bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical analysis for Brownian motion of nonlinear thermal bioconvective stagnation point flow in a nanofluid using DTM and RKF method
Authors: Mondal Surya Kanta , Pal Dulal 
Published: February 2020

Abstract
In the present paper, bioconvective stagnation point flow of nanofluid containing gyrotactic microorganisms over a nonlinearly stretching sheet embedded in a porous medium is considered. The scaling group transformation method is introduced to obtain the similarity transformation to convert the governing partial differential equations to a set of ordinary differential equations. The reduced governing nonlinear differential equations are then solved numerically with Runge–Kutta–Fehlberg method. Differential transform method is employed to justify the results obtained by the numerical method. It is found that both the results matched nicely. It is noticed that the density of motile microorganism distribution grows high with an increase in the values of the bioconvection Peclet number. Further, the rate of heat transfer and the rate of mass transfer increase rapidly with an increment in the thermophoresis parameter, heat source parameter, chemical reaction parameter, and Brownian motion parameter, respectively. This work is relevant to engineering and biotechnological applications, such as in the design of bioconjugates and mass transfer enhancement of microfluidics.
Linking extended and plateau emissions of short gamma-ray bursts
Authors: Matsumoto Tatsuya , Kimura Shigeo S , Murase Kohta , Mészáros Peter 
Published: February 2020

ABSTRACT
Some short gamma-ray bursts (SGRBs) show a longer lasting emission phase, called extended emission (EE) lasting ${\sim}10^{2\!-\!3}\, \rm s$, as well as a plateau emission (PE) lasting ${\sim}10^{4\!-\!5}\, \rm s$. Although a long-lasting activity of the central engines is a promising explanation for powering both emissions, their physical origin and their emission mechanisms are still uncertain. In this work, we study the properties of the EEs and their connection with the PEs. First, we constrain the minimal Lorentz factor Γ of the outflows powering EEs, using compactness arguments and find that the outflows should be relativistic, Γ ≳ 10. We propose a consistent scenario for the PEs, where the outflow eventually catches up with the jet responsible for the prompt emission, injecting energy into the forward shock formed by the prior jet, which naturally results in a PE. We also derive the radiation efficiency of EEs and the Lorentz factor of the outflow within our scenario for 10 well-observed SGRBs accompanied by both EE and PE. The efficiency has an average value of ${\sim}3\, {{\ \rm per\ cent}}$ but shows a broad distribution ranging from ∼0.01 to ${\sim}100{{\ \rm per\ cent}}$. The Lorentz factor is ∼20–30, consistent with the compactness arguments. These results suggest that EEs are produced by a slower outflow via more inefficient emission than the faster outflow that causes the prompt emission with a high radiation efficiency.
J-PAS: forecasts on dark energy and modified gravity theories
Authors: Aparicio Resco Miguel , Maroto Antonio L , Alcaniz Jailson S , Abramo L Raul , Hernández-Monteagudo C , Benítez N , Carneiro S , Cenarro A J , Cristóbal-Hornillos D , Dupke R A , Ederoclite A , López-Sanjuan C , Marín-Franch A , Moles M , Oliveira C M , Sodré Jr L , Taylor K , Varela J , Vázquez Ramió H 
Published: February 2020

ABSTRACT
The next generation of galaxy surveys will allow us to test one of the most fundamental assumptions of the standard cosmology, i.e. that gravity is governed by the general theory of relativity (GR). In this paper, we investigate the ability of the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) to constrain GR and its extensions. Based on the J-PAS information on clustering and gravitational lensing, we perform a Fisher matrix forecast on the effective Newton constant, μ, and the gravitational slip parameter, η, whose deviations from unity would indicate a breakdown of GR. Similar analysis is also performed for the DESI and Euclid surveys and compared to J-PAS with two configurations providing different areas, namely an initial expectation with 4000 deg2 and the future best case scenario with 8500 deg2. We show that J-PAS will be able to measure the parameters μ and η at a sensitivity of $2\!-\!7{{\ \rm per\ cent}}$, and will provide the best constraints in the interval z = 0.3–0.6, thanks to the large number of ELGs detectable in that redshift range. We also discuss the constraining power of J-PAS for dark energy models with a time-dependent equation-of-state parameter of the type w(a) = w0 + wa(1 − a), obtaining Δw0 = 0.058 and Δwa = 0.24 for the absolute errors of the dark energy parameters.
The effects of disc self-gravity and radiative cooling on the formation of gaps and spirals by young planets
Authors: Zhang Shangjia , Zhu Zhaohuan 
Published: February 2020

