bluuebunny/crossref_metadata_2025 huggingface dataset:
Testing a multi-rotor unmanned aerial vehicle for spray application in high slope terraced vineyard
Authors: Sarri Daniele , Martelloni Luisa , Rimediotti Marco , Lisci Riccardo , Lombardo Stefania , Vieri Marco
Published: April 2019

Unmanned aerial vehicles (UAVs) are being increasingly used for the spraying of pesticides for crop protection in complex geographic terrains that are not easily accessible by operators. This experiment was conducted to investigate the sprayer performance of a commercial UAV, equipped with different types of nozzles, and compare this new technology with the sprayers usually used on small size mountain vineyards (i.e. a knapsack sprayer and a sprayer gun). Field tests were conducted in a small high slope terraced vineyard. The operative parameters of the sprayers were calculated. Data on droplet coverage, density and size were collected by using water sensitive papers attached with clips to the leaves and analysed. The results showed that the working capacity of the UAV was 2-fold that of the sprayer gun 1.6-fold that of the knapsack sprayer. Droplet coverage, density and size were variable and affected by the position of the targets (water sensitive papers) and the type of sprayer used.
Performance of a snow blower prototype mounted on different vehicles type
Authors: Manzone Marco , Ruffinengo Bruno
Published: April 2019

All transportation sectors, in many countries of the world have shown problems related to the presence of snow on roads. The purpose of this work was to evaluate the performances of a snow blower prototype that can be attached in front of different commercial vehicle types (quad-bike, car, and small tractor) specifically developed for urban areas and private use. The prototype was tested using three different pavement types (bare soil, concrete, and asphalt) and with different snow layer thickness (50, 100, 150, 200, 250, and 300 mm). The highest forward speed (2.51 km h–1) was obtained using the car on asphalt pavement working with a snow layer thickness of 50 mm. In contrast, the lowest forward speed (0.28 km h–1) was observed when the prototype was fixed to the quad-bike and it worked on concrete base with a snow depth of 300 mm. The forward speed, and consequently also the productivity, varied only as a function of snow thickness. The prototype has demonstrated functional quality in all testing conditions leaving only a snow residue after its passage of about 0.18 dm3 on 100 meter of road. The hourly fuel consumption varied between 6.56 and 6.68 litres highlighting an average specific fuel consumption of 319.5 g kWh–1. The snow blower prototype, as it demonstrated good performance in all tested working conditions, seems to be a valid solution in snow-removal especially in private areas where the equipment versatility plays a fundamental rule.
Sustainability of food production support services offered by Sustainable Agriculture Trust to subsistence farmers in Bikita District, Zimbabwe
Authors: Chivasa Norman
Published: April 2019

In developing countries, food production challenges continue to persist, despite interventions at household levels such as input provision to address farmers’ resource constraints and training in conservation farming to improve land use and management by farmers. In Bikita District of Zimbabwe, concerns over the viability of conservation farming and input support services in helping out subsistence farmers to mitigate food production challenges remain unresolved. This research, therefore, evaluated the sustainability of support services offered by the Sustainable Agriculture Trust to subsistence farmers taking Ward 13 of Bikita District as a case study. Data collection involved two qualitative methods, namely structured interviews and focus group discussions, with 32 household heads comprising 18 women and 14 men. Results showed that the capacity by subsistence farmers to continue practising conservation farming using retained maize, sorghum and cowpea seed varieties and still produce better yields even after the Sustainable Agriculture Trust’s exit justify the hypothesis that conservation farming is a sustainable food production intervention. This study therefore concludes that the proficiency by subsistence farmers in Ward 13 of Bikita District carries the implication that training household heads in conservation farming means developing more subsistence farmers capable of producing their own food even amidst unpredictable rains, heat waves and shortening rainfall seasons.
Convergence of a Newton algorithm for semi-discrete optimal transport
Authors: Kitagawa Jun , Mérigot Quentin , Thibert Boris
Published: April 2019

A popular way to solve optimal transport problems numerically is to assume that the source probability measure is absolutely continuous while the target measure is finitely supported. We introduce a damped Newton algorithm in this setting, which is experimentally efficient, and we establish its global linear convergence for cost functions satisfying an assumption that appears in the regularity theory for optimal transport.
Characterization of the essential spectrum of the Neumann–Poincaré operator in 2D domains with corner via Weyl sequences
Authors: Bonnetier Eric , Zhang Hai
Published: April 2019

The Neumann–Poincaré (NP) operator naturally appears in the context of metamaterials as it may be used to represent the solutions of elliptic transmission problems via potentiel theory. In particular, its spectral properties are closely related to the well-posedness of these PDE’s, in the typical case where one considers a bounded inclusion of homogeneous plasmonic metamaterial embedded in a homogeneous background dielectric medium. In a recent work, M. Perfekt and M. Putinar have shown that the NP operator of a 2D curvilinear polygon has an essential spectrum, which depends only on the angles of the corners. Their proof is based on quasi-conformal mappings and techniques from complex-analysis. In this work, we characterise the spectrum of the NP operator for a 2D domain with corners in terms of elliptic corner singularity functions, which gives insight on the behaviour of generalized eigenmodes.
ABC’s of Seat Comfort: A Historical Perspective
Authors: Ziolek Scott Allen
Published: April 2019

