bluuebunny/crossref_metadata_2025 huggingface dataset:
The EXOTIME project: signals in the O–C diagrams of the rapidly pulsating subdwarfs DW Lyn, V1636 Ori, QQ Vir, and V541 Hya
Authors: Mackebrandt F. , Schuh S. , Silvotti R. , Kim S.-L. , Kilkenny D. , Green E. M. , Lutz R. , Nagel T. , Provencal J. L. , Otani T. , Oswalt T. D. , Benatti S. , Lanteri L. , Bonanno A. , Frasca A. , Janulis R. , Paparó M. , Molnár L. , Claudi R. , Østensen R. H.
Published: April 2020

Aims. We aim to investigate variations in the arrival time of coherent stellar pulsations due to the light-travel time effect to test for the presence of sub-stellar companions. Those companions are the key to one possible formation scenario of apparently single sub-dwarf B stars.

Methods. We made use of an extensive set of ground-based observations of the four large amplitude p-mode pulsators DW Lyn, V1636 Ori, QQ Vir, and V541 Hya. Observations of the TESS space telescope are available on two of the targets. The timing method compares the phase of sinusoidal fits to the full multi-epoch light curves with phases from the fit of a number of subsets of the original time series.

Results. Observations of the TESS mission do not sample the pulsations well enough to be useful due to the (currently) fixed two-minute cadence. From the ground-based observations, we infer evolutionary parameters from the arrival times. The residual signals show many statistically significant periodic signals, but no clear evidence for changes in arrival time induced by sub-stellar companions. The signals can be explained partly by mode beating effects. We derive upper limits on companion masses set by the observational campaign.
A flare in the optical spotted in the changing-look Seyfert NGC 3516
Authors: Ilić D. , Oknyansky V. , Popović L. Č. , Tsygankov S. S. , Belinski A. A. , Tatarnikov A. M. , Dodin A. V. , Shatsky N. I. , Ikonnikova N. P. , Rakić N. , Kovačević A. , Marčeta-Mandić S. , Burlak M. A. , Mishin E. O. , Metlova N. V. , Potanin S. A. , Zheltoukhov S. G.
Published: April 2020

Context.We present observations from the short-term intensive optical campaign (from September 2019 to January 2020) of the changing-look Seyfert NGC 3516. This active galactic nucleus is known to have strong optical variability and has changed its type in the past. It has been in the low-activity state in the optical since 2013, with some rebrightening from the end of 2015 to the beginning of 2016, after which it remained dormant.

Aims.We aim to study the photometric and spectral variability of NGC 3516 from the new observations inU- andB-bands and examine the profiles of the optical broad emission lines in order to demonstrate that this object may be entering a new state of activity.

Methods.NGC 3516 has been monitored intensively for the past 4 months with an automated telescope inUandBfilters, enabling accurate photometry of 0.01 precision. Spectral observations were triggered when an increase in brightness was spotted. We support our analysis of past-episodes of violent variability with the UV and X-ray long-term light curves constructed from the archivalSwift/UVOT andSwift/XRT data.

Results.An increase of the photometric magnitude is seen in bothUandBfilters to a maximum amplitude of 0.25 mag and 0.11 mag, respectively. During the flare, we observe stronger forbidden high-ionization iron lines ([Fe VII] and [Fe X]) than reported before, as well as the complex broad Hαand Hβlines. This is especially seen in Hα, which appears to be double-peaked. It seems that a very broad component of ∼10 000 km s−1in width in the Balmer lines is appearing. The trends in the optical, UV, and X-ray light curves are similar, with the amplitudes of variability being significantly larger in the case of UV and X-ray bands.

Conclusions.The increase of the continuum emission, the variability of the coronal lines, and the very broad component in the Balmer lines may indicate that the AGN of NGC 3516 is finally leaving the low-activity state in which it has been for the last ∼3 years.
The role of Galactic H II regions in the formation of filaments
Authors: Zavagno A. , André Ph. , Schuller F. , Peretto N. , Shimajiri Y. , Arzoumanian D. , Csengeri T. , Figueira M. , Fuller G. A. , Könyves V. , Men’shchikov A. , Palmeirim P. , Roussel H. , Russeil D. , Schneider N. , Zhang S.
Published: April 2020

Context. Massive stars and their associated ionized (H II) regions could play a key role in the formation and evolution of filaments that host star formation. However, the properties of filaments that interact with H II regions are still poorly known.

Aims. To investigate the impact of H II regions on the formation of filaments, we imaged the Galactic H II region RCW 120 and its surroundings where active star formation takes place and where the role of ionization feedback on the star formation process has already been studied.

Methods. We used the large-format bolometer camera ArTéMiS on the APEX telescope and combined the high-resolution ArTéMiS data at 350 and 450 μm with Herschel-SPIRE/HOBYS data at 350 and 500 μm to ensure good sensitivity to a broad range of spatial scales. This allowed us to study the dense gas distribution around RCW 120 with a resolution of 8′′ or 0.05 pc at a distance of 1.34 kpc.