ABSTRACT
We have carried out 2D hydrodynamical simulations to study the effects of disc self-gravity and radiative cooling on the formation of gaps and spirals. (1) With disc self-gravity included, we find stronger, more tightly wound spirals and deeper gaps in more massive discs. The deeper gaps are due to the larger Angular Momentum Flux (AMF) of the waves excited in more massive discs, as expected from the linear theory. The position of the secondary gap does not change, provided that the disc is not extremely massive (Q ≳ 2). (2) With radiative cooling included, the excited spirals become monotonically more open (less tightly wound) as the disc’s cooling time-scale increases. On the other hand, the amplitude and strength of the spirals decrease when the cooling time increases from a small value to ∼1/Ω, but then the amplitude starts to increase again when the cooling time continues to increase. This indicates that radiative dissipation becomes important for waves with Tcool ∼ 1. Consequently, the induced primary gap is narrower and the secondary gap becomes significantly shallower when the cooling time becomes ∼1/Ω. When the secondary gap is present, the position of it moves to the inner disc from the fast cooling cases to the slow cooling cases. The dependence of gap properties on the cooling time-scale (e.g. in AS 209) provides a new way to constrain the disc optical depth and thus disc surface density.
SALT revisits DY Cen: a rapidly evolving strontium-rich single helium star
Authors: Jeffery C Simon , Rao N Kameswara , Lambert David L 
Published: February 2020

ABSTRACT
The hydrogen-deficient star DY Cen has been reported as an R CrB-type variable, an extreme helium star (with some hydrogen), and as a single-lined spectroscopic binary. It has been associated with a dramatic change in visual brightness and colour corresponding to a change in effective temperature ( Teff) of some 20 000 K in the last century. To characterize the binary orbit and  Teff changes more precisely, new high-resolution spectroscopy has been obtained with SALT. The previous orbital period is not confirmed; previous measurements may have been confused by the presence of pulsations. Including data from earlier epochs (1987, 2002, and 2010), self-consistent spectral analyses from all four epochs demonstrate an increase in  Teff from 18 800 to 24 400 K between 1987 and 2015. Line profiles demonstrate that the surface rotation has increased by a factor of 2 over the same interval. This is commensurate with the change in  Teff and an overall contraction. Rotation will exceed critical if contraction continues. The 1987 spectrum shows evidence of a very high abundance of the s-process element strontium. The very rapid evolution, non-negligible surface hydrogen and high surface strontium point to a history involving a very late thermal pulse. Observations over the next 30 yr should look for a decreasing pulsation period, reactivation of R CrB-type activity as the star seeks to shed angular momentum and increasing illumination by emission lines from nebular material ejected in the past.
The role of galaxy mass on AGN emission: a view from the VANDELS survey
Authors: Magliocchetti M , Pentericci L , Cirasuolo M , Zamorani G , Amorin R , Bongiorno A , Cimatti A , Fontana A , Garilli B , Gargiulo A , Hathi N P , McLeod D J , McLure R J , Brusa M , Saxena A , Talia M 
Published: February 2020

ABSTRACT
We present a comparative analysis of the properties of active galactic nuclei (AGNs) emitting at radio and X-ray wavelengths. The study is performed on 907 X-ray AGNs and 100 radio AGNs selected on the CDFS and UDS fields and makes use of new and ancillary data available to the VANDELS collaboration. Our results indicate that the mass of the host galaxy is a fundamental quantity that determines the level of AGN activity at the various wavelengths. Indeed, large stellar masses are found to be connected with AGN radio emission, as virtually all radio-active AGNs reside within galaxies of M* &gt; 1010 M⊙. Large stellar masses also seem to favour AGN activity in the X-ray, even though X-ray AGNs present a mass distribution that is more spread out and with a non-negligible tail at M* ≲ 109 M⊙. Stellar mass alone is also observed to play a fundamental role in simultaneous radio and X-ray emission: the percentage of AGNs active at both wavelengths increases from around 1 per cent of all X-ray AGNs residing within hosts of M* &lt; 1011 M⊙ to ∼13 per cent in more massive galaxies. In the case of radio-selected AGNs, such a percentage moves from ∼15 per cent to ∼45 per cent (but up to ∼80 per cent in the deepest fields). Neither cosmic epoch, nor radio luminosity, X-ray luminosity, Eddington ratio or star formation rate of the hosts are found to be connected to an enhanced probability for joint radio + X-ray emission of AGN origin. Furthermore, only a loose relation is observed between X-ray and radio luminosity in those AGNs that are simultaneously active at both frequencies.
Updated fundamental constant constraints from Planck 2018 data and possible relations to the Hubble tension
Authors: Hart Luke , Chluba Jens 
Published: February 2020

