Search Results - "Swanson, D.K."

Three-dimensional finite element analysis of current density and temperature distributions during radio-frequency ablation by Panescu, D., Whayne, J.G., Fleischman, S.D., Mirotznik, M.S., Swanson, D.K., Webster, J.G.

“…This study analyzed the influence of electrode geometry, tissue-electrode angle, and blood flow on current density and temperature distribution, lesion size,…”
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Temporal and spatial variability in coastline response to declining sea-ice in northwest Alaska by Farquharson, L.M., Mann, D.H., Swanson, D.K., Jones, B.M., Buzard, R.M., Jordan, J.W.

“…Arctic sea-ice is declining in extent, leaving coastlines exposed to more storm-wave events. There is an urgent need to understand how these changes affect…”
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Cryogenesis and soil formation along a bioclimate gradient in Arctic North America by Ping, C.L, Michaelson, G.J, Kimble, J.M, Romanovsky, V.E, Shur, Y.L, Swanson, D.K, Walker, D.A

“…In arctic tundra, cryoturbation resulting from frost heave, cracking, and other cryogenic processes produces patterned ground such as nonsorted circles,…”
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Carbon Stores and Biogeochemical Properties of Soils under Black Spruce Forest, Alaska by Ping, C.L, Michaelson, G.J, Kane, E.S, Packee, E.C, Stiles, C.A, Swanson, D.K, Zaman, N.D

“…Fifty-two soils under black spruce [Picea mariana (Mill.) Britton et al.]-dominated forest communities were examined and assessed for their organic C (OC)…”
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Path-following control for dissipative passive haptic displays by Swanson, D.K., Book, W.J.

“…This paper addresses the problem of following an arbitrary path with a dissipative passive haptic display. Such a display has energetically passive actuators;…”
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Soil catena sequences and fire ecology in the boreal forest of Alaska by Ping, C.L, Michaelson, G.J, Packee, E.C, Stiles, C.A, Swanson, D.K, Yoshikawa, K

“…This paper is the first to provide chemical, physical, and morphological properties of the soils in the boreal region of Alaska and to demonstrate the dominant…”
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Effectiveness of Ecological Units for Stratification of Bird Habitat in Yukon-Charley Rivers National Preserve, Alaska by Swanson, David K., Swanson, Shelli A.

“…For a comprehensive bird inventory of Yukon-Charley Rivers National Preserve, Alaska, we stratified the 1 million hectare study area by large,…”
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Diapirism in soils due to thaw of ice-reach material near the permafrost table by SWANSON, D.K, PING, C.L, MICHAELSON, G.J

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Estimating the 95% effective defibrillation dose by Malkin, R.A., Burdick, D.S., Johnson, E.E., Pilkington, T.C., Swanson, D.K., Ideker, R.E.

“…Minimum-squared-error (MinSE) testing protocols and a MinSE estimator that accurately estimate the voltage that defibrillates 95% of the time (the ED95) are…”
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Vegetation indicators of organic soil properties in Minnesota by Swanson, D.K, Grigal, D.F

“…Vegetation is the main surface indicator for properties of organic soils. The presence of certain taxa of common vascular plants can be used to classify sites…”
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Obstacle avoidance methods for a passive haptic display by Swanson, D.K., Book, W.J.

“…An existing two degree-of-freedom passive haptic display is used to perform obstacle avoidance tasks. Two types of controllers are examined: one attempts to…”
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Torque feedback control of dry friction clutches for a dissipative passive haptic interface by Swanson, D.K., Books, W.J.

“…The control of a passive dissipative haptic interface using electromagnetic dry friction clutches as actuators is considered. The performance of the device is…”
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Coil electrodes for RF ablation of atrial fibrillation by Panescu, D., Fleischman, S.D., Whayne, J.G., Mirotznik, M.S., Swanson, D.K.

“…Long and contiguous lesions may cure AF. We analyzed a multielectrode steerable catheter capable of creating such lesions. For optimal temperature control…”
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Temperature distribution under cooled electrodes during radiofrequency catheter ablation by Panescu, D., Fleischman, S.D., Whayne, J.G., Swanson, D.K.

“…Larger lesions were created when the electrode of an RF ablation system was actively cooled below blood temperature. To keep the maximal tissue temperature at…”
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Contiguous lesions by radiofrequency multielectrode ablation by Panescu, D., Fleischman, S.D., Whayne, J.G., Swanson, D.K.

“…Radiofrequency catheter ablation can cure cases of atrial fibrillation. Multielectrode ablation catheters that can create long and contiguous lesions may…”
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Effects of temperature sensor placement on performance of temperature-controlled ablation [cardiac arrhythmias application] by Panescu, D., Fleischman, S.D., Whayne, J.G., Swanson, D.K.

“…The significant changes in power with tissue-electrode angle suggested that the lesions were more predictable when ablating with temperature-based RF…”
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The influence of different electrode geometries on the current density distribution during radio-frequency ablation. A three-dimensional finite element study by Panescu, D., Fleishman, S.D., Whayne, J.G., Swanson, D.K., Webster, J.G.

“…The locations of current density maxima can provide information about the locations of temperature maxima. Our goals were: (1) to find the optimal place of the…”
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In vitro study of lesion size dependence on electrode geometry during temperature-controlled radiofrequency ablation by Fleishman, S.D., Whayne, J.G., Panescu, D., Swanson, D.K.

“…We performed in vitro experiments to compare lesion sizes after ablating with five electrode geometries positioned at either 0/spl deg/ (flat) or 90/spl deg/…”
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A comparison of standard vs up/down methods for determining the deftbrillation probability curve by Hahn, S.J., Swanson, D.K., Heil, J.E., Lang, D.J.

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Susceptibility of permafrost soils to deep thaw after forest fires in interior Alaska, U.S.A., and some ecologic implications by Swanson, D.K. (Northern Michigan University, Marquette, MI.)

“…Some soils with permafrost thaw deeply and become drier after forest fires in interior Alaska, while others change little. Soils with permafrost on the coldest…”
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