Autor: López, L. M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fractal morphology of Beta vulgaris L. cell suspension culture permeabilized with Triton X-100
Autorzy:: Arenas-Ocampo, M.
Alamilla-Beltran, L.
Vanegas-Espinoza, P.E.
Camacho-Diaz, B.H.
Campos-Mendiola, R.
Gutierrez-Lopez, G.
Jimenez-Aparicio, A.
Powiązania:: https://bibliotekanauki.pl/articles/25018.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: morphology
Beta vulgaris
cell suspension culture
Triton X-100
morphometry
cell culture
chemical agent
Opis:: n this work, morphology of Beta vulgaris L. cells permeabilized with 0.7 mM of Triton X-100® was evaluated using digital image processing and concepts of fractal dimension (perimeter- area relations). Important morphometric changes were found when the contact-time with chemical agent was increased.The size of cells decreased, the cells lost the roundness and their shape was more sinuous; this behaviour was a result of a probable shrinkage caused by the excess of exposure with the permeabili- zation agent. Morphology of B. vulgaris cells after permeabili- zation, exhibited a fractal nature since the slope of the ratio of the logarithm of the perimeter vs logarithm of the area was higher than unit. Fractal geometry of the cell morphology was affected as a re- sult of the exposure to Triton X-100®. Those changes can be attri- buted to the loss of turgor and structure of the cell wall.
Źródło:: International Agrophysics; 2012, 26, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

Tytuł:: Signature recognition with a hybrid approach combining modular neural networks and fuzzy logic for response integration
Autorzy:: Beltrán, M.
Melin, P.
Trujillo, L.
Lopez, M.
Powiązania:: https://bibliotekanauki.pl/articles/384541.pdf
Data publikacji:: 2010
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: pattern recognition
neural networks
fuzzy logic
Opis:: This paper describes a modular neural network (MNN) with fuzzy integration for the problem of signature recognition. Currently, biometric identification has gained a great deal of research interest within the pattern recognition community. For instance, many attempts have been made in order to automate the process of identifying a person’s handwritten signature; however this problem has proven to be a very difficult task. In this work, we propose a MNN that has three separate modules, each using different image features as input, these are: edges, wavelet coefficients, and the Hough transform matrix. Then, the outputs from each of these modules are combined using a Sugeno fuzzy integral and a fuzzy inference system. The experimental results obtained using a database of 30 individual’s shows that the modular architecture can achieve a very high 99.33% recognition accuracy with a test set of 150 images. Therefore, we conclude that the proposed architecture provides a suitable platform to build a signature recognition system. Furthermore we consider the verification of signatures as false acceptance, false rejection and error recognition of the MNN.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 20-27
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: From Light to Heavy Nuclear Systems, Production and Decay of Fragments Studied with Powerful Arrays
Autorzy:: Casini, G.
Morelli, L.
Barlini, S.
Piantelli, S.
D'Agostino, M.
Baiocco, G.
Marchi, T.
Abbondanno, U.
Ademard, G.
Appannababu, S.
Bini, M.
Bonnet, E.
Borderie, B.
Bougault, R.
Bruno, M.
Chbihi, A.
Cinausero, M.
Degerlier, M.
Fabris, D.
Frankland, J.
Gelli, N.
Gramegna, F.
Gruyer, D.
Gulminelli, F.
Kordyasz, A.
Kozik, T.
Kravchuk, V.
Kulig, P.
Le Neindre, N.
Lopez, O.
Maurenzig, P.
Olmi, A.
Pasquali, G.
Pârlog, M.
Poggi, G.
Rivet, M.
Rosato, E.
Sosin, Z.
Spadaccini, G.
Stefanini, A.
Twarog, T.
Valdrè, S.
Vient, E.
Raduta, A.
