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Super Resolution for Improved Positioning of an MRI-Guided Spinal Cellular Injection Robot

Journal of Medical Robotics Research 2021年第1-2期6卷

作者： Martinez, Daniel Enrique Meinhold, Waiman Oshinski, John Hu, Ai-Ping Ueda, Jun Robotics PhD Program Georgia Institute of Technology North Ave NW Atlanta 30332 GA United States Department of Radiology Emory University 201 Dowman Dr Atlanta 30322 GA United States Intelligent Sustainable Technologies Division Georgia Tech Research Institute 640 Strong Street Atlanta 30318 GA United States George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology North Ave NW Atlanta 30332 GA United States

This paper presents the development of a magnetic resonance imaging (MRI)-conditional needle positioning robot designed for spinal cellular injection. High-accuracy targeting performance is achieved by the combination of a high precision, parallel-plane, needle-orientation mechanism utilizing linear piezoelectric actuators with an iterative super-resolution (SR) visual navigation algorithm using multi-planar MR imaging. In previous work, the authors have developed an MRI conditional robot with positioning performance exceeding the standard resolution of MRI, rendering the MRI resolution the limit for navigation. This paper further explores the application of SR to images for robot guidance, evaluating positioning performance through simulations and experimentally in benchtop and MRI experiments. © 2021 World Scientific Publishing Company.

关键词： cellular therapeutics magnetic resonance imaging needle steering spinal cord Super resolution surgical robots visual robot guidance

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Front Cover: Emergence of Non-photoresponsive Catalytic Techniques for Environmental Remediation and Energy Generation (Chem. Asian J. 9/2023)

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Chemistry – An Asian Journal 2023年第9期18卷

作者： Manish Kumar Sharma Dr. Imran Khan Kuldeep Kaswan Dr. Snigdha Roy Barman Prof. Dr. Subhajit Saha Wu-Chiao Hsieh Prof. Dr. Yu-Lun Chueh Prof. Dr. Yu-Lin Wang Prof. Dr. Sangmin Lee Prof. Dr. Dukhyun Choi Prof. Dr. Zong-Hong Lin Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013 Taiwan Institute of NanoEngineering and Microsystems National Tsing Hua University Hsinchu 30013 Taiwan International Intercollegiate PhD Program National Tsing Hua University Hsinchu 30013 Taiwan Department of Renewable Energy Maulana Abul Kalam Azad University of Technology West Bengal 741249 India Department of Obstetrics and Gynecology Chang Gung Memorial Hospital and College of Medicine Chang Gung University Taoyuan 333 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu 30013 Taiwan School of Mechanical Engineering Chung-Ang University Seoul 06974 South Korea Department of Mechanical Engineering Sungkyunkwan University Suwon 16419 South Korea Department of Biomedical Engineering National Taiwan University Taipei 10617 Taiwan

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Estimation of Transmission Lines Parameters Using Particle Swarm Optimization

Estimation of Transmission Lines Parameters Using Particle S...

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IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： Fermín Rafael Cabezas Soldevilla Franklin Alfredo Cabezas Huerta Faculty of Mechanical Engineering - PhD Program in Energetics National University of Engineering Lima Peru

ISBN: (纸本)9781538658451

The identification of the values with good accuracy of physical parameters of transmission systems is very important because using very different values from the real ones seriously distorts the evaluation of the planning, design, operation, maintenance and commercialization of the transmission systems. The present work describes the identification of physical parameters of a real transmission system using a mathematical model with variable values of the physical parameters. The identification is done by comparing the real operation of the system with the simulated operation of the model, varying iteratively the physical parameters values of the mathematical model. To this purpose two different techniques were applied, a classical and a modern meta-heuristic technique to 47 high voltage transmission lines of the Peruvian electrical system. The real operation is obtained from the database of the measurements of the operating variables of the transmission system. The correct values of the physical parameters will be those that correspond to the simulated operation identified. This paper is organized as follows: Section II describes the philosophy of the parameter estimation problem, here is included the symbology, the model of the transmission system, the formulation of the problem and its solution. In section III, the results of the identified parameters are presented and discussed. Finally, in section IV the conclusions are presented.

