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Friday, November 1, 2024

Remember to cast your ‘ballotta’

© Mark Ollig


The word “election” originated in the 13th century from the Anglo-French language, meaning “choice” or “selection.”

Ballotta is the Italian word for the “little ball” used in voting, from which the English word “ballot” is derived.

In the late 1500s, the people of Venice, Italy, would register their vote (in secret) by dropping a specifically marked or colored ball (ballot) into a container. The different colors or markings on the balls represented a particular vote or candidate. The balls were then counted to determine the winning choice.

Around 508 BC, Athens created a system to protect their democracy from tyrants and prevent anyone from gaining excessive power.

Citizens could write the name of someone they believed threatened the stability and well-being of the entire community on a piece of pottery called an ostrakon. If enough votes were cast, the person faced exile. This practice, known as ostracism, is where the word “ostracize” originates.

In 1856, William Boothby, then a sheriff of Adelaide in southern Australia, developed the Australian ballot method.
This method used secret paper ballots on government-issued forms printed with candidates’ names. Voters cast their ballots in an enclosed booth and placed them in a secure ballot box for hand-counting.

Boothby’s Australian secret ballot method spread to Europe and the United States, where voters in Massachusetts first used it during a US presidential election Nov. 6, 1888.

Early voting practices in our country often involved publicly declaring one’s chosen candidate aloud or writing their name on paper, often in front of others. This practice is known as non-secret voting.

Citizens using this “non-secret” ballot method were sometimes intimidated, coerced, or bribed monetarily to cast their vote for a particular candidate.

In 1888, Massachusetts and New York adopted the Australian ballot system statewide, which included government-printed ballots listing all the candidates, rather than having voters write in names or use ballots provided by political parties.

Privacy for ballot marking was ensured using compartmental booths or tables with partitions.

The Minnesota Election Law of 1891 required the use of the Australian ballot system for all general elections.

The January 1891 general statutes of the State of Minnesota says, “The election law of 1891, bringing the entire state under the so-called Australian system of voting in general elections, imposes important duties upon this office, also upon each and every town board and town clerk, all of which must be performed in proper order to secure a valid election.

Under section 44 of said law, each election district must be provided with three ballot boxes for voting, one ballot box painted white, one painted blue, and one painted black. There shall also be provided in each election precinct, two voting booths for every hundred electors registered. There shall also be provided an indelible pencil for each voting booth.”

Our use of the term “voting booth” likely originated from the name William Boothby, although this is not definitively proven. Back in the 19th century, a booth was also considered an enclosed space for animals inside a barn.

Minnesota used the Australian system of voting for the 1892 US presidential election.

A Minneapolis Times newspaper article from Nov. 15, 1892, titled, “Comment on the Australian Ballot System of counting” stated, “The Australian ballot law has its limitations, and those who’ve worked closely with it, like election judges, generally agree that while it’s effective in preventing illegal voting and ensuring ballots are cast secretly, it falls short when it comes to counting those ballots.”

Jacob Hiram Myers (1841 to 1920) obtained US Patent 415,549, titled “Voting Machine,” Nov. 19, 1889, which was the first mechanical lever voting machine.

In 1890, he founded Myers American Ballot Machine Company, and his voting machines were first used in Lockport, NY, in 1892 for a town election.

Unfortunately, Myers’ voting machines encountered significant problems during the Rochester, NY election of 1896, after which his company closed.

By the 1930s, improved models of mechanical lever voting machines were being used in many US cities; however, they were subjected to various problems, including being tampered with, and by 1982, most US production of these machines had ended.

Reading ballots using an optical mark-sense scanning system was first used in 1962 in Kern City, CA.

The Norden Division of United Aircraft and the City of Los Angeles designed and built this ballot reading method, which was also used in Oregon, Ohio, and North Carolina.

In the 1964 presidential election, voter jurisdictions in two states, California and Georgia, used punch cards and computer tabulation machines.

The 2000 presidential election is remembered for Florida’s punch card ballots and their “hanging chads” recount.

US Patent 3,793,505 was granted for “the Video Voter” Feb. 19, 1974. The abstract described it as “An electronic voting machine including a video screen containing the projected names of candidates or propositions being voted.”

The video voter was used in Illinois in 1975 and is considered the first direct-recording electronic voting machine used in an election.

Today, Minnesota ballot tabulators use optical scanner equipment to read and record the ballot vote for each candidate. Companies providing the state’s voting equipment include Dominion Voting Systems, Election Systems & Software (ES&S), and Hart InterCivic (Hart Verity).

Be sure to exercise your right to vote.

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image depicting a New York polling place from 1900 showing voting booths on the left. The image is public domain and is from the 1912 History of the United States, volume V. Charles Scribner's Sons, New York.


Friday, October 25, 2024

My ‘additive manufacturing’ journey

© Mark Ollig


3D printing, also known as additive manufacturing, creates physical objects from digital files. 

These files can be designed with Computer-Aided Design (CAD) software or found online.

Materials like plastics and metals are used to make physical objects/models, built layer by layer with a 3D printer.

Recently, my two youngest sons gave me a Bambu Lab A1 mini 3D printer as a birthday gift. 

The second oldest son is a 3D printing enthusiast and has printed some models for me, like the NASA Viking 1 lander and the James Webb Space Telescope. 

During the COVID-19 pandemic, he was printing sturdy casings to hold the filter used with N-95 masks. 

