9.1 Clocks

Dec 29, 2012

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~3500 BC: sundials~1500 BC: water clocks. History of timekeeping. Earliest clocks: Egypt. Modern timekeeping. 1500-1510: spring powered clocks (Henlein / Germany)1656, 1675: pendulum clocks, balance wheels (Hyugens, Netherlands)1920s ? : quartz clocks1949 ? : atomic clocks1967: Cesium clock bec

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9.1 Clocks

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Biological clocks

Biological clocks. Clock periods Circannual Circalunidian Circadian Clock mechanisms Entrainment Neural location Genetic basis. Hibernation follows annual rhythm in golden-mantled ground squirrels. Five animals were isolated at birth and kept in darkness at 3 o C.

531 views • 25 slides

Clocks

Clocks. Question:. You’re bouncing gently up and down at the end of a springboard, without leaving the board’s surface. If you bounce harder, the time it takes for each bounce will become shorter become longer remain the same. Observations About Clocks.

523 views • 17 slides

9.1

9.1. Doors. Curtains. Start. Goal. 9.2. N. Pond. Trees. (3). (2). (1). Food area. Bushes. Displaced to a new location. Typical entrance into the foraging area. 9.3. “A”. X. “G”. 9.4. 4.5 cm. 2.4 cm. Trial 2. Test. Trial 1. 9.5. 9.6. Phase 1. Phase 2. Choice Test.

272 views • 14 slides

CLOCKS

CLOCKS. The history and how they have changed. Sundial. The first clock Created by the Egyptians The Sun’s shadow told the time. Sundial. A sundial in Denver, CO! Cranmer Park . Water Clocks. Water Clocks are COOL!. Water Clock. Created by the Chinese Invented after the sundial

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CLOCKS

CLOCKS. By: Victoria Van.  Table of Contents  . The first clocks How the clock has improved Inventors of clocks . PARTAYYY!. The First Clocks #1. The first clocks were created in Egypt and China. Sundial- first clock used by Egyptians. Nickname “Shadow Clock.”

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Potato Clocks and Juice Clocks

Potato Clocks and Juice Clocks. By Katerina , Avery, Curt, and Shah. Potato Clock Theory. A potato is an electrochemical battery in which a chemical reaction occurs in a liquid between two different metals. .

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Molecular clocks

Molecular clocks. Molecular clock?. The molecular clock hypothesis was put forward by Zuckerkandl and Pauling in 1962. They noted that rates of amino acid replacements in animal hemoglobins were proportional to time of divergence—as judged from the fossil record. Molecular clocks?.

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System Clocks

System Clocks. System Clocks. The LPC23xx has two main internal clocks. The first is Cclk, the CPU clock, which is used to clock the ARM7 CPU and the AHB peripherals which include the USB controller, Ethernet controller and the general purpose DMA.

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CLOCKS

CLOCKS. Clocks: What is a clock? How does a biological clock compare with a mechanical clock? Why have a circadian clock? What are the properties of circadian clocks? How do we set the circadian clock?. CLOCKS. Measure Time. All clocks must have two basic components:

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9.1

9.1. Sampling Distributions. Parameter. A number that describes the population Symbols we will use for parameters include m - mean s – standard deviation p – proportion (p) a – y-intercept of LSRL b – slope of LSRL. Statistic.

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CLOCKs

CLOCKs. 鄭翔如 B9202090 陳偉傑 B9202060 董又誠 B9202079 劉哲維 B9202084. The History of Clocks. What time is it? Throughout the last 4,500 years or so, methods used to tell time have evolved greatly, and are still improving today.

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9.1

9.1. IDENTITIES, EXPRESSIONS, AND EQUATIONS. Deriving New Identities. Example 1 The Pythagorean identity, cos 2 θ + sin 2 θ = 1, can be rewritten in terms of other trigonometric functions. Provided cos θ ≠ 0 , dividing through by cos 2 θ gives

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9.1

Respiration and Motor System. 9.1. 9.1 The Importance of an Oxygen Delivery System. Breathing : is the process that brings O 2 into the lungs and expels CO 2 It uses the diaphragm (which pushes up) and intercostals muscles.

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-9.1%

A. -9.1%. -6.1%. -4.8%. B. -3.9%. -4.0%. -2.4%. -8.2%. C. WPD%. -3.7%. -3.6%. -3.2%. -2.8%. -17.4%. -2.1%. WPD%. -9.8%. -6.4%. -4.5%. -4.5%. -2.8%. WPD%.

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9.1 Clocks

9.1 Clocks. New ideas for today Resonance Harmonic oscillators Timekeeping. History of timekeeping. Earliest clocks: Egypt. ~3500 BC: sundials ~1500 BC: water clocks. Modern timekeeping. 1500-1510: spring powered clocks (Henlein / Germany)

581 views • 31 slides

CLOCKS

CLOCKS. The history and how they have changed. Sundial. The first clock Created by the Egyptians The Sun’s shadow told the time. Sundial. A sundial in Denver, CO! Cranmer Park. Water Clocks. Water Clocks are COOL!. Water Clock. Created by the Chinese Invented after the sundial

369 views • 19 slides

Reviewing Clocks

Teaching Concept #1. Reviewing Clocks. Teaching Concept #2. Telling Time to Five. Teaching Concept #2. Telling Time to 5. Teaching Concept #3. Reading the Clock. Teaching Concept #4. A.M. and P.M. School gets out in 30 minutes. It is 3:00 P.M. What time does school get out?. Application.

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§ 9.1

§ 9.1. Exponential Functions. Exponential Functions. Consider the function. Does this function look different from other functions we have worked with before? If you said, “yes” – you are right. It is different. The difference is that x is in the exponent – not the base.

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Commercial Clocks & Industrial Clocks Systems

All CEL clocks are designed and manufactured in the EU in accordance with the most stringent quality controls.http://celtime.co.uk/

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Custom Clocks | Colorful Clocks | Kid Clocks | Thank you Clocks Houston

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Clocks

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Logical Clocks

Logical Clocks. Topics. Logical clocks Totally-Ordered Multicasting Vector timestamps. Readings. Van Steen and Tanenbaum: 5.2 Coulouris: 10.4 L. Lamport, “Time, Clocks and the Ordering of Events in Distributed Systems,” Communications of the ACM, Vol. 21, No. 7, July 1978, pp. 558-565.

601 views • 55 slides

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