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  • Rebuilding After Chinese Earthquake: Beautiful Bamboo Homes

    Rebuilding After Chinese Earthquake: Beautiful Bamboo Homes

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    It has been a year since the May 12, 2008 Sichuan earthquake in China that killed more than 70,000 people.

    China’s strongest earthquake for more than half a century, with a magnitude of 8.0 (en.wikipedia.org), it devastated large parts of the province of Sichuan. More than 10 million people were made homeless, most of them poor and elderly villagers (cities were not badly damaged).

    Getting Sichuan back to normal is critical for not only the province’s people, but for all of China. Sichuan is China’s rice bowl, growing more food than any other province. But despite the abundance of food, Sichuan remains poor and has seen its working age population move away for work. If it is to have a viable future then its communities need to get back to normal as fast as possible – and its farming economy back to full production.

    The unprecedented media coverage of the disaster meant people across China saw the scenes of devastation and have since contributed large donations to help with the reconstruction. The Chinese government has pledged to spend US $151 billion on reconstruction projects.

    Finding ways to re-house people after large disasters has become an urgent issue over the last five years. From the Asian tsunami to Hurricane Katrina in the United States and multiple hurricane disasters in the Caribbean, restoring communities is critical for the health of the people and the economies they rely on. Experience has shown that temporary shelters have many drawbacks, being usually of poor quality for long-term habitation and a source of health problems.

    The temporary shelters erected for the Sichuan homeless are unsuitable for long-term housing: the 12 square metre grey boxes – two sheets of aluminium sandwiching a polystyrene core for insulation – have no heating. The occupants roast inside in the summer and freeze in the winter. They are also located away from the main source of income: the farms.

    The dilemma is how to build new, long-term houses that will not cost too much. Inflation has increased the costs of conventional building materials: bricks, cement and steel.

    But the use of traditional building materials and home designs offers an alternative. By drawing on the abundant bamboo and wood in Sichuan and by building to traditional designs, cheaper but sturdy and beautiful homes can be built.

    An average home now costs around 80,000 yuan (US $11,688). The Chinese government estimates the price is now 820 yuan per square meter for a new home: bamboo homes cost between 300 and 400 yuan per square meter. Government compensation is between 16,000 yuan (US $2,337) and 23,000 yuan (US $3,360) per family. The bamboo houses range in size from 75 to 200 square metres, and in cost from 22,500 yuan to 80,000 yuan for a very large home.

    In Daping village, Pengzhou Town, original homes destroyed by the earthquake sit at the edge of a forested hill. Their frames are more or less intact, but the walls and roofs have collapsed. The new houses replacing them are large, two stories high and have solid grey clay tile roofs. The beauty of the designs stands out and sits in stark contrast to the temporary shelters and concrete buildings.

    “There are 43 houses and two public buildings being rebuilt in this project,” says team member Hu Rong Rong of the Green Building Research Centre of Xi’an University of Architecture and Technology. “The design and the main building material are based on the ecological and sustainable habitat idea. The place (Sichuan) is rich in bamboo and wood. These natural materials are cheap and friendly to the environment. In some buildings we use light steel which can be also recycled.”

    The new homes are built to earthquake resistance standards. Led by Professor LiuJiaping, a team of 15 people from the research centre and two from a design institute developed the home designs and supervised the training of local people. They were joined by 10 people from an NGO called Global Village of Beijing, who managed the project to completion.

    “All the designs were discussed with the local people,” continues Hu. “We trained a local construction team, which means the local people would build their own houses by themselves. Both our research center and the local people were involved in developing the home design.

    “To get the trust from the local people is a challenge in the project. We resolved it by showing our respect to the local people. Before we started our design we discussed with the local people many times to know what kind of house they like. We built the first house to make them believe us.”

    Hu believes it is possible to replicate the homes across Sichuan.

    “The design is suitable for other villages in Sichuan which have a similar climate and culture with this village. To rebuild sustainable houses after a disaster we should know well about the local life, environment and culture – try to find the useful technique which was used in their traditional houses and upgrade the traditional house to meet the need of their modern life.”

