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Circuits, Power and Intelligent Systems (CCPIS), International Conference on

作者： Bikash ranjan Behera Nibash Kumar Sahu Sanjeev Kumar Mishra Department of Electronics and Communucation Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai India Department of Instrumentation and Electronics Engineering Odisha University of Technology and Research (Formerly College of Engineering and Technology) Bhubaneswar India Department of Electronics and Communication Engineering Advanced RF and Microwave Lab International Institute of Information Technology Bhubaneswar India

In this research, a proximity coupled rectangular microstrip antenna for the rF energy harvesting application is reported here. Here, the proposed antenna belongs to category of printed antenna, where, rectangular shaped patch is utilized as radiator. It is fed by the 50-Ω proximity coupled microstrip line, in between the Fr-4 (ε r1 =4.4) and rogers rT duroid 5880 (ε r2 =2.2) substrate, having the overall dimensions of 60 (L SUB ) × 80 (W SUB ) × 2.4 (h SUB-1 = h SUB-2 ) mm 3 . Then, parasitic patches & intuitive ground plane shaping method is incorporated out, for broadening the impedance bandwidth. The parameters such as impedance bandwidth, gain, efficiency, radiation pattern, and surface current distribution are reported & analyzed by using the EM solver CST microwave studio. It exhibits an impedance bandwidth of 277 MHz, a realized gain of 5.6 dB with antenna efficiency of 92% at a 2.4 GHz ISM Frequency Band (2.4-2.484 GHz). With the obtained results, the proposed antenna is a best candidate for ISM and can be even extended for the rF energy harvesting application.

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Two-dimensional Metal-Organic Frameworks/Epoxy Composite Coatings with Superior O2/H2O resistance for Anticorrosion Applications

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ACS applied materials & interfaces 2024年第31期16卷 41421-41434页

作者： Hao-Hsuan Hsia You-Liang Chen Yu-Ting Tai Hong-Kang Tian Chung-Wei Kung Wei-ren Liu Department of Chemical Engineering R&D Center for Membrane Technology Research Center for Circular Economy Chung Yuan Christian University Taoyuan 32023 Taiwan. Department of Graduate Institude of Applied Science and Technology National Taiwan University of Science and Technology Taipei City 106335 Taiwan. Department of Chemical Engineering National Cheng Kung University Tainan City 70101 Taiwan. Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan 70101 Taiwan. Hierarchical Green-Energy Materials (Hi-GEM) Research Center National Cheng Kung University Tainan 70101 Taiwan.

Corrosion protection technology plays a crucial role in preserving infrastructure, ensuring safety and reliability, and promoting long-term sustainability. In this study, we combined experiments and various analyses to investigate the mechanism of corrosion occurring on the epoxy-based anticorrosive coating containing the additive of two-dimensional (2d) and water-stable zirconium-based metalorganic frameworks (Zr-MOFs). By using benzoic acid as the modulator for the growth of the MOF, a 2d MOF constructed from hexazirconium clusters and BTB linkers (BTB = 1,3,5-tri(4-carboxyphenyl)benzene) with coordinated benzoate (BA-ZrBTB) can be synthesized. By coating the BA-ZrBTB/epoxy composite film (BA-ZrBTB/EP) on the surface of cold-rolled steel (CrS), we found the lowest coating roughness (rMS) of BA-ZrBTB/EP is 2.83 nm with the highest water contact angle as 99.8°, which represents the hydrophobic coating surface. Notably, the corrosion rate of the BA-ZrBTB/EP coating is 2.28 × 10 mpy, which is 4 orders of magnitude lower than that of the CrS substrate. Moreover, the energy barrier for oxygen diffusion through BA-ZrBTB/EP coating is larger than that for epoxy coating (EP), indicating improved oxygen resistance for adding 2d Zr-MOFs as the additive. These results underscore the high efficiency and potential of BA-ZrBTB as a highly promising agent for corrosion prevention in various commercial applications. Furthermore, this study represents the first instance of applying 2d Zr-MOF materials in anticorrosion applications, opening up new possibilities for advanced corrosion-resistant coatings.

