Circular Limited Sums

Try it online! This is a direct translation of xnor's Python answer and my first MATL answer, so it's most likely not optimal. E.g. there is likely a shorter way to get an upper-left triangular matrix of ones than t&lYRP. Edit: And it turns out there is, namely :&>P. Thanks to Luis Mendo for -1 byte!.

Circular Limited Sums 1

1. Can a disc resurfacing fix the Xbox 360 circular scratch?

go to blockbuster for any disc problems i know in canada they fix the scrathchs

2. PHYSICS HELP WITH CIRCULAR MOTION!?

If the bicycle proprietor leans in, yet keeps his velocity, the centrifugal stress will develop. This easily makes it much less annoying to slip. the actual reason is that if the cycle is vertical, the only stress against the line is the burden of the cycle and rider. via leaning in, the bicycle proprietor directs a number of the centrifugal stress in direction of the line, increasing the frictional stress, which permits forestall slipping

Circular Limited Sums 2

3. Should castle walls be circular or square?

There are many reasons:StonesIt's more difficult to sculpt semi-circular stones than straight stones. In order to have a perfectly round wall/tower, each stone needs to have the perfect shape, not a big square. That's a lot of work!InsideIn a square room, furniture are easier to build. Along a straight wall, you can easily make a corridor. In medieval times, the castle was very often a place where a lot of people were living. Workers were building theirs workshop against the wall. It's easier to build something new against a straight wall than a round one.But? The round towers?Yes, there ARE some round walls and tower. In fact there is not much round walls in the X-XI centuries, but more and more with time until the XV century where there are almost every time round towers. The apparition of canonball changed the architecture.Arrows (and stones launched by a trebuchet) are easily stopped by a wall (square or round), but canonball are not so well stopped at all, so they began to build round towers to make canonballs slip on the wall instead of breaking it. Carcassonne city, IX to XIII century (France): Salses Castle, anti-canonball, XV century (France too, what a lovely country for castle lovers): See? Old castle: little round towers against arrows and stones, big straight walls.More recent castle: big round towers against cannonballs.

4. What's the life of the average diamond circular saw blade?

tell the seller your cutting objects and your other requirements, they will suggest the right blades , ChinShine produce top quality diamond blade with competitive price.

5. Circular permutations - confusion in textbook example

Answered by Andr Nicolas in comments above: "The convention, particularly when one uses the term circular permutation, is that if arrangement $beta$ can be obtained from $alpha$ by a rotation, the arrangements are to be viewed as the same. Of course they are not the same, one chair is nearest to the kitchen. But I would say that the conventional answer is $6!$. ".

6. Calculus Help Please-Dimensions of A right Circular cylinder?

Draw a precise triangle with base = 5cm and top = 12cm This represents 0.5 the pass-component of the cone. in case you draw a rectangle "starting to be out of" the perfect perspective of the triangle, and touching the hypotenuse with its opposite corner, this could characterize 0.5 the pass-component of the cylinder. the two smaller triangles ("left over" from the rectangle) are in share with the better triangle. are you able to take it from right here? (Hypotenuse (a.ok.a. slope top) in case you like it, is 13cm. that's a regular Pythagorean triple.) additionally: the type of situation often consists of looking the size of the cylinder with the main suitable a probability quantity. is this the case right here? -------------------------.

7. regression with circular response variable

The pattern in the residuals is not necessarily a problem. One way to check this is to simulate a set of responses from the model that you just fitted (that is, under the assumption that the model is correct), fit a new model to the results, and plot its residuals. This gives you a measure of how weird you would expect the plot to look even if nothing were wrong. If you can reliably pick out the original model from several plots produced in this way, then you should start worrying about the residual pattern

