Copyright © January 1988 $5

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Copyright © January 1988 $5"

Transcription

1 PASCO scientific B 모델 SF-9214에대한 9/91 사용설명서및실험가이드 정밀도 2.0 m 의에어트랙 Copyright January 1988 $5.00 1

2 장비 서론 PASCO 모델 SF-9214 에어트랙은 2.0m 길이로, 전체길이에대해 0.04mm 이내의범위까지진직도 (straightness) 가보증된다. 트랙은벽두께가 3mm인커다란사각알루미늄압출성형제품으로구성되어있으며, 벽은받침용 U자채널에의해한층더보강되어있다. 한쪽끝에는있는단일받침대와다른쪽끝에는있는이중받침대는에어트랙이 옆으로길게수평을이룰수있도록해준다. 개봉과설치 SF-9214 에어트랙은트랙이들어있는커다란튜브하나와부속품이들어있는 판지상자하나에담겨배송된다. 에어트랙이들어있는튜브의한쪽끝을천천히제거한다. 부착되어있는정렬용 빔과함께튜브에서트랙을조심스럽게당긴다. 주의 : 트랙의상부표면이긁히거나칼자국이나지않도록주의한다. ( 상부 표면에는공기구멍이있다.) 상부표면의융기는글라이더의운동을방해할수 있다. 구성품목 : 2 m 길이의에어트랙 부속품 : 봉투 : 깃발 (100 mm) 2 장 상부층 : 부속품트레이 1 개 2

3 에어트랙 봉투 상부충 중간층 하부층 부속품상자 3

4 중간층 : 글라이더 2개 설치용금속기구류 ( 단일지주 (leg) 나사 2개, 이중지주나사 2개, 4mm용렌치 (1), 5mm용렌치 (1)) 하부층 : 단일지주 1개 이중지주폭 (w)/ 조절용발 1개 정지장치 2개 필요한추가장비 : 공기공급장치 (Model SF-9416) 부속품트레이 바나나플러그가 부착되어있는도르래 1 개 50g 의글라이더용 추가질량체 (4PL) 바나나플러그가부착되어있는 고무밴드완충장치 (3PL) 정지장치설치용 나사 (4PL) 질량체걸이와질량체세트1개바나나플러그가부착되어있는후크연결장치 바나나플러그가부착되어있고왁스가채워져있는실린더 1개 바나나플러그와니들이부착되어있는 (needle on) 실린더 바나나플러그와완충장치날이부착되어있는실린더 (2PL) 4

5 장비설치 에어트랙조립하기 1. 제공된나사와앨렌렌치를이용하여그림 2 에서와같이에어트랙의 U 자형 채널에단일수평받침대 (foot) 와이중수평받침대를부착한다. 4mm 용앨렌렌치 조절용받침대 단일받침대 5mm 용앨렌렌치 브래킷 그림 2 수평받침대부착하기 2. 부속품트레이에포함되어있는설치용나사를이용하여에어트랙의양끝에 정지장치를설치한다. 정지장치 그림 3 정지장치설치하기 에어트랙의수평맞추기 5

6 에어트랙을평평하고안정된테이블위에올려놓고에어트랙이최대한수평이될 때까지 2 개의조절용받침대를돌린다. 공기방울수평계를이용하여트랙의수평을 대략적으로맞출수도있다. 그러나최종적으로수평을맞출때에는다음의방법으로맞추어야한다 : 1 에어트랙을에어공급장치에연결하고에어공급장치의전원을켠다. 2 초속 ( 初速 ) 이없는트랙가운데에글라이더를놓는다. 3 글라이더가어느방향으로도가속하지않고최초의위치에계속있을때까지수평나사를조절한다. 주의 : 글라이더가제자리에서약간진동할수도있다. 이러한움직임은트랙의 공기구멍으로들어오는기류에의해발생하는것이므로정상적인것으로간주한다. 에어공급장치조절하기 PASCO 모델 SF-9216 에어공급장치는트랙의한쪽끝에있는에어용부속품에의해에어트랙에연결되어있다. 글라이더가트랙위에거의떠있도록송풍기의출력을조절하여야한다. 과도한기압은가속력이없을때까지도트랙에서글라이더를벗어나게할수있다. 에어공급장치는에어트랙을약간가열시켜에어트랙을팽창시킨다. 에어 공급장치를 5 분간작동시킨후따뜻해졌을때, 트랙의진직도가 +/ mm 가 되도록, 트랙아래에는조절용빔이설치되어있다. 6

7 부속품 글라이더 양극처리된흑색알루미늄글라이더의질량은 180 g ± 1 g 이고길이는 129 mm ±1 mm 이다. 글라이더의질량을증가시키려면, 글라이더의양측면에튀어나와있는 강철핀에질량체를올려놓기만하면된다. 추가질량체 각 50 g 주의 : 질량체는항상대칭으로부착시켜야한다 ( 각측면에동일한수의질량체를 부착시켜야한다 ). 그렇게하지않으면글라이더가제대로작동하지않는다. 고무밴드완충장치와같은글라이더부속품은글라이더의각끝부분에있는구멍 중하나에설치한다. 주의 : 대부분의경우, 부속품은포토게이트의작동을방해하지않도록아래쪽 구멍에설치하여야한다. 이들부속품은글라이더의질량을증가시키므로, 모든계산시반드시고려해야 한다. 7

8 중요 : 글라이더의한쪽끝에부속품 ( 완충판과같은부속품 ) 을올려놓았으면, 반대쪽에도동일한질량의부속품 ( 완충장치나완충판과같은부속품 ) 을올려놓아야한다. 이렇게하면글라이더는에어트랙위에서계속수평을유지하며, 글라이더자체가어느한방향으로쏠리지않게된다. 깃발 포토게이트를이용하여글라이더의속도를측정할때에는각글라이더의상부 표면에 100 mm 의깃발을꽂아포토게이트의빔을차단한다. 글라이더자체를 깃발 로이용할수도있다. 서로다른길이의깃발이필요한 경우에는간단하게얇은판지나알루미늄을적당한길이로잘라서글라이더의상부 표면에테이프로붙이면된다. 주의 : 다음의부속품들은 4 mm 표준플러그를이용해에어트랙정지장치나글라이더에설치한다. 도르래를제외한각부속품의중량은약 10 g이다. 글라이더는항상각끝부위에는한개의부속품만을설치하여대칭이되게올려놓아야한다. 고무밴드완충장치 고무밴드완충장치는글라이더가다른글라이더나끝부분에충돌할때충돌을 완화시키고글라이더의진동을없애준다. 8

9 고무밴드완충장치를정지장치에설치하면글라이더발사장치로도이용할수있다 : 완충장치의끝부분에있는너트에닿을때까지글라이더를뒤로당긴다. 글라이더를놓는다. 고무밴드를완충장치에있는다른홈으로옮겨글라이더에가해지는추진력을변경한다. 완충판 9

10 이판은글라이더의끝부분에설치하며고무밴드완충장치와충돌하도록 설계되어있다. 왁스튜브와니들 왁스튜브는비탄성충돌이있는경우를대비해글라이더의끝부분에설치한다. 수 차례의충돌후에니들과적절한점착력을유지할수있도록튜브안에왁스를 집어넣는다 (be pressed). 니들은두번째글라이더의끝부분에설치한다. 니들은 2 개의글라이더가충돌할 때다른글라이더의왁스튜브에꽂혀 2 개의글라이더를단단하게결합시킬수 있게배치하여야한다. 주의 : 니들에는작은보호용코르크가끼워져있다. 니들을부속품트레이에 보관할때에는코르크를니들에다시끼워놓은다. 후크 후크는글라이더의끝부분이나윗부분에설치할수있다. 후크는글라이더에 스트링을연결할때사용한다. 10

11 도르래 도르래는에어의주입과는반대로, 정지장치하단의구멍에설치한다. 글라이더에 연결되어도르래를지나다른쪽끝부분에매달려있는질량체에연결된스트링을 이용하면글라이더를가속시킬수있다. 주의 : 글라이더를보호하려면, 정지장치에부딪히게해서는안된다. 11

12 고무밴드완충장치 이곳혹은이곳 에어트랙용질량체 / 걸이세트 2 g 의질량체걸이 2 g 의질량체 ( 플라스틱 ) 10 g 의질량체 ( 금속 ) 5 g 의질량체 ( 금속 ) 1 g 의질량체 ( 플라스틱 ) 12

13 유지보수 에어트랙 별다른유지보수작업없이에어트랙의표면을청결히하고긁히거나흠이나지않도록하면된다. 장치를보관할때에는반드시에어트랙의표면을훼손시킬수있는것이없는지확인한다. 트랙에흠이나서표면의융기가글라이더의자유로운움직임을방해하게되면, 줄이나사포로융기된표면을조심스럽게갈아낸다. PASCO 에어트랙은공장에서일직선으로조정되어출하되기때문에, 선형도 (linearity) 의편차는 ±0.04 mm이하이다. 장치의구조는트랙이다년간이사양범위내에서유지가되도록설계되었다. 그러나트랙에과도한힘을가하면, 일직선으로정렬된상태에서벗어날수있다. 이렇게되면글라이더가트랙을따라이동할때속도를고르지않게한다. 글라이더는트랙에생긴굴곡을가로지를때속도가빨라졌다느려진다. 이의가제기될만한제품을이용하여글라이더의운동이고르지않다면, 반드시에어트랙을재조정하여야한다. 에어트랙을재조정하는절차에는특수한시험도구가필요하다. 따라서자사는에어트랙을조정할수있도록 PASCO로장치를반송할것을권장한다. 에어트랙을반송하는데정보가필요한경우 PASCO scientific으로연락하도록한다. 글라이더 글라이더는에어트랙위에서마찰없이운동이유지될수있도록조심스럽게다루어야한다. 트랙에서글라이더가떠있는표면에긁힌자국이나흠이생기면, 줄이나사포로제거해야한다. 글라이더를떨어뜨리거나글라이더가구부러져있는경우에는글라이더의측면과에어트랙의측면이일치하도록글라이더를바로잡아야한다. 글라이더의양측사이의각이너무작으면글라이더가트랙에붙게된다. 또각이너무크면글라이더는트랙위를이동할때흔들리게된다. 고무밴드완충장치 고무밴드는시간이경과함에따라질이나빠질수있다. 고무밴드는바람직한 발사력과 탄력성 을발생시킬수있는신축밴드로교체할수있다. 13

14 주의 : 고무밴드의수명을연장시키려면, 사용하지않는때에는고무밴드 완충장치에서고무밴드를빼놓는다. 또한고무밴드를과도하게다루면고무코팅에 사용되는보호용분말이제거될수있다. 실험 에어트랙에서실시되는실험의특성은이용되는시간측정장치의작용이다. 그러므로, 실험은 PASCO 로부터구입이가능한다양한시간측정장치를포함한다. 다음의 PASCO 제품에제공되는사용설명서를참조하도록한다 : ME-9218 에어트랙과자급식포토게이트장치 ME-9394 에어트랙과컴퓨터포토게이트장치 (Apple II) ME-9363A 에어트랙과컴퓨터포토게이트장치 (IBM PC와호환가능 ) ME-9336 에어트랙과컴퓨터음파레인저장치 (Apple II) ME-9391 에어트랙과컴퓨터음파레인저장치 (IBM PC와호환가능 ) ME-9226 에어트랙과스파크타이머장치 ME-9206A 포토게이트타이머 ME-9215A 기억장치가내장된포토게이트타이머 PI-8025 카운터 / 타이머 / 주파수측정기 SF-9297 결합조화진동자 14

15 Includes Teacher s Notes and Typical Experiment Results Instruction Manual and Experiment Guide for the PASCO scientific Model ME-9215B B PHOTOGATE TIMER

