bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of zeolites on hydration process of mineral binders
Authors: Małolepszy Jan , Grabowska Ewelina 
Published: September 2020

This paper presents the results of physical and chemical properties of zeolite - clinoptilolite (Z), on the basis of which its usefulness in different terms and applications was assessed. Same pozzolan was also investigated and analyzed in term of the changes that it causes in the system pozzolan - cement – lime - sand - water with different content of ingredients. In order to identify the hydration products in the natural conditions, infusion (80ºC) and autoclaving (180°C) XRD, DTA / TG and SEM was used. The results indicate that clinoptilolite is characterized by moderate pozzolanic activity and can be successfully used as a pozzolanic additive for cement, and a binder in the production of aerated concrete.
Results of concrete absorption test related to some particular factors
Authors: Wawrzeńczyk Jerzy 
Published: September 2020

In spite of the fact that common concrete absorption tests are technically simple, the correctness of received results is still very disputable. The lack of unequivocal procedures makes it impossible to compare the results obtained in various laboratories. The paper presents the research results received in 5 series of concrete with three different cements and various w/c ratios. The investigations were conducted on cube specimens with dimensions of 10cm and 15cm, all cubes were soaked and dryed in long terms. The object of the research was to identify the effect of specimens dimensions and soaking time on the concrete absorption. Soaking time applied to investigations vastly exeeds the common soaking time described in standards concerning precast concrete elements.
The evaluation of uncertainty in the resistance models of reinforced concrete members
Authors: Woliński Szczepan 
Published: September 2020

The paper presents the analysis and evaluation methods of uncertainty in the resistance models of reinforced concrete members. The first method is based on a standardized procedure for the calibration of resistance models given in the Eurocode. The second method is an original proposal for the evaluation of uncertainty in the resistance models using the available test data on resistance variation. According to the concept of semi-probabilistic partial factors design, the partial factor resulting from model uncertainty, separated from the factor of resistance, represents a measure of model uncertainty. The approach to model uncertainty evaluation is demonstrated with the use two different sample models for shear capacity assessment of reinforced concrete beams.
Prevalência da hipertensão arterial sistêmica em crianças da rede pública estadual de ensino de Carmo do Cajuru-MG
Authors: Da Silva Valéria Aparecida , Nogueira Rabelo Tatiane , De Rezende e Silva Fernanda Marcelino , Nogueira Quadros Karla Amaral , Consolação dos Santos Regina , Nunes Andrade Silmara 
Published: September 2020

Objetivo: Analisar estudantes dos sextos anos das escolas públicas estaduais do municí­pio de Carmo do Cajuru/MG com o intuito de identificar aqueles com predisposição e prevalência í Hipertensão Arterial Sistêmica. Método: Pesquisa quantitativa, descritiva, de delineamento transversal. Foi utilizado questionário estruturado destinados aos pais ou responsáveis legais pelas crianças, bem como a realização de medidas antropométricas e aferição da pressão arterial. As variáveis de interesse foram analisadas e apresentadas utilizando a estatí­stica descritiva, média, frequência absoluta e porcentagem. Resultados: A amostra estudada contou com a participação de 119 (64 meninas e 53 meninos) das quais 65,5% com 11 anos e 33,9% com 12 anos. Com relação í média da pressão arterial 100% dos meninos e 93,7% das meninas dispuseram dentro dos limites normais. Conclusão: A partir da realização deste estudo, vemos que se fazem necessárias reflexões sobre agentes considerados como fatores de risco para o desenvolvimento da hipertensão.
A Dirac-type Theorem for Berge Cycles in Random Hypergraphs
Authors: Clemens Dennis , Ehrenmüller Julia , Person Yury 
Published: September 2020

A Hamilton Berge cycle of a hypergraph on $n$ vertices is an alternating sequence $(v_1, e_1, v_2, \ldots, v_n, e_n)$ of distinct vertices $v_1, \ldots, v_n$ and distinct hyperedges $e_1, \ldots, e_n$ such that $\{v_1,v_n\}\subseteq e_n$ and $\{v_i, v_{i+1}\} \subseteq e_i$ for every $i\in [n-1]$. We prove the following Dirac-type theorem about Berge cycles in the binomial random $r$-uniform hypergraph $H^{(r)}(n,p)$: for every integer $r \geq 3$, every real $\gamma>0$ and $p \geq \frac{\ln^{17r} n}{n^{r-1}}$ asymptotically almost surely, every spanning subgraph $H \subseteq H^{(r)}(n,p)$ with minimum vertex degree $\delta_1(H) \geq \left(\frac{1}{2^{r-1}} + \gamma\right) p \binom{n}{r-1}$ contains a Hamilton Berge cycle. The minimum degree condition is asymptotically tight and the bound on $p$ is optimal up to some polylogarithmic factor.
In Vitro Evaluation of Antioxidant Activity of Homeopathic Mother Tincture and Total Phenolic Content
Authors: Shaffique Shifa , Anwer Haseeb , Asif Hafiz Muhammad , Akram Muhammad , Rehman Anila , Ahmed Saeed , Ahmed Khalil 
Published: September 2020

