GAUSSIAN ANALYSIS OF SYMMETRY BEHAVIOR

1992 ◽  
Vol 07 (04) ◽  
pp. 755-764 ◽  
Author(s):  
S. K. KIM ◽  
J. YANG ◽  
W. NAMGUNG ◽  
K. S. SOH ◽  
J. H. YEE
Keyword(s):  
Symmetry Breaking ◽  
Einstein Space ◽  
The Other ◽  
Infrared Singularity ◽  
Gaussian Analysis ◽  
Einstein Spaces ◽  
Spatial Volume ◽  
Two Phases ◽  
Phase Symmetry ◽  
Schrödinger Picture

We use the functional variational method in the Schrödinger picture to examine the existence of two phases of the scalar ϕ4 theory in Minkowski and Einstein spaces. In the static Einstein space one of the phases shows the possibility of spontaneous symmetry breaking even when the renormalized mass is positive, while in the other phase symmetry breaking is prohibited owing to the infrared singularity caused by the finiteness of the spatial volume.

CHANGES IN THE COMPOSITION AND YIELD OF THE MAMMARY SECRETION OF COWS DURING THE INITIATION OF LACTATION

1973 ◽  
Vol 59 (2) ◽  
pp. 231-247 ◽  
Author(s):  
P. E. HARTMANN
Keyword(s):  
Mammary Gland ◽  
Late Pregnancy ◽  
The Other ◽  
Small Samples ◽  
Dry Period ◽  
Abrupt Increase ◽  
Milk Samples ◽  
Casein Protein ◽  
Two Phases

SUMMARY Mammary secretion (1·2–2·0 ml) was collected from the milk sinus of each mammary gland (quarter) of two pregnant heifers and eight pregnant cows (dry period 49–229 days), first at weekly intervals from 40 days before parturition, then with increasing frequency as parturition approached. The progressive changes in the concentration of lactose, glucose, casein, non-casein protein and fat in the mammary secretion were determined. Calves were separated from the cows immediately after birth and the yield and composition of milk from individual quarters were determined for 5 days after parturition. Two quarters (milked quarters) of each of a further five cows were milked throughout pregnancy, while the other two quarters (unmilked quarters) of each cow were allowed to involute (dry off) 63– 104 days before parturition. Small samples (5–10 ml) of secretion were collected from the unmilked quarters, first at weekly intervals after drying off and then every second day from 10 to 15 days before parturition. On the days that the unmilked quarters were sampled, corresponding composite milk samples were collected from the milked quarters and the progressive changes in the yield of milk, lactose and fat were determined. The changes in the concentration of lactose and glucose in the mammary secretion, during drying off in late lactation, were determined in an additional five cows. In most cows allowed a usual dry period, and in the unmilked quarters of cows in which two quarters were milked throughout pregnancy, the concentration of lactose gradually increased from about 8 to 12 days before parturition to reach levels of about half those found in normal milk just before parturition. However, in some cows the concentration of lactose was low until 1–2 days before parturition and then increased abruptly, whereas in others the concentration of lactose increased slowly from as early as 32 days before parturition. A further rapid increase in the concentration of lactose in the mammary secretion occurred between 0 and 4 days before parturition in all cows. This latter increase was accompanied by an abrupt increase in the yield of milk, lactose and fat in the milked quarters of the cows in which two quarters were milked throughout pregnancy. These observations suggest that the initiation of lactation in the cow develops in two phases, a limited secretion of milk constituents occurs in late pregnancy and then 0–4 days before parturition copious secretion (lactogenesis) occurs.

scholarly journals Volume-preserving geodesic symmetries on four-dimensional Hermitian Einstein spaces

1997 ◽  
Vol 146 ◽  
pp. 13-29 ◽  
Author(s):  
J. T. Cho ◽  
K. Sekigawa ◽  
L. Vanhecke
Keyword(s):  
Einstein Space ◽  
Einstein Spaces ◽  
Volume Preserving

Abstract.We prove that a four-dimensional Hermitian Einstein space is weakly *-Einsteinian and use this result to show that all geodesic symmetries are volume-preserving (up to sign) if and only if it is local symmetric.

Resistive transition broadening in two-phase polycrystalline YBaCuO

1993 ◽  
Vol 8 (5) ◽  
pp. 957-961 ◽  
Author(s):  
J.C. Abele ◽  
R.L. Bristol ◽  
T.C. Nguyen ◽  
M.W. Ohmer ◽  
L.S. Wood
Keyword(s):  
Magnetic Fields ◽  
Computer Models ◽  
Structured Data ◽  
The Other ◽  
Critical Ratio ◽  
Resistive Transition ◽  
Two Phase ◽  
Two Phases

