bluuebunny/crossref_metadata_2025 huggingface dataset:
Second Grade Bioconvective Nanofluid Flow with Buoyancy Effect and Chemical Reaction
Authors: Shafiq Anum , Rasool Ghulam , Khalique Chaudry Masood , Aslam Sohail
Published: April 2020

This study mainly concerns with the examination of heat transfer rate, mass and motile micro-organisms for convective second grade nanofluid flow. The considered model comprises of both nanoparticles as well as gyrotactic micro-organisms. Microorganisms stabilize the suspension of nanoparticles by bio-convective flow which is generated by the combined effects of nanoparticles and buoyancy forces. The Brownian motion and thermophoretic mechanisms along with Newtonian heating are also considered. Appropriately modified transformations are invoked to get a non-linear system of differential equations. The resulting problems are solved using a numerical scheme. Velocity field, thermal and solute distributions and motile micro-organism density are discussed graphically. Wall-drag (skin-friction) coefficient, Nusselt, Sherwood and motile micro-organisms are numerically examined for various parameters. The outcomes indicate that for a larger Rayleigh number, the bio-convection restricts the upward movement of nanoparticles that are involved in nanofluid for the given buoyancy effect. Furthermore, larger buoyancy is instigated which certainly opposes the fluid flow and affects the concentration. For a larger values of fluid parameter, the fluid viscosity faces a decline and certainly less restriction is faced by the fluid. In both assisting and opposing cases, we notice a certain rise in fluid motion. Thermal layer receives enhancement for larger values of Brownian diffusion parameter. The random motion for stronger Brownian impact suddenly raises which improves the heat convection and consequently thermal distribution receives enhancement. Thermal distribution receives enhancement for a larger Lewis number whereas the decline is noticed in concentration distribution. The larger Rayleigh number results in a strong buoyancy force that effectively increases the fluid temperature. This also increases the concentration difference, thus more nanoparticles transport between surface and micro-organisms. Furthermore, for larger (Nb), the thermal state of fluid receives enhancement while a decline in motile density is observed. Numerical results show that mass flux is an enhancing function of both the (Le) and (Nb).
Predicting Hidden Danger Quantity in Coal Mines Based on Gray Neural Network
Authors: Zhao Hongze , He Qiao , Wei Zhao , Zhou Lilin
Published: April 2020

The hidden danger is the direct cause of coal mine accidents, and the number of hidden dangers in a certain area not only reflects the current safety situation, but also determines the development trend of safety production in this area to a large extent. By analyzing the formation and development law of the hidden dangers and hidden danger accident-induced mechanism in coal mines, it is concluded that there are some objective laws in the process of occurrence, development, weakening, and even stabilization of hidden dangers in a certain area. The development of the number of hidden dangers for a coal mine generally presents the law of similar normal distribution curve, with a certain degree of partial symmetry. Many years of hidden danger elimination in coal mines will accumulate large-scale hidden danger data. In this paper, by using the average value of hidden danger quantity in consecutive months to weaken the oscillation of hidden danger quantity sequence, and combining with gray model (1,1) and the neural network of extreme learning machine, and employing big data of hidden dangers available, a hidden danger quantity prediction model based on the gray neural network was established, and the experimental analysis and verification carried out. The results show that the model can achieve good prediction effect on the number of hidden dangers in a coal mine, which not only reflects the complex gray system behavior of hidden dangers of a coal mine, but also can predict dynamically. The safety management efficiency and emergency capacity of the coal mine enterprise will be greatly improved.
ZDC: A Zone Data Compression Method for Solid State Drive Based Flash Memory
Authors: Ye Xin , Zhai Zhengjun , Li Xiaochang
Published: April 2020

Solid-state drive (SSD) with flash memory as the storage medium are being widely used in various data storage systems. SSD data compression means that data is compressed before it is written to Not-And (NAND) Flash. Data compression can reduce the amount of data written in NAND Flash and improve the performance and reliability of SSDs. At present, the main problem facing data compression of SSD is how to improve the efficiency of data compression and decompression. In order to improve the performance of data compression and decompression, this study proposes a method of SSD data deduplication based on zone division. First, this study divides the storage space of the SSD into zones and divides them into one hot zone and multiple cold zones according to the different erasing frequency. Second, the data in each zone is divided into hot data and cold data according to the number of erasures. At the same time, the address mapping table in the hot zone is loaded into the cache. Finally, when there is a write or read request, the SSD will selectively compress or decompress the data according to the type of different zones. Through simulation tests, the correctness and effectiveness of this study are verified. The research results show that the data compression rate of this research result can reach 70–95%. Compared with SSD without data compression, write amplification is reduced by 5 to 30%, and write latency is reduced by 5 to 25%. The research results have certain reference value for improving the performance and reliability of SSD.
Investigation of Heavy-Ion Induced Single-Event Transient in 28 nm Bulk Inverter Chain
Authors: Wu Anquan , Liang Bin , Chi Yaqing , Wu Zhenyu
Published: April 2020

The reliability of integrated circuits under advanced process nodes is facing more severe challenges. Single-event transients (SET) are an important cause of soft errors in space applications. The SET caused by heavy ions in the 28 nm bulk silicon inverter chains was studied. A test chip with good symmetry layout design was fabricated based on the 28 nm process, and the chip was struck by using 5 kinds of heavy ions with different linear energy transfer (LET) values on heavy-ion accelerator. The research results show that in advanced technology, smaller sensitive volume makes SET cross-section measured at 28 nm smaller than 65 nm by an order of magnitude, the lower critical charge required to generate SET will increase the reliability threat of low-energy ions to the circuit, and high-energy ions are more likely to cause single-event multiple transient (SEMT), which cannot be ignored in practical circuits. The transients pulse width data can be used as a reference for SET modeling in complex circuits.
Novel Fractional Operators with Three Orders and Power-Law, Exponential Decay and Mittag–Leffler Memories Involving the Truncated M-Derivative
Authors: Solís-Pérez Jesús Emmanuel , Gómez-Aguilar José Francisco
Published: April 2020

