bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Investigation and Mold Optimization of the Automobile Coat Rack Compression Molding
Authors: Wang Youmin , Li Xiangli , Sui He
Published: April 2021

In order to have more accurate control over the compression molding of automobile coat rack, improve the quality of molding products, and achieve the goal of lightweight design, a novel mechanical model for the main two‐layer composite structure of the coat rack is proposed. In this regard, the main factors affecting the mechanical properties of the composite structure are obtained. The hot air convection is selected for the sheet preheating. During the experiment, the hot air temperature, preheating time, molding pressure, and pressing holding time are set to 250°C, 110 s, 13 MPa, and 80 s, respectively. Moreover, the error compensation method is applied to compensate for the shrinkage of the product during solidification and cooling. The LS‐DYNA finite element software is used to simulate the molding process of the main body of the coat rack, and the node force information with large deformation is obtained accordingly. The load mapping is used as the boundary condition of mold topology optimization, and the compression molding of the main body of the coat rack is optimized. A lightweight design process and method for the compression molding of automotive interior parts and a mathematical model for the optimization of the solid isotropic material penalty (SIMP) (power law) material interpolation of the concave and convex molds are established. Based on the variable density method, OptiStruct is used for the lightweight design of the convex and concave molds of the main body of the coat rack, which reduces the mold weight by 15.6% and meets the requirements of production quality and lightweight.
Micro- and Nanoscale Pore Structure Characterization of Carbonates from the Xiaoerbulake Formation in the Tarim Basin, Northwest China
Authors: Wang Jingyi , Hu Qinhong , Sun Mengdi , Cai Zhongxian , Zhang Cong , Zhang Tao
Published: April 2021

The evaluation of pore structure is an essential part in the assessment of carbonate reservoirs. The structures (geometry and connectivity) of nm to μm-scale pore networks in outcrop samples of carbonates from Xiaoerbulake Formation in Tarim Basin of China were studied by using optical microscopy, field emission-scanning electron microscopy (FE-SEM), as well as mercury intrusion porosimetry (MIP) with fractal analyses of the data, and spontaneous imbibition tests (distilled water). The results demonstrate that the lithologies are micritic dolomites, fine-to-medium-to-coarse crystalline dolomites, microbial dolomites, and dolarenite. At micro- to nanoscales in size, pore types are dominated by intergranular, intercrystalline, and intragranular (e.g., dissolution) pores. These pore networks have pore-throat diameters from 0.01 to >10 μm. Compared with a nanoscale pore network, the μm-scale pore networks are relatively well connected and serve as the most important permeability pathways. Although the pore volume accounts for most of the total porosity, the permeability of nanoscale pore networks is low. The existence of micro-nano-fractures could improve connectivity, especially for the nanoscale pore networks, by linking the intragranular (dissolution) pores which are mostly in the range of nm-scale.
The Architectural Surfaces Characteristics of Sandy Braided River Reservoirs, Case Study in Gudong Oil Field, China
Authors: Wang Xixin , Zhang Fan , Li Shaohua , Dou Luxing , Liu Yuming , Ren Xiaoxu , Chen Depo , Zhao Wen
Published: April 2021

The architecture analysis of the different orders sedimentary bodies is of great significance to the efficient development of oil and gas fields. In order to investigate the effects of the architectural interfaces on reservoir quality and heterogeneity, this study takes the Gudong oil field as a case to investigate the architectural characteristics of hierarchical bounding surfaces using detailed descriptions of core and wireline logs. Architectural models from the 7th-order to the 3rd-order are analyzed, and the developmental characteristics of the 5th-order braided river, 4th-order single sandstone, and 3rd-order accretion are summarized. The interlayer between two braided rivers is floodplain mud deposition, with poor physical properties, stable thickness, and strong blocking capacity. Two models of interlayers are found in the 4th-order deposition. The first interlayer is between the braided filling channel and midchannel bar, which is composed of generally fine-grained sediments with calcium cementation and poor physical properties. The second interlayer is a transformation belt between two midchannel bars and is generally composed of gravel-scoured deposition with penetration capability. The 3rd-order surfaces are defined as the surfaces of accretions within midchannel bars. Two models of interlayers are also found in the 3rd-order surfaces of accretions. The paleocurrent of the sandy braided river is reconstructed by synthesizing the core data, well logging data, and production performance data. A total of 1 fluvial system (7th-order), 2 compound braided rivers (6th-order), 11 braided rivers (5th-order), 41 midchannel bars (4th-order), and 96 accretions (3rd-order) are developed in the study area.
Expression Profile of Long Noncoding RNAs and Circular RNAs in Mouse C3H10T1/2 Mesenchymal Stem Cells Undergoing Myogenic and Cardiomyogenic Differentiation
Authors: Li Mingshan , Pei Zijie , Zhang Hongtao , Qu Jing
Published: April 2021

