bluuebunny/crossref_metadata_2025 huggingface dataset:
Penetrative ferroconvection in a heterogeneous Brinkman porous medium
Authors: Ravisha M. , Alsulami M. D. , Mamatha A. L. , Shivakumara I. S.
Published: September 2022

This study aims at finding the linear theory for the onset of ferromagnetic convective flow in a heterogeneous Brinkman porous layer with uniformly distributed internal heat source in the presence of vertical magnetic field. The resulting critical values are obtained numerically using the Galerkin technique for isothermal/insulated rigid-ferromagnetic boundaries for different forms of vertical heterogeneity permeability function [Formula: see text]. The results converge for six terms in the Galerkin expansion. The effect of types of [Formula: see text] and [Formula: see text] is found to either delay or speedup the flow of the ferrofluids. The stability of the system for the model [Formula: see text] is more stable and least stable for the model [Formula: see text] in the presence of [Formula: see text]. For different forms of [Formula: see text], the results show that the critical Rayleigh number increases with increasing [Formula: see text], while decreases with increasing [Formula: see text] and [Formula: see text]. The values of [Formula: see text] increase with [Formula: see text], but they decrease with increasing [Formula: see text] and [Formula: see text]. Besides, isothermal boundaries are found to be more stabilizing when compared to insulated boundaries.
Features of magnetic field on biological Williamson fluid in radiated blood flow induced by gold particles through a curved moving surface with buoyancy effect
Authors: Khan Umair , Zaib A. , Ishak A. , Waini I. , Raizah Zehba , Galal Ahmed M.
Published: September 2022

Cancer is a disease that is extremely lethal and dangerous to its patients. This study suggests that blood particles containing gold can control and decimate it because these particles have a large atomic size, which raises the temperature and helps to control cancer cells (malignant tumors). The current exploration is eager to deal with a 2D mixed convection flow through blood heat diffusion, which conveys the blood fluid (Williamson fluid) through the use of gold substances from a moving curved surface. The flow problem is represented by curvilinear coordinates. Magnetic interaction with radiation is also induced. The method of similarity parameters is used to convert the Williamson model’s partial differential equation into nonlinear ordinary differential equations and utilized the bvp4c solver to find dual solutions. Sketches are used to convey numerical results for velocity distribution, the friction factor, and heat transfer with temperature profile. The results indicate that the blood flow interrupts, while the temperature accelerates due to the magnetic field. In addition, the volume fraction enhances the temperature and decelerates the blood velocity.
Physical significance of rectangular and hyperbolic annular fin with radiation, convection and nonlinear variable properties
Authors: Jagadeesha K. C. , Kumar R. S. Varun , Sowmya G. , Prasannakumara B. C. , Khan M. Ijaz , Guedri Kamel , Jameel Mohammed , Galal Ahmed M.
Published: September 2022

The present examination elaborates on the thermal distribution and thermal stress analysis of a hyperbolic- and rectangular-profiled annular fin subjected to radiation, internal heat generation, and convection. The temperature-dependent nonlinear thermal properties governed by the power law are considered. The heat transport and steady-state thermal distribution in the fin are scrutinized using a mathematical model. The modeled equation has been converted into nonlinear ordinary differential equations (ODEs) using relevant non-dimensional terms. The resultant nonlinear coupled ODEs are solved analytically using the DTM-Pade approximant. The behavior of temperature distribution and thermal stress in the presence of various arising parameters is signified using graphical formations. The analytical results achieved from this investigation are compared to existing studies, and they show a good agreement. The thermal distribution in the fin is reduced as a result of elevated convective and radiative parameter values. Improved heat generation parameter values optimize the thermal distribution in the fin.
Insight into the study of natural convection heat transfer mechanisms in a square cavity via finite volume method
Authors: Haider Jamil Abbas , Ahammad N. Ameer , Khan Muhammad Naveed , Guedri Kamel , Galal Ahmed M.
Published: September 2022

A computer model of heat transmission in a square cavity was created in order to have a better understanding of the consequences. Temperature differences between the top and bottom walls are what cause convection, whereas the remaining left and right walls remain adiabatic and do not contribute to the process (unheated). In order to provide an accurate estimate of the two-dimensional steady flow inside a square cavity, a novel finite volume (FV) method that incorporates adaptive upwind convection is applied. Due to natural convection’s widespread use in the industrial sector, a significant amount of research has been conducted on the topic of how its usage affects the rate of heat transfer in enclosed areas. In a square cavity, the equations for the mass balance, momentum balance, and energy balance of the system are studied.
The laser–plasma interaction: A bibliometric study
Authors: Abedi-Varaki Mehdi
Published: September 2022

