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91 tulosta hakusanalla Manabu Moritsu

Search for the Pentaquark T+ via the p-p ? K-X Reaction at J-PARC

Search for the Pentaquark T+ via the p-p ? K-X Reaction at J-PARC

Manabu Moritsu

Springer Verlag, Singapore
2016
sidottu
This theses reports on an experimental search for an exotic hadron, T+(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 T+ was strongly constrained. The T+ pentaquark was searched for via the p- 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 T+. 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- p ? K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 µb/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 T+ was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the T+ spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of T+ was strongly constrained and is doubtful.
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Search for the Pentaquark T+ via the p-p ? K-X Reaction at J-PARC

Search for the Pentaquark T+ via the p-p ? K-X Reaction at J-PARC

Manabu Moritsu

Springer Verlag, Singapore
2018
nidottu
This theses reports on an experimental search for an exotic hadron, T+(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 T+ was strongly constrained. The T+ pentaquark was searched for via the p- 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 T+. 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- p ? K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 µb/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 T+ was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the T+ spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of T+ was strongly constrained and is doubtful.
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Low-Dose Radiation Effects on Animals and Ecosystems

Low-Dose Radiation Effects on Animals and Ecosystems

Manabu Fukumoto

Saint Philip Street Press
2020
pokkari
This open access book summarizes the latest scientific findings regarding the biological effects of the Fukushima Daiichi Nuclear Power Plant (FNPP) accident in 2011. Various cases of changes in animals and organisms have been reported since the FNPP accident. However, it is often unknown whether they are actually due to radiation, since the dose or dose-rate are not necessarily associated with the changes observed. This book brings together the works of radiation biologists and ecologists to provide reliable radioecology data and gives insight into future radioprotection. The book examines the environmental pollution and radiation exposure, and contains valuable data from abandoned livestock in the ex-evacuation zone and from wild animals including invertebrates and vertebrates, aqueous and terrestrial animals, and plants that are subjected to long-term exposure in the area still affected by radiation. It also analyzes dose evaluation, and offers new perspectives gained from the accident, as well as an overview for future studies to promote radioprotection of humans and the ecosystem. Since the biological impact of radiation is influenced by various factors, it is difficult to scientifically define the effects of low-dose/low-dose-rate radiation. However, the detailed research data presented can be combined with the latest scientific and technological advances, such as artificial intelligence, to provide new insights in the future. This book is a unique and valuable resource for researchers, professionals and anyone interested in the impact of exposure to radiation or contamination with radioactive materials. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
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Low-Dose Radiation Effects on Animals and Ecosystems

Low-Dose Radiation Effects on Animals and Ecosystems

Manabu Fukumoto

Saint Philip Street Press
2020
sidottu
This open access book summarizes the latest scientific findings regarding the biological effects of the Fukushima Daiichi Nuclear Power Plant (FNPP) accident in 2011. Various cases of changes in animals and organisms have been reported since the FNPP accident. However, it is often unknown whether they are actually due to radiation, since the dose or dose-rate are not necessarily associated with the changes observed. This book brings together the works of radiation biologists and ecologists to provide reliable radioecology data and gives insight into future radioprotection. The book examines the environmental pollution and radiation exposure, and contains valuable data from abandoned livestock in the ex-evacuation zone and from wild animals including invertebrates and vertebrates, aqueous and terrestrial animals, and plants that are subjected to long-term exposure in the area still affected by radiation. It also analyzes dose evaluation, and offers new perspectives gained from the accident, as well as an overview for future studies to promote radioprotection of humans and the ecosystem. Since the biological impact of radiation is influenced by various factors, it is difficult to scientifically define the effects of low-dose/low-dose-rate radiation. However, the detailed research data presented can be combined with the latest scientific and technological advances, such as artificial intelligence, to provide new insights in the future. This book is a unique and valuable resource for researchers, professionals and anyone interested in the impact of exposure to radiation or contamination with radioactive materials. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
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The Phantom of a Polarized America

