Free-text keystroke dynamics authentication for Arabic language

This study introduces an approach for user authentication using free-text keystroke dynamics which incorporates text in Arabic language. The Arabic language has completely different characteristics to those of English. The approach followed in this study involves the use of the keyboard's key-layout. The method extracts timing features from specific key-pairs in the typed text. Decision trees were exploited to classify each of the users' data. In parallel for comparison, support vector machines were also used for classification in association with an ant colony optimisation feature selection technique. The results obtained from this study are encouraging as low false accept rates and false reject rates were achieved in the experimentation phase. This signifies that satisfactory overall system performance was achieved by using the typing attributes in the proposed approach, while typing Arabic text

A Survey on Spoofing and Selective Forwarding Attacks on Zigbee based WSN

The main focus of WSN is to gather data from the physical world. It is often deployed for sensing, processing as well as disseminating information of the targeted physical environments. The main objective of the WSN is to collect data from the target environment using sensors as well as transmit those data to the desired place of choice. In order to achieve an efficient performance, WSN should have efficient as well as reliable networking protocols. The most popular technology behind WSN is Zigbee. In this paper a pilot study is done on important security issues on spoofing and selective forwarding attack on Zigbee based WSN. This paper identifies the security vulnerabilities of Zigbee network and gaps in the existing methodologies to address the security issues and will help the future researchers to narrow down their research in WSN.Keywords: Zigbee, WSN, Protocol Stack, Spoofing and Selective Forwarding

Investigation of keratinase activity by thermo-alkanophilic Nocardiopsis sp. SD6 isolated from feather waste soil / Subhasish Saha... [et. al.]

The aim of the study was to isolate keratinolytic actinobacteria from feather waste soil, poultry farm soil in Tiruchirappalli and Nammakkal District, Tamil Nadu, India and their keratinase activity were investigated by feather degradation. Totally 91 isolates were obtained from feather waste soil and poultry waste soil samples. Among the 91 isolates, 32 positive isolates were selected after grown on modified starch casein agar (SCA) medium with additional casein. All 32 proteolytic isolates were subjected for casein hydrolysis and four significant isolates were selected based on their growth on basal liquid medium containing chicken feather. The isolate SD6 was tentatively identified one of the best among 4 isolates. The isolate SD6 was characterized by morphological, biochemical and molecular property inducing 16s rRNA analysis based and has been identified as Nocardiopsis sp. SD6 (JF907189). The isolate was grown on modified starch casein broth (SCB). Supernatant from centrifuged culture was examined for protease and keratinase activity. The optimum temperature and pH for enzyme activity for both proteolytic and keratinolytic was found at 50°C, pH 8 respectively. Extracellular keratinase enzyme was separated from the culture supernatant by centrifugation and precipitated with ammonium sulphate (80% saturation) and followed by dialysis using dialysis membrane 150. Native PAGE was performed with the enzyme sample and visible bands were observed after de-staining. Zymogram gel electrophoresis was employed to identify the keratinase enzymes band and three bands in the gel were found with positive keratinase activity

A Rare Case of Extraosseous Ewing’s Sarcoma / Primitive Neuroectodermal Tumor in a Female

Introduction: Extraosseous Ewing\u27s sarcoma [EES] is a rare form of Ewing\u27s sarcoma that arises outside the bones in soft tissue structures. It is thought to result from a genetic abnormality involving the fusion of the EWSR1 gene with various partner genes, most commonly the FLI-1 gene. Common symptoms include pain, swelling, and sometimes a palpable mass at the site of the tumor. Diagnosis typically involves imaging studies such as magnetic resonance imaging [MRI], computed tomography [CT] scans, and biopsy for confirmation. Treatment typically includes a combination of chemotherapy, surgery to remove the tumor, and sometimes radiation therapy. Case Presentation: In this report we present a case of Extraosseous Ewing’s sarcoma in a 44 year old female who presented with the complaints of swelling in the right thigh for 3 months. The mass was soft in consistency with well delineated borders, evident both clinically and radiologically, extending into the subcutaneous layer and involving the right inguinal lymph nodes. The mass was widely excised with en-bloc dissection of the right inguinal nodes. The histopathological features confirmed the diagnosis and has been discussed in this study. Conclusions: This case underscores the clinical significance of extraosseous Ewing\u27s sarcoma, a rare variant presenting diagnostic challenges. Our findings highlight the importance of prompt diagnosis and early management to improve outcomes for patients with this aggressive malignancy

Serological and molecular characterization of Cucumber Mosaic Virus (CMV) infecting cucumber (Cucumis sativus L.) in southern Tamil Nadu

Cucumber Mosaic Virus (CMV) is a significant threat to cucumber (Cucumis sativus L.) cultivation, causing mosaic patterns, leaf crinkling, fruit distortion and stunting. This study investigates the serological and molecular characteristics of a CMV- Anantha nambi Nambi kuruchi isolate (CMV-ANK) collected from cucumber plants in major growing areas of Tamil Nadu. Host range studies revealed that CMV-ANK caused systemic infection in multiple crops and chlorotic lesions in okra, chenopodium and wild cucumber. The virus was confirmed using Triple Antibody Sandwich Enzyme-Linked Immunosorbent Assay (TAS-ELISA) and Reverse transcription polymerase chain reaction (RT-PCR) with Coat Protein (CP) gene-specific primers, producing a 1200 bp amplicon. Nucleotide sequencing demonstrated that 99.85 % identity with a CMV isolate from tomato (MZ298672), indicating close genetic similarity. Phylogenetic analysis showed that CMV-ANK clusters with other CMV isolates affecting various crops. Physical property analysis revealed a dilution endpoint at 10-5, thermal inactivation at 65 °C and longevity in vitro up to three days at room temperature and five days under refrigeration. Seed transmission studies confirmed an 83.33 % transmission rate through seeds from infected plants, reinforcing the risk of seed-borne spread. These findings underscore the adaptability and resilience of CMV-ANK, highlighting the need for effective disease management strategies, including the development of resistant cucumber varieties and integrated pest management. The insights gained from this study contribute to understanding CMV epidemiology and offer a foundation for future research aimed at controlling its impact on cucumber production