Background. Currently, a heterogeneous category of noncoding RNAs (ncRNA) that directly regulate the expression or function of protein-coding genes is shown to have an effect on the fate decision of stem cells. However, the detailed regulatory roles of ncRNAs in myogenic and cardiomyogenic differentiation of mouse C3H10T1/2 mesenchymal stem cells (MSCs) are far from clear. Methods. In this study, 5-azacytidine- (5-AZA-) treated C3H10T1/2 cells were differentiated into myocyte-like and cardiomyocyte-like cells. Next, ncRNA associated with myogenic and cardiomyogenic differentiation was identified using high-throughput RNA sequencing (RNA-seq) data. Bioinformatics analysis was conducted to identify the differentially expressed ncRNAs and the related signaling pathways. Results. Myotube-like structure was formed after 5-AZA treatment of C3H10T1/2 cells. In addition, myogenic and cardiomyogenic differentiation-related genes like GATA4, cTnt, MyoD, and Desmin were upregulated significantly after the 5-AZA treatment. Totally, 1538 differentially expressed lncRNAs and 3398 differentially expressed mRNAs were identified, including 1175 upregulated and 363 downregulated lncRNAs and 2429 upregulated and 969 downregulated mRNAs. In addition, 46 differentially expressed circRNAs were identified, including 25 upregulated and 21 downregulated circRNAs. Moreover, the differentially expressed mRNAs were enriched into 5 significant pathways, including those for focal adhesion, ECM-receptor interaction, PI3K-AKT signaling pathway, PPAR signaling pathway, and Tyrosine metabolism. Conclusions. A systematic view of the expression of ncRNAs in myogenic and cardiomyogenic differentiation of MSCs was provided in the study.
Synthesis, Antibacterial, Antioxidant, and Molecular Modeling Studies of Novel [2,3′-Biquinoline]-4-Carboxylic Acid and Quinoline-3-Carbaldehyde Analogs
Authors: Digafie Zeleke , Melaku Yadessa , Belay Zerihun , Eswaramoorthy Rajalakshmanan
Published: April 2021

Currently, it has been common to see people being affected and dying from untreatable infections caused by multidrug-resistant (MDR) germs. To tackle this problem, developing new effective chemotropic agents is urgently needed. Hence, this project aims to design, synthesize, and evaluate their antibacterial and antioxidant activities of new series of [2,3′-biquinoline]-4-carboxylic acid and quinoline-3-carbaldehyde analogs. The molecular docking analysis of the compounds against E. coli DNA gyrase was computed to investigate the binding mode of the compounds within the active site of the enzyme. In this regard, a new series of [2,3′-biquinoline]-4-carboxylic acid and quinoline-3-carbaldehyde analogs were synthesized by utilization of Vilsmeier–Haack, Doebner, nucleophilic substitution, and hydrolysis reactions. The structures of the synthesized compounds were determined using UV-Vis, FT-IR, and NMR. The synthesized compounds were screened for their antibacterial activity against four bacterial strains using disc diffusion methods. The findings of the study revealed that seven of synthetic compounds possess good antibacterial activity compared to ciprofloxacin which was used as a positive control in the experiment. Among them, compounds 4, 9, and 10 displayed the highest mean inhibition zone of 13.7 ± 0.58, 16.0 ± 1.7, and 20.7 ± 1.5 mm, respectively, at 0.1 μg/μL. The radical scavenging property of these compounds was evaluated using DPPH radical assay where compounds 9 and 20 showed the strongest activity with IC50 values of 1.25 and 1.75 μg/mL, respectively. At the same concentration, the IC50 value of ascorbic acid was 4.5 μg/mL. The synthesized compounds were also assessed for their in silico molecular docking analysis. Compounds 4 (−6.9 kcal/mol), 9 (−6.9 kcal/mol), and 10 (−7.9 kcal/mol) showed the maximum binding affinity close to ciprofloxacin (−7.2 kcal/mol) used as a positive control. Thus, compounds 4, 9, and 10 showed the best antibacterial activities in both in vitro and molecular docking analyses among the synthetic compounds. The results of in silico molecular docking evaluation of the synthetic compounds against E. coli DNA gyrase B were in good agreement with the in vitro antibacterial analysis. Therefore, the antibacterial activity displayed by these compounds is encouraging for further investigation to improve the activities of [2,3′-biquinoline]-4-carboxylic acid by incorporating various bioisosteric groups in either of the quinoline rings.
The Unique Penile Morphology of the Short-Beaked Echidna, Tachyglossus aculeatus
Authors: Fenelon Jane C. , McElrea Caleb , Shaw Geoff , Evans Alistair R. , Pyne Michael , Johnston Stephen D. , Renfree Marilyn B.
Published: April 2021

Monotremes diverged from therian mammal ancestors approximately 184 million years ago and have a number of novel reproductive characteristics. One in particular is their penile morphology. There are differences between echidna and platypus phalluses, but both are somewhat similar in structure to the reptilian phallus. The echidna penis consists of 4 rosette glans, each of which contains a termination of the quadrifurcate urethra, but it appears that only 2 of the 4 glans become erect at any one time. Despite this, only a few historical references describe the structure of the echidna penis and none provides an explanation for the mechanisms of unilateral ejaculation. This study confirmed that the echidna penis contains many of the same overall structures and morphology as other mammalian penises and a number of features homologous with reptiles. The corpus cavernosum is well supplied with blood, extends up to the base of the glans penis and is primarily responsible for erection. However, the echidna possesses 2 distinct corpora spongiosa separated by a septum, each of which surround the urethra only distal to the initial urethral bifurcation in the glans penis. Together with the bifurcation of the main penile artery, this provides a mechanism by which blood flow could be directed to only one corpus spongiosum at a time to maintain an open urethra that supplies 2 of the 4 glans to facilitate unilateral ejaculation.
Association of Noise Annoyance with Measured Renal Hemodynamic Changes
Authors: Kannenkeril Dennis , Jung Susanne , Ott Christian , Striepe Kristina , Kolwelter Julie , Schmieder Roland E. , Bosch Agnes
Published: April 2021

