bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Chamber Geometrical Parameters on Suppressing Explosion Propagation
Authors: Yan Zhuo , Guo Shengli , Yuan Shujie , Mu Chaomin
Published: August 2021

In this article, the effect of a chamber’s geometrical parameters on suppressing gas explosion propagation was studied. Three rectangular chambers were used in the study, with a constant length of 0.5 m, a constant height of 0.2 m, and a variable width of 0.3 m, 0.5 m, and 0.8 m; each chamber was installed in a pipeline system for experimental research. The experimental results showed that when the chamber length and height were fixed at 0.5 m and 0.2 m, respectively, the suppression effect of the chamber on the explosion shockwave improves with the increase in the chamber width; when the chamber width increases to 0.8 m, the chamber has suppressive effect on explosion shockwave propagation. It was also found that the suppression effect of the chambers on the explosion flame improves with the increase in the chamber width; when the width of the chamber is 0.5 m, the chamber effectively suppresses explosion flames. Based on the experimental results, a numerical model was established to simulate the suppression effect of five types of chambers with a length, width, and height of 0.5 m × 0.3 m × 0.2 m, 0.3 m × 0.5 m × 0.2 m, 0.5 m × 0.5 m × 0.2 m, 0.5 m × 0.8 m × 0.2 m, and 0.8 m × 0.5 m × 0.2 m, respectively. The numerical simulation results indicated that when the chamber length and height are constant at 0.5 m and 0.2 m, respectively, the suppressive effect of the chamber on the shockwave improves as the chamber width increases; when the chamber width increases to 0.8 m, the shockwave overpressure at the chamber outlet is attenuated by 10.61%, indicating that the chamber suppresses the propagation of explosion shockwave, which is consistent with the experimental results obtained in the study. It was also found that when the chamber width and height were constant at 0.5 m and 0.2 m, respectively, as the chamber length increases, the overpressure increases first and then weakens. When the chamber length increases to 0.8 m, the overpressure at the chamber outlet is attenuated by −14.16%, indicating that the chamber is not able to suppress the propagation of explosion shockwave. Finally, a numerical simulation of the propagation process of a methane‐air mixture and explosion flames in different chambers was performed to analyse the effect of chamber geometrical parameters on explosion suppression effect.
Modeling of Wireless Traffic Load in Next Generation Wireless Networks
Authors: Manzoor Sohaib , Bajwa Khalid Bashir , Sajid Muhammad , Manzoor Hira , Manzoor Mahak , Ali Nouman , Menhas Muhammad Ilyas
Published: August 2021

Software defined WiFi network (SD-WiFi) is a new paradigm that addresses issues such as mobility management, load management, route policies, link discovery, and access selection in traditional WiFi networks. Due to the rapid growth of wireless devices, uneven load distribution among the network resources still remains a challenging issue in SD-WiFi. In this paper, we design a novel four-tier software defined WiFi edge architecture (FT-SDWE) to manage load imbalance through an improved handover mechanism, enhanced authentication technique, and upgraded migration approach. In the first tier, the handover mechanism is improved by using a simple AND operator and by shifting the association control to WAPs. Unauthorized user load is mitigated in the second tier, with the help of base stations (BSs) which act as edge nodes (ENs), using elliptic ElGamal digital signature algorithm (EEDSA). In the third tier, the load is balanced in the data plane among the OpenFlow enabled switches by using the whale optimization algorithm (WOA). Moreover, the load in the fourth tier is balanced among the multiple controllers. The global controller (GC) predicts the load states of local controllers (LCs) from the Markov chain model (MCM) and allocates packets to LCs for processing through a binary search tree (BST). The performance evaluation of FT-SDWE is demonstrated using extensive OMNeT++ simulations. The proposed framework shows effectiveness in terms of bandwidth, jitter, response time, throughput, and migration time in comparison to SD-WiFi, EASM, GAME-SM, and load information strategy schemes.
A Behavior-Driven Forum Spammer Recognition Method with Its Application in Automobile Forums
Authors: Su Han , Ren Minglun , Wang Anning , Tang Xiaoan , Ni Xin , Fang Zhao
Published: August 2021

Forum comments are valuable information for enterprises to discover public preferences and market trends. However, extensive marketing and malicious attack behaviors in forums are always an obstacle for enterprises to make effective use of this information. And these forum spammers are constantly updating technology to prevent detection. Therefore, how to accurately recognize forum spammers has become an important issue. Aiming to accurately recognize forum spammers, this paper changes the research target from understanding abnormal reviews and the suspicious relationship among forum spammers to discover how they must behave (follow or be followed) to achieve their monetary goals. First, we classify forum spammers into automated forum spammers and marketing forum spammers based on different behavioral features. Then, we propose a support vector machine-based automated spammer recognition (ASR) model and a k-means clustering-based marketing spammer recognition (MSR) model. The experimental results on the real-world labelled dataset illustrate the effectiveness of our methods on classification spammer from common users. To the best of our knowledge, this work is among the first to construct behavior-driven recognition models according to the different behavioral patterns of forum spammers.
Human Motion Recognition Based on Multimodal Characteristics of Learning Quality in Football Scene
Authors: Gao Yuzhou , Ma Guoquan
Published: August 2021

