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Two new and a known species of the genus Miconchus Andrássy, 1958 from the district South 24-Parganas, West Bengal, India are described and illustrated. Fifteen female and ten male representatives of Miconchus aquaticus Khan, Ahmad and Jairajpuri, 1978 were collected. Miconchus rectangularis n. sp. is characterized by medium sized body (female: 1.77-1.82 mm); buccal cavity very narrow, rectangular in shape, wall of buccal cavity straight; dorsal tooth and two sub-ventral teeth medium in size, situated at 31% from the base of buccal cavity and at same level; gonads amphidelphic; tail conoid, arcuate, gradually tapering at the end, tail-tip rounded, spinneret terminal. M. bulbicaudatus n. sp. is characterized by medium sized body (female: 2.1-2.2 mm); broad buccal cavity; dorsal tooth and two sub-ventral teeth small, situated at 31% from the base of buccal cavity and at same level; gonads amphidelphic; tail conoid, arcuate, gradually tapering at the end; tail-tip rounded with a bulbous structure encircled by caudal papillae at its base, spinneret terminal

Graphene is a promising material for applications as a channel in graphene field-effect transistors (GFETs) which may be used as a building block for optoelectronics, high-frequency devices and sensors. However, these devices require gate insulators which ideally should form atomically flat interfaces with graphene and at the same time contain small densities of traps to maintain high device stability. Previously used amorphous oxides, such as SiO2 and Al2O3, however, typically suffer from oxide dangling bonds at the interface, high surface roughness and numerous border oxide traps. In order to address these challenges, here we use 2 nm thick epitaxial CaF2 as a gate insulator in GFETs. By analyzing device-to-device variability for about 200 devices fabricated in two batches, we find that tens of them show similar gate transfer characteristics. Our statistical analysis of the hysteresis up to 175oC has revealed that while an ambient-sensitive counterclockwise hysteresis can be present in some devices, the dominant mechanism is thermally activated charge trapping by border defects in CaF2 which results in the conventional clockwise hysteresis. We demonstrate that both the hysteresis and bias-temperature instabilities in our GFETs with CaF2 are comparable to similar devices with SiO2 and Al2O3. In particular, we achieve a small hysteresis below 0.01 V for equivalent oxide thickness (EOT) of about 1 nm at the electric fields up to 15 MV cm−1 and sweep times in the kilosecond range. Thus, our results demonstrate that crystalline CaF2 is a promising insulator for highly-stable GFETs. [ABSTRACT FROM AUTHOR]

The Einstein-Cartan field equation of infinitely rotating rigid cylinder is obtained and solved using the techniques of Manko-Gutsunaev and Quevedo to describe gravitational field due to extended van-Stockum cylindrically perfect fluid distribution using improved energy-momentum tensor by Ray and Smalley. Key words: exact solution, Ray and Smalley energy-momentum tensor, Laplace solution. L'equation de champ d'Einstein-Cartan pour un cylindre rigide infini en rotation est obtenue et solutionnee en utilisant les techniques de Manko-Gutsunaev et de Quevedo. Nous visons ainsi a decrire le champ gravitationnel du a une distribution d'un fluide parfait de van-Stockum, cylindrique et etendu, utilisant le tenseur d'energie-impilsion ameliore de Ray et Smalley. [Traduit par la Redaction] Mots-cles : solution exacte, tenseur d'energie-impulsion de Ray et Smalley, solution de Laplace., 1. Introduction It is known that infinite cylinders are not physically realized, but cylindrical structures can be used to investigate various structure and equilibrium configurations of elementary particles as well [...]

This paper presents test results from cast-in situ reinforced concrete single and group piles subjected to strong horizontal excitation. The tests were conducted for different eccentric moments simulating different excitation levels to obtain the frequency-amplitude response of the pile. Moderate nonlinear behavior is observed in both horizontal and rocking components of vibration. The experimental results were compared with dynamic interaction factor approach using nonlinear solutions. The accuracy of the nonlinear analysis in predicting the dynamic response depends on the choice of parameters that best characterize the response of boundary zone around the pile and the realistic length of pile separation. It is shown in this study that by allowing for boundary zone and separation between pile and soil, close agreement between theoretical predictions and measured response curves can be achieved. DOI: 10.1061/(ASCE)GT.1943-5606.0000388 CE Database subject headings: Vibration; Separation; Soil-pile interactions; Dynamic response; Excitation. Author keywords: Horizontal vibration; Nonlinear vibration; Resonant amplitude; Resonant frequency; Rocking; Separation; Soil-pile interaction.