关键词： 2d structure Zr-based MOFs anticorrosion density functional theory epoxy hydrophobic

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Production and in vitro Evaluation of Novel Fe-35Mn-0.15N and Zn7Ag-Based Biodegradable Metallic Meshes for Pelvic Floor Prolapse reconstruction

SSRN

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SSrN 2024年

作者： Mardina, Zahrina Venezuela, Jeffrey Gopalakrishnan, Aswathi Houshyar, Shadi Ng, Chi-Ho Maher, Christopher Shi, Zhiming dargusch, Matthew S. Liu, Ming Bermingham, Michael White, Justin Cooper Padhye, rajiv Atrens, Andrej St. LuciaQLD4072 Australia BSD South Tangerang15345 Indonesia School of Chemical Engineering The University of Queensland St. LuciaQLD4072 Australia School of Engineering RMIT University Melbourne3000 Australia QLD4029 Australia Department Urogynaecology Wesley Hospital QLD4066 Australia Faculty of Medicine The University of Queensland HerstonQLD4006 Australia China Science Lab Shanghai Pudong201206 China R&D China Science Lab China Australia

Pelvic organ prolapse (POP) is a herniation of pelvic organs such as the uterus, rectum, and bladder through the vaginal opening due to the weakening of supporting muscle and fascia. POP affects more than 10% of women and prevents the performance of everyday activities. The standard treatment for POP was the implantation of surgical mesh to support the weakened tissues. However, pelvic mesh was banned in 2013 due to reported complications such as bleeding and tissue rupture. This paper produced a novel alternative to pelvic mesh based on biodegradable metals (BM). The BM mesh supports the tissue while slowly degrading, facilitating healing of the native tissue. The mesh is expected to fully degrade after two and half years of service, obviating long-term complications. The two BM meshes consisting of (1) the iron-manganese-nitrogen (Fe35Mn-0.15N) alloy and (2) the zinc-silver alloy (Zn7Ag). Both meshes were weft-knitted using commercial 0.08 mm wires. Tensile tests indicated that the stiffness of the BM meshes were lower than the Prolene honeycomb and Ultrapro woven meshes. In addition, different cutting directions produced different stiffness, which could accommodate softer organs, such as the uterus and the bladder, and stiffer organs, such as a the prolapsed vaginal wall. The two months immersion test resulted in a corrosion rate of 0.023 mm/year for the Fe-35Mn-0.15N and 0.027 mm/year for the Zn7Ag mesh. The Zn7Ag mesh corrosion rate was higher than that the 0.01 mm/year corrosion rate of Zn7Ag wires. Micro CT and SEM indicated localized corrosion at (i) interlocking locations attributed to crevice corrosion and (ii) U-bend locations of the mesh attributed to stress-induced corrosion. Similarly, EdX indicated thicker corrosion product deposition at both locations. The Fe-35Mn-0.15N remained intact after two months of immersion, while Zn7Ag lost structural integrity attributed to strain softening and accelerated corrosion by micro galvanic interaction. In vitro c

关键词： Stiffness

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Multifunctional Phra Phrom-like Graphene-Based membrane for Environmental remediation and resources regeneration

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Advanced Functional Materials 2024年第7期34卷

