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Relative abundance of American badger (Taxidea taxus) and red fox (Vulpes vulpes) in landscapes with high and low rodenticide poisoning levels

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Integrative Zoology 2012年第1期7卷 41-47页

作者： Gilbert PROULX Neil mackenzie Alpha Wildlife Research&Management Sherwood ParkAlbertaCanada

Over the past decade,extensive poisoning campaigns have been conducted in southern Saskatchewan to control Richardson’s ground squirrel Spermophilus richardsonii(Sabine,1822)*** campaigns might impact on predator abundance by decreasing prey levels,and also through secondary *** spotlighting,we investigated the relative abundance of American badgers Taxidea taxus(Schreber,1777)and red fox Vulpes vulpes(Linnaeus,1758)in 2 study areas with road access and crops,but with different levels of *** the study area with relatively low poisoning(19.6%of the area traversed by roads),there were 2.2 times more American badgers per km of road and 6.4 times more red foxes per km than in the study area with high poisoning(89.7%of the area).It is recommended that an Integrated Pest Management program be developed to conserve natural predators across landscapes.

关键词： ground squirrels poisoning populations predators

Effects of temperature change on mussel,Mytilus

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Integrative Zoology 2012年第3期7卷 312-327页

作者： mackenzie L.ZIPPAY Brian HELMUTH Environment and Sustainability Program Department of Biological SciencesUniversity of South CarolinaColumbiaSouth CarolinaUSA

An increasing body of research has demonstrated the often idiosyncratic responses of organisms to climate-related factors,such as increases in air,sea and land surface temperatures,especially when coupled with non-climatic *** argues that sweeping generalizations about the likely impacts of climate change on organisms and ecosystems are likely less valuable than process-based explorations that focus on key species and *** in the genus Mytilus have been studied for centuries,and much is known of their physiology and *** other intertidal organisms,these animals may serve as early indicators of climate change *** structuring species,their survival has cascading impacts on many other species,making them ecologically important,in addition to their economic value as a food ***,we briefly review the categories of information available on the effects of temperature change on mussels within this *** a considerable body of information exists about the genus in general,knowledge gaps still exist,specifically in our ability to predict how specific populations are likely to respond to the effects of multiple stressors,both climate and non-climate related,and how these changes are likely to result in ecosystem-level *** this genus provides an excellent model for exploring the effects of climate change on natural and human-managed ecosystems,much work remains if we are to make predictions of likely impacts of environmental change on scales that are relevant to climate adaptation.

关键词： climate change mussels Mytilus organismal responses temperature

An r-Adaptive Finite Element Method for the Solution of the Two-Dimensional Phase-Field Equations

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Communications in Computational Physics 2006年第5期1卷 805-826页

作者： G.Beckett j.A.mackenzie M.L.Robertson Department of Mathematics University of StrathclydeLivingstone Tower26 Richmond StreetGlasgow G11XHScotland

An adaptive moving mesh method is developed for the numerical solution of two-dimensional phase change problems modelled by the phase-field *** numerical algorithm is relatively simple and is shown to be more efficient than fixed grid *** phase-field equations are discretised by a Galerkin finite element *** adaptivity criterion is used that ensures that the mesh spacing at the phase front scales with the diffuse interface thickness.

关键词： Phase change phase-field equidistribution moving meshes adaptive method

Association of homocysteine and smoking with cerebral microemboli in patients with mechanical heart valves:a transcranial Doppler study

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Stroke & Vascular Neurology 2017年第4期2卷 199-204页

作者： Alicia Mattia M Reza Azarpazhooh Claudio Munoz Chrysi Bogiatzi mackenzie A Quantz j David Spence Stroke Prevention and Atherosclerosis Research Centre Robarts Research InstituteWestern UniversityLondonOntarioCanada Department of Neurology McMaster UniversityHamiltonOntarioCanada Division of Epidemiology and Biostatistics Western UniversityLondonOntarioCanada Division of Neurology Western UniversityLondonOntarioCanada Division of Cardiac Surgery Western UniversityLondonOntarioCanada Division of Clinical Pharmacology Western UniversityLondonOntarioCanada

