Living Laboratories for the Cook/Douglass Campus
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Dukengineer Engineering for Social Change Up-And-Coming Researchers Pratt.Duke.Edu | Dukengineer.Pratt.Duke.Edu Edmund T
Student-written since 1940 Edmdund T. Pratt uJr. School of Ek ngineering ate Duke Universnity | 2014 g YEARS OF DUKE ENGINEERING Inside Looking back through the eyes of DukEngineer Engineering for social change Up-and-coming researchers pratt.duke.edu | dukengineer.pratt.duke.edu Edmund T. Pratt Jr. School of Engineering at Duke University 2014 du kengineer ineer Editor-in-Chief Cameron McKay ’14 letters updates Senior Editor 2 Meet the Editors 29 Duke Engineers for International Wyatt Shields 3 From the Dean Development (DEID) Associate Editors 4 From the ESG President 32 Duke Robotics Club Dennis Lynch ’16 5 From the EGSC President Greta O’Brien ’14 Dana Sun ’14 campaign Justin Yu ’15 features 34 How Will Duke Forward Impact Pratt? Consulting Editors 6 Calculating ΔPratt: The History of Duke Minnie Glymph Ken Kingery Engineering as Told Through DukEngineer alumni news Webmaster 10 Future Pratt: What Do Our Next 75 Mandy Ferguson Years Hold? 36 Profile: Q&A with Kenneth Chestnut Designer 37 Class Notes Lacey Chylack 40 In Memory phase five creative,inc research 12 Ultrasound Imaging 14 Microfluidic Biochips development 16 The Pratt Pouch 43 Letter from BOV President 44 Letter from EAC President interviews 45 Annual Fund Statistics 18 Q&A with Professor Heileen Hsu-Kim 48 Honor Roll 20 Q&A with Professor Benjamin C. Lee lighter side education 64 Vintage Quips & Cut-Ups 22 Engineering Careers 26 Developing Technology for the Developing World 28 Engineering and Global Women’s Health CELEBRATING 75 YEARS OF ENGINEERING AT DUKE pratt .duke .edu From the Dean editors Dear Friends of Duke Engineering, Meet the staff This year marks the 75th anniversary of engineering at Duke— and in celebration of that milestone, our students have put together a SENIOR EDITOR: real treat with this commemorative issue of DukEngineer . -
Tectonic Control on 10Be-Derived Erosion Rates in the Garhwal Himalaya, India Dirk Scherler,1,2 Bodo Bookhagen,3 and Manfred R
JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE, VOL. 119, 1–23, doi:10.1002/2013JF002955, 2014 Tectonic control on 10Be-derived erosion rates in the Garhwal Himalaya, India Dirk Scherler,1,2 Bodo Bookhagen,3 and Manfred R. Strecker 1 Received 28 August 2013; revised 13 November 2013; accepted 26 November 2013. [1] Erosion in the Himalaya is responsible for one of the greatest mass redistributions on Earth and has fueled models of feedback loops between climate and tectonics. Although the general trends of erosion across the Himalaya are reasonably well known, the relative importance of factors controlling erosion is less well constrained. Here we present 25 10Be-derived catchment-averaged erosion rates from the Yamuna catchment in the Garhwal Himalaya, 1 northern India. Tributary erosion rates range between ~0.1 and 0.5 mm yrÀ in the Lesser 1 Himalaya and ~1 and 2 mm yrÀ in the High Himalaya, despite uniform hillslope angles. The erosion-rate data correlate with catchment-averaged values of 5 km radius relief, channel steepness indices, and specific stream power but to varying degrees of nonlinearity. Similar nonlinear relationships and coefficients of determination suggest that topographic steepness is the major control on the spatial variability of erosion and that twofold to threefold differences in annual runoff are of minor importance in this area. Instead, the spatial distribution of erosion in the study area is consistent with a tectonic model in which the rock uplift pattern is largely controlled by the shortening rate and the geometry of the Main Himalayan Thrust fault (MHT). Our data support a shallow dip of the MHT underneath the Lesser Himalaya, followed by a midcrustal ramp underneath the High Himalaya, as indicated by geophysical data. -
Channel Morphology and Bedrock River Incision: Theory, Experiments, and Application to the Eastern Himalaya
