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Gulay, M.S.,Hayen, M.J.,Bachman, K.C.,Head, H.H. Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.1
Eighty-four Holstein cows were used to evaluate effects of feeding two diets that differed in dietary cation-anion difference (cationic; +28 or anionic; -138 mEq/kg DM) on prepartum and postpartum dry matter intake (DMI), body weight (BW), body condition score (BCS), serum Ca concentrations and on subsequent milk production and composition. Treatments were in a $2{\times}3{\times}2$ factorial arrangement that included prepartum diet, dry period length (30 d dry, 30 d dry+estradiol cypionate (ECP), and 60 d dry), and prepartum and postpartum bST ($POSILAC^{(R)}$ 10.2 mg/d). No interaction of prepartum diet with dry period length or bST supplementation was detected for any measure evaluated either prepartum or postpartum. No significant effects of prepartum diet on prepartum DMI, BW or BCS were observed. Mean DMI during the first 28 d postpartum were similar for cows fed the cationic or anionic diets prepartum (25.5 vs. 26.1 kg/d). During postpartum wk 1 to 14, no differences in mean BW or BCS were detected due to prepartum diet fed but decreases for both groups were observed during the first 6 wk postpartum. No differences due to prepartum diet were observed for mean milk or 3.5% FCM yields or for milk composition during the first 10 wk of lactation. Similarly, mean milk yield of cows during the first 21 wk did not differ significantly due to prepartum diet fed (38.5 vs. 38.6 kg/d). Overall, cows fed the prepartum cationic or anionic diets had similar mean postpartum serum concentrations of Ca (9.34 vs. 9.35 mg/dl). Subsequent milk production, milk composition and concentrations of Ca did not differ. Importantly, the two prepartum diets were equally satisfactory in minimizing incidence of milk fever and in supporting initiation of lactation, irrespective of dry period length and supplemental ECP and bST.
Oh, C.O.,Jodice, L.W.,Bachman, J.R.,Hammitt, W.E. Elsevier Applied Science 2016 Ocean & coastal management Vol.130 No.-
This study used choice modeling to assess demand by saltwater anglers and non-anglers, visiting the South Carolina coast, for value-added experiences and services associated with charter boat trips. Diverse non-fishing trip attributes including onboard amenities, onshore activities, quality of captain and crew, onboard nature-based tourism, onboard culture-based tourism and interpretation and education services were tested. Sampling of saltwater, recreational fishing, license owners and coastal tourists in 2013 produced 544 surveys (anglers = 277, non-anglers = 267). Study results showed that both groups placed importance on Quality of Captain and Crew, Onboard Amenities and Boat Fee. Only non-anglers placed importance on Onboard Nature-based Tourism. The marginal willingness to pay of Quality of Captain and Crew (high level) was $115 for anglers and $69 for non-anglers and of Onboard Amenities (high level) was $41 for anglers and $63 for non-anglers.
Dual-Active-Bridge Converter with Triple Phase Shift Control for a Wide Operating Voltage Range
Yi-Hsuan Chen,Ta-Wei Huang,Shih-Hao Kuo,Yu-Chen Chang,Huang-Jen Chiu,Serafin Bachman,Marek Jasi?ski 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
An optimal modulation scheme with Triple-Phase-Shift (TPS) control that increase efficiency in the whole load range is presented for a Dual Active Bridge (DAB) converter under wide output voltage range conditions. This paper provides a comprehensive analysis of the DAB with TPS modulation, identifying all the switching modes to operate the DAB where expressions for the transfer functions, the peak inductor current and RMS inductor current are provided. An analysis of minimum Peak Current and minimum RMS Current Control also are investigated. On this basic all-ZVS modulation scheme is originally proposed to improve light-load efficiency and to reduce the switching losses. A 15 kW prototype circuit is applied, and experimental results are presented to validate that the modulation and efficiency improvement are realized by applying the optimized modulation scheme. The experimental results also verify the effectiveness of the closed-loop control strategy.