Reynolds stress scaling in pipe flow turbulence-first results from CICLoPE.

This paper reports the first turbulence measurements performed in the Long Pipe Facility at the Center for International Cooperation in Long Pipe Experiments (CICLoPE). In particular, the Reynolds stress components obtained from a number of straight and boundary-layer-type single-wire and X-wire probes up to a friction Reynolds number of 3.8×104 are reported. In agreement with turbulent boundary-layer experiments as well as with results from the Superpipe, the present measurements show a clear logarithmic region in the streamwise variance profile, with a Townsend-Perry constant of A2≈1.26. The wall-normal variance profile exhibits a Reynolds-number-independent plateau, while the spanwise component was found to obey a logarithmic scaling over a much wider wall-normal distance than the other two components, with a slope that is nearly half of that of the Townsend-Perry constant, i.e. A2,w≈A2/2. The present results therefore provide strong support for the scaling of the Reynolds stress tensor based on the attached-eddy hypothesis. Intriguingly, the wall-normal and spanwise components exhibit higher amplitudes than in previous studies, and therefore call for follow-up studies in CICLoPE, as well as other large-scale facilities.This article is part of the themed issue 'Toward the development of high-fidelity models of wall turbulence at large Reynolds number'.

Effect of nonsurgical periodontal therapy on serum and gingival crevicular fluid cytokine levels during pregnancy and postpartum.

BACKGROUND AND OBJECTIVE: A low-grade systemic inflammatory status originating from periodontal infection has been proposed to explain the association between periodontal disease and systemic conditions, including adverse obstetric outcomes. The aim of this study was to evaluate the effect of periodontal therapy during pregnancy on the gingival crevicular fluid and serum levels of six cytokines associated with periodontal disease and preterm birth. MATERIAL AND METHODS: A subsample of 60 women (18-35 years of age) up to 20 gestational weeks, previously enrolled in a larger randomized clinical trial, was recruited for the present study. Participants were randomly allocated to receive either comprehensive nonsurgical periodontal therapy before 24 gestational weeks (n = 30, test group) or only one appointment for supragingival calculus removal (n = 30, control group). Clinical data, and samples of blood and gingival crevicular fluid, were collected at baseline, at 26-28 gestational weeks and 30 d after delivery. The levels of interleukin (IL)-1ß, IL-6, IL-8, IL-10, IL-12p70 and tumor necrosis factor-α were analyzed by flow cytometry. RESULTS: After treatment, a major reduction in periodontal inflammation was observed in the test group, with bleeding on probing decreasing from 49.62% of sites to 11.66% of sites (p < 0.001). Periodontal therapy significantly reduced the levels of IL-1ß and IL-8 in gingival crevicular fluid (p < 0.001). However, no significant effect of therapy was observed on serum cytokine levels. After delivery, the levels of IL-1ß in the gingival crevicular fluid of the test group were significantly lower than were those in the control group (p < 0.001), but there were no significant differences between test and control groups regarding serum cytokine levels. CONCLUSION: Although periodontal therapy during pregnancy successfully reduced periodontal inflammation and gingival crevicular fluid cytokine levels, it did not have a significant impact on serum biomarkers.

Measuring dyspepsia: a new severity index validated in Bologna.

BACKGROUND: Measurement of the severity of dyspepsia symptoms before and after treatment and determining what is a significant change is a major problem in designing dyspepsia treatment studies. OBJECTIVES: To assess the reproducibility, validity and responsiveness to treatment of a dyspepsia questionnaire to be used in clinical and population-based studies. METHODS: Seventy-three dyspeptic patients (35 male, 38 female; mean age 52 years) and 75 healthy volunteers (32 male, 43 female; mean age 52 years) were included. Subjects were interviewed for the presence/absence and severity/frequency of 19 gastrointestinal symptoms. Severity was measured on a 5-point scale. Frequency was also recorded on a 5-point scale. A global symptom index (severity x frequency) was calculated for the eight most severe symptoms; a mean global symptom index (8-MGSI) was considered for the evaluation of the instrument. To evaluate intra-observer variation, one author interviewed subjects (T0) and then repeated the interview 1 week later (T1). For inter-observer variation, two authors interviewed patients. VALIDITY was measured by comparing 8-MGSI of the dyspepsia patients to those of healthy volunteers. Responsiveness was assessed by comparing mean global symptom index before and 1 month after appropriate therapy. RESULTS: Reproducibility: The mean 8-MGSI was 4.5 at T0 and 3.7 at T1 with a correlation coefficient of 0.62. As for inter-observer variation, the average 8-MGSI was 4.8 by the first author and 3.9 by the second with a correlation coefficient of 0.60. VALIDITY: The mean 8-MGSI was, respectively, 1.4 in healthy volunteers and 4.8 in dyspeptic patients (p = 0.001). Responsiveness: After treatment, a significant improvement in 8-MGSI was detected (p = 0.001). CONCLUSIONS: This questionnaire is a reliable, valid and responsive instrument for measuring the presence, severity and frequency of dyspepsia.

