1. A mobile phone comprising:
a memory for storing phone numbers and predetermined messages;
a communication module capable of sending information wirelessly; and
a microprocessor capable of reading the phones numbers and sending the predetermined messages according to the phone numbers when the mobile phone is stolen.
2. The mobile phone according to claim 1, further comprising a scanner for scanning a fingerprint and generating a fingerprint scan.
3. The mobile phone according to claim 2, wherein the microprocessor comprises an analyzer unit for analyzing the fingerprint scan and generating fingerprint data corresponding to the fingerprint scan.
4. The mobile phone according to claim 3, wherein the memory further stores predetermined fingerprint data, and the microprocessor further comprises a compare unit for comparing the fingerprint data with the predetermined fingerprint data.
5. The mobile phone according to claim 4, wherein the microprocessor comprises a processor unit for reading the phone numbers and the predetermined messages from the memory, and sending them to the communication module when the fingerprint data is compared to be the same as the predetermined fingerprint data.
6. The mobile phone according to claim 1, further comprising a main power source detachably received in the mobile phone and a subsidiary power source fixed in the mobile phone.
7. The mobile phone according to claim 6, further comprising a power manager directly connected to the main power source and the subsidiary power source, and is capable of selecting power supply from the main power source and the subsidiary power source.
8. The mobile phone according to claim 7, wherein the power manager comprises a detector for detecting states of the main power source and the subsidiary power source and a management unit for distributing the power according to the detected states.
9. The mobile phone according to claim 8, further comprising a switch button directly connected to the microprocessor, wherein when the switch button is actuated the microprocessor signals the power manager to stop distributing the power.
10. The mobile phone according to claim 9, further comprising a scanner fixed on top of the switch button for scanning a fingerprint when the switch button is actuated.
11. The mobile phone according to claim 1, further comprising an input module for inputting the phone numbers and the predetermined messages.
12. A communication method used in powering off a mobile phone, the communication method comprising:
judging whether the mobile phone is stolen;
reading phone numbers and predetermined messages stored in the mobile phone if the mobile phone is stolen;
sending the predetermined messages according to phone numbers; and
powering off the mobile phone if the mobile phone is not stolen.
13. The communication method according to claim 12, further comprising:
actuating a switch button of the mobile phone when the mobile is in standby mode;
scanning a fingerprint, and generating a fingerprint scan according to the fingerprint;
generating a switch signal; and
stopping displaying according to the switch signal.
14. The communication method according to claim 13, further comprising:
analyzing the fingerprint scan and generating fingerprint data;
comparing the fingerprint data with predetermined fingerprint data stored in the mobile phone;
going to \u201creading phone numbers and predetermined messages stored in the mobile phone if the mobile phone is stolen\u201d step if the fingerprint data is substantially the same as the predetermined fingerprint data; and
going to \u201cpowering off the mobile phone if the mobile phone is not stolen\u201d if the fingerprint data is different from the predetermined fingerprint data.
15. The communication method according to claim 12, further comprising:
drawing power from a subsidiary power source of the mobile phone upon a condition that a sudden disconnection from the main power source;
going to \u201creading phone numbers and predetermined messages stored in the mobile phone if the mobile phone is stolen\u201d.
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 method for detecting presence of nucleic acid amplification in a test droplet, the method comprising:
providing a set of detection electrodes in contact with a fluidic channel;
providing the test droplet in vicinity of said set of detection electrodes through the fluidic channel;
applying an alternating current (AC) power at a first frequency across said set of detection electrodes;
obtaining a first measurement value reflecting electrical impedance of the test droplet at said first frequency;
comparing said first measurement value reflecting electrical impedance of the test droplet with a first corresponding reference value, wherein said first corresponding reference value is obtained by measuring a reference droplet containing known amplified nucleic acid or known unamplified nucleic acid in suspension within said reference droplet at said first frequency; and
determining presence of amplified nucleic acid in suspension within the test droplet based on said comparing.
2. The method as described in claim 1, wherein said set of electrodes comprises three planar gold electrodes.
3. The method as described in claim 1, wherein said reference droplet contains amplified DNA or RNA as a result of PCR.
4. The method as described in claim 1, wherein said fluidic channel comprises a constriction region over said set of detection electrodes.
5. The method as described in claim 1, wherein both said first measurement value and said first corresponding reference value are peak-to-peak voltages in respective measuring periods and derived by utilizing an impedance scope in combination with an current amplifier.
