Brain tumors with symptomatic onset in the first two years of life

Eighty children who in the first 2 years of life had signs and symptoms relating to a cerebral neoplasm were studied over an 18-year period (1970-1987), the mean follow-up being 8.2 years. In each case age at onset, clinical presentation, tumor location and pathological diagnosis, extent of surgical resection, postoperative mortality, adjuvant therapy length of survival and quality of life were assessed. Supratentorial tumors (59%) were more common than infratentorial. The most frequent clinical presenting feature (70%) was increased intracranial pressure. Sixty-three patients (79%) were operated on and in all of these cases a histological diagnosis was obtained. Astrocytomas (41%) and medulloblastomas (20%) were the most common oncotypes. Surgical mortality was 17.4% and the 5-year survival rate was 54%. Quality of life was assessed for all long-term surviving patients using a specifically designed protocol. Normal physical and intellectual performances were found in 46% of cases, and all together 75% of the patients had sufficient autonomy in daily life. The prognosis is more closely related to tumor location and type of treatment than to histological diagnosis or age at onset.     

Various personality traits of patients with psoriatic arthropathy

It is well known that patients affected by rheumatic diseases may present specific pathological trends in personality structure, as has been extensively reported in literature. Our study was aimed at investigating several aspects of the personality traits of 20 patients with psoriatic arthropathy, compared with a group of 20 patients with rheumatoid arthritis. All patients were evaluated with appropriate rating scales assigned in auto and hetero-administration. The study results points to a personality trait disturbance in psoriatic arthritis patients, which can be clearly differentiated from the anxious habitus and/or reactive-depressive state observed in patients with rheumatoid arthritis.     

The catalepsy test: Its ups and downs.

The typical catalepsy (CPSY) test consists of placing an animal in an unusual posture and recording the time taken to correct this posture. This time is regarded as an index of the intensity of CPSY. CPSY is a robust behavior, and the lack of standardization does not usually hinder its actual detection. However, the intensity of the cataleptic effect is influenced by minor methodological differences, and interpretation and comparison of results across laboratories are difficult. The behavioral CPSY test can use any of several different apparatus, including wire grids, parallel bars, platforms, or pegs, to situate the animals in unusual positions. The most common is the bar test (BT), and despite its wide use in psychopharmacological research, even parameters of this test are not standardized. The present article reviews parameters chosen by investigators that measure CPSY. The methodological issues of repeated testing, scaling of scores, apparatus, animal weight, maximal test duration, behavioral criteria, and other influences are discussed. A brief review of the neuropharmacological basis of CPSY is included. It is argued that a universal, standardized BT be adopted by researchers. New data on a novel automated BT in the Digiscan Activity Monitoring System is presented. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Paraprofessional skill: Maintenance of empathic sensitivity after training.

Investigated changes in empathic sensitivity in paraprofessionals as a result of training and examined the maintenance of changes 6–24 mo after training. Also explored was the relationship of verbal intelligence to changes. 47 students in an associate degree mental health/human service program participated. Each S completed a 10-wk training course in 1 of 4 groups. Each was given the Recognition Assessment—Empathy (RA—E) on completion of the course and 6–24 mo later. Ss in 2 groups were also pretested on the RA—E. Empathetic sensitivity did increase after the course, confirming previous research, and changes were not only maintained but increased over time to a level comparable with a normative group of experienced clinicians. Course drop-out and selection effects were judged to be minimal. No significant relationship emerged between verbal intelligence and empathic sensitivity either before or after training. (15 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

On the role of surface functional groups in Pt carbon interaction

The interaction between platinum crystallites and surface functional groups of carbon in a homologously prepared series of Pt/C catalysts for phosphoric acid fuel cell (PAFC) applications has been studied by X-ray photoelectron spectroscopy (XPS) and potentiometric titration techniques. It has been found that the platinum surface area depends on the amount of oxygenated groups on the carbon support. In addition, relationships between the platinum electroactive surface area and the acid-base nature of support functionalities have been found. The carbon support functional groups have been shown to affect the electronic nature of the platinum states.     

Experimental modal analysis of an aircraft model wing by embedded fiber Bragg grating sensors

A critical issue in practical structural health monitoring is related to the capability of proper sensing systems integrated within the host structures to detect, identify, and localize damage generation. To this aim, many techniques have been proposed involving dynamic measurements such as modal analysis, acoustic emission, and ultrasonics. This paper relies on the use of embedded fiber Bragg grating sensors for performing an experimental modal analysis on a wing of an aircraft model. Time domain response of the embedded fiber-optic sensors induced by hammer impacts were acquired and transformed into the frequency domain. Using a classical technique based on the frequency transfer function, the first displacement and strain mode shapes of the wing have been retrieved in terms of natural frequencies and amplitudes. Experimental results confirm the excellent performances of this class of sensing devices to determine the modal behavior within complex structures compared with conventional accelerometer-based detection systems.