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Tytuł:
Strontium isotope dating of bivalve faunas from the Upper Miocene Cacela Formation, eastern Algarve, Portugal: evidence from Messinian bivalve fauna
Autorzy:
Studencka, B.
Zieliński, G.
Powiązania:
https://bibliotekanauki.pl/articles/2060317.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Bivalvia
Cacela Formation
87Sr/86Sr geochronology
Messinian
Portugal
Opis:
The study is focused on the determination of the geological age of bivalve fauna recovered from four fossiliferous sequences in the Cacela Formation of Algarve, southern Portugal, by means of the strontium isotope stratigraphy. Forty two analyses of bivalve samples from Barroquinha, Cabanas, the Cacela River and Lacem were performed. The estimated age based on the 87Sr/86Sr ratios in bivalve shell samples from the Cacela River (a reference section for the Cacela Formation) is 7.6 ± 0.4 Ma and is consistent with a late Tortonian age suggested by micropalaeontological data (calcareous nannofossils and planktonic foraminifers). Moreover, strontium isotopic data record that the oldest age of the bivalves of the Cacela Formation (Lacem site) is at least 8.9 ± 0.4 Ma whilst the age of about 7.0 ± 0.5 Ma can be inferred for bivalves from Barroquinha. An intriguing new datum comes, however, from the bivalve strontium isotopic data of the Cabanas section which records the estimated age of about 6.7 ± 0.4 Ma and, therefore, an early Messinian age. This is the first report of the early Messinian marine bivalve fauna in Portugal. Sixty one bivalve species have been recovered in the Messinian of Cabanas. Four of them: Pseudopythina macandrewi (P. Fischer), Coripia corbis (Philippi), Glossus (Glossus) humanus (Linnaeus) and Cyathodonta dollfusi (Cossmann et Peyrot) have previously not been reported from the Miocene of southern Portugal.
Źródło:
Geological Quarterly; 2013, 57, 4; 665--686
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected Aspects of Early Childhood Education and Primary Education in the Slovak Republic during the Period of Transformation of the Slovak Education System
Autorzy:
Kovalčíková, Iveta
Powiązania:
https://bibliotekanauki.pl/articles/507155.pdf
Data publikacji:
2012
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
Educational reform
early childhood education in SR
primary education in SR
state educational programme
school educational programme.
Opis:
The aim of this contribution is to assess selected aspects of the development of early childhood education and primary education in the Slovak Republic (SR) during the last twenty years in the context of the process of the transformation of the Slovak education system. Our aim is to emphasise: 1. The formation of a legislative framework for education reforms in SR; and 2. the development of a curriculum for early childhood and primary education. The contribution outlines various mechanisms for curricular transformation which are dependent on mutual configurations and the characteristic components of this difficult process. In the contribution we name the basic factors determining the conditions for the preparation, the implementation process and the assessment of results of education reform in early childhood and primary education. At the end of the article we offer suggestions which we feel could lead to the successful modification or further implementation of education reform in the Slovak Republic.
Źródło:
Journal of Preschool and Elementary School Education; 2012, 1; 81-106
2084-7998
Pojawia się w:
Journal of Preschool and Elementary School Education
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiostrontium uptake by lichen Hypogymnia physodes
Autorzy:
Pipíška, M.
Horník, M.
Kočiová, M.
Augustín, J.
Lesný, J.
Powiązania:
https://bibliotekanauki.pl/articles/146396.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
85Sr
Hypogymnia physodes
biosorption
kinetics
desorption
Opis:
Radiostrontium 85Sr sorption experiments were carried out at 4°C and 20°C using natural samples of the epiphytic foliose lichen Hypogymnia physodes. Thalli were incubated in water solutions containing 10 5 to 10 1 mol.l 1 SrCl2 for up to 24 h at the initial pH 5.5. Sorption equilibrium at 4°C and 20°C was observed within 1 hour and did not change within the next 24 hours. Sorption process can be described well by Freundlich adsorption isotherm in both linearised and non-linearised form, not by Langmuir adsorption isotherm. Inactivation of lichen biomass by formaldehyde or temperature pretreatment did not cause loss of biosorption activity. 85Sr biosorption was strongly pH dependent increased from negligible values at pH 2 up to nearly 100% uptake at pH 5.5. Bivalent cations Me2+ act as competitors for 85Sr biosorption with the competition effect increasing in the order Co < Mg < Ca < Cd < Ni < Ba < Zn < Cu for Me2+ concentration 0.01 mol.l 1. A number of displacing agents have been tested for their ability to release extracellular bound 85Sr2+ ions from Hypogymnia physodes. Displacing efficiency increases in the order: water <<< EDTA (acid) < NaHCO3 < Na2EDTA < oxalic acid < BaCl2 < MgCl2 < CaCl2 < SrCl2. Efficiency of strontium biosorption by different lichen taxa will reveal their role in fixation of radiostrontium contamination in biosphere.
