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Orbital characters of three-dimensional Fermi surfaces in Eu2−xSrxNiO4 as probed by soft-x-ray angle-resolved photoemission spectroscopy

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Physical review B 2011年第24期84卷 241109(R)-241109(R)页

作者： M. Uchida K. Ishizaka P. Hansmann X. Yang M. Sakano J. Miyawaki r. Arita Y. Kaneko Y. Takata M. Oura A. Toschi K. Held A. Chainani O. K. Andersen S. Shin Y. Tokura Department of Applied Physics University of Tokyo Tokyo 113-8656 Japan Institut for Solid State Physics Vienna University of Technology A-1040 Vienna Austria School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore RIKEN SPring-8 Center Hyogo 679-5148 Japan Multiferroics Project ERATO Japan Science and Technology Agency (JST) Tokyo 113-8656 Japan Max-Planck-Institut für Festkörperforschung D-70569 Stuttgart Germany Institute for Solid State Physics (ISSP) University of Tokyo Chiba 277-8561 Japan Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG) RIKEN Advanced Science Institute (ASI) Wako 351-0198 Japan

The three-dimensional Fermi-surface structure of hole-doped metallic layered nickelate Eu2−xSrxNiO4 (x=1.1), an important counterpart to the isostructural superconducting cuprate La2−xSrxCuO4, is investigated by energy-dependent soft-x-ray angle-resolved photoemission spectroscopy. In addition to a large cylindrical hole Fermi surface analogous to the cuprates, we observe a Γ-centered 3z2−r2-derived small electron pocket. This finding demonstrates that in the layered nickelate the 3z2−r2 band resides close to the x2−y2 one in energy. The resultant multiband feature with varying orbital character as revealed may strongly work against the emergence of the high-temperature superconductivity.

关键词： FErMI surfaces SUPErCONdUCTOrS PHOTOELECTrON spectroscopy SUPErCONdUCTIVITY ENErGY-band theory of solids

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Adding dynamical generators in quantum master equations

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Physical review A 2018年第6期97卷 062124-062124页

作者： Jan Kołodyński Jonatan Bohr Brask Martí Perarnau-Llobet Bogna Bylicka ICFO–Institut de Ciencies Fotoniques Barcelona Institute of Science and Technology 08860 Castelldefels (Barcelona) Spain Group of Applied Physics University of Geneva 1211 Geneva Switzerland Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Strasse 1 D-85748 Garching Germany

The quantum master equation is a widespread approach to describing open quantum system dynamics. In this approach, the effect of the environment on the system evolution is entirely captured by the dynamical generator, providing a compact and versatile description. However, care needs to be taken when several noise processes act simultaneously or the Hamiltonian evolution of the system is modified. Here, we show that generators can be added at the master equation level without compromising physicality only under restrictive conditions. Moreover, even when adding generators results in legitimate dynamics, this does not generally correspond to the true evolution of the system. We establish a general condition under which direct addition of dynamical generators is justified, showing that it is ensured under weak coupling and for settings where the free system Hamiltonian and all system-environment interactions commute. In all other cases, we demonstrate by counterexamples that the exact evolution derived microscopically cannot be guaranteed to coincide with the dynamics naively obtained by adding the generators.

关键词： Open quantum systems Open quantum systems & decoherence Quantum description of light-matter interaction Quantum fluctuations & noise Quantum information architectures & platforms Quantum optics

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refractive index measurements for brown stock washing loss - Mill investigations

Refractive index measurements for brown stock washing loss -...

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63rd Appita Annual Conference and Exhibition - Conference Technical Papers

作者： Kopra, riku Helttunen, Jukka Tervola, Pekka Tirri, Tapio dahl, Olli Mikkeli University of Applied Sciences YTI Research Centre Vipusenkatu 10 FI-57200 Savonlinna Finland R and D Engineer Stora Enso Fine Paper Varkaus Mill P.O. Box 169 Fl-78201 Varkaus Finland Research and Development Scientist Andritz Oy Tammasaarenkatu 1 00180 Helsinki Finland Helsinki University of Technology Department of Forest Product Technology CleanTech Group P.O. Box 6300 FI-02015 TKK Finland

