Masquerade detection using Singular Value Decomposition

Information systems and networks are highly susceptible to attacks in the form of intrusions. One such attack is by the masqueraders who impersonate legitimate users. Masqueraders can be detected in anomaly based intrusion detection by identifying the abnormalities in user behavior. This user behavior is logged in log files of different types. In our research we use the score based technique of Singular Value Decomposition to address the problem of masquerade detection on a unix based system. We have data collected in the form of sequential unix commands ran by 50 users. SVD is a linear algebraic technique, which has been previously used for applications like facial recognition. We present experimental results and we analyze the effectiveness and efficiency of this SVD-based masquerade detection

PROACTIVE IDENTITY PRE-SHARED KEY CACHE FOR WIRELESS CLIENTS AT WIRELESS LOCAL AREA NETWORK CONTROLLER OR ACCESS POINT

Techniques are described herein for downloading an Identity Pre-Shared Key (iPSK) passphrase to an Access Point (AP) before Simultaneous Authentication of Equals (SAE) is initiated. iPSK may be an individual PSK per client Media Access Control (MAC) address. This may help support Wi-Fi® Protected Access 3 (WPA3) SAE clients

Posterior capsular infiltration with local anaesthetic cocktail during total knee arthroplasty: a prospective comparative study

Background: Total knee arthroplasty offers a stable joint with excellent long-term results in osteoarthritis knee patients. The procedure is also associated with post-operative pain which can lead to delayed functional recovery in few patients. This comparative study was aimed to evaluate the effiсасy of а lосаl anaesthetic сосktаil injection with and without роsteriоr сарsulаr infiltration for роst-орerаtive раin соntrоl and early functional reсоvery in раtients undergoing simultaneous bilateral TKА.Methods: This was a prospective comparative study which involved 50 participants undergoing bilateral TKA where one knee, received LIA in anterior, medial and lateral structures of the knee as well as posterior capsule (group A) and contralateral knee received LIA in anterior, medial and lateral structures, identical to the former knee, but excluding posterior capsule region (group B). Pre-operative and post-operative parameters such as VAS, KSS and knee ROM in both knees of all the patients were noted and compared to evaluate the efficacy of PCI.Results: Comparison of VAS scores, post-operatively showed that VAS on rest and on movement was lower in group A than group B at all the time frames (p value <0.0001*). Post-operative knee ROM was higher in group A (p<0.0001). Knee society score was observed to be higher in group A than group B on 15th day and at 1 month (p<0.0001).Conclusions: The study successfully demonstrates that posterior capsular infiltration when included in LIA technique provides a better pain control and also early functional recovery after TKA

Total hip replacement in a black hip: a case report and review of literature

Alkaptonuria is a rare metabolic disease leading to the accumulation of a blue-black pigment namely homogentisic acid in the cartilaginous tissue and body fluids giving them a black color. It is an autosomal recessive disease due to the deficiency of the hepatic enzyme oxidase which results in the accumulation of homogentisic acid in the skin, cartilage, and collagenous tissue giving them a black color. Herein we report a case of 65 years old gentleman who presented to our emergency department post domestic fall on his left hip, after which pain and swelling developed around the left hip and he was unable to bear weight with restricted mobility around the same

Rotating hinge knee as a means of limb salvage in a patient operated on five times for periprosthetic joint infection: from despairs of darkness to lights of joy!

The demand for revision knee arthroplasty is increasing daily with the increase in the number of patients undergoing primary knee arthroplasty. The aim of revision arthroplasty therefore should be the restoration of the mechanical alignment of the limb with the restoration of joint line and biomechanics and these goals should be accomplished with the least possible use of constrained implants which otherwise depends on the degree of bone defects and integrity of collateral ligaments. We have hereby reported a case of a 51-year-old lady operated on five times before who was financially drained, mentally and psychologically depressed with the patient and her relative’s considering amputation of the limb as a last resort

Context-Aware Spectrum Coexistence of Terrestrial Beyond 5G Networks in Satellite Bands

Spectrum sharing between terrestrial 5G and incumbent networks in the satellite bands presents a promising avenue to satisfy the ever-increasing bandwidth demand of the next-generation wireless networks. However, protecting incumbent operations from harmful interference poses a fundamental challenge in accommodating terrestrial broadband cellular networks in the satellite bands. State-of-the-art spectrum-sharing policies usually consider several worst-case assumptions and ignore site-specific contextual factors in making spectrum-sharing decisions, and thus, often results in under-utilization of the shared band for the secondary licensees. To address such limitations, this paper introduces CAT3S (Context-Aware Terrestrial-Satellite Spectrum Sharing) framework that empowers the coexisting terrestrial 5G network to maximize utilization of the shared satellite band without creating harmful interference to the incumbent links by exploiting the contextual factors. CAT3S consists of the following two components: (i) context-acquisition unit to collect and process essential contextual information for spectrum sharing and (ii) context-aware base station (BS) control unit to optimize the set of operational BSs and their operation parameters (i.e., transmit power and active beams per sector). To evaluate the performance of the CAT3S, a realistic spectrum coexistence case study over the 12 GHz band is considered. Experiment results demonstrate that the proposed CAT3S achieves notably higher spectrum utilization than state-of-the-art spectrum-sharing policies in different weather contexts

Analysis of Pressurized Water Reactor Primary Coolant Leak Events Caused by Thermal Fatigue

We present statistical analyses of pressurized water reactor (PWR) primary coolant leak events caused by thermal fatigue, and discuss their safety significance. Our worldwide data contain 13 leak events (through-wall cracking) in 3509 reactor-years, all in stainless steel piping with diameter less than 25 cm. Several types of data analysis show that the frequency of leak events (events per reactor-year) is increasing with plant age, and the increase is statistically significant. When an exponential trend model is assumed, the leak frequency is estimated to double every 8 years of reactor age, although this result should not be extrapolated to plants much older than 25 years. Difficulties in arresting this increase include lack of quantitative understanding of the phenomena causing thermal fatigue, lack of understanding of crack growth, and difficulty in detecting existing cracks

Parental High-Fat Diet Promotes Inflammatory and Senescence-Related Changes in Prostate

Background. Obesity and dietary habits are associated with increased incidences of aging-related prostatic diseases. The present study was aimed to investigate transgenerational effects of chronic high-fat diet (HFD) feeding on inflammation and senescence-related changes in prostate. Methods. Sprague-Dawley rats were kept on either normal or HFD one. Senescence-associated β-galactosidase (SA β-gal) activity, inflammation, and cellular proliferation were determined in the prostate. Results. Increased SA β-gal activity, expression of p53, and cell proliferation marker PCNA were observed in ventral prostate of HFD-fed rats. Immunostaining for p53 and PCNA revealed that the p53 immunopositive cells were primarily in stroma while PCNA immunopositive cells were epithelial cells. An increase in expression of cycloxygenase-2 (COX-2) and phosphorylation of nuclear factor-kappa B (NF-kB) was observed in prostate of weaning pups HFD-fed parents. However, in adult pups, irrespective of dietary habit, a significant increase in the expression of COX-2, PCNA, phosphorylation of NF-kB, infiltration of inflammatory cells, and SA β-gal activity was observed. Conclusions. Present investigation reports that HFD feeding promotes accumulation of p53 expressing cells, proliferation of epithelial cells, and senescence-related changes in prostate. Further, parental HFD-feeding upholds inflammatory, proliferative, and senescence-related changes in prostate of pups