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Wyszukujesz frazę "Martinez, J.M." wg kryterium: Autor

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Wyświetlanie 1-15 z 40
Tytuł:
The role of mutagenesis in the modification of the fatty acid profile of oilseed crops
Autorzy:
Velasco, L
Perez-Vich, B.
Fernandez-Martinez, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/2043643.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oil seed
mutagenesis
induced mutation
fatty acid
crop
modification
Źródło:
Journal of Applied Genetics; 1999, 40, 3; 185-209
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Competition and critical periods in spring sugar beet cultivation
Autorzy:
Martinez, J.M.
de Juan Valero, J.-A
Padilla, A.D.
Picornell Buendia, M.-R.
Powiązania:
https://bibliotekanauki.pl/articles/66152.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
competition
critical period
spring sugar-beet
sugar-beet
plant cultivation
weed
irrigation
yield
Opis:
High yields with low costs require that sugar beets be kept free of weeds, during critical periods, using labor or chemical treatments. Since the critical periods for this crop in Castilla – La Mancha (Spain) are unknown, the first goal of this study was to determine the effect of early and late competition on yield. The second goal was to determine the critical periods, while taking into consideration the semiarid climatic conditions of this region. Two irrigation farms located in the province of Albacete are dedicated to sugar beet cultivation. These two farms were chosen to carry out the tests March (140,000–150,000 seeds ∙ ha–1) and harvested in October. Two simultaneous and complementary experiments were carried out in each year and farm. Two scenarios were considered with eight different treatments each. In the first one (With Weeds Until – WWU), plots were infested by weeds up to a certain date. In the second one (Free of Weeds Until – FWU), plots were kept free of weeds up to a certain date. For each test, a randomised experimental blocked field was designed and there were four repetitions, each of them containing eight elemental plots (12 m2). Each plot was weeded by hand or weeds were left to grow till a definite date.The results indicated that a 1% loss of yield was reached in the early competition after 14 days, while a loss of 5% was reached after a period of 41 days after it was infested. The results also indicated that in late competition, if a crop is kept clean for 124 days and it is infested afterwards, a 1% loss is reached. However, the loss increases to 5% if the plot is kept clean for 111 days. For a 1% loss the critical period is 110 days and 70 days for a 5% loss.
Źródło:
Journal of Plant Protection Research; 2015, 55, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GNSS technologies for electronic toll collection
Autorzy:
Martinez Olague, M. A.
Cosmen-Schortmann, J.
Powiązania:
https://bibliotekanauki.pl/articles/393918.pdf
Data publikacji:
2008
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
elektroniczny pobór opłat
opłaty drogowe
GPS
telematyka
electronic toll collection
road pricing
telematics
Opis:
Problems with infrastructure financing, pollution and congestion are leading different countries to the implementation of Road Pricing schemes. GNSS appears as one of the most flexible and cost efficient technologies for the implementation of large ETC systems. However, due to the nature of GNSS with random and occasionally large position errors, GNSS based ETC still has some constraints that need to be overcome. The use of a signal with guaranteed integrity, as the one available in WAAS or EGNOS combined with advanced OBU algorithms provides an efficient solution that guarantees the correctness of the charging. This paper presents the results of the trials in which this technology has been used and demonstrates how the probability of overcharging can be controlled and dramatically reduced in a GNSS-only system. These trials have been executed in London, Madrid and The Netherlands.
Źródło:
Archives of Transport System Telematics; 2008, 1, 1; 68-72
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-channel X-ray detection head for diagnostics of plasma in noisy environment
Autorzy:
Ryć, L.
Kaczmarczyk, J.
Martinez, J. F.
Scholz, M.
Słysz, M.
Powiązania:
https://bibliotekanauki.pl/articles/148717.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature plasma
semiconductor detector
X-ray diagnostics
Opis:
A compact, three-channel, noise-resistant detection head based on semiconductor detectors has been built for the diagnostics of X-ray emission from plasmas. It is useful in the energy range of 0.5–20 keV.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 95-97
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grain discoloration in different genotypes of durum wheat (Triticum durum L.) in Argentina: associated mycobiota and peroxidase activity
Autorzy:
Cipollone, M.J.
