1,312 research outputs found
Design and performance investigation of metamaterial-inspired dual band antenna for WBAN applications
No full textThis paper presents the design and analysis of a metamaterial-based compact dual-band antenna for WBAN applications. The antenna is designed and fabricated on a 0.254 mm thick semi-flexible substrate, RT/Duroid (R) 5880, with a relative permittivity of 2.2 and a loss tangent of 0.0009. The total dimensions of the antenna are 0.26 lambda(o)x0.19 lambda(o)x0.002 lambda(o), where lambda(o) corresponds to the free space wavelength at 2.45 GHz. To enhance overall performance and isolate the antenna from adverse effects of the human body, it is backed by a 2x2 artificial magnetic conductor (AMC) plane. The total volume of the AMC integrated design is 0.55 lambda(o)x0.55 lambda(o)x0.002 lambda(o). The paper investigates the antenna's performance both with and without AMC integration, considering on- and off-body states, as well as various bending conditions in both E and H-planes. Results indicate that the AMC-integrated antenna gives improved measured gains of 6.61 dBi and 8.02 dBi, with bandwidths of 10.12% and 7.43% at 2.45 GHz and 5.80 GHz, respectively. Furthermore, the AMC integrated antenna reduces the specific absorption rate (SAR) to (>96%) and (>93%) at 2.45 GHz and 5.80 GHz, meeting FCC requirements for low SAR at both frequencies when placed in proximity to the human body. CST Microwave Studio (MWS) and Ansys High-Frequency Structure Simulation (HFSS), both full-wave simulation tools, are utilized to evaluate the antenna's performance and to characterize the AMC unit cell. The simulated and tested results are in mutual agreement. Due to its low profile, high gain, adequate bandwidth, low SAR values, and compact size, the AMC integrated antenna is considered suitable for WBAN applications
On exploiting human domain workflows in cyber-physical systems
No full textIn this thesis, we describe a general methodology for enhancing sensing accuracy in cyber-physical systems that involve human domain workflows in noisy physical environment. A novel workflow-aware sensing model is proposed to jointly correct unreliable sensor data and keep track of states in a workflow. We also propose a new inference algorithm to handle cases with partially known states and objects as supervision. Our model is evaluated with extensive simulations. As a concrete application, we develop a novel log service called Emergency Transcriber, which can automatically document operational procedures followed by teams of first responders in emergency response scenarios. Evaluation shows that our system has significant improvement over commercial off-the-shelf (COTS) sensors and keeps track of workflow states with high accuracy in noisy physical environment.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Hongwei Wang, accepted the attached license on 2016-12-06 at 15:52.The student, Hongwei Wang, submitted this Thesis for approval on 2016-12-06 at 16:57.This Thesis was approved for publication on 2016-12-07 at 09:47.DSpace SAF Submission Ingestion Package generated from Vireo submission #10458 on 2017-02-28 at 14:43:19Made available in DSpace on 2017-03-01T17:02:05Z (GMT). No. of bitstreams: 2
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Quantum scattering code to simulate photodetachment process
No full text<p>Quantum scattering code to simulate photodetachment process of penta-atomic system in the AB + CDE Jacobi coordinates.</p>
<p>Users are required to cite the following papers:</p>
<ol>
<li>Phys. Chem. Chem. Phys. 2014, 16, 17770-17776;</li>
<li>J. Chem. Phys. 2016, 144, 244311;</li>
<li>Phys. Chem. Chem. Phys. 2021, 23, 22298-22304.</li>
</ol>
<p>Corresponding author : Hongwei Song Email: <a href="mailto:[email protected]">[email protected]</a></p>
<p>Affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China</p>
<p>All Copyrights Reserved by the Original Authors.</p>
Genetic redundancy of senescence-associated transcription factors in Arabidopsis
No full textLeaf senescence is a genetically programmed process that constitutes the last stage of leaf development, and involves massive changes in gene expression. As a result of the intensive efforts that have been made to elucidate the molecular genetic mechanisms underlying leaf senescence, 184 genes that alter leaf senescence phenotypes when mutated or overexpressed have been identified in Arabidopsis thaliana over the past two decades. Concurrently, experimental evidence on functional redundancy within senescence-associated genes (SAGs) has increased. In this review, we focus on transcription factors that play regulatory roles in Arabidopsis leaf senescence, and describe the relationships among gene duplication, gene expression level, and senescence phenotypes. Previous findings and our re-analysis demonstrate the widespread existence of duplicate SAG pairs and a correlation between gene expression levels in duplicate genes and senescence-related phenotypic severity of the corresponding mutants. We also highlight effective and powerful tools that are available for functional analyses of redundant SAGs. We propose that the study of duplicate SAG pairs offers a unique opportunity to understand the regulation of leaf senescence and can guide the investigation of the functions of redundant SAGs via reverse genetic approaches
© The Author(s) 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved.1
Correction to: Physics-informed deep learning for three-dimensional transient heat transfer analysis of functionally graded materials
