bluuebunny/crossref_metadata_2025 huggingface dataset:
Precipitation strengthening behavior of Custom 455 stainless steel during tempering at 420 °C
Authors: Chen Jing , Sun Guangyan , Zhang Liqin , Liu Wenqing , Xiong Xiangyuan
Published: October 2024

After solid solution at 850 °C, the Custom 455 was aged at 420 °C for different times. The hardness changes were measured using a Vickers hardness tester, and the microstructure and composition of the second phase were studied using atom probe tomography (APT) and high-resolution transmission electron microscopy (HRTEM). The APT results indicate that in the early stage of aging, Cu atoms first segregate and attract Ti to form CuTi clusters; As the aging time increases, Ti atoms in CuTi clusters attract Ni and form CuTiNi clusters, resulting in a rapid increase in sample hardness; Subsequently, CuNiTi clusters grew and gradually separated into Cu-rich and NiTi-rich particles; As the aging time further increases, some NiTi-rich particles grow into rod-shaped Ni3Ti precipitates, while others have Si atoms and grow into spherical G phase particles. The orientation relationship between Cu-rich phase, Ni3Ti phase, and G phase is: [100]M//[0–11]Cu//[-12–10]Ni3Ti//[100]G, (011)M//(111)Cu//(0004)Ni3Ti//(022)G. The formation of the Cu-rich, Ni3Ti, and G phase resulted in a hardness peak of 538 HV after 16 h of aging. Subsequently, the decrease in hardness caused by the coarsening of the Cu-rich and Ni3Ti particles was offset by the newly formed G phase, resulting in a slow decrease in hardness.
TIG assisted surface modification of Ti-6Al-4V with B4C, SiC particles
Authors: Pandey Neetesh Kumar , Kumar Sunil , Anant Ramkishor
Published: October 2024

This research article assesses the improved hardness and wear behaviour of Ti–6Al–4V (Titanium-6Aluminium-4Vanadium) ex-situ produced composite case on its surface by TIG Arcing. This method is recognized for its potential to modify the surface of various metallic substrates by carefully controlling the melting and solidification of the substrate using a significantly less expensive high density electric arc heat source of the widely used autogenous (without filler) gas tungsten arc welding (GTAW) process.The molten base and the hard particles in the applied coating through reinforcement led to the development of hard surface characteristics in the Ti-6Al-4V surface matrix. The hard particles that have been reinforced by using TIG arcing to develop a hard wear-resistant surface coating are boron carbide (B4C) and silicon carbide (SiC). The presence of hard particles on the surface of Ti64 has been verified by XRD Pattern and EDS examination. The effect of different reinforced particles on the wear behaviour as well as the hardness of the modified surface has been studied by comparing the Ti64 modified surface without reinforcement and the as-built Ti64 surface samples. Vickers micro hardness testing measures the hardness of the modified particulate surface composite and demonstrates a significant increase in hardness, ranging from 1.5 to 2 times that of the base metal and wear tests confirm that the surface-coated samples of B4C and SiC on the base metal, showed a reduction in wear rate of approximately 55% and 45% respectively, compared to the base metal.
Capturing the Prevalence, Patterns, and Predictors of Supportive Relationships in Early Adolescence
Authors: Hwang Sophia H. J. , Cappella Elise , Kieffer Michael J. , Seidman Edward
Published: October 2024

Guided by self-determination theory and the bioecological model, this latent class analysis explores the patterns and predictors of supportive relationships in a national sample of early adolescents ( N = 6,469). A six-class solution emerged: youth with (1) emotional, informational, and academic support from various adults and peers across home, school, and community settings; (2) emotional and informational support from school friends; (3) low support; (4) emotional, informational, and academic support from parents and school friends; (5) emotional and informational support from out of school friends, and (6) emotional and informational support from family. Multinomial logistic regression results indicate the unequal distribution of relational support was predicted by individual, home, or school characteristics: being female, extracurricular participation, and higher socioeconomic home or school contexts were associated with membership in classes with a pattern of greater relational support in comparison to the low support class. The importance of targeting subgroups of adolescents in need of relational support and enhancing home and school settings are discussed.
Micro-structure-property relationship of heavily drawn steel wires for large span suspension bridge cables
Authors: Zhou Jie , Hu Chengyang , Zhu Xiaoxiong , Hou Tingping , Cheng Lin , Hu Feng , Xue Huajuan , Zhao Jun , Wu Kaiming
Published: October 2024

The outstanding combination of high strength and ductility of bridge cable steel wire is attributed to the cold drawing process with intermediate equivalent strain. However, the micro-structure-property relationship of heavily drawn steel wires for large span suspension bridge cables is not well understood. In this study, defects-controlled deformation in nano-scale interfaces between ferrite and cementite phases with heavily cold drawing process was investigated using high-resolution transmission electron microscopy and molecular dynamics simulation. The excessive thinning of the cementite lamellar thickness observed from the morphology suggested the evolution of the Fe3C/Fe interface in the cold-drawn wires, namely, the partial cementite deformation during the drawing process. Drawing strain played a major role in the occurrence of partial cementite nano-crystallisation. This was because the change in cementite morphology was the primary cause of cementite free energy increase, which ultimately led to cementite phase instability. The decrease of yield strength during the drawing process of the bridge cable steel wire was caused by the inverse Hall-Petch effect resulted from the nodule rotation. When the nodule morphology became flat, the inverse Hall-Petch effect was suppressed. At this time, the strengthening mechanism caused by cementite nano-crystallisation ensured the improvement of tensile strength of steel wire when the dislocation density was close to saturation.
Sintering behaviours of different ladle filler sands with high-chromium stainless steel
Authors: Yuan Kang , Deng Zhiyin , Zhu Miaoyong
Published: October 2024

