bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Reducing Agent on the Dispersion of Pt Nanoparticles on Electrospun Nb0.1Ti0.9O2 Nanofibers
Authors: Alvar Esmaeil Navaei , Zhou Biao , Eichhorn S. Holger 
Published: June 2013

ABSTRACTDegradation of the catalyst and catalyst support is an essential limitation of polymer electrolyte membrane (PEM) fuel cells containing commercial platinum on carbon catalysts. Catalysts based on platinum nanoparticles coated onto nanostructured TiO2 materials are presently investigated as a more stable and equally cost effective alternative. Reported here is the synthesis of two different Pt/Nb0.1Ti0.9O2 catalysts that were prepared by chemical reduction of H2PtCl6 with either sodium borohydride in ethanolic surfactant solution or ethylene glycol. X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and high-resolution transmission electron microscopy confirmed the deposition of Pt nanoparticles on the surface of the nanofibers and revealed average sizes of 5.4 nm and 7.6 nm for reduction with ethylene glycol and sodium borohydride, respectively. The formation of smaller sized Pt nanoparticles in ethylene glycol is reasoned with the passivation of the nanoparticle surface by glycolic anions. Cyclic voltammetry measurements confirmed a higher electrochemical specific surface area (ESCA) of about 5.45 m2/gPt for the catalyst with smaller nanoparticles while the other catalyst reached only 4.96m2/gPt. Both catalysts retain about 60% of their electrochemically active surface area after 1000 voltammetric cycles in the range of 0.03 to 1.4 V vs. RHE. This relatively high value of activity retention is explained with a strong interaction between Pt nanoparticles and Nb0.1Ti0.9O2 support.
Design of an optical transmission WDM link using plastic optical fibers
Authors: Louro P. , Soares P. , Ferraz H. , Pinho P. , Vieira M. 
Published: June 2013

ABSTRACTIn this paper we present the design of an optical transmission system, using plastic optical fiber (POF), which operates in the visible range of the electromagnetic spectrum. The optical signals are generated by modulated visible LEDs, transmitted through POF and at the reception end a pin-pin photodetector is implemented. A computer simulation tool dedicated to the analysis of optical circuits was used for preliminary analysis of the optical system. The performance of the optical link was analyzed by BER prediction variation on the transmission rate. The tested optical system was assembled using high efficiency LEDs of the same wavelengths, a commercial POF and a pin-pin photodetector based on a-SiC:H/a-SI:H. This detector behaves as an optical filter with controlled wavelength sensitivity. Different optical signals, obtained by adequate modulation of LED optical sources, were coupled into the POF and the combined optical signal at the fiber termination was directed onto the photodetector active area. The output photocurrent was measured with and without optical bias. Results compare the use of a pin-pin transducer device in free space and in a POF transmission link.
Is Incretin-Based Therapy Ready for the Care of Hospitalized Patients With Type 2 Diabetes?
Authors: Umpierrez Guillermo E. , Korytkowski Mary 
Published: June 2013

Significant data suggest that overt hyperglycemia, either observed with or without a prior diagnosis of diabetes, contributes to an increase in mortality and morbidity in hospitalized patients. In this regard, goal-directed insulin therapy has remained as the standard of care for achieving and maintaining glycemic control in hospitalized patients with critical and noncritical illness. As such, protocols to assist in management of hyperglycemia in the inpatient setting have become commonplace in hospital settings. Clearly, insulin is a known entity, has been in clinical use for almost a century, and is effective. However, there are limitations to its use. Based on the observed mechanisms of action and efficacy, there has been a great interest in using incretin-based therapy with glucagon-like peptide-1 (GLP-1) receptor agonists instead of, or complementary to, an insulin-based approach to improve glycemic control in hospitalized, severely ill diabetic patients. To provide an understanding of both sides of the argument, we provide a discussion of this topic as part of this two-part point-counterpoint narrative. In the point narrative preceding the counterpoint narrative below, Drs. Schwartz and DeFronzo provide an opinion that now is the time to consider GLP-1 receptor agonists as a logical consideration for inpatient glycemic control. In the counterpoint narrative provided below, Drs. Umpierrez and Korytkowski provide a defense of insulin in the inpatient setting as the unquestioned gold standard for glycemic management in hospitalized settings.
—William T. Cefalu, MD
Editor in Chief, Diabetes Care
Some aspects of the last glaciation in the Mazury Lake District (north-eastern Poland)
Authors: Pochocka-Szwarc Katarzyna 
Published: June 2013

