C.C. Ko PhD, Ben M. Chen PhD, Jianping Chen PhD (auth.)'s Creating Web-based Laboratories PDF
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 web, is changing into an more and more beautiful solution to supplement or maybe exchange conventional laboratory classes. putting a video digital camera & microphone sooner than the gear and gear to trap what's really taking place within the laboratory permits the photographs and audio information to be streamed to the buyer facet. Researchers in several international locations can percentage gear and behavior learn cooperatively and remotely. The authors summarise their examine and speak about the advance of the five web-based laboratories introduced from the nationwide collage of Singapore. the foundations, 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 platforms. additionally highlighted is the layout and improvement of interfaces and parts to be used in normal web-based laboratories or comparable web-control applications.
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The Web-based laboratory for the frequency modulation experiment is created based on this structure, where the first client/server pair corresponds to the client and Web server and the second pair corresponds to the Web server and controller. Data flow in the structure is as follows. The Java applet that runs on the client side sends a request for connecting to the Web server. c, in turn sends a connection request to the controller as well as accepting the request from the client. vi on the controller accepts the request and thus establishes an indirect channel from the client to the controller.
11. Basically, once the power button is on, the voltage applied to its input will be continuously measured and displayed. 11. Instrument panel for the voltmeter. 1 Java Applet The instrument panels described above are created using Java applets. In general, Java can be used to create either a stand-alone application or an applet . The former does not need to be embedded in an HTML document and can be run without using any browser. In our Web-based laboratories, most of the Java programs are for the creation of applets.
1 Protocols Most client/server applications use either TCP or UDP. These two protocols utilize either IP Version 4 (IPv4) or IP Version 6 (IPv6) of the network-layer protocol IP. User Datagram Protocol – UDP UDP is a simple transport-layer protocol . The application writes a datagram, encapsulated as either an IPv4 datagram or an IPv6 datagram, to a UDP socket. This is then sent to the destination. However, under UDP, there is no guarantee that the datagram will reach its final destination.