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Circular Array Rotation C HackerRank
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You should definitely familiarize with the 'modulus' operator % - calculating the 'un-rotated' (original) position of the item to find is waaay faster than performing a hundred thousand rotations (k is up to $10^5$) of one hundred thousand-item array (n up to $10^5$). It is even faster than a single rotation.But that is for StackOverflow rather than CodeReview...1. Apart from the Earth, are there any other planets discovered that are extremely unique?'Extremely unique' is a very silly phrase. If something is unique there is, by definition, only one of it. How can you have 'very' one of something? As it happens, all the planets we know are unique - but that is probably because so far we do not know of very many. Only a few hundred have been discovered, and in most cases, we know very little about them. We may, for example, just have a minimum mass figure, and virtually nothing else, for lots of extra-solar planets. All the planets of the solar system are certainly different enough to rate as unique as far as our knowledge now runs. That is again a product of how little we know. It is very difficult to detect from earth extra-solar planets which are as small even as the largest of sun's planets, Jupiter. Most of the planets we know are in fact much larger than Jupiter, and also much closer to their stars. From that point of view, the planets mst likely to stay unique in our experience are Mercury and Neptune, because they would be the most difficult to detect from another star. (Mercury might just be detectable from another star if, as seen from that star, it passed regularly across the sun's disk, dimming the sun very slightly. Detecting Neptune would be desperately difficult, except by sheer luck. As to 'improbable features' of planets, we do not know enough planets to know what is likely or unlikely, and again, those we do know have kind of selected themselves by being detectable by the particular techniques we use, so they are all a bit similar in one way or another to all the others detected by the same method. As far as we now know, some solar system planets may be unusual: Mars - having had liquid water quite recently, but having lost it. Ditto possibly a liquid core and a magnetic field. Saturn - prominent rings (although rings seem to be common in themselves) Uranus - an axis of rotation very far from its axis of revolution.2. Conversion of rotation matrix to quaternionLet $mathcalA subset mathcalM_3times 3(mathbbR)$ be the space of $3 times 3$ real skew symmetric matrices. It is span by three matrices$$L_x = beginbmatrix0 & 0 & 00 & 0 & -10 & 1 & 0endbmatrix,quad L_y = beginbmatrix0 & 0 & 10 & 0 & 0-1& 0 & 0endbmatrix,quad L_z = beginbmatrix0 & -1 & 01 & 0 & 00 & 0 & 0endbmatrix $$ For each $A in mathcalA$, we can expand $A$ as $x L_x y L_y z L_z$ and associated a vector $vecA in mathbbR^3$ and a quaternion $tildeA in mathbbH$ to it.$$A = x L_x y L_y z L_z quadleftrightarrowquad vecA = (x,y,z) quadleftrightarrowquad tildeA = xbf i ybf j zbf k$$Let $mathcalA_u = ; A in mathcalA : |vecA| = 1; $. Given any rotation matrix $M in SO(3)$, we can find a $theta in ,pi]$ and $L in mathcalA_u$ such that$$M = e^theta L = I_3 sintheta L (1-costheta) L^2$$The $theta$ is the angle of rotation associated with $M$ and $vecL$ will be a unit vector in the direction of the rotational axis.When $theta e 0$ nor $pi$, we can extract $L$ out by taking the antisymmetric part of $M$ and then "normalize" the corresponding vector because$$ sintheta L = frac12 left(M - M^Tight)$$To fix the value of $theta$, we can use the relation $textTr(M) = 1 2costheta$.Once $theta$ and $L$ is known, the quaternion corresponding to the rotation matrix $M$ is then given by$$e^fractheta2 tildeL = cosfractheta2 sinfractheta2 tildeL = fracsqrt1textTr(M)2left[ 1 fracwidetildeM - M^T1 textTr(M)ight] $$3. If 𝑟 is a rotation and 𝑠 is a reflection, then 𝑟𝑠 is a reflection.Well, $D_n$ consists of precisely $n$ rotations and $n$ reflections, with identity considered a rotation by $0$ radians. All rotations in $D_n$ are order preserving, while all reflections are order reversing. The product of an order reversing map and an order preserving map is order reversing, hence $rs$ is order reversing, and therefore a reflection.To state this in terms of matrices, any rotation can be represented by a matrix of the form $$beginbmatrixcostheta&-sinthetasintheta&costhetaendbmatrix.$$ Which has a determinate of $1$. By choosing a proper basis WLOG we may assume that $s$ is represented by $$beginbmatrix1&00&-1endbmatrix,$$ which has determinate $-1.$ Then $det(rs)=(1)cdot(-1)=-1,$ so $rs$ is not a rotation, and hence is a reflection.
"ICNC" Breaks Through the Pain Point of 3D Printer, Turns Waste into Treasure, and Promotes the Deve
"ICNC" Breaks Through the Pain Point of 3D Printer, Turns Waste into Treasure, and Promotes the Deve
Nowadays, the strong wind of the fourth industrial revolution is blowing the assembly number of digital transformation. The digital production mode has a great impact on the development of manufacturing industry and is changing the mode of commodity manufacturing and the pattern of employment. In the industrial 4.0 era, we have ushered in a vast digital revolution.In this era of change, although we have experienced countless new scientific and technological products, in this era of fierce competition and faster and faster renewal, there are many new scientific and technological masterpieces that have not been immediately seen and touched by us all the time."Marquez ICNC" (the full name in Chinese is desktop laser engraving CNC all-in-one machine, hereinafter referred to as "ICNC") is a fresh factor in this revolution, which has attracted the attention and praise of the majority of makers and netizens since its inception."ICNC" is the "golden partner" in the field of digital manufacturingAnalysts pointed out that "ICNC" can meet the personalized, real-time, convenient and non-standard consumption level (small and medium-sized) production needs of schools, enterprises, makers, families