Tag: technology

New Ultrathin Capacitor Could Enable Energy-Efficient Microchips

Scientists turn century-old material into a thin film for next-gen memory and logic devices

[from Berkeley Lab, by Rachel Berkowitz]

Electron microscope images show the precise atom-by-atom structure of a barium titanate (BaTiO3) thin film sandwiched between layers of strontium ruthenate (SrRuO3) metal to make a tiny capacitor. (Credit: Lane Martin/Berkeley Lab)

The silicon-based computer chips that power our modern devices require vast amounts of energy to operate. Despite ever-improving computing efficiency, information technology is projected to consume around 25% of all primary energy produced by 2030. Researchers in the microelectronics and materials sciences communities are seeking ways to sustainably manage the global need for computing power.

The holy grail for reducing this digital demand is to develop microelectronics that operate at much lower voltages, which would require less energy and is a primary goal of efforts to move beyond today’s state-of-the-art CMOS (complementary metal–oxide semiconductor) devices.

Non-silicon materials with enticing properties for memory and logic devices exist; but their common bulk form still requires large voltages to manipulate, making them incompatible with modern electronics. Designing thin-film alternatives that not only perform well at low operating voltages but can also be packed into microelectronic devices remains a challenge.

Now, a team of researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) and UC Berkeley have identified one energy-efficient route—by synthesizing a thin-layer version of a well-known material whose properties are exactly what’s needed for next-generation devices.

First discovered more than 80 years ago, barium titanate (BaTiO3) found use in various capacitors for electronic circuits, ultrasonic generators, transducers, and even sonar.

Crystals of the material respond quickly to a small electric field, flip-flopping the orientation of the charged atoms that make up the material in a reversible but permanent manner even if the applied field is removed. This provides a way to switch between the proverbial “0” and “1” states in logic and memory storage devices—but still requires voltages larger than 1,000 millivolts (mV) for doing so.

Seeking to harness these properties for use in microchips, the Berkeley Lab-led team developed a pathway for creating films of BaTiO3 just 25 nanometers thin—less than a thousandth of a human hair’s width—whose orientation of charged atoms, or polarization, switches as quickly and efficiently as in the bulk version.

“We’ve known about BaTiO3 for the better part of a century and we’ve known how to make thin films of this material for over 40 years. But until now, nobody could make a film that could get close to the structure or performance that could be achieved in bulk,” said Lane Martin, a faculty scientist in the Materials Sciences Division (MSD) at Berkeley Lab and professor of materials science and engineering at UC Berkeley who led the work.

Historically, synthesis attempts have resulted in films that contain higher concentrations of “defects”—points where the structure differs from an idealized version of the material—as compared to bulk versions. Such a high concentration of defects negatively impacts the performance of thin films. Martin and colleagues developed an approach to growing the films that limits those defects. The findings were published in the journal Nature Materials.

To understand what it takes to produce the best, low-defect BaTiO3 thin films, the researchers turned to a process called pulsed-laser deposition. Firing a powerful beam of an ultraviolet laser light onto a ceramic target of BaTiO3 causes the material to transform into a plasma, which then transmits atoms from the target onto a surface to grow the film. “It’s a versatile tool where we can tweak a lot of knobs in the film’s growth and see which are most important for controlling the properties,” said Martin.

Martin and his colleagues showed that their method could achieve precise control over the deposited film’s structure, chemistry, thickness, and interfaces with metal electrodes. By chopping each deposited sample in half and looking at its structure atom by atom using tools at the National Center for Electron Microscopy at Berkeley Lab’s Molecular Foundry, the researchers revealed a version that precisely mimicked an extremely thin slice of the bulk.

“It’s fun to think that we can take these classic materials that we thought we knew everything about, and flip them on their head with new approaches to making and characterizing them,” said Martin.

Finally, by placing a film of BaTiO3 in between two metal layers, Martin and his team created tiny capacitors—the electronic components that rapidly store and release energy in a circuit. Applying voltages of 100 mV or less and measuring the current that emerges showed that the film’s polarization switched within two billionths of a second and could potentially be faster—competitive with what it takes for today’s computers to access memory or perform calculations.

