Search Results - "SOMERS, Jeffrey T"

Investigation of the THOR Anthropomorphic Test Device for Predicting Occupant Injuries during Spacecraft Launch Aborts and Landing by Somers, Jeffrey T, Newby, Nathaniel, Lawrence, Charles, DeWeese, Richard, Moorcroft, David, Phelps, Shean

“…The objective of this study was to investigate new methods for predicting injury from expected spaceflight dynamic loads by leveraging a broader range of…”
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Development and Validation of an Active Muscle Simplified Finite Element Human Body Model in a Standing Posture by Lalwala, Mitesh, Devane, Karan S., Koya, Bharath, Vu, Linh Q., Dolick, Kevin, Yates, Keegan M., Newby, Nathaniel J., Somers, Jeffrey T., Gayzik, F. Scott, Stitzel, Joel D., Weaver, Ashley A.

“…Active muscles play an important role in postural stabilization, and muscle-induced joint stiffening can alter the kinematic response of the human body,…”
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Simulated Astronaut Kinematics and Injury Risk for Piloted Lunar Landings and Launches While Standing by Lalwala, Mitesh, Koya, Bharath, Devane, Karan S., Hsu, Fang-Chi, Yates, Keegan M., Newby, Nathaniel J., Somers, Jeffrey T., Gayzik, F. Scott, Stitzel, Joel D., Weaver, Ashley A.

“…During future lunar missions, astronauts may be required to pilot vehicles while standing, and the associated kinematic and injury response is not well…”
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Effects of Standing, Upright Seated, vs. Reclined Seated Postures on Astronaut Injury Biomechanics for Lunar Landings by Lalwala, Mitesh, Koya, Bharath, Devane, Karan S., Hsu, Fang-Chi, Yates, Keegan M., Newby, Nathaniel J., Somers, Jeffrey T., Gayzik, F. Scott, Stitzel, Joel D., Weaver, Ashley A.

“…Astronauts may pilot a future lunar lander in a standing or upright/reclined seated posture. This study compared kinematics and injury risk for the…”
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Effect of Active Muscles on Astronaut Kinematics and Injury Risk for Piloted Lunar Landing and Launch While Standing by Lalwala, Mitesh, Devane, Karan S., Koya, Bharath, Hsu, Fang-Chi, Yates, Keegan M., Newby, Nathaniel J., Somers, Jeffrey T., Gayzik, F. Scott, Stitzel, Joel D., Weaver, Ashley A.

“…While astronauts may pilot future lunar landers in a standing posture, the response of the human body under lunar launch and landing-related dynamic loading…”
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Modeling Human Volunteers in Multidirectional, Uni-axial Sled Tests Using a Finite Element Human Body Model by Gaewsky, James P., Jones, Derek A., Ye, Xin, Koya, Bharath, McNamara, Kyle P., Gayzik, F. Scott, Weaver, Ashley A., Putnam, Jacob B., Somers, Jeffrey T., Stitzel, Joel D.

“…A goal of the Human Research Program at National Aeronautics and Space Administration (NASA) is to analyze and mitigate the risk of occupant injury due to…”
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Lumbar Spine Response of Computational Finite Element Models in Multidirectional Spaceflight Landing Conditions by Ye, Xin, Jones, Derek A, Gaewsky, James P, Koya, Bharath, McNamara, Kyle P, Saffarzadeh, Mona, Putnam, Jacob B, Somers, Jeffrey T, Gayzik, F Scott, Stitzel, Joel D, Weaver, Ashley A

“…The goals of this study are to compare the lumbar spine response variance between the hybrid III, test device for human occupant restraint (THOR), and global…”
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Modeling and Simulation Credibility Assessments of Whole-Body Finite Element Computational Models for Use in NASA Extravehicular Activity Applications by Perkins, Richard A, Gallo, Christopher A, Ivanoff, Athena E, Yates, Keegan M, Schkurko, Courtney M, Somers, Jeffrey T, Newby, Nathaniel J, Jr, Jerry G Myers, Prabhu, Raj K

“…Computational finite element (FE) models are used in suited astronaut injury risk assessments; however, these models’ verification, validation, and credibility…”
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Pelvis injury risk curves in side impacts from human cadaver experiments using survival analysis and Brier score metrics by Yoganandan, Narayan, Humm, John R., DeVogel, Nicholas, Banerjee, Anjishnu, Pintar, Frank A., Somers, Jeffrey T.

