bluuebunny/crossref_metadata_2025 huggingface dataset:
A notion analogous to the discriminant for transcendental elements in certain extensions of local fields
Authors: Achimescu S. , Alexandru V. , Andronescu C.S.
Published: May 2020

Let

(K, |\cdot|)

be a local field. In this paper we define an invariant analogous to the discriminant over

K

for certain transcendental elements over

K

.
Closed ideals in the uniform topology on the ring of real-valued continuous functions on a frame
Authors: Abedi Mostafa , Estaji Ali Akbar
Published: May 2020

For a completely regular frame

L

, the ring

\mathcal RL

of real-valued continuous functions on

L

is equipped with the uniform topology. The closed ideals of

\mathcal RL

in this topology are studied, and a new, merely algebraic characterization of these ideals is given. This result is used to describe the real ideals of

\mathcal RL

, and to characterize pseudocompact frames and Lindelöf frames. It is shown that a frame

L

is finite if and only if every ideal of

\mathcal RL

is closed. Finally, we prove that every closed ideal in

\mathcal RL

is an intersection of maximal ideals.
On $\alpha$-minimizing hypercones
Authors: Lewintan Peter
Published: May 2020

In this paper we considerably extend the class of known

\alpha

-minimizing hypercones using sub-calibration methods. Indeed, the improvement of previous results follows from a careful analysis of special cubic and quartic polynomials.
A monodromy criterion for the good reduction of $K3$ surfaces
Authors: Hernandez-Mada Genaro
Published: May 2020

We give a criterion for the good reduction of semistable

K3

surfaces over

p

-adic fields. We use neither

p

-adic Hodge theory nor transcendental methods as in the analogous proofs of criteria for good reduction of curves or

K3

surfaces. We achieve our goal by realizing the special fiber

X_s

of a semistable model

X

of a

K3

surface over the

p

-adic field

K

, as a special fiber of a log-family in characteristic

p

and use an arithmetic version of the Clemens–Schmid exact sequence in order to obtain a Kulikov–Persson–Pinkham classification theorem in characteristic

p

.
О спектре и плотности состояний оператора почти-Матье
с частотой, изображаемой цепной дробью с большими элементами
Authors: Fedotov Aleksandr Aleksandrovich , Shchetka Ekaterina Vladimirovna
Published: May 2020

Обсуждается оператор почти-Матье с частотой, изображаемой
бесконечной цепной дробью с достаточно большими элементами. При этом
спектр оператора является канторовым множеством и может быть описан
за счет последовательного "удаления" конечных наборов все более и
более мелких лакун. Интервалы, между лакунами, найденными на очередном
шаге, называются зонами. Описаны асимптотики центров и длин большинства
зон, в примыкающих к ним лакунах вычислены значения интегрированной
плотности состояний, описаны асимптотические свойства распределения
ее значений по лакунам. Результаты получены с помощью
квазиклассических методов.
О каноническом базисе пары согласованных скобок Пуассона на алгебре матриц
Authors: Garazha Aleksandra Andreevna
Published: May 2020

Для произвольной комплексной матрицы $A$ и общей матрицы $X$ найден канонический базис кронекеровой части билагранжева подпространства относительно соответствующих скобок Пуассона на алгебре Ли $\mathfrak{gl}_n(\mathbb C)$, а также соответствующая этому базису система функций в биинволюции. В частности, для нильпотентных матриц $A$ доказано, что все ненулевые функции, полученные методом сдвига аргумента Мищенко-Фоменко, примененного к коэффициентам характеристического многочлена, составляют кронекерову часть полной системы функций в биинволюции.
Библиография: 9 названий.
Функции с универсальными рядами Фурье-Уолша
Authors: Grigoryan Martin Gevorgovich
Published: May 2020

В работе доказаны некоторые теоремы, связанные с существованием и описанием структуры функций, ряды Фурье которых по системе Уолша универсальны в том или ином смысле в функциональных классах $L^{p}[0,1]$, $0<p<1$, и $M[0,1]$.
Библиография: 30 названий.
Attitudes of University Students towards STEM Approach
Authors: Altakahyneh Bahjat Hamid , Abumusa Mofeed
Published: May 2020

The study aimed at investigating the attitudes of university students towards science, technology, engineering, mathematics (STEM) approach. The participants of the study consist of (60) students who were studying in bachelor and master degree, they trained in the center of training at the university, the participants acquiring the skills of STEM approach by using the WeDo2.0 application, they received knowledge and skills of STEM approach. The tool of the study was questionnaire which was validity and reliability verified. Results of the study showed that positive student attitudes toward using STEM approach Reached 86.4%. Each of the following scores is ranked as descending order: desire to apply strategy (87.4 %%), collaboration and communication (86.4%), thinking and problem solving (86%), motivation and problem solving (86%). There was no statistical significance difference between the variable type degree of study (master/bachelor) as well as the nature of employment in terms of whether the learner was either an employee or non-employee. In light of results of the study, researchers recommend using STEM approach in teaching courses in open learning systems.
Research Attitudes, Motivations, and Challenges of STEM Education Researchers
Authors: Landicho Christoper Jan Bacurin
Published: May 2020

