bluuebunny/crossref_metadata_2025_split huggingface dataset:
Immunodominant semen proteins I: New patterns of sperm proteins related to female immune infertility
Authors: Brazdova Andrea , Vermachova Martina , Zidkova Jarmila , Ulcova-Gallova Zdenka , Peltre Gabriel 
Published: June 2013

Abstract
Infertility affects approximately 10% of couples at reproductive age. Semen constituents may be potential immunogenic structures for women. The aim of our work is to detect and identify sperm proteins interacting with serum IgG antibodies from women with fertility disorders. The biochemical characterization of sperm antigens was performed using one and two dimensional gel electrophoresis, both of which were followed by immunoblotting. The IgG-binding proteins of interest were identified using mass spectrometry. From the serum pool of 30 infertile women, we detected sperm antigens within a relative molecular mass range between 30–80 kDa with an isoelectric point of 4–7. No antigens were detected using the serum pool from 10 fertile women (control group). Heat shock proteins (HSP 70) were identified as major sperm antigens associated with female immune infertility. Additionally, we report for the first time that alpha-enolase is a significant sperm antigen from the serum pool of infertile women. We suggest that the IgG-binding proteins identified in our study are related to immune infertility in the case of certain women with abnormally high levels of IgG antibodies linked to sperm proteins. Our results might be useful in the diagnoses of female immune infertility and may provide potential targets for further therapeutic treatment.
Reflexive rings and their extensions
Authors: Zhao Liang , Zhu Xiaosheng , Gu Qinqin 
Published: June 2013

Abstract
A right ideal I is reflexive if xRy ∈ I implies yRx ∈ I for x, y ∈ R. We shall call a ring R a reflexive ring if aRb = 0 implies bRa = 0 for a, b ∈ R. We study the properties of reflexive rings and related concepts. We first consider basic extensions of reflexive rings. For a reduced iedal I of a ring R, if R/I is reflexive, we show that R is reflexive. We next discuss the reflexivity of some kinds of polynomial rings. For a quasi-Armendariz ring R, it is proved that R is reflexive if and only if R[x] is reflexive if and only if R[x; x
−1] is reflexive. For a right Ore ring R with Q its classical right quotient ring, we show that if R is a reflexive ring then Q is also reflexive. Moreover, we characterize weakly reflexive rings which is a weak form of reflexive rings and investigate its properties. Examples are given to show that weakly reflexive rings need not be semicommutative. It is shown that if R is a semicommutative ring, then R[x] is weakly reflexive.
A completely monotonic function involving the tri- and tetra-gamma functions
Authors: Guo Bai-Ni , Zhao Jiao-Lian , Qi Feng 
Published: June 2013

Abstract
The di-gamma function ψ(x) is defined on (0,∞) by $\psi (x) = \frac{{\Gamma '(x)}}
{{\Gamma (x)}}
$ and ψ
(i)(x) for i ∈ ℕ denote the polygamma functions, where Γ(x) is the classical Euler’s gamma function. In this paper we prove that a function involving the difference between [ψ′(x)]2 + ψ″(x) and a proper fraction of x is completely monotonic on (0,∞).
On the spectrum of the Cesàro operator C
1 on $b\bar v_0 \cap \ell _\infty $
Authors: Tripathy Binod , Saikia Pallavi 
Published: June 2013

Abstract
In this paper we have investigated the spectrum of the Cesàro operator C
1 which is regarded as an operator on the sequence space $b\bar v_0 \cap \ell _\infty $ the space of statistically null bounded variation sequences.
On Lipschitz behaviour of some generalized derivatives
Authors: Bednařík Dušan , Pastor Karel 
Published: June 2013

Abstract
The aim of the present paper is to compare various forms of stable properties of nonsmooth functions at some points. By stable property we mean the Lipschitz property of some generalized derivatives related only to the reference point. Namely we compare Lipschitz behaviour of lower Clarke derivative, lower Dini derivative and calmness of Clarke subdifferential. In this way, we continue our study of λ-stable functions.
Two stage regression model with constraints; admissible second stage parameter estimation
Authors: Kubáček Lubomír 
Published: June 2013