This study focuses on the review of present and future research directions in the field of laser–plasma interaction by using bibliometric analysis. Data sources in this study are collected from the WoS core collection database. A total of 2650 documents from 1990 to 2022 are analyzed. Author keywords, countries/regions, highly-cited articles and scholars, fruitful journals and productive institutions are discussed in detail. Results indicate that in terms of the volume of published documents, research institutes and related journals in this area, the USA is the leading country, followed by China, France and the UK. Furthermore, the USA has the highest number of publications and is the most frequently cited country in the world. Also, Physics of Plasmas, published by the AIP, holds the first rank among journals in terms of papers published and most global cited documents in laser–plasma interaction research. Moreover, the Lawrence Livermore National Laboratory, Livermore, USA, is the most productive institution. Furthermore, biometric analysis reveals the growth rate of related articles in this field that has been somewhat stable and in recent years, investigations by scholars are mostly focused on simulation with programming (e.g., Particle-In-Cell (PIC) codes), studying the effects of electric and magnetic fields, laser–plasma dynamics, ion-acceleration and laser-driven plasma accelerators.
Analysis of improvement of freezing with inclusion of nanopowders utilizing implicit method
Authors: Ayed Hamdi
Published: September 2022

This work contains simulation of solidification within a container with new structure. The assumption of neglecting velocity term for solidification formulation leads to the reduction of number equation for such 2D modeling to two equations and FEM was selected for this purpose. This model involves adaptive grid that incorporates the implicit approach for transient terms. The water that incorporates various sizes of nanopowders leads to creating new material and for predicting the properties, the formulation based on homogeneous mixing has been utilized. Adding nanoparticles leads to a reduction of the required time around 26.52% and 12.25% when [Formula: see text] and 50 nm while its effect for [Formula: see text] nm is 41.19%. As the size of the particles augments upto 40 nanometer, the required time declines around 19.96% while augmenting upto 50 nanometer leads to augment of time of around 49.2%.
One-parameter generalization of the bihyperbolic Jacobsthal numbers
Authors: Bród Dorota , Szynal-Liana Anetta , Włoch Iwona
Published: September 2022

In this paper, we introduce and study a one-parameter generalization of bihyperbolic Jacobsthal numbers. We give some identities and the generating function for these numbers.
A Decision Procedure for Guarded Separation Logic Complete Entailment Checking for Separation Logic with Inductive Definitions
Authors: Matheja Christoph , Pagel Jens , Zuleger Florian
Published: September 2022

We develop a doubly exponential decision procedure for the satisfiability problem ofguarded separation logic—a novel fragment of separation logic featuring user-supplied inductive predicates, Boolean connectives, and separating connectives, including restricted (guarded) versions of negation, magic wand, and septraction. Moreover, we show that dropping the guards for any of the preceding connectives leads to an undecidable fragment.

We further apply our decision procedure to reason aboutentailmentsin the popular symbolic heap fragment of separation logic. In particular, we obtain a doubly exponential decision procedure for entailments between (quantifier-free) symbolic heaps with inductive predicate definitions of bounded treewidth (SLbtw)—one of the most expressive decidable fragments of separation logic. Together with the recently shown2ExpTime-hardness for entailments in said fragment, we conclude that the entailment problem forSLbtwis2ExpTime-complete—thereby closing a previously open complexity gap.
Near-Infrared Spectroscopy for Bladder Monitoring: A Machine Learning Approach
Authors: Fechner Pascal , König Fabian , Kratsch Wolfgang , Lockl Jannik , Röglinger Maximilian
Published: September 2022

Patients living with neurogenic bladder dysfunction can lose the sensation of their bladder filling. To avoid over-distension of the urinary bladder and prevent long-term damage to the urinary tract, the gold standard treatment is clean intermittent catheterization at predefined time intervals. However, the emptying schedule does not consider actual bladder volume, meaning that catheterization is performed more often than necessary, which can lead to complications such as urinary tract infections. Time-consuming catheterization also interferes with patients' daily routines and, in the case of an empty bladder, uses human and material resources unnecessarily. To enable individually tailored and volume-responsive bladder management, we design a model for the continuous monitoring of bladder volume. During our design science research process, we evaluate the model's applicability and usefulness through interviews with affected patients, prototyping, and application to a real-world
in vivo
dataset. The developed prototype predicts bladder volume based on relevant sensor data (i.e., near-infrared spectroscopy and acceleration) and the time elapsed since the previous micturition. Our comparison of several supervised state-of-the-art machine and deep learning models reveals that a long short-term memory network architecture achieves a mean absolute error of 116.7 ml that can improve bladder management for patients.
Dynamic Switching of 1.9 A/1.76 kV Forward Current NiO/β-Ga2O3 Rectifiers
Authors: Li Jian-Sian , Chiang Chao-Ching , Xia Xinyi , Tsai Cheng-Tse , Ren Fan , Liao Yu-Te , Pearton S. J.
Published: September 2022

The switching performance of unpackaged vertical geometry NiO/β-Ga2O3 rectifiers with a reverse breakdown voltage of 1.76 kV (0.1 cm diameter, 7.85 × 10−3 cm2 area) and an absolute forward current of 1.9 A fabricated on 20 μm thick epitaxial β-Ga2O3 drift layers and a double layer of NiO to optimize breakdown and contact resistance was measured with an inductive load test circuit. The Baliga figure-of-merit of the devices was 261 MW.cm−2, with differential on-state resistance of 11.86 mΩ.cm2. The recovery characteristics for these rectifiers switching from forward current of 1 A to reverse off-state voltage of −550 V showed a measurement-parasitic-limited recovery time (trr) of 101 ns, with a peak current value of 1.4 A for switching from 640 V. The reverse recovery time was limited by extrinsic parasitic and thus does not represent the intrinsic device characteristics. There was no significant dependence of trr on switching voltage or forward current.
Gallium Antimonide Spherical Semiconductor Quantum Dots
Authors: Lakhal Lynda , Mezrag Fadila , Bouarissa Nadir
Published: September 2022

