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Pseudo-bulk SAW transducers fabricated in GaN epitaxial layers grown on sapphire substrate

Journal of Physics: Conference Series 2021年第1期1736卷

作者： B Paszkiewicz Ł Gierz Wroclaw University of Science and Technology Faculty of Microsystem Electronics and Photonics Janiszewskiego 11/17 50-372 Wrocław Poland Poznan University of Technology Department of Mechanical Engineering Institute of Machine Design Piotrowo 3 60-965 Poznań Poland

Gallium nitride is a material commonly applied to the fabrication of various semiconductor devices, naming High Electron Mobility Transistors (HEMT) and Light Emitting Diodes (LED). Its unique feature is that it also possesses good piezoelectric properties. This enables to produce devices that integrate both active transistor operation and signal processing and filtration in one monolithic chip. This aim requires a comprehensive analysis of the acoustic wave propagation in the gan/sapphire system. Particularly attractive in the construction of modern acoustic instruments, due to higher propagation speeds, is the utilisation of pseudo-bulk mods. This paper presents the results of research on Surface Acoustic Wave (SAW) transducers using pseudo-bulk waves propagating in thin (2-6 μm) layers of GaN on sapphire. The layers were made by the MOVPE process using a low-temperature buffer layer. Transducers with a two-finger pitch of 9 and 18 μm with 48 and 24 periods respectively were made using electron lithography. Low finger resistivity was achieved by using Ru/Au/Ti/Au metal alloy. The results of microwave measurements identifying particular pseudo-bulk mods and their dispersion characteristics are presented. Two pseudo-bulk mods were observed, the first one with a propagation velocity range of 8500-7800 ms−1 and the second one of 7200-7300 ms−1. Additionally, pseudo-bulk modes were also compared with classical Rayleigh modes generated in the same transducers at lower frequencies. The results are important from the point of view of possible monolithic integration of the tested transducers with High Electron Mobility Transistors.

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Structural design and construction of reinforced concrete shell structure with shallow freeform surface: - Structural planning and design policy (Part 1)

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AIJ Journal of Technology and design 2017年第54期23卷 453-458页

作者： Hamada, Hideaki Komatsu, Hirotoshi Sasaki, Mutsuro Dept. of Architecture Faculty of Engineering and Design Hosei Univ. Japan Komatsu Structural Design Japan

The roof of the Teshima Art Museum's main building in Teshima, Kagawa Prefecture, is a reinforced concrete shell with a freeform curved surface in the shape of a water droplet, having a maximum span of 41.2m, a maximum rise 5.12m and thickness of 250mm. This paper discusses the structural planning, design and construction methods for implementing such shallow, thin RC shells with freeform curved surfaces. Especially, we described in detail about the building summary, the form-finding of shells by computational morphogenesis and the policy of structural design.

关键词： Structural design

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Eggshell as an adsorbent for removing dyes and metallic ions in aqueous solutions

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Cleaner Chemical engineering 2022年 2卷

作者： Rayane de Oliveira Zonato Bianca Ramos Estevam Isadora Dias Perez Valquíria Aparecida dos Santos Ribeiro Rosane Freire Boina Laboratory of Water Wastewater and Reuse – Faculty of Technology and Sciences São Paulo State University (UNESP) Roberto Símonsen St 305 Presidente Prudente-SP 19060-900 Brazil Laboratory of Optimization Design and Advanced Control - Faculty of Chemical Engineering University of Campinas (UNICAMP) Albert Einstein Ave 500 Campinas-SP 13083-852 Brazil Laboratory of Studies in Environmental Technologies – Technological Federal University of Paraná (UTFPR) 635 Marcilio Dias St Apucarana-PR 86812-460 Brazil

Contamination of water with metallic ions and dyes leads to several impacts on the environment and human health. The adsorption comes as an economic and simple process to remove these pollutants from water. The use of residues as adsorbents can make the process even more sustainable and cheaper. This work proposes the use of a solid residue (eggshells) as an adsorbent of dyes - Reactive Blue 198 (RB) and Direct Black 22 (DB) - and metallic ions (Cd 2+ and Cr 3+ ). The solid was characterized by SEM, EDS, FTIR, BET and pH-PZC; and the adsorption process was investigated for the adsorbent dosage, kinetic and isotherm analysis. The quantifications of dyes and metallic ions were determined by UV-VIS spectroscopy and atomic absorption spectroscopy, respectively. The eggshells presented a porous structure, with a surface area of 435 cm 2 .g −1 , composed mainly of CaCO 3 and a neutral surface charge at pH 7. It was verified that the phenomenon occurs by chemical interactions between the adsorbents and the adsorbates, having the external transport as the limit step. Regarding the isotherm models, the dyes fit the Langmuir model and the metallic ions to the Dubinin-Radushkevich model. 1.0 g of eggshells was sufficient to adsorb 96 % of RB; 97 % of BD; 99 % of Cd 2+ ; and 95 % of Cr 3+ . Thus, the process analyzed in this research shows to be a promising alternative for removing these water pollutants while giving use to a solid residue.

