A Comparison of CP-OFDM, PCC-OFDM and UFMC for 5G Uplink Communications

Polynomial-cancellation-coded orthogonal frequency division multiplexing (PCC-OFDM) is a form of OFDM that has waveforms which are very well localized in both the time and frequency domains and so it is ideally suited for use in the 5G network. This paper analyzes the performance of PCC-OFDM in the uplink of a multiuser system using orthogonal frequency division multiple access (OFDMA) and compares it with conventional cyclic prefix OFDM (CP-OFDM), and universal filtered multicarrier (UFMC). PCC-OFDM is shown to be much less sensitive than either CP-OFDM or UFMC to time and frequency offsets. For a given constellation size, PCC-OFDM in additive white Gaussian noise (AWGN) requires 3dB lower signal-to-noise ratio (SNR) for a given bit-error-rate, and the SNR advantage of PCC-OFDM increases rapidly when there are timing and/or frequency offsets. For PCC-OFDM no frequency guard band is required between different OFDMA users. PCC-OFDM is completely compatible with CP-OFDM and adds negligible complexity and latency, as it uses a simple mapping of data onto pairs of subcarriers at the transmitter, and a simple weighting-and-adding of pairs of subcarriers at the receiver. The weighting and adding step, which has been omitted in some of the literature, is shown to contribute substantially to the SNR advantage of PCC-OFDM. A disadvantage of PCC-OFDM (without overlapping) is the potential reduction in spectral efficiency because subcarriers are modulated in pairs, but this reduction is more than regained because no guard band or cyclic prefix is required and because, for a given channel, larger constellations can be used

AWARENESS AND USE OF PUBLIC LIBRARY RESOURCES: A STUDY IN REGIONAL LIBRARY, TIRUPATI

The main purpose of this study was to examine the awareness and usage of library resources by the user in Regional Library of Tirupati. To achieve the objectives of the study, a survey method was conducted using convenient sampling method. Two hundred questionnaires have been distributed to the public library users. Out of two hundred questionnaires, one hundred and seventy usable response sheets were received. This study reveals that majority of the respondents (37.65%) visit library for updating subject knowledge, 32.94% to update their employment information. It is also clear that majority of the library users (83.5%) have ICT knowledge. But they need help for searching relevant information. It is suggested that sufficient budget, skilled manpower, ICT and physical facilities should be improved to fulfill the objectives of the public libraries

Space-Frequency Equalization for Broadband Single Carrier MIMO Systems

In this paper, a frequency domain (FD) receiver architecture implemented using estimated channel parameters is derived for broadband single carrier modulations. Co-channel and inter-symbol interferences are compensated by a minimum mean squared error based integrated space-frequency-equalizer (SFE) using the estimated parameters. The integrated SFE in the FD consists of coupled FIR structures, that are jointly optimized by maximizing the desired signal to interference plus noise ratio. We develop analytical expressions and present simulation results for the integrated SFE. Simulation results demonstrate that excellent receiver performance is achieved even for channels with large ISI spans. The proposed SC-SFE outperforms previous layered space frequency (LSF) receivers with imperfect channel knowledge. Further, the parallel receiver architecture yields equal diversity gains to all data streams without the error propagation that is common to most LSF schemes

Preferential Killing of Cancer Cells and Activated Human T-Cells Using ZnO Nanoparticles

Here we disclose the response of normal human cells to ZnO nanoparticles under different signaling environments and compare it to the response of cancerous cells. ZnO nanoparticles exhibit a strong preferential ability to kill cancerous T cells (-28-35X) compared to normal cells. Interestingly, the activation state of the cell contributes toward nanoparticle toxicity as resting T cells display a relative resistance while cells stimulated through the T cell receptor and CD28 costimulatory pathway show greater toxicity in direct relation to the level of activation. The novel findings of cell selective toxicity towards potential disease causing cells indicate a potential utility of ZnO nanoparticle in the treatment of cancer and/or autoimmunity

High Quality, Transferable Graphene Grown on Single Crystal Cu(111) Thin Films on Basal-Plane Sapphire

