Wikipedia & Linterweb

14 octobre 2009

Understanding Defensive Driving

Filed under: okawix — Matthieu @ 12:05

Defensive driving is a critical skill set for anyone behind the wheel, but it is significant for truck drivers navigating our highways. These heavy-duty vehicles require heightened caution and expertise due to their large size, blind spots, and longer stopping distances. Given the potential impact of any mishap, truck drivers must master the art of defensive driving.

This article will delve into the unique challenges faced by those who operate these large vehicles and provide practical tips and strategies to minimize risks on the road. As safety should never be an afterthought, our focus will be on preventing accidents before they happen, ensuring that every trip is safe.

Driving doesn’t have to be a dangerous task; it can be a safe and controlled activity with the right knowledge and approach. Let’s explore the essential defensive driving practices for truck drivers. Get the best tips and advices at IMPROV.

 

Understanding Defensive Driving

Defensive driving is a method of driving that enables motorists to identify potential hazards before they become dangerous. By employing proactive strategies like anticipating other drivers’ actions, maintaining a safe distance, and adjusting to road and weather conditions, defensive drivers can effectively circumvent accidents before they occur. It’s a way to ensure your safety and the safety of others sharing the road.

Central to the concept of defensive driving is the principle of anticipation. A defensive driver constantly observes their surroundings, anticipates possible scenarios, and prepares for unexpected events. This is achieved by constantly scanning the road, paying attention to the behaviors of other drivers, pedestrians, and cyclists, and adjusting your driving accordingly.

Being aware of your surroundings is another cornerstone of defensive driving. It involves constant vigilance of your immediate environment — inside and outside the vehicle. It’s about being alert to the ever-changing conditions, such as the weather, road works, or traffic congestion, and adjusting your driving speed and style to match these conditions. In essence, defensive driving is about taking a proactive and prepared approach to driving, which is especially crucial for truck drivers due to their vehicles’ size and potential impact.

 

Special Challenges for Truck Drivers

The art of defensive driving takes on a whole new perspective when operating commercial trucks. Due to these vehicles’ sheer size and design, truck drivers face unique challenges that demand heightened awareness and a specialized skill set. This section examines a few of these challenges, primarily focusing on size and weight, blind spots, stopping distances, and maneuverability.

The Size and Weight Conundrum

Commercial trucks stand out significantly in terms of their size and weight. Their massive structure and substantial load make navigating through traffic strenuous. The sheer weight of a fully loaded truck can range from 20,000 to 80,000 pounds, significantly impacting the vehicle’s acceleration, braking, and maneuverability. Truck drivers must always be conscious of these factors, making necessary adjustments in their driving style to accommodate the vehicle’s size and weight.

The Blind Spot Challenge

Blind spots in commercial trucks are considerably larger than those in smaller vehicles. The areas directly behind and beside the truck, particularly on the right side, are often invisible to the driver, even with mirrors. This increases the risk of collision with other road users who may be ‘hiding’ in these blind spots. As such, checking blind spots vigilantly and frequently is a non-negotiable aspect of defensive driving for truck drivers.

Stopping Distance and Maneuverability

Stopping a commercial truck is not as straightforward as stopping a passenger vehicle. Due to their considerable weight, trucks require a much longer distance to come to a complete halt.

Drivers must, therefore, maintain a safe following distance, considering the extra stopping time needed. Furthermore, the maneuverability of a truck is a complex undertaking due to its size and length. Performing turns and navigating tight spaces requires exceptional skill and experience, making these maneuvers another significant aspect of defensive driving for truck drivers.

 

Benefits of Defensive Driving for Truck Drivers

Defensive driving significantly reduces the risk of hazards for truck drivers, presenting numerous benefits that extend beyond the immediate safety of the individual driver. Understanding these advantages can provide additional motivation to adopt defensive driving techniques and underscore their importance. Here, we explore the benefits of defensive driving for truck drivers.

Reduce the Likelihood of Accidents

Defensive driving is an effective strategy to prevent accidents, as it involves anticipating potential dangers and reacting promptly to mitigate them. By maintaining a safe following distance, checking blind spots frequently, and adapting to road conditions, truck drivers can greatly reduce the chances of accidents. Truck drivers who adopt defensive driving habits ensure their safety and contribute to safer roadways for all users.