and craft lovers, and can realize the processing needs of almost all maker inventions.Product R & D personnel said, "ICNC" is a desktop laser engraving CNC all-in-one machine. In fact, it is the "golden partner" of CNC engraving and laser engraving. The machine integrates many high-tech advantages such as computer graphics processing, digital information and control, laser technology, electromechanical technology and material technology, and perfectly realizes the multiplication effect of "1 1 > 2".The machine uses fully closed and transparent processing form. The processed items are simple, durable, safe, convenient and easy to operate, and the processing forms and materials are diversified. It can freely select wood, plastic, metal, leather, nylon, fiberboard, PCB circuit board and many other materials for personalized processing. Without computer control, it can quickly and efficiently turn milling and laser marking NC processing the original materials."ICNC" breaks through the series of pain points of 3D printersIn the intelligent hardware industry, "ICNC" is also known as "a dark horse after 3D printers". But in fact, "ICNC" has broken through some pain points of consumer 3D printers.It is reported that 3D printers use additive processing. At present, most of the commonly used consumer 3D printers can only process specific plastic materials, dissolve and accumulate them into a new state. The "ICNC" uses subtraction. However, compared with 3D printers, "ICNC" has higher precision, diversified processing materials, forms and application ranges, and the machine is more practical.According to individual needs, the machine can hand over freely selected raw materials such as metal and wood products and their own creative ideas to the machine, and complete the intelligent processing of materials and ideas with one key, so as to quickly turn ideas into reality."Small space, low cost, ready to use, high precision, time-saving and labor-saving, fast and efficient, strong safety, and can also be used for batch processing and production of parts." a senior maker said, "ICNC" has created a simple, efficient, economic, fun and high-grade maker model to truly realize the concept of "as long as you want, you can do" advocated by DIY, It is a classic in the era of diy2.0."ICNC" is a "new swordsman" in the field of maker education"ICNC" is currently regarded by many schools and netizens as a "maker artifact", also known as the "new swordsman" in the field of maker education.Since its launch, "ICNC" has appeared on the table of maker laboratories in many universities, primary and secondary schools to help countless small makers realize their maker dreams. In September this year, "ICNC" also appeared in the Sixth National steam Education Conference for primary and secondary schools, which attracted extensive attention; In November, it appeared in the final of the first "Jianghuai Ruifeng Cup" youth maker competition in Hefei to help children inspire inspiration and create good achievements. In addition, "ICNC" has also participated in many national education exhibitions and gained countless praise and praise.It is worth mentioning that the maker education practice base of Changzhou Affiliated School of Beijing Normal University also introduces "ICNC" in batches, mainly to enable students to stimulate their interest in science, mathematics, engineering, technology and design creativity through DIY practice, and promote the deep integration and sublimation of practice and theory, knowledge and thinking, reality and future, Help children shine the light of their dreams into reality.It is reported that the base was built at the expense of Xinhong education, including scientific and technological knowledge experience area, creation and processing area, scientific and technological maker teaching area and achievement display area, forming a complete maker steam mode, so that children can fully participate in it and design and create their own products."ICNC" can turn waste into treasure and promote the development of circular economyIn our life or industrial production, some "chicken rib materials" are often produced. It is a pity to abandon them and have no way to use them. For example, old or worn leather products, plastic products and metal products in life, or leftover materials and wastes of wood, metal and plastic materials produced in industrial production.However, once these "chicken rib materials" encounter "ICNC", they can start the "secondary entrepreneurship" mode. Makers can give full play to their imagination and creativity, and process these leftover materials, waste products or waste materials into exquisite handicrafts, tools or daily necessities, so as to turn the "chicken rib materials" into salted fish and turn waste into treasure."In this way, both waste resources and production accessories can be used as raw materials for secondary development. 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I Have a Diamond Blade for Masonry Will It Work to Cut Sheet Metal with a Circular Saw?
I Have a Diamond Blade for Masonry Will It Work to Cut Sheet Metal with a Circular Saw?
It MAY work, but it is NOT the proper blade for cutting metal. Most people at Lowe's know what they are talking about. You found one that does not1. Which holds better in polycarbonate (lexan)- machine screws or sheet metal screws?Use the correct cement and 1/4-28 (fine thread) screws. Drill and tap the holes ahead of time. Drill slowly as the drilling friction/heat can present some troubles in warping. Suggest stainless stell screw as you are in a wet environment. Can you also cement the parts together? Regards, Eric2. How do you print stuff on sheet metal as is done on Tin cans. What is (or are) this printing technology calledit is a two color spray jet system that pepsi devoloped I think the can is formed out of a cube then it goes to another station where it is filled with pop of pepsi (lets say) then it moves on to the top that gets crimped on to the can and still the can is new nothing on the outside but the convayer that the can is sitting on I think is modified or it passes it on to another machine that rotates the can and well it does a computer scans the can and a series of ink nossles spray the pepsi logo onto the can and it is put back on a convayor to the dryers and out to the inspectors and then to the store then you buy it and drink it3. questions about TRENCH WARFARE?1: During the invasion of France, the Germans vastly outnumbered everyone in terms of machine guns (where the Germans may have had one machine gun per platoon, the English and French only saw fit to have one per company). When the English and French tried to push back, they were cut down by the superior German firepower. The stalemate would have been deadly on level ground, so everyone dug in... so began four years of near-static warfare. 