bluuebunny/crossref_metadata_2025 huggingface dataset:
Thai National Radio Astronomy Observatory Project and a future South-East Asian VLBI Network
Authors: Sugiyama Koichiro , Jaroenjittichai Phrudth , Leckngam Apichat , Kramer Busaba H. , Rujopakarn Wiphu , Soonthornthum Boonrucksar , Sakai Nobuyuki , Hidayat Taufiq , Zainal Abidin Zamri , Carlos Algaba Juan , Ngoc Diep Pham , Poshyachinda Saran ,   TNRO project team members
Published: June 2024

NARIT initiated a national flagship project in 2017 for development of radio astronomy and geodesy in Thailand. In this project, a 40-m Thai National Radio Telescope (TNRT) and a 13-m VLBI Global Observing System radio telescope are constructed in Chiang Mai. The 40-m TNRT is the largest telescope for radio astronomy in South-East Asia. Its flexible operation with a wide-frequency coverage 0.3-115 GHz will allow us to uniquely contribute to the time-domain astronomy as well as carry out unbiased surveys for a wide variety of research fields, which were published in a white paper. Within the framework of collaboration with VLBI arrays in the world, TNRT will drastically improve the imaging quality and performances based on its unique geographical location. Through commissioning of the L-band system, the 1st Call for Proposals of the 40-m TNRT in the L-band1 has been internationally announced on 10th October 2023, TST 10 am. Future vision for establishment of forthcoming regional VLBI networks based on TNRT is also introduced: Thai National VLBI Array and South-East Asian VLBI Network in collaboration with Indonesia, Malaysia, and Vietnam.
The Development of Android-Based Interactive Learning Media on the Topic of Discussing the Atmosphere
Authors: Raisal A Y , Rakhmadi A J , Hidayat M
Published: June 2024

Low comprehension and lack of interest among students are caused by the lack of variety in learning media. Consequently, the creation of more diverse learning materials is required. The aim of this study is to create interactive learning resources for Android users that cover the topic of atmosphere discussion. Using the ADDIE development process (analyze, design, development, implementation, and evaluation), this kind of study is Research and Development. Expert validation in media and materials yielded very valid and valid criteria, respectively. The expert validation results demonstrate that the created learning media are suitable for use in the educational process. Since PowerPoint is the most often used presentation tool by educators, the media was created with it in mind, making it easier for teachers to create Android-based learning materials. In the meantime, development and implementation trials must be conducted to assess the degree of applicability and efficacy of the media.
Performance analysis of reed valve of rolling piston compressor based on fluid-structure interaction
Authors: Chen Debiao , Zhang Chaolei , Gao Wenzhao
Published: June 2024

To analyze the influence of different thickness reed valves on the exhaust pressure pulsation, a two-way fluid-structure interaction model of the reed valve of the rolling piston compressor is established in this paper. Based on the results of the two-way fluid-structure coupling analysis, the deformation displacement and the influence on the pressure pulsation of the rolling piston compressor in a cycle under different reed valve thicknesses are compared. The analysis results show that under specific working conditions, with the increase of the thickness of the reed valve, the maximum deformation displacement decreases, the peak value of the exhaust pressure pulsation decreases, and there will be a phenomenon of early closing. The overall analysis obtains a better valve thickness. The research results have certain guiding significance for optimizing the structure of the reed valve and the comprehensive performance optimization of the rolling piston compressor.
Thermal characteristics analysis of hydrostatic lubrication of involute spline guideway
Authors: Xi Haoran , Li Dong , Qi Houjun , Jiao Yuze , Zheng Shuguo
Published: June 2024

Aiming at the locking phenomenon of YK5115AK2 gear shaper under high-speed operation, based on fluid-solid coupling, the maximum temperature rise and deformation of guide rails with different convection modes are analyzed. The control variable method is used to analyze the oil film gap, feed rate, oil supply pressure, hydraulic oil viscosity, and sealing edge design parameters of the guide rail, and the relationship between these parameters and the maximum temperature rise of the guide rail is discussed. The results show that when the working conditions are satisfied, the larger the oil film clearance is, the smaller the feed speed is, and the smaller the oil supply pressure should be adopted. Therefore, the appropriate low-viscosity hydraulic oil should be selected. Under the condition of meeting the requirements of working conditions, the short sealing oil edge should be shortened as much as possible, while the long sealing oil edge can be extended appropriately to achieve the best thermal steady-state performance of the guide rail.
Effect of tempering temperatures on microstructure and mechanical properties of high-strength steel
Authors: Zhang Xiaolu , Li Rui , Sun Zhiyan , Zhang Yunfei , Zhao Yingli , Fan Mingqiang , Ji Shuang , Chen Wei , Zhao Nan , Zhang Xinyue
Published: June 2024

