bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scheduling for Christmas: How an ‘ordinary’ piece of television became extraordinary
Authors: Tucker Paul , Wolfenden Helen , Sercombe Howard 
Published: May 2017

Abstract
Is Mise Michelle/I am Michelle (2011) is an hour-long television programme commissioned for BBC Alba, the BBC’s Gaelic language television channel. Filmed in the summer of 2011, the scheduling intentions were very open, as needs must where frequent replays are financially necessary. Unexpectedly, however, the programme was scheduled for the prime 9 p.m. slot on Christmas Day 2011. In the process, the programme was transformed: from ‘ordinary television’, in Bonner’s concept, to prime television. Understood originally in Lotz’s terms as ‘mainstream niche’, the programme had to carry the weight of bringing the mainstream to the niche in this high-value slot. Originally conceived as a story of ancestry along the lines of Who Do You Think You Are? (2010–), in its new Christmas clothing the programme becomes a bearer for a more universal longing for home, for family, for community and for belonging. This article explores these transformations, and the decision-making that led to them, through interviews with the primary practitioners involved in the production process, from commissioning through to scheduling. In particular, the under-researched role of scheduling in the encoding/decoding transaction (Hall [1973] 1993) gets some much needed attention.
Festive television in the socialist world: From media events to media holidays
Authors: Huxtable Simon , Mihelj Sabina , Bardan Alice , Szostak Sylwia 
Published: May 2017

Abstract
This article focuses on the ways in which socialist television sought to create a sense of extraordinary temporality out of the ordinary through its coverage of historical commemorations, national days, and secular and religious festivities. To do so, it develops the concept of ‘media holidays’, which draws on Dayan and Katz’s seminal notion of media events, and the work of other scholars of media ritual, to show the ways in which socialist television created extraordinary temporalities through scheduling. Drawing on schedule analysis and archival documents, the article compares the cases of television in East Germany, the Soviet Union and Yugoslavia. It examines a number of different kinds of media holiday on socialist television, and shows how different kinds of holidays and commemoration were marked with different kinds of programming in which entertainment played an important role.
Do they know it’s Christmastime at all?: Mad Men and the dangers of seasonal nostalgia
Authors: Hoffman Emily 
Published: May 2017

Abstract
Continuing an association between nostalgia and Christmas that originated after the reign of Queen Victoria in England, seasonal Christmas episodes on television have traditionally woven nostalgia and characters’ journeys home into their plotlines. These plotlines seem to take a limited number of predictable forms that have remained remarkably consistent throughout television history. Regardless of the specific plot type, the episodes conclude with a heart-warming, optimistic ending that finds characters at home, happy and fulfilled. AMC’s Mad Men (2007−2010), a show often considered to be emblematic of the so-called third golden age of US television, defies this tradition through its Thanksgiving and Christmas episodes that aggressively subvert viewer expectations. It often presents situations resembling those found in traditional seasonal episodes only to lead characters to moments of distress and discord rather than contentment and reconciliation. In these episodes, nostalgia has negative consequences, and is portrayed as the disease it was originally believed to be. Meanwhile, home is a site of danger, defilement, and destruction. It is not until Mad Men’s final episode that characters are ‘cured’ of their nostalgia and the show delivers the type of uplifting ending that has been repeatedly deferred.
The signaling lipid phosphatidylinositol‐3,5‐bisphosphate targets plant CLC‐a anion/H+ exchange activity
Authors: Carpaneto Armando , Boccaccio Anna , Lagostena Laura , Di Zanni Eleonora , Scholz‐Starke Joachim 
Published: May 2017

