Avances hacia una mecatrónica segura en tractor y máquinas agrícolas

En el artículo se presenta un algoritmo para la definición de las trayectorias a seguir en la recogida de pacas. El método propuesto supone ahorros en torno al 35% frente al procedimiento que habitualmente se ha venido utilizando.

Mérode Altarpiece, right wing, Joseph: detail

Robert Campin, workshop of; oil on oak

Encyclopédie méthodique : Histoire naturelle des animaux ...

T. 1: Histoire naturelle des animaux (Contiene : Introduction a l'histoire naturelle par. M. Daubenton; Les animaux quadrupedes et les cetaces ; Ornitologie, par M. Mauduyt ; Discours genaraux sur la nature des oiseaux [y la primera parte del Dictionnaire d'Ornithologie] (viii, lxxxxii, 691 p., [1] en bl.) -- T. 2: Oiseaux (Contiene : Dictionnaire d'ornithologie; Les animaux quadrupedes, ovipares, et les serpents par M. Daubenton ([4], 712 p.) -- T. 3: Les poissons ([4], lx, 435 p., [1] en bl.) -- T. 4-8: Insectes / par M. Olivier ([4], ccclxxiij, [3] en bl., 331, [1] en bl. ; [4], 793, [1] en bl. ; [4], 704 ; [4], 827, [1] en bl. ; [4], 722 p.; contiene tambien "Discours préliminaire et plan du dictionnaire des insectes / par M. Mauduyt" (cclxxxviii p.)) -- T. 9-10: Entomologie, ou histoire naturelle des crustaces, des arachnides et des insectes / par M. Latreille ... et m. Godart ; [Le Peletier de Saint-Fargeau, Serville et Guerin] ([4], 828 ; [6], 832, [2] p.)

Histoire du Consulat et de l'Empire : faisant suite a l'histoire de la Révolution Française /

Tomo 20 en Paris : Lheureux et cie.

The application of knowledge based expert systems to mechanical engineering design

Investigation of the different approaches used by Expert Systems researchers to solve problems in the domain of Mechanical Design and Expert Systems was carried out. The techniques used for conventional formal logic programming were compared with those used when applying Expert Systems concepts. A literature survey of design processes was also conducted with a view to adopting a suitable model of the design process. A model, comprising a variation on two established ones, was developed and applied to a problem within what are described as class 3 design tasks. The research explored the application of these concepts to Mechanical Engineering Design problems and their implementation on a microcomputer using an Expert System building tool. It was necessary to explore the use of Expert Systems in this manner so as to bridge the gap between their use as a control structure and for detailed analytical design. The former application is well researched into and this thesis discusses the latter. Some Expert System building tools available to the author at the beginning of his work were evaluated specifically for their suitability for Mechanical Engineering design problems. Microsynics was found to be the most suitable on which to implement a design problem because of its simple but powerful Semantic Net Knowledge Representation structure and the ability to use other types of representation schemes. Two major implementations were carried out. The first involved a design program for a Helical compression spring and the second a gearpair system design. Two concepts were proposed in the thesis for the modelling and implementation of design systems involving many equations. The method proposed enables equation manipulation and analysis using a combination of frames, semantic nets and production rules. The use of semantic nets for purposes other than for psychology and natural language interpretation, is quite new and represents one of the major contributions to knowledge by the author. The development of a purpose built shell program for this type of design problems was recommended as an extension of the research. Microsynics may usefully be used as a platform for this development.

Microbial community composition and bacterioplankton at time series station Helgoland Roads, North Sea

A process of global importance in carbon cycling is the remineralization of algae biomass by heterotrophic bacteria, most notably during massive marine algae blooms. Such blooms can trigger secondary blooms of planktonic bacteria that consist of swift successions of distinct bacterial clades, most prominently members of the Flavobacteriia, Gammaproteobacteria and the alphaproteobacterial Roseobacter clade. This study explores such successions during spring phytoplankton blooms in the southern North Sea (German Bight) for four consecutive years. The surface water samples were taken at Helgoland Island about 40 km offshore in the southeastern North Sea in the German Bight at the station 'Kabeltonne' (54° 11.3' N, 7° 54.0' E) between the main island and the minor island, Düne (German for 'dune') using small research vessels (http://www.awi.de/en/expedition/ships/more-ships.html). Water depths at this site fluctuate from 6 to 10 m over the tidal cycle. Samples were processed as described previously (Teeling et al., 2012; doi:10.7554/eLife.11888.001) in the laboratory of the Biological Station Helgoland within less than two hours after sampling. Assessment of absolute cell numbers and bacterioplankton community composition was carried out as described previously (Thiele et al., 2011; doi:10.1016/B978-0-444-53199-5.00056-7). To obtain total cell numbers, DNA of formaldehyde fixed cells filtered on 0.2 mm pore sized filters was stained with 4',6-diamidino-2-phenylindole (DAPI). Fluorescently labeled cells were subsequently counted on filter sections using an epifluores-cence microscope. Likewise, bacterioplankton community composition was assessed by catalyzedreporter deposition fluorescence in situ hybridization (CARD-FISH) of formaldehyde fixed cells on 0.2 mm pore sized filters.