bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Series of Exceptionally Robust Luminescent Coordination Polymers Based on a Bipyridyldicarboxylate Ligand and Rare‐Earth‐Metal Ions
Authors: Li Liangjun , Tang Sifu , Lv Xiaoxia , Cai Jinjun , Wang Chao , Zhao Xuebo 
Published: November 2013

AbstractA series of three‐dimensional rare‐earth coordination polymers, [M2(bpdc)3(H2O)4] (M = Y [1], Sm [2], Eu [3], Gd [4], Tb [5], Dy [6], Er [7], and Yb [8]) were synthesized by solvothermal reactions of 2,2′‐bipyridine‐5,5′‐dicarboxylate (bpdc) with corresponding metal salts. Single‐crystal and powder X‐ray diffraction analyses demonstrated that these coordination polymers are isostructural. The carboxyl groups of the bpdc ligand are coordinated to metal ions and the 2,2′‐bipyridine moieties are left free due to the preferable affinity of rare‐earth metals for oxygen‐donor atoms. The adjacent eight‐coordinate MO8 cores show dicapped trigonal prismatic environments; they are interconnected by carboxyl groups and are further bridged through the bipyridyl linkers to give quite dense three‐dimensional networks. Photoluminescent studies at room temperature reveal intense red and green luminescent emissions for EuIII and TbIII analogues, respectively. Furthermore, it is noteworthy that bpdc shows an effective antenna effect in sensitizing emissions from EuIII and TbIII ions. Thermogravimetric analyses demonstrate that these coordination polymers exhibit exceptional thermal stability (decomposing at T > 580 °C under N2 for compound 1). Water‐resistance measurements of these coordination polymers show excellent hydrothermal stability.
Synthetic Studies Towards the Core Structure of Nakadomarin A by a Thioamide‐Based Strategy
Authors: Chavda Jai K. , Procopiou Panayiotis A. , Horton Peter N. , Coles Simon J. , Porter Michael J. 
Published: November 2013

AbstractThe tricyclic BCD substructure of the marine natural product nakadomarin A has been synthesised. The strategy utilised a key carbon–carbon bond‐forming reaction between a furan and an N‐acyliminium ion derived from a secondary thiolactam. In addition, a novel three‐component coupling reaction between a thioamide, an allylic bromide and an isocyanate, leading to the establishment of two new stereogenic centres, is reported.
Design of linear precoder for multiuser MIMO system with spatial correlation and imperfect CSI
Authors: Kejalakshmi V. , Arivazhagan S. 
Published: November 2013

AbstractMinimum mean square error (MMSE) based linear precoder in multiple antenna downlink wireless communication system with imperfect channel state information (CSI) at the base station (BS) is considered in this paper. The CSI available at the BS is modelled by incorporating antenna correlation at the BS, channel estimation error variance and temporal correlation coefficient. If the temporal correlation coefficient is known at the BS, the current CSI can be updated. To improve the performance of the system, the future channel is predicted using two‐dimensional MMSE prediction. In this paper, the proposed MMSE linear precoder is designed by considering the imperfect CSI and two‐dimensional predicted CSI. The computer simulation results validate the bit error rate performance of the proposed system when compared to the previously proposed precoders, which consider channel estimation error variance only. Copyright © 2013 John Wiley & Sons, Ltd.
THE ALARM DISTRESS BABY SCALE IN A LONGITUDINAL PORTUGUESE STUDY REANALYZED WITH ATTACHMENT DATA
Authors: Costa Raquel , Figueiredo Bárbara 
Published: November 2013

ABSTRACTThe relationship established between the infant and the caregiver is central to both parents and infants, and provides one of the most important environments in wich children develop. This study aimed to assess the effect of infant's psychophysiological functioning early in life on the quality of mother–infant interaction and on later attachment, and to explore the mediation effects of the quality of mother–infant interaction on the association between the infant's psychophysiological functioning and attachment security. A longitudinal prospective design was conducted with 94 infants and their mothers. Eight‐week‐old infants were assessed with the Neonatal Behavioral Assessment Scale (T.B. Brazelton & J.K. Nugent, 1995) and the Alarm Distress Baby Scale (A. Guedeney & J. Fermanian, ). At 8 to 12 weeks of age, cortisol levels were measured both before and after routine inoculation. Mother–infant interaction was evaluated at 12 to 16 weeks, using the Global Rating Scales (L. Murray, A. Fiori‐Cowley, R. Hooper, & P. Cooper, ). The Strange Situation procedure (M. Ainsworth, M. Blehar, E. Waters, & S. Wall, 1978) was performed at 12 months. The overall quality of mother–infant interaction mediates the relation between infant's behavioral and physiological profile and infant attachment: The probability of been securely attached increased with good mother behavior and with good overall interaction. The co‐construction of the mother–infant relationship depends on the infant characteristics and on patterns of interaction.
Thriving at work: Impact of psychological capital and supervisor support
Authors: Paterson Ted A. , Luthans Fred , Jeung Wonho 
Published: November 2013

SummaryThriving at work is a positive psychological state characterized jointly by learning and vitality. Conventional wisdom and some initial research indicate that such thriving benefits both employees themselves and their organizations. This study specifically tests thriving at work by linking it to a theoretically important personal outcome variable (self‐development), refining its relationship with agentic work behaviors (task focus and heedful relating), and proposing and testing two new antecedent variables (psychological capital and supervisor support climate). Using structural equation modeling on a sample of 198 dyads (employees and their supervisors), strong support was found for the theory‐driven hypothesized relationships. The results contribute to a better understanding of positive organizational scholarship and behavior in general and specifically to the recently emerging positive construct of employees' thriving at work. Copyright © 2013 John Wiley & Sons, Ltd.
Copy number analysis of NIPBL in a cohort of 510 patients reveals rare copy number variants and a mosaic deletion
Authors: Cheng Yu‐Wei , Tan Christopher A. , Minor Agata , Arndt Kelly , Wysinger Latrice , Grange Dorothy K. , Kozel Beth A. , Robin Nathaniel H. , Waggoner Darrel , Fitzpatrick Carrie , Das Soma , Gaudio Daniela del 
Published: November 2013

AbstractCornelia de Lange syndrome (CdLS) is a genetically heterogeneous disorder characterized by growth retardation, intellectual disability, upper limb abnormalities, hirsutism, and characteristic facial features. In this study we explored the occurrence of intragenic NIPBL copy number variations (CNVs) in a cohort of 510 NIPBL sequence‐negative patients with suspected CdLS. Copy number analysis was performed by custom exon‐targeted oligonucleotide array‐comparative genomic hybridization and/or MLPA. Whole‐genome SNP array was used to further characterize rearrangements extending beyond the NIPBL gene. We identified NIPBL CNVs in 13 patients (2.5%) including one intragenic duplication and a deletion in mosaic state. Breakpoint sequences in two patients provided further evidence of a microhomology‐mediated replicative mechanism as a potential predominant contributor to CNVs in NIPBL. Patients for whom clinical information was available share classical CdLS features including craniofacial and limb defects. Our experience in studying the frequency of NIBPL CNVs in the largest series of patients to date widens the mutational spectrum of NIPBL and emphasizes the clinical utility of performing NIPBL deletion/duplication analysis in patients with CdLS.
Special functions and systems in Hermitian Clifford analysis: Higher codimension
Authors: De Schepper Nele , Peña Dixan Peña , Sommen Frank 
Published: November 2013

AbstractIn this paper, we investigate a Cauchy–Kowalevski (CK) extension problem that arises naturally within the framework of Hermitian Clifford analysis, which concerns the study of Dirac‐like operators in several complex variables. The work presented here includes CK extensions of higher codimension and in particular the CK extension of the Gauss distribution in several complex variables. Copyright © 2013 John Wiley & Sons, Ltd.
Global existence of weak solution to Navier–Stokes equations with large external force and general pressure
Authors: Suen Anthony 
Published: November 2013

AbstractWe study the 3‐D compressible Navier–Stokes equations with an external potential force and a general pressure. We prove the global‐in‐time existence of weak solutions with small‐energy initial data and with densities being positive and essentially bounded. No smallness assumption is made on the external force. Copyright © 2013 John Wiley & Sons, Ltd.
On‐line detection of persistently high packet‐rate flows via a sliding window scheme with random packet sampling
Authors: Kudo Takanori , Takine Tetsuya 
Published: November 2013