He also printed an incredibly realistic miniature of the moon’s surface using artificial moon dust called regolith. This mini moonscape now serves as the landing spot for my model of the Apollo 11 lunar module.

The Bambu printer came out of the box and was nearly fully assembled. The printer fits nicely on the wooden stand that once held my Xerox laser printer, which I had given to my oldest son after purchasing a new HP model.

The Bambu Handy software application allows me to control the 3D printer directly from my smartphone or laptop. 

Today’s computing landscape is all about apps and cloud-based programs, a stark contrast to the floppy disk days of yesteryear.

According to Bambu Lab’s website, their A1 mini 3D printer weighs 12.2 pounds and measures 13.7 inches high, 12.4 inches wide, and 14.4 inches deep. 

The build volume, or maximum size of the object model it can print, is 7.1 by 7.1 by 7.1 inches.

I turned on the 3D printer, installed its app, connected the printer to my internet router’s Wi-Fi, and registered with Bambu Lab.

Bambu Lab’s 3D printers use custom, non-open-source computing firmware, reportedly a Linux-based operating system. Two popular open-source firmware options for 3D printers are Marlin, created in 2011, and Klipper, developed in 2016.

I loaded the Polymaker spool of 1.75 mm (0.069-inch) polylactic acid (PLA) filament onto the 3D printer’s spool holder. PLA is a type of biodegradable plastic. The spool, on which 1,082 ft of filament is rolled, weighs 2.2 lb and is made of recycled cardboard. 

Next, I threaded the Savannah Yellow-colored filament into the polytetrafluoroethylene (PTFE) guide tube, which led to the printer’s hardened steel extruder.

The Bambu Lab A1 has four stepper motors, one of which powers the extruder, which draws the filament into the nozzle within the tool head, where it is heated from 374 to 446 °F. The printer is capable of reaching temperatures up to 572 °F.

Calibration of the 3D printer involves leveling its build plate and adjusting nozzle height, filament flow, temperature, and belt tension to ensure accurate and reliable layer printing at speeds up to 19.7 inches per second. 

The dynamic flow control program ensures the 3D printer dispenses the correct amount of plastic filament.

I used the app to connect to Bambu Lab’s cloud servers, where I chose a digital model from their library. 

To evaluate the printer’s performance, I printed a 3D Benchy tugboat.

This highly detailed tugboat is a standard test for 3D printers. It helps to see how well the printer can replicate complex features like curves, small details, and inclined planes.

I trimmed the filament tip and threaded it through the tube until it reached the extruder, which feeds and controls the flow of melted plastic to build each layer of a 3D print. 

I then tapped the “Load” icon on the color touchscreen at the front of the 3D printer. 

The extruder smoothly pulled the filament through the PTFE tube and into the hotend of the tool head, where it would be melted for printing my model.

I then saw part of the yellow filament emerging from the nozzle, which meant the printer was ready.

The 3D printer began extruding the heated, melted plastic filament, following the digital file instructions to build the tugboat layer by layer on the build plate.

The app provides a live video feed of the tugboat’s construction from the camera attached to the 3D printer. 

The 3D printer performed flawlessly, producing a robust yellow tugboat model with smooth lines and distinct features like a smokestack and windows. 

I was also impressed by how quietly the printer ran from start to finish. 

As this is Halloween season, I also printed a robotic-looking skeleton.

My son proposed a fitting analogy for 3D printing: Building a brick wall involves stacking layers of bricks, while a 3D printer builds objects in layers of plastic. 

I like this printer and consider it an incredible tool for exploring the possibilities of 3D printing on a personal scale.

Forty years ago, while working for the Winsted Telephone Co., I clearly remember unrolling copper-paired cable from a heavy wooden spool mounted on a trailer hitched to the company’s yellow 1965 Ford F-100 service/utility truck. 

These days, I am threading thin plastic filament from a lightweight recycled cardboard spool attached to a 3D printer.

 Perhaps tackling a 3D-printed model of that old ‘65 Ford telephone truck will be my next project.

Thank you for the great birthday present, boys.
Finished tugboat and robotic skeleton 3D printed and placed on the build plate of
the Bambu Lab A1 model printer.
(Photo by Mark Ollig)

Bambu Lab A1 mini 3D printer building the tugboat.
(photo by Mark Ollig)





Friday, October 18, 2024

‘Air Mail’ within a tube network

© Mark Ollig


From 1889 to 1893, John Wanamaker served as US Postmaster General and strongly advocated pneumatic mail delivery.

In 1892, Congress appropriated $10,000 to Philadelphia to build a two-and-a-half-mile network of eight-inch pneumatic mail tubes beneath the city streets.

In 1893, the Philadelphia Post Office became the first US high-speed delivery mail transport system.

This system used air pressure to propel a cylindrical capsule or container (sometimes referred to as a carrier) through a network of tubes between post office substations and the main post office.

Capsules were made of gutta-percha (similar to rubber but harder and less elastic), leather, wood, durable fibers, steel, and a mostly brass shell casing.

The Philadelphia Times wrote the new pneumatic tubes were a “conspicuous success” Feb. 19, 1893.

“Postmaster General Wanamaker and Philadelphia Postmaster Field inaugurated the pneumatic tube, and after dedicating it to piety and patriotism by the Bible and the flag [included inside a container], sent mail matter through it with such speed as to obliterate time,” the article said.

The sound made by a capsule rushing through the tubes was described as “whoosh!”

