Low cost IoT for laboratory environment

2016 ◽  
Author(s):  
Rahul Bhadoriya ◽  
Manju K. Chattopadhyay ◽  
Prakash W. Dandekar
Keyword(s):  
Low Cost ◽  
Laboratory Environment

GENERATION OF ELECTROMAGNETIC IMPULSES IN CLAYS DURING THEIR LOADING IN A LABORATORY ENVIRONMENT

2018 ◽  
Vol 108 (2) ◽  
Author(s):  
I. V. Chushkina
Keyword(s):  
Extreme Values ◽  
Irrigation System ◽  
Low Cost ◽  
The Body ◽  
Technical State ◽  
Soil Porosity ◽  
Compression Tests ◽  
Engineering Structures ◽  
Laboratory Environment ◽  
Engineering State

The relevance of the research. Currently, filtration losses from water-bearing systems and controlling constructions are more than 30% which can be predominantly explained by unsatisfactory technical state of hydraulic engineering structures (HESs). Diagnostics of technical state of HESs of agricultural assignment, relating to a failure effect (responsibility) class CC-1 (i.e. minor effects), is performed usually with the help of visual inspection during inter-vegetation period when irrigation system (IS) is waterless. Searching for low-cost techniques to estimate state of soil HESs as well as determination of areas within them requiring for priority repair is a topical theoretical and practical task. Methods of the research. Geophysical method of natural impulse electromagnetic Earth’s field (NIEEF) may become such a technique; however, a problem of electromagnetic impulses (EMI) generation within soil masses is understudied  despite the fact that they are the basic studied environment in the process of diagnostics of soil HESs of irrigation systems using the technique. To make theoretical and experimental substantiation of the NIEEF method to identify zones of filtration as well as zones of raised watering within the body of small soil geotechnical structures, nature of EMI amplitude changes while transferring uniaxial static load to clay samples in laboratory environment has been analyzed. Similar experiments using idealized model validate opportunity to apply the NIEEF technique for estimation of engineering state of HESs. Research results. The experiments were carried out using clay samples with natural moisture and those experienced additional watering. Soil porosity and soil porosity coefficient, being auxiliary characteristics to plot compression curves, were determined before compression tests and after them; standard calculation techniques were applied. The studies involved usual odometer; electromagnetic impulses were recorded with the help of МІЕМП-14/4 device (SIMEIZ series). The clay samples were loaded in accordance with actual pressure from plates and 4.2 m water layer within filled regulating pool (RP) which dimension was 4.789 kN/m2. Analysis of results of the compression tests has verified the following: increased EMI values correspond to maximum stress state of loose soil, and vice versa – their decrease is typical for relaxations of soil samples as well as for their additional watering. Hence, extreme values of EMI oscillation amplitudes are registered at the beginning of the compression tests when the sample experiences the most intensive compression. Peak excitation results insignificant “fall” of EMI number; then it’s slow increase is observed depending upon the decreased intensity of soil compression. Conclusions. The regularity makes it possible to substantiate theoretically the opportunity to apply rapid and low time-consuming as well as low-cost NIEEF method for diagnostics of engineering state of soil HESs. Previously, such experiments, concerning EMI generation, were carried out using crystalline rocks; loose rocks were involved for the first time.

scholarly journals Electrochemical detection of oxacillin resistance with SimpleStat: a low cost integrated potentiostat and sensor platform

2019 ◽  
Vol 11 (14) ◽  
pp. 1958-1965 ◽  
Author(s):  
Adrian Butterworth ◽  
Damion K. Corrigan ◽  
Andrew C. Ward
Keyword(s):  
Electrochemical Detection ◽  
Point Of Care ◽  
Low Cost ◽  
Point Of Care Testing ◽  
Sample Handling ◽  
Laboratory Environment ◽  
Oxacillin Resistance ◽  
Sensor Platform

Testing outside the laboratory environment, such as point of care testing, is a rapidly evolving area with advances in the integration of sample handling, measurement and sensing elements widely reported.

scholarly journals Enhanced cognitive demodulation with artificial intelligence

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hang Ren ◽  
Sang-Hee Shin ◽  
Stepan Lucyszyn
Keyword(s):  
Bit Error Rate ◽  
Figure Of Merit ◽  
Low Cost ◽  
Field Trials ◽  
Step Change ◽  
Bit Rate ◽  
Laboratory Environment ◽  
Maximum Range ◽  
Thermal Emitter ◽  
Ber Performance

