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    Wyświetlanie 1-22 z 22
    Tytuł:
    Numerical simulation of the influence of a fillet and a bulb on the secondary flow in a compressor cascade
    Autorzy:
    Hoeger, M.
    Schmidt-Eisenlohr, U.
    Gomez, S.
    Sauer, H.
    Müller, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1986762.pdf
    Data publikacji:
    2002
    Wydawca:
    Politechnika Gdańska
    Tematy:
    secondary flow
    compressor cascade
    fillet
    bulb
    Opis:
    Large fillet radii are typically found on highly loaded compressor rotors to ensure structural integrity. The objective of this paper is to investigate the impact of such real geometry effects on the flow at the hub section. Investigations were performed numerically for the idealised case of a plane compressor cascade with the 3D Navier-Stokes code TRACE_S. Realistic inlet boundary layer displacement thickness and typical loading levels close to stall are considered at low inlet Mach numbers Ma1 = 0.23. A large fillet with a relative radius of 16% chord length is considered as well as a 3D leading edge bulb-configuration designed at TU Dresden. The results are discussed in terms of iso-Mach surfaces, secondary flow patterns and spanwise incidence and turning. A complex 3D vortex system rises from the fillet radius, which improves the aerodynamic behaviour of the cascade at the end-wall section. With the bulb configuration the suction surface horse-shoe vortex leg was demonstrated to weaken the undesirable cross flow and by that to reduce the hazard of corner stall.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 1; 25-37
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency of Software Testing Techniques: A Controlled Experiment Replication and Network Meta-analysis
    Autorzy:
    Gómez, O. S.
    Cortés-Verdín, K.
    Pardo, C. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384107.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    software verification
    software testing
    controlled experiment
    experiment replication
    meta-analysis
    network meta-analysis
    quantitative synthesis
    Opis:
    Background. Common approaches to software verification include static testing techniques, such as code reading, and dynamic testing techniques, such as black-box and white-box testing. Objective. With the aim of gaining a better understanding of software testing techniques, a controlled experiment replication and the synthesis of previous experiments which examine the efficiency of code reading, black-box and white-box testing techniques were conducted. Method. The replication reported here is composed of four experiments in which instrumented programs were used. Participants randomly applied one of the techniques to one of the instrumented programs. The outcomes were synthesized with seven experiments using the method of network meta-analysis (NMA). Results. No significant differences in the efficiency of the techniques were observed. However, it was discovered the instrumented programs had a significant effect on the efficiency. The NMA results suggest that the black-box and white-box techniques behave alike; and the efficiency of code reading seems to be sensitive to other factors. Conclusion. Taking into account these findings, the Authors suggest that prior to carrying out software verification activities, software engineers should have a clear understanding of the software product to be verified; they can apply either black-box or white-box testing techniques as they yield similar defect detection rates.
    Źródło:
    e-Informatica Software Engineering Journal; 2017, 11, 1; 77-102
    1897-7979
    Pojawia się w:
    e-Informatica Software Engineering Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cellular particle swarm optimization with a simple adaptive local search strategy for the permutation flow shop scheduling problem
    Autorzy:
    Seck-Tuoh-Mora, Juan C.
    Medina-Marin, Joselito
    Martinez-Gomez, Erick S.
    Hernandez-Gress, Eva S.
    Hernandez-Romero, Norberto
    Volpi-Leon, Valeria
    Powiązania:
    https://bibliotekanauki.pl/articles/230060.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    flow shop
    particle swarm optimization (PSO)
    local search strategy
    hybrid search method
    cellular automata
    scheduling
    Opis:
    Permutation flow shop scheduling problem deals with the production planning of a number of jobs processed by a set of machines in the same order. Several metaheuristics have been proposed for minimizing the makespan of this problem. Taking as basis the previous Alternate Two-Phase PSO (ATPPSO) method and the neighborhood concepts of the Cellular PSO algorithm proposed for continuous problems, this paper proposes the improvement of ATPPSO with a simple adaptive local search strategy (called CAPSO-SALS) to enhance its performance. CAPSO-SALS keeps the simplicity of ATPPSO and boosts the local search based on a neighborhood for every solution. Neighbors are produced by interchanges or insertions of jobs which are selected by a linear roulette scheme depending of the makespan of the best personal positions. The performance of CAPSO-SALS is evaluated using the 12 different sets of Taillard’s benchmark problems and then is contrasted with the original and another previous enhancement of the ATPPSO algorithm. Finally, CAPSO-SALS is compared as well with other ten classic and state-of-art metaheuristics, obtaining satisfactory results.
