bluuebunny/crossref_metadata_2025 huggingface dataset:
Ambiente virtual de aprendizagem: um recurso tecnológico utilizado com alunos do 1o ano do ensino médio
Authors: Costi Adriana , Valduga Márcia Fleck , Rehfeldt Márcia Jussara Hepp , Marchi Miriam Inês
Published: May 2018

Trazemos, neste artigo, o relato de uma prática realizada com 10 alunos do 1o ano do Ensino Médio de uma escola Estadual localizada na cidade de Santa Tereza/RS. Para a referida prática, foi construído um Ambiente Virtual de Aprendizagem com objetivos, atividades, fóruns, glossário, textos informativos e vídeos, a fim de que seja utilizado com os alunos como um recurso tecnológico. Neste relato também se apresenta a importância da utilização do Ambiente Virtual de Aprendizagem, bem como realiza-se uma análise sobre a atividade desenvolvida, a qual tem por base as respostas dos alunos a um questionário aplicado no final da prática. Tais respostas demonstraram não só o interesse e o entusiasmo dos estudantes durante a realização da prática, como também a percepção de que tais ferramentas facilitaram o processo de aprendizagem, tornando-o mais prazeroso.
Öğretmenlerin Bakış Açısıyla İlköğretimle Başlayan Matematik Korkusu Nedenlerinin ve Çözüm Önerilerinin İncelenmesi
Authors: Ertem Akbaş Elif
Published: May 2018

Bu çalışmada sınıf ve matematik öğretmenleri açısından
öğrencilerin ilköğretimle başlayan matematik korkularının nedenlerinin ve çözüm
önerilerinin araştırılması amaçlanmıştır. Bu doğrultuda çalışmada nitel
yaklaşıma dayanan durum çalışması yöntemi kullanılmıştır. Araştırmanın
katılımcıları 2017-2018 eğitim öğretim yılında Van ilinde bir ilköğretim
okulunda görev yapan 4 sınıf öğretmeni ve bir lisede görev yapan 7 matematik
öğretmeninden oluşmuş olup, bu öğretmenleri belirleme aşamasında amaçlı
örnekleme yöntemi kullanılmıştır. Araştırmada veri toplama aracı olarak yarı
yapılandırılmış mülakat soruları uygulanmış ve veri kaybı olmaması için mülakatlar
ses kayıt cihazı ile kaydedilmiştir. Mülakatlar öncelikle transkript haline
getirilmiş ve içerik analiz yöntemiyle analiz edilmiştir. Yapılan analizler
sonucunda sınıf öğretmenleri ve matematik öğretmenlerinden matematik korkusunun
temel nedenleri arasında çevresel faktörler, ders içeriği, öğrenci ve öğretmen
tutumu olduğu görülmüştür. Ayrıca sınıf öğretmenlerinden bu korkunun ilköğretim
kademesinde olmadığı, sınıf düzeyi arttıça oluştuğu sonucuna ulaşılmıştır.
Matematik öğretmenlerinden ilköğretimde okuma-yazma odaklı verilen eğitimin
öğrencilerde eksik temel matematik bilgisine ve matematik korkusuna neden
olacağına ulaşılmıştır. Bu korkuyu aşmak için öğretmen-öğrenci-veli
işbirliğine, tutumuna ve sistemde yer alan müfredatın düzeltilmesine ilişkin çözüm
önerileri sunulmuştur.
Outils et pratiques pour une compétence collective en situation
Authors: Gentil Pascale , Chédotel Frédérique
Published: May 2018

Pour favoriser la compétence collective et équiper les équipes d’outils de gestion simples et de pratiques génériques, la méthode agile se développe. Toutefois, la question de sa mise en œuvre a peu été étudiée. Une enquête exploratoire a permis d’analyser comment s’articulent outils, pratiques et compétence collective, à différents niveaux de l’organisation. Les auteurs proposent un modèle théorique, ainsi que des perspectives de recherche.
Impacts de l’auto-évaluation des compétences dans un hôpital luxembourgeois
Authors: Gartner Jean-Baptiste , Lemaire Célia , Merdinger-Rumpler Caroline
Published: May 2018

L’article participe à la compréhension d’une démarche de gestion des compétences par l’étude des impacts d’une auto-évaluation des compétences dans un hôpital luxembourgeois. À un niveau individuel, la prise de conscience de la complexité et de la variabilité du travail génère un effet de responsabilisation et d’autonomisation. À un niveau organisationnel, la formalisation de la cartographie des compétences favorise un pilotage dynamique des compétences, s’avère être un levier motivationnel et a un effet sur les déterminants de l’efficacité humaine.
Computer-aided analysis of middle cerebral artery tortuosity: association with aneurysm development
Authors: Kliś Kornelia M. , Krzyżewski Roger M. , Kwinta Borys M. , Stachura Krzysztof , Moskała Marek , Tomaszewski Krzysztof A.
Published: May 2018

OBJECTIVE

Blood vessel tortuosity may play an important role in the development of vessel abnormalities such as aneurysms. Currently, however, there are no studies analyzing the impact of brain blood vessel tortuosity on the risk of aneurysm formation. Therefore, the authors performed a computer-aided analysis of middle cerebral artery (MCA) tortuosity, especially among patients diagnosed with MCA aneurysms.

