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158 results on '"Mitchell, J.H."'

2. Optimization of a spherical mechanism for a minimally invasive surgical robot: theoretical and experimental approaches

Author

Lum, Mitchell J.H., Rosen, Jacob, Sinanan, Mika N., and Hannaford, Blake

Subjects
Robots -- Research, Biomedical engineering -- Research, Robot, Biological sciences, Business, Computers, Health care industry
Abstract

With a focus on design methodology for developing a compact and lightweight minimally invasive surgery (MIS) robot manipulator, the goal of this study is progress toward a next-generation surgical robot system that will help surgeons deliver healthcare more effectively. Based on an extensive database of in-vivo surgical measurements, the workspace requirements were clearly defined. The pivot point constraint in MIS makes the spherical manipulator a natural candidate. An experimental evaluation process helped to more clearly understand the application and limitations of the spherical mechanism as an MIS robot manipulator. The best configuration consists of two serial manipulators in order to avoid collision problems. A complete kinematic analysis and optimization incorporating the requirements for MIS was performed to find the optimal link lengths of the manipulator. The results show that for the serial spherical 2-1ink manipulator used to guide the surgical tool, the optimal link lengths (angles) are (60[degrees], 50[degrees]). A prototype 6-DOF surgical robot has been developed and will be the subject of further study. Index Terms--Isotropy, Jacobian, minimally invasive surgery, optimization, serial mechanism, spherical mechanism, surgical robot.

Published
2006

12. Search for quadrupole strength in the electroexcitation of the Δ+ (1232)

Author

Mertz, C. Vellidis, C.E. Alarcon, R. Barkhuff, D.H. Bernstein, A.M. Bertozzi, W. Burkert, V. Chen, J. Comfort, J.R. Dodson, G. Dow, K. Farkhondeh, M. Finn, J.M. Gilad, S. Gothe, R.W. Jiang, X. Joo, K. Kaloskamis, N.I. Karabarbounis, A. Kelly, J.J. Kowalski, S. Kunz, C. Lourie, R.W. McIntyre, J.I. Milbrath, B.D. Miskimen, R. Mitchell, J.H. Papanicolas, C.N. Perdrisat, C.F. Sarty, A.J. Shaw, J. Soong, S.-B. Tieger, D. Tschalær, C. Turchinetz, W. Ulmer, P.E. Van Verst, S. Warren, G.A. Weinstein, L.B. Williamson, S. Woo, R.J. Young, A.

Abstract

High-precision 1H(e, elp)φ0 measurements at Q2 = 0.126 (GeV/c)2 are presented. It allows the determination of quadrupole amplitudes in the γ*N → △ transition, in which the reliability of electroproduction models was simultaneously tested. The derived quadrupole-to-dipole (I = 3/2) amplitude ratios, RSM = (-6.5 ± 0.2stat+sys ± 2.5mod)% and REM = (-2.1 ± 0.2stat+sys ± 2.0mod)%, are dominated by model error.

Published
2001

13. Trinucleon cluster knockout from^{6}Li

Author

Berman, B.L., Blok, H.P., Briscoe, W.J., Connelly, J.P., Dhuga, K.S., Ent, R., Lapikas, L., Mitchell, J.H., Mokhtari, A., Zubanov, D., and Faculty of Science

