bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gyrokinetic analysis of turbulent transport by electromagnetic turbulence in finite β plasmas with weak magnetic shear on HL-2A
Authors: Xu J.Q. , Chen W. , Peng X.D. , Hao G.Z. , Li J.Q. , Qu H.P. , Shi P.W. , He X.X. , Jiang M. , Li Y.G. ,   the HL-2A Team
Published: October 2023

Abstract
Turbulent transport and zonal flow (ZF) dynamics in the mixed kinetic ballooning mode (KBM) and ion temperature gradient (ITG) mode dominated turbulence states are analyzed by gyrokinetic simulations based on the experimental observations of KBMs in the HL-2A Internal Transport Barrier (ITB) plasmas with weak magnetic shear configuration. Results have shown that KBMs and ITGs are the main candidates for turbulent transport and the inclusion of fast ions (FIs) can destabilize both instabilities, which is resulted by the decrease of ballooning parameter αMHD
hence reduced Shafranov shift stabilization due to the negative FI density gradient, making them more unstable according to the ŝ-αMHD
diagram. In addition, the ITGs are suppressed by both dilution and finite-β stabilization effects caused by FIs. Nonlinear simulations excluding the effects of FIs indicate that the transport is minimum at

β
e

=

β
e

exp

as the turbulence predominated by ITGs is strongly suppressed by the nonlinear electromagnetic (EM) stabilization and enhancement of ZFs. However, the transport is further increased with β
e although the ZFs become stronger due to the transition from ITG to KBM dominated turbulence state. The presence of FIs can modify the relation between ZF shearing rate and β
e. The transport level is insensitive to β
e when

β

e

⩽

β

e

exp

but increases significantly because of the KBM destabilization. Meanwhile, the ZF amplitude reaches maximum at

β

e

=

β

e

exp

whereas it suffers an erosion at higher values, implying that the plasma might be a self-organized critical state owning to the interactions among ZFs, KBMs and FI effects hence setting the plasma β around β
exp. The results have also provided a possible explanation that the destabilization of EM turbulence is responsible for the ion heat transport stiffness under weak magnetic shear configurations in the off-axis neutral beam injection heated ITB plasmas on HL-2A.
Numerical simulation of the effect of elastic deformation on the fairing separation process
Authors: Wang Hao , Hong Junwu , Meng Dehong , Li Wei , Yue Hao 
Published: October 2023

Abstract
In view of the potential impact of structural deformation on the separation safety of elastic fairing at low altitude and high speed, the aerodynamic/deformation/motion coupling analysis method is established. The numerical simulation of the separation process of the fairing considering elastic deformation after disengaging is carried out. The motion characteristics and structural response characteristics of the elastic fairing in the separation process are obtained. Moreover, the impact of elastic deformation on the attitude and trajectory of the fairing is studied. The results indicate that the elastic deformation has an impact on the attitude and trajectory of the fairing after hinge decoupling. However, for the calculation conditions in this paper, elastic deformation has no subversive effect on the separation safety.
Numerical Investigation on the influence of meteorological conditions on wind turbine icing
Authors: Zhang Lu , Li Weibin , Tong Ying , Cui Xingda , Ma Shuai 
Published: October 2023

Abstract
Keeping the blade structure and shape in the design condition is the premise and guarantee for efficient operation of wing turbine, but wet and cold climate will lead to icing blade, then the blade shapes were changed and the output power of the wind turbine is reduced. A numerical frame for wind turbine icing was developed in present work, which consists of a numerical method for impingement of water droplets based on the multiple frames of reference and Euler method and a 3D heat and mass transferring method for wind turbine icing, then the effects of several meteorological parameters, including the temperature, Liquid Water Content (LWC), Mean Volume Diameter (MVD) and the inflow velocity, on ice shape of the blade were investigated in the numerical frame. The present method can provide supports for prediction of icing process and aerodynamic characteristic after icing of wind turbine blades.
Influence of hydrodynamic retarder blade angle on vortex structure
Authors: Wang Yuze , Wei Wei , An Yuanyuan , Tao Tianlang , Yan Qingdong 
Published: October 2023

