156 research outputs found
Trust in Vehicle-to-Vehicle Communication
In traditional Pedestrian Automatic Emergency Braking (PAEB) system, vehicles equipped with onboard sensors such as radar, camera, and infrared detect pedestrians, alert the driver and/ or automatically take actions to prevent vehicle-pedestrian collision. In some situations, a vehicle may not be able to detect a pedestrian due to blind spots. Such a vehicle could benefit from the sensor data from neighboring vehicles in making such safety critical decisions. We propose a trust model for ensuring shared data are valid and trustworthy for use in making safety critical decisions. Simulation results of the proposed trust model show promise
Aneurysmal bone cyst in proximal phalanx treated without bone grafting
Aneurysmal bone cyst involving the hand are a rare occurrence especially in the proximal phalanx. We report a case of 5 years old female child with proximal phalanx aneurysmal bone cyst treated without bone grafting. Magnetic resonance imaging may show fluid filled spaces but definite diagnosis can only be obtained histologically. It is a benign lesion still it can involve growth plate hence intervention is necessary. The treatment includes curettage with or without bone grafting
Aneurysmal bone cyst of medial end of clavicle: a rare case report
Aneurysmal bone cyst is a benign, but locally aggressive benign tumor. The clavicle being a rare site of tumors and very few cases of aneurysmal bone cyst of clavicle have been reported in literature. Due to its rarity of location of its presentation we hereby report a rare case of aneurysmal bone cyst of medial end of clavicle in a 20-year-old female which was treated by wide local resection and reconstruction
Twisted eleven-dimensional supergravity
We construct a fully interacting holomorphic/topological theory in eleven
dimensions that is defined on products of Calabi-Yau fivefolds with real
one-manifolds. The theory describes a particular deformation of the cotangent
bundle to the moduli space of Calabi-Yau structures on the fivefold. Its field
content matches the holomorphic (or minimal) twist of the eleven-dimensional
supergravity multiplet recently computed by the second two authors, and we
offer numerous consistency checks showing that the interactions correctly
describe interacting twisted eleven-dimensional supergravity at the
perturbative level. We prove that the global symmetry algebra of our model on
flat space is an central extension of the infinite-dimensional
simple exceptional super Lie algebra , following a recent suggestion
of Cederwall in the context of the relevant pure spinor model. Twists of
superconformal algebras map to the fields of our model on the complement of a
stack of M2 or M5 branes, laying the groundwork for a fully holomorphic version
of twisted holography in this context.Comment: 58 pages. Comments welcome
Intra-operative peri-articular cocktail injection in inflammatory arthritis patients undergoing total knee arthroplasty
Pain following TKA is often severe in most patients. The purpose of this case series was to assess the efficiency of intra-operative peri-articular cocktail injection in management of pain following total knee arthroplasty. This case series involves 16 patients with inflammatory arthritis of knee undergoing total knee arthroplasty (TKA). All patients had received peri-articular cocktail of drugs before the implantation of prosthesis with cement. In our study, there was significant improvement of Knee Clinical Score and Knee Functional Score following TKA. The mean KSS score was 37.5 (range: 31-44) improved to 92.5 (range, 86-99) and the functional score improved from 25.5 (range, 18-33) to 76 (range, 72- 80) at 6 months and 93 (range: 90-96) at 12 months. Intraoperative peri-articular injection with 20 ml of 0.5% ropivacaine, 1 ml of ketorolac, 1ml of clonidine and 0.5ml noradrenaline diluted in 20 ml of saline is effective in reducing immediate post-operative pain and thereby improving the overall functional outcome
Current Trends in Digital Twin Development, Maintenance, and Operation:An Interview Study
Digital twins (DT) are often defined as a pairing of a physical entity and a corresponding virtual entity mimicking certain aspects of the former depending on the use-case. In recent years, this concept has facilitated numerous use-cases ranging from design to validation and predictive maintenance of large and small high-tech systems. Although growing in popularity in both industry and academia, digital twins and the methodologies for developing and maintaining them differ vastly. To better understand these differences and similarities, we performed a semi-structured interview research study with 19 professionals from industry and academia who are closely associated with different lifecycle stages of the corresponding digital twins. In this paper, we present our analysis and findings from this study, which is based on eight research questions (RQ). We present our findings per research question. In general, we identified an overall lack of uniformity in terms of the understanding of digital twins and used tools, techniques, and methodologies for their development and maintenance. Furthermore, considering that digital twins are software intensive systems, we recognize a significant growth potential for adopting more software engineering practices, processes, and expertise in various stages of a digital twin's lifecycle