Powiązania:: https://bibliotekanauki.pl/articles/1402639.pdf
Data publikacji:: 2015-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 25.70.Gh
25.70.Pq
25.70.Mn
29.40.-n
Opis:: Reactions between heavy-ions at various energy regimes produce many nuclear fragments which can be populated in highly excited states. The study of these fragments, detected at the end of their particle decay, is important to investigate nuclear forces and structure effects. In recent years there have been many efforts to extend these studies towards the drip-lines, i.e. to systems far from the β-stability valley, by using accelerated radioactive beams. The development of such infrastructures is accompanied by the development of more powerful detectors and associated electronics, capable to identify ions with very different sizes and kinetic energies. Here we give two examples which show how advanced arrays can contribute to the studies on nuclear phenomena. The examples come from the European FAZIA collaboration and from recent campaigns with the GARFIELD apparatus, the latter in operation at the INFN Legnaro Laboratory (Italy) where the SPES RIB facility is under construction.
Źródło:: Acta Physica Polonica A; 2015, 127, 5; 1548-1551
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Towards long-term standardised carbon and greenhouse gas observations for monitoring Europe´s terrestrial ecosystems: a review
Autorzy:: Franz, D.
Acosta, M.
Altimir, N.
Arriga, N.
Arrouays, D.
Aubinet, M.
Aurela, M.
Ayres, E.
Lopez-Ballesteros, A.
Barbaste, M.
Berveiller, M.
Biraud, S.
Boukir, H.
Brown, T.
Brummer, C.
Buchmann, N.
Burba, G.
Carrara, A.
Cescatti, A.
Ceschia, E.
Clement, R.
Cremonese, E.
Crill, P.
Darenova, E.
Dengel, S.
D’Odorico, P.
Filippa, G.
Fleck, S.
Fratini, G.
Fub, R.
Gielen, B.
Gogo, S.
Grace, J.
Graf, A.
Grelle, A.
Gross, P.
Grunwald, T.
Haapanala, S.
Hehn, M.
Heinesch, B.
Heiskanen, J.
Herbst, M.
Herschlein, C.
Hortangl, L.
Hufkens, K.
Ibrom, A.
Jolivet, C.
Joly, L.
Jones, M.
Kiese, R.
Klemendsson, L.
Kljun, N.
Klumpp, K.
Kolari, P.
Kolle, O.
Kowalski, A.
Kutsch, W.
Laurila, T.
De Ligne, A.
Linder, S.
Lindroth, A.
Lohila, A.
Longdoz, B.
Mammarella, I.
Manise, T.
Maranon Jimenez, S.
Matteucci, G.
Mauder, M.
Meier, P.
Merbold, L.
Mereu, S.
Metzger, S.
Migliavacca, M.
Molder, M.
Montagnani, L.
Moureaux, C.
Nelsson, D.
Nemitz, E.
Nicolini, G.
Nilsson, M.B.
Op de Beeck, M.
Osborne, B.
Lofvenius, M.O.
Pavelka, M.
Peichl, M.
Peltola, O.
Pihlatie, M.
Pitacco, A.
Pokorny, R.
Pumpanen, J.
Ratie, C.
Rebmann, C.
Roland, M.
Sabbatini, S.
Saby, N.P.A.
Saunders, M.
Schmid, H.P.
Schrumpf, M.
Sedlak, P.
Serrano Ortiz, P.
Siebicke, L.
Sigut, L.
Silvennoinen, H.
Simioni, G.
Skiba, U.
Sonnentag, O.
Soudani, K.
Soule, P.
Steinbrecher, R.
Tallec, T.
Thimonier, A.
Tuittila, E.-S.
Tuovinen, J.P.
Vestin, P.
Vncent, G.
Vincke, S.
Vitalle, D.
Waldner, P.
Weslien, P.
Wingate, L.
Wohlfahrt, G.
Zahniser, M.
Vesala, T.
Powiązania:: https://bibliotekanauki.pl/articles/25745.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

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Skocz do pozycji: 6.

Tytuł:: Influence of the winter phytoplankton bloom on the settled material in a temperate shallow estuary
Autorzy:: Guinder, V.A.
Lopez-Abbate, M.C.
Berasategui, A.A.
Negrin, V.L.
Zapperi, G.
Pratolongo, P.D.
Fernandez Severini, M.D.
