3,088 research outputs found
Letter to F.D. Moon from A. Mitchell Salone regarding information about and photos of the Colored School in Wewoka
No full textLetter to F.D. Moon regarding a book being written on African American schools. The author asks for photos of the school and shows appreciation for how he runs the school
On lunar collision orbits: New methodologies for Moon-to-Moon transfer design
No full textMany interplanetary missions massively leverage the lunar gravitational pull in the so-called low-energy regime to converge to their aim, saving consistent amount of fuel. Among these, two future Japanese spacecraft are expected to repeatedly encounter the Moon along their trajectories to either facilitate the escape from the Earth–Moon system or opportunely target a specific region in its neighbourhood. Although never actively employed for preliminary trajectory design, lunar collision orbits have shown a rich dynamical structure and an applicability for both medium- and low-energy regimes. These characteristics, together with their intrinsic nature of being close to trajectories experiencing lunar fly-by, have encouraged this research. In this work, lunar collision orbits are employed to delineate a method for obtaining ballistic transfers between two successive lunar encounters, briefly addressed as Moon-to-Moon. This study is first carried out with the assumptions of the autonomous Circular Restricted Three-Body Problem, subsequently extended to the nonautonomous Bi-circular Restricted Four-Body Problem, including the solar gravitational influence.Poincaré cuts are extensively used as a dimensionality reductant for lunar collision orbits: this allows to ascertain their similar behaviour with trajectories flybying the Moon, whose characteristics are partly foreseen by determining the associated intersection with the same cut. A patching is performed at the cut to obtain both single and multiple ballistic Moon-to-Moon transfers. The strict bond of lunar collision orbits with the invariant manifolds of simple periodic orbits about Lagrangian points is confirmed and exploited to design ballistic itineraries connecting highly elliptic orbits about the Earth to horizontal Lyapunov orbits of the Earth–Moon system, via a single Moon-to-Moon transfer. With the usage of the lunar collision orbits and the Poincaré cut, a simple optimization technique is implemented to retrieve a properly defined Moon-to-Moon transfer from a trajectory missing a second fly-by with the Moon. Including the presence of the Sun, a similar method for obtaining single and multiple Moon-to-Moon transfers is developed. A classification of lunar double-collision transfers is then performed within the same framework, highlighting their similarity with other studies in past literature, eventually leading to the construction of a database of Moon-to-Moon transfers. The latter, conceived as an improvement with respect to the former version by adding the lunar gravitational influence, shows its applicability in real preliminary trajectory design.Aerospace Engineerin
Moon Dog [Translation]
No full textA Japanese to English translation of the poem Moon Dog originally written by Mizuho Ishid
We Reach the Moon. Title page inscribed by the author.
No full textOn 20 July 1969, Neil Armstrong and Buzz Aldrin became the first humans to land on the moon. The achievement inspired a host of products and memorabilia. On display from the publishing collection of Seymour Lawrence is both the German and American editions of the children’s 1969 picture book Journey to the Moon by artist Erich Fuchs who depicts the eight-day voyage with cubist modernism. The author of We Reach the Moon was the New York Times science reporter, and he inscribed his paperback to Mississippi writer Willie Morris and family.https://egrove.olemiss.edu/space_exhibit_2020/1012/thumbnail.jp
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Impact origin of the Moon
No full textA few years after the Apollo flights to the Moon, it became clear that all of the existing theories on the origin of the Moon would not satisfy the growing body of constraints which appeared with the data gathered by the Apollo flights. About the same time, researchers began to realize that the inner (terrestrial) planets were not born quietly -- all had evidences of impacts on their surfaces. This fact reinforced the idea that the planets had formed by the accumulation of planetesimals. Since the Earth`s moon is unique among the terrestrial planets, a few researchers realized that perhaps the Moon originated in a singular event; an event that was quite probable, but not so probable that one would expect all the terrestrial planets to have a large moon. And thus was born the idea that a giant impact formed the Moon. Impacts would be common in the early solar system; perhaps a really large impact of two almost fully formed planets of disparate sizes would lead to material orbiting the proto-earth, a proto-moon. This idea remained to be tested. Using a relatively new, but robust, method of doing the hydrodynamics of the collision (Smoothed-Particle Hydrodynamics), the author and his colleagues (W. Benz, Univ. of Arizona, and A.G.W. Cameron, Harvard College Obs.) did a large number of collision simulations on a supercomputer. The author found two major scenarios which would result in the formation of the Moon. The first was direct formation; a moon-sized object is boosted into orbit by gravitational torques. The second is when the orbiting material forms a disk, which, with subsequent evolution can form the Moon. In either case the physical and chemical properties of the newly formed Moon would very neatly satisfy the physical and chemical constraints of the current Moon. Also, in both scenarios the surface of the Earth would be quite hot after the collision. This aspect remains to be explored
Reframing Assessment of Grantee Perceptions: Reconsidering Effectiveness With Broader International Stakeholder Engagement
No full text· Stakeholder engagement is important in philanthropy because it allows grantmakers and grantees to pool their respective resources more effectively to address their shared target issues.
· As more and more foundations and other grantmaking entities venture into the expansive world of self-evaluation, it is prudent that these methods be examined in light of international funding relationships.
· In order to better understand how these tools and methods can be used internationally, we outline the opportunities presented when using frames as one basis for decision-making in complex situations.
