bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of College Students’ Physical Health Test Data Based on Big Data and Health Promotion Countermeasures
Authors: Li Ming , Wang Fengcai
Published: August 2022

In order to improve the data analysis and health promotion effect of college students' physical health test, this paper combines the big data technology to carry out the analysis and health promotion system of college students’ physical health test data. Moreover, this paper analyzes and discusses the overall control strategy of the high-precision time-base calibrator and the time-base phase-locked synchronization method and studies the overall scheme design and system working process of the precision time-base calibrator in combination with the requirements of physical health testing. In addition, this paper conducts mathematical derivation and theoretical simulation analysis on the A/D conversion accuracy, noise source and influence, time-frequency characteristics, and corresponding speed of the second-order generalized integrator and constructs an analysis and health promotion system of college students’ physical health test data. The research results show that the college students’ physical health test data analysis system proposed in this paper has certain reliability, and on this basis, college students' health promotion countermeasures are proposed.
Phosphorus Adsorption and Its Correlation with Physicochemical Properties of Volcanic-Influenced Soils of Meupi-Awing in Northwest Cameroon
Authors: Alakeh Mofor Nelson , Buleng Tamungang Njoyim Estella , Alongifor Fai Joel
Published: August 2022

This study evaluated the physicochemical properties and phosphorus adsorption characteristics of surface soils (0–30 cm) of Meupi on the flank of Mount Lefo-Awing. In volcanic-influenced soils, usually characterized by high acidity, phosphorus is often not readily available to plants, and this deficit tends to limit plant growth. Soil physicochemical properties and phosphorus adsorption studies were carried out using standard techniques. Results of soil physicochemical studies showed that the soils were strongly acidic (pH ranged from 4.7 to 5.1), with low available phosphorus (5.47 to 6.97 mg/kg). The apparent equilibrium time for phosphorus to be adsorbed in the analyzed soils was 24 hours. Phosphorus sorption studies revealed that the rate of phosphorus adsorption increased with an increase in the concentration of added phosphorus but decreased at a certain level at higher concentrations because the soil had no more capacity to adsorb phosphorus. The degree of fitness (R2) of the phosphorus adsorption data for the different adsorption models was in the order Langmuir < Temkin < Van Huay < Freundlich. This suggested that the Freundlich isotherm model was the best fit to describe P sorption processes in soils. The pseudo-second-order kinetics model, which assumed that the rate of phosphorus sorption was dependent on the number of active sites, gave a good fit to predict and describe the kinetics of phosphorus sorption from the soil solution. The capacity of the soil to adsorb phosphorus significantly correlated positively with amorphous Fe (r = 0.953 and

p
<
0.05

), free Fe (r = 0.984, 0.976 and

p
<
0.05

), free Al (r = 0.994 and

p
<
0.01

, r = 0.988 and

p
<
0.05

), and clay (r = 0.968 and

p
<
0.05

), which were the main parameters considered as predictors of phosphorus adsorption activities in the soils.
Study on Sintered Wick Heat Pipe (SWHP) with CuO Nanofluids under Different Orientation
Authors: Kumar P. Manoj , Saminathan Rajasekaran , Tharwan Mohammed , Hadidi Haitham , Stalin P. Michael Joseph , Kumaresan G. , Ram S. , Rinawa Moti Lal , Saravanakumar P. T. , Karthikeyan K. , Gebreyohannes Dawit Tafesse
Published: August 2022

The current work investigates the performance of cylindrical‐shaped sintered wick heat pipe at different orientations, numerically. The results are compared and validated with the experimental findings. The study is extended by using a nanofluid (comprising nano‐Curo in deionized water) as a working fluid and the thermal performance of heat pipe with deionized (DI) water has been compared with that of heat pipe with nanofluid (containing various concentrations of CuO nanoparticles in DI water). During the investigation, the nanofluid with 1.0 weight fraction of CuO nanopaticles found to be optimum, which has produced the better results. The numerical analysis has been carried out to study the temperature difference, fluid velocity, and pressure drop of the sintered wick heat pipe using the commercial CFD software, Ansys Fluent R14.5. The computational results are observed to be much closer to the experimental data, and the vapor velocity at the heat pipe’s core has been determined to be 64.54% higher than the liquid flow over the wick structure. Interestingly, the heat pipe pressure drop has been reduced by adding CuO nanoparticles to the working fluid. Finally, the heat pipe loaded with a 1.0% concentration of nano‐CuO in nanofluid has exhibited a notable reduction in pressure drop of 35.33%.
Oil-Incorporated Poly(Lactic Acid) as an Alternative Material for Orthodontic Base Plate: A 3D Printing Approach
Authors: Naveed Niha , Dutta Kingshuk , Balamurugan D. , Haveri Amruth V. , Sabapathy Kannan
Published: August 2022

