Synthesis of regional crust and upper-mantle structure from seismic and gravity data

Analyses of regional gravity and magnetic patterns, LANDSAT images and geological information revealed two major lineaments crossing western Pennsylvania and parts of surrounding states. These lineaments are inferred to be expressions of fracture zones which penetrare deeply into the crust and possibly the upper mantle. The extensions of the Tyron-Mt. Union and the Pittsburgh-Washington lineaments bound a distinct crustal block (Lake Erie-Maryland block) over 100 km wide and probably more than 600 km in length. Evidence exists for the lateral displacement of this block at least 60 km northwestward during late Precambrian to Lower Ordovician time. Subsequent movements have been mainly vertical with respect to neighboring blocks. A possible crustal block that passes through eastern Kentucky, proposed by a TVA study on tectonics in the southern Appalachians, was also investigated. Finally, the use of regional gravity and magnetic data in identifying major crustal structures beneath western Pennsylvania is discussed

Synthesis of regional crust and upper-mantle structure from seismic and gravity data

Available seismic and ground based gravity data are combined to infer the three dimensional crust and upper mantle structure in selected regions. This synthesis and interpretation proceeds from large-scale average models suitable for early comparison with high-altitude satellite potential field data to more detailed delineation of structural boundaries and other variations that may be significant in natural resource assessment. Seismic and ground based gravity data are the primary focal point, but other relevant information (e.g. magnetic field, heat flow, Landsat imagery, geodetic leveling, and natural resources maps) is used to constrain the structure inferred and to assist in defining structural domains and boundaries. The seismic data consists of regional refraction lines, limited reflection coverage, surface wave dispersion, teleseismic P and S wave delay times, anelastic absorption, and regional seismicity patterns. The gravity data base consists of available point gravity determinations for the areas considered

Weight outcomes audit for 34,271 adults referred to a primary care/commercial weight management partnership scheme

Copyright © 2011 S. Karger AG, Basel.Peer reviewedPublisher PD

DEVELOPMENT OF PROCESS SAFETY MANAGEMENT SYSTEM FOR WATER-NATURAL GAS SEPARATION SYSTEM

The purpose of this dissertation is to introduce and record the development of Process Safety Management System (PSMS) for the Water-Natural Gas Separation System ofUTP Baromia Project. The objective of the project is to develop the PSM system along the fourteen elements (6 Process Elements and 8 Database Elements) for CompressorV-470 and Water Tank V-450 with accordance to OSHA PSM Standard 1910.119. Problem pertaining to Process Safety Management Systems in the current practice of PSM implementation is it does not fully involve all of its fourteen elements and there are still no tools that can integrate all the PSM elements into one practical and effective system where all the information of the company is available to be maneuvered. There are basically many scope of work which ranges from creating Process Elements for equipments, improvising the PSM interface using Microsoft Visual Basic and completing the other Database Elements needed for the system to comply with the standards provided by the safety administration. The methodology of this project revolves around seeking information from literatures, developing the framework for each element, developing the interface for the system and fmally gathering data for the compressor V -470 and Water Tank V-450

The Plus-Minus Davenport Constant of Finite Abelian Groups

Let G be a finite abelian group, written additively. The Davenport constant, D(G), is the smallest positive number s such that any subset of the group G, with cardinality at least s, contains a non-trivial zero-subsum. We focus on a variation of the Davenport constant where we allow addition and subtraction in the non-trivial zero-subsum. This constant is called the plus-minus Davenport constant, D±(G). In the early 2000’s, Marchan, Ordaz, and Schmid proved that if the cardinality of G is less than or equal to 100, then the D±(G) is the floor of log2 n + 1, the basic upper bound, with few exceptions. The value of D±(G) is primarily known when the rank of G at most two and the cardinality of G is less than or equal to 100. In most cases, when D±(G) is known, D±(G)= floor(log2 |G|) + 1, with the exceptions of when G is a 3-group or a 5-group. We have studied a class of groups where the cardinality of G is a product of two prime powers. We look more closely to when the primes are 2 and 3, since the plus-minus Davenport constant of a 2-group attains the basic upper bound and while the plus-minus Davenport constant of a 3-group does not. To help us compute D±(G), we define the even plus-minus Davenport constant, De±(G), that guarantees a pm zero-subsum of even length. Let Cn be a cyclic group of order n. Then D(Cn) = n and D±(Cn) =floor( log2 n)+1. We have shown that De±(Cn) depends on whether n is even or odd. When n is even and not a power of 2, then De±(Cn) = floor(log2 n) + 2. When n = 2k , then De±(Cn) = floor(log2 n) + 1. The case when n is odd, De±(Cn) varies depending on how close n is to a power of 2. We have also shown that a subset containing the Jacobsthal numbers provides a subset of Cn that does not contain an even pm zero-subsum for certain values of n. When G is a finite abelian group, we provide bounds for De±(G). If D±(G) is known, then we given an improvement to the lower bound of De±(G). Additional improvements are shown when G is a direct sum an elementary abelian p-groups where p is prime. Then we compute the values of De±(Cr3 ) when 2 ≤ r ≤ 9 and provide an optimal lower bound for larger r. For the group C2 ⊕ Cr3 , D±(C2 ⊕ Cr3 ) = De±(Cr3 ). When r \u3c 10, D±(C2 ⊕ Cr3 ) does not attain the basic upper bound. We conjecture that as r increases, D±(C2 ⊕ Cr3 ) will not attain the basic upper bound. Now, let G = Cq2 ⊕ Cr3 . We compute the values of D±(G) for general q and small r. In this case, we show that if D±(G) attains the basic upper bound then so does De±(G). We then look at the case when the cardinality of G is a product of two prime powers and show improvements on the lower bound by using the fractional part of log2 p of each prime. Furthermore, we compute the values of D±(G) when 100 \u3c |G| ≤ 200, with some exceptions