The quantum effects at the nano-metric level have been observed in a variety of confined structures, particularly in semiconductor quantum dots. In this contribution, the electronic and optical properties of GaSb spherical semiconductor quantum dots are investigated. For the calculations, the pseudo potential approach was employed. The size dependence of the energy gaps at Г, X and L points, the effective masses of electrons and heavy-holes, the refractive index, and the dielectric function for a studied GaSb spherical quantum dot are analyzed and discussed. When the degree of quantum confinement effect was changed by decreasing the radius of the spherical quantum dots, a striking charge in comparison to the bulk values has been obtained. Our results indicate that as the quantum dot radius is raised, most of properties rapidly decrease. This demonstrates an improvement in the mobility of the material. However, the refractive index and the dielectric constant are increased with increasing the radius of the nano-crystal.
Design and Performance Investigation of a Source Pocket-Based Charge Plasma TFET with Gate Underlap Technique
Authors: Panda Shwetapadma , Dash Sidhartha
Published: September 2022

This paper presents a source pocket-based charge plasma tunnel field-effect transistor with gate-drain underlap engineering (SP-GDUCPTFET) intending to maximize the ION/IAmb current switching ratio. Introducing a low bandgap Si0.6Ge0.4 pocket in the source region enhances the ON-state current (ION) thanks to the lower tunneling distance at the proximity of the source interface. Similarly, the device with underlap technique provides an 8-decades reduced ambipolar current (IAmb) with a lower subthreshold swing (SS). The proposed structure provides a maximum ION/IAmb current ratio of 1.88 × 1013
μA μA−1 and ION/IOFF ratio of 1.04 × 1014
μA μA−1. Further, the suggested device’s DC and analog/RF performance with underlap length (Lund) of 15 nm is investigated extensively. DC performances such as drain current characteristics, energy band diagram, surface potential analysis, band-to-band tunneling (BTBT) rate, lateral electric field, current ratios, the concentration of charges, and output characteristics have been discussed. In addition, the radio frequency (RF) analysis and the key figure of merits have been analyzed thoroughly to exhibit its superiority in high-frequency applications.
Learning veterinary anatomy playing cards
Authors: Chicharro Deborah , García-Manzanares María , Gómez Olga , Juárez Miriam , Llamazares-Martín Clara , Soriano Enrique , Terrado José
Published: September 2022

The development and implementation of a card game as a training resource that allows learning veterinary anatomy in a motivating and cooperative environment, promoting teamwork, relationships, and trust and communication between colleagues, is described. Stimulating the ability to solve problems as a team has provided help to students preparing for their exams in a more dynamic and enjoyable way.
A Generic Approach towards Amharic Sign Language Recognition
Authors: Yigzaw Netsanet , Meshesha Million , Diriba Chala
Published: September 2022

In the day-to-day life of communities, good communication channels are crucial for mutual understanding. The hearing-impaired community uses sign language, which is a visual and gestural language. In terms of orientation and expression, it is separate from written and spoken languages. Despite the fact that sign language is an excellent platform for communication among hearing-impaired persons, it has created a communication barrier between hearing-impaired and non-disabled people. To address this issue, researchers have proposed sign language to text translation systems for English and other European languages as a solution. The goal of this research is to design and develop an Amharic digital text converter system using Ethiopian sign language. The proposed system was created with the help of two key deep learning algorithms: a pretrained deep learning model and a Long Short-Term Memory (LSTM). The LSTM was used to extract sequence information from a sequence of image frames of a specific sign language, while the pretrained deep learning model was used to extract features from single frame images. The dataset used to train the algorithms was gathered in video format from Addis Ababa University. Prior to feeding the obtained dataset to the deep learning models, data preprocessing activities such as cleaning and video to image frame segmentation were conducted. The system was trained, validated, and tested using 80%, 10%, and 10% of the 2475 images created during the preprocessing step. Two pretrained deep learning models, EfficientNetB0 and ResNet50, were used in this investigation, and they attained an accuracy of 72.79%. In terms of precision and f1-score, ResNet50 outperformed EfficientNetB0. For the proposed system, a graphical user interface prototype was created, and the best performing model was chosen and implemented. The proposed system can be utilized as a starting point for other researchers to improve upon, based on the outcomes of the experiment. More high-quality training datasets and high-performance training machines, such as GPU-enabled computers, can be added to the system to improve it.
Digital Media Teaching and Effectiveness Evaluation Integrating Big Data and Artificial Intelligence
Authors: Zhang RuiYao
Published: September 2022

