Single-unit recording neural probes have significant advantages towards improving signal-to-noise ratio and specificity for signal acquisition in brain-to-computer interface devices. Long-term effectiveness is unfortunately limited by the chronic injury response, which has been linked to the mechanical mismatch between rigid probes and compliant brain tissue. Small, flexible microelectrodes may...

BACKGROUND Tortuous arteries are often seen in patients with hypertension and atherosclerosis. While the mechanical stress in atherosclerotic plaque under lumen pressure has been studied extensively, the mechanical stability of atherosclerotic arteries and subsequent effect on the plaque stress remain unknown. To this end, we investigated the buckling and post-buckling behavior of model stenoti...

In practice, structural systems are complicated. When dealing with such systems, the use of analytical simulations is or may be impossible to apply, since problem includes many variables partial differential formulations. The stability and dynamic response structures an important aspect that must paid particular attention in order ensure safety against collapse. A physical phenomenon a reasonab...

For the first time, we report on methods to control and prevent polymer films from buckling. Buckled morphologies were created by thermally cycling or mechanically compressing a poly(dimethylsiloxane) substrate coated with a polyelectrolyte multilayer film. By variation of the dimensions of the surface topography relative to the buckling wavelength (e.g., pattern size is less than, equal to, an...

The problem of a thin spherical linearly-elastic shell, perfectly bonded to an infinite linearly-elastic medium is considered. A constant axisymmetric stress field is applied at infinity in the matrix, and the displacement and stress fields in the shell and matrix are evaluated by means of harmonic potential functions. In order to examine the stability of this solution, the buckling problem of ...

The influence of yield strength on the in-plane stability and design structural steel square rectangular hollow section (SHS RHS) beam-columns under compression plus uniform bending is investigated in this study. Ten buckling tests were carried out hot-finished S690 SHS 100×100×4 (in mm) specimens combined uniaxial bending. Finite element (FE) models RHS established, validated employed to perfo...

Sepeda motor dengan kapasitas 150 cc sering digunakan untuk balapan di Indonesia. Tekanan tinggi dan berulang yang diterima piston selama kompresi menimbulkan beban fatigue pada connecting rod. Pada beberapa kasus, rod dapat terjadi buckling (bengkok) atau fracture (patah) bagian kritisnya akibat tidak kuat menahan dari piston. Untuk mengantisipasi terjadinya maka diperlukan pemilihan material ...

background: factor vii concentrates are used in patients with congenital or acquired factor vii deficiency or treatment of hemophilia patients with inhibitors. in this research, immunoaffinity chromatography was used to purify factor vii from prothrombin complex (prothrombin-proconvertin-stuart factor-antihemophilic factor b or ppsb) which contains coagulation factors ii, vii, ix and x. the aim...

Buckling is a condition where an object bent due to the application of compression (compressive) load on object. often occurs in thin-walled structures such as plates. This study aims determine buckling strength isotropic and quasi-isotropic The method used Finite Element Method (MEH). material uses aluminum 2024-T3, while carbon/epoxy T300-5208 with [0°/90°/45°/-45°]s laminate arrangement. Mod...

The buckling of compressively-loaded members is one of the most important factors limiting the overall strength and stability of a structure. I have developed novel techniques for using active control to wiggle a structural element in such a way that buckling is prevented. I present the results of analysis, simulation, and experimentation to show that buckling can be prevented through computer-...