This study thoroughly examines the effects of tempering temperature on the structure and mechanical properties of high-strength steel. The objective is to establish a solid foundation of raw materials for the production of relevant equipment. Experimental results show that: when tempering temperatures between 180°C~300°C, with the increase of tempering temperature, the tensile stress of the material decreases gradually, and the yield strength tends to increase. The comprehensive mechanical properties of the alloy are optimized in plasticity and toughness, and it can be seen that the strength reaches an excellent balance at 180°C. The carbide precipitation and impact fracture characteristics are analyzed by scanning electron microscopy and transmission electron microscopy, and it is found that a large number of needle-shaped ε-carbides are precipitated in the martensite lath, and the size of the ε-carbides increases with the increase in tempering temperature, which is the reason for the gradual decrease in the yield strength of the experimental steel with the increase in tempering temperature.
Study on buckling of thin-walled composite cylinder under C-SS boundary condition
Authors: Yang Zilong , Li Wusheng , Yang Fujiang
Published: June 2024

The spigot is a common connecting method for composite containers with thin walls. The fixture is closer to the thin-walled cylindrical shell with one end clamped and one end supported (C-SS) than the boundary conditions of typical pressure vessels, which are supported (SS-SS) or clamped (C-C) at both ends. Under the boundary condition, there are very few calculations and experimental research. A buckling model of the thin-walled composite vessel was built, and the critical load was determined using the energy technique and the classical thin-walled theory. Using nonlinear numerical analysis and FEM, the buckling mode was simulated. Numerical examples were used to examine the impacts of the spigot’s length, boundary conditions, layup thickness, and sequencing on the critical load. The findings indicate that a shorter spigot, a thicker layup, and a small-angle layer closer to the center all increase the critical load. The boundary conditions of SS-SS, C-S, and C-C experienced increasing critical loads in that order; the latter was around 1.5~2 times more than the former. Ultimately, external pressure tests were used to evaluate the buckling critical loads of two distinct laminated thin-walled composite vessels, confirming the correctness of both the FEM results and the theoretical model. The variance for the former was 15%, while the latter was 8%. The findings can serve as guidelines for designing interference and winding pre-stress spigots and the structural stability study of thin-walled composite vessels.
The influence of plasma arc composite laser welding parameters on aluminum alloy weld seam weld penetration
Authors: Wu Xiaocui , Liu Changjun , Liu Jian
Published: June 2024

In laser and plasma arc compound heat source welding technology, we collected a series of comparative data for a full range of analyses. We proceeded with an in-depth discussion of these two welding technologies in terms of the weld penetration, the melted width, the shape and size of the weld, laser power, heat source spacing, and welding speed. After research, we found that during laser-arc hybrid welding, weld penetration is very sensitive to laser power and welding speed but relatively less sensitive to heat source spacing and welding speed.
Preparation and properties of high-density polyethylene / thermoplastic polyurethane / calcium sulphate whisker composites
Authors: Zhang Daohai , Xu Yuhuan , Liu Guilan , Xue Yu , Shi Lianjun , Chen Qianlin , Xie Tian
Published: June 2024

In this study, composites of High-density polyethylene (HDPE) / Thermoplastic polyurethane (TPU)/Calcium Sulfate Whiskers (CSW) with varying mass fractions were created by using a melt blending process. The aim was to analyze how the addition of CSW to the composites impacted their mechanical and thermal properties as well as the interplay between the substrates. The findings demonstrate that the inclusion of CSW whiskers in HDPE/TPU composites led to a significant enhancement in their mechanical and thermal properties. Furthermore, a robust interfacial adhesion was observed between CSW whiskers and the HDPE/TPU matrix polymer.
Performance improvement and optimization of nano-based coatings
Authors: Peng Chenglong , Liu Xiaoqin
Published: June 2024

Polyaniline Graphene (PAGO) is a composite nanomaterial, which is mainly prepared from aniline and Graphite oxide (GO) by in-situ polymerization. Through the action of PAGO, the corrosion resistance of water-based anti-corrosion coatings can be effectively improved. The microstructure of PAGO was analyzed by XRD, SEM, and TEM, and the influence of the number of composite nanomaterials and the mass ratio of Polyaniline to Graphene on the performance of the paint film was analyzed. The results show that the corrosion resistance of waterborne epoxy resin can be effectively improved by combining the passivation effect of Polyaniline on a metal substrate with the barrier effect of lamellar Graphene.
Anti-icing properties of superhydrophobic surface with nanoscale pores
Authors: Li Bo , Xiang Huiying , Yuan Yuan
Published: June 2024

Outdoor equipment icing has a great impact on people’s production and life. The study of superhydrophobic (SHP) coating or surface is expected to obtain an excellent anti-icing effect. However, SHP coatings or surfaces still face the failure of superhydrophobic properties and poor durability. Herein, the anti-icing properties of SHP were improved by constructing a nano-scale deep pore structure on the aluminum substrate surface. Compared with the untreated surface, the SHP surface shows a longer frosting time (42 min) and extremely small ice adhesive strength (3 kPa). This study provides a durable SHP surface for icing prevention of outdoor equipment.
Research on full position CMT welding process for circular pipes
Authors: Lei Jiaxuan , zhang Fenglong , Ren Xianghui , Han Shanguo , Li Zhenlong
Published: June 2024

The CMT welding technology is adopted to solve the difficulties in full-position welding of circular pipes, and a robotic arm is controlled to achieve automatic full-position welding. The characteristics and laws of weld formation are studied by adjusting technology parameters like welding current, angle, and speed. The results show that once the welding current increases, the fusion depth and width of the weld simultaneously increase. However, as the welding speed increases, the depth and width of fusion decrease. Root welding experiments indicate that the optimal morphology of the root weld is achieved under the welding current of 200 A at the 0.2 m/min welding speed. In the weld filling experiment, both the left and right passes use the welding current of 260 A at the 0.2 m/min welding speed, which can fill the weld with two passes and achieve complete well formation.
Experimental and numerical simulation research on fluid pressure drop inside sintered metal porous plates
Authors: Lin Shengcun , Shi Fusheng , Feng Wenxiu
Published: June 2024

At present, research on fluid flow characteristics in porous media is mostly conducted through experimental and simulation methods, and some damping prediction models for fluid flow in porous media have been proposed. These prediction models may not be entirely suitable for all porous media, as porous media have various factors such as complex pore channels, resulting in vastly different calculation results for different prediction models on the same porous media. Based on experiments, this article adopts the standard k in numerical simulation research k -ε. The turbulence model is used to simulate the flow of liquid in porous plates, and the comparison between numerical simulation results and experimental results proves the standard k-ε. The turbulence model can be well applied in the numerical simulation of porous plates prepared in this paper, providing feasible references for the numerical simulation of the fluid performance of porous plates.
Stamping process analysis and progressive die design of l-panel for specific car seats
Authors: Zhang Huiju , Li Chunhui , Zhuo Liyun
Published: June 2024

The frequent use of electric vehicle seats will lead to the loosening of their fixing devices, which will bring certain safety risks. This article studied the core component of the fixing device - L-panel, analyzed its forming process performance and focused on controlling the springback during its forming process, so as to prevent any issues related to low position accuracy when securing electric seats. Moreover, the die design was also carried out. A set of 8-station progressive dies was completed, which was of good precision, high production rate, good feasibility for mass production, good product interchangeability, and extremely high intelligent automation production.
Preparation and regulation of electromagnetic parameters of Ti3C2Tx@Ni composite powders
Authors: Hu Shujun , Li Shibo , Pan Peng , Ge Feng , Yang Ming , Yu Jinxi , Wang Jinnan
Published: June 2024

Novel electromagnetic (EM) materials with adjustable EM properties are anticipated to fulfill the requirements of electronic communication, national defense, and aerospace fields. In this study, functional Ti3C2T
x
@Ni composite powders with adjustable Ni content were successfully prepared using a facile electroless plating strategy. The EM parameters can be regulated by controlling the Ni content in Ti3C2T
x
@Ni composite powders. As the Ni content increases, the values of real and imaginary parts of the complex permittivity of the Ti3C2T
x
@yNi/wax (y = 10 ~ 80) in the 2-18 GHz show a trend of initially decreasing and then increasing. The real and imaginary parts of the complex permeability of Ti3C2T
x
@yNi/wax range from 0.95 to 1.03 and −0.10 to 0.07, respectively. After introducing magnetic Ni, Ti3C2Tx exhibits dielectric and magnetic losses on EM waves, with dielectric losses having a greater dissipation on the EM waves.
Research on smart manufacturing technology of reinforcing bars for bridge precast concrete structure
Authors: Liu Tiancheng , Zhu Chao , Tong Zengyi , Luo Dongchao
Published: June 2024

As the main material in the production process of a concrete segmental beam in the traditional infrastructure industry, the processing automation is low and the quality is difficult to control, which affects the overall mechanical properties of the structure. To improve the efficiency and quality of steel processing, regarding the segmental beams of Huangmaohai Link as the research object, adopting the idea of the combination of “software & hardware”, the reinforcement model established by BIM technology is used as the data source of intelligent building, and the intelligent tooling is used as the “executor” of brilliant construction data source, and the soft and hard interaction. The results show that visualization simulation optimization of steel reinforcement and the control of intelligent construction data sources of steel reinforcement can be realized through BIM technology. The correct BIM-reinforced model can optimize the nesting and generate the blanking list based on the integer programming algorithm so that the residual material rate of the material is the lowest, which is conducive to cost-saving control. The intelligent tooling equipment can read the blanking list into the equipment, realize the intelligent processing of the semi-finished products of steel bars and mesh, and ensure the quality of reinforcement processing, which can enhance the disaster prevention ability of Bridges. Finally, the steel BIM model will be transformed into an engineering entity through intelligent tooling with high efficiency and low cost, which enhances the ability of bridges to prevent earthquakes and reduce disasters. Research results will drive the development of smart manufacturing technologies in the overall infrastructure industry.
The structure evolution of austenite stainless steel with pre-shot peening during plasma nitriding
Authors: Shen Lie , Wang Wei , Zhao Wei , Hui Zhuofan , Sui Jianghua , Sun Peng
Published: June 2024

