Sam Cantu

Engineer, Health & Safety Professional, Problem Solver, Fightin’ Texas Aggie

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Human Worker Reliability

Charles P. Shelton (1999) stated, “In any complex system, most errors and failures in the system can be traced to a human source.” Human performance varies from person to person because it is a function of three factors; motivation, ability, and opportunity. Simply put, a person must desire, be able, and have access to do a task. Because of the variability in these and other personal factors, people are not consistent performers. Is it possible to improve the reliability of people in the workplace?

Human performance can drop when conducting tasks that require heavy concentration or are considered boring. Most people will perform better in a comfortable setting. Regulating the temperature, humidity, lighting, background noise, and environmental factors within comfort limits of the worker can increase productivity by reducing physical and psychological stress. A workplace that is...

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Animal Testing

Generally speaking I like to research the products that I buy. Many people do this with TVs and other electronics; ensuring that every feature important to them is available. I also do this with the food and drink that I buy. I try to avoid highly processed foods with ingredients that I can’t pronounce. Why is it that people will spend more time researching which TV to buy than the food they eat or the products they put on their bodies? Everyone has to eat. Over time more money will be spent on food than that TV, but it baffles me to just assume anything in a grocery store is safe for consumption or use?

Recently, I have been studying toxicology and learned quite a bit of new information regarding toxic agents; their affect on the body and testing methods. As a vegan, I have difficulty dealing with the use of animals for human research and testing. Whether it be rodent...

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Considering Solar Panels?

Residential solar panels were something that my wife and I had been interested in for years. However, we lived in an older home and knew a few things: our home wasn’t very energy efficient, a solar panel system would easily overvalue the home in our neighborhood, and it was not our forever home. Last Summer we moved to a new city and decided to purchase solar panels for the new house. It took a little longer than we would have hoped, but here is a walk-through of the process that we went through, some tips to consider, and things to avoid.

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My wife heard a radio advertisement about a solar company looking for participants into a market analysis. They offered a free “energy audit” for the opportunity to come and talk about their product; so she scheduled an appointment. If our home met certain geographic and energy requirements then we could qualify for their program which...

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