نتایج جستجو برای: curvilinear anisotropy

تعداد نتایج: 38424  

A. Sadidkhouy K. Latifi M. R. Ghassemi

Estimation of the fast polarization direction of shear seismic waves that deviate from horizontal axis is a valuable approach to investigate the characteristics of the lower crust and uppermost mantle structures. The lattice preferred orientation of crystals, which is generally parallel to the downward or upward flow of the mantle or crust, is an important reason for the occurrence of fast axis...

2016
Norbert Pirk Mikhail Mastepanov Frans-Jan W. Parmentier Magnus Lund Patrick Crill Torben R. Christensen

The closed chamber technique is widely used to measure the exchange of methane (CH4) and carbon dioxide (CO2) from terrestrial ecosystems. There is, however, large uncertainty about which model should be used to calculate the gas flux from the measured gas concentrations. Due to experimental uncertainties the simple linear regression model (first-order polynomial) is often applied, even though ...

Journal: :International psychogeriatrics 2010
Ajit Shah

BACKGROUND A recent cross-national study demonstrated a curvilinear (inverted U-shaped curve) between elderly male suicide rates and the Human Development Index (HDI) fitting the quadratic equation y = a + bx - cx2 where y is the elderly male suicide rate, x is the HDI and a, b and c are constants). This study used only one-year cross-sectional data on suicide rates, and suicide rates can rando...

2016
Per Nissen

The nucleotides guanosine tetraphosphate (ppGpp) and guanosine pentaphosphate (pppGpp) bind to target proteins to promote bacterial survival (Corrigan et al. 2016). Thus, the binding of the nucleotides to RsgA, a GTPase, inhibits the hydrolysis of GTP. The dose response, taken to be curvilinear with respect to the logarithm of the inhibitor concentration, is instead much better (P<0.001 when th...

2018
Johnson Ching-Hong Li

In behavioral sciences, researchers often examine whether any linear moderations exist in their studies. That is, they evaluate the extent (i.e., magnitude, direction) to which a linear effect of a predictor X (e.g., cognitive ability) on a criterion Y (e.g., performance) may differ across the levels of a moderator M (e.g., gender). In that case, researchers often run a liner regression analysi...

2016
Daniel O. Claassen David G. Dobolyi David A. Isaacs Olivia C. Roman Joshua Herb Scott A. Wylie Joseph S. Neimat Manus J. Donahue Peter Hedera David H. Zald Bennett A. Landman Aaron B. Bowman Benoit M. Dawant Swati Rane

Advancing age and disease duration both contribute to cortical thinning in Parkinson's disease (PD), but the pathological interactions between them are poorly described. This study aims to distinguish patterns of cortical decline determined by advancing age and disease duration in PD. A convenience cohort of 177 consecutive PD patients, identified at the Vanderbilt University Movement Disorders...

Journal: :Pattern Recognition 2002
Jeong-Hun Jang Ki-Sang Hong

In this paper, we present a newmethod for detecting curvilinear structures and reconstructing their regions in gray-scale images. The concept of skeleton extraction is introduced to detect more general structures such as tapering structures. A candidate skeleton is extracted from the Euclidean distance map that is constructed based on the edge map of an input image. The extracted skeleton is us...

Hadi Hedayati Kh Maedeh Fazlalizadeh Mahmoud Bahmanabadi Mehdi Khakian Ghomi,

Geomagnetic field is a one of the candidates for creation of anisotropy in azimuth distribution of extensive air showers over the entered cosmic rays to the atmosphere. Here we present the question: Is there any azimuth anisotropy flux in the upper level of the atmosphere due to the geomagnetic field over the entered cosmic-rays? The obtained answer is: yes. This investigation showed an agreeme...

Journal: :AJNR. American journal of neuroradiology 2000
A J Barkovich

BACKGROUND AND PURPOSE Gray matter heterotopia have been divided into three groups based on clinical and imaging characteristics: subependymal, subcortical, and band heterotopia. Nonetheless, subcortical heterotopia can have variable morphologic findings. The purpose of this study was to perform a morphologic analysis of a series of cases of subcortical heterotopia based on MR images, to correl...

A. Abyazi, A. Ebrahimi S. Abbasi

Thermomechanical control process steel <span style="font-family: 'Times New Roman','serif'; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-language: AR-SA; m...

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