in this paper, a new analytical method is proposed to study the effect of crack and axial load on vibration behavior and stability of the cracked columns. using the local flexibility model, the crack has been simulated by a torsional spring with connecting two segments of column in crack location. by solving governing eigenvalue equation, the effect of crack parameters and axial load on the nat...

In this commentary, we discuss Gersten’s findings particularly in relation to the challenge of accurately measuring stress, neuroendocrine markers and allostatic load. Allostatic load is a timely, potentially useful tool to measure the degree in which the body’s physiological function is outside of optimal range. As with most biomarkers early on in development, there are sound opportunities to ...

background: hepatitis activity index (hai) and fibrosing stage are two important findings during the evaluation of liver samples in patients with chronic hepatitis b. the aim of this study was to determine the hai and fibrosing stage in patients with anti-hbe positive chronic hepatitis b. methods: liver biopsy slides of 72 patients were evaluated at the department of pathology in two teaching h...

background: the study evaluated qualitative pcr, primers 121-122 as a tool to follow up evolution parasite load of trypanosoma cruzi . methods: the study was conducted at the state university of maringa, in 2015. step 1, dilutions 1/10 were performed from t. cruzi -y strain to obtain preparations of 50,000-0.05 parasites/ml from which dna were extracted, quantified, and amplified. step 2, the e...

conclusions it is concluded that most hbeag negative hepatitis b patients with serum hbv dna level of 2000-20000 iu/ml, persistent normal alt concentration, and no or mild liver damage on biopsy can be clinically managed as hbv inactive carriers. results two hundred forty-three hbeag negative hepatitis b patients were stratified into three groups based on to their hbv dna level including group ...

estimate of sediment load is required in a wide spectrum of water resources engineering problems. the nonlinear nature of suspended sediment load series necessitates the utilization of nonlinear methods to simulate the suspended sediment load. in this study artificial neural networks (anns) are employed to estimate daily suspended sediment load. two different ann algorithms, multi layer percept...

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the proposal lateral load pattern for pushover analysis is given in two forms for symmetric concrete buildings: 1-(x/h)0.5 for low-rise and mid-rise buildings, 2- sin(πx/h) for high-rise buildings. these two forms give more realistic results as compared to conventional load patterns such as triangular and uniform load patterns. the assumed buildings of 4, 8, 12, 16, 20 and 30 story concrete bui...