The task of human motion recognition based on video is widely concerned, and its research results have been widely used in intelligent human-computer interaction, virtual reality, intelligent monitoring, security, multimedia content analysis, etc. The purpose of this study is to explore the human action recognition in the football scene combined with learning quality related multimodal features. The method used in this study is to select BN-Inception as the underlying feature extraction network and use uncontrolled environment and real world to capture datasets UCFl01 and HMDB51, and pretraining is carried out on the ImageNet dataset. The spatial depth convolution network takes image frame as input, and the temporal depth convolution network takes stacked optical flow as input to carry out human action multimodal identification. In the results of multimodal feature fusion, the accuracy of UCFl01 dataset is generally high, all of which are over 80%, and the highest is 95.2%, while the accuracy of HMDB51 dataset is about 70%, and the lowest is only 56.3%. It can be concluded that the method of this study has higher accuracy and better effect in multimodal feature acquisition, and the accuracy of single-mode feature recognition is significantly lower than that of multimodal feature recognition. It provides an effective method for the multimodal feature of human motion recognition in the scene of football or sports.
The Influences of Bladder Properties on the Working Performance of the Multibladder‐Type Inflatable Anchor
Authors: Peng Wen Xiang , Xu Ming Kai , Chen Yi Fan , Yuan Bo , Yang Zhuo , Lin Hang
Published: August 2021

Due to the high bearing capacity and better controllability of bladder parameters, the multibladder‐type inflatable anchor shows a great application prospect in the engineering construction in soft soil areas. In this study, based on a soft soil foundation pit project in Guangzhou Province, China, the multibladder‐type inflatable anchor was applied to the engineering practice for the first time, and the working characteristics of the multibladder‐type inflatable anchor were analyzed and discussed through field experiments. Primarily, the optimization design and experimental facility of the multibladder‐type inflatable anchor were introduced in detail to realize the refinement and perfection of the anchorage technological process. Besides, the influence degrees of the bladder number, diameter, thickness, space, and length on the bearing characteristics and deformation control of the anchor were studied by using the control variable method, as well as the influencing mechanisms. Subsequently, the advantages of the multibladder‐type inflatable anchor were presented by comparing its anchoring efficacy with that of the traditional grouting anchor. Ultimately, the analysis results were used to verify the reliability of the multibladder‐type inflatable anchor and provide the experimental basis for its popularization and application.
A Dynamic‐Balancing Testing System Designed for Flexible Rotor
Authors: Zhao Shibo , Ren Xingmin , Liu Yihao , Lu Kuan , Fu Chao , Yang Yongfeng
Published: August 2021

In this paper, a dynamic‐balancing testing system is designed. The innovative feature of the testing system is the dynamic balancing of the rotor system with robustness and high balance efficiency which meets the requirements of engineering application. The transient characteristic‐based balancing method (TCBM) interface and the influence coefficient method (ICM) interface are designed in the testing system. The TCBM calculates the unbalance by the transient vibration responses while accelerating rotor operating without trail‐weight. The ICM calculates the unbalance by the steady‐state vibration responses while the rotor system operates with trail‐weight and constant speed. The testing system has the functions of monitoring operations synchronously, measuring and recording the required vibration responses, analyzing the dynamic characteristics, and identifying the unbalance parameters. Experiments of the single disc rotor system are carried out, and the maximum deflection of the measuring point has decreased by 73.11% after balancing by the TCBM interface. The maximum amplitude of the measuring point at 2914 r/min has decreased by 77.74% after balancing by ICM interface, while the maximum deflection during the whole operation has decreased by 70.00%. The experiments prove the effectiveness of the testing system, while the testing system has advantages of convenient and intuitive operation, high balance efficiency, and security.
MKRN1 Ubiquitylates p21 to Protect against Intermittent Hypoxia‐Induced Myocardial Apoptosis
Authors: Bai Xue , Yang Hui , Pu Jiayuan , Zhao Yan , Jin Ying , Yu Qin
Published: August 2021

Although chronic intermittent hypoxia‐ (IH‐) induced myocardial apoptosis is an established pathophysiological process resulting in a poor prognosis for patients with obstructive sleep apnea syndrome, its underlying mechanism remains unclear. This study is aimed at exploring the role of makorin ring finger protein 1 (MKRN1) in IH‐induced myocardial apoptosis and elucidating its molecular activity. First, the GSE2271 dataset was downloaded from the Gene Expression Omnibus database to identify the differentially expressed genes. Then, an SD rat model of IH, together with rat cardiomyocyte H9C2 and human cardiomyocyte AC16 IH models, was constructed. TUNEL, Western blot, and immunohistochemistry assays were used to detect cell apoptosis. Dihydroethidium staining was conducted to analyze the concentration of reactive oxygen species. In addition, RT‐qPCR, Western blot, and immunohistochemistry were performed to measure the expression levels of MKRN1 and p21. The direct interaction between MKRN1 and p21 was determined using coimmunoprecipitation and ubiquitination analysis. MKRN1 expression was found to be downregulated in IH rat myocardial tissues as well as in H9C2 and AC16 cells. Upregulated expression of MKRN1 in H9C2 and AC16 cells alleviated the IH‐induced reactive oxygen species production and cell apoptosis. Mechanistically, MKRN1 promoted p21 protein ubiquitination and the proteasome pathway degradation to negatively regulate p21 expression. Thus, MKRN1 regulates p21 ubiquitination to prevent IH‐induced myocardial apoptosis.
A Comparative Study of Natural Convection Flow of Fractional Maxwell Fluid with Uniform Heat Flux and Radiation
Authors: Tang Ruihua , Rehman Sadique , Farooq Aamir , Kamran Muhammad , Qureshi Muhammad Imran , Fahad Asfand , Liu Jia-Bao
Published: August 2021