2: Everyone used it. Ideally, trenches are for defence only. You dig your trenches, establish fields of fire and kill zones, and wait for the enemy. When you destroy the enemy, you leave your defensive position, and push farther. But that's not how it worked during the first world war. Back then, it was nothing but back-and-forth (stretching from days to years) attacks whose death tolls greatly outweighed the strategic victories. Until the Battle of Vimy Ridge (the best moment in Canadian history) trench warfare went as follows: Artillery strikes would get the defenders heads down. Artillery stops. Defenders come out of shelters, take up firepositions. Infantry advances through hail of gunfire. The Canadians used a style of creeping barrage with infantry following immediately behind it, just far enough to be safe. By the time the Germans came out of their shelters, the Canadians were already in the trenches, and completely survived crossing no-mans land. Vimy Ridge had been attempted numerous times by the Brits and French, but with no success. After taking the strategic position of Vimy, the war turned, and stayed, in our favour. 3: It replaced the traditional method of standing around, waiting to get shot. 4: Well, like the answer to #3, yes it was effective at getting people out of the sights of enemy marksmen. However, because WWI was very static, trenches became more and more and more built-up and defended (such as the final defensive line of German trenches surrounding Germany, completely encased in concrete for example) while most battlefield trenches were just given extra wooden planks or sheet metal to contain the dirt during explosions. 5: Impact of this technology? A new method of warfare. Brutal, but a method nontheless.4. can you fiberglass over sheet metal?im almost positive but the glass will never stick to the sheet meatal! it may initialy but eventualy sooner then later it will seperate, even if you scuff it up, try shaping your project if thats what you r doing out of cardboard it makes a great mold,5. Painting Sheet Metal (Tin, I don't know if it's galvanized or not) - What do I do? Prime then paint?The only prep needed is to make sure the surface is clean. If you are dealing with any type of non ferrous metal (Galvanized, Aluminum, etc) you must ONLY use a %100 acrylic coating. In the instance of tin, this metal expands and contracts and if an oil/alkyd is applied (i.e. most aerosol products) it will crack and you will have a mess on your hands. Product Recommendation 2 coats DTM Acrylic (sherwin-williams) you can have this tinted to any color you want...kind of expensive, but you are paying for a professional product.
What Are Those Circular Driveways in Front of Mansions Called?
What Are Those Circular Driveways in Front of Mansions Called?
You can not expect someone to clean up a dead animal from the road. If it bothered you so much, you could do it yourself. Personally, I would not touch a dead animal. Between possible disease and possibly getting hit by a car myself, I would leave the poor squirrel be. I do not think it minds1. What is the best circular knitting device in your opinion?I agree with Aussie Sheila to a degree as there are alternatives (a regular home knitting machine with ribber will knit circular knitting beautifully), however if you absolutely HAVE to have one of these, and can not afford something like a sock machine, then the Addi Express seems to get the most positive reviews2. What are the differences between circular reasoning and proof by definition?Circular reasoning, sometimes referred to ad "begging the question" means using the conclusion as part of the proof. It's obviously invalid.Proof by definition is a less formally defined idea, meaning that a conclusion follows directly or with little deduction from the definition of a term. "0/0 is not a real number" follows almost immediately from the definition of division in the real number system. Proof by definition is absolutely valid.3. Difference between circular motion and rotational motionThe main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body's centre of mass and the axis of rotation remains fixed.Rotational motion is based around the idea of rotation of a body about its center of mass. In rotational motion, the axis of rotation and centre of mass could change whereas in circular motion, the axis of rotation and centre of mass does not change. Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path and can either have a constant angular rotation rate and constant speed, or it can exist with a changing rate of rotation.Think of one of those fairground rides where people sit on dummy horses. Now imagine the horses spin around the post that holds them to the base of the ride. Then you have both rotational motion of the horse and circular motion as the horses move around the ride.I think you may have this the wrong way round.Have a read of this link: Circular Versus Rotational Motion.4. Ball rolling down circular inclineAs you noted at the end in doing the integration to obtain $v-v_0=mgsin(theta)t$ you have assumed that $sin(theta)$ is constant which it is not.The analysis is easier if the ball does not roll and the frictional force is zero. The tangential force at any time $t$ is your $mgsin(theta)$.Also the linear speed $v$ is connected to the rate of change of angle $omega =fracdthetadt=dot theta$ $v=(Rr)omega$ where $R$ is the radius of the track and $r$ is the radius of