ABSTRACT
We present updated constraints on the variation of the fine structure constant, αEM, and effective electron rest mass, me, during the cosmological recombination era. These two fundamental constants directly affect the ionization history at redshift z ≃ 1100 and, thus, modify the temperature and polarization anisotropies of the cosmic microwave background (CMB) measured precisely with Planck . The constraints on αEM tighten slightly due to improved Planck 2018 polarization data but otherwise remain similar to previous CMB analysis. However, a comparison with the 2015 constraints reveals a mildly discordant behaviour for me, which from CMB data alone is found below its local value. Adding baryon acoustic oscillation data brings me back to the fiducial value, $m_{\rm e}=(1.0078\pm 0.0067)\, m_{\rm e,0}$, and also drives the Hubble parameter to H0 = 69.1 ± 1.2(in units of ${\rm km \, s^{-1} \, Mpc^{-1} }$). Further adding supernova data yields $m_{\rm e}=(1.0190\pm 0.0055)\, m_{\rm e,0}$ with H0 = 71.24 ± 0.96. We perform several comparative analyses using the latest cosmological recombination calculations to further understand the various effects. Our results indicate that a single-parameter extension allowing a slightly increased value of me (≃3.5σ above me, 0) could play a role in the Hubble tension.
Using Drumbeats to Theorize Meter in Quintuple and Septuple Grooves
Authors: Hanenberg Scott J 
Published: February 2020

Abstract
This article explores common approaches taken by drummers when playing music with a quintuple or septuple groove. Based on original analysis from a corpus of 350 songs released during the half-century between 1967 and 2017, I show that these grooves fall into three categories: undifferentiated, in which the drum/s and/or cymbal/s that mark each attack do not change in the course of the groove; backbeat variants, based on the alternation of kick and snare attacks, as in the common-time backbeat; and polymetric grooves comprising two distinct metric cues, often pitting the drums against the rest of the band.
A memory switch for plant synthetic biology based on the phage ϕC31 integration system
Authors: Bernabé-Orts Joan Miquel , Quijano-Rubio Alfredo , Vazquez-Vilar Marta , Mancheño-Bonillo Javier , Moles-Casas Victor , Selma Sara , Gianoglio Silvia , Granell Antonio , Orzaez Diego 
Published: February 2020

Abstract
Synthetic biology has advanced from the setup of basic genetic devices to the design of increasingly complex gene circuits to provide organisms with new functions. While many bacterial, fungal and mammalian unicellular chassis have been extensively engineered, this progress has been delayed in plants due to the lack of reliable DNA parts and devices that enable precise control over these new synthetic functions. In particular, memory switches based on DNA site-specific recombination have been the tool of choice to build long-term and stable synthetic memory in other organisms, because they enable a shift between two alternative states registering the information at the DNA level. Here we report a memory switch for whole plants based on the bacteriophage ϕC31 site-specific integrase. The switch was built as a modular device made of standard DNA parts, designed to control the transcriptional state (on or off) of two genes of interest by alternative inversion of a central DNA regulatory element. The state of the switch can be externally operated by action of the ϕC31 integrase (Int), and its recombination directionality factor (RDF). The kinetics, memory, and reversibility of the switch were extensively characterized in Nicotiana benthamiana plants.
Section 7 of the BC Power of Attorney Act: what does it say and why does it say it?
Authors: Nitikman Joel 
Published: February 2020

