Tim Broderick

University of Cincinnati

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Darlington Munyikwa

National Blood Service Zimbabwe

Michel Zondo

University of the Witwatersrand

Craig McKinley

University of Central Oklahoma

Jonah N. Choiniere

University of the Witwatersrand

Kimberley E. J. Chapelle

University of the Witwatersrand

Pia A. Viglietti

University of the Witwatersrand

Mehran Anvari

St. Joseph’s Healthcare Hamilton

Paul M. Barrett

Natural History Museum

Daniel W. Birch

University of Alberta

Charles H. Goldsmith

McMaster University

Cooperative Institutions

National Centre for Atmospheric Science

McMaster University

Royal Holloway University of London

University of Manchester

University of Cambridge

University of Cincinnati

University of Leeds

University of York

Environmental Earth Sciences

St. Joseph’s Healthcare Hamilton

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An historical account of the mining of Muscovite Mica in Zimbabwe

Rhodesiana (2013)

Tim Broderick

Muscovite

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Extraterrestrial hemorrhage control: Terrestrial developments in technique, technology, and philosophy with applicability to traumatic hemorrhage control in long-duration spaceflight

Journal of the American College of Surgeons (2005)

Andrew W. Kirkpatrick Mark Campbell Jeff Jones Tim Broderick Chad G. Ball

Spaceflight

10.1016/j.jamcollsurg.2004.08.028

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Citations (39)

A Consensus Document on Robotic Surgery: Prepared by the SAGES-MIRA Robotic Surgery Consensus Group

Daniel M. Herron Arnold P. Advincula Sandeep Aggarwal Tim Broderick Ivo A. M. J. Broeders

The SAGES-MIRA Robotic Surgery Consensus Group Arnold Advincula MD, University of Michigan Medical Center, Ann Arbor, MI, USA Sandeep Aggarwal MD, Mount Sinai School of Medicine, New York, NY USA Tim Broderick MD, University of Cincinnati College of Medicine, Cincinnati, OH USA Ivo Broeders MD, University Medical Centre Utrecht, Heidelberglaan, Netherlands Arnold Byer MD, Hackensack University Medical Center, Wyckoff, NJ, USA Myriam Curet MD, Standford Medical Center, Stanford, CA, USA David Earle MD, Baystate Medical Center, Springfield, MA, USA Piero Giulianotti MD, Misericordia Hospital, Grossero, Italy Warren Grundfest MD, University of California Los Angeles, Los Angeles, CA, USA Makoto Hashizume MD, Kyushu University, Fukuoka, Japan William Kelley MD, Henrice Doctors Hospital, Richmond, VA, USA David Lee MD; Presbyterian Medical Center, Philadelphia, PA, USA Elspeth McDougall MD, University of California Irvine Medical Center, Orange, CA, USA John Meehan MD, University of Iowa Hospital, Iowa City, IA, USA Scott Melvin MD, Ohio State Unviversity Hospital, Columbus, OH, USA Mani Menon MD; Henry Ford Hospital, Detroit, MI, USA Dmitry Oleynikov MD, Nebraska Medical Center, Omaha, NE, USA Michael Palese MD, Mount Sinai School of Medicine, New York, NY, USA Vapul Patel MD, Ohio State Unviversity Medical Center, Columbus, OH, USA Rick Satava MD, University of Washington Medical Center, Seattle, WA, USA Steven Schwaitzberg MD, Cambridge Health Alliance, Cambridge, MA, USA Gregory Weinstein MD, Presbyterian Medical Center, Philadelphia, PA, USA

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Isotopic signatures of methane emissions from tropical fires, agriculture and wetlands: the MOYA and ZWAMPS flights

Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences (2021)

E. G. Nisbet Grant Allen Rebecca E. Fisher James L. France James Lee

We report methane isotopologue data from aircraft and ground measurements in Africa and South America. Aircraft campaigns sampled strong methane fluxes over tropical papyrus wetlands in the Nile, Congo and Zambezi basins, herbaceous wetlands in Bolivian southern Amazonia, and over fires in African woodland, cropland and savannah grassland. Measured methane δ13CCH4 isotopic signatures were in the range -55 to -49‰ for emissions from equatorial Nile wetlands and agricultural areas, but widely -60 ± 1‰ from Upper Congo and Zambezi wetlands. Very similar δ13CCH4 signatures were measured over the Amazonian wetlands of NE Bolivia (around -59‰) and the overall δ13CCH4 signature from outer tropical wetlands in the southern Upper Congo and Upper Amazon drainage plotted together was -59 ± 2‰. These results were more negative than expected. For African cattle, δ13CCH4 values were around -60 to -50‰. Isotopic ratios in methane emitted by tropical fires depended on the C3 : C4 ratio of the biomass fuel. In smoke from tropical C3 dry forest fires in Senegal, δ13CCH4 values were around -28‰. By contrast, African C4 tropical grass fire δ13CCH4 values were -16 to -12‰. Methane from urban landfills in Zambia and Zimbabwe, which have frequent waste fires, had δ13CCH4 around -37 to -36‰. These new isotopic values help improve isotopic constraints on global methane budget models because atmospheric δ13CCH4 values predicted by global atmospheric models are highly sensitive to the δ13CCH4 isotopic signatures applied to tropical wetland emissions. Field and aircraft campaigns also observed widespread regional smoke pollution over Africa, in both the wet and dry seasons, and large urban pollution plumes. The work highlights the need to understand tropical greenhouse gas emissions in order to meet the goals of the UNFCCC Paris Agreement, and to help reduce air pollution over wide regions of Africa. This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 2)'.

