Personal information

Marine robotics, autonomy, control theory
United States

Activities

Employment (4)

Virginia Tech: Blacksburg, Virginia, US

2012 to present | Professor (ECE)
Employment
Source: Self-asserted source
Dan Stilwell

Virginia Tech: Blacksburg, Virginia, US

2007 to 2012 | Associate Professor (ECE)
Employment
Source: Self-asserted source
Dan Stilwell

Virginia Tech: Blacksburg, Virginia, US

2002 to 2007 | Assistant Professor (ECE)
Employment
Source: Self-asserted source
Dan Stilwell

US Naval Academy: Annapolis, MD, US

1998 to 2002 | Assistant Professor (Weapons and Systems Engineering)
Employment
Source: Self-asserted source
Dan Stilwell

Education and qualifications (3)

Johns Hopkins University: Baltimore, MD, US

1999 | PhD (ECE)
Education
Source: Self-asserted source
Dan Stilwell

Virginia Tech: Blacksburg, Virginia, US

1993 | MS (ECE)
Education
Source: Self-asserted source
Dan Stilwell

University of Massachusetts Amherst: Amherst, MA, US

1991 | BS (ECE)
Education
Source: Self-asserted source
Dan Stilwell

Professional activities (5)

XPRIZE Foundation: Culver City, California, US

2018 | Milestone Award, awarded to VT Ocean XPRIZE team
Distinction
Source: Self-asserted source
Dan Stilwell

American Society of Mechanical Engineers: NY, NY, US

2015 | Rudolf Kalman Best Paper
Distinction
Source: Self-asserted source
Dan Stilwell

Virginia Tech: Blacksburg, Virginia, US

2004 | Outstanding New Assistant Professor (College of Engineering)
Distinction
Source: Self-asserted source
Dan Stilwell

Office of Naval Research: VA, VA, US

2003 | Young Investigator Program award
Distinction
Source: Self-asserted source
Dan Stilwell

National Science Foundation: VA, VA, US

2003 | Faculty Early Career Development (CAREER) Program award
Distinction
Source: Self-asserted source
Dan Stilwell

Funding (66)

Rapid Autonomy Integration Lab (RAIL) Process

2021-01 to 2021-12 | Grant
US Navy (PMS 406) (Washington DC, US)
Source: Self-asserted source
Dan Stilwell

Planning Under Uncertainty for Advanced Sensor Networks

2020-09 to 2023-09 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Software Library for Real-Time Control

2020-09 to 2021-09 | Grant
U.S. Naval Research Laboratory (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Airdropped UUV for Rapid Deployment

2020-04 to 2020-08 | Grant
Applied Physics Laboratory, Johns Hopkins University (Md., Md., US)
Source: Self-asserted source
Dan Stilwell

Towards Commercialization of an Obstacle Avoidance Sonar

2020-01 to 2021-01 | Grant
Commonwealth Center of Innovation for Autonomous Systems (C2IAS) (Blacksburg, Virginia, US)
Source: Self-asserted source
Dan Stilwell

Design and Development of Specialized Autonomous Maritime Platforms

2019-07 to 2021-06 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Collaborative Subsea Mapping

2019-03 to 2022-02 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Deep Diving AUV

2019-01 to 2021-06 | Grant
Dive Technologies (Boston, MA, US)
Source: Self-asserted source
Dan Stilwell

Collaborative Subsea Navigation

2018-12 to 2019-12 | Grant
Ministry of Defense Israel (New York, New York, US)
Source: Self-asserted source
Dan Stilwell

AUV Autonomy Algorithms and Experiments

2018-08 to 2019-08 | Grant
U.S. Naval Research Laboratory (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Omniscient Planning and Control Environment for the Naval Enterprise

2018-07 to 2021-09 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

AUV obstacle avoidance

2018-07 to 2020-12 | Grant
ATLAS-NA (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Acquisition of AUVs for Experiments in Collaborative Autonomy (DURIP)

2018-05 to 2020-05 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Project Einstein

2018-02 to 2020-05 | Grant
Huntington Industries (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Exploring Security of Underwater Cyber-Physical Systems

2017-12 to 2020-01 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Trawl-Resistant Self-Mooring AUV, Phase III

2017-05 to 2018-04 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Trawl-Resistant Self-Mooring AUV: System Integration

2016-09 to 2018-03 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Small AUV Tows a Large Payload

2016-08 to 2018-08 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Hybrid UA/UV: Support for Barron Associates, Barron Associates (ONR SBIR phase I)

2016-08 to 2017-05 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Small AUV Tows and Large Payload

2016-05 to 2019-05 | Grant
Office of Naval Research (VA, VA, US)
GRANT_NUMBER:

N00014-16-1-2589

Source: Self-asserted source
Dan Stilwell

Adaptive Planning for Improved Search

2016-01 to 2018-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Agile Control for Inspection