the ball. So the linear acceleration $a=fracdv dt = (Rr) dot omega = (Rr) ddot theta approx R ddot theta$ if $R>>r$So you have to solve $gsin theta=R ddot theta$. Multiply both sides by the linear speed $v=Rdot theta$$v R ddot theta = v dfracdvdt$ and $vg sin theta = gR sin theta dfrac dthetadt$and integrate$displaystyle int ^v _0 v ; dv= gR int ^theta _0 sin theta ; d theta Rightarrow dfrac 12 v^2 = gr (1 -cos theta)$which is a long-winded way of applying conservation of energy directly.Gain in kinetic energy = loss in potential energy $Rightarrow dfrac 12 mv^2 = mgr (1 -cos theta)$To find the angle $theta$ as a function of time ie solve $gsin theta=R ddot theta$ for $theta(t)$ is much more difficult and WolframAlpha with the input of solve[theta''[t]=sin( theta[t])] tells me it requires the Jacobi amplitude function. So you now have $mgsin theta - F=mR ddot theta$ and $Fr = I_m c ddot phi$ where $ddot phi$ is the angular acceleration of the ball, $r$ is the radius of the ball and $I_m c$ is the moment of inertial of the ball about its centre of mass.$Rddot theta = r ddot phi Rightarrow F= dfracI_m cR ddot thetar^2 $Substituting for $F$ gives $mgsin theta = left (mdfrac I_m c r^2 ight ) R ddot theta$ with the bracket having an extra term from the equation when it was assumed that the ball was not spinning $dfrac I_m c r^2 $ which is the extra inertia due to the ball spinning.
10 Brazilian Deep Wave Hairstyles That You'll Love
10 Brazilian Deep Wave Hairstyles That You'll Love
Then, wrap the hair around in a circular motion and secure it with a hair tie. Add a little personality to the style by sectioning off a small bang at the front of your hair and let tendrils fall loosely in front of your face. You can also add multiple bobby pins to the side of your bun for decoration.How is circularity GD&T measured?Circularity measured at a particular section. Component held and rotatated, dial guage kept at any section. Max deviations in dail give circularity error. Watch video for more details:.Make a Circular ListContourPlot With Data at r incrementsWhen I understood you correctly, you have for each value of z a list of temperatures. Since you have not provided data, let us create some fake onesNow the only missing piece is that you have to make a coordinate transformation. ContourPlot will always use Cartesian coordinates x and y, but what you want to have is for each x,y the radius. Centering the origin in the middle, this is easy because you are just calculating the Euclidean distance like in school$$ r= sqrtx^2y^2.$$Indeed, this formula is part of the transformation to polar coordinates.Since you have only a list of temperatures for some r, we will interpolate the places in between and then, we can put this together and use ContourPlot as usual. Then you have it, a Manipulate that gives you the contour plot you like for a chosen z:Christians, which of these statements is circular reasoning?All of them. What did I win?What sound frequencies does a circular saw emit?Here is a whole paper dedicated to your problem... a study of a table saw's noisinessResolving forces on inclined circular motionI am going to assume no friction on the incline, since it can be added to what is said below, and does not add anything to the main ideas here.I have included a free body diagram of the car below:The thing to notice is the coordinate system we have chosen to use. The most useful orientation of coordinates is typically such that one axis is in the same direction as the acceleration of the object. The acceleration in this case is not down the ramp like in other inclined plane problems. Since we are undergoing circular motion, the acceleration is instead towards the center of the circle (to the left in the diagram). We therefore break the normal force into components along the acceleration ($N_x$) and perpendicular to the acceleration ($N_y$)$^*$. The usefulness is best seen by applying Newton's second law for each direction, knowing that the acceleration is only along the x-axis: $$sum F_x=-N_x=ma$$ $$sum F_y=N_y-w=0$$Here we see that just the vertical component of the normal force ends up balancing out the weight, and that the horizontal component of the normal force is responsible for the centripetal acceleration. This is also a pretty simple system of equations we can use to solve for the acceleration if we express the normal force components in terms of $N$ and trig functions.In any case, if we chose a coordinate system not oriented along the acceleration, then you would instead have to break the acceleration itself into components, which is typically more work for you if you are trying to find the overall acceleration. Let's explore this and use a coordinate system such that the x-axis is parallel to the ramp, like in our typical inclined plane problems. I have included a new diagram below of this:I have included the acceleration vectors this time as well. Let's apply N2L to this new coordinate system. $$sum F_x=-w_x=ma_x$$ $$sum F_y=N-w_y=ma_y$$Notice how now we have two equations dealing with the acceleration instead of one. This is not incorrect, but we just have to do a little bit more work if we want to determine the magnitude of the acceleration here. We have two vectors broken up into components here (acceleration and weight) instead of just the one in the previous case (the normal force). We can also see here that the normal force is not equal and opposite to $w_y$ like we usually see in inclined plane problems. This is because now $a_yeq0$. The acceleration has components both along and perpendicular to the incline.$^*$Compare this to what you are probably more used to with your typical inclined plane problem (like a block sliding down a ramp). In this case the acceleration is along the ramp, so we break up the weight into different components instead, one along the acceleration (along the incline) and one perpendicular to the acceleration.
Think Green Collection: Editors Choice  10 Best Images
Think Green Collection: Editors Choice 10 Best Images
