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Semimartingale dynamics for a backward exchange rate process

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Probability, Uncertainty and Quantitative risk 2024年第3期9卷 371-388页

作者： Gregory gagnon Department of Economics University of Toronto Mississauga3359 Mississauga RoadMississaugaOntarioL5L 1C6Canada

Via a forward SDE solution(k_(t),t≥O)that captures money supply dynamics,a macroeconomic model known as the monetary model generates a backward exchange rate process(y_(t),t≥0).For any t≥0,y_(t)=k_(t)+α^(-1)μ_(t) where(μ_(t),t≥0)is a backward process andα>0 is a ***,(y_(t),t≥O)does not satisfy a conventional *** paper proves(y_(t),t≥O)is a continuous semimartingale when restrictions on the SDE for(k_(t),t≥O)capture anti-inflationary *** new result in economic dynamics does not require the filtration to be the Brownian filtration.

关键词： Backward process Semimartingale Anti-inflationary SDE policy

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胎儿声振刺激

国外医学（妇产科学分册） 1990年第5期17卷 283-284页

作者： gagnon r 刘维如吉名显

本文目的是复习新生儿和胎儿对外源声、振的反应,概述声刺激与NST结合在评价胎儿健康中的临床意义。一、胎儿对声振刺激的反应许多外部声振刺激可增加胎心率(FHr)的反应性。一种电子人工喉(EAL)的振动声刺激(VAS)目前已广泛应用于评价... 详细信息

本文目的是复习新生儿和胎儿对外源声、振的反应,概述声刺激与NST结合在评价胎儿健康中的临床意义。一、胎儿对声振刺激的反应许多外部声振刺激可增加胎心率(FHr)的反应性。一种电子人工喉(EAL)的振动声刺激(VAS)目前已广泛应用于评价胎儿健康。这种装置可产生一种87Hz基本频率的宽带噪声,在距声源1.5cm处的空气中可测得高达15 000Hz的多重泛音,平均声压水平(SPL)为110dB。此前曾推测放置在母腹表面的EAL产生的子宫内SPL不会超过子宫内背景噪声的SPL。

关键词：胎儿声振刺激

Plasticity in the antipredator behavior of the orange-footed sea cucumber under shifting hydrodynamic forces

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Current Zoology 2019年第6期65卷 685-695页

作者： Nicholas A.W.BrOWN David r.WILSON Patrick gagnon Department of Ocean Sciences Memorial University of NewfoundlandSt.John'sNewfoundlandA1C 5S7Canada Department of Psychology Memorial University of NewfoundlandSt.John'sNewfoundlandA1B 3X9Canada

Marine invertebrates that move too slowly to evade unfavorable environmental change may instead exhibit phenotypic plasticity,allowing them to adjust to varying *** orange-footed sea cucumber Cucumaria frondosa is a slow-moving suspension feeder that is preyed on by the purple sunstar Solaster *** sea cucumber's antipredator behavior involves changing shape and detaching from the substratum,which might increase its probability of being displaced by water motion into an unsuitable *** hypothesized that sea cucumbers'antipredator responses would be diminished under stronger hydrodynamic forces,and that behavioral strategies would be flexible so that individuals could adjust to frequent changes in water *** a natural orange-footed sea cucumber habitat,individuals lived along a pronounced hydrodynamic gradient,allowing us to measure antipredator behavior under different water flow *** placed purple sunstars in physical contact with sea cucumbers living at various points along the gradient to elicit antipredator *** then repeated this procedure in a laboratory mesocosm that generated weak and strong hydrodynamic forces similar to those observed at the field *** in the mesocosm experiment were tested in both wave conditions to determine if their antipredator behavior would change in response to sudden environmental change,as would be experienced under deteriorating sea *** responses did not covary with hydrodynamic forces in the ***,antipredator responses in the mesocosm experiment increased when individuals were transplanted from strong to weak forces and decreased when transplanted from weak to strong ***,our results indicate environmentally induced plasticity in the antipredator behavior of the orange-footed sea cucumber.

