bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and fabrication of miniaturized tri-band frequency selective surface with polarization-independent and angularly stable response
Authors: Sampath Sayi Soundariya , Sivasamy Ramprabhu 
Published: April 2021

Abstract
A single-layer miniaturized tri-band frequency selective surface (FSS) for bandstop filtering applications has been proposed in this work. The metallic layer with four-branched meandered pattern connected in the center is engraved on a dielectric FR-4 substrate. The three stopbands operating at 2.6, 5.6, and 7.1 GHz provides −10 dB bandwidth of 437, 447, and 552 MHz respectively. The size of the unit cell is 0.067 λ∘ × 0.067 λ∘, where λ∘ is the wavelength of the first resonance frequency. As a figure of merit, the symmetric FSS structure provides the advantage of polarization independence. The proposed compact FSS structure exhibits a stable angular response up to 60° in TE and TM mode. Moreover, measurements obtained from the fabricated prototype are compared with the simulated results and are found to be in close agreement.
A review of some nonexplosive alternative methods to conventional rock blasting
Authors: Al-Bakri Ali , Hefni Mohammed 
Published: April 2021

Abstract
The conventional blasting rock excavation method is the main means of rock breakage because of its high productivity, and it is relatively inexpensive compared to other methods. However, it raises safety concerns and can negatively impact the environment. The major disturbances that may be induced by this method include flyrock, gas emissions, and vibrations. This review discusses some nonexplosive rock breakage methods, particularly the hydraulic splitter and expansive chemical agents, that can be employed instead of the conventional blasting method and analyzes their potential effectiveness in rock breakage. Hydraulic splitting machines and expansive chemical agents were studied in the context of the literature. This review showed that hard rock breaking can be executed effectively and safely using alternative methods, which have a wide range of advantages, including safe operation, ease of use, and environmental friendliness, over conventional explosive methods. Moreover, as modern nonexplosive methods, hydraulic splitting machines and expansive chemical agents can generate pressure of up to 43 and 30–44 MPa to induce stresses in rocks, respectively. Owing to safety and environmental restrictions on conventional blasting, the application scope of the modern methods can be increased in the future.
The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark
Authors: Oliveira Ricardo Jorge , Santos Bruna , Mota Maria J. , Pereira Susana R. , Branco Pedro C. , Pinto Paula C. R. 
Published: April 2021

Abstract
Lignocellulosic biomass represents a suitable feedstock for production of biofuels and bioproducts. Its chemical composition depends on many aspects (e.g. plant source, pre-processing) and it has impact on productivity of industrial bioprocesses. Numerous methodologies can be applied for biomass characterisation, with acid hydrolysis being a particularly relevant step. This study intended to assess the most suitable procedures for acid hydrolysis, taking Eucalyptus globulus bark as a case study. For that purpose, variation of temperature (90–120 °C) was evaluated over time (0–5 h), through monosaccharides and oligosaccharides contents and degradation. For glucose, the optimal conditions were 100 °C for 2.5 h, reaching a content of 48.6 wt.%. For xylose, the highest content (15.2 wt.%) was achieved at 90 °C for 2 h, or 120 °C for 0.5 h. Maximum concentrations of mannose and galactose (1.0 and 1.7 wt.%, respectively) were achieved at 90 and 100 °C (2–3.5 h) or at 120 °C (0.5–1 h). These results revealed that different hydrolysis conditions should be applied for different sugars. Using this approach, total sugar quantification in eucalyptus bark was increased by 4.3%, which would represent a 5% increase in the ethanol volume produced, considering a hypothetical bioethanol production yield. This reflects the importance of feedstock characterization on determination of economic viability of industrial processes.
Recovery of lactose from aqueous solution by application of ultrasound through millichannel
Authors: Sharma Daxa , Murthy Zagabathuni Venkata Panchakshari , Patel Sanjaykumar Rameshbhai 
Published: April 2021

