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Neutrinos and Beyond — Opening a New Era of Cosmic-Ray Research
ADVERTISEMENT FEATURE THE UNIVERSITY OF TOKYO Neutrinos and beyond — Opening a new era of cosmic-ray research Takaaki Kajita, a recipient of the 2015 that neutrinos are massless. These discov- Nobel Prize in Physics, and other re- eries, which resulted in Kajita’s 2015 Nobel searchers at the University of Tokyo’s Prize in Physics, were made a team led by Institute for Cosmic Ray Research (ICRR) him in 1998. have been exploring new realms in par- Kajita acknowledged his success owed ticle physics research. Kajita’s work on a lot to the strong support he received neutrinos and related research at ICRR from two mentors and former supervisors is leading the world in this field. — Masatoshi Koshiba and Yoji Totsuka. Koshiba was awarded the 2002 Nobel Prize The path to a Nobel prize in Physics for detecting neutrinos pro- Particle physics and astrophysics are duced in supernovae using Kamiokande, among the most active research fields at the predecessor of Super-Kamiokande. the University of Tokyo, and its Institute for Totsuka led the Super-Kamiokande proj- Cosmic Ray Research (ICRR) is leading the ect as Koshiba’s successor. Totsuka’s con- world with explorations in these areas. ICRR tribution was so great that many believe is best known for its research on neutrinos he would have shared the Nobel Prize with using the world’s largest underground neu- Kajita if he were alive. trino detector, Super-Kamiokande. The de- Kajita’s award-winning work dates tector is located in a mine in central Japan back to 1986 when he earned his PhD for and is filled with 50,000 tons of pure water. -
Biography (Modified, After Festetics 1983)
Konrad Lorenz’s Biography (modified, after Festetics 1983) 1903: Konrad Zacharias Lorenz (KL) was born in Altenberg /Austria on Nov. 7 as the last of three children of Emma Lorenz and Dr. Adolf Lorenz, professor for orthopedics at the Medical branch of the University of Vienna. In the same year the representative and spacious Altenberg family home was finished. 1907: KL starts keeping animals, such as spotted newts in aquaria, raises some ducklings and is not pleased by his first experiences with a dachshound. Niko Tinbergen, his lifelong colleague and friend, is born on April 15 in Den Haag, The Netherlands. 1909: KL enters elementary school and engages in systematic studies in crustaceans. 1910: Oskar Heinroth, biologist and founder of "Vergleichende Verhaltensforschung" (comparative ethology) from Berlin and fatherlike scientific mentor of the young KL publishes his classical paper on the ethology of ducks. 1915: KL enters highschool (Schottengymnasium Wien), keeps and breeds songbirds. 1918: Wallace Craig publishes the comparative ethology of Columbidae (pigeons), a classics of late US biologist Charles O. Whitman, who was like O. Heinroth, a founding father of comparative ethology. 1921: KL excels in his final exams. Together with friend Bernhard Hellmann, he observes and experiments with aggression in a cichlid (Herichthys cyanoguttatum). This was the base for KL's psychohydraulic model of motivation. 1922: Father Adolf sends KL to New York to take 2 semesters of medicine courses at the ColumbiaUniversity, but mainly to interrupt the relationship of KL with longterm girlfriend Gretl Gebhart, his later wife. This paternal attempt to influence the mate choice of KL failed. -
Chapter 1, Version A
GENDERING THE WORKPLACE: THE DISPOSITIF OF CONTEMPORARY WESTERN SCIENCE Janice McGibbon Crerar Bachelor of Science (Hons.) Graduate Diploma Secondary Education Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy Northern Institute College of Indigenous Futures, Arts and Society Charles Darwin University September 2018 Keywords science; science education; sex/gender; feminist; poststructural; performativity. Gendering the workplace: the dispositif of contemporary western science i Abstract This thesis interrogates qualitative data from women scientists and women science teachers using feminist poststructural techniques. Social elements and power relations that produce and reproduce the ‘problem’ of women and science are described through the application of Foucauldian methodology. The interrelation and interplay of material and immaterial elements of the dispositif of contemporary Western science are used to identify potential points of disruption. Relations between sex/gender and science emerge as key elements in producing and reproducing discourses, statements and practices that maintain societal status quo in relation to the problem of women and science. The impact