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Search Results: 1 - 10 of 1044 matches for " Sakshi Arora "
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New hybrid evolutionary algorithm for solving the bounded diameter minimum spanning tree problem
Sakshi Arora,Garg M.L.
Advances in Computational Research , 2009,
Abstract: Given a connected, weighted, undirected graph G and a bound D, the bounded diameterminimum spanning tree (BDMST) problem seeks a spanning tree on G of minimum weight among the treesin which no path between two vertices contains more than D edges. This problem is NP-hard for 4 D |v| -1. In present paper a new randomized greedy heuristic algorithm for solving BDMST is proposed. Anevolutionary algorithm encodes spanning trees as lists of their edges, augmented with their center vertices.It applies operators that maintain the diameter bound and always generate valid offspring trees. Theseoperators are efficient, so the algorithm scales well to larger problem instances. On 25 Euclidean instancesof up to 1000 vertices, the EA improved substantially on solutions found by the randomized greedyheuristic.
Fetal Hydantoin Syndrome and Its Anaesthetic Implications: A Case Report
Ranju Singh,Nishant Kumar,Sakshi Arora,Ritu Bhandari,Aruna Jain
Case Reports in Anesthesiology , 2012, DOI: 10.1155/2012/370412
Abstract: Fetal hydantoin syndrome is a rare disorder that is believed to be caused by exposure of a fetus to the anticonvulsant drug phenytoin. The classic features of fetal hydantoin syndrome include craniofacial anomalies, prenatal and postnatal growth deficiencies, underdeveloped nails of the fingers and toes, and mental retardation. Less frequently observed anomalies include cleft lip and palate, microcephaly, ocular defects, cardiovascular anomalies, hypospadias, umbilical and inguinal hernias, and significant developmental delays. Anaesthesia for incidental surgery in such a patient poses unique challenges for the anesthesiologist. We report the successful management of a 4-year-old male child with fetal hydantoin syndrome, cleft palate, spina bifida, atrial septal defect, and dextrocardia for tibialis anterior lengthening under subarachnoid block.
DVCCCTA-Based Implementation of Mutually Coupled Circuit
Neeta Pandey,Sakshi Arora,Rinku Takkar,Rajeshwari Pandey
ISRN Electronics , 2012, DOI: 10.5402/2012/303191
Abstract:
Fetal Hydantoin Syndrome and Its Anaesthetic Implications: A Case Report
Ranju Singh,Nishant Kumar,Sakshi Arora,Ritu Bhandari,Aruna Jain
Case Reports in Anesthesiology , 2012, DOI: 10.1155/2012/370412
Abstract: Fetal hydantoin syndrome is a rare disorder that is believed to be caused by exposure of a fetus to the anticonvulsant drug phenytoin. The classic features of fetal hydantoin syndrome include craniofacial anomalies, prenatal and postnatal growth deficiencies, underdeveloped nails of the fingers and toes, and mental retardation. Less frequently observed anomalies include cleft lip and palate, microcephaly, ocular defects, cardiovascular anomalies, hypospadias, umbilical and inguinal hernias, and significant developmental delays. Anaesthesia for incidental surgery in such a patient poses unique challenges for the anesthesiologist. We report the successful management of a 4-year-old male child with fetal hydantoin syndrome, cleft palate, spina bifida, atrial septal defect, and dextrocardia for tibialis anterior lengthening under subarachnoid block. 1. Introduction Patients with multiple congenital anomalies often have special needs requiring attention and present unique challenges to the health care provider responsible for administering sedation and anesthesia. It is important to recognize risk factors and potential complications before anesthetizing these patients. The association among maternal epilepsy, anticonvulsant drugs, and an increased incidence of congenital abnormalities has been suspected for at least 25 years. Although, most anticonvulsant medications have been implicated as potential teratogens, phenytoin, valproic acid, carbamazepine, or a combination therapy with these compounds is involved most commonly [1, 2]. We report the successful management of a 4-year-old male child with fetal hydantoin syndrome, spina bifida, and dextrocardia for bilateral tibialis anterior lengthening under subarachnoid block. 2. Case Report A four-year-old, 20?kg male child with congenital talipes equinovarus was posted for bilateral tibialis anterior lengthening surgery. The patient’s mother gave a history of being an epileptic and was taking tablet phenytoin 100?mg BD for the last 7 years and throughout the antenatal period. The mother was attending an antenatal clinic, where she was advised to continue with the drug therapy in view of persistent convulsions. She had had a previous caesarean section and the child was born healthy and devoid of any defects. This child was born at term through a caesarean delivery in view of nonprogress of labor. The child developed seizures on first day of life and had further episodes in February and June 2011, but was not advised any medication. The child had history of recurrent upper respiratory tract infections and delayed
DVCCCTA-Based Implementation of Mutually Coupled Circuit
Neeta Pandey,Sakshi Arora,Rinku Takkar,Rajeshwari Pandey
ISRN Electronics , 2012, DOI: 10.5402/2012/303191
