Saturday, July 30, 2022

Listening to the people results in a more sustainable future energy system

Energy plan for 2050 based on consumer preferences and future demographics of the US population includes 50% more electricity derived from renewable sources than current projections

Peer-Reviewed Publication

KYUSHU UNIVERSITY

Preference-based energy mix 

IMAGE: THIS GRAPHIC SHOWS THE FRACTION OF DIFFERENT TYPES OF ELECTRICITY SOURCES IN THE US IN 2050 BASED ON AN ENERGY MIX PLAN THAT TAKES INTO ACCOUNT THE PREFERENCES AND DEMOGRAPHICS OF VARIOUS RACIAL GROUPS, WITH PROJECTIONS BY THE US ENERGY INFORMATION ADMINISTRATION BASED ON CURRENT PLANS AND POLICIES FOR COMPARISON (VALUES IN GRAY). DEVELOPED BY A RESEARCH TEAM LED BY KYUSHU UNIVERSITY BASED ON A 2020 SURVEY OF 3,000 PEOPLE IN THE US, THE PREFERENCE-BASED PLAN INCLUDES 50% MORE ENERGY FROM RENEWABLE SOURCES THAN CURRENT PROJECTIONS. ALLOWING SUCH BOTTOM-UP APPROACHES THAT CONSIDER THE PREFERENCES OF THE POPULATION TO INFLUENCE POLICYMAKING COULD HELP TO REALIZE EMISSION AND CLIMATE GOALS IN THE FUTURE. view more 

CREDIT: KYUSHU UNIVERSITY

As policymakers around the world aim to cut carbon emissions and meet climate goals, new research points to a critical group whose opinions could help to shape energy planning for the better: the consumers.

By taking into account the demographics and preferences of US racial groups, clarified through a nationally representative survey of 3,000 US residents, researchers led by Kyushu University created a ‘desirable’ electricity generation mix for 2050 that includes 50% more energy from renewable sources than projections based on current plans and policies.

“In the US, consumers are being given more and more ways to choose their energy provider, so listening to and understanding these voices is crucial,” says Andrew Chapman, associate professor at Kyushu University’s International Institute for Carbon-Neutral Research (I2CNER) and leader of the study.

“In light of this, we set out to develop an energy plan that incorporates the broad range of voices and the rapidly shifting demographics of the US and then compared it with the current top-down plan in which energy goals are set by policymakers.”

To develop their energy plan, the international team of researchers from Kyushu University, Nagasaki University, and the University of Illinois at Urbana-Champaign surveyed 3,000 people in the US in 2020 on their preferences, awareness, priorities, and other opinions regarding energy technologies, policies, and issues.

Considering only future construction projects needed to replace power plants at the end of their life and to meet predicted growth in energy consumption, they allocated roughly 2.4 billion kWh of electricity generating capacity out to the year 2050 based on the preferences of each racial group and the predicted future racial demographics of the country.

The resultant energy mix includes nearly 61% renewable-based electricity compared to 42% envisaged under the projected 2050 energy mix according to the US Energy Information Administration based on current plans and policies.

On the other hand, nuclear power is reduced by over half and coal-based generation by over three quarters in the researchers’ plan compared to the projections. Natural gas is similar in both cases, indicating that consumers are aware of the practical need for a stable energy supply.

“There appears to be strong support for a further emphasis on technologies that will help to achieve emission and climate goals when planning the future energy system, as indicated by a strong desire to move away from fossil and nuclear toward renewables,” notes Chapman.

“Though each racial group prefers different sources in the future energy mix, all groups recognize the need for a stable energy supply, combining natural gas with their preference for renewables, led by solar and wind.”

Differences in regional preferences also emerged. For example, along the west coast, there was significantly higher importance placed on dealing with climate change and realizing an equitable energy system. In the future, such input could be used to shape energy plans that leverage divisions among power grids across the US.

The researchers note that their plan’s allotment of hydroelectric and geothermal generation could be unrealistic because of how long such projects take to plan and implement. Furthermore, respondents consistently indicated a healthy economy as one of their priorities, so balancing costs and employment opportunities must also be considered in energy system design.

“In addition to consumer preferences seeming to support more renewables than current plans, we also found that preferences were linked to awareness, which is likewise strongly linked to education,” comments Chapman. “Thus, energy education is likely to be another important aspect for achieving carbon reduction goals and encouraging participatory energy system design.”