16

17 B Photogate Timer Table of Contents Page Copyright, Warranty and Technical Support... ii Introduction... 1 Operation... 2 Accessories for the Photogate Timer Copy-Ready Experiments:... 4 Experiment 1: Instantaneous vs Average Velocity... 5 Experiment 2: Kinematics on an Inclined Plane... 7 Experiment 3: Speed of a Projectile... 9 Experiment 4: Newton's Second Law Experiment 5: The Force of Gravity Experiment 6: Conservation of Momentum Experiment 7: Kinetic Energy Experiment 8: Conservation of Mechanical Energy Experiment 9: Elastic-Kinetic Energy Experiment 10: Pendulum Motion Teachers Guide Maintenance i

18 Photogate Timer B Copyright, Warranty and Technical Support Copyright Notice The PASCO scientific B Instruction Manual is copyrighted with all rights reserved. Permission is granted to non-profit educational institutions for reproduction of any part of this manual, providing the reproductions are used only in their laboratories and classrooms, and are not sold for profit. Reproduction under any other circumstances, without the written consent of PASCO scientific, is prohibited. Limited Warranty For a description of the product warranty, see the PASCO catalog. Technical Support For assistance with any PASCO product, contact PASCO at: Address: PASCO scientific Foothills Blvd. Roseville, CA Phone: (worldwide) (U.S) FAX: (916) Web ii

19 B Photogate Timer Introduction The PASCO ME-9215B Photogate Timer is an accurate and versatile digital timer for the student laboratory. The ME-9215B memory function makes it easy to time events that happen in rapid succession, such as an air track glider passing twice through the photogate, once before and then again after a collision. The Photogate Timer uses PASCO s narrow-beam infrared photogate (see Figure 1) to provide the timing signals. An LED in one arm of the photogate emits a narrow infrared beam. As long as the beam strikes the detector in the opposite arm of the photogate, the signal to the timer indicates that the beam is unblocked. When an object blocks the beam so it doesn t strike the detector, the signal to the timer changes. The timer has several options for timing the photogate signals. The options include Gate, Pulse, and Pendulum modes, allowing you to measure the velocity of an object as it passes through the photogate or between two photogates, or to measure the period of a pendulum. There is also a START/STOP button that lets you use the timer as an electronic stopwatch. An important addition to your Photogate Timer is the ME-9204B Accessory Photogate, which must be ordered separately. It plugs directly into the Photogate Timer and triggers the timer in the same manner as the built-in photogate. In Pulse Mode, the Accessory Photogate lets you measure the time it takes for an object to travel between two photogates. In Gate mode, it lets you measure the velocity of the object as it passes through the first photogate, and then again when it passes through the second photogate. LED: Lights when beam is blocked Detector Plug in RJ12 connector from Photogate timer Infrared beam LED: Source of infrared beam Figure 1: The PASCO Photogate Head NOTES: The Photogate Timer can be powered using the included 7.5 V adapter. It will also run on 4 C-size, 1.5 Volt batteries. Battery installation instructions are in the Appendix. Ten ready-to-use experiments are included in this manual, showing a variety of ways in which you can use your Photogate Timer. The equipment requirements vary for different experiments. For many of the experiments, you will need an air track (dynamics carts will also work). Many also require a ME-9204B Accessory Photogate in addition to the Photogate Timer. Check the equipment requirements listed at the beginning of each experiment. 1

20 Photogate Timer B Operation Photogate Head Photogate beam Plug in RJ12 connector from timer Clamp screw: loosen to adjust photogate angle or height 7.5 volt power port Photogate port Rear panel Accessory photogate port 7.5 volt power adapter to 120 VAC, 60 Hz or 220/240 VAC, 50 Hz Figure 2: Setting Up the Photogate Timer To Operate the Photogate Timer: Plug the RJ12 phone connector from the timer into the RJ12 phone jack on the Photogate Head. Plug the 7.5 volt power adapter into the small receptacle on the rear of the timer and into a standard 110 VAC, 60 Hz (or 220/240 VAC, 50 Hz) wall outlet. Position the Photogate Head so the object to be timed will pass through the arms of the photogate, blocking the photogate beam. Loosen the clamp screw if you want to change the angle or height of the photogate, then tighten it securely. If you are using a ME-9204B Accessory Photogate, plug the stereo phone plug of the Accessory Photogate into the large receptacle (see Figure 2) on the rear of the timer. Slide the mode switch to the desired timing mode: Gate, Pulse, or Pendulum. Each of these modes is described below. Switch the MEMORY switch to OFF. Press the RESET button to reset the timer to zero. As a test, block the photogate beam with your hand to be sure that the timer starts counting when the beam is interrupted and stops at the appropriate time. Press the RESET button again. You are ready to begin timing. Timing Modes Gate Mode: In Gate mode, timing begins when the beam is first blocked and continues until the beam is unblocked. Use this mode to measure the velocity of an object as it passes through the photogate. If an object of length L blocks the photogate for a time t, the average velocity of the object as it passed through the photogate was L/t. Pulse Mode: In Pulse mode, the timer measures the time between successive interruptions of the photogate. Timing begins when the beam is first blocked and continues until the beam is unblocked and then blocked again. With an Accessory Photogate plugged into the Photogate Timer, the timer will measure the time it takes for an object to move between the two photogates. Pendulum Mode: In Pendulum mode, the timer measures the period of one complete oscillation. Timing begins as the pendulum first cuts through the beam. The timer ignores the next interruption, which corresponds to the pendulum swinging back in the opposite direction. Timing stops at the beginning of the third interruption, as the pendulum completes one full oscillation. Manual Stopwatch: Use the START/STOP button in either Gate or Pulse mode. In Gate mode the timer starts when the START/STOP button is pressed. The timer stops when the button is released. In Pulse mode, the timer acts as a normal stopwatch. It starts timing when the START/STOP button is first pressed and continues until the button is pressed a second time. TIMING DIAGRAMS The following diagrams show the interval, t, that is measured in each timing mode. In each diagram, a low signal corresponds to the photogate being blocked (or the START/STOP button pressed). A high signal corresponds to the photogate being unblocked (and the START/STOP button unpressed). MODE GATE PULSE PENDULUM DIAGRAM t t t t t t t t t t t 2

21 B Photogate Timer TIMING SUGGESTION Since the source and detector of the photogate have a finite width, the true length of the object may not be the same as the effective length seen by the photogate. This parallax error may be minimized by having the object pass as close to the detector side of the photogate as possible, with the line of travel perpendicular to the beam. To completely eliminate the parallax error in experimental data, determine the effective length of the object as follows: With the Timer in Gate mode, push the object through the photogate, along the path it will follow in the experiment. When the photogate is triggered (the LED on top of the photogate comes ON), measure the position of the object relative to an external reference point. Continue pushing the object through the photogate. When the LED goes OFF, measure the position of the object relative to the same external reference point. The difference between the first and second measurement is the effective length of the object. When measuring the speed of the object, divide this effective length by the time during which the object blocked the photogate. Memory Feature When two measurements must be made in rapid succession, such as measuring the pre- and post-collision velocities of an air track glider, use the memory function. It can be used in either the Gate or the Pulse mode. NOTE: If additional photogate interruptions occur after the second time is measured, and before the MEMORY switch is flipped to READ, they too will be measured by the timer and included in the cumulative time. Figure 3: Timing an Air Track Glider SPECIFICATIONS Detector rise time: 200 ns max. Fall Time: 200 ns max. Parallax error: For an object passing through the photogate, within 1 cm of the detector, with a velocity of less than 10 m/s, the difference between the true and effective length of the object will be less than 1 millimeter. Infrared source: Peak output at 880 nm; 10,000 hour life. To use the memory: Turn the MEMORY switch to ON. Press RESET. Run the experiment. When the first time (t 1 ) is measured, it will be immediately displayed. The second time (t 2 ) will be automatically measured by the timer, but it will not be shown on the display. Record t 1, then push the MEMORY switch to READ. The display will now show the TOTAL time, t 1 + t 2. Subtract t 1 from the displayed time to determine t 2. Figure 4: Photogate Timing a Pendulum 3

22 Photogate Timer B Accessories for the Photogate Timer The following accessories are available to help extend the utility of your model ME-9215B Photogate Timer. All the accessories work equally well with either model. See the current PASCO catalog for more information. ME-9204B Accessory Photogate The stereo phone plug of the ME-9204B Accessory Photogate plugs into the phone jack on the rear of the Photogate Timer, giving you two identical photogates operating from a single timer. With the timer in Gate mode, you can measure the velocity of an object as it passes through one photogate, then again as it passes through the second photogate. With the timer in Pulse mode, you can measure the time it takes for an object to pass between the two photogates. (Many of the experiments in this manual are most easily performed using a Photogate Timer with an Accessory Photogate.) ME-9207B Free Fall Adapter For easy and accurate measurements of the acceleration of gravity, the ME-9207B Free Fall Adapter is hard to beat. The Free Fall Adapter plugs directly into the phone plug on the rear of the Photogate Timer. It comes with everything you need, including two steel balls (of different size and mass), a release mechanism, and a receptor pad. The release mechanism and the receptor pad automatically trigger the timer, so you get remarkably accurate measurements of the free fall time of the steel ball. ME-9259A Laser Switch This highly collimated photodetector is identical to a photogate, except that you use a laser (not included) as the light source. You can now time the motion of objects that are far too big to fit through a standard photogate. Measure the period of a bowling ball pendulum or the velocity of a car. The Laser Switch operates in all three timing modes (Gate, Pulse, and Pendulum). 10 Copy-Ready Experiments The following 10 experiments are written in worksheet form. Feel free to photocopy them for use in your lab. NOTE: In each experiment, the first paragraph is a list of equipment needed. Be sure to read this paragraph first, as the equipment needs vary from experiment to experiment. This manual emphasizes the use of an air track, but the air track experiments can also be performed with dynamics carts. Many also require a ME-9204B Accessory Photogate in addition to a Photogate Timer. Collision experiments, such as experiments 6 and 7, require four times to be measured in rapid succession and are therefore most easily performed using two Photogate Timers. 4

23 B Photogate Timer Experiment 1: Instantaneous Versus Average Velocity EQUIPMENT NEEDED: - Photogate Timer with Accessory Photogate - Air Track System with one glider. Introduction An average velocity can be a useful value. If you know you will average 50 miles per hour on a 200 mile trip, it s easy to determine how long the trip will take. On the other hand, the highway patrolman following you doesn t care about your average speed over 200 miles. He wants to know how fast you re driving at the instant his radar strikes your car, so he can determine whether or not to give you a ticket. He wants to know your instantaneous velocity. In this experiment you ll investigate the relationship between instantaneous and average velocities, and see how a series of average velocities can be used to deduce an instantaneous velocity. Procedure D x 0 D/2 D/2 Set up the air track as shown in Figure 1.1, elevating one end of x the track with a 1-2 cm support. 1 Choose a point x 1 near the center of the track. Measure the position of x 1 on the air track metric scale, 1-2 cm support and record this value in Table 1.1. If you are using an air track without a scale, use a meter stick to Figure 1.1: Setting Up the Equipment measure the distance of x 1 from the edge of the upper end of the track. Choose a starting point x 0 for the glider, near the upper end of the track. With a pencil, carefully mark this spot on the air track so you can always start the glider from the same point. Place the Photogate Timer and Accessory Photogate at points equidistant from x 1, as shown in the figure. Record the distance between the photogates as D in Table 1.1. Set the slide switch on the Photogate Timer to PULSE. Press the RESET button. Hold the glider steady at x 0, then release it. Record time t 1, the time displayed after the glider has passed through both photogates. Repeat steps 6 and 7 at least four more times, recording the times as t 2 through t 5. Now repeat steps 4 through 9, decreasing D by approximately 10 centimeters. Continue decreasing D in 10 centimeter increments. At each value of D, repeat steps 4 through 8. Cardboard D Figure 1.2: Measuring Velocity in Gate Mode 5

