bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-contact quantification of aortic stenosis and mitral regurgitation using carotid waveforms from skin displacements
Authors: Khwaounjoo Prashanna , Dixon Alexander W , HajiRassouliha Amir , Lam Po Tang Emily J , Webster Mark W I , Taberner Andrew J , Nielsen Poul M F , Nash Martyn P , Cakmak Yusuf O 
Published: July 2023

Abstract

Objective. Early diagnosis of heart problems is essential for improving patient prognosis. Approach. We created a non-contact imaging system that calculates the vessel-induced deformation of the skin to estimate the carotid artery pressure displacement waveforms. We present a clinical study of the system in patients (n = 27) with no underlying condition, aortic stenosis (AS), or mitral regurgitation (MR). Main results. Displacement waveforms were compared to aortic catheter pressures in the same patients. The morphologies of the pressure and displacement waveforms were found to be similar, and pulse wave analysis metrics, such as our modified reflection indices (RI) and waveform duration proportions, showed no significant differences. Compared with the control group, AS patients displayed a greater proportion of time to peak (p = 0.026 and p = 0.047 for catheter and displacement, respectively), whereas augmentation index (AIx) was greater for the displacement waveform only (p = 0.030). The modified RI for MR (p = 0.047 and p = 0.004 for catheter and displacement, respectively) was lower than in the controls. AS and MR were also significantly different for the proportion of time to peak (p = 0.018 for the catheter measurements), RI (p = 0.045 and p = 0.002 for the catheter and displacement, respectively), and AIx (p = 0.005 for the displacement waveform). Significance. These findings demonstrate the ability of our system to provide insights into cardiac conditions and support further development as a diagnostic/telehealth-based screening tool.
Bismuth surfactant-enhanced III-As epitaxy on GaAs(111)A
Authors: M Hassanen Ahmed , Herranz Jesus , Geelhaar Lutz , B Lewis Ryan 
Published: July 2023

Abstract
Quantum dot (QD) growth on high (

c

3
v

) symmetry GaAs{111} surfaces holds promise for efficient entangled photon sources. Unfortunately, homoepitaxy on GaAs{111} surfaces suffers from surface roughness/defects and InAs deposition does not natively support Stranski–Krastanov QD growth. Surfactants have been identified as effective tools to alter the epitaxial growth process of III-V materials, however, their use remains unexplored on GaAs{111}. Here, we investigate Bi as a surfactant in III-As molecular beam epitaxy on GaAs(111)A substrates, demonstrating that Bi can eliminate surface defects/hillocks in GaAs and (Al,Ga)As layers, yielding atomically-smooth hillock-free surfaces with RMS roughness values as low as 0.13 nm. Increasing Bi fluxes are found to result in smoother surfaces and Bi is observed to increase adatom diffusion. The Bi surfactant is also shown to trigger a morphological transition in InAs/GaAs(111)A films, directing the 2D InAs layer to rearrange into 3D nanostructures, which are promising candidates for high-symmetry QDs. The desorption activation energy (

U

D
e
s

) of Bi on GaAs(111)A was measured by reflection high energy electron diffraction, yielding

U

D
e
s

= 1.7 ± 0.4 eV. These results illustrate the potential of Bi surfactants on GaAs(111)A and will help pave the way for GaAs(111)A as a platform for technological applications including quantum photonics.
Multimodal piezoelectric energy harvesting on a thin plate integrated with SSHI circuit: an analytical and experimental study
Authors: Hoseyni Seyed Morteza , Simsek Mehmet , Aghakhani Amirreza , Lefeuvre Elie , Basdogan Ipek 
Published: July 2023