Channel morphology and bedrock river incision: Theory, experiments, and application to the eastern Himalaya Noah J. Finnegan A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy University of Washington 2007 Program Authorized to Offer Degree: Department of Earth and Space Sciences University of Washington Graduate School This is to certify that I have examined this copy of a doctoral dissertation by Noah J. Finnegan and have found that it is complete and satisfactory in all respects, and that any and all revisions required by the final examining committee have been made. Co-Chairs of the Supervisory Committee: ___________________________________________________________ Bernard Hallet ___________________________________________________________ David R. Montgomery Reading Committee: ____________________________________________________________ Bernard Hallet ____________________________________________________________ David R. Montgomery ____________________________________________________________ Gerard Roe Date:________________________ In presenting this dissertation in partial fulfillment of the requirements for the doctoral degree at the University of Washington, I agree that the Library shall make its copies freely available for inspection. I further agree that extensive copying of the dissertation is allowable only for scholarly purposes, consistent with “fair use” as prescribed in the U.S. Copyright Law. Requests for copying or reproduction of this dissertation may be referred -
Taters Versus Sliders: Evidence for A
Member Recognition Issue VOL. 31, NO. 7 | J U LY 2 021 ’Taters versus Sliders: Evidence for a Long-Lived History of Strike-Slip Displacement along the Canadian Arctic Transform System (CATS) EXPAND YOUR LIBRARY with GSA E-books The GSA Store offers hundreds of e-books, most of which are only $9.99. These include: • popular field guides and maps; Special Paper 413 • out-of-print books on prominent topics; and Earth and • discontinued series, such as Engineering How GeologistsMind: Think Geology Case Histories, Reviews in and Learn about the Earth Engineering Geology, and the Decade of North American Geology. Each book is available as a PDF, including plates and supplemental material. Popular topics include ophiolites, the Hell Creek Formation, mass extinctions, and plates and plumes. edited by Cathryn A. Manduca and David W. Mogk Shop now at https://rock.geosociety.org/store/. JULY 2021 | VOLUME 31, NUMBER 7 SCIENCE 4 ’Taters versus Sliders: Evidence for a Long- Lived History of Strike Slip Displacement along the Canadian Arctic Transform System (CATS) GSA TODAY (ISSN 1052-5173 USPS 0456-530) prints news and information for more than 22,000 GSA member readers William C. McClelland et al. and subscribing libraries, with 11 monthly issues (March- April is a combined issue). GSA TODAY is published by The Geological Society of America® Inc. (GSA) with offices at Cover: Geologists studying structures along the Petersen Bay 3300 Penrose Place, Boulder, Colorado, USA, and a mail- fault, a segment of the Canadian Arctic transform system (CATS), ing address of P.O. Box 9140, Boulder, CO 80301-9140, USA. -
Climate, Tectonics, and the Morphology of the Andes
Climate, tectonics, and the morphology of the Andes David R. Montgomery Greg Balco Sean D. Willett Department of Geological Sciences, University of Washington, Seattle 98195-1310, USA ABSTRACT Large-scale topographic analyses show that hemisphere-scale climate variations are a ®rst-order control on the morphology of the Andes. Zonal atmospheric circulation in the Southern Hemisphere creates strong latitudinal precipitation gradients that, when incor- porated in a generalized index of erosion intensity, predict strong gradients in erosion rates both along and across the Andes. Cross-range asymmetry, width, hypsometry, and maximum elevation re¯ect gradients in both the erosion index and the relative dominance of ¯uvial, glacial, and tectonic processes, and show that major morphologic features cor- relate with climatic regimes. Latitudinal gradients in inferred crustal thickening and struc- tural shortening correspond to variations in predicted erosion potential, indicating that, like tectonics, nonuniform erosion due to large-scale climate patterns is a ®rst-order con- trol on the topographic evolution of the Andes. Keywords: geomorphology, erosion, tectonics, climate, Andes. INTRODUCTION we argue for the ®rst-order importance of earthquake cycle. Some studies have attribut- The presence or absence of mountain rang- large-scale climate zonations and resulting dif- ed local variations in structural, metamorphic, es at the global scale is determined by the lo- ferences in geomorphic processes to the mor- and geomorphic characteristics of the central cation and type of plate boundaries. Other fac- phology of mountain ranges. Andes to erosion (Gephart, 1994; Masek et al., tors become important in the evolution of 1994; Horton, 1999), but none has considered individual mountain systems. -
