bluuebunny/crossref_metadata_2025_split huggingface dataset:
CFD MODELLING OF THERMAL AERODYNAMIC CHARACTERISTICS OF COMPOSITE FLAT-OVAL TUBE WITH INCOMPLETE CORRUGATED FIN
Authors: Baranyuk Oleksandr , Vorobyov Nikita , Alekseik Yevhenii , Mazurenko Anton 
Published: August 2023

In the article thermo-aerodynamic characteristics of the original design of a heat exchange surface - a flat-oval tube with incomplete corrugated fins, which can be used for the modernization of heat exchange equipment, are studied. The purpose of the work is a preliminary assessment of the efficiency of flat-oval tubes with incomplete corrugated fins and obtaining an empirical dependence for calculation using CFD modeling. The object of the study is forced convection during transverse washing of a composite flat-oval tube with incomplete corrugated fins. The subject of the study is heat transfer and aerodynamics during transverse washing of a composite flat-oval tube with incomplete corrugated fins. In the work, the values of the dimensionless coefficient of heat transfer and pressure loss are obtained, as well as the calculated dependence for determining the coefficient of heat transfer and aerodynamic resistance of the mentioned types of tubes is presented. Data verification was carried out with a smooth tube and a tube with spiral fins. The scientific novelty of the work is the establishment of the fact that flat-oval tubes with incomplete corrugated fins have a higher heat transfer coefficient compared to smooth tubes (by 45 – 50 % in average) and spiral-ribbed tubes (by 25 – 30 % in average) with simultaneous increasing of aerodynamic resistance by 25 – 30 % at the same flow rate of the heat carrier. Practical application of the obtained results allows designers to increase the surface area of heat exchange, which makes these tubes prospective for using in power engineering and industry, in particular, for dry cooling towers of nuclear power plants and thermal power plants, for boiler heat exchangers, for gas turbine installations, etc.
HYDROACOUSTICS OF THE MECHANICAL BILEAFLET HEART VALVE
Authors: Voskoboinick Volodymyr , Redaelli Alberto , Fiore Bengamino , Voskoboinyk Oleksandr , Voskobiinyk Andriy 
Published: August 2023

The results of experimental researches of hydrodynamic noise generated by a jet flow through the mechanical bileaflet mitral valve prosthesis of the Italian company Sorin are given. Physical simulation was carried out in laboratory conditions on the model of the left atrial chamber and the left ventricular chamber of the heart. The hydrodynamic noise of the flow through the artificial bileaflet mitral valve increased with increasing water flow. It was found that the greatest intensity of hydrodynamic noise and its spectral components was observed near the central jet of the bileaflet mitral valve. The obtained average pressure values in the near wake of the open mitral valve near the side jet are (10 – 20) % higher than near the central jet. It was determined that the power spectral densities of pressure fluctuations near the central jet are higher than near the side jet, especially in the frequency range (10 – 100) Hz. It was established that the small-scale vortex structures, which broke away from its leaflets and generated pressure fluctuations in the frequency range (20 – 70) Hz, degenerated starting from a distance of 2.5 valve diameters downstream. Increased levels of pressure fluctuations were observed near the central jet by more than (12 – 13) dB relative to hydrodynamic noise inside the atrial chamber and by more than (5 – 7) dB higher relative to pressure fluctuations near the side jet inside the left ventricular chamber in the frequency range (12 – 15) Hz. With an increase in water flow in the near wake of the mitral valve, an increase in the spectral levels of pressure fluctuations in the frequency range (60 – 80) Hz was observed. At a distance of more than below the open mechanical bileaflet mitral valve, the hydrodynamic noises near the central and side jets became approximately equal in the entire frequency range under consideration. The research results showed that hydroacoustic diagnostics of the operation of the mechanical bileaflet heart valve can be an effective means of diagnosing thrombus formation on the artificial valve leaflets.
Interaction between Islamic Financial Development and Economic Growth: Empirical Evidence from Indonesia
Authors: Ambariyanto Ambariyanto , Anshori Muslich , Mawardi Imron , Fauzi R Moh Qudsi 
Published: August 2023

