Modifying Modern Power Systems Quality by Integrating Grid Computing Technology

The need for reliable, powerful, and clean power generation in power systems is becoming more importance. This need requires geographically-distributed power systems to be integrated as a single entity where among the main features of this integration are large data base and computing intensive. Hence the current power systems are not able to handle this huge datasets required for that integration, Grid Computing is a gateway to virtual storage media and processing power. This paper describes the research work on why grid computing is needed for power systems, what are the major challenges and problem to implement grid computing into power systems, and how grid computing can be utilized to fulfil the requirement for efficient power generation

Child Internet Protection System

Nowadays internets is becoming an amazing resource and provide hours of fun for kids. Clearly there are many benefits that result from Internet usage, but there is a side to the internet that can be worrying for any parent. Internet is explored, in particular: child sexual exploitation; children\u27s exposure to sexually explicit or offensive material, so there is need of a system which prevents child abuse from internet. Currently many systems are developed to prevent Internetrelated child abuse. In this paper, we have developed a web page classification model, which will protect children from harmful and offensive material available on internet. Our approach uses entropy term weighting scheme, Principal Component Analysis for feature reduction and Back propagation neural network as classifier. Our experiment result shows that our approach performed well as comparison to other approaches

Sums of matrix-valued wave packet frames in (L^2(ℝ^d,ℂ^{stimes r}))

The purpose of this paper is to first show relations between wave packet frame bounds and the scalars associated with finite sum of matrix-valued wave packet frames for the matrix-valued function space (L^2(ℝ^d, ℂ^{stimes r}). A sufficient condition with explicit wave packet frame bounds for finite sum of matrix-valued wave packet frames in terms of scalars and frame bounds associated with the finite sum of frames is given. An optimal estimate of wave packet frame bounds for the finite sum of matrix-valued wave packet frames is presented. In the second part, we show that the rate of convergence of the frame algorithm can be increased by using frame bounds and scalars associated with the finite sum of frames. Finally, a necessary and sufficient condition for finite sum of matrix-valued wave packet frames in terms of series associated with wave packet vectors is given

Autopsy: a value to primordial and primary prevention for lung diseases

Background: Lung disorders spectrums include congestion, oedema, various inflammatory lesions, chronic obstructive pulmonary diseases and neoplastic lesions. The clinical and radiological findings in respiratory diseases are nonspecific and therefore a histopathological study is essential. Autopsies are necessary to establish cause of death of the person with help of antemortem history and investigations to rule out lung lesions. Aims and objectives were to identify the histopathological spectrum of lung disease and frequency of various lung pathologies in respect to age and sex.Methods: The retrospective study of 285 lung autopsy specimens received were fixed and processed. Routine paraffin sectioning was done followed by hematoxylene and eosin (H and E) staining. Relevant clinical and postmortem findings, gross and microscopic examination findings were recorded.Results: Most common lung pathology found was Edema and congestion in 149 cases (52.2%), pneumonia in 87 cases (30.5%) followed by tuberculosis in 33 cases (11.5%). Out of total 285 cases, 222 (77.9%) were males and 63 cases (22.2%) were females. The male to female ratio was 3.5:1. Maximum numbers of cases, in age group of 31-45 years were 108 cases (37.89%) followed by in age group 46-60 years were 90 cases (31.57%) followed by age group of 16-30 years 15.8%.Conclusions: Advances in diagnostic technology have not reduced the value of autopsy for the study and evaluation of the disease process. It has become crucial for adopting correct prophylactic actions for primordial and primary prevention of pulmonary dysfunctions

Importance of bone marrow examination in cases of pancytopenia: A morphological study in a tertiary care center

