1,720,988 research outputs found
CRITICAL EXPONENTS OF Z-2 GAUGE-THEORY IN (3 + 1) DIMENSIONS
No full textKEHL E, Satz H, WALTL B. CRITICAL EXPONENTS OF Z-2 GAUGE-THEORY IN (3 + 1) DIMENSIONS. NUCLEAR PHYSICS B. 1988;305(2):324-337
CRITICAL-BEHAVIOR IN RANDOM FIELD GAUGE-THEORY
No full textGUIOT C, KEHL E, Satz H, WALTL B. CRITICAL-BEHAVIOR IN RANDOM FIELD GAUGE-THEORY. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. 1988;38(3):495-499
Critical behaviour in baryonic matter
Full text linkBerg B, Engels J, Kehl E, Waltl B, Satz H. Critical behaviour in baryonic matter. Zeitschrift für Physik, C: Particles and Fields. 1986;31(1):167-174
CRITICAL EXPONENTS OF SU(2) GAUGE-THEORY IN 2+1 DIMENSIONS
No full textKEHL E, Miller D, Satz H, WALTL B. CRITICAL EXPONENTS OF SU(2) GAUGE-THEORY IN 2+1 DIMENSIONS. PHYSICAL REVIEW D. 1988;38(6):1950-1953
Deconfinement for SU(2) gauge theory in 2+1 dimensions
Full text linkEngels J, Kehl E, Satz H, Waltl B. Deconfinement for SU(2) gauge theory in 2+1 dimensions. Physical review letters. 1985;55(26):2839-2841.By calculating Polyakov-loop averages on a 60 2×2 lattice, we determine the critical exponent of deconfinement for SU(2) gauge theory in 2+1 dimensions. Universality arguments predict it to be the same as the critical exponent [beta]=(1/8) for the spontaneous magnetization in the two-dimensional Ising model. Our results are in good accord with this prediction
Genetic and nongenetic variation of multiple births in Austrian dual-purpose cows
Full text linkIn recent decades, a general increase in multiple birth (MB) rate has been reported in both dairy and dual-purpose cattle breeds. As there is evidence that MB has negative effects on economically important traits in dairy cows, the aims of this study were to (i) investigate environmental and genetic factors affecting MB rate and (ii) assess the impact of MB on productive and nonproductive traits of the Austrian dual-purpose breeds Pinzgauer and Tyrol Grey. The dataset included 99,141 calvings of 33,791 Pinzgauer and 68,454 calvings of 19,244 Tyrol Grey cows recorded from 2000 to 2022. Environmental factors affecting MB were investigated using logistic regression, and genetic parameters of MB were estimated using linear and threshold animal models. In addition, the effects of MB on milk, fat, and protein yields and calving ease were analyzed using a linear mixed model, whereas stillbirth and cow survival (binary traits) were analyzed by logistic regression. The average MB rate from 2000 to 2022 was 5.80% for Pinzgauer and 3.89% for Tyrol Grey. The lowest MB rate was observed in primiparous cows in both breeds, and the highest in fourth-parity Pinzgauer and seventh-parity Tyrol Grey cows. The highest MB rate was in summer regardless of the breed. In Pinzgauer, the MB negatively affected dairy traits and survival, and in Tyrol Grey, it affected fat yield and calving ease. Stillbirth was notably higher when MB occurred than in single births in both breeds. In Pinzgauer, the estimated heritability was 0.029 (linear) and 0.138 (threshold), whereas in Tyrol Grey, it was 0.040 (linear) and 0.200 (threshold). Low additive genetic variation exists for this trait, but it is still exploitable in genetic programs aimed at curbing the MB rate
Genetic and nongenetic variation of multiple births in Austrian dual-purpose cows
No full textIn recent decades, a general increase in multiple birth (MB) rate has been reported in both dairy and dual-purpose cattle breeds. As there is evidence that MB has negative effects on economically important traits in dairy cows, the aims of this study were to (i) investigate environmental and genetic factors affecting MB rate and (ii) assess the impact of MB on productive and nonproductive traits of the Austrian dual-purpose breeds Pinzgauer and Tyrol Grey. The dataset included 99,141 calvings of 33,791 Pinzgauer and 68,454 calvings of 19,244 Tyrol Grey cows recorded from 2000 to 2022. Environmental factors affecting MB were investigated using logistic regression, and genetic parameters of MB were estimated using linear and threshold animal models. In addition, the effects of MB on milk, fat, and protein yields and calving ease were analyzed using a linear mixed model, whereas stillbirth and cow survival (binary traits) were analyzed by logistic regression. The average MB rate from 2000 to 2022 was 5.80% for Pinzgauer and 3.89% for Tyrol Grey. The lowest MB rate was observed in primiparous cows in both breeds, and the highest in fourth-parity Pinzgauer and seventh-parity Tyrol Grey cows. The highest MB rate was in summer regardless of the breed. In Pinzgauer, the MB negatively affected dairy traits and survival, and in Tyrol Grey, it affected fat yield and calving ease. Stillbirth was notably higher when MB occurred than in single births in both breeds. In Pinzgauer, the estimated heritability was 0.029 (linear) and 0.138 (threshold), whereas in Tyrol Grey, it was 0.040 (linear) and 0.200 (threshold). Low additive genetic variation exists for this trait, but it is still exploitable in genetic programs aimed at curbing the MB rate
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Genetic associations of lactose and its ratios to other milk solids with health traits in Austrian Fleckvieh cows
No full textThe genetic correlations (ra) of milk lactose percentage (LP), lactose yield (LY), and ratios of LP to other milk solids with udder, metabolic, and fertility disorders have not been assessed in dairy cattle so far. To evaluate the potential role of milk lactose as indicator of cow health, 142,285 lactation records of 84,289 Austrian Fleckvieh cows were analyzed with univariate and bivariate animal models. Milk traits were on a 150-d basis and health traits were coded as binary (0/1). Other than LP and LY, 3 new phenotypes were defined and included in the present study, namely the lactose-to-fat, lactose-to-protein, and lactose-to-solids ratios. The most heritable trait was LP (0.566 ± 0.008) and heritability of LY was much lower (0.145 ± 0.005). Heritability estimates close to 0.50 were assessed for the ratios. The frequency of health disorders was higher in multiparous cows yielding milk with low LP (≤4.553%) compared with cows yielding milk with high LP (≥5.045%). Heritabilities of health traits were in the expected ranges, with the highest estimate for ovarian cysts (CYS; 0.037 ± 0.004) and the lowest for retained placenta (0.005 ± 0.001). Mastitis (MAS) genetically correlated with LY (0.518 ± 0.057); considering that the amount of synthesized lactose is the key regulator of milk volume, this result confirmed that high-producing cows are more genetically susceptible to MAS than low-producing animals. Similar to MAS, ketosis (KET) was also positively genetically associated with LY (0.420 ± 0.077) and a weak and unfavorable ra between KET and lactose-to-protein ratio was estimated (0.159 ± 0.077). The ra of LY with milk fever (MFV) and CYS were approximately 0.20. The ra of LP with MAS, KET, and MFV were negative (−0.142 on average), supporting the idea that LP is a potential health indicator. Genetic correlations between health traits ranged from zero (retained placenta with MAS and CYS) to 0.463 ± 0.090 (MAS and MFV). Results of the present study suggest that LP has potentiality to be used as indicator trait to improve udder health in Austrian Fleckvieh population
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