The Phantom of a Polarized America

Manabu Saeki

State University of New York Press
2016
sidottu
Indicates how the rightward shift in the ideology of House Republicans has been mistaken for a broader "polarization" of both parties as well as voters.There is a widespread belief that American politics is becoming more polarized, in the sense that the Republican Party and electorate are becoming more conservative while the Democratic Party and electorate are becoming more liberal. But is this truly the case? The Phantom of a Polarized America places widely held scholarly assumptions about the "polarization" of American politics under the microscope and tests them to determine their veracity. In the case of Congress, Manabu Saeki reveals that contrary to popular beliefs, polarization is largely due to the rightward shift of Republican legislators without any corresponding leftward shift by Democratic legislators. The conservative shift of House Republican ideology has produced a rightward shift of Republican voters, and conservative voters in the Democratic Party have switched to the Republican Party, resulting in a more liberal Democratic Party overall. Saeki concludes that the so-called "polarization" of American politics is largely a phantom being; in truth, it is a neo-conservative movement led by House Republicans.
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The Phantom of a Polarized America

The Phantom of a Polarized America

Manabu Saeki

State University of New York Press
2017
pokkari
Indicates how the rightward shift in the ideology of House Republicans has been mistaken for a broader "polarization" of both parties as well as voters.There is a widespread belief that American politics is becoming more polarized, in the sense that the Republican Party and electorate are becoming more conservative while the Democratic Party and electorate are becoming more liberal. But is this truly the case? The Phantom of a Polarized America places widely held scholarly assumptions about the "polarization" of American politics under the microscope and tests them to determine their veracity. In the case of Congress, Manabu Saeki reveals that contrary to popular beliefs, polarization is largely due to the rightward shift of Republican legislators without any corresponding leftward shift by Democratic legislators. The conservative shift of House Republican ideology has produced a rightward shift of Republican voters, and conservative voters in the Democratic Party have switched to the Republican Party, resulting in a more liberal Democratic Party overall. Saeki concludes that the so-called "polarization" of American politics is largely a phantom being; in truth, it is a neo-conservative movement led by House Republicans.
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Modeling Multiphase Materials Processes

Modeling Multiphase Materials Processes

Manabu Iguchi; Olusegun J. Ilegbusi

Springer-Verlag New York Inc.
2010
sidottu
Modeling Multiphase Materials Processes: Gas-Liquid Systems describes the methodology and application of physical and mathematical modeling to multi-phase flow phenomena in materials processing. The book focuses on systems involving gas-liquid interaction, the most prevalent in current metallurgical processes. The performance characteristics of these processes are largely dependent on transport phenomena. This volume covers the inherent characteristics that complicate the modeling of transport phenomena in such systems, including complex multiphase structure, intense turbulence, opacity of fluid, high temperature, coupled heat and mass transfer, chemical reactions in some cases, and poor wettability of the reactor walls. Also discussed are: solutions based on experimental and numerical modeling of bubbling jet systems, recent advances in the modeling of nanoscale multi-phase phenomena and multiphase flows in micro-scale and nano-scale channels and reactors.Modeling Multiphase Materials Processes: Gas-Liquid Systems will prove a valuable reference for researchers and engineers working in mathematical modeling and materials processing.
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Modeling Multiphase Materials Processes

Modeling Multiphase Materials Processes

Manabu Iguchi; Olusegun J. Ilegbusi

Springer-Verlag New York Inc.
2014
nidottu
Modeling Multiphase Materials Processes: Gas-Liquid Systems describes the methodology and application of physical and mathematical modeling to multi-phase flow phenomena in materials processing. The book focuses on systems involving gas-liquid interaction, the most prevalent in current metallurgical processes. The performance characteristics of these processes are largely dependent on transport phenomena. This volume covers the inherent characteristics that complicate the modeling of transport phenomena in such systems, including complex multiphase structure, intense turbulence, opacity of fluid, high temperature, coupled heat and mass transfer, chemical reactions in some cases, and poor wettability of the reactor walls. Also discussed are: solutions based on experimental and numerical modeling of bubbling jet systems, recent advances in the modeling of nanoscale multi-phase phenomena and multiphase flows in micro-scale and nano-scale channels and reactors.Modeling Multiphase Materials Processes: Gas-Liquid Systems will prove a valuable reference for researchers and engineers working in mathematical modeling and materials processing.
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Basic Transport Phenomena in Materials Engineering

