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The History of the Light Bulb More than 150 years ago, inventors began working on a bright idea that would have a dramatic impact on how we use energy in our homes and offices. This invention changed the way we design buildings, increased the length of the average workday and jumpstarted new businesses. It also led to new energy breakthroughs -- from power plants and electric transmission lines to home appliances and electric motors. Like all great inventions, the lamp globes can’t be credited to one inventor. It was a series of small improvements on the ideas of previous inventors that have led to the light bulbs we use in our homes today. INCANDESCENT BULBS LIGHT THE WAY Long before Thomas Edison patented -- first in 1879 and then a year later in 1880 -- and began commercializing his incandescent light bulb, British inventors were demonstrating that electric light was possible with the arc lamp. In 1835, the first constant electric light was demonstrated, and for the next 40 years, scientists around the world worked on the incandescent lamp, tinkering with the filament (the part of the bulb that produces light when heated by an electrical current) and the bulb’s atmosphere (whether air is vacuumed out of the bulb or it is filled with an inert gas to prevent the filament from oxidizing and burning out). These early bulbs had extremely short lifespans, were too expensive to produce or used too much energy. When Edison and his researchers at Menlo Park came onto the lighting scene, they focused on improving the filament -- first testing carbon, then platinum, before finally returning to a carbon filament. By October 1879, Edison’s team had produced a light bulb with a carbonized filament of uncoated cotton thread that could last for 14.5 hours. They continued to experiment with the filament until settling on one made from bamboo that gave Edison’s lamps a lifetime of up to 1,200 hours-- this filament became the standard for the Edison bulb for the next 10 years. Edison also made other improvements to the light bulb, including creating a better vacuum pump to fully remove the air from the bulb and developing the Edison screw (what is now the standard socket fittings for light bulbs). (Historical footnote: One can’t talk about the history of the light bulb without mentioning William Sawyer and Albon Man, who received a U.S. patent for the incandescent lamp, and Joseph Swan, who patented his light bulb in England. There was debate on whether Edison’s light bulb patents infringed on these other inventors’ patents. Eventually Edison’s U.S. lighting company merged with the Thomson-Houston Electric Company -- the company making incandescent bulbs under the Sawyer-Man patent -- to form General Electric, and Edison’s English lighting company merged with Joseph Swan’s company to form Ediswan in England.) What makes Edison’s contribution to electric lighting so extraordinary is that he didn’t stop with improving the bulb -- he developed a whole suite of inventions that made the use of light bulbs practical. Edison modeled his lighting technology on the existing gas lighting system. In 1882 with the Holborn Viaduct in London, he demonstrated that electricity could be distributed from a centrally located generator through a series of wires and tubes (also called conduits). Simultaneously, he focused on improving the generation of electricity, developing the first commercial power utility called the Pearl Street Station in lower Manhattan. And to track how much electricity each customer was using, Edison developed the first electric meter. While Edison was working on the whole lighting system, other inventors were continuing to make small advances, improving the filament manufacturing process and the efficiency of the bulb. The next big change in the incandescent bulb came with the invention of the tungsten filament by European inventorsin 1904. These new tungsten filament bulbs lasted longer and had a brighter light compared to the carbon filament bulbs. In 1913, Irving Langmuir figured out that placing an inert gas like nitrogen inside the bulb doubled its efficiency. Scientists continued to make improvements over the next 40 years that reduced the cost and increased the efficiency of the incandescent bulb. But by the 1950s, researchers still had only figured out how to convert about 10 percent of the energy the incandescent bulb used into light and began to focus their energy on other lighting solutions. The children's globe is a necessary teaching aid in the teaching of geography in primary and secondary schools. It is often used to explain the following: 1. the earth Understand the causes of the alternation of day and night and the change of seasons Analyze the impact of the movement of the earth on the climate 2. Distribution characteristics of latitude and longitude lines Shape direction length Know the role of graticule 3. The world's land and sea Understand the positional relationship between the seven continents and the four oceans and the latitude zone they are in Know the location of the six major sectors Recognize the topographic features of major terrain areas and major continents Find the position of the date line
