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Tytuł:
Comparison finite element analysis on duralium strength against multistage artificial aging process
Autorzy:
Tsamroh, D.I.
Powiązania:
https://bibliotekanauki.pl/articles/2175783.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
mechanical properties
duralium
multistage artificial aging
finite element analysis
riveting
właściwości mechaniczne
wieloetapowe sztuczne starzenie
analiza elementów skończonych
nitowanie
Opis:
Purpose: To analyze and estimate the strength of duralium rivets which had been treated by using multistage artificial aging compared with duralium that had not been treated. This processwas necessary to be conducted in riveting process effectively. Duralium has been widely used in aerospace industry, one of duralium usage in aerospace industry is aircraft fittings such as rivet. Riveting is one of method that used for joining airframe structural components. During riveting process, the load transfer causing stress that led to the fatigue. Riveting process also causes deformation on the rivet and sheet metal. Deformation that occurs on the rivet will affect the performance of rivet structure. Thus, duralium rivet was analyzed its total deformation, shear stress, and its equivalent stress Von Misses. Design/methodology/approach: that used in this study was finite element analysis. Geometry of rivet that used in this study was drawn by using Autodesk Inventor Professional 2018. While total deformation, shear stress and equivalent stress Von Mises on duralium rivets were found out by using ANSYS Workbench 18.1. Findings: Comparison result was obtained between duralium rivet with and without treatment of multistage artificial aging. The result shown that total deformation, shear stress and equivalent stress Von Mises which obtained by duralium rivet with multistage artificial aging had the lower value than duralium rivet without multistage artificial aging. Duralium rivet with multistage artificial aging could be used as aircraft fitting which had the higher strength. Research limitations/implications: Direct experiment on duralium rivet had not been done yet, this study only did simulation based on data that obtained form previous research that had been conducted by the researcher. Practical implications: Duralium rivet with multistage artificial aging had lower value on total deformation, shear stress, and equivalent stress Von Misses, thus duralium rivet with multistage aritificial aging had a higher strength. Originality/value: Application of duralium as a rivet with treatment of multistage artificial aging.
Źródło:
Archives of Materials Science and Engineering; 2021, 109, 1; 29--34
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Traffic Noise Models for Curved Roads
Autorzy:
Popescu, D. I.
Cosma, I.
Powiązania:
https://bibliotekanauki.pl/articles/176976.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
traffic noise
noise source modelling
sound field
curved road
Opis:
The paper presents two theoretical models for traffic noise level distribution on curved horizontal roads. In the case of vehicles moving on a given route, one can consider, in terms of sound field, that the granular traffic is equivalent for short periods with a quasi-continuous noise flow. When computing and modelling the noise level generated by traffic on roads with complex trajectory, it is common to treat the route as a sum of small length road segments, each being assimilated with a linear noise source. This paper started from the assumption that the route can be decomposed into a sequence of linear and arc-shaped road segments, each of which is treated as a linear respectively curved noise source. An arc-shaped road segment is modelled by a tubular vibrating surface, of circular or rectangular section. In the case of rectangular section, the vibrating blade emits complex sounds on its both vertical sides and the generated sound field can be described more clearly, qualitatively and quantitatively, through intensity distribution. The theoretical models presented in the paper have direct application to the traffic noise prediction and noise maps drawing.
Źródło:
Archives of Acoustics; 2016, 41, 2; 309-314
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrides precipitation in Ti6Al4V titanium alloy used for airframe manufacturing
Autorzy:
Băilă, D. I.
Tonoiu, S.
Powiązania:
https://bibliotekanauki.pl/articles/200617.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrides precipitation
Ti6Al4V alloy
hydrogen embrittlement
pitting corrosion
wytrącanie wodorków
Stop Ti6Al4V
kruchość wodorowa
korozja wżerowa
Opis:
The aeronautical industry is a sector constantly looking for new materials and equipment because of its tendency to expand quickly. The Ti6Al4V titanium alloy is used frequently in the aeronautic, aerospace, automobile, chemical and medical industry because it presents high strength combined with low density (approximately 4.5 g/cm3), good creep resistance (up to 550°C), excellent corrosion resistance, high flexibility, good fatigue and biocompatibility. As a result of these properties, this titanium alloy is considered an excellent material for manufacturing structural parts in the aircraft industry for modern aeronautic structures, especially for airframes and aero-engines. But its use is also problematic because the Ti6Al4V titanium alloy manifests hydrogen embrittlement, by means of hydrides precipitation in the metal. The Ti6Al4V alloy becomes brittle and fractures because of hydrogen diffusion into metal and because titanium hydrides appear and create pressure from within the metal, thus generating corrosion. Because of titanium hydrides, the titanium alloy suffers from reduced ductility, tensile strength and toughness, which can result in fractures of aeronautical parts. This poses a very serious problem for aircrafts. In this paper, rapid hydrogen embrittlement is presented along with XRD, SEM and TEM analysis. Its goal is to detect the presence of titanium hydrides and to spot the initial cracks in the metallic material.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 643-649
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The peculiarities of antioxidant-prooxidant balance of kidney’s papillary layer in skeletal and craniocerebral injuries and their combinations
Autorzy:
Merlev, D.I.
Gudyma, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/1032377.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
skeletal trauma
traumatic brain injury
multitrauma
kidney
lipid peroxidation
antioxidant protection
Opis:
Skeletal and craniocerebral injuries simulating and their combinations within the papillary layer of a kidney is leading to a significant shift of antioxidant-prooxidant ratio with prevailing Pro-oxidant mechanisms. These mechanisms are enlarging from the first to the seventh day of the posttraumatic period and significantly higher against the background of combined cranio-skeletal injuries on the 3rd and on the 7th day of post-traumatic period.
Źródło:
Journal of Health Sciences; 2014, 4, 1; 135-144
1429-9623
Pojawia się w:
Journal of Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bulbospinal catecholamine neurones and sympathetic pattern generation
Autorzy:
Coote, J H
Lewis, D.I.
Powiązania:
https://bibliotekanauki.pl/articles/70075.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
catecholamine neuron
sympathetic pattern generation
brain tissue
preganglionic neuron
dopamine
noradrenaline
cardiovascular system
rat
Źródło:
Journal of Physiology and Pharmacology; 1995, 46, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring the Reaction and Response of People to Urban Noise
Autorzy:
Popescu, D. I.
Moholea, I. F.
