What Is Barrage Tidal Power?

With only a few operating plants globally (a large 240 MW plant on the Rance River, and two small plants, one on the Bay of Fundy and the other across a tiny inlet in Kislaya Guba Russia), the barrage method of extracting tidal energy involves building a barrage across a bay or river as in the case of the Rance tidal power plant in France. Turbines installed in the barrage wall generate power as water flows in and out of the estuary basin, bay, or river. These systems are similar to a hydro dam that produces Static Head or pressure head (a height of water pressure). When the water level outside of the basin or lagoon changes relative to the water level inside, the turbines are able to produce power. The largest such installation has been working on the Rance river, France, since 1966 with an installed (peak) power of 240 MW, and an annual production of 600 GWh (about 68 MW average power).[citation needed]

Embankments seal a basin where it is not sealed by caissons.

Ebb Generation

Flood Generation

Two-basin Schemes

Environmental Impact

The placement of a barrage into an estuary has a considerable effect on the water inside the basin and on the ecosystem. Many governments have been reluctant in recent times to grant approval for tidal barrages. Environmental impacts of tidal plants in the United States are difficult to measure because there are currently no US tidal plants. However, through research conducted on tidal plants in other parts of the world, it has been found that tidal barrages constructed at the mouths of estuaries pose similar environmental threats as large dams. The construction of large tidal plants alters the flow of saltwater in and out of estuaries, which changes the hydrology and salinity and possibly negatively affects the marine mammals that use the estuaries as their habitat The La Rance plant, off the Brittany coast of northern France, was the first and largest tidal barrage plant in the world. It is also the only site where a full-scale evaluation of the ecological impact of a tidal power system, operating for 20 years, has been made.

French researchers found that the isolation of the estuary during the construction phases of the tidal barrage was detrimental to flora and fauna, however; after ten years, there has been a “variable degree of biological adjustment to the new environmental conditions”

Tidal Fences and Turbines

Tidal fences and turbines can have varying environmental impacts depending on whether or not fences and turbines are constructed with regard to the environment. The main environmental impact of turbines is their impact on fish. If the turbines are moving slowly enough, such as low velocities of 25-50 rpm, fish kill is minimalized and silt and other nutrients are able to flow through the structures [34] For example, a 20kW tidal turbine prototype built in the St. Lawrence Seaway in 1983 reported no fish kills [34] Tidal fences block off channels, which makes it difficult for fish and wildlife to migrate through those channels. In order to reduce fish kill, fences could be engineered so that the spaces between the caisson wall and the rotor foil are large enough to allow fish to pass through. Larger marine mammals such as seals or dolphins can be protected from the turbines by fences or a sonar sensor auto-breaking system that automatically shuts the turbines down when marine mammals are detected. Overall, many researches have argued that while tidal barrages pose environmental threats, tidal fences and tidal turbines, if constructed properly, are likely to be more environmentally benign. Unlike barrages, tidal fences and turbines do not block channels or estuarine mouths, interrupt fish migration or alter hydrology, thus, these options offer energy generating capacity without dire environmental impacts.

Sediment Movements

Fish may move through sluices safely, but when these are closed, fish will seek out turbines and attempt to swim through them. Also, some fish will be unable to escape the water speed near a turbine and will be sucked through. Even with the most fish-friendly turbine design, fish mortality per pass is approximately 15% (from pressure drop, contact with blades, cavitation, etc.). Alternative passage technologies (fish ladders, fish lifts, etc.) have so far failed to solve this problem for tidal barrages, either offering extremely expensive solutions, or ones which are used by a small fraction of fish only. Research in sonic guidance of fish is ongoing. The Open-Centre turbine reduces this problem allowing fish to pass through the open centre of the turbine.

Recently a run of the river type turbine has been developed in France. This basically is a very large slow rotating Kaplan type turbine mounted on an angle. Testing for fish mortality has indicated much lower mortality figures, less than 5%. This concept seems very suitable for adaption to marine current/tidal turbines also.

Energy Calculations

E =1/2 * A * p * g * h^2

h is the vertical tidal range,

A is the horizontal area of the barrage basin,

Example calculation of tidal power generation

Specific density of sea water = 1025.18 kg/m3

Mass of the water = volume of water × specific gravity

= (area × tidal range) of water × mass density

= 92 × 109 kg (approx)

Potential energy content of the water in the basin at high tide

=4.5 × 1012 J (approx)

= 4.5 × 1012 J × 2

= 9 × 1012 J

= 9 × 1012 J / 86400 s

= 104 MW

= 31 MW (approx)

Mathematical Modelling of Tidal Schemes

In mathematical modelling of a scheme design, the basin is broken into segments, each maintaining its own set of variables. Time is advanced in steps. Every step, neighbouring segments influence each other and variables are updated.

In these models, the basin is broken into large segments (1D), squares (2D) or cubes (3D). The complexity and accuracy increases with dimension.

Mathematical modelling produces quantitative information for a range of parameters, including:

* Water levels (during operation, construction, extreme conditions, etc.)

* Currents

* Waves

* Power output

* Turbidity

* Salinity

* Sediment movements

Global Environmental Impact

A tidal power scheme is a long-term source of electricity. A proposal for the Severn Barrage, if built, has been projected to save 18 million tonnes of coal per year of operation. This decreases the output of greenhouse gases into the atmosphere.

If fossil fuel resources decline during the 21st century, as predicted by Hubbert peak theory, tidal power is one of the alternative sources of energy that will need to be developed to satisfy the human demand for energy.

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Now it’s easy being green.

CarbonCure’s technology is an affordable retrofit to existing concrete plants that allows producers to recycle waste carbon dioxide (CO2) during production to make more environmentally friendly concrete.

How does the CarbonCure technology work?

Carbon dioxide is captured from the emissions of local industrial polluters by gas suppliers across the country. This purified and liquefied CO2 is delivered to CarbonCure’s concrete producer partner’s plants in pressurized tanks. The CarbonCure technology precisely injects the recycled CO2 into wet concrete while it’s being mixed. Once injected, the CO2 becomes chemically converted into a solid mineral and permanently captured within the concrete. The technology is integrated with the producer’s batching system and has no impact on normal operations, which means that CarbonCure’s customers can continue to supply the same high quality concrete products – only now they’re greener!

The CO2 tank (right) sits near the concrete mixer. CarbonCure’s proprietary technology precisely injects the CO2 into wet concrete while it’s being mixed.

What happens when CO2 is injected into concrete?

When CO2 is added to the concrete during mixing, the CO2 reacts with water to form carbonate ions. The carbonate then quickly reacts with calcium ions released from the cement to rapidly form nano-size calcium carbonate (limestone) minerals. The conversion of CO2 into solid calcium carbonate minerals means that the CO2 has become permanently bound within the concrete and will never be released back into the atmosphere.

CarbonCure Chemistry Infographic

Making nano-materials accessible and affordable

Nano-materials, in the form of extremely fine particles, are known to enhance the material properties of concrete but their use has been limited by production, process integration and cost barriers. The CarbonCure technology enables concrete producers to form well-dispersed nano-materials within their concrete in a practical and affordable way.

CarbonCure Nanoparticle SEM

Illustration showing the formation of calcium carbonate nanoparticles resulting from the addition of carbon dioxide to fresh concrete.

How does CO2 affect concrete?

The nano sized calcium carbonate minerals act as a nucleation site for the hydration reaction that gives concrete its strength. Ready mixed concrete producers see an average strength improvement of approximately 10% when comparing concrete injected with CO2 to the control. Masonry concrete producers see a neutral to positive affect on compressive strength. The improvement to compressive strength enables ready mixed concrete producers to optimize their mix design, which typically includes reducing cement content. On average, CarbonCure ready mixed concrete producer customers are able to reduce cement by 5-8% and maintain the original compressive strength, without affecting the concrete’s fresh properties.

Why does all this matter?

The production of cement creates about 5% of the world’s CO2 greenhouse gas emissions. The ability to reduce cement prevents additional CO2 from being produced. The concrete and cement industry is one of a select few materials in the world that has the unique ability to convert CO2 into a new product. When CO2 is introduced to concrete, it converts to a mineral and will never escape back into our atmosphere – because it no longer exists! Now, CO2 can be used to make better products!

Ask the expert!

Do you have a question about the science behind CarbonCure’s technology? Contact us!

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Thursday, 7 July 2016

Arvind Pandit-Survival Movies - The Product of the Crop and People That Did not Glow

It is a amazing rifle, and killt the bear that killt me. The Russians and Cubans have taken aspect of Colorado and are rounding people today up, whom they consider to be threats, into camps. This movie is thrilling to see but I under no circumstances certainly feel it was practical or supplied significantly in the way of survival value.

E book of Eli - Realisticness - C Survival Worth - C

Amusement part - B I felt Reserve of Eli with Denzel Washington and Mila Kunis was benefit the check out. The main character (Will Smith) and his dog endeavor to survive by way of this film even with the continuous possibility of zombies. I presume this motion picture, while remaining wearisome in some locations, felt amazingly affordable and confirmed the dreary outlook of the primary character (Viggo Mortenson) in a publish apocalyptic globe with no hope. This is the oldest film on my listing and also a one of the greatest. Also in a catastrophe ridden planet it demonstrates how there will be individuals that will get ability any way they see balanced. This is the story of Jon Muir and his pet dog that set up out on a excursion across Australia with only him, his pet pet, and what he could have on his handmade cart. This is a human being of the numerous survival motion images about the battle over belongings. If you get a possibility, undoubtedly verify out this documentary. The other challenge I really like about this movie, that quite a few other individuals have also expressed, is that when you complete observing this motion image, you feeling amazingly patriotic and content of the great folks right now that keep in the United States.

Mad Max/Road Warrior/Further than Thunderdome - Realisticness - D Survival Profit - D Amusement aspect - B

Mad Max, The Highway Warrior, and Further than Thunderdome are rather entertaining and pleasure survival films to appear at, but they are quite unrealistic. This film supplied pretty very good survival worth, and it taught me a issue pretty very important: in no way get in wild plants until eventually you know just what they are and if they are protected and audio to eat.

The amount of recognition of survival movies has genuinely designed around the former handful of of a very long time. I take into consideration this movie delivers you a photograph of how the dwelling conditions in prisoner camps experienced been. I assumed the Arvind Pandit lesson of having aware was the best survival worth it gave.

I am Legend - Realisticness - C Survival Benefit - B -

Leisure element - B This is a even more of the survival films that I imagine showed terrific emotion. This is a marvelous movement photograph that offered survival well worth in the way of outside the house residing, seeking and fishing. There are a lot of scenes in this film that have survival price, specially when they escape from the camp and have to stay outdoors and endure in the wild.. They badge by them selves the "Wolverines" and endeavor to obtain once again the land that was previously theirs. Anyway, I am lifeless. If you are a Christian or are non secular this is totally an essential film to see largely simply because it displays how persons these days can use faith and the Bible for exceptional as adequately as evil to thrust their have motives. I assumed this film provided decently genuine looking perception on what could materialize with a breakdown of modern society and a lot of yrs of lawlessness. This survival motion picture actually reveals you how crucial a companion is when you are lonely. I will say this movie has a person of the saddest scenes in any movie I have ever considered, which will make the full motion picture truly really worth observing. There truly was not substantially survival profit in these movies, but there are brilliant Arvind Pandit autos with a lot of kinds of weapons, which makes them entertaining.

The Postman - Realisticness - B Survival Value - C Leisure variable - B

I sense the opinions of this movie by critics do not give it justice. Even so, in the stop, this motion picture unsuccessful to exhibit the Bible or Christianity in a horrible mild. Into the Wild - Realisticness - A Survival Benefit - B Leisure part - B

Into the wild is the authentic survival tale of Christopher McCandless (Emile Hirsch) who presents up his typical each day daily life to roam the US and reside in Alaska. In this film, the United States is a genuinely many area with insignificant acquire. There is some survival well worth to this movie like setting up a fire or acquiring an abscessed tooth out with an ice skate. Mel Gibson stars as Mad Max, a guy who life in a set up apocalyptic world who also tries to increase lifetime for himself and some some others. The only difficulty is it is tough to learn and commonly highly-priced because of its rarity.

Zombieland - Realisticness - D Survival Price tag - D Satisfaction component - A -

This is truly a comedic tactic at the survival and zombie fashion. A group of superior schoolers get alongside one another and dwell in the woods. This survival film confirmed how necessary remaining educated of your environment is. The use of faith to tackle people today nowadays is what the antagonist (Gary Oldman) utilizes to attain electrical electricity. This is a fantastic appear to be at survival and has the greatest survival rate out of any of the survival motion photographs I have reviewed. When there is actually no realisticness or survival benefit to talk of it, is incredibly amusing. It illustrates how ingenious people today can be when they do not have the popular devices for survival.

Pink Dawn - Realisticness - B - Survival Value - B Pleasure component - A+

Pink Dawn is not just 1 of my favorite survival films, but also a one of my favourite flicks It has alternatively a range of stars suitable right before they ended up getting family members names (Patrick Swayze, Charlie Sheen, Lea Thompson and Jennifer Gray). This survival movement picture does not have tons of survival cost, but it nevertheless presents perception on the possibility of a nation or around the world epidemic.

Jeremiah Johnson - Realisticness - A

Survival Benefit - B Enjoyment element - B Jeremiah Johnson (Robert Redford) is just one of the incredibly best survival flicks. The principal character is involved in a industrial UPS form plane crash that leaves him stranded on an island with no other survivors. A great deal of individuals have absent yet again to a dark ages style of dwelling with no power, fairly insignificant laws, and a tyrant thug (Will Patton) trying to attain electrical electricity. This is an supreme experience motion picture that reveals how Christopher lived all by himself in the Alaskan wilderness with only what he could have on his again once again. The classes are: realisticness, survival rate and entertainment factor. It experienced a few locations that I consider gave it some survival price, but all spherical, it was just one particular of the entertaining survival movement photographs.

By itself All over Australia - Realisticness - A Survival Benefit - B+ Enjoyment variable - B+

This is survival documentary is not very effectively regarded, but on the other hand gives really great survival gain. I felt that this movie licensed me to comprehend that striving for pleasure and wishing to dwell existence to the fullest irrespective of dreadful circumstances is crucial to beating the prevent.

Survival Flicks, Most effective to the Worst!

Waterworld - Realisticness - D Survival Selling price - D Amusement aspect - C+

The Earth is now stuffed with consuming drinking water, but some people today believe there is continue to dry land on the earth. On the survival value entrance, I thought there had been some matter parts to purchase absent from the tale line that would be handy in accurate life-style. I have rated these movies in three one of a kind teams. Yours genuinely, Hatchet Jack." How can you not love this film with a scene like that? This movie is superb at depicting how to live off the land and be self - adequate.

Rescue Dawn - Realisticness - A Survival Value - B Amusement ingredient - C

This survival movie is the genuine tale of Dieter Dengler (Christian Bale), a German American fighter pilot whose plane is shot down all around Laos for the length of the Vietnam War and captured. Out of all the flicks I have at any time located, this film most likely has the saddest scene for the reason that what transpired in the movie was what transpired in authentic way of living. Other than the relevance of companionship, there have been only a numerous survival classes to be figured out.

Castaway - Realisticness - B Survival Worth - C Enjoyment part - B

Castaway, starring Tom Hanks, is a relations survival movie. Just after a virus wipes out approximately all individuals on the earth, a pair survivors arrive along with a person another to attempt and come across a secure spot to are living. These scores are all primarily based on my see so you may possibly not practical experience the very same.

The Road - Realisticness - A Survival Value - B Enjoyment element - C

Whilst I did not certainly truly feel this was just one of the survival motion pictures that lived up to my anticipations, I truly come to feel it thoroughly portrayed the psychological rollercoaster that an finish of the earth trouble would deliver. In my check out, 1 unique of the best cameos of all time normally takes position for the period of this movement image. As in quite a few movies, this is a struggle in in between the protagonist (Kevin Costner) and the antagonist (Dennis Hopper) and his cronies (discovered as the smokers). Each individual person of these is on a A - F Grading Scale with A remaining greatest and F remaining worst. Just observe and see!

28 Days Afterwards on - Realisticness - B Survival Truly worth - C Leisure variable - B

28 Days Later on is a survival movement photo starring Cillian Murphy (Batman Commences). This motion picture is about a man or woman who would like to reside as a hermit residing off the land, who desires to be left by you to do his have issue. In a solitary scene, Jeremiah Johnson finds a gentleman who has been ineffective for a though with a notice on him indicating, "I, Hatchet Jack, turning into of seem head and broke legs, do hereby leaveth my bear rifle to whichever finds it, Lord hope it be a white gentleman. This was a fairly substantial movie, but I significantly appreciated it and appreciated its perception of hope. Furthermore, it reveals how considerable possessing a stable - will is when you will have to have to get out of a seemingly lifeless complete circumstance. I picture it has excellent survival advantage and is genuinely acceptable. This was a superb film that portrayed what could appear about if an epidemic have been to distribute quite quickly. The protagonist (Kevin Costner), a drifter, finds a way to make a difference in the world even nevertheless he is initially only anxious about his incredibly very own livelihood and properly - getting. The only reason I noticed this was given that I attended a lesser neutral motion picture pageant in my town. For the duration of the motion picture, they all come collectively to assist just about every single other endure a zombie infested earth. This survival film stars Jesse Eisenberg, Woody Harrelson, and Emma Stone. The persons in this film finished up not all set to have religion in everybody all more than them, and they lacked the property vital to have on a regular life span, which could be an correct result in a precise societal breakdown

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Pappadellas - Fine Italian Restaurant

Pappadellas is a quaint little restaurant with very big tastes. Chefs Andreas and Luis have been creating and cooking authentic Northern Italian food for over 25 years.

Our chefs have such a great following because they cook from the heart to create such delicious entrees. Whether it’s on the menu or not, they will make anything your heart desires. Andres has many specialties but his “Handmade” pastas are what he is known for. They bake their own bread daily and whether it's lunch or dinner you feel as if you’re in their home enjoying their company.

Pappadellas offers on and off premise catering. Make your next event one they will remember with authentic, truly homemade Italian cuisine.


"Chess is the fastest game in the world, because you have to organize thousands of thoughts every second."
Albert Einstein

We offer you several chess tables where you can enjoy your chess games in a unique and peaceful environment.

Darts and more...

For fans of darts game we hung a dartboard. Arrows are also available.


What is MVC?

MVC stands for Model-View-Controller. It is a software design pattern which was introduced in 1970s. Also, MVC pattern forces a separation of concerns, it means domain model and controller logic are decoupled from user interface (view). As a result maintenance and testing of the application become simpler and easier.

MVC is one of three ASP.NET programming models. MVC is a framework for building web applications using a MVC (Model View Controller) design: The Model represents the application core (for instance a list of database records). The View displays the data (the database records).


Statix Statix
http://www.myspace.com/statixmusic For Bookings email: [email protected] NOT Static-X by any means. Introducing Statix. To put it simply, dubstep’s answer to Bad Company. Quite a title? With distinctive records such as ‘Mind Over Matter’ & ‘Purgatory’ shredding their way through the dubstep scene, it’s one that is definitely justified. Statix means …. Well, nothing actually, there isn’t a reason behind the name, although there is a reason as to why Statix contains 5 members.

Read more about Statix on Last.fm.
ჩემი დამთხვევები

მომხმარებლები, რომლებსაც მოსწონთ "Statix"


Davis Hall History

Opened: 1961

Susan B. Davis

1878 - 1952

Born in Milton, WI, Susan B. Davis received a B.A. from Milton College and an M.A. in speech from Northwestern University. She studied further at Harvard and the University of Chicago prior to her transition to the University of Wisconsin-Madison where she began her role as instructor in Speech during the 1924 summer term.

Davis served as Hostess at Barnard Hall from 1925 to 1926 at which time she was appointed lecturer in Speech and Assistant to the Dean of Women. From 1927 to 1941 Davis served as Dean of First-year women, and following a brief retirement fulfilled a role as Educational Counselor at the Truax housing project where she applied herself diligently to the task of brightening the lives of returning veterans from WWII and their families.

It was Davis’s belief that a better world comes through understanding and participation in community activities that fueled her organizational work in politics and love of public speaking. Davis supported the work of the Madison League of Women Voters, was a member of the National Education Association, an honorary member of Phi Beta professional speech sorority, and a former regent of D.A.R. Additionally, Davis distinguished herself by writing historical sketches and studies of Wisconsin, including Old Forts and Real Folks, Wisconsin Lore for Boys and Girls, and Our Wisconsin, a Pageant.

Given her name, this community commemorates a woman who deeply valued the pursuit of knowledge and the utilization of that knowledge to bring others together in support of the common good.

History of University Housing


Wendell Pierce on Sterling Farms and Sterling Express grocery and convenience stores to fight “Food Deserts” in New Orleans

A food desert is a district with little or no access to large grocery stores that offer fresh and affordable foods needed to maintain a healthy diet. Instead of such stores, these districts often contain many fast food restaurants and convenience stores. There are a few things that factor into food deserts are physical access, financial access or just an attitude of the customers in the surrounding area having little knowledge about nutrition or food preparation. In studies, food deserts disproportionately affect socially segregated groups in urban areas, specifically single mothers, children, and the elderly living in underprivileged urban neighbourhoods.

Families and individuals without a car (something that is particularly present in New Orleans) are also at a higher disadvantage in terms of their access to healthy food in food deserts. Wendell Pierce is out to change that in NOLA:

Listen to April D. Ryan, White House correspondent and American Urban Radio Networks podcaster talk to Wendell about Food Deserts below:

In response to a lack of access to quality fresh food in many post-Katrina New Orleans’ neighborhoods, Wendell Pierce along with 2 partners started a chain of grocery stores named Sterling Farms in 2012. The stores will be located in lower income neighborhoods that were underserved both prior to and after Katrina. Here is a background story that CBS did in 2012….This is the kind of stuff that we like to see. Here at TBC, we definitely like to post the ridiculousness that we see in the world today, but when we see something like New Orleans actor Wendell Pierce trying to help his hometown by making more grocery stores and fresh food available in under served neighborhoods, we definitely need to give that a shout out too. Using his celebrity and dollars to make a difference. We need more of this. Check out some of the reports about the store openings down here…

After a year in the making Marrero residents now have full service grocery store. Before hand, the area was known as a food desert with little to no access to fresh and affordable foods. This was all made possible because of a partnership between actor Wendell Pierce and New Orleans businessman Troy Henry.


Garden Center & Nursery - TREES & SHRUBS

Trees and shrubs can add beauty, interest, and value to your property.  Pine Tree offers a broad selection: evergreen or deciduous, native and ornamentals.  Blueberries and raspberries too.  And we proudly support local growers, so our trees are well-adapted to our climate and conditions.

Japanese MapleA plant's value to the property arises from both functional and aesthetic considerations. Trees are generally the most valuable plants in a landscape because they are the most useful. For example, they may function as screen from another property, wind blocks, or wildlife havens. Shade trees can reduce the cost of heating and cooling your home by 10 to 50 percent.

There are many things to consider when investing in trees and shrubs:

*  What is its purpose?  Screening?  Shade?  Focal point?  Seasonal  interest? *  What are the conditions of the area where you will plant it?  Wind?  Soil?  Moisture?  Other plantings? *  Always visualize its mature size and shape--how tall do you want it to grow? *  How wide?  Are there constraints, like electrical wires or structures nearby? *  How much time and attention are you willing to give it?  All trees require care, but some will need more pruning or spraying than others.

Your answers to these questions will help narrow down the list of trees and shrubs to consider.   Our staff is ready to help you find the perfect plant to meet your needs.