The value of Science, Technology, Engineering, and Mathematics (STEM) education and the significance of conducting research motivated the conduct of this study. As teachers take on a more active role in knowledge generation, studying their research attitudes, motivations, and challenges has become more relevant and timely. This paper aimed to describe Filipino STEM education researchers based on the three aforementioned parameters. To achieve this goal, a total of 46 STEM teacher-researchers were purposively sampled to answer an online survey. Three of the responses, however, were excluded due to incomplete answers. Results revealed that the respondents held a positive outlook towards research and consider it as an avenue for professional growth. They also recognized the positive impacts of research on their teaching skills and in their students’ learning experiences. Both extrinsic and intrinsic motivations were reported to be the main stimuli in doing research. Time and financial constraints, heavy workload, and lack of exposure and experience in research were some of the challenges identified by the respondents. Suggestions for future research and policy directions were provided.
Critical Thinking Skills in Asynchronous Discussion Forums: A Case Study
Authors: Al-Husban Naima Ahmad
Published: May 2020

This study investigated critical thinking indicators of students’ postings on the asynchronous online discussion forums on the learning management system (LMS) at Arab Open University (AOU), Jordan. The models used to diagnose nineteen students’ postings were Garrisons’ (2001) thinking skills and Newman (1995). Results revealed that participants’ postings reflected the critical thinking indicators proposed by Newman like relevance and importance, but students need to enhance skills like justification, and critical assessment. According to Garrisons’ model, participants could identify, and explore problems, but they need support to evaluate the problem and integrate solutions into their existing knowledge. The findings reveal that participants acquire essential critical thinking skills, but they need to focus on higher order skills. Further research should be conducted using different courses issues to impart the critical thinking indicators that students need in higher institutions. In addition, instructors should be trained on how to formulate online tasks that stimulate high level of thinking.
LIBERACIÓN DE LOS PATRONES DE CÍTRICAS 'SWINGLE CITRUMELO', 'CARRIZO' Y HRS 812 PARA PUERTO RICO
Authors: Félix Román-Pérez  , Agenol González-Vélez
Published: May 2020

LIBERACIÓN DE LOS PATRONES DE CÍTRICAS 'SWINGLE CITRUMELO', 'CARRIZO' Y HRS 812 PARA PUERTO RICO
Evaluación del rendimiento y la calidad del forraje Maralfalfa en tres vaquerías del norte de Puerto Rico en la época de días largos
Authors: Rafael Ramos-Santana  , Yamil Quijano-Cabrera  , Raúl Macchiavelli
Published: May 2020

Se realizó un experimento para evaluar el rendimiento de materia seca (RMS) y la calidad del forraje de Maralfalfa a seis intervalos de cosecha (IC; 40, 50, 60, 70, 80, 90 d) en tres vaquerías del norte de Puerto Rico durante la época de días largos. El IC de 40 días resultó en significativamente (P < 0.05) menor RMS que los intervalos de 60, 80 y 90 días; no hubo diferencias significativas (P < 0.05) entre los RMS obtenidos a 40, 50 y 70 días. El corte a los 40 días resultó en la mejor calidad forrajera según indicado por los criterios de contenido de proteína bruta, digestibilidad in vitro de la materia seca, y de fibra insoluble en detergente neutro; además de valores estimados de energía neta, índice de calidad relativa y la producción teórica de leche. Aunque se observan diferencias significativas (P < 0.05) en algunos de estos criterios entre los IC de 40 y 50 días, el de 50 días todavía evidencia una buena calidad nutricional; contrario a los cuatro intervalos más largos, con los que se obtuvo mayor RMS pero la calidad forrajera resultó marcadamente inferior. Las ecuaciones de regresión simple entre la digestibilidad in vitro de la materia seca y de la fibra insoluble en detergente neutro versus el intervalo de corte mostraron una pérdida en digestibilidad de 2.7 y 3 puntos porcentuales por cada 10 días de aumento en el intervalo de corte, respectivamente.
5. Comunicación oral efectiva y creatividad en la formación de técnicos agroindustriales
Authors: De León Geisel , Márquez Zaida , Rojas Hilda
Published: May 2020

La presente investigación-acción procuró propiciar transformaciones en el aprendizaje de la comunicación oral efectiva para mejorar el desempeño de los estudiantes de la asignatura Lenguaje y Comunicación en el Programa Tecnología Agroindustrial de la Universidad Centroccidental “Lisandro Alvarado”. Los actores sociales fueron cincuenta y seis estudiantes, (el total de inscritos) del lapso 2012-1. La observación participante, los grupos de discusión y el testimonio focalizado fueron las técnicas para recolectar información. El instrumento utilizado fue el diario de registro. Se constató la necesidad de planificar y ejecutar el plan de acción “Comunicación Oral Efectiva y Despliegues de Creatividad”, que se llevó a cabo en dos fases. Los hallazgos evidenciaron que el desarrollo de habilidades de comunicación oral generó aportes agroecológicos que favorecieron la conciencia ambiental. Finalmente, los actores se reconocen como personas creativas-reflexivas, que manifiestan deseos de transformación comunicativa para impactar su entorno social con propuestas novedosas.
7. Evaluación de los aprendizajes y hermenéutica
Authors: Mella Farías Luciano
Published: May 2020

