bluuebunny/crossref_metadata_2025_split huggingface dataset:
Longitudinal impairment of lung function in school‐age children with extremely low birth weights
Authors: Hirata Katsuya , Nishihara Masahiro , Kimura Takeshi , Shiraishi Jun , Hirano Shinya , Kitajima Hiroyuki , Fujimura Masanori 
Published: January 2017

AbstractOBJECTIVESTo assess lung function and long‐term respiratory outcomes in extremely low birth weight (ELBW) survivors.WORKING HYPOTHESISELBW, especially with respiratory complications in the neonatal period, affects lung function at a later age.STUDY DESIGNLongitudinal retrospective study.PATIENT‐SUBJECT SELECTIONLung function was evaluated in 89 ELBW survivors (at ages 8 and 12) with or without a history of bronchopulmonary dysplasia (BPD) or a bubbly/cystic lung appearance in the neonatal period.METHODOLOGYFVC, FEV1, FEF50, and FEF75 were measured using spirometry. Two‐way repeated‐measures ANOVA was used to compare lung function and deterioration time course from 8 to 12 years of age.RESULTSLung function variables were significantly and positively correlated between 8 and 12 years: %FVC (R2 = 0.558), %FEV1 (R2 = 0.539), %FEF50 (R2 = 0.412), and %FEF75 (R2 = 0.429). Lung function values were lower than Japanese reference values, especially in children with a history of severe BPD or a bubbly/cystic appearance. %FEV1 and FEV1/FVC ratio worsened from 8 to 12 years of age: 83.0 ± 17.0% versus 76.6 ± 17.8% (mean difference, 95%CI: −6.43, −9.10 to −3.75) and 84.0 ± 10.1% versus 78.2 ± 13.4% (mean difference, 95%CI: −5.82, −8.56 to −3.08), regardless of whether or not there was a history of neonatal respiratory disease.CONCLUSIONSIn ELBW survivors, the obstructive pattern of lung function impairment deteriorated from 8 to 12 years of age, independent of the presence of severe BPD or bubbly/cystic appearance in the neonatal period.
Chest physiotherapy can affect the lung clearance index in cystic fibrosis patients
Authors: Grosse‐Onnebrink Joerg , Mellies Uwe , Olivier Margarete , Werner Claudius , Stehling Florian 
Published: January 2017

AbstractOBJECTIVESThe lung clearance index (LCI) is determined by multiple‐breath washout lung function (MBW). It is increasingly used as an endpoint in clinical trials. Chest physiotherapy (CP) is part of routine cystic fibrosis (CF) care. Whether the LCI is useful in detecting short‐term treatment effects of CP has not been sufficiently investigated. We assessed the short‐term influence of CP with highly standardized high‐frequency chest wall oscillation (HFCWO) on the LCI in CF patients.METHODSIn this randomized controlled study, the LCI was obtained in 20 CF patients (7‐34 years) hospitalized for infective pulmonary exacerbation prior to and immediately after a single treatment of HFCWO. Twenty‐one control group CF patients (7‐51 years) received no treatment. We calculated the coefficient of repeatability (CR) to estimate the clinical relevance of possible treatment effects.RESULTSHFCWO improved (ie, decreased) the LCI by a median of 0.9 (range −0.45; 3.47; P = 0.002); the LCI decreased in 15 of 20 intervention group patients. In five patients the decrease in LCI exceeded the CR (2.15), indicating a clinically relevant treatment effect; in five patients the LCI increased but did not exceed the CR. The LCI did not change significantly in the control group patients.CONCLUSIONSHFCWO can have a short‐term decreasing effect on the LCI, but the treatment response is heterogeneous. In future trials using LCI as an endpoint, the timing of CP in relation to MBW should be considered a possible bias.
Academic time during college: Associations with mood, tiredness, and binge drinking across days and semesters
Authors: Greene Kaylin M. , Maggs Jennifer L. 
Published: January 2017