Removable orthodontic appliances fabricated from poly (methyl methacrylate) (PMMA) have been routinely used for active orthodontic correction and as retention appliances. This article reports the use of a combination of biodegradable-grade poly (lactic acid) (PLA) and cooking-grade sesame oil as a biodegradable alternative for PMMA. The underlying purpose is to combat the environmental hazards due to nondegradable PMMA as well as to overcome its structural and mechanical drawbacks. The fabrication technique that has been used is fused deposition modeling-based 3D printing technology. Oil-dipping for 24 h was done to render the PLA hydrophobic and to reduce its brittleness. Incorporation of oil within the PLA base plate has been confirmed by FT-IR and FT-Raman spectroscopic techniques. The PLA-cooking oil material has exhibited satisfactory tensile, compressive and flexural strengths. The proposed material has demonstrated excellent attributes in terms of product precision, dimensional stability, density, hardness, and maximum load bearing capacity for the purpose of fabricating orthodontic appliances.
ERK1/2‐Dependent Inhibition of Glycolysis in Curcumin‐Induced Cytotoxicity of Prostate Carcinoma Cells
Authors: Lee Yoon-Jin , Lee Sang-Han
Published: August 2022

Object. Extracellular acidosis of the tumor microenvironment plays an important role in cancer progression. In the 2D monolayer and 3D spheroid cultures of prostate cancer cells, we investigated the efficacy of curcumin in targeting glycolysis and the role of ERK1/2 as an upstream signaling molecule in this process. Methods. Cell viability, glycolytic activity, Annexin V‐PE binding activity, reactive oxygen species levels, mitochondrial membrane potential, ATP content, Western blot analysis, and spheroid viability were measured for this study. Results. Acidic pH‐tolerant prostate cancer cells, PC‐3AcT and DU145AcT, increased cytotoxicity with ERK1/2 inhibition in a curcumin concentration‐dependent manner at concentrations that resulted in >90% cell viability in normal prostate epithelial HPrEC cells. ERK1/2 inhibition by curcumin and/or PD98059 suppressed cell growth, reduced glucose consumption, and downregulated the expression of key regulatory enzymes in glucose metabolism including hexokinases, phosphofructokinase, and pyruvate dehydrogenase. In addition, these compounds caused loss of mitochondrial membrane potential with increased intracellular ROS levels, decreased levels of complexes I, III, and IV in the mitochondrial electron transport chain, and cellular ATP depletion, leading to upregulation of marker proteins in apoptosis (cleaved caspase‐3 and cleaved PARP) and necroptosis (p‐MLKL and p‐RIP3). The results of curcumin and/or PD98059 treatment in 3D cultures showed similar trends to those in 2D cultures. Conclusion. Taken together, the results provide mechanistic evidence for the antiglycolytic and cytotoxic roles of curcumin through inhibition of the MEK/ERK signaling pathway in prostate carcinoma cells preadapted to acidic conditions.
Research on Stock Market Portfolio Optimization Using Stochastic Matrix Theory and Genetic Algorithm
Authors: Zhang YanJin
Published: August 2022

Financial engineering is a synthesis of modern finance, information technology, engineering, and other fields. Under the complex and volatile market conditions, how to allocate assets reasonably to minimize the benefits and risks assumed is a very important topic. Using the principle of random matrix, the correlation statistical characteristics of stocks are analyzed, the noise reduction and reconstruction algorithm of the correlation matrix is discussed, and a new noise reduction algorithm, two-point determination method, is given. The investment portfolio is numerically simulated, and its parameters are set by the orthogonal experimental method. Through analysis, it is found that the eigenvector contained in the maximum eigenvalue of the correlation matrix can be regarded as a market indicator. The “two-point determination method” has a good effect in “denoising” and can provide operational decision-making and technical support for portfolios.
Research on the Relationship between Construction 4.0 and Construction Firm’s Performance: Based on the Mediating Role of Technological Innovation Capability
Authors: Yang Xiaozhuang , Wu Dejian , Zheng Zhizhe
Published: August 2022

With the growth and development of Construction 4.0, new technologies such as BIM, Big Data, and the Internet of Things are commonly used. These digital technologies play a critical role in fostering firm innovation and also have a major impact on firm performance. Based on panel data of 33 listed construction firms in China’s construction industry from 2015 to 2020, this paper uses regression analysis and mediation analysis methods to empirically examine the relationship between Construction 4.0, technological innovation capabilities, and firm performance. The results demonstrate that Construction 4.0 has a significant positive promotional effect on the firm performance, while technological innovation capabilities mediate between Construction 4.0 and the firm performance. Based on these findings, it is suggested that construction firms should pay attention to the new technologies brought by Construction 4.0, increase investment in research and development, actively cultivate technological innovation capabilities, and build technological innovation networks, so as to promote digital transformation of construction firms.
Research on Multi Machine Cooperative Autonomous Inspection Strategy for UHV Dense Transmission Channel Based on 5G Technology
Authors: Li Long , Cheng Liangliang , Li Xiang , Yue Lingping , Zhang Hongbin
Published: August 2022

With the continuous progress of UAV technology and 5G technology, the safety and reliability of UAV are gradually improved. In addition, UAV has many advantages, such as light weight, small size, low cost, and fast response in view of the low economy, high labor intensity, low efficiency, and other problems of the traditional inspection of UHV intensive transmission channels. This paper proposes a multi machine collaborative autonomous inspection scheme for UHV dense transmission channels based on 5G technology. This method is to realize the intelligent detection service for UHV dense transmission channels by building a self-service inspection model under the joint cooperation of 5G technology and UAV collaborative operation technology. The research of this paper shows that the multi machine coordinated autonomous inspection scheme of UHV dense transmission channel based on 5G technology constructed in this paper is not only more efficient but also safer than the traditional inspection scheme and single UAV inspection scheme. The related technologies can not only improve the maintenance efficiency of power grid dense transmission channel but also provide theoretical and technical reference for the improvement of multi machine coordinated technology.
Deep Learning Algorithm for Online College Physical Education Teaching with Flipping Classroom
Authors: Chen Zhengqiang
Published: August 2022