SUMMARYWe consider on‐line detection of persistently high packet‐rate flows. We assume that flow information is collected via a time‐based sliding window scheme with random packet sampling. In this framework, we propose a method of determining the threshold of the number of sampled packets, which guarantees the false negative ratio. We also formulate and solve the design problem of our scheme, where we aim to minimize the false positive ratio. We then conduct sampling experiments with public trace data and confirm that our method works well as designed. Copyright © 2013 John Wiley & Sons, Ltd.
Birds for the Elite? Fowling in the Northern Netherlands in the Roman Period and the Early Middle Ages
Authors: Zeiler J. 
Published: November 2013

ABSTRACTIn 1991–1993, large‐scale excavations were carried out at Wijnaldum‐Tjitsma, an artificial dwelling mound (terp) in the north‐western part of the province of Friesland in the Netherlands. Several finds of luxury products made clear that in the Early Middle Ages, the site must have been a place of importance.The excavations yielded a huge amount of well‐conserved animal remains, among them many bird bones. In this paper, it will be discussed to what extent the special status of the inhabitants is reflected by the assemblages of bird remains, in particular those of waders. Furthermore, the methods of wildfowling will be discussed, with special attention to the development of the clap‐net. Copyright © 2013 John Wiley & Sons, Ltd.
Photorefractive polymers for holography
Authors: Lynn Brittany , Blanche Pierre‐Alexandre , Peyghambarian Nasser 
Published: November 2013

ABSTRACTThis review describes the current state‐of‐the‐art of photorefractive polymers for holography. The analysis of this rich field begins with a brief historical perspective followed by descriptions of prevailing physical models relating basic parameters of the polymer constituents to the bulk response of the final device. Methods for probing these responses and the underlying phenomena are discussed followed by an overview of the recent holographic applications of photorefractive polymers. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 193–231
Migration as Movement and Multiplace Life: Some Recent Developments in Rural Living Structures in Turkey
Authors: Öztürk Murat , Hilton Andy , Jongerden Joost 
Published: November 2013

ABSTRACTDiscussing recent trends and developments in migration and mobility affecting what may be referred to as a ‘reconstitution’ of villages, this paper discusses the changing character of rural settlement and settlement patterns in Turkey today. The binary division of rural and urban is questioned through a dialectical/relational approach to settlement formation, while settlement is defined by relation to (human) movement, itself understood as incorporating the modalities of migration and mobility. By focusing on the socio‐economics of increasing affluence, the advance of capital generally, and the introduction of neoliberalism into agriculture in particular, a number of contemporary rural‐oriented (migratory/mobility) movements and ‘living structures’ are investigated, which, taken together, suggest a growing development of ‘dual settlement’ and ‘multiplace hybrid’ life. The paper concludes with a typology of villages and some thoughts on the theoretical implications of this study. Copyright © 2013 John Wiley & Sons, Ltd.
A more secure and efficient Andrew Secure RPC protocol
Authors: Boonkrong Sirapat 
Published: November 2013

ABSTRACTThe Andrew Secure Remote Procedure Call (RPC) is a protocol that allows two parties to establish a new cryptographic key. The protocol was originally designed to work on the Andrew network of Carnegie Mellon University, USA. Its concept and method can now be used to enhance security of communications on different modules in smart cards, computer networks and the Internet. There have been many varieties of the protocol since it was designed. We questioned whether or not those existing Andrew Secure RPC varieties were really secure and efficient. It is shown in this paper that most of them are indeed not secure, and their efficiency can be improved. We carried out security analyses and experiments to illustrate that our proposed protocol here is more secure and 25% more efficient, in terms of speed, than the others. Copyright © 2013 John Wiley & Sons, Ltd.
Rhamnolipids Obtained from a PHA‐Negative Mutant of Pseudomonas aeruginosa 47T2 ΔAD: Composition and Emulsifying Behavior
Authors: Torrego‐Solana Noelia , García‐Celma M. José , Garreta Albert , Marqués Ana M. , Diaz Pilar , Manresa Angeles 
Published: November 2013

