Visual Prostheses for the Blind
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Fibonacci Number
Fibonacci number From Wikipedia, the free encyclopedia • Have questions? Find out how to ask questions and get answers. • • Learn more about citing Wikipedia • Jump to: navigation, search A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above – see golden spiral In mathematics, the Fibonacci numbers form a sequence defined by the following recurrence relation: That is, after two starting values, each number is the sum of the two preceding numbers. The first Fibonacci numbers (sequence A000045 in OEIS), also denoted as Fn, for n = 0, 1, … , are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, ... (Sometimes this sequence is considered to start at F1 = 1, but in this article it is regarded as beginning with F0=0.) The Fibonacci numbers are named after Leonardo of Pisa, known as Fibonacci, although they had been described earlier in India. [1] [2] • [edit] Origins The Fibonacci numbers first appeared, under the name mātrāmeru (mountain of cadence), in the work of the Sanskrit grammarian Pingala (Chandah-shāstra, the Art of Prosody, 450 or 200 BC). Prosody was important in ancient Indian ritual because of an emphasis on the purity of utterance. The Indian mathematician Virahanka (6th century AD) showed how the Fibonacci sequence arose in the analysis of metres with long and short syllables. Subsequently, the Jain philosopher Hemachandra (c.1150) composed a well-known text on these. -
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State-of-the-Art Review Section Editors: Grant T. Liu, MD Randy H. Kardon, MD, PhD Update on Retinal Prosthetic Research: The Boston Retinal Implant Project Joseph F. Rizzo III, MD Abstract: The field of retinal prosthetic research, now more pathway in the retina, optic nerve, lateral geniculate body, than 20 years old, has produced many high-quality technical and the primary or higher visual cortical regions. Each options that have the potential to restore vision to patients approach has advantages and disadvantages. There is no with acquired disease of the outer retina. Five companies have performed Phase I clinical trials demonstrating that clear benefit to one approach or the other. blind patients can reliably report basic elements of visual The first attempt to build a visual prosthesis dates back to percepts induced by electrical stimulation. However, at the 1970s (1). In the late 1980s, 2 research groups, one present patients and observers generally do not consider based at the Massachusetts Eye and Ear Infirmary/Harvard the results to be useful enough in the performance of tasks Medical School and the Massachusetts Institute of Tech- of daily living to justify the risks of surgery and chronic implantation or the costs. Having developed a wireless nology and the other at the North Carolina State University device implanted in the subretinal space, the Boston Ret- and the Duke University, simultaneously began to in- inal Implant Project has focused its efforts on developing vestigate the development of a retinal prosthesis. The former scalable technologies to create a hermetic device that can consortium now includes the Boston Veterans Adminis- deliver individually controlled pulses of electrical stimula- tration Hospital as an integral partner. -
Retinal Prostheses: Progress Toward the Next Generation Implants
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Frontiers - Publisher Connector MINI REVIEW published: 20 August 2015 doi: 10.3389/fnins.2015.00290 Retinal prostheses: progress toward the next generation implants Diego Ghezzi* Medtronic Chair in Neuroengineering, Center for Neuroprosthetics, Interfaculty Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland In the last decade, various clinical trials proved the capability of visual prostheses, in particular retinal implants, to restore a useful form of vision. These encouraging results promoted the emerging of several strategies for neuronal stimulation aiming at the restoration of sight. Besides the traditional approach based on electrical stimulation through metal electrodes in the different areas of the visual path (e.g., the visual cortex, the lateral geniculate nucleus, the optic nerve, and the retina), novel concepts for neuronal stimulation have been mostly exploited as building blocks of the next generation of retinal implants. This review is focused on critically discussing recent major advancements in Edited by: the field of retinal stimulation with particular attention to the findings in the application Michele Giugliano, of novel concepts and materials. Last, the major challenges in the field and their clinical University of Antwerp, Belgium implications will be outlined. Reviewed by: Guillermo Peris Fajarnes, Keywords: vision, retinal prosthesis, photovoltaic stimulation, thermal stimulation, ultrasonic stimulation University of Valencia, Spain Karl Farrow, Neuro-Electronics Research Flanders, Introduction Belgium *Correspondence: Low vision and blindness can result when any step of the visual pathway (the cornea, the lens, Diego Ghezzi, the retina, the optic nerve, the thalamus, and the visual cortex) is altered or sustains damage. -
Cochlear Implant for the Deaf
