bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultra-broadband acoustic absorption with inhomogeneous high-order Fabry–Pérot resonances
Authors: Liu Chongrui , Yang Zhengrui , Liu Xiaoli , Wu Jiu Hui , Ma Fuyin 
Published: October 2023

We present an ultra-broadband acoustic metamaterial with inhomogeneous high-order Fabry–Pérot (FP) resonances that achieves near-perfect continuous absorption in the range of 400–10000 Hz. The unit is composed of multiple FP channels with inhomogeneous cross-sectional areas, allowing for flexible adjustment of the impedance characteristics of each channel. This approach prevents the high-order peaks’ resistances from increasing rapidly and ensures a smooth resistance characteristic across a broad frequency range. As a result, the absorption performance in the high-frequency range above 3000 Hz can be significantly enhanced, eliminating the need for conventional porous materials. The inhomogeneous high-order absorption mechanism is investigated thoroughly by theoretical calculations and finite element simulations. By critically coupling the FP channels, a 27-cell broadband metamaterial is obtained with an average absorption coefficient above 90% over 400–10000 Hz, which is verified by experiments in a square impedance tube and an alpha-cabin reverberation room, respectively. Characterized by its extraordinary performance and easy-fabricated structure, this metamaterial has great potential in noise control engineering applications, especially in environments with low temperature, high humidity, or significant dustiness.
Electronic structure in a transition metal dipnictide TaAs2
Authors: Regmi Sabin , Huang Cheng-Yi , Khan Mojammel A , Wang Baokai , Pradhan Sakhya Anup , Hosen M Mofazzel , Thompson Jesse , Singh Bahadur , Denlinger Jonathan D , Ishigami Masahiro , Mitchell J F , Kaczorowski Dariusz , Bansil Arun , Neupane Madhab 
Published: October 2023

Abstract
The family of transition-metal dipnictides has been of theoretical and experimental interest because this family hosts topological states and extremely large magnetoresistance (MR). Recently,

T
a
A
s

2

, a member of this family, has been predicted to support a topological crystalline insulating state. Here, by using high-resolution angle-resolved photoemission spectroscopy (ARPES), we reveal both closed and open pockets in the metallic Fermi surface (FS) and linearly dispersive bands on the (

2
‾

01

) surface, along with the presence of extreme MR observed from magneto-transport measurements. A comparison of the ARPES results with first-principles computations shows that the linearly dispersive bands on the measured surface of

T
a
A
s

2

are trivial bulk bands. The absence of symmetry-protected surface state on the (

2
‾

01

) surface indicates its topologically dark nature. The presence of open FS features suggests that the open-orbit fermiology could contribute to the extremely large MR of

T
a
A
s

2

.
131I dose coefficients for a reference population using age-specific models
Authors: Singh Pradeep Kumar , Patni Hemant Kumar , Roy Rahul , Akar Deepak Kumar , Sawant Pramilla D 
Published: October 2023

Abstract
Age-specific dose coefficients are required to assess internal exposure to the general public. This study utilizes reference age-specific biokinetic models of iodine to estimate the total number of nuclear disintegrations ã(r
S,τ) occurring in source regions (r
S) during the commitment time (τ). Age-specific S values are estimated for 35 target regions due to 131I present in 22 r
S using data from 10 paediatric reference computational phantoms (representing five ages for both sexes) published recently by the International Commission of Radiation Protection (ICRP). Monte Carlo transport simulations are performed in FLUKA code. The estimated ã(r
S,τ) and S values are then used to compute the committed tissue equivalent dose HT(τ) for 27 radiosensitive tissues and dose coefficients e(τ) for all five ages due to inhalation and ingestion of 131I. The derived ã(r
S,τ) values in the thyroid source are observed to increase with age due to the increased retention of iodine in the thyroid. S values are found to decrease with age, mainly due to an increase in target masses. Generally, HT(τ) values are observed to decrease with age, indicating the predominant behaviour of S values over ã(r
S,τ). On average, ingestion dose coefficients are 63% higher than for inhalation in all ages. The maximum contribution to dose coefficients is from the thyroid, accounting for 96% in the case of newborns and 98%–99% for all other ages. Furthermore, the estimated e(τ) values for the reference population are observed to be lower than previously published reference values from the ICRP. The estimated S, HT(τ) and e(τ) values can be used to improve estimations of internal doses to organs/whole body for members of the public in cases of 131I exposure. The estimated dose coefficients can also be interpolated for other ages to accurately evaluate the doses received by the general public during 131I therapy or during a radiological emergency.
A road surface filtering method based on plane normal adaptive constraints
Authors: Liu Haoran , Liu Rufei , Yu Jiayong , Zhao Zhedong 
Published: October 2023

