bluuebunny/crossref_metadata_2025 huggingface dataset:
Interconnected CeO2 Nanofibers for Enhanced CO Gas Sensing
Authors: Zhang Wenchao , Zhao Nie , Liu Yongrong , Li Bo
Published: February 2022

Developing a new type of CO gas sensor with high response, good reproducibility, and short response/recovery time is of great significance in medical fields, especially during anesthesia. During mechanical ventilation, CO gas will be produced by CO2 absorbent. Herein, novel interconnected CeO2 nanofibers with an average diameter of 150 nm are firstly prepared by electrospinning. The results show that the received nanofibers are mainly composed of fluorite-structured CeO2 crystals with oxygen vacancies as well as the adsorbed oxygen species on the fiber surface. It is found that there is no agglomeration and sintering for the nanofibers even after annealing at 1000°C. The interconnected nanofibers exhibit excellent gas sensing performance to CO gas at an optimum operating temperature of 450°C, where the gas sensing response value is 2.82. And the nanofibers also exhibit excellent gas sensing reproducibility, fast response/recovery rate (2 s/4 s), and high response value-concentration correlation toward CO. This study provides a simple approach to interconnected CeO2 nanofibers for potential gas sensor application.
Defining Diffuse Large B-Cell Lymphoma Immunotypes by CD8+ T Cells and Natural Killer Cells
Authors: Qi Jing , Xu Lu , Huang Dongping , He Hesheng , Yao Junping , Zhang Jing , Xu Youhai , Yang Li
Published: February 2022

Background. There is a poor prognosis for diffuse large B-cell lymphoma (DLBCL), one of the most common types of non-Hodgkin lymphoma (NHL). Through gene expression profiles, this study intends to reveal potential subtypes among patients with DLBCL by evaluating their prognostic impact on immune cells. Methods. Immune subtypes were developed based on CD8+ T cells and natural killer cells calculated from gene expression profiles. The comparison of prognoses and enriched pathways was made between immune subtypes. Following this validation step, samples from the independent data set were analyzed to determine the correlation between immune subtype and prognosis and immune checkpoint blockade (ICB) response. To provide a model to predict the DLBCL immune subtypes, machine learning methods were used. The virtual screening and molecular docking were adopted to identify small molecules to target the immune subtype biomarkers. Results. A training data set containing 432 DLBCL samples from five data sets and a testing dataset containing 420 DLBCL samples from GSE10846 were used to develop and validate immune subtypes. There were two novel immune subtypes identified in this study: an inflamed subtype (IS) and a noninflamed subtype (NIS). When compared with NIS, IS was associated with higher levels of immune cells and a better prognosis for immunotherapy. Based on the random forest algorithm, a robust machine learning model has been established by 12 hub genes, and the area under the curve (AUC) value is 0.948. Three small molecules were selected to target NIS biomarkers, including VGF, RAD54L, and FKBP8. Conclusion. This study assessed immune cells as prognostic factors in DLBCL, constructed an immune subtype that could be used to identify patients who would benefit from ICB, and constructed a model to predict the immune subtype.
Response to 1-Year Fixed-Regimen Bevacizumab Therapy in Treatment-Naïve DME Patients: Assessment by OCT Angiography
Authors: Hunt Magdalena , Teper Sławomir , Wylęgała Adam , Wylęgała Edward
Published: February 2022

Purpose. To evaluate the effectiveness of intravitreal bevacizumab treatment in patients with diabetic macular edema (DME) by assessing retinal changes using optical coherence tomography angiography (OCT-A). Methods. This prospective study was performed in patients with treatment-naïve DME. The eyes of patients were imaged using a swept-source OCT system with a scan area of

6
×
6

 mm. The DME patients with a central macular thickness (CMT) of ≥300 μm received nine bevacizumab injections within 12 months. The demographic, systemic, and ocular parameters, including the best-corrected visual acuity (BCVA), CMT, microaneurysm (MA) count, and foveal avascular zone (FAZ) area in both superficial capillary plexus (SCP) and deep capillary plexus (DCP), as well as vessel density in SCP, were assessed in the patients. In addition, the response (good or poor) of the DME eyes to bevacizumab treatment and the final visual acuity (BCVA of 75 letters) were analyzed. Results. Seventy-seven eyes of DME patients were subjected to the final analysis. Bevacizumab treatment reduced CMT from 425.06 μm (±77.15) to 350.25 μm (±82.04) and improved BCVA by about 8.61 letters (from 64.73 to 73.34) in the patients. The mean number of MAs in SCP decreased from

3.51
±
2.07

to

2.31
±
1.15

(

p
<
0.001

) and in DCP from

17.12
±
11.56

to

12.21
±
6.99

(

p
<
0.001

), whereas the area of FAZ increased in SCP from

328.22
±
131.38

to

399.70
±
156.98

(

p
<
0.001

) and in DCP from

571.13
±
396.01

to

665.89
±
412.77

(

p
=
0.001

). The final BCVA letter score and CMT were statistically significant in both poor and good responders, as well as in

