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Articoli di riviste sul tema "Radiation"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Renwick, Bryce, Nimra Zaidi, Marta Madurska, Khalid Irshad, Donald Bain, and Donald Reid. "RADIATION PROTECTION IN COMPLEX ENDOVASCULAR PROCEDURES." International Journal of Surgery and Medicine 3, no. 1 (2017): 1. http://dx.doi.org/10.5455/ijsm.endovascular-radiation.

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2

Salim, Shesnia. "“Academic success depends upon research and publications!” - PHILIP ZIMBARDO." Journal of Radiation Research and Imaging 2, no. 1 (2023): 9–10. http://dx.doi.org/10.46439/radiation.2.007.

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3

Schwarz, Benjamin, Matthias Sammer, Nicole Matejka, Sarah Rudigkeit, and Judith Reindl. "High-LET targeted microbeam irradiation induces local chromatin reorganization in living cells showing active basal mechanisms at highly complex DNA damage sites." Journal of Radiation Research and Imaging 2, no. 1 (2023): 1–8. http://dx.doi.org/10.46439/radiation.2.006.

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DNA repair eukaryotic cells have additional protective mechanisms that avoid uncontrolled interaction of different parts of the chromatin and damaged regions. Key factors here are the regulation of chromatin density and mobility. The 4D (temporal and spatial) organization of chromatin is controlling this security barrier by regulating the accessibility of genes, flexibility of DNA, and its ability to move inside the nucleus. How this regulation mechanisms are involved in DNA repair upon radiation damage is until now rarely known but an important part to understand the enhanced effectiveness of

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4

Kitov, B. I. "Fluorescence of anisotropic primary X-ray radiation." Аналитика и контроль 26, no. 1 (2022): 6–12. http://dx.doi.org/10.15826/analitika.2022.26.1.002.

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In the X-ray spectral fluorescence analysis, the anisotropy of primary radiation results in an uneven radiation of a sample’s surface, strengthening the role of some sections and weakening the role of others. The goal of the current work was to determine the minimal distance from the window of the X-ray tube with a cone-shaped anode at which the intensity of the sample’s radiation becomes homogeneous. The research method was the computer modeling of the X-ray fluorescence experiment. The working model was built on the basis of two equations for the densities of the fluxes of braking and charac

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5

Philipona, Rolf, Andreas Kräuchi, Rigel Kivi, et al. "Balloon-borne radiation measurements demonstrate radiative forcing by water vapor and clouds." Meteorologische Zeitschrift 29, no. 6 (2020): 501–9. http://dx.doi.org/10.1127/metz/2020/1044.

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6

NITTA, HIDEO. "DIFFRACTED CHANNELING RADIATION AND OTHER COMPOUND RADIATION PROCESSES." International Journal of Modern Physics A 25, supp01 (2010): 128–35. http://dx.doi.org/10.1142/s0217751x10049979.

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Radiations from a crystal irradiated with relativistic charged particles are reviewed with the emphasis on their fundamental processes. As their "compound processes" diffraction of both channeling radiation and coherent bremsstrahlung are considered. Coherent polarization radiation from neutral particles with magnetic moment is discussed within the framework of classical electrodynamics.

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7

Genner, Martin J., Benjamin P. Ngatunga, Semvua Mzighani, Alan Smith, and George F. Turner. "Geographical ancestry of Lake Malawi's cichlid fish diversity." Biology Letters 11, no. 6 (2015): 20150232. http://dx.doi.org/10.1098/rsbl.2015.0232.

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The Lake Malawi haplochromine cichlid flock is one of the largest vertebrate adaptive radiations. The geographical source of the radiation has been assumed to be rivers to the south and east of Lake Malawi, where extant representatives of the flock are now present. Here, we provide mitochondrial DNA evidence suggesting the sister taxon to the Lake Malawi radiation is within the Great Ruaha river in Tanzania, north of Lake Malawi. Estimates of the time of divergence between the Lake Malawi flock and this riverine sister taxon range from 2.13 to 6.76 Ma, prior to origins of the current radiation

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Blázquez, Miguel, Rüdiger Ortiz-Álvarez, Francisco Gasulla, Israel Pérez-Vargas, and Sergio Pérez-Ortega. "Bacterial communities associated with an island radiation of lichen-forming fungi." PLOS ONE 19, no. 3 (2024): e0298599. http://dx.doi.org/10.1371/journal.pone.0298599.