Results. Our study allows us to trace the median radial intensity profile of the dense shell of RCW 120. This profile is asymmetric, indicating a clear compression from the H II region on the inner part of the shell. The profile is observed to be similarly asymmetric on both lateral sides of the shell, indicating a homogeneous compression over the surface. On the contrary, the profile analysis of a radial filament associated with the shell, but located outside of it, reveals a symmetric profile, suggesting that the compression from the ionized region is limited to the dense shell. The mean intensity profile of the internal part of the shell is well fitted by a Plummer-like profile with a deconvolved Gaussian full width at half maximum of 0.09 pc, as observed for filaments in low-mass star-forming regions.

Conclusions. Using ArTéMiS data combined with Herschel-SPIRE data, we found evidence for compression from the inner part of the RCW 120 ionized region on the surrounding dense shell. This compression is accompanied with a significant (factor 5) increase of the local column density. This study suggests that compression exerted by H II regions may play a key role in the formation of filaments and may further act on their hosted star formation. ArTéMiS data also suggest that RCW 120 might be a 3D ring, rather than a spherical structure.
Lighthouses for biodiversity: prospects and challenges for zoological university museum in Indonesia
Authors: Cahyadi Ganjar , Rasyidi Rahman , Permadi Dikdik
Published: April 2020

University museums have been offering a great opportunity to study thematic collections. In zoology, it has been aiding the university biologist to keep safe extensive biodiversity collections from academic expeditions. When appropriately managed, this opens an opportunity for display, research, teaching, and outreach, especially for regions that may not have easy access to government-managed museums. However, Indonesian university museums have been positioned in a confusing situation in which university museums have limited opportunities to serve the main roles of museums. We use Museum Zoologi Sekolah Ilmu dan Teknologi Hayati, Institut Teknologi Bandung (MZSITH-ITB) as a study case. In this paper, we tried to explore the current roles of university museums being served and explore the prospects and challenges for university museums. Concurrent triangulation approach from desk evaluation, visitor analysis, and a semi-structured interview was conducted to see the current roles of MZSITH-ITB and prospects and challenges in the future. In conclusion, clear general procedures to standardize the collection management are urgently needed, so university museums can have a degree of independence to collect and study objects and collections. This can allow easier data integration and specimen sharing in which the museums can work together to shed some light on Indonesian biodiversity.
Comparison of gut microbiome from Sulawesi carrion and burying beetles (Coleoptera: Silphidae) through metagenomic analysis of 16S rRNA gene
Authors: Setiawan Ruby , Sumerta I Nyoman , Anita Syahfitri , Narakusumo Raden Pramesa , Setiawan Achmadi Anang
Published: April 2020

Carrion beetle (Coleoptera: Silphidae) is one of the scavengers which obtain nutrition from carcass decomposition which supported by the microbial symbionts through the mutual symbiosis. In this study, we characterized and compared the gut microbial community from the species of Nicrophorinae (Nicrophorus distinctus Grouvelle, 1885) and Silphinae (Necrophila renatae Portevin, 1920) from Dako Mountain, Central Sulawesi using 16S metagenomic approach. A total of 661 bacterial Operational Taxonomic Units (OTUs) at the species level were obtained from the guts of Ni. distinctus and Ne. renatae. Those numbers were predominated by Firmicutes and Proteobacteria, followed by Bacteriodetes in both species. Interestingly, a high number of Lactobacillales was observed in Ni. distinctus and lower number in Clostridiales and Cardiobacteriales compared to Ne. renatae, which showed higher abundance of those classes. Both of these insect species have nearly the same microbial diversity values, even though there some lower taxa levels were found different abundance. These results suggest that the patterns of the gut microbial structure depicted their roles in certain behavior and habitat on decomposing carcasses and could be correlated to the specific level of taxa roles in nutrient processing.
A molecular genetic approach for sex determination on helmeted hornbill (Rhinoplax vigil) casque: a forensic casework
Authors: Fitriana Yuli S. , Irham Mohammad , Sutrisno Hari , Abinawanto
Published: April 2020

Helmeted Hornbill(Rhinolax vigil)is the only hornbill that equipped with solid casque made from keratin for both males and females. The demand for casque in the black market was huge and resulted in IUCN status leaped up from vulnerable to critically endangered. We received a total of 68 confiscated helmeted hornbill casques. As part of the casework and the objectives of the study, we determined to reveal the sex status of those casques and the best methods to work with keratinous material. Molecular methods to determining sex in birds rely on the CHD gene located on male and female chromosomes ZZ and ZW, respectively. We optimized laboratory protocols for genetic sexing using three independent sets of primers P2/P8, 2550F/2718R, and CHD1F/CHD1R to amplify regions of the sexlinked CHD-Z and CHD-W genes. The CHD1F/CHD1R determined sex 80.88% of samples. The 2550F/2718R were quite successful, sexing 51.47% of samples. In contrast, the P2/P8 only identified the sex around 20.58% of samples. These results showed that CHD1F/CHD1R works the most effective for sexing the casques with 52.9% females, 27.9% males, and 19.1% unidentified. Therefore, the most accurate and suitable primers are CHD1F/CHD1R, 2550F/2718R, and P2/P8, respectively for keratinous samples.
New onshore/offshore evidence of the Messinian Erosion Surface from key areas: The Ibiza-Balearic Promontory and the Orosei-Eastern Sardinian margin
Authors: Maillard Agnès , Gaullier Virginie , Lézin Carine , Chanier Frank , Odonne Francis , Lofi Johanna
Published: April 2020