    Others have not been as lucky as these villagers. In the village of Yuan Bao, Chen Jingzhong, 66, has had to build a makeshift shack: “They wanted to get us to build our own houses but they didn’t give us enough money,” Chen told the Telegraph Magazine. “All we could afford was this shack, which we built ourselves, with our own hands and without any help from anyone.”

    Published: May 2009

    Resources

    Architecture for Humanity: By tapping a network of more than 40,000 professionals willing to lend time and expertise to help those who would not otherwise be able to afford their services, they bring design, construction and development services where they are most critically needed. Website: www.architectureforhumanity.org

    Chinese Red Cross: The Red Cross Society of China is accepting donations for disaster reconstruction and is coordinating rebuilding efforts in Sichuan Website: http://www.redcross.org.cn/ywzd/

    Gerd Niemoeller has developed flat pack, cardboard homes that can be deployed quickly after a disaster and can become permanent homes.Website: http://tinyurl.com/6t6jtf and the company
    Website: http://www.wall.de/en/home

    Global Greenhouse Warming is a website that tracks extreme weather events around the world: drought, flooding, severe storms, severe winter, tropical cyclone, wildfires, and extreme heat waves.Website: www.global-greenhouse-warming.com

    The Building and Social Housing Foundation: An independent research organization promoting sustainable development and innovation in housing through collaborative research and knowledge transfer. Website: www.bshf.org

    https://davidsouthconsulting.org/2021/09/01/disaster-recovery-ten-years-after-the-gujarat-india-experience/

    https://davidsouthconsulting.org/2021/11/12/energy-efficient-wooden-houses-are-also-earthquake-safe/

    https://davidsouthconsulting.org/2021/09/01/haiti-earthquake-prompts-tech-aid/

    https://davidsouthconsulting.org/2021/02/12/rammed-earth-houses-china-shows-how-to-improve-and-respect-traditional-homes/

    https://davidsouthconsulting.org/2022/09/26/3d-home-printing-landmark-10-houses-in-a-day/

    Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP’s South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South’s innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.

    https://davidsouthconsulting.org/2021/03/05/southern-innovator-issue-4/

    Creative Commons License

    This work is licensed under a
    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

    ORCID iD: https://orcid.org/0000-0001-5311-1052.

    © David South Consulting 2023

  • All-in-One Solar Kiosk Business Solution for Africa

    All-in-One Solar Kiosk Business Solution for Africa

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    Kiosks are ubiquitous throughout commercial areas in the global South. These highly efficient little business outlets enable small-scale entrepreneurs to sell necessary products without the expense of renting and running a shop.

    While they are a great solution for entrepreneurs and customers alike, they often lack connection to municipal services such as electricity and water. That means kiosk owners need to use batteries or a generator if they need a refrigerator to cool food and drink – an expensive proposition.

    A new product launched this year in Addis Ababa, Ethiopia offers a solution.

    Created by a team of German architects, the Solarkiosk (solarkiosk.eu) is an autonomous business unit designed for remote, off-grid areas. With solar panels across the top of the kiosk, it generates its own electricity and is basically a mini solar power plant. Inside, it is just like a conventional kiosk, with display shelves for products and a counter in the front with a flap – which can feature advertising and messages – that can be opened up for business and locked shut when the kiosk is closed.

    The kiosk captures solar energy and the electricity generated can be used to run a computer, lights or a refrigerator. That makes the Solarkiosk capable of offering a wide range of services needing electricity, from Internet access to car-battery charging and mobile phone recharging – a now essential service as mobile phone use explodes across Africa.

    The first kiosk was prototyped in November 2011 and the makers incorporated their first subsidiary, Solarkiosk Solutions PLC, in Addis Ababa, Ethiopia in March 2012.