BCVA
<
75

and

BCVA
≥
75

groups. Conclusion. The fixed-regimen intravitreal bevacizumab therapy was effective in treating DME. Apart from noninvasive visualization of microvascular damage, OCT-A showed limited usefulness in predicting treatment response. Although the study showed that the number of MAs was significantly reduced during treatment, which is an OCT-A predictor of a good response to bevacizumab treatment at a 12-month visit, commonly observed artifacts may reduce the usefulness of OCT-A.
α-Tocopherol Prevents Sperm Apoptosis and Necrosis in Rats Exposed to 2,3,7,8-Tetrachlorodibenzo-p-dioxin
Authors: Meles Dewa Ketut , Rachmawati Kadek , Hamid Iwan Sahrial , Mustofa Imam , Wurlina Wurlina , Suwasanti Niluh , Putri Desak Ketut Sekar Cempaka , Utama Suzanita
Published: February 2022

2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is a persistent organic pollutant that induces overproduction of reactive oxygen species (ROS). Studies on avoiding the adverse effects of dioxin pollution exposure are needed in all aspects, including reproductive health. This study aimed to determine the effect of α-tocopherol on superoxide dismutase (SOD) and malondialdehyde (MDA) levels, live spermatozoa, apoptosis, and necrosis in male rats exposed to dioxin as a model. Thirty healthy 12-week-old male rats were randomly divided into five groups. Rats in the control group were given corn oil twice daily at 4-hour intervals. The remaining rats were given TCDD 700 mg/kg BW daily, followed by administration of corn oil and α-tocopherol at doses of 77, 140, and 259 mg/kg BW/d for T0, T1, T2, and T3 groups, respectively. The treatments were conducted for 45 days; all rats were euthanized to collect blood and testicular samples on day 46. The results showed that exposure of TCDD resulted in a decrease in SOD activity and live spermatozoa and increased MDA level and death, apoptosis, and necrosis of spermatozoa (T0) compared to the control (C) group (p < 0.05). The administration of α-tocopherol, starting from the doses of 77 (T1), 149 (T2), and 259 mg (T3) per kg BW, was sequentially followed by returning MDA levels, recovering SOD activities, and restoration in the percentage of living, dead, apoptotic, and necrotic spermatozoa, similar (p > 0.05) to those of the control group. It could be concluded that the administration of α-tocopherol resolves the harmful effects of TCDD on the viability of spermatozoa in rats as a model.
The Application of DEMATEL-ANP in Livestream E-Commerce Based on the Research of Consumers’ Shopping Motivation
Authors: Cheng Haonan , Huang Yi-Ting , Huang Jesheng
Published: February 2022

With the rapid development of e-commerce in China and the global pandemic of COVID-19, more and more sales personnel and brands have abandoned the physical retail industry and started investing in e-commerce. The consumer culture of livestream e-commerce is becoming popular in China. However, a report from Southern Finance Omnimedia Corp of China pointed out that among China's top 1,000 livestream sellers, the top 20 sellers have contributed to nearly half of the gross merchandise volume (GMV), using three major Chinese streaming platforms: Taobao, Douyin, and Kuaishou. Moreover, a novice in livestream e-commerce knows less about the important impact factors of the realm. Akin to the adage, “well aware is well prepared,” knowing more about the influencing factors of livestream e-commerce more will be the chances to promote the commercial value. A benchmark research is needed to systematically trace out the most important and influencing factors and to make possible the rising of selling with less effort, hence this study. The research intends to sort out the relevant influencing factors that affect consumers’ shopping motivation in livestream e-commerce by reviewing previous related literature. Then, through the Delphi method, eight experts constructed the 14 main influencing factors that affect consumers’ shopping motivation in livestream e-commerce. Through DEMATEL-ANP, we can not only find the key factors but also sort out the causal relationship between the main key factors, forming a preliminary evaluation model of the commercial value of livestream sellers. The importance-performance analysis (IPA) of these impact factors found that “seller popularity” is the most critical factor affecting consumers’ shopping motivation. At the same time, product discounts, product quality, and the attractiveness of the sellers are being included in effects by the “seller popularity.” The investigation followed in this study revealed that characteristics of the livestream seller are one of the most influencing factor achieving a total weight of 0.3020, whereas the streaming platform is the least influencing factor (total weight is 0.1333). The assessment made the study explore the sustainability of livestream e-commerce in China, and the proposed evaluation model can be used for the preliminary business value evaluation of people engaged in livestream sellers and related industries.
Influence of Environmental Factors on Injury Severity Using Ordered Logit Regression Model in Limpopo Province, South Africa
Authors: Mphekgwana Peter M.
Published: February 2022

Globally, road traffic accidents are a major cause of death and severe injuries. It is estimated that the number of deaths on the world’s roads at 1.5 million per annum puts road traffic injuries as the eighth leading cause of death globally. Understanding the influence of environmental factors on deaths and severe injuries will help in policy‐making and the development of strategies in Limpopo Province. We, therefore, aim to study environmental factors that influence road deaths and severe injuries and to identify whether their impact on injury severity levels varies. The study was based on secondary data on road traffic accidents obtained from the Department of Roads and Transport in Limpopo Province. The data comprised 18 029 road traffic accidents for the period January 2009–December 2015. The study found that weekends (Saturdays and Sundays) had the highest number of accidents when compared to weekdays. The proportion of observations in each severity level was not constant across explanatory variables. The generalized ordered logit regression (GOLR) models seemed to be an effective predicting model that can be adapted to determine the influence of environmental factors on injury severity compared to the ordered logit regression (OLR) model. The results of the GOLR model suggest that environmental factors such as slippery road conditions, rainy weather, and spring season lower the likelihood of severe crash occurrence. On the other hand, poor or defective road surface, time interval (6 a.m. to 11 p.m.), and provincial roads have a higher likelihood of severe crash occurrence. To decrease the severity of injuries in the province, provincial roadways must be maintained regularly.
Collaborative Software Engineering Model Dependent on Deep Recursive Least Squares
Authors: Chen Jiao , Gong Zhi
Published: February 2022