As the Messinian sea-level draw down associated with the Messinian Salinity Crisis is still questioned, we propose to show that the widely spread erosion surface affecting the Mediterranean margins is indeed linked to an exondation demonstrated from offshore and onshore data. Our study presents a comprehensive onshore to offshore correlation of the Messinian erosional surface. It is focused on small drainage systems or interfluve areas, outside of evaporite basins or incised canyons, where the Messinian erosion had not yet been studied previously: around Ibiza on the Balearic Promontory and around Orosei on the Eastern Sardinian margin, Tyrrhenian Basin, both areas where new offshore data were recently acquired. We show that the late Messinian erosion formed in subaerial settings, as testified by evidence of continentalization events, and attests for a regression phase that was correlated from the offshore continental slopes to the onshore paleo-platforms in both areas. Characteristics of this erosion in both study areas strengthen the scenario with at least one important low-stand sea-level for the Messinian Salinity Crisis with evaporites subbasins lying at different depths and possibly disconnected.
COVID-19: Pandemic surgery guidance
Authors: Brücher Björn L.D.M. , Nigri Giuseppe , Tinelli Andrea , Lapeña Jose Florencio F. , Espin-Basany Eloy , Macri Paolo , Matevossian Edouard , Ralon Sergio , Perkins Ray , Lück Rainer , Kube Rainer , da Costa Jose MC , Mintz Yoav , Tez Mesut , Allert Sixtus , Sökmen Selman , Spychala Arkadiusz , Zilberstein Bruno , Marusch Frank , Kermansaravi Mohammad , Kycler Witold , Vicente Diego , Scherer Michael A. , Rivkind Avraham , Elias Nelson , Wallner Grzegorz , Roviello Franco , Lara Santos Lúcio , Araujo Raimund J.C. , Szold Amir , Oleas Raúl , Slak Rupnik Marjan , Salber Jochen , Jamall Ijaz S. , Engel Alexander
Published: April 2020

Based on high quality surgery and scientific data, scientists and surgeons are committed to protecting patients as well as healthcare staff and hereby provide this Guidance to address the special issues circumstances related to the exponential spread of the Coronavirus disease 2019 (COVID-19) during this pandemic. As a basis, the authors used the British Intercollegiate General Surgery Guidance as well as recommendations from the USA, Asia, and Italy. The aim is to take responsibility and to provide guidance for surgery during the COVID-19 crisis in a simplified way addressing the practice of surgery, healthcare staff and patient safety and care. It is the responsibility of scientists and the surgical team to specify what is needed for the protection of patients and the affiliated healthcare team. During crises, such as the COVID-19 pandemic, the responsibility and duty to provide the necessary resources such as filters, Personal Protective Equipment (PPE) consisting of gloves, fluid resistant (Type IIR) surgical face masks (FRSM), filtering face pieces, class 3 (FFP3 masks), face shields and gowns (plastic ponchos), is typically left up to the hospital administration and government. Various scientists and clinicians from disparate specialties provided a Pandemic Surgery Guidance for surgical procedures by distinct surgical disciplines such as numerous cancer surgery disciplines, cardiothoracic surgery, ENT, eye, dermatology, emergency, endocrine surgery, general surgery, gynecology, neurosurgery, orthopedics, pediatric surgery, reconstructive and plastic surgery, surgical critical care, transplantation surgery, trauma surgery and urology, performing different surgeries, as well as laparoscopy, thoracoscopy and endoscopy. Any suggestions and corrections from colleagues will be very welcome as we are all involved and locked in a rapidly evolving process on increasing COVID-19 knowledge.
Thermal potential of a geothermal earth-to-air heat exchanger in six climatic conditions of México
Authors: Rodríguez-Vázquez M. , Xamán J. , Chávez Y. , Hernández-Pérez I. , Simá E.
Published: April 2020

In this paper, the thermal and ventilation potential of a geothermal Earth-to-Air Heat exchanger (EAHE) is studied for six weather in Mexico. The cities for the study and their climate were Villahermosa (hot-humid), Merida (hot-sub humid), Monterrey (dry), Juarez City (very dry), Zacualtipan-Hidalgo (warm-humid) and Mexico City (warm-sub-humid). The thermal behavior of the EAHE was modeled numerically for the corresponding warmest and coldest days of the year for each city and three values of Reynolds number. The 24 hrs simulations were carried out with an in-house code using data every 10 minutes. To get the results, 5,184 computational runs were necessary. The results showed that the EAHE has poor ventilation potential for climates with high levels of humidity such as Villahermosa, while for cities with low levels of humidity such as Chihuahua, the ventilation potential increases significantly, the rest of the cities fall in between. As for its application in Mexico, the results show that the EAHE is highly recommended for dry climates such as at the north of the country and not recommended for humid climates such as at the south and south-east of the country.
Development of a workflow for identification of nuclear genotyping markers for Cyclospora cayetanensis
Authors: Houghton Katelyn A. , Lomsadze Alexandre , Park Subin , Nascimento Fernanda S. , Barratt Joel , Arrowood Michael J. , VanRoey Erik , Talundzic Eldin , Borodovsky Mark , Qvarnstrom Yvonne
Published: April 2020