关键词： Estimation Mathematical model Transmission line measurements Power transmission lines Parameter estimation Loss measurement Pollution measurement

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Spray-drying synthesis of Bi 2 O 3 /BiVO 4 composites with thin carbon coating for high performance photocatalytic degradation of organic pollutant

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Journal of the Taiwan Institute of Chemical Engineers 2025年

作者： Kuen-Chan Lee Shih-Chieh Hsu Jen-Hsien Huang Tzu-Hsien Hsieh Wei Kong Pang Hsiang-Ting Lan Er-Chieh Cho Huei Chu Weng Ting-Yu Liu Department of Science Education National Taipei University of Education No. 134 Sec. 2 Heping E. Road Da-an District Taipei City 106 Taiwan PhD Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University 250 Wuxing Street Taipei City 110 Taiwan Department of Chemical and Materials Engineering Tamkang University No. 151 Yingzhuan Road Tamsui District New Taipei City 25137 Taiwan Department of Green Material Technology Green Technology Research Institute CPC Corporation No.2 Zuonan Rd. Nanzi District Kaohsiung City 81126 Taiwan Faculty of Engineering Institute for Superconducting & Electronic Materials University of Wollongong Wollongong NSW Australia Department of Materials Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Clinical Pharmacy School of Pharmacy College of Pharmacy Taipei Medical University 250 Wuxing Street Taipei City 110 Taiwan Department of Mechanical Engineering Chung Yuan Christian University No. 200 Chungpei Road Chungli District Taoyuan City 32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan City 32003 Taiwan College of Engineering & Center for Sustainability and Energy Technologies Chang Gung University Taoyuan 33302 Taiwan

Background To achieve efficient solar-to-chemical energy conversion in photocatalysis, it is crucial to develop visible-light-driven catalysts with excellent charge transport properties and superior activity. Methods Here, p-n heterostructured Bi 2 O 3 /BiVO 4 (BO/BVO) composites were synthesized via a spray-drying method, incorporating synergistic effects of oxygen vacancies and asphaltene-derived carbon coating. Significant findings The built-in electric field at the p −type BO and n-type BVO interface, combined with the electron sink effect of the coated graphitic carbon layer, enhances charge transfer while suppressing charge recombination. As a result, the carbon coated BO/BVO (C-BO/BVO) heterojunction reveals markedly improved efficiency for photodegradation of methylene blue (MB) in comparison with pure BO and BVO. Under visible light irradiation, the C-BO/BVO composite achieves an MB decomposition efficiency of 92.1 %, which is approximately 1.78, 2.23, and 2.98 times higher than that of BO/BVO, pure BVO, and pure BO, respectively. As a result, the C-BO/BVO composites exhibit superior degradation performance for MB and tetracycline (TC), achieving high rate constants of 6.51 × 10 −2 min −1 and 7.55 × 10 −3 min −1 , respectively. The C-BO/BVO photocatalysts also exhibit exceptional antibacterial activity against Escherichia coli ( E. coli ). Additionally, their biocompatibility has been assessed using an in vivo zebrafish embryo model, highlighting their potential for future biomedical applications.

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Prosthetic hand signals

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Significance 2018年第4期15卷 30-35页

作者： Mike Wininger Reva Johnson PhD has faculty appointments at the University of Hartford (Prosthetics Program) and Yale University (Department of Biostatistics) and is a statistician of clinical trials with the Department of Veterans Affairs. PhD is a professor in the Department of Mechanical Engineering and Bioengineering at Valparaiso University.