The capsules varied in diameter depending on the size of the tubes, typically six to seven inches for the eight-inch tubes and around five inches for the six-inch tubes.

To return capsules, the system removed air from the tubes, creating lower pressure that pulled them back, allowing two-way travel within the same tubes.

The pneumatic tube system used electric motors, rotary blowers, and air compressors to create air pressure (3 to 8 psi) that pushed capsules through the tubes.

Although the capsules could reach up to 100 miles per hour, the turns in the tube network limited their average speed to 30 to 35 mph. Reaching their destination, the mail containers emptied onto a cloth-aproned catch.

A majority of the pneumatic tube network was located underground and within buildings.

The tubes usually connected with each other using flanging, which widened the tube ends, which were secured with bolts and a gasket to the next tube for an airtight connection.

Lead-based soldering was used for junction points where tubes branched off or changed direction.

Due to high costs and fabrication challenges, steel wasn’t commonly used for pneumatic tube construction until the early 1900s.

“Mail Matter Cut in Pneumatic Tubes” was the Philadelphia Inquirer newspaper headline March 5, 1893, describing “an accident in the service that destroyed many letters.”

The article mentioned a “serious hitch” that temporarily disrupted mail delivery between postal substations and the post office’s pneumatic tube system.

The lid of a mail carrier capsule wasn’t properly fastened. As it traveled through the tube system, it detached, spilling mail parcels that were then shredded by another speeding capsule, “cutting them to pieces,” as the newspaper put it.

The Pneumatic Transit Company operated the Philadelphia mail tube system.

The Philadelphia Inquirer published “The Pneumatic Tubes Facilitate the Handling of Post Office Business” on May 2, 1893. The article stated that the pneumatic tube between the main post office and the East Chestnut Street substation was operational, and that the new system would deliver mail much faster. It also noted previous problems, likely referring to the “serious hitch” described in the March 5 article.

New York City started using a network of pneumatic mail tubes Oct. 7, 1897, mostly made of cast iron with an inside diameter of eight and one-eighth inches buried four to six feet below the ground.

A capsule carrier pierced with holes and filled with oil would occasionally be sent through the tubes to keep them lubricated.

Due to the fast speed of the mail carriers traveling through the pneumatic tubes, the New York City postal workers operating them were nicknamed “rocketeers.”

In time, New York City was using 27 miles of tubes connecting 23 post offices.

Pneumatic mail tube systems began in Boston (1897), Brooklyn (1898), St. Louis (1904), and Chicago (1898).

The 1909 US Government Printing Office report “Investigations as to Pneumatic-Tube Service for the Mails” notes, “The contract speed of 30 miles an hour between stations is in strong contrast with the contract rate for mail-wagon service, which would range from three to five miles per hour.”

The same report states the US Congress’ post-office appropriation bill for the fiscal year ended June 30, 1909, provided “for the transmission of mail by pneumatic tubes or other similar devices, $1,000,000.”

By 1915, six US cities used pneumatic tubes: New York, Brooklyn, Boston, Philadelphia, Chicago, and St. Louis, according to the United States Postal System.

In the years that followed, more economical mail transport methods led to the decline in use of the mail tube system.

In late 1953, the US Post Office Department ended its use of tube systems for mail delivery, citing tube capacity limits due to expanded mail volume, high costs, and maintenance.

I found no record of Minnesota ever having used a pneumatic tube system for delivering the US mail.

Today, pneumatic tubes are being used in hospitals, manufacturing facilities, industrial facilities, and bank drive-throughs.

The pharmacy where I pick up my prescriptions has a drive-through pneumatic tube system.



Friday, October 11, 2024

RCA’s ‘All-Shook Up’ journey

© Mark Ollig

The Wireless Telegraph and Signal Company was established July 20, 1897, the world’s first wireless electronic communications enterprise.

It was founded to market the inventions of Italian inventor Guglielmo Marconi, who pioneered wireless telegraphy.

Headquartered in England, it was renamed Marconi Wireless Telegraph Company in March 1900.

The company’s American subsidiary, the Marconi Wireless Telegraph Company of America (later American Marconi Wireless), was established in 1899.

The US had also been pioneering wireless technology.

In 1900, Nikola Tesla was granted US Patents 645,576 and 649,621 for a wireless power transmission system that included technologies enabling wireless communication.

Tesla’s innovations laid the groundwork for many of the wireless technologies we use today.

From 1899 to 1900, the US Navy conducted experimental wireless telegraphy technology trials.

American inventor Lee de Forest developed the three-electrode Audion vacuum tube in 1906, which significantly improved radio signal amplification and detection.

The General Electric Company (GE) began the Radio Corporation of America (RCA) Oct. 17, 1919.

RCA would assume the radio rights of GE and was initially established with involvement from several companies, including Westinghouse Electric Corp., to take over the assets of American Marconi Wireless.

General Electric (GE) acquired the Marconi Wireless Telegraph Company of America for $3.5 million Nov. 20, 1919, along with the US rights to Marconi’s wireless technology.

Reportedly, the US Navy pressured Marconi to sell its American subsidiary to ensure that the transatlantic radio technology would be under US control, ultimately leading to GE’s acquisition of Marconi Wireless Telegraph Company of America.

RCA gained control of radio-related assets and patents from various companies, including American Marconi Wireless, General Electric, Westinghouse, AT&T, and the Wireless Telegraph and Telephone Company.