Cyclospora cayetanensis is an intestinal parasite responsible for the diarrheal illness, cyclosporiasis. Molecular genotyping, using targeted amplicon sequencing, provides a complementary tool for outbreak investigations, especially when epidemiological data are insufficient for linking cases and identifying clusters. The goal of this study was to identify candidate genotyping markers using a novel workflow for detection of segregating single nucleotide polymorphisms (SNPs) in C. cayetanensis genomes. Four whole C. cayetanensis genomes were compared using this workflow and four candidate markers were selected for evaluation of their genotyping utility by PCR and Sanger sequencing. These four markers covered 13 SNPs and resolved parasites from 57 stool specimens, differentiating C. cayetanensis into 19 new unique genotypes.
Aktivitäten der Sektion Gewebetransplantation und Biotechnologie der Deutschen Ophthalmologischen Gesellschaft: Leistungsbericht 2018
Authors: Reinshagen Helga , Maier Philip Christian , Böhringer Daniel
Published: April 2020

Die Sektion Gewebetransplantation und Biotechnologie legt ihren 9. Jahresbericht seit Bestehen vor. Zwar ist die Anzahl der eingeworbenen Hornhäute auf 10 840 angestiegen, von denen 7168 transplantiert wurden. Jedoch wurden weiterhin 1340 Transplantate aus dem Ausland importiert, und es warteten mehr als 3300 Patienten am Jahresende auf ein Hornhauttransplantat. Der Transplantatengpass ist somit noch nicht beseitigt.
Akute eosinophile Pneumonie (AEP) nach Shisha-Rauchen
Authors: Mager S. , Struss M. , Wollsching-Strobel M. , Karagiannidis C.
Published: April 2020

Ein 27-jähriger, zuvor körperlich gesunder Mann stellte sich mit akut einsetzendem thorakalem Druckgefühl, Dyspnoe, nichtproduktivem Husten und Fieber in einer zentralen Notaufnahme vor. Stunden vor Symptombeginn habe der Patient Wasserpfeife mit speziellem, in Deutschland nicht frei verkäuflichen Tabak mit der Geschmacksrichtung Minze geraucht. Bei progredienter Oxygenierungsstörung musste der Patient noch am Aufnahmetag intubiert werden. In der Computertomografie des Thorax stellten sich bilateral diffuse, infiltrative Veränderungen dar. Die bei Aufnahme durchgeführte bronchoalveoläre Lavage erbrachte den Nachweis einer ausgeprägten Eosinophilie von 69 %. Anhand der Anamnese, der Eosinophilenzahl sowie der computertomografischen Veränderungen erfolgte die Diagnosestellung einer mit Shisha-Rauchen assoziierten akuten eosinophilen Pneumonie (AEP). Nach einer Kortisonstoßtherapie und 9 Beatmungstagen konnte der Patient auf die Normalstation verlegt werden. In der ambulanten Nachsorge zeigten sich eine normale, altersentsprechende Lungenfunktion sowie ein vollständig regredienter radiologischer Befund.

Folgerung Obwohl die akute eosinophile Pneumonie (AEP) eine Rarität darstellt, ist sie eine zu berücksichtigende Differenzialdiagnose bei akut einsetzendem thorakalem Druckgefühl, Dyspnoe, nichtproduktivem Husten, Fieber und anamnestischem Wasserpfeifenkonsum. Mittels einer Kortisonstoßtherapie und Beatmung kann ein schweres ARDS bis zur vollständigen Ausheilung therapiert werden.
Neutralization of ion beam by electron injection: Excitation and propagation of electrostatic solitary waves
Authors: Lan C. , Kaganovich I. D.
Published: April 2020

The charge neutralization of an ion beam by electron injection is investigated using a two-dimensional electrostatic particle-in-cell code. The simulation results show that electrostatic solitary waves (ESWs) can be robustly generated in the neutralization process and last for a long time (for more than 30 μs) and therefore, ESWs can strongly affect the neutralization process. The ESWs propagate along the axis of the ion beam and reflect from the beam boundaries. The simulations clearly show that two ESWs can pass through each other with only small changes in amplitude. Partial exchange of trapped electrons in collisions of two ESWs is observed in the simulations and can explain interaction during collisions of two ESWs. Coalescence of two ESWs is also observed.
Dynamics of rare gas solids irradiated by electron beams
Authors: Candanedo J. , Caleman C. , Tîmneanu N. , Beckstein O. , Spence J. C. H.
Published: April 2020

The remarkable success of x-ray free-electron lasers and their ability to image biological macromolecules while outrunning secondary radiation damage due to photoelectrons, by using femtosecond pulses, raise the question of whether this can be done using pulsed high-energy electron beams. In this paper, we use excited state molecular dynamics simulations, with tabulated potentials, for rare gas solids to investigate the effect of radiation damage due to inelastic scattering (by plasmons, excitons, and heat) on the pair distribution function. We use electron energy loss spectra to characterize the electronic excitations responsible for radiation damage.
Effects of initial conditions and transport on ram pressure, Mach number, and uniformity for plasma liner formation and implosion
Authors: Schillo Kevin , Cassibry Jason
Published: April 2020