Although subjective measurements are critical for qualifying seat comfort in terms of good or bad, objective measurements are the basis for quantifying these differences and ultimately controlling seat comfort performance through engineering design specs, targets, and/or guidelines. Many objective automotive seat comfort tools and techniques used today are based on methods derived in the past. This paper examines the engineering problems and solutions that make these historical influences relevant today. Particular focus is given to design considerations for the A-surface, B-surface, and the compressed surface of the seating system.
Speed Analysis of Yawing Passenger Vehicles Following a Tire Tread Detachment
Authors: Beauchamp Gray , Pentecost David , Koch Daniel , Bortles William
Published: April 2019

This paper presents yaw testing of vehicles with tread removed from tires at various locations. A 2004 Chevrolet Malibu and a 2003 Ford Expedition were included in the test series. The vehicles were accelerated up to speed and a large steering input was made to induce yaw. Speed at the beginning of the tire mark evidence varied between 33 mph and 73 mph. Both vehicles were instrumented to record over the ground speed, steering angle, yaw angle and in some tests, wheel speeds. The tire marks on the roadway were surveyed and photographed.

The Critical Speed Formula has long been used by accident reconstructionists for estimating a vehicle’s speed at the beginning of yaw tire marks. The method has been validated by previous researchers to calculate the speed of a vehicle with four intact tires. This research extends the Critical Speed Formula to include yawing vehicles following a tread detachment event. The Critical Speed Formula was found to produce results of acceptable and known accuracy, provided the appropriate inputs are used for the given situation and several guidelines are observed. The inputs and guidelines for the use of the Critical Speed Formula for these tread detachment scenarios are discussed.

For all tests analyzed, the tire mark evidence was documented with survey equipment, photographs and drone footage. In the past, it may have been necessary to take tire mark radius measurements in the field for use in the Critical Speed Formula. However, with the advent of modern documentation techniques, radius measurements can be taken from a scaled scene diagram and acceptable accuracy in the speed calculations can be achieved.
Análise de interações Ciência-Tecnologia-Sociedade (CTS) e de níveis de alfabetização científica em uma atividade extensionista
Authors: Firme Ruth Do Nascimento , Nascimento Jonas João do
Published: April 2019

Neste trabalho os objetivos são analisar interações Ciência-Tecnologia-Sociedade (CTS) e identificar níveis de alfabetização científica em uma intervenção extensionista desenvolvida no âmbito do projeto de extensão Letramento Científico e Tecnológico em Escolas Públicas: discutindo interações CTS através de episódios do seriado Os Simpsons, desenvolvido em 2017 e apoiado pela Pró-Reitoria de Atividades de Extensão (PRAE) da Universidade Federal Rural de Pernambuco. A atividade extensionista em tela abordou a temática Radioatividade por meio do episódio “Holmer, o fazendeiro”, contou com a participação de 13 alunos da 3ª série do ensino médio, e foi realizada no auditório de uma das escolas com duração de duas aulas de 50 minutos cada. Os dados considerados para as análises foram as discussões dos alunos durante o debate, registradas em caderno de notas pelo bolsista de extensão e as respostas dos alunos ao questionário impresso. Os resultados das análises indicam que a intervenção extensionista possibilitou discussões sobre diferentes interações CTS e oportunizou aos alunos elementos para a alfabetização científica prática e cultural. Contudo, outras estratégicas metodológicas precisam ser redesenhadas com vistas à alfabetização científica cívica.
Morphology and Raman spectra of aerodynamically-classified soot samples
Authors: Baldelli Alberto , Rogak Steven Nicholas
Published: April 2019

Abstract. Airborne soot is emitted from combustion processes as aggregates of primary particles. The size of the primary particles and the overall aggregate size control soot transport properties, and prior research shows that these parameters may be related to the soot nanostructure. In this work, a laminar, inverted non-premixed burner has been used as a source of soot that is almost completely elemental carbon. The inverted burner was connected to an Electrostatic Low-Pressure Impactor, which collected particles on stages according to the aerodynamic diameter, from 0.3 to 10 μm. The morphology was analyzed using a Transmission Electron Microscope followed by image processing to extract projected area and average primary particle size for each aggregate (approximately 1000 aggregates analyzed in total for the 9 impactor stages). Carbon nanostructure was analyzed using a Raman spectrometer, and 5 absorption bands (D4, D1, D3, G, and D2) were fitted to the spectra to obtain an estimate of the carbon disorder. The average primary particle diameter increases from 15 to 30 nm as the impactor stage aerodynamic diameter increases. The D1, D3, D2, and D4 bands decreased (relative to the G band) with the particle size, suggesting that the larger aggregates have larger graphitic domains.
Discussion Piece
Authors: Attig John C
Published: April 2019

A brief discussion of the material in the newly published title from the Clarendon Edition of the Works of John Locke, Literary and Historical Writings.
Designing a “Thinking System” to Reduce the Human Burden of Care Delivery
Authors: Randhawa Gurvaneet S. , Xiao Yan , Gorman Paul N.
Published: April 2019