Abstract
If a regression experiment is realized in two stages, then two possibilities can occur in the second stage. Estimates of the first stage parameters either may be corrected by use of second stage measurements or they must stay unchanged. In the latter case, this requirement must be taken into account when estimating the second stage parameters. The situation is a little more complicated when constraints on both groups of parameters are imposed.
Distribution, classification, petrological and related gochemical (SRA) characteristics of a tropical lowland peat dome in the Kota Samarahan-Asajaya area, West Sarawak, Malaysia
Authors: Zulkifley Mohamad , Fatt Ng , Abdullah Wan , Raj John , Paramanathan Param S. , Hashim Roslan , Ashraf Muhammad 
Published: June 2013

AbstractPetrographic studies indicate that lateral variations in the decomposition levels of peat are associated with the predominantly occurring peat macerals. Source Rock Analyzer (SRA) results indicate lateral variation in peat organic matter types from type II to III and back again to type II, occurring laterally within the top 0-m to 0.5-m layer at the basin margin to the midsection and further towards the near-center areas of the peat dome. This variation is most likely caused by a combination of factors: (a) Horizontal zonation and lateral variation of the dominant species of plant assemblages (b) Fibric (marginal) peats and hemic to sapric peats associated with type II organic matter (kerogen). Sample organic matter (coal-equivalent kerogen) typing indicates that the relative abundance of phytoclasts and palynomorphs generally supports the organic matter classification obtained by the SRA method. Lateral variations in the peat organic matter types may support the lateral vegetation variation concept. The classification of peat organic matter types (interpreted from visual analyses of palynological slides) occurring from the basin periphery to the mid-section and further towards the basin center yields organic matter of type II to type III and mixed types II to III (coal kerogen-equivalent), respectively.
Solidification of primary Si in electromagnetically levitated Al-50%Si undercooling melts
Authors: Li Lixin , Li Ming , Wang Huixin , Zhang Liwei 
Published: June 2013

Abstract
By combination of electromagnetic levitation and copper-plate quenching, deep undercooling and non-equilibrium solidification of Al-50%Si melts were realized. Through repeatedly heating and cooling, a maximum undercooling of 310 K was reached. Several different morphologies of primary Si solidified at different undercoolings were found on the quenched surfaces. With increasing of undercooling, the primary Si crystals solidified gradually changed to fine clumpy crystals from coarse faceted dendrites. When the undercooling reached the maximum value of 310 K, the microstructures contained fine granular crystals. The gain size of primary Si was refined significantly.
Hot compression deformation of an Mg–2.54Nd–0.26Zn–0.32Zr alloy
Authors: Liu H. H. , Ning Z. L. , Cao F. Y. , Du J. F. , Sun J. F. 
Published: June 2013

Abstract
The hot compression deformation of an Mg–2.54Nd–0.26Zn–0.32Zr cast alloy was investigated in the 25–400°C temperature range at initial strain rates from 10−4 s−1 to 10−2 s−1. It was found that strain rate has little effect on true stress when the material was compressed below 250°C. Above this temperature, high strain rates resulted in an increased true stress. The average strain rate sensitivity exponent at higher temperature (300–400°C) was determined to be 0.24 and the calculated activation energy was 185 kJ · mol−1, which is higher than that of lattice self diffusion of pure Mg. The constitutive equation was established and the Zener-Hollomon parameter was calculated as a function of peak stress. The microstructure of a sample tested at 300°C was analyzed by optical microscopy.
L'imputabilité des services d'immigration – Comparaison des crises en Norvège, au Danemark et en Allemagne
Authors: Reichersdorfer Johannes , Christensen Tom , Vrangbæk Karsten 
Published: June 2013

