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Sample records for henrys law constant

  1. Henry's law constants for dimethylsulfide in freshwater and seawater

    NASA Technical Reports Server (NTRS)

    Dacey, J. W. H.; Wakeham, S. G.; Howes, B. L.

    1984-01-01

    Distilled water and several waters of varying salinity were subjected, over a 0-32 C temperature range, to measurements for Henry's law constants for dimethylsulfide. Values for distilled water and seawater of the solubility parameters A and C are obtained which support the concept that the concentration of dimethylsulfide in the atmosphere is far from equilibrium with seawater.

  2. Henry's law constants for dimethylsulfide in freshwater and seawater

    NASA Technical Reports Server (NTRS)

    Dacey, J. W. H.; Wakeham, S. G.; Howes, B. L.

    1984-01-01

    Distilled water and several waters of varying salinity were subjected, over a 0-32 C temperature range, to measurements for Henry's law constants for dimethylsulfide. Values for distilled water and seawater of the solubility parameters A and C are obtained which support the concept that the concentration of dimethylsulfide in the atmosphere is far from equilibrium with seawater.

  3. Henry's law constants of some environmentally important aldehydes

    SciTech Connect

    Betterton, E.A.; Hoffmann, M.R.

    1988-12-01

    The Henry's law constants of seven aldehydes have been determined as a function of temperature by bubble-column and by head-space techniques. The compounds were chosen for their potential importance in the polluted troposphere and to allow structure-reactivity patterns to be investigated. The results (at 25/degree/C) are as follows (in units of M atm/sup /minus/1/): chloral, 3.44 /times/ 10/sup 5/; glyoxal, greater than or equal to3 /times/ 10/sup 5/; methylglyoxal, 3.71 /times/ 10/sup 3/; formaldehyde, 2.97 /times/ 10/sup 3/; benzaldehyde, 3.74 /times/ 10/sup 1/; hydroxyacetaldehyde, 4.14 /times/ 10/sup 4/; acetaldehyde, 1.14 /times/ 10/sup 1/. A plot of Taft's parameter, ..sigma..sigma*, vs log H* (the apparent Henry's law constant) gives a straight line with a slope of 1.72. H* for formaldehyde is anomalously high, as expected, but the extremely high value for hydroxyacetaldehyde was unexpected and may indicate that ..cap alpha..-hydroxy-substituted aldehydes could have an usually high affinity for the aqueous phase. The intrinsic Henry's law constants, H, corrected for hydration, do not show a clear structure-reactivity pattern for this series of aldehydes.

  4. Physicochemical properties of polycyclic aromatic hydrocarbons: Aqueous solubilities, n-octanol/water partition coefficients, and Henry`s law constants

    SciTech Connect

    Maagd, P.G.J. de; Opperhuizen, A.; Sijm, D.T.H.M.; Hulscher, D.T.E.M. ten; Heuvel, H. van den

    1998-02-01

    Aqueous solubilities, n-octanol/water partition coefficients (K{sub ow}S), and Henry`s law constants were determined for a range of polycyclic aromatic hydrocarbons (PAHs) using a generator-column, slow-stirring, and gas-purge method, respectively. The currently obtained data were compared to available literature data. For seven of the PAHs no K{sub ow}S previously were determined with the slow-stirring method. For four of the PAHs the present study reports the first experimental Henry`s law constants. Relationships between subcooled liquid solubilities, K{sub ow}S, and Henry`s law constants as a function of molar volume are discussed. A consistent data set was obtained, for which an excellent correlation was found between subcooled liquid solubility and molar volume. A linear fit did not accurately describe the relationship between log K{sub ow} and molar volume. This is probably due to a decreasing solubility in n-octanol with increasing molar volume. Finally, a high correlation was found between Henry`s law constant and molar volume. The presently obtained dataset can be used to predict the fate and behavior of unsubstituted homocyclic PAHs.

  5. Temperature dependence of Henry's law constants of metolachlor and diazinon.

    PubMed

    Feigenbrugel, Valérie; Le Calvé, Stéphane; Mirabel, Philippe

    2004-10-01

    A dynamic system based on the water/air equilibrium at the interface within the length of a microporous tube has been used to determine experimentally the Henry's law constants (HLC) of two pesticides: metolachlor and diazinon. The measurements were conducted over the temperature range 283-301 K. At 293 K, HLCs values are (42.6+/-2.8) x 10(3) (in units of M atm(-1)) for metolachlor and (3.0+/-0.3)x10(3) for diazinon. The obtained data were used to derive the following Arrhenius expressions: HLC=(3.0+/-0.4) x 10(-11) exp((10,200+/-1,000)/T) for metolachlor and (7.2+/-0.5) x 10(-15) exp((11,900+/-700)/T) for diazinon. At a cumulus cloud temperature of 283 K, the fractions of metolachlor and diazinon in the atmospheric aqueous phase are about 57% and 11% respectively. In order to evaluate the impact of a cloud on the atmospheric chemistry of both studied pesticides, we compare also their atmospheric lifetimes under clear sky (tau(gas)), and cloudy conditions (tau(multiphase)). The calculated multiphase lifetimes (in units of hours) are significantly lower than those in gas phase at a cumulus temperature of 283 K (in parentheses): metolachlor, 0.4 (2.9); diazinon, 1.9 (5.0).

  6. Effective Henry's Law constant measurements for glyoxal in model aerosols containing sulfate

    NASA Astrophysics Data System (ADS)

    Kampf, C. J.; Waxman, E.; Slowik, J. G.; Dommen, J.; Prevot, A. S.; Noziere, B.; Hoffmann, T.; Volkamer, R.

    2011-12-01

    Traditional models represent secondary organic aerosol (SOA) formation based on the gas-phase oxidation of a limited set of precursor molecules. However, these models tend to under-estimate the amounts and degree of oxygenation of actual SOA, indicating missing processes. One such source that has become increasingly important in recent years is glyoxal (CHOCHO, the smallest alpha-dicarbonyl). Unlike traditional SOA precursors, glyoxal forms SOA by partitioning to the aqueous phase according to Henry's Law. This work presents an analysis of Henry's Law constants for glyoxal uptake to laboratory-generated aerosols in a dynamically coupled gas-aerosol system. We combine CU LED-CE-DOAS measurements of gas-phase glyoxal with online HR-Tof-AMS and time-resolved HPLC ESI MS/MS particle-phase measurements to characterize the time resolved evolution of glyoxal partitioning, and relate molecular-specific measurements to AMS mass spectra. The experiments were performed in the simulation chamber facility at PSI, Switzerland, and investigate ammonium sulfate (AS), and mixed AS / fulvic acid seed aerosols under relative humidity conditions ranging from 50 to 85% RH. The Henry's Law and effective Henry's Law constants are compared with other values reported in the literature.

  7. Effective Henry's Law constant measurements for glyoxal in model aerosols containing sulfate

    NASA Astrophysics Data System (ADS)

    Kampf, C.; Waxman, E.; Slowik, J.; Dommen, J.; Prevot, A.; Baltensperger, U.; Noziere, B.; Hoffmann, T.; Volkamer, R.

    2012-04-01

    Traditional models represent secondary organic aerosol (SOA) formation based on the gas-phase oxidation of a limited set of precursor molecules. However, these models tend to under-estimate the amounts and degree of oxygenation of actual SOA, indicating missing processes. One such source that has become increasingly important in recent years is glyoxal (CHOCHO, the smallest alpha-dicarbonyl). Unlike traditional SOA precursors, glyoxal forms SOA by partitioning to the aqueous phase according to Henry's Law. This work presents an analysis of Henry's Law constants for glyoxal uptake to laboratory-generated aerosols in a dynamically coupled gas-aerosol system. We combine CU LED-CE-DOAS measurements of gas-phase glyoxal with online HR-Tof-AMS and time-resolved HPLC ESI MS/MS particle-phase measurements to characterize the time resolved evolution of glyoxal partitioning, and relate molecular-specific measurements to AMS mass spectra. The experiments were performed in the simulation chamber facility at PSI, Switzerland, and investigate ammonium sulfate (AS), and mixed AS / fulvic acid seed aerosols under relative humidity conditions ranging from 50 to 85% RH. The Henry's Law and effective Henry's Law constants are compared with other values reported in the literature.

  8. Evaluation and Prediction of Henry’s Law Constants and Aqueous Solubilities for Solvents and Hydrocarbon Fuel Components. Volume 2. Experimental Henry’s Law Data

    DTIC Science & Technology

    1987-09-01

    HYDROCARBON FUEL COMPONENTS VOL II: EXPERIMENTAL HENRY’S LAW DATA N G.B. HOWE, M.E. MULLINS, T.N. ROGERS N RESEARCH TRIANGLE INSTITUTE P.O. BOX 12194 RESEARCH...constants agreed reasonably well (within 10 percent) with the batch air-stripping results and other reported experimental values. Measurements were conducted...OF THIS PAGE UNCLASSIFIED ITEM 19. ABSTRACT (Cont’d) in dilute aqueous solutions., Volume II: Experimental Henry’s Law Data (Volume Ii of 11I) This

  9. Henry's law constant for phosphine in seawater: determination and assessment of influencing factors

    NASA Astrophysics Data System (ADS)

    Fu, Mei; Yu, Zhiming; Lu, Guangyuan; Song, Xiuxian

    2013-07-01

    The Henry's Law constant ( k) for phosphine in seawater was determined by multiple phase equilibration combined with headspace gas chromatography. The effects of pH, temperature, and salinity on k were studied. The k value for phosphine in natural seawater was 6.415 at room temperature (approximately 23°C). This value increases with increases in temperature and salinity, but no obvious change was observed at different pH levels. At the same temperature, there was no significant difference between the k for phosphine in natural seawater and that in artificial seawater. This implies that temperature and salinity are major determining factors for k in marine environment. Double linear regression with Henry's Law constants for phosphine as a function of temperature and salinity confirmed our observations. These results provide a basis for the measurement of trace phosphine concentrations in seawater, and will be helpful for future research on the status of phosphine in the oceanic biogeochemical cycle of phosphorus.

  10. Temperature-dependent Henry's law constants of atmospheric organics of biogenic origin.

    PubMed

    Leng, Chunbo; Kish, J Duncan; Kelley, Judas; Mach, Mindy; Hiltner, Joseph; Zhang, Yunhong; Liu, Yong

    2013-10-10

    There have been growing interests in modeling studies to understand oxidation of volatile organic compounds in the gas phase and their mass transfer to the aqueous phase for their potential roles in cloud chemistry, formation of secondary organic aerosols, and fate of atmospheric organics. Temperature-dependent Henry's law constants, key parameters in the atmospheric models to account for mass transfer, are often unavailable. In the present work, we investigated gas-liquid equilibriums of isoprene, limonene, α-pinene, and linalool using a bubble column technique. These compounds, originating from biogenic sources, were selected for their implications in atmospheric cloud chemistry and secondary organic aerosol formation. We reported Henry's law constants (K(H)), first order loss rates (k), and gas phase diffusion coefficients over a range of temperatures relevant to the lower atmosphere (278-298 K) for the first time. The measurement results of K(H) values for isoprene, limonene, α-pinene, and linalool at 298 K were 0.036 ± 0.003; 0.048 ± 0.004; 0.029 ± 0.004; and 21.20 ± 0.30 mol L(-1) atm(-1), respectively. The fraction for these compounds in stratocumulus and cumulonimbus clouds at 278 K were also estimated in this work (isoprene, 1.0 × 10(-6), 6.8 × 10(-6); limonene, 1.5 × 10(-6), 1.0 × 10(-5); α-pinene, 4.5 × 10(-7), 3.1 × 10(-6); and linalool, 6.2 × 10(-4), 4.2 × 10(-3)). Our measurements in combination with literature results indicated that noncyclic alkenes could have smaller K(H) values than those of cyclic terpenes and that K(H) values may increase with an increasing number of double bonds. It was also shown that estimated Henry's law constants and their temperature dependence based on model prediction can differ from experimental results considerably and that direct measurements of temperature-dependent Henry's law constants of atmospheric organics are necessary for future work.

  11. Experimental determination of Henry's law constants of trifluoroacetic acid at 278-298 K

    NASA Astrophysics Data System (ADS)

    Kutsuna, Shuzo; Hori, Hisao

    Equilibrium partial pressures of trifluoroacetic acid ( P C(O)OH) over aqueous trifluoroacetic acid test solutions were determined at 278.15, 288.15, and 298.15 K. The concentration of undissociated trifluoroacetic acid ( C C(O)OH) in each test solution was determined by means of attenuated total reflection IR spectroscopy and window factor analysis. From the linear relationship between P C(O)OH and C C(O)OH, the Henry's law constant of trifluoroacetic acid ( KH) at 298.15 K was determined to be 5800±700 mol dm -3 atm -1 and KH at temperature T in K was determined to be KH=5780 exp[-4120×(1/298.15-1/ T)] in mol dm -3 atm -1. The KH value at 298.15 K was 0.65 times the reported value [Bowden, D.J., Clegg, S.L., Brimblecombe, P., 1996. The Henry's law constant of trifluoroacetic acid and its partitioning into liquid water in the atmosphere. Chemosphere 32, 405-420] for p Ka=0.47 and it was equal to that for p Ka=0.2.

  12. Smog chamber experiments to investigate Henry's law constants of glyoxal using different seed aerosols

    NASA Astrophysics Data System (ADS)

    Jakob, Ronit

    2014-05-01

    Aerosols play an important role in the chemistry and physics of the atmosphere. Hence, they have a direct as well as an indirect impact on the earth's climate. Depending on their formation, one distinguishes between primary and secondary aerosols[1]. Important groups within the secondary aerosols are the secondary organic aerosols (SOAs). In order to improve predictions about these impacts on the earth's climate the existing models need to be optimized, because they still underestimate SOA formation[2]. Glyoxal, the smallest α-dicarbonyl, not only acts as a tracer for SOA formation but also as a direct contributor to SOA. Because glyoxal has such a high vapour pressure, it was common knowledge that it does not take part in gas-particle partitioning and therefore has no impact on direct SOA formation. However, the Henry's law constant for glyoxal is surprisingly high. This has been explained by the hydration of the aldehyde groups, which means that a species with a lower vapour pressure is produced. Therefore the distribution of glyoxal between gas- and particle phase is atmospherically relevant and the direct contribution of glyoxal to SOA can no longer be neglected. A high salt concentration present in chamber seed aerosols leads to an enhanced glyoxal uptake into the particle. This effect is called "salting-in". The salting effect depends on the composition of the seed aerosol as well as the soluble compound. For very polar compounds, like glyoxal, a "salting-in" is observed[3]. Glyoxal particle formation during a smog chamber campaign at Paul-Scherrer-Institut (PSI) in Switzerland was examined using different seed aerosols such as ammonium sulfate, sodium chloride and sodium nitrate. The aim of this campaign was to investigate Henry's law constants for different seed aerosols. During the campaign filter samples were taken to investigate the amount of glyoxal in the particle phase. After filter extraction, the analyte was derivatized and measured using UHPLC

  13. Henry's law constants for paint solvents and their implications on volatile organic compound emissions from automotive painting

    SciTech Connect

    Kim, B.R.; Kalis, E.M.; DeWulf, T.; Andrews, K.M.

    2000-02-01

    This paper describes experimental results of equilibrium partitioning of several significant paint solvents and formaldehyde between air and water to quantify the potential for capturing and retaining the constituents in spraybooth scrubber water during automotive painting. The compounds studied are toluene, n-butanol, methyl ethyl ketone methyl propyl ketone, methyl isobutyl ketone, methyl amyl ketone, butyl cellosolve, butyl cellosolve acetate, butyl carbitol, and n-methyl-2-pyrrolidinone. A set of field data collected at a Ford Motor Company assembly plant was also analyzed to determine whether data were consistent with the equilibrium phenomenon. The primary findings include: (a) There were more than six orders of magnitude difference in the Henry's law constants among the solvents studied. A solvent with a smaller constant is less easily stripped from water. The Henry's law constants decrease in the following order: toluene and xylenes > methyl ethyl ketone > n-butanol > butyl cellosolve acetate > butyl cellosolve > formaldehyde > butyl carbitol > n-methyl-2-pyrrolidinone. (b) Field data showed accumulation of n-methyl-2-pyrrolidinone and stable concentrations of butyl carbitol, butyl cellosolve, and n-butanol in the paint-sludge pit water during a 2-month period. Stable concentrations indicate a continuous, balanced capture and stripping of the solvents. Data were consistent with measured Henry's law constants. (c) The low Henry's law constant for formaldehyde is the result of the fact that it is hydrated when dissolved in water.

  14. Henry's Law: A Retrospective

    ERIC Educational Resources Information Center

    Rosenberg, Robert M.; Peticolas, Warner L.

    2004-01-01

    A retrospective view of Henry's law and its applicability in any specific system at a finite concentration is tested. It can be concluded that Henry's law is only a limiting law and is adequate at low mole fractions but is useful for practical purposes where high precision is not required.

  15. Henry's Law: A Retrospective

    ERIC Educational Resources Information Center

    Rosenberg, Robert M.; Peticolas, Warner L.

    2004-01-01

    A retrospective view of Henry's law and its applicability in any specific system at a finite concentration is tested. It can be concluded that Henry's law is only a limiting law and is adequate at low mole fractions but is useful for practical purposes where high precision is not required.

  16. Effective Henry's law partitioning and the salting constant of glyoxal in aerosols containing sulfate.

    PubMed

    Kampf, Christopher J; Waxman, Eleanor M; Slowik, Jay G; Dommen, Josef; Pfaffenberger, Lisa; Praplan, Arnaud P; Prévôt, André S H; Baltensperger, Urs; Hoffmann, Thorsten; Volkamer, Rainer

    2013-05-07

    The reversible partitioning of glyoxal was studied in simulation chamber experiments for the first time by time-resolved measurements of gas-phase and particle-phase concentrations in sulfate-containing aerosols. Two complementary methods for the measurement of glyoxal particle-phase concentrations are compared: (1) an offline method utilizing filter sampling of chamber aerosols followed by HPLC-MS/MS analysis and (2) positive matrix factorization (PMF) analysis of aerosol mass spectrometer (AMS) data. Ammonium sulfate (AS) and internally mixed ammonium sulfate/fulvic acid (AS/FA) seed aerosols both show an exponential increase of effective Henry's law coefficients (KH,eff) with AS concentration (cAS, in mol kg(-1) aerosol liquid water, m = molality) and sulfate ionic strength, I(SO4(2-)) (m). A modified Setschenow plot confirmed that "salting-in" of glyoxal is responsible for the increased partitioning. The salting constant for glyoxal in AS is K(S)CHOCHO = (-0.24 ± 0.02) m(-1), and found to be independent of the presence of FA. The reversible glyoxal uptake can be described by two distinct reservoirs for monomers and higher molecular weight species filling up at characteristic time constants. These time constants are τ1 ≈ 10(2) s and τ2 ≈ 10(4) s at cAS < 12 m, and about 1-2 orders of magnitude slower at higher cAS, suggesting that glyoxal uptake is kinetically limited at high salt concentrations.

  17. Measurement of Henry's Law Constants Using Internal Standards: A Quantitative GC Experiment for the Instrumental Analysis or Environmental Chemistry Laboratory

    ERIC Educational Resources Information Center

    Ji, Chang; Boisvert, Susanne M.; Arida, Ann-Marie C.; Day, Shannon E.

    2008-01-01

    An internal standard method applicable to undergraduate instrumental analysis or environmental chemistry laboratory has been designed and tested to determine the Henry's law constants for a series of alkyl nitriles. In this method, a mixture of the analytes and an internal standard is prepared and used to make a standard solution (organic solvent)…

  18. Measurement of Henry's Law Constants Using Internal Standards: A Quantitative GC Experiment for the Instrumental Analysis or Environmental Chemistry Laboratory

    ERIC Educational Resources Information Center

    Ji, Chang; Boisvert, Susanne M.; Arida, Ann-Marie C.; Day, Shannon E.

    2008-01-01

    An internal standard method applicable to undergraduate instrumental analysis or environmental chemistry laboratory has been designed and tested to determine the Henry's law constants for a series of alkyl nitriles. In this method, a mixture of the analytes and an internal standard is prepared and used to make a standard solution (organic solvent)…

  19. Temperature dependence of Henry's law constant for hydrogen cyanide. Generation of trace standard gaseous hydrogen cyanide.

    PubMed

    Ma, Jian; Dasgupta, Purnendu K; Blackledge, William; Boss, Gerry R

    2010-04-15

    Primary data for the temperature dependent solubility of HCN in water do not presently exist for low concentrations of HCN at environmentally or physiologically relevant temperatures. Henry's Law constant (K(H), M/atm) for the vapor-solution equilibrium of HCN was determined in 0.1 M sodium phosphate buffer (adjusted to pH 9.00 +/- 0.03 at 296.6 +/- 0.1 K) from 287-311 K. Stable gas phase concentrations of HCN are generated by established techniques, via air equilibration of aqueous cyanide partitioned by a microporous membrane. The effluent gaseous HCN, in equilibrium with the constant temperature aqueous cyanide, was collected in dilute NaOH and determined by a spectrophotometrically using cobinamide. The K(H) of HCN may be expressed as ln K(H) (M/atm) = (8205.7 +/- 341.9)/T - (25.323 +/- 1.144); r(2) = 0.9914) where T is the absolute temperature in K. This corresponds to 9.02 and 3.00 M/atm at 25 and 37.4 degrees C, respectively, compared to actual measurements of 9.86 and 3.22 at 25.0 and 37.8 degrees C, respectively. The technique also allows for convenient generation of trace levels of HCN at ppbv-ppmv levels that can be further diluted.

  20. Effects of temperature, pH, and ionic strength on the Henry's law constant of triethylamine

    NASA Astrophysics Data System (ADS)

    Leng, Chun-Bo; Roberts, Jason E.; Zeng, Guang; Zhang, Yun-Hong; Liu, Yong

    2015-05-01

    The Henry's law constants (KH) of triethylamine (TEA) in pure water and in 1-octanol were measured for the temperatures pertinent to the lower troposphere (278-298 K) using a bubble column system coupled to a Fourier transform infrared spectrometer. The KH values of TEA in water and 1-octanol at 298 K are 5.75 ± 0.86 mol L-1 atm-1 and 115.62 ± 5.78 mol L-1 atm-1. The KH values display strong dependence on temperature, pH, and ionic strength. The characteristic times for TEA to establish an equilibrium between gas and droplet with a size of 5.6 µm are ~33 s (298 K, pH = 5.6); ~8.9 × 102 s (278 K, pH = 5.6); ~1.3 × 103 s (298 K, pH = 4.0); and 3.6 × 104 s (278 K, pH = 4.0). The evaluation of TEA partitioning between gas phase and condensed phase implies that TEA predominantly resides in rainwater, and TEA loss to organic aerosol is negligible.

  1. Optimal experimental designs for estimating Henry's law constants via the method of phase ratio variation.

    PubMed

    Kapelner, Adam; Krieger, Abba; Blanford, William J

    2016-10-14

    When measuring Henry's law constants (kH) using the phase ratio variation (PRV) method via headspace gas chromatography (GC), the value of kH of the compound under investigation is calculated from the ratio of the slope to the intercept of a linear regression of the inverse GC response versus the ratio of gas to liquid volumes of a series of vials drawn from the same parent solution. Thus, an experimenter collects measurements consisting of the independent variable (the gas/liquid volume ratio) and dependent variable (the GC(-1) peak area). A review of the literature found that the common design is a simple uniform spacing of liquid volumes. We present an optimal experimental design which estimates kH with minimum error and provides multiple means for building confidence intervals for such estimates. We illustrate performance improvements of our design with an example measuring the kH for Naphthalene in aqueous solution as well as simulations on previous studies. Our designs are most applicable after a trial run defines the linear GC response and the linear phase ratio to the GC(-1) region (where the PRV method is suitable) after which a practitioner can collect measurements in bulk. The designs can be easily computed using our open source software optDesignSlopeInt, an R package on CRAN.

  2. Reinvestigation of the Henry's law constant for hydrogen peroxide with temperature and acidity variation.

    PubMed

    Huang, Daoming; Chen, Zhongming

    2010-01-01

    Hydrogen peroxide is not only an important oxidant in itself; it also serves as both sink and temporary reservoir for other important oxidants including HOx (OH and HO2) radicals and O3 in the atmosphere. Its partitioning between gas and aqueous phases in the atmosphere, usually described by its Henry's law constant (K(H)), significantly influences its role in atmospheric processes. Large discrepancies between the K(H) values reported in previous work, however, have created uncertainty for atmospheric modelers. Based on our newly developed online instrumentation, we have re-determined the temperature and acidity dependence of K(H) for hydrogen peroxide at an air pressure of (0.960 +/- 0.013) atm (1 atm = 1.01325 x 10(5) Pa). The results indicated that the temperature dependence of K(H) for hydrogen peroxide fits to the Van't Hoff equation form, expressed as lnK(H) = a/T - b, and a = -deltaH/R, where K(H) is in M/atm (M is mol/L), T is in degrees Kelvin, R is the ideal gas constant, and deltaH is the standard heat of solution. For acidity dependence, results demonstrated that the K(H) value of hydrogen peroxide appeared to have no obvious dependence on decreasing pH level (from pH 7 to pH 1). Combining the dependence of both temperature and acidity, the obtained a and b were 7024 +/- 138 and 11.97 +/- 0.48, respectively, deltaH was (58.40 +/- 1.15) kJ/(K x mol), and the uncertainties represent sigma. Our determined K(H) values for hydrogen peroxide will therefore be of great use in atmospheric models.

  3. Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature

    NASA Astrophysics Data System (ADS)

    Cetin, Banu; Ozer, Serdar; Sofuoglu, Aysun; Odabasi, Mustafa

    The Henry's law constant ( H) is an important parameter that is required to estimate the air-water exchange of semi-volatile organic compounds. Henry's law constants for 17 banned/restricted/currently used organochlorine pesticides (OCPs) were experimentally determined using a gas-stripping technique in deionized and saline water (3%) over a temperature range of 5-35 °C. H values (at 25 °C) ranged between 0.066±0.037 Pa m 3 mol -1 (endosulfan II) and 62.0±24.2 Pa m 3 mol -1 (heptachlor) in deionized water while the range in saline water was 0.28±0.03 Pa m 3 mol -1 ( γ-HCH) and 135.2±31.3 Pa m 3 mol -1 (heptachlor). The increase in dimensionless Henry's law constants ( H') for OCPs over the studied temperature range was between 3 ( γ-HCH)-19 times (chlorpyrifos) and 3 (endosulfan II)-80 times ( trans-nonachlor) in deionized and saline water, respectively. The calculated enthalpies of phase change (Δ HH) were within the ranges previously reported for OCPs and other organic compounds (23.8-100.2 kJ mol -1). The salting-out constant, ks, ranged between 0.04 ( γ-HCH) and 1.80 L mol -1 (endosulfan II) indicating the importance of assessing the H values of OCPs in saline water to accurately determine their partitioning and fate in seawater.