    According to Solarkiosk 1.5 billion people worldwide have no regular supply of electricity – 800 million of them in Africa. The makers of Solarkiosk consider this a huge market and hope to make the most of it.

    The kiosk comes in a kit form ready for assembly. The kit is designed to be easy to transport and is light enough and compact enough to be transported on the back of a donkey, its makers claim.

    Solarkiosk operators receive training in running and managing a kiosk. They learn about solar technology and how to maintain the kiosks and run a sustainable business. Once the operators are trained and up and running, they typically hire others to help with running the kiosk and offer the services at convenient times for the customers. The Solarkiosk then, potentially, becomes an income and employment generator for the local community.

    The kiosk is designed to be durable, secure and difficult to tamper with from the outside. The kiosks have been designed to suit many environments and requirements. There is a basic platform that can be added to or expanded depending on local needs and a series of models depending on the customer’s needs. Cleverly, the largest kiosk model is powerful enough to provide electricity to telecom towers. This has proven attractive to mobile telephone companies who can power a telecom tower and make money from running the kiosk as well.

    The Solarkiosk is especially useful for countries near the equator where nights are long (12 hours) and the kiosk can help people get light to read, study and work.

    Solarkiosk is targeting off-grid customers who are using up to 40 per cent of their household income on electricity substitutes. According to Solarkiosk, people in off-grid households collectively spend more every year (US $30 billion) lighting their homes – using candles for example – than do all the people living in electricity grid connected countries (US $20 billion).

    Solar technology is becoming more affordable at the same time as demand in developing countries for electricity and the products powered by electricity is on the rise. Mobile phones are now essential tools for doing business and staying connected – and all of them need to be kept charged up.

    Solarkiosk believes it can save the average off-grid household US $10 per month, while each kiosk could supply solar electricity services to between 200 and 5,000 households.

    For now, Solarkiosk is available in Ethiopia. It is based in Berlin, Germany and receives money from the German government. The kiosks themselves were designed and built by Graft Architects (http://www.graftlab.com).

    Published: November 2012

    Resources

    1) How to maintain a solar panel. Website: http://www.ehow.com/how_2005490_maintain-solar-panel.html

    2) How to start a kiosk business. Website: http://www.entrepreneur.com/article/63012

    3) Kiosk Innova: A Turkish pioneer of hi-tech kiosks for retail services. Website: http://www.kioskinnova.com/english

    Southern Innovator was designed and laid out in Iceland using 100% renewable energy, much of which is from geothermal sources. 
    Creative Commons License

    This work is licensed under a
    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

    ORCID iD: https://orcid.org/0000-0001-5311-1052.

    © David South Consulting 2023

  • US $450 Million Pledged for Green Economy Investments at Kenyan GSSD Expo

    US $450 Million Pledged for Green Economy Investments at Kenyan GSSD Expo

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    Innovators working in the global green economy could benefit from over US $450 million in investment recently pledged at the UN’s Global South-South Development Expo (GSSD Expo) held in Nairobi, Kenya.

    A combination of green investors, businesses, governments and others came together at the UN Environment Programme’s (UNEP) headquarters in the Kenyan capital from 28 October to 1 November 2013 to share solutions and strike deals and partnerships.

    The event represented a significant turning point in awareness of the role played by the global South’s innovators in global development and growing economies. The quantity of pledges and investment deals struck at the Expo bodes well for the future of south-south solution sharing.

    Organized by the UN’s Office for South-South Cooperation in UNDP (UNOSSC) (southsouthexpo.org) and hosted by UNEP (unep.org) under the theme “Building inclusive green economies”, the Global South-South Development Expo (GSSD Expo) is the world’s biggest event for development solutions created in the South for the South.

    “The theme of this year’s Expo is fitting in that Southern countries have both the opportunity and the obligation to pursue a ‘smarter’ development course than their predecessors,” said General Assembly President John Ashe.

    Examples of the investment deals struck include helping to build organic fertilizer factories and constructing solar power plants in Kenya, and growing green business ventures for women in Egypt.

