886 research outputs found
Method of radiographic inspection of wooden members
The invention is a method to be used for radiographic inspection of a wooden specimen for internal defects which includes the steps of introducing a radiopaque penetrant into any internal defects in the specimen through surface openings; passing a beam of radiation through a portion of the specimen to be inspected; and making a radiographic film image of the radiation passing through the specimen, with the radiopaque penetrant in the specimen absorbing the radiation passing through it, thereby enhancing the resulting image of the internal defects in the specimen
Indirect Food Web Interactions: Sea Otter Predation Linked to Invasion Success in a Marine Fouling Community
Humans have caused grave ecological and economic damage worldwide through the introduction of invasive species. Understanding the factors that influence community susceptibility to invasion are important for controlling further spread of invasive species. Predators have been found to provide biotic resistance to invasion in both terrestrial and marine systems. However, predators can also have the opposite effect, and facilitate invasion. Therefore, recovery or expansion of native predators could facilitate the spread of invasive species. Needles et al. (2015) demonstrated that the threatened southern sea otter (Enhydra lutris nereis) facilitated the invasion of an exotic bryozoan, Watersipora subatra. However, the underlying mechanism was not fully understood. We tested the hypothesis that sea otter predation on Romaleon antennarium crabs indirectly facilitated the abundance of W. subatra. To do this, we collected weekly data on sea otter foraging and quantified the abundance of crabs in the sea otter diet. We also conducted a caging experiment, where we experimentally manipulated crab densities and limited otter access using exclusion cages on pier pilings in Morro Bay, CA. We used photoQuad image processing software to calculate the abundance of W. subatra on PVC panels within each treatment group. We found that crabs were the second most abundant prey item in Morro Bay, comprising 25.1% of the otter diet. Through the caging experiment, we found that W. subatra abundance significantly increased as crab densities decreased. Our results indicated that sea otters indirectly facilitated the invasion of W. subatra by reducing R. antennarium crab densities and sizes. Removal of crabs may release W. subatra from the disturbance caused by crab foraging behavior. Understanding the impacts of top predators in invaded ecosystems has important management implications, as recovery of predator populations could unintentionally benefit some non-native species. Therefore, management should focus first on prevention and second on early detection and eradication of invasive species likely to benefit from predator recovery
Design, validation and dissemination of an undergraduate assessment tool using SimMan® in simulated medical emergencies
Background: Increasingly, medical students are being taught acute medicine using whole-body simulator manikins.
Aim: We aimed to design, validate and make widely available two simple assessment tools to be used with Laerdal SimMan (R) for final year students.
Methods: We designed two scenarios with criterion-based checklists focused on assessment and management of two medical emergencies. Members of faculty critiqued the assessments for face validity and checklists revised. We assessed three groups of different experience levels: Foundation Year 2 doctors, third and final year medical students. Differences between groups were analysed, and internal consistency and interrater reliability calculated. A generalisability analysis was conducted using scenario and rater as facets in design.
Results: A maximum of two items were removed from either checklist following the initial survey. Significantly different scores for three groups of experience for both scenarios were reported (p0.90). Internal consistency was poor (alpha<50.5). Generalizability study results suggest that four cases would provide reliable discrimination between final year students.
Conclusions: These assessments proved easy to administer and we have gone some way to demonstrating construct validity and reliability. We have made the material available on a simulator website to enable others to reproduce these assessments
Contracting Around the Hague Service Convention
When a plaintiff wishes to commence an action against a non-resident foreign defendant in an American forum, it may need to serve that defendant with process abroad. The Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters (“Hague Service Convention” or “Convention”) provides a mechanism for achieving that goal. Under the terms of this treaty — which has been ratified by 75 nations — each signatory is required to maintain a central authority that will serve process upon local defendants at the request of U.S. plaintiffs. In practice, however, the act of serving process upon defendants in particular foreign countries may present challenges. In Russia, for example, it is currently impossible for a U.S. plaintiff to serve process upon a defendant because that nation’s central authority refuses to accept requests from the United States. In China, the central authority sometimes takes more than a year to serve process on local defendants.
These complications raise the question of whether it is possible for private actors to contract around the Hague Service Convention so as to avoid the need to interact with central authorities in foreign nations. The California Supreme Court will soon take up this issue when it hears oral argument in Rockefeller Technology Investments (Asia) VII v. Changzhou SinoType Technology Company, Ltd. In this Essay, we first discuss how that particular case should be resolved. We explain that while it is possible to contract around the Convention, the language in the parties’ contract in SinoType failed to do so. We then discuss alternative drafting strategies that future parties might utilize in order to succeed where the parties in SinoType failed
Lower Limb Radiology of Distal Myopathy due to the S60F Myotilin Mutation
Distal myopathies are a clinically and genetically heterogenous group of disorders in which the distal limb musculature is selectively or disproportionately affected. Precisely defining specific categories is a challenge because of overlapping clinical phenotypes, making it difficult to decide which of the many known causative genes to screen in individual cases. In this study we define the distinguishing magnetic resonance imaging findings in myotilin myopathy by studying 8 genealogically unrelated cases due to the same point mutation in TTID. Proximally, the vastii, biceps femoris and semimembranosus were involved with sparing of gracilis and sartorius. Distally, soleus, gastrocnemius, tibialis anterior, extensor hallicus and extensor digitorum were involved. This pattern contrasts with other distal myopathies and provides further support for the role of imaging in the clinical investigation of muscle disease. Copyright (C) 2009 S. Karger AG, Base
The America Economic Crisis Of 2009/2010: Three Pillars Of American Strength That Will Lead To Recovery
The notion of the Fall of the American Empire (Wojtowicz, 1993) is equivalent to the Peter Principal in that positive realization will always prevail over the negative perspective. Wojtowicz (1993) contends that Isaac Asimov wrote his foundation stories to show that every empire, even the most powerful one, has to fall eventually. Lawrence Peter (1984), an educator and hierarchiologist, argued that each manager will rise to the level in which he or she will fail. Inevitably, the Peter Principal failed because it placed a negative connotation on managerial growth. The same thing holds true with the Failure of the American Empire. America cannot fail because while there are many foundations of strength that has held America together since the American Revolution, there are three pillars that will help America continue to prosper. The three pillars are the strength of the military, the excellent education system, and the spirit of democracy that has led to capitalism. The spirit of democracy as Abraham Lincoln exemplifies as “A government of people, by the people, for the people,” has kept America vibrant and open for people to rise to the highest office in the free world (Powell and Powell, 1918). In the philosophical Age of Enlightenment, John Locke, a puritan in the England of Cromwell, put forth a new civil order: law based on reason, a government deriving its power from the governed, liberty to pursue individual goals as a natural right, and private property and its use in the pursuit of happiness (Wren and Bedian, 2009). These four ideas provide the bases of how our founders designed the America of today. This paper provides an overview of the three pillars that will influence the economic recovery of America in a positive way
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