bluuebunny/crossref_metadata_2025_split huggingface dataset:
Residual and Direct Contact Toxicities of Crude Extracts and Essential Oils from Acorus calamus L. (Acoraceae) Rhizomes against Cassava Red Mites (Acari: Tetranychidae)
Authors: Janlaor Kitiya , Auamcharoen Wanida 
Published: April 2021

Abstract
Tetranychus truncatus Ehara (Acari: Tetranychidae) is a serious economic pest of many plants in Thailand and other countries. The use of plant extracts is an alternative to conventional synthetic pesticides for controlling mite pests. This study was conducted to evaluate the residual and direct contact toxicities of crude extracts and essential oils obtained from Acorus calamus L. (Acoraceae) rhizomes against T. truncatus eggs and adult females under laboratory conditions. Residual toxicity was assayed by applying compounds on leaf discs and then releasing adult female mites on the discs; direct contact toxicity was assayed by spraying the compounds on eggs and adult females. In residual assays, a 10% (v/v) concentration of essential oils extracted from fresh A. calamus rhizomes caused 73.8% mortality of T. truncatus adults, while treatment with oils from dried rhizomes caused 91.8% mortality of adults. In direct-contact toxicity assays, essential oils from fresh rhizomes reduced egg hatch by 96.3% at 5% (v/v) concentration and 100.0% at 10%. Oils extracted from dried rhizomes reduced egg hatch by 28.8% at 5% and 91.8% at 10%. The respective median lethal concentrations (LC50s) were 2.18% and 5.91%, based on cumulative mortality at 7 d after treatment. Methylene chloride extracts from fresh and dried rhizomes (individual extraction method) caused a cumulative adult mite mortality of 100% and 91.4% at 5% (v/v) concentration, with LC50s of 1.31% and 2.52%. Based upon our results, essential oils and methylene chloride extracts from A. calamus rhizomes appear as suitable botanical acaricides for further development for the management of T. truncatus.
CORPO-EXPERIMENTAÇÕES: A COMPOSIÇÃO DE PRÁTICAS CORPORAIS NA EDUCAÇÃO INFANTIL EM MEIO AO DISTANCIAMENTO SOCIAL
Authors: Raymundo Diewerson do Nascimento , Pacheco Eduardo Guedes 
Published: April 2021

Este artigo propõe-se a revisitar algumas práticas corporais desenvolvidas entre 2019 e 2020 com crianças entre 3 e 5 anos de uma escola privada de Educação Infantil de Viamão/RS. Pelo viés da Arte-Educação em diálogo constante com a Pedagogia e a Filosofia, provocou-se um modo de problematizar, pensar e criar corporalmente mobilizado por obras de artes visuais, por grafismos indígenas, por sonoridades e gestualidades. A cartografia foi a metodologia utilizada a partir das colaborações de Gilles Deleuze e Félix Guattari, Eduardo Passos e Virgínia Kastrup. As corpo-experimentações criadas colaboraram para proposição de práticas pedagógicas mais desafiadoras às crianças mesmo durante o distanciamento social e ensino remoto.
An improved and highly efficient geometry for facemasks
Authors: Cappa Christopher , Ristenpart William , Barreda Santiago , Bouvier Nicole , Wexler Anthony , Roman Sanziana , Department The San Francisco Opera Costume 
Published: April 2021

Abstract
Wearing masks and face coverings helps reduce transmission of respiratory diseases. Much prior research on mask filtration efficiency has focused on fabric type, with little consideration given to mask geometry. Here, we present evidence that increasing the mouth-mask separation distance engenders an increase in the mask-fabric filtration efficiency towards expiratory aerosols emitted via vocalization, which we attribute to a decrease in the expiratory jet velocity. We further assess the performance of a new reusable cloth facemask design, originally made for professional singers and having a large mouth-mask separation distance. With proper fitting, these masks achieve overall filtering efficiencies of >93% for both exhaled expiratory aerosols from singing and speaking and for inhaled ambient aerosols, better than surgical masks and approaching N95 respirators. The mask design also provides for less inhibited mouth and jaw movement, suggesting it may provide a more palatable, high-efficiency alternative to medical-grade masks for the public.
Processing Technique Selection for Steels Based on Mechanical Properties Using Machine Learning Framework
Authors: Choudhury Amitava 
Published: April 2021

