The Art of Coding Theory

When one hears the word code , pictures of computers, zeros and ones, and ciphers are most likely the things that come to mind. The Webster definition of code is a system of signals used to represent letters or numbers in transmitting messages. Coding is simply defined as converting ordinary language into code. If these definitions were taken literally, the entire branch of mathematics could be placed under coding. In mathematics, we take ordinary language and convert it into symbols such as t and s. Thus the statement Sally\u27s age is six years fewer than twice that of Tim\u27s was to be written mathematically, it would be presented something like s=2t-6. Here s and t are symbols used to represent Sally\u27s and Tim\u27s ages respectively, while = symbolizes is and - denotes fewer than . Although this example is rather elementary, it nonetheless portrays how coding is used in mathematics as a means of convenient symbolizing

Wooden Bridge Demolition and Reconstruction

The Conejo Recreation and Park District (CRPD) is a nonprofit city government organization that maintains the parks and hiking trails in Thousand Oaks, California. They were informed that one of the bridges at the Stagecoach Inn, a landmark park located in Thousand Oaks California, was old and sagging in a way that made interfered with the flow of the creek it spanned over. A plan to demolish the current bridge was created. Utilizing ArchiCAD and Microsoft Excel a design and an estimate were developed for a new bridge that would be built in its place. This bridge would be tall enough to allow for ample room for the creek to flow beneath it. During the Winter of 2019, a team of volunteers and two CRPD Rangers demolished the old bridge, cleared and grubbed the area to allow for more water to pass underneath the new bridge, and prepared the site for the construction of the new bridge. The following day materials were procured to construct the new bridge and the bridge was constructed and erected behind the Stagecoach Inn. This paper reviews the process of bridge replacement, including the design, the demolition, and the construction

Nontyphoidal salmonella bacteremia resulting in thoracic aortic dissection

An 84-year-old male retired boilermaker, residing in Australia, presented with the acute onset of anterior, left-sided, pleuritic chest pain. He had a history of ischemic heart disease, and had been on a long-haul flight, returning from Mauritius 9 days previously

Senior Recital: Simon Needle, guitar

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Performance. Mr. Needle studies guitar with Trey Wright.https://digitalcommons.kennesaw.edu/musicprograms/2144/thumbnail.jp

Birds of a Feather? : Magellan/IMACS spectroscopy of the ultra-faint satellites Grus II, Tucana IV, and Tucana V

We present Magellan/IMACS spectroscopy of three recently discovered ultra-faint Milky Way satellites, Grus II, Tucana IV, and Tucana V. We measure systemic velocities of vhel =- 110.0 0.5 - km s 1 , = - + vhel 15.9 1.7 1.8 - km s 1, and = - - + vhel 36.2 2.2 2.5 - km s 1 for the three objects, respectively. Their large relative velocities demonstrate that the satellites are unrelated despite their close physical proximity. We determine a velocity dispersion for Tuc IV of s = - + 4.3 1.0 1.7 - km s 1 , but we cannot resolve the velocity dispersions of the other two systems. For Gru II, we place an upper limit (90% confidence) on the dispersion of σ < 1.9 - km s 1, and for Tuc V, we do not obtain any useful limits. All three satellites have metallicities below [Fe H 2.1 ] = - , but none has a detectable metallicity spread. We determine proper motions for each satellite based on Gaia astrometry and compute their orbits around the Milky Way. Gru II is on a tightly bound orbit with a pericenter of - + 25 7 6 kpc and orbital eccentricity of - + 0.45 0.05 0.08. Tuc V likely has an apocenter beyond 100 kpc and could be approaching the Milky Way for the first time. The current orbit of Tuc IV is similar to that of Gru II, with a pericenter of - + 25 8 11 kpc and an eccentricity of - + 0.36 0.06 0.13. However, a backward integration of the position of Tuc IV demonstrates that it collided with the Large Magellanic Cloud at an impact parameter of 4 kpc ∼120 Myr ago, deflecting its trajectory and possibly altering its internal kinematics. Based on their sizes, masses, and metallicities, we classify Gru II and Tuc IV as likely dwarf galaxies, but the nature of Tuc V remains uncertain

Fingerprints Of Election Theft: Were Competitive Contests Targeted?

In this report, we describe results from a telephone poll conducted the night of the national election of November, 2006. The poll methodology was explicitly designed to detect partisan manipulation of the vote count, and to separate evidence for manipulation from poll sampling bias. Our premise was that politically motivated tampering would target races that were projected to be competitive, while the perpetrators would be less motivated to interfere in races that were not projected to be close. Designing our poll to be maximally sensitive to such a pattern, we selected 16 counties around the country where, of the three most prominent races (Governor, Senator or US House), there was at least one competitive contest and one noncompetitive contest. In our study, the responses of the same group of respondents were compared to official election results for pairs of races, one competitive and one noncompetitive. We used paired data analysis to compare discrepancies between poll and official count for these matched pairs. Our results revealed much larger discrepancies in competitive than in noncompetitive races (

PinR mediates the generation of reversible population diversity in Streptococcus zooepidemicus

Opportunistic pathogens must adapt to and survive in a wide range of complex ecosystems. Streptococcus zooepidemicus is an opportunistic pathogen of horses and many other animals, including humans. The assembly of different surface architecture phenotypes from one genotype is likely to be crucial to the successful exploitation of such an opportunistic lifestyle. Construction of a series of mutants revealed that a serine recombinase, PinR, inverts 114 bp of the promoter of SZO_08560, which is bordered by GTAGACTTTA and TAAAGTCTAC inverted repeats. Inversion acts as a switch, controlling the transcription of this sortase-processed protein, which may enhance the attachment of S. zooepidemicus to equine trachea. The genome of a recently sequenced strain of S. zooepidemicus, 2329 (Sz2329), was found to contain a disruptive internal inversion of 7 kb of the FimIV pilus locus, which is bordered by TAGAAA and TTTCTA inverted repeats. This strain lacks pinR and this inversion may have become irreversible following the loss of this recombinase. Active inversion of FimIV was detected in three strains of S. zooepidemicus, 1770 (Sz1770), B260863 (SzB260863) and H050840501 (SzH050840501), all of which encoded pinR. A deletion mutant of Sz1770 that lacked pinR was no longer capable of inverting its internal region of FimIV. The data highlight redundancy in the PinR sequence recognition motif around a short TAGA consensus and suggest that PinR can reversibly influence the wider surface architecture of S. zooepidemicus, providing this organism with a bet-hedging solution to survival in fluctuating environments