This paper gives two complete and elementary proofs that if the speed of light over closed paths has a universal value c, then it is possible to synchronize clocks in such a way that the one-way speed of light is c. The first proof is an elementary version of a recent proof. The second provides high precision experimental evidence that it is possible to synchronize clocks in such a way that the one-way speed of light has a universal value. We (...) also discuss an old incomplete proof by Weyl which is important from an historical perspective. (shrink)

Per uscire dalle aporie delle proprie conseguenze, la scienza deve vedere riconosciuto l'atto come uno dei propri principi fondamentali (accanto all'ente e alla parola). Scienza è, infatti, mettere in relazione le cose (la "natura") con delle leggi matematiche (vale a dire con dei simboli e dei concetti). Ma mettere in relazione è un atto. Sicché, la scienza si fonda su tre principi (ente, parola, atto) e sui corrispettivi campi filosofici (ontologia, logica, etica). Tenere conto di quest'ambito triadico serve a mostrare (...) che l'epistemologia non è un sapere neutro e descrittivo, ma è un prendere partito: al tempo stesso dal punto di vista etico, politico, morale e giuridico. (shrink)

This paper gives two complete and elementary proofs that if the speed of light over closed paths has a universal value c, then it is possible to synchronize clocks in such a way that the one-way speed of light is c. The first proof is an elementary version of a recent proof. The second provides high precision experimental evidence that it is possible to synchronize clocks in such a way that the one-way speed of light has a universal value. We (...) also discuss an old incomplete proof by Weyl which is important from an historical perspective. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Parenting Children With Autism Spectrum Disorders Through the Transition to AdulthoodAnonymous One, Anonymous Two, Lorri Centineo, Anonymous Three, Virginia Clapp, Catherine Cornell, Nancy Coughlin, David McDonald, Mark Osteen, Laura Shumaker, Julie Van der Poel, Anonymous FourMy Son's Life with Autistic Spectrum DisorderAnonymous OneThis is the story of how my son, David, has tried to become independent. David is now 25–years–old. His immediate family is his dad, a brother (...) (age 22) and myself (his mother). He was diagnosed with an autism spectrum disorder (ASD) when he was 13. We looked up all the information and decided not to make a big deal of it. Looking back, he displayed all the classic signs of a high functioning autistic disorder. Would he have been diagnosed with the new DSM 5 guidelines? He probably would have. His life would be much, much different if he had been diagnosed at an early age.I'll start with David at age 13 when he was able to harness his big interest in computer science into a career for himself. He was expelled from middle school for threatening some kid that had been picking on him all year. He had a meltdown and wasn't able to communicate his side of the story and that was it.During the summer of that year he took classes in computer engineering (Microsoft) and became an engineer when he was 13. At that time it was quite an accomplishment because he was the youngest person in the United States to do so at such a young age. (By the way, the administration of the school that expelled him sent him a congratulatory card when he was written up in the paper).His father and uncle are in business running a computer company so David had a ready–made job waiting for him when he graduated from high school and was able to keep it during difficult times. David finished high school (mainstreamed special education as emotionally disturbed) and he also received another engineering certification (Cisco).I have to mention here that I truly did not understand what it was like for my son until one day when he was in high school, as I was lecturing him again for some stupid reason, he said, "You don't know how hard it is for me to not sit in a corner and rock every day." Think about that. ASD individuals get up and keep going every day when they know they are going to be misunderstood and picked on. They all deserve a medal for bravery.David became really upset that he had never had a date and that girls were not even interested in talking to him. He started cutting himself and shaving his head. That got him some attention from the stoner group. He had someone to sit with at lunch anyhow. Parents, I think it's better to have no friends than the wrong friends. They introduced him to drugs.We did not mention any trouble David was having to any relatives. We had lived 800 miles from our families in a very unspoiled part of northern America. In hindsight this was not good either. [End Page 151]Another thing, and I think every parent will agree with this—teachers, school staff, health care industry staff, doctors and every one that comes into contact with an ASD individual—take the time to get to know them. It may be difficult and some may appear non–caring and rude. You must overlook this and look to the person underneath. They are great people. They have been through stuff and it means so much to them. Like I said—parents, you know this. Please remember it when times get tough.During David's senior year he started work release so he could start earning money to buy a car and move out as soon as he turned 18. Things were made easy for David since the company was owned by his father and his uncle and I worked there also. David enjoyed the work but had the occasional meltdown and had difficulties fitting in with other employees. He wasn't able to communicate... (shrink)

