Effects of embryo temperature estimation methodology on the determination of eggshell conductance values in Ross 708 broiler hatching eggs with consideration given to eggshell pigmentation variation 
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We consider a problem arising in designing Compact Thermal Models (CTMs) for the purpose of simulating the thermal response of a package. CTMs are often preferred over more detailed models due to their minimal representation and the reduced computations required to obtain accurate nodal temperature predictions under hypothetical scenarios. The quality of CTM performance depends on the determination of an appropriate set of parameters that drive the model. The subject of this paper is a heuristic nonlinear optimization approach to computing the set of CTM parameters that best predicts the thermal response of a package. Our algorithm solves a series of one-dimensional nonconvex optimization problems to obtain these parameters, exploiting the special structure of the CTM in order to improve both the execution time of the algorithm and the quality of the CTM performance. We conclude the paper by providing a brief array of computational results as a proof of concept, along with several possible future research extensions.

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An investigation on the determination of factors influencing chick sex prediction in hatching eggs

African Journal of Agricultural Research ◽

10.5897/ajar2013.8230 ◽

2014 ◽

Vol 9 (6) ◽

pp. 603-606 ◽

Cited By ~ 1

Author(s):

Alaşahan Sema ◽

opur Akpinar Glşen

Keyword(s):

Factors Influencing ◽

Hatching Eggs

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Occurrence of Enterococcus spp. in poultry in Poland based on 2014–2015 data

Medycyna Weterynaryjna ◽

10.21521/mw.5680 ◽

2017 ◽

Vol 73 (4) ◽

pp. 220-224 ◽

Cited By ~ 2

Author(s):

Beata Dolka ◽

Mariola Gołębiewska–Kosakowska ◽

Krzysztof Krajewski ◽

Piotr Kwieciński ◽

Tomasz Nowak ◽

...

Keyword(s):

Broiler Chickens ◽

Enterococcus Species ◽

Broiler Breeder ◽

High Prevalence ◽

Enterococcus Spp ◽

Natural Microflora ◽

Enterococcal Species ◽

The Mean ◽

Hatching Eggs

Bacteria of the genus Enterococcus are mainly commensals building natural microflora in the digestive tract of birds and mammals. They belong to the potentially pathogenic microorganisms. Among poultry, infections caused by enterococci were reported in chickens, turkeys, ducks and ostriches. The aim of this study was to evaluate the occurrence of enterococci in poultry in Poland, including identification of enterococcus species composition and determination of the age of birds. The analysis was based on data obtained from 2014 – 2015 from Division of Avian Diseases at Warsaw University of Life Sciences-SGGW and four veterinary laboratories in Poland: Lab – Vet, Tarnowo Podgórne; SLW Biolab, Ostróda; Vetdiagnostica, Solec Kujawski; Vet – Lab Brudzew. Seven enterococcal species were isolated from broiler chickens (CB), commercial layers (CL), and broiler breeder flocks (BB), nine from all poultry types (chickens, turkey, ducks and geese). The most often isolated enterococci from CB were E. faecalis (57%) > E. cecorum (7%) > E. faecium (5.2%) > E. hirae (3.6%) > E. gallinarum (2.5%) > E. casseliflavus (0.7%) > E. durans (0.2%). Seven Enterococcus species were isolated from sources associated with poultry, most often E. faecalis > E. faecium > E. cecorum > E. hirae. The differences in the occurrence of particular enterococcal species were observed between CB, BB and CL. The mean age at the time of isolation of E. cecorum was approx.: 3.6 weeks in CB, 27.5 weeks in BB, 33.3 weeks in CL, 12.9 weeks in turkeys, 3.6 weeks in ducks, 39.5 weeks in geese. E. faecalis and E. faecium dominated in samples obtained from hatching eggs, dead-in-shell embryos and from samples related to poultry environment. In conclusion, this study indicates the high prevalence of bacteria of the Enterococcus genus in poultry. The present findings demonstrate the differences in Enterococcus species between poultry groups, including with regard to age. In total 10 enterococcal species (E. faecalis, E. cecorum, E. hirae, E. faecium, E. gallinarum, E. casseliflavus, E. durans, E. avium E. thailandicus, E. aquimarinus) were detected in poultry, poultry environmental samples, hatching eggs and dead-in-shell embryos. Enterococcus faecalis and E. cecorum were found in all above-mentioned sources.

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Galactic orbits of stars

Symposium - International Astronomical Union ◽

10.1017/s0074180900105340 ◽

1966 ◽

Vol 25 ◽

pp. 93-97

Author(s):

Richard Woolley

Keyword(s):

Globular Cluster ◽

Potential Field ◽

High Velocity ◽

Velocity Vector ◽

Variable Stars ◽

The Sun ◽

Proper Motions ◽

Rr Lyrae ◽

The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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Distance to SN 1987A and the LMC

Symposium - International Astronomical Union ◽

10.1017/s0074180900118959 ◽

1999 ◽

Vol 190 ◽

pp. 549-554

Author(s):

Nino Panagia

Keyword(s):

Angular Size ◽

Large Magellanic Cloud ◽

Magellanic Cloud ◽

Light Curves ◽

Distance Modulus ◽

Absolute Size ◽

Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

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International determination of the total motion of the pole

Symposium - International Astronomical Union ◽

10.1017/s0074180900177824 ◽

1961 ◽

Vol 13 ◽

pp. 29-41

Author(s):

Wm. Markowitz

Keyword(s):

Secular Motion ◽

The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

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