METHODS

Anatomy of the MCAs of 54 patients with unruptured MCA aneurysms was retrospectively analyzed, as was that of 54 sex-, age-, and vessel side–matched control patients without MCA aneurysms. From medical records, the authors obtained each patient’s medical history including previous and current diseases and medications. For each patient, they calculated the following tortuosity descriptors: relative length (RL), sum of angle metrics (SOAM), triangular index (TI), product of angle distance (PAD), and inflection count metric (ICM).

RESULTS

Patients with an MCA aneurysm had significantly lower RLs (0.75 ± 0.09 vs 0.83 ± 0.08, p < 0.01), SOAMs (0.45 ± 0.10 vs 0.60 ± 0.17, p < 0.01), and PADs (0.34 ± 0.09 vs 0.50 ± 0.17, p < 0.01). They also had significantly higher TIs (0.87 ± 0.04 vs 0.81 ± 0.07, p < 0.01) and ICMs (3.07 ± 1.58 vs 2.26 ± 1.12, p < 0.01). Female patients had significantly higher RLs (0.76 ± 0.11 vs 0.80 ± 0.09, p = 0.03) than male patients.

CONCLUSIONS

Middle cerebral artery aneurysm formation is strongly associated with blood vessel tortuosity parameters, which can potentially be used to screen for patients at risk for MCA aneurysm formation.
Methylprednisolone inhibits the proliferation of endogenous neural stem cells in nonhuman primates with spinal cord injury
Authors: Ye Jichao , Qin Yi , Tang Yong , Ma Mengjun , Wang Peng , Huang Lin , Yang Rui , Chen Keng , Chai Chaopeng , Wu Yanfeng , Shen Huiyong
Published: May 2018

OBJECTIVE

The aim of this work was to investigate the effects of methylprednisolone on the proliferation of endogenous neural stem cells (ENSCs) in nonhuman primates with spinal cord injury (SCI).

METHODS

A total of 14 healthy cynomolgus monkeys (Macaca fascicularis) (4–5 years of age) were randomly divided into 3 groups: the control group (n = 6), SCI group (n = 6), and methylprednisolone therapy group (n = 2). Only laminectomy was performed in the control animals at T-10. SCI was induced in monkeys using Allen’s weight-drop method (50 mm × 50 g) to injure the posterior portion of the spinal cord at T-10. In the methylprednisolone therapy group, monkeys were intravenously infused with methylprednisolone (30 mg/kg) immediately after SCI. All animals were intravenously infused with 5-bromo-2-deoxyuridine (BrdU) (50 mg/kg/day) for 3 days prior to study end point. The small intestine was dissected for immunohistochemical examination. After 3, 7, and 14 days, the spinal cord segments of the control and SCI groups were dissected to prepare frozen and paraffin sections. The proliferation of ENSCs was evaluated using BrdU and nestin immunofluorescence staining.

RESULTS

Histological examination showed that a larger number of mucosa epithelial cells in the small intestine of all groups were BrdU positive. Nestin-positive ependymal cells are increased around the central canal after SCI. After 3, 7, and 14 days of SCI, BrdU-positive ependymal cells in the SCI group were significantly increased compared with the control group, and the percentage of BrdU-positive cells in the left/right ventral horns and dorsal horn was significantly higher than that of the control group. Seven days after SCI, the percentages of both BrdU-positive ependymal cells around the central canal and BrdU– and nestin–double positive cells in the left/right ventral horns and dorsal horn were significantly lower in the methylprednisolone therapy group than in the SCI group.

CONCLUSIONS

While ENSCs proliferate significantly after SCI in nonhuman primates, methylprednisolone can inhibit the proliferation of ependymal cells after SCI.
Evaluation of lateral atlantodental interval asymmetry in the pediatric age group: normative values
Authors: Mendenhall Stephen K. , Huh Andrew , Pandya Janit , Alentado Vincent , Balsara Karl , Ho Chang , Jea Andrew
Published: May 2018

OBJECTIVE

The revelation of normative radiographic measurements for the developing pediatric spine is incomplete. The purpose of this analysis was to determine the normal range of asymmetry of the lateral atlantodental interval (LADI) and define age- and sex-related differences.

METHODS

A total of 3072 children aged 0–18 years who underwent CT scanning of the cervical spine were identified at Riley Hospital for Children between 2005 and 2017. Patients were stratified by sex and age (in years) into 36 cohorts. Following this stratification, patients within each group were randomly selected for inclusion until 15 patients in each group had been measured (quota sampling). A total of 540 patients were included for study. Right and left linear measurements were performed in the CT axial plane at the C-1 midlateral mass level.

RESULTS

The overall mean difference between the right and left LADI was 0.09 ± 1.23 mm (range -6.05 to 4.87 mm). The magnitude of this asymmetry remained statistically insignificant across age groups (p = 0.278) and sex (p = 0.889). The intraclass correlation coefficient was 0.805 (95% CI 0.779–0.829).