In this research, novel M-truncated fractional derivatives with three orders have been proposed. These operators involve truncated Mittag–Leffler function to generalize the Khalil conformable derivative as well as the M-derivative. The new operators proposed are the convolution of truncated M-derivative with a power law, exponential decay and the complete Mittag–Leffler function. Numerical schemes based on Lagrange interpolation to predict chaotic behaviors of Rucklidge, Shimizu–Morioka and a hybrid strange attractors were considered. Additionally, numerical analysis based on 0–1 test and sensitive dependence on initial conditions were carried out to verify and show the existence of chaos in the chaotic attractor. These results showed that these novel operators involving three orders, two for the truncated M-derivative and one for the fractional term, depict complex chaotic behaviors.
Recognition of Holoscopic 3D Video Hand Gesture Using Convolutional Neural Networks
Authors: Alnaim Norah , Abbod Maysam , Swash Rafiq
Published: April 2020

The convolutional neural network (CNN) algorithm is one of the efficient techniques to recognize hand gestures. In human–computer interaction, a human gesture is a non-verbal communication mode, as users communicate with a computer via input devices. In this article, 3D micro hand gesture recognition disparity experiments are proposed using CNN. This study includes twelve 3D micro hand motions recorded for three different subjects. The system is validated by an experiment that is implemented on twenty different subjects of different ages. The results are analysed and evaluated based on execution time, training, testing, sensitivity, specificity, positive and negative predictive value, and likelihood. The CNN training results show an accuracy as high as 100%, which present superior performance in all factors. On the other hand, the validation results average about 99% accuracy. The CNN algorithm has proven to be the most accurate classification tool for micro gesture recognition.
Theoretical Modeling of Oral Glucose Tolerance Tests Guides the Interpretation of the Impact of Perinatal Cadmium Exposure on the Offspring’s Glucose Homeostasis
Authors: Rocca Alexandre , Fanchon Eric , Moulis Jean-Marc
Published: April 2020

Oral glucose tolerance tests, in which the concentration of glucose is monitored in the circulation over 2 h after ingesting a bolus, probe diabetic or pre-diabetic conditions. The resulting glucose curves inform about glucose turnover, insulin production and sensitivity, and other parameters. However, extracting the relevant parameters from a single complex curve is not straightforward. We propose a simple modeling method recapitulating the most salient features of the role of insulin-secreting pancreatic β -cells and insulin sensitive tissues. This method implements four ordinary differential equations with ten parameters describing the time-dependence of glucose concentration, its removal rate, and the circulating and stored insulin concentrations. From the initial parameter set adjusted to a reference condition, fitting is done by minimizing a weighted least-square residual. In doing so, the sensitivity of β -cells to glucose was identified as the most likely impacted function at weaning for the progeny of rats that were lightly exposed to cadmium in the perigestational period. Later in life, after young rats received non-contaminated carbohydrate enriched food, differences are more subtle, but modeling agrees with long-lasting perturbation of glucose homeostasis.
Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes
Authors: Parry Rhys , Naccache Fanny , Ndiaye El Hadji , Fall Gamou , Castelli Ilaria , Lühken Renke , Medlock Jolyon , Cull Benjamin , Hesson Jenny C. , Montarsi Fabrizio , Failloux Anna-Bella , Kohl Alain , Schnettler Esther , Diallo Mawlouth , Asgari Sassan , Dietrich Isabelle , Becker Stefanie C.
Published: April 2020

The inland floodwater mosquito Aedes vexans (Meigen, 1830) is a competent vector of numerous arthropod-borne viruses such as Rift Valley fever virus (Phenuiviridae) and Zika virus (Flaviviridae). Aedes vexans spp. have widespread Afrotropical distribution and are common European cosmopolitan mosquitoes. We examined the virome of Ae. vexans arabiensis samples from Barkédji village, Senegal, with small RNA sequencing, bioinformatic analysis, and RT-PCR screening. We identified a novel 9494 nt iflavirus (Picornaviridae) designated here as Aedes vexans iflavirus (AvIFV). Annotation of the AvIFV genome reveals a 2782 amino acid polyprotein with iflavirus protein domain architecture and typical iflavirus 5’ internal ribosomal entry site and 3’ poly-A tail. Aedes vexans iflavirus is most closely related to a partial virus sequence from Venturia canescens (a parasitoid wasp) with 56.77% pairwise amino acid identity. Analysis of AvIFV-derived small RNAs suggests that AvIFV is targeted by the exogenous RNA interference pathway but not the PIWI-interacting RNA response, as ~60% of AvIFV reads corresponded to 21 nt Dicer-2 virus-derived small RNAs and the 24–29 nt AvIFV read population did not exhibit a “ping-pong” signature. The RT-PCR screens of archival and current (circa 2011–2020) Ae. vexans arabiensis laboratory samples and wild-caught mosquitoes from Barkédji suggest that AvIFV is ubiquitous in these mosquitoes. Further, we screened wild-caught European Ae. vexans samples from Germany, the United Kingdom, Italy, and Sweden, all of which tested negative for AvIFV RNA. This report provides insight into the diversity of commensal Aedes viruses and the host RNAi response towards iflaviruses.
“French Phage Network” Annual Conference—Fifth Meeting Report
Authors: Laumay Floriane , Chaïb Amel , Linares Romain , Breyton Cécile
Published: April 2020