Introduction to Neural Prosthesis Sung June Kim Neural Prosthetic Engineering 1 Neural Prosthesis • A device that connects directly with the nervous system to replace or supplement sensory or motor function. • A device that improves the quality of life of a neurologically impaired individual so much that he/she is willing to put up with the surgery, gadgetry, etc. Neural Prosthetic Engineering 2 Successful Areas of Neural Prosthesis • (Bionic Ear) • Hearing: Cochlear Implant • Vision: Retinal Implant • Parkinson’s Disease: DBS (Deep Brain Stimulation) Neural Prosthetic Engineering 3 Why these three? • Success in Cochlear Implant • The other two were inspired by its (the CI’s) success. • The Cochlear and Retinal implants are sensory prosthetics, using electrical stimulation of neurons. • The DBS deals with motion disability yet uses CI like neuronal stimulation. Neural Prosthetic Engineering 4 Why was CI so successful? • Spatially isolated space was available for the electrode array. The electrode array was still electrically connected to the target neurons. • Timely development of the transistor based microelectronics technologies that made the electronics small (wearable, implantable) but powerful. http://www.cochlearamericas.com/ Neural Prosthetic Engineering 5 What are needed in NP? (1) • External unit is needed if there is a signal to process. • Speech is the signal to process in Cochlear Implant • Image is the signal to process in Retinal Implant • There is no external signal to process in DBS. External Unit Neural Prosthetic Engineering 6 Speech Processor, An example of External Unit 7 www. bionicear.com, www.medel.com, www.cochlear.com Neural Prosthetic Engineering What are needed in NP? (2) • Internal Unit (Implantable Unit) • This unit generates electrical signals, and apply them to the array of electrodes that stimulate target neurons. -
THE 11TH WORLD CONGRESS on the Relationship Between Neurobiology and Nano-Electronics Focusing on Artificial Vision
THE 11TH WORLD CONGRESS On the Relationship Between Neurobiology and Nano-Electronics Focusing on Artificial Vision November 10-12, 2019 The Henry, An Autograph Collection Hotel DEPARTMENT OF OPHTHALMOLOGY Detroit Institute of Ophthalmology Thank you to Friends of Vision for your support of the Bartimaeus Dinner The Eye and The Chip 2 DEPARTMENT OF OPHTHALMOLOGY Detroit Institute of Ophthalmology TABLE OF CONTENTS WELCOME LETTER—PAUL A. EDWARDS. M.D. ....................................................... WELCOME LETTER—PHILIP C. HESSBURG, M.D. ..................................................... DETROIT INSTITUTE OF OPHTHALMOLOGY ......................................................... ORGANIZING COMMITTEE/ACCREDITATION STATEMENT ............................................... CONGRESS 3-DAY SCHEDULE ................................................................... PLATFORM SPEAKER LIST ...................................................................... SPEAKER ABSTRACTS .......................................................................... POSTER PRESENTERS’ LIST ..................................................................... POSTER ABSTRACTS ........................................................................... BARTIMAEUS AWARD—PREVIOUS RECIPIENTS ...................................................... SUPPORTING SPONSORS . Audio-Visual Services Provided by Dynasty Media Network http://dynastymedianetwork.com/ The Eye and The Chip Welcome On behalf of the Henry Ford Health System and the Department of Ophthalmology, -
In This Research Report We Will Explore the Gestalt Principles and Their Implications and How Human’S Perception Can Be Tricked
The Gestalt Principles and there role in the effectiveness of Optical Illusions. By Brendan Mc Kinney Abstract Illusion are created in human perception in relation to how the mind process information, in this regard on to speculate that the Gestalt Principles are a key process in the success of optical illusions. To understand this principle the research paper will examine several optical illusions in the hopes that they exhibit similar traits used in the Gestalt Principles. In this research report we will explore the Gestalt Principles and their implications and how human’s perception can be tricked. The Gestalt Principles are the guiding principles of perception developed from testing on perception and how human beings perceive their surroundings. Human perception can however be tricked by understanding the Gestalt principles and using them to fool the human perception. The goal of this paper is to ask how illusions can be created to fool human’s perception using the gestalt principles as a basis for human’s perception. To examine the supposed, effect the Gestalt Principles in illusions we will look at three, the first being Rubin’s Vase, followed by the Penrose Stairs and the Kanizsa Triangle to understand the Gestalt Principles in play. In this context we will be looking at Optical Illusion rather than illusions using sound to understand the Gestalt Principles influence on human’s perception of reality. Illusions are described as a perception of something that is inconsistent with the actual reality (dictionary.com, 2015). How the human mind examines the world around them can be different from the actuality before them, this is due to the Gestalt principles influencing people’s perception. -
The Psychological Intersection of Motion Picture, the Still Frame, and Three-Dimensional Form