With the continuous development and maturity of information technology, the open methods and development results of software are enriched constantly. There are uncertain factors that may affect the cost of software development. The control of demand, the determination of the logical framework, and the vagueness and inaccuracy of business logic can all affect the development cycle of software. In this paper, the bit error rate and complexity are calculated by using the related algorithm based on the deep recursive least squares algorithm through the establishment of a collaborative engineering tool evaluation system. Under the same preconditions, the estimation performance of the deep recursive least squares algorithm is compared with that of the ideal channel based on the same foundation, and the deep recursive least squares algorithm is simulated through the simulation curve. In addition, the performance of the algorithm is analyzed. The evaluation criteria of four indexes for perception, synchronization, product, and coordination were put forward. The results of the study indicate that the proposed algorithm is effective and can support the engineering modeling of collaborative software.
Double Weak Hopf Quiver and Its Path Coalgebra
Authors: Khan Muhammad Naseer , Ahmed Munir , Arshad Muhammad , Almutiry Waleed , Bantan Rashad A. R. , Elgarhy Mohammed
Published: February 2022

The main input of this research is the introduction of the concept of double weak Hopf quiver (DWHQ). In addition, the structures of weak Hopf algebra (WHA) are obtained through path coalgebra of the proposed quivers. Furthermore, the module and comodule structures on the said WHA are discussed. Moreover, the classification of the semilattice-graded WHA structures of the path coalgebra obtained from the so called DWHQ was presented. This contributes a step further in the development of the module and comodule structures of more general algebras. These structures are important in the physics for dynamic systems.
In Vitro and In Vivo Cardioprotective Effects of Curcumin against Doxorubicin-Induced Cardiotoxicity: A Systematic Review
Authors: Zhang Qian , Wu Lei
Published: February 2022

Objective. This study aimed to review the potential chemoprotective effects of curcumin against the doxorubicin-induced cardiotoxicity. Methods. According to the PRISMA guideline, a comprehensive systematic search was performed in different electronic databases (Web of Science, PubMed, and Scopus) up to July 2021. One hundred and sixty-four studies were screened in accordance with a predefined set of inclusion and exclusion criteria. Eighteen eligible articles were finally included in the current systematic review. Results. According to the in vitro and in vivo findings, it was found that doxorubicin administration leads to decreased cell survival, increased mortality, decreased bodyweight, heart weight, and heart to the bodyweight ratio compared to the control groups. However, curcumin cotreatment demonstrated an opposite pattern in comparison with the doxorubicin-treated groups alone. Other findings showed that doxorubicin significantly induces biochemical changes in the cardiac cells/tissue. Furthermore, the histological changes on the cardiac tissue were observed following doxorubicin treatment. Nevertheless, for most of the cases, these biochemical and histological changes mediated by doxorubicin were reversed near to control groups following curcumin coadministration. Conclusion. It can be mentioned that coadministration of curcumin alleviates the doxorubicin-induced cardiotoxicity. Curcumin exerts these cardioprotective effects through different mechanisms of antioxidant, antiapoptosis, and anti-inflammatory. Since the finding presented in this systematic review are based on in vitro and in vivo studies, suggesting the use of curcumin in cancer patients as a cardioprotector agent against cardiotoxicity mediated by doxorubicin requires further clinical studies.
A Review for Retrieving Wind Fields by Spaceborne Synthetic Aperture Radar
Authors: Zhang Baowei , Guo Jianzhong , Li Ziwei , Cheng Yi , Zhao Yao , Yao Feng , Boota Muhammad Waseem
Published: February 2022

A high-resolution sea surface wind field (SSWF) has high application requirements, such as weather forecast, wind energy evaluation, and oil spill monitoring. The models for retrieving SSWFs based on spaceborne synthetic aperture radar (SAR) are important methods for obtaining high-resolution SSWFs. These models are continuously updated and improved from the prototype to the model to achieve high-resolution and high-precision SSWF retrieval. With the development of SAR technology and the gradual maturation of global ocean observations, SSWF quantitative estimation using SAR has developed from scientific research to operational monitoring. This study summarises the principles and methods of SSWF with multipolarized SAR. Finally, research suggestions and future development directions are put forward.
Comprehensive Evaluation Method of Teaching Effect Based on Particle Swarm Optimization Neural Network Model
Authors: Cao Heng , Gao Qianhui
Published: February 2022