With the development of digital media technology, its application in teaching and learning is becoming more widespread. Digital media technology helps present information in transmitting knowledge or skills, reduces cognitive load, and promotes understanding of knowledge. Evaluation of the effectiveness of digital media teaching has also become important. A scientific and reasonable evaluation of digital media teaching effectiveness can help teachers select digital media technology and grasp the amount, degree, and timing of digital media use to change teaching effectiveness. This paper proposed using a combination of big data and artificial intelligence methods to evaluate the effectiveness of digital media teaching methods using the RBF neural network model. The digital media teaching effectiveness evaluation was used as the input variable of RBF, the degree of digital media effectiveness was the output variable and the neural network was trained through the collected sample data. The research results showed that the RBF neural network model proposed in this paper has a strong generalization and extension ability in evaluating digital media teaching effectiveness, providing a new way to evaluate digital media teaching effectiveness.
[Retracted] In Vitro Evaluation of Cytotoxic Potential of Caladium lindenii Extracts on Human Hepatocarcinoma HepG2 and Normal HEK293T Cell Lines
Authors: Kalsoom Aasia , Altaf Awais , Ashraf Muhammad , Ali Muhammad Muddassir , Aftab Saira , Sattar Huma , Sajjad Muhammad , Aqib Amjad Islam , Maqbool Tahir
Published: September 2022

Data regarding the therapeutic potential of Caladium lindenii (C. lindenii) are insufficient. It becomes more important to explore plants as an alternative or palliative therapeutics in deadly diseases around the globe. The current study was planned to explore C. lindenii for its anticancer activity of ethanolic and hexane extracts of C. lindenii leaves against hepatic carcinoma (HepG2) and human embryonic kidney (HEK293T) cell lines. HepG2 and HEK293T cells were treated with 10, 50, 100, 200, and 400 μg/mL of ethanolic and hexane extracts of C. lindenii and were incubated for 72 h. Antiproliferative activity was measured by 3‐(4,5‐dimethylthiazol‐2yl)‐2,5‐biphenyl tetrazolium bromide (MTT) assay, and percentage viability were calculated through crystal violet staining and cellular morphology by Floid Cell Imaging Station. The study showed ethanolic extract exhibiting a significantly higher antiproliferative effect on HepG2 (IC50 = 31 μg/mL) in a concentration‐dependent manner, while HEK293T (IC50 = 241 μg/mL) cells showed no toxicity. Hexane extract exhibited lower cytotoxicity (IC50 = 150 μg/mL) on HepG2 cells with no effect on HEK293T (IC50 = 550 μg/mL). On the other hand, the percentage viability of HepG2 cells was recorded as 78%, 67%, 50%, 37%, and 28% by ethanolic extracts, and 88%, 80%, 69%, 59%, and 50% by hexane extracts at tested concentrations of both extracts. Toxicity assay showed significantly safer ranges of percentage viabilities in normal cells (HEK293T), i.e., 95%, 90%, 88%, 76%, and 61% with ethanolic extract and 97%, 95%, 88%, 75%, and 62% with hexane extract. The assay validity revealed 100% viability in the control negative (dimethyl sulfoxide treated) and less than 45% in the control positive (cisplatin) on both HepG2 and HEK293T cells. Morphological studies showed alterations in HepG2 cells upon exposure to >50 μg/mL of ethanolic extracts and ≥400 μg/mL of hexane extracts. HEK293T on the other hand did not change its morphology against any of the extracts compared to the aggressive changes on the HepG2 cell line by both extracts and positive control (cisplatin). In conclusion, extracts of C. lindenii are proved to have significant potential for cytotoxicity‐induced apoptosis in human cancer HepG2 cells and are less toxic to normal HEK293T cells. Hence C. lindenii extracts are proposed to be used against hepatocellular carcinoma (HCC) after further validations.
Characteristics of Sedimentary Microfacies of Late Triassic Yanchang Formation in North-Central Ordos Basin
Authors: Wei Jiangwei , Li Fawang , Zhang Shikuo , Cheng Hanlie , Qin Qiang , Cadasse David
Published: September 2022

Sedimentary microfacies refer to the smallest unit with unique rock structure, structure, thickness, rhythm, and other sedimentary characteristics and certain plane configuration rules in the subfacies zone. Sedimentary microfacies research is the most basic sedimentary unit formed in the same or basically the same sedimentary background. Sedimentary microfacies marks are the key to the division of sedimentary microfacies. If we cannot find effective marks, we cannot correctly divide sedimentary microfacies. These marks are mainly obtained from detailed observation of cores. On the premise of fully understanding the regional tectonic background of the study area, the sedimentary facies and sedimentary subfacies types within the oilfield control range are determined. In this study, the single-well facies and profile facies are deeply analyzed by observing and describing the cores of Chang 2 reservoir group in Huangjialing, north-central Ordos Basin, and comprehensively utilizing the data of coring, logging, and core analysis and testing. The basic sedimentary characteristics, types of sedimentary facies and microfacies, and plane distribution of sedimentary facies in this area are systematically studied. The results show that there are mainly three microfacies: underwater distributary channel, natural dike, and distributary bay. Among them, the microfacies of the underwater natural dike are relatively undeveloped, mainly the microfacies of underwater distributary channel and underwater distributary bay. These studies have important practical significance for the later exploration of oil and gas in Ordos Basin.
Impact of Low‐Carbon City Policy on Enterprise Investment Efficiency: Based on the Heterogeneity of Chinese Urban Culture
Authors: Shi Yishuai , Guan Yuhang , Li Li
Published: September 2022