Extension Rates Impact on Endorheic Drainage Longevity and Regional Sediment Discharge
Extension rates impact on endorheic drainage longevity and regional sediment discharge Michael A. Berry1 Jolante van Wijk1, Daniel García-Castellanos2, Daniel Cadol1, Erica Emry1 1- New Mexico Tech; Socorro, NM 2- Instituto de Ciencias de la Tierra Jaume Almera (ICTJA-CSIC), Barcelona, Spain Tectonic and climate drivers exert co-equal forces on the evolution of tectonic sedimen- tary basins. The Rio Grande rift and its drainages provide a backdrop for discussing which drivers drive the transition from endorheic or closed drainage basins to exorheic or open, through-going drainage basins, with both climatic and tectonic drivers being pro- posed by researchers. With a dearth of regional scale extensional landscape modeling studies to draw from, we explore the impact of tectonic extension on endorheic-exorheic transitions and regional sediment and water discharge in both a “dry” and “wet” runoff regimes. We show that holding climate-induced runoff constant, that greater extensional rates correspond to a longer period of sedimentation capture, tectonically induced gradi- ents significantly increases sedimentation long after tectonic activity has terminated, and that developing an endorheic basin is very difficult in high runoff regimes. Implementation of FastScape into reusable software components Benoît Bovy (1) and Jean Braun (1) (1) GFZ Potsdam, Germany We present ongoing work on the development of open-source software around FastScape, a name used to designate a set of efficient algorithms for solving common problems in landscape evolution modelling. The software suite is divided into components that can be reused in many different contexts including experi- mentation, model coupling and direct integration within various scientific software ecosystems. -
September Gsat 03
AL SOCIET IC Y G O O F L A O M E E G R I E C H A T GROUNDWORK Furthering the Influence of Earth Science The state of interactions among tectonics, erosion, and climate: A polemic Peter Molnar, Dept. of Geological Sciences, Cooperative what “controlled” the change in those quantities, or what Institute for Research in Environmental Sciences (CIRES), “drove” them. The occurrence of change, external to “equation University of Colorado, Boulder, Colorado 80309-0399, (1),” transforms questions that concern drivers or controls from USA; [email protected] being ill posed to well posed. In the earth sciences, perhaps no concept illustrates better a state of quasi-equilibrium than isostasy. Isostasy is not a pro- Since Dahlen and Suppe (1988) showed that erosion can cess; it exists. On short time scales (thousands of years), vis- affect the tectonics of the region undergoing that erosion, cous deformation can retard the inexorable trend toward geodynamicists, tectonic geologists, and geomorphologists isostatic equilibrium, as is illustrated well by the rebound fol- have joined in an effort to unravel the interrelationships lowing the melting of Pleistocene ice sheets. Thus, on such among not only erosion and tectonics but also climate, which time scales, one might understand pressure differences in the affects erosion and is affected by tectonics. The fruits of this asthenosphere as “driving” the overlying lithosphere and sur- effort grow continually, as shown in part by the attraction that faces of Canada or Fennoscandia upward. On longer geologic this subject has for students and young scientists. Yet, it seems time scales, however, isostasy is maintained as a state of equi- to me that progress has been limited by a misconception that librium; like the perfect gas law, “isostasy,” therefore, does not has stimulated this polemic. -
Duke University (North Carolina)
NONPROFIT ORG. U.S. POSTAGE • DUKE MAGAZINE PAID DUKEMAGAZINE PPCO DUKE UNIVERSITY, BOX 90572 DURHAM, NORTH CAROLINA 27708-0572 SPECIAL ISSUE 2017 SPECIAL ISSUE 2017 MAGAZINE THESECRETSISSUE Whose home is this? For the Duke graduate who lived here, it was a place where all that was collected served as inspiration and homage, and perhaps for visitors, as revelation. Learn the answer and see more, beginning on page 38. Photos by Alex Harris Outrageous ambition Climate change. Energy. Medicine. At Duke, engineering students like Lauren Shum ’17 tackle big challenges head on. Thanks to a planned gift supporting financial aid at the Pratt School of Engineering, we can recruit more students based on their ambition to change the world, rather than their ability to pay. Made possible by you. Grand Challenge Scholar