bluuebunny/crossref_metadata_2025_split huggingface dataset:
Use Of Mandibular Advancement Devices For Obstructive Sleep Apnoea Treatment In Adults
Authors: Chaves Junior Cauby Maia , Dal Fabbro Cibele , Machado Marco Antonio Cardoso , Sales de Bruin Veralice Meireles , Carvalhedo de Bruin Pedro Felipe , Gurgel Marcela Lima , Torgeiro Sonia Maria Guimarães Pereira , Cevidanes Lucia , Haddad Fernanda Louise Martinho , Bittencourt Lia 
Published: August 2017

ABSTRACT
Introduction: This article is based on Clinical Guidelines for obstructive sleep apnoea (OSA) established by a taskforce coordinated by the Brazilian Sleep Association.
Objective: The aim of this article is to evaluate the available scientific evidence regarding the efficacy, adherence and safety of using mandibular advancement devices (MAD) as a therapeutic course for treating obstructive sleep apnoea in adult patients.
Method: Active searches were performed in the PubMed/MEDLINE, EMBASE, Scielo/LILACS and Cochrane Library databases. Methodological aspects were used to rank the levels of evidence according to the criteria of the Centre for Evidence-Based Medicine at Oxford.
Results: Mandibular advancement devices offer the best results for patients with primary snoring, upper airway resistance syndrome and mild or moderate OSA (Levels of Evidence I and II). Patients seem to exhibit greater adherence to oral appliances (MAD) than to continuous positive airway pressure (CPAP) devices, although the latter are more effective in controlling OSA (Level of Evidence I). The long-term side effects most observed after the use of MADs are related to changes in the mandibular and dental positions (Levels of Evidence I and II).

Conclusion: MAD constitute a therapeutic alternative for OSA and promote favourable results with good efficacy and adherence to treatment. Side effects can arise in the short, medium or long term. Patients must be informed about the possible occurrence of these adverse effects, and the orthodontist must be able to manage any side effects that occur due to the use of these devices.
Investigating the Relativistic Motion of the Stars Near the Supermassive Black Hole in the Galactic Center
Authors: Parsa M. , Eckart A. , Shahzamanian B. , Karas V. , Zajaček M. , Zensus J. A. , Straubmeier C. 
Published: August 2017

Abstract
The S-star cluster in the Galactic center allows us to study the physics close to a supermassive black hole, including distinctive dynamical tests of general relativity. Our best estimates for the mass of and the distance to Sgr A* using the three stars with the shortest period (S2, S38, and S55/S0-102) and Newtonian models are M
BH = (4.15 ± 0.13 ± 0.57) × 106
M
⊙ and R
0 = 8.19 ± 0.11 ± 0.34 kpc. Additionally, we aim at a new and practical method to investigate the relativistic orbits of stars in the gravitational field near Sgr A*. We use a first-order post-Newtonian approximation to calculate the stellar orbits with a broad range of periapse distance r

p
. We present a method that employs the changes in orbital elements derived from elliptical fits to different sections of the orbit. These changes are correlated with the relativistic parameter defined as ϒ ≡ r

s
/r

p
(with r

s
being the Schwarzschild radius) and can be used to derive ϒ from observational data. For S2 we find a value of ϒ = 0.00088 ± 0.00080, which is consistent, within the uncertainty, with the expected value of ϒ = 0.00065 derived from M
BH and the orbit of S2. We argue that the derived quantity is unlikely to be dominated by perturbing influences such as noise on the derived stellar positions, field rotation, and drifts in black hole mass.
The Galaxy Count Correlation Function in Redshift Space Revisited
Authors: Campagne J.-E. , Plaszczynski S. , Neveu J. 
Published: August 2017

Abstract
In the near future, cosmology will enter the wide and deep galaxy survey era, enabling high-precision studies of the large-scale structure of the universe in three dimensions. To test cosmological models and determine their parameters accurately, it is necessary to use data with exact theoretical expectations expressed in observational parameter space (angles and redshift). The data-driven, galaxy number count fluctuations on redshift shells can be used to build correlation functions

on and between shells to probe the baryonic acoustic oscillations and distance-redshift distortions, as well as gravitational lensing and other relativistic effects. To obtain a numerical estimation of

from a cosmological model, it is typical to use either a closed form derived from a tripolar spherical expansion or to compute the power spectrum

and perform a Legendre polynomial

expansion. Here, we present a new derivation of a

closed form using the spherical harmonic expansion and proceeding to an infinite sum over multipoles thanks to an addition theorem. We demonstrate that this new expression is perfectly compatible with the existing closed forms but is simpler to establish and manipulate. We provide formulas for the leading density and redshift-space contributions, but also show how Doppler-like and lensing terms can be easily included in this formalism. We have implemented and made publicly available software for computing those correlations efficiently, without any Limber approximation, and validated this software with the CLASSgal code. It is available at https://gitlab.in2p3.fr/campagne/AngPow.
Methanol Formation via Oxygen Insertion Chemistry in Ices
Authors: Bergner Jennifer B. , Öberg Karin I. , Rajappan Mahesh 
Published: August 2017

Abstract
We present experimental constraints on the insertion of oxygen atoms into methane to form methanol in astrophysical ice analogs. In gas-phase and theoretical studies this process has previously been demonstrated to have a very low or nonexistent energy barrier, but the energetics and mechanisms have not yet been characterized in the solid state. We use a deuterium UV lamp filtered by a sapphire window to selectively dissociate O2 within a mixture of O2:CH4 and observe efficient production of CH3OH via O(1D) insertion. CH3OH growth curves are fit with a kinetic model, and we observe no temperature dependence of the reaction rate constant at temperatures below the oxygen desorption temperature of 25 K. Through an analysis of side products we determine the branching ratio of ice-phase oxygen insertion into CH4: ∼65% of insertions lead to CH3OH, with the remainder leading instead to H2CO formation. There is no evidence for CH3 or OH radical formation, indicating that the fragmentation is not an important channel and that insertions typically lead to increased chemical complexity. CH3OH formation from O2 and CH4 diluted in a CO-dominated ice similarly shows no temperature dependence, consistent with expectations that insertion proceeds with a small or nonexistent barrier. Oxygen insertion chemistry in ices should therefore be efficient under low-temperature ISM-like conditions and could provide an important channel to complex organic molecule formation on grain surfaces in cold interstellar regions such as cloud cores and protoplanetary disk midplanes.
La VPC : une révolution sous le signe de la technologie
Authors: Desaegher Caroline , Siouffi Bernard 
Published: August 2017

Dès 1955/60, pour faire face à la fois à la croissance de la demande et aux exigences d’une clientèle qui change, les entreprises leaders de VPC ont dû mettre au rebut leur organisation archaïque. Elles s’intègrent depuis les technologies de pointe, non seulement en matière de gestion des commandes, mais aussi au niveau de l’organisation logistique des stocks et de la fabrication des colis. A partir de 1970, la concurrence s’intensifie au sein du grand commerce ; les entreprises de VPC se doivent alors de développer leurs atouts. Elles continuent pour ce faire de faire appel aux techniques informatiques les plus puissantes, qui optimisent leur capacité à connaître et à fidéliser une clientèle invisible grâce à la personnalisation toujours plus poussée des courriers-clients et des mailings. Leurs stratégies de croissance ne cessent donc de s’appuyer sur des techniques capables de maîtriser et de rentabiliser toujours plus les coûts de prospection de la clientèle et de réalisation des catalogues, ainsi que de réduire toujours plus la contrainte de la distance entre elles et la clientèle. Dans cette optique, elles ont contribué à la création de nouveaux instruments de communication qui, à l’image du Minitel, permettent aux clients d’entrer en contact avec l’entreprise et de passer commande à n’importe quel moment. Ainsi, la “correspondance” et ses contraintes sont de moins en moins représentatives d’une VPC qui se revendique à présent “Vente à Distance”.
Les sciences sociales dans les grandes entreprises américaines des années 1980 : une ressource pour agir sur leur environnement
Authors: Albert-Debarle Aude 
Published: August 2017

Depuis vingt ans, les grandes entreprises américaines ont accru l’embauche de spécialistes de sciences sociales. Cet article analyse le recours aux sciences sociales dans les grandes entreprises américaines pour connaître leur environnement. Il s’agit de comprendre la structure des services où ce recours est fait, leur mode de fonctionnement, la nature des programmes lancés. Les sciences sociales sont utilisées comme une ressource disponible pour élaborer des stratégies face aux pouvoirs publics. Mais, in fine , quelle est la validité d’approches qui empruntent des outils venant des sciences sociales, qui sont menées par des chercheurs de formation, sans toujours avoir la rigueur de la démarche scientifique ?
Reproductive biology and nectar secretion dynamics ofPenstemon gentianoides(Plantaginaceae): a perennial herb with a mixed pollination system?
Authors: Salas-Arcos Lucía , Lara Carlos , Ornelas Juan Francisco 
Published: August 2017

