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How is the Quality of the Lens Determined?

Posted by on Feb 16, 2017 in Industrial & Commercial | 0 comments

When an average person talks about lenses, what do you think is the first image that comes to their mind? They’d probably mention cameras in general – but the most common are the professional camera. However, there are several devices that make use of lenses aside from cameras such as microscopes, periscopes and much more. A lot of medical equipment make use of such component as well. Each of these lenses is designed for a specific purpose, but before they make it to the device that they are designated for, they go through an MTF test first. It is just like a quality control check to see whether or not it passes the standard test. Companies like the image-science.com conduct such tests.

The quality of the lenses is getting more significant these days. And one of the major reasons for this is the growing demand for the megapixels found in most of the digital cameras today. Even smartphones demand higher megapixel to accommodate the quality they are looking for in DSLR cameras, but too heavy to carry them around. The resolution of the digital photos is dependent on the lens quality of the camera, and not by the body of the camera itself. It is because of this that professional and amateur photographers are quite keen about the lens quality of the camera because it will affect the resolution of the photos they are taking. And to do that, they need to learn how to read MTF charts. The basics are shared below for you to know better in choosing a lens.

Most people are familiar with the image resolution concept. However, most information is focused too much on this particular metric. Resolution only focuses on how much detail the lens is capable of taking. It doesn’t necessarily focus on the detail quality being captured. The other factors contribute to the performance of the lens, thus is affects the perception of the sharpness and quality of the digital image.

Take for example when an object or image passes through the lens. There are a lot of explanations out there that can be very confusing for an average person to understand. There are diagrams online that show how the image is being translated through the lens. These images are presented in alternating lines of black and white, thus referred to as line pairs.

The MTF or Modulation Transfer Function quantities in how well the regional brightness variants of the subject are well preserved when they go through the lens. A perfect curve in the MTF test results reveals that it is the perfect lens to have. But always keep in mind that there is not a single lens that has gotten the perfect MTF score.

If you see an MTF figure of 1.0, it presents the perfect preservation of contrast, while the figures less than the mean above that more contrast is getting lost, until it reaches an MTF figure of 0. At this figure, the line pairs can no longer be distinguished.

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Saying ‘Goodbye’.

Posted by on Feb 7, 2017 in Uncategorized | 0 comments

Being able to offer a foster home to a child is a wonderful gift and while it is full of its daily challenges it isn’t without its joys. Fostering can give children that permanent home they crave but other children move on away from a foster family either back to their own parents or relatives or to another placement. This happens for a lot of reasons but as agencies like nextstepfostering.org will tell you it isn’t always easy to do.

There are a lot of reasons a fostering placement can come to an end and the best reason is that the original family are now able to care for their child. Sometimes a single mother or father can become overwhelmed with their children, or if they are suffering illness they ask for help through the fostering networks and find some respite from their children. The fact they may then be well enough to take back that responsibility is an absolute blessing.

Older teenagers may finally be ready to live independently and in this case, the foster carer will likely have played a large part in helping to prepare them for living alone. Helping them learn to cook, care for their own clothes and even make a bed properly is part of that so it may feel very much like one of your own flying the nest. Some foster children may get adopted out by other families and as a foster carer you will be able to make that transition as smooth as possible for the child. In some cases the child you’ve taken on may have additional needs that you as a foster carer simply cannot meet. It doesn’t mean you’ve failed them it just means that there are other foster carers out there on networks like nextstepfostering.org that are better equipped to deal with those additional needs.

Whatever the reason for a child leaving your care it is an emotional time and you’ll experience everything from sadness to pride when a child leaves your home. Sadness to see them go will be mixed with happiness to see them move into a more permanent situation and be all the better for knowing you. Foster carers undertake ongoing training to allow them to cope with children leaving their care. The point of foster caring is that it is temporary and you are there to assist in the growth in development and understanding of a child and support them through transition. To be able to have a long term placement with a child and know they are moving off to an adoptive family or moving into their own flat should bring a sense of pride.

A lot of foster children go into a family scared and twitchy, for lack of a better word, there are those who are also full of rage and defiance of their circumstances. These are the children that find it harder to integrate at the ones who go off stronger and happier in the end and that is down to you; their foster carer.

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Helping Your Child Cope With A New Addition

Posted by on Feb 7, 2017 in Uncategorized | 0 comments

Having a baby is a big adventure. When you’re pregnant for the first time, every feeling and symptom is brand new and exciting. If you’re not working, you can cope with the exhaustion by having long and luxurious naps during the day, you can visit the gym and gently work out. If you want to take a stroll outside in the park you can, one hand on the ever growing and moving bump. Labour is ahead but you believe you will be breathing that little sucker out and glitter shall rain down upon you all. Having a second baby… still an adventure but it does have its difficulties.

Depending on the age gap of your children, you may be heavily pregnant with a toddler at your feet. Trying to deal with the overwhelming exhaustion with a small child at your knees demanding attention and nappy changes is not easy to cope with. We all do, of course, but what happens when you go to bring your second little prodigy home? How does your older child cope? This is something you didn’t have to panic about the first time around so this time you’ve got new situations to cope with while pregnant; never easy! If you are looking into foster a child then there are many kent fostering agencies that will be able to counsel you through bringing another child into the home and how to help your existing children deal with the changes that come with a foster brother or sister. Being able to cope with the changes as a family is something you all have to deal with. Bringing a new baby home from the hospital is exciting and your toddler or older child will have known you are having a baby.

