Solar array technology evaluation program for SEPS (Solar Electrical Propulsion Stage)

An evaluation of the technology and the development of a preliminary design for a 25 kilowatt solar array system for solar electric propulsion are discussed. The solar array has a power to weight ratio of 65 watts per kilogram. The solar array system is composed of two wings. Each wing consists of a solar array blanket, a blanket launch storage container, an extension/retraction mast assembly, a blanket tensioning system, an array electrical harness, and hardware for supporting the system for launch and in the operating position. The technology evaluation was performed to assess the applicable solar array state-of-the-art and to define supporting research necessary to achieve technology readiness for meeting the solar electric propulsion system solar array design requirements

Cumulative index to NASA Tech Briefs, 1963-1967

Cumulative index to NASA survey on technology utilization of aerospace research outpu

Laser cladding

Imperial Users onl

Space Construction Automated Fabrication Experiment Definition Study (SCAFEDS), part 3. Volume 2: Study results

The detailed results of all part 3 study tasks are presented. Selected analysis was performed on the beam builder conceptual design. The functions of the beam builder and a ground test beam builder were defined. Jig and fixture concepts were developed and the developmental plans of the beam builder were expounded

Pneumatic Tire

For many years, tire engineers relied on the monograph, \u27Mechanics of Pneumatic Tires\u27, for detailed information about the principles of tire design and use. Published originally by the National Bureau of Standards, U.S. Department of Commerce, in 1971, and a later (1981) edition by the National Highway Traffic Safety Administration (NHTSA), U.S. Department of Transportation, it has long been out of print. No textbook or monograph of comparable range and depth has appeared since. While many chapters of the two editions contain authoritative reviews that are still relevant today, they were prepared in an era when bias ply and belted-bias tires were in widespread use in the United States and thus did not deal in a comprehensive way with more recent tire technology, notably the radial constructions now adopted nearly universally. In 2002, it was preposed that NHTSA should sponsor and publish electronically a new book on passenger tires, under editorship of the University of Akron, to meet the needs of a new generation of tire scientists, engineers, designers, and users. This text is the outcome. The chapter authors are recognized authorities in tire science and technology. They have prepared scholarly and up-to-date reviews of the various aspects of passenger car tire design, construction and use, and included test questions in many instances, so that the book can be used for self-study or as a teaching text by engineers and others entering the tire industry

Experience dependent coding of intonations by offsets in mouse auditory cortex

Acoustic communication is an important aspect of many social interactions across mammalian species. The encoding of intra-species vocalizations and plasticity mechanisms engaged during the process of learning vocalizations are poorly understood. This is particularly true with regards to how sensory representations of vocalizations is transformed between primary to secondary auditory cortical areas. Moreover, learning in a natural communication paradigm engages auditory cortical plasticity mechanisms in ways that are distinct from laboratory operant training paradigms, emphasizing the importance of studying learning in social settings. Our work utilizes a natural paradigm in which mouse mothers learn the behavioral significance of pup ultrasonic vocalizations during maternal experience to study auditory cortical plasticity in a natural social context. Specifically, we aim to determine how mice learn to use acoustic features to discriminate vocalization categories. One of the acoustic features that can be used to distinguish whistle-like mouse vocalizations is their frequency trajectory or intonation, which can be modeled using a parameterized sinusoidally frequency modulated tone. We will employ a combination of in vivo head-fixed awake single unit electrophysiology and modeling of the natural mouse vocalization repertoire to explore the frequency trajectory parameter space. With this approach, we aim to study the native sensitivity of auditory cortical neurons to frequency trajectory parameters across primary and secondary auditory regions, as well as how sensitivity to these parameters changes with experience. This work will further our understanding of how the acoustic feature space is represented by the auditory cortex, and uncovers a potential mechanism by which natural sound categories are learned.Ph.D

Applications of Finite Element Modeling for Mechanical and Mechatronic Systems

Modern engineering practice requires advanced numerical modeling because, among other things, it reduces the costs associated with prototyping or predicting the occurrence of potentially dangerous situations during operation in certain defined conditions. Thus far, different methods have been used to implement the real structure into the numerical version. The most popular uses have been variations of the finite element method (FEM). The aim of this Special Issue has been to familiarize the reader with the latest applications of the FEM for the modeling and analysis of diverse mechanical problems. Authors are encouraged to provide a concise description of the specific application or a potential application of the Special Issue

Technology 2001: The Second National Technology Transfer Conference and Exposition, volume 2

Proceedings of the workshop are presented. The mission of the conference was to transfer advanced technologies developed by the Federal government, its contractors, and other high-tech organizations to U.S. industries for their use in developing new or improved products and processes. Volume two presents papers on the following topics: materials science, robotics, test and measurement, advanced manufacturing, artificial intelligence, biotechnology, electronics, and software engineering

Покращення ресурсних характеристик літака шляхом оптимізації заклепкових з’єднань

Робота публікується згідно наказу Ректора НАУ від 27.05.2021 р. №311/од "Про розміщення кваліфікаційних робіт здобувачів вищої освіти в репозиторії університету". Керівник роботи: професор, д.т.н. Карускевич Михайло ВіталійовичThis master thesis is dedicated to optimization of aviation riveted joints by the reduction of secondary bending of aircraft skin components under the action of operational loads/ The methods of computer aided design CAD/CAE have been used, particularly CATIA та ABAQUS. The practical value of the diploma work lays in the improvement of the reliability and extension of the lifespan of aviation constructions by the optimization of the riveted joints geometry. The materials of the master's diploma can be used in the aviation industry and in the educational process of aviation specialties.Дана дипломна робота присвячена оптимізації заклепкових авіаційних з’єднань шляхом зменшення вторинного вигину елементів обшивки літака при дії експлуатаційних навантажень. В роботі було використано методи компьютерного проєктування за допомогою CAD/CAE систем проєктування та розрахунку, зокрема CATIA та ABAQUS. Практичне значення результату дипломної роботи магістра полягає в підвищенні надійності та довговічності авіаційних конструкцій, за рахунок оптимізації геометрії заклепкових з’єднань. Матеріали дипломної роботи магістра можуть бути використані в навчальному процесі та в практичній діяльності конструкторів спеціалізованих проєктних установ

Haptics: Science, Technology, Applications

This open access book constitutes the proceedings of the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2020, held in Leiden, The Netherlands, in September 2020. The 60 papers presented in this volume were carefully reviewed and selected from 111 submissions. The were organized in topical sections on haptic science, haptic technology, and haptic applications. This year's focus is on accessibility