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Artículos de revistas sobre el tema "Light motion"

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Autor: Grafiati

Publicado: 18 de mayo de 2024

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1

Smith, Russell. "Light Path". Journal of Early Modern Studies 8, n.º 2 (2019): 43–79. http://dx.doi.org/10.5840/jems20198212.

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This paper focuses on the mathematisation of mechanics in the seventeenth century, specifically on how the representation of compounded rectilinear motions presented in the ancient Greek Mechanica found its way into Newton’s Principia almost two thousand years later. I aim to show that the path from the former to the latter was optical: the conceptualisation of geometrical lines as paths of reflection created a physical interpretation of diagrammatic principles of geometrical point-motion, involving the kinematics and dynamics of light reflection. Upon the atomistic conception of light, the optical interpretation of such geometrical principles entailed their mechanical generalisation to local motion; rectilinear motion via the physico-mathematics of reflection and the Mechanica’s parallelogram rule; circular motion via the physico-mathematics of reflection, the Archimedean squaring of the circle and the Mechanica’s extension of the parallelogram rule to centripetal motion. This appeal to the physico-mathematics of reflection forged a realist foundation for the mathematisation of motion. Whereas Aristotle’s physics rested on motions which had their source in the nature of the elements, early modern thinkers such as Harriot, Descartes, and Newton based their new principles of mechanical motion upon selected elements of the mechanics of light motion, projected upon the geometry of the parallelogram rule for rectilinear and, ultimately, circular motion.

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2

Dixon, Richard N. "Light in motion". Nature 366, n.º 6451 (noviembre de 1993): 120. http://dx.doi.org/10.1038/366120a0.

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3

Korsunsky, Boris. "Satel-Light Motion". Physics Teacher 44, n.º 5 (mayo de 2006): 316. http://dx.doi.org/10.1119/1.2195409.

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4

Horiuchi, Noriaki. "Domain motion by light". Nature Photonics 9, n.º 5 (29 de abril de 2015): 283. http://dx.doi.org/10.1038/nphoton.2015.74.

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5

Hershenson, Maurice. "Structural Constraints: Further Evidence from Apparent Motion in Depth". Perception 22, n.º 3 (marzo de 1993): 323–34. http://dx.doi.org/10.1068/p220323.

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The three-dimensional (3-D) apparent motion of lines, outline triangles, and light points was studied in four experiments. The stimulus sequences were beginning and end patterns of 3-D motions of a line and a triangle. Light-point patterns corresponded to the ends of the lines and the vertices of the triangles. Perceived motion of lines and light-point pairs resembled the distal motions that were used to construct the proximal patterns. The correspondence was striking for configurations that appeared to move in depth. Outline triangles and light-point triplets produced a strong correspondence between distal and perceived motions when the three sides appeared to be translating in depth. The correspondence was reasonably good for the other motion patterns when scoring included an appropriate second category. The results support the conception of structural or internalized constraints: light points were processed as if they were connected (unity constraint) and proximal change in linear size (or distance between light points) was perceived as rigid 3-D motion (rigidity constraint).

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6

Alqattan, Husain, Dandan Hui, Vladimir Pervak y Mohammed Th Hassan. "Attosecond light field synthesis". APL Photonics 7, n.º 4 (1 de abril de 2022): 041301. http://dx.doi.org/10.1063/5.0082958.

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The advancement of the ultrafast pulse shaping and waveform synthesis allowed to coherently control the atomic and electronic motions in matter. The temporal resolution of the waveform synthesis is inversely proportional to the broadening of its spectrum. Here, we demonstrate the light field synthesis of high-power waveforms spanning two optical octaves, from near-infrared to deep-ultraviolet with attosecond resolution. Moreover, we utilized the all-optical field sampling metrology for on-demand tailoring of light field waveforms to control the electron motion in matter. The demonstrated synthesis of the light field and the electron motion control pave the way for switching the photo-induced current signal in dielectric nanocircuit and establishing ultrafast photonics operating beyond the petahertz speed.

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7

Laing, R. A. "Faster than light: superluminal motion and light echoes". Physics Education 32, n.º 1 (enero de 1997): 30–34. http://dx.doi.org/10.1088/0031-9120/32/1/016.