Cancer patients interact with clinicians who are distributed across locations and
organizations. This makes it difficult to coordinate care and adds to the burden of
cancer care delivery. Failures in care coordination can harm patients. The rapid growth
in the number of cancer survivors and the increasing complexity of cancer care has
kindled an interest in new care delivery models.Information technology (IT) is an
important component of care delivery. While IT can potentially enhance collaborative
work among people distributed across locations, organizations and time, the current
design and implementation of health IT adds to the human burden and often makes it a
part of the problem instead of the solution.A new paradigm is needed, therefore, to
drive innovations that reframe health IT as an enabler (and a component) of a “thinking
system,” in which patients, caregivers, and clinicians, even when distributed across
locations and time, can collaborate to deliver high-quality care while decreasing the
burden of care delivery. In a thinking system, the design of collaborative work in
health care delivery is based on an understanding of complex interplay among social and
technological components. We propose six core design properties for a thinking system:
task coordination; information curation; creative and flexible organizing; establishing
a common ground; continuity and connection; and co-production. A thinking system is
needed to address the complexity of coordination, meet the rising expectation of
personalized care, relieve the human burden in care delivery, and to deliver the best
quality care that modern science can provide.
Core Inflation, Expectations and Inflation Dynamics in Brazil
Authors: de Brito Antônio Clécio , Arruda Elano Ferreira , Castelar Ivan , Neto Nicolino Trompieri , Santos Cristiano
Published: April 2019

This work investigates the adequacy of core inflation measures as indicators of forward-looking expectations in the hybrid new Keynesian Phillips curve (HNKPC) for the Brazilian economy. For that purpose, we use monthly data between January 2002 and August 2015 and the heteroscedasticity and autocorrelation consistent generalized method of moments (HAC-GMM). The results indicate that the HNKPC is a robust mechanism to model Brazilian inflation dynamics in the period analyzed; that the recent increase in the degree of indexation of the Brazilian economy seems to have contributed to the formation of a stronger inertial component of inflation; and also that the core inflation measures appear to be potential indicators to model forward-looking expectations in the HNKPC in Brazil. Furthermore, the inflation forecasts extracted from these models are statistically similar to those generated by models that use market prognoses from the Focus survey published by the Central Bank of Brazil. Therefore, the core inflation measures appear to have adequately anchored the inflation expectations in Brazil in the period analyzed.
Factors of Stock Return and Carhart Model: The Case of Dhaka Stock Exchange (DSE) of Bangladesh
Authors: Hossan Mohammad Akter , Abedin Mohammad Joynal
Published: April 2019

The objective of this study is to find factors of stock return by testing validity of Carhart model in Dhaka Stock Exchange (DSE) of Bangladesh. For this purpose, this study uses monthly excess return of portfolios, size, book-to-market value, market return, and price momentum data of 109 sample firms to calculate return factors such as market risk premium, size premium (SMB), value premium (HML), and momentum effect (UMD) for the sample period of 2005 to 2014. Then a total of ten portfolios, six based on size and book-to-market value and four based on size and price momentum, are constructed in this study. Excess return of each of these portfolios are calculated and regressed on the above four factors. Results of this study reveal that in DSE, market risk premium is positively and significantly related with the excess return of all portfolios; Size premium is found positively and significantly related with the return of small size portfolios; Value premium is found negatively and significantly related with the returns of all portfolios except one big portfolio (B/H); momentum effect is found positively and significantly related to the excess return of up (U), big (B), and small (S) size portfolios. It is also evident from R2 value, F statistic, and robustness test of this study that four-factor model is valid and it can predict portfolio returns accurately when there is no abnormality such as market crash occurs in DSE.
Migratie en werk: over achterstand én verbetering
Authors: Dekker Fabian , Lucassen Leo
Published: April 2019

Migration and employment: a story of vulnerable positions and upward mobility

This editorial offers an introduction to the special issue on migration and employment.
De politieke economie van macro-economische onbalansen in de eurozone
Authors: Rodenburg Peter
Published: April 2019

The Political Economy of Macroeconomic Imbalances in the Eurozone

The introduction of the euro led to large macroeconomic imbalances between
Euro countries. Under pressure from the euro crisis, the European Commission adopted EU
regulations 1174/2011 and 1176/2011 in 2011 with the aim of reducing these macroeconomic
imbalances.
These measures include the Macroeconomic Imbalance Procedure to identify macroeconomic
imbalances and, if necessary, to prompt Member States to take corrective action.
This article provides an overview of this recent EU policy for countering imbalances and
provides a political-economic analysis of the macroeconomic imbalances in Europe and its
consequences. In particular, it focuses on the conflicting interests of the euro-area countries
with current account surpluses and deficits. This article also analyses the possibilities offered by
the 2019 European election for European policy makers to strengthen this policy.
The article concludes that the surplus countries, despite the apparent advantage of
trade balance surpluses, do have an interest in reducing imbalances in the EU but fail to
translate this into actual policy. The Commission’s role in reducing imbalances is likely to remain
limited, even after the 2019 European elections.
De aanpak van belastingontwijking door de EU: gerichte maatregelen zonder structurele verandering.
Authors: Römgens Indra
Published: April 2019

The European Union’s fight against tax avoidance: targeted measures but no structural changes