  4. Quantitative structure-property relationships for predicting Henry's law constant from molecular structure.

    PubMed

    Dearden, John C; Schüürmann, Gerrit

    2003-08-01

    Various models are available for the prediction of Henry's law constant (H) or the air-water partition coefficient (Kaw), its dimensionless counterpart. Incremental methods are based on structural features such as atom types, bond types, and local structural environments; other regression models employ physicochemical properties, structural descriptors such as connectivity indices, and descriptors reflecting the electronic structure. There are also methods to calculate H from the ratio of vapor pressure (p(v)) and water solubility (S(w)) that in turn can be estimated from molecular structure, and quantum chemical continuum-solvation models to predict H via the solvation-free energy (deltaG(s)). This review is confined to methods that calculate H from molecular structure without experimental information and covers more than 40 methods published in the last 26 years. For a subset of eight incremental methods and four continuum-solvation models, a comparative analysis of their prediction performance is made using a test set of 700 compounds that includes a significant number of more complex and drug-like chemical structures. The results reveal substantial differences in the application range as well as in the prediction capability, a general decrease in prediction performance with decreasing H, and surprisingly large individual prediction errors, which are particularly striking for some quantum chemical schemes. The overall best-performing method appears to be the bond contribution method as implemented in the HENRYWIN software package, yielding a predictive squared correlation coefficient (q2) of 0.87 and a standard error of 1.03 log units for the test set.

  5. Henry's Law and Noisy Knuckles.

    ERIC Educational Resources Information Center

    Kimbrough, Doris R.

    1999-01-01

    Discusses Henry's Law which describes the relationship between the pressure of gas and the concentration of that gas in a solution. Presents an application of Henry's Law to the cracking of knuckles. (CCM)

  6. Henry's Law and Noisy Knuckles.

    ERIC Educational Resources Information Center

    Kimbrough, Doris R.

    1999-01-01

    Discusses Henry's Law which describes the relationship between the pressure of gas and the concentration of that gas in a solution. Presents an application of Henry's Law to the cracking of knuckles. (CCM)

  7. Estimation of Henry's Law Constant for a Diverse Set of Organic Compounds from Molecular Structure

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) vapor pressure and activity coefficient models were coupled to estimate Henry’s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar organic compounds without modification or additional p...

  8. Estimation of Henry's Law Constant for a Diverse Set of Organic Compounds from Molecular Structure

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) vapor pressure and activity coefficient models were coupled to estimate Henry’s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar organic compounds without modification or additional p...

  9. Temperature dependence of the infinite dilution activity coefficient and Henry's law constant of polycyclic aromatic hydrocarbons in water.

    PubMed

    Reza, Joel; Trejo, Arturo

    2004-08-01

    The water solubility of 9,10-dihydroanthracene was experimentally determined between 278.12 and 313.17 K. Determinations were carried out by an experimental procedure developed in our laboratory, which is a modification of the dynamic coupled column liquid chromatographic technique. The uncertainty of the experimental determinations ranged from +/- 0.50% to +/- 3.10%. These data, as well as the water solubility data of other five polycyclic aromatic hydrocarbons (PAHs) previously studied, were used to calculate the temperature dependence of the infinite dilution activity coefficient of 9,10-dihydroanthracene, anthracene, pyrene, 9,10-dihydrophenanthrene, m-terphenyl, and guaiazulene in water. Molar excess enthalpies and entropies at infinite dilution, at 298.15 K, were also derived. The temperature dependence of the infinite dilution activity coefficients was used, together with literature values of the vapor pressures of supercooled liquid PAHs (p(B)(sc)), to estimate their Henry's law constants (HLC). Only HLC for anthracene, pyrene, and 9,10-dihydrophenanthrene were calculated, since no p(B)(sc) data were available in the literature for 9,10-dihydroanthracene, m-terphenyl, and guaiazulene. From the observed temperature dependence of the Henry's law constants the enthalpy and entropy of the phase change from the dissolved phase to the gas phase were also derived for anthracene, pyrene, and 9,10-dihydrophenanthrene.

  10. Determination of Henry`s law constants by equilibrium partitioning in a closed system using a new in situ optical absorbance method

    SciTech Connect

    Allen, J.M.; Balcavage, W.X.; Ramachandran, B.R.; Shrout, A.L.

    1998-07-01

    Currently, a great deal of interest exists in developing quantitative descriptions of the transport behavior for organic chemical compounds in the environment. Transport between water and air is of particular significance in this regard. A new method for measurement of thermodynamic Henry`s law constants (H) is reported. In this method, the optical absorbance of a dilute aqueous solution containing an organic compound is followed with time as the compound partitions into the air above the solution in a sealed vessel. The change in optical absorbance and the vapor to liquid volume ratio of the vessel are then used to calculate the value for H. The concentration of the organic compound in the aqueous and vapor phases need not be known. This method allows the approach to equilibrium to be observed in real time so that attainment of equilibrium is readily apparent. This method works particularly well for water-soluble compounds having low vapor pressures. The applicability of this method is limited to compounds that exhibit significant optical absorbance in the ultraviolet and visible regions of the electromagnetic spectrum. Values for H and their temperature dependencies measured using this new method are reported for methacrolein, methyl vinyl ketone, benzaldehyde, and acetophenone. Values for H are also reported for benzene, toluene, and ethylbenzene at 298 K. All reported H data are compared with previously reported values.

  11. (Methyl)glyoxal in Different Electrolytes: Product Distributions, Optical Properties and Influence on Henry's Law Constant

    NASA Astrophysics Data System (ADS)

    Keutsch, F. N.; Galloway, M. M.; Yu, G.; Bayer, A.; Korshavn, K.

    2010-12-01

    (Methyl)glyoxal in Different Electrolytes: Product Distributions, Optical Properties and Influence on Henry’s Law Constant, Methylglyoxal and glyoxal are produced in the oxidation of many volatile organic compounds (VOCs). They partition strongly into aqueous solutions due to hydration of their aldehyde groups, which is reflected in their large Henry’s law constants. As a result, there have been many recent studies investigating the role of both in secondary organic aerosol formation; it has also been shown that reaction products within aerosol could affect aerosol optical properties. We present laboratory experiments of aerosol mimics using a variety of analytical methods to evaluate: (1) why sulfate increases the Henry’s law constant substantially compared to chloride; (2) the effect of different electrolytes on oligomerization; (3) the identity, mechanism and kinetics of reaction products in ammonium containing solution and; (4) the identity of the light absorbing compounds formed in ammonium containing solutions. We will also discuss whether similar effects of electrolytes on other organic compounds should be expected and implications for ambient aerosol.

  12. Aqueous solubility, Henry's law constants and air/water partition coefficients of n-octane and two halogenated octanes.

    PubMed

    Sarraute, S; Delepine, H; Costa Gomes, M F; Majer, V

    2004-12-01

    New data on the aqueous solubility of n-octane, 1-chlorooctane and 1-bromooctane are reported between 1 degree C and 45 degrees C. Henry's law constants, K(H), and air/water partition coefficients, K(AW), were calculated by associating the measured solubility values to vapor pressures taken from literature. The mole fraction aqueous solubility varies between (1.13-1.60)x10(-7) for n-octane with a minimum at approximately 23 degrees C, (3.99-5.07)x10(-7) for 1-chlorooctane increasing monotonically with temperature and (1.60-3.44)x10(-7) for 1-bromooctane with a minimum near 18 degrees C. The calculated air-water partition coefficients increase with temperature and are two orders of magnitude lower for the halogenated derivatives compared to octane. The precision of the results, taken as the average absolute deviations of the aqueous solubility, the Henry's law constants, or the air/water partition coefficients, from appropriate smoothing equations as a function of temperature is of 3% for n-octane and of 2% and 4% for 1-chlorooctane and 1-bromooctane, respectively. A new apparatus based on the dynamic saturation column method was used for the solubility measurements. Test measurements with n-octane indicated the capability of measuring solubilities between 10(-6) and 10(-10) in mole fraction, with an estimated accuracy better than +/-10%. A thorough thermodynamic analysis of converting measured data to air/water partition coefficients is presented.

  13. Henry's Law and Noisy Knuckles

    NASA Astrophysics Data System (ADS)

    Kimbrough, Doris R.

    1999-11-01

    Henry's law describes the relationship between the pressure of a gas and the concentration of that gas in solution. Presented here is the application of Henry's law to the noise associated with "cracking" knuckles. Gases dissolved in the synovial fluid in joints rapidly come out of solution as the joint is stretched and pressure is decreased. This "cavitation" produces a characteristic noise.

  14. Henry's law constant and overall mass transfer coefficient for formaldehyde emission from small water pools under simulated indoor environmental conditions.

    PubMed

    Liu, Xiaoyu; Guo, Zhishi; Roache, Nancy F; Mocka, Corey A; Allen, Matt R; Mason, Mark A

    2015-02-03

    The Henry's law constant (HLC) and the overall mass transfer coefficient are both important parameters for modeling formaldehyde emissions from aqueous solutions. In this work, the apparent HLCs for formaldehyde aqueous solutions were determined in the concentration range from 0.01% to 1% (w/w) and at different temperatures (23, 40, and 55 °C) by a static headspace extraction method. The aqueous solutions tested included formaldehyde in water, formaldehyde-water with nonionic surfactant Tergitol NP-9, and formaldehyde-water with anionic surfactant sodium dodecyl sulfate. Overall, the measured HLCs ranged from 8.33 × 10(-6) to 1.12 × 10(-4) (gas-concentration/aqueous-concentration, dimensionless). Fourteen small-chamber tests were conducted with formaldehyde solutions in small pools. By applying the measured HLCs, the formaldehyde overall liquid-phase mass transfer coefficients (KOLs) were determined to be in the range of 8.12 × 10(-5) to 2.30 × 10(-4) m/h, and the overall gas-phase mass transfer coefficients were between 2.84 and 13.4 m/h. The influences of the formaldehyde concentration, temperature, agitation rate, and surfactant on HLC and KOL were investigated. This study provides useful data to support source modeling for indoor formaldehyde originating from the use of household products that contain formaldehyde-releasing biocides.

  15. PTR-MS measurements and analysis of models for the calculation of Henry's law constants of monosulfides and disulfides.

    PubMed

    Schuhfried, Erna; Biasioli, Franco; Aprea, Eugenio; Cappellin, Luca; Soukoulis, Christos; Ferrigno, Antonella; Märk, Tilmann D; Gasperi, Flavia

    2011-04-01

    Sulfides are known for their strong odor impact even at very low concentrations. Here, we report Henry's law constants (HLCs) measured at the nanomolar concentration range in water for monosulfides (dimethylsulfide, ethylmethylsulfide, diethylsulfide, allylmethylsulfide) and disulfides (dimethyldisulfide, diethylsulfide, dipropylsulfide) using a dynamic stripping technique coupled to Proton Transfer Reaction-Mass Spectrometry (PTR-MS). The experimental data were compared with literature values and to vapor/solubility calculations and their consistency was confirmed employing the extra-thermodynamic enthalpy-entropy compensation effect. Our experimental data are compatible with reported literature values, and they are typically lower than averaged experimental literature values by about 10%. Critical comparison with other freely available models (modeled vapor/solubility; group and bond additivity methods; Linear Solvation Energy Relationship; SPARC) was performed to validate their applicability to monosulfides and disulfides. Evaluation of theoretical models reveals a large deviation from our measured values by up to four times (in units of Matm(-1)). Two group contribution models were adjusted in view of the new data, and HLCs for a list of sulfur compounds were calculated. Based on our findings we recommend the evaluation and adaption of theoretical models for monosulfides and disulfides to lower values of solubility and higher values of fugacity.

  16. Measuring Uptake Coefficients and Henry's Law Constants of Gas-Phase Species with Models for Secondary Organic Aerosol

    NASA Astrophysics Data System (ADS)

    Fairhurst, M. C.; Waring-Kidd, C.; Ezell, M. J.; Finlayson-Pitts, B. J.

    2014-12-01

    Volatile organic compounds (VOC) are oxidized in the atmosphere and their products contribute to secondary organic aerosol (SOA) formation. These particles have been shown to have effects on visibility, climate, and human health. Current models typically under-predict SOA concentrations from field measurements. Underestimation of these concentrations could be a result of how models treat particle growth. It is often assumed that particles grow via instantaneous thermal equilibrium partitioning between liquid particles and gas-phase species. Recent work has shown that growth may be better represented by irreversible, kinetically limited uptake of gas-phase species onto more viscous, tar-like SOA. However, uptake coefficients for these processes are not known. The goal of this project is to measure uptake coefficients and solubilities for different gases onto models serving as proxies for SOA and determine how they vary based on the chemical composition of the gas and the condensed phase. Experiments were conducted using two approaches: attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and a flow system coupled to a mass spectrometer. The ATR crystal was coated with the SOA proxy and the gas-phase species introduced via a custom flow system. Uptake of the gas-phase species was characterized by measuring the intensity of characteristic IR bands as a function of time, from which a Henry's law constant and initial estimate of uptake coefficients could be obtained. Uptake coefficients were also measured in a flow system where the walls of the flow tube were coated with the SOA proxy and gas-phase species introduced via a moveable inlet. Uptake coefficients were derived from the decay in gas-phase species measured by mass spectrometry. The results of this work will establish a structure-interaction relationship for uptake of gases into SOA that can be implemented into regional and global models.

  17. Determination of the Henry's law constants of low-volatility compounds via the measured air-phase transfer coefficients.

    PubMed

    Chao, Huan-Ping; Lee, Jiunn-Fwu; Chiou, Cary T

    2017-09-01

    Accurate Henry's law constants (H) are unavailable for the majority of organic pollutants, especially those having a low volatility. A novel kinetics-based experimental method is introduced to determine H for a wide range of low-H compounds. The method consists of measuring independently the water-to-air transfer coefficient (KL) and the associated air-phase transfer coefficient (kG) of a low-H chemical (solute) in water when KL ≅ kGH prevails according to the two-film theory. The kG for a solute is obtained via a developed gas-dynamic equation that relates kG to the solute molecular weight and the solute-vapor escaping efficiency (β) through a boundary air layer. The value of β is only a function of the in situ air turbulence level, independent of the chemical species. Thus, the required β for solutes can be estimated from the evaporative rates of pure volatile liquids under the same ambient setting. By relating the estimated kG with the measured KL of a low-H solute, the solute H is established. The H values of 45 low-H chemicals, including many complex pesticides, in the range of ∼10(-7) to ∼10(-3) have thus been determined. The accountability of the method is underscored by the consistency of the measured and credible literature H values for a number of the low-H compounds studied. Copyright © 2017 Elsevier Ltd. All rights reserved.

  18. Determination of temperature dependent Henry's law constants of polychlorinated naphthalenes: Application to air-sea exchange in Izmir Bay, Turkey

    NASA Astrophysics Data System (ADS)

    Odabasi, Mustafa; Adali, Mutlu

    2016-12-01

    The Henry's law constant (H) is a crucial variable to investigate the air-water exchange of persistent organic pollutants. H values for 32 polychlorinated naphthalene (PCN) congeners were measured using an inert gas-stripping technique at five temperatures ranging between 5 and 35 °C. H values in deionized water (at 25 °C) varied between 0.28 ± 0.08 Pa m3 mol-1 (PCN-73) and 18.01 ± 0.69 Pa m3 mol-1 (PCN-42). The agreement between the measured and estimated H values from the octanol-water and octanol-air partition coefficients was good (measured/estimated ratio = 1.00 ± 0.41, average ± SD). The calculated phase change enthalpies (ΔHH) were within the interval previously determined for other several semivolatile organic compounds (42.0-106.4 kJ mol-1). Measured H values, paired atmospheric and aqueous concentrations and meteorological variables were also used to reveal the level and direction of air-sea exchange fluxes of PCNs at the coast of Izmir Bay, Turkey. The net PCN air-sea exchange flux varied from -0.55 (volatilization, PCN-24/14) to 2.05 (deposition, PCN-23) ng m-2 day-1. PCN-19, PCN-24/14, PCN-42, and PCN-33/34/37 were mainly volatilized from seawater while the remaining congeners were mainly deposited. The overall number of the cases showing deposition was higher (67.9%) compared to volatilization (21.4%) and near equilibrium (10.7%).

  19. Determining the Henry's Law constants of THMs in seawater by means of purge-and-trap gas chromatography (PT-GC): the influence of seawater as sample matrix.

    PubMed

    Ruiz-Bevia, Francisco; Fernandez-Torres, Maria J

    2010-01-01

    The influence of seawater salts as salting out agents on the purge-and-trap gas chromatography (PT-GC) determination of trihalomethanes (THMs) was studied. This is particularly important since seawater is chlorinated when used as a cooling agent in coastal nuclear power stations. The chlorination produces unwanted THMs as by-products. A PT-GC apparatus was used to determine the Henry's Law constant of each THM, with seawater as the sample matrix.

  20. Temperature dependence of Henry's law constants and KOA for simple and heteroatom-substituted PAHs by COSMO-RS

    NASA Astrophysics Data System (ADS)

    Parnis, J. Mark; Mackay, Donald; Harner, Tom

    2015-06-01

    Henry's Law constants (H) and octanol-air partition coefficients (KOA) for polycyclic aromatic hydrocarbons (PAHs) and selected nitrogen-, oxygen- and sulfur-containing derivatives have been computed using the COSMO-RS method between -5 and 40 °C in 5 °C intervals. The accuracy of the estimation was assessed by comparison of COSMOtherm values with published experimental temperature-dependence data for these and similar PAHs. COSMOtherm log H estimates with temperature-variation for parent PAHs are shown to have a root-mean-square (RMS) error of 0.38 (PAH), based on available validation data. Estimates of O-, N- and S-substituted derivative log H values are found to have RMS errors of 0.30 at 25 °C. Log KOA estimates with temperature variation from COSMOtherm are shown to be strongly correlated with experimental values for a small set of unsubstituted PAHs, but with a systematic underestimation and associated RMS error of 1.11. Similar RMS error of 1.64 was found for COSMO-RS estimates of a group of critically-evaluated log KOA values at room temperature. Validation demonstrates that COSMOtherm estimates of H and KOA are of sufficient accuracy to be used for property screening and preliminary environmental risk assessment, and perform very well for modeling the influence of temperature on partitioning behavior in the temperature range -5 to 40 °C. Temperature-dependent shifts of up to 2 log units in log H and one log unit for log KOA are predicted for PAH species over the range -5 and 40 °C. Within the family of PAH molecules, COSMO-RS is sufficiently accurate to make it useful as a source of estimates for modeling purposes, following corrections for systematic underestimation of KOA. Average changes in the values for log H and log KOA upon substitution are given for various PAH substituent categories, with the most significant shifts being associated with the ionizing nitro functionality and keto groups.

  1. Practical deviations from Henry`s law for water/air partitioning of volatile organic compounds

    SciTech Connect

    Schabron, J.F.; Rovani, J.F. Jr.

    1997-12-31

    A study was conducted to define parameters relating to the use of a down hole submersible photoionization detector (PID) probe to measure volatile organic compounds (VOCs) in an artificial headspace. The partitioning of toluene and trichloroethylene between water and air was studied as a function of analyte concentration and water temperature. The Henry`s law constant governing this partitioning represents an ideal condition at infinite dilution for a particular temperature. The results show that in practice. this partitioning is far from ideal. Conditions resulting in apparent, practical deviations from Henry`s law include temperature and VOC concentration. Thus, a single value of Henry`s law constant for a particular VOC such as toluene can provide only an approximation of concentration in the field. Detector response in saturated humidity environments as a function of water temperature and analyte concentration was studied also.

  2. 40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... chloride 79-44-7 Dimethyldisulfide 624-92-0 Dimethylformamide 68-12-2 1,1-Dimethylhydrazine 57-14-7... Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1 Acetamide 60-35-5...

  3. 40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... chloride 79-44-7 Dimethyldisulfide 624-92-0 Dimethylformamide 68-12-2 1,1-Dimethylhydrazine 57-14-7... Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1 Acetamide 60-35-5...

  4. 40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... chloride 79-44-7 Dimethyldisulfide 624-92-0 Dimethylformamide 68-12-2 1,1-Dimethylhydrazine 57-14-7... Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1 Acetamide 60-35-5...

  5. Proton-transfer-reaction mass spectrometry (PTR-MS) of carboxylic acids: Determination of Henry's law constants and axillary odour investigations

    NASA Astrophysics Data System (ADS)

    Hartungen, Eugen Von; Wisthaler, Armin; Mikoviny, Tomas; Jaksch, Dagmar; Boscaini, Elena; Dunphy, Patrick J.; Märk, Tilmann D.

    2004-12-01

    Proton-transfer-reaction mass spectrometry (PTR-MS) was used as an analytical tool to measure gas-phase concentrations of short-chain fatty acids. Chemical ionisation of C2C6 carboxylic acids by PTR-MS produced intense protonated molecular ions (with traces of hydrates) along with acylium ion fragments. Gas-phase concentrations were derived using the established method for calculating PTR-MS sensitivity factors. Henry's law constants of carboxylic acids for aqueous solutions at 40 °C were determined. Direct monitoring of volatile fatty acids, known to be associated with secretions from the human axilla, was performed via a specially designed transfer device situated in the axilla. Mass spectral data corresponded with the findings of a sensory assessor.

  6. A Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds with a Bubble Column and a Gas Chromatography Flame Ionization Detector (GC-FID)

    ERIC Educational Resources Information Center

    Lee, Shan-Hu; Mukherjee, Souptik; Brewer, Brittany; Ryan, Raphael; Yu, Huan; Gangoda, Mahinda

    2013-01-01

    An undergraduate laboratory experiment is described to measure Henry's law constants of organic compounds using a bubble column and gas chromatography flame ionization detector (GC-FID). This experiment is designed for upper-division undergraduate laboratory courses and can be implemented in conjunction with physical chemistry, analytical…

  7. A Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds with a Bubble Column and a Gas Chromatography Flame Ionization Detector (GC-FID)

    ERIC Educational Resources Information Center

    Lee, Shan-Hu; Mukherjee, Souptik; Brewer, Brittany; Ryan, Raphael; Yu, Huan; Gangoda, Mahinda

    2013-01-01

    An undergraduate laboratory experiment is described to measure Henry's law constants of organic compounds using a bubble column and gas chromatography flame ionization detector (GC-FID). This experiment is designed for upper-division undergraduate laboratory courses and can be implemented in conjunction with physical chemistry, analytical…

  8. Smog chamber experiments to investigate Henry's law constants of glyoxal using different seed aerosols as well as imidazole formation in the presence of ammonia

    NASA Astrophysics Data System (ADS)

    Jakob, Ronit

    2015-04-01

    Aerosols play an important role in the chemistry and physics of the atmosphere. Hence, they have a direct as well as an indirect impact on the earth's climate. Depending on their formation, one distinguishes between primary and secondary aerosols[1]. Important groups within the secondary aerosols are the secondary organic aerosols (SOAs). In order to improve predictions about these impacts on the earth's climate the existing models need to be optimized, because they still underestimate SOA formation[2]. Glyoxal, the smallest α-dicarbonyl, not only acts as a tracer for SOA formation but also as a direct contributor to SOA. Because glyoxal has such a high vapour pressure, it was common knowledge that it does not take part in gas-particle partitioning and therefore has no impact on direct SOA formation. However, the Henry's law constant for glyoxal is surprisingly high. This has been explained by the hydration of the aldehyde groups, which means that a species with a lower vapour pressure is produced. Therefore the distribution of glyoxal between gas- and particle phase is atmospherically relevant and the direct contribution of glyoxal to SOA can no longer be neglected[3]. Besides this particulate glyoxal is able to undergo heterogeneous chemistry with gaseous ammonia to form imidazoles. This plays an important role for regions with aerosols exhibiting alkaline pH values for example from lifestock or soil dust because imidazoles as nitrogen containing compounds change the optical properties of aerosols[4]. A high salt concentration present in chamber seed aerosols leads to an enhanced glyoxal uptake into the particle. This effect is called "salting-in". The salting effect depends on the composition of the seed aerosol as well as the soluble compound. For very polar compounds, like glyoxal, a "salting-in" is observed[3]. Glyoxal particle formation during a smog chamber campaign at Paul-Scherrer-Institut (PSI) in Switzerland was examined using different seed aerosols

  9. Henry’s Law Constants for 2-Azidoethanamine Hypergols: Estimates From a Density Functional Theory/Polarizable Continuum Model

    DTIC Science & Technology

    2009-05-01

    of ),298( iG corrg are based on the ideal gas law and the calculation of S via a standard method ( McQuarrie , 1999). 6 An issue in the...Amine Azide-Based Hydrazine Alternative Hypergols; ARL-TR-4516; U.S. Army Research Laboratory: Aberdeen Proving Ground, MD, 2008. McQuarrie , D. A

  10. Vapour pressures, aqueous solubility, Henry's law constants and air/water partition coefficients of 1,8-dichlorooctane and 1,8-dibromooctane.

    PubMed

    Sarraute, Sabine; Mokbel, Ilham; Costa Gomes, Margarida F; Majer, Vladimir; Delepine, Hervé; Jose, Jacques

    2006-09-01

    New data on the vapour pressures and aqueous solubility of 1,8-dichlorooctane and 1,8-dibromooctane are reported as a function of temperature between 20 degrees C and 80 degrees C and 1 degrees C and 40 degrees C, respectively. For the vapour pressures, a static method was used during the measurements which have an estimated uncertainty between 3% and 5%. The aqueous solubilities were determined using a dynamic saturation column method and the values are accurate to within +/-10%. 1,8-Dichlorooctane is more volatile than 1,8-dibromooctane in the temperature range covered (p(sat) varies from 3 to 250 Pa and from 0.53 to 62 Pa, respectively) and is also approximately three times more soluble in water (mole fraction solubilities at 25 degrees C of 5.95 x 10(-7) and 1.92 x 10(-7), respectively). A combination of the two sets of data allowed the calculation of the Henry's law constants and the air water partition coefficients. A simple group contribution concept was used to rationalize the data obtained.

  11. Use of experimentally determined Henry's Law and salting-out constants for ethanol in seawater for determination of the saturation state of ethanol in coastal waters.

    PubMed

    Willey, Joan D; Powell, Jacqueline P; Avery, G Brooks; Kieber, Robert J; Mead, Ralph N

    2017-09-01

    The Henry's law constant for ethanol in seawater was experimentally determined to be 221 ± 4 M/atm at 22 °C compared with 247 ± 6 M/atm in pure water. The salting out coefficient for ethanol was 0.13 M(-1). In seawater ln(KH) = -(12.8 ± 0.7) + (5310 ± 197)/T where KH is in M atm(-1) and temperature is in K. This plus the salting out coefficient allow calculation of KH for any estuarine or sea water between 1 and 35 °C. High concentrations of dissolved organic carbon do not affect KH values in fresh or seawater. Nearshore surface waters were usually undersaturated with respect to gas phase ethanol except when air concentrations decreased, whereas surface seawater 40 km from shore was supersaturated. The percent saturation in surface waters is driven primarily by changes in air concentrations because these change quickly (hours) and more extensively than surface water. This study allows calculation of ethanol saturation states from air and surface water concentrations which is a necessary step to define the role of surface oceans in the global biogeochemical cycling of ethanol both now and in the future as use of ethanol biofuel continues to grow. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. Evaluation of the gas stripping technique for calculation of Henry's law constants using the initial slope method for 1,2,4,5-tetrachlorobenzene, pentachlorobenzene, and hexachlorobenzene.

