bluuebunny/crossref_metadata_2025_split huggingface dataset:
The space of vector‐valued integrable functions under certain locally convex topologies
Authors: Maghsoudi Saeid 
Published: October 2012

AbstractLet E be a Banach space, Ω a locally compact space, and μ a positive Radon measure on Ω. In this paper, through extending to Lebesgue‐Bochner spaces, we show that the topology β1 introduced by Singh is a type of strict topology. We then investigate various properties of this locally convex topology. In particular, we show that the strong dual of L1(μ, E) can be identified with a Banach space. We also show that the topology β1 is a metrizable, barrelled or bornological space if and only if Ω is compact. Finally, we consider the generalized group algebra \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$L^1(G, \mathbf {A})$\end{document} under certain natural locally convex topologies. As an application of our results, we prove that \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$L^1(G,\mathbf {A})$\end{document} under the topology β1 is a complete semi‐topological algebra.
Prediction of orthotropic mechanical properties of plain‐weave composites with matrix voids using unit cells at multi‐scales
Authors: Li Hongzhou , Fan Xinyu , Yan Chun 
Published: October 2012

AbstractA numerical procedure for predicting the orthotropic mechanical properties of plain‐weave composites with matrix voids through a combined approach of the representative volume element method and finite element analyses is presented. The representative volume element method was implemented using two unit cells established at different length scales with equation boundary conditions. By considering the presence of randomly scattered voids throughout the matrix induced during the manufacturing process, it was assumed in the simulation that the spatial distribution of matrix voids is completely random. The procedure was exemplified with a glass fiber‐reinforced (plain‐weave fabric) epoxy composite with matrix voids. Sensitivity studies were conducted to quantify the influence of fiber volume fraction and mechanical properties of the constituent phases on the orthotropic mechanical properties of the composite. The numerical procedure, which can be implemented in ABAQUS, is an efficient tool for guiding the design of plain‐weave composites at materials level and also provides effective properties of such composites for the design optimization of engineering structures made of such composite materials. © 2012 Society of Chemical Industry
Synthesis and characterization of phenylsiloxane‐modified bismaleimide/barbituric acid‐based polymers with 3‐aminopropyltriethoxysilane as the coupling agent
Authors: Pham Quoc‐Thai , Hsu Jung‐Mu , Pan Jing‐Pin , Wang Tsung‐Hsiung , Chern Chorng‐Shyan 
Published: October 2012

AbstractThe preparation and characterization of phenylsiloxane (PhSLX)‐modified N,N′‐bismaleimide‐4,4′‐diphenylmethane (BMI)/barbituric acid (BTA) (10/1 mol/mol) oligomers are described. 3‐Aminopropyltriethoxysilane (APTES) was used as the coupling agent. The resultant hybrid BMI/BTA‐APTES‐PhSLX polymers were characterized primarily using thermogravimetric analysis in combination with differential scanning calorimetry and Fourier transform infrared measurements. The thermal stability of the BMI/BTA oligomer was improved significantly by incorporation of a small amount (20–30 wt%) of the copolymer of PhSLX and APTES (PASi). After adequate post‐curing reactions, the PASi‐modified BMI/BTA oligomers (HYBRID20 and HYBRID30 containing 20 and 30 wt% PASi, respectively) exhibited greatly reduced thermal degradation rates in the temperature range 300–800 °C and an increased level of residues at 800 °C as compared to the native BMI/BTA oligomer. This was further confirmed by thermal degradation kinetic studies, in which the activation energies for the thermal degradation reactions of the cured PASi‐modified BMI/BTA oligomers were shown to be higher than that of the pristine BMI/BTA oligomer. © 2012 Society of Chemical Industry
Resonant soft x‐ray scattering and reflectivity study of the phase‐separated structure of thin poly(styrene‐b‐methyl methacrylate) films
Authors: Welch Cynthia F. , Hjelm Rex P. , Mang Joseph T. , Hawley Marilyn E. , Wrobleski Debra A. , Bruce Orler E. , Kortright Jeffrey B. 
Published: October 2012

AbstractCombined soft X‐ray scattering and reflectometry techniques promise analysis of polymer thin film domain structure and composition without resorting to chemical modification or isotopic labeling. This work explores the capabilities of these techniques in polymer films of poly(styrene‐b‐methyl methacrylate) (P(S‐b‐MMA)). The results demonstrate that the techniques give detailed information on the domain structure of thin films using well‐known modeling procedures. Discrepancies were noted between the X‐ray optical parameters that are needed to best fit the reflectivity data to the model and the expected parameters. The sources of these discrepancies are discussed in terms of instrument configuration parameters, sample attributes, and, particularly, anisotropy of the chromophore parameters. The results show that fitting the soft X‐ray reflectivity data is much more sensitive to these X‐ray optical parameters than the soft X‐ray scattering data. Nevertheless, fits to both types of data yield quantitative measures of the polymer film's lamellar morphology that are consistent with each other and with literature values. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2013
Raman spectroscopy of isotopically labeled two‐layer graphene
Authors: Kalbac Martin , Kong Jing , Kavan Ladislav , Dresselhaus Mildred S. 
Published: October 2012

AbstractA detailed understanding of graphene properties both in its neutral and doped states is an important prerequisite for applications of this new material in electronic devices. We used electrochemical doping to study the influence of charge on isotopically labeled two‐layer graphene. No change of the G mode intensity was observed at electrode potentials between −1.5 and 1 V. At high positive electrode potentials (>1 V) we observed enhancement of the G mode intensity due to partial removal of interfering resonant transitions. Hence, we confirmed that in case of absence of the enhancement due to a specific orientation between the two layers the Raman spectroelectrochemistry of non‐stacked two‐layer graphene mimics that of one‐layer graphene.
The role of exciton‐photon coupling in the temporal behaviour of a quantum dot‐photonic crystal microcavity system
Authors: Mehdizadeh Akram , Vala Ali Soltani , Shojaei Saeid , Kalafi Manouchehr 
Published: October 2012

AbstractHere, we study the dynamics features of an experimentally realized system of InAs/GaAs quantum dot‐photonic crystal microcavity coupling. In our calculation, exciton state and cavity modes are obtained by variational method and open source GME code, respectively. The excitons in QD treated as bosons which corresponds to linear regime. Temporal behavior is characterized by the first and second‐order correlation functions. Results show how the emission represents bunching and strong‐weak coupling cross over, as well (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Crystal growth and scintillation properties of Ce, Pr and Eu doped La2.5Lu2.5Ga3O12 single crystals
Authors: Kamada Kei , Ogino Hiraku , Yanagida Takayuki , Yoshikawa Akira 
Published: October 2012

AbstractIn this work, scintillation properties of Ce1%, Pr1%, Eu1% and non‐doped La3‐xLu2+xGa3O12 (LLGG) single crystals were evaluated. At first, in order to investigate single phase region of La3‐xLu2+xGa3O12, crystal growth was carried out for undoped LLGG crystal. After that, Ce1%, Pr1% and Eu1% doped La2.5Lu2.5Ga3O12 crystals were grown by the μ‐PD method. Radioluminescence spectra and photoluminescence decay curve of these crystals ware measured. Energy spectra were collected under 5.5 MeV α‐ray excitation (241Am source) and detected by an PMT R7600U (Hamamatsu) in order to determine light yield. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Optical properties of InGaN/GaN nanocolumns in yellow‐to‐red region
Authors: Naka Joji , Inose Yuta , Kunugita Hideyuki , Ramesh Vadivelu , Kikuchi Akihiko , Kishino Katsumi , Ema Kazuhiro 
Published: October 2012

AbstractThe optical properties of InGaN/GaN multiple‐quantum‐well (MQW) nanocolumns whose emission wavelength is in the yellow‐to‐red region (2.1 ∼ 2.3 eV) have been investigated using time‐resolved photoluminescence (PL) measurements. The analysis of the PL decay curves using a stretched exponential function shows that the radiative and nonradiative rates in the red region are almost the same as those in the yellow region. Long‐lived migrating carriers also contribute the strong PL intensity in the red region. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
The effect of different oxidative growth conditions on the scintillation properties of Ce:Gd3Al3Ga2O12 crystal
Authors: Suzuki Akira , Kurosawa Shunsuke , Pejchal Jan , Babin Vladimir , Fujimoto Yutaka , Yamaji Akihiro , Seki Mafuyu , Futami Yoshisuke , Yokota Yuui , Yubuta Kunio , Shishido Toetsu , Kikuchi Masae , Nikl Martin , Yoshikawa Akira 
Published: October 2012

