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SSrN 2023年

作者： Tong, Yi-Hao Wu, Yu-Zhe Xu, Zhen-Liang Luo, Li-Han Jia, rui Han, rui Xu, Sun-Jie State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology Shanghai200237 China School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China Shanghai Electronic Chemicals Innovation Institute East China University of Science and Technology Shanghai200237 China

Nowadays, loose nanofiltration (LNF) membranes with effective filtration performance toward textile wastewater have drawn intensive attention. In this work, a high-performance LNF membrane was prepared via fast co-deposition of bio-inspired TA-based hydrophilic coating with in-situ hydrolysis of tetra butyl titanate (TBT) on polyethersulfone (PES) substrate. Various additives containing amino acid (L(+)-Arginine) and silane coupling agent (KH792) were mixed in the coating solution and researched their synergistic effects during membrane preparation. In-situ growth of TiO2 and co-deposition of TA-based coating endowed the LNF membrane with a uniformly rough hydrophilic surface. Therefore, the optimal LNF membrane showed a significantly high pure water permeability (92.9 L·m-2·h-1·bar-1) with high rejection (>99.0 %) in treating negatively charged dyes including Eriochrome Black T, Congo red, Chlorazol Black T, and Coomassie Brilliant Blue G. Meanwhile, low rejections for inorganic salts (Na2SO4: 7.9 %, NaCl: 2.5 %, MgCl2: 2.8%, MgSO4: 7.3%) were reached, and it kept distinguished separation performance in dealing with highly saline dye wastewater (containing 50 g·L-1 NaCl and Na2SO4, respectively). Beyond that, the membrane had excellent antifouling properties with low flux decline of multiple model pollutants and long-term stability during separation dye/salt mixture, which revealed the LNF membrane prepared promising potential in actual textile wastewater treatment. © 2023, The Authors. All rights reserved.

关键词： Coatings

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Evaluation of a Speech Jammer Prototype Using Ultrasonic Signals

Evaluation of a Speech Jammer Prototype Using Ultrasonic Sig...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Kazuhiro Kondo Hayato Yamada Noriyuki Hayasaka Graduate School of Science and Engineering Yamagata University Yonezawa Yamagata Japan Faculty of Engineering Yamagata University Yonezawa Yamagata Japan JAIST Panasonic Syst. Net. R&D Lab.

ISBN: (数字)9798350355079

ISBN: (纸本)9798350355086

We evaluated the speech jamming capability of a jammer prototype using ultrasonic signals. The prototype outputs a modulated ultrasonic signal to jam the recording of conversational speech on a hidden recording device. The ultrasonic signal is demodulated as noise at the recorder due to the nonlinearity of the analog front-end circuitry of the device but is inaudible to the human ear. The prototype reduced the intelligibility of recorded speech to well below 20% in all directions surrounding the prototype, proving its effectiveness as a jammer.

关键词： Ultrasonic transducers Loudspeakers Noise Prototypes Modulation Ear Acoustics recording Jamming Consumer electronics

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Investigating formate tolerance mechanisms in Saccharomyces cerevisiae and its application

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Green Carbon 2023年第1期1卷 65-74页

作者： Kai Wang Yining Liu Zhuoheng Wu Yilu Wu Haoran Bi Yanhui Liu Meng Wang Biqiang Chen Jens Nielsen Zihe Liu Tianwei Tan National Energy R&D Center for Biorefnery Beijing Key Lab of BioprocessCollege of Life Science and TechnologyBeijing Advanced Innovation Center for Soft MatterScience and EngineeringBeijing University of Chemical TechnologyNo.15 North 3rd Ring Rd East100029 BeijingPR China Department of Biology and Biological Engineering Chalmers University of TechnologySE41296 GothenburgSweden

Current global energy and environmental crisis have spurred efforts towards developing sustainable biotechnological solutions,such as utilizing CO_(2) and its derivatives as raw *** is an attractive onecarbon source due to its high solubility and low reduction ***,the regulatory mechanism of formate metabolism in yeast remains largely *** study employed adaptive laboratory evolution(ALE)to improve formate tolerance in Saccharomyces cerevisiae and characterized the underlying molecular *** evolved strain was applied to produce free fatty acids(FFAs)under high concentration of formate with glucose *** results showed that the evolved strain achieved a FFAs titer of 250 mg/***,this study sheds light on the regulatory mechanism of formate tolerance and provides a platform for future studies under high concentrations of formate.

