bluuebunny/crossref_metadata_2025 huggingface dataset:
Identifying Anticyclonic Vortex Features Produced by the Rossby Wave Instability in Protoplanetary Disks
Authors: Huang Pinghui , Isella Andrea , Li Hui , Li Shengtai , Ji Jianghui
Published: October 2018

Several nearby protoplanetary disks have been observed to display large-scale crescents in the (sub)millimeter dust continuum emission. One interpretation is that these structures correspond to anticyclonic vortices generated by the Rossby wave instability within the gaseous disk. Such vortices have local gas overdensities and are expected to concentrate dust particles with a Stokes number around unity. This process might catalyze the formation of planetesimals. Whereas recent observations showed that dust crescents are indeed regions where millimeter-size particles have abnormally high concentration relative to the gas and smaller grains, no observations have yet shown that the gas within the crescent region counterrotates with respect to the protoplanetary disk. Here we investigate the detectability of anticyclonic features through measurement of the line-of-sight component of the gas velocity obtained with ALMA. We carry out 2D hydrodynamic simulations and 3D radiative transfer calculations of a protoplanetary disk characterized by a vortex created by the tidal interaction with a massive planet. As a case study, the disk parameters are chosen to mimic the IRS 48 system, which has the most prominent crescent observed to date. We generate synthetic ALMA observations of both the dust continuum and 12CO emission around the frequency of 345 GHz. We find that the anticyclonic features of the vortex are weak but can be detected if both the source and the observational setup are properly chosen. We provide a recipe for maximizing the probability of detecting such vortex features and present an analysis procedure to infer their kinematic properties.
The Rest-frame Optical Sizes of Massive Galaxies with Suppressed Star Formation at z ∼ 4
Authors: Kubo Mariko , Tanaka Masayuki , Yabe Kiyoto , Toft Sune , Stockmann Mikkel , Gómez-Guijarro Carlos
Published: October 2018

We present the rest-frame optical sizes of massive quiescent galaxies (QGs) at z ∼ 4 measured at the K′-band with the Infrared Camera and Spectrograph and adaptive optics (AO) facility, AO188, on the Subaru telescope. Based on a deep multiwavelength catalog in the Subaru XMM-Newton Deep Survey Field, covering a wide wavelength range from the u-band to the IRAC 8.0 μm over 0.7 deg2, we evaluate the photometric redshift to identify massive (M
⋆ ∼ 1011
M
⊙) galaxies with suppressed star formation. These galaxies show a prominent Balmer break feature at z ∼ 4, suggestive of an evolved stellar population. We then conduct follow-up K′-band imaging with AO for the five brightest galaxies (K
AB,total = 22.5 ∼ 23.4). Compared to lower redshift ones, QGs at z ∼ 4 have smaller physical sizes of effective radii r
eff = 0.2–1.7 kpc. The mean size measured by stacking the four brightest objects, a more robust measurement, is r
eff = 0.5 kpc. This is the first measurement of the rest-frame optical sizes of QGs at z ∼ 4. We evaluate the robustness of our size measurements using simulations and find that our size estimates are reasonably accurate with an expected systematic bias of ∼0.2 kpc. If we account for the stellar mass evolution, massive QGs at z ∼ 4 are likely to evolve into the most massive galaxies today. We find their size evolution with cosmic time in the form of

. Their size growth is proportional to the square of stellar mass, indicating that size–stellar mass growth is driven by minor dry mergers.
Distances of Galactic Supernova Remnants Using Red Clump Stars
Authors: Shan S. S. , Zhu H. , Tian W. W. , Zhang M. F. , Zhang H. Y. , Wu D. , Yang A. Y.
Published: October 2018

We carry out a project to independently measure the distances of supernova remnants (SNRs) in the first quadrant of the Galaxy. In this project, red clump (RC) stars are used as standard candles and extinction probes to build the optical extinction (A

V
)–distance(D) relation in each direction of extinction-known SNRs. The distances of 15 SNRs are determined. Among them, the distances of G65.8–0.5, G66.0–0.0, and G67.6+0.9 are given for the first time. We also obtain 32 upper/lower limits of distances, and the distances to G5.7–0.1, G15.1–1.6, G28.8+1.5, and G78.2+2.1 are constrained. Most of the distances measured by the RC method are consistent with previous results. The RC method provides independent access to the distances of SNRs.
A Revised Exoplanet Yield from the Transiting Exoplanet Survey Satellite (TESS)
Authors: Barclay Thomas , Pepper Joshua , Quintana Elisa V.
Published: October 2018

