Spectral fluctuation characterization of random matrix ensembles through wavelets

A recently developed wavelet based approach is employed to characterize the scaling behavior of spectral fluctuations of random matrix ensembles, as well as complex atomic systems. Our study clearly reveals anti-persistent behavior and supports the Fourier power spectral analysis. It also finds evidence for multi-fractal nature in the atomic spectra. The multi-resolution and localization nature of the discrete wavelets ideally characterizes the fluctuations in these time series, some of which are not stationary.Comment: 7 pages, 2 eps figure

Features in the Primordial Spectrum from WMAP: A Wavelet Analysis

Precise measurements of the anisotropies in the cosmic microwave background enable us to do an accurate study on the form of the primordial power spectrum for a given set of cosmological parameters. In a previous paper (Shafieloo and Souradeep 2004), we implemented an improved (error sensitive) Richardson-Lucy deconvolution algorithm on the measured angular power spectrum from the first year of WMAP data to determine the primordial power spectrum assuming a concordance cosmological model. This recovered spectrum has a likelihood far better than a scale invariant, or, `best fit' scale free spectra (\Delta ln L = 25 w.r.t. Harrison Zeldovich, and, \Delta ln L = 11 w.r.t. power law with n_s=0.95). In this paper we use Discrete Wavelet Transform (DWT) to decompose the local features of the recovered spectrum individually to study their effect and significance on the recovered angular power spectrum and hence the likelihood. We show that besides the infra-red cut off at the horizon scale, the associated features of the primordial power spectrum around the horizon have a significant effect on improving the likelihood. The strong features are localised at the horizon scale.Comment: 8 pages, 4 figures, uses Revtex4, matches version accepted to Phys. Rev. D, main results and conclusions unchanged, references adde

A Study on Clinical features, success rate and complications of endotherapy in choledocholithiasis

INTRODUCTION: Choledocholithiasis is defined as the occurrence of stones in the bile ducts. It is a common clinical problem worldwide. It has been estimated that 10–15% of patients undergoing cholecystectomy for symptomatic gallstones harbor concomitant stones in their CBD. Primary ductal stones formed de novo also add a further small percentage to the overall prevalence. OBJECTIVES: 1. To study the various clinical presentations of choledocholithiasis. 2. To study the success rate of endotherapy in choledocholithiasis. 3. To study the complications of endotherapy in choledocholithiasis. 4. To study the epidemiology of choledocholithiasis. 5. To study the associated conditions with choledocholithiasis. MATERIALS AND METHODS: This is a prospective study conducted in DDHD, Government peripheral Hospital, Anna Nagar, Chennai – 102 from April 2008 to December 2009. INCLUSION & EXCLUSION CRITERIA: 1. All patients with CBD stones who underwent ERCP were included in this study. 2. Patients with CBD stones not willing for ERCP were excluded from this study. 3. Patients with CBD stones who were all not fit for ERCP excluded. 4. Patients with obstructive jaundice other than CBD stones were excluded. All patients were explained about the procedure and its complications. We got informed consent from all the patients. ERCP was performed by the Professor and the Associate Professor of our department. All patients received premedications Inj. pentazocine 30mg (1cc), Inj.promethazine 50mg (2cc), Inj. hyoscine butylbromide 20mg (1cc), and Inj.midazolam 2mg I.V. RESULTS: In this study, the patients were divided into three groups; Group 1- Patients with CBD stones with GB stones, Group 2- Patients with CBD stones with no stones in GB, Group 3- Patients with CBD stones in postcholecystectomy state. Total number of patients underwent ERCP in our study were 115. Out of which 51 were males and 64 were females. Overall success rate was 91.3%. Failure rate was 8.69%. The procedure was successful in 95 patients in first attempt, 12 patients in second attempt, and 8 patients in third attempt. Abdominal pain was the presenting symptom in 70 [60.86%] patients, Jaundice in 44 [38.26%], Fever in 42 [36.52%], Charcots triad in 38 [33.04%], Biliary pancreatitis in 6 [5.21%], Asymptomatic in 4 [3.47%] patients. 38 patients developed post procedural abdominal discomfort, 13 patients developed pancreatitis [Mild-9, Moderate -4, and Severe - 0], and 2 patients had retroduodenal perforation. No post sphincterotomy bleeding noted. No procedure related mortality was noted in this study. CONCLUSION 1. Most common presentation of CBD stones in this study was abdominal pain 60.86%, followed by jaundice 38.26%, and fever 36.52%.Charcots triad was seen in 33.04%. 2. In the study, overall success rate was 91.3% and failure rate was 8.69%. 3. Overall complication rate was 13.04%. No post sphincterotomy bleeding was noted. No procedure related mortality was noted. Hence endotherapy are very effective with fewer complications in the treatment of choledocholithiasis. 4. CBD Stones were more common in females (F- 64 pts, M- 51 pts). Mean age of presentation was 49.91 years (range 9 – 76 yrs). 5. Biliary ascariasis was seen in one patient, choledochal cyst type 1 was seen in 2 patients, periampullary diverticulum was seen in 15 patients, distal CBD stricture was seen in 19 patients and intra hepatic stones were seen in 3 patients. 6. There was no statistically significant difference in clinical presentations, associated features, success rate and complications of endotherapy in all the three groups of choledocholithiasis

