K. Rama Reddy's research while affiliated with Osmania University and other places

... The cracks in the floor as a consequence of poor quality of materials used for construction favours the enhancement of radon concentration (35) . Sreenath Reddy et al. (36) and Vinaya Kumar et al. (37) have observed that the dwellings with mud floors have relatively higher dose and reports that the sub surface soil may be predominating source of indoor radon, thoron for the environment of ...

... The probability distribution plots of radon and thoron activity over the year in different dwellings are shown in Figures 3 and 4. In general radon/thoron distribution follows lognormal (16) . Spatial variation of indoor radon in a given area is due to its dependency on geology/lifestyle of the dwellers, and studies carried out in large area with varied human habits follow lognormal distribution. ...

... In the past years, several radiation surveys were carried out in many countries to measure outdoor terrestrial g radiation doses (Brígido, Caballero, Montalv an Estrada, Queipo García, S anchez, 1999;Gabdo, Ramli, Sanusi, Saleh, & Garba, 2014;Kapdan, Taskin, Kam, & Osmanlio glu, 2012;Morishima et al., 2000;Mustapha et al., 2013;Nizam, Ginnah, Rahman, Kamal, & Chowdhury, 2013;Otansev, Karahan, Kam, Barut, & Taskin, 2012;Pashazadeh, Aghajani, Nabipour, & Assadi, 2014;Saleh et al., 2013;Shahbazi-Gahrouei, 2003). Many rivers in India and other countries have been studied such as river Pannoiyar (Ramasamy, Suresh, Meenakshisundaram, & Gajendran, 2009), Palar (Ramasamy, Murugesan, & Mullainathan, 2006),Cauvery (Murugesan, Mullainathan, Ramasamy, & Meenakshisundaram, 2011;Ramasamy, Murugesan, & Mullainathan, 2004), Kali, Sharavathi, Netravathi (Narayana, Rajashekara, & Siddappa, 2007) and Godavari (Reddy, Reddy, Reddy, & Reddy, 2014) in India and Chao Phraya river in Thailand (Santawamaitre et al., 2011), Ribble Estuary in England (Punt, Tyler, Saleh, Bradley, & Copplestone, 2011) Ogun river in Nigeria (Jibiri & Okeyode, 2012) and river Pearl in China (Song, Chen, Tang, Zhang, & Xie, 2012). In Indian situation, the activities like bathing, boating, rafting, fishing, farming and various religious rituals are usually performed at the bank or near the river. ...

... ( ) Different peaks, named T , A T , ME and T , F were identified in the curves and presented in table 3. The first peak at T A near 300 K could be attributed to the transition from anharmonic long range cycloidal ordering at low temperatures to a more harmonic structure which can be connected to spin-reorientation transitions as shown by Mossbauer spectroscopy for BiFeO 3 [14]. The precise parameters of the anharmonic cycloid structure below T A for BiFeO 3 [14] were obtained using a derivative model from its theoretical description previously used to reproduce nuclear magnetic resonance spectra of BiFeO 3 [15,16] were identified by Mossbauer spectroscopy [17]. We can also note the presence of an extremely large and flattened hump between 300 K and 450 K. ...

... First, the peak around 170 cm − 1 is only found in co-doped samples. This can be explained by the fact that Raman modes below 200 cm − 1 are related to doping at site A [38], namely in samples where Ca 2+ is doping the Gd 3+ site. On the other hand, the peaks around 200 and 595 cm − 1 are in the three doped samples. ...

... The lattice parameters as obtained in this case are a = 5.8974 & c = 52.7677; a = 5.8682 & c = 52.3384 for BCFO and SCFO, respectively, which is close to the values reported earlier [16,17]. The fraction of Z-hexaferrite is nearly 60% for BCFO and SCFO. ...

... The quantity of light released by the TL phosphor is linear with absorbed radiation dose. The detailed characteristics of TLDs, process of preparation and its calibration is well documented [7,11,12]. In the present study, CaSO 4 :Dy powder supplied by Renintech Laboratories Pvt. ...

... In RFeO 3 , the bonding between Fe-Fe, R-R, and Fe-R makes them applicant for various purposes like spintronic, application storage and sensor technology [5]. Among each bonding there exists isotropic, antisymmetric and the anisotropic-symmetric super exchange interactions [6]. The super exchange interactions may originate ferro-electricity driven by rare earth ions in R-side [7]. ...

... In Fig. 1a, the difference between the observed and calculated pattern is shown for each sample. It is reported that often a secondary phase of spinel ferrite accompanies the Y-type hexaferrite due to its high kinetics of formation [30]. The lattice parameters a and c were also determined using the Rietveld refinement method (Fig. 1b). ...

... In recent decades, Manganese-based perovskite materials with CMR effect are another strong correlated material after high-temperature superconductors [1][2][3][4][5]. The general formula is RE x AE 1-x MnO 3 (RE is the rare-earth element, La 3? , Nd 3? , etc.; AE is the alkali earth element, Ca 2? , Sr 2? , etc.) while being of extensive attention due to special physical properties, for instance, the colossal magnetoresistance effect (CMR), charge/orbital ordering, phase separation and so on [6][7][8]. Such properties had potential technical applications in magnetic refrigeration, magnetic sensors, and infrared detectors [9,10]. ...