The Transiting Exoplanet Survey Satellite (TESS) has a goal of detecting small planets orbiting stars bright enough for mass determination via ground-based radial velocity observations. Here, we present estimates of how many exoplanets the TESS mission will detect, the physical properties of the detected planets, and the properties of the stars that those planets orbit. This work uses stars drawn from the TESS Input Catalog Candidate Target List and revises yields from prior studies that were based on Galactic models. We modeled the TESS observing strategy to select approximately 200,000 stars at 2-minute cadence, while the remaining stars are observed at 30-minute cadence in full-frame image data. We placed zero or more planets in orbit around each star, with physical properties following measured exoplanet occurrence rates, and used the TESS noise model to predict the derived properties of the detected exoplanets. In the TESS 2-minute cadence mode we estimate that TESS will find 1250 ± 70 exoplanets (90% confidence), including 250 smaller than 2 R
⊕. Furthermore, we predict that an additional 3100 planets will be found in full-frame image data orbiting bright dwarf stars and more than 10,000 around fainter stars. We predict that TESS will find 500 planets orbiting M dwarfs, but the majority of planets will orbit stars larger than the Sun. Our simulated sample of planets contains hundreds of small planets amenable to radial velocity follow-up, potentially more than tripling the number of planets smaller than 4 R
⊕ with mass measurements. This sample of simulated planets is available for use in planning follow-up observations and analyses.
Time Dependence of the IBEX Ribbon and the Globally Distributed Energetic Neutral Atom Flux Using the First 9 Years of Observations
Authors: Schwadron N. A. , Allegrini F. , Bzowski M. , Christian E. R. , Dayeh M. A. , Desai M. I. , Fairchild K. , Frisch P. C. , Funsten H. O. , Fuselier S. A. , Galli A. , Janzen P. , Kubiak M. A. , McComas D. J. , Moebius E. , Reisenfeld D. B. , Sokół J. M. , Swaczyna P. , Szalay J. R. , Wurz P. , Zirnstein E. J.
Published: October 2018

Observations from the Interstellar Boundary Explorer (IBEX) of energetic neutral atoms (ENAs) reveal two populations, those emitted from a narrow (∼20°–40°) ribbon that is centered on the local interstellar magnetic field, and a globally distributed flux (GDF) that is controlled by processes in the heliosheath. This is a third study utilizing a previously developed technique to separate ENA emissions in the ribbon from the GDF. In the first ribbon separation study, we analyzed the first year of IBEX data at the energies of 0.7 keV and above; the second study analyzed data down to 0.2 keV using the first five years of IBEX data. Here, we utilize the separation analysis from 0.7 keV and above to study time evolution in 3 year intervals over the first nine years of IBEX data. This study is the first to reveal the global time evolution of the GDF distinct from that of the IBEX ribbon. We show that the time evolution of the GDF within 40° of the upwind pressure maximum is driven by changes in the solar wind ram pressure through compression and rarefaction in the heliosheath. In contrast, the GDF is relatively stable in the region centered on the heliotail downwind with respect to the interstellar flow. The evolution of the IBEX ribbon is observed to have a time lag with respect to the upwind GDF evolution, likely due to the secondary (neutral) solar wind source. The time lag observed in the ribbon evolution is consistent with the generation of ions retained for several years beyond the heliopause. These observations lend further support to secondary solar wind models of the IBEX ribbon, but also require that there is a significant several year time lag for reneutralization of ions that form the IBEX ribbon. We use this study of the 9 year separation of the IBEX ribbon from the globally distributed flux to prepare for a formal IBEX data release of ribbon and globally distributed flux maps to the heliophysics community.
Method for the monitoring of hydrate formation process in intrafield flowlines
Authors: Emets SV , Kudayarov VN , Prakhova MYu
Published: October 2018

During the production of gas in the Far North and the Arctic, the formation of hydrate and ice plugs in intrafield flowlines is a major concern. The existing methods for determining the onset of hydrate formation are mostly based on the analysis of pressure-and-temperature conditions and therefore they only allow to detect the occurrence of conditions for hydrate formation. They do not allow to localize the specific place where hydrates start to form. The recently developed methods based on echolocation technology have a number of limitations due to the physical nature of the radiation used in them. The proposed method for the monitoring of hydrate formation processes in intrafield flowlines is based on a combination of analysis of pressure-and-temperature conditions in the flowline and the results of flowlines echolocation obtained by means of periodic generation of scanning pressure waves at the end of the flowline (from the side of the switching valve building). The flowlines are divided into characteristic sections bound by characteristic points linked to the structure of the flowline. The propagation speed of the scanning pressure wave is determined in each measuring cycle within the reference section. This can be any section between the characteristic points to which the distance is precisely known and which produce well-defined waveforms and time-stable reflections of scanning pressure waves, for example, the first section located adjacent to the switching valve building. The obtained echograms are compared with the model echogram, which is obtained from a flowline, which is known to be unclogged. Any abnormal change in the signal amplitude is indicative of an onset of the formation of a new local resistance. The proposed recursion formula makes it possible to calculate the temperature in the proximity of this local resistance and, taking into account the pressure value using the diagram of three-phase equilibria for hydrate-forming gases, to diagnose the possibility of existence of crystalline hydrates at a given point. Since pressure-and-temperature conditions for the formation of ice and hydrates are different, the proposed method is selective and enables accurate prediction of the nature of potential buildups.
Conservation priorities for terrestrial mammals in Dobrogea Region, Romania
Authors: Miu Iulia V. , Gabriel B. Chisamera , Popescu Viorel D. , Iosif Ruben , Nita Andreea , Manolache Steluta , Gavril Viorel D. , Cobzaru Ioana , Rozylowicz Laurentiu
Published: October 2018

