Variability of climatic characteristics оver the South-East Baltic coastal waters in the early XXI century
The study is focused on features of hydrometeorological conditions in the southeastern Baltic Sea and their trends assessment for 2005—2019 (climatic half period). The authors used the data from field observations of atmospheric pressure, wind direction and speed, and air temperature from the automatic hydrometeorological station located offshore, as well as the satellite data from the infrared and microwave (radar images) ranges to determine sea ice and sea surface temperature, respectively. The...
Climate change in the mountainous regions of the Republic of Tyva: The case of the Bay-Tayginsk district
The most considerable increase in the temperature of soil surface was observed in the cold period (1,5 °С, a 53,9% rise in temperature), the smallest in August (0,3 °С, 2,1 %), whereas, in May-June, the increase was negative (–1,3 °С, 27,1 %). Major increases in air temperature take place in April-July, September, and October (68,8 %), summer and winter accounted for 35,0 % and 29,9 % respectively. Soil surface and air temperature increased by 1,7ºС. In the warm period, air temperature is lower than...
The modelling of postmortem heat transfer and estimating the time of death
This article analyses different mathematical models of the process of postmortem heat transfer in an adult cadaver based on postmortem temperature dynamics. A model of heat transfer in a newborn cadaver presented as a finite cylinder is examined in detail. An important factor in constructing a mathematical model of postmortem heat transfer in a newborn aimed at identifying the time of death is body form approximation. It is shown that heat transfer in a cadaver is not sufficient for identifying the...
Hysteresis loops for a bulk ferromagnetic by Heisenberg model
In a framework of Heisenberg theory, that link quantum-statistical description taking Gauss distribution into account, explicit form is obtained by permutations group theory, the division paramagnetic/ferromagnetic is studied. The magnetization curves are built for a given set of parameters, such as exchange integral, number of closest neighbours and temperature. In a special range of the parameters a transition from unique solution of the resulting Heisenberg equation to multi-valued is observed...
Chlorophyll «a» concentration in the South-Eastern Baltic Sea in summer 2018 (on satellite data)
The study focuses on chlorophyll "a"concentration variability in the South-Eastern part of the Baltic sea in summer 2018. The data of the MODIS radiometer installed on Aqua and Terra satellites were used for the analysis. The average concentration of chlorophyll "a" in the warm period of 2018 (May-August) was 3.8 mg/m3 while the average sea surface temperature was 17.7° С. The Maximum concentration of chlorophyll "a" (8.1 mg/m3) was recorded in May. However, the most...
The dynamics of air temperature extrema as an indicator of climate warming in the Central Tuvan basin of the Tyva Republic
Climate warming results in an increase of air temperatures extrema. The dynamics of anomalies in air temperature absolute maxima are described through unusual biquadrate polynomials. The minimum peak was observed in 1989—1992, afterwards a steep increase followed. The authors examine the possibility of an increase in the frequency of air temperature anomalies in the form of heat waves. The patterns of dynamics of anomalies in the absolute air temperature minima is accurately formalized through linear...
Development of a mathematical model for the process of rocket fuel bubbling with liquid nitrogen
To achieve an optimum temperature of rocket fuel, its negative temperature and the amount of its purification from impurities are necessary. For this purpose, a mathematical model of the temperature dependence inside the bubbler has been developed in this article.
Vybornov N. A., Protasevich M. N.
rocket, mathematical model, bubbler, temperature, rocket fuel, liquid nitrogen, transfer function
90-100
The flow of gas in a cylindrical channel at a subsonic speed
The article gives the account of steady flow of a perfect gas in a vertical channel having some other parameters set. The flow is supposed to be highspeed, subsonic and design, that is the gas pressure at the outlet equal to the pressure (back pressure), while the forces of gravity can be neglected. The boundary value problem is solves with the standard numerical method, the Mathcad in particular. The least squares method was used to find the empirical dependence of the heat nitrogen on the temperature...