Abstract
Instead of direct disposal of whey, extraction of valuable products from it may reduce the environmental pollution. In the present study, the effect of ultrasound irradiation through millichannel on recovery of lactose was investigated. The ultrasonic baths of varying amplitude (20–40%) and frequency (25–35 kHz), two different configurations of millichannel i.e., coil and serpentine, were used to know their individual and combined effect on the lactose yield. Box-Behnken design was employed to examine the interactive effect of different operating conditions. The recovery of lactose was enhanced approximately by 5–53% and induction time was reduced by 1.79–1.85 times in comparison to the conventional process. The size of the lactose crystals was reduced from 139.5 to 42.486 μm at 40% amplitude and 49.879 μm at 35 kHz frequency. Optimized condition showed 63% yield of lactose at 3.6 supersaturation, 35 kHz frequency, and 45 min of sonication time.
Chronic hypertension in pregnancy: synthesis of influential guidelines
Authors: Tsakiridis Ioannis , Giouleka Sonia , Arvanitaki Alexandra , Mamopoulos Apostolos , Giannakoulas George , Papazisis Georgios , Athanasiadis Apostolos , Dagklis Themistoklis 
Published: April 2021

Abstract
Chronic hypertension in pregnancy accounts for a substantial proportion of maternal morbidity and mortality and is associated with adverse perinatal outcomes, most of which can be mitigated by appropriate surveillance and management protocols. The aim of this study was to review and compare recommendations of published guidelines on this condition. Thus, a descriptive review of influential guidelines from the National Institute for Health and Care Excellence, the Society of Obstetric Medicine of Australia and New Zealand, the International Society of Hypertension, the International Society for the Study of Hypertension in Pregnancy, the European Society of Cardiology, the International Federation of Gynecology and Obstetrics, the Society of Obstetricians and Gynaecologists of Canada and the American College of Obstetricians and Gynecologists on chronic hypertension in pregnancy was conducted. All guidelines agree on the definition and medical management, the need for more frequent antenatal care and fetal surveillance and the re-evaluation at 6–8 weeks postpartum. There is also a consensus that the administration of low-dose aspirin is required to prevent preeclampsia, although the optimal dosage remains controversial. No universal agreement has been spotted regarding optimal treatment blood pressure (BP) targets, need for treating mild-to-moderate hypertension and postnatal BP measurements. Additionally, while the necessity of antenatal corticosteroids and magnesium sulfate for preterm delivery is universally recommended, the appropriate timing of delivery is not clearly outlined. Hence, there is a need to adopt consistent practice protocols to optimally manage these pregnancies; i.e. timely detect and treat any potential complications and subsequently reduce the associated morbidity and mortality.
Interactional means of teaming up: enacting the features of contemporary working life in a theater performance
Authors: Nissi Riikka , Stevanovic Melisa 
Published: April 2021

Abstract
The article examines how the aspects of the social world are enacted in a theater play. The data come from a videotaped performance of a professional theater, portraying a story about a workplace organization going through a personnel training program. The aim of the study is to show how the core theme of the play – the teaming up of the personnel – is constructed in the live performance through a range of interactional means. By focusing on four core episodes of the play, the study on the one hand points out to the multiple changes taking place both within and between the different episodes of the play. On the other hand, the episodes of collective action involving the semiotic resources of singing and dancing are shown to represent the ideals of teamwork in distinct ways. The study contributes to the understanding of socially and politically oriented theater as a distinct, pre-rehearsed social setting and the means and practices that it deploys when enacting the aspects of the contemporary societal issues.
Creep-Fatigue Behavior of a Newly Developed Ultra-Supercritical Steam Turbine Grade Nickel-Based Superalloy, HAYNES 282
Authors: Mukherjee Shreya , Barat Kaustav , Tarafder Soumitra , Sivaprasad S. , Kar Sujoy Kumar 
Published: April 2021

Abstract
Most engineering components used in gas/steam turbines are exposed to a range of complex loading conditions resulting from startup and shutdown procedures. These loading conditions involve superimposition of time-dependent creep on cyclic fatigue and can be simulated by properly designed high-temperature creep-fatigue tests. Creep-fatigue interaction is a function of duration and position of dwell in the loading waveform, and the material microstructure. The objective of this work is to investigate the creep-fatigue interaction response of a newly developed γ′-strengthened wrought nickel-based superalloy (HAYNES 282), which has a potential application in advanced ultra-supercritical steam turbines. Creep-fatigue tests are conducted at 760°C with strain dwell either at tensile peak or compressive peak or at both tensile and compressive peak positions for different dwell times of 100 and 1,000 s. The test results are analyzed with respect to evolutions of peak stress, stress amplitude, stress relaxation, hysteresis loop, inelastic strain energy density, and degree of softening. Degree of softening is found to increase with dwell position at tensile, compressive, and both peaks in that order. Tests with dwell at both tensile and compressive peak positions are found to be the most damaging, showing the least life. Between tensile dwell and compressive dwell tests, interestingly, those with compressive dwell show a significantly reduced life. Increasing dwell time aggravates the damaging effect manifold. The mechanism of fracture at the end of life is illustrated with fractographic characterization.
Calcineurin Activity Is Increased in Charcot-Marie-Tooth 1B Demyelinating Neuropathy
Authors: Sidoli Mariapaola , Reed Chelsey B. , Scapin Cristina , Paez Pablo , Cavener Douglas R. , Kaufman Randal J. , D'Antonio Maurizio , Feltri M. Laura , Wrabetz Lawrence 
Published: April 2021