Based on species occurrence records of museum collections, published literature, and unpublished records shared by mammalian experts, we compiled a distribution database for 59 terrestrial mammals populating the extensively protected Dobrogea Region of Romania. The spatial patterns of mammal distribution and diversity was evaluated and systematic conservation planning applied to identify priority areas for their conservation. The spatial analyses revealed that intensive sampling was not directly correlated to mammal diversity but rather to accessibility for inventory. The spatial prioritisation analysis indicated a relatively aggregated pattern of areas with a high or low conservation value with virtually no connecting corridors between them. The significant overlap between Natura 2000 sites and national protected areas induced an over-optimistic vision of the effectiveness and representativeness of existing Natura 2000 network for species found in Annexes II and IV of the Habitats Directive. These results represent a key step in identifying core areas for the protection of mammal diversity and dispersal corridors for improved connectivity, and to guide future conservation efforts in increasing the effectiveness of the existing protected areas in the context of environmental changes.
Heurs et malheurs des droits de l’Homme
Authors: Ziyadeh Radwan
Published: October 2018

On constate de la part du pouvoir syrien de nombreuses restrictions aux droits de l’Homme et notamment à travers le sort qu’il réserve aux partis d’opposition, aux forums nés lors du Printemps de Damas et à la liberté de la presse.
Le cinéma yougoslave
Authors: Chiclet Christophe
Published: October 2018

Du 22 au 28 août dernier, s’est tenu le 37 e festival du film yougoslave de Nis. Nous sommes bien loin des inaugurations pompeuses de l’époque yougoslave ou des années de plomb de la période Milosevic. Aujourd’hui, le cinéma yougoslave a un nouvel ennemi : le manque criant de moyens.
L’Afrique nouvelle et la France glorieuse
Authors: Harang Charles-Edouard
Published: October 2018

L’émancipation de l’Afrique sub-saharienne a éveillé un vif intérêt chez les jeunes catholiques français et nourri le projet d’une communauté modelée selon les valeurs, les idéaux, les modèles de genre promus dans la BD et la littérature pour la jeunesse. Elle se caractérise aussi par le passage d’une mission de conversion à une mobilisation en faveur du développement. Elle contribue à la modernisation des sociétés et des mouvements de jeunes par la promotion de la mixité et la sécularisation des modèles.
Que faire de l’ambition des siens pour soi ? Réflexions sur le cas de Romain Gary
Authors: Audi Paul
Published: October 2018

Dans La promesse de l’aube , Romain Gary fait état de la naissance de sa vocation d’écrivain en l’abordant en termes d’assignation produite par l’Autre, sa mère en l’occurrence. Très jeune, il aurait entendu d’elle un « Tu seras… » qu’il s’est alors empressé d’interpréter, non sans humour, bien moins comme un commandement que comme une prophétie auto-réalisatrice. Aussi, sous couvert de liberté, évidemment, s’est-il appliqué à devenir ce que le désir de la mère voulait qu’il fût. Ainsi il a fait de ce désir autre la lance de sa propre destinée. Mais comment en a-t-il rendu compte ? Quels enseignements en a-t-il retenus ? Et enfin, et surtout, quelle leçon la psychanalyse pourrait-elle en tirer, c’est-à-dire, et pour ne prendre ici qu’un exemple, à quels ajustements la notion de « névrose de destinée » pourrait-elle se plier au regard d’une telle expérience subjective ?
L’ambition d’une mère à l’œuvre… dans l’écriture et la publication d’un cas de psychanalyse : La petite « Piggle » de Winnicott
Authors: Lenormand Marie
Published: October 2018

Publié il y a 40 ans, en 1977, L a petite «  Piggle  » de Winnicott est un cas de psychanalyse d’enfant assez longtemps éclipsé, voire « black-listé » dans les années 1990 dans le monde anglo-saxon. Un regain d’intérêt, notable depuis ces dernières années, résulte, entre autres, de la décision de Gabrielle, surnommée la « petite Piggle  » dans le cas, une femme aujourd’hui dans la cinquantaine, de faire son «  coming out analytique », i.e. de révéler son identité, d’apporter son témoignage et d’ouvrir certaines archives afférentes au cas auprès de la communauté analytique. L’une des singularités de la conduite de cette cure est de se réclamer de ce que Winnicott dénomme la «  psychoanalysis partagée (shared)  » ( sic ) – consistant à partager, avec les parents, le contenu de la cure mais également partiellement sa conduite, cette démarche allant jusqu’à la coécriture du cas. Nous faisons l’hypothèse que ce dernier, ce faisant, a étonnamment sous-estimé la question de la demande et du transfert parentaux – notamment dans la mesure où ceux-ci peuvent être articulés au symptôme de l’enfant. Des éléments présents dans le cas – et corroborés par Gabrielle adulte – nous conduiront à faire l’hypothèse que ce cas émane, en partie au moins, d’une demande maternelle restée inanalysée. Nous serons ainsi amenés à interroger les incidences et la nature de « l’ambition » d’une mère à l’œuvre dans l’écriture et la publication d’un cas de psychanalyse.
Étienne Balibar et la question du racisme dans Race, nation, classe
Authors: Gaignard Olivier
Published: October 2018

