bluuebunny/crossref_metadata_2025 huggingface dataset:
z ∼ 2: An Epoch of Disk Assembly
Authors: Simons Raymond C. , Kassin Susan A. , Weiner Benjamin J. , Faber Sandra M. , Trump Jonathan R. , Heckman Timothy M. , Koo David C. , Pacifici Camilla , Primack Joel R. , Snyder Gregory F. , Vega Alexander de la
Published: June 2017

We explore the evolution of the internal gas kinematics of star-forming galaxies from the peak of cosmic star formation at

z
∼
2

to today. Measurements of galaxy rotation velocity V
rot, which quantify ordered motions, and gas velocity dispersion

σ

g

, which quantify disordered motions, are adopted from the DEEP2 and SIGMA surveys. This sample covers a continuous baseline in redshift over

0.1

<

z

<

2.5

, spanning 10 Gyr. At low redshift, nearly all sufficiently massive star-forming galaxies are rotationally supported (

V

rot

>

σ

g

). By z = 2, 50% and 70% of galaxies are rotationally supported at low (

10

9

–

10

10

M

⊙

) and high (

10

10

–

10

11

M

⊙

) stellar mass, respectively. For

V

rot

>

3

σ

g

, the percentage drops below 35% for all masses. From z = 2 to now, galaxies exhibit remarkably smooth kinematic evolution on average. All galaxies tend toward rotational support with time, and higher-mass systems reach it earlier. This is largely due to a mass-independent decline in

σ

g

by a factor of 3 since z = 2. Over the same time period, V
rot increases by a factor of 1.5 in low-mass systems but does not evolve at high mass. These trends in V
rot and

σ

g

are at a fixed stellar mass and therefore should not be interpreted as evolutionary tracks for galaxy populations. When populations are linked in time via abundance matching,

σ

g

declines as before and V
rot strongly increases with time for all galaxy populations, enhancing the evolution in

V

rot

/

σ

g

. These results indicate that

z
=
2

is a period of disk assembly, during which strong rotational support is only just beginning to emerge.
Discovery of Variable Hydrogen Balmer Absorption Lines with Inverse Decrement in PG 1411+442
Authors: Shi Xi-Heng , Pan Xiang , Zhang Shao-Hua , Sun Lu-Ming , Wang Jian-Guo , Ji Tuo , Yang Chen-Wei , Liu Bo , Jiang Ning , Zhou Hong-Yan
Published: June 2017

We present new optical spectra of the well-known broad absorption line (BAL) quasar PG 1411+442, using the DBSP spectrograph at the Palomar 200 inch telescope in 2014 and 2017 and the YFOSC spectrograph at the Lijiang 2.4 m telescope in 2015. A blueshifted narrow absorption line system is clearly revealed in 2014 and 2015 consisting of hydrogen Balmer series and metastable He i lines. The velocity of these lines is similar to the centroid velocity of the UV BALs, suggesting that both originate from the outflow. The Balmer lines vary significantly between the two observations and vanished in 2017. They were also absent in the archived spectra obtained before 2001. The variation is thought to be driven by photoionization change. Besides, the absorption lines show inversed Balmer decrement, i.e., the apparent optical depths of higher-order Balmer absorption lines are larger than those of lower-order lines, which is inconsistent with the oscillator strengths of the transitions. We suggest that such anomalous line ratios can be naturally explained by the thermal structure of a background accretion disk, which allows the obscured part of the disk to contribute differently to the continuum flux at different wavelengths. High-resolution spectroscopic and photometric monitoring would be very useful to probe the structure of the accretion disk as well as the geometry and physical conditions of the outflow.
Repeating FRB 121102: Eight-year Fermi-LAT Upper Limits and Implications
Authors: Zhang Bin-Bin , Zhang Bing
Published: June 2017

The repeating fast radio burst (FRB) source that produced FRB 121102 was recently localized in a star-forming galaxy at z = 0.193, which is associated with an extended radio source at the burst location. One possibility is that the repeating FRBs are produced by a new-born magnetar, which also powers the radio nebula. If so, the magnetar may produce γ-ray emission due to magnetic dipolar spin-down. The luminosity depends on the magnetar spin parameters and age. We process the eight-year Fermi-LAT data at the position of FRB 121102 and place an energy flux upper limit of

in time bins with six-month intervals, and an accumulated energy flux upper limit of

over the eight-year span. The corresponding γ-ray luminosity upper limits are

and

for the time-resolved and time-integrated analyses, respectively. We discuss the implications of these limits on the young magnetar model.
Un corps social en travail
Authors: Goguel d'Allondans Thierry
Published: June 2017

Le travail social ne s’est pas construit en un jour. Il s’est nourri à la fois des idées de grands pédagogues issus de divers champs disciplinaires (philosophie, théologie, sociologie, psychologie, psychanalyse, anthropologie, entre autres). Il n’est pas inutile de revenir à ces références premières pour au moins trois raisons : elles contiennent les valeurs fondatrices du travail social, elles relèvent la permanence de la recherche dans ces domaines, elles irriguent une éthique du sujet très éloigné des logiques actuelles (management, compétences, performance, qualité…).
Chine : le travail social sous influences
Authors: Guo Wenjing
Published: June 2017

Au début du XX e siècle, l’introduction et le développement du travail social en Chine furent étroitement liés aux activités philanthropiques issues des missions religieuses chrétiennes. Cette tradition fut interrompue avec l’arrivée au pouvoir du Parti communiste et la fondation de la République Populaire de Chine en 1949. Aujourd’hui, la « confluence » du travail social avec la philanthropie et l’intérêt public semble de mise notamment dans l’objectif d’une mutualisation des ressources.
Ville et musique, essai d’historiographie critique
Authors: Campos Rémy
Published: June 2017