作者： Huang, Tsung-Han Tian, Xin-Yuan Chen, Yi-Yun Widakdo, Januar Austria, Hannah Faye M. Setiawan, Owen Subrahmanya, T.M. Hung, Wei-Song Wang, da-Ming Chang, Ching-Yuan Wang, Chih-Feng Hu, Chien-Chieh Lin, Chia-Her Lai, Yu-Lun Lee, Kueir-rarn Lai, Juin-Yih Graduate Institute of Applied Science and Technology Advanced Membrane Materials Research Center National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Materials and Textiles Asia Eastern University of Science and Technology Taipei22061 Taiwan Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok16424 Indonesia Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Mechanical Engineering National Taipei University of Technology Taipei10617 Taiwan Institute of Advanced Semiconductor Packaging and Testing National Sun Yat-sen University Kaohsiung804201 Taiwan Department of Chemistry National Taiwan Normal University Taipei11677 Taiwan Green Energy and Environment Research Laboratories Industrial Technology Research Institute Hsinchu31057 Taiwan R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan University Chung Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan320315 Taiwan

Water and energy shortages are interdependent major worldwide issues that cannot be disregarded. In this work, graphene and BaTiO3 are used to synergistically facilitate the self-assembly of the β-phase that is known to induce the piezoelectric properties of the polyvinylidene fluoride (PVdF). This leads to a PVdF/graphene-BaTiO3 nanocomposite with a unique capability of integrating Phra Phrom-like four functions into one single asymmetric membrane: i) solar evaporation, ii) power generation, iii) piezo-photodegradation, and iv) self-cleaning/monitoring for environmental remediation and resources regeneration. The high heat accumulation capability and piezoelectric performance of the membrane enable it to simultaneously achieve a water production rate of 0.99 kgm−2h−1, in compliance with WHO standards, and a maximum power output of 5.73 Wm−2 in simulated natural environments. Upon subjecting the membranes to environmental cleaning, they not only show a 93% dye degradation rate due to the synergistic effect of piezoelectricity and photocatalysis but also resolve the membrane fouling issue, exhibiting ≈200% resistance change compared to the static state. The successful integration of these four functions into one membrane shows the great potential of this work toward a more sustainable and viable water and energy production approach. © 2023 Wiley-VCH GmbH.

关键词： Graphene

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Preparation of 3d-printed gastric models with biomimetic mechanical, topographical and fluid dynamic properties

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Hsu, Yu-Tung Lee, Shiao-Pieng Li, Chung-Hsing Ho, Ming-Hua Kao, Chen-Yu Department of Pharmacy National Taiwan University Taiwan Taipei Taiwan Division of Oral and Maxillofacial Surgery Department of Dentistry Tri-Service General Hospital Taiwan Taipei Taiwan School of Dentistry National Defense Medical Center Taipei11490 Taiwan Department of Orthodontics and Pediatrics Dentistry Tri-Service General Hospital Taiwan Taipei Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taiwan Taipei Taiwan R&D Center for Membrane Technology National Taiwan University of Science and Technology Taiwan Taipei Taiwan Graduate Institute of Biomedical Engineering National Taiwan University of Science and Technology Taiwan Taipei Taiwan Biomedical Engineering Research Center National Defense Medical Center Taipei Taiwan

Background: The in vitro biomimetic digestive system simulating the digestive tract environment of animals and humans is necessary for research on drug development, food ingestion, and digestion processes. However, most current digestive models do not present the surface structures of a human stomach, the mechanical properties and fluid dynamics at the same time. In this study, a gastric model was fabricated by photo-curing 3d printing, where the mechanical strength, topographical cues, surface chemistry, and fluid dynamics were biocompatible. Methods: A gastric simulation system was assembled with soft and flexible photoresin having biomimetic mechanical strength. The gastric rugae were then replicated by 3d printing on the surface of gastric models, followed by designing the fluid dynamic based on the flow of in vivo gastric juice. due to the combination of gastric flexibility, rugae morphology, fluid dynamics, and gastric juice emptying behavior, a highly biomimetic gastric model was created. The model was examined with antibiotic and anticancer drugs, where H. pylori and gastric cancer cells, MKN-45, were cultured on model surfaces. Significant findings: The survival rates of H. pylori and MKN-45 on 2d/3d models were systematically evaluated. The cultured bacteria and cells presented more biomimetic responses to drugs, compared to conventional in vitro tests for gastric diseases. The overestimated therapeutic activity in convectional 2d models was modified using the gastric model developed in this research. © 2024