6. The method as described in claim 5, wherein said peak-to-peak voltages are derived from respective real time voltage\u02dctime plots produced by said impedance scope in combination with said current amplifier.
7. The method as described in claim 6,
wherein said set of detection electrodes comprise two groups of electrodes wherein the two groups share a common excitation or detection electrode; and
wherein obtaining said first measurement value further comprises a differential impedance measurement conducted across said two groups of detection electrodes respectively.
8. The method as described in claim 7 further comprising:
performing at least three additional differential impedance measurements on the test droplet at three additional frequencies conducted across said set of detection electrodes;
comparing peak-to-peak voltage values obtained from said three additional measurements with three corresponding reference values respectively, wherein said three corresponding reference values are obtained by measuring said reference droplet at said three additional frequencies respectively; and
determining presence of amplified nucleic acid in suspension within the test droplet by incorporating results from said three additional measurements.
9. The method as described in claim 8, wherein said first frequency and said additional frequencies are equal to 1.2 MHz, 5.2 MHz and 8 MHz and 10 MHz respectively.
10. The method as described in claim 6, wherein determining the presence of amplified nucleic acid in the test droplet is performed at substantially the same time as obtaining said first measurement value and said performing three additional differential impedance measurements.
11. The method as described in claim 1, where in the test droplet remains stationary while obtaining said first measurement value.
12. The method as described in claim 1, wherein said first measurement value reflecting electrical impedance of the test droplet is independent of the droplet size.
13. The method as described in claim 1 further comprising comparing said first measurement value reflecting electrical impedance of the test droplet with a second reference value obtained by measuring another reference droplet containing known non-amplified nucleic acid at the same AC power with said first frequency.
14. The method as described in claim 1, wherein said first measurement value reflecting electrical impedance is a magnitude of electrical impedance or real, or imaginary electrical impedance.
15. A system for detecting presence of nucleic acid amplification in a series of droplets, the system comprising:
a fluidic channel providing a plurality of test droplets of known sizes;
a set of detection electrodes disposed in contact with the fluidic channel;
an AC power supply operable to apply electrical powers across the set of detection electrodes at a plurality of known frequencies;
an impedance measurement device operable to measure electrical impedance of each of said series of test droplets; and
a processor operable to compare measured electrical impedance of each of said series of test droplets with corresponding reference electrical impedances and to determine presence of nucleic acid amplification in suspension within each of said series of test droplets based on comparison,
wherein the corresponding reference electrical impedances are obtained by measuring a reference droplet at said plurality of known frequencies respectively, and
wherein the corresponding reference droplet is of substantially the same size as the testing droplets and contains known amplified nucleic acid or known non-amplified nucleic acid in suspension within said reference droplet.
16. The system described as in claim 15 further comprising a thermocycling region for implementing PCR on said plurality of test droplets.
17. The system described as in claim 15 wherein the impedance measurement device comprises an impedance scope in combination with a current amplifier.
18. The system described as in claim 15 wherein the AC power supply is capable to supply AC powers to the set of electrodes at frequencies from 100 Hz to 50 MHz.
19. The system described as in claim 15 wherein the processor is capable of determining the presence of amplified nucleic acid in each of the test droplet in substantially real time based on the comparison between electrical impedances of said series of test droplets with corresponding reference electrical impedances.
20. A method for detecting presence of nucleic acid amplification in a test droplet, the method comprising:
providing a set of detection electrode within a fluidic channel,
providing said test droplet in vicinity of said set of electrodes through the fluidic channel;
applying high frequency power across said set of detection electrodes at four different frequencies in sequence;
measuring electrical impedances of the test droplet at said four frequencies by differential impedance measurements across said detection electrodes;
comparing the measured electrical impedances with corresponding reference electrical impedances obtained by measuring a reference droplet at said four different frequencies respectively, wherein the reference droplet is of substantially the same size as the testing droplet and contains known amplified nucleic acid or known unamplified nucleic acid;
determining the presence of amplified nucleic acid in suspension within the test droplet based on the comparison.
21. The method as described in claim 1, wherein said test droplet comprises solid phase particles operable for enhancing electrical impedance signals of said test droplet during said obtaining said first measurement value.
22. The method as described in claim 21, wherein said solid phase particles comprise nanoparticles.