In order to investigate the sintering behaviours of different types of filler sands (chromite-based, zircon-based, and silica-based) with high-chromium stainless steel grades ( w[Cr] = 11.70% and 16.26%), laboratory experiments were carried out at 1600°C in an inert atmosphere. It is found that the high content of Cr in stainless steel promotes the formation of Cr2O3 in the liquid phase of these sintered filler sands, thereby significantly affecting the sintering of the filler sands. Compared with the elements of Mn and Al in conventional steel grades, the Cr element in stainless steel shows a different impact on the sintering of filler sands. The sintering of chromite-based sands is restricted by the rise of Cr content in stainless steel, whereas the dissolved Cr in the steels enhances the sintering of zircon-based and silica-based filler sands. Chromite-based filler sands are recommended for stainless steel. Because the melting point of the liquid phase is significantly influenced by the content of (Cr2O3 + Al2O3), the contents of Al2O3 and Cr2O3 in chromite-based sands should be accordingly adjusted for stainless steel.
Study of Li2O reduction in mould slag for continuous casting of low-carbon steel slab
Authors: Wu Xiaoxiao , Cao Yan , Wang QiangQiang , He Sheng-ping
Published: October 2024

The addition of Li2O increases production costs for continuous casting, despite its enhancement of the melting and flow properties of mould slag. Initially, laboratory research focused on assessing the individual impacts of Li2O, F, Na2O and Al2O3 on the viscosity and melting temperature of the slag, using a basicity of 0.95. Subsequently, four stages of industrial testing were conducted to optimise the slag, evaluating parameters such as temperature and friction force curves of the mould copper plate thermocouple, steel slag consumption per ton and strand surface quality. The optimised slag achieved a basicity of 0.98, a viscosity of 0.29 Pa·s and a melting temperature of 1115 °C, meeting all performance requirements for low-carbon steel mould slag. Compared to the original flux, the mass percentage of Li2O decreased significantly from 1.54 to 0 wt-%, while Na2O increased from 2.36 to 7.35 wt-%, and Al2O3 decreased from 7.28 to 3.49 wt-%. The operation of the optimised flux remained stable, with smooth fluctuations observed in the mould copper plate thermocouple temperature and friction force curves. These research findings hold significant reference and practical value for further development and application.
Vanadium extraction from vanadinite and high carbon v-bearing stone coal by coupling reduction smelting and oxalic acid hydrothermal leaching
Authors: Yu Li , Li Youyu , Liu Jiaofeng , Yang Mengying , Zou Min , Tang Chenchuanrui , Liu Dongli , Peng Lisi
Published: October 2024

Vanadinite and high-carbon vanadium-bearing (V-bearing) stone coals are important vanadium sources widely used in vanadium extraction. The traditional sulfuric acid leaching method for extracting vanadium consumes a large amount of acid, wastes significant amounts of lead and carbon, and causes serious environmental pollution. This study discusses the integration of reduction smelting and oxalic acid hydrothermal leaching for processing vanadinite and high-carbon V-bearing stone coals. Specifically, high-carbon V-bearing stone coal is selectively added to vanadinite to produce coarse lead blocks and V-bearing slag during reduction smelting. Then, the oxalic acid hydrothermal leaching process is employed to extract vanadium from the V-bearing slag. This approach reduces the waste of lead and carbon resources and achieves co-extraction of vanadium from both V-bearing minerals. The results show that when the mass ratio of high-carbon V-bearing stone coal to vanadinite is 25%, and smelting is conducted at 1150°C for 15 min under argon protection, a separation efficiency of 90.67% for metallic lead and V-bearing slag is achieved, the grade of V2O5 in vanadium slag is 12.37%, and the recovery rate is 95.64% by ICP-OES analysis. Furthermore, the leaching rate of vanadium in the V-bearing slag can reach 85.34% via oxalic acid hydrothermal leaching under conditions of a leaching temperature of 100°C, a leaching duration of 30 min, an oxalic acid concentration of 25 wt%, a liquid-to-solid ratio of 10:1 mL/g, and a stirring speed of 500 rpm. The integration of reduction smelting and oxalic acid hydrothermal leaching offers benefits such as improved resource utilization, waste reduction, cost savings, and environmental enhancements. Thus, the findings of this research can serve as references for the vanadium extraction processes of related vanadium-containing minerals.
Studying and analysis of deformation and stresses in horizontal-axis wind turbine using fluid-structure interaction method
Authors: Nebiewa Ahmed M. , Abdelsalam Ali M. , Sakr Ismail M. , El-Askary Wageeh Ahmed , Abdalla Hassan Awad , Ibrahim K.A.
Published: October 2024