A model proposed by Tinkham1to explain the resistance versus temperature broadening found in highTcsuperconductors in applied magnetic fields is extended to “foot and knee”-structured data taken on polycrystalline YBa2Cu3O6+δ. The proposed extension involves a series combination of two types of superconductors. For this series combination to result, a critical ratio of the two types of superconductors must be met—a result common to both percolation and randomized cellular autonoma theory. This critical ratio is investigated via statistical computer models of a polycrystalline superconductor having two phases of crystallites—one with substantially lowerJcthan the other.

scholarly journals Logros de niños y niñas de educación inicial mediante el juego con bloques de Lego (Achievements of Early Childhood Education children through play with Lego blocks)

Retos ◽  
2020 ◽  
pp. 241-249
Author(s):  
Alix María Casadiego ◽  
Karina Avendaño Casadiego ◽  
Leidy Carolina Cuervo ◽  
Gabriel Avendaño Casadiego ◽  
Alvaro Avendaño Rodríguez
Keyword(s):  
Early Childhood ◽  
Early Childhood Education ◽  
Temporal Relationship ◽  
Free Play ◽  
The Other ◽  
Pedagogical Practices ◽  
Childhood Education ◽  
Didactic Engineering ◽  
Two Phases ◽  
Observation Code

 El juego, además de ser una de las experiencias que más disfrutan niños y niñas durante su etapa en educación inicial, les permite aprender y desarrollarse en forma integral. De acuerdo con ello, el presente estudio tiene como objetivo indagar en cuáles logros en relaciones espaciales, temporales y socioafectivas son más exitosos los niños y las niñas de educación inicial e identificar su evolución durante 10 semanas de observación. La metodología tuvo dos fases: inicialmente, mediante la ingeniería didáctica, se construyó un código de observación y una vez construido se realizaron las observaciones durante 10 semanas de trabajo. Las actividades fueron realizadas, durante las horas de juego libre, en las escuelas donde la Facultad de Educación de la Universidad Surcolombiana realiza sus prácticas pedagógicas. Los resultados mostraron que es en la actividad socio afectiva donde se obtienen mayores logros desde el comienzo de la experiencia; por otro lado, el principal logro se obtiene en la característica relación temporal, relacionada con la capacidad para anticiparse a los acontecimientos o predecir resultados, específicamente en la capacidad de organizar un plan para llevar a cabo una idea, que se logra en un 87%. Abstract. Playing, in addition to being one of the experiences that children enjoy the most during their stage of early childhood education, allows them to learn and develop in an integral way. In accordance with this, the present study aims to investigate which achievements in spatial, temporal and socio-affective relationships are more successful in early childhood education children and to identify their evolution during 10 weeks of observation. The methodology had two phases: initially, through didactic engineering, an observation code was constructed and once it was ready, observations were made during 10 weeks of work. The activities were carried out, during free play hours, in the schools where the Education Faculty of the Surcolombiana University carries out its pedagogical practices. The results showed that it is in the socio-affective activity where the greatest achievements are obtained from the beginning of the experience; on the other hand, the main achievement is obtained in the characteristic temporal relationship, related to the ability to anticipate events or predict results, specifically in the ability to organize a plan to carry out an idea, is achieved 87%.

A superamphiphobic surface with a hydrogen peroxide-triggered switch to antithetic fluid repellence in a liquid–liquid–air three-phase fluid system

2020 ◽  
Vol 56 (31) ◽  
pp. 4312-4315
Author(s):  
Yihan Sun ◽  
Jinxia Huang ◽  
Zhiguang Guo
Keyword(s):  
Hydrogen Peroxide ◽  
The Other ◽  
Fluid System ◽  
System P ◽  
Arbitrary Phase ◽  
Three Phase ◽  
Air System ◽  
Two Phases ◽  
Phase Fluid

Fluid repellence in one arbitrary phase for repelling the other two phases in a generalized liquid–liquid–air system was achieved on a hydrogen peroxide-treated surface.

Curvature Bounds for the Spectrum of Closed Einstein Spaces

1978 ◽  
Vol 30 (5) ◽  
pp. 1087-1091 ◽  
Author(s):  
Udo Simon
Keyword(s):  
Lower Bound ◽  
Scalar Curvature ◽  
Sectional Curvature ◽  
Constant Scalar Curvature ◽  
Einstein Space ◽  
Curvature Bounds ◽  
Nonzero Eigenvalue ◽  
Einstein Spaces ◽  
Image Position

The following is our main result.(A) THEOREM. Let (M, g) be a closed connected Einstein space, n = dim M ≧ 2 (with constant scalar curvature R). Let K0 be the lower bound of the sectional curvature. Then either (M, g) is isometrically diffeomorphic to a sphere and the first nonzero eigenvalue ƛ1of the Laplacian fulfils