Background: Chronic mental stress is recognized as a modifiable risk factor for cardiovascular disease. The aim of this study was to demonstrate that noise annoyance-induced stress is associated with changes in renal hemodynamics. Methods: Renal hemodynamic parameters were measured using steady-state input clearance with infusion of para-aminohippuric acid and inulin in individuals with normal, high normal, and elevated blood pressure. All individuals ranked subjective annoyance due to noise in everyday life on a 7-grade Likert scale. The median of all rankings was used as a cutoff point to divide the group into noise-annoyed and non-noise-annoyed individuals. Different renal hemodynamic parameters were calculated based on the Gomez equation. Results: Noise-annoyed individuals (n = 58) showed lower renal plasma flow (599 ± 106 vs. 663 ± 124 mL/min, p = 0.009), lower renal blood flow (1,068 ± 203 vs. 1,172 ± 225 mL/min, p = 0.047), higher filtration fraction (22.7 ± 3.3 vs. 21.3 ± 3.0, p = 0.012), higher renal vascular resistance (88.9 ± 25.6 vs. 75.8 ± 22.9 mm Hg/[mL/min], p = 0.002), and higher resistance of afferent arteriole (2,439.5 ± 1,253.4 vs. 1,849.9 ± 1,242.0 dyn s−1 cm−5, p = 0.001) compared to non-noise-annoyed individuals (n = 55). There was no difference in measured glomerular filtration rate (133 ± 11.8 vs. 138 ± 15 mL/min, p = 0.181), resistance of efferent arteriole (2,419.4 ± 472.2 vs. 2,245.8 ± 370.3 dyn s−1 cm−5, p = 0.060), and intraglomerular pressure (64.0 ± 3.1 vs. 64.6 ± 3.5 mm Hg, p = 0.298) between the groups. After adjusting for age, renal plasma flow, renal blood flow, and renal vascular resistance remained significantly different between the groups, with a trend in increased afferent arteriolar resistance and filtration fraction. Conclusion: In this study, noise annoyance was associated with reduced renal perfusion attributed to increased renal vascular resistance predominantly at the afferent site. Long-term consequences of this renal hemodynamic pattern due to noise annoyance need to be investigated.
Caracterización de las víctimas y de la violencia sexual cometida por adolescentes
Authors: Pedroso Bastos Kárita Rachel , Costa Liana Fortunato
Published: April 2021

(analítico)La violencia sexual es un problema multifacético de salud pública, cada vez más cometido por adolescentes. Este artículo analiza las principales características de las víctimas y el contexto de violencia sexual practicada por adolescentes en una región de Brasil. Para esto, se realizó una investigación documental en 254 procedimientos judiciales, en los que se identificaron 291 víctimas. Utilizando estadísticas descriptivas, se identificó que las víctimas eran predominantementemujeres, de edades entre los 10 y 14 años, que viven con el ofensor, cuyo delito ocurrió especialmente en el hogar del adolescente o la víctima. El conocimiento de tales características contribuye a la planificación de intervenciones preventivas. El desempeño de diversas políticas públicas y la participación de las familias son primordiales para las intervenciones y el tratamiento de las víctimas.
Palabras clave: Adolescente, violencia sexual, familia.
Ausencia paterna en la infancia: vivencias en personas con enfermedad mental
Authors: Rendón-Quintero Eduardo , Rodríguez-Gómez Rodolfo
Published: April 2021

(analítico)El objetivo del estudio consistió en comprender los fenómenos que emergen de la experiencia de la ausencia paterna durante la infancia del adulto con diagnóstico de enfermedad mental. La investigación se desarrolló mediante el análisis cualitativo de las narrativas recogidas en ocho entrevistas semiestructuradas; estas se realizaron a cuatro mujeres y cuatro hombres. Se expusieron los resultados según las seis categorías que emergieron del análisis: universo de la ausencia, miedo e incertidumbre, representación e idealización del padre, tristeza y soledad, estigma y diferencia e ícono del sustituto. Según los hallazgos, la ausencia del padre en la infancia de personas con enfermedad mental origina sentimientos y cogniciones de depresión, estigmatización, soledad y desprotección; estas se asocian a vivencias dolorosas e invitan a profundizar en su comprensión y abordaje terapéutico.
Palabras clave: Relación padre-hijo, paternidad, privación paterna, investigación cualitativa, trastorno mental.
Reframing Landscape
Authors: Mitchell W. J. T.
Published: April 2021