AbstractThe low-cost ‘THz Torch’ wireless link technology is still in its infancy. Until very recently, inherent limitations with available hardware has resulted in a modest operational figure of merit performance (Range $$\times$$ × Bit Rate). However, a breakthrough was reported here by the authors, with the introduction of ‘Cognitive Demodulation’. This bypassed the thermal time constant constraints normally associated with both the thermal emitter and sensor; allowing step-change increases in both Range and Bit Rate with direct electronic modulation. This paper concentrates on advancements to the bit error rate (BER) performance. Here, separate techniques are introduced to the demodulation software that, when combined, result in enhanced Cognitive Demodulation. A factor of more than 100 improvement in BER was demonstrated within the laboratory and approximately a 60-fold improvement in a non-laboratory environment; both at the maximum Range and Bit Rate of 2 m and 125 bps, respectively, demonstrated recently. Moreover, demodulation speed is increased by almost a factor of 10,000; allowing for real-time demodulation while easing future computational hardware requirements. In addition to these software advancements, the paper demonstrates important improvements in hardware that has brought the technology out of the laboratory, with field trials being performed within an office corridor.

Development of a Low-Cost and Portable Tomographic Instrument Based on Gamma-Rays Transmission Sensor

1997 ◽  
Vol 34 (1) ◽  
pp. 70-80
Author(s):  
M. Z. Abdullah ◽  
A. A. Tajuddin
Keyword(s):  
Gamma Rays ◽  
Low Cost ◽  
Laboratory Scale ◽  
Medical Applications ◽  
Computerised Tomography ◽  
Laboratory Environment ◽  
Teaching Laboratory

Even though computerised tomography (CT) is a widely used system for medical applications, however, it is still an expensive instrument for use in a common teaching laboratory environment. This paper describes the development of a low cost, laboratory-scale CT instrument based on gamma-rays transmission sensor.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Chromic Acid Etching of Polyethylene

1973 ◽  
Vol 31 ◽  
pp. 72-73
Author(s):  
J. D. Muzzy ◽  
R. D. Hester ◽  
J. L. Hubbard
Keyword(s):  
Chromic Acid ◽  
Low Cost ◽  
Acid Etching ◽  
Crystalline Morphology ◽  
Bulk Specimen ◽  
Morphological Studies ◽  
Perfect Form ◽  
Molecular Length ◽  
Lamellar Texture ◽  
Cost Studies

Polyethylene is one of the most important plastics produced today because of its good physical properties, ease of fabrication and low cost. Studies to improve the properties of polyethylene are leading to an understanding of its crystalline morphology. Polyethylene crystallized by evaporation from dilute solutions consists of thin crystals called lamellae. The polyethylene molecules are parallel to the thickness of the lamellae and are folded since the thickness of the lamellae is much less than the molecular length. This lamellar texture persists in less perfect form in polyethylene crystallized from the melt.Morphological studies of melt crystallized polyethylene have been limited due to the difficulty of isolating the microstructure from the bulk specimen without destroying or deforming it.

Glass Knife Geometry as Seen by the SEM

1971 ◽  
Vol 29 ◽  
pp. 454-455
Author(s):  
J. Temple Black
Keyword(s):  
Low Cost ◽  
Amorphous Material ◽  
Stress Concentrations ◽  
Basic Tool ◽  
Tool Materials ◽  
Optical Inspection ◽  
Surface Flaws ◽  
Slip Planes ◽  
Glass Knife ◽  
Diamond Knife

In ultramicrotomy, the two basic tool materials are glass and diamond. Glass because of its low cost and ease of manufacture of the knife itself is still widely used despite the superiority of diamond knives in many applications. Both kinds of knives produce plastic deformation in the microtomed section due to the nature of the cutting process and microscopic chips in the edge of the knife. Because glass has no well defined slip planes in its structure (it's an amorphous material), it is very strong and essentially never fails in compression. However, surface flaws produce stress concentrations which reduce the strength of glass to 10,000 to 20,000 psi from its theoretical or flaw free values of 1 to 2 million psi. While the microchips in the edge of the glass or diamond knife are generally too small to be observed in the SEM, the second common type of defect can be identified. This is the striations (also termed the check marks or feathers) which are always present over the entire edge of a glass knife regardless of whether or not they are visable under optical inspection. These steps in the cutting edge can be observed in the SEM by proper preparation of carefully broken knives and orientation of the knife, with respect to the scanning beam.

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