Today weve chosen Pixabay 10 best green color images. Enjoy the green choice of our team.Green is the color of nature. It is associated with growth, harmony, freshness, and fertility. Green has strong emotional correspondence with safety. Dark green is also commonly associated with money.There lots of shades of green, natural and man-made. Check them all in our collection!Image by ju1959jjjGreen is the prime color of the world, and that from which its loveliness arises. Pedro Calderon de la Barca Image by SkitterphotoI just need green. I need to wake up and see grass and squirrels. I dont want to see skyscrapers. Andre Leon Talley Image by cegohI always say that candy is the perfect studio food it keeps your energy going. Nick Cannon Image by jeonsangoI believe a leaf of grass is no less than the journey-work of the stars. Walt Whitman Image by Free-PhotosIf there is a future, it will be Green. Petra Kelly Image by cocoparisienneDont be a fish; be a frog. Swim in the water and jump when you hit ground. Kim Young-ha Image by ulleoColorless green ideas sleep furiously. Noam Chomsky Image by jplenioFor in the true nature of things, if we rightly consider, every green tree is far more glorious than if it were made of gold and silver. Martin Luther Image by NietjuhWhen youre green, your growing. Ray Kroc Image by SkitterphotoNo object is mysterious. The mystery is your eye. Elizabeth Bowen All images and videos on Pixabay are released free of copyrights under Creative Commons CC0. You may download, modify, distribute, and use them royalty free for anything you like, even in commercial applications. Attribution is not required·RELATED QUESTIONI painted my bedroom a dark teal color and need some suggestions on color of bed set or accent colors?Turquoise or white would look great with teal
Where Can I Find Plastic Injection Molding Manufacturers in China?
Where Can I Find Plastic Injection Molding Manufacturers in China?
This article was originally published on the Sourcing Allies blog“What kind of materials can be used in plastic injection molding?”‍PLASTIC INJECTION MOLDINGWhat is the plastic injection molding process?This process is similar to that of metal die casting. In this process, molten plastic is injected into a die under pressure and held until it cools. Once it becomes solid, the die is opened and the plastic casting is taken out. Plastic injection molding is an extremely versatile, precise, fast and inexpensive method of mass producing plastic products.What materials can be used?This process mainly uses both thermoplastics and thermoset plastics, each of which have their own advantages and limitations. The primary difference between the two is that thermoplastics can be melted back into liquid form or recycled while thermoset plastics cannot.ThermoplasticsPros: Recyclable, cost efficient (because waste during manufacturing process can be reused), increased impact resistance because of flexibility.Cons: Lower heat and chemical resistance (they degrade faster.)ThermosetPros: Higher chemical and thermal resistance and higher mechanical strength and dimensional stability.Cons: Cannot be recycled, lower impact resistance. Also, thermoset plastics are more difficult to work with so you might find it difficult to find suppliers for them.What will I need in terms of design input?We must have 3D files in STEP or IGES formats.Where in China can you find plastic injection molding factories?Depending on what kind of plastic you want to use for your product, these suppliers can be found all around China. Different factories have different quality levels and expertise.How much does tooling cost?It can cost from a few thousand dollars for simple tooling to hundreds of thousands for more complex multi-cavity tools.How long does tooling last?It depends on the material, but most likely 200,000 pieces is not a problem.What is the average lead time for tooling?15 days to three months depending on complexity.Do plastic injection molding products or their tooling need any final finishes?It is not unusual for injected parts to need final machining. This may also include addition of inserts (that can also be inserted during casting) or threads cutting. Final surface finishes may also be needed such as powder coating or paint application. Sometimes, under some circumstances the tool itself may need a special surface texture added, which will imprint on the final injected parts.What are the pros and cons of plastic injection molding?Pros:Consistent measurements.Quick production rate.Low cost per unit.Good surface finish.Products can often be recyclable.Manufacturing process can be quite cheap because scrap can be recycled/reused.ConsTooling cost.Warpage and shrinkage.Some thermosetting plastics or rubbers cannot be recycled.Recycled material will not give as good performance as new material.What are the known challenges of the plastic injection molding process?Some suppliers will use recycled material without telling you. Material type used is critical if you are looking for specific physical properties or performance. Additionally, shrinkage can be problematic across larger surface areas.Sourcing Allies is a team of expert China sourcing agents that has helped western customers manufacture and source products from low-cost regions since 2006.For more on plastic injection molding visit our website or write to us at info@sourcingallies.com.·RELATED QUESTIONWhat are some good skin whitening masks?Skin color is not a determiner of someone’s beauty. Having white skin does not mean you are beautiful. On the other hand, you can be an attractive guy with brown or black skin.Let's come to your question. We can't change our skin color through whitening. But we can lighten our skin to increase the glow. There are so many reasons by which we lose our actual skin tone like sunburn, pollution, and chemicals used in cosmetics. Here are some of the Natural face masks that will help you return your actual complexion.1. Turmeric Mask2. Tomato Mask3. Lentil Scrub4. Kiwi Mask5. Potato Mask6. Changing Eating habits.These are the most effective lightening masks for the face. To know more detail about these face masks, I would suggest checking out this resource:Top 10 Face Masks for Skin Lightening.Thanks!.
How to Curl Your Hair Like This?
How to Curl Your Hair Like This?
how to curl your hair like this?To get curls like that you use a curling wand. Almost like an iron but without a clamp and it gets smaller at the bottom. To get bigger curls, you use a thicker wand. To get them not so tight and loose like the picture, you only hold your hair on the wand for 3-4 seconds (different depending on if your hair is fine, curly etc). But you can mess around and look up a tutorial on youtube (there's tons). Good luck!— — — — — —shouldnt blowdrying your hair make it dry?Yes, but it depends on what type of hair you have some people have oily hair but you can not really see the oil unless they blow dry or straighten it, and some people put hair lotions in there hair before the videos or its just left over hair lotions from past days. Other then that yes it does dry your hair blow drying it is not as worse as straightening your hair straightening your hair is cause lots of DAMAGE especially if you do not use heat protection hair sprays/lotions— — — — — —Is your hair long or short???my hair is:: long curly/wavy thick (too thick) natural blond, but i added a little shade hair down with a headband— — — — — —What is better for your hair?I would trim it first (your ends) and then use a flat iron because the blow drier is actaully more damaging because you go over the same spot a lot which is more damaging then one run with a flat iron— — — — — —is TRESemme bad for your hair?Umm, all shampoos are somewhat like a detergant. The trick is you need to put conditioner in your hair after yiu shampoo so you do not look like an afro puff coming out the shower. That's your problem. When you are rinsing out the conditioner, you need to use a brush and brush your hair at the same time while your rinsing the conditioner out. It also depends on your hair texture too and whether or not your hair can handle certain shampoos and conditioners— — — — — —Is dying your hair twice bad?death it to the black is bigger than going decrease back over it with blonde- so jointly because it could make your hair particularly comfortable, it wo not completely fry it or something. omit it after with some deep conditioning remedies— — — — — —How to get your hair grow?Nothing really makes your hair grow faster. On average, hair grows 1/2 per month, which is 6 inches per year— — — — — —what do you die your hair with?Great revelation huh?— — — — — —What REALLY helps your hair grow ?????I understand cutting your hair in anger, i have done it a number of times, and then cried about it for weeks. I take a vitamin that is called Biotin. It is s high-potency B-Vitamin. I had one of my hair stylists tell me about them, and they really do help. You probably wo not notice it much the first month seeing as how it must get into your system but back in the middle of January i had highlights put in my hair and by the end of feburary the roots had grown out an 1 1/2. No joke. So try them and see if they work for you. You can get them at any place that sell vitamins but i usually get mine from GNC, they might cost a little more but they are better for the buy. I would suggest at the least taking 2500 mcg a day. Good luck!.— — — — — —If you put gel in your hair everyday does it ruin your hair?Eventually it will, it is a chemical. I used to use gel and hairspray all the time and my hair was rough and nasty. I have not used any of that in a couple years and my hair is beautiful now— — — — — —How to deep condition your hair?Here is a simple organic inexpensive recipe I use: 1. Crack a raw egg into a small bowl. 2. Add 2 tbsp, of olive oil as well 3. Blend the two together with a fork for about 1 minute. 4. Massage treatment into your scalp and saturate your hair with the mixture. 5.Place a plastic shower cap on your hair for 15 minutes 6. Rinse in cool water thoroughly (Do not use Hot water) Deep conditioners add protein to repair your hair, Eggs are a rich source of protein that works well.
What Is Preventing the Solar Energy and Other Renewables to Replace the Oil?
What Is Preventing the Solar Energy and Other Renewables to Replace the Oil?
Solar energy and other renewables do not return the energy invested compared with fossil fuels. Fossil fuels are also portable-they have lots of energy and they can be transported. Not true of solar or wind, which are site specific and have to be part of an electrical grid. There's also the fact that the oil and coal still sitting underground is worth trillions to the oil companies, and the people who run those companies get rich from the status quo1. what is the most common and renewable energy sources?solar energy or w can use water as hydropowr2. Do solar energy panels for your home make sense?I looked into it once, just for the hell of it. I assumed the sun would shine 12 hours every day, which it does not in this part of the world.I assumed no maintenance cost. The pay-back was about 20 years.In all the companies I have worked for, if the pay-back on a project is over 4 years, it has no chance. The payback depends on the cost of electricity from the local supplier, the maintenance cost, the amount and intensity of sunlight and the installed cost of panels. This is all constantly changing. As the situation stands now, I would rather invest my money in lottery tickets or better still buy good stocks.3. What kind of fuel is the most used one for generating energy?We rely mainly on coal, nuclear, natural gas, hydroelectric, and petroleum power and a small amount from solar energy, tidal harnesses, wind generators, and geothermal sources. 