1,280 research outputs found
Letter from Henry Atkinson to George Sibley, March 8, 1825
Transcript of Letter from Henry Atkinson to George Sibley, March 8, 1825. Atkinson discusses squatters moving onto Native American lands; asks Sibley to tell them they need to move or they will be removed by the Army
Securing peace: Henry M. Jackson and U.S.-Soviet relations
Title from PDF of title page (University of Missouri--Columbia, viewed on May 29, 2013).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Thesis advisor: Dr. Robert CollinsIncludes bibliographical references.M.A. University of Missouri--Columbia 2012.Dissertations, Academic -- University of Missouri--Columbia -- History."May 2012"This work focuses on the efforts of Senator Henry M. “Scoop” Jackson to stop U.S-Soviet détente. Arms control, human rights, and national security policy are discussed in this work Détente, or relaxation of tensions between the Soviet Union and the United States, aimed to link reductions in Soviet military action with progress in the area of arms control and cultural exchanges. Jackson opposed U.S-Soviet détente because he thought that it would embolden the Soviets militarily and allow the U.S.S.R to gain an advantage in the nuclear arms race. Jackson was also concerned with human rights and the character of the Soviet regime. He worked to change Soviet behavior in this area as well. He worked to publicize the cases of Soviet and Eastern European dissidents who struggled for political and religious freedom behind the Iron Curtain. This was in contrast to the Nixon and Ford administrations, who deemphasized human rights in pursuing détente. This study explores the interconnection between these issues and Jackson's struggle to strengthen American defenses against Soviet expansionism
Letter from Henry Atkinson to George Sibley, September 2, 1819
Transcription of Letter from Henry Atkinson to George Sibley, September 2, 1819. Atkinson discusses the shipment of cargo; Major Biddle being robbed by people from the Pawnee tribe
A safe method for the retrieval of a dislocated trial head in total hip arthroplasty
Total hip arthroplasty is a life changing procedure providing a significant improvement in the quality of life for those receiving treatment. An 81-year-old male with severe right sided hip osteoarthritis underwent uncemented total hiparthroplasty. Intraoperatively the 32mm trial head dislodged from the trial stem over the anterior rim of the acetabulum relocating to within the pelvic cavity. Time efficient retrieval was performed during primary surgery through a mini-incision at the iliac crest
Granuloma debridement and the use of an injectable calcium phosphate bone cement in the treatment of osteolysis in an uncemented total knee replacement
Polyethylene particulate debris-induced periprosthetic osteolysis is a known complication of knee arthroplasty surgery, and may result in the need for revision surgery. The management of these bony defects can be surgically challenging, and full revisions of well-fixed total knee components can lead to substantial bone loss. We present the case of a 71 year old man who developed knee pain and osteolysis around an uncemented total knee replacement. Due to significant medical comorbidies he was treated by percutaneous cyst granuloma debridement and grafting using an injectable calcium phosphate bone substitute. There were no wound complications, and the patient was allowed to fully weight-bear post-operatively. Histopathology and microbiology of the cyst material confirmed polyethylene granulomata without any evidence of infection. At 6 weeks post-operatively the patient's previous knee pain had resolved, he was able to comfortably fully weight-bear. Preoperative scores (Knee Society Score (KSS) 41, WOMAC score 46.2, and Oxford Knee Score 39) had all improved at the 12-month post-operative review KSS 76, WOMAC 81.7 and Oxford Knee score 21). This is a safe and effective technique with minimal morbidity and may be an appropriate treatment modality when more extensive revision surgery is not possible. The case is discussed with reference to the literature
Meniscal Regeneration: A Cause of Persisting Pain following Total Knee Arthroplasty
Many patients have persisting knee pain following total knee arthroplasty. We report the unusual case of a patient whose chronic lateral and medial knee pain were caused by entrapped regenerated meniscal tissue. This was diagnosed and successfully treated by arthroscopic debridement
Reference to index of the botanical papers of Henry Brune Atkinson (1874-1960)
Archdeacon Henry Brune Atkinson (1874-1960), clergyman and orchidologist, was the son of Rev. Henry D. Atkinson of Stanley and Sarah Ann (Ward). He was educated at Stanley State School, Launceston Church Grammar School and the University of Tasmania (BA 1899). He was ordained an Anglican priest in 1902 and served as Rector of Holy Trinity Church, Hobart and Archdeacon of Launceston and Darwin. From 1919 to 1925 he was Vice-Warden of the University Senate. He collected many specimens of orchid from Tasmania and some from NSW, Victoria and New Zealand. These were given to the Queen Victoria Museum, Launceston by his daughter. Rev. Atkinson married Helen Bertha Knight of Christ Church, New Zealand, in 1905 and they had one daughter, Sheila.
