David South Consulting

Category: Southern Innovator magazine

  • Making Bamboo Houses Easier to Build

    Making Bamboo Houses Easier to Build

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    More than 1 billion people around the world lack decent shelter. Of these, the majority live in urban areas, usually in slums and informal settlements (UN-HABITAT). Latin America has a serious shortage of adequate housing: in Colombia, 43 percent of the population needs decent housing; in Brazil, 45 percent; Peru, 53 percent.

    The challenge is to provide good quality homes without significantly harming the environment – and with constrained budgets. Bamboo – cheap, strong, quickly renewable and beautiful to look at (http://en.wikipedia.org/wiki/Bamboo) – is an ideal solution to replace traditional wood lumber. In Bolivia, pioneering work is underway to improve the quality of homes and buildings made with bamboo.

    Bamboo is the fastest growing woody plant in the world, sometimes growing over 1 metre a day. Bolivia (http://en.wikipedia.org/wiki/Bolivia) has about 17 identified bamboo species, of which five have a significant economic value. Around the world, there are 1,000 species of bamboo. They grow in a wide variety of climates, from cold mountains to hot tropical regions.

    Once called the “poor man’s timber” – a temporary building material to replace once there is more money – bamboo is now getting the respect it deserves. Bamboo for housing has a long history in Latin America, stretching back 4,500 years to ancient civilizations. In Asia, it has long been a traditional construction material. But most of the existing bamboo dwellings in Latin America are 50 to 100 years old.

    The most popular species of bamboo used in South America is Guadua, which is known for being large, straight and attractive.

    “In Bolivia, there is no other building material more competitive in costs,” said Jose Luis Reque Campero, coordinator of the Bolbambu Programme of the Architectural Research Institute, Universidad Mayor de San Simon, Bolivia (http://www.umss.edu.bo/).

    “Bamboo is the material that requires less energy, followed by wood and concrete, with steel in last place, needing energy necessary for its production 50 times greater than that required by bamboo.”

    Campero also says bamboo is much less expensive than traditional building materials.

    “But the biggest advantage is certainly the possibility of planting bamboo, and then reaping houses,” he said.

    Campero has focused his efforts on a key component of bamboo housing: the joints that bind the bamboo poles together. Driven by the desire to find ways to improve the ease of building bamboo homes and their strength, Campero came up with the Bamboo Bolivia Space Structures, Structural System: EVO (BBSS-EVO) (named after Bolivia’s president, Evo Morales – http://en.wikipedia.org/wiki/Evo_Morales).

    Traditional joints took a long time to make and required power tools and complex instruction manuals. Simplifying the building techniques necessary for bamboo construction was important because, while bamboo was cheap, the labour costs were high.

    The joint looks like a giant two-headed Q-Tip. Each end is made of four pieces of bamboo, connected by a long screw with bolts on each end taken from old cars. The joint is inserted inside the bamboo poles and snaps shut, joining poles tightly together and, as each piece is assembled, looking like a child’s building toy as the structure of the bamboo home takes shape.

    The new joint was easier to assemble and was quickly adopted by local builders. It also allows for a vast range of structures and shapes to be built, limited only by imagination and physics.

    Devising joints made from bamboo has the advantage of avoiding the weight and cost of bringing in concrete, especially to remote areas.

    “The manufacturing process is fully in the workshop and indoors,” said Campero, “which in addition to allowing a degree of quality control in production, improves working conditions for staff and protects the material.”

    The whole building process adheres to “the principles of the famous phrase: ‘do-it-yourself’.”

    The Evo joint allows for flexibility and easy assembly and disassembly, enabling the builder to move around parts of the structure and not be wedded to the original structural plan. This has the advantage of customizing the building to its physical location.

    Working in the tropical forests of Cochabamba (http://en.wikipedia.org/wiki/Cochabamba), Campero has been testing his designs with the local people, who were looking to improve the tourist infrastructure in the resort town of Cristal Mayu.

    Costa Rica in Central America – ironically a country without indigenous bamboo plants – has used its National Bamboo Project of Costa Rica (http://www.unesco.org/most/centram1.htm) to prove it is possible to both cultivate bamboo and use it to provide housing for the poor, confirming the wisdom of millions of people: bamboo is economical, convenient, safe and looks great.

    Campero has received a great deal of interest in his innovations and is looking for funding partners in 2009 to take his work further.

