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Ranking Magnetic Colloid Performance for Magnetic Particle Imaging and Magnetic Particle Hyperthermia

Advanced Functional Materials 2025年第2期35卷 2412321页

作者： Carlton, Hayden Salimi, Marzieh Arepally, Nageshwar Bentolila, Gabriela Sharma, Anirudh Bibic, Adnan Newgren, Matt Goodwill, Patrick Attaluri, Anilchandra Korangath, Preethi Bulte, Jeff W.M. Ivkov, Robert Department of Radiation Oncology and Molecular Radiation Sciences the Johns Hopkins University School of Medicine BaltimoreMD21231 United States Russell H. Morgan Department of Radiology and Radiological Science Division of MR Research the Johns Hopkins University School of Medicine BaltimoreMD21205 United States Cellular Imaging Section and Vascular Biology Program Institute for Cell Engineering the Johns Hopkins University School of Medicine BaltimoreMD21205 United States Department of Mechanical Engineering School of Science Engineering and Technology The Pennsylvania State University – Harrisburg HarrisburgPA17057 United States F.M. Kirby Research Center for Functional Brain Imaging Kennedy Krieger Inc. BaltimoreMD21205 United States Magnetic Insight Inc. AlamedaCA94502 United States Department of Biomedical Engineering the Johns Hopkins University School of Medicine BaltimoreMD21205 United States Department of Chemical & Biomolecular Engineering Whiting School of Engineering Johns Hopkins University BaltimoreMD21218 United States Department of Oncology Sydney Kimmel Comprehensive Cancer Center Johns Hopkins University School of Medicine BaltimoreMD21287 United States Department of Mechanical Engineering Whiting School of Engineering Johns Hopkins University BaltimoreMD21218 United States Department of Materials Science and Engineering Whiting School of Engineering Johns Hopkins University BaltimoreMD21218 United States

Magnetic particle imaging (MPI) is an emerging modality that can address longstanding technological challenges encountered with magnetic particle hyperthermia (MPH) cancer therapy. MPI is a tracer technology compatible with MPH for which magnetic nanoparticles (MNPs) provide signal for MPI and heat for MPH. Identifying whether a specific MNP formulation is suitable for both modalities is essential for clinical implementation. Current models predict that functional requirements of each modality impose conflicting demands on nanoparticle magnetic properties. This objective here is to develop a measurement and ranking scheme based on end-use performance to streamline evaluation of candidate MNP formulations. The measured MPI point-spread function (PSF) and specific loss power (SLP) is combined to generate a single numerical value for comparison on a relative ranking scale, or figure of merit (FoM). 12 aqueous iron-containing formulations are evaluated, including FDA-approved (parenteral) iron-containing colloids. MNPs with high (Synomag-D70: 123.4), medium (Synomag-D50: 63.2), and low (NanoXact: 0.147) FoM values are selected for in vivo validation of the selection scheme in subcutaneous 4T1 tumors. Results demonstrate that the proposed ranking accurately assessed the relative performance of MNPs for MPI and MPH. Data demonstrated that image quality and tumor temperature rise increased with FoM ranking, validating predictions. It isshown that the MPI signal correlated with MNP concentration in tissue. Computational heat transfer models anchored on tumor MPI data harmonized with experimental results to within an average of 2 °C when MNP content estimated from MPI data is included. Computational studies emphasized the importance of post-injection MNP quantitation and MPI spatial resolution. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.

关键词： Hyperthermia therapy

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Fracture risk assessment from 2D-DXA scan by supervised machine learning modeling

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Osteoporosis and Sarcopenia 2023年第4期9卷 S2-S2页

作者： Heesun Choi Luca Quagliato Yoon-Sok Chung Taeyong Lee Division of Mechanical and Biomedical Engineering Ewha Womans University Republic of Korea Division of Mechanical and Biomedical Engineering Graduate Program in System Health Science and Engineering Ewha Womans University Republic of Korea Ajou University Hospital Republic of Korea

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Room-temperature multiple ligands-tailored SnO_(2) quantum dots endow in situ dual-interface binding for upscaling efficient perovskite photovoltaics with high V_(OC)

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Light(science & Applications) 2021年第12期10卷 2467-2481页

