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EN
The aim of the study was to determine the eect of magnesium sulphate and carbonate on the germination and growth of cucumber seeds (Cucumis sativus L.). For the experiment was used (1) Kottke et al. (1987) medium (pH 5.4) and its modification: (2) Kottke medium with the addition of MgSO4×7H2O (pH 4.8), (3) Kottke medium with the addition of MgCO3×3H2O (pH 6.5) and (4) distilled water (control). Characterisation of the germination capacity of cucumber seeds, under the influence of Kottke medium and its modification, were measured by germination indexes. An attempt was also made to assess the eect of mediums on growth on the length of plants, fresh and dry mass and water content. Germination indexes showed that the presence of magnesium carbonates and sulphates slightly inhibited seed germination, compared to the control. Biometric analysis of C. sativus roots showed a stimulating effect of mediums regardless of the time of watering the plants. Compared to the control, the length of hypocotyl was inhibited in the presence of the magnesium and sulphates ions. Thee highest growth of cucumber stalks in plants watered with mediums supplemented with magnesium salts for all time of experiment was observed. The petiole growth in length was stimulated by all modifications of Kottke medium. Fresh mass values, regardless of the type of medium and the time of its use, were higher in relation to the mass values from the control sample. Only the fresh mass of hypocotyl from plants watered throughout the experiment with magnesium salts was lower compared to the control. For all tested C. sativus organs an increase in the dry mass value was demonstrated. The percentage of water content was the lowest for roots and first leaves compared to the control.
EN
An analysis is presented is to study the beat and mass transfer characteristics of natural convection flow about a truncated cone embedded in a saturated porous medium with uniform surface temperature/concentration under the combined buoyancy effects thermal and mass diffusion. The transformed governing equations are solved by Keller box method. Numerical results for dimensionless temperature and concentration; the local Nuss elt (Sherwood) numbers are presented over a wide range of dimensionless distance ξ, Lewis number Le, buoyancy ratio N and the wall to ambient viscosity ratio v∗. It has been found that the local Nusselt number and Sherwood number decrease with decreasing the wall to ambient viscosity ratio v∗. Furthermore, it is shown that the local Nusselt (Sherwood) numbers of the truncated cone approach those of inclined plate (full cone) for the case of constant viscosity at ξ = 0 (ξ → ∞).
EN
The basic dimensions and the mass of common beech nuts and seeds from five nut batches, harvested from tree stands in northern Poland, were determined. Environmental conditions had a greater influence on seed plumpness than the age of tree stands. The results of measurements were analyzed statistically by analysis of variance, correlation analysis and linear regression analysis. Despite differences in their plumpness, nuts were characterized by nearly identical cross-sections which resembled an equilateral triangle. The thickness of nuts and seeds was highly correlated with their mass, and this information can facilitate seed husking and separation into mass categories. Before and after husking, seeds should be separated with the use of a mesh screen with longitudinal openings. Medium-sized (most numerous) seeds were separated into the following plumpness categories using a screen separator with ≠6 mm and ≠7 mm openings: 84% of moderately plump seeds, 3% of seeds with reduced plumpness, and 13% of plump seeds.
EN
One of the most important parameters affecting traction properties as well as driving safety, especially with regard to vehicles with special purpose, is the distribution of wheel and axle loads on the ground. This issue should be taken into account during the process of creating new vehicles as well as during the modernization process. In the first case, it is quite simple because the mass distribution is shaped already in the design phase. In the second case, the problem is more complex, because with modernization solutions we enter an already existing structure. Modernization basically assumes improving the performance and capabilities of the vehicle with possibly small changes in its base structure. Thus, it imposes important boundary conditions. The article presents the methodology of measurement and selected results of measurements of mass distribution as well as wheel and axle loads of selected motor vehicles during their advanced modernization (STAR 266 cars to the version STAR 266M2 and Honker 2000 to the version Honker M-AX). Modernizations carried out by Autobox Innovations Ltd. Lim. Par are mainly focused on increasing the traction of vehicles, traffic safety, and driving comfort. Measurements were made at the above-mentioned company.