Austenitic stainless steel is a very promising metal bipolar plate for proton exchange membrane fuel cells (PEMFC), which has advantages such as high mechanical strength, easy processing, and low cost. However, it is prone to corrosion in the acidic environment of PEMFC, which can have adverse effects on its lifespan and conductivity. By adopting a composite modification method to generate a dense nitride structure on the surface of 304 stainless steel bipolar plates, the corrosion resistance of the bipolar plate substrate can be improved. In this paper, shot peening pretreatment and plasma nitriding hybrid modification methods were employed to improve nitriding efficiency and reduce nitriding critical temperature, which generated a modified layer with good corrosion resistance on the surface of 304 austenitic stainless steel.
Characteristics analysis on 3D blade tip clearance response with regard to turbine blade crack azimuth angle
Authors: Fan Bochao , Zhang Xiaodong , Xiong Yiwei
Published: June 2024

In view of the insufficiency that blade tip timing signals offer merely one-dimensional information, which restricts the extraction of fault characteristics during the detection of blade cracks, a three-dimensional blade tip clearance (3D-BTC) finite element (FE) model of aero-engine turbine blade-disk-shaft system is developed. With the proposed FE model, the effect of crack azimuth angle on the 3D-BTC of aero-engine turbine blades is analyzed. Firstly, a FE model of the aero-engine turbine blade-disk-shaft system is established. Then, the through crack is introduced at the blade, and the blade deformation under the influence of cracks at different roll angles and pitch angles is calculated by transient dynamics analysis. Finally, the spectrum of the 3D-BTC is obtained, and the characteristics of the 3D-BTC response concerning blade crack azimuth angle are investigated. The results show that the crack reduces the blade stiffness and affects the 3D-BTC. The 3D-BTC decreases with the enlargement of the crack roll angle, and it shows a decrease and then an increase as the crack pitch angle becomes larger. The radial tip clearance is easily affected by the position of the measurement point, while the circumferential deflection angle and the axial deflection angle at different measurement points show a consistent trend. The information on cracks can be reflected more accurately on the basis of the 3D-BTC.
Efficient drainage design of cathode catalyst layer for pure oxygen proton exchange membrane fuel cells
Authors: Bai Ying , Cheng Ming , Cheng Xiaojing , Li Huiyuan , Shen Shuiyun , Yan Xiaohui , Zhang Junliang
Published: June 2024

To promote the application of pure oxygen proton exchange membrane fuel cell (PEMFC) technology in unmanned underwater devices, it is crucial to effectively address the water management problem of the PEMFC. The membrane electrode assembly (MEA) serves as a key component for electrochemical reactions and mass transfer, and the physicochemical properties of the porous structure of the cathode catalyst layer (CCL) determine the efficient transport of reactants and products inside the electrode. In this paper, the effect of hydrophobic modification of polytetrafluoroethylene (PTFE) nanoparticles in the CCL on cell performance was investigated through comprehensive electrochemical tests and physical characterizations. The performance of the optimally modified MEA was significantly improved by 84.6% compared with that of the conventional MEA, which could be mainly attributed to less residual liquid inside the electrode by the hydrophobic modification of PTFE, further proven by electrochemical impedance spectroscopy (EIS) results. The optimization would significantly mitigate the flooding phenomenon in pure oxygen PEMFC and facilitate the continuity of the redox reaction in a highly efficient way.
Numerical simulation of electron beam welding and local heat treatment of TC4 titanium alloy sheet
Authors: Gu Sendong , Zhao Jipeng , Ma Yanlong , Yang Wenbo , Yu Bin , Wang Tian
Published: June 2024

The paper object of this proposal was the electron beam welding (EBW) and electron beam local heat treatment (EBLHT) of a titanium alloy sheet. A three-dimensional thermal-mechanical coupled finite element (FE) model is established based on the FE software, and its secondary development function. Electron beam scanning experiments were performed on an 8 mm thick TC4 titanium alloy sheet. The cross-sectional morphologies of the different fusion zones are obtained. Weld surface width and weld penetration are compared between experimental results and simulated data. The model analyzed the temperature distributions on the sheet during the EBW and EBLHT processes.
Application of weibull model and birnbaum-saunders model in fracture life prediction of 316l stainless steel joint at 550°C
Authors: Hu Yunyi , An Ziliang , Sun Yannan , Li Xinxin
Published: June 2024

In this paper, the 316L-SS fracture life data obtained by stretching the specimens at 550°C high temperature is comparatively analyzed by Weibull distribution and Birnbaum-Saunders distribution. The tensile strength corresponding to the high-temperature fracture characteristic life of 316L-SS diffusion bonding joints based on the Weibull model is given by power law distribution. The final result indicates that the BS analysis model has high reliability from the perspective of engineering, and the Weibull model is practical in materials science research.
Study of thinning rate in incremental forming with hydraulic pressure supports based on taguchi design
Authors: Shang Miao , Li Yan , Yang Mingshun , Shi Panrong
Published: June 2024