Cet essai tente de dégager les lignes de force organisant le champ des études sur la musique dans la ville, domaine que les historiens et les musicologues ont renouvelé en profondeur dans les trente dernières années. L’article distingue trois grands types d’approches : une histoire sociale s’interrogeant sur les relations réciproques de la ville et des musiques qui s’y font, une géographie historique attachée aux formes spatiales de la pratique musicale et enfin une analyse des paysages sonores insistant sur la dimension sensible des lieux. L’article s’efforce de dresser un bilan critique des propositions anglophones ( urban musicology, soundscape studies ) ainsi que des contributions en langue française en mettant un accent particulier sur les problèmes soulevés par des approches transdisciplinaires dont les dimensions théoriques ne sont que rarement explicitées.
El tema del sacerdote enamorado en El pecado del padre Mouret de Émile Zola y Doña Luz de Juan Valera: pasión, pecado, culpa y arrepentimiento
Authors: López López Carmen María
Published: June 2017

El objetivo de este artículo consiste en realizar un análisis crítico-comparado, con el fin de estudiar el tema del sacerdote enamorado en la novela del XIX a partir de dos autores: Émile Zola y Juan Valera. Para este propósito, se llevará a cabo un estudio de El pecado del padre Mouret (1875) de Zola y Doña Luz (1879) de Valera de acuerdo con una perspectiva tematológica. En síntesis, este artículo trata de ofrecer una interpretación sobre el sentido de la Ley de la Naturaleza (Lex Naturae) y la Ley de Dios (Lex Dei), para explicar el amor, el pecado, la culpa y el arrepentimiento del sacerdote enamorado en la obra literaria de Zola y Valera.
Azorín, enfermo y escritor, ante la medicina
Authors: Escartín Gual Montserrat
Published: June 2017

El artículo estudia la relación de Azorín con la enfermedad desde un enfoque distinto al que suele adoptar la crítica, que ha interpretado su presencia en la obra del novelista como metáfora de la crisis de fin de siglo. Nuestro trabajo la examina en términos científicos y reales, al ser la experiencia sufrida por el propio autor, quien proyecta su patología en personajes de ficción, que investigamos, además de exponer las características del mal, su terapéutica e interesarse por todo tipo de bibliografía médica, antigua y de su tiempo. En suma, el artículo revisa la enfermedad y los médicos como una constante en la literatura de Martínez Ruiz, que se traduce en artículos («La medicina», «El doctor»), novelas de juventud y madurez (Diario de un enfermo, 1901; El enfermo, 1943) o ensayos (Los médicos, 1966).
Parámetros para el estudio de la producción editorial en contextos de dictadura y emergencia cultural. La editorial Galaxia en el período 1951-1973
Authors: Martínez Tejero Cristina
Published: June 2017

Este artículo tiene como objeto el estudio de la producción de la editorial Galaxia, fundada en Vigo en 1950 y cuya primera obra es publicada en el año siguiente. A través de dos cortes temporales (1951-1967, 1967-1973), se realiza un análisis tipológico y cuantitativo de los títulos editados por esta casa, identificando las tendencias activas y cambios operados durante este período. Se tienen en cuenta tanto el número de ediciones o reediciones, como la lengua, el origen —según los factores formulados por José Lambert: producción, tradición e importación— y la tipología de las obras, realizando en este último caso estudios más detallados sobre las diferentes modalidades de ensayo/libro científico-técnico así como de la creación ficcional. Por último, se ofrecen conclusiones sobre la situación del campo editorial gallego y, en general, del proceso de emergencia del sistema cultural, recalcando la posibilidad de exportación de estos parámetros de análisis a contextos análogos.
Using Pervasive Computing for Sustainable Healthcare in an Aging Population
Authors: Wong Adam Ka Lok , Lo Man Fung
Published: June 2017

Statistics have shown that not only the proportion of elderly as part of the world's population is growing, but there also is a growing deficit of the working population compared to the retired population. Therefore, the provision for age-related medical conditions will put a heavy pressure on the healthcare system. This chapter discusses how pervasive computing can be used to help to achieve sustainability in healthcare for the elderly. Mobile devices can facilitate old adults to actively seek for health and nutrition information, beware of their vital signs, and follow an active life style in a safe manner. Light-weight wearable electronic devices can provide acute care and rehabilitation services to the elderly without causing a big impact to their quality of life. A model is suggested to integrate the use of pervasive computing in health education, health management, doctor support, and monitored rehabilitation at home.
A Quantitative Approach to Understanding the Mind of Children with Special Needs
Authors: Kingsley Arshine , Daniel Rhea Mariam , Thomas Cynthia Mary , Sriraam Natarajan , Kumar G. Pradeep
Published: June 2017

This paper uses data acquired from a visit to ASHA (Academy for Severe Handicaps and Autism), a charitable trust in Bengaluru. The response of the students at ASHA to three different games was obtained for statistical analysis. They were assessed on three different parameters namely time, accuracy and difficulty. A comparison was done between the response of the children at ASHA and the response of children without special needs to the same. It was quantitatively realised that children with special needs exhibited lower levels of accuracy and alertness, apart from taking a large amount of time to complete a certain task.
Locality-Awareness and Replication for an Adaptive CHORD to MANet
Authors: Cherbal Sarra , Boukerram Abdellah , Boubetra Abdelhak
Published: June 2017

