Summary
We investigated the association between blood pressure variability measured by the coefficient of variation (CV) of blood pressure and hip fracture in older persons with diabetes. After ...excluding patients with acute complications and comorbidities, a positive association with similar magnitude of strength was found between BP variability and hip fracture, compared with that in the original analysis.
Introduction
Hypertension is a risk factor of osteoporosis and hip fracture, but studies have yet to investigate whether blood pressure variability measured by the CV of blood pressure can predict hip fracture in older persons with diabetes.
Methods
We conducted a retrospective cohort study on 21,160 patients who suffered from type 2 diabetes (age ≥ 50 years) and participated in the National Diabetes Care Management Program in Taiwan. The patients’ 1-year variability in systolic blood pressure (SBP) and diastolic blood pressure (DBP) at the baseline and subsequent hip fracture incidence for 8.2 years were analyzed.
Results
There were 937 recorded incident hip fractures. SBP-CV and DBP-CV were classified based on their tertiles. After multivariate adjustment was conducted, SBP-CV found to be a predictor of hip fracture, and its hazard ratio was 1.18 (95% CI 1.00–1.40) for the third tertile compared with the first tertile.
Conclusions
Our study suggests SBP stability is a predictor for hip fracture incidence in older persons with type 2 diabetes.
Topological insulators exhibit metallic surface states populated by massless Dirac fermions with spin-momentum locking, where the carrier spin lies in-plane, locked at right angles to the carrier ...momentum. Here, we show that a charge current produces a net spin polarization via spin-momentum locking in Bi2Se3 films, and this polarization is directly manifested as a voltage on a ferromagnetic contact. This voltage is proportional to the projection of the spin polarization onto the contact magnetization, is determined by the direction and magnitude of the charge current, scales inversely with Bi2Se3 film thickness, and its sign is that expected from spin-momentum locking rather than Rashba effects. Similar data are obtained for two different ferromagnetic contacts, demonstrating that these behaviours are independent of the details of the ferromagnetic contact. These results demonstrate direct electrical access to the topological insulators' surface-state spin system and enable utilization of its remarkable properties for future technological applications.
Abstract
The interactions between electrons and antiferromagnetic magnons (AFMMs) are important for a large class of correlated materials. For example, they are the most plausible pairing glues in ...high-temperature superconductors, such as cuprates and iron-based superconductors. However, unlike electron-phonon interactions (EPIs), clear-cut observations regarding how electron-AFMM interactions (EAIs) affect the band structure are still lacking. Consequently, critical information on the EAIs, such as its strength and doping dependence, remains elusive. Here we directly observe that EAIs induce a kink structure in the band dispersion of Ba
1−
x
K
x
Mn
2
As
2
, and subsequently unveil several key characteristics of EAIs. We found that the coupling constant of EAIs can be as large as 5.4, and it shows strong doping dependence and temperature dependence, all in stark contrast to the behaviors of EPIs. The colossal renormalization of electron bands by EAIs enhances the density of states at Fermi energy, which is likely driving the emergent ferromagnetic state in Ba
1−
x
K
x
Mn
2
As
2
through a Stoner-like mechanism with mixed itinerant-local character. Our results expand the current knowledge of EAIs, which may facilitate the further understanding of many correlated materials where EAIs play a critical role.
Aims
To explore biocontrol potential of 39 DAEB isolates (doubly antagonistic towards both
Verticillium dahliae
Kleb and
Fusarium oxysporum) against verticillium wilt of cotton and to elucidate ...colonization and category characteristics of an endophytic bacterium with significant biocontrol activity.
Methods and Results
Thirty‐nine antagonistic endophytic bacteria strains were tested for their ability to control verticillium wilt in cotton plants caused by a defoliating pathotype of
V. dahliae 107 in cotton under controlled conditions. The biocontrol trial revealed that an endophytic bacterium, designated HA02, showed a significant biocontrol activity to
V. dahliae 107. After cotton seedlings were inoculated with a gfp gene‐tagged HA02 (HA02‐gfp), HA02‐gfp populations were higher in the root than in the stem; in addition, the HA02‐gfp was distributed in the maturation zone of cotton root. Furthermore, HA02‐gfp also colonized seedlings of maize, rape and soybean after the bacteria inoculation. Phylogenetic trees based on 16S rDNA sequences combined with morphological, physiological and identification showed that the bacterium belongs to the Enterobacter genus.