Incremental sheet forming technology has great potential for forming thin-walled parts. However, the excessive thinning rate and uneven thickness distribution seriously affect the performance of forming. To reduce the sheet thickness reduction rate during the incremental forming process, hydraulically supported incremental forming technology is adopted, the thickness reduction rate of parts with different pressures, sheet thicknesses, and sizes was experimentally investigated and optimized by using Taguchi’s method. The results show that in the designed experimental scheme, the most significant elements affecting the thickness reduction rate are the forming angle and hydraulic pressure; the optimum thickness reduction rate is obtained by selecting the appropriate hydraulic pressure, lower forming angle, and larger sheet thickness. In incremental forming, this helps to enhance the thickness uniformity of parts, the quality, and the formability of the form.
Study of temperature conduction processes in sandwich structures
Authors: Zou Duoyijia , Chang Geng , Du Wei , Pan Xuchao
Published: June 2024

The sandwich structure is a common protective design that has been extensively used in the field of protection, but few studies have been done on its multilayer temperature conduction characteristics. Based on one typical sandwich protective structure, a temperature conduction model is established. The IMEX method is used to solve the established model, and then the attenuation rate of the temperature field with changes in the protective structure’s dimensions is theoretically calculated. Simultaneously, a simulation experimental platform is set up, and temperature conduction experiments are conducted. The results show that the theoretical model could describe the temperature conduction process of the sandwich structure, and the experimental results are in good agreement with the theoretical calculations; when the structural parameters are fixed, the temperature of each layer of the material increased gradually with time and finally tended to be stabilized. The rate of change of temperature is the largest in 0 s ~ 200 s; when the parameters are fixed in time, the temperature decreases gradually with the change of spatial position and finally tends to be stabilized. The thermal conduction rate of each layer of the material determines its change. The temperature change rate of the heat insulation layer and air layer is relatively high. The research can provide support and reference for the design of sandwich temperature protection structures.
Experimental studies of anodized Al surface with composite nanopore structures to enhance the anti-icing properties of transmission lines
Authors: Li Bo , Jie Bai , Fan Lei , Zeng Huarong , Mu Hao , Dai Xu , Xiao Jie , Hua Xujiang , Li Qi , Yuan Yuan , Liao Ruijin
Published: June 2024

Anti-icing is crucial for transmission conductors to avoid long-term power outages caused by severe icing climates. Here, superhydrophobic aluminum conductors with composite honeycomb nanopore structures were prepared by the twice-anodic oxidation method. Effects of the anodized current density on the surface morphology, structure, hydrophobicity, and anti-icing performance were experimentally studied. As the current density increases, the film thickness of the lower layer of a small nanopore structure increases, while the dissolution effect on the upper layer of a large nanopore structure is strengthened. Also, the composite nanopore structure exists in the damaged condition and has a rougher surface at the micron level. By comparing the surface wettability and anti-icing performance of all samples, the sample under the current density of 0.01875A/cm2 showed the optimal anti-icing properties, including a contact angle (CA) of 168°, the ice adhesion force of 4.87 kPa, and the longest frost formation time. The good anti-icing performance makes the anodized aluminum of composite nanopore structures a satisfactory candidate for improving their anti-icing behavior in the industry.
Electrolytic polishing process of intravascular nitinol stents
Authors: Zhu Lin , Teng Ruijing , Zhao Jonathon , Tu Jiangping
Published: June 2024

The incidence of peripheral arterial disease (PAD) is steadily rising in China due to the aging population, and the number of PADs requiring intervention is increasing. Minimally invasive treatment is an effective method to treat PAD, and nitinol alloy vascular stent has become an effective and safe minimally invasive treatment method. Nitinol stent has a favorable shape memory effect, super elasticity, and biocompatibility. Stents need to have good corrosion resistance and biocompatibility in blood vessels, so the surface treatment of stents is particularly critical. This research mainly studies the effect of electrolytic polishing technology on the surface of nitinol alloy stents. The specific research results are as follows: when the polishing time is 60 S and the polishing current is 2 A-2.5 A, the surface of the stent is brighter and the surface roughness of the stent is lower. Using a pulse power supply as the polishing power supply, when the duty cycle is 50%, the surface of the stent is better and the surface roughness is lower.
Reliability analysis of chain tool magazine based on improved FMECA
Authors: Lin Chaohui , Wang Manxin , Zheng Wenbo , Zhu Jianguo , Xia Kangjun
Published: June 2024

The chain tool magazine is the core component of the machining center, and its reliability is a key factor affecting the reliability of the machining center. Aiming at the reliability problems in using chain tool magazines, an improved FMECA reliability analysis method based on expert scoring information is proposed. Regarding risk analysis, cosine similarity is used to screen and eliminate inexperienced experts, and experts are considered. Occupation and duration information improves the credibility of the score output. The expert group score volatility is used to construct a subsystem reliability score correction factor, which is used to improve the consistency of the subsystem risk analysis results. It can guide the chain tool magazine in the improvement design stage. It provides important references for reliability allocation, fault warning, and maintenance during use.
Application of multinomial logistic regression toward adaptive reuse of pre-war shophouses
Authors: Ebas N A , Mohd Abdullah M S , Shafi M A , Rusiman M S
Published: June 2024