The usability of the refractometer to measure washing loss in chemical pulping was studied under mill conditions. Our earlier study showed that measurement works very well under laboratory conditions. The focus of investigation was on brown stock washing before and after oxygen delignification at a Finnish pulp mill. The E-values for the system were calculated on the grounds of the sample lap. Also, an on-line calculation method for washing effectiveness was generated. In addition, washing filtrates and filtrates which were centrifuged from pulp were analysed and the measuring results of the refractometer, SFS-3008 standard, conductivity and COd-analysis were compared. The measuring results indicated that the refractometer is suitable for measuring the dissolved dry solids of outgoing filtrates and pulp suspensions on a single washer. Therefore it is suitable for monitoring washing loss levels in the brown stock washing and because of this real-time measuring of washing effectiveness is possible.

关键词： Washing

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design and Implementation of Hydraulic-Cable driven Manipulator for disaster response Operation

Design and Implementation of Hydraulic-Cable driven Manipula...

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IEEE International Conference on robotics and Automation (ICrA)

作者： Jungyeong Kim Jaehong Seo Sangshin Park Sangchul Han Jungsan Cho Robotics and Virtual Engineering University of Science and Technology (UST) Daejon South Korea Intelligent Robot Engineering University of Science and Technology (UST) Daejon South Korea Robotics R&D Group Korea Institute of Industrial Technology (KITECH) Ansan South Korea Robotics Industrial Technology University of Science and Technology (UST) Daejon South Korea

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

This paper introduces a new hydraulic manipulator with hydraulic-cable driven actuation (HCA) modules for disaster response mobile-manipulation. The hydraulic actuation system has the potential to apply disaster-response application, because it has a higher power-to-weight ratio and robustness to external impacts than electric motor actuation. However, using a conventional hydraulic manipulators is inappropriate because the revolute joint uses conventional actuators, such as linear cylinders and vanes, which have some limitations: 1) linear cylinder: small range of motion, 2) vane: low torque-toweight ratio. To overcome these limitations, we propose new 3dOF manipulator which has a larger workspace than the conventional hydraulic manipulator and comparable payloadto-weight ratio. To this end, we use hydraulic-cable driven actuation modules from our previous research. Experimental results verify the basic performance of the actuator modules and manipulator and their capability to perform various disaster response tasks.

关键词： Manipulators Blades Actuators Hydraulic systems Torque Wires

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development of a Super-insulating, Aerogel-based Textile Wallpaper for the Indoor Energy retrofit of Existing residential Buildings

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Procedia Engineering 2017年 180卷 1139-1149页

作者： Gabriele Masera Karim Ghazi Wakili Thomas Stahl Samuel Brunner rosanna Galliano Carol Monticelli Stefano Aliprandi Alessandra Zanelli Amr Elesawy Department of Architecture Built Environment and Construction Engineering Politecnico di Milano Milan Italy Empa Materials Science and Technology Dübendorf Switzerland IABP Institute for Applied Building Physics Winterthur Switzerland R&D Fixit Group Holderbank Switzerland ETH Zurich Architecture & Building Systems (A/S) Institute of Technology in Architecture (ITA) Department of Architecture (DARCH) Zurich Switzerland

retrofitting the residential building stock poses a major challenge for the European building sector in the coming years. It is also crucial to achieve the decarbonisation goals set by the EU's Energy roadmap 2050. The EASEE research project, funded by the European Commission, addressed this issue by developing a holistic approach to envelope retrofitting. This paper presents an innovative technical solution developed within this research project: a lightweight, aerogel-based wallpaper that can be easily installed on the inner side of perimeter walls. The system is composed of an aerogel-impregnated textile layer, forming the insulating core, and a fabric finishing that can be easily installed and replaced thanks to a bespoke tensioning device. The development of the system is explained starting from the identification of the challenges related to the application of an insulating layer to the internal face of an existing wall. These include building physics, as well as operational aspects to reduce disturbances of users. The insulating layer, based on a textile mat impregnated with aerogel, was tested and characterised at laboratory scale to ensure its high thermal performances and its permeability to water vapour. The fabric finishing system was also designed to provide the possibility of easy tensioning and disassembly for cleaning or replacement. An innovative device, based on plastic zips, was developed and patented within the project. As part of the process, specific studies were developed about cold bridges, thermal capacity and environmental impact of the system. The wallpaper was finally tested and monitored to assess its in-situ thermal performance and the assembly procedure on a building at Politecnico di Milano.

