Numerous complex real-world applications are either theoretically intractable or unable to be solved in a practical amount of time. Researchers and practitioners are forced to implement heuristics in solving such problems that can lead to highly sub-optimal solutions. Our research focuses on inserting a human in-the-loop of the decision-making or problem solving process in order to generate solutions in a timely manner that improve upon those that are generated either solely by a human or...
Topics: DTIC Archive, Malasky, Jeremy S, ALFRED P SLOAN SCHOOL OF MANAGEMENT CAMBRIDGE MA, *DECISION...
Recent progress in the production of high-intensity supersonic free jets of hydrocarbon radicals (e.g. CH2Hn, C3Hn), has made it possible to investigate the growth mechanism of diamond and diamond-like carbon by bombardment of a substrate with a well-characterized supersonic flow of defined radicals. This report details the first phase of the project, encompassing source design, and the engineering of specific radical precursors. We have constructed and tested new higher-temperature ceramic...
Topics: DTIC Archive, Chen, Peter, HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY, *SOURCES, PRECURSORS,...
With recent advances in research and technology, autonomous surface vessel capabilities have steadily increased. These autonomous surface vessel technologies enable missions and tasks to be performed without the direction of human operators, and have changed the way scientists and engineers approach problems. Because these robotic devices can work without manned guidance, they can execute missions that are too difficult, dangerous, expensive, or tedious for human operators to attempt. The...
Topics: DTIC Archive, Miller, John V, ALFRED P SLOAN SCHOOL OF MANAGEMENT CAMBRIDGE MA, *ROBOTICS,...
Multiple analyses of syntactically ambiguous sentences have been effectively and economically realized by a new extension of the method of predictive syntactic analysis. Branchings caused by homography (membership of a given word form in more than one syntactic word class) and by multiple functions of a given word class are followed in a systematic loop-free sequence in which each partial path is traversed only once. Different paths that reach the last word in a sentence correspond to different...
Topics: DTIC Archive, Oettinger, Anthony G, HARVARD UNIV CAMBRIDGE MA COMPUTATION LAB, *LANGUAGE, *MACHINE...
The construction of a mathematical model of the Instrument Landing System (ILS) multipath problem was undertaken. This report presents the theoretical basis for such a model, and newly achieved developments in ILS model construction.
Topics: DTIC Archive, Chin, G, TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA, *LANDING AIDS, *RADIO SIGNALS,...
As part of a research program aimed at determining the parameters influencing the effectiveness of a message retrieval system, a collection of 10, 000 technical abstracts was indexed and retrieval experiments were conducted with them. Since part of the work involved the development and test operation of an associative retrieval system, basic data about the distribution of words and word strings were gathered in preparing the system for test and trial. These statistics were thought to be of...
Topics: DTIC Archive, Jones, Paul E, LITTLE (ARTHUR D) INC CAMBRIDGE MA, *DATA PROCESSING, *SUBJECT...
Alternative techniques for predicting the aeroacoustic loads that act on flight vehicle surfaces due to propulsion and powered lift systems, surface flow, and armament are reviewed, evaluated, and compared.
Topics: DTIC Archive, Ungar, Eric E., BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *AERODYNAMIC LOADING,...
In support of the Federal Aviation Administration Technical Center's (FMTC) National Aging Aircraft Research Program (NAARP), Sandia National Laboratories and the John A. Volpe National Transportation Systems Center (Volpe Center) are conducting research to determine if current rules for design, inspection, and maintenance are sufficient to ensure the safe operation of the aging fleet. Particular emphasis has been given to a phenomenon of multiple cracking that appears to be an attribute of...
Topics: DTIC Archive, Jeong, David Y., JOHN A VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA,...
Topics: DTIC Archive, Dearborn, DeWitt C., Kneznek, Rose W., Anthony, Robert N., HARVARD UNIV CAMBRIDGE MA...
The purpose of this program is to produce an adherent, low friction and wear resistant coating on a beryllium surface by in-situ formation of boride or borides of beryllium, with this goal being pursued via two distinct avenues of approach, i.e., diffusion, and ion implantation. This report covers a period of roughly one year since October 1978. In the portion of the work which features diffusion from a solid boron source, it is now determined that the cause of earlier failures in producing...
