2,243 research outputs found
O(1) Steiner Point Removal in Series-Parallel Graphs
No full textWe study how to vertex-sparsify a graph while preserving both the graph’s metric and structure. Specifically, we study the Steiner point removal (SPR) problem where we are given a weighted graph G = (V,E,w) and terminal set V' ⊆ V and must compute a weighted minor G' = (V',E', w') of G which approximates G’s metric on V'. A major open question in the area of metric embeddings is the existence of O(1) multiplicative distortion SPR solutions for every (non-trivial) minor-closed family of graphs. To this end prior work has studied SPR on trees, cactus and outerplanar graphs and showed that in these graphs such a minor exists with O(1) distortion.
We give O(1) distortion SPR solutions for series-parallel graphs, extending the frontier of this line of work. The main engine of our approach is a new metric decomposition for series-parallel graphs which we call a hammock decomposition. Roughly, a hammock decomposition is a forest-like structure that preserves certain critical parts of the metric induced by a series-parallel graph
Affect, Albert Ellis, and Rational-Emotive Therapy
No full textThe theme is advanced that affect is an integral component of the Rational-Emotive Therapy model. The affective aspect of the model is reviewed in terms of theoretical constructs and therapeutic techniques. Several references to author-observed interactions of Albert Ellis are made and the life-style of Albert Ellis is described to permit inferences regarding the role of affect.Le thème mis en avant dans cette étude est que le domaine affectif est une partie composante du modèle de la Thérapie Rationnelle-Emotive. L\u27auteur examine l\u27aspect affect if du modèle en ce qui concerne les concepts théoriques et les techniques thérapeutiques. Plusieurs références aux interactions d\u27Albert Ellis observées par l\u27auteur sont faites et la manière de vivre d\u27Albert Ellis est décrite afin de permettre des inferences concernant le rôle de l\u27affection
FIGURE 246 in Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591
No full textFIGURE 246. Lasioglossum zophops (Ellis). Male (A) lateral habitus; (B) dorsal habitus; (C) face; (D) ventral view of genital capsule; (E) dorsal view of genital capsule; (F) apical view of genital capsule (G) S7, S8. Scale bars, A–C = 1 mm, G = 0.5 mm.Published as part of <i>Gibbs, Jason, 2010, Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591, pp. 1-382 in Zootaxa 2591 (1)</i> on page 371, DOI: 10.11646/zootaxa.2591.1.1, <a href="http://zenodo.org/record/10094479">http://zenodo.org/record/10094479</a>
FIGURE 176 in Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591
No full textFIGURE 176. Lasioglossum perpunctatum (Ellis). Male (A) lateral habitus; (B) dorsal habitus; (C) face; (D) ventral view of genital capsule; (E) dorsal view of genital capsule; (F) S7, S8; (G) oblique view of gonostylus, retrorse lobe. Scale bars, A–C = 1 mm, G = 0.5 mm.Published as part of <i>Gibbs, Jason, 2010, Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591, pp. 1-382 in Zootaxa 2591 (1)</i> on page 247, DOI: 10.11646/zootaxa.2591.1.1, <a href="http://zenodo.org/record/10094479">http://zenodo.org/record/10094479</a>
Ellis Island today: Located in the Upper Bay west of Jersey City and southwest of Manhattan
No full textEllis Island is a significant historical site just up the bay from tiny Liberty Island in Upper New York Bay. Why? Because it was here that millions of immigrants first put foot in America. But where is Ellis Island? Until recently, a coastal boundary dispute between New York and New Jersey made the answer to that question uncertain. The island was originally only 3 or so acres but because of the filling of tidal waters around the island to create room to house and process the immigrants, the island grew to over 27 acres. New Jersey claimed jurisdiction to all those areas filled but New York insisted the entire island, no matter what its size, was hers based on a compact signed by the two states in 1834. In 1980 the State of New Jersey Department of Environmental Protection (NJDEP), as part of the statewide effort to delineate tidelands delineated a claim line that essentially claimed the entire filled portion of Ellis Island, except the original three acres. (In New Jersey, all lands flowed by the tide now or formerly are owned by the state). New York objected. The states continued to squabble. Finally, in 1993, the State of New Jersey invoked the Supreme Courts jurisdiction to try the dispute. Coastal boundaries have historically been mapped on linen, and more recently mylar, but in this case the NJDEP invoked the modern technology of GIS to assist the state?s attorney general in preparing the case. Historic maps were scanned and registered to modern ortho-photography to assist in determining where and when