These papers consist of his notes and sketches of orchids and letters, notes and articles received from other orchidologists: James Hamlyn Willis (1910-), Government Botanist Melbourne Botanic Gardens and editor of Victorian Naturalist, William Henry Nicholls (1885-1951) orchidologist of Victoria whose Orchids of Australia was published posthumously, and Rev. Herman Montague Rucher Rupp (1872-1956) clergyman and botanist of NSW. The papers were received in folders in a portfolio
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Non-Reacting Spray Characteristics of Gasoline and Diesel With a Heavy-Duty Single-Hole Injector
Gasoline compression ignition (GCI) is a promising combustion technology that could help alleviate the projected demand for diesel in commercial transport while providing a pathway to achieve upcoming CO2 and criteria pollutant regulations for heavy-duty engines. However, relatively high (i.e., diesel-like) injection pressures are needed to enable GCI across the entire load range while maintaining soot emissions benefits and managing heat release rates. There have only been a limited number of previous studies investigating the spray characteristics of light distillates with high-pressure direct-injection hardware under charge gas conditions relevant to heavy-duty applications. The current work aims to address this issue while providing experimental data needed for calibrating spray models used in simulation-led design activities. The non-reacting spray characteristics of two gasoline-like fuels relevant to GCI were studied and compared to ultra-low-sulfur diesel (ULSD). These fuels shared similar physical properties and were thus differentiated based on their research octane number (RON). Although RON60 and RON92 had different reactivities, it was hypothesized that they would exhibit similar non-reacting spray characteristics due to their physical similarities. Experiments were conducted in an optically accessible, constant volume combustion chamber using a single-hole injector representing high-pressure, common-rail fuel systems. Shadowgraph and Mie-scattering techniques were employed to measure the spray dispersion angles and penetration lengths under both non-vaporizing and vaporizing conditions. Gasoline-like fuels exhibited similar or larger non-vaporizing dispersion angle compared to ULSD. All fuels followed a typical correlation based on air-to-fuel density ratio indicating that liquid density is the main governing fuel parameter. Injection pressure had a negligible effect on the dispersion angle. Gasoline-like fuels had slower non-vaporizing penetration rates compared to ULSD, primarily due to their larger dispersion angles. As evidenced by the collapse of data onto a non-dimensional penetration correlation over a wide range of test conditions, all fuels conformed to the expected physical theory governing non-vaporizing sprays. There was no significant trend in the vaporizing dispersion angle with respect to fuel type which remained relatively constant across the entire charge gas temperature range of 800–1200 K. There was also no discernable difference in vapor penetration among the fuels or across charge temperature. The liquid length of gasoline-like fuels was much shorter than ULSD and exhibited no dependence on charge temperature at a given charge gas pressure. This behavior was attributed to gasoline being limited by interphase transport as opposed to mixing or air entrainment rates during its evaporation process. RON92 had a larger non-vaporizing dispersion angle but similar penetration compared to RON60. Although this seems to violate the original similarity hypothesis for these fuels, the analysis was made difficult due to the use of different injector builds for the experiments. However, RON92 did show a slightly larger vapor dispersion angle than RON60 and ULSD. This observation was attributed to nuanced volatility differences between the gasoline-like fuels and indicates that vapor dispersion angle likely relies on a more complex correlation beyond that of only air-to-fuel density ratio. Finally, RON92 showed the same quantitative liquid length and insensitivity to charge gas temperature as RON60
New country and state records, and other notes for Mexican Buprestidae (Coleoptera)
