163 research outputs found
Who is driving the bus? An analysis of author and institution contributions to entrepreneurship research
No full textGiven the considerable increase in entrepreneurship scholarship in the form of journal outlets, article publications, and university positions, it is important to identify the authors leading the charge to push the academic field forward. In this article, we provide an in-depth impact analysis of authors and their universities in terms of publishing high quality entrepreneurship research in leading entrepreneurship journals. Our analysis covers contributions made from 2011 to 2015 in the top six entrepreneurship-focused outlets. Study findings and implications are discussed
Life cycle assessment of biosolids land application and evaluation of the factors impacting human toxicity through plants uptake
No full textDue to the increasing environmental concerns in the wastewater treatment sector, the environmental impacts of organic waste disposal procedures require careful evaluation. However, the impacts related to the return of organic matter to agricultural soils are difficult to assess. The aim of this study is to assess the environmental impacts of land application of two types of biosolids (dried and composted, respectively) from the same wastewater treatment plant in France, and to improve the quantification of human toxicity.
A Life Cycle Assessment (LCA) was carried out on a case study based on validated data from an actual wastewater treatment plant. Numerous impacts were included in this analysis, but a particular emphasis was laid on human toxicity via plant ingestion. For six out of the height impact categories included in the analysis, the dried biosolids system was more harmful to the environment than the composting route, especially regarding the consumption of primary energy. Only human toxicity via water, soil and air compartments and ozone depletion impacts were higher with the composted biosolids
Preoperative nasopharyngeal swab testing and postoperative pulmonary complications in patients undergoing elective surgery during the SARS-CoV-2 pandemic.
No full textBACKGROUND: Surgical services are preparing to scale up in areas affected by COVID-19. This study aimed to evaluate the association between preoperative SARS-CoV-2 testing and postoperative pulmonary complications in patients undergoing elective cancer surgery. METHODS: This international cohort study included adult patients undergoing elective surgery for cancer in areas affected by SARS-CoV-2 up to 19 April 2020. Patients suspected of SARS-CoV-2 infection before operation were excluded. The primary outcome measure was postoperative pulmonary complications at 30 days after surgery. Preoperative testing strategies were adjusted for confounding using mixed-effects models. RESULTS: Of 8784 patients (432 hospitals, 53 countries), 2303 patients (26.2 per cent) underwent preoperative testing: 1458 (16.6 per cent) had a swab test, 521 (5.9 per cent) CT only, and 324 (3.7 per cent) swab and CT. Pulmonary complications occurred in 3.9 per cent, whereas SARS-CoV-2 infection was confirmed in 2.6 per cent. After risk adjustment, having at least one negative preoperative nasopharyngeal swab test (adjusted odds ratio 0.68, 95 per cent confidence interval 0.68 to 0.98; P = 0.040) was associated with a lower rate of pulmonary complications. Swab testing was beneficial before major surgery and in areas with a high 14-day SARS-CoV-2 case notification rate, but not before minor surgery or in low-risk areas. To prevent one pulmonary complication, the number needed to swab test before major or minor surgery was 18 and 48 respectively in high-risk areas, and 73 and 387 in low-risk areas. CONCLUSION: Preoperative nasopharyngeal swab testing was beneficial before major surgery and in high SARS-CoV-2 risk areas. There was no proven benefit of swab testing before minor surgery in low-risk areas
The Film and Audiovisual Production in Montreal: Challenges of Relational Proximity for the Development of a Creative Cluster
No full textFilm and audiovisual production are part of the new media sector, one of the main sectors of the creative industries. The sector has evolved from purely audiovisual techniques to various creative specialized services used in television, advertising, and motion pictures. Montreal has long been known as an important North American hub for film and audiovisual production. This reputation has continued over recent years with important developments in the visual effects sector. However, increased competition over recent years and the desire to maintain activity in Montreal have spurred interest for the application of a cluster policy in the film and audiovisual sector, and interest in relational proximity has increased in order to ensure this creative industry's future. We investigated the birth of the cluster policy in this sector and this article discusses the challenges and difficulties in developing cooperation between businesses of a competitive creative sector, highlighting the fact that geographic or physical proximity is not enough and that relational proximity is not so easy to develop. It also highlights sources of success and thus can be useful for a better understanding of proximity issues in relation to creative cluster development. [ABSTRACT FROM AUTHOR]
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Experimental Determination of R Curves for European Spruce Using DCB Tests
