Miracle-dz/UniFAR-FTUs huggingface dataset:
Hole-polaron formation in the two-dimensional Holstein t-J model: A variational Lanczos study.

Polaronic features of dopant-induced charge carriers are manifest in recent experiments on La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4+{ital y}} and La{sub 2{minus}{ital x}}Ni{sub {ital x}}CuO{sub 4+{ital y}}. To study the formation of hole (bi)polarons in such systems exhibiting strong Coulomb interactions, the Holstein {ital t}-{ital J} model is examined by means of a variational diagonalization technqiue for a wide range of phonon frequencies and electron-phonon (EP) couplings on finite square lattices, up to 18 effective sites in size. Including static displacement field, polaron, and squeezing effects, our approach allows for the description of nearly free polarons in the weak-coupling limit as well as for adiabatic Holstein polarons and nonadiabatic Lang-Firsov polarons in the case of strong EP interactions. At low doping levels and low phonon frequencies we demonstrate that antiferromagnetic spin correlations and EP interactions reinforce each other to the effect of lowering the threshold for polaronic self-localization in a strongly distorted lattice. This is contrasted with the nonadiabatic regime, where we observe the formation of Lang-Firsov polarons with moderate polaronic mass enhancement in a nearly undistorted lattice. In the case of two doped holes, the hole binding energy is analyzed in detail and we find that hole binding ismore » enhanced as a dynamical (static) effect of a rather weak (extremely strong) EP interaction for delocalized (self-trapped) polarons. At quarter-filling we notice, in the adiabatic regime, a sequence of transitions as the EP coupling increases from nearly free mobile polarons to a polaronic superlattice and finally to a charge-separated state. The ordering of polarons disappears at higher phonon frequencies. « less
Postpartum infection treatments: a review

Upper genital tract infections are the most common complications of the puerperium. Less frequent complications are mastitis and septic pelvic thrombophlebitis. Several risk factors including obstetrical, gynaecological, demographic and surgical, are associated with an increased rate of postpartum endometritis and their influence is higher after a caesarean than vaginal delivery. Postpartum endometritis rate range from 15 to 35%. Their identification should be prioritised to prevent this complication. The vaginal flora plays a central role in the development of endometritis. Prophylactic antibiotic treatment at the time of caesarean delivery has helped reduce the rate of postpartum endometritis. When endometritis has been identified and cultures from the genital tract obtained, empirical therapy should be instituted until culture results are available and only then, if needed, therapy changed according to the microorganism’s sensitivity. The use of penicillins, cephalosporins, aminoglycosides, metronidazole, macrolides, β-lactamases inhibitors and quinolones has been reviewed. Various available therapies for endometritis and the experience and results of several authors were analysed. Cost-effectiveness is one of the most important aspects in the decision making process in searching for the best therapy. The monitoring of infection rates within each institution to determine the effectiveness of the prophylactic agent to be used is imperative; it would reduce costs and at the same time, provide the best adequate therapy. After reviewing all the aspects of the different therapies used in case of postpartum endometritis, it may be concluded that the combination of clindamycin and gentamicin is preferred as it can be administered once-daily, and is also the least expensive. Other issues to be taken into account are the number of daily doses and duration of therapy, factors that affect patients compliance and cost of hospitalisation.
The effects of RNA interference mediated VEGF gene silencing on biological behavior of renal cell carcinoma and transplanted renal tumor in nude mice.