Abstract
The internal flow of the hydrodynamic retarder cavity is a complex three-dimensional turbulent flow, and the evolution of vortices in its internal two-phase flow field is closely related to the generation of braking torque and the dissipation of kinetic energy. In this study, a periodic flow channel model is used to investigate the influence of different blade angles on vortex structure characteristics. The vortex structure identification method with Q criterion is employed to compare and analyze the distribution and development of the vortex structure. Particle image velocimetry (PIV) tests are conducted to observe the evolution of the vortex structure inside the retarder and validate the simulation analysis. Results show that the increase of the vortex structure scale, intensity, and transformation speed caused by the increase of the blade angle, which affects the energy dissipation and transfer of the flow field and explains the reason for the change of the braking torque. This provides a theoretical basis for the study of the braking performance mechanism and design optimization of the hydrodynamic retarder.
Numerical analysis of influencing factors on wave load for an amphibious aircraft
Authors: Gao Xianjiao , Sang Tengjiao 
Published: October 2023

Abstract
Numerical method of wave load for an amphibious aircraft is carried out in this paper, and its effectiveness is verified by comparing with towing tank model test. It shows that at the same wavelength and speed, the aircraft’s wave load is positively correlated with the change of wave height, but with the increase of wavelength, the difference shows a gradually decrease. And wave load is positively correlated with the speed, the greater the speed, the greater the wave load is. The wave load decreases with the increase of the wavelength. The peak load generally occurs in the short wave state of 1.2 times the length of the fuselage. With the increase of the wavelength, the aircraft load gradually decreases.
Effect of normal magnetic field on the exact coherent state of channel flow at large Reynolds number
Authors: Shi Xiaomeng , Li Shunzhi , Li Sen , Wang Lebing , Dong Shuai 
Published: October 2023

Abstract
Laminar-turbulent subcritical transition has been always a hot issue in fluid mechanics. Exact coherent states are important for predicting the path of transition and understanding the cycle of turbulent self-sustaining process. One of the most common methods of investigating subcritical transition is dynamical system method and many different forms of invariant solutions have been obtained in many shear flows. In order to study the effect of magnetic field on the exact coherent state of channel flow at large Reynolds number, the direct numerical simulation combined with bisection method is used to calculate the exact coherent state-periodic orbit solution with different magnetic field strength at Re ⩾ 9000, and the structure and morphology in the flow field are compared. The results show that the magnetic field strength does not change the structure and shape of the solution and the scaling law between the transition threshold and Reynolds number does not change significantly, which shows obviously self-similarity. As the magnetic field strength increases, the period of the exact coherent state decreases and the perturbation energy in each direction exhibits periodical oscillation changes. In addition the shape of the amplitude curve also changes due to the magnetic field effect. The above results show that the magnetic field has a certain inhibition effect on the disturbance at large Reynolds number, and the flow field remains relatively stable.
Advances in Fluid Mechanics: Computing and Mathematical Models, Turbulence, Fluid Theory Applications
Authors: Wei Jiajun , Ouyang Chunfa , Shan Xiaoqian , Gao Qun , Zheng Kangsheng , Luo Wei 
Published: October 2023

Abstract
This paper reviews the application of computing and their mathematical principles in fluid mechanics, turbulence, and fluid mechanics. Specifically, it includes the application of computer software in fluid mechanics, the application of mathematical principles in fluid mechanics, the mathematical model in turbulence, the specific application of turbulence model, the application of fluid mechanics in engineering, and the application of fluid mechanics in simulation technology. The comparison and analysis of the similarities and differences in various applications are made to provide theoretical guidance for the researchers engaged in the research of fluid mechanics.
Aerodynamic characteristics simulation of helicopter rotor in hover using HeliX software
Authors: Cui Xingda , Sun Junfeng , Mou Bin , Ma Shuai , Zhang Lu , Xiao Zhongyun 
Published: October 2023