关键词： Hazardous pollutants Textile dye wastewater Bioadsorbent Batch adsorption Wastewater treatment

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The Sixth European Society of Pharmacogenomics and Personalised Therapy Congress (Belgrade, 8-9 November 2022)

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PHARMACOGENOMICS 2023年第5期24卷 243-246页

作者： van Schaik, Ron H. N. Manolopoulos, Vangelis G. Daly, Ann K. Niemi, Mikko Zukic, Branka Patrinos, George P. Primorac, Dragan Swen, Jesse J. Ingelman-Sundberg, Magnus Morris, Tiffany Molden, Espen Mueller, Daniel Pavlovic, Sonja Russmann, Stefan Ansari, Marc Henricks, Linda M. van den Broek, Wout Florindi, Francesco Bozina, Nada Akin, Demet Christrup, Lona Llerena, Adrian Sipeky, Cilla Stankovic, Sanja Department of Clinical Chemistry Erasmus MC-University Medical Center Rotterdam The Netherlands Department of Pharmacology Democritus University of Thrace Alexandroupolis Greece Translational & Clinical Research Institute Newcastle University Newcastle upon Tyne UK Department of Clinical Pharmacology University of Helsinki Helsinki Finland Institute of Molecular Genetics & Genetic Engineering University of Belgrade Belgrade Serbia Laboratory of Pharmacogenomics & Individualised Therapy University of Patras Department of Pharmacy Patras Greece Department of Genetics & Genomics United Arab Emirates University College of Medicine & Health Sciences Al Ain Abu Dhabi UAE Zayed Center for Health Sciences United Arab Emirates University Al Ain Abu Dhabi UAE St. Catherine Specialty Hospital Zagreb Croatia Department of Clinical Pharmacology & Toxicology Leiden University Medical Center Leiden The Netherlands Department of Physiology & Pharmacology Karolinska Institutet Stockholm Sweden Precision Health & Pharmacogenomics Illumina Cambridge UK Department of Pharmacy University of Oslo Oslo Norway Department of Psychiatry University of Toronto Toronto Canada ETH Zürich Hirslanden Hospitals & drugsafety.ch Switzerland Cansearch Research Platform for Pediatric Oncology & Hematology Faculty of Medicine Department of Pediatrics Gynecology & Obstetrics University of Geneva Switzerland Division of Pediatric Oncology & Hematology Department of Women Child & Adolescent University Geneva Hospitals Geneva Switzerland Department of Clinical Chemistry Leiden University Medical Center Leiden The Netherlands Strategy & Partnership Thermo Fisher Scientific Brussels Belgium Department of Pharmacology University of Zagreb Zagreb Croatia Department of Pharmacology Bahcesehir University Istanbul Turkey Department of Drug Design & Pharmacology University of Copenhagen Copenhagen Denmark INUBE Biosanitary University Research Institute University of Extramedura Spain Depar

On 8-9 November 2022, the European Society of Pharmacogenomics and Personalised Therapy organized its sixth biennial congress, in Belgrade, Serbia (congress website: ). The congress aimed to address the current status and future perspectives of pharmacogenomics, share latest knowledge in the field of precision medicine and showcase the implementation of clinical applications in pharmacogenomics/pharmacogenetics. The 2 day congress consisted of 17 lectures given by key-opinion leaders and included a poster session plus discussions. The meeting was a great success by generating an informal environment and enabling the exchange of information between 162 participants from 16 different countries.

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Increasing the accuracy of measuring the absorption capacity of biological tissues in the millimeter wavelength range

Increasing the accuracy of measuring the absorption capacity...

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International Conference on Radio Electronics & Info Communications (UkrMiCo)

作者： Konstantyn L. Shevchenko Oleksiy P. Yanenko Julia V. Shtefura Oleksandr V. Aleksashin Faculty of Instrumentation Engineering National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Kyiv Ukraine Faculty of Radio Engineering National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Kyiv Ukraine Faculty of Mechatronics and Computer Technologies Kyiv National University of Technologies and Design Kyiv Ukraine Faculty of Technology of Grain and Grain Business Odessa National Academy of Food Technologies Odessa Ukraine

ISBN: (数字)9781728126920

ISBN: (纸本)9781728126937

This study presents the analysis of the existing methods for assessing the absorption capacity of biological tissues in the millimeter wavelength range. Problems that were encountered during it are shown. A functional flow diagram of the device, which provides an increase in the accuracy of measuring the absorption capacity, is suggested. The algorithm of operation of the suggested device was described in detail.