OBJECTIVE This study was to explore the effects of RNA interference mediated vascular endothelial growth factor (VEGF) gene silencing on biological behavior of renal cell carcinoma (RCC), transplanted renal tumor and angiogenesis in nude mice. METHODS The specific siRNA sequence targeting VEGF were designed and synthesized to construct hVEGF-siRNA plasmid which was transfected into RCC 786-O cells. Reverse transcriptase-polymerase chain reaction (RT-PCR) was used for the detection of VEGF gene expression and western blot was adopted for the examination of VEGF protein expression. The 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to detect cell growth as well as cell migration and invasion. The transplanted renal tumor models in nude mice were established, and the growth condition of nude mice, and VEGF protein expression in transplanted tumor slices and the microvessel density (MVD) were detected. RESULTS The expression level of VEGF mRNA in VEGF-siRNA group was significant lower than that in the control group and negative group, suggesting that establishment of plasmid specifically inhibited the expression of VEGF gene The expression level of VEGF protein in VEGF-siRNA group was significant lower than that in the control group and negative group. VEGF gene silencing has the significant inhibition effects on proliferation, migration and invasion of RCC 786-O cells. The tumor weight, VEGF protein positive rate and MVD in VEGF-siRNA group were significant lower than those in negative group and blank group. CONCLUSION The VEGF gene silencing could inhibit the cell proliferation, migration and invasion of RCC 786-O cells; inhibition of VEGF protein expression could prevent transplanted RCC growth and tumor angiogenesis.
Redifferentiation of dedifferentiated bovine articular chondrocytes in alginate culture under low oxygen tension.

OBJECTIVE To determine the influence of low oxygen tension on the redifferentiation and matrix production of dedifferentiated articular chondrocytes in monolayer and alginate bead culture. METHODS Bovine articular chondrocytes were isolated enzymatically. After multiplication and dedifferentiation in a 2-week monolayer culture under 21% oxygen, the cells were subcultured in monolayer or alginate bead culture and subjected to 21% or 5% O(2)for 2 or 3 weeks in order to redifferentiate. Controls consisted of primary cultures in alginate. Matrix production was monitored immunocytochemically [collagen types I, II, IX, and GAGs (keratan sulfate, chondroitin-4- and -6-sulfate)] and collagen type II additionally assayed by Western blotting. Biosynthetic activity was measured by [(3)H]-proline incorporation and cell-viability by the trypan blue exclusion method. RESULTS The cell number increased more than four-fold during dedifferentiation. Collagen type II was not produced by dedifferentiated chondrocytes under 5% or 21% oxygen in the monolayers or under 21% in alginate. However, dedifferentiated cells in alginate subjected to 5% oxygen exhibited a strong collagen type II expression indicating a redifferentiation. Additionally, collagen type IX and GAGs were also higher and [(3)H]-proline incorporation increased significantly. Primary cultures in alginate displayed a stronger collagen type II expression under 5% but no significant differences for other extracellular matrix components, or [(3)H]-proline incorporation. Viability was approximately 90% for all alginate cultures. CONCLUSION A combination of alginate and high oxygen tension might not be suitable for redifferentiation or culturing of dedifferentiated chondrocytes. However, low oxygen tension promotes or induces a redifferentiation of dedifferentiated cells in alginate, stimulates their biosynthetic activity, and increases collagen type II production in primary alginate cultures.
0 Polymer Rheology by Dielectric Spectroscopy

The aim of this chapter is to discuss the main models describing the polymer dynamics at macroscopic scale and present some of the experimental techniques that permit to test these models. We will notably show how Broadband Dielectric Spectroscopy (BDS) permits to obtain rheological information about polymers, i.e. permits to understand how the matter flows and moves. We will focus our study the whole chain motion of cis-polyisoprene 1,4 (PI).
Characterization of Actinobacillus pleuropneumoniae riboflavin biosynthesis genes

In this paper, we report the identification, cloning, and complete nucleotide sequence of four genes from Actinobacillus pleuropneumoniae that are involved in riboflavin biosynthesis. The cloned genes can specify production of large amounts of riboflavin in Escherichia coli, can complement several defined genetic mutations in riboflavin biosynthesis in E. coli, and are homologous to riboflavin biosynthetic genes from E. coli, Haemophilus influenzae, and Bacillus subtilis. The genes have been designated A. pleuropneumoniae ribGBAH because of their similarity in both sequence and arrangement to the B. subtilis ribGBAH operon.
Optimal dimensioning and operation of a grid-supporting energy storage system

