Day of the Week Effect in Cryptocurrencies' Returns and Volatility

Calendar anomalies as the seasonal tendencies in stock returns are the signal of irregular behaviour of stock markets. These anomalies have been comprehensively studied in many matured as well as emerging stock markets. But there is lack of exploration of calendar anomalies in the cryptocurrency market. So, the present treatise is an attempt to fill this lacuna by studying day of the week effect on cryptocurrencies' returns and volatility. This study is based on the prices of eight cryptocurrencies (viz. Bitcoin, EOS, Ethereum, Bitcoin Cash, Litecoin, Tether, XRP and Stellar) for a period starting from July 2017 and up to March 2020. The series of daily and day-wise returns were initially studied for stationarity using Ng-Perron tests and augmented Dickey–Fuller test. The results from these tests confirmed that the cryptocurrencies' return series are stationary. The day of the week effect on cryptocurrencies returns was studied by introducing the dummies for each day of the week in the ordinary least square regression equation. The residuals from the ordinary least square regression equation were tested for ARCH effect using Engle's ARCH test. The results from the test confirmed the presence of ARCH effect in all series. The GARCH (1,1) model and PARCH model were further applied to account for ARCH effect and these models confirmed the presence of the day of the week effect in all the cryptocurrencies' returns and volatility except for day of week effect in Bitcoin and Tether returns. So, the significant day of the week effect was present in all cryptocurrencies' returns and volatility but the significant day of the week effect was absent in Bitcoin's returns and Tether's returns. These findings of significant day effect may help the existing and potential investors in taking investment decision in contemporary scenario of no ban in cryptocurrency market in India

Improved Multiple Fusion Techniques Based Single Image Dehazing

In view of the unfavorable climate circumstances like the presence fog or overwhelming rain, computerized pictures are simply put through to a broad variety of assortment during acquisition, which may diminishes visual effect & affects post-processing of the picture. Pictures debased by mist adversely influence the class of vision-based physical security system. This prompts to accidents in air, on sea & on the road. In any case, for enhancing the picture appearance to a human viewer, or to change a picture to a format more suitable to machine processing, improving techniques ought to be utilized. After improvement is again re-established the improved picture via restoration techniques. Here, we enhance our image by applying propose method provide us better results when contrasted with base techniques. The output image is clearer in compare of base paper image and hollow effect is also reduced. In our propose algo in view of another, non-local prior. The algorithm depends on the suspicion that shades of a fog-free picture are well approximated via a pair of hundred particular colors that frame tight groups in RGB space. In this algorithm we use low pass filter & band pass filter for smoothing the image. Calculate the PSNR and Time.

BUOYANCY AND CHEMICAL REACTION EFFECTS ON MHD FREE CONVECTIVE SLIP FLOW OF NEWTONIAN AND POLAR FLUID THROUGH POROUSMEDIUM IN THE PRESENCE OF THERMAL RADIATION AND OHMIC HEATING WITH DUFOUR EFFECT

The present paper investigates the effects of thermal radiation, joule heating on an unsteady hydro magnetic free convective flow of a viscous electrically conductive Newtonian and polar fluid past a semi-infinite vertical plate embedded in a porous media in the presence of heat absorption, chemical reaction, slip flow and Dufour effect. Analytical perturbation solutions are obtained for the velocity, temperature and concentration fields as well as for the skin friction coefficient, Nusselt number and Sharewood number. The results are presented in graphical forms to study the effects of various parameters

An Investigation of Genome-Wide Studies Reported Susceptibility Loci for Ulcerative Colitis Shows Limited Replication in North Indians