ABSTRACTThe current study examined the amount of time American college students spent on academics and explored whether functioning indicators (i.e., positive affect, negative affect, tiredness, and binge drinking) rose and fell with academic time across days and semesters. College students (N= 735) were followed longitudinally and completed 14 daily diaries within each of 7 semesters (N= 56,699 days). The results revealed that academic time decreased slightly during the middle semesters and then increased in later semesters. Furthermore, on days when students spent more time on academics, they reported less positive affect, more tiredness, and less binge drinking; however, the strength and direction of associations depended on the analysis level and whether it was a weekend. Positive affect, for instance, was inversely associated with academics across days, but the reverse was true across semesters. These results emphasize the importance of considering the temporal context in research on adolescent and young adult time use.
On reduced models for gravity waves generated by moving bodies
Authors: Trinh Philippe H. 
Published: January 2017

In 1983, Tulin published a report proposing a framework for reducing the equations for gravity waves generated by moving bodies into a single nonlinear differential equation solvable in closed form (Proceedings of the 14th Symposium on Naval Hydrodynamics, 1983, pp. 19–51). Several new and puzzling issues were highlighted by Tulin, notably the existence of weak and strong wave-making regimes, and the paradoxical fact that the theory seemed to be applicable to flows at low speeds, ‘but not too low speeds’. These important issues were left unanswered, and despite the novelty of the ideas, Tulin’s report fell into relative obscurity. Now, 30 years later, we will revive Tulin’s observations, and explain how an asymptotically consistent framework allows us to address these concerns. Most notably, we demonstrate, using the asymptotic method of steepest descents, how the production of free-surface waves can be related to the arrangement of integration contours connected to the shape of the moving body. This approach provides a new and powerful methodology for the study of geometrically nonlinear wave–body interactions.
Experimental study of oscillating-grid turbulence interacting with a solid boundary
Authors: McCorquodale Mark W. , Munro R. J. 
Published: January 2017

The interaction between oscillating-grid turbulence and a solid, impermeable boundary (positioned below, and aligned parallel to, the grid) is studied experimentally. Instantaneous velocity measurements, obtained using two-dimensional particle imaging velocimetry in the vertical plane through the centre of the (horizontal) grid, are used to study the effect of the boundary on the root-mean-square velocity components, the vertical flux of turbulent kinetic energy (TKE) and the terms in the Reynolds stress transport equation. Identified as a critical aspect of the interaction is the blocking of a vertical flux of TKE across the boundary-affected region. Terms of the Reynolds stress transport equations show that the blocking of this energy flux acts to increase the boundary-tangential turbulent velocity component, relative to the far-field trend, but not the boundary-normal velocity component. The results are compared with previous studies of the interaction between zero-mean-shear turbulence and a solid boundary. In particular, the data reported here are in support of viscous and ‘return-to-isotropy’ mechanisms governing the intercomponent energy transfer previously proposed, respectively, by Perot & Moin (J. Fluid Mech., vol. 295, 1995, pp. 199–227) and Walkeret al.(J. Fluid Mech., vol. 320, 1996, pp. 19–51), although we note that these mechanisms are not independent of the blocking of energy flux and draw parallels to the related model proposed by Magnaudet (J. Fluid Mech., vol. 484, 2003, pp. 167–196).
Viscoplastic boundary layers
Authors: Balmforth N. J. , Craster R. V. , Hewitt D. R. , Hormozi S. , Maleki A. 
Published: January 2017

In the limit of a large yield stress, or equivalently at the initiation of motion, viscoplastic flows can develop narrow boundary layers that provide either surfaces of failure between rigid plugs, the lubrication between a plugged flow and a wall or buffers for regions of predominantly plastic deformation. Oldroyd (Proc. Camb. Phil. Soc., vol. 43, 1947, pp. 383–395) presented the first theoretical discussion of these viscoplastic boundary layers, offering an asymptotic reduction of the governing equations and a discussion of some model flow problems. However, the complicated nonlinear form of Oldroyd’s boundary-layer equations has evidently precluded further discussion of them. In the current paper, we revisit Oldroyd’s viscoplastic boundary-layer analysis and his canonical examples of a jet-like intrusion and flow past a thin plate. We also consider flow down channels with either sudden expansions or wavy walls. In all these examples, we verify that viscoplastic boundary layers form as envisioned by Oldroyd. For each example, we extract the dependence of the boundary-layer thickness and flow profiles on the dimensionless yield-stress parameter (Bingham number). We find that, while Oldroyd’s boundary-layer theory applies to free viscoplastic shear layers, it does not apply when the boundary layer is adjacent to a wall, as has been observed previously for two-dimensional flow around circular obstructions. Instead, the boundary-layer thickness scales in a different fashion with the Bingham number, as suggested by classical solutions for plane-parallel flows, lubrication theory and, for flow around a plate, by Piau (J. Non-Newtonian Fluid Mech., vol. 102, 2002, pp. 193–218); we rationalize this second scaling and provide an alternative boundary-layer theory.
Equilibrium radial positions of neutrally buoyant spherical particles over the circular cross-section in Poiseuille flow
Authors: Morita Yusuke , Itano Tomoaki , Sugihara-Seki Masako 
Published: January 2017

