C. Chan
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Articles by C. Chan
Condensed Matter > Other Condensed Matter
[Submitted on 2 Aug 2026 ( v1 ), last revised 8 Oct 2026 (this version, v4)] Title:Integer-Graded Reciprocal Skin Effect from Internal Rotation View a PDF of the paper titled Integer-Graded Reciprocal Skin Effect from Internal Rotation, by Kin Hung Fung and C. T. Chan View PDF HTML (experimental) Abstract:A prominent class of reciprocal non-Hermitian skin effects has a $\Z_{2}$ topological classification, characterized by a parity invariant protected by reciprocity.
Insulator-free topological photonic multi-lane highways
Abstract Topological protection in photonic structures enables robust unidirectional propagation immune to structural disorder1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. However, conventional implementations obtain this protection from topological-insulator domains whose interfaces host narrow guiding channels, leaving much of the insulating bulk inactive for transport. This imposes a fundamental trade-off between topological robustness and spatial footprint21,22,23,24,25.
Impacts of particle morphology and rotation on optical manipulation
Abstract It is well known that nonspherical particles rotate continuously in light beams, with their rotation directions determined by the light spin. Here, we reveal that particle morphology (e.g., size, shape, length, etc.) and rotation angle are vital in influencing light–matter interactions, thereby optical torques (OTs) and forces, especially in a paraxial or slightly defocused optical system. Positive and negative OTs emerge with distinct rotation angles in light fields.
Scalable generalized meta-spanners enabling parallel multitasking optical manipulation
Abstract Optical manipulation techniques offer exceptional contactless control but are fundamentally limited in their ability to perform parallel multitasking. To achieve high-density, versatile manipulation with subwavelength photonic devices, it is essential to sculpt light in multiple dimensions.
Functional genomics and tumor microenvironment analysis reveal prognostic biological subtypes in Mantle cell lymphoma - Nature Communications
Nonlocality-enabled photonic analogies of parallel spaces, wormholes and multiple realities - Nature Communications
Abstract The concepts of the multiverse and wormholes in dimensions beyond our physical space have long captivated curiosity and imagination, yet experimental demonstrations remain elusive. In this work, we employ nonlocal artificial materials to construct a photonic analogy of parallel spaces, where two distinct effective optical media coexist within a single artificial material, each accessible through different material boundaries.
CEACAM1 as a mediator of B-cell receptor signaling in mantle cell lymphoma - Nature Communications
Abstract B-cell receptor (BCR) signaling plays an important role in the pathogenesis of mantle cell lymphoma (MCL), but the detailed mechanisms are not fully understood. In this study, through a genome-wide loss-of-function screen, we identify carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) as an essential factor in a subset of MCL tumors. Our signal transduction studies reveal that CEACAM1 plays a critical role in BCR activation through involvement in two dynamic processes.
Near-field imaging of synthetic dimensional integrated plasmonic topological Harper nanochains - Nature Communications
Abstract Topological photonics offers immense potential for applications in integrated photonic devices and information processing chips. Aubry–André–Harper model provides a platform for exploring new physics and practical applications.
What is cancer pain? Investigating attitudes of patients, carers, and health professionals: A cross‐sectional survey
INTRODUCTION Cancer pain is defined by the International Association for the Study of Pain (IASP) as any pain arising from the primary tumor, its metastases, or associated treatments and is a prevalent, debilitating symptom.
Ask Us Anything Employer Webinar: Effective Employment Agreements - Tips for Setting Up Contracts
Click here to watch the video On February 26, our Workplace Law Group hosted their first Ask Us Anything Employer Webinar of 2025, discussing effective employment contracts and issues around drafting contracts including limiting liability through an enforceable termination clause. The panel discussion provided insights from members of our Workplace Law group: Scott Marcinkow, Rose Keith, KC, C. Ryan Chan, Brett Weninger, Deanna Froese, and Neal Parker.
Graduate Degree in Electric Vehicles-A Timely Programme for Modern Society
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Obstacle-insensitive eigenfields due to boundary condition--symmetry compatibility
It is known that the eigenspectra and eigenfields of wave systems are sensitive to boundary conditions. We show a counterintuitive result that two hard-boundary sound cavities of different boundary shapes and of different sizes have a common set of eigenfrequencies. Moreover, their eigenfields at shared frequencies are the same in some of their common subregions.
The impact of perioperative transfusions on the oncologic outcomes of patients with ovarian cancer: A population‐based study
DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the Institute for Clinical Evaluative Sciences. Restrictions apply to the availability of these data, which were used under license for this study.
Restoration of non-Hermitian bulk-boundary correspondence by counterbalancing skin effect - Communications Physics
Abstract In systems exhibiting the non-Hermitian skin effect (NHSE), the bulk spectrum under open boundary conditions (OBC) significantly differs from that of its periodic counterpart. This disparity renders the conventional bulk-boundary correspondence (BBC) inapplicable. Here we propose an intuitive approach called doubling and swapping to restore the BBC, using the non-Hermitian Su-Schrieffer-Heeger model as an example.