Financial development and economic growth have been thoroughly analyzed in the literature extensively. The discussion revolved on whether the financial sector leads the real sector in the process of economic development or whether it is the other way around. There is now no consensus on the causal relationship between financial development and economic growth. So, it is necessary to determine the relationship between financial development and economic growth in order to make accurate economic growth estimations. This paper examines an interaction model between Islamic financial development and economic growth that assumes the consumption of real resources by the financial sector. This research used Hadri Lagrange-Multiplier to investigate association’s path between variables. As a result, the interaction between Islamic financial development and economic growth may be unidirectional. However, the Islamic financial system is unsustainable, the Islamic financial market's contribution remains modest, and this could not eventually contribute to economic growth significantly. In addition, the results of this study reveal that the development of Islamic financial institutions in Indonesia has not yet had a significant effect on the welfare of Indonesian society. Due to rising demand for financial services, it was believed that economic growth drives finance in developing nations. Moreover, Economic growth fosters competition among financial intermediaries, resulting in more efficient financial transactions and, consequently, increased growth.
The Effect of Infrastructure, Investment, and Economic Growth on Community Welfare Through Employment Opportunities in Indonesia
Authors: Eliana Ayu , Endang Endang 
Published: August 2023

Employment opportunities and community welfare are related, the opportunity for people who work will earn income for the community to fulfill their daily needs which is described by community welfare. This study used secondary data obtained through the Central Bureau of Statistics, then analyzed using path analysis techniques with the help of Eviews 12. The results showed that infrastructure and investment had a negative and insignificant effect on employment opportunities, but economic growth had a significant negative effect on employment opportunities. Infrastructure and investment have a positive and insignificant effect on the welfare of the community, economic growth has a negative effect and does not have a significant effect on the welfare of the community. Opportunity to work has a positive and significant impact on the welfare of maisyairaikait. Infrastructure has no other direct effect on the welfare of the people, while investment and economic growth can have an indirect effect on the people's welfare through the opportunity to work in Indonesia.
High-solution emission patterns and health risks of volatile organic compounds from automobile repair industries in Beijing
Authors: Du Zhanxia , Li Hanbing , Nie Lei , Yao Zhen , Zhang Xinmin , Liu Yuting , Chen Sha 
Published: August 2023

Abstract
The increasing automobile repair industries (ARIs) with spray facilities have become an important volatile organic compounds (VOCs) pollution source in China. However, the VOCs health risk assessment for long-term exposure in ARIs have not been well characterized. In this study, though sampled VOCs from 51 typical ARIs in Beijing, the relationship between emission patterns, average daily exposure concentrations (EC) and health risks were comprehensively analyzed with the health assessment method. Results showed that concentrations of 117 VOCs from the samples ranged from 68.53 to 19863.32 µg·m− 3, aromatics were the main VOCs component in mix paint (MP) workshops and water-based paint spraying (WPS) workshops, accounting for 44.00% and 70.08%, respectively. And ARIs operator's daily VOCs inhalation EC was 11.24-1460.70 µg·m− 3. The method of inhalation exposure health risk assessment was firstly used to evaluate carcinogenicity and non-carcinogenicity risk for sprayers in ARIs. The cumulative lifetime carcinogenic risk (LCR) for 24 sampled VOCs were within acceptable ranges, while the mean hazard index (HI) with 44 sampled VOCs was over 1. Among them, the LCR and HI of VOCs in solvent-based spraying workshops were 8.72E-12 to 5.66E-7 and 0.13 to 22.37, and ethanol had a high carcinogenic risk. Of these, the mean HI associated with aromatics were 6.45 to 9.64. Our study will provide the important references for the standard of VOCs occupational exposure health limits in ARIs.
Analysis of SER for GFDM System in α-µ Fading Channel for 5G Wireless Applications
Authors: JADA LINGAIAH , SHIYAMALA S , BANDARI SHRAVAN KUMAR 
Published: August 2023

