Finding the unfound: Recovery of missing URLs through Internet Archive

The study investigated the accessibility and permanency of citations containing URLs in the articles published in DESIDOC Journal of Library and Information Technology journal during 2006-2015. A total of 2133 URL citations were identified out of which 823 were found to be incorrect or missing. HTTP-404 was the most common error message associated with the missing URLs. The study also tried to recover the incorrect or URL citations using Internet Archive and recovered a total of 484 (58.81%) missing URL citations

Impact of Reading habits on the Academic Achievements: A Survey

The present paper examines the impact of reading habits on the academic achievements of the students and faculty members in the universities of Karnataka state. The survey was conducted using a well design and structured questionnaire. A total of 2463 postgraduate students, research scholars and faculty members participated in the study. The study population consisted of an equal number of males (50.2%) and female (49.8%) and most of them (63%) are from rural areas. The study found that the majority of the respondents are from Science (48.8%) disciplines. The study found that almost all the respondents have reading habits and most of the them read at their home (69.1%), followed by university library (48.6%). It is very interesting to note that 57.7% of the respondents read books everyday. The study found that, most of the respondents preferred to read newspapers/magazines (69.5%), followed by books (58.9%). The study found that to a great extent, the majority of the respondents read various information sources, because they are interested in the topic of the study (53.2%). The study found that, the reading habit has made an impact on the academic achievements of the respondents. Further, it is found that reading habit has been acting as a channel for gaining real world of knowledge. Further, it also improved mental capacity and enhanced the reading skills in everyday life

Computer usage in teaching and learning among Indian Academics: Exploring the Gender disparity

This study aims to explore the gender disparity in Computer usage for teaching and learning among Indian academics. A total of 2463 samples were selected from 11 state universities in Karnataka, India. A well designed questionnaire was used to collect the data from the respondents. The result shows that, half of the male (50.2%) and female (49.8%) respondents used computer. Further, most of the male respondents used computer every day (58.0%) compared to female (42.0%) respondents. The present study found that majority of the respondents used computer for the research purpose (Male=55.6%, female=44.4%), followed by to read the e-books/e-journals, (Male=54.7%, female=45.3%) to prepare notes, to access Internet (Male=50.6%, female=49.4%), to prepare presentation slides (Male=50.1%, female=49.9%), to prepare class assignments (Male=49.1%, female=50.9%) and to improve typing skills (Male=51.8%, female=48.2%) and also to prepare project reports (Male=48.4%, female=51.6%)

Role of glucose in enhancing life and potency of Cirrhinus mrigala spermatozoa during cryopreservation

Cryopreservation of fish gametes is an emerging technology and breeding with cryopreserved gametes is advancement in fish seed production. Success of cryopreservation is evaluated by the post - thaw motility of the spermatozoa, an for which energy is required. Cryopreservation is known to cause changes in the seminal plasma that would alter the energy supply for the motility of the spermatozoa. Therefore, energy supplementation is found to be useful during cryopreservation. Cirrhinus mrigala spermatozoa were cryopreserved along with glucose as a co-cryoprotectant after 1:100 dilutions with 0.85% physiological saline as extender and Dimethyl Sulfoxide (DMSO) as cryoprotectant (85:15). The diluents contained glucose at four different concentrations, viz., T1 (0.25%), T2 (0.5%), T3 (0.75%) and T4 (1%). The diluted milt was equilibrated for 10 min at 5? C and loaded into 0.25 ml straws. The loaded straws were then frozen with LN2 vapour for 5 min and immersed in liquid nitrogen. Observations were made once in 7 days for 42 days on motility parameters based on which the duration, score, pattern and percentage were determined. The spermatozoa cryopreserved with glucose at 0.5% concentration showed the highest motility duration of 204±3.6 s whereas Control group showed motility duration of only 83.33± 4.5 s on 42nd day. The difference in motility duration was statistically significant (P>0.025).The present study revealed the benefits of adding glucose a t0.5% during cryopreservation as it could help in maintaining the motility duration and survival of spermatozoa

Research productivity on COVID-19: A Bibliometric approach

The study aimed to explore the perspective of COVID-19 publications across the globe. Further, attempts were also made to find out the most productive country, author, and institute in publishing literature on COVID-19. The data related study was retrieved from SCOPUS database. Various search strategies were used to retrieve publications on COVID-19 published between 1st December 2019 and 22nd June 2020. A total of 19,991 publications on COVID-19 were retrieved from the Scopus database. Further, it was found that Huazhong University of Science and Technology, China has produced 422 publications and received 5624 citations with an average citation of 13.327 per publication. BMJ Clinical Research Ed published 534 (1.61%) articles. Among the most productive authors, Wiwanitkit, Viroj from Hainan Medical University, China stands in the first place with 73 publications followed by Mahase, E. from the British Medical Journal, UK (52 publications) and Iacobucci, Gareth (48 publications). The study provided a relatively objective reference for peer scientists, national regimes, and the global health system. The findings of the study will definitely help the institutions as well as authors to get an opportunity to collaborate with regional, national and international research institutions and scientists

Magneto-optics of massive Dirac fermions in bulk Bi2Se3

We report on magneto-optical studies of Bi2Se3, a representative member of the 3D topological insulator family. Its electronic states in bulk are shown to be well described by a simple Dirac-type Hamiltonian for massive particles with only two parameters: the fundamental bandgap and the band velocity. In a magnetic field, this model implies a unique property - spin splitting equal to twice the cyclotron energy: Es = 2Ec. This explains the extensive magneto-transport studies concluding a fortuitous degeneracy of the spin and orbital split Landau levels in this material. The Es = 2Ec match differentiates the massive Dirac electrons in bulk Bi2Se3 from those in quantum electrodynamics, for which Es = Ec always holds.Comment: 5 pages, 3 figures and Supplementary materials, to be published in Physical Review Letter