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Evolutionary radiations are one of the most striking processes biologists have studied in islands. A radiation is often sparked by the appearance of ecological opportunity, which can originate in processes like trophic niche segregation or the evolution of key innovations. Another recently proposed mechanism is facilitation mediated by the bacterial communities associated with the radiating species. Here we explore the role of the bacterial communities in a radiation of lichen-forming fungi endemic to Macaronesia. Bacterial diversity was quantified by high throughput sequencing of the V1–V2 hy

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9

M., J. Hossen, F. Kabir M., Amin A., A. Khatun M., and A. Sattar M. "Background Radiation Observation and Measurement: A Case Study Around HSTU Campus, Dinajpur, By Using a Geiger-Muller (GM) Counter." International Journal of Science and Business 15, no. 1 (2022): 79–86. https://doi.org/10.5281/zenodo.6973189.

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Radiation is the name for energy that travels as electromagnetic waves or particles. According to energy or ionizing power, ionizing radiations might be harmful to people's health. We were interested in radiations with high energy to ionize materials for our work. Overexposure to ionizing radiations like Alpha (α), Beta (β), and Gamma (&upsih;) radiations can result in a variety of malignancies. Different types of radiation sources could be present. The main contributors of radionuclides are <sup>40</sup>K, <sup>226</sup>Ra, <sup>238</sup>U, and <sup>232</sup>Th. Man-made source

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10

Magee, John L. "Nonhomogeneous processes in radiation research: Radical diffusion models." Canadian Journal of Physics 68, no. 9 (1990): 853–57. http://dx.doi.org/10.1139/p90-123.

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Radiation research has come to mean investigations of the nature of penetrating radiations and their effects on the materials they traverse. The radiations themselves are fast charged particles (including atomic nuclei and electrons) and short wave length electromagnetic photons (X and γ rays). These radiations have the common property that they deposit their energy nonhomogeneously (in tracks) as they are stopped in matter. Chemically reactive species (excited molecules, ions, radicals, etc.) are created in the tracks. Irradiated systems are the earliest examples of systems recognized to be n

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11

Zhao, De Chun, and Long Sheng Zhang. "Biological Effects of Electromagnetic Radiation and Protection." Applied Mechanics and Materials 513-517 (February 2014): 3313–16. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.3313.

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With the development of science and technology, electronic equipments are widely applied in society. Electronic equipments make life more convenient and efficient. However, a variety of harmful electromagnetic radiation is generated when the electronic equipment is working. The electromagnetic radiation not only affects the normal operation of other electronic device but also pollutes the environment survival for human. Furthermore, electromagnetic radiation is harm to human. Therefore, it is important to take measures to prevent various electromagnetic radiations. Firstly this paper introduce

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12

Hasan, Bismah, and Kamran Raza. "Dual Band Slotted Printed Circular Patch Antenna With Superstrate and EBG Structure for 5G Applications." January 2019 38, no. 1 (2019): 227–38. http://dx.doi.org/10.22581/muet1982.1901.19.

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Slotted circular printed layered patch antenna is designed, simulated and fabricated for 5G (Fifth Generation) wireless communication applications. The antenna consists of slots in the main radiating circular patch element for miniaturizing the size of the radiating element and providing dual band radiation characteristics. The feed line is separated on bottom substrate layer with EBG (Electromagnetic Band-Gap) embedded for enhancing the gain characteristics of the antenna. Superstrate layer is also used for improving the gain of the antenna where the distance from the radiating antenna elemen

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13

Cisterna-Osorio, Pedro, Sergio Quijada-Vera, Daniela Ruiz-Duran, Rodrigo Peirano-Cuevas, and Pamela Ortiz-Briones. "First Results: Innovative Solar Disinfection Technology for Treated Wastewater that Integrates Materiality, Geometry, and Reflective Panels." International Journal of Environmental Research and Public Health 17, no. 18 (2020): 6523. http://dx.doi.org/10.3390/ijerph17186523.

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Climate change is having drastic consequences in Chile. The lack of water in various regions is causing environmental impacts on ecosystems, including the decrease in the productive activities of rural economies and the deterioration in the quality of life of the inhabitants that occupy the affected physical spaces. In this paper, we propose a sustainable, low-cost treatment of wastewater and its reuse as an adaptation and mitigation policy, patented in 2019, that consists of a wastewater disinfection system based on solar energy. This system can work in both continuous and discontinuous modes

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14

Shruti, Lohiya, and Laxmi Kalyani Vijay. "An Empirical Study on Electromagnetic Radiation in a Residential Complex in Ajmer City with Special Reference to the Household Electrical and Electronics Appliances." Journal of Management Engineering and Information Technology (JMEIT) 4, ` (2017): 7. https://doi.org/10.5281/zenodo.344945.