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8

Shiomi, Kazuyuki. "Simultaneity of light and motion". Physics Essays 25, n.º 2 (junio de 2012): 241–55. http://dx.doi.org/10.4006/0836-1398-25.2.241.

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9

Graziano, Gabriella. "Casting light on fast motion". Nature Reviews Chemistry 4, n.º 9 (7 de agosto de 2020): 439. http://dx.doi.org/10.1038/s41570-020-0216-x.

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10

Hutchinson, T. C., S. Ray Chaudhuri, F. Kuester y S. Auduong. "Light-Based Motion Tracking of Equipment Subjected to Earthquake Motions". Journal of Computing in Civil Engineering 19, n.º 3 (julio de 2005): 292–303. http://dx.doi.org/10.1061/(asce)0887-3801(2005)19:3(292).

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11

Beauchamp, Michael S., Kathryn E. Lee, James V. Haxby y Alex Martin. "fMRI Responses to Video and Point-Light Displays of Moving Humans and Manipulable Objects". Journal of Cognitive Neuroscience 15, n.º 7 (1 de octubre de 2003): 991–1001. http://dx.doi.org/10.1162/089892903770007380.

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We used fMRI to study the organization of brain responses to different types of complex visual motion. In a rapid eventrelated design, subjects viewed video clips of humans performing different whole-body motions, video clips of manmade manipulable objects (tools) moving with their characteristic natural motion, point-light displays of human whole-body motion, and point-light displays of manipulable objects. The lateral temporal cortex showed strong responses to both moving videos and moving point-light displays, supporting the hypothesis that the lateral temporal cortex is the cortical locus for processing complex visual motion. Within the lateral temporal cortex, we observed segregated responses to different types of motion. The superior temporal sulcus (STS) responded strongly to human videos and human point-light displays, while the middle temporal gyrus (MTG) and the inferior temporal sulcus responded strongly to tool videos and tool point-light displays. In the ventral temporal cortex, the lateral fusiform responded more to human videos than to any other stimulus category while the medial fusiform preferred tool videos. The relatively weak responses observed to point-light displays in the ventral temporal cortex suggests that form, color, and texture (present in video but not point-light displays) are the main contributors to ventral temporal activity. In contrast, in the lateral temporal cortex, the MTG responded as strongly to point-light displays as to videos, suggesting that motion is the key determinant of response in the MTG. Whereas the STS responded strongly to point-light displays, it showed an even larger response to video displays, suggesting that the STS integrates form, color, and motion information.

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12

Dittrich, Winand H. "Action Categories and the Perception of Biological Motion". Perception 22, n.º 1 (enero de 1993): 15–22. http://dx.doi.org/10.1068/p220015.

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Johansson filmed walkers and runners in a dark room with lights attached to their main joints and demonstrated that such moving light spots were perceived as human movements. To extend this finding the detection and recognition of Johansson displays of different kinds of movements under three light-spot conditions were studied to determine how human actions are perceived on the basis of biological-motion information. Locomotory, instrumental, and social actions were presented in each condition, namely in normal Johansson (light attached to joints), inter-joint (light attached between joints), and upside-down Johansson. Subjects' verbal responses and recognition times were measured. Locomotory actions were recognised better and faster than social and instrumental actions. Furthermore, biological motions were recognised much better and faster when the light-spot displays were presented in the normal orientation rather than upside down. Recognition rate was only slightly impaired under the inter-joint condition. It is argued that the perceptual analysis of actions and movements starts primarily on an intermediate level of action coding and comprises more than just the similarity of movement patterns or simple structures. Additionally, coding of dynamic phase relations and semantic coding take place at very early stages of the processing of biological motion. Implications of these results for computer vision, perceptual models, and mental representations are discussed.

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13

Fujimoto, Kiyoshi y Akihiro Yagi. "Biological Motion Alters Coherent Motion Perception". Perception 37, n.º 12 (1 de enero de 2008): 1783–89. http://dx.doi.org/10.1068/p5933.

