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Polarization singularities in planar electromagnetic resonators with rotation and mirror symmetries

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Photonics Research 2023年第6期11卷 936-952页

作者： JIe YANG XUeZHI ZHeNG JIAFU WANG ANXUe ZHANG TIe JUN CUI guy a.e.vandenbosch WaveCoRe Research Group KU LeuvenLeuven B-3001Belgium Xi’an Jiaotong University Xi’an 710049China State Key Laboratory of Millimeter Wave Southeast UniversityNanjing 210096China

In this work,we apply the group representation theory to systematically study polarization singularities in the inplane components of the electric fields supported by a planar electromagnetic(eM)resonator with generic rotation and reflection *** reveal the intrinsic connections between the symmetries and the topological features,i.e.,the spatial configuration of the in-plane fields and the associated polarization *** connections are substantiated by a simple relation that links the topological charges of the singularities and the symmetries of the *** verify,a microwave planar resonator with the D8group symmetries is designed and numerically simulated,which demonstrates the theoretical findings *** discussions can be applied to generic eM resonators working in a wide eM spectrum,such as circular antenna arrays,microring resonators,and photonic quasi-crystals,and provide a unique symmetry perspective on many effects in singular optics and topological photonics.

关键词： planar rotation symmetries

A Preliminary Ray Tracing Approach to Computational electromagnetics for Reverberation Chambers

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Journal of electromagnetic Analysis and Applications 2010年第8期2卷 462-466页

作者： Filip Nauwelaerts Dirk Van Troyen guy A. e. vandenbosch 不详

This paper summarizes a theoretical design analysis for the implementation of an electromagnetic modeling tool, focusing on the simulation of electromagnetic field propagation inside reverberation chambers. The simulation algorithms which have been developed rely on a ray tracing technique, adapted in such a way as to maximize compatibility with the specific requirements and parameters, as applicable for reverberation chambers. The most significant example of a typical parameter is the high rate of wave reflections inside the chambers’ cavity. An implementation of the algorithms was used for simulation of several theoretically predictable cases. Study of the results of these test cases showed that some of the design decisions and algorithms used need to be reviewed in order to optimize the computational aspects of the application, such as resource management (memory, CPU time). Results of typical sample cases are re- viewed in this paper as well, in order to identify possible pitfalls and objectives for future research.

关键词： electromagnetic modeling Computational electromagnetics Ray tracing

Advances in Y-90 radioembolization for the treatment of hepatocellular carcinoma

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Hepatoma Research 2022年第1期8卷 9-21页

作者： Andrew J.Woerner guy e.Johnson Department of Radiology Section of Interventional RadiologyUniversity of WashingtonSeattleWA 98195USA

Hepatocellular carcinoma remains a prominent cause of cancer-related mortality *** yttrium-90 radioembolization is a versatile therapy and plays an important role in the treatment of hepatocellular *** review summarizes the establishment of radioembolization in the hepatocellular carcinoma treatment paradigm,treatment considerations across cancer stages,and recent advances in evidence.

关键词： Hepatocellular carcinoma radioembolization yttrium-90 dosimetry radiation segmentectomy

An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

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International Journal of Mining Science and Technology 2017年第1期27卷 9-15页

作者： Reed guy Mctyer Kent Frith Russell Mine Advice Pry Ltd NewcastleNSW 2322Australia

Coal pillar design has historically assigned a factor of safety(Fo S) or stability factor(SF) according to their estimated strength and the assumed overburden load acting on them. Acceptable Fo S values have been assigned based on past mining experience or a statistical link between Fo S and probability of failure(Po F). Pillar width-to-height(w/h) ratio has long been established as having a material influence on both pillar strength and its potential failure mode. However, there has been significant disagreement on using both factor of safety(Fo S) and w/h as part of pillar system stability criterion, as compared to using Fo S in isolation. This paper will argue that there are valid technical reasons to bring w/h ratio into system stability criteria(other than its influence on pillar strength), as it is related to the post-failure stiffness of the pillar, as measured in situ, and its interaction with overburden stiffness. When overburden stiffness is also brought into pillar system stability considerations, two issues emerge. The first is the width-todepth(W/D) ratio of the panel and whether it is sub-critical or super-critical from a surface subsidence perspective. The second relates to a re-evaluation of pillar Fo S based on whether the pillar is in an elastic or non-elastic(i.e., post-yield) state in its as-designed condition, as this is relevant to maintaining overburden stiffness at the highest possible level. The significance of the model is the potential to maximise both reserve recovery and mining efficiencies without any discernible increase in geotechnical risk, particularly in thick seams and higher depth of cover mining situations. At a time when mining economics are, at best, marginal, removing potentially unnecessary design conservatism is of interest to all mine operators and is an important topic for discussion amongst the geotechnical community.