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Radiation, radiation everywhere but just a few radiations is of expend. Journey of our life from nativity to our mortality, each and every second of our life we are exaggerated by radiations whether we are in our residence or outside.Radiation is energy that is travelling through space in the form of waves or particles. The radiation energy is spreading into atmosphere and getting wasted and it is increasing atmospheric temperature too.Though there are radiations which are useful for an individual like radiations used for cancer treatment; but enhanced amount of anything is always destructive.

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15

STANTON, ROBERT. "Radiation Protection of Workers (Ionising Radiations)." Health Physics 55, no. 6 (1988): 1017. http://dx.doi.org/10.1097/00004032-198812000-00026.

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16

Ifeoma, B. Asianuba. "Side Lobe Reduction in Linear Array Antenna using Numerical Computation Approach." European Journal of Advances in Engineering and Technology 6, no. 4 (2019): 29–35. https://doi.org/10.5281/zenodo.10687581.

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<strong>ABSTRACT</strong> Large amount of energy is saved when a transmitting antenna propagates its field radiations painstakingly in the required direction of propagation. For this reason, reduction in side lobe radiation is essential to avoid degrading the total power and efficiency of the radiating structure. In this paper, a numerical approach is adopted other than the well known stochastic approach to reduce side lobe radiations in linear array antennas. This choice is as a result of the short design cycle of the numerical solution for antenna field problems, full exploration of design s

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Li, Shuqin, Qingguo Chang, Xiang Chen, and Sicheng Liao. "Research on Short Term Prediction Algorithm for Freeway Pavement Ice." Academic Journal of Science and Technology 5, no. 3 (2023): 90–92. http://dx.doi.org/10.54097/ajst.v5i3.7783.

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This article focuses on the short-term prediction algorithm for ice condensation on highway pavement. Solar radiation, ground long wave radiation, and atmospheric inverse radiation are the main factors affecting road surface temperature changes. According to the principle of radiation heat transfer, there is a radiation balance relationship among these three factors. Therefore, based on the balance relationship between these three radiations and the physical heat formula, this article designs a short-term prediction algorithm for road icing. Based on the basic theory of radiation heat transfer

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18

Stroud, James T., and Jonathan B. Losos. "Bridging the Process-Pattern Divide to Understand the Origins and Early Stages of Adaptive Radiation: A Review of Approaches With Insights From Studies of Anolis Lizards." Journal of Heredity 111, no. 1 (2019): 33–42. http://dx.doi.org/10.1093/jhered/esz055.

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Abstract Understanding the origins and early stages of diversification is one of the most elusive tasks in adaptive radiation research. Classical approaches, which aim to infer past processes from present-day patterns of biological diversity, are fraught with difficulties and assumptions. An alternative approach has been to study young clades of relatively few species, which may represent the putative early stages of adaptive radiation. However, it is difficult to predict whether those groups will ever reach the ecological and morphological disparity observed in the sorts of clades usually ref

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19

Gillespie, Rosemary G., Gordon M. Bennett, Luc De Meester, et al. "Comparing Adaptive Radiations Across Space, Time, and Taxa." Journal of Heredity 111, no. 1 (2020): 1–20. http://dx.doi.org/10.1093/jhered/esz064.

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Abstract Adaptive radiation plays a fundamental role in our understanding of the evolutionary process. However, the concept has provoked strong and differing opinions concerning its definition and nature among researchers studying a wide diversity of systems. Here, we take a broad view of what constitutes an adaptive radiation, and seek to find commonalities among disparate examples, ranging from plants to invertebrate and vertebrate animals, and remote islands to lakes and continents, to better understand processes shared across adaptive radiations. We surveyed many groups to evaluate factors

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20

Madee, Yosef G.Ali, Rezvan Rezaeizadeh, and Hançerliogulları. "Evaluation the Knowledge and Radiation Protection of Radiation Workers at Ibensina Hospital." Inspiring Technologies and Innovations 1, no. 2 (2022): 39–42. https://doi.org/10.5281/zenodo.7478612.

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To evaluate the knowledge and awareness of radiation worker’s towards radiation protection. Each day people are effecting by Ionizing radiations. The ionizing radiation is produced several types of hazards. Thus, technicians are working at hospitals should be have good knowledge about radiation protection. In this study, the questionnaire based cross-sectional study performed at Ibensina hospitals-Sirte city, Libya between July -30August 2021 years out of 38 radiation workers. All data collected    from some questionnaire and analyzed by microsoft Excel softwere surveyed.