Published
1998

21. Coherent π0 photoproduction on the deuteron up to 4 GeV

Author

Meekins, D.G., Meekins, D.G., Abbott, D.J., Ahmidouch, A., Armstrong, C.S., Arrington, J., Assamagan, K.A., Baker, O.K., Barrow, S.P., Beatty, D.P., Beck, D.H., Beedoe, S.Y., Beise, E.J., Belz, J.E., Bochna, C., Bosted, P.E., Brash, E.J., Breuer, H., Cadman, R.V., Cardman, L., Carlini, R.D., Cha, J., Chant, N.S., Collins, G., Cothran, C., Cummings, W.J., Danagoulian, S., Duncan, F.A., Dunne, J.A., Dutta, D., Eden, T., Ent, R., Filippone, B.W., Forest, T.A., Fortune, H.T., Frolov, V.V., Gao, H., Geesaman, D.F., Gilman, R., Gueye, P.L.J., Gustafsson, K.K., Hansen, J.-O., Harvey, M., Hinton, W., Holt, R.J., Jackson, H.E., Keppel, C.E., Khandaker, M.A., Kinney, E.R., Klein, A., Koltenuk, D.M., Kumbartzki, G., Lung, A.F., Mack, D.J., Madey, R., Markowitz, P., McFarlane, K.W., McKeown, R.D., Meziani, Z.-E., Miller, M.A., Mitchell, J.H., Mkrtchyan, H.G., Mohring, R.M., Napolitano, J., Nathan, A.M., Niculescu, G., Niculescu, I., O'Neill, T.G., Owen, B.R., Pate, S.F., Potterveld, D.H., Price, J.W., Rakness, G.L., Ransome, D., Reinhold, J., Rutt, P.M, Salgado, C.W., Savage, G., Segel, R.E., Simicevic, N., Stoler, P., Suleiman, R., Tang, L., Terburg, B.P., van Westrum, D., Vulcan, W.F., Williamson, S.E., Witkowski, M.T., Wood, S.A., Yan, C., Zeidman, B., Meekins, D.G., Meekins, D.G., Abbott, D.J., Ahmidouch, A., Armstrong, C.S., Arrington, J., Assamagan, K.A., Baker, O.K., Barrow, S.P., Beatty, D.P., Beck, D.H., Beedoe, S.Y., Beise, E.J., Belz, J.E., Bochna, C., Bosted, P.E., Brash, E.J., Breuer, H., Cadman, R.V., Cardman, L., Carlini, R.D., Cha, J., Chant, N.S., Collins, G., Cothran, C., Cummings, W.J., Danagoulian, S., Duncan, F.A., Dunne, J.A., Dutta, D., Eden, T., Ent, R., Filippone, B.W., Forest, T.A., Fortune, H.T., Frolov, V.V., Gao, H., Geesaman, D.F., Gilman, R., Gueye, P.L.J., Gustafsson, K.K., Hansen, J.-O., Harvey, M., Hinton, W., Holt, R.J., Jackson, H.E., Keppel, C.E., Khandaker, M.A., Kinney, E.R., Klein, A., Koltenuk, D.M., Kumbartzki, G., Lung, A.F., Mack, D.J., Madey, R., Markowitz, P., McFarlane, K.W., McKeown, R.D., Meziani, Z.-E., Miller, M.A., Mitchell, J.H., Mkrtchyan, H.G., Mohring, R.M., Napolitano, J., Nathan, A.M., Niculescu, G., Niculescu, I., O'Neill, T.G., Owen, B.R., Pate, S.F., Potterveld, D.H., Price, J.W., Rakness, G.L., Ransome, D., Reinhold, J., Rutt, P.M, Salgado, C.W., Savage, G., Segel, R.E., Simicevic, N., Stoler, P., Suleiman, R., Tang, L., Terburg, B.P., van Westrum, D., Vulcan, W.F., Williamson, S.E., Witkowski, M.T., Wood, S.A., Yan, C., and Zeidman, B.

Abstract

The differential cross section for 2H(γ,d)π0 has been measured at deuteron center-of-mass angles of 90° and 136°. This work reports the first data for this reaction above a photon energy of 1 GeV, and permits a test of the apparent constituent counting rule and reduced nuclear amplitude behavior as observed in elastic ed scattering. Measurements were performed up to a photon energy of 4.0 GeV, and are in good agreement with previous lower energy measurements. Overall, the data are inconsistent with both constituent-counting rule and reduced nuclear amplitude predictions.