According to the outgoing European Commissioner Pierre Moscovici, the
European Union (EU) has made more progress in tackling tax avoidance and evasion in the last
five years than in the twenty years before that. This article argues that although several targeted
measures have indeed been adopted, such as automatic exchange of tax rulings and limitations
on interest deductions, this has not led to a structural change in EU corporate tax policies, nor in
underlying power relations. The article discusses the politics of a number of recent policy
developments related to tax avoidance and evasion by transnational corporations. It argues that
the adoption of targeted measures, and the simultaneous stalling of more comprehensive
approaches – in terms of tax transparency or a common consolidated corporate tax base – can
be explained by recent tax controversies, international politics, and the dynamics within and
between EU institutions. Particular attention is paid to the role of the European Parliament that
is formally limited, but still houses progressive forces that have continuously pushed for a
clampdown on tax avoidance. Finally, the article pleads for more transparent EU
decision-making, specifically concerning discussions with and within the Council, in order to
improve the democratic legitimacy of EU corporate tax policies and processes.
Publicatiedruk bestaat niet (en als het er was, zou ’t goed zijn)
Authors: van den Besselaar Peter
Published: April 2019

Publication pressure does not exist (and if it did, it would be a good thing)

Reflection and debate initiates academically inspired discussions on issues that are on the current policy agenda.
Op naar de doe-mee-cratie!
Authors: Huisman Gerben , Brok Arno
Published: April 2019

Op naar de doe-mee-cratie!

Reflection and debate initiates academically inspired discussions on issues that are on the current policy agenda.
Sociale menging? Vergeet de elitewijken niet!
Authors: Hochstenbach Cody
Published: April 2019

Social mixing? Do not ignore the elite neighbourhoods!

The most relevant part of a discussion is not what is discussed but what cannot be spoken of. The real taboos are those for which it is taboo to call them taboos. The status quo defines itself as non-ideological while denouncing any challenge to itself as radical. Therefore the column ‘De Blinde Vlek’ frames the framers, politicizes the status quo and articulates what is not heard of.
Vertrouwen in toezichtsactoren in uitgaansgebieden: een vergelijking tussen politie, portiers en cameratoezicht
Authors: van Doorn Janne , Brands Jelle
Published: April 2019

Trust in nightlife policing actors: a comparison between police, door staff, and CCTV

While studies on trust in the police are numerous, this is much less the case for other policing actors. It is important to examine this in the light of the increasing number and diversification of policing actors and their legitimacy. Using a survey, 894 youngsters were asked to evaluate their trust in actors involved in the policing of urban nightlife areas: the police, door staff, and CCTV. Results showed that people tend to trust human actors of surveillance more compared to technological actors, however different (demographic and contextual) factors nuance this pattern.
Gesloten jeugdinrichtingen in Nederland en België: anders maar hetzelfde?
Authors: Purperhart Charmaine
Published: April 2019

Dutch and Belgian closed juvenile detention centres: quite different or virtually the same? A comparative legal research between Dutch and Belgian closed juvenile detention centres, focused on the internal legal status

A comparative legal research between Dutch and Belgian closed juvenile detention centres, focused on the internal legal status
Achter de schermen bij een pro justitia onderzoek in Teylingereind: de toegevoegde waarde van klinische observatie bij moeilijk onderzoekbare jeugdigen
Authors: Groeneweg Merijne , van den Dorpel Harmen
Published: April 2019

Behind the scenes at diagnostic research pro Justitia at Teylingereind: the added value of clinical observation of youth and young adults who are difficult to examine

This article merely outlines the methods of Teylingereind with respect to youth and young adult suspects who are difficult to examine, based on five cases. By collecting and combining data about this group from a range of different perspectives, better insight about the specific person was obtained in each of the cases as described. When it is possible to describe specific behavioural patterns, statements could be made about freedom of behavioural choices, danger of recidivism, and advice about the most appropriate legal framework. In this way, when there are serious concerns about the developmental course of youth and young adults who are not willing to cooperate in diagnostic research pro Justitia, clinical observation is of added value to the judge.
Photochromic Polypropylene Filaments: Impacts of Mechanical Properties on Kinetic Behaviour
Authors: Periyasamy Aravin Prince , Vikova Martina , Vik Michal
Published: April 2019

Spiro [2H-indole-2,3'-[3H]naphth[2,1-b][1,4]oxazine],1,3-dihydro-1,3,3-trimethyl-6'-(1-piperidinyl) was incorporated onto polypropylene and photochromic polypropylene multifilaments produced through the mass coloration technique. Subsequently the polypropylene (PP) filaments were doped with a different concentration of photochromic pigment, and after producing the filaments different drawing ratios were applied. The photochromic colour build was found to be maximum with the highest concentration of dyes as well as with the lowest drawing ratio. Also the colour differences for L*, a*, b* and ΔE* were analysed with respect to the different concentrations and drawing ratios of the filament. The filaments generally showed good stability of photocoloration during the colour measurement till five cycles. The results for the optical density were reduced by increasing the fineness of the filament. In this experimental work, the impact of the drawing ratio on the optical and mechanical properties of these multifilaments were investigated.
Moisture Management Properties of Seersucker Woven Fabrics of Different Structure
Authors: Matusiak Małgorzata
Published: April 2019