Lower the Risk of Injuries to the Driver and Others on the Road

Defensive driving goes a long way in ensuring the safety of the truck driver and other road users. By staying alert, predicting potential hazards, and taking necessary precautions, truck drivers can prevent dangerous situations that may lead to injuries. It also reduces the risk of major traffic incidents involving multiple vehicles, thus safeguarding the well-being of other motorists, pedestrians, and cyclists sharing the road.

Positive Impact on Insurance Premiums and Overall Cost Savings

Engaging in defensive driving can lead to substantial cost savings for truck drivers. Many insurance companies offer discounts on premiums for drivers who follow defensive driving practices, as they are less likely to be involved in accidents. Additionally, by avoiding collisions, drivers can evade the costly repairs and legal issues that often accompany accidents. Defensive driving, therefore, proves to be economically beneficial in the long run.

 

Defensive Driving Techniques for Truck Drivers

Adopting effective defensive driving techniques is crucial for truck drivers to ensure their safety and that of other road users. These techniques enable drivers to anticipate potential hazards, react appropriately, and mitigate risks. Here, we delve into some fundamental defensive driving techniques that every truck driver should practice.

Maintaining a Safe Following Distance

A safe following distance is pivotal in preventing accidents, especially for commercial trucks requiring a longer stopping distance due to their weight. The rule of thumb for truck drivers is to leave at least one second for every 10 feet of vehicle length at speeds below 40 mph. To maintain speeds exceeding 40 mph, it is necessary to allocate an additional second. For instance, if driving a 40-foot vehicle, you should leave four seconds between you and the vehicle ahead.

Proper Use of Mirrors and Checking Blind Spots

Mirrors are essential tools for truck drivers to monitor their surroundings, especially to keep an eye on those notorious blind spots. Truck drivers should regularly check their mirrors every 5-10 seconds, alternating between the rearview and side mirrors. Furthermore, before changing lanes, turning, or performing any maneuver, drivers must always double-check their blind spots to ensure no vehicles are ‘hiding’ in those areas.

Strategies for Handling Adverse Weather Conditions

Driving a commercial truck in adverse weather conditions can be challenging, requiring drivers to adapt their driving style to ensure safety. These strategies can help truck drivers navigate safely in various weather conditions:

  1. Reduce speed: Lowering your speed allows more reaction time in case of sudden stops or turns.
  2. Increase following distance: In adverse weather conditions, stopping distances can be significantly increased. Hence, drivers should leave more space between their trucks and vehicles.
  3. Use headlights: Always keep your headlights on to enhance visibility, even in light rain or fog.
  4. Avoid sudden maneuvers: Any sudden move can lead to skidding or loss of control, so make sure to brake, steer, and accelerate smoothly.
  5. Stay updated with weather reports: Keep track of weather forecasts, plan your route, and schedule accordingly.

Understanding and Adhering to Traffic Laws and Regulations

Adherence to traffic laws and regulations is not just a legal obligation but integral to safe driving. Truck drivers need to familiarize themselves with the laws of the areas they’re navigating, including speed limits, weight restrictions, and specific rules related to commercial vehicles. Regularly updating one’s knowledge about these laws is key, as regulations may vary by state and change over time.

5 octobre 2009

The Science of Healthy Eating

Filed under: okawix — Matthieu @ 16:32

If you are feeling confused about what to eat, you are not alone. You have probably heard some fitness experts talk about good foods, bad foods, healthy foods, and clean foods. Some talk about food like it’s a drug. Others spend time trying to stay away from some of their favorite foods. And then there are the food police who shame you for, let’s say, eating dessert (Are you really going to eat that cookie?) as if one cookie will ruin your life forever. Read more about alpilean.

Every diet guru talks about what to eat. Instead, I will like to discuss why we eat the way we do and how we can change that. The purpose of this article is to share the science and strategy you need to get the results you want.

I. Nutrition: How to Eat Healthy and Stick to It

We will examine the science behind why we crave juck food and how food scientist create foods that leads to cravings

II. How to Make Healthy Eating Easier

We will look into the importance of the environment for healthy eating. How you can eat healthy without noticing. Then  we will discuss on some idea on what to eat, ways to eat healthy without feeling guilty.