EN
The aim of the article is to bridge the gap in the study of Nicolaus de Radom’s output by presenting a comparative analysis of his works as juxtaposed with other European artists. The prevailing opinion of musicologists, such as Maria Szczepańska and Mirosław Perz, is that Nicolaus de Radom’s music is closely related to the worksof northern Italian composers. However, such a claim has not yet been supported with the detailed comparative analysis. The article presents the analysis of the manuscripts of Kras 52 and Wn 378, signed by Nicolaus de Radom, confronted with selected masses by Johannes Ciconia and Antonio Zacara da Teramo. A detailed analysis of a two-sectioned cyclic mass helps to distinguish certain similarities and differences in the unification of the Mass pairs, as they are exemplified in the music of the composers. The works of all of the three artists manifest secular songs’ influence on the shaping of the Mass as a genre, although each composer adapts it in a slightly different way. Moreover, it is stated that a thorough analysis of the 15th-century Masses is necessary to determine whether there are any links between Nicolaus de Radom, Antonio Zacara da Teramo and Johannes Ciconia’s works, and whether there are any similarities in their compositional technique. Presented analysis of de Radom, Zacara da Teramo and Ciconia’s Masses refutes the claim that Nicolaus de Radom’s output bears closest relation to those of Zacara da Teramo’s. The results of the study reveal that there are no straightforward examples which would support such a theory.
EN
Measuring the linear characteristics of chironomid larvae is easier and faster than measuring their mass. The relationships between them are approximated by parabolic equations. Generalized equations are provided for all chironomid larvae. However, these relations vary in different water bodies. Measurements of 1424 chironomid larvae representing several species were taken in Crimean waters with salinity ranging from 0 to 280 PSU. There was a high correlation between three traits. In the case of Baeotendipes noctivagus and Cricotopus gr. sylvestris, dimorphism was found in the “head capsule length– width” relationship. Salinity affects the head capsule. The exponent “b” varied from 1.43 to 3.06 in the “body length-mass” equation for B. noctivagus, and from 1.943 to 2.592 for C. gr. sylvestris. It is inappropriate to use only one coefficient “b” for all chironomid larvae. In B. noctivagus and Paratanytarsus confuses, the mass of one-size larvae decreased with increasing salinity. Salinity is not the only factor affecting the size and mass of chironomid larvae.
EN
Methods for constructing masas in the Calkin algebra without assuming the Continuum Hypothesis are developed.
EN
Introduction: Acute appendicitis is the most common surgical emergency in children. Appendicular mass is a relatively common complication in improperly treated patients. The management of appendicular mass remains controversial. Aim: This study aims at determining factors affecting the effectiveness of conservative management of appendicular mass. Material and methods: This was a retrospective study of 71 children younger than 15 years with appendicular mass managed at Basra Children’s Specialty Hospital during the period between 2015 and 2019. Factors like age of the patient, duration of symptoms prior to hospital admission, size of the mass, complications, hospital stay and outcome are reviewed. Results: Appendicular mass complicates 3.9% of all cases of acute appendicitis. Conservative management of appendicular mass was effective in 84.5%. Appendicular mass occurred most frequently in children aged 5–10 years (48%). Male is more frequently affected than female with a ratio of 1.4. Regarding age effect on the efficacy of conservative management of appendicular mass, there is a significant association with P-value = 0.017. Duration of symptoms or size of the mass has no significant association with the success of conservative management. No mortality or major surgical complications are encountered. Although effective, conservative management prolongs the length of hospital stay. Conclusion: Conservative management of appendicular mass in children should be revised particularly in children younger than 5 years old, wherein operative treatment may be the first option. The reasons for that are high rate of failure of conservative management with early progress to appendicular abscess. These could be explained by the underdevelopment of the greater omentum lacking its protective effect in limiting the spread of inflammation. In addition, early appendectomy has the following advantages: decreased risk of adhesive intestinal obstruction, shortening of hospital stay (i.e, less economic burden), and avoidance of second readmission for interval appendectomy
EN
The aim of the article is to bridge the gap in the study of Nicolaus de Radom’s output by presenting a comparative analysis of his works as juxtaposed with other European artists. The prevailing opinion of musicologists, such as Maria Szczepańska and Mirosław Perz, is that Nicolaus de Radom’s music is closely related to the works of northern Italian composers. However, such a claim has not yet been supported with the detailed comparative analysis. The article presents the analy¬sis of the manuscripts Kras 52 and Wn 378, signed by Nicolaus de Radom, confronted with selected masses by Johannes Ciconia and Antonio Zacara da Teramo. A detailed analysis of a two-sectioned cyclic mass helps to distinguish certain similarities and differences in the unification of the Mass pairs, as they are exemplified in the music of the composers. The works of all of the three artists manifest secular songs’ influence on the shaping of the Mass as a genre, although each composer adapts it in a slightly different way. Moreover, it is stated that a thorough analysis of the 15th-century Masses is necessary to determine whether there are any links between Nicolaus de Radom’s, Antonio Zacara da Teramo’s and Johannes Ciconia’s works, and whether there are any similarities in their compositional technique. Presented analysis of de Radom’s, Zacara da Teramo’s and Ciconia’s Masses refutes the claim that Nicolaus de Radom’s output bears closest relation to those of Zacara da Teramo’s. The results of the study reveal that there are no straightforward examples which would support such a theory.