An experimental study of the inertial migration of neutrally buoyant spherical particles suspended in the Poiseuille flow through circular tubes has been conducted at Reynolds numbers $(Re)$ from 100 to 1100 for particle-to-tube diameter ratios of ${\sim}$0.1. The distributions of particles in the tube cross-section were measured at various distances from the tube inlet and the radial probability function of particles was calculated. At relatively high $Re$, the radial probability function was found to have two peaks, corresponding to the so-called Segre–Silberberg annulus and the inner annulus, the latter of which was first reported experimentally by Matas et al. (J. Fluid Mech. vol. 515, 2004, pp. 171–195) to represent accumulation of particles at smaller radial positions than the Segre–Silberberg annulus. They assumed that the inner annulus would be an equilibrium position of particles, where the resultant lateral force on the particles disappears, similar to the Segre–Silberberg annulus. The present experimental study showed that the fraction of particles observed on the Segre–Silberberg annulus increased and the fraction on the inner annulus decreased further downstream, accompanying an outward shift of the inner annulus towards the Segre–Silberberg annulus and a decrease in its width. These results suggested that if the tubes were long enough, the inner annulus would disappear such that all particles would be focused on the Segre–Silberberg annulus for $Re<1000$. At the cross-section nearest to the tube inlet, particles were absent in the peripheral region close to the tube wall including the expected Segre–Silberberg annulus position for $Re>700$. In addition, the entry length after which radial migration has fully developed was found to increase with increasing $Re$, in contrast to the conventional estimate. These results may be related to the developing flow in the tube entrance region where the radial force profile would be different from that of the fully developed Poiseuille flow and there may not be an equilibrium position corresponding to the Segre–Silberberg annulus.
Postprandial glycaemic response to berry nectars containing inverted sucrose
Authors: Törrönen Riitta , Hellström Jarkko , Mattila Pirjo , Kilpi Kyllikki 
Published: January 2017

AbstractSucrose is commonly used for sweetening berry products. During processing and storage of berry products containing added sucrose, sucrose is inverted to glucose and fructose. We have previously shown that postprandial glycaemic response induced by intact sucrose is attenuated when sucrose is consumed with berries rich in polyphenols. It is not known how inversion of sucrose affects glycaemic response. We investigated postprandial glycaemic and insulinaemic responses to blackcurrant (Ribes nigrum) and lingonberry (Vaccinium vitis-idaea) nectars and a reference drink (water) sweetened with glucose and fructose, representing completely inverted sucrose. The nectars and reference drink (300 ml) contained 17·5 g glucose and 17·5 g fructose. Polyphenol composition of the nectars was analysed. A total of eighteen healthy volunteers participated in a randomised, controlled, cross-over study. Blood samples were collected at fasting and six times postprandially during 120 min. Inverted sucrose in the reference drink induced glycaemic and insulinaemic responses similar to those previously observed for intact sucrose. In comparison with the reference, the blackcurrant nectar attenuated the early glycaemic response and improved glycaemic profile, and the lingonberry nectar reduced the insulinaemic response. The responses induced by inverted sucrose in the berry nectars are similar to those previously observed for berry nectars containing intact sucrose, suggesting that inversion has no major impact on glycaemic response to sucrose-sweetened berry products. The attenuated glycaemic response after the blackcurrant nectar may be explained by inhibition of intestinal absorption of glucose by blackcurrant anthocyanins.
Is ultrasonography-guided drainage a safe and effective alternative to incision and drainage for deep neck space abscesses?
Authors: Dabirmoghaddam P , Mohseni A , Navvabi Z , Sharifi A , Bastaninezhad S , Safaei A 
Published: January 2017

