Research Roundup | Nov. 14 | Nebraska Today

Welcome to the Research Roundup: a collection of highlights from the latest Husker research and practice.

Pick up good vibrations

In the United States, nearly a fifth of piglets that are reared die within three weeks of birth – that’s when a piglet is weaned from its mother before weaning. . Farmers and researchers are investigating how to better monitor sows and their litters to reduce mortality rates. Even better, watching video in the right lighting, along with digital editing and storage capabilities, would be difficult to achieve in a public space. Wearable sensors, however, struggle with durability, battery life and other issues.

Nebraska’s Tami Brown-Brandl, Raj Sharma and Asya Macon, all from the Department of Biological Systems Engineering, joined colleagues at the University of Michigan, Stanford University and Carnegie University. Mellon to find another option. The team placed sensors on the underside of some pens to test whether the vibrations could help determine the pig’s position – lying down vs.

With the help of machine learning, the vibration-sensitive system correctly classified the position of the pig in most cases: 95.5% of sitting / kneeling, 99.9% of lying and 100 % of standing. It correctly calculates pig feed 96% of the time and pig feed 91.3% of the time.

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The findings show that shock sensors can provide a reliable and effective way of identifying the causes – pig size and diseases, injuries caused by the sow – e.g. put the pigs in trouble.

Blood will flow

Peripheral artery disease is caused by plaque-related blockage of blood vessels, which restricts blood flow to the extremities, usually the legs. While the lack of oxygen can lead to chronic pain in the legs, peripheral artery disease can develop without pain, delaying treatment and can have long-term health problems. . And diagnosing peripheral artery disease can be especially difficult among the elderly, who sometimes have other health problems with symptoms such as PAD.

Unfortunately, the diagnostic procedure no PAD it is expensive and requires special training. Fadi Alsaleem of Nebraska Engineering, Mohammad Ali Takallou and Ali Hazem Al Ramini contributed to a new study on the development of a simple screening technique. Led by the University of Nebraska at Omaha, the study used machine learning to collect data from 270 adults – 227 with PAD43 without – the one who walked on the path marked with high-strength boards with the placement of memorial signs captured by high-quality photographs.

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By identifying some biomechanical and stress-related signatures, two types of machine learning models are well-differentiated between adults with and without. PAD in about 89% of cases. Although only relying on the so-called ground forces – the forces produced on the foot when the foot applies force to the ground – some of the models have to 87% accuracy.

Applying the study’s validation concept to wearable sensors, including those integrated into shoes, can help clinicians in the early stages of PADsaid the company.

Research says…

In late 2020, the university’s Bureau of Sociological Research surveyed a sample of 2,775 Nebraskans. The research came between the tremors of two seismic events: the beginning of the COVID-19 pandemic and nationwide protests over the killing of George Floyd by a former Minneapolis police officer.

As a researcher who studies the intersections between public health, crime, policing and politics, Lisa Kort-Butler of the Department of Sociology decided to examine those research results. He was particularly interested in the bigotry and anxiety that fueled the ongoing conflict of opinion about public policy and power.

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Finding out COVID-19 as a serious threat, regardless of whether that threat is considered an economic or health problem, is associated with renewed concern about crime. And Nebraskans who watched COVID-19 as a health threat is more likely to avoid areas they consider unsafe. But those who know one thing are in agreement COVID-19 is not immune to those areas – an unknown fact that still challenges government research.

About 20% of respondents said their community has very little law enforcement. According to the survey, Nebraskans are the most likely to believe:

  • Seen COVID-19 is more of a threat to the economy than public health
  • Shows trust in political leaders, but distrust of health officials, in matters of concern COVID-19
  • It is believed that race relations are worse in the United States

Overall, Kort-Butler said, the data support the idea that hopelessness and insecurity from periods of upheaval can lead to support for criminal justice policies that promise to return to normalcy. normalcy.

Source

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