scholarly journals A COMMON SOURCE OF DIFFICULTY IN HIGH-RESOLUTION RADIOAUTOGRAPHY

1969 ◽  
Vol 41 (3) ◽  
pp. 918-919 ◽  
Author(s):  
Lucien G. Caro
Keyword(s):  
High Resolution ◽  
Common Source

High-Swing, High-Resolution, Low-Power, Low-Area Voltage-Mode LTA/WTA Circuits

2015 ◽  
Vol 24 (07) ◽  
pp. 1550103 ◽  
Author(s):  
Mohammad Soleimani ◽  
Siroos Toofan ◽  
Mostafa Yargholi
Keyword(s):  
High Resolution ◽  
Low Power ◽  
Power Dissipation ◽  
Supply Voltage ◽  
Rank Order ◽  
Active Area ◽  
Total Power ◽  
Common Source ◽  
Cmos Process ◽  
Process Technology

In this paper, a general architecture for analog implementation of loser/winner-take-all (LTA/WTA) and other rank order circuits is presented. This architecture is composed of a differential amplifier with merged n-inputs and a merged common-source with active load (MCSAL) circuit to choose the desired input. The advantages of the proposed structure are simplicity, very high resolution, very low supply voltage requirements, very low output resistor, low power dissipation, low active area and simple expansion for multiple inputs by adding only three transistors for each extra input. The post-layout simulation results of proposed circuits are presented by HSPICE software in 0.35-μm CMOS process technology. The total power dissipation of proposed circuits is about 110-μW. Also, the total active area is about 550-μm2 for five-input proposed circuits, and would be negligibly increased for each extra input.

UNRAVELING THE MYSTERY OF NATURAL RUBBER BIOSYNTHESIS. PART II: COMPOSITION AND GROWTH OF IN VITRO NATURAL RUBBER USING HIGH-RESOLUTION SIZE EXCLUSION CHROMATOGRAPHY

2014 ◽  
Vol 87 (3) ◽  
pp. 451-458 ◽  
Author(s):  
Cheng Ching K. Chiang ◽  
Balaka Barkakaty ◽  
Judit E. Puskas ◽  
Wenshuang Xie ◽  
Katrina Cornish ◽  
...  
Keyword(s):  
High Resolution ◽  
Natural Rubber ◽  
Size Exclusion Chromatography ◽  
Rubber Tree ◽  
Size Exclusion ◽  
Common Source ◽  
Rubber Biosynthesis ◽  
Flight Mass Spectrometry ◽  
Exclusion Chromatography

ABSTRACT The superior properties of natural rubber (cis-1,4-polyisoprene [NR]) are a function of its structure and composition, properties that still remain a mystery and that are irreplaceable by any synthetic rubber. NR from guayule (Parthenium argentatum) has been gaining special interest for its hypoallergenic properties while maintaining superior mechanical properties that are commonly associated with the Brazilian rubber tree (Hevea brasiliensis), the most common source of NR. Techniques exist to isolate washed rubber particles (WRPs) that contain enzymatically active rubber transferase, to study NR biosynthesis, and previous work on the in vitro NR growth in Hevea has demonstrated the presence of around 50 wt% of a low molecular weight ([MW], Mn <10 000 g/mol) fraction. Structural and compositional analyses of this low MW fraction in Hevea are challenging due to the high protein content. We discuss the analysis and composition of guayule latex and WRPs using high-resolution Size Exclusion Chromatography. We also discuss the composition of the soluble fraction of inactive guayule latex using matrix-assisted laser desorption ionization/time of flight mass spectrometry.

scholarly journals Some Results of Digital (in situ) Monitoring of Atmospheric Pollution with Gaseous Impurities in the Central Ecological Zone of South Baikal

2020 ◽  
Vol 34 ◽  
pp. 141-155
Author(s):  
T. V. Khodzher ◽  
◽  
V. A. Obolkin ◽  
E. V. Molozhnikova ◽  
M. Yu. Shikhovtsev ◽  
...  
Keyword(s):  
High Resolution ◽  
Lake Baikal ◽  
Atmospheric Pollution ◽  
Temporal Variability ◽  
Thermal Power ◽  
In Situ Monitoring ◽  
Common Source ◽  
Ecological Zone ◽  
Synoptic Conditions ◽  
South Baikal

