2,922 research outputs found
Linking remote sensing, land cover and disease
No full textLand cover is a critical variable in epidemiology and can be characterized remotely. A framework is used to describe both the links between land cover and radiation recorded in a remotely sensed image, and the links between land cover and the disease carried by vectors. The framework is then used to explore the issues involved when moving from remotely sensed imagery to land cover and then to vector density/disease risk. This exploration highlights the role of land cover: the need to develop a sound knowledge of each link in the predictive sequence; the problematic mismatch between the spatial units of the remotely sensed and epidemiological data and the challenges and opportunities posed by adding a temporal mismatch between the remotely sensed and epidemiological data. The paper concludes with a call for both greater understanding of the physical components of the proposed framework and the utilization of optimized statistical tools as prerequisites to progress in this field
Land cover classification using multi-temporal MERIS vegetation indices
No full textThe spectral, spatial, and temporal resolutions of Envisat's Medium Resolution Imaging Spectrometer (MERIS) data are attractive for regional- to global-scale land cover mapping. Moreover, two novel and operational vegetation indices derived from MERIS data have considerable potential as discriminating variables in land cover classification. Here, the potential of these two vegetation indices (the MERIS global vegetation index (MGVI), MERIS terrestrial chlorophyll index (MTCI)) was evaluated for mapping eleven broad land cover classes in Wisconsin. Data acquired in the high and low chlorophyll seasons were used to increase inter-class separability. The two vegetation indices provided a higher degree of inter-class separability than data acquired in many of the individual MERIS spectral wavebands. The most accurate landcover map (73.2%) was derived from a classification of vegetation index-derived data with a support vector machine (SVM), and was more accurate than the corresponding map derived from a classification using the data acquired in the original spectral wavebands
Simple drag prediction strategies for an Autonomous Underwater Vehicle’s hull shape
No full textThe range of an AUV is dictated by its finite energy source and minimising the energy consumption is required to maximise its endurance. One option to extend the endurance is by obtaining the optimum hydrodynamic hull shape with balancing the trade-off between computational cost and fluid dynamic fidelity. An AUV hull form has been optimised to obtain low resistance hull. Hydrodynamic optimisation of hull form has been carried out by employing five parametric geometry models with a streamlined constraint. Three Genetic Algorithm optimisation procedures are applied by three simple drag predictions which are based on the potential flow method. The results highlight the effectiveness of considering the proposed hull shape optimisation procedure for the early stage of AUV hull desig
THE CORRELATION OF THE MEDIEVAL EUROPEAN STATE AND LAW IN THE DOCTRINE OF P.A. KROPOTKIN
No full textThe actual task of Russian state studies and jurisprudence remains the opposition to the ideological and theoretical constructions of Russian classical anarchism. Purpose: to establish the most significant features and disadvantages of P.A. Kropotkin’s interpretation of the correlation of state and law on the example of Medieval Europe. When writing the article, the author applies interdisciplinary and class approaches. General scientific and specific scientific methods are used: historical, problem-theoretical, formal-logical, textual. Materials: monuments of law, other historical sources, foreign and national historiography. The analysis shows that P.A. Kropotkin’s works are characterised not only by a pronounced anti-exploitation pathos, but also by an equally pronounced tendentiousness. Results: aprioriism, anti-statism and antilegism, radical localism, Eurocentrism, diffusionism, cyclism and catastrophism, clothed in the form of postulates, predetermined P.A. Kropotkin’s one-sided interpretations of the interaction of the medieval European state with positive and customary law. In the first case, it took a purely causative form, and in the second, it was predominantly conflictual. These are the key flaws of P.A. Kropotkin’s correlation concept
Flow-induced gate vibrations: Prevention of sef-excitation computation of dynamic gate behaviour and the use of models
No full textThe objective of this study is to develop design criteria for the dynamic behaviour of gates and valves. To this end, a resume of existing theories is given as well as an extended analysis of the added water mass, hydrodynamic rigidity and damping (also negative damping or self-excitation) and excitation by turbulent flow. New computation methods are presented for self-exciting vibrations: The ensuing introduction of an instability indicator permits the prediction of such vibrations in the design phase. Methods are described to calculate the added water mass and water damping in flowing water. Also treated are the instability of overflowing and falling water nappes, the response of a mass-spring system to noise excitation by turbulence, and the technique of hydroelastic models. Prior publications by the author on these subjects are to be found in the Appendices.Hydraulic EngineeringCivil Engineering and Geoscience
Quality and qualities of design studies, design research and design
No full textGreen 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.Methodologie en Organisatie van Desig
Views of P.A. Krushevan on the National Problem in Russia: Moldavian or Russian Nationalist
No full textThe article deals with the national identity of P.A. Krushevan. Being of Moldavian nationality, he was a Russian conservative writer and journalist. At the beginning of the 19th century he served as a Russian nationalist in the political arena. The author shows that he was a supporter of Moldavian national traditions and a personality of the Moldavian national movement. At the same time Krushevan was an «imperial nationalist» and a Russian statesman. In behalf of Bessarabia peasants, he exposed the economic activity of «plutocracy», but he was a stranger to domestic anti-Semitism
Multi-wavelength analyses of gamma-ray bursts: Features of Swift GRBs and the blast wave model
No full textThe Nigerian Co-operative Law: Taking the Baton from P.A. Oluyede
No full textSome of the challenges hindering the development of co-operatives and their governing laws in Nigeria are the inadequacy of literature, and the lack of standardized classification on the subject of co-operative law. With the aim to identify and espouse relevant literature on the subject matter, this paper seeks to collect, collate and review the relevant literature. A classic was identified in the work of P.A. Oluyede (1988) Nigeria Administrative Law, in chapter four, entitled “Public Corporations, and Public Enterprises.” Among other findings, the learned author dedicated the chapter to the historical development of Nigerian co-operative societies and their governing laws, situated cooperatives as public enterprises, and made recommendations. Furthermore, it was observed that there have been few contributions within the annals of the Nigerian academic and research community on co-operative law. Thus, Oluyede’s classics retains its position as a primary reference material for the modernization of the Nigerian cooperative law and sets the path for its standardization. However, supposedly consequential development has remained elusive, hence the imperatives to build on some of the positions espoused in Oluyede’s chapter in view of current realities. Although P.A Oluyede’s contribution retains its position as a top-notch reference material, some of the positions canvassed are no longer applicable to Nigerian co-operatives, hence the need to review Nigerian cooperative law as recommended. 
- …