Powiązania:
https://bibliotekanauki.pl/articles/178048.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
urban noise
noise pollution
noise annoyance
social survey
Opis:
An important aspect in assessing noise in urban agglomerations is the subjective one, which takes into account the sensitivity and specific reactions of residents to the noise in their living environment. This paper presents results of a sociological study initiated to determine the population awareness, regarding the urban acoustic environment and estimation of effects and disturbance. The survey was conducted in a Romanian city, to complement the information provided by the strategic noise map of the area. This approach allows the estimation of specific local patterns of reaction and response to urban noise of the exposed population and provides the information, needed to develop action plans and to set proper solutions for urban area planning.
Źródło:
Archives of Acoustics; 2010, 35, 2; 237-244
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface layer desalination of the bays on the east coast of Novaya Zemlya identified by shipboard and satellite data
Autorzy:
Glukhovets, D.I.
Goldin, Y.A.
Powiązania:
https://bibliotekanauki.pl/articles/48910.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
surface layer
desalination
salinity
fluorescence
Kara Sea
Novaya Zemlya Archipelago
satellite data
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plutonium isotopes 238Pu, 239+240Pu, 241Pu and 240Pu/239Pu atomic ratios in the southern Baltic Sea ecosystem
Autorzy:
Struminska-Parulska, D.I.
Skwarzec, B.
Powiązania:
https://bibliotekanauki.pl/articles/47991.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
plutonium isotope
plutonium concentration
Baltic Sea
ecosystem
Chernobyl disaster
atmospheric fallout
marine sample
accelerator mass spectrometry
Opis:
The paper summarizes the results of plutonium findings in atmospheric fallout samples and marine samples from the southern Baltic Sea during our research in 1986–2007. The activities of 238Pu and 239+240Pu isotopes were measured with an alpha spectrometer. The activities of 241Pu were calculated indirectly by 241Am activity measurements 16–18 years after the Chernobyl accident. The 240Pu/239Pu atomic ratios were measured using accelerator mass spectrometry (AMS). The 241Pu activities indicate that the main impact of the Chernobyl accident was on the plutonium concentration in the components of the Baltic Sea ecosystem examined in this work. The highest 241Pu/239+240Pu activity ratio was found in sea water (140 ± 33). The AMS measurements of atmospheric fallout samples collected during 1986 showed a significant increase in the 240Pu/239Pu atomic ratio from 0.29 ± 0.04 in March 1986 to 0.47 ± 0.02 in April 1986.
Źródło:
Oceanologia; 2010, 52, 3; 499-512
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decision of the direct position problem of the joint relative manipulation mechanism with five degrees of freedom
Autorzy:
Pashchenko, V. N.
Meleshchenko, D. I.
Rashoyan, G. V.
Malyshev, D. I.
Kuzmina, V. S.
Powiązania:
https://bibliotekanauki.pl/articles/266251.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
kinematyka
niezawodność maszyn
manipulator równoległy
kinematics
machine reliability
parallel manipulator
Opis:
One of the mechanisms of joint relative manipulation with five degrees of freedom is considered. An approach to solving the direct positional problem is described. A simplified 3D model was created to verify the correctness of the solution. The results of a comparison of calculated and experimental data are presented.
Źródło:
International Journal of Applied Mechanics and Engineering; 2018, 23, 4; 1025-1033
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ground penetrating radar for underground sensing in agriculture: a review
Autorzy:
Liu, X.
Dong, X.
Leskovar, D.I.
Powiązania:
https://bibliotekanauki.pl/articles/26587.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Belowground properties strongly affect agricultural productivity. Traditional methods for quantifying below- ground properties are destructive, labor-intensive and point-based. Ground penetrating radar can provide non-invasive, areal, and repeatable underground measurements. This article reviews the application of ground penetrating radar for soil and root measurements and discusses potential approaches to overcome challenges facing ground penetrating radar-based sensing in agriculture, especially for soil physical characteristics and crop root measurements. Though advanced data-analysis has been developed for ground penetrating radar-based sensing of soil moisture and soil clay content in civil engineering and geosciences, it has not been used widely in agricultural research. Also, past studies using ground penetrating radar in root research have been focused mainly on coarse root measurement. Currently, it is difficult to measure individual crop roots directly using ground penetrating radar, but it is possible to sense root cohorts within a soil volume grid as a functional constituent modifying bulk soil dielectric permittivity. Alternatively, ground penetrating radar-based sensing of soil water content, soil nutrition and texture can be utilized to inversely estimate root development by coupling soil water flow modeling with the seasonality of plant root growth patterns. Further benefits of ground penetrating radar applications in agriculture rely on the knowledge, discovery, and integration among differing disciplines adapted to research in agricultural management.
Źródło:
International Agrophysics; 2016, 30, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocenka zhivuchesti otdelno stojashhikh fundamentov na osnove izuchenija processa ikh razrushenija
Evaluate the survivability of a detached foundation based study of their destruction
Autorzy:
D'jakov, I.
Powiązania:
https://bibliotekanauki.pl/articles/78034.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
survivability
foundation
building resistance
destruction
geometrical characteristics
structure
design
bearing capacity
strength characteristics
experimental study
Opis:
Survivability foundation plays an important role in building resistance to the progressive destruction. This should be taken into account in the relevant calculations. Experimental studies of free-standing foundations have identified stages of structural collapse. Determine the ratio of the breaking load and the calculated bearing capacity. Reserve of vitality depends on the foundations of a large number of factors: the geometric characteristics of the structure, the design features, the strength characteristics of the materials, the eccentricity of external forces and others.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nekotorye osobennosti primenenija podkhodov edinichnojj zhivuchesti k ocenke svajjhykh uderzhivajushhikh sooruzhenijj
Application of the approach of unit vitality to evaluate the survivability of the pile restraint of structures
Autorzy:
D'jakov, I.
Powiązania:
https://bibliotekanauki.pl/articles/76907.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
survivability
pile retaining structure
persistence
destruction
building
soil mass
calculation model
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Restoring the dignity of the nursing and midwifery professions in a confrontation with the psychological and psychiatric consequences of a terrorist attack on the human body
Autorzy:
Mazurkiewicz, D.W.
Piechocka, D.I.
Strzelecka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1918529.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
y. Keywords: Mental disorders
terrorism
public health
scope of practice
symptoms.
Opis:
On October 9-10, 2017, the International Scientific Conference „Polish, European and Global Nursing” was held in Warsaw, Poland. The main organizer of the conference was the National Council of Nurses and Midwives in Warsaw. The event was an excellent opportunity to seriously discuss the situation of nurses and midwives and other topics in a large group of experts, pondering such issues as how to restore the dignity and prestige of the profession, and also how to initiate a discussion on the psychological and psychiatric consequences of a terrorist attack on the human body.