Pre-war shophouses are among the national heritage buildings that require conservation efforts, among others through adaptive reuse. Adaptive reuse of building assets is considered to be a sustainable way of bypassing the wasteful processes of demolition and reconstruction. However, adaptive reuse is not an easy decision because there are many factors affecting it. Therefore, the criteria for adaptive reuse need to be considered before choosing the potential adaptive reuse. There are six broad aspects to the criteria of adaptive reuse, which are economic, environment, social, architecture, technology, and legislative. A questionnaire survey among five (5) different backgrounds of respondents, also known as stakeholder, consists of a town planner from local authorities, a valuer from the valuation and property service department (JPPH), architects, researchers, and building owners to achieve the objectives. From the analysis, three (3) potential new uses, which are new shophouses, restaurants and hotels are identified as very suitable alternatives and represent an independent variable. This paper aims to identify the relationship between the decision made by stakeholders and the potential alternative adaptive reuse.
Small field measurements using electronic portal imaging device
Authors: Sait A Aziz , Yoganathan SA , Jones Glenn W , Patel Tusar , Rastogi Nikhil , Pandey SP , Mani Sunil , Boopathy Raghavendiran
Published: June 2024

Purpose/Objective. Small-field measurement poses challenges. Although many high-resolution detectors are commercially available, the EPID for small-field dosimetry remains underexplored. This study aimed to evaluate the performance of EPID for small-field measurements and to derive tailored correction factors for precise small-field dosimetry verification. Material/Methods. Six high-resolution radiation detectors, including W2 and W1 plastic scintillators, Edge-detector, microSilicon, microDiamond and EPID were utilized. The output factors, depth doses and profiles, were measured for various beam energies (6 MV-FF, 6 MV-FFF, 10 MV-FF, and 10 MV-FFF) and field sizes (10 × 10 cm2, 5 × 5 cm2, 4 × 4 cm2, 3 × 3 cm2, 2 × 2 cm2, 1 × 1 cm2, 0.5 × 0.5 cm2) using a Varian Truebeam linear accelerator. During measurements, acrylic plates of appropriate depth were placed on the EPID, while a 3D water tank was used with five-point detectors. EPID measured data were compared with W2 plastic scintillator and measurements from other high-resolution detectors. The analysis included percentage deviations in output factors, differences in percentage for PDD and for the profiles, FWHM, maximum difference in the flat region, penumbra, and 1D gamma were analyzed. The output factor and depth dose ratios were fitted using exponential functions and fractional polynomial fitting in STATA 16.2, with W2 scintillator as reference, and corresponding formulae were obtained. The established correction factors were validated using two Truebeam machines. Results. When comparing EPID and W2-PSD across all field-sizes and energies, the deviation for output factors ranged from 1% to 15%. Depth doses, the percentage difference beyond dmax ranged from 1% to 19%. For profiles, maximum of 4% was observed in the 100%–80% region. The correction factor formulae were validated with two independent EPIDs and closely matched within 3%. Conclusion. EPID can effectively serve as small-field dosimetry verification tool with appropriate correction factors.
Port Chaplaincy and the Wider Community
Authors: Sampson Helen , Turgo Nelson , Cadge Wendy , Gilliat-Ray Sophie
Published: June 2024

Chapter 6 considers the relationship between port chaplains, seafarers’ centres, and wider society. It describes the strong connections that can exist between port chaplains, seafarers’ centres, local churches, and community groups and the role of these connections in fundraising and providing gifts to seafarers. The chapter also describes the ways in which seafarers’ centres and port chaplaincy are supported by a variety of national organizations and community groups and concludes that it is important for chaplains to foster and maintain both their national and local connections with small and large-scale groups and with appropriate networks in order to support their work.
Piperacillin/Tazobactam Susceptibility Test Interpretive Criteria for Enterobacterales: Recommendations From the United States Committee on Antimicrobial Susceptibility Testing
Authors: Lodise Thomas P , Bhavnani Sujata M , Ambrose Paul G , Sader Helio S , Andes David , Pogue Jason M
Published: June 2024

The in vitro susceptibility testing interpretive criteria (STIC) for piperacillin/tazobactam (TZP) against Enterobacterales were recently updated by the US Food and Drug Administration, Clinical and Laboratory Standards Institute, and European Committee on Antimicrobial Susceptibility Testing. The United States Committee on Antimicrobial Susceptibility Testing (USCAST) also recently reviewed TZP STIC for Enterobacterales and arrived at different STIC for Enterobacterales. Here, we explain our recommendations and rationale behind them. Based on our review of the available data, USCAST does not recommend TZP STIC for certain Enterobacterales species that have a moderate to high likelihood of clinically significant AmpC production (Enterobacter cloacae, Citrobacter freundii, and Klebsiella aerogenes only) or for third-generation cephalosporin-nonsusceptible Enterobacterales. USCAST recommends a TZP susceptibility breakpoint of ≤ 16/4 mg/L for third-generation cephalosporin-susceptible Enterobacterales and only endorses the use of extended infusion TZP regimens for patients with infections due to these pathogens.
COVID-19 virus mutation prediction with LSTM and attention mechanisms
Authors: Burukanli Mehmet , Yumuşak Nejat
Published: June 2024