Background: Anemia, leukopenia, and thrombocytopenia are all combined as pancytopenia. It could be a symptom of many diseases that directly or indirectly impact the bone marrow. The cause of pancytopenia, however, differs depending on the location. An essential step in determining the cause of pancytopenia is bone marrow aspiration (BMA). Aims and Objectives: This study aimed to determine the causes of pancytopenia and the morphology of the bone marrow in pancytopenia patients. Materials and Methods: This study was carried out over a year in the pathology department of a tertiary care facility in central India. Patients taking chemotherapy or radiation therapy were excluded from the study. Inclusion Criteria: Cases with hemoglobin <10 g/dL, total leukocyte count <4000/mm3, and platelet count <100,000/mm3 were included in this study. The patient’s posterior iliac crest was used for BMA. The Leishman stain was used to color BMA smears for microscopy. Results: This study comprised 51 cases of pancytopenia, with acute leukemia and megaloblastic anemia accounting for the majority (11 cases each out of 51), followed by dimorphic anemia (10/51), hypocellular marrow (9/51). The clinical symptom of generalized weakness and pallor was present in all instances (100%) and was followed by fatiguability (72%) and dyspnea (48%). The last two least frequent symptoms, lymphadenopathy, and hepatomegaly, were also present in many patients. A significant proportion of pancytopenia individuals experienced lymphadenopathy and hepatomegaly, which were the last two least prevalent appearances. Conclusion: In most cases, bone marrow aspiration in pancytopenia patients aids in determining the underlying reason. Understanding the illness process, planning future research, and managing cytopenia patients can all benefit from it

The EJC disassembly factor PYM is an intrinsically disordered protein and forms a fuzzy complex with RNA

The discovery of several functional interactions where one or even both partners remain disordered has demonstrated that specific interactions do not necessarily require well-defined intermolecular interfaces. Here we describe a fuzzy protein–RNA complex formed by the intrinsically unfolded protein PYM and RNA. PYM is a cytosolic protein, which has been reported to bind the exon junction complex (EJC). In the process of oskar mRNA localization in Drosophila melanogaster, removal of the first intron and deposition of the EJC are essential, while PYM is required to recycle the EJC components after localization has been accomplished. Here we demonstrate that the first 160 amino acids of PYM (PYM1–160) are intrinsically disordered. PYM1–160 binds RNA independently of its nucleotide sequence, forming a fuzzy protein–RNA complex that is incompatible with PYM’s function as an EJC recycling factor. We propose that the role of RNA binding consists in down-regulating PYM activity by blocking the EJC interaction surface of PYM until localization has been accomplished. We suggest that the largely unstructured character of PYM may act to enable binding to a variety of diverse interaction partners, such as multiple RNA sequences and the EJC proteins Y14 and Mago

Truncated hemoglobin, HbN, is post-translationally modified in Mycobacterium tuberculosis and modulates host-pathogen interactions during intracellular infection

Mycobacterium tuberculosis (Mtb) is a phenomenally successful human pathogen having evolved mechanisms that allow it to survive within the hazardous environment of macrophages and establish long term, persistent infection in the host against the control of cell-mediated immunity. One such mechanism is mediated by the truncated hemoglobin, HbN, of Mtb that displays a potent O2-dependent nitric oxide dioxygenase activity and protects its host from the toxicity of macrophage-generated nitric oxide (NO). Here we demonstrate for the first time that HbN is post-translationally modified by glycosylation in Mtb and remains localized on the cell membrane and the cell wall. The glycan linkage in the HbN was identified as mannose. The elevated expression of HbN in Mtb and M. smegmatis facilitated their entry within the macrophages as compared with isogenic control cells, and mutation in the glycan linkage of HbN disrupted this effect. Additionally, HbN-expressing cells exhibited higher survival within the THP-1 and mouse peritoneal macrophages, simultaneously increasing the intracellular level of proinflammatory cytokines IL-6 and TNF-α and suppressing the expression of co-stimulatory surface markers CD80 and CD86. These results, thus, suggest the involvement of HbN in modulating the host-pathogen interactions and immune system of the host apart from protecting the bacilli from nitrosative stress inside the activated macrophages, consequently driving cells toward increased infectivity and intracellular survival