Topics: DTIC Archive, Das,D, CHARLES STARK DRAPER LAB INC CAMBRIDGE MA, *SURFACE CHEMISTRY, *GAS BEARINGS,...
Conventional computer architecture has shown its limitations in supporting large-scale information processing. Database machines which specialize in database functions have been suggested to alleviate the problem of increasing loads on these computers. The INFOPLEX database machine proposed by Madnick employs a highly-parallel computer architecture to achieve high performance and capacity. It contains two subsystems: the storage hierarchy and the functional hierarchy. This paper is about a...
Topics: DTIC Archive, Hsu,Meichun, ALFRED P SLOAN SCHOOL OF MANAGEMENT CAMBRIDGE MA CENTER FOR INFORMATION...
Four complete falling-sphere densitometer systems were designed and launched, with generally satisfactory results, at three locations: New Mexico, Sweden, and Alaska. The task included the provision and launch responsibility for the nose cones and ejection systems for all densitometers and the provision and launch responsibility for two unique support units for the payloads flown in Sweden. Refinements were made to improve system accuracy in the calibration and data reduction techniques for the...
Topics: DTIC Archive, Fryklund,Donald H, ACCUMETRICS CORP CAMBRIDGE MA, *DENSITOMETERS, PAYLOAD,...
The Mixed Initiative courses of action (COA) Critic Advisor (MICCA) research effort developed an agent-based proof of concept prototype for evaluation and alignment of externally generated or historical plans and/or COAs with the current world state. MICCA was used to support the evaluation and adaptation of plans from two domains, the Rovers domain from the Third International Planning Competition and the DARPA Joint Air/Ground Operations Unified Adaptive Replanning (JAGUAR) Air Tasking Order...
Topics: DTIC Archive, RAYTHEON BBN TECHNOLOGIES CAMBRIDGE MA, *MILITARY PLANNING, *SOFTWARE TOOLS, DECISION...
A Simulation Network (SIMNET) project Software Design Document that describes the Plan View Display (PVD) Computer Software Configuration Item (CSCI number 3) of the SIMNET hardware and software training system for vehicle crew training and operational training.
Topics: DTIC Archive, BBN SYSTEMS AND TECHNOLOGIES CORP CAMBRIDGE MA, *COMPUTER PROGRAMS, TRAINING,...
A basic research program is described to investigate weather effects on microwave sensors used to remote sounding and to enhance our knowledge of microwave propagation through clouds and precipitation. In this report, we describe the current RADTRAN algorithm, enumerate its deficiencies, and provide corrective solutions. The latter include; (a) updating the code structure providing user friendly menus and internal comments, (b) providing for consistency with standardized input model atmospheres...
Topics: DTIC Archive, Isaacs, R G, ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC CAMBRIDGE MA, *WAVE...
These are appendices to Volume I (AD-644 519) which presents the substantive contents and test results of the game of POLITICA, a human player simulation of the role of the military and other factions in socio-political conflict in a primarily pre-violent, incipient insurgency situation in an idealized Latin American setting. The game was designed and test played by Abt Associates, Inc. staff members during the last three months of 1965 and early 1966.
Topics: DTIC Archive, Gordon, Martin, ABT ASSOCIATES INC CAMBRIDGE MA, *WAR GAMES, *COUNTERINSURGENCY,...
In this study, an attempt has been made to integrate the existing theoretical and experimental information regarding behavior of oil spills in the ocean into a unified, sequential calculation procedure. Major consideration has been given in the study to developing the least sophisticated calculation procedures which maintain a reasonable description of the totality of the physical processes. The principal phenomena included in the prediction of oil spill behavior are: combined spreading and...
Topics: DTIC Archive, Aravamudan, K., LITTLE (ARTHUR D) INC CAMBRIDGE MA, *PREDICTIONS, *DISPERSING,...
An infinite set of algebric equations was solved numerically for small cone angles. Comparisons were made between the modified conical antenna and its limiting biconical antenna which provides both an extrapolatory numerical check for the modified conical antenna with shrinking central sphere and an understanding of the underlying physical phenomena. Theoretical and experimental results are in very good agreement.