Moisture management is defined as the controlled movement of water vapour and liquid water (perspiration) from the surface of the skin to the atmosphere through the fabric. The ability of moisture transport is a very important feature of textile materials from the point of view of the physiological comfort of usage clothing made of these materials. Among the different textile materials (woven, knitted and nonwoven), seersucker woven fabric is considered as having good comfort-related properties. The fabrics are characterised by the occurrence of puckered and flat strips in the warp direction. The puckered effect generates air spaces between the body and the fabric, keeping the wearer cool in hot conditions as the puckered area holds the fabric away from the skin during usage. In the work presented, seersucker woven fabrics of different patterns of the puckered strips were investigated. The aim of the work was to analyse the relationship between the structure of seersucker fabrics and their moisture management properties. Measurement of the moisture transport properties of seersucker woven fabrics was made using a Moisture Management Tester M290, produced by SDL Atlas. Investigations performed showed that the properties of seersucker woven fabrics characterising their ability to transfer liquid moisture are different depending on the variant of the repeat of puckered strips.
Nyere forskningsresultater på andrespråksskriving i Norge og Sverige med særlig vekt på andrespråkselevers skriving i skolefagene
Authors: Golden Anne , Magnusson Ulrika
Published: April 2019

Denne artikkelen gir en oversikt over norsk og svensk forskning på andrespråksskriving fra det siste tiåret. Tre hovedområder som har generert flere studier og nye perspektiver i de to landenes andrespråksforskning, er skilt ut: 1) Forskning relatert til skolefag, sjangere og registre, 2) Forskning på ordforråd i en skolekontekst, og 3) Flerspråklig bruk i skrift. Disse områdene er eksemplifisert i artikkelen og kontekstualisert teoretisk, og er også relatert til tidligere norsk og svensk andrespråksforskning om tekst og ordforråd. Didaktiske implikasjoner av disse nyere innsiktene diskuteres også. Resultatene i de studiene vi har gjennomgått, viser at det i undervisningen er behov for å arbeide med skriftlig materiale, slik som med lærebøker og modelltekster i forkant av skrivingen, så vel som med ordforrådet. Studiene viser også nytten av flerspråklig bruk i undervisning.Nøkkelord: andrespråksskriving, systemisk-funksjonelt rammeverk, skriving i skolefagene, inndeling av ordforrådet, flerspråklig bruk i skriftRecent research on second language writing in Norway and Sweden, with particular emphasis on minority students’ writing in school subjectsAbstractThis article provides an overview of Norwegian and Swedish research on second language writing from the last decade. Three main areas that have generated several studies and new perspectives in the two countries’ second-language research are identified: 1) Research related to school subjects, genres and registers, 2) Research on vocabulary in a school context, and 3) Multilingual use in writing. These areas are exemplified in the article and contextualized theoretically, and are also related to previous Norwegian and Swedish second-language research on text and vocabulary. Didactic implications of these recent insights are also discussed. The results of the studies we have explored show that in teaching it is essential to work with written material such as textbooks and model texts prior to the writing as well as with the vocabulary. The studies also show the usefulness of multilingual use in teaching.Keywords: second-language writing, systemic-functional framework, writing in school subjects, vocabulary categorization, multilingual use in writing
Late Triassic-Late Cretaceous Paleogeography of Mexico and the Gulf of Mexico
Authors: Sánchez Padilla y , José Ricardo
Published: April 2019

Most plate tectonic models for the opening of the Gulf of Mexico focus on the fit of different crustal blocks, regional faults, the areal extent of abnormal oceanic crust, transitional crust, and continental crust, as well as on today's geophysical data, but only a few include paleogeographic data. High quality paleogeographic maps are available for the northern part of the Gulf of Mexico, but the same type of information for the southern part is difficult to obtain. However, information from many published sources has been used to compile a series of maps of the entire country of Mexico, including the Gulf of Mexico.

The main objective of this project is to build-up palinspastic paleogegraphic maps of Mexico through the Mesozoic, where the various marine and transitional sedimentary facies are restored to their original geographical positions prior to folding and faulting, and then are overlapped on the tectonic blocks involved in the most popular plate tectonics models. The data contained in these maps correspond to outcrops in continental Mexico and to published subsurface data in the marine areas.
Regional Correlation of Lithofacies Within the Haynesville Formation from Onshore Alabama: Analysis and Implications for Provenance and Paleostructure
Authors: Essex Caleb W. , Robinson Delores M. , Weislogel Amy L.
Published: April 2019

Although the Upper Jurassic Haynesville Formation is a proven hydrocarbon reservoir in the onshore eastern Gulf of Mexico, the unit remains understudied because exploration has been focused on the older and more productive Norphlet and Smackover Formations. In this study, we use cores, gamma ray logs, and spontaneous potential logs from 49 wells in southern Alabama to analyze the Haynesville Formation. We point-counted 18 sandstone samples from seven cores, and six sandstone samples from four of those cores were analyzed for detrital zircon age distributions. Core and well log analyses indicate that the Haynesville Formation can be subdivided into anhydrite, sandstone, and carbonate lithofacies. The thickness and distribution of these lithofacies suggests that relict basement topography derived from the opening of the eastern Gulf of Mexico during Late Triassic-Early Jurassic time is the primary influence on Upper Jurassic sediment distribution. Framework grain compositions indicate that the sandstone lithofacies was derived from a recycled orogenic provenance, indicating a primarily Laurentian terrane source with some mixing from the Gondwanan Suwannee terrane. Detrital zircon age distributions from Haynesville Formation sandstones contain major age populations that correspond with derivation from both the Laurentian Grenville Province and Appalachian Mountain source rocks, with some mixing from the Gondwanan Suwanee terrane. Haynesville Formation detrital zircon ages and sandstone compositions are similar to that of the underlying Norphlet Formation, indicating that the provenance and sediment transport pathways remained similar through deposition of the Upper Jurassic units.
Confluencias entre la educación artística y las tecnologías de la imagen
Authors: Gianottii Gonzalo Vicci
Published: April 2019