Abstract

A flexible radio waveform, generalised frequency division multiplexing (GFDM) allows for significant degrees of freedom in adjusting the number of time slots, subcarriers, and pulse shaping filters. The GFDM is one of the multi-carrier techniques that has been proposed to achieve 5G requirements. Initially, this study discusses about the derivation of novel analytical expression of symbol error rate under α-μ fading channel using the GFDM system. The proposed derivation includes Rayleigh, Nakagami-m, and Nakagami-q fading channels as special cases for different α and μ values. Further, a simulation test-bed has been developed in MATLAB to access the simulation results and they are in good agreement with the derived theoretical results for various simulation parameters such as different roll-off factors, modulation orders and various fading parameters.
Adapting and scaling a proven diabetes prevention program across 11 worksites in India: the INDIA-WORKS trial
Authors: Weber Mary Beth , Rhodes Elizabeth C. , Ranjani Harish , Jeemon Panniyammakal , Ali Mohammed K. , Hennink Monique M. , Anjana Ranjit M. , Mohan Viswanathan , Narayan K.M. Venkat , Prabhakaran Dorairaj 
Published: August 2023

Abstract
Background: Delivery of proven structured lifestyle change education for reducing the burden of cardiometabolic diseases such as diabetes at worksites could overcome barriers to program adoption and improve sustainability and reach of these programs; however, tailoring to the worksite setting is essential.
Methods: The Integrating Diabetes Prevention in Workplaces (INDIA-WORKS) study tested the implementation and effectiveness of a multi-level program for reducing cardiometabolic disease risk factors at eleven large and diverse worksites across India. Herein, we describe and classify program adaptations reported during in-depth interviews and focus group discussions with worksite managers, program staff, peer educators involved in program delivery, and program participants and drop-outs. We used thematic analysis to identify key themes in the data and classified reported program adaptations using the FRAME classification system.
Results: Adaptations were led by worksite managers, peer educators, and program staff members. They occurred both pre- and during program implementation and were both planned (proactive) and unplanned (proactive and reactive). The most frequently reported adaptations to the individual-level intervention were curriculum changes to tailor lessons to the local context, make the program more appealing to the workers at the site, or add exercise options. Other content adaptations included improvements to the screening protocol, intervention scheduling, and outreach plans to tailor participant recruitment and retention to the sites. Environment-level content adaptations included expanding or leveraging healthy food and exercise options at the worksites. Challenges to adaptation included scheduling and worksite-level challenges. Participants discussed the need to continue adapting the program in the future to continue making it relevant for worksite settings and engaging for employees.
Conclusion: This study describes and classifies site-specific modifications to a structured lifestyle change education program with worksite-wide health improvements in India. This adds to the literature on implementation adaptation in general and worksite wellness in India, a country with a large and growing workforce with, or at risk of, serious cardiometabolic diseases. This information is key for program scale-up, dissemination, and implementation in other settings.
Trial Registration: Clinicaltrial.gov NCT02813668, registered June 27, 2016
Ocean wave buoy network in extreme tropical cyclones detects the saturation of air-sea momentum transfer
Authors: Shimura Tomoya , Mori Nobuhito , Miyashita Takuya 
Published: August 2023

