970 research outputs found
Correction: Saxena, U.R.; Kadel, R. RACHEIM: Reinforced Reliable Computing in Cloud by Ensuring Restricted Access Control. Network 2025, 5, 19
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Indocyanine green fluorescent cholangiography: The new standard practice to perform laparoscopic cholecystectomy in pediatric patients. A comparative study with conventional laparoscopic technique
No full textBackground: This study aimed to compare outcomes of standard laparoscopic cholecystectomy and indocyanine green fluorescent cholangiography laparoscopic cholecystectomy over a 10-year period. Methods: From 2013 to 2023, 173 laparoscopic cholecystectomies were performed in 2 pediatric surgery units: 83 using standard technique (G1) and 90 using indocyanine green fluorescent cholangiography (G2). Patients included 96 girls and 77 boys, with a median age of 12.3 years (range 4-17) and a median weight of 51 kg (range 19-114). The 2 groups were compared regarding the following: (1) perioperative complications rate; (2) overall length of surgery (T1); (3) length of cystic duct isolation, clipping, and sectioning (T2); (4) time of gallbladder removal (T3); (5) degree of visualization of biliary tree; (6) safety and feasibility of indocyanine green fluorescent cholangiography; (7) incidence of anatomical anomalies detected intraoperatively. Results: All laparoscopic cholecystectomies were accomplished without conversion to open. The perioperative complications rate was significantly higher in G1 compared with G2 (12% vs 0%; P = .0007). Median T1, T2, and T3 were significantly longer in G1 (90, 37, 35 minutes) compared with G2 (55, 17, 19 minutes) (P = .0001), respectively. The visualization rate of the complete biliary tree was significantly higher in G2 (98.8%) than in G1 (80.7%) (P = .0001). No adverse reactions to indocyanine green were recorded. The incidence of biliary anomalies detected intraoperatively was significantly higher in G2 (7.8%) than in G1 (1.2%) (P = .03). Conclusion: Indocyanine green fluorescent cholangiography can be considered the new standard practice to perform laparoscopic cholecystectomy in pediatrics. Indocyanine green fluorescence provided superior visualization of biliary anatomy, increased detection of anatomic variants, faster procedure, and fewer complications compared with conventional technique. Indocyanine green fluorescent cholangiography was safe, feasible, simple, inexpensive, and a timesaving tool
Arbitration and Dispute Settlement in Foreign Indirect Investment. The increasing significance and use of arbitration in international loan agreements, syndicated loans and international bond issues
No full textThis dissertation examines the suitability of arbitration for the resolution of securities regulatory claims and it adoption globally, which has resulted in international arbitration becoming the favoured dispute resolution mechanism in the securities industry. The author explains that disputes arising out of international bilateral and syndicated loan agreements are generally considered to be arbitrable, while international bond disputes are often derived from the controversies over the application of mandatory national laws and the compliance with securities regulation provisions - so the arbitrability of international bond disputes depends on the acceptance of the arbitrability of securities regulatory claims
A monolithically integrated power JFET and Junction Barrier Schottky diode in 4H silicon carbide
No full textEfficiency of power management circuits depends significantly on their constituent switches and rectifiers. The demands of technology are increasingly running up against the intrinsic properties of Si based power devices. 4H-Silicon Carbide (SiC) has superior properties that make it attractive for high power applications. SiC rectifiers are already a competitive choice and SiC switches have also been commercialized recently. Junction Barrier Schottky (JBS) diodes, which combine the advantages of PN and Schottky, have higher Figure of Merit (FOM) as rectifiers. Among switches, a robust and mature process has been developed for Silicon Carbide Vertical Junction Field Effect Transistors (VJFETs), which currently gives it the highest unipolar FOM. Switches are frequently combined with anti-parallel diodes in power circuits. This thesis describes the development of a SiC-based monolithically integrated power switch and diode. Monolithic integration increases reliability and efficiency, and reduces cost. Because of their superior properties and similarities in fabrication, we chose the SiC VJFET and JBS diode as the switch and rectifier. Detailed design, fabrication and characterization of the integrated switch to block above 800 V and conduct current beyond 100 A/cm2 is explained. In this process, the