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Tytuł:
A new method for a preliminary definition of a high–performance rudder for tuna purse seiners
Autorzy:
Martínez–López, A.
Munín–Doce, A.
Powiązania:
https://bibliotekanauki.pl/articles/259135.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
rudder optimisation
vessel manoeuvrability
tuna vessel design
Opis:
The aim of this paper is to provide a simple method for the definition of a rudder for tuna purse seiners. The model achieved by the application of this method ensures the manoeuvrability of initial turning, course keeping and yaw checking. For this, the results obtained by other authors, through rudder tests and manoeuvrability tests of fishing vessels have been integrated with the recommendations of the International Normative. Finally, in the paper the method is applied to the case of a tuna vessel, providing a rudder model which could be optimised with CFD (Computer Fluid Dynamics) in further tests. The method proposed can be applied to other vessels whose main dimensions are met.
Źródło:
Polish Maritime Research; 2012, 3; 26-35
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Projekt jako kryterium demarkacji
Design as a Criterion of Demarcation
Autorzy:
López, Mario A.
Powiązania:
https://bibliotekanauki.pl/articles/553253.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Instytut Filozofii
Tematy:
projekt eutaksjologiczny
teleologia
teleonomia
falsyfikowalność
epistemiczne uzasadnianie
przekonanie podstawowe
ontologiczne zaangażowanie
naturalizm ontologiczny
naturalizm metodologiczny
eutaxiological design
teleology
teleonomy
falsifiability
epistemic justification
basic belief
ontological commitment
ontological naturalism
methodological naturalism
Opis:
Naturalizm metodologiczny, chociaż w sposób niejawny za sprawą wykluczenia odwołań do celowości, funkcjonuje całkowicie w zgodzie z założeniami naturalizmu ontologicznego i dlatego operuje jedynie w sferze tego, co empiryczne i naturalistyczne. Bardziej neutralna epistemologia w mniejszym stopniu opiera się na założeniach, pozwalając nauce na rozkwit bez ograniczeń narzucanych przez takie filozoficzne zobowiązanie. Zadanie oddzielenia nauki od naturalizmu metodologicznego wymaga porzucenia idei, że struktura wiedzy, czy też uzasadnione przekonanie, nie potrzebuje żadnego epistemicznego fundamentu i że uzasadnianie inferencyjne ma w nauce zdecydowanie wyższy status poznawczy niż uzasadnianie nieinferencyjne. W moim przekonaniu odwieczny problem nauki, a tym samym kryterium demarkacji, wiąże się z dwoma kwestiami. Po pierwsze, zakłada się, że tylko wiedza zdobywana inferencyjnie jest prawdziwie uzasadniona i, po drugie, że teorie muszą być — co najmniej — teoretycznie falsyfikowalne. W tym artykule zamierzam zaproponować kryterium demarkacji nauki pełniące praktyczną i heurystyczną rolę jako bodziec rozwoju nauki. Moja propozycja nie zakłada odgórnie mocy przyczynowej przypadku i konieczności, lecz zmusza naukowca do uznania ontologicznych cech przyrody i przyjęcia, że kwestia przyczynowości jest całkowicie otwarta. W ten sposób propozycja ta unika problemów, jakie na naukę nieubłaganie sprowadza naturalizm ontologiczny, a także jego wierny sprzymierzeniec — naturalizm metodologiczny.
Methodological naturalism, though inexplicit in the denial of purpose, operates exclusively under the tenets of ontological naturalism and, therefore, proceeds only by way of the empirical and naturalistic. A more neutral epistemology is less presumptive and would allow science to flourish without the strictures of such a philosophical commitment. The task of divorcing science from methodological naturalism requires the abandonment of the idea that the structure of knowledge, or justified belief, requires no epistemic foundation and that inferential justification possess a uniquely superior epistemic status in the sciences than that which is non-inferentially known. As I see it, the persistent problem of science, and thus the criterion of demarcation that undergirds it, is two-fold. First, it is assumed that only inferential knowledge is genuinely justified, and second, that theories must be, at the very least, theoretically falsifiable. In this paper, I intend to provide a criterion of demarcating science that is practical and heuristically useful to spur scientific progress. My proposition does not presuppose the causal powers of chance and necessity. Instead, it forces the scientist to appreciate the ontological characteristics of nature and to leave the question of causation completely open, thereby, avoiding the pitfalls that ontological naturalism, and its faithful ally, methodological naturalism, habitually impose on science.
