bluuebunny/crossref_metadata_2025 huggingface dataset:
Monaural Musical Octave Sound Separation Using Relaxed Extended Common Amplitude Modulation
Authors: Gong Yukai , Dai Longquan
Published: November 2021

Monaural music sound separation isolates individual instrument sources from a mono-channel polyphonic mixture. The primary challenge is to separate the source partials overlapped in time-frequency regions, especially for the full overlapping cases that at least one source does not have any nonoverlapping partial. Due to the lack of effective methods to separate the sources with full overlapping partials, this paper put forward a relaxed extended common amplitude modulation (RECAM) approach to deal with the octave sound separation, one of the most difficult cases. Our strategy uses a multi-band co-processing way for each short-time partial wave segment. Extensive experiments are conducted on octave mixture samples drawn from the Iowa University Musical Instrument Database. Results confirm that our RECAM achieves the best separation performance. For nonvibrato and vibrato mixtures, the average improvement of RECAM in each measure exceeds 3dB and 2dB, respectively.
Optimal rendezvous on a line by location-aware robots in the presence of spies*
Authors: Chuangpishit Huda , Czyzowicz Jurek , Killick Ryan , Kranakis Evangelos , Krizanc Danny
Published: November 2021

A set of mobile robots is placed at arbitrary points of an infinite line. The robots are equipped with GPS devices and they may communicate their positions on the line to a central authority. The collection contains an unknown subset of “spies”, i.e., byzantine robots, which are indistinguishable from the non-faulty ones. The set of the non-faulty robots needs to rendezvous in the shortest possible time in order to perform some task, while the byzantine robots may try to delay their rendezvous for as long as possible. The problem facing a central authority is to determine trajectories for all robots so as to minimize the time until all the non-faulty robots have met. The trajectories must be determined without knowledge of which robots are faulty. Our goal is to minimize the competitive ratio between the time required to achieve the first rendezvous of the non-faulty robots and the time required for such a rendezvous to occur under the assumption that the faulty robots are known at the start.

In this paper, we give rendezvous algorithms with bounded competitive ratio, where the central authority is informed only of the set of initial robot positions, without knowing which ones or how many of them are faulty. In general, regardless of the number of faults [Formula: see text] it can be shown that there is an algorithm with bounded competitive ratio. Further, we are able to give a rendezvous algorithm with optimal competitive ratio provided that the number [Formula: see text] of faults is strictly less than [Formula: see text]. Note, however, that in general this algorithm does not give an estimate on the actual value of the competitive ratio. However, when an upper bound on the number of byzantine robots is known to the central authority, we can provide algorithms with constant competitive ratios and in some instances we are able to show that these algorithms are optimal. Moreover, in the cases where the number of faults is either [Formula: see text] or [Formula: see text] we are able to compute the competitive ratio of an optimal rendezvous algorithm, for a small number of robots.
An analytical approach to evaluate effective coefficients of 1–3 piezoelectric composites
Authors: Singh Sanjeev Kumar , Panda Saroja Kanta
Published: November 2021

In this paper, a micromechanics method is developed to evaluate effective coefficients of piezoelectric fiber-reinforced composites. An exact solution is derived for effective elastic, piezoelectric and dielectric coefficients of such piezocomposites subjected to the applied load in the direction transverse to the fiber orientation. Simultaneously, based on finite element method, a numerical study is performed on a representative volume element of such piezo composite containing fiber in square packing arrangement. The finite element method provides a numerical solution to evaluate effective elastic, piezoelectric and dielectric coefficients for discrete volume fraction of fiber, the range being 0.1–0.6 for this study. The results are interpolated to understand the overall behavior of such piezocomposites. The results obtained from the micromechanics method and the finite element method are compared with the results obtained from other models based on strength of materials method given in the literature. It is observed that the method developed in this study provides better results for effective coefficients susceptible to fiber packing arrangements.
Predicting Vodka Adulteration: A Combination of Electronic Tongue and Artificial Neural Networks
Authors: Marenco Leonardo Fabio León , de Oliveira Luiza Pereira , Vale Daniella Lopez , Salles Maiara Oliveira
Published: November 2021

An artificial neural network was used to build models caple of predicting and quantifying vodka adulteration with methanol and/or tap water. A voltammetric electronic tongue based on gold and copper microelectrodes was used, and 310 analyses were performed. Vodkas were adulterated with tap water (5 to 50% (v/v)), methanol (1 to 13% (v/v)), and with a fixed addition of 5% methanol and tap water varying from 5 to 50% (v/v). The classification model showed 99.5% precision, and it correctly predicted the type of adulterant in all samples. Regarding the regression model, the root mean squared error was 3.464% and 0.535% for the water and methanol addition, respectively, and the prediction of the adulterant content presented an R2 0.9511 for methanol and 0.9831 for water adulteration.
An Optimization Model of Raw Material Supply Chain Using Improved Genetic Algorithm for Primary and Secondary School Uniform under IoT Environment
Authors: Cui Yumei , Feng Xinqun
Published: November 2021

