69 research outputs found
Localization of cosmic gamma-ray bursts in interplanetary space with MGNS/BepiColombo and HEND/Mars Odyssey experiments
No full textThis paper describes the methods and results for the localization by triangulation of cosmic gamma-ray bursts (GRBs) independently observed by two space experiments: the Mercury Gamma-ray and Neutron Spectrometer (MGNS) and the High Energy Neutron Detector (HEND). MGNS is onboard the MPO/BepiColombo mission and on a stage of cruise to Mercury whereas HEND is onboard Mars Odyssey mission and in orbit around Mars. An analysis is performed of the accuracy of localization of the GRBs jointly observed by the two instruments at interplanetary distances by comparing their light curves. Notable achievements and scientific opportunities are described also in light of the recent inclusion of MGNS within the program of interplanetary network for gamma-ray burst localization (IPN).Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.RST/Luminescence Material
Pedestrianization through Tactic
No full textMany ancient cities around the world were known with their livability (Rodriguez, G.R., Brebbia, C.A. & Almorza, D., 2017). However, these cities started to lose this feature, when vehicles became prior to pedestrians who lost their sense of place (Nady, 2015), as many negative impacts came along. In return, people escaped the city’s core searching for lively districts with attractive streets where the human basic activities can be performed. As a result, dead city centers were left behind (Ibrahim, 2016). The present paper work proposes an integrative literature between the pedestrianization and livability, then introduce a creative implementation approach to pedestrianization in order to achieve the following objectives: 1- a tool to break the various barriers that may face implementation, 2-a method of exploration regarding the potential of the misused asphalt, 3- a tactic to re-attract people to the city’s core and its walkable environment and finally, 4- restore the city’s livability thus its urban sustainable development.
From this perspective, by rejuvenating the core of a city, the entire city’s livability could be restored, causing an urban sustainable development, through the creative tactical urbanism. Also, the research includes an analysis of international examples, based on the criterion of tactical urbanism practices
Effect of Different Bonding Conditions on the Shear Bond Strength of Two Compomers to Bovine Dentin
No full textDespite the improvements to compomer materials, the bond strength of these materials remains inferior
to "composite/resin bonding" systems and limits their clinical use. The purpose of this study was to evaluate the
effect of acidic conditioning with phosphoric acid and Prompt L-Pop (PLP) on the shear bond strength of two
compomers Dyract AP (DAP) and Composan Glass (CG) to dentin.Corresponding Author:
Dr. Hend Al-Nahedh
Assistant Professor and Consultant,
Department of Restorative Dental Sciences, College of Dentistry, King Saud University Riyadh, Saudi Arabi
Risks of second primary cancers among 584,965 female and male breast cancer survivors in England: a 25-year retrospective cohort study
No full textBackground: second primary cancers (SPCs) after breast cancer (BC) present an increasing public health burden, with little existing research on socio-demographic, tumour, and treatment effects. We addressed this in the largest BC survivor cohort to date, using a novel linkage of National Disease Registration Service datasets. Methods: the cohort included 581,403 female and 3562 male BC survivors diagnosed between 1995 and 2019. We estimated standardized incidence ratios (SIRs) for combined and site-specific SPCs using incidences for England, overall and by age at BC and socioeconomic status. We estimated incidences and Kaplan–Meier cumulative risks stratified by age at BC, and assessed risk variation by socio-demographic, tumour, and treatment characteristics using Cox regression. Findings: both genders were at elevated contralateral breast (SIR: 2.02 (95% CI: 1.99–2.06) females; 55.4 (35.5–82.4) males) and non-breast (1.10 (1.09–1.11) females, 1.10 (1.00–1.20) males) SPC risks. Non-breast SPC risks were higher for females younger at BC diagnosis (SIR: 1.34 (1.31–1.38) <50 y, 1.07 (1.06–1.09) ≥50 y) and more socioeconomically deprived (SIR: 1.00 (0.98–1.02) least deprived quintile, 1.34 (1.30–1.37) most). Interpretation: Enhanced SPC surveillance may benefit BC survivors, although specific recommendations require more detailed multifactorial risk and cost-benefit analyses. The associations between deprivation and SPC risks could provide clinical management insights. Funding: CRUK Catalyst Award CanGene-CanVar (C61296/A27223). Cancer Research UK grant: PPRPGM-Nov 20∖100,002. This work was supported by core funding from the NIHR Cambridge Biomedical Research Centre (NIHR203312)]. The views expressed are those of the author(s) and not necessarily those of the NIHR or the Department of Health and Social Care.</p
Town of Athabasca 75th Anniversary Celebration - 03
No full textPhotograph - Registration table at the Town of Athabasca 75th Anniversary Celebration, Athabasca, Alberta. Left to right: Edith Jordan, Paddy Jordan, and Eileen Hend
Livable city: An approach to pedestrianization through tactical urbanism
No full textMany ancient cities around the world were known with their livability. However, these cities started to lose this feature, when vehicles became prior to pedestrians who lost their sense of place, as many negative impacts came along. In return, people escaped the city’s core searching for lively districts with attractive streets where the human basic activities can be performed. As a result, dead city centers were left behind. The present paper work proposes an integrative literature between the pedestrianization and livability, then analyze the precedent approaches to pedestrianization in global review, and introduce a creative implementation approach to pedestrianization in order to achieve the following objectives: (1) a tool to break the various barriers that may face implementation, (2) a method of exploration regarding the potential of the misused asphalt, (3) a tactic to re-attract people to the city’s core and its walkable environment and finally, (4) restore the city’s livability thus its sustainable urban development. From this perspective, by rejuvenating the core of a city, the entire city’s livability could be restored, causing a sustainable urban development, through the creative tactical urbanism. Also, the paper includes an analysis of international examples, based on the criterion of tactical urbanism practices. Keywords: Livability, Pedestrianization, Sustainable urban development, Tactical urbanis
Monika histogrammes, diagrammes, spectres
No full textThe collaboration of Nicolas Meeùs, François Picard, their doctoral students (Hend Zouari, Zied Zouari, Yassin Guettat, Youssef Chédid, Wang Weiping) and Alice Tacaille led to important achievements using the calculation method called Monika, It culminated with Philippe Cathé and Vincent Boucheau in the convergences between representations of a piece of music in the form of a histogram of the pitches, a diagram of melodic analysis and eventually the observation of a convergence between these representations of the music from the musical notation and from the analysis of the audio file.La collaboration de Nicolas Meeùs, de François Picard, de leurs doctorantes et doctorants (Hend Zouari, Zied Zouari, Yassine Guettat, Youssef Chédid, Wang Weiping) et d’Alice Tacaille a mené à des réalisations importantes utilisant le procédé de calcul appelé Monika, et abouti grâce à Philippe Cathé et Vincent Boucheau à des convergences entre des représentations d’un morceau de musique sous forme d’histogramme des hauteurs, de diagramme d’analyse mélodique et enfin à l’observation d’une convergence entre ces représentations de la musique à partir de la notation musicale et à partir de l’analyse du fichier audio
The Effect of Oral Laxatives on Rectal Distension and Image Quality in Magnetic Resonance Imaging of the Prostate.
