Effect of bale feeder and forage on hay waste, disappearance, and sorting11This project was funded by the University of Missouri Agriculture Experiment Station2Present address: Buchheit Agri Inc., Perryville, MO 63775.

ABSTRACTThree feeders and 2 forage types were used in a 3 × 2 factorial treatment arrangement within a Latin-square design to evaluate forage feeding waste. A total of 48 spring-calving, gestating cows were stratified by age, BW, and BCS into 6 replicate pens with 8 cows per pen. Bale feeders evaluated were open ring with slanted feeding stations (OFD), sheeted lower section with slanted feeding stations and tapered sides (TFD), and sheeted lower and upper sections with straight feeding stations and a chain cone (CFD). Forages were alfalfa (Medicago sativa L.) haylage (AH) or tall fescue (Festuca arundinacea Schreb.) hay (FH). A forage × feeder type interaction (P < 0.05) was observed for percentage of bale wasted, where FH OFD was greatest (19.2%), FH TFD was intermediate (13.6%), and FH CFD (8.9%) was least (P < 0.05); however, FH CFD was not different (P > 0.10) from AH OFD (7.0%) or AH CFD (6.5%) but was greater than AH TFD (4.9%; P < 0.05). A feeder × forage × day interaction (P < 0.01) was observed for waste per day bale was offered. No difference (P > 0.10) was observed for percentage AH waste due to day or feeder. Fescue-hay waste was least (P < 0.01) in CFD at 24 and 48 h compared with OFD and TFD. At 96 h, TFD wasted the least (P < 0.05) for FH compared with CFD and OFD. The CFD feeder with lower-section sheeting reduced FH waste, whereas AH waste was not influenced by feeder design

Economics Research in Canada: A Long-Run Assessment of Journal Publications

We examine the publications of authors affiliated with an economics research institution in Canada in (i) the Top-10 journals in economics according to journals’ impact factors, and (ii) the Canadian Journal of Economics. We consider all publications in the even years from 1980 to 2000. Canadian economists contributed about 5% of publications in the Top-10 journals and about 55% of publications in the Canadian Journal of Economics over this period. We identify the most active research centres and identify trends in their relative outputs over time. Those research centres successful in publishing in the Top-10 journals are found to also dominate the Canadian Journal of Economics. Additionally, we check the robustness of our findings with respect to journal selection, and we present data on authors’ Ph.D.- origin, thereby indicating output and its concentration in graduate education

Barrier Formation in the Human Fetus is Patterned

We recently demonstrated patterned stratum corneum maturation and skin barrier formation during fetal development in rodents and rabbit. The presence of skin patterning in these mammals led us to predict patterned barrier formation during human infant development. Here we extend our mammalian study and demonstrate patterned stratum corneum development and skin barrier formation in the pre-term human infant. Surprisingly, we show initiation of human barrier regionally as early as 20–24 wk gestational age (22–26 wk menstrual age), bringing barrier formation close to the time of periderm disaggregation. We use the mouse model to show that patterns of periderm disaggregation mirrors barrier formation. Periderm disaggregation follows and recapitulates barrier pattern, suggesting a relationship between the processes. This work reveals regional patterning in skin maturation and barrier formation in the human infant and demonstrates that initiation of human skin barrier formation in utero coincides with the current lower limit of viability of the pre-term infant

The Effects of Thrombus, Thrombectomy and Thrombolysis on Endothelial Function

AbstractObjective: this study was undertaken to examine and compare the effects of thrombus, thrombectomy, and thrombolysis on endothelial function as measured by endothelium-dependent vasorelaxation (EDR). Methods: adult, male New Zealand white rabbits underwent ligation of the left common iliac to femoral artery to induce thrombosis and were then randomly assigned to one of five groups, n=6 in each. Group A consisted of ligation and thrombosis for 4 h. Group B underwent similar ligation for 4 h, but without intraluminal thrombus present. Following 4 h of ligation and thrombosis, Group C underwent thrombectomy while group D was treated with urokinase (UK), 4000 U/min for 30 min. Group E underwent UK infusion alone. The right external iliac artery served as control vessel in each group. All arteries were removed and endothelial function was determined by measuring EDR. Results: the presence of thrombus reduced EDR by 50% (group A) compared to control. Vessels with interrupted flow, but not exposed to thrombus, retained normal EDR (group B). Thrombectomy decreased EDR significantly (group C) compared to thrombolysis (group D) and control. UK did not significantly alter EDR (groups D, E).Conclusions: exposure of endothelium to thrombus significantly decreases EDR. EDR was not affected by interruption of blood flow in the absence of thrombus. Thrombectomy appeared to cause a further additive insult to the endothelium. In contrast, thrombolysis with UK preserved residual endothelial function. These data suggest that it is important to differentiate the effects of thrombus on endothelium from effects due to thrombectomy or thrombolysis when evaluating treatment modalities for arterial thrombosis