作者： Zhiwei Ren Kuan Liu Hanlin Hu Xuyun Guo Yajun Gao Patrick W.K.Fong Qiong Liang Hua Tang Jiaming Huang Hengkai Zhang Minchao Qin Li Cui Hrisheekesh Thachoth Chandran Dong Shen Ming-Fai Lo Annie Ng Charles Surya Minhua Shao Chun-Sing Lee Xinhui Lu Frédéric Laquai Ye Zhu Gang Li Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Electrical and Computer Engineering Nazarbayev UniversityNur-SultanKazakhstan The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Hoffmann Institute of Advanced Materials Shenzhen Polytechnic7098 Liuxian BoulevardShenzhen 518055China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Physics The Chinese University of Hong KongShatin 999077 Hong KongChina Center of Super-Diamond and Advanced Films(COSDAF) Department of ChemistryCity University of Hong KongHong KongChina

The benchmark tin oxide(SnO_(2))electron transporting layers(ETLs)have enabled remarkable progress in planar perovskite solar cell(PSCs).However,the energy loss is still a challenge due to the lack of“hidden interface”*** report a novel ligand-tailored ultrafine SnO_(2) quantum dots(QDs)via a facile rapid room temperature ***,the ligand-tailored SnO_(2) QDs ETL with multi-functional terminal groups in situ refines the buried interfaces with both the perovskite and transparent electrode via enhanced interface binding and perovskite *** novel ETLs induce synergistic effects of physical and chemical interfacial modulation and preferred perovskite crystallization-directing,delivering reduced interface defects,suppressed non-radiative recombination and elongated charge carrier *** conversion efficiency(PCE)of 23.02%(0.04 cm^(2))and 21.6%(0.98 cm^(2),V_(OC) loss:0.336 V)have been achieved for the blade-coated PSCs(1.54 eV E_(g))with our new ETLs,representing a record for SnO_(2) based blade-coated ***,a substantially enhanced PCE(V_(OC))from 20.4%(1.15 V)to 22.8%(1.24 V,90 mV higher V_(OC),0.04 cm^(2) device)in the blade-coated 1.61 eV PSCs system,via replacing the benchmark commercial colloidal SnO_(2) with our new ETLs.

关键词： perovskite interface quantum

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Enhancing the Electron Pair Approximation with Measurements on Trapped Ion Quantum Computers

arXiv

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arXiv 2023年

作者： Zhao, Luning Goings, Joshua Wang, Qingfeng Shin, Kyujin Kyoung, Woomin Noh, Seunghyo Rhee, Young Min Kim, Kyungmin IonQ Inc College ParkMD20740 United States Chemical Physics Program Institute for Physical Science and Technology University of Maryland College ParkMD20742 United States Materials Research & Engineering Center CTO Division Hyundai Motor Company Uiwang16082 Korea Republic of Department of Chemistry KAIST Daejeon34141 Korea Republic of

The electron pair approximation offers a resource efficient variational quantum eigensolver (VQE) approach for quantum chemistry simulations on quantum computers. With the number of entangling gates scaling quadratically with system size and a constant energy measurement overhead, the orbital optimized unitary pair coupled cluster double (oo-upCCD) ansatz strikes a balance between accuracy and efficiency on today’s quantum computers. However, the electron pair approximation makes the method incapable of producing quantitatively accurate energy predictions. In order to improve the accuracy without increasing the circuit depth, we explore the idea of reduced density matrix (RDM) based second order perturbation theory (PT2) as an energetic correction to electron pair approximation. The new approach takes into account of the broken-pair energy contribution that is missing in pair-correlated electron simulations, while maintaining the computational advantages of oo-upCCD ansatz. In dissociations of N2, Li2O, and chemical reactions such as the unimolecular decomposition of CH2OH+ and the SN2 reaction of CH3I + Br−, the method significantly improves the accuracy of energy prediction. On two generations of the IonQ’s trapped ion quantum computers, Aria and Forte, we find that unlike the VQE energy, the PT2 energy correction is highly noise-resilient. By applying a simple error mitigation approach based on post-selection solely on the VQE energies, the predicted VQE-PT2 energy differences between reactants, transition state, and products are in excellent agreement with noise-free simulators. © 2023, CC BY.