Attracting about 100 participants, the fifth edition of our French Phages.fr annual conference was once more a success. This year’s conference took place at the Institute for Structural Biology on the European Electron and Photon Campus in Grenoble, 8–9 October 2019. Similar to previous years, our meeting gathered scientists mainly working in France, from academic labs and hospitals as well as from industry. We also had the pleasure of welcoming attendees from different European countries and even beyond. The conference was divided into four sessions: Ecology and Evolution, Phage Therapy and Biotechnology, Structure and Assembly and Phage–Host Interaction, each opened by a keynote lecture. The talks, selected from abstracts, gave the opportunity for young scientists (especially students and post-docs) to present their project and results in a friendly atmosphere. Poster sessions also favoured interactions and discussions between young researchers and more senior scientists. Here, we provide a summary of the topics developed during the conference.
Health Care Professionals’ Perspectives on Life-Course Immunization: A Qualitative Survey from a European Conference
Authors: Philip Roy K. , Di Pasquale Alberta
Published: April 2020

Today, fewer children die each year from vaccine-preventable diseases than older adults. Health systems need new immunization strategies to tackle the burden of vaccine-preventable disease in an aging society. A life-course immunization (LCI) approach—which entails vaccination throughout an individual’s lifespan—enables adults to age with reduced risk to disease, thereby enabling healthy, active and productive aging. We conducted an audience response system (ARS)-based survey to investigate HCP perspectives on LCI in an opportunistic sample of 222 health care professionals (HCPs) from around the world who attended a European infectious diseases conference. Survey results show that LCI is a priority for HCPs (77.4%–88.6%), with most of them stating the need to frame it as a part of a healthy lifestyle (91.0%–100.0%). Insufficient LCI recommendations by vaccine providers (12.9%–33.3%) and governments (15.2%–41.9%) and insufficient targeted budget allocation (6.1%–21.7%) were indicated as the main barriers to implement LCI, ahead of vaccine hesitancy (9.7%–15.2%). HCPs were willing to make LCI a gateway to healthy aging but need support to work together with other stakeholders involved in the vaccination journey. This could be a step towards equitable health care for all of society.
In Ovo Delivered Toll-Like Receptor 7 Ligand, Resiquimod Enhances Host Responses against Infectious Bronchitis Corona Virus (IBV) Infection
Authors: De Silva Senapathi Upasama , Aboelkhair Mohamed , Puro Kekungu , Ali Mariam , Amarasinghe Aruna , Abdul-Cader M. Sarjoon , Van Marle Guido , Czub Markus , Abdul-Careem Mohamed Faizal
Published: April 2020

Toll-like receptor (TLR) 7 ligand, resiquimod, has been studied as an adjuvant and antiviral agent against several pathogens in chicken. Yet, the effectiveness of resiquimod against infectious bronchitis virus (IBV) infection has not been evaluated. In this study, we investigated the effectiveness of resiquimod delivered pre-hatch (in ovo) against IBV infection post-hatch identifying key mechanisms involved in resiquimod driven immune activation. First, we found an upregulation of interleukin (IL)-1β and interferon (IFN)-γ mRNA levels and considerable expansions of macrophage and cluster of differentiation (CD) 8α+ T cell populations in lungs of chicken as early as day one post-hatch, following pre-hatch delivery of resiquimod. Second, we observed that resiquimod was able to act as an adjuvant when resiquimod was delivered pre-hatch along with an inactivated IBV vaccine. Finally, when the resiquimod pretreated one-day-old chickens were infected with IBV, reduction in viral shedding via oral and fecal routes was observed at 3 days post- infection. Overall, this study shows that the pre-hatch delivered resiquimod increases cell-mediated immune responses in lungs with an advantage of reduction in IBV shedding.
Source Water Apportionment of a River Network: Comparing Field Isotopes to Hydrodynamically Modeled Tracers
Authors: Tomkovic Lily A. , Gross Edward S. , Nakamoto Bobby , Fogel Marilyn L. , Jeffres Carson
Published: April 2020

Tributary source water provenance is a primary control on water quality and ecological characteristics in branching tidal river systems. Source water provenance can be estimated both from field observations of chemical characteristics of water and from numerical modeling approaches. This paper highlights the strengths and shortcomings of two methods. One method uses stable isotope compositions of oxygen and hydrogen from water in field-collected samples to build a mixing model. The second method uses a calibrated hydrodynamic model with numerical tracers released from upstream reaches to estimate source-water fraction throughout the model domain. Both methods were applied to our study area in the eastern Sacramento–San Joaquin Delta, a freshwater tidal system which is dominated by fluvial processes during the flood season. In this paper, we show that both methods produce similar source water fraction values, implying the usefulness of both despite their shortcomings, and fortifying the use of hydrodynamic tracers to model transport in a natural system.
The Hydrochemistry and Recent Sediment Geochemistry of Small Lakes of Murmansk, Arctic Zone of Russia
Authors: Slukovskii Zakhar , Dauvalter Vladimir , Guzeva Alina , Denisov Dmitry , Cherepanov Alexander , Siroezhko Evgeny
Published: April 2020