    Źródło:
    Archives of Control Sciences; 2019, 29, 2; 205-226
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A DFT study or the relationship between the electronic structure and the antiplasmodial activity of a series of 4-anilino-2-trichloromethylquinazolines derivatives
    Autorzy:
    Anatovi, Wilfried
    Kpotin, Gaston A.
    Kuevi, Urbain A.
    Houngue-Kpota, Alice
    Atohoun, Guy S.
    Mensah, Jean-Baptiste
    Gómez-Jeria, Juan S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178269.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    4-anilino-2-trichloromethylquinazolines
    DFT
    KPG method
    QSAR
    antiplasmodial
    Opis:
    A theoretical study of the relationships between the electronic structure and the antiplasmodial activity of a series of 4-anilino-2-trichloromethylquinazolines derivatives on plasmodium genes was carried out. The electronic structure of molecules was calculated at the B3LYP/6-31G(d,p) level with full geometry optimization. A statistically significant equation (R = 0.98, R² = 0.96, adj-R² = 0.94, F (12, 20) = 43.49 (p < 0.000001) and SD = 0.12) was obtained relating the variation of the biological activity with the variation of a set of local atomic reactivity indices. Based on the analysis of the results, a two-dimensional antiplasmodial pharmacophore was proposed. The process seems to be orbital and charge controlled.
    Źródło:
    World Scientific News; 2017, 88, 2; 138-151
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prześwietlanie Dzienników w Gombrowicz, este hombre me causa problemas Juana Carlosa Gómeza
    Vetting of Gombrowicz’s “Diary” in “Gombrowicz, este hombre me causa problemas” by Juan Carlos Gómez
    Autorzy:
    Pielacińska, Nina
    Powiązania:
    https://bibliotekanauki.pl/articles/1399636.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    autobiography
    diary
    essay
    Witold Gombrowicz
    Juan Carlos Gómez
    autobiografia
    dziennik
    esej
    Opis:
    Celem niniejszego artykułu jest omówienie eseju Gómeza pt. Milonga dla Gombrowicza, w którym autor punktem wyjścia do refleksji czyni Dzienniki. Perspektywa biograficzna, Gómez był bowiem jednym z najbliższych argentyńskich przyjaciół polskiego pisarza, pozwoliła spojrzeć na omawiany tekst jako na upublicznioną, choć intymną historię ich wzajemnej relacji. Z przeprowadzonej analizy wynika, że twórczość autora Ferdydurke była dla Gómeza metaforycznym powrotem do rozmów przerwanych wyjazdem pisarza, pretekstem do zaprezentowania swoich filozoficznych poglądów, a nade wszystko przekonania czytelników do tego, że to właśnie on jest jedynym „spadkobiercą tronu” po Gombrowiczu.
    This paper discusses “Milonga for Gombrowicz”, an essay written by Juan Carlos Gómez in which the author begins by reflecting upon Gombrowicz’s “Diary”. As Gómez was one of the Polish writer’s closest Argentinean friends, the biographical perspective enables the text in question to be read as an intimate history of their relationship that is also shared with the public. As the analysis presented in this article shows, Gombrowicz’s work offered Gómez an opportunity to metaphorically resume their conversations which had been disrupted when Gombrowicz departed Argentina, providing him with a pretext to present his own philosophical views, and above all to convince readers that he was the only legitimate “heir” to Gombrowicz’s “throne”.
    Źródło:
    Autobiografia Literatura Kultura Media; 2019, 13, 2; 117-130
    2353-8694
    2719-4361
    Pojawia się w:
    Autobiografia Literatura Kultura Media
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study of layouts of PDC cutters in core bit drilling
    Autorzy:
    Buitrago Gomez, L. A.
    Miska, S. Z.