Abstract
Tropical cyclone is one of the most destructive natural phenomena, causing tremendous disasters worldwide. The maximum intensity of tropical cyclones is determined by momentum and heat transfer at the air-sea interface. Momentum transfer corresponds to the momentum loss of tropical cyclones and, consequently, to the underlying ocean’s momentum gain. Air-side observations of wind profiles (top-down approach) and ocean-side observations of ocean subsurface currents (bottom-up approach) showed a slowdown of momentum transfer under high tropical cyclone wind speeds. Although the intensity of tropical cyclones and related disasters are directly related to momentum transfer at high wind speeds, there is still disagreement regarding the slowdown owing to lack of data. Here, we showed momentum transfer in a high-wind-speed region by observing ocean waves directly at the air-sea interface (middle-up-down approach). Although ocean wave observations are highly spatially limited, we deployed a fleet of newly developed drifting ocean wave buoys covering the active area of tropical cyclones in the Western North Pacific. The buoys fleet captured extreme waves near the eye of the strongest category 5 tropical cyclone, showing clear saturation of momentum transfer beyond surface wind speeds of 25 m/s. Our ocean waves (air-sea interface) results fill in the missing link of quantitative momentum transfer slowdown under extreme wind speeds from both the air and ocean sides. This finding advances not only tropical cyclone modelling but also ocean waves, ocean circulation, and storm surge modelling.
Dielectric and Energy Harvesting Properties of Functionalized Composite Nanofibers Consisting of Boc-Phe-Leu Self-Assembled Dipeptide Inclusions in Biocompatible Polymeric Matrices
Authors: Handa Adelino , Baptista Rosa M. F. , Santos Daniela , Silva Bruna , Oliveira João , Almeida Bernardo , Gomes Etelvina de Matos , Belsley Michael 
Published: August 2023

Abstract
Hybrid bionanomaterials were produced through electrospinning, incorporating the dipeptide Boc-L-phenylalanyl-L-leucine into nanofibers of biocompatible polymers (Poly-L-lactic acid, Polycaprolactone, and Poly(methyl methacrylate). Scanning electron microscopy confirmed the uniformity of the nanofibers, with diameters ranging from 0.56 to 1.61 mm. The dielectric properties of the nanofibers were characterized using impedance spectroscopy, assessing temperature and frequency dependencies. Remarkable alterations in nanofiber behavior were observed due to the presence of embedded dipeptides. This study enhances our understanding of the dielectric performance of composite polymeric nanofibers and highlights the influence of dipeptide nanostructures on their dielectric, pyroelectric, and piezoelectric properties. Notably, the composite micro/nanofibers, including Boc-Phe-Leu@PLLA, exhibited semiconducting dielectric behavior with bandgap energies of 4-5 eV. The analysis revealed an increased dielectric constant with temperature, attributed to enhanced charge mobility. Maxwell-Wagner interfacial polarization confirmed the successful incorporation of the dipeptide in the fibers. The Havriliak-Negami model provided insights into the electric permittivity and revealed the contribution of polaron and ionic conduction, dependent on the polymer matrix. The fibers also demonstrated pyroelectric and piezoelectric responses, with Boc-Phe-Leu@PLLA nanofibers exhibiting the highest piezoelectric coefficient of 85 pC/N. These findings validate the potential of polymeric micro/nanofibers as piezoelectric energy generators for portable and wearable devices.
Dead-zone free Memristor-based Phase-Frequency Detector for Duty-Cycled Transceivers
Authors: Elashkar Nahla , Ibrahim Ghada , Hussein Ahmed 
Published: August 2023

Abstract

In this paper, a novel and simple Phase-Frequency Detection (PFD) technique based on two memristor elements is proposed and demonstrated. This PFD technique can generate a DC signal that represents the difference in phase or frequency between two sinusoidal inputs. Therefore, the proposed technique eliminates the need for the Low Pass Filter (LPF) block in the Phase-Locked Loop (PLL) structure, which reduces the dissipated power and the area of the overall PLL system, hence results in more efficiency when used in the body implants. Moreover, this Phase detector can be combined with a memristor-based Voltage Controlled Oscillator (VCO) for building, to the best of our knowledge, the first reported memristor-based PLL system. The simulations for the proposed PFD circuit are performed using a realistic nonlinear dopant drift memristor model to confirm the validity of the predicted results, while incorporating all known non-idealities of factual realized memristor devices. The simulation results reveal the zero dead-zone feature. Furthermore, the proposed circuit fits well in Normally-Off and duty-cycled transceiver systems designed for extreme low power consumption. This stems from the fact of its switched nature, besides fast start-up.
Effects of traditional Chinese culture based bibliotherapy on the spiritual health of patients with liver cancer
Authors: huang Ling , zhang Honghui , Xiao Yuting , Li Qian , Huang Xiu , Li Lihui , xiao Shan , Li Ou , wang Le 
Published: August 2023

