Since 1958, scientist Charles Keeling and others have measured the amount of carbon dioxide in Hawaii's atmosphere. Carbon dioxide levels in our atmosphere have thus risen about 40% since the start of the Industrial Revolution, which is raising global temperature. Before industrial activity, there was around 270 ppm in the atmosphere. Today it has a concentration of over 400 ppm (parts per million) in the atmosphere. However, an increase in CO 2 concentrations in our atmosphere is causing average global temperatures to rise, disrupting other aspects of Earth's climate.Ĭarbon dioxide is the fourth most abundant component of dry air. Without it, our planet would be inhospitably cold. A molecule of carbon dioxide (CO 2) is made up of one carbon atom and two oxygen atoms.Ĭarbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. In the colored models, carbon is light gray and oxygen is red.Ĭarbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. It is not flammable.Four representations chemists use for carbon dioxide. It can cause unconsciousness at high concentration. Health effects / safety hazards: Carbon dioxide inhalation can cause headache and increase of the respiration rate. It is present in sodas and soda water and dry ice. It is used as a food additive and also as a propellant. Other products are the carbonate salts as sodium carbonate and bicarbonate (baking soda). Some of these products are the urea, used as fertilizer and the solvent and chemical precursor methanol. Uses: Carbon dioxide is used in the productions of other most valuable products in the chemical industry. When the carbon dioxide is in contact with water, it forms carbonic acid, which could decrease the pH of water, causing a problem for aquatic life. Even when the solubility is low, this factor is very important for the water bodies in the planet. Carbon dioxide solubility in water is 1.45 g/L, and it is insoluble in ethanol and organic solvents.Ĭhemical properties: One of the most important reactions for the environment is the solubility of carbon dioxide in water. Carbon dioxide melting point is -56.6 ☌ and above this temperature, it sublimates. When concentrate, it can have a acidic odour. Physical properties: Carbon dioxide is a colourless and odourless gas. In a unnatural way, carbon dioxide can be produced from the combustion of fuels as methane, gasoline, kerosene, propane, minerals, rocks and coal. The carbon dioxide produced is used for the plants during the photosynthesis in a reverse process that produces oxygen. In the natural way, the carbon dioxide is produced during the respiration of organisms (plants, animals, fungi, bacteria):Ĭ 6H 12O 6 (s) + 6 O 2 (g) → 6 CO 2 (g) + 6 H 2O (l) + heat Preparation: Carbon dioxide is produced by the natural and unnatural ways. Carbon dioxide is found in the atmosphere and is also emitted by volcanoes, natural gas, crude oil and hot springs. All forms of live need respiration to survive, in this process the organisms inhale or capture oxygen from the environment and through different biochemical reactions it is produced CO 2 and water. It is the product of the respiration process. Occurrence: Carbon dioxide is largely found in nature. Its chemical structure can be written as below, in the common representations used for organic molecules. The two anions are bound to the carbon cation trough double bonds (pi bonds) making the carbon dioxide as a linear and rigid molecular. The molecule is formed by one carbon cation C 4+ and two oxygen anions O 2. Formula and structure: The carbon dioxide chemical formula is CO 2.
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The name "Charlieplexing", however, first occurred in a 2003 application note. The Charlieplexing technique was introduced by Maxim Integrated in 2001 as a reduced pin-count LED multiplexing scheme in their MAX6951 LED display driver. Multiplexing can generally be seen by a strobing effect and skewing if the eye's focal point is moved past the display rapidly. Other issues include duty cycle, current requirements and the forward voltages of the LEDs, but these issues also affect standard x/y multiplexing.Īs with any multiplexing, there is a requirement to cycle through the in-use LEDs rapidly so that the persistence of the human eye perceives the display to be lit as a whole. This shows a six I/O Charlieplexed array that is scalable to any size without difficulty. However, there is no problem if a diagonal array is used (see diagram). The method uses the tri-state logic capabilities of microcontrollers in order to gain efficiency over traditional multiplexing.Īlthough it is more efficient in its use of I/O, there are issues that cause it to be more complicated to design, and render it difficult for larger displays when trying to fit Charlieplexing into a standard x/y array - as described later in this article. When functioning as an LED display or mechanical keypad, the use of reversed pairs of LEDs or standard diodes at the intersections doubles the 8 input matrix size from 28 to 56. The diagram shows that eight inputs creates 16 intersections when used in an x/y array, but 28 intersections when used in a Charlieplexed array. to drive an array of LEDs.