Abstract
Prediction of process route from materials with a desired set of property is one of the fundamental issues in the perspective of the materials design aspect. The parameter space is often too large to be bound since there are too many possibilities. However, in the areas with limited theoretical access, artificial learning techniques can be attempted by using the available data of the candidate materials. In this study, a computational method has been proposed to predict the different process routes of steel constituted taking composition and desired mechanical properties as inputs. First of all, historical data of the actual rolling process was collected, cleaned, and integrated. Further, the dataset is divided into four different classes based on the rolling process data. Then, to find out the essential characteristics of variables, feature correlation among various features has been calculated. A state-of-art machine learning prediction methods such as logistic regression, K- nearest neighbor, Support vector machine, and the random forest are studied to implement the prediction model. In order to avoid the overfitting of the model, k fold cross-validation is applied to the model, and achieve a realistic prediction result with an accuracy of 97%. The F1-score of the classification model is 0.86, and the kappa score is 0.95, which comply that the model has excellent learning and speculation ability and the precise forecast of steel process routes based on the given input parameters.
Study On Critical Temperatures For Naphthalene And Chlorobenzene Removal During In Situ Steam Injection Remediation
Authors: Liu Ru xue , Yang Xinru , Zhao Yongsheng 
Published: April 2021

Abstract
Steam injection is an effective technique for the in situ remediation of volatile and semi-volatile organic contaminants. In this study, the influence of temperature and media on the removal of organic pollutants, such as naphthalene and chlorobenzene, was investigated in the remediation process through batch and remediation experiments, and the solid, liquid, and gaseous phase migration and transformation of organic pollutants during remediation were evaluated. The results demonstrated that the temperature significantly influenced the removal of organic pollutants. It was found that the critical temperatures for naphthalene and chlorobenzene were 50°C and 30°C, respectively. When the temperature was higher than the critical temperature, the final removal rates of naphthalene and chlorobenzene reached over 94% and 96%, respectively. The remediation area of chlorobenzene determined according to the critical temperature has a good result; the error compared with the actual remediation area in both coarse sand and fine sand was approximately 8.7%. In the simulation tank, the temperature changes can be divided into three stages: the ambient temperature stage, the temperature rapid rise stage, and the stable stage. Moreover, we found that the remediation effect of aquifers is not only related to temperature, but also to the location of the SVE well (soil vapour extraction). These findings reveal the main factors affecting the application of hot steam technology and the relationship between the temperature field and contamination field in the remediation process.
Predicting and analyzing of tribo-performance of NAO friction composites using Taguchi method
Authors: Yusubov Fikrat 
Published: April 2021

Abstract
The present study is aimed to investigate the dry sliding behavior of phenolic friction brake pad materials for industrial applications. Low metallic phenolic friction composites with addition copper-graphite (Cu-C) particles produced by traditional powder metallurgy methods. The friction test is carried out by pin-on-disc configuration on universal tribometer MMW-1 with hardened steel as a counterface material. The plan of experiments conducted by Taguchi’s L27 orthogonal array on MINITAB 19.1.1 software using 3-level design model. Analysis of variance (ANOVA) was performed for predicting and analyzing the effect of design parameters like contact pressure (1.9, 5.75 and 9,6 MPa), sliding velocity (0.64, 1.57 and 2.5 m/s) and filler content (5, 10 and 15%) to tribological properties. Results of modeling and optimization of composites has showed that contact pressure has the greatest impact on the friction process following sliding distance and filler content. On the other hand, the most influential factor for the wear process was the sliding velocity, following contact pressure and finally filler content. It has also been determined that 5–10 Wt.% Cu-C filler content has an effective impact on tribological properties. The friction surface examination of the composites using a scanning electron microscope (SEM) revealed that Cu-C content has a significant effect on improving heat resistance properties.
Ovarian Tissue Culture for Fertility Preservation in Male Transgender Patients After Hormonal Treatment
Authors: Bottini Alessandra Leal , Reis Vânia Marisia Fortes dos , Capp Edison , Silva Ilma Simoni Brum da , Kliemann Lúcia Maria Lúcia Maria , Corleta Helena von Eye 
Published: April 2021