The work follows the bigger goal of creating materials with small switching voltages, and examining how interfaces with the metal components necessary for devices impact such materials. “This is a good early victory in our pursuit of low-power electronics that go beyond what is possible with silicon-based electronics today,” said Martin.

“Unlike our new devices, the capacitors used in chips today don’t hold their data unless you keep applying a voltage,” said Martin. And current technologies generally work at 500 to 600 mV, while a thin film version could work at 50 to 100 mV or less. Together, these measurements demonstrate a successful optimization of voltage and polarization robustness—which tend to be a trade-off, especially in thin materials.

Next, the team plans to shrink the material down even thinner to make it compatible with real devices in computers and study how it behaves at those tiny dimensions. At the same time, they will work with collaborators at companies such as Intel Corp. to test the feasibility in first-generation electronic devices. “If you could make each logic operation in a computer a million times more efficient, think how much energy you save. That’s why we’re doing this,” said Martin.

This research was supported by the U.S. Department of Energy (DOE) Office of Science. The Molecular Foundry is a DOE Office of Science user facility at Berkeley Lab.

Countries and Deep Patternings: China

China’s High-Level Equilibrium Trap as a Concept

The Pattern of the Chinese Past
Mark Elvin
Paperback: 348 pages
Publisher: Stanford University Press; 1st edition (June 1, 1973)

The 1973 classic work in Sinology, Mark Elvin’s The Pattern of the Chinese Past gives the student an “exemplum” in the kind of scholarship that might be called “pattern-seeking.” Without such attempts, all of history becomes formless and shapeless and an endless parade of “routs and rallies,” and “crimes and follies and misfortunes” (in Edward Gibbon’s catchphrase).

Professor Elvin renders Chinese history through an economic perspective instead of using the common dynastic classification by attempting to answer three questions:

  1. What contributed to the continuity of the Chinese empire?
  2. Why was the Chinese economy the most advanced in the world from the Song dynasty (960-1279) up until the latter half of the Qing dynasty (mid-1800s)?
  3. Why did China fail to maintain her technological advantage after the mid-fourteenth century while advancing economically?

In the first section of the book, the author elucidates the staying power of the Chinese empire was due to the following factors. The economics of defense in relation to the size of empire and the power of its neighbors never became an extreme burden that it rendered the state impotent for any consecutively long period of time. It was always able to reformulate itself after a short disunity or rule by a foreign power of the whole, which only happened twice within a two thousand year period (Mongol and Manchu rule). Two other factors that contributed to the continuity of the Chinese state include a relatively isolated existence from the rest of the Eurasian landmass and the important placed on cultural unity, beginning with the first emperor’s destruction of local records in order to quell local loyalties (pp. 21-22). Both of these factors had been built up over time through a revolution in communication and transportation.

The second section of the book analyses the causes of the economic revolution that occurred between the 8th and 12th centuries and the technological growth that accompanied it. The transformation of agriculture, especially in the south, was the major impetus that fueled the economic growth of this period. This revolution in agriculture had four aspects.

  1. The preparation of soil became more effective as a result of improved or new tools and the extensive use of manure and lime as fertilizer.
  2. Seed improvements allowed for double cropping.
  3. Improvements in hydraulic techniques and irrigation networks.
  4. Specialization in crops other than basic food grains (p.118).

Improvements in transportation and communications were almost as important as agriculture in growing the economy. Water transport saw big gains and led to the golden age of geographic studies and cartography, with envoys traveling as far away as Africa. Money and credit matured during this time helping to expand the economy. Paper money made its first appearance in 1024. Improvements in science, medicine, and technology also occurred during this period. However, despite all these advancements, “this period was the climax and also the end of many preceding centuries of scientific and technical progress” (p. 179). Although the Chinese economy continued to advance from the 14th century on, albeit on a smaller scale, it was not accompanied by improvements in technology.

