922 research outputs found
Ginzburg-Landau theory of noncentrosymmetric superconductors
The data of temperature dependent superfluid density in
LiPdB and LiPtB [Yuan {\it et al.}, \phrl97, 017006 (2006)]
show that a sudden change of the slope of occur at slightly lower
than the critical temperature. Motivated by this observation, we
microscopically derive the Ginzburg-Landau (GL) equations for
noncentrosymmetric superconductors with Rashba type spin orbit interaction.
Cooper pairing is assumed to occur between electrons only in the same spin
split band and pair scattering is allowed to occur between two spin split
bands. The GL theory of such a system predicts two transition temperatures, the
higher of which is the conventional critical temperature while the lower
one corresponds to the cross-over from a mixed singlet-triplet phase at
lower temperatures to only spin-singlet or spin-triplet (depending on the sign
of the interband scattering potential) phase at higher temperatures. As a
consequence, shows a kink at this cross-over temperature. We
attribute the temperature at which sudden change of slope occurs in the
observed to the temperature . This may also be associated with
the observed kink in the penetration depth data of CePtSi. We have also
estimated critical field near critical temperature.Comment: 7 pages, 1 figur
Rate-distortion function for finite block codes: Analysis of symmetric binary hamming problem
Shannon's rate-distortion theory provides an asymptotic analysis, where delays are allowed to grow unbounded. In practice, real-time applications, such as video streaming and network storage, are subject to certain maximum delay. Accordingly, it is imperative to develop a finite-delay framework for analyzing the rate-distortion limit. In this backdrop, we propose an intuitive generalization of Shannon's asymptotic operational framework to finite block codes. In view of the extreme complexity of such framework, we obtain insight by specializing to the symmetric binary hamming problem. Even upon such specialization, the proposed framework is computationally so intensive that accurate evaluation of the finite-delay rate-distortion function is practical only upto a block length of three. In order to obtain further insight, we then propose a lower-complexity lower bound, based on the partition function of natural numbers, whose computation is practical upto a block length of six. Finally, using a simple combinatorial argument, we propose an upper bound to localize the desired rate-distortion function between our lower and upper bounds
Manifestation of helical edge states as zero-bias magneto-tunneling-conductance peaks in non-centrosymmetric superconductors
Helical edge states exist in the mixed spin-singlet and -triplet phase of a
noncentrosymmetric superconductor (NCSS) when the pair amplitude (PA) in the
negative helicity band, , is smaller than the PA in the positive
helicity band, , i.e., when the PA in the triplet component is more
than the same in the singlet component. We numerically determine energies of
these edge states as a function of . The presence
of these edge states is reflected in the tunneling process from a normal metal
to an NCSS across a bias energy : (i) Angle resolved spin conductance (SC)
obeying the symmetry shows peaks when the bias energy
equals the available quasiparticle edge state energy provided . (ii) The total SC, , is zero but modulates with for finite
magnetic field . (iii) The zero bias peaks of and total charge
conductance, , at finite split into two at finite for moderate
. (iv) At zero bias, and increase with and show peaks at
where is a characteristic field.Comment: minor changes; one figure is adde
An Ayurvedic approach to Post Covid Symptoms
COVID- 19, the recent virus outbreak declared as Pandemic by WHO threatened the world by its fast-spreading nature and is yet creating an alarmed situation throughout the world by Post Covid Symptoms. A recent study on post-COVID manifestation of symptoms showed that about 72 percent of participants had major complaints only 10.8 percent of survivors assessed in the study had no symptoms or manifestations Post Covid. The most common symptoms of COVID-19 are fever, tiredness, and dry cough. Some patients may have aches and pain. However, the worlds had suffered a lot with this pandemic, further the Post Covid symptoms, may add burden to the population in handling their daily works and needs. The incidence is higher in older age group, obesity, diabetic, hypertensive and other respiratory illness. Due to persistent viremia, lack of immunity, Mental factors and other immune responses. Aim: To Understand the Post COVID Symptoms and Their Management Through Ayurvedic Treatment Modalities. Data source: Ayurvedic literature, Different Ayurvedic and Medical journal, Review articles, Evidence-based articles published online, various National health websites are considered. Result: Ayurveda has enormous potential and treatment options which are available for enhancing the immunity and systemic illness and positively influence mental health, thus helpful in combating Post Covid symptoms. Conclusion: Ayurveda should be used as main treatment modality for Heath restoration and Prevention of Post Covid symptoms and recurrence, rather than an adjuvant therapy in treating Post COVID symptoms
