35 research outputs found
Image Processing Based Notice Board Reader Using Raspberry Pi
The main intention behind this paper is to reduce the “Manpower”; hence we are developing a open source audio notice software – A notice board reader with raspberry pi controls. The image processing is used in the proposed system as Image processing is the process of performing mathematical functions and operations of an image. So, this paper presents the implementation of image processing operations on Raspberry Pi. Raspberry Pi features a Broadcom system on a chip (SOC) which includes ARM compatible CPU. This platform is mainly based on python. Most of the access technology tools built for notice board they are built on the two basic building blocks of OCR software and Text-to-Speech (TTS) system. In this paper captured images are converted into the text through the use of OCR and the text files are processed by an open CV library and using E-speak command audio output is achieved
The Geroch group in the Ashtekar formulation
We study the Geroch group in the framework of the Ashtekar formulation. In
the case of the one-Killing-vector reduction, it turns out that the third
column of the Ashtekar connection is essentially the gradient of the Ernst
potential, which implies that the both quantities are based on the ``same''
complexification. In the two-Killing-vector reduction, we demonstrate Ehlers'
and Matzner-Misner's SL(2,R) symmetries, respectively, by constructing two sets
of canonical variables that realize either of the symmetries canonically, in
terms of the Ashtekar variables. The conserved charges associated with these
symmetries are explicitly obtained. We show that the gl(2,R) loop algebra
constructed previously in the loop representation is not the Lie algebra of the
Geroch group itself. We also point out that the recent argument on the
equivalence to a chiral model is based on a gauge-choice which cannot be
achieved generically.Comment: 40 pages, revte
Fundamentals of the LISA Stable Flight Formation
The joint NASA-ESA mission LISA relies crucially on the stability of the
three spacecraft constellation. Each of the spacecraft is in heliocentric
orbits forming a stable triangle. The principles of such a formation flight
have been formulated long ago and analysis performed, but seldom presented if
ever, even to LISA scientists. We nevertheless need these details in order to
carry out theoretical studies on the optical links, simulators etc. In this
article, we present in brief, a model of the LISA constellation, which we
believe will be useful for the LISA community.Comment: 9 Pages, 2 Figure Submitted to Classical and Quantum Gravit
DEVELOPING A NOVEL APPROACH FOR IMPROVING AVAILABILITY OF JOBTRACKER IN HADOOP
Cluster based distributed system containssingles JobTracker and multiple TaskTracker. TaskTracker performs MapReduce operation on DataNode. In this approach, JobTracker facing single point of failure problem. The solution includes theAvatarNode and ZooKeeper. Firstly, AvatarNode uses efficient checkpoint strategy to manage temporary namespace. AvatarNode gives temporary space to store the metadata about current job and flush that data after successful job execution. Secondly, ZooKeeper which is used for session monitoring by communicating with failover manager that is residing in JobTracker andAvatarNode This approach reduces Remote Procedure Call (RPC) traffic between Backup Node and DataNodeby direct communication of JobTracker and AvatarNode
Developing A Novel Approach for Improving Availability of Jobtracker in Hadoop
Cluster based distributed system containssingles JobTracker and multiple TaskTracker. TaskTracker performs MapReduce operation on DataNode. In this approach, JobTracker facing single point of failure problem. The solution includes theAvatarNode and ZooKeeper. Firstly, AvatarNode uses efficient checkpoint strategy to manage temporary namespace. AvatarNode gives temporary space to store the metadata about current job and flush that data after successful job execution. Secondly, ZooKeeper which is used for session monitoring by communicating with failover manager that is residing in JobTracker andAvatarNode This approach reduces Remote Procedure Call (RPC) traffic between Backup Node and DataNodeby direct communication of JobTracker and AvatarNode
Highly Enantioselective Pd-Catalyzed Synthesis of P‑Stereogenic Supramolecular Phosphines, Self-Assembly, and Implication
Metal-catalyzed
asymmetric addition of a secondary phosphine to
an aryl halide is one of the most efficient and reliable approaches
for the construction of enantiopure carbon–phosphorus bonds.