Conclusions
Our results showed that only 1 of 39 DAEB isolates demonstrated more efficient biocontrol potential towards V. dahliae 107 in greenhouse and field trials. HA02‐gfp mainly colonized cotton in roots. In addition, we quantitatively observed HA02 colonization in other hosts. HA02 belongs to the Enterobacter genus.
Significance and Impact of the Study
This is the first study on biocontrol to defoliating pathotype of
V. dahliae
Kleb by endophytic bacteria. The HA02 showed effective biocontrol to
V. dahliae 107 in greenhouse and field trials. Furthermore, we assessed the quantitative and qualitative colonization of HA02 in cotton seedlings. Our study provides basic information to further explore managing strategies to control this critical disease.
Abstract
The time-variable velocity fields of solar-type stars limit the precision of radial-velocity determinations of their planets’ masses, obstructing detection of Earth twins. Since 2015 July, ...we have been monitoring disc-integrated sunlight in daytime using a purpose-built solar telescope and fibre feed to the HARPS-N stellar radial-velocity spectrometer. We present and analyse the solar radial-velocity measurements and cross-correlation function (CCF) parameters obtained in the first 3 yr of observation, interpreting them in the context of spatially resolved solar observations. We describe a Bayesian mixture-model approach to automated data-quality monitoring. We provide dynamical and daily differential-extinction corrections to place the radial velocities in the heliocentric reference frame, and the CCF shape parameters in the sidereal frame. We achieve a photon-noise-limited radial-velocity precision better than 0.43 m s−1 per 5-min observation. The day-to-day precision is limited by zero-point calibration uncertainty with an RMS scatter of about 0.4 m s−1. We find significant signals from granulation and solar activity. Within a day, granulation noise dominates, with an amplitude of about 0.4 m s−1 and an autocorrelation half-life of 15 min. On longer time-scales, activity dominates. Sunspot groups broaden the CCF as they cross the solar disc. Facular regions temporarily reduce the intrinsic asymmetry of the CCF. The radial-velocity increase that accompanies an active-region passage has a typical amplitude of 5 m s−1 and is correlated with the line asymmetry, but leads it by 3 d. Spectral line-shape variability thus shows promise as a proxy for recovering the true radial velocity.
The open-cell porous Ti-6Al-4V structure, intended to be applied as replacement for human cortical and cancellous bone, are fabricated by selective laser melting (SLM). The computer aided design ...(CAD) was used to design porous structures in various porosity levels from 40% to 80% and with pore sizes from 600 to 1000 μm, in order to fit the bone-tissue in-growth. The SLM porous samples with 40% to 70% porosity matched well with the CAD structure, but the 80% porosity one was found to be difficult to achieve the design. In comparison with the CAD structures and the SLM samples, there are minor discrepancies in terms of pore size and ligament width, mainly a result of laser beam broadening. To achieve more precise SLM porous morphologies, further reduction of powder size and laser beam diameter would be necessary. The measured data on the Young's modulus and yield strength of the SLM porous samples can be roughly estimated by the Gibson and Ashby model. The sample with 67% porosity was found to match best with human bone, with Young's modulus of 15 GPa and yield stress of 129 MPa, preventing from the risk of stress shielding effect.
•The porous Ti-6Al-4V foams are prepared by selective laser melting.•Minor discrepancies between CAD and SLM are due to laser beam broadening.•The 67% porosity sample matches with human bone avoiding stress shielding effect.
Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 ...TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law R^{Δ} with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.