The important role of teaching evaluation system is embodied in: starting from the teaching goal and the vocational education teaching activities. This paper studies the optimization algorithm and optimization system, it not only makes the algorithm involve basic mathematical operations, and the computer support required for the data processing process is not high, but it also improves the evaluation of the degree of optimization. In view of these characteristics, this paper has conducted in‐depth research to fully prove the feasibility and superiority of the content of this article. The specific summary is as follows: (1) Introduced the design concept of particle swarm optimization teaching evaluation system. (2) The use of object‐oriented programming algorithms makes it easier for the algorithm to find an entry point, solve practical problems, and optimize the reusability of the algorithm method. (3) Particle swarm optimization based on quantum behavior, adjusting parameter values, the highest and the lowest, greatly reduces the difficulty of program parameter adjustment. (4) In terms of operation, it can quickly and efficiently complete the maintenance of teacher teaching information, evaluation relationship management of teacher teaching quality evaluation, evaluation content management, student evaluation, supervision evaluation, college leadership evaluation, evaluation performance management, and other operations. The interface is extremely humane. It adopts a web‐style tour method. There are many types of functions, and the system includes common functions required for general teacher teaching information management and quality evaluation, and while providing various functions, it closely integrates the various actual needs of the college. The security performance is good. The system provides user name and password verification, which improves the security of the system. Database management is convenient and fast, providing a database‐friendly management interface, and timely and accurate query. (5) This system adopts an object‐oriented development method. During the development process, full consideration of the user’s needs enabled the system to have powerful functions and streamlined procedures. In the end, this application software basically completed the goals required by the requirements analysis.
A Data Mining‐Based Model for Evaluating Tennis Players’ Training Movements
Authors: Chen Hang
Published: February 2022

This paper uses data mining technology to mathematically model the training movements of tennis players, establish a three‐dimensional data information database of athletes utilizing depth imaging, analyze the data with data mining algorithms, and derive the results after comparative evaluation and analysis with a database of movement characteristics of tennis dribblers. This paper uses video observation and mathematical modeling to construct a tennis player training action evaluation model, which provides a reference basis for tennis players to improve and enhance their tactical level; it can also provide a reference for the development of sports training special theory of tennis projects and enrich the tactical diagnosis method of tennis matches. To improve the accuracy of 3D human pose estimation, this paper adopts a 3D skeleton point extraction method based on RGBD images; for the action alignment problem, this paper uses a dynamic time warping (DTW) algorithm; for the similarity measure, this paper gives a Pearson correlation coefficient method based on the joint point features of human parts. This paper aims to conduct a systematic theoretical analysis of tennis players’ training movements based on theories and methods such as system science theory and social network analysis. On this basis, the characteristics of tennis training technology development are analyzed from a combination of qualitative and quantitative perspectives, while the development of tennis player training is explored based on tracking observations of tennis player movement training, and finally, the attack and service characteristics of tennis training are analyzed to better provide some reference for the sustainable development of tennis.
Value Comparison of Iterative Reconstruction Algorithm-Based Chest CT and Ultrasound in the Diagnosis of Community-Acquired Pneumonia in Children
Authors: Wu Lijuan , Ji Jianwei , Shi Yunlong
Published: February 2022

This study aimed to explore the diagnostic value of chest computed tomography (CT) based on adaptive statistical iterative reconstruction (ASiR) in the optimal weight range for children with community-acquired pneumonia (CAP) and find the differences between chest CT and ultrasound in the diagnosis of CAP. 106 children who were diagnosed as CAP were selected as the research objects. All objects underwent CT and ultrasound scans to measure the noise of CT images after iterative reconstruction and the contrast-to-noise ratio (CNR) of the thoracic aorta and the back muscles. The correlation between ASiR weight, noise, and CNR was analyzed and compared further. In addition, the differences in imaging manifestations of lung consolidation, abnormal pleural line, alveolar interstitial syndrome, and pleural effusion were observed under the ultrasound and CT scans of the patients. The sensitivity, specificity, positive predicted value (PV), and negative PV of the CT scan and ultrasound were analyzed further for the diagnosis of CAP in children. The results showed that ASiR weight and image noise were extremely and negatively correlated (

P
<
0.001

) and that CNR and ASiR weight were extremely and positively correlated (

P
<
0.001

). 40–60% of ASiR image noise was in the middle position, and the muscle space and subcutaneous fat in CT images were clearer when ASiR was at 40% and 60%. 60.38% of children were diagnosed as CAP. The proportions of children with lung consolidation, interstitial changes, pleural effusion, and atelectasis after ultrasound and CT examination were not greatly different (

P
>
0.05

). After ASiR, the sensitivity of CT in detecting the abnormal pleural line + B-line/consolidation feature was the highest, 93.75%. The results of ultrasound diagnosis were consistent with those of chest CT diagnosis (

P
<
0.01

). This indicated that the sensitivity, specificity, positive PV, and negative PV of ASiR-based chest CT in the diagnosis of CAP were close to those of ultrasound.
Phytochemical Characterization and Antioxidant and Enzyme Inhibitory Activities of Different Parts of Prinsepia utilis Royle
Authors: Zheng Yue , Zhao Lei , Yi Junjie
Published: February 2022

