scholarly journals DESCRIPTIONS OF FOUR NEW WEST AFRICAN BUTTERFLIES

1893 ◽  
Vol 25 (1) ◽  
pp. 1-3
Author(s):  
W. J. Holland
Keyword(s):  
Broad Band ◽  
Wide Band ◽  
West African ◽  
Outer Margin ◽  
Ground Colour ◽  
New West ◽  
Transverse Line

1. E. castanea, sp. nov.♂. The form of the wings is exactly like that of Senegalensis, H. S. Upperside.—The ground colour is rich chestnut-brown, marked by broad black series of spots and bands. Upon the primaries these markings are as follows:-In the cell a longtiudinal basal streak, a transverse line, a figure 8, a twice curved transverse line, and a broad bar at the end of the cell constricted in the middle; below the cell there is a short basal band curving inwardly; beyond the cell there is a wide band running from the costa toward the outer margin as far as the lower radial; and then abruptly turning and extending to the middle of the inner margin; beyond this is a broad band of diffuse spots, wide on the costa, narrower beyond the end of the cell, and gradually widening as it apporaches the inner margin; beyond this is a submarginal series of very black round spots.

85. A New West African Alphabet: Used by the Toma, French Guinea and Liberia

Man ◽  
1943 ◽  
Vol 43 ◽  
pp. 108 ◽  
Author(s):  
Theodore Monod
Keyword(s):  
West African ◽  
New West

scholarly journals Some new West African species of Anopheles (sensu lato), with notes on nomenclature

1911 ◽  
Vol 2 (2) ◽  
pp. 141-143 ◽  
Author(s):  
F. W. Edwards
Keyword(s):  
New Species ◽  
Natural History ◽  
West Africa ◽  
West African ◽  
Tropical Medicine ◽  
London School ◽  
African Species ◽  
New West

In describing the following new species from West Africa, some words of explanation are needed as to the generic names used. In the first place, it is necessary to say that the writer follows Messrs. Dyar and Knab in considering that most of the genera into which Meigen's genus Anopheles has recently been split up are not genera in any accepted sense, and should sink under the old name Anopheles. Provisionally, however, Stethomyia, Chagasia, Calvertina and Bironella are considered as distinct; as none of these genera are African, this will not affect the present paper. Lieut.-Col. A. Alcock, of the London School of Tropical Medicine, has kindly allowed me to see the manuscript of a paper on the classification of Anopheles, which he is about to publish in the Annals and Magazine of Natural History, and I have been able to concur entirely with his views; he recognises only five sub-genera of Anopheles, the sub-genus Nyssorhynchus including all those species with flat scales on thorax and abdomen, i.e., the genera Nyssorhynchus, Cellia and Neocellia of Theobald's Monograph.

A New Broad Band 2D Antenna for Ultra-Wide-Band Applications

2005 ◽  
pp. 377-384 ◽  
Author(s):  
V. Mallepeyre ◽  
Y. Imbs ◽  
F. Gallais ◽  
J. Andrieu ◽  
B. Beillard ◽  
...  
Keyword(s):  
Broad Band ◽  
Wide Band ◽  
Ultra Wide Band

Design Analysis of Inductorless Active Loaded Low Power UWB LNA Using Noise Cancellation Technique

Frequenz ◽  
2020 ◽  
Vol 74 (3-4) ◽  
pp. 137-144 ◽  
Author(s):  
Dheeraj Kalra ◽  
Manish Kumar ◽  
Aasheesh Shukla ◽  
Laxman Singh ◽  
Zainul Abdin Jaffery
Keyword(s):  
Low Power ◽  
Noise Figure ◽  
Broad Band ◽  
Wide Band ◽  
Cmos Technology ◽  
Noise Cancellation ◽  
Low Noise ◽  
Design Analysis ◽  
Common Source ◽  
Power Gain