Structured peer-to-peer (P2P) systems have shown over time a high performance to P2P users. They are typically applied on Internet and wired networks. On the other hand, the evolution of mobile devices and the popularity of infrastructure-less wireless networks as mobile ad-hoc networks (MANET), make of them an interesting underlay for P2P overlays. However, their energy consumption stills a critical element with limited-energy batteries, and the most principal cause of energy consumption is the immense overhead. The aim of this work is to apply the Chord protocol on MANET underlay, in order to benefit from the efficient content-sharing process and the infrastructure-less mobility. At the same time, this work aims to conserve a good level of energy consumption and network lifetime. Therefore, it proposes a novel mechanism of locality awareness and replication of data that attempts to improve the lookup efficiency and reduce the traffic overhead.
Weight Trusted Routing Mechanism for Hierarchical Mesh Environments
Authors: Rathee Geetanjali , Saini Hemraj
Published: June 2017

In this paper, we have proposed a technique to detect and eliminate the malicious/misbehaving nodes involved during routing path formation in hierarchical mesh environments. In this, dijkstra's shortest path routing algorithm is used whose weights are deliberated using certain parameters (i.e. node distance, node's previous interactions, packet loss percentage and trust values of each node) for providing the security against routing attacks. The malicious nodes involved during route discovery process are eliminated by calculating the trust of each node using Social Impact Theory Optimizer (SITO). Here, we have discussed the network performance trade-off caused by secure path formation in conventional methods and proposed a Weight Trusted Routing (WTR) mechanism for eliminating these issues (packet-loss ratio, end-to-end delay and route discovery delay). We have numerically simulated and compared the network metrics for both conventional and proposed approaches. Moreover, the proposed technique is validated by discussing an empirical study over routing attacks.
The Past, Present and Possible Future for Systems
Authors: Minati Gianfranco
Published: June 2017

In this article, the author briefly summarise the characteristics of the science of complexity or post- Bertalanffy General Systems. The author discusses the shift from considering systems as acquiring properties due to their explicit or supposed design, to self-organised, emergent systems. Characteristics, approaches to modelling and interventions to change vary in nature with the post-Bertalanffy Systemics. While new suitable models and approaches are under study in sciences, such as physics, chemistry, biology, mathematics, engineering, and neurosciences, the author detects significant backwardness when dealing with the complexity of social systems and related problems that are developing in the post-industrial age. These problems include economic crises, security, defence, privacy, managing prisons, and supporting development. Such social problems are inadequately faced by using classical Bertalanffy's systemic concepts or by simply transposing models and changing the meaning of variables. This inadequacy is based on the underestimation of the peculiarities of Human Systems that consist of complex interactions that allow coherence and are also cognitive, informal, learning, evolutionary, ecological and non-governable Luhmannian subsystems. The non-cultural or low-cultural accessibility of the approaches considered by the science of complexity contribute to this inadequacy. Finally, the author presents some comments on how the science of systems may further evolve by considering new types of systems and systemic properties such as systemic fields and quantum systems. He speculates about some possible future understanding of human social systems.
High-Temperature Corrosion of Aluminized Diffusion-Coating for Fe-Base Alloy in N2/H2O/H2S-Mixed Gas
Authors: Kim Min Jung , Lee Dong Bok
Published: June 2017

The pack-cementation is one of economical, efficient coating processes for Fe-base alloys. It can provide good protection against high-temperature oxidation and corrosion. In this study, the high-temperature corrosion behavior of the aluminized diffusion-coating on low-carbon T20 steel (Fe-2.0Cr-0.5Mo-0.8Mn-0.3S in at.%) was studied at 800 °C in N2/H2O/H2S-mixed gas. The aluminized coating consisted of Fe3Al. The aluminized T20 steel after corrosion at 800 °C for 10~100h in N2/H2O/H2S-mixed gases, the scale formed on the Fe3Al coating consisted primarily of α-Al2O3, Al2S3, FeAl2O4 and FeO, with relatively slow scaling rates. The Fe3Al intermetallics has reasonable corrosion-and oxidation-resistance, because it can form a protective alumina scale. Without the aluminized diffusion-coating, T20 steel corroded fast with serious scale failure. At the surface, coarse FeS grains with cracks formed. Since FeS has a very high concentration of cation vacancies, it grew fast through the outward diffusion of Fe2+ ions.
Phylogeography and sister group of Lupangus, a new genus for three new flightless allopatric forest litter weevils endemic to the Eastern Arc Mountains, Tanzania (Coleoptera: Curculionidae, Molytinae)
Authors: Grebennikov Vasily V.
Published: June 2017

This paper reports discovery of a new genus Lupangus gen. n. with three new flightless weevils endemic to the forests of the Eastern Arc Mountains in Tanzania: L. asterius sp. n. (East Usambara; the type species), L. jason sp. n. (Uluguru) and L. orpheus sp. n. (Udzungwa). Maximum Likelihood phylogenetic analyses using parts of mitochondrial (COI), nuclear ribosomal (28S) genes, as well as the nuclear spacer region (ITS2) from 46 terminals grouped together the reciprocally monophyletic Lupangus (3 terminals) and Typoderus (3 terminals), with all three clades strongly supported. Phylogenetic analysis of 32 COI-5’ sequences recovered Lupangus species as reciprocally monophyletic, with L. orpheus being the sister to the rest. Internal phylogeny within both L. jason and L. orpheus are geographically structured, while that of L. asterius is not. Temporal analysis of Lupangus evolution using COI-5’ data assessed under slow and fast substitution rate schemes estimated separation of mitochondrial lineages leading to three Lupangus species at about 7–8 Ma and about 1.9–2.1 Ma, respectively. Temporal analyses consistently failed to suggest correlation between the timing of Lupangus evolution and the late Pleistocene climatic fluctuations, thus rejecting the hypothesis of faunal interchanges during the wettest periods of the last million years. Applicability of flightless weevils for dispersal-vicariance analysis is reviewed, and their mostly undocumented and taxonomically entangled diversity in the Tanzanian Eastern Arc Mountains is briefly highlighted.
Evaluation of multiple datasets for producing snow-cover indicators for Canada
Authors: Fernandes R A , Zhou F , Song H
Published: June 2017