This paper focuses on the comparative study of natural convection flow of fractional Maxwell fluid having uniform heat flux and radiation. The well‐known Maxwell fluid equation with an integer‐order derivative has been extended to a non‐integer‐order derivative, i.e., fractional derivative. The explicit expression for the temperature and velocity is acquired by utilizing the Laplace transform (LT) technique. The two fractional derivative concepts are used (Caputo and Caputo–Fabrizio derivatives) in the formulation of the problem. Utilizing the Mathcad programming, the effect of certain embedded factors and fractional parameters on temperature and velocity profile is graphically presented.
Influence of Spatiotemporal Difference and Input of Higher Education on Regional Economy
Authors: Feng Li
Published: August 2021

Scientific expenditure and distribution of higher education drive the sustainable and stable development of regional economy. Currently, China faces an imbalance in the allocation of higher education resources. To solve the problem, it is necessary to study the spatiotemporal difference of higher education development. Therefore, this paper explores how higher education varies in time and space and measures how the spatiotemporal difference and input of higher education affects regional economy. Firstly, the authors divided the influence of spatiotemporal difference and input of higher education on regional economy into four aspects. Next, the spatiotemporal differences of higher education were examined in detail. Based on the four aspects, an equilibrium model was established for regional economic development, and the law of evolution to equilibrium was analyzed. Experimental results verify the effectiveness of the established model.
Polygenic Risk Score Improves Risk Stratification and Prediction of Subsequent Thyroid Cancer after Childhood Cancer
Authors: Song Nan , Liu Qi , Wilson Carmen L. , Sapkota Yadav , Ehrhardt Matthew J. , Gibson Todd M. , Morton Lindsay M. , Chanock Stephen J. , Neglia Joseph P. , Arnold Michael A. , Michael J. Robert , Gout Alexander M. , Mulder Heather L. , Easton John , Bhatia Smita , Armstrong Gregory T. , Zhang Jinghui , Delaney Angela , Hudson Melissa M. , Robison Leslie L. , Yasui Yutaka , Wang Zhaoming
Published: August 2021

Background:

Subsequent thyroid cancer (STC) is one of the most common malignancies in childhood cancer survivors. We aimed to evaluate the polygenic contributions to STC risk and potential utility in improving risk prediction.

Methods:

A polygenic risk score (PRS) was calculated from 12 independent SNPs associated with thyroid cancer risk in the general population. Associations between PRS and STC risk were evaluated among survivors from St. Jude Lifetime Cohort (SJLIFE) and were replicated in survivors from Childhood Cancer Survivor Study (CCSS). A risk prediction model integrating the PRS and clinical factors, initially developed in SJLIFE, and its performance were validated in CCSS.

Results:

Among 2,370 SJLIFE survivors with a median follow-up of 28.8 [interquartile range (IQR) = 21.9–36.1] years, 65 (2.7%) developed STC. Among them, the standardized PRS was associated with an increased rate of STC [relative rate (RR) = 1.57; 95% confidence interval (CI) = 1.24–1.98; P < 0.001]. Similar associations were replicated in 6,416 CCSS survivors, among whom 121 (1.9%) developed STC during median follow-up of 28.9 (IQR = 22.6–34.6) years (RR = 1.52; 95% CI = 1.25–1.83; P < 0.001). A risk prediction model integrating the PRS with clinical factors showed better performance than the model considering only clinical factors in SJLIFE (P = 0.004, AUC = 83.2% vs. 82.1%, at age 40), which was further validated in CCSS (P = 0.010, AUC = 72.9% vs. 70.6%).

Conclusions:

Integration of the PRS with clinical factors provided a statistically significant improvement in risk prediction of STC, although the magnitude of improvement was modest.

Impact:

PRS improves risk stratification and prediction of STC, suggesting its potential utility for optimizing screening strategies in survivorship care.
Functional Characterization of Brain Tumor-Initiating Cells and Establishment of GBM Preclinical Models that Incorporate Heterogeneity, Therapy, and Sex Differences
Authors: Garcia Cesar A. , Bhargav Adip G. , Brooks Mieu , Suárez-Meade Paola , Mondal Sujan K. , Zarco Natanael , ReFaey Karim , Jentoft Mark , Middlebrooks Erik H. , Snuderl Matija , Carrano Anna , Guerrero-Cazares Hugo , Schiapparelli Paula , Sarabia-Estrada Rachel , Quiñones-Hinojosa Alfredo
Published: August 2021

Glioblastoma (GBM) is the most common primary brain cancer in adults where tumor cell heterogeneity and sex differences influence clinical outcomes. Here, we functionally characterize three male and three female patient-derived GBM cell lines, identify protumorigenic BTICs, and create novel male and female preclinical models of GBM. Cell lines were evaluated on the following features: proliferation, stemness, migration, tumorigenesis, clinical characteristics, and sensitivity to radiation, TMZ, rhTNFSF10 (rhTRAIL), and rhBMP4. All cell lines were classified as GBM according to epigenetic subtyping, were heterogenous and functionally distinct from one another, and re-capitulated features of the original patient tumor. In establishing male and female preclinical models, it was found that two male-derived GBM cell lines (QNS108 and QNS120) and one female-derived GBM cell line (QNS315) grew at a faster rate in female mice brains. One male-derived GBM cell line (QNS108) decreased survival in female mice in comparison with male mice. However, no survival differences were observed for mice injected with a female-derived cell line (QNS315). In summary, a panel of six GBM patient-derived cell lines were functionally characterized, and it was shown that BTIC lines can be used to construct sex-specific models with differential phenotypes for additional studies.
Further Expansion of the Mutational Spectrum of 3MC Syndrome: A Novel MASP1 Pathogenic Variant in a Male Patient
Authors: Agaoglu Nihat Bugra , Akgun Dogan Ozlem
Published: August 2021

