Tag Archives: Nate Berg

Futures exhibition/festival with fish skin fashion and more at the Smithsonian (Washington, DC), Nov. 20, 2021 to July 6, 2022

Fish leather

Before getting to Futures, here’s a brief excerpt from a June 11, 2021 Smithsonian Magazine exhibition preview article by Gia Yetikyel about one of the contributors, Elisa Palomino-Perez (Note: A link has been removed),

Elisa Palomino-Perez sheepishly admits to believing she was a mermaid as a child. Growing up in Cuenca, Spain in the 1970s and ‘80s, she practiced synchronized swimming and was deeply fascinated with fish. Now, the designer’s love for shiny fish scales and majestic oceans has evolved into an empowering mission, to challenge today’s fashion industry to be more sustainable, by using fish skin as a material.

Luxury fashion is no stranger to the artist, who has worked with designers like Christian Dior, John Galliano and Moschino in her 30-year career. For five seasons in the early 2000s, Palomino-Perez had her own fashion brand, inspired by Asian culture and full of color and embroidery. It was while heading a studio for Galliano in 2002 that she first encountered fish leather: a material made when the skin of tuna, cod, carp, catfish, salmon, sturgeon, tilapia or pirarucu gets stretched, dried and tanned.

The history of using fish leather in fashion is a bit murky. The material does not preserve well in the archeological record, and it’s been often overlooked as a “poor person’s” material due to the abundance of fish as a resource. But Indigenous groups living on coasts and rivers from Alaska to Scandinavia to Asia have used fish leather for centuries. Icelandic fishing traditions can even be traced back to the ninth century. While assimilation policies, like banning native fishing rights, forced Indigenous groups to change their lifestyle, the use of fish skin is seeing a resurgence. Its rise in popularity in the world of sustainable fashion has led to an overdue reclamation of tradition for Indigenous peoples.

In 2017, Palomino-Perez embarked on a PhD in Indigenous Arctic fish skin heritage at London College of Fashion, which is a part of the University of the Arts in London (UAL), where she received her Masters of Arts in 1992. She now teaches at Central Saint Martins at UAL, while researching different ways of crafting with fish skin and working with Indigenous communities to carry on the honored tradition.

Yetikyel’s article is fascinating (apparently Nike has used fish leather in one of its sports shoes) and I encourage you to read her June 11, 2021 article, which also covers the history of fish leather use amongst indigenous peoples of the world.

I did some digging and found a few more stories about fish leather. The earlier one is a Canadian Broadcasting Corporation (CBC) November 16, 2017 online news article by Jane Adey,

Designer Arndis Johannsdottir holds up a stunning purse, decorated with shiny strips of gold and silver leather at Kirsuberjatred, an art and design store in downtown Reykjavik, Iceland.

The purse is one of many in a colourful window display that’s drawing in buyers.

Johannsdottir says customers’ eyes often widen when they discover the metallic material is fish skin. 

Johannsdottir, a fish-skin designing pioneer, first came across the product 35 years ago.

She was working as a saddle smith when a woman came into her shop with samples of fish skin her husband had tanned after the war. Hundreds of pieces had been lying in a warehouse for 40 years.

“Nobody wanted it because plastic came on the market and everybody was fond of plastic,” she said.

“After 40 years, it was still very, very strong and the colours were beautiful and … I fell in love with it immediately.”

Johannsdottir bought all the skins the woman had to offer, gave up saddle making and concentrated on fashionable fish skin.

Adey’s November 16, 2017 article goes on to mention another Icelandic fish leather business looking to make fish leather a fashion staple.

Chloe Williams’s April 28, 2020 article for Hakkai Magazine explores the process of making fish leather and the new interest in making it,

Tracy Williams slaps a plastic cutting board onto the dining room table in her home in North Vancouver, British Columbia. Her friend, Janey Chang, has already laid out the materials we will need: spoons, seashells, a stone, and snack-sized ziplock bags filled with semi-frozen fish. Williams says something in Squamish and then translates for me: “You are ready to make fish skin.”