    PubMed

    McPhedran, Kerry N; Seth, Rajesh; Drouillard, Ken G

    2013-06-01

    Henry's law constant (HLC) is an important factor used in environmental risk assessment and fate and transport models to describe mass transfer of chemical between water and air. HLCs and structure-property relationships were assessed for 1,2,4,5-tetrachlorobenzene (TeCB), pentachlorobenzene (PeCB), and hexachlorobenzene (HCB). HLCs were determined using the volatilization rate (kv) of sparged chemical at 25 °C. Despite the assumption that kv should be constant throughout the stripping duration, results indicated that kv decreased over time according to three separate slope regions. Results of ANCOVA indicate that kv is statistically different in the third slope region, which leads to the conclusion that use of the entire stripping data set would lead to biased HLCs. This decrease in kv may be attributed to desorption from sparger surfaces, which has not been considered widely in the literature. Statistical analysis was possible because of the robustness of the current experimental procedure which included numerous replications (15 total spargers) and extensive data points available to discern key slope changes. HLCs determined using the gas stripping technique were 57, 33, and 30 Pa m(3) mol(-1) for 1,2,4,5-TeCB, PeCB, and HCB, respectively. In comparison to literature values, current TeCB and HCB HLCs were within wide reference ranges spanning approximately an order of magnitude for each chemical. PeCB HLC of the current study was two times lower than the lowest reference data. Copyright © 2013 Elsevier Ltd. All rights reserved.

  13. Experimental determination of Henry's law constants of difluoromethane (HFC-32) and the salting-out effects in aqueous salt solutions relevant to seawater

    NASA Astrophysics Data System (ADS)

    Kutsuna, Shuzo

    2017-06-01

    Gas-to-water equilibrium coefficients, KeqS (in M atm-1), of difluoromethane (CH2F2), a hydrofluorocarbon refrigerant (HFC-32), in aqueous salt solutions relevant to seawater were determined over a temperature (T) range from 276 to 313 K and a salinity (S) range up to 51 ‰ by means of an inert-gas stripping method. From the van't Hoff equation, the KeqS value in water, which corresponds to the Henry's law constant (KH), at 298 K was determined to be 0.065 M atm-1. The salinity dependence of KeqS (the salting-out effect), ln(KH/KeqS), did not obey the Sechenov equation but was proportional to S0. 5. Overall, the KeqS(T) value was expressed by ln(KeqS(T)) = -49.71 + (77.70 - 0.134 × S0. 5) × (100/T) + 19.14 × ln(T/100). By using this equation in a lower-tropospheric semi-hemisphere (30-90 °S) of the Advanced Global Atmospheric Gases Experiment (AGAGE) 12-box model, we estimated that 1 to 4 % of the atmospheric burden of CH2F2 resided in the ocean mixed layer and that this percentage was at least 4 % in the winter; dissolution of CH2F2 in the ocean may partially influence estimates of CH2F2 emissions from long-term observational data of atmospheric CH2F2 concentrations.

  14. Experimental determination of Henry's law constant of perfluorooctanoic acid (PFOA) at 298 K by means of an inert-gas stripping method with a helical plate

    NASA Astrophysics Data System (ADS)

    Kutsuna, Shuzo; Hori, Hisao

    The Henry's law constant ( KH) of perfluorooctanoic acid (PFOA, C 7F 15C(O)OH) was determined at 298 K in aqueous sulfuric acid solutions and in aqueous sodium chloride and sulfuric acid mixtures by an inert-gas stripping method in which a helical plate was used to increase the residence time of the gas bubbles in the solutions. The partial pressures of C 7F 15C(O)OH in the purge gas ( PPFOA) were determined by means of Fourier-transform infrared spectroscopy. Time-courses of PPFOA and concentrations of PFOA in the test solutions ( CPFOA) differed from those typically obtained by an inert-gas stripping, indicating both the presence of C 7F 15C(O)OH aggregates, even at low concentrations of C 7F 15C(O)OH in aqueous sulfuric acid solutions, and the adsorption of gaseous C 7F 15C(O)OH on the walls of the experimental apparatus. We derived overall gas-to-water partition coefficients ( KH') by simulating the time-courses of PPFOA and CPFOA simultaneously to optimize parameters of the model relating to the partitioning, the aggregation, and the adsorption. The KH' value for 0.31 mol dm -3 sulfuric acid solutions at 298 K was determined at 3.8 ± 0.1 mol dm -3 atm -1. From the relationship between KH' and the ionic strength of aqueous sulfuric acid solutions, the KH values of C 7F 15C(O)OH at 298 K were determined at 9.9 ± 1.5 mol dm -3 atm -1 for p Ka = 2.8 and 5.0 ± 0.2 mol dm -3 atm -1 for p Ka = 1.3. The p Ka value of 1.3 seems to be most probable among the reported three values for C 7F 15C(O)OH, taking into account dependence of KH' on sulfuric acid concentrations for aqueous sodium chloride and sulfuric acid mixtures. Despite the low p Ka value, the relatively small KH of C 7F 15C(O)OH obtained at 298 K suggests a substantial partitioning of C 7F 15C(O)OH in air in the environment.

  15. Henry's law constants for α-, β-, and γ-hexachlorocyclohexanes (HCHs) as a function of temperature and revised estimates of gas exchange in Arctic regions

    NASA Astrophysics Data System (ADS)

    Sahsuvar, Liz; Helm, Paul A.; Jantunen, Liisa M.; Bidleman, Terry F.

    Henry's law constants (H, Pa m 3 mol -1) were determined for α-, β-, and γ-HCH in deionized water over a temperature range of 5-35°C using bubble stripping (BS) and dynamic head space (DHS) techniques. The BS method was improved from previous work in the same laboratory by adjusting for loss of water from the stripping chamber over the experiment. This correction resulted in H values that were ˜15% lower than those calculated without volume adjustments. Good agreement between the BS and DHS methods was found for α- and γ-HCHs, with an average ratio of BS/DHS values = 0.99. H values at 20°C for α- and γ-HCH were 86-89% of those determined by Jantunen and Bidleman (Chemosphere, Global Change Science 2 (2000) 225), but only 62-69% of the results reported by Kucklick et al. (Marine Chem. 34 (1991) 197). The BS rate of β-HCH was much slower than for the other HCHs and its H was determined only by the DHS method. Enthalpies of water-to-air transfer, Δ Hwa, were 59.3±1.6, 65.1 ± 1.3 and 61.4 ± 3.1 kJ mol -1 for α-, β- and γ-HCH, respectively. A reassessment of air-water gas exchange in the western Arctic Ocean and its regional seas was made, based on measurements in 1992-1994. α-HCH was significantly ( p<0.05) oversaturated (net volatilization) in the south Bering Sea and Beaufort Sea but not significantly different from air-water equilibrium in the Chukchi Sea nor the northern Canada Basin. γ-HCH was significantly undersaturated (net deposition) in all four regions. This differs from previous estimates which indicated oversaturation of α-HCH in the four seas and air-water equilibrium for γ-HCH. β-HCH was oversaturated in the south Bering Sea, undersaturated in the Beaufort Sea and near equilibrium in the Chukchi Sea and northern Canada Basin. Highly accurate H values are required when estimating gas exchange in aquatic systems that are close to air-water equilibrium.

  16. Henry's law constant, octanol-air partition coefficient and supercooled liquid vapor pressure of carbazole as a function of temperature: application to gas/particle partitioning in the atmosphere.

    PubMed

    Odabasi, Mustafa; Cetin, Banu; Sofuoglu, Aysun

    2006-02-01

    The Henry's law constant for carbazole was experimentally determined between 5 and 35 degrees C using a gas-stripping technique. The following equation was obtained for dimensionless Henry's law constant (H') versus temperature (T, K): ln H' = -3982(T,K)(-1) + 1.01. Temperature-dependent octanol-air partition coefficients (KOA) and supercooled liquid vapor pressures (PL,Pa) of carbazole were also determined using the GC retention time method. The temperature dependence of KOA and PL were explained by the following: log KOA = 4076/(T,K) - 5.65, log PL(Pa) = -3948(T,K)(- 1) + 11.48. The gas and particle-phase carbazole concentrations measured previously in Chicago, IL in 1995 was used for gas/particle partitioning modeling. Octanol based absorptive partitioning model consistently underpredicted the gas/particle partition coefficients (Kp) for all sampling periods. However, overall there was a good agreement between the measured Kp and soot-based model predictions.

  17. Recent advances in thermal desorption-gas chromatography-mass spectrometery method to eliminate the matrix effect between air and water samples: application to the accurate determination of Henry's law constant.

    PubMed

    Kim, Yong-Hyun; Kim, Ki-Hyun

    2014-05-16

    Accurate values for the Henry's law constants are essential to describe the environmental dynamics of a solute, but substantial errors are recognized in many reported data due to practical difficulties in measuring solubility and/or vapor pressure. Despite such awareness, validation of experimental approaches has scarcely been made. An experimental approach based on thermal desorption-gas chromatography-mass spectrometery (TD-GC-MS) method was developed to concurrently allow the accurate determination of target compounds from the headspace and aqueous samples in closed equilibrated system. The analysis of six aromatics and eight non-aromatic oxygenates was then carried out in a static headspace mode. An estimation of the potential bias and mass balance (i.e., sum of mass measured individually from gas and liquid phases vs. the mass initially added to the system) demonstrates compound-specific phase dependency so that the best results are obtained by aqueous (less soluble aromatics) and headspace analysis (more soluble non-aromatics). Accordingly, we were able to point to the possible sources of biases in previous studies and provide the best estimates for the Henry's constants (Matm(-1)): benzene (0.17), toluene (0.15), p-xylene (0.13), m-xylene (0.13), o-xylene (0.19), styrene (0.27); propionaldehyde (9.26), butyraldehyde (6.19), isovaleraldehyde (2.14), n-valeraldehyde (3.98), methyl ethyl ketone (10.5), methyl isobutyl ketone (3.93), n-butyl acetate (2.41), and isobutyl alcohol (22.2). Copyright © 2014 Elsevier B.V. All rights reserved.

  18. Applicability of Henry's Law to helium solubility in olivine

    NASA Astrophysics Data System (ADS)

    Jackson, C.; Parman, S. W.; Kelley, S. P.; Cooper, R. F.

    2013-12-01

    Applicability of Henry's Law to helium solubility in olivine We have experimentally determined helium solubility in San Carlos olivine across a range of helium partial pressures (PHe) with the goal of quantifying how noble gases behave during partial melting of peridotite. Helium solubility in olivine correlates linearly with PHe between 55 and 1680 bar. This linear relationship suggests Henry's Law is applicable to helium dissolution into olivine up to 1680 bar PHe, providing a basis for extrapolation of solubility relationships determined at high PHe to natural systems. This is the first demonstration of Henry's Law for helium dissolution into olivine. Averaging all the data of the PHe series yields a Henry's coefficient of 3.8(×3.1)×10-12 mol g-1 bar-1. However, the population of Henry's coefficients shows a positive skew (skewness = 1.17), i.e. the data are skewed to higher values. This skew is reflected in the large standard deviation of the population of Henry's coefficients. Averaging the median values from each experiment yields a lower Henry's coefficient and standard deviation: 3.2(× 2.3)×10-12 mol g-1 bar-1. Combining the presently determined helium Henry's coefficient for olivine with previous determinations of helium Henry's coefficients for basaltic melts (e.g. 1) yields a partition coefficient of ~10-4. This value is similar to previous determinations obtained at higher PHe (2). The applicability of Henry's Law here suggests helium is incorporated onto relatively abundant sites within olivine that are not saturated by 1680 bar PHe or ~5×10-9 mol g-1. Large radius vacancies, i.e. oxygen vacancies, are energetically favorable sites for noble gas dissolution (3). However, oxygen vacancies are not abundant enough in San Carlos olivine to account for this solubility (e.g. 4), suggesting the 3x10-12 mol g-1 bar-1 Henry's coefficient is associated with interstitial dissolution of helium. Helium was dissolved into olivine using an externally heated

  19. Henry's law constants measurements of the nonylphenol isomer 4(3‧,5‧-dimethyl-3‧-heptyl)-phenol, tertiary octylphenol and γ-hexachlorocyclohexane between 278 and 298 K

    NASA Astrophysics Data System (ADS)

    Xie, Zhiyong; Le Calvé, Stéphane; Feigenbrugel, Valérie; Preuß, Thomas G.; Vinken, Ralph; Ebinghaus, Ralf; Ruck, Wolfgang

    2004-09-01

    Henry's Law Constants (HLC, M atm-1) were determined for the diastereomeric mixture of the nonylphenol isomer 4(3‧,5‧-dimethyl-3‧-heptyl)-phenol diastereomers (NP353(+) and NP353(-)), tertiary octylphenol (t-OP) and γ-hexachlorocyclohexane (γ-HCH) in artificial seawater over a temperature range 278-298 K using a dynamic equilibrium system. Trace organic substances present in the gas phase were trapped by tandem XAD-2 cartridges and extracted with a soxhlet extractor. The extracts were derivatived with N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA), and then analyzed with GC-MS in the selective ion mode. At 293 K and in artificial seawater, HLC (M atm-1) were found to be equal to: NP353(+), HLC=(483±169); NP353(-), HLC=(551±193); t-OP, HLC=(400±140); γ-HCH, HLC=(876±307). The obtained data were used to derive the following Van't Hoff expressions: ln HLC (NP353(+))=8.73 (±0.95)×(1000/T) -23.61 (±3.30); ln HLC (NP353(-))=8.61 (±0.91)×(1000/T)-23.08 (±3.18); ln HLC (t-OP)=9.03 (±1.40)×(1000/T)-24.83 (±4.86); ln HLC (γ-HCH)=6.17 (±1.08)×(1000/T)-14.28 (±3.75). The derived enthalpies of solvation for NP353(+), NP353(-), t-OP and γ-HCH are -72.6±7.9, -71.6±7.6, -75.1±11.5 and -51.3±9.0 kJ mol-1, respectively. The HLC measurements of γ-HCH, which was used as reference substance, were in good agreement with literature values and its corresponding derived enthalpy of solvation agrees well to the previous values reported in the literature. A reassessment of the air/water gas exchange based on experimentally derived HLC was made for the nonylphenol (NP) in the Lower Hudson River estuary (New York/New Jersey, USA) that was previously reported by Van Ry. A net atmospheric deposition was calculated for the gas exchange of NP in the Lower Bay (Ffw=0.13), and it nearly reaches the condition of equilibrium in the Upper Bay (Ffw=0.46).

  20. Effects of surfactants and salt on Henry's constant of n-hexane.

    PubMed

    Yang, Chunping; Chen, Fayuan; Luo, Shenglian; Xie, Gengxin; Zeng, Guangming; Fan, Changzheng

    2010-03-15

    n-Hexane biological removal is intrinsically limited by its hydrophobic nature and low bioavailability. The addition of surfactants could enhance the transport of volatile organic compounds (VOCs) and change the gas-liquid equilibrium of VOCs. In this paper, the effects of four surfactants, sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB), tert-octylphenoxypoly-ethoxyethanol (Triton X-100), polyoxyethylene (20) sorbitan monooleate (Tween 80), and sodium nitrate on apparent Henry's constant of n-hexane in surfactant solutions were investigated. The apparent Henry's constants were significantly reduced when surfactants concentrations exceeded their critical micelle concentrations (cmc's). On a cmc basis, the anionic surfactant SDS was found to have the greatest effect on the apparent Henry's constant with CTAB succeeding, then followed by Triton X-100 and Tween 80. However, the apparent Henry's constant of n-hexane decreased even more rapidly when Triton X-100, a nonionic surfactant, was added than when the ionic surfactant of SDS or CTAB was applied under identical mass concentration and other conditions. These results suggest that Triton X-100 have the biggest solubilization of n-hexane among the four surfactants. Sodium nitrate slightly decreased the apparent Henry's constant of n-hexane in surfactant solutions, and could be considered as a cosolvent in the surfactant-(n-hexane) solution. In addition, the relationship between apparent Henry's constant and surfactant concentration was further developed.

  1. On the Henry constant and isosteric heat at zero loading in gas phase adsorption.

    PubMed

    Do, D D; Nicholson, D; Do, H D

    2008-08-01

    The Henry constant and the isosteric heat of adsorption at zero loading are commonly used as indicators of the strength of the affinity of an adsorbate for a solid adsorbent. It is assumed that (i) they are observable in practice, (ii) the Van Hoff's plot of the logarithm of the Henry constant versus the inverse of temperature is always linear and the slope is equal to the heat of adsorption, and (iii) the isosteric heat of adsorption at zero loading is either constant or weakly dependent on temperature. We show in this paper that none of these three points is necessarily correct, first because these variables might not be observable since they are outside the range of measurability; second that the linearity of the Van Hoff plot breaks down at very high temperature, and third that the isosteric heat versus loading is a strong function of temperature. We demonstrate these points using Monte Carlo integration and Monte Carlo simulation of adsorption of various gases on a graphite surface. Another issue concerning the Henry constant is related to the way the adsorption excess is defined. The most commonly used equation is the one that assumes that the void volume is the volume extended all the way to a boundary passing through the centres of the outermost solid atoms. With this definition the Henry constant can become negative at high temperatures. Although adsorption at these temperatures may not be practical because of the very low value of the Henry constant, it is more useful to define the Henry constant in such a way that it is always positive at all temperatures. Here we propose the use of the accessible volume; the volume probed by the adsorbate when it is in nonpositive regions of the potential, to calculate the Henry constant.

  2. A Henry's Law Test for Experimental Partitioning Studies of Iron Meteorites

    NASA Technical Reports Server (NTRS)

    Chabot, N. L.; Campbell, A. J.; Humayun, M.; Agee, C. B.

    2001-01-01

    Low-level doped solid metal/liquid metal experiments analyzed by laser ablation ICP-MS allow Henry's Law to be tested. The results indicate Henry's Law is obeyed and the experimental partition coefficients can be applied to iron meteorites. Additional information is contained in the original extended abstract.

  3. Correlation of Henry's law, virial coefficients for the adsorption of hydrocarbons and chlorofluorocarbons on microporous solids

    SciTech Connect

    Rybolt, T.R.; Olson, D.R. . Dept. of Chemistry)

    1994-03-15

    Correlations were developed and used to calculate gas-solid interaction energy parameters which in turn were used to calculate Henry's law constants for the adsorption of a series of hydrocarbons and chlorofluorocarbons on either a 13X zeolite or a microporous carbon, SuperSorb. The adsorption energetic parameter was correlated with the boiling point, critical constant ratio (critical temperature divided by the square root of the critical pressure), number of carbon atoms, and molecular structure or atomic structure of the adsorbate molecule. These correlations were used to calculate gas-solid interaction energies and, with a selection of the gas-solid interaction potential parameters, were used in an integral expression to calculate the gas-solid virial coefficients. The critical constant ratio was found to provide the best means of predicting the gas-solid interaction energy and the corresponding second gas-solid virial coefficient. This approach could be used to predict the extent adsorption in the Henry's law region using only adsorbate molecular properties where energy correlations have been previously established for a series of adsorbate molecules.

  4. Direct volumetric measurement of gas oversolubility in nanoliquids: beyond Henry's law.

    PubMed

    Pera-Titus, Marc; El-Chahal, Rayan; Rakotovao, Volainiana; Daniel, Cécile; Miachon, Sylvain; Dalmon, Jean-Alain

    2009-08-24

    The properties of condensed matter are strongly affected by confinement and size effects at the nanoscale. Herein, we measured by microvolumetry the increased solubility of H(2) in a series of solvents (CHCl(3), CCl(4), n-hexane, ethanol, and water) when confined in the cavities of mesoporous solids (gamma-alumina, silica, and MCM-41). Gas/liquid solubilities are enhanced by up to 15 times over the corresponding bulk values for nanoliquid sizes smaller than 15 nm as long as gas/liquid interfaces are mesoconfined in a porous network. Although Henry's law constant apparently no longer applies under these confinement, the concentration of dissolved H(2) still increases linearly with increasing pressure in the range 1-5 bar. We discuss the role and main implications of surface excess concentrations at mesoconfined gas/liquid interfaces in enhancing gas solubility.

  5. Henry constant and isosteric heat at zero-loading for gas adsorption in carbon nanotubes.

    PubMed

    Do, D D; Do, H D; Wongkoblap, A; Nicholson, D

    2008-12-28

    The Henry constant and the isosteric heat of adsorption at zero loading in a carbon nanotube bundle are studied with Monte Carlo integration for the adsorption of gases over a range of temperatures. The spacing between nanotubes in a bundle is determined from the minimization of potential energy of interaction between these tubes. We study different tube configurations with bundles of 2, 3, 4 and 7 tubes. Depending on the configuration it is found that the spacing is of between 0.31 to 0.333 nm, and this falls within the range reported in the literature. The Henry constant has been carefully defined so that it will not become negative at high temperatures. This is done with the aid of accessible volume, rather than the usual absolute void volume. We show that linearity of the van't Hoff plot for the Henry constant is not strictly followed. Furthermore the slope of this plot is not equal to the isosteric heat of adsorption at zero loading, which is found to be a strong function of temperature. From the results we find that the Henry constant and the heat of adsorption depend on the tube configuration. In general the adsorption in the cusp interstices is strongest followed by that inside the tube and finally on the outer surface. However for very small tubes adsorption occurs inside the tube first. For molecules with orientation, the behaviour is even more interesting and the shape of the isosteric heat versus temperature depends on the degree of orientation, tube configuration and the domain of adsorption (interstices, inside the tube and on the outer surface).

  6. Determination of Henry's constant, the dissociation constant, and the buffer capacity of the bicarbonate system in ruminal fluid.

    PubMed

    Hille, Katharina T; Hetz, Stefan K; Rosendahl, Julia; Braun, Hannah-Sophie; Pieper, Robert; Stumpff, Friederike

    2016-01-01

    Despite the clinical importance of ruminal acidosis, ruminal buffering continues to be poorly understood. In particular, the constants for the dissociation of H2CO3 and the solubility of CO2 (Henry's constant) have never been stringently determined for ruminal fluid. The pH was measured in parallel directly in the rumen and the reticulum in vivo, and in samples obtained via aspiration from 10 fistulated cows on hay- or concentrate-based diets. The equilibrium constants of the bicarbonate system were measured at 38°C both using the Astrup technique and a newly developed method with titration at 2 levels of partial pressure of CO2 (pCO2; 4.75 and 94.98 kPa), yielding mean values of 0.234 ± 0.005 mmol ∙ L(-1) ∙ kPa(-1) and 6.11 ± 0.02 for Henry's constant and the dissociation constant, respectively (n/n = 31/10). Both reticular pH and the pH of samples measured after removal were more alkalic than those measured in vivo in the rumen (by ΔpH = 0.87 ± 0.04 and 0.26 ± 0.04). The amount of acid or base required to shift the pH of ruminal samples to 6.4 or 5.8 (base excess) differed between the 2 feeding groups. Experimental results are compared with the mathematical predictions of an open 2-buffer Henderson-Hasselbalch equilibrium model. Because pCO2 has pronounced effects on ruminal pH and can decrease rapidly in samples removed from the rumen, introduction of a generally accepted protocol for determining the acid-base status of ruminal fluid with standard levels of pCO2 and measurement of base excess in addition to pH should be considered.

  7. Perturbation theory in the catalytic rate constant of the Henri-Michaelis-Menten enzymatic reaction.

    PubMed

    Bakalis, Evangelos; Kosmas, Marios; Papamichael, Emmanouel M

    2012-11-01

    The Henry-Michaelis-Menten (HMM) mechanism of enzymatic reaction is studied by means of perturbation theory in the reaction rate constant k (2) of product formation. We present analytical solutions that provide the concentrations of the enzyme (E), the substrate (S), as well as those of the enzyme-substrate complex (C), and the product (P) as functions of time. For k (2) small compared to k (-1), we properly describe the entire enzymatic activity from the beginning of the reaction up to longer times without imposing extra conditions on the initial concentrations E ( o ) and S ( o ), which can be comparable or much different.

  8. BUBBLE STRIPPING TO DETERMINE HYDROGEN CONCENTRATIONS IN GROUND WATER: A PRACTICAL APPLICATION OF HENRY'S LAW

    EPA Science Inventory

    The Bubble Stripping Method is a chemical testing method that operates on the principle of Henry's Law. It is useful for determining concentrations of hydrogen in well water, and it is capable of detecting concentrations on the order of nanomoles per liter. The method provides ...

  9. BUBBLE STRIPPING TO DETERMINE HYDROGEN CONCENTRATIONS IN GROUND WATER: A PRACTICAL APPLICATION OF HENRY'S LAW

    EPA Science Inventory

    The Bubble Stripping Method is a chemical testing method that operates on the principle of Henry's Law. It is useful for determining concentrations of hydrogen in well water, and it is capable of detecting concentrations on the order of nanomoles per liter. The method provides ...

  10. Henry`s law solubilities and Setchenow coefficients for biogenic reduced sulfur species obtained from gas-liquid uptake measurements

    SciTech Connect

    De Bruyn, W.J.; Swartz, E.; Hu, J.H.

    1995-04-20

    Biogenically produced reduced sulfur compounds, including dimethylsulfide (DMS, CH{sub 3}SCH{sub 3}), hydrogen sulfide (H{sub 2}S), carbon disulfide (CS{sub 2}), methyl mercaptan (CH{sub 3}SH), and carbonyl sulfide (OCS), are a major source of sulfur in the marine atmosphere. This source is estimated to contribute 25-40% of global sulfur emissions. These species and their oxidation products, dimethyl sulfoxide (DMSO), dimethyl sulfone (DMSO{sub 2}), and methane sulfonic acid (MSA), dominate the production of aerosol and cloud condensation nuclei (CCN) in the clean marine atmosphere. The multiphase chemical processes for these species must be understood in order to study the evolving role of combustion-produced sulfur oxides over the oceans. Using a newly developed bubble column apparatus, a series of aqueous phase uptake studies have been completed for the reduced sulfur species DMS, H{sub 2}S, CS{sub 2}, CH{sub 3}SH, and OCS. Aqueous phase uptake has been studied as a function of temperature (278-298 K), pH (1-14), H{sub 2}O{sub 2} concentration (0-1 M), NaCl concentration (0-5 M), and (NH{sub 4}){sub 2}SO{sub 4} concentration (0-4 M). The Henry`s law coefficients for CH{sub 3}SH and CS{sub 2} were determined for the first time, as were the Setchenow coefficients for all the species studied. 33 refs., 8 figs., 2 tabs.