Schwann cells produce a considerable amount of lipids and proteins to form myelin in the PNS. For this reason, the quality control of myelin proteins is crucial to ensure proper myelin synthesis. Deletion of serine 63 from P0 (P0S63del) protein in myelin forming Schwann cells causes Charcot-Marie-Tooth type 1B neuropathy in humans and mice. Misfolded P0S63del accumulates in the ER of Schwann cells where it elicits the unfolded protein response (UPR). PERK is the UPR transducer that attenuates global translation and reduces ER stress by phosphorylating the translation initiation factor eIF2alpha. Paradoxically,Perkablation in P0S63del Schwann cells (S63del/PerkSCKO) reduced the level of P-eIF2alpha, leaving UPR markers upregulated, yet unexpectedly improved S63del myelin defectsin vivo. We therefore investigated the hypothesis that PERK may interfere with signals outside of the UPR and specifically with calcineurin/NFATc4 pro-myelinating pathway. Using mouse genetics including females and males in our experimental setting, we show that PERK and calcineurin interact in P0S63del nerves and that calcineurin activity and NFATc4 nuclear localization are increased in S63del Schwann cells, without altering EGR2/KROX20 expression. Moreover, genetic manipulation of the calcineurin subunits appears to be either protective or toxic in S63del in a context-dependent manner, suggesting that Schwann cells are highly sensitive to alterations of calcineurin activity.SIGNIFICANCE STATEMENTOur work shows a novel activity and function for calcineurin in Schwann cells in the context of ER stress. Schwann cells expressing the S63del mutation in P0 protein induce the unfolded protein response and upregulate calcineurin activity. Calcineurin interacts with the ER stress transducer PERK, but the relationship between the UPR and calcineurin in Schwann cells is unclear. Here we propose a protective role for calcineurin in S63del neuropathy, although Schwann cells appear to be very sensitive to its regulation. The paper uncovers a new important role for calcineurin in a demyelinating diseases.
Microbial repellence properties of engineered spider silk coatings prevent biofilm formation of opportunistic bacterial strains
Authors: Sommer Christoph , Bargel Hendrik , Raßmann Nadine , Scheibel Thomas 
Published: April 2021

Abstract
Bacterial infections are well recognised to be one of the most important current public health problems. Inhibiting adhesion of microbes on biomaterials is one approach for preventing inflammation. Coatings made of recombinant spider silk proteins based on the consensus sequence of Araneus diadematus dragline silk fibroin 4 have previously shown microbe-repellent properties. Concerning silicone implants, it has been further shown that spider silk coatings are effective in lowering the risk of capsular fibrosis. Here, microbial repellence tests using four opportunistic infection-related strains revealed additional insights into the microbe-repellent properties of spider silk-coated implants, exemplarily shown for silicone surfaces.

Graphic Abstract
Projeto comunidade de leitores: letramento e arte
Authors: Oliveira Ilton Luiz Fonseca de 
Published: April 2021

<p>O presente artigo tem o objetivo de divulgar as ações do Projeto de extensão comunidade de leitores desenvolvido no IFPB Campus Catolé do Rocha e na escola Municipal Luzia Maia no ano de 2019. Este projeto teve como objetivo despertar o prazer da leitura, o potencial cognitivo e criativo dos alunos da cidade de Catolé do Rocha – PB.</p>
Spiders (Araneae) Collected as Prey by the Mud-Dauber WaspsSceliphron caementariumandChalybion californicum(Hymenoptera: Sphecidae) in Southeastern Nebraska
Authors: Corey Tyler B. , Agpawa Earl , Hebets Eileen A. 
Published: April 2021