Moya, P.
Martinez, I.
Saparrat, M.
Sisterna, M.
Powiązania:
https://bibliotekanauki.pl/articles/2084746.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
durum wheat
grain discoloration
mycobiota
peroxidase activity
Opis:
Wheat grain discoloration, a worldwide disease that lowers grain quality and decreases grain yield, does not have a single etiology. It has been proposed that it is a consequence of an abiotic mechanism, a response to environmental conditions or enzymatic activity. It has also been suggest that it is a biotic mechanism, a fungal infection principally by Alternaria spp. and Bipolaris sorokiniana. The present work was carried out to analyze the possible etiology of this disease in nine durum wheat genotypes from two localities of southern Buenos Aires province (Argentina) on two sowing dates. Incidence (percentage of grain discoloration) was recorded and mycobiota associated with this pathology was registered following ISTA rules. Peroxidase activity in an extract obtained from grains belonging to genotypes of the locality that showed the highest incidence was measured. The incidence among genotypes, localities and sowing dates varied, although the genotypes with the higher and lower values of incidence were the same for all the variables tested. The fungus Alternaria spp. was isolated the most frequently followed by Fusarium spp., while Bipolaris sorokiniana was found the least frequently. Peroxidase activity showed that all the treatments had similar levels of enzymatic activity, but there was no clear differentiation between controls either between genotypes with the lowest or the highest incidence values. This suggests that peroxidase activity did not have a clear relationship with grain discoloration. In this research, it is presumed that fungal infection is the main cause of this disease.
Źródło:
Journal of Plant Protection Research; 2020, 60, 1; 14-20
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaporation of magnetically treated water and NaCl solutions
Autorzy:
Carbonell, M.V.
Martinez, E.
Diaz, J.E.
Powiązania:
https://bibliotekanauki.pl/articles/26429.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
evaporation
physicochemical property
solution
magnetic treatment
sodium chloride
water change
water
magnetohydrodynamics
Źródło:
International Agrophysics; 2002, 16, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability-based economic model predictive control for generalised flow-based networks including actuators’ health-aware capabilities
Autorzy:
Grosso, J. M.
Ocampo-Martinez, C.
Puig, V.
Powiązania:
https://bibliotekanauki.pl/articles/330080.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
model predictive control
flow based network
dynamic safety stocks
actuator health
service reliability
chance constraints
economic optimisation
sterowanie predykcyjne
niezawodność serwisu
optymalizacja ekonomiczna
Opis:
This paper proposes a reliability-based economic model predictive control (MPC) strategy for the management of generalized flow-based networks, integrating some ideas on network service reliability, dynamic safety stock planning, and degradation of equipment health. The proposed strategy is based on a single-layer economic optimisation problem with dynamic constraints, which includes two enhancements with respect to existing approaches. The first enhancement considers chance-constraint programming to compute an optimal inventory replenishment policy based on a desired risk acceptability level, leading to dynamical allocation of safety stocks in flow-based networks to satisfy non-stationary flow demands. The second enhancement computes a smart distribution of the control effort and maximises actuators’ availability by estimating their degradation and reliability. The proposed approach is illustrated with an application of water transport networks using the Barcelona network as the case study considered.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 3; 641-654
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growing the endangered species Astragalus nitidiflorus in the nursery: fertilization rate affects growth, and leaf nutrient and chlorophyll contents
Autorzy:
Vicente, M.J.
Martínez-Sánchez, J.J.
Franco, J.A.
Bañón, S.