    Ziaja, M. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/299255.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    PDC cutter
    cutters layout
    PDC bit
    coring
    drilling efficiency
    Opis:
    Over the past two decades, various single cutter force models have been developed that consider formation properties and bit characteristics. These models have been extensively used to describe the interaction of a Polycrystalline Diamond Compact (PDC) bit with formation rocks; however, their use to predict bit drilling efficiency is usually inadequate. There is an ample of field evidence that the density and layouts of PDC cutters affect drilling efficiency. Still, however, there is no reliable model of the PDC bit performance allowing determination of these bit design features for a specific bit's applications. In order to better understand the relationship between rock properties and PDC cutter layouts for different bit applications, laboratory drilling tests were performed with PDC core bits. The concept of an eight-blade PDC core bit was used to build a bit with a common body and replaceable heads. Core-bit design features such as: bit, cutter size, and cutter geometry were constant. In this study, the full-scale test rig facility at the University of Tulsa was used to obtain consistent data for six different layouts of PDC cutters. Operating parameters, such as the rate per minute (RPM) and weight on bit (WOB), were varied and performance parameters (rate of penetration (ROP) and bit torque (TQB)), were measured at each time step with the frequency of 10 Hz. The ROP were calculated as a function of bit displacement over time. All operating parameters were recorded as part of the data acquisition platform. Depth of Cut (DOC) was calculated from ROP, and the average WOB and TQB were estimated at each depth of cut. Tests were performed on two different rocks: Bedford and Carthage Limestones. For the purpose of comparing performance among different cutter layouts, we experiment with a maximum of four different depths of cut, which corresponded to four different weights on bit. The tested layouts allowed a constant maximum DOC per cutter of 0.25 in. Water was the drilling fluid for the entire experimental phase. The results showed that under the same drilling parameters, the cutter layout plays a key role in drilling efficiency. Strong linear relationships were found between DOC, WOB and TQB at different conditions that were characteristic of the specific bit design. Also, the PDC cutter layouts affected the relative drilling performance differently for different rock properties.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 2; 341-360
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Viaje maldito en “La universidad desconocida”, de Roberto Bolaño
    Cursed travel in Roberto Bolaño’s "La Universidad Desconocida"
    Autorzy:
    Gómez, Leila
    Tuninetti, Ángel
    Powiązania:
    https://bibliotekanauki.pl/articles/1051171.pdf
    Data publikacji:
    2013-01-01
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    exile
    poetry
    travel
    university
    Mexico
    Barcelona
    cursed poet
    Opis:
    This paper focuses on the seldom studied poetry of Roberto Bolaño, using "La Universidad Desconocida", the exhaustive compilation published posthumously in 2007. Although Bolaño received wide recognition and many awards for his novels, he defined himself as a poet. In his poetry, we find the same topics and tendencies that he developed in the characters and plots of his narratives. A prime example is "Los detectives salvajes", a novel about a group of young rebel poets in the Mexico of the seventies. Bolaño’s poet characters, as well as his travels, exiles and criticisms of the literary establishment, take on a new light when compared alongside his poetry. this article explores the modes of poetic production as understood by Bolaño, as a way of life outside universities, the literary canon, and any other institutional networks. Instead, his poetic production is marked by the figure of Arthur Rimbaud as the archetype of the cursed poet.
    Źródło:
    Studia Romanica Posnaniensia; 2013, 40, 2; 63-73
    0137-2475
    2084-4158
    Pojawia się w:
    Studia Romanica Posnaniensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reviews: Women’s Everyday Life and Their Life Stories in the Time of Communism: A Comparative Study Between Poland, Romania, and the Former German Democratic Republic (GDR)
    Autorzy:
    Mendoza, Miguel Angel Gomez
    Powiązania:
    https://bibliotekanauki.pl/articles/2056556.pdf
    Data publikacji:
    2021-12-01
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Źródło:
    Studia Historiae Oeconomicae; 2021, 39; 266-269
    0081-6485
    Pojawia się w:
    Studia Historiae Oeconomicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Affective Computing-A Rationale for Measuring Mood With Mouse and Keyboard
    Autorzy:
    Zimmermann, P.
    Guttormsen, S.
    Danuser, B.
    Gomez, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90061.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    affective computing
    mood
    emotions
    HCl
    klawiatura
    pozycja przy pracy
    komputer
    zagrożenia zdrowia
    emocjonalność
    psychologia pracy
    Opis:
    Emotions are an increasingly important factor in Human-Computer Interaction (HCI). Up to the present, emotion recognition in HCI implies the use of explicit or intrusive methods, for example, video cameras or physiological measurements. We are developing and evaluating a method for the measurement of affective states through motor-behavioral parameters from standard input devices (mouse and keyboard).
