I Am Looking at Buying a Kitchen Table and It Is Made of Birch. Is This a Good Wood for a Kitchen Ta

Birch is a hard wood and it is very durable!

1. Are there any preservations on cutting down Silver Birch Trees?

Are Silver Birch Trees Protected

2. How can you trim a weeping white bark birch without killing it or a large section of the tree?

Trimming Birch Trees

3. Black Knot - can this spread to Birch trees?

No - it wo not spread to your birch trees. It only affects plum and cherry trees...and of those, some species are more susceptible than others. No, it can not be cured. You need to prune out the infected parts as soon as you see them. Looking at the plants in the winter, when they are dormant with no leaves, makes it easier to see the affliction. Take with you a bucket of water with a few tablespoons of bleach. Dip your pruners in the solution between each cut, to minimize the possibility of transferring the bacteria with your tool. Cut about 6 inches or more BELOW the visible infection, to make sure you've cut it back to completely healthy wood. Being vigilant is the only treatment available. Some have reported that spraying the whole tree with fungicides in the spring (when the spores take wing) helps slow the spread. But as the disease is a bacteria and not a fungus, that probably has something to do with the mixed results. Removing any affected wild plums in the vicinity will help.

4. New growth on river birch appears to be burnt?

Sounds like a touch of frost to me. If you can still see some green further on in the bud, than I think it will bounce back. Good luck

5. What wood grain best matches or accompanies birch?

Maple. It's hard to tell the difference

6. Growing paper birch from seeds?

Normally they need a period of cold or stratification, but you can accelerate their growth with the use of grow lamps. Sow the seeds on the surface of wet seed starting medium such as Jiffy-mix and cover with a sheet of glass or plastic. Expose to 24 hour fluorescent light 12" above the tray for 9 days. Alternate light/dark in 12 hour cycles for the next 7-10 days. Ventilate the tray when germination starts. Do not let the seeds dry out during this treatment or they will die. Keep the seed tray at 65-80F until germination. Once the majority of the seeds have germinated move to 55-75F. Keep moist and well ventilated. Fertilize with 1/4 strength 20-20-20 water soluble fertilizer at every watering. When two sets of true leaves have appeared transplant to individual pots. Grow on for 6 weeks in light shade after transplanting. Move into I gallon pots of good quality compost potting mix. Move to full sun keep watered. Trees should be 12-20" tall at the end of the first year. In the second year transfer into 5 gallon containers in early spring.

7. Do you think Fox TV has ties to the old John Birch Society?

Although I do not technically agree with what you are saying, I do think unleashing all their venom on Obama will incite some crazy person to violence. They make Obama out to be evil incarnate and I think it's criminal because some really stupid, vicious, violent person or group could assassinate him as a result of what they've instigated. Yes, Limbaugh and Fox are nothing short of criminal with their lies and innuendo. People do not have the right to scream "Fire!" in a crowded theater. Nor should anyone have the right to complete character assassination without substantiation. They say anything and everything and there's no independent agency calling them to task for their lies and when they are not lying they are engaging in innuendo. Like I said, it's a crime not only against obama but society as well.

8. Are these birch or aspen trees?

Turns out this is harder than it seems from just the picture...The three candidates I think one could most argue for are:Here is a picture of Populus tremuloides from the USDA:Notice the smoothness of the above Aspen bark (identical to that of the picture in the OP's question). Now compare it to the peely nature of typical birch bark (here pictured B. papyrifera or paper birch):Though not all birch species have peely bark: (my emphasis below) Here are images of European white birch (left) and gray birch (right) :But Gray birch remains smooth, even at the base of the tree (though see here)...Pay attention to the bottom of the trees in the OP's picture. The bark at the base of the trees is becoming furrowed:Zoomed in OP picture: This base furrowing is a characteristic of P. tremuloides:Here is a close-up of furrowed aspen bark from the USDA website (yes, this is still aspen):However, this furrowing can also occur in paper birch. I will comment that I have never seen paper birch with furrowed bark at the base. Further, I was unable to find visual evidence from any reputable sources by searching on Google. So what about tree shape and form?Again, according to The Sibley Guide to Trees:Citing a different source (Field Guide to Trees of North America) to address different language to differentiate the species:The smaller trees in the front left of the OP's picture demonstrate a more birch-like architecture and have branches growing along the stem as the description for B. papyrifera describes. These qualities are reduced or eliminated in the larger trees in the OP's picture.For visual clarification, the typical pyrimidal crown shape of P. tremuloides is shown below (from Oregon State Department of Horticulture). The trees in this image appear more slender (pyrimidal) than the trees in the OP's image, but aspen trees can also have "round" crowns as stated above. The following photo from Michigan State University Extension's Tree ID Key attempts to demonstrate a difference between paper birch and aspen crown coloration: The crown branches/twigs visible in the OP's picture seem to be lighter colored, and so this line of evidence points to aspen. Ok, so what about size? According to Field Guide to Trees of North America the typical sizes of the species under question are fairly similar, but with gray birch being smaller than the other two species:The relative sizes of the trees in the OP's picture do not seem to preclude any of these species.Both birches and aspens develop yellow leaves in autumn, so this characteristic additionally is not useful for differentiating the two genera (or 3 species). the OP's image is far too zoomed out to make out any lenticels (even when zooming into the OP's picture). Those black spots are not lenticels; they are scars (generally from lost limbs). Regardless, other species (including some aspen species) also develop lenticels.Here is a close-up of lenticels. The little slits are birch lenticels (here from B. papyrifera): Names on files and webpages are notoriously incorrect so using that as a line of evidence is dangerous. I saw a number of misidentified species in pictures while I was searching myself.So thus far it seems as though aspen is a pretty good choice, but paper birch could also be potentially correct. The distance of the picture makes this distinction difficult, but I will point to the two lines of evidence that have convinced me that some of the trees are in fact paper birches. Conclusion = Hard to tell, and likely actually a mix of Paper Birch (Betula papyrifera) and Quaking Aspen (Populus tremuloides). I think you are looking at taller aspen and mostly wider paper birch.