There is little question that the “electronic revolution” of the 20th century has impacted almost every aspect of human life. However, the emergence of solid‐state electronics as a ubiquitous feature ...of an advanced modern society is posing new challenges such as the management of electronic waste (e‐waste) that will remain through the 21st century. In addition to developing strategies to manage such e‐waste, further challenges can be identified concerning the conservation and recycling of scarce elements, reducing the use of toxic materials and solvents in electronics processing, and lowering energy usage during fabrication methods. In response to these issues, the construction of electronic devices from renewable or biodegradable materials that decompose to harmless by‐products is becoming a topic of great interest. Such “green” electronic devices need to be fabricated on industrial scale through low‐energy and low‐cost methods that involve low/non‐toxic functional materials or solvents. This review highlights recent advances in the development of biodegradable materials and processing strategies for electronics with an emphasis on areas where green electronic devices show the greatest promise, including solar cells, organic field‐effect transistors, light‐emitting diodes, and other electronic devices.
Recent research progress of biodegradable materials and green processing for green electronics is comprehensively reviewed. The biodegradable materials used for different functional layers and green/nontoxic processing for solar cells, organic field‐effect transistors, light‐emitting diodes, and other devices are discussed in detail. Future development and a perspective for green electronics are also proposed and presented.
Mobile edge computing (MEC) brings computation capacity to the edge of mobile networks in close proximity to smart mobile devices (SMDs) and contributes to energy saving compared with local ...computing, but resulting in increased network load and transmission latency. To investigate the tradeoff between energy consumption and latency, we present an energy-aware offloading scheme, which jointly optimizes communication and computation resource allocation under the limited energy and sensitive latency. In this paper, single and multicell MEC network scenarios are considered at the same time. The residual energy of smart devices' battery is introduced into the definition of the weighting factor of energy consumption and latency. In terms of the mixed integer nonlinear problem for computation offloading and resource allocation, we propose an iterative search algorithm combining interior penalty function with D.C. (the difference of two convex functions/sets) programming to find the optimal solution. Numerical results show that the proposed algorithm can obtain lower total cost (i.e., the weighted sum of energy consumption and execution latency) comparing with the baseline algorithms, and the energy-aware weighting factor is of great significance to maintain the lifetime of SMDs.
Summary
Background
Few studies have examined the association between psoriasis and glomerulonephritis (GN) as well as chronic kidney disease (CKD).
Objectives
To determine the risk of CKD in patients ...with psoriasis and evaluate the impact of the severity of psoriasis, comorbidities and concomitant drugs on the risk of GN and CKD in patients with psoriasis.
Methods
We identified 4344 patients with psoriasis for the study cohort and randomly selected 13 032 subjects as a control cohort. Each subject was individually followed for up for 5 years to identify those who subsequently developed GN and CKD.
Results
After adjustment for traditional CKD risk factors, psoriasis was found to be independently associated with an increased risk of CKD during the follow‐up period hazard ratio (HR) 1·28; 95% confidence interval (CI) 1·14–1·44. The increased incidence of GN in patients with psoriasis (HR 1·50, 95% CI 1·24–1·81) may contribute to the positive association between psoriasis and CKD. Patients with mild and severe psoriasis had an increased risk of CKD and GN compared with the control cohort; the risk increased with severity. Patients with psoriasis and arthritis exhibited a higher risk of CKD than patients without arthritis (HR 1·62 vs. 1·26). Among drugs, nonsteroidal anti‐inflammatory drugs (NSAIDs) have the strongest association with CKD in patients with psoriasis (adjusted odds ratio 1·69, 95% CI 1·14–2·49).
Conclusions
Psoriasis was associated with a higher risk of developing CKD and GN. High severity, psoriatic arthritis involvement and concomitant NSAIDs use further increased the risk of CKD in patients with psoriasis.
What's already known about this topic?
There is an increased risk of multiple comorbidities in patients with psoriasis.
What does this study add?
Both mild and severe psoriasis presented an increased risk of chronic kidney disease (CKD) and glomerulonephritis, independent of traditional risk factors for CKD.
The development of CKD in patients with psoriasis was multifaceted. High severity, psoriatic arthritis involvement and concomitant nonsteroidal anti‐inflammatory drug use further increased the risk of CKD in patients with psoriasis.
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