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    The Influence of Breastfeeding Campaigns on Working Mothers in Nairobi: A Case Study of Selected Primary Schoolteachers in Embakasi Constituency by Mambo, Maureen Mbaluto

    Published 2019
    “…This recommends that breastfeeding campaigns should be more active especially the ones in the antenatal clinics, the campaigns should be integrate social media as an influential tool and also use other media such as radio since the majority of the Kenyans are in the local regions where radio is the main media of communication. …”
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    Thesis
  4. 24284

    Principles of GNSS, inertial, and multisensor integrated navigation systems / by Groves, Paul D. (Paul David)

    Published 2013
    Table of Contents: “…Machine generated contents note: ch. 1 Introduction -- 1.1.Fundamental Concepts -- 1.2.Dead Reckoning -- 1.3.Position Fixing -- 1.3.1.Position-Fixing Methods -- 1.3.2.Signal-Based Positioning -- 1.3.3.Environmental Feature Matching -- 1.4.The Navigation System -- 1.4.1.Requirements -- 1.4.2.Context -- 1.4.3.Integration -- 1.4.4.Aiding -- 1.4.5.Assistance and Cooperation -- 1.4.6.Fault Detection -- 1.5.Overview of the Book -- References -- ch. 2 Coordinate Frames, Kinematics, and the Earth -- 2.1.Coordinate Frames -- 2.1.1.Earth-Centered Inertial Frame -- 2.1.2.Earth-Centered Earth-Fixed Frame -- 2.1.3.Local Navigation Frame -- 2.1.4.Local Tangent-Plane Frame -- 2.1.5.Body Frame -- 2.1.6.Other Frames -- 2.2.Attitude, Rotation, and Resolving Axes Transformations -- 2.2.1.Euler Attitude -- 2.2.2.Coordinate Transformation Matrix -- 2.2.3.Quaternion Attitude -- 2.2.4.Rotation Vector -- 2.3.Kinematics -- 2.3.1.Angular Rate -- 2.3.2.Cartesian Position -- 2.3.3.Velocity -- 2.3.4.Acceleration -- 2.3.5.Motion with Respect to a Rotating Reference Frame -- 2.4.Earth Surface and Gravity Models -- 2.4.1.The Ellipsoid Model of the Earth's Surface -- 2.4.2.Curvilinear Position -- 2.4.3.Position Conversion -- 2.4.4.The Geoid, Orthometric Height, and Earth Tides -- 2.4.5.Projected Coordinates -- 2.4.6.Earth Rotation -- 2.4.7.Specific Force, Gravitation, and Gravity -- 2.5.Frame Transformations -- 2.5.1.Inertial and Earth Frames -- 2.5.2.Earth and Local Navigation Frames -- 2.5.3.Inertial and Local Navigation Frames -- 2.5.4.Earth and Local Tangent-Plane Frames -- 2.5.5.Transposition of Navigation Solutions -- References -- ch. 3 Kalman Filter-Based Estimation -- 3.1.Introduction -- 3.1.1.Elements of the Kalman Filter -- 3.1.2.Steps of the Kalman Filter -- 3.1.3.Kalman Filter Applications -- 3.2.Algorithms and Models -- 3.2.1.Definitions -- 3.2.2.Kalman Filter Algorithm -- 3.2.3.System Model -- 3.2.4.Measurement Model -- 3.2.5.Kalman Filter Behavior and State Observability -- 3.2.6.Closed-Loop Kalman Filter -- 3.2.7.Sequential Measurement Update -- 3.3.Implementation Issues -- 3.3.1.Tuning and Stability -- 3.3.2.Algorithm Design -- 3.3.3.Numerical Issues -- 