Productivity of bermudagrass and fescue pasture combinations for steers with clover or nitrogen fertilization

A beef backgrounding pasture experiment was conducted on a Typic Hapludalfs soil to measure forage and steer production from seven (1.2-ha/ experimental unit) pasture treatments: (1) \u27Midland\u27 bermudagrass (Cynodon dactyl on (L.) Pers.) + Ladino clover (Trifolium repens L.) [Midland + clover]; (2) Midland + 224 kg N/ha [Midland + N]; (3) 0.4 ha Midland + N-0.8 ha of tall fescue (Festuca arundinacea Schreb.) + N [Midland (0.4 ha)-fescue (0.8 ha)]; (4) Midland + fescue + N [Midland + fescue]; (5) Common bermudagrass (Cynodon dactyl on var. dactyl on) + 224 kg N/ha [Common + N]; (6) Fescue + clover; and (7) Orchardgrass (Dactylis glomerata L.) + clover [Ore. + clover]. The pastures were replicated twice and grazed with a modified put-and-take system. Yearling steers weighing about 230 kg in spring grazed up to 150 days. Forage and steer data were taken every three weeks. A species composi tion index (SCI) was developed to describe each pasture each time with a unique symbol; it was a sensitive tool for characterizing dynamically changing pasture compositions. Forage consumption was 80% or more of estimated growth, which was 4000 to 8300 kg/ha. Crude protein was sufficient to meet minimum requirements for growing steers. Fescue or clover, which were successfully introduced and maintained in Midland sods, extended the grazing season, and the resulting combinations produced more forage than Midland + N alone. Stocking rates ranged from four to seven steers/ha. Average daily gains (ADG) were about 475 to 575 g for all treatments except for Ore. + clover (825 g). Productivity ranged between 520 grazing iv V days/ha/season for Ore. + clover to 1190 for Midland + fescue; most were 730 to 880 grazing days/ha. Daily forage dry matter intake was five to seven kg/steer in all pastures, with intake efficiencies of 9 to 13 kg/kg gain. Beef production was 390, 412, 456, 485, 505, 515, and 720 kg/ha for Fescue + clover. Common + N, Midland (0.4 ha)-fescue (0.8 ha). Midland + clover. Ore. + clover. Midland + N, and Midland + fescue, respectively. Models were developed to identify concomitant variables such as stocking rate/21-day sampling period, season (spring or summer), year, days/period, crude protein, and precipitation in addition to the classification variables treatments or SCI, that could account for variability in the dependent variables. When treatments was entered in the model, R^\u27s of 0.26, 0.43, 0.58, and 0.44 were obtained for forage growth, forage consumption, ADG and beef production, respectively; when SCI was used, they were 0.40, 0.52, 0.68, and 0.55

Capturing and Handling of White Whales (Delphinapterus leucas) in the Canadian Arctic for Instrumentation and Release

For many decades, humans have captured white whales (Delphinapterus leucas) for food, research, and public display, using a variety of techniques. The recent use of satellite-linked telemetry and pectoral flipper band tags to determine the movements and diving behaviour of these animals has required the live capture of a considerable number of belugas. Three principal techniques have been developed; their use depends on the clarity and depth of the water, tidal action, and bottom topography in the capture area. When the water is clear enough so that the whales can be seen swimming under the water and herded into shallow sandy areas, a hoop net is placed over the whale's head from an inflatable boat. When the water is murky and the belugas cannot easily be seen under the water, but can be herded into relatively shallow sandy areas, a seine net is deployed from a fast-moving boat to encircle them. If the whales are in deep water and cannot be herded into shallow water, a stationary net is set from shore to entangle them. Once captured, the whales have to be restrained in a way that allows them to breathe easily, have the tags attached, and be released as quickly as possible. The methods have proved to be safe, judging from the whales' rapid return to apparently normal behavioural patterns.Durant de nombreuses décennies, l'homme s'est livré à la capture des baleines blanches (Delphinapterus leucas) à l'aide de diverses techniques, dans le but de se nourrir, de faire de la recherche et d'exposer publiquement ces animaux. L'utilisation récente de la télémesure en liaison avec un satellite et des rubans-sondes fixés sur les nageoires pectorales pour déterminer les déplacements et le comportement en plongée de ces animaux a nécessité la capture vivante d'un grand nombre de bélougas. On a recouru à trois techniques principales, dont l'utilisation dépend de la clarté et de la profondeur de l'eau, de l'action des marées et de la topographie du fond dans la zone de capture. Quand l'eau est assez claire pour qu'on voie les baleines nager sous la surface et qu'on puisse les rabattre dans des zones sableuses peu profondes, on place un verveux sur la tête de la baleine depuis un canot pneumatique. Quand l'eau est trouble et qu'on ne distingue pas bien les bélougas sous la surface tout en pouvant les rabattre vers des zones sableuses de profondeur relativement faible, on déploie une senne depuis un bateau qui se déplace à grande vitesse pour les encercler. Si les baleines sont en eau profonde et qu'on ne peut les rabattre dans de l'eau peu profonde, on installe un filet fixe depuis le rivage pour qu'elles s'y prennent. Une fois capturées, les baleines doivent être maîtrisées de telle façon que leur respiration n'est pas entravée; il faut ensuite fixer les sondes sur les animaux, qu'on doit relâcher le plus rapidement possible. Si l'on en juge par le retour rapide des baleines à des schémas de comportement normal, ces méthodes se révèlent sécuritaires