Plasma jet driven magneto-inertial fusion involves the merging of high Mach number plasma jets in a spherically converging geometry to form an imploding plasma liner. A three-dimensional smooth particle hydrodynamic simulation tool was used to study the number of plasma jets, jet density, and implosion velocity on the effects of formation and subsequent implosion of a plasma liner. The effects of different transport physics are presented. Thermal radiation and two-temperature modeling were found to have the most significant impact on the ram pressure. Solid angle averaged ram pressure and Mach number degradation were of particular interest in this study. Higher jet numbers were found to result in higher peak ram pressure. A spherical harmonic analysis was conducted for each case, providing a quantitative measure of the non-uniformity of the liner during the implosion process and how non-uniformities are affected by the different parameters explored in this study.
Control of Schottky barrier height in metal/β-Ga2O3 junctions by insertion of PdCoO2 layers
Authors: Harada T. , Tsukazaki A.
Published: April 2020

Control of Schottky barrier heights (SBHs) at metal/semiconductor interfaces is a critically important technique to design switching properties of semiconductor devices. In this study, we report the systematic variations of SBHs in metal/PdCoO2/β-Ga2O3 junctions with an increase in the thickness of the PdCoO2 insertion layer. The PdCoO2 insertion layer consists of ionic Pd+ and [CoO2]− sublattices alternatingly stacked along the normal of the Schottky interface. This polar layered structure of PdCoO2 spontaneously induces interface dipoles that increase the SBH in β-Ga2O3 devices. We fabricated Schottky junctions composed of metal/PdCoO2/β-Ga2O3 (−201) with the PdCoO2 thickness of 0–20 nm. With an increase in the PdCoO2 thickness, we observed a systematic shift of current density–voltage (J–V) characteristics to larger forward driving voltage. The shift of J–V characteristics indicates the enhancement of SBH by insertion of the PdCoO2 layer, which was confirmed by the capacitance measurement as the consistent shift of the built-in potential. These results demonstrate a controllable SBH in a wide range of 0.7–1.9 eV driven by a decisive contribution of the interface dipole effect. The Schottky junctions based on β-Ga2O3 with variable barrier heights could fit a wide range of applications, with the significant merits of optimizable switching properties.
Derived alleles of two axis proteins affect meiotic traits in autotetraploid
Arabidopsis arenosa
Authors: Morgan Chris , Zhang Huakun , Henry Clare E. , Franklin F. Chris H. , Bomblies Kirsten
Published: April 2020

Polyploidy, which results from whole genome duplication (WGD), has shaped the long-term evolution of eukaryotic genomes in all kingdoms. Polyploidy is also implicated in adaptation, domestication, and speciation. Yet when WGD newly occurs, the resulting neopolyploids face numerous challenges. A particularly pernicious problem is the segregation of multiple chromosome copies in meiosis. Evolution can overcome this challenge, likely through modification of chromosome pairing and recombination to prevent deleterious multivalent chromosome associations, but the molecular basis of this remains mysterious. We study mechanisms underlying evolutionary stabilization of polyploid meiosis using
Arabidopsis arenosa
, a relative of
A. thaliana
with natural diploid and meiotically stable autotetraploid populations. Here we investigate the effects of ancestral (diploid) versus derived (tetraploid) alleles of two genes,
ASY1
and
ASY3
, that were among several meiosis genes under selection in the tetraploid lineage. These genes encode interacting proteins critical for formation of meiotic chromosome axes, long linear multiprotein structures that form along sister chromatids in meiosis and are essential for recombination, chromosome segregation, and fertility. We show that derived alleles of both genes are associated with changes in meiosis, including reduced formation of multichromosome associations, reduced axis length, and a tendency to more rod-shaped bivalents in metaphase I. Thus, we conclude that ASY1 and ASY3 are components of a larger multigenic solution to polyploid meiosis in which individual genes have subtle effects. Our results are relevant for understanding polyploid evolution and more generally for understanding how meiotic traits can evolve when faced with challenges.
Cytokinesis and postabscission midbody remnants are regulated during mammalian brain development
Authors: McNeely Katrina C. , Dwyer Noelle D.
Published: April 2020

Significance

During prenatal brain development, neural stem cells must divide to produce billions of daughter cells. At early stages, they produce more stem cells. Later, they produce neurons. Errors in their divisions can result in abnormal brains. We address whether cytokinesis—cleavage furrowing and intercellular bridge severing (abscission)—occurs differently at different ages and in a small-brained mouse mutant of a kinesin motor protein gene. We developed a method to image neural stem cells undergoing cytokinesis in brain explants. We found that remnants of severed intercellular bridges are more likely to remain on daughter cells at earlier ages. In the kinesin gene mutant, bridge severing occurs faster. These findings suggest that precise regulations of cytokinesis are important during early brain development.
Do media systems matter?
Authors: Santana-Pereira José
Published: April 2020

This article reports a comparative analysis of the media’s political agenda setting capacity in 27 European media systems, aimed at testing the hypothesis that the magnitude of this phenomenon is moderated by factors such as development of the press markets, journalist professionalization, strength of public television or political pluralism. The empirical analysis relies on data collected by the expert survey European Media Systems Survey, the World Association of Newspapers, the European Audiovisual Observatory, and the research project Providing an Infrastructure for Research on Electoral Democracy in the European Union (PIREDEU). Results show that political agenda setting is perceived as more common in press markets in which newspapers work as means of horizontal communication (and are, as subsystem, politically imbalanced), but that journalist professionalization and strength of public broadcasting systems foster political agenda setting effects.
Political agenda-setting and -building in small consensus democracies
Authors: Sciarini Pascal , Tresch Anke , Vliegenthart Rens
Published: April 2020