    He has this advice for other builders and designers: “Stick to developing local technologies, use what you have and innovate, use native materials and the local environment for the development of elements, components and construction systems. Don’t rely on advanced technology tools for manufacture, and stay in harmony with the human need for creativity.”

    Published: December 2008

    Resources

    • UNEP, the UN’s Environment Programme, has produced a report on bamboo biodiversity and how it can be preserved. Website: http://www.unep-wcmc.org
    • The Asian Development Bank is using its Markets for Poor programme to link bamboo products to marketplaces, helping poor communities. Website:http://www.markets4poor.org/
    • The United Nations Human Settlements Programme, UN-HABITAT, is the United Nations agency for human settlements. It is mandated by the UN General Assembly to promote socially and environmentally sustainable towns and cities with the goal of providing adequate shelter for all. Website: www.unhabitat.org

    https://davidsouthconsulting.org/2022/10/26/bamboo-becomes-transport-option-for-the-south/

    https://davidsouthconsulting.org/2022/10/26/colombian-architect-proving-strength-and-beauty-of-bamboo/

    https://davidsouthconsulting.org/2021/11/11/decent-and-affordable-housing-for-the-poor/

    https://davidsouthconsulting.org/housing/

    https://davidsouthconsulting.org/2022/11/16/housing-innovation-in-souths-urban-areas/

    https://davidsouthconsulting.org/2021/11/11/housing-solution-for-worlds-growing-urban-population/

    https://davidsouthconsulting.org/2021/02/12/rebuilding-after-chinese-earthquake-beautiful-bamboo-homes/

    https://davidsouthconsulting.org/2022/11/17/tiny-homes-to-meet-global-housing-crisis/

    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 2023

  • Bamboo Becomes Transport Option for the South

    Bamboo Becomes Transport Option for the South

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    The sturdy bamboo plant (http://en.wikipedia.org/wiki/Bamboo) is enjoying a revival around the world as a building material. A strong, fast-growing and highly renewable woody plant, it is becoming increasingly popular as people seek out less environmentally wasteful alternatives to steel and other materials.

    But who would have thought bamboo taxis would turn up on the scene?

    A fleet of bamboo taxis is now plying the streets in Tabontabon, a municipality in The Philippines that is home to 10,000 people, most of them rice farmers.

    Bamboo can sometimes grow more than 1 metre a day. While in Asia, it has long been a traditional construction material, people are now turning to it to make transportation vehicles. In The Philippines, there are 62 species of bamboo, up to 15 of which are suitable for industrial applications.

    So-called habal-habal motorcycles, the most popular form of transportation in the town, are also the source of many accidents and are uncomfortable on sunny days or when it rains. A covered taxi service is both a safer and a more comfortable alternative.

    The town’s mayor, Rustico Balderian, took the initiative to build a fleet of bamboo taxis. He set four criteria the new taxis had to meet: they should be low-cost, fuel efficient, safe and environmentally friendly. The bamboo has a higher tensile strength (http://en.wikipedia.org/wiki/Tensile_strength) than steel, which also requires vast quantities of energy to produce.

    The taxis are 90 percent made of bamboo and are built by unemployed youth. They are divided into Eco 1 (a model that seats 20 people and runs for eight hours on one gallon of coco-biodiesel from coconuts) (http://cocobiodiesel.blogspot.com/), and Eco 2, which seats eight people, has a stereo and sound system, and also runs for eight hours on a gallon of coco-biodiesel.

    Both are made by the Tabontabon Organic Transport Industry [TOTI] (http://totieco.multiply.com/).

    Making vehicles out of bamboo is a serious endeavour that also has been under development in Japan. In 2008, Kyoto University’s Venture Business Laboratory (VBL) unveiled a unique single-seat electric vehicle equipped with a body made from bamboo. The vehicle was developed under the Kyoto Electric Car Development Project, which is one of the laboratory’s major initiatives. Nicknamed Bamgoo, this eco-car’s body is made of braided rods of bamboo, one of the local specialty products of the area.

    Other bamboo modes of transport in the South include bamboo bicycles in Ghana. A partnership between an American bike designer and a Ghanaian government initiative is taking advantage of this local resource to manufacture bicycles for the local market – and as a source of export income.