areas were filled. GPS points were gathered and surveys made. All the digital data was then analyzed on the GIS to show where and how much fill was placed in the area. New Jersey used these data to argue that those areas filled after the compact were indeed still under the jurisdiction of New Jersey (Ellis Island is a National Park and therefore ownership was not the issue). A special master determined, and on May 26th 1998 the Supreme Court agreed, that New Jersey had sovereign authority over the filled land added to the original island. New York retained authority to the original 3-acre island. GIS was then used to implement the Supreme Court?s decision. NJDEP GIS scientists delineated the line between states using historical digital maps and adjusted the boundary line between states to the satisfaction of all parties. This paper will detail this historic decision and the implementation of the decision and the critical role GIS played.This is an updated version of the presentation entitled: GIS and Coastal Boundary Disputes: Where is Ellis Island? In this updated version, the author has added slides in order to better explain how the angles in the Fort Gibson wall, that was constructed just prior to the War of 1812, were used to align the 1857 survey of Ellis Island with current island.There is a companion paper to the 1999 version of this presentation. See: Professional Surveyor, July August 1999, Vol. 19, Number 6, pp 8-14.Purpose: Describes the delineation of the jurisdictional boundary between New Jersey and New York, on Ellis Island, as per the Supreme Court ruling of 1998. See: New Jersey v. New York, 523 U.S. 767 (1998)
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Session G: Nuclear Power/Climate Change – TerraPower’s Traveling Wave Reactor
No full textTyler Ellis is a project manager for TerraPower, where he works on developing and deploying new nuclear generating capacity to meet current and future energy needs. Before working at TerraPower, Ellis worked as a reactor supervisor at the Massachusetts Institute of Technology (MIT) Nuclear Reactor Laboratory and as a nuclear engineer for the MIT Center for Advanced Nuclear Energy Systems.
In 2007, Ellis worked with other MIT thought leaders to help shape the overall plan for the highly successful Bernard M. Gordon MIT Engineering Leadership Program. He composed plant design requirements for a high-temperature gas-cooled reactor with AREVA in France; conducted neutronic trade studies for three different nuclear electric propulsion systems at the Los Alamos National Laboratory; and explored economic, social and technical complexities in meeting the sustainability challenge in Switzerland.
Ellis earned both bachelors and master’s degrees in 2006 from the Massachusetts Institute of Technology in the field of nuclear science and engineering. In 2008, he earned his doctorate from MIT in the same field specializing in reactor physics. In addition, Ellis won several Best Technical Session awards for reactor physics at the American Nuclear Society student conferences. He was recognized by Scientific American as a Distinguished Scholar, received the American Nuclear Society John R. Lamarsh Memorial Award and was officially commended by the governor of California. In addition to having received several other awards, he is author/co-author of more than 15 publications and technical reports.TerraPower is moving forward with detailed plans for a sustainable, economic, and safe nuclear reactor. The Travelling Wave Reactor (TWR) – a reactor in the 500-megawatt electric range – uses unique core physics to initiate a breed and burn wave which can be completely sustained in fertile material. This process allows the TWR to convert depleted uranium waste into usable fuel as the reactor operates, providing a sustainable base-load power source. TerraPower is the first company to create a practical engineering embodiment of this previously studied concept thanks to a powerful advanced reactor modeling interface, developed in-house, which enables the analysis of traveling wave reactor technology in a way that has not been possible before. This presentation will provide more detail about the origins of the TWR, the project’s current status as well as some of the safety differences between TWRs and currently operating light water reactors
Lasioglossum (Dialictus) perpunctatum
No full textLasioglossum (Dialictus) perpunctatum (Ellis 1913) County records: Allegan, Arenac, Barry, Benzie, Berrien, Calhoun, Cheboygan, Chippewa, Clare, Clinton, Dickinson, Eaton, Gratiot, Hillsdale, Huron, Ingham, Ionia, Jackson, Kalamazoo, Kalkaska, Lake, Lapeer, Leelanau, Livingston, Manistee, Mecosta, Midland, Montcalm, Montmorency, Oakland, Osceola, Ottawa, Roscommon, Shiawassee, St. Joseph, Tuscola, Van Buren, Wexford.Published as part of Gibbs, Jason, Ascher, John S., Rightmyer, Molly G. & Isaacs, Rufus, 2017, The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history, pp. 1-160 in Zootaxa 4352 (1) on page 84, DOI: 10.11646/zootaxa.4352.1.1, http://zenodo.org/record/106385
