twentieth-century films. The consequence is that this cultural critique is becoming even more severe, due to external reasons independent of the glories or the crimes of real scientists. (shrink)

Despite the emphasis on moral intuition in the research literature, little attention has been given to the ways in which moral intuition can be educated within management settings. In this paper, I discuss an experiential learning approach that links Robin Hogarth’s work on the learning of intuition with Mary Gentile’s educational program on values-based leadership, Giving Voice To Values. Building on Hogarth’s proposal that intuitions are primarily acquired and thus shaped by our experiences, GVV offers a pedagogical framework for reflective, (...) experiential learning. Specific attention is given to the themes of learning environments, how these structures shape intuitions, and how students can identify these structures using the GVV emphasis on examination of past experiences. (shrink)

Scholars often assume that Aristotle uses the terms morphē and eidos interchangeably. Translators of Aristotle's works rarely feel the need to carry the distinctionbetween these two Greek terms over into English. This article challenges the orthodox view that morphē and eidos are synonymous. Careful analysis of texts fromthe Categories, Physics, and Metaphysics in which these terms appear in close proximity reveals a fundamental tension of Aristotle's thinking concerning the being of natural beings. Morphē designates the form as inseparable from the (...) matter in which it inheres, while eidos, because it is more easily separated from matter, is the vocabulary used to determine form as the ontological principle of the composite individual. The tension between morphē and eidos—between form as irreducibly immanent and yet somehow separate—is then shown to animate Aristotle's phenomenological approach to the being of natural beings. This approach is most clearly enacted in Aristotle's biology, a consideration of which concludes the essay. (shrink)

This essay articulates the differences and suggests the similarities between the practices of Socratic political speaking and those of Platonic political writing. The essay delineates Socratic speaking and Platonic writing as both erotically oriented toward ideals capable of transforming the lives of individuals and their relationships with one another. Besides it shows that in the Protagoras the practices of Socratic political speaking are concerned less with Protagoras than with the individual young man, Hippocrates. In the Phaedo, this ideal of a (...) Socrates is amplified in such a way that Platonic writing itself emerges as capable of doing with readers what Socratic speaking did with those he encountered. Socrates is the Platonic political ideal. The result is a picture of the transformative political power of Socratic speaking and Platonic writing both. El ensayo articula diferencias y sugiere similitudes entre las prácticas del diálogo político de Sócrates y aquellas de la escritura política de Platón. Propone, además, que tanto el diálogo socrático como la escritura platónica se orientan eróticamente hacia ideales capaces de transformar las vidas de los individuos y sus relaciones. Demuestra que en el Protágoras las prácticas del diálogo socrático se ocupan menos de Protágoras que del joven Hipócrates. En el Fedón, este ideal de Sócrates se amplía de tal manera que la misma escritura platónica aparece como capaz de hacer con los lectores lo que el diálogo de Sócrates hacía con sus interlocutores. Sócrates es el ideal político platónico. El resultado es una visión del poder de transformación política tanto del diálogo socrático como de la escritura platónica. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 34.4 (2001) 292-307 [Access article in PDF] The Rhetoric of the Geometrical Method Spinoza's Double Strategy Christopher P. Long A double strategy may be apprehended in the first definitions, axioms and propositions of Spinoza's Ethics: the one is rhetorical, the other, systematic. Insofar as these opening passages constitute a geometrical argument that leads ultimately to the strict monism that lies at the heart of Spinoza's (...) philosophy, they function systematically as grounding principles. However, insofar as they are designed to uncover errors at the heart of the Cartesian system, they function rhetorically as a critique of Descartes's equivocal theory of substance. The geometrical mode of presentation lends an aura of necessity to the systematic strategy and tends to eclipse the rhetorical strategy that functions as a critique of Cartesian dualism. 1 To this extent, the systematic strategy itself functions rhetorically. On the other hand, to the extent that any seventeenth-century attempt to establish a monistic system would inevitably have had to involve a critique of Cartesian dualism, the rhetorical strategy itself functions systematically. Thus, although two distinct strategies are simultaneously discernible in the opening passages of the Ethics, the two work together, each arguing on a different front, to establish Spinoza's monism. By focusing on the rhetorical side of this double strategy, the underlying nature of Spinoza's critique of Descartes can be clarified and certain gaps in the systematic, geometrical argument for monism can be explained. Descartes's theory of substance The rhetorical strategy Spinoza employs at the outset of the Ethics involves a brilliant use of equivocation and ambiguity designed to draw a reader dedicated to Cartesian dualism into the heart of an argument designed to [End Page 292] undermine this dualism itself. The impetus behind this rhetorical critique is surely Spinoza's dissatisfaction with Descartes's theory of substance. 1. Descartes's equivocation Descartes's theory rests upon a fundamental equivocation: on the one hand, the term "substance" is meant strictly to designate that which is absolutely self-sufficient, namely, God; on the other hand, Descartes allows for a weaker understanding of substance, which pertains to those things (specifically res cogitans and res extensa) that require only the concurrence of God in order to exist (Principles I, 51-52; AT VIIIA24-25). 2 Thus, for Descartes, although God is, strictly speaking, the only substance, there remains a sense in which both res cogitans and res extensa may be understood as substances as well.Ultimately, this equivocal understanding of substance may be traced to a tension internal to Descartes between the Aristotelian notion of substance as underlying subject and the seventeenth-century mutation of that notion, which came to be defined in terms of causal self-sufficiency. 3 Jonathan Bennett traces the source of this mutation back to the view held by Aristotle that the existence of some property depends upon its being instantiated--that is, there can be no courage unless there exists someone courageous. He continues his interesting argument thus: This suggests that there is a relation of dependence running from properties to the things that have them and not conversely. The dependence would be logical: the thesis must be that "existent but uninstantiated property" is conceptually defective, not merely contrary to physics. Thus, one mark of a genuine thing, or substance, is its not being logically dependent for its existence on anything else. (Bennett 1984, 56) The development of this line of thinking leads to the conception of substance we find both in Descartes's Principles and in Spinoza's Ethics, namely, that a substance must not causally depend on anything outside of itself for its existence. 4 However, with Descartes, what emerges out of this tradition is a hybrid understanding of substance in which the term "substance" is not reserved simply for that which is utterly self-sufficient (God), but extends to those things that depend only upon the concurrence of God for their existence (rescogitans and resextensa). This bifurcated understanding of substance seems to stem from the distinction at work in [End Page 293] Aristotle... (shrink)

