Varun Kashyap

ORCID: 0000-0003-0368-6389
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About
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Research Areas
  • Solar-Powered Water Purification Methods
  • Dental materials and restorations
  • Surface Modification and Superhydrophobicity
  • Heat Transfer and Boiling Studies
  • Solar Thermal and Photovoltaic Systems
  • Space Satellite Systems and Control
  • Head and Neck Surgical Oncology
  • Advanced Sensor and Energy Harvesting Materials
  • Heat Transfer and Optimization
  • Adhesion, Friction, and Surface Interactions
  • Neurological disorders and treatments
  • Aortic Disease and Treatment Approaches
  • Central Venous Catheters and Hemodialysis
  • Dental Research and COVID-19
  • Icing and De-icing Technologies
  • Marine Ecology and Invasive Species
  • Malaria Research and Control
  • Muscle activation and electromyography studies
  • Wireless Body Area Networks
  • Empathy and Medical Education
  • Anatomy and Medical Technology
  • Electrical and Bioimpedance Tomography
  • Carbon Dioxide Capture Technologies
  • Calcium Carbonate Crystallization and Inhibition
  • Phase Equilibria and Thermodynamics

Medtronic (United States)
2022-2025

Uttaranchal University
2024

Jamia Hamdard
2022

Institute of Medical Sciences
2022

Weill Cornell Medicine
2020-2021

Cornell University
2020-2021

University of Houston
2017-2020

Manipal Academy of Higher Education
2016

A flexible scalable anti-clogging graphite film for efficient solar desalination is demonstrated with long-term performance.

10.1039/c7ta03977h article EN Journal of Materials Chemistry A 2017-01-01

We introduce and present the fundamentals of stress-localization concept to minimize adhesion ice or other contaminants on a surface.

10.1039/c8mh01291a article EN Materials Horizons 2019-01-01

Recently, the solar heat localization concept has provided an appealing route for efficient utilization of thermal energy. A detailed study is conducted on this highlighting figures merit various applications.

10.1039/d0ta01004a article EN Journal of Materials Chemistry A 2020-01-01

Scale formation is a common problem in wide range of industries such as oil and gas, water desalination, food processing. Conventional solutions for this including mechanical removal chemical dissolution are inefficient, costly, sometimes environmentally hazardous. Surface modification approaches have shown promises to address challenge. However, these suffer from intrinsic existence solid–liquid interfaces leading high rate scale nucleation adhesion strength the formed scale. Here, we...

10.1021/acsami.7b05564 article EN ACS Applied Materials & Interfaces 2017-05-31

To the Editor: We were encouraged by Dr Ioannis Mavridis's letter1 regarding our recent publication, Feasibility of Endovascular Deep Brain Stimulation Anterior Nucleus Thalamus for Refractory Epilepsy,2 and appreciate his expert perspective on findings. Having seen results in vivo model firsthand, we certainly share enthusiasm potential long-range implication The concept using an endovascular approach to deliver deep brain stimulation (DBS) has been subject discussion preliminary...

10.1227/ons.0000000000001541 article EN Operative Neurosurgery 2025-03-07

Evaporation is a fundamental and core phenomenon in broad range of disciplines including power generation refrigeration systems, desalination, electronic/photonic cooling, aviation even biosciences. Despite its importance, the current theories on evaporation suffer from fitting coefficients with reported values varying few orders magnitude. Lack sound model impedes simulation prediction characteristics many systems these disciplines. Here, we studied at planar liquid–vapor interface through...

10.1021/acs.langmuir.8b02289 article EN Langmuir 2018-09-06

Advancement in high-performance photonics/electronics devices has boosted generated thermal energy, making management a bottleneck for accelerated innovation these disciplines. Although various methods have been used to tackle the problem, evaporation with nanometer fluid thickness is one of most promising approaches future technological demands. Here, we studied thin-film nanochannels under absolute negative pressure both transient and steady-state conditions. We demonstrated that can be...

10.1021/acs.langmuir.8b03463 article EN Langmuir 2018-12-14

Heat dissipation from hot surfaces through cooling droplets is limited by the Leidenfrost point (LFP), in which an insulating vapor film prevents direct contact between droplet and surface. A range of approaches have been developed to raise this limit higher temperatures, but still exists. Recently, a surface architecture, decoupled hierarchical structure, was that allows suppression LFP completely. However, heat structure low superheat region inferior other required extensive micro/nano...

10.1063/1.4993775 article EN publisher-specific-oa Applied Physics Letters 2017-07-10

Soft robotic sensor arrays for left-atrial mapping demonstrate highly conformal contact to complex patient anatomies.

10.1126/sciadv.abc6800 article EN cc-by-nc Science Advances 2020-11-13

BACKGROUND AND OBJECTIVES: Deep brain stimulation (DBS) has developed into an effective therapy for several disease states including treatment-resistant Parkinson and medically intractable essential tremor, as well segmental, generalized cervical dystonia, obsessive-compulsive disorder (OCD). Dystonia OCD are approved with Humanitarian Device Exemption. In addition, DBS is also the treatment of epilepsy in anterior nucleus thalamus. Although overall considered epilepsy, a number specific...

10.1227/ons.0000000000001226 article EN cc-by-nc-nd Operative Neurosurgery 2024-06-13

Growing demands for bio-friendly antifouling surfaces have stimulated the development of new and ever-improving material paradigms. Despite notable progress in coatings, biofouling problem remains a critical challenge. In addition to characteristics, mechanically stressed such as ship hulls, piping systems, heat exchangers require long-term durability marine environments. Here, we introduce generation anti-biofouling coatings with superior characteristics high mechanical, chemical...

