As part of the international project entitled "African Monsoon Multidisciplinary Analysis (AMMA)", NAMMA (NASA AMMA) aimed to gain a better understanding of the relationship between the African Easterly Waves (AEWs), the Sahara Air Layer (SAL), and tropical cyclogenesis. The NAMMA airborne field campaign was based out of the Cape Verde...
The mixed electronic and ionic conductivity of perovskite oxides has enabled their use in diverse applications such as automotive exhaust catalysts, solid oxide fuel cell cathodes, and visible light photocatalysts. The redox chemistry at the surface of perovskite oxides is largely dependent on the oxidation state of the metal cations...
A highly-digital technique is proposed for excess loop delay (ELD)
compensation in multi-bit continuous-time ΔΣ modulators. A digitally
controlled reference switching matrix is used to replace the power-hungry
signal adder and extra DAC driving the quantizer, which are
commonly used in ELD compensation. With the proposed technique,
the feedback DAC...
Pleistocene drainage basin integration led to progressive excavation of
Tertiary-Quaternary sedimentary basins along the Yellow River in the northeastern Tibetan
Plateau. Cosmogenic burial dating of ancestral river deposits and basin fill from two key
watershed divides confirms a fluvial connection between basins at 0.5–1.2 Ma, prior to excavation
by the...
We have developed a coupled 3‐D pan‐Arctic biology/sea ice/ocean model to investigate the impact of declining Arctic sea ice on the marine planktonic ecosystem over 1988–2007. The biophysical model results agree with satellite observations of a generally downward trend in summer sea ice extent during 1988–2007, resulting in an increase...
A coupled biophysical model is used to examine the impact of changes in sea ice and snow cover and nutrient availability on the formation of massive under-ice phytoplankton blooms (MUPBs) in the Chukchi Sea of the Arctic Ocean over the period 1988–2013. The model is able to reproduce the basic...
A coupled biophysical model is used to examine the impact of the great Arctic cyclone
of early August 2012 on the marine planktonic ecosystem in the Pacific sector of the Arctic
Ocean (PSA). Model results indicate that the cyclone influences the marine planktonic
ecosystem by enhancing productivity on the shelves...
A new incremental ADC is proposed which extends the order of a
conventional incremental ADC from N to (2N-1) by way of a two-step
operation. For a given conversion time, the duration of each step can be
optimized. For an Nth-order IADC, the performance is equivalent to that
of a...
In this letter, a simple and highly efficient successive-approximation
Registers (SAR) ADC realization is proposed. It requires an op-amp,
a comparator and only three equal-valued capacitors. The proposed
scheme is insensitive to the capacitor parasitics, and has a small
capacitance spread. With an oversampled scheme, it also allows
noise-shaping the...
Designing tensor fields in the plane and on surfaces
is a necessary task in many graphics applications, such as
painterly rendering, pen-and-ink sketch of smooth surfaces, and
anisotropic remeshing. In this paper, we present an interactive
design system that allows a user to create a wide variety of
surface tensor...
Emerging application areas such as air pollution in megacities, wind energy, urban security, and operation of unmanned aerial vehicles have intensified scientific and societal interest in mountain meteorology. To address scientific needs and help improve the prediction of mountain weather, the U.S. Department of Defense has funded a research effort—the...
The workshop was funded by the National Science Foundation (NSF), OCE Division of Ocean Sciences (Award # 1817257). This report summarizes the key findings, outcomes, and recommendations of the workshop and serves as a draft of the comprehensive roadmap.
Wave energy converter research continues to advance and new developers are continuing to emerge, leading to the need for a general modeling methodology. This work attempts to outline the design methodology necessary to perform frequency domain analysis on a generic wave energy converter. A two-body point absorber representing a generic...
Rapamycin was found to increase (11% to 16%) the lifespan of male and female C57BL/6J mice most likely by reducing the
increase in the hazard for mortality (i.e., the rate of aging) term in the Gompertz mortality analysis. To identify the pathways
that could be responsible for rapamycin’s longevity effect,...
Full Text:
Associated with
Major Changes in the Liver Transcriptome
Fok WC, Chen Y, Bokov A, Zhang Y, Salmon AB, et al
Rapamycin was found to increase (11% to 16%) the lifespan of male and female C57BL/6J mice most likely by reducing the
increase in the hazard for mortality (i.e., the rate of aging) term in the Gompertz mortality analysis. To identify the pathways
that could be responsible for rapamycin’s longevity effect,...
Rapamycin (Rapa) and dietary restriction (DR) have consistently
been shown to increase lifespan. To investigate whether Rapa
and DR affect similar pathways in mice, we compared the effects
of feeding mice ad libitum (AL), Rapa, DR, or a combination of
Rapa and DR (Rapa + DR) on the transcriptome and...
Full Text:
, A., Gelfond, J., Yu, Z., Zhang, Y., Doderer, M., Chen, Y.,
Javors, M., Wood, W. H., Zhang, Y
Rapamycin (Rapa) and dietary restriction (DR) have consistently
been shown to increase lifespan. To investigate whether Rapa
and DR affect similar pathways in mice, we compared the effects
of feeding mice ad libitum (AL), Rapa, DR, or a combination of
Rapa and DR (Rapa + DR) on the transcriptome and...
Rapamycin (Rapa) and dietary restriction (DR) have consistently
been shown to increase lifespan. To investigate whether Rapa
and DR affect similar pathways in mice, we compared the effects
of feeding mice ad libitum (AL), Rapa, DR, or a combination of
Rapa and DR (Rapa + DR) on the transcriptome and...
Rapamycin was found to increase (11% to 16%) the lifespan of male and female C57BL/6J mice most likely by reducing the increase in the hazard for mortality (i.e., the rate of aging) term in the Gompertz mortality analysis. To identify the pathways that could be responsible for rapamycin's longevity effect,...
The early Pliocene warm phase was characterized by high sea surface temperatures and a deep thermocline in the eastern equatorial Pacific. A new hypothesis suggests that the progressive closure of the Panamanian seaway contributed substantially to the termination of this zonally symmetric state in the equatorial Pacific. According to this...