Źródło:
Nukleonika; 2005, 50,suppl.1; 39-44
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ dawek osadu ściekowego oraz wapnowania na zawartość Li, Ti, Ba, Sr i As w roślinach testowych
The influence of sewage sludge doses and liming on the content of Li, Ti, Ba, Sr and As in the test plants biomass
Autorzy:
Malinowska, E.
Kalembasa, S.
Powiązania:
https://bibliotekanauki.pl/articles/401640.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
osad ściekowy
wapnowanie
Li
Ti
Ba
Sr
As
rośliny testowe
sewage sludge
liming
Sr and As
tested plants
Opis:
Celem pracy było określenie wpływu osadu ściekowego zastosowanego w dawce 10, 20 i 30% św.m. w stosunku do masy gleby w wazonie i wapnowania na ogólną zawartość Li, Ti, Ba, Sr i As roślinach testowych: życicy wielokwiatowej, słoneczniku i kukurydzy. Nawożenie osadem ściekowym istotnie zróżnicowało zawartość ogólną badanych pierwiastków w uprawianych roślinach. Największą bioakumulację Li i Sr stwierdzono w słoneczniku pastewnym, Ba i Ti w życicy wielokwiatowej, a As w kukurydzy. Wapnowanie gleby istotnie zmniejszyło ogólną zawartość badanych pierwiastków śladowych, za wyjątkiem Ba, średnio we wszystkich uprawianych roślinach. osad ściekowy, wapnowanie, Li, Ti, Ba, Sr, As, rośliny testowe.
The determination of influence of sewage sludge doses (10, 20 and 30% in the relation of soil dry mass) and liming on the content of Li, Ti, Ba, Sr and As in biomass of three tested plants (ryegrass, sunflower and maize) was the aim of this investigation. Fertilization with sewage sludge significantly differentiated the content of determinated elements in the biomass tested plants. The highest content of Li and Sr was determinated in the sunflower biomass, but Ba and Ti in ryegrass. Liming significantly in biomass of tested plants decreased the content of all determinated elements except the Ba.
Źródło:
Inżynieria Ekologiczna; 2011, 27; 110-119
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interlaboratory comparison of the determination of 137Cs and 90Sr in water, food and soil: preparation and characterization of test materials
Autorzy:
Fuks, L.
Polkowska-Motrenko, H.
Powiązania:
https://bibliotekanauki.pl/articles/148511.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
137Cs
50Sr
determination
food
soil
water
Opis:
Only reliable analytical results can serve as a basis of meaningful evaluation and protection of the environment against radioactive contaminants. So, laboratories dealing with the environmental radioactivity determinations should regularly demonstrate their ability to produce acceptable results. Since 2002, every two years organization of national interlaboratory comparisons (ILC) on the determination of different radionuclides in food and environmental samples is required by the Polish law. The aim of the paper is presentation how test materials applied in the Institute of Nuclear Chemistry and Technology (INCT, Warsaw, Poland) for the 2004 ILC on the determination of 137Cs and 90Sr in water, food and soil were prepared.
Źródło:
Nukleonika; 2006, 51,suppl.2; 27-31
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of different wire materials on WEDM performance of Bio-compatible material
Autorzy:
Pandey, Gaurav Kumar
Patel, Praveen Bhai
Kumar, Abhishek
Niranjan, Ramendra Singh
Katiyar, Vikas
Chandra, A. K
Powiązania:
https://bibliotekanauki.pl/articles/23966616.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
WEDM
MRR
SR
Ti-6Al-4V
Opis:
The present experimental investigation aims to analyse the effect of various machining parameters, such as pulse peak current (Ion), pulse on time (Ton), pulse off time (Toff) and spark voltage (SV) on the surface roughness (SR) and material removal rate(MRR) by using continuous traveling of both wire electrode (i.e. brass wire and zinc-coated brass wire). The present work also analyses the effect of types of wires, such as brass wire and zinc-coated brass wire used during machining of Titanium alloy (Ti-6Al-4V) on Surface roughness (SR) and material removal rate (MRR). This work studies the correlation between various response parameter such SR and MRR by using same machining parameter by for both wires.
Źródło:
Production Engineering Archives; 2022, 28, 1; 50--55
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modifications of Computational Formulae of Decibel Algebra Applied in Acoustics
Autorzy:
Batko, W.