The last section deals with this phenomenon, describing the distinctive characteristics of this late traditional period (1300-1800), and then proceeding to point out why technological advancements did not keep pace with the growth in the economy. This period sees a rise of small market towns in the sixteenth century and a decline in contact with the non-Chinese world around the middle of the fifteenth century. Also, by the eighteenth century serfdom disappeared, aiding population growth, which had reached 400 million by the mid-1800s. Elvin interestingly points out that the highly sophisticated metaphysics that evaded Chinese intellectual thought during the Ming and Qing dynasties negated any deep scientific inquiry (p. 233). In the attempt to explain the lack of technological advancement, Elvin disputes a number of conventional explanations. Contrary to popular belief, there was enough capital during this period to finance simple technological advances, also there was minimal political obstacles to economic growth.

In short, Elvin believes “that in late traditional China economic forces developed in such a way as to make profitable invention more and more difficult. With falling surplus in agriculture, and so falling per capita income and per capita demand, with cheapening labor but increasingly expensive resources and capital, with farming and transport technologies so good that no simple improvements could be made, rational strategy for peasants and merchants alike tended in the direction not so much of labor-saving machinery as of economizing on resources and fixed capital. Huge but nearly static markets created no bottlenecks in the production system that might have prompted creativity” (p. 314). This condition is what he terms as a “high-level equilibrium trap.” The term “trap” to describe the condition of late imperial China’s technological advancement in relation to the economy is similar to Escape from Predicament, Thomas Metzger’s analysis of the “predicament” that confronted Chinese intellectual thought from the Song through to the end of the Qing dynasty. Both explanations have at their core the idea of late imperial China not being able to generate real sustainable progress internally, stating that it was the Chinese response to the Western threat in the mid to late 1800s that finally brought the needed change.

WANG Huiyao: To Save Global Trade, Start Small

[from the Center for China and Globalization]

by WANG Huiyao (王辉耀), Founder of the Center for China and Globalization

The global economy is being rocked by war, sanctions and spiraling commodity prices—not to mention the ongoing strain of the pandemic, geopolitical tensions and climate change. These compounding risks present a serious challenge to the system of open trade that the World Trade Organization was designed to uphold. But it also offers a chance for the beleaguered organization, which is holding its first ministerial conference since 2017, to prove its continuing relevance.

The WTO has traditionally focused on combating protectionism—measures designed to insulate producers from international competition. Now, though, the biggest threats to free trade come from policies meant to safeguard national security and protect citizens from risks, such as those related to health, the environment or digital spaces.

Former WTO Director-General Pascal Lamy has called this growing use of export controls, cybersecurity laws, investment blacklists, reshoring incentives and the like “precautionism.” It’s been on the rise since the start of the pandemic, when many countries moved to restrict exports of medical supplies and other essentials. COVID-19 has also raised concerns about the vulnerability of supply chains, particularly those dependent on geopolitical rivals.

The world’s two biggest trading nations, the United States and China, have both engaged in precautionism. The U.S. is actively pursuing a policy of “friend-shoring”—shifting trade flows from potentially hostile countries to friendlier ones. China’s “dual circulation” strategy aims in part to reduce dependence on foreign imports, especially technology, while its government has long imposed limits on data flows in and out of the country.

With Russia’s invasion of Ukraine, the momentum toward friend-shoring has grown. Meanwhile, food shortages and surging prices have triggered another round of precautionary measures: Since the war began, 63 countries have imposed a more than 100 export restrictions on fertilizer and foodstuffs.

While the impulse driving such policies is understandable, the trend could cause great harm if allowed to run unchecked. It will increase inflation and depress global growth, especially if it involves costly redeployment of supply chains away from efficient producers such as China. A recent WTO study estimated that decoupling the global economy into “Western” and “Eastern” blocs would wipe out nearly 5% in output, the equivalent of $4 trillion.

As a recent study by the International Monetary Fund points out, the way to make global value chains more resilient is to diversify, not dismantle them. Turning away from open trade will only make states more vulnerable to economic shocks such as war, disease or crop failures.

The WTO is an obvious vehicle to rally collective action on these issues. However, like other global institutions, it has been weakened by years of deadlock. At this week’s meeting, countries should start to build positive momentum with some small but symbolically significant breakthroughs to show the WTO can still mobilize joint action.