L’imputabilité peut être comparée à des mécanismes institutionnalisés obligeant les acteurs à justifier leur action auprès de différentes instances, habilitées à poser des questions et à imposer des sanctions. Dans le présent article, nous analysons différentes « crises » survenues dans les politiques d’immigration en Norvège, au Danemark et en Allemagne dans le cadre d’un cadre descriptif portant sur cinq types d’imputabilité : l’imputabilité politique, administrative, légale, professionnelle et sociale. Les échanges d’information, les débats et les conséquences entre un acteur et une instance sont des éléments déterminants pour comprendre comment l’action politique-administrative est mise en œuvre dans les situations critiques. Premièrement, la dynamique de l’imputabilité met en avant les normes et les valeurs conventionnelles en ce qui concerne la modification des politiques et, deuxièmement, la responsabilité politique formelle ne se traduit pas toujours par des conséquences politiques telles que des démissions de ministres en cas de comportement inapproprié. Les conséquences sont en grande partie déterminées par la façon dont la dynamique de l’imputabilité intervient. Remarques à l’intention des praticiens Les responsables politiques et administratifs, de même que les agents de l’État sont confrontés à plusieurs exigences de la part du grand public et de leurs pairs internes ou externes. Il existe un lien entre les acteurs et les instances, qui est important pour comprendre la façon dont l’administration publique fonctionne. On peut qualifier ce lien de « dynamique de l’imputabilité ». En cas de crise, cette dynamique peut annuler ou maintenir les pratiques et les procédures administratives quotidiennes. Notre cadre d’imputabilité propose un mécanisme systématique permettant d’identifier cinq relations d’imputabilité devant être prises en considération lors des processus de réorganisation ou des initiatives de révision des politiques.
Posterior tracheal wall leading to life-threatening obstruction of tracheostomy tube
Authors: Singhal Sanjay , Kiran S , Das Avinash 
Published: June 2013

AbstractThis is a case report of a 28-year-old male patient with severe traumatic brain injury and Glasgow coma scale score = 8: E2 M5 V T , who required a tracheotomy for airway protection. On day 5, a surgical tracheotomy was performed with size 8 tracheotomy tube (TT). On the 4 th day of post-tracheostomy, he developed a sudden onset respiratory distress while on T-piece. Immediate fiber optic bronchoscopy revealed almost a complete closure of TT due to posterior tracheal wall indrawing into the TT with every inspiratory effort.
Hédi Bouraoui ou le discours identitaire transfrontalier
Authors: Slimani Noureddine 
Published: June 2013

L’écriture d’Hédi Bouraoui est le lieu d’exercice d’une praxis littéraire qui se
définit en termes d’écart et d’écartèlement : écart de langage, novateur et décalé ;
écartèlement entre une diversité d’espaces et de cultures. La dynamique transculturelle qui
fonde l’écriture bouraouienne s’articule dans une logique d’additionnement des cultures. Le
questionnement porte sur l’identité, ou plutôt les identités, que charrie chaque personne en
situation de nomadisme. L’écriture devient le lieu d’expression d’une attitude
critico-créatrice dont la visée ultime est de se repositionner dans l’échiquier des
catégorisations institutionnelles. L’appellation d’« écrivain migrant » devient par
conséquent contestable. La vision identitaire qui en résulte est celle d’une appartenance
multiple, ouverte, transfrontalière.
Thermally Switched Release from Nanoparticle Colloidosomes
Authors: Zhou Shaobing , Fan Jing , Datta Sujit S. , Guo Ming , Guo Xing , Weitz David A. 
Published: June 2013

AbstractNanoparticle colloidosomes, whose release can be switched on and off in response to a temperature change, are fabricated. Unlike in other systems, the switchable release does not require the colloidosome shell to deform; it instead occurs due to the adsorption or desorption of a block copolymer, dissolved in the core, at the inner surface of the colloidosome shell, concomitantly blocking or unblocking the pores in the shell. The colloidosomes are prepared using double emulsion templates produced by microfluidics, and are thus highly monodisperse; moreover, they are mechanically stable and consist of biocompatible components, making them suitable for the encapsulation, delivery, and release of a broad range of active materials.
Thermal and mechanical properties of PES/PTFE composites and nanocomposites
Authors: Righetti Maria Cristina , Boggioni Alessia , Laus Michele , Antonioli Diego , Sparnacci Katia , Boarino Luca 
Published: June 2013