Abstract
For a very long time, the common law has provided that an agent does not have the authority to sign a sealed document on behalf of the agent’s principal unless the principal granted authority to the agent to do so under seal. It also provides that an agent who enters into a sealed contract becomes a party personally to the contract and the principal is not a party to the so-called sealed contract rule. This article suggests that both common-law rules have been overtaken by certain legislative provisions in force in British Columbia (BC). In particular, the second rule may not have been in force in the UK since the coming-into-force in 1881 of the Conveyancing and Law of Property Act, the operative part of which has been enacted in BC, various states of Australia, New Zealand and various other Commonwealth countries. The article goes on to suggest that the one UK decision relied on by a leading textbook in support of the continuing validity of the sealed contract rule is not a valid authority on that point.
Lipoprotein(a) and long-term recurrent infarction after an episode of ST-segment elevation acute myocardial infarction
Authors: Miñana Gema , Gil-Cayuela Carolina , Bodi Vicent , de la Espriella Rafael , Valero Ernesto , Mollar Anna , Marco Maria , García-Ballester Teresa , Zorio Begoña , Fernández-Cisnal Agustín , Chorro Francisco J. , Sanchis Juan , Núñez Julio 
Published: February 2020

Background
In established ischemic heart disease, the relationship between lipoprotein(a) and new cardiovascular events showed contradictory results. Our aim was to assess the relationship between lipoprotein(a) and very long-term recurrent myocardial infarction (MI) after an index episode of ST-segment elevation acute myocardial infarction (STEMI).

Methods
We included 435 consecutive STEMI patients discharged from October 2000 to June 2003 in a single teaching center. The relationship between lipoprotein(a) at discharge and recurrent MI was evaluated through negative binomial regression and Cox regression analysis.

Results
The mean age was 65 years (55–74 years), 25.5% were women, 34.7% were diabetic, and 66% had a MI of anterior location. Fibrinolysis, rescue, or primary angioplasty was performed in 215 (49.4%), 19 (4.4%), and 18 (4.1%) patients, respectively. The median lipoprotein(a) was 30.4 mg/dL (12–59.4 mg/dL). After a median follow-up of 9.6 years (4.1–15 years), 180 (41.4%) deaths and 187 MI in 133 (30.6%) patients were recorded. After a multivariate adjustment, the risk gradient of lipoprotein(a) showed a neutral effect along most of the continuum and only extreme higher values identified those at higher risk of recurrent MI (P = 0.020). Those with lipoprotein(a) values >95th percentile (≥135 mg/dL) showed a higher risk of recurrent MI (incidence rate ratio, 2.34; 95% confidence interval, 1.37–4.02; P = 0.002). Lipoprotein(a) was not related to the risk of mortality (P = 0.245).

Conclusions
After an episode of STEMI, only extreme high values of lipoprotein(a) were associated with an increased risk of long-term recurrent MI.
Evaluation of the synergistic effect of cinnamon extract and honey against multidrug-resistant isolates of Pseudomonas aeruginosa recovered from burn unit
Authors: Karami Pezhman , Khaledi Azad , Dastan Dara , Yaghoobi Mojtaba Hedayat , Karami Manoochehr , Mashoof Rasool Yousefi , Alikhani Mohammad Yousef 
Published: February 2020

Background:
Due to rapid increase of drug resistance and failure of the current antibiotics to treat infections caused by Pseudomonas aeruginosa multidrug-resistant (MDR) isolates, introduction of the new therapeutic combinations is needed. This study aimed to evaluate the synergistic effects of cinnamon extracts and honey against MDR isolates of P. aeruginosa recovered from burn unit.

Methods:
The minimum inhibitory concentration (MIC) and minimum bactericidal concentrations (MBC) of each antibiotic (Gentamicin and Ciprofloxacin) alone or in combination with the aqueous and alcoholic extracts of cinnamon and honey was determined by broth microdilution method for clinical and environmental isolates of P. aeruginosa based on the Clinical & Laboratory Standards Institute (CLSI) guidelines. The synergistic effect of combinations was evaluated using a checkerboard test. Data analyzed using chi-square and Fisher's exact tests (SPSS software). P-value of less than 0.05 was considered to indicate statistically significant differences.

