Publications by authors named "Yash D Shah"

This paper presents a high-resolution, single-photon LiDAR imaging camera capable of performing simultaneous depth and color estimation. It features a time-gated CMOS single-photon avalanche diode detector array with a large fill-factor, integrated with a metasurface-based plasmonic color filter array for three-dimensional color imaging. A sliding detector gate enables millimeter-scale depth resolution using as few as two binary planes per step, and high-fidelity color reconstruction is demonstrated from as few as two photons per pixel.

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Article Synopsis
  • In modern dentistry, the focus has shifted towards preventing cavities, with pit and fissure sealants (PFS) being a key method to avoid the buildup of plaque in hard-to-reach areas of teeth.
  • The study aimed to compare the effectiveness of dentin bonding agents (DBA) alone or with a procedure called fissurotomy in reducing microleakage before applying PFS on freshly extracted premolars.
  • Results indicated that using both fissurotomy and DBA (Group 4) resulted in the least microleakage, while the conventional PFS method (Group 1) had significantly higher microleakage scores, highlighting the benefits of combining techniques for better outcomes.
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Introduction: Fixed functional appliances are widely used for the treatment of retrognathic mandibles in skeletal class II malocclusion. The primary objective of the present investigation was to evaluate and compare the treatment effects induced by PowerScope (American Orthodontics, Sheboygan, WI) and AdvanSync2 (Ormco, Orange, CA). The hypothesis posited that there were no notable disparities in the therapeutic impacts of the two appliances.

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This paper outlines an experimental demonstration of a Bayesian image reconstruction approach to achieve rapid single-photon color imaging of moving objects. The capacity to extract the color of objects is important in a variety of target identification and computer vision applications. Nonetheless, it remains challenging to achieve high-speed color imaging of moving objects in low-photon flux environments.

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The polarization state of light is a key parameter in many imaging systems. For example, it can image mechanical stress and other physical properties that are not seen with conventional imaging and can also play a central role in quantum sensing. However, polarization is more difficult to image, and polarimetry typically involves several independent measurements with moving parts in the measurement device.

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Objective: We explored the efficacy and safety profile of cenobamate as an adjunctive therapy in patients with refractory focal-onset epilepsy in the pediatric population.

Methods: This was a retrospective, single-center study of cenobamate used as an adjunctive medication in pediatric patients with refractory focal-onset epilepsy . We measured seizure reduction, median reduction in seizure frequency, median dose, responder rate, and treatment-emergent adverse events.

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Acute neurological complications from COVID-19 have been reported in both pediatric and adult populations. Chronic symptoms after recovery have been reported in adults and can include neuropsychiatric and sleep symptoms. Persistent symptoms in children with the multisystem inflammatory syndrome in children (MIS-C) have not been studied.

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New-onset refractory status epilepticus (NORSE) describes prolonged or recurring new onset seizures which fail to respond to antiseizure medications. NORSE poses a challenge in diagnosis and treatment, and limited high-quality evidence exists to guide management. The efficacy of Electroconvulsive therapy (ECT) in aborting refractory status epilepticus has been described in case reports, but its application remains uncommon, particularly in young children.

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There is a global unmet need for rapid and cost-effective prognostic and diagnostic tools that can be used at the bedside or in the doctor's office to reduce the impact of serious disease. Many cancers are diagnosed late, leading to costly treatment and reduced life expectancy. With prostate cancer, the absence of a reliable test has inhibited the adoption of screening programs.

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Objective: To describe inpatient length of stay patterns, identify key drivers related to prolonged length of stay, and evaluate the relationship between length of stay and readmission in pediatric neurology.

Methods: This was a retrospective review of patients <19 years old admitted with a principal neurologic diagnosis to our hospital between January 2017 and July 2019. Scheduled admissions and hospital admissions lasting >30 days were excluded from analysis.