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For more information about this research, see “Cultural and demographic energy system awareness and preference: Implications for future energy system design in the United States,” Andrew Chapman, Yosuke Shigetomi, Shamal Chandra Karmaker, Bidyut Saha, and Caleb Brooks, Energy Economics (2022). https://doi.org/10.1016/j.eneco.2022.106141

About Kyushu University

Kyushu University is one of Japan’s leading research-oriented institutes of higher education since its founding in 1911. Home to around 19,000 students and 8,000 faculty and staff, Kyushu U's world-class research centers cover a wide range of study areas and research fields, from the humanities and arts to engineering and medical sciences. Its multiple campuses—including the largest in Japan—are located around Fukuoka City, a coastal metropolis on the southwestern Japanese island of Kyushu that is frequently ranked among the world’s most livable cities and historically known as a gateway to Asia. The International Institute for Carbon-Neutral Energy Research (I2CNER) within Kyushu University is focused on developing carbon-reducing energy technologies and energy analysis of the future ‘carbon neutral’ energy system.

Pinpointing consciousness in animal brain using mouse ‘brain map’


New study identifies network cores of the brain with strong bidirectional connections

Peer-Reviewed Publication

UNIVERSITY OF TOKYO

Importance of bidirectionality for consciousness 

IMAGE: IT HAS BEEN SUGGESTED THAT THE PART OF THE BRAIN NETWORK SUPPORTING CONSCIOUSNESS BRAIN REGIONS SHOULD BE BIDIRECTIONALLY CONNECTED BECAUSE BOTH FEED-FORWARD AND FEEDBACK PROCESSES ARE NECESSARY FOR CONSCIOUS EXPERIENCE. FOR EXAMPLE, PREVIOUS STUDIES EXAMINING VISUAL PERCEPTION HAVE SHOWN THAT CONSCIOUS PERCEPTION DOES NOT ARISE WHEN THERE IS ONLY FEED-FORWARD PROCESSING, WHEREAS IT ARISES WHEN THERE IS FEEDBACK AS WELL AS FEED-FORWARD PROCESSING. view more 

CREDIT: ©2022 JUN KITAZONO

Science may be one step closer to understanding where consciousness resides in the brain. A new study shows the importance of certain types of neural connections in identifying consciousness.

The research, published in Cerebral Cortex, was led by Jun Kitazono, a corresponding author and a project researcher in the  Department of General Systems Studies at the University of Tokyo.

“Where in the brain consciousness resides has been one of the biggest questions in science,” said Associate Professor Masafumi Oizumi, corresponding author and head of the lab conducting the study. “Although we have not reached a conclusive answer, much empirical evidence has been accumulated in the course of searching for the minimal mechanisms sufficient for conscious experience, or the neural correlates of consciousness.”

For this study, the team took a step toward identifying the minimally sufficient subnetworks in the brain that support conscious experience.

To identify the areas of the brain where consciousness resides, the researchers looked for one specific hallmark of consciousness within the neural networks of the brain: bidirectional pathways. When we see something or experience a sensation, our brains take in information. This is called a feed-forward signal, but receiving such feed-forward signals is not enough for consciousness. Our brains also need to send information back, in what is called feedback. Not every part of the brain can both receive feed-forward and return feedback information. Researchers hypothesized that these bidirectional connections are an essential hallmark of the parts of the brain responsible for consciousness.

“Feed-forward processing alone is insufficient for subjects to consciously perceive stimuli; rather, feedback is also necessary, indicating the need for bidirectional processing. The feedback component disappears not only during the loss of specific contents of consciousness in awake states, but also during unconscious states where conscious experiences are generally lost, such as general anesthesia, sleep and vegetative states,” said Kitazono. He also explained that it does not matter if you are looking at a human, monkey, mouse, bird or fly; the bidirectionality of processing remains essential.

CAPTION

The proposed algorithm can decompose the entire network hierarchically, into the network part with the strongest bidirectional connections, the part with the second strongest, and so on down the line.

CREDIT

©2022 Jun Kitazono

Researchers used a mouse connectome and computational techniques to test their idea. A connectome is a detailed map of the connections in the brain. First, they developed an efficient algorithm to extract the parts of the brain with strong bidirectional connections, called complexes. Then, they applied the algorithm to the mouse connectome.

