2,433 research outputs found
Marriage record of Baker, John L. and Hay, Mollie
No full textMarriage license for John L. Baker and Mollie Hay. S.G. Evans was the Justice of the Peace
The simulation of free surface flows with Computational Fluid Dynamics
No full textComputational fluid dynamics is a powerful and versatile tool for the analysis of flow problems encountered in themaritime environment. The University of Southampton Fluid-Structure Interactions research group use ANSYS CFX tomodel a wide variety of flow problems; to gain insight into flow physics, improve designs and increase the efficiencyand safety of marine vehicles. A series of three case studies from on-going research looks at: loads applied on liquefiednatural gas tanks due to sloshing, slamming pressures experienced by high speed craft as well as the influence ofpropellers on the resistance characteristics of autonomous underwater vehicles. The presence of the free surface,complex shapes and the unsteady nature of these applications make their simulation with computational fluid dynamicsparticularly challenging. The successful validation of the computational models has resulted in the development of aselection process for suitable multiphase models as well as cost-effective meshing strategies
Role of subintimal angioplasty in the treatment of chronic lower limb ischaemia
No full textOBJECTIVES: To determine the clinical outcome of subintimal angioplasty (SA) and to assess impact on surgical workload. DESIGN: Retrospective review of a single radiologist's case series. MATERIALS: One hundred and twenty two patients with critical limb ischaemia and 26 with claudication. METHODS: One hundred and fifty eight limbs treated by SA. MAIN OUTCOME MEASURES: Technical success and complications; cumulative patency, limb salvage and survival; affect of SA on vascular workload. RESULTS: The technical success rate was 85%. There were 26 procedural complications (16%) but no patient required emergency surgery; 30-day mortality was 3%. Primary and secondary 12-month patency rates were 27 and 33%. Limb salvage rate was 88% at 12 months. SA initially reduced the number of patients needing arterial surgery, although this then increased due to late failure of SA and an increase in de novo bypass. CONCLUSIONS: SA carries a low risk of major complications and high immediate technical success. Poor long-term patency suggests that SA is not as durable as bypass surgery. However, failed SA did not compromise subsequent surgery, which only became necessary in a proportion of patients. Our data suggests that there is little to be lost by using SA as first-line treatment for patients with limb-threatening ischaemia who are poor operative risks or who have no autologous vein available
University as Destiny: To the 65th Anniversary of Doctor of Historical Sciences, Professor S.G. Sidorov
No full textThe article is prepared for the 65th anniversary of Doctor of Historical Sciences, Professor of the Department of Russian and World History, Archaeology of Volgograd State University Sergey G. Sidorov. The article traces the biography of S.G. Sidorov, his pedagogical, scientific, and administrative activities. It is shown that fundamental foundations of the future pedagogical and scientific work of S.G. Sidorov were laid at the Faculty of History of Saratov State University named after N.G. Chernyshevsky, from which he graduated in 1981. Most of Sergey Grigoryevichs life is connected with Volgograd State University, where he has been working since 1986. He combined teaching historical disciplines with the administrative work. S.G. Sidorov was Vice-rector for Academic Affairs for 25 years. Being in this position he has done a lot to make Volgograd State University a leader in the region in training highly qualified specialists. S.G. Sidorov is one of the leading experts on the history of the Great Patriotic War. He is the author of the first fundamental comprehensive study of using labor of prisoners of war of the Second World War in the national economy of the USSR in 1939–1956. With his active participation, six volumes of Documents and Materials “Prisoners of War in the USSR. 1939–1956” were published. Since 2009, S.G. Sidorov has been the Head of the Dissertation Council on Historical Sciences at Volgograd State University. From 2014 to 2020, largely due to the efforts of S.G. Sidorov, Volgograd State University held five International Thematic Scientific Conferences “Military History of Russia: Problems, Searches, Solutions”
The Liebowitz Social Anxiety Scale as a self-report instrument: A preliminary psychometric analysis
No full textBaker SL, Heinrichs N, Kim HJ, Hofmann SG. The Liebowitz Social Anxiety Scale as a self-report instrument: A preliminary psychometric analysis. Behaviour Research and Therapy. 2002;40:701-715
January 25, 1905 Page four Mother of Thomas Delaney ill at Friday Harbor Continue to employ high priced men
No full textWilcox, W.A.; Baker, B.O.; Foster, Addison Gardner, 1837-1917; House, J.C.; Delaney, Thomas; Godfrey, A.N.; Weille [Weile], Otto A.; Trumbell, Thomas J.; Yerkes, S.G.; Searles, H.R.; Lyons, Frank;revenue cutter Thetis
Group at Rossland tennis tournament
No full textTop: W.G. Norris, S.G. Blaylock, Harry Goodeve, Bobby Schwartz, Chubb, Graham Cruickshank, Bill Atwood, George Ridpath, 2 unknown. 2nd row from top: unknown, Frank Willis, 2 unknowns, Guy Laffery, 3 unknowns, Mrs. Riddle of Montreal, Mrs. S.G. Blaylock, Lucia Merchant, Velma Smith, Mrs. C.B. Smith. 3rd row from top: T.W. Bingay, 2 unknowns, J. Buchanan, Georgia Martin, Doris Dempster, Eileen Pincott, 2 unknowns. Bottom Row: Mike Sullivan, Fred Townsend, Sophy Hiscox, George Murray, unknown, Billy Baker
Mesoscopic electrochemistry in nanofluidic devices