关键词： diseases

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Investigation of space group effects of High-Voltage spinel LiNi0.5Mn1.5O4: Unveiling the influences of fluorinate benzimidazole salt additive

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Chemical engineering Journal 2024年 494卷

作者： Khotimah, Chusnul Yuwono, rio Akbar Wang, Fu-Ming Yang, Chun-Chen Wu, Nae-Lih dewi Sundari, Citra deliana Imawan, Arif Cahyo Chang, Ching-Kai Hsu, Ping-Hsuan Huang, Pin-Cheng Liu, Guan-Yi Tsai, Yi-de Haw, Shu-Chih Iskandar, Ferry Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei Taiwan Graduate Institute of Energy and Sustainability Technology National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Taiwan Department of Chemical Engineering Ming-Chi University of Technology New Taipei City Taiwan Department of Chemical Engineering National Taiwan University Taipei Taiwan Department of Chemistry Education UIN Sunan Gunung Djati Bandung Bandung Indonesia National Synchrotron Radiation Research Center Hsinchu Taiwan Research Center of Nanoscience and Nanotechnology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Spinel LiNi0.5Mn1.5O4 (LNMO) is one of the attractive cathodes due to several advantages such as Co-free for low cost and high operating voltage (∼5 V). Normally, there are Fd3¯m and P4332 space group types of LNMOs. However, both LNMOs suffer phase segregation at intragranular side which affects the lithium diffusion pathway and structural degradation during cycles. On the other hand, Jahn-Teller distortion on Mn3+ as well as HF effects from electrolyte oxidation at high voltage window triggered lead Mn dissolution from LNMO that causes performance fade. In this work, a new salt is developed, lithium 1-fluoro benzimidazole (Li-1FB) for LNMO with two different space groups. Ex-situ Xrd results show the Li-1FB postpones the formation of intermediate phase transition on both LNMOs at different states of charge. In addition, 1H NMr analysis reveals the Li-1FB salt can prevent HF formation by the N-Li functional group of imidazole ring thus inhibits Mn dissolution on both LNMOs after cycling. Furthermore, the Li-1FB salt is suitable to improve cycle performance of both LNMOs in half-cell (Li metal as anode) and full cell (graphite as anode) applications. This new salt provides dramatic improvements, and it is suitable for further high-energy applications. © 2024

关键词： Lithium

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Ultrahigh-power all binder-free hybrid supercapacitors based on single-crystal hexagonal nanorods of molecular sieve VSB-5 hierarchical electrodes

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Journal of the Taiwan Institute of Chemical Engineers 2024年 154卷

作者： Yeh, Po-Hung Huang, Kai-Chen Mathankumar, Mahendran Wei, Sung-Yen Anuratha, Krishnan Shanmugam Kuo, Chun-Yi Su, Chia-Hung Lin, Jeng-Yu Hsieh, Chien-Kuo Department of Materials Engineering Center for Plasma and Thin Film Technologies Ming Chi University of Technology New Taipei City24301 Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung City407224 Taiwan R&D Lab SulfurScience Technology Co. Ltd. New Taipei City24301 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Department of Engineering and system science National Tsing Hua University Hsinchu300044 Taiwan

