991 resultados para Lawson, Mike


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Australian property bond markets are starting to improve, but don’t expect a return to the buoyant days of the past any time soon.

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Accurate estimation of input parameters is essential to ensure the accuracy and reliability of hydrologic and water quality modelling. Calibration is an approach to obtain accurate input parameters for comparing observed and simulated results. However, the calibration approach is limited as it is only applicable to catchments where monitoring data is available. Therefore, methodology to estimate appropriate model input parameters is critical, particularly for catchments where monitoring data is not available. In the research study discussed in the paper, pollutant build-up parameters derived from catchment field investigations and model calibration using MIKE URBAN are compared for three catchments in Southeast Queensland, Australia. Additionally, the sensitivity of MIKE URBAN input parameters was analysed. It was found that Reduction Factor is the most sensitive parameter for peak flow and total runoff volume estimation whilst Build-up rate is the most sensitive parameter for TSS load estimation. Consequently, these input parameters should be determined accurately in hydrologic and water quality simulations using MIKE URBAN. Furthermore, an empirical equation for Southeast Queensland, Australia for the conversion of build-up parameters derived from catchment field investigations as MIKE URBAN input build-up parameters was derived. This will provide guidance for allowing for regional variations in the estimation of input parameters for catchment modelling using MIKE URBAN where monitoring data is not available.

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While reviewing this book, I was not of the target audience. For example, there is a first chapter (presented as a case study, and integrated in an unconvincing manner into the remainder of the book) that obviously meant to soften the book for the lay person. In the third chapter, the authors provide their philosophical interpretation on the meaning of breasts for reasons that entirely escape me, and that have no relation to the book as a whole. Finally, there are potted histories of the heroics of ‘tireless’, ‘dedicated’ and ‘earnest’ epidemiologists, some of whom have nothing to do with breast cancer or the book at all. Despite this lack of focus, the authors give an honest and coherent account of the current state of breast cancer research from an epidemiological viewpoint...

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Digital Image

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本文对崔—Lawson模型与logistic方程进行了比较,指出了以营养动力学为基础的崔—Lawson模型关于生物物种与营养环境之间关系的内涵思想,从而揭示了崔—Lawson模型比logistic方程之所以深刻的关键所在。本文通过对棕色固氮菌的菌体培养实验,系统地验证了以营养动力学为基础的崔—Lawson模型思想,并且对实验数据分别进行了崔—Lawson模型及logistic方程拟合。对两个模型拟合出的残差平方和进行了比较。证实崔—Lawson模型比logistic方程更适合于对实验资料的描述。并且随着营养水平逐渐降低,logistic方程拟合的残差平方和逐渐减小,从而说明只有在营养水平低的情况下,才适合用logistic方程,而通常情况下,用logistic方程是不合适的。

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由于森林资源在提供生产/生活资料和维持整个生物圈平衡中的重要作用。森林资源管理在可更新资源管理中地位举足轻重。本文以营养动力学的基本观点和崔-Lawson模型为基础。将森林的收获过程看成是一个调节营养条件的过程。借助最优控制等方法。研究了单种群森林资源的管理策略和理论。1、评价了目前森林(生物)资源经营管理的若干主要原则。指出统一认定的资源管理原则是不存在的。人们对众原则的取舍将根据需要而定。2、根据MSY原则,着重研究了收获强度与收获量之间的关系。得到了连续收获过程的最优收获策略。同时,建立了间断收获过程的数学模型。3、以日本落叶松(Larix leptolepis)人工林为例进行了实例分析。得到了日本落叶松林最优收获策略并分析了日本落叶松种群灭绝时间与收获强度u_(max)之间的关系。

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Prokaryotes represent one-half of the living biomass on Earth, with the vast majority remaining elusive to culture and study within the laboratory. As a result, we lack a basic understanding of the functions that many species perform in the natural world. To address this issue, we developed complementary population and single-cell stable isotope (C-13)-linked analyses to determine microbial identity and function in situ. We demonstrated that the use of rRNA/mRNA stable isotope probing (SIP) recovered the key phylogenetic and functional RNAs. This was followed by single-cell physiological analyses of these populations to determine and quantify in situ functions within an aerobic naphthalene-degrading groundwater microbial community. Using these culture-independent approaches, we identified three prokaryote species capable of naphthalene biodegradation within the groundwater system: two taxa were isolated in the laboratory (Pseudomonas fluorescens and Pseudomonas putida), whereas the third eluded culture (an Acidovorax sp.). Using parallel population and single-cell stable isotope technologies, we were able to identify an unculturable Acidovorax sp. which played the key role in naphthalene biodegradation in situ, rather than the culturable naphthalene-biodegrading Pseudomonas sp. isolated from the same groundwater. The Pseudomonas isolates actively degraded naphthalene only at naphthalene concentrations higher than 30 mu M. This study demonstrated that unculturable microorganisms could play important roles in biodegradation in the ecosystem. It also showed that the combined RNA SIP-Raman-fluorescence in situ hybridization approach may be a significant tool in resolving ecology, functionality, and niche specialization within the unculturable fraction of organisms residing in the natural environment.

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Référence bibliographique : Rol, 61696

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Professor Dickman examining the water.

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Transcript (original spelling and grammar retained): Chatham 17th Sept. 1812. Sir, I have just received a letter from Cap’n Clay informing me that boats will be ready at the Communication Bridge tomorrow morning by day break to return that part of the 9th Reg’t which are to embark on board the Success[?] and Melabar Troop Ships[?]—and that they will likewise be ready to receive [?] on Saturday next at the same time, the division intended for the Diomedes [?]. I have therefore given the Regiment orders accordingly –and will give every assistance respecting the heavy baggage required for its safety, until some arrangement is made for its conveyance from here—the Barrack Master having no vacant store for the purpose. I have the honor to be Sir your obed’t Ser’t R. Lawson M. Gen’l. Ass Qr Master Gen’l Canterbury. Chatham 17 Sept. 1812. M. …Lawson. That boats will be in readiness at day break on the 18th & 19th Ins. For convy. the 9th Reg &…..[?] to Baggage of that Corps …..