23 research outputs found
Horizontal trajectory based mobile multi-sink routing in underwater sensor networks
Scientific, commercial, exploration, and monitoring applications of underwater sensor networks have drawn the attention of researchers toward the investigation of routing protocols that are robust, scalable, and energy efficient. This has brought significant research in network layer routing protocols. Irrespective of the field of application it is desirable to increase network lifetime by reducing energy consumed by sensor nodes in the network or by balancing energy in the entire network. Energy balancing refers to the uniform distribution of the network’s residual energy such that all nodes remain alive for a long time. It requires uniform energy consumption by each sensor node in the network instead of the same node being involved in every transmission. In this paper, we discuss two routing methods for three-dimensional environments in which the water region under monitor is divided into subregions of equal height and each subregion has a sink. Nodes in the subregion send data to the sink designated for that subregion. The first method called static multi-sink routing uses static sinks and the second method called horizontal trajectory-based mobile multi-sink routing (HT-MMR) uses mobile sinks with a horizontal trajectory. Simulation results show that the proposed HT-MMR reduces average energy consumption and average energy tax by 16.69% and 16.44% respectively. HT-MMR is energy efficient as it enhances network lifetime by 11.11%
Fuzzy Clustering with Multi-Constraint QoS Service Routing in Wireless Sensor Networks, Journal of Telecommunications and Information Technology, 2019, nr 1
This paper presents a fuzzy logic-based, service differentiated, QoS aware routing protocol (FMSR) offering multipath routing for WSNs, with the purpose of providing a service differentiated path meant for communication between nodes, based on actual requirements. The proposed protocol initially forms a cluster by fuzzy c-means. Next, the building of a routing follows, so as to establish multiple paths between nodes through the modified QoS k-nearest neighborhood, based on different QoS constraints and on optimum shortest paths. If one node in the path fails due to lack of residual energy, bandwidth, packet loss, delay, an alternate path leading through another neighborhood node is selected for communication. Simulation results show that the proposed protocol performs better in terms of packet delivery ratio, delay, packet drop ratio and throughput compared to other existing routing protocols
Neu-Laxova Syndrome: An Unusual Association with Kyphosis
The Neu-Laxova syndrome is a rare autosomal recessive condition associated with neuro-ectodermal abnormalities and other patterns of severe malformations leading to prenatal or early postnatal lethality. Association with kyphosis is an extremely rare finding. A fetus born from a 25-year-old gravida at 30 weeks gestation was diagnosed with Dandy Walker syndrome with severe intrauterine growth restriction on ultrasonography. On post-mortem examination after termination of pregnancy, the fetus showed facial dysmorphology with microcephaly, smooth shiny skin and kyphosis. Skin histology showed hyperkeratosis, edema and increased subcutaneous fat suggestive of ichthyosis. On the basis of gross and microscopic features seen, a diagnosis of Neu-Laxova syndrome was made
Synthesis, spectral characterization and DNA cleavage studies of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) complexes with benzofuran-2-carbohydrazide schiff bases
664-669New schiff bases have been synthesized from
benzofuran-2-carbohydrazide and 1-naphthaldehyde [NMBC] or
6-methoxy-2-naphthaldehyde [MNMBC]. Complexes of the type MLX2,
where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II), L = NMBC or MNMBC
and X = Cl, have been synthesized and characterized on the basis of analytical
data, IR, UV-vis, 1H NMR, DART-MS and ESR spectral data and magnetic
studies. All the complexes are soluble in DMF and DMSO. The measured molar
conductance values indicate that the complexes are non-electrolytic in nature.
The DNA cleavage activities of the schiff bases and their Co(II), Ni(II) and
Cu(II) complexes have been studied by agarose gel electrophoresis method. The
Cu(II), Ni(II) and Co(II) complexes have also been studied for their plasmid
(pBR322) DNA cleavage activity
Fuzzy Clustering with Multi-Constraint QoS Service Routing in Wireless Sensor Networks
This paper presents a fuzzy logic-based, service differentiated, QoS aware routing protocol (FMSR) offering multipath routing for WSNs, with the purpose of providing a service differentiated path meant for communication between nodes, based on actual requirements. The proposed protocol initially forms a cluster by fuzzy c-means. Next, the building of a routing follows, so as to establish multiple paths between nodes through the modified QoS k-nearest neighborhood, based on different QoS constraints and on optimum shortest paths. If one node in the path fails due to lack of residual energy, bandwidth, packet loss, delay, an alternate path leading through another neighborhood node is selected for communication. Simulation results show that the proposed protocol performs better in terms of packet delivery ratio, delay, packet drop ratio and throughput compared to other existing routing protocols
A Rare Cutaneous Adnexal Tumour with a Rare Presentation
Proliferating Trichilemmal Tumour (PTT) is a rapidly
growing large cutaneous adnexal neoplasm. Although
biologically considered as benign, it may be locally
aggressive. Malignant transformation of these lesions,
known as Malignant Proliferating Trichilemmal
Tumour (MPTT) has rarely been reported. So far in the
literature, only 39 well-documented cases of MPTT
have been reported. MPTT has been stated to be a
neoplasm of the older age group according to review of
the literature. We present a case of MPTT in a young
male. A 25 year old male presented with a scalp
swelling of 2 years duration with a recent rapid
enlargement. The swelling was excised and
histopathological examination of the excised
specimen revealed features of MPTT. The differential
diagnosis of MPTTis squamous cell carcinoma as both
share common features. Accurate diagnosis of MPTT
is essential since it has a tendency to metastasize and
recur more frequently than squamous cell carcinoma