scholarly journals Use of a sperm analyzer for evaluating broiler breeder males. 2. Selection of young broiler breeder roosters for the sperm quality index increases fertile egg production

2000 ◽  
Vol 79 (5) ◽  
pp. 771-777 ◽  
Author(s):  
H.M. Parker ◽  
J.B. Yeatman ◽  
C.D. Schultz ◽  
C.D. Zumwalt ◽  
C.D. McDaniel
Keyword(s):  
Quality Index ◽  
Egg Production ◽  
Sperm Quality ◽  
Broiler Breeder ◽  
Broiler Breeder Males ◽  
Selection Of

scholarly journals Use of a sperm analyzer for evaluating broiler breeder males. 1. Effects of altering sperm quality and quantity on the sperm motility index

1998 ◽  
Vol 77 (6) ◽  
pp. 888-893 ◽  
Author(s):  
CD McDaniel ◽  
JL Hannah ◽  
HM Parker ◽  
TW Smith ◽  
CD Schultz ◽  
...  
Keyword(s):  
Sperm Motility ◽  
Sperm Quality ◽  
Motility Index ◽  
Broiler Breeder ◽  
Broiler Breeder Males

Fertility and Sperm Quality of Broiler Breeder Males Infected with Subgroup J Avian Leukosis Virus

2002 ◽  
Vol 46 (4) ◽  
pp. 1033-1037
Author(s):  
Benton P. Hudson ◽  
Jeanna L. Wilson ◽  
Guillermo Zavala ◽  
Jean E. Sander
Keyword(s):  
Sperm Quality ◽  
Avian Leukosis Virus ◽  
Broiler Breeder ◽  
Broiler Breeder Males ◽  
Subgroup J

scholarly journals Weightage Effect during Back-Calculation of Rock-Mass Quality from the Installed Tunnel Support in Rock-Mass Rating and Tunneling Quality Index System

2019 ◽  
Vol 9 (10) ◽  
pp. 2065 ◽  
Author(s):  
Jonguk Kim ◽  
Hafeezur Rehman ◽  
Wahid Ali ◽  
Abdul Muntaqim Naji ◽  
Hankyu Yoo
Keyword(s):  
Rock Mass ◽  
Quality Index ◽  
Rock Bolt ◽  
Rock Mass Rating ◽  
Rock Mass Quality ◽  
Back Calculation ◽  
The Difference ◽  
Bolt Spacing ◽  
Q System ◽  
Selection Of

In extensively used empirical rock-mass classification systems, the rock-mass rating (RMR) and tunneling quality index (Q) system, rock-mass quality, and tunnel span are used for the selection of rock bolt length and spacing and shotcrete thickness. In both systems, the rock bolt spacing and shotcrete thickness selection are based on the same principle, which is used for the back-calculation of the rock-mass quality. For back-calculation, there is no criterion for the selection of rock-bolt-spacing-based rock-mass quality weightage and shotcrete thickness along with tunnel-span-based rock-mass quality weightage. To determine this weightage effect during the back-calculation, five weightage cases are selected, explained through example, and applied using published data. In the RMR system, the weightage effect is expressed in terms of the difference between the calculated and back-calculated rock-mass quality in the two versions of RMR. In the Q system, the weightage effect is presented in plots of stress reduction factor versus relative block size. The results show that the weightage effect during back-calculation not only depends on the difference in rock-bolt-spacing-based rock-mass quality and shotcrete along with tunnel-span-based rock-mass quality, but also on their corresponding values.

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