Topics: DTIC Archive, Kao, Peter S, HARVARD UNIV CAMBRIDGE MA CRUFT LAB, *CONICAL ANTENNAS, *DIPOLE...
The intramolecular vibrational energy distribution of infrared multiphoton-excited molecules is studied with time-resolved spontaneous Raman spectroscopy. For several molecules highly nonthermal energy distributions are observed, indicating high selectivity below the dissociation threshold. Keywords: Lasers, Infrared, Multiphoton, Excitation, Dissociation, Selectivity, Raman spectroscopy.
Topics: DTIC Archive, Mazur, Eric, HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES, *LASERS, *MOLECULES,...
The purpose of this study was to identify the factors that contribute to pilot-controller communication errors. Reports submitted to the Aviation Safety Reporting System (ASRS) offer detailed accounts of specific types of errors and a great deal of insight as to why they occur. The communication errors found in this study could be classified into three types: Readback/hearback errors (the pilot reads back the clearance incorrectly and the controller fails to correct the error), the absence of a...
Topics: DTIC Archive, Cardosi, Kim, JOHN A VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA,...
Nine Army installations were surveyed with respect to current methods of managing activated carbon spent during the treatment of explosive-containing wastewater. The initial purpose of this survey, designed to follow-up on a previous survey conducted in 1986, was to identify the potential market of explosive-laden carbon for commercial regeneration. Additional objectives of the survey were to document spent carbon management efforts and regeneration experiences of the individual installations...
Topics: DTIC Archive, Mahannah, J L, LITTLE (ARTHUR D) INC CAMBRIDGE MA, *EXPLOSIVES, *ACTIVATED CARBON,...
This paper describes the techniques used to optimize relational queries in the SDD-1, distributed database system. Queries are submitted to SDD- 1 in a high-level procedural language called Datalanguage. Optimization begins by translating each Datalanguage query into a relational calculus form called an envelope, which is essentially an aggregate-free QUEL query. This paper is primarily concerned with the optimization of envelopes. Envelopes are processed in two phases. The first phase executes...
Topics: DTIC Archive, Goodman, Nathan, COMPUTER CORP OF AMERICA CAMBRIDGE MA, *DATA BASES, *DISTRIBUTED...
This Quarterly Technical Report describes work on the development of and experimentation with packet broadcast by satellite; on development of Pluribus Satellite IMPs; on a study of the technology of Remote Site Maintenance; on the development of Inter-network monitoring; on shipboard satellite communications; and on the development of Transmission control protocols for the HP3000, TAC, and VAX-UNIX. (Author)
Topics: DTIC Archive, Bressler,R D, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *COMPUTER COMMUNICATIONS,...
The overall goal of this project is to develop rational approaches for controlling the structure and interfaces of high-temperature superconductors (HTSs) and other complex solids at the nanometer scale. Our emphasis on nanometer scale is motivated by the recognition that control of structure in this size regime leads in general to materials with enhanced and/or novel electrical, mechanical, optical and magnetic properties. In this regard, our main objective has been to control the nanometer...
Topics: DTIC Archive, Lieber, Charles M., HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY, *COMPOSITE...
The research described in this report focused on expanding our knowledge of laser micromaching and the scope of femtosecond laser fabrication. The research addressed Army Research Office initiatives for the development of novel photonics devices and techniques that utilize nonlinear optical phenomena. The interaction of femtosecond laser pulses with polymers were studied and the conditions for device fabrication were optimized. Various ways for inducing nonlinear response in polymers devices...
Topics: DTIC Archive, HARVARD UNIV CAMBRIDGE MA, *POLYMERS, *OPTICAL PHENOMENA, DIELECTRICS, NANOPARTICLES,...
Systems based on infochemistry combine the storage and transmission of encoded information with four attractive features of chemistry: i) high energy density; ii) autonomous generation of power that can be used for both sensing and for transmission; iii) no requirement for batteries; iv) facile coupling with certain kinds of chemical sensing. Throughout the infochemistry project, the Walt laboratory, at Tufts University, was responsible for developing an instrument/detector to observe the...
Topics: DTIC Archive, HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY AND CHEMICAL BIOLOGY, *CHEMICALS,...
