bluuebunny/crossref_metadata_2025_split huggingface dataset:
The surface and bulk properties of CuO ribbons and ZnO particles mixture using physical adsorption and gamma ray attenuation techniques
Authors: Labib S. , Tohamy M. , Elmaghraby E.K. 
Published: January 2021

AbstractIn the present work, we investigate the surface, and bulk structural properties of composite cupric oxide ribbons, and zinc oxide particles. The composites are synthesized using the technique of solution combustion. Crystallographic phases are confirmed using the x‐ray diffraction technique and proved the formation of monoclinic cupric oxide and hexagonal zinc oxide crystallites. Scanning electron microscope and high‐resolution transmission electron microscope are used to examine the morphology of the prepared materials. Composite mixtures of raw particles cupric oxide and zinc oxide are used as benchmark morphologically‐alike composite materials. The specific surface area values of the studied materials are investigated using nitrogen gas adsorption at 77 K while the spectroscopic gamma ray attenuation is used to determine the effective density of the different samples. Zinc oxide particles are dispersed on cupric oxide ribbons and cause nonlinear dependence of the specific surface area and density on the composition ratio due to the physical contact between particles, especially at the voids and the nodes of the fibrous ribbons network.
The impact of aging and drag‐finishing on the surface integrity and corrosion behavior of the selective laser melted maraging steel samples
Authors: Khan H.M. , Özer G. , Tarakci G. , Coskun M. , Koc E. , Kaynak Y. 
Published: January 2021

AbstractThe maraging steel components fabricated using the selective laser melting process exhibit remarkable static strength. However, high pore density and large surface imperfections impede their overall mechanical and chemical performance. Thus, the components are often post‐treated with mechanical‐ and thermal‐based treatments to overcome their inherent imperfections and enhance their final mechanical properties. Although the post‐processing treatments are useful in enhancing the selective laser melted components’ mechanical performance, their effect on corrosion behavior is not comprehensively evaluated. In this study, the selective laser melting prepared maraging steel samples’ corrosion behavior was examined in the as‐built condition and compared with the post‐processed samples subjected to aging and drag finishing operations. Compared to the as‐built condition, both aging and drag‐finishing post‐processing treatments increased the selective laser melting samples’ corrosion even though the surface integrity was improved.
An equal split triple‐band Wilkinson power divider employing extended cross‐shaped microstrip line
Authors: Barik Rusan Kumar , Laxman Deep T. S. , Karthikeyan S. S. 
Published: January 2021

AbstractIn this article, an equal split triple‐band Wilkinson power divider is reported. The triple‐frequency operation is obtained by employing an extended cross‐shaped microstrip line. This proposed geometry is constructed using a cross‐shaped structure attached with two series microstrip lines at two ports. The circuit parameters are computed from the graphical solutions plotted based on the derived formulas. To validate the synthesis approach, a triple‐band power divider intended to operate at 0.9/3.15/5.4 GHz is developed, fabricated and tested. A good consistency is observed on the tested and simulated performances. The measured isolation and return loss are greater than 28 dB at all the operating frequencies. The prototype provides a good insertion loss of 3 ± 0.3 dB at the center of each frequency band. Considering minimum 15 dB return loss and maximum 0.5 dB amplitude imbalance, the bandwidths at 0.9, 3.15, and 5.4 GHz are obtained as 140, 130, and 110 MHz, respectively.
Effect of radiofrequency shield diameter on signal‐to‐noise ratio at ultra‐high field MRI
Authors: Zhang Bei , Adriany Gregor , Delabarre Lance , Radder Jerahmie , Lagore Russell , Rutt Brian , Yang Qing X. , Ugurbil Kamil , Lattanzi Riccardo 
Published: January 2021

