Navigation Links
Floating a big idea: MIT demos ancient use of rafts to transport goods
Date:3/19/2008

ng problem to get one of these to work properly, explained Dewan, who graduated last year with a double major in nuclear engineering and mechanical engineering. Although the early sketches give a general sense of the construction, it took careful study with a computerized engineering design program to work out details of dimensions, materials, sail size and configuration, and the arrangement of centerboards. These boards were used in place of a keel to prevent the craft from being blown to the side, and also provided a steering mechanism by selectively raising and lowering different boards from among two rows of them arranged on each side of the craft.

Although much of the raft design may have seemed familiar to the Europeans, some details were unique, such as masts made from flexible wood so that they could be curved downward to adjust the sails to the strength of the wind, the centerboards used as a steering mechanism, and the use of balsa wood, which is indigenous to Ecuador.

Dewan also analyzed the materials used for the construction, including the lightweight balsa wood used for the hull. Besides having to study the aerodynamics and hydrodynamics of the craft and the properties of the wood, cloth and rope used for the rafts and their rigging, she also ended up delving into some biology. It turns out that one crucial question in determining the longevity of such rafts had to do with shipworms-how quickly and under what conditions would they devour the rafts? And were shipworms always present along that Pacific coast, or were they introduced by the European explorers?

Shipworms are molluscs that can be the width of a quarter and a yard long. Because balsa wood is so soft, and doesn't have silicates in it like most wood, they are able to just devour it very quickly, Dewan said. It turns into something like cottage cheese in a short time.

That may be why earlier attempts to replicate the ancient rafts had failed, Dewan said. Afte
'/>"/>

Contact: Elizabeth Thomson
thomson@mit.edu
617-258-5402
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Ancient mystery solved
2. New dinosaur from Mexico offers insights into ancient life on West America
3. Scientists rebuild ancient proteins to reveal primordial Earths temperature
4. Avian origins: new analysis confirms ancient beginnings
5. Ancient fish bones reveal impacts of global warming beneath the sea
6. Scientists melt million-year-old ice in search of ancient microbes
7. Ancient amphibians left full-body imprints
8. Newfound ancient African megadroughts may have driven the evolution of humans and fishes
9. 454 Sequencing: Science paper describes a novel, highly efficient method of sequencing ancient DNA
10. Ancient whale fall from Californias Ao Nuevo Island one of youngest, most complete known
11. Ancient whale fall from Californias Año Nuevo Island one of youngest, most complete known
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/18/2014)... The Parenteral Drug Association (PDA) today confirmed that seven officials ... least seven more will participate in the upcoming 2014 PDA ... Washington D.C. , Dec. 2-4. ... the regulatory agencies in the United States ... to help advance the use of metrics in the regulatory ...
(Date:11/10/2014)... U.S. store shelves in early 2010, and people have ... packets can be tossed into a washing machine without ... The convenience, though, has come with risks for young ... Children,s Hospital found that from 2012 through 2013, U.S. ... than 6 years of age swallowing, inhaling, or otherwise ...
(Date:11/6/2014)... yet progress in preventing and treating migratory cancer ... challenging to design drugs that work against metastasis," ... at Harvard Medical School. , "Unfortunately, many ... , Gujral and colleagues have now identified a ... how metastasis begins. Their findings may also inform ...
Breaking Biology News(10 mins):FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2Study finds laundry detergent pods, serious poisoning risk for children 2Migration negation 2Migration negation 3
... Understanding the structure, function, and development of the ... the great scientific challenges of our time. The ... to create unique databases and analytical tools for ... them to brain research and linking them with ...
... embedded with bright, light-emitting molecules have enabled researchers ... below the skin surface using only infrared light. ... based at the University of Pennsylvania and the ... porphyrins within the surface of a polymersome, a ...
... Although new HIV treatments have drastically reduced the ... remains a health threat in many developing countries. ... sarcoma ?a cancer-like viral disease traditionally associated with ... Howard Hughes Medical Institute (HHMI) investigator, and HHMI ...
Cached Biology News:Wiley announces publication of Databasing the Brain 2Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin 2How an AIDS-Related Cancer Unleashes Inflammation 2How an AIDS-Related Cancer Unleashes Inflammation 3
(Date:11/26/2014)... November 25, 2014 Whitehouse Laboratories ... joined the Morris County (New Jersey) Chamber of ... a leading business organization in the North Jersey ... further engage some key clients in the pharmaceutical ... the geographic area. Membership enables Whitehouse Laboratories a ...
(Date:11/26/2014)... (PRWEB) November 25, 2014 The Pittcon ... its official conference and exposition mobile app, ... free download in the App Store for iOS and ... valuable resource tool before, during and after the event. ... details on exhibiting companies, technical sessions, Conferee Networking sessions ...
(Date:11/26/2014)... N.J. and WILMINGTON, DE (PRWEB) November 26, 2014 ... 2nd Annual MPN Heroes recognition reception on December 5, ... of Hematology’s annual meeting. The MPN Heroes event will ... contributions in the field of myeloproliferative neoplasms (MPNs). ... show "Nashville," will discuss his family's cancer journey at ...
(Date:11/26/2014)... novembre 2014 /PRNewswrie/ -- Theravalues Corporation annuncia con orgoglio ... in occasione di Hi Europe 2014 (dal 2 al ... Si tratta della curcumina con la maggiore biodisponibilità di ... e ingredienti approvati dalle norme europee. La ... pianta curcumina ( Curcuma longa ) che è stata ...
Breaking Biology Technology:Whitehouse Laboratories Joins Morris County Chamber of Commerce 2Whitehouse Laboratories Joins Morris County Chamber of Commerce 3Pittcon Releases 2015 Mobile App 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 2La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 3
... Biosciences, Inc.,(Nasdaq: RDEA ) today announced that preclinical data will ... Digestive Disease Week (DDW) 2008 in San Diego., The ... Date/Time: Tuesday, May 20, 2008 at 3:30 p.m. Pacific Time ... Selective MEK Inhibitor Ameliorates Murine ...
... CHICAGO, May 14 Last month a lawsuit ... of Davenport,Iowa resident, Mark Scott who suffered the tragic ... The complaint was filed On April 1, 2008 in,the ... and alleges that,Melissa Scott,s untimely death was caused by ...
... Augments Senior Management Team with Recent Strategic Hires ... ... May 14 Triple-S,Management Corporation (NYSE: GTS ) today announced that ... for the Children,s Oncology Group and,the Dana Farber Acute Lymphoblastic Leukemia Consortium, ...
Cached Biology Technology:Ardea Biosciences to Present Data on Lead MEK Inhibitor, RDEA119, at Digestive Disease Week 2008 2Iowa Resident Dies After Using Contaminated Blood Thinner 2Iowa Resident Dies After Using Contaminated Blood Thinner 3Triple-S Management Corporation Appoints New Non-Executive Chairman to Board; Adds New Director 2
...
... is a genetically engineered Klenow polymerase in which ... removed, leaving only the 5 to 3 polymerase ... Klenow Fragment the enzyme of choice for isotopic ... random primed method, and for DNA sequencing by ...
Request Info...
supplied with 10x reaction buffer...
Biology Products: