It appeared that the incidence of dry socket can be reduced significantly by using 0.2% chlorhexidne gluconate mouth rinse perioperatively (twice daily, 1 day before and 7 days after surgical extraction.

A corollary to industrialization and urbanization is a significant increase in noise levels. In many industrial settings, the noise levels are such that they are potential health hazards. There are many studies which suggest that prolonged exposures to high noise levels have a negative impact on various aspects of human physiology. However, not much work has been conducted in studying the effects of various noise frequencies in the industrial environment. This paper has made an attempt to identify various noise frequency components to which the workers of six major industries in Mysore (Karnataka State, India) are being exposed, and their effects on the physical, physiological, and psychological systems of the working community with respect to their noisy industrial environment. The study results showed that the sampled industrial workers were repeatedly being exposed to noise of dominant low- and mid-octave band center frequencies. It is found that symptoms such as 'eye ball pressure,' 'awakening from sleep,' 'pains in neck,' 'frequent ear vibration,' 'chronic fatigue,' 'repeated headache,' 'backache,' and 'repeated ear pulsation' are observed to be highly associated with low- and mid-octave band center frequency noise exposure among the sampled workers. Furthermore, among the major psychological symptoms identified to be associated with octave band center frequencies, it is evident that 'irritability' is highly associated with low- and mid-octave band noise frequency characteristics.

This study shows statistically high incidence of Dentigerous cyst association with radiographically normal impacted lower third molar teeth. Hence the Oral and Maxillofacial surgeons should consider histopathologic evaluation and radiographic diagnosis in the management of impacted lower third molars. Prophylactic extractions of normal impacted lower third molars should be considered as a treatment option.

Abstract-With requirements of spiralling data rates and limited spectrum availability, there is an increased interest in mmwave beamformer-based communications for 5G. For upcoming cellular networks, the critical point is to exploit the increased number of employable antennas at both Tx and Rx to (i) combat increased path loss, (ii) tackle higher interference due to higher user density and (iii) handle multipath effects in frequency selective channels. Towards this, a multi-beam spatiotemporal superresolution beamforming framework is proposed in this paper as a promising candidate to design beampatterns that mitigate/suppress co-channel interference and deliver massive gain in the desired directions. Initially, channel and signal models suitable for the mm-wave MIMO system are presented using the manifold vectors of both Tx and Rx antenna arrays. Based on these models, a novel subspace-based channel estimator is employed which estimates delays, directions, velocities and fading coefficients of the desired signal paths. This information is then exploited by the proposed spatiotemporal beamformer to provide massive array gain that combats path loss without increasing the number of antenna array elements and to be tolerant to the nearfar problem in a high interference environment. The performance of the proposed channel estimator and beamformer is examined using computer simulation studies.Index Terms-MIMO, frequency selective channel, mm-wave, spatiotemporal beamformer, channel estimation.

Abstract-Unmanned aerial vehicle (UAV) cluster applications, for tasks such as target localisation and tracking, are required to collect and utilise the data received on "flexible" sensor arrays, where the sensors, i.e. UAVs in this scenario, have time-variant positions. In this paper, using a parametric channel model, a UAV cluster mobility model and a kinematic model of the targets, an extended Kalman based state space model is proposed that tracks the unknown UAV positions and target parameters snapshot by snapshot. Simulation studies illustrating the tracking capabilities of the proposed technique have been presented.