By 1926, vacuum tube technology had rapidly advanced, along with the growing AM radio presence in the US.

That same year, RCA established the National Broadcasting Company, pioneering the formation of national radio networks.

In 1929, RCA acquired the Victor Talking Machine Company, known for its “Victrola” phonograph record players and the iconic “His Master’s Voice” logo, with the dog Nipper listening to the speaker attached to a gramophone.

It was renamed the RCA Victor Division of the Radio Corporation of America. RCA Victor was a leading record label that signed iconic artists such as Elvis Presley.

In 1932, the US government sued General Electric in a federal antitrust lawsuit for monopolizing the radio industry. As a result, General Electric had to sell RCA to allow for more competition, which enabled RCA to grow independently.

In 1936, RCA conducted experimental television broadcasts in the New York area, using a limited number of television sets primarily for its employees.

One of the main attractions at the 1939 New York World’s Fair was RCA’s “The Magic Brain,” a large display resembling a radio with lights illuminated in sequence. The display showed how a TV signal traveled from a camera to a transmitter and a TV screen, and a narrator explained the process.

In 1940, developers at RCA supplied six CXAM radar systems to the US Navy, marking the first radar deployment on US naval vessels.

CXAM: C represents the Navy classification, X refers to the X-band frequency range, A indicates air-search, and M stands for microwave.

Four years earlier, RCA manufactured the VT-138 vacuum tube, a round electron-ray indicator tube commonly used in radios as a tuning aid with a glowing green indicator.

During WWII, miniaturized versions of these electron-ray indicator tubes were adapted for use in military proximity fuses attached to ordnance, such as bombs.

NBC’s New York station, WNBT (now WNBC), began airing regular commercial television broadcasts July 1, 1941.
Manufacturing and public sales of RCA’s CT-100, the first commercially available color TV, began March 25, 1954.

In November 1955, RCA Victor purchased Elvis Presley’s contract from Sun Records for $35,000 (about $411,000 today) and began selling what turned out to be many millions of vinyl records.

In 1968, the RCA Victor Division was renamed RCA Records and continued to release Elvis’s music on records, eight-track tapes, cassette tapes, and compact discs (CDs).

In 1986, General Electric acquired RCA Corporation for approximately $6.28 billion, gaining control of NBC’s television network holdings (then known as NBC, now NBCUniversal), along with other RCA assets.

In 1987, GE focused on core areas like broadcasting (NBC) and financial services (GE Capital), selling some RCA assets, including its consumer electronics manufacturing operations, to Thomson-Brandt, S.A., a French multimedia and electronics manufacturer.

GE retained ownership of NBC until 2011, when Comcast acquired a 51% majority stake in NBCUniversal, with GE holding a 49% stake. Two years later, Comcast obtained GE’s remaining 49% portion.

RCA was founded 105 years ago, and though the company itself may be gone, its trademark name and logo, now owned by Talisman Brands in Houston, TX, live on through licensing agreements for various consumer electronic products.

RCA Records remains an exclusive label under Sony Music Entertainment, and its history is one which seems to echo Elvis’ recording of “All Shook Up.”

My music collection contains the 1972 RCA Victor label (with Nipper) stereo LP record album of “Elvis as recorded at Madison Square Garden,” and an Elvis Presley 1973 RCA eight-track tape cartridge.




Friday, October 4, 2024

The early days of Minnesota television

© Mark Ollig


“The managing director of the British Broadcasting Company, J. W. Reith, says that television, the transmission of pictures as well as the voice by radio, is theoretically quite possible,” the Minneapolis Journal reported May 7, 1924.

Around 1923, Minnesotan Stanley E. Hubbard organized WAMD (“Where All Minneapolis Dances”), a 1,000-watt radio station at the Marigold Gardens Ballroom. He had a small studio and a transmitter there.

The Minneapolis Star newspaper announced Saturday, Feb. 21, 1925, “The station [WAMD] will broadcast on 234.8 meters [1,277.7 kilocycles] and will operate between 2:45 and 5:30 p.m. Sunday.”

WAMD began broadcasting live music Feb. 22, 1925, from inside the Marigold Gardens at 1336 Nicollet Ave. in Minneapolis. In July, the station moved to the downtown Radisson Hotel at 35 S. Seventh St.

Hubbard started KSTP radio March 29, 1928. In August, he became interested in experimental radio picture broadcasts, employing a mechanical scanning system that used optical still images transmitted via radio signals.

Mechanical scanning utilizes rotating disks, drums, and mirrors to capture and display images, then breaks them down into horizontal lines for transmission and reconstruction.

KSTP broadcast still images over its radio waves four times a week, but only a few people had a mechanical scanning television set (called a televisor) to see them.

In 1928, amateur radio hobbyists experimented with constructing television receivers. One example had a housing measuring 23-by-26-by-12 inches, featuring a 1.5-by-1.25-inch glass screen, with its internal mechanical scanning system powered by five 45-volt B (dry cell) batteries.

In 1933, Dr. George A. Young obtained a license for Minnesota’s first experimental television station, W9XAT, which used mechanical scanning-disc broadcasting equipment.

The picture quality was reportedly “subpar,” and the audio was transmitted over his WDGY radio station on 780 kHz until 1934, then on 1130 kHz until he ended his experimental television broadcasting in 1936.

In 1938, 100 experimental television sets were reported to exist in the country, mainly in the possession of corporate executives and manufacturing engineers testing this new visual medium.