Ĭharlieplexing can be used in displays and resistive or projected capacitance keypads and touchscreens, using a simple array (shown). A Charlieplexed digital clock which controls 90 LEDs with 10 pins of a PIC16C54 microcontroller.Ĭharlieplexing (also known as tristate multiplexing, reduced pin-count LED multiplexing, complementary LED drive and crossplexing) is a technique for driving a multiplexed display, keypad or touchscreen, in which relatively few I/O pins on a microcontroller are used e.g. The Lakers shot just 45.2% from the field and 31.3% on 3-pointers. Just three teams have forced a Game 7 after losing the first three games, and the Portland Trail Blazers in 2003 against Dallas were the last team to do it.Īnthony Davis led Los Angeles with 28 points and 18 rebounds, and LeBron James had 23 points, 12 assists and seven rebounds. The Lakers’ season is on the line, knowing that no team in NBA history has come back from a 3-0 deficit to win a best-of-seven series. Porter had 14 points, 10 rebounds and six assists, Caldwell-Pope had 17 points and Brown added 15 points, five rebounds and five assists off the bench. Octo11:51 am ET The winless Los Angeles Lakers (0-3) are on the road Wednesday to face the Denver Nuggets (2-2). Game 3 accident: Referee Scott Foster bloodied in accidental collision with Lakers' LeBron James What makes the Joker so good?: Denver's Nikola Jokic is an amalgamation of Hall of Famers Jokic played with foul trouble and didn’t generate another triple-double like he did in the first two games of the series but he had 24 points, eight assists and six rebounds, including 15 points in the fourth quarter. As the Lakers tightened their defense on two-time Nuggets MVP center Nikola Jokic, Murray has found room to operate offensively.ĭenver dominated the fourth quarter, outscoring the Lakers 35-26, and received timely made shots from Jokic, Kentavious Caldwell-Pope, Bruce Brown and Michael Porter Jr. The Lakers, after losing 119-108 to the Nuggets on Saturday at Arena, are the latest team to get a shot at history. 2 days ago &0183 &32 'All I got to say is MILE HIGH BABY' Jeff Green gets the fans going as he celebrates Denvers first championship bRINGItIn Watch on NBA TV and the NBA App. The Nuggets compete in the National Basketball Association (NBA) as a. Murray scored 17 points in the first quarter after scoring 23 in the fourth Thursday and finished with a game-high 37 points, seven rebounds and six assists. The Denver Nuggets are an American professional basketball team based in Denver. Jamal Murray resumed Game 3 where he finished Game 2 - scoring points. Just as with mathematical functions, Java methods can be composed. The easiest way to find documentation for Java classes is to do a web search for “Java” and the name of the class. Take a minute to read the documentation for these and other methods in the Math class. The result is 63 (rounded up from 62.8319). More specifically, an int uses 32 bits the largest value it can hold is 2 31−1, which is about 2 billion.Ī long uses 64 bits, so the largest value is 2 63−1, which is about 9 quintillion. double radians = Math.toRadians(180.0) ĭouble degrees = Math.toDegrees(Math.PI) Īnother useful method is round, which rounds a floating-point value to the nearest integer and returns a long. The same is true for the constant Math.E, which approximates Euler’s number.Ĭonverting to and from radians is a common operation, so the Math class provides methods that do it for you. To convert from degrees to radians, you can divide by 180 and multiply by π.Ĭonveniently, the Math class provides a constant double named PI that contains an approximation of π: double degrees = 90 ĭouble angle = degrees / 180.0 * Math.PI Īlso, PI is the name of a variable, not a method, so it doesn’t have parentheses. The third line finds the sine of 1.5 (the value of angle).Īrguments of the trigonometric functions – sin, cos, and tan – should be in radians. The first line sets root to the square root of 17. You can use, or invoke, Math methods like this: double root = Math.sqrt(17.0) Math is in the java.lang package, so you don’t have to import it. The Java library includes a Math class that provides common mathematical operations. This process can be applied repeatedly to evaluate more complex expressions like log(1/sin(π/2)).įirst we evaluate the argument of the innermost function, then evaluate the function itself, and so on. Then you can evaluate the function itself, maybe by punching it into a calculator. In mathematics, you have probably seen functions like sin and log, and you have learned to evaluate expressions like sin(π/2) and log(1/ x).