Fluid-structure interaction (FSI) studies have become an important tool in the development of wind turbine blades as well as for analyzing and optimizing Horizontal Axis Wind Turbine (HAWT). The most essential elements for estimating the turbine blade strength to withstand extreme wind loads and aerodynamic performance are the blade deformation and the associated stresses. This study aims to compare the strength and analyze the deformation behavior of two models of HAWT blades. A three-dimensional model was created and loaded into a Finite Element (FE) model for analysis. The Computational Fluid Dynamics (CFD) investigation was coupled with the structural model using one-way FSI. In this article, the effect of the aerodynamics on the blade surface of a small HAWT has been studied numerically and experimentally. The airfoil used for the blade profile is S826 airfoil. To provide an appropriate displacement for static measurements, the blade in the experimental investigation is made of thermoplastic polyurethane material (TPU). It is noted that the current experimental findings verify the simulation results, and a comparison between the simulations and the experimental findings reveals a reasonable agreement. The numerical simulations are also implemented on a HAWT epoxy E-glass unidirectional (EEGUD) material. It can be concluded from this study that the blade deformation and stress on the blades are related to the wind speed. The deformation along the span length exhibits nonlinear variation that gradually increases from the blade root and reaches its maximum at the blade tip position. The tip deflection and equivalent stress were found to increase with an increase in wind speed. The dynamic analysis at different tip speed ratios shows the highest deformation at λ = 4, for wind speed of 20 m/s.
Libraries’ environmentally sustainable practices and services in California, Florida, and Georgia
Authors: Ren Xiaoai
Published: October 2024

This article reports findings from an exploratory survey study of library workers in California, Florida, and Georgia on their observations of libraries’ environmentally sustainable practices and services, and their perceptions of libraries’ roles and challenges in promoting environmental sustainability in the community. Findings from this study show that the most common environmentally sustainable practice in these libraries is to reduce, reuse, and recycle (3Rs). The respondents view libraries as primarily the information providers and educators on environmental sustainability. Lack of money, time, and community buy-in as well as the risk of being perceived as politicizing the topic are the top challenges faced by libraries when promoting environmental sustainability in the community, followed by the competing priorities faced by the libraries as well as the lack of expertise. Findings from this study contribute to the continuous effort to systematically study this topic and to identify the support libraries need to promote environmental sustainability in the community effectively.
Procognitive Effects of Adjunctive D-Cycloserine to Intermittent Theta-Burst Stimulation in Major Depressive Disorder: Effets procognitifs de la D-cyclosérine en traitement complémentaire par la stimulation thêta-burst intermittente dans le trouble dépressif caractérisé
Authors: DeMayo Marilena M. , Cole Jaeden , Sohn Myren N. , Bray Signe L. , Harris Ashley D. , Patten Scott B. , McGirr Alexander
Published: October 2024

Objective

Major depressive disorder (MDD) is associated with cognitive impairments that persist despite successful treatment. Transcranial magnetic stimulation is a noninvasive treatment for MDD that is associated with small procognitive effects on working memory and executive function. We hypothesized that pairing stimulation with N-methyl-D-aspartate (NMDA) receptor agonism would enhance the effects of stimulation and its procognitive effects.

Method

The effect of NMDA receptor agonism (D-cycloserine, 100 mg) on cognitive performance was tested in two randomized double-blind placebo-controlled trials: (1) acute effects of in the absence of stimulation ( n = 20 healthy participants) and (2) a treatment study of individuals with MDD ( n = 50) randomized to daily intermittent theta-burst stimulation (iTBS) with placebo or D-cycloserine for 2 weeks. Cognitive function was measured using the THINC-it battery, comprised of the Perceived Deficits Questionnaire, the Choice Reaction Time, the Trail Making Test, the Digit Symbol Substitution Test, and the 1-Back tests.

Results

D-cycloserine had no acute effect on cognition compared to placebo. iTBS + D-cycloserine was associated with significant improvements in subjective cognitive function and correct responses on the 1-Back when compared to iTBS + placebo. Improvements in subjective cognition paralleled depressive symptoms improvement, however 1-Back improvements were not attributable to improvement in depression.

Conclusions

An intersectional strategy pairing iTBS with NMDA receptor agonism may restore cognitive function in MDD.
Experiential Narratives in Marketing: A Comparison of Generative AI and Human Content
Authors: Wen Yingting , Laporte Sandra
Published: October 2024