关键词： energy retrofit textile components SiO 2 aerogel indoor insulation performance assessment

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Airflow evaluation of wind farm site over complex terrain using LES turbulence model

Airflow evaluation of wind farm site over complex terrain us...

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International Conference on Power Engineering, ICOPE 2015

作者： Ohto, Hirohito Uchida, Takanori Taniyama, Yoshihiro Osako, Toshiki Department of Aeronautics and Astronautics Kyushu University 6-1 Kasuga-koen Kasuga Fukuoka816-8580 Japan Research Institute for Applied Mechanics Kyushu University 6-1 Kasuga-koen Kasuga Fukuoka816-8580 Japan New Energy and Generator Group Rotating Machine Technology R and D Department Power and Industrial Systems R and D Center Toshiba 2-4 Suehiro-cho Tsurumi-ku Yokohama230-0045 Japan Wind Power Engineering Group Renewable Energy Engineering Department Thermal and Hydro Power Systems and Services Div. Toshiba 72-34 Horikawa-cho Saiwai-ku Kawasaki212-8585 Japan

recently, the new wind farm has been successfully built in Nagashima island, Kagoshima prefecture. This site is located in complex terrain and, the flow above the ground is also thought to be complex. We analyzed the flow here using the rIAM-COMPACT (Uchida 2014) natural terrain version software, which is based on an LES turbulence model. The accuracy of this software was proved in previous studies. In addition to the CFd analysis, we also conducted airflow measurements using hot wire technique in the boundary layer wind tunnel of the research Institute for applied Mechanics, Kyushu University. In this experiment, the vertical wind velocity profile were obtained at 3 locations as time step data, from which we calculated turbulence. The value of scalar wind speed and turbulence by CFd and experiment generally has same tendency at each height of each location. These agreements demonstrates the validity of this CFd software based on LES turbulence modeling. © 2015 The Japan Society of Mechanical Engineers.

关键词： Computational fluid dynamics

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robotic Arm Control Inspired by Human Muscle Tension Effect under the Gravity

Robotic Arm Control Inspired by Human Muscle Tension Effect ...

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2011 IEEE International Conference on robotics and Automation(2011年IEEE世界机器人与自动化大会 ICrA 2011)

作者： Ji-Hun Bae Woosung Yang Sang-rok Oh Bum-Jae You doik Kim Yonghwan Oh Department of Applied Robot Technology Korea Institute of Industrial TechnologyAnsan R&D Center127 Human Factors & Devices Research Team Central Advanced Research & Engineering Institute of Hyundai M Cognitive Robotics Center Korea Institute of Science & TechnologyP.O. BOX 131CheongryangSeoul 130

In recent, control approaches for the human-like behavior in the field of service robotics have been attracting considerable attention, since most humans or animals perform various tasks uncomplicatedly. Hence simple control methods based on gaining a physical insight into human reaching movement in redundancy of dOFs have been proposed. In comparison with the conventional approaches, the proposed method tries to control directly robotic systems in task-space with the control signal composed of linear superposition of three terms 1) joint-damping, 2) virtual spring, and 3) virtual damper in task-space. In particular, our work contains a muscle tension effect of a human under the gravity. This give birth to energy efficient natural motions avoiding problems on repeatability of the motion and ill-posedness problems emerged in most of redundant dOF systems. Thus, this paper exhibits expendability of the position control into the orientation control and compliant behavior. It is verified with a real robotic arm that satisfies human-like movements and motion repeatability under kinematic redundancy of joints.