In view of the inability to accurately analyze the application of deep learning in college physical education teaching design from the perspective of flipping classroom, this paper puts forward an improved deep learning method based on the integration of flipping classroom vision and deep learning, which can reduce the design ability of physical education teaching design in college physical education teaching design and improve the level of college physical education teaching design. Firstly, the initial data set is established by using the theory of flipping classroom horizon, so that the data meet the requirements of normal distribution and reduce the differences between teaching data; Then, the physical education teaching design is divided into different subdesigns by using the theory of flipping classroom horizon. Find the best design result in this domain in each subinstructional design; Finally, under the guidance of the theory of flipping classroom horizon, each subdesign realizes the optimal allocation of teaching resources. MATLAB simulation shows that under the conditions of initial design scheme and teaching resources setting, the improved deep learning method can improve the accuracy of physical education teaching design and shorten the convergence time of design, which is superior to the original deep learning method. Therefore, the deep learning method is used to analyze the instructional design of college physical education, which has a good design effect and is suitable for the instructional design of college physical education.
Fuzzy Theory-Based Tab Analysis of Art Education Evaluation Index
Authors: Fu Yinping , Min Weixi , Liu Li , Wang Baoqi
Published: August 2022

Art teaching evaluation is the most important part of the whole art teaching activity, and it is also a part that is easily ignored. The traditional teaching evaluation method ignores the identity of students as evaluators and also ignores the colorful personalities of students in art teaching. The promotion of all students’ enthusiasm for art learning, stimulating and maintaining all students’ interest in art learning, self-knowledge, and innovation consciousness, is obviously insufficient. Based on the method of fuzzy decision-making, this paper proposes a fuzzy evaluation method of teaching quality, formulates an evaluation index system, ends some problems existing in the traditional method, and achieves good results in teaching practice. The research results of the article show the following: (1) The scores of the four first-level indicators are in a good stage, and the scores are generally maintained above 4.0. Among them, the highest score of art teaching design can reach 5.7, indicating that the influence on art teaching is relatively large, and it should be paid attention to in the process of daily teaching. (2) The model proposed in this article has a running accuracy of 95.61% in the training set and 91.45% in the validation set, although the performance of the three detection models is reduced to a certain extent after the test set is run. However, the accuracy of the model in this paper has the least room for decline, only 4.16%. The decline values of the other two models are 9.47% and 12.72%, respectively, and the detection value of the model in the article is still the highest among all detection models. According to the PR curves of the three models, the balance point of the fuzzy decision-making education model is 0.8, the deep learning model is 0.6, and the BP neural network is 0.4. The balance point of the fuzzy decision-making education model is larger than of the other two models; that is, the fuzzy decision-making model has a performance that is better than the other two models.
Forecasting Exchange Rate of Pakistan Using Time Series Analysis
Authors: Akhtar Sohail , Ramzan Maham , Shah Sajid , Ahmad Iftikhar , Khan Muhammad Imran , Ahmad Sadique , El-Affendi Mohammed A. , Qureshi Humera
Published: August 2022

Exchange rates are crucial in regulating the foreign exchange market's dynamics. Because of the unpredictability and volatility of currency rates, the exchange rate prediction has become one of the most challenging applications of financial time series forecasting. This study aims to build and compare the accuracy of various methods. The time series model Auto-Regressive Integrated Moving Average (ARIMA) and Generalized Auto-Regressive Conditional Heteroscedasticity (GARCH) are utilized to forecast the daily US dollar to Pakistan rupee currency exchange rates (USD/PKR). Lagged observations of the data series and moving average technical analysis are used in both models. Explanatory factors were used as indicators, and the prediction performance was assessed using a variety of commonly known statistical metrics. These statistical metrics suggested the presence of conditional heteroscedasticity. Thus, the process turns to capture the volatility effect of conditional heteroscedasticity through GARCH modeling. It may be inferred based on the results of tentative models; that the ARCH model outperforms the GARCH model in terms of predicting the USD/PKR exchange rate.
A Lightweight Hybrid Dilated Ghost Model-Based Approach for the Prognosis of Breast Cancer
Authors: Ramirez-Asis Edwin , Bolivar Romel Percy Melgarejo , Gonzales Leonid Alemán , Chaudhury Sushovan , Kashyap Ramgopal , Alsanie Walaa F. , Viju G. K.
Published: August 2022