Energy storage systems could offer a new solution for overcoming the power-overloading problem on power grids. This paper presents a method for the optimal dimensioning and operation of a grid-supporting storage system, which could be applied in a 110 kV high voltage grid in Germany, in order to minimize the grid expansion. An algorithm optimizing the behavior of a controlled storage system connected to on one of the substations of the grid will be introduced in this paper. This algorithm describes a linear optimization problem, which depending on the measured residual load on the substations and the power flow on the connected lines, finds the minimally required rated capacity and power of the storage system that ensure a safe operation of the grid. In a further step, the resulted sizing parameters of the storage system have been appended as further constraints of the optimization problem in order to determine the optimal operation mode of the storage system over time. By means of time-series based load flow calculations on a test system, the contribution of the optimized dimensioning and operation of the energy storage system to the reduction of the power grid overload has been verified.
Enrichment of Immediate-Early 1 (m123/pp89) Peptide-Specific CD8 T Cells in a Pulmonary CD62Llo Memory-Effector Cell Pool during Latent Murine Cytomegalovirus Infection of the Lungs

ABSTRACT Interstitial cytomegalovirus (CMV) pneumonia is a clinically relevant complication in recipients of bone marrow transplantation (BMT). Recent data for a model of experimental syngeneic BMT and concomitant infection of BALB/c mice with murine CMV (mCMV) have documented the persistence of tissue-resident CD8 T cells after clearance of productive infection of the lungs (J. Podlech, R. Holtappels, M.-F. Pahl-Seibert, H.-P. Steffens, and M. J. Reddehase, J. Virol. 74:7496–7507, 2000). It was proposed that these cells represent antiviral “standby” memory cells whose functional role might be to help prevent reactivation of latent virus. The pool of pulmonary CD8 T cells was composed of two subsets defined by the T-cell activation marker L-selectin (CD62L): a CD62Lhi subset of quiescent memory cells, and a CD62Llo subset of recently resensitized memory-effector cells. In this study, we have continued this line of investigation by quantitating CD8 T cells specific for the three currently published antigenic peptides of mCMV: peptide YPHFMPTNL processed from the immediate-early protein IE1 (pp89), and peptides YGPSLYRRF and AYAGLFTPL, derived from the early proteins m04 (gp34) and M84 (p65), respectively. IE1-specific CD8 T cells dominated in acute-phase pulmonary infiltrates and were selectively enriched in latently infected lungs. Notably, most IE1-specific CD8 T cells were found to belong to the CD62Llo subset representing memory-effector cells. This finding is in accordance with the interpretation that IE1-specific CD8 T cells are frequently resensitized during latent infection of the lungs and may thus be involved in the maintenance of mCMV latency.
Validity and reliability of the Persian version of mobile phone addiction scale

Background: With regard to large number of mobile users especially among college students in Iran, addiction to mobile phone is attracting increasing concern. There is an urgent need for reliable and valid instrument to measure this phenomenon. This study examines validity and reliability of the Persian version of mobile phone addiction scale (MPAIS) in college students. Materials and Methods: this methodological study was down in Isfahan University of Medical Sciences. One thousand one hundred and eighty students were selected by convenience sampling. The English version of the MPAI questionnaire was translated into Persian with the approach of Jones et al. (Challenges in language, culture, and modality: Translating English measures into American Sign Language. Nurs Res 2006; 55: 75-81). Its reliability was tested by Cronbach's alpha and its dimensionality validity was evaluated using Pearson correlation coefficients with other measures of mobile phone use and IAT. Construct validity was evaluated using Exploratory subscale analysis. Results: Cronbach's alpha of 0.86 was obtained for total PMPAS, for subscale1 (eight items) was 0.84, for subscale 2 (five items) was 0.81 and for subscale 3 (two items) was 0.77. There were significantly positive correlations between the score of PMPAS and IAT (r = 0.453, P < 0.001) and other measures of mobile phone use. Principal component subscale analysis yielded a three-subscale structure including: inability to control craving; feeling anxious and lost; mood improvement accounted for 60.57% of total variance. The results of discriminate validity showed that all the item's correlations with related subscale were greater than 0.5 and correlations with unrelated subscale were less than 0.5. Conclusion: Considering lack of a valid and reliable questionnaire for measuring addiction to the mobile phone, PMPAS could be a suitable instrument for measuring mobile phone addiction in future research.
Algorithm for Enhancement of Biometric Images Used in Feature Extraction and Authentication