AbstractPhosphatidylinositol‐3,5‐bisphosphate (PI(3,5)P2) is a low‐abundance signaling lipid associated with endo‐lysosomal and vacuolar membranes in eukaryotic cells. Recent studies on Arabidopsis indicated a critical role of PI(3,5)P2 in vacuolar acidification and morphology during ABA‐induced stomatal closure, but the molecular targets in plant cells remained unknown. By using patch‐clamp recordings on Arabidopsis vacuoles, we show here that PI(3,5)P2 does not affect the activity of vacuolar H+‐pyrophosphatase or vacuolar H+‐ATPase. Instead, PI(3,5)P2 at low nanomolar concentrations inhibited an inwardly rectifying conductance, which appeared upon vacuolar acidification elicited by prolonged H+ pumping activity. We provide evidence that this novel conductance is mediated by chloride channel a (CLC‐a), a member of the anion/H+ exchanger family formerly implicated in stomatal movements in Arabidopsis. H+‐dependent currents were absent in clc‐a knock‐out vacuoles, and canonical CLC‐a‐dependent nitrate/H+ antiport was inhibited by low concentrations of PI(3,5)P2. Finally, using the pH indicator probe BCECF, we show that CLC‐a inhibition contributes to vacuolar acidification. These data provide a mechanistic explanation for the essential role of PI(3,5)P2 and advance our knowledge about the regulation of vacuolar ion transport.
Primary cutaneous B-cell lymphoma and chronic leg ulcers in a patient with type 2 diabetes
Authors: Mantovani Alessandro , Perrone Fabrizia , Stoico Vincenzo , Pichiri Isabella , Salvotelli Laura , Teobaldi Ilaria , Bruti Massimiliano , Conti Michela , Cima Luca , Eccher Albino , Bonora Enzo 
Published: May 2017

Summary
The incidences of type 2 diabetes mellitus and many cancers are rapidly increasing worldwide. Diabetes is a strong risk factor for some cancers (including lymphomas) and is also associated with adverse cancer outcomes. After gastrointestinal tract, the skin is the second most frequent extranodal site involved by non-Hodgkin lymphomas and the cutaneous B-cell lymphomas (CBCLs) range from 25% to 30% of all primary cutaneous lymphomas. The primary cutaneous diffuse large B-cell lymphoma (PCDLBCL) is an aggressive lymphoma with a poor prognosis, representing roughly 20% of all primary CBCLs. Classically, the cutaneous manifestation of this lymphoma is a red or violaceous tumors arising on a leg. To date, despite the large body of evidence suggesting that diabetes is strongly associated with an increased risk of some cancers, very little information is available regarding a possible association between type 2 diabetes and primary cutaneous diffuse large B-cell lymphoma. In this report, we will present the case of a white adult patient with type 2 diabetes with chronic leg ulcers complicated by a primary cutaneous diffuse large B-cell lymphoma.

Learning points:

Diabetes mellitus is increasing worldwide as well as the incidence of many cancers.

Diabetes mellitus is a powerful risk factor for some cancers (including lymphomas) and is strongly associated with adverse cancer outcomes.

Seen that diabetes is strongly associated with an increased risk of cancers (including cutaneous lymphomas), clinicians should always keep in mind this complication in elderly patients with type 2 diabetes, even in a chronic leg ulcer with hypertrophy of the wound edge, which is hard to heal and does not have the typical characteristics of a diabetic or vascular ulcer. In these cases, a biopsy should be performed to rule out a neoplasm.

Early diagnosis and correct management of cancer in a patient with type 2 diabetes are crucial to improve clinical outcomes.
LA METÁFORA EDUCATIVA: HERRAMIENTA PARA GENERAR IMÁGENES DEL CURSO FUNDAMENTOS DE DIDÁCTICA, SEGÚN VYGOTSKY
Authors: OLIVARES MIRANDA MARITZA 
Published: May 2017

En la actualidad, el ejercicio profesional docente demanda la inserción de prácticas de enseñanza novedosa, conducente a generar en el discente, pensamiento reflexivo que lo induzca a un mayor compromiso con su propio aprendizaje. De ésta forma, el o la docente de enseñanza superior, está llamado a romper con los esquemas de la educación tradicional, para asumir un rol de facilitador de la capacidad potencial de autorrealización de sus estudiantes, en proceso de formación. Hoy día, es tarea ineludible, la revisión de las prácticas pedagógicas en el ámbito universitario, en el entendido que el aprendizaje está ligado a la significación de los contenidos, con los conocimientos previos que tienen los aprendientes, a quienes se les debe brindar el espacio en el aula, para compartirlos, mediante la inserción de una técnica de enseñanza. Precisamente, esta experiencia se sustenta en la aplicación de la metáfora educativa, para conocer las experiencias previas de los alumnos en torno a los contenidos del curso, sustentado en el pensamiento de Lev Vygotsky. En consideración al anterior planteamiento, el artículo presenta una experiencia de aprendizaje, generada en la primera lección del curso Fundamentos de Didáctica, que se imparte a los estudiantes de las carreras de Educación Primaria y Preescolar, ofrecidas en la Sede de Guanacaste, Universidad de Costa Rica.
OBSERVACIONES METEOROLÓGICAS EN LA REGIÓN CARIBE DE COSTA RICA (1833-1949)
Authors: DÍAZ BOLAÑOS RONALD E. , SOLANO CHAVES FLORA J. , AMADOR ASTÚA JORGE A. 
Published: May 2017