Abstract
Multimodal piezoelectric energy harvesting can be achieved by integrating piezo-patch harvesters into plate-like structures available in marine, aerospace, and automotive applications. A synchronized switch harvesting on inductor (SSHI) interface as the harvesting circuit has been well studied for cantilever beams, considering the single vibration mode of the structure. However, integrating a two-dimensional electromechanical structure with a SSHI circuit for multimodal energy harvesting is missing in the literature. This paper evaluates the performance of the SSHI interface integrated with a piezoelectric energy harvester (PEH) on a plate-like host structure. The analytical solution is developed based on an equivalent impedance approach to predict the steady-state electrical response of the harvester as a closed-form solution. The experiments are conducted to validate the analytical solution for the system’s first and second vibration modes. The experimental results reveal that integration of SSHI to a plate-like harvester introduces a multi-switching behavior rather than a standard single-switching behavior. Due to the multimodal vibrational characteristics of the plate, the circuit switch is triggered several times at each half period of the vibration, which increases the energy dissipation of the circuit and thus reduces the output voltage. On the other hand, single switching at each half period of the vibration happens for lower piezoelectric voltage levels. This is the desired behavior of the SSHI circuit where the analytical prediction matches with the experimental data. Finally, the energy harvesting performance of the SSHI circuit is compared against the standard rectifier, showing 183% and 134% power output enhancement for the first and second vibration modes, respectively.
Properties of superconducting MgB2 spherical shells deposited on 2 mm and 1 mm diameter Si3N4 spheres
Authors: Xu Tie-Quan , Sun Rui-Ning , Zhao Jia-Xin , Wang Yue , Wang Fu-Ren , Gan Zi-Zhao 
Published: July 2023

Abstract
Superconducting spherical shells may not only provide an appealing platform for exploring superconductivity in three-dimensional (3D) geometries with curved surfaces, but also be practically applied in important fields, such as in gyroscopes and gravimeters. In inertial confinement fusion (ICF), the perturbation on the target capsule caused by traditional contact support methods is recognized as one of the major contributors to performance degradation in ICF implosions. It was proposed recently that coating the capsule with a thin superconducting MgB2 spherical shell to realize non-contact support by means of magnetic levitation at the required temperatures

∼

20

K might offer a promising solution to this longstanding problem. To simulate the coating of ICF capsules, we deposited MgB2 spherical shells onto polycrystalline Si3N4 spheres (diameter d = 2 mm and 1 mm) via a hybrid physical–chemical vapour deposition technique. For both diameters, the spherical shells, of about 1 µm in thickness and covering the whole spheres completely, were polycrystalline with thin plate-shaped MgB2 crystallites oriented randomly and closely connected. The spherical shells exhibited superconducting transition at a zero resistance temperature

T

c

z
e
r
o

of 38.5–39.4 K in four-probe resistance measurements and ideal diamagnetism at low temperatures in magnetization measurements, suggesting the good crystallinity and homogeneity of the shells. The upper critical field

H

c
2

, the irreversibility field

H

i
r
r

and the lower critical field

H

c
1

were characterized and showed similar magnitudes and temperature dependencies for the d = 2 mm and 1 mm shells, yielding

H

i
r
r

of 7–8 T and

H

c
1

of 7–12 mT at 20 K. The superconducting critical current density

J

c

values, evaluated from the magnetization hysteresis loops, were

1.8
×

10
6

A cm−2 and

8.5
×

10
4

A cm−2 at 20 K under zero and 2 T applied field, respectively, for the d = 1 mm shell. The occurrence of small flux jumps was observed at low temperatures up to 12 K and in low fields below 0.3 T. The results demonstrate the feasibility of fabricating MgB2 spherical shells with properties applicable to potential areas employing magnetic levitation such as in ICF and that MgB2 spherical shells may be exploited as an experimental system to study superconductivity in 3D curvilinear geometry.
Einstein beams and the diffractive aspect of gravitationally-lensed light
Authors: Rodríguez-Fajardo V , Nguyen T P , Hocek K S , Freedman J M , Galvez E J 
Published: July 2023

Abstract
The study of light lensed by cosmic matter has yielded much information about astrophysical questions. Observations are explained using geometrical optics following a ray-based description of light. After deflection the lensed light interferes, but observing this diffractive aspect of gravitational lensing has not been possible due to coherency challenges caused by the finite size of the sources or lack of near-perfect alignment. In this article, we report on the observation of these wave effects of gravitational lensing by recreating the lensing conditions in the laboratory via electro-optic deflection of coherent laser light. The lensed light produces a beam containing regularities, caustics, and chromatic modulations of intensity that depend on the symmetry and structure of the lensing object. We were also able to observe previous and new geometric-optical lensing situations that can be compared to astrophysical observations. This platform could be a useful tool for testing numerical/analytical simulations, and for performing analog simulations of lensing situations when they are difficult to obtain otherwise. We found that laboratory lensed beams constitute a new class of beams, with long-range, low expansion, and self-healing properties, opening new possibilities for non-astrophysical applications.
The Landau-level structure of a single polaron in a nanorod under a non-uniform magnetic field
Authors: Ou Tian-Ji , An Ran , Zhang Wei , Han Shuang , Sun Yong , Rastegar-Sedehi Hamid-Reza , Ma Xin-Jun , Xiao Jing-Lin 
Published: July 2023

