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Books > Science & Mathematics > Science: general issues > Scientific standards

Advances in Gamma Ray Resonant Scattering and Absorption - Long-Lived Isomeric Nuclear States (Hardcover, 2015 ed.): Andrey V.... Advances in Gamma Ray Resonant Scattering and Absorption - Long-Lived Isomeric Nuclear States (Hardcover, 2015 ed.)
Andrey V. Davydov
R4,972 Discovery Miles 49 720 Ships in 12 - 17 working days

This book presents the basics and advanced topics of research of gamma ray physics. It describes measuring of Fermi surfaces with gamma resonance spectroscopy and the theory of angular distributions of resonantly scattered gamma rays. The dependence of excited-nuclei average lifetime on the shape of the exciting-radiation spectrum and electron binding energies in the spectra of scattered gamma rays is described. Resonant excitation by gamma rays of nuclear isomeric states with long lifetime leads to the emission and absorption lines. In the book, a new gamma spectroscopic method, gravitational gamma spectrometry, is developed. It has a resolution hundred million times higher than the usual Moessbauer spectrometer. Another important topic of this book is resonant scattering of annihilation quanta by nuclei with excited states in connection with positron annihilation. The application of the methods described is to explain the phenomenon of Coulomb fragmentation of gamma-source molecules and resonant scattering of annihilation quanta to study the shape of Fermi surfaces of metals.

Schur-Convex Functions and Inequalities - Volume 1: Concepts, Properties, and Applications in Symmetric Function Inequalities... Schur-Convex Functions and Inequalities - Volume 1: Concepts, Properties, and Applications in Symmetric Function Inequalities (Hardcover)
Huan-nan Shi; Contributions by Harbin Institute of Technology
R4,729 Discovery Miles 47 290 Ships in 12 - 17 working days

This two-volume work introduces the theory and applications of Schur-convex functions. The first volume introduces concepts and properties of Schur-convex functions, including Schur-geometrically convex functions, Schur-harmonically convex functions, Schur-power convex functions, etc. and also discusses applications of Schur-convex functions in symmetric function inequalities.

Space-Time Reference Systems (Hardcover, 2013 ed.): Michael Soffel, Ralf Langhans Space-Time Reference Systems (Hardcover, 2013 ed.)
Michael Soffel, Ralf Langhans
R3,776 R2,142 Discovery Miles 21 420 Save R1,634 (43%) Ships in 12 - 17 working days

The high accuracy of modern astronomical spatial-temporal reference systems has made them considerably complex. This book offers a comprehensive overview of such systems. It begins with a discussion of 'The Problem of Time', including recent developments in the art of clock making (e.g., optical clocks) and various time scales. The authors address the definitions and realization of spatial coordinates by reference to remote celestial objects such as quasars. After an extensive treatment of classical equinox-based coordinates, new paradigms for setting up a celestial reference system are introduced that no longer refer to the translational and rotational motion of the Earth. The role of relativity in the definition and realization of such systems is clarified. The topics presented in this book are complemented by exercises (with solutions). The authors offer a series of files, written in Maple, a standard computer algebra system, to help readers get a feel for the various models and orders of magnitude. Beyond astrometry, the main fields of application of high-precision astronomical spatial-temporal reference systems and frames are navigation (GPS, interplanetary spacecraft navigation) and global geodynamics, which provide a high-precision Celestial Reference System and its link to any terrestrial spatial-temporal reference system. Mankind's urgent environmental questions can only be answered in the context of appropriate reference systems in which both aspects, space and time, are realized with a sufficiently high level of accuracy. This book addresses all those interested in high-precision reference systems and the various techniques (GPS, Very Long Baseline Interferometry, Satellite Laser Ranging, Lunar Laser Ranging) necessary for their realization, including the production and dissemination of time signals.