Źródło:
Progress in Health Sciences; 2017, 7(2); 131-133
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical solutions for the control and command system of a Plasma Focus device
Autorzy:
Martin, D. I.
Zoita, V. I.
Cotruta, D. A.
Jianu, A. V.
Ighigeanu, D. I.
Bestea, V. I.
Powiązania:
https://bibliotekanauki.pl/articles/147621.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
control system
electromagnetic transients
galvanic separation
plasma focus
Opis:
The paper presents the technical problems related to the electrical control and command system (ECC system) for the plasma focus installation IPF-4/5A having the following main parameters: 1 MA plasma current and 40 kJ energy stored at 20 kV charging voltage. The ECC system applies 23 interlocked logical commands, acquires and processes 28 logical states, acquires, processes and displays continuously the main slow-varying signals coming from IPF-4/5A subassemblies. All the plasma focus installation operational sequences are governed by strict hard and soft interlocking using in parallel two control and command systems: one based on PC-control methods and another based on classical control techniques.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 89-91
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plutonium isotopes 238Pu, 239+240Pu and 241Pu in the Baltic Sea ecosystem
Autorzy:
Strumińska, D. I.
Skwarzec, B.
Mazurek-Pawlukowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/147762.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plutonium
238Pu
239,240Pu
241Pu
Baltic Sea
Chernobyl accident
Opis:
In the paper there are presented the results of plutonium 238Pu, 239+240Pu and 241Pu determination in different samples of the Baltic Sea environment. 238Pu and 239+240Pu isotopes were measured in alpha spectrometer and 241Pu results were calculated indirectly by activity measurements of 241Am isotope increase from b-emitting 241Pu in 16-18 years after Chernobyl accident. The results indicate that the Baltic organisms accumulate plutonium from environment and the bioconcentration factors (BCF) range from 100 for fish to 27,000 for priapulida (benthic organisms) and only 0.1% of total plutonium is deposited in living organisms. Almost whole plutonium is deposited in Baltic sediments (about 99%). The results of 241Pu determination indicate that after Chernobyl accident indicate on its high concentration in analyzed components of the Baltic Sea ecosystem and the highest value of the activity ratios 241Pu/239+240Pu were found in seawater (140).
Źródło:
Nukleonika; 2005, 50,suppl.1; 45-48
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical torques and forces in birefringent microplate
Autorzy:
Zenkova, C. Y.
Ivanskyi, D. I.
Kiyashchuk, T. V.
Powiązania:
https://bibliotekanauki.pl/articles/174384.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
evanescent wave
spin angular momentum
birefringent microplate
Opis:
The paper presents a theoretical model for calculating the optical forces caused by the density of spin and orbital momentum and optical torque, caused by the angular momentum typical for a circularly polarized beam or a circular component of an elliptically polarized beam. Total internal reflection at the plate–air interface implemented by the birefringent plate spattered with nanoparticles of gold creates the conditions for the allocation of the predominant action of the vertical spin of the evanescent wave, which has recently been predicted theoretically.
Źródło:
Optica Applicata; 2017, 47, 3; 483-493
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predictive Maintenance Sensors Placement by Combinatorial Optimization
Autorzy:
Borissova, D. I.
Mustakerov, I. C.
Doukovska, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/227278.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
predictive maintenance
optimal sensors placement
combinatorial optimization
Opis:
The strategy of predictive maintenance monitoring is important for successful system damage detection. Maintenance monitoring utilizes dynamic response information to identify the possibility of damage. The basic factors of faults detection analysis are related to properties of the structure under inspection, collect the signals and appropriate signals processing. In vibration control, structures response sensing is limited by the number of sensors or the number of input channels of the data acquisition system. An essential problem in predictive maintenance monitoring is the optimal sensor placement. The paper addresses that problem by using mixed integer linear programming tasks solving. The proposed optimal sensors location approach is based on the difference between sensor information if sensor is present and information calculated by linear interpolation if sensor is not present. The tasks results define the optimal sensors locations for a given number of sensors. The results of chosen sensors locations give as close as possible repeating the curve of structure dynamic response function. The proposed approach is implemented in an algorithm for predictive maintenance and the numerical results indicate that together with intelligent signal processing it could be suitable for practical application.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 2; 153-158
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex diagnostics of crop yield in ecological trials of cereal cultivars
Autorzy:
Lykova, N.A.
Vilichko, A.K.
Alexeeva, D.I.
Powiązania:
https://bibliotekanauki.pl/articles/9757392.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
diagnostics
crop yield
ecological trial
cereal
plant cultivar
plant disease
wheat
barley
fungal pathogen
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2004, 59, 4; 175-1762
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proba oceny jakosci nasion traw gazonowych za pomoca rentgenografii.
Autorzy:
Harkot, W.
Czarnecki, Z.
Alexeeva, D.I.
Velikanov, L.P.
Powiązania:
https://bibliotekanauki.pl/articles/76011.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Łąkarskie
Tematy:
trawy gazonowe
jakosc nasion
nasiennictwo
lakarstwo
rentgenografia
Źródło:
Łąkarstwo w Polsce; 2000, 03; 65-70
1506-5162
Pojawia się w:
Łąkarstwo w Polsce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Urban Noise Annoyance Between 2001 and 2013 : Study in a Romanian City
Autorzy:
Popescu, D. I.
Moholea, I. F.
Morariu-Gligor, R. M.
Powiązania:
https://bibliotekanauki.pl/articles/176299.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise annoyance
urban noise
socio-acoustic survey
Opis:
The paper presents results of three socio-acoustic surveys conducted in an interval of twelve years, between 2001 and 2013, in a large Romanian city, Cluj-Napoca. The purpose of the surveys was to assess the awareness of residents on urban noise and the extent to which the noise environment affects their everyday life, behavior and health. The surveys were conducted in 2001, 2009 and 2013. The questionnaire used in the first survey had 16 questions and it was verified prior to study through a pilot survey, being corrected and improved. For the second and the third study, the questionnaire was enriched with eight more questions, regarding essentially the description of the residential area, criteria for its selection and also awareness about the noise map of the city. The analysis of responses defines the main characteristics of the local pattern of annoyance and reaction of the urban population to the environmental noise.
Źródło:
Archives of Acoustics; 2013, 38, 2; 205-210
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diversity in rhynchocephalian Clevosaurus skulls based on CT reconstruction of two Late Triassic species from Great Britain
Autorzy:
Chambi-Trowell, S.A.V.