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When a movie presents a person walking, the background appears to move in the direction opposite to the person's gait. This study verified this backscroll illusion by presenting a point-light walker against a background of a random-dot cinematogram (RDC). The RDC consisted of some signal dots moving coherently either leftward or rightward among other noise dots moving randomly. The method of constant stimuli was used to vary the RDC in motion coherence from trial to trial by manipulating the direction and percentage of the signal dots. Six observers judged the perceived direction of coherent motion in a two-alternative forced-choice procedure. Response rates for coherent motion perception in the direction opposite to walking were evaluated as a function of motion coherence. The results showed that the psychometric function shifted toward the direction determined by a bias in the opposite direction to the walker. The mean threshold was about half as high as that in a control condition in which the positions of the point-lights were scrambled to impair the recognition of the walker. The results demonstrate that biological motion noticeably affects the appearance of motion coherence in the background.

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14

Ciezadlo, Janina. "Almost Lost in Light and Motion". Afterimage 30, n.º 3-4 (2002): 17–18. http://dx.doi.org/10.1525/aft.2002.30.3-4.17a.

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15

TODA, Yasufumi y Yutaka ABE. "Did Light Crust Hamper Plate Motion?" Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 47, n.º 4 (1995): 423–29. http://dx.doi.org/10.4294/zisin1948.47.4_423.

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16

Harris, Glen I. y Warwick P. Bowen. "Quantum teleportation from light to motion". Nature Photonics 15, n.º 11 (27 de octubre de 2021): 792–93. http://dx.doi.org/10.1038/s41566-021-00896-7.

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17

Samperi, Mario, Bilel Bdiri, Charlotte D. Sleet, Robert Markus, Ajith R. Mallia, Lluïsa Pérez-García y David B. Amabilino. "Light-controlled micron-scale molecular motion". Nature Chemistry 13, n.º 12 (11 de octubre de 2021): 1200–1206. http://dx.doi.org/10.1038/s41557-021-00791-2.

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18

Wu, C. "Scattered Light Reveals Polymer Wave Motion". Science News 150, n.º 25/26 (21 de diciembre de 1996): 391. http://dx.doi.org/10.2307/3980064.

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19

Sewaiwar, Atul, Samrat Vikramaditya Tiwari y Yeon-Ho Chung. "Visible light communication based motion detection". Optics Express 23, n.º 14 (10 de julio de 2015): 18769. http://dx.doi.org/10.1364/oe.23.018769.

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20

Santos, P. V., N. M. Johnson y R. A. Street. "Light-enhanced hydrogen motion ina-Si:H". Physical Review Letters 67, n.º 19 (4 de noviembre de 1991): 2686–89. http://dx.doi.org/10.1103/physrevlett.67.2686.

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21

Anstis, S. y D. I. A. MacLeod. "Reversals of motion in dim light". Journal of Vision 5, n.º 12 (1 de diciembre de 2005): 13. http://dx.doi.org/10.1167/5.12.13.

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22

Schumacher, R. T. "Brownian motion by light scattering revisited". American Journal of Physics 54, n.º 2 (febrero de 1986): 137–41. http://dx.doi.org/10.1119/1.14709.

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23

Chernyak, V. G. y O. V. Klitenik. "Light-induced motion of aerosol particles". Journal of Aerosol Science 32 (septiembre de 2001): 539–74. http://dx.doi.org/10.1016/s0021-8502(01)00108-2.

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24

Travis, J. "Making Light Work of Brownian Motion". Science 267, n.º 5204 (17 de marzo de 1995): 1593–94. http://dx.doi.org/10.1126/science.267.5204.1593.

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25

Gegenfurtner, Karl R., Helmut M. Mayser y Lindsay T. Sharpe. "Motion perception at scotopic light levels". Journal of the Optical Society of America A 17, n.º 9 (1 de septiembre de 2000): 1505. http://dx.doi.org/10.1364/josaa.17.001505.

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26

Takeuchi, Tatsuto, Karen K. De Valois y Isamu Motoyoshi. "Light adaptation in motion direction judgments". Journal of the Optical Society of America A 18, n.º 4 (1 de abril de 2001): 755. http://dx.doi.org/10.1364/josaa.18.000755.