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Orangutans Use Plant Extracts to Treat Pain Medicine is not exclusively a human invention. Many other animals, from insects to birds to nonhuman primates, have been known to self-medicate with plants and minerals for infections and other conditions. Behavioral ecologist Helen Morrogh-Bernard of the Borneo Nature Foundation has spent decades studying the island's orangutans and says she has now found evidence they use plants in a previously unseen medicinal way. During more than 20,000 hours of formal observation, Morrogh-Bernard and her colleagues watched 10 orangutans occasionally chew a particular plant (which is not part of their diet) into a foamy lather and then rub it into their fur. The apes spent up to 45 minutes at a time massaging the concoction onto their upper arms or legs. The researchers believe this behavior is the first known example of a nonhuman animal using a topical analgesic. Local people use the same plant—Dracaena cantleyi, an unremarkable-looking shrub with stalked leaves—to treat aches and pains. Morrogh-Bernard's co-authors at the Czech Academy of Sciences, Palacky University Olomouc and the Medical University of Vienna studied its chemistry. They added extracts from it to human cells that had been grown in a dish and had been artificially stimulated to produce cytokines, an immune system response that causes inflammation and discomfort. The plant extract reduced the production of several types of cytokines, the scientists reported in a study published last November in Scientific Reports. The results suggest that orangutans use the plant to reduce inflammation and treat pain, says Jacobus de Roode, a biologist at Emory University, who was not involved in the study. Such findings could help identify plants and chemicals that might be useful for human medications, de Roode says. In creatures such as insects, the ability to self-medicate is almost certainly innate; woolly bear caterpillars infected with parasitic flies seek out and eat plant substances that are toxic to the flies. But more complex animals may learn such tricks after an initial discovery by one member of their group. For example, an orangutan may have rubbed the plant on its skin to try to treat parasites and realized that it also had a pleasant pain-killing effect, says Michael Huffman, a primatologist at Kyoto University, who was not involved in the new research. That behavior may then have been passed on to other orangutans. Because this type of self-medication is seen only in south-central Borneo, Morrogh-Bernard says, it was probably learned locally. INTRODUCTION It wouldn’t come as a surprise to anyone that active pharmaceutical ingredients (APIs) come in a wide variety. Small molecule, large molecule, peptide, monoclonal antibody, innovative, generic; the list goes on. These molecules have the ability to cure or mitigate debilitating conditions that can change a person’s life forever. It makes sense, then, that these ingredients are of primary importance in a formulation, and appropriate measures should be taken to maintain their stability and efficacy. As these APIs become more complex, they also become increasingly vulnerable to a series of different degradation pathways. Changes in pH environments can cause acidification and lead to breakdown. Exposure to moisture can initiate hydrolysis and subsequently lead to the formation of secondary by products. Residual catalyst that isn’t removed from an excipient can trigger side reactions and perpetuate degradation of not just the API, but everything else in the formulation. To combat this, formulators will typically front-load their formulations to compensate for this anticipated loss. However, this does not end up being a practical solution, as the degradants are still forming, and becomes an even bigger concern when the cost of developing the formulation becomes even higher. As a result, the more practical solution is to ensure that the remaining ingredients in the formulation are of the highest quality and purity. This certifies the drug will not degrade, and that efficacy and longevity are maintained.