24 Photogate Timer B Optional You can continue using smaller and smaller distances for D by changing your timing technique. Tape a piece of cardboard on top of the glider, as shown in Figure 1.2. Raise the photogate so it is the cardboard, not the body of the glider, that interrupts the photogate. Use just one photogate and place it at x 1. Set the timer to GATE. Now D is the length of the cardboard. Measure D by passing the glider through the photogate and noting the difference in glider position between where the LED first comes on, and where it goes off again. Then start the glider from x 0 as before, and make several measurements of the time it takes for the glider to pass through the photogate. As before, record your times as t 1 through t 5. Continue decreasing the value of D, by using successively smaller pieces of cardboard. Data and Calculations For each value of D, calculate the average of t 1 through t 5. Record this value as t avg. Calculate v avg = D/t avg. This is the average velocity of the glider in going between the two photogates. Plot a graph of v avg versus D with D on the x-axis. x 1 = Table 1.1 Data and Calculations D t 1 t 2 t 3 t 4 t 5 t avg v avg Questions Which of the average velocities that you measured do you think gives the closest approximation to the instantaneous velocity of the glider as it passed through point x 1? Can you extrapolate your collected data to determine an even closer approximation to the instantaneous velocity of the glider through point x 1? From your collected data, estimate the maximum error you expect in your estimated value. In trying to determine an instantaneous velocity, what factors (timer accuracy, object being timed, type of motion) influence the accuracy of the measurement? Discuss how each factor influences the result. Can you think of one or more ways to measure instantaneous velocity directly, or is an instantaneous velocity always a value that must be inferred from average velocity measurements? 6

25 B Photogate Timer Experiment 4: Newton s Second Law EQUIPMENT NEEDED: -Photogate timer with Accessory Photogate (or two Photogate Timers) -Air TrackSystem with one glider -Masses -Pulley -Pulley Mounting Clamp -Universal Table Clamp Introduction There s nothing obvious about the relationships governing the motions of objects. In fact, it took around 4,000 years of civilization and the genius of Isaac Newton to figure out the basic laws. Fortunately for the rest of us, hindsight is a powerful research tool. In this experiment you will experimentally determine Newton s second law by examining the motion of an air track glider under the influence of a constant force. The constant force will be supplied by the weight of a hanging mass that will be used to pull the glider. By varying the mass of the hanging weight and of the glider, and measuring the acceleration of the glider, you ll be able to determine Newton s second law. Procedure Counter Photogate Set up the air track as shown in Figure Balance x 0 Timer Hook 4.1. Level the air track very carefully by Glider String adjusting the air track leveling feet. A glider should sit on the track without accelerating in either direction. There may be some small movement of the glider due to unequal air flow beneath the glider, but it should not accelerate Figure 4.1: Equipment Setup steadily in either direction. Measure the effective length of the glider, and record your value as L in Table 4.1. Mount the hook into the bottom hole of the cart. To counterbalance its weight, add a piece of similar weight on the opposite end as shown on Fig Add grams of mass to the glider using 10 or 20 gram masses. Be sure the masses are distributed symmetrically so the glider is balanced. Determine the total mass of your glider with the added masses and record the total as m in Table 4.1. Place a mass of approximately 5-10 grams on the weight hanger. Record the total mass (hanger plus added mass) as m a. Set your Photogate Timer to GATE mode. Choose a starting point x 0 for the glider, near the end of the track. Mark this point with a pencil so that you can always start the glider from this same point. Press the RESET button. Hold the glider steady at x 0, then release it. Note t 1, the time it took for the glider to pass through the first photogate, and t 2, the time it took for the glider to pass through the second photogate. Repeat this measurement four times. Take the average of your measured t 1 's and t 2 's and record these averages as t 1 and t 2 in Table 4.1. panel Set the Photogate Timer to PULSE mode. 11 Press the RESET button. Accessory Photogate Tableclamp Pulley Mounting Rod m a 11

26 Photogate Timer B 12 Again, start the glider from x 0. This time measure and record t 3, the time it takes the glider to pass between the photogates. Repeat this measurement four more times and record the average of these measurements as t 3 in Table Vary m a, by moving masses from the glider to the hanger (thus keeping the total mass, m + m a, constant.) Record m and m a and repeat steps 5 through 11. Try at least four different values for m a. 14 Now leave m a constant at a previously used value. Vary m by adding or removing mass from the glider. Repeat steps Try at least four different values for m. Calculations For each set of experimental conditions: Use the length of the glider and your average times to determine v 1 and v 2, the average glider velocity as it passed through each photogate. Use the equation a = (v 2 - v 1 )/t 3 to determine the average acceleration of the glider as it passed between the two photogates. Determine F a, the force applied to the glider by the hanging mass. (F a = m a g; g = 9.8 m/s 2 = 980 cm/s 2 ) Analysis Draw a graph showing average acceleration as a function of applied force, F a,. Draw a second graph showing average acceleration as a function of the glider mass with M a being held constant. Examine your graphs carefully. Are they straight lines? Use your graphs to determine the relationship between applied force, mass, and average acceleration for the air track glider. Discuss your results. In this experiment, you measured only the average acceleration of the glider between the two photogates. Do you have reason to believe that your results also hold true for the instantaneous acceleration? Explain. What further experiments might help extend your results to include instantaneous acceleration? Glider Length, L = Table 4.1 Data and Calculations m m a t 1 t 2 t 3 v 1 v 2 a F a 12

27 B Photogate Timer Experiment 5: The Force of Gravity EQUIPMENT NEEDED: -Photogate timer with Accessory Photogate Introduction -Air Track System with one glider. In this experiment, you will use Newton s Second Law (F = ma) to measure the force exerted on an object by the Earth s gravitational field. Ideally, you would simply measure the acceleration of a freely falling object, measure its mass, and compute the force. However, the acceleration of a freely falling object is difficult to measure accurately. Accuracy can be greatly increased by measuring the much smaller acceleration of an object as it slides down an inclined plane. Figure 5.1 shows a diagram of the experiment. The gravitational force F g can be resolved into two components, one acting perpendicular and one acting parallel to the motion of the glider. Only the component acting along the direction of motion can accelerate the glider. The other component is balanced by the force from the air cushion of the track acting in the opposite direction. From the diagram, F = F g sin θ, where F g is the total gravitational force and F is the component that accelerates the glider. By measuring the acceleration of the glider, F can be determined and F g can be calculated. Force of air cushion pushing glider away from air track Glider Figure 5.1: Forces Acting on the Glider Procedure Set up the air track as shown in Figure 5.2. Remove the block and level the air track very D carefully. L Measure d, the distance between the air track support legs. Record this distance in the space on the following page. h{= Place a block of thickness h under the support d leg of the track. Measure and record h on the Figure 5.2: Equipment Setup following page. (For best results, measure h with calipers.) Measure and record D, the distance the glider moves on the air track from where it triggers the first photogate, to where it triggers the second photogate. (Move the glider and watch the LED on top of the photogate. When the LED lights up, the photogate has been triggered.) Measure and record L, the effective length of the glider. (Move the glider slowly through a photogate and measure the distance it travels from where the LED first lights up to where it just goes off.) Measure and record m, the mass of the glider. Set the Photogate Timer to GATE mode and press the RESET button. Hold the glider steady near the top of the air track, then release it so it glides freely through the photogates. Record t 1, the time during which the glider blocks the first photogate, and t 2, the time during which it blocks the second photogate. Use the memory function to determine each time. Repeat the measurement several times and record your data in Table 5.1. You needn t release the glider from the same point on the air track for each trial, but it must be gliding freely and smoothly (minimum wobble) as it passes through the photogates. ϑ F g Component of F g perpendicular to air track 13

28 Photogate Timer B Change the mass of the glider by adding weights and repeat steps 6 through 8. Do this for at least five different masses, recording the mass (m) for each set of measurements. (If you have time, you may also want to try changing the height of the block used to tilt the track.) Data and Calculations d = D = θ = h = L = Table 5.1 Data and Calculations m t 1 t 2 v 1 v 2 a a avg F g Calculate θ, the angle of incline for the air track, using the equation θ = tan -1 (h/d). For each set of time measurements, divide L by t 1 and t 2 to determine v 1 and v 2, the velocities of the glider as it passed through the two photogates. For each set of time measurements, calculate a, the acceleration of the glider, using the equation v v 1 2 = 2a(x 2 -x 1 ) = 2aD. For each value of mass that you used, take the average of your calculated accelerations to determine a avg. For each of your average accelerations, calculate the force acting on the glider along its line of motion (F = ma avg ). For each measured value of F, use the equation F = F g sin θ to determine F g. Construct a graph of F g versus m, with m as the independent variable (x-axis). Analysis Does your graph show a linear relationship between F g and m? Does the graph go through the origin? Is the gravitational force acting on the mass proportional to the mass? If so, the gravitational force can be expressed by the equation F g = mg, where g is a constant. If this is the case, measure the slope of your graph to determine the value of g. g = Questions In this experiment, it was assumed that the acceleration of the glider was constant. Was this a reasonable assumption to make? How would you test this? The equation v v 2 1 = 2a(x 2 -x 1 ) was used to calculate the acceleration. Under what conditions is this equation valid? Are those conditions met in this experiment? (You should be able to find a derivation for this equation in your textbook.) Could you use the relationsip F g = mg to determine the force acting between the Earth and the Moon? Explain. 14

29 B Photogate Timer Experiment 6: Conservation of Momentum EQUIPMENT NEEDED: -Air track system with two gliders Introduction -Two Photogate Timers. When objects collide, whether locomotives, shopping carts, or your foot and the sidewalk, the results can be complicated. Yet even in the most chaotic of collisions, as long as there are no external forces acting on the colliding objects, one principle always holds and provides an excellent tool for understanding the dynamics of the collision. That principle is called the conservation of momentum. For a two-object collision, momentum conservation is easily stated mathematically by the equation: p i = m 1 v 1i + m 2 v 2i = m 1 v 1f + m 2 v 2f = p f ; where m 1 and m 2 are the masses of the two objects, v 1i and v 2i are the initial velocities of the objects (before the collision), v 1f and v 2f are the final velocities of the objects, and p i and p f are the combined momentums of the objects, before and after the collision. In this experiment, you will verify the conservation of momentum in a collision of two airtrack gliders. Procedure Photogate 1 Photogate 2 Set up the air track and Glider 1 photogates as shown in Glider 2 Figure 6.1, using bumpers on the gliders to provide an elastic collision. Carefully level the track. Measure m 1 and m 2, the m 1 m 2 Figure 6.1: Equipment Setup masses of the two gliders to be used in the collision. Record your results in Table 6.1. Measure and record L 1 and L 2, the length of the gliders. (e.g., push glider 1 through photogate 1 and measure the distance it travels from where the LED comes on to where it goes off again.) Set both Photogate Timers to GATE mode, and press the RESET buttons. Place glider 2 at rest between the photogates. Give glider 1 a push toward it. Record four time measurements in Table 6.1 as follows: t 1i = the time that glider 1 blocks photogate 1 before the collision. t 2i = the time that glider 2 blocks photogate 2 before the collision. (In this case, there is no t 2i since glider 2 begins at rest.) t 1f = the time that glider 1 blocks photogate 1 after the collision. t 2f = the time that glider 2 blocks photogate 2 after the collision. IMPORTANT: The collision must occur after glider 1 has passed completely through photogate 1 and, after the collision, the gliders must be fully separated before either glider interrupts a photogate. NOTE: Use the memory function to store the initial times while the final times are being measured. Immediately after the final times are recorded, the gliders must be stopped to prevent them from triggering the photogate again due to rebounds. 15