MOMENTUM, MOMENT, EPIPHANY: THE PSYCHOLOGICAL INTERSECTION OF MOTION PICTURE, THE STILL FRAME, AND THREE-DIMENSIONAL FORM by MARK GERSTEIN B.A. The University of Chicago, 1986 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Fine Arts in the School of Visual Arts and Design in the College of Arts and Humanities at the University of Central Florida Orlando, Florida Spring Term 2018 ABSTRACT My journey from Hollywood Film production to a Fine Arts practice has been shaped by theory from Philosophy of Mind, Cognitive Psychology, Film, and Art, leading me to a new visual vocabulary at the intersection of motion picture, the still image, and three-dimensional form. I create large mixed media collages by projecting video onto photographs and sculptural forms, breaking the boundaries of the conventional film frame and exceeding the dynamic range of typical visual experience. My work explores emotional connections and fissures within family, and hidden meanings of haunting memories and familiar places. I am searching for an elusive type of perceptual experience characterized by an instantaneous shift in perspective—an “aha” moment of epiphany when suddenly I have the overpowering feeling that I am both seeing and aware that I am seeing. ii To Lori, Joshua and Maya, for your infinite patience and unconditional love. iii ACKNOWLEDGMENTS I want to take this opportunity to acknowledge all my Studio Art colleagues who have so graciously tolerated my presence in their sandbox over these last few years. In particular, I want to thank my Thesis Committee: Carla Poindexter, my chair, for her nuanced critique, encouragement and unwavering belief in the potential of my work, and ability to embrace the seemingly contradictory roles of mentor and colleague; Jo Anne Adams, for her attention to detail and narrative sensibility that comes from our shared background in the film industry; and Ryan Buyssens, for showing me the possibilities of technology and interactivity, and reminding me to never lose sight of the meaning in my art. -
Principles of Three-Dimensional Computer Design for Understanding Impossible Figures
International Journal of Engineering and Management Sciences (IJEMS) Vol. 5. (2020). No. 2 DOI: 10.21791/IJEMS.2020.2.21. Principles of Three-Dimensional Computer Design for Understanding Impossible Figures T. DOVRAMADJIEV ITechnical University of Varna, Bulgaria, MTF, Dept. Industrial Design, [email protected] Abstract: For a better understanding of the impossible figures, it is advisable to use modern technological means by which the design of the geometry of the models gives a complete understanding of how they are made. Computer- aided 3D design completely solves this problem. That is, on the one hand, the ultimate visual variant of impossible figures is created, on the other hand, there is the possibility for real manipulation, movement, rotation and other models of space. In this study, 3D models of impossible figures are fully constructed, which are applied in the educational process in order to develop logical thinking. The steps of creating 3D geometry using open source software Blender 3D are described in details. Keywords: 3D, Blender, logic, impossible, figures Introduction Impossible figures are combinations of geometric elements positioned in specific compilations that create the illusion of completed objects, but at the same time have an extremely impossible vision. This is especially the case when certain details are interwoven in a particular order or position. Creating them requires a rich imagination and understanding of three-dimensional space. Impossible figures are a good tool for developing logical thinking, creating creativity in adolescents, and are often used in the educational process. Impossible figures are present in the visual arts, architecture and spatial form shaping. -
The Bionic Eye…A New Vision of the Future
International Journal of Science and Research (IJSR) ISSN: 2319-7064 ResearchGate Impact Factor (2018): 0.28 | SJIF (2019): 7.583 The Bionic Eye…A New Vision of the Future Abhinn D. Suthar1, Tejas R. Suthar2 1 MIT School of Bioengineering Science and Research, MIT ADT University, Pune, India 2MIT College of Food Technology, MIT ADT University, Pune, India (Correspondence Author) Abstract: Artificial vision is new emerging revolutionary technique that allows blind people to see. This can be possible by visual implants like either camera or photoreceptors array. A specialist can perform the best supernatural art of providing new vision to individual who has lost his/her visualizing power or eye sight. A visual prosthesis or bionic eye is a type of neural prosthesis expected to mostly re-establish lost vision or intensify existing vision brought about by a visual observation in patients with retinal pathologies like retinitis pigmentosa and age-related macular degeneration. In this article we have represented the different aspects related to technological advancement in implanting bionic eye. The essential capacity of the gadget to get the pictures utilizing a camera, convert it to electric signs and in the long run animate the left-over more advantageous pieces of the visual pathway. The embed visual prosthesis depends on a little chip that is precisely embedded behind the retina, at the rear of the eye ball. Virtual protheses like automated retinal systems are a new and innovative solution to extreme vision impairment care. We have also included the history of advancement in prosthetic and surgical process of embedding bionic eye. -
India Vision 2020' a Possibility