Snow Cover is an essential climate variable. Indicators of trends in the temporal and spatial patterns of snow cover are increasingly used to both monitoring climate variability and change and quantifying regional environmental conditions. However, the choice and
accuracy of the indicators are often determined by the input snow cover data. A survey of snow cover indicators is performed to identify both those that would satisfy user requirements over Canada in addition to the current practices for international reporting. Four different input data sets are
then used to generate snow cover indicators over a five year period (2006-2010): the Canadian Meteorological Centre snow depth analysis with systematic in-situ measurements; cloud free MODIS MOD10C1 snow cover product; NOAA Interactive Mapping Service 4km snow cover product; and CCRS/CMC snow cover
product that assimilated both CMC inputs and NOAA AVHRR satellite imagery. Then snow cover indicators, including snow cover onset and melt are evaluated through their sensitivity to documented data uncertainties, by comparison to continuous monitored in-situ sites, and through inter-comparison.
Recommendations for suitable indicators as a function of input dataset are provided.
Global Holomorphic Functions in Several Non-Commuting Variables II
Authors: Agler Jim , McCarthy John
Published: June 2017

We give a new proof that bounded non-commutative functions on polynomial polyhedra can be represented by a realization formula, a generalization of the transfer function realization formula for bounded analytic functions on the unit disk.
Ultra-low material loss microstructure fiber for terahertz guidance
Authors: Hasan Md. Rabiul , Ali S. , Emi S. A.
Published: June 2017

In this letter, we numerically demonstrate a hybrid-core microstructure fiber for low-loss terahertz guidance. Finite element method with circular perfectly matched layer boundary condition is applied to characterize the guiding properties. It is shown that by using a triangular-core inside a square lattice microstructure exhibits ultra-low effective material loss (EML) of 0.169 dB/cm and low confinement loss of 0.087 dB/cm at the operating frequency of 0.75 THz. We also discuss how other guiding properties including power fraction, single mode propagation and dispersion vary with changing of core diameter and operating frequencies. This low-loss microstructure fiber can be effectively used in numerous applications in the THz regime. Full Text: PDF ReferencesJ. J. Bai, J. N. Li, H. Zhang, H. Fang, S. J. Chang, "A porous terahertz fiber with randomly distributed air holes", Appl. Phys. B 103, 2 (2011). CrossRef S. Atakaramians, S. Afshar, B. M. Fischer, D. Abbott, T. M. Monro, "Porous fibers: a novel approach to low loss THz waveguides", Opt. Express 16, 12 (2008). CrossRef K. Wang, D. M. Mittleman, "Metal wires for terahertz wave guiding", Nature 432, 7015 (2004). CrossRef R. Islam, G. K. M. Hasanuzzaman, M. S. Habib, S. Rana, M. A. G. Khan, "Low-loss rotated porous core hexagonal single-mode fiber in THz regime", Opt. Fiber Technol. 24, (2015). CrossRef M. I. Hasan, S. M. A. Razzak, G. K. M. Hasanuzzaman, M. S.Habib, "Ultra-Low Material Loss and Dispersion Flattened Fiber for THz Transmission", IEEE Photon. Technol. Lett. 26, 23 (2014). CrossRef S. F. Kaijage, Z. Ouyang, X. Jin, "Porous-Core Photonic Crystal Fiber for Low Loss Terahertz Wave Guiding", IEEE Photon. Technol. Lett. 25, 15 (2013). CrossRef M. R. Hasan, M. A. Islam, A. A. Rifat, "A single mode porous-core square lattice photonic crystal fiber for THz wave propagation", J. Eur. Opt. Soc. Rapid Publ. 12, 1 (2016). CrossRef M. R. Hasan, M. A. Islam, M. S. Anower, S. M. A. Razzak, "Low-loss and bend-insensitive terahertz fiber using a rhombic-shaped core", Appl. Opt. 55, 30 (2016). CrossRef S. Ali et al. "Ultra-low loss THz waveguide with flat EML and near zero flat dispersion properties", in 9th Int. Conf. on Elect. and Comp. Eng., IEEE, (2016). CrossRef K. Nielsen, H. K. Rasmussen, A. J. Adam, P. C. Planken, O. Bang, P. U. Jepsen, "Bendable, low-loss Topas fibers for the terahertz frequency range", Opt. Express 17, 10 (2009). CrossRef A. W. Snyder, J. D. Love, Optical waveguide theory (London, Chapman & Hall 1983). DirectLink L. Vincetti, A. Polemi, in Antennas and Propagation Society International Symposium, IEEE (2009)G. P. Agrawal, Nonlinear fiber optics (Boston, Academic Press 1989). CrossRef B. S. Williams, "Terahertz quantum-cascade lasers", Nat. Photon. 1, 9 (2007). CrossRef H. W. Hubers et al. "Terahertz quantum cascade laser as local oscillator in a heterodyne receiver", Opt. Express 13, 15 (2005). CrossRef
Compression of computer-generated holograms in image projection
Authors: Kochańska Paula Adrianna , Makowski Michal
Published: June 2017