80% of the world's energy consumption is in fossil fuels -- coal, oil and natural gas. Coal is still "king" right now at almost 50% of the US energy needs. Oil is a modest second. .4. How much do you know about solar energy?enough to know it's not the way to go for the future. I also know enough not to count wikipedia as a reliable resource. I firmly believe that nuclear is going to be the common source of power in the future.5. How is solar energy stored for later use?I have a solar panel system installed by a team called cotterill civils from birmingham, the midlands. If you need understand more about it, i would see there site as it has an informational6. Solar Energy | Save & Learn More with ChooseEnergy®The United States is on track to top 3 million solar PV installations this year, adding 1 million photovoltaic panels in just two years, according to a study by Wood Mackenzie Power & Renewables and the Solar Energy Industries Association. The number will exceed 4 million in 2023, the study says. It took more than 40 years for the first million installations. "The rapid growth in the solar industry has completely reshaped the energy conversation in this country," said Abigail Ross Hopper, SEIA president and CEO, in a press release announcing the study. The 2.7 million solar systems installed through September 2020 have the capacity to generate nearly 89 gigawatts of electricity. The solar industry employs about 250,000 Americans, the SEIA says. The expansion of solar is part of a growing movement toward renewable energy. Green energy made up 22.5 percent of all electricity generated in the country in 2020, according to the U.S. Energy Information Administration. Solar energy was responsible for about 14.7 percent of the green energy generated.7. can solar energy generate electricity in a home alone? what is needed?.?Adequate #of Solar Panels Adequate #of Storage Batteries Battery Charge Controller System load management Controller Mounting and wiring equipment Gas or Diesel Generator (Properly sized) I would figure on spending around $30,000-$40,000 for a decent system. This system will not give you air conditioning or heat, but will probably be adequate for a small homes other electrical, with some inconveniences at times. There are many companies offering these on the Internet. Some of them have forms and calculations for sizing all the equipment based on your location. You are not in a very good area because of a lot of rain, so diesel will need to run a lot. The most important thing in sizing system is to be accurate in listing ALL appliances electrical loads you have and how many hours/day they operate.
What Matches This Formal Dress?
What Matches This Formal Dress?
straight hair silver jewerly..and really try to find silver shoes because they would definatly look best..have fun!1. Great hairstyle for a teen girl with long straight hair?cornrows,twist,braids in the front up in ponytail,french braids,you can even cover the eye when it is out Im an hairstylist2. My hair is outrageously curly and frizzy, help!?Your hair texture changes as you age due to hormones. The stylists will recommend a keratin treatment - this contains formaldehyde, which is carcinogenic. Do not believe them if they say it is formaldehyde-free or chemical-free, or that XYZ brand is 'safe' - the process requires formaldehyde to set the keratin, and the heat changes some ingredients to formaldehyde gas. If the stylist needs a mask in order to put it on you, it's toxic. Some women have also had all their hair fall out from keratin treatments. Curly hair needs different techniques to straight hair to maintain - you are more than your hair, but working with your hair's natural texture is easier than working against it.3. what is better [natural] curly or straight hair?Curly. And I dispute most of the thing you said that you can not do with it. Sure, it's not the same as with the straight, but it's not impossible. As for myself, I have had bangs, and well, duh you can not brush it without frizzing, you are separating the individual strands. And I find it entertaining to try new hair styles and ways of pinning hair up, far more than just putting gel in. Sounds to me like learning more about curly hair would solve most of your problems with4. What's IN and what's OUT?Skinny headbands-IN :) Mascarra- in Lip Gloss- neither Black nailpolish- in Red nailpolish- out Messy bun- in High ponytail- in Juicy Couture sweatshirts- out Juicy Couture sweatpants- in UGG Australia boots- in but working its way out Coach sneakers- out The North Face sweatshirts- in True Religion Jeans- neither Abercrombie & Fitch- out Hollister Co.- in Aeropostale- in American Eagle- in Forever 21- in Lacoste- out Ralph Lauren- ehh kind of both Old Navy- in The Gap- out iPhone- out Skinny jeans- in Bootcut jeans- out Ripped jeans- in Open toed heals- in Pumps- in Betsy Johnson-out Lily Pulitzer-in Tommy Hilfigure-out Gossip Girl-in The Hills-out The City-out Britney Spears-in Lady Gaga-in Rihanna-in Chris Brown-OUTOUTOUT Jonas Brothers-in Miley Cyrus-in Demi Lovato-in Selena Gomez-in Disney Chanel-in Pearl earings-in Diamond earings-in Curly hair-in Straight hair-in Short hair-in Shoulder length hair-out Front bangs-in Side bangs-in Red lipstick-out Mini skirts-in Aviators-in Raybans-out Oversized sunglasses-neither Facebook-in Myspace-in5. What can i do with my straight hair?i have long straight dark brown hair i usually tease my hair to give it some volume to be cute and straiten it to make it extra straight. I also have clip in extensions that i use everyday just to make my hair less boring there purple and i put them on my bottom layer of hair, with my black under color. i hope i helped6. Is there any way to get straight hair permanently?No, there's no way whatsoever to permanently change your hair texture. All you can do it get long term treatments like chemical straightening. But even that grows out and your roots will be your natural texture.7. how do u curl shoulder length asian hair with a straightener?sorry ms kimchi how can you curl it with a straightener when you already have stick straight hair. Go buy a curling iron it's only $208. How to curl wiry thick and pin straight hair?Its the gene code. The dna strands tell your hair whether to be made curly or straight. It is genetics. Not "besides genetics", thats all there is9. What are cute hairstyles with NO HEAT? For straight hair?You can half of your hair up and half down. That's always cute10. my hair for the spring formal?Straight hair would look good with your dress just have some body in it do not wear it flat to your head and do not get zebra tips on your nails that does not go with that dress. TRUST ME..Get a french manicure or get your nails polished the same color as the dress
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