Differential taxonomy of Haemogamasus nidi Michael, 1892 and H. nidiformis Bregetova, 1955 (Acari, Mesostigmata: Laelapidae)

1979 ◽  
Vol 10 (1) ◽  
pp. 73-78
Author(s):  
Lars Lundqvist ◽  
Anders Edler
Keyword(s):  
Relative Length ◽  
Type Material ◽  
Length And Area

AbstractA collection of Haemogamasus nidi Michael, 1892 and H. nidiformis Bregetova, 1955 from Scandinavia and NE USSR was compared with type material. Differences in the number of setae and the relative length and area of the genito-ventral shield can be used to seperate females of the two species.

One new species and two redescriptions of Marphysa (Eunicidae, Annelida) species of the Aenea-group from Australia

Zootaxa ◽  
2017 ◽  
Vol 4268 (3) ◽  
pp. 411 ◽  
Author(s):  
JOANA ZANOL ◽  
THAUANE DOS S. C. DA SILVA ◽  
PAT HUTCHINGS
Keyword(s):  
New Species ◽  
Intraspecific Variation ◽  
Relative Length ◽  
Type Material ◽  
Entire Body ◽  
Key To Species ◽  
Taxonomic Key ◽  
Left And Right ◽  
One New Species

Species of Marphysa belonging to the Aenea-group have compound falcigers as the subacicular chaetae along the entire body. Around 30 species belong to this group, among these, two have originally been described based on Australian specimens, M. bifurcata and M. sessilobranchiata. Here, we redescribe both species based on type and non-type material and describe a species new to science, M. pseudosessiloa n. sp., including intraspecific variation. Informative features for the identification of these species are relative length of prostomial appendages in relation to prostomium, shape of notopodial cirri, left MxIV plate, left and right MxIV attachment lamellae and placement of branchial stem. A taxonomic key to species of Marphysa currently reported from Australia is also provided.

scholarly journals Glacier change of the Columbia Icefield, Canadian Rocky Mountains, 1919–2009

2013 ◽  
Vol 59 (216) ◽  
pp. 671-686 ◽  
Author(s):  
Christina Tennant ◽  
Brian Menounos
Keyword(s):  
Volume Change ◽  
Rocky Mountains ◽  
Relative Length ◽  
Aerial Photographs ◽  
Glacier Change ◽  
Volume Loss ◽  
Canadian Rocky Mountains ◽  
Elevation Change ◽  
Glacier Changes ◽  
Length And Area

AbstractWe determined length, area, elevation and volume change of the Columbia Icefield using Interprovincial Boundary Commission Survey maps from 1919, eight sets of aerial photographs from 1948 to 1993, and satellite data from 1999 to 2009. Over the period 1919–2009, glaciers on average retreated 1150 ± 34 m and shrank by 2.4 ± 0.2 km2. Total area loss was 59.6 ± 1.2 km2 (23 ± 5%), and mean elevation change was −49 ± 25 m w.e., resulting in a total volume loss of 14.3 ± 2.0 km3 w.e. Large outlet glaciers experienced the greatest absolute ice loss, while small, detached glaciers lost the most relative length and area. Thinning rates of debris-covered ice were 30–60% lower than those for clean ice. All glacier changes were significantly correlated with each other (p < 0.01), with r values ranging from 0.54 to 0.82. Temperature is correlated with length and area change over periods lagged 1–5 years (p < 0.05), and with elevation and volume change over periods lagged 9–18 years (p < 0.05). Precipitation is correlated with glacier change over periods lagged 1–10 years (p < 0.05).

scholarly journals Discrimination of Surface Topographies Created by Two-Stage Process by Means of Multiscale Analysis

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7044
Author(s):  
Tomasz Bartkowiak ◽  
Karol Grochalski ◽  
Bartosz Gapiński ◽  
Michał Wieczorowski
Keyword(s):  
Curvature Tensor ◽  
Relative Length ◽  
Sampling Interval ◽  
Multiscale Methods ◽  
Surface Metrology ◽  
Technological Parameters ◽  
Central Wavelength ◽  
Characterization Methods ◽  
Geometrical Properties ◽  
Length And Area