Abstract
The aim of this study was to evaluate the reproductive and histological characteristics of fresh cultured ovarian tissue from transgender male patients. Methods: In vitro experimental study. Samples were collected during sex reassignment surgery for male transgender patients. Ovarian cortex was cut into fragments of 2, 3 and 4 mm and placed in a 96-well plate suitable for cultivation at days zero, 2, 4, 6 and 8, when the histology was analyzed. Results: Stromal hyperplasia was observed in all samples. Presence of stromal hyperplasia was not associated with obtaining primordial or primary follicles. Peripheral reduction in cells number was also a recurrent finding. Primordial and primary follicles were identified with a heterogeneous pattern between fragments from the same patient and between different patients, and follicles in more advanced stages of development (secondary and antral) were not found. There was an association between the diameter of the ovarian fragments and the identification of primary follicles (p=0.036). The number of days in culture was associated with histological signs of tissue suffering in the fragments (p=0.002). The total number of follicles identified in the 2 mm diameter samples was significantly lower than in the 4 mm diameter samples (p=0.031). Conclusion: Even after prolonged exposure to testosterone, ovaries presented primordial and primary follicles, maintaining viability over the days exposed to the culture. Follicles at more advanced stages of development were not identified. These findings suggest that in female to male transgender patients reproductive potential may be preserved to the time of reassignment surgery.
Determinants of Elevated D-Dimer Levels and Long-Term Outcome in Elderly Patients With End-Stage Heart Failure
Authors: Tian Aiju , Yang Chengzhi , Weng Shengfeng , Chen Xiaoli , Liu Hong , Luo Zhi 
Published: April 2021

Abstract
Background

Previous studies have shown that heart failure is associated with hemostatic abnormalities and hypercoagulable state. Plasma D-dimer levels reflect both fibrin formation and degradation, and elevated D-dimer levels have been associated with poor prognosis in patients with heart failure. However, little is known about their roles in elderly patients with end-stage HF. In present study, we aimed to explore the clinical significance and determinants of plasma D-dimer in elderly patients with end-stage heart failure.
Methods

A total of 177 patients with heart failure at Beijing Geriatric Hospital from November 1, 2015 to December 30, 2018 were enrolled. All hospitalized patients were obtained D-dimer levels within the first 24 h following admission after obtaining informed consent. Primary endpoint was all-cause mortality.
Results

A total of 60 patients had elevated D-dimer levels. Blood urea nitrogen (β = 1.106, 95% CI: 1.029–1.190, p = 0.006), NYHA functional class (β = 2.179, 95% CI: 1.170–4.056, p = 0.014) and white blood cell counts (β = 1.188, 95% CI: 1.040–1.358, p = 0.011) were independent risk factors for elevated D-dimer in elderly patients with end-stage heart failure. Albumin (β = 0.803, 95% CI: 0.728–0.885, P ༜ 0.001) was negative risk factor for elevated D-dimer in elderly patients with end-stage heart failure. Elevated D-dimer level was independently associated with increased risk of long-term all-cause mortality (P = 0.048).
Conclusions

For elderly patients with end-stage heart failure, D-dimer levels were associated with white blood cell counts, blood urea nitrogen, albumin and NYHA functional class and elevated D-dimer level was independently associated with poor long-term outcome.
An Enhanced Support Vector Machine Model for Classification of Transit-Oriented Development
Authors: Khare Rupali , Villuri Vasanta Govind kumar , Chaurasia Devarshi 
Published: April 2021

Abstract
Transit-oriented development (TOD) can invigorate sustainable development by conveying a more coordinated transit and surrounding land use. Given the dynamic nature of urban community development, urban planners find it hard to precisely respond to questions such as where TOD planning around the transit hubs can succeed in the city. The present study proposes a framework utilizing a support vector machine (SVM) to enhance the TODness prediction of an area to address this issue. An SVM model has successfully applied to 16 bus rapid transit station areas in Bhopal city, India, using the tenfold cross-validation resampling methods and thirteen predictor variables. The models performance was in good agreement with 93.75% precision, utilizing the sigmoid kernel function and the regularization parameter esteem equivalent to 4. This methodology could be used at any scale, and the outcomes could offer recommendations for more accurate urban planning, fortifying the relationship between TOD and spatial association. The study provides the basis for predicting better future TODness classification, which will help the urban planner for sustainable urban planning and policy making.
The Potential of Ascophyllum Nodosum to Accelerate Green Waste Composting
Authors: Al-Dulaimi Omar , Rateb Mostafa E , Hursthouse Andrew S , Thomson Gary , Yaseen Mohammed 
Published: April 2021