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 539-551
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    M.J. Peláez, P.Z. Moral, M.E. Gómez Rojo, M. del Carmen Amaya Galván, C.C. Rodriges, Una investigación sobre la historia de la Asociación Española de Derecho Marítimo
    Autorzy:
    k, Leonard Ł u k a s z u
    Powiązania:
    https://bibliotekanauki.pl/articles/706411.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Prawo Morskie; 2013, XXIX
    0860-7338
    Pojawia się w:
    Prawo Morskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The efficiency of drip fertigation in cultivation of winter squash „Gomez” on the very light soil
    Autorzy:
    Rolbiecki, R.
    Rolbiecki, S.
    Figas, A.
    Wichrowska, D.
    Jagosz, B.
    Ptach, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/101275.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    carotenoids
    Cucurbita maxima Duch
    dry matter
    fruit yield
    sugar
    vitamin C
    Opis:
    The study of drip fertigation of winter squash ‘Gomez’ was conducted on the very light soil on the experimental field in Kruszyn Krajeński near Bydgoszcz in the years 2007 and 2008. The research was established as one-factorial, using the method of drawn blocks, in four replications. Drip fertigation (DF) as the liquid fertilization supplied nitrogen, potassium and phosphorus to the plants three times during growing season. As the control (DP), the drip irrigation combined with broadcast application was used. The potassium and phosphorus fertilization of control plots was applied before seed sawing. The nitrogen fertilization of control plots was provided in three single doses during vegetation. The liquid and powder fertilizations were performed at the same time. The complex fertilizer ‚Universol Blue’ (N:P:K = 18:11:18) was used. The dose of fertilizer was 3:2:3 (187.5:125:187.5 kg of NPK per ha). The irrigation was conducted using the drip line ‚T-Tape’. The liquid fertilizer was mixed by the ‚Dosatron’ dispenser. The irrigation started when the soil water pressure, measured with the tensiometers, was near - 0.04 MPa. In comparison to the control (powder fertilization), the drip fertigation (liquid fertilization) significantly increased marketable fruit yield, single fruit weight and fruit number. Most of the tested chemical components of ‘Gomez’ fruits (vitamin C, total sugar, monosaccharides, saccharose, total carotenoids and ß-carotin) were not significantly influenced by drip fertigation. However, the level of dry weight of winter squash ‘Gomez’ fruits was reduced by drip fertigation.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/2; 1201-1211
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Pattern Fabrication in Amorphous Silicon Carbide with High-Energy Focused Ion Beams
    Autorzy:
    Tsvetkova, T.
    Takahashi, S.
    Sellin, P.
    Gomez-Morilla, I.
    Angelov, O.
    Dimova-Malinovska, D.
    Zuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503892.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.75.Ak
    42.70.Ln
    68.37.Uv
    73.61.Jc
    Opis:
    Topographic and optical patterns have been fabricated in a-SiC films with a focused high-energy (1 MeV) $H^{+}$ and $He^{+}$ ion beam and examined with near-field techniques. The patterns have been characterized with atomic force microscopy and scanning near-field optical microscopy to reveal local topography and optical absorption changes as a result of the focused high-energy ion beam induced modification. Apart of a considerable thickness change (thinning tendency), which has been observed in the ion-irradiated areas, the near-field measurements confirm increases of optical absorption in these areas. Although the size of the fabricated optical patterns is in the micron-scale, the present development of the technique allows in principle writing optical patterns up to the nanoscale (several tens of nanometers). The observed values of the optical contrast modulation are sufficient to justify the efficiency of the method for optical data recording using high-energy focused ion beams.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 56-59
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Availability and characteristics of the historical and recent aerial photographs and orthophotographs in Spain for the analysis of rill and gully erosion
    Autorzy:
    García, Jariego
    Gutiérrez, Gómez
    Lavado Contador, F.
    Schnabel, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/294358.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    rill and gully erosion
    aerial photographs and orthophotograph
    Spain
    Opis:
    Several kinds of methodologies and techniques have been used indeed in order to monitor rill and gully erosion processes. In this paper authors provide a guidance regarding the available aerial photographs and orthophotographs for rill and gully erosion studies in Spain and covering the whole country. A set of 8 different series of aerial photographs and orthophotographs were located in Spain. Their characteristics were quite diverse, differing in scales, formats and resolution. Most of the photographs and orthophotographs proved, at least, to be suitable for their use in studies of permanent gullies, allowing the monitoring of medium and long-term erosion rates since 1945.
