"Computerized Multimedia Package in Teaching and Learning Process of Social Sciences at Secondary School Level- An Experimental Study "

In the present context of world peace, there is a great need of strengthening the Teaching of Social, Economical, Cultural, Religious and Technological Values in the society. Since Social Sciences a wonderful treasure house of information and values, teaching of Social Sciences should be made more interesting to the students to learn at all the levels. In this regard Instructional Media has stimulated Social Sciences teachers to seek innovative strategies in teaching learning process. These strategies are concerned with the systematic application of various media and skills to the requirements of educating the syllabus of Social Sciences.Based on instructional design, a Multimedia Package is prepared with the combination of text, graphics, sound, animation and video elements and presentation delivered by the computer. It is an individualized learning Package with Multimeda techniques which has built in self-evaluation process also. This was validated by different groups of experts at different levels and was also field tested. Finally the achievement test was administered to the learners.Thus the effectiveness of Multimedia package (SLM) on achievement was studied and analyzed statistically with the help of scores obtained

Development of algorithms for MAV security

This paper describes the various security schemes required for incorporating security to the data being transmitted over the wireless link between a Micro Air Vehicle (MAV) and Ground Control Station (GCS). The suggested security schemes are developed in software and is integrated with the open source communication protocol i.e., MAVLink. The ciphers used in the adapted method are, Advanced Encryption Standard in Counter mode (AES-CTR) algorithm is used for data encryption, SHA-256 for key Hashing and Diffie-Hellman(D-H) for key exchange. This provides both encryption and authentication to the MAV communication, So that it results in improved security and integrity of the system in the real time applications

Pre-tsunami chemistry of sediments along the inner continental shelf off Ennore, Chennai, southeast coast of India

274-278The inner continental shelf off Ennore hosts sediment carrying several minor metals of both natural and anthropogenic origin from the Korttalaiyar River through Ennore Creek. The sediments are mostly sandy silt and silty sand. The CaCO₃ and organic matter contents in the sediment are very low (~ 2.1% and ~ 0.9%, respectively). The correlation matrix exhibits poor correlation between these components and minor metals indicating an insignificant role of CaCO3 and organic matter in enriching minor metals. The minor metals exhibit strong mutual positive association (R > 0.6 at 95% confidence level). The geographical distribution of the elements shows higher concentration in northern part of the study area when compared with their concentrations in the southern part. In view of the recent M9-tsunami effect on the coastal sediment of this region, the present investigation provides immediate pre-tsunami minor metal distribution levels. This in turn will provide a reference for studying sediment re-distribution due to high energy tsunami tidal waves in the study region

Bedding structures in Indian tsunami deposits that provide clues to the dynamics of tsunami inundation

The 2004 Indian Ocean tsunami deposited an extensive sandsheet on the coastal plain of SE India. At particular sites, the sedimentary bedding in the sandsheet provides evidence of variable energy conditions and flow during inundation of the coast. Trenching of the deposits at sites where only unidirectional flow was observed allowed the investigation of changes in hydrodynamics recorded in bedding structures without the added complexity of return flows and reworking. A high-velocity initial surge is recorded as upper flow regime (UFR) plane bedding. Following the initial high flow a period of falling flow velocity and quiescence occurs where sediments settle out of suspension, often resulting in a reverse graded bed that transitions to a graded (fining-up) bed. As water levels begin to decline after maximum inundation sheet flow caused the formation of inversely graded (coarsening-up) beds or a return to UFR conditions. At one site the final stages of tsunami inundation is recorded as small channels that have an erosional base and are filled with graded sediments that exhibit complex patterns of sedimentation. Pits excavated in areas of unidirectional flow allow the development of a sedimentary model for tsunami sediment dynamics across flat topography under unidirectional flow conditions

Does C-MAC ® video laryngoscope improve the nasotracheal intubating conditions compared to Macintosh direct laryngoscope in paediatric patients posted for tonsillectomy surgeries?

Background and Aims: C-MAC ® video laryngoscope (VL) with Macintosh blade has been found to improve Cormack-Lehane (C-L) laryngoscopic view as well as intubating conditions for orotracheal intubation. However, studies done on the performance of C-MAC ® VL for nasotracheal intubation (NTI) are very few in number. Hence, we compared laryngoscopy and intubating conditions between Macintosh direct laryngoscope and C-MAC ® VL for NTI. Methods: Sixty American Society of Anesthesiologists Physical Status I, II patients, aged 8-18 years, posted for tonsillectomy surgeries under general anaesthesia with NTI were randomised, into two groups. Patients in group 1 were intubated using Macintosh direct laryngoscope and group 2 with C-MAC ® VL. C-L grading, time required for intubation, need for additional manoeuvres and haemodynamic changes during and after intubation were compared between the groups. Results: C-L grade 1 views were obtained in 26 and 29 patients in group 1 and group 2, respectively (86.7% vs. 96.7%). Remaining patients were having C-L grade 2 (13.3% vs. 3.3%). Duration of intubation was less than a minute in group 2 (93.3%). Need for additional manoeuvres (M1-M5) were more in group 1 (97% vs. 77%). M1 (external manipulation) was needed more in group 2 compared to group 1 (53.3% vs. 30%). Magill′s forceps alone (M4) and M4 with additional external manipulation (M5) were needed more in group 1 compared to group 2 (60% vs. 16%). Conclusion: The overall performance of C-MAC ® VL was better when compared to conventional direct Macintosh laryngoscope during NTI in terms of glottis visualisation, intubation time and need for additional manoeuvres

Efficacy of Apnoeic Oxygenation by Nasal Prongs in Preventing Desaturation during Airway Management in Infants Undergoing General Anaesthesia: A Randomised Controlled Study

Introduction: Neonates and infants are more prone to desaturation during the apnoeic period of laryngoscopy and intubation. Various options exist to reduce this risk beyond conventional preoxygenation. Aim: To assess whether continuous apnoeic oxygenation via nasal prongs during intubation can extend the safe apnoea period compared to standard management with preoxygenation alone. Materials and Methods: A randomised controlled, two-group parallel clinical study was conducted at the Department of Anaesthesiology, Vijayanagar Institute of Medical Sciences, Ballari, Karnataka, India, from July 2019 to November 2020. The study involved 63 infants aged one day to six months undergoing elective or emergency surgeries under general anaesthesia. Preoxygenation via a mask was followed by sevoflurane induction and vecuronium-induced muscle relaxation. Conventional laryngoscopy and intubation were performed in 32 infants in Group-C (Control group), while 31 infants in Group-O (Apnoeic Oxygenation group) also received oxygen (O2 ) via nasal prongs at 4 L/min in addition to preoxygenation. The primary outcome parameter was the time taken for desaturation by 1%. The time taken to desaturate by 2%, 3%, 4%, and 5%, as well as their incidences, lowest observed saturation, safe apnoea period, and Heart Rate (HR) trends, were also noted. Data were analysed using Statistical Package for Social Sciences (SPSS) version 20.0 and OpenEpi version 3.01. Results: Demographic and clinical parameters were comparable between the groups. The mean time for 1% desaturation was 18.33±4.3 seconds in Group-C, while all Group-O cases maintained 100% saturation during the study period. No significant difference was found in the safe apnoea period between the groups (p=0.503). The average lowest O2 saturation observed in Group-C was 98.81±1.28%, while it was 100% in Group-O. Only one infant in Group-C showed desaturation down to 95%. Both groups exhibited similar HR trends. Conclusion: Apnoeic oxygenation by nasal prongs in healthy infants helps prolong the time to desaturation and can be beneficial for those at risk of desaturation and hypoxia