AbstractPredator diets represent a potential interaction between local prey availability, prey antipredator defenses, and predator foraging behavior. Female spider-specialist mud-dauber wasps (Hymenoptera: Sphecidae) collect spiders and provision them intact, but paralyzed, to their developing larvae, providing a unique means of quantifying the diversity and abundance of prey that they capture. Mud-dauber wasps are hypothesized to be a major source of selection on antipredator defenses in web-building spiders, and the spiny and thickened abdomens of female spiny orb-weaving spiders (Araneae: Araneidae) are hypothesized to function as antiwasp defenses. We inventoried spider prey from nests of the mud-dauber wasps Sceliphron caementarium (Drury) and Chalybion californicum (Saussure), and surveyed for spider fauna in areas surrounding nest collection sites, to specifically investigate if the spiny orb-weaver Micrathena gracilis (Walckenaer) was collected as prey by these wasps. We collected nests from six sites in southeastern Nebraska from two regions that we classify based on habitat—a forest corridor and agricultural land. We collected 761 intact spider prey from 87 nests and identified them to the family level. None of these spiders were M. gracilis. Micrathena gracilis were rare in faunal surveys on agricultural land and, surprisingly, absent in forest corridor surveys. Mud-dauber wasps were more common; we collected more spiders on agricultural land than in the forest corridor. We propose that in agricultural landscapes, the lack of certain spiders in mud-dauber wasp nests is driven by habitat use differences between predators and prey rather than physical antipredator defenses.
Consumer-Ready Insect Hotels: An Assessment of Arthropod Visitation and Nesting Success
Authors: Harris B.A. , Poole E.M. , Braman S.K. , Pennisi S.V. 
Published: April 2021

Abstract
Insect nesting boxes and hotels have the potential to provide shelter and overwintering sites for beneficial insect communities such as pollinating bees, wasps, earwigs, and other predatory arthropods. This study evaluated beneficial arthropod visitation to consumer-ready, commercially available nesting boxes over a 2-yr period. Insect hotels were placed on mature river birch (Betula nigra L.) and crape myrtle (Lagerstroemia indica L.) in garden plots established with floral resources for pollinators and other beneficial insects. Paper and thread-waisted wasps, soldier flies, predatory ants, and spiders were observed visiting the boxes. Boxes located in garden plot treatments (with floral resources) had the greatest numbers and diversity of pollinator and beneficial insect taxa compared to control plot treatments (naturalized areas away from floral resources) in 2016. Insect hotels placed on B. nigra had a higher number of thread-waisted wasps in 2016 and spiders and total beneficial insects in 2017. Higher numbers of predatory ants and total beneficial arthropods were found in boxes placed on L. indica in 2016. During the study, bamboo stems and drilled tunnels in the insect boxes were evaluated for arthropod inhabitance. Largest counts of occupied stems and tunnels were observed in boxes placed in proximity to floral resources and on L. indica trees.
Rapid Bioassay for Detection of Acaricide Resistance in Tetranychus urticae (Acari: Tetranychidae)
Authors: Martínez-Huasanche Fernando , Rodríguez-Maciel J. Concepción , Santillán-Galicia Ma. Teresa , Lagunes-Tejeda Ángel , Rodríguez-Martínez Douglas , Toledo-Hernandez Ricardo , Guzmán-Franco Ariel W. , Silva-Aguayo Gonzalo 
Published: April 2021

Abstract
Early detection of resistance to acaricides in Tetranychus urticae Koch (Acari: Tetranychidae) populations is important for the implementation of efficient control methods. Current methodologies to detect resistance in the laboratory require exposure to acaricides for 24 to 72 h. Our objective was to design a reliable method faster than the current one. We modified the existing Insecticide Resistance Action Committee method to obtain results in less than 4 h. Experiments were conducted using a susceptible laboratory population of T. urticae and a field population from raspberry Rubus idaeus L., obtained in Tlazazalca, Michoacán state, Mexico. Susceptibility to the acaricides abamectin, acequinocyl, fenpropatrin, propylene glycol monolaurate, and bifenazate was evaluated. Reliable results were obtained in less than 30 min for all acaricides except bifenazate, for which results were obtained in 3.5 h. For abamectin, relative resistance (RR) of the field population compared with the susceptible colony achieved values of 13.99× (RR50) and 6.5× (RR95). For bifenazate, RR50 and RR95 values were 14.9× and 12.9×, respectively. For all other acaricides, the RR values were &lt;10×.
Medication Errors and Reducing Interventions: A Mixed Study in a Teaching Hospital
Authors: Gray Serajaddin , Effatpanah Mohammad , Salehi Sara , Anvari Savojbalaghi Siamand , Momeni Leila , Abedi Gilavandani Roghayeh , Abbasi Chaleshtari Alireza 
Published: April 2021