关键词： Formate tolerance Adaptive laboratory evolution Saccharomyces cerevisiae Free fatty acids

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A study on photocatalytic Janus membrane reactor for direct conversion of low concentration carbon dioxide in air to methane: Effects of combination of two-dimensional carbon nanosheets

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Chemical engineering Journal 2023年 478卷

作者： Hu, Chien-Chieh Chen, Ya-Chiao Gebrie Ajebe, Eyasu Tsai, Meng-Che Hung, Wei-Song Tsai, Hsieh-Chih 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 NanoElectrochemistry Laboratory Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Chungli32003 Taiwan

Large CO2 emissions cause the greenhouse effect, which threatens human survival. directly converting CO2 in the air into energy and valuable resources is the most effective way to address the greenhouse effect. Currently, the main problem with CO2 conversion is the poor conversion efficiency owing to low CO2 concentrations in the air. In this study, a Janus membrane with the functions of concentrating CO2 (gas separation layer) and photocatalytic reaction (photocatalytic reaction layer) was fabricated. The Janus membrane directly converted extremely low concentrations of CO2 in the air into CH4. Amine-functionalized graphene oxide was added to regulate the CO2 conversion efficiency and the structure of the gas separation layer. Graphene was added to the photocatalytic reaction layer to suppress electron-hole recombination and increase the probability of excited electrons colliding with CO2. The experimental results showed that the modification of the gas separation layer or the photocatalytic reaction layer effectively increased the CH4 yield of the Janus membrane. By maintaining a balance between the selectivity and permeability coefficients of the gas separation layer, the highest methane yield (8.9 ppm) was obtained. The CH4 yield of the Janus membrane was further improved (8.9 ppm to 11.1 ppm) by modifying the photocatalytic reaction layer with graphene. This study proposes a feasible method for improving the efficiency of the Janus membrane for converting low-concentration CO2 in air to CH4. © 2023 Elsevier B.V.

关键词： Titanium dioxide

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Orthogonal Polarized Omnidirectional Antenna Composed of double-Shell Halo Antenna and dipole Antenna

Orthogonal Polarized Omnidirectional Antenna Composed of Dou...

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International Symposium on Antennas and Propagation (ISAP)

作者： Tomokazu Mizutani Hiroshi Hashiguchi Naobumi Michishita Hiroshi Sato Yoshio Koyanagi Hisashi Morishita Graduate School of Science and Engineering National Defense Academy Yokosuka Japan Panasonic System Networks R&D Lab. Tuzuki Yokohama Japan

This paper presents, compact wideband orthogonal polarized omnidirectional antenna. The proposed antenna is the combination of a Halo antenna with double-shell structure and a dipole antenna. The antenna characteristics are clarified by the simulation. To improve the directivity deviation between both polarizations, this antenna is loaded with two short elements on the opposite side of the aperture of the Halo antenna and parasitic element so as not to contact each other. As a result of the simulation, the characteristics of the proposed antenna are that the relative bandwidth is 9.0%, and the antenna height and diameter are 0.46λ 0 and 0.14λ 0 (λ 0 the wavelength of the center operational frequency), respectively.

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Lamellar Structured Go-Melamine Nanocomposite membranes with Varying d-Spacing for Efficient Organic Solvent Nanofiltration (Osn)

SSRN

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SSrN 2023年

作者： Hung, Wei-Song Abebe, Shalligito Habetamu Subrahmanya, T.M. Austria, Hannah Faye M. Nayak, Smrutiranjan Setiawan, Owen Huang, Tsung-Han Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced membrane materials research center Graduate Institute of Applied science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

