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Helix Inspired 28 GHz Broadband Antenna with End-Fire Radiation Pattern

Computers, Materials & Continua 2022年第1期70卷 1935-1944页

作者： Hijab Zahra Wahaj Abbas Awan Niamat Hussain Syed Muzahir Abbas subhas mukhopadhyay School of Engineering Faculty of Science and EngineeringMacquarie UniversitySydneyNSW2109Australia Department of Integrated IT Engineering Seoul National University of Science and TechnologySeoul01811Korea Department of Information and Communication Engineering Chungbuk National UniversityChungbuk28644Korea BENELEC BotanySydneyNSW2019Australia

This paper presents the design and characterization of a via free planar single turn helix for 28 GHz broadband *** proposed antenna is designed using ROGERS RO4003 material,having a simple structure and end-fire radiation *** antenna comprises of a compact dimension of 1.36λ_(0)×0.9λ_(0) with a thickness of 0.0189λ_(0)(whereλ_(0) is the free-space wavelength at the central frequency of 28 GHz).Parametric study has been carried out to investigate the impact of key design parameters and to achieve an optimum *** show a good agreement between the simulated and measured results.A single turn helical inspired antenna covers−10 dB impedance bandwidth of 26.25-30.14 GHz having a peak gain of 5.83 dB and radiation efficiency up to 85%.Moreover,linear array configurations with 2 and 4 elements have been analyzed for applications with higher gain and space *** array configurations are suitable for applications having space constraints in one *** show that peak gain up to 8.2 dB and 11.1 dB can be achieved with 2 and 4 elements,*** to its simple planar and via free structure,this antenna is suitable for 5G communications and for sensing,imaging,IoT and tracking applications at 28 GHz band spectrum.

关键词： Compact antenna millimeter wave antenna 28 GHz 5G antenna

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State of the Art of Switched Reluctance Generator

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Energy and Power Engineering 2012年第6期4卷 447-458页

作者： Amissa Arifin Ibrahim Al-Bahadly subhas Chandra mukhopadhyay School of Engineering and Advanced Technology Massey University Palmerston North New Zealand

This paper provides a comprehensive review of the recent development on the switched reluctance machine operating in generating mode in both the low and high speed operations. The machine consists of a salient rotor and stator poles and controlled via switching of the power electronic devices. There is a steady development of the machine operating in the motoring mode;however, its generating operation is still under study. This paper gives an overview of the machine, followed by the principle of operation in generating mode and briefly discusses the structure and types of control methods which involve the switched reluctance generator (SRG). Due to its geometry simplicity and advantages such as robust, ability to operate over a wide speed range and absence of permanent magnet and windings on the rotor, the SRG promises to be a good candidate for variable speed application.

关键词： Switched Reluctance Generator (SRG) SRG Control SRG Converter Circuit SRG Structure

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智能感知、无线传感器及测量

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作者： (新西兰)苏巴斯·钱德拉·穆克帕德亚(subhas Chandra mukhopadhyay)

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Identification of genes associated with gall bladder cell carcinogenesis:Implications in targeted therapy of gall bladder cancer

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World Journal of Gastrointestinal Oncology 2023年第12期15卷 2053-2063页

作者： Ishita Ghosh Ruma Dey Ghosh Soma mukhopadhyay Department of Molecular Biology Netaji Subhas Chandra Bose Cancer Research InstituteKolkata 700094India

Gall bladder cancer(GBC)is becoming a very devastating form of hepatobiliary cancer in *** year new cases of GBC are quite high in *** recent advanced multimodality treatment options,the survival of GBC patients is very *** the disease is diagnosed at the advanced stage(with local nodal metastasis or distant metastasis)or surgical resection is inoperable,the prognosis of those patients is very ***,perspectives of targeted therapy are being *** therapy includes hormone therapy,proteasome inhibitors,signal transduction and apoptosis inhibitors,angiogenesis inhibitors,and immunotherapeutic *** such signal transduction inhibitor is the specific short interfering RNA(siRNA)or short hairpin RNA(shRNA).For developing siRNAmediated therapy shRNA,although several preclinical studies to evaluate the efficacy of these key molecules have been performed using gall bladder cells,many more clinical trials are *** date,many such genes have been *** review will discuss the recently identified genes associated with GBC and those that have implications in its treatment by siRNA or shRNA.

关键词： Gall bladder cancer Gene biomarker Targeted therapy siRNA mediated therapy Prognosis Advanced therapy of gall bladder cancer

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