“We found that the extracted complexes with the most bidirectionality were not evenly distributed among all major regions, but rather are concentrated in the cortical regions and thalamic regions,” said Kitazono. “On the other hand, regions in the other major regions have low bidirectionality. In particular, regions in the cerebellum have much lower bidirectionality.”

These findings align with where scientists have long thought consciousness resides in the brain. The cerebral cortex, located on the surface of the brain, contains sensory areas, motor areas and association areas that are thought to be essential to consciousness experience. The thalamus, located in the middle of the brain, has likewise been thought to be related to consciousness, and in particular, the interaction between the thalamus and cortical regions, called the thalamo-cortical loop, is considered important for consciousness. These results support the idea that the bidirectionality in the brain network is a key to identifying the place of consciousness.

Researchers emphasized that they are still working toward identifying the place of consciousness.

“This study focuses only on ‘static’ anatomical connections between neurons or brain areas. However, consciousness is ‘dynamic,’ changing from moment to moment depending on neural activity,” said Oizumi. “Although anatomical connections tell us how neural activity would propagate and how brain areas would interact, we need to directly investigate the dynamics of neural activity to identify the place of consciousness at any given moment.”

As a next step, he said the team is currently analyzing activity-based networks of the brain in various types of neural recordings.

“The ultimate goal of our lab is to find the mathematical relationship between consciousness and the brain,” said Oizumi. “In this study, we have attempted to relate the network properties of the brain to the place of consciousness. We will further investigate the relationship between consciousness and the brain, toward what is our ultimate goal.”

CAPTION

Conventional neuroscience has studied the relationship of what kind of brain activity r occurs in response to an external stimulus s (e.g., an image of an apple). If we write this relationship using the function f as r=f(s), we can say that clarifying the function f is the main research that conventional neuroscience has been doing. Such research has revealed much about the mechanism of information processing, that is, how the brain processes information from external stimuli. On the other hand, our brain not only processes information from the external world, but also produces the subjective experience of “seeing an apple.” The ultimate goal of the Oizumi Lab is to theoretically understand the subjective experience and consciousness produced by the brain: that is, to clarify the function g that connects brain activity r and consciousness C, where C is the consciousness produced from brain activity r (C=g(r)).

CREDIT

©2022 Masafumi Oizumi

Journal article

Jun Kitazono, Yuma Aoki, Masafumi Oizumi, “Bidirectionally connected cores in a mouse connectome: towards extracting the brain subnetworks essential for consciousness,” Cerebral Cortex: July 21, 2022, DOI: 10.1093/cercor/bhac143

Link: https://doi.org/10.1093/cercor/bhac143

 

Funding

Japan Science and Technology Agency ACT-X (Grant Number JPMJAX20A6), Japan Science and Technology Agency CREST (Grant Numbers JPMJCR1864 and JPMJCR15E2), AIP challenge program, Japan Science and Technology Agency Moonshot R&D (Grant Number JPMJMS2012), and Japan Society for the Promotion of Science KAKENHI (Grant Numbers 18H02713 and 20H05712) supported this research.

 

Related links

Oizumi Lab: https://sites.google.com/a/g.ecc.u-tokyo.ac.jp/oizumi-lab/english

Graduate School of Arts and Sciences: https://www.c.u-tokyo.ac.jp/eng_site/

 

About the University of Tokyo

The University of Tokyo is Japan's leading university and one of the world's top research universities. The vast research output of some 6,000 researchers is published in the world's top journals across the arts and sciences. Our vibrant student body of around 15,000 undergraduate and 15,000 graduate students includes over 4,000 international students. Find out more at www.u-tokyo.ac.jp/en/ or follow us on Twitter at @UTokyo_News_en.

Friday, July 29, 2022

Researchers develop new breath-driven concept set to transform access to hand prosthetics

Peer-Reviewed Publication

UNIVERSITY OF OXFORD

Testing during the development process 

IMAGE: TESTING DURING THE DEVELOPMENT PROCESS – GATHERING FEEDBACK FROM USERS. view more 

CREDIT: CREDIT: MOBILITY INDIA

The new air-powered hand provides a lightweight, low-maintenance and easy-to-use body-powered prosthetic option particularly well suited for children and those in low and middle-income countries.

 

A revolutionary new hand prosthesis powered and controlled by the user’s breathing has been developed by researchers at the University of Oxford. 

The simple lightweight device offers an alternative to Bowden cable-driven body-powered prosthetics initially developed in the early 19th century – particularly for those too young or anatomically unsuited to an uncomfortable harness and cable system.

