Results 151 to 160 of about 712 (184)

Selective use of a modified presynchronization-Ovsynch and resynchronization reproductive strategy in dairy herds: A field application study.

Reproduction in domestic animals = Zuchthygiene, 2021
We aimed to evaluate whether a modified presynchronization-Ovsynch (MPO) and resynchronization method, adjusted for the timing of biweekly reproductive consulting visits, could be implemented successfully under field conditions in dairy herds. Forty-five
Jaekwan Jeong, U. Kim, Hyun-Gu Kang, Illhwa Kim   +3 more
semanticscholar   +1 more source

115 Presynchronization and reutilization of progesterone devices during a 6-day CO-Synch protocol for fixed-time artificial insemination in beef heifers

Reproduction, Fertility and Development, 2021
Ovulatory response to the initial gonadotrophin-releasing hormone (GnRH) of the CO-Synch protocol is affected by circulating progesterone (P4) and follicle size. In addition, heifers that ovulate to initial GnRH treatment have greater fertility after AI.
E. Canadas, B. Duran, G. Machado, A. Nall, S. E. Battista, M. Mussard, P. Baruselli, A. García-Guerra   +7 more
semanticscholar   +1 more source

Transient Stability Analysis of Grid-Forming Converters During Presynchronization Process in Islanded Mode

IEEE transactions on power electronics
Power synchronization control (PSC) is usually used for power distribution and grid synchronization of grid-forming converters. Yet, the sequential startup of PSC for paralleled converters will cause an active power mismatch between converters and load ...
Yi Yuan, Junpeng Ma, Shun-Liang Wang, Peng Wang, Tian-Qi Liu   +4 more
semanticscholar   +1 more source

Presynchronization control for ship microgrid of merchant marine inverters based on VSG algorithm with MFAC

Transactions of the Institute of Measurement and Control
The paper studies a presynchronization control of grid connection for large merchant marine microgrid inverters. We present a virtual synchronous generator (VSG) algorithm with model-free adaptive control (MFAC) to optimize the stable grid connection of ...
Wen-Long Yao, Chun-ming Pei, Rong-Hu Chi, Wei Shao, Boyang Li   +4 more
semanticscholar   +1 more source

Presynchronization with prostaglandin F2α and prolonged exposure to exogenous progesterone impacts estrus expression and fertility in beef heifers.

Theriogenology, 2020
To determine the effects of two presynchronization strategies in conjunction with delayed fixed-time artificial insemination (TAI) on pregnancy rates to TAI (PR/AI), 1700 Angus beef heifers at three locations in South Dakota were enrolled in a completely
N. Oosthuizen, P. Fontes, K. Porter, G. C. Lamb   +3 more
semanticscholar   +1 more source

Improved Presynchronization Control Method Based on Phase-angle Difference Jump Elimination

2024 6th International Conference on Power and Energy Technology (ICPET)
The pre-synchronization strategy based on phase angle difference control can inhibit the control of pre-synchronization due to the periodic jumps in phase angle difference, which can lead to system instability in severe cases.
Qun Li, Weijia Tang, Chenggen Wang, Qiang Li   +3 more
semanticscholar   +1 more source

Presynchronization with CIDR, with or without GnRH, prior to CO-Synch in beef heifers.

Theriogenology, 2020
Objectives were to compare ovarian responses and pregnancy per AI (P/AI) in Angus-cross beef heifers (n = 521; 4 locations) synchronized with CIDR-CO-Synch (CCOS) versus CIDR-GnRH-CO-Synch (CGCOS) protocols.
K. Ratzburg, K. Jorgensen-Muga, Jeeviya Murugesan, J. Kastelic, V. Kasimanickam, R. Kasimanickam   +5 more
semanticscholar   +1 more source

Improved presynchronization control strategy based on virtual synchronous generator without PLL

9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)
Virtual Synchronous Generator (VSG) has similar external characteristics to traditional synchronous generator, which helps to overcome the phenomenon of inertia attenuation when the power is connected to the grid, but also has the phenomenon of large ...
Siyang Chen, Di Bai, Tianshu Zhang
semanticscholar   +1 more source

Presynchronization strategy using prostaglandin F2α, gonadotropin-releasing hormone, and detection of estrus to improve fertility in a resynchronization program for dairy cows.

Theriogenology, 2019
Objectives of experiment 1 were to evaluate pregnancy outcomes and reinsemination patterns of cows whose estrous cycles or ovulation were presynchronized with prostaglandin (PGF2α) or PGF2α and gonadotropin-releasing hormone (GnRH) after non-pregnancy ...
L. Mendonça, L. Rocha, B. Voelz, G. T. Lima, Alexandre L. A. Scanavez, Jeffrey S. Stevenson   +5 more
semanticscholar   +1 more source

Presynchronization by induction of a largest follicle using a progesterone device in GnRH-based-ovulation synchronization protocol in crossbred dairy cows.

Theriogenology, 2018
The objective was to compare the fertility of dairy cows using a presynchronization protocol by induction of a largest follicle using a progesterone intravaginal device prior to an Ovsynch protocol (P4synch) with the Double-Ovsynch in lactating dairy ...
L. A. C. L. Silva, L. M. Simões, M. P. Bottino, A. P. C. Santos, G. Santos, I. H. Martínez, J. Souza, P. Baruselli, J. Sales   +8 more
semanticscholar   +1 more source