关键词： Coa] pillars Stability Overburden Post-failure behaviour Stability criteria

enhancing perianal disease management with integrated physical and psychological approaches

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World Journal of Clinical Cases 2025年第2期13卷 59-63页

作者： Uchenna e Okpete Haewon Byeon Department of Digital Anti-aging Healthcare(BK21) Inje UniversityGimhae 50834South Korea

This article provides a comprehensive analysis of the study by Hou et al,focusing on the complex interplay between psychological and physical factors in the postoperative recovery(POR)of patients with perianal *** study sheds light on how illness perception,anxiety,and depression significantly influence recovery *** et al developed a predictive model that demonstrated high accuracy in identifying patients at risk of poor *** article explores the critical role of pre-operative psychological assessment,highlighting the need for mental health support and personalized recovery plans in enhancing POR quality.A multidisciplinary approach,integrating mental health professionals with surgeons,anesthesiologists,and other specialists,is emphasized to ensure comprehensive care for *** study’s findings serve as a call to integrate psychological care into surgical practice to optimize outcomes for patients with perianal diseases.

关键词： Perianal disease Post-operative recovery Anxiety Depression Pain management emotional well-being Multidisciplinary approach

Water balloon-induced orbital fracture in an aviator

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Military Medical Research 2020年第2期7卷 245-248页

作者： Timothy e.Holland David M.Smith guy N.Gibson Jared G.Brinkerhoff Flight and Operational Medical Clinic 78th Medical Group655 Seventh StreetRobins Air Force BaseRobinsGA 31098USA Department of Radiology Ehrling Bergquist Clinic2501 Capehart RdOffutt AFBNEOffutt 68113-2160USA Flight and Operational Medical Clinic 5th Medical Group194 Missilie AveMinot AFBNDMinot 58705USA

Background:Orbital fractures are common injuries found in facial *** etiologies of orbital fractures include motor vehicle collisions and *** report the case of a 32-year-old male who suffered an orbital fracture from a water ***,we describe the aeromedical complications that may result from this ***,we attempt to answer the question of when a patient may return to flying after sustaining such an injury through review of the *** presentation:A 32-year-old male pilot with the United States Air Force was at an outdoor event with his unit when he was struck with a water balloon launched from a sling shot into his left *** afterwards,he had an onset of subcutaneous emphysema and was escorted to a nearby emergency *** tomography identified an orbital fracture with associated orbital and subcutaneous *** patient was evaluated by a plastic surgeon and was determined not to be a surgical *** weeks later,he returned to flying ***:Water balloons are thought to be safe and harmless ***,when coupled with sling shots,water balloons can become formidable projectiles capable of significant orbital injury including orbital *** injuries are concerning to aviators,as the most common sites for fractures of the orbit are the thin ethmoid and maxillary bones adjacent to the *** altitude,gases in the sinuses may expand and enter the orbit through these fractures,which may suddenly incapacitate the *** is important for flight surgeons to identify and assess these individuals to determine suitability for flying.