Objectives Microembolic signals(MES)on transcranial Doppler(TCD)predict stroke and cognitive *** levels of total homocysteine(tHcy),a prothrombotic factor,are higher in patients with microemboli in carotid stenosis and in patients with paradoxical *** this study we assessed the association between the level of tHcy and the number of MES in patients with mechanical heart valves(MHVs).Methods TCD monitoring was performed to detect MES before and after breathing 100% oxygen and repeated every 2-4 weeks up to six *** Twenty-five patients with MHVs(mean age:63.60±10.15 years)participated in this study;15 were men(66.47±7.25 years)and 10 were women(59.30±12.60 years).In total,there were 126 study *** multiple regression,higher tHcy was associated with more MES in both preoxygenation(OR 1.34(95%CI 1.07 to 1.68,P=0.009))and postoxygenation(OR 1.40(95% CI 1.07 to 1.83,P=0.01))*** smoking and the length of time between the operation and monitoring also correlated with a higher number of MES before and after breathing oxygen,particularly in *** Higher tHcy and smoking were associated with a higher MES count in both preoxygenation and postoxygenation *** smoking can be stopped and hyperhomocysteinaemia is treatable,these are clinically important findings.

关键词： patients assessed cerebral

Calibration of the DEM sliding friction and rolling friction parameters of a cohesionless bulk material

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Particuology 2024年第9期92卷 126-139页

作者： jonatan Marín Pérez Tugrul Comlekci Yevgen Gorash Donald mackenzie University of Strathclyde 75 Montrose StreetG11XJGlasgowUnited Kingdom

The discrete element method(DEM)has become a valuable tool for understanding the mechanical behaviour of granular assemblies,however,the accuracy of the DEM simulations depends on several interaction parameters such as the sliding friction and rolling friction ***,these parameters are estimated using bulk calibration approach(BCA)where the draw down test has been suggested as an effective way to approach these *** test provides up to four bulk criteria,the angle of repose,shear angle,mass flow rate and the mass loss which are used to narrow down the possible ***,there is still more research needed around it to fully understand how this methodology *** experimental and numerical study was carried out using the draw down test to assess the influence of different mass flow rates and particle shapes on DEM parameters for a cohesionless bulk *** is concluded that use of multi-sphere particles and three aperture sizes in the draw down test to calibrate the sliding and rolling friction parameters of a cohesionless bulk material can converge to a small feasible region in which a single combination of the friction coefficients can be *** calibrated sliding and rolling friction coefficients were validated using multi-sphere particles,where the maximum deviation was 5.9%from the experimental values.

关键词： Discrete element method Calibration Draw down Sliding friction Rolling friction Particle shape

Towards a precision psychiatry approach to anxiety disorders with ecological momentary assessment:the example of panic disorder

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General Psychiatry 2020年第1期33卷 23-29页

作者： Donald j Robinaugh mackenzie L Brown Olivia M Losiewicz Payton j jones Luana Marques Amanda W Baker Department of Psychiatry Massachusetts General HospitalBostonMassachusettsUSA Department of Psychiatry Harvard Medical SchoolBostonMassachusettsUSA Department of Psychology Harvard UniversityCambridgeMassachusettsUSA

Background Treatments for anxiety disorders are among the most effective in ***,there is considerable room for *** In this paper,we discuss the value of ecological momentary assessment as a research method and clinical *** We begin by describing ecological momentary assessment and its advantages,including the ability to collect ecologically valid information about mental disorders,in real time,in individual *** then illustrate the value of this approach for anxiety disorder treatment using two patients with panic disorder who completed ecological momentary assessments for 2 weeks before and after a cognitive-behavioural therapy *** focus especially on two key pieces of information provided by ecological momentary assessment data:information about symptom dynamics and information about the relationships among symptoms as they unfold overtime within individual *** Although considerable work is needed to further develop this methodology in the context of anxiety disorder treatment,we believe that these pieces of information may ultimately inform our understanding of how anxiety disorder treatments have their effect and how those treatments can be tailored to individual patients.