CONCLUSIONS

Asymmetry of the LADI is not unusual in asymptomatic children. There is no appreciable difference in magnitude of this asymmetry across age ranges and sex. Measurement of LADI asymmetry shows “good” reliability and is easy to perform. Pediatric neurosurgeons, emergency department physicians, and radiologists should be aware of normative values of asymmetry when interpreting CT scans of the cervical spine. This may prevent unnecessary further workup with dynamic CT or MRI.
Blinded by Gold: Toronto Sports Community Ignores Negative Legacies of 2015 Pan Am Games
Authors: Orr Madeleine , Jarvis Nigel
Published: May 2018

Event organizers and city officials often justify the high costs of hosting an event by highlighting its legacies. Legacies are a topic of contentious discourse among event researchers, over definition, measurement, and significance. The bid for the Toronto 2015 Pan Am Games highlighted
sport legacies as a priority. Thirteen semistructured qualitative interviews were conducted with organizers, city officials, and members of the Toronto sports community. These interviews were analyzed using a thematic coding method. The degree of familiarity with "event legacies" among respondents
varied, as did the definitions they offered. Multiple positive legacies were highlighted, most frequently: new or improved sports facilities and equipment (11/13 respondents), increased awareness of sport and sport opportunities (9/13), and inspiration factor (7/13). No respondent named negative
legacies. Two major themes emerged: 1) there is no universal understanding of legacies as a term or concept; and 2) organizers are biased when asked about legacies, favoring the positive, and ignoring the negative.
SN 2012fr: Ultraviolet, Optical, and Near-infrared Light Curves of a Type Ia Supernova Observed within a Day of Explosion*
Authors: Contreras Carlos , Phillips M. M. , Burns Christopher R. , Piro Anthony L. , Shappee B. J. , Stritzinger Maximilian D. , Baltay C. , Brown Peter J. , Conseil Emmanuel , Klotz Alain , Nugent Peter E. , Turpin Damien , Parker Stu , Rabinowitz D. , Hsiao Eric Y. , Morrell Nidia , Campillay Abdo , Castellón Sergio , Corco Carlos , González Consuelo , Krisciunas Kevin , Serón Jacqueline , Tucker Brad E. , Walker E. S. , Baron E. , Cain C. , Childress Michael J. , Folatelli Gastón , Freedman Wendy L. , Hamuy Mario , Hoeflich P. , Persson S. E. , Scalzo Richard , Schmidt Brian , Suntzeff Nicholas B.
Published: May 2018

We present detailed ultraviolet, optical, and near-infrared light curves of the Type Ia supernova (SN) 2012fr, which exploded in the Fornax cluster member NGC 1365. These precise high-cadence light curves provide a dense coverage of the flux evolution from −12 to +140 days with respect to the epoch of B-band maximum (

t

B

max

). Supplementary imaging at the earliest epochs reveals an initial slow and nearly linear rise in luminosity with a duration of ∼2.5 days, followed by a faster rising phase that is well reproduced by an explosion model with a moderate amount of 56Ni mixing in the ejecta. From our analysis of the light curves, we conclude that: (i) the explosion occurred <22 hr before the first detection of the supernova, (ii) the rise time to peak bolometric (λ > 1800 Å) luminosity was 16.5 ± 0.6 days, (iii) the supernova suffered little or no host-galaxy dust reddening, (iv) the peak luminosity in both the optical and near-infrared was consistent with the bright end of normal Type Ia diversity, and (v) 0.60 ± 0.15 M
⊙ of 56Ni was synthesized in the explosion. Despite its normal luminosity, SN 2012fr displayed unusually prevalent high-velocity Ca ii and Si ii absorption features, and a nearly constant photospheric velocity of the Si ii
λ6355 line at ∼12,000

km

s

−
1

that began ∼5 days before

t

B

max

. We also highlight some of the other peculiarities in the early phase photometry and the spectral evolution. SN 2012fr also adds to a growing number of Type Ia supernovae that are hosted by galaxies with direct Cepheid distance measurements.
Unambiguous Evidence of Coronal Implosions during Solar Eruptions and Flares
Authors: Wang Juntao , Simões P. J. A. , Fletcher L.
Published: May 2018

In the implosion conjecture, coronal loops contract as the result of magnetic energy release in solar eruptions and flares. However, after almost two decades, observations of this phenomenon are still rare and most previous reports are plagued by projection effects so that loop contraction could be either true implosion or just a change in loop inclination. In this paper, to demonstrate the reality of loop contractions in the global coronal dynamics, we present four events with the continuously contracting loops in an almost edge-on geometry from the perspective of SDO/AIA, which are free from the ambiguity caused by the projection effects, also supplemented by contemporary observations from STEREO for examination. In the wider context of observations, simulations and theories, we argue that the implosion conjecture is valid in interpreting these events. Furthermore, distinct properties of the events allow us to identify two physical categories of implosion. One type demonstrates a rapid contraction at the beginning of the flare impulsive phase, as magnetic free energy is removed rapidly by a filament eruption. The other type, which has no visible eruption, shows a continuous loop shrinkage during the entire flare impulsive phase, which we suggest shows the ongoing conversion of magnetic free energy in a coronal volume. Corresponding scenarios are described that can provide reasonable explanations for the observations. We also point out that implosions may be suppressed in cases when a heavily mass-loaded filament is involved, possibly serving as an alternative account for their observational rarity.
Arbitrary-order Hilbert Spectral Analysis and Intermittency in Solar Wind Density Fluctuations
Authors: Carbone Francesco , Sorriso-Valvo Luca , Alberti Tommaso , Lepreti Fabio , Chen Christopher H. K. , Němeček Zdenek , Šafránková Jana
Published: May 2018

