A ballpoint pen, also known as a biro, ball pen, or dot pen, is a pen that dispenses ink over a metal ball at its point, i.e., over a "ball point". The metals commonly used are steel, brass, or tungsten carbide. The design was conceived and developed as a cleaner and more reliable alternative to dip pens and fountain pens, and it is now the world's most-used writing instrument; millions are manufactured and sold daily. It has influenced art and graphic design and spawned an artwork genre.
The Federal Bureau of Investigation (FBI) is the domestic intelligence and security service of the United States and its principal federal law enforcement agency. An agency of the United States Department of Justice, the FBI is also a member of the U.S. Intelligence Community and reports to both the Attorney General and the Director of National Intelligence. A leading U.S. counterterrorism, counterintelligence, and criminal investigative organization, the FBI has jurisdiction over violations of more than 200 categories of federal crimes.
Forensic science, also known as criminalistics, is the application of science principles and methods to support legal decision-making in matters of criminal and civil law.
A fountain pen is a writing instrument that uses a metal nib to apply water-based ink, or special pigment ink—suitable for fountain pens—to paper. It is distinguished from earlier dip pens by using an internal reservoir to hold ink, eliminating the need to repeatedly dip the pen in an inkwell during use. The pen draws ink from the reservoir through a feed to the nib and deposits the ink on paper via a combination of gravity and capillary action. Filling the reservoir with ink may be achieved manually, via the use of an eyedropper or syringe, or via an internal filling mechanism that creates suction or a vacuum to transfer ink directly through the nib into the reservoir. Some pens employ removable reservoirs in the form of pre-filled ink cartridges.
A pen is a common writing instrument that applies ink to a surface, usually paper, for writing or drawing. Early pens such as reed pens, quill pens, dip pens and ruling pens held a small amount of ink on a nib or in a small void or cavity that had to be periodically recharged by dipping the tip of the pen into an inkwell. Today, such pens find only a small number of specialized uses, such as in illustration and calligraphy. Reed pens, quill pens and dip pens, which were used for writing, have been replaced by ballpoint pens, rollerball pens, fountain pens and felt or ceramic tip pens. Ruling pens, which were used for technical drawing and cartography, have been replaced by technical pens such as the Rapidograph. All of these modern pens contain internal ink reservoirs, such that they do not need to be dipped in ink while writing.
Stationery refers to commercially manufactured writing materials, including cut paper, envelopes, writing implements, continuous form paper, and other office supplies. Stationery includes materials to be written on by hand or by equipment such as computer printers.
A dip pen is a writing instrument used to apply ink to paper. It usually consists of a metal nib with capillary channels like those of fountain pen nibs, mounted in a handle or holder, often made of wood. Other materials can be used for the holder, including bone, metal and plastic; some pens are made entirely of glass.
László József Bíró, Hispanicized as Ladislao José Biro, was a Hungarian-Argentine inventor who patented the first commercially successful modern ballpoint pen. The first ballpoint pen had been invented roughly 50 years earlier by John J. Loud, but it was not a commercial success.
Capillary electrophoresis (CE) is a family of electrokinetic separation methods performed in submillimeter diameter capillaries and in micro- and nanofluidic channels. Very often, CE refers to capillary zone electrophoresis (CZE), but other electrophoretic techniques including capillary gel electrophoresis (CGE), capillary isoelectric focusing (CIEF), capillary isotachophoresis and micellar electrokinetic chromatography (MEKC) belong also to this class of methods. In CE methods, analytes migrate through electrolyte solutions under the influence of an electric field. Analytes can be separated according to ionic mobility and/or partitioning into an alternate phase via non-covalent interactions. Additionally, analytes may be concentrated or "focused" by means of gradients in conductivity and pH.
Roller ball pens or roll pens are pens which use ball point writing mechanisms with water-based liquid or gelled ink, as opposed to the oil-based viscous inks found in ballpoint pens. These less viscous inks, which tend to saturate more deeply and more widely into paper than other types of ink, give roller ball pens their distinctive writing qualities. The writing point is a tiny ball, usually 0.5 or 0.7 mm in diameter, that transfers the ink from the reservoir onto the paper as the pen moves.
