High uncertainty aware localization and error optimization of mobile nodes for wireless sensor networks

The localization of mobile sensor nodes in a wireless sensor network (WSN) is a key research area for the speedy development of wireless communication and microelectronics. The localization of mobile sensor nodes massively depends upon the received signal strength (RSS). Recently, the least squared relative error (LSRE) measurements are optimized using traditional semidefinite programming (SDP) and the location of the mobile sensor nodes was determined using the previous localization methods like least squared relative error and semidefinite programming (LSRE-SDP), and approximate nonlinear least squares and semidefinite programming (ANLS-SDP). Therefore, in this work, a novel high uncertainty aware-localization error correction and optimization (HUA-LECO) model is employed to minimize the aforementioned problems regarding the localization of mobile sensor nodes and enhance the performance efficiency of root mean square error (RMSE) results. Here, the position of target mobile sensor nodes is evaluated based on the gathered measurements while discarding faulty data. Here, an iterative weight updation approach is utilized to perform localization based on Monte Carlo simulations. Simulation results show significant improvement in terms of RMSE results in comparison with traditional LSRE-SDP and ANLS-SDP methods under high uncertainty

Variation in morpho-physiological, biochemical and molecular responses of two Eucalyptus species under short-term water stress

The genus Eucalyptus occurs in a wide range of environmental conditions, including rainforests, subalpine, arid/semi-arid and moist temperate zones. It includes species with the capacity to cope with extremely low water potential. This study aims to screen water stress tolerance in two Eucalyptus species under nursery conditions. Inter-specific variation in morphological, physiological, biochemical and molecular parameters in two Eucalyptus species (E. tereticornis and E. camaldulensis) with contrasting levels of tolerance to progressive short term water-deprived condition was evaluated. Water stress reduced growth measured in terms of root:shoot ratio and specific leaf area (SLA), photosynthetic parameters, leaf water potential and relative water content (RWC) in both genotypes. Biochemical parameters including total sugars, phenol, phytohormones (indole acetic acid and abscisic acid) and proline were found to significantly increase during stress in both genotypes. Water responsive transcripts like osmotin and DREB/CBF registered significant expression variation in the two genotypes, suggesting their key role in regulating water stress tolerance in Eucalyptus

{(1R,2R)-N,N′-Bis[2-(N-methyl­anilino)benzyl­idene]cyclo­hexane-1,2-diamine-κ2 N,N′}dichloridoiron(II)

In the title compound, [FeCl2(C34H36N4)], the FeII ion is coordinated by two Cl atoms and by two N atoms from a (1R,2R)-N,N′-bis[2-(N-methyl­anilino)benzyl­idene]cyclo­hexane-1,2-diamine ligand in a distorted tetra­hedral geometry. The mol­ecule has approximate C 2 point symmetry. The dihedral angles between the phenyl and benzene rings on either side of the ligand are 64.56 (14) and 65.61 (13)°

Comparative catching efficiency of traditional prawn fishing gears in Pulicat lake of Tamil Nadu, India

303-310Prawn fishery in Pulicat Lake has a significant role in livelihood of the fishers, which is being harvested through different fishing gears. Here, we investigated the prawn-fishing gear and their catch composition. The information on various aspect about the gears was collected from the 48 respondents each month through pre-designed interview schedule by adopting random sampling. Results revealed that the quantity of prawn were higher in stake net (209.83 kg), followed by barriers (118.58 kg), drive-in-net (55.58 kg) tangle net (18.25 kg) and was statically significant at 5 %. It was estimated that more than half (52.16 %) of the total prawn catch in Pulicat Lake was obtained through stake net than the barriers (29.48 %), drive-in-net (13.82 %) and tangle net (4.54 %). The maximum quantity of prawn was obtained during the November and December in all the prawn-fishing gear (p < 0.05). This study concludes that non-selective fishing gears resulted in the abundant catch of juvenile fishes and crabs, need to be regulated mesh size, to support the conservation and sustainable harvest of the fishery resources in Pulicat Lake

Indigenous fishing gears of the Pulicat lagoon of Tamil Nadu

A study was conducted on the design and the operational details of fishing gears and craft operated form 54 fishing villages bordering the Pulicat lagoon, one of the important lagoons of India (lat. 13.5593° N, long. 80.2098° E). Information was collected from 320 respondents covering a minimum of 5–7 fishermen from each fishing village. The investigation revealed the existence of 26 types of traditional fishing gears belonging to 15 categories. The pattern of operation of fishing gears used by fishermen was as follows: stake nets (33%), drift gillnets (24%), set gill nets (19%), drive-in nets (14%), and other gears (&lt;10%). Among the 26 types of fishing gears analyzed, 7 gears, viz. hand-lift net, crab fishing gear, lighted crab scoop net, prawn fishing gear, wooden cover pot, cradle trap, and mono line with multiple hooks, were found to be eco-friendly. Further, the multi-stick drag net was found to be as a detrimental fishing gear as its operation lead to indiscriminate fishing with the high contribution of juveniles fishes of higher growth potential. The study revealed that the fishing pattern with traditional gears being practiced in the Pulicat lagoon might be continued without any further additional introduction of detrimental fishing gears such as gill net or mini trawl that are operated adjacent to this lagoon in the sea to sustain the fishery of this lagoon

Fabrication of a Selective Sensor Amplification Probe Modified with Multi-Component Zn2SnO4/SnO2 Heterostructured Microparticles as a Robust Electrocatalyst for Electrochemical Detection of Antibacterial Drug Secnidazole

In this study, we synthesized heterostructured zinc stannate/tin oxide microparticles (ZTO/TO MPs) by a simple coprecipitation method and used them as an effective electrode material for the electrochemical detection of the antibacterial drug secnidazole (SCZ). The as-prepared ZTO/TO MPs were characterized by XRD, Raman, FE-SEM, HR-TEM, EDX, and XPS analyses. The physiochemical studies clearly proved that the fabricated ZTO/TO MPs were formed in a heterostructure phase without other impurities. A glassy carbon electrode modified with the synthesized ZTO/TO MPs showed an excellent and improved electrocatalytic activity in the electrochemical reduction of SCZ. Using differential pulse voltammetry (DPV), an impressive linear calibration range, extending from 0.01 to 193 μM, was observed, coupled with a detection limit of 0.0054 μM and a sensitivity of 0.055 μA/μM. In addition, the ZTO/TO MPs/GCE showed very good selectivity for the detection of SCZ in the presence of a number of biological, inorganic, and structurally related compounds. Finally, the ZTO/TO MPs/GCE was investigated for the analysis of SCZ in human blood serum samples. A very good recovery was obtained when spiking the blood serum with SCZ, highlighting the good applicability of the ZTO/TO MPs/GCE for the electrochemical analysis of SCZ in complex biological samples