Acoustical Imaging - Volume 26 (Hardcover, 2002 ed.): Roman Gr. Maev Acoustical Imaging - Volume 26 (Hardcover, 2002 ed.)
Roman Gr. Maev
R6,078 R4,843 Discovery Miles 48 430 Save R1,235 (20%) Ships in 12 - 17 working days

This book constitutes the Proceedings of the 26th Symposium on Acoustical Imaging held inWindsor, Ontario, Canada during September 9-12, 2001. This traditional scientific event is recognized as a premier forum for the presentation of advanced research results in both theoretical and experimental development. The lAIS was conceived at a 1967Acoustical Holography meeting in the USA. Since then, these traditional symposia provide an opportunity for specialists who are working in this area to make new acquaintances, renew old friendships and present recent results of their research. Our Symposium has grown significantly in size due to a broad interest in various topics and to the quality of the presentations. For the firsttime in 40 years, the IAIS was held in the province of Ontario in Windsor, Canada's Automotive Capital and City of Roses. The 26th IAIS attracted over 100specialists from 13countries representing this interdisciplinary field in physical acoustics, image processing, applied mathematics, solid-state physics, biology and medicine, industrial applications and quality control technologies. The 26th lAIS was organized in the traditional way with only one addition-a Special Session "History of Acoustical Imaging" with the involvement of such well known scientists as Andrew Briggs, Noriyoshi Chubachi, Robert Green Jr., Joie Jones, Kenneth Erikson, and Bernhard Tittmann. Many of these speakers are well known scientists in their fields and we would like to thank them for making this session extremely successful.

Measurements of the X c and X b Quarkonium States in pp Collisions with the ATLAS Experiment (Hardcover, 1st ed. 2015): Andrew... Measurements of the X c and X b Quarkonium States in pp Collisions with the ATLAS Experiment (Hardcover, 1st ed. 2015)
Andrew Chisholm
R3,567 Discovery Miles 35 670 Ships in 12 - 17 working days

This thesis, which won one of the six 2015 ATLAS Thesis Awards, concerns the study of the charmonium and bottomonium bound heavy quark bound states. The first section of the thesis describes the observation of a candidate for the chi_b(3P) bottomonium states. This represented the first observation of a new particle at the LHC and its existence was subsequently confirmed by D0 and LHCb experiments. The second part of the thesis presents measurements of the prompt and non-prompt production of the chi_c1 and chi_c2 charmonium states in proton-proton collisions. These measurements are compared to several theoretical predictions and can be used to inform the development of theoretical models of quarkonium production.

Cyber-Physical Systems and Metrology 4.0 (Hardcover): Svyatoslav Yatsyshyn, Bogdan Stadnyk Cyber-Physical Systems and Metrology 4.0 (Hardcover)
Svyatoslav Yatsyshyn, Bogdan Stadnyk
R2,600 R2,415 Discovery Miles 24 150 Save R185 (7%) Ships in 9 - 15 working days
Pixel Detectors - From Fundamentals to Applications (Hardcover, 2006 ed.): Leonardo Rossi, Peter Fischer, Tilman Rohe, Norbert... Pixel Detectors - From Fundamentals to Applications (Hardcover, 2006 ed.)
Leonardo Rossi, Peter Fischer, Tilman Rohe, Norbert Wermes
R3,210 Discovery Miles 32 100 Ships in 10 - 15 working days

Pixel detectors are a particularly important class of particle and radiation detection devices. They have an extremely broad spectrum of applications, ranging from high-energy physics to the photo cameras of everyday life. This book is a general purpose introduction into the fundamental principles of pixel detector technology and semiconductor-based hybrid pixel devices. Although these devices were developed for high-energy ionizing particles and radiation beyond visible light, they are finding new applications in many other areas. This book will therefore benefit all scientists and engineers working in any laboratory involved in developing or using particle detection.

Accelerator Technology - Applications in Science, Medicine, and Industry (Hardcover, 1st ed. 2020): Soeren Moeller Accelerator Technology - Applications in Science, Medicine, and Industry (Hardcover, 1st ed. 2020)
Soeren Moeller
R5,389 Discovery Miles 53 890 Ships in 12 - 17 working days

This book explores the physics, technology and applications of particle accelerators. It illustrates the interconnections between applications and basic physical principles, enabling readers to better understand current and upcoming technologies and see beyond the paradigmatic borders of the individual fields. The reader will discover why accelerators are no longer just toys for scientists, but have also become modern and efficient nuclear workhorses. The book starts with an introduction to the relevant technologies and radiation safety aspects of accelerating electrons and ions from several keV to roughly 250 MeV. It subsequently describes the physics behind the interactions of these particle beams with matter. Mathematical descriptions and state-of-the-art computer models of energy-loss and nuclear interactions between the particle beams and targets round out the physics coverage. On this basis, the book then presents the most important accelerator applications in science, medicine, and industry, explaining and comparing more than 20 major application fields, encompassing semiconductors, cancer treatment, and space exploration. Despite the disparate fields involved, this book demonstrates how the same essential technology and physics connects all of these applications.

