Archive

Posts Tagged ‘solar’

Interesting links for August 18th through August 24th

August 25th, 2010

These are my links for August 18th through August 24th:

  • Stanford engineers’ new solar energy conversion process could revamp solar power production - "A new process that simultaneously combines the light and heat of solar radiation to generate electricity could offer more than double the efficiency of existing solar cell technology, say the Stanford engineers who discovered it and proved that it works. The process, called "photon enhanced thermionic emission," or PETE, could reduce the costs of solar energy production enough for it to compete with oil as an energy source."
  • Dilbert Creator Scott Adams Tries to Build an Eco-Friendly House - WSJ.com - Slightly concerned that Sott Adams couldn't leverage his fame to get some decent advice for his self build, but then this article wouldn't have been so entertaining: "The greenest home is the one you don't build. If you really want to save the Earth, move in with another family and share a house that's already built. Better yet, live in the forest and eat whatever the squirrels don't want. Don't brag to me about riding your bicycle to work; a lot of energy went into building that bicycle. Stop being a hypocrite like me."
  • NewEnergyFocus.com - FiTs data shows “surprise uptake” by commercial sector - "The most up-to-date figures from Ofgem show that between the scheme going live and today (August 9), there have been 5040 installations, with 4969 of them residential, 57 commercial and 13 community installations. Of these, 13 were hydro, 142 wind and 4885 solar PV and the total installed capacity totals 21.9MW."
  • INSIGHT: Save What’s Left: Architects as Stewards of Our Planet - "I am not arguing for mindless, indigenous architecture and the elimination of the architectural profession; I am arguing for a new adaptive architecture that clearly understands its regional setting. Our simple goals could be to reduce the consumption of energy in the building sector by 50% in the next 15 years, and then achieve energy neutrality in the built environment 10 years later. These achievements might be analogous to the Manhattan Project or to landing on the moon before the Soviets. The new focus on regionalism and energy conservation would be accompanied by a new attitude toward nature and the landscape, an attitude that seeks to conserve and reintroduce native species and native landscapes."
  • Home | VELUX - via Rory Bergin's blog, a tool for modelling energy for domestic properties
  • Op-Ed Contributor - Math Lessons for Locavores - NYTimes.com - excellent, though US-centric article on the absurdities of locavorism. Single issue arguments do annoy me.
  • 500 Internal Server Error - 500 Internal Server Error
  • bere:architects » Blog Archive » First Welsh Passivhaus prototype – Fenestration Calculations & Cost Data - Hats off to bere:architects for publishing such a wealth of cost data. Lots of useful graphs and data.
  • London Housing Design Guide - London Development Agency - "The Mayor’s London Housing Design Guide sets a new benchmark for housing in the capital and will soon be a requirement for publicly-funded homes. By consolidating and simplifying a comprehensive set of standards, the guide aims to provide consistency and clarity about what is expected in London from the outset of a development. The standards are anticipated to be taken forward across all tenures through the Mayor’s forthcoming draft Housing Supplementary Planning Guide (SPG)."
  • Boris the builder: The Mayor’s vision for London housing | Life & Style - "Since 1980 there have been no mandatory minimum space standards for housing in the UK, ever since the famous Parker Morris standards for Space in the Home, which were drawn up in 1961, were abolished by Margaret Thatcher's government in 1980. This has led, in recent years, to London having the smallest new houses and apartments of any major city in the Western world — and this at the end of an era of huge economic growth and rises in living standards. A new apartment in London now is estimated to have up to 30 per cent less space than its equivalent of 40 to 50 years ago. The new guide contains 90 standards that will apply from next year on all new housing built on London Development Agency-owned land, or any developments funded by public money. More excitingly, it is hoped that the guide will be part of the updated London Plan after 2012, and as such will be planning policy — meaning it will cover all new housing in the private sector, too."
  • grid carbon will stay high for some time yet « carbon limited - "the official line is that the carbon intensity of the grid will remain roughly steady until 2015, when it will plummet towards near-zero carbon in 2040. (As an aside, is it a coincidence that the dropoff comes in 2015, given that it’s the latest possible date for the next general election?) It will be interesting to see how that drop off moves in coming years. The announcement strongly reinforces the message from DECC that decarbonisation of heat will not be achieved through electrification. In other words, heat pumps are not the answer to decarbonising heat at the national scale."

