Ka Chun Yu

  • Citations Per Year
Learn More
OBJECTIVE Respiratory papillomas (RP) tend to recur and the difficulty in eradicating the disease makes their treatment frustrating. Meticulous CO(2) laser excisions every 2 months has been the most effective treatment to date. This article analyzes the results of this plan in 244 patients with RP in the nose, nasopharynx, pharynx, hypopharynx, larynx,(More)
Even simple concepts in astronomy are notoriously difficult for the general public to understand . Many ideas involve three-dimensional (3D) spatial relationships among astronomical objects. However much of the traditional teaching materials used in astronomy education are twodimensional (2D) in nature, while studies show that visualising mental rotations(More)
We have observed the region around the HH 111 jet source with NICMOS onboard the Hubble Space Telescope, using two filters, F160W and F205W, which besides stellar continuum transmit the [FeII] 1.64 μm and H2 2.12μm emission lines, respectively. The jet can now be traced to within 2. 4 of the VLA source. In the F205W filter we detect for the first time the(More)
We have observed seven regions surrounding the driving sources of Herbig-Haro Ñows using the NICMOS infrared camera on board the Hubble Space Telescope. These Herbig-Haro energy sources, which power the HH 34, 47, 83, 111, 199, 300, and 454 Ñows, have all been previously detected in the centimeter-wavelength radio continuum. The regions were imaged in two(More)
Cerebellopontine angle (CPA) tumor surgery can produce a spectrum of sensory and motor deficits that can alter a patient's lifestyle and occupation. An important consideration is whether patients can return to full occupational status especially when hazardous duties are involved. Outcome data in CPA tumor surgery usually report that most patients are able(More)
We present new Hubble Space Telescope (HST ) NICMOS images of the source region of the HH 1/2 Ñow. The HH 1 jet is traced in the [Fe II] 1.64 km and the 2.12 km lines to about of the deeply H 2 2A.5 embedded VLA source. In general, the structure of the jet is similar in and [Fe II], with all the H 2 features having comparable brightness in both species.(More)
  • 1