Basic Transport Phenomena in Materials Engineering

Manabu Iguchi; Olusegun J. Ilegbusi

Springer Verlag, Japan
2013
sidottu
This book presents the basic theory and experimental techniques of transport phenomena in materials processing operations. Such fundamental knowledge is highly useful for researchers and engineers in the field to improve the efficiency of conventional processes or develop novel technology. Divided into four parts, the book comprises 11 chapters describing the principles of momentum transfer, heat transfer, and mass transfer in single phase and multiphase systems. Each chapter includes examples with solutions and exercises to facilitate students’ learning. Diagnostic problems are also provided at the end of each part to assess students’ comprehension of the material. The book is aimed primarily at students in materials science and engineering. However, it can also serve as a useful reference text in chemical engineering as well as an introductory transport phenomena text in mechanical engineering. In addition, researchers and engineers engaged in materials processing operations will find the material useful for the design of experiments and mathematical models in transport phenomena. This volume contains unique features not usually found in traditional transport phenomena texts. It integrates experimental techniques and theory, both of which are required to adequately solve the inherently complex problems in materials processing operations. It takes a holistic approach by considering both single and multiphase systems, augmented with specific practical examples. There is a discussion of flow and heat transfer in microscale systems, which is relevant to the design of modern processes such as fuel cells and compact heat exchangers. Also described are auxiliary relationships including turbulence modeling, interfacial phenomena, rheology, and particulate systems, which are critical to many materials processing operations.
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Basic Transport Phenomena in Materials Engineering

Basic Transport Phenomena in Materials Engineering

Manabu Iguchi; Olusegun J. Ilegbusi

Springer Verlag, Japan
2016
nidottu
This book presents the basic theory and experimental techniques of transport phenomena in materials processing operations. Such fundamental knowledge is highly useful for researchers and engineers in the field to improve the efficiency of conventional processes or develop novel technology. Divided into four parts, the book comprises 11 chapters describing the principles of momentum transfer, heat transfer, and mass transfer in single phase and multiphase systems. Each chapter includes examples with solutions and exercises to facilitate students’ learning. Diagnostic problems are also provided at the end of each part to assess students’ comprehension of the material. The book is aimed primarily at students in materials science and engineering. However, it can also serve as a useful reference text in chemical engineering as well as an introductory transport phenomena text in mechanical engineering. In addition, researchers and engineers engaged in materials processing operations will find the material useful for the design of experiments and mathematical models in transport phenomena. This volume contains unique features not usually found in traditional transport phenomena texts. It integrates experimental techniques and theory, both of which are required to adequately solve the inherently complex problems in materials processing operations. It takes a holistic approach by considering both single and multiphase systems, augmented with specific practical examples. There is a discussion of flow and heat transfer in microscale systems, which is relevant to the design of modern processes such as fuel cells and compact heat exchangers. Also described are auxiliary relationships including turbulence modeling, interfacial phenomena, rheology, and particulate systems, which are critical to many materials processing operations.
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Dynamics of Wetting

Dynamics of Wetting

Katoh Kenji; Iguchi Manabu; Takahiro Ito; Wakimoto Tatsuro; Ueda Yoshiaki

Springer Verlag, Japan
2022
sidottu
The wetting dynamics form the foundation to analyze various problems including solid-liquid interfacial behavior, such as dynamics of bubble, droplet or liquid film on a wall. This book introduces some essential concepts of wetting and offers comprehensive treatments to analyze modern engineering topics observed in various industrial fields. In the part of fundamental principle, some basic ideas of interfacial tensions and contact angles are explained mainly from a dynamic viewpoint. The book also introduces some new methods to measure surface tension as well as for advancing and receding contact angles, and briefly touches on the basic principle of controling the wettability of a solid plates. either a or s, not both! In the part of application, some real-world problems related to wetting phenomena are discussed in detail. Based on the physical mechanism of contact angle hysteresis, sliding of droplets on inclined plates or on a vertical cylinder and detachment of pendant droplet from a curved surface are analyzed from a thermodynamic viewpoint based on the energy minimum principle. In recent progressing industrial techniques such as lab-on-a-tip or microfluidics, it is important to understand the dynamic wetting phenomenon in which contact angles are dependent on the velocity of three-phase contact line. The authors present a wide variety of experimental and MD results for dynamic contact angles appeared in capillary tubes or two-dimensional meniscus on a moving plate. The dynamics of wetting is discussed from theoretical and numerical results with the concept of Navier’s slip condition on the wall. The book also introduces some important applicative topics in handling ink jet devices or surfactant solutions, such as a CFD model to appropriately express the force balance on the contact line, the effect of surface viscosity or dynamic surface tension on the stability of surfactant liquid sheet or droplet, and some unique wetting phenomena observed in steel manufacturing process.
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