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Valves 101: Types of Ball Valves Ball valves are a type of piping equipment that shuts off or controls the flow in a pipeline by using a hollow sphere and round seats held in a valve body. There are two basic technologies for the design of ball valves, floating ball design and trunnion mounted ball design. The major components of a ball valve include: Valve body – A pressure vessel that contains the components needed to control or shut off the flow through a pipe. It is designed to connect two or more sections of pipe or tubing to each other. Ball – A sphere with a flow path (hole or tunnel) through the center of it and a connection point for a shaft to rotate it. Seats – Round donut-shaped discs that form a seal between the body and ball. Stem – A shaft that connects the internal ball to the outside of the valve to facilitate rotation of the ball. Packing – Flexible seals that fit around the shaft and prevent the media traveling through the valve from escaping externally. Bonnet – The part of the valve body that houses the stem and packing. Operator or Actuator – An external device designed to rotate the stem of the valve. This can be a lever, a gear, a motor-operated gear (electric actuator), or a pneumatic/hydraulic actuator. Floating Ball Design A floating ball valve sandwiches the hollow ball between two or more cupped seats that form a tight seal between the body and the ball at the inlet and outlet ports of the valve body. The ball is rotated (usually 90 degrees) by a shaft that protrudes outside of the valve body and is connected to some form of operator. For this reason, most ball valves are referred to as quarter-turn valves. This shaft is not rigidly attached to the ball in order for the ball to pivot on the end of the shaft as it rotates on the axis of the ball. This is usually accomplished with a slot on top of the ball, perpendicular to the ball’s flow path. The cupped portion of the seats cradle the ball prevents it from moving down in the valve body. The valve packing prevents the media from escaping the valve body through the stem opening in the bonnet. The most common type of packing today is chevron v-ring type packing. If you look at the cross section profile of this packing, it resembles the letter “V”. The outer diameter of the packing matches the bore of the bonnet. The inside diameter matches the outer diameter of the stem. Multiple rings of this packing are stacked on top of each other and the stem is inserted through the packing. A packing gland on top of the bonnet pushes down on the top of the “V” and causes the packing to expand and seals agains the stem and bonnet. Trunnion Mounted Ball Design The trunnion design ball valve works nearly the same way as the floating ball except the seats are spring loaded against the ball and the ball does not pivot. The ball only rotates on its axis in this design. In the trunnion mounted ball valve, the ball utilizes a second shaft and bearing on the bottom of the ball. This stem or “post” holds the bottom of the valve in place. The top of the ball is not slotted and the upper stem is rigidly attached to the ball. This prevents the ball from moving into the downstream seat. Since the ball does not move into the seats, the seats must move towards the ball. Springs behind the seat push them tightly into the ball in order to make the seal. Trunnion valves are very effective at sealing off very low pressures that would not be strong enough to move a floating ball into the downstream seat. They are also required on large diameter valves and high-pressure valves. The reason for this is the contact area of the seats in a floating ball is relatively small. From physics, we know force = Pressure x Area. The force on the downstream seat in a floating ball is derived from the process pressure in the upstream pipe pushing on the solid area of the ball in the closed position. If the pressure is high or the area is large, the downstream seat will be destroyed. The tradeoff is that trunnion valves are much more expensive than floating ball designs. Both floating ball and trunnion designs are available as multi-port valves by using elaborate flow paths in the ball and additional ports in the body. Are you looking for ball valves for your facility? Our team has years of experience in selecting the perfect valve for any application. Contact us today to discuss your specific valve needs!