AbstractCe‐doped Gd3Al3Ga2O12 (Ce:GAGG) crystal shows good scintillation performances, especially high light yield. However, its scintillation decay contains slower components. Such phenomenon is due to the delayed radiative recombination process which is caused by trapping effects in the transport stage of scintillation mechanism. Various defects including oxygen vacancy can give rise to shallow traps in the forbidden gap of the material which can cause such phenomena. To study the influence of such oxygen defects, 0.2‐mol% Ce‐doped GAGG single crystals were grown by Floating Zone method using growth atmosphere with different oxygen concentrations. The optical and scintillation properties of the crystals were examined. The light yield and emission wavelength of these samples did not depend on the oxygen content in the growth atmosphere. On the other hand, scintillation decays of the samples grown under the high oxygen concentrations (100 and 40% oxygen) were faster than that of the sample grown under the lower concentration (20%). Oxygen content in the growth atmosphere thus appears an important parameter in the optimization of the growth process of these materials (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Excitonic Rabi oscillations in self‐assembled quantum dots studied by photon echoes
Authors: Asakura Kenta , Mitsumori Yasuyoshi , Kosaka Hideo , Edamatsu Keiichi , Akahane Kouichi , Yamamoto Naokatsu , Sasaki Masahide , Ohtani Naoki 
Published: October 2012

AbstractWe report the excitonic Rabi oscillations in self assembled quantum dots observed by photon echo spectroscopy. The amplitude of the observed Rabi oscillations increases with the pulse area, which is different from the results of previous reports.A numerical calculation of the Rabi oscillations including the local field effect in a quantum dot well reproduces the experimental oscillations, indicating that the local field effect is one of the important origins of the modification of the Rabi oscillations in quantum dots (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
How large is large: estimating ecologically meaningful isotopic differences in observational studies of wild animals
Authors: Authier Matthieu , Dragon Anne‐Cécile , Cherel Yves , Guinet Christophe 
Published: October 2012

ABSTRACTRATIONALEIn ecological studies of wildlife movements and foraging, bio‐logging and isotopic data are routinely collected and increasingly analyzed in tandem. Such analyses have two shortcomings: (1) small sample size linked with the number of telemetric tags that can be deployed, and (2) the observational nature of isotopic gradients. Wildlife ecologists are thus put in a statistical conundrum known as the small n, large p problem.METHODSUsing shrinkage regression, which directly addresses the issue of accurately estimating effects from sparse data, we studied what counts as a biologically meaningful isotopic difference (a prerequisite to delineate isoscapes) in the southern elephant seal (Mirounga leonina), a large and elusive marine predator.RESULTSSeals foraging in Antarctic waters had a lower carbon isotopic value (by ≈ 2‰) than seals foraging either in the interfrontal zone or on the Kerguelen Plateau. The latter two foraging strategies were indistinguishable on the sole basis of δ13C values with our data.CONCLUSIONSShrinkage regression is a conservative statistical technique that has wide applicability in isotopic ecology to help separate robust biological signals from noise. Copyright © 2012 John Wiley & Sons, Ltd.
Electrospray ionisation mass spectrometry molecular‐level structural characterisation of novel phenoxycarboxylic acid–oligo(3‐hydroxybutyrate) conjugates with potential agricultural applications
Authors: Kwiecień Iwona , Adamus Grażyna , Kowalczuk Marek 
Published: October 2012

