335 research outputs found
Lessons Learned: How to Organize Your Laboratory Meetings
No full textIn this issue, JAB continues a series of editorials from highlyimpactful faculty and researchers on“lessons learned”through-out their careers or lives. The hope is that the rest of us can benefitfrom their experiences. I would like to thank these individuals forsharing their thoughts with us.—Michael Madigan, Editor-in-ChiefNicholas Stergiou([email protected])is with the Divisionof Biomechanics and Research Development, University of Ne-braska Omaha, Omaha, NE; and the College of Public Health,University of Nebraska Medical Center, Omaha, NE
The Center of Pressure Data from "The Rim and Ancient Mariner: The Nautical Horizon Affects Postural Sway in Older Adults"
No full textThis csv file contains the raw center of pressure data measured in centimeter (cm). They were collected on an AMTI force plate across two days from 18 participants. Participant 1-11 participated on day 1. Participant 12-18 participated on day 2. Participant 17 discontinued mid study and the data was excluded from analysis. Each column is a time series evenly distributed across the duration of a trial (60 seconds). Each participant took part in 6 trials: 3 trials for the far condition and 3 trials for the near condition. Each trial yielded two columns of data for a participant. One column of data recorded the movement in the mediolateral (ML) axis, and the other column recorded the movement in the anterior-posterior axis (AP). The AP and ML axes act as coordinates for the x-y location of the center of pressure on the force plate. The columns in the csv file are ordered as thus: The first three columns are about P1 (Participant 1) for the ML axis in the far condition. The next three columns are about P2 for the ML axis in the far condition. The same pattern goes on until we reached Participant 18. Then the sequence repeats for the AP axis in the far condition, then for the ML axis in the near condition, and finally for the AP axis in the near condition.This dataset contains the raw center of pressure data collected on the Enrichment Voyage (www.semesteratsea.org) on an AMTI (Advanced Mechanical Technology, Inc.) force plate. The data was collected across two days from 18 participants. There were two conditions (the near condition and the far condition) split evenly across six trials in a randomized order. In the trials of the near condition, participants stood on the force plate with their hands comfortably on their sides with their shoes on. They maintained their gaze on a tripod located 50 cm from their heel for the duration of the trial. In the trials of the far condition, everything remains the same, except that the tripod was removed, and participants were instructed to look at the horizon. Trials were 60 seconds long.Munafo, Justin G; Wade, Michael G; Stoffregen, Thomas A; Stergiou, Nicholas. (2016). The Center of Pressure Data from "The Rim and Ancient Mariner: The Nautical Horizon Affects Postural Sway in Older Adults". Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D6MG63
HPER Biomechanics Laboratory 2004 Annual Report: A Surveillance of the Neuromuscular System, Issue 3
No full textThis issue features 2004 - A Great Year for External Funding: Three Grants Awarded to Dr. Stergiou, Robotic Surgery Research is Funded by the Nebraska Research Initiative, Federal Grant is Awarded for the Study of the Development of Posture in Children with Cerebral Palsy, The Nebraska Research Initiative funds our Innovative Research in Gait Analysis, Collaboration with the Department of Surgery of the University of Nebraska Medical Center on the Effects of Peripheral Arterial Disease on Gait, Omaha Media Features Nicholas Stergiou, Dr. Stergiou participates in an NIH Review Panel, Prestigious Teaching Award for Dr. Stergiou, NASA Visits HPER Biomechanics Lab, Walking, a Neural Network and a Simple Robot, Sabbatical Strengthens Collaborations with Other Laboratories, Our Lab helps High School Students and Teachers, New Textbook Published and Other Exciting News/Continuing Collaboration.https://digitalcommons.unomaha.edu/nbcfnewsletter/1002/thumbnail.jp
\u3ci\u3eMedicine Meets Virtual Reality 17\u3c/i\u3e
No full textChapter, A Virtual Reality Training Program for Improvement of Robotic Surgical Skills, co-authored by Mukul Mukherjee and Nicholas Stergiou, UNO faculty members.
Chapter, Consistency of Performance of Robot-Assisted Surgical Tasks in Virtual Reality, co-authored by Mukul Mukherjee and Nicholas Stergiou, UNO faculty members.
The 17th annual Medicine Meets Virtual Reality (MMVR17) was held January 19-22, 2009, in Long Beach, CA, USA. The conference is well established as a forum for emerging data-centered technologies for medical care and education. Each year, it brings together an international community of computer scientists and engineers, physicians and surgeons, medical educators and students, military medicine specialists and biomedical futurists. MMVR emphasizes inter-disciplinary collaboration in the development of more efficient and effective physician training and patient care. The MMVR17 proceedings collect 108 papers by conference lecture and poster presenters. These papers cover recent developments in biomedical simulation and modeling, visualization and data fusion, haptics, robotics, sensors and other related information-based technologies. Key applications include medical education and surgical training, clinical diagnosis and therapy, physical rehabilitation, psychological assessment, telemedicine and more. From initial vision and prototypes, through assessment and validation, to clinical and academic utilization and commercialization - MMVR explores the state-of-the-art and looks toward healthcare’s future. The proceedings volume will interest physicians, surgeons and other medical professionals interested in emerging and future tools for diagnosis and therapy; educators responsible for training the next generation of doctors and scientists; IT and medical device engineers creating state-of-the-art and next-generation simulation, imaging, robotics and communication systems; data technologists creating systems for gathering, processing and distributing medical intelligence; military medicine specialists addressing the challenges of warfare and defense health needs; and biomedical futurists and investors who want to understand where the field is headed.https://digitalcommons.unomaha.edu/facultybooks/1233/thumbnail.jp
Lower Bounds for Uniform Machine Scheduling Using Decision Diagrams
No full textWe propose a relaxed decision diagram (DD) formulation for obtaining lower bounds on uniform machine scheduling instances, based on separators to separate jobs on different machines. Experiments on the total tardiness for instances with tight due times show that for obtaining nontrivial bounds, it is important to partition the DD nodes on a layer based on their machine finishing time. When the number of jobs is small, DDs provide stronger bounds in less time than a time-indexed LP relaxation.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Algorithmic
Nonlinear Analysis for Human Movement Variability
No full textHow Does the Body’s Motor Control System Deal with Repetition?