关键词： disorders moment treatment

Assessment of coastal and mangrove vulnerability in the Andaman Island,Indian Ocean

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Geoscience Frontiers 2024年第5期15卷 47-60页

作者： Biswajit Mondal Rupesh K.Bhomia Ashis Kumar Saha Richard A.mackenzie Department of Geography Delhi School of EconomicsUniversity of DelhiDelhi 110007India Centre for International Forestry Research(CIFOR) Jalan CIFORSitu GedeBogor BaratBogor 16115Indonesia Institute of Pacific Islands Forestry Pacific Southwest Research StationUSDA Forest ServiceHiloHI 96720USA

Coastal regions are highly susceptible to the effects of global warming,including rising atmospheric and sea surface temperatures,increased cyclone frequency,and sea level ***,it is imperative to examine coastal vulnerability to minimize the impact of multiple hazards and protect coastal resources,such as *** in India studying the vulnerability of coastal zones of Andaman and Nicobar Islands which fall in seismic zone V is critical for conservation *** conducted a vulnerability analysis of coastal zones impacted by the 2004 earthquake,causing varying degrees of ground upliftment and *** compared coastal vulnerability among sites that experienced uplift,no change,and subsidence(the southern portion).Our analysis utilized the Coastal and Mangrove Vulnerability Index(CVI and MVI)to measure and compare vulnerability in six zones distributed along uplift and subsidence ***-resolution satellite imagery including WorldView-2,3,and GeoEye-1 from year 2022 are utilized on this *** CVI and MVI offers a good way to measure and compare vulnerabilities across sites and offer insights for better *** CVI and MVI results indicate that approximately 34%of coastal grids and over 23%of mangrove grids across all zones are highly to extremely highly *** zones were found to be more vulnerable than uplifted *** findings suggest that large-scale natural disturbances such as tectonic displacement have the potential to impact coastal vegetation and mangrove cover can become even more *** conclusion,our study emphasizes the importance of vulnerability analyses in coastal regions,especially in areas prone to seismic *** findings have direct implications for conservation and restoration efforts and underscore the need for continued monitoring and mitigation efforts to safeguard coastal resources for long-term sustainability.

关键词： Mangroves Coastal vulnerability Mangrove vulnerability 2004 Indian Ocean earthquake Andaman Island

Assessing vulnerability to panic:a systematic review of psychological and physiological responses to biological challenges as prospective predictors of panic attacks and panic disorder

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General Psychiatry 2019年第6期32卷 297-303页

作者： Donald j Robinaugh Meredith j Ward Emma R Toner mackenzie L Brown Olivia M Losiewicz Eric Bui Scott P Orr Department of Psychiatry Massachusetts General HospitalBostonMassachusettsUSA Department of Psychiatry Harvard Medical SchoolBostonMassachusettsUSA

Background Cognitive-behavioural theories of panic disorder posit that panic attacks arise from a positive feedback loop between arousal-related bodily sensations and perceived *** a recently develope computational model formalising these theories of pani attacks,it was observed that the response to a simulate perturbation to arousal provided a strong indicator of vulnerability to panic attacks and panic *** this/review,we evaluate whether this observation is borne o in the empirical literature that has examined responses biological challenge(eg,C02 inhalation)and their relatio to subsequent panic attacks and panic *** We searched PubMed,Web of Science and PsycINFO using keywords denoting provocation agents(eg,sodium lactate)and procedures(eg,infusion)combined with keywords relevant to panic disorder(eg,panic).Articles were eligible if they used response to a biologic challenge paradigm to prospectively predict panic attac or panic *** We identified four eligible *** effect sizes suggest that there is biological challenge response a moderate prospective association with subsequent pani attacks,but no prospective relationship with panic disorde Conclusions These findings provide support for the prediction derived from cognitive-behavioural theories an some preliminary evidence that response to a biological challenge may have clinical utility as a marker of vulnerab to panic attacks pending further research and developme Trial registration number 135908.

关键词： behaviour subsequent sizes

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生成式人工智能的惊人进展引发惊讶和担忧

Engineering 2023年第6期25卷 9-11页

作者： Dana mackenzie Senior Technology Writer

In 1950, computer pioneer Alan Turing proposed a test for artificial intelligence(AI) that came to be named after him: A machine with AI should be able to chat with a human and convince them it was human [1]. While it has become increasingly evident that the Turing test is not an adequate definition of AI, it has long been seen as an important milestone.

关键词：人工智能 computer artificial