ABSTRACT
The morphology of the Mazury Lake District (north-eastern Poland) dates from 24-19 ka (main stadial of the youngest Vistulian glaciation). During this last glacial maximum (MIS 2) a belt with lacustrine basins was formed when the ice sheet retreated at the end of the Pomeranian phase. The ice-sheet retreat is morphologically also expressed by the occurrence of end moraines. The study area is situated in the Skaliska Basin, in the northern part of the Lake District (near the Polish/ Russian border), at the periphery of zone with end moraines. Originally the basin was an ice-dammed depression filled with melt water; the water flowed out into the developing Pregoła valley when the ice retreated and did no longer dam off the depression. The basin, which is surrounded by hill-shaped moraines, is filled now with Late Glacial and Holocene glaciolacustrine sediments. The organic sediments of the basin record the history of the Late Glacial and Holocene climatic changes in this region.
Depositional environment of a fan delta in a Vistulian proglacial lake (Skaliska Basin, north-eastern Poland)
Authors: Woronko Barbara , Pochocka-Szwarc Katarzyna 
Published: June 2013

ABSTRACT
The study reconstructed the environment of a fan delta filling the vast end depression of the Skaliska Basin, and its overlying aeolian deposits. The formation of the large fan delta is associated with the presence of an ice-dammed lake functioning during the retreat of the Vistulian Glaciation (MIS 2). The examined material was collected from five boreholes. Sediments were analysed for their granulometric composition and subjected to analyses of frosting and rounding of quartz grains. Grain size analysis showed that the fan delta deposits are built of sand sediments of very low lateral and vertical variability. The fan delta was supplied with fluvioglacial sediments. Accumulation of sediments occurred in shallow water with a very low-gradient slope. The exposed fan delta became a site conducive to aeolian processes after the lake waters fell and the Skaliska Basin depression dried. Dune deposits overlying the fan were affected by short-distance transport so they did not acquire features typical for aeolian deposits.
The Late Glacial and Holocene development of vegetation in the area of a fossil lake in the Skaliska Basin (north-eastern Poland) inferred from pollen analysis and radiocarbon dating
Authors: Kołaczek Piotr , Kupryjanowicz Mirosława , Karpińska-Kołaczek Monika , Szal Marta , Winter Hanna , Danel Weronika , Pochocka-Szwarc Katarzyna , Stachowicz-Rybka Renata 
Published: June 2013

ABSTRACT
The development of vegetation in the Skaliska Basin has been reconstructed on the basis of palynological analysis and radiocarbon dating (AMS technique) of 6 sites from the late phase of the Bolling- Allerod interstadial complex to modern times. Although the area covers 90 km2, the mosaic character of habitats led to the development of different patterns of vegetation changes during the Late Glacial and Holocene. Only one site located in the eastern part of the Skaliska Basin reflected the ‘pine phase’ of Allerod, and this is the oldest data on vegetation in the Skaliska Basin. Interesting discrepancies were recorded during the Younger Dryas when patches of shrublands with Juniperus were distinct around some of the sites, while steppe with Artemisia was common in others. The beginning of the Holocene brought an expansion of birch-pine forest, but around 9600 cal. BC a cold oscillation took place which was reflected in an increase in birch in the woodlands in the western and eastern part of the Skaliska Basin. In the Preboreal chronozone elm (Ulmus) also expanded in the area but its appearance was non-synchronous. The vegetation of the Boreal chronozone was similar in the whole area and the most characteristic feature was the rapid expansion of hazel (Corylus avellana) which displaced Betula from the most of its sites. At that time a distinct redeposition of pollen material in the Parchatka river valley was detected which was probably the effect of an increase in fluvial activity of the river (humid oscillation). The following stage of vegetation development was climax woodlands with Tilia cordata, Ulmus, Quercus, Corylus avellana, and Alnus in damp places. At the beginning of the Subboreal chronozone the expansion of Quercus took place, which was subsequently replaced by Picea abies and partly Carpinus betulus. The pattern of Picea abies expansion distinctly presents two maxima which is characteristic of many sites in the north-eastern Poland. The Subatlantic chronozone is represented only by the profile from the Skaliski Forest, where, because of sandy ground, Pinus sylvestris was the dominant element. Human impact was poorly reflected through the rare occurrence of pollen grains of Cerealia type in the pollen profiles spanning the time from the Subboreal chronozone to modern times. In most profiles AMS dating produced age discrepancies, which limited the possibility of establishment of a detailed chronology. However, dates obtained from the material contaminated by mixture of glycerine, thymol and ethyl alcohol, pretreated by alcohol, showed reliable results in most cases.
Quantum estimation of a two-phase spin rotation
Authors: Vaneph Cyril , Tufarelli Tommaso , Genoni Marco G. 
Published: June 2013