Biographies in the History of Physics - Actors, Objects, Institutions (Hardcover, 1st ed. 2020): Christian Forstner, Mark Walker Biographies in the History of Physics - Actors, Objects, Institutions (Hardcover, 1st ed. 2020)
Christian Forstner, Mark Walker
R5,382 Discovery Miles 53 820 Ships in 12 - 17 working days

This book sheds new light on the biographical approach in the history of physics by including the biographies of scientific objects, institutions, and concepts. What is a biography? Can biographies also be written for non-human subjects like scientific instruments, institutions or concepts? The respective chapters of this book discuss these controversial questions using examples from the history of physics. By approaching biography as metaphor, it transcends the boundaries between various perspectives on the history of physics, and enriches our grasp of the past.

Particle Accelerator Physics (Hardcover, 4th ed. 2015): Helmut Wiedemann Particle Accelerator Physics (Hardcover, 4th ed. 2015)
Helmut Wiedemann
R2,730 Discovery Miles 27 300 Ships in 12 - 17 working days

This book by Helmut Wiedemann is a well-established, classic text, providing an in-depth and comprehensive introduction to the field of high-energy particle acceleration and beam dynamics. The present 4th edition has been significantly revised, updated and expanded. The newly conceived Part I is an elementary introduction to the subject matter for undergraduate students. Part II gathers the basic tools in preparation of a more advanced treatment, summarizing the essentials of electrostatics and electrodynamics as well as of particle dynamics in electromagnetic fields. Part III is an extensive primer in beam dynamics, followed, in Part IV, by an introduction and description of the main beam parameters and including a new chapter on beam emittance and lattice design. Part V is devoted to the treatment of perturbations in beam dynamics. Part VI then discusses the details of charged particle acceleration. Parts VII and VIII introduce the more advanced topics of coupled beam dynamics and describe very intense beams - a number of additional beam instabilities are introduced and reviewed in this new edition. Part IX is an exhaustive treatment of radiation from accelerated charges and introduces important sources of coherent radiation such as synchrotrons and free-electron lasers. The appendices at the end of the book gather useful mathematical and physical formulae, parameters and units. Solutions to many end-of-chapter problems are given. This textbook is suitable for an intensive two-semester course starting at the senior undergraduate level.

The Lunar Atmosphere and Dust Environment Explorer Mission (LADEE) (Hardcover, 2015 ed.): Richard C Elphic, Christopher T.... The Lunar Atmosphere and Dust Environment Explorer Mission (LADEE) (Hardcover, 2015 ed.)
Richard C Elphic, Christopher T. Russell
R3,512 Discovery Miles 35 120 Ships in 12 - 17 working days

This volume contains five articles describing the mission and its instruments. The first paper, by the project scientist Richard C. Elphic and his colleagues, describes the mission objectives, the launch vehicle, spacecraft and the mission itself. This is followed by a description of LADEE's Neutral Mass Spectrometer by Paul Mahaffy and company. This paper describes the investigation that directly targets the lunar exosphere, which can also be explored optically in the ultraviolet. In the following article Anthony Colaprete describes LADEE's Ultraviolet and Visible Spectrometer that operated from 230 nm to 810 nm scanning the atmosphere just above the surface. Not only is there atmosphere but there is also dust that putatively can be levitated above the surface, possibly by electric fields on the Moon's surface. Mihaly Horanyi leads this investigation, called the Lunar Dust Experiment, aimed at understanding the purported observations of levitated dust. This experiment was also very successful, but in this case their discovery was not the electrostatic levitation of dust, but that the dust was raised by meteoroid impacts. This is not what had been expected but clearly is the explanation that best fits the data. Originally published in Space Science Reviews, Volume 185, Issue 1-4, 2014.

