39 research outputs found
Investigation of magnetic properties of magnetostrictive materials and constructional steel
No full textW artykule zaprezentowano podstawowe właściwości wybranych metod analizy sygnałów
odkształconych. Przedstawiono w nim wyniki eksperymentu pomiarowego
zmierzającego do wskazania przyczyn uszkodzenia konstrukcji silnika napędzającego
prasę wykrawającą o nacisku 250 ton. Analizę przeprowadzono korzystając z metody
ODS oraz krótkoczasowej transformaty Fouriera. Wykazano, że synergia różnych metod
pomiaru i analizy drgań poprawia możliwości właściwej oceny stanu technicznego
maszyny.In the article basic properties of chosen analysis methods of deformed signals were
presented. The presented method was used to analyze the causes of failure of the
induction motor. This engine powered punching press with a pressure of 250 tons. The
analysis was conducted using the Operating Deflection Shape method (ODS) and Short
Time Fourier Transform (STFT). It has been shown that the synergy of different
methods of measurement and analysis of vibrations improves the possibility of a proper
assessment of the technical condition of the machine
A consideration of rainfall, runoff and losses at Plynlimon in the context of hydrological variability in the UK and maritime western Europe
No full textImportant questions concerning the resilience of current water management strategies have been raised by the recent volatility of climatic conditions across large parts of western Europe. The last decade, overall, has been exceptionally warm and there have been very large spatial and temporal variations in rainfall, river flows and aquifer recharge rates. Examination of historical rainfall and runoff records for parts of maritime western Europe confirms that there is no close modern parallel to the conditions experienced recently. Some-but far from complete-consistency with a number of favoured climate change scenarios may be recognised.
Analyses of recent trends in lengthy rainfall and runoff series for the UK demonstrate significant regional differences and provide conflicting signals especially in relation to trends in catchment losses. Difficulties in reconciling the results from different areas may reflect both real hydroclimatological differences between catchments and variations in the precision of hydrometric time series-uncertainties in the assessment of areal precipitation in upland areas in particular. The dense monitoring networks at Plynlimon together with a rigorous data quality control programme underpins the value of the hydrometric datasets as important benchmarks against which to assess the significance of the very unusual patterns of rainfall and runoff which have characterised the recent past.
This paper places the rainfall, runoff and losses data for Plynlimon in the perspective provided by a number of long hydrometric records for maritime western Europe. The representativeness of the Plynlimon base period is considered with particular reference to both the historical stability which typifies the great majority of European hydrometric time series and the recent extension in the recorded range of accumulated rainfall and runoff totals which has been identified in some regions (e.g. western Scotland and Norway). Particular attention is directed to changes in seasonal rainfall and runoff patterns and the recent increases in evaporative demands. Some of the implications for the overall water balance and for water resource management are considered
Vista de la barbacana del Castillo en proceso de restauración y operarios ejecutando tapiales en el muro norte.
No full textPredicting rehospitalization in patients treated with antipsychotics: a prospective observational study
No full textBackground: Prediction of rehospitalization in patients treated with antipsychotics is important for identifying patients in need of additional support to prevent hospitalization. Our aim was to identify factors that predict rehospitalization in patients treated with antipsychotics at discharge from a psychiatric hospital. Methods: Adult patients suffering from schizophrenia, psychotic or bipolar I disorders who had been hospitalized in a psychiatric hospital for ⩾7 days and were treated with oral antipsychotics at discharge were included. The main outcome was rehospitalization within 6 months after discharge. A prediction model for rehospitalization was constructed including: patient/disease and medication characteristics, patients’ beliefs about medicines, and healthcare-professional-rated assessment for all patients. The patients were stratified by diagnosis (schizophrenia and nonschizophrenia). Area under the receiver operating characteristic curve (AUCROC) was also assessed. Results: A total of 87 patients were included and 33.3% of them were rehospitalized within 6 months after discharge. The variables that predicted rehospitalization were duration of hospitalization, patients’ attitude towards medicine use, and healthcare-professional-rated assessment with an AUCROC of 0.82. Rehospitalization for patients with schizophrenia could be predicted (AUCROC = 0.71) by the Global Assessment of Functioning score, age, and harm score. Rehospitalization was predicted (AUCROC = 0.73) for nonschizophrenia patients with, for example rehospitalization predicted by the nurse. Conclusions: Rehospitalization was predicted by a combination of variables from the patient/disease and medication characteristics, patients’ attitude towards medicine use, and healthcare-professional-rated assessment. These variables can be assessed relatively easily at discharge to predict rehospitalization within 6 months
Average hippocampal volume (across right and left sides) in high (solid) and low (dashed) LEQ groups at baseline and 3 year follow-up.
No full text<p>Error bars represent standard error of mean. *p-value after covariate control for age, gender, hypertension, baseline volume and total intracranial volume.</p
Examples of hippocampal volumes from a high and low LEQ individual at the 3 year follow-up stage.
No full text<p>Note the relative increase in the volume of the inferior horn of the lateral ventricle. Average volumes refer to the mean across right and left sides. Right hippocampus tracing shown in red.</p
Data_Sheet_1_Relationship Between Sulcal Characteristics and Brain Aging.docx
No full textThis study aimed to determine whether sulcal morphology differs between middle age (MA) and older healthy individuals. Furthermore, we sought to determine whether age-related differences in sulcal characteristics were more strongly associated with differences in local or global cortical volumes. Participants (age 44–50, N = 403; age 64–70, N = 390) from the Personality and Total Health Through Life (PATH) study were included. Sulci were 17.3% wider, on average, in old age (OA) compared to MA participants, with the largest difference in the left superior frontal sulcus. Differences in sulcal width were generally higher in males than females. Differences in the width of the superior frontal and central sulci were significantly associated with differences in the volume of adjacent local gyri, while age-related differences in the width of lateral and superior temporal sulci were associated with differences in whole brain cortical volume. These findings suggest that sulcal characteristics provide unique information about changes in local and global brain structure in aging.</p
Comparison of different neurodegenerative markers in high and low brain mental activity groups.
No full text<p>Variables were compared using the ANCOVA procedure whilst controlling for age, hypertension (HT), gender and multiple comparisons. All change analyses included the additional covariate of the respective baseline measure. <sup>†</sup> Addition of TICV covariate did not change results (F = 5.97, p = 0.02). High and low LEQ was by median-split. WBV: Whole Brain Volume, WMH: White matter hyperintensity.</p
Scatterplot of total LEQ and hippocampal volume at three year follow-up.
No full text<p>Zero-order correlation is shown in dashed line (r = 0.42, p = 0.006).</p
