Zobrazeno 1 - 10
of 623
pro vyhledávání: '"R.J. Collier"'
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 10, Pp 7295-7309 (2023)
ABSTRACT: The dairy industry depends upon the cow's successful lactation for economic profitability. Heat stress compromises the economic sustainability of the dairy industry by reducing milk production and increasing the risk of metabolic and pathog
Externí odkaz:
https://doaj.org/article/4ac45ae3e7c04848970f2d0b9acd29bb
Publikováno v:
Animal, Vol 6, Iss 5, Pp 707-728 (2012)
Despite many challenges faced by animal producers, including environmental problems, diseases, economic pressure, and feed availability, it is still predicted that animal production in developing countries will continue to sustain the future growth o
Externí odkaz:
https://doaj.org/article/762bc1452b8a46c6b89e8fb790ecf57f
Publikováno v:
Animal, Vol 6, Iss 3, Pp 403-414 (2012)
The dry period is required to facilitate cell turnover in the bovine mammary gland in order to optimize milk yield in the next lactation. Traditionally, an 8-week dry period has been a standard management practice for dairy cows based on retrospectiv
Externí odkaz:
https://doaj.org/article/5b9f8f4f55ec41a29d4fa1138d1e2cda
Publikováno v:
Journal of Dairy Science. 103:6751-6770
Animal welfare can be negatively affected when dairy cattle experience heat stress. Managing heat stress has become more of a challenge than ever before, due to the increasing number of production animals with increased milk yield, and therefore grea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11d9505040e7bbc372fa454d30f1fad7
https://doi.org/10.3168/jds.2019-17929
https://doi.org/10.3168/jds.2019-17929
Publikováno v:
Electronics Letters, Vol 57, Iss 9, Pp 366-368 (2021)
When standing waves are present in a rectangular waveguide, the resistive losses in the walls are not uniformly distributed. This affects the measurement of the attenuation constant. Here the phenomenon for the TE10 mode in air‐filled waveguide, wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6169d1e1e0d162654f1964e6e689df0
https://doi.org/10.1049/ell2.12017
https://doi.org/10.1049/ell2.12017
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 68:294-296
This paper investigates the possibility of using layers of graphene to form primary impedance standards for millimeter-wave rectangular metallic waveguide. It is shown that standards with values of $Y_{0}$ , $2Y_{0,}$ and $3Y_{0}$ can be produced by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9004a123db4d03b8430611e6c1303b7
https://doi.org/10.1109/tim.2018.2872499
https://doi.org/10.1109/tim.2018.2872499
Publikováno v:
IEEE Microwave and Wireless Components Letters. 28:639-641
A mathematical description of the variation of the attenuation constant in the presence of standing waves is presented. This letter proposes equations describing such phenomena, formulated from basic transmission line analysis. The results could be u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4888dbb439bd777c330e0c22303d3ea1
https://doi.org/10.1109/lmwc.2018.2848479
https://doi.org/10.1109/lmwc.2018.2848479
Autor:
R.J. Collier
Publikováno v:
2016 46th European Microwave Conference (EuMC).
This paper sets out the case for an increase in the teaching of pulses on transmission lines, since this is now their major usage. Following this, the paper contains some examples of the typical problems that could be used in teaching and the basic p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5261c824f14a4b2b63253a3f1026f146
https://doi.org/10.1109/eumc.2016.7824600
https://doi.org/10.1109/eumc.2016.7824600
Autor:
M.-H.J. Lee, R.J. Collier
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 54:2412-2415
This paper describes a technique for measuring the sheet resistance of thin metallic films at both 130 GHz and dc (0 Hz). The high-frequency measurements were made using dielectric waveguides, and the conventional four-point probe was used for the lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa05e889eee3eb08364755b3501e975c
https://doi.org/10.1109/tim.2005.858536
https://doi.org/10.1109/tim.2005.858536