Stock assessment of seerfishes in the Indian seas

The annual average catch of seerfishes from the Indian seas was 45,0601 during 1995-'99, which constituted 1.8% of the total marine fish catch in India. State-wise Gujarat (28.5%) was the major producer followed by Tamilnadu (15.8%), Maharashtra (15.4%), Andhra Pradesh (11.4%) and Kerala (10.5%). Gill net is the dominant gear in exploiting seerfish followed by trawl, hooks & line, boat seines, shore seines and purse seines. Among the five species, the kingseer Scomberomorus commerson (59.0%) and the spotted seer S. guttatus (35.1%) sustained the fishery, while the streaked seer S.lineolatus and the wahoo Acanthocybium solandri formed only a negligible portion of the fisher

Cluster Radioactivity in 127I

Using the preformation cluster model of Gupta and collaborators we have studied all the possible cluster decay modes of 127 I. The calculated half-lives are compared with recently measured lower limits of cluster decay half-lives (for the clusters like 24Ne, 28Mg, 30Mg, 32Si, 34Si, 48Ca and 49Sc) of 127I. Our calculated half-life values lies well above the experimentally measured lower limits and the trend of the values also matches with experimental ones

Status of exploitation of seerfishes in the Indian seas

Seerfish production from the Indian seas during the past five decades from 1950s to 1990s, showed an increasing trend. The annual catch increased from 4,505 t in 1953 to 54,8761 in 1998. The average annual catch during the five decadal periods k-aried from 7,278 t in 1950-'59 to 41,575 t in 1990-'99 contributing 1.5% and 1.75% respectively to the total marine fish catch of India. However, the rate of increase through the successive decades decreased indicating the attainment of op- ;imum level of production currently. During 1950-'59, the east coast contributed more (60%) than the west coast (40%), which changed to 36:64 during 1990-'99. iVmong the maritime states of India, Gujarat (25.88%), Maharashtra (16.09%), familnadu (13.59%), Kerala (13.07%) and Andhra Pradesh (12.68%) were the prime seerfish producers during 1990-'99. Gill net (64.8%) was the dominant gear, folowed by trawl (17.4%) and hooks and line (4%) with an average catch rate of 8.1 <g/unit, 0.24 kg/hr and 3.7 kg/unit respectively during 1995-'99. Among the five species, the fishery was sustained only by two species viz., the king seer Scomberomorus commerson and the spotted seer S.guttatus

Status of exploitation of coastal tunas in the Indian seas

Tuna and billfish production from Indian seas during the period 1985-'99 evinced an increasing trend and the landings fluctuated between 24,287 t (1987) and 53,6621 (1992). The average annual production during the said period was 40,2041, contributing to 3.6% of the total pelagic fish landings and 1.8% of the total marine fish landings. On an average, 24% of the total tuna and billfish production during 1991-'99 was contributed by northwest coast, 2% by Andaman and Nicobar islands and 14.9% by Lakshadweep. Among the maritime states, Kerala (36 %), Gujarat (18.1%) Tamilnadu (11.6%), Maharashtra (5.9%), Kamataka (5%), Andhra Pradesh (4.4 %) and Goa (2%) were the prime tuna producing states

Patient choice significantly affects mastectomy rates in the treatment of breast cancer

Mastectomy rates may be affected by patient choice. 203 patients who had a Total Mastectomy for breast cancer were invited to complete questionnaires at routine follow up clinics to ascertain if they had been offered a choice of Breast Conserving Surgery (BCS), and to establish the reasons for their preference. Questionnaires were checked against medical and nursing records to confirm the reasons for the patients' choice of mastectomy. 130 patients (64%) chose to have a mastectomy, reporting that they felt safer (n = 119); wanted to decrease the risk of further surgery (n = 87) and/or wished to avoid radiotherapy (n = 34). Some were advised not to have BCS if they had a large tumour size, central or multifocal tumours and/or associated extensive microcalcification on mammography (n = 29). 24 patients had BCS as first operation but had repeat surgery for involved or narrow excision margins. Despite being advised that there is no difference between survival rates of this and breast conserving surgery, many patients still feel safer with mastectomy