bluuebunny/crossref_metadata_2025_split huggingface dataset:
Approximate controllability of semilinear impulsive strongly damped wave equation
Authors: Larez Hanzel , Leiva Hugo , Rebaza Jorge , Ríos Addison 
Published: June 2015

Abstract
Rothe's fixed-point theorem is applied to prove the interior approximate controllability of a semilinear impulsive strongly damped wave equation with Dirichlet boundary conditions in the space

Z

1
/
2

=
D

(

(
-
Δ
)

1
/
2

)

×

L
2

(
Ω
)

${Z_{1/2} = D((-\Delta )^{1/2}) \times L^{2}(\Omega )}$

, where Ω is a bounded domain in ℝ
n
(n ≥ 1). Under some conditions we prove the following statement: For all open nonempty subsets ω of Ω the system is approximately controllable on

[
0
,
τ
]

${[0, \tau ]}$

.
Moreover, we exhibit a sequence of controls steering the nonlinear system from an initial state z
0 to a neighborhood of the final state z
1 at time

τ
>
0

${\tau &gt;0}$

.
The Use of Chicken Igy in a Double Antibody Sandwich Elisa for the Quantification of Melittin in Bee Venom and Bee Venom Melittin Content in Cosmetics
Authors: Suh Lindsey Y. K. , Kartoon Tayabaa , Gujral Naiyana , Yoon Youngmee , Suh Joo Won , Sunwoo Hoon 
Published: June 2015

Abstract
Two enzyme-linked immunosorbent assay (ELISA) - based detection systems: indirect competitive ELISA and biotinylated double antibody sandwich ELISA (DAS-ELISA) were developed to determine the melittin concentration in honeybee (Apis mellifera) venom and the melittin concentration in cosmetics which contain bee venom. The indirect competitive ELISA employed chicken anti-melittin IgY. The biotinylated DAS-ELISA employed anti-melittin monoclonal antibody (MAb) and biotinylated anti-melittin IgY. To produce anti-melittin IgY; Sigma melittin was emulsified with Freund‘s incomplete adjuvant and immunised to Leghorn laying chickens intramuscularly at four different sites (50 μg/mL, 0.25 mL per site) of the breast muscles. After 5 to 8 weeks of the immunisation, anti-melittin IgY was extracted and analysed by ELISA. The anti-melittin IgY antibody produced was highly specific to melittin and did not cross-react with other bee venom proteins, as examined by ELISA and a western-blot assay. Indirect competitive ELISA demonstrated a higher range of melittin detection (2.5 to 80 μg/mL). Double antibody sandwich ELISA using MAb as the capture antibody and biotinylated polyclonal IgY as the detection antibody, provided a lower range of detection (2.5 - 40 ng/mL), which has a 1000 times higher sensitivity than that of indirect competitive ELISA. Therefore, indirect competitive ELISA is a useful tool to measure the concentration of melittin in bee venom as a raw material. Biotinylated DAS-ELISA, on the other hand, is more suitable for nanoscale quantification of melittin in commercial products.
Differential Scanning Calorimetry for Determining the Thermodynamic Properties of Selected Honeys
Authors: Tomaszewska-Gras Jolanta , Bakier Sławomir , Goderska Kamila , Mansfeld Krzysztof 
Published: June 2015

Abstract
Thermodynamic properties of selected honeys: glass transition temperature (Tg), the change in specifi c heat capacity (ΔCp), and enthalpy (ΔH) were analysed using differential scanning calorimetry (DSC) in relation to the composition i.e. water and sugar content. Glass transition temperatures (Tg) of various types of honey differed significantly (p<0.05) and ranged from -49.7°C (polyfloral) to -34.8°C (sunflower). There was a strong correlation between the Tg values and the moisture content in honey (r = -0.94). The degree of crystallisation of the honey also influenced the Tg values. It has been shown that the presence or absence of sugar crystals influenced the glass transition temperature. For the decrystallised honeys, the Tg values were 6 to 11°C lower than for the crystallised honeys. The more crystallised a honey was, the greater the temperature difference was between the decrystallised and crystallized honey. In conclusion, to obtain reliable DSC results, it is crucial to measure the glass transition after the complete liquefaction of honey.
Application of Gas Chromatography with the Mass Detector (GC-MS) Technique for Detection of Beeswax Adulteration with Paraffin
Authors: Waś Ewa , Szczęsna Teresa , Rybak-Chmielewska Helena 
Published: June 2015