Powiązania:
https://bibliotekanauki.pl/articles/1504169.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.50.Rq
43.50.Sr
43.50.Gf
Opis:
The analysis of description rules of acoustic effects in decibel algebra was performed in the presented paper. The attention was drawn to the incompatibility between mappings examined on the decibel values set and axioms of the real numbers theory. The consequences of this fact as well as the needs of the necessary modifications of relations describing a cooperation of sound levels from various sources (expressed by adding, subtracting or multiplying) were discussed. The necessary corrections were proposed. The analysis of differences was performed in relation to generally applied rules of processing the decibel measurement results in acoustic examinations.
Źródło:
Acta Physica Polonica A; 2011, 119, 6A; 909-912
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The vīthī, lāsya and nāṭikā, and the daśarūpa List in the Nāṭyaśāstra
Autorzy:
Tieken, Herman
Powiązania:
https://bibliotekanauki.pl/articles/35059849.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN
Tematy:
Daśarūpa
vīthī
lāsya
uparūpaka
nātikā
Nātyaśāstra
Daśarūpaka
Śr̥ ṅgāraprakāśa
Opis:
This article aims to show that the term vīthī, the tenth in the daśarūpa list of plays found in the early dramatic treatises, does not refer to a play but to a number of small-scale dramatic scenes. As such, the vīthī is an exception in the list, which otherwise is made up of fully-fledged plays. However, as a collection of scenes, it does form a group with numbers 8 and 9, the prahasana and bhāṇa, each of which has two lives, namely as complete plays and as scenes within plays. The vīthī plays we have are all late reconstructions based on the general characteristics mentioned in the dramatic treatises. In some of the treatises the daśarūpa list is extended by the lāsya, another term designating a number of minor dramatic scenes which involve singing and dancing. It will be argued that the lāsya – as well as another set of minor dramatic types, the uparūpakas – came to be included into the dramatic theory through its occurrence within the nāṭikā, a type of play that is presented as a mixture of the nāṭaka and prakaraṇa, numbers 1 and 2 in the daśarūpa list, and was consequently not counted separately. It will furthermore be shown that the daśarūpa list consists of three clearly distinct groups, namely of 1–2 (nāṭaka, prakaraṇa and supernumerary nāṭikā) and 8–10 (prahasana, bhāṇa and vīthī), separated by a group of five types of play (3–7) dealing with battle and its aftermath. Of the latter five no early, classical examples have come down to us; apparently their topics have fallen outside the sphere of interest of the kāvya literary tradition.
Źródło:
Acta Asiatica Varsoviensia; 2023, 36; 265-297
0860-6102
2449-8653
Pojawia się w:
Acta Asiatica Varsoviensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nd and Sr isotopic evidence for provenance of clastic material of the Upper Triassic rocks of Silesia, Poland
Autorzy:
Konieczna, N.
Belka, Z.
Dopieralska, J.
Powiązania:
https://bibliotekanauki.pl/articles/191300.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Nd isotopes
Sr isotopes
clastics
provenance
Upper Triassic
Polska
Opis:
Nd and Sr isotope data were used to characterize the sources of the Upper Triassic (Keuper) siliciclastic rocks of Silesia in southern Poland. This continental succession, consisting predominantly of fine-grained mud- stones and siltstones, yields a remarkably uniform Nd isotopic composition. Nd model ages T2DM vary from 1.56 to 1.69 Ga and εNd values are in the range from –8.9 to –11.2, documenting old crust contribution in the provenance. In contrast, the Sr isotopic composition (87Sr/86Sr) of the clastics exhibits a relatively large variation from 0.710 to 0.723. The isotopic compositions indicate that the southern part of the Germanic Basin in Silesia was supplied with clastic material from the Bohemian Massif. The axis of the drainage area must have crossed from SW to NE the Saxothuringian units of the East Sudetes and most probably also the area of the Tepla–Barrandian Unit. There is no indication of any sediment transport from the Moravo-Silesian Belt and the Fore-Sudetic Block. It seems, that the Palaeozoic rocks of the latter domain must have been buried completely during Late Triassic times.