With the development of intelligent technology, the life cycle of products is becoming shorter and shorter. The traditional mode of supply chain selection cannot meet the demand of productivity development. Scientific and reasonable choice of school uniforms’ raw material supply chain is a necessary condition to assist school’s normal operation. Therefore, an optimization model for primary and secondary school clothing raw material supply chain based on the internet of things is proposed. In order to optimize the raw materials supply chain of primary and secondary school uniform, a model based on the internet of things is proposed. In the environment of the internet of things, from the perspective of supply chain configuration and enterprise’s expected risk minimization, this paper establishes the optimization model of raw material supply chain of primary and secondary school uniform based on the internet of things. Through the improved genetic algorithm to solve the model, the best raw material supply chain of primary and secondary school uniform is obtained. The simulation results show that the proposed model can effectively improve the asset utilization and execution efficiency of the supply chain and reduce the cost of the raw material supply chain of primary and secondary school uniform.
Impact of Cold Weather on Setup Errors in Radiotherapy
Authors: Zhao Shuxue , Lu Xianfa , Zou Jiasen , Xu Zhouying , Wei Siyu , Li Liping , Fu Qingguo
Published: November 2021

Objective. To investigate the influence of cold weather on setup errors of patients with chest and pelvic disease in radiotherapy. Methods. The image-guided data of the patients were collected from the Radiotherapy Center of Cancer Hospital Affiliated to Guangxi Medical University from October 2020 to February 2021. During this period, the cold weather days were December 15, 16, and 17, 2020, and January 7 and 8, 2021. For body fixation in radiotherapy, an integrated plate and a thermoplastic mold were employed in 18 patients with chest disease, while an integrated plate and a vacuum pad were applied in 19 patients with pelvic disease. All patients underwent cone beam computed tomography (CBCT) scans in the first five treatments and once a week thereafter. The obtained data were registered to the planning CT image to get the setup errors of the patient in the translational direction including X, Y, and Z axes and rotational direction including RX, RY, and RZ. Then, the Mann–Whitney U test was performed. The expansion boundary values of the chest and pelvis were calculated according to the formula

M

PTV

=
2.5

∑

+
0.7
δ

. Results. A total of 286 eligible results of CBCT scans were collected. There were 138 chest CBCT scans, including 26 taken in cold weather and 112 in usual weather, and 148 pelvic CBCT scans, including 33 taken in cold weather and 115 in usual weather. The X-, Y-, and Z-axis translational setup errors of patients with chest disease in the cold weather group were 0.16 (0.06, 0.32) cm, 0.25 (0.17, 0.52) cm, and 0.35 (0.21, 0.47) cm, respectively, and those in the usual weather group were 0.14 (0.08, 0.29) cm, 0.23 (0.13, 0.37) cm, and 0.18 (0.1, 0.35) cm, respectively. The results indicated that there was a statistical difference in the Z-axis translational error between the cold weather group and the usual weather group (U = 935.5;

p
=
0.005
<
0.05

), while there was no statistical difference in the rotational error between the two groups. The external boundary values of X, Y, and Z axes in the cold weather group were 0.57 cm, 0.92 cm, and 0.99 cm, respectively, and those in the usual weather group were 0.57 cm, 0.78 cm, and 0.68 cm, respectively. There was no significant difference in the translational and rotational errors of patients with pelvic disease between the cold weather group and the usual weather group (

p
<
0.05

). The external boundary values of X, Y, and Z axes were 0.63 cm, 0.79 cm, and 0.68 cm in the cold weather group and 0.61 cm, 0.79 cm, and 0.61 cm in the usual weather group, respectively. Conclusion. The setup error of patients undergoing radiotherapy with their bodies fixed by an integrated plate and a thermoplastic mold was greater in cold weather than in usual weather, especially in the ventrodorsal direction.
RnkHEU: A Hybrid Feature Selection Method for Predicting Students’ Performance
Authors: Xiao Wen , Ji Ping , Hu Juan
Published: November 2021

Predicting students’ performance is one of the most concerned issues in education data mining (EDM), which has received more and more attentions. Feature selection is the key step to build prediction model of students’ performance, which can improve the accuracy of prediction and help to identify factors that have significant impact on students’ performance. In this paper, a hybrid feature selection method named rank and heuristic (RnkHEU) was proposed. This novel feature selection method generates the set of candidate features by scoring and ranking firstly and then uses heuristic method to generate the final results. The experimental results show that the four major evaluation criteria have similar performance in predicting students’ performance, and the heuristic search strategy can significantly improve the accuracy of prediction compared with forward search method. Because the proposed RnkHEU integrates ranking-based forward and heuristic search, it can further improve the accuracy of predicting students’ performance with commonly used classifiers about 10% and improve the precision of predicting students’ academic failure by up to 45%.
Extensions of Ostrowski Type Inequalities via
h
-Integrals and s-Convexity
Authors: Khan Khuram Ali , Awan Khalid Mahmood , Ditta Allah , Nosheen Ammara , Matendo Rostin Mabela
Published: November 2021