admin News , , , , , , , , , , , , , , , , , , ,

Interesting links for November 27th through December 2nd

December 4th, 2009

These are my links for November 27th through December 2nd:

  • Smart Vendors: Biomass Supply Chain (UK) - Innovation & Cleantech - Possibly interesting (but very expensive - £150!) report on biomass (not sure how independent the authors are?): "The future evolution of the UK biomass supply chain will be significantly impacted by the opening of proposed major biomass power generation plants by firms like Drax Power and Prenergy in the next 3 years."
  • Debt storm threatens Dubai’s ambitions | Last Word | MEED - The most understandable commentary on Dubai which I have come across this week: "Dubai World has gone into a form of protective bankruptcy, similar to the US’ chapter 11 arrangements. It is a situation fraught with difficulties that could damage Dubai and the UAE. And the true scale of what Dubai owes is still unknown.
    But it is Dubai World’s creditors that face the biggest immediate problem. None can expect to receive any money until Dubai World’s assets and liabilities have been fully assessed, a judgement made about how big the gap between the two is and a schedule defined for when creditors will be paid, and how much. It is tough, particularly for those who are owed money today. But it is fair."
  • Regulation shapes revolution in Gulf sustainable buildings | Last Word | MEED - Interesting summary of green building accreditation throughout the Middle East. Will the Dubai ripples have an impact?:
    "Abu Dhabi’s new building code, regulations that make sustainability compulsory in all buildings and major retro-fits throughout the emirate, come into force on 1 January 2010."
  • First Net-Zero Neighborhood in the US Being Built in Boulder | Inhabitat - At last, some aesthetically pleasing (to my eye at least) net zero homes in my favourite US city, Boulder. Still enormous compared to the UK - 280m² for a townhouse is 3.5 times larger than the average new build UK home (76m² according to swing a cat):
    "Located on Broadway and Poplar Ave in Northern Boulder, the 1.5 acre neighborhood is conveniently located across from a market, shops and restaurants and with easy access via bus to the rest of the city. Six townhomes border Broadway, while six single-family homes sit back behind around a communal park. All the homes will be orientated to the south and photovoltaic systems can installed on the roof, which will completely provide the homes with all the energy they need."
  • Rebooting Britain: transform cities into lush jungles - Another article from Wired. This time, I have to disagree slightly - IMO London is currently the *only* UK city suitable for walking and public transport?: "Cities are at present vulnerable to the smallest interruptions in oil and gas supply. The first step in cutting this dependency should be a ban on private car ownership in metropolitan areas. Even a sprawling city like London can be comfortably navigated by walking, cycling, and use of public transport - powered, like delivery vehicles servicing businesses and homes, by batteries, biofuels, or hydrogen fuel cells. The great tidal flows of commuters could be reduced by rezoning commercial areas for residential use and introducing workshops and offices into residential areas, as in the human-scale, mixed-use street plans of medieval cities."
  • Rebooting Britain: tax people back into the cities - Really looking forward to PD Smith's new book. Here a flavour from Wired UK: "To create a low-carbon economy we need to become a nation of city dwellers. We tax cigarettes to reflect the harm they do to our health: we need to tax lifestyles that are damaging the health of the planet - and that means targeting people who choose to live in the countryside. We need a Rural Living Tax. Agricultural workers and others whose jobs require them to live outside cities would be exempt. The revenue raised could be used to build new, well-planned cities and to radically upgrade the infrastructure of existing cities."
  • When provided a choice, do people choose? - The Social Enterprise - Suw is spot on about adoptation of social media within companies (my experience on Yammer and Skype backs this up): "The successful implementation of social software doesn't stop with a technically successful roll-out. In fact, that's when the process begins because that's when your adoption strategy should kick in.