As histories of nanotechnology are created, one question arises repeatedly: how influential was Richard Feynman’s 1959 talk, “There’s Plenty of Room at the Bottom”? It is often said by knowledgeable people that this talk was the origin of nanotech. It preceded events like the invention of the scanning tunneling microscope, but did it inspire scientists to do things they would not have done otherwise? Did Feynman’s paper directly influence important scientific developments in nanotechnology? Or is his paper being retroactively read (...) into the history of nanotechnology? To explore those questions, I trace the history of “Plenty of Room,” including its publication and republication, its record of citations in scientific literature, and the comments of eight luminaries of nanotechnology. This biography of a text and its life among other texts enables us to articulate Feynman’s paper with the history of nanotechnology in new ways as it explores how Feynman’s paper is read. (shrink)

A $\Pi _{1}^{0}$ class is the set of paths through a computable tree. Given classes P and Q, P is Medvedev reducible to Q, P ≤M Q, if there is a computably continuous functional mapping Q into P. We look at the lattice formed by $\Pi _{1}^{0}$ subclasses of 2ω under this reduction. It is known that the degree of a splitting class of c.e. sets is non-branching. We further characterize non-branching degrees, providing two additional properties which guarantee non-branching: inseparable (...) and hyperinseparable. Our main result is to show that non-branching iff inseparable if hyperinseparable if homogeneous and that all unstated implications do not hold. We also show that inseparable and not hyperinseparable degrees are downward dense. (shrink)

The original article has been corrected. Figures 1 and 2 have been replaced. During typesetting of the article, one of the five steps in section 4 was removed.

Abstract:Environmental ethics and policy have been largely developed around the concept of nature as a dynamic collection of living beings in direct interaction with humans. However, when we consider the Moon, Mars, and other worlds we encounter profoundly static and lifeless nature with essentially no history of human interaction. On what basis do we make decisions on the preservation or utilization of such lifeless landscapes? Here I suggest that static lifeless landscapes on other worlds have some parallels on Earth in (...) the upper elevations of the Antarctic Dry Valleys and the central depression of the Atacama Desert in Chile and Peru. In the soil of both locations life is absent or cannot grow and the timescales of landscape evolution vastly exceed human timescales. For all intents and purposes, these are static and lifeless landscapes. Today, human activities in Antarctica are carefully regulated with a view toward preservation while in the Atacama Desert resource mining has extensively altered the landscape. Thus, these two sites provide alternate possible futures for the Moon and Mars. Preservation of static lifeless landscapes could be based on two attributes. First, they provide a way to further define and understand the Earth and the limits of life—which is the current scientific motivation for biological and geological research activities there. Second, both on Earth and particularly on other worlds, lifeless landscapes may express states that are new to human experience akin to new forms of art or new branches of science. We don't understand these environments, their nature, or their relationship to us. In the case of Mars there may come to be a tension between preserving a lifeless landscape and introducing or enhancing life on that planet. (shrink)