Published
1999

22. Measurements of Deuteron Photodisintegration up to 4.0 GeV

Author

Bochna, C., Bochna, C., Terburg, B.P., Abbott, D.J., Ahmidouch, A., Armstrong, C.S., Arrington, J., Assamagan, K.A., Baker, O.K., Barrow, S.P., Beatty, D.P., Beck, D.H., Beedoe, S.Y., Beise, E.J., Belz, J.E., Bosted, P.E., Brash, E.J., Breuer, H., Cadman, R.V., Cardman, L., Carlini, R.D., Cha, J., Chant, N.S., Collins, G., Cothran, C., Cummings, W.J., Danagoulian, S., Duncan, F.A., Dunne, J.A., Dutta, D., Eden, T., Ent, R., Filippone, B.W., Forest, T.A., Fortune, H.T., Frolov, V.V., Gao, H., Geesaman, D.F., Gilman, R., Gueye, P.L.J., Gustafsson, K.K., Hansen, J.-O., Harvey, M., Hinton, W., Holt, R.J., Jackson, H.E., Keppel, C.E., Khandaker, M.A., Kinney, E.R., Klein, A., Koltenuk, D.M., Kumbartzki, G., Lung, A.F., Mack, D.J., Madey, R., Markwoitz, P., McFarlane, K.W., McKeown, R.D., Meekins, D.G., Meziani, Z.-E., Miller, M.A., Mitchell, J.H., Mkrtchyan, H.G., Mohring, R.M., Napolitano, J., Nathan, A.M., Niculescu, G., Niculescu, I., O'Neill, T.G., Owen, B.R., Pate, S.F., Potterveld, D.H., Price, J.W., Rakness, G.L., Ransome, R., Reinhold, J., Rutt, P.M., Salgado, C.W., Savage, G., Segel, R., Simicevic, N., Stoler, P., Suleiman, R., Tang, L., van Westrum, D., Vulcan, W.F., Williamson, S., Witkowski, M.T., Wood, S.A., Yan, C., Zeidman, B., Bochna, C., Bochna, C., Terburg, B.P., Abbott, D.J., Ahmidouch, A., Armstrong, C.S., Arrington, J., Assamagan, K.A., Baker, O.K., Barrow, S.P., Beatty, D.P., Beck, D.H., Beedoe, S.Y., Beise, E.J., Belz, J.E., Bosted, P.E., Brash, E.J., Breuer, H., Cadman, R.V., Cardman, L., Carlini, R.D., Cha, J., Chant, N.S., Collins, G., Cothran, C., Cummings, W.J., Danagoulian, S., Duncan, F.A., Dunne, J.A., Dutta, D., Eden, T., Ent, R., Filippone, B.W., Forest, T.A., Fortune, H.T., Frolov, V.V., Gao, H., Geesaman, D.F., Gilman, R., Gueye, P.L.J., Gustafsson, K.K., Hansen, J.-O., Harvey, M., Hinton, W., Holt, R.J., Jackson, H.E., Keppel, C.E., Khandaker, M.A., Kinney, E.R., Klein, A., Koltenuk, D.M., Kumbartzki, G., Lung, A.F., Mack, D.J., Madey, R., Markwoitz, P., McFarlane, K.W., McKeown, R.D., Meekins, D.G., Meziani, Z.-E., Miller, M.A., Mitchell, J.H., Mkrtchyan, H.G., Mohring, R.M., Napolitano, J., Nathan, A.M., Niculescu, G., Niculescu, I., O'Neill, T.G., Owen, B.R., Pate, S.F., Potterveld, D.H., Price, J.W., Rakness, G.L., Ransome, R., Reinhold, J., Rutt, P.M., Salgado, C.W., Savage, G., Segel, R., Simicevic, N., Stoler, P., Suleiman, R., Tang, L., van Westrum, D., Vulcan, W.F., Williamson, S., Witkowski, M.T., Wood, S.A., Yan, C., and Zeidman, B.