The objective of this study was to evaluate the phenolic composition and antioxidant and enzyme inhibitory activities of the flowers, leaves, and stems of Prinsepia utilis Royle. In the work, their total phenol content and flavonoid content were determined. In addition, the scavenging effects of DPPH and ABTS free radicals and ferric reducing antioxidant power were measured. The results showed the flowers had the highest total phenol and flavonoid content, followed by the leaves and stems. A total of 11 phenolic substances were identified and quantified using UHPLC-ESI-HRMS/MS, of which rutin was the dominant phenolic compound in all samples. All three samples had good antioxidant activity and dose dependently inhibited the activity of α-glucosidase, pancreatic lipase, and tyrosinase. In summary, the ethanol extracts of the flowers have the best antioxidant and enzyme inhibitory ability among three samples. The outcome could provide support for the development and utilization of P. utilis.
Color Discrimination Provides Insight into the Relationship between Personality Cognition and Brain Morphology in the Western Mosquitofish (Gambusia affinis)
Authors: Liu Mengyu , Liu Yanqiu , Wang He , Jia Jia , Liu Kai
Published: February 2022

Recent studies on the differences in cognitive ability between individuals focused on two aspects: one is whether the individual differences in cognitive ability are related to brain size, the other is whether they pertain to certain personality traits. To explore these two hypotheses, we tested the personality traits, cognitive abilities, and brain volumes of western mosquitofish (Gambusia affinis). First, a color preference test was conducted to select two unbiased colors for G. affinis for subsequent cognitive tests. The results showed that G. affinis had a great preference for red and green to yellow and blue; therefore, the red-green combination was selected for the study of cognitive abilities. Then, we explored the relationship among cognition, personality, and brain morphology through cognitive abilities tests, personality traits, and brain volume measurements. We found that there was a trade-off among cognition, personality, and brain morphology. For example, more active individuals found food faster, but had also poor memory; Those individuals with larger corpus cerebelli were bolder while they were less likely to find food; The individuals that found food faster were more active and had a smaller inferior lobe. The color preference test provides a reliable way for selecting unbiased colors for behavioral studies in G. affinis. Meanwhile, our study indicates that there exists a balance mechanism among cognition, personality, and brain morphology.
Lipodystrophies in Children
Authors: Mainieri Francesca , Chiarelli Francesco
Published: February 2022

Background: Lipodystrophy includes a wide group of diseases characterized by reduction, absence, or altered distribution of adipose tissue. Lipodystrophies are classified into generalized or partial, according to the fat distribution, and congenital or acquired, considering the etiology. Summary: Impaired glucose and lipid metabolism are typically present, thus severe insulin resistance, diabetes mellitus, dyslipidemia, and hepatic steatosis are frequent complications. Because of the rarity and the diversification of lipodystrophies, diagnosis might be challenging, typically for partial forms that cannot be easily recognized, leading to progression of the several metabolic abnormalities associated. First management of lipodystrophy is diet and lifestyle changes, followed by the treatment of metabolic complications. Replacement therapy with metreleptin, currently available in the USA and Europe, has shown improvement of metabolic profile in a great number of patients with lipodystrophy. Key Messages: The purpose of this review was to describe the phenotypic characteristics of all the known lipodystrophic types and to present specific steps for obtaining an early diagnosis and assessing the best treatment of lipodystrophy.
Irisin Improves High-Fat Diet-Induced Sexual Dysfunction in Obese Male Rats
Authors: Yardimci Ahmet , Ulker Nazife , Bulmus Ozgur , Sahin Elif , Alver Ahmet , Gungor Ibrahim Halil , Turk Gaffari , Artas Gokhan , Kaya Tektemur Nalan , Ozcan Mete , Kelestimur Haluk , Canpolat Sinan
Published: February 2022

Introduction: Obesity is known to cause sexual dysfunction including erectile dysfunction and poor semen quality. Lifestyle modifications such as exercise have increasingly been more recognized to lower the likelihood of having sexual dysfunction or infertility in obese men. In this context, as an exercise-mimetic hormone, irisin has a potential to improve obesity-related reproductive dysfunctions. We aimed to elucidate possible effects of irisin on high-fat diet (HFD)-induced reproductive dysfunction in obese male rats. Methods: Rats were divided into four groups: vehicle, irisin, obese, and obese + irisin. The rats in obese and obese+irisin groups were fed with HFD (60% kcal fat) pellets for 12 weeks to induce obesity, and then obesity-induced sexual dysfunction was confirmed by the sexual behavior test (SBT). Irisin and obese+irisin groups received irisin (100 ng/kg/day) infusion by an s.c. osmotic minipump for 4 weeks after HFD-induced obesity was formed. Results: Irisin did improve a number of measures of copulation, including penile erection, ejaculation, and sexual performance, and also improved sperm morphology and motility and decreased fat-induced testicular damage. It decreased serum leptin levels. On the other hand, irisin did not affect serum luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone. It also increased gene expression of tyrosine hydroxylase (TH) and adrenoceptor alpha 1A (ADRA1A) in the medial preoptic area (mPOA) and nucleus accumbens (NAc). Conclusion: Irisin provided a marked enhancement of HFD-induced decrease in libido, potency, sexual performance, and erection in SBT. Taken together, our results emphasize that irisin has a restorative and improver role in HFD-induced reproductive dysfunctions in obese male rats.
Person following control for a mobile robot based on color invariance corresponding to varying illumination
Authors: Oh-hara Shinsuke , Saito Kaoru , Fujimori Atsushi
Published: February 2022