    Adoption is ultimately about behaviour change: persuading people that, for example,
    instead of sending an email to everyone with a new version of a document they are working on, they should put it on a wiki where it's easier to collaborate. This might seem like a small step - and for a few people it is - but for the majority that's a fundamental change to the way that they have learnt to work on documents."
  • Gordon Brown’s ‘eco town’ vision quietly shelved - Times Online - "Gordon Brown’s vision of establishing distinct “eco towns” across the country has been quietly shelved, it emerged today.
    The Government tried to keep up the project’s momentum by announcing a further 14 locations where “green developments” have local council backing.
    But it became clear the new sites will not be for the self standing towns of up to 15,000 homes originally envisaged by the Prime Minister.
    Most will be developments of no more than 5,000 homes on the edge of urban areas, which will be cheaper, easier to plan and attract much less local opposition than those first proposed by the Government."
  • Futerra Sustainability Communications - Conspiracies, Climate and Communication - More climategate fallout - Solitaire from Futerra defends her position (well said): "So in my own voice I want to get one thing straight; I hate climate change. I really really hate it and wish it wasn’t happening. Some of the climategate posts seem to imply we’re part of a ‘pro’ climate conspiracy. Considering how deeply and passionately I wish the darn thing wasn’t happening that accusation left me fish-mouthing in surprise. I don’t want climate change, I don’t like climate change, and I’m bloody annoyed that my best years will be spent trying to combat the darn thing.
    The horrible irony is how much I want the deniers to be right. If I had one wish it would be for climate change to be untrue, a blip, misread data, to slope off in embarrassment. If only."
    Now, can we stop being distracted by the semantics and arguments and get on with some design? Thank you.
  • CRED Guide | The Psychology of Climate Change Communication - Via Joanna Yarrow, a fascinating document on communicating climate change. Niggets include: "balance information that triggers an emotional response with more analytic information to leave a mark in more than one place in the brain."
  • A Climate Scientist Who Engages Skeptics - Dot Earth Blog - NYTimes.com - Read the whole article: "In grappling with this issue, I would argue that there are three strategies for dealing with skeptics…
    Most scientists retreat into the ivory tower. The CRU emails reflect elements of the circling of wagons strategy. For the past 3 years, I have been trying to figure out how to engage skeptics effectively in the context of #3, … Some of the things that I’ve tried in my quest to understand skeptics and more effectively counter misinformation include posting at skeptical blogs, such as climateaudit, and inviting prominent skeptics to give seminars at Georgia Tech. I have received significant heat from some colleagues for doing this (I’ve been told that I am legitimizing the skeptics and misleading my students), but I think we need to try things like this if we are to develop effective strategies for dealing with skeptics and if we are to teach students to think critically."
  • The Guardian - Poignant and depressing: "But I find I can't say this stuff anymore; not because I have stopped believing in climate change, but because I have stopped believing we can prevent it.
    Which is not to say that the End Times are here. One of the other problems with the climate change narrative is that it offers only two futures: Saving the World, or Apocalypse Now. We will probably get neither. More realistic is that we will experience what most previous human societies experienced – a painful decline after a period of over-expansion. We hear a lot about the year 2050: it is a handy date on which to hang our hopes of a "sustainable society", which has come to mean business as usual but without the carbon. It seems much more likely that by 2050 we will be mining our landfill sites for valuable metals and struggling to keep the electricity on, while we dream of the coral reefs that once flowered in the emptying oceans."