Abstract
To detect beeswax adulteration with hydrocarbons of alien origin (e.g. paraffin), gas chromatography with mass detector (GC-MS) technique was used. The method has been verified here on beeswax samples with different addition (3, 5, 10, 30, and 50%) of paraffin and validated under the conditions of repeatability and within - laboratory reproducibility. The addition of paraffin to beeswax can already be detected on the basis of an analysis of the chromatograms. The intensity of individual alkane peaks increased with the increase of the amount of paraffin added to the beeswax. This increase was the mostly visible for the alkanes with even numbers of carbon atoms in the molecule: C24H50, C26H54, C28H58, C30H62, C32H66, and C34H70. These observations have also been proven by quantitative analysis performed using the internal standard method. Adding paraffin to beeswax resulted in an increase in the total contents of n-alkanes as well as individual alkanes, and in particular, of the even-numbered alkanes. The addition of paraffin to beeswax also resulted in the appearance of alkanes containing over 35 carbon atoms in the molecule, which were not detected in beeswax. The method for determination of beeswax hydrocarbons with the GC-MS technique is characterised by satisfactory repeatability and within-laboratory reproducibility. This method can be used for the detection of beeswax adulteration with hydrocarbons of alien origin (e.g. paraffin).
Thermal transport across a thin film composite due to laser short-pulse heating
Authors: Bin Mansoor Saad , Yilbas Bekir Sami 
Published: June 2015

Abstract
Laser short-pule irradiation of silicon-diamond-aluminum thin films is
considered and energy transport across the films is modelled using the
Boltzmann transport equation. Electron-phonon coupling is adopted to
formulate energy transfer across the electron and lattice sub-systems in the
aluminum film. Thermal boundary resistance is incorporated at the film
interfaces. The transfer matrix method is used to account for the
transmittance, reflection and absorption of the incident laser radiation
across the films. Equivalent equilibrium temperature is introduced to access
energy transport in the films, which represents the average energy of all
phonons around a local point when they redistribute adiabatically to an
equilibrium state. It is found that equivalent equilibrium temperature
increases sharply in the electron sub-system due to electron excess energy
gain from the irradiated field. Equivalent equilibrium temperature decays
gradually in the lattice sub-system with increasing period due to phonon
scattering in the film.
Dyshormonogenesis seems to be more frequent in a group of Cameroonian children with congenital hypothyroidism
Authors: Um Sap Suzanne Ngo , Koki Paul , Dongmo Felicité Nguefack , De Djob Louis , Tedga Annie , Awa Hubert Mbassi , Chelo David , Boula Angeline 
Published: June 2015

AbstractCongenital hypothyroidism is a main congenital endocrine disorder, affecting 1 in 4000 births. It is not well described in sub-Saharan countries, and to draw attention to that issue, we decided to describe affected pediatric patients. We retrospectively analyzed the records of eight patients over a period of 6 years. We analyzed clinical sings of hypothyroidism and psychomotor development; hormonal assays and thyroid ultrasound were performed. We included four boys and four girls aged from 3 to 84 months at diagnosis with a median thyroid-stimulating hormone (TSH) level of 156.5 mUI/L. All except one present with a moderate psychomotor delay. Other clinical signs were classical for hypothyroidism. Thyroid ultrasound performed showed a goiter in half of patients, a normal gland in three of them and a hypoplasic gland in the last one, consonant with dyshormonogenesis. We therefore concluded that dyshormonogenesis seems to be more frequent in our context, and this raised the issue of neonatal screening of hypothyroidism in Africa.
On the smoothness of the free boundary
in a nonlocal one-dimensional parabolic
free boundary value problem
Authors: Semerdjieva Rossitza 
Published: June 2015

Abstract
We consider one-dimensional parabolic free boundary value problem with a nonlocal (integro-differential)
condition on the free boundary. Results on Cm-smoothness of the free boundary are obtained. In particular, a
necessary and sufficient condition for infinite differentiability of the free boundary is given.
Two bounds on the noncommuting graph
Authors: Nardulli Stefano , Russo Francesco G. 
Published: June 2015