No full textIn the original publication of the article, the author wanted to correct the authors group and affiliation as it was wrongly updated. The correct authors group and affiliation should be: Hongwei Guo1,2, Xiaoying Zhuang1,2, Xiaolong Fu3, Yunzheng Zhu4 and Timon Rabczuk5 1 Department of Geotechnical Engineering,Tongji University,Shanghai, 200092, P.R. China. 2 Chair of Computational Science and Simulation Technology, Leibniz Universitat Hannover, Hannover, Germany. 3 Xi’an Modern Chemistry Research Institute, Xi’an, China. 4 Department of Electrical and Computer Engineering, UCLA, 420 Westwood Plaza, Los Angeles, CA 90095, USA. 5 Institute of Structural Mechanics, Bauhaus Universität Weimar, Weimar, Germany Now, the original article has been updated
Discovery and Characterization of ZTF J0112+5827: an 80.9-Minute Polar with Strong Cyclotron Features
No full textThis dataset includes spectral data associated with the research "Discovery and Characterization of ZTF J0112+5827: an 80.9-Minute Polar with Strong Cyclotron Features." It contains images of spectra obtained from different telescopes, each supplemented with phase information to support detailed analysis. - Emission_line.png: Phase-resolved spectroscopy of ZTF J0112+5827, captured with low-resolution spectra from the P200, illustrates the evolution of the Balmer emission lines over the orbital period. - spectraP200.png: The time-resolved spectra of ZTF J0112+5827 obtained with P200/DBSP displays 30 partial spectra over one cycle. The grey portion indicates the region where the red and blue spectra are stitched together, characterized by a relatively low signal-to-noise ratio. - spectraGTC.png: Four spectra of ZTF J0112+5827 obtained with OSIRIS/GTC. - spectra_fits.zip: A compressed file containing processed spectral data in FITS format, allowing researchers to utilize the source files for further examination and replication of the findings.Peer reviewe
Love Your Films and Love Your Life: An Interview with Fan Popo
No full textInvited by the Institute for Screen Industries Research, the University of Nottingham, Chinese queer filmmaker and activist Fan Popo visited Nottingham in February 2018 for a series of events titled “‘Queer Cinema as Art, Activism and Industry’,” including research workshops, student seminars, and film screenings. Dr Bao Hongwei, Assistant Professor in Media Studies, interviewed Fan about the latter’s filmmaking career and his participation in transnational screen industries. This interview focuses on the status quo of queer independent filmmaking in a transnational context, with an emphasis on the opportunities and challenges that creative professionals face in increasingly commercialised and competitive work environment.Fan Popo is an independent filmmaker and queer activist from Beijing. He studied screenwriting at the Beijing Film Academy. After his graduation in 2007 he became a leading figure in China’s queer filmmaking and activist communities. His documentaries on LGBTQ and gender issues have been screened at film festivals around the world. Fan Popo is the author of Happy Together: A Complete Record of a Hundred Queer Films. He is also an organizer of the Beijing Queer Film Festival and the China Queer Film Festival Tour. In 2015, he sued China’s censorship authority, the State Administration of Radio, Film, and Television (SARFT), for banning his film Mama Rainbow from online video streaming platforms, and this became a landmark event for China’s queer activism. Fan’s films include: New Beijing New Marriage, Be a Woman, Chinese Closet, Mama Rainbow, The VaChina Monologues, and Papa Rainbow. Fan is currently based in Berlin, writing scripts and making new films
Stability of subsea pipelines during large storms
No full textpipeline stability, scour, offshore hydrodynamics Author for correspondence
Discovery and characterization of ZTF J0112+5827: An 80.9-minute polar with strong cyclotron features
No full textContext. A new X-ray Cataclysmic variable (CV) candidate exhibits distinct light-curve characteristics in the ZTF’s g, r, and i bands. The paper includes the optical identification and multiwavelength analysis of this CV candidate.
Aims. This work aims to determine if a previously identified CV candidate, ZTF J0112+5827, is a polar system by examining its X-ray and cyclotron radiation characteristics.
Methods. We characterized the X-ray emission of ZTF J0112+5827 using the ROSAT observations. The gri-band optical light curves were obtained from the Zwicky Transient Facility. After two nights of time-domain spectroscopic observations with the Palomar 200-inch telescope, we mapped the accretion structures using Doppler tomography.
Results. ZTF J0112+5827 exhibits an orbital period of 80.9 minutes, determined from the ZTF light curves, and an average X-ray flux of (68.4 ± 15.7)×10−14 erg s−1 cm−2 in the 0.1–2.4 keV range. It shows an ellipsoidal-like variability curve in the g band, with two prominent humps around phases of ∼0.0 and ∼0.7 in the i and r bands. In the spectra corresponding to these phases, a redward-increasing power-law continuum appears, which is accompanied by prominent features of cyclotron emission humps. Emission lines of He II and Balmer series were observed. The magnetic field strength of ZTF J0112+5827 was determined from the cyclotron harmonics. Its tomography map revealed the presence of accretion streams, but there was no evidence of an accretion disk structure. The line-of-sight velocity of the Balmer emission was measured at about 500 km s−1, the majority of which was contributed by accretion streams and accretion spots. Our result confirms that ZTF J0112+5827 is a polar system. It contains a magnetic white dwarf with a magnetic field strength of MG
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