of binary categorisation of sex/gender definitions in policy, legislation and practice is critically examined in relation to social theories of gender subjectification, drawing on Judith Butler and Luce Irigaray. Through this analysis, the problem of women and science can be seen as an outcome of socio-cultural conditions of patriarchy emerging at the time of the Enlightenment and persisting into the 21st Century, despite legislation and rhetoric to the contrary. Many current programs, policies and initiatives are unlikely to effect the change required since they maintain the social conditions that make the problem inevitable. Instead, future research and educational strategies are recommended to disrupt the problem of women and science by challenging social assumptions about sex and gender. -
Research in Kamioka and Kakenhi Takaaki Kajita Director of Institute for Cosmic Ray Research (ICRR) the University of Tokyo Rese
Research in Kamioka and Kakenhi Takaaki Kajita Director of Institute for Cosmic Ray Research (ICRR) The University of Tokyo Research Theme Implemented in FY2017: First Detection of Gravitational Waves Using Cryogenic Laser Interferometer (Grant-in-Aid for Specially Promoted Research) I have conducted research underground Kamioka, Gifu Prefecture, since I was a graduate student. The first experiment I participated in was the Kamioka Nucleon Decay Experiment (Kamiokande). The experiment was initially proposed by Professor Masatoshi Koshiba, who was my thesis advisor, to search for proton decay. Professor Koshiba collaborated with a company to develop an unprecedentedly large 50-centimeter diameter photomultiplier tube (PMT) for the Kamiokande experiment. The PMT served a very important role in supernova neutrino observations that verified the supernova explosion mechanism and solar neutrino observations that confirmed the so-called solar neutrino problem. It is well known that, due to these achievements, Professor Koshiba received the Nobel Prize in physics in 2002. It is common for a large apparatus such as this to be realized by submitting a budget request from a host institute after long, vigorous discussions in relevant researcher communities. In this case, however, the enthusiasm of the relevant researchers in view of the importance of Kamiokande experiments made it possible to realize the experiment quickly with funds from various sources. Kamiokande initially materialized through collaboration with the University of Tokyo’s School of Science, to which Professor Koshiba belonged, the former National Laboratory for High Energy Physics (KEK), and the Institute for Cosmic Ray Research (ICRR) of the University of Tokyo. Although I was only a graduate student at that time and knew nothing about budgets, all of us participating in the effort recognized that people thought that this experiment was very important and endeavored to realize it as soon as possible. -
1 FY 2015 Follow-Up of WPI Program by Program Committee February
FY 2015 Follow-up of WPI Program By Program Committee February 2016 (This document reports on progress made under the WPI Program in FY 2014.) In FY2015, there were three important achievements: 1. Nobel Prize in physics awarded to Dr. T. Ka j i t a, P I of Kavli IPMU. (see section A, p2) 2. International Research Excellence Initiative (REI) workshop held jointly with Program committee meeting. (see section E, p5) 3. Future plan devised by the WPI program committee (see section E, p5) A. Dr. Takaaki Kajita, PI of Kavli IPMU, was awarded The 2015 Nobel Prize .................................... 2 B. Outline of WPI program .......................................................................................................... 2 C. WPI Centers ........................................................................................................................... 3 D. Follow up ............................................................................................................................... 4 E. REI International Workshop and 2015 Program committee meeting ........................................... 4 E-1. REI International Workshop ................................................................................... 5 E-2. Program committee meeting .................................................................................. 5 E-3. Future plan of WPI program ................................................................................... 5 F. Site visits .............................................................................................................................. -
Imagine, a World Without DIS-EASE Is It Possible?