III. How to Stick to a Healthy Eating Habit

We will address the root problem to your unhealthy eating habit. Teach you how to Say No to Temptation with a one word phrase that will help you eat healthy for the rest of your life.
 

I. The Science of Healthy Eating

The benefits of good nutrition are fairly obvious to most of us. You have more energy, your health improves, and your productivity blossoms. Healthy eating also plays a huge role in maintaining a healthy weight, which means a decreased risk of type 2 diabetes, certain cancers, heart problems, high blood pressure, and a host of other health ailments. (Genetics also plays a significant role.)

 

But if there are so many good reasons for healthy eating, why is it so difficult to actually do? To answer that question, we should start by learning why we crave junk food. 

 

 

Why We Crave Junk Food

 

Steven Witherly is a food scientist who has spent the last 20 years studying what makes certain foods more addictive than others. Much of the science that follows is from his excellent report, Why Humans Like Junk Food.

According to Witherly, when you eat tasty food, there are two factors that make the experience pleasurable.

First, there is the sensation of eating the food. This includes what it tastes like (salty, sweet, umami, etc.), what it smells like, and how it feels in your mouth. This last quality known as “orosensation” can be particularly important. Food companies will spend millions of dollars to discover the most satisfying level of crunch in a potato chip. Food scientists will test for the perfect amount of fizzle in a soda. These elements all combine to create the sensation that your brain associates with a particular food or drink. This is how phenq works.

The second factor is the actual macronutrient makeup of the food — the blend of proteins, fats, and carbohydrates that it contains. In the case of junk food, food manufacturers are looking for a perfect combination of salt, sugar, and fat that excites your brain and gets you coming back for more.

Here’s how they do it…

 

How Food Scientists Create Cravings

There is a range of factors that scientists and food manufacturers use to make food more addictive.

Dynamic contrast. Dynamic contrast refers to a combination of different sensations in the same food. In the words of Witherly, foods with dynamic contrast have “an edible shell that goes crunch followed by something soft or creamy and full of taste-active compounds. This rule applies to a variety of our favorite food structures; the caramelized top of a creme brulee, a slice of pizza, or an Oreo cookie, the brain finds crunching through something like this very novel and thrilling.”

Salivary response. Salivation is part of the experience of eating food, and the more a food causes you to salivate, the more it will swim throughout your mouth and cover your taste buds. For example, emulsified foods like butter, chocolate, salad dressing, ice cream, and mayonnaise promote a salivary response that helps to fload your taste buds with goodness. This is one reason why many people enjoy foods that have sauces on them. The result is that foods that promote salivation do a happy little tap dance on your brain and taste better than ones that don’t.

Rapid food meltdown and vanishing caloric density. Foods that rapidly vanish or “melt in your mouth” signal to your brain that you’re not eating as much as you actually are. In other words, these foods literally tell your brain that you’re not full, even though you’re eating a lot of calories.

 

Sensory-specific response. Your brain likes variety. When it comes to food, if you experience the same taste over and over again, then you start to get less pleasure from it. In other words, the sensitivity of that specific sensor will decrease over time. This can happen in just minutes. These are the most legal steroids.

Junk foods, however, are designed to avoid this sensory specific response. They provide enough taste to be interesting (your brain doesn’t get tired of eating them), but it’s not so stimulating that your sensory response is dulled. This is why you can swallow an entire bag of potato chips and still be ready to eat another. To your brain, the crunch and sensation of eating Doritos is novel and interesting every time.

 

Memories of past eating experiences. This is where the psychobiology of junk food really works against you. When you eat something tasty (say, a cookie), your brain registers that feeling. The next time you see that food, smell that food, or even read about that food, your brain starts to trigger the memories and responses that came when you ate it. These memories can actually cause physical responses like salivation and create the “mouth-watering” craving that you get when thinking about your favorite foods.

These factors all combine to make processed food tasty and desirable to our human brains. When you combine the science behind these foods with the incredible prevalence of food (cheap fast food everywhere), eating healthy becomes very hard to do.

 

II. How to Make Healthy Eating Easier

Most people think that building better habits or changing your actions is all about willpower or motivation. But the more I learn, the more I believe that the number one driver of behavior change is your environment.