Because an agent’s constitutive luck may seem to preclude free will, it may seem to preclude moral responsibility. An agent is basically morally responsible for performing actionAat timetonly if there is another possible world with the same past up totand the same laws of nature in which the agent does not performAatt. A compatibilist can solve the constitutive luck problem for moral responsibility without worrying about basic moral responsibility. According to compatibilism, if determinism is true, then agents can be morally (...) responsible for performing actions without being basically morally responsible for performing them. But a libertarian who thinks agents can be basically morally responsible for what they do must explain how basic moral responsibility is possible. ACT-endorsing libertarianism can both solve the constitutive luck problem for moral responsibility and explain how agents can be basically morally responsible for what they do. (shrink)

Using a subliminal priming lexical decision task, the present research investigated whether individuals who show negative implicit evaluations of an ex-partner immediately after a break-up show superior post-break-up emotional adjustment. As expected, individuals whose reaction times indicated negative implicit evaluations of their ex-partner showed reduced depressive affect immediately after the break-up. Individuals who did not initiate their break-up demonstrated less negative implicit evaluations of their ex-partners as well as more depressive affect. Finally, increased negative implicit evaluations of ex-partners over a (...) one-month period were associated with corresponding improvements in adjustment. The findings demonstrate a critical role for implicit evaluations in post-break-up adjustment. (shrink)

The discovery of a second genesis of life besides the one on Earth, this time on Mars, would have profound scientific and philosophical implications. Scientifically, it would provide a second example of biochemistry and of evolutionary history. Many important biological questions may be answerable through the comparison of biochemistry between the life forms on the two planets. Philosophically, the discovery of a second genesis of life in our solar system would suggest that the phenomenon of life is distributed throughout the (...) universe. We could finally be confident that we are not alone. To protect a second genesis as we search for it, the robotic and human exploration of Mars should be done in a way that is biologically reversible, i.e., we must be able to undo our contamination of Mars if we discover a second genesis of life there. It is important to note that human exploration can be done in a way that is biologically reversible. Further, the discovery of a second genesis of life on Mars poses new questions in ethics. One question is: what ethical consideration is due to an alien life form when that life is distinctly different from Earth life, and the members of that life are no more advanced than microorganisms? Will we choose to terraform Mars to enhance the richness and diversity of the indigenous life we find there? In considering our answers to these questions, we should note that for most of Earth’s history our ancestors were microscopic. (shrink)

As Sorcerer Supreme, Doctor Stephen Strange has had several occasions in which he had to deal with the concept of a personal God. Despite his lack of traditional faith, there are important instances in which Doctor Strange acknowledges the Creator God using expressions drawn from the Western monotheistic traditions. In his Metaphysics, the ancient Greek philosopher Aristotle presents the idea of God, or more specifically a god among the gods, who is responsible for the origin and operation of the whole (...) universe. A more helpful image of God can be found in the writing of Saint Thomas Aquinas, who formed a theological synthesis of Aristotelian philosophy and Christian revelation. According to Aquinas, the all‐good Creator of the universe is the author of the moral law. In the Chronicles of Narnia, author and English professor C. S. Lewis refers to the eternal law of God as the “deep magic” that comes from the “Emperor Beyond the Sea”. (shrink)

PDZ (also called DHR or GLGF) domains are found in diverse membraneassociated proteins including members of the MAGUK family of guanylate kinase homologues, several protein phosphatases and kinases, neuronal nitric oxide synthase, and several dystrophin‐associated proteins, collectively known as syntrophins. Many PDZ domain‐containing proteins appear to be localised to highly specialised submembranous sites, suggesting their participation in cellular junction formation, receptor or channel clustering, and intracellular signalling events. PDZ domains of several MAGUKs interact with the C‐terminal polypeptides of a subset (...) of NMDA receptor subunits and/or with Shaker‐type K+ channels. Other PDZ domains have been shown to bind similar ligands of other transmembrane receptors. Recently, the crystal structures of PDZ domains, with and without ligand, have been determined. These demonstrate the mode of ligand‐binding and the structural bases for sequence conservation among diverse PDZ domains. (shrink)