The properties of inertial- and kinetic-range solar wind turbulence have been investigated with the arbitrary-order Hilbert spectral analysis method, applied to high-resolution density measurements. Due to the small sample size and to the presence of strong nonstationary behavior and large-scale structures, the classical analysis in terms of structure functions may prove to be unsuccessful in detecting the power-law behavior in the inertial range, and may underestimate the scaling exponents. However, the Hilbert spectral method provides an optimal estimation of the scaling exponents, which have been found to be close to those for velocity fluctuations in fully developed hydrodynamic turbulence. At smaller scales, below the proton gyroscale, the system loses its intermittent multiscaling properties and converges to a monofractal process. The resulting scaling exponents, obtained at small scales, are in good agreement with those of classical fractional Brownian motion, indicating a long-term memory in the process, and the absence of correlations around the spectral-break scale. These results provide important constraints on models of kinetic-range turbulence in the solar wind.
Jet Launching in Resistive GR-MHD Black Hole–Accretion Disk Systems
Authors: Qian 钱 Qian 前 , Fendt Christian , Vourellis Christos
Published: May 2018

We investigate the launching mechanism of relativistic jets from black hole sources, in particular the strong winds from the surrounding accretion disk. Numerical investigations of the disk wind launching—the simulation of the accretion–ejection transition—have so far almost only been done for nonrelativistic systems. From these simulations we know that resistivity, or magnetic diffusivity, plays an important role for the launching process. Here we extend this treatment to general relativistic magnetohydrodynamics (GR-MHD), applying the resistive GR-MHD code rHARM. Our model setup considers a thin accretion disk threaded by a large-scale open magnetic field. We run a series of simulations with different Kerr parameter, field strength, and diffusivity level. Indeed, we find strong disk winds with, however, mildly relativistic speed, the latter most probably due to our limited computational domain. Further, we find that magnetic diffusivity lowers the efficiency of accretion and ejection, as it weakens the efficiency of the magnetic lever arm of the disk wind. As a major driving force of the disk wind we disentangle the toroidal magnetic field pressure gradient; however, magnetocentrifugal driving may also contribute. Black hole rotation in our simulations suppresses the accretion rate owing to an enhanced toroidal magnetic field pressure that seems to be induced by frame dragging. Comparing the energy fluxes from the Blandford–Znajek-driven central spine and the surrounding disk wind, we find that the total electromagnetic energy flux is dominated by the total matter energy flux of the disk wind (by a factor of 20). The kinetic energy flux of the matter outflow is comparatively small and comparable to the Blandford–Znajek electromagnetic energy flux.
TrIAS, leveraging citizen science data to monitor invasive species in Belgium
Authors: Groom Quentin , Adriaens Tim , Oldoni Damiano , Reyserhove Lien , Strubbe Diederik , Vanderhoeven Sonia , Desmet Peter
Published: May 2018

Reducing the damage caused by invasive species requires a community approach informed by rapidly mobilized data. Even if local stakeholders work together, invasive species do not respect borders, and national, continental and global policies are required. Yet, in general, data on invasive species are slow to be mobilized, often of insufficient quality for their intended application and distributed among many stakeholders and their organizations, including scientists, land managers, and citizen scientists. The Belgian situation is typical. We struggle with the fragmentation of data sources and restrictions to data mobility. Nevertheless, there is a common view that the issue of invasive alien species needs to be addressed. In 2017 we launched the Tracking Invasive Alien Species (TrIAS) project, which envisages a future where alien species data are rapidly mobilized, the spread of exotic species is regularly monitored, and potential impacts and risks are rapidly evaluated in support of policy decisions (Vanderhoeven et al. 2017). TrIAS is building a seamless, data-driven workflow, from raw data to policy support documentation. TrIAS brings together 21 different stakeholder organizations that covering all organisms in the terrestrial, freshwater and marine environments. These organizations also include those involved in citizen science, research and wildlife management.

TrIAS is an Open Science project and all the software, data and documentation are being shared openly (Groom et al. 2018). This means that the workflow can be reused as a whole or in part, either after the project or in different countries. We hope to prove that rapid data workflows are not only an indispensable tool in the control of invasive species, but also for integrating and motivating the citizens and organizations involved.
Introducing the Global Register of Introduced and Invasive Species: challenges with classification
Authors: Pagad Shyama
Published: May 2018

The Global Register of Introduced and Invasive Species (GRIIS) presents annotated country checklists of introduced and invasive species. Annotations include higher taxonomy of the species, synonyms, environment/system in which the species occurs, and its biological status in that country. Invasiveness is classified by evidenced impact in that country. Draft country checklists are subjected to a process of validation and verification by networks of country experts. Challenges encountered across the world include confusion with alien/invasive species terminology, classification of the ‘invasive’ status of an alien species and issues with taxonomic synonyms.
Sample Management Across the National Ecological Observatory Network
Authors: Laney Christine , LeVan Katherine , Lunch Claire , Thibault Katherine
Published: May 2018