Abstract
system, characterised by two unknown phases, and compare
the estimation precision achievable with two different strategies.
The first is a standard ‘joint estimation’ strategy, in which
a single probe state is used to estimate both parameters, while
the second is a ‘sequential’ strategy in which the two phases
are estimated separately, each on half of the total number of
system copies.
In the limit of small angles we show that, although the joint
estimation approach yields in general a better performance,
the two strategies possess the same scaling of the total phase
sensitivity with respect to the spin number j, namely ΔΦ≃ 1/j.
Finally, we discuss a simple estimation strategy based on spin
squeezed states and spin measurements, and compare its
performance with the ultimate limits to the estimation precision
that we have derived above.
Highly efficient organic ultraviolet photodetectors based on excellent Cu (I) complexes
Authors: Liu C. , Su B. , Liu M. , Zhang X. , Wang L. , Zhang S. , Che G. , Xu Z. 
Published: June 2013

AbstractWe demonstrate high response organic ultraviolet photodetectors using 4,4′,4″-tris[3-methyl-pheny(phenyl)amino]tri-phenylamine (m-MTDATA) and two novel Cu(I) complexes, [Cu(DPEphos)(PyPhen)]BF4 (CuDP)(DPEphos = Bis [2-(diphenylphosphino)phenyl]ether, PyPhen = pyrazino[2,3-f][1,10]phenanthroline) and [Cu(DPEbenz)(PyPhen)]BF4 (CuBP) (DPEbenz = 1,2-bis(diphenylphosphino)benzene) to act as the electron donor and acceptor, respectively. Strong photoluminescence quenching of m-MTDATA by Cu(I) complexes is observed manifesting the efficient photoinduced charge transfer that occurs between m-MTDATA and Cu(I) complexes. The optimized photodetector based on CuBP exhibits a maximum response of 276 mA/W at −12 V under an illumination of 365 nm UV light irradiation with an intensity of 1.75 mW/cm2. The high response is attributed to feasible energy level match, efficient electron transfer from m-MTDATA to CuBP and skillful device design. More detailed working mechanism of harvesting high performance is also discussed.
Prostitution masculine sur internet. Le choix du client
Authors: Rubio Vincent 
Published: June 2013

Cet article traite d’une forme récente de travail sexuel : l’ escorting ou la prostitution sur Internet. Il en aborde une population inconnue, les jeunes hommes dont les services sont à destination des hommes. Ces garçons au profil socio-économique inattendu et à la pratique prostitutionnelle singulière, mettent en œuvre des procédures de classement aboutissant à un appariement social avec leurs clients. S’y articule l’inversion de la relation symbolique entre client et personne prostituée.
Pratiques de modération sur le site de rencontres Meetic
Authors: Beunet Laurie 
Published: June 2013

La nature des relations sur un site de rencontres est multiple ; elles font donc l’objet d’un contrôle. Fruit d’une enquête menée au sein du « service clients » du site de rencontre Meetic , cet article analyse l’organisation du travail autour de valeurs sociales liées à la rencontre amoureuse et sexuelle et permet de comprendre, à l’échelle européenne, une des formes de contrôle social sur Internet.
La fin de l'adolescence aujourd'hui
Authors: Ungar Virginia 
Published: June 2013

L’auteur place l’adolescence dans un point de tension entre l’approche évolutive qui postule une séquence déjà prévue qui doit être accomplie nécessairement, et d’autres perspectives qui considèrent qu’il s’agit d’un état mental indépendant, d’une certaine manière, de l’âge. Pour étudier la fin de l’adolescence, l’auteur considère que dans l’actualité, époque de changements accélérés, il y a au moins trois facteurs qui affectent le parcours et la fin de l’adolescence de même que la pratique analytique quotidienne : la technologie et les médias, la sexualité et les nouvelles configurations familiales. Chacun de ces sujets est examiné séparément. La question de la fin d’analyse des patients adolescents est considérée dans une section à part.
Parentalité et fins de l'adolescence
Authors: Servant Benoît 
Published: June 2013

