bluuebunny/crossref_metadata_2025_split huggingface dataset:
Parenting changes in adults with cancer
Authors: Moore Cynthia W. , Rauch Paula K. , Baer Lee , Pirl William F. , Muriel Anna C. 
Published: June 2015

BACKGROUNDChildren whose parents have cancer are at risk for psychosocial difficulties; however, the mechanisms are not well understood. This cross‐sectional study sought support for a model connecting parental cancer to child distress through its impact on parenting self‐efficacy beliefs and parenting behaviors by examining relations among parental illness, quality of life/parent functioning, parenting efficacy beliefs, and concerns about children's emotional distress.METHODSOne hundred ninety‐four adult oncology outpatients with children who were 18 years old or younger completed questionnaires assessing their health‐related quality of life (Functional Assessment of Cancer Therapy–General), depression and anxiety symptoms (Hospital Anxiety and Depression Scale), overall distress (Distress Thermometer), and parenting efficacy beliefs and parenting concerns (Parenting Concerns Questionnaire).RESULTSParenting efficacy scores for parents and coparents declined significantly after diagnosis. This decline correlated with more visits to a medical clinic, treatment with intravenous chemotherapy in the past month, poorer health‐related quality of life, and more depression and distress. Parents experiencing the most concern about the impact of mood, physical limitations, and changes in routines on their children experienced the biggest declines in their own sense of efficacy as parents and in their belief in their coparent's efficacy. Finally, declines in parenting efficacy beliefs correlated with parental concerns about children's emotional distress about aspects of the parent's illness.CONCLUSIONSThis study highlights the importance of identifying and addressing parenting concerns to alleviate patient distress, and it may help to guide future intervention efforts. Cancer 2015;121:3435–43. © 2015 American Cancer Society.
Cooperative multi‐cellular large MIMO over asynchronous channel training
Authors: Kobayashi Ricardo Tadashi , Abrão Taufik 
Published: June 2015

SummaryThis work analyzes multi‐cell MIMO systems equipped with a very large number of antennas in the base‐station (BS) side and with low‐complexity zero‐forcing and matched‐filter receivers. Cooperation between BSs in a multi‐cell scenarios is analyzed in order to avoid the well‐known pilot contamination effect on massive MIMO systems, while the effects of asynchronism between users and BSs in training phase using different pilot sequences, for example, Walsh–Hadamard, Gold, and Kasami sequence sets on the system performance are examined. As low‐complexity processing is deployed, the synchronism offset in training phase may introduce errors on the channel estimation process, adding its effect to the pilot contamination, resulting in an aggressive detection scenario. Numerical results using the BER as a performance figure of merit measure in downlink have corroborated our finding. It was also developed an analytical error formula for channel estimation subject to synchronization offset levels in terms of fractional unit of symbol time duration, which was validated through channel mean squared error and BER performance simulation results. Through these both performance figures and under practical scenarios, the use of pseudo‐random sequence sets may be preferable instead of orthogonal ones, mainly because of their out‐of‐phase cross‐correlation levels. Copyright © 2015 John Wiley & Sons, Ltd.
Clustering‐based low‐complexity resource allocation in two‐tier femtocell networks with QoS provisioning
Authors: Fu Fengchao , Lu Zhaoming , Xie Yuanbao , Jing Wenpeng , Wen Xiangming 
Published: June 2015

SummaryIn this paper, we study the resource allocation problem of the uplink transmission with delay quality‐of‐service constraints in two‐tier femtocell networks. Particularly, to provide statistical delay guarantees, the effective capacity is employed as the network performance measure instead of the conventional Shannon capacity. To make the problem computationally efficient and numerically tractable, we decompose the problem into three subproblems, namely, cluster configuration subproblem, intra‐cluster subchannel allocation subproblem and inter‐cluster power control subproblem. Firstly, we develop a low‐complexity heuristic semi‐dynamic clustering scheme, where the delay of the channel state information feedback via backhaul is considered. We model such system in the framework of networked partial observation Markov decision process and derive a strategy to reduce the search range for the best cluster configuration. Then, for a given cluster configuration, the cluster heads deal with subchannel allocation and power control within each cluster. We propose a subchannel allocation scheme with proportional fairness. Thereafter, the inter‐cluster power control subproblem is modeled as a set of exact potential games, and a channel quality related pricing mechanism is presented to mitigate inter‐cluster interference. The existence and uniqueness of Nash equilibriums for the proposed game are investigated, and an effective decentralized algorithm with guaranteed convergence is designed. Simulation results demonstrate that the proposed algorithms not only have much lower computational complexity but also perform close to the exhaustive search solutions and other existing schemes. Copyright © 2015 John Wiley & Sons, Ltd.
Syntheses, Structures, and Characteristics of Six Coordination Polymers Based on 1,4‐Bis(imidazol‐1‐yl)benzene and Isophthalates Containing Coordination‐Inert Substituents
Authors: Li Xiaoju , Su Yanqing , Li Xinxiong , Ma Guangchao , Ling Qidan 
Published: June 2015