Observation of epitaxially ordered twinned zinc aluminate “nanoblades” on c-capphire

We report the observation of a novel nanostructured growth mode of the ceramic spinel zinc aluminate grown on c-sapphire in the form of epitaxially ordered twinned crystallites with pronounced vertically aligned “nanoblades” on top of these crystallites. The nanostructures are formed on bare c-sapphire substrates using a vapour phase transport method. Electron microscopy images reveal the nanostructure morphology and dimensions and allow direct and indirect observation of the twin boundary location in a number of samples. The nanoblade structure with sharply rising sidewalls gives rise to a distinctive bright contrast in secondary electron images in scanning electron microscopy measurements

Curcumin-induced inhibition of cellular reactive oxygen species generation: novel therapeutic implications

There is evidence for increased levels of circulating reactive oxygen species (ROS) in diabetics, as indirectly inferred by the findings of increased lipid peroxidation and decreased antioxidant status. Direct measurements of intracellular generation of ROS using fluorescent dyes also demonstrate an association of oxidative stress with diabetes. Although phenolic compounds attenuate oxidative stress-related tissue damage, there are concerns over toxicity of synthetic phenolic antioxidants and this has considerably stimulated interest in investigating the role of natural phenolics in medicinal applications. Curcumin (the primary active principle in turmeric, Curcuma longa Linn.) has been claimed to represent a potential antioxidant and antiinflammatory agent with phytonutrient and bioprotective properties. However there are lack of molecular studies to demonstrate its cellular action and potential molecular targets. In this study the antioxidant effect of curcumin as a function of changes in cellular ROS generation was tested. Our results clearly demonstrate that curcumin abolished both phorbol-12 myristate-13 acetate (PMA) and thapsigargin-induced ROS generation in cells from control and diabetic subjects. The pattern of these ROS inhibitory effects as a function of dose-dependency suggests that curcumin mechanistically interferes with protein kinase C (PKC) and calcium regulation. Simultaneous measurements of ROS and Ca2+ influx suggest that a rise in cytosolic Ca2+ may be a trigger for increased ROS generation. We suggest that the antioxidant and antiangeogenic actions of curcumin, as a mechanism of inhibition of Ca2+ entry and PKC activity, should be further exploited to develop suitable and novel drugs for the treatment of diabetic retinopathy and other diabetic complications

Diversity, Phylogeny and Expression Patterns of Pou and Six Homeodomain Transcription Factors in Hydrozoan Jellyfish Craspedacusta sowerbyi

Formation of all metazoan bodies is controlled by a group of selector genes including homeobox genes, highly conserved across the entire animal kingdom. The homeobox genes from Pou and Six classes are key members of the regulation cascades determining development of sensory organs, nervous system, gonads and muscles. Besides using common bilaterian models, more attention has recently been targeted at the identification and characterization of these genes within the basal metazoan phyla. Cnidaria as a diploblastic sister group to bilateria with simple and yet specialized organs are suitable models for studies on the sensory organ origin and the associated role of homeobox genes. In this work, Pou and Six homeobox genes, together with a broad range of other sensory-specific transcription factors, were identified in the transcriptome of hydrozoan jellyfish Craspedacusta sowerbyi. Phylogenetic analyses of Pou and Six proteins revealed cnidarian-specific sequence motifs and contributed to the classification of individual factors. The majority of the Craspedacusta sowerbyi Pou and Six homeobox genes are predominantly expressed in statocysts, manubrium and nerve ring, the tissues with sensory and nervous activities. The described diversity and expression patterns of Pou and Six factors in hydrozoan jellyfish highlight their evolutionarily conserved functions. This study extends the knowledge of the cnidarian genome complexity and shows that the transcriptome of hydrozoan jellyfish is generally rich in homeodomain transcription factors employed in the regulation of sensory and nervous functions

Myocardial tagging by Cardiovascular Magnetic Resonance: evolution of techniques--pulse sequences, analysis algorithms, and applications

Cardiovascular magnetic resonance (CMR) tagging has been established as an essential technique for measuring regional myocardial function. It allows quantification of local intramyocardial motion measures, e.g. strain and strain rate. The invention of CMR tagging came in the late eighties, where the technique allowed for the first time for visualizing transmural myocardial movement without having to implant physical markers. This new idea opened the door for a series of developments and improvements that continue up to the present time. Different tagging techniques are currently available that are more extensive, improved, and sophisticated than they were twenty years ago. Each of these techniques has different versions for improved resolution, signal-to-noise ratio (SNR), scan time, anatomical coverage, three-dimensional capability, and image quality. The tagging techniques covered in this article can be broadly divided into two main categories: 1) Basic techniques, which include magnetization saturation, spatial modulation of magnetization (SPAMM), delay alternating with nutations for tailored excitation (DANTE), and complementary SPAMM (CSPAMM); and 2) Advanced techniques, which include harmonic phase (HARP), displacement encoding with stimulated echoes (DENSE), and strain encoding (SENC). Although most of these techniques were developed by separate groups and evolved from different backgrounds, they are in fact closely related to each other, and they can be interpreted from more than one perspective. Some of these techniques even followed parallel paths of developments, as illustrated in the article. As each technique has its own advantages, some efforts have been made to combine different techniques together for improved image quality or composite information acquisition. In this review, different developments in pulse sequences and related image processing techniques are described along with the necessities that led to their invention, which makes this article easy to read and the covered techniques easy to follow. Major studies that applied CMR tagging for studying myocardial mechanics are also summarized. Finally, the current article includes a plethora of ideas and techniques with over 300 references that motivate the reader to think about the future of CMR tagging