Powiązania:
https://bibliotekanauki.pl/articles/11858781.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Spain
plant cultivation
Astragalus nitidiflorus
endangered species
endemic plant
plant growth
leaf nutrient content
chlorophyll content
fertilization rate
nodulation
Opis:
Astragalus nitidiflorus is an endangered legume endemic to the southeast of the Iberian Peninsula. This species develops symbiotic relationships with N-fixing bacteria. However, the problem of isolating its rhizobia has not been solved. Because poor N fixation in plants can be corrected by fertilization, the effect of N-P-K fertilizers on growth, leaf chlorophyll and mineral ions was studied. Plants of A. nitidiflorus were grown in 100%-substrate with different N-P-K fertilizer rates (mg l–1): 1-1-8 (S0), 69-29-35 (SL), 144-43-131 (SM) and 245-58-235 (SH). A treatment with substrate plus soil from the natural habitat and no fertilizers (T0) was included. The reference foliar contents of N, P and K were 42.5, 3.5 and 36.5 mg g–1, respectively. Although the species did not form root nodules when grown in substrate, T0 plants produced active nodules that allowed the plants to grow properly without fertilization. In the absence of nodules, both N fertilization (~144 mg l–1) and Fe fertilization (>12 mg l–1) are vital, as is, to a lesser extent, K fertilization (~75 mg l–1 K2O). The S0 and SL reduced leaf chlorophyll, while SM prevented its degradation.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 4; 129-136
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balancing Offshoring and Agility in the Apparel Industry: Lessons From Benetton and Inditex
Offshoring w przemyśle odzieżowym na przykładzie firm Benetton i Inditex
Autorzy:
Sartal, A.
Martínez-Senra, A. I.
García, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/233843.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
offshoring
agility
apparel industry
organizational innovation
time to market
przemysł odzieżowy
innowacje organizacyjne
cykl produkcyjny
Opis:
Based on a case study from the apparel industry, the paper addresses how the organizational innovations adopted by Benetton and Inditex allowed them to balance lower production costs in developing countries with an adequate response time to frequent preference changes and increasing demands for customisation. Findings confirm the fragility of multinationals whose offshoring strategy has not considered the costs of coordinating suppliers in far-off locations and suggest organisational improvements that make production costs, variety and time to market goals compatible. Our research thus provides a view of the conditions and processes that can overcome in increasingly volatile environments the misalignment between demand changes and the limited reactivity of industrial infrastructures. Furthermore the innovation strategy of textile companies has created generalizable lessons for other sectors in which demand uncertainty is high, life cycles short, and customers are, to some extent, prepared to pay for “speed to market”.
Na podstawie studium przypadku z branży odzieżowej w artykule przedstawiono, w jaki sposób innowacje organizacyjne przyjęte przez firmy Benetton i Inditex pozwoliły na obniżenie kosztów produkcji w krajach rozwijających się z zachowaniem odpowiedniego czasu reakcji na częste zmiany preferencji i rosnące wymagania klientów. Wyniki potwierdzają niestabilność firm międzynarodowych, których strategia offshoringowa nie uwzględniała kosztów koordynacji dostawców. Przeprowadzone badania pozwalają wskazać rozwiązania problemów, z którymi borykają się firmy działające w specyficznych warunkach częstej zmiany popytu i ograniczonej reaktywności infrastruktury przemysłowej. Ponadto strategia innowacyjna firm tekstylnych może być przykładem dla innych sektorów, w których panuje równie wysoka niepewność popytu i krótki cykl życia produktu.
Źródło:
Fibres & Textiles in Eastern Europe; 2017, 2 (122); 16-23
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scale effects on sediment yield from badland areas in Mediterranean environments
Autorzy:
Martínez-Murillo, J. F.
Nadal-Romero, E.
Vanmaercke, M.
Poesen, J.
Powiązania:
https://bibliotekanauki.pl/articles/294681.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
badlands
sediment yield
drainage area
spatial scale
Opis:
This study investigates area-specific Sediment Yield (SY) in Mediterranean badland areas at different spatial scales using a SY-database compiled from scientific literature. Relationships between the plot and catchment characteristics and the corresponding SY-data are analyzed. Results indicate that in Mediterranean environments SY is larger than in other environments,especially in badlands where a high variability of SY is observed depending on the spatial scale. In intensively gullied badlands,a complex plot or drainage area (A) -SY relationship is observed: for A ranging between 10-5 and 10 ha,SY is very high (mean SY equals 475 t ha-1 yr-1),whereas for A greater than 10 ha,SY decreases with increasing A (mean SY less than 100 t ha-1 yr-1).