AbstractPseudomonas aeruginosa 47T2 (NCBIM 40044) synthesizes polyhydroxyalkanoic acids (PHAs) and rhamnolipids (Rhls). The knockout mutant for PHAs biosynthesis, P. aeruginosa 47T2 ΔAD prepared in this study, increased the cellular yield of Rhls production by 28 %. The Rhls mixture (composed up to eight homologs) reduced the water surface tension to 31.67 mN/m with a critical micelle concentration of 105 mg/L. The IC50 (μg/mL) of the neutral red uptake assay and methylthiazol tetrazolium assay ranged between 53.9 and 72 μg/mL, which is similar to that of sodium dodecyl sulfate (SDS). Rhamnolipids had a lower hemolytic effect at 110.8 μg/ml than SDS, a commercial anionic surfactant, at 43.6 μg/mL. This suggests that the Rhls mixture could be used in topical pharmaceutical and cosmetic applications or cleansers as a biosurfactant. The emulsifying properties in water/oil dispersions were determined using ternary phase diagrams at 25 °C. Isopropyl myristate, soybean oil, olive oil and Casablanca oil were used as the oil components. Total emulsions were obtained with most of the oils.
The doubling map with asymmetrical holes
Authors: GLENDINNING PAUL , SIDOROV NIKITA 
Published: November 2013

AbstractLet $0\lt a\lt b\lt 1$ and let $T$ be the doubling map. Set $ \mathcal{J} (a, b): = \{ x\in [0, 1] : {T}^{n} x\not\in (a, b), n\geq 0\} $. In this paper we completely characterize the holes $(a, b)$ for which any of the following scenarios hold: (i) $ \mathcal{J} (a, b)$ contains a point $x\in (0, 1)$; (ii) $ \mathcal{J} (a, b)\cap [\delta , 1- \delta ] $ is infinite for any fixed $\delta \gt 0$; (iii) $ \mathcal{J} (a, b)$ is uncountable of zero Hausdorff dimension; (iv) $ \mathcal{J} (a, b)$ is of positive Hausdorff dimension. In particular, we show that (iv) is always the case if $$\begin{eqnarray*}b- a\lt \frac{1}{4} { \mathop{\prod }\nolimits}_{n= 1}^{\infty } (1- {2}^{- {2}^{n} } )\approx 0. 175\hspace{0.167em} 092\end{eqnarray*}$$ and that this bound is sharp. As a corollary, we give a full description of first- and second-order critical holes introduced by N. Sidorov [Supercritical holes for the doubling map. Preprint, see http://arxiv.org/abs/1204.1920] for the doubling map. Furthermore, we show that our model yields a continuum of ‘routes to chaos’ via arbitrary sequences of products of natural numbers, thus generalizing the standard route to chaos via period doubling.
Spin-up of a magnetically driven tornado-like vortex
Authors: Vogt Tobias , Grants Ilmārs , Eckert Sven , Gerbeth Gunter 
Published: November 2013

AbstractThe spin-up of a concentrated vortex in a liquid metal cylinder with a free surface is considered experimentally and numerically. The vortex is driven by two flow-independent magnetic body forces. A continuously applied rotating magnetic field provides the source of the angular momentum. A pulse of about one order of magnitude stronger travelling magnetic field drives a converging flow that temporarily focuses this angular momentum towards the axis of the container. A highly concentrated vortex forms that produces a funnel-shaped surface depression. We explore experimentally the duration, the depth and the conditions of formation of this funnel. Additionally, we measure the axial velocity and calculate the axisymmetric flow field of this transient vortex at a lower force magnitude. The spin-up vortex is similar to the corresponding developed time-averaged turbulent vortex driven by the same magnetic forces (Grants et al., J. Fluid Mech., vol. 616, 2008, pp. 135–152). There are two main differences. First, the maximum swirl concentration condition cannot be expressed as a constant ratio of the two driving forces. Second, a much higher degree of swirl concentration is feasible. We explain these differences as due to a much lower turbulence during the spin-up.
Lie Group Analysis for a Mixed Convective Flow and Heat Mass Transfer Over a Permeable Stretching Surface with Soret and Dufour Effects
Authors: Abdel-Rahman Reda G. , Megahed Ahmed M. 
Published: November 2013

ABSTRACTThe Lie group transformation method is applied for solving the problem of mixed convection flow with mass transfer over a permeable stretching surface with Soret and Dufour effects. The application of Lie group method reduces the number of independent variables by one and consequently the system of governing partial differential equations reduces to a system of ordinary differential equations with appropriate boundary conditions. Further, the reduced non-linear ordinary differential equations are solved numerically by using the shooting method. The effects of various parameters governing the flow and heat transfer are shown through graphs and discussed. Our aim is to detect new similarity variables which transform our system of partial differential equations to a system of ordinary differential equations. In this work a special attention is given to investigate the effect of the Soret and Dufour numbers on the velocity, temperature and concentration fields above the sheet.
Comparisons of Flow and Mixing Characteristics between Unforced and Excited Elevated Transverse Jets
Authors: Hsu C. M. , Huang R. F. 
Published: November 2013