Most approaches use interactive priors to find tumours and then segment them based on tumour-centric candidates. A fully convolutional network is demonstrated for end-to-end breast tumour segmentation. When confronted with such a variety of options, to enhance tumour detection in digital mammograms, one uses multiscale picture information. Enhanced segmentation precision. The sampling of convolution layers are carefully chosen without adding parameters to prevent overfitting. The loss function is tuned to the tumor pixel fraction during training. Several studies have shown that the recommended method is effective. Tumour segmentation is automated for a variety of tumour sizes and forms postprocessing. Due to an increase in malignant cases, fundamental IoT malignant detection and family categorisation methodologies have been put to the test. In this paper, a novel malignant detection and family categorisation model based on the improved stochastic channel attention of convolutional neural networks (CNNs) is presented. The lightweight deep learning model complies with tougher execution, training, and energy limits in practice. The improved stochastic channel attention and DenseNet models are employed to identify malignant cells, followed by family classification. On our datasets, the proposed model detects malignant cells with 99.3 percent accuracy and family categorisation with 98.5 percent accuracy. The model can detect and classify malignancy.
Extreme Gradient Boosting Algorithm for Predicting Shear Strengths of Rockfill Materials
Authors: Ahmad Mahmood , Al-Mansob Ramez A. , Kashyzadeh Kazem Reza , Keawsawasvong Suraparb , Sabri Sabri Mohanad Muayad , Jamil Irfan , Alguno Arnold C.
Published: August 2022

For the safe and economical construction of embankment dams, the mechanical behaviour of the rockfill materials used in the dam’s shell must be analyzed. The characterization of rockfill materials with specified shear strength is difficult and expensive due to the presence of particles greater than 500 mm in diameter. This work investigates the feasibility of using an extreme gradient boosting (XGBoost) computing paradigm to estimate the shear strength of rockfill materials. To train and validate the proposed XGBoost model, a total of 165 databases obtained from the literature are chosen. The XGBoost model was compared against support vector machine (SVM), adaptive boosting (AdaBoost), random forest (RF), and K‐nearest neighbor (KNN) models described in the literature. XGBoost beats SVM, RF, AdaBoost, and KNN models in terms of performance evaluation metrics such as coefficient of determination (R2), Nash–Sutcliffe coefficient (NSE), and error in the root mean square ratio (RMSE) to the standard deviation of the measured data (RSR). The results demonstrated that the XGBoost model has the highest prediction performance with (R2 = 0.9707, NSE = 0.9701, and RSR = 0.1729), followed by the SVM model with (R2 = 0.9655, NSE = 0.9639, and RSR = 0.1899), RF (R2 = 0.9545, NSE = 0.9542, and RSR = 0.2140), the AdaBoost model with (R2 = 0.9390, NSE = 0.9388, and RSR = 0.2474) and the KNN model with (R2 = 0.6233, NSE = 0.6180, and RSR = 0.6181). A sensitivity analysis has been conducted to ascertain the impact of each investigated input parameter. This study demonstrates that the established XGBoost model for estimating the shear strength of rockfill materials is reliable.
Nonadherence Predictors to Tuberculosis Medications among TB Patients in Gambella Region of Ethiopia
Authors: Kebede Taye , Gach Jing Wiw , Girma Abiot , Woldemichael Kifle
Published: August 2022

Background. Global tuberculosis (TB) disease deaths rise comparable to the one seen in 2015 (by 200,000) or even in 2012 (by 400,000) as a result of the potential impact of the COVID-19 pandemic. Ethiopia’s Gambella region is leading for years in terms of TB cases and its comorbidities. The TB control program effectiveness depends on in large on the patients completing the appropriate treatment regimen. Hence, the objective of this study was to determine the determinants of nonadherence to anti-TB drug treatment among patients in Gambella regional state of Ethiopia. Methods. A case-control study was conducted on cohorts of TB patients sampled from four public health facilities in Gambella Region from January 2019 to 2020, followed by 18 months of follow-up. The total sample size was 296 patients (74 cases and 222 controls) with a response rate of 97.3% (288 : 72 nonadhered cases and 216 controls). Cases (nonadhered) were TB patients who missed 10% of the doses while controls were patients, who completed 90% or more doses. Results. TB patients, who perceived stigma [AOR = 2.7 at 95% CI (1.1–6.6) with

P

value <0.05], failed to receive any counseling during the treatment course [AOR = 65.24 at 95% CI (11.69–363.95) with

P

value <0.01], patients who used to smoking during treatment [AOR = 15.4 at 95% CI (7.7–30) with

P

value <0.01], taking TB medications regularly has no benefits [AOR = 6.8 at 95% CI (1.8–24.9) with

P

value <0.05], and patients believing TB disease as not severe [AOR = 8.38 at 95% CI (2.0–34.6) with

P

value <0.05] were significantly or highly significantly associated with nonadherence to anti-TB drugs medications. Conclusion. The determinants of nonadherence to anti-TB treatment among TB patients in the Gambella region during the study period were the absence of counselling services, and patients’ behavior (smoking habits, undermining the severity of TB disease, lack of trust in the outcomes of regular medications, and perceived stigmatization). Accordingly, capacitating healthcare providers and workers at all TB clinics for effective counseling , preventing perceived stigma by protecting the patient’s secrecy, and routine health education has paramount importance for effective TB control in Gambella.
A Cohort Study of the Effects of Integrated Medical and Nursing Rounds Combined with AIDET Communication Mode on Recovery and Quality of Life in Patients Undergoing Percutaneous Coronary Intervention
Authors: Li Lan , Li Yongheng , Yin Tao , Chen Jinglin , Shi Fengjiao
Published: August 2022