Projective Ring Line of a Specific Qudit
A very particular connection between the commutation relations of the
elements of the generalized Pauli group of a -dimensional qudit, being a
product of distinct primes, and the structure of the projective line over the
(modular) ring \bZ_{d} is established, where the integer exponents of the
generating shift () and clock () operators are associated with submodules
of \bZ^{2}_{d}. Under this correspondence, the set of operators commuting
with a given one -- a perp-set -- represents a \bZ_{d}-submodule of
\bZ^{2}_{d}. A crucial novel feature here is that the operators are also
represented by {\it non}-admissible pairs of \bZ^{2}_{d}. This additional
degree of freedom makes it possible to view any perp-set as a {\it
set-theoretic} union of the corresponding points of the associated projective
line
Current Trends in Digital Twin Development, Maintenance, and Operation: An Interview Study
Digital twins (DT) are often defined as a pairing of a physical entity and a
corresponding virtual entity mimicking certain aspects of the former depending
on the use-case. In recent years, this concept has facilitated numerous
use-cases ranging from design to validation and predictive maintenance of large
and small high-tech systems. Although growing in popularity in both industry
and academia, digital twins and the methodologies for developing and
maintaining them differ vastly. To better understand these differences and
similarities, we performed a semi-structured interview research study with 19
professionals from industry and academia who are closely associated with
different lifecycle stages of the corresponding digital twins. In this paper,
we present our analysis and findings from this study, which is based on eight
research questions (RQ). We present our findings per research question. In
general, we identified an overall lack of uniformity in terms of the
understanding of digital twins and used tools, techniques, and methodologies
for their development and maintenance. Furthermore, considering that digital
twins are software intensive systems, we recognize a significant growth
potential for adopting more software engineering practices, processes, and
expertise in various stages of a digital twin's lifecycle
Projective Ring Line Encompassing Two-Qubits
The projective line over the (non-commutative) ring of two-by-two matrices
with coefficients in GF(2) is found to fully accommodate the algebra of 15
operators - generalized Pauli matrices - characterizing two-qubit systems. The
relevant sub-configuration consists of 15 points each of which is either
simultaneously distant or simultaneously neighbor to (any) two given distant
points of the line. The operators can be identified with the points in such a
one-to-one manner that their commutation relations are exactly reproduced by
the underlying geometry of the points, with the ring geometrical notions of
neighbor/distant answering, respectively, to the operational ones of
commuting/non-commuting. This remarkable configuration can be viewed in two
principally different ways accounting, respectively, for the basic 9+6 and 10+5
factorizations of the algebra of the observables. First, as a disjoint union of
the projective line over GF(2) x GF(2) (the "Mermin" part) and two lines over
GF(4) passing through the two selected points, the latter omitted. Second, as
the generalized quadrangle of order two, with its ovoids and/or spreads
standing for (maximum) sets of five mutually non-commuting operators and/or
groups of five maximally commuting subsets of three operators each. These
findings open up rather unexpected vistas for an algebraic geometrical
modelling of finite-dimensional quantum systems and give their numerous
applications a wholly new perspective.Comment: 8 pages, three tables; Version 2 - a few typos and one discrepancy
corrected; Version 3: substantial extension of the paper - two-qubits are
generalized quadrangles of order two; Version 4: self-dual picture completed;
Version 5: intriguing triality found -- three kinds of geometric hyperplanes
within GQ and three distinguished subsets of Pauli operator
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