Force protection capabilities have emerged as necessary for operations such as Village Stability Operations and Forward Operating Base security. Current Force Protection Kits include a rich set of sensors that can be monitored from a core operator station. This paper describes ongoing research to extend the reach of Force Protection capabilities as part of an integrated, network-centric system to protect mobile troops on patrol, to include sensors beyond the organic Force Protection perimeter,...
Topics: DTIC Archive, RAYTHEON BBN TECHNOLOGIES CAMBRIDGE MA, *COMMUNICATIONS NETWORKS, *INFORMATION...
This guideline relates to special studies under the Army Industrial Preparedness Program where domestic industrial sectors or commodity sectors are evaluated for meeting Defense requirements. Modern sector study activities are described in a framework of study parameters with checklists to assess production capability and capacity in Defense industries. The guideline reflects on Army effort towards a standard study approach for designing and performing future sector studies. It was prepared...
Topics: DTIC Archive, Katz-Rhoads, L, TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA, *MANUFACTURING,...
The primary objective of this research is the development and demonstration of a global Failure Detection and Identification (FDI) Design Assistant (DA) prototype based on expert system technology. A global FDI algorithm performs its detection, isolation and estimation function by assessing the global effects of a hardware fault and surface damage on the closed-loop aircraft dynamics. Since changes in the flight control law affect the signature of a hardware fault and surface damage, the design...
Topics: DTIC Archive, Allen, S M, CHARLES RIVER ANALYTICS INC CAMBRIDGE MA, *EXPERT SYSTEMS, *FLIGHT...
This report presents an assessment of the state of the art of airport pavement analysis and design. The objective is to identify those areas in current airport pavement analysis methodology that need to be substantially improved from the perspective of airport pavement design and management needs. The report presents a rational argument for developing a unified pavement analysis and design procedure that can be used for pavements of any material type (including reinforced concrete and asphalt)...
Topics: DTIC Archive, Zaniewski, John P, JOHN A VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA,...
Early phases of this design procedure were performed for the small, unmanned, tethered, underwater vehicle. The linear equations of motion for small perturbations about an equilibrium condition were developed, and the values of the hydrodynamic coefficients were determined. After the transfer functions were developed to relate the vehicle motion in each of the six degrees of freedom to small deflections of the rudder or stern planes, computer programs were written to determine the poles and...
Topics: DTIC Archive, Gillard, James H, CHARLES STARK DRAPER LAB INC CAMBRIDGE MA, *VELOCITY, COMPUTERIZED...
The Inter Vehicle Information System (IVIS) provides different types of reports that you can create, save, send, receive, delete and relay. Ivis also supports Position Navigation System (POSNAV) which helps you navigate your tank more efficiently and effectively. IVIS is integrated into a larger system know as the Combat Vehicle Command and Control System (CVCC).
Topics: DTIC Archive, BBN SYSTEMS AND TECHNOLOGIES CORP CAMBRIDGE MA, *SOFTWARE ENGINEERING, COMPUTER...
The document draws conclusions as to the nature and extend of soil and groundwater contamination created by past spills, disposal practices, and operations and draws conclusions regarding the risks the contaminants pose to human health and the environment at CRREL. Two primary classes of contaminants, Chlorinated Hydrocarbons and Petroleum Hydrocarbons are present at the site. They are present at the source areas as vapors trapped in the pores of the fine grained soils. Locally, the...
Topics: DTIC Archive, LITTLE (ARTHUR D) INC CAMBRIDGE MA, *COLD REGIONS, *GROUND WATER, *SOIL POLLUTION,...
This report describes the results of the second year of a 3-year project for development of a regional analysis system based on the method of optimal interpolation. The TAP project primary objective is to develop robust analysis procedures to support the tactical user. These analysis procedures provide stable meteorological products for end users. The function of TAP is to combine background (i.e. a priori) information with observations of diverse type, quality, and density to produce analyses...
Topics: DTIC Archive, Nehrkorn, Thomas, ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC CAMBRIDGE MA,...
Contents: Overview of O&S System Structure Represented by the Model; Overview of O&S Cost Calculations Contained within the Model; Overview of O&S Model Calculations; Readiness Measures Generated by the Model; O&S Cost Elements Generated by the Model; O&S Cost Relationships Contained within the Model; and Inputs to the O&S Cost Model.