BackgroundIn many plant species, pollination syndromes predict the most effective pollinator. However, other floral visitors may also offer effective pollination services and promote mixed pollination systems. Several species of the species-richPenstemon(Plantaginaceae) exhibit a suite of floral traits that suggest adaptation for pollination by both hymenopterans and hummingbirds. Transitions from the ancestral hymenopteran pollination syndrome to more derived hummingbird pollination syndrome may be promoted if the quantity or quality of visits by hummingbirds is increased and if the ancestral pollinator group performs less efficiently. The quantification of such shifts in pollination systems in the group is still limited. We aimed to investigate floral traits linked to this pollination syndrome inPenstemon gentianoideswith flowers visited by bumblebees and hummingbirds.MethodsWe investigated the floral biology, pollinator assemblages, breeding system and nectar production patterns ofP. gentianoidesinhabiting a temperate montane forest in central Mexico. Pollination experiments were also conducted to assess the pollinator effectiveness of bumblebees and hummingbirds.ResultsP. gentianoidesflowers are protandrous, with 8-d male phase (staminate) flowers, followed by the ∼1–7 d female phase (pistillate phase). Flowers display traits associated with hymenopteran pollination, including purple flowers abruptly ampliate-ventricose to a broad throat with anthers and stigmas included, and long lifespans. However, the nectar available in the morning hours was abundant and dilute, traits linked to flowers with a hummingbird pollination syndrome. Two hummingbird species made most of the visits to flowers,Selasphorus platycercus(30.3% of all visits), followed byArchilochus colubris(11.3%). Bumblebees (Bombus ephippiatus,B. huntiiandB. weisi) accounted for 51.8% of all recorded visits, but their foraging activity was restricted to the warmer hours. Hummingbirds made more foraging bouts and visited more flowers than hymenopteran species. Flowers experimentally pollinated byB. ephippiatusproduced significantly more fruits than those pollinated byS. platycercus. However, there was no statistical difference in the number of seeds produced per fruit when a bumblebee or a hummingbird was the pollinator.ConclusionsWe have shown that bumblebees and hummingbirds visit and pollinateP. gentianoidesflowers. Despite floral traits resembling the hymenoptera pollination syndrome, flowers ofP. gentianoidesoffer characteristic nectar rewards to flowers with a hummingbird pollination syndrome. Although pollination efficiency is higher among flowers visited by hymenoptera, the noteworthy percentage of fruit production and number of seeds per fruit derived from hummingbird pollination highlights the importance of hummingbirds as a functional group of pollinators that might have potential evolutionary consequences to the plants.
Electric and magnetic variations in the near‐Mars environment
Authors: Fowler C. M. , Andersson L. , Halekas J. , Espley J. R. , Mazelle C. , Coughlin E. R. , Ergun R. E. , Andrews D. J. , Connerney J. E. P. , Jakosky B. 
Published: August 2017

AbstractFor the first time at Mars the statistical distribution of (1‐D) electric field wave power in the magnetosphere is presented, along with the distribution of magnetic field wave power, as observed by the Mars Atmosphere and Volatile EvolutioN spacecraft from the first 14.5 months of the mission. Wave power in several different frequency bands was investigated, and the strongest wave powers were observed at the lowest frequencies. The presented statistical studies suggest that the full thermalization of ions within the magnetosheath does not appear to occur, as has been predicted by previous studies. Manual inspection of 140 periapsis passes on the dayside shows that Poynting fluxes (at 2–16 Hz) between ∼10−11 and 10−8 Wm−2 reach the upper ionosphere for all 140 cases. Wave power is not observed in the ionosphere for integrated electron densities greater than 1010.8 cm−2, corresponding to typical depths of 100–200 km. The observations presented support previous suggestions that energy from the Mars‐solar wind interaction can propagate into the upper ionosphere and may provide an ionospheric heating source. Upstream of the shock, the orientation of the solar wind interplanetary magnetic field was shown to significantly affect the statistical distribution of wave power, based on whether the spacecraft was likely magnetically connected to the shock or not—something that is predicted but has not been quantitatively shown at Mars before. In flight performance and caveats of the Langmuir Probe and Waves electric field power spectra are also discussed.
Statistical wave climate projections for coastal impact assessments
Authors: Camus P. , Losada I. J. , Izaguirre C. , Espejo A. , Menéndez M. , Pérez J. 
Published: August 2017