įirst, you evaluate the expression in parentheses, which is called the argument of the function. We’ll also present the Math class, which provides methods for common mathematical operations. In this chapter, we’ll show you how to organize longer programs into multiple methods and classes. So far we’ve only written short programs that have a single class and a single method ( main). Xcode for Windows: On a PC? Don’t let that stop you. 7 Day App Action Plan: Plan out your app and finally get started turning your app idea into reality.The Complete Swift Tutorial for Beginners: Learn Swift programming with my Swift guide designed with the beginner in mind.The 10 Step Process To Make An App: Learn the iOS app development process with this step by step guide.Get my handy Xcode cheatsheet with all the keyboard shortcuts that I use!.Ready to get your hands dirty in Xcode and build something? Want to learn Swift programming too? In this Xcode tutorial, you’ve learned about the various parts of the IDE and how to use Xcode for writing code and building user interfaces. If you chose Storyboards as your UI building option when you created the Xcode project, then your project will have a file called Main.Storyboard.Ĭlick this file and the Editor Area will change to the visual UI designer known as Interface Builder. How to use Storyboards and Interface Builder In this Xcode tutorial however, I’ll show you how to work with both options inside the Xcode Editor Area. I’ve written a SwiftUI tutorial so check that out if you want to move forward with that! However, since Apple is moving forward with SwiftUI, it’s a better investment for the future but at the present moment, you’ll be limited with the amount of help and educational content you can find on it. Most of my tutorials are based on Storyboards because it was the easiest way for beginners to grasp. Should you use Storyboards or SwiftUI?Īs a beginner, most of the tutorials you’ll find on the internet right now will based around Storyboards and UIKit since SwiftUI was just released. Xcode 11 has a special Preview Canvas pane that shows your user interface change in real time as you write the code to modify your user interface. SwiftUI was released in late September 2019 as a new way to build user interfaces by writing code. From sleek, rectangular chrome pulls to ornate, antique brass knobs, there’s no shortage of options. Both options allow you to choose from a wide array of finishes and styles. Many people opt for knobs for their cabinets and pulls for their drawers, for example.Ĭhoosing between pull hardware and knobs is just the first step. Keep in mind that you don’t have to choose between knobs and pulls for your entire kitchen. Because pulls tend to be larger, they are generally a bit more expensive than knobs. Square, metal pulls pair well with modern, contemporary kitchens with flat-panel cabinets, while other styles of pulls can look great in traditional, farmhouse, mediterranean, or old-world style kitchens. They allow you to grasp the hardware with your entire hand, rather than just your fingertips, and are generally more comfortable to operate. Pulls are a great choice for larger, heavier drawers. When choosing knobs, keep in mind that round ones will never look crooked, while square knobs (and other shapes) can look off-kilter if the screw rotates over time. However, they’re not as sturdy, since they typically rely on a single screw. Knobs are easy to install and tend to be a bit cheaper than pulls. Or opt for decorative, ornate ones to create a more extravagant, luxury feel. For a classic, minimalist look, choose simple round or square metal knobs. When it comes to knobs, the options are nearly endless. You’ll also want to consider the design of your cabinets and other elements in your kitchen to choose hardware that complements your other finishings. Both styles have their pros and cons, and the right one for you really comes down to personal preference. Kitchen hardware comes in all shapes and sizes, but most fall into one of two main categories: knobs or pulls. Today, we’ll look at the different types of kitchen hardware, and then talk about how to choose the perfect hardware for you and your kitchen. Understanding all your options is the first step. But the right hardware can truly bring your space to life and serve as the perfect finishing touch.Ĭhoosing the right hardware is not always easy, especially since there are so many styles, colors, and finishes to pick from. Spend over £25 online for free delivery or click and collect from your closest branch.Kitchen cabinet hardware may seem like a small detail in the grand scheme of things, especially if you’re remodeling your entire kitchen or even your entire home. Other designs available include chest, pull, square and twist cabinet handles. Alternatively, find bar cabinet handles with enclosed and open ends, in matte stainless steel, polished chrome, brushed nickel and more. View bow cabinet handles such as the classic bow handle in polished chrome and the flat chunky bow handle in chrome and stainless steel.