3.3.4.Time Synchronization -- 3.3.5.Kalman Filter Design Process -- 3.4.Extensions to the Kalman Filter -- 3.4.1.Extended and Linearized Kalman Filter -- 3.4.2.Unscented Kalman Filter -- 3.4.3.Time-Correlated Noise -- 3.4.4.Adaptive Kalman Filter -- 3.4.5.Multiple-Hypothesis Filtering -- 3.4.6.Kalman Smoothing -- 3.5.The Particle Filter -- References -- ch. 4 Inertial Sensors -- 4.1.Accelerometers -- 4.1.1.Pendulous Accelerometers -- 4.1.2.Vibrating-Beam Accelerometers -- 4.2.Gyroscopes -- 4.2.1.Optical Gyroscopes -- 4.2.2.Vibratory Gyroscopes -- 4.3.Inertial Measurement Units -- 4.4.Error Characteristics -- 4.4.1.Biases -- 4.4.2.Scale Factor and Cross-Coupling Errors -- 4.4.3.Random Noise -- 4.4.4.Further Error Sources -- 4.4.5.Vibration-Induced Errors -- 4.4.6.Error Models -- References -- ch. 5 Inertial Navigation -- 5.1.Introduction to Inertial Navigation -- 5.2.Inertial-Frame Navigation Equations -- 5.2.1.Attitude Update -- 5.2.2.Specific-Force Frame Transformation -- 5.2.3.Velocity Update -- 5.2.4.Position Update -- 5.3.Earth-Frame Navigation Equations -- 5.3.1.Attitude Update -- 5.3.2.Specific-Force Frame Transformation -- 5.3.3.Velocity Update -- 5.3.4.Position Update -- 5.4.Local-Navigation-Frame Navigation Equations -- 5.4.1.Attitude Update -- 5.4.2.Specific-Force Frame Transformation -- 5.4.3.Velocity Update -- 5.4.4.Position Update -- 5.4.5.Wander-Azimuth Implementation -- 5.5.Navigation Equations Optimization -- 5.5.1.Precision Attitude Update -- 5.5.2.Precision Specific-Force Frame Transformation -- 5.5.3.Precision Velocity and Position Updates -- 5.5.4.Effects of Sensor Sampling Interval and Vibration -- 5.5.5.Design Tradeoffs -- 5.6.Initialization and Alignment -- 5.6.1.Position and Velocity Initialization -- 5.6.2.Attitude Initialization -- 5.6.3.Fine Alignment -- 5.7.INS Error Propagation -- 5.7.1.Short-Term Straight-Line Error Propagation -- 5.7.2.Medium- and Long-Term Error Propagation -- 5.7.3.Maneuver-Dependent Errors -- 5.8.Indexed IMU -- 5.9.Partial IMU -- References -- ch. 6 Dead Reckoning, Attitude, and Height Measurement -- 6.1.Attitude Measurement -- 6.1.1.Magnetic Heading -- 6.1.2.Marine Gyrocompass -- 6.1.3.Strapdown Yaw-Axis Gyro -- 6.1.4.Heading from Trajectory -- 6.1.5.Integrated Heading Determination -- 6.1.6.Accelerometer Leveling and Tilt Sensors -- 6.1.7.Horizon Sensing -- 6.1.8.Attitude and Heading Reference System -- 6.2.Height and Depth Measurement -- 6.2.1.Barometric Altimeter -- 6.2.2.Depth Pressure Sensor -- 6.2.3.Radar Altimeter -- 6.3.Odometry -- 6.3.1.Linear Odometry -- 6.3.2.Differential Odometry -- 6.3.3.Integrated Odometry and Partial IMU -- 6.4.Pedestrian Dead Reckoning Using Step Detection -- 6.5.Doppler Radar and Sonar -- 6.6.Other Dead-Reckoning Techniques -- 6.6.1.Correlation-Based Velocity Measurement -- 6.6.2.Air Data -- 6.6.3.Ship's Speed Log -- References -- ch. 7 Principles of Radio Positioning -- 7.1.Radio Positioning Configurations and Methods -- 7.1.1.Self-Positioning and Remote Positioning -- 7.1.2.Relative Positioning -- 7.1.3.Proximity -- 7.1.4.Ranging -- 7.1.5.Angular Positioning -- 7.1.6.Pattern Matching -- 7.1.7.Doppler Positioning -- 7.2.Positioning Signals -- 7.2.1.Modulation Types -- 7.2.2.Radio Spectrum -- 7.3.User Equipment -- 7.3.1.Architecture -- 7.3.2.Signal Timing Measurement -- 7.3.3.Position Determination from Ranging -- 7.4.Propagation, Error Sources, and Positioning Accuracy -- 7.4.1.Ionosphere, Troposphere, and Surface Propagation Effects -- 7.4.2.Attenuation, Reflection, Multipath, and Diffraction -- 7.4.3.Resolution, Noise, and Tracking Errors -- 7.4.4.Transmitter Location and Timing Errors -- 7.4.5.Effect of Signal Geometry -- References -- ch. 8 GNSS: Fundamentals, Signals, and Satellites -- 8.1.Fundamentals of Satellite Navigation -- 8.1.1.GNSS Architecture -- 8.1.2.Signals and Range Measurement -- 8.1.3.Positioning -- 8.1.4.Error Sources and Performance Limitations -- 8.2.The Systems -- 8.2.1.Global Positioning System -- 8.2.2.GLONASS -- 8.2.3.Galileo -- 8.2.4.Beidou -- 8.2.5.Regional Systems -- 8.2.6.Augmentation Systems -- 8.2.7.System Compatibility -- 8.3.GNSS Signals -- 8.3.1.Signal Types -- 8.3.2.Global Positioning System -- 8.3.3.GLONASS -- 8.3.4.Galileo -- 8.3.5.Beidou -- 8.3.6.Regional Systems -- 8.3.7.Augmentation Systems -- 8.4.Navigation Data Messages -- 8.4.1.GPS -- 8.4.2.GLONASS -- 8.4.3.Galileo -- 8.4.4.SBAS -- 8.4.5.Time Base Synchronization -- 8.5.Satellite Orbits and Geometry -- 8.5.1.Satellite Orbits -- 8.5.2.Satellite Position and Velocity -- 8.5.3.Range, Range Rate, and Line of Sight -- 8.5.4.Elevation and Azimuth -- References -- ch. 9 GNSS: User Equipment Processing and Errors -- 9.1.Receiver Hardware and Antenna -- 9.1.1.Antennas -- 9.1.2.Reference Oscillator -- 9.1.3.Receiver Front End -- 9.1.4.Baseband Signal Processor -- 9.2.Ranging Processor -- 9.2.1.Acquisition -- 9.2.2.Code Tracking -- 9.2.3.Carrier Tracking -- 9.2.4.Tracking Lock Detection -- 9.2.5.Navigation-Message Demodulation -- 9.2.6.Carrier-Power-to-Noise-Density Measurement -- 9.2.7.Pseudo-Range, Pseudo-Range-Rate, and Carrier-Phase Measurements -- 9.3.Range Error Sources -- 9.3.1.Ephemeris Prediction and Satellite Clock Errors -- 9.3.2.Ionosphere and Troposphere Propagation Errors -- 9.3.3.Tracking Errors -- 9.3.4.Multipath, Nonline-of-Sight, and Diffraction -- 9.4.Navigation Processor -- 9.4.1.Single-Epoch Navigation Solution -- 9.4.2.Filtered Navigation Solution -- 9.4.3.Signal Geometry and Navigation Solution Accuracy -- 9.4.4.Position Error Budget -- References -- ch.…”
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  5. 24285

    Principles of GNSS, inertial, and multisensor integrated navigation systems / by Groves, Paul D. (Paul David)

    Published 2013