Popovich, C.A.
Powiązania:: https://bibliotekanauki.pl/articles/47931.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: phytoplankton bloom
chlorophyll a
sediment trap
resuspension
shallow estuary
pelagic food web
nutrient concentration
particulate organic matter
coastal environment
Źródło:: Oceanologia; 2015, 57, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A field trial of recombinant Schistosoma japonicum paramyosin as a potential vaccine in naturally-infected water buffaloes
Autorzy:: Jiz II, M.A.L.
Mingala, C.N.
Lopez, I.F.M.
Chua, M.
Gabonada Jr., F.G.
Acosta, L.P.
Wu, H.
Kurtis, J.D.
Powiązania:: https://bibliotekanauki.pl/articles/6326.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Parazytologiczne
Opis:: The overall aims of this project are to assess the safety and immunogenicity of the Schistosoma japonicum vaccine paramyosin among water buffaloes residing in endemic areas. The study was conducted in four villages in Leyte, the Philippines, an area highly endemic for schistosomiasis japonica. One hundred and fifteen (N=115) animals provided baseline stool samples for coprologic examination, with preliminary results using FLOTAC showing a 10% prevalence of schistosomiasis. Forty-nine (N=49) animals consented to treatment with 25 mg/kg Praziquantel, and 40, 36 and 32 animals consented to the first, second and third dose of the paramyosin vaccine, respectively. The safety trial involved the first 20 animals and included skin testing, vaccination, anaphylaxis monitoring, as well as hematology and serum chemistry analysis. Skin tests revealed that only three out of 20 animals exhibited redness at the injection site, with none greater than 1 cm. None of the animals exhibited anaphylaxis, and all hematology and serum chemistry markers were within normal range or were similar to pre-vaccination levels. None of the 40 animals administered with the first dose exhibited anaphylaxis, nor any of the subsequent vaccine doses. Immunogenicity assessment of sera collected prior to every vaccination and one month after the last dose showed that the paramyosin vaccine induced robust antibody responses to all animals, as assessed by ELISA. The cytokine levels of whole blood culture supernatants will be further assessed. Our findings demonstrate that the S. japonicum paramyosin vaccine is a safe, well-tolerated and immunogenic treatment among water buffalos residing in endemic areas.
Źródło:: Annals of Parasitology; 2016, 62, 4
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: No greens in the forest? Note on the limited consumption of greens in the Amazon
Autorzy:: Katz, E.
Lopez, C.L.
Fleury, M.
Miller, R.P.
Paye, V.
Dias, T.
Silva, F.
Oliveira, Z.
Moreira, E
Powiązania:: https://bibliotekanauki.pl/articles/58954.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Botaniczne
Źródło:: Acta Societatis Botanicorum Poloniae; 2012, 81, 4
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Support to maritime and inland waterways service providers for the transmission of EGNOS Corrections via IALA beacons and AIS/VDES stations
Autorzy:: López, M.
Cano, M.
Martínez, R.
Álvarez, C.
Tavira, L.
Morán, J.
Antón, V.
Vázquez, J.
Powiązania:: https://bibliotekanauki.pl/articles/117535.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: inland waterways
IALA beacons
AIS stations
VDES stations
EGNOS
EGNOS corrections
AIS Service Manager (ASM)
Virtual Reference Station (VRS)
Opis:: The use of SBAS corrections for navigation, in both coastal waters and inland waterways, has already brought the attention of many European authorities, which are interested in its potential to complement/replace their DGPS radio beacon networks. The European GNSS Agency (GSA) has an active long-term trajectory working to foster the EGNOS adoption in maritime through the launch of several actions whose results will pave the way for the provision of maritime EGNOS services. In this line, GSA awarded the consortium ALG-Indra, ESSP and Alberding with the Specific Contract GSA/OP/07/13/SC24 ‘Support to Maritime Service Providers for the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations’. The main objective of this Specific Contract is to demonstrate the operational performance of the transmission of EGNOS corrections converted to Differential GPS corrections over the existing transmission infrastructure (AIS base stations/IALA beacons) in the Maritime and Inland Waterways (IWW) domains, while providing a detailed cost benefit analysis of the solutions proposed. This service may complement the current GNSS augmentation services exploiting synergies and benefiting from the current infrastructure and standards, facilitating the adoption of EGNOS by maritime and inland waterways authorities. Furthermore, the service has no impact at user level since the DGNSS corrections are transmitted over the existing infrastructure, in the same format and implementing the same integrity mechanisms required for traditional IALA beacons ([1]). This project will allow the maritime and IWW service providers to have a clear understanding about the technical, operational and economic feasibility of the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 45-52
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Robust sensor fault estimation for descriptor-LPV systems with unmeasurable gain scheduling functions: Application to an anaerobic bioreactor
Autorzy:: López-Estrada, F. R.