    Źródło:
    Landform Analysis; 2011, 17; 51-55
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New concrete additive by chemical recycling of PET
    Autorzy:
    Mendivil-Escalante, J M
    Almaral-Sánchez, J L
    Gómez-Soberón, J M
    Arredondo-Rea, S P
    Corral-Higuera, R
    Castro-Beltrán, A
    Cabrera-Covarrubias, F G
    Powiązania:
    https://bibliotekanauki.pl/articles/102237.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    concrete admixture
    glycolysis
    polymeric resins
    polyethylene terephthalate
    Opis:
    Due to the problem that represents the accelerated production of waste from the consumption of polyethylene terephthalate (PET), it becomes necessary to look for alternative solutions; chemical recycling is a suitable method for conversion into a material with potential application in concrete additive, such as unsaturated polyester resins; with the above improvements and conservation of non-renewable raw materials can reduce the environmental impact. This investigation was focused on obtaining the synthesis of a polymeric resin by the method of glycolysis, and their characterization by Infrared Spectroscopy (FT-IR); the results show that the recycled materials (PET and its processing) are similar to reagents made from primary materials so that it is considered feasible to use in the intended application.
    Źródło:
    Advances in Science and Technology. Research Journal; 2014, 8, 23; 1-5
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A finite element model of the L4-L5-S1 human spine segment including the heterogeneity and anisotropy of the discs
    Autorzy:
    Jaramillo, H.
    Gomez, L.
    Garcia, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/951814.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    kręgosłup
    metoda elementów skończonych
    segment L4-L5-S1
    krążek międzykręgowy
    model hipersprężysty
    intervertebral disc
    L4-L5-S1 segment
    finite element model
    human spine
    hyperelastic model
    Opis:
    With the aim to study disc degeneration and the risk of injury during occupational activities, a new finite element (FE) model of the L4-L5-S1 segment of the human spine was developed based on the anthropometry of a typical Colombian worker. Beginning with medical images, the programs CATIA and SOLIDWORKS were used to generate and assemble the vertebrae and create the soft structures of the segment. The software ABAQUS was used to run the analyses, which included a detailed model calibration using the experimental step-wise reduction data for the L4-L5 component, while the L5-S1 segment was calibrated in the intact condition. The range of motion curves, the intradiscal pressure and the lateral bulging under pure moments were considered for the calibration. As opposed to other FE models that include the L5-S1 disc, the model developed in this study considered the regional variations and anisotropy of the annulus as well as a realistic description of the nucleus geometry, which allowed an improved representation of experimental data during the validation process. Hence, the model can be used to analyze the stress and strain distributions in the L4-L5 and L5-S1 discs of workers performing activities such as lifting and carrying tasks.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 2; 15-24
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Engineering the optical and mechanical properties exhibited by a titanium dioxide thin film with gold nanoparticles
    Autorzy:
    Morales-Bonilla, S
    Torres-Torres, C
    Trejo-Valdez, M
    Torres-Torres, D
    Urriolagoitia-Sosa, G
    Hernandez-Gomez, L H
    Urriolagoitia-Calderon, G
    Powiązania:
    https://bibliotekanauki.pl/articles/174855.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    optical Kerr effect
    nonlinear optics
    nanomaterials
    Opis:
    Thermo-optic and electrostrictive contributions to the nonlinear refractive index were observed in a titanium dioxide thin film with embedded gold nanoparticles. A sol–gel method was employed for preparing thin solid film samples. The nanosecond nonlinear optical properties and the Young’s modulus parameter were changed by shifting the optical absorption band associated with the localized surface plasmon of resonance of the gold nanoparticles with platinum. The third order nonlinear optical phenomena exhibited by the sample were induced by the second harmonic of a Nd-YAG laser with 532 nm wavelength; the nonlinear optical measurements were obtained by monitoring the transmittance and the amplitude modification for the vectorial components of the electric fields in a two-wave interaction. Optical evaluations were confirmed considering a straightforward measurement of the change in the refractive index of the sample when the sample was located in a Michelson interferometer.
    Źródło:
    Optica Applicata; 2013, 43, 4; 651-661
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The origin and development of a valley bottom gully in a small rangeland catchment : influences of land use in the growth model
    Autorzy:
    Gómez Gutiérrez, A.
    Schnabel, S.
    Lavado Contador, F.
    Jariego García, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/294651.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    gully erosion
    aerial photographs and orthophotographs
    land use and vegetation cover
    Opis:
    In the present paper, 8 aerial orthophotographs were used for analysing the evolution of a valley bottom gully and its relationship with land use and vegetation cover in SW Spain. In addition, the growth model observed was compared with the literature. Results showed an increase in the area affected by gullying during the period by 314 m2 and a clear relationship between the areas affected by gullying and land use intensity was found.