In this paper, Hölder, Minkowski, and power mean inequalities are used to establish Ostrowski type inequalities for

s

-convex functions via

h

-calculus. The new inequalities are generalized versions of Ostrowski type inequalities available in literature.
Development and Verification of an Immune-Based Gene Signature for Risk Stratification and Immunotherapeutic Efficacy Assessment in Gastric Cancer
Authors: Qiu Feng , Zhu Yumei , Shi Yafeng , Ji Jingjing , Jin Yingchao
Published: November 2021

Objective. Due to the molecular heterogeneity of gastric cancer, only minor patients respond to immunotherapeutic schemes. This study is aimed at developing an immune-based gene signature for risk stratification and immunotherapeutic efficacy assessment in gastric cancer. Methods. An immune-based gene signature was developed in gastric cancer by LASSO method in the training set. The predictive performance was validated in the external datasets. KEGG pathways related to risk scores were assessed by GSEA. Based on multivariate Cox regression analysis, a nomogram was established. Sensitivity to chemotherapy drugs was evaluated between high- and low-risk samples. The relationships of risk scores with infiltration levels of immune cells, stromal scores, immune scores, immune cell subgroups, and overall response to anti-PD-L1 therapy were determined. Results. Our results showed that high risk scores were indicative of undesirable survival outcomes both in the training set (

p
<
0.0001

) and the validation set (

p
=
0.002

). Moreover, this signature could independently predict patients’ survival (HR: 2.656 (1.919-3.676) and

p
<
0.001

). Subgroup analysis confirmed the sensitivity of this signature in predicting prognosis (all

p
<
0.05

). Cancer-related pathways were primarily enriched in high-risk samples, such as MAPK and TGF-β pathways (

p
<
0.05

). By incorporating stage and the risk score, we established a nomogram for predicting one-, three-, and five-year survival probability. Patients with high-risk scores were more sensitive to chemotherapy drugs (

p
<
0.05

). There was heterogeneity in immune cells between high- and low-risk samples (

p
<
0.05

). Samples with progressive disease exhibited the highest risk score, and those with complete response had the lowest risk score (

p
<
0.05

). Conclusion. This immune-based gene signature might be representative of a promising prognostic classifier for predicting risk stratification and immunotherapeutic efficacy in gastric cancer, assisting personalized therapy and follow-up plan.
Ultrasound Image-Guided Pudendal Nerve Block on Analgesic Effect of Perineotomy under Optimized Fast Super Resolution Reconstructed Convolutional Neural Network Algorithm
Authors: Zhang Shanni , Zhao Xiaoying , Zhao Guixu , Zhang Linyi , Xiu Yufang
Published: November 2021

This work was aimed to study the analgesic effect of pudendal nerve block on obstetrics and gynecology under the guidance of ultrasound image based on optimized fast super resolution reconstructed convolutional neural network (FSRCNN) algorithm. A total of 110 primiparas from hospital who gave birth through vagina were randomly rolled into experimental group (55 cases) and control group (55 cases). The optimized FSRCNN algorithm was constructed, compared with the FSRCNN algorithm and the Bicubic algorithm and applied to 110 cases of maternal patients undergoing perineotomy under ultrasound image-guided pudendal nerve block. Visual analogue scoring (VAS), incision suture pain VAS score, occurrence of complications, puerpera labor time, and newborn weight were recorded and compared, so did Apgar score of newborns, numbness of maternal thigh, recovery of puncture site, and satisfaction of maternal analgesia. The results showed that the peak signal-to-noise ratio (PSNR) of the high-resolution image reconstructed by the FSRCNN algorithm was 32.68 dB and that reconstructed by the optimized FSRCNN algorithm was 32.19 dB. The PSNR of the Bicubic algorithm processed image was 28.51 dB. In the lateral resection of episiotomy in the second stage of labor, the visual analog score (2.3 ± 1.5 points) of the experimental group was inferior to that of the control group (7.1 ± 2.6 points) (

P
<
0.05

). The visual analogue score of stitch pain (1.3 ± 0.8 points) was also inferior to that of the control group (5.2 ± 1.9 points) (

P
<
0.05

). Moreover, the satisfaction of the parturients in the experimental group (9.86 ± 0.41 points) was considerably superior to that of the control group (7.36 ± 1.25 points) (

P
<
0.05

). In short, the optimized FSRCNN algorithm had a short training time and good reconstruction effect. Ultrasound-guided pudendal nerve block had a substantial analgesic effect on the second stage of labor and improved parturients’ satisfaction.
Complete Hausdorffness and Complete Regularity on Supra Topological Spaces
Authors: Al-shami T. M.
Published: November 2021

The supra topological topic is of great importance in preserving some topological properties under conditions weaker than topology and constructing a suitable framework to describe many real-life problems. Herein, we introduce the version of complete Hausdorffness and complete regularity on supra topological spaces and discuss their fundamental properties. We show the relationships between them with the help of examples. In general, we study them in terms of hereditary and topological properties and prove that they are closed under the finite product space. One of the issues we are interested in is showing the easiness and diversity of constructing examples that satisfy supra

T

i

spaces compared with their counterparts on general topology.
On Omega Index and Average Degree of Graphs
Authors: Delen Sadik , Demirci Musa , Cevik Ahmet Sinan , Cangul Ismail Naci
Published: November 2021