Abstract: This paper presents implementation of mutually coupled circuit using differential voltage current-controlled conveyor transconductance amplifier (DVCCCTA). It employs only two DVCCCTAs, one grounded resistor, and two grounded capacitors. The primary, secondary, and mutual inductances of the circuit can be independently controlled and tuned electronically. The effect of non-ideal behaviour of DVCCCTA on the proposed circuit is analyzed. The functionality of the proposed circuit is verified through SPICE simulation using 0.25?μm TSMC CMOS technology parameters. 1. Introduction Since the beginning of current-mode circuit concept, a lot of research has been directed towards the development of active inductance and immittance simulator circuits. A limited literature is available on active realizations (simulators) of mutually coupled circuit (MCC). The MCC is characterized by primary inductance, secondary inductance, mutual inductance, and the coupling factor. The MCC simulators can be integrated easily and have reduced possibility of magnetic interference due to absence of inductive components. Also, there exists a possibility of tunability of inductance values along with the coupling coefficient. Considering this, some MCC simulators have recently been reported in literature that uses different active building blocks [1–8]. The study of MCC simulators [1–8] shows that the circuits reported in [1, 2, 7] are based on operational transconductance amplifier (OTA), [2–4] that uses second-generation current conveyors (CCII), [5, 6] employ second-generation current-controlled conveyors (CCCII), [7] uses differential voltage current conveyors (DVCC) and CCIIs, [8] and utilizes current-controlled current backward transconductance amplifier (CC-CBTA). Some of these implementations [1–7] realize grounded MCC whereas a floating MCC realization is reported in [8]. The OTA-based MCC [1, 2] employs eight OTAs and two grounded capacitors. The CCII-based structures [2–4] use four to eight active elements, four to six resistors, and two to four capacitors. The CCCII-based MCC [5] employs four CCCIIs, five resistors, and two capacitors [5]. Reference [6] reports another CCCII-based MCC that uses five CCCIIs, two capacitors, and an inductor. Two circuits are reported in [7], the first circuit uses four OTAs, two resistors, and two capacitors whereas the second circuit makes use of two DVCCs; two CCIIs, six resistors, and two capacitors. The recently reported MCC [8] uses three CC-CBTAs and three capacitors. The circuits reported in [1, 5–8] are electronically tunable MCC
Role of isospin degree of freedom on N/Z dependence of participant-spectator matter
Sakshi Gautam
Physics , 2011,
Abstract: We study the N/Z dependence of participant-spectator matter for Ca+Ca reactions at 50 and 250MeV/nucleon. We also study the role of symmetry energy and momentum-dependent interactions on the N/Z dependence of participant-spectator matter.
Study of nuclear dynamics of neutron-rich colliding pair at energy of vanishing flow
Sakshi Gautam
Physics , 2011,
Abstract: We study nuclear dynamics at the energy of vanishing flow of neutron-rich systems having N/Z ratio 1.0, 1.6 and 2.0 throughout the mass range at semi central colliding geometry. In particular we study the behavior of average and maximum density with N/Z dependence of the system.
Study of participant-spectator matter, thermalization and other related phenomena for neutron-rich colliding pair
Sakshi Gautam
Physics , 2011, DOI: 10.1140/epja/i2012-12003-0
Abstract: We study the participant-spectator matter, density and temperature reached in heavy-ion reactions of neutron-rich systems having N/Z varying from 1.0 to 2.0 at 50 and 250 MeV/nucleon. The N/Z dependence of these quantities is also investigated. Our results show a weak dependence on the N/Z ratio of the system on these quantities. We also shed light on the role of N/Z ratio on the thermalization achieved in a reaction. We find similar weak N/Z dependence on thermalization also.
On the density and temperature of neutron-rich systems at the energy of vanishing flow in heavy-ion collisions
Sakshi Gautam
Physics , 2011, DOI: 10.1103/PhysRevC.83.064604
Abstract: We study nuclear dynamics at the the energy of vanishing flow for neutron-rich systems. In particular, we shall study the collision rate, density and temperature reached in a heavy-ion reaction with neutron-rich systems. We shall also study the mass dependence of these quantities. Our results indicate nearly mass independent nature for the density reached whereas a significant mass dependence exists for the temperature of neutron-rich systems.
Impact parameter dependence of the isospin effects and mass dependence of balance energy
Sakshi Gautam
Physics , 2010, DOI: 10.1088/1742-6596/282/1/012022
Abstract: We study the effect of isospin degree of freedom on the balance energy (E$_{bal}$) as well as its mass dependence throughout the mass range for two different sets of isobaric systems with N/Z = 1 and 1.4 at different colliding geometries ranging from the central to peripheral ones. Our findings reveal the dominance of Coulomb repulsion in isospin effects on E$_{bal}$ as well as its mass dependence throughout the range of the colliding geometry. Our results also indicate that the effect of symmetry energy on the energy of vanishing flow is uniform throughout the mass range and throughout the colliding geometry.
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