La fonction parentale est présente à la fin d’adolescence à un double titre : du côté du thérapeute, dont la dimension parentale sublimée est relevée par différents auteurs, ce qui est ici illustré par des vignettes cliniques ; du côté de l’adolescent, dont l’entrée dans l’âge adulte est intimement liée à son accession à la capacité psychique de devenir parent, ce qui est également abordé dans la littérature, et illustré par l’auteur, en particulier pour des cas de fin d’adolescence différée. La fin d’adolescence est ainsi ce moment où le sujet est en mesure de reprendre à son compte ce qu’il a reçu pour le transmettre à son tour.
Juliette ou la chrysalide
Authors: Chamoun Bénédicte 
Published: June 2013

Comment finir l’adolescence quand on peine à y entrer ? Comment une équipe d’hôpital de jour se sépare-t-elle d’un jeune adulte qu’elle a suivi pendant des années ? À travers le cas de Juliette, jeune fille engluée dans ses résistances au changement et générant dans l’institution un sentiment d’impuissance identique à celui des parents, nous tenterons de montrer comment la limite posée à la prise en charge peut favoriser l’expression de certaines motions pulsionnelles jusque-là réprimées et permettre à un véritable processus maturatif de s’instaurer. Du côté de l’institution, il faudra renoncer aussi à une forme de toute-puissance pour laisser advenir le nouveau sujet dans sa singularité.
L'émergence et l'élaboration d'un patrimoine télévisuel en Méditerranée
Authors: Crivello Maryline 
Published: June 2013

Des dispositifs internationaux tels que le Partenariat euroméditerranéen (PEM) ou l’Union pour la Méditerranée (UPM) ont cherché à défier les affrontements potentiels en Méditerranée. Par ailleurs, le rôle des médias et des réseaux sociaux n’a cessé de démontrer leur importance dans cette configuration, à la lumière, notamment, des récentes « révolutions arabes ». Dans ce contexte, deux projets de sauvegarde et de diffusion des archives audiovisuelles des télévisions nationales de la Méditerranée ont vu le jour grâce au PEM. Le projet Cap-Med (2000-2005) a permis de sauver les archives télévisuelles de douze pays méditerranéens menacées de disparition en raison de la dégradation des supports. Il a été nécessaire de les numériser pour les sauvegarder et les rendre accessibles dans les milieux professionnels. Le projet MedMem. Mémoires audiovisuelles en Méditerranée (2009-2013) visait, quant à lui, à constituer un site internet gratuit et éditorialisé à partir d’une sélection d’archives télévisuelles de pays méditerranéens. Par leur démarche, ces initiatives mettent en jeu l’émergence d’un espace politique méditerranéen et la prise de conscience d’un patrimoine télévisuel dans cet espace, mais participent également à la structuration des politiques et des études dites méditerranéennes.
Peut-on entendre Sarah Bernhardt ?
Authors: Mervant-Roux Marie-Madeleine 
Published: June 2013

« Nous pouvons écouter des sons enregistrés dans le passé, mais nous ne pouvons prétendre que nous savons exactement ce qu’était l’audition à un moment ou en un lieu particulier du passé. À l’époque de la reproduction technologique, nous pouvons parfois faire l’expérience d’un passé audible, mais nous ne pouvons que présumer l’existence d’un passé auditif. » Ce constat formulé par Jonathan Sterne dans The Audible Past (2003), nous avons pu en vérifier la validité et l’importance dans le cadre d’une recherche internationale consacrée au « son du théâtre ( xix e - xxi e siècles) » étudié à partir des tout premiers enregistrements. Les enseignements les plus riches nous sont venus d’un séminaire de formation spécifiquement dédié aux archives sonores et largement fondé sur des exercices d’écoute. Le premier des enseignements est que la plupart de ces archives laissent croire aux auditeurs qu’elles sont immédiatement audibles. Le meilleur exemple, le plus célèbre, est celui de la grande Sarah, dont les enregistrements de Phèdre ont été souvent commentés. Les chercheurs les plus avisés mettent leur déception (fréquente) sur le compte du phonographe. En nous appuyant sur un corpus de phonogrammes théâtraux, nous nous intéresserons aux caractéristiques originales des documents audio, à leur double rapport intense et au passé et au présent, avant de proposer les règles d’une écoute historicisée.
Complications of Femtosecond Laser-Assisted Re-treatment for Residual Refractive Errors After LASIK
Authors: Vaddavalli Pravin K. , Diakonis Vasilios F. , Canto Ana P. , Culbertson William W. , Wang Jianhua , Kankariya Vardhaman P. , Yoo Sonia H. 
Published: June 2013

PURPOSE:
To report complications of femtosecond laser-assisted re-treatment by the creation of side cuts within the old flaps for residual refractive error after primary LASIK in two patients.

METHODS:
Case report.

