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An experimental study on evaporation rate of indoor plants

AIP Conference Proceedings 2024年第1期3090卷

作者： Y. Q. Nguyen Viet T. Nguyen Minh-Thu T. Huynh Computational Engineering and Design Research Group School of Engineering and Technology Van Lang University Ho Chi Minh City Vietnam Faculty of Engineering and Technology Binh Duong Economics and Technology University Binh Duong Vietnam Faculty of Vehicle and Energy Engineering Ho Chi Minh City University of Technology and Education 01 Vo Van Ngan St. Thu Duc City Ho Chi Minh City Viet Nam

Indoor plants have favorable effects on the human performance and indoor environment. It is well known that indoor plants lower the temperature but increase the humidity of the room air. The evaporation rate is different for different plat types and also contributed by the moisture content of the substrate. Therefore, in this study, we conducted experiment to evaluate the evaporation rate of five indoor plant types which are common in Viet Nam, i.e. Epipremnum aureum, Araliaceae, Calathea medallion, White Sails plant and Aglaonema hybrid. The evaporation rate was examined when the pots were either covered or uncovered. The results showed that with unwrapped pots, Araliaceae has the highest evaporation rate while with wrapped pots, the White Sails has the highest rate. The substrate was seen to contribute significantly to the evaporation. The effects of the air humidity are strong while those of the air temperature are weak in the tested range of the air temperature.

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Best practices for machine learning in antibody discovery and development

arXiv

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arXiv 2023年

作者： Wossnig, Leonard Furtmann, Norbert Buchanan, Andrew Kumar, Sandeep Greiff, Victor LabGenius Ltd. The Biscuit Factory 100 Drummond Road London LondonSE16 4DG United Kingdom Department of Computer Science University College London 66-72 Gower St LondonWC1E 6EA United Kingdom R&D Large Molecules Research Platform Sanofi Deutschland GmbH Industriepark Höchst Frankfurt am Main Germany Biologics Engineering R&D AstraZeneca CambridgeCB2 0AA United Kingdom Computational Protein Design and Modeling Group Computational Science Moderna Therapeutics 200 Technology Square CambridgeMA02139 United States Department of Immunology Oslo University Hospital University of Oslo Oslo Norway

Over the past 40 years, the discovery and development of therapeutic antibodies to treat disease has become common practice. However, as therapeutic antibody constructs are becoming more sophisticated (e.g., multi-specifics), conventional approaches to optimisation are increasingly inefficient. Machine learning (ML) promises to open up an in silico route to antibody discovery and help accelerate the development of drug products using a reduced number of experiments and hence cost. Over the past few years, we have observed rapid developments in the field of ML-guided antibody discovery and development (D&D). However, many of the results are difficult to compare or hard to assess for utility by other experts in the field due to the high diversity in the datasets and evaluation techniques and metrics that are across industry and academia. This limitation of the literature curtails the broad adoption of ML across the industry and slows down overall progress in the field, highlighting the need to develop standards and guidelines that may help improve the reproducibility of ML models across different research groups. To address these challenges, we set out in this perspective to critically review current practices, explain common pitfalls, and clearly define a set of method development and evaluation guidelines that can be applied to different types of ML-based techniques for therapeutic antibody D&D. Specifically, we address in an end-to-end analysis, challenges associated with all aspects of the ML process and recommend a set of best practices for each stage. © 2023, CC BY-NC-ND.

关键词： Antibodies

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Corrigendum to “The influence of site preference on the elastic properties of FCC_CoCrFeNi multi-principal element alloy” [J. Alloy. Compd. 965 (2023) 171426]

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Journal of Alloys and Compounds 2025年 1012卷

作者： Rong Chen LiangJi Weng Chubo Zhang Panhong Zhao Longju Su Tianliang Xie Cheng Qian Bo Wu Baisheng Sa Cuilian Wen Li Yang Yu Liu Chunxu Wang Xiaolan Yang Multiscale Computational Materials Facility & Materials Genome Institute School of Materials Science and Engineering Fuzhou University Fuzhou 350100 China Materials Design and Manufacture Simulation Facility School of Advance Manufacturing Fuzhou University Jinjiang 362200 China Central Iron & Steel Research Institute Group Beijing 100081 China School of Physics and Electronic Science Zunyi Normal College Zunyi 563002 China

