1. A disaster recovery method of recovering a process at a data center when a failure occurs at another data center during execution of the process, comprising steps of:
transmitting data at a first data center normally used to a second data center at a predetermined time interval and forming a backup of the received data at said second data center;
when a failure occurs at said first data center, selecting an information processing apparatus whose necessary recovery time including a time taken to input data still not backed up satisfies a predetermined requested recovery time, from information processing apparatuses in said second data center; and
deploying an application used at said first data center in said selected information apparatus and recovering the data at said first data center from said backup at said selected information processing apparatus.
2. A disaster recovery method according to claim 1, wherein:
said second data center calculates a first data amount obtained by multiplying the number of data generation frequencies representative of how many times the data at said first data center is generated per unit time, by said predetermined time interval of forming said backup; and
a time taken to input data of said first data amount into said second data center is used as the time taken to input said data still not backed up.
3. A disaster recovery method according to claim 1, wherein an end user of the application designates an allowable time taken to resume processing the application, and the allowable time is set as said predetermined requested recovery time.
4. A disaster recovery method according to claim 1, wherein said predetermined time interval of forming said backup is adjusted so that said necessary recovery time satisfies said predetermined requested time.
5. A disaster recovery method according to claim 1, wherein if there are a plurality of end users, the information processing apparatus in said second data center is selected in the order of a higher priority level of the application or the end user.
6. A disaster recovery method according to claim 1, wherein if there is an application for which the information processing apparatus in said second data center was not selected, another data center is inquired about whether the other data center can recover the data.
7. A disaster recovery system for recovering a process at a data center when a failure occurs at another data center during execution of the process, comprising:
a backup forming unit for transmitting data at a first data center normally used by an end user to a second data center at a predetermined time interval and forming a backup of the received data at said second data center;
an information processing apparatus selecting unit for, when a failure occurs at said first data center, selecting an information processing apparatus whose necessary recovery time including a time taken to input data still not backed up satisfies a predetermined requested recovery time, from information processing apparatuses in said second data center; and
a recovery unit for deploying an application used at said first data center in said selected information apparatus and recovering the data at said first data center from said backup at said selected information processing apparatus.
8. A disaster recovery system according to claim 7, wherein said information processing apparatus selecting unit receives an allowable time taken to resume processing the application designated by an end user of the application, and sets the allowable time as said predetermined requested recovery time.
9. A disaster recovery system according to claim 7, wherein said backup forming unit adjusts said predetermined time interval of forming said backup so that said necessary recovery time satisfies said predetermined requested time.
10. A disaster recovery system according to claim 7, wherein if there are a plurality of end users, said information processing apparatus selecting unit selects the information processing apparatus in said second data center in the order of a higher priority level of the application or the end user.
11. A disaster recovery system according to claim 7, wherein if there is an application for which the information processing apparatus in said second data center was not selected, said information processing selecting unit inquires another data center about whether the other data center can recover the data.
12. A storage medium storing a program for making computers function as a disaster recovery system for recovering a process at a data center when a failure occurs at another data center during execution of the process, wherein the computers are made to function as:
a backup forming unit for transmitting data at a first data center normally used by an end user to a second data center at a predetermined time interval and forming a backup of the received data at said second data center;
an information processing apparatus selecting unit for, when a failure occurs at said first data center, selecting an information processing apparatus whose necessary recovery time including a time taken to input data still not backed up satisfies a predetermined requested recovery time, from information processing apparatuses in said second data center; and
a recovery unit for deploying an application used at said first data center in said selected information apparatus and recovering the data at said first data center from said backup at said selected information processing apparatus.
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 microscope comprising:
a light source;
a condenser lens irradiating a sample with a light from the light source;
an objective facing the condenser lens across the sample;
a first polarization plate placed between the light source and the condenser lens;
a condenser turret placed between the first polarization plate and the condenser lens and having a plurality of optical elements placed inside;
a second polarization plate placed on an image side with respect to the objective; and
a compensator placed between the first polarization plate and the second polarization plate,
wherein
according to an observation method, an optical element to be placed in an optical path among the plurality of optical elements placed inside the condenser turret is switched by rotation of the condenser turret.
2. The microscope according to claim 1, wherein
the plurality of optical elements placed inside the condenser turret comprise:
an optical element for modulation contrast observation; and
an apertured plate for polarization observation.
3. The microscope according to claim 1, wherein
the compensator is placed between the condenser turret and the first polarization plate.
4. The microscope according to claim 1, wherein
distortion that each of the objective and the condenser lens has is 2 nm or less.
5. The microscope according to claim 1, wherein
the plurality of optical elements placed inside the condenser turret comprise:
an optical element for modulation contrast observation;
a first DIC prism for differential interference contrast observation; and
an apertured plate for polarization observation, and
the microscope further includes a second DIC prism placed detachably between the objective and the second polarization plate.
6. The microscope according to claim. 1, further comprising:
a first control unit configured to rotate the condenser turret in an electrically-driven manner;
a second control unit configured to change retardation of the compensator in an electrically-driven manner; and
a third control unit configured to rotate the first polarization plate in an electrically-driven manner.
7. The microscope according to claim. 6, further comprising:
a storing unit storing a setting for each observation method;
and wherein
when an observation method is specified, the third control unit changes a rotation angle of the first polarization plate, according to a setting of the specified observation method.
8. The microscope according to claim 7, further comprising
a optical path dividing unit configured to divide light from the sample and guide the light to an optical path for visual observation and an optical path for image capturing.
9. The microscope according to claim 8, further comprising
an apparatus configured to obtain an polarization observation image of an egg being the sample, to perform contrast highlighting processing to the polarization observation image, and to store an image after processing.
10. A microinsemination method using the microscope according to claim 1, comprising
adjusting a rotation angle of the first polarization plate and observing a form of an egg by modulation contrast observation in which a contrast is adjusted;
setting the first polarization plate and the second polarization plate in a crossed-Nicol condition and observing a spindle of the egg by polarization observation;
adjusting the rotation angle of the first polarization plate and performing microinsemination by modulation contrast observation in which a contrast is adjusted.
11. The microinsemination method according to claim 10, wherein
the modulation contrast observation and the polarization observation are performed without switching the objective.
12. The microinsemination method according to claim 10, wherein
the plurality of optical elements placed inside the condenser turret comprise:
an optical element for modulation contrast observation; and
an apertured plate for polarization observation, and
a rotation angle of the first polarization plate is changed in an electrically-driven manner.
13. A microscope performing modulation contrast observation, differential interference contrast observation and polarization observation selectively, comprising:
a light source;
a condenser lens irradiating a sample with a light from the light source;
an objective facing the condenser lens across the sample;
a first polarization plate placed between the light source and the condenser lens;
a condenser turret placed between the first polarization plate and the condenser lens;
a compensator placed between the first polarization plate and the condenser turret;
wherein
the condenser turret comprises a DIC prism and an optical element for modulation contrast;
according to an observation method, an optical element placed in an optical path inside the condenser turret is switched by rotation of the condenser turret; and
a contrast of an image of the sample is adjusted by changing retardation of the compensator.