Biometrics refers to technologies for measuring and analysing a individual's physiological or behavioural characteristics which are unique to persons hence can be used to identify a person. For the successful identification the input image should have the fine qualities to produce a perfect output. Improvement of overall quality of the image is important when various factors are taken into account. This paper proposes an algorithm that can be used in the processing and improvement of biometric images. The paper is organized into 3 sections. Section1: introduction of biometric images and need for processing of biometric images section2: the proposed Algorithm for improvement and processing of biometric images Section3: experimental results and conclusion
Sex- and age-specific incidence of healthcare-register-recorded eating disorders in the complete swedish 1979-2001 birth cohort.

OBJECTIVE To investigate the sex- and age-specific incidence of healthcare-register-recorded anorexia nervosa (AN) and other eating disorders (OED) in a complete birth cohort, and assess whether incidence varies by diagnostic period and (sub-) birth cohort. METHOD We used the actuarial method and Poisson models to examine the incidence of AN and OED from 1987 to 2009 (when individuals were 8-30 years old) for a cohort of 2.3 million individuals (48.7% female) born from 1979 to 2001 in Sweden, identified using Swedish registers. RESULTS For both sexes, incidences of AN and OED increased considerably for diagnostic periods after 2000, but differed little by birth cohort. In 2009, AN incidence in the peak age category was 205.9 cases/100,000 persons (95% CI: 178.2, 233.5) for females (14-15 years), versus 12.8 cases/100,000 (95% CI: 5.6, 20.1) for males (12-13 years). OED incidence in the peak age category was 372.1 cases/100,000 (95% CI: 336.4, 407.9) for females (16-17 years), versus 22.2 cases/100,000 (95% CI: 13.3, 31.1) for males (14-15 years). DISCUSSION Our finding of an increase in healthcare-register-recorded eating disorders for diagnostic periods after 2000 likely reflects improved detection and expanded register coverage in Sweden. The peak of eating disorder incidence in adolescence, which began unexpectedly early for AN in males, suggests the importance of vigilance for signs of AN in young boys and early primary prevention efforts. Waiting until later could miss critical windows for intervention that could prevent disorders from taking root.
The 2nd to 4th digit ratio and autism

It has been suggested that autism may arise as the result of exposure to high concentrations of prenatal testosterone. There is evidence that the ratio of the lengths of the 2nd and 4th digit (2D:4D) may be negatively correlated with prenatal testosterone. We measured 2D:4D in 95 families recruited via the National Autistic Society, UK. The sample comprised a total 72 children with autism (62 males, 10 females; age range 2 to 14 years), including 23 children (20 males, three females) with Asperger syndrome(AS), 34 siblings, 88 fathers, 88 mothers and sex‐ and age‐matched control participants. We found that the 2D:4D ratios of children with autism, their siblings, fathers and mothers were lower than population normative values. Children with AS, who share the social and communicative symptoms of autism but have normal or even high IQ, had higher 2D:4D ratios than children with autism but lower ratios than population normative values. There were positive associations between 2D:4D ratios of children with autism and the ratios of their relatives. Children with autism had lower than expected 2D:4D ratios and children with AS higher ratios than expected in relation to their fathers’2D:4D ratio. It was concluded that 2D:4D ratio may be a possible marker for autism which could implicate prenatal testosterone in its aetiology.
Linear flexo-electro-optic effect in a hybrid aligned nematic liquid crystal cell

A hybrid aligned nematic liquid crystal sample presents a bulk flexo-electric polarization P. The coupling of P with an external electric field normal to the bounding plates allows, for weak anchoring, a texture distortion. We report a new linear flexo-electro-optic effect in such a cell with a weak anchoring, which presents an electrically controlled birefringence. The results also indicate that the sin2 θs form of the surface anchoring energy is inadequate when the surface angle θ s is large. Low voltage screening by counterions is also discussed.
A Multi-Label Classification Method on Chinese Temporal Expressions Based on Character Embedding

