Prediction modeling using artificial neural network (ANN) for the performance and emission characteristics of catalytic co-pyrolytic fuel blended with diesel in a CI engine.

In the present research work, artificial neural network (ANN) is used to model the performance and emission parameters in a four-stroke, single-cylinder diesel engine combusting a blended fuel of diesel and catalytic co-pyrolysis oil produced from seeds of Pongamia pinnata, waste LDPE, and calcium oxide catalyst. The optimum yield of oil obtained was 92.5% at 500 °C temperature. Physical properties of the obtained oil, such as calorific value (44.85 MJ/kg) and density (797 kg/m3), level it by that of diesel while the flash point and fire point were found to be lower than that of pure diesel. An ANN model was then generated for the prediction of performance characteristics (BTE and BSFC) and emission characteristics (NOx and smoke) under varying loads, braking power, brake mean effective pressure, and torque as inputs using the Levenberg-Marquardt back-propagation training technique. The regression coefficients (R2) for BTE, BSFC, smoke, and NOx predictions were determined to be close to unity at 0.99859, 0.99814, 0.96129, and 0.92505, respectively (all values being close to unity). It has been discovered that ANN makes an effective simulation and prediction tool for blended fuels in CI engines. It is also suggested to predict the mechanical efficiency, volumetric efficiency, and CO, CO2, HC emissions using ANN in its future work.

Somatoform disorders in patients with chronic pain.

OBJECTIVE: To assess the frequency and characteristics of somatoform disorders in patients with chronic pain. METHOD: The study took place in the psychiatric outpatient clinic of a rehabilitation hospital. Participants were interviewed using the World Health Organization Somatoform Disorders Schedule (WHO-SDS) version 2.0. Thirty new and 30 current attendees to the clinic were interviewed following referral by pain medicine specialists. RESULTS: Somatoform disorders were commonly co-morbid with chronic pain in the study population. Persistent somatoform pain disorder (PSPD) was the commonest somatoform disorder. There was a significant difference between women and men suffering from somatic autonomic dysfunction (SAD). CONCLUSIONS: The findings of this study confirm that somatoform disorders are common co-morbid diagnoses in patients with chronic pain. Combining psychological treatments with medication, appropriate physical treatments and attending to social issues, may indeed improve the well-being of such patients.

A comparison of brief intervention versus simple advice for alcohol use disorders in a North India community-based sample followed for 3 months.

AIM: To examine the change in alcohol use parameters following a brief intervention (BI) based on the FRAMES protocol, compared to simple advice (SA), in a community setting in North India. METHOD: Ninety male subjects, 20-45 years old, with an AUDIT score between 8 and 24, consented to participate in this study. They were recruited from an earlier study on treatment, non-seeking, and allocated alternatively to the BI or SA protocols. The subjects were compared on drinking parameters, Addiction Severity Index (ASI), WHO Quality of Life (WHOQOL_Bref) and readiness to change (RCQ) after 1 month and 3 months post intervention. The assessments were made by an investigator blind to the intervention status of the subject. RESULTS: Of the 90 subjects, 87 (96.7%) were available for follow up in the first month and 86 (95.6%) in the third month. There was significant improvement across many drinking and QOL parameters in both the BI and SA groups, Significant differences were noticed across interventions, with a decrease in severity of dependence as measured by alcohol use in the last 30 days, composite ASI scores & improvement in physical and psychological quality of life, in those who received BI compared to those who received SA. Changes in motivation toward action were documented at first follow up, but were not sustained in either of the interventions. CONCLUSIONS: BI had a slight advantage over SA in excessive users of alcohol in this community setting in India. It is probable that booster sessions would be needed to achieve sustained effect.

Chronic mania: An unexpectidly long episode?

Mood disorders (unipolar and bipolar disorders) are one of the most distressing and disabling disorders known to man kind. Mood disorders may present as either a depressive phase or manic phase. Chronic mania by definition means presence of manic symptoms in excess of 2 yrs without remission. Chronic mania differs in its psychopathological presentation from the acute mania. Chronic mania also poses a diagnostic and management challenge. Along with the poor response to the treatment these patients are also likely to suffer from severe impairment in the social, familial, interpersonal and occupational functioning. These disturbances may add to the chronicity of the condition. This case underlines the significance of keeping possibility of chronic mania which has been overlooked in the recent literature.

Disability assessment in mental illnesses using Indian Disability Evaluation Assessment Scale (IDEAS).

BACKGROUND & OBJECTIVE: Psychiatric disorders cause disability in individuals and pose significant burden on their families. In most of the cases residual disability and poor quality of life continue even after disability evaluation in patients with chronic mental illness in very important. The present study was undertaken to assess and compare the disability in patients with schizophrenia and obsessive-compulsive disorder (OCD) using Indian Disability Evaluation Assessment Scale (IDEAS). METHODS: Patients diagnosed to have schizophrenia and OCD with mild severity of illness were included in the study. Indian Disability Evaluation Assessment Scale (IDEAS) was applied. Disability was assessed in these patients on all domains of IDEAS. RESULTS: Majority of the patients with schizophrenia were from rural areas whereas most of the patients with OCD were from urban background. There was comparable disability in the patients with schizophrenia with duration of illness in the range of 2-5 yr and >5 yr. Significant disability in work and global score was seen in patients of obsessive-compulsive disorder with duration of illness >5 yr. Patients with schizophrenia had significantly higher disability in all domains than patients with OCD. INTERPRETATION & CONCLUSION: Schizophrenia causes greater disability than obsessive-compulsive disorder in patients. These illnesses affect all areas of daily functioning leading to greater disability, and thus increasing the burden on the family, pose greater challenge for the rehabilitation of patients and their inclusion in the mainstream of the family and society. Further studies on a larger sample need to be done to confirm the finding.

Obsessive compulsive disorder:co-morbidity in manic phase of bipolar affective disorder.

Comorbidity is known to occur among various psychiatric disorders. About the third of the patients with Obsessive Compulsive Disorder have major depressive disorder and anxiety disorder but coexistence of Obsessive Compulsive Disorder with mania is rare to see. Here we report a case of Obsessive Compulsive Disorder where manic phase was accompanied by obsessions of contamination and pathological doubts along with cleaning rituals and spitting rituals.