Given current threats to food security, at the very least members should agree not to restrict exports of foodstuffs purchased for the World Food Programme. A step further would be a joint statement calling on members to keep trade in food and agricultural products open and avoid imposing unjustified export restrictions. There should also be closer coordination to smooth supply chains and clogged logistics channels.

Another low-hanging fruit is finally securing a  waiver covering intellectual property rights for COVID-19-related products. This proposal has languished for over 18 months but has now been redrafted to address concerns from the U.S. and European Union. Signing it would go some way to expanding global access to vaccines, which are still sorely needed in many parts of the world.

Beyond this week, the WTO secretariat and members need to develop a work program to reform the organization. This should include developing a framework to ensure that if states do take precautionary measures, they do so in a transparent, rules-based manner that does not slide into more harmful forms of protectionism.

Reviving the WTO’s defunct dispute settlement mechanism is a clear priority. Twenty-five members have agreed to an interim arrangement that would function in a similar way. More members should join this agreement, ideally including the U.S., and start negotiating the full restoration of a binding mechanism. They should also set clear criteria for carveouts for legitimate precautionary measures related to national security, healthcare and environmental issues.

No one should expect big breakthroughs in Geneva. But practical agreements on immediate priorities such food security and vaccines would at least help to reassert the WTO’s relevance and show that the world’s trading partners are not simply going to give up on multilateralism. At this dangerous moment, even small victories are welcome.

World-Watching: Shipping Problems Webinar

Solving SMB Shipping Problems with Technology — June 14th @ 2 PM EDT

[from FreightWaves]

The supply chain challenges we hear about today likely bear little resemblance to those we envisioned at the beginning of 2020. Ongoing disruption to the global supply chain has accelerated and heightened the need to focus on risk mitigation — or face even more critical concerns.

To uncover ways small and midsized (SMB) organizations can overcome tech adoption challenges and continue to grow, FreightWaves has partnered with MyCarrier for a one-hour webinar at 2 PM EDT on Tuesday, June 14.

In this webinar, learn how SMB organizations can alleviate the pressure of industry volatility by utilizing technology to:

  1. Reduce shipping costs
  2. Maintain customer demands
  3. Source reliable capacity
  4. Ensure timely pick ups 
  5. Manage inventory
Speakers

Register for the webinar.

Wired Magazine and Charles Dickens

We think of the leading tech periodical Wired and we think of the internet and smartphone phase of technology innovation.

As always, there’s a wide-angle deeper view that helps you to avoid being “stranded in the present” (to use Professor Peter Fritzsche’s useful phrase and book title as a warning about the flaws of a no-overview sense of reality).

Think back to the famous Charles Dickens classic novel, Hard Times from 1854.

Chapter 11 of this novel talks about “electric wires.” Thus today’s copper wires and fiberoptics have a nineteenth century anticipation.

The end-notes on Hard Times inform us:

“…the wires of the telegraph which were becoming common as an adjunct to the railways from 1846-1847. During the French Wars the old wire-and-lever telegraphs had been set up between Whitehall and the main naval bases. The ‘galvanic’ telegraph had been invented by 1840, the idea of stretching the wires between tall posts by 1843, and by mid-1848 half the railways were so equipped.”

(Charles Dickens, Hard Times, Penguin Books, 1969, page 328)

The following added point will further elaborate on this chapter of the world’s wiring adding a larger comparative perspective:

The Victorian Internet: The Remarkable Story of the Telegraph and the Nineteenth Century’s On-Line Pioneers is a book by Tom Standage. First published in September 1998 through Walker & Company, the book discusses the development and uses of the electric telegraph during the second half of the 19th century and some of the similarities the telegraph shared with the Internet of the late 20th century.

The book’s central idea posits that of these two technologies, it was the telegraph that was the more significant, since the ability to communicate globally at all in real-time was a qualitative shift, while the change brought on by the modern Internet was merely a quantitative shift according to Standage, though, by the same token, global communication was just a quantitative shift from long-distance communication.