In August 1939, Hubbard arranged a public demonstration of television viewing of an American Legion parade via a closed-circuit broadcast on six television sets at the Radisson Hotel.

Minnesota’s first commercial television station, KSTP-TV, began broadcasting Tuesday, April 27, 1948, on channel five with a test pattern, followed by a Minneapolis Millers baseball game at 3 p.m. and narrated newsreels.

The Radio Manufacturers Association, which tracked radio and television statistics, reported that more than 6,000 television sets were in operation in the Twin Cities area Aug. 3, 1948, with many of them in hotels, bars, and restaurants.

WTCN-TV (now KARE-11) started broadcasting on channel four July 1, 1949.

During the 1940s, TV sets were expensive and primarily found in affluent homes and businesses. RCA, Zenith, General Electric, Admiral, Emerson, Andrea, Philco, and DuMont were the leading manufacturers of televisions.

Decreasing prices, the growing number of television programs, and the wonder of the new technology drove people to purchase TVs.

The Twin Cities joined major television networks Sept. 30, 1950, via coaxial cable and radio relay transmission towers.
NBC, CBS, and ABC provided the majority of national programming during the 1950s. The DuMont Television Network also offered national broadcasting from 1946 until 1956.

In 1952, WTCN-TV’s channel four license was sold and used for the broadcast frequency of WCCO-TV.

In 1953, WTCN-TV reappeared with WMIN-TV in a time-sharing arrangement on channel 11 using its VHF frequencies of 198 to 204 MHz.

In 1955, WMIN-TV sold its share of channel 11 to WTCN-TV, allowing WTCN-TV to begin broadcasting full-time.
In January 1953, KSTP-TV became the first television station in Minnesota to broadcast at the maximum allowed 100,000 watts by the FCC, reaching viewers in Brainerd and Duluth.

NBC’s color broadcast Jan. 1, 1954, of the Tournament of Roses Parade in Pasadena, CA, marked the first time such a transmission was available nationwide.

It is estimated that around 100 color television sets, likely prototypes or early production models, across the country received the broadcast, as manufactured models only appeared a few months later.

An April 26, 1954, Minneapolis Star newspaper ad showed the RCA Victor CT-100 color television set with its Tri-Color Picture Tube and a 15-inch screen selling for a pricey $1,000 ($11,746 today).

In 1957, Twin City Area Educational Television from the University of Minnesota’s St. Paul campus began broadcasting on channel two.

KSTP-TV made history Jan. 1, 1961, by becoming the first station to broadcast its entire program schedule in color.

In 1954, WTCN-TV channel 11’s children’s program “Lunch With Casey” was hosted by Casey Jones (Roger Awsumb) with Roundhouse Rodney (Lynn Dwyer). The same year, WCCO-TV began “Axel and His Dog,” featuring Clellan Card as Axel Torgeson and Mary Davies as Carmen the Nurse.

In 1960, “Romper Room,” hosted by Mary Betty Douglass, known as “Miss Betty,” aired on WTCN-TV and moved to KMSP-TV channel 9 in 1962.

By 1966, many programs were broadcast in color. I clearly remember hearing, “The following program is brought to you in living color on NBC.”

Each week, from 1966 to 1969, I watched “Star Trek” on KSTP-TV channel five.

And yes, the program was brought to me in living color on NBC.

A Minneapolis Star newspaper ad for the RCA
Victor CT-100 color television
 (published April 26, 1954)

Friday, September 27, 2024

QR Codes: mysterious square 2D patterns

© Mark Ollig

We see and scan them every day: those small black-and-white squares made up of grid-like patterns representing digital data arranged in complex code.

These patterns employ various two-dimensional (2D) algorithms and error correction mechanisms to store different types of data, all scannable with our smartphones.

A Japanese company, Denso Wave, a subsidiary of Denso, and its development team led by Masahiro Hara introduced Quick Response (QR) codes in 1994 to improve inventory tracking.

The term “Quick Response code” originates from its ability to be rapidly scanned and decoded by a QR scanner or your smartphone’s camera, providing quick access to its encoded information.

A QR code is composed of visual binary data in the form of black squares on a white grid pattern, allowing it to store data both vertically and horizontally in two dimensions.

This unique pattern enables it to hold more information than a traditional one-dimensional (1D) barcode, which can only encode data horizontally.

Two decades before QR codes, product information was printed on attached barcode labels featuring a pattern of black stripes and white gaps that encoded data as binary digits, ones, and zeros.

Barcodes with varying lines and spaces represent specific information through differences in thickness.

A clean and clearly printed barcode with a strong contrast between dark bars and light spaces is necessary for accurate scanning.

Fifty years ago, on June 26, 1974, a pack of Wrigley’s Juicy Fruit gum was the first commercial use of a barcode when it was scanned at Marsh’s Supermarket in Troy, OH.

In 1992, Masahiro Hara was involved in the development of barcode scanners and optical character recognition (OCR) devices.

“Workers had to scan as many as 1,000 barcodes a day, which wasn’t very efficient. We needed a compact code that could store more information, including Japanese characters, and could be read quickly,” Hara said on Denso’s website.

“We will develop a compact code that can store more information, including kanji and kana characters [Chinese characters that represent whole words or concepts in Japanese], and at the same time can be read at higher speed,” he added.

His team at Denso Wave set out to design a coding system, which led to the development of the QR code.