关键词： Absorption Oscillators Biological tissues Frequency modulation Detectors

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Bayesian Approach to Probabilistic design Space Characterization: A Nested Sampling Strategy

arXiv

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arXiv 2020年

作者： Kusumo, Kennedy P. Gomoescu, Lucian Paulen, Radoslav Muñoz, Salvador García Pantelides, Constantinos C. Shah, Nilay Chachuat, Benoît Centre for Process Systems Engineering Department of Chemical Engineering Imperial College London LondonSW7 2AZ United Kingdom Process Systems Enterprise Ltd LondonW6 7HA United Kingdom Faculty of Chemical and Food Technology Slovak University of Technology in Bratislav Bratislava812 43 Slovakia Small Molecule Design and Development Lilly Research Laboratories Eli Lilly & Company IndianapolisIN46285 United States

Quality by design in pharmaceutical manufacturing hinges on computational methods and tools that are capable of accurate quantitative prediction of the design space. This paper investigates Bayesian approaches to design space characterization, which determine a feasibility probability that can be used as a measure of reliability and risk by the practitioner. An adaptation of nested sampling—a Monte Carlo technique introduced to compute Bayesian evidence—is presented. The nested sampling algorithm maintains a given set of live points through regions with increasing probability feasibility until reaching a desired reliability level. It furthermore leverages efficient strategies from Bayesian statistics for generating replacement proposals during the search. Features and advantages of this algorithm are demonstrated by means of a simple numerical example and two industrial case studies. It is shown that nested sampling can outperform conventional Monte Carlo sampling and be competitive with flexibility-based optimization techniques in low-dimensional design space problems. Practical aspects of exploiting the sampled design space to reconstruct a feasibility probability map using machine learning techniques are also discussed and illustrated. Finally, the effectiveness of nested sampling is demonstrated on a higher-dimensional problem, in the presence of a complex dynamic model and significant model uncertainty. Copyright © 2020, The Authors. All rights reserved.

关键词： Bayesian networks

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Preliminary study of local plant utilization (Mahogany) for natural textile dyes

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IOP Conference Series: Earth and Environmental Science 2021年第1期667卷

作者： N Novita D Dahlan M Bahi E Erni Department of Family Welfare Faculty of Teacher Training and Education Universitas Syiah Kuala Darussalam 23111 Banda Aceh Indonesia. Biology Department Faculty of Mathematic and Natural Sciences Universitas Syiah Kuala Darussalam 23111 Banda Aceh Indonesia. Chemistry Department Faculty of Mathematic and Natural Sciences Universitas Syiah Kuala Darussalam 23111 Banda Aceh Indonesia. Department of Fashion Design Faculty of Engineering Medan Area University Deli Serdang North Sumatra 20221

The use of synthetic dyes in textiles has bad impact on human health and pollution in environment. To solve this problem, it is important to get the information about the potential of various types of plants that can produce natural substances as dyeing agent. This research was to examine the colors contained in Mahogany (Swietania mahagoni L.) scattered in Aceh Province using three types of color fixations (alum, Lime, and iron sulfate). The various colors produced from this plant can be grouped into 2 colors i.e. grey and brown. The fixator had played an important role in binding the colors of the plant so that the resulting colors do not fade easily. Two textile products, pashmina and headscarf, are dyed using the natural coloring from mahogany and decorated with Acehnese traditional motifs are produced in this research. The authenticity from the natural dye cannot be produced twice from the same plant. Therefore, the exotic accent combined with the traditional motifs as well as the comfort of the consumers are important because it is not harmful to the health of the wearers. These reasons make this product very interesting in the market even though the price is high.

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A Low Power 180 nm CMOS Power Amplifier with 47% PAE for NB IoT Application

A Low Power 180 nm CMOS Power Amplifier with 47% PAE for NB ...

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IEEE International Conference on Circuits and Systems (ICCAS)

作者： Sureshkumar Subramian Pravinah Shasidharan Jagadheswaran Rajendran Arjuna Bin Marzuki Harikrishnan Ramiah Collaborative Microelectronics Design Excellence Centre (CEDEC) Universiti Sains Malaysia Bayan Lepas Penang Malaysia School of Electrical and Electronic Engineering Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal Penang Malaysia Faculty of Engineering Universiti of Malaya Kuala Lumpur Malaysia

This paper presents the design of 180 nm single-stage CMOS Class-AB power amplifier (PA) for Narrow-Band Internet of Things (NB-IoT) application. The PA's targeted operating frequency is 1.95 GHz which is located at the Band 1 frequency bandwidth of NB-IoT. At schematic level simulation, the PA achieved a 12 dB power gain and maximum output power of 23 dBm. The peak PAE achieved is 47% with corresponding peak OIP3 of 37 dBm. The CMOS PA operated under the headroom of 3.3 V voltage supply with the gate biasing voltage supply of 0.8 V. The designed single-stage CMOS PA provides good efficiency with a minimum trade-off between linearity and output power which makes it suitable for NB-IoT application.

