Role of magnetic interparticle coupling on the field dependence of the superparamagnetic relaxation time

2005 ◽  
Vol 72 (21) ◽  
Author(s):  
W. C. Nunes ◽  
L. M. Socolovsky ◽  
J. C. Denardin ◽  
F. Cebollada ◽  
A. L. Brandl ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Field Dependence ◽  
Superparamagnetic Relaxation

Field Dependence and Self-Disclosure

1973 ◽  
Vol 36 (3) ◽  
pp. 735-738 ◽  
Author(s):  
Joaquin F. Sousa-Poza ◽  
Robert Rohrberg ◽  
Ernest Shulman
Keyword(s):  
Social Behavior ◽  
Field Dependence ◽  
The Self ◽  
Social Stimuli ◽  
Self Disclosure ◽  
Field Independent ◽  
The Social ◽  
Field Dependent ◽  
Personality Theories

Some characteristics of the social behavior of field-dependents as well as their superior recognition of ambiguous social stimuli led to the hypothesis that they would show greater self-disclosure than field-independents. This hypothesis was tested by administering the 60-item Jourard Self-disclosure Questionnaire (JSDQ) to 13 field-dependent and 13 field-independent Ss. In terms of total self-disclosure scores, field-dependents showed significantly (.025) higher levels than field-independents. Results are discussed in light of personality theories which emphasize the role of self-conceptual transactions in the development of the self.

The Role of Stochastic Noise on the Glass Transition

1995 ◽  
Vol 407 ◽  
Author(s):  
Fernando C. Perez-Cardenas ◽  
Hao Gan
Keyword(s):  
Relaxation Time ◽  
Glass Transition ◽  
Time Spectrum ◽  
Structure Evolution ◽  
Stochastic Noise ◽  
Relaxation Time Spectrum ◽  
Glass Transition Region ◽  
Type Differential Equation ◽  
Glass Relaxation

ABSTRACTGlasses are amorphous solids that exhibit an intricate structural relaxation. A broad relaxation time spectrum always emerges when these systems are perturbed. By using a Langevin-type differential equation to describe the structure dynamicsof these materials, it is depicted how the broad relaxation time spectrum arises due to the stochastic noise and how this affects the system's structure evolution as it is cooled down into the glass transition region. This stochastic model provides a macroscopic as well a microscopic view of the glass relaxation process.

Task Requirements and Field Dependence in Incidental Learning

1975 ◽  
Vol 40 (3) ◽  
pp. 903-906 ◽  
Author(s):  
Stephen Wolk ◽  
Cyril P. Svoboda
Keyword(s):  
Field Dependence ◽  
Incidental Learning ◽  
Substantial Variation ◽  
Attentional Set ◽  
Retention Level ◽  
Task Requirements ◽  
Content Reading

The role of orienting task and field dependence/independence in incidental learning was explored in the present study. 56 students read discursive text for acquisition of content or for detection of typographical errors. Incidental items were instances of objects, names, and numbers. Content reading produced more incidental learning, and field-dependents exceeded independents in incidental learning only on the cover task of content reading. Also, the retention level of incidental material after 21 days was substantial. Variation in attentional set was suggested as an important factor in incidental learning.

scholarly journals Role of quantitative analysis of T2 relaxation time in differentiating benign from malignant breast lesions

2018 ◽  
Vol 46 (5) ◽  
pp. 1928-1935 ◽  
Author(s):  
Li Liu ◽  
Bo Yin ◽  
Kawai Shek ◽  
Daoying Geng ◽  
Yiping Lu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Relaxation Time ◽  
Quantitative Analysis ◽  
Breast Lesions ◽  
T2 Relaxation Time ◽  
T2 Relaxation ◽  
Malignant Breast ◽  
Mri Diagnosis ◽  
Malignant Lesions