Background: Molecular sieve Versailles Santa Barbara-5 (VSB-5) is a highly porous nanomaterial for electrochemical supercapacitor. Methods: A facile hydrothermal method is used to directly synthesize VSB-5 nanorods onto the Nickel Foam (NF). Significant findings: In this work, one-dimensional single-crystal hydrogen nickel phosphate hydroxide hydrate (Ni20[(OH)12(H2O)6][(HPO4)8(PO4)4]·12H2O, also denotes as VSB-5, hexagonal nanorods arrays are successfully synthesized on NF via a hydrothermal method, and applied them as positive electrodes for hybrid supercapacitor (HSC). The resultant open framework of VSB-5 with unique nanochannels provides the synchronous advantages of a large surface area with numerous active sites for enhancing faradic redox reactions and abundant pathways for promoting electrolyte ions diffusion, thus leading to excellent energy storage behavior. Furthermore, the HSC is fabricated by paring the direct growth of carbon nanotubes (CNTs) on NF as the electrical-double-layer-capacitor negative electrode. Both the VSB-5/NF and CNTs/NF electrodes are binder-free hierarchical structures, owning the lowest interfacial resistivities between active materials and current collects, avoiding the aggregation issues to allow the facile diffusion of electrolyte for maximally utilizing the surface area. The resultant all binder-free VSB-5/NF//CNTs/NF HSC shows remarkable electrochemical performance, which delivers a maximum energy density of 46.9 W h kg−1 at a power density of 1225 W kg−1 with excellent capacity retention of 98.18% after 10,000 cycles. © 2023

关键词： Molecular sieves

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Generalizing Segmentation Foundation Model Under Sim-to-real domain-shift for Guidewire Segmentation in X-ray Fluoroscopy

arXiv

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arXiv 2024年

作者： Wen, Yuxuan roussinova, Evgenia Brina, Olivier Machi, Paolo Bouri, Mohamed Rehassist Group EPFL Lausanne Switzerland Department of Electrical Engineering and Computer Science University of Cincinnati OH45221 United States College of Computer Science Chongqing University Chongqing400044 China EPFL Lausanne Switzerland Department of Interventional Neuroradiology Geneva University Hospital Geneva Switzerland Brain Endovascular Therapeutics R&D Lab Campus Biotech Geneva Switzerland EPFL Lausanne Switzerland

Guidewire segmentation during endovascular interventions holds the potential to significantly enhance procedural accuracy, improving visualization and providing critical feedback that can support both physicians and robotic systems in navigating complex vascular pathways. Unlike supervised segmentation networks, which need many expensive expert-annotated labels, sim-to-real domain adaptation approaches utilize synthetic data from simulations, offering a cost-effective solution. The success of models like Segment-Anything (SAM) has driven advancements in image segmentation foundation models with strong zero/few-shot generalization through prompt engineering. However, they struggle with medical images like X-ray fluoroscopy and the domain-shifts of the data. Given the challenges of acquiring annotation and the accessibility of labeled simulation data, we propose a sim-to-real domain adaption framework with a coarse-to-fine strategy to adapt SAM to X-ray fluoroscopy guidewire segmentation without any annotation on the target domain. We first generate the pseudo-labels by utilizing a simple source image style transfer technique that preserves the guidewire structure. Then, we develop a weakly supervised self-training architecture to fine-tune an end-to-end student SAM with the coarse labels by imposing consistency regularization and supervision from the teacher SAM network. We validate the effectiveness of the proposed method on a publicly available Cardiac dataset and an in-house Neurovascular dataset, where our method surpasses both pre-trained SAM and many state-of-the-art domain adaptation techniques by a large margin. Our code will be made public on GitHub soon. Copyright © 2024, The Authors. All rights reserved.

关键词： Image segmentation

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Mortar: Morphing the Bit Level Sparsity for General Purpose deep Learning Acceleration

Mortar: Morphing the Bit Level Sparsity for General Purpose ...

