Wednesday, 27 September 2017

labtop

Astudy just appeared in Education Next, under the title “Should Professors Ban Laptops?” The study worked like this:
Researchers went to West Point and tracked students in three sections of Principles of Economics. One section was technology-free—no laptops or tablets permitted in the classroom. A second section gave students the freedom to use laptops and tablets at their discretion, with no controls or requirements. A third section was “tablet only,” a method “designed to replicate the intended use of Internet-enabled technology as a non-distracting resource during class.” The aim of this section, and of such methods generally, was to implement technology in the classroom while preventing students from hijacking it for non-academic purposes.
The experiment was run with 50 classrooms and 726 students over two terms. Each instructor, too, taught at least one no-technology section and one of the other two sections. The decisive measure was performance by students on the final exam. The results were striking—and disappointing for people who believe that better classroom technology and implementation will produce higher student achievement.
Here is the finding for unrestricted technology use relative to no technology use: Exam scores dropped by 0.18 standard deviations.
And here is the finding for restricted technology use relative to no technology use: Exam scores dropped by only slightly less, 0.17 standard deviations.
The small difference suggests that attempts to streamline classroom technology to academic purposes alone are ineffectual or, when they are effectual, indicate that something inherent in the technology is part of the problem.
When we convert the numbers to GPA measures, the finding goes like this:
[A] student in a classroom that prohibits computers is on equal footing with a peer who is in a class that allows computers and whose GPA is one-third of a standard deviation higher—nearly the difference between a B+ and an A- average, for example.
There is more. When the researchers broke the sample up into subgroups by race, gender, college-entrance exam scores, and high school GPA, “in no group did students appear to significantly benefit from access to computers in the classroom.”
The findings support those of us who have banned technology from our classrooms for many years. We have been called “Luddites,” people captive to “moral panics,” and get-off-my-lawn curmudgeons. Just the other day, in a puerile defense of Twitter and texting as writing platforms in the Wall Street Journal, an English teacher referred to people who bemoan the writing that takes place on social media as “schoolmarms.” (The piece stands behind a paywall.)
But while the pro-technology innovators have typically cast traditionalists as hidebound and unempirical people caught up in myths and anxiety, the truth is the opposite. Technology enthusiasts are the real ideologues in this debate (and a lot of them make a whole lot of money on the wiring of schools). The empirical evidence against computers in the classroom is mounting (the Education Next article reviews several other studies).
At the very least, the jury is out on the value of computer-assisted instruction. Some day we may have evidence of genuine academic advancement arising from the outfitting of classrooms and students with the latest devices, which cost millions of dollars. Until then, teachers should draw back, return to pencil and paper and chalkboards, and determine for themselves whether the promises of digital instruction are just so much hot air.

look better

get your face in shape

Forget Botox! 4 Ways for You to Look and Feel Young
It’s no secret that women and men alike are constantly searching for the “fountain of youth” with the latest beauty products and cosmetic treatments that are available. Naturally, everyone wants to look and feel young. Although an increasing number of people are relying on Botox to stay young, there are a number of other ways to reduce the effects of aging for more natural features. Here are 4 ways for you to look and feel young.
1. Use a Honey Masques
Honey is a natural product that works to reduce the size of pores and firm the skin, while also reducing the appearance of sunspots that may be visible. The honey also helps to remove infectious microbes that can lead to breakouts and wrinkles for an incredible way of reducing the signs of aging within minutes.
2. Apply a Night Cream
To enhance the elasticity of your skin and restore lost collagen, it’s important to use a night cream that can soak into the pores overnight. Use the Resurgence Night Regime for a hydrating product that allows skin to look younger and smoother by improving the firmness by 42 percent.
3. Use Supplements on the Skin
Instead of undergoing Botox, natural supplements can have the same effect on the skin by infusing the pores with vitamins. Apply retinol, madecassol, and vitamin C serum to stimulate collagen growth and plump the skin for a natural look that still allows your facial muscles to have mobility with your expressions. The natural supplements are healthy for the pores and will prevent infusing your skin with toxins that can be hazardous to your health and beauty.
4. Use Sunblock
One of the most effective ways to protect your skin from sun damage and prevent wrinkles is by applying sunblock each day, which you can make at home for a natural recipe. You can also use cosmetics that contain SPF to protect your natural glow from UVA or UVB rays and allow your skin to stay hydrated when spending time outdoors  

Beta carotene is found in dark green and yellow-orange vegetables such as carrots and cantaloupe melon. It is one of a family of naturally occurring nutrients called carotenoids, 60 of which occur in food. Beta carotene is considered to be one of the most important carotenoids because it can be converted by the body into vitamin A as and when required.