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27

Serva, Maurizio. "Random Motion of Light-Speed Particles". Journal of Statistical Physics 181, n.º 5 (28 de septiembre de 2020): 1603–8. http://dx.doi.org/10.1007/s10955-020-02638-5.

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28

Bolotovskii, B. M. y B. P. Bykov. "Emission accompanying superluminal motion of light". Journal of Soviet Laser Research 11, n.º 6 (1990): 527–44. http://dx.doi.org/10.1007/bf01120780.

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29

Dixit, G., O. Vendrell y R. Santra. "Imaging electronic quantum motion with light". Proceedings of the National Academy of Sciences 109, n.º 29 (2 de julio de 2012): 11636–40. http://dx.doi.org/10.1073/pnas.1202226109.

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30

Buttinoni, Ivo, Giovanni Volpe, Felix Kümmel, Giorgio Volpe y Clemens Bechinger. "Active Brownian motion tunable by light". Journal of Physics: Condensed Matter 24, n.º 28 (27 de junio de 2012): 284129. http://dx.doi.org/10.1088/0953-8984/24/28/284129.

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31

Treitel, Renata. "Light without Motion, by Giorgio Chiesura". Translation Review 32-33, n.º 1 (marzo de 1990): 63–65. http://dx.doi.org/10.1080/07374836.1990.10523493.

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32

Grossman, E. D. y R. Blake. "Perception of coherent motion, biological motion and form-from-motion under dim-light conditions". Vision Research 39, n.º 22 (noviembre de 1999): 3721–27. http://dx.doi.org/10.1016/s0042-6989(99)00084-x.

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33

Zeng, Jiqing y Tianhe Zeng. "The motion of massless “object” and the physical essence and motion law of light". Physics Essays 36, n.º 2 (17 de junio de 2023): 216–22. http://dx.doi.org/10.4006/0836-1398-36.2.216.

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In this paper, the vacuum absolute static reference system is established by analyzing the motion law of massless “object.” Through the understanding of the physical nature of light, this paper reveals three basic laws of motion of light: First, light always moves in a uniform straight line, independent of the motion of the light source. Second, the speed of light propagation in vacuum is constant relative to the absolute reference system of vacuum. Third, the speed of light propagation in the medium remains constant relative to the inertial frame of the medium. Based on this, we have successfully explained the phenomenon of Michelson‐Morley experiment, Fizeau experiment, and light aberration phenomenon that have long troubled the academic community. Finally, we prove that the two basic assumptions on which special relativity is based are wrong, so the Lorentz transformation and its series of inferences, as the core content of special relativity, are not tenable.

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34

Santo, Hiroaki, Michael Waechter, Wen-Yan Lin, Yusuke Sugano y Yasuyuki Matsushita. "Light Structure from Pin Motion: Geometric Point Light Source Calibration". International Journal of Computer Vision 128, n.º 7 (13 de marzo de 2020): 1889–912. http://dx.doi.org/10.1007/s11263-020-01312-3.

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35

Thornton, Ian M., Quoc C. Vuong y Heinrich H. Bülthoff. "A Chimeric Point-Light Walker". Perception 32, n.º 3 (marzo de 2003): 377–83. http://dx.doi.org/10.1068/p5010.

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Ambiguity has long been used as a probe into visual processing. Here, we describe a new dynamic ambiguous figure—the chimeric point-light walker—which we hope will prove to be a useful tool for exploring biological motion. We begin by describing the construction of the stimulus and discussing the compelling finding that, when presented in a mask, observers consistently fail to notice anything odd about the walker, reporting instead that they are watching an unambiguous figure moving either to the left or right. Some observers report that the initial percept fluctuates, moving first to the left, then to the right, or vice versa; others always perceive a constant direction. All observers, when briefly shown the unmasked ambiguous figure, have no difficulty in perceiving the novel motion pattern once the mask is returned. These two findings—the initial report of unambiguous motion and the subsequent ‘primed’ perception of the ambiguity—are both consistent with an important role for top–down processing in biological motion. We conclude by suggesting several domains within the realm of biological-motion processing where this simple stimulus may prove to be useful.

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36

Wilson, Robert, Sandhitsu Das, Maciej Lazarewicz y Leif Finkel. "Sensitivity to motion features in point light displays of biological motion". Spatial Vision 22, n.º 2 (2009): 105–25. http://dx.doi.org/10.1163/156856809787465627.