  11. Computational study of the effect of glyoxal-sulfate clustering on the Henry's law coefficient of glyoxal.

    PubMed

    Kurtén, Theo; Elm, Jonas; Prisle, Nønne L; Mikkelsen, Kurt V; Kampf, Christopher J; Waxman, Eleanor M; Volkamer, Rainer

    2015-05-14

    We have used quantum chemical methods to investigate the molecular mechanism behind the recently reported ( Kampf , C. J. ; Environ. Sci. Technol . 2013 , 47 , 4236 - 4244 ) strong dependence of the Henry's law coefficient of glyoxal (C2O2H2) on the sulfate concentration of the aqueous phase. Although the glyoxal molecule interacts only weakly with sulfate, its hydrated forms (C2O3H4 and C2O4H6) form strong complexes with sulfate, displacing water molecules from the solvation shell and increasing the uptake of glyoxal into sulfate-containing aqueous solutions, including sulfate-containing aerosol particles. This promotes the participation of glyoxal in reactions leading to secondary organic aerosol formation, especially in regions with high sulfate concentrations. We used our computed equilibrium constants for the complexation reactions to assess the magnitude of the Henry's law coefficient enhancement and found it to be in reasonable agreement with experimental results. This indicates that the complexation of glyoxal hydrates with sulfate can explain the observed uptake enhancement.

  12. Aqueous solubility (in the range between 298.15 and 338.15 K), vapor pressures (in the range between 10(-5) and 80 Pa) and Henry's law constant of 1,2,3,4-dibenzanthracene and 1,2,5,6-dibenzanthracene.

    PubMed

    Abou-Naccoul, Ramy; Mokbel, Ilham; Bassil, Georgio; Saab, Joseph; Stephan, Khaled; Jose, Jacques

    2014-01-01

    Aqueous solubility and vapor pressures of 1,2,3,4-dibenzanthracene and 1,2,5,6-dibenzanthracene were determined using dynamic saturation methods. For the two isomers, aqueous solubility is in the range between 10(-10) and 10(-2) in molar fraction corresponding to temperature between 298.15 and 338.15K. Vapor pressures of the pure solutes range from 10(-5) to 80 Pa. Prior to the study of the two dibenzanthracenes and in order to check the experimental procedures, solubility of fluoranthene (between 298 and 338 K) and vapor pressures of phenanthrene and fluoranthene (between 300 and 470 K) were measured. From aqueous solubility data coupled with the vapor pressures of the pure solutes, partition coefficient air-water, KAW, and Henry's constant, KH, of environmental relevance were calculated.

  13. Henry`s law gas-solid chromatography and correlations of virial coefficients for hydrocarbons, chlorofluorocarbons, ethers, and sulfur hexafluoride adsorbed onto carbon

    SciTech Connect

    Rybolt, T.R.; Epperson, M.T.; Weaver, H.W.; Thomas, H.E.; Clare, S.E.; Manning, B.M.; McClung, J.T.

    1995-07-01

    Gas-solid chromatography was used to determine the Henry`s law second gas-solid virial coefficients within the temperature range of 314--615 K for ethane, propane, butane, isobutane, pentane, hexane, heptane, chloromethane, dichloromethane, trichloromethane, tetrachloromethane, trichlorofluoromethane (Freon 11), chlorodifluoromethane (Freon 22), dichlorodifluoromethane (Freon 12), methyl ether, ethyl ether, and sulfur hexafluoride with Carbopack B, a microporous carbon adsorbent. The temperature dependence of the second gas-solid virial coefficients of these adsorbates was used in conjunction with analyses based on a graphical method, a single-surface numeric integration method, a single-surface analytic expression method, and a two-surface analytic expression method to determine the gas-solid interaction energies and other parameters. The interaction energies were correlated with a ratio of the critical temperature divided by the square root of the critical pressure. The four methods were compared in their abilities to successfully calculate second gas-solid virial coefficient values.

  14. Systematic harmonic power laws inter-relating multiple fundamental constants

    NASA Astrophysics Data System (ADS)

    Chakeres, Donald; Buckhanan, Wayne; Andrianarijaona, Vola

    2017-01-01

    Power laws and harmonic systems are ubiquitous in physics. We hypothesize that 2, π, the electron, Bohr radius, Rydberg constant, neutron, fine structure constant, Higgs boson, top quark, kaons, pions, muon, Tau, W, and Z when scaled in a common single unit are all inter-related by systematic harmonic powers laws. This implies that if the power law is known it is possible to derive a fundamental constant's scale in the absence of any direct experimental data of that constant. This is true for the case of the hydrogen constants. We created a power law search engine computer program that randomly generated possible positive or negative powers searching when the product of logical groups of constants equals 1, confirming they are physically valid. For 2, π, and the hydrogen constants the search engine found Planck's constant, Coulomb's energy law, and the kinetic energy law. The product of ratios defined by two constants each was the standard general format. The search engine found systematic resonant power laws based on partial harmonic fraction powers of the neutron for all of the constants with products near 1, within their known experimental precision, when utilized with appropriate hydrogen constants. We conclude that multiple fundamental constants are inter-related within a harmonic power law system.

  15. Analytical Phase Equilibrium Function for Mixtures Obeying Raoult's and Henry's Laws

    NASA Astrophysics Data System (ADS)

    Hayes, Robert

    When a mixture of two substances exists in both the liquid and gas phase at equilibrium, Raoults and Henry's laws (ideal solution and ideal dilute solution approximations) can be used to estimate the gas and liquid mole fractions at the extremes of either very little solute or solvent. By assuming that a cubic polynomial can reasonably approximate the intermediate values to these extremes as a function of mole fraction, the cubic polynomial is solved and presented. A closed form equation approximating the pressure dependence on mole fraction of the constituents is thereby obtained. As a first approximation, this is a very simple and potentially useful means to estimate gas and liquid mole fractions of equilibrium mixtures. Mixtures with an azeotrope require additional attention if this type of approach is to be utilized. This work supported in part by federal Grant NRC-HQ-84-14-G-0059.

  16. Analytical Phase Equilibrium Function for Mixtures Obeying Raoult's and Henry's Laws

    NASA Astrophysics Data System (ADS)

    Hayes, Robert

    When a mixture of two substances exists in both the liquid and gas phase at equilibrium, Raoults and Henry's laws (ideal solution and ideal dilute solution approximations) can be used to estimate the gas and liquid mole fractions at the extremes of either very little solute or solvent. By assuming that a cubic polynomial can reasonably approximate the intermediate values to these extremes as a function of mole fraction, the cubic polynomial is solved and presented. A closed form equation approximating the pressure dependence on mole fraction of the constituents is thereby obtained. As a first approximation, this is a very simple and potentially useful means to estimate gas and liquid mole fractions of equilibrium mixtures. Mixtures with an azeotrope require additional attention if this type of approach is to be utilized. This work paid for under NRC-HQ-84-14-G-0059.

  17. Biodegradation testing of chemicals with high Henry's constants - Separating mass and effective concentration reveals higher rate constants.

    PubMed

    Birch, Heidi; Andersen, Henrik R; Comber, Mike; Mayer, Philipp

    2017-05-01

    During simulation-type biodegradation tests, volatile chemicals will continuously partition between water phase and headspace. This study addressed how (1) this partitioning affects test results and (2) can be accounted for by combining equilibrium partition and dynamic biodegradation models. An aqueous mixture of 9 (semi)volatile chemicals was first generated using passive dosing and then diluted with environmental surface water producing concentrations in the ng/L to μg/L range. After incubation for 2 h to 4 weeks, automated Headspace Solid Phase Microextraction (HS-SPME) was applied directly on the test systems to measure substrate depletion by biodegradation relatively to abiotic controls. HS-SPME was also applied to determine air to water partitioning ratios. Biodegradation rate constants relating to the chemical in the water phase, kwater, were generally a factor 1 to 11 times higher than biodegradation rate constants relating to the total mass of chemical in the test system, ksystem, with one exceptional factor of 72 times for a long chain alkane. True water phase degradation rate constants were found (i) more appropriate for risk assessment than test system rate constants, (ii) to facilitate extrapolation to other air-water systems and (iii) to be better defined input parameters for aquatic exposure and fate models.

  18. Nonlocal conservation laws of the constant astigmatism equation

    NASA Astrophysics Data System (ADS)

    Hlaváč, Adam; Marvan, Michal

    2017-03-01

    For the constant astigmatism equation, we construct a system of nonlocal conservation laws (an abelian covering) closed under the reciprocal transformations. The corresponding potentials are functionally independent modulo a Wronskian type relation.

  19. In-cloud multiphase behaviour of acetone in the troposphere: gas uptake, Henry's law equilibrium and aqueous phase photooxidation.

    PubMed

    Poulain, Laurent; Katrib, Yasmine; Isikli, Estelle; Liu, Yao; Wortham, Henri; Mirabel, Philippe; Le Calvé, Stéphane; Monod, Anne

    2010-09-01

    Acetone is ubiquitous in the troposphere. Several papers have focused in the past on its gas phase reactivity and its impact on tropospheric chemistry. However, acetone is also present in atmospheric water droplets where its behaviour is still relatively unknown. In this work, we present its gas/aqueous phase transfer and its aqueous phase photooxidation. The uptake coefficient of acetone on water droplets was measured between 268 and 281K (γ=0.7 x 10(-2)-1.4 x 10(-2)), using the droplet train technique coupled to a mass spectrometer. The mass accommodation coefficient α (derived from γ) was found in the range (1.0-3.0±0.25) x 10(-2). Henry's law constant of acetone was directly measured between 283 and 298K using a dynamic equilibrium system (H((298K))=(29±5)Matm(-1)), with the Van't Hoff expression lnH(T)=(5100±1100)/T-(13.4±3.9). A recommended value of H was suggested according to comparison with literature. The OH-oxidation of acetone in the aqueous phase was carried out at 298K, under two different pH conditions: at pH=2, and under unbuffered conditions. In both cases, the formation of methylglyoxal, formaldehyde, hydroxyacetone, acetic acid/acetate and formic acid/formate was observed. The formation of small amounts of four hydroperoxides was also detected, and one of them was identified as peroxyacetic acid. A drastic effect of pH was observed on the yields of formaldehyde, one hydroperoxide, and, (to a lesser extent) acetic acid/acetate. Based on the experimental observations, a chemical mechanism of OH-oxidation of acetone in the aqueous phase was proposed and discussed. Atmospheric implications of these findings were finally discussed.

  20. Comparative study of the dynamic gravimetric and pulse chromatographic methods for the determination of Henry constants of adsorption for VOC zeolite systems

    NASA Astrophysics Data System (ADS)

    Nokerman, J.; Canet, X.; Mougin, P.; Limborg-Noetinger, S.; Frère, M.

    2005-09-01

    In this paper, we propose a comparative study between a gravimetric apparatus operating under dynamic conditions and a pulse chromatographic device developed for the determination of Henry constants of adsorption for VOC-zeolite systems. In both cases, we provide a description of the experimental set-up and procedure, as well as a complete report on the treatment of the rough experimental data. The experimental errors are also discussed. The comparison work is based on the study of the adsorption of toluene on a NaY zeolite (Si/Al 2.43) for temperatures ranging from 503 to 623 K. The maximal discrepancy found between the experimental Henry constants was 15.0%. The pulse chromatographic method is only dedicated to high-temperature measurements. For low-temperature experiments, the rough data cannot be treated in an efficient way, and it is not possible to obtain reliable Henry constant values. The dynamic gravimetric method is not temperature limited. It is however time-consuming, especially when low-temperature measurements (not presented in this paper) are concerned. Both methods are complementary if the determination of Henry constants is required in a wide temperature range.

  1. Guidance law based on piecewise constant control for hypersonic gliders

    NASA Astrophysics Data System (ADS)

    Hull, David G.; Seguin, Jean-Marie

    A midcourse guidance law is developed for the descent of a hypersonic glider to a fixed target on the ground. It is based on an optimal piecewise constant control (N intervals) obtained from an approximate physical model (flat earth, exponential atmosphere, parabolic drag polar, etc). The resulting optimal control equations can be integrated either analytically or by quadrature, and the guidance algorithm requires the solution of 2N+1 nonlinear algebraic equations. The guidance law is implemented in a realistic glider simulation, the intercept is achieved, and final velocities within 14 percent of the true values are obtained for the downrange and crossranges considered.

  2. DETERMINATION OF HENRY'S LAW CONSTANTS FOR VOCS IN ROOM TEMPERATURE IONIC LIQUIDS

    EPA Science Inventory

    Ionic liquids (ILs) have been shown to be a newer medium for a wide variety of chemical reactions and are considered as the potential replacements for traditional volatile organic solvents. However, the separation and recovery of organic compounds from ILs has not been systematic...

  3. Uncertain Henry's law constants compromise equilibrium partitioning calculations of atmospheric oxidation products

    NASA Astrophysics Data System (ADS)

    Wang, Chen; Yuan, Tiange; Wood, Stephen A.; Goss, Kai-Uwe; Li, Jingyi; Ying, Qi; Wania, Frank

    2017-06-01

    Gas-particle partitioning governs the distribution, removal, and transport of organic compounds in the atmosphere and the formation of secondary organic aerosol (SOA). The large variety of atmospheric species and their wide range of properties make predicting this partitioning equilibrium challenging. Here we expand on earlier work and predict gas-organic and gas-aqueous phase partitioning coefficients for 3414 atmospherically relevant molecules using COSMOtherm, SPARC Performs Automated Reasoning in Chemistry (SPARC), and poly-parameter linear free-energy relationships. The Master Chemical Mechanism generated the structures by oxidizing primary emitted volatile organic compounds. Predictions for gas-organic phase partitioning coefficients (KWIOM/G) by different methods are on average within 1 order of magnitude of each other, irrespective of the numbers of functional groups, except for predictions by COSMOtherm and SPARC for compounds with more than three functional groups, which have a slightly higher discrepancy. Discrepancies between predictions of gas-aqueous partitioning (KW/G) are much larger and increase with the number of functional groups in the molecule. In particular, COSMOtherm often predicts much lower KW/G for highly functionalized compounds than the other methods. While the quantum-chemistry-based COSMOtherm accounts for the influence of intra-molecular interactions on conformation, highly functionalized molecules likely fall outside of the applicability domain of the other techniques, which at least in part rely on empirical data for calibration. Further analysis suggests that atmospheric phase distribution calculations are sensitive to the partitioning coefficient estimation method, in particular to the estimated value of KW/G. The large uncertainty in KW/G predictions for highly functionalized organic compounds needs to be resolved to improve the quantitative treatment of SOA formation.

  4. HENRY'S LAW CONSTANTS AND MICELLAR PARTITIONING OF VOLATILE ORGANIC COMPOUNDS IN SURFACTANT SOLUTIONS

    EPA Science Inventory

    Partitioning of volatile organic compounds (VOCs) into surfactant micelles affects the apparent vapor-liquid equilibrium of VOCs in surfactant solutions. This partitioning will complicate removal of VOCs from surfactant solutions by standard separation processes. Headspace expe...

  5. Solid phase microextraction method development for measuring Henry's Law constants of formaldehyde in aqueous solutions

    EPA Science Inventory

    Formaldehyde (HCHO) has been of special concern as an indoor air pollutant because of its existence in a wide range of products and its adverse health effects. The air-water partitioning behavior of volatile organic compounds (VOCs) such as formaldehyde is an important process th...

  6. DETERMINATION OF HENRY'S LAW CONSTANTS FOR VOCS IN ROOM TEMPERATURE IONIC LIQUIDS

    EPA Science Inventory

    Ionic liquids (ILs) have been shown to be a newer medium for a wide variety of chemical reactions and are considered as the potential replacements for traditional volatile organic solvents. However, the separation and recovery of organic compounds from ILs has not been systematic...

  7. Solid phase microextraction method development for measuring Henry's Law constants of formaldehyde in aqueous solutions

    EPA Science Inventory

    Formaldehyde (HCHO) has been of special concern as an indoor air pollutant because of its existence in a wide range of products and its adverse health effects. The air-water partitioning behavior of volatile organic compounds (VOCs) such as formaldehyde is an important process th...

  8. HENRY'S LAW CONSTANTS AND MICELLAR PARTITIONING OF VOLATILE ORGANIC COMPOUNDS IN SURFACTANT SOLUTIONS

    EPA Science Inventory

    Partitioning of volatile organic compounds (VOCs) into surfactant micelles affects the apparent vapor-liquid equilibrium of VOCs in surfactant solutions. This partitioning will complicate removal of VOCs from surfactant solutions by standard separation processes. Headspace expe...

  9. Henry Crater

    NASA Image and Video Library

    2002-12-19

    Located in Arabia Terra, the crater shown in this image from NASA Mars Odyssey spacecraft is known as Henry Crater. Like many other craters on Mars, the interior of Henry Crater is filled with a layered deposit.

  10. Steering Law Controlling the Constant Speeds of Control Moment Gyros

    NASA Astrophysics Data System (ADS)

    KOYASAKO, Y.; TAKAHASHI, M.

    2016-09-01

    To enable the agile control of satellites, using control moment gyros (CMGs) has become increasingly necessary because of their ability to generate large amounts of torque. However, CMGs have a singularity problem whereby the torque by the CMGs degenerates from three dimensions to two dimensions, affecting spacecraft attitude control performance. This study proposes a new steering control law for CMGs by controlling the constant speed of a CMG. The proposed method enables agile attitude changes, according to the required task, by managing the total angular momentum of the CMGs by considering the distance to external singularities. In the proposed method, the total angular momentum is biased in a specific direction and the angular momentum envelope is extended. The design method can increase the net angular momentum of CMGs which can be exchanged with the satellite. The effectiveness of the proposed method is demonstrated by numerical simulations.

  11. Partition coefficients for REE between garnets and liquids - Implications of non-Henry's Law behaviour for models of basalt origin and evolution

    NASA Technical Reports Server (NTRS)

    Harrison, W. J.

    1981-01-01

    An experimental investigation of Ce, Sm and Tm rare earth element (REE) partition coefficients between coexisting garnets (both natural and synthetic) and hydrous liquids shows that Henry's Law may not be obeyed over a range of REE concentrations of geological relevance. Systematic differences between the three REE and the two garnet compositions may be explained in terms of the differences between REE ionic radii and those of the dodecahedral site into which they substitute, substantiating the Harrison and Wood (1980) model of altervalent substitution. Model calculations demonstrate that significant variation can occur in the rare earth contents of melts produced from a garnet lherzolite, if Henry's Law partition coefficients do not apply for the garnet phase.

  12. Partition coefficients for REE between garnets and liquids - Implications of non-Henry's Law behaviour for models of basalt origin and evolution

    NASA Technical Reports Server (NTRS)

    Harrison, W. J.

    1981-01-01

    An experimental investigation of Ce, Sm and Tm rare earth element (REE) partition coefficients between coexisting garnets (both natural and synthetic) and hydrous liquids shows that Henry's Law may not be obeyed over a range of REE concentrations of geological relevance. Systematic differences between the three REE and the two garnet compositions may be explained in terms of the differences between REE ionic radii and those of the dodecahedral site into which they substitute, substantiating the Harrison and Wood (1980) model of altervalent substitution. Model calculations demonstrate that significant variation can occur in the rare earth contents of melts produced from a garnet lherzolite, if Henry's Law partition coefficients do not apply for the garnet phase.

  13. Henry's law solubilities and Śetchenow coefficients for biogenic reduced sulfur species obtained from gas-liquid uptake measurements

    NASA Astrophysics Data System (ADS)

    de Bruyn, W. J.; Swartz, E.; Hu, J. H.; Shorter, Jeffrey A.; Davidovits, P.; Worsnop, D. R.; Zahniser, M. S.; Kolb, C. E.

    1995-04-01

    Biogenically produced reduced sulfur compounds, including dimethylsulfide (DMS, CH3SCH3), hydrogen sulfide (H2S), carbon disulfide (CS2), methyl mercaptan (CH3SH), and carbonyl sulfide (OCS), are a major source of sulfur in the marine atmosphere. This source is estimated to contribute 25-40% of global sulfur emissions. These species and their oxidation products, dimethyl sulfoxide (DMSO), dimethyl sulfone (DMSO2), and methane sulfonic acid (MSA), dominate the production of aerosol and cloud condensation nuclei (CCN) in the clean marine atmosphere. The multiphase chemical processes for these species must be understood in order to study the evolving role of combustion-produced sulfur oxides over the oceans. Using a newly developed bubble column apparatus, a series of aqueous phase uptake studies have been completed for the reduced sulfur species DMS, H2S, CS2, CH3SH, and OCS. Aqueous phase uptake has been studied as a function of temperature (278-298 K), pH (1-14), H2O2 concentration (0-1 M), NaCl concentration (0-5 M), and (NH4)2SO4 concentration (0-4 M). The Henry's law coefficients for CH3SH and CS2 were determined for the first time, as were the Setchenow coefficients for all the species studied.

  14. Generation of sub-part-per-billion gaseous volatile organic compounds at ambient temperature by headspace diffusion of aqueous standards through decoupling between ideal and nonideal Henry's law behavior.

    PubMed

    Kim, Yong-Hyun; Kim, Ki-Hyun

    2013-05-21

    In the analysis of volatile organic compounds in air, the preparation of their gaseous standards at low (sub-ppb) concentration levels with high reliability is quite difficult. In this study, a simple dynamic headspace-based approach was evaluated as a means of generating vapor-phase volatile organic compounds from a liquid standard in an impinger at ambient temperature (25 °C). For a given sampling time, volatile organic compound vapor formed in the headspace was swept by bypassing the sweep gas through the impinger and collected four times in quick succession in separate sorbent tubes. In each experiment, a fresh liquid sample was used for each of the four sampling times (5, 10, 20, and 30 min) at a steady flow rate of 50 mL min(-1). The air-water partitioning at the most dynamic (earliest) sweeping stage was established initially in accord with ideal Henry's law, which was then followed by considerably reduced partitioning in a steady-state equilibrium (non-ideal Henry's law). The concentrations of gaseous volatile organic compounds, collected after the steady-state equilibrium, reached fairly constant values: for instance, the mole fraction of toluene measured at a sweeping interval of 10 and 30 min averaged 1.10 and 0.99 nmol mol(-1), respectively (after the initial 10 min sampling). In the second stage of our experiment, the effect of increasing the concentrations of liquid spiking standard was also examined by collecting sweep gas samples from two consecutive 10 min runs. The volatile organic compounds, collected in the first and second 10 min sweep gas samples, exhibited ideal and nonideal Henry's law behavior, respectively. From this observation, we established numerical relationships to predict the mole fraction (or mixing ratio) of each volatile organic compound in steady-state equilibrium in relation to the concentration of standard spiked into the system. This experimental approach can thus be used to produce sub-ppb levels of gaseous volatile organic

  15. HENRY'S LAW CALCULATOR

    EPA Science Inventory

    On-Site was developed to provide modelers and model reviewers with prepackaged tools ("calculators") for performing site assessment calculations. The philosophy behind OnSite is that the convenience of the prepackaged calculators helps provide consistency for simple calculations,...

  16. HENRY'S LAW CALCULATOR

    EPA Science Inventory

    On-Site was developed to provide modelers and model reviewers with prepackaged tools ("calculators") for performing site assessment calculations. The philosophy behind OnSite is that the convenience of the prepackaged calculators helps provide consistency for simple calculations,...

  17. Determination of Henry’s Law Constants Using Internal Standards with Benchmark Values

    EPA Science Inventory

    It is shown that Henry’s law constants can be experimentally determined by comparing headspace content of compounds with known constants to interpolate the constants of other compounds. Studies were conducted over a range of water temperatures to identify temperature dependence....

  18. Determination of Henry’s Law Constants Using Internal Standards with Benchmark Values

    EPA Science Inventory

    It is shown that Henry’s law constants can be experimentally determined by comparing headspace content of compounds with known constants to interpolate the constants of other compounds. Studies were conducted over a range of water temperatures to identify temperature dependence....

  19. Two phenomenological constants explain similarity laws in stably stratified turbulence.

    PubMed

    Katul, Gabriel G; Porporato, Amilcare; Shah, Stimit; Bou-Zeid, Elie

    2014-02-01

    In stably stratified turbulent flows, the mixing efficiency associated with eddy diffusivity for heat, or equivalently the turbulent Prandtl number (Pr(t)), is fraught with complex dynamics originating from the scalewise interplay between shear generation of turbulence and its dissipation by density gradients. A large corpus of data and numerical simulations agree on a near-universal relation between Pr(t) and the Richardson number (R(i)), which encodes the relative importance of buoyancy dissipation to mechanical production of turbulent kinetic energy. The Pr(t)-R(i) relation is shown to be derivable solely from the cospectral budgets for momentum and heat fluxes if a Rotta-like return to isotropy closure for the pressure-strain effects and Kolmogorov's theory for turbulent cascade are invoked. The ratio of the Kolmogorov to the Kolmogorov-Obukhov-Corrsin phenomenological constants, and a constant associated with isotropization of the production whose value (= 3/5) has been predicted from Rapid Distortion Theory, explain all the macroscopic nonlinearities.

  20. Patrick Henry.

    ERIC Educational Resources Information Center

    Scanlon, Thomas M.

    Patrick Henry dominated the politics of Virginia and was a powerful voice in the affairs of the early United States. He became a lawyer at age 23 and rose to prominence following his victory in "The Parsons Case." Soon after, he was elected to the House of Burgesses where he challenged the control of the wealthy, established members and…

  1. Patrick Henry.

    ERIC Educational Resources Information Center

    Scanlon, Thomas M.

    Patrick Henry dominated the politics of Virginia and was a powerful voice in the affairs of the early United States. He became a lawyer at age 23 and rose to prominence following his victory in "The Parsons Case." Soon after, he was elected to the House of Burgesses where he challenged the control of the wealthy, established members and…

  2. Realization of power law inflation & variants via variation of the strong coupling constant

    SciTech Connect

    AlHallak, M.; Chamoun, N.

    2016-09-05

    We present a model of power law inflation generated by variation of the strong coupling constant. We then extend the model to two varying coupling constants which leads to a potential consisting of a linear combination of exponential terms. Some variants of the latter may be self-consistent and can accommodate the experimental data of the Planck 2015 and other recent experiments.

  3. Numerical determination of Paris law constants for carbon steel using a two-scale model

    NASA Astrophysics Data System (ADS)

    Mlikota, M.; Staib, S.; Schmauder, S.; Božić, Ž.

    2017-05-01

    For most engineering alloys, the long fatigue crack growth under a certain stress level can be described by the Paris law. The law provides a correlation between the fatigue crack growth rate (FCGR or da/dN), the range of stress intensity factor (ΔK), and the material constants C and m. A well-established test procedure is typically used to determine the Paris law constants C and m, considering standard specimens, notched and pre-cracked. Definition of all the details necessary to obtain feasible and comparable Paris law constants are covered by standards. However, these cost-expensive tests can be replaced by appropriate numerical calculations. In this respect, this paper deals with the numerical determination of Paris law constants for carbon steel using a two-scale model. A micro-model containing the microstructure of a material is generated using the Finite Element Method (FEM) to calculate the fatigue crack growth rate at a crack tip. The model is based on the Tanaka-Mura equation. On the other side, a macro-model serves for the calculation of the stress intensity factor. The analysis yields a relationship between the crack growth rates and the stress intensity factors for defined crack lengths which is then used to determine the Paris law constants.

  4. 40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...-Acetylaminofluorene 53-96-3 3-Acetyl-5-hydroxypiperidine 3-Acetylpiperidine 618-42-8 1-Acetyl-2-thiourea 591-08-2 Acrylamide 79-06-1 Acrylic acid 79-10-7 Adenine 73-24-5 Adipic acid 124-04-9 Adiponitrile 111-69-3 Alachlor 15972-60-8 Aldicarb 116-06-3 Ametryn 834-12-8 4-Aminobiphenyl 92-67-1 4-Aminopyridine 504-24-5...