PurposeIn this work, we investigated how the position of the radiofrequency (RF) shield can affect the signal‐to‐noise ratio (SNR) of a receive RF coil. Our aim was to obtain physical insight for the design of a 10.5T 32‐channel head coil, subject to the constraints on the diameter of the RF shield imposed by the head gradient coil geometry.MethodWe used full‐wave numerical simulations to investigate how the SNR of an RF receive coil depends on the diameter of the RF shield at ultra‐high magnetic field (UHF) strengths (≥7T).ResultsOur simulations showed that there is an SNR‐optimal RF shield size at UHF strength, whereas at low field the SNR monotonically increases with the shield diameter. For a 32‐channel head coil at 10.5T, an optimally sized RF shield could act as a cylindrical waveguide and increase the SNR in the brain by 27% compared to moving the shield as far as possible from the coil. Our results also showed that a separate transmit array between the RF shield and the receive array could considerably reduce SNR even if they are decoupled.ConclusionAt sufficiently high magnetic field strength, the design of local RF coils should be optimized together with the design of the RF shield to benefit from both near field and resonant modes.
Quantitative muscle MRI as a sensitive marker of early muscle pathology in myotonic dystrophy type 1
Authors: van der Plas Ellen , Gutmann Laurie , Thedens Dan , Shields Richard K. , Langbehn Kathleen , Guo Zhihui , Sonka Milan , Nopoulos Peggy 
Published: January 2021

AbstractBackgroundQuantitative muscle MRI as a sensitive marker of early muscle pathology and disease progression in adult‐onset myotonic dystrophy type 1. The utility of muscle MRI as a marker of muscle pathology and disease progression in adult‐onset myotonic dystrophy type 1 (DM1) was evaluated.MethodsThis prospective, longitudinal study included 67 observations from 36 DM1 patients (50% female), and 92 observations from 49 healthy adults (49% female). Lower‐leg 3T magnetic resonance imaging (MRI) scans were acquired. Volume and fat fraction (FF) were estimated using a three‐point Dixon method, and T2‐relaxometry was determined using a multi‐echo spin‐echo sequence. Muscles were segmented automatically. Mixed linear models were conducted to determine group differences across muscles and image modality, accounting for age, sex, and repeated observations. Differences in rate of change in volume, T2‐relaxometry, and FF were also determined with mixed linear regression that included a group by elapsed time interaction.ResultsCompared with healthy adults, DM1 patients exhibited reduced volume of the tibialis anterior, soleus, and gastrocnemius (GAS) (all, P < .05). T2‐relaxometry and FF were increased across all calf muscles in DM1 compared to controls. (all, P < .01). Signs of muscle pathology, including reduced volume, and increased T2‐relaxometry and FF were already noted in DM1 patients who did not exhibit clinical motor symptoms of DM1. As a group, DM1 patients exhibited a more rapid change than did controls in tibialis posterior volume (P = .05) and GAS T2‐relaxometry (P = .03) and FF (P = .06).ConclusionsMuscle MRI renders sensitive, early markers of muscle pathology and disease progression in DM1. T2 relaxometry may be particularly sensitive to early muscle changes related to DM1.
The reporting and methodological quality of systematic reviews and meta‐analyses of nursing interventions for chronic obstructive pulmonary disease ‐ A systematic review
Authors: Sun Xiao , Wang Duo , Wang Mei , Li Han , Liu Bo 
Published: January 2021

AbstractAimsThe aim of this review was to evaluate the reporting and methodological quality of systematic reviews and meta‐analyses (SRs/MAs) on nursing interventions in patients with chronic obstructive pulmonary disease (COPD) and to determine potential factors that predict high quality.DesignThe review is a quantitative systematic review.Data SourcesPubMed, Embase and the Cochrane Database of Systematic Reviews.Review MethodsA comprehensive literature search was conducted in three databases for SRs/MAs published up to 6 May 2020. The PRISMA statement and AMSTAR checklist were used to evaluate the reporting and methodological quality.ResultsA total of 130 articles published between 1996–2020 from 69 journals were included in this review. Multivariate regression analyses demonstrated that the following factors were related to the higher reporting quality of included articles: having a protocol or registration and being published on the Cochrane Database of Systematic Reviews. Systematic reviews including meta‐analyses, number of authors >5, number of pages and having protocol or registration were related to higher methodological quality. A strong linear correlation (r = 0.860) was detected between the scores of PRISMA and AMSTAR.ConclusionA significant number of systematic reviews and meta‐analyses on nursing interventions in patients with COPD show suboptimal reporting and poor methodology quality. The use of PRISMA and AMSTAR guidelines in conducting, reading, reviewing and editing systematic reviews and meta‐analyses is recommended to improve the quality of systematic reviews and meta‐analyses.ImpactThe findings of this review can provide references for health workers and health policy makers to evaluate and apply evidence‐based knowledge. Additionally, such high‐quality systematic reviews/meta‐analyses can guide medical and health practice.
Factors associated with resilience in spousal caregivers of patients with cancer: An integrative review
Authors: Sun Haiyan , Qin Yang , Hengudomsub Pornpat 
Published: January 2021