The article presents the results of continuous automatic monitoring of atmospheric transport of pollutants in the source area of the Angara river (South Baikal) at the "Listvyanka" atmospheric monitoring station in 2019-2020. The temporal variability of the concentrations of oxides of sulfur, nitrogen, and mercury in the atmosphere of the сentral ecological zone of the lake Baikal is analyzed with high resolution from minutes to days. The use of automatic high-resolution gas analyzers for atmospheric impurities and meteorological parameters allows real-time monitoring of the flow of atmospheric pollution into the сentral ecological zone of South Baikal. Depending on the meteorological and synoptic conditions, observations demonstrate a high variability in the concentrations of anthropogenic impurities in the atmosphere over South Baikal. It is shown that the most severe atmospheric pollution occurs during the transfer of air masses from the north-northwest in winter. When transported from the South Baikal, atmospheric pollution is minimal. The temporal variability of the concentrations of the studied impurities occurs synchronously, which indicates their common source of origin – the combustion of fossil fuel. The highest time fluctuations are determined for the concentrations of sulfur and nitrogen oxides, the fluctuations in mercury concentrations are less significant. The average (median) and maximum (one-time) concentrations of sulfur oxides at "Listvyanka" station are given, depending on the prevailing wind directions. Direct trajectories of air mass transfer from the source cities of the Irkutsk region (Irkutsk, Angarsk, Shelekhov) are presented. At the time of the increase in the concentration of gas impurities at the "Listvyanka" station, pollution was transferred from the industrial complexes of the Baikal region. In the conclusion of the article, it is concluded that there are two main mechanisms of atmospheric pollution in the central ecological zone of Lake Baikal: direct transfer of individual weakly scattered plumes of separate regional thermal power plants with jet air currents at the upper boundary of the night boundary layers of the atmosphere (from 200 to 500 m above ground level); large-scale northwestern transport of mixed emissions from many regional and remote sources under the influence of synoptic-scale processes. Small settlements located on the coast, due to small volumes of emissions, do not make a significant contribution to the pollution of the lake's atmosphere. The work was supported by the Ministry of Science and Higher Education of the Russian Federation (grant No. 075-15-2020-787 for implementation of large scientific project "Fundamentals, methods and technologies for digital monitoring and forecasting of the environmental situation on the Baikal natural territory".

scholarly journals Analysis of the epidemiological dynamics during the 1982–1983 epidemic of foot-and-mouth disease in Denmark based on molecular high-resolution strain identification

2005 ◽  
Vol 86 (9) ◽  
pp. 2577-2584 ◽  
Author(s):  
Laurids S. Christensen ◽  
Preben Normann ◽  
Søren Thykier-Nielsen ◽  
Jens H. Sørensen ◽  
Karin de Stricker ◽  
...  
Keyword(s):  
High Resolution ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Strain Identification ◽  
Common Source ◽  
Sequence Information ◽  
Coding Regions ◽  
Mouth Disease Virus ◽  
Foot And Mouth ◽  
Epidemiological Information

An epidemic of foot-and-mouth disease (FMD) causing a total of 23 cases in 1982–1983, primarily on the island of Funen, Denmark, was subjected to molecular epidemiological investigations. In an attempt to exploit the quasi-species nature of foot-and-mouth disease virus strains for molecular high-resolution strain identification in order to analyse the dynamics of this epidemic, full-length VP1 coding regions were sequenced for 17 isolates collected at different farms during the epidemic. The sequence information together with epidemiological information gathered during the epidemic suggests that the epidemic was caused by at least three introductions across Danish borders and one case of airborne transmission between two islands in Denmark over a distance of 70 km. The assortment of nucleotide markers among the three strains is indicative of common recombination events in their evolutionary history, and the prerequisite of co- or superinfection of animals with variant strains in turn implies that they have a common source or epidemiologically related sources originating from an area with endemic FMD.

Observations of the spatial structure of interstellar hydrogen

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles
Keyword(s):  
High Resolution ◽  
Spatial Structure ◽  
Velocity Dispersion ◽  
Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

Combining integrated systems-biology approaches with intervention-based experimental design provides a higher-resolution path forward for microbiome research

2019 ◽  
Vol 42 ◽  
Author(s):  
J. Alfredo Blakeley-Ruiz ◽  
Carlee S. McClintock ◽  
Ralph Lydic ◽  
Helen A. Baghdoyan ◽  
James J. Choo ◽  
...  
Keyword(s):  
Systems Biology ◽  
High Resolution ◽  
Experimental Design ◽  
Integrated Systems ◽  
Microbiome Research ◽  
Constructive Criticism

Abstract The Hooks et al. review of microbiota-gut-brain (MGB) literature provides a constructive criticism of the general approaches encompassing MGB research. This commentary extends their review by: (a) highlighting capabilities of advanced systems-biology “-omics” techniques for microbiome research and (b) recommending that combining these high-resolution techniques with intervention-based experimental design may be the path forward for future MGB research.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

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