    South-South cooperation is the exchange of resources, technology and knowledge between developing countries. Today, over US $5 trillion in currency reserves are held by countries of the global South. They also make up 47 per cent of global trade.

    Tapping this rich resource is an unparalleled economic development opportunity and could be one of the main engines of growth in the years ahead, the Expo organizers believe.

    “As so many stories that we have heard this week demonstrate, South-South Cooperation is playing a vital role in facilitating this global transition,” said UN Under-Secretary-General and UNEP Executive Director Achim Steiner.

    “Not only are these local, national and regional efforts producing positive results, but they are overcoming barriers, building new partnerships, creating new finance mechanisms, generating knowledge, sharing information, providing training and capacity building in areas and sectors that are critical for a global transition to a low carbon, resource efficient and inclusive economy,” he added.

    As an example of how solutions are shared and deals are struck, more than 40 companies were successfully matched and held business negotiations using the Expo’s South-South Global Assets and Technology Exchange (SS-GATE). An online match-making service bringing together innovative companies with the knowledge and funding they need to grow, the SS-GATE was able to get 148 companies to list their projects on the SS-GATE web-platform during an Expo event.

    For the first time in its history, the Expo garnered a strong online presence with the help of volunteers who collaborated remotely around the world on social media. The event was so popular that it trended on Twitter in Kenya, meaning that the message of the value and growing scope of South-South cooperation reached the next generation of development practitioners, entrepreneurs, environmentalists, thinkers and leaders.

    Also at the Expo, the fourth issue of Southern Innovator magazine (southerninnovator.org) had its official launch. Southern Innovator Issue 4 visits the new cities being built to tackle the challenges of a rapidly urbanizing 21st-century world. The magazine also highlights some of the solutions being devised to the challenges people face as the world becomes a majority urban place.

    Some innovators are building new cities from scratch, applying the latest thinking and hard-wiring in cutting-edge information technologies and innovative environmental measures to create “smart” cities and eco-cities. Architects are designing and refining homes that are beautiful and functional, easy to build, affordable and conserve energy. Social entrepreneurs are innovating ways to create liveable and socially inclusive urban areas, often in places where planning has been scant and where incomes are very low. All the stories featured in the magazine were chosen for their focus on improving human development and for their ingenuity and fresh thinking.

    Southern Innovator champions a 21st-century global innovator culture. It is being distributed through the United Nations’ network and partners and reaches some of the world’s poorest and remotest places, as well as the vibrant but stressed growing global megacities. It is hoped the magazine will inspire budding innovators with its mix of stories, essential information, facts and figures, images and graphics.

    Published: November 2013

    Resources

    1) Global South-South Development Expo: The Global South-South Development Expo (GSSD Expo) is the FIRST EVER Expo solely from the South and for the South. It showcases successful Southern-grown development solutions (SDSs) to address the need to meet the Millennium Development Goals (MDGs). Website: http://www.southsouthexpo.org/

    2) Southern Innovator online story archive: Organized by theme, the story archive is a treasure trove of innovation stories and resources from the global South stretching back to 2006. Website: southerninnovator.org

    3) Southern Innovator on Scribd: Archived copies of the full-color, 60-page magazine can be downloaded here. Website: http://www.scribd.com/SouthernInnovator.

    4) Southern Innovator on Twitter: Catch Southern Innovator’s Tweets and keep on top of a growing global network of innovators. Follow @SouthSouth1

    Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP’s South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South’s innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.

    Creative Commons License

    This work is licensed under a
    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

    ORCID iD: https://orcid.org/0000-0001-5311-1052.

    © David South Consulting 2021

  • Ethiopia and Djibouti Join Push to Tap Geothermal Sources for Green Energy

    Ethiopia and Djibouti Join Push to Tap Geothermal Sources for Green Energy

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    Ethiopia and Djibouti are the latest global South countries to make a significant commitment to developing geothermal energy – a green energy source that draws on the heat below the earth’s surface (http://en.wikipedia.org/wiki/Geothermal_energy) – to meet future development goals.