El presente artículo sintetiza los principales procesos histórico-científicos que permitieron el desarrollo de las primeras observaciones meteorológicas elaboradas en la región caribeña de Costa Rica. Se parte de las descripciones y mediciones realizadas por el Bachiller Osejo (1833) hasta la clausura parcial del Servicio Meteorológico y Sismológico Nacional (1949). Durante más de un siglo, dichas observaciones fueron elaboradas, sistematizadas y analizadas por diversos actores. Entre ellos, destacan científicos y estudiosos nacionales y extranjeros, instituciones científicas como el Instituto Físico-Geográfico Nacional y empresas como la United Fruit Company. Los datos recopilados fueron reanalizados e interpretados con el propósito de caracterizar el clima de la región en el pasado. Los resultados de este estudio aportan una línea base de comparación histórica ante el problema actual del cambio climático regional.
Functionalization of Porous Silicon Surfaces through Hydrosilylation Reactions
Authors: Buriak J. M. , Stewart M. P. , Allen M. J. 
Published: May 2017

AbstractHydrosilylation of alkynes and alkenes on silicon surfaces utilizing the native Si-H termination can be smoothly and rapidly carried out (30 s to 24 h) at room temperature through hydrosilylation mediated by Lewis acid catalysts or photoinduction with white light. Insertion of alkynes and alkenes into surface silicon hydride bonds yields covalently bound alkenyl and alkyl groups, respectively. Different chemical functionalities can be incorporated through these hydrosilylation reactions, including ester, hydroxy, chloro, nitrile and chiral groups. Hydrophobic porous silicon surfaces demonstrate remarkable stability with respect to boiling aqueous aerated pH 1 to 10 solutions, and protect the bulk silicon from attack. Modification and tailoring of surface properties through this series of reactions induce wide variations in photoluminescent behavior of porous silicon, leading to almost complete quenching in the case of substituted and unsubstituted styrenyl termination, and minor decreases for alkyl and alkenyl functionalization. Because of the broad range of stable, modified surfaces produced using this chemistry, the work described here represents an important step towards technological applications of silicon surfaces.
Modification of Visible Light Emission from Silicon Nanocrystals as a Function of Size, Electronic Structure, and Surface Passivation
Authors: Wolkin M.V. , Jorne J. , Fauchet P.M. , Allan G. , Delerue C. 
Published: May 2017

AbstractThe effect of surface passivation and crystallite size on the photoluminescence of porous silicon is reported. Oxygen-free porous silicon samples with medium to ultra high porosities have been prepared by using electrochemical etching followed by photoassisted stain etching. As long as the samples were hydrogen-passivated the PL could be tuned from the red (750nm) to the blue (400nm) by increasing the porosity. We show that when surface oxidation occurred, the photoluminescence was red-shifted. For sizes smaller than 2.8nm, the red shift can be as large as 1eV but for larger sizes no shift has been observed. Comparing the experimental results with theoretical calculations, we suggest that the decrease in PL energy upon exposure to oxygen is related to recombination involving an electron or an exciton trapped in Si=O double bonds. This result clarifies the recombination mechanisms in porous silicon.
Microsized Structures Fabricated with Nanoparticles as Building Blocks
Authors: Tian Yongchi , Dinsmore A. D. , Qadri S. B. , Ratna B. R. 
Published: May 2017

AbstractHere we report a nanoparticulate route to Y2O3 nanofibers (~50 nm in diameter and a few micrometers in length) and for the radial growth of ZnS spheres (200-800 nm diameter). Well-defined higher order structures are developed upon thermostatically aging the dispersions of monomeric nanocrystals. The shapes of the “macromolecules„ are correlated to primary monomeric nanocrystallites, the growing time and temperature, and surfactant templating agents. It is anticipated that this approach should inspire fabrication of nanoparticulate structures by using primary nanoparticles as monomers.
Integration of Electrically Isolated Porous Silicon Leds for Applications in CMOS Technology
Authors: Hirschman K. D. , Tsybeskov L. , Striemer C. C. , Chan S. , Fauchet P. M. 
Published: May 2017

