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Stability of wall modes in a flexible tube - Cambridge Journals

The asymptotic results (Kumaran 1998b) obtained for Λ ∼ 1 for the flow in a flexible tube are extended to the limit Λ 1 using a numerical scheme, where Λ is the dimensionless parameter Re1/3 (G/ρV 2 ), Re = (ρV R/η) is the Reynolds number, ρ and η are the density and viscosity of the fluid, R is the tube radius and G is the shear modulus of the wall material. The results of this calculation indicate that the least-damped mode becomes unstable when Λ decreases below a transition value at a fixed Reynolds number, or when the Reynolds number increases beyond a transition value at a fixed Λ. The Reynolds number at which there is a transition from stable to unstable perturbations for this mode is determined as a function of the parameter Σ = (ρGR 2 /η 2 ), the scaled wavenumber of the perturbations kR, the ratio of radii of the wall and fluid H and the ratio of viscosities of the wall material and the fluid ηr . For ηr = 0, the Reynolds number at which there is a transition from stable to 1, and the unstable perturbations decreases proportional to Σ 1/2 in the limit Σ neutral stability curves have a rather complex behaviour in the intermediate regime with the possibility of turning points and isolated domains of instability. In the limit Σ 1, the Reynolds number at which there is a transition from stable to unstable perturbations increases proportional to Σ α , where α is between 0.7 and 0.75. An increase in the ratio of viscosities ηr has a complex effect on the Reynolds number for neutrally stable modes, and it is observed that there is a maximum ratio of viscosities at specified values of H at which neutrally stable modes exist; when the ratio of viscosities is greater than this maximum value, perturbations are always stable.

BIOFLUID MECHANICS IN FLEXIBLE TUBES James B. Grotberg1 ...

When a flow is driven through a deformable channel or tube, interactions between fluid-mechanical and elastic forces can lead to a variety of biologically significant phenomena, including nonlinear pressure-drop/flow-rate relations, wave propagation, and the generation of instabilities. Understanding the physical origin and nature of these phenomena remains a significant experimental, analytical, and computational challenge, involving unsteady flows at low or high Reynolds numbers, large-amplitude fluid-structure interactions, free-surface flows, and intrinsically 2D or 3D motion. Whereas frequently the internal flow involves a single fluid phase (albeit often of a complex biological fluid such as blood), in many instances the presence of two or more distinct flowing phases is of primary importance (as is the case for air-liquid flows in peripheral lung airways, for example). We divide this review accordingly: Section 2 treats single-phase flows in collapsible tubes, Section 3 covers recent applications of such flows to a wide range of physiological 0066-4189/04/0115-0121$14.00

Memphis Campus Map Buildings Legend - The University of ...

Briley Parkway Presidential Self-Parking Lot Convention Center Entrance Magnolia Canopy Complex/ Wildhorse Shuttle Presidential Portico East 1 2 Delta Pavilion Chef’s Corner Crystal Gazebo Delta Landing Presidential Section 3 4 Shoe Shine Valet Parking Lion’s Head Fountain Tennessee Section Governor’s Section Magnolia Lobby Magnolia Entrance EVENT LOCATIONS Convention Center Magnolia Section Ryman B Exhibit Hall 5 6 Gaylord Springs Golf Links Pick-up Magnolia Water’s Edge Business Center 9 7 KEY N Garden Conservatory Canopy Automated External Defibrillator South 8 West Delta Section Chef’s Corner 26 25 Delta Pavilion ATM 10 27 Shuttle Transportation Delta 11 Hertz Car Rental 28 Elevator 12 Escalator 14 13 15 29 Lion’s Head Fountain Restrooms 16 Garden Conservatory Smoking Area Delta Entrance Crystal Gazebo Taxi Pick-up Access Route Delta Portico Grand Ole Opry House OP DELTA WALKWA WALKW DELTA WAY N Complex/ Wildhorse Shuttle WA L K AY RY Lost & Found Y 19 Cascades Canopy Gaylord Opryland Events Center OPR Cascades Self-Parking Lot Water’s Edge Delta Landing YW ALK Y 20 WA 21 OP 22 RY WA L KWAY 24 tratio RY W L A Convention Center Cascades E n Regis tratio Regis Concierge KW OP n 23 AY Cascades Airport Shuttle Delta Cascades Entrance Relâche Entrance 17 Gaylord Springs Golf Links Pick-up Valet Parking N S Magnolia 18 Self-Parking Lot Entrance Garden Conservatory W 18 Relâche Relâche DINING QUICK EATS NIGHTLIFE RETAIL RECREATION 2 Fuse Sports Club 3 Findley’s Irish Pub 12 Paisano’s Pizzaria & Vino 2 Fuse Sports Club N Necessities Shops 9 Magnolia Pool 13 Häagen-Dazs 3 Findley’s Irish Pub 1 Cowboys & Angels 16 Delta Riverboats 5 Jack Daniel’s 14 Stax (Burgers) 5 Jack Daniel’s 4 Savannah’s 11 Old Hickory Steakhouse 24 Cocoa Bean 10 Library Lounge 6 Lindsay Phillips 21 Cascades American Café 25 Christie Cookies 20 The Falls 7 Johnston & Murphy 22 Wasabi’s (Sushi Bar) 26 Conservatory Café 28 The Conservatory Bar 8 Alexander Kalifano 18 Cascades Pool 15 Delta Island Shops 19 Video Game Arcade 27 Ravello (Italian) Lower Level 29 Solario (Mexican) Lower Level Lower Level 17 Relâche Boutique Lower Level 18 Relâche Spa, Salon, Fitness Center, Indoor Pool 2nd Level Lower Level 2nd Level 23 Signature GO-2449-12 06/27 Your Guide To Gaylord Opryland’s Convention Center Get Social with Us Meeting & Exhibition Space Meeting Room Section of Convention Center Level Nearest Elevator Bayou A-E Delta Section M (Mezz) D4 Belle Meade A-D Magnolia Section M (Mezz) M2 Belmont A-C Magnolia Section M (Mezz) M2 Canal A-E Delta Section M (Mezz) D4 Cheekwood A-H Magnolia Section M (Mezz) M2 Delta Island A-F Delta Island (above retail shops) M (Mezz) D5 Delta Island Boardroom Delta Island (above retail shops) M (Mezz)  ...