“Reframing Landscape” explores three distinct landscapes that have been decisively impacted by conquest and colonization, reframed by three artistic interventions: painting, photography, and sculpture. August Earle shows us the de-forested landscape of 19th century New Zealand, still guarded by a Maori totem; Miki Kratsman photographs a wall mural in occupied Palestine that erases the presence of indigeneous people; and Antony Gormley anticipates the clearing of Manhattan by a pandemic in whirlwind of metal. Real spaces and places are converted into landscapes of attention into what has been lost and what is to come.
Cross-Context News Corpus for Protest Event-Related Knowledge Base
Construction
Authors: Hürriyetoğlu Ali , Yörük Erdem , Mutlu Osman , Duruşan Fırat , Yoltar Çağrı , Yüret Deniz , Gürel Burak
Published: April 2021

We describe a gold standard corpus of protest events that comprise various local and international English language sources from various countries. The corpus contains document-, sentence-, and token-level annotations. This corpus facilitates creating machine learning models that automatically classify news articles and extract protest event-related information, constructing knowledge bases that enable comparative social and political science studies. For each news source, the annotation starts with random samples of news articles and continues with samples drawn using active learning. Each batch of samples is annotated by two social and political scientists, adjudicated by an annotation supervisor, and improved by identifying annotation errors semi-automatically. We found that the corpus possesses the variety and quality that are necessary to develop and benchmark text classification and event extraction systems in a cross-context setting, contributing to the generalizability and robustness of automated text processing systems. This corpus and the reported results will establish a common foundation in automated protest event collection studies, which is currently lacking in the literature.
The Effect of Bonuses on Teacher Retention and Student Learning in
Rural Schools: A Story of Spillovers
Authors: Castro Juan F. , Esposito Bruno
Published: April 2021

We estimate the direct and indirect effects of recruitment bonuses paid to teachers working in rural schools in Peru on their retention and student learning. This is the first study to estimate the indirect effects of a bonus aimed at attracting teachers to disadvantaged schools. This is important for assessing whether the incentive has improved the distribution of teaching resources and for estimating the direct effect without bias. We exploit the exogenous variation produced in the size of the bonus by the rule used to classify rural schools, and allow ineligible schools to be affected if they have an eligible school nearby. We find the bonus produces positive direct effects on teacher retention but also a negative spillover on the probability of filling teacher vacancies in neighboring schools. This spillover indicates that the bonus is redistributing resources between equally disadvantaged schools. We also find that the bonus has no direct effects on student learning and produces a positive spillover on the scores of students in neighboring schools. We argue these results are due to the poor pedagogical skills of the teachers being mobilized by the scheme. A reasonable policy alternative is a scheme that targets talented teachers with larger bonuses.
The Effects of Campus Shootings on School Finance and Student Composition
Authors: Yang Lang (Kate) , Gopalan Maithreyi
Published: April 2021

Between 1999 and 2018, 210 shootings have occurred on public school campuses in the United States. The increased need for security and student support may crowd out instructional resources post-shooting. Shootings may also cause students, especially those from socioeconomically advantaged backgrounds, to move away, leading to declines in enrollment. Both changes in the budget allocation and the student composition could exert a negative impact on achievement. First, we examine the effects of campus shootings on public school districts’ revenue, expenditure, debt, and staffing using a long panel of district-year data. Results from event study and difference-in-differences analyses indicate that shootings increase per-pupil spending by $248, which is funded primarily through increased federal transfers. Most spending increases occur in noninstructional functions, such as pupil support services, and capital projects, but they do not crowd out instructional spending. Using school-level data, we show that shootings are followed by a decline in enrollment, driven almost exclusively by reductions in students who do not receive free or reduced-price lunch. Private schools in the area also experience enrollment drop. In sum, despite the increased intergovernmental transfers, campus shootings reduce the desirability of the community and lead to the exit of relatively well-off families.
Coulteria lewisiae (Leguminosae: Caesalpinioideae) a new species for Infiernillo region, Mexico
Authors: SOTUYO SOLANGE , CONTRERAS-JIMÉNEZ JOSÉ LUIS
Published: April 2021

A new Coulteria species from the seasonally dry forest of Infiernillo region, México is described and illustrated.  Coulteria lewisiae, has young leaves sericeous that changes to adpresse tomentose when mature, flowers of 2 cm length (notable in the genus), and a glabrous fruit.
Second finding, first complete specimen and range extension of the rare alpheid shrimp Bermudacaris britayevi Anker, Poddoubtchenko & Marin, 2006 (Caridea: Alpheidae)
Authors: ANKER ARTHUR
Published: April 2021

The very uncommon alpheid shrimp Bermudacaris britayevi Anker, Poddoubtchenko & Marin, 2006, previously known only from the incomplete holotype from Nha Trang Bay, Vietnam, is recorded from Guam, Mariana Islands, extending its previously known distribution range into the oceanic islands of the western Pacific. The single specimen from Guam, an ovigerous female, was collected adjacent to a near-shore coral reef, on fine sand under a large piece of coral rubble, at a depth of about 10 m. This habitat is different from the collection data of the holotype, which was extracted from a burrow of unknown host on an intertidal sand-mud flat close to mangroves. Despite these ecological differences, the specimen from Guam corresponds to the holotype of B. britayevi in all diagnostic morphological characters and can be distinguished from the closely related B. australiensis Anker & Komai, 2004 and B. harti Anker & Iliffe, 2000. Since the holotype of B. britayevi was lacking one of the chelipeds, the complete specimen from Guam enables to complement the original description of the species. The stouter (= major) cheliped of the Guam specimen is illustrated to show a marked difference in the armature of the cheliped fingers, between the left and right cheliped. The colour pattern of B. britayevi, which was superficially described in the original description, is herein illustrated by photographs of the living individual. The relatively low number and large size of eggs in the Guam specimen of B. britayevi suggests an abbreviated larval development in this species.
It’s Okay to Change Your Mind: You Do Not Need to Vote the Same Way Twice
Authors: Levine Kenneth J.
Published: April 2021