Your environment has an incredible ability to shape your behavior. Nowhere is this more true than with food. What we eat on a daily basis is often a result of what we are presented.

Let me share an interesting experiment to show you exactly what I mean…

The Importance of Environment for Healthy Eating

Anne Thorndike is a primary care physician at Massachusetts General Hospital in Boston. Thorndike and her colleagues conducted a six-month study that was published in the American Journal of Public Health.

This study secretly took place in the hospital cafeteria and helped thousands of people develop healthy eating habits without changing their willpower or motivation in the slightest way. Thorndike and her team utilized a concept known as “choice architecture.” Choice architecture is just a fancy word for changing the way the food and drinks are displayed, but, as it turns out, it makes a big difference.

The researchers started by changing the way drinks were displayed in the cafeteria. Originally, all refrigerators were filled with carbonated soft drinks. The researchers made sure that water was added to each refrigerator and also placed baskets of bottled water throughout the room.

What happened? Over the next 3 months, the number of soda sales dropped by 11.4 percent. Meanwhile, bottled water sales increased by 25.8 percent.

Similar adjustments and results were made with food options. Nobody said a word to the people who ate at the cafeteria. The researchers simply changed the environment and people naturally followed suit.

Choice architecture is even more important when you’re already stressed, tired, or distracted. If you’re already worn-down, you’re probably not going to go through a lot of effort to cook a healthy dinner or fit in a workout. You’ll grab or do whatever is easiest.

That means that if you take just a little bit of time today to organize your room, your office, your kitchen, and other areas, then that adjustment in choice architecture can guide you toward better choices even when your willpower is fading.

How to Eat Healthy Without Noticing

Brian Wansink is a professor at Cornell University, and he has completed a variety of studies on how your environment shapes your eating decisions. Many of the ideas below come from his popular book, Mindless Eating. Here are some of his best practical strategies for using choice architecture to make healthy eating easier.

1. Use smaller plates. Bigger plates mean bigger portions. And that means you eat more. According to a study conducted by Wansink and his research team, if you made a simple change and served your dinner on 10-inch plates instead of a 12-inch plate, you would eat 22% less food over the course of the next year.

On a related note, if you’re thinking “I’ll just put less food on my plate” … it’s not that simple. The picture below explains why. When you eat a small portion off of a large plate, your mind feels unsatisfied. Meanwhile, the same portion will feel more filling when eaten off of a small plate. The circles in the image below are the same size, but your brain (and stomach) doesn’t view them that way.

2. Want to drink less alcohol or soda? Use tall, slender glasses instead of short, fat ones.

Our brain has a tendency to overestimate vertical lines. In other words, taller drinks look bigger to our eyes than round, horizontal mugs do. And because height makes things look bigger than width, you’ll actually drink less from taller glasses. In fact, you will typically drink about 20% less from a tall, slender glass than you would from a short, big glass.

3. Use plates that have a high contrast color with your food. When the color of your plate matches the color of your food, you naturally serve yourself more because your brain has trouble distinguishing the portion size from the plate. Because of this, dark green and dark blue make great plate colors because they contrast with light foods like pasta and potatoes (which means you’re likely to serve less of them), but don’t contrast very much with leafy greens and vegetables (which means you’re likely to put more of them on your plate).

4. Display healthy foods in a prominent place. For example, you could place a bowl of fruits or nuts near the front door or somewhere else that you pass by before you leave the house. When you’re hungry and in a rush, you are more likely to grab the first thing you see.

5. Wrap unhealthy foods in tin foil. Wrap healthy foods in plastic wrap. The old saying, “out of sight, out of mind” turns out to have some truth to it. Eating isn’t just a physical event, but also an emotional one. Your mind often determines what it wants to eat based on what your eyes see. Thus, if you hide unhealthy foods by wrapping them up or tucking them away in less prominent places, then you are less likely to eat them.

6. Keep healthy foods in larger packages and containers, and unhealthy foods in smaller ones. Big boxes and containers tend to catch your eye more, take up space in your kitchen and pantry, and otherwise get in your way. As a result, you’re more likely to notice them and eat them. Meanwhile, smaller items can hide in your kitchen for months. (Just take a look at what you have lying around right now. It’s probably small cans and containers.)

Powered by WordPress