EN
We consider a bounded domain Ω of [formula],[formula] h and b continuous functions on Ω. Let Γ be a closed curve contained in Ω. We study existence of positive solutions [formula] to the perturbed Hardy-Sobolev equation: [formula] where [formula] is the critical Hardy-Sobolev exponent [formula] and [formula] is the distance function to Γ. We show that the existence of minimizers does not depend on the local geometry of Γ nor on the potential h. For N = 3, the existence of ground-state solution may depends on the trace of the regular part of the Green function of —Δ + h and or on b. This is due to the perturbative term of order 1 + δ.
11
Content available remote Origins of mass
88%
Open Physics
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2012
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tom 10
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nr 5
1021-1037
EN
Newtonian mechanics posited mass as a primary quality of matter, incapable of further elucidation. We now see Newtonian mass as an emergent property. That mass-concept is tremendously useful in the approximate description of baryon-dominated matter at low energy - that is, the standard “matter” of everyday life, and of most of science and engineering - but it originates in a highly contingent and non-trivial way from more basic concepts. Most of the mass of standard matter, by far, arises dynamically, from back-reaction of the color gluon fields of quantum chromodynamics (QCD). Additional quantitatively small, though physically crucial, contributions come from the intrinsic masses of elementary quanta (electrons and quarks). The equations for massless particles support extra symmetries - specifically scale, chiral, and gauge symmetries. The consistency of the standard model relies on a high degree of underlying gauge and chiral symmetry, so the observed non-zero masses of many elementary particles (W and Z bosons, quarks, and leptons) requires spontaneous symmetry breaking. Superconductivity is a prototype for spontaneous symmetry breaking and for mass-generation, since photons acquire mass inside superconductors. A conceptually similar but more intricate form of all-pervasive (i.e. cosmic) superconductivity, in the context of the electroweak standard model, gives us a successful, economical account of W and Z boson masses. It also allows a phenomenologically successful, though profligate, accommodation of quark and lepton masses. The new cosmic superconductivity, when implemented in a straightforward, minimal way, suggests the existence of a remarkable new particle, the so-called Higgs particle. The mass of the Higgs particle itself is not explained in the theory, but appears as a free parameter. Earlier results suggested, and recent observations at the Large Hadron Collider (LHC) may indicate, the actual existence of the Higgs particle, with mass m H ≈ 125 GeV. In addition to consolidating our understanding of the origin of mass, a Higgs particle with m H ≈ 125 GeV could provide an important clue to the future, as it is consistent with expectations from supersymmetry.
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nr 1(32)
29-58
EN
The aim of the article is to bridge the gap in the study of Nicolaus de Radom’s output by presenting a comparative analysis of his works as juxtaposed with other European artists. The prevailing opinion of musicologists, such as Maria Szczepańska and Mirosław Perz, is that Nicolaus de Radom’s music is closely related to the works of northern Italian composers. However, such a claim has not yet been supported with the detailed comparative analysis. The article presents the analy¬sis of the manuscripts Kras 52 and Wn 378, signed by Nicolaus de Radom, confronted with selected masses by Johannes Ciconia and Antonio Zacara da Teramo. A detailed analysis of a two-sectioned cyclic mass helps to distinguish certain similarities and differences in the unification of the Mass pairs, as they are exemplified in the music of the composers. The works of all of the three artists manifest secular songs’ influence on the shaping of the Mass as a genre, although each composer adapts it in a slightly different way. Moreover, it is stated that a thorough analysis of the 15th-century Masses is necessary to determine whether there are any links between Nicolaus de Radom’s, Antonio Zacara da Teramo’s and Johannes Ciconia’s works, and whether there are any similarities in their compositional technique. Presented analysis of de Radom’s, Zacara da Teramo’s and Ciconia’s Masses refutes the claim that Nicolaus de Radom’s output bears closest relation to those of Zacara da Teramo’s. The results of the study reveal that there are no straightforward examples which would support such a theory.