Each Healthspan tablet contains 7mg of natural beta carotene, which is in line with the Department of Health’s maximum recommended intake for safe consumption.
Carotene originates from the Latin word for carrot and refers to organic compounds which give plants and vegetables their yellow/orange pigment. There are around 60 carotenes found in food.Beta carotene is considered most vital for health as it is a provitamin. This means the body can convert it into vitamin A, which is essential for many biological processes and could help strengthen the immune system. Sweet potatoes, carrots and spinach are rich sources of beta carotene.
  • What does it do?

    Beta carotene produces the highest levels of vitamin A compared to all other forms of carotenes. The antioxidant properties of this vitamin help protect the body from damage caused by free radical molecules. A study on elderly patients published by the American Journal of Clinical Nutrition(i) revealed a regular intake of beta carotene supplements could stimulate immune response and help fight off infections.  
    According to the University of Maryland Medical Centre,(ii) an intake of 15mg of beta carotene could also support nerve cells in eyes and combat conditions such as age-related macular degeneration (AMD) and cataract. A study involving 976 participants(iii) revealed the antioxidant properties of beta carotene helped protect eye cells and could slow the progression of AMD. 
    Symptoms of cognitive decline, such as memory loss, mood swings and depression, could also be prevented by a regular dose of beta carotene. A study on 5,956 men over the age of 65 showed long-term beta carotene supplementation could reduce levels of oxidative stress associated with cognitive decline.
Like cabbage, cauliflower, broccoli, Brussels sprouts, mustard cress and many other ‘greens’, watercress belongs to the brassica family which provides a rich source of protective phytonutrients (plant chemical compounds) that scientists believe may help prevent and fight a wide range of cancers (i).
During both World Wars when we were reliant on local produce, watercress sandwiches were a national institution but sadly, as our diets became more varied and increased competition from more ‘exotic’ and sweeter leaves took centre stage, watercress gradually became relegated to a mere garnish left on the side of the plate.
However, watercress growers refused to be side-lined and slowly but surely research into this leafy wonder’s nutritional greatness has earned it an impressive array of ‘super’ stripes, making it a worthy player in the health defence game.
รน

This vitamin and antioxidant-rich fruit can support the immune system and help with detoxification,” says Louisa. It can also provide the following health benefits:
Aids weight loss
Grapefruit is very low in calories, consisting of around 42kcal per 100g. Enjoying it as part of a balanced diet can be beneficial to weight loss.
In a study published in the Journal of Medicinal Food, 91 obese patients were given fresh, juiced or capsule forms of grapefruit alongside a placebo to discover the benefits on weight loss and insulin regulation. After 12 weeks, the fresh grapefruit group had lost 1.6 kg, the grapefruit juice group had lost 1.5 kg, the grapefruit capsule group had lost 1.1 kg, and the placebo group had lost 0.3 kg. Results also found that eating half a grapefruit before a meal significantly reduced weight gain. Insulin reduction was also improved (i).
Lowers cholesterol
“Grapefruit contains the soluble fibre pectin which can support healthy cholesterol levels,” says Louisa. Pectin could help lower levels of LDL (bad) cholesterol and triglycerides, a form of fat linked to heart disease. A 2006 study published in the Journal of Agricultural and Food Chemistry found both white and red grapefruit decreased serum lipid levels in coronary atherosclerosis patients (ii).
Strengthens cells
“Grapefruit is an excellent source of vitamin C, with half a grapefruit giving you your daily requirement of 40mg,” explains Louisa. “It is also a good source of beta-carotene, which can be converted to vitamin A in the body, vitamin B5, and antioxidants. The pink and red varieties also contain lycopene.”
Lycopene is the substance which gives certain fruits and vegetables their red colour. It is packed with antioxidants that could help strengthen the thickness and fluidity of cell membranes, vital to protect the body from diseases such as macular degenerationcataractsand heart disease

Sprezzatura

Sprezzatura, an Italian word originating from Baldassare Castoiglione’s book, The Book of Courtier, states that sprezzatura alludes to a certain nonchalance, so as to conceal all art and make whatever one does or says appear to be without effort and almost without any thought about it.
It seems that with each hour the Englishman spends attending to the fine details of dressing, the Italian gentleman will spend an equal amount of time making it look as if he has not attended to the fine details of dressing. And, perhaps this is part of the reason that Neapolitan tailoring continues to endure, since it not only describes a specific style, but also an attitude towards putting others at ease, being naturally elegant, and a spirit of not-so-accidental nonchalance