10.1039/c9sm00790c article EN Soft Matter 2019-01-01

Reusable material for CO<sub>2</sub> capture <italic>via</italic> localized solar heat and its subsequent conversion to calcium carbonate water.

10.1039/c8se00546j article EN Sustainable Energy & Fuels 2018-11-14

Gas hydrate formation is a high-risk and common flow assurance problem in subsea oil production plants. The modern strategies to mitigate have switched from thermodynamic inhibition risk management. In this new mitigation strategy, allowed as long it does not lead plugging of pipelines. Thus, understanding the growth kinetics gas hydrates plays critical role management strategies. Here, we report accurate situ approach probe formation. This based on hot-wire method, which probes thermal...

10.1063/1.5082333 article EN Review of Scientific Instruments 2019-03-01

This paper presents the design, fabrication, and test results for a novel basket catheter that utilizes soft robotic technology, which can conform to complex patient anatomy. Two designs of basket-shaped balloons in three sizes are fabricated based on CO2 laser cutting method from thin (<50 µm) thermoplastic polyurethane. The deployed four soft-material 3D printed left atria, whose geometries volume rendered segmentation cardiac computed tomography (CT) scans. coverage conformability...

10.1002/adhm.201900951 article EN Advanced Healthcare Materials 2020-01-16

The Accredited Social Health Activists (ASHAs) and Auxiliary Nurse Midwives (ANMs) are the frontline health staff that provide essential care services, including diagnosis treatment of malaria. To support India's malaria-free goal by 2030, a project known as Malaria Elimination Demonstration Project (MEDP) in tribal district Mandla was initiated. This study assessed capabilities ASHAs ANMs to diagnose treat malaria.A cross-sectional conducted 71 sub-centers their villages where at least one...

10.4103/jfmpc.jfmpc_1005_22 article EN cc-by-nc-sa Journal of Family Medicine and Primary Care 2022-11-01

Aim and Objective: The aim objective are to evaluate the effect of prophylactic agents on surface morphology different types orthodontic wires dimensions at two temperatures. Materials Methods: Stainless steel (SS), NiTi, titanium-molybdenum alloy (TMA) 0.016 inch round 0.017 × 0.025-inch were immersed in such as 0.2% NaF, CHx 1.23% APF for 1.5 h 37°C 45°C. A one-way analysis variance, Bonferroni test, intraclass correlation coefficient test was performed eliminate bias. Scanning electron...

10.4103/ijds.ijds_148_23 article EN cc-by-nc-sa Indian Journal of Dental Sciences 2024-01-01

Malocclusion refers to the misalignment of teeth, which can result from various factors such as genetics or environmental influences like thumb sucking, mouth breathing, over-retained deciduous early tooth loss, and arch length deficiency. In India, prevalence malocclusion ranges between 20% 43%, making it one most common dental issues. Its consequences include functional impairments, difficulty in chewing, speech problems, aesthetic concerns, have psychological effects. is also often linked...

10.51220/jmr.v19-i2.17 article EN Journal of Mountain Research 2024-01-01

This paper describes the software in loop test bed developed order to control system of a tethered nano-satellite simulated under de-orbiting conditions. The entire ADCS architecture satellite along with descriptions individual models constituting Software in-the bed, such as descent modeling algorithm, sun model, eclipse disturbance torques quaternion estimation algorithm and designs have been presented. results analyzed described paper.

10.1109/aero.2016.7500603 article EN IEEE Aerospace Conference 2016-03-01

Correction for ‘Stress-localized durable icephobic surfaces’ by Peyman Irajizad <italic>et al.</italic>, <italic>Mater. Horiz.</italic>, 2019, <bold>6</bold>, 758–766, DOI: 10.1039/C8MH01291A.

10.1039/d0mh90077j article EN cc-by Materials Horizons 2020-01-01

Background: Virtual functional assessment index (vFAI), an alternative approach for assessing hemodynamic significance of stenosis has been shown to enhance the diagnostic performance coronary computed tomography angiography (CCTA) based on evaluating area under pressure drop-flow curve a stenosis. Previously, this was assessed via computational fluid dynamics. We investigated evaluation vFAI from CCTA images using 3D printing and in vitro flow loop its efficacy as compared invasively...

10.1161/circ.142.suppl_3.17031 article EN Circulation 2020-11-17

Flexible electronics have found a wide variety of applications, especially in biomedical engineering, where their intrinsic safety and conformability provide for configurations sensors actuators that can accommodate complex anatomies movement. Current scalable techniques the manufacture flexible are limited by challenges working with novel, intrinsically stretchable materials, or using cost‐intensive clean room fabrication needed to create strain accommodating geometries. Recently, technique...

10.1002/adem.202100599 article EN Advanced Engineering Materials 2021-07-20

This paper demonstrates the use of xPC Target system to simulate space environment for testing and verifying control algorithms a nano satellite. Setup includes Host connected via an appropriately selected communication link. is data acquisition card through PCI bus. In this paper, satellite with magnetic actuation using magnetorquers considered. proposed setup, Simulink used in model three sensors - GPS, sun sensor magnetometer. The designed predicts real time values spacecraft. These...

10.1109/aero.2016.7500664 article EN IEEE Aerospace Conference 2016-03-01
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