The state of the ecosystems in the central Barents Region: scale, factors and mechanism of disturbance

1997 ◽  
Vol 206 (2-3) ◽  
pp. 203-225 ◽  
Author(s):  
G Kashulina
1997 ◽  
Vol 206 (2-3) ◽  
pp. 203-225 ◽  
Author(s):  
G KASHULINA ◽  
C REIMANN ◽  
T FINNE ◽  
J HALLERAKER ◽  
M AYRAS ◽  
...  

2017 ◽  
pp. 73
Author(s):  
María Elena Medina-Abreo ◽  
Gonzalo Castillo-Campos

A study of the flora and vegetation of the Barranca de Acazónica, located in the central part of the state of Veracruz, was under taken. The vegetation recognized for the region includes tropical deciduos forest, tropical semideciduos forest, riparian vegetation and secondary vegetation. A description of each vegetation type is given, with a brief discussion of environmental characteristics of the zone. A vegetation map of the region (scale 1:70000) is presented, with a schematic vegetation profile. About 840 species are reported in a floristic checklist, representing 126 families of vascular plants.


Author(s):  
T. A. Welton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.


1980 ◽  
Vol 11 (2) ◽  
pp. 85-94 ◽  
Author(s):  
Jack Damico ◽  
John W. Oller

Two methods of identifying language disordered children are examined. Traditional approaches require attention to relatively superficial morphological and surface syntactic criteria, such as, noun-verb agreement, tense marking, pluralization. More recently, however, language testers and others have turned to pragmatic criteria focussing on deeper aspects of meaning and communicative effectiveness, such as, general fluency, topic maintenance, specificity of referring terms. In this study, 54 regular K-5 teachers in two Albuquerque schools serving 1212 children were assigned on a roughly matched basis to one of two groups. Group S received in-service training using traditional surface criteria for referrals, while Group P received similar in-service training with pragmatic criteria. All referrals from both groups were reevaluated by a panel of judges following the state determined procedures for assignment to remedial programs. Teachers who were taught to use pragmatic criteria in identifying language disordered children identified significantly more children and were more often correct in their identification than teachers taught to use syntactic criteria. Both groups identified significantly fewer children as the grade level increased.


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