keyword
MENU ▼
Read by QxMD icon Read
search

Electromagnetic Radiation

keyword
https://www.readbyqxmd.com/read/28211479/decoupling-absorption-and-emission-processes-in-super-resolution-localization-of-emitters-in-a-plasmonic-hotspot
#1
David L Mack, Emiliano Cortés, Vincenzo Giannini, Peter Török, Tyler Roschuk, Stefan A Maier
The absorption process of an emitter close to a plasmonic antenna is enhanced due to strong local electromagnetic (EM) fields. The emission, if resonant with the plasmonic system, re-radiates to the far-field by coupling with the antenna via plasmonic states, whose presence increases the local density of states. Far-field collection of the emission of single molecules close to plasmonic antennas, therefore, provides mixed information of both the local EM field strength and the local density of states. Moreover, super-resolution localizations from these emission-coupled events do not report the real position of the molecules...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28208709/human-exposure-to-electromagnetic-fields-from-parallel-wireless-power-transfer-systems
#2
Feng Wen, Xueliang Huang
The scenario of multiple wireless power transfer (WPT) systems working closely, synchronously or asynchronously with phase difference often occurs in power supply for household appliances and electric vehicles in parking lots. Magnetic field leakage from the WPT systems is also varied due to unpredictable asynchronous working conditions. In this study, the magnetic field leakage from parallel WPT systems working with phase difference is predicted, and the induced electric field and specific absorption rate (SAR) in a human body standing in the vicinity are also evaluated...
February 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28208417/terahertz-generation-from-laser-driven-ultrafast-current-propagation-along-a-wire-target
#3
H B Zhuo, S J Zhang, X H Li, H Y Zhou, X Z Li, D B Zou, M Y Yu, H C Wu, Z M Sheng, C T Zhou
Generation of intense coherent THz radiation by obliquely incidenting an intense laser pulse on a wire target is studied using particle-in-cell simulation. The laser-accelerated fast electrons are confined and guided along the surface of the wire, which then acts like a current-carrying line antenna and under appropriate conditions can emit electromagnetic radiation in the THz regime. For a driving laser intensity ∼3×10^{18}W/cm^{2} and pulse duration ∼10 fs, a transient current above 10 KA is produced on the wire surface...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28203122/evaluation-of-the-effect-of-radiofrequency-radiation-emitted-from-wi-fi-router-and-mobile-phone-simulator-on-the-antibacterial-susceptibility-of-pathogenic-bacteria-listeria-monocytogenes-and-escherichia-coli
#4
M Taheri, S M J Mortazavi, M Moradi, S Mansouri, G R Hatam, F Nouri
Mobile phones and Wi-Fi radiofrequency radiation are among the main sources of the exposure of the general population to radiofrequency electromagnetic fields (RF-EMF). Previous studies have shown that exposure of microorganisms to RF-EMFs can be associated with a wide spectrum of changes ranged from the modified bacterial growth to the alterations of the pattern of antibiotic resistance. Our laboratory at the nonionizing department of the Ionizing and Non-ionizing Radiation Protection Research Center has performed experiments on the health effects of exposure to animal models and humans to different sources of electromagnetic fields such as cellular phones, mobile base stations, mobile phone jammers, laptop computers, radars, dentistry cavitrons, magnetic resonance imaging, and Helmholtz coils...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28199121/smart-contact-lenses-with-graphene-coating-for-electromagnetic-interference-shielding-and-dehydration-protection
#5
Sangkyu Lee, Insu Jo, Sangmin Kang, Bongchul Jang, Joonhee Moon, Jong Bo Park, Soochang Lee, Sichul Rho, Youngsoo Kim, Byung Hee Hong
Recently, smart contact lenses with electronic circuits have been proposed for various sensor and display applications, where the use of flexible and biologically stable electrode materials is essential. Graphene is an atomically thin carbon materials with 2-dimensional hexagonal lattice, showing outstanding electrical and mechanical properties as well as excellent biocompatibility. In addition, graphene is capable of protecting eyes from electromagnectic (EM) waves that may cause eye diseases such as cataracts...