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HOW TO STERILIZE GLASS DROPPER BOTTLES FOR DIY SKINCARE There comes a time in any DIYers life where you gotta sterilize a few glass bottles. Making your own skincare is a great way to reduce single-use packaging and customize your products. Alternatively, refillable skincare is getting more accessible each day- but you'll need to ensure all containers are safely sanitized before refilling! Our simple 5-step guide to sanitizing your glass dropper bottle will have you refilling with more confidence and less contamination! Our guide for how to clean the glass droppers (including the pesky pipettes!) can be found at the bottom of this blog post. STEP 1: CLEAN & SOAK Ensure your bottle is empty. Products containing oils (like oil-based serums) can't go down the drain and should be put into your trash. Once the bottle is empty, give it a quick rinse to flush out any residual product. To help release any labels and ensure the container is clean, soak overnight in soapy water. STEP 2: RINSE, REPEAT Remove your labels. Depending on how long you soaked your bottles, this may take some elbow grease! Spritz with 70% Isopropyl Alcohol to remove any stickiness. Once de-labelled, rinse twice with warm water to get the remaining soap out of the bottles. STEP 3: BOIL FOR TEN MINUTES Being careful not to burn yourself (glass containers will get very hot) use tongs to place your glass bottles in boiling water. Boil for ten minutes. After ten minutes, use tongs to remove your bottles. They will be extremely hot so simply set them on a surface to allow them to cool down before handling. STEP 4: RINSE IN 70% ISOPROPYL ALCOHOL Once your glass bottles have cooled completely, rinse in 70% isopropyl alcohol. Submerge the glass bottles completely to sanitize. If you’re confident you can clean the whole inside surface of the bottle, pour just enough isopropyl alcohol into each bottle to clean. Simply swish and empty! STEP 5: AIR DRY Lay fresh paper towel down on a clean surface. Position each bottle upside down on the paper towel to let it drip dry. You’ll need to wait until the bottles have air dried completely before refilling. It's important to wait for all alcohol and and any residual water to completely evaporate before you refill or reuse. The best bet is to not be in a hurry and leave them to dry overnight, or for 24 hrs. Glass Bottle Creating glass containers can be accomplished by one of two different processes – the Blow and Blow, or the Press and Blow process. Each process is chosen based on the kind of glass bottle being made. All glass bottles start out as raw materials. Silica (sand), soda ash, limestone, and cullet (furnace-ready, recycled glass) are combined into a specific mixture based on the desired properties of the bottle. The mixture is then melted at high temperatures in the furnace until it becomes a molten material, ready for formation. The type of glass this mixture will produce is known as soda-lime glass, the most popular glass for food and beverages.
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Everything You Need To Know About LED Lighting LED lighting is fast becoming the best solution for a wide variety of outdoor lighting applications. The reasons are simple: LEDs are the most energy efficient light on the market by far, they have the longest lifespan (and associated product warranties) by 2-10 times over the nearest competing technology, and they produce a very high quality light with a wide range of characteristics. They are small, steady-state lights which means they don’t present the breaking or recycling issues common with legacy lighting technology. Perhaps the only downside is that they’re not the cheapest light on the market. That said, the price continues to come down and a smart investor will recognize right away that a lifespan that could be an order of magnitude (10 times) longer than a traditional bulb is easily worth the investment. You get what you pay for after all. One of the most important facilities for high quality outdoor LED light are outdoor parking lots. Parking lots present three major obstacles for owners, real estate organizations and facility managers. First, your parking lot needs to be well illuminated to present a welcoming and safe atmosphere for tenants and customers. The type and specifications of the lighting used in your parking lot typically sets the tone regarding safety and professionalism for the building at large. We refer to this general characteristic as lighting quality. Second, your parking lot lights need to be as energy efficient as possible because they typically operate from dusk to dawn. Third, maximizing luminaire lifespan is important because hiring labor and/or keeping staff on board to routinely change bulbs can become very costly. Primarily for these three reasons it is important to install the best combination of high efficiency, long lifespan, and high quality when choosing a lighting solution. Indoor LED lamp is the 21st century answer to all three problems. Lighting Quality: The most noticeable difference between traditional parking lot lights like High Pressure Sodium and modern day LEDs is the color temperature. Notice the incredibly yellow tinge in the “Before” images to the left below. In the same yellow image take a look at the grass. The characteristic green color is almost indistinguishable. Compare that to the same parking lot when it is illuminated by LEDs. The first thing that stands out is all of the green. The trees and grass appear almost exactly like they do during the day. That is a much more welcoming and comforting experience for tenants, customers, and/or employees frequenting the lot. Using LED Upgrades for Street Lights Switching to LED lighting leads to significant cost reductions and carbon savings for cities and municipalities. When 12 major cities adopted LED street light, they saw energy savings of 50 to 70 percent. In New York City, the city decided to replace 250,000 street lights with LED lights. Known as the largest project of this type in the United States, these new lights helped the city save $14 million in maintenance and energy costs between 2015 and 2017. By 2025, there are expected to be 350 million street lights around the world. Unlike other efficiency projects, LED lights are easy to implement. If the entire United States used LED bulbs for street lights, the country would save $6 billion. The carbon savings would be similar to removing 8.5 million vehicles from American streets. In Los Angeles, the installation of 140,000 LED street lights in 2013 led to energy savings of 80 percent. What are Flood Lights? LED flood light is great lighting fixtures that emit a broad beam of light. As the name suggests, flood lights are used to flood an area with light. It is the best way to provide an enormous amount of non-natural light to an area. LED floodlights are highly energy efficient and have a higher lumen per watt output than any other conventional lighting system. They are used for many purposes and also allow a range of lighting techniques.