The 3MC syndrome is a rare autosomal recessive syndrome characterized by facial dysmorphism, multiple congenital abnormalities, and postnatal growth deficiency. Hypertelorism, blepharophimosis, blepharoptosis, high-arched eyebrows, and cleft lip/palate compose the facial gestalt, which is the key component for diagnosing the syndrome. Biallelic pathogenic variants in MASP1, COLEC11, and COLEC10 are responsible for 3MC syndrome in which both genotypic and phenotypic heterogeneity is described. To date, 16 homozygous/compound heterozygous pathogenic variations in 27 patients from 22 families have been reported in the MASP1 gene associated with 3MC syndrome. Here, we report a male patient with a novel homozygous pathogenic variant in MASP1 in whom macrocephaly, pyloric stenosis, and prenatal findings including polyhydramnios, aortic dilatation, and intracranial cysts beside the distinctive facial features were detected. Reporting detailed clinical and molecular findings in patients is pivotal in terms of enabling the phenotypic and genotypic spectrum of this rare syndrome to be delineated.
The Significance of INHBE Expression in the Cancer Cells of Clear-Cell Renal Cell Carcinoma
Authors: Xu Zi-Bin , Gan Mei-Fu , Yu Hong-Yuan , Mo Li-Cai , Xia Yu-Hui , Yu Qing-Xin , Zheng Jing-Min
Published: August 2021

Background: Activins and inhibins are structurally related dimeric glycoprotein hormones belonging to the transforming growth factor-β superfamily but whether they are also involved in malignancy is far from clear. No study has reported the expression of INHBE in kidney cancer. The purpose of this study was to examine the expressions of INHBE in the tumor tissue of patients with clear-cell renal cell carcinoma (ccRCC) and to explore the pathologic significance. Methods: The INHBE mRNA expression in the tumor tissue of ccRCC patients was analyzed by using RNA sequencing data from the TCGA database. To examine the expression of inhibin βE protein, 241 ccRCC patients were recruited and immunohistochemistry was performed on the tumor tissue of these patients along with 39 normal renal samples. The association between the inhibin βE expression level and patient’s clinicopathological indices was evaluated. Results: In the normal renal tissue, inhibin βE was found to be expressed mainly by renal tubular epithelial cells. In the tumor tissue, inhibin βE was expressed mainly in cancer cells. The expressions of INHBE mRNA and protein in the tumor tissue of ccRCC patients increased significantly compared with those in normal renal samples. There was a significant correlation between the level of inhibin βE in the tumor tissue and tumor grade. Patients with a lower inhibin βE expression in the tumor tissue were found to have a longer overall survival and disease-specific survival. Conclusions: INHBE might be involved in the pathogenesis of ccRCC and function as a tumor promoter.
Discrepancy between German S3 Guideline Recommendations and Daily Urologic Practice in the Management of Nonmuscle Invasive Bladder Cancer: Results of a Binational Survey
Authors: Struck Julian P. , Hennig Martin J.P. , Hupe Marie C. , Moharam Nadim , Paffenholz Pia , Nestler Tim , Frank Tanja , Worst Thomas S. , Grabbert Markus , Pohlmann Philippe-Fabian , Dogan Serkan , Hofbauer Sebastian L. , Kalogirou Charis , Mattigk Angelika , Brandt Maximilian P. , Krabbe Laura-Maria , Reis Henning , Dressler Franz F. , Kramer Mario W. , Salem Johannes
Published: August 2021

Introduction: Guideline recommendations are meant to help minimize morbidity and to improve the care of nonmuscle invasive bladder cancer (NMIBC) patients but studies have suggested an underuse of guideline-recommended care. The aim of this study was to evaluate the level of adherence of German and Austrian urologists to German guideline recommendations. Methods: A survey of 27 items evaluating diagnostic and therapeutic recommendations (15 cases of strong consensus and 6 cases of consensus) for NMIBC was administered among 14 urologic training courses. Survey construction and realization followed the checklist for reporting results of internet e-surveys and was approved by an internal review board. Results: Between January 2018 and June 2019, a total of 307 urologists responded to the questionnaire, with a mean response rate of 71%. The data showed a weak role of urine cytology (54%) for initial diagnostics although it is strongly recommended by the guideline. The most frequently used supporting diagnostic tool during transurethral resection of the bladder was hexaminolevulinate (95%). Contrary to the guideline recommendation, 38% of the participants performed a second resection in the case of pTa low-grade NMIBC. Correct monitoring of Bacille Calmette-Guérin (BCG) response with cystoscopy and cytology was performed by only 34% of the urologists. Conclusions: We found a discrepancy between certain guideline recommendations and daily routine practice concerning the use of urine cytology for initial diagnostics, instillation therapy with a low monitoring rate of BCG response, and follow-up care with unnecessary second resection after pTa low-grade NMIBC in particular. Our survey showed a moderate overall adherence rate of 73%. These results demonstrate the need for sharpening awareness of German guideline recommendations by promoting more intense education of urologists to optimize NMIBC care thus decreasing morbidity and mortality rates.
Toward a Platform for Structured Data Acquisition in Oncology: A Pilot Study on Prostate Cancer Screening
Authors: Henkel Maurice , Mertz Kirsten D. , Laux Jonas , Klan Matthias , Breit Christian , Marston Katharina , Matthias Marc O. , Dugas Sarah G. , Manneck Sebastian , Stieltjes Bram , Seifert Helge , Wetterauer Christian
Published: August 2021