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37

Rahman, Gusairi, Nina Paramytha y Muhamad Ariandi. "Traffic Light Control Prototype Using PIR Motion and Microcontroller-Based Ultrasonic Sensors". Jurnal Sains dan Teknologi Industri 20, n.º 2 (15 de marzo de 2023): 773. http://dx.doi.org/10.24014/sitekin.v20i2.22095.

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Traffic lights at crossroads help regulate the flow of vehicles so they can run smoothly and avoid congestion. One of the causes of traffic congestion is a traffic control light system that is not optimal because it still uses a fixed timer system, so the lights' duration is less efficient in its application. When the green light is on, the streets are deserted. But there is a traffic jam on another road. Therefore the concept of traffic light timing needs to be developed to get efficient timing. This study aims to create a traffic light control system that uses a PIR (Passive Infrared) motion sensor and an ultrasonic sensor based on the Arduino Mega2560 microcontroller based on the congestion level. The method used in this traffic control prototype is an experimental method of reading vehicle objects mounted with PIR sensors and ultrasonic sensors. This system can detect the movement of vehicles approaching a traffic light, measure the distance between the car and the traffic light, and set the timing of the light signal according to the level of congestion detected. This system has been tested using vehicle movement simulations brought closer to the PIR and ultrasonic sensors at different distances. The test results show the system can work properly and produce the light signal according to the detected traffic conditions. For its application to traffic lights in the future, it is feasible to help the traffic unit.

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38

Stumpff, P. "Relativistic and perspective effects in proper motions and radial velocities of stars". Symposium - International Astronomical Union 114 (1986): 193–98. http://dx.doi.org/10.1017/s0074180900148181.

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The heliocentric motion of stars is investigated by taking into account all effects due to the geometry and due to the finite speed of light. It is shown that the proper motions as given in star catalogues contain the main light retardation term; an additional term of this type modifies Schlesinger's (1917) term but is less significant than a 3rd order perspective term neglected in conventional astrometry. Kapteyn's star serves as a numerical example. The ambiguous relativistic relation between Doppler shifts and radial velocities is discussed and demonstrated in a diagram. The ambiguity is solved with rigorous equations which allow to compute the inertial motion of a star from its proper motion, classical radial velocity, and distance. -

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39

LLARENS, Daniel. "General Theory for Light Propagation and the Motion of Bodies with Mass". International Journal of Science and Research (IJSR) 10, n.º 12 (5 de diciembre de 2021): 1247–54. http://dx.doi.org/10.21275/sr211226234901.

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40

Jing, Xiaobei, Xu Yong, Yinlai Jiang, Guanglin Li y Hiroshi Yokoi. "Anthropomorphic Prosthetic Hand with Combination of Light Weight and Diversiform Motions". Applied Sciences 9, n.º 20 (9 de octubre de 2019): 4203. http://dx.doi.org/10.3390/app9204203.

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Most prosthetic hands adopt an under-actuated mechanism to achieve dexterous motion performance with a lightweight and anthropomorphic design. Many have been verified in laboratories, and some have already been commercialized. However, a trade-off exists between the dexterity and the light weight of such prosthetic hands. In general, current commercially available prosthetic hands usually consider one aspect at the expense of the other, such as obtaining diversiform hand motions but an increased weight, or achieving lightweight design but with limited motion functions. This study attempts to attain a balance between the two factors, by realizing diversiform hand motions while reducing the weight as far as possible. An anthropomorphic prosthetic hand is proposed with only three servomotors embedded in a human-sized palm, with multiple functions, such as a stable/adaptive grasp and passive hyperextension. The proposed hand can achieve 13 grasp types with over 80% of the grasp motions under the Cutkosky taxonomy, while it weighs only 132.5 g, at less than 36% of the prosthesis weight limitation based on the study of Kay et al.

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41

Abdullah, Aziera, Siti Hajar Yusoff, Syasya Azra Zaini, Nur Shahida Midi y Sarah Yasmin Mohamad. "Energy efficient smart street light for smart city using sensors and controller". Bulletin of Electrical Engineering and Informatics 8, n.º 2 (1 de junio de 2019): 558–68. http://dx.doi.org/10.11591/eei.v8i2.1527.