Background: Given the special importance of preventing from medication, the present study aimed to investigate the determining Causes of Medication Errors (CMEs) and their Priorities for reducing interventions in a hospital.
Methods: The present mixed, sequential and cross-sectional study was conducted in a teaching hospital (2016). For data collection, Fishbone Diagrams, interviews, note taking and checklists were used, and qualitative data were analyzed though the thematic approach. Moreover, the Maxqda Software v.14.0, Excel, Edraw Max v.9.0 were employed for data analysis and reporting.
Results: Seventy-five CMEs were classified under two main themes (human and non-human) and four sub-themes (personal, network, organizational, and meta-organizational). Weakness of professionalism and low experience as the personal causes; Actions of pharmacy colleagues, physicians and other nurses as the network causes; Management of nurses and unit specialty as the organizational causes and the quality of academic education, drug features and macro policies of medication as meta-organizational causes were classified. Six causes were given priority for reducing interventions.
Conclusion: In the short term, human factors should be considered with the aim of reducing medication errors. It is also recommended that teaching how to deal with nurses’ stress and psychological pressure (especially beginner nurse), resulting from critically ill patients and high workload, be paid special attention. Besides, it is suggested that professionalism be given priority to reduce personal neglects and to create safe environments for reporting personal neglects. In addition, more emphasis should be placed on the right route in the process of medication administration.
Dodatek kwartalny
Authors: Gądek Artur , Maciejewska Maja , Uryszek Katarzyna , Zimny Artur , Uryszek Tomasz , Witczak Radosław , Hajdys Dagmara , Ślebocka Magdalena , Tylman Aneta 
Published: April 2021

„Sytuacja gospodarcza w Polsce w pierwszych miesiącach 2016”
„Koniunktura w sektorze przedsiębiorstw niefinansowych”
„Koniunktura giełdowa”
„Zadłużenie publiczne w 2015 roku”
„Zmiany w świecie podatków w pierwszym kwartale 2016 r.”
„Formalno-prawne aspekty implikacji partnerstwa publiczno-prywatnego w Polsce (cz. I)”
„Cele rewitalizacji w oparciu o założenia dokumentu strategicznego jakim jest Krajowa Polityka Miejska”
Características en estrategias de aprendizaje en matemáticas por alumnos mexicanos de bachillerato
Authors: Butrón Zamora Prócoro Omar , Sánchez Ruiz José Gabriel 
Published: April 2021

Las estrategias de aprendizaje (cognitivas, metacognitivas y estrategias relacionadas con el uso de recursos) están estrechamente vinculadas con el rendimiento académico del alumno posibilitando mejorar el aprendizaje. Las estrategias de aprendizaje se han considerado herramientas fundamentales en los procesos de enseñanza-aprendizaje en la totalidad de las áreas del conocimiento, entre ellas en matemáticas. El objetivo del presente estudio es detectar las características en el empleo de estrategias de aprendizaje en matemáticas en alumnos de bachillerato y posibles diferencias en función del curso académico y del sexo. Se aplicó el cuestionario LIST (Estrategias de aprendizaje en la universidad) a 154 estudiantes: 91 mujeres (59,1%) y 63 varones (40,9%). Se encontró una confiabilidad muy aceptable del instrumento (α=0,94). Por un lado el grupo de alumnos del segundo semestre tiene tendencia a recurrir más a las estrategias evaluadas en comparación con los demás grupos. Por otro lado, las estudiantes tienen tendencia a gestionar mejor los saberes matemáticos, a tener un ambiente de aprendizaje adecuado y a la búsqueda de información en diferentes fuentes ante dificultades, en mayor frecuencia que los varones.