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21

Scott, Bobby R., and Jennifer Di Palma. "Sparsely Ionizing Diagnostic and Natural Background Radiations are Likely Preventing Cancer and other Genomic-Instability-Associated Diseases." Dose-Response 5, no. 3 (2007): dose—response.0. http://dx.doi.org/10.2203/dose-response.06-002.scott.

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Routine diagnostic X-rays (e.g., chest X-rays, mammograms, computed tomography scans) and routine diagnostic nuclear medicine procedures using sparsely ionizing radiation forms (e.g., beta and gamma radiations) stimulate the removal of precancerous neoplastically transformed and other genomically unstable cells from the body (medical radiation hormesis). The indicated radiation hormesis arises because radiation doses above an individual-specific stochastic threshold activate a system of cooperative protective processes that include high-fidelity DNA repair/apoptosis (presumed p53 related), an

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22

Bratman, Vladimir, Yuri Lurie, Yuliya Oparina, and Andrey Savilov. "Capabilities of Terahertz Cyclotron and Undulator Radiation from Short Ultrarelativistic Electron Bunches." Instruments 3, no. 4 (2019): 55. http://dx.doi.org/10.3390/instruments3040055.

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Mechanisms of coherent spontaneous cyclotron and undulator radiations of short dense bunches, in which electrons move along the same stationary helical trajectories, but have different dynamic properties, have been compared in detail. The results are based on the simplest 1D model in the form of a plane consisting of uniformly distributed synchronously moving and in-phase emitting particles, as well as numerical 3D codes developed to study the dynamics of bunches in waveguides taking into account the effects of the radiation and spatial charge fields. For cyclotron radiation under group synchr

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23

Ruzmaikin, Alexander, Hartmut H. Aumann, and Jonathan H. Jiang. "Interhemispheric Variability of Earth’s Radiation." Journal of the Atmospheric Sciences 72, no. 12 (2015): 4615–28. http://dx.doi.org/10.1175/jas-d-15-0106.1.

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Abstract The variability of interhemispheric symmetry of Earth’s energy serves as an independent indicator of climate change. The analysis of updated data obtained from satellite measurements at the top of the atmosphere (TOA) shows that in accord with Earth’s orbital requirements the annually averaged incident solar radiation is the same in the Northern and Southern Hemispheres, the annual mean of the reflected shortwave radiation is almost north–south symmetric, and the annual mean of the outgoing longwave radiation is larger in the Northern Hemisphere by 1.4 W m−2. These mean radiations sys

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24

Dhirajkumar Gokulchand Agrawal. "Proximity Effects of Electromagnetic Field Radiation from Cellular Wireless System on Living Things and Their Mitigation Techniques." Journal of Electrical Systems 20, no. 9s (2024): 2663–72. http://dx.doi.org/10.52783/jes.4954.

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Research on electromagnetic field radiation exposure from cellular wireless systems is expected to become more important, allowing researchers to provide solutions for the effects of this radiation on human living beings. During the research, experiment animals were unprotected to RF radiations for 8 hours every day for 30 days. The exposure duration involved the placement of test animals in Plexiglass boxes. An RF transmitter was placed on the cage's roof from within. The transmitter emitted EMF radiations that were noted in rats. An elevated plus maze and open field test was utilized to dete

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Ezhilmaran, M., J. Vishnupriyan, M. Ettappan, and K. Kirubasankar. "Analysis of Electromagnetic Wave with Right Handed Meta-Material." Journal of Computational and Theoretical Nanoscience 17, no. 11 (2020): 4930–33. http://dx.doi.org/10.1166/jctn.2020.9259.

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In today’s modern world wireless and mobile devices have become almost indispensable. As a result human beings are constantly exposed to electromagnetic radiation emanating from these devices which can be harmful for the health. The effect of electromagnetic radiation is higher when we are close to the radiating device, so it is important that a mechanism is developed that will reduce the effect of these radiations and analyze the electromagnetic waves. Finite Difference Time Domain (FDTD) is the effective method to simulate and analyze for positive refractive index on Metamaterial. The simula

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Liu, Dalong, Xiaowei Jia, and Wenqin Wang. "Comparative analysis of simulation of urban radiation field." MATEC Web of Conferences 282 (2019): 02026. http://dx.doi.org/10.1051/matecconf/201928202026.