关键词： behavioral plasticity benthic invertebrate predator-prey interaction reciprocal transplant experiment Solaster endeca.wave environment

Vortex　Simulation　of　Axisymmetrical　Flows　in　Cylindrical　***：Application　to　Pipes　Incorporating　an　Orifice　Plate

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Journal of Thermal Science 1995年第4期4卷 221-228页

作者： André Giovannini Yves gagnon Université Paul Sabatier and Centre d’études et de recherches de Toulouse Toulouse France Université de Moncton Campus d’Edmundston Edmundston Canada

The random Vortex Method extended to an azisymmetrical flow is used in the study of the flow field inside pipes incorporating an orifice plate with different contraction ratios and different inlet velocity profiles. Three test-cases, each having experimental measurements available in the literature, are studied. In particular, instantaneous and average velocity fields along with the turbulent statistics for high reynolds number flows are computed and compared to the corresponding experimental *** comparisons show the ability and the citations of the method. The results of the numerical simulations are used in the physical analysis of the flow fields and thus allow for a better understanding of the dynamics of the flow in pipes incorporating an orifice plate.

关键词： orifice plate axisymmetrical flows vorticity.

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Structure of Channel Flows with Surface Mounted ribs

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Journal of Thermal Science 2004年第3期13卷 213-219页

作者： Gérard J. POITrAS Laurent-Emmanuel BrIZZI Yves gagnon Université de Moncton Moncton (NB) CanadaLaboratoire d'études aérodynamiques Université de Poitiers 86960 Futuroscope FranceUniversité de Moncton Edmundston (NB) Canada

The flow inside a channel with surface mounted ribs is studied by numerical simulation and experimental flow visualization. Both the geometry with one rib and the geometry with two ribs, placed perpendicular to the flow, are studied, with particular emphasis on the effect of the variation of the distance between the ribs on the structure of the flow. results show that, for reynolds number flows of 400 and 1000 (based on the uniform incoming velocity and the height of the ribs), the flow reattaches between the ribs when they are separated by distances of 12h (h being the height of the ribs) and 6h, respectively. In this respect, however, the numerical results for the reynolds number flow of 1000 are in contradiction with published results.

关键词： vortex methods flow visualization channel flows ribs.

A CK2-rNF4 interplay coordinates non-canonical SUMOylation and degradation of nuclear receptor FXr

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Journal of Molecular Cell Biology 2017年第3期9卷 195-208页

作者： Stephanie Bilodeau Veronique Caron Jonathan gagnon Alexandre Kuftedjian Andre Tremblay research Center CHU Sainte-Justine Montreal Quebec H3T 1C5 Canada Department of Biochemistry and Molecular Medicine Faculty of Medicine University of Montreal Montreal Quebec H3T 1J4 Canada Department of Obstetrics & Gynecology Faculty of Medicine University of Montreal Montreal Quebec H3T 1J4 Canada

Farnesoid X receptor （FXr） is a ligand-activated nuclear receptor that plays a central role in regulating genes involved in bile acid homeostasis, and fat and glucose metabolism. Here, we demonstrate a post-translational interplay between FXr phosphoryl- ation, SUMOylation, and ubiquitination that directs the receptor into an activation-degradation pathway in hepatocytes. We iden- tify a non-canonical SUMOylation motif termed pSuM that conjugates SUM02 at Lys-325 of FXr under the direct control of casein kinase 2 （CK2）, which provides the required negative charge for Ubc9 and PIAS1 to perform SUMOylation, by phosphorylating Ser-327. Lys-325 SUMOylation is indispensable to the promotion of efficient ligand activation and transcriptional coactivation of FXr. Constitutive pSuM activation using a phospho-mimic Ser-327 mutant or catalytic CK2 expression strongly induces SUM02 conjugation, which directs FXr ubiquitination and proteasome-dependent degradation. We also determine that such SUMOylation-dependent ubiquitination of FXr is mediated by the E3 ubiquitin ligase rNF4, which is required to achieve maximal induction of FXr and optimal up- or downregulation of responsive genes involved in bile acid homeostasis and liver regeneration. Our findings identify a highly regulated atypical SUMO conjugation motif that serves to coordinate FXr transcriptional compe- tence, thereby expanding the intricate dynamics of the SUMOylation process used by incoming signals to govern metabolic gene regulation.