30 Photogate Timer B Repeat the experiment several times, varying the mass of one or both gliders and varying the initial velocity of glider 1. Try collisions in which the initial velocity of glider 2 is not zero. You may need to practice a bit to coordinate the gliders so the collision takes place completely between the photogates. Data and Calculations For each time that you measured, calculate the corresponding glider velocity. (e.g., v 1i = ±L 1 /t 1i, where the velocity is positive when the glider moves to the right and negative when it moves to the left. Use your measured values to calculate p i and p f, the combined momentum of the gliders before and after the collision. Record your results in the table. Questions Table 6.1 Data and Calculations L 1 = L 2 = m 1 m 2 t 1i t 2i t 1f t 2f v 1i v 2i v 1f v 2f p i p f (m 1 v 1i + m 2 v 2i ) (m 1 v 1f + m 2 v 2f ) Was momentum conserved in each of your collisions? If not, try to explain any discrepancies. If a glider collides with the end of the air track and rebounds, it will have nearly the same momentum it had before it collided, but in the opposite direction. Is momentum conserved in such a collision? Explain. Suppose the air track was tilted during the experiment. Would momentum be conserved in the collision? Why or why not? Optional Equipment Design and conduct an experiment to investigate conservation of momentum in an inelastic collision in which the two gliders, instead of bouncing off each other, stick together so that they move off with identical final velocities. If you are using a PASCO airtrack, replace the bumpers with the wax and needle. Otherwise, velcro fasteners can be used with most gliders. 16

31 B Photogate Timer Experiment 7: Conservation of Kinetic Energy Introduction EQUIPMENT NEEDED: -Two Photogate Timers -Air Track System with two gliders. Momentum is always conserved in collisions that are isolated from external forces. Energy is also always conserved, but energy conservation is much harder to demonstrate since the energy can change forms: energy of motion (kinetic energy) may be changed into heat energy, gravitational potential energy, or even chemical potential energy. In the air track glider collisions you ll be investigating, the total energy before the collision is simply the kinetic energy of the gliders: 2 E k = (1/2)mv 1 + (1/2)mv 22. In this experiment you ll examine the kinetic energy before and after a collision to determine if kinetic energy is conserved in air track collisions. Procedure Photogate 1 Photogate 2 Bumpers Glider Set up the air track and 1 Glider 2 photogates as shown in m Figure 7.1, using bumpers 1 m 2 on the gliders to provide an elastic collision. Carefully level the track. Figure 7.1: Equipment Setup Measure m 1 and m 2, the masses of the two gliders to be used in the collision. Record your results in Table 7.1. Measure and record L 1 and L 2, the length of the gliders. (e.g., push glider 1 through photogate 1 and measure the distance it travels from where the LED comes on to where it goes off again.) Set both Photogate Timers to GATE mode, and press the RESET buttons. Place glider 2 at rest between the photogates. Give glider 1 a push toward it. Record four time measurements in Table 7.1 as follows: t 1i = the time that glider 1 blocks photogate 1 before the collision. t 2i = the time that glider 2 blocks photogate 2 before the collision. (In this case, there is no t 2i since glider 2 begins at rest.) t 1f = the time that glider 1 blocks photogate 1 after the collision. t 2f = the time that glider 2 blocks photogate 2 after the collision. IMPORTANT: The collision must occur after glider 1 has passed completely through photogate 1 and, after the collision, the gliders must be fully separated before either glider interrupts a photogate. NOTE: Use the memory function to store the initial times while the final times are being measured. Immediately after the final times are recorded, the gliders must be stopped to prevent them from triggering the photogate again due to rebounds. 17

32 Photogate Timer B Repeat the experiment several times, varying the mass of one or both gliders and varying the initial velocity of glider 1. Try collisions in which the initial velocity of glider 2 is not zero. You may need to practice a bit to coordinate the gliders so the collision takes place completely between the photogates. Data and Calculations For each time that you measured, calculate the corresponding glider velocity (e.g., v 1, = L 1 /t 1i ). Use your measured values to calculate E ki and E kf, the combined kinetic energy of the gliders before and after the collision. Record your results in the table. Table 7.1 Data and Calculations L 1 = L 2 = m 1 m 2 t 1i t 2i t 1f t 2f v 1i v 2i v 1f v 2f E ki E kf Questions Was kinetic energy conserved in each of your collisions? If there were one or more collisions in which kinetic energy was not conserved, where did it go? Optional Equipment Design and conduct an experiment to investigate conservation of kinetic energy in an inelastic collision in which the two gliders, instead of bouncing off each other, stick together so that they move off with identical final velocities. If you are using a PASCO air track, replace the bumpers with the wax and needle. Otherwise, velcro fasteners can be used with most gliders. 18

33 B Photogate Timer Experiment 8: Conservation of Mechanical Energy EQUIPMENT NEEDED: -Photogate timer and Accessory Photogate -air track system with one glider -block of wood of known thickness (approximately 1-2 cm). Introduction Though conservation of energy is one of the most powerful laws of physics, it is not an easy principle to verify. If a boulder is rolling down a hill, for example, it is constantly converting gravitational potential energy into kinetic energy (linear and rotational), and into heat energy due to the friction between it and the hillside. It also loses energy as it strikes other objects along the way, imparting to them a certain portion of its kinetic energy. Measuring all these energy changes is no simple task. This kind of difficulty exists throughout physics, and physicists meet this problem by creating simplified situations in which they can focus on a particular aspect of the problem. In this experiment you will examine the transformation of energy that occurs as an airtrack glider slides down an inclined track. Since there are no objects to interfere with the motion and there is minimal friction between the track and glider, the loss in gravitational potential energy as the glider slides down the track should be very nearly equal to the gain in kinetic energy. Stated mathematically: ΔE k =Δ(mgh)=mgΔh; 2 where Ek is the change in kinetic energy of the glider [ ΔE k = (1/2)mv 2 - (1/2)mv 12 ] and Δ(mgh) is the change in its gravitational potential energy (m is the mass of the glider, g is the acceleration of gravity, and Δh is the change in the vertical position of the glider). Procedure D Level the airtrack as accurately as possible. L Measure d, the distance between the air track support legs. Record this distance in Table 8.1. h{= Place a block of known thickness under the d support leg of the track. For best accuracy, the thickness of the block should be measured with calipers. Record the thickness of Table 8.1: Data and Calculations the block as h in Table 8.1. Setup the Photogate Timer and Accessory Photogate as shown in Figure 8.1. Measure and record D, the distance the glider moves on the air track from where it first triggers the first photogate, to where it first triggers the second photogate. (You can tell when the photogates are triggered by watching the LED on top of each photogate. When the LED lights up, the photogate has been triggered.) Measure and record L, the effective length of the glider. (The best technique is to move the glider slowly through one of the photogates and measure the distance it travels from where the LED first lights up to where it just goes off.) Measure and record m, the mass of the glider. Set the Photogate Timer to GATE mode and press the RESET button. Hold the glider steady near the top of the air track, then release it so it glides freely through the 19

34 Photogate Timer B photogates. Record t 1, the time during which the glider blocks the first photogate, and t 2, the time during which it blocks the second photogate. (If you have an ME-9215A Photogate Timer, the memory function will make it easier to measure the two times. If not, someone will need to watch the timer during the experiment and quickly record t1 before the glider reaches the second photogate.) Repeat the measurement several times and record your data in Table 8.1. You needn t release the glider from the same point on the air track for each trial, but it must be gliding freely and smoothly (minimum wobble) as it passes through the photogates. 11 Change the mass of the glider by adding weights and repeat steps 7 through 10. Do this for at least five different masses, recording the mass (m) for each set of measurements. (If you have time, you may also want to try changing the height of the block used to tilt the track or the distance between the photogates.) Table 8.1 Data and Calculations d = h = D = L = m = m θ t 1 t 2 v 1 v 2 E k1 E k2 Δ(mgh) Data and Calculations Calculate θ, the angle of incline for the air track, using the equation θ = arctan (h/d). For each set of time measurements: Divide L by t 1 and t 2 to determine v 1 and v 2, the velocity of the glider as it passed through each photogate. Use the equation E k = (1/2)mv 2 to calculate the kinetic energy of the glider as it passed through each photogate. Calculate the change in kinetic energy, ΔE k = E k2 - E k1. Calculate Δh, the distance through which the glider dropped in passing between the two photogates ( Δh = D sin θ, where θ = arctan h/d). Compare the dimetic energy gained wiht the loss in gravitational potential energy. Was mechanical energy conserved in the motion of the glider? 20

Microsoft PowerPoint - 7-Work and Energy.ppt

Microsoft PowerPoint - 7-Work and Energy.ppt Chapter 7. Work and Energy 일과운동에너지 One of the most important concepts in physics Alternative approach to mechanics Many applications beyond mechanics Thermodynamics (movement of heat) Quantum mechanics...

More information

Page 2 of 6 Here are the rules for conjugating Whether (or not) and If when using a Descriptive Verb. The only difference here from Action Verbs is wh

Page 2 of 6 Here are the rules for conjugating Whether (or not) and If when using a Descriptive Verb. The only difference here from Action Verbs is wh Page 1 of 6 Learn Korean Ep. 13: Whether (or not) and If Let s go over how to say Whether and If. An example in English would be I don t know whether he ll be there, or I don t know if he ll be there.

More information

Microsoft PowerPoint - ch03ysk2012.ppt [호환 모드]

Microsoft PowerPoint - ch03ysk2012.ppt [호환 모드] 전자회로 Ch3 iode Models and Circuits 김영석 충북대학교전자정보대학 2012.3.1 Email: kimys@cbu.ac.kr k Ch3-1 Ch3 iode Models and Circuits 3.1 Ideal iode 3.2 PN Junction as a iode 3.4 Large Signal and Small-Signal Operation

More information

Page 2 of 5 아니다 means to not be, and is therefore the opposite of 이다. While English simply turns words like to be or to exist negative by adding not,

Page 2 of 5 아니다 means to not be, and is therefore the opposite of 이다. While English simply turns words like to be or to exist negative by adding not, Page 1 of 5 Learn Korean Ep. 4: To be and To exist Of course to be and to exist are different verbs, but they re often confused by beginning students when learning Korean. In English we sometimes use the

More information

#Ȳ¿ë¼®

#Ȳ¿ë¼® http://www.kbc.go.kr/ A B yk u δ = 2u k 1 = yk u = 0. 659 2nu k = 1 k k 1 n yk k Abstract Web Repertoire and Concentration Rate : Analysing Web Traffic Data Yong - Suk Hwang (Research

More information

step 1-1

step 1-1 Written by Dr. In Ku Kim-Marshall STEP BY STEP Korean 1 through 15 Action Verbs Table of Contents Unit 1 The Korean Alphabet, hangeul Unit 2 Korean Sentences with 15 Action Verbs Introduction Review Exercises

More information

4 5 4. Hi-MO 애프터케어 시스템 편 5. 오비맥주 카스 카스 후레쉬 테이블 맥주는 천연식품이다 편 처음 스타일 그대로, 부탁 케어~ Hi-MO 애프터케어 시스템 지속적인 모발 관리로 끝까지 스타일이 유지되도록 독보적이다! 근데 그거 아세요? 맥주도 인공첨가물이

4 5 4. Hi-MO 애프터케어 시스템 편 5. 오비맥주 카스 카스 후레쉬 테이블 맥주는 천연식품이다 편 처음 스타일 그대로, 부탁 케어~ Hi-MO 애프터케어 시스템 지속적인 모발 관리로 끝까지 스타일이 유지되도록 독보적이다! 근데 그거 아세요? 맥주도 인공첨가물이 1 2 On-air 3 1. 이베이코리아 G마켓 용평리조트 슈퍼브랜드딜 편 2. 아모레퍼시픽 헤라 루즈 홀릭 리퀴드 편 인쇄 광고 올해도 겨울이 왔어요. 당신에게 꼭 해주고 싶은 말이 있어요. G마켓에선 용평리조트 스페셜 패키지가 2만 6900원! 역시 G마켓이죠? G마켓과 함께하는 용평리조트 스페셜 패키지. G마켓의 슈퍼브랜드딜은 계속된다. 모바일 쇼핑 히어로

