Sandia National Laboratories, located in Albuquerque, New Mexico, was originally a part of Los Alamos Laboratory. In 1949, AT&T agreed to manage Sandia, which they did for the next 44 years. During those Cold War years, Sandia was the prime weapons engineering laboratory for Los Alamos and Lawrence Livermore. As such, it bore prime responsibility for designing and adapting nuclear weapons for the military services' delivery systems, and ensuring the safety and reliability of the stockpile. The Labs' history has been (...) unevenly documented, hindered by the secret nature of its work and the desire of management to maintain a low public profile. There have been three history programs at Sandia: a restricted history published internally in 1963; another history program in the early 1980s that resulted in a history of the Labs' first decade; and the current history program dating from the mid-1990s, which has published a general history and several monographs. This article discusses the challenges and problems inherent in documenting the history of a national weapons laboratory during the last 50 years. (shrink)

We review the history of the road to a manifestly covariant perturbative calculus within quantum electrodynamics from the early semi-classical results of the mid-twenties to the complete formalism of Stueckelberg in 1934. We choose as our case study the calculation of the cross-section of the Compton effect. We analyse Stueckelberg's paper extensively. This is our first contribution to a study of his fundamental contributions to the theoretical physics of the twentieth century.

In his search for a unified field theory that could undercut quantum mechanics, Einstein considered five-dimensional classical Kaluza-Klein theory. He studied this theory most intensively during the years 1938-1943. One of his primary objectives was finding a non-singular particle solution. In the full theory this search got frustrated, and in the x 5 -independent theory Einstein, together with Pauli, argued it would be impossible to find these structures.

The Simplicity and Power (SP) theory (Wolff 2003a) provides support for Pothos's proposals by illustrating how the effect of “rules” and “similarity” may be achieved within an integrated model that makes no explicit provision for either concept. The theory is described here in outline with simple examples to show how rules and similarity can emerge as properties of the system in learning, reasoning, categorization, and the parsing of language.

The development of theories of global cortical dynamics, using linear wave theory, owes much to the pioneering work of Nunez. His work leads to clear predictions on relations of brain size, axonal conduction velocity, and the frequencies of the cerebral rhythms. These predictions do not appear to be fulfilled, but their falsification constrains the range of parameters applicable in further formulations.

The proclamation of the death of God came at a pivotal time in the history of humankind. It far transcended the concerns of the religious faithful and dented the entire fabric of human existence. Left to its own devices, humans intended their consciousness to replace God's. This proved to be a terrible mistake that collapsed the entire modern project. One of the worldviews that emerged in the wake of this eruption was antinatalism, which refers to the conviction that human reproduction (...) should be brought to an absolute halt. This is the most modern outgrowth of the death of God and represents the most radical face of secular humanism. In spite of the admittedly dark fumes that leak out from the term ‘antinatalism’, this philosophical position emerges quite naturally when we consider the depletion of our traditional sources of philosophical enquiry. (shrink)

The idea that immoral behaviour can sometimes be admirable, and that moral behaviour can sometimes be less than admirable, has led several of its supporters to infer that moral considerations are not always overriding, contrary to what has been traditionally maintained. In this paper I shall challenge this inference. My purpose in doing so is to expose and acknowledge something that has been inadequately appreciated, namely, the moral aspect of nonmoral goods and evils. I hope thereby to show that, even (...) if immorality can be admirable, this poses no threat to morality. (shrink)

One of the most striking differences between Frege's Begriffsschrift (logical system) and standard contemporary systems of logic is the inclusion in the former of the judgement stroke: a symbol which marks those propositions which are being asserted , that is, which are being used to express judgements . There has been considerable controversy regarding both the exact purpose of the judgement stroke, and whether a system of logic should include such a symbol. This paper explains the intended role of the (...) judgement stroke in a way that renders it readily comprehensible why Frege insisted that this symbol was an essential part of his logical system. The key point here is that Frege viewed logic as the study of inference relations amongst acts of judgement , rather than – as in the typical contemporary view – of consequence relations amongst certain objects (propositions or well-formed formulae). The paper also explains why Frege's use of the judgement stroke is not in conflict with his avowed anti-psychologism, and why Wittgenstein's criticism of the judgement stroke as 'logically quite meaningless' is unfounded. The key point here is that while the judgement stroke has no content , its use in logic and mathematics is subject to a very stringent norm of assertion. (shrink)