From 81 study sites across the United States, the US National Ecological Observatory Network (NEON), generates >75,000 samples per year. Samples range from soil and dust deposition material, tissue samples (e.g., small mammals and fish), DNA extracts, and whole organisms (e.g., ground beetles and ticks). Samples are collected, processed, and documented according to protocols that are standardized across study sites and according to the needs of the ecological research community for future studies. NEON has faced numerous challenges with managing data related to these many diverse physical samples, particularly when data are gathered at numerous steps throughout processing. Here, we share these challenges as well as solutions, including innovative semantically driven software tools and processing pipelines that manage data from each sample's point of collection to its ultimate fate (consumption, archive facility, or partnering data repository) while maintaining links across sample hierarchies.
Involving Collection Staff in the DINA Software Development – An Agile Approach
Authors: Englund Markus , Heikkinen Mikko , Sundström Lisa
Published: May 2018

In order to ensure long-term commitment to the DINA project (“DIgital information system for NAtural history data”, https://dina-project.net), it is essential to continuously deliver features of high value to the user community. This is also what agile software development methods try to achieve by emphasizing early delivery, rapid response to changes and close collaboration with users (see for example the Manifesto for Agile Software Development at http://agilemanifesto.org). We will give a brief overview on how current development of the DINA collection management system core is guided by agile principles. The mammal collection at the Swedish Museum of Natural History will be used as an example.

Developing a cross-disciplinary collection management system is a complex task that poses many challenges: Which features should we focus on? What kinds of data should the system ultimately support? How can the system be flexible but still easy to use? Since we cannot do everything at once, we work towards a minimum viable product (MVP) that contains just enough features at a time to bring value for selected target users. In the mammal collection case, the MVP is the simplest product that is able to replace the functions of the current system used for managing the collection. As we begin to work with other collections, new MVPs are defined and used to guide further development. Thus, the set of features available will increase with each MVP, benefiting both new and current users.

Another big challenge is migration of legacy data, which is labor intensive and involves standardizing data that are not compatible with the new system. To address these issues, we aim to build a flexible data model that allows less structured data to coexist with more complex, highly structured data. Migration should thus not require extensive data standardization, transformation and cleaning. The plan is to instead offer tools for transforming and cleaning the data after they have been imported. With the data in place, it will be easier for the user to provide feedback and suggest new features.
General introduction to DINA
Authors: Macklin James , Englund Markus , Glöckler Falko , Heikkinen Mikko , Hoffmann Jana , Newton Keith , Ronquist Fredrick
Published: May 2018

The DINA Consortium (“DIgital information system for NAtural history data”, https://dina-project.net, Fig. 1) was formed in order to provide a framework for like-minded large natural history collection-holding institutions to collaborate through a distributed Open Source development model to produce a flexible and sustainable collection management system. Target collections include zoological, botanical, mycological, geological and paleontological collections, living collections, biodiversity inventories, observation records, and molecular data.

The DINA system is architected as a loosely-coupled set of several web-based modules. The conceptual basis for this modular ecosystem is a compilation of comprehensive guidelines for Web application programming interfaces (APIs) to guarantee the interoperability of its components. Thus, all DINA components can be modified or even replaced by other components without crashing the rest of the system as long as they are DINA compliant. Furthermore, the modularity enables the institutions to host only the components they need. DINA focuses on an Open Source software philosophy and on community-driven open development, so the contributors share their development resources and expertise outside of their own institutions.

One of the overarching reasons to develop a new collection management system is the need to better model complex relationships between collection objects (typically specimens) involving their derivatives, preparations and storage. We will discuss enhancements made in the DINA data model to better represent these relationships and the influence it has on the management of these objects, and on the sharing of information. Technical detail of various components of the DINA system will be shown in other talks in this symposium followed by a discussion session.
L’ennui comme disposition adolescente aux frontières
Authors: de Luca Manuella
Published: May 2018

L’ennui se situe comme un affect aux frontières nosographiques parce qu’il interroge le normal et le pathologique. À l’adolescence, il est particulièrement fréquent et accompagne les jeunes sur leur temps libre comme à l’école. L’ennui problématise la question des limites si précaire à cette période de la vie en ce qu’il met en tension la dialectique actif-passif et soutient la différenciation soi et autrui. À l’appui d’une clinique en institution psychiatrique, l’auteure propose une lecture de l’ennui qui peut à la fois être une mise en forme d’un objet qui fait défaut et un support de régulation des excitations internes et externes conduisant à une subjectivation plus tempérée mettant en évidence les deux facettes effractante et défensive que revêt cet affect spécifique de l’être humain dans son rapport au temps.
L’ennui au travail : étape ou obstacle à la sublimation ?
Authors: Gernet Isabelle
Published: May 2018

L’ennui au travail est abordé en tant que forme de psychopathologie liée aux transformations contemporaines de l’organisation du travail. La mise en perspective avec d’autres formes d’entités cliniques modernes, comme le burn out ou encore le bore out , permet de mettre en discussion le statut métapsychologique de l’ennui, d’une part, son rôle dans la dynamique de la sublimation d’autre part.
Des machines et des hommes : un duo indissociable ?
Authors: Huerre Patrice
Published: May 2018