En nuestra contemporaneidad, la fotografía y a las imágenes presentan un amplio espacio de posibilidades de trabajo en torno a la educación artística. Cotidianamente nos enfrentamos a una sucesión de recursos y dispositivos tecnológicos que podemos utilizar como herramientas, que contienen implícitamente disparadores que nos permiten plantear discusiones y reflexiones en cuanto a su utilización como estrategias educativas, obligando a replantear incluso los alcances de las imágenes y su relación con los individuos. Nen este texto se proponen algunos abordajes que nos permiten pensar en la relevancia que revisten las imágenes – en particular las fotografías – en la construcción de imaginarios personales y colectivos. Se propone reflexionar en torno a la forma en que se han reformulado las concepciones que, en relación a la imagen fotográfica, se manejaron desde la segunda mitad del siglo XX y la manera en que la fotografía – desde su invención – ha transitado por diversos cambios tecnológicos que han impactado y reorientado su utilización e impacto en el uso cotidiano y profesional.
Littérature suspecte
Authors: Bérard Cassie , Lamarche Jean-Philippe
Published: April 2019

La littérature a horreur des complices. Penser l’expérience de lecture en ces termes permet d’entrevoir certains effets de mise à distance que génère un pan de la littérature narrative des XXe et XXIe siècles, tenu en suspicion. Ce parti pris d’émancipation — où le texte s’autonomise et le récit se complexifie jusqu’à dissimuler, étouffer, voire anéantir sa propre mécanique — pousse aussi à contester certains ressorts de la fiction : y a-t-il, en fin de compte, dans la « feintise ludique », un partage honnête entre l’auteur et le lecteur?
Petit précis d’antipathie narratoriale
Authors: Wagner Frank
Published: April 2019

Si la notion d’antipathie intéresse au premier chef psychologie et philosophie morale, elle n’en concerne pas moins les études littéraires, sensibles à la question de l’axiologie. Certains personnages fictionnels sont ainsi conçus en vue de provoquer l’antipathie des lecteurs. Mais qu’en est-il du narrateur? C’est à cette question, convoquant les problématiques de l’ethos, des valeurs et des normes évaluatives, qu’on s’intéresse ici.
Automythomanies littéraires
Authors: Guéna Béatrice
Published: April 2019

Dans leur œuvre autofictionnelle, certains auteurs ne cessent d’égarer le lecteur, de le tromper (Eric Chevillard), de faire usage de faux littéraires (W.G. Sebald, Enrique Vila-Matas). Mystificateurs, ils inventent des écrivains ou des textes d’écrivains réels, abolissant la frontière entre le réel et l’imaginaire. Ces écrivains automythomanes semblent des personnages de leur propre univers…
Installation ou sculpture?
Authors: Hardy Dominic
Published: April 2019

Ce texte, qui trace le parcours d’une œuvre de Carl Beam depuis sa présentation à Peterborough en 1989 jusqu’à son intégration à la collection permanente du Musée des beaux-arts du Canada en 2010, interroge le statut de la première itération d’un projet dont le passage hors du cadre local transforme cet évènement (exposition conçue pour un lieu et temps précis) en archive d’un présent, toujours national, détaché du territoire qui est une de ses conditions d’émergence.
Is God nothingness or blackness? – literature as a platform for integration of religious discourse(s) and the discourse of (natural) sciences
Authors: Zyga Magdalena
Published: April 2019

The aim of the paper is to show how conceptual metaphors and metonymies, combined with other factors, enable literature to integrate specialized discourses, in accordance with the theory of Jürgen Link (1983) and his notion of interdiscourse (ger. Interdiskurs). We posit that in our research material, i.e. selected poems and lyrics, elements of two kinds of religious discourses – the discourse of Christian apologetics and atheist or anttheist discourse – are linked together with the elements of the discourse of (natural) sciences, especially with a view to enhancing the e ectiveness of persuasion. As the method of analysis the DIMEAN (linguistic multi-level discourse analysis) model (Warnke/ Spitzmüller 2008) is used, which has hitherto been applied almost exclusively to analyse German-language discourse.
Comparison of the Effectiveness of Alum, Chlorine, Sodium Hypochlorite and Moringa’s Seeds in Reducing Bacterial Loads in the Treatment of Restaurant Wastewater
Authors: Fasuan O. S. , Odeyemi A. T. , Fasuan S. O.
Published: April 2019

The effectiveness of different wastewater-treating agents were individually analysed and compared to one another in reducing bacterial counts (total bacterial and total coliform counts) during the treatment of restaurant wastewater. These agents include alum, chlorine, sodium hypochlorite and seeds of Moringa oleifera. Wastewater samples were collected at interval and analysed for bacteriological and physiochemical properties. Bacteriological analyses include total bacterial and coliform counts, while physiochemical analyses include pH, total titratable acidity (TTA), biochemical oxygen demand (BOD), total hardness, alkalinity and mineral components. Moringa oleifera seeds, was found to be very effective as a sedimentation agent, but least effective in reducing bacterial counts. Also, it was discovered that the seeds of M. oleifera aid the increase in the bacterial population. Alum, a non-bactericidal, sedimentation agent, was found to reduce total bacterial and coliform counts mainly by the use of flocculation. Chlorine was found to be bactericidal against all bacteria except Pseudomonas aeruginosa, while sodium hypochlorite was found to be most effective in reducing bacterial growth during the study.
Plasmas Computed with ATMED CR of the 3rd Non-LTE Code Comparison Workshop Database
Authors: Benita A. J.
Published: April 2019

