Category: Engineering

The Number of Gifts Santa Claus and the Elves Must Build and Deliver Each Christmas Eve

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Assuming Santa Claus delivers at least 1 gift to each child worldwide, this would equate to 2,100,000,000 (2.1 billion) gifts. With an average of 2.5 children per household worldwide, Claus would have to visit 840,000,000 (840 million) homes to accomplish this task. To finish this job in 24 hours (12 for each side of the world), Claus would need to visit 35,000,000 (35 million) homes per hour which would be 580,000 per minute, or nearly 10,000 every second! Because there are so many homes and so very many children, the elves of the North Pole face an equally grueling pace. Assuming each child receives 1 toy, and the build time is spread across 364 days, these elves would need to craft approximately 5,750,000 (5.75 million) toys per day. This would mean 240,000 toys per hour, 4,000 per minute, or nearly 70 every second without a work break for any of them. If the North Pole were to employ 100 elves, each would need to make 0.7 toys per second; and with a large company of 1000 elves, this value drops to 1 toy every 14 seconds which is more manageable; however with a massive company of 10,000 elves, each would only need to craft 1 toy every 2.5 minutes which would be much more probable for a workforce to achieve; if however the North Pole were capable of managing a city sized work force of 100,000 elves, each elf would need only to craft a single toy every 24 minutes which is a pace that a human powered North Pole, theoretically could handle. With that being said, mythologically speaking elves are immortal, or at the very least ageless, and they do possess arcane magic and clandestine knowledge which must be kept in mind when calculating what is theoretically possible

The Reason WD-40 Was Developed

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The WD-40 formula was developed by 3 scientists who succeeded in their goal upon the 40th design attempt, with the name WD-40 being an acronym meaning “Water Displacement: 40th Formula”. WD-40 was created in 1953 by the Rocket Chemical Company located in San Diego, United States of America. The formula was originally researched and developed as a means to protect the outer skin and thin tanks (e.g. lightweight pressurized tanks which provide structural support when filled saving weight overall) of SM-65 Atlas intercontinental ballistic missiles from rust and corrosion during the manufacturing, handling, and storage process(es) of missile silos. This proprietary mixture resolved for the aerospace industry the need for a dependable water displacing solvent which prevented moisture and other related damage. Early use of WD-40 upon Atlas SM-65 missiles demonstrated the solutions superior effectiveness in comparison to analogs. This prompted a handful of employees to take canisters of WD-40 home which inadvertently inspired the projects founder, Norm Larsen, to package WD-40 in an aerosol form designed specifically for consumer use. WD-40 first appeared on store shelves in 1958 and developed applications in spacecraft maintenance, disaster recovery, and countless home and industrial tasks (eg. lubricating stuck hinges of seized doors, displacing moisture upon electrical contacts, loosening rusted and/or seized bolts etc.)

The Status Symbol of Keys Within the Ancient Roman Empire

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Metal keys first appeared during the Ancient Roman Empire and were viewed and often flaunted during the period as an indicator of wealth and/or elevated social status, as Ancient Roman keys were typically comprised of bronze or iron, occasionally worn as decorative jewelry (e.g. rings, bracelets, belt attachments etc.), and used primarily to secure high value items (e.g. jewelry boxes, document cases, coin chests etc.) making them both functional tools but also visible reminders of social status and income. Because only the wealthy could afford metal keys within the Ancient Roman Empire, lower socioeconomic classes relied upon more simplistic, wooden lock mechanisms and in many cases left valuable possessions unsecured entirely. Some Ancient Roman keys featured intricate designs (e.g. animal motifs and geometric patterns etc.), personalized and designed to reflect the predilections of the owner of the key and the lock it is designed for. The Latin term for key, which is “clavis”, evolved and came to mean “code” or “solution” over time, which is notable because it demonstrates the period when physical access and security and intellectual access and security became conceptually correlated with one another. Archaeologists and historians have recovered metal keys from Ancient Roman villas, balneae (pronounced “bahl-neh-eye”) which are bathhouses, and burial sites, often discovered alongside personal items (e.g. grooming tools, coins, small religious tokens etc.). The modern day concept of personal security and having exclusive access to one’s belongings and/or information traces its origins back to these early locking mechanisms and keys as what began as a practical intervention for safeguarding valuables laid the foundation for the modern day systems of privacy, ownership, and controlled access to sensitive and/or valuable information or objects

The Advent of the Ancient Egyptian Clepsydra (Water Clock)