February 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/28186865/preventing-electromagnetic-pulse-irradiation-damage-on-testis-using-selenium-rich-cordyceps-fungi-a-preclinical-study-in-young-male-mice
#6
Xia Miao, Yafeng Wang, Haiyang Lang, Yanyun Lin, Qiyan Guo, Mingjuan Yang, Juan Guo, Yanjun Zhang, Jie Zhang, Junye Liu, Yaning Liu, Lihua Zeng, Guozhen Guo
Networked 21st century society, globalization, and communications technologies are paralleled by the rise of electromagnetic energy intensity in our environments and the growing pressure of the environtome on human biology and health. The latter is the entire complement of environmental factors, including the electromagnetic energy and the technologies that generate them, enacting on the digital citizen in the new century. Electromagnetic pulse (EMP) irradiation might have serious damaging effects not only on electronic equipment but also in the whole organism and reproductive health, through nonthermal effects and oxidative stress...
February 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28186806/casimir-forces-and-quantum-friction-from-ginzburg-radiation-in-atomic-bose-einstein-condensates
#7
Jamir Marino, Alessio Recati, Iacopo Carusotto
We theoretically propose an experimentally viable scheme to use an impurity atom in an atomic Bose-Einstein condensate, in order to realize condensed-matter analogs of quantum vacuum effects. In a suitable atomic level configuration, the collisional interaction between the impurity atom and the density fluctuations in the condensate can be tailored to closely reproduce the electric-dipole coupling of quantum electrodynamics. By virtue of this analogy, we recover and extend the paradigm of electromagnetic vacuum forces to the domain of cold atoms, showing in particular the emergence, at supersonic atomic speeds, of a novel power-law scaling of the Casimir force felt by the atomic impurity, as well as the occurrence of a quantum frictional force, accompanied by the Ginzburg emission of Bogoliubov quanta...
January 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28174678/surface-plasmon-resonance-effect-in-inverted-perovskite-solar-cells
#8
Jin Cui, Cheng Chen, Junbo Han, Kun Cao, Wenjun Zhang, Yan Shen, Mingkui Wang
This work reports on incorporation of spectrally tuned gold/silica (Au/SiO2) core/shell nanospheres and nanorods into the inverted perovskite solar cells (PVSC). The band gap of hybrid lead halide iodide (CH3NH3PbI3) can be gradually increased by replacing iodide with increasing amounts of bromide, which can not only offer an appreciate solar radiation window for the surface plasmon resonance effect utilization, but also potentially result in a large open circuit voltage. The introduction of localized surface plasmons in CH3NH3PbI2...
March 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28166058/time-constants-for-temperature-elevation-in-human-models-exposed-to-dipole-antennas-and-beams-in-the-frequency-range-from-1-to-30-ghz
#9
Ryota Morimoto, Akimasa Hirata, Ilkka Laakso, Marvin C Ziskin, Kenneth R Foster
This study computes the time constants of the temperature elevations in human head and body models exposed to simulated radiation from dipole antennas, electromagnetic beams, and plane waves. The frequency range considered is from 1 to 30 GHz. The specific absorption rate distributions in the human models are first computed using the finite-difference time-domain method for the electromagnetics. The temperature elevation is then calculated by solving the bioheat transfer equation. The computational results show that the thermal time constants (defined as the time required to reach 63% of the steady state temperature elevation) decrease with the elevation in radiation frequency...
March 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28164384/design-of-organic-macrocycle-modified-iron-oxide-nanoparticles-for-drug-delivery
#10
Ali Trabolsi, Tina Skorjanc, Farah Benyettou, John-Carl Olsen
Paul Ehrlich's vision of a "magic bullet" cure for disease inspires the modern design of nanocarriers whose purpose is to deliver drug cargo to specific sites in the body while circumventing endogenous immunological clearance mechanisms. Iron-oxide nanoparticles (IONPs) have emerged as particularly promising nanocarriers because of their biodegradability, ability to be guided magnetically to sites of pathology, mediation of hyperthermic therapy and imaging capabilities. In this review, we focus on the design and drug-delivery aspects of IONPs coated with organic macrocycles (crown ethers, cyclodextrins, calix[n]arenes, cucurbit[n]urils, or pillar[n]arenes) which, by means of reversible complexation, allow for the convenient loading and release of drug molecules...