This paper presents the first study of five small lakes located in the city of Murmansk. Field work was carried out during 2018–2019. Water samples were collected using a bathometer, while the sediments were sampled using an Ekman grab and Limnos gravity corer. It was found that the water of the studied lakes in Murmansk belong to the sodium group of the chloride class and to the calcium group of the hydrocarbonate class. Compared to the background level, elevated pH, concentrations of the main cations of alkali and alkaline-earth metals, N compounds, total dissolved solids, and heavy metals were found in the lakes, which indicate exposure to anthropogenic impacts. The sediments of the lakes, composed of organomineral and mineral silts, also have an elevated content of heavy metals compared to the background. The most significant excessive concentrations were found for V, Ni, Sb, Pb, Co, Cr, and W. Based on the calculated pollution load index and geoaccumulation index of the sediments, the studied water bodies in Murmansk can be classified as lakes with heavy and extremely heavy pollution levels. The primary pollution sources are emissions from the Murmansk thermal power plant, coal port, road and, rail transport.
Trajetória de vida
Authors: FALCAO Kary Jean , Costa Angelo Brandelli , Neves Strey Marlene
Published: April 2020

O estudo, de natureza qualitativa, busca analisar a trajetória de vida de uma professora que atuou na década de 1980 no ensino fundamental na rede pública de Porto Velho, Rondônia, e o seu processo de construção de identidade transexual. Desenvolveu-se um estudo biográfico a partir da compreensão da psicologia social para contribuir na constituição e afirmação de identidade de gênero de professores e os impactos que potencializam um ambiente escolar com espaços de igualdade e humanização. A abordagem metodológica do estudo foi baseada em entrevistas filmadas tendo como colaboradores: membros da família, professores, amigos de trabalho e ex-alunos que fizeram parte da história da professora. O estudo biográfico oportunizou novas reflexões quanto o papel da escola e da prática docente.
A literatura para infância em e-book
Authors: Santana Debus Eliane , Lopes da Rosa Bárbara
Published: April 2020

Este texto objetiva averiguar como a Literatura Infantil se adequa aos avanços tecnológicos digitais e de acessibilidade, em particular os Livros Eletrônicos, também conhecidos como e-books. Para isso, realizou-se o mapeamento de e-books em seis sites. A partir desse levantamento, foram escolhidos dois sites para análise. Constatou-se que as tecnologias digitais possibilitam o surgimento de um leitor diverso do material impresso, nasce, portanto, o leitor contemporâneo, que não somente lê, mas ajuda a construir o texto-desfecho da obra. Porém, os e-books que foram encontrados nesta investigação ainda não se utilizam muito dos recursos tecnológicos disponíveis em sociedade, mudando basicamente o suporte de leitura e, em alguns, a movimentação de uma animação da história e a narração não se dá de forma linear e não permite escolhas por parte dos leitores na continuidade ou mudança da história.
Análise do impacto do Turnaround Time de reparáveis na disponibilidade da frota do Projeto C-95M
Authors: Figueiredo Mariane Camargos , Scanfone Leila , Mota Daniel Coelho
Published: April 2020

Este trabalho analisa a relação entre Turnaroud Time (TAT) médio de reparáveis e o impacto na disponibilidade da frota do Projeto C-95M, utilizando dados históricos da Força Aérea Brasileira (FAB). Tal abordagem é de suma importância para o trabalho desenvolvido na organização, pois os resultados podem impactar na necessidade do aumento de giro disponível, o que acarreta maior quantidade orçamentária e/ou menor quantidade de aeronaves prontas para voo. O objetivo deste trabalho é levantar o impacto do TAT na disponibilidade das aeronaves e identificar parâmetros para o TAT que possibilitem a melhoria no processo de aquisições ou contratação de serviços. Este intento é conseguido através de revisão bibliográfica a respeito do assunto, levantamento de dados da realidade da Força Aérea Brasileira e utilização do OPUS 10 na etapa de modelagem para verificação dos resultados. A análise demonstrou que o impacto do TAT na disponibilidade é maior quando a quantidade de giro é menor. Para o acervo do Projeto C-95M da FAB, foi possível verificar que o impacto é acentuado quando o TAT ultrapassa 120 dias, aproximadamente. Dessa forma, foi possível identificar que esse parâmetro é vantajoso na utilização em novas aquisições ou contratação de serviços.
Exploration history and place names of northern East Greenland
Authors: Higgins Anthony K.
Published: April 2020

The first recorded landing by Europeans on the coast of northern East Greenland (north of 69°N) was that of William Scoresby Jr., a British whaler, in 1822. This volume includes a chronological summary of the pioneer 19th century exploration voyages made by British, Danish, Norwegian, Swedish, French and German expeditions – all of whom reported that the region had previously been occupied by the Inuit or Eskimo; also included are brief outlines of the increasing number of government and privately sponsored expeditions throughout the 20th century, whose objectives included cartography, geology, zoology, botany, trapping and the ascent of the highest mountain summits.

In 1934 the Place Name Committee for Greenland was established, the tasks of which included a review of all place names hitherto recorded on published maps of Greenland, their formal adoption in danicised form, and the approval or rejection of new name proposals. In northern East Greenland, by far the largest numbers of new place names were those proposed by scientists associated with Lauge Koch's geological expeditions that lasted from 1926 until 1958. This volume records the location and origin of more than 3000 officially approved place names as well as about 2650 unapproved names.

