scholarly journals Investigation of metrological parameters of measuring system for small temperature changes

2014 ◽  
pp. 52-56
Author(s):  
М. Г. Самынина ◽  
◽  
В. А. Шигимага
Keyword(s):  
Measuring System ◽  
Small Temperature ◽  
Temperature Changes ◽  
Metrological Parameters

scholarly journals ANALYSIS OF ANNUAL VARIATIONS IN GROUND TEMPERATURE AT AN OTTAWA SITE

1964 ◽  
Vol 1 (2) ◽  
pp. 146-157 ◽  
Author(s):  
L. W. Gold
Keyword(s):  
Gradual Increase ◽  
Ground Temperature ◽  
Small Temperature ◽  
Temperature Changes ◽  
Annual Variations ◽  
Periodic Fluctuations ◽  
A Site

Observations over a 5-year period at a site at Ottawa showed that the ground temperature had significant Fourier components with period [Formula: see text]and 2 years. The average annual ground temperature and amplitudes of the Fourier components of period 1 year and [Formula: see text] year underwent non-periodic fluctuations of almost 1 C degree at a depth of 10 cm. The amplitude of this fluctuation decreased with depth, and its maximum occurred later in time. There was evidence of a gradual increase in average annual ground temperature amounting to about 0.2 C degree over the 5-year period at the 610-cm depth. The significance of such small temperature changes in areas where the ground temperature is close to 0 °C is pointed out.

Small temperature changes matter

2018 ◽  
Vol 1 (4) ◽  
pp. 235-235
Author(s):  
Jan-Stefan Völler
Keyword(s):  
Small Temperature ◽  
Temperature Changes

Modification des pressions intracristallines et intergranulaires des roches soumises aux variations de temperature

1961 ◽  
Vol S7-III (4) ◽  
pp. 338-344 ◽  
Author(s):  
Georges Deicha
Keyword(s):  
Small Temperature ◽  
Temperature Changes ◽  
History Of ◽  
Proper Perspective ◽  
Proper Interpretation ◽  
Tectonic Movements ◽  
Natural Means

Abstract Effects of variations of temperature on intracrystalline and intergranular pressures in rocks are reviewed, with particular stress on the importance of maintaining the several factors involved in proper perspective, in order that sequence of changes in a rock during its history may not be misconstrued and that undue importance is not assigned to a given factor merely because it has been investigated in detail while others have been investigated inadequately. Distinguishing between liquid and gaseous inclusions of mineralogic versus metallogenic periods is especially difficult. Proper interpretation of inclusions ruptured by natural means must be supplemented by painstaking care to recognize the ruptures resulting from artificial means such as those produced in preparation of petrographic specimens, blows of the geologic hammer , and during transportation of samples. Liquid CO<2) and other inclusions have been known to rupture from small temperature changes. Water in inclusions in mineral grains can influence the geochemical constitution of water imprisoned in the sediments at time of deposition. Tectonic movements may rupture inclusions, and thereby influence the geophysical history of rocks.

scholarly journals FID navigator-based MR thermometry method to monitor small temperature changes in the brain of ventilated animals

2014 ◽  
pp. n/a-n/a
Author(s):  
Nicolas Boulant ◽  
Michel Bottlaender ◽  
Lynn Uhrig ◽  
Eric Giacomini ◽  
Michel Luong ◽  
...  
Keyword(s):  
Mr Thermometry ◽  
Small Temperature ◽  
Temperature Changes ◽  
The Brain

Device for the Precise Measurement of Small Temperature Changes

1964 ◽  
Vol 35 (6) ◽  
pp. 729-732 ◽  
Author(s):  
Richard Conley La Force ◽  
S. Frederick Ravitz ◽  
Weston B. Kendall
Keyword(s):  
Precise Measurement ◽  
Small Temperature ◽  
Temperature Changes

scholarly journals Статический и динамический вклады в расщепление основного состояния Eu-=SUP=-2+-=/SUP=- в SrMoO-=SUB=-4-=/SUB=-

2019 ◽  
Vol 61 (5) ◽  
pp. 905
Author(s):  
А.Д. Горлов
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Impurity Center ◽  
Spin Hamiltonian ◽  
Lattice Thermal Expansion ◽  
Epr Spectrum ◽  
Small Temperature ◽  
Temperature Changes ◽  
Hamiltonian Parameters ◽  
Static Lattice

AbstractThe EPR spectrum of an Eu^2+ impurity center in a SrMoO_4 single crystal in the temperature range T = 1.8, 111–300 K has been studied, and the temperature changes in the spin Hamiltonian parameters describing the EPR spectrum of odd europium isotopes have been determined. It is shown that small temperature changes in the diagonal parameters of the spin Hamiltonian (for odd Eu^2+ isotopes) $$b_{2}^{0}$$ ( T ) = b _2( F ) + b _2( L ) and $$P_{2}^{0}$$ ( T ) = P _2( F ) + P _2( L ) are explained by the compensation of spin–phonon contributions b _2( F ) and P _2( F ) by the contributions of the lattice thermal expansion b _2( L ) and P _2( L ). The quantities b _2( L ) and P _2( L ) that are dependent on the static lattice parameters at a given temperature, are estimated in terms of the superposition Newman model. Then, the spin–phonon b _2( F ) and P _2( F ) contributions determined by the lattice ion vibrations are separated. An analysis shows that $$b_{2}^{0}$$ ( F ) and $$P_{2}^{0}$$ ( F ) > 0, b _2( L ) and P _2( L ) < 0, and the temperature behavior of the spin–phonon contribution is well described by G. Pfister’s model of local vibrations.

scholarly journals Analysis of the Vacuum-Steam Defrosting Process of Plums Pre-Treated with Dehydrofreezing

2020 ◽  
Vol 24 (1) ◽  
pp. 103-111
Author(s):  
Agnieszka Szparaga ◽  
Sławomir Kocira ◽  
Alaa Subr ◽  
Ameer Al-Ahmadi
Keyword(s):  
Frozen Storage ◽  
Sample Surface ◽  
Solution Concentration ◽  
Measuring System ◽  
Process Time ◽  
Temperature Changes ◽  
Sucrose Solutions ◽  
Osmotic Solution ◽  
Pre Treatment ◽  
Kinetics Of

AbstractThe research material was prune plums (Prunus domestica L.), subjected to osmotic pre-treatment, with variable process time parameters and osmotic solution concentration. Plums thus fixed were frozen and stored for 6 months. At even (monthly) intervals, the product was defrosted by the vacuum-steam method, using the s-p-p chamber, until the thermocouple indicated a temperature of 4ºC in the sample’s thermal center. In order to study the kinetics of phenomena occurring during the defrosting process, the chamber was equipped with a measuring system to enable measurement and recording of temperature changes in time in the geometric center of the sample, as well as the temperature on the sample surface. The conducted tests proved that the time of vacuum-steam defrosting of fruit depended on the amount of water contained in it. In plums dehydrated in 45-65% sucrose solutions, duration of the defrosting process was shortened already after three months of frozen storage. After 6 months of storage, defrosting of these fruits was twice as fast as that of control samples.

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