关键词： robot arm control Human-like motion redundant robots Manipulation

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room-temperature cavity exciton-polariton condensation in perovskite quantum dots

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Nature Communications 2025年第1期16卷 1-8页

作者： Ioannis Georgakilas darius Urbonas rafał Mirek Virginia Oddi rainer F. Mahrt Thilo Stöferle david Tiede Clara Bujalance Laura Caliò Juan F. Galisteo-López Hernán Miguez rui Tao dmitry N. dirin Gabriele rainò Simon C. Boehme Maksym V. Kovalenko IBM Research Europe – Zurich Säumerstrasse 4 8803 Rüschlikon Switzerland Institute of Quantum Electronics Department of Physics ETH Zürich Auguste-Piccard-Hof 1 8093 Zürich Switzerland Laboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland Multifunctional Optical Materials Group Institute of Materials Science of Seville Consejo Superior de Investigaciones Científicas − Universidad de Sevilla (CSIC-US) Américo Vespucio 49 Sevilla 41092 Spain Laboratory for Thin Films and Photovoltaics Empa − Swiss Federal Laboratories for Materials Science and Technology Ueberlandstrasse 129 8600 Dübendorf Switzerland

The exploitation of the strong light-matter coupling regime and exciton-polariton condensates has emerged as a compelling approach to introduce strong interactions and nonlinearities into numerous photonic applications. The use of colloidal semiconductor quantum dots with strong three-dimensional confinement as the active material in optical microcavities would be highly advantageous due to their versatile structural and compositional tunability and wet-chemical processability, as well as potentially enhanced, confinement-induced polaritonic interactions. Yet, to date, exciton-polariton condensation in a microcavity has neither been achieved with epitaxial nor with colloidal quantum dots. Here, we demonstrate room-temperature polariton condensation in a thin film of monodisperse, colloidal CsPbBr3quantum dots, placed in a tunable optical resonator with a Gaussian-shaped deformation serving as wavelength-scale potential well for polaritons. The onset of polariton condensation under pulsed optical excitation is manifested in emission by its characteristic superlinear intensity dependence, reduced linewidth, blueshift, and extended temporal coherence.

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diagnosis of water quality for carbon steel corrosion by Mahalanobis-Taguchi Method

Zairyo to Kankyo/ Corrosion Engineering

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Zairyo to Kankyo/ Corrosion Engineering 2006年第7期55卷 300-305页

作者： Itagaki, Masayuki Takamiya, Eri Watanabe, Kunihiro Nukaga, Takanori Umemura, Fumio Department of Pure and Applied Chemistry Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda 278-8510 Japan Materials Engineering Group R and D Center Tokyo Electric Power Company 4-1 Egasaki Tsurumi Yokohama 230-8510 Japan

Corrosion diagnostics of carbon steel in fresh water were carried out by Mahalanobis-Taguchi Method. Concentrations of sulfate ion, chloride ion and bicarbonate ion were used as items to judge the corrosion index. Artificial base areas were constructed by deciding standard deviations and the correlation coefficients arbitrarily. The items were classified into corrosion accelerator and corrosion inhibitor. "Closed" base area was constructed by using the axis of reciprocal concentration of corrosion inhibitor. The new method to construct on optimal base area artificially was developed. As the results to apply the present method to the experimental results of carbon steel in fresh water, the erroneous decision decreases remarkably comparing the conventional Mahalanobis-Taguchi Method.

关键词： Water quality

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Minimization of Image Processing resources and deduplication for recognition of Objects on Conveyor Belt

Minimization of Image Processing Resources and Deduplication...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Hye-Gyu Moon Kwang-Hee Lee Tae-Yong Kuc Hyun-Su Kim Kyung-Tae Nam Ji-Soo Shin School of Electrical and Electronics Engineering SungKyunKwan University Suwon Korea Robot R&D Group Korea Institute of Industrial Technology Ansan Korea Solworks Dongbaekjungang-ro16beon-gil Giheung-gu Yongin-si Gyeonggi-do Republic of Korea

This study aimed to enable the recognition of the positions and rotation data of objects using the machine vision technology in the packaging process and the pick& place operations by robots using the data. For these objectives, this study proposed the methods of controlling the trigger signals of the camera and minimizing the imaging processing CPU resources in consideration of the recognition range of the campera, size of objects and speed of the conveyor belt. In addition, this study also tried to resolve the problem of an object being recognized as separate objects in the multiple frames of the camera.

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