Abstract
Erdős introduced the noncommuting graph in order to study the number of commuting elements in a
finite group. Despite the use of combinatorial ideas, his methods involved several techniques of classical analysis.
The interest for this graph has become relevant during the last years for various reasons. Here we deal with a
numerical aspect, showing for the first time an isoperimetric inequality and an analytic condition in terms of Sobolev
inequalities. This last result holds in the more general context of weighted locally finite graphs.
A signature-based algorithm for computing
Gröbner-Shirshov bases in skew solvable
polynomial rings
Authors: Zhao Xiangui , Zhang Yang 
Published: June 2015

Abstract
Signature-based algorithms are efficient algorithms for computing Gröbner-Shirshov bases in commutative
polynomial rings, and some noncommutative rings. In this paper, we first define skew solvable polynomial
rings, which are generalizations of solvable polynomial algebras and (skew) PBW extensions. Then we present a
signature-based algorithm for computing Gröbner-Shirshov bases in skew solvable polynomial rings over fields.
On Poincaré duality for pairs (G,W)
Authors: Andrade Maria Gorete Carreira , Fanti Ermínia de Lourdes Campello , Fêmina Lígia Laís 
Published: June 2015

Abstract
Let G be a group and W a G-set. In this work we prove a result that describes geometrically, for a Poincaré
duality pair (G, W ), the set of representatives for the G-orbits in W and the family of isotropy subgroups. We also
prove, through a cohomological invariant, a necessary condition for a pair (G, W ) to be a Poincaré duality pair when
W is infinite.
Chaotic and hypercyclic properties of the quasi-linear Lasota equation
Authors: Hung Cheng-Hung 
Published: June 2015

Abstract
In this paper we describe an explicit solution semigroup of the quasi-linear Lasota equation. By
constructing the relationship of this solution semigroup with the translation semigroup we obtain some sufficient
and necessary conditions for the solution semigroup of the quasi-linear Lasota equation to be hypercyclic or chaotic
respectively.
Do Group Exams Support English as an Additional Language Student Learning?
Authors: Caldecott Marion , Emmioglu Esma 
Published: June 2015

Abstract
Team-based learning (TBL) has been shown to improve many aspects of student learning, but no previous research has systematically examined the effects of group exams on English as an Additional Language (EAL) students in university classrooms. This study is a small-scale action research examining the role of students’ English language status in their perceptions of and performance in group exams within TBL. The data were collected from 29 students – (13 EAL) and 16 English as a first language (EL1) – attending a third-year university linguistics class in Vancouver, Canada. Qualitative and quantitative methods were used for the data analysis. Results of the study revealed no statistically significant differences between the two groups in terms of perceptions or performance. Both groups had positive perceptions about group exams and the increase in their performance over the course of the semester was statistically significant. Qualitative results showed that students found group exams helpful for learning and reducing exam anxiety. Students also enjoyed the experience of taking group exams and stated that their attitudes toward the group exams were more positive at the end of the semester.
Performance and field implementation of a new fracturing fluid consisting of hydrophobically associating polyacrylamide and anionic surfactant
Authors: Zhao Zhongcong , Liu Tongyi , Luo Pingya , Li Yan , Liu Jianxin , Cheng Jiangmin , Yu Yi 
Published: June 2015

Abstract
The fundamental cause of the proppant suspension behavior in hydraulic fracturing fluids lies in its internal microcosmic network structure and structural strength. In addition to chemical crosslinking, another method to form a network structure is established in this paper. Hydrophobically associating polyacrylamide and an anionic surfactant self-assembly process was applied to form a network structure. Compared with crosslinked hydroxypropyl guar gel, the new fracturing fluid even has better proppant suspending properties in static conditions. The capability does not result from crosslinkage but from reinforced physical associations between chains. The performance of this new fracturing fluid was tested and the results showed that it can fully satisfy the requirement of fracturing fluid. Field test shows excellent stimulation effects during its applications in 400 wells in eight oilfields in China.
Application of the fractional-stable distributions for approximation of the gene expression profiles
Authors: Saenko Viacheslav , Saenko Yury 
Published: June 2015