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In order to compare the differences between various outdoor environmental simulation software in the urban radiation field, ENVI-met, RayMan and SOLWEIG were selected as the research objects. The multiple types of urban radiation intensities that can be obtained by each software are compared, and the calculation method of types of these radiations was analyzed. Effects of underlying surface on the radiation field were simulated separately. The differences in radiation field performance simulations of three softwares were compared from several aspects such as short wave, direct radiation and re

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27

Shahid, Saman, Asma Majeed, Rana Aatif Siddique, Khalid Masood, and Shahid Ali. "Lifetime Risk of Radiation Induced Severe Hereditary Stochastic (SHS) Effects in Medical Radiation Personnel." Pakistan Journal of Medical and Health Sciences 15, no. 5 (2021): 1105–7. http://dx.doi.org/10.53350/pjmhs211551105.

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Background: Hereditary risk assessments in medical radiation workers must be accentuated as a precaution against genetic diseases. Ionizing radiations can induce hereditary or genetic radiation effects. Aim: To evaluate the lifetime risk of severe hereditary stochastic (SHS) effects in INMOL’s medical radiation personnel. Methods: The determination of the ‘whole-body’ effective doses was performed by ‘dose assessment algorithm’. We adopted the procedure described by ICRP for the assessment of lifetime severe hereditary annual risks by using ‘nominal probability coefficient’. Results: The AAEDs

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Naryo, Naryo, Diky Nur Alamsyah, Anindya Ermita Novayti, and Haztian Fawzia Ashari. "PENGARUH PELATIHAN PROTEKSI RADIASI TERHADAP BUDAYA KESELAMATAN RADIASI." Prosiding Seminar Si-INTAN 4, no. 1 (2024): 67–73. http://dx.doi.org/10.53862/ssi.v4.092024.011.

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Radiology examination in Indonesia is bound by radiation protection policy. Radiographers, as radiation workers, must ensure radiation safety during radiology examinations. A strong safety culture needs to be implemented, considering that radiology installations use radiation that can adversely affect health. Radiation protection training is one of the most critical factors contributing to forming a radiation safety culture. This study aims to analyze the effect of radiation protection training on radiation officers on improving radiation safety culture, identifying radiation safety culture be

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Gavahi, Mehrad. "The Coherent and Thermal Photons Radiation in the Enzyme." Revista de la Universidad del Zulia 11, no. 30 (2020): 13–25. http://dx.doi.org/10.46925//rdluz.30.02.

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This paper presents the theoretical states of radiation field in the mechanism of enzyme, for state of thermal and coherent radiation by concept of the quantum mechanics. For illustrating the energy and distribution of photon, we used simple concepts of the radiation field in the enzyme. We try to present the thermal radiation and coherent radiation happened in the biological microscopic system especially in the enzyme, and show that, these radiations could break the hydrogen bond pairs in the enzyme (substrate) at high temperature (above 323K) and show its effects on the relative activity of

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Saharian, A. A., L. Sh Grigoryan, H. F. Khachatryan, and V. V. Parazian. "Radiation processes on acoustic superlattices." Journal of Physics: Conference Series 2657, no. 1 (2023): 012017. http://dx.doi.org/10.1088/1742-6596/2657/1/012017.

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Abstract We describe several radiation processes in media excited by volume and surface acoustic waves. They include the Cherenkov and transition radiations on acoustic superlattices, transition radiation on an interface with a dynamical periodic structure, the Smith-Purcell radiation on surface waves, bremsstrahlung of high-energy electrons and the creation of electron-positron pairs by high energy photons in crystals in the presence of hypersonic waves. The conditions on the parameters of acoustic fields are specified under which their influence is essential. All these considerations show th

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Gomez-Crespo, G. "Organization of Radiation Medicine." Revista Brasileira de Cancerologia 25, no. 5 (2023): 45–50. http://dx.doi.org/10.32635/2176-9745.rbc.1975v25n5.4340.

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Castigat ridendo mores “Radiation medicine comprises three distinct branches: diagnostic radiology, radiotherapy and nuclear medicine. These three branches have become separate and distinct specialties in medicine but are linked together under the term radiation medicine because they have various features in common. They make use of the diferente properties of ionizing radiations; there are certains hazards which need the same principies of protection and call for the same basic training in the use and hazards of ionizing radiation; they need purpose built accommodation which has some features

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Usov, Vladimir V. "Radiating Regions in Pulsar Magnetospheres: From Theory to Observations and Back." International Astronomical Union Colloquium 177 (2000): 417–20. http://dx.doi.org/10.1017/s0252921100060176.

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AbstractWe discuss plausible locations of radiating regions in the magnetospheres of pulsars and argue that the mechanisms of pulsar radiation at different frequencies are closely connected with the locations of the radiating regions, especially in the radio range. If the region that is responsible for the bulk of the non-thermal radiation at some frequency is localized in the pulsar magnetosphere then the nature of this radiation will be either determined or, at least, restricted significantly.