A gel pen uses ink in which pigment is suspended in a water-based gel. Because the ink is thick and opaque, it shows up more clearly on slick surfaces than the typical inks used in ballpoint or felt tip pens. Gel pens can be used for many types of writing and illustration.
The BIC Cristal is an inexpensive, disposable ballpoint pen mass-produced and sold by Société Bic of Clichy, Hauts-de-Seine, France. It was introduced in 1950 and is the best-selling pen in the world, with the 100 billionth sold in September 2006. It has become the archetypal ballpoint pen and is considered ubiquitous, to the extent that the Museum of Modern Art has made it a permanent part of its collection. Its hexagonal form and design mimics a standard pencil and it is sold in six types of point and 18 colours around the world.
Shorttandemrepeat (STR) analysis is a common molecular biology method used to compare allele repeats at specific loci in DNA between two or more samples. A short tandem repeat is a microsatellite with repeat units that are 2 to 7 base pairs in length, with the number of repeats varying among individuals, making STRs effective for human identification purposes. This method differs from restriction fragment length polymorphism analysis (RFLP) since STR analysis does not cut the DNA with restriction enzymes. Instead, polymerase chain reaction (PCR) is employed to discover the lengths of the short tandem repeats based on the length of the PCR product.
A sequence determination is a type of examination conducted by a forensic document examiner. This type of forensic examination is done in an attempt to determine which of two events occurred first in the preparation of a document. Another term used for this type of examination is "sequence of intersections" since the evaluation requires intersection of physical materials on the document.
The Integrated Automated Fingerprint Identification System (IAFIS) is a computerized system maintained by the Federal Bureau of Investigation (FBI) since 1999. It is a national automated fingerprint identification and criminal history system. IAFIS provides automated fingerprint search capabilities, latent searching capability, electronic image storage, and electronic exchange of fingerprints and responses. IAFIS houses the fingerprints and criminal histories of 70 million subjects in the criminal master file, 31 million civil prints and fingerprints from 73,000 known and suspected terrorists processed by the U.S. or by international law enforcement agencies.
Since their invention and subsequent proliferation in the mid-20th century, ballpoint pens have proven to be a versatile art medium for professional artists as well as amateur doodlers. Ballpoint pen artwork created over the years have been favorably compared to art created using traditional art mediums. Low cost, availability, and portability are cited by practitioners as qualities which make this common writing tool a convenient, alternative art supply.
A retractable pen is a type of ink pen that has a spring-loaded ink cartridge which retracts and extends outside a protective housing. By clicking downward on the top of the pen, the tip is extended and locks in place at the bottom of the housing for use.
The Science and Technology Branch (STB) is a service within the Federal Bureau of Investigation that comprises three separate divisions and three program offices. The goal when it was founded in July 2006 was to centralize the leadership and management of the three divisions. The mission of the STB is discover, develop, and deliver innovative science and technology so that intelligence and innovative investigation is enhanced.
Apryll Marie Stalcup is an Irish chemist who is Professor and was the Director of the Irish Separation Science Cluster at Dublin City University. She was awarded the 2021 Chromatography Forum of the Delaware Valley Stephen Dal Nogare Award, the 2015 American Microchemical Society Benedetti Pichler Award and named in the 2016 Power List of the Top 50 Women Analytical Scientists worldwide. Her research considers surface-confined ionic liquids and chiral separations.
Charles A. Appel, Jr., known as the founder of the Federal Bureau of Investigation (FBI) Laboratory, was an FBI Special Agent from 1924 through 1948. Assigned in 1929 by then-Bureau of Investigation Director J. Edgar Hoover to coordinate outside experts for forensic examinations, Appel became the Bureau’s one-man forensic laboratory in 1931. In November 1932, the FBI’s Technical Laboratory was formally established. In August 1933, he began processing evidence and testifying on handwriting, typewriting, fingerprints, ballistics, and chemicals submitted by U.S. police agencies. Appel was joined in late 1933 by Special Agent Samuel F. Pickering, a chemist, and in 1934, by Special Agents Ivan W. Conrad and Donald J. Parsons, also scientists. In September 1934, the FBI Laboratory came to widespread attention due to Appel’s identification of Bruno Hauptmann as the kidnapper of Charles Lindbergh Jr., from hand-written ransom demand notes.