The author's interest in the exploration history and place names of northern East Greenland started in 1968, when the Geological Survey of Greenland initiated a major five-year geological mapping programme in the Scoresby Sund region. Systematic compilation of names began about 1970, initially with the names given by William Scoresby Jr., and subsequently broadened in scope to include the names proposed by all expeditions to northern East Greenland. The author has participated in 16 summer mapping expeditions with the Survey to northern East Greenland. Publication of this volume represents the culmination of a lifetime working in the Arctic.
Lithostratigraphy of the Upper Oligocene – Miocene succession of Denmark
Authors: Skovbjerg Rasmussen Erik , Dybkjær Karen , Piasecki Stefan
Published: April 2020

This paper presents a revised lithostratigraphic scheme for the uppermost Upper Oligocene – Miocene succession of Denmark. The marine Oligocene Brejning Clay Member is upgraded to formation status and includes the Sydklint Member and the Øksenrade Member (new). The shallow marine and deltaic deposits of mainly Early Miocene age are included in the Ribe Group (new) while the fully marine Middle and Upper Miocene clay-rich deposits are referred to the Måde Group (new). The Ribe Group is subdivided into 6 formations: the Vejle Fjord Formation is revised and includes the Skansebakke Member, the Billund Formation (new) includes the Addit and Hvidbjerg Members (new), the Klintinghoved Formation is redefined formally and includes the Koldingfjord Member (new), the Bastrup Formation (new) includes the Resen Member (new), the Vandel Member is a new member in the Arnum Formation (revised), the Odderup Formation is redefined and includes the Stauning Member (new) and the coalbearing Fasterholt Member. The Måde Group is subdivided into the Hodde, Ørnhøj (new), Gram and Marbæk (new) Formations. Subdivision of the Upper Oligocene – Miocene succession into two groups, the Ribe and Måde Groups, is compatible with the North Sea lithostratigraphic framework where they correlate with the upper part of the Hordaland Group and the Nordland Group, respectively.

The revised lithostratigraphic framework correlated in three dimensions provides rigorous constraints on the palaeogeographic interpretation of the Late Oligocene – Miocene period. Three major deltaic units (Billund, Bastrup and Odderup Formations) prograded from the north and north-east into the North Sea Basin during the Early – early Middle Miocene. Delta progradation was punctuated by deposition of marine clay and silt associated with minor transgressive events (Vejle Fjord, Klintinghoved and Arnum Formations). During the Middle–Late Miocene, marine depositional conditions dominated (Hodde, Ørnhøj and Gram Formations). A fourth and final progadational event (Marbæk Formation) commenced in the latest Tortonian heralding the emergence of present-day Denmark (including the North Sea sector).
Upper Cretaceous chalk facies and depositional history recorded in the Mona-1 core, Mona Ridge, Danish North Sea
Authors: Anderskouv Kresten , Surlyk Finn
Published: April 2020

The 331 m long core from the Mona-1 well in the Danish North Sea spans almost the entire Upper Cretaceous Chalk Group but only about 10% of Late Cretaceous time is represented. The succession comprises 14 facies representing pelagic deposition, turbidity flow, and mass-transport processes, including mudflow, debris flow, and slumping. Pelagic deposits vary mainly in terms of the concentration of siliciclastic material, the trace-fossil assemblage, and the presence or absence of primary sedimentary structures. Pelagic sedimentation was probably punctuated by the deposition of thin turbidites, and the resultant deposits were thoroughly bioturbated if deposited during normal oxygenation at the sea floor. Periodic benthic dysoxia resulted in the preservation of primary structures, as represented by laminated chalk which consists of thin pelagic laminae alternating with thin turbidites. In addition to the thin turbidites in the laminated chalk, four different turbidite facies are interpreted as representing high- to low-energy flows. Clast-supported chalk conglomerates have previously not been differentiated from other turbidites, but are here interpreted to be directly related to the down-slope evolution of debris flows. Debris flows are represented by matrix-supported conglomerates, which form one of the most common facies in the succession. High-concentration, gravity-driven suspension flows passed into dilute visco-plastic flows during the final stages of deposition and resulted in the deposition of structureless chalks. Limited shear deformation produced distinct quasi-facies from which the precursor facies can be deduced, whereas intense or continued shear deformation produced a shear-banded quasi-facies from which the precursor facies cannot be deduced in all cases. A series of major slump packages (14–18 in total) are interpreted, forming over 40% of the succession; debrites appear to be the most common precursor facies involved in slumping. The vertical succession of facies records an earliest Cenomanian facies shift from dominantly siliciclastic to chalk deposition. The Cenomanian – late Campanian period was dominated by erosion or sediment by-pass with minor associated mass-transport deposits preserved. Basin filling by pelagites and turbidites prevailed in the late Campanian, whereas Maastrichtian pelagic deposition was interrupted by increasingly frequent and voluminous mass-transport events.
The norite belt in the Mesoarchaean Maniitsoq structure, southern West Greenland: conduit-type Ni-Cu mineralisation in impact-triggered, mantle-derived intrusions?
Authors: Garde Adam A. , Pattison John , Kokfelt Thomas F. , McDonald Iain , Secher Karsten
Published: April 2020

With the recent discovery of the giant, deeply eroded, 3 Ga Maniitsoq impact structure in southern West Greenland (Garde 2010), an enigmatic, c. 75 by 15 km large, curvilinear belt of undeformed norite intrusions with Ni-Cu mineralisation was re-interpreted as representing crustally contaminated melts derived from the mantle in the wake of the impact (Fig. 1; Garde et al. 2012). The norite belt (Nielsen 1976; Secher 1983) was discovered in the early 1960s by the mining and exploration company Kryolitselskabet Øresund A/S, and more than one hundred shallow exploration holes were drilled by the company in the period 1965–1971. The mineralisation has subsequently been investigated by Cominco Ltd., Falconbridge Ltd. and NunaMinerals A/S. In 2011, the re-interpretation of the norite belt, and recent availability of improved airborne geophysical exploration tools, prompted the Canadian company North American Nickel Inc. (NAN) to resume exploration.
A new seamless digital 1:500 000 scale geological map of Greenland
Authors: Pedersen Mikael , Weng Willy L. , Keulen Nynke , Kokfelt Thomas F.
Published: April 2020