Whiteside, D.I.
Benton, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/20656.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Clevosaurus was an early sphenodontian, known from many specimens and species from the Late Triassic and Early Jurassic. Here we describe and compare the cranial morphology of Clevosaurus hudsoni, the type species, and Clevosaurus cambrica, both from the UK, based on digital reconstructions from segmented CT scan data of two skulls. C. hudsoni has been described in some detail, but the CT data reveal new information on cranial anatomy, and C. cambrica is a newly described species for which the CT scans enable us to identify many previously undescribed bones, re-identify bones whose identity had previously been uncertain, and refine certain cranial elements. The near complete preservation of the left side of the skull of C. cambrica, and the preservation of much of the left side of the skull of C. hudsoni, provided us with the opportunity to fully reconstruct both species’ skulls in three dimensions. For the first time, coronoid bones are identified in Clevosaurus species from the British Isles. These two species show the diversity of morphology in the genus Clevosaurus. We provide evidence for two morphotypes of C. hudsoni based on study of the dentary dentition of the syntypes and other attributed specimens.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considerantions of motivation in public management
Argumentacja zarządzania w sektorze publicznym
Autorzy:
Constantin, D. I.
Kot, S.
Ciurea, V.
Bunaciu, M.
Grabara, I.
Powiązania:
https://bibliotekanauki.pl/articles/405843.pdf
Data publikacji:
2010
Wydawca:
Politechnika Częstochowska
Tematy:
zarządzanie publiczne
administracja publiczna
władza centralna
władza lokalna
public management
public administration
central authority
local authority
Opis:
The notion of public administration bears several acceptations, an activity one, of functional meaning and an organisational one. In both ways, public administration is indissolubly connected to the state. In default of the state, there is no public administration, as this is a state activity, performed by government bodies. This affirmation is confirmed by the stipulations of the Romanian Constitution, called public Authorities, chapter V, titled Public Administration. The first section intended for the specialised central public administration (ministry, other central bodies), and a second section is dedicated to the local public administration (county councils, local councils, mayors). There is no doubt that both sections refer to government bodies performing a state activity, so that the central specialised bodies of the public administration as well as the local bodies of the public administration are government bodies, and the activity they perform is a state one.
Pojęcie administracji publicznej możemy rozpatrywać jako działalność w sensie funkcjonalnym lub organizacyjnym. W obu przypadkach administracja publiczna jest nierozerwalnie związana z państwem. W przypadku braku państwa nie istnieje również administracja publiczna, ponieważ zalicza się ona do działalności państwa wykonywanej przez organy rządzące. Taki zapis jest ujęty w postanowieniach Konstytucji Rumunii: Władze Publiczne w rozdziale V zatytułowanym Administracja Publiczna. Pierwszy rozdział poświęcono wyspecjalizowanej centralnej administracji publicznej (ministerstwo oraz inne organy centralne), drugi rozdział jest poświęcony lokalnej administracji publicznej (władze hrabstwa, władze lokalne, burmistrz). Nie ma wątpliwości, że oba rozdziały odnoszą się do organów rządzących realizujących działania państwowe, zatem centralne wyspecjalizowane organy administracji publicznej jak i lokalne organy administracji publicznej są organami rządzącymi i prowadzona przez nie działalność stanowi działalność państwową.
Źródło:
Polish Journal of Management Studies; 2010, 2; 20-28
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Luminescent Probe for Highly Energetic Collisions in Mixtures of Complex Molecules with Acceptors of Vibrational and Triplet Energy
Autorzy:
Zalesskaya, G. A.
Yakovlev, D. L.
Sambor, E. G.
Baranovsky, D. I.
Powiązania:
https://bibliotekanauki.pl/articles/2008324.pdf
Data publikacji:
1999-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.50.+w
34.50.Ez
34.90.+q
Opis:
Pressure dependences of intensities and decay rates of time-resolved luminescence of acetophenone, benzophenone, anthraquinone were used to obtain the efficiencies of vibrational and triplet-triplet energy transfer. It was shown that vibrational relaxation of the chosen molecules can be interpreted in terms of two consecutive processes: rapid collisional relaxation of molecules from initially prepared states to a vibrational distribution at T$\text{}_{vib}$ by vibration-vibration process and relaxation of this vibrational distribution to the thermal one (vibration-translation process). At relatively small internal energy < 10000 cm$\text{}^{-1}$, the collisional efficiencies of the vibration-vibration process in mixtures with polyatomic bath gases had values typical of processes with a supercollision contribution. Molecules relaxed from the upper vibrational level to the vibrational distribution after several collisions (2-3). The average energies transferred per collision are well correlated with predictions of the simple ergodic theory of collisional energy transfer. The majority of the collisions took part only in vibration-translation energy transfer of relatively small energies. The efficiencies of triplet-triplet energy transfer were analyzed for acetophenone, benzophenone and anthraquinone as donors and biacetyl-acceptor in a gas phase when energy of about 20000 cm$\text{}^{-1}$ was transferred. It permitted us to elucidate the common features of highly energetic collisions. It was shown that the efficiencies are much lower than the gas kinetic ones and depended on the vibrational energy and temperature. It was discussed how to enhance triplet-triplet efficiencies due to vibrational excitation of a donor molecule.
Źródło:
Acta Physica Polonica A; 1999, 95, 6; 897-910
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural changes of loach embryos during embryogenesis under the influence of Flurenizyd
Zmiany strukturalne zarodków piskorza podczas embriogenezy przy działaniu flurenizydy
Autorzy:
Bodnarchuk, N.O.
Kulachkovsky, O.R.
Mandzynets, S.M.
Sanagurskiy, D.I.
Powiązania:
https://bibliotekanauki.pl/articles/2196800.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
loach
Misgurnus fossilis
embryo
structural change
embryogenesis
flurenizyd
ultrastructure
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2016, 34, 4; 19-30
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwość biodegradacji węglowodorów ropopochodnych w glebach zanieczyszczonych przez przemysł naftowy
Biodegradation potential of total petroleum hydrocarbons in oil industry contaminated soils
Autorzy:
Kopytko, M.
Mojica, D. M. I.