Źródło:
Annales Societatis Geologorum Poloniae; 2015, 85, 4; 675-684
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BENEFIT, CHAMPS i ETOMS: porównanie wyników leczenia interferonem beta chorych na klinicznie izolowane zespoły sugerujące stwardnienie rozsiane
BENEFIT, CHAMPS and ETOMS: comparison of outcome of interferon-beta treatment in patients with clinically isolated sclerosis multiplex-like syndromes
Autorzy:
Cendrowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1061292.pdf
Data publikacji:
2006
Wydawca:
Medical Communications
Tematy:
CDMS
CIS
conversion
interferon beta
konwersja
KIZ
KP SR
Opis:
The 2-year outcomes of three non-parallel, prospective, placebo-controlled studies (BENEFIT, CHAMPS, ETOMS) have shown that IFN beta-lb s.c. (Betaferon®), IFN beta-la i.m. (Avonex®) and IFN beta-la s.c. (RebiP) similarly prevented conversion of clinically isolated syndromes (CIS) into clinically definite multiple sclerosis (CDMS). Smaller proportions of CIS patients in the Betaferon®, Avonex® and RebiP groups converted to CDMS as compared with fractions in the placebo groups (28%, 21%, 34% vs. 45%, 35%, 45%); p from 0.047 to 0.00007. The mean number of days to CDMS development was prolonged by three products of IFN beta (363, 375, 569 days), but not by placebo (255, 309, 252 days); p between <0.05 and 0.00007. The mean or median number of new T2-related brain lesions was more strongly reduced in all studies by the verum than by placebo (1.0 vs. 2.0,2.1 vs. 5.0,2.0 vs. 3.0); the differences were significant. The mean or median number of new, enhancing lesions was also significantly reduced in the BENEFIT and in the CHAMPS studies, but not in the
Dwuletnie wyniki trzech nierównoległych, prospektywnych, kontrolowanych przez placebo badań (BENEFIT, CHAMPS, ETOMS) dowiodły, że IFN beta-lb s.c. (Betaferon®), IFNbeta-la i.m. (Avonex®) i IFN beta-la s.c. (Rebif®) w podobnym stopniu zapobiegły konwersji klinicznie izolowanych zespołów (KIZ) w klinicznie pewne stwardnienie rozsiane (KP SR). Mniejsze proporcje chorych z KIZ w grupach Betaferon u®, Avonexu® i Rebifu® przekształciły się w KP SR w porównaniu z frakcją w grupach placebo (28%, 21%, 34% vs 45%, 35%, 45%); p od 0,047 do 0,00007. Średnia liczba dni do wystąpienia KP SR została wydłużona przez trzy produkty IFN beta (363, 375, 569 dni), lecz nie przez placebo (255, 309, 252 dni); p między <0,05 i 0,00007. Verum silniej niż placebo zmniejszyło średnią lub medianę liczby nowych, T2-zależnych uszkodzeń mózgu (1,0 vs 2,0; 2,1 vs 5,0; 2,0 vs 3,0); p = różnice istotne. Średnia lub mediana wzmacniających się po kontraście uszkodzeń również uległa istotnej redukcji w BENEFIT, CHAMPS, ale nie w ETOMS. Pośrednie porównanie dowiodło, że trzy produkty IFN beta częściowo zapobiegły lub opóźniły konwersję KIZ w KP SR i zahamowały ewolucję nowych uszkodzeń mózgu na obrazach rezonansu magnetycznego.
Źródło:
Aktualności Neurologiczne; 2006, 6, 3; 195-199
1641-9227
2451-0696
Pojawia się w:
Aktualności Neurologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sound Pressure Level Analysis of Commercials and Regular Programs
Autorzy:
Malecki, P.
Wiciak, J.
Powiązania:
https://bibliotekanauki.pl/articles/1537508.pdf
Data publikacji:
2010-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.50.Sr
43.50.Rq
43.50.Yw
Opis:
Popularity of television and multitude of commercials during the TV broadcast lead to the analysis of its sound levels. Costs of commercials' time cause producers to make commercials much louder than a regular TV program. The article shows results of commercials and regular program sound level (RMS and FFT) analysis and the difference in sound levels of commercials compared to a regular program. The analysis also shows the difference between public and private TV. The authors of the article suggest a solution to this problem and its effects.
Źródło:
Acta Physica Polonica A; 2010, 118, 1; 118-122
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-frame Image Super-resolution Reconstruction Using Multi-grained Cascade Forest
Autorzy:
Wang, Yaming
Luo, Zhikang
Huang, Wenqing
Powiązania:
https://bibliotekanauki.pl/articles/226035.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multi-frame image SR
image registration
SRMCF
image fusion
Opis:
Super-resolution image reconstruction utilizes two algorithms, where one is for single-frame image reconstruction, and the other is for multi-frame image reconstruction. Singleframe image reconstruction generally takes the first degradation and is followed by reconstruction, which essentially creates a problem of insufficient characterization. Multi-frame images provide additional information for image reconstruction relative to single frame images due to the slight differences between sequential frames. However, the existing super-resolution algorithm for multi-frame images do not take advantage of this key factor, either because of loose structure and complexity, or because the individual frames are restored poorly. This paper proposes a new SR reconstruction algorithm for images using Multi-grained Cascade Forest. Multi-frame image reconstruction is processed sequentially. Firstly, the image registration algorithm uses a convolutional neural network to register low-resolution image sequences, and then the images are reconstructed after registration by the Multi-grained Cascade Forest reconstruction algorithm. Finally, the reconstructed images are fused. The optimal algorithm is selected for each step to get the most out of the details and tightly connect the internal logic of each sequential step. This novel approach proposed in this paper, in which the depth of the cascade forest is procedurally generated for recovered images, rather than being a constant. After training each layer, the recovered image is automatically evaluated, and new layers are constructed for training until an optimal restored image is obtained. Experiments show that this method improves the quality of image reconstruction while preserving the details of the image.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 687-692
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Creep Resistance of Mg-Al-Ca-Sr Alloys
Mikrostruktura i odporność na pełzanie stopów magnezu Mg-Al-Ca-Sr
Autorzy:
Rzychoń, T.
