Tag Archives: system thinking

emergy

There are still people working on emergy (embodied energy) as an accounting and system simulation system. This group is in Brazil.

Contribution of the Paraconsistent Tri-Annotated Logic to emergy accounting and decision making

The process of decision-making is a complex task that can become more challenging if the information provided by indicators is contradictory. Emergy accounting is an environmental accounting methodology that has been used to guide environmental decision making. In this paper we propose a comprehensive tool to support decision-making in emergy accounting. Paraconsistent Logic is a non-classic logic, which can aid in decision-making when the investigator is confronted with contradictory results. Paraconsistent Tri-Annotated Logic (PL3v) is proposed as a decision tool to compare different systems and allow selection of those alternatives with the best performance from the standpoint of sustainability defined in emergy terms. The rationale behind our selection of a set of emergy indicators to assess sustainability included such factors as increased efficiency, setting a priority for local resource use and minimization of the use of non-renewable resources. Two actual examples from the literature that resulted in contradictory evidence of system sustainability were compared within the framework of PL3v. Emergy indicators that correspond to positive evidence of sustainability (i.e., those that show increased efficiency and greater local resource use) were assigned as two favorable logic measures of sustainability. The PL3v analysis is completed with the identification of evidence that is unfavorable to sustainability, which is given by a third indicator negatively correlated with sustainability (i.e., non-renewable resource use). Operationally, the methodology proposed the normalization of the indicator values between [0,1] to fit to the PL3v annotation framework. Comparison of the systems examined is presented through the Paraconsistent Logic approach with the aid of a graphical representation and the calculation of the degree of certainty related to the truthfulness of the sustainability proposition.

do kids do better in private school than public?

The answer, at least in this study, is a clear no. Kids in private school are doing better than kids in public school, but it can be entirely explained by family income.

Does Attendance in Private Schools Predict Student Outcomes at Age 15? Evidence From a Longitudinal Study

By tracking longitudinally a sample of American children (n = 1,097), this study examined the extent to which enrollment in private schools between kindergarten and ninth grade was related to students’ academic, social, psychological, and attainment outcomes at age 15. Results from this investigation revealed that in unadjusted models, children with a history of enrollment in private schools performed better on nearly all outcomes assessed in adolescence. However, by simply controlling for the sociodemographic characteristics that selected children and families into these schools, all of the advantages of private school education were eliminated. There was also no evidence to suggest that low-income children or children enrolled in urban schools benefited more from private school enrollment.

“pro-growth education for Japan”

I was ready to rail against this article about “pro-growth education“, thinking from the title that it would be all about STEM and teaching job skills rather than thinking skills. But it turned out to be more about thinking skills, and went over some research on early childhood education with an emphasis to music, even giving a shout out to the Suzuki and Kodaly methods of teaching music to young children.

April 2018 in Review

Most frightening stories:

Most hopeful stories:

Most interesting stories, that were not particularly frightening or hopeful, or perhaps were a mixture of both:

green roofs

Green roofs continue to catch on very, very slowly in the U.S. They are pretty common in Europe. Toronto has a fairly aggressive ordinance requiring them on most new non-residential buildings. Meanwhile, in the U.S. we have scattered demonstration projects and a few tax incentives. San Francisco has just become the first U.S. city to take steps toward requiring them in private development.

We have a strange relationship with technology in this country. We have embraced information technology, but in more traditional fields like civil engineering, architecture and construction our professionals seem to lack information, imagination, and intellectual curiosity about what is going on elsewhere in the world. The thinking typically goes that a new technology is not cost-effective because it is not common, and it is not common because it is not cost-effective. Short-term market forces don’t drive development of the technology in this situation, especially for long-lived technologies like buildings, highways, or pipes. Government can estimate the potential long-term benefits of adopting new technologies, then fund research, development, and lower barriers to new business creation by, to give just one example, freeing entrepreneurs from the burden of having health care tied to a full time corporate job. But our politicians seem incapable of understanding these slightly complex issues, and our citizenry is not demanding that they do.

tipping points and ecosystem collapse

This research presents seagrass meadows as an example of an ecosystem that seems to disappear suddenly, but actually reached a tipping point caused by chronic pollution.

Testing for thresholds of ecosystem collapse in seagrass meadows?

