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For an evaluation of a thermal conductivity of Zr + 30 vol% ZrO2 simulated inert matrix nuclear fuel pellet, a simulated fuel pellet was fabricated using a hot-pressing method at 800°C in a vacuum and at a 20 MPa load. And several thermophysical properties of the simulated inert matrix fuel pellet were measured and calculated. The thermal diffusivity and linear thermal expansion as a function of temperature of the simulated fuel pellet were measured using a laser flash method and a dilatometry, respectively. Finally, based on the experimental data, the thermal conductivity of the simulated inert matrix fuel pellet was calculated and evaluated.
This paper aims to identify and clarify the cyber
security risks and their interaction with the power system in Smart Grid. The
SCADA system and other communication networks interact with the power system on
a real time basis, so it is important to understand the interaction between two
layers to protect the power system from potential cyber threats. This paper has
shown the risks of the open architecture SCADA in a quantitative method and
proposed effective security measures through case studies.
and objectives: Increased arterial stiffness is an accepted cardiovascular risk factor. Several studies have shown that
regular exercise is associated with reduced arterial stiffness. However, the
acute effect is not well known. The aim of this study was to evaluate the immediate
impact of exercise on arterial stiffness measured by pulse wave velocity (PWV).
Subjects and Methods: Data from
100 consecutive patients who underwent graded maximal aerobic exercise test
and pulse wave velocity study due to chest pain were analyzed. Results: With
respect to brachial-ankle pulse wave velocity (baPWV), it decreased after the
exercise test (before vs. after; 1420 ± 260 vs. 1358 ± 245, 1428 ± 255, vs.
1360 ±239 cm/sec;
left and right, respectively). Upper extremity systolic blood pressure did not
change from baseline. However, upper extremity diastolic blood pressure
increased slightly. In addition, lower extremity blood pressure decreased
in both systolic and diastolic phases. In both normotensives and hypertensives,
baPWV decreased after exercise test. Conclusion: Exercise immediately decreases
We report a case of successful survival from ventricular free wall rupture without surgery, which was not overt rupture but
micro-rupture. The patient was diagnosed with acute myocardial infarction (AMI)
and underwent primary percutaneous coronary intervention (PCI). Myocardial
blood leakage could be detected on transthoracic echocardiography with intravenous
infusion of contrast dye 3 days after PCI. This examination revealed that there
was not overt perforation but diffuse fissure. Because of his critical condition,
he was treated conservatively without surgery. Nevertheless, he survived