ABSTRACTPolyethersulphone/polytetrafluoroethylene (PES/PTFE) nanocomposites and composites were prepared by precipitation of PES into a PTFE latex‐containing nanoparticles. Different samples were obtained by varying the relative ratio between PES and PTFE. The complex crystallization process, discussed within the fractionated crystallization frame, allowed to identify and quantify different dispersion degree of the PTFE nanoparticles within the PES matrix. The different samples were thus divided into nanocomposite and composites. The effect of crystalline PTFE domains on the mobility of PES was investigated and discussed. The dynamic‐mechanical behavior was explained in terms of the particle aggregation state. The mechanical properties of the PES/PTFE composites were found to depend on both the dispersion and the concentration of the PTFE nanoparticles. In the glassy state the stiffness of the materials was found to increase with the dispersion degree, resulting higher for the nanocomposite with respect to composites. On the contrary, in the rubbery state the modulus was found proportional to the PTFE nanoparticles concentration, resulting higher in the composites with respect to the nanocomposite. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3624–3633, 2013
Effects of dihydrogen phosphate intercalated layered double hydroxides on the crystal behaviors and flammability of polypropylene
Authors: Liu Xishan , Gu Xiaoyu , Zhang Sheng , Jiang Yu , Sun Jun , Dong Mingzhe 
Published: June 2013

ABSTRACTMg‐Al‐H2PO4– layered double hydroxides (LDHs) was prepared by anion exchange method, and polypropylene (PP)‐LDH composites were prepared by melt compounding. The dispersion of LDH in PP matrix was characterized by Transmission electron microscope and X‐ray diffraction (XRD), and the results showed that both exfoliation structures and aggregation structures can be found in the composites. The effects of LDH on the crystal behaviors of PP was investigated by XRD and Differential scanning calorimetry (DSC), and it indicated that LDH can induce the formation of β crystal and serve as a heterogeneous nucleating agent in PP. The significant decrease of both the crystallization and the melting enthalpy (ΔHc and ΔHm) was observed in PP composite at the presence of LDH platelets. Both the peak heat release rate and total heat release (THR) were significantly decreased after the addition of treated LDH. The possible chemical structural change in the condensed phase of PP composite during heating was studied by Fourier transform infrared spectroscopy (FT‐IR). The mechanism of modified LDH in improving the fire performance of PP and the possible relationship between flame retardancy and crystal behavior have been proposed and discussed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3645–3651, 2013
Evaluation of water uptake and mechanical properties of biomedical polymers
Authors: Vidović Elvira , Klee Doris , Höcker Hartwig 
Published: June 2013

ABSTRACTPoly(vinyl alcohol) grafted with poly(d,l‐lactide) or poly(d,l‐lactide‐co‐glycolide) oligomers, were synthesized in our laboratory and investigated with respect to their potential for tissue engineering applications. In order to understand their structure–properties relationships the effect of length and composition as well as number of polyester grafts on PVA backbone chain on water uptake capability and hydrophilicity/hydrophobicity balance and on mechanical properties of hydrogels was evaluated. The E moduli of hydrogels display values between 0.01 and 100 MPa. The results indicate the route for the development of polymers with a very broad range of properties similar to those of natural cartilage tissue. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3682–3688, 2013
A Class of Cross‐Layer Optimization Design for Congestion and Energy Efficiency with Compressed Sensing in Wireless Sensing Networks
Authors: Li Mingwei , Jing Yuanwei , Li Chengtie 
Published: June 2013

AbstractIn wireless sensor networks (WSNs), the congestion problem not only causes packet loss, but also leads to an increase in delays and energy consumption. The actual performance of wireless sensor networks (WSNs) can be severely influenced by the quality of the communication channel and the bit in transmission. In this paper, the distributed protocols, which attain global optimum control for signals by the compressed sensing technique and achieve fair channel allocation by the scheduling algorithm, are proposed for WSNs. We take into account the congestion problem by robust optimization with congestion ratio for two classic aspects in energy limited WSNs: minimum transmission rate and maximum transmitted information. To achieve the goal, three protocols are developed. In the first protocol, the desired control input is designed based on the compressed sensing technique. A minimal bit of signal is provided to reduce the transmission flow for the congestion model. The second protocol is resource allocation. The resources can be allocated increasingly to the channel in order to avoid more severe congestion. This can also avoid conservative reduction of resource allocation for eliminating congestion. Channel selection abides by the fair resource allocation principle. The above protocols separately are implemented through a congestion ratio at network layer, transport layer, and MAC layer. Simulation results demonstrate that the proposed algorithm effectively relieves congestion, and achieves higher throughput and lower energy consumption.
Playing through Pain: Children and Young People's Experiences of Physical Aggression and Violence in Sport
Authors: Stafford Anne , Alexander Kate , Fry Deborah 
Published: June 2013