ABSTRACTThe influences of acoustic excitation on the velocity field and mixing characteristic of a jet in cross-flow were investigated in a wind tunnel. The acoustic excitation waves at resonance Strouhal number were generated by a loudspeaker. The time-averaged velocity field and streamlines of the excited elevated transverse jet in the symmetry plane were measured by a high-speed particle image velocimetry. The visual penetration height and spread width were obtained by using an image processing technique. The dispersion characteristics were obtained from the tracer-gas concentration measurement. The results showed that the streamline pattern of the non-excited transverse jet was significantly modified by the acoustic excitation—the bent streamlines evolved from the jet exit escalated and the vortex rings in the jet and tube wakes and the recirculation bubble in the jet wake disappeared. The time-averaged velocity distributions revealed that the excited transverse jet produces large momentum in the up-shooting direction so that the velocity trajectories were located at levels higher than those of the non-excited one. The mixing characteristics, which include the visual penetration height, spread width, and dispersion, were drastically improved by the acoustic excitation due to the changes in the flow structures. The excited transverse jet characterized at larger jet-to-crossflow momentum flux ratios presented larger improvement in the mixing characteristics than at lower jet-to-crossflow momentum flux ratios.
Word order, referential expression, and case cues to the acquisition of transitive sentences in Italian
Authors: ABBOT-SMITH KIRSTEN , SERRATRICE LUDOVICA 
Published: November 2013

ABSTRACTIn Study 1 we analyzed Italian child-directed-speech (CDS) and selected the three most frequent active transitive sentence frames used with overt subjects. In Study 2 we experimentally investigated how Italian-speaking children aged 2;6, 3;6, and 4;6 comprehended these orders with novel verbs when the cues of animacy, gender, and subject–verb agreement were neutralized. For each trial, children chose between two videos (e.g., horse acting on cat versus cat acting on horse), both involving the same action. The children aged 2;6 comprehended S + object-pronoun + V (soprov) significantly better than S + V + object-noun (svonoun). We explain this in terms of cue collaboration between a low cost cue (case) and the firstargument = agent cue which we found to be reliable 76% of the time. The most difficult word order for all age groups was the object-pronoun + V + S (oprovs). We ascribe this difficulty to cue conflict between the two most frequent transitive frames found in CDS, namely V + object-noun and object-pronoun + V.
Talking theory of mind talk: young school-aged children's everyday conversation and understanding of mind and emotion
Authors: DE ROSNAY MARC , FINK ELIAN , BEGEER SANDER , SLAUGHTER VIRGINIA , PETERSON CANDIDA 
Published: November 2013

ABSTRACTLinks between young children's everyday use of mindful conversational skills and their success on laboratory tests of theory of mind understanding (ToM) were evaluated. Using published scales, teachers rated the conversational behavior and shyness of 129 children aged 60 to 101 months (M = 78·8 months) who were in their first years of primary school. The children also took batteries of first- and second-order false-belief tests along with tests of emotion understanding and general language ability. Correlational and regression analyses showed that performance on false-belief tests of ToM significantly predicted children's competence at reading others' minds in their everyday conversational interactions. Furthermore, these links transcended individual differences in language ability, shy personality, emotion understanding, and age. These findings augment and extend a growing body of evidence linking performance on laboratory ToM tests to socially competent real-world behavior.
Production and perception of listener-oriented clear speech in child language
Authors: SYRETT KRISTEN , KAWAHARA SHIGETO 
Published: November 2013

ABSTRACTIn this paper, we ask whether children are sensitive to the needs of their interlocutor, and, if so, whether they – like adults – modify acoustic characteristics of their speech as part of a communicative goal. In a production task, preschoolers participated in a word learning task that favored the use of clear speech. Children produced vowels that were longer, more intense, more dispersed in the vowel space, and had a more expanded F0 range than normal speech. Two perception studies with adults showed that these acoustic differences were perceptible and were used to distinguish normal and clear speech styles. We conclude that preschoolers are sensitive to aspects of the speaker–hearer relationship calling upon them to modify their speech in ways that benefit their listener.