关键词： Boyle’s law Orbital emphysema Facial fracture

NeCAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael K.e.Schafer Sudena Wang Michael J.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal eF-hand calcium-binding proteins 1–3(NeCAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one eF-hand calcium-binding domain and a functionally less well characterized C-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NeCAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NeCAB2 interacts with predominantly striatal G-protein-coupled receptors, while NeCAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NeCAB proteins exhibit distinct subcellular localizations: NeCAB1 is found in the nucleus and cytosol, NeCAB2 resides in endosomes and the plasma membrane, and NeCAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NeCAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. However, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NeCAB proteins by controlling the availability of protein–protein interaction domains situated between the eF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium eF hand mitochondria nervous system signal transduction

Study of the behaviour of the dielectric constant in Cu,Fe:BaTiO_3

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2008年第3期9卷 429-434页

作者： Alioune OUeDRAOGO Kalifa PALM Issaka OUeDRAOGO guy CHANUSSOT Laboratory of Applied Organic Chemistry and Physics UFR/SEA University of Ouagadougou BP 7021 Ouagadougou Burkina Faso Laboratory of Dielectrics University of Dijon 21000 Dijon France)

In this work we study the behaviour of the dielectric constant of BaTiO3 single crystals doped with Cu and Fe for different ion percentages, particularly, the influence of these hetemvalent substitutions on the ferroelectric-paraelectric phase transition whose temperature is found at Tc=120℃ for pure samples. The dielectric constant e in terms of temperature shows that the Curie temperature decreases when the quantity of impurities increases and presents a broadening and flattering of the maximum oft（T） within higher values, with the transition becoming more and more diffuse. It is interesting to have a material with very high permittivity （high-k） because of its capacity to store an important quantity of electric charges. The t anisotropy and the Curie-Weiss law are also verified with a good ratio between the slopes ofε^-l（T） from both sides of the transition, leading to a Curie constant： C= 13 × 10^4 K for BaTiO3：1.6%Fe in the polar phase. BaTiO3 is a displacive ferroelectric going through a first-order phase transition. The substitutions have an effect on the dynamics of the perovskite lattice. They induce charges transfer to Ti and a diminution of elastic forces in BaTiO3. Then we discuss the transition but on the nature of the material. fact that the maximum of permittivity does not depend on the phase

关键词： Phase transition Ferroelectric BaTiO3 Remeika single crystals Dielectric constant Curie constant

environmental barcoding of the ectomycorrhizal fungal genus Cortinarius

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Fungal Diversity 2013年第1期58卷 299-310页

作者： Suliana e.Teasdale Anne K.Beulke Paul L.guy David A.Orlovich Department of Botany University of OtagoPO Box 56Dunedin 9054New Zealand Department of ecology Evolution and BehaviorCollege of Biological SciencesUniversity of Minnesota1987 Upper Buford CircleSt PaulMN 55108USA

Understanding the role of ectomycorrhizal fungi in plant communities is hampered by a lack of knowledge about fungal *** barcoding of the ectomycorrhizal fungal genus Cortinarius was used to compare fungal diversity in soil from four plant communities:(i)Nothofagus forest(where Cortinarius is common and diverse),(ii)Kunzea forest(where Cortinarius is present but with low diversity),(iii)a Pinus radiata plantation(Cortinarius is not thought to be present)and(iv)a sub-Antarctic island(where known ectomycorrhizal hosts are absent).PCR primers specific for the ITS region of Cortinarius species were *** was tested in vitro and in silico against DNA from basidiocarps of Cortinarius and non-Cortinarius *** primers were tested for their ability to amplify Cortinarius DNA in soil from forests of the three ectomycorrhizal forest communities and a range of soils from the ectomycorrhiza-free subantarctic Campbell *** diversity of Cortinarius was associated with soil of all three ectomycorrhizal communities,despite Cortinarius being previously unrecorded from *** from all three communities share some ectomycorrhizal fungi(including fungi shared between native and exotic hosts),having implications for community succession,introduction of exotic fungi and biodiversity *** Cortinarius was detected from Campbell Island *** validated molecular protocol assessed species diversity in a rapid and cost effective *** biodiversity assessment based on DNA barcoding is more effective at detecting diversity than traditional methods,but requires careful consideration of the difference between ectomycorrhizal fungal diversity in soil versus root-tips.

关键词： Cortinarius Internal transcribed spacer region ectomycorrhizal ecology environmental DNA Barcoding Taxon-specific primers