For around 40 years, the Geological Survey of Greenland (GGU) and later the Geological Survey of Denmark and Greenland (GEUS) conducted systematic geological overview mapping of Greenland, leading to the production of 14 printed map sheets on a scale of 1:500 000 which covers the entire country (Fig. 1). The mapping was completed in 1999 and the map sheets were published between 1971 and 2004. Revised 2nd editions of two of the sheets have been published (Table 1). As a result of the development of the Internet, the publi-cation platform for geological maps has increasingly moved from traditional paper sheets to digital publications for most geological surveys worldwide. This tendency has changed the requirements to the underlying production, storage and publication platforms for map data. For the same reason, it has over the past decade been a strategy of GEUS to bring the 1:500 000 geological maps of Greenland together as a seamless, digital product with a homogeneous legend. This has been further motivated by the increasing number of Geo-graphic Information System (GIS) and web applications to which such a map would provide a valuable background, as well as to many international projects such as OneGeology. The harmonisation of the geological maps was carried out by a project team at GEUS comprising both geological and GIS expertise. The first version of the new seamless map was finished in 2012 and will be released in various web applications in 2013.
Pengembangan Modul dan Video Pembelajaran Matematika Persiapan Ujian Nasional pada Materi Dimensi Tiga
Authors: Tamu Suhardiman Darson , Hulukati Evi , Djakaria Ismail
Published: April 2020

Artikel ini membahas tentang pengembangan modul dan video pembelajaran matematika pada materi Dimensi Tiga. Pengembangan dengan menggunakan model ASSURE, yaitu Analyzer learner, State standards and objectives, Select strategies, Technology media and materials, Utilize technology, Require learner participation, dan Evaluate and revise. Kualitas modul dan video dalam pengembangan ini dilihat dari dua aspek yaitu validitas dan kepraktisan. Instrumen penelitian yang digunakan adalah lembar validasi modul dan video, lembar angket respon peserta didik dan lembar angket respon guru. Hasil penelitian mengungkapkan penilaian dari validator terhadap modul dan video memperoleh kriteria valid. Selanjutnya, penerapan modul dan video dalam pembelajaran mendapatkan respon positif dari guru dengan rata-rata persentase 86.08% dan respon positif dari peserta didik dengan rata-rata persentase 77.56%. Nilai rata-rata respon guru dan peserta didik ini menunjukkan kategori sangat baik, sehingga modul dan video dapat dikatakan memenuhi kriteria kepraktisan. Hal ini menunjukkan bahwa modul dan video pembelajaran memenuhi aspek valid dan praktis sehingga layak digunakan dalam pembelajaran.
AN INVESTIGATION INTO HOW LESSON STUDY PRACTICE RESHAPES AN EFL TEACHER’S BELIEFS REGARDING THE QUALITIES OF EFFECTIVE LANGUAGE TEACHERS
Authors: KARABUGA Ferhan , ILİN Gülden
Published: April 2020

The present
study aims to provide insights into how
teachers’ beliefs about the qualities of effective teachers are shaped when
they take part in Lesson Study practice as a teacher-led, collaborative
professional development activity. The study adopted qualitative
research methodology and utilized from the qualitative data collection means
including repertory grids (i.e. pre- and post) and follow-up interviews to
achieve the research aim. The results reveal that the EFL teacher in the study context steps in the process
of change since he is observed to cite constructs related to teacher-student
relationships and add  new constructs
related to professional development as a result of experiencing Lesson Study
model with his colleaques.
Ocorrência de plantas tóxicas para ruminantes e equídeos no Semiárido Paraibano
Authors: Carolino Larissa Raquel Carvalho , Duarte Amélia Lizziane Leite
Published: April 2020

Uma planta é considerada tóxica quando é capaz de causar uma determinada doença no animal ou até mesmo sua morte quando consumida em condições naturais, ocasionando prejuízos aos produtores de forma direta e indireta. As intoxicações por plantas em ruminantes e equinos representam grande perda econômica anual por morte de animais, o que justifica um maior investimento na divulgação de medidas preventivas, além da realização de pesquisas para melhor conhecimento das intoxicações. No semiárido Paraibano, há presença de espécies conhecidas pela sua toxicidade, entretanto na microrregião de Sousa- PB não há relatos sobre as principais espécies que podem acometer os animais de produção. Foram realizadas visitas em doze propriedades de criação de ruminantes e equinos na região semiárida Paraibana, Municípios de Marizópolis, Nazarezinho, Sousa e São João do Rio do Peixe, seguido da aplicação de questionário junto aos proprietários e obtenção de informações sobre o conhecimento e reconhecimento de plantas tóxicas, casos e/ou surtos de intoxicações. As plantas tóxicas relatadas e identificadas com mais frequência entre os produtores/criadores foram: Tinguí (Amorimia septentrionalis) 92%, Pereiro (Aspidosperma pyrifolium) 83%, Jurema preta (Mimosa tenuiflora) 92%, Algaroba (Prosopis juliflora) 90%, Maniçoba (Manihot glaziovii) 90%, Salsa brava (Ipomoea asarifolia) 100% e Sorgo (Sorghum spp) 60%. Em uma das fazendas, ocorreu morte de doze ovinos, sendo os jovens mais afetados, o proprietário relatou que os animais aparentemente saudáveis amanheciam mortos (morte súbita), e que totalizavam um a dois animais mortos por dia, ocorrendo em dias alternados. Quase sempre a causa da morte era associada, pelo produtor, à picada de cobra. Foram recomendadas práticas de prevenção para evitar maiores prejuízos econômicos decorrentes destas intoxicações, como impedir o acesso dos animais às plantas, cercar a área com os animais ou com as plantas ou eliminar as plantas tóxicas da área de pastejo dos animais.
BIOATIVOS EM FRUTOS DE JUAZEIRO (Ziziphus joazeiro Mart.)
Authors: Silva Jéssica Leite da , Nascimento Ana Marinho do , Gadelha Tatiana Marinho , Silva Osvaldo Soares da , Costa Franciscleudo Bezerra da
Published: April 2020