Źródło:
Filozoficzne Aspekty Genezy; 2016, 13; 75-100
2299-0356
Pojawia się w:
Filozoficzne Aspekty Genezy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pyrite depression by dextrin in flotation with xanthates. Adsorption and floatability studies
Autorzy:
López-Valdivieso, A.
Sanchez-Lopez, A. A.
Padilla-Ortega, E.
Robledo-Cabrera, A.
Galvez, E.
Cisternas, L.
Powiązania:
https://bibliotekanauki.pl/articles/110263.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
adsorption
polysaccharides
dextrin
xanthates
Opis:
Depression of pyrite by dextrin in flotation with xanthates has been studied. The adsorption of dextrin and xanthates at the pyrite/aqueous solution interface has been investigated through electrokinetics, Raman spectroscopy and batch adsorption studies using oxidized pyrite. Microflotation studies were undertaken to evaluate the pyrite depression with dextrin using ethyl and propyl xanthates as the collector. The surface density of ferric hydroxide on pyrite depended on pH and was highest about the iep (pH 7.5) of the oxidized pyrite. Dextrin adsorption was directly related to the surface density of ferric hydroxide and took place through two steps suggesting two adsorption mechanisms on ferric hydroxide. Xanthate adsorption as dixanthogen occurred along with ferric hydroxide dissolution causing partial dextrin desorption from the pyrite surface; consequently, co-adsorption of xanthate and dextrin occurred on the surface. Depression of pyrite flotation with xanthate was determined by the oxidation level of the pyrite surface. Floatability of pyrite with xanthate was highly impaired by dextrin at pH 8 only when the surface density of ferric hydroxide on the pyrite surface was very high.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1159-1171
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiocatalytic degradation of dissolved organic compounds in wastewater
Autorzy:
Jiménez-Becerril, J.
Moreno-López, A.
Jiménez-Reyes, M.
Powiązania:
https://bibliotekanauki.pl/articles/148022.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
wastewater
dissolved organic carbon
radiocatalysis
Opis:
Wastewater containing a high concentration of organic substances was exposed to gamma radiolysis in the presence and absence of a catalyst (TiO2); radiolysis and radiocatalysis were performed by means of continuous and discontinuous irradiation. Dissolved organic carbon (DOC) was the parameter used to estimate the concentration of organic compounds without interference by the high mineral content. The data was well fitted to the pseudo-first-order kinetic model of Langmuir-Hinshelwood. From a [DOC]0 = 140 ± 7 mg/L, the higher DOC degradation (74%) and apparent rate constant (Kapp = 0.083 h−1) were found using discontinuous radiocatalysis. This process could be an alternative method of treatment of industrial or municipal wastewater.
Źródło:
Nukleonika; 2016, 61, 4; 473-476
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnesium biodegradable implants coated with polylactic acid
Autorzy:
Munoz, M.
Rams, J.
Lopez, A.
Matykina, E.
Torres, B.
Powiązania:
https://bibliotekanauki.pl/articles/284077.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implants
biodegradation
magnesium alloys
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 28
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of a Medium Frequency offshore Grid for identification of vessels sailing on high density maritime European routes
Autorzy:
López, A.
Gutiérrez, M.
Ortega, A.
Puente, C.
Morales, A.
Gonzalez, D.
Díaz, E.
Powiązania:
https://bibliotekanauki.pl/articles/259142.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ships identification systems
Grid Method
traffic control centre
SITOR
Opis:
The paper analyses the performance of an Automatic Vessel Identification System on Medium Frequency (AVISOMEF), which works with the Grid Method (GM) on high density maritime European routes using real data and uniformly distributed data. Compared to other systems, AVISOMEF is a novelty, as it is not a satellite system, nor is it limited by a given coverage distance, in contrast to the Automatic Identification System (AIS), though in exceptional circumstances it leans towards it. To perform the analysis, special simulation software was developed. Moreover, a number of maritime routes along with their traffic density data were selected for the study. For each route, two simulations were performed, the first of which based on the uniform traffic distribution along the route, while the second one made use of real AIS data positioning of vessels sailing on the selected routes. The obtained results for both simulations made the basis for formulating conclusions regarding the capacity of selected routes to support AVISOMEF.
Źródło:
Polish Maritime Research; 2017, 4; 18-26
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving of mixing effi ciency in a stirred reactor for lead recycling using computer simulation
Zwiększenie wydajności łączenia w reaktorze mieszalnikowym dla odzysku ołowiu przy użyciu symulacji komputerowej
Autorzy:
Vite-Martinez, P.
Ramirez-Lopez, A.
Romero-Serrano, A.
Chavez-Alcala, F.
Lopez-Ramirez, S.
Powiązania:
https://bibliotekanauki.pl/articles/317869.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
mieszanie ołowiu
ocena wydajności mieszania
stężenie pierwiastka
obliczeniowa mechanika płynów (CFD)
lead stirring
mixing efficiency evaluation
tracer concentration
computational fluid dynamics (CFD)
Opis:
Recycling is helping to reduce environmental risks and damages. Liquid lead is recovered from batteries in stirred batch reactors. Nevertheless it is necessary to establish parameters to evaluate mixing performance in order to make more efficient the industrial practices. Then this work is dedicated to simulate fluid hydro-dynamics in a lead stirred reactor by monitoring the distribution of an injected tracer to find the best injection point. Different injected points have been evaluated monitoring the tracer concentration on a group of points inside the batch to verify mixing. The tracer is assumed as ideal (with the same physical properties than lead). The reactor is a batch with two geometrical sections one cylindrical body and a semispherical on the bottom. The impeller used to promote lead stirring is a shaft with four flat blades. The tracer concentration on the monitoring points is averaged to evaluate the efficiency all around the reactor. Finally invariability of tracer concentration on the monitoring points is adopted as the criterion to evaluate mixing.
Recykling pomaga zredukować ryzyko i szkody związane ze środowiskiem. Ciekły ołów z baterii odnawiany jest w reaktorze mieszalnikowym okresowym. Niemniej jednak, ważne jest by tak ustawić parametry, żeby ocenić skuteczność mieszania, a co za tym idzie, zwiększyć wydajność w praktykach przemysłowych. Następnie w artykule znajdujemy najlepsze miejsce do iniekcji przy użyciu symulacji dynamiki wodnej w płynie w reaktorze mieszalnikowym ołowiu, dzięki obserwacji ruchów wprowadzonego pierwiastka znaczonego. Różne punkty iniekcji zostały sprawdzone i monitorują pierwiastek znaczony w grupie punktów znajdujących się w reaktorze by zweryfikować mieszanie. Z założenia pierwiastek jest idealny (z tymi samymi właściwościami fizycznymi co ołów). Reaktor jest wsadowy z dwoma geometrycznymi sekcjami – jedną z cylindryczną obudową i drugą o półsferycznym dnie. Wirnik napędza mieszanie ołowiu w wale posiadającym cztery płaskie ostrza. Punkty monitorujące mają uśrednione stężenie pierwiastka w taki sposób, aby ocenić wydajność w całym reaktorze. Wreszcie, jednym z kryteriów wprowadzonych dla odpowiedniej oceny wydajności jest również niezmienność stężenia pierwiastka monitorującego.
Źródło:
Inżynieria Mineralna; 2015, R. 16, nr 1, 1; 25-32
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of hydrophobic agglomeration of molybdenite fines in aqueous suspensions
Autorzy:
Yang, B.
Song, S.
Lopez-Valdivieso, A.
Powiązania:
https://bibliotekanauki.pl/articles/110890.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
agglomeration rate
molybdenite fines
hydrophobic agglomeration
Opis:
The kinetics of hydrophobic agglomeration of molybdenite fines in aqueous suspensions has been studied in this work. This study was performed on minus 5 μm molybdenite particles through turbid-ity measurements and imaging. The results have showed that stirring strength and kerosene addition greatly affected the agglomeration rate of molybdenite fines in aqueous suspensions. The higher was the stirring strength, the larger the agglomeration rate was. Kerosene addition enhanced not only the agglom-eration rate, but also the agglomerates structure. It was recommended to use radial impeller for the for-mation of hydrophobic agglomeration, because it produced a stronger shear field in impeller zone.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 181-189
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new Middle Devonian heterocoral from Spain
Autorzy:
Fernandez-Martinez, E
Tourneur, F.