Abstract
Nanorod is a unique low-dimensional nanometer structure in which the Landau level arrangement of polaron is essential for understanding its quasiparticle system. However, the stability of the polaron level is susceptible to external factors, such as changing magnetic fields. In this manuscript, the Pekar variational method is employed to calculate the external magnetic field’s effect on the nanorod’s polaron Landau level. It was found that different magnetic fields have different effects on the polaron energy levels of the nanorod, which demonstrated that the external environment had critical effects on the polaron energy levels. This study provides a theoretical basis for regulating the interaction between electrons and phonons in low-dimensional nanomaterials.
SMEFT is falsifiable through multi-Higgs measurements (even in the absence of new light particles)
Authors: Gómez-Ambrosio Raquel , Llanes-Estrada Felipe J , Salas-Bernárdez Alexandre , Sanz-Cillero Juan J 
Published: July 2023

Abstract
By embedding the Standard Model effective field theory (SMEFT) in the more general Higgs effective field theory (HEFT), we expose correlations among the coefficients of the latter that, if found to be violated in future data, would lead to the experimental falsification of the SMEFT framework. These are derived from the necessary symmetric point of HEFT and analyticity of the SMEFT Lagrangian that allows the construction of the SMEFT expansion, as laid out by other groups, and properties at that point of the Higgs-flare function


(
h
)

coupling Goldstone and Higgs bosons, of the Higgs potential V(h) and of the Higgs-top quark coupling function


(
h
)

.
Slow solar wind modeling of the Metis/Solar Orbiter – Parker Solar Probe quadrature
Authors: Adhikari L , Zank G P , Telloni D , Zhao L -L , Pitna A 
Published: July 2023

Abstract
In January 2021, Metis/SolO and PSP formed a quadrature from which the slow solar wind was able to be measured from the extended solar corona (3.5 – 6.3 R⊙) to the very inner heliosphere (23.2 R⊙). Metis/SolO remotely measured the coronal solar wind, finding a speed of 96 – 201 kms−1, and PSP measured the solar wind in situ, finding a speed of 219.34 kms−1. Similarly, the normalized cross-helicity and the normalized residual energy measured by PSP are 0.96 and -0.07. In this manuscript, we study the evolution of the proton entropy and the turbulence cascade rate of the outward Elsässer energy during this quadrature. We also study the relationship between solar wind speed, density and temperature, and their relationship with the turbulence energy, the turbulence cascade rate, and the solar wind proton entropy. We compare the theoretical results with the observed results measured by Metis/SolO and PSP.
Longitudinal parameters measurement at BEPC II storage rings
Authors: Zhu D.C. , Zhang W. , Wang J.Q. , Geng H.P. , Ma H.Z. , Yue J.H. , Cao J.S. , Sui Y.F. 
Published: July 2023

Abstract
A new upgrade to BEPC II has been deployed to improve the
luminosity and maximum energy. After the upgrade, the maximum beam
energy will reach to 2.8 GeV, and the optimized luminosity at
2.35 GeV will be tripled through squeezing the bunch length and the
vertical beta function at the interaction point
β
y
*. Therefore, one more RF cavity will be added to each
ring to increase the RF voltage to 3.3 MV. In order to study the
feasibility of this upgrade and the longitudinal beam
characteristics after the upgrade, some beam-based experiments were
carried out at the electron and positron rings of BEPC II. Bunch
length and its variation with RF gap voltage are measured, shows
that it can be squeezed by approximately 30% at 3.3 MV compared to
the normal 1.65 MV operation voltage. Bunch synchronous phases at
different RF voltages are also obtained by fitting the variation of
bunch centroid with RF voltage at low current. The longitudinal
broadband coupling impedance is measured with streak camera, real
part impedance is obtained from synchronous phase shift with
current, and the imaginary part from bunch lengthening with
current. Energy loss per turn at 2.474 GeV is 363.2 ± 14.5 keV
by measuring synchrotron tune varies with RF voltages.
Effect of B/Si molar ratio on the structure and properties of borosilicate bioactive glasses assessed using molecular dynamics simulations
Authors: Qin Muyan , Li Limei , Ding Jingxin , Huang Chao , Wang Deping 
Published: July 2023