Adamczyk-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/355876.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast magnesium alloys
Mg-Al-Ca-Sr alloys
microstructure
mechanical properties
odlewnicze stopy magnezu
stopy Mg-Al-Ca-Sr
mikrostruktura
właściwości mechaniczne
Opis:
Microstructure and creep properties of cast Mg-Al-Ca-Sr alloys have been investigated. The microstructure was characterized using light microscopy, scanning and transmission electron microscopy. Phase identification was made by EBSD technique and by SAED analysis. The measurement of volume fraction of intermetallic phases was performed using quantitative metallography. Creep tests were performed at 180°C and at applied stress between 45 and 90 MPa. Microstructure of tested alloys composed of α-Mg grains and intermetallic compounds in the interdendritic regions. It was found that the addition of calcium and strontium improves creep resistance at 180°C.
W artykule przedstawiono wyniki badań mikrostruktury i odporności na pełzanie odlewniczych stopów magnezu Mg-Al-Ca-Sr. Mikrostrukturę badano metodami mikroskopii świetlnej, skaningowej i elektronowej transmisyjnej. Identyfikacji faz dokonano metodami EBSD i dyfrakcji elektronów (TEM). Pomiar udziałów objętościowych faz dokonano za pomocą metalografii ilościowej. Badania odporności na pełzanie przeprowadzono w temperaturze 180°C przez 100 h. Mikrostruktura badanych stopów składa się z ziaren roztworu stałego α-Mg i faz międzymetalicznych w przestrzeniach międzydendrytycznych. Stwierdzono, że dodatek wapnia i strontu poprawia odporność na pełzanie w temperaturze 180°C.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 1; 329-334
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of a Novel Audio Network Protocol
Autorzy:
Lee, J.
Jeon, H.
Choi, P.
Kwon, S.
Lee, S.
Powiązania:
https://bibliotekanauki.pl/articles/178062.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
audio mixer
AoIP
audio over internet protocol
DANTE
SR System
Opis:
Recently, the rapid advancement of the IT industry has resulted in significant changes in audio-system configurations; particularly, the audio over internet protocol (AoIP) network-based audio-transmission technology has received favourable evaluations in this field. Applying the AoIP in a certain section of the multiple-cable zone is advantageous because the installation cost is lower than that for the existing systems, and the original sound is transmitted without any distortion. The existing AoIP-based technology, however, cannot control the audio-signal characteristics of every device and can only transmit multiple audio signals through a network. In this paper, the proposed Audio Network & Control Hierarchy Over peer-to-peer (Anchor) system enables all audio equipment to send and receive signals via a data network, and the receiving device can mix the signals of different IPs. Accordingly, it was possible to improve the system-application flexibility by simplifying the audio-system configuration. The research results confirmed that the received audio signals from different IPs were received, mixed, and output without errors. It is expected that Anchor will become a standard for audio-network protocols.
Źródło:
Archives of Acoustics; 2018, 43, 4; 637-645
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Semisolid and Strontium Addition on Dry Sliding Wear Behavior of Hypoeutectic Al-Si Alloy
Autorzy:
Anas, Noraz Man
Zakaria, S. A.
Anasyida, A. S.