first physics-based 2-D compact model is developed for reverse leakage in a JBS diode as a function of design parameters. Since the gate-channel junctions of SiC VJFETs cannot be assumed to be abrupt, an existing analytical model for Si VJFETs is extended to account for graded gate-channel junctions. Using these analytical models, design rules are developed for the VJFET and JBS diode. Finite element simulations are used to find the best anode layout of the JBS diode and optimize electric field termination in the integrated device to ensure their capability to operate at high voltage. Finally, a spin-on glass based process is developed for filling the gate trenches of the VJFET to improve long-term robustness in extreme environments. The integrated power switch developed in this thesis points to the attractions of monolithic integration in SiC power circuits. Analytical compact design equations derived here will facilitate faster and easier design of switches and rectifiers for desired circuit operation.Ph. D.Includes bibliographical referencesIncludes vitaby Rahul Radhakrishna
Effects of yogic intervention on pain scores and quality of life in females with chronic pelvic pain
No full textContext: Chronic pelvic pain (CPP) is a common condition of women of the reproductive age group. It has a negative impact on a woman′s personal health and quality of life (QOL). Practicing yoga has shown numerous benefits in various chronic painful conditions.
Aim: To study the effects of yogic intervention on pain scores and quality of life in females of reproductive age group with CPP, on conventional therapy.
Settings and Design: It is a follow-up, randomized case-control study done in a tertiary care hospital.
Subjects and Methods: Sixty female patients of CPP in the age group of 18-45 years were randomly divided into Group I (n = 30) and Group II (n = 30). Group I received only conventional therapy in the form of NSAIDS and Group II received yoga therapy in the form of asanas, pranayama, and relaxation along with the conventional therapy for 8 weeks. They were assessed twice (pre- and post-treatment) for pain scores through visual analog scale (VAS) score and QOL by the World Health Organization quality of life-BREF (WHOQOL-BREF) questionnaire.
Statistical Analysis Used: Repeated measure ANOVA followed by Tukey′s test. P < 0.05 was considered significant.
Results: After 8 weeks of yogic intervention, Group II patients showed a significant decrease in intensity of pain seen by a decrease in VAS score (P < 0.001) and improvement in the quality of life with a significant increase (P < 0.001) in physical, psychological, social, and environmental domain scores of WHOQOL-BREF.
Conclusions: The practice of yoga causes a reduction in the pain intensity and improves the quality of life in patients with chronic pelvic pain
Hamiltonian Implementation using Photonic Coupled Cavity Arrays
No full textThesis (Ph.D.)--University of Washington, 2023Quantum simulators are devices made up of quantum mechanical components that can be used to study otherwise hard-to-probe quantum systems in a laboratory environment. These work by implementing Hamiltonians that accurately describe complex quantum phenomena and allow full control over the underlying parameters dictating the physics. Using photons as particles to study various physical phenomena forms the basis of some of the most promising paradigms for realizing these quantum simulators. A typical photonic quantum simulator consists of a lattice of programmable non-linear resonators, also called coupled cavity arrays (CCAs), with complete access to the Hamiltonian being simulated. While recently, numerous works on quantum simulation with microwave photons have attracted popular attention, using higher-energy optical photons can provide several additional advantages. In this thesis, we engineer photonic CCAs operating in the optical regime, which can be used for various quantum applications. For photonic CCAs to be used as quantum simulators, they need to be scalable, measurable, and controllable. In this work, we go over approaches satisfying each of these criteria. First, we tackle the scalability requirement by demonstrating photonic CCAs implementing the Su-Schrieffer-Heeger (SSH) model describing a polyacetylene molecule. We discuss the operation regime we need to be in for optical CCAs to be scalable to a large number of sites and use the SSH Hamiltonian as a toy model to depict the photonic design requirements that need to be met to do so. We then discuss the measurability of the realized CCAs by proposing algorithms to perform tomography of the implemented Hamiltonians by measuring only at the sites forming the outermost boundaries of these lattices. Next, we focus on adding controllability to our photonic CCAs and, to that end, develop novel thermo-optical heaters that allow us to have active control over the implemented Hamiltonian parameters. Finally, we conclude the thesis by briefly proposing a paradigm whereby, following the approach outlined in this work and utilizing the recent advancements in integrating novel quantum emitters with photonic cavities, we can realize truly scalable photonic quantum simulators
