Dieterici gas as a Unified Model for Dark Matter and Dark Energy

The dominance of dark energy in the universe has necessitated the introduction of a repulsive gravity source to make q0 negative. The models for dark energy range from a simple lambda-term to quintessence, Chaplygin gas, etc. We look at the possibility of how change of behaviour of missing energy density, from DM to DE, may be determined by the change in the equation of state of a background fluid instead of a form of potential. The question of cosmic acceleration can be discussed within the framework of theories which do not necessarily include scalar fields.Comment: 9 pages, 38 equation

ENABLING ANONYMOUS ENDORSEMENT IN CLOUDS WITH DECENTRALIZED ACCESS CONTROL

A decentralized access control scheme for data storage in clouds that supports anonymous authentication authentication. In this scheme, the cloud checks the validity of the series without knowing the user's identity before storing data. It also has the added feature of access control in which only valid users are able to decrypt the stored information. This prevents replay attacks and supports conception, variation, and reading data stored in the cloud. It also supports user revocation . This is an important property because a user, revoked of its attributes, might no longer be able to write to the cloud. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches

A- and B-Exciton Photoluminescence Intensity Ratio as a Measure of Sample Quality for Transition Metal Dichalcogenide Monolayers

The photoluminescence (PL) in monolayer transition metal dichalcogenides (TMDs) is dominated by recombination of electrons in the conduction band with holes in the spin-orbit split valence bands, and there are two distinct emission features referred to as the A-peak (ground state exciton) and B-peak (higher spin-orbit split state). The intensity ratio of these two features varies widely and several contradictory interpretations have been reported. We analyze the room temperature PL from MoS2, MoSe2, WS2, and WSe2 monolayers and show that these variations arise from differences in the non-radiative recombination associated with defect densities. Hence, the relative intensities of the A- and B-emission features can be used to qualitatively asses the non-radiative recombination, and thus the quality of the sample. A low B/A ratio is indicative of low defect density and high sample quality. Emission from TMD monolayers is governed by unique optical selection rules which make them promising materials for valleytronic operations. We observe a notably higher valley polarization in the B-exciton relative to the A-exciton. The high polarization is a consequence of the shorter B-exciton lifetime resulting from rapid relaxation of excitons from the B-exciton to the A-exciton of the valence band.Comment: Final version is published online at APL Material

Multiplicative Advantages of Hispanic Men Living in Hispanic Enclaves: Intersectionality in Colon Cancer Care

We examined Hispanic enclave paradoxical effects on cancer care among socioeconomically vulnerable people in pre-Obamacare California. We conducted a secondary analysis of a historical cohort of 511 Hispanic and 1,753 non-Hispanic white people with colon cancer. Hispanic enclaves were neighborhoods where 40% or more of the residents were Hispanic, mostly first-generation Mexican American immigrants. An interaction of ethnicity, gender and Hispanic enclave status was observed such that the protective effects of living in a Hispanic enclave were larger for Hispanic men, particularly married Hispanic men, than women. Risks were also exposed among other study groups: the poor, the inadequately insured, Hispanic men not residing in Hispanic enclaves, Hispanic women and unmarried people. Implications for the contemporary health care policy debate are discussed

Multiplicative Advantages of Hispanic Men Living in Hispanic Enclaves: Intersectionality in Colon Cancer Care: A Research Note

We examined Hispanic enclave paradoxical effects on cancer care among socioeconomically vulnerable people in pre-Obamacare California. We conducted a secondary analysis of a historical cohort of 511 Hispanic and 1,753 non-Hispanic white people with colon cancer. Hispanic enclaves were neighborhoods where 40% or more of the residents were Hispanic, mostly first-generation Mexican American immigrants. An interaction of ethnicity, gender, and Hispanic enclave status was observed such that the protective effects of living in a Hispanic enclave were larger for Hispanic men, particularly married Hispanic men, than women. Risks were also exposed among other study groups: the poor, the inadequately insured, Hispanic men not residing in Hispanic enclaves, Hispanic women, and unmarried people. Implications for the contemporary health care policy debate are discussed

ENABLING ANONYMOUS ENDORSEMENT IN CLOUDS WITH DECENTRALIZED ACCESS CONTROL

A decentralized access control scheme for data storage in clouds that supports anonymous authentication authentication. In this scheme, the cloud checks the validity of the series without knowing the user's identity before storing data. It also has the added feature of access control in which only valid users are able to decrypt the stored information. This prevents replay attacks and supports conception, variation, and reading data stored in the cloud. It also supports user revocation . This is an important property because a user, revoked of its attributes, might no longer be able to write to the cloud. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches

Study on isolation and characterisation of bacterial pathogens in orthopaedic implant associated infections in a tertiary care centre