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Spectrally resolved NOON state interference

arXiv

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arXiv 2021年

作者： Jin, Rui-Bo Shimizu, Ryosuke Ono, Takafumi Fujiwara, Mikio Deng, Guang-Wei Zhou, Qiang Sasaki, Masahide Takeoka, Masahiro Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan430205 China National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei Tokyo184-8795 Japan University of Electro-Communications 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan Faculty of Engineering and Design Kagawa University 2217-20 Hayashi-cho Takamatsu Kagawa Japan JST PRESTO 4-1-8 Honcho Kawaguchi Saitama332-0012 Japan Institute of Fundamental and Frontier Sciences School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Keio University 3-14-1 Hiyoshi Kohoku Yokohama Kanagawa223-8522 Japan

NOON state interference (NOON-SI) is a powerful tool to improve the phase sensing precision, and plays an important role in quantum measurement. In most of the previous NOON-SI experiments, the measurements were performed in time domain where the spectral information of the involved photons was integrated and lost during the measurement. In this work, we experimentally measured the joint spectral intensities (JSIs) at different positions of the interference patterns in both time and frequency domains. It was observed that the JSIs were phase-dependent and show odd (even)number patterns at 0 (π) phase shift;while no interference appeared in time domain measurement, the interference pattern clearly appeared in frequency domain. To our best knowledge, the latter is the first observation of the spectrally resolved NOON state interference, which provides alternative information that cannot be extracted from the time-domain measurement. To explore its potential applications, we considered the interferometric sensing with our setup. From the Fisher information-based analysis, we show that the spectrally resolved NOON-SI has a better performance at nonzero-delay position than its non-spectrally resolved counterpart. The spectrally resolved NOON-SI scheme may be useful for quantum metrology applications such as quantum phase sensing, quantum spectroscopy, and remote synchronization. © 2021, CC BY.

关键词： Fisher information matrix

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Supramolecular Rare Sugar

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IOP Conference Series: Materials Science and engineering 2020年第1期835卷

作者： Tomohiko Ishii Tatsuya Senoo Hiroaki Taguchi Kouta Sogo Bui Quoc Huy Norito Taniguchi Syuichi Katsumoto Natsumi Nagayama Genta Sakane Program in Advanced Materials Science Department of Engineering and Design Faculty of Engineering and Design Kagawa University 2217-20 Hayashi-cho Takamatsu Kagawa 761-0396 JAPAN. Department of Chemistry Faculty of Science Okayama University of Science 1-1 Ridaicho Kita-ku Okayama Okayama 700-0005 JAPAN

We introduce rare sugars including their derivatives and supramolecular rare sugars, that have been actively researched at Kagawa University, Japan. Although the rare sugars are special sugars which hardly exist in nature, we has succeeded in mass synthesis of the rare sugars by utilizing biological enzyme isomerization reaction. In addition, the rare sugars have various functions such as blood sugar level suppressing function, cancer cell growth suppressing function, and antibacterial action. In addition, since rare sugars have a large number of hydroxyl groups, they have a possibility for using as devices for expressing various functions by employing them as ligands of transition metal complexes. In recent years, it is successful that we have synthesized the suplamolecular rare sugars (SRSs) from the different types of rare sugars, that is not as simple mixtures but as single crystals having supralattice structure, that can be freely controlled optical rotation. It has been found that the crystal structures of these SRSs mostly follow the Wallach rule, but do not satisfy the Wallach rule especially in the case of D, L-psicose. Therefore, we have investigated the single crystal X-ray structural analyses of SRSs, obtaining the detailed crystal structure data, and analyzed the intermolecular interaction between their sugar molecules in the crystal by means of the DV-Xα molecular orbital calculation. According to our detailed analysis of the research, calculating the intermolecular interaction revealed that the stability of the intermolecular interaction in the crystal can not be explained only by following the simple Wallach rule. Specifically, for example in the case of D, L-psicose, the total energy in a crystal can be stabilized by aligning the polarization vectors of the molecules, and as a result, we have clarified that the SRSs crystal structure can be stabilized, even if it does not follow the simple Wallach rule.

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