21 research outputs found
Seismic reservoir characterisation employing factual and simulated wells
No full textCivil Engineering and Geoscience
Oswiecim: Folding around the Pipes
No full textThe project of my graduation is situated in Oswiecim, Poland. Basically it started with a mapping of the heating system pipes network concentrated on use, perception and rhythm. This first research lead me to my design : a horse-riding infrastructure composed of 3 sequences : the hippodrome, the promenade, and the public facilities. The whole design is based on the folding method.Border ConditionsArchitectureArchitectur
Discrepancies between chained and classic utilities induced by anchoring with occasional adjustments.
No full textBACKGROUND: Classic utility assessment uses death and perfect health as end points. Chained utility assessment uses other health states as endpoints. It has been previously noted that these 2 assessment procedures lead to different utilities. PURPOSE: The author attempts to explain these discrepancies between chained and classic assessments. METHOD: Previous data are plotted in a uniform way to facilitate comparison. Using time trade-off and paired-comparison data, the author estimates the extent to which respondents adjust their responses when end points are varied. Data were obtained in various samples: in healthy volunteers from the general public, in students, and in women at high risk for breast cancer seeking genetic counseling. RESULTS: The author obtained 741 valid data records from a total of 106 participants. The data replicate the pattern found previously. When compared to classic utilities, (1) chained utilities are smaller (larger) when the best (worst) endpoint varies and (2) the discrepancies become smaller for utilities near 0 and 1. The data reveal that there is a distinct failure to adjust responses when the end points are varied, as if the responses anchor on some master health scale. The latter finding explains the robust pattern of discrepancies. CONCLUSION: Decision analyses that use a mix of classic and chained utilities are not on firm ground. One should be wary of normative interpretations of new value assessment procedures. Alternative interpretations of the findings are discussed
A computational method for oleo-acoustics, application to hydraulic shock absorbers
No full textTo predict high-frequency oil-flow phenomena in hydraulic-shock-absorber designs, a mathematical-physical model is proposed. The model consists of the 2-D unsteady Euler equations in axial-symmetric coordinates and an appropriate equation of state for oil. The main topic of the paper is the development of a numerical method for these equations. A new Osher-type flux-difference splitting scheme is derived for it. The mathematical-physical model and its numerical approximation are applied to a simplified part from a shock-absorber design. The method is promising as far as more realistic computations are concerned
Socio-demographic factors and the prevalence of metabolic syndrome among filipinos from the LIFECARE cohort
No full textJournal of Atherosclerosis and Thrombosis21SUPPL. 1S9-S1
A computational method for high-frequency oleodynamics, application to hydraulic-shock-absorber designs
No full textTo predict high-frequency oil-flow phenomena in hydraulic-shock-absorber designs, a mathematical-physical model is proposed. The model consists of the 2-D unsteady Euler equations in axial-symmetric coordinates and an appropriate equation of state for oil. The main topic of the paper
is the development of a numerical method for these equations. A new Osher-type flux-difference splitting scheme is derived for it. The mathematical-physical model and its numerical approximation are applied to a simplified part from a shock-absorber design. The method is promising as far as
more realistic computations are concerned
Comments on A shaped reflector antenna for 60-GHz indoor wireless LAN access points
No full textThe author comments that the shaped reflector antenna principles and theory of Smulders, Khusial and Herben (see ibid., vol.50, p.584-91, Mar.2001) are based on the papers described by Kumar (see Proc. Montech '86 IEEE Conference on Antennas and Communication, 1986, IEEE Cat. No. TH0156-0, Inst. Elect. Eng. Proc., vol.134, p.106-108, 1987 and Technology Symposium, 1990). These papers described the X-band, circularly polarized shaped beam telemetry antenna suitable for retransmitting the radar data back to an earth terminal. Smulders et al. have used the same principle, and similar types of radiation patterns are produced. However, two points are different in their paper: (1) the design frequency (60 GHz) and (2) the application of antenna for indoor wireless LAN access points. Therefore, they authors should have referenced Kumar's papers. Smulders et al. agree with Kumar's comments that reflector shaping is nothing new. However, we took into account diffraction effects (by applying the uniform theory of diffraction) whereas the shaping in the paper of Kumar is based on geometrical optics, only. We showed that according to our approach, a more smooth illumination function can be achieved and how the smoothing effect depends on the amount of edge illumination. We also showed in which way the spatial field deviation can be minimized and that this could save a few decibels in the link budget
Valuation structures of health states revealed with singular value decomposition.
