Intensity and Resolution Enhancement of Local Regions for Object Detection and Tracking in Wide Area Surveillance

Object tracking in wide area motion imagery is a complex problem that consists of object detection and target tracking over time. This challenge can be solved by human analysts who naturally have the ability to keep track of an object in a scene. A computer vision solution for object tracking has the potential to be a much faster and efficient solution. However, a computer vision solution faces certain challenges that do not affect a human analyst. To overcome these challenges, a tracking process is proposed that is inspired by the known advantages of a human analyst. First, the focus of a human analyst is emulated by doing processing only the local object search area. Second, it is proposed that an intensity enhancement process should be done on the local area to allow features to be detected in poor lighting conditions. This simulates the ability of the human eye to discern objects in complex lighting conditions. Third, it is proposed that the spatial resolution of the local search area is increased to extract better features and provide more accurate feature matching. A quantitative evaluation is performed to show tracking improvement using the proposed method. The three databases, each grayscale sequences that were obtained from aircrafts, used for these evaluations include the Columbus Large Image Format database, the Large Area Image Recorder database, and the Sussex database

ANTIPYRETIC ACTIVITY OF ANNONA PLANTS LEAVES ON BREWER'S YEAST INDUCED FEBRILE RATS

Objective: To evaluate and compare the in vivo antipyretic activity of the methanolic extracts of selected three Annona plant leaves.Methods: The acute oral toxicity determined by OECD class method and the in vivo antipyretic activity was determined by brewer's yeast inducedpyrexia method.Results: The results showed that the methanolic extract of leaves of Annona plants are non-toxic and possessed significant antipyretic effect whichmay be attributed to the presence of flavonoids and saponins in the extracts.Conclusion: This study provides evidences for the antipyretic activity of Annona squamosa, Annona reticulata and Annona muricata possess antipyreticactivity at the tested doses 100 and 200 mg/kg body weight without any side effects, which could partly contribute to its ethno medical use.Keywords: Annona squamosa L, Annona reticulata L, Annona muricata L, Antipyretic activity, Brewer's yeast

Increased yield of smear positive pulmonary TB cases by screening patients with >2 weeks cough, compared to >3 weeks and adequacy of 2 sputum smear examinations for diagnosis

Background RNTCP recommends examining three sputum smears for AFB from Chest Symptomatics (CSs) with cough of >3 weeks for diagnosis of Pulmonary TB (PTB). A previous multi-centric study from Tuberculosis Research centre (TRC) has shown that the yield of sputum positive cases can be increased if duration of cough for screening was reduced to >2 weeks. Other studies have shown that two smear examinations are adequate for diagnosis of smear positive PTB . To validate the above findings, a cross sectional multi-centric study was repeated in different settings in five geographical areas in India. Methods Three primary and secondary level health facilities with high out-patient attendance were selected from two Tuberculosis Units (TU) in each of the 15 selected districts to screen about 10,000 new adult outpatients from each state. For patients who did not volunteer history of cough, symptoms were elicited using a structured simple questionnaire. All the CSs were referred for sputum examination. Results A total of 96,787 out-patients were registered. Among them 69,209 (72%) were new adult out-patients. Using >2 weeks of cough instead of > 3 weeks as the criterion for screening, there was an overall increase of 58% in CS and 23% increase in the detection of smear-positive cases. Among 211 patients, 210 were positive at least by one smear from the initial two specimens. Increase in the work-load if 2 smears were done for patients with cough of >2 weeks cough were 2 specimens (i.e.13 to 15) per day for an adult OPD of 150. Conclusion The yield of sputum positive PTB cases can be improved by screening patients with >2 weeks cough and two specimens are adequate for diagnosis

Simulation Approach for Torque Ripple Minimization of BLDC Motor Using Direct Torque Control

ABSTRACT: The present paper is all about simulation approach for torque ripple minimization of BLDC motor using direct torque control. Brushless DC motors also known as electronically commutated motors where in torque ripples are minimized generally by using current control techniques but the present work mainly concentrate on advanced method for reduction of torque ripples in BLDC motor using the direct torque control. The whole drive system is simulated in MATLAB/SIMULINK based on the system devices, BLDC motor and inverter. The effectiveness of this method is shown through simulatio

Design and implementation methodology for rapid control prototyping of closed loop speed control for BLDC motor

This paper deals with rapid control prototyping implementation of closed loop speed control for a Brushless dc (BLDC) motor drive using dSPACE DS1103 controller board. Generally control algorithms which are developed for the motor drive might show good simulation results during steady state and transient conditions; however real-time performance of the drive greatly depends on execution of real time control software, speed and position measurements and data acquisition. The real challenge of hardware implementation lies in selecting appropriate hardware equipment and perfect configuration of the equipment with controller board. The dSPACE DS1103 controller board is suitable for high performance electric motor control as it has flexibility of converting the MATLAB/Simulink blocks into DSP enabled embedded code. In this paper a detailed procedure to effectively control the BLDC motor drive in real-time is presented. Keywords: BLDC motor, Rapid control prototyping, dSPACE, DS110

Enhanced electron emission from coated metal targets: Effect of surface thickness on performance

In this work, we establish an analytical formalism to address the temperature dependent electron emission from a metallic target with thin coating, operating at a finite temperature. Taking into account three dimensional parabolic energy dispersion for the target (base) material and suitable thickness dependent energy dispersion for the coating layer, Fermi Dirac statistics of electron energy distribution and Fowler’s mechanism of the electron emission, we discuss the dependence of the emission flux on the physical properties such as the Fermi level, work function, thickness of the coating material, and operating temperature. Our systematic estimation of how the thickness of coating affects the emission current demonstrates superior emission characteristics for thin coating layer at high temperature (above 1000 K), whereas in low temperature regime, a better response is expected from thicker coating layer. This underlying fundamental behavior appears to be essentially identical for all configurations when work function of the coating layer is lower than that of the bulk target work function. The analysis and predictions could be useful in designing new coated materials with suitable thickness for applications in the field of thin film devices and field emitters

Capability of polygonum cuspidatum extract in inhibiting AGEs and preventing diabetes

Diabetes is a metabolic disorder disease associated with advanced glycation end products (AGEs) and protein glycation. The effect of polygonum cuspidatum extract (PE) on AGEs and Nε‐(Carboxymethyl)‐L‐lysine formation, protein glycation, and diabetes was investigated. Six primary phenolics in a range of 12.36 mg/g for ellagic acid to 0.01 mg/g for piceid were determined in PE. In an intermediate‐moisture‐foods model, inhibition rate of PE was as high as 54.2% for AGEs and 78.9% for CML under aw 0.75. The protein glycation was also inhibited by PE. In a diabetic rat model, the levels of blood glucose, serum malondialdehyde, cholesterol, triglycerides, and low‐density lipoproteins were effectively reduced by PE treatment. The antioxidation capacity (T‐AOC) and superoxide dismutase (SOD) activity were also mediated by PE. Additionally, the activates of liver function‐related enzymes including alkaline phosphatase (ALP), glutamate pyruvate transaminase (GPT), and glutamate oxaloacetate transaminase (GOT) in diabetic rat were improved by PE