1. A language learning system comprising a plurality of student audio stations connected to a common digital storage unit, said student audio stations being able to simultaneously with but independently from each other store audio recordings to and play stored audio recordings from said common digital storage unit over a digital audio network having a connection unit comprising a dedicated port for each of said student stations and said common digital storage unit, said connection unit being enabled to route audio signals and commands in data packets between said student stations and said common digital storage unit, said common digital storage unit comprising:
a hard disk unit common to said plurality of student stations,
a plurality of dedicated inputoutput RAM buffers, wherein each student audio station is linked to different one of the dedicated inputoutput RAM buffers,
an audio interface controller responsive to a record command received from a student audio station for opening an audio file in said hard disk unit, for buffering audio data received from a student audio station in the respective one of said dedicated buffers and for transferring the contents of the buffer to said opened audio file,
said audio interface controller of said hard disk unit being responsive to a play command received from a student audio station for opening an audio file in said hard disk unit, for transferring stored audio data from said opened audio file to a respective inputoutput buffer, and for sending said audio data from said respective buffer to the respective student audio station which sent the play command, and
in addition to said plurality of inputoutput RAM buffers, a dedicated second inputoutput RAM buffer for each student station for recording a master program or played from another source into a respective second specified file andor playing a recorded master program or a saved media file from said respective second specified audio file.
2. A system as claimed in claim 1, wherein
said dedicated pair of first and second inputoutput RAM buffers of each student audio station can be controlled to record simultaneously, to play simultaneously, or one buffer to record and the other buffer to play to andor from separate audio files.
3. A system as claimed in claim 1, wherein said computer workstation is connected to said hard disk unit over a network other than said audio network.
4. A system as claimed in claim 1, wherein said connection unit is reconfigurable by a teacher workstation either directly or via said hard disk unit.
5. A system as claimed in claim 4, wherein said teacher workstation has a graphical user interface which employs an activity approach in controlling learning activities.
6. A system as claimed in claim 1, wherein said play command andor said record command is received from a respective student audio station or from a teacher’s computer workstation.
7. A system as claimed in claim 1, further comprising a second communication interface with a server entity for loading recorded student audio files from said digital storage unit andor for saving media files in said hard disk unit from a computer workstation.
8. A digital storage unit for a language learning system comprising a plurality of student audio stations connected to a common digital storage unit, said digital storage unit storing audio recordings and playing stored audio recordings for said student audio stations, said common digital storage unit comprises:
a hard disk unit common to said plurality of student stations,
an audio network interface connectable to a digital audio network via a connection unit comprising a dedicated port for each of said student stations and said digital storage unit, said connection unit being enabled to route digital audio signals and commands in data packets between said student stations and said digital storage unit,
a plurality of dedicated inputoutput RAM buffers, wherein each student audio station is linked to different one of the dedicated inputoutput RAM buffers such that each student audio station is able to store audio recordings to and play audio recordings from said hard disk unit through its dedicated inputoutput RAM buffer simultaneously with but independently from other student audio stations,
an audio interface controller enabled to, when a record command is received from a student audio station for opening an audio file in said hard disk unit, to buffer audio data received from a student audio station in the respective one of said dedicated buffers and for transferring the contents of the buffer to said opened audio file,
said audio interface controller enabled to, when a play command is received from a student audio station to open any audio file in said hard disk unit, for transferring stored audio data from said opened audio file to a respective inputoutput buffer, and for sending said audio data from said respective buffer to a respective student audio station which sent the play command, and
in addition to said plurality of dedicated inputoutput RAM buffers, a dedicated second inputoutput RAM buffer for each student station for recording a master program played from another source into a respective second specified file andor playing a recorded master program or a saved media file from said respective second specified audio file.
9. A unit as claimed in claim 8, wherein
said dedicated pair of first and second inputoutput RAM buffers of each student audio station can be controlled to record simultaneously, to play simultaneously, or one buffer to record and the other buffer to play to and respectively from separate audio files.