INTRODUCTION: Orthopaedic device related infection (ODRI) remains a major complication in modern trauma and orthopaedic surgery. It is a challenging task to treat ODRIs which may lead to implant replacement and in severe cases amputation and even mortality. AIM OF THE STUDY: To isolate and identify organisms from post operative orthopaedic implant infections and determine their antibiogram, and to study the molecular characterisation of resistance genes. MATERIALS AND METHODS: This prospective study was conducted on patients with orthopaedic implant infections admitted in orthopaedic wards, Coimbatore Medical college Hospital, Coimbatore over a period of one year. Pus samples were collected aseptically using sterile swabs and sterile syringes for direct Gram’s stain, aerobic and anaerobic culture. Isolates were identified according to the standard protocols and antibiotic sensitivity was done by Kirby Bauer’s disc diffusion technique. RESULTS: Out of 137 implant infection cases 116 (85%) were culture positive and 21(15%) were culture negative. Gram positive cocci Staphylococcus aureus (29%) was the commonest isolate followed by Gram negative bacilli Klebsiella species (18%). Males (75%) are more commonly affected due to road traffic accident presenting with open fractures. In this study more number of early post operative infections (79%) are found, rather than delayed (13%) and late (8%) infections. Diabetes mellitus (36%) was the most common co-morbid condition found, apart from this proven risk factor, smoking and alcoholism were also noted (23%) and (21%) respectively. All the Gram positive cocci showed 100% sensitivity for Linezolid and Vancomycin. Among the Staphylococcus aureus, (67%) of the isolates were MSSA and (32.3%) were found MRSA. Genotyping by PCR, out of 11 MRSA strains 10 isolates were found positive for mecA gene. All the Gram negative bacilli and pseudomonas showed 100% sensitivity for Meropenem. Most of the Gram negative bacilli showed high level resistance to third generation cephalosporin’s. 62.5% of E Coli, 50% of Proteus species, and 47.6% of Klebsiella species were found to be ESBL producers (phenotypic confirmation by combined disk method). CONCLUSION: The incidence of multidrug resistance pathogens as a cause of implant infections is rising. This study clearly shows the changing trends of microbial isolates with special emphasis on the emergence of MRSA and ESBL strains in our hospital set up. The Diagnostic Microbiology thus plays a crucial role in this context, and aids the surgeons in the proper selection of antibiotics as per the Antibiotic policy guidelines issued by Hospital Infection Control Committee

Experimental and simulation characterisation of flexural vibration modes in unimorph ultrasound transducers

A unimorph flexural transducer design is proposed and tested with regard to mode shapes and frequencies. The transducers consist of a passive metal cap structure, and a thin piezoelectric disc, rigidly bonded to the inside. Extensive finite element (FE) modelling, and experimental 2D, time-resolved displacement measurements were done to characterise the transducers flexural properties, and to compare them to the analytical solutions of thin vibrating plates. Emphasis was put on characterising the passive layer of the unimorph structure, before bonding the piezoelectric element, to understand how the active element affects the behaviour of the flexing plate. A high power Nd:YAG laser was used to actuate the metal plate (non-contact), and the frequency content of the resulting displacement signal was analysed to identify the flexural modes. The non-axisymmetric modes, which are conventionally disregarded because of their unfavourable acoustic properties, were also taken into account. There was excellent agreement between the experimental results and the FE simulation data. There was good agreement with the analytical edge clamped plate model, but with some notable deviations, which have not previously been identified or commented upon. Specifically, the second axisymmetric mode is split into three separate modes, which is not explained by the traditional theory of vibrating plates

Effect of biofertilizers and micronutrients on growth, leaf yield and quality of coriander (Coriandrum sativum L.) cv. Sadhana

A field experiment was conducted during rabi 2015-16 at Research Farm, College of Horticulture, Dr.Y.S.R. Horticultural University, Anantharajupeta (Andhra Pradesh), India, to study the effect of different biofertilizers and micronutrients on growth, leaf yield and quality of coriander (Coriandrum sativum L.) cv. Sadhana. The experiment was conducted in a factorial randomized block design with biofertilizers and micronutrients. The biofertilizer treatments were seed inoculation with Azospirillum, Phosphate Solubilising Bacteria (PSB), Azospirillum + Phosphate Solubilising Bacteria (PSB) and control (without any biofertilizer), while the micronutrient treatments comprised of foliar sprays of Zinc sulphate, Copper sulphate, Ferrous sulphate each at @ 0.5% and control (without any micronutrient). The sixteen treatment combinations were replicated thrice. Among the treatments, seed inoculation with Azospirillum + PSB+ foliar spray of zinc sulphate @ 0.5% recorded maximum plant height, number of primary branches, leaf area, fresh leaf yield per plant, leaf yield per plot, leaf yield per hectare, dry matter production, protein content, ascorbic acid content and moisture content. While, the lowest days to germination and leaf chlorophyll contents were recorded with the seed inoculation of Azospirillum + PSB + foliar spray of ferrous sulphate @ 0.5%