Average degree of a graph is defined to be a graph invariant equal to the arithmetic mean of all vertex degrees and has many applications, especially in determining the irregularity degrees of networks and social sciences. In this study, some properties of average degree have been studied. Effect of vertex deletion on this degree has been determined and a new proof of the handshaking lemma has been given. Using a recently defined graph index called

o
m
e
g
a

index, average degree of trees, unicyclic, bicyclic, and tricyclic graphs have been given, and these have been generalized to

k

-cyclic graphs. Also, the effect of edge deletion has been calculated. The average degree of some derived graphs and some graph operations have been determined.
Effect of Eriodictyol on Retinoblastoma via the PI3K/Akt Pathway
Authors: Wen Shu , Hu Meng , Xiong Yan
Published: November 2021

Retinoblastoma (RB) is one of the most common intraocular malignancies in children, which causes vision loss and even threatens life. Eriodictyol is a natural flavonoid with strong anticancer activity. Some studies have shown that eriodictyol exerts anticancer effects in glioma, colon cancer, and lung cancer; however, no studies have reported the anticancer effects of eriodictyol on RB. Therefore, the aim of this study was to investigate the anticancer activity of eriodictyol against the RB Y79 cell line and its potential mechanism of action. Interestingly, we found that eriodictyol inhibited the proliferation, migration, and invasion of Y79 cells in a dose-dependent manner and decreased the expression of MMP-2 and MMP-9 proteins in the cells. In addition, eriodictyol-induced apoptosis in Y79 cells was assessed by flow cytometry and immunoblotting. Here, our study revealed that eriodictyol dose dependently inhibited the activation of the PI3K/Akt signaling pathway. Notably, the effect of eriodictyol on RB apoptosis was reversed by a PI3K agonist 740 Y-P. In conclusion, our study shows that eriodictyol effectively inhibits proliferation, migration, and invasion and induces apoptosis in RB cell lines, which may be the result of blocking the PI3K/Akt signaling pathway. Thus, eriodictyol may provide a new theoretical basis for exploring targeted antitumor natural therapies.
Experimental Study and Numerical Study on Shear Bearing Capacity of Shear Key Joints of Reinforced Concrete Open‐Web Sandwich Plates
Authors: Lu Hongna , Zhang Huagang , Ma Kejian , Wu Qin , Jiang Lan
Published: November 2021

The shear key in the reinforced concrete open‐web sandwich plate (RCOSP) is a block joint that connects with the top chord and the bottom chord. In order to understand the failure mode of the shear key and verify the accuracy of the current algorithm, a total of 9 test pieces are prepared and classified 3 groups were assigned longitudinal reinforcement (LR) ratios of 0.49%, 0.82%, and 1.24%, respectively. The horizontal concentrated static loading under simple support condition is carried out. The test results show that the shear key is horizontally cut and the concrete is pulled apart or crushed along the direction of chord width at the shear key‐chords area; the strain level of the concrete and stirrup of the shear key is lower averagely; the development of the horizontal displacement and the strain of the longitudinal bars of the test pieces goes through elastic, elastoplastic, and plastic stages; the ultimate load of the test pieces has almost no relationship with the reinforcement ratio of shear key but is controlled by the degree of crack development in the area where shear key connects with the chords. To avoid the current algorithm overestimating the shear capacity of shear key, the restricted condition of shear section is proposed. The finite element analysis (FEA) further verifies that the restricted condition of shear section proposed in this paper is reasonable and necessary.
Cross-Level Impact of Macro Social Capital on Workers’ Health: The Mediating Role of Workers’ Status and the Regulating Role of Medical Security System
Authors: Wang Xiaoyan
Published: November 2021

Based on the definition of macro social capital in the field of health, this paper explores the impact of macro social capital on laborers’ health, the intermediary role of laborers’ status, and the regulatory role of medical security system by using the data of China Labor Force Dynamic Survey (CLDS) in 2016 and hierarchical linear model (HLM). The results show that improving the level of regional economic development and increasing the government total investment in health are helpful to improve the health of local people and further verify that improving personal health depends more on the government health expenditure than on private health expenditure. At the same time, the empirical results show that only the subjective well-being of laborers and the satisfaction of family economic status partially mediate the promotion of macro social capital on health; although macro social capital helps to improve individual health, its influence is declining with the improvement of the type of health insurance. When making policies, we should focus on strengthening the improvement of the overall health level of the society, rather than investing more human and material resources in some special groups. In the future, the government should further increase the government’s expenditure on public health, build a livelihood network of basic medical insurance, and promote the health of workers.
Estimations of Upper Bounds for
n
-th Order Differentiable Functions Involving
χ
-Riemann–Liouville Integrals via
γ
-Preinvex Functions
Authors: Talib Sadia , Awan Muhammad Uzair
Published: November 2021

A new fractional integral identity is obtained involving

n

-th order differentiable functions and

χ

-Riemann–Liouville fractional integrals. Then, some associated estimates of upper bounds involving