This paper presents the results of vertical vibration tests on two full-scale single piles. The diameter of pile and embedded depth were 0.45 and 22 m, respectively. The soil samples were collected from three boreholes located at the site of investigation and it was explored to a depth up to 30.45 m below the ground level. The vertical vibration tests were conducted for different eccentricities to determine the frequency-amplitude response of the pile. Static load tests were also carried out on two single piles. A simple axisymmetric two-dimensional finite-element model was developed to predict the dynamic pile response. Novak's plane strain model was also used for the prediction of the dynamic response of single pile. It was observed that the finite-element model predicted the natural frequency and peak displacement amplitude of pile reasonably well. However, prediction of dynamic response of the pile was found unsatisfactory by Novak's plane strain model. Possible reasons for unsatisfactory performance of Novak's model were investigated and presented. DOI: 10.1061/(ASCE)GT.1943-5606.0000110 CE Database subject headings: Dynamic response; Pile foundations; Natural frequency; Resonance; Layered soils; Vibration; Experimentation.

Muga silkworm (Antheraea assamensis Ww.) produces a unique golden yellow silk in North Eastern (NE) India. Nosema assamensis (Protozoa: Microsporida) cause pebrine disease in A. assamensis. Mature spore of N. assamensis appears to be elongated in shape (4.375 ± 0.051 µm x 2.681± 0.022 µm). Length/Breadth is 1.636 ± 0.025 and volume of a mature spore is 16.450 µm³. Mature spore consists of a fibrous hard coating and slight concavity in the middle are observed under SEM. The major components of the spore viz., sporoplasm, polar filament, polar cap, anterior and posterior vacuole and spore wall are observed under TEM. The polar filament runs an oblique course backward from its base at the center of the polar sac, narrowed slightly in diameter gradually up to the end and formed a coil in the peripheral layer of cytoplasm. The number of coils is 9 - 10. Extra-cellular bi-nucleated Plannont and intra-cellular bi-, tetra- and octanucleated Schizont (Meront) are observed under TEM. Life cycle includes spore and vegetative stages and it is completed in 5 - 6 to 6 - 8 days during hot and cold climate, respectively. The pathogen is very devastating in muga silkworm. Overall achievement for generation of muga seed cocoons is only 38% due to occurrence of pebrine disease in NE India. 20 - 87.5%, 10 - 37% and 78% pebrine disease has been recorded at seven P4/P3 units, P4/P3 unit at Tura/Rompara and P3 unit, Hahim during Baisakhi, Aherura and Bhodia of 2016, respectively. In this crucial situation, a strategy has been adopted. 1750 disease free layings (dfls) has been prepared at P3 unit Hahim from muga seed cocoons collected from a farmer of Arodanga village, East Garo Hills, Meghalaya and the DFLs has been brushed at six P4/P3 units during late Bhodia crop (Oct-Nov., 16). Out of this, 108914 seed (actual) cocoons has been harvested (dfl: cocoon = 1:62) and 37765 DFLs has been prepared from 94400 seed cocoons (cocoon: dfl = 2.5:1 & dfl: dfl = 1:21.6). Besides, a farmer of Rangjhuli village, Goalpara, Assam utilized the same seed cocoons from same farmer of Meghalaya and generated 45600 seed cocoons out of which 17466 dfls (cocoon:dfl = 2.6:1) were prepared at P3 unit Adokgiri. In this manner, the constraints faced for muga seed production have been resolved and the muga seed cocoons are ensured free of pebrine disease at NE states. So, this recent strategy, to utilize elite stock from forest and simultaneous discarding of the entire pebrine infected lot of seed cocoons, may be implemented for sustainable development of vanya silkworm in India. [ABSTRACT FROM AUTHOR]