INTRODUÇÃO: O Ziziphus joazeiro Mart. é uma espécie endêmica da Caatinga, apresenta porte médio, bastante resistente a seca, permanecendo verde durante todo o período de estiagem. Seu caule, folhas e frutos apresentam diversas aplicações, desde a medicina popular, indústria de cosméticos, alimentação animal e humana. Os frutos de juazeiro são saborosos, doces e ricos em vitamina C, no entanto, são necessários estudos no sentido de aprofundar o conhecimento das propriedades do fruto, como por exemplo, os componentes bioativos presentes, identificando suas potencialidades e possíveis aplicações na alimentação humana e industrialização. OBJETIVOS: Objetivou-se avaliar os componentes bioativos (compostos fenólicos, flavonoides, antocianinas e ácido ascórbico) de frutos de juazeiro colhidos no estádio maduro. MATERIAIS E MÉTODOS: Os frutos de juazeiro maduros foram colhidos de plantas localizadas na Universidade Federal de Campina Grande, campus Pombal/PB. Após a colheita, seleção, classificação, remoção de sujidades e retirada do pedúnculo, os frutos foram despolpados manualmente com auxílio de facas e a polpa processada em processador de suco doméstico com adição de água na proporção 1:1 (massa:volume). A quantificação dos compostos fenólicos foi realizada por espectrofotometria utilizando o método de Folin-Ciocalteou; os flavonoides e antocianinas foram extraídos em solução de etanol:HCl e quantificados por leitura em espectrofotômetro; o ácido ascórbico foi determinado por titulação em solução de Tillmans. RESULTADOS E DISCUSSÃO: Os frutos de juazeiro obtiveram elevada concentração de componentes bioativos, em especial de compostos fenólicos (455,15 mg 100g-1), aspecto de grande importância pois essas substâncias possuem atividade antioxidante, que atuam inibindo a ação de radicais livres. Os flavonoides e as antocianinas se apresentaram em menor concentração, 6,76 mg 100g-1 e 0,23 mg 100g-1, respectivamente, induzindo que os compostos fenólicos do fruto de juazeiro é do tipo não flavonoide. Estimou-se concentração de ácido ascórbico de 11,89 mg 100g-1, quantidade relevante e de grande importância, pois, o ácido ascórbico é empregado como índice de qualidade dos alimentos, além de possuir atividade antioxidante. CONCLUSÃO: O fruto de juazeiro tem concentração elevada de compostos fenólicos e quantidade relevante de ácido ascórbico, podendo assim ser considerado fornecedor de compostos bioativos, além de nutrir, podem promover benefícios a saúde do indivíduo, como a prevenção de doenças.
COMPOSIÇÃO FÍSICO-QUÍMICA DE SEMENTES DE MORINGA ORIUNDAS DE DOIS ESTADOS DO NORDESTE BRASILEIRO
Authors: Silva Semirames Do Nascimento , De Matos Joana D’arc Paz , De Moraes Maria Suiane , Santos Newton Carlos , Gomes Josivanda Palmeira
Published: April 2020

O potencial de uso de Plantas Alimentícias Não Convencionais (PANCs) no Brasil ainda é desconhecido e exige a realização de mais estudos, e pode se tornar ferramenta importante no estabelecimento de sistemas de produção em bases sustentáveis. A Moringa oleifera é um exemplo de PANCs, a mesma é originária da Índia e pertencente à família Moringaceae. Nas últimas décadas, as suas sementes têm sido objeto de estudos em diferentes áreas. A moringa possui propriedades nutricionais importantes. O conteúdo em proteínas, vitaminas e minerais são significativos e é considerado um dos melhores vegetais perenes. Teve-se como objetivo comparar a composição físico-química das sementes de moringa oriundas de dois estados do Nordeste brasileiro. As sementes utilizadas na pesquisa foram coletadas em dois estados, a saber: Bahia e Paraíba. No Laboratório de Processamento e Armazenamento de Produtos Agrícolas, da Universidade Federal de Campina Grande as sementes foram selecionadas e descascadas manualmente. Realizaram-se as análises físico-químicas de teor de água, atividade de água, acidez total titulável, pH, cinzas, proteínas, carboidratos e lipídios. A atividade de água das sementes pode ser classificada como intermediária, assim como baixa acidez, atendendo às exigências previstas pela legislação brasileira, que determina um mínimo de 0,8% de acidez em ácido cítrico. O pH foi classificado como pouco ácido, a quantidade de cinzas foi superior ao da literatura, ambas as sementes contém alto teor proteico, os parâmetros lipídios e carboidratos apresentaram-se diferentes, sendo as sementes da Paraíba as que resultaram em maiores teores de lipídios e a menor quantidade de carboidratos. O conhecimento das características físico-químicas das sementes de moringa permite a sua aplicação em diversos produtos alimentícios, e a verificação do seu comportamento frente ao cultivo em diferentes estados é, certamente, um aspecto importante.
PROPRIEDADES FÍSICAS DE FEIJÃO VERDE EM FUNÇÃO DE DIFERENTES TEMPERATURAS DE SECAGEM
Authors: Silva Semirames Do Nascimento , Barroso Antônio Jackson Ribeiro , De Matos Joana D’arc Paz , Da Silva Polyana Barbosa , Gomes Josivanda Palmeira
Published: April 2020