The current method of growing large-area graphene on Cu surfaces (polycrystalline foils and thin films) and its transfer to arbitrary substrates is technologically attractive. However, the quality of graphene can be improved significantly by growing it on single-crystal Cu surfaces. Here we show that high quality, large-area graphene can be grown on epitaxial single-crystal Cu(111) thin films on reusable basal-plane sapphire (alpha-Al2O3(0001)) substrates and then transferred to another substrate. While enabling graphene growth on Cu single-crystal surfaces, this method has the potential to avoid the high cost and extensive damage to graphene associated with sacrificing bulk single-crystal Cu during graphene transfer.Comment: 10 pages, 3 figure

Avitaminoses A and

Call number: LD2668 .T4 1965 R214Master of Scienc

Pharmacokinetics of articaine hydrochloride and its metabolite articainic acid after subcutaneous administration in red deer (Cervus elaphus)

“This is an Accepted Manuscript of an article published by Taylor & Francis in New Zealand Veterinary Journal on 23 October 2017, available online: https://www.tandfonline.com/doi/full/10.1080/00480169.2017.1391141”Publishe

Fluorescent Particles Comprising Nanoscale ZnO Layer and Exhibiting Cell-Specific Toxicity

Multifunctional smart nanostructures are disclosed that include fluorescein isothiocyanate (FITC)-encapsulated SiO2 core-shell particles with a nanoscale ZnO finishing layer, wherein an outer ZnO layer is formed on the SiO2-FITC core. These ~200 nm sized particles showed promise toward cell imaging and cellular uptake studies using the bacterium Escherichia coli and Jurkat cancer cells, respectively. The FITC encapsulated ZnO particles demonstrated excellent selectivity in preferentially killing Jurkat cancer cells with minimal toxicity to normal primary immune cells (18% and 75% viability remaining, respectively, after exposure to 60 μg/mL) and inhibited the growth of both gram-positive and gram-negative bacteria at concentrations .gtoreq.250-500 μg/mL (for Staphylococcus aureus and Escherichia coli, respectively). These results indicate that the FITC encapsulated multifunctional particles with nanoscale ZnO surface layer can be used as smart nanostructures for particle tracking, cell imaging, antibacterial treatments and cancer therapy

A Study of hypomagnesemia in critically ill patients and its correlation with patient outcomes

Background: Magnesium (Mg) is essential for life and plays a key role in the human body's various biochemical and physiological processes. Hypomagnesemia is common in all hospitalized patients, especially with co-existing electrolyte abnormalities in critically ill patients. Hypomagnesemia, if not diagnosed on time and appropriately treated, can cause serious and potentially fatal complications and is associated with increased mortality.Aim and Objectives: To study hypomagnesemia in critically ill patients and its correlation with patient outcomes considering the following parameters: Age, Sex, Diabetic status, Association with other lab parameters, APACHE II score, Need for ventilator support, Length of stay in ICU, Total stay in the hospital, Mortality.Materials and Methods: The study was a prospective study done in the Department of General Medicine (Medical ICU), Sri Ramachandra Medical College and Research Institute from September 2016 to August 2017. A thorough clinical examination was done; clinical data were recorded into the EXCEL case sheet. Serum calcium, serum potassium, ABG, along with other basic labs was sent for all patients. APACHE II score was calculated and all parameters were entered into an excel sheet. The results of the study were analyzed and statistical data was summarized using SPSS 17 software. Pearson Correlation, Kendall Tau B, Student t-test, and ANOVA were done for specific variables.Results: A total of 1067 patients admitted in ICU between September 2016 to August 2017 were taken into the study out of which 169 patients had hypomagnesemia (< 1.8 mg/ dl). Various correlations were analyzed for age, sex, diabetic status, APACHE II score, serum calcium, serum potassium, ventilator requirement, ICU stay, hospital stay, and outcome. A total of 169 patients out of 1067 patients had hypomagnesemia in the present study (15.83%). The minimum magnesium value was 0.8 mg/dl and the maximum value was 1.7 mg/dL. The present study highlighted the importance of hypomagnesemia in intensive care unit and its outcome with various parameters. The present study showed that hypomagnesemia is associated with increased APACHE II score, increased incidence of ventilator requirement and higher mortality.Conclusion: Magnesium is an unrecognized cation in critically ill patients. The incidence of hypomagnesemia in the present study was less compared to other studies done in medically ill patients. Hypomagnesemia correlated well with APACHE II score, ventilator requirement, and mortality, which was statistically significant.&nbsp