Voters make their decisions based on several factors; however, cognitive dissonance and ego-involvement are two forces that work to keep voters’ choices consistent over time. Despite these internal pressures, there are times when a particular candidate has disappointed a voter to such an extent that the voter considers voting for a different candidate in the next election. 170 young voters were asked about their feelings of regret and their need for permission to change their minds and vote differently in a future election. Findings suggest that women and Democrats are more likely to need permission to change their votes than men and Republicans. Furthermore, there is a significant relationship between regret and desire to change one’s vote with the need for permission to do so on election day. Lastly, the importance of having that permission will affect a voter’s feelings of obligation to cast a ballot for the same party. Open ended responses explore the idea of obligation versus making a change in more detail. Findings suggest that correct messaging about the ability one has to change one’s mind and also being granted permission to vote differently may be an effective campaign messaging strategy.
Project-based learning in a graduate course on home appliance engineering
Authors: Kim Yeon , Lee Suk , Ahn Changsun
Published: April 2021

Project-based learning is one of the popular and promising approaches in engineering education. The current study reports on a curriculum that was designed and implemented by a graduate school to help students gain knowledge and creative thinking skills through collaboration between different majors during industrial projects in a graduate course on home appliance engineering. The students selected the topics, planned the project, conducted research, produced a prototype, and presented their results under the guidance of a group of advisors consisting of professors, technical advisors, and industry mentors. A quantitative analysis showed that this approach was effective in improving the students’ attitude toward engineering. Furthermore, a qualitative analysis showed that this learning method helped students learn how to communicate and present effectively, to flexibly approach projects, and to understand the practices of industrial research. Based on the findings, the current study discusses how the project-based learning helped students advance.
Changing Trends of Consanguineous Marriages in South India
Authors: Sahoo Harihar , Debnath Paramita , Mandal Chaitali , Nagarajan R. , Appunni Sathiyasusuman
Published: April 2021

Consanguineous marriage is still a preferred option in many societies of southern India. Therefore, this study addresses the state and district wise variation in consanguineous marriages and also attempts to find out the underlying factors of this practice in different marriage cohorts of South India. Drawing data from National Family Health Survey-4, the result revealed that there is a reduction in consanguineous marriages from 32.6% who married before 1985 to 23% during 2010–2014. About 13 districts in Tamil Nadu had the highest prevalence of consanguineous marriages, indicating that recent socio-demographic changes such as delays in age at marriages, lesser age gaps between partners, increase in the level of education, etc., did not explicitly affect the consanguineous marriages.
Analysis of reinforcement efficiency and microscopic characterization of glass and carbon roving geometry in prestressed concrete composites
Authors: Haas Richard , Quadflieg Till , Stolyarov Oleg
Published: April 2021

In this work, the reinforcement efficiency of concrete composites prestressed with glass and carbon rovings was studied. Prestressed concrete composites samples were prepared at a prestress level one-third the maximum tensile strength of the roving. The flexural properties of the manufactured composites were determined using a four-point bending test. Additionally, changes in the cross-sectional shape of the reinforcing rovings in the initial and prestressed states were analyzed using CT scanning and optical microscopy. The results showed that prestressing significantly affected the flexural properties of the concrete composites. Thus, the limit of proportionality increased by 1.26 and 1.85 for a composite reinforced with glass and carbon roving, respectively. The maximum flexural strength increased by approximately 1.2 times for both reinforcing rovings. The change in the cross-sectional shape of the reinforcing roving during prestressing enhances the efficiency of prestressed concrete composites.
Numerical simulation study on gas drainage by interval hydraulic flushing in coal seam working face
Authors: Xie Shengrong , Cui Junqi , Chen Dongdong , Chen Ping
Published: April 2021

In order to solve the problem of difficult gas extraction in coal mine, a method of gas extraction from coal seam by interval hydraulic flushing is put forward. Based on the coal seam gas occurrence conditions of 7609 working face in Wuyang Coal Mine, the numerical simulation research on gas drainage by ordinary drilling and hydraulic flushing drilling was carried out by using COMSOL numerical simulation software. The results show that with the increase of hydraulic flushing coal quantity, the effective gas drainage radius also increases. The effective extraction radius of ordinary drilling is 0.5 m, and the effective extraction radius is 1.0 m, 1.2 m and 1.3 m respectively when the coal flushing quantity is 0.5t/m, 1.0t/m and 1.5t/m. As multiple boreholes are drained at the same time, the boreholes will affect each other, which will reduce the gas pressure and increase the effective drainage radius, the spacing between boreholes can be greater than twice the effective drainage radius of a single borehole when arranging boreholes. And the smaller the flushing interval, the more uniform the gas pressure reduction area. According to the numerical simulation results, the ordinary drilling and 1.0t/m interval hydraulic flushing test were carried out in the field. Through observation and analysis, the gas concentration of the interval hydraulic flushing drilling module was increased by 31.2% and the drainage purity was increased by 5.77 times compared with the ordinary drilling module. It shows that the interval hydraulic flushing drilling can effectively improve the gas drainage effect.
Cardiac calcified amorphous tumor with sustained ventricular tachycardia
Authors: Yamana Fumio , Domae Keitaro , Shirakawa Yukitoshi , Takahashi Toshiki , Hao Hiroyuki
Published: April 2021