Le présent article cherche à mettre en relief la position philosophique d’Étienne Balibar sur la question du racisme à partir de Race, nation, classe et s’interroge sur l’actualité de ces analyses. Partant du constat de l’expansion du racisme dans le monde contemporain, ce philosophe ne craint pas d’affirmer que le racisme est un universalisme. É. Balibar récuse toute approche essentialiste et tente de saisir le racisme comme une réalité historique multi-dimensionnelle dont les formes s’actualisent à partir de la mémoire des racismes antérieurs. Il spécifie le racisme de notre époque comme un racisme différentialiste qui, naissant après la colonisation, substitue la « culture » aux « races » biologiques et à leur hiérarchisation. La compréhension de l’expansion du racisme dans le monde contemporain passe par l’analyse de l’articulation du racisme au nationalisme et à la lutte des classes. Considérant le racisme comme supplément intérieur et excessif du nationalisme, il soutient que l’agression raciste est une violence autorisée par les institutions de l’État national. Établi sur la différence entre les nationaux et les étrangers, l’État moderne est universaliste en théorie et raciste en pratique. L’articulation du racisme à la lutte des classes s’appuie sur l’idée selon laquelle la race est l’autre nom de la classe. Quand la prolétarisation plonge les individus dans l’indifférenciation sociale, la crise raciste se déclenche. Enfin, si le racisme est un universalisme, c’est précisément parce qu’il construit au sein du genre humain la différence entre l’homme et l’animal, entre le surhumain et le sous-humain.
Seaweed-fed black soldier fly (Hermetia illucens) larvae as feed for salmon aquaculture: assessing the risks of pathogen transfer
Authors: Swinscoe I. , Oliver D.M. , Gilburn A.S. , Lunestad B. , Lock E.-J. , Ørnsrud R. , Quilliam R.S.
Published: October 2018

Sustainable ingredients for animal feed are becoming scarcer. Insects have emerged as a promising protein and lipid ingredient for fish feed, and black soldier fly (BSF;Hermetia illucens) larvae in particular have great potential to efficiently convert organic matter into high value protein and fat. Seaweeds are a sustainable source of organic matter and complex carbohydrates, but can also provide marine long chain polyunsaturated fatty acids for fly larvae, and therefore could offer a commercially attractive alternative to traditional aquafeeds. However, pathogenic bacteria and faecal indicator organisms (FIOs) readily attach to seaweeds, therefore before this novel BSF larvae feed ingredient is advocated, microbiological risk assessments are warranted to ensure animal and public health protection from farm-to-fork. In this study, screening of raw materials and finished products during formulation of experimental insect meal fish feed was undertaken to evaluate the potential for the introduction of selected bacterial pathogens and FIOs via seaweed substrate to BSF larvae, and subsequent survival during multiple manufacturing processing stages. Processed seaweed powder was found to be a microbiologically safe feed substrate for BSF larvae. Low levels of FIOs were associated with larvae at the point of harvest, although larvae meal and extracted lipids were free of FIOs immediately after processing. During handling, distribution and storage the larvae meal and other externally sourced raw feed ingredients for larvae rearing and feed pellet formation became contaminated with FIOs andListeria spp. FIOs were also present, albeit at very low levels, in the finished feed pellets. Processing treatments provided effective decontamination, and FIO and pathogen concentrations in finished products never exceeded microbiological quality standards for insect processed animal proteins. Microbiological contamination of raw materials and finished products during packaging and distribution, or originating from production environments, were identified as critical control points, requiring assessment to ensure good hygiene practices.
The effect of an initial high-quality feeding regime on the survival of Gryllus bimaculatus (black cricket) on bio-waste
Authors: Dobermann D. , Michaelson L. , Field L.M.
Published: October 2018

Previous studies have led to claims that insects can offer a solution to several food security hurdles, one of which is the processing of food waste. However, although it has been demonstrated that some insects survive well on bio-waste (e.g. Hermetia illucens), no study, has to date, demonstrated success rearing species more commonly used for human consumption, such as crickets, on biowaste from hatching. This trial aimed to establish if the black cricket, Gryllus bimaculatus, can be reared successfully on bio-waste from hatching. Since, in other livestock sectors it has been established that nutritional requirements vary with age and that diet must be altered accordingly to achieve the best growth, e.g. chick feed to layer mash in chickens, the present trial used a similar feeding regime of an initially high-quality feed to see if this allowed the subsequent survival of crickets on low quality bio-waste products. Pilot trials have demonstrated poor to no survival on beer waste and cow manure and mid-level survival on unprocessed vegetable waste with chicken feed as the control. Based on this, feed regimes of either 1 or 2 weeks high quality feed (chicken feed) and then either 2 or 3 weeks of low quality feed (beer waste or vegetable waste) were tested. Results showed that even 1 week of high quality feed makes a significant difference in survival and end size of crickets subsequently reared on low-quality bio-waste.
Reference SLE Didactics Framework Proposal for Moroccan Middle School Teachers: Immunology as a Model
Authors: Elmazouni Nourdine Benelhadi , Rihane Abdeslam , Tridane Malika , Belaaouad Said
Published: October 2018

Abstract—Immunology, by the nature of its concept, is of considerable benefit for the translation of the objectives of health education and teaching of sciences of life and earth (SLE) namely, the formation of the scientific mind and the development of a scientific culture for the student.

It is from this angle that a course in immunology has acquired its citizenship right in the Moroccan curriculum of the SLE of the 3rd year of middle school education.

Having experienced a scientific revolution, immunology raises several didactic problems for teachers. Continuing training in SLE didactics applied to immunology could be considered as a tool for the professionalization of the teaching act.