Tropical savanna climate

Isotopic signature

Dry season

10.1098/rsta.2021.0112

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Landscape evolution in Zimbabwe from the Permian to present, with implications for kimberlite prospecting

South African Journal of Geology (2009)

Andy Moore F.P.D. Cotterill Tim Broderick D. Plowes

Research Article| March 01, 2009 Landscape evolution in Zimbabwe from the Permian to present, with implications for kimberlite prospecting A.E. Moore; A.E. Moore Department of Geology, Rhodes University, Grahamstown., Somabula Explorations (Pvt.) Limited, Box CH399, Chisipite, Harare, Zimbabwe. e-mail: andy.moore@info.bw Search for other works by this author on: GSW Google Scholar F.P.D. (Woody) Cotterill; F.P.D. (Woody) Cotterill AEON - Africa Earth Observatory Network and Department of Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa., e-mail: fenton.cotterill@uct.ac.za Search for other works by this author on: GSW Google Scholar T. Broderick; T. Broderick 19 Jenkinson Road, Chisipite, Harare, Zimbabwe, e-mail: makari@zol.co.zw Search for other works by this author on: GSW Google Scholar D. Plowes D. Plowes 49 Arcadia Road, Tigers Kloof, Mutare, Zimbabwe., e-mail: plowes@mweb.co.zw Search for other works by this author on: GSW Google Scholar Author and Article Information A.E. Moore Department of Geology, Rhodes University, Grahamstown., Somabula Explorations (Pvt.) Limited, Box CH399, Chisipite, Harare, Zimbabwe. e-mail: andy.moore@info.bw F.P.D. (Woody) Cotterill AEON - Africa Earth Observatory Network and Department of Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa., e-mail: fenton.cotterill@uct.ac.za T. Broderick 19 Jenkinson Road, Chisipite, Harare, Zimbabwe, e-mail: makari@zol.co.zw D. Plowes 49 Arcadia Road, Tigers Kloof, Mutare, Zimbabwe., e-mail: plowes@mweb.co.zw Publisher: Geological Society of South Africa First Online: 09 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2009 Geological Society of South Africa South African Journal of Geology (2009) 112 (1): 65–88. https://doi.org/10.2113/gssajg.112.1.65 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A.E. Moore, F.P.D. (Woody) Cotterill, T. Broderick, D. Plowes; Landscape evolution in Zimbabwe from the Permian to present, with implications for kimberlite prospecting. South African Journal of Geology 2009;; 112 (1): 65–88. doi: https://doi.org/10.2113/gssajg.112.1.65 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySouth African Journal of Geology Search Advanced Search Abstract Evidence is presented to model drainage evolution across Zimbabwe since the Permian. This provides the framework to understand the marked difference in character of the rivers to the north and south of the modern central Zimbabwe watershed, which separates the Zambezi and Limpopo drainage basins. North-flowing tributaries of the Zambezi rising off this river divide have low gradients and senile characteristics. The northwest orientation of the upper sections of many of these rivers is unusual for tributaries of a major east-flowing drainage, but is in accord with the west-orientated fluvial system that deposited the Triassic sediments of the Karoo Supergroup in the Cabora Bassa basin of the Zambezi Valley. The modern drainage system to the north of the central Zimbabwe watershed is thus largely controlled by a surface that has existed since pre-Karoo times. Headwaters of the Zambezi tributaries were originally located well to the south of the modern divide, with high ground extending to the present-day Chimanimani and Nyanga mountainland in eastern Zimbabwe. This drainage system persisted until the late Triassic, when rifting, linked to the early disruption of Gondwana, initiated the formation of the modern Save and Zambezi river systems. The central Zimbabwe watershed represents a late Palaeogene (~43 to 33 Ma) asymmetric epeirogenic flexure, part of the Ovamboland-Kalahari-Zimbabwe Axis, which beheaded the headwaters of the early Zambezi tributaries. The resultant steeper gradients to the south of the watershed initiated the modern youthful south-flowing drainage system. A further disruption to the Zambezi drainage system occurred during Plio-Pleistocene arid episodes, when major dunes developed across dry river systems such as the Shangani, in the northwest of the country. Renewed flow in these rivers during subsequent wetter pluvial episodes resulted in them exploiting the inter-dune streets to develop new courses. Some, like the Shangani, incised their courses through the Kalahari sand cover to become superimposed drainages.The landscape of much of Zimbabwe reflects the imprint of two major cycles of erosion (African and post-African) since the disruption of Gondwana. The African erosion cycle commenced with the disruption of Gondwana, while the ensuing post-African cycle of erosion was initiated by the late Palaeogene uplift along the line of the modern central watershed. This rejuvenated the river network, leading to removal of the carapace of deeply weathered saprolite that developed under the humid mid-Cretaceous climate of the earlier African cycle. The post-African surface is thus an etch surface, with the characteristic plain and inselberg topography marking the weathering base of the African erosion event. A very subordinate Plio-Pleistocene cycle is reflected by terraces immediately marginal to the major river systems. The confinement of the Save and Zambezi drainages to graben structures resulted in their evolution largely independently of the two major erosion cycles that moulded the landscape of the rest of the country.The palaeo-drainage reconstruction has important implications for the dispersion of diamonds and associated pathfinder minerals from primary kimberlite sources. The Sese-Murowa kimberlites are inferred to be the primary source of hitherto unexplained alluvial diamonds in basal gravels of the Somabula Karoo outlier, located on the central Zimbabwe watershed, some 120 km to the northwest. The drainage evolution model also provides a framework to infer likely distal kimberlite sources for a number of major unexplained kimberlitic pathfinder mineral anomalies associated with the southern margin of the Kalahari Formation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Arcadia