Coronavirus disease 2019 (COVID-19), caused by Severe Acute Respiratory Syndrome Coronavirus 2, is an emerging and rapidly spreading type of coronavirus. One of the most important reasons for the rapid spread of the COVID-19 virus are the frequent mutations of the COVID-19 virus. One of the most important methods to overcome mutations of the COVID-19 virus is to predict these mutations before they occur. In this study, we propose a robust HyperMixer and long short-term memory based model with attention mechanisms, HyperAttCov, for COVID-19 virus mutation prediction. The proposed HyperAttCov model outperforms several state-of-the-art methods. Experimental results have showed that the proposed HyperAttCov model reached accuracy 70.0%, precision 92.0%, MCC 46.5% on the COVID-19 testing dataset. Similarly, the proposed HyperAttCov model reached accuracy 70.2%, precision 90.4%, MCC 46.2% on the COVID-19 testing dataset with an average of 10 random trail. Besides, When the proposed HyperAttCov model with 10 random trail has been compared with compared to the study in the literature, the average of performance values has been increased by accuracy 7.18%, precision 37.39%, MCC 49.51% on the testing dataset. As a result, the proposed HyperAttCov can successfully predict mutations occurring on the COVID-19 dataset in the 2022 year.
Factors associated with intent to stay in the profession: an exploratory cluster analysis across healthcare professions in Switzerland
Authors: Roth Leonard , Gilles Ingrid , Antille Emilie , Jubin Jonathan , Jolidon Vladimir , Oulevey-Bachmann Annie , Peytremann-Bridevaux Isabelle
Published: June 2024

Retention issues are widespread within the health workforce. This cross-sectional study used data collected from 1707 healthcare professionals in 2022–23 to identify with k-means clustering groups of individuals sharing similar working experiences. These profiles were linked with varying levels of turnover intentions and a range of healthcare professions. While occupational therapists and paramedics reported in average better working conditions, registered nurses and intermediate caregivers reported the poorest experiences. In other clusters, salaries were high where work–life balance was low, and inversely. By learning from similarities and differences in the working conditions of diverse healthcare professionals, shared initiatives aimed at improving retention across professions can be facilitated.
A Debate of the Highest Order: The Brexit Referendum as Second-Order Role Contestation
Authors: Martill Benjamin , Rogstad Adrian
Published: June 2024

The 2016 Brexit referendum reignited debate on the UK’s international role. Yet the stakes were complex, since neither side challenged Britain’s global leadership role or its strong ties with non-European partners. Research on role contestation has thus struggled to account for the politics of Brexit, focusing instead on non-role-based conflict. We argue that Brexit debates can be understood by reference to second-order role contestation where role compatibility itself is the subject of political disagreements, a phenomenon role theory scholarship has missed by studying role conflict and role contestation in isolation. We distinguish between inclusive and exclusive second-order conceptions, which capture the respective positions of the Leave and Remain campaigns regarding Britain’s European role and its relation to other (shared) roles. Our argument shows that role conflict is often contested politically and that role contestation operates at higher levels of abstraction than conventionally acknowledged.
Searching for choice and control: Western Australian service provider experiences of health, housing and migration
Authors: Connor Elizabeth , Blackford Krysten , McCausland Kahlia , Lobo Roanna , Crawford Gemma
Published: June 2024

This research aimed to inform approaches to increase access to secure housing and improve mental health outcomes for migrants from culturally and linguistically diverse backgrounds (hereafter migrants) who are generally invisible in health and social policy and service provision in Western Australia. We used semi-structured, in-depth interviews (n = 11) and interpretative phenomenological analysis to explore service provider experiences and perspectives of issues impacting service provision and the needs of migrants in this context. Five superordinate themes reveal complex experiences for both service providers and the migrants with whom they work. Findings reflect tensions between contemporary notions of choice and control and a social service system that is difficult to navigate, reflects systemic racism and appears to rely heavily on the non-government sector. Insights have important and practical implications for health promotion policy, practice and research. Recommendations include improvements to housing access, provision, funding and policies; addressing service barriers via staff training and more accessible community resources; and co-design and community outreach approaches.
Influences on COVID-19 booster uptake among adults intending to receive a booster: a qualitative study
Authors: Moore Ramey , Purvis Rachel S , Willis Don E , Li Ji , Selig James P , Ross Jeanne , McElfish Pearl A
Published: June 2024

Bivalent COVID-19 vaccine boosters have been recommended for all Americans 12 years of age and older. However, uptake remains suboptimal with only 17% of the United States (US) population boosted as of May 2023. This is a critical public health challenge for mitigating the ongoing effects of COVID-19 infection. COVID-19 booster uptake is not currently well understood, and few studies in the US have explored the vaccination process for booster uptake in a ‘post-pandemic’ context. This study fills gaps in the literature through qualitative analysis of interviews with a racially/ethnically diverse sample of Arkansans who received the COVID-19 vaccine main series and expressed intent to receive a booster (n = 14), but had not yet received the COVID-19 booster at the time we recruited them. All but one did not receive the booster by the time of the interview. Participants described influences on their vaccination behavior and uptake of boosters including reduced feelings of urgency; continued concerns about the side effects; social contagion as a driver of urgency; increasing practical barriers to access and missing provider recommendations. Our findings highlight the importance of considering vaccination as an ongoing, dynamic process drawing on past/current attitudes, prior experience, perceptions of risk and urgency and practical barriers. Based on these findings, healthcare providers should continue to provide strong, consistent recommendations for COVID-19 boosters to patients, even among those with histories of vaccine uptake.
Associations between noticing public health education campaigns about cannabis and risk perceptions in the northern Canadian territories: a cross-sectional study
Authors: Schwartz Naomi , Poon Theresa , Hammond David , Hobin Erin
Published: June 2024