Este ensayo, fruto de la reflexión teórica y la experiencia docente, tiene como propósito aportar algunas ideas sobre la posibilidad de hacer de la hermenéutica el referente epistemológico  de los procesos de evaluación de los aprendizajes. En el desarrollo del trabajo, dividido en tres puntos principales, se comienza con las razones por las cuales la hermenéutica se constituye en el enfoque más idóneo  para la evaluación con énfasis en la experiencia humana; en seguida, dadas las características de este trabajo, se presentan las contribuciones y perspectivas de los autores más relevantes en escueto y conciso resumen, aplicables a la acción evaluativa; y por último, se señalan elementos conceptuales y procedimentales que permiten hacer operativa la propuesta. Para concluir, de manera tentativa, se hace breve reseña de los componentes de la evaluación de los aprendizajes desde la perspectiva hermenéutica.
3. Escuela y familia: alianza estratégica para la prevención del maltrato infantil
Authors: Silva Verde Alejandra , Tabernero Urbieta Carmen
Published: May 2020

El maltrato infantil como problemática multidimensional y multidisciplinaria, comprende diferentes ámbitos: legal, social, educativo, salud entre otros, los cuales deberían contribuir de manera conjunta y vinculada al desarrollo de acciones significativas para su prevención. Esta investigación tuvo como propósito diseñar estrategias de prevención del maltrato infantil a través de una alianza eficaz entre la escuela y la familia. El trabajo campo, de tipo descriptivo, obtuvo información de la problemática estudiada en el Centro de Educación Inicial (CEI) “Juan Griego”, ubicado en el municipio Marcano del Estado Nueva Esparta, diagnosticando sus causas mediante el registro y análisis de datos disponibles. Así 68 padres y madres y 20 docentes tomaron parte de la investigación. Como resultado del estudio se evidenció la carente capacitación del docente respecto al maltrato infantil, hecho realmente alarmante, dado que si no se posee conocimiento sobre esta problemática social, no se puede diagnosticar, tratar y mucho menos prevenir.
7. La educación universitaria para las personas de la tercera edad en Venezuela: una modalidad educativa necesaria
Authors: Silva Velásquez Irangelys Emilia
Published: May 2020

El presente ensayo pretende abordar las oportunidades, circunstancias y prejuicios que enfrentan las personas de la tercera edad en la etapa enseñanza-aprendizaje a nivel universitario. A través de la historia educativa en Venezuela y debido a su condición física el adulto de la tercera edad ha sobrellevado dificultades para estudiar en las Universidades del país realizando esfuerzos y sacrificios para mantenerse al ritmo de los estudiantes jóvenes con el firme propósito de formarse profesionalmente. Se abordó la temática mediante el análisis de referencias teóricas, datos experimentales de otros autores y experiencias de otros países en la incorporación de personas de la tercera edad en la educación universitaria. Para concluir se presenta  como propuesta la formación académica por medio de estrategias que fomenten la comunicación, uso de su experiencia y dinámicas de grupos con ambientes de aprendizaje gratos y acordes a su edad.
Identifikasi Cacing Gastrointestinal pada Babi di Kabupaten Jayawijaya dan Paniai, Provinsi Papua
Authors: Widayati Isti , Rahayu Bernadetta WI , Degei Noak
Published: May 2020

The rearing of pigs in the mountains of Papua is generally based on the free-range method during the daylight. Poor environmental sanitation and free-range management have been reported as risk factors of gastrointestinal worm infestation in pigs. In general, gastrointestinal parasite infestation can cause a loss of appetite, impede growth, decrease feed conversion rate, and increase vulnerabilities toward other pathogens. To add to that, the acute levels of infestation can cause death. Furthermore, some species can infest humans (zoonotic). As zoonotic parasites can impact the productivity and health of the people, it is crucial to identify the species of such parasites. This research was conducted in Umpakalo village at Kurulu district, Jayawijaya region, and three other villages namely Obaipugaida, Eyagitaida, and Ugituwataida at Ekadide district, Paniai region. Forty-five fecal samples from different pigs were used as the research material. The native method was used to identify the physical appearance of the eggs, and in turn, identify the species of the parasite. The data was analyzed in the tabulation form. The conclusion obtained in this research is that 95% of the fecal samples were infected by the gastrointestinal worms. Identified worms are Ascaris suum, Strongyloides ransomii, Trichuris suis, and Strongyle types. Most pigs have mixed infections.
Sifat fisik, Organoleptic dan Aktivitas Antioksidan Sosis Ayam dengan Penambahan Ekstrak Daun Sirsak (Annona muricata l.)
Authors: Ismanto Arif , Subaihah Sitiani
Published: May 2020

This study aims to determine the effect of adding soursop leaf extract (SLE) at level 0 (control), 2, 4, and 6% (the weight of SLE /the weight of the dough) on the physical, organoleptic and antioxidant qualities of chicken sausages. A Completely Randomized Design (CRD) was used in this study. Data analysis was performed using analysis of variance (ANOVA) and further tested using the Least Significant Difference Test (LSD). The results showed that differences in SLE levels did not significantly affect the physical quality of chicken sausages, but did change the color, aroma, texture, and taste. The color, smell, texture, and taste of chicken sausage with the addition of 6% SLE showed results that appeared to be greener, had a stronger soursop aroma, more elastic, and tasted more bitter than the other treatments (P <0.05). The lowest antioxidant activity was shown by SLE 0% in both the dough (39.78%) and cooked sausage (17.10%). The highest antioxidant activity was SLE 6%, with antioxidant activity of 57.63% in the dough and 37.43% in cooked sausages. The addition of chicken sausage does not affect physical quality but has a significant impact on the soursop leaf extract test on organoleptic color, aroma, texture, and taste. The best organoleptic quality is demonstrated at 4% SLE. The addition of soursop leaf extract level is accompanied by increased levels of antioxidants both in the dough and in cooked sausage.
Pertumbuhan Vegetatif Rumput Raja (Pennisetum purpureophoides) dengan Perlakuan Pupuk Anorganik Dan Organik
Authors: Aritonang Sonria , Rumetor Sientje Daisy , Yoku Onesimus
Published: May 2020