Introduction: Physicians spend an ever-rising amount of time to collect relevant information from highly variable medical reports and integrate them into the patient’s health condition. Objectives: We compared synoptic reporting based on data elements to narrative reporting in order to evaluate its capabilities to collect and integrate clinical information. Methods: We developed a novel system to align medical reporting to data integration requirements and tested it in prostate cancer screening. We compared expenditure of time, data quality, and user satisfaction for data acquisition, integration, and evaluation. Results: In a total of 26 sessions, 2 urologists, 2 radiologists, and 2 pathologists conducted the diagnostic work-up for prostate cancer screening with both narrative reporting and the novel system. The novel system led to a significantly reduced time for collection and integration of patient information (91%, p < 0.001), reporting in radiology (44%, p < 0.001) and pathology (33%, p = 0.154). The system usage showed a high positive effect on evaluated data quality parameters completeness, format, understandability, as well as user satisfaction. Conclusion: This study provides evidence that synoptic reporting based on data elements is effectively reducing time for collection and integration of patient information. Further research is needed to assess the system’s impact for different patient journeys.
Programando-ando: enriquecimiento de capacidades sobresalientes en niños de primaria
Authors: Grimaldo Salazar Edgar , Chávez Soto Blanca Ivet
Published: August 2021

(analytical)This study aimed to identify the effects of the "Programando-Ando" (Programming-ing) Enrichment Program on the academic self-esteem, creativity and intelligence of gifted students in an elementary school. A pretest-post test design was used to assess 13 students who met with the gifted profile, and based on their characteristics the intervention for promoting the digital and verbal skills was designed and applied. The results highlighted positive effects on the children's cognitive skills and creative thinking. In terms of academic self-esteem, a non-significant decrease was found. In conclusion, this intervention program based on enrichment and problem solving through information and communication technology was able to enhance gifted abilities in students.
Keywords: Intelligence, creativity, Educational technology, Information technology, ICT, Elementary education.
Para “descolonizar” o comum: um ensaio crítico sobre a obra de Dardot e Laval
Authors: Silva Rafael Afonso da
Published: August 2021

A obra de Dardot e Laval sobre o comum ainda não foi submetida ao crivo da crítica da colonialidade. Diante dessa lacuna, exploram-se, neste artigo, as potencialidades “decoloniais” dessa obra – localizando-as em sua concepção construtivista do comum –, bem como suas armadilhas “coloniais” – relacionadas com os limites eurocêntricos de sua arqueologia do comum, a subestimação da heterogeneidade das relações de poder e a dificuldade de facear os limites da “língua política” autorizada pelas instituições moderno-ocidentais. Conclui-se com um convite à expansão do imaginário político do comum a partir do repertório de experiências sociais não ocidentais/ não imperiais, sob o imperativo da norma da inapropriabilidade epistêmica ou cosmopolítica.
As mulheres na Economia Social: no centro da ação, longe da decisão
Authors: Monteiro Alcides A.
Published: August 2021

Com este texto, pretende-se alertar para a persistente desproporção entre homens e mulheres nos cargos de liderança das entidades da Economia Social. Para o efeito, observa-se a realidade portuguesa sobre a qual, pela primeira vez, estão disponíveis dados atualizados e a nível nacional, recolhidos pelo INE – Instituto Nacional de Estatística. Refletindo sobre as causas que lhe subjazem, propomo-nos ainda abordar as vias para ultrapassar a segregação de gênero. Neste ponto, partimos de uma constatação importante, a de que existe no seio das mencionadas organizações um bloqueio à mudança decorrente da invisibilidade das questões de gênero e de uma negação do problema, para advogar que uma parte da dinâmica de mudança em favor da igualdade de poder exige atuação interna, ao nível da consciencialização, do empoderamento e de uma abordagem transformadora.
Cross-border Trade Union Networks in Transnational Corporation: A comparison between sectors
Authors: Filho Ricardo Framil , Galhera Katiuscia Moreno , Silva Leonardo Mello e
Published: August 2021

This article analyses cross-border trade union networks in Transnational Corporations (TNCs) in the metal and chemical, garment, retail, and commercial banking sectors in Brazil. Conceptualized as global union responses to the growing reach of TNCs, such networks have been established in different settings in the country and have engaged major corporations outside of traditional industrial relations frameworks, venturing into the controversial field of social dialogue, corporate responsibility, and private governance. From different research backgrounds, our findings suggest that union networks in TNCs can be used to rearrange union prerogatives across different levels but remain embedded in previous institutional structures. In this sense, such unions incorporate existing union boundaries, including the exclusion of relevant groups of workers, even as they can scale up the scope of trade union action.
Labour and globalisation: complexity and transformation
Authors: Munck Ronaldo
Published: August 2021

As a matter of balance of the contributions joined in the Dossier, this final word draws a comprehensive picture of the issues discussed by the authors and raises some questions pointing to a possible agenda for current labor studies. First, it sparks reflections going in the sense of discussing the actual meaning of what is to be considered either “normal” or “healthy” after Covid-19 crisis. Then it addresses such discussion to the world of work with interesting consequences, asking what is actually “normal” in labor relations. In the same vein, it reminds us the role of the so-called “essential workers” during the sanitary crisis: a lot of invisible realities which are now becoming visible. On the other side, the author call attention to imminent economic crisis, affecting jobs and companies. Similarly, he warns about the worsening of the working conditions under a post-Covid world: no “return to normal” is envisioned without shaking important structures of the already-known world. One of those pillars is the North-South divide: according to the author, that divide is loosing because the neat two-worlds mapping is blurred today – we find informality on both “worlds”, as well as either digital economy and inequalites are present North and South, so clear-cut differences may tend to disappear. The author finally proceeds to make a short comment about every of the contributions to the dossier, pointing out what is crucial and distinctive in each of them.
Democracia e luta por hegemonia
Authors: Stival Monica Loyola
Published: August 2021