AbstractHydrothermal reactions of 1,4‐bis(imidazol‐1‐yl)benzene (bimb) and either 5‐hydroxyisophthalic acid (HO‐H2ip) or 5‐methoxyisophthalic acid (MeO‐H2ip), as well as transition metal salts, gave rise to six new coordination polymers: [Zn2(bimb)(H2O)(HO‐ip)2]n (1), [Zn(bimb)(MeO‐ip)]n·(H2O)n (2), [Mn2(bimb)2(HO‐ip)2]n (3), [Mn2(bimb)2(H2O)2(MeO‐ip)2]n (4), [Cu2(bimb)2(MeO‐ip)2]n·(H2O)3n (5), and [Co(bimb)(H2O)(MeO‐ip)]n·(DMF)0.5n·(H2O)n (6). Their structures have been defined by single‐crystal X‐ray diffraction analyses, IR spectra, elemental analyses and thermogravimetric analyses. Complex 1 is a 2D coordination network consisting of μ‐oxygen‐bridged dinuclear ZnII units, whereas 2 is an interdigitating 2D layer. ZnII ions in 1 and 2 have a distorted tetrahedral geometry, and two independent HO‐ip and two bimb moieties in the dinuclear unit of 1 form π···π stacking interactions. Complexes 3 and 4 are 2D layers consisting of dinuclear MnII carboxylate units; bimb in an anti conformation serves as an exo‐bidentate ligand in 3, whereas in 4 it acts as a terminal ligand, filling void space. Bis‐monodentate MeO‐ip in 5 connects CuII ions into a 3D coordination network, whereas MeO‐ip in 6 bridges between two CoII ions to form a 2D layer, with the strong hydrogen bonds between water molecules of the adjacent 2D layers generating a 2D supramolecular bilayer. The dinuclear MnII units in 3 and 4 are well separated by organic ligands, and make up the basic magnetic units. Temperature‐dependent magnetic susceptibility analyses show the existence of antiferromagnetic interaction in 3 and 4.
A Keggin‐Type Structure Expanded by an Eight‐Membered Ring of Alternating Edge‐Sharing VO5 and VO6 Polyhedra: Solvothermal Synthesis, Crystal Structure, and Magnetic Properties
Authors: Rasmussen Maren , Näther Christian , van Leusen Jan , Kögerler Paul , Bensch Wolfgang 
Published: June 2015

AbstractThe new tungstovanadate (trenH)2(trenH2)2[W4V13O44]·ca.11H2O was prepared under solvothermal conditions in a basic solution at pH ≈ 12. The cluster core contains VIV/VV centers with delocalized spins exhibiting strong antiferromagnetic exchange interactions as evidenced by temperature‐dependent magnetic susceptibility measurements pointing to an S = 1/2 magnetic ground state. The structure features an eight‐membered ring composed of four alternating edge‐sharing VO5 pyramids and VO6 octahedra encapsulating a central Keggin fragment.
Determining the Electronic Structure of a Series of [(phen)3M]0 (M = Ti, V, Mo) and [(pdi)2M]n+ (M = Cr, Mo) Complexes: Coordination of Neutral Ligands vs. π‐Radical Anions
Authors: Wang Mei , Weyhermüller Thomas , Wieghardt Karl 
Published: June 2015

AbstractThe molecular and electronic structures of newly synthesized complexes containing 2,6‐bis[1‐(4‐methoxyphenylimino)ethyl]pyridine (pdi) ligands have been determined by high‐resolution X‐ray crystallography, electronic and electron‐spin resonance spectroscopy, and temperature‐dependent magnetic susceptibility measurements: [MoIV(pdi··)(pdi2–)]0 (S = 0) 1, [MoIV(pdi2–)(pdi·)](BF4) (S = 1/2) 2, [CrIII(pdi··)(pdi·)]0 (S = 0) 3, [CrIII(pdi·)(pdi0)](BF4)2 (S = 1) 4, [MIII(Mephen·)3]0 (M = Cr 5, Mo 6, Ti 7, and V 8). Complexes 5–8 contain π‐radical anions of 2,9‐dimethyl‐1,10‐phenanthroline. Monoanionic radicals (SL = 1/2) are designated (pdi·)1– and (Mephen·)1–, whereas their neutral analogues are (pdi0) and (Mephen0) and the dianions are (pdi··)2– (SL = 1) and (pdi2–)2– (SL = 0). We show here that the oxidation level of these ligands can be determined experimentally in complexes 1–8 by high‐quality single‐crystal X‐ray crystallography at low temperature (ca. 100 K).
CuI‐Mediated α‐Ketoacylation of Sulfoximines under Solvent‐Free Conditions
Authors: Zou Ya , Peng Zhihong , Dong Wanrong , An Delie 
Published: June 2015

