bluuebunny/crossref_metadata_2025_split huggingface dataset:
The detection of tetracycline residues in the liver of Tilapia fish from traditional markets in Yogyakarta using High Performance Liquid Chromatography (HPLC)
Authors: Nugroho M I S , Pawestri W , Hakimah N 
Published: March 2022

Abstract
Antibiotic contamination is detrimental to the aquatic environment of living organisms, such as fish, which are mostly consumed by humans. However, the increase in fish consumption in certain areas should be controlled due to food safety concerns. One of the food safety concerns in Indonesia is the presence of tetracycline residue in fish liver, which can be detected by high-performance liquid chromatography (HPLC). This study aimed to detect tetracycline residue in the liver of tilapia fish from traditional markets in Yogyakarta using HPLC Shimadzu 6.1. The samples were 62 tilapia fish obtained from 16 traditional markets in Yogyakarta and incorporated into the HPLC apparatus at an oven temperature, UV-Vis detector wavelength, flow rate, and amount injection of 30°C, 355 nm, 1 ml/minute, and 20 μl, respectively. The results were presented as chromatograms with peak area, while the positive samples were indicated by the presence of a tetracycline peak area during the 4th minute and 5th minute. The analysis showed that 48.4% of the samples contained tetracycline residue. Also, the presence of tetracycline residues in tilapia livers can be due to antibiotic contamination of the water, the use of antibiotics as a feed additive, or antibiotic contamination of soil ponds.
Development of Sustainability Indicators Related to Traditional Characteristics for Micro-hydro Power Assessment using Delphi Method
Authors: Alhaqurahman Isa M , Sudjono Priana , Sato Tatsuro , Onda Nariaki , Endo Izuki , Takada Asari , Muntalif Barti S , Ide Jun’ichiro 
Published: March 2022

Abstract
The diverse socio-cultural conditions in Indonesia can make it difficult to develop sustainable micro-hydro power (MHP) generation in rural areas. However, the existing framework of sustainable development indicators to assess MHP sustainability does not include indicators for locations with traditional characteristics. This study aimed to develop indicators related to the specific cultural features for evaluating the sustainability of MHP generation. The identification of indicators was accomplished through field investigations and literature studies. Thirty-one experts in the Delphi method validated the indicators. The results revealed three indicators related to specific traditional characteristics and importance to the sustainability of MHP generation, i.e., electricity-supported cultural activities, customary rules of environmental protection, and directive of a traditional leader. These indicators can be elaborated with the existing framework and expected to increase sustainability assessment efforts for MHP generation in remote locations.
A biodegradable water-activated battery: using an activated carbon-based anode and a CNT-based air-cathode
Authors: Trang Nguyen Dang , Nguyen Hoang-Uyen-Dung , Taguchi Kozo 
Published: March 2022

Abstract
Activated carbon has been popularly utilizing for countless applications such as purification of water, heavy metal removal, and natural gas and biogas storage. In this study, a novel phenomenon of activated carbon powder (ACP) has been utilized to realize a disposable water-activated battery. The battery is environmentally friendly because it is based on an ACP-loaded anode and a multiwalled carbon nanotube-coated air-cathode. The air-cathode was integrated on the backside of a paper-based proton exchange membrane. The battery case was made of cardboard for low cost and biodegradability. The proton exchange membrane was attached to the battery case. The anode was separately fabricated and could be simply set in the battery case for power generation. Because the air-cathode was used, the battery case could be reused for many cycles. The anode could also be reused for some cycles. Although the output power capacity of the battery is low in the range of mW kg−1 of ACP, it is made of low-cost and abundant materials, and therefore being able to be scaled up. The battery is a biodegradable on-demand micropower generation.
Impact of the Temperature on the Proton Conductivity and Power Output of a PEFC Operating at High Current Densities
Authors: Santana-Villamar Jordy , Espinoza-Andaluz Mayken , Andersson Martin 
Published: March 2022