2015-08 to 2016-08 | Grant
Center for UAS (an NSF I/UCRC) (Boulder, CO, US)
Source: Self-asserted source
Dan Stilwell

Subsea Inertial Navigation

2015-08 to 2016-08 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Toward Control of Universal Scaling in Critical Dynamics

2015-05 to 2016-02 | Grant
Army Research Office (NC, NC, US)
Source: Self-asserted source
Dan Stilwell

SBIR Phase II: Feature-Based Localization and Navigation for Miniature Underwater Vehicle,

2014-09 to 2016-07 | Grant
Defense Advanced Research Projects Agency (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

SBIR Phase II: Feature-Based Localization and Navigation for Miniature Underwater Vehicles

2014-08 to 2016-07 | Grant
Defense Advanced Research Projects Agency (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Control and Navigation for Tank Inspection Robot (Year 3)

2014-08 to 2015-08 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Trawl-Resistant Self-Mooring AUV, Phase II

2014-01 to 2015-05 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Control and Navigation for Tank Inspection Robot (Year 2)

2013-08 to 2014-08 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Riverine Autonomy

2013-01 to 2014-08 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Control and Navigation for Tank Inspection Robot (Year 1)

2012-08 to 2013-08 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Rechargeable AUV Battery

2012-08 to 2013-08 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Shepherd tail section

2012-03 to 2013-05 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Stochastic Search and Survey for Subsea Applications

2012-01 to 2016-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Sensing and autonomy for riverine vessels

2012-01 to 2015-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Trawl-Resistant Autonomous Mooring System

2011-11 to 2013-05 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Naval Engineering Education Consortium (NEEC) Year 2

2011-10 to 2012-09 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Support for a Propulsion-Enabled Control System for Precise Submarine Maneuvering

2011-03 to 2013-01 | Grant
Impact Technologies, LLC (Rochester, NY, US)
Source: Self-asserted source
Dan Stilwell

General purpose AUV

2010-10 to 2011-09 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Shepherd AUV

2010-08 to 2012-03 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

Naval Engineering Education Consortium (NEEC) Year 1

2010-08 to 2011-08 | Grant
Naval Sea Systems Command (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Enhanced Riverine Drifter

2010-07 to 2011-01 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Mobile Agent-Based Autonomous Data Fusion for Distributed Sensors

2010-05 to 2012-03 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Autonomous USV Navigation in Riverine Environments

2009-10 to 2011-09 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Model Classes, Approximation, And Metrics For Dynamic Processing Of Urban Terrain Data

2009-10 to 2011-09 | Grant
Air Force Office of Scientific Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Project CAIMAN seedling

2009-05 to 2009-12 | Grant
Defense Advanced Research Projects Agency (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Active sensing for autonomous vehicle teams

2008-12 to 2009-12 | Grant
Lockheed Martin (Md., Md., US)
Source: Self-asserted source
Dan Stilwell

MARS Development

2008-10 to 2011-09 | Grant
Naval Oceanographic Office (MS, MS, US)
Source: Self-asserted source
Dan Stilwell

USV Autonomy in Riverine Environments

2008-01 to 2012-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Rapid Environmental Assessment for Wide Area Search

2007-01 to 2009-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Fast Coordination for Adaptive Group Behaviors and Distributed Signal Processing

2007-01 to 2009-01 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Adaptive Sampling for Mine Countermeasure Applications

2007-01 to 2008-01 | Grant
Naval Surface Warfare Center (DC, DC, US)
Source: Self-asserted source
Dan Stilwell

Coordinated Sensing and Control for Surveillance and Tracking by Heterogeneous Autonomous Vehicle Teams

2006-05 to 2009-09 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Continued Development of a High-Speed AUV

2006-05 to 2006-12 | Grant
Progeny Systems (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Development of a 6DOF Dynamic Model for a Small High-Speed AUV

2006-05 to 2006-06 | Grant
Progeny Systems (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Development of a High-Speed AUV

2006-05 to 2006-05 | Grant
Naval Undersea Warfare Center (RI, RI, US)
Source: Self-asserted source
Dan Stilwell

Energy Scavenging Unmanned Surface Vehicle

2005-09 to 2005-10 | Grant
UOV Company (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Initial Concept Study For A Small High-Speed AUV

2005-09 to 2005-10 | Grant
Naval Undersea Warfare Center (RI, RI, US)
Source: Self-asserted source
Dan Stilwell

Heterogeneous Teams of Autonomous Vehicles: Advanced Sensing and Control

2005-07 to 2006-07 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Magnetoelectric Sensors for Detection and Mapping Applications with UUVs

2005-06 to 2007-05 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Low-Cost Biodegradable Massive Sensor Networks for Submarine Detection, Phase II

2005-05 to 2007-05 | Grant
Defense Advanced Research Projects Agency (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Adaptive Sampling in Dynamic Environments using AUVs