An isolated PdÂ(II) complex (<b>5</b>) catalyzes the carbon–phosphorus
coupling reaction between tolylphenylphosphine (<b>1a</b>) and
3-iodophenylurea (<b>2b</b>), which proceeds with an unprecedented
enantiomeric excess (ee) of 97%. The generality of the strategy has
been demonstrated by preparing a small library of a new class of P-stereogenic
phosphines with an in-built hydrogen bonding motif for the first time.
The P-stereogenic phosphines self-assemble on a metal template via
deliberately installed hydrogen-bonding motifs and mimic the bidentate
ligand coordination. Interestingly, when it was employed in asymmetric
hydrogenation, the supramolecular phosphine {1-(3-(phenylÂ(<i>o</i>-tolyl)Âphosphanyl)Âphenyl)Âurea} (<b>6b</b>) produced
the corresponding hydrogenated product with the highest enantiomeric
excess of 99% along with excellent conversion, demonstrating the potential
of these enantioenriched P-chirogenic supramolecular phosphines in
asymmetric catalysis
Highly Enantioselective Pd-Catalyzed Synthesis of P‑Stereogenic Supramolecular Phosphines, Self-Assembly, and Implication
Metal-catalyzed
asymmetric addition of a secondary phosphine to
an aryl halide is one of the most efficient and reliable approaches
for the construction of enantiopure carbon–phosphorus bonds.
An isolated PdÂ(II) complex (<b>5</b>) catalyzes the carbon–phosphorus
coupling reaction between tolylphenylphosphine (<b>1a</b>) and
3-iodophenylurea (<b>2b</b>), which proceeds with an unprecedented
enantiomeric excess (ee) of 97%. The generality of the strategy has
been demonstrated by preparing a small library of a new class of P-stereogenic
phosphines with an in-built hydrogen bonding motif for the first time.
The P-stereogenic phosphines self-assemble on a metal template via
deliberately installed hydrogen-bonding motifs and mimic the bidentate
ligand coordination. Interestingly, when it was employed in asymmetric
hydrogenation, the supramolecular phosphine {1-(3-(phenylÂ(<i>o</i>-tolyl)Âphosphanyl)Âphenyl)Âurea} (<b>6b</b>) produced
the corresponding hydrogenated product with the highest enantiomeric
excess of 99% along with excellent conversion, demonstrating the potential
of these enantioenriched P-chirogenic supramolecular phosphines in
asymmetric catalysis
Highly Enantioselective Pd-Catalyzed Synthesis of P‑Stereogenic Supramolecular Phosphines, Self-Assembly, and Implication
Metal-catalyzed
asymmetric addition of a secondary phosphine to
an aryl halide is one of the most efficient and reliable approaches
for the construction of enantiopure carbon–phosphorus bonds.
An isolated PdÂ(II) complex (<b>5</b>) catalyzes the carbon–phosphorus
coupling reaction between tolylphenylphosphine (<b>1a</b>) and
3-iodophenylurea (<b>2b</b>), which proceeds with an unprecedented
enantiomeric excess (ee) of 97%. The generality of the strategy has
been demonstrated by preparing a small library of a new class of P-stereogenic
phosphines with an in-built hydrogen bonding motif for the first time.
The P-stereogenic phosphines self-assemble on a metal template via
deliberately installed hydrogen-bonding motifs and mimic the bidentate
ligand coordination. Interestingly, when it was employed in asymmetric
hydrogenation, the supramolecular phosphine {1-(3-(phenylÂ(<i>o</i>-tolyl)Âphosphanyl)Âphenyl)Âurea} (<b>6b</b>) produced
the corresponding hydrogenated product with the highest enantiomeric
excess of 99% along with excellent conversion, demonstrating the potential
of these enantioenriched P-chirogenic supramolecular phosphines in
asymmetric catalysis
Synthesis of azo compounds containing thymol moiety
329-331The present work includes the synthesis of azo compounds containing thymol moiety