bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of the queen's age on the Varroa mite (Varroa destructor) burden of honey bee (Apis mellifera L.) colonies
Authors: Takács Marianna , Oláh János 
Published: April 2019

An apiary trial was conducted in 2016 August to October in Szabolcs-Szatmár-Bereg County, Nyírmada to evaluate the influence of queen’s age on the Varroa destructor-burden in the treatment colonies. Sixty colonies of bees belonging to the subspecies Apis mellifera carnica pannonica in Hunor loading hives (with 10 frames in the brood chamber/deep super) were used. The colonies were treated with amitraz and the organophosphate pesticide coumaphos active ingredients. The amitraz treatment includes 6 weeks. The coumaphos treatment with Destructor 3.2% can be used for both diagnosis and treatment of Varroasis. For diagnosis, one treatment is sufficient. For control, two treatments at an interval of seven days are required. The colonies were grouped by the age of the queen: 20 colonies with one-year-old, 20 colonies with two-year-old and 20 colonies with three-year-old queen. The mite mortality of different groups was compared. The number of fallen mites was counted at the white bottom boards. The examination of spring growth of honey bee colonies has become necessary due to the judgement of efficiency of closing treatment. The data was recorded seven times between 16th March 2017 and 19th May 2017.
Data on fallen mites were subjected to one-way analysis of variance (ANOVA) and Post-Hoc Tukey-test. Statistical analysis was performed using the software of IBM SPSS (version 21.). During the first two weeks after treatments, the number of fallen mites was significantly higher in the older queen’s colonies (Year 2014). The total mite mortality after amitraz treatment in the younger queen’s colonies was lower (P<0.05) compared to the three-year-old queen’s colonies. According to Takács and Oláh (2016) although the mitemortality tendency, after the coumaphos (closing) treatment in colonies which have Year 2014 queen showed the highest rate, considering the mite-burden the colonies belongs to the average infected category. The colonial maintenance ability of three-year-old queen cannot be judged based on the influencing effect on the mite-burden. The importance of the replacement of the queen was judged by the combined effect of several factors.
During the spring-growth study (16th March–19th May) was experienced in the three-year-old queen’s colonies the number of brood frames significantly lower compared to the one- and two-year-old queen’s colonies. In the study of 17th April and 19th May each of the three queen-year-groups were varied. Therefore in the beekeeping season at different times were determined the colonial maintenance ability of queens by more factors: efficiency of closing treatment in early spring, the spring-growth of bee colonies, the time of population shift (in current study, this time was identical in each queen-year), honey production (from black locust).
Evaluation of population parameters and biometric data of an Eurasian Collared Dove (Streptopelia decaocto Friv.) population in the Great Plain of Hungary
Authors: Varga Sámuel , Juhász Lajos 
Published: April 2019

The Eurasian Collared Dove shows different patterns in density all over Hungary. In some cases, the population has decreased to a lower level, but there are habitats where the population remained stable. Several factors were taken into consideration during the evaluation of this phenomenon. These publications state that the increased urbanization of corvids, the lack of food sources, and the changes in nesting sites caused the decrease in numbers. During our research, we intend to contrast the differences in population structure of Collared Doves that differ from each other in the density of predators presented at nesting sites. As a first step, in this paper, numerous samples (n=118) were taken from a population that is less influenced by corvid species’ nest predation. Our prediction was that the population parameters remained at the level of 1980’s, in which the population of Eurasian Collared Dove has reached its maximum, according to further publications.
During the evaluation process, our data were collected from hunting bags near Nyíregyháza. Results were compared with former publications. We stated that the population structure, such as age and gender distribution remained stable in the evaluated population. In addition, morphometric factors of the collected individuals were also measured, such as weight, wing length, 3rd primary feather, and tail length, which were compared with former surveys. During statistical tests no significant difference was revealed among population parameters, but there were significant differences between most of the morphometric data, (p>0.05).
Faktor-Faktor yang Memengaruhi Foerign Direct Investment (FDI) di Enam Koridor Ekonomi Indonesia: Market Seeking atau Resource Seeking?
Authors: Rahayu Iriani Trisna , Pasaribu Ernawati 
Published: April 2019