    Ambitiously, Ethiopia also hopes to build Africa’s largest geothermal power plant.

    It joins Kenya, which in 2012, announced projects to expand its geothermal capacity further. Currently, Kenya is Africa’s largest geothermal producer and has geothermal resources concentrated near a giant volcanic crater in the Great Rift Valley with 14 fields reaching from Lake Magadi to Lake Turkana. There are also low temperature fields in Homa Hills and Massa Mukwe (http://www.gdc.co.ke/index.php?option=com_content&view=article&id=191&Itemid=163). Around 1,400 steam holes are being drilled.

    Cooperating with Reykjavik Geothermal (rg.is), a US-Icelandic private developer, Ethiopia will spend US $4 billion to build a 1,000 megawatt geothermal plant at Corbetti (http://www.volcano.si.edu/volcano.cfm?vn=221290). It is expected to be ready in eight to 10 years. The country wants to be carbon neutral by 2025.

    Drilling will need to go down as deep as 3 kilometers to tap the source. This is expensive and a technological challenge, thus the need for international expertise. The country hopes to develop this source of energy and then export electricity to neighboring African countries.

    Another plant, Aluto Langano 7, is being built 201 kilometers south of Addis Ababa, the capital, by a partnership between the Japanese government, Ethiopia and the World Bank.

    Ethiopia has enormous potential for geothermal energy, according to a paper in the journal Geothermics: “Ethiopia holds an enormous capacity to generate geothermal energy in the volcano-tectonically active zones of the East African Rift System (http://www.sciencedirect.com/science/article/pii/S0375650513000023).”

    At present, 70 per cent of people in sub-Saharan Africa, some 600 million, are without a domestic electricity supply (USAID). Electricity and other sources of energy are required if living standards are to be raised for millions of the world’s poor. The danger of this, however, is to the planet if the energy comes from polluting sources.

    In March 2013 the World Bank announced a significant push to increase development of geothermal resources around the world, and in particular in energy-hungry, fast-developing countries.

    “Geothermal energy could be a triple win for developing countries: clean, reliable, locally produced power,” the bank says. “And once it is up and running, it is cheap and virtually endless.”

    The bank joined forces with Iceland to make a pledge to secure US $500 million in financing to get geothermal projects up and running. The announcement was made at the Iceland Geothermal Conference (http://geothermalconference.is/) in Reykjavík, the Icelandic capital.

    Few countries have such easy access to geothermal energy as Iceland, with its plentiful volcanoes, geysers and hot springs bursting through the surface. But it is there, under the ground, and through the Global Geothermal Development Plan (GGDP), it is hoped this plentiful energy source will become the norm for countries around the world.

    The World Bank believes at least 40 countries can get into geothermal on a significant scale with the correct investment. Many developing world regions are rich in geothermal resources, including East Africa, Southeast Asia, Central America, and the Andean region.

    Just 11 gigawatts of geothermal capacity is currently being tapped in the world. Nuclear power, for example, generates 370 gigawatts a year (2012) (EIA). What has held back many countries has been the high upfront costs involved in getting projects going. A site must be found, drilled and tested to see if it is viable.

    The GGDP plan is to raise US $500 million from donors and others to fund geothermal exploration and development. The GGDP will identify promising sites and then acquire funding to pay for drilling to identify commercially viable projects.

    The World Bank has increased financing for geothermal development from US $73 million in 2007 to US $336 million in 2012. It comprises 10 per cent of the Bank’s renewable energy lending.

    The Icelandic International Development Agency (iceida.is) signed a partnership in September 2013 with the government of Ethiopia to undergo geothermal surface exploration and to build Ethiopia’s capacity to develop this energy source. The World Bank estimates that Ethiopia has the potential to generate 5,000 megawatts (MW) of energy from geothermal sources.

    The Geological Survey of Ethiopia (GSE) and the Ethiopian Electric Power Corporation (EEPCO) will undertake exploration at sites in Tendaho Alalobeda and Aluto Langano.