AbstractThe first preparation of α‐ketoacyl sulfoximines under solvent‐free conditions using aryl ethanones and NH‐sulfoximines has been discovered and a series of desired 2‐oxo‐2‐arylacetyl sulfoximines were successfully synthesized in good to excellent yields (up to 93 %). The unprecedented protocol requires no extra solvents, bases, or additives and demonstrates outstanding compatibility with assorted functional groups (up to 27 examples). A plausible double catalytic cycle mechanism involving elemental iodine and copper is proposed; in‐situ generated aryl‐α‐iodo‐ethanone and a sulfoximine‐liganded‐CuII intermediate play important roles in C(sp3)–N coupling. The postulated mechanism is inspired by key experimental investigations detailed here.
Palladium‐Catalyzed Desulfurative Carbocyclizations of α‐(3‐Butenoyl) Ketene Dithioacetals in the Presence of Silanes
Authors: Liu Bangyu , Chang Jian , Zheng Gang , Song Xiaoning , Wang Mang 
Published: June 2015

AbstractA combination of palladium and silane has been well used for the catalytic desulfurative cross‐coupling reactions under neutral conditions. Catalyzed by 10 mol‐% of bis(triphenylphosphine) palladium(II) dichloride in dimethylformamide in the presence of 2 equiv. of triphenylsilane, the carbocyclizations of α‐(3‐butenoyl) ketene dithioacetals took place smoothly leading to 2‐cyclopentenones in high yields. Thus, a new Heck‐type cyclization based on C–S bond cleavage for the synthesis of spiro compounds by using silanes as the desulfurative agents has been established.
Formal Dyotropic Rearrangements in Organometallic Transformations
Authors: Croisant Michael F. , Van Hoveln Ryan , Schomaker Jennifer M. 
Published: June 2015

AbstractA thorough understanding of the mechanistic steps that occur in organometallic processes is crucial to the development of new, increasingly sophisticated transformations. This microreview discusses an unusual class of organometallic reactions that occur through formal Type I dyotropic rearrangements, defined as processes involving the interchange of two groups along a stationary scaffold by breaking and reforming two σ bonds in which at least one σ bond is a M–X bond. Examples are subdivided into two categories – stoichiometric and catalytic – and further classified by the number of atoms across which the migrating groups interchange positions. The metal can either serve as the migrating group or function as part of the stationary scaffold. Furthermore, these rearrangements can proceed through a wide variety of different mechanisms that include oxidative insertion/reductive elimination, radical processes, or pathways in which the metal does not change oxidation state.
Synthesis of Polycycles by Single or Double Domino Nucleophilic Substitution/Diels–Alder Reaction
Authors: Camps Pelayo , Lozano David , Font‐Bardia Mercè 
Published: June 2015

AbstractNew hexacyclo and octacyclo compounds have been synthesized by a short route whose key step consists of a single or double domino nucleophilic substitution of neopentyl‐type iodides with potassium cyclopentadienide, followed by intramolecular Diels–Alder cycloaddition.
The contribution of pharmaceutically active compounds from healthcare facilities to a receiving sewage treatment plant in Canada
Authors: Kleywegt Sonya , Pileggi Vince , Lam Yuet Ming , Elises Alan , Puddicomb Aaron , Purba Gurminder , Di Caro Joanne , Fletcher Tim 
Published: June 2015