Computer-generated holography is a technique of a lossless and lens-less forming of images. Methods that use local devices to compute such holograms are very power- and time-consuming. In order to make it possible to transfer the calculations to the cloud, it is necessary to elaborate efficient algorithms of a lossless compression. In this paper two methods of compression are presented and supported by both simulation and experimental results. A lossy compression method omitting certain bit-planes of the holographic data is also presented, which allows insignificant loss of information, while achieving a greater compression ratio. Full Text: PDF ReferencesM. Makowski "Simple holographic projection in color.", Opt. Express 20, 25130-25136 (2012). CrossRef M. Makowski, I. Ducin, K. Kakarenko, J. Suszek, A. Kowalczyk, "Performance of the 4k phase-only spatial light modulator in image projection by computer-generated holography, " Phot. Lett. Poland 8, 26-28 (2016). CrossRef A. Kowalczyk, M. Bieda, M. Makowski, I. Ducin, K. Kakarenko, J. Suszek, A. Sobczyk, "Analysis of computational complexity in holographic lens-less projection," Phot. Lett. Poland 6, 84-86 (2014). CrossRef M. Makowski, "Minimized speckle noise in lens-less holographic projection by pixel separation," Opt. Express 21, 29205-29216 (2013). CrossRef H. Niwase, N. Takada, H. Araki, Y. Maeda, M. Fujiwara, H. Nakayama, T. Kakue, T. Shimobaba, T. Ito "Real-time electroholography using a multiple-graphics processing unit cluster system with a single spatial light modulator and the InfiniBand network." Opt. Eng. 55, 093108-093108 (2016). CrossRef T. Shimobaba and T. Ito, "Random phase-free computer-generated hologram", Opt. Express 23(7) 9549-9554 (2015) CrossRef S.R. Kodituwakku, "Comparison of lossless data compression algorithms for text data", Indian Journal of Computer Science and Engineering Vol 1 No 4 416-426 (2010) DirectLink
Electrical tuning of the LC:PDMS channels
Authors: Rutkowska Katarzyna Agnieszka , Woliński Tomasz R. , Asquini Rita , Civita Luca , Martini Luca , D Alessandro Antonio
Published: June 2017

In this paper studies on electrical tuning of optical channels formed by the PDMS-based waveguides infiltrated with liquid crystalline material are presented. In particular, preliminary results of numerical simulations demonstrating changes in optical parameters of the waveguide channels when influenced by electric field applied via flat and IPS electrodes are demonstrated in order to fabricate photonic switches based on optical directional couplers. First experimental trials of sputtering the ITO layer on PDMS substrate are also shown. Full Text: PDF ReferencesG. Wypych, Handbook of polymers (Elsevier 2016). CrossRef J.C. McDonald, D.C. Duffy, J.R. Anderson, D.T. Chiu, H. Wu, O.J. Schueller, G.M. Whitesides, "Fabrication of microfluidic systems in poly(dimethylsiloxane)", Electrophoresis 21, 27 (2000). CrossRef Y. Fainman, L. Lee, D. Psaltis, C. Yang, Optofluidics: fundamentals, devices, and applications (McGraw-Hill, Inc., 2009).I. Khoo, Liquid crystals: physical properties and nonlinear optical phenomena (John Wiley & Sons, 2007). CrossRef A. d'Alessandro, L. Martini, L. Civita, R. Beccherelli, R. Asquini, "Liquid crystal waveguide technologies for a new generation of low-power photonic integrated circuits", Proc. SPIE 9384, 93840L (2015). CrossRef R. Asquini, L. Martini, A. d'Alessandro, "Fabrication and Characterization of Liquid Crystal Waveguides in PDMS Channels for Optofluidic Applications", Mol. Cryst. Liquid Cryst. 614, 11 (2015). CrossRef B. Bellini, J. F. Larchanché, J. P. Vilcot, D. Decoster, R. Beccherelli, A. d'Alessandro, "Photonic devices based on preferential etching", Applied Optics, 44, (33), (2005). CrossRef L. De Sio, J.G. Cuennet, A.E. Vasdekis, D. Psaltis, "All-optical switching in an optofluidic polydimethylsiloxane: Liquid crystal grating defined by cast-molding", Appl. Phys. Lett. 96, 131112 (2010). CrossRef W. Zheng, L. Yang, M. Lee, "Vertical Alignment of Liquid Crytals on Polydimethylsiloxane Thin Films", Phot. Lett. Poland 3(1), 8 (2011). CrossRef Y. Saad, Iterative methods for sparse linear systems (SIAM, 2003). CrossRef F. Schneider, J. Draheim, R. Kamberger, U. Wallrabe, "Process and material properties of polydimethylsiloxane (PDMS) for Optical MEMS", Sensors Actuat. A: Physical 151, 95 (2009). CrossRef R. Asquini, A. d'Alessandro, "BPM Analysis of an Integrated Optical Switch using Polymeric Optical Waveguides and SSFLC at 1.55 ?m", Mol. Cryst. Liquid Cryst. 375, 243 (2002). CrossRef R. Asquini, L. Civita, L. Martini, A. d'Alessandro, "Design of Optical Directional Couplers Made of Polydimethysiloxane Liquid Crystal Channel Waveguides", Mol. Cryst. Liquid Cryst. 619, 12 (2015). CrossRef
Propuesta de modelo de enseñanza-aprendizaje de la historia en formación de maestros/as a través de la didáctica del objeto
Authors: Llonch Molina N.
Published: June 2017

El presente trabajo muestra una experiencia de didáctica de la historia en formación de maestros basada en el método por descubrimiento a partir de fuentes primarias y su eje estructurador es la didáctica del objeto y el aprendizaje-experimentación del método inductivo. La experiencia se ha llevado a cabo en dos cursos y ha implicado a 327 estudiantes.

