Aiming at the common problems of high working resistance, low soil disturbance, and rates missed extraction in operation carrot combine harvesters, a high-efficiency drag-reducing bionic soil-loosening shovel was designed this study. The physical parameters carrots were measured, using badger claw toe as prototype. wing structures designed. Based on EDEM discrete element simulation technology, ...

Cement plants in the central Hudson River valley utilize limestones of the Helderbergian Series of the Lower Devonian. Chiefly calcilutites, calcarenites, and cherty calcisiltites, these rocks represent progressively deeper environments, from lagoonal to neritic, with scattered reef deposits. Stratigraphic continuity is marked, and a layer-bylayer analysis shows strikingly constant chemical com...

As the working efficiency and life span of shovel plate a roadheader directly influence its performance, optimization shovel-plate parameters is crucial. For optimizing parameters, variations in loading capacity grubbing force with respect to are determined this study. Moreover, ideal point method gray weight proposed for multiobjective optimization. The weights resistance by investigating exis...

With today 's entry I begin my ninth year oi writing columns in your school newspaper for the makers oi Marlboro Cigarettes. Nine years, I believe you will agree, is a long time. In fact, it took only a little longer than nine years to dig the Suez Canal , and you know what a gigantic under taking t h a t was! To be sure, the work would have gone more rapidly had the shovel been invented at tha...

Alloyed carbon steels used in ground engaging tools (GETs), such as shovel-teeth, can withstand high working loads, but their wear resistance is inadequate for abrasive operations the mining industry. Different approaches to engineer protective surfaces on GETs improving have been developed over years, effectiveness of applied layer has limited by maximum thickness that be realized reliably. Co...

klinefelter syndrome includes a group of chromosomal disorders with at least one  additional  x  chromosome  in  male  karyotype  (46,xy).  up  to  now, different dental manifestations such as taurodontism, congenital absence of permanent teeth, shovel incisors, occlusal anomalies and increased permanent tooth size have been reported. a case of klinefelter syndrome with very rare dental feature...

The simultaneous occurrence of various multiple dental anomalies has been reported previously, particularly in cases of chromosomal abnormalities that often manifest with multisystem involvement.' 2 Additionally, multiple dental anomalies have been reported in individuals and within families, without evidence of other systemic manifestations. Ekman-Westborg and Julin reported a case of macrodon...

Dental anomalies have been known to occur in humans due to a variety of genetic and environmental factors. Combinations of dental anomalies are known to be associated with specific syndromes. A few cases of multiple dental anomalies have been reported in patients with no generalized abnormalities. This case report describes an unusual occurrence of a combination of dental anomalies in an appare...

Triplophysa daochengensis sp. nov. is described from the Daocheng River, a northern tributary of the Jinsha River in Sichuan Province, China. The new species can be distinguished from its congeners by the following characters: body smooth and scales absent; lateral line complete; caudal peduncle compressed, depth unchanging; head length equal to caudal-peduncle length; lower jaw shovel-shaped; ...