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Deep Learning-based Intraoperative MRI Reconstruction

arXiv

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arXiv 2024年

作者： Ottesen, Jon André Storas, Tryggve Vatnehol, Svein Are Sirirud Løvland, Grethe Vik-Mo, Einar O. Schellhorn, Till Skogen, Karoline Larsson, Christopher Bjørnerud, Atle Groote-Eindbaas, Inge Rasmus Caan, Matthan W.A. Research Group Division of Radiology and Nuclear Medicine Oslo University Hospital Oslo Norway Department of Physics Faculty of Mathematics and Natural Sciences University of Oslo Oslo Norway Department of Physics and Computational Radiology Division of Radiology and Nuclear Medicine Oslo University Hospital Oslo Norway The Intervention Centre Oslo University Hospital Oslo Norway Department of Optometry Radiography and Lighting Design University of South-Eastern Norway Drammen Norway Department of Health Sciences Gjøvik Faculty of Medicine and Health Sciences NTNU Gjøvik Norway Department of Neurosurgery Oslo University Hospital Oslo Norway Department of Radiology Vestfold Hospital Trust Tønsberg Norway Amsterdam UMC University of Amsterdam Biomedical Engineering and Physics Amsterdam Netherlands Vilhelm Magnus Laboratory Department of Neurosurgery Oslo University Hospital Oslo Norway Institute for Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway

Purpose: To evaluate the quality of deep learning reconstruction for prospectively accelerated intraoperative magnetic resonance imaging (iMRI) during resective brain tumor surgery. Materials and Methods: Accelerated iMRI was performed during brain surgery using dual surface coils positioned around the area of resection. A deep learning (DL) model was trained on the fastMRI neuro dataset to mimic the data from the iMRI protocol. Evaluation was performed on imaging material from 40 patients imaged between 01.11.2021 - 01.06.2023 that underwent iMRI during tumor resection surgery. A comparative analysis was conducted between the conventional compressed sense (CS) method and the trained DL reconstruction method. Blinded evaluation of multiple image quality metrics was performed by two working neuro-radiologists and a working neurosurgeon on a 1 to 5 Likert scale (1=non diagnostic, 2=poor, 3=acceptable, 4=good, 5=excellent), and the favored reconstruction variant. Results: The DL reconstruction was strongly favored or favored over the CS reconstruction for 33/40, 39/40, and 8/40 of cases for reader 1, 2, and 3, respectively. Two of three readers consistently assigned higher ratings for the DL reconstructions, and the DL reconstructions had a higher score than their respective CS counterparts for 72%, 72%, and 14% of the cases for reader 1, 2, and 3, respectively. Still, the DL reconstructions exhibited shortcomings such as a striping artifact and reduced signal. Conclusion: DL shows promise to allow for high-quality reconstructions of intraoperative MRI with equal to or improved perceived spatial resolution, signal-to-noise ratio, diagnostic confidence, diagnostic conspicuity, and spatial resolution compared to compressed sense. Copyright © 2024, The Authors. All rights reserved.

关键词： Magnetic resonance imaging

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Ethical Aspects of computational Modelling in Science, Decision Support and Communication 15th

Ethical Aspects of Computational Modelling in Science, Decis...