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Nakajima, Tetsuo, Yasuharu Ninomiya, and Mitsuru Nenoi. "Radiation-Induced Reactions in The Liver — Modulation of Radiation Effects by Lifestyle-Related Factors —." International Journal of Molecular Sciences 19, no. 12 (2018): 3855. http://dx.doi.org/10.3390/ijms19123855.

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Radiation has a wide variety of effects on the liver. Fibrosis is a concern in medical fields as one of the acute effects of high-dose irradiation, such as with cancer radiotherapies. Cancer is also an important concern following exposure to radiation. The liver has an active metabolism and reacts to radiations. In addition, effects are modulated by many environmental factors, such as high-calorie foods or alcohol beverages. Adaptations to other environmental conditions could also influence the effects of radiation. Reactions to radiation may not be optimally regulated under conditions modulat

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KUMAR, PRASANN, DEBJANI CHOUDHURY, and MOIRANGTHEM INDIRA DEVI AND JANMEJAY SAHOO. "Impact of Radiation on Parasitoid Ecology: Unveiling Complex Interactions." BIOPESTICIDES INTERNATIONAL 20, no. 02 (2024): 165. https://doi.org/10.59467/bi.2024.20.165.

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Ionizing radiation, a formidable force with implications for ecosystems, has garnered increasing attention due to its potential to disrupt delicate ecological relationships. Parasitoids, the natural enemies of insect pests, are well known for their role in pest regulation and provide an insightful lens through which to explore the multifaceted impact of radiation on ecology. This review delves into the intricate interactions between radiation exposure and parasitoid behavior, physiology, reproduction, and population dynamics. Radiation-induced changes in parasitoid behavior encompass altered h

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Bagrov, Vladislav, Anna Kasatkina, and Alexey Pecheritsyn. "Effective Angle of Synchrotron Radiation." Symmetry 12, no. 7 (2020): 1095. http://dx.doi.org/10.3390/sym12071095.

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An exact analytical expression for the effective angle is determined for an arbitrary energy value of a radiating particle. An effective angle of instantaneous power is defined for synchrotron radiation in the framework of classical electrodynamics. This definition explicitly contains the most symmetric distribution of half the total of the instantaneous power of synchrotron radiation. Two exact analytical expressions for the effective angle are considered for the arbitrary energy values of a radiating particle, and the second expression brings to light the exact asymptotics of the effective a

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Guo, L., H. W. Zhang, and H. C. Wu. "High-frequency radio-wave emission by coherent transition radiation of runaway electrons produced by lightning stepped leaders." Physics of Plasmas 29, no. 9 (2022): 093102. http://dx.doi.org/10.1063/5.0102132.

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Lightning can produce multiband radio waves and high-energy radiations. Some of them are associated with the formation of lightning leaders. However, their generation mechanisms are not fully understood yet. Based on the understanding of thermal runaway electrons generated at the leader tip, we propose transition radiation of these runaway electrons as an alternative mechanism for producing very-high-frequency radio signals. Transition radiations are induced when runaway electrons cross the interfaces between lightning coronas and the air. By the use of estimated parameters of electron beams e

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Kolesnichenko, Aleksandr Vladimirovich. "Simple waves and small perturbations in radiative gas dynamics." Keldysh Institute Preprints, no. 48 (2023): 1–34. http://dx.doi.org/10.20948/prepr-2023-48.

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The paper analyses one-dimensional simple waves and small-amplitude disturbances in radiating and scattering grey gas. The governing equation of radiation acoustics describing the dynamics of simple waves is derived. Radiation-thermal dissipation conditions and radiation resistance force are introduced into this equation to describe the propagation and attenuation of various radiation perturbation waves. To study non-equilibrium wave phenomena in a radiating medium, the phenomenological Whitham method is used. This method is an effective way to analyse fundamental modes when more than one velo

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Emenike Orji, Chikwendu, Efe Omita, and Kelechukwu B. Okeoma. "Evaluation of Complete Blood Counts Parameters of Occupational Radiation and Non-Radiation Professionals from Three Teaching Hospitals in South-South Nigeria." International Journal of Health Sciences and Research 12, no. 7 (2022): 149–55. http://dx.doi.org/10.52403/ijhsr.20220722.

