Rodrigo Aquino Castro

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In this paper we present a general methodology to solve a wide variety of classical lattice path counting problems in an uniform way. These counting problems are related to Dyck paths, Motzkin paths and some generalizations. The methodology uses weighted au-tomata, equations of ordinary generating functions and continued fractions. It is a variation of the(More)
Uterine leiomyoma is the most frequent pelvic tumor found in female genital tract. Some studies have suggested an association between single nucleotide polymorphisms (SNPs) in estrogen receptors genes with susceptibility in developing uterine leiomyoma. In this work, we estimated the frequency of two SNPs: one located in the intron 1 (rs9322331) and other(More)
Vigilance or scanning involves interruptions in foraging behavior when individuals lift their heads and conduct visual monitoring of the environment. Theoretical considerations assume that foraging with the "head down", and scanning ("head up") are mutually exclusive activities, such that foraging precludes vigilance. We tested this generalization in a(More)
Group living is thought to evolve whenever individuals attain a net fitness advantage due to reduced predation risk or enhanced foraging efficiency, but also when individuals are forced to remain in groups, which often occurs during high-density conditions due to limitations of critical resources for independent breeding. The influence of ecological(More)
PURPOSE To compare the effectiveness of pelvic floor exercises, electrical stimulation, vaginal cones, and no active treatment in women with urodynamic stress urinary incontinence. PATIENTS AND METHODS One hundred eighteen subjects were randomly selected to receive pelvic floor exercises (n=31), ES (n=30), vaginal cones (n=27), or no treatment (untreated(More)
While ecological causes of sociality (or group living) have been identified, proximate mechanisms remain less clear. Recently, close connections between sociality, glucocorticoid hormones (cort) and fitness have been hypothesized. In particular, cort levels would reflect a balance between fitness benefits and costs of group living, and therefore baseline(More)
Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality.(More)
AIMS We hypothesize that the expression of genes encoding vaginal smooth muscle (SM) contractile proteins is altered in patients with pelvic organ prolapse (POP) and is influenced by age and menopausal status. We aim to analyze the expression of SM-myosin heavy chain (MHY11), caldesmon (CALD1), SM gamma-actin (ACTG2), and tropomyosin (TPM1), in(More)
OBJECTIVE Verify the association between genital prolapse, other risk factors and a polymorphism in exon 31 of the collagen III-a1 gene (COL3A1). SETTING The etiology of genital prolapse is multifactorial, and genetic defects have been proposed. Also, there is evidence that changes in collagen may be responsible for defects in pelvic floor support. The(More)
AIMS The aim of the study was to compare the effect of hypopressive exercises including pelvic floor muscle contraction, pelvic floor muscle training (PFMT) alone and control on pelvic floor muscle function in women with pelvic organ prolapse (POP). METHODS Fifty-eight women with a mean age of 55.4 (± 9.8) years old with stage II POP were randomly(More)