    Not only are the Ghanaian builders harvesting bamboo to make bikes for the domestic market, they are also offering a sophisticated online shopping service for the overseas market. People from around the world can now buy Ghanaian bikes using a website (http://www.bamboosero.com). Customers can choose frame builders by their specialty – cargo bike, mountain bike or road bike – and then order it online. The completed bikes are quality checked and then distributed by Calfee Design in California, USA. This approach keeps the middlemen out of the transaction, and means more money gets back to the bike builder.

    Meanwhile in Cambodia, the legendary bamboo railway is a people’s solution to the poor service offered by the established railway system. In the northwest of the country near the second city of Battambang, an entire railway system has been built using bamboo.

    The bamboo trains, called ‘noris’ or ‘lorries’ by the locals, are driven by a electric generator engine. Passengers sit on a bamboo platform placed on two sets of wheels. The bamboo train reaches speeds of over 40 km/h.

    “We’re very careful,” 18-year-old Sok Kimhor, a 10-year veteran of the bamboo trains, told the BBC. “We look out for children and animals running across the lines, and we have to slow down when other trains come along.”

    There is just one track, so when two trains meet, one has to be taken off the track to pass.

    The regular rail service runs only once a week to the capital, Phnom Penh. This makes the bamboo train the only alternative for many people to get around. While the main railway station is deserted, the bamboo service is a hive of activity.

    “They’re very safe – a motorbike taxi is too fast, and if I use one of those I sometimes get dizzy and fall off,” said Sao Nao as she sat on the rails with a small group of people. “On a bamboo train I can sit down and go to sleep. You can’t do that on a motorbike.”

    Design for Development (http://designfordevelopment.org/) is also turning to bamboo for a transport solution. The Canadian NGO is working in Kenya on making five emergency medical transportation devices (EMTD), or ambulances, to move local people to health clinics or hospitals. Bamboo is locally available and they hope to set up a workshop and make the ambulances using local labour.

    Published: August 2009

    Resources

    1) A slideshow of the bamboo taxis. Website:http://totieco.multiply.com/photos/album/2/ECO2

    2) UNEP, the UN’s Environment Programme, has produced a report on bamboo biodiversity and how it can be preserved. Website: http://www.unep-wcmc.org

    3) The Asian Development Bank is using its Markets for Poor programme to link bamboo products to marketplaces, helping poor communities. Website:http://www.markets4poor.org/

    4) A blog describing the use of coco-biodiesel in the Philippines. Website: http://cocobiodiesel.blogspot.com/

    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 2023

  • Colombian Architect Proving Strength and Beauty of Bamboo

    Colombian Architect Proving Strength and Beauty of Bamboo

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    Fast-growing bamboo grass (http://en.wikipedia.org/wiki/Bamboo) has become a cause celebre amongst those looking for a sustainable and tough building material.

    In the last five years, more and more construction projects have turned to bamboo. It has many advantages: it grows quickly, is super-strong yet also supple enough to bend in a hurricane or earthquake and has a high tensile strength (http://en.wikipedia.org/wiki/Ultimate_tensile_strength) equivalent to steel. It is, of course, green since it is grown in forests, and is cheap and plentiful in many countries of the South, especially across Asia and Latin America.

    It is also aesthetically pleasing and makes beautiful structures with intricate patterns.

    But despite all these advantages, it has been a hard sales job to get people to choose bamboo as a building material rather than traditional woods, steel or concrete. Many people wrongly think green means not strong. But as many a construction worker knows in Asia, where scaffolding made from bamboo is commonplace, it is tough and stands on its own.

    Pioneers are working hard to prove bamboo deserves respect as a building material for a greener future.

    Award-winning Colombian architect Simón Vélez has designed more than 200 bamboo buildings in Germany, France, the United States, Brazil, Mexico, China, Jamaica, Colombia, Panama, Ecuador, and India.

    Vélez’s commissions are varied, and include a bridge for the Bob Marley Museum in Jamaica.

    One of his recent projects is the Zócalo Nomadic Museum (http://en.wikipedia.org/wiki/Nomadic_Museum) in Mexico City. Another is the Crosswaters Ecolodge (http://www.asla.org/2010awards/370.html), the first ecotourism destination in China in the forests of Nankun Shan Mountain Reserve, Guangdong Province. For the Expo Hanover 2000, he designed and constructed a 2000-square-meter bamboo pavilion for ZERI (Zero Emissions
    Research Initiative) (http://www.zeri.org/).