This study aims to determine the effect of inorganic fertilizer, organic fertilizer, and the combination of both on the growth of king grass (Pennisetum purpurephoides). The research method was a completely random design with 4 treatments and 5 replications. The research treatments consisted of A (without fertilizer), B (100% inorganic fertilizer), C (100% organic fertilizer), and D (50% inorganic and 50% organic fertilizer). The result of the study shows that inorganic, organic, and its fertilizer combination treatment has a non-significant effect on the height of the plant, the length and width of the leaf, and the length of its segments, while inorganic and organic fertilizer treatment has a significant effect on the stem diameter. The conclusion is that the use of 100 % organic fertilizer has better results for the vegetative growth of king grass (Pennisetum purpurephoides) compared to the use of inorganic fertilizer and its combination.
Construyendo compuertas cuánticas con IBM’s cloud quantum computer
Authors: Caicedo Ortiz H. E. , Santiago Cortés E. , Mantilla Sandoval D. A.
Published: May 2020

En este artículo, se describe de manera didáctica los elementos esenciales que permiten realizar cálculos elementales en un computador cuantico. Revisamos las características de las compuertas cuánticas más relevantes de 1-qubit y 2-qubits, ademas de implementarlas en el computador cuántico de IBM.
Presença do ossículo meniscal na articulação femorotibial de gatos-domésticos (Felis catus, Linnaeus, 1758)
Authors: Prieto Wiliam Da Silva , Carvalho Ana Carolina Fornari Borges de , Silva Luana Célia Stunitz da
Published: May 2020

A articulação femorotibial é uma articulação complexa do tipo sinovial, que, além da relação com a patela, em algumas espécies de animais pode apresentar uma estrutura radiopaca visualizada ao exame radiográfico de formato oval entre os ossos do fêmur e tíbia, em projeção mediolateral, denominado ossículo meniscal. Embora comumente relatado em diferentes espécies, inclusive no homem, pouco se sabe sobre a sua função e frequência, sendo bem constatada sua existência em espécimes de grandes felídeos. O presente estudo teve como objetivo realizar a análise radiográfica da articulação femorotibiopatelar de 40 gatos-domésticos (Felis catus, Linnaeus, 1758) em projeções mediolateral e craniocaudal no intuito de avaliar a presença ou ausência do ossículo meniscal. Nas radiografias realizadas, o ossículo esteve presente em 15% (n = 6), observando-se sua maior frequência em machos e unilateralmente, sendo o joelho esquerdo o de maior incidência da estrutura. Por ser um achado comum e relatado em diversas espécies selvagens de felídeos, a presença do ossículo meniscal deve ser levada em consideração e inserida como diagnóstico diferencial quando da realização de radiografias de gatos-domésticos e da visualização de opacidade intra-articular em projeções radiográficas mediolaterais da articulação femorotibiopatelar.
Review: Jordan, Eamonn. The theatre and films of Conor McPherson: conspicuous communities. Methuen, 2019.
Authors: Walsh Ian R.
Published: May 2020

Book Review of The Theatre and Films of Conor McPherson by Eamonn Jordan
Brian Friel on the french stage: from Laurent Terzieff to women directors of Dancing at Lughnasa
Authors: Pelletier Martine
Published: May 2020

The success of Brian Friel's drama on stage in the English-speaking world is beyond dispute. Many plays of his plays have also been widely translated leading to numerous productions worldwide. My concern in this article is with French-language productions. The focus in this article will be, first, on the association between Brian Friel and the late great French actor and director Laurent Terzieff, who introduced French theatre professionals and audiences to Friel; and secondly on Dancing at Lughnasa, the play that has been most often performed on French stages, with specific reference to productions twenty years apart by two women directors, Irina Brook (1999) and Gaëlle Bourgeois (2019).
Postdramatic Theatre and Form
Authors: Taylor-Batty Mark , Wickstrom Maurya , Reynolds James , Beswick Katie , Angelaki Vicky , Finburgh Clare , Brater Enoch
Published: May 2020

Postdramatic theatre is an essential category of performance that challenges classical elements of drama, including the centrality of plot and character. Tracking key developments in contemporary European and North American performance, this collection redirects ongoing debates about postdramatic theatre, turning attention to the overlooked issue on which they hinge: form.

Contributors draw on literary studies, film studies and critical theory to reimagine the formal aspects of theatre, such as space, media and text. The volume expands how scholars think of theatrical form, insisting that formalist analysis can be useful for studying the ways theatre is produced and consumed, and how theatre makers engage with other forms like dance and visual art. Chapters focus on a range of interdisciplinary artists including Tadeusz Kantor, Ann Liv Young and Ryan Trecartin and Lizzie Fitch, as well as theatre’s enmeshment within institutional formations like funding agencies, festivals, real estate and healthcare.