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Smart street light is an intelligent control of street lights to optimize the problem of power consumption of the street, late in night. Conventional street lights are being replaced by Light Emitting Diode (LED) street lighting system, which reduces the power consumption. The focus of this project is to design a system of street lights controller to provide a reduction in power consumption. The prototype was designed by using Light Dependent Resistor (LDR), Infrared sensor (IR), battery and LED. The brightness of the lamps is being controlled in this project to reduce the power consumption. The dimming of the lamps depends on the speed of object motion detected such as pedestrians, cyclists and cars. The higher speed of moving object, the greater the level of intensity. For this idea, the innovation of street lights is not quite the same as conventional street lights that are controlled by timer switch or light sensor which automatically turns light on during sunset and off during sunrise. According to the study, motion detection devices may help to save up to 40% of energy per month.

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42

Borden, Amy E. "Shadows, Screens, Bodies, and Light". Screen Bodies 5, n.º 1 (1 de junio de 2020): 1–17. http://dx.doi.org/10.3167/screen.2020.050102.

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Considering how American publications wrote about x-ray, still, and photochemical motion pictures as shadows reveals a discursive bridge among the three varieties from the performance practice of ombromanie (shadowgraphy). This process produced shadows of performing bodies where the bodies were accompanied by the impression created by the interaction of the bodies and the light source. That organization of bodies and technology, as complex as a body and a fluoroscope or as low-tech as hands, a candle, and a screen, can help historians contextualize popular narratives of early cinema that suggested audiences believed that motion pictures were real enough to jump offscreen. The resulting images drag the profilmic event and the peculiarities of the medium into a cultural understanding of cinema’s potential to both represent and display life in motion.

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43

Roobini, M. S., L. Suji Helen, A. Viji Amutha Mary, Mercy Paul Selvan y S. Jancy. "Automatic Motion Triggered Street Light Using IoT". Journal of Physics: Conference Series 1770, n.º 1 (1 de marzo de 2021): 012029. http://dx.doi.org/10.1088/1742-6596/1770/1/012029.

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44

Bykov, Vladimir P. "Squeezed light and nonclassical motion in mechanics". Uspekhi Fizicheskih Nauk 163, n.º 9 (1993): 89. http://dx.doi.org/10.3367/ufnr.0163.199309d.0089.

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45

Vasileiadis, Thomas, Tommaso Marchesi D’Alvise, Clara-Magdalena Saak, Mikolaj Pochylski, Sean Harvey, Christopher V. Synatschke, Jacek Gapinski et al. "Fast Light-Driven Motion of Polydopamine Nanomembranes". Nano Letters 22, n.º 2 (14 de diciembre de 2021): 578–85. http://dx.doi.org/10.1021/acs.nanolett.1c03165.

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46

Li, Haonan, Long Jiao, Rong Chen, Xun Zhu, Yang Yang, Dingding Ye, Hong Wang, Yijing Yang y Qiang Liao. "Upper Limit of Light-Levitated Droplet Motion". Analytical Chemistry 93, n.º 48 (19 de noviembre de 2021): 16008–16. http://dx.doi.org/10.1021/acs.analchem.1c03512.

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47

Whiting, Alan B. "Light and Motion in the Local Volume". Astrophysical Journal 622, n.º 1 (20 de marzo de 2005): 217–34. http://dx.doi.org/10.1086/428085.

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48

Rylander, Jeffrey W. y John J. Miller. "Diffraction patterns with light and motion sensors". Physics Teacher 37, n.º 2 (febrero de 1999): 106–7. http://dx.doi.org/10.1119/1.880162.

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49

Dalibard, J. "Atomic Brownian Motion in a Light Wave". Physica Scripta T12 (1 de enero de 1986): 28–33. http://dx.doi.org/10.1088/0031-8949/1986/t12/004.

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50

Yeston, Jake. "Coupled motion in a light-activated rotor". Science 356, n.º 6341 (1 de junio de 2017): 918.3–918. http://dx.doi.org/10.1126/science.356.6341.918-c.

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