Wireless Sensor Network (WSN) is an emerging field. Theses are normally designed to perform a set of high level information processing tasks, for example detection, tracking or classification. Different application areas WSN s Environmental Monitoring, Industrial Sensing and Diagnostics, Infrastructure Protection, Battle Field Awareness, Context Aware Computing etc. From WSN, it has been observed that ensuring security privacy one the highest priorities Systems. Information in network must...

A visible-light-triggered, Eosin-Y-catalyzed oxidative isomerization/carbon-oxygen bond formation of 3-(benzylidine) indolines has been explored to afford structurally diverse indole-3-carbinols and 3-acyl indoles in good-to-excellent yields. This new protocol is metal-free features mild reaction conditions, easily available starting materials, environmentally benign conditions. preliminary mechanistic study reveals that initially, an iminium ion-radical intermediate formed via a single...

In this paper, we present a novel energy efficient routing protocol for wireless sensor networks in which the nodes as well base station are mobile. The is hierarchical and cluster based from network structure perspective. Each contains one head node two deputy nodes. re-clustering time has been minimized by introducing concept of panel. Some simulation results shown depict efficiency prolonged life under influence proposed protocol. Future scope work outlined.

The construction of carbon-carbon bond through the metathesis reactions between carbonyls and olefins or alkynes has attracted significant interest in organic chemistry due to its high atomeconomy efficiency. In this regard, carbonyl–alkyne is well developed widely used synthesis for atom-efficient various carbocycles heterocycles presence catalytic Lewis acids Brønsted acids. On other hand, alkene-carbonyl recently been a topic great importance field because they possess attractive...

A modified Povarov reaction involving 2′-alkynylbiaryl-2-carbaldehydes and aryl amines with tandem oxidation was performed using catalytic FeCl3. The outcome an efficient general synthesis of dibenzo[a,c]acridines moderate to high yields. This method offers simplicity in the preparation substrates, diverse substrate scope, atom economy. generality protocol verified by synthesizing a tribenzo[a,c,h]acridine derivative. Photophysical properties synthesized compounds were also studied. absorb...

In the present study, we herein report a DDQ-catalyzed new protocol for synthesis of substituted 3-acylindoles. Being potential system virtual hydrogen storage, introduction catalytic DDQ in combination with Fe(NO3)3·9H2O and molecular oxygen as co-catalysts offers regioselective oxo-functionalization C-3 alkyl-/aryllidine indolines even scale-up investigations. Intermediate isolation, their spectroscopic characterization, density functional theory calculations indicate that method involves...

In this report, a tert-butyl nitrite (TBN)-mediated straightforward metal-free approach has been presented for the synthesis of diverse range C-3-substituted indazole–indole hybrids using readily accessible 2-(indolin-3-ylidenemethyl)aniline derivatives. This strategy is proposed to occur via diazonium salt intermediate that capable cascade isomerization and intramolecular C–N bond formation through 5-endo-dig cyclization achieve wide variety in good yields.

An iron(<sc>iii</sc>) catalyzed carboarylation of alkynes is reported for the synthesis highly substituted 1,2-dihydroquinolines, quinolines, 2<italic>H</italic>-chromenes, and 2<italic>H</italic>-thiochromenes under mild reaction conditions.

A series of diverse and complex hybrid structures indole bearing fluorene were obtained in the presence DDQ FeCl₃ with high regioselectivity under mild conditions from biaryl tethered 3-(methylene)indoline good to excellent yields.

Self organization is an important phase of a wireless sensor network. After deployment, sensors nodes are required to self organize themselves form network their own. Security aspect while forming the Only authorized should be allowed join For implementing security such as confidentiality, integrity and authentication keys needed. How handled described in key management approach. Key encompasses generation, storage, distribution, re-key retirement key. It observed that majority attacks...

A wireless sensor network consists of several nodes strewn over a large geographic area and base station. Depending upon the routing model used data collected by node are routed through hops to Before new becomes operational station verifies its authenticity for security reasons. We call this phase as secure joining node. The process can be simple allowing join simply verifying MAC-ID in plain text. However, is prone many attacks therefore, not acceptable organizations requiring high grade...

With the increase in complexity of fabrication techniques, yield chip production decreases at deep sub-micron technologies. In future fault tolerant techniques will be important to VLSI chips advanced regular structure like FPGA, redundancy is commonly used for tolerance. Most found so far literature talk about software based changes configuration data. this work we present a solution which bit stream FPGA modified by hardware controller that on itself. The technique uses redundant columns...

A novel DDQ/H 2 O-mediated synthetic method is developed for tert -indole-3-carbinols, and their application in the synthesis of unsymmetrical bis(3-indolyl)methanes with all-carbon quaternary centres described.

Correlation of signals at multiple scales observation is useful for multiresolution interpretation image, data and target signature analysis. Multiresolution analysis inherent in the discrete wavelet transform (DWT), but shift-variance coefficients dyadic orthogonal biorthogonal basis spaces problem associated with it. Shift-variance absence direct domain relationship make correlation inconvenient by DWT. In this paper, circulant shift property DWT used a novel way to produce critically...

Recent advances in large-scale pretraining have yielded visual foundation models with strong capabilities. Not only can recent generalize to arbitrary images for their training task, intermediate representations are useful other tasks such as detection and segmentation. Given that classify, delineate, localize objects 2D, we ask whether they also represent 3D structure? In this work, analyze the awareness of models. We posit implies (1) encode structure scene (2) consistently surface across...

Abstract An FeCl3-catalyzed Povarov reaction for the efficient synthesis of dibenzo[b,f][1,7]naphthyridines utilizing 1-(2-alkynylaryl)-2-pyrrolecarbaldehydes and arylamines in excellent yields is demonstrated. The essential features present strategy are easy preparation substrates, broad substrate scope, mild conditions, high atom economy yields, presence environmentally friendly iron catalysis.

Iron( iii )-catalyzed synthesis of indole–xanthydrol hybrid through oxidative cycloisomerization/hydroxylation reaction.

A direct method of measuring optical density by a linear relation to an indicating voltage has been developed combining the law absorptivity light in medium with photovoltaic relationship barrier layer cell. Temperature compensation obtained using two similar cells differentially, but single beam light, resulting considerable simplicity system. The upper limit measurable D is about 7 while lower range may be extended values less than 0.01. meter adjusted for full-scale reading D=2 found read...

The natural law of open circuit voltage response a silicon junction photovoltaic cell has been combined here with that obtained across the similar but nonilluminated due to an injected current, based on which temperature independent, precision logarithmic light meter is developed. range corresponds almost photosensitive in present case 10(-1)-10(+4) ix. over-all theoretical checked experimentally at several points, and accuracy found be well within 1% over ambient change about +/-3 degrees...