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782. An American monograph on the protectorate
- Creator:
- Raška, Francis D.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
783. An annotated list of parasites (Isopoda, Copepoda, Monogenea, Digenea, Cestoda and Nematoda) collected in groupers (Serranidae, Epinephelinae) in New Caledonia emphasizes parasite biodiversity in coral reef fish
- Creator:
- Justine, Jean-Lou, Beveridge, Ian, Boxshall, Geoffrey A., Bray, Rod A., Moravec, František, Trilles, Jean-Paul, and Whittington, Ian D.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Isopoda, Copepoda, Monogenea, Digenea, Cestoda, Nematoda, Serranidae, Epinephelinae, parasite biodiversity, coral reef, and New Caledonia
- Language:
- English
- Description:
- Over a 7-year period, parasites have been collected from 28 species of groupers (Serranidae, Epinephelinae) in the waters off New Caledonia. Host-parasite and parasite-host lists are provided, with a total of 337 host-parasite combinations, including 146 parasite identifications at the species level. Results are included for isopods (5 species), copepods (19), monogeneans (56), digeneans (28), cestodes (12), and nematodes (12). When results are restricted to those 14 fish species for which more than five specimens were examined and to parasites identified at the species level, 109 host-parasite combinations were recorded, with 63 different species, of which monogeneans account for half (32 species), and an average of 4.5 parasite species per fish species. Digenean records were compared for 16 fish species shared with the study of Cribb et al. (2002); based on a total of 90 parasite records identified at the species level, New Caledonia has 17 new records and only seven species were already known from other locations. We hypothesize that the present results represent only a small part of the actual biodiversity, and we predict a biodiversity of 10 different parasite species and 30 host-parasite combinations per serranid. A comparison with a study on Heron Island (Queensland, Australia) by Lester and Sewell (1989) was attempted: of the four species of fish in common and in a total of 91 host-parasite combinations, only six parasites identified at the species level were shared. This suggests strongly that insufficient sampling impairs proper biogeographical or ecological comparisons. Probably only 3% of the parasite species of coral reef fish are already known in New Caledonia.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
784. An application of dimensional model theory in the determination of the deformation of a structure
- Creator:
- Száva, Ioan, Szirtes, Thomas, and Dani, Péter
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- dimensional analysis, model law, prototype, model, displacement, and reticular structure
- Language:
- English
- Description:
- This paper presents an adroit utilization of dimensional analysis-based model theory by which the deformation of a structure - however complex - can be elegantly and easily obtained. The structure is loaded by a concentrated lateral load of arbitrary location and magnitude. The relevant technique is outlined in some details; therefore the reader is advised to follow the presented routine closely. By doing so, he will be impressed by the prowees and economy of the described process. In the Preamble, the more important relevant theorems and relations - without proofs - are given in greatly condensed forms. This summary will help the reader to understand the subsequent application presented. Full treatment of the theories and practice of applied dimensional model theory can be found in [1], which the interested and motivated reader is advised to consult. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
785. An arduous road of the exile toward the fall of the Iron Curtain
- Creator:
- Nekola, Martin
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Description:
- Autor recenze: Martin Nekola
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
786. An automated microinfiltrometer to measure small-scale soil water infiltration properties
- Creator:
- Gordon, Dennis C. and Hallett, Paul D.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- tension infiltrometer, water sorptivity, automated measurements, and small-scale infiltration measurements
- Language:
- Slovak
- Description:
- We developed an automated miniature constant-head tension infiltrometer that measures very small infiltration rates at millimetre resolution with minimal demands on the operator. The infiltrometer is made of 2.9 mm internal radius glass tube, with an integrated bubbling tower to maintain constant negative head and a porous mesh tip to avoid air-entry. In the bubbling tower, bubble formation and release changes the electrical resistance between two electrodes at the air-inlet. Tests were conducted on repacked sieved sands, sandy loam soil and clay loam soil, packed to a soil bulk density ρd of 1200 kg m-3 or 1400 kg m-3 and tested either air-dried or at a water potential ψ of -50 kPa. The change in water volume in the infiltrometer had a linear relationship with the number of bubbles, allowing bubble rate to be converted to infiltration rate. Sorptivity measured with the infiltrometer was similar between replicates and showed expected differences from soil texture and ρd, varying from 0.15 ± 0.01 (s.e.) mm s-1/2 for 1400 kg m-3 clay loam at ψ = -50 kPa to 0.65 ± 0.06 mm s-1/2 for 1200 kg m-3 air dry sandy loam soil. An array of infiltrometers is currently being developed so many measurements can be taken simultaneously.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
787. An effective solution of the composite (FMG'S) beam structures
- Creator:
- Murín, Justín and Kutiš, Vladimír
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- composite beam finite element, sandwich beam, functionally graded materials, and mixture rules
- Language:
- English
- Description:
- The additive mixture rules have been extended for calculation of the effective longitudinal elasticity modulus of the composite (Functionally Graded Materials - FGM's) beams with both the polynomial longitudinal variation of the constituent's elasticity modulus. Stiffness matrix of the composite Bernoulli-Euler beam has been established which contains the transfer constants. These transfer constants describe very accurately the polynomial uni-axially variation of the effective longitudinal elasticity modulus, which is calculated using the extended mixture rules. The mixture rules have been extended for calculation of the effective elasticity modulus for stretching and flexural bending of the layer-wise symmetric composite (FGM's) sandwich beam finite element as well. The polynomial longitudinal and transversally symmetric layer-wise variation of the sandwich beam stiffness has been taken into the account. Elastic behaviour of the sandwich beam will be modelled by the laminate theory. Stiffness matrix of such new sandwich beam element has been established. The nature and quality of the matrix reinforcement interface have not been considered. Four examples have been solved using the extended mixture rules and the new composite (FGM's) beam elements with varying stiffness. The obtained results are evaluated, discussed and compared. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
788. An efficient hp spectral collocation method for nonsmooth optimal control problems
- Creator:
- Hedayati, Mehrnoosh, Ahsani Tehrani, Hojjat, Fakharzadeh Jahromi, Alireza, Noori Skandari, Mohammad Hadi, and Baleanu, Dumitru
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- nonsmooth optimal control, hp-method, Lagrange interpolating polynomials, and Legendre-Gauss-Lobatto points
- Language:
- English
- Description:
- One of the most challenging problems in the optimal control theory consists of solving the nonsmooth optimal control problems where several discontinuities may be present in the control variable and derivative of the state variable. Recently some extended spectral collocation methods have been introduced for solving such problems, and a matrix of differentiation is usually used to discretize and to approximate the derivative of the state variable in the particular collocation points. In such methods, there is typically no condition for the continuity of the state variable at the switching points. In this article, we propose an efficient hp spectral collocation method for the general form of nonsmooth optimal control problems based on the operational integration matrix. The time interval of the problem is first partitioned into several variable subintervals, and the problem is then discretized by considering the Legendre-Gauss-Lobatto collocation points. Here, the switching points are unknown parameters, and having solved the final discretized problem, we achieve some approximations for the optimal solutions and the switching points. We solve some comparative numerical test problems to support of the performance of the suggested approach.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
789. An enhanced cAMP pathway is responsible for the colonic hyper-secretory response to 5-HT in acute stress rats
- Creator:
- Li, Y., Li, L. S., Zhang, X. L., Zhang, Y., Xu, J. D., and Zhu, J. X.
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, tračník, stres (fyziologie), colon, stress (physiology), 5-hydroxytryptamine, ion transport, cAMP, 14, and 612
- Language:
- English
- Description:
- 5-hydroxytryptamine (5-HT) is involved in the stress-induced alteration of colonic functions, specifically motility and secretion, but its precise mechanisms of regulation remain unclear. In the present study, we have investigated the effects of 5-HT on rat colonic mucosal secretion after acute water immersion restraint stress, as well as the underlying mechanism of this phenomenon, using short circuit current recording (ISC), real-time polymerase chain reaction, Western blot analysis, and enzyme-linked immunosorbance assays. After 2 h of water immersion restraint stress, the baseline ISC and 5-HT-induced ISC responses of the colonic mucosa were significantly increased. Pretreatment with selective 5-HT4 receptor antagonist, SB204070, inhibited the 5-HT-induced colonic ISC response by 96 % in normal rats and 91.2 % in acute-stress rats. However, pretreatment with the selective antagonist of 5-HT3 receptor, MDL72222 or Y-25130, had no obvious effect on 5-HT-induced ISC responses under either set of conditions. Total protein expression of both the mucosal 5-HT3 receptors and the 5-HT4 receptors underwent no significant changes following acute stress. Both colonic basal cAMP levels and foskolin-induced ISC responses were significantly enhanced in acute stress rats. 5-HT significantly enhanced the intracellular cAMP level via 5-HT4 receptors in the colonic mucosa from both control and stressed animals, and 5-HT-induced cAMP increase in stressed rats was not more than that in control rats. Taken together, the present results indicate that acute water immersion restraint stress enhances colonic secretory responses to 5-HT in rats, a process in which increased cellular cAMP accumulation is involved., Y. Li, L. S. Li, X. L. Zhang, Y. Zhang, J. D. Xu, J. X. Zhu., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
790. An equivalence between rational inattention problems and complete-information conformity games
- Creator:
- Ilinov, Pavel, Jann, Ole, Jeong, Byeongju, Univerzita Karlova. Centrum pro ekonomický výzkum a doktorské studium, and Národohospodářský ústav (Akademie věd ČR)
- Publisher:
- CERGE-EI
- Format:
- electronic, electronic resource, remote, bez média, online zdroj, and 10 stran
- Type:
- model:monograph and TEXT
- Subject:
- Kombinatorika. Teorie grafů. Matematická statistika. Operační výzkum. Matematické modelování, teorie her, optimální rozhodování, sociální normy, game theory, optimal decision theory, social norms, racionální nepozornost, 519.83, 519.816, 316.754, (0.034.2:08), (048.8), 13, and 519.1/.8
- Language:
- English and Czech
- Description:
- Pavel Ilinov, Ole Jann., Obsahuje bibliografii a bibliografické odkazy, České a anglické resumé, and born digital
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public