AbstractNowadays, there are reliable scientific data highlighting that the probability density function of the gene expression demonstrates a number of universal features commonly observed in the microarray experiments. First of all, these distributions demonstrate the power-law asymptotics and, secondly, the shape of these distributions is inherent for all organisms and tissues. This fact leads to appearance of a number of works where authors investigate various probability distributions for an approximation of the empirical distributions of the gene expression. Nevertheless, all these distributions are not a limit distribution and are not a solution of any equation. These facts, in our opinion, are essential shortcoming of these probability laws. Besides, the expression of the individual gene is not an accidental phenomenon and it depends on the expression of the other genes. This suggests an existence of the genic regulatory net in a cell. The present work describes the class of the fractional-stable distributions. This class of the distributions is a limit distribution of the sums of independent identically distributed random variables. Due to the power-law asymptotics, these distributions are applicable for the approximation of the experimental densities of the gene expression for microarray experiments. The parameters of the fractional stable distributions are statistically estimated by experimental data and the functions of the empirical and theoretical densities are compared. Here we describe algorithms for simulation of the fractional-stable variables and estimation of the parameters of the the fractional stable densities. The results of such a comparison allow to conclude that the empirical densities of the gene expression can be approximated by the fractional-stable distributions.
Metaphor and the notion of control in trauma talk
Authors: Tay Dennis , Jordan Jennifer 
Published: June 2015

Abstract
Metaphor use in psychotherapy practice has been influenced by conceptual metaphor theory and the “internal target–external source” assumption, where targets comprise abstract therapeutic issues, while sources comprise concrete conceptual materials external to the therapeutic setting. The relevance of metaphor is hence questionable in trauma talk, since traumatic events involve intense bodily experiences which are already concrete and do not require any external inferential support. We examine transcripts of semi-structured interviews with 14 subjects following the 2010–2012 earthquakes in Christchurch, New Zealand, focusing on the role of metaphor in their conceptualization of a sense of “control” over their immediate physical environment, and more abstract aspects of their lives in the earthquakes’ aftermath. We discuss four discursive patterns which show how speakers used metaphor as a mechanism to extend or refocus initial discussion of physical control, to subsequent discussion of abstract control. This suggests that metaphor goes beyond a conceptualization role to play a “scaffolding” role in trauma talk, where an initial target topic may serve as a source concept for a subsequent target topic. Therapists therefore do not necessarily have to “look externally” for productive source domains, but could capitalize upon conceptual materials which present themselves as therapeutic interaction unfolds.
Analysis of Ablative Performance of C/C Composite Throat Containing Defects Based on X-ray 3D Reconstruction in a Solid Rocket Motor
Authors: Hui Wei-Hua , Bao Fu-Ting , Wei Xiang-Geng , Liu Yang 
Published: June 2015

AbstractIn this paper, a new measuring method of ablation rate was proposed based on X-ray three-dimensional (3D) reconstruction. The ablation of 4-direction carbon/carbon composite nozzles was investigated in the combustion environment of a solid rocket motor, and the macroscopic ablation and linear recession rate were studied through the X-ray 3D reconstruction method. The results showed that the maximum relative error of the X-ray 3D reconstruction was 0.0576%, which met the minimum accuracy of the ablation analysis; along the nozzle axial direction, from convergence segment, throat to expansion segment, the ablation gradually weakened; in terms of defect ablation, the middle ablation was weak, while the ablation in both sides was more serious. In a word, the proposed reconstruction method based on X-ray about C/C nozzle ablation can construct a clear model of ablative nozzle which characterizes the details about micro-cracks, deposition, pores and surface to analyze ablation, so that this method can create the ablation curve in any surface clearly.
La formación-acción en equipos de trabajo Un estudio de caso con estudiantes de traducción e interpretación en la Universidad de Valladolid
Authors: Gómez Susana 
Published: June 2015

Resumen
El objetivo de este artìculo es describir una enriquecedora experiencia de aprendizaje que se está llevando a cabo en la Universidad de Valladolid con estudiantes de traducciñn e interpretaciñn y expertos en el área participantes de un proyecto de innovaciñn docente de excelencia.
Este proyecto supone una experiencia formativa y colaborativa en la que los estudiantes participantes reciben una formaciñn práctica como complemento a sus estudios (de gran utilidad en su tarea diaria y de cara a su futuro profesional), y los expertos actúan como mentores en una relaciñn horizontal de ayuda, apoyo, confianza y refuerzo positivo caracterìstica del liderazgo transformacional. El objetivo principal es fomentar que los estudiantes aprendan a trabajar en equipo de forma eficaz viéndose a sì mismos como profesionales actuando en un contexto real y significativo en el que se contemplan y valoran sus ideas, destrezas y fortalezas.
Il problema della traduzione e il “linguaggio dell‟ineffabile” nella Commedia di Dante in rapporto alla traduzione russa del poema
Authors: Landa Kristina 
Published: June 2015