AbstractPreviously we reported on integrated porous silicon (PSi) based LEDs with local bipolar drivers that would have possible applications in an active-matrix configuration for display or optical signal transmission [1]. We now report further progress in device engineering and integration that has enabled the fabrication of improved light-emitting silicon devices based on oxide-passivated nanocrystalline silicon (OPNSi) that can be integrated with standard CMOS technology. Design of experiments methodologv was used to direct device engineering experiments, providing a better understanding of how process parameters influence the resulting device performance. It was discovered that the formation of stacking fault defects in the LED region prior to anodization has a predominant effect on both carrier transport and electroluminescence (EL) capabilities of the devices. Process development work has resulted in the fabrication of OPNSi LEDs that offer many of the required attributes of a useful silicon light-emitter. The devices exhibit EL at a bias < 5V, diode-like rectifying I-V characteristics, good stability under DC bias, and uniform emission over the LED contact area. These LEDs have been combined with a new fabrication technique which enables the formation of electrically isolated integrated LEDs in the single-crystal substrate. Each diode structure is formed in its own individual well, enabling junction-isolated devices without a common substrate electrode. Such a process is required to realize integrated LEDs which can be individually addressed in an X-Y array configuration using full-rail voltage modulation. Details of the LED characteristics and device integration will be discussed.
Strong Photoluminescence in the Near-Infrared from Colloidally-Prepared HgTe Nanocrystals
Authors: Harrison M. T. , Kershaw S. V. , Burt M. G. , Rogach A. L. , Kornowski A. , Eychmüller A. , Weller H. 
Published: May 2017

AbstractWe report here the first measurement of strong near-infrared room temperature photoluminescence (PL) from colloidally-prepared HgTe nanocrystals. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) measurements indicate that the nanoparticles are in the cubic coloradoite phase, with a diameter of approximately 4 nm. The absorption spectrum shows a pronounced electronic transition in the near-infrared, and the broad PL appears to consist of several overlapping features between 800 and 1400 nm with a peak at 1080 nm, which represent a dramatic shift from bulk HgTe behaviour. The quantum efficiency (QE) of the freshly prepared sample is around 50%, which is among the highest ever reported for a nanocrystalline material. Over a period of several days, the luminescence shifts further into the infrared yielding more dominant longer wavelength features. The observation of this strong infrared luminescence makes this material a promising candidate for application in optical telecommunication systems.
Optical and Electrical Properties of CdTe Nanocrystal Quantum Dots Passivated in Amorphous TiO2 Thin Film Matrix
Authors: Rastogi A. C. , Sharma S. N. , Kohli Sandeep 
Published: May 2017

AbstractCdTe nanocrystal quantum dots sequestered in TiO2 thin film matrix have been synthesized by r.f. sputtering from a composite CdTe/TiO2 target. CdTe nanocrystal formation is nucleation controlled as their size (11-25 nm), dispersion and volume fraction (0.065-0.2) increases with film thickness, substrate temperature (100°C) and thermal treatment. The optical band gap derived from the onset of absorption coefficient showed blue shifts concurrent with the CdTe nanocrystal size reduction due to quantum size effects. These shifts, not consistent with theoretical models based on strong or weak confinement regimes, are explained on the basis of anisotropic growth and formation of CdTe nanocrystal clusters. TiO2, in addition to being an ideal passivator and providing a barrier for carrier confinement to observe quantum effects, shows O2 vacancy dependent conductivity modulation. Electrical conductivity variation with CdTe nanocrystal size and density is attributed to electrical coupling and tunneling behavior of carriers between CdTe nanocrystallites.
Optical Properties of Self-Organized InGaAs/GaAs Quantum Dots in Field-Effect Structures
Authors: Babinski A. , Tomaszewicz T. , Wysmolek A. , Baranowski J. M. , Lobo C. , Leon R. , Jagadish C. 
Published: May 2017

AbstractThe results of photoluminescence (PL) and electroreflectance (ER) measurements on InGaAs/GaAs self-organized quantum dots (QDs) in field-effect structure are presented. It has been found that the QDs PL can be completely quenched in reversely biased structure both at room temperature and at T=4.2K. A non-monotonic dependence of QDs PL peak energy with applied bias is observed at low temperature, which is attributed to the band-gap re-normalization due to QDs charging and size distribution effects. The electric field dependence of the QDs ER feature at room temperature has been analysed. A red shift of that feature with increasing electric field has been observed.
Synthesis of Boron Carbide Nanowires and Nanocrystal Arrays by Plasma Enhanced Chemical Vapor Deposition
Authors: Zhang Daqing , Kempton B. G. , Mcllroy D. N. , Geng Yongjun , Norton M. Grant 
Published: May 2017