More information

- 2 -

- 2 - - 1 - - 2 - - 3 - - 4 - - 5 - - 6 - - 7 - - 8 - - 9 - - 10 - - 11 - - 12 - - 13 - - 14 - - 15 - - 16 - - 17 - - 18 - - 19 - - 20 - - 21 - - 22 - - 23 - - 24 - - 25 - - 26 - - 27 - - 28 - - 29 - - 30 -

More information

- 이 문서는 삼성전자의 기술 자산으로 승인자만이 사용할 수 있습니다 Part Picture Description 5. R emove the memory by pushing the fixed-tap out and Remove the WLAN Antenna. 6. INS

- 이 문서는 삼성전자의 기술 자산으로 승인자만이 사용할 수 있습니다 Part Picture Description 5. R emove the memory by pushing the fixed-tap out and Remove the WLAN Antenna. 6. INS [Caution] Attention to red sentence 3-1. Disassembly and Reassembly R520/ 1 2 1 1. As shown in picture, adhere Knob to the end closely into the arrow direction(1), then push the battery up (2). 2. Picture

More information

대경테크종합카탈로그

대경테크종합카탈로그 The Series Pendulum Impact 601 & 602 Analog Tester For Regular DTI-602B (Izod) DTI-601 (Charpy) DTI-602A (Izod) SPECIFICATIONS Model DTI-601 DTI-602 Type Charpy for plastics lzod for plastics Capacity

More information

6자료집최종(6.8))

6자료집최종(6.8)) Chapter 1 05 Chapter 2 51 Chapter 3 99 Chapter 4 151 Chapter 1 Chapter 6 7 Chapter 8 9 Chapter 10 11 Chapter 12 13 Chapter 14 15 Chapter 16 17 Chapter 18 Chapter 19 Chapter 20 21 Chapter 22 23 Chapter

More information

2 min 응용 말하기 01 I set my alarm for 7. 02 It goes off. 03 It doesn t go off. 04 I sleep in. 05 I make my bed. 06 I brush my teeth. 07 I take a shower.

2 min 응용 말하기 01 I set my alarm for 7. 02 It goes off. 03 It doesn t go off. 04 I sleep in. 05 I make my bed. 06 I brush my teeth. 07 I take a shower. 스피킹 매트릭스 특별 체험판 정답 및 스크립트 30초 영어 말하기 INPUT DAY 01 p.10~12 3 min 집중 훈련 01 I * wake up * at 7. 02 I * eat * an apple. 03 I * go * to school. 04 I * put on * my shoes. 05 I * wash * my hands. 06 I * leave

More information

I&IRC5 TG_08권

I&IRC5 TG_08권 I N T E R E S T I N G A N D I N F O R M A T I V E R E A D I N G C L U B The Greatest Physicist of Our Time Written by Denny Sargent Michael Wyatt I&I Reading Club 103 본문 해석 설명하기 위해 근래의 어떤 과학자보다도 더 많은 노력을

More information

歯1.PDF

歯1.PDF 200176 .,.,.,. 5... 1/2. /. / 2. . 293.33 (54.32%), 65.54(12.13%), / 53.80(9.96%), 25.60(4.74%), 5.22(0.97%). / 3 S (1997)14.59% (1971) 10%, (1977).5%~11.5%, (1986)

More information

Coriolis.hwp

Coriolis.hwp MCM Series 주요특징 MaxiFlo TM (맥시플로) 코리올리스 (Coriolis) 질량유량계 MCM 시리즈는 최고의 정밀도를 자랑하며 슬러리를 포함한 액체, 혼합 액체등의 질량 유량, 밀도, 온도, 보정된 부피 유량을 측정할 수 있는 질량 유량계 이다. 단일 액체 또는 2가지 혼합액체를 측정할 수 있으며, 강한 노이즈 에도 견디는 면역성, 높은 정밀도,

More information

Stage 2 First Phonics

Stage 2 First Phonics ORT Stage 2 First Phonics The Big Egg What could the big egg be? What are the characters doing? What do you think the story will be about? (큰 달걀은 무엇일까요? 등장인물들은 지금 무엇을 하고 있는 걸까요? 책은 어떤 내용일 것 같나요?) 대해 칭찬해

More information

서강대학원123호

서강대학원123호 123 2012년 12월 6일 발행인 이종욱 총장 편집인 겸 주간 임종섭 편집장 김아영 (우편번호 121-742) 주소 서울시 마포구 신수동1번지 엠마오관 B133호 대학원신문사 전화 705-8269 팩스 713-1919 제작 일탈기획(070-4404-8447) 웃자고 사는 세상, 정색은 언행 총량의 2%면 족하다는 신념으로 살았습니다. 그 신념 덕분인지 다행히

More information

퇴좈저널36호-4차-T.ps, page 2 @ Preflight (2)

퇴좈저널36호-4차-T.ps, page 2 @ Preflight (2) Think Big, Act Big! Character People Literature Beautiful Life History Carcere Mamertino World Special Interview Special Writing Math English Quarts I have been driven many times to my knees by the overwhelming

More information

歯kjmh2004v13n1.PDF

歯kjmh2004v13n1.PDF 13 1 ( 24 ) 2004 6 Korean J Med Hist 13 1 19 Jun 2004 ISSN 1225 505X 1) * * 1 ( ) 2) 3) 4) * 1) ( ) 3 2) 7 1 3) 2 1 13 1 ( 24 ) 2004 6 5) ( ) ( ) 2 1 ( ) 2 3 2 4) ( ) 6 7 5) - 2003 23 144-166 2 2 1) 6)

More information

<B3EDB9AEC1FD5F3235C1FD2E687770>

<B3EDB9AEC1FD5F3235C1FD2E687770> 오용록의 작품세계 윤 혜 진 1) * 이 논문은 생전( 生 前 )에 학자로 주로 활동하였던 오용록(1955~2012)이 작곡한 작품들을 살펴보고 그의 작품세계를 파악하고자 하는 것이다. 한국음악이론이 원 래 작곡과 이론을 포함하였던 초기 작곡이론전공의 형태를 염두에 둔다면 그의 연 구에서 기존연구의 방법론을 넘어서 창의적인 분석 개념과 체계를 적용하려는

More information

204 205

204 205 -Road Traffic Crime and Emergency Evacuation - 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 Abstract Road Traffic Crime

More information

300 구보학보 12집. 1),,.,,, TV,,.,,,,,,..,...,....,... (recall). 2) 1) 양웅, 김충현, 김태원, 광고표현 수사법에 따른 이해와 선호 효과: 브랜드 인지도와 의미고정의 영향을 중심으로, 광고학연구 18권 2호, 2007 여름

300 구보학보 12집. 1),,.,,, TV,,.,,,,,,..,...,....,... (recall). 2) 1) 양웅, 김충현, 김태원, 광고표현 수사법에 따른 이해와 선호 효과: 브랜드 인지도와 의미고정의 영향을 중심으로, 광고학연구 18권 2호, 2007 여름 동화 텍스트를 활용한 패러디 광고 스토리텔링 연구 55) 주 지 영* 차례 1. 서론 2. 인물의 성격 변화에 의한 의미화 전략 3. 시공간 변화에 의한 의미화 전략 4. 서사의 변개에 의한 의미화 전략 5. 창조적인 스토리텔링을 위하여 6. 결론 1. 서론...., * 서울여자대학교 초빙강의교수 300 구보학보 12집. 1),,.,,, TV,,.,,,,,,..,...,....,...

More information

Microsoft PowerPoint - AC3.pptx

Microsoft PowerPoint - AC3.pptx Chapter 3 Block Diagrams and Signal Flow Graphs Automatic Control Systems, 9th Edition Farid Golnaraghi, Simon Fraser University Benjamin C. Kuo, University of Illinois 1 Introduction In this chapter,

More information

본문01

본문01 Ⅱ 논술 지도의 방법과 실제 2. 읽기에서 논술까지 의 개발 배경 읽기에서 논술까지 자료집 개발의 본래 목적은 초 중 고교 학교 평가에서 서술형 평가 비중이 2005 학년도 30%, 2006학년도 40%, 2007학년도 50%로 확대 되고, 2008학년도부터 대학 입시에서 논술 비중이 커지면서 논술 교육은 학교가 책임진다. 는 풍토 조성으로 공교육의 신뢰성과

More information

http://www.kbc.go.kr/pds/2.html Abstract Exploring the Relationship Between the Traditional Media Use and the Internet Use Mee-Eun Kang This study examines the relationship between

More information

6 영상기술연구 실감하지 못했을지도 모른다. 하지만 그 이외의 지역에서 3D 영화를 관람하기란 그리 쉬운 일이 아니다. 영화 <아바타> 이후, 티켓 파워에 민감한 국내 대형 극장 체인들이 2D 상영관을 3D 상영관으로 점차적으로 교체하는 추세이긴 하지만, 아직까지는 관

6 영상기술연구 실감하지 못했을지도 모른다. 하지만 그 이외의 지역에서 3D 영화를 관람하기란 그리 쉬운 일이 아니다. 영화 <아바타> 이후, 티켓 파워에 민감한 국내 대형 극장 체인들이 2D 상영관을 3D 상영관으로 점차적으로 교체하는 추세이긴 하지만, 아직까지는 관 아바타를 중심으로 본 3D 영화산업의 기술동향과 발전방향에 관한 연구 5 연구논문 연구논문 아바타를 중심으로 본 3D 영화산업의 기술동향과 발전방향에 관한 연구 진 승 현 동명대학교 미디어영상전공 교수 I. 서론 얼마 전 제 15회 신지식인 인증 및 시상식에서 대한민국의 대표 신지식인 대상을 영화 의 주경중 감독이 수상했다. 대한민국 3D 영화 제작의

More information

현대패션의 로맨틱 이미지에 관한 연구

현대패션의 로맨틱 이미지에 관한 연구 한지닥섬유제품의인체생리반응및쾌적성평가 임순 Evaluation of Thermal Physiological Responses and Comfort in Dox Fabric Soon Im Professor, Dept. of Fashion Industry, Incheon National University This study performed the evaluation

More information

- i - - ii - - iii - - iv - - v - - vi - - 1 - - 2 - - 3 - 1) 통계청고시제 2010-150 호 (2010.7.6 개정, 2011.1.1 시행 ) - 4 - 요양급여의적용기준및방법에관한세부사항에따른골밀도검사기준 (2007 년 11 월 1 일시행 ) - 5 - - 6 - - 7 - - 8 - - 9 - - 10 -

More information

전용]

전용] A Study of select the apropos processing mechanical method by the presume of transformation of teeth s surface degree ABSTRACT This study has been tried to select the apropos processing method by the

More information

` Companies need to play various roles as the network of supply chain gradually expands. Companies are required to form a supply chain with outsourcing or partnerships since a company can not

More information

<30322D28C6AF29C0CCB1E2B4EB35362D312E687770>

<30322D28C6AF29C0CCB1E2B4EB35362D312E687770> 한국학연구 56(2016.3.30), pp.33-63. 고려대학교 한국학연구소 세종시의 지역 정체성과 세종의 인문정신 * 1)이기대 ** 국문초록 세종시의 상황은 세종이 왕이 되면서 겪어야 했던 과정과 닮아 있다. 왕이 되리라 예상할 수 없었던 상황에서 세종은 왕이 되었고 어려움을 극복해 갔다. 세종시도 갑작스럽게 행정도시로 계획되었고 준비의 시간 또한 짧았지만,

More information

Å©·¹Àγ»Áö20p

Å©·¹Àγ»Áö20p Main www.bandohoist.com Products Wire Rope Hoist Ex-proof Hoist Chain Hoist i-lifter Crane Conveyor F/A System Ci-LIFTER Wire Rope Hoist & Explosion-proof Hoist Mono-Rail Type 1/2ton~20ton Double-Rail

More information

(Exposure) Exposure (Exposure Assesment) EMF Unknown to mechanism Health Effect (Effect) Unknown to mechanism Behavior pattern (Micro- Environment) Re