About a role of vegetation of deserts of Central Asia in climate change
This article focuses on the temperature of various underlying surfaces (rubble-rock on hamadas, sand on the beds of temporary streams, plants) in the southern steppes of Mongolia. The authors present a comparative analysis of soil and plant temperature and address the issue of the impact of overgrowing of desert areas on climate change on Earth.
1. Дедков В. П. Экологическая ниша и водный баланс доминантов пустынных фитоценозов. Л., 1989.
2. Нурбердыев М. Радиационный и тепловой баланс пастбищ...
The characteristics of the energy spectrum of mixture ratio and air temperature in the troposphere of the Antarctic
This article analyses the characteristics of the energy spectrum of mixture ratio and air temperature in the troposphere of the Antarctic obtained by Fourier analysis. Selected peaks of spectral density of mixing ratio and air temperature monthly averages are interpreted as annual and semi-annual fluctuations. The spectral density of random function is considered as the energy spectrum of functions. It is shown that activity zones are present in the troposphere of the Antarctic.
1. Аверьянов В....
New data on air and soil temperature in vegetation communities of the Karakum Desert
This article offers data on the temperature of surface air and soils in the aeration zone. The author comes to the conclusion that the soil temperature in the Karakum desert is favourable for the development of tree and shrubbery species.
1. Гунин П. Д., Дарымов В. Я., Вейисов С. Ландшафтная характеристика Репетекского заповедника // Опыт изучения и освоения Восточных Каракумов. Ашхабад, 1972. С. 12—22.
2. Дедков В. П. Экологическая ниша и водный баланс доминантов пустынных фитоценозов. Л...
Sea surface temperature determination in the North Atlantic based on planktonic foraminifera with the help of diverse biometric methods
This article presents the results of the reconstruction of surface temperature above the northeast part of the Iceland basin (Northeast Atlantic) for the last 300,000 years with help of the M. S. Barash method, as well as the RAM, MAT and TFT methods on the basis of the planktonic foraminifera data. The M. S. Barash method helps calculate the mean annual sea surface temperature
changes, while the used nowadays MAT and RAM methods help calculate seasonal changes. The comparison of methods proves...
The closed piecewise uniform string revisited
We reconsider the composite string model introduced 30 years ago to study the vacuum energy. The model consists of a scalar field, describing the transversal vibrations of a string consisting of piecewise constant sections with different tensions and mass densities, keeping the speed of light constant across the section. We consider the spectrum using transfer matrices and Chebyshev polynomials to get a closed formula for the eigenfrequencies. We calculate vacuum and free energy as well as the entropy...
Oscillations, resonances and waves in a non-local medium with sources
New exact solutions are obtained for a spatially non-local wave equation with sources. The results are set out in the terms of the heat transfer theory. The non-locality of the problem is determined by the value of the fourth spatial derivative. We considered two types of volume energy sources which are alternating with respect to the temperature. For a technical source the derivative is positive, since «higher» temperatures arise from the energy release. For a biological source the source function...
Non-contact method for measuring the specific electrical resistance of liquid metals in the high temperature range
The article offers a new, non-contact method of measuring the specific electrical resistance of liquid metals in the high-temperature range, which is exceptionally simple. The essence of the method is the measurement of the electromotive force induced by a high-frequency electromagnetic field in two circuits of different diameters placed coaxially in the middle of a cylindrical sample, which is a thin-walled ampoule filled with some low-melting metal. The authors substantiate the feasibility of a...
Multiple RuO2-chip thermometer for applications in 0,02—30 K range
A multiple RuO2-chip thermometer based on commercial Vishay RCW575 chips for applications in 0,02—30 K range is proposed. Possible design and packaging of the sensor are suggested. Thermometer saturation and thermal resistance of our sensor are measured and compared with a single-chip configuration and commercial Lakeshore ROX-102A thermometer.
1. Yeager C. J., Courts S. S. A Review of Cryogenic Thermometry and Common Temperature Sensors // IEEE sensors journal. 2001. Vol. 1, № 4. P. 352—360...
