On the role of minority carriers in the frequency dependence of organic magnetoresistance

2011 ◽  
Vol 161 (7-8) ◽  
pp. 617-621 ◽  
Author(s):  
P. Janssen ◽  
W. Wagemans ◽  
W. Verhoeven ◽  
E.H.M. van der Heijden ◽  
M. Kemerink ◽  
...  
Keyword(s):  
Frequency Dependence ◽  
Organic Magnetoresistance ◽  
Minority Carriers

About the Role of Minority Carriers in the Impurity Conduction of GaSb

1967 ◽  
Vol 22 (2) ◽  
pp. 741-745 ◽  
Author(s):  
M. I. Aliev ◽  
G. I. Safaraliev ◽  
S. G. Abdinova
Keyword(s):  
Impurity Conduction ◽  
Minority Carriers

On the role of hydrogen in organic magnetoresistance: A study of C60 devices

2007 ◽  
Vol 157 (22-23) ◽  
pp. 930-934 ◽  
Author(s):  
T.D. Nguyen ◽  
Y. Sheng ◽  
M. Wohlgenannt ◽  
T.D. Anthopoulos
Keyword(s):  
Organic Magnetoresistance

Frequency dependence of organic magnetoresistance

2010 ◽  
Vol 97 (12) ◽  
pp. 123301 ◽  
Author(s):  
W. Wagemans ◽  
P. Janssen ◽  
E. H. M. van der Heijden ◽  
M. Kemerink ◽  
B. Koopmans
Keyword(s):  
Frequency Dependence ◽  
Organic Magnetoresistance

scholarly journals Role of frequency dependence in dynamical gap generation in graphene

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
M. E. Carrington ◽  
C. S. Fischer ◽  
L. von Smekal ◽  
M. H. Thoma
Keyword(s):  
Frequency Dependence

scholarly journals Role of electron-hole pair formation in organic magnetoresistance

2009 ◽  
Vol 79 (20) ◽  
Author(s):  
Sayani Majumdar ◽  
Himadri S. Majumdar ◽  
Harri Aarnio ◽  
Dirk Vanderzande ◽  
Reino Laiho ◽  
...  
Keyword(s):  
Pair Formation ◽  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Organic Magnetoresistance

Role of inertia in the measurement of dynamic compliance

1975 ◽  
Vol 38 (1) ◽  
pp. 64-69 ◽  
Author(s):  
J. Dosman ◽  
F. Bode ◽  
J. Urbanetti ◽  
R. Antic ◽  
R. Martin ◽  
...  
Keyword(s):  
Frequency Dependence ◽  
Dynamic Compliance ◽  
Age Group ◽  
Older Individuals ◽  
Breathing Frequency ◽  
Frequency Dependent ◽  
Younger Age ◽  
Significant Difference ◽  
Males And Females

Dynamic compliance (Cdyn) was measured at different frequencies (breaths/min) in 30 nonsmoking males and females aged 30–59 yr. In those aged 30–49 yr Cydn at 90 breaths/min was significantly higher than at 15 breaths/min while those aged 50–59 yr showed no significant difference. Assuming an inertance of 0.01 cmH2O/l per s-2, and a sinusoidal breathing frequency, Cydn at 60 and 90 breaths/min was corrected for inertia. In the 30–49 yr age group corrected Cydn did not change with increasing frequency of breathing whereas in the 50–59 yr age group Cydn at 15 breaths/min was significantly higher than at 90 breaths/min (P is less than 0.05). In this age group, four of eight subjects were frequency dependent when corrected for inertia. These findings indicate that inertia influences Cydn at breathing frequencies of 60 per min and above. Unless this is taken into account, frequency dependence of compliance may be missed. The results also indicate that frequency dependence of compliance is normal in some older individuals but is not normal in the younger age group.