Abstract
Polymer Electrolyte Fuel Cells (PEFCs) have great potential as clean energy conversion devices. Therefore, studies are required to increase the understanding of a PEFC at real operating conditions. Two variables that significantly affect the performance are the temperature and the current load. In the present study, a fundamental constitutive part’s performance, e.g., the polymeric membrane (PM) Nafion 212, was evaluated by obtaining its proton conductivity. Also, the cell performance is evaluated considering its output power. Tests were performed in a temperature range of 40-90 °C in steps of 5 °C at a constant current of 50 A. The results show a direct correlation between the proton conductivity and the temperature, and for temperatures greater than 85 °C, the proton conductivity has a growth negligible. It was also found that the PEFC output power has an exponential trend with maximum performance at 75 °C with a power of 25.1 W and proton conductivity of 63 mS.cm−1. Besides, an analysis of the internal factors that impact the proton conductivity and the performance is presented. Finally, empirical correlations for proton conductivity and power output as a function of the temperature with an R-squared larger than 0.96 are proposed.
Comparison of the Dynamics of Parallel Planes in a Confined Jet Impinging on a Slotted Plate Using TR-PIV measurements
Authors: Hamdi J , Assoum H , Alkheir M , Cauet S , Rambault L , Abed-Meraïm K 
Published: March 2022

Abstract
Ventilation systems implemented in buildings form the configuration of impinging jets where the airflow impacts obstacles with different slots. The bad choice of initial conditions such as confinement may cause acoustic incompatibility. Hence, to control these noises in buildings, a 3D experimental study of the impinging jet should be performed to develop its structural characteristics. For this reason, Time Resolved Particle Image Velocimetry (TR-PIV) experiments were carried out on an impinging jet on a slotted plate. Data were acquired on a series of twenty-two parallel planes orthogonal to the slot of the plate, for a Reynolds number of 4458 and a sampling frequency of 5 kHz. The 3D analysis of the flow is carried out in the present paper by discussing the kinematic field of planes in the central and intermediate part of the jet without considering the planes at the edge of the slot. The normalized field of the mean velocity and the turbulence rate of all these planes were presented. The results have shown for a Reynolds number Re = 4458 and a confinement of L/H=4 the flow is two dimensional where the averaged kinematic fields are the same from the midplane P0 until plane P60.
Research on detection of electric concealed equipment based on ground penetrating radar
Authors: Wang Qian , Yang Ying , Sun Wen , Zheng Aixiang 
Published: March 2022

Abstract
For power systems, the operation of concealed power equipment such as grounding grids and underground pipelines affects the system reliability. The ground penetrating radar with ultra-high frequency electromagnetic pulse can detect underground objects without stopping power equipment. It has the advantages of saving costs, improving construction efficiency and helping to improve the stability of the power system. This paper adopts the finite difference time domain method (FDTD) based on fourth-order accuracy which improves the accuracy of the numerical calculation to study the detection and location of concealed equipment in underground power. In this paper, electromagnetic echoes of common metal materials in the grounding grid are calculated. Moreover, the electromagnetic echo is further calculated when the outer layer material and the filling medium changed, and the change law of the waveform is systematically analyzed. The research results provide a theoretical basis for the application of ground penetrating radar technology in engineering practice.
Inverse design of anisotropic and multi-resonant absorbers based on black phosphorus via residual neural network
Authors: Cai Yijun , Feng Kehao , Zhou Yuanguo , Chen Yingshi , Chen Chengying , Abdi-Ghaleh Reza , Zhu Jinfeng 
Published: March 2022

Abstract
Black phosphorus (BP), a new type of two-dimensional material, has attracted extensive attention because of its excellent properties. The anisotropy of BP makes its physical properties vary greatly in different directions, which increases the complexity of the design of BP metamaterials. We present a residual neural network on the basis of the improved adaptive batch normalization algorithm to achieve the inverse design of a multilayer thin film structure based on BP, and we adopt the characteristic matrix method to obtain perfect optical absorption samples. The prediction accuracy of the neural network model is more than 95% for absorbing structures with both single and multiple resonances. This method has the advantages of a fast rate of convergence and high precision of prediction and achieves the design target on the basis of the structure of a BP metamaterial.
Effect of ultrasonic surface rolling process on the impact wear behavior of Inconel 690 alloy at 25 °C and 300 °C
Authors: Yin Meigui , Yin Haiyan , Long Jiangqi 
Published: March 2022