Long-term forecast of water surface temperature in the southeastern part of the Pacific Ocean
The article examines the results of use of the physical-statistical method for the forecast of seasonal trend of the sea surface temperature (SST) with the lead time of 8 months and results of statistical method of SST superlong-term forecast, lead time — 1 year. In the first case mean-squared prediction error of SST according to independent data makes 0,5 оС, in the second case — 0,2 оС, that is much less than the reasonable mistake and meets practical requirements.
1.
Гордеева С.
М., Малинин...
The ontogenesis of Mysidacea Neomysis integer Leach, 1815 dependent on the water temperature in the Vistula Lagoon of the Baltic Sea
This article considers the impact of water temperature in the Vistula Lagoon of the Baltic Sea on Mysidacea ontogenesis, as well as their maturity rate, female fertility, reproductionrate and average energy cost of reproduction.
1.
Алимов А.
Ф
. Введение в продукционную гидробиологию. Л., 1989.
2.
Алексеев В.
Р., Хозяйкин А.
А
. Трансформация сезонных циклов у ветвистоусых ракообразных при слабых температурных воздействиях //
Труды Зоологического института РАН. 2009. Т. 313, №
1. С...
Temperature evolution of crystal structure of multiferroic Tb0.95Bi0.05MnO3
The temperature evolution of crystal structure of multiferroic Tb0.95Bi0.05MnO3 has been studied by powder neutron diffraction in the temperature range 100—450 K. It is shown that the lattice parameters and volume expansion coefficient demonstrate anomalies in the interval 150—250 K. These anomalies could be attributed with a phase separation observed earlier for this compound.
1.
Боков В.
А., Мыльникова И.
Е., Смоленский Г.
А.
// ЖЭТФ. 1962. Т. 42, №
2. С. 643—646.
2.
Смоленский...
The Evolution, or Seasonal and Interannual Variability, of the Diurnal Variation of Hydrometeorological Fields in the Southern Baltic Sea
We present the results of an analysis of field observations of the air temperature Ta, the dew point Td (relative humidity f), the sea-level atmospheric pressure P0, and the wind speed W. The data were obtained by a Mini- KRAMS-4 hydrometeorological facility installed within Russia’s exclusive economic zone in the southeastern Baltic Sea on the LUKOIL-KMN (D6) offshore ice-resistant fixed platform and at MARNET monitoring stations of the German Oceanographic Datacentre (BSH / DOD (M41)) in 2002—2016...
Simulating of non-stationary processes in the ionospheric plasma
A model of distribution of concentration, velocities and temperatures of ions along a geomagnetic flux tube is considered. The model also examines the main processes of chemical kinetics, ambipolar diffusion, influence of horizontal neutral wind and plasma heating by superthermal electrons. The article presents numerical calculation results of variations of charged particles concentration in the ionosphere and the plasmasphere. The comparative analysis of various hydrodynamic approximations for the...
Investigation of dependence of temperature coefficient of linear expansion on integrated intensity of the main peak of pyroceramics substrate
This paper presents the results of studies of the parameters of optical components of a glassceramic material CO-115 by X-ray diffractometry. The possibility of technological precision quality control glassceramic parts using X-ray diffraction methods. The direct dependence of the temperature coefficient of linear expansion of the integrated intensity of the X-ray diffraction peak at the glassceramic.
1. Галявов И. Р., Патрикеев А. П., Понин О. В. и др. Интерференционные дилатометры для измерения...
Optimization of the thin film Heusler alloys formation technique by the method of Pulsed laser deposition
Two methods of formating Heusler alloy Ni-Mn-In thin filmsby pulsed laser deposition were developed — two-lasers co-deposition and deposition in low argon pressure. Structural and magnetic properties of grown samples were investigated.
1. Graf T., Felser C., Parkin S. S. P. Simple rules for the understanding of Heusler compounds // Progress in Solid State Chemistry. 2011. № 39. Р. 1—50.
