To systematically perform a meta-analysis of the scientific literature to determine whether the outcomes of endurance training based on heart rate variability (HRV) are more favorable than those of ...predefined training.
Systematic review and meta-analysis.
PubMed and Web of Science were searched systematically in March of 2020 using keywords related to endurance, the ANS, and training. To compare the outcomes of HRV-guided and predefined training, Hedges' g effect size and associated 95% confidence intervals were calculated.
A total of 8 studies (198 participants) were identified comprising 9 interventions involving a variety of approaches. Compared to predefined training, most HRV-guided interventions included fewer moderate- and/or high-intensity training sessions. Fixed effects meta-analysis revealed a significant medium-sized positive effect of HRV-guided training on submaximal physiological parameters (g = 0.296, 95% CI 0.031 to 0.562, p = 0.028), but its effects on performance (g = 0.079, 95% CI −0.050 to 0.393, p = 0.597) and V̇O2peak (g = 0.171, 95% CI −0.213 to 0.371, p = 0.130) were small and not statistically significant. Moreover, with regards to performance, HRV-guided training was associated with fewer non-responders and more positive responders.
In comparison to predefined training, HRV-guided endurance training had a medium-sized effect on submaximal physiological parameters, but only a small and non-significant influence on performance and V̇O2peak. There were fewer non-responders regarding performance with HRV-based training.
•Compared to predefined training, HRV guided training has a small and non-sign. influence on performance and max. oxygen uptake•Regarding performance, HRV guided training is associated with fewer individuals who respond negatively and more who benefit•Compared to predefined training, HRV guided training has a sig. medium positive impact on submaximal physiological parameters
A method is proposed to measure the photon polarisation parameter
λ
γ
in
b
→
s
γ
transitions using an amplitude analysis of
B
→
K
π
π
γ
decays. Simplified models of the
K
π
π
system are used to ...simulate
B
+
→
K
+
π
-
π
+
γ
and
B
0
→
K
+
π
-
π
0
γ
decays, validate the amplitude analysis method, and demonstrate the feasibility of a measurement of the
λ
γ
parameter irrespective of the model parameters. Similar sensitivities to
λ
γ
are obtained with both the charged and neutral hadronic systems. In the absence of any background and distortion due to experimental effects, the statistical uncertainty expected from an analysis of
B
+
→
K
+
π
-
π
+
γ
decays in an LHCb data set corresponding to an integrated luminosity of 9
fb
-
1
is estimated to be 0.009. A similar measurement using
B
0
→
K
+
π
-
π
0
γ
decays in a Belle II data sample corresponding to an integrated luminosity of 5
ab
-
1
would lead to a statistical uncertainty of 0.018.
Physics achievements from the Belle experiment Brodzicka, J.; Browder, T.; Chang, P. ...
Progress of theoretical and experimental physics,
12/2012, Letnik:
2012, Številka:
1
Journal Article
•Passivation of multicrystalline silicon obtained using pulsed laser deposited PbS nanoparticles.•Optimization of both the optical and electronic properties of the multicrystalline silicon substrate ...through the variation of the PbS nanoparticles sizes.•Improvement of the minority carrier lifetime due to the passivation by the PbS nanoparticles (ie., 430 μs versus 40 μs for the bare porous silicon and 2.2 μs for the bare multicrystalline silicon).
We report on the use of pulsed laser deposition (PLD) of PbS nanoparticles (PbS-NPs) on porous silicon layers in order to passivate multicrystalline silicon (mc-Si) substrates intended for solar cells applications. The porous silicon (PS) layer was first obtained through the electrochemical anodization of the mc-Si substrate, and then the PLD technique was used to decorate the PS layer by PbS-NPs at room temperature. By varying the number of laser ablation pulses (NLP) from 50 to 1200, the average size of the PbS-NPs was varied from ~2 nm to ~10 nm. The X-ray diffraction analysis has confirmed the crystalline quality of the PbS-NPs, whereas the transmission electron microscopy observations showed the uniform decoration of the PS by the PbS-NPs. By combining different characterization techniques, we were able to identify NLP = 200 as the optimal decoration condition that leads to the best passivation, in terms of the lowest surface reflectivity (of 15% at 500 nm wavelength), the highest PL intensity of the PS layer (centered around 633 nm) and the longest minority carrier lifetime (as long as ~430 µs versus 40 µs for the bare treated PS layer and 2.2 µs for the untreated bare mc-Si).
Abstract A method is proposed to measure the photon polarisation parameter $$\lambda _{\gamma }$$ λγ in $${{b}} \!\rightarrow {s} {\gamma } $$ b→sγ transitions using an amplitude analysis of ...$$B\!\rightarrow K\pi \pi {\gamma } $$ B→Kππγ decays. Simplified models of the $${K} {\pi } {\pi } $$ Kππ system are used to simulate $${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $$ B+→K+π-π+γ and $${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $$ B0→K+π-π0γ decays, validate the amplitude analysis method, and demonstrate the feasibility of a measurement of the $$\lambda _{\gamma }$$ λγ parameter irrespective of the model parameters. Similar sensitivities to $$\lambda _{\gamma }$$ λγ are obtained with both the charged and neutral hadronic systems. In the absence of any background and distortion due to experimental effects, the statistical uncertainty expected from an analysis of $${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $$ B+→K+π-π+γ decays in an LHCb data set corresponding to an integrated luminosity of 9 $$\,\hbox {fb}^{-1}$$ fb-1 is estimated to be 0.009. A similar measurement using $${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $$ B0→K+π-π0γ decays in a Belle II data sample corresponding to an integrated luminosity of 5 $$\hbox {\,ab}^{-1}$$ ab-1 would lead to a statistical uncertainty of 0.018.
A method is proposed to measure the photon polarisation parameter $\lambda _{\gamma }$ in ${{b}} \!\rightarrow {s} {\gamma } $ transitions using an amplitude analysis of $B\!\rightarrow K\pi \pi ...{\gamma } $ decays. Simplified models of the ${K} {\pi } {\pi } $ system are used to simulate ${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $ and ${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $ decays, validate the amplitude analysis method, and demonstrate the feasibility of a measurement of the $\lambda _{\gamma }$ parameter irrespective of the model parameters. Similar sensitivities to $\lambda _{\gamma }$ are obtained with both the charged and neutral hadronic systems. In the absence of any background and distortion due to experimental effects, the statistical uncertainty expected from an analysis of ${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $ decays in an LHCb data set corresponding to an integrated luminosity of 9 $\,\hbox {fb}^{-1}$ is estimated to be 0.009. A similar measurement using ${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $ decays in a Belle II data sample corresponding to an integrated luminosity of 5 $\hbox {\,ab}^{-1}$ would lead to a statistical uncertainty of 0.018.
Over the last few years great progress has been made in the technological development of Monolithic Active Pixel Sensors (MAPS) such that upgrades to existing vertex detectors using this technology ...are now actively being considered. Future vertex detection at an upgraded KEK-B factory, already the highest luminosity collider in the world, will require a detector technology capable of withstanding the increased track densities and larger radiation exposures. Near the beam pipe the current silicon strip detectors have projected occupancies in excess of 100%. Deep sub-micron MAPS look very promising to address this problem. In the context of an upgrade to the Belle vertex detector, the major obstacles to realizing such a device have been concerns about radiation hardness and readout speed. Two prototypes implemented in the TSMC 0.35
μm process have been developed to address these issues. Denoted the Continuous Acquisition Pixel, or CAP, the two variants of this architecture are distinguished in that CAP2 includes an 8-deep sampling pipeline within each 22.5
μm
2 pixel. Preliminary test results and remaining R&D issues are presented.
A method is proposed to measure the photon polarisation parameter
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
...\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\lambda _{\gamma }$$\end{document}
λ
γ
in
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${{b}} \!\rightarrow {s} {\gamma } $$\end{document}
b
→
s
γ
transitions using an amplitude analysis of
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$B\!\rightarrow K\pi \pi {\gamma } $$\end{document}
B
→
K
π
π
γ
decays. Simplified models of the
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${K} {\pi } {\pi } $$\end{document}
K
π
π
system are used to simulate
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $$\end{document}
B
+
→
K
+
π
-
π
+
γ
and
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $$\end{document}
B
0
→
K
+
π
-
π
0
γ
decays, validate the amplitude analysis method, and demonstrate the feasibility of a measurement of the
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\lambda _{\gamma }$$\end{document}
λ
γ
parameter irrespective of the model parameters. Similar sensitivities to
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\lambda _{\gamma }$$\end{document}
λ
γ
are obtained with both the charged and neutral hadronic systems. In the absence of any background and distortion due to experimental effects, the statistical uncertainty expected from an analysis of
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${{{B} ^+}} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^+} {\gamma } $$\end{document}
B
+
→
K
+
π
-
π
+
γ
decays in an LHCb data set corresponding to an integrated luminosity of 9
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\,\hbox {fb}^{-1}$$\end{document}
fb
-
1
is estimated to be 0.009. A similar measurement using
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$${{B} ^0} \!\rightarrow {{K} ^+} {{\pi } ^-} {{\pi } ^0} {\gamma } $$\end{document}
B
0
→
K
+
π
-
π
0
γ
decays in a Belle II data sample corresponding to an integrated luminosity of 5
\documentclass12pt{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\hbox {\,ab}^{-1}$$\end{document}
ab
-
1
would lead to a statistical uncertainty of 0.018.
PDF