关键词： Trapped ions

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Markerless motion capture: What clinician-scientists need to know right now

JSAMS Plus

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JSAMS Plus 2022年 1卷 100001-100001页

作者： Ito, Naoaki Sigurðsson, Haraldur B. Seymore, Kayla D. Arhos, Elanna K. Buchanan, Thomas S. Snyder-Mackler, Lynn Grävare Silbernagel, Karin Biomechanics and Movement Science Program University of Delaware Newark DE United States Department of Physical Therapy University of Delaware Newark DE United States Department of Physical Therapy University of Iceland Reykjavik Iceland Department of Biomedical Engineering University of Delaware Newark DE United States Mechanical Engineering University of Delaware Newark DE United States

Markerless motion capture (mocap) could be the future of motion analysis. The purpose of this report was to describe our team of clinicians and scientists’ exploration of markerless mocap (Theia 3D) and share data for others to explore (link: https://***/6vh7z/?view_only=c0e00984e94a48f28c8d987a2127339d). Simultaneous mocap was performed using markerless and marker-based systems for walking, squatting, and forward hopping. Segment lengths were more variable between trials using markerless mocap compared to marker-based mocap. Sagittal plane angles were most comparable between systems at the knee joint followed by the ankle and hip. Frontal and transverse plane angles were not comparable between systems. The data collection experience using markerless mocap was simpler, faster, and user friendly. The ease of collection was in part offset by the added data transfer and processing times, and the lack of troubleshooting flexibility. If used selectively with proper understanding of limitations, markerless mocap can be exciting technology to advance the field of motion analysis. © 2022

关键词： 3D modeling Kinematics Lower extremity Markerless motion capture

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Electric Field Emission in GdNiO3 Microflower

SSRN

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SSRN 2024年

作者： Karmakar, Subrata Parey, Vanshree Mistari, Chetan D. Hamid, Md Abdul Emu, Injamamul Hoque Halim, Md Abdul Sanyal, Gopal Chakraborty, Brahmananda More, M.A. Droopad, Ravi Haque, Ariful Electrical Engineering Ingram School of Engineering Texas State University San MarcosTX78666 United States Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Av. Països Catalans 16 Tarragona43007 Spain Department of Physics Savitribai Phule Pune University Maharashtra Pune411007 India Mechanical Metallurgy Division Bhabha Atomic Research Centre Trombay Mumbai400085 India High Pressure and Synchrotron Radiation Physics Division Bhabha Atomic Research Centre Trombay Mumbai400085 India Homi Bhabha National Institute Anushaktinagar Mumbai400094 India Materials Science Engineering & Commercialization Program Texas State University San MarcosTX78666 United States

GdNiO3 microflowers were synthesized by hydrothermal method with unit sizes of about 2.2-3.5 μm and petal sizes of ~75-100 nm. The X-ray diffraction pattern (XRD) and Raman spectra reveal an orthorhombic crystal structure with the space group Pbnm and various Raman active vibrational modes i.e., Ag, B1g, B2g associated with rare earth nickelates. The total density of states (TDOS) was calculated by density functional theory (DFT) study using a hybrid functional (HSE06) and the volume of TDOS near the Fermi level confirms the semiconducting nature of GdNiO3 with band gap ~0.688 eV. The local bulk work function (φ) was estimated theoretically at ~5.35 eV from DFT calculations which is one of the essential parameters for the field enhancement factor (β). Field emission current density (J) vs. applied electric field (E) divulges a low turn-on field (Eto)~4.6 V/μm@1 μA/cm2 and a threshold field (Eth)~5.2 V/μm@10 μA/cm2 respectively. The Fowler-Nordheim (F-N) model was introduced to calculate β ~1637 and long-term field emission current stability was observed experimentally > 4 h at the preset values of current 2 μA and 10 μA, respectively. The easy preparedness, low turn-on field, and long-term current stability without significant decay suggest this material to be an efficient electron field emitting material in the rare-earth nickelates series. © 2024, The Authors. All rights reserved.