Abstract
As an important nuclear power material, Inconel 690 alloy always need to suffer various harsh impact wear behaviors during its service period. Therefore, how to further enhance its surface wear resistance and objectively reveal its fretting wear mechanism under various conditions have vital scientific values for improving its service performance. This study first applies specific ultrasonic surface rolling process (USRP) to treat the Inconel 690 alloy surface with two and four times separately. And then a controllable impact kinetic energy wear test rig is used to comparative investigate the impact wear behaviors of as-received and USRP treated samples at 25 °C and 300 °C temperature. Results indicate that USRP can effectively improve the near surface Nano-hardness, residual compressive stress and other mechanical properties of Inconel 690 alloy, thereby increasing its impact wear resistance. The impact wear mechanism at 25 °C is plastic deformation causes fatigue spalling, and some adhesion wear are found at the 300 °C wear condition.
Influence of marine sand as fine aggregate on mechanical and durability properties of cement mortar and concrete
Authors: Ganesan Karthikeyan , Kanagarajan Vijai , Dominic Jerlin Regin Joseph 
Published: March 2022

Abstract
Concrete is commonly manufactured using river sand and manufactured sand (M-Sand) as fine aggregates. As river sand has more scarcity, M-Sand is now the preferred fine aggregate. For reduce the consumption and extraction of natural aggregate (river sand), this paper presents washed marine sand (MS) as an alternative fine aggregate that can replace M-Sand. The purpose of this research is to examine the mechanical, micro-structural and durability properties of concrete and cement mortar made with MS as a fine aggregate in partial replacement of M-Sand from 20% to 100%. For better understanding the characteristics of MS and M-Sand, physical properties of MS and M-Sand, as well as the chemical properties of washed and unwashed marine sand are compared. The experimental tests for mechanical properties of compressive strength, elastic modulus, split tensile strength and flexural strength, durability properties of RCPT, sorptivity, acid resistance, alkali attack and water absorption are investigated for cement mortar and concrete. According to this result, 60% of MS meets the desired durability and strength properties. Furthermore, microstructural properties such as EDX and SEM analysis are also carried out to further verify that MS as an alternate fine aggregate.
Microstructure and texture of a novel hot-stamped high-density Ni-Co-W alloy
Authors: Xie Yali , Zhao Xin , Zheng Lei , Chen Leng 
Published: March 2022

Abstract
Ni-Co-W alloy is expected to be a potential material for applications in national defense, military industry and petroleum exploration. Texture has a significant influence on alloy properties. In the present work, a 44Ni-37W-19Co alloy was prepared by vacuum melting and annealed at 1200 °C for 1h after forging, baring and hot stamping. The microstructure and texture at different positions were analyzed by optical micrographs (OM), scanning electron microscopy (SEM), x-ray diffraction (XRD) and electron backscattering diffraction (EBSD) technique. The alloy presents equiaxial grains with an average size of ~90 μm and a nearly random texture. All the average pole intensity levels at surface, sub-surface and center are ~2. The anisotropy degree along the circumferential direction is less than that along the normal direction. The maximum and minimum differences of the radial pole intensity are 0.44 and 0.04, respectively. It is expected that this work will contribute to the controllable effects of microstructure and texture to improve the properties of hot-stamped high-density Ni-Co-W alloys.
Particle simulations on propagation and resonance of lower hybrid wave launched by phased array antenna in linear devices
Authors: ZHU Guanghui , LI Qing , SUN Xuan , XIAO Jianyuan , ZHENG Jiangshan , LI Hang 
Published: March 2022