AbstractAimTo explore resilience and associated factors in spousal caregivers of patients with cancer.DesignAn integrative review.MethodsThis review used the standardized critical appraisal instruments developed by the Joanna Briggs Institute and was conducted by researching the electronic databases of Cochrane, CINAHL, ProQuest, Science Direct, PubMed, Scopus, EBSCO and Google Scholar. The articles were published in English with full text from January 2010 to January 2020.ResultsAccording to data retrieval, 26 articles were finally selected. From this review, resilience was typically measured by using exact resilience scales (i.e. Connor‐Davidson or Wagnild Resilience Scales) or using other variables to indicate either more positive psychological outcomes or less negative psychological outcomes. For factors associated with resilience, these were classified as individual internal and external factors. Internal factors included caregiver burden, psychological distress, coping strategies and other factors, whereas social support, couple interaction, patient health status and other parameters were considered external factors.ConclusionsResilience plays an important role in promoting positive adaptation in spite of adversity among the spousal caregivers of patients with cancer. Due to the uniqueness of resilience among spousal caregivers, ways to assess resilience and identify its associated factors deserve more attention and careful consideration.
Exploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures
Authors: Balanuca Brindusa , Ott Cristina , Damian Celina Maria , Iovu Horia , Trusca Roxana , Stan Raluca 
Published: January 2021

AbstractBicomponent polymeric architectures were fabricated through visible‐light polymerization starting from methacrylated and PEGylated high oleic sunflower oil (HO‐SFO) monomers and compatible polyethylene glycol dimethacrylate (PEG‐DMA) capable of swelling in biological simulated fluid. Conversion of the methacryl moieties in the photo‐polymerization reactions was monitored by FTIR spectrometry and also gel fraction measurements. The amount of PEG‐DMA co‐reactant and PEG units grafted on the HO‐SFO backbone were found to directly influence the key properties of the oil‐based polymers. DSC measurements proved that higher content of PEG‐DMA (1:1wt, related to HO‐SFO monomer) influence the crystallinity degree, favoring also the increase of PBS absorption capacity. PEG chains from the HO‐SFO structure acts as mediator for the hydrophobic and hydrophilic components, influencing the system mobility, networks arrangement, affording the higher degree for PBS absorption (almost 70% after 50 days of immersion). For all the studied systems two‐phase absorption process was observed and assigned to the esters hydrolysis, yielding new –COOH and –OH groups, XPS and SEM confirming this hypothesis. Polymers degradation during PBS immersion conduce to the elimination of PEG oligomers and unreacted methacryl moieties from the fatty acids, by diffusion in the swelling medium, phenomenon supported by detectable architectural changes from the SEM images.
Phytochemical discrimination of Pinus species based on GC–MS and ATR‐IR analyses and their impact on Helicobacter pylori
Authors: Gad Haidy , Al‐Sayed Eman , Ayoub Iriny 
Published: January 2021

AbstractIntroductionThe leaves and cones of Pinus plants as well as their essential oils have been used in traditional medicine for the treatment of several ailments.ObjectivesPhytochemical discrimination of Pinus species and investigation of their anti‐Helicobacter pylori activity in vitro and in silico.Materials and MethodsGas chromatography–mass spectrometry (GC–MS) and attenuated total reflectance infrared (ATR‐IR) metabolic profiling of the essential oils of Pinus species. Principal component analysis (PCA) and hierarchal cluster analysis (HCA) were applied for discrimination and segregation of Pinus species.ResultsGC–MS revealed the presence of 76 constituents, where monoterpenes represented the major class with the dominance of α‐pinene (72%) followed by β‐pinene (16%) for P. canariensis. β‐Pinene was the dominant component in P. pinea (24%) followed by terpinolene (11%). α‐Pinene (17%) and caryophyllene (12%) were the major components in P. halepensis, while, 3‐carene (33%) and α‐pinene (17%) represented the major constituents of P. roxburghii oil. By applying PCA and HCA on GC–MS and ATR‐IR data analysis, ATR‐IR displayed much better discrimination for Pinus species. The pine oils showed promising inhibitory effects on Helicobacter pylori. Furthermore, in silico molecular modelling was carried out where the calculated free binding energies of phytochemicals identified ranged from −33.71 to −19.67 kcal/mol for urease and −41.18 to −16.57 kcal/mol for shikimate kinase. This suggests favourable binding of pine essential oil components to both enzymes, thus explaining their potential inhibitory activity on H. pylori.ConclusionGC–MS and ATR‐IR based metabolic analyses could discriminate between Pinus species. Pine essential oils can be used as promising therapeutic drugs to protect against H. pylori infection.
Implementation of drama therapy services in the North American school system: Responses from the field
Authors: Frydman Jason S. , Mayor Christine 
Published: January 2021