Senior author Professor Jeroen Bergmann, Department of Engineering Science, University of Oxford said: ‘Our breathing-powered device provides a novel prosthetic option that can be used without limiting any of the user’s body movements. It is one of the first truly new design approaches for power and control of a body-powered prosthetic since the emergence of the cable-driven system over two centuries ago.’

Although several different prosthetic options exist (suitability dependent on the level of upper limb difference amongst other factors) little progress has been made in developing new approaches to power and control of body-powered devices compared to sophisticated externally powered prosthetics.

The most widely used functional upper-limb prosthesis remains the cable-driven body-powered system – which can be prohibitively expensive to own and maintain in low-resource settings because of the costs associated with the necessary professional fitting and maintenance.

The new approach, published in the journal Prosthesis, provides an alternative body-powered device for users in situations where cost, maintenance, comfort and ease of use are primary considerations.   

By regulating their breathing, users power a small purpose-built Tesla turbine that can accurately control the prosthetic finger movements. The volume of air needed to power the unit can be achieved by young children and the gearing in the unit determines the speed of the grasping action. 

Cable and harness free, the device is lightweight and suitable for children and adolescents who are still growing. Minimal maintenance and training are needed for ease of use in comparison to other prosthetic options.  

The researchers have been working with LimbBo, a leading UK-based charity for children with limb differences, to develop and refine the device.

Jane Hewitt, Trustee of LimbBo, said: ‘One of our aims at The LimbBo Foundation is to ensure that all our children have access to any devices which will aid their day-to-day lives. No two limb differences are the same and what will help one child will not be suitable for another. Currently, there is some choice available regarding prosthetics but there are still children who need a completely different approach. For many, their lack of an elbow joint severely limits their access to prosthetic devices and so we welcomed the chance to be involved with Professor Jeroen Bergmann to look at different approaches. This is an exciting development for many of our children.’

She added: ‘We welcome this research as a completely different approach to enabling our children to have the help that a prosthetic such as this would give them. The element of choice is important, and we would fully support any research and development plans that enable this. We feel that by including us in discussions the team in Oxford really do want the best for our children.’

A spokesperson from Mobility India, an NGO based in Bengaluru, India working with the researchers on user testing said: ‘The breathing-powered prosthetic (Airbender) has the potential to broaden prosthetic options for children and adolescents, especially in India and other developing countries that lack appropriate technology.’

First author Dr Vikranth H. Nagaraja, Department of Engineering Science, University of Oxford said: ‘Over 40 million individuals worldwide are estimated to have limb differences – most with no access to any form of prosthetic care. Besides, upper-limb prosthetics currently available to patients are often neither affordable nor appropriate, especially in low-resource settings. We hope our research represents a step-change in making prosthetics more widely accessible and helping overcome challenges with current options.’

The full paper, ‘Reimagining prosthetic control: A novel body-powered prosthetic system for simultaneous control and actuation,’ is available in the journal Prosthesis.

ENDS


Testing during the development process – gathering feedback from users.

CREDIT

Credit: Mobility India



Testing during the development process – gathering feedback from users.

CREDIT

Credit: Mobility India


CAPTION

New breath-driven hand prosthetic holding a pen

CREDIT

Credit: University of Oxford

BU researchers find interplay of ancestry and sexual dimorphism significantly affect growth patterns in frontal sinuses

Sinus shape is like fingerprint used by forensic anthropologists in identifying human remains.

Peer-Reviewed Publication

BOSTON UNIVERSITY SCHOOL OF MEDICINE

(Boston) – Located between and above your eyebrows, the frontal sinuses develop in shapes that are as unique to each person as a fingerprint. Since 1925, they’ve been used by forensic anthropologists to help identify human remains when dental or other medical records were missing.

Boston University School of Medicine (BUSM) researchers have found the development of the frontal sinus was affected more by sexual dimorphism than the ancestry of the individual and that it was the interplay between those two factors that produced the most significant variation.

“It is a common drive of people to be curious about ourselves, our backgrounds and our bodies. This study takes a fascinating structure that is as unique to an individual as their fingerprint and starts to shed light on what causes this feature to be so special to each person,” said corresponding author Sean Tallman, PhD, assistant professor of anatomy & neurobiology. Former graduate student Austin Shamlou, MS, now a research technician at Massachusetts General Hospital, is a co-author in the study.