In this article, we have proposed a reference framework for SLE didactics modeled on immunology to be integrated into the continuous training of teachers. This framework includes a body of knowledge on various aspects related to the didactics of immunology. These include the historical-epistemological development of immunology, its status in the curriculum and representations of Moroccan students on the concept of immunity.
Developing Sustainable Relationships Through Organizational Citizenship Behavior
Authors: Tiwari Vivek
Published: October 2018

The article serves the purpose of identifying the behaviors an employee could display resulting in managers' satisfaction and hence strengthening the relationship. To investigate the proposed behaviors in this model, employees' organizational citizenship behavior's (OCB) role as a motivating behavior, was been examined. The sample includes 206 managers/supervisors from different private banks. Using Herzberg's two-factor theory the findings imply that, three types of behaviors, i.e. motivational, indifferent and hygiene can be identified. These findings indicate that of these five established dimensions of OCB, three dimensions (viz. altruism, sportsmanship, and conscientiousness) are motivational in nature; one of the dimensions which is courtesy is under hygiene category; lastly, the fifth one, i.e., civic virtue, is an indifferent type. Overall, it has been found that OCB is a motivational behavior. The results of this study can help employees in understanding what kind of their behaviors causes managers' satisfaction.
Visualization of Feature Engineering Strategies for Predictive Analytics
Authors: Babu Saggurthi Kishor , Vasavi S.
Published: October 2018

Predictive analytics can forecast trends, determines statistical probabilities and to act upon fraud and security threats for big data applications. Predictive analytics as a service (PAaaS) framework based upon ensemble model that uses Gaussian process with varying hyper parameters, Artificial Neural Networks, Auto Regression algorithm and Gaussian process is discussed in the authors' earlier works. Such framework can make in-depth statistical insights of data that helps in decision making process. This article reports the presentation layer of PAaaS for real time visualization and analytical reporting of these statistical insights. Result from various feature engineering strategies for predictive analytics is visualized in specific to type of feature engineering strategy and visualization technique using Tableau.
A Preventive Approach for Consistent OWL 2 DL Ontology Versions
Authors: Jaziri Wassim , Bayoudhi Leila , Sassi Najla
Published: October 2018

Knowledge is continually changing over time. As such, semantic modelling knowledge formalisms, such as ontologies, must follow this evolution and change accordingly. However, ontology changes should never affect consistency. An ontology needs to remain in a consistent state along the whole ontology engineering process. In the literature, most of the approaches check/repair ontology inconsistencies in an a posteriori manner. This costs time and resources. In this article, an inconsistency prevention approach is proposed. It relies on OWL 2 DL change kits, which anticipate inconsistencies upon each change request. The proposed approach predicts potential inconsistencies, provides an a priori repair action, and applies the required changes. Consistency rules are defined and used to check logical inconsistencies, but also syntactical invalidities or style issues. A protégé extension is implemented to validate the proposal.
Philosophy, Past and Present
Authors: Godway Eleanor M.
Published: October 2018

John Macmurray's controversial thesis: “All meaningful knowledge is for the sake of action and all meaningful action for the sake of friendship” is unpacked by explaining and illustrating what he means by the “personal.” He sees philosophy as a cultural phenomenon which expresses and responds to its historical context, and in turn affects how people think and behave. The Subject as Thinker, which has dominated modern philosophy, has led us to value knowledge for its own sake and trust theory over practice, needs to be replaced by the self as agent. The logic of the personal, in which the positive (e.g. action, love) is constituted and sustained by its negative (e.g. thinking, fear) arises out of personal relationship (“I-and-you”). Facing the problematic personhood may enable us to find meaning in relations with others, and face the future with hope.
The Problem of Time's Passage
Authors: Brewer Cameron D.
Published: October 2018

While the B-theory of time seems to fit with the current physical theory, it also seems to require treating temporal passage as an illusion. The aim of this article is to show that by understanding cases of apparent motion in a particular way, one can maintain the B-theory while also retaining the privileged status that the phenomenon of temporal passage plays in human experience. However, to understand these cases correctly, one should turn to arguments in the history of philosophy. More specifically, arguments from Russell, Kant and Hume can be used to make the B-theory more plausible.
Structuration and Learning in a Software Firm
Authors: Gonzalez Rafael A. , Vargas Marisela , Malaver Florentino , Ortiz Efraín
Published: October 2018

This case study presents the evolution of a software firm from startup into early internationalization. Building on a structuration theory, the case is framed within a conceptual model that illustrates the way skills and routines co-evolve both at the level of the founding entrepreneur (agency) and of the firm (structure). As such, this article contributes to an emergent structurational view of technology-based entrepreneurship. Such views places emphasis on learning both at the individual and collective level, in terms of software engineering, commercial, managerial and strategic capabilities. In addition, it supports a dynamic perspective of entrepreneurship in the software industry by covering not only the startup phase but also early growth and consolidation of the firm.
Chemical-bromatological composition and in vitro ruminal kinetics of sugar cane silage with maniçoba
Authors: Carvalho Francisco Allan Leandro de , Resende Percivaldo Xavier , Benicio Clístenes Amorim , Siqueira Jackson De Oliveira , Menezes Daniel Ribeiro , Queiroz Mário Adriano Ávila
Published: October 2018