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How to teach image processing and computer graphics to a blind student?I think you can teach 2D graphics using a tactile approach on a phone or tablet. Students are very likely to be used to tracing their fingers over a mobile device (I have watched awesome videos of blind iPhone users in action).So position and shape change of an object could be detected by them dragging their fingers over to get auditory feedback at the edges. Ideally you want a truly tactile surface but I do not know of any such devices. I have my own reasons for wanting a computer-controlled version of one of these For actual image processing maybe map colours to tone, so as they move their finger over an image they hear a tone vary depending on the average pixels underneath. Then, as transforms are applied, the tones would change. You could possibly teach colour theory by varying the mapping to only one channel of RGB.Update in one of those great examples of synchronicity, a few days after writing the above I was listening to Matthias Tretter of MindNode on a podcast mention how he had been convinced to add accessibility to MindNode, a visual mindmapping product by a blind user. His blog posting has videos showing VoiceOver in action. This is a bit tangential to the original answer but a nice anecdote about how preconceptions about the intended purpose of a tool as being visual does not rule it out for blind users— — — — — —Image processingUS 6137498 also granted as EP 0852363 - (Main article: Photographic mosaic)Robert Silver's patent on his photographic mosaicing technique. The UK part of the European patent is currently undergoing revocation proceedings, the results of which may be important in comparing the practice of the UK Patent Office with that of the European Patent Office.US 6384822 (Main article: Shadow volume)A patent covering the technique commonly known as Carmack's Reverse.— — — — — —Quantum image processingQuantum image processing (QIMP) is primarily devoted to using quantum computing and quantum information processing to create and work with quantum images . Due to some of the astounding properties inherent to quantum computation, notably entanglement and parallelism, it is anticipated that QIP technologies will offer capabilities and performances that are, as yet, unrivaled by their traditional equivalents. These improvements could be in terms of computing speed, guaranteed security, and minimal storage requirements, etc. .— — — — — —What are True Positive and False Positive with reference to image processingA ,,true'' positive would be an image that has a property (in the context of face detection maybe: ,,contains a face'') and that is recognized by a program as such. A ,,false'' positive then is one that does not have the property but is recognized anyway— — — — — —How is the digital image processing of photographs related to bitmapped painting ?I love this LC! One of my faves by you. The idea of pictures and photography of humans remains selfish in a way. A photo never captures the moment. People always stand together, arms on one another, making their perfect camera smile, but you still do not understand the truth of what was happening at that moment. So on the opposite end, I propose this: we should take pictures of all memories. If you are at a party and someone is angry and crying, take a pic! That is the truth we should try to remember--not just the happy times but rather all of the moments of our lives— — — — — —If I were to test my concepts and knowledge of the image processing domain, what questions should I ask to myself?Try to think in terms of problems at low level, mid level and high level vision. How to denoise? How to detect edges? Basics of JPEG. How does the hough transform work? Internals of image descriptors like SIFT. Basics of camera model. Someways to achieve image segmentation. How is image/scene recognition being addressed?Also, pose yourself real-world/toy problems and see how you will go about solving them. How will you find the salient segment of a video, for example— — — — — —where can i download text book "Digital Image Processing" by Gonzalez R. C & Woods R.E.,?There is no free and legal place to download this textbook. I suggest you check used textbook stores and purchase a legal copy. Unless the author AGREES to work for free, it is not LEGAL. Few authors can afford to give their work away for free.
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