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Those Anti-Covid Plastic Barriers Probably Don’t Help and May Make Things Worse Covid precautions have turned many parts of our world into a giant salad bar, with plastic barriers separating sales clerks from shoppers, dividing customers at nail salons and shielding students from their classmates. Intuition tells us a plastic shield would be protective against germs. But scientists who study aerosols, air flow and ventilation say that much of the time, the barriers don’t help and probably give people a false sense of security. And sometimes the barriers can make things worse. Research suggests that in some instances, a barrier protecting a clerk behind a checkout counter may redirect the germs to another worker or customer. Rows of clear plastic shields, like those you might find in a nail salon or classroom, can also impede normal air flow and ventilation. Under normal conditions in stores, classrooms and offices, exhaled breath particles disperse, carried by air currents and, depending on the ventilation system, are replaced by fresh air roughly every 15 to 30 minutes. But erecting plastic barriers can change air flow in a room, disrupt normal ventilation and create “dead zones,” where viral aerosol particles can build up and become highly concentrated. “If you have a forest of barriers in a classroom, it’s going to interfere with proper ventilation of that room,” said Linsey Marr, professor of civil and environmental engineering at Virginia Tech and one of the world’s leading experts on viral transmission. “Everybody’s aerosols are going to be trapped and stuck there and building up, and they will end up spreading beyond your own desk.” There are some situations in which the clear shields might be protective, but it depends on a number of variables. The barriers can stop big droplets ejected during coughs and sneezes from splattering on others, which is why buffets and salad bars often are equipped with transparent sneeze guard above the food. But Covid-19 spreads largely through unseen aerosol particles. While there isn’t much real-world research on the impact of transparent barriers and the risk of disease, scientists in the United States and Britain have begun to study the issue, and the findings are not reassuring. Three Types of Acrylic Sheet There are three main ways plexiglass is manufactured. Each style of plexiglass acrylic has its own advantages and disadvantages. This article will outline the differences. Cell Cast Acrylic Sheet This style is produced by melted liquid PMMA resin poured between two plates of glass Least amount of expansion and contraction Highest margin of error on thickness tolerance Standard thickness tolerance from .118” - .500” is +/- 8% This is the best material to use when cutting or routing Highest molecular weight Widest range of colors available Standard material for signs, aquariums, and high-end fabrication Continuous Cast Acrylic Sheets This style is produced by pouring melted liquid PMMA resin between two belts of polished stainless steel Best material consistency Least amount of expansion and contraction 2nd best thickness tolerance Widest ranges of sizes available up to 9’ wide and 16’ long Standard material for forming, fabrication, and skylights Extruded Acrylic Sheets Semi-soft melted resin is pushed between rollers and cut to size Highest internal stress within the sheet Most expansion and contraction Generally, the best thickness consistency Thickness tolerance +/- 10% Softest sheet Gums up routers more when cutting Easy to glue Standard material for displays, and replacement windows. Some signage acrylic sheet uses.