Mohamad, Hasmaliza
Dhindaw, Brij Kumar
Powiązania:
https://bibliotekanauki.pl/articles/2203750.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hypoeutectic Al-Si alloy
semisolid
cooling slope
Sr
wear resistance
Opis:
The study aims to investigate the effect of semisolid structure and strontium (Sr) addition on the wear behavior of hypoeutectic Al-Si alloy. Semisolid hypoeutectic Al-Si alloy was prepared using cooling slope casting with addition of 0 to 0.93 wt.% Sr. Microstructural study was done using an optical microscope. Vicker microhardness and pin on disc tribometer were used for microhardness and wear testing. When compared to conventional casting, the microhardness of the semisolid hypoeutectic Al-Si alloy improved by 9.8%. Sr addition at 0.43 wt.% resulted in a refined eutectic structure with a 17% increase in hardness over conventional casting. The globular structure α-Al formed during semisolid casting reduced porosity, and the addition of Sr refined the eutectic silicon into a fine fibrous structure that is tightly bound with the Al matrix. These are the primary factors that contribute to the high wear resistance in modified-Sr semisolid alloys.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 307--317
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of MPLS Tunnel Service L2TP-VPN Optimization Concept with Traffic Engineering Method for Looping-Protection Service Analysis
Autorzy:
Silalahi, Lukman Medriavin
Budiyanto, Setiyo
Simanjuntak, Imelda Uli Vistalina
Effendi, Rukhi Ali
Fernando
Rochendi, Agus Dendi
Kampono, Irfan
Powiązania:
https://bibliotekanauki.pl/articles/2201247.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MPLS
SR-TE
Looping Protection
L2-VPN
VPN
QoS
Opis:
This research began when observations were made on any-to-any-connection services that require QoS (Quality of Service) and tunnel measurements. Tunnel is a technique to interconnect between local networks that are separated through a public network. Research questions found looping caused by traffic issues when sending data in the MPLS service layer-2 tunneling service. Furthermore, this research hypothesis proposes optimizing QoS performance in the application of the SR-TE (Segment Routing-Traffic Engineering) method in the MPLS (Multi-Protocol Label Switching) network and analyzing traffic based on MAC addresses using the looping-protection method. This research contributes to optimizing the MPLS network and is a recommended solution for simplifying control-plane operation, especially the SR-TE method and looping-protection in the L2- VPN MPLS service. The purpose of this study is to analyze the performance of MPLS networks, as well as analyze the application of L2-VPN (Layer 2 Virtual Private Network) MPLS networks. The targeted TKT (Technology Readiness Level) is 3rd-Level, which is an analytical and experimental proof of the MPLS tunnel network model on Layer-2 VPN services. The results of the research concluded that testing the SR-TE method is a solution to simplify the process of labeling data traffic that is global labelling, then the looping-protection method is a solution to eliminate looping indications. The QoS obtained has also shown an "excellent" category based on TIPHON standards.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 115--120
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation monitoring of agricultural soils of the Volyn region in Ukraine
Autorzy:
Hromyk, O.
Ilyin, L.
Grygus, I.
Korotun, S.
Ilyina, O.
Zukow, W.
Powiązania:
https://bibliotekanauki.pl/articles/2087331.pdf
Data publikacji:
2020
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
radionuclides
90SR
137CS
radioactive contamination
soils
monitoring
settlement
Opis:
Background. The development of effective environmental management programs requires an appropriate assessment of the current state of the environment and contributes to anticipating future changes in the state of the environment. Obtaining such information is one of the main objectives of monitoring the environment, which is subject to anthropogenic stress, including radiological contamination. The distribution of radionuclides and their ability to migrate in ecological chains and concentration in individual parts requires special control in contaminated areas. Objective. The purpose of the study was to analyze the content of radionuclides ( 137Cs and 90Sr) in soils near the settlements of the zone of radioactive contamination of the Volyn region and their spatial differentiation. Priority is given to agricultural lands, soils, crop products, which necessitates the organization of targeted monitoring of the agro industrial complex Material and methods. Radioactivity from 137Cs and 90Sr in the soil originating in the Volyn region was studied from 1996 to 2018. Radiation control was carried out on the area of 59852 ha (arable land - 38897 ha, meadows and pastures – 20955 ha). Results. A significant part of the study area has elevated levels of radioactive contamination. The density of radionuclide contamination of agricultural soils in the settlements of the region has been determined. Density of pollution of all surveyed agricultural lands 137Cs ranges from 0.01 to 2.826 Ci/km2, and 90Sr from 0.01 to 0.048 Ci/km2. Conclusions. The radiological situation in the Volyn region (Ukraine) remains stable. There are slight fluctuations of 137Cs and 90Sr, which is due to changes in weather conditions, which leads to an increase or decrease in groundwater and as a consequence - the migration of radionuclides. The most polluted were the soils of administrative districts of Manevychi and Liubeshiv.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2020, 71, 4; 377-382
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roślinność bentosowa jako indykator stanu środowiska Morza Bałtyckiego
Macrophytobenthos as an indicator of the environmental status of the Baltic Sea
Autorzy:
Saniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/366610.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
makrofitobentos
indykator
90Sr
Morze Bałtyckie
Marine macroalgae
indicator
Baltic Sea
Opis:
Roślinność denna może być wykorzystana do oceny stanu ekologicznego środowiska morskiego poprzez analizy gatunkowe, analizy biomasy oraz określenie wskaźnika stanu makrofitów opartego na stosunku biomasy taksonów pozytywnych do biomasy taksonów negatywnych. Makroglony ze względu na swoją zdolność do bioakumulacji zanieczyszczeń mogą być również wykorzystane do oceny stanu środowiska pod kątem skażeń substancjami niebezpiecznymi. Przykładem może być wykorzystanie fitobentosu do oceny poziomu skażenia wody substancjami radioaktywnymi. Najwyższe średnie aktywności 90Sr pomierzono w tkankach roślin w akwenach, w których stan ekologiczny określony na podstawie makrofitobentosu był najsłabszy.