Based on panel data of Chinese listed companies, this paper estimates the impact of low‐carbon city policy (LCCP) on enterprise investment efficiency (EIE) by the heterogeneous timing difference in differences (HTDID) method and examines the heterogeneous effect of urban culture on the impact. The results show that LCCP improves EIE, and the research conclusion passes the robustness tests. Mechanism analysis reveals that LCCP mainly acts on EIE along two paths: promoting enterprise technological innovation and easing financing constraint. But the LCCP does not have a significant effect on resource allocation. On urban culture heterogeneity, the ecological wisdoms of green urban culture and Confucian culture, such as benevolence to all beings and the harmony between man and nature, help to enhance the promoting effect of LCCP on EIE. From the perspectives of the synergistic development between formal and informal institutions and of urban cultural governance, this research provides important reference and data support to EIE improvement.
Thermal Spin Transport Properties in Diarylethene-Based Molecule Devices
Authors: Xu Gang , Tan Xingyi , Ren Dahua
Published: September 2022

Spin caloritronic devices, as multifunctional devices, combining spintronics, and caloritronics, are essential for the sustainable development of humans. Here, a novel spin caloritronic device is presented using a diarylethene molecule photoswitch sandwiched among two semi-infinite zigzag graphene nanoribbons containing asymmetrical edge hydrogenation electrodes. We demonstrate that the temperature gradient between the right and the left electrodes can generate spin-up (SU) and spin-down (SD) currents moving in opposite orientations. Moreover, the mentioned currents possess approximately the same magnitudes, indicating a nearly nondissipative spin Seebeck effect. We also find that these currents are significantly dissimilar for the two photochromic isomers at different temperature gradients, demonstrating the excellent system’s switching nature. The obtained results reveal that the light can control the thermal spin transport properties.
Fish Oil Replacement with Poultry Oil in the Diet of Tiger Puffer (Takifugu rubripes): Effects on Growth Performance, Body Composition, and Lipid Metabolism
Authors: Li Lin , Zhang Feiran , Meng Xiaoxue , Cui Xishuai , Ma Qiang , Wei Yuliang , Liang Mengqing , Xu Houguo
Published: September 2022

Booming fish farming results in relative shortage of fish oil (FO), making it urgent to explore alternative lipid sources. This study comprehensively investigated the efficacy of FO replacement with poultry oil (PO) in diets of tiger puffer (average initial body weight, 12.28 g). An 8-week feeding trial was conducted with experimental diets, in which graded levels (0, 25, 50, 75, and 100%, named FO-C, 25PO, 50PO, 75PO, and 100PO, respectively) of FO were replaced with PO. The feeding trial was conducted in a flow-through seawater system. Each diet was fed to triplicate tanks. The results showed that FO replacement with PO did not significantly affect the growth performance of tiger puffer. FO replacement with PO at 50-100% even slightly increased the growth. PO feeding also had marginal effects on fish body composition, except that it increased the liver moisture content. Dietary PO tended to decrease the serum cholesterol and malondialdehyde content but increase the bile acid content. Increasing levels of dietary PO linearly upregulated the hepatic mRNA expression of the cholesterol biosynthesis enzyme, 3-hydroxy-3-methylglutaryl-CoA reductase, whereas high levels of dietary PO significantly upregulated the expression of the critical regulatory enzyme of bile acid biosynthesis, cholesterol 7-alpha-hydroxylase. In conclusion, poultry oil is a good substitution for fish oil in the diets of tiger puffer. Poultry oil could replace 100% added fish oil in the diet of tiger puffer, without adverse effects on growth and body composition.
A Smart Campus Implementation Architecture Based on Blockchain Technology
Authors: Lu Jin , Wu Bo
Published: September 2022

With the application of 5G technology in the field of education, the construction of smart campus has set off a wave of digital transformation. At the same time, the traditional smart campus is also facing the exponential growth of the number of Internet of Things devices, servers, and application terminals, which makes it difficult to achieve flat management. In view of the current difficulties in the construction of smart campus, this paper proposes smart campus architecture based on blockchain technology. Unlike the traditional smart campus architecture, this paper combines the characteristics of decentralization, high confidentiality, and data sharing of block chain with the Internet of Things technology, which greatly reduces the demand for data storage and physical network equipment. The new smart campus architecture plans the application of smart education based on blockchain, and provides a new solution model and research ideas.
Comparison of Perinatal, Newborn, and Audiometry Results of COVID-19 Pregnant Women
Authors: Yilmaz Mehmet , Aksin Şerif , Balsak Deniz , Avci Fazil , Özdoğru Osman , Helvacıoğlu Bekir , Erdemoğlu Mahmut , Aboalhasan Yasemin , Doğan Gülsüm
Published: September 2022