El objetivo principal es el de desarrollar un modelo de enseñanza-aprendizaje de la historia para futuros docentes de educación primaria que les permita conocer metodologías didácticas alternativas a las habituales durante su escolarización.

Con el objetivo de evaluar la experiencia tanto desde el punto de vista de los resultados conseguidos como desde la perspectiva de la percepción del alumnado, por un lado, se muestran los resultados de las rúbricas de evaluación para las dos actividades principales, y, por el otro, se recoge la voz del alumnado a través de cuestionarios de respuesta cerrada, redacción de opiniones anónimas, apartados de algunos trabajos y comentarios en el blog Espai Híbrid.

La experiencia y los resultados obtenidos avalan el trabajo realizado tanto por las notas como porque el alumnado reconoce haber experimentado una manera distinta de aproximarse a la historia mucho más satisfactoria en términos de aprendizaje y disfrute de la materia y manifiesta la voluntad de implementar metodologías similares en su futura profesión.

La principal conclusión a la que llegamos es que la propuesta de modelo de enseñanza-aprendizaje de la historia, con sus correspondientes adaptaciones, es útil y aplicable a distintos niveles educativos.
Cross learning synergies between Operation Management content and the use of generic analytic tools
Authors: Marimon Frederic , Berbegal-Mirabent Jasmina
Published: June 2017

This work presents how the learning process of a chapter on Operations Management (Aggregated Production Planning), enables students achieving two objectivesat the same time : a) learning the specific contents of the chapter, and b) learning or improving their skills in the use of purposeful generic analytical tools (e.g., tables in Excel or the use of linear programming techniques).

By presenting both objectives simultaneously students are found to be more motivated towards working deeply in both objectives. Students know that the theoretical content will be put in practice through certain tools, strengthening the student's interest on the conceptual issues of the chapter. In turn, because students know that they will use a generic tool in a known context, their interests in these tools is reinforced. The result is a cross learning synergy.
An analysis of the causes of Master's Thesis dropouts
Authors: Alfalla Luque Rafaela , Garrido Vega Pedro , González Zamora María del Mar , Medina López Carmen , Sacristán Díaz Macarena
Published: June 2017

This paper addresses the reasons why a growing number of students are failing to complete their final master dissertations/thesis. It analyses the final Master's Course Thesis (TFM, Trabajo Fin de Máster) on the Masters in Advanced Business Management Studies course (MUEADE, Máster Universitario en Estudios Avanzados en Dirección de Empresas) at the University of Seville, which has a 100% success rate (the number of passes over students who completed the Master's Thesis). However, the same is not true of the performance rate (the number of students completing the thesis over the number of students enrolled on the course), which means that a large number of students do not receive their Master's Degrees. Using results from a survey of final year TFM students and of their course supervisors, this paper seeks to better understand the reasons why students are dropping out before completing their final thesis with a view to taking corrective actions.
Teaching experience of application of Kaizen in a company
Authors: Ceballos Cháve Blanca Alhely , Miguel-Dávila José Angel
Published: June 2017

The paper presents the relationship between teaching and business, highlighting the importance of training in the workplace. Specifically, the professional experience of one of the signers of the article is described when passing from student to graduate and work as an Industrial Engineer. Once in the company, when the problems were detected, a training program was elaborated to give a workshop on Kaizen that solved those problems. To this end, the workshop focused on the 5S methodology. The result was that it began to be implemented in the other plants of the company where the same problem existed.
Evaluating the impact of ERP systems on SC performance with ISM
Authors: López Vargas Cristina , López García Jenifer
Published: June 2017

Most companies nowadays have already implemented on-premise or cloud -based ERP systems into their IT infraestrutures. These packages allow firms to integrate, standardize and execute the whole business processes in real time, improving their productivity and operational efficiency. Previous studies highlight their beneficial effects go beyond the single firm. Indeed, ERP system can assist supply‐chain partners to work in close coordination. In order to reach a better understanding in this matter, the present study aims to develop a comprehensive framework. This will represent the benefits derived from ERP adoption in Supply Chain performance. In doing so, we applied an interpretive structural modelling (ISM). Finally, we provide a case study that explores the viability of this framework.
Starting Point on the Development of Environemental Risk Management Compe-tences: experiential learning
Authors: Martín Rubio Irene , Tarquis Ana María , Andina Diego
Published: June 2017

One of the characteristics of the European Space of Higher Education  is to consider university degrees in terms of learning outcomes, and essentially expressed in forms of competence. Competencies represent a dynamic combination of attributes such as knowledge and its application, attitudes and responsibilities that describe the learning outcomes of a particular program.

Transversal competences, such as competences towards environmental  risk management, are part of the general characteristics of human action in economic and technical environments.

The training, evaluation and development of professional competences can present different approaches and teaching-learning methodologies. In our study, we focus on learning from experience. With the evaluation of students' learning styles, we can begin to know how our students begin to develop their skills towards environmental risk management.
Presentation of Energy and Services Companies (Escos) Observatory in Spain
Authors: González Sanchez E , Martínez Beloto J , MARTÍN RUBIO Irene , Florence Sandoval Antonio E.
Published: June 2017

The Observatory on the Market of Energy Services Companies (ESEs) 2016 in Spain has been jointly conducted by ANESE and the Higher Technical School of Engineering and Industrial Design of  Technical  University of Madrid.

The core of the study was based on the analysis of the data obtained from a specifically designed questionnaire, which has been completed by numerous representatives of ESEs in Spain.

