Binary mass ratios: system mass not primary mass

Binary mass ratios: system mass not primary mass

Binary properties are usually expressed (for good observational reasons) as a function of primary mass. It has been found that the distribution of companion masses – the mass ratio distribution – is different for different primary masses. We argue that system mass is the more fundamental physical parameter to use. We show that if system masses are drawn from a log-normal mass function, then the...

Bayesian Mass Spectra Peak Alignment from Mass Charge Ratios

Proteomics studies based on mass spectrometry (MS) are gaining popular applications in biomedical research for protein identification/quantification and biomarker discovery, especially for potential early diagnosis and prognosis of severe disease before the occurrence of symptoms. However, MS data collected using current technologies are very noisy and appropriate data preprocessing is critical...

Primary Amenorrhea with Nonspecific Pelvic Mass: A Rare Case Report

 Menstrual disorders are common in puberty, but they are of great concern to patients when presented with primary amenorrhea. This paper reports the case of a 17-year-old single female with secondary sexual characteristics and a suspicious mass in pelvic floor. She also complained from chronic pelvic pain. In laboratory tests, the hormone levels were normal and ultrasound scan showed a 50 to 89...

Pediatric Neck Mass

Introduction  Neck masses include a wide variety of diagnostic possibilities, with more than 60 etiologies that depend on clinical aspects such as age, location and time of disease progression. The interview and physical examination guide research that cross the neck masses in pediatric patients in 3 groups: infectious / inflammatory, and neoplastic embryonic remnants. The aim of this study was...

Mass Measles Vaccination