Abstract
Millions of tonnes of green waste are produced annually in the UK. The process of composting usually extends to more than two months as well producing greenhouse gases which affect the environment. We proposed a potential approach to use algal extract from Ascophyllum nodosum as a compost accelerator. Seaweed-based treatments offer an economical and effective biological solution which activates and stabilises the decomposition of organic matter. Reducing both the cost and time associated with widely used composting approaches. The seaweed was collected from Scottish coastline, extracted, and formulated to enhance application. Its effects on the timeline of the composting process was systematically investigated through physical, biological, and observational quantification. The emission of gases, the pH, temperature, humidity, consistency, and microbial growth of the compost were studied.Interestingly, the results showed that the compost reached a stability status within 6 weeks, less ammonia and lower carbon dioxide produced. The use of this formulation has the potential to minimise expense, reduce resources used, and lower the levels of harmful volatile organics. This approach is economically beneficial and environmentally crucial in compost formulation, the control of contamination, and reduction of greenhouse gases.
Psychological effect of COVID-19 pandemic on healthcare professionals of Yemen and coping strategies
Authors: Mahmood Nagd Mohammed Ahmed , Saleem Mohammad , Khadka Sitaram , Alkamel Maroa Ahmed Ali Mohammed , Khudhiere Maged Mohammed Salem Seed Khudhiere , Adnan Muhammad Abdul Jabar Adnan 
Published: April 2021

Abstract
Background: COVID-19 pandemic has triggered psychological stress such as anxiety and depression among people around the globe. Due to the nature of the job, healthcare professionals are at high risk of infection and are facing social stigma as well. In such a scenarios, it has aggravated their mental health and they are applying various measures to cope with such adverse scenario. Therefore, this research is conducted with the objective to evaluate the psychological influence of the COVID-19 pandemic among healthcare professionals of Yemen and the coping strategies adopted thereof.Methods: A web-based, as well as face-to-face cross-sectional study, was carried out from July 2020 to December 2020 among healthcare professionals currently working in different provinces of Yemen using a standard questionnaire. The generalized anxiety disorder scale (GAD-7), patient health questionnaire (PHQ-9), and Brief-COPE scales were applied for evaluation of anxiety, depression, and the coping strategies among them.Results: A total of 197 healthcare professionals (N=197) participated in the study where the majority were male 68.5% (n=135) in gender and physicians 42.13% (n=83) by profession. The prevalence of both anxiety (6.84±5.67 for male and 7.37±4.44 for female) and depression (8.06±6.51 for male and 9.56±6.46 for female) were found of mild category among the respondents. A significant statistical difference was observed between physician versus nurse regarding anxiety and depression based on the working area (p=0.017). Trained professionals demonstrated less anxiety (6.29±5.33) and depression (7.90±6.78) as compared to untrained ones. Source of stress varied in a different province where high fear of self-health and family members was found more in female (3.90±1.00) and such fear was found more in province Sanaa, Lahij, and Abyan (4.75±0.96), (4.57±1.27) (4.50±2.12) respectively. Religion was indicated as a highly adopted coping strategy meanwhile emotional support was found the least used.Conclusions: COVID-19 pandemic has aggravated the psychological stress among healthcare professionals of Yemen. Our findings illustrate the requirement of efficient policies through administrative, clinical, and welfare perspectives from the regulatory body in preparedness and preventive measures towards such pandemic that aids healthcare professionals to provide service in a stress-free condition and thus better healthcare delivery are assured.
Radio over Fiber Based Spectrally Encoded OCDM To Support 5G &amp; Beyond 5G Mobile Fronthaul Network Challenges
Authors: Saminathan Brindha , Ilavarasan T. , M Meenakshi , Sivasakthi T. , Blessy Maria Christina , Devibalan K. , Lakshmi G. 
Published: April 2021

Abstract
Multi-operator Multi-Service support over mobile fronthaul network would be an important requirement in the evolving 5G Wireless Communication architectures. This in turn dictates the need for high capacity and high connectivity fronthaul options. Optical Code Division Multiplexing over Wavelength Division Multiple Access could be one of the most promising system architectures to support last/first mile bottleneck of the Mobile Networks. This paper reports comparison impact of the energy efficiency and electromagnetic radiation effects for a multi-operator multi-service OCDM based Spectrally Amplitude Encoded Analog Radio over Fiber front-haul for a small cell configuration. The WDM multiplexed mm wave signals at 60GHz and 28GHz and Prime code based spectral amplitude patterns assigned for conventional services are analyzed and compared with Wavelength Division Multiple Access system of the same kind. The comparison results confirms that proposed architecture will be a suitable candidate to meet 5G challenges of Mobile fronthaul Networks.
Fetal Reduction in High Order Pregnancy; A Retrospective Observational Study
Authors: taha Manal shaker , Ibrahim Abdullah Al , Amu Olubusola , Al-Obaidly Sawsan , Chandra Prem , mansorri Zeena Al , Kenyab Najat , Al-Janahi Najah 
Published: April 2021