Objective. There are studies on the perinatal outcomes of COVID-19, but the audiometric effects of the maternal immune system against COVID-19 in the newborn are not clear. In this study, we aimed to investigate the relationship between the perinatal outcomes of COVID-19 positive pregnant women and the audiological outcomes of newborns. Materials and Methods. This retrospective, single-center cohort study was conducted with 65 polymerase chain reaction (PCR) positive pregnant women and newborns and 66 normal pregnant women and newborns who were admitted between January 2020–December 2021. Pregnancy data, perinatal outcomes, and newborn hearing test results of pregnant women and newborns were recorded and compared. Results. A total of 131 patients were enrolled in the study. The number of normal pregnant women was 66 (50.4%) and the number of pregnant women who had COVID-19 disease was 65 (49.6%). In general, gestational week, age, parity, biochemical parameters, duration of hospital stay, week of delivery, fetal weight, and apgar scores were compared between pregnant women with COVID-19 and normal. White blood cell (WBC), neutrophil, aspartate aminotransferase (AST), and C-reactive protein (CRP) parameters were found to be significantly higher, and lymphocyte and neutrophil/lymphocyte (N/L) ratios were significantly lower (

p
<
0.05

). There was no statistically significant difference between the two groups (χ2=0.001;

p
=
1,000

). The normal delivery status, the normal delivery rate in patients with COVID-19 was found to be statistically significantly higher than the cesarean section delivery status (

p
=
0.012

). In the statistical comparison between the COVID-19 and normal pregnant groups in the cesarean section group, the gestational week, delivery week, and apgar1 scores of the pregnant women with COVID-19 were found to be significantly higher. There was no statistically significant difference between the distributions of the rate of infants with hearing impairment in the comparison with hearing tests in pregnant women with COVID-19 (n=1) and normal pregnant women (n=1) (χ2=0.001;

p
=
1,000

). Conclusion. Although the negative effects of COVID-19 on pregnancy outcomes are rare, it was determined that there was no increased audiological risk factor, and the most important predictor of COVID-19 was lymphopenia.
Safety and Efficacy of the Supine Position with the Right Shoulder Raised versus the Left Lateral Position in Peroral Endoscopic Myotomy for Achalasia: A Large-Sample Retrospective Study
Authors: Wang Nanjun , Chai Ningli , Li Longsong , Bi Yawei , Liu Shengzhen , Zhang Wengang , Wang Shasha , Linghu Enqiang
Published: September 2022

Background. The correct surgical position is very important in the treatment of peroral endoscopic myotomy (POEM) for achalasia, which can make the procedure safer and more efficient. Currently, there are two commonly used positions: the supine position with the right shoulder raised and the left lateral position. This study aims to evaluate the differences in the safety and efficacy of these two positions. Methods. We conducted a retrospective study of 702 patients with achalasia undergoing POEM from December 2010 to December 2020. These patients were divided into the supine position with the right shoulder raised group (

n
=
579

) and the left lateral position group (

n
=
123

). The efficacy of POEM and adverse events were analyzed. Results. The clinical characteristics were similar in both groups, and there were no significant differences between the two groups in the Eckardt score change, lower esophageal sphincter (LES) basal pressure or residual pressure after POEM (all

p
>
0.05

). The mean operative time in the supine position with the right shoulder raised group was significantly shorter than that in the left lateral position group (43.5 min vs. 54.6 min, respectively,

p
<
0.001

). In addition, the differences between the two groups in terms of gas-related complications, such as pneumoperitoneum, pneumomediastinum, and subcutaneous emphysema were statistically significant (all

p
<
0.05

). Conclusions. The efficacy of POEM was comparable between the two groups. However, the supine position with the right shoulder raised significantly reduced the operative time and the rate of procedure-related adverse events, especially gas-related complications.
Kinematic Diagnosis of Throwing Motion of the Chinese Elite Female Discus Athletes Who Are Preparing for the Tokyo Olympic Games
Authors: Wang Lixia , Hao Lina , Zhang Bo
Published: September 2022

The purpose of this study was to examine the difference of kinematic skill characteristics between the Chinese and world elite female discus athletes. We used the methods of literature, three‐dimensional video analysis, and mathematical statistics to compare and analyze the differences of some kinematic parameters between the three Chinese female discus athletes and four world female discus athletes. The result shows that the speed of discus release of the Chinese elite female discus athletes is lower (p < 0.05) than that of the world elite female discus athletes. Compared to the world elite female discus athletes, the height of release is higher (p < 0.05). But there was no significant difference in the angle of release (p > 0.05), rotation rhythm (p > 0.05), and discus speed increment (p > 0.05) in different stages during the throwing procedure from double support stage to delivery stage. The results may provide reference for the special technique training of the Chinese female discus throwers, so as to improve the discus throwing level of Chinese women.
Application of Neural Network and Virtual Reality Technology in Digital Video Effects
Authors: Jiang Liao
Published: September 2022