A timely investigation of the aesthetic structures and material conditions of contemporary performance, this collection refines what we mean, and what we don’t, when we speak of postdramatic theatre.
Education, Individualization and Neoliberalism
Authors: Visanich Valerie
Published: May 2020

Education, Individualization and Neoliberalism questions the individualization process in education in the Anglo-American context and analyses how this process is applied in the everyday life of millennials with tertiary education in Southern Europe. Valerie Visanich explores the close affinity of this concept to neoliberalism in contemporary societies, specifically by focusing on changes in education and employment. Using Beck & Beck-Gernsheim’s concept of individualization to refer to increased freedom in one’s life choices yet at the same time increased risks, Visanich unpacks the trajectories of life experiences of tertiary educated millennials in the contemporary neoliberal Anglo-American setting in relation to recent cultural and socio-economic changes. She examines how this individualized mode is adopted and adapted in countries across Southern Europe including Italy, Spain, Portugal, Malta and Greece – in locations where cultural conditions habitually cushion-out, often by family networks and patronage, some of the burdens of being young today.
Badiou Reframed
Authors: Ling Alex
Published: May 2020

He has been regarded with suspicion by some, as an anti-postmodernist who dared to write about unfashionable concepts such as truth and meaning. But in recent years, the philosopher Alain Badiou has risen in prominence, pioneering new ways to produce, conceptualise and discover art. Badiou Reframed is an original book about an original thinker which applies - for the first time - Badiou's philosophy to the visual arts. The six central concepts of this philosophy - ‘being and appearing’, ‘event and subject’ and ‘truth and ethics’ - are elucidated through detailed analysis of a range of visual artworks, including Marcel Duchamp's readymades, the abstract paintings of Kazimir Malevich and Mark Rothko, Banksy's contemporary street art, the sculpture of Alberto Giacometti, Stephane Mallarme's visual poetry and Victor Fleming's classic film The Wizard of Oz. In focusing on Badiou's critical relationship with the visual arts, Alex Ling reinterprets and represents not only the man, but art itself.
A new marine biogenic emission: methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea
Authors: Edtbauer Achim , Stönner Christof , Pfannerstill Eva Y. , Berasategui Matias , Walter David , Crowley John N. , Lelieveld Jos , Williams Jonathan
Published: May 2020

Abstract. We present the first ambient measurements of a new marine emission methane sulfonamide (MSAM: CH5NO2S), along with dimethyl sulfide (DMS) and dimethyl sulfone (DMSO2) over the Arabian Sea. Two shipborne transects (W → E, E → W) were made during the AQABA (Air Quality and Climate Change in the Arabian Basin) measurement campaign. Molar mixing ratios in picomole of species per mole of air (throughout this paper abbreviated as ppt) of DMS were in the range of 300–500 ppt during the first traverse of the Arabian Sea (first leg) and 100–300 ppt on the second leg. On the first leg DMSO2 was always below 40 ppt and MSAM was close to the limit of detection. During the second leg DMSO2 was between 40 and 120 ppt and MSAM was mostly in the range of 20–50 ppt with maximum values of 60 ppt. An analysis of HYSPLIT back trajectories combined with calculations of the exposure of these trajectories to underlying chlorophyll in the surface water revealed that most MSAM originates from the Somalia upwelling region, known for its high biological activity. MSAM emissions can be as high as one-third of DMS emissions over the upwelling region. This new marine emission is of particular interest as it contains both sulfur and nitrogen, making it potentially relevant to marine nutrient cycling and marine atmospheric particle formation.
Biomass burning aerosols in the southern hemispheric midlatitudes as observed with a multiwavelength polarization Raman lidar
Authors: Floutsi Athena Augusta , Baars Holger , Radenz Martin , Haarig Moritz , Yin Zhenping , Seifert Patric , Jimenez Cristofer , Wandinger Ulla , Engelmann Ronny , Barja Boris , Zamorano Felix , Ansmann Albert
Published: May 2020

Abstract. In this paper, we present long-term observations of the multiwavelength Raman lidar PollyXT conducted in the framework of the DACAPO-PESO campaign. Regardless the relatively clean atmosphere in the southern mid-latitude oceans region, we observed regularly events of long-range transported smoke, originating either from regional sources in South America or from Australia. Two case studies will be discussed. Both cases were identified as smoke events and they occurred on 5 February 2019 and 11 March 2019. 5 For the first case considered, the lofted smoke layer was located at an altitude between 1 and 4.2 km, and apart from the predominance of smoke particles, particle linear depolarization values indicated the presence of dust particles in the layer. Mean lidar ratio values at 355 and 532 nm were 49 ± 12 and 24 ± 18 sr respectively, while the mean particle linear depolarization was 7.6 ± 3.6 % at 532 nm. The advection of smoke and dust particles above Punta Arenas affected significantly the available CCN and INP in the lower troposphere, and triggered effectively ice crystal formation processes. Regarding the second case, the thin smoke layers were observed at altitudes between 5.5–7, 9 and 11 km. The particle linear depolarization ratio at 532 nm increased rapidly with height, starting from 2 % for the lowest two layers and increasing up to 9.5 % for the highest layer, indicating the possible presence of non-spherical coated soot aggregates. INP activation was effectively facilitated. The long-term analysis of the one year of observations showed that tropospheric smoke advection over Punta Arenas occurred 16 times (lasting from 1 to 17 hours), regularly distributed over the period and with high potential to influence cloud formation in the otherwise pristine environment of the region.
Helium in the Earth’s foreshock: a global Vlasiator survey
Authors: Battarbee Markus , Blanco-Cano Xochitl , Turc Lucile , Kajdič Primož , Johlander Andreas , Tarvus Vertti , Fuselier Stehphen , Trattner Karlheinz , Alho Markku , Brito Thiago , Ganse Urs , Pfau-Kempf Yann , Akhavan-Tafti Mojtaba , Karlsson Tomas , Raptis Savvas , Dubart Maxime , Grandin Maxime , Suni Jonas , Palmroth Minna
Published: May 2020