Chang peels a folded salmon skin from one of the bags and flattens it on the table. “You can really have at her,” she says, demonstrating how to use the edge of the stone to rub away every fiber of flesh. The scales on the other side of the skin will have to go, too. On a sockeye skin, they come off easily if scraped from tail to head, she adds, “like rubbing a cat backwards.” The skin must be clean, otherwise it will rot or fail to absorb tannins that will help transform it into leather.

Williams and Chang are two of a scant but growing number of people who are rediscovering the craft of making fish skin leather, and they’ve agreed to teach me their methods. The two artists have spent the past five or six years learning about the craft and tying it back to their distinct cultural perspectives. Williams, a member of the Squamish Nation—her ancestral name is Sesemiya—is exploring the craft through her Indigenous heritage. Chang, an ancestral skills teacher at a Squamish Nation school, who has also begun teaching fish skin tanning in other BC communities, is linking the craft to her Chinese ancestry.

Before the rise of manufactured fabrics, Indigenous peoples from coastal and riverine regions around the world tanned or dried fish skins and sewed them into clothing. The material is strong and water-resistant, and it was essential to survival. In Japan, the Ainu crafted salmon skin into boots, which they strapped to their feet with rope. Along the Amur River in northeastern China and Siberia, Hezhen and Nivkh peoples turned the material into coats and thread. In northern Canada, the Inuit made clothing, and in Alaska, several peoples including the Alutiiq, Athabascan, and Yup’ik used fish skins to fashion boots, mittens, containers, and parkas. In the winter, Yup’ik men never left home without qasperrluk—loose-fitting, hooded fish skin parkas—which could double as shelter in an emergency. The men would prop up the hood with an ice pick and pin down the edges to make a tent-like structure.

On a Saturday morning, I visit Aurora Skala in Saanich on Vancouver Island, British Columbia, to learn about the step after scraping and tanning: softening. Skala, an anthropologist working in language revitalization, has taken an interest in making fish skin leather in her spare time. When I arrive at her house, a salmon skin that she has tanned in an acorn infusion—a cloudy, brown liquid now resting in a jar—is stretched out on the kitchen counter, ready to be worked.

Skala dips her fingers in a jar of sunflower oil and rubs it on her hands before massaging it into the skin. The skin smells only faintly of fish; the scent reminds me of salt and smoke, though the skin has been neither salted nor smoked. “Once you start this process, you can’t stop,” she says. If the skin isn’t worked consistently, it will stiffen as it dries.

Softening the leather with oil takes about four hours, Skala says. She stretches the skin between clenched hands, pulling it in every direction to loosen the fibers while working in small amounts of oil at a time. She’ll also work her skins across other surfaces for extra softening; later, she’ll take this piece outside and rub it back and forth along a metal cable attached to a telephone pole. Her pace is steady, unhurried, soothing. Back in the day, people likely made fish skin leather alongside other chores related to gathering and processing food or fibers, she says. The skin will be done when it’s soft and no longer absorbs oil.

Onto the exhibition.

Futures (November 20, 2021 to July 6, 2022 at the Smithsonian)

A February 24, 2021 Smithsonian Magazine article by Meilan Solly serves as an announcement for the Futures exhibition/festival (Note: Links have been removed),

When the Smithsonian’s Arts and Industries Building (AIB) opened to the public in 1881, observers were quick to dub the venue—then known as the National Museum—America’s “Palace of Wonders.” It was a fitting nickname: Over the next century, the site would go on to showcase such pioneering innovations as the incandescent light bulb, the steam locomotive, Charles Lindbergh’s Spirit of St. Louis and space-age rockets.

“Futures,” an ambitious, immersive experience set to open at AIB this November, will act as a “continuation of what the [space] has been meant to do” from its earliest days, says consulting curator Glenn Adamson. “It’s always been this launchpad for the Smithsonian itself,” he adds, paving the way for later museums as “a nexus between all of the different branches of the [Institution].” …

Part exhibition and part festival, “Futures”—timed to coincide with the Smithsonian’s 175th anniversary—takes its cue from the world’s fairs of the 19th and 20th centuries, which introduced attendees to the latest technological and scientific developments in awe-inspiring celebrations of human ingenuity. Sweeping in scale (the building-wide exploration spans a total of 32,000 square feet) and scope, the show is set to feature historic artifacts loaned from numerous Smithsonian museums and other institutions, large-scale installations, artworks, interactive displays and speculative designs. It will “invite all visitors to discover, debate and delight in the many possibilities for our shared future,” explains AIB director Rachel Goslins in a statement.

