Curved Wall Build Pics

How To: Green Build A Curved Wall.
- Job Site Photos with Build Notes -
  • Step by Step Instructions for How to Build a Curved Wall.  
  • Project By Scotts Contracting, Custom Builder utilizing Green Building Techniques
View Final Photos Curved Wall Build Photos Click Here

Green Build Before Photo A

Curved Wall Before Photo B

Green Build Curved Wall Framing View.  Note: Metal Framing Conforms to Existing Structure

Curved Wall Green Build Exterior Sheeting

Curved Wall Exterior Sheeting- Build Note: 3" Relief Cuts

Green  Build Waterproofing

Curved Wall Installation of Mesh
Curved Wall with First Coat of Stucco
Final Photos View Here

Click here to Email Scotty for a Free Green Site Evaluation for the Construction of Your Next  Project


Scott's Contracting, Green Builder St Louis "RENEWABLE ENERGY" MO,: End of Month Solar Deals

Scott's Contracting, Green Builder St Louis "RENEWABLE ENERGY" MO,: End of Month Solar Deals

End of Month Solar Deals

See Current Prices at: www.stlouisrenewableenergy.com/solar

Super High 400, 300 and 200 Watt Glass Framed Amorphous Silicon Panels under $2.00 per watt

We also have 220 and 230 Watt Polycrystalline for under $1.95 per Watt that work with Enphase or most other Inverters.

Our Poly's have a Super high PTC ratings and ultra high efficiencies levels exceeding 17.5%

yes: 400 Watt, 300 Watt; 200 Watt Thin-Film Glass Solar Panels
Great for Commercial applications with full 25 year warranty

Also available with the Newest Matching Micro-Converters !!! **UL Listed**

  • Parallel architecture with constant voltage output over entire input power
  • Direct connection to solar panel MC connector; no additional panel wiring needed
  • Complete cable assembly with UL rated PV wire for connection to PV modules
  • Parallel system design for new unbeatable levels of maximum efficiency
  • Back Mounting Rails built into panel, save money on racking - ready for fast install
  • With Parallel configuration Up to 20% more kWh produced per watt over Serial Installations !!!
  • Plus up to an additional 15% higher output (kWh/kWp) compared to c-Si modules

Aide Solar XZST-180W Mono Modules with UL and SB1 Listings.
  • 5 year Product Warranty - Repair, replace, or refund.
  • 12 years Peak Power Warranty - 90% minimum peak power
  • 25 years Peak Power Warranty - 80% minimum peak power

 Complete Solar Kits 3.45kW to 12.65kW now available starting at $3.34 per Watt

 ** IMPROVED PRICING ON BULK ORDERS **Lock your order and Price Contact: scottscontracting@gmail.com


Wanted: 1 Slip Shade Cover as seen in pictures

wanted 1 Slip Shade Cover as seen above.  Contact Info: scottscontracting@gmail.com

Illinois' Green Energy Finance Initiative

March 2, 2010 Information Provided By, Scott's Contracting Green Builder, St Louis "Renewable Energy" Missouri

Illinois' Green Energy Finance Initiative

A recent initiative from Illinois may serve as a model for other states that hope to attract green energy projects and stimulate economic development.

by Marnin Lebovits, Illinois Finance Authority

There are plenty of reasons to encourage and support the development of renewable energy projects. But in this down economy, the credit markets are typically discouraging. Here in Illinois, we've found a way to open new doors to financing renewable energy projects because we know they're good business–and good for our state.

Like other states, Illinois recognizes the climate and environmental benefits from generating power from renewable energy sources. We know that developing these projects will reduce our region's dependence on foreign oil.

Renewable energy will also help to meet state renewable portfolio standard (RPS) targets. Illinois established its targets in August 2009 and requires that by 2025 one-quarter of all of the power used annually in Illinois must be generated from renewable energy sources. Of this amount, 75 percent of the renewable power used must be generated from wind projects. This requirement has created a significant interest in renewable energy projects, especially wind projects. Also, like other states our state wants, to the extent possible, to provide incentives to help reduce the cost of power generation from these projects so that savings can be passed on to ratepayers.

Finally, renewable energy projects will spur economic development and provide a secure revenue stream for many farmers and other property owners struggling during this recession. The projects will create jobs–many in depressed, rural regions of the U.S., where municipalities will also benefit from the increased tax revenue sparked by such development.
Challenges for Project Finance

Despite these benefits, developers typically face serious obstacles when they attempt to finance renewable energy projects. Capital markets continue to face severe challenges, and the ability for developers to obtain traditional project financing is much more limited than in the past. Only a handful of financial institutions will provide loans for renewable energy projects, including wind farms. Even then, the terms and conditions for the loans are quite arduous.

Most recent transactions include loan terms of only 5 or 7 years, with a 20-year amortization period, generating significant refinance risk in most cases. Developers with the ability to raise capital in other forms, either on a portfolio basis or through a rated parent entity, are forced to prioritize projects in different stages of development across the U.S. market and even around the world.

To better compete, the Illinois legislature created new financing tools to aggressively attract renewable energy projects to our state. The state's approach might serve as a model for others hoping to attract similar types of development.
The Illinois Solution

The Illinois legislature recently passed a bill adding renewable energy projects to the portfolio of developments eligible for assistance through the Illinois Finance Authority (IFA), which provides expert, hands-on support to help businesses get the capital they need for growth.

The IFA's assistance for renewable energy will come in the form of up to $3 billion of loan guarantees for project debt. This project finance can contain long-term tenors to fully repay the project debt, thereby eliminating the risk of refinancing. The loan guarantees will be secured by the state's moral obligation. While moral obligation is not a full faith and credit guarantee, it is a model that has been used extensively in the municipal finance markets, and it's used often in Illinois. As of September 2009, the State has outstanding debt (unrelated to this renewable energy finance initiative) of over $100 million using this model. Eight state agencies have the ability to issue moral obligation-supported debt totaling around $1.5 billion for local governments and economic development purposes. Clearly, this is an important funding tool.

These incentives will reduce a project's financing costs by an estimated 100 to 175 basis points. Combined with other incentives offered by the state, such as grant funding available from the Department of Commerce and Economic Opportunity for renewable energy projects, Illinois' incentive package is drawing attention from developers. In fact, the IFA late in 2009 was already reviewing a number of renewable energy projects for inclusion in this program in anticipation of the legislation's effective date, January 1, 2010.
Private Sector Debt Loan Guarantees

Under the first of three IFA funding models, a developer can work with its traditional project finance lenders and add the IFA as a partner, providing a "loan guarantee" to private sector lenders. The private sector lender would also have the support of Illinois' moral obligation pledge.

Lenders will need to first look to the renewable energy project revenues to cover the debt service. If the project doesn't generate enough revenue, the lender (or lead arranger bank for a syndicated loan transaction) may call in the IFA. The addition of the state's moral obligation may allow the private sector lenders to extend the term of their project debt, possibly even to fully amortize the debt (based upon the tenor of the power purchase agreement) and should help to reduce the cost of the private sector financing.

In a second financing model, the IFA would issue bonds secured by both project revenues and the state's moral obligation support. The IFA would then loan the bond proceeds to the project developer to pay for project construction. Again, the first repayment source for the debt service on the bonds is project revenues. Illinois will be called upon by the Bond Trustee to fund any debt service deficiency on a moral obligation basis. In this instance, the tenor of the bonds could be set to correspond to a final term that will be near the PPA maturity, fully amortizing the project debt. The bond investors will assume the project risk. However, investors will also benefit from the security of the guarantee of the State of Illinois on a moral obligation basis. This additional security will reduce the project's interest rate.
A Third Option

These two models can be combined with the private sector providing a loan for a shorter-term piece and bonds issued for a longer-term piece of the debt financing. For example, the IFA can provide a loan guarantee to private sector lenders on their shorter-term financing (also known as "Series A") and the IFA can be the lender, on a pari-passu basis (in other words, without partiality) for a "Series B" financing that will represent the debt's longer-term portion. The combination of the proceeds from the Series A and Series B financings will provide the total debt funding for the project, thereby reducing total debt service costs and eliminating the refinance risk of traditional private sector funding.

The U.S. Department of Energy (DOE) loan guarantee program for renewable energy projects requires a participating lender (either a financial institution or an economic development authority) to share risk with the DOE. Although the IFA intends to work with projects participating in the DOE program, it is not required.

To back its push for renewable energy projects the state created the Illinois Energy Team (IET) to help review environmental and technical aspects of renewable energy projects and help expedite project development. The IET includes specialists from the state university system, Argonne National Laboratory and state agencies such as the Illinois Finance Authority, the Illinois Power Agency, the Illinois EPA and the state Department of Commerce and Economic Opportunity. This panel reviews feasibility studies and reports, evaluates technology, and considers project siting, grid interconnection and environmental impact issues. The IET will also provide a forum for developers to work with various state agencies to help projects come to fruition.

The IFA has accepted program applications for three wind projects. Inquiries have come in from developers involved in virtually all renewable energy sectors, including wind, solar, clean coal, geothermal, biodiesel and biomass.

Marnin Lebovits joined the Illinois Finance Authority as a senior funding manager in August 2009 and helped create program guidelines and credit criteria. For the last 20 years prior to joining the IFA, he has been active in municipal and project finance, managing and actively participating in the municipal and project finance groups for both Sumitomo Bank and DEPFA BANK. Mr. Lebovits received his MBA from the Wharton School of the University of Pennsylvania and is a CPA.

For more information on this Illinois financing initiative, contact Mr. Lebovits at 312-651-1344 or mlebovits@il-fa.com.  Contact: scotty@stLouisrenewableenergy.com  for all your green building needs


Solar Water Heater, green ideas, eco conscious

Solar Water Heater

$1,000 to $5,000

While solar-heating costs are still high for most whole-house applications, heating water with the sun has become practical. For $2,500 to $3,500, installed, an active, flat-plate solar collector system will produce 80 to 100 gallons of hot water per day. The payoff: Your water-heating bills will drop by 50 percent to 80 percent. Plus, you'll be shielded from future energy price increases.

Green Space:

1.When Tom and Sheryl Stone set out to remodel their 900-square-foot condo, their goal was to make it as green as possible using materials that were recycled, renewable, or sourced from environmentally responsible companies.

2.The first renovation they made was removing the wall that separated the living room and kitchen. Removing the wall opened up the condo without changing its footprint.

3.Cork flooring was used throughout the space. Cork is a popular option for flooring especially in high-traffic areas because it's water- and mold-resistant. Cork is roughly the same price as wood, but it's a sustainable material. Cork trees regenerate every nine years, while trees such as oak or maple can take 30 years or more.

4.Storage was an important factor in this small space. Kristin Lomauro-Boom, the designer, carved out storage wherever she could. Among the more intriguing solutions were drawers that hide within the toe-kicks, and a tall tambour door. She also designed a niche for the TV on the living room side of the island. The table on wheels can also serve as additional counter space.

5.The Stones used compact fluorescent lamps in the green glass pendant lights above the island and the track lights throughout the kitchen. The CFLs uses less electricity than standard incandescent bulbs. Although they cost a little more, they last up to 10 times longer and can be installed in most light fixtures.

6. See Remaining Eco Friendly Ideas: http://www.bhg.com/home-improvement/remodeling/eco-friendly/real-life-eco-friendly-make-over/?page=6

Info Provided by: Scotty, Green Builder St Louis "Renewable Energy" Missouri


Highly Absorbing, Flexible Solar Cells

Highly Absorbing, Flexible Solar Cells
Supplied by: Scotty,Scott's Contracting, Green Builder, St Louis Renewable Energy.


Caltech Researchers Create Highly Absorbing, Flexible Solar Cells with Silicon Wire Arrays

PASADENA, Calif.—Using arrays of long, thin silicon wires embedded in a polymer substrate, a team of scientists from the California Institute of Technology (Caltech) has created a new type of flexible solar cell that enhances the absorption of sunlight and efficiently converts its photons into electrons. The solar cell does all this using only a fraction of the expensive semiconductor materials required by conventional solar cells.

"These solar cells have, for the first time, surpassed the conventional light-trapping limit for absorbing materials," says Harry Atwater, Howard Hughes Professor, professor of applied physics and materials science, and director of Caltech's Resnick Institute, which focuses on sustainability research.

This is a photomicrograph of a silicon wire array embedded within a transparent, flexible polymer film.

[Credit: Caltech/Michael Kelzenberg]The light-trapping limit of a material refers to how much sunlight it is able to absorb. The silicon-wire arrays absorb up to 96 percent of incident sunlight at a single wavelength and 85 percent of total collectible sunlight. "We've surpassed previous optical microstructures developed to trap light," he says.

Atwater and his colleagues—including Nathan Lewis, the George L. Argyros Professor and professor of chemistry at Caltech, and graduate student Michael Kelzenberg—assessed the performance of these arrays in a paper appearing in the February 14 advance online edition of the journal Nature Materials.

Atwater notes that the solar cells' enhanced absorption is "useful absorption."

"Many materials can absorb light quite well but not generate electricity—like, for instance, black paint," he explains. "What's most important in a solar cell is whether that absorption leads to the creation of charge carriers."

The silicon wire arrays created by Atwater and his colleagues are able to convert between 90 and 100 percent of the photons they absorb into electrons—in technical terms, the wires have a near-perfect internal quantum efficiency. "High absorption plus good conversion makes for a high-quality solar cell," says Atwater. "It's an important advance."

The key to the success of these solar cells is their silicon wires, each of which, says Atwater, "is independently a high-efficiency, high-quality solar cell." When brought together in an array, however, they're even more effective, because they interact to increase the cell's ability to absorb light.

"Light comes into each wire, and a portion is absorbed and another portion scatters. The collective scattering interactions between the wires make the array very absorbing," he says.

This is a schematic diagram of the light-trapping elements used to optimize absorption within a polymer-embedded silicon wire array.

[Credit: Caltech/Michael Kelzenberg]This effect occurs despite the sparseness of the wires in the array—they cover only between 2 and 10 percent of the cell's surface area.

"When we first considered silicon wire-array solar cells, we assumed that sunlight would be wasted on the space between wires," explains Kelzenberg. "So our initial plan was to grow the wires as close together as possible. But when we started quantifying their absorption, we realized that more light could be absorbed than predicted by the wire-packing fraction alone. By developing light-trapping techniques for relatively sparse wire arrays, not only did we achieve suitable absorption, we also demonstrated effective optical concentration—an exciting prospect for further enhancing the efficiency of silicon-wire-array solar cells."

Each wire measures between 30 and 100 microns in length and only 1 micron in diameter. “The entire thickness of the array is the length of the wire,” notes Atwater. “But in terms of area or volume, just 2 percent of it is silicon, and 98 percent is polymer.”

In other words, while these arrays have the thickness of a conventional crystalline solar cell, their volume is equivalent to that of a two-micron-thick film.

Since the silicon material is an expensive component of a conventional solar cell, a cell that requires just one-fiftieth of the amount of this semiconductor will be much cheaper to produce.

The composite nature of these solar cells, Atwater adds, means that they are also flexible. "Having these be complete flexible sheets of material ends up being important," he says, "because flexible thin films can be manufactured in a roll-to-roll process, an inherently lower-cost process than one that involves brittle wafers, like those used to make conventional solar cells."

Atwater, Lewis, and their colleagues had earlier demonstrated that it was possible to create these innovative solar cells. "They were visually striking," says Atwater. "But it wasn't until now that we could show that they are both highly efficient at carrier collection and highly absorbing."

The next steps, Atwater says, are to increase the operating voltage and the overall size of the solar cell. "The structures we've made are square centimeters in size," he explains. "We're now scaling up to make cells that will be hundreds of square centimeters—the size of a normal cell."

Atwater says that the team is already "on its way" to showing that large-area cells work just as well as these smaller versions.

In addition to Atwater, Lewis, and Kelzenberg, the all-Caltech coauthors on the Nature Materials paper, "Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications," are postdoctoral scholars Shannon Boettcher and Joshua Spurgeon; undergraduate student Jan Petykiewicz; and graduate students Daniel Turner-Evans, Morgan Putnam, Emily Warren, and Ryan Briggs.

Their research was supported by BP and the Energy Frontier Research Center program of the Department of Energy, and made use of facilities supported by the Center for Science and Engineering of Materials, a National Science Foundation Materials Research Science and Engineering Center at Caltech. In addition, Boettcher received fellowship support from the Kavli Nanoscience Institute at Caltech.

Lori Oliwenstein


Reduce U.S. Petroleum Consumption

Info Provided by Scotts Contracting, Green Builder St Louis Renewable Energy
March 10, 2010

Report Emphasizes Need to Reduce U.S. Consumption of Petroleum
The price of oil is currently hovering near $80 per barrel, but that doesn't include the potential economic costs to the United States that would be caused by disruptions in oil supply, according to a recent discussion paper by Resources for the Future (RFF), an independent research group. That report estimated the oil security premium for domestically produced oil at about $2.28 per barrel in 2008, rising to $4.45 by 2030, in constant 2007 dollars. In contrast, the oil security premium for imported oil starts at about $4.45 per barrel in 2008 and rises to $6.82 by 2030. While that analysis suggests that emphasizing domestic oil production over foreign imports has some advantages, the authors note that the security premium is minor compared to the current and future direct costs of oil, which the authors project to increase to more than $130 per barrel by 2030. Given that high price, the report concludes that the best policy would be to emphasize reductions in U.S. petroleum consumption, regardless of the source of oil. See the RFF summary and the full discussion paper (PDF 497 KB).

This is an excerpt from EERE Network News, a weekly electronic newsletter.

Plywood vs OSB pros and cons

Greening the Shell

How plywood and OSB stack up in the search for sustainable sheathing.

Supplied by: Scott's Contracting, Green Builder St Louis "Renewable Energy" Missouri By:Fernando Pages Ruiz

Back when I started framing houses, subfloor and sheathing choices were limited to solid, spaced sheathing and a still relatively new building product, plywood. The latter was gaining market share, but many old-timers resisted the thin, bendable, sometimes delaminating sheets of cross-grained veneer.

But eventually not a single floor, wall, or roof had anything but plywood over the joists, studs, and rafters, and today the same could be said for oriented strand board (OSB). Just as with plywood, some builders regarded OSB suspiciously before it became well established.

Today, a new generation of sheet materials is pushing this category toward new levels of performance, with products made from more durable raw materials and healthier resins, and panels that combine features that address moisture control, air infiltration, and energy performance in addition to their structural functions.

Before we explore these alternatives, let’s review the pros and cons of the old warhorses, plywood and OSB, as the former has made a comeback among quality-conscious builders, and concerns over deforestation and indoor air quality have muddled the question of sheathing with either plies or strands.


Plywood consists of an odd number of sheets of wood, glued together with the grain of each ply in a perpendicular direction, to create a structural panel with shear strength in all directions. Plywood’s cross-grain provides strength and greater holding power for screws and nails than solid-sawn wood.

Oriented strand board (OSB) uses a similar engineering principle, but instead of creating the multidirectional structure with large sheets of wood glued together, manufacturers of OSB arrange small strands of wood (2 to 3 inches in length) into a cross-grain pattern, and then bind them into a solid, structural panel using adhesives, pressure, and heat.

From an environmental perspective, the notable difference between the two panel products comes with the natural resources required to make them. The sheets of lumber used to make plywood are peeled in thin veneers off a log with a sophisticated lathe. The logs are older and larger, and from a more limited number of tree species, than those shredded for strands of OSB. Also, the plywood peeling process leaves a spindle of wood at the center, whereas manufacturers of OSB shred the entire log.

Green building certification agencies recognize the ecological advantage of engineered lumber products, principally OSB, which is used not only to make sheathing, but also joists, rafters, and substitutes for dimensional lumber.

Nevertheless, plywood has maintained its place and has seen some gains because of its greater resistance to moisture, especially around the edges, and slight advantage in nail- and screw-holding power. Many flooring and some roofing manufacturers prefer plywood under their products because of its greater stability versus OSB in humid conditions. Miami-Dade County, Fla., prohibits the use of OSB roof sheathing, given a comparatively high failure rate once wetted during historic storms.

With the exception of Miami-Dade, all national and international building codes regard plywood and OSB as equal, and use the generic phrase “wood structural panel” to clearly denote that the code recognizes these two materials on par. The leading green certification agencies, the USGBC and the NAHB, provide points for both products.

Both products carry similar performance-based certifications, primarily from APA-The Engineered Wood Association, and the U.S. Department of Commerce Voluntary standard for Wood Based Structural Panels (PS1 and PS2) that allow consumers and inspectors to know the exposure (outdoor, indoor, or marine), strength (structural capacity), span rating over framing members (adequate for 16, 24, 32 inches on-center), surface finish quality, and, more recently, compliance with air-quality standards.

But OSB has become the clear leader in construction not so much for its ecological as economic advantages: OSB is generally several dollars per sheet cheaper.

News reports of formaldehyde concentrations in mobile homes provided to victims of Hurricane Katrina has made builders concerned about the softwood, exterior structural panels used to sheathe walls, floors, and roofs. But the moisture-resistant glues used to make exterior sheathing in the U.S. do not contain urea formaldehyde, the adhesive that has created indoor air quality concerns. According to Marilyn LeMoine, spokesperson for the APA, all of the exterior, structural panels manufactured in the U.S. today comply with or are exempt from the California Air Resources Board (CARB) Air Toxic Control Measure for Composite Wood Products, arguably one of the world’s most stringent standards regulating toxic off-gassing from building materials.

Most OSB and many plywood panels use the adhesive diphenylmethane diisocyanate (MDI) as a binder, which contains no formaldehyde and no ecological risks, says LeMoine. Some plywood and OSB contain binders made from phenol formaldehyde, which becomes stable during processing and results in such low emission levels in the finished material that these products remain exempt from all formaldehyde emission standards.

The statement “no added formaldehyde” in a wood product may sound like a hedge, but it is only because wood itself contains small measures of formaldehyde. It’s all around us, as natural as air and water. You just don’t want to breathe too much of it. How much is too much? No one knows, and hence the effort to avoid products that raise the concentrations of formaldehyde indoors beyond the background levels found naturally outside.

Some foreign-made, exterior-grade panels allegedly contain unsafe levels of formaldehyde; buying trademarked panels stamped with the U.S. Product Standard PS1 (plywood) or PS2 (OSB) ensures that you are not adding measurable risk. Panels with an APA stamp comply with the CARB standards.

Beyond the structural stamps, plywood and OSB are available with certifications that confirm the product comes from a reputable source and sustainably managed forests. Although many forests are sustainably managed, the only way to provide credible proof is through independent, third-party auditing such as from FSC or SFI. Once the wood leaves the forest, a third-party, chain-of-custody certification monitors that the wood harvested is indeed the wood received by the end-user.

USGBC’s LEED program only gives points for FSC certification, but is currently considering including others; the ANSI National Green Building Standard and many other programs provide points for either.

From a green building perspective, the most interesting developments in sheathing can be found in some new products that integrate structural features with other components, such as insulation or weather-resistive barriers.

Dow’s SIS panels, for example, combine structural lateral bracing, insulation, and a water-resistive barrier. Huber Engineered Woods’ ZIP System roof and wall sheathing offers structural panels with a proprietary coating that acts as a weather barrier.

Innovative products also are helping to stiffen floor systems and reduce squeaks. AdvanTech from Huber features advanced resins for greater water resistance than commodity OSB and plywood, according to the company, as well as greater design bending strength and stiffness.

Weyerhaeuser’s iLevel Edge and Edge Gold floor sheathing products offer similar higher performance in structural stiffness and moisture resistance.

And while roof sheathing with integral reflective radiant barriers isn’t that new, its use is growing in hot, sunny climates where solar heat absorption from roofs can really crank up cooling loads.

Various brands of fiberboard sheathing, once used as cheap filler between structural panels, now have rebranded themselves as ecological, energy-efficient, and mildly structural sheathing systems. Homasote 440, a product originally designed for sound attenuation, is being repurposed as a high-performance exterior sheathing panel made from nearly 100% post-consumer recycled cellulose fiber with a maximum shear strength of 309 pounds per square foot (compared to let-in bracing at 245 pounds).

Manufacturers are offering or exploring a number of resource-efficient sheathing alternatives, such as ERT4C’s Eco-sheet, a European plywood replacement made from a mix of recycled polymers and other recycled materials including waste electrical and electronic equipment.

And researchers at Canada’s Alberta Research Council are developing an oriented structural straw board (OSSB) product, but because of straw’s small, relatively weak fibers, this option has so far proven difficult and expensive to produce as a structural product. This group is planning to open an OSSB plant in partnership with a private manufacturer.

The sheathing category is clearly evolving quickly, driven by our expanded knowledge of building science and the technical innovations manufacturers are bringing to their products. There are some great new options for green builders these days, and I am sure we’ll see even more in the years to come.

Contact: Scott's Contracting for your Green Building Needs

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