Abstract
Aiming at the problem that the road surface point cloud is difficult to filter due to the complex road conditions and road types, this study proposes a road surface filtering method with plane normal adaptive constraints. After the grid of point cloud data, extracting the road surface seed points by the approximate plane constraint method and establishing the eight-neighborhood grid. We use the improved random sample consensus plane fitting to extract the geometric features of the road surface and carry out the plane normal statistical analysis of the road surface grid. The normal distribution Quantile-Quantile plot and Chi-square test show that the normal vector distribution of the road surface grid conforms to the normal distribution. Establishing the plane normal adaptive parameters using the normal distribution probability-weighted mean and the normal distribution standard deviation, and the plane feature part is automatically constrained. After pretreatment by elevation constraint and filter point re-determination, the road surface area is grown by cluster analysis to obtain the ground point accurately cloud. Through experiments and analysis covering most types of road sections, such as expressway and urban roads, straight and curved roads, gentle roads, and undulating roads, the results show that the road surface point filtering precision, recall rate, and overall accuracy of this method are all above 97 %, which verifies the accuracy and reliability of the method.
Optimizing the friction behavior of medium entropy alloy via controllable coherent nanoprecipitation
Authors: Kong Jiyun , Fang Qihong , Li Jia 
Published: October 2023

Abstract
In recent years, FeCrNi medium entropy alloy, a new material with high hardness, strength, ductility, and wear resistance, has been widely studied. In this work, the effect of precipitation volume fraction on the friction behavior of FeCrNi is studied by molecular dynamics simulation. With the increase of precipitation volume fraction, the average friction coefficient shows an upward trend. When the volume fraction of precipitation is between 2.33% and 3.10%, the wear resistance of FeCrNi would be enhanced after the nanoscratching, and the normal force is large, which means that a certain precipitation volume fraction strengthens FeCrNi. Low precipitation volume fraction can effectively reduce the wear volume and wear rate during scratching, thus effectively lowering frictional force and friction coefficient. The interaction between dislocation and precipitation is an important factor that hinders dislocation propagation, leading to the strong dislocation strengthening and the increase of wear volume. This trend is manifested as the increase of normal force and frictional force. The frictional properties of FeCrNi can be optimized with a certain precipitation volume fraction. The findings give a guiding significance for the effect of multiple precipitation on frictional properties of FeCrNi.
Design and application of a flexible nano cardiac sound sensor based on P(VDF-TrFE)/KNN/GR composite piezoelectric film for heart disease diagnosis
Authors: Luo Yi , Xiao Yu , Liu Jian , Wu Ying , Zhao Zhidong 
Published: October 2023

Abstract
The paper proposes a flexible micro-nano composite piezoelectric thin film. This flexible piezoelectric film is fabricated through electrospinning process, utilizing a combination of 12 wt% poly(vinylidene fluoride-co-trifluoroethylene)(P(VDF-TrFE)), 8 wt% potassium sodium niobate (KNN) nanoparticles, and 0.5 wt% graphene (GR). Under cyclic loading, the composite film demonstrates a remarkable increase in open-circuit voltage and short-circuit current, achieving values of 36.1 V and 163.7 uA, respectively. These values are 5.8 times and 3.6 times higher than those observed in the pure P(VDF-TrFE) film. The integration of this piezoelectric film into a wearable flexible heartbeat sensor, coupled with the RepMLP classification model, facilitates heartbeat acquisition and real-time automated diagnosis. After training and validation on a dataset containing 2000 heartbeat samples, the system achieved an accuracy of approximately 99% in two classification of heart sound signals (normal and abnormal). This research substantially enhances the output performance of the piezoelectric film, offering a novel and valuable solution for the application of flexible piezoelectric films in physiological signal detection
Charged nanoporous phosphorene as a water desalination membrane: insights from molecular dynamics
Authors: Gaganpreet  , Pathania Y 
Published: October 2023