Abstract

Concentrations and percent loadings of pharmaceutically active compounds (PhACs) and other emerging contaminants released from healthcare facilities (2 hospitals and a long-term care facility) to a sewage treatment plant (STP) in a large urban sewershed were evaluated. An additional hospital outside the sewershed was also monitored. Fourteen of the 24 steroids/hormones and 88 of the 117 PhACs and emerging contaminants were detected at least once. Commonly used substances, including cotinine, caffeine and its metabolite 1,7-dimethylxanthine, ibuprofen and naproxen (analgesics), venlafaxine (antidepressant), and N,N-diethyl-meta-toluamide (insect repellant), were detected in all samples at all sites. Concentrations detected in the large specialty hospital outside the sewershed were similar to those within the sewershed. Cytotoxic drugs (tamoxifen and cyclophosphamide) and x-ray contrast media (iopamidol and diatrizoic acid) were infrequently detected in hospital effluents. Analysis for antibiotics indicated that azithromycin, clarithromycin, ciprofloxacin, erythromycin, ofloxacin, and sulfamethoxazole were consistently detected in hospital wastewaters, as was triclosan (antibacterial agent). Fifteen compounds individually contributed greater than 1% to the total PhAC and emerging contaminant load to the STP from the 2 hospitals in the sewershed, and 9 compounds in the STP effluent exceeded ecotoxicological criteria. The present survey demonstrates that point source discharges from healthcare facilities in this sewershed make a small contribution to the overall PhAC and emerging contaminant loading compared with the total concentrations entering the receiving STP. Environ Toxicol Chem 2016;35:850–862. © 2015 SETAC
The Geoarchaeology of Utica, Tunisia: The Paleogeography of the Mejerda Delta and Hypotheses Concerning the Location of the Ancient Harbor
Authors: Delile Hugo , Abichou Abdelhakim , Gadhoum Ahmed , Goiran Jean‐Philippe , Pleuger Elisa , Monchambert Jean‐Yves , Wilson Andrew , Fentress Elizabeth , Quinn Josephine , Ben Jerbania Imed , Ghozzi Faouzi 
Published: June 2015

Although the ancient site of Utica has been studied since the 19th century, the location of its harbors remains unresolved as they were buried under sediments as the Mejerda delta prograded and left Utica 10 km inland. Using relief data and a coring survey with sedimentological analysis, we identify the dynamics of the delta's progradation, which produced a double system of alluvial fans. These show that the ancient bay of Utica silted up faster and earlier than was thought, probably before the end of the Punic period. Combined with the radiocarbon dates from coring, this suggests that the harbor lay on the north‐western side of the Utica promontory, communicating with the sea by a marine corridor west of the northern compartment of the delta. As the infilling of the ancient bay progressed, this corridor narrowed until it disappeared completely in the early 5th/mid‐6th century A.D., when a peat bog developed on the northern side of the promontory, sealing the fate of Utica as a port. This relative environmental stability ended in the 9th–10th century A.D. when about 4 m of sediment, probably of fluvial origin, covered the peat bog, leaving the site more than 4.5 m above the local sea level.
Disrupted brain network topology in pediatric posttraumatic stress disorder: A resting‐state fMRI study
Authors: Suo Xueling , Lei Du , Li Kaiming , Chen Fuqin , Li Fei , Li Lei , Huang Xiaoqi , Lui Su , Li Lingjiang , Kemp Graham J. , Gong Qiyong 
Published: June 2015

AbstractChildren exposed to natural disasters are vulnerable to the development of posttraumatic stress disorder (PTSD). Recent studies of other neuropsychiatric disorders have used graph‐based theoretical analysis to investigate the topological properties of the functional brain connectome. However, little is known about this connectome in pediatric PTSD. Twenty‐eight pediatric PTSD patients and 26 trauma‐exposed non‐PTSD patients were recruited from 4,200 screened subjects after the 2008 Sichuan earthquake to undergo a resting‐state functional magnetic resonance imaging scan. Functional connectivity between 90 brain regions from the automated anatomical labeling atlas was established using partial correlation coefficients, and the whole‐brain functional connectome was constructed by applying a threshold to the resultant 90 * 90 partial correlation matrix. Graph theory analysis was then used to examine the group‐specific topological properties of the two functional connectomes. Both the PTSD and non‐PTSD control groups exhibited “small‐world” brain network topology. However, the functional connectome of the PTSD group showed a significant increase in the clustering coefficient and a normalized characteristic path length and local efficiency, suggesting a shift toward regular networks. Furthermore, the PTSD connectomes showed both enhanced nodal centralities, mainly in the default mode‐ and salience‐related regions, and reduced nodal centralities, mainly in the central‐executive network regions. The clustering coefficient and nodal efficiency of the left superior frontal gyrus were positively correlated with the Clinician‐Administered PTSD Scale. These disrupted topological properties of the functional connectome help to clarify the pathogenesis of pediatric PTSD and could be potential biomarkers of brain abnormalities. Hum Brain Mapp 36:3677–3686, 2015. © 2015 Wiley Periodicals, Inc.
The morphology of the pineal gland of the yellow‐toothed cavy (Galea Spixii Wagler, 1831) and red‐rumped agouti (Dasyprocta leporina linnaeus, 1758)
Authors: Câmara Felipe Venceslau , Guimarães Lopes Igor Renno , Benevides de Oliveira Gleidson , Fernandes Bezerra Ferdinando Vinicius , Matias de Oliveira Radan Elvis , Oliveira Júnior Carlos Magno , Rodrigues Silva Alexandre , de Oliveira Moacir Franco 
Published: June 2015