ISSN(Online) : 2319-8753 ISSN (Print) : 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Vol. 5, Issue 12, December 2016 VISION THROUGH ELECTRONICS- To make 'India Vision 2020' a Possibility V.Umaiyaal IV year Student, Dept of Biomedical Engineering, PSNA-CET, Kothandaraman Nagar, Dindigul, Tamil Nadu, India ABSTRACT: The dream of using electronic or artificial retinal replacements to treat blindness has long been held. In the development of prosthetic vision, it is also possible to stimulate the visual pathway at other sites other than the retina to gain visual perceptions The visual pathway functions as a complex image processor as well as an information conduit. At higher levels, the visual signals arrive with significant processing completed. Treatment options for the associated cataract and macular oedema, have been limited,retinal prostheses offer the only treatment option for patients at the severe end of the disease spectrum at present. There are currently two models of retinal prostheses available commercially: (i) Argus® II retinal prosthesis system (Second Sight Medical Product, Inc., Sylmar), which received CE (Conformité Européenne) marking in March 2011 and the Food and Drug Administration (FDA) approval in February 2013[3] and (ii) the alpha-IMS (Retinal Implant AG, Reutlingen), which obtained CE marking in July 2013.Apart from technological advances in prosthetic vision, development in other biomedical fields has also shed new hope on restoring vision in patients with end-stage retinal diseases, most notably the cellular therapy. This video camera is embedded in the inter-ocular bridge of the glasses frame. -
Sounds, Spectra, Audio Illusions, and Data Representations
Sounds, spectra, audio illusions, and data representations Edoardo Milotti, Dipartimento di Fisica, Università di Trieste Introduction to Signal Processing Techniques A. Y. 2016-17 Piano notes Pure 440 Hz sound BacK to the initial recording, left channel amplitude (volt, ampere, normalized amplitude units … ) time (sample number) amplitude (volt, ampere, normalized amplitude units … ) 0.004 0.002 0.000 -0.002 -0.004 0 1000 2000 3000 4000 5000 time (sample number) amplitude (volt, ampere, normalized amplitude units … ) 0.004 0.002 0.000 -0.002 -0.004 0 1000 2000 3000 4000 5000 time (sample number) squared amplitude frequency (frequency index) Short Time Fourier Transform (STFT) Fourier Transform A single blocK of data Segmented data Fourier Transform squared amplitude frequency (frequency index) squared amplitude frequency (frequency index) amplitude of most important Fourier component time Spectrogram time frequency • Original audio file • Reconstruction with the largest amplitude frequency component only • Reconstruction with 7 frequency components • Reconstruction with 7 frequency components + phase information amplitude (volt, ampere, normalized amplitude units … ) time (sample number) amplitude (volt, ampere, normalized amplitude units … ) time (sample number) squared amplitude frequency (frequency index) squared amplitude frequency (frequency index) squared amplitude Include only Fourier components with amplitudes ABOVE a given threshold 18 Fourier components frequency (frequency index) squared amplitude Include only Fourier components with amplitudes ABOVE a given threshold 39 Fourier components frequency (frequency index) squared amplitude frequency (frequency index) Glissando In music, a glissando [ɡlisˈsando] (plural: glissandi, abbreviated gliss.) is a glide from one pitch to another. It is an Italianized musical term derived from the French glisser, to glide. -
A Review of Retinal Prosthesis Approaches
International Conference Mathematical and Computational Biology 2011 International Journal of Modern Physics: Conference Series Vol. 9 (2012) 209–231 World Scientific Publishing Company DOI: 10.1142/S2010194512005272 A REVIEW OF RETINAL PROSTHESIS APPROACHES TRAN TRUNG KIEN School of Computer Science, The University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor 43500, Malaysia [email protected] TOMAS MAUL School of Computer Science, The University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor 43500, Malaysia [email protected] ANDRZEJ BARGIELA School of Computer Science, The University of Nottingham, Nottingham, NG8 1BB [email protected] Age-related macular degeneration and retinitis pigmentosa are two of the most common diseases that cause degeneration in the outer retina, which can lead to several visual impairments up to blindness. Vision restoration is an important goal for which several different research approaches are currently being pursued. We are concerned with restoration via retinal prosthetic devices. Prostheses can be implemented intraocularly and extraocularly, which leads to different categories of devices. Cortical Prostheses and Optic Nerve Prostheses are examples of extraocular solutions while Epiretinal Prostheses and Subretinal Prostheses are examples of intraocular solutions. Some of the prostheses that are successfully implanted and tested in animals as well as humans can restore basic visual functions but still have limitations. This paper will give an overview of the current state of art of Retinal Prostheses and compare the advantages and limitations of each type. The purpose of this review is thus to summarize the current technologies and approaches used in developing Retinal Prostheses and therefore to lay a foundation for future designs and research directions.