γ

-preinvex functions are obtained. In order to relate some unrelated results, several special cases are discussed.
Machine-Based Transliterate of Ottoman to Latin-Based Script
Authors: Jaf Ashti Afasyaw , Kayhan Sema Koç
Published: November 2021

In this paper, a machine-based transliterate is presented. The automatic transliteration of Ottoman to the modern Latin Turkish script can open a big window for scientists in fields of history and literature while most of the Turkish people are not familiar with Ottoman script, despite the fact that no concrete solution has been proposed yet for this issue. The proposed method includes several steps since the transliteration process of Ottoman alphabet to Latin base consists of many problems; the first is the basic character mapping which covers the regular pronunciation and orthography mapping. On the other hand, covering other irregular and extraordinary cases is based on rules and normalization. The transliteration system achieved 73.9% accuracy in general.
Reenvisioning Traditional to Regenerative Therapeutic Advances in Managing Nonalcoholic Fatty Liver Disease in Diabetes Mellitus
Authors: Tsai Lung-Wen , Lu Yi-Hsiang , Dubey Rajni , Chiou Jeng-Fong
Published: November 2021

Reports indicate the increasing prevalence of liver disorders in diabetes mellitus (DM) patients. Clinically, it has also been revealed that the existence of nonalcoholic fatty liver disease (NAFLD) enhances the incidence of type 2 diabetes mellitus (T2DM), while T2DM exacerbates NAFLD to extremely severe forms of steatohepatitis, cirrhosis, and hepatocellular carcinoma. This implies the coexistence and bidirectional nature of NAFLD and T2DM, which function synergistically to drive adverse consequences in clinical practice. For treatment of such comorbid state, though the existing practices such as lifestyle management, traditional Chinese medicines (TCM), and pharmaceuticals have offered somewhat relief, the debate continues about the optimal therapeutic impacts. Recent developments in the field of tissue engineering have led to a renewed interest in novel biomaterial alternatives such as stem cells. This might be attributable to their differentiation potential towards hepatic and pancreatic lineage. These cellular therapies could be further complemented by platelet-derived biomaterials, TCM formulations, or any specific drug. Based on these abovementioned approaches, we aimed to comprehensively analyze various preclinical and clinical studies from traditional to regenerative therapeutic approaches in managing concomitant NAFLD and T2DM.
Role and Function of T Cell-Derived Exosomes and Their Therapeutic Value
Authors: Shao Yuanyuan , Pan Xiaofeng , Fu Rong
Published: November 2021

Exosomes are membrane-bound extracellular vesicles that are produced in the endosomal compartment of most eukaryotic cells. Containing proteins, RNA, and DNA, exosomes mediate intercellular communication between different cell types by transferring their contents and thus are involved in numerous physiological and pathological processes. T cells are an indispensable part of adaptive immunity, and the functions of T cell-derived exosomes have been widely studied. In the more than three decades since the discovery of exosomes, several studies have revealed that T cell-derived exosomes play a novel role in cell-to-cell signaling, especially in inflammatory responses, autoimmunity, and infectious diseases. In this review, we will summarize the function of T cell-derived exosomes and their therapeutic potential.
Strength, Hydraulic, and Microstructural Characteristics of Expansive Soils Incorporating Marble Dust and Rice Husk Ash
Authors: Jalal Fazal E. , Mulk Sultani , Memon Shazim Ali , Jamhiri Babak , Naseem Ahsan
Published: November 2021

Expansive/swell‐shrink soils exhibit high plasticity and low strength, which lead to settlement and instability of lightly loaded structures. These problematic soils contain various swelling clay minerals that are unsuitable for engineering requirements. In an attempt to counter the treacherous damage of such soils in modern geotechnical engineering, efforts are underway to utilize environmentally friendly and sustainable waste materials as stabilizers. This study evaluates the strength and consolidation characteristics of expansive soils treated with marble dust (MD) and rice husk ash (RHA) through a multitude of laboratory tests, including consistency limits, compaction, uniaxial compression strength (UCS), and consolidation tests. By using X‐ray diffraction (XRD) and scanning electron microscopy (SEM) analyses, the effect of curing on UCS after 3, 7, 14, 28, 56, and 112 days was studied from the standpoint of microstructural changes. Also, the long‐term strength development of treated soils was analyzed in terms of the interactive response of impacting factors with the assistance of a series of ANN‐based sensitivity analyses. It is found from the results that the addition of MD and RHA lowered down the water holding capacity, thereby causing a reduction in soil plasticity (by 21% for MD and 14.5% for RHA) and optimum water content (by 2% for MD and increased by 6% for RHA) along with an increase in the UCS (for 8% MD from 97 kPa to 471 kPa and for 10% RHA from 211 kPa to 665 kPa, after 3 days and 112 days of curing, respectively). Moreover, from the oedometer test results, mv initially increased up to 6% dosage and then dropped with further increase in the preconsolidation pressure. Furthermore, the compression index dropped with an increase in the preconsolidation pressure and addition of MD/RHA, while the coefficient of permeability (k) of RHA stabilized soil was higher than that of MD‐treated samples for almost all dosage levels. The formation of the fibrous cementitious compounds (C‐S‐H; C‐A‐H) increased at optimum additive dosage after 7 days and at higher curing periods. Hence, the use of 10% RHA and 12% MD as replacement of the expansive soil is recommended for higher efficacy. This research would be helpful in reducing the impacts created by the disposal of both expansive soil and industrial and agricultural waste materials.
Characterization and Stability of Multimixed Additive-Quartic Mappings: A Fixed Point Application
Authors: Bodaghi Abasalt , Alias Idham Arif , Mousavi Lida , Hosseini Sedigheh
Published: November 2021