The researchers analyzed computed tomography (CT) images of more than 300 individuals designated as assigned male or assigned female at birth. Individuals also were classified by ancestral backgrounds of African-derived, Asian-derived, European-derived, or Latin American-derived. The authors used Photoshop to create an outline of the frontal sinus layer-by-layer and took measurements of maximum height, width and depth. These frontal sinus outlines were categorized into three groups and compared against variables. The study concluded that when considered separately neither assigned sex nor ancestry significantly affected sinus shape, but there was significant variation in maximum height and maximum depth when the two factors were looked at together.

“Interestingly, the interactive effects of sexual dimorphism and adaptive population histories influence the dimensions of the frontal sinus,” said Tallman, who added that a clear pattern had not yet been found.

Tallman said further research was needed to address the question of why the frontal sinus forms unique structures for every individual. He cautioned that in the U.S. sinus variation did not fall along ancestral lines, suggesting that there was significant overlap in ancestral climates or that climate adaptations no longer impacted variation in the U.S.

These findings appear online in the journal Biology.

US Adults’ Beliefs About Harassing or Threatening Public Health Officials During the COVID-19 Pandemic

Key Points

Question  What factors shape US adults’ beliefs regarding whether threatening or harassing public health officials was justified during the COVID-19 pandemic?

Findings  In this survey study of 1086 US adults, the share who believed that harassing or threatening public health officials because of business closures was justified rose from 20% to 25% and 15% to 21%, respectively, from November 2020 to July and August 2021. There were increases in negative views over time among higher earners, political independents, those with more education, and those most trusting of science.

Meaning  These findings suggest that restoring trust in public health officials will require strategies tailored to engage diverse viewpoints.

Abstract

Importance  The rise in attacks on public health officials has weakened the public health workforce and complicated COVID-19 mitigation efforts.

Objective  To examine the share of US adults who believed harassing or threatening public health officials because of COVID-19 business closures was justified and the factors shaping those beliefs.

Design, Setting, and Participants  The Johns Hopkins University COVID-19 Civic Life and Public Health Survey was fielded from November 11 to 30, 2020, and July 26 to August 29, 2021. A nationally representative cohort of 1086 US adults was included.

Main Outcomes and Measures  Respondents were asked how much they believed that threatening or harassing public health officials for business closures to slow COVID-19 transmission was justified. Adjusted differences in beliefs regarding attacks on public health officials were examined by respondent sociodemographic and political characteristics and by trust in science.

Results  Of 1086 respondents who completed both survey waves, 565 (52%) were women, and the mean (SE) age was 49 (0.77) years. Overall, 177 respondents (16%) were Hispanic, 125 (11%) were non-Hispanic Black, 695 (64%) were non-Hispanic White, and 90 (8%) were non-Hispanic and another race. From November 2020 to July and August 2021, the share of adults who believed harassing or threatening public health officials because of business closures was justified rose from 20% (n = 218) to 25% (n = 276) (P = .046) and 15% (n = 163) to 21% (n = 232) (P = .01), respectively. In multivariable regression analysis, respondents who trusted science not much or not at all were more likely to view threatening public health officials as justified compared with who trusted science a lot (November 2020: 35% [95% CI, 21%-49%] vs 7% [95% CI, 4%-9%]; P < .001; July and August 2021: 47% [95% CI, 33%-61%] vs 15% [95% CI, 11%-19%]; P < .001). There were increases in negative views toward public health officials between November 2020 and July and August 2021, among those earning $75 000 or more annually (threatening justified: 7 [95% CI, 1-14] percentage points; P = .03), those with some college education (threatening justified: 6 [95% CI, 2-11] percentage points; P = .003), those identifying as politically independent (harassing justified: 9 [95% CI, 3-14] percentage points; P = .01), and those trusting science a lot (threatening justified: 8 [95% CI, 4-13] percentage points; P < .001).

Conclusions and Relevance  While antagonism toward public health officials was concentrated among those doubting science and groups most negatively affected by the pandemic (eg, those with lower income and less education), the findings of this study suggest that there has been a shift toward such beliefs within more economically advantaged subgroups and those more trusting of science. Restoring public trust in public health officials will require nuanced engagement with diverse groups.

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US Adults’ Beliefs About Harassing or Threatening Public Health Officials During the COVID-19 Pandemic | Violence | JAMA Network Open | JAMA Network