and financial aid recipient Lauren Shum ’17 wants to make solar energy economical. Together with fellow Duke Smart Home students, she designed and installed the solar charging station on a swinging bench by McClendon Bridge. This bright idea gives students a sustainable light and power source. Read about alumnus Chun Lam’s planned gift to benefit engineering students on page 76. Whether you leave a legacy with a planned gift or make an immediate impact with an Annual Fund donation, every dollar makes a difference. Together, we are generating the means for the next generation of Duke students and faculty to advance ideas, make new connections, and move the world forward. giving.duke.edu/giftplanning | (919) 681-0464 GP_Made Possible By You_F3.indd 1 7/31/17 2:16 PM SPECIALISSUE A collection of essays and images from Duke faculty, students, staff, and alumni FROM THE EDITOR 4 Are your secrets safe with Duke? By Robert J. -
Uplift and Erosion of the San Bernardino
TECTONICS, VOL. 17, NO.3, PAGES, 360-378 JUNE 1998 Uplift and erosion of the San Bernardino Mountains associated with transpression along the San Andreas fault, California, as constrained by radiogenic helium thermochronometry James A. Spotila, Kenneth A. Farley, and Kerry Sieh Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena Abstract. Apatite helium thermochronometry provides 1. Introduction new constraints on the tectonic history of a recently The San Bernardino Mountains (SBMs) have risen uplifted crystalline mass adjacent to the San Andreas fault. during the past few Myr in association with transpression By documenting aspects of the low-temperature (40°- along the San Andreas fault zone in southern California 100°C) thermal history of the tectonic blocks of the San [cf. Dibblee, 1975; Sadler, 1982a; Meisling and Weldon, Bernardino Mountains in southern California, we have 1989]. The complex evolution of this convergent stretch placed new constraints on the magnitude and timing of of the San Andreas system and the relationship between uplift. Old helium ages (64-21 Ma) from the large Big transpression and orogeny along it are not fully understood Bear plateau predate the recent uplift of the range and show [Matti and Morton, 1993; Weldon eta/., 1993; Dibblee, that only several kilometers of exhumation has taken place 1982]. At first glance, the SBMs appear to be a single since the Late Cretaceous period. These ages imply that structural entity because of their discrete geographic form the surface of the plateau may have been exposed in the (Plate 1). However, the range actually consists of several late Miocene and was uplifted only -1 km above the distinct, fault-bounded blocks that diminish in size and Mojave Desert in the last few Myr by thrusting on the become more structurally complex toward the San Andreas north and south. -
Rivers and Riverine Landscapes 3 4 David R
1 2 Rivers and riverine landscapes 3 4 David R. Montgomery1 and Ellen E. Wohl2 5 6 1 Department of Earth and Space Sciences, University of Washington, Seattle, WA, USA 7 2 Department of Earth Resources, Colorado State University, Ft. Collins, CO, USA 8 9 10 11 Introduction Types of Channels 12 13 The study of fluvial processes and sediment transport has Recognition that there are different types of river and stream 14 a long history (e.g. Chezy,´ 1775; du Boys, 1879; Manning, channels is nothing new. In a paper based on his experiences 15 1891; Shields, 1936) before groundbreaking studies in the with the U.S. Exploring Expedition from 1838 to 1842, J.D. 16 1950s and 1960s established fundamental empirical aspects Dana discussed fundamental differences between mountain 17 of hydraulic geometry and advanced understanding of the channels and lowland rivers on islands of the South Pacific 18 general processes governing river morphology and dynamics. (Dana, 1850). Similarly, large differences in river patterns 19 Over the last 40 years fluvial geomorphology has grown from (e.g. braided, meandering, and straight) have been recognized 20 a focus primarily on studies of the mechanics and patterns of and studied for decades. Although many fundamental aspects 21 alluvial rivers to an expanded interest in mountain channels, of river processes have been applied in the study of rivers 22 the role of rivers in landscape evolution and as a geological worldwide, researchers have increasingly recognized that 23 force, and the relation of fluvial processes to aquatic and ripar- rivers also have distinctly regional character (e.g. -
Reunions Weekend- Something for Everyone!