Lopez-Alcantara, A.
Powiązania:
https://bibliotekanauki.pl/articles/21951.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Cantabrian Zone
Heterocorallia
Eifelian
Devonian
heterocoral
Middle Devonian
paleontology
Spain
Opis:
Most of the heterocorals described up to now from strata older than Famennian are of doubtful affinities. Numerous specimens of the new genus and new species here described were collected during a sedimentological study of the Santa Lucía Formation in La Pola de Gordon (León province, Cantabrian Mountains, NW Spain). Stellaphyllia luciensis gen. et sp. nov. is characterized by cylindrical coralla, with a diameter of less than 2 mm and more than 2 cm long, having stellate to more or less rounded outer profile. Four to six septa, less frequently seven, are cojoined axially by a short oblique septum. The few tabulae present are steeply arched. The microstructure of the septa and interseptal elements shows thin elongate microlamellae parallel to a median plate which is granular in appearance. The new genus dated to the lower Eifelian age could be important in understanding the early phylogeny and origin of the order Heterocorallia.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany
Autorzy:
Maxwell, E.E.
Lambers, P.H.
Lopez-Arabello, A.
Schweigert, G.
Powiązania:
https://bibliotekanauki.pl/articles/2082225.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Actinopterygii
Pachycormidae
Lagerstätte
Mesozoic
Kimmeridgian
Bavaria
Nusplingen
Opis:
Pachycormidae is an extinct group of Mesozoic fishes that exhibits extensive body size and shape disparity. The Late Jurassic record of the group is dominated by fossils from the lithographic limestone of Bavaria, Germany that, although complete and articulated, are not well characterized anatomically. In addition, stratigraphic and geographical provenance are often only approximately known, making these taxa difficult to place in a global biogeographical context. In contrast, the late Kimmeridgian Nusplingen Plattenkalk of Baden-Württemberg is a well-constrained locality yielding hundreds of exceptionally preserved and prepared vertebrate fossils. Pachycormid fishes are rare, but these finds have the potential to broaden our understanding of anatomical variation within this group, as well as provide new information regarding the trophic complexity of the Nusplingen lagoonal ecosystem. Here, we review the fossil record of Pachycormidae from Nusplingen, including one fragmentary and two relatively complete skulls, a largely complete fish, and a fragment of a caudal fin. These finds can be referred to three taxa: Orthocormus sp., Hypsocormus posterodorsalis sp. nov., and Simocormus macrolepidotus gen. et sp. nov. The latter taxon was erected to replace “Hypsocormus” macrodon, here considered to be a nomen dubium. Hypsocormus posterodorsalis is known only from Nusplingen, and is characterized by teeth lacking apicobasal ridging at the bases, a dorsal fin positioned opposite the anterior edge of the anal fin, and a hypural plate consisting of a fused parhypural and hypurals. The holotype specimen contributes additional palaeobiological information, with small teleosteans preserved as gastric contents and ribs showing signs of callus formation. These new findings extend our knowledge of the anatomy and diversity of Pachycormidae, and represent an important first step in understanding factors controlling their distribution and morphological variation in the Late Jurassic of Europe.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 3; 429-453
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
Autorzy:
Valderrama-Bravo, C.
Dominguez-Pacheco, A.
Hernandez-Aguilar, C.
Zepeda-Bautista, R.
del Real-Lopez, A.
Pahua-Ramos, M.E.
Arellano-Vazquez, J.L.
Moreno-Martinez, E.
Powiązania:
https://bibliotekanauki.pl/articles/24739.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
Źródło:
International Agrophysics; 2017, 31, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
100G shortwave wavelength division multiplexing solutions for multimode fiber data links
Autorzy:
Cimoli, B.
Estaran Tolosa, J. M.
Rodes Lopez, G. A.
Vegas Olmos, J. J.
Monroy, I. T.
Powiązania:
https://bibliotekanauki.pl/articles/173811.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
vertical-cavity surface-emitting laser (VCSEL)
multimode fiber
MMF
wavelength division multiplexing
WDM
Opis:
We investigate an alternative 100G solution for optical short-range data center links. The presented solution adopts wavelength division multiplexing technology to transmit four channels of 25G over a multimode fiber. A comparative performance analysis of the wavelength-grid selection for the wavelength division multiplexing data link is reported. The analysis includes transmissions over standard optical multimode fiber (OM): OM2, OM3 and OM4.
Źródło:
Optica Applicata; 2016, 46, 3; 409-419
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina
Autorzy:
Armella, M.A.
Garcia-Lopez, D.A.
Babot, M.J.
Deraco, V.
Herrera, C.M.
Saade, L.
Bertelli, S.
Powiązania:
https://bibliotekanauki.pl/articles/2082173.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Mammalia
Notoungulata
calcaneum
astragalus
plantigrade
foot stances
Paleogene
South America
Opis:
Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and Upper Lumbrera formations (middle and late middle Eocene) in northwestern Argentina. We provide detailed descriptions, comparisons, and infer foot stances and range of movements for the taxa implicated. Material studied includes astragali belonging to the oldfieldthomasiid Colbertia lumbrerense (Lower Lumbrera Formation), a set of proximal tarsals referred as Typotheria indet. (Lower Lumbrera Formation), and tarsals (also including navicular and cuboid) of the informal taxon “Campanorco inauguralis” (Upper Lumbrera Formation). The comparison of the tarsals of Colbertia lumbrerense (middle Eocene of Argentina) with Colbertia magellanica (early Eocene of Brazil) reveals several differences including variations on the development and arrangement of articular facets, and the size of the dorsal astragalar foramen in the Argentinean species. The specimen of Typotheria indet. shows morphological affinities with basal interatheriid taxa. However, its larger size contrasting with the overall small body sizes of Eocene interatheriids precludes an indisputable taxonomic assignment. Concerning “Campanorco inauguralis”, our observations indicate that there is no morphological evidence for a close phylogenetic relationship with Mesotheriidae. It presents a “reversed alternating tarsus” condition, which is also observed in Leontiniidae, “Notohippidae”, Toxodontidae, and some typotherians. However, the spectrum of singularities exhibited by this form precludes the assessment of its relationships in the context of the Paleogene radiation of Typotheria and it is necessary to extend the comparison to Eocene notoungulates. Finally, in a morphofunctional context a plantigrade foot posture is inferred for the specimens here reported. These observations have the potential to provide functional proxies for paleoecological reconstructions to be applied to the study of the early radiation of these notoungulate faunas.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 2; 1-17
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry
Autorzy:
Guerrero-Méndez, C.
Saucedo-Anaya, T.
Araiza-Esquivel, M.
Balderas-Navarro, R. E.
López-Martínez, A.
Olvera-Olvera, C.
Powiązania:
https://bibliotekanauki.pl/articles/221594.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Digital Holographic Interferometry
refractive index measurements
phase difference
full-field measurements
Opis:
We present an alternative method to detect and measure the concentration changes in liquid solutions. The method uses Digital Holographic Interferometry (DHI) and is based on measuring refractive index variations. The first hologram is recorded when a wavefront from light comes across an ordinary cylindrical glass container filled with a liquid solution. The second hologram is recorded after slight changing the liquid’s concentration. Differences in phase obtained from the correlation of the first hologram with the second one provide information about the refractive index variation, which is directly related to the changes in physical properties related to the concentration. The method can be used − with high sensitivity, accuracy, and speed − either to detect adulterations or to measure a slight change of concentration in the order of 0.001 moles which is equivalent to a difference of 0.003 g of sodium chloride in solutions. The method also enables to measure and calculate the phase difference among each pixel of two samples. This makes it possible to generate a global measurement of the phase difference of the entire sensed region.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 19-26
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance of reporting ancillary site characteristics, and management and disturbance information at ICOS stations
Autorzy:
Saunders, M.
Dengel, S.
Kolari, P.
Moureaux, C.
Montagnani, L.
Ceschia, E.
Altimir, N.
Lopez-Ballesteros, A.
Maranon-Jimenez, S.
Acosta, M.
Klumpp, K.
Gielen, B.
Op de Beeck, M.
Hortangl, L.
Merbold, L.
Osborne, B.
Grunwald, T.
Arrouays, D.
Boukin, H.
Saby, N.
Nicolini, G.
Papale, D.
Jones, M.
Powiązania:
https://bibliotekanauki.pl/articles/25539.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2018, 32, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 79

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