Phytobenthos can be used to assess the ecological status of the marine environment by the analyses of species, the analyses of biomass and the determination of the macrophyte index based on the ratio of the biomass in negative and positive species. On account of their ability to bioaccumulate, macroalgae can also be used to assess the contamination of the sea by hazardous substances. Phytobenthos is used to assess the level of the radioactive substances in water. The highest average activity of 90Sr was measured in plant tissues in the areas where the ecological status determined using macrophytobentos was by far the poorest.
Źródło:
Polish Hyperbaric Research; 2013, 1(42); 83-101
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accumulation properties of Norway spruce (Picea abies) for different radionuclides
Autorzy:
Tomankiewicz, E.
Mietelski, J.
Gaca, P.
Błażej, S.
Powiązania:
https://bibliotekanauki.pl/articles/148612.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
137Cs
50Sr
thorium
spruce tree
Tatra Mts.
aggregation coefficients
Opis:
The paper presents results for the 137Cs, 90Sr, 40K activity concentrations and 228Th/232Th, 230Th/232Th activity ratios in several samples needles from two Norway spruce (Picea abies) trees and two soil samples collected in the Tatra Mountains (Poland) area. Activities for artificial 137Cs and 90Sr show moderate values. Statistically different values were found between the mean concentration of 90Sr and 137Cs in current (C) and two years old (C+2) needles of the first tree, whereas for potassium no significant difference was observed. For the second, fallen tree, no significant difference between the mean activity concentration in needles for C+1 and C+2 was found for each radionuclide, but much lower levels of 137Cs contamination were observed. Observed values of the aggregation coefficients for 137Cs and 90Sr are presented.
Źródło:
Nukleonika; 2006, 51,suppl.2; 59-67
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of SR - FTIR microspectroscopy for a preliminary biochemical study of the rat hippocampal formation tissue in case of pilocarpine induced epilepsy and neutroprotection with FK- 506
Autorzy:
Dudała, J.
Janeczko, K.
Setkowicz, Z.
Eichert, D.
Chwiej, J.
Powiązania:
https://bibliotekanauki.pl/articles/146884.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
pilocarpine-induced epilepsy
FK-506 (tacrolimus)
SR-FTIR microspectroscopy
biochemical analysis
Opis:
The main aim of the work was the biochemical analysis of the hippocampal formation tissue in the case of epileptic rats treated with the neuroprotective agent FK-506. Three groups of animals were compared: rats with pilocarpine induced seizures treated and non-treated with tacrolimus as well as naive controls. Synchrotron radiation Fourier transform infrared (SR-FTIR) microspectroscopy was used for the biomolecular analysis of studied samples. The measurements were carried out at SISSI beamline of ELETTRA. A Bruker IFS 66v/S interferometer coupled to a Bruker Hyperion 2000 microscope was used. The tissue samples were analyzed in transmission mode with a beam defined by a small aperture and spatial resolution steps of 10 mi m which allowed us to probe the selected cross-line of the sample at cellular resolution. The obtained results enabled to compare the distributions of proteins and lipids in the three hippocampal cellular layers, i.e. in molecular, multiform and granular layers. For epileptic animals both treated and non-treated with FK-506, the tendency for increase of the ratio of the absorbance at around 1548 and 1658 cm-1 (amide II/amide I ratio) was observed, however only for the multiform layer these changes were statistically significant. Similar relation was noticed in case of the ratio of the absorbance at around 1631 and 1658 cm-1. The mentioned results may suggest conformational changes of proteins in the direction of beta-sheet secondary structure. Additionally, a statistically significant increase in the lipid massif and a decrease of the ratio of absorbance at around 2921 and 2958 cm-1 were observed for epileptic animals treated with tacrolimus comparing to the control group.
Źródło:
Nukleonika; 2012, 57, 4; 615-619
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Verification of Selected Solutions for Crack Detection
Autorzy:
Kurnyta, A.
Reymer, P.