10. A unit as claimed in claim 8, further comprising a second communication interface with a server entity for loading recorded student audio files from said digital storage unit andor for saving media files in said hard disk unit from a computer workstation.
11. A language learning system comprising a plurality of student audio stations connected to a common digital storage unit, said student audio stations being able to simultaneously with but independently from each other store audio recordings to and play stored audio recordings from said digital storage unit, comprising
a digital audio network transferring digital audio signals and commands between the student audio stations and said common digital storage unit in form of data packets,
a connection unit comprising a dedicated port for each of said student stations and said digital storage unit, said connection unit being enabled to route digital audio signals and commends in data packets between said student stations and said common \u2018digital storage unit,
a hard disk unit in said digital storage unit,
a plurality of dedicated inputoutput RAM buffers in said common digital storage unit, wherein each student audio station is linked to different one of the dedicated inputoutput RAM buffers,
an audio interface controller in said common digital storage unit, said audio interface controller being responsive to a record command received from a student audio station for opening an audio file in said hard disk unit, for buffering audio data received from a student audio station in the respective one of said dedicated buffers and for transferring the contents of the buffer to said opened audio file,
said audio interface controller of said common digital storage unit being responsive to a play a play command received from a student audio station for opening any audio file in said hard disk unit, for transferring stored audio data from said opened audio file to a respective inputoutput buffer, and for sending said audio data from said respective buffer to a respective student audio station which sent the play command,
a second plurality of dedicated second inputoutput RAM buffers in said common digital storage unit, wherein each student audio station is linked to different one of the dedicated second inputoutput RAM buffers, said second inputoutput RAM buffer recording a master program played from another source into a respective second specified file andor playing a recorded master program or a saved media file from said respective second specified audio file in said hard disk unit,
said dedicated pair of first and second inputoutput RAM buffers of each student in said common digital storage unit can be controlled to record simultaneously, to play simultaneously, or one buffer to record and the other buffer to play to andor from separate audio files in said hard disk unit, and
said common digital storage unit further comprising a second communication interface with a server entity for loading recorded student audio files from said digital storage unit andor saving media files in said hard disk unit from a computer workstation.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process for treatment of water containing an azole-type anticorrosive for copper characterized by comprising adding ferrous ions to the water containing an azole-type anticorrosive for copper, and separating a resulting insoluble iron-azole complex.
2. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 1, characterized in that, after the insoluble iron-azole complex is separated, the remaining TOC components are subjected to ozonolysis.
3. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 1, characterized in that the water containing an azole-type anticorrosive for copper is water discharged from a chemical mechanical polishing step in a fabrication process of a semiconductor device.
4. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 1, characterized in that the azole-type anticorrosive for copper contains an azole compound, and the azole compound is at least one selected from the group consisting of imidazole, pyrazole, oxazole, isoxazole, thiazole, isothiazole, selenazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3-thiadiazole, 1,2,4-thiadiazole, 1,3,4-thiadiazole, tetrazole, 1,2,3,4-thiatriazole, derivatives thereof, amine salts thereof, and metal salts thereof.
5. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 4, characterized in that the water containing an azole-type anticorrosive for copper contains the azole compound in an amount of 5 to 30,000 mgL.
6. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 1, characterized in that the ferrous ions are added to the water containing an azole-type anticorrosive for copper by adding a ferrous salt comprising at least one of ferrous sulfate and ferrous chloride.
7. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 6, characterized in that the ferrous salt is added in an amount of 0.5 to 5.0 times, by molar ratio, the amount of the azole-type anticorrosive for copper in the water containing the azole-type anticorrosive for copper.
8. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 1, characterized in that the iron-azole complex is precipitated by adding ferrous ions to water containing the azole-type anticorrosive for copper with a pH of 4 to 8.
9. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 8, characterized in that, after the iron-azole complex is precipitated, the pH of the water is adjusted to 7 to 12, and the iron-azole complex is flocculated with iron hydroxide flocs.
10. The process for treatment of water containing an azole-type anticorrosive for copper according to claim 9, characterized in that, subsequently, a polymer flocculant is added to the water.