(Exposure) Exposure (Exposure Assesment) EMF Unknown to mechanism Health Effect (Effect) Unknown to mechanism Behavior pattern (Micro- Environment) Re EMF Health Effect 2003 10 20 21-29 2-10 - - ( ) area spot measurement - - 1 (Exposure) Exposure (Exposure Assesment) EMF Unknown to mechanism Health Effect (Effect) Unknown to mechanism Behavior pattern

More information

<32382DC3BBB0A2C0E5BED6C0DA2E687770>

<32382DC3BBB0A2C0E5BED6C0DA2E687770> 논문접수일 : 2014.12.20 심사일 : 2015.01.06 게재확정일 : 2015.01.27 청각 장애자들을 위한 보급형 휴대폰 액세서리 디자인 프로토타입 개발 Development Prototype of Low-end Mobile Phone Accessory Design for Hearing-impaired Person 주저자 : 윤수인 서경대학교 예술대학

More information

<C0C7B7CAC0C720BBE7C8B8C0FB20B1E2B4C9B0FA20BAAFC8AD5FC0CCC7F6BCDB2E687770>

<C0C7B7CAC0C720BBE7C8B8C0FB20B1E2B4C9B0FA20BAAFC8AD5FC0CCC7F6BCDB2E687770> ꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚ ꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏ 儀 禮 의 社 會 的 機 能 과 變 化 李 顯 松 裵 花 玉 ꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏ ꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚꠚ

More information

하나님의 선한 손의 도우심 이세상에서 가장 큰 축복은 하나님이 나와 함께 하시는 것입니다. 그 이 유는 하나님이 모든 축복의 근원이시기 때문입니다. 에스라서에 보면 하나님의 선한 손의 도우심이 함께 했던 사람의 이야기 가 나와 있는데 에스라 7장은 거듭해서 그 비결을

하나님의 선한 손의 도우심 이세상에서 가장 큰 축복은 하나님이 나와 함께 하시는 것입니다. 그 이 유는 하나님이 모든 축복의 근원이시기 때문입니다. 에스라서에 보면 하나님의 선한 손의 도우심이 함께 했던 사람의 이야기 가 나와 있는데 에스라 7장은 거듭해서 그 비결을 새벽이슬 2 0 1 3 a u g u s t 내가 이스라엘에게 이슬과 같으리니 그가 백합화같이 피 겠고 레바논 백향목같이 뿌리가 박힐것이라. Vol 5 Number 3 호세아 14:5 하나님의 선한 손의 도우심 이세상에서 가장 큰 축복은 하나님이 나와 함께 하시는 것입니다. 그 이 유는 하나님이 모든 축복의 근원이시기 때문입니다. 에스라서에 보면 하나님의 선한

More information

04-다시_고속철도61~80p

04-다시_고속철도61~80p Approach for Value Improvement to Increase High-speed Railway Speed An effective way to develop a highly competitive system is to create a new market place that can create new values. Creating tools and

More information

PJTROHMPCJPS.hwp

PJTROHMPCJPS.hwp 제 출 문 농림수산식품부장관 귀하 본 보고서를 트위스트 휠 방식 폐비닐 수거기 개발 과제의 최종보고서로 제출 합니다. 2008년 4월 24일 주관연구기관명: 경 북 대 학 교 총괄연구책임자: 김 태 욱 연 구 원: 조 창 래 연 구 원: 배 석 경 연 구 원: 김 승 현 연 구 원: 신 동 호 연 구 원: 유 기 형 위탁연구기관명: 삼 생 공 업 위탁연구책임자:

More information

H3050(aap)

H3050(aap) USB Windows 7/ Vista 2 Windows XP English 1 2 3 4 Installation A. Headset B. Transmitter C. USB charging cable D. 3.5mm to USB audio cable - Before using the headset needs to be fully charged. -Connect

More information

- iii - - i - - ii - - iii - 국문요약 종합병원남자간호사가지각하는조직공정성 사회정체성과 조직시민행동과의관계 - iv - - v - - 1 - - 2 - - 3 - - 4 - - 5 - - 6 - - 7 - - 8 - - 9 - - 10 - - 11 - - 12 - - 13 - - 14 - α α α α - 15 - α α α α α α

More information

untitled

untitled Chapter 5 Gases 3 5.1 2 NaN 3 (s) 2Na(s) + 3N 2 (g) Air bag 45.5L sodium azide?,,? 3 5.2 ? 1.,,, 2. P, V, n, T ( ) 3. 3 5.3 5.1,, = 1L = 10 3 cm 3 = 10-3 m 3 m=m n ( ) T k = t c + 273.15 : psi, mmhg, atm(

More information

K7VT2_QIG_v3

K7VT2_QIG_v3 1......... 2 3..\ 4 5 [R] : Enter Raid setup utility 6 Press[A]keytocreateRAID RAID Type: JBOD RAID 0 RAID 1: 2 7 " RAID 0 Auto Create Manual Create: 2 RAID 0 Block Size: 16K 32K

More information

(Table of Contents) 2 (Specifications) 3 ~ 10 (Introduction) 11 (Storage Bins) 11 (Legs) 11 (Important Operating Requirements) 11 (Location Selection)

(Table of Contents) 2 (Specifications) 3 ~ 10 (Introduction) 11 (Storage Bins) 11 (Legs) 11 (Important Operating Requirements) 11 (Location Selection) SERVICE MANUAL (Table of Contents) 2 (Specifications) 3 ~ 10 (Introduction) 11 (Storage Bins) 11 (Legs) 11 (Important Operating Requirements) 11 (Location Selection) 12 (Storage Bins) 12 (Ice Machine)

More information

1_2•• pdf(••••).pdf

1_2•• pdf(••••).pdf 65% 41% 97% 48% 51% 88% 42% 45% 50% 31% 74% 46% I have been working for Samsung Engineering for almost six years now since I graduated from university. So, although I was acquainted with the

More information

11¹Ú´ö±Ô

11¹Ú´ö±Ô A Review on Promotion of Storytelling Local Cultures - 265 - 2-266 - 3-267 - 4-268 - 5-269 - 6 7-270 - 7-271 - 8-272 - 9-273 - 10-274 - 11-275 - 12-276 - 13-277 - 14-278 - 15-279 - 16 7-280 - 17-281 -

More information

<BCF6BDC3323030392D31385FB0EDBCD3B5B5B7CEC8DEB0D4C5B8BFEEB5B5C0D4B1B8BBF3BFACB1B85FB1C7BFB5C0CE2E687770>

<BCF6BDC3323030392D31385FB0EDBCD3B5B5B7CEC8DEB0D4C5B8BFEEB5B5C0D4B1B8BBF3BFACB1B85FB1C7BFB5C0CE2E687770> ... 수시연구 2009-18.. 고속도로 휴게타운 도입구상 연구 A Study on the Concept of Service Town at the Expressway Service Area... 권영인 임재경 이창운... 서 문 우리나라는 경제성장과 함께 도시화가 지속적으로 진행되어 지방 지역의 인구감소와 경기의 침체가 계속되고 있습니다. 정부의 다각 적인

More information

Microsoft Word - Installation and User Manual_CMD V2.2_.doc

Microsoft Word - Installation and User Manual_CMD V2.2_.doc CARDMATIC CMD INSTALLATION MANUAL 씨앤에이씨스템(C&A SYSTEM Co., Ltd.) 본사 : 서울특별시 용산구 신계동 24-1(금양빌딩 2층) TEL. (02)718-2386( 代 ) FAX. (02) 701-2966 공장/연구소 : 경기도 고양시 일산동구 백석동 1141-2 유니테크빌 324호 TEL. (031)907-1386

More information

<313630313032C6AFC1FD28B1C7C7F5C1DF292E687770>

<313630313032C6AFC1FD28B1C7C7F5C1DF292E687770> 양성자가속기연구센터 양성자가속기 개발 및 운영현황 DOI: 10.3938/PhiT.25.001 권혁중 김한성 Development and Operational Status of the Proton Linear Accelerator at the KOMAC Hyeok-Jung KWON and Han-Sung KIM A 100-MeV proton linear accelerator

More information

0125_ 워크샵 발표자료_완성.key

0125_ 워크샵 발표자료_완성.key WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. WordPress is installed on a web server, which either is part of an Internet hosting service or is a network host

More information

기관고유연구사업결과보고

기관고유연구사업결과보고 기관고유연구사업결과보고 작성요령 2001 ~ 2004 2005 ~ 2007 2008 ~ 2010 2001 ~ 2004 2005 ~ 2007 2008 ~ 2010 1 2/3 2 1 0 2 3 52 0 31 83 12 6 3 21 593 404 304 1,301 4 3 1 8 159 191 116 466 6 11 (`1: (1: 16 33 44 106

More information

?????

????? 2013 May CONTENTS 04 06 20 23 24 28 40 44 48 49 50 52 54 56 Ideas that Move 6 SPECIAL CHEIL MAY 2013 7 Special 1 8 CHEIL MAY 2013 9 Special 2 10 CHEIL MAY 2013 11 12 CHEIL MAY 2013 13 Special 3 14 CHEIL

More information

<B1E2C8B9BEC828BFCFBCBAC1F7C0FC29322E687770>

<B1E2C8B9BEC828BFCFBCBAC1F7C0FC29322E687770> 맛있는 한국으로의 초대 - 중화권 음식에서 한국 음식의 관광 상품화 모색하기 - 소속학교 : 한국외국어대학교 지도교수 : 오승렬 교수님 ( 중국어과) 팀 이 름 : 飮 食 男 女 ( 음식남녀) 팀 원 : 이승덕 ( 중국어과 4) 정진우 ( 중국어과 4) 조정훈 ( 중국어과 4) 이민정 ( 중국어과 3) 탐방목적 1. 한국 음식이 가지고 있는 장점과 경제적 가치에도

More information

<313430333234C6AFC1FD28B0F1C7C1292E687770>

<313430333234C6AFC1FD28B0F1C7C1292E687770> 스포츠와 물리학: 구기운동 골프가 물리를 만나면 DOI: 10.3938/PhiT.23.008 김 선 웅 The Physics of Golf physics and to understand the importance of providing new physics textbooks based on the viewpoint of the Sun Ung KIM sportsman.

More information

레이아웃 1

레이아웃 1 i g d e d mod, t d e d e d mod, t e,0 e, n s,0 e,n e,0 Division of Workers' Compensation (2009). Iowa workers' compensation manual. Gamber, E. N. & Sorensen, R. L. (1994). Are net discount rates stationary?:

More information

<C0B1C1F6BFB5372E687770>

<C0B1C1F6BFB5372E687770> 191 [논 문] 형사소송법상 공소시효제도의 개선방안* 윤 지 영** 1) 차 례 Ⅰ. 서 론 Ⅳ. 형사소송법상 공소시효 기간의 개정 Ⅱ. 공소시효제도의 일반적 고찰 방향 Ⅲ. 형사소송법상 공소시효제도의 개선 필 Ⅴ. 결 론 요성과 도입 가능한 제도 Ⅰ. 서 론 지난해 한 방송국의 시사프로그램에서는 21세기 수사 기법으로 20세기의 살인마를 잡는다 는 슬로건

More information

Vertical Probe Card Technology Pin Technology 1) Probe Pin Testable Pitch:03 (Matrix) Minimum Pin Length:2.67 High Speed Test Application:Test Socket

Vertical Probe Card Technology Pin Technology 1) Probe Pin Testable Pitch:03 (Matrix) Minimum Pin Length:2.67 High Speed Test Application:Test Socket Vertical Probe Card for Wafer Test Vertical Probe Card Technology Pin Technology 1) Probe Pin Testable Pitch:03 (Matrix) Minimum Pin Length:2.67 High Speed Test Application:Test Socket Life Time: 500000

More information

석사논문.PDF

석사논문.PDF ABO Rh A study on the importance of ABO and Rh blood groups information in Public Health 2000 2 1 ABO Rh A study on the importance of ABO and Rh blood groups information in Public Health 2000 2 2 ABO Rh

More information

........pdf 16..