Background: Antioxidants are those compounds which scavengers the free radicals, widely used in health protection and prescribed on large scale in biomedical health care units. In homeopathic system of medicine mother tinctures are prescribed. Mother tinctures of medicinal plants are having the potential to treat the various acute and chronic ailments.
Objectives: The present study was accompanied to determine the total phenolic content and the antioxidant activity of homeopathic mother tincture of plant origin i.e. Baptisia tinctoria, Berberis aquifolium, Echinacea angustifolia, Hydrangea arborescens, Hydrastis canadensis, Kreosotum, and Thuja occidentalis in comparison with ascorbic acid.
Methods: Antioxidant activity was evaluated by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) inhibition assay method. A volume of 0.1 mM solution of DPPH was used while mother tinctures (1.25, 5, 2.5 μl volumes) were used for evaluation of antioxidant activity. Ascorbic acid was taken as a standard control and alcohol as negative control in antioxidant activity protocol. Total phenolic content was measured by Folin–Ciocalteu reagent assay. Total phenolic content of mother tinctures was measured in comparison with ascorbic acid.
Results: All tested homeopathic mother tinctures of plant origin showed significant antioxidant potential except Hydrangea arborescens and Kreosotum. Alcohol which was used as negative control exhibited no antioxidant activity. Pulsatilla nigricans possess highest antioxidant potential 85±0.3 among other tested mother tinctures against DPPH free radical and 98.8±2 maximum no of phenolic contents.
Conclusion: Homeopathic Mother Tinctures of plant origin showed antioxidant activity due to presence of phenolic content.
Anti-Epileptic Potential of Ziziphus Vulgaris and Ferula Asafoetida Extracts in Drug Induced Seizure Models of Experimental Mice
Authors: Anwar Nadia , Khan Mahtab Ahmad , Bukhari Mehwish , Ahmed Hammad , Zaidi Awais Ali , Arshad Haroon 
Published: September 2020

Background: Ziziphus vulgaris (ZV) and Ferula asafoetida (FA) have phenolic compounds with potential anti-epileptic activity.
Objective: This study was aimed to investigate the anti-epileptic potential of hydroalcoholic (30:70) crude extracts of ZV and FA.
Methods: Different doses (5 mg/ml, 15 mg/ml, 25 mg/ml) of extracts from ZV and FA were separately administered intraperitoneally to groups (7/group) of male albino mice (20-30 g). Phenytoin (15 mg/ml, intraperitoneal) was used as positive control. After 30 min, tonic-clonic seizures were induced by intraperitoneal administration of picrotoxin (6 mg/ml) and strychnine (4 mg/ml) in separate groups. Animals were monitored for 1 h and different parameters including onset and frequency of seizures and protection (against mortality & seizures) were determined.
Results: A dose dependent significant delay in onset and decrease in seizure frequency as well as mortality was observed in animals treated with plant extracts (ZV and FA). Positive control (phenytoin) also showed significant delay in seizure onset and decreased the seizure frequency.
Conclusion: The plant extracts (ZV and FA) contain the phenolic compounds which may induce the GABAergic transmission that could be the most probable mechanism for their anti-epileptic activity. Molecular studies and histopathological analysis are required to elucidate the exact anti-epileptic mechanisms of ZV and FA extracts.
Mirror-wave Structures in the Solar Wind: Grad–Shafranov Reconstruction, MHD, and Hall MHD Simulations with Double-polytropic Energy Closures
Authors: Hau L.-N. , Chang C.-K. , Chen G.-W. 
Published: September 2020

