Activation Hardware Features

The hardwired ESD activation means is usually a push in knob or button. Confirmed action of the push button should be always be required to manually activate the ESD system in order to prevent accidental activations. Most commonly a protective cover is fitted over any of the push button or manual activation devices. All devices should only be manually resettable. 

Each activation point should be labeled to area of coverage and provided with and identification as to which valves it operates or equipment it shutdowns. A specific identifier number should be assigned to each device. The location itself should be highly visible, preferably highlighted in contrasting colors to normal equipment housings. 

In some instances it may be beneficial to maintain process inventories of certain process vessels until the incident is actually threatening the container. The inventory of the vessel may be crucial to the restart of a facility or the contents may be highly valuable. Loss of the inventory may be criticized if frequent false trips of the ESD blowdown system occur. In these cases an automatic fusible plug blowdown valve could be installed which would only activate from the heat of a real fire incident. In this way, a false disposal of the inventory can be avoided. 

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The user interfaces of medical devices are important because they help to facilitate correct actions and prevent or discourage the occurrence of hazardous actions. They comprise all elements of medical devices with which users interact while using devices, preparing them for use (e.g., setup and calibration), or performing maintenance activities. The user interface incorporates all hardware features that control the device operation. Some examples of these features are as follows [2,6] ... 

Public key cryptography is fast becoming the foundation for on-line commerce and other applications that require security and authentication. The use of this kind of cryptography requires a public key infrastructure (PKI) to publish and manage public key values. To prepare the activities for the implementation of PKI features an evaluation of commercial hardware and software solutions is necessary. The implementation of PKI features generally can be divided into several steps ... 

Figure 6.1 reveals a number of interesting features. We note that there is a separate line for the H channel and one for the 13C channel . These channels represent the hardware associated with the irradiation and signal acquisition of each relevant nucleus in our experiments. Following equilibration (td), the pulse sequence used to obtain a 1-D proton spectrum consists of a tt/2x pulse, delay, and signal acquisition of the order of seconds (Fig 6.1a). We also notice that the 13C channel is inactive during a simple proton experiment. Normally, we will not show a given channel unless there is some activity in that channel. 

Access control—A method of restricting the movement of persons into or within a protected area by manual (guards), hardware (locks and keys), or software (electronic card or biometric readers). Accessible—An ADA term about having the legally required features and/or qualities that ensure entrance, participation, and usability of places, programs, services, and activities by individuals with a wide variety of disabilities. 

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