Lanty Lanchuang Multimedia Electronic Classroom V5.0 Lanchuang Multimedia Electronic Classroom V5.0 Almighty Edition is a network application system based on TCP / IP and Win32 platform. It uses a set of software to introduce various multimedia information and controls such as film and television, graphics, images, sounds, animations, and texts into the teaching process in a computer classroom in real time and dynamically. , Network technology, multimedia technology, a systematic concept of modern teaching activities. It is worth mentioning that this version adds a variety of broadcasting methods, which can be full-screen broadcasting, designated area broadcasting, and designated program broadcasting, which is more convenient for teachers to interactively teach the live of the class. 1. Product Features Use TCP / IP communication protocol to fully support local area network (including Windows NT, Windows peer-to-peer network). Fully supports operating systems such as Windows 2000, Windows XP, Windows 2003 and Windows vista. Provide screen recording and playback functions, and the main control end can record its operation steps to make a file. Support multiple classes and multiple main control terminals to take classes at the same time, and group teaching can be conducted. The teaching mode is diverse and flexible. Video broadcasting can broadcast the images captured by the camera connected to the master terminal and the sound of the master terminal to the controlled terminal in real time. Broadcast, remote control speed is fast, achieve instant synchronization effect. The powerful screen recording function is convenient for teachers to prepare lessons. Efficient screen playback function gives teachers the greatest convenience. Simultaneous monitoring of up to 16 windows is supported, and the operation process of the controlled terminal can be recorded during monitoring. Real-time voice communication can be carried out to achieve voice classroom functions. The text interaction of the main controlled terminal is realized through the short message. Real-time transmission of online movie theater VCD and DVD programs without pauses. Second, exclusive features Provide a variety of wide-play modes, not only can provide a smooth full-screen broadcast method, but also specify an area on the screen to broadcast, in order to facilitate the teacher to use the software, also provides a specified program of broadcast, so that the teacher can specify the teaching The software can broadcast, for example, specify the screen broadcast of Word, specify the screen broadcast of Photoshop. Lanchuang Multimedia Electronic Classroom V5.0 software provides classroom questioning functions. Teachers can easily ask questions in the classroom. The system can support judgment questions, multiple choice questions, and question and answer questions. After the teacher asks the question, you can see the student's answer. When the question is finished, you can publish the correct answer, and the student can see the correct answer on the machine. Lanchuang Multimedia Electronic Classroom V5.0 software provides the function of real-time quiz. The teacher can compose the set test questions into a test paper for student quiz. After the quiz starts, the teacher can see the answer and score status of each student. Excellent broadcast performance The broadcast screen of the student machine has the same fluency as the screen of the teacher machine. The performance is excellent. It can directly broadcast the video playback content. Even the DVD quality can guarantee a good fluency. It perfectly supports AutoCAD, 3DMax, Protel, Geometry drawing board and other teaching software. The system supports the lock function of the student machine equipment, which can lock the USB port, floppy drive, optical drive and other devices on the student machine. The system provides a whitelist for accessing student computer applications and web pages, which can effectively control the access rights of student computers. The system provides the picture-in-picture function of the camera. When the teacher computer and a student computer perform video intercom, the teacher computer can realize the picture-in-picture function. The large picture is the student image, and the small picture in the lower right corner is the teacher image. 3. Main functions Main function part 1. Screen broadcast: You can transmit your screen to the controlled terminal that has logged in to this channel, and you can also send sound. The controlled terminal receiving the broadcast may be one, some or all. You can choose a variety of ways to broadcast through the on-screen broadcast toolbar, and let the controlled end watch and follow the operation. 2. Screen recording: You can record the changes of the computer screen of the main control terminal and broadcast it to the controlled terminal that has logged in to this channel. The controlled terminal can understand every step of the operation of the main control terminal. The recorded files can be stored for repeated use in the future. You can also record the sound of the main control terminal during recording. 3. Screen playback: It is to play back the recorded screen changes of the main control terminal. During playback, it can be broadcast to the controlled terminal to let the controlled terminal understand each step of the operation of the main control terminal. The controlled terminal receiving the broadcast may be one, some or all. 4. Visual intercom: Teachers can choose any logged-in student and their visual voice. If both sides are equipped with a camera intercom, then not only can they hear the other party's voice, but they can also see the other party's live video. Except for the teacher and this student, other students will not be disturbed. 5. Voice teaching: You can send your speech or other voice programs to the logged-in user, and can also have a two-way conversation with a controlled terminal. The users who receive voice instruction can be one, some or all. You can use the [Voice Teaching] button in the main function toolbar, function menu, and shortcut keys to perform voice teaching. 6. Remote monitoring: The screen monitoring function can continuously monitor the screen of the selected student computer. Each screen can monitor multiple students (can be set in the system settings). You can also set the interval between teacher monitor screen and screen in system settings. 7. Student demonstration: Student demonstration is to let a student operate the teacher's computer remotely and broadcast the process of the student's operation to other students selected. 