In this article, we introduce the multi-additive-quartic and the multimixed additive-quartic mappings. We also describe and characterize the structure of such mappings. In other words, we unify the system of functional equations defining a multi-additive-quartic or a multimixed additive-quartic mapping to a single equation. We also show that under what conditions, a multimixed additive-quartic mapping can be multiadditive, multiquartic, and multi-additive-quartic. Moreover, by using a fixed point technique, we prove the Hyers-Ulam stability of multimixed additive-quartic functional equations thus generalizing some known results.
Effect of Annular Gas‐Liquid Two‐Phase Flow on Dynamic Characteristics of Drill String
Authors: Wang Baojin , Wang Zhongyang , Wang Liuci , Sun Pengyu
Published: November 2021

Natural gas hydrate (NGH) is a kind of new type green energy source with giant reserves which has been thought of highly by energy explorers in the world. However, NGH breaks down to produce some natural gas that enters the annulus and flows together with the drilling fluid. The gas‐liquid two‐phase flow can have an impact on the work of the drill string. Therefore, it is important to study gas‐liquid two‐phase flow in the annulus on the dynamic characteristics of the drill string. In this article, taking a single drill string as the research object, a fluid‐structure coupled finite element mathematical model of two‐phase flow in the annulus and drill string is established based on computational fluid dynamics and computational structural dynamics theory. The finite element numerical simulation method is used to analyze the influence of drilling fluid and natural gas in the annulus on the dynamic characteristics of the drill string. The simulation analysis shows the following: (1) The motion of drilling fluid or natural gas in the annulus will reduce the natural frequency of the drill string, and the drilling fluid has a greater impact on the natural frequency of the drill string. (2) When single‐phase drilling fluid flows in the annulus, the displacement peak in different directions, maximum equivalent stress, and strain of the drill string increase with the increase of the drilling fluid flow velocity or pressure, and the drilling fluid pressure has a more significant effect. (3) When the gas‐liquid two‐phase fluid flows in the annulus, the displacement peak, maximum equivalent stress, velocity amplitude, and acceleration amplitude of the drill string all increase with the natural gas flow velocity and natural gas content increase, and the natural gas flow velocity has a more significant effect.
Re-existências: notas de uma antropóloga negra em meio a concursos públicos para o cargo de magistério superior
Authors: Alencar Alexandra Eliza Vieira
Published: November 2021

Graças às políticas de ações afirmativas com reserva de vagas nas universidades públicas brasileiras vivemos atualmente um período de visibilidade de negros/as, indígenas, pessoas de baixa renda, quilombolas, populações LGBTT+, dentre outras. Essas presenças diversas no contexto universitário nos convidam ao exercício reflexivo sobre o ser/fazer universidade. Ao concluir nossas formações em nível superior, nos encontramos nas lutas cotidianas de buscar oportunidades profissionais que abarquem esses/as sujeitos/as em um sistema capital que continua estruturado por várias perspectivas opressivas, como o racismo e o sexismo. Assim, a partir das propostas teóricas de Alberto Guerreiro Ramos sobre a relação entre o negro-tema e o negro-vida e do amor como prática de liberdade de bell hooks, este artigo pretende tecer algumas grafias de re-existências diante da participação de uma antropóloga negra em concursos públicos para o cargo de magistério superior em universidade pública do sul do Brasil.
Formas de governo e complementaridade entre a administração estatal e seus administrados: reflexões a partir de um serviço para homens autores de violência doméstica
Authors: Lopes Paulo Victor Leite
Published: November 2021

Esse artigo reflete como determinadas formas de governo, apreendidas etnograficamente por meio de minha inserção como pesquisador em uma instância administrativa na Baixada Fluminense do Rio de Janeiro, são (re)elaboradas na atuação de um “serviço” destinado a “homens autores de violência doméstica”. Nesse sentido, trata-se de uma investigação acerca de processos de formação de Estado, cuja ênfase encontra-se nas práticas, dinâmicas e interações estabelecidas cotidianamente por administradores – “os técnicos” – e administrados – “os homens” –, bem como entre diferentes instâncias e dispositivos estatais. Procuro compreender tanto a produção contínua do Estado “em ato”, privilegiando tanto as dinâmicas constitutivas dos modos de fazer da administração, quanto os modos de subjetivação que, a partir de uma série de constrangimentos conduzidos pelas formas específicas de gestão a que estão submetidos, são operacionalizados pelos sujeitos atendidos pela instância etnografada.
Pandemia, inequidad y protección social neoliberal. Chile, un caso paradigmático
Authors: Antognini Ana Farías , Trebilcock Maria Paz
Published: November 2021