There is a lot of research being done on GO lamellar 2d membranes for separating organic solvents and dyes. These membranes are highly sought-after due to their exceptional characteristics. However, existing challenges include inadequate solvent permeability and limited dye rejection capacity due to swelling of membranes. In this study, we proposed a novel technique that employs low-pressure assisted filtration to fabricate nanocomposite membranes using GO and melamine. remarkably, these composite membranes exhibited outstanding separation performance for dyes (≥99.06 %) in organic solvents, regardless of their positive or negative charges or when present in mixtures. The optimum GO-M0.02 nanocomposite membrane exhibits impressive organic solvent flux, attaining a value as high as 50.8 L/m2h (acetone), which is 6.57 times greater than that of the pure GO membrane. Furthermore, these GO-Melamine nanocomposite membranes showed excellent durability against both common and harsh organic solvents, and the flux of solvents through the GO-M0.02 nanocomposite membrane remained almost unchanged even after being immersed in methanol for up to one week. Additionally, the membrane exhibited consistent solvent flux and rejection rates for methyl green during continuous filtration. These results highlight the exceptional stability and immense potential of GO-melamine nanocomposite membranes for real organic solvent nanofiltration. © 2023, The Authors. All rights reserved.

关键词： Nanofiltration

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Portable gait analysis sensor model for Parkinson's disease

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Materials Today: Proceedings 2022年 63卷 653-662页

作者： Piromalis, dimitrios Kounelis, Marios Kolovos, dimitrios P. Kokkotis, Christos Tsatalas, Themistoklis Bellis, George Tsaopoulos, dimitrios Giakas, Giannis Chronakis, Antonis Koutsouraki, Eleni Tsotsolas, Nikos randhawa, Princy Patel, Akshet Industrial Design and Production Engineering University of West Attica Egaleo Greece R&D Dept Pan Antistixis SA Industrial Informatics Engineer INNOESYS P.C. Egaleo Greece Biomechanical Solutions Karditsa Greece Department of Physical Education & Sport Science University of Thessaly Trikala Greece Institute for Bioeconomy & Agri-Technology Center for Research and Technology Hellas Volos Greece R&D Dept E. Koutsouraki & SIA E.E - Knowledge Brokers Athens Greece DigiT-DSS Lab University of West Attica Egaleo Greece Department of Mechatronics Engineering Manipal University Jaipur Jaipur India

As part of a research project, a small gait analysis device is being developed that will be used outside of home by the patients themselves. Its main purpose will be to record accurate gait measurements in patients with Parkinson's disease and proceed with in-depth analysis of the gait characteristics. A key feature of the device will be its small size, which creates specific requirements in terms of device consumption restrictions due to the small size of the battery and the need for autonomous operation for more than ten hours. This research work describes, on the one hand, the firmware of the device with an emphasis on the functions that will be implemented;and, on the other, the device software which will support the process that will be adopted for reading and processing data from the devices placed on patients' feet to record the gait characteristics of patients on a continuous basis. Using these computational approaches, we developed and carried out an experiment with a 1.60 m tall experimental female subject. We strapped a device to the subject's right ankle and instructed her to take five steps with her right foot, turn 180 degrees, and repeat with the same foot. © 2022

关键词： Firmware

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Self-surface heating membrane distillation for sustainable production of freshwater: A state of the art overview

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Progress in Materials science 2024年 145卷

作者： Subrahmanya, T.M. Austria, Hannah Faye M. Chen, Yi-Yun Setiawan, Owen Widakdo, Januar Kurkuri, Mahaveer d. Hung, Wei-Song Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok16424 Indonesia Jain Global Campus Karnataka Bengaluru562112 India R&D Center for Membrane Technology Chung Yuan University Chung-Li 32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Shortage of freshwater is a global challenge related to population growth, changes in climate conditions and industrial and agricultural needs. Thus, sustainable freshwater production through desalination and wastewater treatment is essential for various human purposes. membrane distillation (Md) is a recent thermal driven membrane based purification technology with capability to eliminate the limitations of traditional desalination technologies by a synergistic exploitation of the nexus between water and energy. Though Md is recognized as an ecofriendly technology, input heat energy utilization and its efficient management remains a challenge influencing the economic viability of the technology and hindering its realistic applications. To solve this problem, it requires an integrative approach involving materials chemistry, physical chemistry, polymer science, and materials engineering. In addition to the use of robust wetting and fouling resistant membranes, employing the newly developed self-surface heating membranes such as photothermal, joule heating and induction heating membranes have not only minimized energy requirement and fouling issues of Md technology but also enabled it to be considered as potential and economically viable approach for producing high-quality freshwater with negligible carbon footprint. Specifically, recent studies on self-surface heating membranes, utilizing nanomaterials with photothermal, conductive, and magnetic properties, have revealed new possibilities for renewable energy utilization in Md technology. Through direct irradiation or photovoltaic energy conversion, nanomaterial-integrated membranes significantly enhance Md's energy efficiency and productivity without compromising cost-effectiveness, opening avenues for sustainable desalination and water purification technologies. Here, we furnish a comprehensive state of the art overview on (1) the progress of conventional antifouling Md membranes and (2) the opportunities, challen