2005-05 to 2006-05 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Rapid environmental assessment with real-time mission updates using cooperating autonomous underwater vehicles

2004-07 to 2006-12 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Collaborative Research: A Simulation Environment to Enable Development of Adaptive Sampling Algorithms for Autonomous Underwater Vehicles

2003-12 to 2005-07 | Grant
National Science Foundation (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Rapid and Adaptive Marine Reconnaissance Using Platoons of Miniature AUVs

2003-05 to 2007-06 | Grant
Office of Naval Research (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

CAREER: Cooperating Underwater Robots: Theory and Practice, National Science Foundation

2003-01 to 2008-12 | Grant
National Science Foundation (VA, VA, US)
Source: Self-asserted source
Dan Stilwell

Works (50 of 116)

Items per page:
Page 1 of 3

Multi-Level Generative Chaotic Recurrent Network for Image Inpainting

Proc. IEEE Winter Conference on Applications of Computer Vision (WACV)
2021 | Conference paper
Source: Self-asserted source
Dan Stilwell

A decision-theoretic approach to acquire environmental information for improved subsea search performance

Ocean Engineering
2020 | Journal article
Source: Self-asserted source
Dan Stilwell

A Distributed Connectivity Maintenance Algorithm for a Network of Unmanned Underwater Vehicles Under Communication Constraints

Proc. IEEE Conference on Decision and Control (CDC)
2020 | Conference paper
Source: Self-asserted source
Dan Stilwell

An Approach to Reduce Communication for Multi-agent Mapping Applications

Proc. IEEE/RSJ Intelligent Robots and Systems (IROS)
2020 | Conference paper
Source: Self-asserted source
Dan Stilwell

Extended Performance Guarantees for Receding Horizon Search with Terminal Cost

Proc. IEEE/RSJ Intelligent Robots and Systems (IROS)
2020 | Conference paper
Source: Self-asserted source
Dan Stilwell

Hydrodynamic Parameter Estimation for Autonomous Underwater Vehicles

IEEE Journal of Oceanic Engineering
2020 | Journal article
Source: Self-asserted source
Dan Stilwell

Intrinsic and Extrinsic Approximation of Koopman Operators over Manifolds

Proc. IEEE Conference on Decision and Control (CDC)
2020 | Conference paper
Source: Self-asserted source
Dan Stilwell

Robust Unsupervised Cleaning of Underwater Bathymetric Point Cloud Data

Proc. British Machine Vision Virtual Conference (BMVC2020)
2020 | Conference paper
Source: Self-asserted source
Dan Stilwell

A Comparison of Kriging and Cokriging for Estimation of Underwater Acoustic Communication Performance

Proc. 14th International Conference on Underwater Networks & Systems (WUWNet’19)
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

CFD Investigation Of Hull-Rudder Interaction For Improved Maneuvering Models

Proc. SNAME 2019 Maritime Technology Conference
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

Development of a Simulation Environment for Evaluation of a Forward Looking Sonar System for Small AUVs

Proc. IEEE/MTS OCEANS
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

Experimental Results in Bearings-only Tracking using the Sequential Monte-Carlo Probability Hypothesis Density Filter

Proc. Signal Processing, Sensor/Information Fusion, and Target Recognition XXVIII
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

Online Planning for Autonomous Underwater Vehicles Performing Information Gathering Tasks in Large Subsea Environments

Proc. IEEE/RSJ Intelligent Robots and Systems (IROS)
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

Performance Guarantees for Receding Horizon Search with Terminal Cost

Proc. IEEE/RSJ Intelligent Robots and Systems (IROS)
2019 | Conference paper
Source: Self-asserted source
Dan Stilwell

An Analysis of Simplifying Model Assumptions for Autonomous Underwater Vehicles

Proc. IEEE/MTS OCEANS
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Assessment of AUV Hydrodynamic Coefficients from Analytic and Semi-Empirical Methods

Proc. IEEE/MTS OCEANS
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Design of Ducted Propulsors for Towing Autonomous Underwater Vehicles

Proc. IEEE/MTS OCEANS
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Hydrodynamic Analysis of an Underwater Vehicle in Free Dive

Proc. IEEE/MTS OCEANS
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Receding Horizon H_\infty Control of Hidden Markov Jump Linear Systems

Proc. IEEE Conference on Decision and Control (CDC)
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Steering Plane Dynamics of a Small Autonomous Underwater Vehicle that Tows a Large Payload

Proc. IEEE/OES Autonomous Underwater Vehicle Workshop (AUV)
2018 | Conference paper
Source: Self-asserted source
Dan Stilwell

Bridge Geometry Measurements with an Unmanned Aerial Vehicle Flown in Local Wind Disturbances

Proc. of the Transportation Research Board 96th Annual Meeting
2017 | Conference paper
Source: Self-asserted source
Dan Stilwell