Les outils numériques font désormais partie de nos vies. Les institutions de soin n’échappent pas à la règle. Mais qu’en font-elles ? Les mettent-elles au ban des soins ? Leur font-elles une place médiatrice ? Telles sont les questions qui concernent les professionnels de la santé afin que la « révolution » numérique devienne un avantage et non une concurrence jugée déloyale. L’auteur propose une réflexion sur les vertus thérapeutiques des médiations de type numérique auprès d’adolescents hospitalisés notamment, en appui sur les travaux récents sur les nouvelles technologies.
Le rituel échographique en maternité. Le non-humain, l’enfant virtuel et le « devenir parent »
Authors: Missonnier Sylvain
Published: May 2018

L’environnement non humain dans le paysage relationnel quotidien est tout autant en évidence que trop souvent perçu sans grande valeur pour le travail de subjectivation. Une observation clinique attentive démontre tout le contraire : il constitue d’autant plus une part de l’essentiel de la réalité psychique et des liens humains qu’il est en négatif manifestement refoulé sinon dénié. Le scénario désormais coutumier des échographies obstétricales offre une illustration typique de ce paradoxe : une perception banalisante menace de le transformer en support d’aliénation, là, précisément, où la reconnaissance de son rôle éminent dans la construction et la créativité des liens permettra d’en conquérir l’étayage civilisateur. Un récit clinique témoignera de ces conflits, sources du meilleur comme du pire.
A proposal for a green supply chain strategy
Authors: Pinto Taborga Carola , Lusa Amaia , Coves Anna Maria
Published: May 2018

Purpose: The purpose of this paper is to establish a set of steps for helping companies to create a Green Supply Chain Strategy based on the reduction of their carbon footprint. The aim is to put forward a simple guideline that companies can follow and guide them in achieving their carbon emission targets, as well as obtaining attractive supply chain savings.Design/methodology/approach: Based on a literature review and benchmarking this paper proposes a methodology based on three pillars: 1) Corporate Carbon Strategy; 2) Carbon emission roadmap; and 3) Implementation and tracking. Analytic Hierarchy Process (AHP) techniques were used in order to create a green strategy and support the decision-making processes to select the most interesting alternatives for carbon emission reduction and supply chain savings. The supply chain of a metallurgical company is used to illustrate the case study where the proposed methodology is used. The criteria used for the carbon alternatives selection was based on three factors: 1) the supply chain cost of the alternative; 2) carbon emission impact in terms of CO2 tonnes; and 3) marketing effect.Findings: The paper identifies some specific steps for developing a Green Supply Chain Strategy. The case study developed, demonstrates the importance of following a proper methodology based on a set of steps, it also demonstrates that some alternatives focus on improving the supply chain, such as the facilities location, can also improve the key performance indicator related with carbon emission. Originality/value: The study provides guidance for manufacturing companies in implementing their Green Supply Chain Strategy.
Appearance of β-dystroglycan precedes the formation of glio-vascular end-feet in developing rat brain
Authors: Kálmán Mihály , Oszwald Erzsébet , Adorján István
Published: May 2018

Dystroglycan has an important role in binding of perivascular glial end-feet tothe basal lamina. Its β-subunit is localized in the glial end-feet. The investigation period lasted from E(embryonic day)12 to E20. Laminin and β-dystroglycan were detected by immunohistochemistry, the glial localization of the latter one was supported  by electron microscopy. The immatureglial structures were visualized by the immunostaining of nestin. The β-dystroglycan immunoreactivity appeared at E16 following the laminin of basal lamina but preceding the perivascular processes of radial glia (E18) and astrocyte-like cells (E20). It occurred in cell bodies which attached to the vessels directly but not with vascular processes and end-feet. The presence of β-dystroglycan in such immature cells may promote their differentiation to perivascular astrocytes and influence the formation of the glio-vascular processes.
New populations and a conservation assessment of Ecbolium hastatum Vollesen
Authors: McCleland Warren , Massingue Alice
Published: May 2018

Background: Ecbolium hastatum Vollesen is currently known from only three collections in southern Mozambique and has not been relocated since 1970.Objectives: To document two new populations and a small range extension for this poorly known species, and to provide a much-needed assessment of its conservation status.Method: The new populations were found by the first author (W.M.) while conducting floristic surveys of coastal thicket vegetation between Inhassoro and Vilanculos in December 2016, and during ongoing surveys by the second author (A.M.) of coastal thicket between Ponta de Ouro and Inhassoro. No voucher specimens were collected for the northern population, but photographs of key features were taken and compared with specimens in online herbaria. A voucher specimen was taken for the southern population.Results: Two new populations and a northern range extension for E. hastatum are recorded. The species is assessed as Endangered EN B2ab(iii) according to International Union for Conservation of Nature (IUCN) Criteria. Only one of the five known localities for this species is protected.Conclusion: The conservation assessment of this species highlights the importance of coastaldune thicket for range-restricted species in southern Mozambique.
Evaluating a smartphone digits-in-noise test as part of the audiometric test battery
Authors: Potgieter Jenni-Mari , Swanepoel De Wet , Smits Cas
Published: May 2018

