Danny Barnhill

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Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 x 10(19) electron volts and the positions of active galactic nuclei (AGN) lying within approximately 75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these(More)
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from nu(tau) charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and(More)
The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the particle flux, J proportional, variantE;{-gamma}, at energies between 4 x 10;{18} eV and 4 x 10;{19} eV is 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) at(More)
The Pierre Auger Observatory [1] is being used to study cosmic rays with energies larger than 10 eV with unprecedented precision and statistics. An essential quantity that must be deduced from data is the lateral distribution function (LDF) that describes the decreasing of the signals in the watertanks as a function of distance. Knowledge of the LDF is(More)
PURPOSE From December 1983 through February 1992, a prospective study designed to determine the clinical course of patients with ovarian tumors of low malignant potential (LMP) was conducted by the Gynecologic Oncology Group (GOG). MATERIALS AND METHODS This protocol was developed to evaluate the following (1) the biologic behavior of ovarian LMP tumors,(More)
Thirty-five patients with invasive cervical carcinoma discovered in a uterus removed for benign indications were evaluated and treated from 1961 through 1983. Although formal staging was not possible, patients with presumed stage IA disease had a 100% five-year survival rate regardless of the addition of adjuvant therapy. All patients with more advanced(More)
From September 1971 through December 1982, 153 patients with Stage IB carcinoma of the cervix underwent radical hysterectomy and pelvic lymphadenectomy at two of the teaching hospitals of the Uniformed Services University of the Health Sciences. Records were retrospectively analyzed and independent pathologic review was performed. All surgical procedures(More)
An unusual case is presented of advanced dysgerminoma in a patient with Swyer syndrome, 46,XY pure gonadal dysgenesis. Unexpected regional invasion necessitated bowel resection, total abdominal hysterectomy, and bilateral salpingogonadectomy for a complete en bloc excision of the primary tumor mass and the dysgenetic gonads. This report illustrates the(More)
A survey of gynecologic oncologists was used to determine the optimum follow-up plan for asymptomatic, disease-free patients previously treated for a gynecologic malignancy. Ninety-four (91%) of 103 questionnaires were completed and returned. The majority of respondents recommended a clinic visit for these patients every 3 months for the first year after(More)
The second-look surgical reassessment is currently being performed on most patients with epithelial ovarian carcinoma after first-line chemotherapy if they are clinically free of disease. Ninety-six patients who underwent such procedures at Walter Reed Army Medical Center and the Naval Hospital, Bethesda, from January 1974 through May 1982 are reviewed. The(More)