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15th International Workshop on Artificial Life and Evolutionary Computation, WIVACE 2021

作者： Füchslin, Rudolf Marcel Ambühl, Jacques Faggian, Alessia Fellermann, Harold M. Flumini, Dandolo Geller, Armando Hanczyc, Martin M. Klinkert, Andreas Krütli, Pius Matuttis, Hans-Georg Ott, Thomas Scheidegger, Stephan Schmid, Gary Bruno Smieszek, Timo Schneider, Johannes J. Steiner, Albert Weyland, Mathias S. Institute of Applied Mathematics and Physics Zurich University of Applied Sciences Zurich Technikumstrasse 9 Winterthur8400 Switzerland European Centre for Living Technology Ca’ Bottacin Dorsoduro 3911 Calle Crosera Venice30123 Italy World Bank Group Geneva Switzerland University of Trento Trento38123 Italy School of Computing Newcastle University Science Square 1 Newcastle Upon TyneNE4 5TG United Kingdom GmbH Fraumünsterstrasse 11 Zurich8001 Switzerland Institute of Data Analysis and Process Design Zurich University of Applied Sciences Rosenstrasse 3 Winterthur8400 Switzerland Transdisciplinarity Lab ETH Zurich Zurich8092 Switzerland Department of Mechanical Engineering and Intelligent Systems The University of Electrocommunications Tokyo182-8585 Japan Institute of Computational Life Sciences Zurich University of Applied Sciences Schloss 1 Wädenswil8820 Switzerland Swiss NeuroCreations GmbH Hambergersteig 25 Zurich8008 Switzerland Muesmattweg 70 Allschwil4123 Switzerland

ISBN: (纸本)9783031239281

The development of data science, the increase of computational power, the availability of the internet infrastructure for data exchange and the urgency for an understanding of complex systems require a responsible and ethical use of computational models in science, communication and decision-making. Starting with a discussion of the width of different purposes of computational models, we first investigate the process of model construction as an interplay of theory and experimentation. We emphasise the different aspects of the tension between model variables and experimentally measurable observables. The resolution of this tension is a prerequisite for the responsible use of models and an instrumental part of using models in the scientific processes. We then discuss the impact of models and the responsibility that results from the fact that models support and may also guide experimentation. Further, we investigate the difference between computational modelling in an interdisciplinary science project and computational models as tools in transdisciplinary decision support. We regard the communication of model structures and modelling results as essential;however, this communication cannot happen in a technical manner, but model structures and modelling results must be translated into a "narrative." We discuss the role of concepts from disciplines such as literary theory, communication science, and cultural studies and the potential gains that a broader approach can obtain. Considering concepts from the liberal arts, we conclude that there is, besides the responsibility of the model author, also a responsibility of the user/reader of the modelling results. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Decision making

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Corrigendum to “A general approach to simulate the atom distribution, lattice distortion, and mechanical properties of multi-principal element alloys based on site preference: Using FCC_CoNiV and CoCrNi to demonstrate and compare” [J. Alloy. Compd. 935(1) (2023) 168016]

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Journal of Alloys and Compounds 2023年 955卷

作者： Rong Chen Tianliang Xie Bo Wu Liangji Weng Hamid Ali Shuwen Yang Yan Zhao Panhong Zhao Chubo Zhang Renhui Cao Jiansen Wen Qipeng Yao Qi Cai Haifeng Zhang Baisheng Sa Cuilian Wen Maohua Lin Xu Sun Hang Su Yu Liu Chunxu Wang Multiscale Computational Materials Facility Key Laboratory of Eco-Materials Advanced Technology College of Materials Science and Engineering Fuzhou University Fuzhou 350100 China Materials Design and Manufacture Simulation Facility School of Advance Manufacturing Fuzhou University Jinjiang 362200 China Central Iron & Steel Research Institute Group Beijing 100081 China Department of Ocean and Mechanical Engineering Florida Atlantic University Boca Raton 33431 USA

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Unexpectedly Strong Chiral Amplification of Chiral/Achiral and Chiral/Chiral Copolymers of Biphenylylacetylenes and Further Enhancement/Inversion and Memory of the Macromolecular Helicity (vol 141, pg 7605, 2019)

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 2019年第48期141卷 19186-19190页

作者： Ishidate, Ryoma Markvoort, Albert J. Maeda, Katsuhiro Yashima, Eiji [†]Department of Molecular Design and Engineering Graduate School of Engineering Nagoya University Chikusa-ku Nagoya 464-8603 Japan [‡]Institute for Complex Molecular Systems and Computational Biology Group Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands [§]Graduate School of Natural Science and Technology and[∥]WPI Nano Life Science Institute (WPI-NanoLSI) Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan [⊥]Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Chikusa-ku Nagoya 464-8603 Japan

