Set-up for testing telecom power unit immunity to electromagnetic fields

2002 ◽  
Author(s):  
B. Modlic ◽  
K. Malaric ◽  
B. Regvart ◽  
J. Bartolic ◽  
B. Kviz
Keyword(s):  
Power Unit ◽  
Electromagnetic Fields ◽  
Set Up

scholarly journals A REVIEW OF THE APPLICATION OF ELECTROMAGNETIC FIELDS ON MICROBES FOR SURFACE SANITARY WIPES.

2020 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Electromagnetic Fields ◽  
Saline Water ◽  
Iron Core ◽  
The Novel ◽  
Antibacterial Effects ◽  
Cylindrical Pipe ◽  
Novel Approach ◽  
Set Up ◽  
Frequency Radiation ◽  
Better Than

The approach in the use of electromagnetic fields (EMFs) has shown antimicrobial effects in different frequencies and intensities. So far, different modalities of EMFs showed antimicrobial and antibacterial effects in different pathogens. However, a novel approach in the use of the EMFs on microbes was carried out using elaborate experimental set up. Apart from the inclusion of ionic pH medium, a short cylindrical pipe was inserted to a short iron core of the same concentric center to form a space in between. Void materials of glass pebbles activated charcoal and saline water (Gel) was filled to the space respectively in accordance with the three experimental set-ups. A coil of wire was inserted around the iron core with the terminals connected to a 12v rechargeable finger battery. These three novel EMFs approaches were conducted under normal prevailing temperature and each of the experimental set up was tested on a table surface infected with pathogens. The novel results showed that the destruction of microbes was 99.9% in faster and better than the prior methods. This results of these experiments will pave way for the optimal industrial application of EMFs to make surface sanitary wipe efficient and effective in Nigeria. Keywords: Electromagnetic Field. Surface Wipes, Microbes, Frequency, Radiation.

MRI set-up and safety

2018 ◽  
pp. 55-62
Author(s):  
Roger Luechinger ◽  
Torsten Sommer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Electromagnetic Fields ◽  
Diagnostic Tool ◽  
Insulin Pump ◽  
Resonance Imaging ◽  
Aneurysm Clip ◽  
Severe Burns ◽  
Magnetic Resonance Imaging Mri ◽  
Set Up

Magnetic resonance imaging (MRI) is a safe diagnostic tool, with several hundred millions of safe diagnostic studies performed to date. However, there have been at least 15 published cases of patient deaths associated with MRI scanning: ten patients with implanted pacemakers, two patients with an insulin pump, one patient with a neurostimulator, one patient with an aneurysm clip, and one child killed by an oxygen tank. Additionally, hundreds of cases of severe burns or injuries due to ferromagnetic projectiles have also been reported. The main sources of all these risks are the electromagnetic fields of the MRI scanner used to create the images.

scholarly journals Influence of selected cycle components parameters on the supercritical CO2 power unit performance

2018 ◽  
Vol 240 ◽  
pp. 05035
Author(s):  
Marcin Wołowicz ◽  
Jarosław Milewski ◽  
Gabriel Ziembicki
Keyword(s):  
Power Unit ◽  
Cycle Performance ◽  
Brayton Cycle ◽  
Split Ratio ◽  
Compressor Inlet ◽  
Set Up ◽  
Cycle Efficiency ◽  
Unit Performance ◽  
Isentropic Efficiency

The paper presents the influence of selected components parameters on the performance of supercritical carbon dioxide power unit. For this analysis mathematical model of supercritical recompression Brayton cycle was created. The analysis took into consideration changes in the net cycle power and efficiency for different compressor inlet temperatures. The results were obtained for a fixed minimum pressure of 7.4 MPa and fixed recompression split ratio. The studies conducted in this paper included also consideration of sensitivity of the cycle efficiency to a change in recuperators heat transfer area. In order to determine how each recuperator influences the cycle performance, an analysis of efficiency dependence on the recuperators area was made. Another parameters that were investigated are to a change in turbine and compressors isentropic efficiency and their influence on the cycle efficiency. In the reference cycle, isentropic efficiencies were set up as 88% for both the main and recompression compressor, and 90% for the turbine. Since isentropic efficiency is a sort of measure of broadly defined quality of a turbine or compressor, including airfoil shape, sealing, etc., it may be a significant cost factor that should be considered during cycle design. Therefore, a sensitivity analysis of cycle efficiency to both compressors and turbine isentropic efficiencies was conducted.