admin News , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Interesting links for May 26th through June 1st

June 2nd, 2009

These are my links for May 26th through June 1st:

  • Concentration Solar Power Module Integrates Into Side And Roof Of Buildings - min-CSP - intriguing but no data in the article to back up the theory: "The system, of which the international patent has already been requested, consists of a stationary lens and a linear absorber plate that concentrates sunlight to generate energy. This concentration system reduces the space that until now was needed with traditional plates, which move around in search of sunlight"
  • UK Climate Impacts Programme - Socio-economic scenarios - Getting quite old now (Feb 2001) but sets forward 4 potential scenarios for socio-economic situations against which climate change will play out in the UK :
    1. National Enterprise
    2. Local Stewardship
    3. World Markets
    4. Global Sustainability
    At 140 pages, it's not a quick read, but useful resource.
  • A glimpse of the future as 56% of surveyors see workload fall (Brickonomics) - More sound commentary from Brian: "But for all the figures on workload, the two bits of data that will probably reflect most the long-term effects of the recession are those for employment and for profit margins. Both continue to look grim.
    It may sound like a management course cliché but one of the biggest weaknesses of the construction industry is one of its biggest strengths, its flexibility.
    And this weakness is exaggerated by the easy willingness of firms to work at below cost.
    My recollection of the 1990s recession was the less damage was done by falling workloads, which the industry's flexibility can absorb without huge stresses, than was done by winning work below true cost or at unsustainable thin margins."
  • Monbiot.com » How Much Should We Leave in the Ground? - I had wondered about this before - good to see George has done the math for me: "Even ignoring all unconventional sources and all other greenhouse gases and taking the most optimistic of the figures in the two Nature papers, we can afford to burn only 61% of known fossil fuel reserves between now and eternity." This would result in a 2ºC rise in temperature. Adaptation, here we come…
  • Monbiot.com » Crash Landing - Monbiot being unusually level headed: "we were told by both the airline companies and the Confederation of British Industry that business flights were necessary and non-negotiable: civilisation would collapse if executives weren’t able to fly whenever and wherever they wished. The government repeated this creed, insisting that the UK economy was dependent on the expansion of Heathrow. Now we learn that these are the first expenses to be cut when a contraction begins. Businesses are discovering that there are other means of engaging with people overseas, such as email, video-conferencing and an outlandish new device called the telephone."
  • ACE - If we can’t count the buildings, how can we plan cuts in emissions? - There's an elephant in the room, and his name is data: "There is no definitive data showing precisely what the carbon footprint of Europe's buildings is. So we can have no confidence we can identify precisely what percentage of the carbon dioxide emissions by end use comes from space heating as opposed to water heating, lights and appliances as opposed to cooking."
  • Why Has Globalization Led to Bigger Cities? - Economix Blog - NYTimes.com - Great article on cities with a slant on India: "The right response to the problems of megacities is not to get misty-eyed about village life, but rather to work to improve the quality of infrastructure in those growing urban areas."
  • FT.com | The Undercover Economist | Dear Economist: Can you help me to stop procrastinating? - How to cope with procrastination: "The behavioural economists Dan Ariely and Klaus Wertenbroch conducted an instructive study of procrastination with three groups of students at MIT. Each group had to complete three assignments over the course of the 12-week course. The first group had a separate deadline for each paper, after four, eight and 12 weeks. The second group had no intermediate deadlines: all three papers were due at the end of the course. Students in the third group were asked to impose their own deadlines.
    Students with well-spaced deadlines – those in the first group and a subset in the third who had spaced out their deadlines – tended to achieve the highest grades. Students who had assigned themselves no intermediate deadlines, or had been assigned none, fared poorly."
  • A new era for public health? « - "Yet one group of very important people now admit they too have neglected the issue. The latest edition of The Lancet – probably the world’s leading medical journal – says health professionals “have barely begun to engage with what should be the focal point for their research, preparedness planning and advocacy”. Now doctors see climate change as “the biggest global health threat of the 21st century”.
    The Lancet calls for a “new public health advocacy movement” to usher in an unprecedented era of co-operation between widely divergent spheres such as disease, food, water, sanitation, shelter, settlements, extreme events, population and movement.”"
  • Prince fails on sustainability - Building Design - A bit late getting to this one - Amanada takes on Charles: "This is where the speech unravelled for in making out “experimentation” to be a terrifying leap in the dark rather than something good based on hypotheses and a body of knowledge he came across as an intellectual Luddite, whose only solution is to retreat into a Hobbit-like world of organic earthy buildings and no cars."
  • Carbon-effective refurbishment - Modern Building Services - Ant Wilson calls for an integrated approach to refurbished buildings: "At the same time, the lower metre could be well insulated and fitted with photovoltaics (PVs) and internally lined with phase-change boards. Emerging concentrated photovoltaic energy generation (CPV has around 1000 times less embedded energy than conventional PVs, and its price is falling rapidly, which will improve the cost-effectiveness of building-integrated PV in coming years."

admin News , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Interesting links for March 11th through March 15th

March 17th, 2009

These are my links for March 11th through March 15th:

  • The Building Futures Game - Building Futures - The Building Futures Game is the outcome of 3 years research and development work carried out by the Building Futures team, CABE and architectural practice AOC. The toolkit emerged through a shared desire as to how one might enable communities to think about the future of their neighbourhood, while providing stakeholders with an interactive and alternative way of consulting with a wide variety of groups on their concerns and aspirations.
  • Disney Aims for Zero Carbon Emissions, Zero Waste in New Environmental Goals | GreenerBuildings - "The corporate responsibility report lays out seven long-term environmental goals for the company:
    • Zero waste.
    • Zero net direct greenhouse gas emissions from fuels.
    • Reduce indirect greenhouse gas emissions from electricity consumption.
    • Net positive impact on ecosystems.
    • Minimize water use.
    • Minimize product footprint.
    • Inform, empower and activate positive action for the environment"
  • T-Zero - "T-ZERO is a free internet tool that provides independent sustainable refurbishment advice to users, with the option of linking directly to the suppliers, manufacturers, and installers of any measures you choose. It is designed for those refurbishing their own homes, homes they manage, or the homes of clients, taking you through a series of simple steps."
  • How to Grow Your Own Fresh Air - TED 2009 « GreenSpaces Blog - More 'healthy' plants (I'm slightly obsessed with the original NASA study - spider plants are *good*). Mother in Law's tongue for bedroom, and Areca Palm for living room.
  • Welcome to YouCanPlan - via Be2Camp and then EcoBuild: "Our idea is based on the concept of ‘enabled self procurement’ or ESP to help build new sustainable communities. ESP is a process where future residents of communities are supported as the developers of their own homes, combining the choice of self build with the efficiency of speculative development."
  • Green for go: sustainability in the JCT contract - Building - "Following an industry-wide consultation, it published Building a Sustainable Future Together, a guidance note which is principally concerned with how sustainability in design and construction is provided for in contract documents. It also includes new contract clauses that extend those currently in JCT contracts, such as the Framework Agreement. The two principal new clauses are:
    1) The contractor is encouraged to suggest economically viable amendments to the employer's requirements which, if instructed as
    a variation, may result in improvement in environmental performance in the carrying out of the works or of the completed works
    2) The contractor shall provide to the employer all the information that he reasonably requests regarding the environmental impact of the supply and use of materials and goods which the contractor selects."
  • A second look at solar power on roofspace « lightbucket - Lightbucket doesn't blog often, but when he (she?) does, they're worth reading.
    "Averaged over the year, rooftop PV can exactly match England’s electricity sales, but there is a huge seasonal variation. During the summer, PV output is higher than the full-year average, but electricity demand is lower, so PV can supply more than twice the total demand. The situation reverses in midwinter. In December, the month of lowest insolation, rooftop solar PV can meet only 20% of electricity demand. Additional capacity will be needed to meet winter demand. Energy storage technologies can smooth out variations in output over a 24-hour timecale, and maybe longer, but certainly not over 6 months.
    If we had solar photovoltaics on all roofspace in England, we could comfortably meet England’s summertime electricity use, but only a fifth of wintertime electricity use."
  • Ten things to manage in a recession: 4 - executive costs « pwcom 2.0 - Paul illustrates Charles Handy's 'Hollywood' model perfectly: "… some AEC professionals have already opted to work as freelances or as independent consultants, undertaking a succession of contracts of their own choice instead of working for an employer. Particularly in the consultancy sector, just as small firms might combine with others with complementary skills and/or resources, so experienced individual professionals could combine with other independent practitioners to compete for work and then form part of the multi-disciplinary team appointed to undertake the project. …. Being formed of a group of independent ‘e-lances’ or ‘tech-nomads’, the operational overheads of such a multi-disciplinary consortium are also likely to be lower, making their services more cost-effective – an advantage likely to be underlined if the team also uses low-cost collaboration technology to manage and share its data."
  • You are the weakest link, goodbye - Joan has a list of funny/tragic redundancy stories.
  • cityofsound: Work and The City, Frank Duffy (2008) - Good review of Duffy's book: "In particular, Work and the City convincingly details how this has led to a grossly inefficient under-utilisation of resources with damaging effects on individuals, corporations, and almost all aspects of urban ecosystem."