While there has been some focus on physical abuse in the general child abuse literature, there have been few studies examining the physical abuse of children in sport. This article focuses mainly on peer physical harm in sport. However, we argue that to fully understand physical harm between young people in sport requires understanding: (1) the ‘sporting ethos’ prevalent in sport where training and competing to the limits of physicality are part of the culture; and (2) the physical harm that occurs between coaches and young people as a context for understanding physical harm between young people. Results are based on a convenience sample of 6124 young people (age 18–22) who completed an online survey about their experiences of participating in sport as children; 89 follow‐up interviews were conducted with a sub‐set of these young people. Findings suggest that in sport, where training and competing to the limits of physicality are inherent to sporting achievement, physical harm is common and takes on a different form to physical harm of children in other settings. Copyright © 2013 John Wiley & Sons, Ltd.‘Results are based on a convenience sample of 6124 young people’Key Practitioner Messages

Sport practitioners and sport bodies should put in place policies, procedures, training and practice which enable adults to systematically tackle harm occurring in sport settings including between peers.
Practitioners involved in working with children and young people in sport settings should take steps to promote a more positive sporting and coaching ethos and build upon what children and young people value about sport participation.
A Brief Overview of Some Physical Studies on the Relaxation Dynamics and Förster Resonance Energy Transfer of Semiconductor Quantum Dots
Authors: Sadhu Suparna , Patra Amitava 
Published: June 2013

AbstractThis article highlights some physical studies on the relaxation dynamics and Förster resonance energy transfer (FRET) of semiconductor quantum dots (QDs) and the way these phenomena change with size, shape, and composition of the QDs. The understanding of the excited‐state dynamics of photoexcited QDs is essential for technological applications such as efficient solar energy conversion, light‐emitting diodes, and photovoltaic cells. Here, our emphasis is directed at describing the influence of size, shape, and composition of the QDs on their different relaxation processes, that is, radiative relaxation rate, nonradiative relaxation rate, and number of trap states. A stochastic model of carrier relaxation dynamics in semiconductor QDs was proposed to correlate with the experimental results. Many recent studies reveal that the energy transfer between the QDs and a dye is a FRET process, as established from 1/d6 distance dependence. QD‐based energy‐transfer processes have been used in applications such as luminescence tagging, imaging, sensors, and light harvesting. Thus, the understanding of the interaction between the excited state of the QD and the dye molecule and quantitative estimation of the number of dye molecules attached to the surface of the QD by using a kinetic model is important. Here, we highlight the influence of size, shape, and composition of QDs on the kinetics of energy transfer. Interesting findings reveal that QD‐based energy‐transfer processes offer exciting opportunities for future applications. Finally, a tentative outlook on future developments in this research field is given.
Nearly Monodispersed LiNbO3 Nanocrystals Synthesized by a Nonaqueous Sol–Gel Process and Their Photocatalytic H2 Evolution Activities
Authors: Feng Jianyong , Wang Zhiqiang , Wang Jiajia , Wan Lijuan , Yan Shicheng , Li Zhaosheng , Zou Zhigang 
Published: June 2013

AbstractPhase‐pure and nearly monodispersed LiNbO3 nanocrystals are obtained by a nonaqueous sol–gel process, in which the reaction degrees of the precursors [LiNO3 and Nb(OEt)5] are precisely controlled to match each other. The concentration of hydrogen‐related defects affects the H2 evolution activities of the LiNbO3 nanocrystals.