Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "E.Ch." wg kryterium: Autor

  Lista filtrów
Wyrównaj
Wyświetlanie 1-25 z 36
Tytuł:
Pyrotechnic Countermeasures: V. Performance of Spectral Flare Compositions Based on Aromatic Compounds
Autorzy:
Koch, E. Ch.
Powiązania:
https://bibliotekanauki.pl/articles/358551.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
spectral flare
aromatic compounds
decoy flare
pyrotechnic countermeasures
Opis:
The radiometric performance and burn rate of four spectral fare compositions (R-X) based on 1,4-dicyanobenzene (1), 3,5-dinitrobenzonitrile (2), E-stilbene (3) and 9,10-dihydroanthracene (4), potassium perchlorate and polyacrylate binder are described. The burn rates, spectral effciencies, Eλ, in both α- and β-band have been determined. The composition R-4 displays the highest effciency in both α- and β-band as well as lowest color ratio, θ B/A. R-1 yields the highest color ratio and second highest spectral effciency in β-band. For part IV see Ref. [1].
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 3-4; 55-63
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of a new scintillation crystal (LaBr3) in PET scanners using Monte Carlo method
Autorzy:
Karimian, A. E.
Thompson, Ch. J.
Powiązania:
https://bibliotekanauki.pl/articles/146815.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
PET
scintillation crystals
Monte Carlo
lanthanum bromide
Opis:
The main aim of this work is to investigate the use of new lanthanum bromide (LaBr3) in whole body PET (WB-PET) scanners and to compare the obtained results with those for BGO and LSO crystals which are currently used in conventional and dedicated PET systems. Our results show that there is a gain in noise effective count rate (NECR) arising from the reduced scatter and random fractions in a LaBr3 scanner. The spatial resolution of the WB-PET with LaBr3 is slightly worse than the LSO and BGO crystals because of its low density and effective atomic number. But our study showed the increased NECR, excellent energy resolution and low decay time of LaBr3 which promise a significant improvement in WB-PET performances especially for narrow coincidence windows.
Źródło:
Nukleonika; 2008, 53, 1; 5-6
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutrition and peritoneal dialysis patients – a review
Autorzy:
Kourkouta, L.
Monios, A.
Frantzana, E.
Iliadis, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/1917517.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
haemodialysis
renal failure
Diet
Peritoneal Dialysis
nutrition
Opis:
Introduction: The Peritoneal Dialysis (PD) is a preferable treatment option of the renal replacement in patients with chronic renal failure (CRF) end stage. Purpose: The purpose of this study was to review of articles published related to the contribution of nutrition to health promotion of patients undergoing haemodialysis.Materials and methods: A review of the Greek and international literature on the subject was Performed through the electronic databases Medline, Google Scholar, Scopus and the Association of Greek Academic Libraries Link (Heal-Link), using as key words the following terms:haemodialysis, renal failure, peritoneal dialysis, nutrition.Most of the articles used in this literature review were recently published. Only few old - dated articles were included in the study and the reason was their significant contribution to the field. The exclusion criteria for the articles were the languages except from English and Greek.Results:Patient’s diet must contain 1.3 g of protein per kilogram of body weight per day. Consumption of foods rich in carbohydrates should be limited. Patients should consume foods with the adequate quantity of phosphorus and potassium. Finally, they should have their sodium levels and fluid intake checked because sodium causes severe thirst that can lead to excessive fluid intake. As a result, the patient experiences swelling, shortness of breath and high blood pressure.Conclusion: Patients who undergo peritoneal dialysis must be checked regularly and pay special attention to their diets.
Źródło:
Progress in Health Sciences; 2015, 5, 2; 205-210
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the capillary pressure-saturation pore-size distribution parameter on geological carbon sequestration estimates
Autorzy:
Cheng, Ch.-L.
Perfect, E.
Yu, T. E.