AbstractBackground:Deep neck space abscesses are common head and neck surgery emergencies. Traditionally, surgical incision and drainage has been the main treatment for deep neck abscesses. Recently, it has been suggested that ultrasound-guided drainage of neck abscesses can be an effective and less invasive alternative to incision and drainage.Methods:Patients with deep neck space abscesses referred to the emergency department of Amiralam Hospital were assessed and enrolled to the study if they met the inclusion criteria. Patients were randomly assigned to incision and drainage or ultrasound-guided drainage groups using sealed envelopes.Results:Sixty patients were evaluated, with 30 patients in each group. There was a significant difference (p < 0.001) in mean length of hospital stay between patients who underwent ultrasound-guided drainage (5.47 days) and those who underwent incision and drainage (9.70 days).Conclusion:Ultrasound-guided drainage is an effective and safe procedure, leading to shorter hospital stay, and thus may be a suitable alternative to incision and drainage of deep neck abscesses.
Clinical features and radiological evaluation of otic capsule sparing temporal bone fractures
Authors: Song S W , Jun B C , Kim H 
Published: January 2017

AbstractObjective:To evaluate the clinical and radiological aspects of otic capsule sparing temporal bone fractures.Methods:Using medical records, 188 temporal bones of 173 patients with otic capsule sparing temporal bone fractures were evaluated. Otoscopic findings and symptoms, facial paralysis, and hearing loss were assessed.Results:Using regional analysis, 7 fractures were classified as type I, 85 as type II, 169 as type III and 114 as type IV. Fourteen of the 17 facial paralysis cases improved to House–Brackmann grade II or lower at an average of 57.6 days after the initial evaluation. Thirty-one patients underwent initial and follow-up pure tone audiometry examinations. The air–bone gap closed significantly from 27.2 dB at an average of 21.8 days post-trauma to 19.6 dB at an average of 79.9 days post-trauma, without the need for surgical intervention.Conclusion:Initial conservative treatment for facial paralysis or conductive hearing loss is possible in otic capsule sparing fracture cases after careful evaluation of the patient.
The effect of local application of insulin-like growth factor for prevention of inner-ear damage caused by electrode trauma
Authors: Gur H , Alimoglu Y , Duzenli U , Korkmaz S , Inan S , Olgun L 
Published: January 2017

AbstractBackground:Electrode insertion during cochlear implantation causes cochlear damage and apoptosis. Insulin-like growth factor applied locally was investigated in 21 rats.Methods:In the sham group, an intracochlear dummy electrode was inserted through the round window. In the control group, after the same insertion procedure, saline-soaked porcine skin gelatine was placed on the round window. In the study group, insulin-like growth factor 1 soaked gelatine was placed on the round window. Auditory brainstem response thresholds were measured and histopathological examination was performed.Results:In the study group, at 2–4 kHz, one rat had deterioration, one showed improvement and the rest had stable thresholds 14 days after intervention. At 6 kHz, four rats showed improvement and the rest remained stable. At 8 kHz, four showed improvement, one had deterioration and two remained stable. In the other groups, hearing loss deteriorated in about half of the rats and remained stable in the rest. The mean post-operative 6 kHz threshold was significantly lower than that immediately after the intervention in the study group, contrary to the other groups. The study group had significantly better mean histopathological grading than the other groups.Conclusion:Local insulin-like growth factor 1 application may protect hearing after cochlear implantation.
Effects of agmatine sulphate on facial nerve injuries
Authors: Surmelioglu O , Sencar L , Ozdemir S , Tarkan O , Dagkiran M , Surmelioglu N , Tuncer U , Polat S 
Published: January 2017

AbstractObjective:To evaluate the effect of agmatine sulphate on facial nerve regeneration after facial nerve injury using electron and light microscopy.Methods:The study was performed on 30 male Wistar albino rats split into: a control group, a sham-treated group, a study control group, an anastomosis group, and an anastomosis plus agmatine sulphate treatment group. The mandibular branch of the facial nerve was dissected, and a piece was removed for histological and electron microscopic examination.Results:Regeneration was better in the anastomosis group than in the study control group. However, the best regeneration findings were seen in the agmatine sulphate treatment group. There was a significant difference between the agmatine group and the others in terms of median axon numbers (p < 0.004) and diameters (p < 0.004).Conclusion:Agmatine sulphate treatment with anastomosis in traumatic facial paralysis may enhance nerve regeneration.
‘They're just who they've always been’: the intersections of dementia, community and selfhood in Scottish care homes
Authors: MULLAY STEVE , SCHOFIELD PAT , CLARKE AMANDA , PRIMROSE WILLIAM 
Published: January 2017

