1,721,030 research outputs found
The study of body composition through DEXA: A prognostic tool to assess motor self-sufficiency recovery in geriatric rehabilitation
No full textIn order to identify the district values (youthful peak and senile threshold) of the lean mass (MM) and the compatible with motor autonomy lower limbs (Ai-mm), the body composition of 717 healthy and autonomous subjects, divided for gender, age and BMI has been previously evaluated. For both genders, Ai-mm has presented an overlapping distribution that, starting from a youthful peak, has shown an age-related decreasing until the same limit values, hypothesizable as motor autonomy threshold. Subsequently, 69 pathological subjects with acute motor pathology have been evaluated with DEXA. In the acute phase of the pathology a significant quantitative reduction of the total MM has been highlighted with a decreasing in representativity in Ai-mm and an increasing in Tr-mm. CC Monitoring (comparison between first and second DEXA evaluations) sequently highlights that functional recovery significantly correlates with the recovery of a proteical anabolism condition, while catabolic phase persistence characterizes the ultimate loss of self-sufficiency. Stress catabolism shows a behavior in the elderly patient as an accelerator of physiological senile involution of MM, reducing Ai-mm to values not compatible with the motor autonomy. However, functional recovery coincides with the anabolic phase and the restoration of a MM distribution. These values could form some reference targets for the prevention and/or treatment of forms of hypokinesia and motor disabilities and make the analysis of DC with DEXA useful for a quantitative assessment of the prognostically predictive reserve motor function of functional recovery potential
Dual energy X-ray absorptiometry (DEXA) evalution of age-related modifications in lean mass district distribution
No full textAim of the study was the measure of the modifications of total MM sex, age, and BMI-related; body composition was valued with DEXA in 717 healthy and autonomous subjects. It was estimated the district lean mass (MM) of superior limbs (As), inferior limbs (Ai) and of truncus (Tr), and calculated percentual distribution of the MM between Ai and Tr. Aging acts on body composition as a factor unbalancing force ratios between limbs and troncus, penalizing muscular representativeness of inferior limbs and favoring, on the contrary, an axial cargo progressively more onerous. That offers a possible bio-mechanical interpretation of motor frailty of agin
Dual energy X-ray absorptiometry (DEXA) evaluation of age-related acute pathologies modifications in lean mass district distribution
No full textAim of this study was to measure the modifications of total lean mass, sex age and body mass index (BMI) related in enderly patients. Distric lean mass was estimated in superior limbs, inferior limbs, truncus; percentual distribution of lean mass between inferior limbs and truncus was calculated. Ageing acts on body composition as a factor unbalancing force ratios between limbs and truncus, penalizing muscular representativeness of inferior limbs and favoring, on the contrary, an axial cargo pregressively more honerous. This offers a possible bio-mechanical interpretation of motor frailty in acute pathologies of aging
Well-posedness of the boundary layer equations
Full text linkWe consider the mild solutions of the Prandtl equations on the half space. Requiring analyticity only with respect to the tangential variable, we prove the short time existence and the uniqueness of the solution in the proper function space. The proof is achieved applying the abstract Cauchy-Kowalewski theorem to the boundary layer equations once the convection-diffusion operator is explicitly inverted. This improves the result of [M. Sammartino and R. E. Caflisch, Comm. Math. Phys., 192 (1998), pp. 433-461], as we do not require analyticity of the data with respect to the normal variable
On the Prandtl Boundary Layer Equations in Presence of Corner Singularities
No full textIn this paper we prove the well-posedness of the Prandtl boundary layer equations on a periodic strip when the initial and the boundary data are not assigned to be compatible
Well-posedness of Prandtl equations with non-compatible data
No full textIn this paper we shall be concerned with Prandtl's equations with incompatible data, i.e. with initial data that, in general, do not fulfil the boundary conditions imposed on the solution. Under the hypothesis of analyticity in the streamwise variable, we shall prove that Prandtl's equations, on the half-plane or on the half-space, are well posed for a short time
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Erythema nodosum: etiological factors and relapses in a retrospective cohort study.
No full textErythema nodosum (EN) is a septal panniculitis which may be associated with a wide variety of factors and disorders. In some patients it is recurrent, but few studies have considered recurrent EN. Our aim was to describe the causes of and diseases associated with EN and relapsing EN. Patients diagnosed with EN from 1997 to 2007 were included. EN was defined as post-infective, based on temporal, clinical, laboratory and microbiological criteria. Diagnosis of drug-induced EN was based on a temporal correlation, on the relapse of EN after drug re-introduction and on the absence of relapsing EN with a continuous treatment with the imputed drug. When the above criteria were excluded and EN was not associated with an underlying systemic disease or pregnancy, it was considered idiopathic.124 patients (mean age 39.5 years; median 37 years; range 4-90 years) were visited and re-evaluated after one to ten years (mean ± SD follow up time 5 ± 4 years). In 73 (58.8%) patients an aetiology of the first manifestation of EN was attributed to infections (25.8% of the total number; 32% of those with an attributed aetiology), drugs (mostly sex hormones; 15.3%; 26%), systemic diseases (11.2%; 19.2%) and pregnancy (6.5%; 10.9%). EN relapsed in 33 (26.6%) patients and was mostly attributed to infections and drugs. Factors responsible for the first manifestation of EN frequently differed from those causing relapses in the same patients, with the exception of drug-induced EN. We conclude that drug-induced EN can recur after re-exposure to the same drug, and the recurrence can be predicted
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