Abstract
In order to predict hover performance of a new helicopter rotor, the aerodynamic performance and flow field of the rotor in hover is calculated by using HeliX software. The comparison between numerical results and wind tunnel test data of S-76 rotor as a validation case of CFD method demonstrate that HeliX software has the capability to consistently and reliably predict performance parameters for a helicopter rotor. The numerical results of the new rotor in hover suggest that the maximum hover efficiency of the new rotor is about 73% with collective pitch angle of 9.2°, while the shock induced separation and the reattachment phenomenon begin to appear on the upper surface near the blade tip. As the increase of collective pitch angle from 9.2° to 11.2°, hover efficiency decreases significantly due to the serious flow separation near the blade tip. The research in this paper can provide reference and guidance for aerodynamic optimization design of helicopter rotor.
Numerical Simulation of the Influence of Ski-jump Deck on the Take-Off Zone Flow Field Based on CFD
Authors: Tao Sirui 
Published: October 2023

Abstract
Ski-jump take-off is a standard procedure for carrier-based aircrafts, and it is one of the key technologies for the generation of the combat effectiveness of the system. A 3D model carrier with a ski-jump deck is conceptually designed. The airflow field over the carrier is numerically simulated based on CFD. The longitudinal airstream line and velocity distribution, the velocity distributions in normal-wash area, tangential-wash area are derived and the influence of the ski-jump deck on the take-off zone is analyzed. The numerical simulation shows that the body-shedding vortex on both sides of the bow affects the engine intake at Take-off Point 1 and 2 and 3.
Responses of wildfire-induced global black carbon pollution and radiative forcing to climate change
Authors: Liu Xinrui , Ma Jianmin , Zhang Xiaodong , Chen Kaijie , Jian Xiaohu , Tao Shu , Liu Junfeng , Gao Hong , Huang Tao , Zhao Yuan 
Published: October 2023

Abstract
The impacts of climate change on wildfires have been studied extensively. Along with declining emissions from fossil fuel combustion due to anthropogenic emission control, black carbon (BC) released from wildfires is expected to contribute a more significant portion to its atmospheric burden. However, from a global perspective, little is known about the BC burden and radiative forcing caused by wildfires. Here, we report the results from the long-term wildfire-induced BC concentration and direct radiative forcing (DRF) from 1981 to 2010 globally simulated by an Earth System Model using an updated wildfire BC emission inventory. We show that wildfire-induced BC concentration and DRF varied significantly spatially and temporarily, with the highest in sub-Saharan Africa, attributable to its highest level of wildfire BC emission worldwide. The temporal trends of near-surface air temperature, precipitation, and evapotranspiration and their association with wildfire-induced BC concentration are explored using the multidimensional ensemble empirical mode decomposition. A statistically significant relation between changes in climate parameters and wildfire-induced BC concentration was found for 53% of the land grid cells, explaining on average 33% of the concentration variations. The result suggests that the wildfire-induced BC DRF, with an increasing trend, would be an important contributor to climate change, especially in sub-Saharan Africa. Occurrences of wildfires in the Amazon Basin respond most strongly to climate change and play an increasingly important role in changing the global climate.
Tristochastic operations and products of quantum states
Authors: Bistroń Rafał , Śmiałek Wojciech , Życzkowski Karol 
Published: October 2023