ABSTRACTIssues stemming from differences and similarities in cultural identities affect residents and workforces in care homes in Scotland, as they do across the United Kingdom. Theoretical guidance and policy drivers emphasise the importance of considering cultural diversity when planning or enacting person-centred care processes, regardless of where health or social care takes place. Nevertheless, there is a recognised worldwide dearth of research concerning the intersections of culture, dementia and long-term care. This being so, a recent research study found that inadequate understandings of issues stemming from cultural diversity could be seen to constrain person-centred care in some Scottish care homes. In addition, the study uncovered little-recognised socio-cultural phenomena which were observed to positively enhance person-centre care. This article will focus on that, and will lay out findings from the study which lead to the following broad assertion: there is a broad lack of understanding of the power, and potential utility, of shared identity and community as a bulwark against the erosion of personhood which is often associated with dementia. This article describes these findings in some detail, thereby providing fresh insights into how shared cultural identity, and the sense of community it may bring, bears upon the interactions between workers and residents with dementia in Scottish care homes. It then suggests how the school of ‘person-centred care’ may be developed through further research into these phenomena.
Meltwater as a source of potentially bioavailable iron to Antarctica waters
Authors: Monien Donata , Monien Patrick , Brünjes Robert , Widmer Tatjana , Kappenberg Arne , Silva Busso Adrian A. , Schnetger Bernhard , Brumsack Hans-Jürgen 
Published: January 2017

AbstractRecent rapid retreat of glacial front lines and the loss of land ice along the Antarctic margins may play an important role in exporting suspended particulate matter (SPM) potentially rich in bioavailable (defined as ascorbate leachable) iron (FeA) to coastal areas of the Southern Ocean. Sediment ablation is an additional source of iron for this high-nutrient low-chlorophyll region. In Potter Cove, King George Island, meltwater streams discharge up to 18 000 mg l-1(average 283 mg l-1) of slightly weathered, finely ground bedrock particles into coastal waters during the summer. Approximately 15% of this SPM is exported within a low-salinity surface plume into Bransfield Strait. Based on our data, an estimated 12 mg m-2yr-1of FeAis exported from the South Shetland Island land surface (ice-free and subglacial areas) to the surrounding coastal waters. Extrapolated to an area of 2.5x104km2, this FeAinput is comparable to the contribution from icebergs andc.240-fold higher than aeolian input via dust. An observed rise in local sediment accumulation rates suggests that glacial erosion has been increasing over recent decades and that (sub-)glacially derived SPM is becoming more important as a source of iron to the Southern Ocean.
Population estimate of Trindade PetrelPterodroma arminjonianaby the use of Predictive Nest Habitat Modelling
Authors: KRÜGER LUCAS , PAIVA VITOR H. , PETRY MARIA VIRGINIA , MONTONE ROSALINDA C. , RAMOS JAIME A. 
Published: January 2017

SummaryThe Trindade PetrelPterodroma arminjonianais a vulnerable species that breeds on Trindade Island, 1,100 km away from the Brazilian coast, and on Round Island in the Indian Ocean. Recent population estimates for Trindade Island by nest counts in accessible areas, and extrapolated to the whole island provided a figure of 1,130 breeding pairs. Using topographic variables and Predictive Nest Habitat Modelling from known breeding sites, we estimated the potential area of nesting and estimated the size of the breeding population. Nests were associated with low to intermediate elevations in areas of steep slopes and high runoff, which limited the distribution of potential breeding sites to the edges of the Island. By extrapolating the density of nests in the known breeding sites to the overall potential breeding area, we estimated 1,228 nests. We discuss the potential implications of our findings in relation to the population status based on the scenario of intense habitat modification of the island over the few last centuries. This species may have suffered declines due to habitat alteration by human activities and introduction of exotic species. Furthermore, we generate an overview of potential areas for nesting and establish relationships with habitats that may be useful for the conservation of the Trindade Petrel, and restoration actions for Trindade Island in the future.