Abstract
Due to the improvement and innovation of theoretical methods and the increasing enhancement of high performance computing, computer simulations provide a new method and strategy for optimizing complex composition of novel bioactive glass. In this work, molecular dynamics simulations were used to analyze the effect of B/Si molar ratio on the structure of borosilicate bioactive glass (BBG) and to investigate the effect of structural alterations on its ions release and biological effects. Structural descriptor a theoretical structural descriptor that estimates the overall strength of the glass network (F
net) was calculated from the simulated data, and the linear relationships of F
net with B and Mg releasing rate in deionized water and simulated body fluid were built. In vitro mineralization experiments showed that all three BBGs could generate hydroxyapatite and the release of some network modifier ions such as Mg would be regulated by the B/Si ratio. In vitro cellular experiments revealed that the BBG sample with a composition of 1.25B (6Na2O–8K2O–8MgO–22CaO–22.5B2O3–2P2O5–31.5SiO2) promoted the proliferation and osteogenic differentiation of rat bone marrow mesenchymal stem cells, and significantly enhanced the expression of osteogenesis-related genes such as osteopontin, which might be related to the release of Mg at an early stage.
Evaluate the population development of green leafhopper as a tungro vector in the endemic area from long-term data
Authors: Senoaji Wasis , Ibrahim Elisurya , Rosida Nur , Heru Praptana R 
Published: July 2023

Abstract
The epidemiological aspect including monitoring is a critical component of implementing an early warning system. The tungro epidemic in rice is influenced by the population dynamics of the green leafhopper vector. Likewise, rainfall and biotic factors affect the abundance of green leafhopper vectors. Long-term data are essential to explain that mechanism, so population predictions on a seasonal scale can be obtained accurately. This paper analyses weekly data on catching green leafhoppers and other arthropods in a continuous cropping system from 2013-2019. We utilize the climatic data gathered to assess the impact of climatic conditions on population dynamics. To improve the additive and homoscedasticity of the time series, we transform the data. The data are fitted in a linear model. The results showed that the green leafhopper population affected the incidence of tungro in the field. From January to December, the population dynamics of the green leafhopper can be characterized. It can assist in monthly population forecasting for the following years. Exogenous and endogenous variables, however, still need to be studied more comprehensively to identify any other predictive components that should be incorporated.
Chemical Compounds and Effectivity of Eucalyptus grandis Oil Against Sitophilus oryzae (Coleoptera: Curculionidae)
Authors: Maulidya Aulia , Rismayani  , Suharto  , Wiratno  , Rizal Molide , Mardiningsih Tri Lestari , Iriani Evi Savitri , Noveriza Rita 
Published: July 2023

Abstract
Indonesia has a lot of aromatic plants that can be distilled to obtain the essential oil. These essential oils can be used for primary component of botanical pesticides due to some components avoided by insect. The study aimed to define the component of Eucalyptus grandis and its potential to control the rice weevil Sitophilus oryzae. The formula of essential oil E. grandis with different concentrations including: 0,25%; 0,5%; 1%; 1,5%; 2%; and control were used to see the mortality of S. oryzae. The result shows that according to the Gas Chromatographic-Mass spectral (GCMS), the E. grandis contains Eucalyptol 46,86%, with the great mortality value of S. oryzae after 96 hours application was 75% at 2% concentration. Thus, the concentration of 1,88 μl/ml of E. grandis was effective to kill 50% of S. Oryzae on day 1. Meanwhile, the concentration of 17,29 μl/ml was effective to kill 95% S. oryzae on day 1. E. grandis contains the most Eucalyptol which tends to be repellent for insects. This suggests that E. grandis could be used as an insecticide alternative to control S. oryzae.
Effect of botanical insecticide application on the population of brown planthopper and its natural enemies and the growth and production of rice plants
Authors: Rismayani  , Trisawa I M , Jufri A , Syakir M , Wiratno  
Published: July 2023