As generative AI technologies advance, understanding their capability to emulate human-like experiences in marketing communication becomes crucial. This research examines whether generative AI can create experiential narratives that resonate with humans in terms of embodied cognition, affect, and lexical diversity. An automated text analysis reveals that while reviews generated by ChatGPT 3.5 exhibit lower levels of embodied cognition and lexical diversity compared with reviews by human experts, they display more positive affect (Study 1a). However, human raters struggle to notice these differences, rating half of the selected reviews from AI higher in embodied cognition and usefulness (Study 1b). Instances of hallucination in AI-generated content were detected by human raters. For social media posts, the more sophisticated ChatGPT 4 model demonstrates superior perceived lexical diversity and leads to higher purchase intentions in unbranded content compared with human copywriters (Study 2). This research evaluates the performance of large language models in generating experiential marketing narratives. The comparative studies reveal the models’ strengths in presenting positive emotions and influencing purchase intent while identifying limitations in embodied cognition and lexical diversity compared with human-authored content. The findings have implications for marketers and policy makers in understanding generative AI's potential and risks in marketing.
Mapping the landscape of front door frailty in the United Kingdom: Lessons for further afield
Authors: Burn Elinor , Armstrong Amy , Offord Natalie
Published: October 2024

The ageing global population is posing a significant challenge to healthcare systems worldwide. Healthcare needs have become more complex and the demand for services is ever increasing. Identification of frailty at the front door of hospitals can prompt comprehensive geriatric assessment and streamline patients to the most suitable clinical area. The United Kingdom has set a priority to develop front door services given the pressure on the National Health Service. A British Geriatrics Society survey has demonstrated that the majority of frailty assessments occur in the emergency department using the Clinical Frailty Scale. This survey prompted the creation of the setting up services guide and its key principles using a collaboration of experience from across the country. Understanding the systems that already exist and creating a network to enable a flow of care towards community teams is crucial to the successful provision of modern frailty attuned care.
Overcoming Challenges to Adopting Smoke-Free Multi-Unit Housing Policies in a Large U.S. Metropolitan Area: Insights and Recommendations From Affected Groups in 20 Los Angeles County Cities
Authors: Marshall Lia W. , Chavez-Sosa Gladis , Gorham Gallow Tonya , Jovelle Claude , Fischbach Lori , Dang Andy , Guglielmo Dana , Holmes Aimee , Kuo Tony
Published: October 2024

Purpose

Community members and non-academic partners (“affected groups”) were asked to identify factors that can influence public support, impede adoption, and mitigate challenges related to adopting local smoke-free multi-unit housing policies.

Approach

A series of key informant interviews were conducted with affected groups from a large U.S. metropolitan area.

Setting

20 cities in Los Angeles County without a smoke-free multi-unit housing ordinance.

Participants

Interviewees were recruited from affected groups with knowledge about their community’s civic and political landscape (n = 63).

Method

Data were collected and analyzed using thematic analysis to identify, code and compare themes.

Results

Most interviewees indicated civic groups, those who do not smoke, and/or groups who are educated about the negative health effects of secondhand smoke exposure would be more likely to support smoke-free multi-unit housing policies. Interviewees reported several challenges to policy adoption, including competing city priorities, public disengagement, and the cost and social burden of enforcing these ordinances. To overcome them, interviewees recommended working synergistically with local governments to build diverse coalitions, educate the public, and develop clear enforcement plans.

Conclusion

Insights and recommendations from affected groups in 20 U.S. cities suggest that communicating with the public and priming impacted communities to support smoke-free multi-unit housing policies are promising interventions for protecting at-risk families from secondhand smoke exposure in their homes.
Peritoneal dialysis-related peritonitis due to Pasteurella multocida in Australia
Authors: Ingham Isabelle , Jose Erin , Burgess James , Cuthbertson Laura , Jose Matthew D.
Published: October 2024

Domestic animals are common in Australian households; however, there is little research into the potential risks these animals pose to patients undergoing in-home peritoneal dialysis (PD). Cats and dogs are known to carry many potential pathogens, including Pasteurella multocida. We reviewed the ANZDATA Peritoneal Dialysis Peritonitis Registry for cases of peritonitis due to Pasteurella multocida between 2011 and 2023. Cases identified were younger and more likely to be female compared with the Australian PD population who developed peritonitis due to other organisms. Of the total 32 episodes, 75% were using automated PD with glucose-based solutions. Two cases requiring removal of the PD catheter and transfer to haemodialysis and no deaths were reported. Whilst outcomes were largely favourable, it is likely that many of these cases could have been prevented. Education for people undergoing PD should include information about the potential infectious hazards of domestic animals.
Bridging the Literacy Gaps: Examining the Impact of the Morphoread Intervention on the Reading Achievement of Children From Low SES Backgrounds
Authors: Vaknin-Nusbaum Vered
Published: October 2024

This study examined an intervention program designed to enhance reading comprehension among struggling readers from low socioeconomic backgrounds by improving their understanding of word structure and meaning. Delivered by college education students, the program targeted second-grade students. Change scores in morphological awareness (MA), reading, spelling measures, and reading motivation were compared among the intervention group, a school-based support group, and typical readers. Results showed academic improvements across all groups. Differences were noted in MA and reading measures, with both struggling reader groups showing higher improvement in word reading tests than typical readers. The intervention group outperformed the school-based group in orthographic word recognition, reading comprehension, spelling, and MA. No significant differences were found in reading motivation change scores. However, the intervention group showed better overall improvement in reading and language measures and self-concept as a reader. Findings highlight the importance of MA in enhancing lexical representations and reading acquisition.
Bridging the gap: Analyzing skill demands in Kuwait’s electrical engineering job market to enhance employability of graduates
Authors: Nadeem Muhammad , Oroszlányová Melinda , Lushi Ardit , Farag Wael A
Published: October 2024