“Futures” is split into four thematic halls, each with its own unique approach to the coming centuries. “Futures Past” presents visions of the future imagined by prior generations, as told through objects including Alexander Graham Bell’s experimental telephone, an early android and a full-scale Buckminster Fuller geodesic dome. “In hindsight, sometimes [a prediction is] amazing,” says Adamson, who curated the history-centric section. “Sometimes it’s sort of funny. Sometimes it’s a little dismaying.”

Futures That Work” continues to explore the theme of technological advancement, but with a focus on problem-solving rather than the lessons of the past. Climate change is at the fore of this section, with highlighted solutions ranging from Capsula Mundi’s biodegradable burial urns to sustainable bricks made out of mushrooms and purely molecular artificial spices that cut down on food waste while preserving natural resources.

Futures That Inspire,” meanwhile, mimics AIB’s original role as a place of wonder and imagination. “If I were bringing a 7-year-old, this is probably where I would take them first,” says Adamson. “This is where you’re going to be encountering things that maybe look a bit more like science fiction”—for instance, flying cars, self-sustaining floating cities and Afrofuturist artworks.

The final exhibition hall, “Futures That Unite,” emphasizes human relationships, discussing how connections between people can produce a more equitable society. Among others, the list of featured projects includes (Im)possible Baby, a speculative design endeavor that imagines what same-sex couples’ children might look like if they shared both parents’ DNA, and Not The Only One (N’TOO), an A.I.-assisted oral history project. [all emphases mine]

I haven’t done justice to Solly’s February 24, 2021 article, which features embedded images and offers a more hopeful view of the future than is currently the fashion.

Futures asks: Would you like to plan the future?

Nate Berg’s November 22, 2021 article for Fast Company features an interactive urban planning game that’s part of the Futures exhibition/festival,

The Smithsonian Institution wants you to imagine the almost ideal city block of the future. Not the perfect block, not utopia, but the kind of urban place where you get most of what you want, and so does everybody else.

Call it urban design by compromise. With a new interactive multiplayer game, the museum is hoping to show that the urban spaces of the future can achieve mutual goals only by being flexible and open to the needs of other stakeholders.

The game is designed for three players, each in the role of either the city’s mayor, a real estate developer or an ecologist. The roles each have their own primary goals – the mayor wants a well-served populace, the developer wants to build successful projects, and the ecologist wants the urban environment to coexist with the natural environment. Each role takes turns adding to the block, either in discrete projects or by amending what another player has contributed. Options are varied, but include everything from traditional office buildings and parks to community centers and algae farms. The players each try to achieve their own goals on the block, while facing the reality that other players may push the design in unexpected directions. These tradeoffs and their impact on the block are explained by scores on four basic metrics: daylight, carbon footprint, urban density, and access to services. How each player builds onto the block can bring scores up or down.

To create the game, the Smithsonian teamed up with Autodesk, the maker of architectural design tools like AutoCAD, an industry standard. Autodesk developed a tool for AI-based generative design that offers up options for a city block’s design, using computing power to make suggestions on what could go where and how aiming to achieve one goal, like boosting residential density, might detract from or improve another set of goals, like creating open space. “Sometimes you’ll do something that you think is good but it doesn’t really help the overall score,” says Brian Pene, director of emerging technology at Autodesk. “So that’s really showing people to take these tradeoffs and try attributes other than what achieves their own goals.” The tool is meant to show not how AI can generate the perfect design, but how the differing needs of various stakeholders inevitably require some tradeoffs and compromises.

Futures online and in person

Here are links to Futures online and information about visiting in person,

For its 175th anniversary, the Smithsonian is looking forward.