Abstract. The foreshock is a region of space upstream of the Earth's bow shock extending along the interplanetary magnetic field. It is permeated by shock-reflected ions and electrons, low-frequency waves, and various plasma transients. We investigate the extent of the He2+ foreshock using Vlasiator, a global hybrid-Vlasov simulation. We perform the first numerical global survey of the helium foreshock, and interpret some historical foreshock observations in a global context. The foreshock edge is populated by both proton and helium field-aligned beams, with the proton foreshock extending slightly further into the solar wind than the helium foreshock, and both extend well beyond the ULF wave foreshock. We compare our simulation results with MMS HPCA measurements, showing how the gradient of suprathermal ion densities at the foreshock crossing can vary between events. Our analysis suggests that the IMF cone angle and the associated shock obliquity gradient can play a role in explaining this differing behaviour. We also investigate wave-ion-interactions with wavelet analysis and show that the dynamics and heating of He2+ must result from proton-driven ULF waves. Enhancements in ion agyrotropy are found in relation to, e.g., the ion foreshock boundary, the ULF foreshock boundary, and specular reflection of ions at the bow shock. We show that specular reflection can describe many of the foreshock ion VDF enhancements. Wave-wave-interactions deep in the foreshock cause decoherence of wavefronts, allowing He2+ the be scattered less than protons.
Removal of phosphorus and nitrogen in sediments of the eutrophic Stockholm archipelago, Baltic Sea
Authors: van Helmond Niels A. G. M. , Robertson Elizabeth K. , Conley Daniel J. , Hermans Martijn , Humborg Christoph , Kubeneck L. Joëlle , Lenstra Wytze K. , Slomp Caroline P.
Published: May 2020

Abstract. Coastal systems can act as filters for anthropogenic
nutrient input into marine environments. Here, we assess the processes
controlling the removal of phosphorus (P) and nitrogen (N) for four sites in
the eutrophic Stockholm archipelago. Bottom water concentrations of oxygen
(O2) and P are inversely correlated. This is attributed to the seasonal
release of P from iron-oxide-bound (Fe-oxide-bound) P in surface sediments and from
degrading organic matter. The abundant presence of sulfide in the pore water
and its high upward flux towards the sediment surface (∼4 to
8 mmol m−2 d−1), linked to prior deposition of organic-rich
sediments in a low-O2 setting (“legacy of hypoxia”), hinder the
formation of a larger Fe-oxide-bound P pool in winter. This is most
pronounced at sites where water column mixing is naturally relatively low
and where low bottom water O2 concentrations prevail in summer. Burial rates
of P are high at all sites (0.03–0.3 mol m−2 yr−1), a combined
result of high sedimentation rates (0.5 to 3.5 cm yr−1) and high
sedimentary P at depth (∼30 to 50 µmol g−1).
Sedimentary P is dominated by Fe-bound P and organic P at the sediment
surface and by organic P, authigenic Ca-P and detrital P at depth. Apart
from one site in the inner archipelago, where a vivianite-type Fe(II)-P
mineral is likely present at depth, there is little evidence for
sink switching of organic or Fe-oxide-bound P to authigenic P minerals.
Denitrification is the major benthic nitrate-reducing process at all sites
(0.09 to 1.7 mmol m−2 d−1) with rates decreasing seaward from the
inner to outer archipelago. Our results explain how sediments in this
eutrophic coastal system can remove P through burial at a relatively high
rate, regardless of whether the bottom waters are oxic or (frequently)
hypoxic. Our results suggest that benthic N processes undergo annual cycles
of removal and recycling in response to hypoxic conditions. Further nutrient
load reductions are expected to contribute to the recovery of the eutrophic
Stockholm archipelago from hypoxia. Based on the dominant pathways of P and
N removal identified in this study, it is expected that the sediments will
continue to remove part of the P and N loads.
Warming increases soil respiration in a carbon-rich soil without changing microbial respiratory potential
Authors: Nyberg Marion , Hovenden Mark J.
Published: May 2020

Abstract. Increases in global temperatures due to climate change threaten to tip the balance between carbon (C) fluxes, liberating large amounts of C from soils. Evidence of warming-induced increases in CO2 efflux from soils has led to suggestions that this response of soil respiration (Rs) will trigger a positive land C–climate feedback cycle, ultimately warming the earth further. Currently, there is little consensus about the mechanisms driving the warming-induced Rs response, and there are relatively few studies from ecosystems with large soil C stores. Here, we investigate the impacts of experimental warming on Rs in the C-rich soils of a Tasmanian grassy sedgeland, and whether alterations of plant community composition or differences in microbial respiratory potential could contribute to any effects. In situ, warming increased Rs on average by 28 % and this effect was consistent over time and across plant community composition treatments. In contrast, warming had no impact on microbial respiration in incubation experiments. Plant community composition manipulations did not influence Rs or the Rs response to warming. Processes driving the Rs response in this experiment were, therefore, not due plant community effects and are more likely due to increases in belowground autotrophic respiration and the supply of labile substrate through rhizodeposition and root exudates. CO2 efflux from this high-C soil increased by more than a quarter in response to warming, suggesting inputs need to increase by at least this amount if soil C stocks are to be maintained. These results indicate the need for comprehensive investigations of both C inputs and losses from C-rich soils if efforts to model net ecosystem C exchange of these crucial, C-dense systems are to be successful.
Improvements in one-dimensional grounding-line parameterizations in an ice-sheet model with lateral variations
Authors: Pollard David , DeConto Robert
Published: May 2020