A colheita é uma das etapas da cadeia produtiva dos produtos agrícolas, depois de colhidos, os grãos são submetidos à pré-processamentos para posterior processamento. A secagem é uma alternativa importante, pois, além de possibilitar uma armazenagem de forma segura, também pode promover alterações nas características físicas por meio da redução do teor de água e mudanças qualitativas indesejáveis, tais como a descoloração, trinca ou quebra dos grãos. Objetivou-se com a pesquisa avaliar as propriedades físicas de grãos de feijão verde em função de diferentes temperaturas de secagem. O experimento foi realizado no Laboratório de Processamento e Armazenamento de Produtos Agrícolas, da Universidade Federal de Campina Grande, Paraíba. O delineamento experimental adotado foi o inteiramente casualizado com quatro temperaturas de secagem (40; 60; 70 e 80 °C) em três repetições. As propriedades físicas determinadas foram: teor de água (%), atividade de água, massa específica real (g/cm3), massa específica aparente (g/cm3), porosidade (%), volume (cm3), massa do grão (g), peso de mil grãos (g), ângulo de repouso (°) e esfericidade (%). Os grãos apresentaram redução no teor e atividade de água em função do aumento da temperatura de secagem, com valores que variaram de 51,29 a 1,97% e 0,98 a 0,22, respectivamente. Não se observou diferença estatística significativa para as densidades real, aparente e porosidade, no entanto houve diferença significativa para os parâmetros volume, massa do grão, peso de mil grãos, ângulo de repouso e esfericidade. O decréscimo do ângulo de repouso com a elevação da temperatura de secagem sugere que com maior temperatura, os grãos diminuem a rugosidade de sua superfície, impondo, assim, uma menor resistência ao deslizamento de uma partícula da massa de produto contra a outra, reduzindo o ângulo de repouso do grão. A redução dos valores das propriedades físicas estudadas com o processo de secagem vem sendo observada para a maioria dos produtos agrícolas, podendo inferir desta forma que há uma contração volumétrica nos grãos em função do processo de dessorção, que consiste em perda de água. Desta forma, a temperatura de secagem influenciou significativamente nas propriedades físicas de grãos de feijão verde.
ÍNDICE VISUAL DE SUPERAÇÃO DE DORMÊNCIA DE ALHO À TEMPERATURA AMBIENTE
Authors: Alcântara Charlene Maria , Silva Franciélia De Oliveira , Nascimento Ana Marinho do , Gadelha Tatiana Marinho , Costa Franciscleudo Bezerra da
Published: April 2020

INTRODUÇÃO: A informação das condições fisiológicas do alho é importante para manter sua vida útil. A germinação é o fator que causa redução do valor comercial, tendo em vista que gera transformações metabólicas e crescimento da radícula. Esses problemas ocorrem devido à ausência de conhecimento durante o manejo e beneficiamento dessa hortaliça. OBJETIVOS: Objetivou-se avaliar o índice visual de superação de dormência do alho mantido a temperatura ambiente. MATERIAIS E MÉTODOS: O experimento foi realizado no Laboratório de Química, Bioquímica e Análise de Alimentos, do Centro de Ciências e Tecnologia Agroalimentar, da Universidade Federal de Campina Grande, Campus de Pombal. Foram utilizados alho provenientes da cidade do Crato no Ceará. Para a obtenção das amostras os bulbilhos foram separados e acondicionados em recipientes plásticos, rotuladas, colocados sob temperatura ambiente por 9 dias, sendo a análise realizada a cada três dias. O delineamento experimental utilizado foi o inteiramente casualizado com dois fatores (3x2): sendo 3 tempos de análise (3, 6 e 9 dias) e 2 formas de armazenamento do alho (com casca e sem casca). RESULTADOS E DISCUSSÃO: Não houve interação entre os resultados avaliados. Entretanto, foi identificado diferença significativa entre os tempos de armazenamento. Os valores de superação de dormência obtidos no alho com casca variaram de 47 a 52%, respectivamente. Já no alho sem casca a superação de dormência foi de 45 a 69%. Os bulbilhos de alho com casca apresentaram maior resistência ao estado de dormência e retardou o processo de germinação. Esse fator está relacionado ao envoltório que contorna o bulbilho, indicando que ele atuou contra a temperatura e umidade relativa. Durante o armazenamento verificou-se que o alho sem casca apresentou maior percentual de quebra de dormência, isto ocorreu porque ele ficou exposto aos fatores intrínsecos do ambiente, ou seja, o alho sem casca obteve maior absorção da umidade, fazendo com que o processo de germinação fosse estimulado.  CONCLUSÃO: O alho mantido a temperatura ambiente apresentou maior índice de superação de dormência após 9 dias de armazenado. Essas condições são indesejáveis no aspecto comercial, uma vez que ocorreu modificações na estrutura física que reduziu a vida útil do alimento a partir do sexto dia de análise.