    Źródło:
    Landform Analysis; 2011, 17; 65-70
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of innovative biopolymers designed for bone regeneration applications and in vitro study of their biocompatibility and osteogenic capacity on human bone marrow mesenchymal stem cells
    Autorzy:
    Basile, M. S.
    Gomez d'Ayala, G.
    Laurienzo, P.
    Malinconico, M.
    Oliva, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/284365.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    functionalization of poly(ε-caprolactone)
    bone marrow mesenchymal stem cells
    Opis:
    In the frame of a project aiming to the improvement of the properties of biodegradable polyester-based devices, designed for bone regeneration, we have prepared and characterized novel composites based on poly(ε-caprolactone) (PCL). In particular, we report in this paper the functional changes made through radical grafting on PCL to obtain the less hydrophobic derivatives, PCL-MA-GMA [maleic anhydride (MA)-glycidylmethacrylate (GMA)] and PCL-DMAEA [N-(dimethyl-amino)ethylacrylate]. In addition, we studied in vitro the biocompatibility and the osteogenic capacity of these novel polyesters on human bone marrow (BM) mesenchymal stem cells (MSC).
    Źródło:
    Engineering of Biomaterials; 2012, 15, 113; 13-15
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of curing temperature in the alkali-activated blast-furnace slag paste and their structural influence of porosity
    Autorzy:
    Medina-Serna, T. J.
    Arredondo-Rea, S. P.
    Gómez-Soberón, J. M.
    Rosas-Casarez, C. A.
    Corral-Higuera, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/103278.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    activation of geopolymers
    alternative materials
    concrete friendly
    curing temperature
    maturation of hydration
    Opis:
    Due to the environmental problem posed by the use of Portland cement as construction material, it becomes necessary the search for supplementary cementitious materials that mitigate the ecological damage caused by it. Because the chemical similarity and the high cementitious powers of the blast furnace slag, it is used in the generation of geopolymers in a cement total replacement. This research focused on the study of the influence of the curing conditions on the final properties of blast furnace slag establishing three variables: no cured process (N-C), cured of controlled temperature of 45°C (CT45-C) and room temperature cure (RT-C); evaluating the mechanical behavior until 28 days of age and the water porosity index. The results show that geopolymers based on blast furnace slag has a behavior similar to hydration maturity of Portland cement and curing process decreases the porosity; On the other hand, applying a controlled temperature generates densest resistant pastes such as the variable CT45-C which reach the highest value of resistance in all curing ages.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 31; 74-79
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    It’s embedded!? Modeling the Tenets of Critical Pedagogy for Future Teachers Working in Multilingual and Multicultural Learning Environments
    To jest zintegrowane!? modelowanie założeń pedagogiki krytycznej dla przyszłych nauczycieli.
    Autorzy:
    Muszyńska, Barbara
    Gómez-Parra, María Elena
    Powiązania:
    https://bibliotekanauki.pl/articles/2143796.pdf
    Data publikacji:
    2022-06-30
    Wydawca:
    Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej
    Tematy:
    opracowanie programów nauczania
    różnorodność językowa i kulturowa
    kształcenie wstępne nauczycieli
    pedagogika krytyczna
    critical pedagogy
    pre-service teacher training
    linguistic and cultural diversity
    curriculum development
    Opis:
    Learning means understanding of the positionality of the producers of knowledge and their power since it is them who reproduce a certain world view. If teacher education programs do not reflect issues faced by underrepresented populations, this may leave certain groups of students marginalized and cause higher drop-out rates. Hence, this study aimed to determine whether chosen Education Preparation Programs (EPPs) in Poland and Spain embed principles of critical pedagogy in their curriculum while preparing pre-service teachers for working in diverse educational environments. This study’s methodology was replicated from the analysis done by Courville-Mayers & Figueroa-Flores (2020). Content analysis was used to determine the presence of a critical pedagogy tenets developed by Giroux (revised in 2020) in the EPPs required courses’ syllabi. The findings show that the distribution of the CP principles is uneven and some of the tenets found no representation in the syllabi.