Geological survey

10.2113/gssajg.112.1.65

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Citations (45)

The impact of latency on surgical precision and task completion during robotic-assisted remote telepresence surgery

Computer Aided Surgery (2005)

Mehran Anvari Tim Broderick Harvey Stein Trevor Chapman M. Ghodoussi

Objective: It has been suggested that robotic-assisted remote telepresence surgery with a signal transmission latency of greater than 300 ms may not be possible. Methods: We evaluated the impact of four different latencies of up to 500 ms on task completion and error rate in five surgeons after completion of three different surgical tasks. Results: The surgeons were able to complete all tasks with a latency of 500 ms. However, higher latency was associated with higher error rates and task completion time (TCT). There were significant variations between surgeons and different tasks. Conclusion: Surgeons are able to complete tasks with a signal transmission latency of up to 500 ms. The clinical impact of slower TCT and increased error rates encountered at higher latency needs to be established.

10.1080/10929080500228654

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Citations (46)

The impact of latency on surgical precision and task completion during robotic-assisted remote telepresence surgery

Computer Aided Surgery (2005)

Mehran Anvari Tim Broderick Harvey Stein Trevor Chapman M. Ghodoussi

10.3109/10929080500228654

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Citations (102)

Use of a Portable Telesurgical Robot in an Extreme Environment???The NEEMO 7 and 9 Missions

Surgical Laparoscopy Endoscopy & Percutaneous Techniques (2006)

Mehran Anvari D. Williams Richard Thirsk L. Morin Craig McKinley

Anvari, M.; Williams, D.; Thirsk, R.; Morin, L.; McKinley, C.; Broderick, T.; Kapoor, A.; Sebajang, H.; Hall, G.; Adili, A.; Dobranowski, J. Author Information

Extreme environment

10.1097/00129689-200608000-00028

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Citations (2)

Stratigraphy of the Vulcanodon type locality and its implications for regional correlations within the Karoo Supergroup

Journal of African Earth Sciences (2017)

Pia A. Viglietti Paul M. Barrett Tim Broderick Darlington Munyikwa Rowan MacNiven

Type locality

Supergroup

10.1016/j.jafrearsci.2017.10.015

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Citations (13)

Upper Karoo vertebrate assemblages (Late Triassic/Early Jurassic) of the Late Kariba region, Zimbabwe

Paul M. Barrett Tim Broderick Kimberley E. J. Chapelle Jonah N. Choiniere Steve Edwards

Southern Africa provides critical information on Late Triassic–Early Jurassic terrestrial tetrapod faunas. Most of the localities in this region are in South Africa and Lesotho, but preliminary work in Zimbabwe has revealed significant potential. Early Jurassic Zimbabwean localities have yielded the basal sauropodomorph Massospondylus , the early sauropod Vulcanodon and theropod material. Late Triassic localities are also known, but have yielded only fragmentary specimens thus far. In early 2017, a joint South African-Zimbabwean-UK team conducted fieldwork in the upper Karoo-aged deposits along the shores of Lake Kariba, northern Zimbabwe (Mid-Zambesi Basin). We relocated the Vulcanodon type locality on Island 126/127 and found that, contrary to previous reports suggesting a Toarcian age, the quarry was in a horizon pre-dating the onset of Drakensburg volcanism (= Batoka Basalts). It is situated instead within the earlier Lower Jurassic Forest Sandstone. This indicates that Vulcanodon is 10–15 million years older than thought previously, recalibrating several nodes within Sauropoda and indicating extensive overlap between true sauropods and 'prosauropods'. Other new vertebrate localities show that sauropodomorphs are present in the Forest Sandstone and upper Tashinga (Late Triassic) formations, but a grey mudstone facies within the Pebbly Arkose Member of the latter unit yields a more aquatic fauna, including lungfish and phytosaurs, but lacking sauropodomorphs. The phytosaur occurrence is the first in Africa south of the Sahara. Faunal and sedimentological evidence indicates that the Late Triassic and Early Jurassic sites in this region were deposited under more mesic environments than their lateral equivalents in South Africa.

Tetrapod (structure)

10.7287/peerj.preprints.3142v1

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