It is said the idea for the QR code data patterns originated from a 2,500-year-old Chinese game called Go, a strategy board game visually comparable to QR codes. Go uses black-and-white elements on a grid to represent strategic game positions, and QR symbols use black-and-white squares to represent data.

Initially, QR codes required a separate software programming application for scanning the code’s data, as early phone cameras had difficulty interpreting them.

Today’s smartphones are equipped to read QR codes using the phone’s camera, and if that fails, one can install a QR code reader app.

QR codes link to websites, text, images, videos, apps, social media, virtual business cards, events, and even restaurant menus.

I recall first seeing QR codes displayed around 2007 in magazines, posters, stationery, and business cards.

Sunday, I was traveling on Highway 7 to Winsted, passing through St. Bonifacius, when I saw a QR code on a highway billboard, which surprised me.

I mean, taking your eyes off the road to focus on your phone to scan a QR code increases the risk of a crash, and at 65 mph, a car travels approximately 95 feet per second.

We should be aware that some QR codes may be malicious, leading to phishing sites, malware, or redirecting users to harmful content.

Fortunately, many modern smartphone camera apps include a safety feature that often displays a preview of the web link or file name embedded within the QR code, allowing users to assess its legitimacy before proceeding.

The research firm Statista projects that the number of smartphone users in the U.S. scanning QR codes will increase to around 111.3 million in 2025, compared to the 89 million users who did so in 2022.

Create your own unique QR codes using Bitly, an American company based in New York, at https://bit.ly/3XxSsYc.



Friday, September 20, 2024

Find it with a smart tag

© Mark Ollig

There have been times when we have found ourselves searching for lost keys, wallets, or the car we parked somewhere.

In the American Wild West era, human trackers were skilled at finding people lost, missing, or on the run from the law.

I recently purchased an electronic digital tracker, a smart tag called the Samsung SmartTag+, which is compatible with my Samsung Galaxy S21 Ultra 5G phone.

Other smart tag makers include Tile Inc., an American company owned by Life360, and AirTag, owned by Apple, Inc.

Smart tags can be fastened to things you want to be able to track on a map or find if they are lost.

They are commonly attached to luggage, electronics, car keys or keyless fobs (frequency-operated buttons), pets, and, yes, kids.

One can also leave a smart tag in the car to make it easier to find, especially in those huge parking lots.

SmartTag+ came with a simple-to-use Quick Response (QR) Code to install the SmartThings app on my phone. The app can manage up to 200 SmartTags. Your phone needs to have at least the Android 11 operating system.

My phone uses the Android 14 operating system.

The SmartTag+ includes 512KB of flash memory, measures 1.54 inches long by 1.54 inches wide, and weighs 0.46 ounces.

It operates using Bluetooth Low Energy (BLE) and Ultra-Wideband (UWB) technology for tracking and does not require a Wi-Fi connection.

BLE was developed to exchange data over short distances between devices and uses little energy because it stays in sleep mode until it needs to connect.

Depending on the environment, the BLE SmartTag+ nominal range is up to several hundred feet from the attached device to your phone.

However, suppose your SmartTag+ Bluetooth signal gets too far away from your phone.

In that case, the SmartThings Find network will help you find it, tracing your tagged items location through other attached devices using the SmartThings Find network service, which employs other Samsung Galaxy devices to relay your SmartTag+ location securely and anonymously.

So, when your SmartTag+ tracked item is lost, it can still be located even if it’s out of your phone’s Bluetooth range, thanks to the SmartThings Find network. Other Samsung users with compatible Galaxy devices might unknowingly help you find your item by simply being near it.

Items tagged with Apple’s AirTag can also be found if they are out of Bluetooth range using other Apple devices connected to their Find My network.

UWB is a type of short-range wireless communication (usually around 30 to 60 feet) using extremely high frequencies for precise location tracking within a shorter range.

The International Electrotechnical Commission (IEC) created IP (Ingress Protection) ratings in 1989 to classify the level of protection of an electronic device casing or housing enclosure. Of course, at first, I thought IP meant Internet Protocol.

The SmartTag+ has an IP52 rating, meaning it offers decent protection against dust and light splashes of water but is not suitable for harsh environments or being submerged in water.

In 1994, Sweden’s telecommunications company, Ericsson, created Bluetooth for short-range wireless mobile phone communication with a headset, computer, or other devices using the 2.4 GHz frequency band.

The name Bluetooth was inspired by King Harald “Bluetooth” Gormsson, a 10th-century Danish king.

In my car, I synchronize my Android phone to my laptop using an app called Phone Link. Bluetooth connects my phone to the car’s infotainment display screen.

The Global Positioning System (GPS) has a superior tracking range to Bluetooth because the GPS network of earth-orbiting satellites tracks items in real time over long distances worldwide.

GPS uses satellite radio signals designated for commercial/civilian GPS devices. Its other signals are used with the military’s extremely accurate GPS network.

Even if your car has a GPS, a Bluetooth tracker can be helpful; if your car’s GPS becomes disabled or you are in an area with weak GPS signals, a Bluetooth tracking device’s location could still be determined.

Bluetooth trackers are much more affordable than GPS tracking devices. I paid $22 for my Samsung SmartTag+, and various Bluetooth tracking tags were priced from $20 to $50.

Bluetooth trackers use batteries that need to be replaced periodically, on average, every one to two years. The SmartTag+ CR2032 battery will last up to 500 days. The SmartThings app allows you to check the battery’s level.