What do you think of when you think of the future? FUTURES is the first building-wide exploration of the future on the National Mall. Designed by the award-winning Rockwell Group, FUTURES spans 32,000 square feet inside the Arts + Industries Building. Now on view until July 6, 2022, FUTURES is your guide to a vast array of interactives, artworks, technologies, and ideas that are glimpses into humanity’s next chapter. You are, after all, only the latest in a long line of future makers.

Smell a molecule. Clean your clothes in a wetland. Meditate with an AI robot. Travel through space and time. Watch water being harvested from air. Become an emoji. The FUTURES is yours to decide, debate, delight. We invite you to dream big, and imagine not just one future, but many possible futures on the horizon—playful, sustainable, inclusive. In moments of great change, we dare to be hopeful. How will you create the future you want to live in?

Happy New Year!

Concrete collapse and research into durability

I have two items about concrete buildings, one concerns the June 24, 2021 collapse of a 12-storey condominium building in Surfside, close to Miami Beach in Florida. There are at least 20 people dead and, I believe, over 120 are still unaccounted for (July 2, 2021 Associated Press news item on Canadian Broadcasting Corporation news online website).

Miami collapse

Nate Berg’s June 25, 2021 article for Fast Company provides an instructive overview of the building collapse (Note: A link has been removed),

Why the building collapsed is not yet known [emphasis mine]. David Darwin is a professor of civil engineering at the University of Kansas and an expert in reinforced concrete structures, and he says the eventual investigation of the Surfside collapse will explore all the potential causes, ranging from movement in the foundation before the collapse, corrosion in the debris, and excessive cracking in the part of the building that remains standing. “There are all sorts of potential causes of failure,” Darwin says. “At this point, speculation is not helpful for anybody.”

Sometimes I can access the entire article, and at other times, only a few paragraphs; I hope you get access to all of it as it provides a lot of information.

The Surfside news puts this research from Northwestern University (Chicago, Illinois) into much sharper relief than might otherwise be the case. (Further on I have some information about the difference between cement and concrete and how cement leads to concrete.)

Smart cement for more durable roads and cities

Coincidentally, just days before the Miami Beach building collapse, a June 21, 2021 Northwestern University news release (also on EurekAlert), announced research into improving water and fracture resistance in cement,

Forces of nature have been outsmarting the materials we use to build our infrastructure since we started producing them. Ice and snow turn major roads into rubble every year; foundations of houses crack and crumble, in spite of sturdy construction. In addition to the tons of waste produced by broken bits of concrete, each lane-mile of road costs the U.S. approximately $24,000 per year to keep it in good repair.

Engineers tackling this issue with smart materials typically enhance the function of materials by increasing the amount of carbon, but doing so makes materials lose some mechanical performance. By introducing nanoparticles into ordinary cement, Northwestern University researchers have formed a smarter, more durable and highly functional cement.

The research was published today (June 21 [2021]) in the journal Philosophical Transactions of the Royal Society A.

With cement being the most widely consumed material globally and the cement industry accounting for 8% of human-caused greenhouse gas emissions, civil and environmental engineering professor Ange-Therese Akono turned to nanoreinforced cement to look for a solution. Akono, the lead author on the study and an assistant professor in the McCormick School of Engineering, said nanomaterials reduce the carbon footprint of cement composites, but until now, little was known about its impact on fracture behavior.

“The role of nanoparticles in this application has not been understood before now, so this is a major breakthrough,” Akono said. “As a fracture mechanics expert by training, I wanted to understand how to change cement production to enhance the fracture response.”

Traditional fracture testing, in which a series of light beams is cast onto a large block of material, involves lots of time and materials and seldom leads to the discovery of new materials.

By using an innovative method called scratch testing, Akono’s lab efficiently formed predictions on the material’s properties in a fraction of the time. The method tests fracture response by applying a conical probe with increasing vertical force against the surface of microscopic bits of cement. Akono, who developed the novel method during her Ph.D. work, said it requires less material and accelerates the discovery of new ones.

