electromagnetic radiation Articles
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Surface polaritons in 2D macroporous silicon structures
Effects of increase in absorption of electromagnetic radiation, enhancement of photoconductivity in 2D photonic macroporous silicon were investigated. Dependence of photoconductivity on a corner of falling of electromagnetic radiation was founded out. Primary absorption of p-component of electromagnetic radiation, prevalence of absorption over reflection of light, angular dependencies of ...
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On Radiation Efficiency and Radiating Capability of Impulse Antennas
Abstract Electromagnetic radiation efficiency and radiating capability of impulse antenna are discussed at this paper. A term of impulse antenna is referred to an electromagnetic pulse radiation system with short pulse response. Relation between such antenna characteristics as storage factor, efficiency and radiating capability is considered here. Improvement methods of impulse antemia efficiency ...
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A meta-level true random number generator
True random number generators (TRNGs) are extensively used in cryptography, simulations and statistics. In this work, we introduce, extend and analyse the concept of the randomised bit cell (RBC), introducing a second meta-level of randomisation, being able to simultaneously produce random numbers and detect active non-intrusive attacks. The concept is extended by using a corrector. ...
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Electromagnetic Impulse Radiator
Abstract A novel method of short electromagnetic pulse producing by electrical dipole antenna is a topic of this paper. This method assumes the antenna current interruption instead of voltage pulse excitation. In this case antenna-generator matching requirements are considerable simplified and antenna radiation efficiency is increased. In according to proposed method the electromagnetic impulse ...
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Present Status and Future of Advanced Scientific Instrument using X-ray
X-rays have attracted a lot of attention as a form of electromagnetic radiation that enable us to see objects through materials. And they are also a great contributor to clacification of physical phenomena. In the field of analysis, X-rays have drawn attention from their initial stage as a method of non-destructive simultaneous anaysis. Scientific measurement using X-rays is supported by three ...
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An experimental investigation and optimisation of flat plate heat sink
This study is focused on multiple response optimisation of a flat plate heat sink using grey relational analysis and Taguchi design of experiments. The responses considered are electromagnetic emitted radiation and thermal resistance of the heat sink. The emitted radiation and thermal resistance of the heat sink were obtained using Ansoft HFSS and Flotherm CFD simulation, respectively. The ...
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Why is cell phone use banned on airline flights?
It’s commonly believed that using cell phones and other types of electronic devices on an airline flight would interfere with the navigational system. Theoretically, a wireless device like a cell phone could interfere with an airliner’s communication system; the truth is that these systems have been shielded from electromagnetic (EMF) interferences since the 1960’s. The real ...
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Post–normal science and ecological economics: strategies for precautionary approaches and sustainable development
Ecological economics provides a research field for critical reflection on relationships between the economy and the life–sustaining ecosystems. With focus on strong uncertainty, irreversibility, strong sustainability, precautionary approaches and ethical complexity, ecological economics differs from the approach of environmental economics and shares several of the characteristics of ...
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Drift Step Recovery Devices Utilization for Electromagnetic Pulse Radiation
Abstract—Utilization of drift step recovery devices for high power electromagnetic short pulse radiation is discussed here. Possibility of powerful impulse radiation is connected with decision of two problems: how to reach stable extremely powerful impulse of nanosecond and subnanosecond duration with repetition rate of dozens and hundreds of kHz; and how to bring to antenna and radiate ...
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Car Seat Embossing HF Welder
Equipment Description of Car Seat Embossing Hf Welder Car Seat Embossing Hf Welder is a kind of seat cover welding machine. The two sides of the slide can be set up with three sections of adjustable time, adjustable power, and adjustable pressure. Electromagnetic radiation conforms to GB/T18555-2001 (providing third party normal institution inspection certificate). There are up to 30 kinds ...
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Lessons to be learnt from epidemiological studies in radiation-exposed people
The research into the cancer risk posed by radioactive pollution played a pilot role in changing our awareness of long-term health damage from invisible pollution of the environment. Most paradigms, concepts and methods of environmental research used today have been developed in the course of those large scale epidemiological studies such as questions relating to latency, type of cancer, genetic ...
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Time-Domain Physical-Optics Simulation Technique for Electromagnetic Imaging by Subsurface Radar
Abstract - This paper presents a 2-D scalar numerical time-domain (TD) model based on physical optics (PO) for simulation of electromagnetic phenomena. This TD-PO model should be applied for detection and location of objects hidden in opaque media by subsurface TD radar system. The proposed approach allows considering of basic physical principles, governing electromagnetic radiation and ...
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Water purification
Water purification is a process of removing undesirable chemicals, materials, and biological contaminants from raw water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (Drinking water) but water purification may also be designed for a variety of other purposes, including meeting the requirements of medical, pharmacology, chemical and ...
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The Ability to Detect From a Distance
Observing this series of photos taken every 30 seconds by OPGAL’s OGI camera (EyeCGas 2.0), shows a significant volatile organic compounds emission (VOCs) event, including methane released into the air. The gas flows through a cold pipe (the black flare structure), and its temperature evens out with the ambient air temperature upon release to the atmosphere. However, since all VOCs emit an ...
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International Day of Light
The International Day of Light is celebrated annually on the 16th of May, the anniversary of the first successful use of the laser. The event is a global initiative to highlight the role light plays in all aspects of life, from science to art and education.1 The broad applications of light covers research areas such as medicine to renewable energy and is supported by UNESCO to help achieve their ...
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Glossary of Fluorescence Spectroscopy Terms
Edinburgh Instruments has compiled a glossary of all the key terms related to Fluorescence Spectroscopy. Please browse the glossary bellow to find the definition for the term you are interested in.AbsorbanceMeasure of the amplitude of absorbed energy in a spectrum related to the concentration of an analyte. This term is also referred to as the negative log (base 10) of Transmittance (-log₁₀T = ...
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Everything You Need to Know About UV Water Purification
If you draw water from a well or lake and are concerned about its quality, a UV Water purification system might give you the peace of mind your water is safe to use. Households on municipal water systems are not completely safe either, as water main breaks and broken pipes which can lead to water contamination occur frequently. The ultraviolet water purification process uses ultraviolet light or ...
By AquaBSafe
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What is a Spectrometer?
In the broadest sense a spectrometer is any instrument that is used to measure the variation of a physical characteristic over a given range; i.e. a spectrum. This could be a mass-to-charge ratio spectrum in the case of a mass spectrometer, the variation of nuclear resonant frequencies in an NMR spectrometer or the change in the absorption and emission of light with wavelength in an optical ...
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Environmental-Rating: Deutsche Telekom and Nippon Tel. & Tel. Lead the Way
Deutsche Telekom and NTT Stand Out in the First Environmental Check of the Telecommunications Industry Deutsche Telekom AG and Nippon Telegraph & Telephone (NTT) are both first in an independent Environmental-Rating of 16 telecommunication companies from eleven countries carried out by the Munich-based rating agency ökom. Both companies received the grade C+ and therefore stood out against ...
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Benefits and Applications of Thermal Monitoring Solutions for Security and Surveillance
Advancements in technology have enabled criminals to become less predictable and more invasive. But this phenomenon works both ways, allowing law enforcement and military groups to use technology to their advantage when monitoring illegal activities discreetly. In the field of security and covert operations, thermal detection is becoming increasingly common. With thermal cameras, infrared ...
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