    Uczenie się oznacza zrozumienie pozycji władzy oraz istoty reprodukowania wiedzy, gdyż są one odzwierciedleniem powielanych społecznie światopoglądów. Jeśli programy kształcenia nauczycieli nie odzwierciedlają problemów, z jakimi borykają się niedostatecznie reprezentowane populacje, może to prowadzić do marginalizacji pewnych grup studentów i powodować wyższy odsetek osób porzucających naukę. Dlatego też niniejsze badanie miało na celu ustalenie, czy wybrane programy przygotowawcze dla nauczycieli w Polsce i Hiszpanii uwzględniają zasady pedagogiki krytycznej w swoich programach kształcenia, przygotowując nauczycieli do pracy w zróżnicowanych środowiskach edukacyjnych. Metodologia tego badania została powielona z analizy przeprowadzonej przez Courville-Mayers & Figueroa-Flores (2020), jako że jest to badanie replikacyjne. Analiza treści została wykorzystana do określenia obecności założeń pedagogiki krytycznej opracowanych przez Giroux (zrewidowanych w 2020 r.) w sylabusach przedmiotów podstawowych. Wyniki badań pokazują, że rozmieszczenie zasad pedagogiki krytycznej w programach kształcenia nauczycieli jest nierównomierne, a niektóre zadady nie znalazły żadnego odzwierciedlenia w sylabusach.
    Źródło:
    Forum Oświatowe; 2022, 34, 1(67); 11-21
    0867-0323
    2450-3452
    Pojawia się w:
    Forum Oświatowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    China’s “One Belt, One Road Initiative”: challenges and requirements for its successful implementation in Central Asia
    Chińska inicjatywa „jeden pas, jedna droga”: wyzwania i wymagania dotyczące jej skutecznego wdrożenia w Azji Środkowej
    Autorzy:
    Gómez Martos, Francisco
    Powiązania:
    https://bibliotekanauki.pl/articles/616304.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    One Belt
    One Road Initiative
    Silk Road Economic Belt and Central Asia
    Asian Infrastructure Investment Bank
    Eurasian Economic Community
    inicjatywa „jeden pas
    jedna droga”
    Ekonomiczny Pas Jedwabnego Szlaku i Azja Środkowa
    Bank Inwestycyjny Infrastruktury Azjatyckiej
    Eurazjatycka Wspólnota Gospodarcza
    Opis:
    Dwadzieścia pięć lat po rozwiązaniu byłego Związku Radzieckiego i ponownym zaistnieniu republik Azji Środkowej jako niezależnych państw region ten nadal jest sceną rywalizacji wielkich mocarstw (Rosji, Chin, Unii Europejskiej, USA, Indii, Japonii, Turcji i Iranu) konkurujących w swego rodzaju „nowej wielkiej grze”, mającej na celu zwiększenie wpływów geopolitycznych i gospodarczych w regionie. Trwające ukryte współzawodnictwo wyjaśniają jego geografia, zróżnicowane i bogate zasoby naturalne, takie jak ropa naftowa i gaz. Pomimo wspólnej przeszłości historycznej i kulturowej Azja Środkowa stanowi zrónicowany region o wieloetnicznej i wielojęzycznej strukturze oraz niskim stopniu integracji fizycznej, gospodarczej i handlowej. Brak wzajemnego zaufania, utrzymujące się napięcia dotyczące granic oraz wykorzystania i współużytkowania zasobów naturalnych, a także różne poziomy wyników gospodarczych stanowiły jak dotąd zagrożenie dla rozwoju prawdziwej współpracy regionalnej. W tym kontekście chińska inicjatywa OBOR (One Belt One Road – jeden pas, jedna droga), mająca na celu rozwój szybkiego transportu, teoretycznie mogłaby – w przypadku właściwej realizacji – poprawić połączenia międzyregionalne, rozwijając w ten sposób rynek Azji Centralnej oraz wspierając współpracę międzyrządową i kontakty międzyludzkie w regionie. Czy możemy w takim razie spodziewać się, że ambitna chińska inicjatywa OBOR zwiększy stabilność geopolityczną i pomoże uzyskać wspólne korzyści gospodarcze i handlowe w Azji Środkowej? Jakie są przesłanki, które należałoby spełnić? Autor szczegółowo analizuje pewne kluczowe wymagania polityczne, gospodarcze i instytucjonalne niezbędne w celu skutecznego wdrożenia strategii OBOR stwierdzając jednak, że trzy lata po uruchomieniu tego kluczowego instrumentu chińskiego modelu „globalizacji bez demokracji” jego wdrożenie stoi w obliczu poważnych problemów, budząc tym samym większe wątpliwości niż pewność.
