Search Results - "Karlen, W."

Photoplethysmogram signal quality estimation using repeated Gaussian filters and cross-correlation by Karlen, W, Kobayashi, K, Ansermino, J M, Dumont, G A

“…Pulse oximeters are monitors that noninvasively measure heart rate and blood oxygen saturation (SpO2). Unfortunately, pulse oximetry is prone to artifacts…”
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Sleep and Wake Classification With ECG and Respiratory Effort Signals by Karlen, W., Mattiussi, C., Floreano, D.

“…We describe a method for the online classification of sleep/wake states based on cardiorespiratory signals produced by wearable sensors. The method was…”
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Usability testing of a prototype Phone Oximeter with healthcare providers in high‐ and low‐medical resource environments by Hudson, J., Nguku, S. M., Sleiman, J., Karlen, W., Dumont, G. A., Petersen, C. L., Warriner, C. B., Ansermino, J. M.

“…Summary To increase the use of pulse oximetry by capitalise on the wide availability of mobile phones, we have designed, developed and evaluated a prototype…”
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Diatom oxygen isotopes in pro-glacial lake sediments from northern Sweden: a 5000 year record of atmospheric circulation by Rosqvist, G., Jonsson, C., Yam, R., Karlén, W., Shemesh, A.

“…We use a pro-glacial oxygen isotope record of diatom silica (δ 18O diatom) and a sedimentary proxy for glacier fluctuations to determine centennial–millennial…”
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A 7400-year tree-ring chronology in northern Swedish Lapland: natural climatic variability expressed on annual to millennial timescales by Grudd, Håkan, Briffa, Keith R., Karlén, Wibjorn, Bartholin, Thomas S., Jones, Philip D., Kromer, Bernd

“…Tree-ring widths from 880 living, dry dead, and subfossil northern Swedish pines (Pinus syl vestris L.) have been assembled into a continuous and precisely…”
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Pulse oximeter plethysmograph variation and its relationship to the arterial waveform in mechanically ventilated children by Chandler, J. R., Cooke, E., Petersen, C., Karlen, W., Froese, N., Lim, J., Ansermino, J. M.

“…The variations induced by mechanical ventilation in the arterial pulse pressure and pulse oximeter plethysmograph waveforms have been shown to correlate…”
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A 3000-year high-resolution stalagmite-based record of palaeoclimate for northeastern South Africa by HOLMGREN, K, KARLEN, W, LAURITZEN, S. E, LEE-THORP, J. A, PARTRIDGE, T. C, PIKETH, S, REPINSKI, P, STEVENSON, C, SVANERED, O, TYSON, P. D

“…High-resolution stable isotope variations and growth structure analyses of the last three millennia of a 6600-year stalagmite record at Cold Air Cave,…”
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Fennoscandian summers from AD 500 : temperature changes on short and long timescales by BRIFFA, K. R, JONES, P. D, BARTHOLIN, T. S, ECKSTEIN, D, SCHWEINGRUBER, F. H, KARLEN, W, ZETTERBERG, P, ERONEN, M

“…Quantitative estimates of 1480 years of summer temperatures in northern Fennoscandia have previously been derived from continuous treering records from…”
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Where do pulse oximeter probes break? by Crede, S., Van der Merwe, G., Hutchinson, J., Woods, D., Karlen, W., Lawn, J.

“…Pulse oximetry, a non-invasive method for accurate assessment of blood oxygen saturation (SPO2), is an important monitoring tool in health care facilities…”
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A 1,400-year tree-ring record of summer temperatures in Fennoscandia by Briffa, K. R, Bartholin, T. S, Eckstein, D, Jones, P. D, Karlén, W, Schweingruber, F. H, Zetterberg, P

“…Maximum latewood density and raw mean ring width data have been determined for living and remnant Scots pines in Sweden, dating back to AD 443. Qualitative…”
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The Modified Dunn Procedure for Unstable Slipped Capital Femoral Epiphysis: A Multicenter Perspective by Sankar, Wudbhav N, Vanderhave, Kelly L, Matheney, Travis, Herrera-Soto, José A, Karlen, Judson W

“…BACKGROUND:The modified Dunn procedure has rapidly gained popularity as a treatment for unstable slipped capital femoral epiphysis (SCFE), but limited data…”
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A 2000-year context for modern climate change by Maasch, K.A., Mayewski, P.A., Rohling, E.J., Stager, J.C., Karlen, W., Meeker, L.D., Meyerson, E.A.

“…Although considerable attention has been paid to the record of temperature change over the last few centuries, the range and rate of change of atmospheric…”
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Characterizing Negative Online Reviews of Pediatric Orthopaedic Surgeons by Richman, Evan H., Ogbaudu, Ewoma, Pollock, Jordan R., Brinkman, Joseph C., Moore, Michael Lane, Arthur, Jaymeson R., Karlen, Judson W.

“…The growing focus on subjective patient experiences has created an increase in popularity for physician rating websites. The purpose of this study was to…”
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Clinical outcome in total hip arthroplasty using a cemented titanium femoral prosthesis by Jergesen, Harry E., Karlen, Judson W.

“…Between 1988 and 1993, 118 total hip arthroplasties were carried out using cemented titanium alloy stems with modular cobalt-chrome heads. At a mean follow-up…”
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Motion laboratory gait analysis and orthopedic resident education: preliminary results by Malone, Jason B., Burns, Jessica D., Belthur, Mohan V., Karlen, Judson W.

“…Gait analysis in the pediatric and adult orthopedic patient populations can adjunct the diagnosis and treatment of a multitude of musculoskeletal conditions…”
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A 3000-Year Climatic Record from Biogenic Silica Oxygen Isotopes in an Equatorial High-Altitude Lake by Rietti-Shati, M., Shemesh, A., Karlen, W.

“…A record of oxygen isotopes in biogenic opal, 4200 to 1200 calibrated years before the present, from a high-altitude proglacial lake on Mount Kenya, East…”
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Holocene climatic change in Swedish Lapland inferred from an oxygen-isotope record of lacustrine biogenic silica by Shemesh, Aldo, Rosqvist, Gunhild, Rietti-Shati, Miri, Rubensdotter, Lena, Bigler, Christian, Yam, Ruth, Karlén, Wibjörn

“…Holocene climatic variability was studied in a 9500-year lake-sediment sequence from the Abisko region in Swedish Lapland, using the oxygen-isotope ratio in…”
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Comments on Leif Kullman's Paper "Early Holocene Tree Growth at a High Elevation Site..." by Karlen, W.

“…Abstract only…”
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Climate variations and the enhanced greenhouse effect by Karlen, W. (Stockholm Univ. (Sweden). Naturgeografiska Inst.)

“…Changes in the size of glaciers, in the altitude of the alpine tree-limit, and variation in the width of tree-rings during the Holocene clearly indicate that…”
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LONG-TERM SOLAR FORCING OF THE HOLOCENE CLIMATE by Karlén, W.

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