Evidence for a new pulsar wind nebula - Late time X-ray emission from Supernova 1970G

Core-collapse supernovae (SNe) are among the most powerful explosions in the universe that produce neutron stars, black-holes and some gamma-ray bursts. Late-time X-ray observations of SNe can provide important information about the critical phases a massive star evolves through as it approaches core collapse. Here we present new Chandra X-ray Observatory observations of the Type II SN 1970G and compare them with prior observations that had suggested its X-ray luminosity experienced a dramatic re-brightening between 2004-2011 breaking from a previous decades long decline. This unexpected increase could potentially be due to a black hole accreting mass or due to a Pulsar Wind Nebula (PWN). Assuming a distance to the host galaxy M101 of 7.4 Mpc, our 2017 observation shows an X-ray luminosity of (2.34 ± 1.3) x 10^37erg/s that is lower than the 2011 observation (4.1 ± 1.2) x 10^37erg/s but still higher than the 2004 value (1.1 ± 0.2) x 10^37erg/s. Our measurement, therefore, strengthens the argument for a potential new source that might be emitting at a constant X-ray output. The observed X-ray luminosity is higher than that of a typical PWN (10^35 ergs/s), but still consistent with what could be expected from a new PWN, as the pulsar is spinning down. Future monitoring of SN 1970G at radio wavelengths will be crucial to eliminate the possibility of interaction between the supernova’s forward blast wave and nearby circumstellar material. Continued X-ray measurements are also required to monitor possible changes in luminosity and to improve spectral fitting

Capturing and Analyzing Live Network Traffic in a Virtual Environment using Open Source IDS: Snort & Logging Alerts in MYSQL

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Hardware Based Traffic System for Visually Impaired Persons

Traffic lights and traffic crossings are very common spots found in each & every corner. Due to the inability of the vision, visually impaired persons face the dilemma every day. With the integration of various techniques developed by the researchers, this complication can easily be rectified. The researchers have proposed system which infers the use of voice synthesizer with the wireless module. The blind navigator system uses the ultrasonic sensors for detecting obstacles and distance measurement of the obstacle. But these systems are not compatible according to the present scenarios as today’s world need direct application with good security and strident usability. The proposed system makes use of wireless module, ultrasonic sensors, voice synthesizers and audio system. The essence of the interface of these modules is easily available. The proposed system also amends all the limitations of the system used for the integration

What impedes the success of late mover IT clusters despite economically favorable environments? A case study of an Indian IT cluster

The Information Technology (IT) industry in India, is one of the major contributors to the country’s growth story. It is organized in a few strong and dominant clusters across the country. Recent research focuses on the emergence, growth and success of the seven big IT clusters that account for 96.55  of total software exports from the country. Unlike the six successful late mover clusters, there are several other late mover IT clusters that have not experienced similar growth. Why do some of the late mover IT clusters in India succeed while others fail to take off despite favorable economic conditions? This paper applies a case study method to answer this research question by examining a single cluster, using both primary and secondary data. The paper concludes with a new framework to explain how an IT cluster lacks the motivation to succeed when it has to gain traction alongside the competing dynamics of traditional businesses. We find this to be the case more so when traditional businesses are thriving and growing

Neglected fracture shaft femur presenting with pseudoaneurysm: a case report

A pseudoaneurysm is a collection of blood leaking from a damaged arterial wall. Development of the false aneurysm is due to either initial injury of the vessel or is a complication of internal fixation of the femoral fracture. Femoral artery pseudoaneurysms (FAPs) may close spontaneously if the tear is small enough to allow for clotting and sealing. On the other hand, rupture of the aneurysm can trigger thrombosis, distal embolization and compression of adjacent structures. We present a case of left superficial femoral arterial pseudoaneurysm in a 36-year-old male with fracture of left femoral shaft. A 36-year-old male with history of road traffic accident presented to our institute with pain and swelling in left thigh. Patient was investigated and diagnosed with fracture left femoral shaft with a pseudoaneurysm of the left superficial femoral artery (SFA). Stenting was done for SFA followed by open reduction and internal fixation of the femoral shaft fracture. Such cases require multidisciplinary approach and a proper planning with involvement of different medical specialities to achieve optimal results and to minimise any intraoperative and post operative complications

On the Composition of Randomized Query Complexity and Approximate Degree

For any Boolean functions f and g, the question whether R(f?g) = ??(R(f) ? R(g)), is known as the composition question for the randomized query complexity. Similarly, the composition question for the approximate degree asks whether deg?(f?g) = ??(deg?(f)?deg?(g)). These questions are two of the most important and well-studied problems in the field of analysis of Boolean functions, and yet we are far from answering them satisfactorily. It is known that the measures compose if one assumes various properties of the outer function f (or inner function g). This paper extends the class of outer functions for which R and deg? compose. A recent landmark result (Ben-David and Blais, 2020) showed that R(f?g) = ?(noisyR(f)? R(g)). This implies that composition holds whenever noisyR(f) = ??(R(f)). We show two results: 1. When R(f) = ?(n), then noisyR(f) = ?(R(f)). In other words, composition holds whenever the randomized query complexity of the outer function is full. 2. If R composes with respect to an outer function, then noisyR also composes with respect to the same outer function. On the other hand, no result of the type deg?(f?g) = ?(M(f) ? deg?(g)) (for some non-trivial complexity measure M(?)) was known to the best of our knowledge. We prove that deg?(f?g) = ??(?{bs(f)} ? deg?(g)), where bs(f) is the block sensitivity of f. This implies that deg? composes when deg?(f) is asymptotically equal to ?{bs(f)}. It is already known that both R and deg? compose when the outer function is symmetric. We also extend these results to weaker notions of symmetry with respect to the outer function

Narcotic Drug Detection and Identification through Synchronous Fluorescence Technique

Illegal production of potentially hazardous narcotics as well as various psychotropic drugs is being carried out in the neighbouring countries and international market which is causing narco-terrorism a global havoc. Compared with traditional/natural drugs the synthetic drugs are more smuggled nowadays. Because of the vulnerability of the borders to drug trafficking, India has increased surveillance at borders and coasts and thus has tackled the problem to some extent. Authors developing a Narcotic drug sensor (point sensor) for detection and identification of Narcotic drugs based on Laser Induced Fluorescence more specifically Synchronous Fluorescence Spectroscopy in an effort. Some narcotic samples viz. Caffeine, Quinine and Tramadol were considered for the study. The fluorescence spectrum was studied using our own laboratory-based sensor incorporating charge coupled device-based Spectrometer and Laser source (266 nm wavelength) and commercial system from ‘Horiba Scientific’ incorporating Photomultiplier tube and Xe lamp source

On the Composition of Randomized Query Complexity and Approximate Degree

For any Boolean functions $f$ and $g$, the question whether $R(f\circ g) = \tilde{\Theta}(R(f)R(g))$, is known as the composition question for the randomized query complexity. Similarly, the composition question for the approximate degree asks whether $\widetilde{deg}(f\circ g) = \tilde{\Theta}(\widetilde{deg}(f)\cdot\widetilde{deg}(g))$. These questions are two of the most important and well-studied problems, and yet we are far from answering them satisfactorily. It is known that the measures compose if one assumes various properties of the outer function $f$ (or inner function $g$). This paper extends the class of outer functions for which $\text{R}$ and $\widetilde{\text{deg}}$ compose. A recent landmark result (Ben-David and Blais, 2020) showed that $R(f \circ g) = \Omega(noisyR(f)\cdot R(g))$. This implies that composition holds whenever noisyR(f) = \Tilde{\Theta}(R(f)). We show two results: (1)When $R(f) = \Theta(n)$, then $noisyR(f) = \Theta(R(f))$. (2) If $\text{R}$ composes with respect to an outer function, then $\text{noisyR}$ also composes with respect to the same outer function. On the other hand, no result of the type $\widetilde{deg}(f \circ g) = \Omega(M(f) \cdot \widetilde{deg}(g))$ (for some non-trivial complexity measure $M(\cdot)$) was known to the best of our knowledge. We prove that $\widetilde{deg}(f\circ g) = \widetilde{\Omega}(\sqrt{bs(f)} \cdot \widetilde{deg}(g)),$ where $bs(f)$ is the block sensitivity of $f$. This implies that $\widetilde{\text{deg}}$ composes when $\widetilde{\text{deg}}(f)$ is asymptotically equal to $\sqrt{\text{bs}(f)}$. It is already known that both $\text{R}$ and $\widetilde{\text{deg}}$ compose when the outer function is symmetric. We also extend these results to weaker notions of symmetry with respect to the outer function