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Metallic Ferromagnetism in the 3D Hubbard Model at Finite Temperature
Andr´e Neves Ribeiro,Claudio Andrade Macedo 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10
The goal of this work is to examine the possibility of ferromagnetism in a three-dimensional lattice using the Hubbard model with only nearest-neighbor hopping and finite on-site Coulomb interaction (U) and temperature (T) when solved using the dynamical mean-field approximation (DMFA). We calculated the density of states for an fcc lattice with n = 0.6, 0.7 and 0.8, at T = 0.04 t/kB, and with U = 3W where W denotes the non-interacting energy bandwidth. The results reveal magnetization that is nearly saturated and indicate that these systems are metallic. In the particular case where n = 0.6, the magnetization, internal energy and specific-heat versus temperature curves were calculated.
Andrés Díaz-Gomez,Mytzy Godoy,María Elizabeth Berrio,Jesús Ramirez,Andrés Felipe Jaramillo,Carlos Medina,Mary Montaño,Manuel Francisco Meléndrez 한국섬유공학회 2022 Fibers and polymers Vol.23 No.7
In this study, a polymerized polyurethane foam was formulated from tannins extracted from Pinus radiata aspolyol, and copper oxide nanoparticles (CuO-NPs) at a concentration of 2 % w/w as a nucleating agent. This produced areinforced foam with better mechanical properties and fire resistance. The impact of the addition of CuO-NPs on themechanical and thermal properties of the tannin foam was also studied. The properties studied were foaming process, foamdensity, cell morphology, flammability and thermal conductivity. The results revealed that the CuO-NPs incorporated in thefoam formulation act as nucleation centers, which decrease the pore size, strengthen the cell walls, and improve mechanicalproperties. The tannin samples showed good thermal resistance performance with a limit oxygen index (LOI) higher than21 %. The results obtained were contrasted with two foams, a commercial foam (SoudaFoam) and a foam generated with thesame dissociate, but with a commercial polyol (LHT-112). The foam with NPs had an elastic modulus of 3.7 MPa and stress(max) of 1.13 MPa, which was higher than those of the foams used as controls.
André Moreira Cunha,Andrés Ferrari 한국 포르투갈-브라질 학회 2009 포르투갈-브라질 연구 Vol.6 No.2
Este trabalho procura comparar as estratégias recentes de desenvolvimento de Brasil e Coréia do Sul, considerando suas experiências no período que se seguiu ao término da Segunda Grande Guerra Mundial, quando ambos se tornaram nações industrializadas. Procura‐se enfatizar os últimos quinze anos, que têm sido caracterizados, dentre outras coisas: (i) a conformação de uma nova ordem internacional, econômica e política, onde o unilateralismo do imediato pós‐guerra fria se transformou em um ambiente muito mais complexo; (ii) a emergência de novas potências, especialmente a China; (iii) uma crescente instabilidade financeira; e (iv) a decadência das estratégias nacionais inspiradas no Consenso de Washington.
It Happened One Night, the Great Depression and Exodus Politics
André,e Lafontaine 한국아메리카학회 2016 美國學論集 Vol.48 No.3
One of the biggest movies of 1934 was Frank Capra’s It Happened One Night. Off to a slow start in urban locations, the movie gradually picked up speed as it trickled down to rural venues where it presumably was met by audiences who shared its core values. The movie’s attraction has long been explained by the utopian a melting of social classes it presents. Rather than a classless society, I argue that It Happened One Night explicitly enacts the romance of a woman’s downward mobility and, perhaps more significantly, a control of her (dangerous) mobility through domestic enclosure. In this paper, I argue for a renewed reading of Capra’s It Happened One Night in light of Michael Walzer’s concept of “Exodus politics” focusing on gender. I start with a short discussion of Walzer’s influential concept, to follow with an in-depth look at the metaphor as it operates in the film. I finish by suggesting that “Exodus politics” helped in solidifying both a male and a female audience in the context of the Great Depression.