Abstract
Mirror-mode waves with anticorrelated density and magnetic field are widely observed in the solar wind and planetary magnetospheres. In this study we analyze the characteristics of three mirror-wave events observed by the Magnetospheric Multiscale Mission in the Earth’s magnetosheath based on the Grad–Shafranov (GS) reconstruction model with temperature anisotropy. The GS scheme solves steady, two-dimensional MHD equations with field-aligned flow from the plasma and magnetic field measurements taken by a single spacecraft traversing across a coherent field structure. The reconstructed 2D plasma and field maps are obtained in the de Hoffmann–Teller frame and on the plane perpendicular to the invariant axis. The energy closures are a set of empirical energy laws with two polytropic exponents inferred from the observed mirror events which are in the ranges of

and

. It is shown that the mirror waves are nonpropagating with linear magnetic field polarization and possess anticorrelated density, temperatures, and magnetic field with the widths of 10–40 ion inertial lengths. The double-polytropic MHD and Hall MHD simulations of mirror instability show consistent results with the GS reconstructions in terms of field-line geometry, phase relations and the sizes of mirror waves, etc.
Solar Wind Turbulence from 1 to 45 au. III. Anisotropy of Magnetic Fluctuations in the Inertial Range Using Voyager and ACE Observations
Authors: Pine Zackary B. , Smith Charles W. , Hollick Sophia J. , Argall Matthew R. , Vasquez Bernard J. , Isenberg Philip A. , Schwadron Nathan A. , Joyce Colin J. , Sokół Justyna M. , Bzowski Maciej , Kubiak Marzena A. , Hamilton Kathleen E. , McLaurin Megan L. , Leamon Robert J. 
Published: September 2020

Abstract
We examine both Voyager and Advanced Composition Explorer magnetic field measurements at frequencies that characterize the inertial range and evaluate the anisotropy of the fluctuations as they relate to both the compressive component and underlying wavevector anisotropy of the turbulence. The magnetic fluctuation anisotropy as it relates to the compressive component is directly dependent upon both the plasma beta of the thermal proton component and the ratio of magnetic fluctuation magnitude to the strength of the mean magnetic field. This has been seen before at 1 au. The magnetic fluctuation anisotropy in the plane perpendicular to the mean magnetic field, which is a measure of the anisotropy of the underlying wavevector distribution, should depend on the angle between the mean magnetic field and the radial direction and should be confined to values between one and the index of the power spectrum, which is typically 5/3. Our results show that the average of this anisotropy exceeds the value of the spectral index and is out of bounds with the theory. Although the results are suggestive of past analyses, we find that spherical expansion of the turbulence may offer at least a partial explanation of the apparent amplification of this measured anisotropy.
Solar Wind Turbulence from 1 to 45 au. IV. Turbulent Transport and Heating of the Solar Wind Using Voyager Observations
Authors: Pine Zackary B. , Smith Charles W. , Hollick Sophia J. , Argall Matthew R. , Vasquez Bernard J. , Isenberg Philip A. , Schwadron Nathan A. , Joyce Colin J. , Sokół Justyna M. , Bzowski Maciej , Kubiak Marzena A. , McLaurin Megan L. 
Published: September 2020

Abstract
We adopt the theory for turbulent transport of energy by solar wind fluctuations and apply that theory to observations by the Voyager 1 and 2 spacecraft to obtain rates of thermal proton heating that are controlled by two sources: the large-scale fluctuations in the solar wind that arise from solar sources and the excitation of waves by newborn interstellar ions. In the process, we compute magnetic spectra for 839 data intervals spanning the range from 1 to 35 au when thermal ion data is available and use those spectra to obtain independent estimates for the energy cascade rates at intermediate scales that we assume equals the rate of thermal proton heating by the turbulence. We compare three analyses that describe different aspects of the solar wind heating problem: the rate of energy cascade through the intermediate scales of the magnetic spectrum, the rate at which energy is supplied to that cascade from the large-scale fluctuations as described by magnetohydrodynamic transport theory, and the rate at which energy is injected into the spectrum via wave excitation by newborn interstellar ions. The first two expressions are found to be in good agreement while the latter source dynamics become important beyond 10 au.
Understanding FRB 200428 in the Synchrotron Maser Shock Model: Consistency and Possible Challenge
Authors: Wu Q. , Zhang G. Q. , Wang F. Y. , Dai Z. G. 
Published: September 2020