The fundamental issue in surface metrology is to provide methods that can allow the establishment of correlations between measured topographies and performance or processes, or that can discriminate confidently topographies that are processed or performed differently. This article presents a set of topographies from two-staged processed steel rings, measured with a 3D contact profilometer. Data were captured individually from four different regions, namely the top, bottom, inner, and outer surfaces. The rings were manufactured by drop forging and hot rolling. Final surface texture was achieved by mass finishing with spherical ceramic media or cut wire. In this study, we compared four different multiscale methods: sliding bandpass filtering, three geometric length- and area-scale analyses, and the multiscale curvature tensor approach. In the first method, ISO standard parameters were evaluated as a function of the central wavelength and bandwidth for measured textures. In the second and third method, complexity and relative length and area were utilized. In the last, multiscale curvature tensor statistics were calculated for a range of scales from the original sampling interval to its forty-five times multiplication. These characterization parameters were then utilized to determine how confident we can discriminate (through F-test) topographies between regions of the same specimen and between topographies resulting from processing with various technological parameters. Characterization methods that focus on the geometrical properties of topographic features allowed for discrimination at the finest scales only. Bandpass filtration and basic height parameters Sa and Sq proved to confidently discriminate against all factors at all three considered bandwidths.

scholarly journals Pseudoclypeina? crnogorica Radoicic, 1972: Stratigraphic revision and taxonomic note on a little known dasycladalean alga from Montenegro

2013 ◽  
pp. 25-37
Author(s):  
Rajka Radoicic ◽  
Nicolaos Carras ◽  
Marc Conrad
Keyword(s):  
Shallow Water ◽  
Thin Section ◽  
Lower Cretaceous ◽  
Carbonate Platform ◽  
Relative Length ◽  
Second Order ◽  
Type Material ◽  
Taxonomic Note ◽  
Southern Iran ◽  
Stratigraphic Position

Pseudoclypeina? crnogorica was first described in 1972 from the Lower, Cretaceous limestone of the Njegos Mt. area, Montenegro, Dinaric Carbonate Platform. It differs from other species of the genus Pseudoclypeina by its calcification pattern, the shape and relative length of the first and second order laterals, and by the presence in the type-material (a thin section containing the holotype) of sections standing for the sterile portion of the thallus. This is why in this paper, the generic name is left in open nomenclature. On this occasion the species, whose presence is also reported from southern Iran, is re-described and better illustrated, based on material originating from other outcrops in Montenegro. The stratigraphic position is reviewed as well. Pseudoclypeina? crnogorica occurs in shallow water inner platform facies of early Neocomian age, along with Selliporella neocomiensis.

scholarly journals COTRIBUTIONS TO COCCIDOLOGY.—I

1899 ◽  
Vol 31 (2) ◽  
pp. 45-47 ◽  
Author(s):  
J. D. Tinsley
Keyword(s):  
Relative Length ◽  
Type Material ◽  
Careful Measurement ◽  
Number Of Segments

Dactylopius sorghiellus, Forbes. Syn. D. Kingii, Ckll.Dr. S. A. Forbes has kindly sent me the type material of this species, which I have examined with much interest. The material studied consisted of 4 specimens. As is usual with these subterranean forms the antennæ are quite variable, both in the number of segments and their relative length.Only two of the antennæ of the 4 specimens were 8 jointed, the others being 7-jointed, and some plainly aborted. After careful measurement and study, I conclude that the forms described by Cockerell in Science-Gossip, Feb., 1897, p. 240, as D. Kingii, must be referred to this species.