Jet Quenching in Relativistic Heavy Ion Collisions at the LHC (Hardcover, 2014 ed.): Aaron Angerami Jet Quenching in Relativistic Heavy Ion Collisions at the LHC (Hardcover, 2014 ed.)
Aaron Angerami
R4,136 R3,553 Discovery Miles 35 530 Save R583 (14%) Ships in 12 - 17 working days

This thesis presents the first measurements of jets in relativistic heavy ion collisions as reported by the ATLAS Collaboration. These include the first direct observation of jet quenching through the observation of a centrality-dependent dijet asymmetry. Also, a series of jet suppression measurements are presented, which provide quantitative constraints on theoretical models of jet quenching. These results follow a detailed introduction to heavy ion physics with emphasis on the phenomenon of jet quenching and a comprehensive description of the ATLAS detector and its capabilities with regard to performing these measurements.

Encyclopaedia of Historical Metrology, Weights, and Measures - Volume 3 (Hardcover, 1st ed. 2018): Jan Gyllenbok Encyclopaedia of Historical Metrology, Weights, and Measures - Volume 3 (Hardcover, 1st ed. 2018)
Jan Gyllenbok
R5,482 Discovery Miles 54 820 Ships in 12 - 17 working days

This third volume of Gyllenbok's encyclopaedia of historical metrology comprises the second part of the compendium of measurement systems and currencies of all sovereign states of the modern World (J-Z). Units of measurement are of vital importance in every civilization through history. Since the early ages, man has through necessity devised various measures to assist him in everyday life. They have enabled and continue to enable us to trade in commonly and equitably understood amounts, and to investigate, understand, and control the chemical, physical, and biological processes of the natural world. The encyclopeadia will be of use not only to historians of science and technology, but also to economic and social historians and should be in every major academic and national library as standard reference work on the topic.

Plug In Electric Vehicles in Smart Grids - Charging Strategies (Hardcover, 2015 ed.): Sumedha Rajakaruna, Farhad Shahnia,... Plug In Electric Vehicles in Smart Grids - Charging Strategies (Hardcover, 2015 ed.)
Sumedha Rajakaruna, Farhad Shahnia, Arindam Ghosh
R4,016 R3,726 Discovery Miles 37 260 Save R290 (7%) Ships in 12 - 17 working days

This book covers the recent research advancements in the area of charging strategies that can be employed to accommodate the anticipated high deployment of Plug-in Electric Vehicles (PEVs) in smart grids. Recent literature has focused on various potential issues of uncoordinated charging of PEVs and methods of overcoming such challenges. After an introduction to charging coordination paradigms of PEVs, this book will present various ways the coordinated control can be accomplished. These innovative approaches include hierarchical coordinated control, model predictive control, optimal control strategies to minimize load variance, smart PEV load management based on load forecasting, integrating renewable energy sources such as photovoltaic arrays to supplement grid power, using wireless communication networks to coordinate the charging load of a smart grid and using market price of electricity and customers payment to coordinate the charging load. Hence, this book proposes many new strategies proposed recently by the researchers around the world to address the issues related to coordination of charging load of PEVs in a future smart grid.

Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission (Hardcover, 2013 ed.): Takayuki Yuasa Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission (Hardcover, 2013 ed.)
Takayuki Yuasa
R3,824 R3,535 Discovery Miles 35 350 Save R289 (8%) Ships in 12 - 17 working days

This thesis presents a study of the origin of an apparently extended X-ray emission associated with the Galactic ridge. The study was carried out with broadband spectra obtained from mapping observations in the Galactic bulge region conducted in 2005-2010 by the Suzaku space X-ray observatory. The spectra were analyzed with a newly constructed X-ray spectral model of an accreting white dwarf binary that is one of the proposed candidate stars for the origin of the Galactic ridge emission in the higher energy band. Fitting of the observed Galactic ridge spectra with the model showed that there is another spectral component that fills the gap between the observed X-ray flux and the component expected from the accreting white dwarf spectral model in the lower energy band. This additional soft spectral component was nicely explained by an X-ray spectral model of normal stars. The result, together with previously reported high-resolution imaging results, strongly supports the idea that the Galactic ridge X-ray emission is an assembly of dim, discrete X-ray point sources.