Historic Kent: The Value of the County's Heritage Sector

The report builds on the data brought together in the RSA Heritage Index (2020). It identifies four key heritage themes in Kent: coastal heritage; Christian heritage; historic houses; and natural heritage and historic landscapes. These themes embrace elements such as the Roman forts of the Saxon Shore; Dover Castle; the artillery forts of Henry VIII; coastal resorts; the UNESCO World Heritage site of Canterbury; the cathedral city of Rochester; historic houses including Knole and Chartwell; and the Kent Downs Area of Outstanding Natural Beauty (AONB). Three case studies relating to local authorities are presented: Canterbury, Dover, and Folkestone and Hythe. These show how each of the areas has been able to use its heritage assets to develop its tourism economy, and to attract significant funding from the NLHF. A summary of the key themes of heritage strategies from local authorities across Kent is provided to indicate how local heritage assets are perceived as part of their local communities. A consideration of the social benefits of heritage includes a reflection on the UK Government’s Levelling-Up agenda and its interaction with the heritage sector. The economic benefits of heritage are underlined by the scale of NLHF awards made to projects in Kent, as well as the value of tourism, in part driven by heritage attractions and assets. Heritage projects in Kent were awarded over £79 million in grants from NLHF from 2013 to 2020. The largest amounts were for £13.7 million for the Canterbury Journey awarded to Canterbury Cathedral, £4.8 million for Chatham Historic Dockyard Trust, £4.6 million for the Maison Dieu in Dover, £4.6 million for the Sheerness Dockyard Church project, and £3.4 million for Chartwell. The COVID-19 pandemic has caused a major fall in income from tourism for the county from £4.1 billion in 2019 to £1.6 billion in 2020. This included a fall of 61 per cent on day trips, and 60 per cent on overnight trips. This had an impact on employment in the tourism sector accounting for a drop of 39 per cent to 50,026 individuals. The fall in income due to the pandemic is particularly noticeable for Canterbury with a loss of over £300 million, while Medway and Thanet both saw losses over around £200 million. The report reflects on the challenges facing heritage in Kent. In particular, it considers the way that the public have been engaging with built heritage, museums, and archives. Solutions include integrating the historic built environment with related objects and documents that can be found in museums and archives within the county

Neuropsychological constraints to human data production on a global scale

Which are the factors underlying human information production on a global level? In order to gain an insight into this question we study a corpus of 252-633 Million publicly available data files on the Internet corresponding to an overall storage volume of 284-675 Terabytes. Analyzing the file size distribution for several distinct data types we find indications that the neuropsychological capacity of the human brain to process and record information may constitute the dominant limiting factor for the overall growth of globally stored information, with real-world economic constraints having only a negligible influence. This supposition draws support from the observation that the files size distributions follow a power law for data without a time component, like images, and a log-normal distribution for multimedia files, for which time is a defining qualia.Comment: to be published in: European Physical Journal

Accidental Degeneracy and Berry Phase of Resonant States

We study the complex geometric phase acquired by the resonant states of an open quantum system which evolves irreversibly in a slowly time dependent environment. In analogy with the case of bound states, the Berry phase factors of resonant states are holonomy group elements of a complex line bundle with structure group C*. In sharp contrast with bound states, accidental degeneracies of resonances produce a continuous closed line of singularities formally equivalent to a continuous distribution of "magnetic" charge on a "diabolical" circle, in consequence, we find different classes of topologically inequivalent non-trivial closed paths in parameter space.Comment: 23 pages, 2 Postscript figures, LaTex, to be published in: Group 21: Symposium on Semigroups and Quantum Irreversibility (Proc. of the XXI Int. Colloquium on Group Theoretical Methods in Physics

Generation of atom-photon entangled states in atomic Bose-Einstein condensate via electromagnetically induced transparency

In this paper, we present a method to generate continuous-variable-type entangled states between photons and atoms in atomic Bose-Einstein condensate (BEC). The proposed method involves an atomic BEC with three internal states, a weak quantized probe laser and a strong classical coupling laser, which form a three-level Lambda-shaped BEC system. We consider a situation where the BEC is in electromagnetically induced transparency (EIT) with the coupling laser being much stronger than the probe laser. In this case, the upper and intermediate levels are unpopulated, so that their adiabatic elimination enables an effective two-mode model involving only the atomic field at the lowest internal level and the quantized probe laser field. Atom-photon quantum entanglement is created through laser-atom and inter-atomic interactions, and two-photon detuning. We show how to generate atom-photon entangled coherent states and entangled states between photon (atom) coherent states and atom-(photon-) macroscopic quantum superposition (MQS) states, and between photon-MQS and atom-MQS states.Comment: 9 pages, 1 figur

Updated tests of scaling and universality for the spin-spin correlations in the 2D and 3D spin-S Ising models using high-temperature expansions

We have extended, from order 12 through order 25, the high-temperature series expansions (in zero magnetic field) for the spin-spin correlations of the spin-S Ising models on the square, simple-cubic and body-centered-cubic lattices. On the basis of this large set of data, we confirm accurately the validity of the scaling and universality hypotheses by resuming several tests which involve the correlation function, its moments and the exponential or the second-moment correlation-lengths.Comment: 21 pages, 8 figure

Precise calculation of parity nonconservation in cesium and test of the standard model

We have calculated the 6s-7s parity nonconserving (PNC) E1 transition amplitude, E_{PNC}, in cesium. We have used an improved all-order technique in the calculation of the correlations and have included all significant contributions to E_{PNC}. Our final value E_{PNC} = 0.904 (1 +/- 0.5 %) \times 10^{-11}iea_{B}(-Q_{W}/N) has half the uncertainty claimed in old calculations used for the interpretation of Cs PNC experiments. The resulting nuclear weak charge Q_{W} for Cs deviates by about 2 standard deviations from the value predicted by the standard model.Comment: 24 pages, 8 figure