Predicting C-H/π\pi interactions with nonlocal density functional theory

We examine the performance of a recently developed nonlocal density functional in predicting a model noncovalent interaction, the weak bond between an aromatic $\pi$ system and an aliphatic C-H group. The new functional is a significant improvement over traditional density functionals, providing results which compare favorably to high-level quantum-chemistry techniques but at considerably lower computational cost. Interaction energies in several model C-H/$\pi$ systems are in generally good agreement with coupled-cluster calculations, though equilibrium distances are consistently overpredicted when using the revPBE functional for exchange. The new functional correctly predicts changes in energy upon addition of halogen substituents.Comment: 5 pages, 4 figure

Advanced Thermal Simulator Testing: Thermal Analysis and Test Results

Work at the NASA Marshall Space Flight Center seeks to develop high fidelity, electrically heated thermal simulators that represent fuel elements in a nuclear reactor design to support non-nuclear testing applicable to the development of a space nuclear power or propulsion system. Comparison between the fuel pins and thermal simulators is made at the outer fuel clad surface, which corresponds to the outer sheath surface in the thermal simulator. The thermal simulators that are currently being tested correspond to a SNAP derivative reactor design that could be applied for Lunar surface power. These simulators are designed to meet the geometric and power requirements of a proposed surface power reactor design, accommodate testing of various axial power profiles, and incorporate imbedded instrumentation. This paper reports the results of thermal simulator analysis and testing in a bare element configuration, which does not incorporate active heat removal, and testing in a water-cooled calorimeter designed to mimic the heat removal that would be experienced in a reactor core

Video Guidance Sensor for Surface Mobility Operations

Robotic systems and surface mobility will play an increased role in future exploration missions. Unlike the LRV during Apollo era which was an astronaut piloted vehicle future systems will include teleoperated and semi-autonomous operations. The tasks given to these vehicles will run the range from infrastructure maintenance, ISRU, and construction to name a few. A common task that may be performed would be the retrieval and deployment of trailer mounted equipment. Operational scenarios may require these operations to be performed remotely via a teleoperated mode,or semi-autonomously. This presentation describes the on-going project to adapt the Automated Rendezvous and Capture (AR&C) sensor developed at the Marshall Space Flight Center for use in an automated trailer pick-up and deployment operation. The sensor which has been successfully demonstrated on-orbit has been mounted on an iRobot/John Deere RGATOR autonomous vehicle for this demonstration which will be completed in the March 2008 time-frame

Enhanced in-plane anisotropy and ferromagnetic resonance frequency in permalloy films laminated with nitrogen-doped tantalum

Soft magnetic materials are used in integrated power magnetic devices (such as micro-inductors and microtransformers) to achieve reasonable inductances at frequencies over a few megahertz. However, the out-of-plane (perpendicular) anisotropy, in thick films produced by vapor deposition, worsens the in-plane soft magnetic properties. This paper reports on the nano-lamination of Permalloy (Ni81Fe19) thin films with the introduction of nitrogen-doped tantalum in between to eliminate the out-of-plane anisotropy and improve the in-plane anisotropy. This significantly improves the in-plane soft magnetic properties, reducing the coercivity from 1352 A/m to 25.5 A/m and increasing the anisotropy field from 180 A/m to 660 A/m. The high-frequency permeability was uniform up to 500 MHz, and the ferromagnetic resonance (FMR) frequency was increased to 1 GHz. These properties are ideal for high efficiency magnetic applications at high frequencies and an extended FMR frequency is imperative for gigahertz-range devices

Red-Cockaded Woodpecker Status and Management: West Gulf Coastal Plain and Interior Highlands