Gaylord Opryland Map
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Briley Parkway Presidential Self-Parking Lot Convention Center Entrance Magnolia Canopy Complex/ Wildhorse Shuttle Presidential Portico East 1 2 Delta Pavilion Chef’s Corner Crystal Gazebo Delta Landing Presidential Section 3 4 Shoe Shine Valet Parking Lion’s Head Fountain Tennessee Section Governor’s Section Magnolia Lobby Magnolia Entrance EVENT LOCATIONS Convention Center Magnolia Section Ryman B Exhibit Hall 5 6 Gaylord Springs Golf Links Pick-up Magnolia Water’s Edge Business Center 9 7 KEY N Garden Conservatory Canopy Automated External Defibrillator South 8 West Delta Section Chef’s Corner 26 25 Delta Pavilion ATM 10 27 Shuttle Transportation Delta 11 Hertz Car Rental 28 Elevator 12 Escalator 14 13 15 29 Lion’s Head Fountain Restrooms 16 Garden Conservatory Smoking Area Delta Entrance Crystal Gazebo Taxi Pick-up Access Route Delta Portico Grand Ole Opry House OP DELTA WALKWA WALKW DELTA WAY N Complex/ Wildhorse Shuttle WA L K AY RY Lost & Found Y 19 Cascades Canopy Gaylord Opryland Events Center OPR Cascades Self-Parking Lot Water’s Edge Delta Landing YW ALK Y 20 WA 21 OP 22 RY WA L KWAY 24 tratio RY W L A Convention Center Cascades E n Regis tratio Regis Concierge KW OP n 23 AY Cascades Airport Shuttle Delta Cascades Entrance Relâche Entrance 17 Gaylord Springs Golf Links Pick-up Valet Parking N S Magnolia 18 Self-Parking Lot Entrance Garden Conservatory W 18 Relâche Relâche DINING QUICK EATS NIGHTLIFE RETAIL RECREATION 2 Fuse Sports Club 3 Findley’s Irish Pub 12 Paisano’s Pizzaria & Vino 2 Fuse Sports Club N Necessities Shops 9 Magnolia Pool 13 Häagen-Dazs 3 Findley’s Irish Pub 1 Cowboys & Angels 16 Delta Riverboats 5 Jack Daniel’s 14 Stax (Burgers) 5 Jack Daniel’s 4 Savannah’s 11 Old Hickory Steakhouse 24 Cocoa Bean 10 Library Lounge 6 Lindsay Phillips 21 Cascades American Café 25 Christie Cookies 20 The Falls 7 Johnston & Murphy 22 Wasabi’s (Sushi Bar) 26 Conservatory Café 28 The Conservatory Bar 8 Alexander Kalifano 18 Cascades Pool 15 Delta Island Shops 19 Video Game Arcade 27 Ravello (Italian) Lower Level 29 Solario (Mexican) Lower Level Lower Level 17 Relâche Boutique Lower Level 18 Relâche Spa, Salon, Fitness Center, Indoor Pool 2nd Level Lower Level 2nd Level 23 Signature GO-2449-12 06/27 Your Guide To Gaylord Opryland’s Convention Center Get Social with Us Meeting & Exhibition Space Meeting Room Section of Convention Center Level Nearest Elevator Bayou A-E Delta Section M (Mezz) D4 Belle Meade A-D Magnolia Section M (Mezz) M2 Belmont A-C Magnolia Section M (Mezz) M2 Canal A-E Delta Section M (Mezz) D4 Cheekwood A-H Magnolia Section M (Mezz) M2 Delta Island A-F Delta Island (above retail shops) M (Mezz) D5 Delta Island Boardroom Delta Island (above retail shops) M (Mezz)