Gragg, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/91981.pdf
Data publikacji:
2017
Wydawca:
Główny Instytut Górnictwa
Tematy:
geological carbon sequestration
numerical modeling
capillary pressure
saturation
cost estimate
geologiczna sekwestracja węgla
modelowanie numeryczne
ciśnienie kapilarne
nasycenie
szacowanie kosztów
Opis:
Cost estimates for geologic carbon sequestration (GCS) are vital for policy and decision makers evaluating carbon capture and storage strategies. Numerical models are often used in feasibility studies for the different stages of carbon injection and redistribution. Knowledge of the capillary pressure-saturation function for a selected storage rock unit is essential in applications used for simulating multiphase fluid flow and transport. However, the parameters describing these functions (e.g. the van Genuchten m pore size distribution parameter) are often not measured or neglected compared to other physical properties such as porosity and intrinsic permeability. In addition, the use of average instead of point estimates of m for numerical simulations of flow and transport can result in significant errors, especially in the case of coarse-grained sediments and fractured rocks. Such erroneous predictions can pose great risks and challenges to decision-making. We present a comparison of numerical simulation results based on average and point estimates of the van Genuchten m parameter for different porous media. Forward numerical simulations using the STOMP code were employed to illustrate the magnitudes of the differences in carbon sequestration predictions resulting from the use of height-averaged instead of point parameters. The model predictions were converted into cost estimates and the results indicate that varying m values in GCS modeling can cause cost differences of up to hundreds of millions dollars.
Źródło:
Journal of Sustainable Mining; 2017, 16, 3; 67-72
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zero waste: an innovation for less polluting emission processes, resource management practices and policies
Autorzy:
Ekanem, C.H.
Ekanem, H.E.
Eyenaka, F.D.
Isaiah, E.A.
Powiązania:
https://bibliotekanauki.pl/articles/11311.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
waste reduction
innovation
pollution
emission process
resource management
management practice
management policy
greenhouse gas
climate change
municipal solid waste
biodegradation
Opis:
The rising levels of greenhouse gases (GHGs) in the Earth‟s atmosphere have the potential to cause changes in our climate. Some of these emission increases can be traced directly to solid waste. Landfills are among the largest emitters of carbon dioxide and methane, the key GHGs. Thus, effective mitigation of these emissions through formalization of waste reduction into the waste management system to reduce land filling could provide environmental benefits of reducing the adverse impacts of climate change. This paper therefore proposes waste prevention and recycling-jointly referred to as waste reduction as better and most potent strategies for the management of solid waste and for reducing greenhouse gases and calls on both the government and private agencies to check or control the increasing pollution or abuse of the environment by enforcing compliance with the laid out Policies, Pronouncements, Regulations and enacted Legislation especially in the developing countries. The study concludes that by choosing to prevent waste and recycle, less waste will be generated, the need for landfill will be minimal, energy demand will decrease, fewer fossil fuels will be burned and less methane and carbon dioxide will be emitted to the atmosphere which helps to curb climate change.
Źródło:
International Letters of Natural Sciences; 2013, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protective role of curcumin in maximal electroshock induced seizures, memory impairment and neurotransmitters in rat brain
Autorzy:
Jithendra, Ch.
Murthy, T.E.G.K.
Upadyay, L.
Powiązania:
https://bibliotekanauki.pl/articles/3067.pdf
Data publikacji:
2008
Wydawca:
Instytut Medycyny Wsi
Źródło:
Journal of Pre-Clinical and Clinical Research; 2008, 02, 1
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burnout syndrome impacts on quality of life in nursing professionals: The contribution of perceived social support
Autorzy:
Fradelos, E.
Mpelegrinos, S.
Mparo, Ch.
Vassilopoulou, Ch.
Argyrou, P.
Tsironi, M.
Zyga, S.
Theofilou, P.
Powiązania:
https://bibliotekanauki.pl/articles/1916393.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
burnout
quality of life
social support
nursing staff
Opis:
Purpose: To examine the impacts of burnout that has in health-related quality of life (QOL) in nursing staff in Greece. The association of social support with burnout and QOL is also investigated. Materials and methods: Individuals working in Mental and General Hospitals in the broader area of Athens participated in this study (N.139). The measurement tools include a) the Maslach Burnout Inventory (MBI), b) the SF-36 Health Survey and c. the Multidimensional Scale of Perceived Social Support. Burnout and QOL are expected to be related to the evaluation of social environment. Results: The results indicated the impacts that burnout has on quality of life and the positive effect of social support for nursing professionals in the levels of burnout. Conclusions: There is an association between burnout, quality of life and social support. Social support and socio-demographic factors appear to affect the levels of burnout to Psychiatric and General Hospital.
Źródło:
Progress in Health Sciences; 2014, 4, 1; 102-109
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensor performance and cut-off wavelength tradeoffs of III-V focal plane arrays
Autorzy:
James, Jonathan Ch.
Haran, Terence L.
Lane, Sarah E.
Powiązania:
https://bibliotekanauki.pl/articles/2204205.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
infrared focal plane arrays
III-V semiconductor infrared detector technologies
infrared sensor performance modelling
infrared sensor design
mid-wave and longwave infrared sensors
Opis:
Infrared detector technologies engineered from III-V semiconductors such as strained-layer superlattice, quantum well infrared photodetectors, and quantum dot infrared photodetectors provide additional flexibility to engineer bandgap or spectral response cut-offs compared to the historical high-performance detector technology of mercury/cadmium/telluride. The choice of detector cut-off depends upon the sensing application for which the system engineer is attempting to maximize performance within an expected ensemble of operational scenarios that define objects or targets to be detected against specific environmental backgrounds and atmospheric conditions. Sensor performance is typically characterised via one or more metrics that can be modelled or measured experimentally. In this paper, the authors will explore the impact of detector cut-off wavelength with respect to different performance metrics such as noise equivalent temperature difference and expected target detection or identification ranges using analytical models developed for several representative sensing applications encompassing a variety of terrestrial atmospheric conditions in the mid-wave and long-wave infrared wavelength bands. The authors will also report on their review of recently published literature concerning the relationships between cut-off wavelength and the other detector performance characteristics such as quantum efficiency or dark current for a variety of detector technologies.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144570
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vision problems in children - a review
Autorzy:
Kourkouta, L.
Frantzana, E.
Iliadis, Ch.
Ouzounakis, P.
Monios, A.
Powiązania:
https://bibliotekanauki.pl/articles/1918528.pdf
Data publikacji:
2017-11-12
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
vision problems
children
Opis:
Introduction: A vision problem is a condition which involves not only visual difficulty but also blindness. Purpose: The purpose of this short review study is the early recognition of vision problems in children, the proper treatment as well as their prevention. Materials and methods: The material of the study has been recent articles on the subject that have been found mainly in the electronic database Medline, (HEAL-Link), with the following keywords: children, vision impairment, blindness, treatment, prevention. Review: A high risk group of individuals that frequently presents ophthalmic severe lesions leading to blindness consists of children with prenatal and perinatal adverse effects. Conclusions: Education gives the opportunity of co-existence between the blind and people who are able to see. This is the path to social inclusion of individuals with vision problems. Moreover, it is estimated these two groups would have more points in common than differences between them through this experience.
Źródło:
Progress in Health Sciences; 2017, 7(2); 80-84
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coherent Ferromagnetic Precipitate and Anomalies in the Heat Conduction and Thermopower of Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb Single Crystals
Autorzy:
Kattwinkel, A.
Kraus, E.
Kleeberg, Ch.
Groń, T.
Bärner, K.
Powiązania:
https://bibliotekanauki.pl/articles/1968922.pdf
Data publikacji:
1998-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
72.15.Eb
72.15.Jf
Opis:
The heat diffusivity D, the electrical resistivity ρ and the thermoelectric power S of tetragonal Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb single crystals with 0.02 < x < 0.12 have been measured in the temperature range of 90 K < T < 350 K and along different crystal axes. The heat conductivity κ and σ = 1/ρ are anisotropic along the crystal axes a, c with a ratio of 2:1. κ(T) , ρ(T) and S(T) show anomalies at the spin reorientation temperature T$\text{}_{Rm}$ of the matrix (M) Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb, but also at that of the coherent ferromagnetic precipitate (P) Mn$\text{}_{1.037}$Cr$\text{}_{0.11}$Sb, T$\text{}_{R_{p}}$ which is assigned to variations in the spin dependent scattering at the M /P interfaces via changes in the relative orientation of the magnetization vectors of matrix and precipitate (spin valve effect).