........pdf 16.. Abstract Prospects of and Tasks Involving the Policy of Revitalization of Traditional Korean Performing Arts Yong-Shik, Lee National Center for Korean Traditional Performing Arts In the 21st century, the

More information

<BABBB9AE2E687770>

<BABBB9AE2E687770> 253 단소산조 퉁소산조 피리산조 형성시기 재검토 49) 이진원* Ⅰ. 머리말 Ⅱ. 기존 연구성과 검토 Ⅲ. 단소산조 퉁소산조 피리산조 형성시기 검토 Ⅳ. 단소산조 퉁소산조 피리산조 형성시기 재검토의 의의 Ⅴ. 맺음말 Ⅰ. 머릿말 우리나라의 대표적인 종취관악기(縱吹管樂器)에는 무황악기(無簧樂器)인 퉁소 단소가 있 고, 유황악기(有簧樂器)로 피리와 쇄납 등이

More information

합격기원 2012년 12월 정기모의고사 해설.hwp

합격기원 2012년 12월 정기모의고사 해설.hwp 1 쪽 경찰학개론 -정답 및 해설- 본 문제의 소유권 및 판권은 윌비스경찰학원에 있습니다. 무단복사 판매시 저작권법에 의거 경고조치 없이 고발하여 민 형사상 책임을 지게 됩니다. 01. 3 3 경찰의 임무가 축소되면서 위생경찰, 건축경찰, 산림경찰 등처럼 다른 행정작용과 결합하여 특별한 사회적 이익의 보호를 목적으로 하면서 그 부수작용으로서 사회공공의 안녕과

More information

아니라 일본 지리지, 수로지 5, 지도 6 등을 함께 검토해야 하지만 여기서는 근대기 일본이 편찬한 조선 지리지와 부속지도만으로 연구대상을 한정하 기로 한다. Ⅱ. 1876~1905년 울릉도 독도 서술의 추이 1. 울릉도 독도 호칭의 혼란과 지도상의 불일치 일본이 조선

아니라 일본 지리지, 수로지 5, 지도 6 등을 함께 검토해야 하지만 여기서는 근대기 일본이 편찬한 조선 지리지와 부속지도만으로 연구대상을 한정하 기로 한다. Ⅱ. 1876~1905년 울릉도 독도 서술의 추이 1. 울릉도 독도 호칭의 혼란과 지도상의 불일치 일본이 조선 근대기 조선 지리지에 보이는 일본의 울릉도 독도 인식 호칭의 혼란을 중심으로 Ⅰ. 머리말 이 글은 근대기 일본인 편찬 조선 지리지에 나타난 울릉도 독도 관련 인식을 호칭의 변화에 초점을 맞춰 고찰한 것이다. 일본은 메이지유신 이후 부국강병을 기도하는 과정에서 수집된 정보에 의존하여 지리지를 펴냈고, 이를 제국주의 확장에 원용하였다. 특히 일본이 제국주의 확장을

More information

뉴욕 이코노믹클럽 연설을 통하여 비둘기파적 색채를 드러낸 옐런 Jr.Economist 전병하 2. 3779-8633 byunghajeon@ebestsec.co.kr 매크로 216. 3. 3 Implication Implication 현재 상황에 대한 인식 혼조적 - R

뉴욕 이코노믹클럽 연설을 통하여 비둘기파적 색채를 드러낸 옐런 Jr.Economist 전병하 2. 3779-8633 byunghajeon@ebestsec.co.kr 매크로 216. 3. 3 Implication Implication 현재 상황에 대한 인식 혼조적 - R 216년 3월 3일 매크로 전병하 경제/투자전략 뉴욕 이코노믹클럽 연설을 통하여 비둘기파적 색채를 드러낸 옐런 탐방 정홍식 유비쿼스 안정적인 네트워크 장비 업체 최석원 유니셈 업황 업데이트 이슈 (기업) 배은영 POSCO 영업 환경 및 실적 점검 성종화 엔씨소프트 주요 포인트 업데이트 이슈 (산업) 유지웅 자동차 전일 BYD 주가 급등, 앞으로 봐야할 것들

More information

Breathing problems Pa t i e n t: I have been having some breathing problems lately. I always seem to be out of breath no matter what I am d o i n g. ( Nurse : How long have you been experiencing this problem?

More information

2017.09 Vol.255 C O N T E N T S 02 06 26 58 63 78 99 104 116 120 122 M O N T H L Y P U B L I C F I N A N C E F O R U M 2 2017.9 3 4 2017.9 6 2017.9 7 8 2017.9 13 0 13 1,007 3 1,004 (100.0) (0.0) (100.0)

More information

Á¶´öÈñ_0304_final.hwp

Á¶´öÈñ_0304_final.hwp 제조 중소기업의 고용창출 성과 및 과제 조덕희 양현봉 우리 경제에서 일자리 창출은 가장 중요한 정책과제입니다. 근래 들어 우리 사회에서 점차 심각성을 더해 가고 있는 청년 실업 문제에 대처하고, 사회적 소득 양극화 문제에 대응하기 위해서도 일자리 창 출은 무엇보다도 중요한 정책과제일 것입니다. 고용창출에서는 중소기업의 역할이 대기업보다 크다는 것이 일반적

More information

한국성인에서초기황반변성질환과 연관된위험요인연구

한국성인에서초기황반변성질환과 연관된위험요인연구 한국성인에서초기황반변성질환과 연관된위험요인연구 한국성인에서초기황반변성질환과 연관된위험요인연구 - - i - - i - - ii - - iii - - iv - χ - v - - vi - - 1 - - 2 - - 3 - - 4 - 그림 1. 연구대상자선정도표 - 5 - - 6 - - 7 - - 8 - 그림 2. 연구의틀 χ - 9 - - 10 - - 11 -

More information

49-9분동안 표지 3.3

49-9분동안 표지 3.3 In the ocean, humans create many noises. These noises disturb the waters. People do not know that manmade sound harms the creatures living in the sea. In the end, disturbing the ocean affects each one

More information

00.1

00.1 HOSPA Chipboard screws with countersunk head Material: Drive: Cross recess PZ galvanized yellow chromatized nickel plated burnished Partly threaded, galvanized or yellow chromatized dk k L d m Head Ø dk

More information

<BFACBCBCC0C7BBE7C7D02831302031203139292E687770>

<BFACBCBCC0C7BBE7C7D02831302031203139292E687770> 延 世 醫 史 學 제12권 제2호: 29-40, 2009년 12월 Yonsei J Med Hist 12(2): 29-40, 2009 특집논문 3 한국사회의 낙태에 대한 인식변화 이 현 숙 이화여대 한국문화연구원 1. 들어가며 1998년 내가 나이 마흔에 예기치 않은 임신을 하게 되었을 때, 내 주변 사람들은 모두 들 너무나도 쉽게 나에게 임신중절을 권하였다.

More information

<3136C1FD31C8A320C5EBC7D52E687770>

<3136C1FD31C8A320C5EBC7D52E687770> 고속도로건설에 따른 지역간 접근성 변화분석 A study on the impact of new highway construction on regional accessibility The purpose of this is to analyse the interregional accessibility changes due to highway construction.

More information

6. Separate HDD by pulling in the arrow direction. * Cautions Avoid lifting HDD excessively, because Connector can be damaged ODD Remove

6. Separate HDD by pulling in the arrow direction. * Cautions Avoid lifting HDD excessively, because Connector can be damaged ODD Remove 3-1. Disassembly and Reassembly R510 [Caution] Attention to red sentence. 2 2 1. Before disassembling, the AC adaptor and Battery must be separated. 2. AS mark No.1/2 put KNOB-Battery to end of each side,

More information

<B3EDB9AEC1FD5F3235C1FD2E687770>

<B3EDB9AEC1FD5F3235C1FD2E687770> 경상북도 자연태음악의 소박집합, 장단유형, 전단후장 경상북도 자연태음악의 소박집합, 장단유형, 전단후장 - 전통 동요 및 부녀요를 중심으로 - 이 보 형 1) * 한국의 자연태 음악 특성 가운데 보편적인 특성은 대충 밝혀졌지만 소박집합에 의한 장단주기 박자유형, 장단유형, 같은 층위 전후 구성성분의 시가( 時 價 )형태 등 은 밝혀지지 않았으므로

More information

Output file

Output file 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 An Application for Calculation and Visualization of Narrative Relevance of Films Using Keyword Tags Choi Jin-Won (KAIST) Film making

More information

도비라

도비라 광고학연구 : 제24권 5호(2013년) The Korean Journal of Advertising, Vol.24, No.5 (2013). pp.99 116 대학생 광고공모전이 광고업계 취업에 미치는 영향: 대학생과 실무자의 인식 비교를 중심으로 차 유 철 우석대학교 광고이벤트학과 교수, 언론학박사 이 희 복 상지대학교 언론광고학부 교수, 언론학박사* 신

More information

2007 학년도 하반기 졸업작품 아무도 모른다 (Nobody Knows) 얄리, 보마빼 (AIi, Bomaye) 외계인간 ( 外 界 人 間 ) 한국예술종합학교 연극원 극작과 예술전문사 2005523003 안 재 승

2007 학년도 하반기 졸업작품 아무도 모른다 (Nobody Knows) 얄리, 보마빼 (AIi, Bomaye) 외계인간 ( 外 界 人 間 ) 한국예술종합학교 연극원 극작과 예술전문사 2005523003 안 재 승 2007 학년도 하반기 졸업작품 아무도 모른다 (Nobody Knows) 알리, 보마예 (Ali, Bomaye) 외계인간 ( 外 界 A 間 ) 원 사 3 승 극 문 연 전 재 E 숨 } 닮 런 예 m 안 합 과 ; 조 O 자 숨 그, 예 시 국 하 2007 학년도 하반기 졸업작품 아무도 모른다 (Nobody Knows) 얄리, 보마빼 (AIi, Bomaye)

More information

Product A4

Product A4 2 APTIV Film Versatility and Performance APTIV Film Versatility and Performance 3 4 APTIV Film Versatility and Performance APTIV Film Versatility and Performance 5 PI Increasing Performance PES PPSU PSU

More information

가정법( 假 定 法 )이란, 실제로 일어나지 않았거나 앞으로도 일어나지 않을 것 같은 일에 대해 자신의 의견을 밝히거나 소망을 표현하는 어법이다. 가정법은 화자의 심적 태도나 확신의 정도를 나타내는 어법이기 때문 에 조동사가 아주 요긴하게 쓰인다. 조동사가 동사 앞에

가정법( 假 定 法 )이란, 실제로 일어나지 않았거나 앞으로도 일어나지 않을 것 같은 일에 대해 자신의 의견을 밝히거나 소망을 표현하는 어법이다. 가정법은 화자의 심적 태도나 확신의 정도를 나타내는 어법이기 때문 에 조동사가 아주 요긴하게 쓰인다. 조동사가 동사 앞에 chapter 08 Subjunctive Mood Subjunctive Mood 가 정 법 UNIT 39 가정법 과거 UNIT 40 가정법 과거완료, 혼합 가정법 UNIT 41 I wish[as if, It s time] + 가정법 UNIT 42 주의해야 할 가정법 가정법( 假 定 法 )이란, 실제로 일어나지 않았거나 앞으로도 일어나지 않을 것 같은 일에 대해

More information

<313120B9DABFB5B1B82E687770>

<313120B9DABFB5B1B82E687770> 한국민족문화 40, 2011. 7, 347~388쪽 1)중화학공업화선언과 1973년 공업교육제도 변화* 2)박 영 구** 1. 머리말 2. 1973년, 중화학공업화선언과 과학기술인력의 부족 3. 1973년 전반기의 교육제도 개편과 정비 1) 계획과 개편 2) 기술교육 개선안과 인력개발 시책 4. 1973년 후반기의 개편과 정비 5. 정비된 정규교육제도의 특징