AbstractGlobal multimodel wave climate projections are obtained at 1.0° × 1.0° scale from 30 Coupled Model Intercomparison Project Phase 5 (CMIP5) global circulation model (GCM) realizations. A semi‐supervised weather‐typing approach based on a characterization of the ocean wave generation areas and the historical wave information from the recent GOW2 database are used to train the statistical model. This framework is also applied to obtain high resolution projections of coastal wave climate and coastal impacts as port operability and coastal flooding. Regional projections are estimated using the collection of weather types at spacing of 1.0°. This assumption is feasible because the predictor is defined based on the wave generation area and the classification is guided by the local wave climate. The assessment of future changes in coastal impacts is based on direct downscaling of indicators defined by empirical formulations (total water level for coastal flooding and number of hours per year with overtopping for port operability). Global multimodel projections of the significant wave height and peak period are consistent with changes obtained in previous studies. Statistical confidence of expected changes is obtained due to the large number of GCMs to construct the ensemble. The proposed methodology is proved to be flexible to project wave climate at different spatial scales. Regional changes of additional variables as wave direction or other statistics can be estimated from the future empirical distribution with extreme values restricted to high percentiles (i.e., 95th, 99th percentiles). The statistical framework can also be applied to evaluate regional coastal impacts integrating changes in storminess and sea level rise.
Linear response of field‐aligned currents to the interplanetary electric field
Authors: Weimer D. R. , Edwards T. R. , Olsen Nils 
Published: August 2017

AbstractMany studies that have shown that the ionospheric, polar cap electric potentials (PCEPs) exhibit a “saturation” behavior in response to the level of the driving by the solar wind. As the magnitudes of the interplanetary magnetic field (IMF) and electric field (IEF) increase, the PCEP response is linear at low driving levels, followed with a rollover to a more constant level. While there are several different theoretical explanations for this behavior, so far, no direct observational evidence has existed to confirm any particular model. In most models of this saturation, the interaction of the field‐aligned currents (FACs) with the solar wind/magnetosphere/ionosphere system has a role. As the FACs are more difficult to measure, their behavior in response to the level of the IEF has not been investigated as thoroughly. In order to resolve the question of whether or not the FAC also exhibit saturation, we have processed the magnetic field measurements from the Ørsted, CHAMP, and Swarm missions, spanning more than a decade. As the amount of current in each region needs to be known, a new technique is used to separate and sum the current by region, widely known as R0, R1, and R2. These totals are found separately for the dawnside and duskside. Results indicate that the total FAC has a response to the IEF that is highly linear, continuing to increase well beyond the level at which the electric potentials saturate. The currents within each region have similar behavior.
An Icosidodecahedral Supramolecule Based on Pentaphosphaferrocene: From a Disordered Average Structure to Individual Isomers
Authors: Heindl Claudia , Peresypkina Eugenia , Virovets Alexander V. , Bushmarinov Ivan S. , Medvedev Michael G. , Krämer Barbara , Dittrich Birger , Scheer Manfred 
Published: August 2017

AbstractPentaphosphaferrocenes [CpRFe(η5‐P5)] (1) and CuI halides are excellent building blocks for the formation of discrete supramolecules. Herein, we demonstrate the potential of Cu(CF3SO3) for the construction of the novel 2D polymer [{Cp*Fe(μ4,η5:1:1:1‐P5)}{Cu(CF3SO3)}]n (2) and the unprecedented nanosphere (CH2Cl2)1.4@[{CpBnFe(η5‐P5)}12{Cu(CF3SO3)}19.6] (3). The supramolecule 3 has a unique scaffold beyond the fullerene topology, with 20 copper atoms statistically distributed over the 30 vertices of an icosidodecahedron. Combinatorics was used to interpret the average disordered structure of the supramolecules. In this case, only two pairs of enantiomers with D5 and D2 symmetry are possible for bidentate bridging coordination of the triflate ligands. DFT calculations showed that differences in the energies of the isomers are negligible. The benzyl ligands enhance the solubility of 3, enabling NMR‐spectroscopic and mass‐spectrometric investigations.
Biodegradable baked foam made with chayotextle starch mixed with plantain flour and wood fiber
Authors: Vargas‐Torres Apolonio , Palma‐Rodriguez Heidi Maria , Berrios Jose De J. , Glenn Gregory , Salgado‐Delgado Rene , Olarte‐Paredes Alfredo , Prieto‐Mendez Judith , Hernandez‐Uribe Juan Pablo 
Published: August 2017