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Asia and South Pacific design Automation Conference

作者： Yunhung Gao Hongyan Li Kevin Zhang Xueru Yu Hang Lu School of Electronics Engineering and Computer Science Peking University Beijing China State Key Lab of Computer Architecture Institute of Computing Technology CAS University of Chinese Academy of Sciences Beijing China Shanghai Integrated Circuits R&D Center Co. Ltd Shanghai China

Vanilla deep Neural Networks (dNN) after training are represented with native floating-point 32 (fp32) weights. We observe that the bit-level sparsity of these weights is very abundant in the mantissa and can be directly exploited to speed up model inference. In this paper, we propose Mortar, an off-line/on-line collaborated approach for fp32 dNN acceleration, which includes two parts: first, an off-line bit sparsification algorithm to construct the target formulation by “mantissa morphing”, which maintains higher model accuracy while increasing bit-level sparsity; second, the associating hardware accelerator architecture to speed up the on-line fp32 inference through manipulating the enlarged bit sparsity. We highlight the following results by evaluating various deep learning tasks, including image classification, object detection, video understanding, video & image super-resolution, etc.: We (1) increase bit-level sparsity up to 1.28~2.51x with only a negligible -0.09~0.23% accuracy loss, (2) maintain on average 3.55% higher model accuracy while increasing more bit-level sparsity than the baseline, (3)and our hardware accelerator outperforms up to 4.8x over the baseline, with an area of 0.031 mm 2 and power of 68.58mW.

关键词： deep learning Training Mortar Superresolution Software algorithms Inference algorithms Software

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Enhanced tumor targeting with near-infrared light-activated indocyanine green encapsulated in covalent organic framework for combined photodynamic therapy (PdT) and photothermal therapy (PTT)

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dyes and Pigments 2024年 221卷

作者： Thankachan, darieo Anbazhagan, rajeshkumar Tsai, Hsieh Chih dinh, Van Thi Thuy Gebrie, Hailemichael Tegenu Kitaw, Sintayehu Leshe Ahmed, Yohannis Wondwosen Anley, Beyadgalem Endawoke Liao, Yu-Shu Chen, Wei-Liang Chen, Jem-Kun Department of Materials Science and Engineering National Taiwan University of Science and Technology 43 Sec. 4 Keelung Road Taipei106 Taiwan Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei106 Taiwan R&D Centre for Membrane Technology Chung Yuan University Taoyuan320 Taiwan Division of Gastroenterology and Hepatology Department of Internal Medicine Chung Shan Medical University Hospital Taichung402 Taiwan Department of Chemistry College of Natural and Computational Sciences University of Gondar P.O. Box 196 Gondar Ethiopia

Covalent organic framework (COF), a new emerging class of crystalline porous polymeric networks with reversible covalent bonds are a better smart material in Nano medicine in this regard. 1,3,5-Triformylbenzene (TFB) and 2,5-Bis(methylsulfonyl)-1,4-diaminobenzene (BMSdAB) are used to develop a uniform shaped covalent organic framework at room temperature (rT-USCOF). In order to achieve the PTT and PdT effect in rT-USCOF, near infrared photosensitizer, photothermal and fluorescence agent, indocyanine green (ICG) was encapsulated. Moreover, enhanced loading content of ICG in I rT-USCOF to produce II rT-USCOF followed by stabilize with hyaluronic acid designed in order to reduce drug leakage and increase carrier stability. The II rT-USCOF-HA exhibits an increased encapsulation efficiency of 57.75% and a drug loading capacity of 53.59%. The developed system shows an 80% ICG release upon exposure to NIr 808-laser in acidic pH relative to the one without light irradiation proved the effective structural changes under light cause drug release. The newly developed II rT-USCOF-HA shows excellent biocompatibility against NIH 3T3 cell lines and CT2A cell lines under dark. Whereas, upon irradiation with NIr 808 nm laser, the system kills more than 70% of the cells and cellular uptake studies also proved the same. Finally, flow cytometry analysis confirmed, the II-rT-USCOF-HA treated with CT2A cell lines shows an early apoptosis cell population of 1.95%, a late apoptosis rate of 1.24% and a necrotic cell death of 4.77%, which are significantly greater than the free ICG treated groups. The singlet oxygen production followed by thermal ablation of tumor cells by the developed system further demonstrates its efficacy as a PdT/PTT probe. © 2023 Elsevier Ltd

关键词： Photodynamic therapy

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