No full textContains fulltext :
51148.pdf (Publisher’s version ) (Closed access)OBJECTIVE: A basic mathematical routine called singular value decomposition (SVD) is introduced and applied to explore the applicability of this methodology in the context of health state valuations. METHODS: SVD dissects a data matrix into 3 separatematrices that contain all the information present in the original data. Eachmatrix comprises a specific type of information. One matrix comprises arrays of weights that show the different valuation structures (i.e., similar ways among respondents to quantify specific sets of health states). A 2nd matrix with weights expresses how strongly each respondent's ratings are related to each of the valuation structures, and a 3rd matrix contains the percentages of variance associated with the valuation structures. SVD was applied to data from a group of 340 respondents who each gave a value to 16 health states using the time tradeoff (TTO) method and the visual analog scale (VAS). RESULTS: SVD of the VAS data showed 1 distinct response pattern that accounted for 91.6% of the total variance. The contribution of the 1st component in the TTO data wasmuch lower (57.4%), and a 2nd component (15.6%) could be identified that reflected a distinct preference structure opposed to the 1st and principal component. CONCLUSIONS: Application of SVD to the TTO data revealed that respondents fell into 2 different groups in their TTO evaluations, but respondents weremore similar to each other in their VAS responses. The author discusses other applications of SVD to clinical research
Risk analysis and management in the water utility sector - a review of drivers, tools and techniques
No full textThe provision of wholesome, affordable and safe drinking water that has the
trust of customers is the goal of the international water utility sector. Risk
management, in terms of protecting the public health from pathogenic and
chemical hazards has driven and continues to drive developments within the
sector. In common with much of industry, the water sector is formalizing and
making explicit approaches to risk management and decision-making that have
formerly been implicit. Here, we review the risk management frameworks and risk
analysis tools and techniques used within the water sector, considering their
application at the strategic, programme and operational levels of decision-
making. Our analysis extends the application beyond that of public health to
issues of financial risk management, reliability and risk-based maintenance and
the application of business risk maturity models
Symptoms in long-term breast cancer survivors:A cross-sectional study in primary care
No full textPurpose: Various long-term symptoms can manifest after breast cancer treatment, but we wanted to clarify whether these are more frequent among long-term breast cancer survivors than matched controls and if they are associated with certain diagnoses.Methods: This was a cross-sectional, population-based study of 350 breast cancer survivors treated with chemo- and/or radiotherapy >= 5 years (median 10) after diagnosis and 350 women without cancer matched by age and primary care physician. All women completed a questionnaire enquiring about symptoms, underwent echocardiography to assess the left ventricle ejection fraction, and completed the Hospital Anxiety and Depression Scale. Cardiovascular diseases were diagnosed from primary care records. In a multivariable logistic regression analysis, symptoms were adjusted for the long-term effects and compared between cohorts and within the survivor group.Results: Concentration difficulties, forgetfulness, dizziness, and nocturia were more frequent among breast cancer survivors compared with controls, but differences could not be explained by cardiac dysfunction, cardiovascular diseases, depression, or anxiety. Intermittent claudication and appetite loss were more frequent among breast cancer survivors than controls and associated with cardiac dysfunction, depression, and anxiety. Breast cancer survivors treated with chemotherapy with/without radiotherapy were at significantly higher odds of forgetfulness and nocturia, but significantly lower odds of dizziness, compared with breast cancer survivors treated with radiotherapy alone.Conclusions: Intermittent claudication and appetite loss are common among breast cancer survivors and are associated with cardiac dysfunction and mood disorders. Other symptoms varied by whether the patient underwent chemotherapy with/without radiotherapy (forgetfulness and nocturia) radiotherapy alone (dizziness). (C) 2020 The Author(s). Published by Elsevier Ltd.</p