Abstract
In this work, we performed first-principles electromagnetic-kinetic simulations to study a phased antenna array and its interaction with deuterium plasmas within the lower hybrid range of frequency. We first gave wave accessibility and resonance results, which agree well with theoretical prediction. In addition, we further investigated the antenna power spectrum with different antenna phases in the presence of the plasma and compared it with that in a vacuum, which directly indicates wave coupling and plasma absorption. Furthermore, for the case with zero phasing difference, our simulation results show that, albeit the launch is away from the accessibility region, tunneling effect and mode conversion occurred, which enhanced coupling and absorption. Moreover, consistent interactions between the injected wave and the plasma concerning various antenna phase differences are shown. We presented the inchoate response of the plasma in terms of the launching directions. Our results could be favorable for the engineering design of wave heating experiments with a tunable phased antenna array in linear devices, such as simple magnetic mirrors or tandem mirrors.
Space-resolved vacuum-ultraviolet spectroscopy for measuring impurity emission from divertor region of EAST tokamak
Authors: HE Liang , SHEN Yongcai , ZHANG Hongming , LYU Bo , BAE Cheonho , JI Huajian , LI Chaoyang , FU Jia , DU Xuewei , WANG Fudi , WANG Qiuping , YIN Xianghui , WAN Shunkuan , BIN Bin , LI Yichao , DAI Shuyu 
Published: March 2022

Abstract
The measurement of impurity distribution in the divertor region of tokamaks is key to studying edge impurity transport. Therefore, a space-resolved vacuum-ultraviolet (VUV) spectrometer is designed to measure impurity emission in the divertor region on EAST. For good spectral resolution, an eagle-type VUV spectrometer with 1 m long focal length with spherical holograph grating is used in the system. For light collection, a collimating mirror is installed between the EAST plasma and the VUV spectrometer to extend the observing range to cover the upper divertor region. Two types of detectors, i.e. a back-illuminated charge-coupled device detector and a photomultiplier-tube detector, are adopted for the spectral measurement and high-frequency intensity measurement for feedback control, respectively. The angle between the entrance and exit optical axis is fixed at 15°. The detector can be moved along the exit axis to maintain a good focusing position when the wavelength is scanned by rotating the grating. The profile of impurity emissions is projected through the space-resolved slit, which is set horizontally. The spectrometer is equipped with two gratings with 2400 grooves/mm and 2160 grooves/mm, respectively. The overall aberration of the system is reduced by accurate detector positioning. As a result, the total spectral broadening can be reduced to about 0.013 nm. The simulated performance of the system is found to satisfy the requirement of measurement of impurity emissions from the divertor area of the EAST tokamak.
Low collision energy mutual neutralization reaction of He+ and H−
Authors: Nkambule Sifiso M , Zwane Sibusiso N , Mabuza Oscar N 
Published: March 2022

Abstract
A Semi-classical Landau-Zener model is employed to theoretically study mutual neutralization in the collisions of 4He+ and H−/D−. The model includes ten covalent states and an ion-pair state of 2Σ+ symmetry for the HeH molecular system. Here the assumption is that only two states are interacting at a given internuclear position. In the diabatic representation, the nuclear dynamics relevant for mutual neutralization is modelled for collision energies below 100 eV. The mutual neutralization reaction cross section and final states distribution are computed and compared with previous theoretical and experimental results.
Customizing cardboard as a binder for ecofriendly lightweight building materials
Authors: Ahmed Saddam M 
Published: March 2022

Abstract
Recycling paper and cardboard wastes are becoming important to maintaining a green world. In 2018 manufacturing building materials and their constructions account for 39% of global emissions (13.5 billion tons of CO2). This danger alarm requires immediate action towards seeking for alternatives like traditional materials that have less impact on the environment. Therefore, the current study suggests using new combinations to develop lightweight green building materials. The current research proposes to conduct experimental studies to examine the optimal method for customizing cardboard as a binder for ecofriendly building materials. 17 different mixes were considered in the experimental program; none of these mixes contained cement or consumed any kind of energy. The aim is to develop sustainable lightweight construction materials. Experimental strength results showed a higher strength (up to 7.5 MPa) for some developed substances 22% higher than the strength of traditional mud samples and simultaneously reduction in their weights (dry density 1600 to 1600 kg m−3) in between 13%–16% with superior outdoor durability performance. With these promising results and advantages, the current study can be considered as a primary step towards production of ecofriendly building materials.
EEG functional connectivity and deep learning for automatic diagnosis of brain disorders: Alzheimer’s disease and schizophrenia
Authors: Alves Caroline L , Pineda Aruane M , Roster Kirstin , Thielemann Christiane , Rodrigues Francisco A 
Published: March 2022