In this paper, we present a method of  person following control for a mobile  robot  using  visual  information.  Color  information  is  often  used  for  object  tracking.  Color  information  of  objects  varies  greatly  under illumination  changing  environment.  In  such  conditions ,  the  robot  controlled  by  visu al  information  may lose  sight of  a person.  In this paper,  we  consider  a  robust  person following method by color invariance and image - based control. Color  invariance show s robust  features  of  colored  objects  in  terms  of  changing  illumination conditions . At f irst, we estimate  the  lowest positions of both feet  of a tracked person through particle filters based on color invariances . Then,  we control the velocity of the robot to track the person by using the image - based controller. Experimental results using a n a ctual  robot demonstrate the  effectiveness of the proposed method.
Active object search using a pyramid approach to determine the next-best-view
Authors: Flores-Rodriguez Karen-Lizbeth , Trujillo-Romero Felipe , Gonzalez-Barbosa Jose-Joel
Published: February 2022

The development of service robotics continues to arouse interest in the scientific community due to the complexity of the activities performed like interaction in human environments, identifying and manipulating objects, and even learning by themselves. This paper proposed to improve the perception of the environment by searching for objects in service robotics tasks. We present the development and implementation of an active object search method based on three main phases: Firstly, image pyramid segmentation to examine in detail the im- age features. Second step, object detection at each level of the pyramid through a local feature descriptor and a mutual information calculation. Finally, the next camera position selection through analyzing the object detections accumulation in the pyramid. To evaluate the implementation of the proposed method, we use a NAO robot in a familiar place for humans, such as an office or a home. Ordinary objects are part of our database with the premise that a robot must know them before looking for an object. The results in the experiments showed an acceptable performance in simulation and with a real platform.
A produção jornalística em favor da comunidade: Aspectos do programa Caravana do Esporte
Authors: Falcão Tiago Brant de Carvalho
Published: February 2022

Este artigo tem como objetivo identificar e analisar as razões que levam à produção de um programa jornalístico como ferramenta de comunicação para um movimento de ação e mobilização social pelo esporte educacional, disseminando os princípios do olimpismo e da educação integral. O objeto de estudo é o programa "Caravana do Esporte”, veiculado mensalmente pelo canal ESPN Brasil, num universo dominado pelo esporte de alto rendimento, pelo entretenimento e pelo crescente culto às celebridades do esporte.PALAVRAS-CHAVE: Esporte e Educação. Jornalismo Esportivo. Olimpismo. Televisão.
Hemodynamic during resistance exercise sets and rest intervals in young and older men
Authors: Sardeli Amanda Veiga , Gáspari Arthur Fernandes , Santos Lucas do Camargo , Ferreira Marina Lívia Venturini , Rosenberg Alexander J. , Baynard Tracey , Fernhall Bo , Cavaglieri Cláudia Regina , Chacon-Mikahil Mara Patrícia Traina
Published: February 2022

Intense blood pressure elevations during resistance exercise (RE) could lead to risk of acute cardiovascular events. Since, the natural aging process contribute to rest and exercise elevations in BP it could be expected higher BP elevations following RE in older individuals. However, the studies have shown contradictory findings which are likely due to the time of BP assessment following exercise. Thus, we compared BP changes after each set and rest interval in young and older men. Sixteen men (8 each group) underwent four sets until fatigue at leg press equipment with high load (80% 1RM). BP was assessed, by finger photoplethysmography and the other cardiovascular measurements were estimated based on body characteristics. Systolic BP (SBP) and mean BP (MBP) increased more in older men at first sets; heart rate (HR) increased more in young during all sets and rest intervals; cardiac output (CO) maintained higher all the time in young; and total peripheral resistance (TPR) increased more during all sets in older men. Thus, the present study shows that RE performed to fatigue leads to higher BP increase in older men suggesting BP might be monitored during RE for safe proposal especially on this higher risk population.
Acute effect of energy drink ingestion on Crossfit performance: a randomized, double-blind, crossover study
Authors: Silva Vladimir Schuindt da , Souza Israel , Piekler Diogo Rafael
Published: February 2022

The aim of this study was to analyze the acute effects of energy drink (ED) ingestion on CrossFit®performance in a randomized, double-blind, cross-over study, with 8 CrossFit®-trained (26.5 ± 2.7 years;70.2 ± 13.0 kg; 1.7 ± 0.09 m; 23.0 ± 3.2 kg/m2; Σ skinfold thickness: 34.1 ± 6.9 mm; body fat: 13.3 ± 3.0%), that were randomly allocated to 2 groups and underwent 2 trials separated by a 7-day washoutperiod. Participants ingested either a dose of 300 mL of ED or Placebo (soda), 30 minutes before thestart of tests of muscular strength (MS), 10 and 12 maximum repetitions (MRs) in barbell bench press(BBP) and barbell squat (BS), respectively and localized muscular endurance (LME) using Workout of the Day (WOD) selected. The rating of perceived exertion (RPE) and the rating of perceived pain (RPP)were evaluated immediately after the tests. The total volume of repetitions (TVR) was evaluated to each test. The TVR was significantly higher after consuming the ED (p = 0.012) and of the Placebo(p = 0.027). There was a reduction in the rate of RPE after the consumption of both drinks (p = 0.023and p = 0.024). The consumption of ED significantly reduced the rate of RPP (p = 0.017). Acute EDingestion improved CrossFit® performance by increased the TVR and the pain tolerance.
Prevalence of Burnout Syndrome in Physical Education Teachers
Authors: Souza Bruno Macedo , Leite Daniel Massote de Melo
Published: February 2022