Radar and Radionavigation - Pre-professional Training for Aviation Radio Specialists (Hardcover, 1st ed. 2022): Anatoly... Radar and Radionavigation - Pre-professional Training for Aviation Radio Specialists (Hardcover, 1st ed. 2022)
Anatoly Ivanovich Kozlov, Yuri Grigoryevich Shatrakov, Dmitry Alexandrovich Zatuchny
R3,004 Discovery Miles 30 040 Ships in 10 - 15 working days

This book highlights the capabilities and limitations of radar and air navigation. It discusses issues related to the physical principles of an electromagnetic field, the structure of radar information, and ways to transmit it. Attention is paid to the classification of radio waves used for transmitting radar information, as well as to the physical description of their propagation media. The third part of the book addresses issues related to the current state of navigation systems used in civil aviation and the prospects for their development in the future, as well as the history of satellite radio navigation systems. The book may be useful for schoolchildren, interested in the problems of radar and air navigation.

Robust Control for Grid Voltage Stability: High Penetration of Renewable Energy - Interfacing Conventional and Renewable Power... Robust Control for Grid Voltage Stability: High Penetration of Renewable Energy - Interfacing Conventional and Renewable Power Generation Resources (Hardcover, 2014 ed.)
Jahangir Hossain, Hemanshu Roy Pota
R3,064 Discovery Miles 30 640 Ships in 10 - 15 working days

This book makes the area of integration of renewable energy into the existing electricity grid accessible to engineers and researchers. This is a self-contained text which has models of power system devices and control theory necessary to understand and tune controllers in use currently. The new research in renewable energy integration is put into perspective by comparing the change in the system dynamics as compared to the traditional electricity grid. The emergence of the voltage stability problem is motivated by extensive examples. Various methods to mitigate this problem are discussed bringing out their merits clearly. As a solution to the voltage stability problem, the book covers the use of FACTS devices and basic control methods. An important contribution of this book is to introduce advanced control methods for voltage stability. It covers the application of output feedback methods with a special emphasis on how to bound modelling uncertainties and the use of robust control theory to design controllers for practical power systems. Special emphasis is given to designing controllers for FACTS devices to improve low-voltage ride-through capability of induction generators. As generally PV is connected in low voltage distribution area, this book also provides a systematic control design for the PV unit in distribution systems. The theory is amply illustrated with large IEEE Test systems with multiple generators and dynamic load. Controllers are designed using Matlab and tested using full system models in PSSE.

Evaluating Measurement Accuracy - A Practical Approach (Hardcover, 2nd ed. 2013): Semyon G. Rabinovich Evaluating Measurement Accuracy - A Practical Approach (Hardcover, 2nd ed. 2013)
Semyon G. Rabinovich
R4,060 R3,726 Discovery Miles 37 260 Save R334 (8%) Ships in 12 - 17 working days

"Evaluating Measurement Accuracy, 2nd Edition" is intended for those who are concerned with measurements in any field of science or technology. It reflects the latest developments in metrology and offers new results, but is designed to be accessible to readers at different levels: scientists who advance the field of metrology, engineers and experimental scientists who use measurements as tool in their professions, students and graduate students in natural sciences and engineering, and, in parts describing practical recommendations, technicians performing mass measurements in industry, quality control, and trade. This book presents material from the practical perspective and offers solutions and recommendations for problems that arise in conducting real-life measurements. This new edition adds a method for estimating accuracy of indirect measurements with independent arguments, whose development Dr. Rabinovich was able to complete very recently. This method, which is called the Method of Enumeration, produces estimates that are no longer approximate, similar to the way the method of reduction described in the first edition removed approximation in estimating uncertainty of indirect measurements with dependent arguments. The method of enumeration completes addressing the range of problems whose solutions signify the emergence of the new theory of accuracy of measurements. A new method is added for building a composition of histograms, and this method forms a theoretical basis for the method of enumeration.Additionally, as a companion to this book, a concise practical guide that assembles simple step-by-step procedures for typical tasks the practitioners are likely to encounter in measurement accuracy estimation is available at SpringerLink.

Economic Keystones - The Weight System of the Kingdom of Judah (Hardcover): Raz Kletter Economic Keystones - The Weight System of the Kingdom of Judah (Hardcover)
Raz Kletter
R6,758 Discovery Miles 67 580 Ships in 12 - 17 working days

This book presents a full picture of the weight system of Iron Age Judah, based on archaeological finds, historical sources and biblical texts. This book offers a complete picture of the weight system of Iron Age Judah, involving a careful study of the typology, date, context, weight standards, inscription and function of hundreds of weights (with a full catalogue). As against the common view, the author suggests that all the weights belong to one system based on one basic sheqel standard. The weights are mostly not 'royal weights' and have nothing to do with Josiah's reform. The 'sheqel of the sanctuary' was never used in practice in First-Temple Judah. The study leads to new insights about the relation of the Judaean system to other weight systems, as well as about international trade and the economy of the Kingdom of Judah.