Este artigo parte do conceito de democracia como forma indeterminada de poder, em um esforço para pensar o sentido concreto da organização social orientada pela democracia, assim compreendida. A democracia parece admitir tanto uma organização material socialista quanto liberal. Daí a necessidade de distinguir o nível formal de abertura democrática e o nível material de luta por hegemonia em que essa alternativa aparece, entendendo ambos como determinações contingentes em disputa.
"O luxo, o comércio e as artes", de Jean-Jacques Rousseau
Authors: Nascimento Luís Fernandes dos Santos
Published: August 2021

Traducão do texto O luxo, o comércio e as artes de Jean-Jacques Rousseau. Esta tradução é precedida de uma paresentação escrita por Thomaz Kawauche.
De la frontera al umbral: transformaciones de la semiosfera cultural en Lotman y Zilberberg
Authors: Yalán Dongo Eduardo , Guerra José Miguel , Campos Robinson
Published: August 2021

El objetivo de este artículo es identificar la construcción de direccionalidades comunes entre los conceptos de frontera y umbral dentro de la teoría semiótica de la cultura a través de Yuri Lotman y Claude Zilberberg. Con esta finalidad, realizamos una revisión crítica, convergente y sintética de la literatura representativa de las propuestas de ambos autores. Este procedimiento metodológico pretende realizar una lectura integrada de los conceptos de frontera y umbral, de manera que estos generen nuevos marcos y perspectivas temáticas en torno a una semiótica de la cultura. La hipótesis es que la articulación del umbral dentro de la teoría de una cultura dependiente de la oposición topológica, fundamental y narrativa entre centro y periferia, permite el retrato de semiosferas más versátiles donde la figura periférica se deshace en los movimientos más ubicuos y temporalmente inestables de culturas particulares como de aquellas semiosferas económicas o de consumo.
Nello specchio dell’antropologia: la natura, la cultura, il semiotico
Authors: Sedda Franciscu
Published: August 2021

Il saggio analizza una serie di prese di posizione antropologiche – quelle di Lévi-Strauss, Geertz, Clifford, Appadurai, Latour, Viveiros de Castro, Descola in particolare – che hanno al centro il rapporto natura/cultura. Esso mostra la ricchezza di visioni e strategie insite in queste posizioni, quanto le loro complesse e spesso inavvertite correlazioni. Il saggio mostra come i raddoppiamenti della natura e della cultura, così come i tentativi di trovare scappatoie all’opposizione, assumano significato in relazione alla semiotica e possano ispirare nuovi modelli per pensare la cultura. In particolare il lavoro antropologico ci darà modo di individuare nel semiotico quella dimensione relazionale che sta al fondo tanto della natura quanto della cultura, che attraversa l’umano e il non umano, che ci sfida come semiotici a ripensare il valore e la forma del nostro stesso relazionalismo.
Resenha "Quando a Política Caminha na Escuridão"
Authors: Falcão Luís
Published: August 2021

Nicolete, Roberta Soromenho. Quando a política caminha na escuridão: interesse e virtude n'A democracia na América de Tocqueville. São Paulo: Alameda, 2018.
O Teatro de Marcelo: historiografia e percepção do espaço teatral (séc. I a.C.)
Authors: Passos Leticia Aga Pereira
Published: August 2021

No período de transição entre República e Principado, juntamente com as artes, literatura e arquitetura, a imagem urbana de Roma foi usada pelo Imperador Augusto como uma ferramenta para legitimar o poder de seu novo governo e sua própria imagem. Como herdeiro de Júlio César, o Princeps objetivou modernizar a cidade construindo grandiosos monumentos públicos. Dentre as construções, situa-se a construção do Teatro de Marcelo, um dos maiores teatros do Império Romano. Utilizado pela primeira vez em 17 a.C. para os Jogos Seculares e dedicado formalmente ao sobrinho e herdeiro do Imperador, o teatro era capaz de receber mais de 15.000 pessoas. Apesar das mudanças lógicas inerentes à passagem do tempo e as restaurações realizadas, a estrutura monumental do teatro permanece até os dias atuais. Assim, aprofundando no estudo do espaço físico teatral, buscaremos expor sobre a construção do Teatro de Marcelo, indicando sua estrutura interna e suas inovações arquitetônicas. Por se tratar de um monumento que encontra um certo abandono na historiografia atual, objetivamos uma ampla discussão dos estudos atuais do Teatro de Marcelo, a qual nos fornece a complexidade de suas plantas baixas e suas descobertas arqueológicas. Por fim, iremos apresentar as duas reconstituições tridimensionais encontradas, debatendo sobre o espaço em 3D com as informações historiográficas.
O ritual do Kiki do povo Kaingang: cultura material de um ritual religioso indígena no Brasil Meridional
Authors: Queiroz Isabella Brandão de , Lino Jaisson Teixeira
Published: August 2021

