Measurement of turbulence and pitch of the airstream in the 5' × 7' tunnel of Indian Institute of Science

This article does not have an abstract

Reaction of Bis(diethyl dithiocarbamato)nickel(II) with 4-Methyl- & 4-Vinyl-pyridines

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Magnetohydrodynamic Couette Flow and Heat Transfer in a Rotating System

The influence of electrode geometry for the MHD Couette flow in the presence of the Hall current and heat transfer of a conducting liquid in a rotating system has been studied

Preparation of transversely isotropic test specimen of natural FRP composite - an innovative approach-II

Fiber Reinforced Plastic (FRP) composites can be broadly classified as synthetic and natural, based on the type of fibers incorporated. Abundantly available natural fibers like toddy palm, sisal, jute and banana are attracting the attention of researchers due to ever increasing demand for lighter, stronger and eco-friendly materials from the industry. However, natural fibers are limited in length, not so uniform in size and behave differently in different atmospheric conditions. Added to this, the inherent tendency of natural fibers to twist and curl in dry conditions poses many problems to researchers while preparing test specimens. Researchers in general and academicians in particular are handicapped by non-availability of relevant literature on fabrication techniques to prepare natural FRP composite test specimens close to their analytical models. Present paper addresses typical problems faced by researchers during preparation of unidirectional continuous fiber reinforced composite test specimen ensuring transversely isotropic nature. Using simple hand tools coupled with a few precautions taken as described herein, prospective researchers can condition natural fibers and prepare composite specimen to suit their requirements.&nbsp

Preparation of transversely isotropic test specimen of glass FRP composite - an innovative approach-I

FRP composites have attracted attention of researchers due to ever increasing demand for lighter and stronger materials from the industry, more so from aerospace and automotive sector. Researchers, particularly in academic institutions, are suffering due to non-availability of detailed information on fabrication techniques for preparing FRP test specimens that are equivalent to an analytical model. Accurate test specimen close to analytical model reduces the compulsion of going for unrealistic assumptions that takes the analysis away from reality. An easy to follow method to design, compute and achieve correct volume fraction is presented in this work. A technique for preparing and dismantling molds with commonly available materials is presented in detail. Using simple tools and tackles coupled with a few precautions followed as described herein, prospective researchers can fabricate FRP test specimen close to their requirement.&nbsp

Oxygen delivery system in pre-hospital emergency care in india GVK EMRI 108: a review article

The goal of an effective emergency medical system should be to provide universal emergency care along with assured quality. Oxygen is often used drug in the pre hospital. Oxygen delivery can be monitored by pulse oximetry, typically with a goal of reversing hypoxemia. This paper describes the importance of oxygen in emergency care and its contribution to reducing avoidable death and disability. It also highlights the oxygen delivery systems and training processes /protocols in ambulance based pre-hospital care. In addition, it also shares the usage rates of oxygen and delivery methods in thermal and electrical burns in 108 GVK EMRI, India ambulances. A descriptive study methodology was adopted for explaining the training and pre-hospital care processes of oxygen delivery. Retrospective study method was adopted to measure the oxygen utilization rates in management of burns cases in 108 ambulances in the year 2015. EMTs consistently assessed vitals and provided oxygen to patients’. When EMTs found that patients’ had oxygen saturation less than 95%, they provided supplemental oxygen 95% of the times. EMTs though adhering to the routine use of oxygen in 9 out of 10 cases “where indicated, refresher training should focus on use of oxygen in special circumstances and the benefit to be closely monitored for favourable clinical outcomes”. There is a need to study such common and important essential pre-hospital interventions in all types of emergencies being served

Fertilization, Soils and Cultural Practices CROPLOGGING AS A MEANS OF CONTROLLING SUGARCANE FERTILIZATION IN SMALL HOLDINGS