Topics: DTIC Archive, PUGH-ROBERTS ASSOCIATES INC CAMBRIDGE MA, *LOGISTICS SUPPORT, AVIONICS, GUIDED...
We report on research toward a very-low-rate vocoder. This quarter we continued investigation in three areas. The first area of research is multi- speaker synthesis: speech synthesis from the transmitted vocoder parameters with the voice quality of the vocoder user. This processing entails speaker-specific spectral transformation of the vocoder diphone database. The second area of research is to improve the accuracy of the phonetic recognition. Our work this quarter concentrated on training the...
Topics: DTIC Archive, Makhoul, John, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *SPEECH ARTICULATION,...
This is the final report of the Boston University, Harvard University and University of Maryland MURI on Design and Control of Smart Structures. The report contains a summary of results obtained from the inception of the program in May 1997 until its conclusion in August, 2003. Over this period the researchers involved produced new and useful results in the areas of micromechanical devices (fabricated and used at ARL), micro fluidics, work on the control of boundary layer flows, work on...
Topics: DTIC Archive, Brockett, Roger W, HARVARD UNIV CAMBRIDGE MA, *MICROSTRUCTURE, *MICROMECHANICS,...
Traditional approaches to the problem of extracting data from texts have emphasized hand-crafted linguistic knowledge In contrast, BBN's PLUM system (Probabilistic Language Understanding Model) was developed as part of an ARPA-funded research effort on integrating probabilistic language models with more traditional linguistic techniques. Our research and development goals are: * Achieving high performance in objective evaluations, such as the Tipster evaluations. * Reducing human effort in...
Topics: DTIC Archive, Weischedel, Ralph, BBN SYSTEMS AND TECHNOLOGIES CORP CAMBRIDGE MA, *MATHEMATICAL...
The multiprotein mTORC1 protein kinase complex is the central component of a pathway that promotes growth in response to insulin, energy levels, and amino acids and is deregulated in common cancers. In particular, the mTOR pathway is hyperactive in Tuberous Sclerosis Complex (TSC), a mental retardation and cancer-prone syndrome affecting 1 in 6,000 people in the United States. With the long-term goal of developing anti-cancer therapeutics based on the mTORC1 regulatory mechanism, we recently...
Topics: DTIC Archive, Sabatini, David, WHITEHEAD INST FOR BIOMEDICAL RESEARCH CAMBRIDGE MA, *MENTAL...
An annual report of the JSEP (Joint Services Electronics Program) in solid state electronics, quantum electronics, information electronics, control and optimization, and electromagnetic phenomena is presented. Results of the research to date are summarized and significant accomplishments are discussed.
Topics: DTIC Archive, Tinkham, Michael, HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES, *ELECTRONICS,...
This report describes the results of the first 15 months of a two- year effort aimed at evaluating the advanced physics global spectral model (APGSM) developed by the Phillips Laboratory, in comparison with the currently operational GSM at Global Weather Central (GWC). Preliminary results from the verification of forecasts from the GWC GSM and APGSM, using the GWC analyses as a reference, are presented. The compaction and analysis of RTNEPH cloud data in preparation for generating and verifying...
Topics: DTIC Archive, Nehrkorn, Thomas, ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC CAMBRIDGE MA, *WEATHER...
We performed experiments to test the hypothesis that partial counter-doping of sulfur-hyperdoped silicon would create a partially filled intermediate band, which could be used for sub-bandgap photodetection. We fabricated counter-doped Si:S:B of well-controlled crystal quality and dopant concentration-depth profile, and we made three independent measurements of photoconductivity: one with contacts, and two without contacts. These measurements were per-formed in collaboration with the Persans...
Topics: DTIC Archive, HARVARD UNIV CAMBRIDGE MA, *BAND GAPS, *IMPURITIES, *PHOTOCONDUCTIVITY,...
This paper concerns the problem of planning a sequence of movements of linked polyhedra through 3 dimensional Euclidean space, avoiding contact with a fixed set of polyhedra obstacles. We prove this generalized mover's problem is polynomial space hard. Our proof provides strong evidence that robot movement planning is computationally intractable, i.e., any algorithm requires time growing exponentially with the number of degrees of freedom. Keywords: Robotics; Mover's problem; Obstacle...