This paper analyzes the mutual influence between media and political agendas in the Netherlands and Switzerland. While these two countries share a number of similarities, they also exhibit some important differences (e.g. the frequency of parliamentary meetings) that are likely to affect the patterns of influence. Time-series cross-section analyses of monthly data about issue attention in parliamentary questions and in media coverage for the period 1995–2003 (Switzerland) and 1995–2011 (Netherlands) provide partial support for our hypotheses. Agenda-setting and -building effects are overall stronger in Switzerland, which may be due to differences in the workings of national parliaments and varying degrees of mediatization. Moreover, our analyses reveal more pronounced differences between the coalition and opposition parties in Switzerland. Overall, this study demonstrates that it is important to consider smaller institutional differences when studying political agenda-setting and -building in a cross-national perspective.
Direct (dis)agreement verbs
Authors: Chung Siaw-Fong
Published: April 2020

“*I am not agree with you” is an incorrect use of agree frequently seen in the
writing of Taiwanese learners. Yet, not many studies have discussed the use of agree and
disagree in the literature. Many studies are concerned more about the politeness of (dis)agreement,
especially in detailing the relationship between speaker and hearer. We took a lexical semantic approach to compare the use of
agree and disagree in essays written by native English speakers and Taiwanese learners in
the ICNALE (International Corpus Network of Asian Learners of English). The essays were based on two topics
concerning societal issues collected in the corpus – (a) whether smoking should be completely banned in restaurants and (b)
whether college students should take a part-time job or not – the writers were asked to respond to each issue by agreeing or
disagreeing. Our results showed that when given clear instructions to agree or disagree, both native and learners tended to state
(dis)agreement in the very first sentence in their essays, but Taiwanese learners relied more on the uses of
agree and disagree more often than the native speakers did. The errors committed by learners
on the use of agree (not for disagree) were between 25–35% in our data. The results will bring
significant comparisons of the lexical semantics of related verbs (verbs of social interaction) in future studies.
Productivity and graduality in the Layered Structure of the Word
Authors: Novo Urraca Carmen , Ojanguren López Ana Elvira
Published: April 2020

This article deals with two theoretical aspects of lexical derivation, productivity and graduality. After a discussion of transparency and opaqueness in Old English word-formation, it focuses on lexical productivity and puts forward a typology of recursive phenomena. On the basis of this typology, the morphological template of the Layered Structure of the Word is revised. The main conclusion is that a more diachronically oriented analysis is likely to opt for a decompositional template, whereas a more synchronically directed study which seeks typological validity will probably favour the template with one functional slot. If the focus is on diachronic linguistics, a template based on minimal constituent analysis can guarantee a detailed description of the derivational steps of the word, including non-affixal derivation and semantically opaque affixes.
Simulation System of Lake Eutrophication Evolution based on RS & GIS Technology—a Case Study in Wuhan East Lake
Authors: Yang Xin , Huang Mutao , Bai Kaiyuan
Published: April 2020

Water is the source of life and monitoring water quality is very important. Traditional water quality monitoring often uses artificial methods, taking water samples on the spot, and then analysing them in the laboratory. This method is time-consuming and labour-intensive, and is affected by time, weather and human activities. It is not only inaccurate, but also difficult to multi-period. It is difficult to monitor large areas of water. This study proposes an intelligent water quality monitoring system— Simulation System of Lake Eutrophication Evolution based on RS & GIS Technology (SSLEE). Based on the .NET Framework, the system interface design is completed through Windows Form platform. C#, IDL and ArcGIS Engine are used to develop the whole system. The system can manage the measured data, remote sensing image data, preprocess the remote sensing image and retrieve the chlorophyll a concentration. Taking Wuhan East Lake as an example, the applicability of SSLEE system is demonstrated. Compared with the measured results, the error is small, indicating that the system is reliable in water quality monitoring of inland lakes.
Well Factory Practice in Bailu Lake Cluster Wells
Authors: Zhao Hongshan , Sun Jianxiang , Xu Yunlong
Published: April 2020

It is very difficult to economically develop Bailu Lake low permeability reservoir, facing severe anti-collision challenge, as well as trajectory controlling and cuttings carrying of high difficulty, beyond that the reservoir located in the scenic area, where the well site area was limited and the environmental protection requirements were very strict. On the basis of learning the foreign companies’ successful experience on cluster well factory, the authors analyzed the situation and difficulties of Bailu Lake well factory project initially, thus proposing Bailu Lake well factory overall optimized scheme, including slot drilling sequence and trajectory optimization. Through fast rig moving technique, PDC bit and motor optimization and high inhibitive and environment friendly CaCl2 mud system, the rig moving time was shorten by 2 days averagely and one run safe drilling in the second spud. Finally, the total 43 wells were successfully completed, and the average well drilling cycle was shorten by 15.49 days, which had achieved good effects.
Marine Reverse Osmosis Desalination Plant Operation-A Case Study
Authors: Fang Zhigang , Shu Haiping , Cao Jingyi , Li Liang , Yang Yueping
Published: April 2020