Cardiac calcified amorphous tumors are rare non-neoplastic intracavitary masses with unknown cause. A 60-year-old man presented with sustained ventricular tachycardia. Transthoracic echocardiography and contrast-enhanced angio-computed tomography demonstrated an expanding 73 × 40 mm sized calcified mass in the left ventricle. He underwent successful total removal of the mass and cryo-ablation at the normal myocardial border. Histopathological examination confirmed a diagnosis of cardiac calcified amorphous tumors. The postoperative course was uneventful, without ventricular tachycardia recurrence. To our knowledge, this is the first reported case of confirmed cardiac calcified amorphous tumors causing ventricular tachycardia and treated by surgical resection combined with cryo-ablation.
Paraneoplastic immunoglobulin A nephropathy in a patient with lung adenocarcinoma: A case report and literature review
Authors: Wang Jing , Liu Yang , Liu Nian , Gao Menghan , Yuan Hang
Published: April 2021

Immunoglobulin A nephropathy (lgAN) is a common primary glomerulonephritis, but paraneoplastic IgAN has been rarely reported. This current case report describes a 49-year-old male patient that was referred with proteinuria, oedema and hypoproteinaemia after lung cancer surgery and before the first cycle of chemotherapy. Renal biopsy confirmed lgAN. The patient received four cycles of chemotherapy (first cycle: pemetrexed + nedaplatin; second to fourth cycle: pemetrexed + carboplatin). The symptoms of IgAN were gradually relieved with additional cycles of chemotherapy. At the latest follow-up on 10 February 2020, there was no evidence of lung cancer recurrence and all symptoms of lgAN had disappeared. lgAN combined with lung adenocarcinoma is quite rare, which suggests that IgAN might be a paraneoplastic manifestation of lung adenocarcinoma.
Racialized geographies of housing financialization
Authors: Fields Desiree , Raymond Elora Lee
Published: April 2021

Financial violence is racial violence: geographies of housing financialization spatialize hierarchies of death-dealing racial difference. However, research concerned with housing financialization rarely addresses the inextricable relationship between racism and capitalism. Racial division and subordination have always been necessary to producing value in real estate; financialization materially reproduces racial capitalism by reconfiguring the death-dealing abstraction of racism from systems of individual bias and racialized bodies into automated systems. Rather than reducing racially subordinated communities to experiences of oppression and domination, producing life-giving geographies of housing requires bringing collective resistance for emancipatory social change into the analytic frame.
Capacity assessment and implementation analysis of common treatment facility for the management of infectious healthcare waste in rapidly urbanising city of Nepal
Authors: Pathak Dhundi Raj , Nepal Suvash , Thapa Tejendra , Dhakal Nimesh , Tiwari Pravin , Sinha Tirtha Kumar
Published: April 2021

This study is one of the first systematic attempts to examine the possibility of a common treatment facility (CTF) to treat infectious healthcare waste (HCW) in Nepal. First, the survey was conducted in 14 healthcare facilities (HFs) ranging from health posts to large hospitals selected from 120 total HFs in Nepalgunj sub-metropolitan city (SMC), a rapidly urbanising city of Nepal to investigate the current practices of HCW management (HCWM) and to estimate the waste generation and characteristics in the different HFs. The result shows that the average unit waste generation rate for health posts, clinics, urban health centres, and hospitals was estimated at 1.397 kg day−1, 1.608 kg day−1, 0.178 kg day−1 and 1.818 kg bed−1 day−1, respectively. Of the total 1242 kg day−1 HCW generated in Nepalgunj SMC, 73% is infected in the current situation, but if fully sorted at source, only 32% of the waste will be infected. Based on these HCW generation data and fraction of infectious waste, including waste management practices, three different scenarios are proposed for the capacity assessment and designing implementation modality of the CTF to treat infectious waste from all HFs of Nepalgunj SMC as a case study where an integrated solid waste management facility including material recovery facility and sanitary landfill site for municipal solid waste management is already in operation. The different implementation analyses are discussed, and the best implementation arrangement has been recommended for the sustainability of the project. This approach can be replicated in other cities alone or regions with many neighbouring cities of Nepal and explores a workable solution for HCWM in the rapidly urbanising cities of developing countries to help them improve their condition.
Skilled Nursing Facilities Modify the Relationship Between Depressive Symptoms and Hospital Readmissions but Not Health Outcomes Among Older Adults
Authors: Abrams Leah R. , Hoffman Geoffrey J.
Published: April 2021