Pembangunan ekonomi suatu negara sangat tergantung pada besarnya penanaman modal asing langsung atau Foreign Direct Investment (FDI), termasuk di enam koridor ekonomi Indonesia. Kesenjangan kondisi di koridor ekonomi diperkirakan akan membawa perbedaan yang mempengaruhi arus masuk FDI ke dalam koridor. Penelitian ini menggunakan regresi data panel untuk menganalisis faktor-faktor di balik arus masuk FDI di setiap koridor ekonomi dan untuk menentukan karakteristik FDI di setiap koridor ekonomi. Hasil penelitian menunjukkan bahwa proporsi belanja modal pemerintah, jumlah angkatan kerja berpendidikan tinggi, keterbukaan perdagangan, dan proporsi ekspor minyak dan mineral hanya mempengaruhi arus masuk FDI di beberapa koridor ekonomi. Lebih jauh lagi dapat diindikasikan bahwa sementara “market seeking FDI” terjadi di semua koridor ekonomi Indonesia, “resource seeking FDI” hanya ditemukan di koridor ekonomi Sulawesi, Maluku dan Papua.
An enrichment program for students with high intellectual ability: Positive effects on school adaptation
Authors: García-Perales Ramón , Almeida Leandro-S. 
Published: April 2019

This article notes the low rate of highly talented or gifted students formally identified in Spain compared to international benchmarks. These students are not properly identified, so a lack of specific educational responses for these highly talented students is also expected. Trying to counteract this trend, this article presents an enrichment program imparted to a group of students with high intellectual abilities during the academic year 2017/18 over three weekly sessions during school hours, where emerging technologies were an important key in how it was delivered. The experimental design included an experimental group of high ability students and two control groups, one consisting of students with high abilities who did not receive specific educational responses and another consisting of a group of regular schoolchildren in terms of abilities. The results showed that the implementation of specific educational responses improved children’s levels of adaptation and in some cases, their school performance. These data are discussed in an attempt to recommend enrichment programs integrated into the classroom as an appropriate educational response to gifted or high ability students. Attention to diversity of all students in the classroom is possible, for example by resorting to ICT, increasing the educational inclusion of students with high intellectual capacity.Este trabajo apunta la reducida tasa de alumnado con características de superdotación o altas capacidades identificados formalmente en España tomando los referenciales internacionales. Este alumnado no es debidamente identificado, entonces también se anticipa la falta de respuestas educativas específicas para estos escolares con altas capacidades. Intentando contrariar esta tendencia, este artículo presenta un programa de enriquecimiento aplicado a un grupo de alumnos y alumnas con altas capacidades intelectuales durante el curso académico de 2017/18 a lo largo de tres sesiones semanales en horario escolar y donde las tecnologías emergentes tienen una importancia clave en el desarrollo del mismo. En el plano experimental, se tomó un grupo experimental de escolares con altas capacidades y dos grupos de control, uno conformado por alumnado con altas capacidades que no reciben respuestas educativas específicas y otro constituido por un grupo de escolares regulares en términos de capacidades. Los resultados muestran que la implementación de respuestas educativas específicas mejora los niveles de adaptación infantil y, en algunos casos, su rendimiento escolar. Se discuten estos datos en una tentativa de recomendación de programas de enriquecimiento integrados en las clases como respuesta educativa apropiada a los escolares con superdotación o altas capacidades. La atención a la diversidad de todo el alumnado en las aulas es posible, por ejemplo, recurriendo a las TIC, favoreciendo la inclusión educativa del alumnado con altas capacidades.
Twist1 and Twist2 Induce Human Macrophage Memory upon Chronic Innate Receptor Treatment by HDAC-Mediated Deacetylation of Cytokine Promoters
Authors: Sun Rui , Hedl Matija , Abraham Clara 
Published: April 2019

