1,209 research outputs found
Ceramic possibilities of some Missouri clays and shales
Although many of the shales and clays of Missouri have in the past been, or are presently being used for the manufacture of heavy clay products such as face brick, common brick, sewer pipe, and tile, there is in these post-war years a significant shortage of these products within the state and country. Especially in the northwestern part of Missouri is there a distinct shortage, as only one structural clay plant is known to be operating in that area. The St. Louis and Southeastern Missouri districts are better prepared to meet construction demands, with several structural clay plants operating at peak capacity in these areas. An investigation of the ceramic possibilities of some of the shales and clays of Northwest and Southeast Missouri would serve to indicate whether the manufacture of structural clay products such as common and face brick, tile and sewer pipe, could be accomplished --Introduction, page 1
Konsert - Fantasi : Syenska Folkvisor
https://digitalcommons.library.umaine.edu/mmb-ps/3543/thumbnail.jp
Cocklebur and velvetleaf interference in soybeans.
Dept. of Biological Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1984 .L377. Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.Sc.)--University of Windsor (Canada), 1984
TRANSIENT SWAINSON’S THRUSH (CATHARUS USTULATUS) WINTERING IN THE ANDEAN FOOTHILLS OF ECUADOR ARE ALMOST EXCLUSIVELY YOUNG MALES
We know relatively little about the non-breeding period of most migratory birds. Decades of research on Swainson’s Thrush (Catharus ustulatus) has focused on their breeding ecology, whereas their non-breeding ecology is limited to broad patterns of distribution and migratory stop-over ecology. For the nearly 50 years, the US Breeding Bird Survey recorded declines of 0.7% per year for the Russet-backed Swainson’s Thrush (C. u. swainsonii) subspecies, which spends the non-breeding period in South America. However, there is an insufficient understanding of the constraints across their annual cycle to determine reasons for the sustained decline. In 2013 and 2014, we examined their little studied non-breeding period on the Andean slopes of Ecuador where prior experience showed that they were seasonally abundant. Here rapid deforestation threatens primary forest. We used point counts and radio telemetry to evaluate whether primary forest was used preferentially to recently regenerated second-growth forest. From point counts, 76% of detections and almost all captured individuals occurred in secondary forest. Of 86 birds captured in mist nets, 85 were males and 83 young of the year, indicating a highly skewed ratio in favor of young males. Radio telemetry demonstrated preference for secondary forest, especially for fruiting Cecropia spp. trees, with no apparent territorial behavior by those tracked and with short residency times. A marked decrease in density over the course of the field season suggests an itinerant population possibly tracking the ephemeral use of fruit resources. Alternatively, these temporal and spatial patterns could suggest that this population undergoes a mid-winter intratropical migration or at least landscape-level movements. However, we observed thrushes throughout our extended sampling period suggesting transiency with high turnover. Together, this study documents demographic separation during the non-breeding period with preference for of secondary forest and high transiency, important findings in informing management across the annual cycle
Evaluating Communication Tools and Increasing Fruit and Vegetable Consumption in Vermont Head Start Classrooms
Introduction:
We designed a program for four Head Start classrooms that aimed to: 1) Provide classrooms a tool that would facilitate communication with families about nutrition, 2) Educate families about the MyMeal tool, and 3) Increase fruit and vegetable consumption by providing families with fresh fruits and vegetables Fruit and vegetables are important components of a healthy diet, and sufficient consumption helps reduce the risk of developing cardiovascular disease, cancer, diabetes and obesity. Eating behaviors during childhood are highly parentally influenced and function as the foundation for future eating patterns. Studies have shown that the extent to which fruits and vegetables are present and accessible in the home correlates with the amount of fruit and vegetables eaten by children.https://scholarworks.uvm.edu/comphp_gallery/1210/thumbnail.jp
Hypervelocity Collisions of Binary Stars at the Galactic Centre
Recent surveys have identified seven hypervelocity stars (HVSs) in the halo
of the Milky Way. Most of these stars may have originated from the breakup of
binary star systems by the nuclear black hole SgrA*. In some instances, the
breakup of the binary may lead to a collision between its member stars. We
examine the dynamical properties of these collisions by simulating thousands of
different binary orbits around SgrA* with a direct N-body integration code. For
some orbital parameters, the two stars collide with an impact velocity lower
than their escape velocity and may therefore coalesce. It is possible for a
coalescing binary to have sufficient velocity to escape the galaxy.
Furthermore, some of the massive S-stars near Sgr A* might be the merger
remnants of binary systems, however this production method can not account for
most of the S-stars.Comment: 5 pages, 2 figures, accepted for publication in MNRA
Preference and Nutrition of Quail Breeder 16, Common Agricultural Feeds, and a Mix of Native Seeds as Northern Bobwhite Food
Agricultural feeds are commonly dispersed along roads or in openings as an attractant or dietary supplement for northern bobwhites (Colinus virginianus). Quail Breeder 16e is a pelletized ration specifically developed by Lyssy & Eckel Feeds for breeding bobwhites to maximize nutritive content of diets. Captive bobwhites were used to examine relative preference of the pellets, sorghum, corn, soybean, and a mix of seeds of 8 native plant species. Protein, fat, acid detergent fiber, gross energy, and mineral content of the feeds were measured and we examined changes in body mass of bobwhites fed exclusive diets of each of the five feeds. A Latin rectangle experimental design with single and multiple-offer treatments was used to compare feed preference. Sorghum was most highly preferred in both the single and multiple offering experiments. Soybeans and the pelletized ration were least preferred. The native seed mix and corn were intermediate in preference. Nutritionally, soybeans had the highest protein (40%), highest fat (19%), and highest gross energy (21 kJ/g). Bobwhites fed exclusive diets of the native seed mix exhibited the greatest increase in body mass (40%), and birds fed the sorghum diet had the greatest decrease in body mass ( 8%). Providing supplements (pelletized rations and agricultural feeds) should not take precedence over managing bobwhite habitat to produce a variety of native grasses and forbs when improving bobwhite nutrition is a management objective
Very massive runaway stars from three-body encounters
Very massive stars preferentially reside in the cores of their parent
clusters and form binary or multiple systems. We study the role of tight very
massive binaries in the origin of the field population of very massive stars.
We performed numerical simulations of dynamical encounters between single
(massive) stars and a very massive binary with parameters similar to those of
the most massive known Galactic binaries, WR 20a and NGC 3603-A1. We found that
these three-body encounters could be responsible for the origin of high
peculiar velocities ( 70 km/s) observed for some very massive (
60-70 Msun) runaway stars in the Milky Way and the Large Magellanic Cloud
(e.g., Cep, BD+43 3654, Sk-67 22, BI 237, 30 Dor 016), which can
hardly be explained within the framework of the binary-supernova scenario. The
production of high-velocity massive stars via three-body encounters is
accompanied by the recoil of the binary in the opposite direction to the
ejected star. We show that the relative position of the very massive binary
R145 and the runaway early B-type star Sk-69 206 on the sky is consistent with
the possibility that both objects were ejected from the central cluster, R136,
of the star-forming region 30 Doradus via the same dynamical event -- a
three-body encounter.Comment: 10 pages, 12 figures, accepted to MNRA
Le FORUM, Vol. 33 No. 4
https://digitalcommons.library.umaine.edu/francoamericain_forum/1023/thumbnail.jp
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