Role of frequency dependence of the nonlinearity on asoliton’s evolution in photonic crystal fibers

2021 ◽  
Author(s):  
Surajit Bose ◽  
Oliver Melchert ◽  
Stephanie Willms ◽  
Ihar Babushkin ◽  
Uwe Morgner ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Frequency Dependence ◽  
Photonic Crystal Fibers ◽  
Crystal Fibers

scholarly journals Luminal Ca2+ content regulates intracellular Ca2+ release in subepicardial myocytes of intact beating mouse hearts: effect of exogenous buffers

2010 ◽  
Vol 298 (6) ◽  
pp. H2138-H2153 ◽  
Author(s):  
Dmytro Kornyeyev ◽  
Mariano Reyes ◽  
Ariel L. Escobar
Keyword(s):  
Frequency Dependence ◽  
Ventricular Myocytes ◽  
Heart Beat ◽  
Association Rate ◽  
Intact Mouse ◽  
High Affinity ◽  
Pathological Conditions ◽  
Epicardial Layer ◽  
Major Factors

Ca+-induced Ca2+ release tightly controls the function of ventricular cardiac myocytes under normal and pathological conditions. Two major factors contributing to the regulation of Ca2+ release are the cytosolic free Ca2+ concentration and sarcoplasmic reticulum (SR) Ca2+ content. We hypothesized that the amount of Ca2+ released from the SR during each heart beat strongly defines the refractoriness of Ca2+ release. To test this hypothesis, EGTA AM, a high-affinity, slow-association rate Ca2+ chelator, was used as a tool to modify luminal SR Ca2+ content. An analysis of the cytosolic and luminal SR Ca2+ dynamics recorded from the epicardial layer of intact mouse hearts indicated that the presence of EGTA reduced the diastolic SR free Ca2+ concentration and fraction of SR Ca2+ depletion during each beat. In addition, this maneuver shortened the refractory period and accelerated the restitution of Ca2+ release. As a consequence of the accelerated restitution, the frequency dependence of Ca2+ alternans was significantly shifted toward higher heart rates, suggesting a role of luminal SR Ca2+ in the genesis of this highly arrhythmogenic phenomenon. Thus, intra-SR Ca2+ dynamics set the refractoriness and frequency dependence of Ca2+ transients in subepicardial ventricular myocytes.

Phase transition behaviors of BaTiO3–BaZrO3 solid solutions under high direct current bias fields

2002 ◽  
Vol 17 (2) ◽  
pp. 456-464 ◽  
Author(s):  
S. Wada ◽  
H. Adachi ◽  
H. Kakemoto ◽  
H. Chazono ◽  
Y. Mizuno ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Frequency Dependence ◽  
Low Temperatures ◽  
Dielectric Constants ◽  
Broad Peak ◽  
Dielectric Peak ◽  
Direct Current Bias ◽  
Dc Bias

The dielectric properties of the Ba(Ti1–xZrx)O3 (BT1–xZx) ceramics with various compositions were investigated under various DC bias fields. In BT0.94Z0.06 ceramics, the dielectric constants (ε) vs temperature (T) curves without DC bias showed no frequency dependence. Its DC bias dependence exhibited that with increasing DC bias fields, the dielectric constants were suppressed while phase transition peaks slightly shifted to high temperature. In BT0.58Z0.42 ceramics, the ε vs T curves without DC bias showed a broad peak with a clear frequency dependence, which revealed that BT0.58Z0.42 ceramics were the relaxor. Its DC bias dependence exhibited that with increasing DC bias fields, the dielectric constants were suppressed while the phase transition peak largely shifted to low temperatures. In BT0.79Z0.21 ceramics, the ε vs T curves without DC bias showed a broad peak without frequency dependence. Its DC bias dependence revealed that the dielectric peak shifted to high temperature and broadened with increasing DC bias. To explain the above phenomena, it was considered that the role of Zr ions on BT1−xZx ceramics is to make the depth of the potential well shallow successively.

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