    Vélez has developed pioneering joinery systems to connect bamboo poles together. This is a critical focus of innovation if bamboo structures are going to win people’s trust.

    Based in Bogotá, Colombia, Vélez uses a well-trained crew to make his buildings and structures. This has the advantage of building expertise and a history of lessons learned from past successes and failures. That stability is a critical insight: many good ideas suffer from a lack of stability and longevity. He uses very simple, hand-drawn sketches on a single sheet of paper. He works with the peculiarities of the bamboo and does not treat it like wood: a common mistake.

    To tackle the woeful lack of decent housing for the poor, he has developed a low-cost house that can be built by home-owners. It is highly resistant to earthquakes and is 60 square metres divided on two floors. It costs
    around US $5,000 to make in Colombia.

    Winner of the Prince Claus Fund (http://www.princeclausfund.org/en/index.html), Vélez’s work promotes sustainable development, introducing new ideas on ecological issues and questions. The Fund calls him an architect “whose aesthetic and technical innovations have considerably expanded the possibilities of bamboo as a building material, providing a challenge to prevailing architectural trends.”

    With more than 1 billion people around the world lacking decent shelter, many see plentiful bamboo as a key part of the solution. Most people with poor quality housing live in urban areas, usually in slums and informal settlements (UN-HABITAT). Latin America has a serious shortage of adequate housing: in Colombia, 43 percent of the population needs decent housing; in Brazil, 45 percent; Peru, 53 percent.

    The challenge is to provide good quality homes without significantly harming the environment – and with constrained budgets. Bamboo – cheap, strong, quickly renewable and beautiful – is an ideal solution to replace traditional wood lumber.

    Bamboo is the fastest growing woody plant in the world, sometimes growing over 1 metre a day. Around the world, there are 1,000 species of bamboo. They grow in a wide variety of climates, from cold mountains to hot tropical regions.

    Once called the “poor man’s timber” – a temporary building material to replace once there is more money – bamboo is now getting the respect it deserves. Bamboo for housing has a long history in Latin America, stretching back 4,500 years to ancient civilizations. In Asia, it has long been a traditional construction material. But most of the existing bamboo dwellings in Latin America are 50 to 100 years old.

    The most popular species of bamboo used in South America is Guadua, which is known for being large, straight and attractive.

    Thoughtful and methodical pioneers like Vélez are proving bamboo has a viable future as a building material that will tackle the housing needs of the world’s poor and the fast-growing cities of the South.

    Published: December 2010

    Resources

    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 2023

  • Business as a Tool to Do Good

    Business as a Tool to Do Good

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    The United States’ fast-paced and highly inventive technology sector is re-shaping philanthropy and proving it is possible to do good and make money at the same time. The approach taken by these philanthropists is flavoured by their experiences in the cut-throat world of technology, where innovation is a necessity and where re-invention and risk are de rigeur. They share many of these qualities, counter intuitively, with millions of the world’s poor as they struggle day in and day out to survive and get ahead.

    Differing from the Fairtrade movement – whose origins are in NGOs seeking guaranteed fair price for goods – so-called ‘venture philanthropists’ and ‘social entrepreneurs’ focus more on profit and growth. They draw their inspiration from the online networks that have rocked the business world in the past few years, and look to apply a model of constant innovation.

    The past ten years have seen non-profits more and more adopt the language and methods of business. For ‘venture philanthropists’ and ‘social entrepreneurs’, business is the tool to do good. By breaking out of the narrow view of philanthropy as about giving away money, it becomes possible to see the connections between doing good and making good money, venture philanthropists argue. And as more people think this way, more tools are emerging to make it easier and easier to do.

    The highly successful online auction house Ebay’s founders Jeff Skoll and Pierre Omidyar are part of a wave of new thinking from California’s high-tech Silicon Valley that is shaping the way huge sums of private capital get invested in social change.

    ‘Venture philanthropists’ focus on a small portfolio of grantees that make the most of the investment. By giving them large, long commitments, including money for infrastructure such as staff and computers, they don’t spend all their time fundraising. And unlike traditional philanthropists, they get in their offices and work with them like partners instead of waiting for annual reports, and they hold the grantees to quantifiable goals.

