Comparison of Power flow Enhancement for varying loads using different Controllers

The power demand is continuously increasing due to population growth and changes in lifestyle. Due to shortage of generation and transmission facilities it is desired to increase the existing transmission line power transfer capacity in order to meet the rising demand. Fixed capacitors(FC) and TCSC FACTS device are used to increase the power flow of the line .The advantage in TCSC is that it provides variable compensation instead of fixed compensation by FC. In the present work the comparison of power flow enhancement by fixed capacitors , single TCSC and two modules of TCSC are done for three cases . The three cases are load is suddenly increased and decreased, load is suddenly decreased and increased, load is increased and then further increased. Various Power quality issues like voltage sag ,voltage swell are discussed. The THD voltage and receiving end voltage with different controllers/devices are shown. The power flow is more with TCSC in the system than with FC. The power flow is further enhanced using two modules of TCSC in the system

Security Issues in Data Warehouse

Data Warehouse (DWH) provides storage for huge amounts of historical data from heterogeneous operational sources in the form of multidimensional views, thus supplying sensitive and useful information which help decision-makers to improve the organization’s business processes. A data warehouse environment must ensure that data collected and stored in one big repository are not vulnerable. A review of security approaches specifically for data warehouse environment and issues concerning each type of security approach have been provided in this paper

Efficacy of Endoscopic Third Ventriculostomy for Obstructive Hydrocephalus

Objective: To assess efficacy of Endoscopic Third Ventriculostomy for Obstructive Hydrocephalus. Study Design: Cross – sectional observational study. Materials and Methods: This study was conducted from July 2012 to June 2014 at the department of Neurosurgery, PGMI, Lahore General Hospital, Lahore. Patients with obstructive hydrocephalus due to aqueductal stenosis, tectal and non-tectal tumor and already shunted patients for obstructive hydrocephalus presented with blocked shunt were included in the study. The exclusion criteria consisted of patient’s age < 6 months, previous history of ETV, recurrent tumor, patients with congenital hydrocephalus and secondary to meningitis or intra ventricular hemorrhage. Endoscopic third Ventriculostomy was performed in all patients. Success, complications and mortality was noted. Data was analyzed by descriptive statistics using SPSS software version 17. Results: Out of 60 patients, 34 (56.6%) were males and 26 (43.4%) were females, ranging in age from 1 – 45 years. The maximum numbers of patients were in their two decade of life. ETV had successful outcome in 46 (76.7%) patients. Complications were observed in 14 (23.3%) cases including inadequate Ventriculostomy (8.33%), CSF leak (1.7%), ventricular bleed (1.7%), meningitis (1.7%) and seizures (6.67%). Two patients (3.33%) died in our study on follow up Conclusion: Endoscopic Third Ventriculostomy is a very effective procedure for the treatment of obstructive hydrocephalus. Abbreviations: ETV: Endoscopic Third Ventriculostomy. CSF: Cerebrospinal Fluid. OHC: Obstructive Hydrocephalus

Network analysis of global stock markets at the beginning of the coronavirus disease (Covid-19) outbreak

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Analysis of Risks Faced by Information Technology Offshore Outsourcing Service Providers

To gain competitive advantage, organisations are considering information technology (IT) outsourcing as a strategic option by concentrating on their core operations and by reducing their operating costs. Many organisations are offering outsourcing services from various parts of the world. There are certain risks factors which IT outsourcing service providers come across while managing their service operations. Risk-related data from 50 Indian IT outsourcing service providers about their risks and concerns have been collected and archived. This study identifies risks from the providers’ perspective in regard to offshore outsourcing and put forward some guidelines to mitigate such risks

Inoculant rhizobia suppressed root-knot disease, and enhanced plant productivity and nutrient uptake of some field-grown food legumes

The potential effect of rhizobial inoculation on root knot nematodes in chickpea, mungbean and pigeonpea were studied under field condition. The seed treatment with respective rhizobium strains increased the nodulation, leghemoglobin content, bacteriod population, plant growth, yield and nitrogen uptake of three three food legumes compared to the plants without the rhizobium treatment. The nematode (1500 juveniles/kg soil) incited oval galls on the roots of the three legumes, and suppressed plant growth and yield. The galling, egg mass production and soil population of the nematode was greater on the plants without the rhizobium treatment. The pure culture and culture filtrate of the rhizobium strains suppressed the egg hatching and induced mortality to the juveniles of M. incognita over control. The nematode infection reduced the nodulation, bacteroid population and leghemoglobin contents of the nodules and NPK uptake by the plants. Hence, the rhizobia treatment shall be integrated to common agronomic practice of food legume cultivation so as to enhance crop productivity and to protect roots from nematode attack

Measuring routine childhood vaccination coverage in 204 countries and territories, 1980–2019: a systematic analysis for the Global Burden of Disease Study 2020, Release 1

10.1016/s0140-6736(21)00984-3The Lancet39810299503-52