Compact and Wide Stopband Lowpass Filter Using Open Complementary Split Ring Resonator and Defected Ground Structure

A compact (0.16 λg x 0.08 λg) and wide stop¬band lowpass filter design using open complementary split ring resonator (OCSRR) and defected ground structure (DGS) is presented in this paper. Low pass filter is con-structed using two cascaded stages of OCSRR. Since the rejection bandwidth of the OCSRR is narrow, tapered dumbbell shaped DGS section is placed under the OCSRR to enhance the bandwidth. The cutoff frequency (fc) of the proposed lowpass filter is 1.09 GHz. The rejection band¬width of the filter covers the entire ultra wideband spec¬trum. Hence the spurious passband suppression is achieved up to 10 fc. The designed filter has been fabri¬cated and validated by experimental result

Symmetry-protected intermediate trivial phases in quantum spin chains

Symmetry-protected trivial (SPt) phases of matter are the product-state analogue of symmetry-protected topological (SPT) phases. This means, SPt phases can be adiabatically connected to a product state by some path that preserves the protecting symmetry. Moreover, SPt and SPT phases can be adiabatically connected to each other when interaction terms that break the symmetries protecting the SPT order are added in the Hamiltonian. It is also known that spin-1 SPT phases in quantum spin chains can emerge as effective intermediate phases of spin-2 Hamiltonians. In this paper we show that a similar scenario is also valid for SPt phases. More precisely, we show that for a given spin-2 quantum chain, effective intermediate spin-1 SPt phases emerge in some regions of the phase diagram, these also being adiabatically connected to non-trivial intermediate SPT phases. We characterize the phase diagram of our model by studying quantities such as the entanglement entropy, symmetry-related order parameters, and 1-site fidelities. Our numerical analysis uses Matrix Product States (MPS) and the infinite Time-Evolving Block Decimation (iTEBD) method to approximate ground states of the system in the thermodynamic limit. Moreover, we provide a field theory description of the possible quantum phase transitions between the SPt phases. Together with the numerical results, such a description shows that the transitions may be described by Conformal Field Theories (CFT) with central charge c=1. Our results are in agreement, and further generalize, those in [Y. Fuji, F. Pollmann, M. Oshikawa, Phys. Rev. Lett. 114, 177204 (2015)].Comment: 7 pages, 5 figures, 1 table, revised version. Accepted in PR

All spin-1 topological phases in a single spin-2 chain

Here we study the emergence of different Symmetry-Protected Topological (SPT) phases in a spin-2 quantum chain. We consider a Heisenberg-like model with bilinear, biquadratic, bicubic, and biquartic nearest-neighbor interactions, as well as uniaxial anisotropy. We show that this model contains four different effective spin-1 SPT phases, corresponding to different representations of the $(\mathbb{Z}_2 \times \mathbb{Z}_2) + T$ symmetry group, where $\mathbb{Z}_2$ is some $\pi$-rotation in the spin internal space and $T$ is time-reversal. One of these phases is equivalent to the usual spin-1 Haldane phase, while the other three are different but also typical of spin-1 systems. The model also exhibits an $SO(5)$-Haldane phase. Moreover, we also find that the transitions between the different effective spin-1 SPT phases are continuous, and can be described by a $c=2$ conformal field theory. At such transitions, indirect evidence suggests a possible effective field theory of four massless Majorana fermions. The results are obtained by approximating the ground state of the system in the thermodynamic limit using Matrix Product States via the infinite Time Evolving Block Decimation method, as well as by effective field theory considerations. Our findings show, for the first time, that different large effective spin-1 SPT phases separated by continuous quantum phase transitions can be stabilized in a simple quantum spin chain.Comment: 7 pages, 6 figures, revised version. To appear in PR

Rare And Unexplored Ethnozoological Practices of Tangkhul Naga Community of Manipur: A North Eastern State of India