Study of Double Parton Scattering Using Four-Jet Scenarios - in Proton-Proton Collisions at sqrt s = 7 TeV with the CMS... Study of Double Parton Scattering Using Four-Jet Scenarios - in Proton-Proton Collisions at sqrt s = 7 TeV with the CMS Experiment at the LHC (Hardcover, 1st ed. 2016)
Paolo Gunnellini
R3,974 R3,684 Discovery Miles 36 840 Save R290 (7%) Ships in 12 - 17 working days

This thesis addresses in a very new and elegant way several measurements and the extraction of so-called double parton scattering. The new and elegant way lies in the combination of measurements and a very smart extraction of double parton scattering results, which is easy to apply and overcomes many of the technical difficulties of older methods. Many new phenomena in particle physics can be observed when particles are collided at the highest energies; one of the highlights in recent years was the discovery of the Higgs boson at the Large Hadron Collider at CERN. Understanding the production mechanism of the Higgs boson at the LHC requires detailed knowledge of the physics of proton-proton collisions. When the density of partons in the protons becomes large, there is a non-negligible probability that more than one parton participates in the interaction and the so-called double parton scattering becomes important. In some cases very particular final state signatures can be observed, which can be regarded as an indication of such double partonic scattering and where the different interactions can be separated. Such multiple partonic interactions play an important role when precise predictions from known processes are required.

The Future of Heritage Science and Technologies - Materials Science (Hardcover, 1st ed. 2022): Rocco Furferi, Rodorico Giorgi,... The Future of Heritage Science and Technologies - Materials Science (Hardcover, 1st ed. 2022)
Rocco Furferi, Rodorico Giorgi, Kate Seymour, Anna Pelagotti
R6,690 Discovery Miles 66 900 Ships in 10 - 15 working days

This book presents selected work from the Florence Heri-Tech, a conference focused on the use of innovative technologies and methods for analyzing, managing, and preserving cultural heritage. This book presents chapters on the chemical and physical advancement in the development of new materials and methods for the conservation and restoration of cultural heritage. It also covers trends in conservation and restoration technology: biotechnology, nanotechnology, tailored materials, and physical technologies. The reader also finds information on methods and instruments for the conservation diagnosis and treatments.

The Science of Time 2016 - Time in Astronomy & Society, Past, Present and Future (Hardcover, 1st ed. 2017): Elisa Felicitas... The Science of Time 2016 - Time in Astronomy & Society, Past, Present and Future (Hardcover, 1st ed. 2017)
Elisa Felicitas Arias, Ludwig Combrinck, Pavel Gabor, Catherine Hohenkerk, P.Kenneth Seidelmann
R7,656 Discovery Miles 76 560 Ships in 12 - 17 working days

The uses of time in astronomy - from pointing telescopes, coordinating and processing observations, predicting ephemerides, cultures, religious practices, history, businesses, determining Earth orientation, analyzing time-series data and in many other ways - represent a broad sample of how time is used throughout human society and in space. Time and its reciprocal, frequency, is the most accurately measurable quantity and often an important path to the frontiers of science. But the future of timekeeping is changing with the development of optical frequency standards and the resulting challenges of distributing time at ever higher precision, with the possibility of timescales based on pulsars, and with the inclusion of higher-order relativistic effects. The definition of the second will likely be changed before the end of this decade, and its realization will increase in accuracy; the definition of the day is no longer obvious. The variability of the Earth's rotation presents challenges of understanding and prediction. In this symposium speakers took a closer look at time in astronomy, other sciences, cultures, and business as a defining element of modern civilization. The symposium aimed to set the stage for future timekeeping standards, infrastructure, and engineering best practices for astronomers and the broader society. At the same time the program was cognizant of the rich history from Harrison's chronometer to today's atomic clocks and pulsar observations. The theoreticians and engineers of time were brought together with the educators and historians of science, enriching the understanding of time among both experts and the public.