Spin analog of the controlled Josephson charge current
We propose a controlled Josephson spin current across the junction of two
non-centrosymmetric superconductors like CePt_3Si. The Josephson spin current
arises due to direction dependent tunneling matrix element and different
momentum dependent phases of the triplet components of the gap function. Its
modulation with the angle \xi between the noncentrosymmetric axes of two
superconductors is proportional to \sin \xi. This particular dependence on \xi
may find application of the proposed set-up in making a Josephson spin switch.Comment: 4 pages, 1 figure; title is changed; article is rewritte
A rare presentation of shingles (herpes zoster) in an infant
Herpes zoster (HZ) in children is very rare. We report a case of HZ in an infant which responded well to the treatment. HZ shouldalso be considered in an infant with vesiculo-bullous lesion in a dermatomal distribution
CLOZAPINE-INDUCED DIABETIC KETOACIDOSIS: A CASE REPORT
 The objective of this study was to report a case of a person with psychiatric illness treated with clozapine presented with diabetic ketoacidosis (DKA). A clinical monitoring was done on a 38-year-old Indian man affected by schizoaffective disorder, bipolar type presented with DKA after 3 months of clozapine therapy (250 mg/day). After treatment of DKA and discontinuation of clozapine, the patient improved symptomatically, his blood sugar levels normalized and insulin requirements also decreased. This report thus highlights that clinicians should be vigilant about the potential risk of new-onset diabetes and DKA in patients taking clozapine and utilize appropriate clinical and laboratory monitoring early in the course of treatment to prevent serious adverse effects
Aqua{6,6′-dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}(4-hydroxybenzoato)manganese(III)
The title compound, [Mn(C18H18N2O4)(C7H5O3)(H2O)], was synthesized by a template reaction of ethane-1,2-diamine and 3-methoxysalicylaldehyde in presence of manganese(II) 4-hydroxybenzoate. The Jahn–Teller-distorted manganese(III) centre has an octahedral geometry. Extensive O—H⋯O hydrogen-bonding interactions generate a two-dimensional sheet structure parallel to (103)
Curing Acute Prostatitis by means of Ayurveda - A Case Report
Bacterial prostatitis (BP) is a bacterial infection of the prostate gland occurring in a bimodal distribution in younger and older men. It can be acute (ABP) or chronic (CBP) in nature and if not treated appropriately, can result in significant morbidity. Ayurveda is a traditional system of medicine, in which herbal medicines are mainly used for restoring the health. This case report deals with the way of curing acute prostatitis using Ayurveda treatment modalities
DRUG UTILIZATION PATTERN OF ANTIDIABETIC DRUGS AMONG DIABETIC OUTPATIENTS IN A TERTIARY CARE HOSPITAL
 Objective: The aim was to evaluate the drug utilization pattern of anti-diabetic drugs in diabetic outpatients and monitor the adverse drug reactions(ADRs) associated with anti-diabetic therapy.Methods: A prospective observational study was carried out in adult diabetic patients visiting the outpatient Departments of General Medicine andEndocrinology of a tertiary care hospital. Demographic data, drug utilization pattern and ADRs due to anti-diabetic drugs were summarized.Results: In the present study, 99 (50.3%) of the 197 diabetic patients were males. Majority of patients were in the age group of 51-60 years (39.6%) andmost of the patients (36.5%) had a diabetic history of <5 years. Metformin was the most commonly prescribed drug (68%), followed by sulfonylureaclass of drugs (49.7%). Nearly, 42% patients were using insulin preparations with 30.4% using biphasic isophane human insulin. Majority of thepatients (58.4%) were on multidrug therapy with two drug therapies being received by nearly 40%. Metformin was the most commonly prescribeddrug in monotherapy (18.8%) and glimepiride + metformin was the most common two drug therapy (13.2%). Co-morbid condition was found in 172patients (87.3%) with hypertension (68.5%) being the most common co-morbid condition. 17 ADRs were observed with hypoglycemia being the mostcommon ADR reported.Conclusions: Metformin was the most commonly used drug. The prescribing trend also appears to be moving towards combination therapyparticularly two drug therapies.Keywords: Drug utilization, Anti-diabetic drug, Adverse drug reaction
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