No full textThis paper presents an experimental procedure for obtaining the fracture resistance (R curve) of solid wood specimens made of spruce. Double Cantilever Beam (DCB) tests were performed in order to determine energy release rate vs crack length in Mode I wood fracture (crack opening). Ten wood specimens were loaded using the Universal Testing Machine and force-displacement curves were recorded. The most important parameter - crack length was monitored as the crack propagates using Digital Image Correlation (DIC) method. In order to obtain accurate R curve results, procedure which includes calculating cumulative released energy was employed. The cohesive energy Gf was determined based on the R curves. These results can further be analysed in order to obtain cohesive law for Mode I fracture of wood.Steel & Composite Structure
A Meta-Analysis of Genome-Wide Association Scans Identifies IL18RAP, PTPN2, TAGAP, and PUS10 As Shared Risk Loci for Crohn's Disease and Celiac Disease
No full textThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Steel sharpens steel: A review of multilevel competition and competitiveness in organizations
No full text
R script and datasets for "Proactive use of intensive aversive conditioning increases probability of retreat by coyotes"
No full textLajeunesse, G., Smith, E. W., Harshaw, H. W., and St. Clair, C. C. 2023. Proactive use of intensive aversive conditioning increases probability of retreat by coyotes. Ecosphere (in press). This Figshare repository provides the R code and the datasets (aversive conditioning events conducted by the wildlife professionals, public reports of coyote sightings and encounters from the City of Calgary's civic reporting database) which can be used to reproduce all analyses and statistical tests for the manuscript 'Proactive use of intensive aversive conditioning increases probability of retreat by coyotes'. If you have questions or concerns with this file, or trouble downloading it, please contact the first author at [email protected].</p
Quantification of interfacial polymerization covalent organic framework membrane physicochemical composition and performance
No full textSubmission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01The student, Gabrielle Lawrence, accepted the attached license on 2021-11-05 at 13:29.The student, Gabrielle Lawrence, submitted this Dissertation for approval on 2021-11-05 at 13:46.This Dissertation was approved for publication on 2021-11-11 at 14:30.DSpace SAF Submission Ingestion Package generated from Vireo submission #17186 on 2022-04-29 at 16:09:30Made available in DSpace on 2022-04-29T21:58:21Z (GMT). No. of bitstreams: 2
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Previous issue date: 2021-11-11Embargo set by: Seth Robbins for item 123421
Lift date: 2024-04-29T21:58:46Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemAuthor requested closed access (OA after 2yrs) in Vireo ETD systemLimitedForty percent of the world suffers from water scarcity and a lack of safe drinking water due to record population growth, accelerated development, and climate change, making it essential to start emphasizing sustainable and efficient water treatment technologies. Pressure driven membrane systems are a promising technology that can be used effectively to recycle freshwater, seawater, municipal wastewater effluent or industrial water to potable quality. Commercial membrane products typically consist of an asymmetric thin-film composite (TFC) structure: a polymeric thin active layer supported by an ultrafiltration membrane and a thick fiber backing. While this structure allows reverse osmosis (RO) and nanofiltration (NF) membrane systems to remove a wide range of water contaminants with no chemical additives or thermal input, the relatively limited polymeric surface chemistry currently available restricts the range of water permeability and solute selectivity achieved.
An alternative to conventional polymeric membrane materials are two-dimensional covalent organic frameworks (COFs). 2D COFs have a crystalline structure created by strong covalent bonds made through synthetic reactions of organic building units. This structure provides a well-organized layer, reducing surface roughness, with pore size control based on chosen building units, allowing the user more control over membrane performance. Utilizing the up-scalable TFC structure formation of commercial membrane products, an ultrathin COF film can form on an ultrafiltration membrane support by interfacial polymerization (IP), creating a novel NF TFC membrane.
This research presents a robust analysis of IP COF NF membranes, utilizing novel materials characterization techniques to quantify film composition and structure. Key material properties of COF films are assessed including modularity, crystallinity, and chemical stability. The impact of COF monomer selection was assessed through a comparative analysis of three imine-linked COF films, ultimately showing that COF building units significantly influence membrane performance. The performance of these three materials illuminated critical questions about the IP COF membrane configuration, motivating an in-depth analysis to quantify the degree of COF formation. Using Rutherford backscattering spectrometry (RBS) and heavy counterion probe solutions, COF material properties were obtained and lead to the realization that IP COF films were made up of small platelets rather than large sheets. This experimental method provided pathways to understand other material characteristics of the COF films, including oxidation tolerance, an important parameter for a water treatment application. A key takeaway from each of these studies is although the COF formation and performance is not ideal, the resulting films still exhibit properties that when controlled will result in extraordinary attributes for the next generation of membrane materials
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