The book describes to general readers how some of the uses of telegraph in commercial, military, and social communication were, in a sense, analogous to modern uses for the Internet. A few rather unusual stories are related, about couples who fell in love and even married over the wires, criminals who were caught through the telegraph, etc. The culture which developed between telegraph operators also had some rather unexpected affinities with the Internet. Both cultures made or make use of complex text coding and abbreviated language slang, both required network security experts, and both attracted criminals who used the networks to commit fraud, hack private communications, and send unwanted messages.

Climatology-Watching: Tyndall Centre for Climate Change Research

[from Tyndall Centre for Climate Change Research]

UK’s climate change readiness has made ‘significant progress’

by Renee Karunungan on May 4, 2022

There is significant progress in the UK for reporting and implementing climate change adaptation, according to a new study led by Tyndall UEA’s Katie Jenkins. Katie has created an Adaptation Inventory of adaptation actions happening based on official records of adaptation projects being implemented by both public and private sector, accompanied by  a systematic review of the peer-reviewed literature of adaptation case studies.

Adapting to climate change means taking action to prepare for and adjust to current and predicted effects of climate change. Adaptation plays an important role in managing past, present and future climate risk and impacts. However, there is an “adaptation gap” where the distance between existing adaptation efforts versus adaptation needs is widening, according to the United Nations Environment Programme’s Adaptation Gap Report. Tracking national adaptation plans is deemed critical to support future decision-making and drive future actions.

Studies of adaptation consider the UK at the forefront of adaptation planning, setting an early example with the Climate Change Act 2008 which contains a five-year cycle of adaptation planning, published as the UK Climate Change Risk Assessment. Evidence from the UK Climate Change Committee shows that adaptation action has failed to keep pace with increasing climate risks. 

According to the Committee’s assessment, adaptation planning for 2C and 4C global warming is not happening, and that the gap between future risks and planned adaptation has widened, delivering the minimum level of resilience.

Katie’s new Adaptation Inventory provides insight on what is currently being implemented, which helps policymakers and practitioners learn from existing knowledge and practical case studies.

“The Adaptation Inventory provides a consistent and easily searchable database which will continue to evolve. It can provide evidence on the specific types of adaptation implemented on the ground as well as provide more detailed insight into the specific examples of action being implemented. This has the potential to help and inform UK-based decision-making,” Katie said.

The Adaptation Inventory identifies and documents current and planned adaptation in the UK, and how it is being implemented through adaptation actions, the sectors where adaptation is occurring, and where the gaps remain. There were 360 adaptation actions identified in the Inventory, comprising 134 adaptation types. Out of these 360 adaptation actions, 80% have already been implemented.

The private sector accounts for 74% of the actions with water companies dominating. Regulatory frameworks, standards, and reporting requirements are key drivers required by water companies by the Regulator. For example, water companies are already required to plan their resilience to drought.

The most common types of adaptation actions are flood protection (12%), leakage reduction (4%), water metering (3%), property level flood protection (3%), operational improvements (3%), and back-up generators (3%). Most actions were categorized as structural and physical interventions. Other interventions were categorized as technological and ecosystem based. 

An example of a structural adaptation action is raising boat landings to address higher tides because of rising sea levels. For an example of technology, London Transport has installed air cooling units and mechanical chillers at two key busy tube stations to address heat stress. An ecosystem-based example  introduces barley straw to reservoirs to control blue green algae, more common with warmer summers.

The Adaptation Inventory also looks at the types of climate hazards being addressed. It found that 76% of the actions were in response to drought, 26% for extreme rainfall, 13% for flooding, and 11% for higher temperatures. One example of adaptation for drought is rainwater recovery using storage facilities available on the site, reducing the demand for fresh water during drought. For alleviating flooding, a water company is using afforestation. The London Underground has doubled the capacity of ventilation shafts on the Victoria line, which provide more air flow on hot days.