    The success of Nobel Prize winner Mohammed Yunus and his microcredit bank, Grameen, has spawned an even more ambitious venture. The Omidyar Network – led by billionaire Omidyar – calculated it would take between US $50 and US $60 billion to provide micro-lending services to the entire world’s poor. The Network is currently putting together the financing to launch this new micro-lending facility across the world. According to Omidyar, private capital is functionally limitless. Look at it that way, he said recently to the Los Angeles Times, and “$60 billion is nothing.”

    Billing itself as a nonprofit venture capital firm, the Acumen Fund uses the principles of design to solve the problems of the poor. Just as the Procter & Gambles (PG) and Motorolas (MOT) of the corporate world conduct extensive ethnographic research on consumers, Acumen finances companies that create systems from the bottom up. “Start with the individuals,” said founder Jacqueline Novogratz. “Build systems from their perspective. Really pay attention, and then see if they can scale.”

    Under Novogratz’s leadership, the New York-based fund manages $20 million in investments in companies that fall within three portfolios: health, water, and housing. It’s not a lot of money compared with any of the traditional venture funds in Silicon Valley. But Acumen’s goal is not to launch initial public offerings. Rather, Novogratz and her team are building prototypes for new business models that measure returns in social benefits as well as monetary rewards.

    “We are betting on entrepreneurs, we look for a strong management team,” said Brian Trelstad, Chief Investment Officer of the Acumen Fund. “We currently have US $20 million in investments in six countries. We hope to take that to US $100 million in the next five years. We are beginning to see a really rich pipeline developing in our investment countries and more high quality investment opportunities coming our way. We are looking for people who are passionate about their approach and who continue to build their business from the perspective of the people in need.”

    Larry Page and Sergey Brin, the founders of the successful search engine Google, started their philanthropic wing, Google.org, following Ebay’s example. They endowed Google.org with stock now worth about US $1 billion. Then they followed Omidyar’s example and set themselves up as a for-profit network.

    “In the old American business model, the relationships between a firm and its investors, bank, suppliers and customers tended to be very arm’s length,” says Annalee Saxenian, dean of UC Berkeley’s School of Information. “You would make a deal and report back after some specified period of time. The new business model is much more engaged. Everyone learns from one another, and there is a continuous flow of information. The firms are more specialized, but they see each other as collaborators.”

    The approach, just like in the pell mell pace of the computer industry, is relentless. Just as computer software and hardware manufacturers follow a constant improvement and innovation cycle, so can social entrepreneurs.

    Published: March 2007

    Resources

    • The Skoll Centre for Social Entrepreneurship at Oxford’s Said Business School, hosts the Skoll World Forum every year to promote entrepreneurial solutions to social problems.
    • Ashoka: Ashoka is the global association of the world’s leading social entrepreneurs. It identifies and invests in leading social entrepreneurs with innovative and practical ideas at the launch stage. They then receive a living stipend for three years to focus on their ideas.
    • Social Ventures Partners: While only focused on the Seattle, USA area, SVP offers a model that can be applied throughout the global South. The vision of the founders was to build a philanthropic organization using a venture capital model, where partners actively nurture their financial investments with guidance and resources.
    • Generation Investment Management: Started in 2004 with former US vice president Al Gore, they only focus on investments that are long-term, sustainable and that they really believe in.
    • Omidyar Network: Started by Ebay’s founders, it funds for-profits and non-profits who promote equal access to information, tools and opportunities, and encourage shared interests and a sense of ownership among participants.
    • Skoll Foundation: The mission of the Foundation is to seek out social entrepreneurs who are already implementing successful programs on a small scale, and then through three-year awards, support the continuation, replication or extension of the program. Issues funded are: tolerance and human rights, health, environmental sustainability, economic and social equity, institutional responsibility, and personal security.
    • SV2: Silicon Valley Social Venture Fund: A partnership of successful technology entrepreneurs, it pools funds to support social entrepreneurs by giving money and giving time – venture philanthropy.
    • Google.org: It uses the talent, technology and financial resources of the successful search engine to tackle global poverty.
    • Acumen Fund: A non-profit venture fund that invests in market-based solutions to global poverty. The Fund supports entrepreneurial approaches to developing affordable goods and services for the 4 billion people in the world who live on less than $4 a day.
    • TechnoServe: Helps budding entrepreneurs turn good business ideas into thriving enterprises. With funding from the Google Foundation, they are launching a Business Plan Competition and an Entrepreneurship Development Program in Ghana.

    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 2023