HIGH-END NOTEBOOK PERFORMANCE COMPARISON: DELL PRECISION M3800 VS. 2012 AND 2013 APPLE MACBOOK PRO WITH RETINA DISPLAY

When selecting a high-end portable workstation for multimedia creation and viewing, performance counts. Large files and complex applications can slow systems with limited amounts of RAM or basic graphic cards. Those who invest in a system with a powerful 4th generation Intel® Core™ i7 processor, 16 GB of RAM, and two heavy-duty graphics cards do so because their compute-intensive workloads require such hardware. In our labs, we tested three current high-end portable systems, a 4th generation Intel Core processor-based Dell Precision M3800 with QHD+ touchscreen display, a similarly configured 2013 Apple MacBook Pro with Retina display, and a 2012 Apple MacBook Pro with Retina display, to see how well they performed. While the systems were comparably configured, the Dell Precision M3800 has a touch screen and runs Windows 8.1, allowing users to select, zoom, and edit their work right on the screen. It also has three times the storage capacity of the 2012 MacBook Pro and 33 percent more than the 2013 MacBook Pro, which is very useful for storing large multimedia files. The Dell Precision M3800 outperformed both MacBook Pro systems on several tests. Along with its $2,249 purchase price, which is 13.5 percent lower than that of the 2013 MacBook Pro, these advantages make the Dell Precision M3800 an excellent choice for those who work with multimedia content and need an extremely powerful system they can use at the office and on the go.

Climate Change 2014: Impacts, Adaptation, and Vulnerability ... - IPCC

ASSESSING AND MANAGING THE RISKS OF CLIMATE CHANGE Human interference with the climate system is occurring,1 and climate change poses risks for human and natural systems (Figure SPM.1). The assessment of impacts, adaptation, and vulnerability in the Working Group II contribution to the IPCC’s Fifth Assessment Report (WGII AR5) evaluates how patterns of risks and potential benefits are shifting due to climate change. It considers how impacts and risks related to climate change can be reduced and managed through adaptation and mitigation. The report assesses needs, options, opportunities, constraints, resilience, limits, and other aspects associated with adaptation. Climate change involves complex interactions and changing likelihoods of diverse impacts. A focus on risk, which is new in this report, supports decision-making in the context of climate change, and complements other elements of the report. People and societies may perceive or rank risks and potential benefits differently, given diverse values and goals. Compared to past WGII reports, the WGII AR5 assesses a substantially larger knowledge base of relevant scientific, technical, and socioeconomic literature. Increased literature has facilitated comprehensive assessment across a broader set of topics and sectors, with expanded coverage of human systems, adaptation, and the ocean. See Background Box SPM.1.2 Section A of this summary characterizes observed impacts, vulnerability and exposure, and adaptive responses to date. Section B examines future risks and potential benefits. Section C considers principles for effective adaptation and the broader interactions among adaptation, mitigation, and sustainable development. Background Box SPM.2 defines central concepts, and Background Box SPM.3 introduces terms used to convey the degree of certainty in key findings. Chapter references in brackets and in footnotes indicate support for findings, figures, and tables. Figure SPM.1: Illustration of the core concepts of the WGII AR5. Risk of climate-related impacts results from the interaction of climate-related hazards (including hazardou...

Climate change flyer05-05_fin.qxp - National Academies

Joint science academies’ statement: Global response to climate change Climate change is real There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring1. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001)2. This warming has already led to changes in the Earth's climate. The existence of greenhouse gases in the atmosphere is vital to life on Earth – in their absence average temperatures would be about 30 centigrade degrees lower than they are today. But human activities are now causing atmospheric concentrations of greenhouse gases – including carbon dioxide, methane, tropospheric ozone, and nitrous oxide – to rise well above pre-industrial levels. Carbon dioxide levels have increased from 280 ppm in 1750 to over 375 ppm today – higher than any previous levels that can be reliably measured (i.e. in the last 420,000 years). Increasing greenhouse gases are causing temperatures to rise; the Earth’s surface warmed by approximately 0.6 centigrade degrees over the twentieth century. The Intergovernmental Panel on Climate Change (IPCC) projected that the average global surface temperatures will continue to increase to between 1.4 centigrade degrees and 5.8 centigrade degrees above 1990 levels, by 2100.

fx-991ES PLUS C - Support - Casio
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Contents Important Information ............................................................. 2 Sample Operations .................................................................. 2 Initializing the Calculator ........................................................ 2 Safety Precautions .................................................................. 2 Handling Precautions.............................................................. 2 Removing the Hard Case ........................................................ 3 Turning Power On and Off ...................................................... 3 Adjusting Display Contrast .................................................... 3 Key Markings ........................................................................... 3 Reading the Display ................................................................ 4 Using Menus ............................................................................ 5 Specifying the Calculation Mode .......................................... 5 Configuring the Calculator Setup .......................................... 5 Inputting Expressions and Values ......................................... 7 Recurring Decimal Calculations ......................................... 10 Toggling Calculation Results ............................................... 14 Basic Calculations................................................................. 14 Remainder Calculations ....................................................... 18 Prime Factorization ............................................................... 19 Function Calculations ........................................................... 20 Complex Number Calculations (CMPLX) ........................... 25 Using CALC............................................................................ 26 Using SOLVE.......................................................................... 27 Statistical Calculations (STAT) ............................................. 29 Base-n Calculations (BASE-N) ............................................. 33 Equation Calculations (EQN) ............................................... 35 Matrix Calculations (MATRIX)............................................... 37 Creating a Number Table from Two Functions (TABLE) .... 39 Vector Calculations (VECTOR) ............................................. 41 Inequality Calculations (INEQ) ............................................ 43 Using VERIFY (VERIF) .......................................................... 45 Distribution Calculations (DIST) .......................................... 47 Scientific Constants .............................................................. 50 Metric Conversion ................................................................. 51 Calculation Ranges, Number of Digits, and Precision....... 52 Errors ...................................................................................... 54 Before Assuming Malfunction of the Calculator... ............. 56

Hydroponic Tomatoes Hydroponic Tomatoes - Greenhouse Product ...

greenhouse vegetables Hydroponic Tomatoes Maximizing yields from hydroponic tomato crops has long been the main objective of commercial growers. However, there’s growing consumer pressure to produce high-quality, great-tasting fruit that stores and handles well in the retail sector. By Lynette Morgan T Top: Properly grown hydroponic tomatoes are often fit to be framed; Bottom: This single-truss crop is being grown on greenhouse benches in NFT. (Photos courtesy of Lynette Morgan) Hydroponic Resource Are you looking to grow more greenhouse vegetables or growing hydroponically? GPN will bring you a few articles a year, but if you want in-depth information year-round, research such as this can be found in The Growing Edge magazine. It is a great resource for hydroponic growers. Visit www.growingedge.com or call (800) 888-6785 for subscription and other information. 78 GPN October 2003 omatoes, the biggest hydroponically produced crop on a worldwide scale, are complex in their physiology and response to crop management techniques since vegetative growth, flowering and fruiting all need to be continually maintained simultaneously on the plant. Obtaining economic yields of highquality fruit while minimizing the use of pesticides and other agrichemicals has put commercial tomato growers under increasing pressure, and many are now looking to modified hydroponic systems where higher profits are possible. Many of these new tomato-growing techniques involve the production of “spray-free” crops and using organically based systems. Today’s selection includes a wide range of new, fresh tomato products, such as lowacid fruit; on-the-truss, cluster or vine-ripened fruit; and many new....

AEG/Electrolux standardizes on Z tel® HTN for oven fans and frames

AEG/Electrolux standardizes on Zytel HTN for oven fans and frames ® AEG/Electrolux has standardized on glass-reinforced Zytel®HTN for the high-speed fans and inner glass door support frames in its new Competence range of electric ovens. By Hubert Mueller, DuPont Engineering Polymers, Germany Switching to glass-reinforced Zytel® HTN high performance polyamide from metal means that AEG/Electrolux can standardize the fans and support frames used across its new range of Competence electric ovens. "By moulding these components in Zytel® HTN , we have reduced the overall number of parts used, improved production efficiency and implemented substantial cost savings," said the design director for Electrolux’s Competence range, Horst Meister, who is based at Electrolux’s Central European Oven Development Centre in Rothenburg ob der Tauber (Germany). AEG/Electrolux requires high temperature dimensional stability for the fans, which need to run reliably at continuous temperatures of up to 260 degrees C – necessary when the oven is being automatically cleaned by pyrolysis at up to 500 degrees C. The fans of glass reinforced Zytel® HTN meet this specification with ease. As an added plus, the new high-speed fans also cool down oven door exteriors better than the previous, metal fans. Even after a full hour of hot air operation, the outside surface of the oven doors reach an average of only 40 degrees C, whereas the doors reached up to 80 degrees C when they were cooled by metal fans. The complex design of AEG/ Electrolux’s Competence oven fans means that the mould tool is unusually large; it is about the size of an office desk. This is because seven solid cores were required for the...

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