Forty years of antiprotons

The discovery of the antiproton some 40 years ago and the almost synchronous fall of parity (P) and charge conjugation (C) symmetries were soon followed by the realization that CPT rather than C invariance is the fundamental symmetry connecting matter and antimatter, and that consequently any measurement of the antiproton ' s properties can be interpreted as a test of that symmetry. It is the latter view of the antiproton, as an object of study in its own right, rather than as a means to such other ends as the production of gauge bosons and meson resonances, that is presented here. The authors review the technical steps that have led from the handful of antiprotons observed by Chamberlain, Segre, Wiegand, and Ypsilantis to the intense, high-quality beams available today and show how the state of rest and isolation required for high precision high-quality beams available today and show how the state of rest and isolation required for high precision measurements of their properties can be achieved by confining them in electromagnetic traps or in their microscopic counterparts, exotic atoms. The test bench role of antiprotons and antihydrogen atoms for both CPT symmetry and the gravitational weak equivalence principle is discussed, and the body of experimental results obtained since 1955 critically reviewed from this standpoint. Future experiments are then discussed in the light of the closure of the CERN Low Energy Antiproton Ring (LEAR), its replacement in 1999 by the Antiproton Decelerator (AD), and the likely antiproton source at the Japan Hadron Facility

Production planning and control: an investigation

The objective of this research is to identify how production planning and control theory may be successfully applied in a practical situation. The thesis is presented in two distinct parts: Part 1 representing a survey of literature concerned with theory and research findings on production planning and control; part 2 focuses on the development of selected material from the literature survey and the application of the product to an actual industrial situation where the appropriateness is tested. [Continues.

Advances in Computer Science and Engineering

The book Advances in Computer Science and Engineering constitutes the revised selection of 23 chapters written by scientists and researchers from all over the world. The chapters cover topics in the scientific fields of Applied Computing Techniques, Innovations in Mechanical Engineering, Electrical Engineering and Applications and Advances in Applied Modeling

A Promethean Philosophy of External Technologies, Empiricism, & the Concept: Second-Order Cybernetics, Deep Learning, and Predictive Processing

Beginning with a survey of the shortcoming of theories of organology/media-as-externalization of mind/body—a philosophical-anthropological tradition that stretches from Plato through Ernst Kapp and finds its contemporary proponent in Bernard Stiegler—I propose that the phenomenological treatment of media as an outpouching and extension of mind qua intentionality is not sufficient to counter the ̳black-box‘ mystification of today‘s deep learning‘s algorithms. Focusing on a close study of Simondon‘s On the Existence of Technical Objectsand Individuation, I argue that the process-philosophical work of Gilbert Simondon, with its critique of Norbert Wiener‘s first-order cybernetics, offers a precursor to the conception of second-order cybernetics (as endorsed byFrancisco Varela, Humberto Maturana, and Ricardo B. Uribe) and, specifically, its autopoietic treatment of information. It has been argued by those such as Frank Pasquale that neuro-inferential deep learning systems premised on predictive patterning, suchas AlphaGo Zero, have a veiled logic and, thus, are ̳black boxes‘. In detailing a philosophical-historical approach to demystify predictive patterning/processing and the logic of such deep learning algorithms, this paper attempts to shine a light on such systems and their inner workingsàla Simondon

Material Growth of InGaAs/InAlAs Superlattices for Quantum Cascade Laser Application

Quantum Cascade Lasers (QCLs) have rapidly advanced to a leading position among infrared light sources, and are being used in a number of chemical sensing and spectroscopic applications. Most of these devices are grown by molecular beam epitaxy (MBE) except for some of those grown by metalorganic chemical vapor deposition (MOCVD). This thesis investigates the material growth of near-infrared (NIR) QCLs of InGaAs/InAlAs lattice-matched system using MOCVD. The effects of various growth parameters were understood by detailed study on the material properties of InGaAs and InAlAs. Also, in-depth study on InGaAs/InAlAs superlattices shows that there exists a growth window to optimize their performance. With proper interruption periods of growth between individual layers, the hetero-interfacial defects can be reduced at high growth temperature without surface degradation of constituent layers. Finally, the preliminary study of NIR QCLs with digital alloys insertion was conducted and some QCLs wafers were grown successfully

Machine

In today’s society of humans and machines, automation, animation, and ecosystems are terms of concern. Categories of life and technology have become mixed in governmental policies and drive economic exploitation and the pathologies of everyday life. This book both curiously and critically advances the term that underlies these new developments: machine. Contents: Introduction: Un/Civil Engineering (Thomas Pringle); Animation of the Technical and the Quest for Beauty (Gertrud Koch); For a Neganthropology of Automatic Society (Bernard Stiegler); The Ecosystem Is an Apparatus: From Machinic Ecology to the Politics of Resilience (Thomas Pringle)

Collider Experiment: Strings, Branes and Extra Dimensions

Selected topics showcasing the exploration for new physics using colliders; presented at TASI 2001.Comment: latex, 46 pages, TASI proceeding