O Ritual do Kiki é um ritual de culto aos mortos dos Kaingang, etnia indígena do sul e sudeste do Brasil. No período pré-colonial, o ritual era performado anualmente com o objetivo de fornecer aos mortos uma boa transição ao numbê (o mundo dos mortos). Entretanto, com o processo de colonização do Brasil e a consequente catequização imposta aos indígenas, o Kiki parou de ser realizado. Na década de 1970, os Kaingang readotaram o ritual como forma de resistência cultural e identitária aos não indígenas. O último ritual até então realizado aconteceu na Aldeia Condá em 2011, gerando a presente análise etnoarqueológica que visa apontar a centralidade e o significado que a cultura material apresenta no ritual e na vida cotidiana do povo Kaingang.
Predictive Accuracy of a Clinical and Genetic Risk Model for Atrial Fibrillation
Authors: Khurshid Shaan , Mars Nina , Haggerty Christopher M. , Huang Qiuxi , Weng Lu-Chen , Hartzel Dustin N. ,   Regeneron Genetics Center, Lunetta Kathryn L. , Ashburner Jeffrey M. , Anderson Christopher D. , Benjamin Emelia J. , Salomaa Veikko , Ellinor Patrick T. , Fornwalt Brandon K. , Ripatti Samuli , Trinquart Ludovic , Lubitz Steven A.
Published: August 2021

Background:

Atrial fibrillation (AF) risk estimation using clinical factors with or without genetic information may identify AF screening candidates more accurately than the guideline-based age threshold of ≥65 years.

Methods:

We analyzed 4 samples across the United States and Europe (derivation: UK Biobank; validation: FINRISK, Geisinger MyCode Initiative, and Framingham Heart Study). We estimated AF risk using the CHARGE-AF (Cohorts for Heart and Aging Research in Genomic Epidemiology AF) score and a combination of CHARGE-AF and a 1168-variant polygenic score (Predict-AF). We compared the utility of age, CHARGE-AF, and Predict-AF for predicting 5-year AF by quantifying discrimination and calibration.

Results:

Among 543 093 individuals, 8940 developed AF within 5 years. In the validation sets, CHARGE-AF (C index range, 0.720–0.824) and Predict-AF (0.749–0.831) had largely comparable discrimination, both favorable to continuous age (0.675–0.801). Calibration was similar using CHARGE-AF (slope range, 0.67–0.87) and Predict-AF (0.65–0.83). Net reclassification improvement using Predict-AF versus CHARGE-AF was modest (net reclassification improvement range, 0.024–0.057) but more favorable among individuals aged <65 years (0.062–0.11). Using Predict-AF among 99 530 individuals aged ≥65 years across each sample, 70 849 had AF risk <5%, of whom 69 067 (97.5%) did not develop AF, whereas 28 681 had AF risk ≥5%, of whom 2264 (7.9%) developed AF. Of 11 379 individuals aged <65 years with AF risk ≥5%, 435 (3.8%) developed AF before age 65 years, with roughly half (46.9%) meeting anticoagulation criteria.

Conclusions:

AF risk estimation using clinical factors may prioritize individuals for AF screening more precisely than the age threshold endorsed in current guidelines. The additional value of genetic predisposition is modest but greatest among younger individuals.
On subfamily structure of the Cupedidae (Coleoptera, Archostemata): data from paleontology and an approach to solving conflicting classifications
Authors: KIREJTSHUK ALEXANDER G.
Published: August 2021

This paper demonstrates some of main differences between the systematic constructions based mostly on paleontological research and constructions involving the other approaches. Some reasons for these differences are discussed, together with an approach to solve contradictions between the conflicting hypotheses. The multiple (multidimensional) parallelism gives a possibility to solve many problems of phylogenetic interrelations due to reconstructions based on coincidence of patterns of changes (series of interconnected facts) traced in different aspects of evolutionary processes. This principle originates in the ideas by Jean Agassiz and Ernst Haeckel defined as the principle of triple parallelism. Other aspects of the evolution can be added to the morphology, embryology, and paleontology, initially included in this method. The molecular method is one of such aspects. It is shown that the potential resolution of the morphological and molecular approaches in some cases could be rather restricted, particularly applying ancient groups with main evolutionary transformations passed far in the past. The infraorder Cupediformia and suborder Archostemata in general are examples of such cases. It is advisable in the current research period that has followed the previous interpretation of the systematic structure of the family Cupedidae recognizing three subfamilies with not quite distinct hiatus between them (Cupedinae, Ommatinae and Triadocupedinae). Some recent morphological and molecular approaches proposed to divide the Cupedidae into two separate families on the basis of incomplete information accessible after study of only modern representatives, as most events in the family evolution occurred during the Palaeozoic and Mesozoic, and these events are scarcely possible to trace without considering fossils. As the principle of multiple parallelism cannot be currently used for archostematans to the full extent of its power, it is necessary to choose the paleontological method of phylogenetic reconstruction as crucial. This approach is preferable for groups that are well-documented through very diverse fossils, and for which only few of its remnants of the past diversity reached the modern epoque.
Further evidence of Cretaceous termitophily: Description of new termite hosts of the trichopseniine Cretotrichopsenius (Coleoptera: Staphylinidae), with emendations to the classification of lower termites (Isoptera)
Authors: JIANG RI-XIN , ZHANG HONG-RUI , ELDREDGE K. TARO , SONG XIAO-BIN , LI YAN-DA , TIHELKA ERIK , HUANG DI-YING , WANG SHUO , ENGEL MICHAEL S. , CAI CHEN-YANG
Published: August 2021