Abstract

The first measurements of the differential cross section for the d(γ,p)n reaction up to 4.0 GeV were performed at the Continuous Electron Beam Accelerator Facility (CEBAF) at Thomas Jefferson Laboratory. We report the cross sections at the proton center-of-mass angles of 36°, 52°, 69°, and 89°. These results are in reasonable agreement with previous measurements at lower energy. The 89° and 69° data show constituent-counting-rule behavior up to 4.0 GeV photon energy. The 52° and 36° data disagree with the counting-rule behavior. The quantum chromodynamics (QCD) model of nuclear reactions involving reduced amplitudes disagrees with the present data.

Published
1998

30. The 12C(e, e′p) and 12C(e, e′pp) reactions in the Δ-resonance region

Author

Zondervan, A., primary, de Bever, L.J., additional, Jans, E., additional, Konijn, J., additional, Kruijer, M., additional, Steijger, J.J.M., additional, Visschers, J.L., additional, Countryman, P.J., additional, Hesselink, W.H.A., additional, Kalantar-Nayestanaki, N., additional, Kester, L.J.H.M., additional, Mitchell, J.H., additional, Pellegrino, A., additional, Calarco, J.R., additional, Hersman, F.W., additional, Leuschner, M., additional, Smith, T.P., additional, Bauer, Th.S., additional, Kelder, M.W., additional, Giusti, C., additional, Pacati, F.D., additional, Ryckebusch, J., additional, and Vanderhaeghen, M., additional

Published
1995
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31. Two-nucleon knock-out investigated with the semi-exclusive 12C(e, e′p) reaction

Author

Kester, L.J.H.M., primary, Hesselink, W.H.A., additional, Kalantar-Nayestanaki, N., additional, Mitchell, J.H., additional, Pellegrino, A., additional, Jans, E., additional, Konijn, J., additional, Steijger, J.J.M., additional, Visschers, J.L., additional, Zondervan, A., additional, Calarco, J.R., additional, DeAngelis, D., additional, Hersman, F.W., additional, Kim, W., additional, Bauer, Th.S., additional, Kelder, M.W., additional, Papandreou, Z., additional, Ryckebusch, J., additional, Ciofi degli Atti, C., additional, and Simula, S., additional

Published
1995
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33. A large-acceptance proton scintillator detection system for electron scattering experiments

Author

Zondervan, A., primary, Bauer, Th.S., additional, Boontje, R., additional, van den Born, E.A., additional, Calarco, J.R., additional, Countryman, P.J., additional, Hesselink, W.H.A., additional, Jans, E., additional, Kalantar-Nayestanaki, N., additional, Kester, L.J.H.M., additional, Kok, E., additional, Konijn, J., additional, Kruszynska, M.N., additional, Kwakkel, E., additional, de Leo, R., additional, Mitchell, J.H., additional, Mul, F.A., additional, Nooren, G.J.L., additional, Pellegrino, A., additional, Steijger, J.J.M., additional, Visschers, J.L., additional, van Wijk, R.F., additional, and Zwart, A.N.M., additional

Published
1994
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37. CORRESPONDENCE.

Author

Haddock, D.R.W., Shedden, W.I.H., Diffey, B.L., Hindson, T.C., Snaith, M.L., Fenton, D.A., Dawes, P.T., Duthie, R.B., Pickering, A.H., Glashan, R.W., Davies, Joan M., Connolly, C.K., Parsons, Luise, Mahaffey, P.J., Hopkinson, G.B., Dickson, R.J., Mitchell, J.H., and Eade, O.E.

Subjects
MEDICINE, BLADDER cancer, PANCREATITIS
Abstract

Presents several letters related to medicine as of May 1982. Side effects of benoxaprofen; Treatment of industrial bladder cancer; Complication of acute pancreatitis.