The questionnaire has allowed to study  the ESE market, showing a detailed vision of its true protagonists, the ESEs. In this way, it is possible to know the main opportunities and barriers for the development of the business.
Protocol: validation of the INCODE barometer to measure the innovation compe-tence through the Rasch Measurement Theory
Authors: Sanchez Lidia , Blanco Beatriz , Marín-García Juan A.
Published: June 2017

This communication presents a protocol in order to show the different phases that must be followed in order to validate the INCODE barometer, which is used to measure the innovation competence, with Rasch Measurement Theory. Five phases are stated: dimensionality analysis, individual reliability and validity analysis of ítems and persons, global reliability and validity analysis, and cathegory analysis.
Impacts of the Low-Level Jet's Negative Wind Shear on the Wind Turbine
Authors: Gutierrez Walter , Ruiz-Columbie Arquimedes , Tutkun Murat , Castillo Luciano
Published: June 2017

Abstract. Nocturnal Low Level Jets (LLJs) are defined as relative maxima in the vertical profile of the horizontal wind speed at the top of the stable boundary layer. Such peaks constitute major power resources for wind turbines. However, a wind speed maximum implies a transition from positive wind shears below the peak to negative ones above. The effect that such transition inflicts on wind turbines has not been thoroughly studied. High-frequency data of actual atmospheric LLJs were used as input to the NREL aeroelastic simulator FAST code, and simulations were performed with different vertical distances between the LLJ peak and the wind turbine hub. It was found that the presence of negative wind shears at the heights of the turbine appeared to exert a positive impact in reducing the motions of the nacelle and the tower in every direction, with oscillations reaching a minimum when negative shears covered completely the turbine sweeping area. Only the tower wobbling in the spanwise direction was amplified by the negative shears; however, this occurred at slower velocities and accelerations. The forces and moments were also reduced by the negative shears. The aforementioned impacts were less beneficial in the rotating parts such as the blades and the shafts. Finally, the power output was slightly more stable. Those findings can be very important for the next generation of wind turbines as they reach deeper into the heights of more LLJs.
Autologous Cultivated Limbal Stem Cell Transplantation after Failed Previous Limbal Graft
Authors: Knutsson Karl A. , Matuska Stanislav , Rama Paolo
Published: June 2017

Purpose

To describe a case of unilateral limbal stem cell deficiency (LSCD) with previously failed autologous graft, resolved by ocular surface reconstruction using cultured autologous limbal stem cells from the contralateral eye.

Case Report

A 35-year-old patient presented to our clinic with LSCD due to a unilateral alkali burn. The patient had received a previous limbal graft from the contralateral eye that had failed to impede corneal conjunctivalization. We decided to repeat limbal stem cell transplantation using an ex vivo cultivation procedure to reduce the risk of tissue harvesting on the healthy fellow eye. A small limbal biopsy (1.5 × 1.5 mm) near the previously excised limbus was performed. Stem cells were then isolated and cultured on fibrin and a 3T3 feeder cell layer using a standard protocol. Four months later, the cultivated cells on fibrin were grafted after pannus removal. In the subsequent months, the ocular surface stabilized and inflammation decreased. Two years later, the patient underwent large tectonic lamellar keratoplasty for severe corneal thinning involving the entire cornea, and 6 months later central penetrating keratoplasty and extracapsular cataract extraction with intraocular lens implantation and pupilloplasty was performed. Following reconstruction, the patient showed improved best-corrected vision from count fingers to 20/200 due to amblyopia, and the ocular surface was stable with a transparent corneal graft.

Conclusions

Ex vivo limbal stem cell transplantation is a valid technique for treating LSCD and can be utilized for treating patients who have had previous failed limbal grafts.
Prevalence and incidence of pulmonary arterial hypertension: 10-year follow-up of an unselected systemic sclerosis cohort
Authors: Vandecasteele Els , Melsens Karin , Thevissen Kristof , De Pauw Michel , Deschepper Ellen , Decuman Saskia , Piette Yves , De Keyser Filip , Brusselle Guy , Smith Vanessa
Published: June 2017

Introduction

Early screening for pulmonary arterial hypertension (PAH) in systemic sclerosis (SSc) improves outcome. Therefore, we evaluated the screening for PAH during the 10-year follow-up of an unselected prospective SSc cohort by calculating the prevalence and the incidence rate of PAH and we compared the screening before and after implementation of the 2009 European Society of Cardiology/European Respiratory Society (ESC/ERS) guidelines.

Methods

Data were evaluated from each SSc-specific visit of 362 consecutive SSc patients included in the SSc Cohort of the Ghent University between May 2006 and December 2015.

Results

Of the 362 included patients, 23.2% had limited SSc, 59.9% limited cutaneous SSc and 16.9% diffuse cutaneous SSc. At baseline, one patient was already on PAH-specific treatment and eight patients were diagnosed with PAH, implicating a baseline PAH prevalence of 2.5% (9/362). During follow-up (median of 18 months [interquartile range: 0-54 months]), nine patients were diagnosed with incidental PAH, resulting in an incidence rate of 9.3/1000 person-years, 95% confidence intervals (95% CI): 4.3-17.7. Before the ESC/ERS guidelines, five PAH patients, all already diagnosed with prevalent PAH, were included in the cohort. After 2009, 13 patients (4 prevalent cases) were diagnosed with PAH, making the yearly incidence around 1% (0.82%-2.00%).

Conclusions

During 10-year follow-up in a cohort of 362 unselected SSc patients, the cumulative prevalence of PAH is 5% (18/362) and the incidence rate 9.3/1000 person-years, 95% CI: 4.3-17.7. Before implementation of the 2009 ESC/ERS screening algorithm, there were no incident cases.
Central venous pressure monitoring via peripherally or centrally inserted central catheters: a systematic review and meta-analysis
Authors: Sanfilippo Filippo , Noto Alberto , Martucci Gennaro , Farbo Marco , Burgio Gaetano , Biasucci Daniele G.
Published: June 2017

Introduction

The central venous pressure (CVP) is the most commonly used static marker of preload for guiding fluid therapy in critically ill patients, though its usefulness remains controversial. Centrally inserted central catheters (CICCs) are the gold-standard devices for CVP monitoring but peripherally inserted central catheters (PICCs) may represent a valid alternative. We undertook a systematic review and meta-analysis with the aim to investigate whether the difference between PICC- and CICC-measured CVP is not significant.

Methods

We searched for clinical studies published in PubMed and EMBASE databases from inception until December 21st 2016. We included studies providing data on paired and simultaneous CVP measurement from PICCs and CICCs. We conducted two analyses on the values of CVP, the first one according to the total number of CVP assessments, the second one considering the number of patients recruited.

Results

Four studies matched the inclusion criteria, but only three of them provided data for the meta-analyses. Both analyses showed non-significant differences between PICC-measured and CICC-measured CVP: 1489 paired simultaneous CVP assessments (MD 0.16, 95%CI −0.14, 0.45, p = 0.30) on a total of 57 patients (MD 0.22, 95%CI −1.46, 1.91, p = 0.80). Both analyses showed no heterogeneity (I2 = 0%).

Conclusions

Available evidence supports that CVP monitoring with PICCs is accurate and reproduces similar values to those obtained from CICCs. The possibility to monitor CVP should not be used among clinical criteria for preferring a CICC over a PICC line.
Long-term clinical outcomes of the single-incision technique for implantation of implantable venous access ports via the axillary vein
Authors: Seo Tae-Seok , Song Myung Gyu , Kim Jun Suk , Choi Chul Won , Seo Jae Hong , Oh Sang Cheul , Kang Eun Joo , Lee Jae-Kwan , Lee Sung-yong
Published: June 2017

Purpose

To evaluate long-term clinical outcomes and complications of the single-incision technique for implantation of totally implantable venous access ports (TIVAPs) via the axillary vein.

Materials and Methods

A total of 932 TIVAPs were placed in 927 patients between May 2012 and October 2014 using a single-incision technique. Patients included 620 men and 307 women with a mean age of 60.0 years. TIVAPs were placed via the left (n = 475) and right (n = 457) axillary veins after making a single oblique vertical incision and medial side pocket without subcutaneous tunneling. We retrospectively reviewed medical records to evaluate status of the patients and TIVAPs, complications, and reasons for explantation. In patients who still had a TIVAP in place, we calculated the duration of TIVAP use from the cut-off day of November 1, 2015.

Results

Clinical follow-up was obtained for a total device service period of 311,069 days with a median indwelling time of 467 days (range: 3-1097 days). A total of 37 (4.0%) complications developed. Early complications (n = 4) were one case each of stenosis of the brachiocephalic vein by tumor growth, thrombosis of axillary vein, intravascular migration, and malfunction depending on patient's position. Late complications (n = 33) were suspected catheter-related blood stream infection (n = 23), local infection of the pocket (n = 4), symptomatic stenosis and thrombosis of central vein (n = 4), malfunction by fibrin sleeve (n = 1), and intravascular migration (n = 1).

Conclusions

A single-incision technique for TIVAP implantation via the axillary vein seems to be safe with a low risk of complication.
Perineal schwannoma: an unusual tumor and clinical presentation – first case with erectile dysfunction associated with this neoplasm
Authors: Cecconi Filippo , Maiolino Giuseppe , Lanzi Federico , Vittori Gianni , Gentile Filippo , Pizzirusso Gerardo , Barbanti Gabriele , Tripodi Sergio
Published: June 2017

Introduction:

Perineal schwannomas (PS) are very rare benign tumors with few cases reported in literature and none of these reports erectile dysfunction among clinical presentations.

Case description:

We report a case of PS with unusual clinical presentation showing erectile dysfunction associated with perineal pain and discomfort during defecation, and the postoperative residual pain and erectile dysfunction treatment.

Conclusions:

On the basis of a literature review of all cases reported and on our case reported, we have delineated a clinical, diagnostic, and therapeutic profile of PS, summarized in a useful table.
Comparison of Serum Vitamin D between Fertile and Infertile Men in A Vitamin D Deficient Endemic Area: A Case-Control Study
Authors: Akhavizadegan Hamed , Karbakhsh Mojgan
Published: June 2017

Introduction

The aim of this study was to compare serum vitamin D between fertile and infertile men in endemic area of vitamin D deficiency. The role of vitamin D in all aspects of human health has attracted a great interest. Vitamin D effect on female fertility and to a lesser extent in men is under investigation. Previous researchers have found meaningful positive relationship between semen quality and serum vitamin D level. However, in endemic area of vitamin D deficiency, this effect is under question.

Methods

Serum 25-OH-Vitamin D was compared between infertile male patients and fertile control group. Infertile cases were from patients of our infertility clinic and fertile controls from healthy cases with at least one child below 5 years of age. SPSS version 19 was used for statistical analysis (Kolmogorov-Smirnov test and Mann-Whitney test).

Results

Between 116 fertile and 114 infertile men who entered the study, serum level of 20 was a critical point, which patients with upper serum level had significantly better spermogram. In addition to it, even in vitamin D deficient patients and controls, fertile controls had higher serum vitamin D.

Conclusions

There is a positive correlation between serum level of vitamin D and spermogram quality, even in vitamin D deficient areas. Fertile people have a higher level of serum vitamin D in comparison to infertile patient in aforementioned areas.