Powiązania:
https://bibliotekanauki.pl/articles/318710.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
bioremediacja
bioregeneracja
gleby
całkowita zawartość węglowodorów (TPH)
biorremediation
soils
total petroleum hydrocarbons (TPH)
Opis:
Zbadano gleby zanieczyszczone przez przemysł naftowy pochodzące z pola naftowego Santander w Kolumbii. Gleby charakteryzowały się trzema różnymi okresami trwania zanieczyszczenia związkami ropopochodnymi. Wszystkie badane gleby wykazywały szybką infiltrację i wysoką przepuszczalność, co jest charakterystyczne dla gleb piaszczystych. Pomimo to, hydrofobowy charakter węglowodorów miał wpływ na ich zdolność retencji wody i porowatość. Stosunek pierwiastków węgiel: azot, fosfor, temperatura i pH ocenione dla badanych gleb wykazywały optymalne wartości - odpowiednie dla procesu bioremediacji [bioregeneracji]. Najlepsze wyniki pod względem usuwania węglowodorów (42,6%) uzyskano wówczas, gdy próbki gleby oczyszczano oddzielnie, mieszając je z czystą, pozbawioną nie tylko dodatku wybranej i rozwiniętej mieszaniny drobnoustrojów, lecz również pozbawionej wstępnego działania bio-surfaktantów, (Serratia) gleby. Mieszanina gleb składająca się w 50% z gleby o najdłuższym okresie zanieczyszczenia oraz po 25% gleb o średnim i krótkim okresie zanieczyszczenia wykazała średni stopień usunięcia sumy węglowodorów ropopochodnych (TPH - total petroleum hydrocarbons) wynoszący 28,6%). Gleba ta została poddana wstępnemu działaniu biosulfactantu przez okres tygodnia oraz dodano do niej mieszanki drobnoustrojów na początku i w połowie trzytygodniowego okresu biodegradacji. Biorąc pod uwagę, że prowadząc biodegradację gleby używając wyłącznie mieszaniny zanieczyszczonych gleb do tego celu pozwala się uniknąć przenoszenia zanieczyszczenia do czystej gleby, i oczyszczanie za pomocą tej techniki pozwoliło osiągnąć 3,0% zawartości końcowej TPH (wartość zalecana przez Zarządzenie 29B Stanu Louisiana, stosowane w Kolumbii), takie oczyszczanie byłoby zalecane w połączeniu z optymalnymi stwierdzonymi warunkami oczyszczania.
Three sources of soil with different petroleum contamination ages were studied in an oil field in the province of Santander, Colombia. All the studied soils showed rapid infiltration and high permeability, characteristics of sandy soils. Nonetheless, water retention capacity and porosity were affected by the hydrophobic character of the hydrocarbons. The carbon-nitrogen-phosphorus ratio, temperature and pH evaluated in the contaminated soils, showed optimum values, adequate for bioremediation processes. The best results, in terms of hydrocarbon elimination (42.6%), were obtained when the soils were treated separately, mixed with clean soil, lacking not only the addition of the selected and enlarged mixed microbial pool, but also the pre-treatment with the bio-surfactant, which was composed by bacteria of the genus Serratia. The soil mixture composed of 50% of the soil with the oldest contamination, and an equal 25% proportion of both the medium and shortest contamination age soils, showed a total petroleum hydrocarbon (TPH) elimination percentage of 28,6%. This soil underwent one week of pretreatment process, and a mixed microbial pool addition at the beginning and half way through a three-week biodegradation treatment period. An independent remediation treatment, without addition of both pre-treatment and microbial pool was conceived for the initial treatment design. However, considering that biodegrading soil solely as a mixture of contaminated soils avoids the transfer of contaminants to the clean soil, and that the best treatment using this technique reached a 3,0% content of total hydrocarbons (value recommended by the Louisiana 29B regulation), this treatment was recommended combined with the optimum treatment conditions obtained.
Źródło:
Inżynieria Mineralna; 2009, R. 10, nr 2, 2; 31-48
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Calcination Temperature on the Optical and Mechanical Properties of Y2O3-MgO Nanocomposite
Autorzy:
Yong, S.-M.
Choi, D. H.
Lee, K.
Ko, S.-Y.
Cheong, D.-I.
Powiązania:
https://bibliotekanauki.pl/articles/351252.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
infrared transparent ceramics
Y2O3-MgO nanocomposites
sol-gel combustion synthesis
calcination
spark plasma sintering
Opis:
Y2O3-MgO nanocomposites are one of the most promising materials for hypersonic infrared windows and domes due to their excellent optical transmittance and mechanical properties. In this study, influence of the calcination temperature of Y2O3-MgO nanopowders on the microstructure, IR transmittance, and hardness of Y2O3-MgO nanocomposites was investigated. It was found that the calcination temperature is related to the presence of residual intergranular pores and grain size after spark plasma sintering. The nanopowders calcined at 1000°C exhibits the highest infrared transmittance (82.3% at 5.3 μm) and hardness (9.99 GPa). These findings indicated that initial particle size and distribution of the nanopowders are important factors determining the optical and mechanical performances of Y2O3-MgO nanocomposites.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1481-1484
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Additives on the Densification Processes and Properties of Silica-Based CMCs
Autorzy:
Ko, S.-Y.
Yong, S.-M.
Lee, S. J.
Cheong, D.-I.
Baek, S.
Powiązania:
https://bibliotekanauki.pl/articles/355134.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ceramic matrix composite
CMC
silica
densification
mechanical properties
Opis:
The effect of additives on the densification behavior and mechanical properties of pure and additive (Zr, B and Mg)-added silica ceramics were investigated for their application to the matrix phase of a silica fiber reinforced silica (SiO2 /SiO2f ) composite. The additives affected the rate of densification and crystallization (or transformation) of the amorphous silica. Among the compositions, pure silica ceramics sintered at 900°C for 1h showed the maximum flexural strength. Based on the results, SiO2 /SiO2f was fabricated by a repeated vacuum-assisted infiltration method followed by the heat treatment at 900°C for 1h. The relative density of the composite was 78.2% with a flexural strength of 22.4 MPa. Fractography revealed that the composite was damaged by strong bonding at the fiber/matrix interface and the fracture of fiber.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1485-1488
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new challenge for midwives and medical doctors in time of the threat of a mass terrorist attack and a life threatening mass disaster
Autorzy:
Mazurkiewicz, D.W.
Piechocka, D.I.
Miela, R.
Koniecko, K.
Sawka, J.H.