We report an unexpectedly strong amplification of the macromolecular helicity in dynamic helical copolymers of chiral/achiral and chiral/chiral (R/S) biphenylylacetylenes in which the chiral residues are remote from the biphenyl pendants and further from the main chains. The copolymers consisting of 20 mol % chiral monomers and chiral monomers of 20% enantiomeric excess (ee) showed a full induced circular dichroism as intense as that of the chiral homopolymer. In contrast, an analogous poly(phenylacetylene) bearing the identical chiral residue (100% ee) showed no circular dichroism in the polymer backbone, indicating the critical role of the biphenyl moieties in the observed high chiral amplification. As anticipated, the helix-sense excesses of the copolymer backbones composed of a small amount of chiral units (<20 mol %) and chiral units of low ee (<20%) were reduced. Interestingly, however, the macromolecular helicity of the copolymers was further drastically enhanced as a greater excess of a one-handed helix or inverted upon noncovalent interaction with nonracemic alcohols and subsequently retained (memorized) after complete removal of the chiral alcohol. Even in a polymer consisting of completely racemic repeating units, one-handed right- and left-handed helices could almost be induced and memorized. These unique hierarchical amplifications and memory of the macromolecular helicity in the copolymers by the covalent and further noncovalent chiral interactions are quantitatively explained on the basis of a linear Ising model.

关键词： Chirality Circuits Copolymers Noncovalent interactions Polymers

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Novel Thermal Management System for High Power Hybrid Electric Vehicles

SSRN

引用

SSRN 2022年

作者： Nikolaidis, Theoklis Jafari, Soheil Sibilli, Thierry Kipouros, Timoleon Ayat, Sabrina Isikveren, Askin Centre for Propulsion and Thermal Power Engineering Cranfield University BedfordMK43 0AL United Kingdom Airbus Operations GmbH Kreetslag 10 HamburgD-21129 Germany Formerly Company Expert on Thermal Systems SAFRAN Tech Safran Paris Saclay France SAFRAN Paris Saclay Châteaufort CS 80112 Magny-les-Hameaux78772 France SAFRAN S.A. c/o Aerospace Embedded Solutions GmbH Munich80639 Germany Reader in Gas Turbine Performance and Numerical Simulation Centre for Propulsion Engineering and Power United Kingdom Lecturer in Gas Turbine Thermal Management and Control Centre for Propulsion Engineering and Power United Kingdom Hydrogen Fuel System Development Engineer Airbus Operations GmbH Kreetslag 10 HamburgD-21129 Germany Formerly Company Expert on Thermal Systems SAFRAN Tech Safran Paris France Senior Lecturer in Computational Engineering Design Optimisation Centre for Propulsion Engineering and Power United Kingdom Research Engineer Electrical & Electronic Systems Group Safran Tech SAFRAN Paris Saclay France Advanced Aircraft Concepts and Energy Systems Senior Group Expert Integrated Aircraft Systems and Operations SAFRAN Tech France

New generation of propulsion systems are increasingly complex with higher requirements on engines for efficiency, thrust and power generation. As a side effect, the produced thermal loads are higher, imposing limitations on the air vehicle performance. The current paper offers a novel methodology for thermal management system architecture design for high power hybrid electric propulsion systems. Four cases are investigated including state-of-the-art conventional thermal management system, pre-heated two-phase thermal management system, utilizing thermally neutral heat transfer fluids in a two-phase cooling mechanism, and a combination of single- and two-phase thermal management system architectures. For this purpose, a Vertical Take-Off and Landing multi-mission aircraft is selected as the case study in which the existing mechanically driven lift fan is replaced by an electric fan to replicate a high-power hybrid electric propulsion system of the future generation. The results confirm that the performance of the pre-heated two-phase thermal management system surpasses the other cases without exceeding the temperature limit. On the contrary, the state-of-the-art conventional system can operate only for 70 seconds. So, the results confirm the effectiveness of the proposed thermal management system architecture in dealing with MW scale thermal loads generated by next generation high power hybrid electric propulsion systems. © 2022, The Authors. All rights reserved.