Finite barrier bound state - Light: Science & Applications
Abstract A boundary mode localized on one side of a finite-size lattice can tunnel to the opposite side which results in unwanted couplings. Conventional wisdom tells that the tunneling probability decays exponentially with the size of the system which thus requires many lattice sites before eventually becoming negligibly small. Here we show that the tunneling probability for some boundary modes can apparently vanish at specific wavevectors.
Harper Grey Hosts Ask Us Anything Employer Webinar: New Year Refresher - An Employer’s Duty to Accommodate
Click here to listen the audio On February 14, our Workplace Law Group hosted their first Ask Us Anything Employer Webinar of 2024, a deep-dive into an employer’s duty to accommodate with reference to recent developments to the WorkSafe BC rules. The panel discussion provided insights from members of our Workplace Law group: Scott Marcinkow, Rose Keith, KC, C. Ryan Chan, Deanna Froese, Neal Parker, and Brett Weninger.
A non-canonical striatopallidal Go pathway that supports motor control - Nature Communications
Abstract In the classical model of the basal ganglia, direct pathway striatal projection neurons (dSPNs) send projections to the substantia nigra (SNr) and entopeduncular nucleus to regulate motor function. Recent studies have re-established that dSPNs also possess axon collaterals within the globus pallidus (GPe) (bridging collaterals), yet the significance of these collaterals for behavior is unknown.
Applications of bound states in the continuum in photonics - Nature Reviews Physics
Abstract Bound states in the continuum (BICs) have attracted attention in photonics owing to their interesting properties. For example, BICs can effectively confine light in a counterintuitive way, and the far-field radiation of photonic structures that exhibit BICs has fascinating topological characteristics.
THE ADIPOCYTE-SPECIFIC ROLE OF CASPASE-8 SIGNALING IN ADIPOSITY
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Cell and circuit complexity of the external globus pallidus - Nature Neuroscience
Cite this article Courtney, C.D., Pamukcu, A. & Chan, C.S. Cell and circuit complexity of the external globus pallidus. Nat Neurosci (2023). https://doi.org/10.1038/s41593-023-01368-7 Download citation Received: 21 April 2021 Accepted: 18 May 2023 Published: 19 June 2023 DOI: https://doi.org/10.1038/s41593-023-01368-7 Share this article Anyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article.
A Very Unusual Burn Complication: Bilateral Endogenous Bacterial Endophthalmitis.
Eplasty, Apr 2023 This is a preview of a remote PDF: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9912047/pdf/ C. Chan, L. Zhang, R. Pandit, C. Lewis. , Eplasty, pp. e6,
Pain and Interventions in Stage IV Non-Small Cell Lung Cancer: A Province-Wide Analysis
Open AccessArticle by Vivian S. Tan 1, Michael C. Tjong 2, Wing C. Chan 3, Michael Yan 4, Victoria Delibasic 3, Gail Darling 5, Laura E. Davis 6, Mark Doherty 7, Julie Hallet 8, Biniam Kidane 9, Alyson Mahar 10, Nicole Mittmann 11, Ambika Parmar 7, Hendrick Tan 12, Frances C. Wright 8, Natalie G. Coburn 8 and Alexander V.
Cell type-specific processing of non-motor signals in the external pallidum
The external globus pallidus (GPe) regulates motor control. However, whether the GPe encodes non-motor information remains unclear. Two recent studies, by Johansson and Ketzef , and Katabi et al. , provide in vivo evidence for GPe neuron processing of sensory stimulation and reward cues via a division of labor among its cell types.
Patterns of First-Line Systemic Therapy Delivery and Outcomes in Advanced Epithelial Ovarian Cancer in Ontario
This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Shiru L. Liu 1,2, Wing C. Chan 3, Geneviève Bouchard-Fortier 4,5, Stephanie Lheureux 6, Sarah E. Ferguson 4,5 and Monika K.
Decomposition of the Reynolds shear stress in a turbulent boundary layer modified by miniature vortex generators
Abstract The investigation of the spanwise modulation of the Reynolds shear stress (RSS) distributions of a turbulent boundary layer modified by miniature vortex generators (MVGs) is performed, using an approach on a time-resolved velocity data set. The methodology is based on quadrant analysis of RSS to first identify the spatial and temporal information of the RSS events.
On-chip nanophotonic topological rainbow - Nature Communications
Abstract The era of Big Data requires nanophotonic chips to have large information processing capacity. Multiple frequency on-chip nanophotonic devices are highly desirable for density integration, but such devices are more susceptible to structural imperfection because of their nano-scale. Topological photonics provides a robust platform for next-generation nanophotonic chips.
Large-scale and small-scale contribution to the skin friction reduction in a modified turbulent boundary layer by a large-eddy break-up device
Abstract The role of streamwise length scales (λx) in turbulent skin friction generation is investigated using a direct numerical simulation data set of an incompressible zero pressure gradient turbulent boundary layer and the spectral analysis based on the Fukagata-Iwamoto-Kasagi (FIK) identity by Fukagata et al. [K. Fukagata et al., Phys. Fluids 14, L73 (2002)]. The total skin friction generation associated with motions scaled with local boundary layer thickness δ of λx<3δ and λx>3δ is assessed.