Źródło:
Acta Physica Polonica A; 1998, 93, 5-6; 745-762
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observation of Anisotropic Exchange in a Spin Ladder by ESR
Autorzy:
Čižmár, E.
Ozerov, M.
Krämer, K.
Rüegg, Ch.
Zvyagin, S.
Powiązania:
https://bibliotekanauki.pl/articles/1368577.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.30.-v
74.25.Ha
75.50.Gg
75.30.Gw
Opis:
We report on high resolution X-band electron spin resonance (ESR) spectroscopy studies of the spin-ladder material $(C_{5}H_{12}N)_{2}CuBr_{4}$. Our experiments provide a direct evidence for the presence of anisotropy in $(C_{5}H_{12}N)_{2}CuBr_{4}$ in contrast to a fully isotropic spin-ladder model employed for this system previously. Low-temperature angular dependence of ESR transitions is analyzed employing a simple spin-1/2 dimer model with the symmetric anisotropic exchange interaction.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 238-239
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple analytical model of asymmetric rolling
Prosty model analityczny asymetrycznego walcowania
Autorzy:
Halloumi, A.
Desrayaud, Ch.
Bacroix, B.
Rauch, E.
Montheillet, F.
Powiązania:
https://bibliotekanauki.pl/articles/355090.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modelowanie asymetryczne
walcowanie blachy
walcowanie asymetryczne
asymmetric rolling
upper bound method
uniform strain field method
Opis:
An original analytical method is proposed for modeling asymmetric rolling (ASR) of metal sheet. It is based on a uniform strain field depending on a single optimization parameter, viz. the entry velocity of the sheet. The shear and normal strains associated with an ASR pass are derived analytically. Moreover, it is shown that the entry velocity almost coincides with the outer linear velocity of the slower roll, as far as ASR is sufficiently asymmetric. In that case, closed form formulae are available for the main rolling parameters such as the overall power dissipated and the two rolling torques. These results can be straighforwardly used for practical applications.
Zaproponowano oryginalną metodę analityczną do modelowania asymetrycznego walcowania blachy. Model jest oparty na jednolitym obszarze odkształcenia zależnym od jednego parametru optymalizacji tj. prędkości wejścia arkusza. Naprężenia ścinanające i normalne związane z przebiegiem asymetrycznego walcowania wyprowadzone są analitycznie. Co więcej pokazano, że prędkość wejścia niemal zbiega się z zewnętrzną prędkością liniową wolniejszego walca, o ile asymetryczne walcowanie jest wystarczająco asymetryczne. W takim przypadku zamknięte równania są dostępne dla głównych parametrów walcowania takich jak całkowita moc rozpraszania i dwa momenty obrotowe walcowania. Wyniki te mogą być bezpośrednio wykorzystywane do zastosowań praktycznych.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 2; 425-435
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dose sensitivity enhancement on polymer gel with suspended gold particles
Autorzy:
Afonso, L. C.
Schöfer, F.
Hoeschen, Ch.
Caldas, L. V. E.
Powiązania:
https://bibliotekanauki.pl/articles/146797.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polymer gel
dose enhancement
radiation therapy
X-rays
Opis:
The presence of high Z material adjacent to soft tissue, when submitted to irradiation, enhances locally the absorbed dose in these soft tissues. Such an effect occurs due to the outscattering of photoelectrons from the high Z material. Polymer gel (PG) dosimeters were used to investigate this effect. Analytic calculations to estimate the dose enhancement were performed. Samples containing a polymer gel with 0.005 gAu/gPG and a pure polymer gel were irradiated using an X-ray beam produced by 150 kV, filtered with 4 mm Al and 5 mm Cu, which resulted in an approximately 20% greater absorbed dose in the samples with gold in comparison to those with the pure polymer gel. The analytic calculations resulted in a dose enhancement factor of approximately 30% for the gold concentration of 0.005 gAu/gPG.