Strzelecka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1918645.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
life-threatening mass disaster
terrorism
maternity care
PMCD
PCD
scope of practice
Opis:
Purpose:To present the results of research and evaluation study of the legal regulations and rules directly linked and connected to midwives' scope of practice and provide a response on how the professional population of midwives can act as adequate and independent medical providers in the threat of a mass terrorist attack and/or a life-threatening mass disaster event. Materials and methods: The data derives from the Supreme Chamber of Nurses and Midwives in Poland; National Council of Nurses and Midwives in Poland; Gazette of the Republic of Poland, Journal of Laws; curriculum outlines for professional midwifery higher education in Poland; scientific literature, scientific recommendations. The qualitative research method to the data sources in 2018 were used. Results: In the event of a mass terrorist attack and/or a life-threatening mass disaster, the possibility of a pregnant, birthing or postpartum woman and her newborn obtaining proper medical attention from a midwife is questionable. Conclusions:The threat of terrorism in the European Union has grown. A new implications are necessary for policy and practice to keep midwives in their profession to provide adequate quality and quantity of health care in event of a mass terrorist attack and/or a life-threatening mass disaster. In our study we found: a terrorist threat as a gap in the teaching of obstetrics and midwifery; restricted availability of pharmacological agents for use by non-military midwives in event of a terrorist attack and/or a life-threatening mass disaster; lack of authorizations under a midwife license to perform PCD and /or PMCD.
Źródło:
Progress in Health Sciences; 2018, 8(2); 181-193
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
249 Conference Release from the Polish National Conference under the Honorary Patronage of the Minister of Health on “Occupational Safety for Nurses and Midwives”, September 10-11, 2018, Warsaw, Poland
Autorzy:
Mazurkiewicz, D.W.
Olejnik, B.
Koniecko, K.
Piechocka, D.I.
Sawka, J.H.
Strzelecka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1918774.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Aggression
occupational safety
bullying
chronic fatigue
mental and health disorders
Opis:
The National Council of Nurses and Midwives organized the Polish National Conference under the Honorary Patronage of the Minister ofHealth on “Occupational Safety for Nurses and Midwives,” held in Warsaw on September 10 –11, 2018. The main issues that were addressed concerned the following: Mental and health disorders in shift work; Aggression towards nurses and midwives; The effect of shift work on nurses’ health and functioning; Occupational biological hazards and risk of exposure to biological materials for nurses and midwives; Occupational causes and injuries for nurses and midwives; Occupational ergonomics for nurses and midwives.
Źródło:
Progress in Health Sciences; 2018, 8(2); 249-252
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A convergent approach for the synthesis of new pyrazolyl bipyridinyl substituted coumarin derivatives as antimicrobials
Autorzy:
Bhila, V. G.
Chovatiya, Y. L.
Patel, C. V.
Giri, R. R.
Brahmbhatt, D. I.
Powiązania:
https://bibliotekanauki.pl/articles/411982.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Coumarin
Bipyridine
Pyrazole
Kröhnke’s reaction
antimicrobial activity
Opis:
Some new 3-[3-(1-phenyl-3-aryl-1H-pyrazol-4-yl)acryloyl]coumarins 3a-f were synthesized (coumarin chalcones) by the condensation of various 3-acetyl coumarins 1 and appropriate 1-phenyl-3-aryl-1H-pyrazole-4-carbaldehyde 2. These coumarin chalcones 3a-f were then employed for the synthesis of pyrazolyl bipyridinyl substituted coumarins 7a-f, 8a-f, and 9a-f under Krohnke’s reaction condition. The characterization of all the synthesized compounds was carried out by elemental analysis, IR, 1H-NMR, 13C-NMR, DEPT-135 and mass spectral analysis. In addition to that, in vitro antimicrobial competency of the title compounds was assessed against selected pathogens. Compounds 3b, 3e, 7b, 8b, 8c and 9b exhibited excellent antimicrobial activity and said to be the most proficient members of the series.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 40; 1-16
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orientation States in Rhombic NdGaO$\text{}_{3}$
Autorzy:
Savytskii, D. I.
Ubizskii, S. B.
Vasylechko, L. O.
Syvorotka, I. M.
Matkovskii, A. O.
Powiązania:
https://bibliotekanauki.pl/articles/1964528.pdf
Data publikacji:
1997-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Mm
62.20.Dc
Opis:
The ferroelastic domain structure of NdGaO$\text{}_{3}$ is analyzed by three theories: group symmetry, tensor method and twinning by pseudosymmetry. The theories provide a coherent description of domain pairs and a determination of the position of W and S walls.
Źródło:
Acta Physica Polonica A; 1997, 92, 1; 231-236
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controlling and manipulation of red blood cells by evanescent waves
Autorzy:
Angelsky, O. V.
Zenkova, C. Y.
Maksymyak, P. P.
Maksymyak, A. P.
Ivanskyi, D. I.
Powiązania:
https://bibliotekanauki.pl/articles/174453.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
erythrocytes
evanescent wave
spin momentum
Opis:
A theoretical model for describing the influence of the evanescent wave on the red blood cell (RBC, erythrocyte) in the blood plasma is suggested in this research work. Two optical schemes for creating an evanescent wave and the features of the created field’s effect on the erythrocyte are considered. The conditions for the formation of optical forces and optical momentum, in particular, of the vertical spin of the evanescent wave, which causes a transverse displacement of the erythrocyte, are proposed. The use of a linearly polarized plane wave with azimuth of ±45° in a model experiment, specially suggested in this work, allows for visualization of the transverse controlled motion of the erythrocyte, which enables to claim about new possibilities for controlling microobjects in biology and medicine.
Źródło:
Optica Applicata; 2019, 49, 4; 597-611
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of environmental factors on concentration of trace elements in hip joint bones of patients after hip replacement surgery
Autorzy:
Lanocha, N.
Kalisinska, E.
Kosik-Bogacka, D.I.
Budis, H.
Sokolowski, S.
Bohatyrewicz, A.
Lanocha, A.
Powiązania:
https://bibliotekanauki.pl/articles/51409.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Opis:
The aim of this study was to assess the impact of environmental factors: cigarette smoking, dental amalgam fillings, eating habits and osteoporosis, on the concentrations of copper (Cu), zinc (Zn), lead (Pb), cadmium (Cd) and mercury (Hg) in the bone of hip joint in patients in the Orthopedics Clinic in Szczecin, Poland. Amalgam dental fillings had an effect on the Cu concentration in the cartilage with the adjacent compact bone, and on Hg concentration in the spongy bone. The highest concentrations of Cu and Hg were found in people with multiple amalgam fillings. Smoking appeared to influence Pb concentration in the cartilage with the adjacent compact bone, and Cd concentration in the spongy bone. Increased Pb was detected in smokers, and increased Cd in non-smokers. Diets rich in fish and seafood correlated with Cd concentration in the cartilage with adjacent compact bone. The greatest concentration was in people who ate fish or seafood at least once a month.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geostatistics - a tool applied to the distribution of Legionella pneumophila in a hospital water system
Autorzy:
Lagana, P.