RATIONALEDue to the low resistance of forms of pesticides to environmental conditions, agrochemicals frequently do not reach their objective, which may cause environmental pollution. The minimisation of the adverse effects of pesticides requires the development of a system for their long‐term controlled release. In the present work, we report the synthesis and structural studies of novel controlled‐release pesticide–oligo‐3‐hydroxybutyrate systems with potential agricultural applications.METHODSThe novel controlled‐release pesticide–oligo(3‐hydroxybutyrate) systems were obtained via the anionic ring‐opening oligomerisation of (R,S)‐β‐butyrolactone initiated by the potassium salt of selected pesticides. Electrospray ionisation mass spectrometry (ESI‐MSn) analyses in positive‐ion mode, supported by 1H NMR results, were used for the structural characterisation of the obtained conjugates. The presence of the respective pesticides in an unchanged form associated with oligo–3‐hydroxybutyrate chains was confirmed by ESI‐MS/MS experiments performed for selected pesticide–oligo(3‐hydroxybutyrate) ions and by the subsequent investigation of their fragmentation pathways.RESULTSThe structures of the resulting conjugates were established at the molecular level with the aid of ESI‐MSn. The presence of one and two chlorine atoms (derived from MCPA and 2,4‐D pesticides) in the conjugates studied was confirmed by comparison of the calculated and experimental isotopic profiles for the selected ions of the respective conjugates. The fragmentation of the selected ions of the resulting conjugates confirmed that the respective pesticides are covalently bonded with oligo(3‐hydroxybutyrate) through a hydrolysable ester bond.CONCLUSIONSAn analytical method has been developed for the characterisation of new pesticide–oligo(3‐hydroxybutyrate) conjugates. A detailed NMR and MS structural characterisation of the designed controlled‐release system of the pesticides was performed. These results are important in the analysis of designed biodegradable polymeric conjugates with potential agricultural applications. Copyright © 2012 John Wiley & Sons, Ltd.
Hydrogen scrambling in non‐covalent complexes of peptides
Authors: Modzel Maciej , Stefanowicz Piotr , Szewczuk Zbigniew 
Published: October 2012

RATIONALEMass spectrometry analysis combined with hydrogen‐deuterium exchange (HDX‐MS) is arising as a tool for quick analysis of native protein conformation. However, during collision‐induced dissociation (CID) the spatial distribution of deuterium is not always conserved. It is therefore important to find out how hydrogen scrambling occurs – this study concentrates on the possibility of scrambling between amino acid residues spatially close together, but not connected by covalent bonds.METHODSPeptides used in this study were synthesized by Fmoc strategy. Deuteration occurred in ammonia formate solution in D2O. Non‐covalent complexes consisting of a deuterated and a non‐deuterated peptide were analyzed by electrospray ionization (ESI) Fourier transform ion cyclotron resonance (FT‐ICR‐MS) with quadrupole mass filter. Low‐energy CID was used for complex dissociation.RESULTSThe complexes were isolated on a quadrupole and subjected to CID to cause dissociation. The deuterium distribution before and after the dissociation of a non‐covalent complex to its components was measured. The study revealed that no significant scrambling occurred between the constituents of the complexes – the degree of scrambling did not exceed 10%.CONCLUSIONSThe results obtained for the complexes should be similar to those for protein parts spatially close together – hydrogen scrambling between them should be negligible. The knowledge that almost all the scrambling occurs along peptide chains gives a better insight into the mechanism of HDX inside a protein. Copyright © 2012 John Wiley & Sons, Ltd.
Changes in sexual desire and activity during pregnancy among women in Shahroud, Iran
Authors: Babazadeh Raheleh , Mirzaii Khadijeh , Masomi Zahra 
Published: October 2012

AbstractObjectiveTo evaluate women's perception of sexual activity during pregnancy in Shahroud, Iran.MethodsData were gathered during 4 semi‐structured group interviews with 33 pregnant women attending 2 obstetric outpatient clinics of a teaching hospital in Shahroud. The interviewers taped the interviews, coded and categorized their content, and performed a qualitative content analysis.ResultsMost women reported a decrease in sexual desire and frequency of intercourse during pregnancy (69.7% and 81.8%, respectively). Sexual desire, however, increased for 18.2% of the women. Some felt that accepting intercourse prevented spousal infidelity, but 65.2% worried that it might cause injury to the fetus. Only 24.2% received information on the advisability of sexual activity during pregnancy from their physicians or midwives, and the other 75.8% sensed that they should discuss the topic with a professional but were not comfortable starting the conversation.ConclusionAlong with excessive anxiety, insufficient information is the major reason why sexual intercourse is often considered dangerous, and sometimes avoided, during pregnancy in Iran. Healthcare professionals, especially midwives, should educate and counsel women, and reassure them that intercourse is safe in women with healthy pregnancies.
Laparoscopic radiofrequency volumetric thermal ablation of uterine myomas with 12 months of follow‐up
Authors: Robles Rodolfo , Aguirre Vicente A. , Argueta Ana I. , Guerrero Maria R. 
Published: October 2012