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Recently my website faced a difficulty in loading fast or sometimes long time to respond. It probably caused by the DDoS attack that made server busy. Can you tell me how to prevent this DDos attack?
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How Modern Kitchen Appliances are affecting our lives? We are living in an era where everything is getting smarter. From gadgets to kitchen appliance, everything has become smarter. Now you no longer need to depend on just a single stove and make a lot of effort throughout the day to make your food. Now you can cook your food within a short duration using all the smart appliances available in your kitchen. Some of the appliances that are preferred by people these days to have healthy dieting are given below: Air fryer For all those health-conscious people who love food but fear eating fried food can now eat without even worrying about the oily food. With the help of the air fryer, one can fry food without using oil, butter or ghee. Today, most of the people have health issues like diabetes, cholesterol, etc, that is why people prefer healthy food only to have a healthy diet. Air fryers are making their lives easy by giving them a chance to eat everything without even worrying about the amount of oil used in them. Roti Maker Ever since the arrival of Roti makers in the market, people, especially women are happy. Rotis are what everyone hates to make as they are so time-consuming and needs a lot of perfection. For this, the invention of Rotimatic has made everything so convenient. Rotimatic is also very helpful to save our time. As per the Rotimatic Reviews, it is giving our consumers the best services from kneading dough to cooking and puffing a roti. All you need to do is fill the required ingredients in the machine and it will do everything else on its own.
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Why the length of the day and night are not equal sometimes? Especially during the winter and spring?
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It's a wonderful question, Fantasy Sports Apps and Business is a Hot topic. Looking budding entrepreneurs are interested to start fantasy sports businesses to make money in this way. One cause why your sports business needs an App is to improve direct communication with clients and customers. With access to a wealth of information at just a touch of a button, business sports mobile application development has opened the door to clear and direct interaction between customers and businesses. Are you looking for Developing a mobile app for a fantasy sports business? Fantasy Sports Tech provides fantasy sports software solutions like cricket, football, baseball, basketball, soccer, and Rugby. They offer valuable marketing opportunities and help you reach your target audience, as well as many other advantages that will help put you ahead of your competition. If you are interested to share your ideas. Don't be hesitate. Anytime we assist to clear all your doubts.
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Can anyone point me the best online website to learn Phyton programming for free?
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What is the reason why Google WMT shows "Indexing request rejected" for my blog URL?"
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Can anyone explain me what is the difference between shared, VPS and dedicated ?
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What is the best programming language for robotic development? In which language robots are programmed?
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Last year, I started a blog website and start writing articles on it. Since I started, I'm unable to get enough readers and can't drive a traffic too. What is the best way to drive a real traffic to websites?
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What is CSS in Web Development?
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What does it mean EMTP simulation in power engineering?
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What is the largest and most developed city in Africa?
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Fantasy Sports is one of the well-known sectors. There are tons of fantasy sports development companies in the market. Does anyone answer me with what technologies are involved in developing a Fantasy Sports App?
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I'm seeing that my SSH port says 22. What are the common common network ports in networking and for what they are used?
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How many people have died from COVID-19 (Coronavirus) in the world so far?
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What is JSON in PHP?
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what is the diffrence between PHP Include, PHP include_once, PHP require and PHP require_once?
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Can anyone tell me what is the most powerful search engine in the world?
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What is #noMore revolution in Ethiopia or Africa?
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Is ExpressAfrica a best African Social Media? Ever?
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Is Ethiopia the only country that has never been colonized?
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Since I started learning physics two years ago, I can differentiate the difference of velocity and gravity since both have unit of m/s2. What is the difference between acceleration and gravity?
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How to prevent diabets
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Can Anyone Help Me How To Embed Youtube Subscribe Button To Your Website?
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