Źródło:
Nukleonika; 2012, 57, 4; 467-472
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some physical properties of ginko nuts and kernels
Autorzy:
Ch'ng, P.E.
Abdullah, M.H.R.O.
Mathai, E.J.
Yunus, N.A.
Powiązania:
https://bibliotekanauki.pl/articles/24875.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Some data of the physical properties of ginkgo nuts at a moisture content of 45.53% (±2.07) (wet basis) and of their kernels at 60.13% (± 2.00) (wet basis) are presented in this paper. It consists of the estimation of the mean length, width, thickness, the geometric mean diameter, sphericity, aspect ratio, unit mass, surface area, volume, true density, bulk density, and porosity measures. The coefficient of static friction for nuts and kernels was determined by using plywood, glass, rubber, and galvanized steel sheet. The data are essential in the field of food engineering especially dealing with design and development of machines, and equipment for processing and handling agriculture products.
Źródło:
International Agrophysics; 2013, 27, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastic modulus for long-term evaluation of the tensile properties of polypropylene meshes in an in vivo rat model
Autorzy:
Przydacz, M.
Mahfouz, W.
Loutochin, O.
Ghezzi, Ch. E.
Carmel, M.
Corcos, J.
Powiązania:
https://bibliotekanauki.pl/articles/306894.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wytrzymałość
stała sprężystości
I-STOP
TVT-O
tensile properties
elastic modulus
mid-urethral slings
Opis:
Mid-urethral slings have become the gold standard treatment of stress urinary incontinence in women. Their tensile properties should be evaluated to measure how they wear off with time. Our objective was long-term assessment of the tensile properties of 2 synthetic tapes (TVT-O and I-STOP) after in vivo implantation in rats in terms of elastic modulus. Methods: Strips from both meshes were implanted in the abdominal wall of 30 rats, which were sacrificed at 5 time intervals. Their fibers were untangled to single components. Ultimate tensile strength (UTS), strain at UTS and the elastic modulus of each fiber type were measured. Results: I-STOP maintained UTS and strain over time, while TVT-O UTS and strain were significantly reduced. However, the elastic modulus of both tapes remained constant. Conclusions: Both meshes maintained their stiffness and elasticity with time. Elastic modulus could be an appropriate factor to predict long-term implantation outcomes. The clinical significance of such findings remains to be demonstrated by long-term analysis.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 4; 153-160
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Freeze-out and anisotropic flow in microscopic models
Autorzy:
Bravina, L.
Tywoniuk, K.
Zabrodin, E.
Burau, G.
Bleibel, J.
Fuchs, Ch.
Faessler, A.
Powiązania:
https://bibliotekanauki.pl/articles/148598.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ultrarelativistic heavy-ion collisions
elliptic flow
freeze-out of particles
Monte-Carlo quark-gluon string model
Opis:
It appears that in microscopic calculations hadrons are continuously emitted from the whole reaction volume. Different species decouple at different times. At RHIC energies significant fractions of both mesons and baryons are emitted from the surface region within the first two fm/c. The hadrons contribute differently to the formation and evolution of the anisotropic flow, which can be decomposed into three components: (i) flow created by hadrons emitted from the surface at the onset of the collision; (ii) flow produced by jets; (iii) hydrodynamic flow. Due to these features, e.g., the elliptic flows of mesons and baryons have different transverse momentum dependences. Comparison with experimental data reveals that centrality, rapidity, and transverse momentum dependences of the anisotropic flow are reproduced, at least qualitatively, by the microscopic models.
Źródło:
Nukleonika; 2006, 51,suppl.3; 3-6
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption of Thin ZnSe, ZnS and ZnS$\text{}_{x}$Se$\text{}_{1-x}$ Films under High Hydrostatic Pressure
Autorzy:
Griebl, E.