February 5, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28158028/light-scattering-computation-model-for-nonspherical-aerosol-particles-based-on-multi-resolution-time-domain-scheme-model-development-and-validation
#11
Shuai Hu, Taichang Gao, Hao Li, Bo Yang, Feng Zhang, Ming Chen, Lei Liu
Due to the inadequate understanding of the scattering properties of nonspherical aerosols, considerable uncertainties still exist in the radiative transfer numerical simulation. To this end, a new scattering model for nonspherical aerosols is established based on Multi-Resolution Time-Domain (MRTD) scheme. The model is comprised of three modules: near field calculation module, near-to-far transformation module and scattering parameters computation module, in which, the near electromagnetic field is calculated by MRTD technique, the near-to-far transformation scheme is performed by volume integral method, and the calculation models for extinction and absorption cross section are directly derived from Maxwell's curl equations in the frequency domain...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28153669/coffee-and-tea-consumption-and-risk-of-leukaemia-in-an-adult-population-a-reanalysis-of-the-italian-multicentre-case-control-study
#12
Stefano Parodi, Domenico Franco Merlo, Emanuele Stagnaro
BACKGROUND: Coffee and tea are the most frequently consumed beverages in the world. Their potential effect on the risk of developing different types of malignancies has been largely investigated, but studies on leukaemia in adults are scarce. METHODS: The present investigation is aimed at evaluating the potential role of regular coffee and tea intake on the risk of adult leukaemia by reanalysing a large population based case-control study carried out in Italy, a country with a high coffee consumption and a low use of green tea...
January 30, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28149063/acute-effects-of-mobile-phone-radiations-on-subtle-energy-levels-of-teenagers-using-electrophotonic-imaging-technique-a-randomized-controlled-study
#13
Hemant Bhargav, T M Srinivasan, Suman Bista, A Mooventhan, Vandana Suresh, Alex Hankey, H R Nagendra
BACKGROUND: Mobile phones induce radio frequency electromagnetic field (RF-EMF) which has been found to affect subtle energy levels of adults through Electrophotonic Imaging (EPI) technique in a previous pilot study. MATERIALS AND METHODS: We enrolled 61 healthy right-handed healthy teenagers (22 males and 39 females) in the age range of 17.40 ± 0.24 years from educational institutes in Bengaluru. Subjects were randomly divided into two groups: (1) (mobile phone in ON mode [MPON] at right ear) and (2) mobile phone in OFF mode (MPOF)...
January 2017: International Journal of Yoga
https://www.readbyqxmd.com/read/28145486/photoacoustic-sounds-from-meteors
#14
Richard Spalding, John Tencer, William Sweatt, Benjamin Conley, Roy Hogan, Mark Boslough, GiGi Gonzales, Pavel Spurný
Concurrent sound associated with very bright meteors manifests as popping, hissing, and faint rustling sounds occurring simultaneously with the arrival of light from meteors. Numerous instances have been documented with -11 to -13 brightness. These sounds cannot be attributed to direct acoustic propagation from the upper atmosphere for which travel time would be several minutes. Concurrent sounds must be associated with some form of electromagnetic energy generated by the meteor, propagated to the vicinity of the observer, and transduced into acoustic waves...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28144597/the-fundamental-reasons-why-laptop-computers-should-not-be-used-on-your-lap
#15
S A R Mortazavi, S Taeb, S M J Mortazavi, S Zarei, M Haghani, P Habibzadeh, M B Shojaei-Fard
As a tendency to use new technologies, gadgets such as laptop computers are becoming more popular among students, teachers, businessmen and office workers. Today laptops are a great tool for education and learning, work and personal multimedia. Millions of men, especially those in the reproductive age, are frequently using their laptop computers on the lap (thigh). Over the past several years, our lab has focused on the health effects of exposure to different sources of electromagnetic fields such as cellular phones, mobile base stations, mobile phone jammers, laptop computers, radars, dentistry cavitrons and Magnetic Resonance Imaging (MRI)...
