On long-wavelength magnetic anomalies over Indian region

A data set composed of vector magnetic measurements obtained by MAGSAT and very accurate altitude determinations made using Sun sensors and star cameras was used to obtain data for very quiet days over the Indian region at 10 S to 40 N and 60 E to 110 E in an effort to determine the validity of quantitative estimates made from aeromagnetic data obtained by removing the core field. To further account for the external effects, the ring current contributions estimated using both X and Z variations were subtracted from the observed values. Before this, the core contribution was eliminated through a spherical harmonic expansion with terms up to N=13. Analysis of the residual measurements using Fast Fourier techniques indicates that the anomalies contain substantial power for wavelengths of about 1500 kms. Because the ring current effect has a spatial structure of this dimension over India, efforts are being made to exactly eliminate these two interfering effects from the data

Nucleation Phenomenon in Oscillatory Reactions

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Validation of a patient-reported knee-specific outcome questionnaire specifically intended to assess pain, stiffness, and functional activities in Indians with osteoarthritis knees: an observational cross-sectional study

Background: Patient-reported outcome measurement assessments that are frequently used for knee joint disorders have ceiling effect. This restriction is allegedly not there in New Hindi score. Purpose of this study is to validate New Hindi Score in patients with osteoarthritis knee. Methods: Level II Prospective cohort study was conducted. In pilot study, 20 patients had their comprehension of New Hindi Score assessed. A prospective cohort study involving 200 individuals with osteoarthritis knee Kl grade 2 and 3 was conducted in AIIMS, Rishikesh, Uttarakhand. Patients' overall age 57.76±8.63 years, both mean and SD. There were 125 females & 75 males. Men's mean & SD were 59.52±9.39 while women's 56.70±8.00. All patients were requested to complete WOMAC, KOOS, OKS & New Hindi Score questionnaires. Validity, reliability, repeatability of New Hindi Score for knee function in KOA patients were evaluated. There's no floor ceiling effect. New Hindi Score's validity, responsiveness, and floor ceiling effect were assessed. Validity was measured using the Pearson correlation coefficient. Results: In pilot study participants answered all question accurately. New Hindi Score shows moderate correlation with WOMAC & weak correlation with OKS and KOOS (Pearson coefficients of 0.45, 0.21, and 0.28, respectively) with 95% confidence interval, indicating strong construct validity in primary study. There was no floor or ceiling effect seen. Conclusions: For KOA patients, New Hindi Score exhibits strong levels of validity, reliability, and reliability. As result, it can be effectively applied to research knee function in Indian population.

Gender difference in foot progression angle in patients with osteoarthritis knee: an observational cross-sectional study

Background: An essential clinical parameter related to gait is foot progression angle (FPA). The objective of this study was to evaluate foot progression angle difference between Kl grade 2 and 3 in osteoarthritis knee patients and understanding biomechanical factors associated knee OA. Methods: Study was conducted on 108 patients diagnose with osteoarthritis knee according to EULAR classification knee OA. Age, gender and BMI were recorded, gait analysis was done to evaluate difference in FPA between OA knee patients with KL grade 2 and 3. Results: The 108 patient, 68 female and 40 males with osteoarthritis knee were included in study. Mean age of patients was 55.92±0.8 year, mean BMI was 27.24±0.4 kg/m2. Mean and SD of FPA in male 7.31±3.60 and   in female 8.31± 4.18 in patients with Kl grade 2 and 3 mean difference between male and female FPA is -0.99 with 95% CI, p=0.43 and t=0.78. In KL grade 3, FPA mean and SD of male 6.79±2.80 and female 7.62±9.10, t=0.9, mean difference -0.83 with 95% CI and p=0.6925. Conclusions: This study suggests, females in comparison to males have less FPA and therefore, females are more prone in progression of knee OA. Potential confounders including age, gender, BMI disease severity did not alter magnitude, although 95% CI

Birefringence analysis of multilayer leaky cladding optical fibre

We analyse a multilayer leaky cladding (MLC) fibre using the finite element method and study the effect of the MLC on the bending loss and birefringence of two types of structures: (i) a circular core large-mode-area structure and (ii) an elliptical-small-core structure. In a large-mode-area structure, we verify that the multilayer leaky cladding strongly discriminates against higher order modes to achieve single-mode operation, the fibre shows negligible birefringence, and the bending loss of the fibre is low for bending radii larger than 10 cm. In the elliptical-small-core structure we show that the MLC reduces the birefringence of the fibre. This prevents the structure from becoming birefringent in case of any departures from circular geometry. The study should be useful in the designs of MLC fibres for various applications including high power amplifiers, gain flattening of fibre amplifiers and dispersion compensation.Comment: 18 page