The mainstream primary classroom as a language-learning environment for children with severe and persistent language impairment - implications of recent language intervention research
No full textMany UK children with severe and persistent language impairment (SLI) attend local mainstream schools. Although this should provide an excellent language-learning environment, opportunities may be limited by difficulties in sustaining time-consuming, child-specific learning activities; restricted co-professional working, and the complex classroom environment. Two language intervention studies in mainstream Scottish primary schools showed children with SLI receiving intervention from speech and language therapists (SLTs) or their assistants made more progress in expressive language than similar children receiving intervention from education staff. Potential reasons for this difference are sought in the amount of tailored language-learning activity undertaken; how actively school staff initiated contact with SLTs; and the language demands of the classroom. Tailored language learning appears to be a differentiating factor. A language support model, reflecting views of teachers and SLTs about encouraging language development for children with SLI within the ecology of the mainstream primary classroom, is also outlined
Economic Impact of the Petroleum Industry on Ellis County, Kansas
No full textThis work is aimed at presenting to the reader ideas regarding the importance of the petroleum industry to Ellis County. While the findings and conclusions put forth may not give adequate answers to all questions relating to the various phases of the industry, they should give some explanation regarding the role that the industry plays in the economic development of the county. The introductory chapter gives the purposes for undertaking this work and describes the physical and economic characteristics of Ellis County. It also gives a brief description of the mining industry in the county. Chapter two is devoted to presenting a review of the history of the development of the oil industry in the county. In Chapter three, the emphasis is placed on explaining the method of input-output analysis. This method was utilized by the author in order to show the impact of the oil industry on the economy of Ellis County. The concluding chapter shows the impact on Ellis County of the decrease of oil production in a five-year period. In finishing this thesis the author reached the following conclusions: 1) The impact on the economy of Ellis County attributable to the decrease in the value of oil production of 3,202,500. B) The direct and indirect effects of the decrease in the value of oil production led to a 13,462,500. The total income to households decreased by 102. 2) In a region that is regarded as primarily agricultural, the petroleum production rather than the agricultural production has been the major source of income for Ellis County. But the reserves of oil are not inexhaustible; in fact, the production of oil in the county has been declining since the mid- 1950\u27s. Consequently, the income derived from this production has been declining. Thus, in order for the economy of the county to remain healthy and keep up with the national growth in the standard of living (per capita income,) it is very important that Ellis County undertakes constant planning in order to start or attract industries that will be able to more than fill the gap left by the decline in the oil industry
Molecular structure of 3-aminopropyltriethoxysilane layers formed on silanol-terminated silicon surfaces
No full textThe use of the coupling agent, 3-aminopropyltriethoxysilane (APTES), in the silanization reaction with silanol-terminated silicon is an important surface modification reaction. Of particular importance is that the terminal amine functionalities of APTES are sufficiently exposed to the gas or liquid phase for further modifications, such as amide coupling reactions. Here, metastable induced electron spectroscopy (MIES) and UV photoelectron spectroscopy (UPS) were used to study the composition of the outermost layer of a silanol-terminated Si surface after silanization with APTES. High-resolution X-ray photoelectron spectroscopy (XPS) was used to validate the attachment of APTES to the surface. Density of States (DOS) calculations were employed for interpreting the MIE spectra. Findings showed that amine functionalities covered only a small fraction of the APTES-modified Si surface. © 2012 American Chemical Society.Robert G. Acres, Amanda V. Ellis, Jason Alvino, Claire E. Lenahan, Dmitriy A. Khodakov, Gregory F. Metha, and Gunther G. Andersso
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