    Table of Contents: “…Machine generated contents note: ch. 1 Introduction -- 1.1.Fundamental Concepts -- 1.2.Dead Reckoning -- 1.3.Position Fixing -- 1.3.1.Position-Fixing Methods -- 1.3.2.Signal-Based Positioning -- 1.3.3.Environmental Feature Matching -- 1.4.The Navigation System -- 1.4.1.Requirements -- 1.4.2.Context -- 1.4.3.Integration -- 1.4.4.Aiding -- 1.4.5.Assistance and Cooperation -- 1.4.6.Fault Detection -- 1.5.Overview of the Book -- References -- ch. 2 Coordinate Frames, Kinematics, and the Earth -- 2.1.Coordinate Frames -- 2.1.1.Earth-Centered Inertial Frame -- 2.1.2.Earth-Centered Earth-Fixed Frame -- 2.1.3.Local Navigation Frame -- 2.1.4.Local Tangent-Plane Frame -- 2.1.5.Body Frame -- 2.1.6.Other Frames -- 2.2.Attitude, Rotation, and Resolving Axes Transformations -- 2.2.1.Euler Attitude -- 2.2.2.Coordinate Transformation Matrix -- 2.2.3.Quaternion Attitude -- 2.2.4.Rotation Vector -- 2.3.Kinematics -- 2.3.1.Angular Rate -- 2.3.2.Cartesian Position -- 2.3.3.Velocity -- 2.3.4.Acceleration -- 2.3.5.Motion with Respect to a Rotating Reference Frame -- 2.4.Earth Surface and Gravity Models -- 2.4.1.The Ellipsoid Model of the Earth's Surface -- 2.4.2.Curvilinear Position -- 2.4.3.Position Conversion -- 2.4.4.The Geoid, Orthometric Height, and Earth Tides -- 2.4.5.Projected Coordinates -- 2.4.6.Earth Rotation -- 2.4.7.Specific Force, Gravitation, and Gravity -- 2.5.Frame Transformations -- 2.5.1.Inertial and Earth Frames -- 2.5.2.Earth and Local Navigation Frames -- 2.5.3.Inertial and Local Navigation Frames -- 2.5.4.Earth and Local Tangent-Plane Frames -- 2.5.5.Transposition of Navigation Solutions -- References -- ch. 3 Kalman Filter-Based Estimation -- 3.1.Introduction -- 3.1.1.Elements of the Kalman Filter -- 3.1.2.Steps of the Kalman Filter -- 3.1.3.Kalman Filter Applications -- 3.2.Algorithms and Models -- 3.2.1.Definitions -- 3.2.2.Kalman Filter Algorithm -- 3.2.3.System Model -- 3.2.4.Measurement Model -- 3.2.5.Kalman Filter Behavior and State Observability -- 3.2.6.Closed-Loop Kalman Filter -- 3.2.7.Sequential Measurement Update -- 3.3.Implementation Issues -- 3.3.1.Tuning and Stability -- 3.3.2.Algorithm Design -- 3.3.3.Numerical Issues -- 3.3.4.Time Synchronization -- 3.3.5.Kalman Filter Design Process -- 3.4.Extensions to the Kalman Filter -- 3.4.1.Extended and Linearized Kalman Filter -- 3.4.2.Unscented Kalman Filter -- 3.4.3.Time-Correlated Noise -- 3.4.4.Adaptive Kalman Filter -- 3.4.5.Multiple-Hypothesis Filtering -- 3.4.6.Kalman Smoothing -- 3.5.The Particle Filter -- References -- ch. 4 Inertial Sensors -- 4.1.Accelerometers -- 4.1.1.Pendulous Accelerometers -- 4.1.2.Vibrating-Beam Accelerometers -- 4.2.Gyroscopes -- 4.2.1.Optical Gyroscopes -- 4.2.2.Vibratory Gyroscopes -- 4.3.Inertial Measurement Units -- 4.4.Error Characteristics -- 4.4.1.Biases -- 4.4.2.Scale Factor and Cross-Coupling Errors -- 4.4.3.Random Noise -- 4.4.4.Further Error Sources -- 4.4.5.Vibration-Induced Errors -- 4.4.6.Error Models -- References -- ch. 5 Inertial Navigation -- 5.1.Introduction to Inertial Navigation -- 5.2.Inertial-Frame Navigation Equations -- 5.2.1.Attitude Update -- 5.2.2.Specific-Force Frame Transformation -- 5.2.3.Velocity Update -- 5.2.4.Position Update -- 5.3.Earth-Frame