The objective was to verify the prevalence of Burnout Syndrome (BS) in Physical Education teachers from state schools in the metropolitan region of Belo Horizonte/MG. This is a cross-sectional study with a quantitative approach, its sample consisted of 47 teachers, being active in schools in the urban area, having at least 1 year of teaching in their current school. For data collection we used two instruments: a sociodemographic and labor questionnaire and the "Spanish Burnout Inventory", educational version (SBI-Ed). After analyzing the studies, it is clear that this was the first time that SBI was used in this professional class in Brazil. The results showed that the Physical Education teachers of the sample had Burnout, being 12.77% with the BS Profile 1 and 6.38% having the Profile 2. As initial results obtained from this sample demonstrates the need for longitudinal and epidemiological studies on this thematic, with a larger number of participants, to understand the possible consequences of people who have BS over the years; seen as a syndrome with several stages and processes for its prevalence.
Atividades características da cadeia do turismo: uma revisão sistemática da literatura
Authors: Rios Mayara Vieira , Levino Natallya de Almeida , Finger Andrew Beheregarai
Published: February 2022

O turismo vem se consolidando como um dos setores mais importantes da economia mundial devido ao seu grande potencial econômico e de geração de empregos. Diante disso, torna-se fundamental analisar as atividades que fazem parte da cadeia do turismo, dado o impacto delas no desenvolvimento de uma região. Este trabalho tem o objetivo de identificar as atividades da cadeia do turismo citadas pelos artigos relacionados ao tema nos últimos anos. Com caráter exploratório, a metodologia utilizada foi a revisão sistemática da literatura, realizada nas bases de dados da Plataforma de Periódicos Capes e Spell, selecionando os trabalhos no período entre 01 de setembro de 2015 e 01 de setembro de 2020. A pesquisa realizada originou 72 artigos que, após os critérios de inclusão e exclusão, resultou em 33 artigos válidos. Observou-se que a maioria dos textos citam os meios de hospedagem como atividade que compõe a cadeia do turismo, seguida, em ordem de importância, dos serviços de alimentos e bebidas; agências de viagens e operadoras de turismo; transporte; e atrativos turísticos. Muitos artigos não mencionam nenhuma atividade, deixando uma lacuna nos estudos desta temática. Conclui-se que não há um consenso entre os autores sobre a composição da cadeia do turismo.
O uso da semiótica para pesquisas em turismo
Authors: Guissoni Rodrigo
Published: February 2022

Resenha do livro Mello, C. (2019). Semiótica do turismo aplicada. Curitiba, PR: Appris.
Podcast no Brasil: disrupção de modelos de comunicação ou submissão à lógica de grupos hegemônicos de poder?
Authors: Cardoso Marcelo , Villaça Lenise
Published: February 2022

O artigo discute como o podcast no Brasil ganha contornos próprios a partir da segunda década dos anos 2000 e se transforma em meio para consumo em massa. De produto midiático alternativo e com produção de baixo custo, o podcast passa a integrar a estratégia de importantes players no mercado da comunicação. Por meio de pesquisas de mercado e de estudos acadêmicos como de Bonini (2015), Morozov (2018), Moreira (1998) e Ortriwano (1985) demonstra-se que parte dos podcasts produzidos se submete à lógica dos grupos hegemônicos da radiodifusão ou de produtoras de áudio e websites já consolidados. Questiona-se: estariam os podcasts mais ouvidos ganhando características típicas dos grupos dominantes e provocando a homogeneização de temáticas, de formatos e da ideologia? Considera-se a possibilidade de surgirem diferentes e criativos modelos de produção e de distribuição de podcasts.
Lugar da chuva: corpos viajantes em urbanidades amazônicas
Authors: Dias Wellington Douglas dos Santos , Dos Santos José Raphael Brito
Published: February 2022

O artigo visa apresentar as experiências de corpo em diálogo com espaços e urbanidades amazônicas do processo de criação do espetáculo Lugar da Chuva, dos grupos Frêmito Teatro (AP) e Agrupamento Cynétiko (SP), que ocorreu nas cidades de Macapá e Santana, no estado do Amapá. O panorama teórico desta pesquisa conversou com as seguintes questões e seus respectivos autores: “estados de presença” com Eleonora Fabião (2010), “a rua e cidade enquanto trama” com André Carreira (2009) e a “dimensão ancestral da floresta e seus povos” com Davi Kopenawa (2015), dentre outros. Esta reflexão também objetiva ampliar as perspectivas sobre a sensibilização do corpo do ator, a busca por investigações nas urbanidades amazônicas e também transitar entre noções de corpo e espaço. Neste sentido, apresentaremos parte da trajetória desta experiência, articulando reflexões sensíveis e poéticas sobre o processo.
Data final do Mecanismo de Anticítera
Authors: Bandeira Beatriz
Published: February 2022