AbstractObjectiveTo confirm the results of an earlier study assessing the safety and efficacy of a laparoscopic radiofrequency volumetric thermal ablation (RFVTA) system among women with symptomatic myomas.MethodsIn a prospective study at the Hospital of Francisco Marroquin University, Guatemala City, consecutive premenopausal women with symptomatic myomas seeking uterine‐sparing treatment were enrolled between August 2008 and July 2011. The women were treated by RFVTA. Uterine fibroid symptom and health‐related quality‐of‐life (UFS‐QOL) questionnaires were completed at 0, 3, 6, and 12 months.ResultsAmong 114 women screened, 36 were enrolled (ages 33–51 years), and 35 were followed for 12 months. Symptom severity scores reduced significantly (P < 0.05): baseline (63.3), 3 months (23.1), 6 months (15.4), 12 months (9.6). Health‐related quality‐of‐life scores improved significantly (P < 0.05): baseline (37.3), 3 months (79.9), 6 months (85.1), 12 months (87.7). The mean ± SD difference in uterine volume from baseline (215.2 ± 117.9 cm3) to 12 months (167.0 ± 120.8 cm3) was 48.2 cm3 (95% CI: − 22.8 to 119.2; P = 0.192). Nine adverse events among 8 individuals were minor and unrelated to the procedure.ConclusionRFVTA of fibroids resulted in significantly improved symptom severity and quality‐of‐life scores and provides an outpatient uterine‐sparing option for treatment of myomas.
Self‐reported natural history of recurrent prolapse among women presenting to a tertiary care center
Authors: Johnson Payton , Larson Kindra A. , Hsu Yvonne , Fenner Dee E. , Morgan Daniel , DeLancey John O.L. 
Published: October 2012

AbstractObjectiveTo describe the characteristics of recurrent pelvic organ prolapse (POP).MethodsA convenience sample of patients presenting with recurrent POP symptoms between October 2007 and February 2010 completed questionnaires. The survey focused on timing of recurrence(s), symptoms, and demographics.ResultsNinety‐seven women completed questionnaires. Thirty‐four (35.1%) had undergone multiple prior treatments. Overall, 23 of 76 (30.3%) women had not informed their surgeon of the recurrence. Twenty‐seven of 59 (45.8%) women reported that their symptoms were the same as before treatment, whereas 23 of 59 (39.0%) reported more severe symptoms. POP was considered to be persistent if symptoms returned within 3 months, and recurrent if symptom relief exceeded 3 months. After primary surgery, 28 of 79 (35.4%) cases were considered to be persistent, whereas 51 (64.6%) cases were recurrent. Similar percentages were seen after second and third treatments.ConclusionOverall, 35% of participants experienced early return of symptoms. Almost one‐third of participants had not informed their surgeon of the recurrence, indicating that there may not be an accurate self‐assessment of outcome in the absence of careful follow‐up.
An inflatable ergonomic 3‐chamber fundal pressure belt to assist vaginal delivery
Authors: Acanfora Luisa , Rampon Michela , Filippeschi Marco , Marchi Marco , Montisci Massimo , Viel Guido , Cosmi Erich 
Published: October 2012

AbstractObjectiveTo evaluate whether Baby‐guard—a new medical device with an ergonomic 3‐chamber inflatable abdominal belt—can reduce complications associated with vaginal delivery.MethodsA randomized controlled single‐blind prospective study of 80 pregnant women delivering at term was conducted at San Giuseppe Hospital, Empoli, Italy. In the study group (n = 40), the abdominal belt was inflated to optimal therapeutic pressures. In the control group (n = 40), the abdominal belt was inflated to minimal, non‐therapeutic pressures. Factors relating to maternal, fetal, and labor complications during vaginal delivery were evaluated.ResultsCompared with the control group, women in the study group experienced a lower incidence of perineal and cervical lacerations (P < 0.001); reduced use of the Kristeller maneuver (P < 0.001); shorter duration of the second stage of labor (P < 0.001); less psychologic and physical fatigue (P < 0.001); fewer maternal requests for cesarean delivery during labor (P < 0.001); fewer vacuum extractions (P < 0.01); and fewer cesarean deliveries (P < 0.02). No neonatal intensive care unit admissions were recorded in the study group versus 7 in the control group (P < 0.012).ConclusionUse of the ergonomic 3‐chamber inflatable abdominal belt system reduced the incidence of risks associated with vaginal labor.Clinical trials.gov identifier: NCT01566331.