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DSpace at MIT (98.720 recursos)

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Electrical Engineering and Computer Sciences - Master's degree

Mostrando recursos 1 - 20 de 6.209

  1. Passive and active grasping with a prehensile robot end-effector

    Greiner, Helen
    by Helen Greiner.

  2. A model for distributed mobile robot environment learning and navigation

    Matarić, Maja J
    by Maja J. Mataric.

  3. Predicting rejection rates of electric distribution wood pole assets

    Kelchev, Boyan Lyubomirov
    Pacific Gas & Electric Companys (PG&E) electric distribution system includes approximately 2.4 million wood utility poles. The Pole Test & Treat (PTT) program at PG&E is responsible for inspecting these poles, prolonging their service life through the use of chemical treatments or structural reinforcements, and identifying poles that need to be replaced. Following industry best practices and taking advantage of the vast knowledge and experience of the PTT team, PG&E inspects poles every 10 years. The company believes that the next step in improving the performance of the PTT program is to leverage the data collected since the inception of...

  4. NeverMind : an interface for human Memory augmentation

    Rosello, Oscar (Rosello Gil)
    If we are to understand human-level intelligence, we need to understand how memories are encoded, stored and retrieved. In this thesis, I take a step towards that understanding by focusing on a high-level interpretation of the relationship between episodic memory formation and spatial navigation. On the basis of the biologically inspired process, I focus on the implementation of NeverMind, an augmented reality (AR) interface designed to help people memorize effectively. Early experiments conducted with a prototype of NeverMind suggest that the long-term memory recall accuracy of sequences of items is nearly tripled compared to paper-based memorization tasks. For this thesis,...

  5. Analytics for hotels : demand prediction and decision optimization

    Sun, Ri, S.M. Massachusetts Institute of Technology
    The thesis presents the work with a hotel company, as an example of how machine learning techniques can be applied to improve demand predictions and help a hotel property to make better decisions on its pricing and capacity allocation strategies. To solve the decision optimization problem, we first build a random forest model to predict demand under given prices, and then plug the predictions into a mixed integer program to optimize the prices and capacity allocation decisions. We present in the numerical results that our demand forecast model can provide accurate demand predictions, and with optimized decisions, the hotel is...

  6. Modelling the prospects and impacts of methanol use in transportation in China at computable general equilibrium

    Nami, Mahsa
    The use of methanol as a transportation fuel is not a new phenomenon. However, factors such as price fluctuations, resistance to widespread introduction by special interest groups, and governmental policies have stood in the way of the widespread use of methanol in covering transportation demand. In this thesis, a computable general equilibrium energy-economy model of the world, the Economic Projection and Policy Analysis (EPPA) model, is used to evaluate the potential for methanol vehicle penetration in the private passenger vehicle market in China depending on the cost competitiveness of the technology combination compared to electric and conventional vehicles, the relative...

  7. Using "teacher moments" as an online practice space for parent-teacher conference simulation in preservice teacher education

    Owho-Ovuakporie, Kesiena
    The aim of this thesis is to investigate and improve the suitability of Teacher Moments as an online practice space for parent-teacher conference simulation in preservice teacher education. We evaluate Teacher Moments by means of a playtest conducted with students of a preservice education class for undergraduates in the Scheller Teacher Education Program (STEP) at MIT. We set out to answer 3 research questions. 1) How do users perceive the authenticity of parent-teacher conference simulations in Teacher Moments? 2) How do students' reflections relate to the learning objectives after completing a parent-teacher conference simulation in Teacher Moments? 3) How do...

  8. Periodic subwavelength photonic structures

    Ye, Erika
    Three applications of the interaction of light with periodic dielectric structures are investigated. The first application is large-area spectroscopy, for which we use the mid-field diffraction pattern generated by the light source passing through a transmission grating to determine its spectral composition. By utilizing a large grating size, we are able to achieve resolutions of < 4 nm experimental while having an etendue of roughly 0.033 mm2. Furthermore, since we are sampling the mid-field light pattern as opposed to the farfield, the entire spectrometer can fit within a 10 mm by 10 mm by 5 mm volume. The second application...

  9. Better multivalent battery materials through diffusion high-throughput computations

    Rong, Ziqin
    Accelerating the discovery of advanced materials is essential for human beings. However, the traditional trial-and-error way of developing materials is often very empirical and time- consuming. In 2011, the launch of Materials Genome Initiative marked a large-scale collaboration between computer scientists and materials scientists to deploy proven computational methods to predict, screen, and optimize materials at an unparalleled scale and rate. This thesis is based on this idea. Finding a suitable cathode material for Mg batteries has been one of the key challenges to the next-generation multi-valent battery technology. In this thesis, a high-throughput computation system is proposed to solve...

  10. A study of radio interference from the electric ignition of internal combustion motors

    Hall, Albert C. (Albert Carruthers), 1914-
    by Albert Carruthers Hall.

  11. A study of radio interference from the electric ignition of internal combustion motors

    Hall, Albert C. (Albert Carruthers), 1914-
    by Albert Carruthers Hall.

  12. Computer analysis and evaluation of stock trading tactics

    Baber, Robert Laurence
    by Robert Laurence Baber.

  13. Computer analysis and evaluation of stock trading tactics

    Baber, Robert Laurence
    by Robert Laurence Baber.

  14. An automatic curve follower for the Rockefeller Differential Analyzer

    Grossimon, Herbert Peter
    by Herbert Peter Grossimon.

  15. An automatic curve follower for the Rockefeller Differential Analyzer

    Grossimon, Herbert Peter
    by Herbert Peter Grossimon.

  16. A linearity compensator for the Pam-Fm telemetering system

    Gautraud, John A
    by John Albert Gautraud.

  17. A linearity compensator for the Pam-Fm telemetering system

    Gautraud, John A
    by John Albert Gautraud.

  18. Integrated LIDAR with optical phased arrays in silicon photonics

    Poulton, Christopher Vincent
    Light detection and ranging (LIDAR) has become an ubiquitous ranging technology. LIDAR systems are integral to almost all autonomous vehicles and robotics. Most LIDAR systems today use discrete free-space optical components and utilize a mechanical apparatus for beam steering. Apart from the relative high cost of the system, this mechanical apparatus limits the scan rate of the LIDAR system while increasing both size and complexity. This leads to concerns about long-term reliability, especially in harsh environments. In this thesis, the design and experimental results of an integrated chip-scale frequency-modulated continuous-wave LIDAR system are presented. This system has the capability of...

  19. Improvisational specification of design spaces

    Charidis, Alexandros
    As a mathematical abstraction and as a model for automated problem solving, the classical notion of a design space has proven convenient for the sciences and the engineering disciplines over the past sixty years. This is also true for models of calculating in design. These models, however, assume implicitly that a design space, one of possible compositions of shapes, is invented as a one-off final description or specification of designs, and that the individual who designs or composes has nothing new to contribute in the calculations other than to search and select among available possibilities. I suggest that this is...

  20. Nanophotonic visible light phased arrays

    Raval, Manan
    Previously demonstrated integrated optical phased arrays have primarily been implemented in silicon-based platforms and have therefore been limited to operation at infrared wavelengths, where silicon provides low-loss transmission. Developing integrated optical phased arrays for visible wavelengths would enable the exploration of new applications for this technology, such as autostereoscopic displays and neuronal targeting for optogenetics. The work presented in this thesis involves the development of visible light integrated optical phased array components and systems with a focus on autostereoscopic image projection applications. Practical 3D microdisplay applications will require (1) large-aperture phased array systems for diffraction minimization, (2) integrated phase modulation...

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