Background: Speech-in-noise tests have become a valuable part of the audiometric test battery providing an indication of a listener’s ability to function in background noise. A simple digits-in-noise (DIN) test could be valuable to support diagnostic hearing assessments, hearing aid fittings and counselling for both paediatric and adult populations. Objective: The objective of this study was to evaluate the South African English smartphone DIN test’s performance as part of the audiometric test battery. Design: This descriptive study evaluated 109 adult subjects (43 male and 66 female subjects) with and without sensorineural hearing loss by comparing pure-tone air conduction thresholds, speech recognition monaural performance scores (SRS dB) and the DIN speech reception threshold (SRT). An additional nine adult hearing aid users (four male and five female subjects) were included in a subset to determine aided and unaided DIN SRTs. Results: The DIN SRT is strongly associated with the best ear 4 frequency pure-tone average (4FPTA) (rs = 0.81) and maximum SRS dB (r = 0.72). The DIN test had high sensitivity and specificity to identify abnormal pure-tone (0.88 and 0.88, respectively) and SRS dB (0.76 and 0.88, respectively) results. There was a mean signal-to-noise ratio (SNR) improvement in the aided condition that demonstrated an overall benefit of 0.84 SNR dB. Conclusion: The DIN SRT was significantly correlated with the best ear 4FPTA and maximum SRS dB. The DIN SRT provides a useful measure of speech recognition in noise that can evaluate hearing aid fittings, manage counselling and hearing expectations.
Influence of self-motivation and intrinsic motivational factors for small and medium business growth: A South African case study
Authors: Ncube Thandukwazi R. , Zondo Robert W.D.
Published: May 2018

Background: This study investigates the influence of intrinsic motivational factors for small and medium enterprise (SME) growth in the eThekwini District Municipality in South Africa (SA). Aim: It examines whether self-motivation of business owners operating in the furniture manufacturing sector has an influence on SME growth. Setting: Of the 127 SMEs operating in the eThekwini District Municipality, 112 participated in the study representing 88% of the target population. Methods: Descriptive, chi-square and correlative analyses were used to test the two objectives. That is, to determine the influence of self-motivation of business owners for SME growth, as well as to establish the intrinsic motivational factors that stimulate creativity for SME growth. Results: The study revealed that the intrinsic motivational factors of business owners do influence SME growth in SA. These factors include exerting effort for business growth interest, finding new solutions to business problems to achieve growth, growing business for recognition, belief to produce the desired outcomes, taking responsibilities for business expansion, the need for advancement, and growth aspiration that enables the business owner to take risks in order to grow the business. Conclusion: The outcome is that a self-motivated business owner has the ability to grow the business. The study provides valuable data relating to intrinsic motivational factors. Such factors are the enablers of creativity and business growth. It provides initial baseline data upon which to base future work.
Extending green supply chain management activities to manufacturing small and medium enterprises in a developing economy
Authors: Mafini Chengedzai , Loury-Okoumba Welby V.
Published: May 2018

Background: The implementation of green supply chain management activities as a business strategy remains unfamiliar to many small and medium enterprises (SMEs) in developing countries such as South Africa. Setting: Implementation of green supply chain management activities by South African SMEs is necessary, given both the high failure rate of such enterprises in the country and the proven ability of such activities to promote the success of businesses. Aim: The aim of this study was to investigate the relationship between green supply chain management activities, operational performance and supply chain performance in manufacturing SMEs in South Africa. Methods: Data were collected from 219 manufacturing SMEs operating within Gauteng. A confirmatory factor analysis was conducted to assess the psychometric properties of measurement scales. Hypotheses were tested using structural equation modelling. Results: Four green supply chain management activities, namely green purchasing, reverse logistics, environmental collaboration with suppliers and green manufacturing, exerted a positive influence on operational performance. Environmental collaboration with suppliers exerted the highest influence on operational performance when compared to green purchasing, reverse logistics and green manufacturing. In turn, operational performance exerted a strong positive influence on supply chain performance. Conclusion: The results of the study suggest that manufacturing SMEs in developing countries could benefit by adopting green supply chain management activities, with improvements being realised in terms of increases in both operational and supply chain performance.
Pictorial essay: Computed tomography findings in acute aortic syndromes
Authors: Singh Navdeep , Goel Pankaj , Singh Yadwinder
Published: May 2018

Acute aortic emergencies are life-threatening conditions that may require urgent surgical or interventional management. Imaging plays an important role in the diagnosis and planning of the management, and timely intervention helps in reducing mortality and morbidity.
Prediction for pathological image with convolutional neural network
Authors: Yin Wenshe , Hu Yangsheng , Dong Qingqing , Yi Sanli , Zhang Jun , He Jianfeng
Published: May 2018

ABSTRACT

Background and Objectives:

The diagnosis of cancer is concerned, and the prediction of cell carcinoma is of great importance for the treatment.

Materials and Methods:

First, we obtain a series of slices of tumor cell pathology in clinical data, with being followed training sets and test sets gained by adding data model. Then, we design a convolutional neural network training and prediction model. After that, we optimize parameters for training and prediction model, combining experience.

Results:

In experiment, the accuracy of the model predicting for cell carcinoma is 87.38%.

