The presence of vegetation on railway tracks threatens track safety and longevity. However, vegetation inspections in Sweden are currently being carried out manually. Manually inspecting vegetation is very slow and time consuming. Maintaining an even quality standard is also very difficult. A machine vision-based approach is therefore proposed to emulate the visual abilities of the human inspector. Work aimed at detecting vegetation on railway tracks has been split into two main phases. The first phase is aimed at detecting vegetation on (...) the tracks using appropriate image analysis techniques. The second phase is aimed at detecting the rails in the image to determine the cover of vegetation that is present between the rails as opposed to vegetation present outside the rails. Results achieved in the current work indicate that the machine vision approach has performed reasonably well in detecting the presence/absence of vegetation on railway tracks when compared with a human operator. (shrink)

This book recalls, for nonscientific readers, the history of quantum mechanics, the main points of its interpretation, and Einstein's objections to it, together with the responses engendered by his arguments. We point out that most popular discussions on the strange aspects of quantum mechanics ignore the fundamental fact that Einstein was correct in his insistence that the theory does not directly describe reality. While that fact does not remove these counterintuitive features, it casts them in a different light."--page vi.

The present essay looks to add to the body of literature that seeks to clarify the nature of vengeance and evaluate it morally. However, unlike previous philosophical investigations of vengeance, my essay examines it not from the standpoint of impersonal justice but from the perspective of the one who seeks it, to determine whether it is good for the would-be avenger. The values I measure it by are fulfillment and self-knowledge. The paper has two major parts. In the first, I (...) argue that vengefulness is motivated by two ends: allaying a sense of vulnerability and preserving a positive self-conception. The emotional benefits of a vengeful disposition, I claim, come at the expense of self-knowledge. They are therefore unstable and prone to give way when vengefulness is translated into action. In the second part, I try to substantiate this claim by examining two criticisms of vengeance: that its pursuit can diminish the avenger by consuming him and that it is self-defeating. Framing vengefulness within broader psychoanalytic accounts of the repetition compulsion and projection, I endorse versions of both criticisms that tie vengeance’s failure to provide fulfillment to some of the ways in which it occludes self-knowledge. (shrink)

The derivation of the expression for the density matrix of scattered particles in terms of that of the incident ones, taking different impact parameters into account, shows that under well-specified and realistic conditions, the final density matrix is of the same kind as the initial one. Thus the final mixed state after a collision can be used directly as the initial mixed state in a subsequent collision. Contrary to a recent claim by Band and Park, there are no “fundamental difficulties (...) with quantum mechanical collision theory.”. (shrink)

Breathing ground -- Moving in nature -- Making buildings -- Modifying places -- My kind of countryside.

Before they can commit their states to war, leaders who believe that war is necessary must first secure public commitment to collective action and sacrifice. The chief instrument for achieving this...

Much of Thomas Hobbes's work can be read as historical commentary, taking up questions in the philosophy of history and the rhetorical possibilities of written history. This collection of scholarly essays explores the relation of Hobbes's work to history as a branch of learning.

Locke was born in Wrington, Somerset, on 29 August 1632. After the Civil War he was sent to Westminster School, and in 1652 to Christ Church, Oxford. A feature of the university in Locke's early years was growing interest in the natural sciences, fostered by, amongst others, Robert Boyle, John Wilkins, and Robert Hooke. After graduating, Locke was much attracted to the work of these men, and soon he was engaged in medical research with Robert Boyle. He remained in Oxford (...) until 1667, when a chance meeting with Anthony Ashley Cooper, later Lord Shaftesbury, led to his joining Shaftesbury's London household, which from then on became Locke's usual residence, and where he acted as Shaftesbury's personal physician, conducted research with Thomas Sydenham. and became a Fellow of the Royal Society. (shrink)

Examines the aims and tools of science for creating theories and explanations of phenomena, with an eye to answering the question of whether or not science ...

Daryl Pullman’s (2023) article in this issue of the American Journal of Bioethics thoughtfully compares influencing factors in the uptake of assisted suicide and euthanasia practices in Canada and...

Forensic science error rates are needlessly high. Applying the perspective of veritistic social epistemology to forensic science could produce new institutional designs that would lower forensic error rates. We make such an application through experiments in the laboratory with human subjects. Redundancy is the key to error prevention, discovery, and elimination. In the “monopoly epistemics” characterizing forensics today, one privileged actor is asked to identify the truth. In “democratic epistemics,” several independent parties are asked. In an experiment contrasting them, democratic (...) epistemics reduced the rate at which biased observers obscured the truth by two-thirds. These results highlight, first, the potential of “epistemic systems design,” which employs the techniques of economic systems design to address issues of veracity rather than efficiency, and second, the value of “experimental epistemology,” which employs experimental techniques in the study of science. (shrink)

It is widely believed that a person's traits can function as reasons for loving her. Notable contemporary work in the philosophy of love has taken the rejection of this premise as its point of departure. As far as I can tell, none of that work has engaged with a careful philosophical exposition of the view under discussion. In the following pages, I will defend the idea of trait-based love against three of its critics and one of its advocates. I will (...) discuss work on this topic by Harry Frankfurt, Niko Kolodny and David Velleman, arguing that their criticisms fail and that the alternatives they offer to trait-based love create more difficulties than they solve. What these authors have in common is a deflationary approach to love that reduces it to a beneficent disposition, a valuing relationship and a visceral form of moral regard, respectively. I will compare these to the multiplex, nuanced depiction of trait-based love in Plato's Symposium. While it is plausible that love can motivate a beneficent disposition, develop in relationships and entails moral regard, I will argue that the attempt to reduce it to any of the foregoing fails. Frankfurt, Kolodny and Velleman reject trait-based love in part because they think it would differ in unacceptable ways from the love most of us practice. Plato advocates the cultivation of a love that in some respects resembles the picture of trait-based love the contemporary authors balk at. However, unlike those critics, he appreciates that trait-based love need not resemble the ideal he proposes. His richer view of love accounts for elements such as need and feeling that the contemporary thinkers are driven to implausibly bracket as distractions. As I will try to show, the most compelling criticisms of Platonic love do not tell against its responsiveness to the loved one's traits. I will argue that trait-based love is consistent with an intuitive picture of love and that this commonsense approach is more defensible than competing views in these texts. These authors' disagreements about what can count as reasons for love are bound up with the differences in what each takes love to be. Thus, in the course of arguing for trait-based love, I will critically assess their various proposals as to the nature of love. (shrink)