While the presence of nonlinear dynamics can be explained and understood, it is difficult to be measured. A study of human movement variability with a focus on nonlinear dynamics, Nonlinear Analysis for Human Movement Variability, examines the characteristics of human movement within this framework, explores human movement in repetition, and explains how and why we analyze human movement data. It takes an in-depth look into the nonlinear dynamics of systems within and around us, investigates the temporal structure of variability, and discusses the properties of chaos and fractals as they relate to human movement.
Providing a foundation for the use of nonlinear analysis and the study of movement variability in practice, the book describes the nonlinear dynamical features found in complex biological and physical systems, and introduces key concepts that help determine and identify patterns within the fluctuations of data that are repeated over time. It presents commonly used methods and novel approaches to movement analysis that reveal intriguing properties of the motor control system and introduce new ways of thinking about variability, adaptability, health, and motor learning.
In addition, this text: Demonstrates how nonlinear measures can be used in a variety of different tasks and populations Presents a wide variety of nonlinear tools such as the Lyapunov exponent, surrogation, entropy, and fractal analysis Includes examples from research on how nonlinear analysis can be used to understand real-world applications Provides numerous case studies in postural control, gait, motor control, and motor development
Nonlinear Analysis for Human Movement Variability advances the field of human movement variability research by dissecting human movement and studying the role of movement variability. The book proposes new ways to use nonlinear analysis and investigate the temporal structure of variability, and enables engineers, movement scientists, clinicians, and those in related disciplines to effectively apply nonlinear analysis in practice.https://digitalcommons.unomaha.edu/biomechanicsbooks/1002/thumbnail.jp
\u3ci\u3eMedicine Meets Virtual Reality 15\u3c/i\u3e
No full textChapter, Virtual Reality for Robotic Laparoscopic Surgical Training, co-authored by Nicholas Stergiou, UNO faculty member.
Our culture is obsessed with design. Sometimes designers can fuse utility and fantasy to make the mundane appear fresh—a cosmetic repackaging of the same old thing. Because of this, medicine—grounded in the unforgiving realities of the scientific method and peer review, and of flesh, blood, and pain—can sometimes confuse “design” with mere “prettifying.” Design solves real problems, however. This collection of papers underwrites the importance of design for the MMVR community, within three different environments: in vivo, in vitro and in silico. in vivo: we design machines to explore our living bodies. Imaging devices, robots, and sensors move constantly inward, operating within smaller dimensions: system, organ, cell, DNA. in vitro: Using test tubes and Petri dishes, we isolate in vivo to better manipulate and measure biological conditions and reactions. in silico: We step out of the controlled in vitro environment and into a virtual reality. The silica mini-worlds of test tubes and Petri dishes are translated into mini-worlds contained within silicon chips. The future of medicine remains within all three environments: in vivo, in vitro, and in silico. Design is what makes these pieces fit together—the biological, the informational, the physical/material—into something new and more useful.https://digitalcommons.unomaha.edu/facultybooks/1235/thumbnail.jp
Reply
No full textWe thank Dr Spence for his interest in the 2020 International Society of Hypertension (ISH) Global Hypertension Practice Guidelines and highlighting what he considers blind spots in the new guidelines. Specifically, the author is concerned that Liddle syndrome, one of the rare monogenic causes of hypertension is not mentioned and its treatment not appropriately addressed in the 2020 ISH guidelines. Dr Spence provides insightful comments describing the central role of the epithelial sodium channel (ENaC) in Liddle syndrome which is responsible for its clinical features including early onset of salt-sensitive hypertension, hypokalemic metabolic alkalosis, and suppression of both renin and aldosterone secretion. Importantly, Liddle syndrome is associated with increased incidence
of premature cardiovascular and cerebrovascular events and usually unresponsive to mineralocorticoid receptor antagonists
\u3ci\u3eMedicine Meets Virtual Reality 16\u3c/i\u3e
No full textChapter, Validating Advanced Robot-Assisted Laparoscopic Training Task in Virtual Reality, co-authored by Nicholas Stergiou, UNO faculty member.
We humans are tribal, grouping ourselves by a multitude of criteria: physical, intellectual, political, emotional, etc. The Internet and its auxiliary technologies have enabled a novel dimension in tribal behavior during our recent past. This growing connectivity begs the question: will individuals and their communities come together to solve some very urgent global problems? At MMVR, we explore ways to harness information technology to solve healthcare problems – and in the industrialized nations we are making progress. In the developing world however, things are more challenging. Massive urban poverty fuels violence and misery. Will global networking bring a convergence of individual and tribal problem-solving? Recently, a barrel-shaped water carrier that rolls along the ground was presented, improving daily life for many people. Also the One Laptop per Child project is a good example of how the industrialized nations can help the developing countries. They produce durable and simple laptops which are inexpensive to produce. At MMVR, we focus on cutting-edge medical technology, which is generally pretty expensive. While the benefits of innovation trickle downward, from the privileged few to the broader masses, we should expand this trickle into a flood. Can breakthrough applications in stimulation, visualization, robotics, and informatics engender tools as ingeniously as the water carrier or laptop? With some extra creativity, we can design better healthcare for the developing world too.https://digitalcommons.unomaha.edu/facultybooks/1234/thumbnail.jp
- …