Este artigo apresenta as investigações de Carman (2017), que demonstram  a data de 5 de março de 193 A.E.C., ou um mês anomalístico antes como sendo a última vez que a manivela do Mecanismo de Anticítera foi acionada, algum tempo antes do naufrágio. Para argumentar sua proposta este pesquisador considerou duas datas - ambas correspondentes ao ano de 205 A.E.C.,  - já obtidas a partir dos dados analisados nos mostradores posteriores do aparato; Metônico (parte superior) e Saros (parte inferior), alguns ponteiros identificados por tomografias computadorizadas, e restos de alguns dos fragmentos para fundamentar sua investigação.
Colapso ambiental, povos autóctones e agricultura industrializada
Authors: Trivellato Gabriela Maria Leme , Leme Luciana Maria de Lima
Published: February 2022

Atualmente, as sociedades ao redor do mundo têm enfrentado as externalidade negativas da agricultura industrializada. Deparamo-nos com um colapso ambiental e social que tem afetado a todos os grupos humanos. Mesmo que os níveis do impacto sejam diferentes para cada contexto social, somos todos povos autóctones, no sentido da vulnerabilidade diante da escassez hídrica, do aumento da temperatura, da Pandemia de Covid-19. Pautados pela Antropologia, buscamos nesse texto discutir em que medida a agricultura industrializada, que se tornou hegemônica no ocidente, é apenas uma forma de se fazer e entender a agricultura. Trata-se de acreditar que a defesa deste ou daquele modo de fazer agricultura tem como base a cultura de cada sociedade. Nesse sentido, a Antropologia ajuda-nos a compreender que outras formas de cultivar e habitar o planeta são possíveis e viáveis.
Tentativa de uma teoria da fricção dos fluidos
Authors: Bistafa Sylvio Reynaldo
Published: February 2022

Em 1761, Leonhard Euler (1707-1783) publicou um tratado escrito em Latim com o título “Tentativa de uma teoria da fricção dos fluidos,” no qual ele assumiu que, similar ao atrito sólido, a fricção nos fluidos é proporcional à pressão. Diversos experimentos foram propostos por Euler para derivação de um fator de fricção, com o objetivo de confirmar experimentalmente suas equações. Em seu tratado, foram apresentadas descrições detalhadas de cinco diferentes problemas de descarga, levando em conta a perda de carga em condutos. No apêndice, é dado um exemplo de cálculo da altura do jato de uma determinada fonte, alimentada com condutos de diferentes áreas de seções transversais (A aplicação do corrente método de cálculo da perda de carga em condutos revela que Euler superestimou consideravelmente a altura do jato da fonte).
Jorge Wagensberg
Authors: Magalhães Gildo
Published: February 2022

In memoriam  Jorge Wagensberg
Delayed Finalization of Sodium Targets in the United States May Cost Over 250 000 Lives by 2031
Authors: Song Jing , Brown Mhairi K. , Cobb Laura K. , Jacobson Michael F. , Ide Nicole , MacGregor Graham A. , He Feng J.
Published: February 2022

Background:

The US Food and Drug Administration (FDA) proposed 2- and 10-year voluntary sodium-reduction targets for >150 packaged- and prepared-food categories in 2016 and finalized the short-term targets in 2021.

Methods:

We modeled the health benefits of implementing the newly finalized sodium targets, and the net health losses because of the 4.3-year delay in finalizing the sodium targets in different compliance scenarios in adults aged ≥30, using the National Health and Nutrition Examination Survey (NHANES) 2015 to 2016 cycle. The health impact was estimated by multiplying the projected reduction in population sodium intake by the annual health benefits resulting from every 1000-mg reduction in daily sodium intake.

Results:

Under certain assumptions, the FDA’s finalization of the short-term targets in Oct 2021 and possible finalization of the long-term targets by April 2024 is projected to save up to 445 979 (95% CI, 17 349–787 352) lives in the coming 10 years. The net number of unnecessary deaths because of FDA’s delay is projected to be as high as 264 644 (95% CI, 10 295–467 215) according to our prediction.

Conclusions:

These findings highlight the enormous health costs due to the FDA’s delay in finalizing the sodium-reduction targets, and the great potential health benefits of industry compliance with the FDA’s finalization of its short- and long-term targets in the coming 10 years.
Intersecting the Academic Gender Gap: The Education of Lesbian, Gay, and Bisexual America
Authors: Mittleman Joel
Published: February 2022

Although gender is central to contemporary accounts of educational stratification, sexuality has been largely invisible as a population-level axis of academic inequality. Taking advantage of major recent data expansions, the current study establishes sexuality as a core dimension of educational stratification in the United States. First, I analyze lesbian, gay, and bisexual (LGB) adults’ college completion rates: overall, by race/ethnicity, and by birth cohort. Then, using new data from the High School Longitudinal Survey of 2009, I analyze LGB students’ performance on a full range of achievement and attainment measures. Across analyses, I reveal two demographic facts. First, women’s rising academic advantages are largely confined to straight women: although lesbian women historically outpaced straight women, in contemporary cohorts, lesbian and bisexual women face significant academic disadvantages. Second, boys’ well-documented underperformance obscures one group with remarkably high levels of school success: gay boys. Given these facts, I propose that marginalization from hegemonic gender norms has important—but asymmetric—impacts on men’s and women’s academic success. To illustrate this point, I apply what I call a “gender predictive” approach, using supervised machine learning methods to uncover patterns of inequality otherwise obscured by the binary sex/gender measures typically available in population research.