An annotated checklist of mesoplodont whale species (Cetacea, Ziphiidae) discovered during the nineteenth century

2015 ◽  
Vol 42 (2) ◽  
pp. 226-235 ◽  
Author(s):  
G. N. H. Waller
Keyword(s):  
Nineteenth Century ◽  
Additional Data ◽  
Original Description ◽  
Type Specimen ◽  
External Morphology ◽  
Type Locality ◽  
Type Material ◽  
Beaked Whale ◽  
Registration Number ◽  
Annotated Checklist

Eight species of mesoplodont whales (genus Mesoplodon Gervais, 1850) named during the nineteenth century are based on valid descriptions. A checklist with the original description and type material for each of these species is provided. Additional data given may include type locality and illustrative sources, type material holding institution and type registration number(s). The only type specimen for which a record of external morphology was published relates to the 1803 stranding of Sowerby's beaked whale (Mesoplodon bidens).

The Axis Feature: Illusionary Effects on Children's Judgments of Length

1982 ◽  
Vol 55 (3) ◽  
pp. 720-722
Author(s):  
Anat Scher
Keyword(s):  
Relative Length ◽  
The Other ◽  
Context Model ◽  
Structural Pattern ◽  
Perceptual Judgments ◽  
Length Estimation ◽  
Different Diameters

The effect of the position of lines on length estimation was investigated. 40 5-yr.-olds were asked to compare the two arms of an L-shaped figure presented inside circular frames of different diameters. For each figure one of the arms was on the axis, that is, the diameter, and the other arm was perpendicular to that axis. In making perceptual judgments about the relative length of two lines the children tended to describe the on-axis line as longer than the off-axis line. This illusion which, presumably, reflects a perceptual force induced by the characteristics of the structural pattern, supports the context model of visual anomalies.

Making Graphene-type Material via Polymerization of Porphyrin

2020 ◽  
Author(s):  
SANJIB KAR ◽  
Sruti Mondal ◽  
Kasturi Sahu ◽  
Dilruba Hasina ◽  
Tapobrata Som ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Polymeric Material ◽  
Single Layer ◽  
Type Material ◽  
Synthetic Pathway ◽  
Simple Chemical ◽  
Doped Graphene ◽  
Ring Nitrogen ◽  
2D Structure ◽  
Porphyrin Macrocycles

<p>The synthesis of new graphene-type materials (<i>via</i> polymerization of porphyrin macrocycles) through a simple chemical synthetic pathway (at RT) has been demonstrated. This newly synthesized material can be dispersed in water with an average sheet size of few microns and with single layer thickness. As the porphyrin contains four inner ring nitrogen atoms thus the presented polymeric material will be close analogous of N-doped graphene. Porphyrin as the key component to synthesize layered graphene type continuous 2D structure has never been attempted before. </p> <p> </p>

Review of Turkish crickets from the subfamily Gryllomorphinae (Orthoptera: Gryllidae)

2012 ◽  
Vol 21 (1) ◽  
pp. 28-59
Author(s):  
A.V. Gorochov ◽  
M. Ünal
Keyword(s):  
Type Material ◽  
Southern Coast ◽  
First Time

The fauna of Gryllomorphinae of Turkey is reviewed. Sixteen species and subspecies are established. Ovaliptila anamur sp. nov., O. anitli sp. nov., O. alanya sp. nov., O. alanya proxima subsp. nov., O. alara sp. nov., O. teke sp. nov., O. ibrahimi sp. nov., Glandulosa borisi sp. nov. and Gryllomorpha dalmatina minutissima subsp. nov. are described. Ovaliptila beroni (Popov, 1975), Glandulosa kinzelbachi Harz, 1979, G. harzi Gorochov, 1996 and Gryllomorpha Antalya Gorochov, 2009 are briefly characterized based on the type material. Ovaliptila buresi Mařan, 1958 is indicated as a rather widely distributed species in the western part of Anatolia (but not in the southern coast of this peninsula). Gryllomorpha dalmatina pieperi Harz, 1979, G. miramae Medvedev, 1933 and the nominotypical subspecies of G. miramae are recorded from Turkey for the first time, but both subspecies remain open to question.

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