Objectives: Despite detrimental effects of depressive symptoms on self-care and health, hospital discharge practices and the benefits of different discharge settings are poorly understood in the context of depression. Methods: This retrospective cohort study comprised 23,485 hospitalizations from Medicare claims linked to the Health and Retirement Study (2000–2014). Results: Respondents with depressive symptoms were no more likely to be referred to home health, whereas the probability of discharge to skilled nursing facilities (SNFs) went up a half percentage point with each increasing symptom, even after adjusting for family support and health. Rehabilitation in SNFs, compared to routine discharges home, reduced the positive association between depressive symptoms and 30-day hospital readmissions (OR = 0.95, p = 0.029) but did not prevent 30-day falls, 1-year falls, or 1-year mortality associated with depressive symptoms. Discussion: Depressive symptoms were associated with discharges to SNFs, but SNFs do not appear to address depressive symptoms to enhance functioning and survival.
Gastrointestinal Disease–Specific Survivorship Care: A New Personalized Model Integrating Onco-Wellness
Authors: Hutchinson Tai , Hoffe Sarah , Saeed Sabrina , Pflanzer Sonya A. , Fleming Jason B. , Pabbathi Smitha
Published: April 2021

Although the number of gastrointestinal (GI) cancer survivors is projected to increase in the coming years, there are currently no survivorship care models that address the specific and growing needs of this population. Current survivorship care models were evaluated to assess their suitability for GI cancer survivors. A survivorship care model based on foundational wellness principles is under development to address the specific needs of GI cancer survivors. This model delivers a cohesive and collaborative care continuum for survivors of different GI malignancies. Oncology providers in GI departments and internal medicine providers in survivorship programs are positioned to provide a comprehensive approach for the care of patients treated with curative intent. Survivorship care is introduced at the conclusion of active treatment in the form of an Onco-wellness consultation, an in-person or telemedicine comprehensive care plan creation and review by our Survivorship Program. Personalized care plan including long term and late effects of treatment, nutrition, physical activity and rehabilitation recommendations, prevention of secondary malignancies and psychosocial needs are reviewed. As patients transition from active treatment to survivorship within the GI Program, the GI Advance Practice Professionals (APPs) are well-positioned to deliver comprehensive survivorship care specific to the GI patient’s needs while integrating recommendations and principles from the Onco-wellness consultation. With projected shortages of both oncology and primary care physicians, such an APP-based model has the potential to bridge gaps in the survivorship care continuum and mutually benefit patients and physicians.
Knowledge, Attitude, and Practice on Cervical Cancer and Screening Among Women in India: A Review
Authors: Taneja Neha , Chawla Bhavika , Awasthi Aanchal Anant , Shrivastav Kumar Dron , Jaggi Vinita Kumar , Janardhanan Rajiv
Published: April 2021

Background:

Cervical Cancer is the second most common cancer among women in the world leading to 90% deaths in low and middle income countries. About 96,922 new Cervical Cancer cases are diagnosed annually in India.

Objective:

To study the knowledge, attitude and practice on Cervical Cancer and screening among women in India.

Materials and Methods:

Health sciences electronic databases PubMed and Google Scholar were searched for studies published between 2012 to March 2020. Keywords used for the search were (“Cervical Cancer screening”), (“knowledge”),(“attitude”), (“practice”) AND (“India”). 19 articles were included in the review based on the eligibility criteria. Statistical software SPSS-V.23 was used for the statistical application.

Results:

7688 women were included in the study. Age of study participants ranged from 12-65 years. Overall knowledge on Cervical Cancer among women was 40.22%. Knowledge of risk factors and signs and symptoms was fairly adequate among the women. 32.68% of women knew that early age of marriage was a risk factor for Cervical Cancer followed by 23.01% women who mentioned that early age of initiation of sexual activity was a common risk factor for Cervical Cancer. Inter menstrual bleeding and foul smelling discharge was the most common sign and symptom reported in 30.75% and 28.86% women respectively. Knowledge, attitude and practice regarding Cervical Cancer screening was seen in 20.31%, 43.64% and 13.22% of women respectively.

Conclusion:

Effective information, education and communication strategies are required to improve the level of awareness of women on Cervical Cancer.
Factors Explaining Socio-Economic Inequalities in Cancer Survival: A Systematic Review
Authors: Afshar Nina , English Dallas R. , Milne Roger L.
Published: April 2021

Background:

There is strong and well-documented evidence that socio-economic inequality in cancer survival exists within and between countries, but the underlying causes of these differences are not well understood.

Methods:

We systematically searched the Ovid Medline, EMBASE, and CINAHL databases up to 31 May 2020. Observational studies exploring pathways by which socio-economic position (SEP) might causally influence cancer survival were included.

Results:

We found 74 eligible articles published between 2005 and 2020. Cancer stage, other tumor characteristics, health-related lifestyle behaviors, co-morbidities and treatment were reported as key contributing factors, although the potential mediating effect of these factors varied across cancer sites. For common cancers such as breast and prostate cancer, stage of disease was generally cited as the primary explanatory factor, while co-morbid conditions and treatment were also reported to contribute to lower survival for more disadvantaged cases. In contrast, for colorectal cancer, most studies found that stage did not explain the observed differences in survival by SEP. For lung cancer, inequalities in survival appear to be partly explained by receipt of treatment and co-morbidities.