Objective. To explore the influence of the communication mode of “Acknowledge, Introduce, Duration, Explanation, and Thanks (AIDET)” on the postoperative recovery and quality of life of patients undergoing percutaneous coronary intervention. Methods. Sixty patients with percutaneous coronary intervention in our hospital from April 2019 to April 2021 were selected. The patients were randomly divided into a control group (

n
=
30

) and research group (

n
=
30

). The control group received integrated medical and nursing rounds, and the research group received integrated medical and nursing rounds combined with AIDET communication mode. The scores of nursing satisfaction, cardiac function, self-nursing ability, short-term prognosis, and quality of life were compared between the two groups. Results. In the comparison of nursing satisfaction between the two groups, the satisfaction of the research group was low in 1 case, moderate in 6 cases, and high in 27 cases, with a satisfaction rate of 96.67%. In the control group, there were 7 cases with low satisfaction, 10 cases with moderate satisfaction, and 13 cases with high satisfaction, with a satisfaction rate of 76.67%. The nursing satisfaction of the research group was higher than that of the control group, and the difference was statistically significant, and the difference was statistically significant (

P
<
0.05

). After intervention, the cardiac function of the two groups was improved. The LVEF and LVESVI of the research group were higher than those of the control group, while the WMSI of the research group was lower than that of the control group (

P
<
0.05

). In the comparison of self-nursing ability, the self-nursing maintenance, self-nursing management, self-nursing confidence, and total score of self-nursing in the research group were significantly higher than those in the control group, and the difference was statistically significant (

P
<
0.05

). The incidence rates of acute myocardial infarction (AMI), revascularization, arrhythmia, heart failure, cardiogenic shock, and cardiac death in the research group were obviously lower than those in the control group, and the difference was statistically significant (

P
<
0.05

). After intervention, the scores of quality of life of the two groups decreased, and the scores of physiological function, psychological function, social function, and health self-cognition in the research group were lower than those in the control group (

P
<
0.05

). Conclusion. Medical and nursing integrated ward rounds combined with AIDET communication mode can effectively improve the prognosis of patients undergoing percutaneous coronary intervention to promote the establishment of a harmonious nurse-patient relationship. The patients’ self-care ability is able to be effectively enhanced.
Efficacy and Mechanisms of Oleuropein in Postmenopausal Osteoporosis
Authors: Liu Huilan , Zhao Aiguo , Huang Yulu , Hou Anli , Miao Wenbin , Hong Lu , Deng Nina , Fan Yujuan
Published: August 2022

Background. Postmenopausal osteoporosis (PMOP) has a supernal morbidity rate in elderly females. Objective. To appraise the effects of oleuropein on bone densitometry, bone metabolic index, oxidative stress, and inflammatory index in PMOP. In addition, the mechanism of olive bittersweet preventing bone loss was explored. Methods. We grouped 80 salubrious female Sprague-Dawley rats into four teams: (1) sham operation team (sham,

N
=
20

), (2) ovariectomy (OVX,

N
=
20

), (3) castrated mice fed with oleuropein (OVX+ole,

N
=
20

), and (4) castrated mice fed with estrogen (OVX+E2,

N
=
20

). The ovariectomized SD rats were continuously raised with 200 μg/kg/dose of oleuropein. Bone mineral density and bone metabolism indexes were recorded. In order to assess the effectiveness of oleuropein on osteopenia, an enzyme-linked immunosorbent assay (ELISA) was devoted to examining the bone marrow indexes. The bone metabolism standards of PMOP rats were appraised by assessing serum levels of calcium, alkaline phosphatase (ALP), phosphorus, malondialdehyde (MDA), and nitrate content by experimental detection methods and levels of osteoclastogenesis inhibitory factor (OPG) and receptor activator for nuclear factor-κB ligand (RANKL) by ELISA. The OPG-RANK-RANKL signal passage was examined by Western blot (WB). We measured bone mineral density using dual-energy X-rays. Results. Our animal experimental results indicated that oleuropein could significantly improve the bone mineral density of ovariectomized SD rats. In the meantime, it could reduce ending interleukin-6 (IL-6), malondialdehyde (MDA), nitrate, alkaline phosphatase (ALP), and phosphorus (P) serum concentration and would not affect Ca2+ concentration. In cell experiments, oleuropein also can promote the proliferation of osteoblasts. Furthermore, it can promote the expression of OPG protein and mRNA. In reverse, it inhibits the expression of RANKL protein and mRNA. Conclusion. Oleuropein can not only improve the inflammatory and oxidative indexes of castrated rats but also prevent osteoporosis. Oleuropein avoids bone resorption by regulating OPG/RANKL expression.
Analysis of Vertical Distribution of Ozone in Winter and Its Transport from Stratosphere to Troposphere in the Pearl River Delta Region of China
Authors: Li Cuihua , Li Yangbin , Peng Jingman , Chen Ying
Published: August 2022