Abstract

Background:Liver cancer is a serious global health problem and is associated with poor spiritual health. Bibliotherapy is beneficial in improving health outcomes in cancer patients, yet there is a lack of empirical evidence of its effect on the spiritual health of liver cancer patients in China. The study aimed to investigate the effects of bibliotherapy based on Chinese traditional culture on the spiritual health of patients with liver cancer in China. This study was approved by the Ethics Committee of Hunan Normal University School of Medicine and registered with the Chinese Clinical Trial Registry with the registration (No:2021260), which registration in June 30th 2021.Methods: A total of 60 patients with liver cancer were divided into the intervention group (n=30) and the control group (n=30) through WeChat. The intervention group received bibliotherapy therapy based on traditional Chinese culture, while the control group received routine care. Spiritual health was assessed using the Spiritual Attitude and Involvement List (SAIL) and compared before and after the intervention between the two groups. The chi-square test and t-test were used to analyze the intervention effects.Results:The two groups were comparable in all baseline characteristics including the SAIL score. After five weeks of intervention, the score of SAIL increased significantly from 96.76±15.08 to 106.93±13.82 in the intervention group (t=-29.380, p<0.001), while no significant difference in SAIL score was observed in the control group (from 95.27±16.40 to 95.31±16.24,t=-0.189,p=0.852). Similar patterns were also observed in its three dimensions of connecting with oneself, connecting with the environment, and connecting with transcendence.Conclusions:Our study showed that bibliotherapy based on traditional Chinese culture using the WeChat platform can greatly improve the spiritual health of patients with liver cancer and has the potential to be widely applied to cancer patients to improve their well-being.
Estimation of the Weibull Distribution Parameters and Reliability Using Runge-Kutta Method based on Interval-Censored Data
Authors: Maswadah M. 
Published: August 2023

Abstract
In parameter estimation techniques, distribution parameters are usually independent, but theoretically, the distribution parameters are dependent because they are estimated from the same sampling group. Thus, based on this dependence, we provide an optimal technique using the Runge-Kutta method to estimate the Weibull model parameters and reliability and compare them with the Bayesian estimators based on the informative and kernel priors, via Monte Carlo simulations based on the interval-censored data. The simulation results indicated that the Runge-Kutta method provides better estimates and outperforms the Bayesian method using different loss functions. Finally, from a future perspective, the proposed model can be used to analyze some real data on COVID-19 deaths in Egypt using these methods, for potential comparative studies of this epidemic.
Reservoir operation management using a new hybrid algorithm of Invasive Weed Optimization and Cuckoo Search Algorithm
Authors: Trivedi Mugdha , Shrivastava R. K. 
Published: August 2023

Abstract

Water scarcity throughout the world has led to major difficulties and complexities in managing water demands. These challenges gravitate towards the development of efficient methods for optimal reservoir operation. The present study aims to introduce a hybrid approach which integrates Invasive Weed Optimization (IWO) and Cuckoo Search Algorithm (CSA), with an objective to minimize the deficits for Indira Sagar Reservoir (ISR), India. To prevail over the limitations of the Weed Optimization Algorithm (WOA) and CSA, a critical comparison has been made in the study. The hybrid approach has improved the performance by 5 and 9% as compared to WOA and CSA, respectively. For the reservoir system, the Cv for 10 random runs was computed to be 0.0303 using the hybrid model, whereas for WOA and CSA, Cv was 0.22034 and 0.30698, respectively. Based on the performance measuring indices, results revealed that the hybrid model is more reliable and sustainable with the minimum error between release and demand. In addition, results reveal that the deficits have been reduced by 62% on average for the considered study period using the hybrid approach. Therefore, the results show that the proposed hybrid model has considerable potential to be used as an optimizer for complex reservoir operation problems.