Choosing treatment for localised prostate cancer: A patient-conducted-interview study

Objectives: Treatment choice can be particularly difficult in localised prostate cancer because of the uncertainty involved. Indeed, some men prefer maintaining their masculine identity and quality of life to potentially securing longer-term survival through surgery or radiotherapy. UK health services are now obliged to leave the choice of treatment to the patient and the aim of this study is to improve understanding of patients’ experiences of choosing treatment. Methods: A one-day participative workshop where men of six months post-diagnosis design and conduct audio and video interviews on each other about their experiences of choosing treatment. Results: The findings show that treatment choice is a complex process combining emotional and rational elements. Information gathering and delegation to professional expertise were two key themes that emerged. Conclusions: The findings emphasise that treatment choice for localised prostate cancer is little like the traditional notions of consumerism from which it is derived. Importantly, the results illustrate, from a patient perspective, how health professionals can engage in their roles as information providers and as experts

Energy Efficient Engine acoustic supporting technology report

The acoustic development of the Energy Efficient Engine combined testing and analysis using scale model rigs and an integrated Core/Low Spool demonstration engine. The scale model tests show that a cut-on blade/vane ratio fan with a large spacing (S/C = 2.3) is as quiet as a cut-off blade/vane ratio with a tighter spacing (S/C = 1.27). Scale model mixer tests show that separate flow nozzles are the noisiest, conic nozzles the quietest, with forced mixers in between. Based on projections of ICLS data the Energy Efficient Engine (E3) has FAR 36 margins of 3.7 EPNdB at approach, 4.5 EPNdB at full power takeoff, and 7.2 EPNdB at sideline conditions

Good functional recovery following intervention for delayed suprachoroidal haemorrhage post bleb needling: a case report

<p>Abstract</p> <p>Introduction</p> <p>Bleb needling is a recognised procedure in the management of patients with failing trabeculectomies. Suprachoroidal haemorrhage can occur as an unusual complication. We report a pseudophakic man who had early surgical intervention for this complication. This intervention may have contributed to the good recovery of his visual acuity and the minimum changes to his visual fields.</p> <p>Case presentation</p> <p>A 79-year-old pseudophakic man with chronic open angle glaucoma presented with further deterioration of his right visual field despite maximum medical therapy and a previous trabeculectomy. The right visual acuity was 6/9 with an intraocular pressure (IOP) of 16 mmHg. Bleb needling with 5-fluouracil was performed in a standard manner. His postoperative IOP was 6 mmHg. Thirty-six hours later the visual acuity was reduced to hand movements and two large choroidal detachments where observed clinically, which progressed to suprachoroidal haemorrhages. Five days after the initial needling, the patient had complex surgery involving anterior chamber reformation, a bleb compression suture and drainage of the haemorrhagic suprachoroidal detachments. Subsequently, the patient had a right vitrectomy with endolaser following a vitreous haemorrhage. The final visual acuity was 6/9 with an intraocular pressure of 8 mmHg on travoprost and brinzolamide. The final visual field showed little change when compared with the pre-suprachoroidal haemorrhage visual field.</p> <p>Conclusion</p> <p>It is important to consider the possibility of delayed suprachoroidal haemorrhage as a complication in bleb needling, and early surgical intervention may be beneficial.</p