The vertical distribution of winter ozone in the Pearl River Delta in 2021 was analyzed using electrochemical concentration cell (ECC) ozonesonde and compared with the ozone Light detection and ranging (LiDAR) data. The transport of stratospheric ozone to the troposphere was also explored. The results show that (1) the maximum value of the stratospheric ozone layer was about 25 km. The stratospheric ozone profile is mainly unimodal, and the stratospheric ozone content was much higher than that of the troposphere. In the troposphere, the ozone content near the ground (0-2 km) was slightly higher than that between 5 and 15 km. The ozone profile in the upper and middle troposphere showed a peak structure, which was mainly divided into single peak (22%) and multipeak (77%) profiles. (2) In the middle and lower troposphere, the vertical profile of ozone detected by LiDAR is significantly different from that detected by sounding system. The difference between the two ranged from 10 ppb to 60 ppb at the same height. Ozone sounding can supplement the blind area of the near-ground layer by LiDAR ozone detection and can calibrate the inversion results of LiDAR. (3) On January 5, 2022, stratospheric ozone was transported to the troposphere. The stratospheric intrusion occurred due the high wind speed of the subtropical jet centre over Qingyuan and due to strong subsidence movement. When the stratospheric air mass moved to the troposphere, and subsidence airflow encountered, the ozone concentration near the ground was rapidly increased in a short time. It was identified as an “exceptional event.”
Disturbance Observer-Smith Predictor Compensation-Based Platoon Control with Estimation Deviation
Authors: Wang Jiawei , Wu Guanpu , Sun Bohua , Ma Fangwu , Aksun-Guvenc Bilin , Guvenc Levent
Published: August 2022

In the research of cooperative adaptive cruise control, the coupling relationship between the communication delay, the following time headway, and the string stability leads to a stringent limit on the minimum allowable following time headway. To deal with this limitation, this paper proposes the Disturbance Observer-Smith Predictor Compensation (DOB-SPC)-based Master-Slave architecture. The SPC is adopted to move the communication delays and actuator delays outside the feedback loop in the Master-Slave architecture. It theoretically realizes decoupling when parameters are estimated accurately and achieves zero-headway-string-stability for arbitrary values of communication delay. Subsequently, the robust performance of SPC with estimation deviation of vehicle model dynamic lag, actuator delay, and communication delay in practical application is discussed through the changing trend of the minimum string-stable time headway. To alleviate this problem, the DOB is designed to compensate for the interference caused by the perturbation of vehicle dynamic parameters and improve the estimation accuracy. The simulation results of a four-vehicular platoon show that the string stability and following accuracy are fully guaranteed by applying the proposed strategy, even with smaller headway in the presence of estimation deviation.
Mathematical Modeling to Determine the Fifth Wave of COVID‐19 in South Africa
Authors: Sunthrayuth Pongsakorn , Khan Muhammad Altaf , Alshammari Fehaid Salem
Published: August 2022

The aim of this study is to predict the COVID‐19 infection fifth wave in South Africa using the Gaussian mixture model for the available data of the early four waves for March 18, 2020‐April 13, 2022. The quantification data is considered, and the time unit is used in days. We give the modeling of COVID‐19 in South Africa and predict the future fifth wave in the country. Initially, we use the Gaussian mixture model to characterize the coronavirus infection to fit the early reported cases of four waves and then to predict the future wave. Actual data and the statistical analysis using the Gaussian mixture model are performed which give close agreement with each other, and one can able to predict the future wave. After that, we fit and predict the fifth wave in the country and it is predicted to be started in the last week of May 2022 and end in the last week of September 2022. It is predicted that the peak may occur on the third week of July 2022 with a high number of 19383 cases. The prediction of the fifth wave can be useful for the health authorities in order to prepare themselves for medical setup and other necessary measures. Further, we use the result obtained from the Gaussian mixture model in the new model formulated in terms of differential equations. The differential equations model is simulated for various values of the model parameters in order to determine the disease’s possible eliminations.
Notas sobre artículos 47 y 48
Authors: Atzeni Mauricio
Published: August 2022

Los artículos 47 y 48 de la propuesta para la nueva Constitución representan un avance importante en la defensa de los derechos de los y las trabajadores/as y pondrían el sistema de relaciones industriales de Chile en sintonía con los existentesen los países más socialmente avanzados. Continuar leyendo...
Empleo público y Servicio Civil en la nueva Constitución
Authors: Abarzúa Eduardo
Published: August 2022

Junto a más de un centenar de personas, de un amplio espectro, presentamos a la Convención Constitucional (CC) la iniciativa popular “Propuesta constitucional para garantizar un Servicio Civil profesional e imparcial para Chile”, pero no logramos reunir el número suficiente de firmas para ser considerada. Continuar leyendo...
Acceso a la información pública en la nueva Constitución
Authors: Mercado Beatriz
Published: August 2022

Cuando en abril de 2009 entraba en vigencia la ley 20.285 de Transparencia y Acceso a la Información Pública, el Estado extendía un poder significativo al ciudadano y ciudadana común. La nueva norma buscaba resguardar el principio de publicidad de los organismos públicos y el derecho de las personas a informarse del funcionamiento de los mismos, de modo de reforzar el rol fiscalizador de la ciudadanía y evitar así actos de corrupción y abusos de poder. Continuar leyendo...
Propuesta de nueva Constitución
Authors: Escobar Claudio
Published: August 2022

