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An endo-xylanase produced by Aspergillus tamarii Kita was purified using the support CM-cellulose. The enzyme was immobilized on CM-cellulose, glyoxyl-agarose and CNBr-agarose, but the best support was considered the glyoxyl-agarose since its derivative had more stability than the CNBr-agarose derivative (control) in broad range of temperature. The derivatives had an important hyperactivation on glyoxyl-agarose...
This paper has the twofold goal of investigating the real-time performance of an EtherCAT master entirely built from open-source components (using Linux and the RT Patch at the operating system level) and assess its ability to support concurrent best-effort tasks without compromising the real-time ones, depending on kernel configuration. This is especially important for the successful adoption of...
The possibility of using Linux as underlying operating system for real-time applications has received considerable attention by industry due to several definite advantages, such as the lack of royalties and the availability of rich and programmer-friendly software development frameworks. In addition, the real-time capabilities of the Linux kernel have recently been enhanced considerably through the...
The steady increase in performance of the processors commonly adopted for real-time systems leads to the opportunity of hosting diverse classes of tasks on the same hardware, for example real-time control tasks and a man-machine interface, each one under the control of its own operating system. This paper describes how an asymmetric virtualisation layer has been realised on top of the ARM TrustZone...
The degree of sophistication of operating systems involved in factory automation has increased steadily in recent years, leading to products that provide the concurrent execution of process control functions and general-purpose applications. This paper gives some insights on the use of virtualization techniques on an ARM processor, in order to support the coexistence of multiple operating systems...
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