In this paper, there are presented some results calculated with ATMED CR of the 3rd Non-LTE Code Comparison Workshop held in December 2003, when this software didn’t exist, having been released in 2017. NLTE population kinetics codes were tested of steady-state cases for C, Al, Ar, Ge, Xe and Au plasmas selected for detailed comparisons. The scope of the meeting consisted of analyzing steady-state dense plasma cases of carbon, low temperature plasmas of aluminium and argon, X-ray laser experiments of germanium also with imposing a Planckian radiation field, medium- and high-Z multicharged ions of hot “experiment-related” plasmas of xenon, using real electron temperature and density parameters inferred from electronic and ionic Thomson scattering spectra and finally plasmas of gold. Being motivated by germanium X-ray laser experiments, the time history of electronic temperature Te and density Ne for a temporal dependent case is provided in Workshop NLTE-3. The calculation with ATMED CR has been carried out to t = 1.975 ns considering the non-uniform time grid along with the corresponding values of Te and Ne presented, being the initial condition LTE at low temperature. 

The results for plasma properties can be considered as relatively precise and optimal, being checked fundamentally the high sensitivity of calculations to changes in regime, local thermodynamic equilibrium (LTE) or non-LTE (NLTE), electronic and radiation temperatures, electronic density and the percentage of hot electrons. Frequency resolved and mean opacities are also displayed computed with ATMED CR using UTA (Unresolved Transition Array) or Mixed UTA formalisms.
Highly computationally efficient state filter based on the delta operator
Authors: Zhang Xiao , Ding Feng , Xu Ling , Yang Erfu
Published: April 2019

The Kalman filter is not suitable for the state estimation of linear systems with multistate delays, and the extended state vector Kalman filtering algorithm results in heavy computational burden because of the large dimension of the state estimation covariance matrix. Thus, in this paper, we develop a novel state estimation algorithm for enhancing the computational efficiency based on the delta operator. The computation analysis and the simulation example show the performance of the proposed algorithm.
Ultrathin 2D Rare‐Earth Nanomaterials: Compositions, Syntheses, and Applications
Authors: Xu Jun , Chen Xiaoyun , Xu Yueshan , Du Yaping , Yan Chunhua
Published: April 2019

Ultrathin 2D nanomaterials possess promising properties due to electron confinement within single or a few atom layers. As an emerging class of functional materials, ultrathin 2D rare‐earth nanomaterials may incorporate the unique optical, magnetic, and catalytic behaviors of rare‐earth elements into layers, exhibiting great potential in various applications such as optoelectronics, magnetic devices, transistors, high‐efficiency catalysts, etc. Despite its importance, reviews on ultrathin 2D rare‐earth nanomaterials or related topics are rare and only focus on a certain family of ultrathin 2D rare‐earth nanomaterials. This work is the first comprehensive review in this impressive field, which covers all families of ultrathin 2D rare‐earth nanomaterials, illustrating their compositions, syntheses, and applications. After summarizing the current achievements, the challenges and opportunities of future research on ultrathin 2D rare‐earth nanomaterials are evaluated.
PDZ Domains as Drug Targets
Authors: Christensen Nikolaj R. , Čalyševa Jelena , Fernandes Eduardo F. A. , Lüchow Susanne , Clemmensen Louise S. , Haugaard‐Kedström Linda M. , Strømgaard Kristian
Published: April 2019

Protein–protein interactions within protein networks shape the human interactome, which often is promoted by specialized protein interaction modules, such as the postsynaptic density‐95 (PSD‐95), discs‐large, zona occludens 1 (ZO‐1) (PDZ) domains. PDZ domains play a role in several cellular functions, from cell–cell communication and polarization, to regulation of protein transport and protein metabolism. PDZ domain proteins are also crucial in the formation and stability of protein complexes, establishing an important bridge between extracellular stimuli detected by transmembrane receptors and intracellular responses. PDZ domains have been suggested as promising drug targets in several diseases, ranging from neurological and oncological disorders to viral infections. In this review, the authors describe structural and genetic aspects of PDZ‐containing proteins and discuss the current status of the development of small‐molecule and peptide modulators of PDZ domains. An overview of potential new therapeutic interventions in PDZ‐mediated protein networks is also provided.
Record Open‐Circuit Voltage Wide‐Bandgap Perovskite Solar Cells Utilizing 2D/3D Perovskite Heterostructure
Authors: Gharibzadeh Saba , Abdollahi Nejand Bahram , Jakoby Marius , Abzieher Tobias , Hauschild Dirk , Moghadamzadeh Somayeh , Schwenzer Jonas A. , Brenner Philipp , Schmager Raphael , Haghighirad Amir Abbas , Weinhardt Lothar , Lemmer Uli , Richards Bryce S. , Howard Ian A. , Paetzold Ulrich W.
Published: April 2019

