By C.C. Ko PhD, Ben M. Chen PhD, Jianping Chen PhD (auth.)
Remote web-based experimentation, allowing scholars and researchers to entry the laboratory each time through the net, is changing into an more and more beautiful strategy to supplement or maybe exchange conventional laboratory classes. putting a video digicam & microphone ahead of the apparatus and gear to seize what's really taking place within the laboratory permits the photographs and audio information to be streamed to the customer facet. Researchers in several nations can proportion gear and behavior learn cooperatively and remotely. The authors summarise their learn and talk about the advance of the five web-based laboratories introduced from the nationwide college of Singapore. the rules, constitution, and applied sciences required for the production of web distant experimentation structures are mentioned with specific emphasis at the integration of and software program structures. additionally highlighted is the layout and improvement of interfaces and elements to be used in commonplace web-based laboratories or related web-control applications.
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The applet receives camera movement commands from the user interface and sends the command strings to the Web server. The latter in turn passes the commands to the control server, which then controls the servo unit or the base of the camera to make the appropriate movement. The last applet is an audio/video one and is responsible for retrieving audio/video information from the audio/video server. The applet can be generated either by an ActiveX control object or Java Media Framework Player API.
6. Since the actual instrument has many features but only a few important ones are relevant for the experiment, a simplified front panel is provided in the GUI. Another reason for having such a design is that the users or students will not be overwhelmed by the complexity of the instrument and yet will be able to get a good, realistic feeling of using a real, expensive spectrum analyzer. In terms of feasibility, it is in fact quite straightforward for the Web-based instrument to have exactly the same function as the real equipment if necessary.
X Header Length The header length is the length of the entire header, including any options, in 32-bit words. The maximum value of this 4-bit field is 15, giving a maximum IP header length of 60 bytes. Hence, with the fixed portion of the header occupying 20 bytes, the header may contain another 40 bytes of optional information. 3. Format of an IPv4 header. 4, this 8-bit type-of-service (TOS) field consists of a 3-bit precedence field (which is ignored), 4 bits specifying the type of service, and an unused bit that must be 0.
Creating Web-based Laboratories by C.C. Ko PhD, Ben M. Chen PhD, Jianping Chen PhD (auth.)