More information

저작자표시 - 비영리 - 변경금지 2.0 대한민국 이용자는아래의조건을따르는경우에한하여자유롭게 이저작물을복제, 배포, 전송, 전시, 공연및방송할수있습니다. 다음과같은조건을따라야합니다 : 저작자표시. 귀하는원저작자를표시하여야합니다. 비영리. 귀하는이저작물을영리목적으로이용할

저작자표시 - 비영리 - 변경금지 2.0 대한민국 이용자는아래의조건을따르는경우에한하여자유롭게 이저작물을복제, 배포, 전송, 전시, 공연및방송할수있습니다. 다음과같은조건을따라야합니다 : 저작자표시. 귀하는원저작자를표시하여야합니다. 비영리. 귀하는이저작물을영리목적으로이용할 저작자표시 - 비영리 - 변경금지 2.0 대한민국 이용자는아래의조건을따르는경우에한하여자유롭게 이저작물을복제, 배포, 전송, 전시, 공연및방송할수있습니다. 다음과같은조건을따라야합니다 : 저작자표시. 귀하는원저작자를표시하여야합니다. 비영리. 귀하는이저작물을영리목적으로이용할수없습니다. 변경금지. 귀하는이저작물을개작, 변형또는가공할수없습니다. 귀하는, 이저작물의재이용이나배포의경우,

More information

public key private key Encryption Algorithm Decryption Algorithm 1

public key private key Encryption Algorithm Decryption Algorithm 1 public key private key Encryption Algorithm Decryption Algorithm 1 One-Way Function ( ) A function which is easy to compute in one direction, but difficult to invert - given x, y = f(x) is easy - given

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA 27(2), 2007, 96-121 S ij k i POP j a i SEXR j i AGER j i BEDDAT j ij i j S ij S ij POP j SEXR j AGER j BEDDAT j k i a i i i L ij = S ij - S ij ---------- S ij S ij = k i POP j a i SEXR j i AGER j i BEDDAT

More information

#KM-235(110222)

#KM-235(110222) PARTS BOOK KM-235A/B INFORMATION A. Parts Book Structure of Part Book Unique code by mechanism Unique name by mechanism Explode view Ref. No. : Unique identifcation number by part Parts No. : Unique Product

More information

KM-380BL,BLB(100908)

KM-380BL,BLB(100908) PARTS BOOK KM-380BL KM-380BLB KM-380BL KM-380BLB MODEL FOR HEAVY MATERIAL KM-380BL CYLINDER-BED TYPE, 1-NEEDLE UNISON FEED, VERTICAL LARGE HOOK, LOCK-STITCH MACHINE. KM-380BLB CYLINDER-BED TYPE, 1-NEEDLE

More information

<31325FB1E8B0E6BCBA2E687770>

<31325FB1E8B0E6BCBA2E687770> 88 / 한국전산유체공학회지 제15권, 제1호, pp.88-94, 2010. 3 관내 유동 해석을 위한 웹기반 자바 프로그램 개발 김 경 성, 1 박 종 천 *2 DEVELOPMENT OF WEB-BASED JAVA PROGRAM FOR NUMERICAL ANALYSIS OF PIPE FLOW K.S. Kim 1 and J.C. Park *2 In general,

More information

장양수

장양수 한국문학논총 제70집(2015. 8) 333~360쪽 공선옥 소설 속 장소 의 의미 - 명랑한 밤길, 영란, 꽃같은 시절 을 중심으로 * 1)이 희 원 ** 1. 들어가며 - 장소의 인간 차 2. 주거지와 소유지 사이의 집/사람 3. 취약함의 나눔으로서의 장소 증여 례 4. 장소 소속감과 미의식의 가능성 5.

More information

PowerPoint 프레젠테이션

PowerPoint 프레젠테이션 Reasons for Poor Performance Programs 60% Design 20% System 2.5% Database 17.5% Source: ORACLE Performance Tuning 1 SMS TOOL DBA Monitoring TOOL Administration TOOL Performance Insight Backup SQL TUNING

More information

<C7D1B1B9B1A4B0EDC8ABBAB8C7D0BAB85F31302D31C8A35F32C2F75F303132392E687770>

<C7D1B1B9B1A4B0EDC8ABBAB8C7D0BAB85F31302D31C8A35F32C2F75F303132392E687770> 버스 외부 광고의 효과에 관한 탐색적 연구 : 매체 접촉률과 인지적 반응을 중심으로 1) 고한준 국민대학교 언론정보학부 조교수 노봉조 벅스컴애드 대표 이사 최근 몇 년 사이 옥외 광고나 인터넷 광고 등 BTL(Below the Line) 매체가 광고 시장에서 차지하 는 비중이 점점 높아지고 있다. 버스 외부 광고는 2004년 7월 서울시 교통체계개편 이후 이용자

More information

#KM560

#KM560 KM-560 KM-560-7 PARTS BOOK KM-560 KM-560-7 INFORMATION A. Parts Book Structure of Part Book Unique code by mechanism Unique name by mechanism Explode view Ref. No. : Unique identifcation number by part

More information

(specifications) 3 ~ 10 (introduction) 11 (storage bin) 11 (legs) 11 (important operating requirements) 11 (location selection) 12 (storage bin) 12 (i

(specifications) 3 ~ 10 (introduction) 11 (storage bin) 11 (legs) 11 (important operating requirements) 11 (location selection) 12 (storage bin) 12 (i SERVICE MANUAL N200M / N300M / N500M ( : R22) e-mail : jhyun00@koreacom homepage : http://wwwicematiccokr (specifications) 3 ~ 10 (introduction) 11 (storage bin) 11 (legs) 11 (important operating requirements)

More information

,,,.,,,, (, 2013).,.,, (,, 2011). (, 2007;, 2008), (, 2005;,, 2007).,, (,, 2010;, 2010), (2012),,,.. (, 2011:,, 2012). (2007) 26%., (,,, 2011;, 2006;

,,,.,,,, (, 2013).,.,, (,, 2011). (, 2007;, 2008), (, 2005;,, 2007).,, (,, 2010;, 2010), (2012),,,.. (, 2011:,, 2012). (2007) 26%., (,,, 2011;, 2006; ,,.. 400,,,,,,.,,, -, -, -., 3.. :, Tel : 010-9540-0640, E-mail : sunney05@hanmail.net ,,,.,,,, (, 2013).,.,, (,, 2011). (, 2007;, 2008), (, 2005;,, 2007).,, (,, 2010;, 2010), (2012),,,.. (, 2011:,, 2012).

More information

4 CD Construct Special Model VI 2 nd Order Model VI 2 Note: Hands-on 1, 2 RC 1 RLC mass-spring-damper 2 2 ζ ω n (rad/sec) 2 ( ζ < 1), 1 (ζ = 1), ( ) 1

4 CD Construct Special Model VI 2 nd Order Model VI 2 Note: Hands-on 1, 2 RC 1 RLC mass-spring-damper 2 2 ζ ω n (rad/sec) 2 ( ζ < 1), 1 (ζ = 1), ( ) 1 : LabVIEW Control Design, Simulation, & System Identification LabVIEW Control Design Toolkit, Simulation Module, System Identification Toolkit 2 (RLC Spring-Mass-Damper) Control Design toolkit LabVIEW

More information

<32B1B3BDC32E687770>

<32B1B3BDC32E687770> 008년도 상반기 제회 한 국 어 능 력 시 험 The th Test of Proficiency in Korean 일반 한국어(S-TOPIK 중급(Intermediate A 교시 이해 ( 듣기, 읽기 수험번호(Registration No. 이 름 (Name 한국어(Korean 영 어(English 유 의 사 항 Information. 시험 시작 지시가 있을

More information

2 동북아역사논총 50호 구권협정으로 해결됐다 는 일본 정부의 주장에 대해, 일본군 위안부 문제는 일 본 정부 군 등 국가권력이 관여한 반인도적 불법행위이므로 한일청구권협정 에 의해 해결된 것으로 볼 수 없다 는 공식 입장을 밝혔다. 또한 2011년 8월 헌 법재판소는

2 동북아역사논총 50호 구권협정으로 해결됐다 는 일본 정부의 주장에 대해, 일본군 위안부 문제는 일 본 정부 군 등 국가권력이 관여한 반인도적 불법행위이므로 한일청구권협정 에 의해 해결된 것으로 볼 수 없다 는 공식 입장을 밝혔다. 또한 2011년 8월 헌 법재판소는 일본군 위안부 피해자 구제에 관한 일고( 一 考 ) 1 일본군 위안부 피해자 구제에 관한 일고( 一 考 ) 김관원 / 동북아역사재단 연구위원 Ⅰ. 머리말 일본군 위안부 문제가 한일 간 현안으로 불거지기 시작한 것은 일본군 위안부 피해를 공개 증언한 김학순 할머니 등이 일본에서 희생자 보상청구 소송을 제 기한 1991년부터다. 이때 일본 정부는 일본군이 위안부

More information

슬라이드 1

슬라이드 1 CJ 2007 CONTENTS 2006 CJ IR Presentation Overview 4 Non-performing Asset Company Profile Vision & Mission 4 4 - & 4-4 - & 4 - - - - ROE / EPS - - DreamWorks Animation Net Asset Value (NAV) Disclaimer IR

More information

<32303131C7CFB9DDB1E22028C6EDC1FD292E687770>

<32303131C7CFB9DDB1E22028C6EDC1FD292E687770> 통일문제연구 2011년 하반기(통권 제56호) 전쟁 경험의 재구성을 통한 국가 만들기* - 역사/다큐멘터리/기억 - 1)이 명 자** Ⅰ. 들어가는 말 Ⅱ. 과 제작배경 Ⅲ. 과 비교 Ⅳ. 역사/다큐멘터리/기억 현대 남북한 체제 형성에서 주요한 전환점인 한국전 쟁은 해방 후 시작된 좌우대립과 정치적,

More information

산선생의 집입니다. 환영해요

산선생의 집입니다. 환영해요 Biped Walking Robot Biped Walking Robot Simulation Program Down(Visual Studio 6.0 ) ). Version.,. Biped Walking Robot - Project Degree of Freedom : 12(,,, 12) :,, : Link. Kinematics. 1. Z (~ Diablo Set

More information

원고스타일 정의

원고스타일 정의 논문접수일 : 2015.01.05 심사일 : 2015.01.13 게재확정일 : 2015.01.26 유니컨셉 디자인을 활용한 보행환경 개선방안 연구 A Study on Improvement of Pedestrian Environment on to Uniconcept Design 주저자 : 김동호 디지털서울문화예술대학교 인테리어실용미술학과 교수 Kim dong-ho

More information

슬라이드 제목 없음

슬라이드 제목 없음 물리화학 1 문제풀이 130403 김대형교수님 Chapter 1 Exercise (#1) A sample of 255 mg of neon occupies 3.00 dm 3 at 122K. Use the perfect gas law to calculate the pressure of the gas. Solution 1) The perfect gas law p

More information

<303220C7D1C5C2B9AE2E687770>

<303220C7D1C5C2B9AE2E687770> 한국민족문화 47, 2013. 5, 63~91쪽 통신사 사행록에 반영된 히로시마( 廣 島 )* 1)한 태 문** 1. 머리말 2. 통신사행에 있어서 히로시마의 역할 1) 사행의 水 路 노정 경유지 2) 정성을 다한 接 待 와 支 供 3. 사행록에 들어앉은 히로시마의 모습 1) 仙 境 으로 여겨진 빼어난 경치 2) 독특한 생활방식과 특산물로 이름난 공간 3)

More information

영어-중2-천재김-07과-어순-B.hwp

영어-중2-천재김-07과-어순-B.hwp Think Twice, Think Green 1 도와드릴까요? Listen and Speak 1 (I / you / may / help) 130,131 15 이 빨간 것은 어때요? (this / how / red / about / one) 16 오, 저는 그것이 좋아요. (I / it / oh / like) 2 저는 야구 모자를 찾고 있는데요. (a / looking

More information