Abstract
Background:High order multiple pregnancy (HOMP), is considered a high-risk pregnancy as it has many complications on the mother and the fetuses, with a huge financial burden on the hospitals. Therefore avoiding HOMP is important, however, if this fails, fetal reduction is an acceptable alternative procedure to reduce maternal complications and improve fetal outcome.Our aim to study the impact of a fetal reduction on the risk of preterm labour and postpartum hemorrhage in HOMP (More than Triplet).Methods:This is a retrospective study of all HOMPs seen during the period from July 2007 to July 2017 at Women’s Hospital- Hamad General Hospital, Doha, Qatar. We examined records of 50 women diagnosed with HOMP, incomplete records, and triplet pregnancies were excluded from the study. the data were collected from the ultrasound software as well as maternal files. Results:Of the 50 women diagnosed with HOMP, 39 quadruplets, 7 quintuplets.2 sextuplets and 2 septuplets. 56% had an ovulation induction, 26% had an IVF, 14% had an IUI, and 2 cases (4%) were spontaneous pregnancies.(28%) had a fetal reduction, with a mean gestation age of 12.64 ± 0.74 weeks of gestation, and with no immediate complications. Our study showed that there is no significant difference at time of delivery between reduced and non reduced group mean gestational age at the time of delivery for the reduced group was 30.26 ± 4.38, and 29.39 ± 4.78 weeks for the non-reduced group. P-value of 0.565 , 95% CI (-2.159-3.90). 44.9% had postpartum haemorrhage with a mean estimated blood loss of 1659.1 ± 958.5 mls. Our study showed that there is significant decrease in estimated blood loss in reduced group compared with non-reduced group with p-value of 0.047 ConclusionHigh order multiple pregnancies are a result of modern infertility treatments has significant serious adverse effects on the mother and the babies. Although fetal reduction reduced the rate of PPH but did not significantly improve the rate of preterm labour, hence prevention of HOMP is the primary goal.
Elimination of Oxidative Stress and Genotoxicity of Biosynthesized Titanium Dioxide Nanoparticles in Rats via Supplementation with Whey Protein-Coated Thyme Essential Oil
Authors: Abdel-Wahhab Mosaad Attia , El-Nekeety Aziza A. , Mohammed Hagar E , Elshafey Ola I. , Abdel-Aziem Sekena H. , Hassan Nabila S. 
Published: April 2021

Abstract
The green synthesis of metal nanoparticles is growing dramatically; however, the toxicity of these biosynthesized particles against living organisms is not fully explored. Therefore, this study was designed to synthesize and characterize TiO2-NPs, encapsulation and characterization thyme essential oil (ETEO), determination of the bioactive constituents of ETEO using GC-MS and evaluate their protective role against TiO2-NPs-induced the oxidative damage and genotoxicity in rats. Six groups of rats were treated orally for 30 days including the control group, TiO2-NPs (300 mg/kg b.w)-treated group, ETEO at low (50 mg/kg b.w) or high dose (100 mg/kg b.w)-treated groups TiO2-NPs plus ETEO at the two doses-treated groups. Blood and tissues were collected for different assays. The GC-MS results indicated the presence of 21 compounds belongs to phenols, terpene derivatives, and heterocyclic compounds. The synthesized TiO2-NPs were 45 nm tetragonal particles with a zeta potential of -27.34 mV; however, ETEO were 119 nm round particles with a zeta potential of -28.33 mV. TiO2-NPs administration disturbs the liver and kidney markers, lipid profile, cytokines, oxidative stress parameters, the apoptotic and antioxidant hepatic mRNA expression and induced histological alterations in the liver and kidney tissues. ETEO could improve all these parameters in a dose-dependent manner. It could be concluded that ETEO is a promising candidate for the protection against TiO2-NPs and can be applied safely in food applications.