关键词： Rare earths

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Effects of water hyacinth fiber size on sound absorption properties of advanced recycled palm oil-based polyurethane foam composite

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Materials Today: Proceedings 2022年 52卷 2409-2413页

作者： Nathapong Sukhawipat Thanathach Yingshataporn-a-nan Tanapat Minanandana Kitchapat Puksuwan Laksana Saengdee Yeampon Nakaramontri Narongrit Sosa Nitinart Saetung Division of Polymer Engineering Technology Department of Mechanical Engineering Technology College of Industrial Technology King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand Sustainable Polymer & Innovative Composite Materials Research Group Department of Chemistry Faculty of Science King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) Klong Luang Pathum Thani 12120 Thailand Division of Physical Science Department of Materials Science and Technology Faculty of Science Prince of Songkla University Songkhla 90110 Thailand

This work aims to study the effects of the size of water hyacinth fiber (WHF) on the properties of a rigid sound absorption material from recycled palm oil-based polyurethane foam (PUF) Polyurethane Foam Compositecomposite. By fixing the NCO index of 100 with the WHF content of 1%wt, the sizes of WHF were varied from 80, 40, and 20 mesh to study the properties of PUF. The compression strength, optical microscopy, and sound absorption coefficient (SAC) of the PUF composite were tested. Reducing the mesh size of WHF from 80 to 20, the compression strength of PUF increased from 0.33 to 0.47 N/mm 2 . PUF with a WHF mesh size of 80 and a SAC value of 0.92 was suitable for sound absorption. Therefore, the PUF derived from both water hyacinth and used palm oil could be used as a promising alternative green material for sound absorption application.

关键词： Recycled palm oil Water hyacinth fiber Sound absorption material Green polyurethane

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3D Printed Biomimetic Composite for Treatment of Osteochondral Defects: A Preliminary Study in Porcine

SSRN

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SSRN 2025年

作者： Eckstein, Kevin N. Liu, Boyuan Schoonraad, Sarah A. Guastaldi, Fernando Pozzi Semeghini Uzcategui, Camila Muralidharan, Archish McLeod, Robert R. Randolph, Mark A. Bryant, Stephanie J. Ferguson, Viginia L. Paul M. Rady Department of Mechanical Engineering University of Colorado at Boulder BoulderCO80309 United States Materials Science and Engineering Program University of Colorado at Boulder BoulderCO80309 United States Division of Oral and Maxillofacial Surgery Department of Surgery Massachusetts General Hospital Harvard School of Dental Medicine Harvard Medical School BostonMA02114 United States Division of Plastic and Reconstructive Surgery Department of Surgery Massachusetts General Hospital Harvard Medical School BostonMA02114 United States Department of Electrical Computer and Energy Engineering University of Colorado at Boulder BoulderCO80309 United States Department of Chemical and Biological Engineering University of Colorado at Boulder BoulderCO80309 United States BioFrontiers Institute University of Colorado at Boulder BoulderCO80309 United States

Osteochondral defects in diarthrodial joints can occur as a result of trauma. When left untreated, the surrounding tissues experience abnormal mechanical loads that can cause further degeneration. Thus, treatment of osteochondral defects requires the ability to support physiological loads and prevent further degeneration of surrounding tissues. Additive manufacturing techniques, such as bio-ink printing, have been explored to structurally reinforce soft scaffolds;however, these methods struggle to accurately print complex designs with small feature sizes (e.g., on the order of ~100 micrometers). In this study, we present a composite osteochondral scaffold with regional stiffness gradients, optimized to mimic the mechanical properties of articular cartilage and limit high strains in the subchondral bone. This scaffold incorporates a load-bearing structure, with ≥ 180 μm diameter truss elements, that is 3D printed via projection micro-stereolithography with a biomimetic soft hydrogel. We hypothesized that incorporating a reinforcing structure with cartilage and bone regions possessing tissue-specific stiffnesses, compared to a soft gel alone, would reduce degradation of native cartilage tissue adjacent to osteochondral defects and promote multi-tissue integration in porcine knees after six weeks. Histological analysis and microcomputed tomography revealed site-specific changes in the surrounding tissue, notably in the adjacent cartilage. mechanical evaluation of adjacent native tissue showed that scaffolds with the 3D printed composite structure resulted in 33% less surrounding cartilage degradation compared to gel-only treatments. Within the defect, the soft gel alone limited mineralization, while the composite supported mineralization but only in its stiffer region. These findings suggest that incorporating a 3D printed reinforcing osteochondral mimetic structure protects the adjacent cartilage, enhances tissue integration, and spatially supports mineralization. © 2