ABSTRACT The results of logging sugarcane crops in small holdings distributed over 6 sugar factory zones in Andhra Pradesh (India) have been presented in order to indicate the relationship between nutrient indices of crops given different levels of N and cane yield. I n the 152 holdings about which information has been presented in this paper, 3 varieties, viz, Co 419, Co 527 and Co 997 were involved. The findings indicated that 3-6 leaf sheath moisture in the first 4 months and at harvest may be taken as a reliable guide for prediction of cane yields and quality of the crop, respectively. Completion of N fertilization within 4 months and provision of adequate irrigation, especially, in this period were noted to result in maintenance of optimum sheath moisture values at appropriate times, leading to good cane yields of satisfactory quality

Enhancement of pigeonpea productivity through adoption of drought mitigating strategies

Pigeonpea (Cajanus cajan (L.) Millspaugh) is an important drought tolerant legume crop in Indian rainfed agriculture. Though India accounts for nearly 90% of the world’s pigeonpea acreage (3.73 million ha) and production (3.07 million t), the productivity is lower at 707 kg/ha than the world average. The Morocco India Food Legumes Initiative in collaboration with the ICRISAT is aimed at improving the livelihood of small farmers to strengthen food and nutritional security through adoption of improved technologies. This paper is focused on developing and disseminating strategies to improve pigeonpea productivity in dryland regions which are characterized by erratic rainfall, frequent and prolonged dry spells and soil nutrient depletion. During 2013-16, demonstrations were conducted in 1200 farmers’ fields in Mahabubnagar district, Telangana, India, with an objective of enhancing the productivity of pigeonpea using three drought mitigating strategies: (i) adoption of short-duration cultivar PRG 176, a high-yielding and early-maturing pedigree selection of ICPL 88034 x ICPL 88039 with a duration of 130-135 days; (ii) foliar application of soluble fertilizer to maintain vegetative growth and ultimately improve pod filling; (iii) life saving irrigation at the rate of 20 mm with water harvested from farm ponds during mid season drought and prolonged dry spells. Adoption of PRG 176 resulted in an average yield of 1400 kg/ha compared to LRG 41 (1120 kg/ha). The yield improvement of 25% can largely be attributed to the good branching habit (8- 13 primary branches) and high flower to pod conversion ratio of PRG 176 under dryland conditions. Foliar application of multi-K during flowering and pod formation stages enhanced the yield to 1360 kg/ha compared to the yield of 1100 kg/ha obtained in fields without foliar spray. Life saving irrigation in PRG 176 during mid season dry spell which persisted for 17-21 days improved the yields by 20 % compared to the yield of 1200 kg/ha obtained in rainfed crop. In conclusion, the study demonstrated that the productivity of pigeonpea in dryland regions can be enhanced to an average 1560 kg/ha through an integrated drought mitigating approach by exploiting the short-duration and high-yielding potential of PRG 176, providing life saving irrigation during critical growth stages and foliar application of nutrients at flowering and pod formation stages

Design and Realization of Data Transmitter for Video Streaming of On-board Deployments in Geostationary Spacecrafts

Recent geostationary spacecrafts are configured with video streaming feature during deployment of critical onboard mechanisms such as Solar Array Drive Assembly and Unfolding of Parabolic Antennae. To accomplish this, frames captured by the on board camera are to be transmitted to ground station through adata transmitter. This data transmitter has to share a narrow bandwidth of 20 MHz in C-Band with mission critical telemetry transmitters of the host spacecraft and other co-located spacecrafts without causing any interference.Since reliability and simplicity are the most important criteria in the design of a mainframe system for a satellite, an architecture based on Binary Phase Shift Keying (BPSK) modulation is chosen. RF carrier is generated through a compact X12 frequency multiplier that gets stable reference input signal from a Temperature Compensated Crystal Oscillator (TCXO).  The design also involves RF alignment and packaging strategies to ensure the operation as per specifications through specified ranges of temperature and vibration levels.  The performance of the transmitter is found to meet all specifications post launch