Abstract. The use of a boundary-layer parameterization of buttressing and ice flux across grounding lines in a two-dimensional ice-sheet model is improved by allowing general orientations of the grounding line. This and another modification to the model's grounding-line parameterization are assessed in two settings: a narrow fjord-like domain (MISMIP+), and in future simulations of West Antarctic ice retreat under RCP8.5-based climates. The new modifications are found to have significant effects on the fjord results, which are now within the envelopes of other models in the MISMIP+ intercomparison. In contrast, the modifications have little effect on West Antarctic retreat, presumably because dynamics in the wider major Antarctic basins are adequately represented by the model's previous simpler one-dimensional formulation. As future grounding lines retreat across very deep bedrock topography in the West Antarctic simulations, buttressing is weak and deviatoric stress measures exceed the ice yield stress, implying that structural failure at these grounding lines would occur. We suggest that these grounding-line quantities should be examined in similar projections by other ice models, to better assess the potential for future structural failure.
Research article: Household resilience to major slow kinetics floods: a prospective survey of the capacity to evacuate in high rise buildings in Paris
Authors: Rabemalanto Nathalie , Pottier Nathalie , Edjossan-Sossou Abla Mimi , Vuillet Marc
Published: May 2020

Abstract. This article presents the results of a prospective survey of households living in the only high rise residential buildings of Paris, which are located in a flood zone. It questions the behavior of households likely to be subject to evacuation instructions in the event of a progressive flooding impacting the functioning of the technical networks and associated urban services. The survey received 523 responses from 11 residential high-rise buildings located in the 15th district of Paris. It assessed the propensity of households to evacuate autonomously through three main factors: the capacity to self-evacuate, to self-host and to go to this temporary accommodation. The survey answers explicit requests for information by local authorities on inhabitants' capacities to self-evacuate and to self-host in order to support the formers' estimation of shelter requirements. The typology of evacuation capacities reveals that most of the respondents are partially dependent due to difficulties relating to re-accommodation issues. Furthermore, many people seems to have an incorrect perception of the public authorities' responsibilities. Information and warning systems could thus be improved, notably through a participative method.
Circulation of the European northwest shelf: a Lagrangian perspective
Authors: Ricker Marcel , Stanev Emil V.
Published: May 2020

Abstract. The dynamics of the European northwest shelf (ENWS), the surrounding deep
ocean, and the continental slope between them are analysed in a framework of
numerical simulations using Lagrangian methods. Several sensitivity
experiments are carried out in which (1) the tides are switched off, (2) the
wind forcing is low-pass filtered, and (3) the wind forcing is switched off.
To measure accumulation of neutrally buoyant particles, a quantity named the
“normalised cumulative particle density (NCPD)” is introduced. Yearly
averages of monthly results in the deep ocean show no permanent particle
accumulation areas at the surface. On the shelf, elongated accumulation
patterns persist in yearly averages, often occurring along the thermohaline
fronts. In contrast, monthly accumulation patterns are highly variable in
both regimes. Tides substantially affect the particle dynamics on the shelf
and thus the positions of fronts. The contribution of wind variability to
particle accumulation in specific regions is comparable to that of tides.
The role of vertical velocities in the dynamics of Lagrangian particles is
quantified for both the eddy-dominated deep ocean and for the shallow shelf.
In the latter area, winds normal to coasts result in upwelling and
downwelling, illustrating the importance of vertical dynamics in shelf seas.
Clear patterns characterising the accumulation of Lagrangian particles are
associated with the vertical circulations.
Resignificación y nuevos discursos sobre la maternidad en las plataformas digitales
Authors: Imbaquingo María Isabel , Dávila Ana Gabriela
Published: May 2020

Este artículo describe la propuesta discursiva de la plataforma web Nido Parlante sobre la maternidad y el rol social de la mujer-madre, con el objetivo de analizar si las características discursivas de la plataforma promueven un discurso y un imaginario alternativo al de la maternidad tradicional y hegemónica. Para esto, se seleccionó del archivo de la página todos los fragmentos discursivos y se aplicó un método de análisis de discurso simple, propuesto por Siegfried Jäger, el cual consistió en un análisis de estructura y un análisis fino de los fragmentos. Los resultados del análisis se confrontaron, principalmente, con la propuesta teórica de Adrienne Rich sobre la dicotomía entre la maternidad como institución y como experiencia, los no lugares de Marc Augè, que concibe a los medios digitales como espacios abiertos a la posibilidad  de nuevas relaciones y significaciones, y con la propuesta de mediación de Jesús Martín Barbero, que define a los medios de comunicación como espacios dinámicos de interacción y significación de los actores de la comunicación. El análisis reveló que Nido Parlante consolida un discurso disruptivo que cuestiona el rol tradicional de la mujer-madre, así como lo doméstico y lo privado como categorías excluyentes; además, concibe a la mujer-madre como protagonista en el plano tanto productivo como artístico, función tradicionalmente ocupada por el hombre. No obstante, también es posible identificar reproducciones del orden social en la resignificación del discurso de la maternidad, lo que genera la interrogante de si la reelaboración es posible solo para un determinado grupo de mujeres con acceso a los medios y de determinado contexto social.
Conocimiento, poder y religión
Authors: Fernández Martín Patricia
Published: May 2020

