Abstract Introduction 6% of all inguinal hernias are scrotal in high-resource countries rising to 67% low-resource countries. This represents a heavy disease burden on relatively young men during their most productive period life. Despite limited evidence these guidelines aim improve treatment for hernia patients. Methods After developing 19 key questions systematic literature review was perfor...

ABSTRACT We present time series analyses of three-decade long radio observations the BL Lacertae object AO 0235+164 made at University Michigan Radio Astronomical Observatory operating three central frequencies 4.8, 8.0, and 14.5 GHz. detected a quasi-periodic oscillation ∼965 d in all frequency bands light curve effectively simultaneous observations, along with strong signals ∼1950, ∼1350, ∼66...

An unusual event of rapid flux density variations (with a timescale of ∼4 days) observed at 1.49, 4.86 and 8.44 GHz in the highly variable BL Lac object AO 0235+164 is analysed. The distinct properties of the burst are: (1) the flux density reached its maximum at 1.49 GHz earlier than at 4.86 and 8.44 GHz; (2) the duration of the burst decreased with decreasing frequency; (3) the variability am...

The long-term variability of the multiwavelength blazar emission can be interpreted in terms of orientation variations of a helical, inhomogeneous, non-thermally emitting jet, possibly caused by the orbital motion of the parent black hole in a binary system (Villata & Raiteri 1999). The helical-jet model is here applied to explain the quasi-periodic radio-optical light curves and the broad-band...

Comprehensive VLBI and multi-waveband monitoring indicate that a single superluminal knot can cause a number of γ-ray flares at different locations. However, the often very rapid variability timescale is a challenge to theoretical models when a given flare (perhaps the majority of those observed) is inferred from observations to lie near the 43 GHz core, parsecs from the central engine. We pres...