Mycobacterium avium Infection in a C3HeB/FeJ Mouse Model

Infections caused by Mycobacterium avium complex (MAC) species are increasing worldwide, resulting in a serious public health problem. Patients with MAC lung disease face an arduous journey of a prolonged multidrug regimen that is often poorly tolerated and associated with relatively poor outcome. Identification of new animal models that demonstrate a similar pulmonary pathology as humans infected with MAC has the potential to significantly advance our understanding of nontuberculosis mycobacteria (NTM) pathogenesis as well as provide a tractable model for screening candidate compounds for therapy. One new mouse model is the C3HeB/FeJ which is similar to MAC patients in that these mice can form foci of necrosis in granulomas. In this study, we evaluated the ability of C3HeB/FeJ mice exposure to an aerosol infection of a rough strain of MAC 2285 to produce a progressive infection resulting in small necrotic foci during granuloma formation. C3HeB/FeJ mice were infected with MAC and demonstrated a progressive lung infection resulting in an increase in bacterial burden peaking around day 40, developed micronecrosis in granulomas and was associated with increased influx of CD4+ Th1, Th17, and Treg lymphocytes into the lungs. However, during chronic infection around day 50, the bacterial burden plateaued and was associated with the reduced influx of CD4+ Th1, Th17 cells, and increased numbers of Treg lymphocytes and necrotic foci during granuloma formation. These results suggest the C3HeB/FeJ MAC infection mouse model will be an important model to evaluate immune pathogenesis and compound efficacy

Cell Surface Remodeling of Mycobacterium abscessus under Cystic Fibrosis Airway Growth Conditions.

Understanding the physiological processes underlying the ability of Mycobacterium abscessus to become a chronic pathogen of the cystic fibrosis (CF) lung is important to the development of prophylactic and therapeutic strategies to better control and treat pulmonary infections caused by these bacteria. Gene expression profiling of a diversity of M. abscessus complex isolates points to amino acids being significant sources of carbon and energy for M. abscessus in both CF sputum and synthetic CF medium and to the bacterium undergoing an important metabolic reprogramming in order to adapt to this particular nutritional environment. Cell envelope analyses conducted on the same representative isolates further revealed unexpected structural alterations in major cell surface glycolipids known as the glycopeptidolipids (GPLs). Besides showing an increase in triglycosylated forms of these lipids, CF sputum- and synthetic CF medium-grown isolates presented as yet unknown forms of GPLs representing as much as 10% to 20% of the total GPL content of the cells, in which the classical amino alcohol located at the carboxy terminal of the peptide, alaninol, is replaced with the branched-chain amino alcohol leucinol. Importantly, both these lipid changes were exacerbated by the presence of mucin in the culture medium. Collectively, our results reveal potential new drug targets against M. abscessus in the CF airway and point to mucin as an important host signal modulating the cell surface composition of this pathogen

Stepwise pathogenic evolution of Mycobacterium abscessus.

Although almost all mycobacterial species are saprophytic environmental organisms, a few, such as Mycobacterium tuberculosis, have evolved to cause transmissible human infection. By analyzing the recent emergence and spread of the environmental organism M. abscessus through the global cystic fibrosis population, we have defined key, generalizable steps involved in the pathogenic evolution of mycobacteria. We show that epigenetic modifiers, acquired through horizontal gene transfer, cause saltational increases in the pathogenic potential of specific environmental clones. Allopatric parallel evolution during chronic lung infection then promotes rapid increases in virulence through mutations in a discrete gene network; these mutations enhance growth within macrophages but impair fomite survival. As a consequence, we observe constrained pathogenic evolution while person-to-person transmission remains indirect, but postulate accelerated pathogenic adaptation once direct transmission is possible, as observed for M. tuberculosis Our findings indicate how key interventions, such as early treatment and cross-infection control, might restrict the spread of existing mycobacterial pathogens and prevent new, emergent ones