The present invention relates to an optical probe with an optical guide, e. The network includes a common database that can be accessed by a plurality of websites. The control system is adapted to receive a first signal from the first thermal sensor and a second signal from the second thermal sensor, compare information conveyed in the first and second signals, and adjust the position of the solar cell by operating the support structure in response to information conveyed in the first and second signals. A cable is used to connect an individual to the second post, and thus secure them to the construction site. Furthermore, the method includes selecting a provider from a plurality of providers of a network to assign the media service component. The different segment descriptions are transmitted in separate data packets over the network at different points of time.