  5. 40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...-Acetylaminofluorene 53-96-3 3-Acetyl-5-hydroxypiperidine 3-Acetylpiperidine 618-42-8 1-Acetyl-2-thiourea 591-08-2 Acrylamide 79-06-1 Acrylic acid 79-10-7 Adenine 73-24-5 Adipic acid 124-04-9 Adiponitrile 111-69-3 Alachlor 15972-60-8 Aldicarb 116-06-3 Ametryn 834-12-8 4-Aminobiphenyl 92-67-1 4-Aminopyridine 504-24-5...

  6. Henry Crater

    NASA Technical Reports Server (NTRS)

    2002-01-01

    [figure removed for brevity, see original site]

    Located in Arabia Terra, the crater shown here is known as Henry Crater. Like many other craters on Mars, the interior of Henry Crater is filled with a layered deposit. These materials were brought into the crater sometime after the impact formed the crater. The fine scale of layering can be seen in the right- center portion of the image.

    Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

    NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

  7. (t, i, f)-Physical Laws and (t, i, f)-Physical Constants

    NASA Astrophysics Data System (ADS)

    Smarandache, Florentin

    2016-05-01

    In our reality, we do not have perfect spaces and perfect systems. Therefore many physical laws function approximatively. Also, the physical constants are not universal too. Variations of their values depend from a space to another, from a system to another, from a time to another, and so on depending on many parameters. The physical laws and similarly the physical constants are t% true, i% indeterminate, and f% false in a given space with a certain composition, and it has a different neutrosophical truth value in another space with another composition. That's why, instead of universal (1, 0, 0)-physical laws and universal (1, 0, 0)-physical constants, we have (t, i, f)-physical laws and respectively (t, i, f)-physical constants, meaning partially true, partially indeterminate, and partially false in each space. Therefore, one uses the neutrosophic logic, which is a general framework for unification of many existing logics, and its components t (truth), i (indeterminacy), f (falsehood) are standard or non-standard real subsets of ]- 0, 1+ [ with not necessarily any connection between them. It has many applications in physics.

  8. UAS stealth: target pursuit at constant distance using a bio-inspired motion camouflage guidance law.

    PubMed

    Strydom, Reuben; Srinivasan, Mandyam V

    2017-09-21

    The aim of this study is to derive a guidance law by which an unmanned aerial system(s) (UAS) can pursue a moving target at a constant distance, while concealing its own motion. We derive a closed-form solution for the trajectory of the UAS by imposing two key constraints: (1) the shadower moves in such a way as to be perceived as a stationary object by the shadowee, and (2) the distance between the shadower and shadowee is kept constant. Additionally, the theory presented in this paper considers constraints on the maximum achievable speed and acceleration of the shadower. Our theory is tested through Matlab simulations, which validate the camouflage strategy for both 2D and 3D conditions. Furthermore, experiments using a realistic vision-based implementation are conducted in a virtual environment, where the results demonstrate that even with noisy state information it is possible to remain well camouflaged using the constant distance motion camouflage technique.

  9. A simple van't Hoff law for calculating Langmuir constants in clathrate hydrates

    NASA Astrophysics Data System (ADS)

    Lakhlifi, Azzedine; Dahoo, Pierre Richard; Picaud, Sylvain; Mousis, Olivier

    2015-02-01

    This work gives a van't Hoff law expression of Langmuir constants of different species for determining their occupancy in clathrate hydrates. First, a pairwise site-site interaction potential energy model is used to calculate the Langmuir constants in an otherwise anisotropic potential environment, as a function of temperature. The results are then fitted to a van't Hoff law expression to give a set of parameters that can be used for calculating clathrates compositions. The van't Hoff law's parameters are given for eighteen gas species trapped in the small and large cavities of structure types I and II. The accuracy of this approach is based on a detailed comparison with available experimental and/or previously calculated data for ethane, cyclo-propane, methane and carbon dioxide clathrate hydrates. A comparison with the analytical cell method is also carried out to better understand the importance of asymmetry and possible limitations of the van't Hoff temperature dependence.

  10. Quantum-statistical equilibrium and the ``law'' of constant Fermi potential

    NASA Astrophysics Data System (ADS)

    Le Coz, Yannick L.

    2003-02-01

    We apply the general quantum-statistical density-matrix formalism to an independent-electron gas within a space-dependent external electric potential, under equilibrium conditions. This problem is analogous to an ideal semiconductor homojunction diode. We solve the resulting equilibrium density-matrix equation using a perturbation theory. Next, we derive a first-order quantum correction to the classical Maxwell-Boltzmann density-potential formula. The correction appears as an added curvature term in external potential. It represents expected quantum-mechanical scattering against a spatially varying potential. Our results indicate that the commonly encountered thermodynamic or statistical-mechanical "law" of constant, equilibrium Fermi potential—with Fermi potential a parameter in the Maxwell-Boltzmann density-potential formula—is not fundamentally exact. In a general space-dependent potential, this "law," we prove, is simply a classical approximation.

  11. A Simple Method to Calculate the Temperature Dependence of the Gibbs Energy and Chemical Equilibrium Constants

    ERIC Educational Resources Information Center

    Vargas, Francisco M.

    2014-01-01

    The temperature dependence of the Gibbs energy and important quantities such as Henry's law constants, activity coefficients, and chemical equilibrium constants is usually calculated by using the Gibbs-Helmholtz equation. Although, this is a well-known approach and traditionally covered as part of any physical chemistry course, the required…

  12. A Simple Method to Calculate the Temperature Dependence of the Gibbs Energy and Chemical Equilibrium Constants

    ERIC Educational Resources Information Center

    Vargas, Francisco M.

    2014-01-01

    The temperature dependence of the Gibbs energy and important quantities such as Henry's law constants, activity coefficients, and chemical equilibrium constants is usually calculated by using the Gibbs-Helmholtz equation. Although, this is a well-known approach and traditionally covered as part of any physical chemistry course, the required…

  13. Joseph Henry and the Telegraph

    NASA Astrophysics Data System (ADS)

    Hochfelder, David

    1997-04-01

    Morse's telegraph rested upon three scientific advances which occured between 1800 and 1830: the development of battery technology, the formulation of laws governing the behavior of electrical components in circuits, and the discovery of electromagnetic phenomena. Joseph Henry was crucial to the development of the early telegraph. His work on electromagnetism made it possible for the electric current to manifest itself as useful mechanical work. Henry developed electromagnets of sufficient lifting power, but which drew relatively small currents; these magnets were the heart of Morse's telegraph receiver. Morse also used electromagnets as relays, which allowed him to transmit signals over great distances. Morse often acknowledged his debt to Henry, and the two enjoyed a cordial working relationship until the mid-1840s. But during the bitter and protracted litigation over Morse's patent, Henry testified (unwillingly, he claimed) against the inventor. This began a lifelong quarrel between the two men, the specifics of which were tedious and petty. In general terms, however, their conflict arose over different notions regarding scientific discovery and technological innovation.

  14. A Unified Kinetics and Equilibrium Experiment: Rate Law, Activation Energy, and Equilibrium Constant for the Dissociation of Ferroin

    ERIC Educational Resources Information Center

    Sattar, Simeen

    2011-01-01

    Tris(1,10-phenanthroline)iron(II) is the basis of a suite of four experiments spanning 5 weeks. Students determine the rate law, activation energy, and equilibrium constant for the dissociation of the complex ion in acid solution and base dissociation constant for phenanthroline. The focus on one chemical system simplifies a daunting set of…

  15. A Unified Kinetics and Equilibrium Experiment: Rate Law, Activation Energy, and Equilibrium Constant for the Dissociation of Ferroin

    ERIC Educational Resources Information Center

    Sattar, Simeen

    2011-01-01

    Tris(1,10-phenanthroline)iron(II) is the basis of a suite of four experiments spanning 5 weeks. Students determine the rate law, activation energy, and equilibrium constant for the dissociation of the complex ion in acid solution and base dissociation constant for phenanthroline. The focus on one chemical system simplifies a daunting set of…

  16. Ensemble of LIF neurons with random membrane decay constant: emergence of power-law behavior in ISI distribution.

    PubMed

    Karmeshu; Sharma, Sudheer Kumar

    2014-09-01

    A theoretical framework is proposed to explain the emergence of power law behavior in the spiking neurons where the membrane decay constant is assumed to vary randomly across the population of neurons. The proposed approach, akin to superstatistics, provides a plausible mechanism for generating power law behavior in non-equilibrium systems with fluctuations in intensive quantity. This approach has led to formulation of a hypothesis that power law behavior in inter-spike interval (ISI) distribution results when several neurons group together and fire together. In presence of fluctuations in membrane decay constant governed by gamma distribution, the asymptotic analysis of ISI distribution yields a power law. This finding has been corroborated by simulation study when different types of probability distributions for membrane decay constant are considered. Our results are in agreement with the empirical findings due to Kim (2004) where the spiking trains of Suprachiasmatic nucleus (SCN) neurons display power law behavior. Further investigations in subthreshold regime reveals that the averaging of the membrane potential over a large number of neurons also yields power law.

  17. John Henry: Then and Now.

    ERIC Educational Resources Information Center

    Nikola-Lisa, W.

    1998-01-01

    Compares three children's books retelling the legend of John Henry: "John Henry: An American Legend" by Ezra Jack Keats (1965), "John Henry" by Julius Lester (1994), and "The Legend of John Henry" by Terry Small (1994). Differences in imagery, language, symbolism, and themes are discussed. (MAK)

  18. John Henry: Then and Now.

    ERIC Educational Resources Information Center

    Nikola-Lisa, W.

    1998-01-01

    Compares three children's books retelling the legend of John Henry: "John Henry: An American Legend" by Ezra Jack Keats (1965), "John Henry" by Julius Lester (1994), and "The Legend of John Henry" by Terry Small (1994). Differences in imagery, language, symbolism, and themes are discussed. (MAK)

  19. Henry Ford Health Systems

    Cancer.gov

    Henry Ford Health Systems evolved from a hospital into a system delivering care to 2.5 million patients and includes the Cancer Epidemiology, Prevention and Control Program, which focuses on epidemiologic and public health aspects of cancer.

  20. Evaluation and Prediction of Henry’s Law Constants and Aqueous Solubilities for Solvents and Hydrocarbon Fuel Components. Volume 1. Technical Discussion

    DTIC Science & Technology

    1987-09-01

    Physical Chemistry, vol, 64, pp, 1643-1648, 1960. 49. Prausnitz, J. M., E. Azevedo and R. Litchenthaler, Molecular Thermodynamics of Fluid-Phase E ,uilibri 2nd edition, Prentice-Hall, New York, 1986, I•8 "’•86 N1

  1. QSPR Modeling of Partition Coefficients and Henry's Law Constants for 75 Chloronaphthalene Congeners by Means of Six Chemometric Approaches-A Comparative Study

    NASA Astrophysics Data System (ADS)

    Puzyn, Tomasz; Falandysz, Jerzy

    2007-03-01

    n-octanol/water and n-octanol/air partition coefficients were calculated for 75 chloronaphthalenes (CNs) by means of quantitative structure-property relationship (QSPR) strategy to fill significant lacks in the empirical data. The QSPR models based on quantum-chemical descriptors computed on the level of density functional theory using B3LYP functional and 6-311++G** basis set. For each property, six models were identified using chemometric approaches such as: multiple regression method, principal component regression, partial least square regression, partial least square regression with initial elimination of the uninformative variables, partial least square regression with variable selection by a genetic algorithm (GA-PLS), and neural networks with variable selection by a genetic algorithm (GA-NN). They were calibrated and validated using the experimentally measured values of logKOW available for 16 congeners and the values of logKOA existing for 43 congeners. The models were compared regarding to their complexity and prediction ability. For best predictive model logKOW values of 75 CNs varied from 3.93 to 6.68, while that of logKOA, from 5.93 to 11.64. Root mean square errors of prediction for the best (GA-NN) models were 0.065 and 0.091, respectively. Further, values of logKAW and KH of CNs were calculated based on predicted logKOW and logKOA data. Depending on the CN congener logKAW varied from -1.68 to -5.21 and that of KH from 0.02 to 51.24. The errors of partitioning data computed in this study were of the same order of magnitude as reported for experimentally derived partitioning data, which confirmed applicability of the proposed modeling scheme for successful determination of logKOW and KOA. Accordingly, a new procedure of the computational partitioning data generation based on partial least square regression with variable selection by a genetic algorithm (GA-PLS) and neural networks with variable selection by a genetic algorithm (GA-NN) was optimized and proposed for future use.

  2. Determination of saltiness from the laws of thermodynamics--estimating the gas constant from psychophysical experiments.

    PubMed

    Norwich, K H

    2001-10-01

    One can relate the saltiness of a solution of a given substance to the concentration of the solution by means of one of the well-known psychophysical laws. One can also compare the saltiness of solutions of different solutes which have the same concentration, since different substances are intrinsically more salty or less salty. We develop here an equation that relates saltiness both to the concentration of the substance (psychophysical) and to a distinguishing physical property of the salt (intrinsic). For a fixed standard molar entropy of the salt being tasted, the equation simplifies to Fechner's law. When one allows for the intrinsic 'noise' in the chemoreceptor, the equation generalizes to include Stevens's law, with corresponding decrease in the threshold for taste. This threshold reduction exemplifies the principle of stochastic resonance. The theory is validated with reference to experimental data.

  3. Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry Hudson Bridge, Inwood Hill Park, Manhattan skyline, and George Washington Bridge in background, looking southwest. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  4. Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry Hudson Bridge, Inwood Hill Park, Manhattan skyline, George Washington Bridge, Hudson River, and Palisades Interstate Park in background, looking south. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  5. One-loop omega-potential of quantum fields with ellipsoid constant-energy surface dispersion law

    SciTech Connect

    Kazinski, P.O.; Shipulya, M.A.

    2011-10-15

    Rapidly convergent expansions of a one-loop contribution to the partition function of quantum fields with ellipsoid constant-energy surface dispersion law are derived. The omega-potential is naturally decomposed into three parts: the quasiclassical contribution, the contribution from the branch cut of the dispersion law, and the oscillating part. The low- and high-temperature expansions of the quasiclassical part are obtained. An explicit expression and a relation of the contribution from the cut with the Casimir term and vacuum energy are established. The oscillating part is represented in the form of the Chowla-Selberg expansion of the Epstein zeta function. Various resummations of this expansion are considered. The general procedure developed is then applied to two models: massless particles in a box both at zero and nonzero chemical potential, and electrons in a thin metal film. Rapidly convergent expansions of the partition function and average particle number are obtained for these models. In particular, the oscillations of the chemical potential of conduction electrons in graphene and a thin metal film due to a variation of size of the crystal are described. - Highlights: > We study quantum fields with ellipsoid constant-energy surface dispersion law. > Rapidly convergent expansions of the omega-potential are derived. > Various resummations of the Chowla-Selberg expansion are obtained. > We establish a relation of the Casimir term with the vacuum energy. > Oscillations of the chemical potential of electrons in graphene are described.

  6. The Doubling Theory Corrects the Titius-Bode Law and Defines the Fine Structure Constant in the Solar System

    NASA Astrophysics Data System (ADS)

    Garnier-Malet, Jean-Pierre

    2006-06-01

    The fundamental movement of the ``doubling theory'', developed in our preceding papers, is applied as a model of the dynamics of the solar system. It is shown that this model justifies and corrects the distances of the planets given by the Titius-Bode law, and predicts new planets between the Kuiper Belt and the Oort Cloud. Indeed, the empirical Titius-Bode law defines in an approximate way the distances of the planets to the sun, and becomes totally false for the most distant planets (Neptune and Pluto) and does not include the Oort Cloud and Kuiper Belt. The doubling theory is based on successive embedded finite structures of space-time domain at different scale levels. The cycle of the doubling movement in the solar system corresponds to 25920 years. It is shown that this cycle defines the fine structure constant.

  7. The Henry Problem Revisited

    NASA Astrophysics Data System (ADS)

    Karasaki, K.; Oldenburg, C. M.; Maekawa, K.

    2006-12-01

    We have modeled laboratory experiments of saltwater intrusion in a configuration resembling the so-called Henry Problem using TOUGH2/EOS7. The experiment differs from the Henry Problem in that the freshwater boundary condition is that of Dirichlet, a difference that is not expected to affect the overall results very much. The simulation matched the saltwater wedge profile of the experiment, the main feature of which was the sharp interface (lack of dispersion) between the freshwater and saltwater. Prior solutions of the Henry Problem show a wide transition zone between freshwater and saltwater arising from the use of a large dispersion coefficient. Henry attributed the large dispersion to the effect of tidally induced motion. In our simulation, we imposed a time-varying sinusoidal boundary condition to see if a larger transition zone can be created without using a larger dispersion coefficient. However, for the parameters used we were not able to do so. It is still plausible that the wide transition zone observed at Biscayne Bay (and as modeled in the Henry Problem) is caused by a particular formation heterogeneity and transient effects. Our analysis, based on a laboratory experiment and accompanying modeling, suggests that dispersion is quite limited. Nonetheless, we question the validity of the use of a large dispersion coefficient where the groundwater velocity is very low, or where the flow is in the opposite direction of the concentration gradient. This work was supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231

  8. Black holes and Boyle's law — The thermodynamics of the cosmological constant

    NASA Astrophysics Data System (ADS)

    Dolan, Brian P.

    2015-02-01

    When the cosmological constant, Λ, is interpreted as a thermodynamic variable in the study of black hole thermodynamics a very rich structure emerges. It is natural to interpret Λ as a pressure and define the thermodynamically conjugate variable to be the thermodynamic volume of the black hole (which need not bear any relation to the geometric volume). Recent progress in this new direction for black hole thermodynamics is reviewed.

  9. Heterogeneous 'proportionality constants' - A challenge to Taylor's Power Law for temporal fluctuations in abundance.

    PubMed

    Kiflawi, Moshe; Mann, Ofri; Meekan, Mark G

    2016-10-21

    Taylor's Power Law for the temporal fluctuation in population size (TL) posits that the variance in abundance scales according to aM(b); where M is the mean abundance and a and b are the 'proportionality' and 'scaling' coefficients. As one of the few empirical rules in population ecology, TL has attracted substantial theoretical and empirical attention. Much of this attention focused on the scaling coefficient; particularly its ubiquitous deviation from the null value of 2. Here we present a line of reasoning that challenges the power-law interpretation of the empirical log-linear relationship between the mean and variance of population size. At the core of our reasoning is the proposition that populations vary not only with respect to M but also with respect to a; which leaves the log-linear relationship intact but forfeits its power-law interpretation. Using the stochastic logistic-growth model as an example, we show that ignoring among-population variation in a is akin to ignoring the variation in the intrinsic rate of growth (r). Accordingly, we show that the slope of the log-linear relationship (b) is a function of the among-population (co)variation in r and the carrying-capacity. We further demonstrate that local environmental stochasticity is sufficient to generate the full range of observed values of b, and that b can in fact be insensitive to substantial differences in the balance between variance-generating and stabilizing processes. Copyright © 2016 Elsevier Ltd. All rights reserved.

  10. Beer Law Constants and Vapor Pressures of HgI2 over HgI2(s,l)

    NASA Technical Reports Server (NTRS)

    Su, Ching-Hua; Zhu, Shen; Ramachandran, N.; Burger, A.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The optical absorption spectra of the vapor phase over HgI2(s,l) were measured for wavelengths between 200 and 600 nm. The spectra show that the sample sublimed congruently into HgI2 with no Hg or I2 absorption spectrum observed. The Beer's Law constants for 15 wavelengths between 200 and 440 nm were determined. From these constants the vapor pressure of H912, P, was established as a function of temperatures for the liquid and the solid Beta-phases. The expressions correspond to the enthalpies of vaporization and sublimation of 15.30 and 20.17 Kcal/mole, respectively, for the liquid and the Beta-phase HgI2. The difference in the enthalpies gives an enthalpy of fusion of 4.87 Kcal/mole and the intersection of the two expressions gives a melting point of 537 K.

  11. Beer Law Constants and Vapor Pressures of HgI2 over HgI2(s,l)

    NASA Technical Reports Server (NTRS)

    Su, Ching-Hua; Zhu, Shen; Ramachandran, N.; Burger, A.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The optical absorption spectra of the vapor phase over HgI2(s,l) were measured for wavelengths between 200 and 600 nm. The spectra show that the sample sublimed congruently into HgI2 with no Hg or I2 absorption spectrum observed. The Beer's Law constants for 15 wavelengths between 200 and 440 nm were determined. From these constants the vapor pressure of H912, P, was established as a function of temperatures for the liquid and the solid Beta-phases. The expressions correspond to the enthalpies of vaporization and sublimation of 15.30 and 20.17 Kcal/mole, respectively, for the liquid and the Beta-phase HgI2. The difference in the enthalpies gives an enthalpy of fusion of 4.87 Kcal/mole and the intersection of the two expressions gives a melting point of 537 K.

  12. Boy Scouts for Henry.

    PubMed

    Allen, Richard E

    2006-01-01

    "Can we do anything for you?" The question was embarrassing. Henry had been poked and prodded and preserved far beyond his wishes. In a medical system that scorns comfort care, a resident physician is troubled by the case of an elderly man with poor quality of life. An awkward attempt at a Boy Scout service project emphasizes how poorly we comfort the terminally ill despite modern technology and interventionalism.

  13. Beer Law Constants and Vapor Pressures of HgI2 over HgI2(s,l)

    NASA Technical Reports Server (NTRS)

    Su, Ching-Hua; Zhu, Shen; Ramachandran, N.; Burger, A.

    2002-01-01

    Optical absorption spectra of the vapor phase over HgI2(s,l) were measured at sample temperatures between 349 and 610 K for wavelengths between 200 and 600 nm. The spectra show the samples sublimed congruently into HGI2 without any observed Hg or I2 absorption spectra. The Beer's Law constants for 15 wavelengths between 200 and 440 nm were derived. From these constants the vapor pressure of HgI2, P, was found to be a function of temperature for the liquid and the solid beta-phases: ln P(atm) = -7700/T(K) + 12.462 (liquid phase) and ln P(atm) = -10150/T(K) + 17.026 (beta-phase). The expressions match the enthalpies of vaporization and sublimation of 15.30 and 20.17 kcal/mole respectively, for the liquid and the beta-phase HgI2. The difference in the enthalpies gives an enthalpy of fusion of 4.87 kcal/mole, and the intersection of the two expressions gives a melting point of 537 K.

  14. Temperature Dependence of Henry’s Law Constant for Hydrogen Cyanide. Generation of Trace Standard Gaseous Hydrogen Cyanide

    PubMed Central

    Ma, Jian; Blackledge, William; Boss, Gerry R.

    2010-01-01

    Primary data for the temperature dependent solubility of HCN in water do not presently exist for low concentrations of HCN at environmentally or physiologically relevant temperatures. Henry’s Law constant (KH, M/atm) for the vapor-solution equilibrium of HCN was determined in 0.1 M sodium phosphate buffer (adjusted to pH 9.00±0.03 at 296.6±0.1 K) from 287–311 K. Stable gas phase concentrations of HCN are generated by established techniques, via air equilibration of aqueous cyanide partitioned by a microporous membrane. The effluent gaseous HCN, in equilibrium with the constant temperature aqueous cyanide, was collected in dilute NaOH and determined by a spectrophotometrically using cobinamide. The KH of HCN may be expressed as ln KH (M/atm) = (8205.7±341.9)/T − (25.323±1.144); r2 = 0.9914) where T is the absolute temperature in K. This corresponds to 9.02 and 3.00 M/atm at 25 and 37.4 °C, respectively, compared to actual measurements of 9.86 and 3.22 at 25.0 and 37.8 °C, respectively. The technique also allows for convenient generation of trace levels of HCN at ppbv-ppmv levels that can be further diluted. PMID:20302333

  15. Beer Law Constants and Vapor Pressures of HgI2 over HgI2(s,l)

    NASA Technical Reports Server (NTRS)

    Su, Ching-Hua; Zhu, Shen; Ramachandran, N.; Burger, A.

    2002-01-01

    Optical absorption spectra of the vapor phase over HgI2(s,l) were measured at sample temperatures between 349 and 610 K for wavelengths between 200 and 600 nm. The spectra show the samples sublimed congruently into HGI2 without any observed Hg or I2 absorption spectra. The Beer's Law constants for 15 wavelengths between 200 and 440 nm were derived. From these constants the vapor pressure of HgI2, P, was found to be a function of temperature for the liquid and the solid beta-phases: ln P(atm) = -7700/T(K) + 12.462 (liquid phase) and ln P(atm) = -10150/T(K) + 17.026 (beta-phase). The expressions match the enthalpies of vaporization and sublimation of 15.30 and 20.17 kcal/mole respectively, for the liquid and the beta-phase HgI2. The difference in the enthalpies gives an enthalpy of fusion of 4.87 kcal/mole, and the intersection of the two expressions gives a melting point of 537 K.

  16. Henry Gray, plagiarist.

    PubMed

    Richardson, Ruth

    2016-03-01

    The first edition of Anatomy Descriptive and Surgical (1858) was greeted with accolades, but also provoked serious controversy concerning Henry Gray's failure to acknowledge the work of earlier anatomists. A review in the Medical Times (1859) accused Gray of intellectual theft. The journal took the unusual step of substantiating its indictment by publishing twenty parallel texts from Gray and from a pre-existing textbook, Quain's Anatomy. At the recent "Vesalius Continuum" conference in Zakynthos, Greece (2014) Professor Brion Benninger disputed the theft by announcing from the floor the results of a computer analysis of both texts, which he reported exonerated Gray by revealing no evidence of plagiarism. The analysis has not been forthcoming, however, despite requests. Here the historian of Gray's Anatomy supplements the argument set out in the Medical Times 150 years ago with data suggesting unwelcome personality traits in Henry Gray, and demonstrating the utility of others' work to his professional advancement. Fair dealing in the world of anatomy and indeed the genuineness of the lustre of medical fame are important matters, but whether quantitative evidence has anything to add to the discussion concerning Gray's probity can be assessed only if Benninger makes public his computer analysis.

  17. Rim of Henry Crater

    NASA Technical Reports Server (NTRS)

    2002-01-01

    (Released 02 April 2002) This portion of the rim of Henry Crater has numerous dark streaks located on the slopes of the inner crater wall. These dark slope streaks have been suggested to have formed when the relatively bright dust that mantles the slopes slides downhill, either exposing a dust-free darker surface or creating a darker surface by increasing its roughness. The topography in this region appears muted, indicating the presence of regional dust mantling. The materials on floor of the crater (middle to lower left) are layered, with differing degrees of hardness and resistance to erosion producing cliffs (resistant layers) and ledges (easily eroded layers). These layered materials may have been originally deposited in water, although deposition by other means, such as windblown dust and sand, is also possible. Henry Crater, named after a 19th Century French astronomer, is 170 km in diameter and is located at 10.9o N, 336.7o W (23.3o E) in a region called Arabia Terra.

  18. Take a Hike with Henry.

    ERIC Educational Resources Information Center

    Joseph, Linda C.

    2000-01-01

    Presents activities and relevant Web sites associated with the picture book "Henry Hikes to Fitchburg" which is based on a passage from "Walden" by Henry David Thoreau. Includes author sites, Library of Congress sites, town profiles and histories, nature crafts, and recipes. (LRW)

  19. Take a Hike with Henry.

    ERIC Educational Resources Information Center

    Joseph, Linda C.

    2000-01-01

    Presents activities and relevant Web sites associated with the picture book "Henry Hikes to Fitchburg" which is based on a passage from "Walden" by Henry David Thoreau. Includes author sites, Library of Congress sites, town profiles and histories, nature crafts, and recipes. (LRW)

  20. Joseph Henry and Astronomy

    NASA Astrophysics Data System (ADS)

    Rothenberg, Marc

    2016-01-01

    Joseph Henry (1797-1878) is best known for his work in electromagnetism and as the first secretary of the Smithsonian Institution. But he was also a pioneer solar physicist, an early advocate of US participation in astrophysics, and a facilitator of international cooperation in astronomy. This paper will briefly trace his role in the development of the US astronomical community from the time he taught astronomy at Princeton in the 1830s through his death, focusing on failed efforts to persuade US astronomers and patrons of astronomy that the best path for US astronomy should be astrophysics. He thought that the US could make a more significant contribution to astronomy science by striking out on a less travelled path rather than competing with the established European observatories.

  1. Unified Scaling Law for flux pinning in practical superconductors: II. Parameter testing, scaling constants, and the Extrapolative Scaling Expression

    NASA Astrophysics Data System (ADS)

    Ekin, Jack W.; Cheggour, Najib; Goodrich, Loren; Splett, Jolene; Bordini, Bernardo; Richter, David

    2016-12-01

    A scaling study of several thousand Nb3Sn critical-current (I c) measurements is used to derive the Extrapolative Scaling Expression (ESE), a relation that can quickly and accurately extrapolate limited datasets to obtain full three-dimensional dependences of I c on magnetic field (B), temperature (T), and mechanical strain (ɛ). The relation has the advantage of being easy to implement, and offers significant savings in sample characterization time and a useful tool for magnet design. Thorough data-based analysis of the general parameterization of the Unified Scaling Law (USL) shows the existence of three universal scaling constants for practical Nb3Sn conductors. The study also identifies the scaling parameters that are conductor specific and need to be fitted to each conductor. This investigation includes two new, rare, and very large I c(B,T,ɛ) datasets (each with nearly a thousand I c measurements spanning magnetic fields from 1 to 16 T, temperatures from ˜2.26 to 14 K, and intrinsic strains from -1.1% to +0.3%). The results are summarized in terms of the general USL parameters given in table 3 of Part 1 (Ekin J W 2010 Supercond. Sci. Technol. 23 083001) of this series of articles. The scaling constants determined for practical Nb3Sn conductors are: the upper-critical-field temperature parameter v = 1.50 ± 0.04 the cross-link parameter w = 3.0 ± 0.3 and the strain curvature parameter u = 1.7 ± 0.1 (from equation (29) for b c2(ɛ) in Part 1). These constants and required fitting parameters result in the ESE relation, given by I c ( B , T , ɛ ) B = C [ b c 2 ( ɛ ) ] s ( 1 - t 1.5 ) η - μ ( 1 - t 2 ) μ b p ( 1 - b ) q with reduced magnetic field b ≡ B/B c2*(T,ɛ) and reduced temperature t ≡ T/T c*(ɛ), where: B c 2 * ( T , ɛ ) = B c 2 * ( 0 , 0 ) ( 1 - t 1.5 ) b c 2 ( ɛ ) T c * ( ɛ ) = T c * ( 0 ) [ b c 2 ( ɛ ) ] 1/3 and fitting parameters: C, B c2*(0,0), T c*(0), s, either η or μ (but not both), plus the parameters in the strain function b c2

  2. Air-Liquid Partition Coefficient for a Diverse Set of Organic Compounds: Henry’s Law Constant in Water and Hexadecane

    EPA Science Inventory

    The SPARC vapor pressure and activity coefficient models were coupled to estimate Henry’s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar solute organic compounds without modification to/or additional parameterization of the vapor pressure or...

  3. Air-Liquid Partition Coefficient for a Diverse Set of Organic Compounds: Henry’s Law Constant in Water and Hexadecane

    EPA Science Inventory

    The SPARC vapor pressure and activity coefficient models were coupled to estimate Henry’s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar solute organic compounds without modification to/or additional parameterization of the vapor pressure or...

  4. Henry’s Law Constant and Overall Mass Transfer Coefficient for Formaldehyde Emission from Small Water Pools under Simulated Indoor Environmental Conditions

    EPA Science Inventory

    The Henry’s law constant (HLC) and the overall mass transfer coefficient are both important parameters for modeling formaldehyde emissions from aqueous solutions. In this work, the apparent HLCs for aqueous formaldehyde solutions were determined in the concentration range from 0....

  5. Henry’s Law Constant and Overall Mass Transfer Coefficient for Formaldehyde Emission from Small Water Pools under Simulated Indoor Environmental Conditions

    EPA Science Inventory

    The Henry’s law constant (HLC) and the overall mass transfer coefficient are both important parameters for modeling formaldehyde emissions from aqueous solutions. In this work, the apparent HLCs for aqueous formaldehyde solutions were determined in the concentration range from 0....

  6. Disobeying Immoral Laws.

    ERIC Educational Resources Information Center

    Israel, Elfie

    1994-01-01

    Describes how one teacher continued to teach after becoming pregnant, even though this was against school policy. Reminds teachers that Henry Thoreau claimed it is moral to disobey an immoral law. (HB)

  7. Law.

    ERIC Educational Resources Information Center

    Walker, W. R.; Cox, W. E.

    1978-01-01

    Presents a literature review of the legal issues relative to water quality covering publications of 1977. Consideration is given to federal laws, Supreme Court cases, and the impact of federal environmental laws on local government. A list of 47 references is also presented. (HM)

  8. Law.

    ERIC Educational Resources Information Center

    Walker, W. R.; Cox, W. E.

    1978-01-01

    Presents a literature review of the legal issues relative to water quality covering publications of 1977. Consideration is given to federal laws, Supreme Court cases, and the impact of federal environmental laws on local government. A list of 47 references is also presented. (HM)

  9. Henry Giroux and the Arts

    ERIC Educational Resources Information Center

    Trend, David

    2012-01-01

    Henry A. Giroux is well known for pushing the definitions of education. From his early forays into what has been termed the "New Sociology of Education" in the early 1980s to his more recent discussions of "public pedagogy", Giroux has methodically challenged existing orthodoxies. This essay will focus on the interdisciplinary broadening of…

  10. [The Henry E. Huntington Library.

    ERIC Educational Resources Information Center

    Abraham, Terry

    The biographical sketch of Henry E. Huntington includes a description of the establishment of the Huntington Library and the purpose and scope of its collection. Although this is a free and public library, its use is restricted to qualified scholars having legitimate research needs. Photographic techniques were developed at the Huntington Library…

  11. The Right Fit for Henry

    ERIC Educational Resources Information Center

    Gould, J. Christine; Staff, Linda K.; Theiss, Heather M.

    2012-01-01

    When Henry was enrolled in a gifted program in 3rd grade, he showed many of the classic signs of giftedness, but his reading and writing skills were below grade level. An evaluation revealed that he was twice-exceptional--he was gifted and he had a learning disability. Believing that both his giftedness and his learning disability warranted…

  12. The Beauty of Henri Matisse

    ERIC Educational Resources Information Center

    Carrier, David

    2004-01-01

    Because beauty has for a long time now been politically incorrect (at least among certain influential critics and academic historians) the art of Henri Matisse has recently suffered from a kind of benign neglect. His goals were luxury, calm, and voluptuousness, not social critique. Liberated from any vital connection with everyday life, they often…

  13. The Right Fit for Henry

    ERIC Educational Resources Information Center

    Gould, J. Christine; Staff, Linda K.; Theiss, Heather M.

    2012-01-01

    When Henry was enrolled in a gifted program in 3rd grade, he showed many of the classic signs of giftedness, but his reading and writing skills were below grade level. An evaluation revealed that he was twice-exceptional--he was gifted and he had a learning disability. Believing that both his giftedness and his learning disability warranted…

  14. Josh Billings (Henry Wheeler Shaw).

    ERIC Educational Resources Information Center

    Kesterson, David B.

    Designed for use by the general reader, the college student, and the teacher, this book analyzes the life and literary career of Josh Billings (Henry Wheeler Shaw), emphasizing his literary ventures and artistic talents. The analysis reveals Billings' talents as a subtle humorist, homespun philosopher, and artist of the essay. Chapters include…

  15. Henry Giroux and the Arts

    ERIC Educational Resources Information Center

    Trend, David

    2012-01-01

    Henry A. Giroux is well known for pushing the definitions of education. From his early forays into what has been termed the "New Sociology of Education" in the early 1980s to his more recent discussions of "public pedagogy", Giroux has methodically challenged existing orthodoxies. This essay will focus on the interdisciplinary broadening of…

  16. Determination of Paris' law constants and crack length evolution via Extended and Unscented Kalman filter: An application to aircraft fuselage panels

    NASA Astrophysics Data System (ADS)

    Wang, Yiwei; Binaud, Nicolas; Gogu, Christian; Bes, Christian; Fu, Jian

    2016-12-01

    Prediction of fatigue crack length in aircraft fuselage panels is one of the key issues for aircraft structural safety since it helps prevent catastrophic failures. Accurate estimation of crack length propagation is also meaningful for helping develop aircraft maintenance strategies. Paris' law is often used to capture the dynamics of fatigue crack propagation in metallic material. However, uncertainties are often present in the crack growth model, measured crack size and pressure differential in each flight and need to be accounted for accurate prediction. The aim of this paper is to estimate the two unknown Paris' law constants m and C as well as the crack length evolution by taking into account these uncertainties. Due to the nonlinear nature of the Paris' law, we propose here an on-line estimation algorithm based on two widespread nonlinear filtering techniques, Extended Kalman filter (EKF) and Unscented Kalman filter (UKF). The numerical experiments indicate that both EKF and UKF estimated the crack length well and accurately identified the unknown parameters. Although UKF is theoretical superior to EKF, in this Paris' law application EKF is comparable in accuracy to UKF and requires less computational expense.

  17. Wormhole spectrum of a quantum Friedmann-Robertson-Walker cosmology minimally coupled to a power-law scalar field and the cosmological constant

    NASA Astrophysics Data System (ADS)

    Kim, Sang Pyo; Page, Don N.

    1992-05-01

    The expansion of the wave function of a quantum Friedmann-Robertson-Walker cosmology minimally coupled to a scalar field with a power-law potential by its scalar-field part decouples the gravitational-field part into an infinite system of linear homogeneous differential equations (equivalent to a matrix equation). The solutions for the gravitational-field part are found in the product integral formulation. It is shown that there exists a spectrum of the wave functions exponentially damped for large three-geometries under the condition that the cosmological constant should vanish. These are interpeted as the Hawking-Page wormholes.

  18. Henry Taube: inorganic chemist extraordinaire.

    PubMed

    Creutz, Carol; Ford, Peter C; Meyer, Thomas J

    2006-09-04

    The numerous innovative contributions of Henry Taube to modern inorganic chemistry are briefly reviewed. Highlights include the determination of solvation numbers and lability, elucidation of substitution mechanisms, discovery and documentation of inner-sphere electron transfer, and discovery of the remarkable coordination chemistry of ruthenium and osmium ammine complexes with unsaturated ligands and mixed-valence complexes and their fundamental relationship to intramolecular electron transfer.

  19. Henry Morgenthau's voice in history.

    PubMed

    Steiner, Pamela

    2015-01-01

    Henry Morgenthau (1856-1946) distinguished himself as the U.S. Ambassador to the Ottoman Empire, 1913-1916, and as the chairman of the League of Nations Refugee Settlement Commission (RSC) for Greece, 1923-24. I describe aspects of his early life that shaped the man he became, his accomplishments in these two posts, and his feelings about himself over time. At the end I briefly describe his attitude toward a possible Jewish state in Palestine.

  20. Development of Monopole Interaction Models for Ionic Compounds. Part I: Estimation of Aqueous Henry’s Law Constants for Ions and Gas Phase pKa Values for Acidic Compounds

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henry’s Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aq...

  1. Development of Monopole Interaction Models for Ionic Compounds. Part I: Estimation of Aqueous Henry’s Law Constants for Ions and Gas Phase pKa Values for Acidic Compounds

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henry’s Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aq...

  2. Layered Yardangs in Henry Crater

    NASA Technical Reports Server (NTRS)

    2003-01-01

    MGS MOC Release No. MOC2-389, 12 June 2003

    This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows wind-sculpted remnants of layered sedimentary rock that once completely covered the northwestern floor of Henry Crater, an ancient impact basin located at 11.7oN, 336.4oW. These landforms, shaped somewhat like inverted boat hulls, are 'textbook examples' of a wind erosion form known as a yardang. The image covers an area 2.3 km (1.4 mi) wide; sunlight illuminates the scene from the left.

  3. The Don Henry Story. Teaching with Documents.

    ERIC Educational Resources Information Center

    National Archives and Records Administration, Washington, DC.

    Don Henry was a student at the University of Kansas (Lawrence, Kansas) who experienced a profound political change during his years on campus. Henry became a leader in radical campus organizations, volunteered to fight in the Spanish Civil War with the Lincoln Brigade, and died on the battlefield in Aragon (Spain) in September 1937. An article in…

  4. The Don Henry Story. Teaching with Documents.

    ERIC Educational Resources Information Center

    National Archives and Records Administration, Washington, DC.

    Don Henry was a student at the University of Kansas (Lawrence, Kansas) who experienced a profound political change during his years on campus. Henry became a leader in radical campus organizations, volunteered to fight in the Spanish Civil War with the Lincoln Brigade, and died on the battlefield in Aragon (Spain) in September 1937. An article in…

  5. John Henry--The Steel Driving Man

    ERIC Educational Resources Information Center

    Murphy, David E.; Gulley, Laura L.

    2005-01-01

    The story of John Henry provided the setting for sixth-grade class to participate in a John Henry Day of mathematics experiments. The students collected data from experiments where students competed against machines and technology. The student analyzed the data by comparing two box plots, a box plot of human data, and a box plot of machine or…

  6. John Henry--The Steel Driving Man

    ERIC Educational Resources Information Center

    Murphy, David E.; Gulley, Laura L.

    2005-01-01

    The story of John Henry provided the setting for sixth-grade class to participate in a John Henry Day of mathematics experiments. The students collected data from experiments where students competed against machines and technology. The student analyzed the data by comparing two box plots, a box plot of human data, and a box plot of machine or…

  7. Henry (Hank) J. Moore (1928-1998)

    NASA Astrophysics Data System (ADS)

    Thompson, Thomas W.

    Henry (Hank) J. Moore, a member of the AGU Planetary Sciences section, died of a heart attack on September 21, 1998. He was in Utah while on a family trip to visit his daughter. His 70th birthday occurred just 3 weeks before his death. Henry, who was born in Albuquerque, New Mexico, took great pride in having found and visited the small town of Albuquerque in the Extremadura region of Spain, noting the geologic similarities between that part of Spain and his birthplace in America.Henry, known for his contributions to the Apollo,Viking, Magellan, and Mars Pathfinder missions, attributed his career to a chance encounter with Gene Shoemaker in 1960. Henry was completing his Ph.D. work in geology at Stanford University and Gene obviously had spotted Henry's keen analytical mind. I suspect this pivotal meeting was far from a chance encounter.

  8. Endoscopic Release of Master Knot of Henry.

    PubMed

    Lui, Tun Hing

    2015-12-01

    A post-traumatic partial tear of the flexor hallucis longus tendon at the master knot of Henry and the resultant fibrosis of the knot can result in pain at the medial foot arch or posteromedial ankle pain with trigger hallux. Open debridement of the master knot of Henry is indicated if the symptoms do not improve with nonoperative treatment. The open procedure requires extensive soft-tissue dissection because the master knot of Henry is a deep structure. Endoscopic release of the master knot of Henry is an alternative to the open procedure and has the advantage of less surgical trauma and potential for less chance of recurrence of fibrosis of the master knot of Henry.

  9. Geology of the Henry Mountains

    USGS Publications Warehouse

    Gilbert, G.K.

    1877-01-01

    If these pages fail to give a correct account of the structure of the Henry Mountains the fault is mine and I have no excuse. In all the earlier exploration of the Rocky Mountain Region, as well as in much of the more recent survey, the geologist has merely accompanied the geographer and has had no voice in the determination of either the route or the rate of travel. When the structure of a mountain was in doubt he was rarely able to visit the points which should resolve the doubt, but was compelled to turn regretfully away. Not so in the survey of the Henry Mountains. Geological exploration had shown that they were well disposed for examination, and that they promised to give the key to a type of structure which was at best obscurely known; and I was sent by Professor Powell to make a study of them, without restriction as to my order or method. I was limited only in time, the snow stopping my work two months after it was begun. Two months would be far too short a period in which to survey a thousand square miles in Pennsylvania or Illinois, but among the Colorado Plateaus it proved sufficient. A few comprehensive views from mountain tops gave the general distribution of the formations, and the remainder of the time was spent in the examination of the localities which best displayed the peculiar features of the structure. So thorough was the display and so satisfactory the examination, that in preparing my report I have felt less than ever before the desire to revisit the field and prove my conclusions by more extended observation.

  10. Change is a Constant.

    PubMed

    Lubowitz, James H; Provencher, Matthew T; Brand, Jefferson C; Rossi, Michael J; Poehling, Gary G

    2015-06-01

    In 2015, Henry P. Hackett, Managing Editor, Arthroscopy, retires, and Edward A. Goss, Executive Director, Arthroscopy Association of North America (AANA), retires. Association is a positive constant, in a time of change. With change comes a need for continuing education, research, and sharing of ideas. While the quality of education at AANA and ISAKOS is superior and most relevant, the unique reason to travel and meet is the opportunity to interact with innovative colleagues. Personal interaction best stimulates new ideas to improve patient care, research, and teaching. Through our network, we best create innovation.

  11. Joseph Henry and the American Philosophical Society

    ERIC Educational Resources Information Center

    Gross, Walter E.

    1972-01-01

    A study of the extent to which Henry was affiliated with the Society and its influence on his work including his evolving relationship with the Society in the scope of the changing nature of American scientific institutions. (DF)

  12. The strange case of Sir Henry Gray.

    PubMed

    Adam, A; Hutchison, J D; Scotland, T R

    2010-02-01

    Sir Henry Williamson Gray was a prominent Aberdeen surgeon who took up the post of Chief of Surgery at the Royal Victoria Hospital, Montreal in 1923. In what subsequently became known as "The Sir Henry Williamson Gray Affair" in the annals of McGill University, his career was ruined and his reputation left in tatters. The authors examine the available evidence and conclude that Gray was treated unfairly. They hope they have helped restore his name and reputation.

  13. Obituary: Henry Emil Kandrup, 1955-2003

    NASA Astrophysics Data System (ADS)

    Merritt, David; Gottesman, Stephen T.

    2004-12-01

    Henry Emil Kandrup died on 18 October 2003 at his home in Gainesville Florida. Henry was a theoretical astrophysicist specializing in the application of chaotic dynamics to stellar systems. At the time of his death, Henry was a Professor at the University of Florida where he had taught for 13 years. Henry was born in Manhasset, New York on July 24, 1955 and spent most of his childhood in Great Neck. His parents, Jytte and Fred, were immigrants from Denmark where his father had worked as a silver smith. Henry was a precocious child, skipping both third and fifth grades. With the help of Sidney Spivack, a professor of sociology at Columbia University, his parents enrolled Henry in the Brooks Preparatory School in Andover, Massachusetts. After graduating at age 16, Henry enrolled at Cornell, transferring to Princeton the following year. Henry's parents adored their only child and worked hard to provide him with intellectual opportunities. Henry became an accomplished musician (organ, piano, French horn) and linguist (English, Danish, German) and was a passionate devotee of opera and ballet. Henry received his PhD in 1980 from the University of Chicago, where his thesis advisor was James Ipser. He taught at Oakland University in Michigan and Syracuse University in New York before coming to the University of Florida in 1990. Henry was sui generis. He shunned conventionality in his personal appearance and in his public demeanor, and always chose forthrightness and candor over polite silence. But to those of us who knew Henry well, his bluntness was a reflection of his intellectual consistency. Henry always said exactly what he thought, both in his published work and his public presentations, and never compromised himself for the sake of appearances. Nothing that he said or wrote was less than fully thought out. Henry's PhD thesis was entitled "Stochastic Problems in Stellar Dynamics," and most of his subsequent research was in this field. Motion in stellar systems can be

  14. Henry Cavendish and the density of the earth

    NASA Astrophysics Data System (ADS)

    Lally, Sean P.

    1999-01-01

    From the fall of 1797 through the spring of 1798, Henry Cavendish performed a series of experiments, which now bear his name, that were aimed at determining the density of Earth. While Cavendish is rightfully considered a brilliant experimenter by many historians, he is often credited (in both popular and historical literature) as the scientist who first accurately weighed the Earth and determined the universal constant of gravitation, G. While the universal constant of gravitation and the mass (or weight) of the Earth can indeed be calculated from the density of the Earth, this was neither Cavendish's result nor his intent in writing "Experiments to Determine the Density of the Earth." Rather, Cavendish's interest lies in solving an eighteenth-century dispute: what is the mean density of the Earth?

  15. Joseph Henry's Conception of Scientific Knowledge

    NASA Astrophysics Data System (ADS)

    Theerman, Paul

    1997-04-01

    Joseph Henry, America's premier physicist and physics teacher in the mid-nineteenth century, had decided views of scientific knowledge. These were expressed in two ways. First of all, scientific knowledge led to moral betterment. Thus the study of science was a morally good thing. This was not only because it led to the contemplation of God's creation, which was a standard reason justifying the study of science dating from the Scientific Revolution and even earlier. More importantly, the study of science itself was a moral discipline, imparting to scientists the habits and virtues of truthfulness, respect for others, care and diligence, and the discernment of meaningful patterns from experience. The moral ideals of science were expressed most strongly in Henry's upholding the international "Republic of Science"; conversely, cheapening science was a sign of moral failure. Second, for Henry and his generation, science provided a path to sure truth, separate from falsehood of both the politics and the quackery that characterized mid-century public life. Henry promoted this in his championing of the Smithsonian Institution a scientific establishment, against the ideas of others who wanted to make it a literary establishment or a training school for teachers. For Henry, the Smithsonian's scientific reputation would be established by relying on careful peer review in its publications, and supporting established scientists to write authoritative popular works. The purpose of both these activities was to raise the profile of science in the United States and further establish science and the scientific method as a guide to public life.

  16. Cavendish, Henry (1731-1810)

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    English chemist and physicist. Cavendish used a sensitive torsion balance (the Cavendish balance), which was made to oscillate under the gravitational force of attraction of large masses, to measure the value of the gravitational constant, G, and used his value to determine the mass of the Earth....

  17. Inwood Hill Park underpass, below Henry Hudson Parkway southbound, looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Inwood Hill Park underpass, below Henry Hudson Parkway southbound, looking southeast. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  18. History into Drama: The Perspective of "1 Henry IV."

    ERIC Educational Resources Information Center

    Champion, Larry S.

    1978-01-01

    Contrasts Shakespeare's "Henry V" and "Henry IV" series, in which human interaction becomes history, with plays such as "Julius Caesar," which focus on psychological analysis and the internalized protagonist. (MB)

  19. History into Drama: The Perspective of "1 Henry IV."

    ERIC Educational Resources Information Center

    Champion, Larry S.

    1978-01-01

    Contrasts Shakespeare's "Henry V" and "Henry IV" series, in which human interaction becomes history, with plays such as "Julius Caesar," which focus on psychological analysis and the internalized protagonist. (MB)

  20. View of fourlane Henry Hudson Parkway winding through Riverdale, showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of four-lane Henry Hudson Parkway winding through Riverdale, showing service roads, from White Hall Cooperative Apartments. Henry Hudson Bridge, Inwood Hill Park, the Cloisters and Fort Tryon Park, George Washington Bridge, and Manhattan skyline in background, looking southwest. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  1. Lou Henry Hoover and the Girl Scouts: A Tribute.

    ERIC Educational Resources Information Center

    McMullin, Dare Stark

    This booklet is a special tribute to Lou Henry Hoover, wife of President Herbert Hoover, from a close friend, social secretary, and chief research assistant to the First Lady. The small booklet provides a look at the social history of the era by focusing on Lou Henry Hoover and her interest in the outdoors. Lou Henry Hoover was the first women to…

  2. The Ideas of Henry Jenkins and Libraries

    ERIC Educational Resources Information Center

    Anderson, Byron

    2008-01-01

    Henry Jenkins, director of the Comparative Media Studies Program at the Massachusetts Institute of Technology and keynote speaker at the 2007 American Library Association's "Gaming, Learning and Libraries Symposium" in Chicago is a visionary leader in the areas of new media and media convergence. In a white paper on digital media and learning…

  3. Robert Henry Thurston: Professionalism and Engineering Education

    ERIC Educational Resources Information Center

    Nienkamp, Paul

    2016-01-01

    Robert Henry Thurston is presented in this article. He provides one the most significant examples of professionalizing engineering through innovative education and promoting scientific education practices in the late nineteenth century. The son of a draftsmen and steam engine mechanic, Thurston spent his early years in Providence, Rhode Island.…

  4. Appreciating Gantos' Jack Henry as an Archetype.

    ERIC Educational Resources Information Center

    Watson, Jinx Stapleton

    2001-01-01

    Examines the contemporary realism of the literary character Jack Henry, a middle school child, as representative of two classic literary elements, the quest cycle and the lone hero. Concludes that classic structures of plots and characteristics of hero offer many modern protagonists a shape for their realistic and ordinary adventures. (SG/47)

  5. The Historical World of Henry Adams

    ERIC Educational Resources Information Center

    Blaser, Kent

    1976-01-01

    This paper examines Henry Adams' writings on history by considering four topics which comprise the basis of his thinking: politics, religion, sex, and science. Adam's main goal was to make history a means of exploring the most significant dimensions of human being. (Author/RM)

  6. Appreciating Gantos' Jack Henry as an Archetype.

    ERIC Educational Resources Information Center

    Watson, Jinx Stapleton

    2001-01-01

    Examines the contemporary realism of the literary character Jack Henry, a middle school child, as representative of two classic literary elements, the quest cycle and the lone hero. Concludes that classic structures of plots and characteristics of hero offer many modern protagonists a shape for their realistic and ordinary adventures. (SG/47)

  7. Henry James on the Art of Acting.

    ERIC Educational Resources Information Center

    Thompson, David W.

    Henry James, the nineteenth-century American novelist, also served on occasion as a theatre critic. Between 1875 and 1890 he reviewed several productions in Boston, New York, London, and Paris for "Atlantic Monthly" and other periodicals. The reviews are of interest because of James' high standards regarding acting and his often…

  8. Heroes of peer review: Hyongbum (Henry) Kim.

    PubMed

    Kim, Hyongbum

    2016-09-29

    Peer reviewers are the unsung heroes of science. We celebrate reviewers through a series of interviews with people who have made particularly strong recent contributions to Genome Biology as reviewers. The first interview is with Hyongbum (Henry) Kim, an Associate Professor at Yonsei University College of Medicine in South Korea.

  9. Livres d'Artiste: Henri Matisse, Jazz.

    ERIC Educational Resources Information Center

    Godlewski, Susan Glover

    1990-01-01

    Outlines the life of Henri Matisse and how he created his paper cut-outs, which were reproduced in a book. Discusses the importance of artists' books. Suggests some creative activities for all grades in book making and paper cut-outs that could be worked in conjunction with a language arts program. (KM)

  10. In the Style of Henry Moore

    ERIC Educational Resources Information Center

    Hinshaw, Craig

    2010-01-01

    In this article, the author describes an art project inspired by Henry Moore's sculptures. This project consists of two activities. In the first activity, students select, sand and stain a wood block that would become a base for their plaster sculpture. This activity would keep the students independently engaged (classroom management) while the…

  11. The Ideas of Henry Jenkins and Libraries

    ERIC Educational Resources Information Center

    Anderson, Byron

    2008-01-01

    Henry Jenkins, director of the Comparative Media Studies Program at the Massachusetts Institute of Technology and keynote speaker at the 2007 American Library Association's "Gaming, Learning and Libraries Symposium" in Chicago is a visionary leader in the areas of new media and media convergence. In a white paper on digital media and learning…

  12. In the Style of Henry Moore

    ERIC Educational Resources Information Center

    Hinshaw, Craig

    2010-01-01

    In this article, the author describes an art project inspired by Henry Moore's sculptures. This project consists of two activities. In the first activity, students select, sand and stain a wood block that would become a base for their plaster sculpture. This activity would keep the students independently engaged (classroom management) while the…

  13. Antoine-Henri Jomini: A Bibliographical Survey.

    ERIC Educational Resources Information Center

    Alger, John I.

    Although the writings of Antoine-Henri Jomini influenced military thought during the 19th and 20th centuries, the obscurity of their publishing history has led to misunderstandings of the development and substance of Jomini's thought. This review attempts to (1) point out the continuity of his thought on the conduct of war, and (2) provide an…

  14. Transcendentalism and Henry Barnard's "School Architecture"

    ERIC Educational Resources Information Center

    Rothfork, John

    1977-01-01

    Sketches the intellectual and sociological climate that led Henry Barnard to advocate Greek Revival architecture for school buildings, takes a look at why this style and its implicit values were popular in the era between 1820-1860, and examines a few of the plans in Barnard's "School Architecture" (1838-48). (Author/RK)

  15. Contaminant Monitoring Strategy for Henrys Lake, Idaho

    SciTech Connect

    John S. Irving; R. P. Breckenridge

    1992-12-01

    Henrys Lake, located in southeastern Idaho, is a large, shallow lake (6,600 acres, {approx} 17.1 feet maximum depth) located at 6,472 feet elevation in Fremont Co., Idaho at the headwaters of the Henrys Fork of the Snake River. The upper watershed is comprised of high mountains of the Targhee National Forest and the lakeshore is surrounded by extensive flats and wetlands, which are mostly privately owned. The lake has been dammed since 1922, and the upper 12 feet of the lake waters are allocated for downriver use. Henrys Lake is a naturally productive lake supporting a nationally recognized ''Blue Ribbon'' trout fishery. There is concern that increasing housing development and cattle grazing may accelerate eutrophication and result in winter and early spring fish kills. There has not been a recent thorough assessment of lake water quality. However, the Department of Environmental Quality (DEQ) is currently conducting a study of water quality on Henrys Lake and tributary streams. Septic systems and lawn runoff from housing developments on the north, west, and southwest shores could potentially contribute to the nutrient enrichment of the lake. Many houses are on steep hillsides where runoff from lawns, driveways, etc. drain into wetland flats along the lake or directly into the lake. In addition, seepage from septic systems (drainfields) drain directly into the wetlands enter groundwater areas that seep into the lake. Cattle grazing along the lake margin, riparian areas, and uplands is likely accelerating erosion and nutrient enrichment. Also, cattle grazing along riparian areas likely adds to nutrient enrichment of the lake through subsurface flow and direct runoff. Stream bank and lakeshore erosion may also accelerate eutrophication by increasing the sedimentation of the lake. Approximately nine streams feed the lake (see map), but flows are often severely reduced or completely eliminated due to irrigation diversion. In addition, subsurface flows can occur as a

  16. A hypothesis: King Henry VIII's (1491-1547) personality change: A case of lead poisoning?

    PubMed

    Charlton, Anne

    2017-05-01

    Henry VIII (1491-1547) became King of England in 1509. He started out as a good monarch, sensible, reasonable and pleasant, but later his behaviour changed drastically. He became irascible, intolerant, violent and tyrannical. In January 1536, Henry had a serious jousting accident and was unconscious for 2 h. It is generally believed that this accident played a major role in his personality change. Letters of that time, however, indicate that the change began insidiously in 1534 and became most drastic in 1535, a year before the accident. Henry had suffered from leg ulcers before and after the accident and had been constantly treated for them for many years. Sloane MS1047, now in the British Library in London, contains the prescriptions for the medications used to treat these ulcers. Many of the medications contain a high proportion of lead in various forms. Lead can be absorbed through skin, especially damaged skin. Absorbed lead can affect the brain, causing psychiatric problems, especially those associated with violence. The author presents a hypothesis that absorbed lead from his medications might have been a major factor in King Henry's personality change.

  17. Henri Laborit and the inhibition of action.

    PubMed

    Kunz, Edward

    2014-03-01

    Henri Laborit was one of the founders of modern neuropsychopharmacology, having discovered, or participated in, the discovery of chlorpromazine, gamma-OH, clomethiazole, and minaprine. He also put forward a theory regarding the necessity of counteracting the negative consequences of defense mechanisms during anesthesia or behavioral inhibition. The scope of his work covers neurophysiology, pharmacology, psychiatry, and psychosomatics. His independence of spirit meant that most of his research was not done within university settings.

  18. Henri Poincaré and the principle of relativity

    NASA Astrophysics Data System (ADS)

    Messager, Valérie; Gilmore, Robert; Letellier, Christophe

    2012-09-01

    Often considered as the last 'encyclopedist', Henri Poincaré died one hundred years ago. If he was a prominent man in 1900 French Society, his heritage is not so clearly recognised, particularly in France. Among his too often misunderstood works is his contribution to the theory of relativity, mainly because it is almost never presented within Poincaré's general approach to science, including his philosophical writings. Our aim is therefore to provide an historical account of the main steps (experimental as well as theoretical) which led Poincaré to contribute to the theory of relativity. Starting from the optical experiments which led to the inconsistency of the classical (Galilean) composition law for velocities to explain light propagation, we introduce the FitzGerald and Lorentz contraction which was viewed as the 'sole hypothesis' to explain the Michelson and Morley experiment. We then show that Poincaré's contribution starts with a discussion of the principles governing the mechanics and was built step by step up to express in all its generality the principle of relativity. Poincaré thus showed the invariance of the Maxwell equations under the Lorentz transformation. In doing so, he also discovered the right composition law for velocities. Poincaré's approach to philosophy is detailed to help the reader to understand what a theory meant to him.

  19. VISTA, GENERAL HENRY LEAVENWORTH MONUMENT AND CONTEXT LOOKING DOWN THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VISTA, GENERAL HENRY LEAVENWORTH MONUMENT AND CONTEXT LOOKING DOWN THE HILL TOWARD BIDDLE BLVD. VIEW TO NORTHEAST. - Fort Leavenworth National Cemetery, 395 Biddle Boulevard, Leavenworth, Leavenworth County, KS

  20. Homage to Henry Beecher (1904-1976).

    PubMed

    Miller, Franklin G

    2012-01-01

    The writings of Henry Beecher (1904-1976) have had an enormous influence on thinking and practice with respect to the ethics of medicine and clinical research. This essay examines the seminal contributions of Beecher as illustrated by four landmark articles concerning the ethics of clinical research, the placebo effect and placebo-controlled trials, the evaluation of invasive procedures, and "brain death" and vital organ transplantation. To appreciate Beecher's legacy, it is salutary to explicate the significance of his enduring contributions and to critically evaluate their limitations.

  1. Henry Barton Jacobs, William Osler's intimate friend.

    PubMed

    Bryan, Charles S

    2017-01-01

    William Osler was considered a universal friend by physicians of his era but, as with most people, his intimate friends were few. Henry Barton Jacobs became a close friend as one of the "latchkeyers" who lived next door to the Oslers in Baltimore, and the friendship intensified after Jacobs married Mary Sloan Frick Garrett, the fabulously wealthy widow of a former patient. The couples stayed close after the Oslers moved to Oxford, vacationing together and corresponding frequently. The couple friendship between the Oslers and the Jacobses benefited American medicine in specific ways, including the care of patients with tuberculosis and the care of children.

  2. Henry Barton Jacobs, William Osler's intimate friend

    PubMed Central

    2017-01-01

    William Osler was considered a universal friend by physicians of his era but, as with most people, his intimate friends were few. Henry Barton Jacobs became a close friend as one of the “latchkeyers” who lived next door to the Oslers in Baltimore, and the friendship intensified after Jacobs married Mary Sloan Frick Garrett, the fabulously wealthy widow of a former patient. The couples stayed close after the Oslers moved to Oxford, vacationing together and corresponding frequently. The couple friendship between the Oslers and the Jacobses benefited American medicine in specific ways, including the care of patients with tuberculosis and the care of children. PMID:28127152

  3. William Henry Bragg (1862-1942)

    NASA Astrophysics Data System (ADS)

    da C. Andrade, E. N.

    In the late fifties Robert John Bragg, a young man of twenty-five, retired from the sea, where he had been serving as an officer in the merchant navy, and purchased with some monies that had been l to him the farm called Stoneraise Place at Westward, near Wigton, in Cumberland; Here he settled down to a farmer's life. In 1861 he married Mary Wood, the daughter of the Vicar of the parish of Westward, and the next year, on 2 July 1862, William Henry Bragg, later to be President of the Royal Society, was born…

  4. Henry Crew, a successful teacher of physics

    NASA Astrophysics Data System (ADS)

    Qiaozhen, Xu; Michaelson, Robert C.

    1987-09-01

    Henry Crew had a long career in teaching physics at Johns Hopkins University, Haverford College, and Northwestern University. In those decades, Crew made great contributions to physics education. He published 13 books including popular textbooks and well-known translations. His 123 scientific articles included works on spectroscopy, physics education, history of science, biographies of physics, and so forth. He was awarded the highest honor for a physics teacher in the United States—the Oersted Medal. At the same time, he was an active scientist, and he participated as a founder of such academic societies as the American Physical Society, the American Association of University Professors, and the History of Science Society.

  5. The medical life of Henry Norman Bethune

    PubMed Central

    Deslauriers, Jean; Goulet, Denis

    2015-01-01

    BACKGROUND: Henry Norman Bethune is one of the most exciting and incredible surgeons that Canada has ever produced. Indeed, he is often characterized as one of the world’s best-known surgeons. He was an innovator and his scientific contributions have stood the test of time. In Canada, he will forever be remembered as a social activist committed to the welfare of the poor and to the reform of the health care system. In the People’s Republic of China, he is idolized and remains the only foreigner to ever become a national hero. OBJECTIVE: To detail the numerous and significant achievements of Henry Norman Bethune in the field of thoracic surgery and as a social activist and describe his heroic war-time actions on the battlefields of both Spain and China. METHOD: Information was gathered through the reading of the numerous publications written about the life and work of Bethune, interviews with knowledgeable people from Canadian and Chinese universities, analysis of Bethune’s own publications, and extensive experience of one of the authors in China. RESULTS: In the social sense, Henry Norman Bethune had a difficult personality, but he was deeply caring about the plight of his patients, especially the poor. As a thoracic surgeon, he could be ingenious, thoughtful and effective but he could also be abrasive, restless and temperamental. His scientific contributions were sound and, at the time, gained worldwide attention. As an activist, he led a crusade to reform the Canadian health care system, demanding free health care for all. His outstanding work during the Spanish Civil War, where he organized the first ever mobile blood transfusion unit, and during the Sino-Japanese war, where he was totally committed to the welfare of both soldiers and civilian population, were deliberate acts of resistance against Fascist onslaught and enthusiasm for the Communist cause. CONCLUSIONS: Henry Norman Bethune was unconventional and a revolutionary, but he was brilliant. He will

  6. The Rice University Press Initiative: An Interview with Charles Henry

    ERIC Educational Resources Information Center

    Trevitte, Chad; Henry, Charles

    2007-01-01

    In this interview Charles Henry, publisher of the Rice University Press (RUP), discusses RUP's rebirth as a fully digital university press. Henry addresses the circumstances that led to this decision, and he further outlines the RUP business model whereby the press will publish its own titles--both digitally and in print-on-demand--while…

  7. 75 FR 21288 - Henry Gas Storage LLC; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-23

    ... characteristics and the feasibility of developing the Cote Blanche Island salt dome for natural gas storage in St... Energy Regulatory Commission Henry Gas Storage LLC; Notice of Application April 16, 2010. Take notice that on April 5, 2010, Henry Gas Storage LLC (HGS), 1010 Lamar, Suite 1720, Houston, Texas 77002,...

  8. Dialogue of Differences: The Writing of Henry Holmes Smith.

    ERIC Educational Resources Information Center

    Bossen, Howard

    In addition to surveying the writings of Henry Holmes Smith, this paper explains his importance as a theoretician and practitioner of photography. After a discussion of Smith's ideas on "reading photographs" and his concerns with the ethics of photography, particularly of photojournalism, the essays in the book, "Henry Holmes Smith:…

  9. Memory Drum Theory's C Movement: Revelations from Franklin Henry

    ERIC Educational Resources Information Center

    Fischman, Mark G.; Christina, Robert W.; Anson, J. Greg

    2008-01-01

    Franklin Henry's "memory drum" theory of neuromotor reaction (Henry & Rogers, 1960) was one of the most influential studies of the response programming stage of information processing. The paper is the most-cited study ever published in the "Research Quarterly for Exercise and Sport." However, few people know there is a noteworthy error in the…

  10. Professor Henry, Mr. Faraday, and the Hunt for Electromagnetic Induction

    NASA Astrophysics Data System (ADS)

    Moyer, Albert E.

    1997-04-01

    On different sides of the Atlantic but about the same time, Michael Faraday and Joseph Henry announced success in a quest that had preoccupied the scientific community for a decade: coaxing electricity from magnetism. "Mutual induction," what Faraday and Henry had identified in the early 1830s, would turn out to be not only a foundational concept in the physics of electricity and magnetism but also the principle behind the technology of electrical transformers and generators--two mainstays of industrialization. Although Faraday's breakthrough in London and Henry's in Albany might appear to be classic examples of "independent discovery," they were not. The two natural philosophers shared a similar orientation toward their research and, moreover, a distinctive laboratory instrument: Henry's new, powerful electromagnet. Thus, the story of Henry's and Faraday's search for induction illuminates not only the workings of Victorian science but also the crucial part that an instrument--the unadorned hardware--can play in scientific inquiry. Albert Moyer takes this story from his biography of Joseph Henry that Smithsonian Institution Press is about to publish in commemoration of the 200th anniversary of Henry's birth. The biography focuses on Henry's early and middle years, 1797-1847, from his emergence as America's foremost physical scientist to his election as the Smithsonian Institution's first director.

  11. Teaching Students about the Environment with Henry David Thoreau

    ERIC Educational Resources Information Center

    Curriculum Review, 2008

    2008-01-01

    "Walden: The Ballad of Thoreau" is a two-act four-character play about the final two days writer Henry David Thoreau spent in his cabin before leaving Walden Pond. Teachers can use this play to teach about preserving the earth to students. This article presents a brief synopsis of the play and a brief biography of Henry David Thoreau.

  12. West Harlem Walk (Hudson River Valley Greenway) beneath Henry Hudson ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    West Harlem Walk (Hudson River Valley Greenway) beneath Henry Hudson Parkway (HHP) Viaduct at West 155th Street vicinity, with Palisades, George Washington Bridge, and Little Red Lighthouse (visible to left of bridge tower) in background, looking northeast. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  13. Henry Hudson Bridge toll plaza, upper level, looking west. Pipe ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge toll plaza, upper level, looking west. Pipe railing parapets and pedestrian walkway on left. Inwood Hill Park in background. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  14. 77 FR 70159 - Knueppel, Henry W.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-23

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Knueppel, Henry W.; Notice of Filing Take notice that on November 15, 2012, Henry W. Knueppel submitted for filing, an application for authority to hold interlocking positions...

  15. View of Harlem River Shipping Canal from Henry Hudson Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of Harlem River Shipping Canal from Henry Hudson Bridge, looking southeast. Isham Park in center, Inwood Hill Park at right. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  16. Henry Hudson Bridge over Harlem River Shipping Canal at confluence ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge over Harlem River Shipping Canal at confluence with Hudson River, from Isham Park, view northeast. Inwood Hill Park on left, Spuyten Duyvil Shorefront Park on right, Palisades Interstate Park in background. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  17. Henry Hudson Bridge upper deck and pedestrian walkway showing parapets ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge upper deck and pedestrian walkway showing parapets with pipe rails. View of Inwood Hill Park in background, with a faint view of the Empire State Building amidst distant highrises at left, looking south. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  18. Teaching Students about the Environment with Henry David Thoreau

    ERIC Educational Resources Information Center

    Curriculum Review, 2008

    2008-01-01

    "Walden: The Ballad of Thoreau" is a two-act four-character play about the final two days writer Henry David Thoreau spent in his cabin before leaving Walden Pond. Teachers can use this play to teach about preserving the earth to students. This article presents a brief synopsis of the play and a brief biography of Henry David Thoreau.

  19. View of cars entering Henry Hudson Parkway southbound at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of cars entering Henry Hudson Parkway southbound at the Mosholu Parkway interchange, with outcropping in northwest Van Cortlandt Park in background, looking north. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York County, NY

  20. On an isotherm thermodynamically consistent in Henry's region for describing gas adsorption in microporous materials.

    PubMed

    Pera-Titus, Marc

    2010-05-15

    The Dubinin-Astakhov and Dubinin-Radushkevich isotherms, originally formulated from the classical volume filling theory of micropores, constitute the most accepted models for describing gas adsorption in microporous materials. The most important weakness of these equations relies on the fact that they do not reduce to Henry's law at low pressures, not providing therefore a proper characterization of adsorbents in the early stage of adsorption. In this paper, we propose a way out of this inherent problem using the thermodynamic isotherm developed in a previous study [J. Llorens, M. Pera-Titus, J. Colloid Interface Sci. 331 (2009) 302]. This isotherm allows the generation of a series of equations that make available a comprehensive description of gas adsorption for the whole set of relative pressures (including Henry's region), also providing explicit information about energy heterogeneity of the adsorbent through the two characteristic m parameters of the thermodynamic isotherm (i.e., m(1) and m(2)). The obtained isotherm converges into the Dubinin-Astakhov isotherm for relative pressures higher than 0.1, the characteristic α parameter of this isotherm being expressed as α=m(2)-1 and the affinity coefficient (β) as a sole function of m(2). An expression differing from the Dubinin-Astakhov isotherm has been obtained for describing Henry's region, providing relevant information about confinement effects when applied to zeolites.

  1. Henri Victor Regnault: Experimentalist of the Science of Heat

    NASA Astrophysics Data System (ADS)

    Reif-Acherman, Simón

    2010-12-01

    Henri Victor Regnault (1810-1878) was one of the most famous French experimental scientists of the nineteenth century. After studying and carrying out research at the École Polytechnique and the École des Mines in Paris, he was elected to the Paris Académie des Sciences in 1840 and was appointed Professor of Experimental Physics at the Collège de France in 1841. His initial researches were in chemistry, but his careful experimental investigations of the law of the specific heat of solids that Pierre Louis Dulong (1785-1838) and Alexis Thérèse Petit (1791-1820) proposed in 1818 opened the door to his transition to physics and to his pioneering experimental researches on various thermodynamic properties of liquids and gases. I focus particularly on his investigations on the expansion, compressibility, vapor pressure, and speed of sound in gases. He also made important contributions to the new art of photography and to the ceramic industry as director of the Sèvres factory, at a time when his personal life was filled with tragedy. While his experimental work was acclaimed by his contemporaries, it has been largely neglected by scientists and historians today.

  2. Obituary: Roy Henry Garstang (1925-2009)

    NASA Astrophysics Data System (ADS)

    Malville, J.

    2011-12-01

    Roy Henry Garstang 84 passed away on November 1, 2009 in Boulder Colorado. He was born in Southport, England in September of 1925 to Percy Brocklehurst and Eunice (Gledhill) Garstang. He won a scholarship to Caius College in Cambridge University. Because it was wartime, he could spend only two years at his studies. However, he managed to complete three years of required work during that time, and then spent 1945-46 as a Junior Scientific Officer at the Royal Aircraft Establishment at Farnborough. He received his BA in 1946 from Cambridge, his MA in 1950, and his PhD in Mathematics in 1954, with a thesis: "Atomic Transitions in Astrophysics," working under D. R. Hartree. He also received a ScD from Cambridge in Physics and Chemistry in 1983. He married Ann in August 1959. She and two daughters, Jennifer and Susan, survive him. While still pursuing his PhD, Roy Garstang served as a Research Associate at the Yerkes Observatory, from 1951-1952, working under Subrahmanyan Chandrasekhar. During that time he continued with his own calculations of atomic structure and transition probabilities, although these were not part of Chandra's research interests. After earning his PhD, he went to teach at the University of London, where he also served as the Assistant Director of the University of London Observatory (1959-1964). He was editor of "The Observatory" Magazine form 1953-1960. The continuing theme of this research was to help meet the needs of astrophysicists for atomic data. In 1964, he left England for the United States, where he joined the faculty at the University of Colorado, Boulder, where he would remain for the rest of his professional career. It was entirely fitting, considering his interest in performing calculations of interest to astrophysicists, that soon after arriving in Boulder he was appointed Chairman of JILA - Joint Institute for Laboratory Astrophysics (1966-1967). He was Director of the Division of Physics and AstroGeophysics (1979-80), acting

  3. Are Fundamental Constants Really Constant?

    ERIC Educational Resources Information Center

    Swetman, T. P.

    1972-01-01

    Dirac's classical conclusions, that the values of e2, M and m are constants and the quantity of G decreases with time. Evoked considerable interest among researchers and traces historical development by which further experimental evidence points out that both e and G are constant values. (PS)

  4. Are Fundamental Constants Really Constant?

    ERIC Educational Resources Information Center

    Swetman, T. P.

    1972-01-01

    Dirac's classical conclusions, that the values of e2, M and m are constants and the quantity of G decreases with time. Evoked considerable interest among researchers and traces historical development by which further experimental evidence points out that both e and G are constant values. (PS)

  5. On obtaining the Henry from the Farad

    NASA Astrophysics Data System (ADS)

    Rayner, G. H.; Kibble, B. P.; Swan, M. J.

    1980-03-01

    A self-inductor is made to resonate in a parallel tuned circuit with an adjustable capacitor at a measured frequency so that the impedance of the combination is purely resistive. This method replaces the older Campbell one; it is more accurate, more reliable and more up-to-date. The conductance and residual capacitance of the tuned circuit are measured on a capacitance bridge. The capacitance of the adjustable capacitor and its shunt conductance are then measured separately on the bridge. These measurements together with some corrections of a few ppm for the lead inductance and bridge error are sufficient to determine the value of the self-inductance with a standard error of 3 ppm for inductor of high Q in the 0.05 to 1 Henry range at continuity is however assured to 10 ppm.

  6. Henry Oldenburg - Shaping the Royal Society

    NASA Astrophysics Data System (ADS)

    Boas Hall, Marie

    2002-03-01

    Henry Oldenburg, born in 1619 in Bremen, Germany, first came to England as a diplomat on a mission to see Oliver Cromwell. He stayed on in England and in 1662 became the Secretary of the Royal Society, and its best known member to the entire learned world of his time. Through his extensive correspondence, now published, he disseminated the Society's ideals and methods at home and abroad. He fostered and encouraged the talents of many scientists later to be far more famous than he, including Newton, Flamsteed, Malpighi, and Leeuwenhoek with whom, as with many others, he developed real friendship. He founded and edited the Philosophical Transactions, the world's oldest scientific journal.His career sheds new light on the intellectual world of his time, especially its scientific aspects, and on the development of the Royal Society; his private life expands our knowledge of social mobility, the urban society, and the religious views of his time.

  7. Obituary: Henry Albers (1925-2009)

    NASA Astrophysics Data System (ADS)

    Chromey, Fred

    2011-12-01

    Henry Albers, professor of astronomy at Vassar College for over thirty years, died March 29, 2009, in Fairhope, Alabama. For his work at Vassar, where he held the Maria Mitchell Chair, Albers received the first Maria Mitchell Women in Science Award for his inspiration of women astronomers. He said "In the final analysis it is the students who bring the joy into teaching." As a professional astronomer, Albers did observational work on Galactic structure in the southern Milky Way, and on the structure of the Magellanic Clouds. In retirement, Albers published Maria Mitchell - A Life in Journals and Letters, the firsthand account of America's first woman astronomer. Albers's research was on photographic near-infrared spectroscopy of red giant stars in the southern Milky Way, some proper motion studies, and on the structure of the Magellanic Clouds. A series of seven NSF grants supported his six trips to Chile to make spectroscopic observations, as well as his sabbatical collaborations at Minnesota, Leiden, and the Royal Observatory in Edinburgh. Henry Albers arrived at Vassar in 1958, to find an astronomy program that had been recently absorbed by the physics department, and that was suffering neglect after the retirement of Maud Makemson. For the next 31 years, with incredible energy -- he sometimes taught seven courses a year -- he built the astronomy program into one double in size (from one to two tenure lines), whose th century facilities have been replaced with a st century observatory. For a remarkable stretch of 20-some-years, Albers and physicist Bob Stearns, with considerable grace, alternated chairmanship of the joint department of physics and astronomy. Henry Albers was a devoted citizen of Vassar College and an enthusiastic participant in the process of faculty governance at that institution. He would have been the first to concede that his enthusiasm was sometimes excessive, and that his contributions at faculty meetings occasionally failed to move the

  8. Henry Norris Russell and the Expanding Universe

    NASA Astrophysics Data System (ADS)

    DeVorkin, D.

    2013-04-01

    Henry Norris Russell, one of the most influential American astronomers of the first half of the 20th Century, had a special place in his heart for the Lowell Observatory. Although privately critical of the founder for his pronouncements about life on Mars and the superiority of the Mars Hill observing site, he always supported the Observatory in public and professional circles. He staunchly supported Tombaugh's detection of a planet as leading from Lowell's prediction, and always promoted V. M. Slipher's spectroscopic investigations of planetary and stellar phenomena. But how did he react to Slipher's puzzling detection of the extreme radial velocities of spiral nebulae starting in 1912, and how did he regard the extension and interpretation of those observations by Hubble and others in following decades? Here we describe the arc of Russell's reactions, dating from Slipher's first detection, as an indicator of how mainstream stellar astronomers reacted to the concept of an expanding universe.