AbstractA plasma enhanced chemical vapor deposition technique has been developed to grow single crystal boron carbide nanowires and nanonecklace arrays using the single precursor closo-l,2-dicarbadodecaborane (C2B10H12). Nanowire and nanonecklace growth is expedited by Fe seeding of the substrate. Using the compound Fe-(C5H5)2 as an Fe source, it has been demonstrated that the density of nanowires, as well as the types of nanostructures that grow, can be tailored by controlling the concentration of Fe deposited onto the substrate surface prior to boron carbide deposition.
Auger Effect Seen in the Porous Silicon Fast Luminescent Band
Authors: M'ghaïeth R. , Mihalcescu I. , Maâref H. , Vial J. C. 
Published: May 2017

AbstractTime resolved photoluminescence (PL) measurements are performed on oxidized and fresh porous silicon at room temperature. Comparing the evolution of the nanosecond time delayed PL in both cases, a new feature of the PL spectra is identified: the fast-red band, present as well in fresh or aged samples. The nonlinear excitation intensity dependence of this component is described by a simple model where, the Auger effect inside isolated silicon nanocrystallites plays the dominant role.
Thiol-Capped CdSe and CdTe Nanoclusters: Synthesis by a Wet Chemical Route, Structural and Optical Properties
Authors: Rogach A. L. , Eychmüller A , Rockenberger J. , Kornowski A. , Weller H. , Troger L. , Gao M. Y. , Harrison M. T. , Kershaw S. V. , Burt M. G. 
Published: May 2017

AbstractCdSe and CdTe nanoclusters were formed in aqueous solutions at moderate temperatures by a wet chemical route in the presence of thiols as effective stabilizing agents. The nature of the stabilizing agent (thioalcohols or thioacids) had an important influence on the particle size and largely determined the photoluminescence properties. The nanoclusters were characterized by means of UV-vis absorption and photoluminescence spectroscopy, powder X-ray diffraction, high resolution transmission electron microscopy, and extended X-ray absorption fine structure measurements. CdSe and CdTe nanoclusters were crystalline, in the cubic zincblende phase, with mean sizes in the range of 2 to 5 nm depending on the preparative conditions and the postpreparative size-selective fractionation, and showed pronounced electronic transitions in the absorption spectra. Thioglycerol-stabilized CdTe nanoclusters possessed sharp band-egde photoluminescence being tunable with particle size.
Femtosecond Interfacial Electron Transfer Dynamics of CdSe Semiconductor Nanoparticles
Authors: Burda C. , Green T C. , Link S. , El-Sayed M. A. 
Published: May 2017

AbstractThe effect of the adsorption of an electron donor (thiophenol, TP) on the surface of CdSe nanoparticles (NPs) on the emission and electron-hole dynamics is studied. It is found that while the emission is completely quenched, the effect on the transient bleach recovery of the band gap absorption is only slight. This is explained by a mechanism in which the hole in the valence band of the NP is rapidly neutralized by electron transfer from the TP. However, the excited electron in the conduction band is not transferred to the TP cation, i. e. the electron does not shuttle via the organic moiety as it does when naphthoquinone is adsorbed [1]. The excited electron is rather trapped by surface states. Thus the rate of bleach recovery in the CdSe NP system is determined by the rate of electron trapping and not by hole trapping. Comparable conclusions resulted previously [2] for the CdS NP when the CdS-MV2+ system is studied. A comparative discussion of the electron-hole dynamics in these systems (CdSe-NQ, CdS-MV2+ and CdSe-TP) is given.
Nucleation Processes in Si CVD on Ultrathin SiO2 Layers
Authors: Yasuda T. , Hwang D. S. , Ikuta K. , Yamasaki S. , Tanaka K. 
Published: May 2017

AbstractWe investigate nucleation densities in UHV-CVD of Si on ultrathin SiO2 layers (0.2-2 nm) which were prepared by three different oxidation methods: thermal, UV-ozone, and plasma oxidation. The experiments changing the Si2H6 pressure in UHV-CVD indicate that these oxide surfaces have preferred sites for nucleation. Among the three oxidation methods, the nucleation density, Ns, on the thermal oxide is the lowest, while the plasma oxide shows the highest Ns. These results suggest that strained bonds and ion-induced damages in the oxide layers assist nucleation. For UV-ozone and plasma oxides Ns is independent of orientation, reconstruction, and morphology of the initial Si surface.