īrass cabinet handles match perfectly with traditional cabinets, and we stock a Victorian brass bow cabinet handle in 152mm. Similar to a D handle, the bow cabinet handle is curved and has a more modern aesthetic. We stock kitchen cabinet handles, D, bow and bar cabinet handles, and many more decorative or functional handles with a variety of finishes available.įind the popular D cabinet handle with its classic D shape for an easy grab and pull motion, such as the D handle in a brushed stainless-steel finish, supplied with fixing screws or the bowed D handle for a more rigid design. View a wide selection of cabinet hardware to suit all types of kitchen cabinets and drawers at Toolstation. This is not a pleasant sound, and more than once I’ve been scared out of my skin when I’ve surprised a raccoon during an evening walk or fishing trip.īut that twittering shriek is nothing compared to the sound of a full-on raccoon fight. Sometimes, you’re the one who inadvertently alarms them, resulting in a shriek that has been likened to a high-pitched pig squeal. But they actually make an array of sounds, particularly when agitated or alarmed. They don’t call out across the night like many animals on this list. Most people don’t think of raccoons as particularly vocal animals. They’re now one of the most wildly distributed carnivores on Earth. Read more about red foxes and their wily ways. In fact, it’s so sensible that the Maryland Department of Natural Resources regularly posts stories on Facebook assuring people that the screams, cries and shrieks they hear are red foxes, not people being assaulted in their backyards. Which, I assured her, locking herself in a room, and calling the police was a completely understandable and sensible reaction to one’s first encounter with red fox screams shattering the night. I ended up sending her a link to a YouTube video of the scream to convince her to come out of the room where she’d locked herself in with her kindergartner. “That’s a fox? That’s not a fox! Are you sure that’s a fox?” Clearly audible through the phone and from the woods between our yards. “A woman’s being stabbed in our woods! I’m calling the police!” As I remember, the late-night call with my new-to-Maryland neighbor went something like this: “Do you hear a woman screaming?” she sounded breathless and a little frantic. I usually have to set aside so much time. It passes easily, and it’s so fast to shave. THE REVIEW: "This is the best razor I’ve ever used,” writes one tester. Waterproof? Yes* (but can be difficult to use in shower).Attachments: Set of five extra blades, silicone cap.Make sure to use short strokes and go slow to avoid any nicks or cuts. Instead, I get my skin soft in the shower, then dry off, load up on shaving cream, and then run the razor along my bikini line, lines, underarms-wherever. This gives an ultra-close shave, which is great to use once a month, then follow up with my electric bikini trimmer every week to keep my skin silky and hair free.īut FYI: I don’t recommend trying this in the shower, as it can be a little too slippery and lead to cuts and missed spots. How, you ask? Well, it uses one single, super-sharp blade-instead of a row of three or five like most razors-which creates less friction against your skin that can lead to irritation and missed spots. Like, my partner said my skin felt as smooth as a dolphin. Our top picks for bikini trimmers in 2023:īold statement incoming: This single-blade razor gives me the softest skin of my life. ✔️ FYI: We updated this article in June 2023 to give you the most up-to-date info on bikini trimmers, including tried-and-tested tools going viral on Reddit, a dermatologist’s take on trimming at home, and how to choose the best bikini trimmer yourself. So, I rounded up all the best bikini trimmers (21 of ‘em, to be exact) depending on your skin type and needs, including some much-needed advice from dermatologist Mona Gohara, MD, and product researcher scientist Katelyn Liston on how to trim your bikini line and how to choose the best bikini trimmer. And I learned: Bikini trimmers are surprisingly effective, way more affordable, and far less irritating for my sensitive skin.