Ecological systems can be dynamic and unpredictable, with shifts from one ecosystem state to another often considered ‘surprising’. This unpredictability is often thought to be due to ecological thresholds, where small cumulative increases in an environmental stressor drives a much greater consequence than would be predicted from linear effects, suggesting an unforeseen tipping point is crossed. In coastal waters, broad-scale seagrass loss often occurs as a sudden event which is associated with human-driven nutrient enrichment (eutrophication). We tested whether the response of seagrass ecosystems to coastal nutrient enrichment represents a threshold effect. Seagrass response did follow a threshold pattern when nutrient enrichment (dissolved inorganic nitrogen) exceeded moderate levels, with a switch from positive to negative net leaf production. Epiphyte load also increased with nutrient enrichment, potentially driving this shift. Inadvertently crossing such thresholds, as can occur through ineffective management of land-derived inputs such as wastewater and stormwater on urbanised coasts, may help account for the widely observed ‘sudden’ loss of seagrass meadows. By identifying tipping points we may not only improve monitoring for adaptive management that seeks to avoid threshold effects, but also the restoration of systems that have crossed them.

more on Irving Fisher’s hydraulic machine

I’ve talked before about Irving Fisher’s hydraulic model of the economy. Here is a 2005 article that appears to discuss all its pieces and parts in detail.

How to Compute Equilibrium Prices in 1891

William C. Brainard and Herbert E. Scarf
The American Journal of Economics and Sociology
Vol. 64, No. 1, Special Invited Issue: Celebrating Irving Fisher: The Legacy of a Great Economist (Jan., 2005), pp. 57-83
Stable URL: http://www.jstor.org/stable/3488117
Page Count: 27

 

all opinions are now equal

David Remnick from the New Yorker interviewed Obama before, during, and after the election. I don’t want to write a lot of words rehashing the election for a couple reasons. First, everyone else is doing that. Second, I suspect we need to put some time and distance between us and the election before we can decide which combination of the many theories is correct (for example, Trump was a genius at connecting with the middle class, white Americans are a bunch of ignorant, paranoid racist assholes, Hillary was a uniquely weak candidate, Russia and/or the FBI stole the election, a majority of Americans actually preferred Hillary, Biden or Sanders would have won easily, it was essentially a tie and the electoral college is just quirky and outdated, etc.)

Obama offered a theory though that rang at least partly true to me, and I actually find it disturbing.

“Until recently, religious institutions, academia, and media set out the parameters of acceptable discourse, and it ranged from the unthinkable to the radical to the acceptable to policy,” Simas said. “The continuum has changed. Had Donald Trump said the things he said during the campaign eight years ago—about banning Muslims, about Mexicans, about the disabled, about women—his Republican opponents, faith leaders, academia would have denounced him and there would be no way around those voices. Now, through Facebook and Twitter, you can get around them. There is social permission for this kind of discourse. Plus, through the same social media, you can find people who agree with you, who validate these thoughts and opinions. This creates a whole new permission structure, a sense of social affirmation for what was once thought unthinkable. This is a foundational change…”

The new media ecosystem “means everything is true and nothing is true,” Obama told me later. “An explanation of climate change from a Nobel Prize-winning physicist looks exactly the same on your Facebook page as the denial of climate change by somebody on the Koch brothers’ payroll. And the capacity to disseminate misinformation, wild conspiracy theories, to paint the opposition in wildly negative light without any rebuttal—that has accelerated in ways that much more sharply polarize the electorate and make it very difficult to have a common conversation.”

That marked a decisive change from previous political eras, he maintained. “Ideally, in a democracy, everybody would agree that climate change is the consequence of man-made behavior, because that’s what ninety-nine per cent of scientists tell us,” he said. “And then we would have a debate about how to fix it. That’s how, in the seventies, eighties, and nineties, you had Republicans supporting the Clean Air Act and you had a market-based fix for acid rain rather than a command-and-control approach. So you’d argue about means, but there was a baseline of facts that we could all work off of. And now we just don’t have that.”

It’s disturbing to me because I really had the sense during the election that facts didn’t matter at all. I don’t think human nature is particularly good at analyzing and understanding the nature of complex problems, and our education system is not particularly good at helping us to overcome our innate tendency to oversimplify and misdiagnose these problems. But at least detecting and agreeing on the facts needs to be the common launching point for reasoned debate. If we are no longer even attempting to establish the facts, we can’t even get to that starting point for problem solving and we have actually taken a step back as a civilization.

I don’t want to blame the millennial generation for everything, but I do think the educational culture that generation grew up in and the new media culture are intertwined. I think this generation was encouraged to formulate and express opinions much more than I was at the tail end of generation X. This is not bad in itself. Young people need to be trained to establish the facts, understand the larger systems those facts are embedded in, define the problem, propose and discuss solutions. But that doesn’t mean all conclusions, opinions, and proposed solutions should be given equal weight. When young people express opinions, they need to get supportive but firm feedback from people with more experience and seasoned judgment, because that is how they gain their own experience, judgment and problem solving ability.

Now of course I want to offer some prescription for fixing this. Well, I am not feeling too optimistic at the moment. If we were rowing against the current before, now we seem to have turned the canoe around and we are enthusiastically rowing with the current toward the whirlpool. Like I said, I need some time and distance to think more objectively.