The rising number of unemployed engineers in Kuwait is a concerning trend, largely stemming from a mismatch between the skills worked on in university and the expectations of employers. The present research seeks to address this issue by examining the skill demands within the electrical engineering sector of Kuwait’s job market. Through a comprehensive analysis of over 128 job listings gathered for 6 months in 2023 from various online platforms, this study aims to pinpoint the key competencies sought by employers to enhance engineers’ employability. By bridging this gap between academia and industry, our recommendations aim to inform curriculum adjustments, enabling educational institutions to tailor engineering programs to meet national workforce needs effectively. This study’s insights are not only valuable to academia but also extend to human resources consultants and recruiters, offering crucial insights into the specific skill sets sought by employers in Kuwait’s engineering sector.
Exploration of micro-miniature venturi pump for continuous glucose monitoring through interstitial fluid (ISF) extraction
Authors: Gavali Sachin Ramchandra , Prashant M Pawar
Published: October 2024

Interstitial Fluid (ISF) is a naturally occurring body fluid that surrounds cells and tissues and contains certain markers useful for continuously monitoring glucose levels in the blood without constantly extracting it. Miniaturizing can reduce its cost and timescale. In this study, for continuous glucose monitoring the numerical analysis of a Polymethyl methacrylate (PMMA) based Micro-miniature venturi pump was carried out to extract Interstitial Fluid (ISF). The numerical study was carried out using COMSOL Multiphysics software by employing the k-ε turbulence model to obtain output as a vacuum at the throat of the pump. The micro-miniature venturi pump was numerically analyzed for several key parameters, including the dimensions of the throat, the convergent angle, and the divergent angle. This study obtained a minimum pressure of 49.41 kPa numerically and 70 kPa experimentally when an input pressure of 252 kPa of compressed air was given to the system. Further influence of turbulence kinetic energy and turbulence dissipation rate on throat pressure output have been notified. Notably, the pressure output reaches its minimum value of 49.41 kPa when the turbulent kinetic energy and the turbulent dissipation rate reach maximum values of 5.0 × 109 m2/s3 and 7000 m2/s2 respectively. As per the previous research findings, for continuous glucose monitoring through ISF extraction, a pressure level of 95 kPa is deemed adequate hence the designed micro-miniature venturi pump is suitable for this application.
Nonlinear vibration analysis of multi-support oil-tank system in aero-engine based on asymptotic methods
Authors: Zhu Qingyu , Zhao Yulai , Zhai Jingyu , Yang Xiaodong , Han Qingkai
Published: October 2024

This article is primarily focused on the complicated nonlinear vibration behavior of an aero-engine lubricating oil-tank system with multiple nonlinear pedestals. First, the rubber damping ring’s nonlinear factors are introduced into a cubic nonlinear dynamic model of lubricating oil-tank system. The nonlinear system parameters are identified by testing a simplified aero-engine lubricating oil-tank structure. Then, the nonlinear dynamic model is solved via asymptotic approach, and results are confirmed using Runge-Kutta numerical analysis approach. The system’s vibration responses and amplitude-frequency curves are also acquired, and influence of system parameters on nonlinearity is analyzed. Finally, an experimental investigation on the simplified oil-tank is performed. The nonlinear vibration characteristics of the rubber damping ring and its vibration reduction mechanism are verified using vibration transmissibility. The experimental results are consistent with numerical results. This paper’s recommended analysis approach has engineering significance for vibration and noise reduction design of aero-engine components.
Optimization-based trajectory planning for reconfigurable unmanned vehicle units with multi-steering modes during the reconfiguration process
Authors: Cen Hangjie , Ni Jun , Luo Ying , Yang Xu , Ma Minghao , Wang Tiezhen , Deng Zhangzhen
Published: October 2024

Reconfigurable unmanned vehicle unit (RUVU) exhibits three distinct steering modes: Ackermann steering, Diagonal steering, and In-Situ steering. This arises from its capacity for All-Wheel-Independent-Steering (AWIS) and All-Wheel-Independent-Driving (AWID). Given its unique motion characteristics, there is currently a lack of established methods to assist a RUVU in autonomously planning trajectories. In response to this deficiency, this paper proposes the Multi-Steering Modes Trajectory Planning algorithm (MSMTP) based on the framework of optimal control problem (OCP). The approach innovatively formulates the kinematics and Steering-Mode-Switch theory for vehicles with multi-steering modes. Additionally, a safe traveling corridor (STC) is implemented to guarantee non-conflicting interaction with the surrounding environment. Ultimately, the Bonmin solver is utilized to derive optimal results. Our findings demonstrate the effectiveness of the proposed algorithm in RUVU’s trajectory planning. When comparing the trajectory of RUVU to that of a vehicle only with Ackermann steering, the results also reveal that RUVU has the advantage of reaching its destination in a shorter time, especially in narrow environments.
Traffic flow parameter estimation for complex environments based on improved YOLOv8
Authors: Ai Wenhuan , Zeng Jingming , Lei Zhengqing , Li Danyang
Published: October 2024