Navigation Equations -- 5.3.1.Attitude Update -- 5.3.2.Specific-Force Frame Transformation -- 5.3.3.Velocity Update -- 5.3.4.Position Update -- 5.4.Local-Navigation-Frame Navigation Equations -- 5.4.1.Attitude Update -- 5.4.2.Specific-Force Frame Transformation -- 5.4.3.Velocity Update -- 5.4.4.Position Update -- 5.4.5.Wander-Azimuth Implementation -- 5.5.Navigation Equations Optimization -- 5.5.1.Precision Attitude Update -- 5.5.2.Precision Specific-Force Frame Transformation -- 5.5.3.Precision Velocity and Position Updates -- 5.5.4.Effects of Sensor Sampling Interval and Vibration -- 5.5.5.Design Tradeoffs -- 5.6.Initialization and Alignment -- 5.6.1.Position and Velocity Initialization -- 5.6.2.Attitude Initialization -- 5.6.3.Fine Alignment -- 5.7.INS Error Propagation -- 5.7.1.Short-Term Straight-Line Error Propagation -- 5.7.2.Medium- and Long-Term Error Propagation -- 5.7.3.Maneuver-Dependent Errors -- 5.8.Indexed IMU -- 5.9.Partial IMU -- References -- ch. 6 Dead Reckoning, Attitude, and Height Measurement -- 6.1.Attitude Measurement -- 6.1.1.Magnetic Heading -- 6.1.2.Marine Gyrocompass -- 6.1.3.Strapdown Yaw-Axis Gyro -- 6.1.4.Heading from Trajectory -- 6.1.5.Integrated Heading Determination -- 6.1.6.Accelerometer Leveling and Tilt Sensors -- 6.1.7.Horizon Sensing -- 6.1.8.Attitude and Heading Reference System -- 6.2.Height and Depth Measurement -- 6.2.1.Barometric Altimeter -- 6.2.2.Depth Pressure Sensor -- 6.2.3.Radar Altimeter -- 6.3.Odometry -- 6.3.1.Linear Odometry -- 6.3.2.Differential Odometry -- 6.3.3.Integrated Odometry and Partial IMU -- 6.4.Pedestrian Dead Reckoning Using Step Detection -- 6.5.Doppler Radar and Sonar -- 6.6.Other Dead-Reckoning Techniques -- 6.6.1.Correlation-Based Velocity Measurement -- 6.6.2.Air Data -- 6.6.3.Ship's Speed Log -- References -- ch. 7 Principles of Radio Positioning -- 7.1.Radio Positioning Configurations and Methods -- 7.1.1.Self-Positioning and Remote Positioning -- 7.1.2.Relative Positioning -- 7.1.3.Proximity -- 7.1.4.Ranging -- 7.1.5.Angular Positioning -- 7.1.6.Pattern Matching -- 7.1.7.Doppler Positioning -- 7.2.Positioning Signals -- 7.2.1.Modulation Types -- 7.2.2.Radio Spectrum -- 7.3.User Equipment -- 7.3.1.Architecture -- 7.3.2.Signal Timing Measurement -- 7.3.3.Position Determination from Ranging -- 7.4.Propagation, Error Sources, and Positioning Accuracy -- 7.4.1.Ionosphere, Troposphere, and Surface Propagation Effects -- 7.4.2.Attenuation, Reflection, Multipath, and Diffraction -- 7.4.3.Resolution, Noise, and Tracking Errors -- 7.4.4.Transmitter Location and Timing Errors -- 7.4.5.Effect of Signal Geometry -- References -- ch. 8 GNSS: Fundamentals, Signals, and Satellites -- 8.1.Fundamentals of Satellite Navigation -- 8.1.1.GNSS Architecture -- 8.1.2.Signals and Range Measurement -- 8.1.3.Positioning -- 8.1.4.Error Sources and Performance Limitations -- 8.2.The Systems -- 8.2.1.Global Positioning System -- 8.2.2.GLONASS -- 8.2.3.Galileo -- 8.2.4.Beidou -- 8.2.5.Regional