RESULTS:
Three eyes of two patients had complications with a circumferential sliver of stromal tissue displaced during surgery due to overlap of old and new side cuts. The displaced tissue was repositioned and corneal anatomy was restored. Two of three eyes demonstrated improvement in the uncorrected visual acuity, whereas one eye lost two lines of corrected visual acuity due to loss of tissue at side cut resulting from flap manipulation, which was done at 1 week.

CONCLUSIONS:
These cases demonstrate a complication of femtosecond laser-enabled side-cut for LASIK enhancement and factors that may lead to this complication and precautions to avoid it.

[
J Refract Surg.
2013;29(8):577–580.]
Apoptotic Effects of Topical Antiglaucoma Medications on Conjunctival Epithelium in Glaucoma Patients
Authors: Arici Mustafa Kemal , Arici Dilek Sema , Özeç Ayşe Vural , Dursun Ayhan , Toker Mustafa İlker , Erdoğan Haydar 
Published: June 2013

Purpose In this study, we aimed to investigate the apoptotic effects of topical antiglaucoma medications on the conjunctival epithelium. Methods A total of 65 patients were included in the study. Thirty patients were included in the first group who had received antiglaucomatous therapy before trabeculectomy. In the second group, 20 patients who had received no drugs before trabeculectomy were included, while the third group underwent only cataract surgery as control. During the surgery, 2 × 4 mm conjunctival samples were harvested from the upper bulbar conjunctiva. The mean apoptosis rate was calculated by determining apoptosis at conjunctival epithelium using the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) method. Results The mean apoptosis rate was 0.537 ± 0.369 (0.026 ± 0.962) in group 1, 0.139 ± 0.162 (0.005 ± 0.676) in group 2, and 0.078 ± 0.035 (0.035 ± 0.142) in the control group (group 3). The mean apoptosis rate was significantly higher in the first group than the other 2 groups (p = 0.0001). Conclusions Apoptotic effects of topical antiglaucoma drugs on the conjunctival epithelial cells were found. However, our results revealed that the number of medications, duration of medication, and type of glaucoma had no effect on the apoptotic effect.
De la thermoception à la perception auditive : en quête de l’identité du son « froid »
Authors: Traube Caroline 
Published: June 2013

La description du son peut prendre mille et un visages, de l’onomatopée à la métaphore. En musique, parmi les analogies fréquemment employées, on retrouve des descripteurs faisant référence à différentes modalités sensorielles : brillant, sombre (vision), rugueux, lisse (toucher), velouté, aigre (goût). La thermoception – la perception de la température via des récepteurs cutanés – n’est pas en reste puisque la chaleur du son est un attribut régulièrement utilisé par les musiciens pour décrire le timbre ou la qualité du son. Ainsi, le son « chaud » est un son à la fois rond, doux et ouvert, et le son « froid » est généralement de caractères métallique, brillant et mince. Dans cet article, nous présenterons une synthèse d’études sur la perception auditive et la sémantique du timbre qui ont investigué les descripteurs verbaux reliés à la chaleur ou à la froideur du son ainsi que leurs corrélats acoustiques. Nous tenterons également de présenter quelques hypothèses sur les origines multisensorielles de la perception de cette qualité sonore.
A Fast pH‐Switchable and Self‐Healing Supramolecular Hydrogel Carrier for Guided, Local Catheter Injection in the Infarcted Myocardium
Authors: Bastings Maartje M. C. , Koudstaal Stefan , Kieltyka Roxanne E. , Nakano Yoko , Pape A. C. H. , Feyen Dries A. M. , van Slochteren Frebus J. , Doevendans Pieter A. , Sluijter Joost P. G. , Meijer E. W. , Chamuleau Steven A. J. , Dankers Patricia Y. W. 
Published: June 2013

AbstractMinimally invasive intervention strategies after myocardial infarction use state‐of‐the‐art catheter systems that are able to combine mapping of the infarcted area with precise, local injection of drugs. To this end, catheter delivery of drugs that are not immediately pumped out of the heart is still challenging, and requires a carrier matrix that in the solution state can be injected through a long catheter, and instantaneously gelates at the site of injection. To address this unmet need, a pH‐switchable supramolecular hydrogel is developed. The supramolecular hydrogel is switched into a liquid at pH > 8.5, with a viscosity low enough to enable passage through a 1‐m long catheter while rapidly forming a hydrogel in contact with tissue. The hydrogel has self‐healing properties taking care of adjustment to the injection site. Growth factors are delivered from the hydrogel thereby clearly showing a reduction of infarct scar in a pig myocardial infarction model.