Estimation of traffic flow parameters based on computer vision is still a very popular challenge. In particular, the detection problems such as occlusion, small targets, luminance variations, and lighting jitter, etc., are caused by dense traffic scenes and complex weather conditions. Previous studies about detecting and tracking methods focused on daytime and nighttime or single weather condition, but the performance of this model will decline dramatically due to complex conditions. In this paper, a framework for estimating traffic flow parameters in complex environments is presented, in which Ghost-YOLOv8 vehicle detection model is proposed. GhostConv is used to replace part of Conv and a new C2fGhost module is designed to replace part of C2f, reducing the number of parameters and improving the detection performance of the model; The global attention mechanism module is added to the neck network, which strengthens the semantic and location information in the features and improves the model’s ability of feature fusion; In view of the loss of semantic information caused by different scales in detecting small targets, a small target detection layer is added to enhance a combination of deep and shallow semantic information; The GIoU bounding loss function is used instead of the original loss function, which improves the performance of the network’s bounding box regression. Then, combining DeepSORT tracking algorithm and virtual line counting method, the proposed framework estimates traffic flow parameters, including volume, speed, and density in complex environments. The experimental results show that compared with the original model in the UA-DETRAC dataset, the improved YOLOv8 model’s the accuracy is increased by 1.4%, and the parameter number and model size are reduced by 0.229G and 0.2MB respectively. In addition, the framework has good robustness, reaching 97.56% accuracy when estimating average traffic flow parameters. It is sufficient to overcome complex weather conditions and effectively help control traffic for intelligent transportation systems and traffic management to provide good data support. In conclusion, it shows that the model can reduce the number and size of model parameters and improve the detection precision as well as meeting the requirements of edge computing devices and having better real-time performance, so it has practical application value.
On magnetohydrodynamics free convective flow within coaxial cylinder due to nonlinear thermal radiation in an isothermal/isoflux condition
Authors: Isah Bala Y , Abubakar Zainab D , Usman Halima
Published: October 2024

A theoretical exploration was reported to highlight the electrically viscous conducting fluid within a coaxial cylinder. Both the outer surface of the inner cylinder and the inner surface of the outer cylinder were porous, heated, and cool, respectively. The action of a simultaneous radial transverse magnetic field and velocity slip were imposed across the coaxial cylinder. For appropriate insight into the physical problem, the thermal Rosseland diffusion approximation was used to indicate the radiative heat flux in the energy equation. The aim is to investigate the effects of isothermal and isoflux conditions on slip-upshot heat transfer in a vertical coaxial cylinder due to nonlinear thermal radiation. The steady-state and unsteady solutions of the physical problem were provided and solved via regular perturbation and implicit finite different domains, respectively. It was noted that the magnetic and suction parameters reduced the fluid velocity and skin friction under both isothermal and isoflux conditions. Conversely, the Grashof number, thermal radiation, and injection parameters increased the fluid velocity, fluid temperature, and skin friction, with a more significant effect observed under isothermal conditions on the surfaces of the coaxial cylinder. Additionally, the sensitivity analysis revealed that the radiation parameter is highly sensitive under isothermal conditions, followed by the temperature difference parameter. In contrast, under isoflux conditions, the injection parameter shows extreme sensitivity, with the radiation parameter being the next most sensitive. The result reveals an excellent agreement between the analytical and numerical results at maximum time.
Experimental assessment of catalytic biofuel effect on performance and exhaust emission of diesel engine
Authors: Alam Noor , Hasan Zahir , Hasan Nabi , Rahman Najmur , Zaki Sheikh Ahmad , Othman Nor’azizi Bin
Published: October 2024

The present experiment is to analyze the effect of blended biodiesel of chicken fat CF10 (10% chicken fat and 90% diesel), waste cooking oil WC10 (10% waste cooking oil and 90% diesel), and combined chicken fat with waste cooking oil CF&WC10 (5% chicken fat + 5% waste cooking oil and 90% diesel) on the performance of diesel engine. The experiment is conducted at a constant compression ratio of 17, mixing 50 ppm alumina alfa (Al2O3-α) catalyst nanoparticles in each blend. The performance of biodiesel is analyzed at 25%, 50%, 75%, and 100% load conditions and is compared with pure diesel. The results show that the brake torque (BT) and brake power of CF&WC10 were found to be 22.48 Nm and 3.58 kW at full load conditions. However, the indicated thermal efficiency and BTE of CF&WC10 are at full loading conditions of 52.45% and 26.78% respectively. Because the supply of A/F ratio is 18.81, at full load condition and also lowering the brake specific fuel consumption up to 0.32 kg/kWh. Therefore, optimization of both performance and exhaust emission of an engine depends on BTE and NOx as well as HC emissions. Hence, from the emissions reduction point of view, CF&WC10 has lower emissions while achieving brake thermal efficiency similar to diesel fuel. The novelty of research shows CF&WC10 leads to enhanced performance of diesel engine compared to pure diesel fuel.
Why the standard definition of creativity fails to capture the creative act
Authors: Abraham Anna
Published: October 2024