Towards real-time search planning in subsea environments

Proc. IEEE/RSJ Intelligent Robots and Systems (IROS)
2017 | Conference paper
Source: Self-asserted source
Dan Stilwell

Acquiring environmental information yields better anticipated search performance

Proc. IEEE/MTS OCEANS
2016 | Conference paper
Source: Self-asserted source
Dan Stilwell

An $\mathcalH_∞$ loop-shaping design procedure for attitude control of an AUV

Proc. IEEE/MTS OCEANS
2016 | Conference paper
Source: Self-asserted source
Dan Stilwell

Multi-agent motion planning using Bayes risk

Robotics and Autonomous Systems
2016 | Journal article
Source: Self-asserted source
Dan Stilwell

Range-based AUV navigation expressed in geodetic coordinates

Proc. IEEE/MTS OCEANS
2016 | Conference paper
Source: Self-asserted source
Dan Stilwell

Stability and Disturbance Attenuation for Markov Jump Linear Systems with Time-Varying Transition Probabilities

IEEE Transactions on Automatic Control
2016 | Journal article
Source: Self-asserted source
Dan Stilwell

A comparison of hydrodynamic damping models using least-squares and adaptive identifier methods for autonomous underwater vehicles

Proc. IEEE/MTS OCEANS
2015 | Conference paper
Source: Self-asserted source
Dan Stilwell

Optimal relative view angles for an object viewed multiple times

Proc. SPIE 9454, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XX
2015 | Conference paper
Source: Self-asserted source
Dan Stilwell

Utility-based adaptive path planning for subsea search

Proc. IEEE/MTS OCEANS
2015 | Conference paper
Source: Self-asserted source
Dan Stilwell

Design elements of a small AUV for bathymetric surveys

Proc. IEEE/OES Autonomous Underwater Vehicles (AUV)
2014 | Conference paper
Source: Self-asserted source
Dan Stilwell

Distributed Full-State Observers With Limited Communication and Application to Cooperative Target Localization

J. Dyn. Sys., Meas., Control.
2014 | Journal article
Source: Self-asserted source
Dan Stilwell

Energy-aware control: $l_2$ gain for closed-loop systems implemented with stochastic schedulers

Proc. American Control Conference
2013 | Conference paper
Source: Self-asserted source
Dan Stilwell

Fast Path Re-planning Based on Fast Marching and Level Sets

Journal of Intelligent & Robotic Systems
2013 | Journal article
Source: Self-asserted source
Dan Stilwell

A topological map based approach to long range operation of an unmanned surface vehicle

Proc. American Control Conference
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

An approach to multi-agent area protection using Bayes risk

Proc. IEEE International Conference on Robotics and Automation
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

Design and testing of a Self-Mooring AUV

Proc. IEEE/MTS OCEANS
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

Guidance and control of an unmanned surface vehicle exhibiting sternward motion

Proc. IEEE/MTS OCEANS
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

Stochastic target interception in non-convex domain using MILP

Proc. American Control Conference
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

Theory and experimental results for the multiple aspect coverage problem

Ocean Engineering
2012 | Journal article
Source: Self-asserted source
Dan Stilwell

Toward a mission value for subsea search with bottom-type variability

Proc. IEEE/MTS OCEANS
2012 | Conference paper
Source: Self-asserted source
Dan Stilwell

A receding horizon approach to generating dynamically feasible plans for vehicles that operate over large areas

Proc. IEEE/RSJ International Conference on Intelligent Robots and Systems
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

A solution to the multiple aspect coverage problem

Proc. IEEE International Conference on Robotics and Automation
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

An approach to subsea survey for safe naval transit

Proc. IEEE/MTS OCEANS
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

Formation Control of Platoons of Mobile Sensors With Intermittent Communications

Proc. ASME Dynamic Systems and Control Conference
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

Multiple agent coordination for stochastic target interception using MILP

Proc. IEEE/RSJ International Conference on Intelligent Robots and Systems
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

Robust control for an autonomous underwater vehicle that suppresses pitch and yaw coupling

Ocean Engineering
2011 | Journal article
Source: Self-asserted source
Dan Stilwell

Toward coordinated sensor motion for classification: An example of intrusion detection using Bayes risk

Proc. IEEE International Conference on Robotics and Automation
2011 | Conference paper
Source: Self-asserted source
Dan Stilwell

A receding horizon controller for motion planning in the presence of moving obstacles

Proc. IEEE International Conference on Robotics and Automation
2010 | Conference paper
Source: Self-asserted source
Dan Stilwell

Control-Oriented Planar Motion Modeling of Unmanned Surface Vehicles

Proc. IEEE/MTS OCEANS
2010 | Conference paper
Source: Self-asserted source
Dan Stilwell
Items per page:
Page 1 of 3