With the continuous innovation of technology, digital technology is more and more widely used in the production of TV shows and movies and plays an important role. The effective application of digital video effects technology can enhance the visual effects of the overall TV and film works and improve the quality of the works. After the use of digital special effects in film and television production, people see more exquisite film and television pictures, but today’s technology is not enough to meet people’s growing demand for film and television pictures. This paper applied neural network and virtual reality technology to the production process of digital video effects and conducted a comparative experiment with the digital video effects produced by using the current technology. The special effects were evaluated in four aspects: image fidelity, sound distortion, picture fluency, and production efficiency. The experimental results show that after applying neural network and virtual reality technologies, the image fidelity of digital video effects is increased by 6.74%, the sound distortion is reduced by 7.69%, the picture fluency is increased by 6.89%, and the production efficiency is increased by 7.91%. Applying the neural network and virtual reality technology can improve the quality and efficiency of digital video special effects production.
Echium amoenum L. Ethanol Extract Protects Retinal Ganglion Cell after Glutamate and Optic Nerve Crush Injury
Authors: Li Haibo , Behnammanesh Ghazaleh , Wu Zhenkai , Rong Rong , You Mengling , Majid Aman Shah Abdul , Ji Dan
Published: September 2022

The development of low-cost and effective natural products for treating neuron degenerative diseases have proven to be safe and potentially effective. Echium amoenum L. (Boraginaceae) is an annual herb that grows wildly in Europe and western Asia. The aim of this study was to evaluate the neuroprotective properties of an ethanol extract of E. amoenum L. The effects of E. amoenum L. extract on oxidative stress were measured in the rat R28 retinal precursor cell line. Furthermore, the protective role of the extract on the glutamate-induced and optic nerve crush (ONC) injury-induced cell death were evaluated in vitro and in vivo, respectively. Our results showed that the ethanol extract of E. amoenum L. prevented the glutamate-induced decrease in cell viability and increase in cell death in R28 cells and suppressed the overproduction of ROS induced by glutamate. Moreover, the extract significantly inhibited microglial activation and optic nerve damage induced by ONC injury in mice. In addition, the mechanism was attributed to the ability of the extract to decrease NF-κB pathway activation and its downstream inflammatory cytokine production. In conclusion, E. amoenum L. ethanol extract had a potent neuroprotective effect against glutamate-induced and ONC-induced cell death. This is likely due to its antioxidant and anti-inflammatory properties.
Preventing Color Fading in Artist’s Oil Paintings Based on Nano-PZT Ferroelectric Thin Film
Authors: Liu Xiang
Published: September 2022

Due to the excellent electrical properties, stable temperature characteristics, and abundant material systems of ferroelectric thin film materials, in recent years, ferroelectric devices based on silicon technology have been used in microelectronic mechanical systems, new energy photovoltaics, especially nonvolatile memory and other fields. During the preservation of the artist’s oil painting works, the temperature change will directly cause the physical effects of thermal expansion and contraction of the oil painting and the chemical reaction speed of the material in nature. Therefore, it is of great significance to introduce the technology of nano-PZT ferroelectric thin film into oil paintings to prevent fading. This article aims to study the research on preventing fading of the artist’s oil paintings based on nano-PZT ferroelectric thin films and analyze the characteristics of ferroelectric materials, the application of ferroelectric films, the preparation methods of ferroelectric films, and the basis of the main environmental factors that affect the fading of oil paintings. In the above, we studied the fading process of different concentrations of oil paints under simulated sunlight aging and the effect of different concentrations and thicknesses of PZT ferroelectric thin films coated with nano-TiO2 coatings on the color stability of oil paints. The experimental results show that after five times of simulated solar aging for the four concentrations, the total color difference △E: 0.05% group is the largest, 0.4% group is the smallest, the higher the oil paint concentration, the smaller the color difference, the better the color stability, and the antisimulation of sunlight fading.
BIoMT Modular Infrastructure: The Recent Challenges, Issues, and Limitations in Blockchain Hyperledger-Enabled E-Healthcare Application
Authors: Shaikh Zaffar Ahmed , Khan Abdullah Ayub , Teng Lin , Wagan Asif Ali , Laghari Asif Ali
Published: September 2022

This paper presents a layered hierarchy that depicts the progressive relationship between data, information, knowledge, and wisdom. To begin with, data is gathered and organized into information. Information is gathered, filtered, refined, and put through an investigation process to create knowledge. Wisdom is attained after knowledge discovery through the process of filtration and aggregation through experience. The layered hierarchy in the domain of e-healthcare necessitates higher scheduling costs for data collection, processing wisdom, and management, which is also an insecure and untrustworthy process for progressive medical service. The medical industry faces a difficult problem in providing collected data integrity, information reliability, and knowledge trustworthiness for the service of progressive medical relationships in the face of an increasing number of day-to-day records. The blockchain consortium hyperledger (fabric) has been used in this paper to act as a bridge that bridges the gap between electronic data, information, knowledge, and wisdom (DIKW) movement and processes by enabling the process of the layered hierarchy of schedule information and management and providing security and transparency. For e-healthcare information management and privacy, the DIKW-ledger, such as patients’ consultancy information, availing medical services, personal records, appointments, treatment details, and other health-related transactions, a consortium hyperledger fabric-enabled efficient architecture is proposed. This proposed architecture creates two networks: a public network for medical stakeholders to exchange and agree on specific medical activities before being preserved on distributed storage (read-only after record registration) and a private network for complete DIKW process scheduling and management. We designed and created smart contracts for this purpose, as well as use-case diagrams to describe the overall execution process. The proposed architectural solution provides more efficient information integrity, provenance, and storage procedures to immutably preserve the medical ledger in a permissioned hash-encrypted structure.
Turkish Validity and Reliability Study of Challenge-Hindrance Demands Scale for the Nursing Profession
Authors: Ertaş Handan , Fi̇li̇z Emel , Kahveci̇ Şeyma , Ünal Seda Nur
Published: September 2022