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Background: The exposure of radiation workers to ionizing radiations, especially in medical field has increased due to the use of advance technological equipment in the diagnostic radiology and radiotherapy departments. This study is aimed at evaluating the effects of ionizing radiation on CBC parameters of medical radiation workers in South-South, Nigeria. Materials and Methods: This comparative cross-sectional study was conducted in three teaching hospitals to include 39 radiation workers and 39 non-radiation workers with same year of working experience of one year to 10 years. Results: The

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Dempsey, Shane E., Naomi Findlay, and Lesley MacDonald-Wicks. "Increasing nutritional support for patients undergoing radiation therapy: the radiation therapist perspective." Journal of Radiotherapy in Practice 10, no. 3 (2010): 181–89. http://dx.doi.org/10.1017/s1460396910000257.

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AbstractPurpose: The aim of this study was to determine radiation therapists’ knowledge on the nutritional management of side effects for patients receiving treatment to the gastrointestinal tract and genitourinary system and to determine the willingness of radiation therapists’ to participate in nutritional training.Method: A cross-sectional survey at a Radiation Oncology Treatment Centre was performed coupled with a semi-structured interview to explore radiation therapists’ knowledge and experiences related to patient nutritional care.Results: Eighty-one percent of participants agreed that t

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Rammal, R., M. Lalande, E. Martinod, et al. "Far-Field Reconstruction from Transient Near-Field Measurement Using Cylindrical Modal Development." International Journal of Antennas and Propagation 2009 (2009): 1–7. http://dx.doi.org/10.1155/2009/798473.

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The aim of this work is to get far field radiation patterns for any radiating source from transient acquisition, in a large frequency range. An outdoor transient Ultra-Wideband near-field measurement base will be installed, a single time pulse radiated by the source will cover the desired spectrum, and the accurate determination of far field radiations will be accomplished by means of cylindrical waves' modal development. This method uses simplified test equipments, easy to be installed, and it reduces measurement costs.

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Obrador, Elena, Rosario Salvador, Juan I. Villaescusa, José M. Soriano, José M. Estrela, and Alegría Montoro. "Radioprotection and Radiomitigation: From the Bench to Clinical Practice." Biomedicines 8, no. 11 (2020): 461. http://dx.doi.org/10.3390/biomedicines8110461.

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The development of protective agents against harmful radiations has been a subject of investigation for decades. However, effective (ideal) radioprotectors and radiomitigators remain an unsolved problem. Because ionizing radiation-induced cellular damage is primarily attributed to free radicals, radical scavengers are promising as potential radioprotectors. Early development of such agents focused on thiol synthetic compounds, e.g., amifostine (2-(3-aminopropylamino) ethylsulfanylphosphonic acid), approved as a radioprotector by the Food and Drug Administration (FDA, USA) but for limited clini

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42

Yang, Ya-Lung, and Ding-Bing Lin. "A Compact Planar Wi-Fi Antenna with Optimized Radiation Patterns for Small UAV Applications." Applied Sciences 13, no. 13 (2023): 7470. http://dx.doi.org/10.3390/app13137470.

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This paper proposes a compact planar Wi-Fi antenna with optimized radiation patterns for small uncrewed aerial vehicle (UAV) applications in both urban and open areas. It is suitable for mounting on the outermost side of the non-metallic wing of small UAVs. It has small dimensions of 16.5 mm (L) by 30.3 mm (W) by 1.6 mm (h), and the measured results of its prototype are in agreement with simulated data. Its impedance bandwidths over the two frequency ranges are 2.11 to 2.58 GHz and 5.06 to 7.5 GHz (S11≤-10 dB). At 5.8 GHz, it has stronger radiation below the small UAV to reduce interference fr

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Reddy, Ambarapu Mastan, Donthula Abhishek, Akyam Lakshman Rao, and Gudla Venugopal. "Frontal Radiation Induced Meningioma." International Journal of Neurology and Neurosurgery 10, no. 2 (2018): 124–28. http://dx.doi.org/10.21088/ijnns.0975.0223.10218.10.

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Biagini, R., I. Memmi, and F. Olmi. "Radiation damage in zircons." Neues Jahrbuch für Mineralogie - Monatshefte 1997, no. 6 (1997): 257–70. http://dx.doi.org/10.1127/njmm/1997/1997/257.

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Meng, Chunlei, and Huoqing Li. "Solar Radiation Partitioning and Surface Albedo Parameterization in the Hinterland of Taklimakan Desert." Advances in Meteorology 2019 (December 11, 2019): 1–8. http://dx.doi.org/10.1155/2019/9098576.