Riassunto
Il presente articolo tratta del ―linguaggio dell‘ineffabilità‖ di Dante Alighieri alla luce della teoria della traduzione, e di alcune strutture di questo linguaggio nella traduzione russa della Divina Commedia di M.L. Lozinskij. Molti hanno scritto sul linguaggio di Dante come mezzo d‘espressione delle verità mistiche. Eppure non esiste un lavoro critico in cui questo tema si studi dal punto di vista della scienza traduttiva. Il nostro obiettivo è dimostrare l‘importanza del tema della ―traduzione‖ delle verità divine nel linguaggio umano per la poetica dantesca e scoprire come tale ―traduzione‖ si effettui nella traduzione russa della Commedia ad alcuni livelli testuali.
Cyclophanes, Part 73: diastereoselective dimerization of an α,β-unsaturated ketone. Structure of all-trans-1,3-dibenzoyl-2,4-di([2.2]paracyclophan-4-yl)cyclobutane
Authors: Hopf Henning , Dix Ina , Jones Peter G. 
Published: June 2015

Abstract
The dimerization of an α,β-unsaturated ketone led to a product that consists of a single diastereomer with all-trans configuration, as shown by an X-ray structure investigation. We postulate that the steric bulk of the 4-[2.2]paracyclophanyl substituent is responsible for the diastereoselectivity. The central cyclobutane ring is puckered, with a fold angle of 27.9(1)°. The cyclophane units show the usual distortions associated with the bridge strain.
Synthesis and characterization of some new fluoroquinolone-barbiturate hybrid systems
Authors: Sweidan Kamal , El-Abadelah Mustafa M. , Haddad Salim F. , Voelter Wolfgang 
Published: June 2015

Abstract
New hybrid molecules containing fluoroquinolone-barbiturate moieties were synthesized via simple routes, followed by characterization using various spectroscopic approaches. The THF solvent molecule was incorporated into compounds 2 and 3 through its oxygen atom based on its nucleophilicity. Facile displacement of the chloride ion in 4-oxoquinoline-3-carbonyl chloride by the nucleophilic methylene carbon of 1,3-dialkylbarbiturate/thiobarbiturate afforded the respective hybrids 5 and 6.
Rising trend in vitamin D status from 1993 to 2013: dual concerns for the future
Authors: McKenna Malachi J , Murray Barbara F , O'Keane Myra , Kilbane Mark T 
Published: June 2015

BackgroundThe Institute of Medicine 2011 Report on Dietary Reference Intakes for Calcium and Vitamin D specified higher intakes for all age groups compared to the 1997 report, but also cautioned against spurious claims about an epidemic of vitamin D deficiency and against advocates of higher intake requirements. Over 40 years, we have noted marked improvement in vitamin D status but we are concerned about hypervitaminosis D.ObjectiveWe sought to evaluate the 25-hydroxyvitamin D (25OHD) trend over 20 years.DesignWe retrieved all results of serum 25OHD from 1993 to 2013 (n=69 012) that was trimmed to one sample per person (n=43 782). We conducted a time series analysis of the monthly averages for 25OHD using a simple sequence chart and a running median smoothing function. We modelled the data using univariate auto-regressive integrated moving average (ARIMA) and forecast 25OHD levels up to 2016.ResultsThe time series sequence chart and smoother function demonstrated a steady upward trend with seasonality. The yearly average 25OHD increased from 36.1 nmol/l in 1993 to 57.3 nmol/l in 2013. The ARIMA model was a good fit for the 25OHD time series; it forecasted monthly average 25OHD up to the end of 2016 with a positive stationary R2 of 0.377.ConclusionsVitamin D status improved over the past 40 years, but there remains a dual problem: there are groups at risk of vitamin D deficiency who need public health preventative measures; on the other hand, random members of the population are taking unnecessarily high vitamin D intakes for unsubstantiated claims.