AbstractDrama therapy is an emerging mental health practice in North American schools. Yet little research has focused directly on the role of drama therapists in schools or their service navigation practices and challenges. From February to July of 2018, drama therapists affiliated with the North American Drama Therapy Association currently working in North American schools were invited to participate in an online Qualtrics survey. A qualitative thematic analysis was conducted on open‐ended response items, the results of which reflect drama therapists' experiences pioneering direct and indirect services and responding to implementation challenges. Findings suggest that while drama therapists provide a number of critical school services, there are identifiable barriers to full integration into the system. Implications for drama therapists include the need for a further specified and structured role, formalized inclusion in student support teams, consistent opportunities to support both students and staff, more secure funding sources, clear implementation logistics, and increased awareness and education about drama therapy among school administrators, faculty, and mental health support staff.
Experimental and theoretical studies of 1,3,5‐tris (bromomethyl)‐2,4,6‐trimethylbenzene with 2‐pyridone
Authors: Asha R. Nandini , Rahini M. Usha , Daisy Caroline , Nayagam B. Ravindran Durai , Bhuvanesh N. 
Published: January 2021

AbstractIn this present work, a new compound 1‐({2,4,6‐trimethyl‐3,5‐bis[(2‐oxo‐2H‐pyridin‐1‐yl)methyl]phenyl}methyl)‐2H‐pyridin‐2‐one hydrate (M3P) has been synthesized and characterized by IR, 1H, and 13C NMR and single‐crystal X‐ray diffraction analysis. The molecular geometry, frontier molecular orbital energies, and thermodynamic properties of the title molecule were explored using density functional theory (DFT) calculation via B3LYP method with 631++G (d,p) basis set. The compound (M3P) crystallizes in the space group of P‐1 with unit cell parameter a = 9.8224(12) Å, b = 11.6383(14) Å, c = 11.8865(14) Å, α = 64.6410(10)°, β = 81.156(2)°, γ = 69.5910(10)°, V = 1150.8(2) Å3, and Z = 2. Furthermore, Hirshfeld surface analysis was performed to observe better intermolecular interactions in the crystal packing. The nature of the interaction of M3P with DNA and BSA protein was studied using molecular docking analysis. DNA binding studies were also done using UV spectrophotometric method. The compound moderately binds with CT‐DNA which is comparable with the docking results. in vitro anti‐microbial activities against some bacterial and fungal strains were investigated. M3P shows good response against bacteria Pseudomonas aeruginosa and Klebsiella pneumonia and fungi Candida albicans and Aspergillus niger.
Targeted poverty alleviation in China: Evidence from Jingdong e‐commerce poverty alleviation
Authors: Fang Lijie , Huang Chien‐Chung 
Published: January 2021

AbstractInequalities within and between countries continue to grow as a result of globalization. Although traditional anti‐poverty efforts from governments and NGOs have had their respective successes, poverty continues to exist in every country, particularly in rural areas where there are fewer resources to support socioeconomic development. Private enterprises may use their strengths, including market knowledge and accessibility to various resources, to develop innovative business models that can provide viable and effective solutions to social problems such as poverty. This article examines a case study of a poverty alleviation initiative by Jingdong (JD). The results indicate that JD utilizes industrial poverty alleviation to empower local enterprises. Through the use of education and training, finance, and employment support, JD builds an ecosystem that provides local enterprises high‐quality employees and reliable logistics with which to conduct business. As a result, the JD model enables local enterprises to compensate farmers with sufficient wages that can reduce poverty and improve their well‐being, creating a mutually beneficial solution for all stakeholders. The findings demonstrate the potential of a private enterprise to reduce poverty in a way that might not be otherwise independently achieved by government and NGOs.
Prostate‐to‐bladder cross‐sensitization in a model of zymosan‐induced chronic pelvic pain syndrome in rats
Authors: Aydogdu Ozgu , Gocun Pinar Uyar , Aronsson Patrik , Carlsson Thomas , Winder Michael 
Published: January 2021