Ponsart, J. C.
Theilliol, D.
Astorga-Zaragoza, C. M.
Camas-Anzueto, J. L.
Powiązania:: https://bibliotekanauki.pl/articles/331392.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: fault diagnosis
fault estimation
LPV systems
observer design
descriptor system
diagnostyka uszkodzeń
estymacja błędu
obserwator
układ deskryptorowy
Opis:: This paper addresses the design of a state estimation and sensor fault detection, isolation and fault estimation observer for descriptor-linear parameter varying (D-LPV) systems. In contrast to where the scheduling functions depend on some measurable time varying state, the proposed method considers the scheduling function depending on an unmeasurable state vector. In order to isolate, detect and estimate sensor faults, an augmented system is constructed by considering faults to be auxiliary state vectors. An unknown input LPV observer is designed to estimate simultaneously system states and faults. Sufficient conditions to guarantee stability and robustness against the uncertainty provided by the unmeasurable scheduling functions and the influence of disturbances are synthesized via a linear matrix inequality (LMI) formulation by considering H∞ and Lyapunov approaches. The performances of the proposed method are illustrated through the application to an anaerobic bioreactor model.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2015, 25, 2; 233-244
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Bioinspired, biomimetic, double-enzymatic mineralization of hydrogels for bone regeneration with calcium carbonate
Autorzy:: Lopez-Heredia, M. A.
Łapa, A.
Mendes, A. C.
Balcaen, L.
Samal, S. K.
Chai, F.
Voort, P. van der
Stevens, C. V.
Parakhonskiy, B. V.
Chronakis, I. S.
Vanhaecke, F.
Blanchemain, N.
Pamuła, E.
Skirtach, A. G.
Douglas, T. E. L.
Powiązania:: https://bibliotekanauki.pl/articles/285532.pdf
Data publikacji:: 2016
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: hydrogels
bone regeneration
mineralization
Źródło:: Engineering of Biomaterials; 2016, 19, 138; 109
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Welding Effects on the Mechanical Integrity of a Trip800 Steel: a Comparison of Laser Co2 and Gmaw Processes
Wpływ spawania na integralność mechanicznaą stali Trip800: porównanie spawania laserowego ze spawaniem elektrodą topliwą
Autorzy:: Perez-Medina, G. Y.
Lopez, H. F.
Reyes-Valdes, F. A.
Garza-Gomez, A.
Lopez-Ochoa, L. M.
Powiązania:: https://bibliotekanauki.pl/articles/351511.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: laser
GMAW
retained austenite
color metallography
spawanie elektrodą topliwą
austenit resztkowy
metalografia barwna
Opis:: In this work a strip of a transformation induced plasticity (TRIP) steel was welded using gas metal arc welding (GMAW) and Laser CO₂ welding (LBW) processes and the resultant strength and ductility of the welded joints evaluated. It was found that LBW lead to relatively high hardness in the fusion zone, FZ where the resultant microstructure was predominantly martensite. The relative volume fractions of phases developed in the welded regions were quantitatively measured using color metallography combined with X-ray diffraction analyses. It was found that the heat affected zone, HAZ developed the maximum amount of martensite (up to 32%) in the steel welded using LBW besides a mixture of bainite, retained austenite and ferrite phases. In contrast, a relatively low percent of martensite (10.8%) was found in the HAZ when the GMAW process was implemented.