    It fits in with a wider push by Ethiopia to develop its renewable energy resources. The country is also increasing investment in hydro-electric power.

    The Ethiopia project is part of the wider World Bank-Iceland compact to develop global geothermal energy capacity. It is the second such arrangement, with the first already underway in Rwanda.

    Djibouti is also moving into geothermal, with a new agreement with the World Bank to develop a site at Lake Assal. The World Bank will provide US $6 million to evaluate its commercial potential. Djibouti tried to develop its geothermal resources privately but was not successful.

    Overall, geothermal power has the potential to help reduce Djibouti’s electricity production costs by 70 per cent, boost access to electricity for the population and alleviate the country’s energy dependency. The country hopes to have 100 per cent green energy by 2020.

    Joining forces on helping boost geothermal in Africa is USAID’s Power Africa fund, which is providing US $7 billion in financial support and loan guarantees for energy projects.

    Apart from generating electricity, what else can this powerful resource do? Countries such as Iceland now use hot geothermal water to heat homes and provide domestic hot water. Iceland also has an extensive network of swimming pools and spas in each town. The Blue Lagoon (bluelagoon.com) is a good example of how geothermal power generation can have lots of side benefits. The giant, steamy blue-colored lagoon is the consequence of an accident in 1976 at the nearby geothermal power plant; it’s now a spa and one of the country’s main tourist attractions.

    The geothermal-heated pools and spas play a key role in keeping the cold north Atlantic country healthy – Iceland ranked number one on the UNDP human development index in 2007 – and provide a recreational source even in the depths of winter.

    Published: December 2013

    Resources

    1) Iceland Review: A great way to learn about life on an island powered by geothermal energy. Website: icelandreview.com

    2) Nordic Development Fund: The Nordic Development Fund (NDF) is the joint development finance institution of the five Nordic countries. The objective of NDF’s operations is to facilitate climate change investments in low-income countries. Website: ndf.fi

    3) Icelandic International Development Agency (ICEIDA): The Icelandic International Development Agency (ICEIDA) is an autonomous agency under the Ministry of Foreign Affairs and is responsible for the implementation of official Icelandic bilateral development cooperation.  It follows the Icelandic government’s Act on Development Cooperation No 121/2008, which is in keeping with the UN Millennium Development Goals and other international commitments, such as the Monterrey Consensus on Financing for Development and the Paris Declaration on Aid Effectiveness. Website: iceida.is

    4) Geothermal Exploration Project, NDF: The main objective of the Geothermal Exploration Project is to assist countries in East Africa to enhance geothermal knowledge and capacity in order to enable further actions on geothermal energy development in the respective countries. The project could extend to 13 countries in the East Africa Rift Valley: Burundi, Comoros, Djibouti, DR Congo, Eritrea, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Tanzania, Uganda and Zambia. Website: http://www.iceida.is/iceida-projects/nr/1488

    5) Power Africa: Power Africa – an initiative to double the number of people with access to power in sub-Saharan Africa. Power Africa will achieve this goal by unlocking the substantial wind, solar, hydropower, natural gas, and geothermal resources in the region to enhance energy security, decrease poverty, and advance economic growth. Website: http://www.usaid.gov/powerafrica

    6) Geological Survey of Ethiopia: The GSE has been generating , collecting  and managing geoinformation of the country for the last 4 decades. Website: http://www.gse.gov.et/index.php

    7) Home geothermal: A feature from Popular Mechanics on how geothermal can work in the home. Website: http://www.popularmechanics.com/science/energy/hydropowergeothermal/4331401

    Like geothermal energy? Then we think you will like our Southern Innovator Magazine. Designed and laid out in Iceland using 100% renewable energy (much of which is geothermal). 


    This work is licensed under a Creative Commons Attribution 4.0 International License.

    ORCID iD: https://orcid.org/0000-0001-5311-1052.

    © David South Consulting 2023