Bluetooth’s accuracy is reliant on signal strength and proximity.

KeySmart, a Los Angeles company, created the thin tracker called the KeySmart Card, which one can put in a billfold.

Its Bluetooth technology is designed to work exclusively with Apple iOS devices. The card can be tracked using Apple’s Find My network from iOS devices.

The Orbit Bluetooth Tracker is a small device that can attach to your glasses frame and works with Apple’s Find My network through the “Orbit app” on your iOS device. It is priced at around $45 and is not compatible with Android.

Tile, Inc., is releasing new versions of its Bluetooth trackers, including Tile Mate, Tile Slim, and Tile Sticker. These trackers can be securely attached to various surfaces (including eyeglass frames) and work with the Tile app on iPhones and Android phones.

As for the SmartTag+, I keep one in my car.

Samsung SmartTag+, a digital tracking smart tag compared to the size
 of a quarter.
(photo by Mark Ollig)

Friday, September 13, 2024

Reaching the moon: 65 years ago

© Mark Ollig


On Jan. 2, 1959, the Soviet Union launched the Luna 1 probe (Lunik 1) toward the moon using its Luna 8K72 rocket.

In Latin and Russian, “Luna” and “Lunik” mean “moon,” respectively, with “Luna” commonly used today.

The 8K72 rocket was derived from the R-7 missile, which had originally been developed as an intercontinental ballistic missile (ICBM).

Luna 1 missed its intended lunar surface impact by 3,700 miles and continued past the moon; its batteries became drained 62 hours after launch, at a distance of 370,000 miles from Earth. 

It ended up becoming the first human-made object to enter a heliocentric orbit, circling the sun.

Luna 2 was launched on Sept. 12, 1959, from Baikonur Cosmodrome, USSR.

Once the Modified SS-6 (Sapwood) rocket, a variant of the R-7 missile, broke free from Earth’s gravitational pull, Luna 2 detached from the rocket’s third stage and began its journey toward the moon, traveling at a speed of approximately 25,000 mph.

Luna 2 released bright orange sodium gas from its containers at about 97,000 miles from Earth to aid in tracking the spacecraft and studying the behavior of gaseous fumes in space.

The Luna 2 spacecraft weighed 860.2 pounds and carried two scientific instruments to the moon: a Geiger counter and a triaxial fluxgate magnetometer powered by a 360-volt battery.

The Geiger counter on board the Luna 2 spacecraft studied the electron spectrum of the outer Van Allen radiation belt.

The triaxial fluxgate magnetometer collected data on the spacecraft’s location and navigation and the Earth’s magnetic field composition.

The Luna 2 spacecraft transmitted data to Earth using radio telemetry while en route to the moon.

On September 13, 1959, at 4:02 p.m. CDT, in Minnesota, the spherical-shaped, multiple-antennae Luna 2 spacecraft stopped transmitting its radio signals, confirming its impact on the moon, which was 234,140 miles from Earth at that time.

Luna 2 became the first spacecraft from Earth to make physical contact with a celestial body within our solar system.

Since the Luna 2 spacecraft did not contain an independent propulsion system, it could not perform a controlled power descent to land safely on the moon.

Instead, the spacecraft intentionally crashed on the lunar surface between Mare Imbrium and Mare Serenitatis at 7,382 mph.

Pieces of Luna 2 now lie about 30 to 35 miles south of the Autolycus crater and approximately 160 miles southwest of the Apollo 15 lunar module Falcon’s July 30, 1971, landing site, near the Hadley Rille in the Palus Putredinis region of the Imbrium Basin.

Pentagonal metal sphere pendants with the USSR hammer and sickle on one side and the launch date on the other were scattered across the lunar surface by Luna 2’s crash, as they were designed to do.

Professor Bernard Lovell, director of the Jodrell Bank Radio Astronomy Station in England, wrote a Sept. 28, 1959, article in LIFE magazine about his tracking Luna 2 to the moon to prove it was not a “faked mission.”

Lovell was able to verify the reception of the Luna 2 telemetry signals using the giant radio telescope at Jodrell Bank, Cheshire, Northwest England.

He shared Luna 2’s signals with American counterparts, saying: “I held the transatlantic telephone to our loudspeaker so they could hear the bleeps [audible radio signals] for themselves.”

Lovell described the signals as “strong and clear” before they abruptly stopped, indicating Luna 2 had hit the moon.

July 28, 1964, NASA launched Ranger 7 from Cape Canaveral, Fla., which became the first U.S. spacecraft to take close-up photos of and make contact with the moon.

Ranger 7, using its high-gain antenna, sent 4,316 photographs of the lunar surface to Earth.

On July 31, 1964, Ranger 7 took its last two photos of the lunar surface from heights of approximately 3,510 feet and 1,702 feet just before intentionally colliding with the moon.

On April 20, 1967, NASA’s Surveyor 3 lander safely landed on the moon and, for 14 days, sent data back to Earth used for the upcoming Apollo moon landings, including 6,326 TV pictures from the lunar surface.

On Nov. 19, 1969, the Apollo 12 astronauts Charles Conrad, Jr., and Alan L. Bean landed their Intrepid Lunar Module approximately 590 feet from Surveyor 3.

The next day, they visited the Surveyor 3 site.

The astronauts took out the television camera and other parts to bring back to Earth. Scientists studied how the lunar environment affected these human-made materials during prolonged exposure.