īut because I’ve tested so many over the last year, I know some are better than others depending on what you’re going for (my in-shower bikini trimmer vs my travel bikini trimmer vs my precise bikini trimmer-they’re all just slightly better for the specific job I need them to do). Which is when I finally gave into the hype of at-home hair removal products and tried a bikini trimmer (or, let’s be real, a few dozen). But it got expensive af (think: $100 a month, plus tip) and never lined up with my plans. After years of razor burn and ingrown hairs from shaving, waxing off the hair on my bikini line felt like the only way to get smooth, itch-free skin. I used to be extremely loyal to my monthly Brazilian wax. Last 4 Digits of Social Security Number (SSN) Log onto the Student and Faculty Portal by going to my. To recover your username and password, follow the steps below: Complete the following fields on the Change Password screen:.Click Change Password under Account Settings.Log onto the Student and Faculty Portal by going to:my.To change your password, perform the following: Then, click on “Login” to access your dashboard.To access the University of Phoenix student login dashboard Here’s how to access the university of phoenix login portal How to order university of phoenix transcript.How to forward outlook web app (OWA) email to your personal email.How to set up university of phoenix email for iPhone.How to change your personal info in MyPhoenix.There was nothing special to recommend it, except that I could get my education on my time." << First < Prev. Overall, this was a positive experience, but not a particularly outstanding one. I think if I had wanted to interact more, I easily could have, and would have had a good response. I didn't interact with the other people in the class too much by choice, but when I did, it was a positive experience- people were responsive and easy to get in touch with. The coursework was pretty similar to the classes I had at the local college, just more convenient.I used the internet a lot, to write papers and do research, as well as to watch professor lectures on occasion, and email and instant messaging to chat with a professor and with classmates when there was a group assignment. With University of Phoenix, there is more flexibility, so I can learn when I want, but it is considerably more expensive. I had taken a few classes at a local college, but the timing was terrible- it was hard to squeeze in class time between all of the other responsibilities I have. All-in-all, I found the experience extremely rewarding, flexible and fulfilling" Many of my professors were surprisingly (to me) willing to make themselves available in the evenings and even over weekends. Some classmates were fantastic with setting up project work timelines and subgroups for collective brainstorming. Not being able to meet face-to-face gave me apprehensive feelings initially but that was quickly overcome once we got into the "meat" of the work. Online learning tools included video, webcasts, communication tools (chat, discussions, blog & email) and some graphics tools.I felt that the interaction amongst my classmates and professors (overall) was outstanding. I really felt strongly about persuing an e-Business degree (based on the exploding range of e-business opportunities) and believe my degree will aid myself and 2 business partners significantly.I found the Internet course especially fascinating as the coursework gave me the feeling of an "insider" who got to look "behind the curtain" of the web's inner-workings. Some of my favorite courses were E Business Management I'II, E-Business Cases and The Internet: Concepts and Application. I checked with others who had previously gone through the program and asked a lot of questions up front.The coursework was demanding, as I suppose any degreed program would be, but I was not overwhelmed. Overall, I felt the online experience to be very rewarding. "I attended the University of Phoenix online degree program, finishing up last Spring (2007) I earned a Bachelor of Science in Business/e-Business. They need to be self-reliant, self-motivated and prepared to meet the inevitable frustration of technology mishaps." A certain type of learner will have success in an online environment. The worst instructors are so mainly due to lack of communication. Many are quite knowledgeable, resourceful and communicative. In most cases it is a roll of the dice to see what kind of instructor will be available for your scheduled course. The university sets up class schedules in a way that students may take classes with the same people and allows for successful teams to partner together repeatedly. Half of these papers will be in a Learning Team setting.The Learning Teams can be incredibly rewarding or immediately frustrating, depending on the individuals on your team. In a typical six week course, a student can expect to write up to eight or nine papers. Class work revolves mainly around discussion and contribution, but even more so on researching and writing papers. Each student has their own private page with links to every necessary location they would need during their time with the college – technical support, financial aid, graduation application and so forth. A natural discussion tends to develop as the entire class has the opportunity to contribute thoughts and ideas.The textbooks and other required readings are available on a student Web site. 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