Powiązania:
https://bibliotekanauki.pl/articles/97955.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
fatigue crack
crack detection
DMI SR2
polymer gage
ladder sensor
Opis:
Throughout its service life an aircraft is subjected to varying loads. Because of those periodically appearing stresses, undesirable and irreversible changes in structure may occur. As a consequence, cracks are formed, which reduce aircraft structural strength, significantly affecting structural integrity. For that reason, intensive research works are carried out around the world to develop innovative and reliable methods for detection of cracks initiation and propagation. This paper presents two methods of crack detection. One of them uses wireless polymer gages for determining deformation in a test region. The other one uses electrical, resistive ladder sensors for detection of cracks and their length determination.
Źródło:
Fatigue of Aircraft Structures; 2012, 4; 58-63
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie pakietu Autodesk Land Solutions do opracowania projektów realizowanych techniką RTK GPS
Application of the Autodesk Land Solutions software package to elaboration of RTK GPS projects
Autorzy:
Uznański, A.
Powiązania:
https://bibliotekanauki.pl/articles/262265.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
real time kinematic surveys
software SR530 GPS receiver
Autodesk Land Solutions
Opis:
W pracy przedstawiono wybrane możliwości zastosowania pomiarów RTK GPS z wykorzystaniem odbiorników SR530 firmy Leica z opcjonalnym oprogramowaniem inżynierskim do realizacji projektów geodezyjnych. Podano informacje na temat dostępnych opcji oprogramowania firmowego oraz możliwości odbiorników SR530 w zakresie współpracy z pakietem Autodesk Land Solutions w efektywniejszym opracowaniu danych geodezyjnych. Zamieszczono krótki opis aplikacji wchodzących w skład tego pakietu programów, akcentując możliwość współpracy w geodezyjnym opracowaniu danych dostarczonych z pomiarów techniką RTK GPS oraz w przygotowaniu danych do realizacji tą techniką.
The paper presents selected possibilities of use of the Leica SR530 GPS receivers, furnished with optional engineering application programs, in realization of surveying tasks. Actually available firmware options are described and possibilities of cooperation of the SR530 receivers with the Autodesk Land Solutions package in effective processing of survey data are discussed. Package applications are presented in short, with stress on cooperation in processing of RTK GPS data, and on preparation of data for setting-out with this technique.
Źródło:
Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2005, 11, 2; 357-363
1234-6608
Pojawia się w:
Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Sr and Mg Alloying Additions on the Bonding Between Matrix and Reinforcing Particles in the AlSi7Mg/SiC-Cg Hybrid Composite
Autorzy:
Dolata, A. J.
Dyzia, M.
Boczkal, S.
Powiązania:
https://bibliotekanauki.pl/articles/356551.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hybrid aluminium composites
Mg and Sr modification
solidification
structure
permanent mould casting
Opis:
The aim of the work was to perform adequate selection of the phase composition of the composite designated for permanent - mould casting air compressor pistons. The hybrid composites based on AlSi7Mg matrix alloy reinforced with mixture of silicon carbide (SiC) and glassy carbon (Cg) particles were fabricated by the stir casting method. It has been shown that the proper selection of chemical composition of matrix alloy and its modification by used magnesium and strontium additions gives possibility to obtain both the advantageous casting properties of composite suspensions as well as good bonding between particles reinforcements and matrix.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 651-656
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania stateczności i kierowalności pojazdów przy pomocy robota sterującego SR60 firmy ABDynamics
Tests of vehicles’ stability and steerability with ABDynamics SR60 steering robot
Autorzy:
Grubek, M.
Powiązania:
https://bibliotekanauki.pl/articles/348385.pdf
Data publikacji:
2014
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
stateczność
kierowalność
pojazdy
roboty sterujące
SR60
stability
steerability
vehicles
steering robots
Opis:
Stateczność i kierowalność to najważniejsze z właściwości pojazdów dotyczących bezpieczeństwa czynnego. Zwykle dla określenia stateczności pojazdu wykonywana jest próba podwójnej zmiany pasa ruchu, natomiast dla określenia kierowalności wykonywane są próby polegające na zadawaniu różnych wymuszeń na kole kierowniczym i badaniu reakcji pojazdu. Aby wyeliminować błędy czynnika ludzkiego oraz poprawić powtarzalność prób, zasadnym jest zastąpienie kierowcy automatycznym układem wykonującym czynności manipulacyjne za człowieka. W niniejszym artykule przedstawiono robota sterującego SR60, jego budowę, funkcję oraz wykorzystanie w badaniach stateczności i kierowalności pojazdów.
Stability and steerability are the most important properties of a vehicle’s active safety. Usually, to determine stability, a double lane change is carried out. To determine steerability, various tests are performed, which consist of imposing different extortions on the steering wheel and testing the vehicle’s response. To eliminate human error and improve tests repeatability, it is recommended that an automatic system substitutes for the driver. This paper presents the SR60 steering robot, its structure and function as well as its use in testing a vehicle’s stability and steerability.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2014, 2; 113-123
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
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