In the present work, a type of marine reverse osmosis desalination plant with 20t/d product operated at different condition (temperature, operation pressure, TDS) was studied. Within the different operation conditions, the TDS and flow rate of permeate change in relation to the operation pressure, temperature and TDS of seawater. The study shows that when the TDS of seawater is higher than 40000ppm or when the temperature of seawater is higher than 35°C, the TDS of permeate is higher than 500ppm and as such the permeate is not suitable for drinking. To satisfy the drinking water supply, two-level reverse osmosis or refrigerator for cooling the inlet water were suggested.
Quantifying Analysis of Hydrological Conditions Dynamic Alteration and its Multiple Influencing Factors
Authors: Leng Jiwei , Fu Yicheng , Zhao Jinyong
Published: April 2020

Hydrological condition is of great significance to river ecosystems. Alteration in hydrological conditions can directly or indirectly affect ecosystems, causing changes in river ecological health, species habitats, and water-sand relationships. In this paper, the Index of Hydrologic Alteration-Range of Variability Approach method (IHA-RVA) method was used to evaluate the alteration of hydrological condition in Yuanshui river from 1959 to 2010 under the combined action of climate change and human activities. We have reached the conclusion that the current hydrological condition alteration in the Yuanshui River Basin is moderately changing; Regardless of the water diversion, the contribution rates of natural runoff changes and cascade reservoir operations to hydrological change is 58% and 42% respectively, which were quantified by the multi-series contribution rate segmentation method. It can be seen that the natural runoff change was the leading cause of the change of the overall hydrological situation, and the operation of the cascade reservoir was an important cause of the hydrological situation change.
Research on Forest Health Industry Based on County Economy-Taking the Forest Health Industry in Antu County, Jilin Province as an Example
Authors: Gai Luofan , An Yonggang , Huo Pengfei
Published: April 2020

As an important practice of the “two mountains” theory, the forest health industry has become the new situation and new business form of China’s health industry [1]. However, due to the short development time, there are many problems and deficiencies in infrastructure, resource utilization, and industrial layout. This paper takes the forest health industry in Antu County, Jilin Province as an example, and discusses the important influence of county economy on industry, and discusses the forest health industry.
Information Entropy Embedded Back Propagation Neural Network Approach for Debris Flows Hazard Assessment
Authors: Yu Yan , Wang Jun
Published: April 2020

The purpose of the study is to propose a new method to assess debris flow hazard by embedding Shannon’s information entropy in back propagation neural network. The procedure was divided into two parts. One was to establish a mathematical model for debris-flow hazard assessment based on Shannon’s information entropy forming input and output data sets of back propagation neural network. The other was to establish a back propagation neural network technique for characterizing debris flow dynamic hazard. The proposed method was employed to assess debris flow hazard of Shenxi gully basin, Sichuan province, China. The result shows that the assessed result of proposed method is highly consistent with the result of field surveys. The proposed method can reflect the interaction, nonlinearity and dynamic process of background variable factors and can be used to debris flow hazard assessment, risk management and mitigation of debris flows.
Investigating the Dynamics of Rainfall and Temperature in Three Selected Districts in Ghana: A Quantile Autoregression (QAR) Model Perspective
Authors: Gbolonyo Kweku Patrick , Osabutey Wisdom , Li Lu , Yang Xiaorong
Published: April 2020

In this paper, the quantile autoregressive (QAR) model was employed to estimate and investigate the dynamics of average rainfall and temperature within different quantile levels/points, according to the monthly year-on-year average rainfall and temperature indices from three selected districts in Ghana from January 2000 and February 2018. It was found that both rainfall and temperature series are stationary across the three districts in Ghana. And we also observe a statistically significant inverse association among rainfall as well as temperature across the three selected districts in Ghana. It was evidenced that the estimated autoregressive coefficients across the three districts presume different values alongside the conditional distributions of rainfall and temperature indices. And the unit root test indicates the general or absolute stationarity of the series.
Dynamic Change Monitoring of Coastal Environment Based On Domestic GF Images
Authors: Li Pengfei , Huang Mutao , Wang Jinmeng
Published: April 2020

Based on independent GF remote sensing images, DEM data, GIS data and other data resources and computer technology, this paper developed a B/S version of the coastal zone environmental dynamics monitoring system for on-line monitoring of coastal land type changes. This paper selects the coastal zone of Wenchang City in Hainan Province as a research object, and uses remote sensing technology and post-classification change monitoring methods to perform online pre-processing and change monitoring for the GF remote sensing images of 2016 and 2018, and demonstrates the obtained coastal land change results in the form of graphs. By analyzing the graphs display results, can clearly understand the changes in the land types of the coastal zone, and effectively provide the basis for government departments to govern the sea environment.
Study on the Influence of Layout of Double Coal Seam Working Face on Overlying Strata
Authors: Sun Xueyang , Zhang Qi , Li Cheng , Zhang Lei
Published: April 2020

The design of mining face is very important, it is not only an basis for rational and effective coal mining, but also affects the subsidence area and surface environment of overlying strata.Taking a coal mine as an example, study the development law of coal mining subsidence under the condition of double coal seam mining by means of the combination of similar material simulation experiment and numerical simulation. The results obtained by the two methods are basically the same. The larger the width of the coal pillar, the smaller the overlapping area of the upper and lower coal seam, and the smaller the influence range of coal seam mining deformation and failure. It is suggested that the mining time and mining distance of the two coal seams should be extended, the width of coal pillar should be increased, so as to slow down the deformation and damage range of overburden, and protect the surface ecological environment.
Dendroremediation of Metal and Metalloid Elements with Poplar and Willow in the Floodplain Area Downstream a Mining Hill, Tongling, China
Authors: Kataweteetham L , Rong G , Zhu J , Chu Y , Liu Shengquan
Published: April 2020