Imagine, A World Without DIS-EASE – Is It Possible? Mark S. Grenon Imagine, A World Without DIS-EASE Is It Possible? Mark S. Grenon Volume One Copyright © 2018 Mark S. Grenon All rights reserved. ISBN-13: 978-1727749144 ISBN-10:1727749146 Imagine, A World Without DIS-EASE – Is It Possible? Mark S. Grenon In LOVING Memory of Bishop David “Maverick” Glover for his help and dedication to creating “a world without dis-ease”! Imagine, A World Without DIS-EASE – Is It Possible? Mark S. Grenon 100% of the proceeds from this book will be donated to the Genesis II Church of Health and Healing to support its workers and support official G2 Projects around the world to help create, “a world without dis-ease.” REAL SCIENCE: We at the Genesis II Church of Health and Healing have been involved in one of the most comprehensive, worldwide, cross cultural, broad spectrum, voluntary, human health studies of this world for the past 8 years. If you include Jim Humble and his studies in Africa, it has been almost 20 years. 95% of the world's diseases have been CURED with the Genesis II Church Protocols! No monies were received from any pharmaceutical/medical companies wanting a certain result. The people of this world who have followed the G2C protocols have not been paid in any way, but they have “self-dosed” themselves voluntarily. “Self-Care” is what is being taught and encouraged by the Genesis II Church worldwide and it is working incredibly well. Every person on this earth has the God-given right to control their own health and not rely on the pharmaceutical/medical industry. -
The Solar Neutrino Problem Has Not Been Solved
I S S N 2 3 4 7 - 3487 Volume 13 Number 4 Journal of Advances in Physics The Solar Neutrino Problem Has Not Been Solved Jamal S. Shrair Helical Universe www.helical-universe.info [email protected] ABSTRACT A closer look at the data collected from different detectors, reveal that the so-called solar neutrino problem is far from being solved. And contrary to the assessment of the Nobel Committee, the experimental results from the Sudbury Neutrino Observatory cannot be regarded as a confirmation of the Standard Solar Model. In fact, the obsoleteness of the current model has been recently exposed by the crisis of solar abundance. Furthermore, using images obtained by the Solar Dynamics Observatory, researchers found the convective motions (the plasma motions within the Sun's interior) to be nearly 100 times smaller than current theoretical expectations. This is a clear verdict on the notion of thermonuclear reactions that are supposed to be the processes that generate solar neutrinos. KEYWORDS Solar neutrino problem, neutrino oscillations, neutrino detectors, solar physics, standard solar model, astrophysics, ACADEMIC DISCIPLINE AND SUB-DISCIPLINES Solar physics and Astrophysics SUBJECT CLASSIFICATION Fundamental Solar Physics and Astrophysics TYPE (METHOD/APPROACH) Quantitative and Qualitative INTRODUCTION Based on the hypothesis of the standard solar model, the number of neutrinos produced by the Sun per second is approximately 1.8 x , which means 400 trillion neutrinos pass through our bodies every second. The model, also assumes that the absolute majority of neutrinos is, generated from the P-P reaction, and 99.99% of solar neutrinos have energy which is far too low for detection. -
Super-Kamiokande: the Road to Neutrino Oscillations