Abstract
Recently, the discovery of Galactic FRB 200428 associated with an X-ray burst (XRB) of SGR 1935+2154 has built a bridge between FRBs and magnetar activities. In this Letter, we assume that the XRB occurs in the magnetar magnetosphere. We show that the observational properties of FRB 200428 and the associated XRB are consistent with the predictions of synchrotron maser emission at ultrarelativistic magnetized shocks, including radiation efficiency, similar energy occurrence frequency distributions, and simultaneous arrive times. It requires that the upstream medium is a mildly relativistic baryonic shell ejected by a previous flare. The energy injection by flares responsible for the radio bursts will produce a magnetar wind nebula, which has been used to explain the persistent radio source associated with FRB 121102. We find that the radio continuum around SGR 1935+2154 can be well understood in the magnetar wind nebula model, by assuming the same energy injection rate

as FRB 121102. The required baryonic mass is also estimated form the observations of FRB 121102 by the Green Bank Telescope and the Five-hundred-meter Aperture Spherical Telescope. By assuming the same radiation efficiency

, the total baryonic mass ejected from the central magnetar is about 0.005 solar mass. This value is much larger than the typical mass of a magnetar outer crust, but is comparable to the total mass of a magnetar crust.
’Oumuamua as a Cometary Fractal Aggregate: The “Dust Bunny” Model
Authors: Luu Jane X. , Flekkøy Eirik G. , Toussaint Renaud 
Published: September 2020

Abstract
The first known interstellar object, 1I/2017 U1 ’Oumuamua, displayed such unusual properties that its origin remains a subject of much debate. We propose that ’Oumuamua’s properties could be explained as those of a fractal dust aggregate (a “dust bunny”) formed in the inner coma of a fragmenting exo-Oort cloud comet. Such fragments could serve as accretion sites by accumulating dust particles, resulting in the formation of a fractal aggregate. The fractal aggregate eventually breaks off from the fragment due to hydrodynamic stress. With their low density and tenuously bound orbits, most of these cometary fractal aggregates are then ejected into interstellar space by radiation pressure.
Changes in a Dusty Ringlet in the Cassini Division after 2010
Authors: Hedman Mathew , Bridges Bill 
Published: September 2020

Abstract
A dusty ringlet designated R/2006 S3, also known as the “Charming Ringlet,” is located around 119,940 km from the center of Saturn within the Laplace Gap in the Cassini Division. Prior to 2010, the ringlet had a simple radial profile and a predictable eccentric shape with two components, one forced by solar radiation pressure and the other freely precessing around the planet. However, observations made by the Cassini spacecraft since late 2012 revealed a shelf of material extending inwards from the ringlet that was not present in the earlier observations. Closer inspection of images obtained after 2012 shows that sometime between 2010 and 2012, the freely precessing component of the ringlet’s eccentricity increased by over 50%, and that for at least 3 yr after 2012, the ringlet had longitudinal brightness variations that rotated around the planet at a range of rates corresponding to ∼60 km in orbital semimajor axis. Some event therefore disturbed this ringlet between 2010 and late 2012.
From Grain Merchants to Millers: The Kims of Seoul and the Origins of Korean Capitalism
Authors: Hong Sung-Chan , Lee Jong Hwa , Kim Mi Lim 
Published: September 2020

Les marchands Kim étaient une famille de courtiers ( gaekju ) opérant dans la zone de Dongmak à Séoul près de la rivière Han. Cet article examine l’établissement et l’exploitation de l’usine de riz Dongil ( 東一 ) de la famille Kim, qui utilisait un moteur à essence ou un moteur électrique, des engrenages de transmission et des systèmes en fonctionnement depuis 1910. La préparation du riz était une industrie manufacturière où se lancèrent de nombreux investisseurs coréens durant la période du Hanmal et au début de la période coloniale. En s’appuyant sur les livres de comptes de la famille Kim, cet article examine l’espace et les installations de l’usine de riz Dongil, l’achat et la transformation des matières premières (riz non décortiqué et le riz non poli brun), la vente de produits (riz brun ou riz blanc), l’emploi et les salaires, les transactions bancaires, l’utilisation de capital et les opérations quotidiennes dans les années 1910. L’analyse de cette information montrera la transformation des commerçants coréens et des courtiers en bourgeoisie et la conversion du capital commercial en capital industriel. En d’autres termes, cet article montre les origines internes et la nature continue du capitalisme coréen.
Reste à charge et équité du système de santé : le cas du Tadjikistan
Authors: Pellet Sandra 
Published: September 2020