Internal Einstein spaces and symmetry breaking

1984 ◽  
Vol 143 (4-6) ◽  
pp. 403-406 ◽  
Author(s):  
R. Coquereaux
Keyword(s):  
Symmetry Breaking ◽  
Einstein Spaces

scholarly journals Four-Quark States from Functional Methods

2020 ◽  
Vol 61 (4) ◽  
Author(s):  
Gernot Eichmann ◽  
Christian S. Fischer ◽  
Walter Heupel ◽  
Nico Santowsky ◽  
Paul C. Wallbott
Keyword(s):  
Symmetry Breaking ◽  
Scalar Meson ◽  
Chiral Symmetry Breaking ◽  
The Other ◽  
Feature Article ◽  
Exotic Mesons ◽  
Scalar Mesons ◽  
Functional Methods ◽  
Internal Structures ◽  
Light Scalar

AbstractIn this feature article we summarise and highlight aspects of the treatment of four-quark states with functional methods. Model approaches to those exotic mesons almost inevitably have to assume certain internal structures, e.g. by grouping quarks and antiquarks into (anti-)diquark clusters or heavy-light $$q{\bar{q}}$$ q q ¯ pairs. Functional methods using Dyson–Schwinger and Bethe–Salpeter equations can be formulated without such prejudice and therefore have the potential to put these assumptions to test and discriminate between such models. So far, functional methods have been used to study the light scalar-meson sector and the heavy-light sector with a pair of charmed and a pair of light quarks in different quantum number channels. For all these states, the dominant components in terms of internal two-body clustering have been identified. It turns out that chiral symmetry breaking plays an important role for the dominant clusters in the light meson sector (in particular for the scalar mesons) and that this property is carried over to the heavy-light sector. Diquark-antidiquark components, on the other hand, turn out to be almost negligible for most states with the exception of open-charm heavy-light exotics.

Modifying infants’ sensitivity to audiovisual temporal mismatch

2012 ◽  
Vol 25 (0) ◽  
pp. 84-85
Author(s):  
Ferran Pons ◽  
Maria Teixidó ◽  
Joel García-Morera ◽  
Jordi Navarra
Keyword(s):  
The Other ◽  
Short Term ◽  
Bouncing Ball ◽  
Speech Stimuli ◽  
Short Term Exposure ◽  
Ball Bouncing ◽  
The Difference ◽  
Two Phases ◽  
Av Synchrony ◽  
Paired Preference

Studies in adults reveal that a short-term exposure to asynchronous audiovisual signals induces temporal realignment between these signals (Di Luca et al., 2009; Fujisaki et al., 2004; Navarra et al., 2009; Vroomen et al., 2004). In contrast with this evidence in adults, Lewkowicz (2010) observed that infants increased their sensitivity to AV asynchrony after exposure to asynchronous AV speech. We investigated whether brief experience with an asynchronous AV event would increase infants’ ability to discriminate AV synchrony from asynchrony in non-speech stimuli or else induce temporal realignment as observed in adults. Twenty-four 6-month-old infants were tested in two phases (Test 1 and 2) using an intersensory paired-preference procedure, with simple stimuli (two balls bouncing against the floor — one ball bouncing in synchrony while the other one in asynchrony with respect to the bouncing sound). Between Test 1 and 2, infants were exposed to AV asynchrony (a presentation of an audiovisually asynchronous bouncing ball). The results revealed that infants detected the difference between AV synchrony and asynchrony only after being exposed to an asynchronous AV event. Our findings support the idea that experience with AV asynchrony has different consequences for adults and infants: while temporal AV recalibration is observed in adults, an increase of the sensitivity to AV asynchrony is observed in infants.

Paleomagnetism of the Great Slave Supergroup, Northwest Territories, Canada: the Tochatwi Formation

1976 ◽  
Vol 13 (4) ◽  
pp. 555-562 ◽  
Author(s):  
M. E. Evans ◽  
D. K. Bingham
Keyword(s):  
Northwest Territories ◽  
North American ◽  
Pole Position ◽  
The Other ◽  
Thermal Demagnetization ◽  
Fine Grained ◽  
I 11 ◽  
Two Phases ◽  
Geological Work ◽  
Magnetic Vectors

The Tochatwi Formation comprises some 800 m of fine-grained red to buff sandstone in the upper part of the Great Slave Supergroup. Recent geological work indicates an age of 1700 m.y., but this is not yet known with certainty. Results from 29 sampling sites stratigraphically covering the Tochatwi Formation are presented. Standard paleomagnetic techniques indicate that post-folding remagnetization is common, and this is confirmed by analysis of the magnetic vectors removed as partial thermal demagnetization proceeds. Two phases of remagnetization are recognized, one of which can be attributed to nearby Mackenzie-age intrusions. The other phase is equivalent to a remagnetization observed by other workers in Kahochella Group strata at localities 70 km away. As yet, the source of this remagnetization event cannot be identified. Eight sampling sites have escaped total remagnetization and an earlier, pre-folding remanence has been isolated from these (D = 030, I = −11, k = 14, α95 = 15°). The corresponding pole position (144W, 18S) is remote from those deduced from North American rocks of similar age, and possible explanations of this problem are discussed.

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