关键词： Bone

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Transient non-Hermitian skin effect

arXiv

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arXiv 2022年

作者： Gu, Zhongming Gao, He Xue, Haoran Li, Jensen Su, Zhongqing Zhu, Jie Institute of Acoustics School of Physics Science and Engineering Tongji University Shanghai200092 China Department of Mechanical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Department of Physics The Hong Kong University of Science and Technology Kowloon Hong Kong

The discovery of non-Hermitian skin effect (NHSE) has opened an exciting direction for unveiling unusual physics and phenomena in non-Hermitian system. Despite notable theoretical breakthroughs, actual observation of NHSE's whole evolvement, however, relies mainly on gain medium to provide amplified mode. It typically impedes the development of simple, robust system. Here, we show that a passive system is fully capable of supporting the observation of the complete evolution picture of NHSE, without the need of any gain medium. With a simple lattice model and acoustic ring resonators, we use complex-frequency excitation to create virtual gain effect, and experimentally demonstrate that exact NHSE can persist in a totally passive system during a quasi-stationary stage. This results in the transient NHSE: passive construction of NHSE in a short time window. Despite the general energy decay, the localization character of skin modes can still be clearly witnessed and successfully exploited. Our findings unveil the importance of excitation in realizing NHSE and paves the way towards studying the peculiar features of non-Hermitian physics with diverse passive platforms. Copyright © 2022, The Authors. All rights reserved.

关键词： Acoustic resonators

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Impact of occupational noise exposure on the hearing level in hospital staffs: a longitudinal study

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Environmental science and Pollution Research 2024年第16期31卷 24129-24138页

作者： Wang, Tang-Chuan Yu, You-Cheng Hsu, Alan Lin, Jia-Yi Tsou, Yung-An Liu, Chiu-Shong Chuang, Kai-Jen Pan, Wen-Chi Yang, Chin-An Hu, Sung-Lin Ho, Chien-Yi Chen, Tzu-Liang Lin, Chia-Der Pai, Pei-Ying Chang, Ta-Yuan Department of Public Health College of Public Health China Medical University No. 100 Sec. 1 Jingmao Rd. Beitun Dist. Taichung406040 Taiwan Department of Otolaryngology – Head and Neck Surgery China Medical University Hsinchu Hospital No. 199 Section 1Xinglong Road Hsinchu County Zhubei City302056 Taiwan School of Medicine College of Medicine China Medical University No. 100 Sec. 1 Jingmao Rd. Beitun Dist. Taichung406040 Taiwan Master Program for Biomedical Engineering College of Biomedical Engineering China Medical University No. 100 Sec. 1 Jingmao Rd. Beitun Dist. Taichung406040 Taiwan The Ph.D. Program for Medical Engineering and Rehabilitation Science College of Biomedical Engineering China Medical University No. 100 Sec. 1 Jingmao Rd. Beitun Dist. Taichung406040 Taiwan Department of Occupational Safety and Health College of Public Health China Medical University No. 100 Section 1Jingmao Road Beitun District Taichung City406040 Taiwan Department of Public Health School of Medicine College of Medicine Taipei Medical University No.250 Wuxing St. Xinyi Dist. Taipei City110 Taiwan Institute of Environmental and Occupational Health Sciences National Yang Ming Chiao Tung University No. 155 Sec. 2 Linong St. Beitou Dist. Taipei City112304 Taiwan Department of Biomedical Imaging and Radiological Science China Medical University No. 100 Sec. 1 Jingmao Rd. Beitun Dist. Taichung406040 Taiwan Division of Family Medicine Physical Examination Center Department of Medical Research China Medical University Hsinchu Hospital No. 199 Section 1Xinglong Road Hsinchu County Zhubei City302 Taiwan

The study aimed to evaluate the impact of occupational noise on hearing loss among healthcare workers using audiometry. A longitudinal study was conducted with a six-month follow-up period in a hospital with 21 participants, divided into high-noise-exposure (HNE) and low-noise-exposure (LNE) groups. Mean noise levels were higher in the HNE group (70.4 ± 4.5 dBA), and hearing loss was measured using pure-tone audiometry at baseline and follow-up. The HNE group had significantly higher mean threshold levels at frequencies of 0.25 kHz, 0.5 kHz, 4.0 kHz, and an average of 0.5, 1, 2, and 4 kHz (all p-values © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Audition

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