The “standard definition” of creativity holds that a creative idea is one that is novel and useful. This judgement is customarily based on an external frame of reference as it is passed by people who are receiving the idea (the recipient). The internal frame of reference of the person who has generated the idea (the creator) is usually ignored. I make two cases in this paper. First, that employing external frames of reference in assessing creative products has been erroneously applied to understand the creative mind. Second, that any definition of creativity needs to be one that can be reasonably applied whether following an internal frame of reference of the creative experience or an external frame of reference of the creative product. With these aims in mind, I propose the following amendment to the definition of creativity: a creative idea is one that is both novel and satisfying.
Holocene environmental evolution and its relationship with human culture in the Luoyang area, Central China
Authors: Shen Junjie , Lu Peng , Yang Liu , Chen Panpan , Mo Duowen , Wang Hui , Zhang Xiaohu , Liu Tao , Guo Xiaotao , Tian Yan
Published: October 2024

As a key region for the origin and development of Chinese civilization, the relationship between the Holocene environment and human culture in the Luoyang area has garnered significant attention. However, the lack of long-term and multi-factor studies impedes our understanding of the overall characteristics of environmental systems and their interactions with human cultures. Based on extensive field investigations, we conducted a comprehensive study of the BZ profile, which exhibits continuous sedimentation and abundant paleoenvironmental information. The Holocene evolution of climate, deposition, hydrology, and landforms was analyzed, and the human-environment interaction was also examined. The findings demonstrate that the regional Holocene climate also exhibits fluctuations, albeit within a relatively narrow range. The regional sediment was predominantly composed of aeolian loess-paleosols during the early to middle Holocene, while the process of alluviation gradually intensified in the late Holocene. The moderate climatic fluctuations have facilitated the sustainable development of ancient cultures. The intensification of anthropogenic activities may contribute to the increased alluviation during the late Holocene. Ancient humans effectively adapted to this adverse condition by constructing city walls with flood control functions. Our study is significant for enhancing the comprehension of the operational characteristics inherent in human ecological systems.
Subsistence strategies and climate change as key factors in the vicinity of the Great Wall in northern China from 500 BCE
Authors: Jia Xin , Zhang Zhiping , Liang Weihao , Li Enrui , Hu Xiaonong , Lee Harry F
Published: October 2024

Whether, and in what ways, the association between changes in climate and the shifting of imperial frontiers (i.e. the Great Wall) could be mediated by the social responses of major ethnic groups is a question that remains unanswered. Ulanqab is a region in Inner Mongolia associated with a long history of Great Wall construction from the Warring States to the Ming dynasties (~500 BCE–1644 CE) and the Great Wall is often regarded as the boundary of the Central Plains dynasty. This paper uses Ulanqab as a case study to investigate the historical inter-relationship between changes in climate and subsistence strategies on the one hand, and the positioning of the Great Wall on the other. We determined the precise geographical coordinates of the Great Wall in this region during each dynastic period of Chinese history, and compared its location to (1) the empire’s boundaries in each dynasty, (2) evidence that is available on climate change from high-resolution paleo-climate reconstructions and (3) subsistence strategies (whether agriculture, pastoralism, or nomadism) that people adopted as recorded in historical documents. Geo-referenced information from associated archaeological sites was also used to determine the extent of habitation in different areas. We found that during the period of agriculturalist empires (the Han and Ming dynasties), the Great Wall was a frontier between farming and animal husbandry, and was located to the south of the Daqing Mountains. In contrast, during the period of pastoralist empires (the Zhao Kingdom [of the Warring States], Northern Wei and Jurched Jin periods), the Great Wall was the frontier between animal husbandry and nomadism, and was located to the north of the Daqing Mountains. These mountains (42.5°N) seem to have been the northern limit of human settlements that were based on animal husbandry and farming. We observed that, when precipitation and temperature increased, this resulted in an augmentation of agricultural production that most likely facilitated the northward expansion of the agriculturalist peoples. A decrease in precipitation, on the other hand, resulted in the shrinkage of pastures and food, triggering a southward expansion that was characteristic of the pastoralist peoples. This study attempts to provide new insights into the interrelationships among changes in climate, human societies and geopolitics in Chinese history.
Exogenous Mitochondrial Transplantation Facilitates the Recovery of Autologous Nerve Grafting in Repairing Nerve Defects
Authors: Li Dongdong , Liu Haolin , Li Chaochao , Guan Yanjun , Xiong Xing , He Ruichao , Jia Zhibo , Liang Lijing , Zhao Jinjuan , Miao Xinyu , Wang Yu , Peng Jiang
Published: October 2024