Abstract
Brown planthopper (Nilaparvata lugens Stall) is one of the most dangerous rice pests in Southeast Asia, therefor the population in the plantation must be controlled. This study aimed to determine the effectiveness of the botanical insecticide formulations in controlling brown planthopper attacks, the presence of natural enemies and their impact on the growth and production of rice plants. The study was conducted in the laboratory and the field. Screen house research was conducted in Indonesian Spices and Medicinal Crops Research Institute by testing the botanical insecticide formulation at five concentrations, namely; 0, 0.5, 2.5, 4.5, and 6.5 cc/l, and repeated five times. The results showed that at a concentration of 4.5cc/l, the insecticide was able to cause 97% mortality of the insects. This concentration was then used for spray application in the screen house which showed a more significant number of productive tillers, grain per bunch, and weight of 1000 grains than the control treatment, and about 25% higher in plant production. The Results of the field study conducted in Indramayu District showed that the botanical insecticide was able to suppress the population of N. lugens, but it was safe for natural enemies. The production of plants sprayed with botanical insecticides was 16.39% higher than the control treatment. This indicated that the botanical insecticide tested can be able to suppress the population of N. lugens, but was also safe against natural enemies and increase rice production.
Current Infestation Status and Damage Severity of Eucalyptus Gall Wasps, Leptocybe invasa (Fisher & La Salle), and Ophelimus maskelli Ashmead (Hymenoptera: Eulophidae), Infesting Eucalyptus Germplasms in Tanzania
Authors: Lazaro J , Pudjianto  , Harahap I S 
Published: July 2023

Abstract

Eucalypts spp., are the most popular hardwood timber species in the world, indigenous to Australia, Indonesia, the Philippines, Timor, and New Guinea. Distribution is attributable to their exceptionally high ability to adapt to diverse ecological conditions and the substantially varying products and services they offer. Leptocybe invasa and Ophelimus maskelli are serious pests causing damage to eucalypt plantations in Tanzania. Due to limited knowledge and literature, a study assessed the infestation status and damages of two gall inducers on three government plantations, namely Korogwe, North Ruvu, and Morogoro forests planted with several Eucalypt species, including E. tereticornis and hybrids of E. grandis x E. camadulensis, from October 2021 to April 2022, through assessments of percentage of infested leaves in three crown parts, the association between stand elevations and the infestation magnitude and damage index. Microsoft Excel and Minitab 19 statistical software were used to analyze the data. Results showed positive correlations between wasp infestations and stand altitude among eucalypt germplasms. Clonal hybrids were more infested. The middle crown part was highly infested, followed by the lower crown part at p= 0.880 and p= 0.641 respectively. L.invasa had a higher invasive capacity than O. maskelli. Control efforts should focus on biological control and greenhouse-gall screening to get resistant genotypes. Nevertheless, mass trapping using a yellow sticky trap and a cattle stable can be used for monitoring the pest population immediately.
Survey of diseases affecting tropical fruit trees in Central Panay Island, Philippines
Authors: Leonida Belinda G. , Laspiñas Noemi G. , Gabinete Greta G. 
Published: July 2023

Abstract
The study aimed to determine the diseases infecting the foliage and stems of tropical fruit trees such as durian (Durio zibethinus L.), langsat (Lansium domesticum), mangosteen (Garcinia mangostana), pomelo (Citrus maxima), and rambutan (Nephelium lappaceum L.), the species most affected, resistant and susceptible species. The study was conducted at the DBP Forest within the school reservation of the West Visayas State University-College of Agriculture and Forestry, Lambunao, Iloilo, Panay Island, Philippines. The data gathered were tabulated and analyzed using descriptive statistics. There were eleven evident foliage diseases infecting the fruit trees, including anthracnose, chlorosis, curling, leaf blight, leaf rust, leaf spot, mosaic, powdery mildew, tar spot, shot hole, and sooty molds were recorded. The shot hole disease was observed in five species of fruit trees, while chlorosis infected only pomelo. The powdery mildew was found to have the highest percentage of foliage infection, and the least was chlorosis. There were three kinds of disease infecting the stems that were evident during the time of the survey, including canker, stem rust, and dieback. Three of the five species of fruit trees surveyed were associated with stem diseases, including durian, mangosteen, and pomelo. Moreover, it was found that the rambutan and mangosteen were the most susceptible species infected by foliage diseases and durian for stem diseases.