On Strong Monogamy Conjecture in Four-Qubit System

Monogamy is a defining feature of entanglement, having far reaching applications. Recently, Regula \textit{et.al.} in Phys. Rev. Lett. \textbf{113}, 110501(2014) have proposed a stronger version of monogamy relation for concurrence. We have extended the strong monogamy inequality for another entanglement measure, viz., negativity. In particular, we have concentrated on four-qubit system and provided a detail study on the status of strong monogamy on pure states. Further, we have analytically provided some classes of states for which negativity and squared negativity satisfy strong monogamy. Numerical evidences have also been shown in proper places. Our analysis also provides cases where strong monogamy is violated.Comment: 8 pages, 8 figures, revtex, comments welcom

Application of Speaker Recognition on Biometric

Speaker recognition is the process of determining which registered speaker provides a given utterance followed by the process of accepting or rejecting the identity claim of a speaker. This paper reports on an experimental study involving signal processing in both time and frequency domain, and to receive a small bit of insight into the principles of speech analysis. This was accomplished by recording four speech segments from each person in our classroom, all of them varying slightly. Comparisons and analysis were then made on each signal, depending upon the instructions given by Dr. Qi

Impact response of functionally graded conical shells

This paper presents low velocity impact response of functionally graded pretwisted conical shells. The modified Hertzian contact law which accounts for permanent indentation is utilized to compute the contact force and other impact parameter. The time dependent equations are solved by Newmark's time integration scheme. An eight noded isoparametric quadratic element is employed in the present finite element formulation. A parametric study is carried out to investigate the effects of triggering parameters like initial velocity of impactor, twist angle, oblique impact angle, location of impact for Stainless Steel-Nickel functionally graded conical shell subjected to low velocity impact

Association of vitamin D3 with psoriasis and psoriatic arthritis-an observational study

Background: The objective of this study is to investigate the association between 25 (OH) vit D3 level and psoriasis, in our city with long sunny weather, in an attempt to clarify the controversies. Methods: The 100 patients with psoriasis including 29 with psoriatic arthritis were taken randomly as cases from medicine outpatient department of KPCMCH. Psoriasis area and severity index (PASI) was calculated for all patients with psoriasis and disease activity score (DAS28-CRP) in all arthritis patients. The control group had 150 age and sex-matched participants without any symptoms related to psoriasis or psoriatic arthritis. The 25 (OH) vit D3 serum level was estimated for both groups. This is an observational, cross-sectional study. Results: Out of total 100 patients, 55% were male and 45% female, with mean age and disease duration 49.7±6.7 years and 11.4±3.5 years, respectively. The control group had 150 subjects (86 males, 64 females). The 25 (OH) vit D3 levels of both patients and controls were 19.2±8.5 ng/ml and 29.9±6.7 ng/ml, respectively and the difference was statistically significant (p<0.05). The 25(OH) vit D3 levels were 21.9±4.1 ng/ml in patients with disease duration <10 years, and 15.9±4.2 ng/ml in patients with disease duration ≥ 10 years and difference was statistically significant (p<0.05). It was 18.9±7.8 ng/ml and 20.1±8.4 ng/ml respectively in psoriasis patients with and without arthritis but the difference was statistically not significant (p>0.05). The 25(OH) vit D3 level was lower in psoriasis with high PASI compared to psoriasis with low-moderate PASI and lower in psoriatic arthritis with high disease activity compared to arthritis with low-moderate disease activity. Conclusions: Both psoriasis and psoriatic arthritis patients had lower 25 (OH) vit D3 levels. The disease durations were directly related to 25 (OH) vit D3 insufficiency. Lower levels were associated with higher active diseases

Instance Space of the Number Partitioning Problem

Within the replica framework we study analytically the instance space of the number partitioning problem. This classic integer programming problem consists of partitioning a sequence of N positive real numbers \{a_1, a_2,..., a_N} (the instance) into two sets such that the absolute value of the difference of the sums of $a_j$ over the two sets is minimized. We show that there is an upper bound $\alpha_c N$ to the number of perfect partitions (i.e. partitions for which that difference is zero) and characterize the statistical properties of the instances for which those partitions exist. In particular, in the case that the two sets have the same cardinality (balanced partitions) we find $\alpha_c=1/2$. Moreover, we show that the disordered model resulting from hte instance space approach can be viewed as a model of replicators where the random interactions are given by the Hebb rule.Comment: 7 page

Effectiveness of pegylated erythropoietin in renal anaemia patients on dialysis-a multicentre, cross-sectional, observational outcome study

Background: Low dose of pegylated erythropoietin (PegEPO) is better than conventional erythropoietin stimulating agents (ESAs) in improving hyporesponsiveness and maintaining stable haemoglobin (Hb) levels in renal anaemic patients undergoing hemodialysis. This real-world study aimed to assess effectiveness and safety of low-dose PegEPO (30 µg/0.3 mL), administered at different time-points in renal anaemia patients on dialysis. Methods: HEMEPEG (HEMoglobin outcomE with PegEPO) was a multicentre, retrospective, cross-sectional, observational study of renal anaemia patients receiving PegEPO up to 3 months. The study assessed an increase in Hb, patients achieving Hb 10-12 g/dl, and Hb increase by ≥1 and ≥2 g/dl. Results: Data from 223 out of 273 patients from 19 Indian centers were analyzed. PegEPO was administered weekly to 132 patients (59.19%), with 38.64% being diabetic and 77.27% previously treated with ESAs. Ten day dosing was given to 91 patients (40.81%), including 46.15% diabetic patients and 72.53% previously treated with ESAs. A Significant (p<0.0001) increase in mean Hb levels from baseline to day 30, 60 and 90 were observed for both studied groups, with a target Hb of 10-12 g/dl achieved in 51.08% and 52.85% of patients in the respective groups after 3 months. An increase in Hb by ≥1 and ≥2 g/dl were observed in weekly (68.67% and 45.78%) and 10-day group (77.14% and 50.00%) patients, respectively. Conclusions: PegEPO (30 µg/0.3 mL) was effective treatment of renal anaemia and diabetic chronic kidney disease (CKD) patients on dialysis when administered weekly or every 10 days over a 3-month treatment period