scholarly journals Artificial and natural electromagnetic signals revealed during two years in the Amare cave (Central Italy)

1994 ◽  
Vol 37 (5 Sup.) ◽  
Author(s):  
F. Bella ◽  
R. Bella ◽  
P. F. Biagi ◽  
M. Caputo ◽  
G. Della Monica ◽  
...  
Keyword(s):  
Solid State ◽  
Electromagnetic Fields ◽  
Natural Frequencies ◽  
Central Italy ◽  
Southern Slope ◽  
Qualitative Explanation ◽  
Weather Events ◽  
Electromagnetic Signals ◽  
Set Up ◽  
Electric Signals

n 1990, some instrumentation was set up in the Amare cave (southern slope of the Gran Sasso chain, L'Aquila) in order to pick up electric signals ranging from 0.3 to 300 kHz, magnetic signals from 0.3 to 30 kHz and seismoacoustic signals by means of three geophones with natural frequencies of 0.3 kHz, 25 kHz and 150 kHz. Data are recorded every ten minutes on a solid state memory. The analysis of the data allows us to establish the existence of electromagnetic fields of distant origin connected with broadcastings and with tropical lightning activity and the discontinuous presence of local electric and magnetic signals, coupled with seismoacoustic ones, connected with weather events. A qualitative explanation of these near fields is given.

scholarly journals Measuring the Quality of Water using Ph Sensor and Filling Automatically Into Bottles

2019 ◽  
Vol 8 (4) ◽  
pp. 8865-8869
Keyword(s):  
Water Quality ◽  
Power Unit ◽  
Ph Sensor ◽  
Automatic Monitoring ◽  
Control Device ◽  
Quality Level ◽  
Quality Of Water ◽  
Sensor Module ◽  
Set Up ◽  
The Right

Automatic monitoring and regulation of the water quality allows for the design of the process. This technology uses the engine-based water motor ON / OFF remotely. This indicates the pH sensor and when it is at the water quality level is neutral than water pump is automatically filling the water; the pump is gradually triggered to refill the Bottle. Whenever the Bottle is filled to its maximum potential, the pump is contra-energized gradually. Many circuits were fitted together to ensure the right operation of this design and the diagram involves the power unit, the Arduino (micro-controller unit), the sensor system, the monitor unit and the motor drive device. The power unit is responsible for switching on the whole circuit. Some components are used to set up and include a power unit; a 12v step down transformer, a smoothing capacitor and an IC voltage regulator. The microcontroller (ATmega328) controls absolutely all of the actions carried out in this functionality. The sensor module is for detecting the water quality as well as transferring the Present position of the water to the microcontroller or Arduino. The Control device in the circuit is used to actually fire.

The Effects of Drying Techniques on Clay-Rich Soil Texture

1974 ◽  
Vol 32 ◽  
pp. 466-467
Author(s):  
T. G. Naymik
Keyword(s):  
Critical Point ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Drying Methods ◽  
Air Drying ◽  
Freeze Dried ◽  
Critical Point Drying ◽  
Set Up ◽  
The Relationship ◽  
Quartz Grains

Three techniques were incorporated for drying clay-rich specimens: air-drying, freeze-drying and critical point drying. In air-drying, the specimens were set out for several days to dry or were placed in an oven (80°F) for several hours. The freeze-dried specimens were frozen by immersion in liquid nitrogen or in isopentane at near liquid nitrogen temperature and then were immediately placed in the freeze-dry vacuum chamber. The critical point specimens were molded in agar immediately after sampling. When the agar had set up the dehydration series, water-alcohol-amyl acetate-CO2 was carried out. The objectives were to compare the fabric plasmas (clays and precipitates), fabricskeletons (quartz grains) and the relationship between them for each drying technique. The three drying methods are not only applicable to the study of treated soils, but can be incorporated into all SEM clay soil studies.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

Eels Under Standing Wave Conditions

1982 ◽  
Vol 40 ◽  
pp. 492-495
Author(s):  
O.L. Krivanek ◽  
J. TaftØ
Keyword(s):  
Standing Wave ◽  
Wave Conditions ◽  
Set Up ◽  
A Site ◽  
Complex Crystal

It is well known that a standing electron wavefield can be set up in a crystal such that its intensity peaks at the atomic sites or between the sites or in the case of more complex crystal, at one or another type of a site. The effect is usually referred to as channelling but this term is not entirely appropriate; by analogy with the more established particle channelling, electrons would have to be described as channelling either through the channels or through the channel walls, depending on the diffraction conditions.

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