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Surface albedo is one of the key parameters of land surface radiation and energy balance. As surface albedoes for visible and near-infrared solar radiation are quite different, solar radiation partitioning is important to parameterize the total surface albedo and upward solar radiation. In this paper, a surface albedo parameterization scheme was introduced and a solar radiation partitioning method was developed to improve the simulation of the upward solar radiation. The simulation results were validated in a hinterland site of the Taklimakan Desert. The surface albedo is not only associated w

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Damanik, Martua, Josepa ND Simanjuntak, and Elvita Rahmi Daulay. "Studi Paparan Radiasi pada Pekerja Radiasi Cathlab dengan Menggunakan My Dose Mini sebagai Upaya Keselamatan Radiasi di RSUP Adam Malik Medan." Jurnal Pengawasan Tenaga Nuklir 1, no. 1 (2021): 41–46. http://dx.doi.org/10.53862/jupeten.v1i1.009.

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Cathlab radiation workers, when performing interventional procedures, are at high risk of the effects of radiation exposure. The risk of radiation exposure is deterministic and stochastic biological effects. Therefore, radiation exposure studies of radiation workers at the cath lab were conducted to determine the value of radiation exposure received. This radiation exposure study was conducted by measuring and recording radiation exposure doses received by radiation workers. Measurements are made when the radiation officer performs the intervention procedure. The research was carried out for o

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Motl, Alois. "Effect of the ionizing radiation on the catalytic activity of the BASF K-3-10 catalyst in the low-temperature conversion of carbon monoxide by water vapour. Stability of the radiation catalytic effects." Collection of Czechoslovak Chemical Communications 51, no. 8 (1986): 1571–78. http://dx.doi.org/10.1135/cccc19861571.

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The radiation catalytic properties of the BASF K-3-10 catalyst were studied, namely the dependence of these effects on the time interval between the catalyst irradiation and the reaction itself and also on the length of the catalyst use. The catalytic effects decrease exponentially with the interval between the irradiation and the reaction if the catalyst is kept in the presence of air. The stability of effects induced by various types of radiations increases in the sequence beta radiation - gamma radiation - fast neutrons. The radiation catalytic effect stability in the reaction increases in

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RICHA, RICHA. "Adverse Effect of Electromagnetic Radiation on Human Health: A Review." WORLD JOURNAL OF APPLIED SCIENCE AND RESEARCH 10-11, no. 01-02 (2021): 55. https://doi.org/10.59467/wjasr.2021.10-11.55.

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Abstract (sommario):

Electromagnetic radiation (EMR) is emitted by various devices and technologies. A review of the impact of EMR on human health has been presented here. In this paper, the author discussed different types of EMR and how these radiations affect human health. What health risks are associated with the use of a cell phone, microwave radio, microwave oven, X-rays, and gamma rays? The effect of EMR can be reduced by improved safety guidelines, public education and awareness, and reducing the exposure limit of those devices that produce EMR. . KEYWORDS :Electromagnetic Radiation, Ionizing Radiation, No

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RICHA, RICHA. "Adverse Effect of Electromagnetic Radiation on Human Health: A Review." WORLD JOURNAL OF APPLIED SCIENCE AND RESEARCH 10-11, no. 01-02 (2021): 55. https://doi.org/10.59467/wjasr.2020-21.10-11.55.

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Abstract (sommario):

Electromagnetic radiation (EMR) is emitted by various devices and technologies. A review of the impact of EMR on human health has been presented here. In this paper, the author discussed different types of EMR and how these radiations affect human health. What health risks are associated with the use of a cell phone, microwave radio, microwave oven, X-rays, and gamma rays? The effect of EMR can be reduced by improved safety guidelines, public education and awareness, and reducing the exposure limit of those devices that produce EMR. . KEYWORDS :Electromagnetic Radiation, Ionizing Radiation, No

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50

Zhang, Zi Qiang, G. Y. Yu, Shao Bo Chen, Zhi Dan Zheng, R. D. Li, and Y. Li. "Discussion on Electromagnetic Radiation Protection Standard of Light Industrial Equipments." Key Engineering Materials 455 (December 2010): 444–48. http://dx.doi.org/10.4028/www.scientific.net/kem.455.444.

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Abstract (sommario):

The popular international and Chinese electromagnetic radiation protection standards are introduced, including the ICNIRP guidelines constituted by the International Commission on Non-Ionizing Radiation Protection, the EN62233 standards established by the European Committee for Electrotechnical Standardization and the GB 8702-88 regulations constituted by Ministry of Environmental Protection of the People’s Republic of China, etc. The situation of the light industrial equipments electromagnetic radiation has been tested and analyzed: the power of the induction heater is often up to thousands k

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