Abstract
Phosphorene, due to its remarkable properties such as self-passivation, stability, and anti-fouling, makes it a promising material for desalination membranes. Practically, these membranes acquire charges and affect the salt rejection and water flux. In this article, water desalination performance through positively charged (PC), negatively charged (NC), and charged but overall neutral (CN) single-layer nanoporous phosphorene (NPP) membrane of nanopore size ∼41 Å2 is investigated using pressure-driven molecular dynamics simulations. It is observed that the electrostatic interactions due to the distribution of charge around the nanopore edges strongly affect the desalination performance rather than steric hindrance. Overall, with an equivalent magnitude of total applied charge, the water flux through the CN membrane is more than PC and NC membranes. A membrane best suited for desalination performance among the charged NPP membranes is a CN membrane due to its high flux and adequate salt rejection, though it allows the passage of both ions. Comparatively, a PC or NC membrane has lower flux and allows the course of their counter ions respectively. To construe this observation salt ion density maps and molar concentration profiles are further examined. The degree of localization of counter ions around the nanopore edge increases with the increased total applied charge. While no such localization is observed for the CN membranes. PC and NC membranes provide more energetic barriers to co-ions due to strong coulombic repulsions and molecular layering of the adsorbed water, which hinder their transport. This study suggests the design of charged phosphorene membranes to maximize water transport while still maintaining the salt rejection potential.
Methods and evaluation of physiological measurements with acoustic stimuli—a systematic review
Authors: Laufs Christian , Herweg Andreas , Antink Christoph Hoog 
Published: October 2023

Abstract

Objective. The detection of psychological loads, such as stress reactions, is receiving greater attention and social interest, as stress can have long-term effects on health O’Connor, Thayer and Vedhara (2021 Ann. Rev. Psychol.
72, 663–688). Acoustic stimuli, especially noise, are investigated as triggering factors. The application of physiological measurements in the detection of psychological loads enables the recording of a further quantitative dimension that goes beyond purely perceptive questionnaires. Thus, unconscious reactions to acoustic stimuli can also be captured. The numerous physiological signals and possible experimental designs with acoustic stimuli may quickly lead to a challenging implementation of the study and an increased difficulty in reproduction or comparison between studies. An unsuitable experimental design or processing of the physiological data may result in conclusions about psychological loads that are not valid anymore. Approach. The systematic review according to the preferred reporting items for systematic reviews and meta-analysis standard presented here is therefore intended to provide guidance and a basis for further studies in this field. For this purpose, studies were identified in which the participants’ short-term physiological responses to acoustic stimuli were investigated in the context of a listening test in a laboratory study. Main Results. A total of 37 studies met these criteria and data items were analysed in terms of the experimental design (studied psychological load, independent variables/acoustic stimuli, participants, playback, scenario/context, duration of test phases, questionnaires for perceptual comparison) and the physiological signals (measures, calculated features, systems, data processing methods, data analysis methods, results). The overviews show that stress is the most studied psychological load in response to acoustic stimuli. An ECG/PPG system and the measurement of skin conductance were most frequently used for the detection of psychological loads. A critical aspect is the numerous different methods of experimental design, which prevent comparability of the results. In the future, more standardized methods are needed to achieve more valid analyses of the effects of acoustic stimuli.
The percolating cluster is invisible to image recognition with deep learning
Authors: Bayo Djénabou , Honecker Andreas , Römer Rudolf A 
Published: October 2023