AbstractBackgroundThe aim of the present study was to investigate the effects of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) on bladder function and pathophysiology.MethodsTo create a model for CPPS, rats were intraprostatically injected with zymosan or saline, serving as control. Metabolic cage experiments were performed 7, 14, or 21 days after zymosan injection and after 14 days in the control group. Thereafter, cystometry was performed in which simulated micturition cycles were induced by saline infusion and contractile responses to the cholinergic agonist methacholine and the purinergic agonist ATP were measured. Following cystometry, the prostate and urinary bladder were excised and assessed histopathologically for possible inflammatory changes.ResultsMetabolic cage data revealed a significantly increased urinary frequency in zymosan treated rats. Likewise, the volume per micturition was significantly lower in all CPPS groups compared to controls. Cystometry showed a significant increase in the number of nonvoiding contractions, longer voiding time, and a trend towards lower compliance in CPPS rats compared to controls. Induction of CPPS led to significantly reduced cholinergic and purinergic contractile responses. Histopathological analysis demonstrated prostatic inflammation in all CPPS groups, in particular in later stage groups. Both the extent and grade of bladder inflammation were significantly higher in CPPS groups compared to controls.ConclusionsThe current findings demonstrate a potential prostate‐to‐bladder cross‐sensitization leading to symptoms of bladder overactivity and signs of bladder inflammation. Future clinical studies are required to verify the outcomes of the current study and enable advancement of patient care.
Deep learning‐based X‐ray inpainting for improving spinal 2D‐3D registration
Authors: Esfandiari Hooman , Weidert Simon , Kövesházi István , Anglin Carolyn , Street John , Hodgson Antony J. 
Published: January 2021

AbstractBackgroundTwo‐dimensional (2D)‐3D registration is challenging in the presence of implant projections on intraoperative images, which can limit the registration capture range. Here, we investigate the use of deep‐learning‐based inpainting for removing implant projections from the X‐rays to improve the registration performance.MethodsWe trained deep‐learning‐based inpainting models that can fill in the implant projections on X‐rays. Clinical datasets were collected to evaluate the inpainting based on six image similarity measures. The effect of X‐ray inpainting on capture range of 2D‐3D registration was also evaluated.ResultsThe X‐ray inpainting significantly improved the similarity between the inpainted images and the ground truth. When applying inpainting before the 2D‐3D registration process, we demonstrated significant recovery of the capture range by up to 85%.ConclusionApplying deep‐learning‐based inpainting on X‐ray images masked by implants can markedly improve the capture range of the associated 2D‐3D registration task.
Synthesis, Magnetic and Electrical Characteristics of Ba‐Sr Hexaferrites Substituted with Samarium, Chromium and Aluminum
Authors: Yang Yujie , Feng Shuangjiu , Kan Xucai , Lv Qingrong , Trukhanov A. V. , Trukhanov S. V. 
Published: January 2021

AbstractA series of M‐type Ba−Sr hexaferrites of composition Ba0.20Sr0.80‐xSmxFe12‐y(Cr0.5Al0.5)yO19 (x=0.00–0.40; y=0.00–0.32) were prepared by solid‐state reaction route. XRD patterns reveals that there is a single magnetoplumbite phase in the hexaferrites with the substitutiom of Sm (0.00≤x≤0.20) and CrAl (0.00≤y≤0.16) contents, while for the hexaferrites containing Sm (x≥0.30) and CrAl (y≥0.24), impurity phase is detected in the structure. The remanence (Br) decreases with increasing substitution content of Sm (0.00≤x≤0.40) and CrAl (0.00≤y≤0.32). With the increase of substitution contents, the intrinsic coercivity (Hcj) increases, while the magnetic induction coercivity (Hcb) first increases, and then decreases. Br has a linear decreasing behavior with increasing temperature from 20 °C to 170 °C. Hcj raises linearly with increasing temperature from 20 °C to 170 °C. The average temperature coefficient of Br (αBr) basically remains constant with increasing substitution content of Sm (0.00≤x≤0.40) and CrAl (0.00≤y≤0.32). The average temperature coefficient of Hcj (αHcj) decreases with increasing substitution content of Sm (0.00≤x≤0.40) and CrAl (0.00≤y≤0.32). The electrical resitivity (ρ) decreases with increasing substitution content of Sm‐CrAl.