ABSTRACTThe pineal gland is an endocrine gland found in all mammals. This article describes the morphology of this important gland in two species of Caviideae, namely the yellow‐toothed cavy and the red‐rumped agouti. Ten adult animals of the two species used in current analysis were retrieved from the Center for the Multiplication of Wild Animals (CEMAS/UFERSA) and euthanized. The glands were removed and photographed in situ and ex situ. They were fixed in a paraformaldehyde solution 4% or glutaraldehyde 2.5% solution and submitted to routine histological techniques respectively for light and scanning electron microscopy. Macroscopically, the pineal gland with its elongated structure may be found between the cerebral hemispheres facing the rostral colliculi. Microscopically, pinealocytes and some glia cells were predominant. Contrastingly, to the cavy's pineal gland, a capsule covered the organ in the agouti, with the emission of incomplete septa to the interior, which divided it into two lobules. Light and scanning electron microscopes failed to show calcareous concretions in the pineal gland. Based on the topography of the cavy's and agouti's pineal gland, it may be classified as supra‐callosum and ABC type. Microsc. Res. Tech. 78:660–666, 2015. © 2015 Wiley Periodicals, Inc.
Development and microstructure of tooth histotypes in the blue shark, Prionace glauca (Carcharhiniformes: Carcharhinidae) and the great white shark, Carcharodon carcharias (Lamniformes: Lamnidae)
Authors: Moyer Joshua K. , Riccio Mark L. , Bemis William E. 
Published: June 2015

ABSTRACTCover illustration. Teeth of the blue shark Prionace glauca and the great white shark, Carcharodon carcharias represent two extremes in elasmobranch tooth structure that have been known since Agassiz (1833–1843) and Owen (1840–1845), specifically, the presence or absence of a pulp cavity in fully formed teeth. In this issue of the Journal of Morphology, Moyer et al. (pp. 797‐817) present a detailed study using light microscopy, scanning electron microscopy, and high‐resolution micro‐computed tomography to compare the structure and development of elasmobranch teeth representing these two histotypes. They discuss a possible correlation between tooth histotype and tooth replacement and review the history of histotype differentiation in sharks thereby dissolving some long held misinterpretations.
A time of change: Dynamics of chromatin and transcriptional regulation during nuclear programming in early Drosophila development
Authors: Boija Ann , Mannervik Mattias 
Published: June 2015

SUMMARYIn order for a new organism to form, the genomes of the highly specialized egg and sperm need to be reprogrammed into a totipotent state that is capable of generating all of the cell types that comprise an organism. This reprogramming occurs by erasing chromatin modifications, leaving the cells in a naïve state, followed by the induction of specialized programming events. Pioneer factors bind to the genome prior to zygotic genome activation, followed by acetylation of histones and further chromatin specialization by the addition of methylation marks later during differentiation. Genome‐wide approaches have provided insight into the genomic and epigenomic regulation of gene expression during development, providing a new perspective on the process of cell specification and differentiation. In this review, we discuss how distal DNA and core promoter elements, RNA polymerase pausing, transcription factors, and co‐regulators interact to shape the chromatin landscape and direct tissue‐specific expression patterns during embryo development, focusing on the well‐characterized Drosophila embryo. Mol. Reprod. Dev. 82: 735–746, 2015. © 2015 Wiley Periodicals, Inc.
Accuracy and convergence properties of the fixed‐stress iterative solution of two‐way coupled poromechanics
Authors: Castelletto N. , White J. A. , Tchelepi H. A. 
Published: June 2015

SummaryThe paper deals with the numerical solution of Biot's equations of coupled consolidation obtained by a mixed formulation combining continuous Galerkin finite‐element and multipoint flux approximation finite‐volume methods. The solution algorithm relies on the recently developed fixed‐stress solution scheme, in which first the flow problem and then the mechanical one are addressed iteratively. We show that the algorithm can be interpreted as a particular block triangular preconditioning strategy applied within a Richardson iteration. The key component to the success of the preconditioner is the sparse approximation to the Schur complement based on a pressure space mass matrix scaled by a weighting factor that depends element‐wise on the inverse of a suitable bulk modulus. The accuracy of the method is assessed, making use of well‐known analytical solutions from the literature. Numerical results demonstrate robustness and low computational cost of the fixed‐stress scheme in accurately capturing the two‐way coupling between deformation and pressure. Copyright © 2015 John Wiley & Sons, Ltd.