Źródło:
Landform Analysis; 2011, 17; 105-109
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the effects of land use changes on runoff and soil erosion in two Mediterranean catchments with active gullies (South of Spain)
Autorzy:
Martínez-Murillo, J. F.
López-Vicente, M.
Poesen, J.
Ruiz-Sinoga, J. D.
Powiązania:
https://bibliotekanauki.pl/articles/294673.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully erosion
land use
RMMF
model
runoff
soil erosion
Opis:
This study investigates the effects of land use changes between 1956 and 2006 on runoff and soil erosion in two Mediterranean catchments (South Spain)with active gullies, by applying the RMMF Model and by comparing the erosion channel network from both years. Results underline the complexity of soil erosion dynamics in gullied catchments where a general increase in soil erosion due to land use changes can occur simultaneously with a decrease in erosion rates within the gully system.
Źródło:
Landform Analysis; 2011, 17; 99-104
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal design of membership functions of a fuzzy logic controller for an autonomous wheeled mobile robot using ant colony optimization
Autorzy:
Martínez, P.
Castillo, O.
Alanis, A.
Garcia, M.
Soria, J.
Powiązania:
https://bibliotekanauki.pl/articles/384537.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
fuzzy control
ant colony optimization
autonomous mobile robots
Opis:
In this paper we describe the application of a Simple ACO (S-ACO) as a method of optimization for membership functions' parameters of a fuzzy logic controller (FLC) in order to find the optimal intelligent controller for an Autonomous Wheeled Mobile Robot. Simulation results show that ACO outperforms a GA in the optimization of FLCs for an autonomous mobile robot.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 43-48
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BIBO stabilisation of continuous-time Takagi–Sugeno systems under persistent perturbations and input saturation
Autorzy:
Salcedo, J. V.
Martínez, M.
García-Nieto, S.
Hilario, A.
Powiązania:
https://bibliotekanauki.pl/articles/330698.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
linear matrix inequalities
fuzzy system
nonlinear system
input saturation
disturbance
liniowe nierówności macierzowe
układ rozmyty
układ liniowy
nasycenie wejściowe
Opis:
This paper presents a novel approach to the design of fuzzy state feedback controllers for continuous-time non-linear systems with input saturation under persistent perturbations. It is assumed that all the states of the Takagi–Sugeno (TS) fuzzy model representing a non-linear system are measurable. Such controllers achieve bounded input bounded output (BIBO) stabilisation in closed loop based on the computation of inescapable ellipsoids. These ellipsoids are computed with linear matrix inequalities (LMIs) that guarantee stabilisation with input saturation and persistent perturbations. In particular, two kinds of inescapable ellipsoids are computed when solving a multiobjective optimization problem: the maximum volume inescapable ellipsoids contained inside the validity domain of the TS fuzzy model and the smallest inescapable ellipsoids which guarantee a minimum *-norm (upper bound of the 1-norm) of the perturbed system. For every initial point contained in the maximum volume ellipsoid, the closed loop will enter the minimum *-norm ellipsoid after a finite time, and it will remain inside afterwards. Consequently, the designed controllers have a large domain of validity and ensure a small value for the 1-norm of closed loop.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 457-472
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impurity-Related Nonlinear Optical Absorption in Delta-Doped Quantum Rings
Autorzy:
Restrepo, R.
Martínez-Orozco, J.
Barseghyan, M.
Mora-Ramos, M.
Duque, C.
Powiązania:
https://bibliotekanauki.pl/articles/1195152.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.-k
73.21.-b
78.67.-n
Opis:
Using a variational procedure within the effective mass approximation, we have calculated the hydrogenic impurity binding energy as well as the impurity-related nonlinear optical absorption in a single quantum ring with axial n-type delta-doping. The delta-like potential along the z-direction is analytically modeled with a Hartree-like confining profile fitted to a one-dimensional Thomas-Fermi-based potential in the local density approximation. Both on-center and on-edge impurity positions are considered and the energies of the impurity states are examined as functions of the vertical size of the ring. It is found that the effect of changes in the geometry of the quantum ring leads to a shifting of the resonant peaks of the intra-band optical spectrum.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 245-247
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 40

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