Scaling anomaly at the critical transition of an incommensurate structure

1987 ◽  
Vol 36 (12) ◽  
pp. 5858-5861 ◽  
Author(s):  
J. M. Greene ◽  
H. Johannesson ◽  
B. Schaub ◽  
H. Suhl
PMLA ◽  
1955 ◽  
Vol 70 (3) ◽  
pp. 350-374
Author(s):  
John E. Englekirk

Students of Spanish literature of the first half of the 19th century still stand indebted to Georges Lc Centil for his partial analysis of and index to thirty-one literary journals published in :Madrid between 1803 and 1849. More recently additional light has been thrown on this period through the publication of complete indices for a number of reviews not covered by Le Gentil as well as for several included in his survey. Thus far, however, there has been no planned approach to duplicate the above efforts for the critical transition years, roughly 1850–70, from the decline of romanticism to the triumph of realism. The CSIC series to clate includes only two reviews that afford but partial coverage for these years: the above-cited Semanario pintoresco espanol (1836-57) and Educación pintoresca (1857-59). The latter, moreover, is of scant literary significance.


2015 ◽  
Vol 8 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Natascha J.H. Broers ◽  
Anne C.M. Cuijpers ◽  
Frank M. van der Sande ◽  
Karel M.L. Leunissen ◽  
Jeroen P. Kooman

2008 ◽  
Vol 63 (11-12) ◽  
pp. 1372-1375 ◽  
Author(s):  
H.P. Roeser ◽  
F. Hetfleisch ◽  
F.M. Huber ◽  
M.F. von Schoenermark ◽  
M. Stepper ◽  
...  

2008 ◽  
Vol 23 (12) ◽  
pp. 3363-3369 ◽  
Author(s):  
C.V. Varanasi ◽  
J. Burke ◽  
L. Brunke ◽  
H. Wang ◽  
J.H. Lee ◽  
...  

Previous work on YBa2Cu3O7−x (YBCO) + BaSnO3 (BSO) films with a single composition showed significant critical current density (Jc) improvements at higher fields but lowered Jc in low fields. A detailed study on BSO concentrations provided here demonstrates that significant Jc enhancement can occur even up to 20 mol% BSO inclusion, where typical particulate inclusions in these concentrations degrade the YBCO performance. YBCO + BSO films were processed on (100) LaAlO3 substrates using premixed targets of YBa2Cu3O7-x (YBCO) with additions of 2, 4, 10, and 20 mol% BSO. The critical transition temperature Tc of the films remained high (>87 K), even with large amounts (20 mol%) of BSO. YBCO + BSO films showed a gradual increase in Jc at high fields as the amount of BSO was increased. More than an order of magnitude increase in Jc was measured in YBCO + BSO samples as compared to regular YBCO at 4 T. YBCO + 10 mol% BSO films showed overall improvement at all the field ranges while YBCO + 20 mol% BSO was better only at high fields. Transmission electron microscopy revealed the presence of ∼7–8-nm-diameter BSO nanocolumns, the density of which increased with increasing BSO content correlating well with the observed improvements in Jc.


2015 ◽  
Vol 14 (5) ◽  
pp. 540-540 ◽  
Author(s):  
Jesse L. Silverberg ◽  
Jun-Hee Na ◽  
Arthur A. Evans ◽  
Bin Liu ◽  
Thomas C. Hull ◽  
...  

2012 ◽  
Vol 500 ◽  
pp. 146-151 ◽  
Author(s):  
Ning Hou ◽  
Li Zhou ◽  
Shu Tao Huang ◽  
Li Fu Xu

In this paper, a finite element method was used to dynamically simulate the process of the edge defects formation during orthogonal cutting SiCp/Al composites. The influence of the cutting speed, cutting depth and rake angle of the PCD insert on the size of the edge defects have been investigated by using scanning electron. According to the simulated results, it can be provided that the cutting layer material has an effect on transfer stress and hinder the chip formation in the critical transition stage, and the critical transition point and distance are defined in this stage. The negative shear phenomenon is found when the chip transit to the edge defects in the flexure deformation stage, so the process of the chip formation is the basis of the edge defects formation. In addition, the relationship between the nucleation and propagation direction of the crack and the variation of the edge defect shape on the workpiece was investigated by theory, and it found that the negative shear angle formation is the primary cause of the edge defect formation. A mixed mode crack is found in the crack propagation stage. The sizes of edge defects were measured by the experiment and simulation, and the edge defect size decrease with the increasing of tool rake angle, while increase with increasing cutting depth and cutting speed.


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