El objetivo del trabajo es demostrar que numerosas cuestiones teológico-filosóficas han sido obviadas durante siglos (o relegadas a la categoría de “místicas”, de menor prestigio social) por el simple hecho de provenir de mujeres. Para ello, entendiendo el conocimiento como una práctica axiológica, se distingue entre práctica científica (llevada a cabo por los hombres) y práctica religiosa (llevada a cabo por hombres y muy controlada en las mujeres) y asumiendo una diferencia entre la importancia de la investigadora como sujeto cognoscente y el papel de la investigada como objeto productor de conocimiento. Cuestionando, entonces, por qué no se pueden considerar discurso teológico-filosófico los diferentes fragmentos que mostramos del Libro de la vida de Teresa de Ávila, empleado aquí a modo de ejemplo, se efectúa su análisis desde los principales parámetros de la filosofía de la religión feminista: a) su experiencia mística como acceso al conocimiento de la divinidad, asumiendo la existencia de Dios e interactuando directamente con Él; b) el papel desempeñado por su cuerpo en el proceso de conocer lo sagrado y la consecuente ruptura del dualismo cuerpo-mente y c) las repercusiones éticas que todo esto conlleva en la superación teresiana de la paradoja cristiana del mal. La aportación primordial se encuentra en la aplicación de los principales rasgos de una filosofía feminista de la religión anglosajona a un caso español para defender la necesidad de que el discurso femenino se convierta sin tapujos en una fuente de conocimiento para la investigación, para construir tanto práctica científica como práctica religiosa, en un afán final de proponer la revisión, bajo esta perspectiva, de todas las obras femeninas redactadas a lo largo de la historia que han sido patriarcalmente etiquetadas como “literatura mística” o “literatura espiritual”.
Advertising Social Semiotic Representation: A Critical Approach
Authors: Najafian Maryam , Ketabi Saeed
Published: May 2020

The aim of this article was to show the usefulness of a Social Semiotics approach proposed by Kress and van Leeuwen (2006) in analyzing advertising discourse to achieve the aim of uncovering the ideology behind choosing different resources (verbal and non verbal). Two examples selected from 'Time' magazine showed that both textual and visual signs are among social semiotic resources which could help advertisers to convey persuasive messages under ideological assumptions. The result of this study revealed that social semiotic reference occupies a pivotal point in the relationship between advertising discourse and ideology. The image, word and color, seen in this way as the product of social practices, are just three of the many semiotic modes through which social meanings of advertisements are coded.
Empirical Investigation for Diagnosis of Knowledge Gaps: A Case Study in Industrial Companies
Authors: Ahmed AL-DUJAILI Mohammed A,
Published: May 2020

The term knowledge management (KM) is difficult to define. This is because its domain as identified in research and practice, has roots in many fields. This has led to the use of different methodologies and strategies that are based on the type of evaluation required in the work. Therefore, the study argues that this problem is leading to important gaps in understanding and identifying the conditions and the needs required for KM systems (KMS), as well as the methods divergent and inadequate in KM implementation. Six kinds of gap within the firms of the study topic are explained. Meanwhile, the study has used grounded theory to classification of the information in field interviews with senior managers and employees of four companies for diagnoses of the particular gaps in KMS, with a supported intensified analysis of the literature. In view of that, this paper has explored the role of KM in the industrial firms' and the limitation of obstacles to avoid the gaps. Furthermore, this study has suggested a businesslike framework and creative method, explaining comprehensively how KM must adjust for aligning employees' ideas with the firm's larger goals effectively and strategically, which will reduce the lack of harmonisation between the polarisation and implementation of KMS to those firms.
Linguagem, Unidade e Ordem: aspectos da teoria de Hobbes sobre a paz social
Authors: Pontin Fabrício
Published: May 2020

Este artigo procura estabelecer uma relação entre as dimensões epistemológicas e políticas da obra de Thomas Hobbes, focando, especialmente, no desenvolvimento de uma teoria do discurso e da linguagem na primeira parte do Leviathan, e na ligação desta teoria do discurso e da linguagem com a política e escatologia Hobbesiana.  Ao final do trabalho pretendo demonstrar que não obstante a incompatibilidade da tese norteadora de Hobbes com o liberalismo político contemporâneo podemos identificar na obra do autor duas teses fundamentais sobre legitimidade e representação que seguem orientando demandas por inclusão e igualdade em sociedades contemporâneas e liberais.
A história intelectual e a virada ontológica na antropologia
Authors: Armani Carlos Henrique
Published: May 2020

O presente artigo pretende mostrar uma investigação sobre a contribuição que a virada ontológica na antropologia contemporânea pode proporcionar para a história intelectual. Trata-se de pensá-la como uma resposta à virada linguística ao se evocar o primado ontológico conferido aos existentes, incluindo não humanos, o que reforça seu caráter materialista, por vezes antinarrativista e antitextualista. O artigo divide-se em três partes: a primeira apresenta algumas características da história intelectual no interior da virada linguística e para além dela; a segunda apresenta algumas ideias da virada ontológica na antropologia, consubstanciadas na antropologia simétrica, no perspectivismo ameríndio e na antropologia da natureza; por fim, lança mão de um exemplo empírico da história intelectual no Brasil que pode permitir uma leitura da obra como presença de duas ontologias: a naturalista e a animista. Trata-se da obra Os sertões, de Euclides da Cunha.