145 research outputs found
Crossing potential in the production of persistent green seeds in cowpea using gt and gc genes.
Eight cowpea genotypes (Vigna unguiculata (L.) Walp.) combined in two sets of crosses were studied to evaluate parent's potential and effects of genes for green testa (gt) and green cotyledon (gc) on days to first flowering (NDF), one hundred seed.weight (SW) and dry seed yield per plant (SYP). Moreover, this study contributed to the identification of the best combinations of parents to form a population with wide genetic base for selecting tines having seeds with green color that persist to dryness..
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TSIS-1 SIM V09 Solar Spectral Irradiance
NASA’s Total and Spectral Solar Irradiance Sensor-1 (TSIS-1) operates on the International Space Station. TSIS-1 provides absolute measurements of the total solar irradiance (TSI) and spectral solar irradiance (SSI), important for accurate scientific models of climate change and solar variability. TSIS-1 is comprised of two instruments, the Total Irradiance Monitor (TIM), and the Spectral Irradiance Monitor (SIM).
This repository archives Version 9 (V09) of the TSIS-1 SIM Level 3 (L3) data release, and contains SSI in two cadences, 12-hour and 24-hour. The TSIS-1 SIM L3 V09 data release contains data from 2018-03-14 to 2022-11-11. TSIS-1 SIM data obtained between 2022-03-19 and 2022-05-19 were affected by an anomaly of the sun-pointing sensor (HFSS-B), which offset pointing by ~1 arcminute. V08 introduced a spectral correction for this period, and V09 introduced the ADDITIONAL_UNCERTAINTY column in the data release which reflects the additional irradiance uncertainty associated with the spectral correction. See the attached TSIS_SIM_V09_Release_Notes.pdf or the TSIS SIM Data Products Release Notes page (https://lasp.colorado.edu/tsis/data/ssi-data/sim-ssi-release-notes/) for further details.
Data is archived in ASCII, netCDF, and IDL SAVfile format.
Creator
Penton, Steven
Chambliss, Michael
Richard, Erik
Béland, Stéphane
Brooks, Keira
Charbonneau, Luke
Coddington, Odele
</ul
Effects of anharmonic strain on phase stability of epitaxial films and superlattices: applications to noble metals
Epitaxial strain energies of epitaxial films and bulk superlattices are
studied via first-principles total energy calculations using the local-density
approximation. Anharmonic effects due to large lattice mismatch, beyond the
reach of the harmonic elasticity theory, are found to be very important in
Cu/Au (lattice mismatch 12%), Cu/Ag (12%) and Ni/Au (15%). We find that
is the elastically soft direction for biaxial expansion of Cu and Ni, but it is
for large biaxial compression of Cu, Ag, and Au. The stability of
superlattices is discussed in terms of the coherency strain and interfacial
energies. We find that in phase-separating systems such as Cu-Ag the
superlattice formation energies decrease with superlattice period, and the
interfacial energy is positive. Superlattices are formed easiest on (001) and
hardest on (111) substrates. For ordering systems, such as Cu-Au and Ag-Au, the
formation energy of superlattices increases with period, and interfacial
energies are negative. These superlattices are formed easiest on (001) or (110)
and hardest on (111) substrates. For Ni-Au we find a hybrid behavior:
superlattices along and like in phase-separating systems, while for
they behave like in ordering systems. Finally, recent experimental
results on epitaxial stabilization of disordered Ni-Au and Cu-Ag alloys,
immiscible in the bulk form, are explained in terms of destabilization of the
phase separated state due to lattice mismatch between the substrate and
constituents.Comment: RevTeX galley format, 16 pages, includes 9 EPS figures, to appear in
Physical Review
Nutrition, mental health and violence: from pregnancy to postpartum Cohort of women attending primary care units in Southern Brazil - ECCAGE study
<p>Abstract</p> <p>Background</p> <p>Woman's nutritional status, before and during pregnancy, is a strong determinant of health outcomes in the mother and newborn. Gestational weight gain and postpartum weight retention increases risk of overweight or obesity in the future and they depend on the pregestational nutritional status and on food consumption and eating behavior during pregnancy. Eating behavior during pregnancy may be the cause or consequence of mood changes during pregnancy, especially depression, which increases likelihood of postpartum depression. In Brazil, a study carried out in the immediate postpartum period found that one in three women experienced some type of violence during pregnancy. Violence and depression are strongly associated and both exposures during pregnancy are associated with increased maternal stress and subsequent harm to the infant. The main objectives of this study are: to identify food intake and eating behaviors patterns; to estimate the prevalence of common mental disorders and the experience of violence during and after pregnancy; and to estimate the association between these exposures and infant's health and development.</p> <p>Methods/Design</p> <p>This is a cohort study of 780 pregnant women receiving care in 18 primary care units in two cities in Southern Brazil. Pregnant women were first evaluated between the 16<sup>th </sup>and 36<sup>th </sup>week of pregnancy at a prenatal visit. Follow-up included immediate postpartum assessment and around the fifth month postpartum. Information was obtained on sociodemographic characteristics, living circumstances, food intake, eating behaviors, mental health and exposure to violence, and on infant's development and anthropometrics measurements.</p> <p>Discussion</p> <p>This project will bring relevant information for a better understanding of the relationship between exposures during pregnancy and how they might affect child development, which can be useful for a better planning of health actions aiming to enhance available resources in primary health care.</p
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TSIS-1 SIM V10 Solar Spectral Irradiance
NASA’s Total and Spectral Solar Irradiance Sensor-1 (TSIS-1) operates on the International Space Station. TSIS-1 provides absolute measurements of the total solar irradiance (TSI) and spectral solar irradiance (SSI), important for accurate scientific models of climate change and solar variability. TSIS-1 is comprised of two instruments, the Total Irradiance Monitor (TIM), and the Spectral Irradiance Monitor (SIM).