Abstract
We study the two-dimensional site-percolation model on a square lattice. In this paradigmatic model, sites are randomly occupied with probability p; a second-order phase transition from a non-percolating to a fully percolating phase appears at occupation density pc
, called percolation threshold. Through supervised deep learning approaches like classification and regression, we show that standard convolutional neural networks (CNNs), known to work well in similar image recognition tasks, can identify pc
and indeed classify the states of a percolation lattice according to their p content or predict their p value via regression. When using instead of p the spatial cluster correlation length ξ as labels, the recognition is beginning to falter. Finally, we show that the same network struggles to detect the presence of a spanning cluster. Rather, predictive power seems lost and the absence or presence of a global spanning cluster is not noticed by a CNN with a local convolutional kernel. Since the existence of such a spanning cluster is at the heart of the percolation problem, our results suggest that CNNs require careful application when used in physics, particularly when encountering less-explored situations.
Localization of gravitino field with non-minimal coupling on a thick brane
Authors: Zhou Xiang-Nan , Guo Wei-Qi 
Published: October 2023

Abstract
In this paper, we investigate localization of a five-dimensional gravitino field on a thick brane with non-minimal coupling. By choosing the gauge condition Ψ
z
= 0, the equations of the Kaluza-Klein (KK) modes of gravitino are obtained. Compared with the case without non-minimal coupling,considering non-minimal coupling can make the zero mode and massive KK modes of a five-dimensional free massless gravitino field be localized on the brane. By considering the Yukawa-like coupling and the non-minimum coupling simultaneously, it is found that the non-minimal coupling will change the mass spectrum of the KK modes and provide more possibility to localize KK modes.
Gravitational waves from defect-driven phase transitions: domain walls
Authors: Blasi Simone , Jinno Ryusuke , Konstandin Thomas , Rubira Henrique , Stomberg Isak 
Published: October 2023

Abstract
We discuss the gravitational wave spectrum produced by first-order phase transitions
seeded by domain wall networks. This setup is important for many two-step phase transitions as
seen for example in the singlet extension of the standard model. Whenever the correlation length
of the domain wall network is larger than the typical bubble size, this setup leads to a
gravitational wave signal that is shifted to lower frequencies and with an enhanced amplitude
compared to homogeneous phase transitions without domain walls. We discuss our results in light of
the recent PTA hints for gravitational waves.
The Influence of Ginger Rhizome Extraction on the Content of the Active Ingredients [6]-Gingerol Produced
Authors: Rachman D , Nasori A S , Atmaji P , Wiguna B , Kahfi J , Maryana E , Mardliyati E , Purwanto W , Sativa R G , Sulaswatty A , Muhamaludin  , Mufti A , Aji G K , Bachtiar A , Supriyadi  
Published: October 2023

Abstract
Oleoresin, a product derived from ginger rhizomes, contains a high concentration of active compounds and has the potential to be used not only as a medicine but also as a beneficial natural ingredient material to the human body. Ginger oleoresin is a valuable product that contains a variety of compounds and provides functional health benefits as well as immunity boosters to large groups of people. Gingerol is a key ingredient in ginger rhizome oleoresin extract. Gingerol (C17H26O4) is a compound found in ginger oleoresin that easily decomposes into Shogaols (C17H24O3). The ethanolic extract of zingiber rhizomes powder was processed with the best yield of oleoresin of 38.313% and concentration of [6]-gingerol of 0.39 mg/g extract, which was produced in 120 minutes at a temperature of 60 0C. While the best [6]-gingerol content in oleoresin was 1.33 mg/g extract with a ginger oleoresin yield of 21.821% produced under 50 0C extraction temperature in 60 minutes.
Agronomic Response of Soybean Accession at Two Spacings
Authors: Purwaningrahayu R D , Kuntyastuti H 
Published: October 2023

Abstract
The key to optimizing plant productivity is superior plant varieties combined with proper plant management. The purpose of this study was to learn about the responses of various soybean accessions to different spacings. During the dry season of 2019, the research was conducted in Genteng, Banyuwangi research station. The study employed a split plot design with two factors, which was repeated three times. The main plot was the planting method: (1). 2:1 double rows = 50 cm x (30 cm x 15 cm) (2) Single row: 30 cm x 15 cm spacing. 15 soybean accessions were used as sub-plots. Six accessions have the potential to produce seeds greater than 3 t ha-1 based on productivity per hectare. Differences in plant spacing influenced plant height, internode length, number of branches, and seed weight. Longer stems and nodes distinguished the single row. The seed yield per plant was higher in double rows than in single rows.
Ornamental fish farmers empowerment through feed making technology: A study in Yogyakarta city, Indonesia
Authors: Ika S R , Mulyono A , Syamsiro M , Widagdo A K 
Published: October 2023