Emerson on Education

The entire approach to education or re-education presented here can be fruitfully thought of in terms of this journal entry (dated July 15? 1831) from the journals of Ralph Waldo Emerson:

“The things taught in schools & colleges are not an education but the means of education…”

(Emerson in his Journals, 1982, selected and edited by Joel Porte, Harvard University Press, page 79)

This insight on education comports well with the approach we are taking here: courses and majors, lectures and tests, grades and discussions are “raw material” for a more composite understanding or perhaps understandings “in motion” as one goes through life. This is true whether you major in English lit. or polymer chemistry.

This Emersonian insight is what is missing from campuses and schoolyards and what we are exploring here. Pedagogy can’t be on the right track without this sense of “parts and wholes” where the raw material of school is a “component” of something that includes the larger context of your life as a person as well as student and paradoxically, the whole “surround” of global commerce and the techno-commercial world which cannot be hidden away in specialized schools such as business schools (say, Harvard Business School). You are “in” all of these dimensions and storms and some tentative integration must be attempted.

Every student is a a person who is born, lives, and dies. This takes place in a world-system of global finance, technology, trade, tensions.

Deep education shows the student that the ongoing “amalgamation” of all of these dimensions is where real and deep education lies. Everything else (ie as done now) is a kind of “perfect myopia.”

This is how we implement Emerson’s point from his Journals, given above.

Science and Its Discontents: The Case of Natsume Sōseki (夏目 漱石) in Japan

Natsume Sōseki (夏目 漱石) is and was the most prestigious and respected novelist in modern Japan and every student has to engage with such novels of his as Botchan (坊っちゃん, “Young Master”) and Kokoro (こゝろ, or in post-war orthography こころ, “Heart”). Sōseki died in 1916.

Sōseki’s feeling that the modern world is some kind of runaway train with no brakes is expressed clearly in his 1913 novel, Kōjin (行人 , “The Wayfarer”).

One of Sōseki’s dialogues in the novel is about the current science and technology world, which was quite visible already then, and has a very nerve-racking or frightening tempo of a turbulent tsunami.

One character says:

“Now what you call insecurity is the insecurity of the entire human race, and it isn’t peculiar to you alone. Constant motion and flow is our very fate.

“Man’s insecurity stems from the advance of science. Never once has science, which never ceases to move forward, allowed us to pause. From walking to ricksha, from ricksha to carriage, from carriage to train, from train to automobile, from there on to the dirigible, further on to the airplane, and further on and on, no matter how far we may go, it won’t let us take a breath. How far it will sweep us along, nobody knows for sure. It is really frightening.”

Yes, it is frightening, indeed, I agreed.

“It is frightening because the fate that the whole of humanity will reach in several centuries, I must go through—in my own lifetime—and at that all alone. That’s why it is frightening. In short, I gather within myself the whole insecurity of the human race, and distill that insecurity down into every moment, that is the fright that I am experiencing.”

(Natsume Sōseki, Kōjin [行人], Charles E. Tuttle Company, 1991, 9th printing, page 285)

Comment: There’s no need to dismiss these feelings as Luddite. They represent a reaction to the vertiginous or dizzying pace of the modern techno-protean change machine with no pause button.

Notice that Sōseki’s life (1867-1916) is basically congruent with Globalization I (i.e., the period of 1870-1913) discussed in the previous essay on Arthur Lewis’s classic Growth and Fluctuations, 1870-1913.

Sōseki has been, like his spokesmen in the citation above, swept up into a change-storm which led to a globalization backlash from 1914-1945, the era of deglobalization. WWI is the beginning bookend of all this.

Notice that the micro world of feelings and moods in the novel are resonant with the macro world though people at a certain time, such as the Sōseki protagonists, are not rigorous or prophetic theoreticians but rather groping in the dark.

World-Watching: Chinese Tech Groups Shaping UN Facial Recognition and Surveillance Standards

(from the Financial Times)

Chinese technology companies are shaping new facial recognition and surveillance standards at the UN, according to leaked documents obtained by the Financial Times, as they try to open up new markets in the developing world for their cutting-edge technologies.

Companies such as ZTE, Dahua and China Telecom are among those proposing new international standards — specifications aimed at creating universally consistent technology — in the UN’s International Telecommunication Union.

Read the full article [archived PDF]