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The Clepsydra (pronounced “clep-see-drah”), more commonly referred to as the “water clock”, was among the earliest technological devices engineered for measuring time, predating mechanical clocks by over a millennia. The earliest known example of a clepsydra is from Ancient Egypt, constructed close to 1400 B.C., and attributed to an Egyptian court official named “Amenemhet” (pronounced “ah-men-ehm-het”). Clepsydra clocks operated using 1 of 2 primary designs; which includes both outflow and inflow setups. In an outflow clepsydra, water exited the chamber container through a small hole at the bottom, and the measurement of time was tracked by the continually lowered water level which was measured against internal markings. Inflow clepsydras reversed this design setup with water entering a marked container vessel, and the continually rising water level indicating the amount of time which had elapsed. The main challenge of the inflow and outflow designs was maintaining a consistent flow rate of water because as water drained, pressure dropped which slowed the drip rate and skewed the clocks accuracy. Ancient Greek engineer Ctesibius (pronounced “teh-sib-ee-us”) addressed this problem by introducing an overflow tank with a fixed water level, ensuring constant pressure and uniform water flow at all times. Ctesibius also added a float regulated valve system, an early feedback mechanism designed to stabilize inflow of water and prevent overflow, much the same as the float controlled fill valve (e.g. ballcock, float cup valve, diaphragm type inlet valve etc.) installed within toilets during the modern day. Subsequent future cepsydra designs implemented gears and escape mechanisms to convert water movement into mechanical energy/motion. Chinese engineers expanded further upon the concept of the clepsydra by introducing polyvascular systems, in which water flowed through multiple containment vessels in an effort to better regulate timing intervals. These innovations permitted water clocks to function independently of sunlight unlike sundials, the prevailing time keeping technology throughout history, and laid the foundation for regulated mechanical timekeeping which proceeded it. Despite limitations (e.g. temperature dependent viscosity, leakage and evaporation, the need for constant manual maintenance by human beings etc.), clepsydras remained in use for centuries and were the first controlled, replicable timekeeping systems in history only falling out of fashion during the late Middle Ages due to the ascendency of mechanical, pendulum and gear based clocks

The Period When Human Begins Developed a Throw Away Cultural Mindset

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Human beings have arguably been a throw away culture, or at the very least mindset and culture, since 1892 when bottle caps were first introduced. The trend has become more and more prevalent to the point where we now replace an entire transmission rather than a gasket. This shift reflects the rise of planned obsolescence, in which products are intentionally designed to have limited lifespans and/or be extremely difficult or expensive to repair. As manufacturing has become cheaper and mass production more efficient, the economic incentive to discard and replace overtook the values of maintenance and longevity. In all industries (eg. electronics, automotive, fashion etc.), repair has been sidelined in favor of convenience and profit. The result is a global surge in waste, with millions of tons of usable materials ending up in landfills each year. Fortunately, there is an expanding movement advocating for the right to repair one’s own possessions which is now acting as a counterbalance to this disposable mindset

The Origin of Google’s Name

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Google’s original name was “BackRub”, a reference to its early algorithm which analyzed backlinks to assess their importance. Backlinks are the hyperlinks pointing to webpages on the internet (e.g. navigation from one website to another etc.). Developed at Stanford University in 1996 by Larry Page and Sergey Brin, BackRub laid the foundation for PageRank, the ranking system which would later power the Google search engine. As the project matured, Page and Brin began to recognize and understand that the name BackRub did not reflect the vast scope of their ambitions for the company as the duo wanted a name that could capture the enormity of the data their engine could and eventually would process. This is why the name “Google” was chosen in 1997. Interestingly, during a domain search for “googol.com”, a mathematical term which represents 10¹⁰⁰ (10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 or 1 with 100 0’s after it) the friend who registered the domain name for Page and Brin accidentally typed “google.com” instead of “googol.com”. Originally this was an error but Page and Brin believed the misspelling to be simpler, more memorable, and visually cleaner therefore deciding to keep the name as it was

The Origin of Uppercase and Lowercase Letters and the Influence of Typesetting Upon the English Language