Moscato, U.
Poscia, A.
La Milia, D.I.
Boccia, S.
Avventuroso, E.
Delia, S.
Powiązania:
https://bibliotekanauki.pl/articles/50389.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Colour Centres in SrLaAlO$\text{}_{4}$ and SrLaGaO$\text{}_{4}$ Single Crystals
Autorzy:
Ubizskii, S. B.
Savytskii, D.I.
Olijnyk, V. Ya.
Matkovskii, A. O.
Gloubokov, A.
Pajączkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1964350.pdf
Data publikacji:
1997-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.82.Ms
Opis:
Absorption spectra of SrLaAlO$\text{}_{4}$ and SrLaGaO$\text{}_{4}$ single crystals are investigated as well as their changes after irradiation by γ-quanta ($\text{}^{60}$Co source). Both crystals reveal a similar behaviour that is caused, as it seems, by the same nature of colour centres in them. The conclusion that oxygen defects as well as Fe impurities play a significant role in the colour centres formation in these crystals.
Źródło:
Acta Physica Polonica A; 1997, 92, 1; 163-168
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between concentrations of elements and geographic location in Poland
Autorzy:
Tomska, N.
Kosik-Bogacka, D.I.
Łanocha-Arendarczyk, N.
Szylińska, A.
Kotfis, K.
Sipak-Szmigiel, O.
Rotter, I.
Powiązania:
https://bibliotekanauki.pl/articles/28762825.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 283-290
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of tree diversity and stand structure on above-ground carbon storage in evergreen broad-leaved and deciduous forests in Southeast Vietnam
Autorzy:
Tuan, N.T.
Rodriguez-Hernandez, D.I.
Tuan, V.C.
Quy, N.V.
Obiakara, M.C.
Hufton, J.
Powiązania:
https://bibliotekanauki.pl/articles/2130199.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Biodiversity assessment
Ecosystem functioning
Taxonomic diversity
Natural forests
Stand structure
Opis:
Understanding the relationship between tree species diversity and above-ground carbon (AGC) storage in tropical forests is essential for a sustainable flow of ecosystem goods and services. Although tropical forests of Vietnam are of particular interest due to their high biodiversity and carbon density, few studies have evaluated the relative importance of species composition, tree species diversity and forest structure on AGC storage by forest vegetation type. In this study, we tested for the influence of taxonomic diversity, forest structure and species composition on AGC storage in evergreen broad-leaved and deciduous forests of Southeast Vietnam. Data was collected within 137 rectangular plots (25 m × 20 m), randomly selected across a deciduous forest (DF) and four evergreen broad-leaved forest (EB) categories, with different standing volumes levels: very poor (EBG), poor (EBP), medium (EBM) and rich (EBR). In total, we identified 3687 individuals from 110 tree species belonging to 46 families in 6.85 hectares of sampled area. AGC storage significantly differed among forest categories, ranging from 14.81 Mg ha−1 in EBG to 146.74 Mg ha−1 in EBR. There was higher AGC in the medium diameter class (20-40 cm), except for EBR where there was higher AGC within individuals of 40-60 cm in diameter. Taxonomic diversity was weakly correlated with AGC while stand structure (stem density and maximum diameter) were strongly correlated. Our results suggest that maintaining the abundance distributions of remnant tree species, particularly that of large trees, is one important method to enhance AGC storage in the tropical ecosytems of southern Vietnam.
Źródło:
Dendrobiology; 2022, 88; 38-55
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of perinatal lead exposure on intestinal microbiota of rats: preliminary results
Autorzy:
Kosik-Bogacka, D.I.
Baranowska-Bosiacka, I.
Czernomysy-Furowicz, D.
Lanocha-Arendarczyk, N.
Kolasa-Wolosiuk, A.
Galant, K.
Szymanski, S.
Powiązania:
https://bibliotekanauki.pl/articles/14526.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2019, 24, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dyslipidaemia, carbohydrate metabolism disorders and arterial hypertension detected in academic employees during examinations in occupational medicine
Autorzy:
Marcinkiewicz, A.
Śliż, D.I.
Olejniczak, D.
Price, S.
Kałużny, P.
Staniszewska, A.
Jankowski, P.
Mamcarz, A.
Walusiak-Skorupa, J.
Hanke, W.
Powiązania:
https://bibliotekanauki.pl/articles/28762765.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 314-318
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production and evaluation study for an oil with dissolved associated gas field in the Pannonian Depression
Badanie i szacowanie produkcji ropy naftowej z towarzyszącym rozpuszczonym gazem ziemnym na złożach Niziny Panońskiej
Autorzy:
Grigoras, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/299151.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
niezwiązany gaz ziemny
ropa naftowa
gaz ziemny
złoża
produkcja
otwory
zasoby
geologia
kondensat
non-associated gas
oil
condensate
natural gas
reservoir
production
wells
resources
reserves
geology
Opis:
The work targets are: - additional data analysis, - geological model update, - resources and reserves reevaluation in order to be confirmed, - optimum production scenario set up, - discounted cash flow analysis.
Celem pracy są: - analiza danych dodatkowych, - uzupełnianie modelu geologicznego, - potwierdzające szacowanie złóż i zasobów, - optymalny zestaw produkcyjny, - analiza kosztów.
Źródło:
AGH Drilling, Oil, Gas; 2012, 29, 1; 145-152
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production and evaluation study for a natural gas field in the North - Eastern part of the Getic Depression
Badanie produkcji i oszacowanie złoża gazu ziemnego w północno-wschodniej części niziny Getic
Autorzy:
Grigoras, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/299501.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
gaz "suchy"
gaz ziemny
złoża
produkcja
otwory
zasoby
rezerwy
geologia
seismika
non-associated gas
natural gas
reservoir
production
wells
resources
reserves
geology
seismics
Opis:
The work targets, reference date 01.01.2007, are: - additional data analysis: to the study (1998) and confirmed at 01.01.2000 and to the last study at reference date 01.01.2005, - geological model update according to 3D seismic data interpretation performed at the beginnig of the year 2007, - resources and reserves reevaluation in order to be confirmed, - optimum production scenario set up, - discounted cash flow analysis.
Celem przeprowadzonych bada referencyjnych (01.01.2007) były: - analiza dodatkowych danych: do badań (1998) i potwierdzonych 01.01.2000 i do ostatnich badań referencyjnych (01.01.2005), - ulepszenie modelu geologicznego zgodnie z interpretacją 3D danych sejsmicznych wykonanych na początku 2007 r., - potwierdzające oszacowanie zasobów i rezerw, - opracowanie scenariusz optymalnej produkcji, - analiza niższych przepływów pieniężnych.