“…Objectives: Post Mortem Human Surrogate (PMHS) experiments are used for describing tolerance and improve safety. For nearside impacts, the United States…”
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Development and evaluation of a finite element model of the THOR for occupant protection of spaceflight crewmembers by Putnam, Jacob B., Somers, Jeffrey T., Wells, Jessica A., Perry, Chris E., Untaroiu, Costin D.

“…New vehicles are currently being developed to transport humans to space. During the landing phases, crewmembers may be exposed to spinal and frontal loading…”
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Head injury metric response in finite element ATDs and a human body model in multidirectional loading regimes by Jones, Derek A., Gaewsky, James P., Somers, Jeffrey T., Gayzik, F. Scott, Weaver, Ashley A., Stitzel, Joel D.

“…Objective: The objective was to quantify head injury metric sensitivity of the 50th percentile male Hybrid III, THOR, and Global Human Body Models Consortium…”
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Development, Calibration, and Validation of a Head-Neck Complex of THOR Mod Kit Finite Element Model by Putnam, Jacob B., Somers, Jeffrey T., Untaroiu, Costin D.

“…Introduction/Objective: In an effort to continually improve upon the design of the test device for human occupant restraint (THOR) dummy, a series of…”
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Assessing biofidelity of the Test Device for Human Occupant Restraint (THOR) against historic human volunteer data by Newby, Nate, Somers, Jeffrey T, Caldwell, Erin E, Perry, Chris, Littell, Justin, Gernhardt, Michael

“…The National Aeronautics and Space Administration (NASA) is interested in characterizing the responses of THOR (test device for human occupant restraint)…”
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Development of head injury assessment reference values based on NASA injury modeling by Somers, Jeffrey T, Granderson, Bradley, Melvin, John W, Tabiei, Ala, Lawrence, Charles, Feiveson, Alan, Gernhardt, Michael, Ploutz-Snyder, Robert, Patalak, John

“…NASA is developing a new crewed vehicle and desires a lower risk of injury compared to automotive or commercial aviation. Through an agreement with the…”
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Sensorimotor coordination aftereffects of exposure to a virtual environment by Harm, Deborah L., Taylor, Laura C., Reschke, Millard F., Somers, Jeffrey T., Bloomberg, Jacob J.

“…Virtual reality environments (VRs) offer unique training opportunities, particularly for training astronauts and preadapting them to microgravity. The purpose…”
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A Form of Inherited Cerebellar Ataxia with Saccadic Intrusions, Increased Saccadic Speed, Sensory Neuropathy, and Myoclonus by SWARTZ, BARBARA E., BURMEISTER, MARGIT, SOMERS, JEFFREY T., ROTTACH, KLAUS G., BESPALOVA, IRINA N., LEIGH, R. JOHN

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Vestibular and non-vestibular contributions to eye movements that compensate for head rotations during viewing of near targets by HAN, Yanning H, KUMAR, Arun N, RESCHKE, Millard F, SOMERS, Jeffrey T, DELL'OSSO, Louis F, LEIGH, R. John

“…Geometry dictates that when subjects view a near target during head rotation the eyes must rotate more than the head. The relative contribution to this…”
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Conjugate Ocular Oscillations during Shifts of the Direction and Depth of Visual Fixation by Ramat, Stefano, Somers, Jeffrey T, Das, Vallabh E, Leigh, R. John

“…To characterize dynamic properties of combined saccade-vergence eye movements that occur as the point of visual fixation is shifted between objects lying in…”
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Studies of Eccentric Gaze Stability: Effects of Pitch Head Position on Horizontal Gaze-Holding in Patients with Cerebellar Disease by WILSON, ELIZABETH, SNG, KAREN, SOMERS, JEFFREY T., RESCHKE, MILLARD F., LEIGH, R.JOHN

“…: We studied the effects of change of head position in the pitch plane on the ability to hold horizontal eccentric gaze in five patients with cerebellar…”
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Effects of Retinal Image Slip on Modulation of Visual Vestibulo-Ocular Reflex During Near Viewing by HAN, YANNING H., KUMAR, ARUN N., SOMERS, JEFFREY T., RESCHKE, MILLARD F., LEIGH, R.JOHN

“…: During viewing of a near target, the gain of the visually modulated vestibul‐ocular reflex (vVOR) exceeds 1.0. We investigated whether retinal image slip…”
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