Treatment is provided for 224 species and subspecies in the genera Acherusia, Acmaeodera, Actenodes, Agaeocera, Agrilus, Anthaxia, Brachys, Buprestis, Chalcangium, Chrysobothris, Colobogaster, Cyphothorax, Dicerca, Dismorpha, Euchroma, Hiperantha, Hylaeogena, Leiopleura, Lius, Mixochlorus, Omochyseus, Pachyschelus, Polycesta, Psiloptera, Spectralia, Taphrocerus, Tetragonoschema, Thrincopyge, Trypantius and Tyndaris. Of these, 44 are recorded for the first time from Mexico and 175 represent new state records. Adult host and/or habitat information is provided, usually from the label data, for 93 of the taxa. Larval host records are indicated for Chrysobothris analis LeConte, C. capitata Gory and Laporte, C. multistigmosa (Mannerheim) and C. sallei Waterhouse. Acmaeodera sinaloensis Duges has been discovered to breed in bamboo. A major taxonomic character of C. multistigmosa is discussed
Engaging Northern Indigenous Communities in Biophysical Research: Pitfalls and Successful Approaches
Guidelines and best practices to engage Indigenous people in Arctic regions in biophysical research have emerged since the 1990s. Despite these guidelines, mainstream scientists still struggle to create effective working relationships with Indigenous people and engage them in their research. We encountered this issue when we visited three communities on Alaska’s west coast to study impactful weather events and the formation of “slush ice berms,” which can protect towns from storm surges. As we worked to build relationships with residents of the towns, we found the existing guidelines are often helpful for telling us what to do—for example, they emphasize the importance of face-to-face communication—but researchers also need to think about how to do it (skills) and how to be (personal attributes). To demonstrate to Indigenous people that we value and respect their culture, researchers could learn to use language that is understandable and that reflects a collaborative rather than a top-down approach. We should be ready to adjust our schedules and to help the community we are visiting, rather than simply focusing on our own needs. We might look for benefits for the community and ensure residents understand and are satisfied with the research we are doing. Some of the necessary attributes we identified are curiosity, honesty, interpersonal awareness, empathy, flexibility, and openness. Although the skills and attributes presented here are useful to bridge the gap between cultures, we caution that there is no specific formula that can guarantee success.Des lignes directrices et des pratiques exemplaires visant à faire participer les peuples autochtones des régions arctiques à la recherche biophysique sont publiées depuis les années 1990. Malgré ces lignes directrices, les scientifiques généraux ont toujours de la difficulté à créer des relations de travail efficaces avec les peuples autochtones et à les faire participer à leurs recherches. Nous avons fait face à cet enjeu quand nous avons visité trois collectivités de la côte ouest de l’Alaska pour étudier les événements climatiques percutants et la formation de « bermes de bouillie de glace » susceptibles de protéger les localités des ondes de tempête. Quand nous avons essayé de nouer des liens avec les résidents des diverses localités, nous avons constaté que les lignes directrices actuelles sont souvent utiles pour nous indiquer quoi faire (par exemple, elles mettent l’accent sur l’importance des communications face à face), mais les chercheurs doivent aussi penser à comment le faire (les compétences) et à comment se présenter (attributs personnels). Pour prouver aux Autochtones qu’ils valorisent et respectent leur culture, les chercheurs pourraient apprendre à employer du vocabulaire qui est compréhensible et qui tient compte d’une démarche de collaboration au lieu d’une démarche hiérarchique du sommet à la base. Il faudrait que nous soyons prêts à adapter nos emplois du temps et à aider la collectivité que nous visitons au lieu de nous concentrer seulement sur nos propres besoins. Il faudrait aussi considérer les avantages pour la collectivité et nous assurer que les résidents comprennent la recherche que nous faisons et soient satisfaits. Parmi les attributs nécessaires pour ces travaux de recherche, notons la curiosité, l’honnêteté, la sensibilisation aux besoins d’autrui, l’empathie, la flexibilité et l’ouverture d’esprit. Même si les compétences et les attributs dont il est question ici aident à combler l’écart entre les cultures, nous tenons à souligner qu’aucune formule particulière ne garantit le succès
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