The objective this study was to evaluate the effect of maniçoba supplementation in sugar cane silage with respect to chemical-bromatological composition and the in vitro degradation kinetics of the silage. This experiment was conducted in a completely randomized design with four treatments (maniçoba levels: 0, 20, 30, and 40%) and six repetitions. Silage samples were analyzed for their chemical-bromatological composition, digestible energy, metabolizable energy, total digestible nutrients, in vitro gas production and degradability parameters. The silage with higher inclusion level had better bromatological composition (p < 0.05) than the silage without maniçoba for CP, NDF, ADF and MM (6.49, 56.64, 38.66 and 4.52% versus 2.21, 70.96, 49.95 and 2.78%). Higher ME content (2.35 MJ kg-1 MS versus 1.85 MJ kg-1 MS), DE (2.87 Mcal kg-1 MS versus 2.25 Mcal kg-1 MS) and TDN (65.16% versus 51.11%), respectively. The highest values for gas production were also observed in silage with added maniçoba due to higher NFC content (34.87%). With an increase in the proportion of maniçoba, there was an increase in the soluble a fraction, b fraction, and thus a higher effective degradability of dry matter (46.56%). The addition of maniçoba improves the nutritive value of sugarcane silage.
Cursos de graduação no Sinaes: a prática institucional entre parâmetros nacionais e internacionais de avaliação e acreditação da qualidade
Authors: Rothen José Carlos , Bernardes Joelma Dos Santos , Borges Regilson Maciel , Griboski Claudia Maffini
Published: October 2018

O artigo objetiva compreender os parâmetros oficiais de qualidade presentes na avaliação dos cursos de graduação. Apresenta abordagem teórica da avaliação, discussão dos parâmetros nacionais e internacionais de avaliação e acreditação da qualidade, análise de documentos oficiais e um estudo de caso em cursos nas áreas de Administração, Enfermagem, Engenharia e Pedagogia, realizando análise de documentos institucionais, resultado das avaliações e entrevistas. Conclui-se, a partir da análise documental, que o Sinaes estabeleceu padrões de qualidade variáveis: a) concepção pedagógico/formativa presente na autoavaliação institucional; b) cumprimento de requisitos legais dispostos no instrumento de avaliação de cursos de graduação; e c) desempenho dos estudantes, como base para o cálculo dos indicadores para cursos e IES. Os estudos de caso resultaram em dois grupos. No primeiro, se observa a presença, na prática institucional, de elementos que os instrumentos de avaliação in loco valorizam: participação da comunidade acadêmica, coerência do projeto pedagógico com o institucional, articulação entre graduação e pós-graduação, perfil socioeconômico do egresso e articulação entre formação profissional e a sociedade. No segundo, a IES demonstra seguir a lógica reguladora, tomando o Enade e os outros instrumentos de avaliação como referência da qualidade de cursos e adequando a eles o seu projeto institucional.
A randomized study comparing endoscopic third ventriculostomy versus ventriculoperitoneal shunt in the management of hydrocephalus due to tuberculous meningitis
Authors: Aranha Andrew , Choudhary Ajay , Bhaskar S , Gupta L
Published: October 2018

Objectives: The objective of this study was to compare safety and efficacy of endoscopic third ventriculostomy (ETV) versus ventriculoperitoneal (VP) shunt in the treatment of hydrocephalus in tuberculous meningitis (TBM) and to assess clinical and radiological profiles of patients with TBM that would be better suited to either VP shunt or ETV. Methods: This study was a single-center randomized prospective study on 52 patients with TBM hydrocephalus in the pediatric age group (<18 years of age). Patients included in the study were randomized into undergo either VP shunt or ETV. Both groups were followed up for a minimum of 5 months and assessed for success and failure rates as well as procedural complications and neurologic sequelae. Results: Twenty-six patients underwent ETV with a success rate of 65.4% with six of nine failures occurring within the first 16 days after surgery (median time to failure – 3 days). In the VP shunt group, there was a success rate of 61.54% and a median time to failure of 50 days. Modified Vellore grading was found to be a significant factor in determining outcome in both ETV and VP shunt groups with high-grade TBM consistently associated with poor outcome (odds ratio = 4.2). Conclusions: ETV can be performed effectively in young children including infants, as well as those with communicating hydrocephalus, high cerebrospinal fluid (CSF) cell counts, and protein levels with a lower rate of failure than that of VP shunt. Hence, ETV should be attempted as the first-choice CSF diversion procedure in hydrocephalus secondary to TBM where technical expertise and experience with this procedure is available as it avoids the myriad of lifelong complications associated with shunts.
A giant tumefactive perivascular space: A rare cause of obstructive hydrocephalus and monoparesis
Authors: Woo Peter , Cheung Eric , Zhuang James , Wong Hoi-Tung , Chan Kwong-Yau
Published: October 2018

Cerebral perivascular spaces (PVSs), otherwise known as Virchow-Robin spaces, are interstitial fluid-filled channels, <2 mm in diameter that form around arterial perforators as they course from the cortex into the brain parenchyma. In contrast, a giant tumefactive PVS is a rare entity comprising of clusters of such channels larger than 15mm resembling a neoplastic process as the name suggests. We report a 55-year-old male who presented with unsteady gait, cognitive decline, and left lower limb weakness for 6 months. Magnetic resonance imaging revealed a noncontrast enhancing multicystic intraaxial lesion of the right mesencephalon-diencephalon junction extending into the anterior third ventricle causing obstructive hydrocephalus. A ventriculoperitoneal shunt was inserted with a complete reversal of his neurological symptoms. Such PVSs can easily be misidentified for a cystic tumor, and their unique radiological features are discussed to prevent unnecessary surgery. We also demonstrate that when they cause hydrocephalus and midbrain compression symptoms cerebrospinal fluid shunting alone can result in excellent outcomes.
Intramedullary spinal cord lipoma mimicking a late subacute hematoma
Authors: Pasalic Ivan , Brgic Klara , Nemir Jakob , Kolenc Danijela , Njiric Niko , Mrak Goran
Published: October 2018