ABSTRACTNew renewable materials are needed to reduce petroleum‐based plastic packaging. The effect of plantain flour (PF) and wood fiber (WF) on the properties of starch‐based foams (SBFs) were investigated. The SBFs were characterized using physical, thermal, and mechanical methods to better understand the relationship between PF and WF concentration. Contact angle values showed that the addition of WF or PF increased the hydrophobic character of the SBFs. Also, the addition of PF increased the heat transfer resistance and density of the foams, while their solubility decreased. The values of tensile strength and Young's modulus increased with increasing concentrations of PF in the SBFs. However, the addition of PF and WF promoted a decrease on the elongation at break of the SBFs. An increase in concentration of PF also showed a decrease in water vapor permeability, and an increase in the thickness of the cell wall layer of the SBFs. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2017,134, 45565.
Enhancing electrochemical performance of Fe3O4/graphene hybrid aerogel with hydrophilic polymer
Authors: Zhan Yanhu , Meng Yanyan , Yan Ning , Li Yuchao , Wei Denghu , Tao Xuquan 
Published: August 2017

ABSTRACTGraphene hybrid aerogels have attracted attention as electrode materials because of their unique porous architectures. However, their electrochemical performance is limited by the intrinsic hydrophobicity and the ease of aggregation of graphene nanosheets. We demonstrate a unique methodology to produce graphene hybrid aerogels through assembly of graphene nanosheets, nanometer‐scale ferroferric oxide (Fe3O4), and hydrophilic poly(vinyl alcohol) (PVA) into three‐dimensional hierarchical macrostructures. Electrochemical performance measurements exhibit a significant improvement in the specific capacitance of this ternary hybrid aerogel with remarkable cycling stability. Specifically, the specific capacitance is nearly 6.6 times higher than that of the neat graphene aerogel, and a cycling capacitance retention rate of 99% was achieved after 2000 cycles at a high current density of 0.5 A g−1. Electrochemical impedance spectroscopy measurements demonstrate a lower resistance in the Fe3O4/graphene/PVA aerogel electrode compared with that of both neat graphene and Fe3O4/graphene aerogel electrodes. The obtained graphene hybrid aerogels with outstanding cycling performance and high energy density are very promising as electrode materials for supercapacitors. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45566.
A new inhibitor of P(AM‐DMDAAC)/PVA intermacromolecular complex for shale in drilling fluids
Authors: Jiang Guancheng , Zhang Xianmin , Dong Tengfei , Xuan Yang , Wang Le , Jiang Qihui 
Published: August 2017

ABSTRACTA new poly(acrylamide‐dimethyldiallyammonium chloride)/poly(vinyl alcohol) [P(AM‐DMDAAC)/PVA, ADVA] intermacromolecular complex inhibitor of shale‐hydrated swelling was studied for its ability to counter well instability. ADVA exhibited excellent inhibitory performance, and the probable inhibition mechanism was determined. The hydrophilic groups in ADVA adsorbed to montmorillonite (MMT) through hydrogen bonding and cation exchange, and the hydrophobic groups isolated water from MMT. ADVA adhered to the MMT and entered the interlayer instead of water due to the PVA structure. ADVA could also form a thin film and reduce the hydrophilic property of the shale core to prevent water from contacting the shale formation. With the structure of poly(acrylamide‐dimethyldiallyammonium chloride) (AD), the complex adsorbed and bridged MMT to reduce the filtration loss of the basic mud after hot‐rolling. This prevented contact of free water from drilling fluids with the shale formation during the drilling process. With these properties, ADVA demonstrated potential application as an inhibitor for use in drilling fluids. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45584.