NORTH AMERICAN GEOMETRIDÆ

1882 ◽  
Vol 14 (6) ◽  
pp. 106-111 ◽  
Author(s):  
A. R. Grote
Keyword(s):  
North American ◽  
Short Paper ◽  
Additional Information ◽  
Proper Name

I have indicated in this short paper where the types of my Geometrid species are to be found, to the best of my knowledge, and I have given such additional information as I am possessed of with regard to the species. I have followed the classification of Dr. Packard, except in a few instances where I have found reasons to prefer other names. I refer to my paper, Can. Ent., 8, 152, for a review of the synonymy of certain species. Two species, one described by Dr. Harvey (viz., Endropia Warneri), have been re-named by Dr. Packard, who calls Dr. Harvey's species Apiciaria. As to whether we must put the terminations aria and ata (accordingly as the ♂ antennæ are pectinate or not) I cannot attempt to decide. I think it is advisable to bear this rule in mind when naming species, but I would not change therefore any names already in use. Especially do I think it unadvisable to place the termination after a proper name. I should call the Endropia, E. Warneri, not E. Warneraria.

scholarly journals Spectral Tomography for 3D Element Detection and Mineral Analysis

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 598
Author(s):  
Jose R. A. Godinho ◽  
Gabriel Westaway-Heaven ◽  
Marijn A. Boone ◽  
Axel D. Renno
Keyword(s):  
Energy Spectrum ◽  
3D Imaging ◽  
X Rays ◽  
3D Images ◽  
Characterization Methods ◽  
X Ray ◽  
Additional Information ◽  
Mineral Phases ◽  
Spectral Computed Tomography

This paper demonstrates the potential of a new 3D imaging technique, Spectral Computed Tomography (sp-CT), to identify heavy elements inside materials, which can be used to classify mineral phases. The method combines the total X-ray transmission measured by a normal polychromatic X-ray detector, and the transmitted X-ray energy spectrum measured by a detector that discriminates between X-rays with energies of about 1.1 keV resolution. An analysis of the energy spectrum allows to identify sudden changes of transmission at K-edge energies that are specific of each element. The additional information about the elements in a phase improves the classification of mineral phases from grey-scale 3D images that would be otherwise difficult due to artefacts or the lack of contrast between phases. The ability to identify the elements inside the minerals that compose ore particles and rocks is crucial to broaden the application of 3D imaging in Earth sciences research and mineral process engineering, which will represent an important complement to traditional 2D imaging mineral characterization methods. In this paper, the first applications of sp-CT to classify mineral phases are showcased and the limitations and further developments are discussed.

The Aesthetic Earlobe: Classification of Lobule Ptosis on the Basis of a Survey of North American Caucasians

2003 ◽  
Vol 112 (1) ◽  
pp. 266-272 ◽  
Author(s):  
Arian Mowlavi ◽  
D. Garth Meldrum ◽  
Bradon J. Wilhelmi ◽  
Ashkan Ghavami ◽  
Elvin G. Zook
Keyword(s):  
North American ◽  
The Aesthetic

A review of Sharp's types of Aleochara from Latin America (Coleoptera: Staphylinidae)

1989 ◽  
Vol 20 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Jan Klimaszewski
Keyword(s):  
Latin America ◽  
South America ◽  
North American ◽  
Additional Information ◽  
First Time

AbstractA review of David Sharp's types of Aleochara from Mexico, and Central and South America is presented. Nineteen species are treated here, one of which is described as new (A. felixiana), seven are redescribed [A. angusticeps Sharp, A. funestior Sharp, A. mexicana Sharp, A. oxypodia Sharp, A. simulatrix Sharp, A. gracilis (Sharp), and A. duplicata (Sharp)] and one [A. miradoris Sharp] is put in synonymy under A. mexicana Sharp. The remaining ten species were treated in my 1984-revision of North American Aleochara but are here included in a checklist with references to description, redescription, and illustrations. Some additional information is provided for previously synonymized A. torquata Sharp (= A. sallaei Sharp), and for A. quadrata Sharp. Illustrations of genitalic structures of both sexes are provided for the first time for the seven redescribed species. Lectotypes are designated for A. angusticeps, A. duplicata, A. funestior, A. mexicana, and A. oxypodia.

scholarly journals Clifford algebra-based structure filtering analysis for geophysical vector fields

2013 ◽  
Vol 20 (4) ◽  
pp. 563-570 ◽  
Author(s):  
Z. Yu ◽  
W. Luo ◽  
L. Yi ◽  
Y. Hu ◽  
L. Yuan
Keyword(s):  
Vector Field ◽  
Clifford Algebra ◽  
El Niño ◽  
Vector Fields ◽  
El Nino ◽  
Field Analysis ◽  
Directional Information ◽  
Filtering Method ◽  
Additional Information