Super-Kamiokande: The Road to Neutrino Oscillations James Stone Boston University A Symposium on the Occasion of the Benjamin Franklin Medal for the Experimental Discovery of Neutrino Oscillations April 25, 2007 Philadelphia April 1, 1996 Atmospheric Neutrinos Yoji Totsuka James Stone McDonald/Totsuka Symposium 2 Fluxes (106 cm-2s-1) •e : 1.76(11) •, : 3.41(66) •TOTAL:5.09(64) •SSM :5.05 Art McDonald (ee ) ( ) (SSM) Solar Neutrinos James Stone James Stone McDonald/Totsuka Symposium 3 Plan for Today’s Talk Focus on the role of atmospheric neutrinos in revealing neutrino oscillations. Tell the story of large water Cherenkov detectors and why we built them. Give details of the initial discovery of neutrino oscillations and the current data. Present additional checks and confirmations. Preview the future for precision measurements in neutrino physics. I’ll start with some historical milestones ... James Stone McDonald/Totsuka Symposium 4 Discovery of the Free Neutrino, 1956 “Project Poltergeist” Hanford and Savannah River Reactors p n e Fred Reines Clyde Cowan Liquid Scintillator with Cadmium Phys. Rev. Lett. 92:330 (1953) Science 124(3201):103 (1956) “... A Confirmation” Phys. Rev. 117(1) :159 (1960) James Stone McDonald/Totsuka Symposium 5 Oscillations and Neutrino Flavor Bruno Pontecorvo first suggested the possibility of neutrino oscillations if they had a small mass. Since only one neutrino was known, he was thinking that analogous to KK 00 mixing: J.Exp.Theor.Phys. 33 549 (1957) J.Exp.Theor.Phys. 34 247 (1957) In 1962, Lederman, Schwartz, Steinberger, et al. published evidence for the muon neutrino the their BNL/AGS experiment. -
21.8 N&V PJ BG.Indd
NEWS & VIEWS NATURE|Vol 454|21 August 2008 OBITUARY Yoji Totsuka (1942–2008) Leader in the discovery of neutrino oscillations. Yoji Totsuka, a major figure in the world of of the supernova and of the neutrinos particle physics, died on 10 July after a long themselves. battle with cancer. He was a leading light Shortly after the supernova, Koshiba in the thrilling advances in the physics of retired and Totsuka became leader of neutrinos over the past 30 years, and was the Kamiokande project. Two seminal a notably resolute figure in seeing through results from the group were subsequently the rebuilding of the Super-Kamiokande published. The first observed a deficit in neutrino detector after a disastrous accident atmospheric neutrinos that could not be in 2001. explained by systematic experimental errors Born on 6 March 1942, in Fuji, Japan, or uncertainties in the background neutrino Totsuka received his bachelor’s, master’s and flux. Instead, some “as-yet-unaccounted-for PhD degrees from the University of Tokyo. physics”, as the paper put it, might explain His thesis project studied ultra-high-energy the data. The second crucially confirmed the particle interactions, so kick-starting his solar neutrino deficit recorded by Davis. lifelong passion for particle physics. As a In 1991, Totsuka obtained funding for a Totsuka also supervised the successful research associate with the University of successor to Kamiokande. This was Super- Belle B-factory, where particles known as Tokyo, he then travelled to the Deutsches Kamiokande, an underground detector B-mesons were generated to study differences Electron Synchrotron Laboratory in that contained 50,000 tons of water. -
Discovery of Atmospheric Neutrino Oscillations
Nobel Lecture Dec 8, 2015 Takaaki Kajita Institute for Cosmic Ray Research, The Univ. of Tokyo Atmospheric Neutrino Oscillations 1 Outline • Introduction: Kamiokande - the starting point - • Atmospheric neutrino deficit • Discovery of neutrino oscillations • Recent results and the future • Summary • Acknowledgements Atmospheric Neutrino Oscillations 2 Introduction: Kamiokande - the starting point - Atmospheric Neutrino Oscillations 3 Kamioka Nucleon Decay Experiment (Kamiokande) In the late 1970’s, new theories that unify Strong, Weak and Electromagnetic forces were proposed. These theories predicted that protons and neutrons (i.e., nucleons) should decay with the lifetime of about 1028 to 1032 years. Several proton decay experiments began in the early 1980’s. One of them was the Kamiokande experiment. Kamiokande (1000 ton Detector fiducial wall volume) Cherenkov light Photo detectors Charged particle Atmospheric Neutrino Oscillations 4 Kamiokande construction team (Spring 1983) M. Takita TK A. Suzuki T.Suda M. Nakahata K. Arisaka M. Koshiba Y. Totsuka T. Kifune Atmospheric Neutrino Oscillations 5 What are neutrinos? • Neutrinos; • are fundamental particles like electrons and quarks, • have no electric charge, • have 3 types (flavors), namely electron-neutrinos (νe), muon-neutrinos (νµ) and tau-neutrinos (ντ), • are produced in various places, such as the Earth’s atmosphere, the center of the Sun, …. • can easily penetrate through the Earth, the Sun… • can, however, interact with matter very rarely. A νµ produces a muon. A νe produces -
CP Violation and Flavor Mixing Makoto Kobayashi KEK and JSPS Plan
CP Violation and Flavor Mixing Makoto Kobayashi KEK and JSPS Plan 1. Introduction to the Standard Model 2. Sakata and His Group 3. The CP Paper with Maskawa 4. Experimental Verification at B-factories 5. Lepton Flavor Mixing Introduction to the Standard Model u d u Electron p Proton(p) n Nucleus d d u Atom Neutron(n) Introduction to the Standard Model Fundamental Particles u c t Quark d s b e μτ Lepton νe νμ ντ Fundamental Interactions • Strong Interaction QCD • Electro‐Magnetic Interaction • Weak Interaction Weinberg‐Salam‐Glashow Theory Introduction to the Standard Model Established in 1970’s ・ Development of gauge theory 1971 ‘t Hooft Electro‐Magnetic Interaction Strong Interaction Weak Interaction ・ Discoveries of new flavors u c t 1964 Gell‐Mann quark model d s b u, d, s e μτ 1973 Kobayashi Maskawa νe νμ ντ Six‐Quark Model After 1970 Sakata and His Group 1947∼ Discovery of Strange Particles Hadron : strongly interacting particle p n π±0 Λ ΛΣΞ±0 KK± 0 Λ lairmoeM kata Saf osyteruoC Archival Library Strange Particles Shoichi Sakata 1911-1970 1956 Sakata Sakata Model All the hadrons are composite states of p,, n Λ : Fundamental Triplet Sakata and His Group Weak Interaction in the Sakata Model - decayβ n→ p + − e ν + strange paticle→Λ p + e− ν + p ν n Λ e μ 1959 Gamba, Marshak, Okubo B‐L Symmetry 1960 Maki, Nakagawa, Ohnuki, Sakata Nagoya Modelp : = B+ν ,, n = B+ e Λ+ =μ B Sakata and His Group 1962 Discovery of Two Neutrinos ν e ν μ Lepton Flavor Mixing e μ MNS Matrix 1962 Maki, Nakagawa, Sakata + + + + p = B ν1 , n = B e , Λ = B μ , p'= B ν 2 ν1 = cosθ ν e + sinθ ν μ ν 2 = −sinθ ν e + cosθ ν μ Neutrino Oscillation 4th Fundametal Particle (GIM scheme) 1962 Katayama, Matumoto, Tanaka, Yamada Sakata and His Group Cosmic Ray Events 1971 Niu et al. -
Dr. Takaaki Kajita: Tackling the Mysteries of the Universe By
Japan’s 2015 Nobel Prize Winners Tackling the Mysteries of the Universe by Studying Neutrinos Dr. Takaaki Kajita, Nobel Prize in Physics Dr. Takaaki Kajita, director of the Institute for Cosmic Ray Research (ICRR) at the University of Tokyo, was one of the two winners of the 2015 Nobel Prize in Physics. The award was for the discovery of a type of neutrino oscillation; this showed that neutrinos have mass, contrary to what was previously assumed. In announcing the award, the Royal Swedish Academy of Sciences noted, “The discovery has changed our understanding of the innermost workings of matter and can prove crucial to our view of the universe.” Neutrinos are among the most common particles in the universe. They are constantly flying through the space around us in large numbers. But since they very rarely react to other matter, they are extremely difficult to detect. They have been studied at an observatory in Kamioka, Gifu Prefecture, using detectors—Kamiokande and its successor, Super-Kamiokande—installed in a mine site 1,000 meters (about 0.6 miles) underground to avoid interference from unrelated cosmic rays. Now plans are being made for an even more powerful detector, Hyper-Kamiokande. Dr. Kajita began his study of neutrinos as a research associate at the University of Tokyo in 1986. Neutrinos are observed using a huge tank full of purified water and highly sensitive photomultiplier tubes to detect the light given off on the rare occasions when a neutrino strikes a water molecule. Based on analysis of a tremendous volume of observational data, in 1998 he discovered the phenomenon of neutrino oscillation, meaning that the particles sometimes change type.