En los últimos años, la evolución de las tecnologías de la información y comunicación ha abierto una serie de oportunidades y generado diversos beneficios para quienes pueden acceder a ellas. Dichos beneficios abarcan los diversos ámbitos en la vida de las personas: laboral, educacional, social, personal, entre muchas otras. Sin embargo, en la actualidad y por diversas razones, no todas las personas cuentan con un acceso permanente a las tecnologías, incluso a las más comunes. Continuar leyendo...
Effect of a Multistrain Probiotic on Leaky Gut in Patients with Diarrhea-Predominant Irritable Bowel Syndrome: A Pilot Study
Authors: Ait Abdellah Samira , Gal Caroline , Laterza Lucrezia , Velenza Venanzio , Settanni Carlo Romano , Napoli Marco , Schiavoni Elisa , Mora Vincenzina , Petito Valentina , Gasbarrini Antonio
Published: August 2022

Background: A probiotic mixture prevented epithelial barrier impairment in various experimental models. The objective was to evaluate its effects in patients suffering from IBS with diarrhea (IBS-D) with confirmed leaky gut. Methods: IBS-D patients with increased intestinal permeability measured by radionuclide tracers were enrolled in this pilot, open-label, prospective, interventional, single-center, Phase IV study. Patients received two capsules of a multistrain probiotic a day for 30 days and were evaluated by repeated intestinal permeability tests, the Bristol Stool Scale, and patient-perceived quality of life and satisfaction. Results: Of the 30 enrolled patients (mean age: 42.1 [SD: 13.1] years; female: 60%), 27 completed the study (full analysis set [FAS]), and 18 had no major protocol violation (per protocol set [PPS]). On D30, an improvement of intestinal permeability was observed in 81.5% of patients in FAS, normalization being observed in 37% of the participants (44% in PPS). The mean intestinal permeability was significantly decreased: baseline minus D30, 3.4 (95% CI: 1.7, 5.2); the IBS-QOL total score was significantly increased: D30 minus baseline, 8.0 (95% CI: 3.0, 12.9); and stool consistency was significantly improved. On D15 and D30, 96.3% of patients claimed that their IBS symptoms had been satisfactory alleviated, and a significant improvement was reported for the following VAS-IBS items: abdominal pain, diarrhea, and impact of gastrointestinal problems in daily life. Compliance and tolerance were satisfactory. Conclusion: The multistrain probiotic tested may reduce intestinal permeability in a considerable proportion of patients and may improve abdominal pain, stool consistency, and quality of life. These results pave the way for larger, placebo-controlled clinical studies.
Embates entre contracultura e socialismo: disputas simbólicas na imprensa alternativa brasileira durante a ditadura militar
Authors: Pedro Neto Leopoldo
Published: August 2022

O artigo tem por objetivo tecer algumas reflexões sobre as disputas simbólicas entre as diferentes frações das esquerdas no lócus da imprensa alternativa brasileira durante a ditadura militar (1964-1985). Do ponto de vista teórico, a pesquisa se ampara na discussão histórica sobre imprensa alternativa e a sua relação com as esquerdas do período. Na vertente metodológica, busca-se, a partir da divisão categórica de Kucinski (2018), entre jornais existenciais e jornais políticos, compreender como essa ramificação no subcampo da imprensa alternativa manifestou-se nos depoimentos de jornalistas resistentes à ditadura. Empiricamente, apreende-se que o tensionamento em questão, influenciado por movimentos político-culturais mais amplos, foi responsável por condicionar aspectos profissionais, organizacionais e políticos dos periódicos alternativos.
Comunicação organizacional contemporânea: uma atualização necessária
Authors: Nogueira Pedro Arthur
Published: August 2022

Resenha
Ensino e prática da pesquisa em comunicação organizacional e relações públicas no contexto pandêmico
Authors: Barichello Eugenia Maria Mariano da Rocha , Fernandes Fábio  Frá
Published: August 2022

Diante da ressignificação sócio-organizacional imposta pela pandemia da covid-19, nosso texto, com caráter acadêmico-científico, reflete os desafios do ensino e prática da pesquisa. Ademais, apresenta alguns exercícios entendidos por nós como facilitadores do labor científico da investigação no âmbito da metodologia acadêmica, inserida na modalidade de ensino remoto emergencial para os cursos de graduação em Relações Públicas.
Silêncio, conflito ou denúncia? A vulnerabilidade dos sujeitos entre a autonomia e heteronomia nos ambientes organizacionais
Authors: Farias Luiz Alberto de , Paraventi Ágatha Camargo
Published: August 2022

Este artigo reflete sobre o fenômeno do desenvolvimento da cultura moral nos ambientes organizacionais, problematizando o papel e os significados dos processos de escuta e participação que podem promovê-lo. Observamos o que influencia a posição de vulnerabilidade dos sujeitos que se dispõem, por responsabilidade moral, a contribuir para evitar desvios de conduta. A partir do fenômeno do silêncio organizacional, discutimos a importância da comunicação como espaço relacional que encoraja o conflito para construir o código moral da cultura.
Long-run Trends in the U.S. SES—Achievement
Gap
Authors: Hanushek Eric A. , Light Jacob D. , Peterson Paul E. , Talpey Laura M. , Woessmann Ludger
Published: August 2022