  • Sustainability Consulting: What is it, and am I qualified? Part I « Bright Green Talent Musings (www.brightgreentalent.com) - And I count myself amongst those who say sustainability is NOT a discipline: "As individuals from all kinds of backgrounds and industries push into the field of sustainability consulting, it can become murky as to what that work even entails. This is especially true when considering the different perspectives and methodologies that are employed and adding even more complexity is the variability among clients and their needs. Thus, this quote sums up for me what sustainability consultants are trying to do - they help businesses address and redress the way in which they operate so that they will be better positioned for the market of the future a la decreasing their negative impact on the natural environment. Some argue that like the trends of international business and e-commerce, sustainability will at some point cease to be its own discipline and assume its rightful place within all of business practices."
  • » Perpetual beta SuDoBE — Sustainable Design of the Built Environment - Chris makes a great point: "What would happen if we treated buildings as being in perpetual beta state? How would this change things in the construction industry? Perhaps developers and the design team would make a long term commitment to upgrading the building in line with occupants’ (and others’) experiences after the building’s initial release.
    Of course buildings, like most artefacts are in perpetual beta. There are always ‘bugs’ to iron out and features that don’t work. Many of our new low and zero carbon buildings will fail either from the outset or a few months or years down the line. It would be a real step forward if we could admit that now and put in place the mechanisms that will allow us to decide whether they are working as intended, to fix them when they aren’t and to pass on what we have learned to Carbon 2.0. Would the industry allow us to do that? Do we need to ask?"
  • Robinson Low Francis to slash staff pay 12.5% - Building - I'm sure this is just the same as cutting salaries by 20-40% - surely they'll just end up doing a similar amount of work, in fewer (probably longer) days (was my experience of working part-time, anyway): "At engineer Scott Wilson, some senior staff have agreed to work three- or four-day weeks, according to Jerome Monro-Lafon, its UK managing director."
  • Survey confirms building control officers enforce regs - Building - "The LABC’s survey looked at 2000 projects to see how many potential contraventions would have occurred if a building control officer hadn’t stepped in and enforced the regulations. It found Part A attracted the most enforcement action with building control officers asking for remedial action in 18% of projects followed by Part L at just over 16% and Part B at just under 16%. Part G which deals with hygiene attracted enforcement action in just 1.5% of the surveyed projects."
  • Natural lighting and sustainability | Sustainable Building Blog - Building Sustainable Design - "The tightening regulatory allowances placed on artificial lighting are already beginning to push the limits of what lighting technology can deliver. Our regulatory framework must not become unworkable or breed dull, unhealthy and uninteresting visual environments. The lighting community must steer regulation through better government lobbying, but we should not forget the place natural light has in avoiding the need for regulation in the first place."
  • Pursuing the Elusive Goal Of a Carbon-Neutral Building by Richard Conniff: Yale Environment 360 - "But Kroon is also a reminder of what even some of the best hearts and minds in the sustainable design movement cannot yet achieve. For a “green premium” unofficially estimated at about 5.7 percent of construction cost, the Kroon design team managed to reduce projected energy use and emissions by 61 percent below the levels for a comparable building of conventional design. The biggest savings came not from sexy new technologies but from figuring out how to make the design function like an old-fashioned cathedral, with a slender profile for maximum daylighting, an east-west orientation for greater solar gain on the long southern exposure, careful use of shading, and plenty of stone and concrete to store thermal energy. A solar photovoltaic array and geothermal wells will supply much of the remaining energy load. “We got damned close to carbon neutral,” boasted a construction manager…"
  • Sustainable Cities - The most useful output I've seen from CABE - sustainable cities website. A feast of information and examples: "This website gives expert advice on planning, designing and managing a sustainable place. It cuts through the complexity with clear priorities for action. And it shows which places are getting it right."
  • Constructing Excellence in the Built Environment » Blog Archive » Reverting to type (by Don Ward) - Don Ward has a great post: "The industry loves lowest price tendering - it invented it, and back in 1963 codified it in the NJCC’s code of practice for single stage tendering. Large parts of the industry have since conspired with clients over the years to continue with lowest price tendering – it is easy, and it means you don’t have to work too hard to deliver on value. But let’s face it, it usually knowingly sets the project up to fail. It’s a bizarre process - as a questioner said at a conference the other day put on by the Universities of Reading, Loughbrough and Salford, construction must be the only industry that competes to deliver the same thing for the client rather than something different? And is it the only industry that thinks it’s clever to make its money by screwing the client and/or the supply chain?"

admin News , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

My del.icio.us bookmarks for June 1st through June 2nd

June 2nd, 2008

These are my links for June 1st through June 2nd:

mel starrs News , , , , , , , ,