On Feb. 22, 2024, the Texas-based Intuitive Machines’ Nova-C lander, named Odysseus, touched down near the moon’s south pole.

Despite tipping over, the uncrewed lander operated for about five days, conducting experiments and sending data and images to Earth.

On June 1, 2024, Chang’e 6 landed on the far side of the moon, collected lunar soil samples, and returned them to Earth on June 25, 2024.

China aspires to send astronauts to the moon by 2030 and establish a research base at the lunar south pole, an area believed to contain water ice.

I sense a new space race beginning.

NASA photo from Dec. 20, 1972.
Apollo 17 astronaut Charles Conrad. Jr. (Commander) inspecting the Surveyor 3 lander.
The photo was taken by Alan L. Bean. (Lunar Module Pilot). The Lunar Module, Intrepid,
is seen about 590 feet in the background.


Friday, September 6, 2024

Smartphones (and radios) in the classroom

© Mark Ollig


Those who went to high school with me will recall the only telephone we had access to was the payphone on the wall next to the trophy case.

In today’s school environment, technology is integrated into the learning curriculum. Students use their smartphones to access the internet and the web, research subjects, and connect with family, friends, and social media.

The first commercial 1G cellular telephone network was activated in Chicago on Oct. 13, 1983.

The first commercially available handheld mobile cellular phone used on this network was the Motorola DynaTAC 8000X, often referred to as “The Brick.”

The Oxford English Dictionary states that “cellphone” was first used as a single, unhyphenated word in the magazine Cellular Business on Nov. 24, 1984.

Over the past 40 years, the cellphone has evolved far beyond its original purpose as a calling device into a powerful smartphone packed with cutting-edge technology and features.

However, we still call it a “cellphone,” as the term is commonly used and understood in everyday conversation.
As a retired telephone guy, one comparable analogy is touchtone and rotary dial telephones.

Although touchtone pushbutton phones have replaced rotary dial telephones, we still say “dial the phone number,” not “push the buttons of the phone number.”

Come to think about it, we also say, “Call the number.”

In 1997, the term “smartphone” was used to describe the Ericsson GS88, a prototype cellular mobile phone developed in Sweden that included a monochrome touchscreen, stylus pen, keyboard, email, text messaging, web browsing, and computer connectivity.

Although approximately 200 GS88s were manufactured, none were ever sold to the public.

For today’s column, I will sometimes use “cellphone” as a general term to encompass both basic cellphone and smartphone technologies.

Students do use cellphones for study and research while in school; however, concerns about their distractions and misuse in the classroom have led to certain restrictions being put in place.

Some people view having a cellphone in the classroom as a temptation to get the answers for tests and quizzes.

There is also concern about recording audio or taking photos and videos of students and teachers without their consent.

In May 2023, the Governor of Florida signed House Bill 379 into law, which became effective July 1, 2023. This bill restricted the use of cellphones in classrooms during school hours and regulated students’ use of social media on school Wi-Fi networks.

Section 1006.07 of the Florida Statutes requires that school districts’ codes of student conduct prohibit student use of wireless communication devices during class time.

The Florida Statute allows teachers to establish classroom rules of conduct, which could include collecting cellphones before class or confiscating them if students use them during class.

Section 3 of House Bill 379 states: “Prohibit and prevent students from accessing social media platforms through the use of Internet access provided by the school district, except when expressly directed by a teacher solely for educational purposes.”

In California, Assembly Bill 4216 is slated to take effect on July 1, 2026. It requires school districts to establish and periodically revise policies regarding the restricting or prohibiting of students from using smartphones while at school.
Minnesota enacted Statute 121A.73, also known as the “School Cell Phone Policy,” during its 2024 legislative session. It went into effect on May 18, 2024.

Subdivision 1 of this statute requests the Minnesota School Boards Association to develop a model policy addressing the possession and use of cellphones in schools by Dec. 15, 2024.

Subdivision 2 decrees that Minnesota school districts and charter schools adopt their policies regarding cellphone possession and use in school by March 15, 2025.

Statute 121A.73 requires these policies to be included in the student handbook and readily available on the district or charter school website.

Other states, including Virginia, Louisiana, and Georgia, have also introduced legislation restricting cellphone use during school hours.

Studies have shown a strong linkage between young people’s hours of online social media and gaming using smartphones and other devices with compulsive “screen time immersion,” an addiction seen as a serious problem among the youth of today.

By restricting phone use during class, it is hoped that students will direct their attention to the subjects being taught and participate more fully in classroom activities.

A recent Pew Research Center survey revealed that over 95% of teenagers have access to smartphones, and 54% admit that giving up social media would be challenging.

Pew also reported that 72% of U.S. high school teachers say cellphone distraction is a significant problem in the classroom.

Back in the mid-70s, when I was in high school, you’d often see me walking the hallways and into classrooms with my Panasonic portable radio held in one hand and a stack of textbooks tucked under my arm.

During breaks in classroom instruction, my radio sometimes played the top hits from stations like WDGY and KDWB, filling the room with music, much to the appreciation of the other students, and at times triggering a raised eyebrow from the teacher.

Back then, if I had wanted to bring my phone into a classroom, it would have been attached to a mile-long telephone cord from my house.

Of course, we did have the payphone.


A picture from the 1975 Winsted Holy Trinity Yearbook
 shows a classmate was talking on the payphone
 next to the trophy case.