Rising inequality in the United States has raised concerns about potentially widening gaps in educational achievement by socioeconomic status (SES). Using assessments from LTT-NAEP, Main-NAEP, TIMSS, and PISA that are psychometrically linked over time, we trace trends in SES gaps in achievement for U.S. student cohorts born between 1961 and 2001. Gaps in math, reading, and science achievement between the top and bottom quartiles of the SES distribution have closed by 0.05 standard deviation per decade over this period. The findings are consistent across alternative measures of SES and subsets of available tests and hold in more recent periods. At the current pace of closure, the achievement gap would not be eliminated until the second half of the 22nd century.
Visualizing academic descendants using modified Pavlo diagrams: Results based on five researchers in biomechanics and biomedicine
Authors: Lievers W. Brent
Published: August 2022

Visualizing the academic descendants of prolific researchers is a challenging problem. To this end, a modified Pavlo algorithm is presented and its utility is demonstrated based on manually collected academic genealogies of five researchers in biomechanics and biomedicine. The researchers have 15–32 children each and between 93 and 384 total descendants. The graphs generated by the modified algorithm were over 97% smaller than the original. Mentorship metrics were also calculated; their hm-indices are 5–7 and the gm-indices are in the range 7–13. Of the 1,096 unique researchers across the five family trees, 153 (14%) had graduated their own PhD students by the end of 2021. It took an average of 9.6 years after their own graduation for an advisor to graduate their first PhD student, which suggests that an academic generation in this field is approximately one decade. The manually collected data sets used were also compared against the crowd-sourced academic genealogy data from the AcademicTree.org website. The latter included only 45% of the people and 34% of the connections, so this limitation must be considered when using it for analyses where completeness is required. The data sets and an implementation of the algorithm are available for reuse.
Predatory Politics and the Indigenisation and Economic Empowerment Policy in Zimbabwe’s Mining Sector
Authors: Nkala Sizo
Published: August 2022

This paper explores the unfolding of Zimbabwe’s indigenisation policy in the country’s mining sector from the early 1990s to 2018. Informed by interviews, government reports, newspaper articles and online material, the article examines the attempts to indigenise some of the country’s biggest mining concerns, like the platinum giants Mimosa, Zimplats and Unki platinum, which are all owned by multinationals. It also delves deeper into the indigenisation efforts by other mining giants, like Metallon Gold, Duration Gold, Freda Rebecca and RioZim. In the chrome sector it recounts the experiences of ZimAlloys and Zimasco. An examination of the indigenisation process in these mining concerns revealed how the policy was turned into a political elite accumulation spree. The ruling party heavyweights, members of the military and politically connected individuals frequently turned up as part of various indigenous consortia assembled to acquire shares in the mining companies as part of the indigenisation policy.
The Linz Zoocode project. Second report of activities (2020).
Nomenclatural availability. 1. What is nomenclatural availability?
Authors: DUBOIS ALAIN , ANEESH PANAKKOOL THAMBAN , BAUER AARON M. , CERÍACO LUIS M. P. , DANIEL GIMO M. , FRÉTEY THIERRY , LÖBL IVAN , LORVELEC OLIVIER , MARINOV MILEN , OHLER ANNEMARIE , SCHMITT MICHAEL , WHITTINGTON ANDREW , AESCHT ERNA
Published: August 2022

This second report of activities of the Linz Zoocode Committee is devoted to a careful analysis of the concept of nomenclatural availability in zoological nomenclature, a concept often misunderstood and misused in recent taxonomic publications. It provides a definition of this expression and establishes a new nomenclatural principle, the Principle of Availability. It addresses a number of terminological problems related to this concept and makes new proposals regarding this terminology.
Harveya kiangombensis (Orobanchaceae), a new parasitic species from Kenya, East Africa
Authors: NGUGI GRACE , KIRIKA PAUL M. , MWACHALA GEOFFREY
Published: August 2022

A new holoparasitic species of Orobanchaceae, Harveya kiangombensis, is here described and illustrated. This species is easily distinguished from the closely related H. liebuschiana by its glandular pubescent pedicels, the position of its flowers that occur singly in the leaf axils, and its acute calyx lobes. An assessment of the conservation status of the new species is provided.
Study on the Chinese Subfamily Anabropsinae (Orthoptera: Anostostomatidae) VI: One new species of Anabropsis (Pteranabropsis) from Yunnan Province
Authors: LU XIANGYI , ZHANG QIANWEN , BIAN XUN
Published: August 2022

This paper is sixth study the Chinese Anabropsinae and reports one new species from Yunnan Province, China, viz. A. (Pteranabropsis) maguanensis sp. nov. (Chinese name: 马关黯螽). Meanwhile, the complete mitochondrical genome of the new species was determined and annotated. The 15, 962 bp circle genome consisted of 13 protein-coding, 22 transfer RNA, 2 ribosomal RNA genes, and an A+T-rich region. It has the typical invertebrate mitochondrial gene arrangement. All protein-coding genes (PCGs) were initiated by typical ATN codon. The nucleotide compositions were significant bias towards AT. All transfer RNA (tRNA) genes had a typical clover-leaf structure, except trnS1 in which the base pairs of the dihydrouridine (DHU) arm was lacking. Overall, six domains and 49 helices were predicted for rrnL, and three structural domains and 27 helices were predicted for rrnS.