Conclusions:

This study provides a reference that predicts the extent of cell carcinoma progression by using deep learning model.
Trusted Spotter Network Austria – a new standard to utilize crowdsourced weather and impact observations
Authors: Krennert Thomas , Kaltenberger Rainer , Pistotnik Georg , Holzer Alois M. , Zeiler Franz , Stampfl Mathias
Published: May 2018

Abstract. Information from voluntary storm spotters has been an increasingly important
part for the severe weather warning process at the Zentralanstalt für
Meteorologie and Geodynamik (ZAMG), Austria's National Weather Service, for
almost 15 years. In 2010 a collaboration was formalized and an annual
training was established to educate voluntary observers into “Trusted
Spotters”. The return of this investment is a higher credibility of their
observations after these spotters have undergone a basic meteorological
training and have become aware of their responsibility. The European Severe Storms Laboratory (ESSL) was included to this
collaboration to adopt their successful quality control system of severe
weather reports, which is employed in the European Severe Weather Database
ESWD. That way, reports from Trusted Spotters automatically obtain a higher
quality flag, which enables a faster processing by forecasters on duty for
severe weather warnings, when time is a critical issue. The concept of
combining training for voluntary storm spotters and a thorough quality
management was recognized as a “Best Practice Model” by the European
Meteorological Society. We propose to apply this concept also in other European countries and
present its advancement into an even broader, pan-European approach. The
European Weather Observer app EWOB, recently released by ESSL, provides a
novel and easy-to-handle tool to submit weather and respective impact
observations. We promote its use to provide better data and information for
a further real-time improvement of severe weather warnings.
Groundwater data improve modelling of headwater stream CO2 outgassing with a stable DIC isotope approach
Authors: Marx Anne , Conrad Marcus , Aizinger Vadym , Prechtel Alexander , van Geldern Robert , Barth Johannes A. C.
Published: May 2018

Abstract. A large portion of terrestrially derived carbon outgasses as carbon dioxide
(CO2) from streams and rivers to the atmosphere. Particularly, the
amount of CO2 outgassing from small headwater streams
is highly uncertain. Conservative estimates suggest that they contribute
36 % (i.e. 0.93 petagrams (Pg) C yr−1) of total CO2 outgassing
from all fluvial ecosystems on the globe. In this study, stream pCO2,
dissolved inorganic carbon (DIC), and δ13CDIC data
were used to determine CO2 outgassing from an acidic headwater stream in
the Uhlířská catchment (Czech Republic). This stream drains a
catchment with silicate bedrock. The applied stable isotope model is based on
the principle that the 13C ∕ 12C ratio of its sources and the
intensity of CO2 outgassing control the isotope ratio of DIC in stream
water. It avoids the use of the gas transfer velocity parameter (k), which
is highly variable and mostly difficult to constrain. Model results indicate
that CO2 outgassing contributed more than 80 % to the annual stream
inorganic carbon loss in the Uhlířská catchment. This translated
to a CO2 outgassing rate from the stream of 34.9 kg
C m−2 yr−1 when normalised to the stream surface area. Large
temporal variations with maximum values shortly before spring snowmelt and in
summer emphasise the need for investigations at higher temporal resolution.
We improved the model uncertainty by incorporating groundwater data to better
constrain the isotope compositions of initial DIC. Due to the large global
abundance of acidic, humic-rich headwaters, we underline the importance of
this integral approach for global applications.
Holocene Proxy Climate Series Should Account for the Site's Elevation, the Variable's Sensitivity to Elevation History and Time-lagged Effects: Three Examples
Authors: Fisher David A.
Published: May 2018

Abstract. When making multi-proxy reconstructions over Holocene-long periods, an argument is presented that the elevation of the sites used and/or their elevation history must be taken into account before their proxy records (of temperature or precipitation) are included in the reconstruction. It is shown that to ignore elevation, results in first order errors in the reconstruction, especially in regions under (or close to) the degrading ice sheet. Also it is argued that when assessing the signature of a given putative global event (like the 4.2 ka event), one must allow for there being a complex signature wrt. location, elevation and time lagged variables. Three specific examples are used to illustrate these points.
Arctic lead detection using a waveform mixture algorithm from CryoSat-2 data
Authors: Lee Sanggyun , Kim Hyun-cheol , Im Jungho
Published: May 2018

Abstract. We propose a waveform mixture algorithm to detect leads from CryoSat-2 data, which is novel and different from the existing threshold-based lead detection methods. The waveform mixture algorithm adopts the concept of spectral mixture analysis, which is widely used in the field of hyperspectral image analysis. This lead detection method was evaluated with high-resolution (250 m) MODIS images and showed comparable and promising performance in detecting leads when compared to the previous methods. The robustness of the proposed approach also lies in the fact that it does not require the rescaling of parameters (i.e., stack standard deviation, stack skewness, stack kurtosis, pulse peakiness, and backscatter σ0), as it directly uses L1B waveform data, unlike the existing threshold-based methods. Monthly lead fraction maps were produced by the waveform mixture algorithm, which shows interannual variability of recent sea ice cover during 2011–2016, excluding the summer season (i.e., June to September). We also compared the lead fraction maps to other lead fraction maps generated from previously published data sets, resulting in similar spatiotemporal patterns.