    Twenty five years after the dissolution of the former Soviet Union and the reemergence of the Central Asian Republics as independent States, this region continues to be the scene of rivalries amongst the big powers (Russia, China, the European Union, USA, India, Japan, Turkey and Iran) competing in a sort of a “new Grand Game” to increase their geopolitical and economic influence in the region. Its geography, diverse and rich natural resources, like oil and gas, explain the ongoing hidden rivalries. Despite its common historical and cultural past, Central Asia constitutes a heterogeneous region with a multiethnic and multi-linguistic composition and a low degree of physical, economic and trade integration. The lack of mutual trust, the persisting tension over borders and the use and sharing of natural resources, as well as different levels of economic performance have so far jeopardized the development of genuine regional cooperation. Against this background, the idea behind the Chinese OBOR Initiative to develop rapid transportation, if well implemented, could theoretically, by improving interregional connectivity, develop the Central Asia regional market and foster intergovernmental cooperation and people-to-people contacts within the region. In this context, could we expect that the ambitious Chinese OBOR Initiative will boost geopolitical stability and promote shared economic and trade benefits in Central Asia? What are the conditions for that need to be fulfilled?The author analyzes in depth certain crucial political, economic and institutional requirements for the successful implementation of the OBOR Strategy and concludes, however, that three years after the launching of this crucial instrument of the Chinese “globalization without democracy” model, its implementation faces major problems and thus raises more doubts than certainties.
    Źródło:
    Przegląd Politologiczny; 2017, 3; 127-138
    1426-8876
    Pojawia się w:
    Przegląd Politologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CHINA’S “ONE BELT, ONE ROAD” INITIATIVE: PROSPECTS AND CHALLENGES
    CHIŃSKA INICJATYWA JEDNEGO PASA I JEDNEJ DROGI – WYZWANIA I PERSPEKTYWY
    Autorzy:
    Gómez Martos, Francisco
    Powiązania:
    https://bibliotekanauki.pl/articles/641871.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    One Belt
    One Road Initiative
    Silk Maritime Road
    Asian Infrastructure Investment Bank
    Eurasian Economic Community
    Transpacific Partnership Agreement
    Regional Comprehensive Economic Partnership
    Mega trade blocks
    European Union and China relations
    inicjatywa „Jeden pas i jedna droga”
    Morski Szlak Jedwabny
    Azjatycki Bank Inwestycji Infrastrukturalnych
    Euroazjatycka Wspólnota Gospodarcza
    Partnerstwo Transpacyficzne
    Regionalne Kompleksowe Partnerstwo Gospodarcze
    Mega bloki handlowe
    relacje Unia Europejska-Chiny
    chiński plan Marshalla
    Opis:
    Inicjatywa „Jeden pas i jedna droga” (One Belt One Road – OBOR) Prezydenta Xi Jinpin jest istotnym instrumentem strategii mającej na celu utrzymanie kontroli wewnętrznej i stabilności politycznej oraz zdynamizować schorzałą chińską gospodarkę. Koncepcja OBOR jest ambitna, ale niejednoznaczna, zgodna z tradycyjną chińską zasadą “Ukryj nasze możliwości i daj nam czas”. W tym kontekście pojawia się pytanie czy ChRL jest gotowa na przestrzeganie prawa międzynarodowego i na bycie przewidywalnym i odpowiedzialnym partnerem politycznym i handlowym? Autor analizuje perspektywy i wyzwania chińskiej strategii i stara się dociec jakie są rzeczywiste cele tego projektu, który może przynieść potencjalne korzyści, ale także stanowić poważne zagrożenie dla jej azjatyckich sąsiadów i całej społeczności międzynarodowej.
    The launching of “One Belt, One Road” (OBOR) Initiative by president Xi Jinpin is an essential instrument of the Strategy aiming to maintain the internal control and political stability and dynamises an ailing Chinese economy. The concept of OBOR is ambitious but ambiguous, perfectly in line with traditional Chinese pattern: “Hide our capabilities and bide our time.” In this context, a question is posed: Is China ready to abide by international law and be a reliable political and trade partner? The author analyzes the prospects and challenges of the Chinese Strategy and try to identify what are the real objectives of this project which may bring potential benefits but also important risks for its Asian neighbors and the international community at large.
    Źródło:
    Przegląd Strategiczny; 2017, 10; 321-334
    2084-6991
    Pojawia się w:
    Przegląd Strategiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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