No full textThis is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Introduction Increasing rectal size is associated with increased artefacts on magnetic resonance imaging (MRI) of the prostate and has the potential to degrade image quality. The objective of this study was to analyse the effect of oral laxative medication on rectal distension and image quality in prostate MRI. Methods Eighty patients prospectively received either 15 mg of oral senna (laxative group) or no medication (control group). Patients underwent prostate MRI according to standard local protocol and seven rectal dimensions on axial and sagittal images were measured. A subjective assessment of rectal distension was also made using a five-point Likert scale. Finally, artefacts on diffusion-weighted sequences were assessed using a four-point Likert scale. Results There was a small reduction in rectal diameter on sagittal images in the laxative group compared to the control group, with mean diameters of 27.1 mm and 30.0 mm respectively, p=0.02. There was no significant difference in rectal measurements of anteroposterior diameter, transverse diameter, or rectal circumference on axial imaging. Subjective scoring also demonstrated no significant difference in diffusion-weighted imaging quality between the laxative group and control group, p=0.82. Conclusion Bowel preparation with the oral laxative, senna, provided only a marginal decrease in rectal distension on one measure and no reduction in artefacts on diffusion-weighted sequences. The findings of this study do not support the routine use of this medication in patients undergoing prostate MRI
The effectiveness of four methods for stain removal from direct resin-based composite restorative materials
No full textAbstractBackground/purposeFew studies investigated the best method for removing stains from different types of resin-based composite restorations and compared them to the more recently introduced nanocomposites. This study compared the effect of four methods for stain removal from composite resins; finishing with Sof-lex disks, using pumice and brush, bleaching with 10% carbamide peroxide and 38% hydrogen peroxide.Materials and methodsTwenty disk specimens were prepared. Specimens were immersed in a staining solution for 3weeks. The stained surfaces of five specimens from each RBC material were treated with one of the treatment procedures. Colorimetric measurements were taken using spectrophotometer prior to and after staining, and then repeated after surface treatments. Color difference values were calculated.ResultsOne-way ANOVA indicated significant differences in color change of the three composite resin materials following staining. Filtek Z250 showed the least susceptibility to discoloration followed by Renamel, Filtek Supreme was the material most prone to discoloration. Two-way ANOVA and Tukey’s Post Hoc showed that all stain removing procedures except polishing with pumice, were able to return Filtek Z250 to clinically acceptable color difference. While bleaching with 38% carbamide peroxide was not effective with Renamel. Only pumice and 10% carbamide peroxide were able to return Renamel to clinically acceptable color difference.ConclusionCompositions of resin-based composite resins play an important role in their susceptibility to stain and their amenability to stain removal procedures. Home bleaching showed good results for the three materials, while office bleach was the least effective
Rethinking the Infra- Culture space: bridging, providing, enhancing
No full textMashhad has been geopolitically an important city in the region and a trade and connection hub to Central and East Asian countries. It is also the second-largest Muslim pilgrimage city after Mecca. It is a global city for which religion shaped the identity and influenced the spatial configuration of the city.Religion, politics and economics are the main forces which run the city and have not only affected the growth and development of the whole city but are involved in the shift toward a large-scale infrastructure, which has become a dominant idea of city planning during the last few centuries. Overlapping the flows and its agencies reveals that district six is the logistic hub and the entrance to the city, it encounters both scales regional and local, therefore it is the site of intervention. Mapping the different flows, spaces and everyday life reveals that the big infrastructure is informed, and has strong connectivity with its surrounding region however it creates discontinuous relationships on the local scale, the local scale is neglected. moreover, its main spaces are economic driving, and the marginal settlement, are result of this spaces.People are vulnerable society, they have access only to groundwater due to technical problems associated with expansion of the system in marginal areas, groundwater is highly contaminated. The project aims to bridge not only physically but also socially culturally and environmentally. It is located within the infrastructure node (Ghadir square) transferring its space into Hybrid spaces which have multifunctional use, inhabiting the infrastructure space and transforming its spaces into places. Its atmosphere encounters both natural and urban, regional and local. The main emphasis is on the water, driving from the research, the project is an assemblage of different function water filtration system, metro, market, educational centre, parking and communal spaces, each function with its own individual character has its border and territorial scale but all are connected to the central park and water tank. Creating neighbourhood identities based on their distinctive interrelationship with water. Architecture, Urbanism and Building Sciences | Borders and Territorie
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