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  • Random number generation on handheld devices for cryptographic applications

    Creator:
    Montville, Adam W.
    Abstract:
    Random number generation is important in many fields today. It is particularly important in the field of cryptography when generating nonce values, cryptographic keys, and other data required in many cryptographic applications. The proliferation of small, handheld devices that are typically connected to large networks via a wireless connection requires...
    Resource Type:
    Masters Thesis
    Full Text:
    Number Generation on Handheld Devices for Cryptographic Applications Abstract Approved: Random number

  • Physical activity recognition of free-living data using change-point detection algorithms and hidden Markov models

    Creator:
    Anderson, Michael M.
    Abstract:
    Physical activity recognition using accelerometer data is a rapidly emerging field with many real-world applications. Much of the previous work in this area has assumed that the accelerometer data has already been segmented into pure activities, and the activity recognition task has been to classify these segments. In reality, activity...
    Resource Type:
    Masters Thesis
    Full Text:
    convert time series windows into feature vectors (taken from [42]). T is the number of ticks in the given

  • Performance and optimization of pulsed UWB localization with large number of sources

    Creator:
    Kwon, Changho
    Abstract:
    Pulsed ultra-wideband (UWB) radio uses extremely short pulses to transmit information. Such pulses provide very fine timing information, which has led to technological advances in high-precision localization. This thesis focuses on techniques and experiments of Time-Difference-of-Arrival (TDOA) localization of a large number of simultaneous sources. First, common localization techniques such...
    Resource Type:
    Masters Thesis
    Full Text:
    Localization with Large Number of Sources Abstract approved

  • Process segmentation and modelling applied to time series featuring the response of biological materials to toxic agents

    Creator:
    Teng, Angela
    Abstract:
    The detection of biological and chemical toxins has become one of the main concerns in environmental and military fields. In this framework, the department of Microbiology and Biochemistry at Oregon State University has discovered that fish living cells are promising indicators of the presence of a wide range of toxins....
    Resource Type:
    Masters Thesis
    Full Text:
    series Y, segmentation produces the best representation using an undefined number K of segments, such

  • Investigation of Infrared Absorption of Carbon Dioxide in Metal–Organic Framework Material

    Creator:
    Li, Shiwen
    Abstract:
    Due to the advantages of the high surface area and high porosity, Metal-Organic Framework (MOF) materials are widely used in gas storage. As a typical MOF material, Zeolitic Imidazolate Framework-8 (Zif-8) has high selectivity and adsorption capability of carbon dioxide (CO2). In this thesis, we investigated the infrared absorption of...
    Resource Type:
    Masters Thesis
    Full Text:
    Imidazolate Framework-8 (Zif-8) has high selectivity and adsorption capability of carbon dioxide (CO2). In

  • Predicting activity type from accelerometer data

    Creator:
    Zheng, Yonglei
    Abstract:
    The study of physical activity is important in improving people’s health as it can help people understand the relationship between physical activity and health. Accelerometers, due to its small size, low cost, convenience and its ability to provide objective information about the frequency, intensity, and duration of physical activity, has...
    Resource Type:
    Masters Thesis
    Full Text:
    generated by Member-Train. 2: T : time series for training. 3: c: the number of classes. Output 1: meta

  • Design techniques for high efficiency high current LED drivers

    Creator:
    Rao, Sachin B.
    Abstract:
    Solid-state based lighting offers a number of advantages such as long life, high efficiency and compactness compared to a conventional halogen tube based lighting. Due to these advantages they are being increasingly used in a variety of lighting applications including portable devices, home, and automotive lighting. Consequently, there has been...
    Resource Type:
    Masters Thesis
    Full Text:
    -state based lighting offers a number of advantages such as long life, high effi- ciency and compactness

  • A comparison of box-cox and additive exponential models to estimate the depreciation of farm machinery

    Creator:
    Wu, Jing
    Abstract:
    Farm machinery continues to increase in its importance to the agricultural sector. Depreciation, the decline in value of a durable asset over time, represents one of the largest costs of agricultural production. The general objectives of this study were to update and expand the number of Remaining Value (RV) functions...
    Resource Type:
    Masters Thesis
    Full Text:
    update and expand the number of Remaining Value (RV) functions for farm machinery; estimate and compare

  • Information space mapping with adaptive multiplicatively weighted Voronoi diagrams

    Creator:
    Trubin, Stanislav I.
    Abstract:
    Traditional application of Voronoi diagrams for space partitioning creates Voronoi regions, with areas determined by the generators’ relative locations and weights. Especially in the area of information space (re)construction, however, there is a need for inverse solutions; i.e., finding weights that result in regions with predefined areas. In this thesis,...
    Resource Type:
    Masters Thesis
    Full Text:
    successfully tested is successfully tested on a series of ideal/pathological cases, as well as using

  • A nano-power wake-up circuit for RF energy harvesting wireless sensor networks

    Creator:
    Lindsley, Christopher J.
    Abstract:
    A fully integrated CMOS latched comparator is presented for use as a wake-up circuit that is attached to an RF energy harvester in a battery free wireless sensor network. The system consumes less than 36nA static current at 20°C and dissipates 2pJ of energy per conversion. The comparator comprises of...
    Resource Type:
    Masters Thesis
    Full Text:
    conversion. The comparator comprises of a series of level-shifting leakage-mode inverters. Its latching