Abstract
Intestinal tissues are continuously exposed to microbial products that stimulate pattern-recognition receptors (PRRs). Ongoing PRR stimulation can confer epigenetic changes in macrophages, which can then regulate subsequent immune outcomes and adaptation to the local environment. Mechanisms leading to these changes are incompletely understood. We found that short-term stimulation of the PRR NOD2 in primary human monocyte-derived macrophages resulted in increased H3 and H4 acetylation of cytokine promoters, consistent with the increased cytokine secretion observed. However, with prolonged NOD2 stimulation, both the acetylation and cytokine secretion were dramatically decreased. Chronic NOD2 stimulation upregulated the transcription factors Twist1 and Twist2, which bound to the promoters of the histone deacetylases HDAC1 and HDAC3 and induced HDAC1 and HDAC3 expression. HDAC1 and HDAC3 then mediated histone deacetylation at cytokine promoters and, in turn, cytokine downregulation under these conditions. Similar regulation was observed upon chronic stimulation of multiple PRRs. Consistent with the chronic microbial exposure in the intestinal environment, TWIST1, TWIST2, HDAC1, and HDAC3 were upregulated in human intestinal relative to peripheral macrophages. Importantly, complementing HDAC1 and HDAC3 in Twist1/Twist2-deficient monocyte-derived macrophages restored the reduced histone acetylation on cytokine promoters and the decreased cytokine secretion with chronic NOD2 stimulation. Taken together, we identify mechanisms wherein Twist1 and Twist2 promote chromatin modifications, resulting in macrophage instruction and adaptation to conditions in the intestinal microenvironment.
The role of dividend policy in share price volatility
Authors: Pelcher Lydia 
Published: April 2019

Orientation: A key objective of a company is to maximise shareholder wealth. Distribution of created wealth is achieved either through reinvestment in the company, which increases share value, or through dividend payouts. This encapsulates the dividend policy of a company. In order to realise a cash return, the former requires an investor to liquidate part of the investment, while the latter provides an immediate cash return.Research purpose: The objective was to establish whether relationships exist between share price volatility and dividend policy for shares listed on the Johannesburg Stock Exchange Limited (JSE).Motivation for the study: Dividend policy is an important consideration in the wealth creation process, particularly whether or not to distribute dividends to shareholders. Dividend policy is often structured to cater for shareholders’ expectations.Research design, approach and method: Panel data analysis was employed on a sample of the top 40 JSE-listed shares from 2007 to 2016.Main findings: The results indicated that the association between share price volatility and dividend yield is positive and significant but that between share price volatility and payout ratio is insignificant.Practical/managerial implications: Dividends were proven to be relevant to shareholders and have an association with share price volatility.Contribution/value-add: Dividend policy for the top 40 companies listed on the JSE is a contributor to share price volatility. In order to minimise share price volatility, managers of dividend-paying companies should structure the dividend policy to have consistent dividend payments but also able to reinvest excess cash within the company.
Continuous electrochemical reactor improved by the addition of Moringa oleífera lam extract: optimization of operational conditions for Blue 5G dye removal
Authors: Santos Bruna Souza dos , Eyng Eduardo , Bittencourt Paulo Rodrigo Stival , Frare Laercio Mantovani , Flores Éder Lisandro de Moraes , Costa Michelle Budke 
Published: April 2019

Wastewaters from textile industries are known for their difficulty to treat, several alternative technologies are applied for their treatment. In this context, the study examined a hybrid treatment system, composed of electrocoagulation combined with a natural coagulant (extract of Moringa oleífera lam seeds) to remove reactive dye Blue 5G aqueous solutions. The work evaluated the use of milder operating conditions to improve the efficiency of treatment, with reduced demands for electrical power and coagulant. The following factors were evaluated: electric current intensity, natural coagulant concentration and hydraulic retention time. A quadratic model was adjusted and validated at a 5% significance level. The overall optimization resulted in conditions of 0.28 A for electrical current intensity, 1000.00 mg L-1 of aqueous extract of Moringa oleífera lam and 5 min for hydraulic retention time. While operating under optimal conditions, the removal of 71.38% of color and 5.22 mg L-1 of iron residual concentration was achieved.
Newforms of Half-integral Weight: The Minus Space Counterpart
Authors: Baruch Ehud Moshe , Purkait Soma 
Published: April 2019