El presente estudio tiene como objetivo analizar las políticas de protección social que se dispusieron en Chile para enfrentar la pandemia en el marco de una estructura de bienestar liberal. La protección social se ha visto fuertemente estresada por el impacto de la pandemia del COVID-19, haciendo frente a los graves problemas de desempleo y disminución de ingresos de las familias. El carácter de las medidas dispuestas para la emergencia depende de la estructura de bienestar que han construido los países, siendo Chile un caso paradigmático de régimen neoliberal. Las decisiones para combatir los impactos socioeconómicos han mantenido un carácter subsidiario con fuerte predominio del sector privado, con coberturas focalizadas donde la atención del Estado ha estado centrada especialmente en la población más vulnerable. Las características del reparto de las prestaciones sociales, no han logrado mayores niveles de equidad y cohesión social, sino que por el contrario alejan la posibilidad de proveer prestaciones de carácter universal al no incorporar componentes redistributivos y solidarios en la seguridad social. La continuidad en la estructura de bienestar neoliberal nos lleva a plantear que las políticas sociales, especialmente aquellas vinculadas a la protección social han visualizado y ensanchado las grandes brechas de inequidad en la población.
Repensar a América Latina na Guerra Fria como parte do Sul Global
Authors: Giorgini Flóres
Published: November 2021

Resenha do Livro: FIELD Jr, Thomas C.; KREPP, Stella; PETTINÀ Vanni (ed.). Latin America and the Global Cold War. The New Cold War history. Chapel Hill: The University of North Carolina Press, 2020, 440p.
Aula 01 (25.10.96) – Curso “Adorno e a Dialética Negativa”
Authors: Fausto Ruy , Bernardo Arthur Hussne
Published: November 2021

Aula ministrada na Université Paris-VIII. Transcrita e traduzida do francês ao português por Arthur Hussne Bernardo, que também incluiu notas de rodapé com as referências.
Times as Task, Not Timing: Reconsidering Qoheleth’s Catalogue of the Times
Authors: Peterson Jesse M.
Published: November 2021

This essay examines Qoheleth’s Catalogue of the Times poem in Eccl 3:2–8. I argue that the two most common scholarly interpretations of the poem’s overall meaning fail to sufficiently account for its literary context and that an underdeveloped alternative reading is to be preferred. When we read the poem in light of two other closely related passages, 1:4–11 and 3:9–15, it becomes clear that a poem ostensibly about “time” is much less concerned with “timing” than is typically thought, but instead signifies Qoheleth’s frustration with the inevitable equilibrating tendency embedded into every human task.
Lot’s Struggle for “Masculinity”: Use, Function, and Ideology of Masculinity in the Lot Stories
Authors: Winkler Mathias
Published: November 2021

Taking a look at Lot through the lens of Biblical Masculinity Studies, we see him constantly trying to meet ideals of a performance of hegemonic masculinity but failing to do so. This paper uncovers masculinity as the motor of the narrative in the Lot stories, especially in Gen 19. The stories make fun of Lot and his offspring, the Moabites and Ammonites, as “failed” men. This paper analyses how this is achieved by the authors. Masculinity and masculine traits are artistically and deliberately used as a highly idealised background foil in order to highlight Lot’s failure. Furthermore, the authors’ point of view is highly ideological. They are in a superior and dominant position from which they portray Lot and his masculinity. They do this from safe distance, since they themselves are not represented in the stories by a character.
He Who Pays the Piper Calls the Tune: Big Data, Philanthrocapitalism, and the Demise of the Historical Study of Religions
Authors: Ambasciano Leonardo
Published: November 2021

The recent digital turn has had an unprecedented impact on the identity of the academic disciplines that study religions. Expectedly, this shift has brought about a dramatic change in the power dynamics between the main research actors and funders. In particular, historians and humanist scholars have taken the brunt, mostly replaced by data scientists, software engineers, statisticians, psychologists, anthropologists, and biologists alike. Consequently, multimillion-dollar projects aimed at testing historical hypotheses and massive agent-based simulations have been implemented on shaky methodological and epistemological grounds. Concurrently, in the aftermath of the 2008 financial crisis, private religious bodies have increasingly replaced public funding, raising important but still unaddressed moral questions about transparency, independence, and potential conflicts of interests. The present article explores the ethically troubling relationship between the boom of Big Data and computational approaches to the study of religions past and present and the infiltration of religious philanthrocapitalism in contemporary neoliberal academia.
Mechanism, Occasionalism and Final Causes in Johann Christoph Sturm’s Physics
Authors: Henkel Christian
Published: November 2021

This paper argues that mechanism, occasionalism and finality (the acceptance of final causes) can be and were de facto integrated into a coherent system of natural philosophy by Johann Christoph Sturm (1635–1703). Previous scholarship has left the relation between these three elements understudied. According to Sturm, mechanism, occasionalism and finality can count as explanatorily useful elements of natural philosophy, and they might go some way to dealing with the problem of living beings. Occasionalism, in particular, serves a unifying ground: It will be shown that occasionalism can account for the problems of the source and transmission of motion that mechanism faces, while at the same time explaining the finality of non-rational living beings as designed by God.
COVID-19, Business, and Human Rights
Authors: Deva Surya
Published: November 2021