Topics: DTIC Archive, Reif,John H, HARVARD UNIV CAMBRIDGE MA AIKEN COMPUTATION LAB, *ALGORITHMS, *ROBOTICS,...
A fully substituted halogenated benzene, chloropentafluorobenzene, was evaluated in a battery of in vitro short-term bioassays to assess its potential biological activity. The assays conducted were Ames Salmonella/ mammalian microsomal mutagenicity assay, the CHO gene mutation assay, the CHO/ sister chromatid exchange and chromosome aberrations assay, a DNA repair assay utilizing primary rat hepatocytes and the BALB/c-3T3 cell transformation assay. The test compound, although a liquid,...
Topics: DTIC Archive, Tu, Alice S., LITTLE (ARTHUR D) INC CAMBRIDGE MA, *BENZENE, *TOXICITY, *HALOGENATED...
This volume contains the proceedings of the international conference of Aircraft Wake Vortices held at the Quality Hotel Capitol Hill, Washington, DC, on October 29-31, 1991. The contributed papers discuss technological advances in the knowledge of the phenomenon, its effect on aircraft and airport capacity, detection techniques, and vortex avoidance schemes.
Topics: DTIC Archive, Hallock, J N, JOHN A VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA,...
The DARPA XG program seeks to develop and demonstrate adaptive spectrum utilization techniques which can be used to access unused spectrum without interference to incumbent users. This report describes the progress which was made to develop an XG architecture which is capable of accommodating a wide range of adaptive protocols operating within the bounds of spectral policy. Additionally this development included the definition of a machine readable policy language and a policy conformance...
Topics: DTIC Archive, Ramanathan, Ram, BBN TECHNOLOGIES CAMBRIDGE MA, *POLICIES, *COGNITION, *ADAPTIVE...
The goal of the APOD project was to give software applications an increased resistance against malicious attack even when they run in an environment that is not completely secured. We call any such application defense enabled. Note that defense enabling is less ambitious than building a secure system: rather than protect the entire system, defense enabling concentrates on the survival and integrity of essential applications, possibly sacrificing other parts of the system to the attacker....
Topics: DTIC Archive, Webber, Franklin, BBN TECHNOLOGIES CAMBRIDGE MA, *COMPUTER PROGRAMS, *DATA PROCESSING...
The objectives are a.) to evaluate the incidence of post-traumatic stress disorder (PTSD) in breast cancer patients and witnesses (i.e., significant others), and b.) to validate interview-based diagnoses by measuring physiologic responses during script-driven imagery of patients' and witnesses' personal experiences with breast cancer. To date, of 58 breast cancer patients studied, 4 (7%) met DSM-IV criteria for current PTSD; 11 (19%) for past PTSD; and 43 (74%) patients for neither. In the...
Topics: DTIC Archive, Pitman, Roger K, HARVARD COLL CAMBRIDGE MA, *DIAGNOSIS(MEDICINE), *TRAUMA,...
BBN has been tasked with developing a comprehensive coverage assessment tool for ocean acoustic monitoring. This tool will facilitate studies into the issues and sensitivities of using acoustic assets in the ocean to support a Comprehensive Test Ban Treaty. These issues include (1) understanding the sensitivity of signal structure to ocean environment variability as manifested through modal coupling, bottom and surface interaction losses and horizontal refraction and diffraction, (2)...
Topics: DTIC Archive, Duchworth, Greg, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *ACOUSTIC DETECTION,...
Quantum dots are small conducting islands that can often be usefully modeled as tiny capacitors. Though classical charging models can explain the Coulomb blockade of an isolated dot, they must be modified to explain the Coulomb blockade of dots coupled through the quantum mechanical tunneling of electrons. This thesis presents quantum mechanical models for pairs of tunnel-coupled dots and uses these models to follow the coupled dot blockade as it evolves from that characteristic of two isolated...
Topics: DTIC Archive, Golden, John M., HARVARD UNIV CAMBRIDGE MA DEPT OF PHYSICS, *QUANTUM ELECTRONICS,...