Ethnozoology is an applied discipline that integrates both the basic and social sciences which observe the aspects of nature, socioeconomic, anthropological and historical aspects of the animal and human relationship exist in that community. Tangkhul Naga community of the Ukhrul district of Manipur have a rich heritage of using animal products in their folklore medicines for the treatment of various human ailments since time immemorial. The present study was carried out with an intention to find out various animal-based products uses in the traditional healing system among the Tangkhul Naga community of Manipur, India. A survey for the data collection was carried out for a period of one year through semi-structural questionnaires, interactions through oral conversations with local medicinal practitioners, old men and women. The study reveals that a total 21 different animal species and their products are used for the treatment of different human ailments. Of the total 21 numbers of animals, 9 belongs to the invertebrate groups and 12 to the vertebrate groups. Out of the 9 animals from the invertebrate group, 1 annelid, 7 arthropods and 1 mollusc comprise 4.76%, 33.3% and 4.67% fauna respectively while in the vertebrate group, 2 amphibians, 1 reptile, 3 Aves and 6 mammals contributed 9.5%, 4.76%, 14.28% and 28.57% fauna respectively. The finding shows that the ethnozoological practices of using animal derived medicines employed by Tangkhul community in Manipur plays an important part in the primary health care system of this community which are rare as well as undocumented till today. Proper documentation and sustainable exploration of such rare traditional information on ethno-zoological practices of the Tangkhul community of the Manipur will be helpful in the integration of the traditional knowledge system in the modern medicines and ultimately in the formation of strategies for sustainable exploration and conservation of such bio resources

Phytochemical analysis and antioxidant activity of leaf extracts of some selected plants of the family Acanthaceae

The present era of scientific research has witnessed an enumerable amount of evidences to showcase the immense potential of medicinal plants. In the present investigation, the phytochemical analysis of Phlogacanthus pubinervius T. Anderson., Adhatoda vasica (L.) Nees,Phlogacanthus thyrsiflorus Nees, Phlogacanthus curviflorus (Wall.) Nees, and Ruellia tuberosa L. was carried out for the different plants extracted with methanol. Analysis was carried out to estimate the quantity of phenols, carbohydrates, tannins, flavonoids and proteins. The antioxidant property of these plants were analysed using DPPH method. The concentration of the plant samples required to decrease the DPPH concentration by 50% was calculated by interpolation from linear regression analysis and denoted IC50 value (µg/ml). The qualitative analysis showed the presence of alkaloids, tannins, saponins, proteins, carbohydrate and phenols in all the sample extracts. The highest amount of tannins and phenols was observed in P. thyrsiflorus. P. pubinervius (77.83%), A. vasica (74.81%), P. curviflorus (94.20%), and R. tuberosa (70.78%) which showed highest antioxidant activity of DPPH-scavenging at 150 µg/ml of methanol extract. The high percent of scavenging activities of those plants add value to their medicinal properties. The presence of the high amount of phytochemical compounds suggests that the plants have high amount of medicinal compounds and can be extensively used to extract the natural compounds

Efficacy of Modified Eggs and Chick Muscles on Oxidative Stress of Type-2 Diabetes Mellitus Induced Male Wistar Rats

A modified poultry egg (Indian Patent Application No. 2264/Del-2005) and chick muscle enriched with optimum minerals, vitamin E and omega-3 fatty acid were developed and its efficacy was studied on oxidative stress of Type-2 diabetes mellitus induced male wistar rats. In this study, two groups of rats were fed on semi-synthetic diet containing 20 mg Zn/kg (control, group-I) and 80 mg Zn/kg (group-II) diet respectively for a period of 6 months. The study revealed that the gain in body weight increased in rats in Zn concentration dependent manner. The urine examined on weekly basis showed glucosuria in group-II on week 8 and thereafter. The blood lipid profile displayed a significant rise in serum glucose, total lipids, cholesterol, triglycerides, LDL-cholesterol, VLDL-cholesterol whereas HDL-cholesterol showed a reduction in their levels in group-II rats than their control counter parts. They displayed higher lipid peroxidation products and activities of superoxide dismutase, catalase, glutathione–s -transferase, glutathione reductase, glutathione (reduced) and glucose-6-phosphate dehydrogenase were significantly lowered and revealed a higher Zn concentration and lower Cu, Mg and Mn both in liver and kidney. On day 90, the male rats in group-II after the establishment of type-2 diabetes mellitus, were divided in to two groups- group-IIA and group-IIB. Feeding on these eggs and chick muscles mixed diet in these groups of rats, all the abnormalities were restored and a considerable reduction in lipid peroxidation products and a significant increased in the activities of enzymes per se with reversal of Zn, Cu, Mg and Mn levels closer to the control group were recorded. The present data suggest that these modified egg and chick muscle are effective in ameliorating the oxidative stress in type-2 diabetes mellitus induced male rats