“I was able to look at many different materials at the same time,” Akono said. “My method is applied directly at the micrometer and nanometer scales, which saves a considerable amount of time. And then based on this, we can understand how materials behave, how they crack and ultimately predict their resistance to fracture.”

Predictions formed through scratch tests also allow engineers to make changes to materials that enhance their performance at the larger scale. In the paper, graphene nanoplatelets, a material rapidly gaining popularity in forming smart materials, were used to improve the resistance to fracture of ordinary cement. Incorporating a small amount of the nanomaterial also was shown to improve water transport properties including pore structure and water penetration resistance, with reported relative decreases of 76% and 78%, respectively.

Implications of the study span many fields, including building construction, road maintenance, sensor and generator optimization and structural health monitoring.

By 2050, the United Nations predicts two-thirds of the world population will be concentrated in cities. Given the trend toward urbanization, cement production is expected to skyrocket.

Introducing green concrete that employs lighter, higher-performing cement will reduce its overall carbon footprint by extending maintenance schedules and reducing waste.

Alternately, smart materials allow cities to meet the needs of growing populations in terms of connectivity, energy and multifunctionality. Carbon-based nanomaterials including graphene nanoplatelets are already being considered in the design of smart cement-based sensors for structural health monitoring.

Akono said she’s excited for both follow-ups to the paper in her own lab and the ways her research will influence others. She’s already working on proposals that look into using construction waste to form new concrete and is considering “taking the paper further” by increasing the fraction of nanomaterial that cement contains.

“I want to look at other properties like understanding the long-term performance,” Akono said. “For instance, if you have a building made of carbon-based nanomaterials, how can you predict the resistance in 10, 20 even 40 years?”

The study, “Fracture toughness of one- and two-dimensional nanoreinforced cement via scratch testing,” was supported by the National Science Foundation Division of Civil, Mechanical and Manufacturing Innovation (award number 18929101).

Akono will give a talk on the paper at The Royal Society’s October [2021] meeting, “A Cracking Approach to Inventing Tough New Materials: Fracture Stranger Than Friction,” which will highlight major advances in fracture mechanics from the past century.

I don’t often include these kinds of photos (one or more of the researchers posing (sometimes holding something) for the camera but I love the professor’s first name, Ange-Therese (which means angel in French, I don’t know if she ever uses the French spelling for Thérèse),

Caption: Professor Ange-Therese Akono holds a sample of her smart cement. Credit: Northwestern University

Here’s a link to and a citation for the paper,

Fracture toughness of one- and two-dimensional nanoreinforced cement via scratch testing by Ange-Therese Akono. Philosophical Transactions of the Royal Society A: Mathematical, Physical & Engineering Sciences 2021 379 (2203): 20200288 DOI: 10.1098/rsta.2020.0288 Published June 21, 2021

This paper appears to be open access.

Cement vs. concrete

Andrew Logan’s April 3, 2020 article for MIT (Massachusetts Institute of Technology) News is a very readable explanation of how cement and concrete differ and how they are related,

There’s a lot the average person doesn’t know about concrete. For example, it’s porous; it’s the world’s most-used material after water; and, perhaps most fundamentally, it’s not cement.

Though many use “cement” and “concrete” interchangeably, they actually refer to two different — but related — materials: Concrete is a composite made from several materials, one of which is cement. [emphasis mine]

Cement production begins with limestone, a sedimentary rock. Once quarried, it is mixed with a silica source, such as industrial byproducts slag or fly ash, and gets fired in a kiln at 2,700 degrees Fahrenheit. What comes out of the kiln is called clinker. Cement plants grind clinker down to an extremely fine powder and mix in a few additives. The final result is cement.

“Cement is then brought to sites where it is mixed with water, where it becomes cement paste,” explains Professor Franz-Josef Ulm, faculty director of the MIT Concrete Sustainability Hub (CSHub). “If you add sand to that paste it becomes mortar. And if you add to the mortar large aggregates — stones of a diameter of up to an inch — it becomes concrete.”

Final thoughts

I offer my sympathies to the folks affected by the building collapse and my hopes that research will lead the way to more durable cement and, ultimately, concrete buildings.