8. Electronic roll call: Electronic roll call will require students to enter their own names, and the names they enter will be displayed under the student computer icon. And under the RecvFile directory of the teacher's machine, a directory named after the student is created. Can be used to access the work submitted by the student and documents received by the teacher 9. Group teaching: Group teaching is the function of teaching the group members by the team leader appointed by the teacher. Teachers can assign the selected functions to the team leader, so that the team leader can perform on-screen broadcasting, voice teaching, video teaching, group discussion, and video intercom to their team members. 10. Instant test: Teachers use it to conduct classroom tests on students. The test questions are objective questions, and when students submit their answers, the answer statistics section immediately shows the order of students ’answers, whether the answers are correct, whether the answers are correct. 11. Screen silence: The black screen silence can lock students' computers and prohibit students from operating. Extended function part: 1. Electronic whiteboard: The electronic whiteboard is used to assist teachers in assisting guidance when performing on-screen broadcasting or recording. Teachers can use it to annotate while operating, so as to emphasize the key points and make annotations. The electronic whiteboard can be used in conjunction with the on-screen broadcast, and can also be used with the projector for electronic blackboard writing or screen annotation. 2. Remote setting: the main control terminal can remotely set the login channel of the student computer, receive the file directory and disable certain functions. 3. Online discussion: The online discussion function enables multiple students and teachers to communicate with each other through voice, text, and drawing. Group discussion can allow multiple students to communicate in voice and drawing at the same time. 4. File distribution: Allow teachers to send files to the selected student computers (the default acceptance directory of student computers is the RecvFile directory under the installation directory). 5. File collection: Allow teachers to remotely collect the specified files and directories in student computers. 6. Short message: enables the master and the controlled to exchange messages with no more than 255 characters in real time; and can view, delete, save or reply to the messages sent by the controlled 7. Remote command: The main control terminal can activate various applications on the controlled terminal by sending commands. Accused 1. Electronic Raise Hand: Students can use the electronic raise hand to request the teacher to respond during the course. After the student presses the electronic raised hand, the message bar on the teacher program interface will be displayed instantly. 2. Assignment submission: Assignment submission is when the student sends the assignment file to the selected acceptance directory of the teacher computer. If a file with the same name already exists in the directory, the original file is automatically overwritten. Before submitting the assignment, please make sure that the disk space of the teacher computer is enough. 3. SMS sending: The student machine can send short messages to the teacher machine, and can promptly raise any questions. 4. Teaching content: On the student teaching content page, the teaching content published by the teacher will be displayed. 5. Logout: If the teacher does not set a security verification password for the student, after the student presses logout, the student exits the system. If the teacher sets a security verification password for the student, after the student presses quit, a dialog box will pop up to ask the student to enter the password. If the password is correct, the system can be exited; if the password is incorrect, the system cannot be exited. 4. System configuration requirements: Teacher machine: PC hardware and network Standard configuration: CPU CPU Celeron 800 RAM 128MB or above hard disk 10G or more free space Display / sound card 32M video memory, full duplex sound card operating system Windows 2000 series / Windows 2003 series / Windows XP series / Window VISTA series (if you need to support Win98, please use version 06) Recommended configuration: CPU CPU Pentium 1.2G or above, or other similar CPU RAM 256MB or more hard disk 40G or more Display / sound card INTEL high-speed integrated graphics, maximum sharing 128MB. The sound card is full-duplex and has an output recording function (it can record WAV files played by itself). operating system Windows 2000 series / Windows 2003 series / Windows XP series / Window VISTA series (if you need to support Win98, please use version 06) Student machine: PC hardware and network Standard configuration: CPU CPU Celeron 400 RAM 64MB or above hard disk 10G or more free space Display / sound card 8M video memory, full duplex sound card operating system Windows 2000 series / Windows 2003 series / Windows XP series / Window VISTA series (if you need to support Win98, please use version 06) Recommended configuration: CPU CPU Pentium 800 or above, or other similar CPU RAM 256MB or more hard disk 40G or more Display / sound card INTEL high-speed integrated graphics, maximum sharing 64MB. Sound card full duplex. operating system Windows 2000 series / Windows 2003 series / Windows XP series / Window VISTA series (if you need to support Win98, please use version 06)
Hypochlorous acid (HOCl or HClO) is a weak acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO−. HClO and ClO− are oxidizers, and the primary disinfection agents of chlorine solutions.[2] HClO cannot be isolated from these solutions due to rapid equilibration with its precursor. Sodium hypochlorite (NaClO) and calcium hypochlorite (Ca(ClO)2), are bleaches, deodorants, and disinfectants.
Hypochlorous acid was discovered in 1834 by the French chemist Antoine Jérôme Balard (1802–1876) by adding, to a flask of chlorine gas, a dilute suspension of mercury oxide in water.He also named the acid and its compounds.
In organic synthesis, HClO converts alkenes to chlorohydrins.
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In biology, hypochlorous acid is generated in activated neutrophils by myeloperoxidase-mediated peroxidation of chloride ions, and contributes to the destruction of bacteria.
In the cosmetics industry it is used on the skin.[citation needed] It is also used in baby products.[citation needed]
In food service and water distribution, specialized equipment to generate weak solutions of HClO from water and salt is sometimes used to generate adequate quantities of safe (unstable) disinfectant to treat food preparation surfaces and water supplies.
In water treatment, hypochlorous acid is the active sanitizer in hypochlorite-based products (e.g. used in swimming pools).
Similarly, in ships and yachts, marine sanitation devices use electricity to convert seawater into hypochlorous acid to disinfect macerated faecal waste before discharge into the sea.