AbstractThis paper includes a design analysis of an inductorless low-power (LP) low-noise amplifier (LNA) with active load for Ultra Wide Band (UWB) applications. The proposed LNA consists of two parallel paths, one is the common source (CS) path and second is the CG path. The CG path has the edge advantage of improving overall Noise figure (NF) due to wide band impedance matching in UWB, while the CS path provides high power gain. A method for noise cancellation is adopted, to reduce the noise of CS path with the help of CG path. The proposed LNA successfully simulated in 90 nm CMOS technology. The results of proposed work indicate optimization at frequency 5.70 GHz with 3 dB bandwidth of 4.3 GHz–8.9 GHz. All simulations have been done for a range of frequency 03 GHz–13 GHz in Cadence virtuoso software. The results quoted 1.15 dB NF, −18.12 dB S11, 13.7 dB S21, maximum operating power gain (GP) 11.756 dB at frequency 5.7 GHz and available power gain (GA) is 10.17 dB at frequency 8.61 GHz, with 0.6 V, 0.92 mW broad band LNA.

LVI.—New West African Curculionidæ (Col.)

1948 ◽  
Vol 1 (12) ◽  
pp. 837-851
Author(s):  
Guy A.K. Marshall
Keyword(s):  
West African ◽  
New West

ON-CHIP INDUCTORS OPTIMIZATION FOR ULTRA WIDE BAND LOW NOISE AMPLIFIERS

2011 ◽  
Vol 20 (07) ◽  
pp. 1231-1242 ◽  
Author(s):  
J. DEL PINO ◽  
SUNIL L. KHEMCHANDANI ◽  
ROBERTO DÍAZ-ORTEGA ◽  
R. PULIDO ◽  
H. GARCÍA-VÁZQUEZ
Keyword(s):  
Quality Factor ◽  
Noise Figure ◽  
Impedance Matching ◽  
Broad Band ◽  
Wide Band ◽  
Design Guidelines ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Integrated Inductor ◽  
On Chip

In this work, the influence of the inductor quality factor in wide band low noise amplifiers has been studied. Electromagnetic simulations have been used to model the integrated inductor broad band response. The influence of the quality factor on LNA performance of the inductors that compound the impedance matching networks, inductive degeneration and broadband load has been studied, obtaining design guidelines for optimizing the amplifier gain flatness. Using this guidelines, an LNA with wideband input matching, shunt-peaking load, and an output buffer was designed. Using Austria Mikro Systems BiCMOS 0.35 m process, a prototype has been fabricated achieving the following measured specifications: maximum gain of 12.5 dB at 3.4 GHz with a -3 dB bandwidth of 1.7–5.3 GHz, noise figure from 4.3 to 5.2 dB, and unity gain at 9.4 GHz.

scholarly journals NORTH AMERICAN TORTRICIDÆ

1905 ◽  
Vol 37 (12) ◽  
pp. 399-400
Author(s):  
C. H. Fernald
Keyword(s):  
North American ◽  
Outer Margin ◽  
Ground Colour ◽  
Basal Segment ◽  
Dorsal Portion ◽  
Outer Half

Eucosma Pergandeana, n. sp.— Expanse of wings, 16–20 mm. Head, palpi except a touch of fuscous on the outside, basal segment of the antennæ, whitel flagellum of antennæ fuscous, annulate with white. Thorax varying from white to pale straw colour.Ground colour of fore wings white or pale cream colour; the outer half of the costa with about eight oblique fuscous lines, which are lost in the fuscous dorsal portion of the wing. The remaining portion of the wing is streaked longitudinally with fuscous, but so diffuse as to render the lines very indistinct, and the surface behind and beyond the cell is nearly unifromly pale grayish fuscous in some specimens; the ocelloid patch near the anal angle is represented by fragments of three fine blackish lines, more or less obliterated and broken by a short vertical bar of more of les distinct metallic pale gray scales; a similar one beyond follows the outer margin and joins the first below, but is broken near the middle of its course.

New West African Literature

1980 ◽  
Vol 54 (4) ◽  
pp. 685
Author(s):  
Randall Davenport ◽  
Kolawole Ogungbesan
Keyword(s):  
African Literature ◽  
West African ◽  
New West
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