Measurements of natural and artificial point discharge

Assuming spherical symmetry, an approximate form of the current voltage relationship has been derived for a single point and the constants involved verified experimentally in the laboratory, under controlled conditions. When a single point was replaced by a multiple-point system the total point-discharge current through the latter was found to be a function of the point separation and the clearance of the points from the H.T. plate. The current through a system of multiple-points of different starting voltages obeyed an approximate cube law, later derived theoretically, similar to the case of trees and small plants. The fraction of the point - discharge current in a living tree bypassed through a low resistance galvanometer has been found to increase with total point-discharge current, because the impedance of the tree in between the two electrodes increases and the reactance of the bypassing circuit decreases. Resistance of the tree was found to increase with time after application of the voltage and also to increase with decreasing voltage when measurements were made of steady currents; no such effect was observed with instantaneous currents. The effect of the wind on the point-discharge current through a single well as multiple-point system has been studied. The relation between the point-discharge current, point voltage and wind speed has been derived empirically, using a method of multiple regression analysis. The quantity of charge per pulse, as calculated from the ratio of the average current end frequency of the pulses, was always found to be greater than that calculated by integrating the pulse over the time of decay. When a wind was applied parallel to the electron current, the quantity of charge per pulse increased linearly at first and then reached a saturation stage; a very high wind was however needed to get any noticeable effect

Role of Whatsapp as a Teaching Aid to Enhance Learning Capabilities of Management Students

The liberalising of Business Education in 1990 by the Indian Government has resulted in a large number of management schools offering management courses at graduate and post graduate levels. In the last five years, the number of B-school seats has grown three times. Excluding the few top B-schools like IIMs, most of the B-schools in the country are churning “unemployable” graduates. The paper uses convenience sampling to collect data from students and faculty members of different B-schools in order to find out their usage of digital technologies like Whatsapp for teaching and learning. It also explains the use of digital technology in curriculum designing. This further helps them in placing students in good profiles and better packages as they are able to share more practical real time insights with them

How Did COVID-19 School Closures Affect Adolescents with ADHD?

COVID-19 school closures drastically affected school-aged youth and their parents, with greater challenges among youth with Attention Deficit/Hyperactivity Disorder (ADHD). This brief summarizes results from a recent study examining the risks, protective factors, and family processes that shaped well-being among adolescents during COVID-19-related school closures. Findings show that adolescents with ADHD were more likely to experience negative consequences from school closures, including difficulty adjusting to online learning, reduced socialization, and increased mental distress. However, youth and families also experienced some benefits, including increased family reconnection and reduced school-related anxiety

Data security issues in cloud scenarios

The amount of data created, stored, and processed has enormously increased in the last years. Today, millions of devices are connected to the Internet and generate a huge amount of (personal) data that need to be stored and processed using scalable, efficient, and reliable computing infrastructures. Cloud computing technology can be used to respond to these needs. Although cloud computing brings many benefits to users and companies, security concerns about the cloud still represent the major impediment for its wide adoption. We briefly survey the main challenges related to the storage and processing of data in the cloud. In particular, we focus on the problem of protecting data in storage, supporting fine-grained access, selectively sharing data, protecting query privacy, and verifying the integrity of computations

Lifestyle factors and primary glioma and meningioma tumours in the Million Women Study cohort

Previous studies have reported inconsistent results on the effect of anthropometric and lifestyle factors on the risk of developing glioma or meningioma tumours. A prospective cohort of 1.3 million middle-aged women was used to examine these relationships. During 7.7 million women-years of follow-up, a total of 1563 women were diagnosed with a primary incident central nervous system tumour: 646 tumours were classified as glioma and 390 as meningioma. Our results show that height is related to the incidence of all central nervous system tumours with a risk of about 20% per 10 cm increase in height (relative risk=1.19, 95% CI=1.10–1.30 per 10 cm increase in height, P<0.001): the risks did not differ significantly between specified glioma and meningioma. Body mass index (BMI) was also related to central nervous system tumour incidence, with a risk of about 20% per 10 kg m−2 increase in BMI (relative risk=1.17, 95% CI=1.03–1.34 per 10 kg m−2 increase in BMI, P=0.02). Smoking status, alcohol intake, socioeconomic level, parity, age at first birth, and oral contraceptive use were not associated with the risk of glioma or meningioma tumours. In conclusion, for women in the United Kingdom, the incidence of glioma or meningioma tumours increases with increasing height and increasing BMI