EN
Shape is one of the key discriminating factors in seeds. It plays a major role in seed cleaning and sorting, and it influences the bulk behavior of seeds. The shape of seeds can be described with the use of sphericity factors. In this study, the thickness, width, length and mass of principal cereal seeds (wheat, rye, barley, oats and triticale) were determined. The geometric parameters of seeds were used to calculate five sphericity factors for each seed type. The results of measurements and calculations were processed statistically by analysis of variance, correlation analysis and linear regression analysis. In the group of the analyzed cereal seeds, the lowest values were noted for sphericity factor K5 in the range of 0.046 to 0.275, and the highest values - for sphericity factor K3 in the range of 0.359 to 0.650. The shape of cereal seeds was mostly highly correlated with: thickness in barley seeds, width in wheat seeds, width and thickness in rye and triticale seeds, and length in oat seeds. All of the analyzed sphericity factors can be used interchangeably to describe the shape of cereal seeds, and the relationships between those factors can be described with linear equations.
EN
In the article "'Investing in poetry isn't worth it'? The poetical criticism of popculture in Lipska's chosen poems from the years 2007-2015", Joanna Sapa proposes an analysis of the way in which the lyrical subject estimates and comments on the present cultural transformations that result from mass culture drawing in almost all elements of reality. The author's considerations begin with a reminder of Eagleton’s observations on the contemporary diminished importance of the real content of culture (understood as the material, ethical, and moral goods of a society) as compared to the meanings it is attributed by the society. The development of mass culture – including the reproduction of works, consumerism, globalization, and Theodor Adorno's „cultural industry” – caused a transformation of cultural goods into commodities. Zygmunt Bauman also writes about the special "consumer syndrome” being the effect of an ubiquitous and importunate marketization of human workings. The aim of the presented analysis is to highlight the poems from Lipska's newest poetical volumes: Newton's orange (2007), Aftersound (2010), Reader of papillary lines (2015) in which the lyrical I subject narrates the consequences of the chaotic, mass circulation of culture and of the mixing that occurs between the sphere of elitist culture and mass culture. In these poems, the lyrical I additionally talks about aging and death in the context of popular culture, and exposes various ways of valuing reality in media records. The Key according to which the author arranged Lipska’s poems into different sections is based on the metaphors they use (from diverse thematic circles). These are: the combination of high art and colloquial language ("MacHamlet’s on stage”); the consumers' uncritical acceptance of media's idealized world ("in apartments of television the pleb with the stars”); aging and dying as described by metaphors related to fashion and clothes ("in wide woollen shoulders of death”).
PL
W naszych rozważaniach zatrzymamy się nad miarami masy używanymi w Biblii. Pierwszym punktem opracowania będzie historycznie usytuowane "wzmiankowanie" o wspomnianych miarach, zakończone tabelką jednostek miary masy używanych w Syrii, Palestynie, Grecji i Rzymie. W części drugiej zaprezentujemy wersety zawierające poszczególne miary.
EN
In our considerations, we will focus on units of measures as used in the Bible. The first point of the study will be a historically located "mentioning" of the aforesaid measures, ended with a table with units of measures used in Syria, Palestine, Greece and Rome. In the second part, we will present verses containing particular measures.
EN
Transport is a major source of the particle pollution (PM). Combustion engine particulate emissions have the potential cause adverse health effects. These effects include cancer and other pulmonary and cardiovascular diseases. A substantial proportion of the number of particles, but not the mass, is ultrafine. For example – one million particles of 100 nanometers size with a unit density of 1 g/cm3 have a mass of approximately 0.0005 g. The paper includes research results of mass and number concentration of nanoPM for 1.9 TDI VW exhaust gases fuelled by standard diesel. The measurements were performed for ambient air and 3 different point of engine work (idle speed, low and high load at 2000 rpm). For nanoPM measurements was used Electrical Low Pressure Impactor ELPI from DECATI, was found, among other things, that the biggest mass concentration was at 0.1-10 μm of PM diameter but the biggest number concentration was at 0,01 – 0,1 μm and thus for the size of solid particles of at least an order of magnitude smaller than the mass concentration. The biggest the negative differences in the mass concentration occur in the exhaust gases of the RME fuelled engine (in comparison with diesel fuel) at engine idling when the smallest injection pressure and temperature inside the engine cylinder exist and the oxygen availability is also the lowest (because of the small charging pressure and high EGR rate). Such measurements are important not only in terms of utilitarian but also in cognitive sense – for determining the effect of the engine construction parameters and/or regulating the engine (or the fuel composition) on the mass and the number of nanoparticles emitted in the exhaust gases.
PL
Poprawka wynikająca z występowania siły wyporu może być dość znaczna. To, czy tę poprawkę należy stosować, zależy od wymagań co do dokładności, jakie powinna spełniać analiza wagowa. Konieczna jest zatem indywidualna ocena błędów związanych z procesem wagowym.
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