Andrés Correa-Valderrama,Willy Stangl-Herrera,Andrés Echeverry-Vélez,Erika Cantor,Tamy Ron-Translateur,Julio Cesar Palacio-Villegas 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.2
Background: The goal of this study was to evaluate the relationship between body mass index (BMI) and early complications of total hip replacement (THR) and total knee replacement (TKR). Methods: This is a retrospective study of patients who underwent primary THR and TKR between January 2011 and December 2015. We included patients between 18 and 90 years of age with BMI less than 40 kg/m2 with a minimal postoperative follow-up time of 45 days. The primary outcomes were the presence of infection, mechanical complications (dislocation, fractures, arthrofibrosis, or neuropraxia), and thromboembolic events. Overweight and obesity were defined as a BMI of 25–29.9 kg/m2 and ≥ 30 kg/m2, respectively. Results: In total 750 patients were included (THR, 268; TKR, 482) with a mean age of 65.0 ± 12.4 years. The percentage of patients with normal weight, overweight, and obesity was 24.9% (n = 187), 41.7% (n = 313), and 33.4% (n = 250), respectively. The early complication rate was 8.9% (95% confidence interval [CI], 7.1% to 11.2%). Infection and mechanical complications were most prevalent. There was no statistically significant relationship between the incidence of complications and BMI (obesity vs. normal weight: hazard ratio [HR], 1.49; 95% CI, 0.72 to 3.06; p = 0.282); however, there was a tendency toward a greater risk of infectious complications in the patients with obesity (HR, 6.08; 95% CI, 0.75 to 49.16; p = 0.090). Patients with diabetes mellitus (DM) had more risk of infectious complications than those without DM (HR, 2.60; 95% CI, 1.00 to 6.79). Conclusions: There was no statistical relationship between BMI and early complications of THR and TKR. Nonetheless, there was a tendency toward a higher risk of infection in patients with some degree of obesity.
Word final and intervocalic glottalised /t/ replacement in Estuary English: Variety of Essex
Camilo André,s B. Carvajal 경희대학교 언어정보연구소 2016 언어연구 Vol.33 No.2
Carvajal, Camilo Andrés B. 2016. Word final and intervocalic glottalised /t/ replacement in Estuary English: Variety of Essex. Linguistic Research 33(2), 193-204. The realisation of /t/ as a glottal stop [ʔ] is a phenomenon described as occurring in word medial or final position (Docherty, 2010; Fabricius, 2002; Przedlacka, 2002; Roach, 1973). In English, sociolinguistic studies and phonological corpora (Schleef, 2013; Tagliamonte & Temple, 2005) have tried to frame and predict the context of glottal stops, since it is perceived as a phenomenon of change which is an index of membership to the Cockney or Estuary English, different from the variety of London. We explored a set of tokens containing glottalisation of the alveolar stop segment /t/ from a recorded corpus of naturally occurring data (British reality TV show The Only Way is Essex) in order to predict instances of glottal replacement. Main findings suggest that both onset or coda position are insufficient variables to determine the occurrence of [ʔ], but stress does allow a better calculation for contexts of glottalisation replacement. The present analysis expands prior findings in the literature by involving syllabic boundaries and stress to determine the maintenance of the alveolar feature in all studied samples, as well as to support former predictions that glottalised /t/ emerges in syllable final or intervocalic contexts relying on pure articulatory grounds. (University of Delaware)
Gergely Temesi,Viktor Virág,Éva Hadadi,Ildikó Ungvári,Lili E Fodor,András Bikov,Adrienne Nagy,Gabriella Gálffy,Lilla Tamási,Ildikó Horváth,András Kiss,Gábor Hullám,András Gézsi,Péter Sárközy,Péter Ant 대한천식알레르기학회 2014 Allergy, Asthma & Immunology Research Vol.6 No.6
Purpose:Based on a previous gene expression study in a mouse model of asthma, we selected 60 candidate genes and investigated their possible roles in human asthma. Methods: In these candidate genes, 90 SNPs were genotyped using MassARRAY technology from 311 asthmatic children and 360 healthy controls of the Hungarian (Caucasian) population. Moreover, gene expression levels were measured by RT PCR in the induced sputum of 13 asthmatics and 10 control individuals. t-tests, chi-square tests, and logistic regression were carried out in order to assess associations of SNP frequency and expression level with asthma. Permutation tests were performed to account for multiple hypothesis testing. Results: The frequency of 4 SNPs in 2 genes differed significantly between asthmatic and control subjects: SNPs rs2240572, rs2240571, rs3735222 in gene SCIN, and rs32588 in gene PPARGC1B. Carriers of the minor alleles had reduced risk of asthma with an odds ratio of 0.64 (0.51-0.80; P=7×10-5) in SCIN and 0.56 (0.42-0.76; P=1.2×10-4) in PPARGC1B. The expression levels of SCIN, PPARGC1B and ITLN1 genes were significantly lower in the sputum of asthmatics. Conclusions: Three potentially novel asthma-associated genes were identified based on mouse experiments and human studies.