· Using the hypothetical case of a U.S. funder seeking to understand grantee perception in East Africa, we present a matrix of considerations and questions that allow grantmakers to account for the local reality of grantee perceptions.
· By actively engaging all stakeholders involved in the process, international grantmakers can begin to adapt these tools to meet their cross-cultural needs, while limiting bias and unexamined counterproductive assumptions
A Novel Micromechanical - Analogical Model for Low Temperature Creep Properties of Asphalt Binder and Mixture
No full textThe ENTPE transformation is commonly used to predict the low temperature properties of asphalt binders from the corresponding mixtures experimental data and vice-versa. Nevertheless, the transformation parameter, α, associated to the ENTPE equation, cannot be directly obtained without relying on both binder and mixture testing. This paper presents a comprehensive investigation to link the ENTPE transformation to the mixture microstructure. This is accomplished by three-point bending tests on asphalt binders and mixtures, digital image processing and statistical evaluation of mixture microstructure, together with a newly proposed micromechanical-analogical model, called MCF (Moon-Cannone Falchetto), used for deriving an explicit expression of α. The values of α obtained from asphalt binder and mixture laboratory measurement are compared to the values predicted by the new formulation. The results indicate that reasonable predictions of low temperature creep stiffness of asphalt binder can be obtained when the new expression of α is used in the ENTPE transformation.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Commentary: The Comanche Moon
No full textLast week we had a gorgeous full moon known as the Flower Moon, called that because it arrives when the wildflowers bloom across North America.
When I was young, I knew of only three special moons: the harvest moon, the blue moon and the Comanche Moon. Back in frontier times, it was the Comanche Moon that was the most deeply feared moon in Texas and northern Mexico.
The Mexicans had a saying, a dicho, about their sons: “He will be a fine man if the Comanches don’t take him.”
For the Comanches, the raids were about survival. They were a horse culture and needed horses for their way of life – for transport and for trade. They needed children to swell their ranks to compete against the intrusions of new cultures.
Iron Jacket, a Comanche war chief, said: “The moon is our sister. She lights the trail and tells us when to ride. Under her, we are faster than the wind.”
On the other side of this equation was fear of the Comanche Moon. J.W. Wilbarger, a minister of the time, said: “The Comanches would come with the moon. … Every man in the county sat up with his rifle across his knees when the silver lit the grass.” Wilbarger would know: He was scalped and left for dead but lived to tell the tale.
L. T. Hardeman, another minister, wrote in his journal in 1860: “On the night of the Comanche Moon, no fire was lit, no songs were sung. We slept with rifles and rosaries both.”
Folklore from the Texas Hill Country tells us that “Even the coyotes went quiet during the Comanche Moon. They knew it was not their time to howl.”
In S.C. Gwynne’s masterpiece, “Empire of the Summer Moon,” he tells of the 1,000-strong Comanche raid that traveled virtually unseen under a bright moon all the way to Linnville on the coast and burned it to the ground. There were efforts to rebuild, but the community died out. Most of the people moved to what is today Port Lavaca.
Though the Comanches were eventually weakened by the wholesale slaughter of the buffalo and the raids beneath the full moon stopped, the name Comanche Moon has remained.
The Comanches proved themselves in those times to be fierce and feared warriors who were doing all they could to defend their homeland from invaders.
The Texans and Tejanos who pushed at great personal cost into Comanche lands in turn developed a toughness and resolve that shaped successive generations. Author Larry McMurtry believed this was partially responsible for the Texas character.
He wrote: “The power of such experience will not sift out of the descendants” in just a few years. “Elements of that primal” struggle will assert itself through several generations to come.
I think of that every time I see the Comanche Moon rising
The moon, the creature, and the creator
No full textThroughout history the story of the werewolf has been iconic and represented by the full moon. When the phase of the moon is full, typically normal people grow fangs and hair similar to a dog. Thus the symbol of the full moon has been associated with insanity. In most stories the full moon means that people turn into monsters that roam around and instill terror in people. This symbol has been a part of society for a long time and can even be seen in older works, not just modern ones. Because of this association of being crazy the term lunatic was coined, meaning “affected with the kind of insanity that was supposed to have recurring periods dependent on the changes of the moon” (OED). In Frankenstein by Mary Shelley the moon is used to help make the creature into a monster. The creature’s violence increases whenever the moon is out, and this violence leads to Victor’s downfall. Whenever the creature does something evil the moon is described depicting the insanity that is slowly consuming Victor. There is the relationship of the moon, which affects the monster who then affects Victor, so the moon is indirectly causing Victor to be consumed by insanity. There is a close association of Victor and the moon because nature is showing the violence of something unnatural like the monster. The moon is showing Victor the unnatural horror of the creature he has created as his punishment for being the creator. The notorious symbol of the moon illustrating insanity is used throughout the novel to show how the creature is slowly making Victor insane and the moon is very much demotic in character because it reveals the creature to Victor. (Author abstract)Worth, E. (2014). The moon, the creature, and the creator. Retrieved from http://academicarchive.snhu.ed
Half Moon Lake School District No. 2785
No full textPhotograph - Students, likely at Half Moon Lake School, near Waugh, Alberta. Teacher is P. Kowalski. ATS 4-59-23-W
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