Fermionic Symmetries: Extension of the two to one Relationship Between the Spectra of Even-Even and Neighbouring Odd mass Nuclei

In the single j shell there is a two to one relationship between the spectra of certain even-even and neighbouring odd mass nuclei e.g. the calculated energy levels of J=0^+ states in ^{44}Ti are at twice the energies of corresponding levels in ^{43}Ti(^{43}Sc) with J=j=7/2. Here an approximate extension of the relationship is made by adopting a truncated seniority scheme i.e. for ^{46}Ti and ^{45}Sc we get the relationship if we do not allow the seniority v=4 states to mix with the v=0 and v=2 states. Better than that, we get very close to the two to one relationship if seniority v=4 states are admixed perturbatively. In addition, it is shown that the higher isospin states do not contain seniority 4 admixtures.Comment: 11 pages, RevTex file and no figures, typos added, references changed and changed content

Canonical steering ellipsoids of pure symmetric multiqubit states with two distinct spinors and volume monogamy of steering

Quantum steering ellipsoid formalism provides a faithful representation of all two-qubit states and helps in obtaining correlation properties of the state through the steering ellipsoid. The steering ellipsoids corresponding to the two-qubit subsystems of permutation symmetric $N$-qubit states is analysed here. The steering ellipsoids of two-qubit states that have undergone local operations on both the qubits so as to bring the state to its canonical form are the so-called canonical steering ellipsoids. We construct and analyze the geometric features of the canonical steering ellipsoids corresponding to pure permutation symmetric $N$-qubit states with two distinct spinors. Depending on the degeneracy of the two spinors in the pure symmetric $N$-qubit state, there arise several families which cannot be converted into one another through Stochastic Local Operations and Classical Communications (SLOCC). The canonical steering ellipsoids of the two-qubit states drawn from the pure symmetric $N$-qubit states with two distinct spinors allow for a geometric visualization of the SLOCC-inequivalent class of states. We show that the states belonging to the W-class correspond to oblate spheroid centered at $(0,0,1/(N-1))$ with fixed semiaxes lengths $1/\sqrt{N-1}$ and $1/(N-1)$. The states belonging to all other SLOCC inequivalent families correspond to ellipsoids centered at the origin of the Bloch sphere. We also explore volume monogamy relations of states belonging to these families, mainly the W-class of states.Comment: 13 pages, 13 figures; Revised version; Comments welcom

Patterns of epithelial cell abnormalities in Pap smears and its clinicopathological and demographic association: a descriptive study from Visakhapatnam city, Andhra Pradesh, India

Background: Cervical cancer is one of the leading cancers amongst women. Periodic pap screening is the simplest way to diagnose precancerous lesions. Factors such as ignorance, poverty poorly developed public healthcare delivery system put women in urban slums at a disadvantage for receiving any health screening activity. Objectives of the present study were to know the prevalence of epithelial cell abnormalities of the cervix among the subjects and to study the association with clinical and demographic characteristics.Methods: A camp based descriptive study was conducted in an urban ward. All women above the age of 20 years were included in the study. Data was recorded using a pretested questionnaire. Study variables included socio-demographic characteristics, symptoms of reproductive tract infection, findings of clinical examination, and Pap smear collection and evaluation. The latter was done from 194 women aged between 20-69 years. Pap smears were made by conventional Pap smear technique and reported according to The Revised Bethesda System of classification 2001(TBS).Results: Among the 194 women, in 8 subjects, the smears collected were unsatisfactory for evaluation. Analysis was done in the remaining 186 subjects. Among the latter, in 83.9%, the smears were negative for intraepithelial lesions (NIEL) and 16.1% revealed epithelial cell abnormalities (ECA). Among those with ECA, Atypical cells of undetermined significance (ASCUS) was identified in 66.67%, Low grade squamous intraepithelial lesions(LSIL) in 16.67%, Atypical squamous cells-cannot exclude HSIL (ASC-H) and Atypical glandular cells-not otherwise specified (AGC-NOS) in 6.67% each and High grade squamous intraepithelial lesions (HSIL) in 3.33%. Epithelial cell abnormalities were more common in women in the age group of 30-60 years (80%), they were more common in those with age at marriage between 13-18 years (63.3%) and in those with age at first child birth between 15-19 years (56.7%). Conclusions: Therefore there is a need for Pap screening at regular intervals through camp based approach in these populations to motivate the women, increase their awareness, ensure follow up and referral and timely intervention in appropriate cases.