Red-cockaded woodpecker populations declined precipitously following European settlement and expansion and cutting of the original pine forests across the southeastern United States. By 1990 most residual populations lacked demographic viability, existed in degraded habitat, and were isolated from other populations. The primary causes of this situation were harvest of the original pine forests of the southeastern United States, conversion of forested lands to other uses, short-rotation silvicultural practices, and alteration of the fire regime in the regenerated forests. As social and legal mandates changed, management of red-cockaded woodpeckers became a higher priority. Intensive management for red-cockaded woodpeckers is currently practiced on most public and a few private lands that still support populations. Recent population trends and the current status of red-cockaded woodpeckers in Oklahoma, Arkansas, Texas, and Louisiana reflect historical factors and the efficacy of recent management

Prospectus, April 26, 1977

VOTE TODAY-TOMORROW: FOUR VIE FOR PRES. IN STU-GO ELECTION; Remus, Mayeda run for V.P.; Albert Dodson unopposed; Activities Day May 3; Letters to the editor: Pres. Praises carnival, Mayeda warns of lies, Cartoon good…but, Stu-Go made many contributions: Onley; Editorial: Trouble for athletics; Hackett vs. Slack for convo., Cox opposes Stoeber for IOC; Unopposed: Propeck runs alone for secretary; Thursday set for wheel chair awareness; State provides funding for food sanitation course; Law Enforcement Club sponsors Mk\u27t Place fair; Markland: bigger not better for Twin City police force; Energy saving tips: Ripple effect causes waste; Police Chief Dye: \u27Recruitment-lifeline of police dep\u27t.\u27; Bike race today; Blooming Idiots come out of woodwork for IOC Carnival; Workshop set for Saturday: Puppetmaster Schmidt displays at PC; Afro American Theatre Workshop starts at PC; \u27Alcohol, sophisticated, sexy?\u27; Bike tour Sunday, May 1; Classifieds; Bat girls provide needed help for baseball team; Cobras expand record with 3rd no-hitter; Lincolnland doubleheader tomorrow: Women\u27s softball season nears end; June 7-10: Mudrock headed to JC golf nationalshttps://spark.parkland.edu/prospectus_1977/1018/thumbnail.jp

The Changing Landscape for Stroke\ua0Prevention in AF: Findings From the GLORIA-AF Registry Phase 2

Background GLORIA-AF (Global Registry on Long-Term Oral Antithrombotic Treatment in Patients with Atrial Fibrillation) is a prospective, global registry program describing antithrombotic treatment patterns in patients with newly diagnosed nonvalvular atrial fibrillation at risk of stroke. Phase 2 began when dabigatran, the first non\u2013vitamin K antagonist oral anticoagulant (NOAC), became available. Objectives This study sought to describe phase 2 baseline data and compare these with the pre-NOAC era collected during phase 1. Methods During phase 2, 15,641 consenting patients were enrolled (November 2011 to December 2014); 15,092 were eligible. This pre-specified cross-sectional analysis describes eligible patients\u2019 baseline characteristics. Atrial fibrillation disease characteristics, medical outcomes, and concomitant diseases and medications were collected. Data were analyzed using descriptive statistics. Results Of the total patients, 45.5% were female; median age was 71 (interquartile range: 64, 78) years. Patients were from Europe (47.1%), North America (22.5%), Asia (20.3%), Latin America (6.0%), and the Middle East/Africa (4.0%). Most had high stroke risk (CHA2DS2-VASc [Congestive heart failure, Hypertension, Age  6575 years, Diabetes mellitus, previous Stroke, Vascular disease, Age 65 to 74 years, Sex category] score  652; 86.1%); 13.9% had moderate risk (CHA2DS2-VASc = 1). Overall, 79.9% received oral anticoagulants, of whom 47.6% received NOAC and 32.3% vitamin K antagonists (VKA); 12.1% received antiplatelet agents; 7.8% received no antithrombotic treatment. For comparison, the proportion of phase 1 patients (of N = 1,063 all eligible) prescribed VKA was 32.8%, acetylsalicylic acid 41.7%, and no therapy 20.2%. In Europe in phase 2, treatment with NOAC was more common than VKA (52.3% and 37.8%, respectively); 6.0% of patients received antiplatelet treatment; and 3.8% received no antithrombotic treatment. In North America, 52.1%, 26.2%, and 14.0% of patients received NOAC, VKA, and antiplatelet drugs, respectively; 7.5% received no antithrombotic treatment. NOAC use was less common in Asia (27.7%), where 27.5% of patients received VKA, 25.0% antiplatelet drugs, and 19.8% no antithrombotic treatment. Conclusions The baseline data from GLORIA-AF phase 2 demonstrate that in newly diagnosed nonvalvular atrial fibrillation patients, NOAC have been highly adopted into practice, becoming more frequently prescribed than VKA in Europe and North America. Worldwide, however, a large proportion of patients remain undertreated, particularly in Asia and North America. (Global Registry on Long-Term Oral Antithrombotic Treatment in Patients With Atrial Fibrillation [GLORIA-AF]; NCT01468701