December 2016: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28144594/effects-of-rf-emf-exposure-from-gsm-mobile-phones-on-proliferation-rate-of-human-adipose-derived-stem-cells-an-in-vitro-study
#16
D Shahbazi-Gahrouei, B Hashemi-Beni, Z Ahmadi
BACKGROUND: As the use of mobile phones is increasing, public concern about the harmful effects of radiation emitted by these devices is also growing. In addition, protection questions and biological effects are among growing concerns which have remained largely unanswered. Stem cells are useful models to assess the effects of radiofrequency electromagnetic fields (RF-EMF) on other cell lines. Stem cells are undifferentiated biological cells that can differentiate into specialized cells...
December 2016: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28124386/quantitative-changes-in-testicular-structure-and-function-in-rat-exposed-to-mobile-phone-radiation
#17
M Çetkin, N Kızılkan, C Demirel, Z Bozdağ, S Erkılıç, H Erbağcı
The possible effects of the electromagnetic fields (EMF) generated by mobile phones on reproductive functions have been discussed in recent years. The aim of this study was to evaluate the effects of EMF emitted from mobile phones on the rat testis morphology and histopathology using stereological techniques. We also investigated cortisol, testosterone, FSH and LH levels. A total of thirty-two (n = 32) male Wistar albino rats were used in this study. Animals were randomly divided into four groups as control (C, n = 8), sham (Sh, n = 8), mobile phone speech (Sp, n = 8) and mobile phone standby (ST by)...
January 26, 2017: Andrologia
https://www.readbyqxmd.com/read/28113068/symptoms-and-the-use-of-wireless-communication-devices-a-prospective-cohort-study-in-swiss-adolescents
#18
Anna Schoeni, Katharina Roser, Martin Röösli
BACKGROUND: We investigated whether radiofrequency electromagnetic fields (RF-EMF) from mobile phones and other wireless devices or by the wireless device use itself due to non-radiation related factors in that context are associated with an increase in health symptom reports of adolescents in Central Switzerland. METHODS: In a prospective cohort study, 439 study participants (participation rate: 36.8%) aged 12-17 years, completed questionnaires about their mobile and cordless phone use, their self-reported symptoms and possible confounding factors at baseline (2012/2013) and one year later (2013/2014)...
January 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/28112234/coherent-terahertz-radiation-from-multiple-electron-beams-excitation-within-a-plasmonic-crystal-like-structure
#19
Yaxin Zhang, Yucong Zhou, Yin Gang, Guili Jiang, Ziqiang Yang
Coherent terahertz radiation from multiple electron beams excitation within a plasmonic crystal-like structure (a three-dimensional holes array) which is composed of multiple stacked layers with 3 × 3 subwavelength holes array has been proposed in this paper. It has been found that in the structure the electromagnetic fields in each hole can be coupled with one another to construct a composite mode with strong field intensity. Therefore, the multiple electron beams injection can excite and efficiently interact with such mode...
January 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28112217/scattering-forces-within-a-left-handed-photonic-crystal
#20
Angeleene S Ang, Sergey V Sukhov, Aristide Dogariu, Alexander S Shalin
Electromagnetic waves are known to exert optical forces on particles through radiation pressure. It was hypothesized previously that electromagnetic waves inside left-handed metamaterials produce negative radiation pressure. Here we numerically examine optical forces inside left-handed photonic crystals demonstrating negative refraction and reversed phase propagation. We demonstrate that even though the direction of force might not follow the flow of energy, the positive radiation pressure is maintained inside photonic crystals...
January 23, 2017: Scientific Reports
keyword
keyword
45988
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"