Schőtz, G.
Birzer, Ch.
Kerner, W.
Reisinger, T.
Hahn, B.
Gebhardt, W.
Powiązania:
https://bibliotekanauki.pl/articles/1934060.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.Ga
71.35.+z
Opis:
We present absorption measurements on free-standing ZnSe, ZnS and ZnS$\text{}_{x}$Se$\text{}_{1-x}$ films (d = 0.4...2 μm) under hydrostatic pressure up to 15 GPa. The refraction index n(λ,P) of ZnS and ZnSe in the transparent region up to 800 nm and the pressure shift of the E0 absorption edge of ZnSe and some ZnS$\text{}_{x}$Se$\text{}_{1-x}$-compositions was investigated at 293 K. At 2 K free exciton states near the E$\text{}_{0-}$ and E$\text{}_{0}$ + Δ$\text{}_{0}$-gap are visible in absorption. Increase in the Rydberg energy under pressure was found, which is explained with k • p-theory in the framework of the hydrogen model.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 995-999
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of multi-task on symptomatic patient affected by chronical vestibular disorders
Autorzy:
Regrain, E.
Regnault, P.
Kirtley, Ch.
Shamshirband, S.
Chays, A.
Boyer, F.-C.
Taiar, R.
Powiązania:
https://bibliotekanauki.pl/articles/307436.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
rehabilitacja
posturograf
zdolność
postawa człowieka
rehabilitation
posturography
ability
cognitive skills
vestibular disorders
anxiety posture balance
Opis:
Purpose: After a vestibular deficit some patients may be affected by chronical postural instability. The aim of this study was to identify the emotional and cognitive factors of these symptomatic patients. In particular, the double cognitive task and the anxiety disorder were identified by our patients. Through a retrospective study, 14 patients (65.4 ±18 years) participated in the experiment. Method: The experimentation consists in the study of the standing position of our patients through the aggregate of the trajectories of the center of pressure (COP) using a force plate device. With the aim of isolating the emotional and cognitive influence, this experimentation was defined in two conditions. In the first one, the patients were asked to maintain their balance without additional tasks. In the second one, the patients were submitted to an additional cognitive arithmetic task. The stabilogram surface, length (the forward and backward displacement distance during deviations in COP), lateral and the antero-posterior deviations were assessed. Results: Our results showed an increase of postural instability of patients affected by chronical vestibular disorders when submitted to the double task. The patients submitted to the cognitive task present a larger surface of activity in comparison with the free-task one (Wilcoxon test p-value equals p = 0.0453). In addition, their displacements inside this area are more important (p = 0.0338). The COP of all our patients deviated forward in the presence of the double task. Conclusion: The increase in instability during the double cognitive task could be explained by an additional stress caused by the desire to make a success of the cognitive task.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 3; 123-129
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of magnetic field irradiation on broccoli seed with accelerated aging
Wpływ działania pola magnetycznego na przyspieszenie starzenia się nasion brokuła
Autorzy:
Martinez, F.R.
Pacheco, A.D.
Aguilar, C.H.
Pardo, G.P.
Ortiz, E.M.
Powiązania:
https://bibliotekanauki.pl/articles/36962.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
magnetic field
irradiation
broccoli
seed
aging
physiological quality
biostimulation
Opis:
In order to improve the physiological quality of aged broccoli seed (Brassica oleracea var. Waltham29), in this study a variable magnetic field (VMF) of 3.6 mT, 60 Hz by 5min was used as pre-sowing treatment. The accelerated aging treatment was applied for 0, 48 and 72 h (AA0h, AA48h and AA72h) and then the VMF treatment, under a randomised complete block design with 4 replications of 30 seeds. For seeds aged for 72 h a final germination of 20% was obtained, whereas without magnetic stimulation it was null. However, the magnetic bio-stimulation in 48 h aged seeds was significantly negative, reducing the final germination by 45.83% compared to the treatment without magnetic field, while the VMF effects in unaged seed were zero. The variable magnetic field effects depended on the seed aging time, resulting in positive, negative and null outcomes (responses) in vigour variables.