Abstract
Using automation technologies for fish feed production, this project intends to capture the activities of groups of ornamental fish farmers. The ornamental fish industry is concerned with ways to raise fish that are attractive and endearing when they are contested. The likelihood of winning increases with fish attractiveness, which drives up the price of ornamental fish. Hence, depending on whatever body component needs to be maximized, the content of ornamental fish feed varies. Currently, ornamental fish farmers grind their feed by hand before printing it into tiny spheres that are ready to eat, depending on the age and body part optimization needs of the fish. The empowerment activity aims to increase the productivity of fish feed production by disseminating technology for fish feed-making equipment, including flour-making machines, mixing machines, and printing machines. Training on how to use and take care of the above machines and how to sell the fish feed products made, as well as recording business transactions, were also carried out. Indicators of the success of empowerment activities are an increase in ornamental fish farmers’ income, production capacity, and sales turnover.
The Effect of NAA and BA on In Vitro Callus Induction of Biduri (Calotropis gigantea)
Authors: Wulandari TA , Sakya AT , Hartati S , Samanhudi  , Rahayu M , Setyawati A 
Published: October 2023

Abstract
A family of medicinal plants known as biduri (Calotropis gigantea) has a number of useful traits. Alkaloids, glycosides, phenolics, tannins, flavonoids, terpenes, and sterols are just a few of the chemical substances found in biduri. One method used to boost the generation of secondary metabolites is biduri callus induction by tissue culture. The goal of the study was to find the ideal growth regulator concentration for callus biduri induction. The study employed a completely randomized design (CRD), which was carried out three times and was set up in a factorial fashion with two treatment components and 25 treatment combinations. The growth regulator NAA and the growth regulator BA were the first and second factors, respectively. ANOVA was used to examine the data with a 5% level test. The Duncan Multiple Range Test (DMRT) was conducted at a 5% level if there was a significant difference. A compact, green callus texture was generated by applying one ppm NAA and three ppm BA. At the same time, a callus on the biduri could not have been treated without an NAA application. Further research can be done by subculture callus biduri when the callus is still fresh and green to produce secondary metabolites.
BAP and Kinetin Application for In Vitro Bud Induction of Vanilla (Vanilla planifolia Andrews.) from Stem Node Explants in the Initiation Stage
Authors: Mahardhini AD , Anwar S , Karno  
Published: October 2023

Abstract
Due to the scarcity of seedlings, vanilla farming in Indonesia is not at its best. The goal of this study was to comprehend how BAP and Kinetin affected the introduction of vanilla buds as a sustainable seedling strategy. The study is carried out at Salatiga, Central Java, Indonesia, at the Plant Tissue Laboratory of the Plantation Seeds Center and the Plant Tissue Laboratory of Diponegoro University’s Physiology and Plant Breeding Laboratory. A completely randomized design (CRD) 5 x 3 with two replications was utilized in the study. The first factor is BAP concentration: B0 = 0 mg.L−1, B1 = 0.6 mg.L−1, B2 = 1.2 mg.L−1, B3 = 1.8 mg.L−1, and B4 = 2.4 mg.L−1. The second factor is Kinetin concentration: K0 = 0 mg.L−1, K1 = 1 mg.L−1, and K2 = 2 mg.L−1. The result shows addition of BAP is able to shorten the day of bud emergence at 8 days. The addition of BAP and Kinetin did not significantly affect the number of buds. Application of BAP 1.44 mg.L−1 was able to increase bud length. There is interaction between Kinetin 2 mg.L−1 and the addition of BAP 2.4 mg.L−1 resulting in the largest bud diameter with a linear regression form. There is interaction between Kinetin 0 mg.L−1 and BAP 1.2 mg.L−1 resulting in the highest number of roots.