No full textThis thesis describes nanofluidic devices capable of detecting small numbers of redox-active molecules and even single molecules. The detection relies on redox cycling, in which diffusive molecules rapidly transfer electrons between two parallel electrodes embedded in a thin, solution-filled channel. This high sensitivity permits studying the mesoscopic regime of electrochemistry in which the discreteness of molecules and statistical fluctuations can no longer be ignored.Kavli Institute of NanoscienceApplied Science
Electrostatic sensing and electrochemistry with single carbon nanotubes
No full textThis thesis describes the experimental study of devices based on single carbon nanotubes in the context of (bio)sensing in aqueous solutions. Carbon nanotubes are cylindrical molecules of sp2- carbon, about one nanometer in diameter and typically several micrometers long, which have semiconducting or metallic electronic properties. Nanotube devices can interact both electrostatically and electrochemically with the solution and the (bio)molecules dissolved in it. We study these interactions electronically with the aim to learn how carbon nanotube devices interact with their environment and how they can be used as the active elements in highly sensitive nanoscale (bio)sensors. First, we study the electrochemical interaction of redox molecules with carbon nanotube devices. An applied potential difference over the interface between a carbon nanotube and the solution can drive the electrochemical transfer of electrons from dissolved redox molecules to the nanotube and vice versa. We demonstrate that individual carbon nanotubes, both metallic and semiconducting, can be used as nanoelectrodes for electrochemistry. Due to the small diameter of nanotubes, the relative influx of electrochemically active molecules is so high that the kinetics of charge transfer become rate limiting. We provide a theoretical description of electrochemical charge transfer at nanotube and graphene electrodes. We find that, although the distinct electronic structure of nanotubes does play a role in the charge transfer process, metallic and semiconducting nanotubes cannot readily be distinguished. Even when a semiconducting nanotube is switched OFF, charge transfer can still take place at high rates. Next we explore carbon nanotubes employed as liquid-gated field-effect transistors. Although the literature contains an increasing amount of studies that use nanotubes for sensing purposes, a thorough fundamental understanding of how exactly these transistors interact with their environment is lacking. We elucidate and demonstrate several physical mechanisms that allow nanotubes to act as nanoscale electrostatic sensors. We show that the sensor response can be affected by an artifact related to the reference electrode. By eliminating this artifact we can study the effect of biomolecule adsorption near nanotube sensors unambiguously. Then we describe a method to identify the different mechanisms that can lead to a sensor response. We find that the origin of sensor response to biomolecule adsorption is a combination of a change in surface potential, and alterations to the tunnel barrier at the nanotube-metal contact. Contact effects make sensing unreliable, but these can be suppressed by covering up the contact regions. Finally, we show that carbon nanotube and graphene transistors are sensitive to changes in the ionic strength, the pH, and even the type of ions of the electrolyte. Changes in these electrolyte properties lead to a sensor response by changing the surface charge and the spatial distribution of ions, and thus the surface potential. We proceed by studying the signal-to-noise ratio for biosensing with liquid-gated carbon nanotube transistors. We show that the low-frequency noise is consistent with the fluctuation of nearby charges that gate the nanotube through a field-effect. The power of the noise is inversely proportional to the length of the nanotube. Surprisingly, the signal-to-noise ratio is highest in the sub-threshold regime. The decrease of the signal-to-noise ratio in ON state is related to additional noise sources and depends on device architecture. In specific cases the back gate can enhance the signal-to-noise ratio. Finally, we report our exploratory studies of carbon nanotube sensors as probes to study living cells. Although our results are suggestive that we can successfully detect cellular activity, the transistor stability and electrochemical sensitivity need to be improved. We show that the electrochemical sensitivity can be improved by coating nanotubes with catalytic nanoparticles. In conclusion, we have studied carbon nanotube devices in aqueous solution. The work presented in this thesis elucidates a number of different physical mechanisms, both electrochemical and electrostatic, through which carbon nanotube devices can interact with their environment. In addition, many of the concepts developed and studied here may be extended to other nanoscale sensors, such as nanowires and graphene. This knowledge can be used to further exploit the unique properties of carbon nanotubes, and pursue the ultimate goals of single-molecule detection and single-cell probing.Applied Science
Charge inversion and DNA condensation by multivalent ions
No full textScreening of charged particles by mobile ions in electrolytes is a major focus of such diverse fields as polymer physics, nanofluidics, colloid science, and biophysics. Yet the physics often remains poorly understood. Here we focus on two counterintuitive phenomena induced by multivalent counterions: charge inversion and DNA condensation.Applied Science
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