关键词： desalination

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Ultrasonic-assisted resistance spot welding of multilayered Al foil stacks for Li-ion battery applications

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Journal of Materials Processing Technology 2023年第1期317卷

作者： Kwon, Ho Shah, Umair Liu, Xun rinker, Teresa J. Cai, Wayne Welding Engineering Department of Materials Science & Engineering The Ohio State University ColumbusOH43202 United States Manufacturing Systems Research Lab General Motors R&D Center WarrenMI48090 United States

Multilayered thin pure aluminum (Al) foils and tabs were joined by a recently developed ultrasonic-assisted resistance spot welding (UrW) process. The ultrasonic vibration was applied from the onset of the preheating current and maintained until the end of the main weld current. Compared with regular resistance spot welds (rSW), solidification cracking and gas porosities were substantially reduced in UrW. The nugget center consisted of mixed microstructures of equiaxed dendrites and non-dendritic structures with minimal boundary segregation. Unique wavy structures were observed at the foil side fusion boundary. As the number of foil layers increased from 25 to 75, the amount of equiaxed dendrites increased while that of wavy structures decreased. The sizes of all UrW nuggets exceeded the critical diameter, which led to button pullout failure mode. The hardness of weld nuggets and heat affected zone (HAZ) were higher in UrW than in rSW. The ultrasonic vibration also reduced HAZ width at the tab of weld stacks. © 2023 Elsevier B.V.

关键词： Spot welding

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Fabrication of polydopamine functionalized AgNF SErS substrate: Applications for sensitive detection of nivalenol in food samples and cell biocompatibility

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Colloids and Surfaces A: Physicochemical and engineering Aspects 2024年 688卷

作者： Kitaw, Sintayehu Leshe Wondosen Ahmed, Yohannis Thankachan, darieo Candra, Andy Wu, Tsung-Yun Anley, Beyadgalem Endawoke Gou, Yu-Xuan Chen, Ying-Yu Cheng, Yu-Ting Birhan, Yihenew Simegniew Chen, Kuan-Ju Tsai, Hsieh-Chih Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Advanced Membrane Materials Center National Taiwan University of Science and Technology Taipei10607 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Chungli320 Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Chemistry College of Natural and Computational Sciences Debre Markos University P.O. Box 269 Debre Markos Ethiopia

Surface-enhanced raman spectroscopy (SErS) is a robust analytical tool applicable for the quick and accurate determination of mycotoxins. However, there hasn't been any attempt to use SErS for the quantitative detection of nivalenol (NIV) thus far. To improve the raman signals of NIV, we fabricated a polydopamine-coated silver nanoflower (PdA-AgNFs) SErS substrate with strong "hot-spots". The PdA-AgNFs substrates showed superior SErS enhancement activities in the target analyte detection and quantification. It produced good substrate uniformity (relative standard deviation of SErS signals, rSd = 4.1% for substrate-to-substrate test, and 3.24% for spot-to-spot test), an enhancement factor of 2.87 × 106 towards rhodamine 6B (r6G), and detection sensitivity as low as 1 femtomolar (10−15 M) against r6G probe molecule. Moreover, the PdA-AgNFs SErS substrates were successfully used, for the first time, to detect NIV in corn, horse beans, and mushroom samples. The calibration curve showed a satisfactory linear fit based on the SErS intensities of different NIV concentrations. The detection limit (LOd) for the suggested approach was 0.22 nM (S/N = 3). Interestingly, the MTT assay experiment demonstrated that PdA-AgNFs had no toxicity against mammalian NIH-3T3 cells. The biocompatible PdA-AgNFs substrates with intense plasmonic effects and binding sites demonstrated impressive raman enhancement, and could serve as an effective, label-free, and fast SErS-based analysis of NIV in real samples. © 2024

关键词： Mycotoxins

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