This study aims to adapt “the Challenge-Hindrance Demands Scale for Nursing Professional” developed by Mahaverachartkul and Sooraksa; regarding “how nurses who are under heavy workload and stress as well as intense and tiring working hours perceive many stressful situations in the working environment as challenges or hindrances” to Turkish language and bring it to the use of national literature. In terms of method, the research was designed within the scope of the quantitative research model. Data collected from 450 nurses were used in this study. The research data were analyzed in SPSS 26.0 and AMOS 24.0 statistical programs. The validity of the scales used in this study was evaluated with exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). According to the EFA findings of the Challenge Demands Scale, when the KMO value (0.919) and the Bartlett sphericity test value (X2 (78) = 4121.203;

p
=
0.001

) were examined, it was seen that the data were suitable for analysis. When the CFA findings of the Challenge Demands Scale were examined, it was seen that the fit indices were at an acceptable level (X2 (60) = 223.912;

p
=
0.001

; CMIN/df = 3.732; CFI = 0.960; TLI = 0.948; RMSEA = 0.078; SRMR = 0.039). According to the EFA findings of the Hindrance Demands Scale, when the KMO value (0.947) and the Bartlett sphericity test value (X2 (78) = 5263.056;

p
=
0.001

) were examined, it was seen that the data were suitable for analysis. When the CFA findings of the Hindrance Demands Scale were examined, it was seen that the fit indices were at an acceptable level (X2 (61) = 208.794;

p
=
0.001

; CMIN/df = 3.423; CFI = 0.972; TLI = 0.964; RMSEA = 0.073; SRMR = 0.032). In conclusion, the Challenge-Hindrance Demands Scale for Nursing Professionals with 13 items and four dimensions developed to measure the stress, hindrance, and challenge levels of nurses in their professional life in Turkey may be used in future studies.
Convergence Analysis Hilbert Space Approach for Fuzzy Integro‐Differential Models
Authors: Zhang Jingwen
Published: September 2022

In this paper, we present and demonstrate an innovative numerical method, which makes use of fuzzy numbers and fuzzy parameters that is effective in the solution of fuzzy type Volterra integro‐differential equations, which was previously thought to be impossible using conventional methods. The first application of a technique for solving Volterra integro‐differential equations of the fuzzy type, which was devised and tested in this paper, is shown here. This is the first time that this approach has been used. This system’s overall quality may be improved as a consequence of the use of the Hilbert space replicating kernel idea, which is a possibility. Separate evaluations are made of the algorithms’ correctness and sloppiness, as well as their foundations in the computationally effective kernel Hilbert space, which has been extensively researched in the past. Numerical examples are provided of the article to demonstrate how the technique outlined before may achieve convergence and accuracy. Here are a few illustrations to help understand that it is possible to deal with physical issues that require complicated geometric calculations with the assistance of the method explained in this article.
lncRNA DARS-AS1 Modulates TSPAN1-Mediated ITGA2 Hypomethylation by Interaction with miR-194-5p Thus Promoting Ovarian Cancer Progression
Authors: Li Jun , Gao Haoyu , Chen Beibei , Li Li , Wang Qianqing , Gao Zhihui
Published: September 2022

Objective. Ovarian cancer (OC) is usually called the “silent killer” due to its asymptomatic characteristics until advanced stages, thus being a significant threat to female health worldwide. In this work, we characterized an oncogenic DARS-AS1 role in OC. Methods. The aggressiveness behaviors of the OC cell model were examined by CCK-8 assay, transwell invasion assay, flow cytometry, and immunoblotting analysis of apoptosis-related proteins. Interactions of miR-194-5p with lncRNA DARS-AS1 or TSPAN1 and of TSPAN1 with ITGA2 were validated by using a luciferase activity assay and chromatin immunoprecipitation (ChIP) assay. Results. The OC cell model exhibited overexpressed lncRNA DARS-AS1 compared to normal cells. lncRNA DARS-AS1 knockdown led to reduced OC cell growth and metastasis while inducing the apoptosis in the OC cell model. lncRNA DARS-AS1 positively regulated TSPAN1 expression by binding with miR-194-5p and TSPAN1-mediated ITGA2 hypomethylation in OC cells. Further rescue function studies demonstrated that lncRNA DARS-AS1 affected OC cell viability, migration, invasion, and apoptosis ability by modulating miR-194-5p and TSPAN1 expressions. Conclusion. Our work demonstrates that lncRNA DARS-AS1 promotes OC progression by modulating TSPAN1 and ITGA2 hypomethylation by binding with miR-194-5p.