Hypospadiac urethral duplication- A rare variant and novel use of snodgrass urethroplasty
No full textUrethral duplication is a spectrum of congenital anomalies that is more common in males, but very little is known about the possible reconstruction methods and their outcome. Hypospadiac urethral duplication is a variety treated with onlay preputial flap. We report a 3-year-old patient of hypospadiac duplication who was treated with a single-stage urethroplasty. An excellent cosmetic and functional outcome were achieved by dorsal to ventral urethra-urethrostomy and novel application of tubularized incised plate technique for urethroplasty
Short review on environment and health effect of nanotoxicology
No full textNanotechnology is a brand-new area of scientific research that has revolutionized the manufacturing sector. The emphasis of this revolution was on the large-scale development of nano-based materials. Materials confinement in small structures, quantum mechanics, the high surface volumes ratio or other unusual properties, phenomena, and processes dominate nanoparticle behavior use of the nanomaterial containing items on the rise, posing a threat to the environment and human health. For the sake of human health and protection in the community, it's important to understand the toxicity of engineered nanomaterials or nano-based products. Nanotoxicology aims to identify potential toxins' toxicological practices in nanomaterials and these products to assess how these materials endanger human health. In this sense, nanoparticles and their fate in the atmosphere have been examined concerning air, water, and soil. Nanomaterials' health effects, such as their impact on various organ systems, have also been mentioned
Conjoined thoracopagus twins: A systematic review of the anomalies and outcome of surgical separation
No full textIntroduction: Conjoined twin is an extremely rare condition and requires a thorough knowledge of anatomy, and a multidisciplinary approach is essential to successfully separate the twins. Thoracopagus twins lie face to face and are attached from chest to upper abdomen. They are the most common among all the varieties but have a poor survival rate. Materials and Methods: This study is a review of literature from 2019 to the oldest via PubMed and Google Scholar using keywords: Conjoined twins, Thoracopagus twins, Thoracoomphalopagus and Thoraco-omphalopagus twins. The articles were reviewed for the description of the anatomy of shared organs, management and outcome of these twins. Results: One hundred and fifty-eight sets of thoracopagus and thoraco-omphalopagus twins including our twins were included in this study. Out of 158 reported thoracopagus twin sets in literature, with M: F ratio of 1:2.3, 71 sets were found to be non-operable and all of them subsequently expired; 82 sets were operated upon, out of which 83 babies survived, suggesting an overall surgical success rate of about 50%. Conclusion: Thoracopagus twins have a dismal prognosis. The most important decisive parameter for successful separation is the extent of sharing of organs between twins. The role of a motivated multidisciplinary team is also indispensable and cannot be overemphasised
Chiral superconductivity from repulsive interactions in doped graphene
No full textAuthor Manuscript 17 Sep 2011Chiral superconductivity, which breaks time-reversal symmetry, can exhibit a wealth of fascinating properties that are highly sought after for nanoscience applications. We identify doped graphene monolayer as a system where chiral superconductivity can be realized. In this material, a unique situation arises at a doping where the Fermi surface is nested and the density of states is singular. In this regime, d-wave superconductivity can emerge from repulsive electron–electron interactions. Using a renormalization group method, we argue that superconductivity dominates over all competing orders for generic weak repulsive interactions. Superconductivity develops simultaneously in two degenerate d-wave pairing channels. We argue that the resulting superconducting state is of chiral type, with the phase of the superconducting order parameter winding by 4π around the Fermi surface. Realization of this state in doped graphene will prove that superconductivity can emerge from electron–electron repulsion, and will open the door to applications of chiral superconductivity
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