Effect of structured discharge teaching after hysterectomy

Background: Hysterectomy is the most common major surgical procedure underwent by women. And there is no proper discharge planning for women underwent hysterectomy.  The aim of the study was to assess and compare the self-care ability score of women underwent hysterectomy after implementation of structured discharge teaching in experimental and comparison group.Methods: The study was quantitative research approach using non-equivalent control group, post-test only design with 60 women underwent hysterectomy selected by purposive sampling technique from gynae ward of Maharishi Markandeshwar Institute of Medical Science & Research Hospital, Mullana. The post test data was collected by interview technique as 1st follow up visit of operation.Results: The mean score of self-care ability in experimental group (103.63 ± 4.327) was higher than mean score of comparison group (71.67 ± 4.737). The computed ‘t’ value was found to be statistically significant at 0.05 level of significant except personal hygiene and exercise. There was significant association of self-care ability score with days of postoperative stay which was found significant at 0.05 level of significant indicating that self-care ability score was dependent on days of postoperative stay >12 days.Conclusions: The findings revealed that the structured discharge teaching on self-care ability was effective on prevention of complication after hysterectomy. Therefore, it is recommended to develop a proper discharge planning protocol regarding self-care after hysterectomy for prevention of complication

Factors Affecting Residential Satisfaction in Slum Rehabilitation Housing in Mumbai

Affordable housing for the low-income population, who mostly live in slums, is an endemic challenge for cities in developing countries. As a remedy for the slum-free city, most of the major metropolis are resorting to slum rehabilitation housing. Rehabilitation connotes the improved quality of life that provides contentment, yet what entails residential satisfaction in such low-income situations remains a blind spot in literature. The study aims to examine the factors affecting residential satisfaction of slum rehabilitation housing in Mumbai, India. Here, the moderation effects of sociodemographic characteristics between residential satisfaction and its predictors are elaborated using a causal model. Data on residents’ perception of the residential environment were collected from 981 households in three different slum rehabilitation housing areas spatially spread across Mumbai. The causal model indicated that residential satisfaction was significantly determined by internal conditions of dwelling resulting from design, community environment and access to facilities. Gender, age, mother tongue, presence of children, senior citizens in the family, and education moderate the relationship between residential satisfaction and its predictors. The need for design and planning with the user’s perspective is highlighted to improve the quality of life

Tensor network annealing algorithm for two-dimensional thermal states

Tensor network methods have become a powerful class of tools to capture strongly correlated matter, but methods to capture the experimentally ubiquitous family of models at finite temperature beyond one spatial dimension are largely lacking. We introduce a tensor network algorithm able to simulate thermal states of two-dimensional quantum lattice systems in the thermodynamic limit. The method develops instances of projected entangled pair states and projected entangled pair operators for this purpose. It is the key feature of this algorithm to resemble the cooling down of the system from an infinite temperature state until it reaches the desired finite-temperature regime. As a benchmark, we study the finite-temperature phase transition of the Ising model on an infinite square lattice, for which we obtain remarkable agreement with the exact solution. We then turn to study the finite-temperature Bose-Hubbard model in the limits of two (hard-core) and three bosonic modes per site. Our technique can be used to support the experimental study of actual effectively two-dimensional materials in the laboratory, as well as to benchmark optical lattice quantum simulators with ultracold atoms