Systems -- 8.2.6.Augmentation Systems -- 8.2.7.System Compatibility -- 8.3.GNSS Signals -- 8.3.1.Signal Types -- 8.3.2.Global Positioning System -- 8.3.3.GLONASS -- 8.3.4.Galileo -- 8.3.5.Beidou -- 8.3.6.Regional Systems -- 8.3.7.Augmentation Systems -- 8.4.Navigation Data Messages -- 8.4.1.GPS -- 8.4.2.GLONASS -- 8.4.3.Galileo -- 8.4.4.SBAS -- 8.4.5.Time Base Synchronization -- 8.5.Satellite Orbits and Geometry -- 8.5.1.Satellite Orbits -- 8.5.2.Satellite Position and Velocity -- 8.5.3.Range, Range Rate, and Line of Sight -- 8.5.4.Elevation and Azimuth -- References -- ch. 9 GNSS: User Equipment Processing and Errors -- 9.1.Receiver Hardware and Antenna -- 9.1.1.Antennas -- 9.1.2.Reference Oscillator -- 9.1.3.Receiver Front End -- 9.1.4.Baseband Signal Processor -- 9.2.Ranging Processor -- 9.2.1.Acquisition -- 9.2.2.Code Tracking -- 9.2.3.Carrier Tracking -- 9.2.4.Tracking Lock Detection -- 9.2.5.Navigation-Message Demodulation -- 9.2.6.Carrier-Power-to-Noise-Density Measurement -- 9.2.7.Pseudo-Range, Pseudo-Range-Rate, and Carrier-Phase Measurements -- 9.3.Range Error Sources -- 9.3.1.Ephemeris Prediction and Satellite Clock Errors -- 9.3.2.Ionosphere and Troposphere Propagation Errors -- 9.3.3.Tracking Errors -- 9.3.4.Multipath, Nonline-of-Sight, and Diffraction -- 9.4.Navigation Processor -- 9.4.1.Single-Epoch Navigation Solution -- 9.4.2.Filtered Navigation Solution -- 9.4.3.Signal Geometry and Navigation Solution Accuracy -- 9.4.4.Position Error Budget -- References -- ch.…”
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  6. 24286
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  8. 24288

    Determinants of risk disclosures in Kenyan listed companies by Wachira, David Muturi

    Published 2021
    “…A regression analysis was conducted using the random effect model to determine the relationship between the disclosure index and firms’ characteristics. The results show that risk disclosure was positively related to gearing level, company size, profitability, and the industry type. …”
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    The Efficacy of Cognitive Behavioural Therapy on Depression Among Family Caregivers of End Stage Kidney Disease Patients in Nairobi County, Kenya by Waiyaki, Winnie

    Published 2019
    “…The incidence of depression is high among family caregivers (FCGs) of End Stage Kidney Disease (ESKD). …”
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    Article
  12. 24292

    Comparative Analysis of the Effectiveness of Sand Fly Traps with Different Baits by Mong’are, Samuel, Ng’ang’a Zipporah, Ngumbi, Philip, Ingonga, Johnstone M., Ngure, Peter Kamau

    Published 2024
    “…Defibrinated blood from cattle, goat, sheep and chicken; urine from cattle, sheep and goat and fruits: grapes, mangoes, bananas and apples were placed inside each trap to act as sand fly attractants. A total of 1302 sand flies were collected within 3 trapping nights. …”
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