Modelling the dynamics of turbulent floods

Consider the dynamics of turbulent flow in rivers, estuaries and floods. Based on the widely used k-epsilon model for turbulence, we use the techniques of centre manifold theory to derive dynamical models for the evolution of the water depth and of vertically averaged flow velocity and turbulent parameters. This new model for the shallow water dynamics of turbulent flow: resolves the vertical structure of the flow and the turbulence; includes interaction between turbulence and long waves; and gives a rational alternative to classical models for turbulent environmental flows

Simulated Model Studies on the Beneficiation of Calcareous Phosphate Ore

The main sources of rock phosphate are located in Rajasthan, Mussoorie (U.P.), Singhbhum (Bihar), Purulia (W.B.) etc. Phosphate rocks generally occur as calcitic, siliceous and ferruginous in nature. Rajasthan and Muss-oorie rocks are calcareous (CaO 40-50%). Hence to enrich the phosphate in the rock from average 16-20% to above 30% P205 two possible alternatives to beneficiate this ore

Incidence of kinesiophobia in patients with osteoarthritis knee an observational cross-sectional study

Background: The effects of kinesiophobia on pain perception in osteoarthritis patients have remained elusive. The intension of this study is to assess psychometric aspect of pain, functional activity, and kinesophobia in patients with chronic osteoarthritic knee pain. Methods: The study was time bound observational cross-section study, including 50 patients. Kinesiophobia was assessed using Tampa scale of kinesiophobia (TSK-11), while physical function and pain are assessed using WOMAC and VAS scores. Patients were included as per inclusion criteria in the OPD in Department of Orthopedics, AIIMS, Rishikesh, India. Results: It was observed 64% of patients were females while 36% were males. 46% patients had BMI range of 18.5-24.9, while 26% had BMI >=30, 20% had BMI between 25-29.9 and 8% of patients had BMI <18.5.  Mean BMI was 25.44±5.70 with minimum BMI of 14 and maximum BMI of 38. It was observed female patients mean WOMAC score was 44.44±19.41, while mean VAS score 4.25±1.05 and mean TSK-11was 33.34±12.57, male patients mean WOMAC score was 35.39±13.62 while mean VAS score was 4.39±0.92, mean TSK-11 was 35.78±14.52. It was observed that there was no substantial difference on basis of gender in all three parameters when compared.  This study suggests, there was no significant association between Age and VAS score (p-value 0.017) with Pearson correlation of 0.335. Conclusions: Prospective therapies for kinesiophobia should attempt to reduce pain intensity and functionality improvement

Comparison of temporal-spatial gait parameter in patients with osteoarthritis knee: an observational cross-sectional study

Background: Osteoarthritis knee (OA) symptoms, including pain, joint stiffness, reduced joint movement, and muscle strength, can affect gait kinetics, kinematics, and temporal-spatial characteristics. Spatial-temporal gait parameters are useful for assessing and identifying clinically significant changes in an individual's gait patterns and helps in rehabilitation. Methods: In this study 108 patients diagnosed with osteoarthritis knee according to EULAR classification knee OA were included in study. Age, gender and BMI were recorded for pain and function WOMAC Score was used, gait analysis was done to evaluate difference in temporo-spatial gait parameters between OA knee patients with KL grade 2 and 3. Results: A total of 108 patients with osteoarthritis knee were enrolled, including 40 men and 68 women. Total mean age was 55.92±9.05 years with P-value <0.05, and their average BMI was 27.24 kg/m2. Total WOMAC score mean 29.3±1.03. Mean WOMAC scores for pain 4.57±3.26, stiffness 2.60±0.12, function score 22.20±7.55 respectively. There was no significance difference between KL grade II and III including gender in temporal spatial gait parameters. Conclusions: This study suggests there is no significant difference in temporal-spatial gait parameters between Kl grade 2 and 3. Potential confounders including age, gender, BMI disease severity did not alter magnitude, although 95% CI

Extrahepatic undifferentiated embryonal sarcoma, cytology as an accurate method for early diagnosis: an extremely rare case report in an Indian child

Undifferentiated embryonal sarcoma has been described in the liver, a rare malignant mesenchymal neoplasm, that occurs primarily in children and teenagers. Approximately 260 cases have been reported arising in the liver since 1978 when this disease was first described. Its pathogenesis is still obscure. Authors presented a case of extrahepatic undifferentiated embryonal sarcoma in a 9-year-old female presenting with upper abdominal dull pain. Ultrasound and CT Scan showed normal liver architecture, with liver pushed upwards due to compression by tumor arising in the retroperitoneum. To the best of our knowledge, this is first case of extrahepatic undifferentiated embryonal sarcoma diagnosed on cytomorphology and confirmed by histopathology and immunohistochemistry markers