Truth and Traceability in Physics and Metrology (Hardcover): Michael Grabe Truth and Traceability in Physics and Metrology (Hardcover)
Michael Grabe
R1,700 Discovery Miles 17 000 Ships in 10 - 15 working days

Metrological data is known to be blurred by the imperfections of the measuring process. In retrospect, for about two centuries regular or constant errors were no focal point of experimental activities, only irregular or random error were. Today's notation of unknown systematic errors is in line with this. Confusingly enough, the worldwide practiced approach to belatedly admit those unknown systematic errors amounts to consider them as being random, too. This book discusses a new error concept dispensing with the common practice to randomize unknown systematic errors. Instead, unknown systematic errors will be treated as what they physically are- namely as constants being unknown with respect to magnitude and sign. The ideas considered in this book issue a proceeding steadily localizing the true values of the measurands and consequently traceability.

Perfect/Complete Scattering Experiments - Probing Quantum Mechanics on Atomic and Molecular Collisions and Coincidences... Perfect/Complete Scattering Experiments - Probing Quantum Mechanics on Atomic and Molecular Collisions and Coincidences (Hardcover, 2013 ed.)
Hans Kleinpoppen, Bernd Lohmann, Alexei N. Grum-Grzhimailo
R4,332 R3,750 Discovery Miles 37 500 Save R582 (13%) Ships in 12 - 17 working days

The main goal of this book is to elucidate what kind of experiment must be performed in order to determine the full set of independent parameters which can be extracted and calculated from theory, where electrons, photons, atoms, ions, molecules, or molecular ions may serve as the interacting constituents of matter. The feasibility of such perfect' and-or `complete' experiments, providing the complete quantum mechanical knowledge of the process, is associated with the enormous potential of modern research techniques, both, in experiment and theory. It is even difficult to overestimate the role of theory in setting of the complete experiment, starting with the fact that an experiment can be complete only within a certain theoretical framework, and ending with the direct prescription of what, and in what conditions should be measured to make the experiment `complete'. The language of the related theory is the language of quantum mechanical amplitudes and their relative phases. This book captures the spirit of research in the direction of the complete experiment in atomic and molecular physics, considering some of the basic quantum processes: scattering, Auger decay and photo-ionization. It includes a description of the experimental methods used to realize, step by step, the complete experiment up to the level of the amplitudes and phases. The corresponding arsenal includes, beyond determining the total cross section, the observation of angle and spin resolved quantities, photon polarization and correlation parameters, measurements applying coincidence techniques, preparing initially polarized targets, and even more sophisticated methods. The `complete' experiment is, until today, hardly to perform. Therefore, much attention is paid to the results of state-of-the-art experiments providing detailed information on the process, and their comparison to the related theoretical approaches, just to mention relativistic multi-configurational Dirac-Fock, convergent close-coupling, Breit-Pauli R-matrix, or relativistic distorted wave approaches, as well as Green's operator methods. This book has been written in honor of Herbert Walther and his major contribution to the field but even to stimulate advanced Bachelor and Master students by demonstrating that obviously nowadays atomic and molecular scattering physics yields and gives a much exciting appreciation for further advancing the field.

Search for the Pentaquark  + via the   p   K X Reaction at J-PARC (Hardcover, 1st ed. 2016): Manabu Moritsu Search for the Pentaquark + via the p K X Reaction at J-PARC (Hardcover, 1st ed. 2016)
Manabu Moritsu
R3,497 Discovery Miles 34 970 Ships in 12 - 17 working days

This theses reports on an experimental search for an exotic hadron, +(1540) pentaquark, which is a genuine exotic hadron with a five-quark system of uuddsbar. The results of this book support that the existence of + was strongly constrained. The + pentaquark was searched for via the - p K- X reaction using a beam momentum of 2.01 GeV/c at the J-PARC hadron experimental facility, taking advantage of high-statistics and high-resolution compared with previous experiments, some of which claimed the evidence of +. In order to realize a good missing-mass resolution of 2 MeV, the beam spectrometer and superconducting kaon spectrometer were constructed. No clear peak was observed in the missing mass spectrum of the - p K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 b/sr at the 90% confidence level in a mass region of 1500-1560 MeV/c2. This upper limit is an order of magnitude smaller than that of the previous KEK experiment. Compared with a theoretical calculation using the effective Lagrangian approach, the decay width of + was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the + spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of + was strongly constrained and is doubtful.

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