Autologous nerve transplantation (ANT) remains the gold standard for treating nerve defects. However, its efficacy in nerve repair still requires improvement. Mitochondrial dysfunction resulting from nerve injury may be a significant factor limiting nerve function restoration. This study investigated the impact of supplementing exogenous mitochondria (EM) in ANT and explored its effect on the efficacy of ANT in nerve repair. SD rats were used to prepare a model of a 10 mm sciatic nerve defect repaired by ANT (Auto group) and a model of ANT supplemented with EM (Mito group). At 12 weeks post-operation, functional, neurophysiological, and histological evaluations of the target organ revealed that the Mito group exhibited significantly better outcomes compared with the Auto group, with statistically significant differences ( P < 0.05). In vitro experiments demonstrated that EM could be endocytosed by Schwann cells (SCs) and dorsal root ganglion neurons (DRGs) when co-cultured. After endocytosis by SCs, immunofluorescence staining of autophagy marker LC3II and mitochondrial marker Tomm20, as well as adenoviral fluorescence labeling of lysosomes and mitochondria, revealed that EM could promote autophagy in SCs. CCK8 and EDU assays also indicated that EM significantly promoted SCs proliferation and viability. After endocytosis by DRGs, EM could accelerate axonal growth rate. A sciatic nerve defect repair model prepared using Thy1-YFP-16 mice also revealed that EM could accelerate axonal growth in vivo, with statistically significant results ( P < 0.05). This study suggests that EM enhances autophagy in SCs, promotes SCs proliferation and viability, and increases the axonal growth rate, thereby improving the efficacy of ANT. This research provides a novel therapeutic strategy for enhancing the efficacy of ANT in nerve repair.
Forgiveness and Reconciliation Rituals Practiced in North and Central Gondar Zones of Ethiopia
Authors: Mengstie Missaye Mulatie , Wadende Pamela Akinyi , Ngalim Valentine Banfegha
Published: October 2024

This study explored forgiveness and reconciliation rituals which are practiced in Central and North Gondar Zones of Ethiopia. Most people in these zones live in rural areas, and they practice a patriarchal family system. The study used qualitative interviews to collect data from 10 adults experienced in indigenous conflict resolution practices. The findings of the study identified common types of interpersonal and intergroup conflicts. Identified forgiveness and reconciliation rituals were performed by male adults. These rituals almost always consisted of three phases: pre-forgiveness, forgiveness, and post-forgiveness. The conflict intermediaries always suggested that warring parties create new social relationships such as inter-marriaige to sustain peace. It was evident that these rituals did not observe gender or age equity because female and youth were not included in the processes. This study highlights the implications of peacebuilding, gender equality, and inclusion policy and practices that these rituals hold.
I Have Decided to Read Out Loud for the Rest of My Life! Cognitive Health and the StrongerMemory Program
Authors: Tompkins Catherine J. , Ihara Emily S. , Keese Francesca , Hardy Gergana , Lauber McKenzie , Magee Catherine , Kang Hyun , Barrett Kendall , Pantleay Harveen , Velazquez-Dominguez Vianey , Holden Madeline
Published: October 2024

The StrongerMemory program aims to improve cognitive health in older adults through three daily brain exercises stimulating the prefrontal cortex: reading aloud, writing, and math activities. The brain’s prefrontal cortex governs memory retrieval, decision-making, concentration, planning, insight, and judgment. This paper reports on focus groups conducted to understand participants’ perspectives of the StrongerMemory program and their continuation of the exercises post-study. Thirty older adults, mostly female, white, married, and holding advanced degrees, participated. Rigorous data analysis involving coding, memoing, and constant comparative analysis generated 132 codes leading to the emergence of five themes: motivating, appreciating, taxing, committing, and enhancing. Social work practitioners can gain valuable insights from this study to enhance the creation and implementation of accessible and meaningful brain health interventions for older adults.
Integration of lean manufacturing system with novel intuitive fuzzy syncretic lean frame work to improve the overall equipment effectiveness
Authors: Pimpalkar Rita , Madgule Mahadev
Published: October 2024

Lean manufacturing embraces the principle of doing more with less by removing non-value-added activities from manufacturing processes to preserve effectiveness, flexibility, and profitability. Predictive maintenance in production stages are more critical since it involves machines which are prone to failure and a post failure maintenance stagnates the production which creates bottlenecks due to machine failures. Hence in this work a novel intuitive fuzzy syncretic lean frame work has been implemented to incorporate the need of intelligent systems. The framework is divided into phases which employs Fuzzy logic with embedded smart sensors for effective utilization of man machine and materials in order to improve the effectiveness of a production floor. A novel time based forecasting is done in the design phase which implements the lean tool Takt time. The manufacturing phase uses the sensors to determine the predictive maintenance of the machines thereby implementing continuous flow as the lean tool and the inspection phase uses smart sensor system for real time continuous monitoring of the machining process thereby incorporating Poka-yoke as a lean tool. Thus by implementing the framework the overall equipment effectiveness is achieved which helps in achieving continuous flow of products and defect free products in any production firm.
Adoption is History: Enhancing Counselor Awareness of Adoption as a Legal and Sociocultural Practice
Authors: Bailey Sara W.
Published: October 2024

Understanding cultural history is essential to becoming a culturally responsive counselor. Despite adoptees’ increased risks for negative mental health outcomes, the history of adoption as a cultural and legal practice has been underemphasized in counseling scholarship. This overview of adoption practices from Ancient Babylon through the mid-1970s highlights lasting historical influences on modern adoption practice and the lingering threats to adoptees’ mental health from systemic legal and sociocultural inequities.