Traditionally, matrix algebra in computer algebra systems is “implemented” in three ways: • numeric explicit computation in a special arithmetic domain: exact rational or integer, highprecision software floating-point, interval, or conventional hardware floating-point. • ‘symbolic’ explicit computation with polynomial or other expression entries, • (implicit) matrix computation with symbols def...

A 28-year-old woman presented at eight weeks and four days of gestation, according to her menstrual dates, complaining of painless vaginal bleeding for three days. Her urinary pregnancy test was positive. Initial transvaginal ultrasound demonstrated an irregular complex structure with a fluid filled centre in the right adnexum. Despite the diagnosis of a possible underlying unruptured right tub...

A 66-year-old woman with a history of hypertension and persistent atrial fibrillation was referred to the Arrhythmia Clinic. Before her visit, a routine 12-lead ECG was ordered (Figure 1). The patient was asymptomatic except for minor palpitations. Her medicine regimen included apixaban, flecainide 150 mg twice daily, lisinopril, loratadine, metoprolol, and simvastatin. What is the cardiac rhyt...

The author of this paper started a research diary to provide transparency to her study and to help her clarify thoughts and feelings--as well as to acknowledge factors that may have influenced her analysis. She found it helped in her development as a novice phenomenological nurse researcher through creative and critical thinking. She recommends all novice researchers keep a diary.

The aim of this study was to investigate the effectiveness of a new experimental complex in diets of lactating cows. The scientific and economic experiments were conducted in conditions of a large industrial complex for milk production from cows of Holstein breed (Russia). Four groups of Holstein cows (third calving), 20 animals each, were formed to conduct an analog method research. The cows i...

we characterize compact composition operators on real banach spaces of complex-valued bounded lipschitz functions on metric spaces, not necessarily compact, with lipschitz involutions and determine their spectra.

By Surgn.-Major T. R. Macdonald, m.b., l.e.c.s., Edin ?om notes by Asst.-Surgn. Upendra Naryan Rai.) v jt Two Cases Of Ovarian Tumour?Operation Recovery.?Jamni, a Hindu female, a<*ed about 45 years, admitted on the 2nd November 1894 for ovarian tumour. She was the mother of eight children, of whom five are still living, the youngest being eight years of age. Since the birth of her last child, s...

Photometric observations have been made of 36 stars classified as CST or CST: in the General Catalogue of Variable Stars. Six of these stars are found to vary and three others were deemed possible variables. Of the certain variables, two (MR Her and TY Sge) are red pulsators, one (V1585 Cyg) is a rapid irregular variable, one is apparently a short period Cepheid-strip star (V432 Oph), one is an...

Membrane transport is an essential component of pathogenesis for most infectious organisms. In African trypanosomes, transport to and from the plasma membrane is closely coupled to immune evasion and antigenic variation. In mammals and fungi an octameric exocyst complex mediates late steps in exocytosis, but comparative genomics suggested that trypanosomes retain only six canonical subunits, im...