The purpose of this article is to highlight the importance of including cosmetic body-piercing and tattooing in HIV prevention and education. Little information about risks associated with tattoos or having one's body pierced is evident in the health promotion and disease prevention literature, particularly among adolescents, ethnic groups, and incarcerated populations. It is incumbent that pre...

We consider the p-piercing problem for axis-parallel rectangles. We are given a collection of axis-parallel rectangles in the plane, and wish to determine whether there exists a set of p points whose union intersects all the given rectangles. We present eecient algorithms for nding a piercing set (i.e., a set of p points as above) for values of p = 1; 2; 3; 4; 5. The result for 4 and 5-piercing...

The complexity of two related geometrical (indeed, combinatorial) problems is considered, measured by the number of queries needed to determine the solution. It is proved that one cannot check in a linear in N number of queries whether N intervals cover a whole interval, or whether for N pairs of intervals on two lines there is a pair of points intersecting each of these pairs of intervals (" p...

Today’s unmanned aerial vehicles are being utilized by numerous groups around the world for various missions. Most of the smaller vehicles that have been developed use commercially-off-the-shelf parts, and little information about the performance characteristics of the propulsion systems is available in the archival literature. In light of this, the aim of the present research was to determine ...

This paper proposes a thrust estimation scheme for marine propellers in four-quadrant operations. To calculate the thrust and torque coefficients of screw propeller in four-quadrant, a Chebyshev fit expression of the propeller properties in four-quadrant for surface vessel is given, and then it is changed into an ordinary polynomial expression. These expressions are suitable for calculating the...

BACKGROUND Body piercing has become increasingly popular throughout the world and may cause unanticipated complications during surgery. METHODS We describe the case of a 35-y-old woman with hepatocellular carcinoma who underwent a diagnostic laparoscopy for metastatic disease evaluation. RESULTS An early intestinal injury occurred upon abdominal entry and introduction of pneumoperitoneum. ...

Ear piercing is a well-established cultural and fashion-related practice from ancient times. Most people do not realize the common complications involved: contact dermatitis, keloid formation, infection, lobular tissue loss from trauma, and tearing of the earlobe, most commonly from repeated mechanical stress from heavy earrings. Torn earlobes are also referred to as cleft or split earlobes. Sp...

this paper describes a contra-rotating propeller (crp) system to calculate the hydrodynamic characteristics and then design the optimum operational condition to be installed on two different large bulk carriers and vlcc. the method is based on boundary element method (bem) to obtain the hydrodynamic performance of any complicated configuration such as crp system, and then the optimum propeller ...

Potential relationships between the development of nickel allergy and previous ear piercing or orthodontic treatment with nickel-containing appliances were studied in 294 patients. We found 77 (31.2%) of 247 patients with pierced ears were allergic to nickel compared to only three (6.4%) patients without pierced ears (p = 0.001), which confirms earlier suggestions that nickel allergy (as assess...

This paper investigates the influence of the propeller on the drag of twin self-propelled AUVs, firstly, to examine the fleet performance for various propulsive conditions of leading and following AUV and, secondly, to study the parametric influence of transverse separations and longitudinal offsets on the fleet’s drag. A series of CFD RANS-SST simulations have been performed at the Reynolds Nu...