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The term “uppercase” and “lowercase” in relation to alphabet letters was derived during the Victorian period within England. Advertising was highly prominent during the 19th century and used ubiquitously by businesses. The poster makers who would serve these businesses would use letters which were essentially stamps, dipped into thick, viscous, oily ink, specifically formulated this way to cling to and transfer cleanly onto coarse paper which was designed to be rough so that it could absorb as much ink as possible. Compositors, which was the name for this particular vocation during the 19th century, would keep their letters in a type case with large letters at the top and small letters at the bottom. The letters were kept in what was effectively a suitcase which did not close which is where the terms “uppercase” and “lowercase” originated from, as the letters were stored in either the upper portion of the type case or the lower portion of the type case. Each individual letter, a block referred to as a “sort”, was cast in metal and crafted backward to be arranged by hand by a skilled craftsperson. The layout of the case, with capital letters in the upper section and lowercase letters in the bottom, was highly pragmatic, as it positioned the most often used letters at the bottom closer to the person setting the typeset. Interestingly, this pragmatism influenced the English language as compositors not only set letters, they also selected when to use punctuation, spacing, and line breaks, all of which shaped how text was read and understood. Because movable type requires physical pieces for every character used, punctuation was to be used deliberately as too many commas, colons, em dashes etc. meant more time spent, more metal used, and more space being taken up upon the page. This physical constraint helped standardize English punctuation use and even influenced sentence structure, encouraging clarity and economy in writing which are themes that have endured into the 21st century

The Fallacy of the American Cowboy Dueling at High Noon

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The classic cowboy motif of two gritty outlaws squaring off at high noon in the middle of the street is a fallacy. Street duels directly related to the American West have only occurred 5x – 10x from 1860 – 1900. The most well renowned high noon dual and the inspiration for much of the cowboy genre aesthetic within Hollywood cinema was in 1865, a standoff between Bill Hickok and Davis Tutt in Springfield, United States of America. This particular dual inspired over a century of cinematic exaggeration and hyperbole within the film genre. In reality, most gunfights within the American West during the 19th century were spontaneous, chaotic, and rarely honorable (e.g. ambushes from behind saloon doors or shootouts from areas with ample coverage etc.). Whilst Hollywood would later romanticize these rare dual encounters, the cowboy lifestyle day to day was far more rugged and utilitarian than it is depicted within media. Cowboys were working class laborers, much like agricultural workers of the modern day, they were often young, diverse in background, and driven by necessity of survival rather than personal glory. These men and women spent long days upon horseback herding cattle across a vast and unforgiving landscape, contending with harsh weather cycles, animal stampedes, and the constant threat of injury via animal or human being. The cowboy period of American history, although brief, played a vital role in shaping the economic and cultural landscape of the American frontier

The Architecture Which is Most Resilient to Earthquakes

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During the Chilean earthquake of 2010, very short buildings (e.g. 3+ stories) and very tall buildings (e.g. 25+ stories) were virtually unaffected, with the bulk of damage pertaining to buildings which were 10 – 20 stories high. The reason why shorter and taller buildings are able to withstand earthquakes with greater chances of survival is because earthquakes have natural rhythms which are frequencies. Crustal earthquakes have a high frequency like choppy water, and thus shorter and taller buildings are not affected. Subduction earthquakes move much slower in their rhythm and frequency with approximately 1 swell/cycle per 1 second, which causes sizeable damage to mid sized buildings. 10 – 20 story buildings tend to vibrate at 1 swell/cycle per second which causes a dangerous synchronicity in the vibrato as the rocking becomes more intense in its amplification with each additional second or swell/cycle, until the earthquake stops or the building collapses. Taller buildings sway much slower which gives them a lot of built in protection against even the largest earthquakes found throughout history

The First Assassination With a Firearm

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The first assassination using a firearm was of James Stewart the Earl of Moray, in 1570, who was assassinated by James Hamilton. Hamilton stalked Stewart for weeks, following him from Perth, Scotland to Stirling, Scotland, and finally pouncing when in Linlithgow, Scotland. Hamilton was well prepared, hanging a black cloth textile behind him so that his shadow could not been seen upon the street and putting down bird feathers to muffle the sound of his movements. As Stewart rode by, Hamilton raised up his weapon, a short barreled hunting carbine, and fired, hitting Stewart in the stomach. This shot caused much confusion but by the time Stewart and his entourage had figured out what occurred, Hamilton was long gone, as his escape route was pre-planned. Stewart managed to stumble to the home he was staying but died later that same evening. Hamilton was never caught for this crime but the entire act is immortalized in stained glass at Saint Giles’ Cathedral in Edinburgh, Scotland. This assassination caused chaos in Scotland and made the English court immensely nervous as bodyguards were no match for a distant assassin within the shadows who could pick off their target and vanish without a trace. Firearms were deemed during this era a threat to national security in Europe, especially after the advent of the wheel lock mechanism in 1515 which was a mechanized method of igniting gunpowder, allowing for the design of the pistol to work in practice for the very first time