Abstract
Mental disorders are among the leading causes of disability worldwide. The first step in treating these conditions is to obtain an accurate diagnosis. Machine learning algorithms can provide a possible solution to this problem, as we describe in this work. We present a method for the automatic diagnosis of mental disorders based on the matrix of connections obtained from EEG time series and deep learning. We show that our approach can classify patients with Alzheimer’s disease and schizophrenia with a high level of accuracy. The comparison with the traditional cases, that use raw EEG time series, shows that our method provides the highest precision. Therefore, the application of deep neural networks on data from brain connections is a very promising method for the diagnosis of neurological disorders.
Solving Newton’s equations of motion with large timesteps using recurrent neural networks based operators
Authors: Kadupitiya J C S , Fox Geoffrey C , Jadhao Vikram 
Published: March 2022

AbstractClassical molecular dynamics simulations are based on solving Newton’s equations of motion. Using a small timestep, numerical integrators such as Verlet generate trajectories of particles as solutions to Newton’s equations. We introduce operators derived using recurrent neural networks that accurately solve Newton’s equations utilizing sequences of past trajectory data, and produce energy-conserving dynamics of particles using timesteps up to 4000 times larger compared to the Verlet timestep. We demonstrate significant speedup in many example problems including 3D systems of up to 16 particles.
Protective or harmful? A qualitative exploration of older people’s perceptions of worries about falling
Authors: Ellmers Toby J , Wilson Mark R , Norris Meriel , Young William R 
Published: March 2022

Abstract

Background
worries about falling are common in older people. It has been suggested that these worries can reduce balance safety by acting as a distracting dual-task. However, it is also possible that worries may serve a protective purpose. The present work adopted a qualitative approach to conduct an in-depth exploration of older people’s experiences of worries about falling.

Methods
semi-structured interviews were conducted with 17 community-dwelling older people (mean age = 79 years; males = 5/17) who reported experiencing worries about falling. Reflexive thematic analysis was used to analyse the data.

Results
experiencing a fall—or otherwise recognising one’s balance limitations—brought the physical realities of participants’ ageing bodies to the forefront of their awareness. This led to the recognition of their susceptibility for an injurious fall, which triggered worries about falling in situations that threatened their balance. When preventing the subject of their worries (i.e. an injurious fall) was perceived to be within the individual’s locus of control, worries led to protective adaptations to behaviour. In contrast, when the subject of their worries was perceived to be outside their control, worries triggered feelings of panic—leading to unhelpful changes in behaviour.

Conclusion
these findings provide novel insight into the development and consequences of worries about falling in older people. They highlight the importance of considering an individual’s perception of control before deciding to clinically intervene to reduce worries about falling.
rbioapi: user-friendly R interface to biologic web services’ API
Authors: Rezwani Moosa , Pourfathollah Ali Akbar , Noorbakhsh Farshid 
Published: March 2022

Abstract

Summary
Many packages serve as an interface between R language and the Application Programming Interface (API) of databases and web services. There is usually a ‘one-package to one-service’ correspondence, which poses challenges such as consistency to the users and scalability to the developers. This, among other issues, has motivated us to develop a package as a framework to facilitate the implementation of API resources in the R language. This R package, rbioapi, is a consistent, user-friendly and scalable interface to biological and medical databases and web services. To date, rbioapi fully supports Enrichr, JASPAR, miEAA, PANTHER, Reactome, STRING and UniProt. We aim to expand this list by collaborations and contributions and gradually make rbioapi as comprehensive as possible.

Availability and implementation
rbioapi is deposited in CRAN under the https://cran.r-project.org/package=rbioapi address. The source code is publicly available in a GitHub repository at https://github.com/moosa-r/rbioapi/. Also, the documentation website is available at https://rbioapi.moosa-r.com.

Supplementary information
Supplementary data are available at Bioinformatics online.