Results:
The mean MICs for Cinnamomum zeylanicum alcoholic extract-honey(CZAH), C. zeylanicum watery extract--honey(CZWH), Ciprofloxacin--C. zeylanicum watery extract (CPCZW), Gentamicin--C. zeylanicum watery extract (GMCZW), Ciprofloxacin—C. zeylanicum alcoholic extract (CPCZA), Gentamicin--C. zeylanicum alcoholic extract (GMCZA), Ciprofloxacin—honey (CPH), Gentamicin--honey (GMH) against MDR strains were as 6.80, 15.63, 18.62, 5.84, 10.70, 3.84 and 36.88 μg/ml, respectively. The mean MBC for CZAH, CZWH, CPCZW, GMCZW, CPCZA, GMCZA, CPH and GMH against MDR strains were as 13.17, 30.25, 29.63, 31.52, 11.32, 21.28, 60.11 and 70.03 μg/ml, respectively. According to the FICi results, 14.1, 1.3, 3.8, 19.2, 32.1, 29.5, 9 and 9% of isolates had the synergism for CZAH, CZWH, CPCZW, GMCZW, CPCAA, GMCZA, CPH and GMH combinations, respectively.

Conclusion:
This study showed a proper synergistic effect of aqueous and alcoholic extracts of cinnamon and honey in combination with Ciprofloxacin and Gentamicin against MDR isolates of P. aeruginosa.
Acne vulgaris and antimicrobial resistance: a review
Authors: Varghese Aneena 
Published: February 2020

Background:
Acne is a chronic inflammatory disease of skin follicle on the face, which affects almost 85% youngsters and adolescents. The most common causative agent is Propionibacterium species. The evaluation of antimicrobial activity of turmeric and neem, two Indian herbs in facial cosmetics may provide a better treatment option for acne.

Objective:
The review was to evaluate the microbiological characterization of Propionibacteria isolates from acne vulgaris cases and to identify the antimicrobial action against common antibiotics in use and different herbal extracts.

Method:
A regimented search in the online databases such as PubMed, EMBASE, Google scholar, scopus and so on was done to identify relevant studies according to search strategies. Other search engines were also used, but could not extract relevant articles or studies form those electronic data bases. From the electronic search, 125 articles were identified, after title and abstract review, 96 articles were retained as eligible. A full-text evaluation resulted in 23 studies to be included for review.

Conclusion:
The results suggests that Propionibacterium acnes is the main causative agent for pustular acne vulgaris and metronidazole was expectedly sensitive to P. acnes, whereas erythromycin and Clindamycin is emerging resistance.
Navigating a Minefield
Authors: SmithBattle Lee , Phengnum Wisitsri , Punsuwun Sasinun 
Published: February 2020

Abstract
Teen mothers have lower rates of breastfeeding duration and exclusivity than older mothers. A growing body of qualitative research on teen mothers' experience helps to explain these disparities. Following a systematic search to identify relevant research, we synthesized the findings from 22 primary studies to conclude that teen mothers navigate a minefield that undermines their intention to breastfeed and their breastfeeding confidence and skill. This metaphorical minefield reflects competing norms for infant feeding and good mothering, as evident in mixed support from teens' social networks; fragmented and stigmatizing healthcare; and spaces that are inhospitable to teen mothers and breastfeeding mothers in general.
In recognition of this minefield, we urge clinicians to: respect teen mothers' infant feeding decisions; develop collaborative relationships based on the principles of patient-centered and strength-based care; challenge stigmatizing healthcare practices; welcome teen mothers and their significant others to clinical settings; and press health systems to fully implement probreastfeeding policies. We also recommend further study to extend our knowledge about teen mothers' breastfeeding experiences.
Illness Insight and Medication Adherence Among Patients With Bipolar Disorder
Authors: Gutiérrez-Rojas Luis , Martínez-Ortega José María , Pérez-Costillas Lucía , Jiménez-Fernández Sara , Carretero María Dolores , Gurpegui Manuel 
Published: February 2020

AbstractThe aim of this study was to investigate the factors associated with illness insight and medication adherence in bipolar disorder (BD). This is a cross-sectional study (with a retrospective evaluation of longitudinal variables) and a secondary analysis of a BD database. The insight of 108 outpatients (age, 48.2 ± 14.1 years, 69% women, 33% euthymic) was measured with three items of the Association of Methodology and Documentation in Psychiatry scale. Their adherence was assessed through patients' and caregivers' reports, plus serum levels. We performed multivariate logistic regression analyses. Full insight was independently and directly associated with adherence, a social support score, and depressive symptoms and inversely associated with intensity of manic symptoms, problems ever with alcohol, and age at onset of the first symptoms. Medication adherence was independently and directly associated with insight, being married, and having had a psychiatric hospitalization and inversely with having suffered a high number of depressive episodes, intensity of manic symptoms, and heavy tobacco smoking.