W celu uzyskania poprawy właściwości fizjologicznych nasion brokuła (Brassica oleracea var. Waltham 29) poddanych przyspieszonemu starzeniu, zastosowano przedsiewne zmienne pole magnetyczne (VMF) o wartości 3,6 mT, 60 Hz przez 5 min. Proces przyspieszonego starzenia prowadzono przez 0, 48 and 72 h (AA0h, AA48h i AA72h), po czym nasiona poddawano działaniu VMF. Badanie prowadzono metodą bloków losowych w 4 powtórzeniach po 30 nasion. Przyspieszone starzenie przez 72 godziny spowodowało wzrost wskaźnika kiełkowania nasion o 20%, podczas gdy dla próby bez działania pola magnetycznego wynik był zerowy. W przypadku nasion poddanych starzeniu przez 48 godzin efekt stymulacji magnetycznej był negatywny, powodując spadek końcowego wskaźnika kiełkowania o 45,83% w porównaniu do wariantu bez pola magnetycznego. Dla nasion niepoddawanych starzeniu wpływ działania VMF był zerowy. Wpływ działania zmiennego pola magnetycznego na nasiona był uzależniony od czasu starzenia nasion, powodując pozytywne, negatywne lub zerowe zmiany w wartościach wskaźników ich wigoru.
Źródło:
Acta Agrophysica; 2014, 21, 1
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of silver nanoparticles on chicken health after infection with Campylobacter jejuni
Autorzy:
Chwalibog, A.
Vadalasetty, K. P.
Lauridsen, Ch.
Engberg, R. G.
Vadalasetty, R.
Kutwin, M.
Sawosz, E.
Powiązania:
https://bibliotekanauki.pl/articles/285844.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
silver nanoparticles
birds
broilers
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 52
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Standing seats for high-capacity trains
Stojące miejsca dla pociągów o dużej pojemności
Autorzy:
O’Neill, C.
Wake, M.
Fu, L.
Samuel-Horsfall, Ch.
Kor, E.
Vieira, J.
Dong -Fang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/374683.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transport capacity
seating
standing seats
Commuter
train interior
train design
pojemność transportowa
gniazdo
miejsca stojące
wnętrze pociągu
konstrukcja pociągu
Opis:
This paper details the design and potential implementation of standing seats in a commuter rail vehicle for the purposes of maximising capacity and revenue. The vehicle interior design is suited to the “Commuter Class” – a subset of travellers who travel primarily within the commuter belt and frequently utilise rail networks on a daily basis but require little additional space for luggage or peripherals. The concept delivers capacity increases in excess of 50% whilst still offering passengers a greater degree of personal space when compared with standing in aisles or gangways. The impact on vehicle stability and supporting intelligent systems are also discussed, delivering a unique design tailored specifically to meet the needs of the commuter class passenger.
Artykuł opisuje szczegółowo projekt stojących miejsc siedzących i potencjał ich wprowadzenia, w podmiejskim pojeździe kolejowym, w celu maksymalizacji wydajności i dochodów z przejazdu. Wnętrze takiego pojazdu jest dostosowane do ludzi przemieszczających się głównie w okręgu miejskim, podróżujących codziennie i wymagających odrobinę miejsca dla mniejszych bagaży czy urządzeń peryferyjnych. Koncepcja zapewnia wzrost pojemności o ponad 50%, dodatkowo oferując pasażerom jeszcze większy stopień osobistej przestrzeni w porównaniu ze staniem w korytarzach lub przejściach. Wpływ na stabilność pojazdu i wspieranie inteligentnych systemów są także uwzględnione, dostarczając tym samym unikalną konstrukcję dostosowaną specjalnie do potrzeb pasażera pociągów podmiejskich.
Źródło:
Transport Problems; 2014, T. 9, z. spec.; 89-100
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 36

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies