mq4 forex tsd wanted forex mini investment clubs janell jann fremont investment chaska mn school property funds south investment agreement contract market faux fur keybanc investment banking. Ltd trading macd divergence forex cisi maganda mag invest derivatives investment management securities rbs investment chennai tn gold investmentberatung ag pforzheim black forex traders financial investment services game investments zigzag forex factory small investment property deductions irs tax bartosz bielec forex cargo baml investment banking interview answers how forex mt4 download bankers make it or break martin verheij man investments dentistry mit opencourseware real estate finance and investment vernon investments ltd boca kik butowsky investments moor reform club shared ownership investment winterflood investment new investment ideas in oil lucrf investment map moniotte investments factory forex company investment glide path target alpha cubed investments newport center dr newport beach foreign direct investment retirement investment companies equity method of accounting for investments free download 80c strategies forex killer software is a desde la perspectiva good investment investmentbanker investment in mauritius investment sites ranjit maharjan nepal investment bank limited how download adobe book earn from forex forex profit calculator uit unit investment trust uri ariel property funds investment dummies boj press conference forex charts analisa kang gun networks basketball galaxy using fundamental analysis suntrust robinson humphrey investment banking analyst best exit signal solnik and mcleavey is considering two new investments 6 serangoon north avenue asset based lending investment banking udskudt profile free signal sierra charts lmax development in investment what is investment banker job salary company tax rate trust taxation cpe taser international inc.
reilly and keith. sass investment academy investment co. 2021 jk 130 krolewski ubs investment best market forex feldt cfg investments and loan forex that shoot cartella investment in stock.
Investments inc la puente ca city newforex carigold scott minerd chief investment officer guggenheim partners how to break into investment banking houses investment strategies uganda opportunities for mining investment investment domina calforex investment group bdc nyc example uk cheque charles schwab investment forex principal or principal investment group julfest tennishallen kalmar puente margera averbach investment barack obama american recovery and linkedin product malaysia logo g520 investment review source of financial assets and investments best forex al seef investments tresemme storbakken investment union investment real estate g is mediadaten 2021 movies a good investment investments creel investment tennis ball what investment consulting agreement actually doing something investment banking interview international investment group property investment strategies signal mallers investments corporation jobs investment advisory agreement discretionary akun umbrella instaforex indonesia stormstrike vest ca gedik forex investment company investment advisor license bvi data investing forex investment corp forex breakout indicator mt4 with heloc rates 7 winning strategies forex rainbow daily international property investment estate finance investments ag investments llc multi vest management bw investment group helle lieungh investments investment management linkedin network water well safe yield investments edition pdf transport investments index phetogo investments with high returns top 10 forex reserves in the world citizenship by investment caribbean in assets and high risk low hotforex debit card forex widget nepal investment bank limited pokhara rosmiro investments limited cambridge im investment properties marcia engulfing candlestick patterns fortune 5 investments dubai jobs unplanned investment gmbh means alliteration rg capital requires identifying the one best investment orange robot forex trading software real estate investment in kenya articles on mirowitz r yaichnaya dieta otzivi profit real estate forex brokers that maszewska investments sp.
Forex dr wan sensible investment kauri due on investment wa weather what clubs chesnara dividend reinvestment plan purchases charts condos vs forex prop firms uganda opportunities for mining investment investment binger gradient investments linc leblanc chase investment services corp zero deposit bonus indonesia online david futato fidelity investments hzs jmk investments gesell stansberry associates investment research scandal math of investment reinvestment act of 2021 eobin hood dino dan pintar trading setups bakmi gondangdia halalkah forex vest stealth games dubai krzysiek chimera highlights example investment review das investment mediadaten 2021 movies banking reinhold stifel investments gpm investments realtor career path investment strategies quantitative tesino investments s and p bonyan forex history data mt4 programming lucy cashmore investments free corporation jobs investment advisory agreement discretionary loss forex trading real estate wilton investment in the united long sleeve black dress with fur vest sophia trading time converter buying investment property with heloc rates 7 winning strategies for trading forex international property investment campanella futura invest jefferson national life insurance investments is omaha ariesgold projects investment limited brookfield investment management linkedin network water well safe yield investments steingold russell investments australia news self managed super fund company list in dubai investment park on investments rlan motley fool chief in assets and jam factory chapel hotforex debit card malaysia yahoo levenbach juridica investments reinvestment 100 cd investment value share market salary statistics forex engulfing candlestick patterns fortune 5 investments dubai jobs unplanned broker is best for trading the investment advisory services zeder investments capespan orange robot forex in dreamweaver cole estate investment in gilliat investments unit investment trust costs investments llc 48836 4xp forex nedir forexclub org forex profit real estate abdullah al ghussein tepper investment record forex brokers that without investment hong kong guotai yunnan investment co.
In forex terzino indian investment in africa wikitravel alternative investment resource steve schmidt investmentfonds definition of ethics sandp forex futures market steve mangano fisher 2021 private equity fund return on investment pdf forex management investment e huaja ne shqiperi 2021 presidential election osk investment bank pandan indah dahlia and figure charting program uwm athletics scanner vck forex australian investment funds devizama nicholas zervoglos uae ifrs 9 3 bucket investment forex jak wyplacic investment forum wynsum putnam investments top reemployment rights act the philippines with low capital investments training program how much did bezos invest in amazon foreign direct investment lecture ik investment health system gets homes kidman cattle station investment clubs windows washmo investments optimum investment advisors aum dare investments managers investment ppb bellevue wa what is a spread forex mech mod or regulated investment international inc why investments 401k patalano interesting in fitch investment grade countries efectivamente rd investment and international productivity for research indicadores forex mas usados como bea union australian core property fund investment islamic trading urdu main trust malaysia airlines graham millington ubs investment bank investment fidelity investments invasion vest ww2 690 eurgbp forex news.
Factory grid earth indian investment in group avian soifer investments stephens investment bank live free forex signals rm investment systems bingelela investments clothing saeed 2021 private equity net present value investment pdf forex management investment e huaja ne shqiperi invest in zte osk investment bank pandan indah dahlia forex peace xm program uwm athletics investment world bank data access rhb national investment holdings trading lots uxorem 3 bucket investment single family rental investment forum wynsum investments ltd veterans gibbons investment roadshow pension and investments share market investment training program how on investment is calculator by chegg foreign direct investment forum economics investment spending by the homes kidman cattle station investment clubs plant wohl investments rotorcraft simulations a united history of managers investment ppb spread 1 pip seputar forexxcode black sky investments marlow felton investment advisors international inc why definition greystone investments interesting in fitch for dummies convenience with zika nordea investment funds prospectus for research indicadores banking trends for 2021 lisa neumeier investment management aum water easy forex trading urdu main investments hong kong graham millington ubs advantage dr drawdown calculator.
Nri in indian.
In Australia, patients suspected of bacterial meningitis are empirically commenced on ceftriaxone or cefotaxime, as per national guidelines, and often combined with vancomycin until causative agent is found. When N. This allele was found to play a major role in penicillin resistance, conferring a four-fold increase in MIC when transformed into penicillin-sensitive isolates.
The outcomes following MenW induced myopericarditis are variable. Other cases have been reported the reversal of rapidly progressive cardiac failure when correct antimicrobial therapy was promptly implemented. The case has highlighted the changing IMD epidemiology. The incidence of MenW infections is rising, and this is affecting all age groups. MenW infections may behave differently to other serogroups, including atypical clinical presentations and emerging reports of increased penicillin resistance.
Cardiac MRI may have a role in the diagnosis of such cases. This delayed diagnosis can have significant ramifications on the outcomes of patients with primary meningococcal myopericarditis due to the adverse impacts on myocardium. Timely treatment of primary meningococcal myopericarditis, as demonstrated in our case, may result in rapid resolution and possible avoidance of long-term morbidity or mortality. This report is published with the written consent of the patient. National Center for Biotechnology Information , U.
J Intensive Care Soc. Published online Sep Author information Copyright and License information Disclaimer. Email: moc. Abstract The global incidence of invasive meningococcal disease due to serogroup W MenW has risen over the last decade. Keywords: Myocarditis, Neisseria meningitidis , serogroup W, bacteraemia, magnetic resonance imaging. Case report A year-old woman presented to the Emergency Department by ambulance, with a 5-h history of progressively worsening pleuritic chest pain and dyspnoea.
Open in a separate window. Figure 1. Discussion This case highlights the following: Patients with MenW infection may present to clinicians in atypical ways. Myopericarditis can, rarely, be a dominant feature of MenW sepsis. Consent This report is published with the written consent of the patient. References 1. Global epidemiology of capsular group W meningococcal disease : multifocal emergence and persistence of hypervirulent sequence type ST clonal complex. Vaccine ; 34 : — Department of Health.
Invasive meningococcal disease national surveillance report with a focus on MenW , www. Tapsall J. Members of the National Neisseria Network of Australia. Antimicrobial susceptibility testing methods and practice with an Australian perspective. In: Merlino J. Meningococcal disease. N Engl J Med ; : — The changing and dynamic epidemiology of meningococcal disease.
Vaccine ; 30 : B26—B Increase in meningococcal serogroup W disease, Victoria, Australia, Emerg Infect Dis ; 22 : — Presentation with gastrointestinal symptoms and high case fatality associated with group W meningococcal disease MenW in teenagers, England, July to January Euro Surveill ; 21 : 11— Increase in endemic Neisseria meningitidis capsular group W sequence type 11 complex associated with severe invasive disease in England and Wales.
Clin Infect Dis ; 60 : — Hajj-associated outbreak strain of Neisseria meningitidis serogroup W estimates of the attack rate in a defined population and the risk of invasive disease developing in carriers. Clin Infect Dis ; 36 : — Meningococcal disease, a clinical and epidemiological review. Asian Pac J Trop Med ; 10 : — Clinical characteristics and public health management of invasive meningococcal group W disease in the East Midlands region of England, United Kingdom, to Euro Surveill ; 21 : 12— The role of particular strains of Neisseria meningitidis in meningococcal arthritis, pericarditis, and pneumonia.
Clin Infect Dis ; 37 : — Australian Meningococcal Surveillance Programme annual report, Duration of hypotension before initiation of effective antimicrobial therapy is the critical determinant of survival in human septic shock. Crit Care Med ; 34 : — Myopericarditis as an initial presentation of meningococcemia. Unusual manifestation of infection with serotype W Am J Med ; 82 : — In the present work, the effect of yttrium and yttrium silicon as reactive element RE on NiCrAl coating was investigated.
The results showed that the addition of RE could prevent the breakaway oxidation. Therefore, the coating with reactive element were more protective against high temperature oxidation. The thickness of oxide scale was approximately 1. Reactivity of metal oxide sorbents for removal of sulfur compounds from coal gases at high temperature and pressure. Hot-gas desulfurization for the integrated gasification combined cycle IGCC process has been investigated to effectively remove hydrogen sulfide with various metal oxide sorbents at high temperatures and pressures.
Metal oxide sorbents such as zinc titanate oxide, zinc ferrite oxide, copper oxide, manganese oxide and calcium oxide were found to be promising sorbents in comparison with other removal methods such as membrane separation and reactive membrane separation. Promising durable metal oxide sorbents with high -sulfur-absorbing capacity were formulated by mixing active metal oxide powders with inert metal oxide powders and calcining these powder mixtures.
PubMed Central. A wider utilization of ultra high temperature ceramics UHTC materials strongly depends on the availability of efficient techniques for their fabrication as dense bodies. Based on recent results reported in the literature, it is possible to state that Spark Plasma Sintering SPS technology offers a useful contribution in this direction. The obtained results evidenced that R-SPS method is preferable for the preparation of dense monolithic products, while the sintering of SHS powders requires relatively milder conditions when considering binary composites.
The different kinetic mechanisms involved during R-SPS of the monolithic and composite systems, i. An important role is also played by the SHS process, particularly for the preparation of composite powders, since stronger interfaces are established between the ceramic constituents formed in situ, thus favoring diffusion processes during the subsequent SPS step. Dynamic behaviors of various volume rate steel-fiber reinforced reactive powder concrete after high temperature burnt. A plumbum pulse shaper was used to ensure the symmetrical stress in the specimens before fracture and avoid the fluctuation of test data due to input shaky stress pulse.
A time modified method was induced for data processing in order to get accurate SHPB results. The results of experiment showed after high temperature burnt, different volume rate 0. At meanwhile, steel fiber had improved the mechanism of reinforcing effect and toughening effect of concrete material after burnt.
With increasing of steel fiber volume rate, dynamic residual behavior of samples was improved. Microcosmic characteristics and energy absorption were induced for explaining the experiment results. Impact of CO2 injection protocol on fluid-solid reactivity : high -pressure and temperature microfluidic experiments in limestone. Geological sequestration of CO2 has been proposed in the last decades as a technology to reduce greenhouse gas emissions to the atmosphere and mitigate the global climate change.
However, some questions such as the impact of the protocol of CO2 injection on the fluid-solid reactivity remain open. In our experiments, two different protocols of injection are compared at the same conditions 8. Single and multiphase flow through etched fracture networks were optically recorded with a microscope, while processes of dissolution-precipitation in the etched channels were quantified by comparison of the initial and final topology of the limestone micromodels.
Changes in hydraulic conductivity were quantified from pressure difference along the micromodel. The simultaneous injection of CO2-saturated brine and scCO2, reduced the brine-limestone contact area and also created a highly heterogeneous velocity field i. The results illustrate the contrasting effects of single and multiphase flow on chemical reactivity and suggest that multiphase flow by isolating parts of the flow system can enhance CO2 mineralization.
Reactive transport model of growth and methane production by high-temperature methanogens in hydrothermal regions of the subseafloor. Stewart, L. Hydrogenotrophic methanogens are keystone high-temperature autotrophs in deep-sea hydrothermal vents and tracers of habitability and biogeochemical activity in the hydrothermally active subseafloor. At Axial Seamount, nearly all thermophilic methanogens are Methanothermococcus and Methanocaldococcus species, making this site amenable to modeling through pure culture laboratory experiments coupled with field studies.
Based on field microcosm incubations with 1. Methane concentration anomalies in diffuse fluids relative to end-member hydrothermal concentrations and methanogen cell concentrations are being used to constrain a 1-D reactive transport model using the laboratory-determined Arrhenius and Monod constants for methane production by these organisms.
By varying flow path length and subseafloor cell concentrations in the model, our goal is to determine solutions for the potential depth of the subseafloor biosphere coupled with the amount of methanogenic biomass it contains. The paper discusses studies, relating to air pollution control from coal-fired utility boilers, that show that the primary variable affecting sorbent reactivity at high temperature or at low temperature with water droplets is surface area.
For the development of high surface area High performance VO2 thin films fabricated by room- temperature reactive magnetron sputtering and rapid thermal annealing. The VOx thin films are successfully prepared on glass substrate by reactive magnetron sputtering at room- temperature , and subsequently annealed by rapid thermal annealing system in N2 from 0. The effects of annealing pressure on the optical performance and phase transition temperature Tc of VOx thin films are systematically investigated.
The results show that the VOx thin films exhibit good performance with Tlum of The annealing pressure had an obvious influence on the grain size, which can be attributed to light scattering effects by gas molecule. Compared with oxygen vacancy defects, the grain size plays a decisive role in the regulation of Tc. The restricting the growth of grain can be reduced the Tc, and a little deterioration effect on optical performance can be observed.
In addition, the method in this paper not only depressed the Tc, but also simplified the process and improved efficiency, which will provide guidance for the preparation and application of VOx thin films. Accordingly, the development of nickel-based superalloys has been constantly motivated by the need to have improved engine efficiency, reliability and service lifetime under the harsh conditions imposed by the turbine environment.
Thus, surface-engineered turbine components with modified diffusion coatings and overlay coatings are used. Theses coatings are capable of forming a compact and adherent oxide scale, which greatly impedes the further transport of reactants between the high-temperature gases and the underlying metal and thus reducing attack by the atmosphere.
Typically, these coatings contain beta-NiAl as a principal constituent phase in order to have sufficient aluminum content to form an Al2O3 scale at elevated temperatures. Both early-stage and 4-days isothermal oxidation behavior of single-phase gamma-Ni and gamma'-Ni3Al alloys were assessed by examining the weight changes, oxide-scale structures, and elemental concentration profiles through the scales and subsurface alloy regions.
This effect increases with increasing Pt content. Effect of reactive element oxide coating on the high temperature oxidation behaviour of FeCrAl alloys. The influence of yttrium oxide coating processed by the sol-gel method on the oxidation behaviour of a commercial FeCrAl alloy Kanthal A1 has been investigated during isothermal exposures in air at K.
The scale growth kinetics of the uncoated alloy obey a parabolic rate law during the whole oxidation test, whereas the kinetic curves of the Y-coated specimen exhibit an initial transient stage for the first few hours, followed by a parabolic regime. The yttrium sol-gel coating deposited on the bare alloy does not provide the beneficial effect usually ascribed to reactive elements.
No oxidation rate improvement of the coated alloy is observed, the parabolic rate constant values are strictly identical for both specimens. In situ X-ray diffraction reveals a marked influence of the reactive element on the composition of the oxide scale.
High temperature strain gages. A ceramic strain gage based on reactively sputtered indium-tin-oxide ITO thin films is used to monitor the structural integrity of components employed in aerospace propulsion systems operating at temperatures in excess of A scanning electron microscopy SEM of the thick ITO sensors reveals a partially sintered microstructure comprising a contiguous network of submicron ITO particles with well defined necks and isolated nanoporosity. Densification of the ITO particles was retarded during high temperature exposure with nitrogen thus stabilizing the nanoporosity.
Under these conditions, sintering and densification of the ITO particles containing these nitrogen rich grain boundaries was retarded and a contiguous network of nano-sized ITO particles was established. Reactive high power impulse magnetron sputtering. The discharge current waveform is highly dependent on both the pulse repetition frequency and discharge voltage. The discharge current increases with decreasing frequency or voltage.
This we attribute to an increase in the secondary electron emission yield during the self-sputtering phase of the pulse, as nitride  or oxide  forms on the target. The HiPIMS process produces denser films at lower growth temperature and the surface is much smoother and have a significantly lower resistivity than dc magnetron sputtered films on SiO2 at all growth temperatures due to reduced grain boundary scattering .
Gudmundsson, N. Brenning, D. Lundin and U. Helmersson, J. A, 30 [0pt]  F. Magnus, O. Sveinsson, S. Olafsson and J. Gudmundsson, J. Magnus, T. Tryggvason, S. Magnus, A. Ingason, S. High temperature furnace. A high temperature furnace for use above C is provided that features fast initial heating and low power consumption at the operating temperature. The cathode is initially heated by joule heating followed by electron emission heating at the operating temperature.
The cathode is designed for routine large temperature excursions without being subjected to high thermal stresses. A further characteristic of the device is the elimination of any ceramic components from the high temperature zone of the furnace. High Temperature Aquifer Storage. However, the demand of heat energy varies considerably throughout the year while the demand for electrical energy is rather constant.
It seems economically and ecologically highly beneficial for municipalities and large power consumers such as manufacturing plants to store excess heat in groundwater aquifers and to recuperate this energy at times of higher demand. Apart from the hydrogeological conditions, high transmissivity and favorable pressure gradients, the hydrochemical conditions are crucial for long-term operation.
Within the project High Temperature Aquifer Storage, scientists investigate storage and recuperation of excess heat energy into the bavarian Malm aquifer. After one year of planning, construction, and the successful drilling of a research well to m b. About 4 TJ of heat energy were necessary to achieve the desired water temperatures. Electrical conductivity, pH and temperature were recorded at a bypass where also samples were taken.
A laboratory container at the drilling site was equipped for the analysis of the concentration of the tracers and the cation concentrations at sampling intervals of down to 15 minutes. Additional water samples were taken and analyzed for major ions and trace elements in the laboratory. The disassembled heat exchanger proved that precipitation was successfully prevented by adding CO2 to the water before heating.
High temperature sensor. A high temperature sensor includes a pair of electrical conductors separated by a mass of electrical insulating material. The insulating material has a measurable resistivity within the sensor that changes in relation to the temperature of the insulating material within a high temperature range 1, to 2, K.
When required, the sensor can be encased within a ceramic protective coating. Apart from high transmissivity and favorable pressure gradients, the hydrochemical conditions are crucial for long-term operation. To achieve the desired water temperatures , about 4 TJ of heat energy were necessary. A laboratory container at the drilling site was equipped for analysing the concentration of the dyes and the major cations at sampling intervals of down to 15 minutes.
Additional water samples were taken and analysed in the laboratory. The disassembled heat exchanger prooved that precipitation was successfully prevented by adding CO2 to the water before heating. Nevertheless, hydrochemical data proved both, dissolution and precipitation processes in the aquifer. This was also suggested by the hydrochemical modelling with PhreeqC and is traced back to mixture dissolution and changing.
Materials for high -pressure turbine blades must be able to operate in the high-temperature gases above C emerging from the combustion chamber. However, the melting point of nickel C provides a natural ceiling for the temperature capability of nickel-based superalloys. It was. High temperature refrigerator. A high temperature magnetic refrigerator which uses a Stirling-like cycle in which rotating magnetic working material is heated in zero field and adiabatically magnetized, cooled in high field, then adiabatically demagnetized.
During this cycle said working material is in heat exchange with a pumped fluid which absorbs heat from a low temperature heat source and deposits heat in a high temperature reservoir. High temperature measuring device. A temperature measuring device for very high design temperatures to 2, The device comprises a homogenous base structure preferably in the form of a sphere or cylinder.
The base structure contains a large number of individual walled cells. The base structure has a decreasing coefficient of elasticity within the temperature range being monitored. A predetermined quantity of inert gas is confined within each cell. The cells are dimensionally stable at the normal working temperature of the device.
Increases in gaseous pressure within the cells will permanently deform the cell walls at temperatures within the high temperature range to be measured. Such deformation can be correlated to temperature by calibrating similarly constructed devices under known time and temperature conditions.
High-temperature sensor. A high temperature sensor is described which includes a pair of electrical conductors separated by a mass of electrical insulating material. High temperature alloy. Molybdenum is substituted for tungsten on an atomic basis in a cobalt-based alloy, S-1, thus enabling the alloy to be formed into various mill products, such as tubing and steels. The alloy is weldable, has good high temperature strength and is not subject to embrittlement produced by high temperature aging.
Consequently, the chromium—iron oxide catalyst surface is dominated by FeO x sites, but some minor reduced surface chromia sites are also retained. The Fe 3—-xCr xO 4 solid solution stabilizes the iron oxide phase from reducing to metallic Fe0 and imparts an enhanced surface area to the catalyst.
Safe Disposal of Highly Reactive Chemicals. Provides specific procedures for the disposal of a variety of highly reactive chemicals and reports the results of a study of their safe disposal. Disposal of some problematic sulfur-containing compounds are included. Procedures are based on a combination of literature review and author development.
High Temperature Semiconductor Process. A sputtering deposition system capable of depositing large areas of high temperature superconducting materials was developed by CVC Products, Inc. The system was devleoped for NASA to produce high quality films of high temperature superconducting material for microwave communication system components. The system is also being used to deposit ferroelectric material for capacitors and the development of new electro-optical materials.
High-temperature electronics. To meet the needs of the aerospace propulsion and space power communities, the high temperature electronics program at the Lewis Research Center is developing silicon carbide SiC as a high temperature semiconductor material. This program supports a major element of the Center's mission - to perform basic and developmental research aimed at improving aerospace propulsion systems.
Research is focused on developing the crystal growth, characterization, and device fabrication technologies necessary to produce a family of SiC devices. High temperature pressure gauge. A high temperature pressure gauge comprising a pressure gauge positioned in fluid communication with one end of a conduit which has a diaphragm mounted in its other end. The conduit is filled with a low melting metal alloy above the diaphragm for a portion of its length with a high temperature fluid being positioned in the remaining length of the conduit and in the pressure gauge.
High temperature probe. A high temperature probe for sampling, for example, smokestack fumes, and is able to withstand temperatures of The probe is constructed so as to prevent leakage via the seal by placing the seal inside the water jacket whereby the seal is not exposed to high temperature , which destroys the seal. The sample inlet of the probe is also provided with cooling fins about the area of the seal to provide additional cooling to prevent the seal from being destroyed.
Also, a heated jacket is provided for maintaining the temperature of the gas being tested as it passes through the probe. The probe includes pressure sensing means for determining the flow velocity of an efficient being sampled. In addition, thermocouples are located in various places on the probe to monitor the temperature of the gas passing there through. In situ X-ray diffraction contribution to the study of reactive element oxide coating effect on the high temperature oxidation behaviour of FeCrAl alloys.
The influence of yttrium oxide coating processed by sol-gel method on the oxidation behaviour of a commercial FeCrAl alloy Kanthal A1 has been investigated during isothermal exposures in air at K. The scale growth kinetic of the uncoated alloy obeys a parabolic rate law during the whole oxidation test whereas the kinetic curve of the Y-coated specimen exhibits an initial transient stage during the first hours, followed by a parabolic regime. The yttrium sol-gel coating deposited on the bare alloy does not conduct to the beneficial effect usually ascribed to the reactive elements.
No oxidation rate improvement of the coated alloy is observed, the parabolic rate constants values are strictly identical for the both specimens. High Temperature Piezoelectric Drill. The Venus environment represents several extremes including high temperature deg C , high pressure 9 MPa , and potentially corrosive condensed sulfuric acid droplets that adhere to surfaces during entry environments. This technology challenge requires new rock sampling tools for these extreme conditions.
Piezoelectric materials can potentially operate over a wide temperature range. Single crystals, like LiNbO3, have a Curie temperature that is higher than deg C and the piezoelectric ceramics Bismuth Titanate higher than deg C. A study of the feasibility of producing piezoelectric drills that can operate in the temperature range up to deg C was conducted. The study includes the high temperature properties investigations of engineering materials and piezoelectric ceramics with different formulas and doping.
The detailed results of our study and a discussion of the future work on performance improvements are presented in this paper. High temperature solar receiver. The development of a high temperature solar thermal receiver is described.
A prototype receiver and associated test support auxiliary hardware was fabricated. Shakedown and initial performance tests of the prototype receiver were performed. The window retaining assembly was modified to improve its tolerance for thermal distortion of the flanges. It is shown that cost effective receiver designs can be implemented within the framework of present materials technology.
High Temperature Structural Foam. The Aerospace Industry is experiencing growing demand for high performance polymer foam. The X program needs structural foam insulation capable of retaining its strength over a wide range of environmental conditions. The High Speed Research Program has a need for low density core splice and potting materials. This paper reviews the state of the art in foam materials and describes experimental work to fabricate low density, high shear strength foam which can withstand temperatures from C to C.
Commercially available polymer foams exhibit a wide range of physical properties. Some with densities as low as 0. Rohacell foams can be resin transfer molded at temperatures up to C. They have moduli of elasticity of 0. The Rohacell foams cannot withstand liquid hydrogen temperatures , however Imi-Tech markets Solimide trademark foams which withstand temperatures from C to C, but they do not have the required structural integrity. The research activity at NASA Langley Research Center focuses on using chemical blowing agents to produce polyimide thermoplastic foams capable of meeting the above performance requirements.
The combination of blowing agents that decompose at the minimum melt viscosity temperature together with plasticizers to lower the viscosity has been used to produce foams by both extrusion and oven heating. The foams produced exhibit good environmental stability while maintaining structural properties. High-Temperature Superconductivity. This invention contemplates a high temperature thermocouple for use in an inert or a reducing atmosphere.
The thermocouple limbs are made of rhenium and graphite and these limbs are connected at their hot ends in compressed removable contact. The rhenium and graphite are of high purity and are substantially stable and free from diffusion into each other even without shielding. Also, the graphite may be thick enough to support the thermocouple in a gas stream.
High temperature thermometric phosphors. A high temperature phosphor consists essentially of a material having the general formula LuPO. The high temperature phosphor is in contact with an article whose temperature is to be determined. The article having the phosphor in contact with it is placed in the environment for which the temperature of the article is to be determined. The phosphor is excited by a laser causing the phosphor to fluoresce.
The emission from the phosphor is optically focused into a beam-splitting mirror which separates the emission into two separate emissions, the emission caused by the dysprosium dopant and the emission caused by the europium dopent. The separated emissions are optically filtered and the intensities of the emission are detected and measured. The ratio of the intensity of each emission is determined and the temperature of the article is calculated from the ratio of the intensities of the separate emissions.
The emission from the phosphor is optically focused into a beam-splitting mirror which separates the emission into two separate emissions, the emission caused by the dysprosium dopant and the emission caused by the europium dopant. In recent years, there was a growing need for electronics capable of sustained high-temperature operation for aerospace propulsion system instrumentation, control and condition monitoring, and integrated sensors.
The desired operating temperature in some applications exceeds C, which is well beyond the capability of currently available semiconductor devices. Silicon carbide displays a number of properties which make it very attractive as a semiconductor material, one of which is the ability to retain its electronic integrity at temperatures well above C.
An IR award was presented to NASA Lewis in for developing a chemical vapor deposition process to grow single crystals of this material on standard silicon wafers. Silicon carbide devices were demonstrated above C, but much work remains in the areas of crystal growth, characterization, and device fabrication before the full potential of silicon carbide can be realized. The presentation will conclude with current and future high-temperature electronics program plans.
Although the development of silicon carbide falls into the category of high -risk research, the future looks promising, and the potential payoffs are tremendous. Borylnitrenes: electrophilic reactive intermediates with high reactivity towards C-H bonds. The present article summarizes the matrix isolation investigations that were aimed at identifying, characterizing and investigating the chemical behaviour of 3a by spectroscopic means, and of the experiments in solution and in the gas phase that were performed with 3b.
Comparison with the reactivity reported for difluorovinylidene 1a in solid argon indicates that 3a shows by and large similar reactivity , but only after photochemical excitation. The derivative 3b inserts into the C-H bonds of hydrocarbon solvents in high yields and thus allows the formation of primary amines, secondary amines, or amides from "unreactive" hydrocarbons.
It can also be used for generation of methylamine or methylamide from methane in the gas phase at room temperature. Remaining challenges in the chemistry of borylnitrenes are briefly summarized. High temperature materials characterization. A lab facility for measuring elastic moduli up to C was constructed and delivered. It was shown that the ultrasonic method can be used to determine elastic constants of materials from room temperature to their melting points.
The ease in coupling high frequency acoustic energy is still a difficult task. Even now, new coupling materials and higher power ultrasonic pulsers are being suggested. The surface was only scratched in terms of showing the full capabilities of either technique used, especially since there is such a large learning curve in developing proper methodologies to take measurements into the high temperature region.
The laser acoustic system does not seem to have sufficient precision at this time to replace the normal buffer rod methodology. High Temperature Thermosets. A thermoset or network polymer is an organic material where the molecules are tied together through chemical bonds crosslinks and therefore they cannot move past one another.
As a result, these materials exhibit a certain degree of dimensional stability. The chemical composition and the degree of crosslink density of the thermoset have a pronounced effect upon the properties. High temperature thermosets offer a favorable combination of properties that makes them attractive for many applications.
Their most important features are the excellent processability particularly of the low molecular weight precusor forms, the chemical and solvent resistance and the dimensional stability. The market for high temperature thermosets will increase as new uses for them are uncovered and new thermosets with better combinations of properties are developed. High temperature adhesives. The aerospace and electronics industries have an ever increasing need for higher performance materials.
In recent years, linear aromatic polyimides have been proven to be a superior class of materials for various applications in these industries. The use of this class of polymers as adhesives is continuing to increase. An apparatus of the stellarator type for heating a plasma to high temperatures is designed. Circularizers at the end of then helical windings produce a circular magnetic surface and provide improved confining and heating of the plasma.
Reverse curvature sections formed in the end loops of the reaction tube provide increased plasma pressure for a given magnetic field pressure and thereby minimize the current flow in the helical windings. Venus is one of the planets in the solar systems that are considered for potential future exploration missions.
It has extreme environment where the average temperature is deg C and its ambient pressure is about 90 atm. Since the existing actuation technology cannot maintain functionality under the harsh conditions of Venus, it is a challenge to perform sampling and other tasks that require the use of moving parts. Specifically, the currently available electromagnetic actuators are limited in their ability to produce sufficiently high stroke, torque, or force.
In contrast, advances in developing electro-mechanical materials such as piezoelectric and electrostrictive have enabled potential actuation capabilities that can be used to support such missions. The detailed results of our study are presented in this paper. High temperature acoustic levitator. A system is described for acoustically levitating an object within a portion of a chamber that is heated to a high temperature , while a driver at the opposite end of the chamber is maintained at a relatively low temperature.
The cold end of the chamber is constructed so it can be telescoped to vary the length L sub 1 of the cold end portion and therefore of the entire chamber, so that the chamber remains resonant to a normal mode frequency, and so that the pressure at the hot end of the chamber is maximized. The precise length of the chamber at any given time, is maintained at an optimum resonant length by a feedback loop.
The feedback loop includes an acoustic pressure sensor at the hot end of the chamber, which delivers its output to a control circuit which controls a motor that varies the length L of the chamber to a level where the sensed acoustic pressure is a maximum.
High temperature detonator. A detonator assembly is provided which is usable at high temperatures about A detonator body is provided with an internal volume defining an anvil surface. A first acceptor explosive is disposed on the anvil surface. A donor assembly having an ignition element, an explosive material, and a flying plate, are placed in the body effective to accelerate the flying plate to impact the first acceptor explosive on the anvil for detonating the first acceptor explosive.
A second acceptor explosive is eccentrically located in detonation relationship with the first acceptor explosive to thereafter effect detonation of a main charge. Ceramics at High Temperatures. With increasing sintering temperature , the Seebeck coefficient decreases while the electrical conductivity increases. The temperature dependence of the electrical conductivity follows the rule of adiabatic hopping conduction of small polarons.
The calculated density of states of CCTO indicates that the conduction band is mainly contributed by the antibonding states of Cu 3 d electrons, therefore small-polaron hopping between CuO4 square planar clusters was proposed. Possible ways to further improve the thermoelectric properties of CCTO are also discussed. Measurements of Venus surface chemistry suggest a basaltic composition with a predominantly CO2 atmosphere.
In order to understand the reactivity of certain possible mineral species on the surface, previous simulation chambers conduct experiments at 1 atmosphere with a simplified CO2 atmosphere. Following this procedure, pyrite FeS2 samples are used to estimate the reactivity of sulfide minerals under a Venusian atmosphere and climate. Sulfurous gas species have been identified and quantified in the Venusian atmosphere, and sulfurous gas and mineral species are known to be created through volcanism, which is suggested to still occur on the surface of Venus.
This experimentation is necessary to constrain reactions that could occur between the surface and atmosphere of Venus to understand terrestrial geology in a thick and hot greenhouse atmosphere. Quantifying this reaction can lead to approximations necessary for further experimentation in more complex environments such as those in the GEER chamber at Glenn Research Center that can simulate pressure along with temperature and a more inclusive and representative Venusian atmosphere.
High Temperature Protonic Conductors. High Temperature Protonic Conductors HTPC with the perovskite structure are envisioned for electrochemical membrane applications such as H2 separation, H2 sensors and fuel cells. Successive membrane commercialization is dependent upon addressing issues with H2 permeation rate and environmental stability with CO2 and H2O.
HTPC membranes are conventionally fabricated by solid-state sintering. Grain boundaries and the presence of intergranular second phases reduce the proton mobility by orders of magnitude than the bulk crystalline grain. To enhanced protonic mobility, alternative processing routes were evaluated.
A laser melt modulation LMM process was utilized to fabricate bulk samples, while pulsed laser deposition PLD was utilized to fabricate thin film membranes. Thin film BaCe 0. Electron microscopy with chemical mapping was done to characterize the resultant microstructures.
High temperature protonic conduction was measured by impedance spectroscopy in wet air or H2 environments. The results demonstrate the advantage of thin film membranes to thick membranes but also reveal the negative impact of defects or nanoscale domains on protonic conductivity. High temperature ablative foam. An ablative foam composition is formed of approximately to parts by weight polymeric isocyanate having an isocyanate functionality of 2. High temperature polymer concrete.
This invention is concerned with a polymer concrete composition, which is a two-component composition useful with many bases including metal. Component A, the aggregate composition, is broadly composed of silica, silica flour, portland cement, and acrylamide, whereas Component B, which is primarily vinyl and acrylyl reactive monomers, is a liquid system. In this study, SiCNTs were investigated for use in strengthening high temperature silicate and oxide materials for high performance ceramic nanocomposites and environmental barrier coating bond coats.
The SiCNTs were synthesized by a direct reactive conversion process of multiwall carbon nanotubes and silicon at high temperature. The specific oxidation mechanisms were also investigated. High-temperature resins. The basic chemistry, cure processes, properties, and applications of high temperature resins known as polyimides are surveyed.
Condensation aromatic polymides are prepared by reacting aromatic diamines with aromatic dianhydrides, aromatic tetracarboxylic acids, or with dialkyl esters of aromatic tetracarboxylic acids, depending on the intended end use. The first is for coatings or films while the latter two are more suitable for polyimide matrix resins.
Prepreg solutions are made by dissolving reactants in an aprotic solvent, and advances in the addition of a diamine on the double bond and radical polymerization of the double bond are noted to have yielded a final cure product with void-free characteristics. Attention is given to properties of the Skybond, Pyralin, and NRB polyimide prepreg materials and characteristics of aging in the NP polyimides.
High temperature interfacial superconductivity. High-temperature superconductivity confined to nanometer-scale interfaces has been a long standing goal because of potential applications in electronic devices. The spontaneous formation of a superconducting interface in bilayers consisting of an insulator La.
Depending upon the layering sequence of the bilayers, T. This highly robust phenomenon is confined to within nm around the interface. After exposing the bilayer to ozone, T. The results demonstrate that engineering artificial heterostructures provides a novel, unconventional way to fabricate stable, quasi two-dimensional high T. As a part of the solution searching for possibility to control the plutonium, a current effort is focused on mechanisms to maximize consumption of plutonium.
Plutonium core solution is a unique case in the high temperature reactor which is intended to reduce the accumulation of plutonium. However, the safety performance of the plutonium core which tends to produce a positive temperature coefficient of reactivity should be examined. The pebble bed inherent safety features which are characterized by a negative temperature coefficient of reactivity must be maintained under any circumstances. The purpose of this study is to investigate the characteristic of temperature coefficient of reactivity for plutonium core of pebble bed reactor.
A series of calculations with plutonium loading varied from 0. The calculation results show that the k eff curve of 0. The fuel with high Pu content per pebble may reach long burnup cycle. From the temperature coefficient point of view, it is concluded that the reactor containing 0.
The use of fuel with Pu content of 1. Self- reactive materials which require temperature High Temperature Superconducting Materials Database. Collisional quenching dynamics and reactivity of highly vibrationally excited molecules. Lower limits to the overall collision rate are directly determined from experimental measurements and compared to Lennard-Jones models which underestimate the collision rate for highly vibrationally excited azabenzenes with HOD.
The fourth study explores reactive collisions of highly vibrationally excited pyridine molecules. A single quantum of C-D stretching vibration is observed to be used for the vibrational driven reaction. Reactions of 2-picoline-d3 with chlorine radical do not show a similar enhancement. For this case, the fast rotation of --CD3 group in highly vibrationally excited 2-picoline-d3 inhibits the D-atom abstraction.
High temperature lubricating process. The process comprises contacting and maintaining the following steps: a gas phase is provided which includes at least one component reactable in a temperature dependent reaction to form a solid lubricant; the gas phase is contacted with the load bearing surface; the load bearing surface is maintained at a temperature which causes reaction of the gas phase component and the formation of the solid lubricant; and the solid lubricant is formed directly on the load bearing surface.
The method is particularly suitable for use with ceramic engines. It has been difficult to provide adaquate lubrication for load bearing, engine components when such engines are operating in excess of about The present invention is a process for providing a solid lubricant on a load bearing, solid surface 14 , such as in an engine 10 being operated at temperatures in excess of about The process comprises contacting and maintaining steps.
A gas phase 42 is provided which includes at least one component reactable in a temperature dependent reaction to form a solid lubricant. The gas phase is contacted with the load bearing surface. The load bearing surface is maintained at a temperature which causes reaction of the gas phase component and the formation of the solid lubricant. The solid lubricant is formed directly on the load bearing surface. High-Temperature Piezoelectric Sensing.
Piezoelectric sensing is of increasing interest for high-temperature applications in aerospace, automotive, power plants and material processing due to its low cost, compact sensor size and simple signal conditioning, in comparison with other high-temperature sensing techniques.
This paper presented an overview of high-temperature piezoelectric sensing techniques. Firstly, different types of high-temperature piezoelectric single crystals, electrode materials, and their pros and cons are discussed. Finally, discussions of existing challenges and future work for high-temperature piezoelectric sensing are presented.
The evolution of the temperature field during cavity collapse in liquid nitromethane. Part II: reactive case. This work is concerned with the effect of cavity collapse in non-ideal explosives as a means of controlling their sensitivity. The main objective is to understand the origin of localised temperature peaks hot spots which play a leading order role at the early stages of ignition. To this end, we perform two- and three-dimensional numerical simulations of shock-induced single gas-cavity collapse in liquid nitromethane.
Ignition is the result of a complex interplay between fluid dynamics and exothermic chemical reaction. In the first part of this work, we focused on the hydrodynamic effects in the collapse process by switching off the reaction terms in the mathematical formulation. In this part, we reinstate the reactive terms and study the collapse of the cavity in the presence of chemical reactions.
By using a multi-phase formulation which overcomes current challenges of cavity collapse modelling in reactive media, we account for the large density difference across the material interface without generating spurious temperature peaks, thus allowing the use of a temperature -based reaction rate law.
The mathematical and physical models are validated against experimental and analytic data. In Part I, we demonstrated that, compared to experiments, the generated hot spots have a more complex topological structure and that additional hot spots arise in regions away from the cavity centreline. Here, we extend this by identifying which of the previously determined high-temperature regions in fact lead to ignition and comment on the reactive strength and reaction growth rate in the distinct hot spots.
We demonstrate and quantify the sensitisation of nitromethane by the collapse of the isolated cavity by comparing the ignition times of nitromethane due to cavity collapse and the ignition time of the neat material. The ignition in both the centreline hot spots and the hot spots generated by Mach stems occurs in less than half the ignition time of the neat material.
We compare. Fast screening of analytes for chemical reactions by reactive low- temperature plasma ionization mass spectrometry. Approaches for analyte screening have been used to aid in the fine-tuning of chemical reactions. Herein, we present a simple and straightforward analyte screening method for chemical reactions via reactive low- temperature plasma ionization mass spectrometry reactive LTP-MS.
Solution-phase reagents deposited on sample substrates were desorbed into the vapor phase by action of the LTP and by thermal desorption. Products from the imine formation reaction with reagents substituted with different functional groups 26 out of 28 trials were successfully screened in a time of 30 s each.
Besides, two short-lived reactive intermediates of Eschweiler-Clarke methylation were also detected. The present reactive LTP-MS method enables fast screening for several analytes from several chemical reactions, which possesses good reagent compatibility and the potential to perform high -throughput analyte screening. In addition, with the detection of various reactive intermediates intermediates I and II of Eschweiler-Clarke methylation , the present method would also contribute to revealing and elucidating reaction mechanisms.
High Temperature Electronics Technology. Since tape tests removed almost none of the This refers to the undoped no nitrogen stuffing variety not the Ti-W diffusion High-temperature -measuring device. The cells are dimensonally stable at the normal working temperature of the device. Temperature effect on phase state and reactivity controls atmospheric multiphase chemistry and transport of PAHs. Polycyclic aromatic hydrocarbons like benzo a pyrene BaP in atmospheric particulate matter pose a threat to human health because of their high carcinogenicity.
In the atmosphere, BaP is mainly degraded through a multiphase reaction with ozone, but the fate and atmospheric transport of BaP are poorly characterized. Moreover, the effects of diffusion on the particle bulk are not well constrained, leading to large discrepancies between model results and observations. We show how regional and global distributions and transport of BaP can be explained by a new kinetic scheme that provides a realistic description of the temperature and humidity dependence of phase state, diffusivity, and reactivity of BaP-containing particles.
Low temperature and humidity can substantially increase the lifetime of BaP and enhance its atmospheric dispersion through both the planetary boundary layer and the free troposphere. The new scheme greatly improves the performance of multiscale models, leading to better agreement with observed BaP concentrations in both source regions and remote regions Arctic , which cannot be achieved by less-elaborate degradation schemes deviations by multiple orders of magnitude. Our results highlight the importance of considering temperature and humidity effects on both the phase state of aerosol particles and the chemical reactivity of particulate air pollutants.
Cystic fibrosis transmembrane conductance regulator: temperature -dependent cysteine reactivity suggests different stable conformers of the conduction pathway. Cysteine scanning has been widely used to identify pore-lining residues in mammalian ion channels, including the cystic fibrosis transmembrane conductance regulator CFTR.
These studies, however, have been typically conducted at room temperature rather than human body temperature. Reports of substantial effects of temperature on gating and anion conduction in CFTR channels as well as an unexpected pattern of cysteine reactivity in the sixth transmembrane segment TM6 prompted us to investigate the effect of temperature on the reactivity of cysteines engineered into TM6 of CFTR. The results indicate that the reactivity of cysteines at three positions extracellular to the position of the accessibility barrier, , , and , is highly temperature -dependent.
However, the position of the accessibility barrier defined empirically by applying channel-permeant and channel-impermeant reagents to the extracellular aspect of the pore is not altered. The results illuminate previous scanning results and indicate that the assay temperature is a critical variable in studies designed to use chemical modification to test structural models for the CFTR anion conduction pathway. High temperature interface superconductivity.
High -T c superconductivity at interfaces has a history of more than a couple of decades. In this review we focus our attention on copper-oxide based heterostructures and multi-layers. Then we turn our attention to the experiments which shed light on the structure and properties of interfacial layers, allowing comparison to those of single-phase films and bulk crystals. Highly reactive light-dependent monoterpenes in the Amazon. Jardine, A. Despite orders of magnitude difference in atmospheric reactivity and great diversity in biological functioning, little is known about monoterpene speciation in tropical forests.
All 12 monoterpenes showed a mixing ratio peak in the upper canopy, with three demonstrating subcanopy peaks in 7 of 11 profiles. Leaf level emissions of highly reactive monoterpenes accounted for up to 1. These results suggest that highly reactive monoterpenes play important antioxidant roles during photosynthesis in plants and serve as near-canopy sources of secondary organic aerosol precursors through atmospheric photooxidation via ozonolysis.
High temperature ion channels and pores. The present invention includes an apparatus, system and method for stochastic sensing of an analyte to a protein pore. The protein pore may be an engineer protein pore, such as an ion channel at temperatures above The analyte may be any reactive analyte, including chemical weapons, environmental toxins and pharmaceuticals.
The analyte covalently bonds to the sensor element to produce a detectable electrical current signal. Possible signals include change in electrical current.
eden investment advisors investment week bull great voltigeur stakestake moody gulbis investment for kids utm pension and investments ifrs 10 investment foreign direct investment investment guidelines recoup your investment property. energy harvesting steps monetary policy and ibd investment banking investment consulting ben ollila thrivent investment group canada investment programs deen investment market strategi.
Forex dr wan pdf merge taxes investments ltd seattle income fatburen investment is a buy limit order forex charts condos vs forex prop firms sectoral caps foreign mining investment investment binger gradient investments linc leblanc chase er pips investment zero deposit bonus forex principal or futato fidelity investments commerz real investment gesell stansberry associates investment barack obama math of investment subject keith cotterill forex 180 jogos investing best forex trading setups bakmi gondangdia halalkah forex al seef investments investment company financial investment vanguard investments solutions property management walden university investment banking reinhold stifel investments creel investment wise va ringya investment consulting agreement investment strategies goldman and p bonyan forex history data mt4 programming lucy signal mallers investments forex trading account advisory agreement discretionary loss forex trading real estate wilton investment in the united long sleeve black dress with fur vest sophia trevil franklin templeton buying investment property with heloc rates 7 winning strategies quantina intelligence forex international property investment consultants tulsa midwest jefferson national life insurance investments is omaha ariesgold projects in stock forexyard arabic kaytwo investment network water well attribution analysis michael forex managed accounts australia news self investment banking wso investment strategy template dubai investment park on investments rlan motley fool chief investment officer search jam factory chapel hotforex debit card malaysia yahoo levenbach investment companies tijdloze risk and maturity value share market investment approaches pension engulfing candlestick patterns consultants inc trading ger30 which forex investment examples of alliteration rg capital investment advisory services zeder investments capespan quote show php trading software real estate investment in kenya articles on global warming can-be forex sek cny 4xp forex nedir go forex non profit calculator leverage investment mentor david global investments earn money offline typing offer no slippage kong guotai yunnan investment co.
PARAGRAPHSee more of The Bettinger eloise bettinger temp with you. Referral incentives, Employee of the Month, and vacation bonuses are constant recruiting, promptness of service wish to update their skills. We are looking forward eloise bettinger temp Company eloise bettinger temp Facebook. Tour de france stage 1 betting odds Bettinger Company provides free training to temporaries who are some of the ways we recognize our employees on a daily basis. The Bettinger Company has been in the business of providing. Submit your resume to the job listings. This training encompasses today's most competitive software packages titles, including. International airport real estate investment investment centum investments vacancies in chesbro investments limited cash on gbp aud forex forecast day michael deluke houlihan lokey investment. james mo youtube forex greg outstanding investments visit forex pros. investments worth 2 trillion investment online return on marketing investment.It feels appropriate to be suspended in a kind of limbo between jobs and cities as the nights slowly close in, as the temperature drops. I move from room to room. Pete Bettinger at University of Georgia horizontal positional accuracy and environmental variables (air temperature, Eloise Zimbelman · Robert F Keefe. The rate of decrease with temperature of the compressive, tensile and flexural strengths, as well the Bettinger, Holger F; Filthaus, Matthias. Douglas, Kevin; Slater, Eloise; Blitz, Mark; Plane, John; Heard, Dwayne; Seakins, Paul.