Cet article vise à mesurer les inégalités d’accès et de financement d’un système de santé à fort reste à charge. Malgré l’universalité de son système, le Tadjikistan affiche des taux de reste à charge parmi les plus hauts du monde, de 60 % à 80 % des dépenses ces dix dernières années. À partir des données issues du Tajikistan Living Standards Survey 2007 et de la méthodologie des indices de concentration, nous suggérons que l’accès aux soins n’est pas équitablement réparti dans la population et que les dépenses de santé sont régressives. Les paiements informels reconstruits après contrôle des différences de besoin sont eux aussi régressifs, ce qui invalide l’hypothèse selon laquelle les médecins redistribuent.
La « fraude sociale » en questions
Authors: Dubois Vincent , Lieutaud Marion 
Published: September 2020

Cet article vise à rendre compte d’une évolution rigoriste dans les débats politiques sur les questions sociales et d’emploi, consistant plus précisément à promouvoir un contrôle plus strict des bénéficiaires d’aides sociales. Il repose sur l’analyse des questions parlementaires à l’Assemblée nationale, de 1986 à 2017 (n = 1 108). Rares, voire inexistantes, au début de la période, les questions sur les abus dont se rendraient coupables les bénéficiaires de prestations sociales et les modalités de leur contrôle ont augmenté jusqu’à devenir une thématique à part entière du débat politique. L’évolution de leur formulation révèle un durcissement progressif des prises de position, plus particulièrement à l’égard des fractions les plus démunies de l’espace social, et un affaiblissement concomitant des discours critiques à l’égard de telles tendances. On s’interroge en conclusion sur la manière dont la naturalisation de cette thématique dans les débats politiques a pu accompagner le renforcement des dispositifs de contrôle des « assistés ».
Des coalitions au consensus politique ambigu : aux origines du revenu minimum au Brésil
Authors: Tomazini Carla 
Published: September 2020

L’ambiguïté est aujourd’hui une variable indispensable à la compréhension des mécanismes de « mise en consensus » dans l’adoption des politiques publiques. De plus en plus utilisée pour l’analyse de l’action publique, la notion de « consensus ambigu » peut cependant perdre sa valeur analytique dès lors qu’elle recoupe des catégories opposées (tantôt les alliances et les accords, tantôt les oppositions et les désaccords profonds). Si l’ambiguïté ne se réduit pas à un simple dépassement des clivages partisans, que révèle-t-elle de singulier quant à la dynamique partisane ? Et comment le Politics participe-t-il de la mise en consensus des Policies ? En analysant la fabrique du revenu minimum au Brésil dans les années 1990, l’hypothèse développée ici est que « l’ambiguïté consensuelle » opère à trois niveaux distincts : à un niveau axiologique, au niveau des clivages partisans et à celui des stratégies électorales. L’article propose de suivre le processus complexe de mise en place de programmes de revenu minimum dont le fameux programme Bolsa Família, instauré en 2004, est une des résultantes.
PIK3IP1 Promotes Extrafollicular Class Switching in T-Dependent Immune Responses
Authors: Ottens Kristina , Schneider Jalyn , Kane Lawrence P. , Satterthwaite Anne B. 
Published: September 2020

Abstract
PI3K plays multiple roles throughout the life of a B cell. As such, its signaling is tightly regulated. The importance of this is illustrated by the fact that both loss- and gain-of-function mutations in PI3K can cause immunodeficiency in humans. PIK3IP1, also known as TrIP, is a transmembrane protein that has been shown to inhibit PI3K in T cells. Results from the ImmGen Consortium indicate that PIK3IP1 expression fluctuates throughout B cell development in a manner inversely correlated with PI3K activity; however, its role in B cells is poorly understood. In this study, we define the consequences of B cell–specific deletion of PIK3IP1. B cell development, basal Ig levels, and T-independent responses were unaffected by loss of PIK3IP1. However, there was a significant delay in the production of IgG during T-dependent responses, and secondary responses were impaired. This is likely due to a role for PIK3IP1 in the extrafollicular response because germinal center formation and affinity maturation were normal, and PIK3IP1 is not appreciably expressed in germinal center B cells. Consistent with a role early in the response, PIK3IP1 was downregulated at late time points after B cell activation, in a manner dependent on PI3K. Increased activation of the PI3K pathway was observed in PIK3IP1-deficient B cells in response to engagement of both the BCR and CD40 or strong cross-linking of CD40 alone. Taken together, these observations suggest that PIK3IP1 promotes extrafollicular responses by limiting PI3K signaling during initial interactions between B and T cells.