Published
1982

38. CORRESPONDENCE.

Author

Fendall, N.R.E., Waterston, A.J.R., Crawford, J.W., Chamberlain, D.A., Drury, V.W.M., Greenburg, Gillian, Mitchell, J.H., Yunus, M., Bennett, J.R., Dodger, J.A., Fox, K.M., Duke, R.F.N., Taylor, W.O.G., Bradshaw, J.S., Klopper, A.I., Hudson, M.W.P., and Easton, H.G.

Subjects
MEDICINE, PHYSICIANS, LAPAROSCOPY complications, HORMONES, PREGNANT women, HEALTH, PHYSIOLOGY
Abstract

Presents several correspondence on medical issues in Great Britain. Emigration of doctors; Complications of Laparoscopy; Teratogenic effects of hormones in pregnant women.

Published
1975

41. Objective Assessment of Telesurgical Robot Systems: Telerobotic FLS.

Author

Westwood, James D., Haluck, Randy S., Hoffman, Helene M., Mogel, Greg T., Phillips, Roger, Robb, Richard A., Vosburgh, Kirby G., Lum, Mitchell J.H., Friedman, Diana C.W., Sankaranarayanan, Ganesh, King, Hawkeye, Wright, Andrew, Sinanan, Mika, Lendvay, Thomas, Rosen, Jacob, and Hannaford, Blake

Abstract

The Society of American Gastrointestinal Endoscopic Surgeons (SAGES) Fundamentals of Laparoscopic Surgery (FLS) program contains curriculum that includes both a cognative and psychomotor skills. In this research the use of FLS Block Transfer task is used to evaluate the performance of surgeons' teleoperating the University of Washington Surgical robot. The use of the FLS Trainer Box and accessories kit provides a well-defined series of tasks that can be repeated by any researchers working in the field of surgical robotics so that systems can be evaluated using a common method. [ABSTRACT FROM AUTHOR]

Published
2008

42. Telesurgery Via Unmanned Aerial Vehicle (UAV) with a Field Deployable Surgical Robot.

Author

Westwood, James D., Haluck, Randy S., Hoffman, Helene M., Mogel, Greg T., Phillips, Roger, Robb, Richard A., Vosburgh, Kirby G., Lum, Mitchell J.H., Rosen, Jacob, King, Hawkeye, Friedman, Diana C.W., Donlin, Gina, Sankaranarayanan, Ganesh, Harnett, Brett, Huffman, Lynn, Doarn, Charles, Broderick, Timothy, and Hannaford, Blake

Abstract

Robotically assisted surgery stands to further revolutionize the medical field and provide patients with more effective healthcare. Most robotically assisted surgeries are teleoperated from the surgeon console to the patient where both ends of the system are located in the operating room. The challenge of surgical teleoperation across a long distance was already demonstrated through a wired communication network in 2001. New development has shifted towards deploying a surgical robot system in mobile settings and/or extreme environments such as the battlefield or natural disaster areas with surgeons operating wirelessly. As a collaborator in the HAPs/MRT (High Altitude Platform/Mobile Robotic Telesurgery) project, The University of Washington surgical robot was deployed in the desert of Simi Valley, CA for telesurgery experiments on an inanimate model via wireless communication through an Unmanned Aerial Vehicle (UAV). The surgical tasks were performed telerobotically with a maximum time delay between the surgeon's console (master) and the surgical robot (slave) of 20 ms for the robotic control signals and 200 ms for the video stream. This was our first experiment in the area of Mobile Robotic Telesurgery (MRT). The creation and initial testing of a deployable surgical robot system will facilitate growth in this area eventually leading to future systems saving human lives in disaster areas, on the battlefield or in other remote environments. [ABSTRACT FROM AUTHOR]

Published
2007

43. A year in the life of a river.

Author

Mitchell, J.H.

Subjects
NATURE photography
Abstract

An extraordinary collection of photographs documents the primordial beauty of Beaver Brook, an undiscovered haven for wildlife in all seasons, and for the author, a timeless refuge. A voyage through the seasons.

Published
1988

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