Johnny Nguyen

ORCID: 0000-0003-2676-6568
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About
Contact & Profiles
Research Areas
  • Respiratory Support and Mechanisms
  • Microfluidic and Bio-sensing Technologies
  • Microplastics and Plastic Pollution
  • Infection Control and Ventilation
  • Mercury impact and mitigation studies
  • Magnetic and Electromagnetic Effects
  • Recycling and Waste Management Techniques
  • Advanced Radiotherapy Techniques
  • Electrohydrodynamics and Fluid Dynamics
  • Radiation Therapy and Dosimetry
  • IoT-based Smart Home Systems
  • Water Quality Monitoring and Analysis
  • Advanced Manufacturing and Logistics Optimization
  • Electrowetting and Microfluidic Technologies
  • Manufacturing Process and Optimization
  • Ear and Head Tumors
  • Polyomavirus and related diseases
  • Pleural and Pulmonary Diseases
  • Tumors and Oncological Cases
  • Foreign Body Medical Cases
  • Long-Term Effects of COVID-19
  • Obstructive Sleep Apnea Research
  • Inhalation and Respiratory Drug Delivery
  • Micro and Nano Robotics
  • Robotic Mechanisms and Dynamics

Philipps University of Marburg
2020-2023

Regional Medical Center
2021-2022

Nestlé (France)
2020

University College London
2016-2019

Heidelberg University
2014-2017

University Medical Centre Mannheim
2017

University Hospital Heidelberg
2017

Massachusetts General Hospital
2014

Institut Gustave Roussy
1994

This study discusses weathering-induced oxidation of polystyrene with and without different concentrations the antioxidant Irgafos using Laser-induced Breakdown Spectroscopy (LIBS). By examining spectral feature due to laser ablation, a systematical analysis oxygen content on sample's surface its penetration depth could be conducted. The results show that LIBS can used as fast technique for quantification oxidation.

10.1016/j.polymertesting.2022.107623 article EN cc-by-nc-nd Polymer Testing 2022-05-12

Theoretical dose-response models offer the possibility to assess second cancer induction risks after external beam therapy. The parameters used in these are determined with limited data from epidemiological studies. Risk estimations thus associated considerable uncertainties. This study aims at illustrating uncertainties when predicting risk for organ-specific cancers primary radiation field illustrated by choosing selected treatment plans brain patients.

10.1118/1.4903272 article EN Medical Physics 2014-12-17

Graphite is an inexpensive material with useful electrical, magnetic, thermal, and optical properties. It also biocompatible used universally as a substrate. Micrometer-sized graphitic particles in solution are therefore ideal candidates for novel lab-on-a-chip remote manipulation applications biomedicine, biophysics, chemistry, condensed-matter physics. However, submerged graphite not known to be amenable magnetic manipulation, the optimal method such applications. Here, we exploit...

10.1073/pnas.1817989116 article EN cc-by Proceedings of the National Academy of Sciences 2019-01-25

Abstract A quantitative understanding of the worldwide plastics distribution is required not only to assess extent and possible impact plastic litter on environment but also identify counter measures. systematic collection data characterizing amount composition has be based two crucial components: (i) An experimental approach that simple enough accessible sensible capture diversity plastics; (ii) analysis pipeline able extract relevant parameters from vast data. In this study, we demonstrate...

10.1038/s41598-022-23414-3 article EN cc-by Scientific Reports 2022-11-06

We demonstrate, for the first time, confinement of orientation graphitic micro-flakes to a well-defined plane in solution by applying two perpendicular fields: vertical static magnetic field and horizontal time-varying electric field.

10.1039/c6ra07657b article EN cc-by RSC Advances 2016-01-01

As part of a plethora global efforts to minimize the negative effects SARS-CoV2 (COVID-19) pandemic, we developed two different mechanisms that, after further development, could potentially be use in future order increase capacity ventilators with low-cost devices based on single-use-bag-valve mask systems. We describe concept behind and report characterization them. Finally, make description solved unsolved challenges propose series measures better cope contingencies.

10.3390/app10207229 article EN cc-by Applied Sciences 2020-10-16

Abstract The worldwide shortage of medical-grade ventilators is a well-known issue, that has become one the central topics during COVID-19 pandemic. Given these machines are expensive and have long lead times, approach to vacate them for patients in critical conditions while with mild moderate symptoms treated stripped-down ventilators. We propose mass-producible solution can create such minimum effort. part module be attached CPAP repurpose as low-pressure Here, we describe concept first...

10.1038/s41598-021-91673-7 article EN cc-by Scientific Reports 2021-06-09

ABSTRACT As part of a plethora global efforts to minimize the negative effects SARS-CoV2 (COVID-19) pandemic, we developed two different mechanisms that, after further development, could potentially be use in future order increase capacity ventilators with low-cost devices based on single-use-bag-valve mask systems. We describe concept behind and report characterization them. Finally, make description solved unsolved challenges propose series measures better cope contingencies.

10.1101/2020.04.29.20084749 preprint EN cc-by medRxiv (Cold Spring Harbor Laboratory) 2020-05-05

Abstract The worldwide shortage of medical-grade ventilators is a well-known issue, that has become one the central topics during COVID-19 pandemic. Given these machines are expensive and have long lead times, approach to vacate them for patients in critical conditions while with mild moderate symptoms treated stripped-down ventilators. We propose mass-producible solution can create such minimum effort. part module be attached CPAP repurpose as low-pressure Here, we describe concept first...

10.21203/rs.3.rs-83143/v1 preprint EN cc-by Research Square (Research Square) 2020-09-29
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