Sifat Fisis Dan Mekanis Komposit High Density Polyethylene (HDPE) – Hydroxyapatite (HAp) Dengan Teknik Iradiasi Gamma

High Density Polyethylene (HDPE) sebagai polimer sintetis dengan kerapatan komposit yang tinggi dan hydroxyapatite (HAp) merupakan komponen tulang yang penting. Komposit HDPE yang berfungsi sebagai matriks dengan HAp selayaknya dapat membentuk tulang sintetik. Komposit HDPE-HAp dengan rasio 2/1 : 3/1 : 4/1 (b/b,%) dikompaksi dan dipanaskan pada suhu 180 °C, selanjutnya diuji efektivitas radiasi gamma pada dosis 25 kGy dan 50 kGy. Komposit hasil iradiasi diukur kekerasan, Perubahan struktur kimia, morfologi, sifat termal, dan kristalinitas menggunakan Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), dan X-Ray Diffraction (XRD). Hasil evaluasi menunjukkan bahwa kekerasan komposit meningkat dari nilai 65 shore A hingga 69,5 shore A dengan waktu pemanasan 1 jam, 2 jam, dan 86 shore A dengan dosis radiasi 50 kGy untuk sampel komposit HDPE-HAp (2:1). Berdasarkan pengamatan dengan SEM menunjukkan permukaan komposit yang kompak dan HAp terikat secara fisik berdasarkan pengukuran dengan XRD dan DSC. Pengukuran FTIR menunjukkan tidak terjadinya Perubahan spektrum komposit hasil iradiasi. Iradiasi gamma dapat meningkatkan sifat mekanis komposit HDPE-HAp

Quantum Dissension: Generalizing Quantum Discord for Three-Qubit States

We introduce the notion of quantum dissension for a three-qubit system as a measure of quantum correlations. We use three equivalent expressions of three-variable mutual information. Their differences can be zero classically but not so in quantum domain. It generalizes the notion of quantum discord to a multipartite system. There can be multiple definitions of the dissension depending on the nature of projective measurements done on the subsystems. As an illustration, we explore the consequences of these multiple definitions and compare them for three-qubit pure and mixed GHZ and W states. We find that unlike discord, dissension can be negative. This is because measurement on a subsystem may enhance the correlations in the rest of the system. This approach can pave a way to generalize the notion of quantum correlations in the multiparticle setting.Comment: 9 pages 6 figures typo fixed and some arguments adde

Role of Decompressive Craniectomy in the Management of Cerebral Venous Sinus Thrombosis

Cerebral venous sinus thrombosis (CVST) is a relatively uncommon cause of stroke more often affecting women and younger individuals. Blockage of the venous outflow rapidly causes edema and space-occupying venous infarctions and it seems intuitive that decompressive craniectomy (DC) can effectively reduce intracranial pressure just like it works for malignant middle cerebral artery infarcts and traumatic brain injury. But because of the relative rarity of this type of stroke, strong evidence from randomized controlled trials that DC is a life-saving procedure is not available unlike in the latter two conditions. There is a possibility that other forms of interventions like endovascular recanalization, thrombectomy, thrombolysis, and anticoagulation, which cannot be used in established middle cerebral artery infarcts and TBI, can reverse the ongoing pathology of increasing edema in CVST. Such interventions, although presently unproven, could theoretically obviate the need for DC when used in early stages. However, in the absence of such evidence, we recommend that DC be considered early as a life-saving measure whenever there are large hemorrhagic infarcts, expanding edema, radiological, and clinical features of impending herniation. This review gives an overview of the etiology and risk factors of CVST in different patient populations and examines the effectiveness of DC and other forms of interventions

Complications of Decompressive Craniectomy

Decompressive craniectomy (DC) has become the definitive surgical procedure to manage medically intractable rise in intracranial pressure due to stroke and traumatic brain injury. With incoming evidence from recent multi-centric randomized controlled trials to support its use, we could expect a significant rise in the number of patients who undergo this procedure. Although one would argue that the procedure reduces mortality only at the expense of increasing the proportion of the severely disabled, what is not contested is that patients face the risk of a large number of complications after the operation and that can further compromise the quality of life. Decompressive craniectomy (DC), which is designed to overcome the space constraints of the Monro Kellie doctrine, perturbs the cerebral blood, and CSF flow dynamics. Resultant complications occur days to months after the surgical procedure in a time pattern that can be anticipated with advantage in managing them. New or expanding hematomas that occur within the first few days can be life-threatening and we recommend CT scans at 24 and 48 h postoperatively to detect them. Surgeons should also be mindful of the myriad manifestations of peculiar complications like the syndrome of the trephined and neurological deterioration due to paradoxical herniation which may occur many months after the decompression. A sufficiently large frontotemporoparietal craniectomy, 15 cm in diameter, increases the effectiveness of the procedure and reduces chances of external cerebral herniation. An early cranioplasty, as soon as the brain is lax, appears to be a reasonable choice to mitigate many of the late complications. Complications, their causes, consequences, and measures to manage them are described in this chapter