COVID-19 has affected the full range of human rights, though some rights holders have experienced a disproportionate impact. This has triggered debate about the respective obligations and responsibilities of states and business enterprises under international human rights law. Against this backdrop, this article examines critically whether the “protect, respect and remedy” framework operationalised by the UN Guiding Principles on Business and Human Rights is “fit for the purpose” to deal with the COVID-19 crisis. I argue that while the UNGPs’ framework provides a good starting point, it is inadequate to bring transformative changes to overcome deep-rooted socio-economic problems exposed by this pandemic. Realising human rights fully would not only require harnessing the potential of states’ tripartite obligations, but also move beyond limiting the responsibility of businesses to respect human rights.
Tooth Position and Deformation of Flexspline Assembled with Cam in Harmonic Drive Based on Force Analysis
Authors: Yao Yunpeng , Chen Xiaoxia , Xing Jingzhong , Shi Liteng , Wang Yuqi
Published: November 2021

Deformation of the flexspline is the basis of analyzing tooth trajectory and designing tooth profile. Considering the tooth influence on the position of equivalent neutral layer, a piecewise method for calculating the deformation of flexspline assembled with a cam wave generator is presented in this paper. Firstly, a mechanic model of a ring of uniform thickness in contact with a rigid cam is established. The displacements of the ring inside and outside an unknown wrapping angle are determined by the geometric constraints of the cam profile and the equilibrium relationship, respectively. Meanwhile, the wrapping angle is solved according to the boundary conditions. The assembly forces are derived to investigate the circumferential elongation and strain. Then, considering the tooth effects on the neutral layer of flexspline, the tooth is positioned on the equivalent neutral layer, which is the non-elongation layer within one gear pitch but offset from the geometric mid-layer. The equivalent neutral layer is positioned by the empirical formula of the offset ratio, which is summarized by the orthogonal simulation on finite element models of racks. Finally, finite element models of a ring-shaped and a cup-shaped flexspline assembled with elliptical cam are established to verify the effectiveness and accuracy of the piecewise method. The results show that, compared with the geometric method, the tooth positioning deviation calculated by the piecewise method can be reduced by about 70% with a more accurate deformation description from the geometric condition and mechanic condition inside and outside the wrapping angle.
Raising the Speed Limit of Axial Piston Pumps by Optimizing the Suction Duct
Authors: Fang Yu , Zhang Junhui , Xu Bing , Mao Zebing , Li Changming , Huang Changsheng , Lyu Fei , Guo Zhimin
Published: November 2021

The maximum delivery pressure and the maximum rotational speed determine the power density of axial piston pumps. However, increasing the speed beyond the limit always accompanies cavitation, leading to the decrease of the volumetric efficiency. The pressure loss in the suction duct is considered a significant reason for the cavitation. Therefore, this paper proposes a methodology to optimize the shape of the suction duct aiming at reducing the intensity of cavitation and increasing the speed limit. At first, a computational fluid dynamics (CFD) model based on the full cavitation model (FCM) is developed to simulate the fluid field of the axial piston pump and a test rig is set to validate the model. Then the topology optimization is conducted for obtaining the minimum pressure loss in the suction duct. Comparing the original suction duct with the optimized one in the simulation model, the pressure loss in the suction duct gets considerable reduction, which eases the cavitation intensity a lot. The simulation results prove that the speed limit can increase under several different inlet pressures.
Risk factors for the frequent attendance of older patients at community health service centers in China: a cross-sectional study based on stratified sampling
Authors: Li Nana , Shou Juan
Published: November 2021

Background

This study aimed to investigate the characteristics of frequent attenders (FAs) among older patients in Shanghai, China, and explore the associated factors.

Methods

This cross-sectional study was conducted in six community health service centers in Shanghai, China, from August to December 2018 based on stratified sampling. On the basis of our preliminary study, FAs were defined as those attending at least four consultations in a month. A self-administered questionnaire was used to collect the clinicodemographic data of the participants. Social support, pain severity, depression, and anxiety were evaluated using the Social Support Revalued Scale, six-point Behavioral Rating Scale, Patient Health Questionnaire–9, and Generalized Anxiety Disorder Scale, respectively.

Results

This study included 619 patients aged > 60 years. Among these patients, 155 (25%) were FAs to a community health service center, 366 (59.1%) had 1 or 2 chronic diseases, 179 (28.9%) had ≥3 chronic diseases, 313 (50.4%) opted for a family doctor service, and 537 (86.8%) chose a community health service center for the first consultation. The following were identified as independent risk factors for frequent attendance: widowed status, unmarried status, the presence of > 3 chronic diseases, first consultation at a community health service center, high medical expenses, frequent attendance of the spouses, long-term medication, the use of both traditional Chinese and Western medicine services, and depression.

Conclusions

This study summarizes the characteristics of older FAs to community health service centers in China and identifies 10 risk factors significantly associated with frequent attendance.