Źródło:
Wiertnictwo, Nafta, Gaz; 2011, 28, 1-2; 153-161
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rehabilitation analysis of a natural gas field from the Transylvanian Depression
Analiza możliwości rekultywacji złoża gazu ziemnego w Zagłębiu Transylwanii
Autorzy:
Grigoras, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/299981.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
gaz ziemny
produkcja
rekultywacja
natural gas
production
rehabilitation
Opis:
The paper has the following objectives: Physical-geological and production data analysis; Natural gas resources estimation using statistical and material balance methods; Production history analysis; Production problems identification; Rehabilitation possibilities recommendation.
W artykule przeanalizowano fizyczno-geologiczne oraz produkcyjne dane, oszacowano wielkość złóż gazu ziemnego z użyciem metod analizy statystycznej i bilansu materiałowego. Ponadto dokonano analizy historii produkcji, problemów identyfikacji i na koniec podano zalecenia w zakresie metod rekultywacji.
Źródło:
Wiertnictwo, Nafta, Gaz; 2007, 24, 1; 211-221
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Core data statistical analysis for natural gas reservoirs from the Southern part of Transylvanian Depression
Analiza statystyczna rdzeni dla złóż gazu ziemnego w południowej części Zagłębia Transylwanii
Autorzy:
Grigoras, I.D.
Powiązania:
https://bibliotekanauki.pl/articles/300129.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
gaz ziemny
Zagłębie Transylwanii
natural gas
Transylvanian Depression
Opis:
The paper has the following targets: the statistical analysis for the parameters determined from the cores of the natural gas reservoirs of the Southern part of Transylvanian Depression, fulfilment of some correlations between these parameters, the analysis of the results of the correlations and a comparison analysis between the resulted parameters and the present parameters used in the volumetric estimation of the resources from the natural gas reservoirs
W artykule przedstawiono statystyczną analizę parametrów określonych na podstawie rdzeni pobranych w złożach gazu ziemnego w południowej części Zagłębia Transylwanii. Przytoczono niektóre korelacje parametrów, przeanalizowano wyniki korelacji, wyniki porównano i na tej podstawie dokonano oceny objętościowej zasobów gazu ziemnego
Źródło:
Wiertnictwo, Nafta, Gaz; 2006, 23, 1; 221-231
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy global sensitivity analysis of fuzzy net present value
Autorzy:
Sari, I. D.
Kuchta, D.
Powiązania:
https://bibliotekanauki.pl/articles/206340.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
fuzzy sensitivity analysis
fuzzy net present value
Opis:
The cash flows of an investment project are influenced by several factors. All the factors influencing fuzzy net present value of a project should be taken into account, together with their variability, in order to analyze the whole project, and to make the best decisions during the project’s life. In this paper a fuzzy global sensitivity analysis method is proposed for fuzzy net present value to determine the influences of the factors on the worth of an investment project. The results of the proposed method for an application are also interpreted.
Źródło:
Control and Cybernetics; 2012, 41, 2; 481-496
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural gas resources and reserves estimation study for the commercial field B
Oszacowanie zasobów i rezerw gazu ziemnego na przykładzie złoża przemysłowego B
Autorzy:
Grigoras, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/300315.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mapy
gaz ziemny
złoża
zasoby
sejsmika
metoda objętościowa
natural gas
resources
reserves
seismics
maps
volumetric method
Opis:
The paper has the following targets: the fulfillment of the first natural gas resources and reserves estimation study for the commercial field B, initial geological resources and reserves evaluation and classification in order to be confirmed by N.A.M.R., existent gas resources optimum production scenarios, Discounted Cash Flow analysis.
Celem pracy było udostępnienie pierwszych złóż gazu ziemnego i oszacowanie rezerw na terenie złoża B, ocena geologiczna złoża, jego klasyfikacja potwierdzona przez N.A.M.R., istniejące zasoby gazu ziemnego, optymalne scenariusze wydobycia i analiza kosztów.
Źródło:
Wiertnictwo, Nafta, Gaz; 2008, 25, 2; 299-304
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of underground natural gas storage in a reservoir from the Transylvanian Depression
Badanie podziemnych magazynów gazu ziemnego w złożu Zagłębia Transylwanii
Autorzy:
Grigoras, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/299983.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
podziemny magazyn
gaz ziemny
Zagłębie Transylwanii
underground storage
natural gas
Transylvanian Depression
Opis:
The paper has the following targets: the analysis of the geological model, the determination of the optimum storage and exploitation conditions and the evaluation of the possibilities of increasing the storage capacity of the reservoir.
W artykule dokonano analizy modelu geologicznego, a następnie określono optymalne warunki składowania i eksploatacji PMG. W dalszej kolejności oszacowano możliwości zwiększenia zdolności magazynowej złoża.
Źródło:
Wiertnictwo, Nafta, Gaz; 2007, 24, 1; 223-230
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regional discrepancies in the level of knowledge-based economy in Poland
Zróżnicowania regionalne gospodarki opartej na wiedzy w Polsce
Autorzy:
Bąk, I.D.
Powiązania:
https://bibliotekanauki.pl/articles/2216868.pdf
Data publikacji:
2023
Wydawca:
Akademia Bialska im. Jana Pawła II
Tematy:
knowledge-based economy
competitiveness
sustainable development
voivodeships
of Poland
zero unitarization method
Opis:
Subject and purpose of work: This paper analyzes the level of knowledge-based economy (KBE) in terms of sustainable development across the provinces (voivodships) of Poland in 2020. The underlying assumption of this study is that knowledge and skills are one of the fundamental preconditions for successfully implementing the concept of sustainable development. Materials and methods: In order to calculate the rankings of Polish voivodships a synthetic indicator developed on the basis of the zeroed unitarization method was used. Results: There are vast disproportions in the levels of KBE across the voivodeships of Poland. The most advanced KBE was identified in the Mazowieckie Voivodship, and the least developed KBE was found in the Lubuskie voivodship. Conclusions: The capacity to develop a knowledge-based economy is inextricably interrelated with the quality of the social capital, which is directly attributable to the levels of education. In order to offset the interregional disproportions spending on research and development needs to be increased and the investments in human capital (e.g. through career planning, training, improving the professional qualifications of employees, discretionary bonuses) and new technologies should be expanded.
Źródło:
Economic and Regional Studies; 2023, 16, 1; 1-17
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 1242

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