This repository archives Version 10 (V10) of the TSIS-1 SIM Level 3 (L3) data release, and contains SSI in two cadences, 12-hour and 24-hour. The TSIS-1 SIM L3 V10 data release contains data from 2018-03-14 to 2023-03-06. TSIS-1 SIM data obtained between 2022-03-19 and 2022-05-19 were affected by an anomaly of the sun-pointing sensor (HFSS-B), which offset pointing by ~1 arcminute. V08 introduced a spectral correction for this period, and V09 introduced the ADDITIONAL_UNCERTAINTY column in the data release that reflects the additional irradiance uncertainty associated with the spectral correction.
The TSIS-1 SIM prism degradation rate on the primary channel has recently increased, presumably due to increased solar activity. As a result, the V10 degradation models are not fully correcting for prism degradation in recent data. The V10 L3 data release (and this archive) was been halted and truncated to March 7, 2023, since irradiance errors could exceed 0.1% (1/2 of the baseline accuracy requirement) after this date. Users should not use any previously published V10 data beyond March 7, 2023, as errors up to 0.3% were present. The V11 TSIS-1 SIM L3 data release, containing the full dataset, and mitigating the prism degradation rate issue described here, was released on August 30, 2023.
See the attached TSIS_SIM_V10_Release_Notes.pdf or the TSIS SIM Data Products Release Notes page (https://lasp.colorado.edu/tsis/data/ssi-data/sim-ssi-release-notes/) for further details, and instructions for obtaining the latest TSIS-1 SIM L3 data release.
Data is archived in ASCII, netCDF, and IDL SAVfile format.</p
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TSIS-1 SIM L3 V11 Solar Spectral Irradiance
NASA’s Total and Spectral Solar Irradiance Sensor-1 (TSIS-1) operates on the International Space Station. TSIS-1 provides absolute measurements of the total solar irradiance (TSI) and spectral solar irradiance (SSI), important for accurate scientific models of climate change and solar variability. TSIS-1 is comprised of two instruments, the Total Irradiance Monitor (TIM), and the Spectral Irradiance Monitor (SIM).
This repository archives Version 11 (V11) of the TSIS-1 SIM Level 3 (L3) data release, and contains SSI in two cadences, 12-hour and 24-hour. The TSIS-1 SIM L3 V11 data release contains data from 2018-03-14 to 2024-01-24. TSIS-1 SIM data obtained between 2022-03-19 and 2022-05-19 were affected by an anomaly of the sun-pointing sensor (HFSS-B), which offset pointing by ~1 arcminute. V08 introduced a spectral correction for this period, and V09 introduced the ADDITIONAL_UNCERTAINTY column in the data release that reflects the additional irradiance uncertainty associated with the spectral correction.
The TSIS-1 SIM prism degradation rate on the primary channel started increasing in Spring 2023, due to increased solar activity. The V11 data release is an 'off-cycle' release (not associated with a set of semi-annual Channel C scans), specifically designed to mitigate (but not fully correct) for this increased degradation. The V12 data release is designed to fully correct for any future degradation trends (partially due to the introduction of polynomials to track degradation trends instead of exponentials).
On Sept 3, 2023, the TSIS-1 SIM instrument had a lock-up of the Digital Signal Processor (DSP). Command and control of the DSP was restored on Oct 21, 2023, however, the Electrical Substition Radiometers (ESRs) showed anomalous irradiances in certain wavebands in certain configurations. As a result, no TSIS-1 SIM L3 data longward of 1620 nm is published in V11 after Oct 21, 2023. Some additional data longward of 1620 nm is present in the V12 data release, but temporal and wavelength gaps should be expected between 1620 - 2300 nm, until corrections are available in a future data release.
See the attached TSIS_SIM_V11_Release_Notes.pdf or the TSIS SIM Data Products Release Notes page (https://lasp.colorado.edu/tsis/data/ssi-data/sim-ssi-release-notes/) for further details, and instructions for obtaining the latest TSIS-1 SIM L3 data release.
Data is archived in ASCII, netCDF, and IDL SAVfile format.
The Release Notes document (TSIS_SIM_V11.1_Release_Notes.pdf) is the 2nd version (V2) of the V11 release notes.</p
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