Geomagnetism and Paleomagnetism Studies

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• EMİNE ÜLKÜ SARITAŞ ÇUKUR

One quarter of all iodinated contrast X-ray clinical imaging studies are now performed on Chronic Kidney Disease (CKD) patients. Unfortunately, the iodine contrast agent used in X-ray is often toxic to CKD patients' weak kidneys, leading to significant morbidity and mortality. Hence, we are pioneering a new medical im…

• EMİNE ÜLKÜ SARITAŞ ÇUKUR

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Magnetic particle imaging (MPI) shows promise for medical imaging, particularly in angiography of patients with chronic kidney disease. As the first biomedical imaging technique that truly depends on nanoscale materials properties, MPI requires highly optimized magnetic nanoparticle tracers to generate quality images.…

• EMİNE ÜLKÜ SARITAŞ ÇUKUR

Projection magnetic particle imaging (MPI) can improve imaging speed by over 100-fold over traditional 3-D MPI. In this work, we derive the 2-D x-space signal equation, 2-D image equation, and introduce the concept of signal fading and resolution loss for a projection MPI imager. We then describe the design and constr…

• EMİNE ÜLKÜ SARITAŞ ÇUKUR

For magnetic particle imaging (MPI), specific absorption rate (SAR) and more critically magnetostimulation (i.e., dB/dt) safety limits will determine the optimal scan parameters, such as the drive field strength and frequency. These parameters will impact the scanning speed, field-of-view (FOV) and signal-to-noise rat…

• EMİNE ÜLKÜ SARITAŞ ÇUKUR

Following a long interval (many days) of sustained very quiet geomagnetic conditions, electromagnetic ion cyclotron (EMIC) wave activity was seen by the CARISMA array (www.carisma.ca) on the ground for several hours simultaneously with enhanced solar wind density and related magnetic compression seen at GOES 12 on 29t…

Abstract We present a new quantitative technique that determines the times and durations of substorm expansion and recovery phases and possible growth phases based on percentiles of the rate of change of auroral electrojet indices. By being able to prescribe different percentile values, we can determine the onset and…

We derive a shortcut stationary metric formula for generating imperfect fluid rotating solutions, in Boyer–Lindquist coordinates, from spherically symmetric static ones. We explore the properties of the curvature scalar and stress–energy tensor for all types of rotating regular solutions we can generate without restri…

• MUSTAFA AZREG

We present an interval of extremely long‐lasting narrow‐band Pc5 pulsations during the recovery phase of a large geomagnetic storm. These pulsations occurred continuously for many hours and were observed throughout the magnetosphere and in the dusk‐sector ionosphere. The subject of this paper is the favorable radial a…

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• ORHAN AKYILMAZ