Conclusions:

Most studies compared regression models with and without adjusting for potential mediators; this method has several limitations in the presence of multiple mediators that could result in biased estimates of mediating effects and invalid conclusions. It is therefore essential that future studies apply modern methods of causal mediation analysis to accurately estimate the contribution of potential explanatory factors for these inequalities, which may translate into effective interventions to improve survival for disadvantaged cancer patients.
Post-buckling of an elastic half-space coated by double layers
Authors: Zhou Mingtao , Cai Zongxi , Fu Yibin
Published: April 2021

We investigate the buckling and post-buckling properties of a hyperelastic half-space coated by two hyperelastic layers when the composite structure is subjected to a uniaxial compression. In the case of a half-space coated with a single layer, it is known that when the shear modulus [Formula: see text] of the layer is larger than the shear modulus [Formula: see text] of the half-space, a linear analysis predicts the existence of a critical stretch and wave number, whereas a weakly nonlinear analysis predicts the existence of a threshold value of the modulus ratio [Formula: see text] below which the buckling is super-critical and above which the buckling is sub-critical. It is shown that when another layer is added, a larger variety of behaviour can be observed. For instance, buckling can occur at a preferred wavenumber super-critically even if both layers are softer than the half-space although the top layer would need to be harder than the bottom layer. When the shear modulus of the bottom layer lies in a certain interval, the super-critical to sub-critical transition can happen a number of times as the shear modulus of the top layer is increased gradually. Thus, an extra layer imparts more flexibility in producing wrinkling patterns with desired properties, and our weakly nonlinear analysis provides a road map on the parameter regimes where this can be achieved.
Health Science Students’ Use of Social Media for Educational Purposes: A Sample from a Medical University in Hanoi, Vietnam
Authors: Bich Diep Pham , Minh Phuong Vu , Van Chinh Nguyen , Thi Hong Diem Nguyen , Bao Giang Kim
Published: April 2021

Background:

Using social media (SM) for educational purposes might improve academic performance.

Aim:

This paper aims to describe health science students’ use of SM for educational purposes and its association with their academic performance.

Methods:

Two hundred ninety-seven undergraduate health science students completed a self-administered questionnaire comprising 4 sections related to social media.

Results:

Almost all students (99.7%) reported using SM for learning, most (90.9%) of them daily. The most preferred type of SM learning was Facebook. Most students thought that using SM for learning is convenient and useful. They suggested there should be 1 Facebook account for each subject, that every classmate could access to obtain knowledge from lecturers and to interact between students and lecturers. The logistic regression model showed that the more time students practiced following the advice on posted information, the more likely they were to achieve a GPA at distinction level or above (OR = 4.2; OR = 5.4, and OR = 9.4, respectively with times of practicing). Conversely, the students who used SM for learning less than once a month were less likely to obtain a GPA at distinction level (OR = 0.5).

Conclusions:

Almost all health science students used SM to support learning and use of SM for learning was associated with higher academic performance.
Indigenous Health Systems and Adolescent Sexual Health in Umguza and Mberengwa Districts of Zimbabwe: Community Key Stakeholders’ Perspectives
Authors: Nunu Wilfred Njabulo , Makhado Lufuno , Mabunda Jabu Tsakani , Lebese Rachel Tsakani
Published: April 2021

Different stakeholders play varying roles in shaping up adolescent sexual behaviours that, in turn, influence their sexual experiences. In Zimbabwe, it has been reported that adolescents from cultural districts exhibit poor sexual health outcomes as compared to other districts. Therefore, this study sought to explore the role of different key community stakeholders in the indigenous health system and how it impacts on adolescent sexual health issues. The study further explored how the indigenous health system could be integrated into the modern health system. A qualitative cross-sectional survey was conducted on purposively and snowballed respondents in Umguza and Mberengwa districts. Interviews and focus group discussions were used to gather and record data from participants. The recorded data were transcribed verbatim, translated to English, coded and thematically analysed on MAXQDA Analytics Pro 2020. Four superordinate and 12 subordinate themes emerged from the data during analysis. Stakeholders play varied roles in adolescents’ upbringing and support though there are contradicting teachings from the indigenous health system and modern health system. It is possible to integrate these two systems though there were foreseen logistical challenges and clashes in the values and belief systems. Participants made suggestions on how these challenges could be overcome. There is a window of opportunity to pursue the suggested ways of integrating indigenous health systems and modern health systems for improved adolescent sexual health outcomes.
Post-feminist German heartland: On the women’s rights narrative of the radical-right populist party Alternative für Deutschland in the Bundestag
Authors: Sprengholz Maximilian
Published: April 2021

This essay sketches out the post-feminist narrative employed by the radical-right populist party Alternative für Deutschland in the German national parliament between October 2017 and July 2018. Striving to establish a hegemonic ontology, the Alternative für Deutschland conjures up a social imaginary of a German heartland, where equal rights between ‘naturally’ different women and men have long been achieved – a heartland that has to be protected from ‘Muslim culture’ as much as from the ‘leveling down’ imposed by a ‘radical feminist elite’. Between these frames, the Alternative für Deutschland presents itself as the only true champion of women and, while never asserting to be feminist, implicitly lays claim to a particular and exclusivist post-feminist position. I argue that the Alternative für Deutschland’s capabilities to promote this populist narrative have become further enhanced by its election to the national parliament, presenting a serious challenge and also a chance for German feminism to self-critically engage with issues of intersectionality and representation in public discourse.