How Bayesian inference can decode movement intentions and control the next generation of powered prostheses. By Mike Wininger and Reva Johnson

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Surface tension assisted dynamic and uniform size generation of 3D spherical hydrogels (STA-DUH) 22

Surface tension assisted dynamic and uniform size generation...

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22nd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2018

作者： Koduri, Manohar Prasad Garden, Tom Hunt, John A. Henstock, James Curran, Judith Tseng, Fan-Gang International Intercollegiate PhD Program NTHU Hsinchu Taiwan Department of Mechanical Materials and Aerospace School of Engineering University of Liverpool United Kingdom School of Science and Technology Nottingham Trent University NottinghamNG11 8NS United Kingdom Institute of Ageing and Chronic Disease William Henry Duncan Building University of Liverpool United Kingdom Engineering and System Science Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Taiwan

ISBN: (纸本)9781510897571

Technologies like additive manufacturing, microfluidics, and electrospray show a possibility of generating a variety of 3-Dimensional structures but seriously suffer in adapting and utilizing the wide variety of available biocompatible materials because of innate diverse physical and chemical properties of biomaterials. It is very important to have a technology which can be viable and dynamically adaptable for different types of materials in generating uniform structures. This work presents a novel cell-laden hydrogel generation using the surface tension phenomenon in controlling the size of the hydrogel. Copyright © (2018) by Chemical and Biological Microsystems Society. All rights reserved.

关键词： Surface tension

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The anatomic determinants of conductive hearing loss secondary to tympanic membrane perforation

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Journal of Otology 2017年第3期12卷 125-131页

作者： David J.Carpenter Debara L.Tucci David M.Kaylie Dennis O.Frank-Ito Division of Head and Neck Surgery & Communication Sciences Department of Surgery Duke University Medical Center Durham NC USA Computational Biology & Bioinformatics PhD Program Duke University Durham NC USA Department of Mechanical Engineering and Materials Science Duke University Durham NC USA

Objectives: Recent studies have introduced middle ear volume(MEV) as a novel determinant of perforation-induced conductive hearing loss(CHL) in a mechanism driven by trans-tympanic membrane pressure differences. The primary aims of this preliminary report are to: 1) correlate CHL with perforation size; 2) describe the relationship between CHL and MEV; and 3) compare CHL across a range of cholesteatoma ***: A retrospective pilot study was performed in 31 subjects with audiometry indicative of conductive hearing loss, temporal bone CT scans,and no prior middle ear surgery. Perforation size and MEV were analyzed with respect to CHL in a cohort of 10 perforated ears with no cholesteatoma. CHLs were compared in 3 groups defined by extent of cholesteatoma ***: Ears with large and small perforations showed mean ABG values of 32.0 ± 15.7 dB and 16.0 ± 16.4 dB, respectively. A direct relationship was observed between MEV and CHL for ears with large perforations across all frequencies, whereas this relationship for small perforations was frequency-dependent. Finally, a statistically significant increase in CHL was found across ears with increasing cholesteatoma involvement at 1000 Hz(X^2(2) = 9.786, p = 0.008),2000 Hz(x^2(2) = 8.455, p = 0.015),and 4000 Hz(x^2(2)= 8.253, p = 0.016).Conclusions: These pilot data suggest that greater perforation-induced conductive hearing losses may be associated with larger perforation sizes and cholesteatoma. The correlation between MEV and CHL may require additional study.

关键词： Perforation-induced hearing loss Conductive hearing loss Middle ear volume Three-dimensional volume reconstruction

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Disagreement in middle ear volume estimation between tympanometry and three-dimensional volume reconstruction in the context of tympanic membrane perforation

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Journal of Otology 2017年第2期12卷 74-79页

作者： David J.Carpenter Debara L.Tucci David M.Kaylie Dennis O.Frank-Ito Division of Head and Neck Surgery&Communication Sciences Department of SurgeryDuke University Medical CenterDurhamNCUSA Computational Biology&Bioinformatics PhD Program Duke UniversityDurhamNCUSA Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNCUSA

Introduction: Middle ear volume(MEV) is a clinically relevant parameter across middle ear diseases. MEV values between these techniques have never before been tested for agreement in ears with perforated tympanic membranes(TMs).Methods: Middle ears were identified from 36 patients ranging 18-89 years of age with TM perforations who underwent tympanometry and temporal bone computed tomography(CT) between 2005 and 2015. MEVs calculated by both tympanometry and three-dimensional volume reconstruction(3DVR) were analyzed for agreement using Bland Altman plots. The differences between tympanometric and 3DVR MEV values for each given middle ear were characterized across MEV quartiles(1= smallest; 4= largest) and across increasing states of middle ear disease using Kruskale Wallis and Wilcoxon testing with Bonferroni ***: Bland Altman plots demonstrated significant disagreement between MEV measurement techniques. Differences between tympanometric(T) and 3DVR MEV values were significantly greater with increasing average(i.e.(Tt3DVR)/2)) MEV per linear regression(p < 0.0001). Significance was demonstrated between fourth and first average MEV quartiles(p= 0.0024), fourth and second quartiles(p= 0.0024), third and first quartiles(p= 0.0048), and third and second quartiles(p= 0.048). Absolute MEV difference was not significantly different across varying states of middle ear disease(p= 0.44).Conclusion: Statistically and clinically significant disagreement was demonstrated between tympanometric and 3DVR MEV values. Studies that vary in MEV estimation techniques may be expected to demonstrate significantly different results. These preliminary results suggest that clinicians should endeavor to seek further confirmation when interpreting high tympanometric MEV values.

关键词： Middle ear volume Tympanometry Three-dimensional volume reconstruction Tympanic membrane perforation

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Front Cover: Bioderived Molecular Electrodes for Next-Generation Energy-Storage Materials (ChemSusChem 9/2020)

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ChemSusChem 2020年第9期13卷 2101-2101页

作者： Mikhail Miroshnikov Kiran Mahankali Dr. Naresh Kumar Thangavel Dr. Sitakanta Satapathy Dr. Leela Mohana Reddy Arava Dr. Pulickel M. Ajayan Dr. George John Department of Chemistry and Biochemistry Center for Discovery and Innovation The City College of New York 85 St. Nicholas Terrace New York NY 10031 USA The PhD Program in Chemistry The Graduate Center of the City University of New York 365 5th Ave New York NY 10016 USA Department of Mechanical Engineering Wayne State University 5050 Anthony Wayne Dr. Detroit MI 48202 USA Department of Materials Science and NanoEngineering Rice University 6100 Main Street Houston TX 77005 USA

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Loading Dependent Electrical Properties of Hybrid Perovskite Composite Media

Loading Dependent Electrical Properties of Hybrid Perovskite...

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MRS Advances

作者： Murphy, John P. Andriolo, Jessica M. Sutton, Nathan J. Wyss, Gary Skinner, Jack L. Montana Tech Nanotechology Laboratory 1300 W. Park Street ButteMT59701 United States Materials Science PhD Program Montana State University System United States Individual Interdisiplinary PhD Program University of Montana 32 Campus Drive MissoulaMT59812 United States Mechanical Engineering Department Montana Tech 1300 W. Park Street ButteMT59701 United States Center for Advanced Mineral and Metallurgical Processing Montana Tech ButteMT59701 United States

Hybrid organic-inorganic perovskites (HOIPs) have been previously compounded with hydrophobic polymers in order to improve the resilience of HOIPs in humid environments. In this study HOIP particles were synthesized and dispersed into a polymer solution. The weight loading of the HOIP phase in the composite was increased until an abrupt change in the electrical conduction was observed indicating a percolation threshold was approached. Additionally, the CH3NH3PbI3/ polystyrene composite media was characterized to assess morphology and the effect it has on the observed electrical properties. Copyright © Materials Research Society 2017.

关键词： Perovskite

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