Practical remediation technology is in great need to reclaim the land polluted with heavy metals and metalloids. Dendroremediation, the use of trees to remove pollutants from the environment is a cost-effective and eco-friendly technology. In this study, poplar and willow growing on the floodplain downstream a mining hill in Tongling city, China, as well as local soils were sampled to access the phytoextraction ability of different parts of the two tree species on Cu, Zn, Cd and As. The results showed that both species of the trees grew well in spite of the stress from the high content of the toxic elements, especially Cd and As. The root, bark, trunk, and branch of both species demonstrated Bio-concentration Factors (BCFs) of the four elements between 0.001 and 0.5, with Cu and Zn having higher BCFs than that of the other two elements and the bark and root having higher BCFs than the trunk and branch. Poplar showed relatively higher averaged BCFs than willow for all the elements, except As, while willow had higher averaged Translocation Factors (TFs) than poplar. Though both species are not hyperaccumulators for these elements, they were considered suitable for soil remediation and forestation in this region.
Is/Are Customer Satisfaction and Trust Mediating Factors of Loyalty for OTA---from China’s Case?
Authors: Chen Jianbin , Lin Yanqiao
Published: April 2020

The author studies the influencing factors of OTA customer loyalty by taking Qunar and Ctrip as an example. Based on the relevant theories, the author constructs a SEM model that affects OTA customer loyalty, including information ease of use, products and services, risk, switching costs as independent variables, satisfaction and trust as intermediate variables, and loyalty as dependent variables. Through questionnaire survey, data collection and analysis show that product and service, switching cost have a significant positive impact on customer satisfaction, trust and loyalty. Among them, the switching cost has the biggest effect on customer loyalty and trust. Products and services have the greatest impact on customer satisfaction. Satisfaction and trust have a significant positive impact on loyalty. As intermediary variables, pre-variables can indirectly affect OTA customer loyalty through satisfaction and trust.
Sea Natural Resource Potential for Blue Growth Policy Implementation in Baltic Sea Region
Authors: Pudzis E. , Geipele S. , Geipele I.
Published: April 2020

The goal of the research is to investigate and to identify effective Blue RIS3 implementation measures and best practices in the six participating Baltic Sea regions and to synthesize the findings in one research paper. The analysis aims at finding important aspects and conditions for future Blue Growth and RIS3 implementation in Baltic Sea. This resaerch lead to answerng question – how to susatianably and in the smart way use Baltic Sea natural resurces to create smart and economicaly growing region within European Union.
Evaluation on Green Transformation Competitiveness of Oil-gas Resource-based Cities in China
Authors: Sun Mingming , Yang Xiaolong
Published: April 2020

The green transformation is an important direction of the transformation of oil-gas resource-based cities. From the three aspects of environmental protection, resource utilization and transformation, a comprehensive evaluation index system for the competitiveness of the green transformation of oil-gas resources-based cities has been established, and the entropy method has been used to determine the index weights and the correlation matrix method to calculate the comprehensive evaluation score. The green transformation competitiveness of 10 typical oil-gas resources-based cities in China is evaluated. The results show that the green transformation effect of oil-gas resources-based cities in China is generally not obvious. Different cities have very obvious differences in transformation structures.
Urban Wind Energy Evaluation–A Case Study in NCUT Campus
Authors: Wang Biao , Sun Shuai
Published: April 2020

Urban wind energy exploitation is beneficial for a green city. This article takes a case study of a university campus and evaluates the wind resource over three most potential buildings in the campus. Long-term wind data collected over roof was used as wind rose to offer wind initial condition for CFD numerical simulation. Eight sessions with corresponding wind data were considered for simulation of wind environment of the whole campus. Weighted wind velocities at 6m and 10m above roof of the three chosen buildings were compared. With correction coefficient from values got from simulation and measurement, relative true wind velocities above the three buildings were found mostly more than 3 m/s. One building was taken with detailed evaluation with wind turbine installation and the payback period is 24 years, which is feasible and worthwhile to exploit wind energy in this campus.
Establishment and Experimental Analysis of Runtime Humidity Soft Sensing Model of PEMFC Based on Internal Resistance
Authors: Tan Baohua , Xiao Tengfei , Quan Rui , Quan Shuhai , Chen Hongbin
Published: April 2020

The internal humidity is very important in Proton Exchange Membrane Fuel Cell, but it cannot be measured directly because of the closed structure of the cell. It has been proofed that humidity has strongly contract with some internal parameters such as resistance, temperature and gas pressure. After studying and analysis on classical humidity mechanism models, this paper operated some experiments on PEMFC runtime humidity based on soft sensing technology, then established and test humidity soft sensing model based on runtime internal resistance. The experiment results shown that the output value of soft sensing model matched well with the theoretical calculation data. And the errors were almost within 1%. It verified the effectiveness of soft sensing model based on internal resistance.