In this work, the authors realize stable and highly efficient wide‐bandgap perovskite solar cells that promise high power conversion efficiencies (PCE) and are likely to play a key role in next generation multi‐junction photovoltaics (PV). This work reports on wide‐bandgap (≈1.72 eV) perovskite solar cells exhibiting stable PCEs of up to 19.4% and a remarkably high open‐circuit voltage (VOC) of 1.31 V. The VOC‐to‐bandgap ratio is the highest reported for wide‐bandgap organic−inorganic hybrid perovskite solar cells and the VOC also exceeds 90% of the theoretical maximum, defined by the Shockley–Queisser limit. This advance is based on creating a hybrid 2D/3D perovskite heterostructure. By spin coating n‐butylammonium bromide on the double‐cation perovskite absorber layer, a thin 2D Ruddlesden–Popper perovskite layer of intermediate phases is formed, which mitigates nonradiative recombination in the perovskite absorber layer. As a result, VOC is enhanced by 80 mV.
Densely Populated Isolated Single CoN Site for Efficient Oxygen Electrocatalysis
Authors: Wu Jiabin , Zhou He , Li Qun , Chen Ming , Wan Jun , Zhang Nian , Xiong Liukang , Li Song , Xia Bao Yu , Feng Guang , Liu Meilin , Huang Liang
Published: April 2019

Atomically dispersed transition metals confined with nitrogen on a carbon support has demonstrated great electrocatalytic performance, but an extremely low concentration of metal atoms (usually below 1.5%) is necessary to avoid aggregation through sintering which limits mass activity. Here, a salt‐template method to fabricate densely populated, monodispersed cobalt atoms on a nitrogen‐doped graphene‐like carbon support is reported, and achieving a dramatically higher site fraction of Co atoms (≈15.3%) in the catalyst and demonstrating excellent electrocatalytic activity for both the oxygen reduction reaction and oxygen evolution reaction. The atomic dispersion and high site fraction of Co provide a large electrochemically active surface area of ≈105.6 m2 g−1, leading to very high mass activity for ORR (≈12.164 A mgCo−1 at 0.8 V vs reversible hydrogen electrode), almost 10.5 times higher than that of the state‐of‐the‐art benchmark Pt/C catalyst (1.156 A mgPt−1 under similar conditions). It also demonstrates an outstanding mass activity for OER (0.278 A mgCo−1). The Zn‐air battery based on this bifunctional catalyst exhibits high energy density of 945 Wh kgZn−1 as well as remarkable stability. In addition, both density functional theory based simulations and experimental measurements suggest that the CoN4 sites on the carbon matrix are the most active sites for the bifunctional oxygen electrocatalytic activity.
MXene‐Contacted Silicon Solar Cells with 11.5% Efficiency
Authors: Fu Hui‐Chun , Ramalingam Vinoth , Kim Hyunho , Lin Chun‐Ho , Fang Xiaosheng , Alshareef Husam N. , He Jr‐Hau
Published: April 2019

MXene, a new class of 2D materials, has gained significant attention owing to its attractive electrical conductivity, tunable work function, and metallic nature for wide range of applications. Herein, delaminated few layered Ti3C2Tx MXene contacted Si solar cells with a maximum power conversion efficiency (PCE) of ≈11.5% under AM1.5G illumination are demonstrated. The formation of an Ohmic junction of the metallic MXene to n+‐Si surface efficiently extracts the photogenerated electrons from n+np+‐Si, decreases the contact resistance, and suppresses the charge carrier recombination, giving rise to excellent open‐circuit voltage and short‐circuit current density. The rapid thermal annealing process further improves the electrical contact between Ti3C2Tx MXene and n+‐Si surface by reducing sheet resistance, increasing electrical conductivity, and decreasing cell series resistance, thus leading to a remarkable improvement in fill factor and overall PCE. The work demonstrated here can be extended to other MXene compositions as potential electrodes for developing highly performing solar cells.
The association between newborn screening analytes and childhood autism in a Texas Medicaid population, 2010–2012
Authors: Canfield Mark A. , Langlois Peter H. , Rutenberg Gary W. , Mandell Dorothy J. , Hua Fei , Reilly Brendan , Ruktanonchai Duke J. , Jackson Janice F. , Hunt Patricia , Freedenberg Debra , Lee Rachel , Villanacci John F.
Published: April 2019

Autism (or autism spectrum disorder [ASD]) is an often disabling childhood neurologic condition of mostly unknown cause. It is commonly diagnosed at 3 or 4 years of age. We explored whether there was an association of any analytes measured by newborn screening tests with a later diagnosis of ASD. A database was compiled of 3–5 year‐old patients with any ASD diagnosis in the Texas Medicaid system in 2010–2012. Two controls (without any ASD diagnosis) were matched to each case by infant sex and birth year/month. All study subjects were linked to their 2007–2009 birth and newborn screening laboratory records, including values for 36 analytes or analyte ratios. We examined the association of analytes/ratios with a later diagnosis of ASD. Among 3,258 cases and 6,838 controls, seven analytes (e.g., 17‐hydroxyprogesterone, acylcarnitines) were associated with a later ASD diagnosis. In this exploratory study, an ASD diagnosis was associated with 7 of 36 newborn screening analytes/ratios. These findings should be replicated in other population‐based datasets.