关键词： farnesoid receptor SUMOylation ubiquitination 26S proteasome bile acid

Mapping of cropland,cropping patterns and crop types by combining optical remote sensing images with decision tree classifier and random forest

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Geo-Spatial Information Science 2023年第3期26卷 302-320页

作者： Aqil Tariq Jianguo Yan Alexandre S.gagnon Mobushir riaz Khan Faisal Mumtaz State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina School of Biological and Environmental Sciences Liverpool John Moores UniversityLiverpoolUK School of Environmental Science Charles Sturt UniversityAlburyAustralia State Key Laboratory of remote Sensing Sciences Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences(UCAS) BeijingChina

Mapping and monitoring the distribution of croplands and crop types support policymakers and international organizations by reducing the risks to food security,notably from climate change and,for that purpose,remote sensing is routinely ***,identifying specific crop types,cropland,and cropping patterns using space-based observations is challenging because different crop types and cropping patterns have similarity spectral *** study applied a methodology to identify cropland and specific crop types,including tobacco,wheat,barley,and gram,as well as the following cropping patterns:wheat-tobacco,wheat-gram,wheat-barley,and wheat-maize,which are common in Gujranwala District,Pakistan,the study *** methodology consists of combining optical remote sensing images from Sentinel-2 and Landsat-8 with Machine Learning(ML)methods,namely a Decision Tree Classifier(DTC)and a random Forest(rF)*** best time-periods for differentiating cropland from other land cover types were identified,and then Sentinel-2 and Landsat 8 NDVI-based time-series were linked to phenological parameters to determine the different crop types and cropping patterns over the study region using their temporal indices and ML *** methodology was subsequently evaluated using Landsat images,crop statistical data for 2020 and 2021,and field data on cropping *** results highlight the high level of accuracy of the methodological approach presented using Sentinel-2 and Landsat-8 images,together with ML techniques,for mapping not only the distribution of cropland,but also crop types and cropping patterns when validated at the county *** results reveal that this methodology has benefits for monitoring and evaluating food security in Pakistan,adding to the evidence base of other studies on the use of remote sensing to identify crop types and cropping patterns in other countries.

关键词： Sentinel-2 random Forest cropland crop types cropping patterns Decision Tree Classifier

Numerical　Simulation　of　the　Flow　over　a　Model　of　the　Cavities　on　a　Butterfly　Wing

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Journal of Thermal Science 1995年第3期4卷 185-192页

作者： rodrigue Savoie Yves gagnon (University de Moncton, Campus d’Edmundston, Edmundston (NB) Canada) Université de Moncton Campus d’Edmundston Edmundston Canada

The objective of this paper is to present results of numerical simulations for the flow over cavities modeling the scale structures on the upper surface of a typical butterfly wing. The numerical results,obtained using a vortex method, show that the dynamics of the flow are strongly dependent on the reynolds number of the flow. The large coherent structures, formed in the cavity of adjoining scales, exhibit a stationary behaviour for low reynolds number flows, while they exhibit strong dynamics and instabilities for high reynolds number flows. The numerical results are in very good agreement with corresponding experimental results available in the literature.

关键词： vortex methods vorticity cavity butterfly.

Health 3.0—The patient-clinician “arabic spring” in healthcare

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Health 2012年第2期4卷 39-45页

作者： Serge gagnon Laurent Chartier research and Intervention Centre for Healthy Workplaces (CrISO) McGill University Health Centre Montréal Quebec Canada

A growing number of citizen-patients and clinicians use Communication and Self-Managed Health Technologies (CSMHT) in their relationship. Doing so, they shift from the current paradigm of dependency to a co-responsibility paradigm in healthcare. Facing the runaway utilization of health services, we need to think “outside the box” to unblock the system. A Health 3.0 development model of governance that position patients as primary members of the clinicians’ team is presented to map this institutional transformation. At the practical level, an MD 3.0 relational model and a Citizen-Patient 3.0 behavioral profile are presented.

关键词： Dependency and Co-responsibility Paradigm Communication and Self-Managed Health Technologies Chronic Diseases runaway Utilization of Health Services Development Matrix of Health 3.0 Governance MD 3.0 relational Model Citizen-Patient 3.0 Behavioral Profile