Topology in non-Hermitian Chern insulators with skin effect
Abstract The non-Hermitian skin effect can arise in materials that have asymmetric hoppings between atoms or resonating units, which makes the bulk eigenspectrum sensitive to boundary conditions. When skin effect emerges, eigenstates in the bulk continuum can become localized on the edges, making the distinction between edge and bulk states challenging.
External validation of a shortened screening tool using individual participant data meta-analysis: A case study of the Patient Health Questionnaire-Dep-4
Harel, D. et al. (2022) External validation of a shortened screening tool using individual participant data meta-analysis: A case study of the Patient Health Questionnaire-Dep-4. Methods, 204, pp. 300-311. (doi: 10.1016/j.ymeth.2021.11.005) (PMID:34780986) Full text not currently available from Enlighten. Abstract Shortened versions of self-reported questionnaires may be used to reduce respondent burden.
Maintaining breast cancer care in the face of COVID‐19
Introduction Globally, the COVID‐19 pandemic has proven to be an unpredictable enemy imposing unprecedented challenges. The multidisciplinary breast cancer team at the National University Hospital, Singapore, a tertiary academic medical centre, manages about 600 patients with breast cancer annually. Resource and manpower diversions for COVID‐19 services have resulted in loss of clinic assistants, inpatient beds, operating theatres and specialty‐trained staff.
Head tossing behaviour in six horses: Trigeminal‐mediated head‐shaking or musculoskeletal pain?
Summary The objective of this study was to report the clinical findings of six horses referred for investigation of head‐shaking and to compare and contrast the findings to those of trigeminal‐mediated head‐shaking. The case records of six horses showing head tossing behaviour (vertical up and down movement of the head during ridden exercise) that were referred to the Animal Health Trust were reviewed and a summary of the clinical findings reported.
Thread by @csaviochan: Here are some tips re mouse colony during #COVID19. It is somewhat lab specific. Think about what will happen in 6-8 weeks. General: - vivar…
Let's be clear on this: The people who voted for something that left us with fewer doctors/nurses than we would have had, just before a deadly pandemic where we're going to be short on doctors/nurses, don't get to complain that those who warned against it, are pointing that out. Saying now's not the time to talk about Brexit weakening the NHS during #covidー19uk is like saying you can't talk about gun laws after mass-shootings. The effects of Brexit will be negotiated THIS YEAR.
Organic carbon fractions in temperate mangrove and saltmarsh soils
RESEARCH ARTICLE Previous Next Online Early V. N. L. Wong A B , R. E. Reef A , C. Chan A and K. S. Goldsmith A + Author Affiliations - Author Affiliations A School of Earth, Atmosphere and Environment, Monash University. Wellington Road, Clayton Vic. 3800, Australia. B Corresponding author.
Competing risks analysis of the association between perioperative blood transfusion and long‐term outcomes after resection of colorectal cancer
Original article O. F. Dent Corresponding Author E-mail address: owen.dent@netspeed.com.au https://orcid.org/0000-0003-3033-5744 Colorectal Surgical Unit, Concord Repatriation General Hospital, Sydney, New South Wales, Australia Discipline of Surgery, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia Correspondence to: Owen Dent, Colorectal Surgical Unit, Concord Repatriation General Hospital, Sydney, New South Wales 2139, Australia.
CTRad 10 Years On: From 10-point Plan to Top 10 Achievements
To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. Fig 1 CTRad's strategic vision, 2018–2021.
Topological phases in acoustic and mechanical systems
Abstract The study of classical wave physics has been reinvigorated by incorporating the concept of the geometric phase, which has its roots in optics, and topological notions that were previously explored in condensed matter physics. Recently, sound waves and a variety of mechanical systems have emerged as excellent platforms that exemplify the universality and diversity of topological phases.
A smartphone oximeter with a fingertip probe for use during exercise training: usability, validity and reliability in individuals with chronic lung disease and healthy controls
Publication HistoryPublished online: October 26, 2018Accepted: July 26, 2018; Received: October 25, 2017;
Using δ13C of Levoglucosan As a Chemical Clock
Compound specific carbon isotopic measurements (δ13C) of levoglucosan were carried out for ambient aerosol sampled during an intensive biomass burning period at different sites in Guangdong province, China. The δ13C of ambient levoglucosan was found to be noticeably heavier than the average δ13C of levoglucosan found in source C3-plant-combustion samples. To estimate the photochemical age of sampled ambient levoglucosan, back trajectory analyses were done.
Long-term Outcome of Endovascular Treatment for Mycotic Aortic Aneurysm
Publication HistoryPublished online: August 18, 2017Accepted: July 9, 2017; Received: March 6, 2017;
A literature review of reports of the stability and storage of common injectable chemotherapy agents used in veterinary patients
Many chemotherapy drugs used in human patients are discarded after single use or within 24 h of reconstitution, as per the manufacturer's product label recommendations. This can be wasteful and costly to veterinary clients. This report reviews the published stability and storage data for 19 injectable chemotherapy drugs commonly used in veterinary medicine.
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