Pas ze stali typu TRIP poddano spawaniu elektrodą topliwą oraz spawaniu laserowemu i oceniono wytrzymałość i plastyczność uzyskanych połączeń spawanych. Stwierdzono, że spawanie laserowe prowadzi do uzyskania stosunkowo wysokiej twardości w strefie łączenia, gdzie powstała mikrostrukturę stanowi głównie martenzyt. Względne udziały objętościowe faz w spawanych obszarach zmierzono ilościowo za pomocą barwnej metalografii w połączeniu z dyfrakcyjną analizą rentgenowską. Stwierdzono, że w przypadku stali spawanej laserowo strefa wpływu ciepła zawiera najwięcej martenzytu (do 32%), a oprócz tego mieszanine bainitu, resztkowego austenitu i ferrytu. Natomiast w strefie wpływu ciepła uzyskanej podczas spawania elektrodą topliwą stwierdzono stosunkowo niską zawartość martenzytu (10,8%).
Źródło:: Archives of Metallurgy and Materials; 2014, 59, 4; 1427-1432
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: THE EFFECT OF SCHOOL PHYSICAL EDUCATION PROGRAMMES ON LOW-BACK PAIN IN SCHOOLCHILDREN
Autorzy:: Rodríguez-García, Pedro L.
López-Miñarro, Pedro A.
Santonja, Fernando M.
Powiązania:: https://bibliotekanauki.pl/articles/449204.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:: spine
physical exercises
children
adolescents
Opis:: Objective: to evaluate the efficacy of a 32-week school physical education programme on low-back pain in elementary and secondary schoolchildren. Material and methods: Forty-one elementary school children (fifth-grade, mean age of 10.27 ± 0.31 years) and 43 secondary school adolescents (twograde, mean age of 13.46 ± 0.68 years) were assigned to the control (n = 40) or intervention group (n = 44). The intervention subjects were involved in an organised physical education programme including hamstrings stretching, endurance strength of the abdominal and lumbar muscles, and pelvic tilt during the two-weekly school physical education classes over 32 weeks. The control group was not subjected to the organized programme. Low back pain was registered and pain intensity was recorded using the Visual Analogue Scale. Results: The experimental group showed a statistically significant decrease of low back pain frequency while the control group evidenced an increase. For pain intensity no significant differences were found. Conclusion: The children and adolescents who were subjected to the school physical education programme showed a reduction of low back pain frequency, while a tendency toward the rising frequency of low back pain was detected for the control subjects.
Źródło:: Journal of Physical Education & Health - Social Perspective; 2013, 2, 4; 43-48
2084-7971
Pojawia się w:: Journal of Physical Education & Health - Social Perspective
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Determination of the JWL Constants for ANFO and Emulsion Explosives from Cylinder Test Data
Autorzy:: Sanchidrián, J. A.
Castedo, R.
López, L. M.
Segarra, P.
Santos, A. P.
Powiązania:: https://bibliotekanauki.pl/articles/358385.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: cylinder test
JWL equation of state
LS-DYNA
ANFO
emulsion explosives
Opis:: The Jones-Wilkins-Lee (JWL) equation of state parameters for ANFO and emulsion-type explosives have been obtained from cylinder test expansion measurements. The calculation method comprises a new radial expansion function, with a non-zero initial velocity at the onset of the expansion in order to comply with a positive Gurney energy at unit relative volume, as the isentropic expansion from the CJ state predicts. The equations reflecting the CJ state conditions and the measured expansion energy were solved for the JWL parameters by a non-linear least squares scheme. The JWL parameters of thirteen ANFO and emulsion type explosives have been determined in this way from their cylinder test expansion data. The results were evaluated through numerical modelling of the tests with the LS-DYNA hydrocode; the expansion histories from the modelling were compared with the measured ones, and excellent agreement was found.
Źródło:: Central European Journal of Energetic Materials; 2015, 12, 2; 177-194
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki