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The principle of relativity requires that no interaction can propagate instantly. Gravitational waves (GW) must exist, propagating with the same speed as light. The specific characters of GW are predicted by Einstein’s general relativity (GR). After decades of efforts to develop detectors, on 11 February 2016, the LIGO and Virgo Collaboration published the discovery of a GW.
The elements of GR relevant for GW production, propagation and detection. How the GR field, which is the dimensionless metric tensor, differs from the other fundamental fields, which have physical dimensions. The instruments and the discovery. After the first observation, dozens of gravitational signals have been detected, the vast majority from merging black holes and one, on 17 August 2017, from the merger of neutron stars. In this case, electromagnetic signals are expected, and have been detected, providing unique information to astrophysics and to fundamental physics as well. The measurement of the speed of the GW and the establishment of a bound on the mass of the graviton.
Chapter 10 takes you to your own professional future. The handy ‘Twelve Principles’ summary enables teachers and school leaders to orient their teaching towards harnessing linguistic diversity for their own professional and personal development, and for the wellbeing and academic achievement of students.
It will be clear from Chapter 4 that we consider regulation of corporate governance to be prominent in a good corporate governance model. This chapter builds upon that model by focusing on the regulation of corporate governance in particular. It deals specifically with the various mechanisms, legislative and non-legislative, which regulate the corporation and which set in place, collectively, a framework by which good governance can be achieved. Overall, this collective body of mechanisms forms part of what has recently been described as an emerging ‘law of corporate governance’. The regulation of corporate governance in Australia is achieved through binding and non-binding rules, international recommendations and industry-specific standards, the commentaries of scholars and practitioners, and the decisions of judges. The legislature acts to facilitate the achievement of good corporate governance directly by refining corporate law, and indirectly through the entire panoply of rules and regulations which have an impact on the corporation and its activities. There are other agencies that also assume a role in the regulation of corporate governance.
Chapter 9 moves further forward into considering students’ futures, specifically linguistically diverse students, and how teachers can support the development of ‘futures thinking’ for many contexts.
Australia has a long tradition of shareholder activism. What has changed in recent years is the nature of the shareholders who are taking activist positions. Institutional investors have always exercised some measure of influence over the management of large public corporations, but recent developments in shareholder activism have brought these manoeuvres into the public spotlight. Australia’s corporate landscape has featured a range of high-profile boardroom battles with activist investors. This chapter explores the nature and scope of shareholder activism in Australia (including reference to international developments) and its implications for corporate governance.
Oscillations between members of flavoured, electrically neutral meson pairs and the CP violation are phenomena strictly connected with the mixing. However, CP is more general, having been observed also in the decay of charged mesons.
CP violation was first observed in the neutral K system. We see the states of definite strangeness, those of definite CP and those with definite mass and lifetime. The oscillation between the former states, the mathematical expressions and the experimental evidence.
The oscillations and CP violation in the B0 system, and the beautiful experimental results obtained at dedicated high-luminosity electron–positron colliders, the ‘beauty factories’. Beauty physics at the dedicated experiment LHCb at LHC, in particular for the B0, that is not accessible to beauty factories. Examples of CP violation in B0. The recent discovery of CP violation in the charm sector.
How the many different measurements can be put together to test the SM with the unitary triangle.
Neutrinos are the most difficult particle to study, because they interact only via weak interactions. However, they have given revolutionary surprises, and it is with neutrinos that physics beyond the SM has been discovered. In the SM, neutrino masses are rigorously zero, but experiments show that they do have a mass. In the SM, neutrino flavour eigenstates are mass eigenstates; experiments show that they are mixtures of them. Two discoveries proved this. One is neutrino oscillations, discovered in atmospheric neutrinos, the other is the adiabatic flavour conversion in matter, discovered in solar neutrinos.
These were with natural neutrinos. Several experiments have been, and are being, performed with artificial neutrinos from reactors or accelerators to measure with increasing accuracy the neutrino mixing matrix and the mass spectrum. We found that the neutrino mixing is much larger than that of the quarks. Nobody knows why.
The SM assumes neutrinos to be different from antineutrinos, but no experimental proof of it exists. Neutrinos and antineutrinos may well be the same particle, a Majorana spinor. We see how this is searched for by looking for the extremely rare double beta decay.
This chapter focuses on the areas of Humanities and Social Sciences (HASS), Health and Physical Education, Science, Technologies and Languages and we approach these areas using the critical framework of the Ten Teacher Questions. We hope that you may revisit Chapter 6 to refresh your understanding of the ACARA Cross-curriculum Priorities, and as you progress into the Teaching Ideas of this chapter.
The weak interaction was proposed by Fermi in 1933, to interpret the beta decay. The interaction Lagrangian is the product of two charged currents (CC) – one of the nucleons, one of the leptons. It was later discovered that parity and charge conjugation are not conserved and that the structure of the charged currents is a combination of vector and axial currents, V–A. The beautiful Goldhaber experiment on the helicity of the neutrino.
The coupling of all leptons is universal, but not that of the quarks. To obtain universality, Cabibbo introduced the concept of mixing of the hadronic currents, namely of quarks. Then the Glashow–Iliopoulos–Maiani mechanism solved a problem introducing the hypothesis that a fourth quark would exist, the charm, completing a doublet with the strange one. With the discovery of two more quarks, the quark mixing matrix contains a phase factor that is the origin of CP violation in the Standard Model.
The weak neutral currents were discovered with the Gargamelle bubble chamber at CERN in 1973. This showed a close similarity between weak and electromagnetic interactions and opened the way to their unification.
Welcome to this book. We welcome local and international readers in both rural and urban contexts. This book is about linguistic diversity in schools and how teachers can harness multilingual resources and diverse worldviews to promote the wellbeing and achievement of all students.
Throughout the book we present examples of effective practice in classrooms around Australia, ranging from Menindee (New South Wales) to Yarrabah State School (Queensland), from Kalgoorlie (Western Australia) to the Eyre Peninsula (South Australia) and from Mallacoota (Victoria) to Tennant Creek (Northern Territory). The principles and pedagogies promoted here will also apply to multilingual classrooms and communities globally. In Australia or elsewhere, you may be training to become a teacher, or may be a graduated teacher wishing to expand your skills. Our goal is that this book will shape new ideas and perspectives on teaching practice within all schools.