AbstractWe study genuine local Hecke algebras of the Iwahori type of the double cover of $\operatorname{SL}_{2}(\mathbb{Q}_{p})$ and translate the generators and relations to classical operators on the space $S_{k+1/2}(\unicode[STIX]{x1D6E4}_{0}(4M))$, $M$ odd and square-free. In [9] Manickam, Ramakrishnan, and Vasudevan defined the new space of $S_{k+1/2}(\unicode[STIX]{x1D6E4}_{0}(4M))$ that maps Hecke isomorphically onto the space of newforms of $S_{2k}(\unicode[STIX]{x1D6E4}_{0}(2M))$. We characterize this newspace as a common $-1$-eigenspace of a certain pair of conjugate operators that come from local Hecke algebras. We use the classical Hecke operators and relations that we obtain to give a new proof of the results in [9] and to prove our characterization result.
Laboratory assessment of the influence of rice straw mulch size on soil loss
Authors: de Lima João L. M. P. , Santos Lara , Mujtaba Babar , de Lima M. Isabel P. 
Published: April 2019

Abstract. Application of crop residues (mulch) over the soil surface is a
common practice to control soil erosion and promote infiltration. This
laboratory study aimed at investigating the effect of different rice straw
mulch sizes on runoff and sediment transport. The experimental runs were
conducted using a soil flume of adjustable slope and a rainfall simulator,
considering bare soil and three different soil covers: 1, 2 and 5 t ha−1
application rates, for three sizes of rice straw mulch (10, 30
and 200 mm). The experimental results showed that for the same mulch
application rate (by weight), the smaller mulch sizes (i.e. high surface
coverage percentage) presented less soil loss. For example, 90 % soil loss
reduction was achieved for smaller sizes of rice straw mulch and 80 % for
the bigger size. The results of this study are an important contribution to
the understanding of the soil loss process in small basins and to the
definition of relevant soil conservation measures, at the plot/field scale.
A statistical and process-oriented evaluation of cloud radiative effects in high-resolution global models
Authors: Thomas Manu Anna , Devasthale Abhay , Koenigk Torben , Wyser Klaus , Roberts Malcolm , Roberts Christopher , Lohmann Katja 
Published: April 2019

Abstract. This study evaluates the impact of atmospheric horizontal resolution on the
representation of cloud radiative effects (CREs) in an ensemble of global
climate model simulations following the protocols of the High Resolution
Model Intercomparison Project (HighResMIP). We compare results from four
European modelling centres, each of which provides data from “standard”-
and “high”-resolution model configurations. Simulated radiative fluxes are
compared with observation-based estimates derived from the Clouds and Earth's
Radiant Energy System (CERES) dataset. Model CRE biases are evaluated using
both conventional statistics (e.g. time and spatial averages) and after
conditioning on the phase of two modes of internal climate variability,
namely the El Niño–Southern Oscillation (ENSO) and the North Atlantic
Oscillation (NAO). Simulated top-of-atmosphere (TOA) and surface CREs show
large biases over the polar regions, particularly over regions where seasonal
sea-ice variability is strongest. Increasing atmospheric resolution does not
significantly improve these biases. The spatial structure of the cloud
radiative response to ENSO and NAO variability is simulated reasonably well
by all model configurations considered in this study. However, it is
difficult to identify a systematic impact of atmospheric resolution on the
associated CRE errors. Mean absolute CRE errors conditioned on the ENSO phase
are relatively large (5–10 W m−2) and show differences between
models. We suggest this is a consequence of differences in the
parameterization of SW radiative transfer and the treatment of cloud optical
properties rather than a result of differences in resolution. In contrast,
mean absolute CRE errors conditioned on the NAO phase are generally smaller
(0–2 W m−2) and more similar across models. Although the regional
details of CRE biases show some sensitivity to atmospheric resolution within
a particular model, it is difficult to identify patterns that hold across all
models. This apparent insensitivity to increased atmospheric horizontal
resolution indicates that physical parameterizations play a dominant role in
determining the behaviour of cloud–radiation feedbacks. However, we note
that these results are obtained from atmosphere-only simulations and the
impact of changes in atmospheric resolution may be different in the presence
of coupled climate feedbacks.
Unexplained hydrogen isotope offsets complicate the identification and quantification of tree water sources in a riparian forest
Authors: Barbeta Adrià , Jones Sam P. , Clavé Laura , Wingate Lisa , Gimeno Teresa E. , Fréjaville Bastien , Wohl Steve , Ogée Jérôme 
Published: April 2019

Abstract. We investigated plant water sources of an emblematic refugial
population of Fagus sylvatica (L.) in the Ciron river gorges in south-western France using
stable water isotopes. It is generally assumed that no isotopic
fractionation occurs during root water uptake, so that the isotopic
composition of xylem water effectively reflects that of source water.
However, this assumption has been called into question by recent studies
that found that, at least at some dates during the growing season, plant
water did not reflect any mixture of the potential water sources. In this
context, highly resolved datasets covering a range of environmental
conditions could shed light on possible plant–soil fractionation processes
responsible for this phenomenon. In this study, the hydrogen (δ2H) and oxygen (δ18O) isotope compositions of all
potential tree water sources and xylem water were measured fortnightly over
an entire growing season. Using a Bayesian isotope mixing model (MixSIAR),
we then quantified the relative contribution of water sources for F. sylvatica and
Quercus robur (L.) trees. Based on δ18O data alone, both species used a mix
of top and deep soil water over the season, with Q. robur using deeper soil water
than F. sylvatica. The contribution of stream water appeared to be marginal despite the
proximity of the trees to the stream, as already reported for other riparian
forests. Xylem water δ18O could always be interpreted as a
mixture of deep and shallow soil waters, but the δ2H of xylem
water was often more depleted than the considered water sources. We argue
that an isotopic fractionation in the unsaturated zone and/or within the
plant tissues could underlie this unexpected relatively depleted δ2H of xylem water, as already observed in halophytic and xerophytic
species. By means of a sensitivity analysis, we found that the estimation of
plant water sources using mixing models was strongly affected by this
δ2H depletion. A better understanding of what causes this
isotopic separation between xylem and source water is urgently needed.
Caractérisation des premiers épisodes de schizophrénie à partir de bases de données
administratives de santé jumelées
Authors: Beaudoin Mélissa , Potvin Stéphane , Dellazizzo Laura , Surprenant Maëlle , Lesage Alain , Vanasse Alain , Ngamini-Ngui André , Dumais Alexandre 
Published: April 2019

Il est fréquent de voir émerger des symptômes avant que le diagnostic de
schizophrénie (SCZ) soit posé. Ceux-ci sont cependant peu spécifiques (p. ex. anxiété,
symptômes dépressifs). Malgré plusieurs études sur le sujet, il n’y a toujours pas de
consensus sur les symptômes qui précèdent la psychose. Cette étude vise à évaluer les
présentations cliniques survenant avant le diagnostic de SCZ en fonction de l’âge et du sexe
au Québec à l’aide de données administratives (RAMQ, MED-ÉCHO). 24 883 hommes et femmes âgés
de plus de 18 ans ayant reçu un diagnostic de premier épisode de schizophrénie entre 2004 et
2007 ont été analysés. Les différents diagnostics antérieurs, par sexe et âge, sont
rapportés en fréquence cumulée. L’analyse montre que la majorité de l’échantillon était
composé d’hommes (53 %) et de patients âgés de 30 à 54 ans (45 %). En ajustant selon la
distribution de l’âge dans la population, l’incidence est plus élevée entre 18 et 29 ans
chez les hommes et au-delà de 55 ans chez les femmes. Dans la moitié des cas, la
schizophrénie est diagnostiquée après l’âge de 29 ans. Les patients n’ayant aucun antécédent
prémorbide de troubles mentaux représentaient 65 % de l’échantillon. 35 % des personnes
avaient un antécédent, soit, plus fréquemment (en ordre décroissant), la psychose maniaque
dépressive, le trouble dépressif, les troubles liés à l’usage de substances et les troubles
anxieux. Les observations de cette étude, démontrant des différences entre les
caractéristiques sociodémographiques et les antécédents psychiatriques, offrent des avenues
pour le dépistage de nouveaux cas pour les programmes d’intervention précoce, notamment de
ne pas limiter ces programmes aux personnes de moins de 30 ans.