a emph{signed graph} (or, in short, emph{sigraph}) $s=(s^u,sigma)$ consists of an underlying graph $s^u :=g=(v,e)$ and a function $sigma:e(s^u)longrightarrow {+,-}$, called the signature of $s$. a emph{marking} of $s$ is a function $mu:v(s)longrightarrow {+,-}$. the emph{canonical marking} of a signed graph $s$, denoted $mu_sigma$, is given as $$mu_sigma(v) := prod_{vwin e(s)}sigma(vw).$$the li...

In February 2008, a private physician in North Dakota radiographed hunterharvested venison and found that 60 of 100 packages contained metal fragments. This discovery had implications for public-funded venison donation programs, and it prompted several Midwest states to examine their programs. Approximately 500,000 deer hunters harvest >200,000 deer annually in Minnesota, and the state has a do...

One approach to locate the point of fire of a supersonic bullet is to first estimate the trajectory of the bullet and then trace the trajectory back to topographic or man-made obstructions on a digital map. The supersonic flight of a bullet generates a ballistic shock wave, and the trajectory of the bullet can be estimated by measuring the time delay between the shock wave arrivals at each sens...

A complex of polypeptides derived from a precursor is present on the surface of the malaria merozoite. During erythrocyte invasion only a small fragment from this complex is retained on the parasite surface and carried into the newly infected red cell. Antibodies to this fragment will interrupt invasion.

8159.2011.03112.x. [11] Sakellaridis T, Argiriou M, Panagiotakopoulos V, Charitos C. Bilateral sternobronchial fistula after coronary surgery—are retained epicardial pacing wires responsible. J Cardiothorac Surg 2009;4:26. [12] Horng GS, Ashley E, Balsam L, Reitz B, Zamanian RT. Progressive dyspnoea after CABG: complication of retained epicardial pacing wires. Ann Thorac Surg 2008;86:1352–4. [1...

Background. A stray bullet injury is defined as an accidental firearm injury occurring outdoors by an anonymous attacker. Stray bullet injuries are rare, but not uncommon in certain parts of the world. In Pakistan, 165 patients with stray bullet injuries were recorded between 2006 and 2010. Objectives. In Lebanon, gunshots may occur during politicians’ speeches, funerals and after exam results ...

A 66-year-old male presented with a three-month history of subacute painless decreased vision in the left eye. His ocular included complicated phacoemulsification surgery eye more than 20 years prior to presentation. Slit lamp examination revealed retained lens nuclear fragment superonasal quadrant. Surgical removal improved patient’s condition. The fragments were presumably lodged behind iris ...

The accurate determination of mass isotopomer distributions (MID) is of great significance for stable isotope-labeling experiments. Most commonly, MIDs are derived from gas chromatography/electron ionization mass spectrometry (GC/EI-MS) measurements. The analysis of fragment ions formed during EI, which contain only specific parts of the original molecule can provide valuable information on the...