Spinal cord lipomas are rare and benign tumors which may cause progressive neurological deficits due to their local expansion. We present the case of a 59-year-old male patient with severe lumbosacral pain and slowly progressive paresis of the right leg, misdiagnosed with degenerative spine disease. Repeated magnetic resonance (MR) T1-weighted images of the thoracic spine suggested a subacute intramedullary hematoma. Due to progression of the neurological deficit, the patient was referred to a neurosurgeon, who indicated surgical evacuation of the hematoma. The intraoperative finding revealed an intramedullary spinal cord lipoma, which was later confirmed by histological analysis. Since subacute intramedullary hematomas and intramedullary spinal cord lipomas present with similar clinical and radiological features, diffusion-weighted MR imaging should be used to distinguish these entities.
Retrobulbar lymphangioma: A rare case report
Authors: Kumar Anil , Nehete Lokesh , Chaturvedi Jitender , Hussain Nighat
Published: October 2018

We report a case of biopsy-proven retrobulbar lymphangioma in a 14-year-old girl. She presented with chief complaints of swelling in the left eye for 2 months. The patient underwent imaging evaluation and it was diagnosed as cavernous hemangioma, radiologically. However, later on, the patient underwent surgery, and the specimen was sent for histopathology which revealed it to be a lymphangioma.
Secondary arachnoid cyst – A late complication of craniotomy: A case report and review of literature
Authors: Osman Mostafa , Diraz Ahmed
Published: October 2018

Arachnoid cyst can be defined as cerebral-spinal fluid entrapment within the central nervous system. It may occur primarily as a congenital malformation or secondary as a complication following trauma, infection, bleeding, or surgical manipulation. Congenital arachnoid cyst usually asymptomatic and cause no pressure symptoms. No treatment is needed unless size increase and cause pressure symptoms and increased intracranial pressure. We report a case presented to the hospital with neurological signs of increased intracranial pressure, 3 years Post aborted craniotomy for meningioma resection. Radiological imaging showed postoperative newly developed arachnoid cyst with mass effect. He underwent the urgent cerebral spinal fluid diversionary procedure with cystoperitoneal shunt.
Normality along squares
Authors: Drmota Michael , Mauduit Christian , Rivat Joël
Published: October 2018

The goal of this work is to show a first example of an almost periodic zero entropy sequence (in the sense of symbolic dynamical systems) whose subsequence along squares is a normal sequence. As an application, this provides a new method to produce normal numbers in a given base.
Oscillating heat kernels on ultrametric spaces
Authors: Bendikov Alexander , Cygan Wojciech , Woess Wolfgang
Published: October 2018

Let

(X,d)

be a proper ultrametric space. Given a measure

m

on

X

and a function

B \mapsto C(B)

defined on the collection of all non-singleton balls

B

of

X

, we consider the associated hierarchical Laplacian

L=L_{C}{}

. The operator

L

acts in

\mathcal{L}^{2}(X,m),

is essentially self-adjoint and has a pure point spectrum. It admits a continuous heat kernel

\mathfrak{p}(t,x,y)

with respect to

m

. We consider the case when

X

has a transitive group of isometries under which the operator

L

is invariant and study the asymptotic behaviour of the function

t\mapsto \mathfrak{p}(t,x,x)=\mathfrak{p}(t)

. It is completely monotone, but does not vary regularly. When

X=\mathbb{Q}_{p}{}

, the ring of

p

-adic numbers, and

L=\mathcal{D}^{\alpha}

, the operator of fractional derivative of order

\alpha

, we show that

\mathfrak{p}(t)=t^{-1/\alpha}\mathcal{A} (\log_{p}t)

, where

\mathcal{A}(\tau)

is a continuous non-constant

\alpha

-periodic function. We also study asymptotic behaviour of min

\mathcal{A}

and max

\mathcal{A}

as the space parameter

p

tends to

\infty

. When

X=S_{\infty}{}

, the infinite symmetric group, and

L

is a hierarchical Laplacian with metric structure analogous to

\mathcal{D}^{\alpha},

we show that, contrary to the previous case, the completely monotone function

\mathfrak{p}(t)

oscillates between two functions

\psi(t)

and

\Psi(t)

such that

\psi(t)/\Psi(t)\to 0

as

t \to \infty

.
Case Report: Acute Hepatitis E in a Pediatric Traveler Presenting with Features of Autoimmune Hepatitis: A Diagnostic and Therapeutic Challenge
Authors: Minkoff Nathan Z. , Buzzi Kate , Williamson Alex K. , Hagmann Stefan H. F.
Published: October 2018

Hepatitis E virus (HEV) is globally the most common cause of acute viral hepatitis. In industrialized countries, HEV infection can be seen in travelers returning from hyperendemic countries or in individuals at risk for autochthonous infection due to zoonotic exposure. Hepatitis E virus infection is often unrecognized and at times misdiagnosed because of nonspecific findings that can overlap with other causes of hepatitis, including autoimmune hepatitis (AIH). Although most cases of acute HEV infection resolve spontaneously and do not require treatment, life-threatening acute liver failure may occur in some cases. We discuss the case of an 8-year-old boy returning from Bangladesh with progressive acute liver injury and a clinical profile suggestive of AIH, who showed a favorable response to corticosteroid treatment before the diagnosis of an acute HEV infection could be established.
Comparison of the Impact of Different Mass Drug Administration Strategies on Infection with Schistosoma mansoni in Mwanza Region, Tanzania—A Cluster-Randomized Controlled Trial
Authors: Olsen Annette , Kinung’hi Safari , Magnussen Pascal
Published: October 2018