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We present the first realisation of simultaneous multi-spectral fluorescence imaging using a single-photon avalanche diode (SPAD) array, where the spectral unmixing is facilitated by a plasmonic metasurface mosaic colour filter array (CFA). A 64 × 64 pixel format silicon SPAD array is used to record widefield fluorescence and brightfield data from four biological samples. A plasmonic metasurface composed of an arrangement of circular and elliptical nanoholes etched into an aluminium thin film deposited on a glass substrate provides the high transmission efficiency CFA, enabling a bespoke spectral unmixing algorithm to reconstruct high fidelity, full colour images from as few as ∼3 photons per pixel.

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Background: Early hospital discharge is an important quality improvement (QI) measure that has not been well studied in pediatric neurology. The objective of our study was to implement strategies to improve hospital discharge times for patients admitted to the pediatric neurology service.

Methods: This was a pilot QI study of hospital discharge before noon (DBN) in pediatric neurology patients admitted to a tertiary care children's hospital.

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Background: There is limited data available on the safety of therapeutic plasma exchange (TPE) for paediatric neuro-immunological disorders (PNID). In this study, we report our data on safety and feasibility of TPE for these disorders.

Methods: Retrospective chart review was performed to include all patient who received TPE for four major PNID conditions: autoimmune encephalitis (AIE), acute disseminated encephalomyelitis (ADEM), Neuromyelitis optic spectrum disorder (NMOSD) and transverse myelitis (TM).

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Study Objectives: Pediatric insomnia is a widespread problem and especially difficult to manage in children with neurodevelopmental disorders. There are currently no US Food and Drug Administration-approved medications to use once first-line therapy fails. The objective of this study was to evaluate the efficacy and tolerability of doxepin in pediatric patients.

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Advances in continuous manufacturing in the pharmaceutical industry necessitate reliable process monitoring systems that are capable of handling measurement errors inherent in all sensor technologies and detecting measurement outliers to ensure operational reliability. The purpose of this work was to demonstrate data reconciliation (DR) and gross error detection methods as real-time process management tools to accomplish robust process monitoring. DR mitigates the effects of random measurement errors, while gross error detection identifies nonrandom sensor malfunctions.

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We experimentally demonstrate a CMOS compatible medium wave infrared metal-insulator-metal (MIM) metamaterial absorber structure where for a single dielectric spacer thickness at least 93% absorption is attained for 10 separate bands centred at 3.08, 3.30, 3.

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Background: Ethnic differences in lipid profiles exist in children and adolescents. This study assessed whether variations in lipid profiles present in overweight and obese youth were also observed in severely obese youth. Variations could explain the lower prevalence of the metabolic syndrome in certain ethnic groups at even severe levels of obesity.

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Introduction: Perampanel is an AMPA receptor antagonist recently approved for the treatment of partial and generalized epilepsies with tonic-clonic seizures as an add-on therapy.

Methods: This single-center postmarketing study retrospectively evaluated the efficacy of perampanel in patients with partial onset and other seizure types, with a special emphasis on its efficacy, safety, and tolerability.

Results: Review of medical records revealed that adequate data were available on 101 patients taking perampanel.

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Introduction: Felbamate was approved in 1993 to treat partial seizures with and without secondary generalization in adults and in Lennox-Gastaut Syndrome in children. Its use was later restricted when rare but fatal cases of aplastic anemia and hepatic failure were identified.

Methods: This single center analysis retrospectively evaluated the safety and efficacy of felbamate in a cohort of children, adolescents, and adults with epilepsy.

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Split-ring resonators represent the ideal route to achieve optical control of the incident light at THz frequencies. These subwavelength metamaterial elements exhibit broad resonances that can be easily tuned lithographically. We have realized a design based on the interplay between the resonances of metallic split rings and the electronic properties of monolayer graphene integrated in a single device.

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In this paper, a four-point characterization method is developed for samples that have either capacitive or ohmic contacts. When capacitive contacts are used, capacitive current- and voltage-dividers result in a capacitive scaling factor not present in four-point measurements with only ohmic contacts. From a circuit equivalent of the complete measurement system, one can determine both the measurement frequency band and capacitive scaling factor for various four-point characterization configurations.

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