Abstract
The notion of convolution of two probability vectors, corresponding to a coincidence experiment can be extended to a family of binary operations determined by (tri)stochastic tensors, to describe Markov chains of a higher order. The problem of associativity, commutativity, and the existence of neutral elements and inverses for such operations acting on classical states is analyzed. For a more general setup of multi-stochastic tensors, we present the characterization of their probability eigenvectors. Similar results are obtained for the quantum case: we analyze tristochastic channels, which induce binary operations defined in the space of quantum states. Studying coherifications of tristochastic tensors we propose a quantum analogue of the convolution of probability vectors defined for two arbitrary density matrices of the same size. Possible applications of this notion to construct schemes of error mitigation or building blocks in quantum convolutional neural networks are discussed.
Overview of the Decarbonization Options for the Electricity Sector: Opportunities and Challenges
Authors: Triani M. 
Published: October 2023

Abstract
The energy demand has grown alongside increasing population growth globally. Unfortunately, the utilization of fossil fuels, especially coal, has dominated the energy sectors, including power generation. Fossil fuels have no place in the sustainability future due to the limitation of these resources and the potential environmental impacts that may arise. Therefore, the decarbonization of the electricity sector has recently become the world’s attention, including in Indonesia. This study discusses opportunities and challenges of decarbonization initiatives in the electricity sector by conducting traditional reviews of various publications from direct science databases and publications from official websites of other organizations relevant to the research context. The results discuss decarbonization options by replacing coal with renewable energy. Other initiatives are also investigated in this paper to provide alternative possibilities. The study indicated that each option has challenges that can affect the success of each program.
Environmental sustainability: insight into paperless policy and integrated audit internal system
Authors: Khafid M , Suryandari D , Hidayah R , Dahlan T A , Husna D R , Kayati I N 
Published: October 2023

Abstract
Universitas Negeri Semarang (UNNES) is one of the higher education institutions with legal status in Indonesia that has launched conservation. Therefore, every program implemented must be based on environmental preservation. This research examines the relationship between paperless policy and the internal audit system on environmental sustainability. The research method uses primary data and secondary data. Data analysis applies a comprehensive descriptive analysis. The results showed that applying a paperless policy at UNNES reduced the amount of paper used. In addition, an integrated internal audit system can reduce paper use. The existence of an internal audit system that all units can access via the Internet can reduce paper usage figures. This non-corrosive use policy has been able to participate in preserving the environment. Hence, applying a paperless policy accompanied by providing integrated internal audit system facilities can maintain environmental sustainability.
The impact of green innovation and environmental reporting on corporate performance
Authors: Widiatami A K , Jati K W , Astuti D P , Nurkhin A 
Published: October 2023

Abstract
This study investigates the effect of green innovation and environmental disclosure on firm performance related to consumers and shareholders. This study uses sales growth to see firm performance related to consumers and market value added (MVA) calculations related to shareholders. We obtained a sample of 54 food and beverage industry companies listed on the Indonesia Stock Exchange (IDX) based on the purposive sampling technique. The food and beverage industry was chosen to sample this study because it is one of Indonesia’s most significant contributors to waste. This study uses path analysis panel data and the Sobel test to test the hypothesis. The test results show that green innovation significantly positively affected sales growth, while environmental reporting negatively affected. Firm size as a control variable positively affects MVA. In addition, sales growth does not indirectly affect the relationship between green innovation and environmental disclosure to MVA. This study shows that consumers are more interested in companies that engage in actual action through green innovation to reduce environmental damage. At the same time, the shareholders do not pay attention to the company’s environmental activities.
Determinants of Indonesian MSMEs’ Green Investment Choices Towards Inclusive and Sustainable Economic Growth
Authors: Prihastiwi D. A. , Fatimah A. N. , Nurcahya Y. A. 
Published: October 2023