The strongly innovative theory of whole-parts relations outlined by Husserl in his Third logical Investigation—to which he attributed a basic value for his entire phenomenology—has recently attracted a renewed interest. Although many important issues have been clarified (especially by Kit Fine) the subject seems still worth being revisited. To this aim Husserlian universes are introduced. These are lower bounded distributive lattices endowed with a unary operation of defect and a binary relation of isogeneity. Husserl's contents are identified with nonzero elements (...) of a Husserlian universe and the dependence relations among contents are defined and studied starting from the idea that the defect of xis what x needs in order to ‘exist’ i.e., in order to be ‘closed’ with respect to the closure operation defined as the sup of x and its defect. It turns out that there are (at least) eight dependence relations which are worth to be considered. Many other questions concerning the world of contents (among them the proofs of the famous Husserl's Sätze) may now be discussed and clarified. Then the theory of species and genera is developed. Ultimate species (for short: species) are identified with equivalence classes of contents modulo isogeneity, and species in general (for short: genera) are identified with arbitrary unions of species. On the basis of the relation obtaining among two contents when they are isogeneous to two contents the first of which is a part of the second it becomes possible to develop a rather satisfying interpretation of Husserl's theory of the dependencies among species and genera and of the material a priori laws. By strengthening the notion of Husserlian universe into the notion of rigid Husserlian universe, the theory of species and genera obtains a stronger version. Three models of the theory are exhibited. The first one, suggested by combinatorial-topological considerations, identifies contents with finite non-empty sets of natural numbers; the second one identifies contents with non-empty sets of formulas of a formal language; the third one (not totally ‘rigid’) identifies contents with positive integers. (shrink)

The mental representation of one’s own body does not necessarily correspond to the physical body. For instance, a dissociation between perceived and actual reach-ability has been shown, that is, individuals perceive that they can reach objects that are out of grasp. We presented participants with 3D pictures of objects located at four different distances, namely near-reaching space, actual-reaching space, perceived-reaching space and non-reaching space. Immediately after they were presented with function, manipulation, observation or pointing verbs and were required to judge (...) if the verb was compatible with the object.Participants were faster with function and manipulation verbs than with observation and pointing verbs. Strikingly, with both function and manipulation verbs participants were faster when objects were presented in actual than the perceived reaching space. These findings suggest that our knowledge of the world is implicitly built online through behaviour, and is not necessarily reflected in explicit estimates or conscious representations. (shrink)

Dapprima due indizi. Il primo: si può affermare che le due domande “Come si chiama il libro che stai leggendo?” e “Come si intitola il libro che stai leggendo?” siano immediatamente comprensibili ed equivalenti. Difficilmente però un parlante sente come equivalenti le domande “Come si chiama quell’edificio?” e “Come si intitola quell’edificio?”. Mentre la prima domanda è chiarissima, la seconda susciterà un’ulteriore domanda di chiarimento: “Che cosa intendi per titolo dell’edificio?”. Per un...

This book is focused on the first three parts of Bolzano's Theory of Science and introduces a more systematic reconsideration of Bolzano's logical thought. In undertaking this task, the book is intended as an exploration, not so much of the more specifically discursive aspects of Bolzano's logical thought - already amply studied - as much as on identifying the singularly coherent and systematic nature of the logic presented in Bolzano's work.