If your child is over the age of five, getting them involved and excited throughout the pregnancy itself is the best way to prepare them to meet their new sibling. When the baby comes, ensuring you keep up time one on one just for them and for you is important so you haven’t allowed them to feel forgotten or second best against the squidgy little baby in their lives. If you have a toddler they have less of an understanding. Be prepared for your little pre-schooler to perhaps resent you a little and maybe have feelings of being replaced even though that isn’t true, they won’t be able to understand that unless you make it very clear even when baby arrives that no one could replace them.

There are cases where existing toddlers are uninterested in their new sibling for a few months. The baby doesn’t become interesting to them until it is crawling or being more active and able to play with them and that is okay! Keep trying to get them involved with their care: bringing nappies or helping you hold a bottle, but don’t push.

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An Advice Guide to Terrible Toddler Tantrums

Posted by on Jan 12, 2017 in Uncategorized | 0 comments

Children are beautiful creatures in their nature. They are pure, innocent and so inquisitive to the world they have been brought into that they are constantly trying to find something new to love. The trouble is that children are also basically pint sized dictators who run a house with an iron fist. They do not have a concept to be told no and understand why they are being told no, and to that end they spend a lot of time upset over their situation.

Children tend to show a natural aggression during the “terrible twos” when they want to have control over their surroundings and engage in aggressive outbursts when they can’t. Tiredness and frustration are also triggers for this aggression and while it sounds like a strong word to use for a toddler, it is correct as they have little control over their reactions to situations. There’s no rationale just yet and rightly so; they’re still babies and still learning to explore the world. children often do this by putting everything and anything into their mouths. Biters often tend to be the youngest child in a family because they feel small and powerless compared to older siblings who seem stronger, can communicate better and are more able to get what they want.

It’s a basic parenting fact that toddlers behave the best when they are given limits that they can understand. For example, a 2/3 year old may understand that drawing on paper and colouring books is a good thing, but that if they take that pen to the nearest wall they’re likely to witness a vein popping out of their parents’ head while they try not to yell. Rules provide stability and predictability and when if you have ever participated in Childcare courses, you will know that you are often told to establish rules very early on. Nurseries and schools should have a policy for dealing with inconsiderate behaviour. Most problems tend to occur during outside play when children get over-excited. If after two warnings, a child continues to bite/kick/hit, having them sit for two minutes can really help them to calm down. Seeing all the other children playing happily and not being able to join in is usually enough.

We go through life knowing our actions have consequences and the younger a child learns this, the easier enforcing those consequences can be. Sometimes, and it’s to be expected really, toddlers do not behave as we expect. Of course they don’t! They are small versions of us who have no understanding of danger and only understand what they want and that they must get it. Even if what they want is to stick tiny fingers into open plug sockets. If you raise a voice and say ‘no’ then that is essentially taking from them the thing they want to do. The chain reaction from this is crying, screaming and a wonderful toddler tantrum. The best thing to do with tantrums is let them burn out and perhaps sit the child in a safe space they can kick and scream. Oh, and ignore them. By reacting to the tantrum you are essentially giving them attention and bad behaviour should not attract any attention.

By allowing the tantrum to burn itself down into a calm, you can then talk to your child in a calm voice and use that time to gently explain the dangers of sticking fingers into plug holes. Of course, this won’t always work, but the only way to communicate to a toddler is with rationality and calm. Yes they should react angrily, you’ve just taken from them what they want, if it was the other way around you’d be angry too! But that doesn’t mean a tantrum is acceptable and learning that at a young age will always stand them in good stead.

 

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Dangerous Molds: A Guide

Posted by on Jan 5, 2017 in Uncategorized | 0 comments

Toxic mold refers to molds that produces these toxins and lead to exposure to high levels of these toxins. Issues with the sinuses, skin and respiratory system are just some of the symptoms that have been documented as a result of mold exposure. Others include headaches, yeast infections, aching joints, asthma and fatigue. There are three main causes of mold in the home and companies that deal with mold removal in Waterford MI often hand out literature detailing what to look for. The first thing to look for is dampness. Damp patches that stain the ceilings, walls and floors both internally and externally. Peeling wallpaper is an easy clue to damp in the walls. Tide marks on the wall which is caused by evaporation and salt forming on brickwork are also large indicators. Rising damp or structural dampness, should be tackled urgently as well as poor drainage.

Mold can arise if gardens and pond waters near a home are there without adequate drainage. The problem should be sorted as soon as possible in these cases as they can also cause flooding. Lack of ventilation is another cause for residential mold. Homes should always be well ventilated throughout the year, especially in winter. Windows should be opened to let in fresh air and this should happen after water leakage and steam from the bathroom. These can also contribute to mold development, which is why extractor fans are frequently installed in new build houses. Adequate ventilations being observed leads to mold being eradicated and without returning.

It’s important to call in the experts when it comes to mold but there are things you can do to tackle small patches of it yourself. By keeping on top of the smaller patches you can make sure you avoid bigger patches developing. The dangers of mold in the home are well known but are not receiving the deserved media attention of other issues like asbestos, yet mold can be just as dangerous and pose serious health issues. Mold is a fungus that is more often associated with old food but can also be found on damp materials. It can be black, green, white or almost any colour and often looks like a stain or smudge and it may smell musty. Spores get released into the air which are so tiny that people can actually breathe them in without knowing about it.

Companies that specialize in asbestos removal in Waterford MI are often called out for mold reasons as the issues caused by asbestos are similar. Mold in the home can lead to a whole range of illnesses including respiratory problems that can then expand into other scary illnesses. There have been many documented cases of sickness due to mold in and around the home and these illnesses can get worse. Some molds that are found in the home are extremely dangerous to humans and produce mycotoxins that can pose a risk not just to humans, but to pets.

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