Reunions Weekend- Something for Everyone! General Schedule of Events Friday: • 9:00 am – 10:00 pm: Check-in throughout the day at the Karsh Alumni and Visitors Center located on the corner of Chapel Drive and Duke University Road • 9:00 am – 5:00 pm: Tours, educational programming, school/department/program open houses and lectures, and affinity group activities… something for everyone! • 3:00 pm – 3:30 pm: Service of Thanksgiving and Remembrance for deceased alumni in Duke Chapel’s Memorial Chapel • 6:00 pm – 9:30 pm: Friday Night Class Gatherings Kick-off Reunion Weekend by joining classmates for signature cocktails and delicious local refreshments - the perfect way to celebrate the start of what is sure to be an unforgettable weekend. Stop in before heading to dinner with friends or make an evening of it – either way, don’t miss out! Saturday: • 8:00 am – 4:00 pm: Check-in continues at the Karsh Alumni and Visitors Center • 9:00 am – 5:00 pm: Throughout the day enjoy tours, educational programming, school/department/program open houses and lectures, family-friendly activities and affinity group gatherings • 11:00 am – 12:15 pm: Reflections with Vincent E. Price and class gift presentations in Page Auditorium • Saturday evening: Your Class’ Reunion Party! Sunday: • 10:00 am – 1:00 pm: Champagne Toast in Duke Gardens (rain site is Wilson Gym) Educational Opportunities Listen to Duke’s world class faculty members discuss hot button issues and learn about all of the cutting edge research taking place at Duke in a variety of fields. Educational programs offered in 2019 included: • A multidisciplinary panel on Brain Health (co-presented with the Duke Institute of Brain Sciences) • A session on student activism at Duke featuring an in-depth discussion with faculty and students about the impacts of student activism from 1969 to today and the role student activism plays in the Duke experience. -
Dukes & Duchesses
DUKES & DUCHESSES Recruitment 2016 Test Study Guide (As of January 27, 2016) A note about the test: The D&D test is intended to assess your familiarity of Duke University, its history, and current events around the world, as we desire candidates that can speak knowledgeably with University leaders and campus guests. The test consists of two parts: Part I covers the history of Duke as outlined in this packet. These questions are factual and require an extensive knowledge of the information – we suggest that you study well in advance. Part II is a general knowledge section. It will cover current events here at Duke, in the Durham community, and around the world. Though there is no specific way to study for this section, it is suggested that you read The Chronicle regularly and stay informed on current events in the news, especially in the weeks leading up to the exam. Please direct any questions to Megan Hastings at [email protected] Good luck! 2016 Testing Dates: Tuesday, February 16: Physics 128 from 7:30-8:30pm Wednesday, February 17: East Duke 209 from 7:30-8:30pm Application Deadline: Thursday, February 18 at 11:59pm Application available online at http://sites.duke.edu/dukesandduchesses/ UNIVERSITY ADMINISTRATION AND NAMES TO KNOW Richard H. Brodhead President Tallman Trask III Executive Vice President/Treasurer Sally Kornbluth Provost Michael Schoenfeld Vice President for Public Affairs and Governmental Relations Larry Moneta Vice President for Student Affairs Kyle Cavanaugh Vice President, Administration Robert S. Shepard Vice President for Alumni Affairs and Development Phail Wynn Vice President for Durham and Regional Affairs Richard Riddell Vice President and University Secretary Kevin White Vice President and Director of Athletics A.