Genome-Wide Association studies (GWAS) of both Crohn's Disease (CD) and Ulcerative Colitis (UC) have unearthed over 40 risk conferring variants. Recently, a meta-analysis on UC revealed several loci, most of which were either previously associated with UC or CD susceptibility in populations of European origin. In this study, we attempted to replicate these findings in an ethnically distinct north Indian UC cohort. 648 UC cases and 850 controls were genotyped using Infinium Human 660W-quad. Out of 59 meta-analysis index SNPs, six were not in the SNP array used in the study. Of the remaining 53 SNPs, four were found monomorphic. Association (p<0.05) at 25 SNPs was observed, of which 15 were CD specific. Only five SNPs namely rs2395185 (HLA-DRA), rs3024505 (IL10), rs6426833 (RNF186), rs3763313 (BTNL2) and rs2066843 (NOD2) retained significance after Bonferroni correction. These results (i) reveal limited replication of Caucasian based meta-analysis results; (ii) reiterate overlapping molecular mechanism(s) in UC and CD; (iii) indicate differences in genetic architecture between populations; and (iv) suggest that resources such as HapMap need to be extended to cover diverse ethnic populations. They also suggest a systematic GWAS in this terrain may be insightful for identifying population specific IBD risk conferring loci and thus enable cross-ethnicity fine mapping of disease loci

Dental caries in primary and permanent teeth in children's worldwide, 1995 to 2019: a systematic review and meta-analysis

Background: Early childhood caries (ECC) is a type of dental caries in the teeth of infants and children that is represented as one of the most prevalent dental problems in this period. Various studies have reported different types of prevalence of dental caries in primary and permanent teeth in children worldwide. However, there has been no comprehensive study to summarize the results of these studies in general, so this study aimed to determine the prevalence of dental caries in primary and permanent teeth in children in different continents of the world during a systematic review and meta-analysis. Methods: In this review study, articles were extracted by searching in the national and international databases of SID, MagIran, IranMedex, IranDoc, Cochrane, Embase, ScienceDirect, Scopus, PubMed, and Web of Science (ISI) between 1995 and December 2019. Random effects model was used for analysis and heterogeneity of studies was evaluated by using the I2 index. Data were analyzed by using the Comprehensive Meta-Analysis (Version 2) software. Findings: In this study, a total of 164 articles (81 articles on the prevalence of dental caries in primary teeth and 83 articles on the prevalence of dental caries in permanent teeth) were entered the meta-analysis. The prevalence of dental caries in primary teeth in children in the world with a sample size of 80,405 was 46.2% (95% CI: 41.6–50.8%), and the prevalence of dental caries in permanent teeth in children in the world with a sample size of 1,454,871 was 53.8% (95% CI: 50–57.5%). Regarding the heterogeneity on the basis of meta-regression analysis, there was a significant difference in the prevalence of dental caries in primary and permanent teeth in children in different continents of the world. With increasing the sample size and the year of study, dental caries in primary teeth increased and in permanent teeth decreased. Conclusion: The results of this study showed that the prevalence of primary and permanent dental caries in children in the world was found to be high. Therefore, appropriate strategies should be implemented to improve the aforementioned situation and to troubleshoot and monitor at all levels by providing feedback to hospitals

Knowledge of Adolescents Regarding HIV/AIDS

Abstract : Acquired Immune Deficiency Syndrome (AIDS) is a viral disease caused by Human Immunodeficiency Virus (HIV

Antireflective ultra-fast nano scale texturing for efficient multi-crystalline silicon solar cells

Minimization of reflection losses is extremely important for efficient silicon solar cells made either on mono crystalline (c-) or multi-crystalline (mc-) silicon (Si) substrates. A simple and fast etching process yet effective for nano-scale texturing of mc-Si surface using silver assisted wet chemical etching is reported. This results in very low reflecting (<3%) mc-Si surface in the broad (300-1100 nm) spectral range in a short duration (similar to 30 s) of etch time. The process is applied successfully to produce black mc-Si solar cell with n(+)-p-p(+) structure wherein n(+) emitter and p(+) back surface field are made by phosphorus and aluminum diffusion respectively. A significant increase (similar to 20%) in the short circuit current is observed in the nano-textured mc-Si solar cell as compared to the control cell (processed in the same batch) without any deleterious effect on other performance parameters. The improved performance of the nano-textured cell is also confirmed by light beam induced current measurements. It is a "proof of concept" of a simple, fast and inexpensive etching process to realize anti-reflective surface on mc-Si with improved solar cell performance and have potential for industrial solar cell application