关键词： Temperature control

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A stabilized RBF finite difference method for convection dominated flows over meshfree nodes

A stabilized RBF finite difference method for convection dom...

引用

AIAA Aerospace Sciences Meeting, 2018

作者： Javed, A. Djidjeli, K. Jamil, M. Arif, I. National University of Sciences and Technology Aerospace Engineering Department College of Aeronautical Engineering Islamabad Pakistan Computational Engineering and Design Group University of Southampton United Kingdom

ISBN: (纸本)9781624105241

In this paper, a stabilized solution scheme is presented for solving highly convective flow equations on meshfree nodal distribution. The stabilized terms are obtained by considering higher order approximation of governing differential equations over finite control volume while applying force and momentum balance. Spatial derivatives, of resulting flow equations, are treated with Radial Basis Functions in Finite Difference Method (RBF-FD) over meshfree domain. The characteristic length, for applying equilibrium of forces and momentum, is proposed to be a function of Reynolds number and flow velocity. Performance and accuracy of the proposed scheme is tested for 1-D Convection-Diffusion equations. Numerical tests are conducted for initial conditions having stepped as well as uniformly varying field variables. The scheme is found to be effective in suppressing the non-physical numerical fluctuations associated with convection dominated flows. Accuracy of the solution with stabilized term is found to be higher than the one without stabilization. The solution scheme is also used for flow around static NACA0012 airfoil at Reynolds Number 5000, 10000 and 50000. The stabilization term is found to effectively suppress the numerical oscillation when compared to non-stabilized scheme. © 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Reynolds number

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On a simple nonlinear system with circulatory forces

On a simple nonlinear system with circulatory forces

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90th Annual Meeting of the International Association of Applied Mathematics and Mechanics, GAMM 2019

作者： Barakat, Ahmed A. Hagedorn, Peter Dynamics and Vibrations Group Technische Universität Darmstadt Dolivostr.15 Darmstadt64293 Germany Graduate School of Computational Engineering Technische Universität Darmstadt Dolivostr. 15 Darmstadt64593 Germany Design and Production Engineering Dept. Faculty of Engineering Ain Shams University ElSarayat st. 1 Cairo11517 Egypt

Self-excited vibrations in mechanical system have been always gathering attention since being problematic for various applications, including brake squeal, aerodynamic flutter, machining chatter, and galloping transmission lines, or in some cases beneficial as in some musical instruments (ex. violin) or resonant MEMS. These vibrations can have different origins, such as ‘negative damping’ (such as in the classical Van der Pol oscillator) and/or circulatory forces (i.e. ‘follower forces’, nonconservative positional forces). Both the negative damping and the circulatory forces can have different physical origins. It is well known that frictional forces generated between bodies in sliding contact can generate circulatory terms as well as damping and other types of forces. In particular, if one of two bodies in frictional contact moves with a constant speed or angular velocity, the other one being capable to oscillate, this implies an energy source for the oscillating part of the system. This has been identified as the cause for many self-excited vibrations. In this presentation a very simple nonlinear two-degree-offreedom system of this general type is examined in some detail. It has recently been proposed in the literature as a paradigm for frictionally generated circulatory forces, for which the equations of motion can be derived from first principles. Other related systems have been presented in the literature before, but this newer system seems to be much simpler than the earlier ones and presents a great wealth of dynamic behavior. The nonlinear equations of motion of this 2-DoF system always have the trivial solution and, depending on the system’s parameters, also non-trivial stationary solutions. The stability of the different stationary solutions is discussed in some detail. It was interesting to note that the increase of the friction parameter drives the system towards instability. This does however not happen, if the stiffness of both springs are identical, w

关键词： Nonlinear equations

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