Validation of an Italian version of the Fibromyalgia Impact Questionnaire (FIQ-I).

OBJECTIVE: To validate a translated Italian version of the Fibromyalgia Impact Questionnaire (FIQ). METHODS: The Italian version of the FIQ was administered to 50 patients affected by fibromyalgia (FM) (48 patients filled out the questionnaire again 10 days later) together with the Italian version of the Stanford Health Assessment Questionnaire (HAQ), the Medical Outcomes Survey Short Form-36 (SF-36), and a tender point count (TPC) obtained by summing the score (0-3) of each tender point tested by thumb palpation. All patients were asked about the severity of pain today (10 cm visual analog scale) and the duration of symptoms. Test-retest reliability was assessed using Spearman correlations. Internal consistency was evaluated with Cronbach's alpha of reliability. Construct validity of the FIQ was evaluated by correlations between the HAQ and subscales of the SF-36 as well as the TPC. RESULTS: The mean duration of symptoms was 6.5 years and the mean age of the participants was 57.4 years. Test-retest reliability was between 0.74 and 0.95 for physical functioning as well as for the total FIQ and other components. Internal consistency was 0.90 for the overall FIQ. Significant correlations were obtained between the FIQ items, the HAQ and the SF-36. CONCLUSIONS: The Italian FIQ is a reliable and valid instrument for detecting and measuring functional disability and health status in Italian patients with FM.

Isolated office hypertension: are there any markers of future blood pressure status?

BACKGROUND: The introduction of ambulatory blood pressure monitoring into clinical practice has defined a clinical condition called 'isolated office hypertension'. OBJECTIVE: The aim of this study was to evaluate the long-term systolic and diastolic blood pressure changes in patients with isolated office hypertension and to identify the presence of markers capable of identifying which patients will develop sustained hypertension. METHODS: All the 407 patients enrolled had a random office systolic or/and diastolic blood pressure of over 140/90mmHg and a mean daytime ambulatory blood pressure of 130/84mmHg or less. At enrollment, each patient underwent a 'baseline examination' made up of a physical evaluation, a 24h ambulatory blood pressure monitoring, and a mental arithmetic test performed at the end of the 24h ambulatory monitoring. RESULTS: Of the 173 patients finally studied, 102 (58.9%) developed sustained hypertension with an increase in both ambulatory systolic and diastolic blood pressure. At the time of the baseline examination, the patients were divided into two groups. Group A included patients with mean ambulatory systolic and diastolic blood pressures in the first hour of 130/84mmHg or less; group B included patients with mean ambulatory systolic and diastolic pressures in the first hour of greater than 130/84mmHg. During the mental arithmetic test, the systolic and heart rate values increased significantly only in group B patients. Of the 102 patients who had become hypertensive by the time of the follow-up examination, 84 (82%) belonged to group B. CONCLUSION: These data suggest that isolated office hypertension may indeed be a transitional state towards the development of sustained hypertension. Moreover, the mean ambulatory blood pressure value during the first hour can be considered to be a marker of a higher risk of developing sustained hypertension.

[Rehabilitation of deafness in the elderly: multidisciplinary intervention in experimental university center]. / La riabilitazione nella sordità dell'anziano: intervento multidisciplinare in un centro universitario sperimentale.

The loss of hearing abilities can be seen as a complex event because psychological discomfort and relational inhibitions interact and lead to behaviours and attitudes which are insidious and dangerous for the quality of life of the patient. The complexity of the psychological-organic inconvenience, such as impairement disability and handicap led to the testing of recovery patterns. In this specific context interventions coming from different fields sustained from a complex operative model where different professional competences and evaluation processes interact. Therapeutic interventions have been carried out by an audiologist, an audiometrist, a speech therapist, an audioprostethist and a psychologist, all sharing the obtaining of the same result. The role of the audiologist is simply clinical and concerns the knowledge of the entire process of rehabilitation through the use of a prosthesis. This process concerns the audiologist, who operates in close collaboration with the audiometrist and the audioprosthesist: it is therefore a therapeutic activity that is interested mainly in the prescription of the prosthesis and the restoring of the communicative function. The speech therapist and the psychologist carry their interventions through a relationship with the patient, which places the respect of the patient's personality before any other procedural and technical aspect. Therefore they pay attention more to ergonomic factors than to the hearing loss, through the obtaining of the patient's self-confidence and of a better general psychological situation. Therefore the main purpose of each intervention is to create a process of rehabilitation aimed at restoring the communicative functions and the individual motivation in trying to do so both in the domestic and in the social environment. The authors refer the experience and the informations put together during three years of research activity. The results of the therapeutic intervention have brought to the acceptance of the prosthesis help, the adaptation to amplification, the reduction of the subjective and relational uneasiness for the use of prosthesis, the use of the prosthesis, the reintroduction to the world of sounds, the restoring of levels of autonomy and of self-estime, the discover of eventual abilities, which had never been used or underestimated, the reactivation of more rewarding social relationships and the reduction of the conditions of dependency related to the hearing disability.