Termites (Isoptera) are among the most ecologically ubiquitous of terrestrial eusocial insects and provide an attractive environment for symbionts, which have evolved numerous times independently, and in lineages as diverse as millipedes and beetles. Previous studies reported the discovery of unequivocal termitophily in mid-Cretaceous amber from northern Myanmar, providing evidence that pushed the origin of termitophily back into the Mesozoic. Here we report the discovery of two more pieces of Cretaceous amber containing individuals of the trichopseniine rove beetle Cretotrichopsenius burmiticus Cai et al., 2017 (Staphylinidae: Aleocharinae: Trichopseniini) preserved together with their potential host termites, providing further evidence regarding the association between these two insect lineages. Two new termite species and genera are described as putative hosts for C. burmiticus: Arceotermes hospitis Engel & Jiang, gen. et sp. nov. and Tanytermitalis philetaerus Engel & Cai, gen. et sp. nov. Each is included in a new family, Arceotermitidae Engel, fam. nov. (type genus: Arceotermes Engel & Jiang, gen. nov.), and Tanytermitidae Engel, fam. nov. (type genus: Tanytermes Engel et al., 2007). In order to better characterize these two families the classification of lower Isoptera and clade Xylophagodea (= Cryptocercidae + Isoptera) is emended with the following new taxa: Idanotermitinae Engel, subfam. nov.; Melqartitermitidae Engel, fam. nov.; Mylacrotermitidae Engel, fam. nov.; Krishnatermitidae Engel, fam. nov.; Cosmotermitinae Engel, subfam. nov.; Hodotermopsinae Engel, subfam. nov.; Artisoptera Engel, minord. nov.; Cryptocercaptera Engel, infraord. nov. Lower termites were remarkably diverse during the mid-Cretaceous but declined in diversity considerably by the Palaeogene. The fossil rove beetle Cretotrichopsenius Cai et al., 2017 currently provides the earliest definitive evidence of termitophily and the complex association between rove beetles and termites.
The earliest record of fossil solid-wood-borer larvae—immature beetles in 99 million-year-old Myanmar amber
Authors: HAUG CAROLIN , HAUG GIDEON T. , ZIPPEL ANA , VAN DER WAL SERITA , HAUG JOACHIM T.
Published: August 2021

Interactions between animals and plants represent an important driver of evolution. Especially the group Insecta has an enormous impact on plants, e.g., by consuming them. Among beetles, the larvae of different groups (Buprestidae, Cerambycidae, partly Eucnemidae) bore into wood and are therefore called wood-borer larvae or borers. While adults of these beetle groups are well known in the fossil record, there are barely any fossils of the corresponding larvae. We report here four new wood-borer larvae from Cretaceous Kachin amber (Myanmar, ca. 99 Ma). To compare these fossils with extant wood-borer larvae, we reconstructed the body outline and performed shape analysis via elliptic Fourier transformation and a subsequent principal component analysis. Two of the new larvae plot closely together and clearly in the same area as modern representatives of Buprestidae. As they furthermore lack legs, they are interpreted as representatives of Buprestidae. The other two new larvae possess legs and plot far apart from each other. They are more difficult to interpret; they may represent larvae of early offshoots of either Cerambycidae or Buprestidae, which still retain longer legs. These findings represent the earliest fossil record of larvae of Buprestidae and possibly of Cerambycidae known to date.
International Palaeoentomological Society—20 years after
Authors: SZWEDO JACEK
Published: August 2021

Fossilised insects probably brought man’s attention since the prehistory, since first amber with an insect entombed in resin was found. Amber was collected and used by humans first in the Upper Paleolithic period, perhaps as long ago as 20,000 years (Beck et al., 2009; Burdukiewicz, 2009; Płonka & Kowalski, 2017). The written testimonies on amber inclusions goes back to Ancient Rome (Plinius Secundus, 77). During 17th and 18th centuries the inclusions in amber were noted by philosophers (Bacon, 1638), their values discussed and illustrated (e.g., Sendel, 1742) and their importance to understanding the history of life pointed (Kant in Hagen, 1821). Shortly after Linnaeus “Systema Naturae” editions, the first research using binomial names for insect included in the copal was published (Bloch, 1776) and Pleistocene record of Recent beetle was noted by Fabricius (1775). Notes and information on fossil insects from imprints and amber were presented by Lang (1708), Bertrand (1763), Linnaeus (1778) and Volta (1796). The first regular description of beetle inclusion in Baltic amber came from Gravenhorst (1806) and works of de Serres (1828, 1829) seems to be the first with more detailed overview and description of insects as adpression fossils. Therefore, human’s palaeoentomological interests predates official beginning of modern taxonomy and palaeoentomology as science is as old as modern entomology (Azar et al., 2018).
Corrigendum: A new stonefly species (Plecoptera: Perlodidae) from Eocene Baltic amber and questions on the wing venation potential for species diagnostic of fossil Plecoptera
Authors: JOUAULT CORENTIN , LEGENDRE FRÉDÉRIC , CONDAMINE FABIEN L. , NEL ANDRÉ
Published: August 2021

In the paper ‘A new stonefly species (Plecoptera: Perlodidae) from Eocene Baltic amber and questions on the wing venation potential for species diagnostic of fossil Plecoptera’, we figured and discussed on a specimen of the plecopteran Pteroliriope sinitshenkovae Cui, Béthoux, Kondratieff, Shih & Ren, 2016 (Jouault et al., 2021: figs 5–6), under the accession number MNHN.F.A71351, of the collection of the Muséum National d’Histoire Naturelle in Paris, France. The repository number has been corrected to fit with the recent ‘parachute research’ issue (DeMiguel et al., 2021). Therefore, the specimen is in fact deposited in the collection of the Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science, China, under the accession number NIGP176250.