2. Васильев А. Н., Бучельников В. Д., Такаги Т. и др. Ферромагнетики с помощью формы // Успехи физических наук...
Numerical simulation of forming and evolution of solitons in chain of nucleotide couples
The Cauchy’s problem of the induced charge movement along the discrete chain of nucleotide couples in DNA is solved in the frame of Holstein’s model taking account surrounding temperature fluctuations. For the initial conditions chosen specifically the evolution of a special class of solutions of this problem related to the type of soliton is investigated. The existence of solutions in the form of solitary waves in the framework of this model is possible only at very low temperatures the thermostat...
Three-dimensional computational modelling of water cooling over the coastal slope: a comparison of hydrostatic and non-hydrostatic solutions
This article addresses the structure and dynamics of current and temperature fields in the coastal zone of a large water body generated by seasonal variations of heat-exchange conditions at the water surface. Numerical solutions of three-dimensional hydrostatic and non-hydrostatic models MIKE3-FlowModel in shallow and deep parts of the basin are compared. It is shown that the structure of fields is reproduced adequately by both models and water currents are similar; however, the hydrostatic model...
Modeling of H Thermal Ions Measurements onboard Charged Satellite Taking into Account Anisotropy of Temperature
The mass-spectrometer model of thermal ionospheric ions measurements was considered in case of charged satellite. Hyperboloid device characteristics onboard Interball-2 satellite was used for mathematical model of measurements. It was shown that angular ion distribution function changed due to temperature anisotropy and it can be interprets by different ways. Positive satellite potential increases these effects.
1.
Hamelin
M
.,
Bouhram
M
.,
Dubouloz
N
.
et
al
.
Combined effects of satellite...
Determination of Psychological Stress of Executive Officers
The article considers the determination of executive officers' psychological stress and the role of temperament in stress emergence and management at work. The author offers the scheme and results of the research conducted in Kaliningrad with the participation of business managers.
1.
Вяткин Б.
А., Жданова С.
Ю.
Психология ...
Shifts of adulterations as the result of seasonal horizontal convection under the shelf plate (numerical modeling)
The article shows that the water dynamics induced by differential cooling in upper shelf area (down to 60 m depth) is significantly influenced by day/night variations which delays an establishing of a seasonal water-exchange in shallows. Convective exchange flows within the entire shelf region in seasonal circle requires 4—7 weeks to reach a quasisteady state. Formation of a linear portion on the horizontal temperature profile can be used as an indicator of the approaching of the flow to the steady...
The ecological and biological characteristics of plants in the course of forcing
This article analyses the storage conditions for hybrid lily bulbs in the course of forcing. The authors come to the conclusion that taller plants are obtained after a three week storage at a constant low temperature. The time span between planting and flowering is 60—75 days. The optimal temperature for plant storage during forcing rages from 18 to 20 °С.
1.
Интродукция
растений в Главном ботаническом саду им. Н.
В. Цицина: к 50-летию основания / С.
Е. Коровин [др.]. М., 1985.
2.
Методика...
Climate Change Impact on the Curonain Lagoon Eutrophication Level
The article presents the results of many years' research (1991-2007) on the chlorophyll and nutrient concentrations, biomass and primary production of phytoplankton in the Curonian Lagoon. The main factors affecting the level of biological production and the trophic status are determined by the comparison of hydrological and chemical indicators. Water temperature is a key environmental factor that regulates the phytoplankton production and abundance in the Curonian Lagoon. The greater seasonal rise...
Health expenditures and health outcomes in Central Europe and the Baltic Region
In Central Europe and the Baltic region, healthcare expenditure has been growing slightly faster than across the euro area and in OECD countries. However, health outcomes as regards chronic diseases prove to be modest in the euro area and OECD countries compared to Central Europe and the Baltic region. Panel data analysis and country-specific regressions were conducted using World Bank data spanning from 2000 to 2019. Evidence suggests a significant correlation between private and current health...