Understanding temporal expressions is the important foundation of many NLP tasks. However, the varied representations of temporal expressions is difficulty in analysis and understanding. To parsing expressions, an effective classification method of temporal expressions is significant. A temporal expression may belong to one or more classes, but the classification usually requires manual annotation characteristics. In this paper, we present a character embedding feature method based on distributed word representation and a multi-label classification method based on neural network. The Chinese temporal expressions can be classified automatically by their characteristics. Experiments on TempEval-2 datasets show that our method has achieved good performance.
Reliability Analysis of Phasor Measurement Unit Considering Data Uncertainty

This paper proposes a combined statistical and fuzzy Markov method for reliability evaluation of phasor measurement unit (PMU). The major purpose is to deal with uncertainties of reliability data in PMU. The membership functions of reliability parameters can be built based on statistics and fuzzy set theory. The fuzzy hierarchical Markov models are presented to quantify membership functions of multiple reliability indices of the entire PMU. A fuzzy sensitivity analysis index is developed to estimate the effects of parameter uncertainties on the uncertainty of PMU reliability and identify the most sensitive component(s). Numerical results are provided to demonstrate the effectiveness of the proposed techniques.
Investigation into the effects of varying frequency of mechanical stimulation in a cycle‐by‐cycle manner on engineered cardiac construct function

Mechanical stimulation has been used extensively to improve the function of cardiac engineered tissue, as it mimics the physical environment in which the tissue is situated during normal development. However, previous mechanical stimulation has been carried out under a constant frequency that more closely resembles a diseased heart. The goal of this study was to create a bioreactor system that would allow us to control the mechanical stimulation of engineered cardiac tissue on a cycle‐by‐cycle basis. This unique system allows us to determine the effects on cardiac construct function of introducing variability to the mechanical stretch. To test our bioreactor system, constructs created from neonatal rat cardiomyocytes entrapped in fibrin hydrogels were stimulated under various regimes for 2 weeks and then assessed for functional outcomes. No differences were observed in the final cell number in each condition, indicating that variability in frequency did not have a negative effect on viability. The forces were higher for all mechanical stimulation groups compared to static controls, although no differences were observed between the mechanically stimulated conditions, indicating that variable frequency on a cycle‐by‐cycle basis has limited effects on the resulting force. Although differences in the observed twitch force were not observed, differences in the protein expression indicate that variable‐frequency mechanical stimulation had an effect on cell–cell coupling and growth pathway activation in the constructs. Thus, this bioreactor system provides a valuable tool for further development and optimization of engineered myocardial tissue as a repair or replacement strategy for patients undergoing heart failure. Copyright © 2014 John Wiley & Sons, Ltd.
Diaquabis[2-(4-bromophenyl)acetato]bis(N 4,N 4-dimethylpyridin-4-amine)copper(II)

In the title compound, [Cu(C8H6BrO2)2(C7H10N2)2(H2O)2], the CuII atom (site symmetry ) adopts a Jahn–Teller-distorted trans-CuN2O4 octahedral coordination, with the aqua O atoms in axially extended sites. An intramolecular O—H⋯O hydrogen bond helps to establish the conformation and an intermolecular O—H⋯O hydrogen bond is seen in the crystal packing.
Indirect Localization and Imaging of Objects in an UWB Sensor Network

A method for the localization and the rough 2-D microwave imaging of objects is described. It detects and utilizes line-of-sight (LOS) paths between a mobile node and several fixed nodes of a distributed ultrawideband (UWB) sensor network. Objects are imaged in an indirect way, i.e., by a combination of maps, which show the distribution of LOS paths of individual network nodes. The method is demonstrated by means of ray-tracing simulations and measurements in a realistic environment. Performance limitation by diffraction and the question of temporal network node synchronization are discussed.