This study investigated whether noticing cannabis education campaigns was associated with increased cannabis risk perceptions in Canada’s three territories following non-medical cannabis legalization. Data were from the Cannabis Policy Study in the Territories, including 2452 participants, age ≥16 years residing in Yukon, Northwest Territories and Nunavut. Poisson regression with robust standard errors were used to estimate associations between noticing cannabis education campaigns and moderate to very high risk perceptions of daily cannabis smoking, vaping, edible use and exposure to second-hand cannabis smoke, adjusting for sociodemographic characteristics and cannabis-use frequency. Results were compared with associations with risk perceptions of daily alcohol consumption and cigarette smoking, not included in cannabis education campaigns. Interactions were examined between noticing education campaigns and age group and cannabis-use frequency. Cannabis education campaigns were noticed by 40.4% of respondents, with lower awareness among those with lower education and income. Noticing campaigns was associated with higher risk perceptions of daily cannabis smoking [adjusted risk ratio (RRadj) = 1.09, 95% confidence interval (CI): 1.02–1.16] and vaping (RRadj = 1.09, 95%CI: 1.02–1.16). Significant interactions were not found with age group or cannabis-use frequency. Findings are consistent with modest effects of cannabis education campaigns. Approaches are needed to increase reach of cannabis education campaigns, including among groups with lower education and income.
Era of the Female Witness: Jewish Women and the Trial of Klaus Barbie
Authors: Valanzola Ashley
Published: June 2024

In May 1987, Sabine Zlatin and Simone Lagrange became household names in France after they testified against the infamous Nazi Klaus Barbie, “the Butcher of Lyon,” during his trial for crimes against humanity. On the witness stand, Zlatin’s testimony revealed her perseverance as a Polish-Jewish immigrant involved extensively in wartime rescue and resistance. Meanwhile, Lagrange shared her encounters as a thirteen-year-old Jewish girl whom Klaus Barbie tortured. Throughout Barbie’s trial, national and international media outlets reported frequently on Zlatin and Lagrange’s wartime and postwar lives. The enormous media attention the trial received made it a crucial event during the resurgence of Holocaust memory in France, yet what made this trial unique regarding the role of Jewish women as witnesses was its timing in the aftermath of the women’s rights movement. The feminist movement allowed people to better understand the gendered nature of Zlatin and Lagrange’s testimonies and recognize their persecution and perseverance as women during and after the war. Going forward, the centrality of experiences shared by women shaped how the trial would be remembered, and arguably even influenced a greater consideration of crimes against women within the statutes for crimes against humanity.
Genome resequencing reveals the genetic basis of population evolution, local adaptation, and rewiring of the rhizome metabolome in Atractylodes lancea
Authors: Zhang Chengcai , Wang Sheng , Sun Jiahui , Li Xiangkong , Wang Hongyang , Guo Xiuzhi , Wang Yuefeng , Jiang Daiquan , Lyu Chaogeng , Kang Chuanzhi , Zhang Yan , Xiang Zengxu , Yuan Qingjun , Yan Binbin , Qin Ming , Huang Luqi , Guo Lanping
Published: June 2024

The formation of high-quality Chinese medicinal materials is a micro-evolutionary process of multiple genes involving quantitative inheritance under environmental stress. Atractylodes lancea is a traditionally used medicinal plant in China that is broadly distributed and possesses a considerable amount of essential oils. However, to date, limited research has been conducted to characterize the genetics and metabolites of A. lancea shaped by natural variation. Hence, we assembled a high-quality genome of A. lancea, featuring a contig N50 of 1.18 Mb. We further integrated population resequencing of A. lancea and conducted analyses to characterize its genetic diversity, population evolution, and rewiring of volatile metabolites. The natural variation effect exerted significant pressure on A. lancea from different geographic locations, resulting in genetic differentiation among three groups. Correlation analysis of metabolites in A. lancea revealed significant natural variations of terpenoids, heterocyclic compounds, ketones, and esters. We also found that 427 metabolites displayed noteworthy divergence due to directional selection. Additionally, our genome-wide association studies on the metabolome for medicinal quality traits identified several candidate genes, such as AlZFP706 and AlAAHY1, exhibiting significant correlations with atractylodin and hinesol levels, respectively. Overall, this study provides an intricate genomic resource for A. lancea, thereby expanding our understanding of the effect of natural variation on metabolites and facilitating the genetic improvement of its medicinal properties.