Abstract
MSMEs are catalysts for economic growth in both rural and urban areas. In light of this, MSMEs should have equitable access to the numerous resources required for their innovation. However, environmental sustainability should also be considered with these developments. Therefore, it is necessary to conduct a study on the factors that influence MSMEs’ selection of green investments. This study analyses whether financial literacy and financial behaviour could determine the green investment choices in micro, small and medium enterprises (MSMEs). Data collection in this study used a survey technique for MSMEs in Magelang and received 195 respondents. Data was then analysed using multiple regression analysis. The results show that positive financial behaviour is related to more sound green investment decisions of MSMEs owners. In addition, this study also finds educational background influences the selection of MSMEs green investments. Financial behaviour can have an impact on investment innovation because MSMEs owners who pay more attention to their financial position will be able to manage risk tolerance better, so they are more attracted to more green investments. The results of this study will corroborate previous research showing that individuals with greater financial behaviour make reasonable financial decisions based on their risk preferences
Analyzing enviromental management accounting to increase university awareness towards sustainability
Authors: Mahmud Amir , Susilowati Nurdian , Sari Puji Novita , Herdiani Aulia 
Published: October 2023

AbstractCurrently, universities are concerned about environmental issues and their impacts. As a university with a conservation perspective, Universitas Negeri Semarang plays a significant role in solving environmental problems. This study explores environmental management accounting (EMA) practices and the motivations for their use in universities. The focus was on waste management, energy, and climate change. Qualitative content analysis was used in this research with the main source of the UI Green Metrics document and in-depth interviews with the head of the Conservation Technical Implementation Unit and its divisions. The results show that the two categories support environmental management accounting. Both energy and climate change contributed 21% to the EMA, and waste management accounted for 18%. Energy and climate change include energy-efficient appliance usage, smart building implementation, number of renewable energy sources on campus, number of renewable energy sources on campus, and total carbon footprint divided by the total campus population (metric tons per person). Furthermore, the waste in the college will be recycled through several programs, such as paper and plastic reduction, organic and inorganic waste management, sewage disposal, and toxic waste treatment.
Building a Sustainable Future: Unraveling the Link between Environmental Awareness and the Cultivation of Employability and Green skills-A Literature Review
Authors: Rahmaningtyas W. , Joyoatmojo S. , Kristiani K. , Murwaningsih T. 
Published: October 2023

Abstract
Environmental awareness as a strong predictor in influencing students’ green skills preparation to meet the demands of skills required in the green industry. It is undeniable that employers nowadays prefer workers who possess environmentally friendly skills to promote awareness of sustainable development in various aspects of life, such as the environment, social, and economic domains. This article aims to explore how to build a sustainable future by examining the relationship between environmental awareness and the development of work-related abilities (green skills) based on existing literature. The method used is a literature review of published articles from various academic databases such as Google Scholar, Emerald, ScienceDirect, Elsevier, Scopus, and ResearchGate. Findings from the literature review indicate that environmental awareness has a strong correlation with the formation of green skills, particularly in energy, communication, leadership, waste management, and management skills. Contributions from educational institutions are needed to generate policies that stimulate environmental awareness among students, thereby fostering the development of environmentally friendly skills.
Debt, Profitability, and Corporate Social Responsibility – A Political Economic Theory Analysis
Authors: Mukhibad H. , Hapsoro B. B. , Jayanto P. Y. 
Published: October 2023

Abstract
This study aims to provide empirical evidence of the effect of short-term debt (STD), long-term debt (LTD), and return on assets (ROA) on corporate social responsibility disclosure (CSRD) and how the impact the Covid-19 pandemic (covid) has on the effect of STD, LTD, and ROA on CSRD. The research sample is a manufacturing company listed on the Indonesian stock exchange and observed from 2015 to 2021. Our study shows that STD does not affect CSRD, but LTD has a negative effect on CSRD. Based on CSRD indicators (social, environmental, economic disclosure), the results show that LTD has a negative effect on social and environmental disclosure. However, LTD has a positive effect on economic disclosure. The covid has caused LTD to have a positive effect on CSRD. These results show that during the covid, which caused a decline in financial performance, companies used CSRD as a tool to gain legitimacy and build investor confidence in the company’s financial performance. This study also shows that ROA has a positive effect on CSRD, and the covid has no effect on the effect that ROA has on CSRD.