Recent evidence in natural and semi-natural settings has revealed a variety of left-right perceptual asymmetries among vertebrates. These include preferential use of the left or right visual hemifield during activities such as searching for food, agonistic responses, or escape from predators in animals as different as fish, amphibians, reptiles, birds, and mammals. There are obvious disadvantages in showing such directional asymmetries because relevant stimuli may be located to the animal's left or right at random; there is no a priori association (...) between the meaning of a stimulus (e.g., its being a predator or a food item) and its being located to the animal's left or right. Moreover, other organisms (e.g., predators) could exploit the predictability of behavior that arises from population-level lateral biases. It might be argued that lateralization of function enhances cognitive capacity and efficiency of the brain, thus counteracting the ecological disadvantages of lateral biases in behavior. However, such an increase in brain efficiency could be obtained by each individual being lateralized without any need to align the direction of the asymmetry in the majority of the individuals of the population. Here we argue that the alignment of the direction of behavioral asymmetries at the population level arises as an “evolutionarily stable strategy” under “social” pressures occurring when individually asymmetrical organisms must coordinate their behavior with the behavior of other asymmetrical organisms of the same or different species. Key Words: asymmetry; brain evolution; brain lateralization; development; hemispheric specialization; laterality; lateralization of behavior; social behavior; theory of games. (shrink)

J. L. Ackrill; VIII*—Aristotle's Definitions of Psuche, Proceedings of the Aristotelian Society, Volume 73, Issue 1, 1 June 1973, Pages 119–134, https://doi.org.

In the course of history, many individuals have the dubious honor of being remembered primarily for an eponym of which they would disapprove. How many are aware that Joseph-Ignace Guillotin actually opposed the death penalty? Another notable case is that of Maria Agnesi, an Italian woman of privileged, but not noble, birth who excelled at mathematics and philosophy during the eighteenth century. In her treatise of 1748, Instituzioni Analitiche, she provided a comprehensive summary of the current state of knowledge concerning (...) both integral calculus and differential equations. Later in life she was elected to the Bologna Academy of Sciences and, in 1762, was consulted by the University of Turin for an opinion on the work of an up-and-coming mathematician named Joseph-Louis Lagrange. (shrink)

This volume includes three previously untranslated transcripts of Kant's logic lectures.

In his list of essential reading, Richard Baxter includes a section on “affectionate practical English writers.” Among others, he mentions George Swinnock. While essentially forgotten today, Swinnock's contemporaries held him in high esteem as a skilful physician of the soul. The focus of this article is Swinnock's view of Scripture meditation as necessary for bridging the gap between head and heart in Christian experience. He encourages his readers to “retire out of the world's company, to converse with the word of (...) God.” He believes this “conversing” warms the heart, causing it to “boil with love” for God. With that basic premise in view, this article is organized around three main sections. The first establishes Swinnock's place in the Puritan meditative tradition, stretching back to Joseph Hall. The second analyzes Swinnock's faculty-focused approach to meditation, whereby it begins in the understanding, extends to the affections, and ends in the will, resulting in practical knowledge. The third section considers Swinnock's teaching on the role of the Holy Spirit in Scripture meditation. As with the other means of grace, meditation is ultimately dependent upon the Holy Spirit to work through it and along with it directly upon the faculties of the soul. The article concludes with Swinnock's threefold approach to transformative Scripture meditation. (shrink)

I agree with Mele that self-deception is not intentional deception; but I do believe that self-deception involves intentional biasing, primarily for two reasons: (1) There is a Bayesian model of self-deception that explains why the biasing is rational. (2) It is implausible that the observed behavior of self- deceivers could be generated by Mele's “blind” mechanisms.

In his paper ‘‘Bad luck once again’’ Neil Levy attacks our proof of the consistency of libertarianism by reiterating a time-worn compatibilist complaint.1 This is, that what is not determined must be due to chance. If A has a choice of X or Y, neither X nor Y being causally determined, then if A chooses X it can only be by chance, never for a reason. The only ‘‘reason’’ that could explain the choice of X over Y would have to (...) be a causally sufficient reason, which would rule out A’s having a genuine choice in the first place. Either X is causally necessitated or X is realized by sheer luck. But that these are the only alternatives is untrue. The exercise of deliberative reason opens the way between the Scylla of causal necessitation and the Charybdis of chance, as we shall try to make clear. The central core of Levy’s argument is that any attempt to give a reasons-based explanation of a contrastive fact must fail. A contrastive fact is a fact of the kind ‘‘Jane decides to vacation in Hawaii rather than Colorado,’’ or ‘‘Jane assigns a greater weight to surfing that to white-water rafting.’’ In the last three paragraphs of his paper Levy argues that Jane’s assigning more weight to surfing than to rafting cannot be a reasons-based assignment, because, as he puts it, ‘‘the reasons that would explain the weighting are the weighted reasons themselves.’’ Similarly, prior to making her Hawaii⁄ Colorado decision, Jane has.. (shrink)

Trust is a temporary attachment between humans that pervades our daily lives. Recent research has shown that the affiliative hormone oxytocin rises with a social signal of interpersonal trust and is associated with trustworthy behavior (the reciprocation of trust). This commentary reports these results and relates them to the target article's findings for variations in affiliative-related behaviors.