Objective To investigate the role of quantitative analysis of T2 relaxation time in the magnetic resonance imaging (MRI) diagnosis of breast cancer. Methods The study enrolled patients with clinical breast masses who were examined using MRI at eight different echo times. The differences in T2 relaxation time of benign and malignant breast lesions were analysed. Results A total of 67 patients (67 breast lesions: 46 malignant, 21 benign) were examined. The mean ± SD T2 relaxation time was significantly lower in the 46 malignant lesions compared with the 21 benign lesions (82.69 ± 15.37 ms versus 95.48 ± 26.51 ms, respectively). The area under the curve was 0.731. Using 79.52 ms as the cut-off between benign and malignant breast lesions, a sensitivity of 85.7% and a specificity of 58.7% were obtained. Conclusions There was a significant difference in T2 relaxation time between benign and malignant breast lesions. The specificity of using T2 relaxation time alone for the differentiation of benign from malignant lesions was not high, but it could constitute a new adjunct in the MRI diagnosis of breast cancer.

Role of extracellular Ca2+ in diaphragmatic contraction: effects of ouabain, monensin, and ryanodine

1992 ◽  
Vol 73 (1) ◽  
pp. 30-35 ◽  
Author(s):  
J. H. Zavecz ◽  
W. M. Anderson
Keyword(s):  
Relaxation Time ◽  
Free Solution ◽  
Pharmacological Agents ◽  
Resting Tension ◽  
High K ◽  
Before And After ◽  
Small Muscle ◽  
Ionophore Monensin

The effects of zero extracellular Ca2+ on the contractility of rat diaphragmatic strips in vitro were studied in conjunction with various pharmacological agents known to influence the intracellular Ca2+ concentration: the Na+ ionophore, monensin, and the Na(+)-K+ pump inhibitor, ouabain, which enhance [Ca2+]i, caffeine, which induces Ca2+ release from the sarcoplasmic reticulum (SR), and ryanodine, which prevents Ca2+ retention by the SR. The effect of increasing [Ca2+]i on diaphragmatic contraction was assessed by comparing contractions induced by 120 mM K+ in the small muscle strips before and after the addition of ouabain or monensin. Monensin (20 microM) and ouabain (1–100 microM) augmented contractions up to threefold. Treatment of diaphragm strips with 3 nM ryanodine increased baseline tension 360% above the original resting tension but only if the diaphragm was electrically stimulated concurrently; 100 microM ryanodine induced contracture in quiescent tissue. High K+ contractures were of greater magnitude in the presence of ryanodine compared with control, and relaxation time was prolonged by greater than 200%. Ca(2+)-free conditions ameliorated these actions of ryanodine. Ryanodine reduced contractions induced by 10 mM caffeine and nearly abolished them in Ca(2+)-free solution. The data demonstrate that extracellular Ca2+ is important in certain types of contractile responses of the diaphragm and suggest that the processes necessary to utilize extracellular Ca2+ are present in the diaphragm.

scholarly journals Effect of an oblique magnetic field on the superparamagnetic relaxation time

1995 ◽  
Vol 52 (22) ◽  
pp. 15951-15965 ◽  
Author(s):  
W. T. Coffey ◽  
D. S. F. Crothers ◽  
J. L. Dormann ◽  
L. J. Geoghegan ◽  
Yu. P. Kalmykov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Relaxation Time ◽  
Superparamagnetic Relaxation ◽  
Oblique Magnetic Field

scholarly journals The Role of Thin Filament Calcium Sensitivity in Modulating Relaxation Time of Soleus and EDL Skeletal Muscle

2020 ◽  
Vol 118 (3) ◽  
pp. 122a
Author(s):  
Connor Tyree ◽  
Kyra Peczkowski ◽  
Paul M. Janssen ◽  
Jill Rafael-Fortney ◽  
Jonathan P. Davis
Keyword(s):  
Skeletal Muscle ◽  
Relaxation Time ◽  
Thin Filament ◽  
Calcium Sensitivity
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