Abstract. A new Clifford algebra-based vector field filtering method, which combines amplitude similarity and direction difference synchronously, is proposed. Firstly, a modified correlation product is defined by combining the amplitude similarity and direction difference. Then, a structure filtering algorithm is constructed based on the modified correlation product. With custom template and thresholds applied to the modulus and directional fields independently, our approach can reveal not only the modulus similarities but also the classification of the angular distribution. Experiments on exploring the tempo-spatial evolution of the 2002–2003 El Niño from the global wind data field are used to test the algorithm. The results suggest that both the modulus similarity and directional information given by our approach can reveal the different stages and dominate factors of the process of the El Niño evolution. Additional information such as the directional stability of the El Niño can also be extracted. All the above suggest our method can provide a new powerful and applicable tool for geophysical vector field analysis.

scholarly journals Análisis del subsector museos y su contribución económica en México

UVserva ◽  
2020 ◽  
pp. 20-34
Author(s):  
Azminda Meybelli Román Nieto
Keyword(s):  
North American ◽  
Classification System ◽  
Growth And Development ◽  
National Account ◽  
Economy Growth ◽  
The North ◽  
Palabras Clave ◽  
Account System

El presente artículo analiza el papel de los museos en el sector de la cultura en México y su contribución económica. Para ello, se tomó como base para el análisis de los años 2016 y 2017, los resultados del Sistema Nacional de Cuentas del INEGI, (Año base 2013) y la clasificación del Sistema de Clasificación Industrial de América del Norte SCIAN (2018).Palabras clave: Sector; economía; crecimiento; cultura; museos. AbstractThis article presents the role of museums in the culture sector in Mexico and how they contribute to the growth and development of the country. For this, the results of the National Account System of INEGI, (Base Year 2013) and the classification of the North American Industrial Classification System SCIAN (2018) are taken as the basis for the analysis.Keywords: Sector; Economy; Growth; Culture; Museums.

scholarly journals Accurate classification of secondary progression in multiple sclerosis using a decision tree

2020 ◽  
pp. 135245852097532
Author(s):  
Ryan Ramanujam ◽  
Feng Zhu ◽  
Katharina Fink ◽  
Virginija Danylaitė Karrenbauer ◽  
Johannes Lorscheider ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Decision Tree ◽  
Clinical Judgment ◽  
Clinical Information ◽  
Disease Classification ◽  
Additional Information ◽  
History Of ◽  
Phenotype Transition ◽  
Independent Cohort

Background: The absence of reliable imaging or biological markers of phenotype transition in multiple sclerosis (MS) makes assignment of current phenotype status difficult. Objective: The authors sought to determine whether clinical information can be used to accurately assign current disease phenotypes. Methods: Data from the clinical visits of 14,387 MS patients in Sweden were collected. Classifying algorithms based on several demographic and clinical factors were examined. Results obtained from the best classifier when predicting neurologist recorded disease classification were replicated in an independent cohort from British Columbia and were compared to a previously published algorithm and clinical judgment of three neurologists. Results: A decision tree (the classifier) containing only most recently available expanded disability scale status score and age obtained 89.3% (95% confidence intervals (CIs): 88.8–89.8) classification accuracy, defined as concordance with the latest reported status. Validation in the independent cohort resulted in 82.0% (95% CI: 81.0–83.1) accuracy. A previously published classification algorithm with slight modifications achieved 77.8% (95% CI: 77.1–78.4) accuracy. With complete patient history of 100 patients, three neurologists obtained 84.3% accuracy compared with 85% for the classifier using the same data. Conclusion: The classifier can be used to standardize definitions of disease phenotype across different cohorts. Clinically, this model could assist neurologists by providing additional information.

A Note on Synchronized Emergence in Gomphus vastus Walsh (Odonata: Gomphidae)

1963 ◽  
Vol 95 (1) ◽  
pp. 69-69 ◽  
Author(s):  
Clifford Johnson
Keyword(s):  
North American ◽  
Adult Emergence ◽  
North American Species ◽  
Ecological Classification ◽  
General Area ◽  
River Bank ◽  
Dragonfly Species

An ecological classification of dragonfly species into spring and summer types was proposed by Corbet (1954). Much of the basis for the classification rests with the pattern and period of adult emergence. Since little information of this type is known for North American species, the following observations are reported.On May 20, 1962, I spent several hours collecting Baisaeschna janata and Didymops transversa along the New River, two miles north of McCoy, Virginia. A search was made at that time for odonate exuviae. None were found. I returned to the site at 9:30 a.m. the following day. The vegetation, tree trunks, rocks and detritus along the river were clustered with exuviae, all apparently of Gomphus vastus. Several thousand individuals must have emerged from that general area of the river. As an example of the density, 230 cast skins were counted along one 20-foot stretch of the river bank. Some individuals had transformed directly on the sand banks and others at a height of seven feet.

Sign in / Sign up

Export Citation Format

Share Document