Annual school-based mass drug administration with praziquantel has been widely implemented to control schistosomiasis, but other treatment strategies could have a different impact. The aim of this study was to investigate the impact of six different treatment strategies on Schistosoma mansoni infection in a cluster-randomized controlled trial in schoolchildren, in a high transmission area of the Mwanza Region, Tanzania. A total of 150 villages were randomized into six arms with 25 villages in each arm. In each village, approximately 100 schoolchildren aged 9–12 years were randomly selected each year and investigated for S. mansoni prevalence and intensity based on three consecutive stool samples using the duplicate Kato–Katz technique. Four years of community-wide treatment (CWT) was the most intensive treatment strategy, whereas 2 years of school-based treatment (SBT) combined with 2 years without treatment (holiday) was the least intensive treatment. The remaining strategies constituted different combinations of CWT, SBT, and holiday years. Baseline results on S. mansoni infection were obtained from 14,620 schoolchildren from 148 villages, and mean prevalence and mean intensity among infected were 48.6–60.6% and 130.5–229.8 eggs per gram, respectively. Over the years, mean prevalence and mean intensities declined in all arms, but when comparing year 5 mean prevalence and mean intensity, there were no statistically significant differences between treatment arms. Thus, measured in a random selection of schoolchildren aged 9–12 years, four times CWT was not superior to four times SBT, while 2 years of treatment holiday combined with 2 years of SBT had the same impact as 4 years of SBT.
Cognitive Contributors to Multiple Errands Test (MET) Performance
Authors: Hansen Melissa , De Amicis Nicole K. , Anderson Nicole D. , Binns Malcolm A. , Clark Amanda J. , Dawson Deirdre R.
Published: October 2018

OBJECTIVE. The Multiple Errands Test (MET) was designed to measure the effect of executive dysfunction on everyday life activities, but little is known about the cognitive requirements for successful performance. This study’s objective was to investigate cognitive functions associated with successful MET performance, specifically, the Baycrest-MET.

METHOD. Correlation analysis examined relationships between Baycrest-MET performance and neuropsychological functioning in participants with acquired brain injury (ABI; N = 27).

RESULTS. The association of tasks omitted with executive function (EF) accounted for 15.2%–42.3% of the variance; the association of tasks omitted with attention and processing speed, for 16.8%–24.0%; and the association of tasks omitted and total rule breaks with visuospatial memory, for 18.5%–31.4%.

CONCLUSION. Poor performance on the Baycrest-MET in people with ABI is associated with impairments of EF, attention, memory, and processing speed. Different patterns of performance may arise from different constellations of impairments.
A Measure of Self-Regulated Learning in Online Agriculture Courses
Authors: Chumbley Steven “Boot” , Haynes J. Chris , Hainline Mark S. , Sorensen Tyson
Published: October 2018

For students to be successful in the online learning environment, change from passive learners to active learners is essential. Students who successfully regulate and change their learning know where and how to acquire the knowledge necessary for success in the online environment. Introducing students early through dual enrollment programs can ensure students have the necessary skills for success. This project sought to determine the self-regulated learning level of students in an online agriculture course. Students were found to have the highest self-regulation within environmental structuring and goal setting. The lowest online learning self-regulation was in the area of task strategies. Females had a higher level of self-regulated online learning while there was found to be little difference by ethnicity. Low correlations were found between student experience with online courses and their perceived online self-regulated learning level. Students in an online agriculture dual enrolment course are encouraged to develop goals and at the conclusion complete a self-evaluation of their learning. Research should continue to help researchers understand and properly identify any personal, behavioral or environmental factors that influence secondary students’ self-regulated learning in an online agriculture dual enrollment course.
Reflective Journeys of Five Women Agriculturists in Australia: A Qualitative Study
Authors: Stephens Carrie A. , Brawner Shelby , Dean Amanda , Stripling Christopher T. , Sanok Danielle
Published: October 2018

Women comprise the minority in production agriculture leadership, and their leadership roles in agricultural industries are rarely explored. The purpose of this study was to explore the reflective journeys of five Australian women in production agriculture. The central research questions asked were “What lived experiences helped you obtain your leadership position and what leadership characteristics do you identify as essential in your success?” This study used a phenomenological approach, as reflecting upon the subjects’ past cultural experiences was crucial in understanding their current positions in life and leadership. Five women in agriculture from Australia served as the participants for this study, and they were selected based upon their leadership presence in Australia. Specific themes were generated which included (a) childhood experiences, (b) current family dynamics, (c) hardship, and (d) perception of leadership style. The perception of leadership style is further divided into three sub-themes: (a) self-perception of leadership, (b) leading by example, and (c) outreach efforts for women in the industry. The five women whose personal journeys were explored are primarily concerned with improving the knowledge given to them and presenting new opportunities to other women when they can. Some recommendations for future research are “What are the reflective journey stories of women agriculturists in the United States?”, “What are reflective journey stories of men engaged in agriculture industries?” and “What mentoring strategies are being utilized to recruit and retain women in agriculture industry fields?”