  9. Significance of the Henri-Michaelis-Menten theory in abiotic catalysis: catechol oxidation by δ-MnO 2

    NASA Astrophysics Data System (ADS)

    Naidja, A.; Huang, P. M.

    2002-05-01

    The Henri-Michaelis-Menten theory, for more than eight decades, was only restricted to homogeneous enzymatic catalysis. A mimic of an enzymatic kinetics based on the Henri-Michaelis-Menten concept was experimentally observed in heterogeneous catalysis in the present study with δ-MnO 2 as an abiotic catalyst in the oxidation of catechol (1,2-dihydroxybenzene). Using the derived linear forms of Lineweaver-Burk or Hofstee, the data show that similar to the enzyme tyrosinase, the kinetics of the catechol oxidation catalyzed by δ-MnO 2 can be described by the Henri-Michaelis-Menten equation, V0= VmaxS/( Km+ S), where Vmax is the maximum velocity and Km the concentration of the substrate ( S) corresponding to an initial velocity ( V0) half of Vmax. By analogy to the enzymatic kinetics, the parameters Vmax and Km for an heterogeneous abiotic catalysis were derived for the first time. Further, based on the concentration of the active centers of the mineral oxide, the kinetic constants kcat and kcat/ Km, respectively, representing the turnover frequency and the efficiency of the mineral catalyst, were also determined from the derived general rate equation of Briggs and Haldane. As an abiotic catalyst, δ-MnO 2 has a paramount role in the oxidation of phenolic compounds in soil, sediment and water environments. Therefore, the present observation is of fundamental and practical significance in elucidating the affinity between an abiotic catalyst and a substrate based on the Henri-Michaelis-Menten theory.

  10. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 FOUNTAIN AND STATUE IN MISSION PARK AND MISSION MONASTERY (SOUTH FRONT) - Mission San Fernando Rey de Espana, Fountains, Mission Boulevard, San Fernando, Los Angeles County, CA

  11. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 GENERAL VIEW (FROM SOUTH) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  12. 12. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 S. W. CORRIDOR OF PATIO. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  13. 18. Photocopy of Photograph (Original held by Henry Ford Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photocopy of Photograph (Original held by Henry Ford Archives, Dearborn, Michigan, Detroit Edison Negative No. 3545, 5 October 1915) INTERIOR VIEW, MACHINE ROOM, LOOKING SOUTH - Detroit Edison Hart Substation, 11736 East Vernor, Detroit, MI

  14. 4. Historic American Buildings Survey, Henry Pleasants, History of the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey, Henry Pleasants, History of the Old Eagle School, John C. Winston Co., 1909 PHOTOCOPY. - Eagle School, Old Eagle School Road (State Route 543) (Tredyffrin Township), Strafford, Chester County, PA

  15. 3. Historic American Buildings Survey, Henry Pleasants, History of the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey, Henry Pleasants, History of the Old Eagle School, John C. Winston Co., 1909 PHOTOCOPY. - Eagle School, Old Eagle School Road (State Route 543) (Tredyffrin Township), Strafford, Chester County, PA

  16. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 VIEW OF FOUNTAIN IN MISSION PARK, MISSION PROPERTY AT ONE TIME. - Mission San Fernando Rey de Espana, Fountains, Mission Boulevard, San Fernando, Los Angeles County, CA

  17. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 WEST REAR FROM GARDEN SHOWING SOUTH WALL OF PATIO. - Andres Pico House, 10940 Sepulveda Boulevard, San Fernando, Los Angeles County, CA

  18. 3. Historic American Buildings Survey Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey, March 1936. GENERAL VIEW FROM SOUTH. - Mission San Fernando Rey de Espana, Church, Mission Road, San Fernando, Los Angeles County, CA

  19. 7. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 VIEW OF INTERIOR (NORTH WALL AT CHANCEL) - Mission San Fernando Rey de Espana, Church, Mission Road, San Fernando, Los Angeles County, CA

  20. 5. Historic American Buildings Survey Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey Photographed by Henry F. Withey, March 1936 EAST ELEVATION (REAR) - Mission San Fernando Rey de Espana, Church, Mission Road, San Fernando, Los Angeles County, CA

  1. HENRY STREET SCHOOL, 1300 BLOCK BULL STREET, DETAIL OF NORTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HENRY STREET SCHOOL, 1300 BLOCK BULL STREET, DETAIL OF NORTH ELEVATION - Savannah Victorian Historic District, Bounded by Gwinnett, East Broad, West Broad Street & Anderson Lane, Savannah, Chatham County, GA

  2. 17. Photocopy of Photograph (Original held by Henry Ford Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photocopy of Photograph (Original held by Henry Ford Archives, Dearborn, Michigan, Detroit Edison Negative No. 2976, 8 March 1915) NORTH SIDE AND EAST FRONT, FROM HART, LOOKING SOUTH - Detroit Edison Hart Substation, 11736 East Vernor, Detroit, MI

  3. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey September, 1936 VIEW OF FRONT VERANDA TOWARD NORTH - La Casa de Cota de la Cuesta, Lompoc Road, Buellton, Santa Barbara County, CA

  4. 7. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY (S. W. Side) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

  5. 5. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SMITHY AND SOAP FACTORY (LOOKING SOUTH) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

  6. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF FOUNTAIN, SMITHY AND SOAP FACTORY (LOOKING EAST) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

  7. 8. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY FROM EAST CORNER. - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

  8. Henri Poincaré: Death centenary (1854-1912)

    NASA Astrophysics Data System (ADS)

    Heinzmann, Gerhard; Villani, Cédric

    2014-08-01

    The year 2012 marked the centenary of the death of Henri Poincaré (Nancy, 1854-Paris, 1912), and through the agency of the Henri-Poincaré Institute in Paris, the Henri-Poincaré Archives in Nancy and The London Mathematical Society, brought with it several exhibitions and meetings commemorating one of the greatest minds in contemporary times. Often referred to as the last polymath, Poincaré embraced multiple branches of mathematics, theoretical physics and celestial mechanics, and made significant contributions to philosophy of science (Heinzmann & Stump, Henri Poincaré, 2013). He wrote 25 textbooks and monographs, 500-plus articles, and was deeply involved in the organization and administration of science at both the national and international levels.1

  9. 18. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 STONE CHURCH, CEILING OF SANCTUARY - Mission San Juan Capistrano, Stone Church, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  10. 7. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey, Photographed by Henry F. Withey, April 4th, 1934. SOUTH PORCH FROM THE SOUTHWEST - Mrs. A. L. M. Vhay House, 835 Leguna Street, Santa Barbara, Santa Barbara County, CA

  11. 8. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey Photographed by Henry F. Withey April 4th, 1934 SOUTH PORCH AT SOUTHWEST CORNER - Mrs. A. L. M. Vhay House, 835 Leguna Street, Santa Barbara, Santa Barbara County, CA

  12. 9. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey, Photographed by Henry F. Withey, April 4th, 1934 SOUTH PORCH, LOOKING EAST - Mrs. A. L. M. Vhay House, 835 Leguna Street, Santa Barbara, Santa Barbara County, CA

  13. 6. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW OF PATIO CORRIDOR, LOOKING NORTH. - Casa de Pio Pico, Whittier Boulevard & Guirado Street, Whittier, Los Angeles County, CA

  14. 7. Historic American Buildings Survey, Photographed by Henry. F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey, Photographed by Henry. F. Withey, April 19th, 1934 DETAIL OF STAIRCASE IN PATIO - Casa de Pio Pico, Whittier Boulevard & Guirado Street, Whittier, Los Angeles County, CA

  15. 5. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW OF PATIO FROM THE SOUTHWEST - Casa de Pio Pico, Whittier Boulevard & Guirado Street, Whittier, Los Angeles County, CA

  16. 3. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW FROM THE NORTHWEST - Casa de Pio Pico, Whittier Boulevard & Guirado Street, Whittier, Los Angeles County, CA

  17. 2. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW FROM THE NORTHEAST - Casa de Pio Pico, Whittier Boulevard & Guirado Street, Whittier, Los Angeles County, CA

  18. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 NORTH CLOISTER OF LIVING QUARTERS - Mission San Juan Capistrano, Living Quarters, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  19. 5. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 NORTH CLOISTER OF LIVING QUARTERS - Mission San Juan Capistrano, Living Quarters, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  20. 1. Henry Beardsley standing in front of his store in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Henry Beardsley standing in front of his store in Ohio. Photographer unknown, 1887. Source: William M. Beardsley - Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoenix, Maricopa County, AZ

  1. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey May, 1937 BARRACKS BUILDING #2 (SOUTH SECTION) NORTH AND EAST FRONTS - Fort Tejon, Barracks Number Two, Highway 99, Lebec, Kern County, CA

  2. 1. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19, 1934. VIEW FROM THE SOUTHWEST - Pioneer House of the Mother Colony, 414 North West Street (moved from North Los Angeles Street), Anaheim, Orange County, CA

  3. 2. Historic American Buildings Survey, Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW FROM THE NORTHWEST - Pioneer House of the Mother Colony, 414 North West Street (moved from North Los Angeles Street), Anaheim, Orange County, CA

  4. 3. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 GUEST HOUSE, NORTH WALL AND CLOISTER - Mission San Juan Capistrano, Guest House, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  5. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 GUEST HOUSE (OR BARRACKS), SOUTHEAST CORNER - Mission San Juan Capistrano, Guest House, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  6. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 NORTH ELEVATION OF GUEST HOUSE - Mission San Juan Capistrano, Guest House, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  7. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 SOUTH ENTRANCE RO GUEST HOUSE. - Mission San Juan Capistrano, Guest House, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  8. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 MONASTERY GENERAL VIEW FROM SOUTHEAST. - Mission San Luis Obispo de Tolosa, Monastery, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  9. 7. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 DETAIL OF DOOR TO SACRISTRY (EXTERIOR) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  10. 3. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 GENERAL VIEW OF CHURCH AND LIVING QUARTERS FROM GARDEN. - Mission San Luis Obispo de Tolosa, Monastery, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  11. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 NORTH ELEVATION OF CHURCH - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  12. 6. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 DETAIL OF CHURCH LOGGIA (NORTH ELEVATION, EXTERIOR) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  13. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 EAST ELEVATION OF CHURCH (FRONT) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  14. 10. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 Church Nave (General view) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  15. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 GARDEN SIDE OF LIVING QUARTERS (WEST AND CHURCH SOUTH) - Mission San Luis Obispo de Tolosa, Monastery, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  16. 5. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 MAIN ENTRANCE DOOR TO CHURCH (EAST FRONT) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  17. 8. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 SACRISTRY WINDOW, NORTH ELEVATION (EXTERIOR) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  18. 9. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 CHURCH NAVE (GENERAL VIEW) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  19. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 MONASTERY GENERAL VIEW FROM NORTHEAST (EAST FRONT) - Mission San Luis Obispo de Tolosa, Monastery, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  20. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 SOUTH ELEVATION OF CHURCH FROM EAST END - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  1. 3. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 SOUTH ELEVATION OF CHURCH FROM WEST END - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA

  2. Guy V. Henry: A Study in Military Leadership

    DTIC Science & Technology

    1985-05-13

    off, and some water had cleared his throat, he was asked the somewhat absurd question of how he felt. ’ Bully ,’ was his somewhat unexpected reply. ’Never... suicide to avoid capture. In another article reporting the alleged massacre, the correspondent asserted that, knowing Henry, he believed the Major...close to his youngest son William Seton Henry. Seton, as he was called, was five years younger than Guy, Jr. and was still a teenager when his father

  3. Fighting desires: Henry Miller's Queer Tropic.

    PubMed

    Hardin, Michael

    2002-01-01

    "Fighting Desires: Henry Miller's Queer Tropic" is an investigation of Tropic of Cancer that investigates the deeply repressed homoerotic desire that periodically surfaces. This reading is dependent upon an interpretation of Eve Sedgwick that proposes male sexuality as a continuum. By looking at the nature of the male-male relationships, as well as the lack of emotion and presence in the male-female relationships, I will show that the most intimate relationships are between men, and that these relationships are expressed through the telling of stories about (heterosexual) sex; this is the function of women within the novel: one has sex with a woman, not for the pleasure that the act brings, but for the pleasure that the recounting of the story to other men brings. Furthermore, I will look at Miller's use of puns within the novel and how they also contribute to a homoerotic reading. None of this is to argue that Miller was not homophobic and sexist--Miller very clearly was--the purpose of this essay is to show the complex nature of sexuality, even within a protagonist who asserts a very defined heterosexuality.

  4. James Paget Henry--a retrospective.

    PubMed

    Meehan, J P; Meehan, W P

    1997-01-01

    James Paget Henry really began his productive research career at the outset of the second world war. His studies of acceleration and the anoxia of high altitude were supported by the development of then new techniques of measuring and recording critical physiologic parameters such as vascular pressures, respiratory functions and haemoglobin saturation. His inquisitive mind made productive use of the instruments that had to be made by skilled instrument makers working in university shops. Much of this instrumentation has now found its way into the clinical arena where it is now the main armamentarium of cardiac diagnostic and respiratory function laboratories. His work in the space program preceeded that of the Russians but did not get recognition until Sputnik awakened the world to the possibilities of space flight. His development of the concept of a cardiovascular basis for fluid volume control and the supportive investigative work undertaken constitute a milestone in the annals of experimental physiology. The chimpanzees used in Project Mercury were found to be hypertensive which was related to the method of capture used by the commercial suppliers. This lead Jim to study the effect of early experience on resting blood pressure, an effort that soon developed into provocative studies of the biological basis of the stress response.

  5. Victor Henri: 111 years of his equation.

    PubMed

    Cornish-Bowden, Athel; Mazat, Jean-Pierre; Nicolas, Serge

    2014-12-01

    Victor Henri's great contribution to the understanding of enzyme kinetics and mechanism is not always given the credit that it deserves. In addition, his earlier work in experimental psychology is totally unknown to biochemists, and his later work in spectroscopy and photobiology almost equally so. Applying great rigour to his analysis he succeeded in obtaining a model of enzyme action that explained all of the observations available to him, and he showed why the considerable amount of work done in the preceding decade had not led to understanding. His view was that only physical chemistry could explain the behaviour of enzymes, and that models should be judged in accordance with their capacity not only to explain previously known facts but also to predict new observations against which they could be tested. The kinetic equation usually attributed to Michaelis and Menten was in reality due to him. His thesis of 1903 is now available in English. Copyright © 2014 Elsevier B.V. and Société française de biochimie et biologie Moléculaire (SFBBM). All rights reserved.

  6. Henry, where have you lost your Self?

    PubMed

    Philippi, Nathalie; Roquet, Daniel; Ben Malek, Hédi; Noblet, Vincent; Botzung, Anne; Cretin, Benjamin; Blanc, Frédéric

    2017-10-01

    The Self is a complex construct encompassing distinct components, including episodic and semantic autobiographical memory, the Self-concept, and the subjective sense of Self, which highest level consists of Self-awareness. The neuro-anatomical correlates are complex, and it is debated as to whether a common region could support these different components of the Self, with a particular interest for the cortical midline structures and the medial prefrontal cortex (MPFC). Alzheimer's disease (AD) constitutes an interesting model for the study of Self as autobiographical memory typically deteriorates as the disease progresses. Here, we report the unexpected case of Henry, a patient with MCI due to AD who was unable to produce any personal autobiographical memories, nor describe his Self-concept, had a poor personal semantic memory, and disclosed unusual anosognosia for this stage of the disease. His cognitive performance was compared to a group of matched AD patients and a group of healthy controls confirming that the main components of his Self were degraded. We hypothesized that it was due to a marked atrophy within the cortical midline, as visually assessed on his MRI. We further elucidated these findings through Voxel-based morphometry analysis, which confirmed a significant atrophy of the MPFC that was specific to this patient. Moreover, this revealed significant atrophy within the bilateral insular cortex. Given the stage of the disease, the degradation of the Self is unlikely to be accounted for by deficient mnemonic processes, especially as the presence of discrete temporal atrophy was noted. We suggest that this specific pattern of MPFC and insular atrophy is responsible for the systematic collapse of the patient's Self, through the breakdown of the subjective sense of Self, which is proposed as a prerequisite to all other components, according to the model proposed by Prebble, Addis, and Tippett (2013). Copyright © 2017 Elsevier Ltd. All rights reserved.

  7. Science Advisor and Applied Physicist: Joseph Henry Serves His Country

    NASA Astrophysics Data System (ADS)

    Rothenberg, Marc

    1997-04-01

    When Joseph Henry accepted the postion of secretary of the Smithsonian in 1846, his career changed radically. Although he never ceased thinking of himself as a research scientist and educator, thereafter his chief roles were those of science administrator and advisor to both the executive and legislative branches of the federal government for both science and technology. His effectiveness as an advocate became more important than his skill as an experimental physicist. Even when he entered the laboratory, his role had changed. No longer was he concerned with basic research. As a member of various government boards and committees, Henry spent the last three decades of his life concerned with the application of fundamental knowledge for the improvement of the human condition. This paper will discuss Henry's service on behalf of his country.

  8. 4. PHOTOGRAPHIC PORTRAIT OF HENRY OSSAWA TANNER Photocopy of pre1930 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. PHOTOGRAPHIC PORTRAIT OF HENRY OSSAWA TANNER Photocopy of pre-1930 photograph, courtesy of Archives of American Art, Smithsonian Institution, Washington, D. C. - Henry O. Tanner House, 2908 West Diamond Street, Philadelphia, Philadelphia County, PA

  9. Henry Giroux on Democracy Unsettled: From Critical Pedagogy to the War on Youth--An Interview

    ERIC Educational Resources Information Center

    Peters, Michael A.

    2012-01-01

    This interview conducted with Henry Giroux begins by probing Henry's childhood, upbringing and undergraduate years to discover where his sense of social justice took hold. It also questions Henry about his working-class background and the major influences on his thought, including his relationships with Paulo Freire and Howard Zinn. The interview…

  10. Henry Giroux on Democracy Unsettled: From Critical Pedagogy to the War on Youth--An Interview

    ERIC Educational Resources Information Center

    Peters, Michael A.

    2012-01-01

    This interview conducted with Henry Giroux begins by probing Henry's childhood, upbringing and undergraduate years to discover where his sense of social justice took hold. It also questions Henry about his working-class background and the major influences on his thought, including his relationships with Paulo Freire and Howard Zinn. The interview…

  11. Universe of constant

    NASA Astrophysics Data System (ADS)

    Yongquan, Han

    2016-10-01

    The ideal gas state equation is not applicable to ordinary gas, it should be applied to the Electromagnetic ``gas'' that is applied to the radiation, the radiation should be the ultimate state of matter changes or initial state, the universe is filled with radiation. That is, the ideal gas equation of state is suitable for the Singular point and the universe. Maybe someone consider that, there is no vessel can accommodate radiation, it is because the Ordinary container is too small to accommodate, if the radius of your container is the distance that Light through an hour, would you still think it can't accommodates radiation? Modern scientific determinate that the radius of the universe now is about 1027 m, assuming that the universe is a sphere whose volume is approximately: V = 4.19 × 1081 cubic meters, the temperature radiation of the universe (cosmic microwave background radiation temperature of the universe, should be the closest the average temperature of the universe) T = 3.15k, radiation pressure P = 5 × 10-6 N / m 2, according to the law of ideal gas state equation, PV / T = constant = 6 × 1075, the value of this constant is the universe, The singular point should also equal to the constant Author: hanyongquan

  12. Henry Norris Russell Lecture: Thinking and Computing

    NASA Astrophysics Data System (ADS)

    Arnett, David

    2013-01-01

    Computers have become powerful conceptual and intellectual tools. Examples will be given showing how computer simulations clarified the nature of some important astrophysical processes: gravitational collapse to black holes or neutron stars, the synthesis of the elements, supernova explosions, and turbulent motion in stars. Originally computers were thought of as tools for solving differential equations by numerical integration, but modern use of computers more closely resembles the construction of a digital model of reality based on conservation laws. Implications of our new abilities to solve nonlinear problems, and the synergism developing between analytic and digital theory will be discussed, with historical comments.

  13. Driving into the Heart of Henry Giroux's Pedagogy.

    ERIC Educational Resources Information Center

    Rhodes, Keith

    1996-01-01

    Muses on the power and intelligence of Henry Giroux as a composition theorist and pedagogue. Recounts Giroux's presentation at the 1993 Penn State Conference on Rhetoric and Composition and his categorizing of the "power dynamics" present at most institutions. Opts for "expressivist" pedagogy. (PA)

  14. The Hope of Radical Education: A Conversation with Henry Giroux.

    ERIC Educational Resources Information Center

    Journal of Education, 1988

    1988-01-01

    Radical education is questioning institutions and assumptions about education. An interview presents ideas of the spokesperson, Henry Giroux. They include the following: (1) traditional thinkers have the wrong perception of education; (2) education should engender empowerment; (3) radical education goes beyond a Marxist perspective; and (4)…

  15. Patrick Henry Community College Community Needs Assessment: Comprehensive Report.

    ERIC Educational Resources Information Center

    Needham, Roberta Lee

    An impact study/needs assessment of the Patrick Henry Community College (PHCC) service area was conducted as the informational base for PHCC's 3-year plan. Five groups were surveyed to gather demographic data and information on educational needs: 295 randomly selected citizens, 71 selected employers, 14 selected social service agency leaders, 40…

  16. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 VIEW OF MISSION VALLEY AND THE MISSION (LOOKING EAST FROM PRESIDIO HILL AT OLD TOWN, ORIGINAL SITE OF FIRST MISSION. - Mission San Diego de Alcala, Misson Valley Road, San Diego, San Diego County, CA

  17. The Transformative Intellectual: An Examination of Henry Giroux's Ethics

    ERIC Educational Resources Information Center

    Kashani, Tony

    2012-01-01

    This article explores Henry Giroux's contributions to critical pedagogy. The author demonstrates how Giroux, as a public intellectual, has found his Ethics in the right place. The author further argues that Giroux's Ethics of virtue are present not only in the public person but also in his transformative writing.

  18. America's Earliest Revolutionary Voice: Po-Pay--Not Patrick Henry.

    ERIC Educational Resources Information Center

    Owen, Gordon R.

    A full century before Patrick Henry's persuasive battle for the rights of oppressed people, a San Juan Pueblo Indian medicine man known only as Po-Pay was the masterful communicator and agitator who orchestrated the first American revolution to drive the Spanish back into Mexico. Seeking mineral wealth, cheap labor, and the maximum number of…

  19. Patrick Henry Community College Institutional Master Plan, 1987-1992.

    ERIC Educational Resources Information Center

    Williams, Jean; And Others

    Patrick Henry Community College's (PHCC's) 1987-1992 institutional master plan was developed to inform readers of the college's mission, goals, history, current status, and plans for the future. Section 1 presents a description of the college and projections for the future in terms of: (1) PHCC's contributions to the community, such as its…

  20. The Failed Educations of John Stuart Mill and Henry Adams.

    ERIC Educational Resources Information Center

    Crossley, Robert

    1979-01-01

    Analyzes and contrasts Mill's "Autobiography" and Adams'"The Education of Henry Adams" in order to present two approaches to the nature of education and of failure. Maintains that their perspectives may serve as catalysts and cautions for contemporary theories of education and its utility and relevance. (CAM)

  1. The Hope of Radical Education: A Conversation with Henry Giroux.

    ERIC Educational Resources Information Center

    Journal of Education, 1988

    1988-01-01

    Radical education is questioning institutions and assumptions about education. An interview presents ideas of the spokesperson, Henry Giroux. They include the following: (1) traditional thinkers have the wrong perception of education; (2) education should engender empowerment; (3) radical education goes beyond a Marxist perspective; and (4)…

  2. Lou Henry Hoover: The Independent Girl. A Curriculum Guide.

    ERIC Educational Resources Information Center

    Kurtz, Alice K.

    This curriculum guide provides ideas for teaching about Lou Henry Hoover, wife of President Herbert Hoover. The book examines personal data, as well as the social milieu of the times of the Hoover's. Teaching suggestions accompany the chapters. There are 12 chapters in the guide: (1) "Timeline, Biographical Sketch, and Photographs of Lou…

  3. The Transformative Intellectual: An Examination of Henry Giroux's Ethics

    ERIC Educational Resources Information Center

    Kashani, Tony

    2012-01-01

    This article explores Henry Giroux's contributions to critical pedagogy. The author demonstrates how Giroux, as a public intellectual, has found his Ethics in the right place. The author further argues that Giroux's Ethics of virtue are present not only in the public person but also in his transformative writing.

  4. A Conservation with...Henry Louis Gates, Jr.

    ERIC Educational Resources Information Center

    Cheney, Lynne V.

    1991-01-01

    Presents an interview between National Endowment for the Humanities chairman, Lynne V. Cheney, and Harvard professor, Henry Louis Gates, Jr. Includes discussion of multiculturalism as it relates to free speech, sexism, racism, hate speech, and ethnocentrism. Emphasizes both the open tradition of Western culture and the recent pressure for…

  5. The Failed Educations of John Stuart Mill and Henry Adams.

    ERIC Educational Resources Information Center

    Crossley, Robert

    1979-01-01

    Analyzes and contrasts Mill's "Autobiography" and Adams'"The Education of Henry Adams" in order to present two approaches to the nature of education and of failure. Maintains that their perspectives may serve as catalysts and cautions for contemporary theories of education and its utility and relevance. (CAM)

  6. Lagrangian circulation study near Cape Henry, Virginia. [Chesapeake Bay

    NASA Technical Reports Server (NTRS)

    Johnson, R. E.

    1981-01-01

    A study of the circulation near Cape Henry, Virginia, was made using surface and seabed drifters and radar tracked surface buoys coupled to subsurface drag plates. Drifter releases were conducted on a line normal to the beach just south of Cape Henry. Surface drifter recoveries were few; wind effects were strongly noted. Seabed drifter recoveries all exhibited onshore motion into Chesapeake Bay. Strong winds also affected seabed recoveries, tending to move them farther before recovery. Buoy trajectories in the vicinity of Cape Henry appeared to be of an irrotational nature, showing a clockwise rotary tide motion. Nearest the cape, the buoy motion elongated to almost parallel depth contours around the cape. Buoy motion under the action of strong winds showed that currents to at least the depth of the drag plates substantially are altered from those of low wind conditions near the Bay mouth. Only partial evidence could be found to support the presence of a clockwise nontidal eddy at Virginia Beach, south of Cape Henry.

  7. 7. Historic American Buildings Survey Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey Photographed by Henry F. Withey, MaY 1937 SHOP RUINS (DETAIL OF SOAP OVEN) - Mission San Juan Capistrano, Industrial Shops, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  8. 6. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY & SMITHY (FROM S. E. END OF SOAP FACTORY) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

  9. A Teacher's Guide for William Shakespeare's "Henry V."

    ERIC Educational Resources Information Center

    WGBH-TV, Boston, MA.

    This teacher's guide for William Shakespeare's play "Henry V" is designed to accompany the Kenneth Branagh Masterpiece Theater film production of the play, and to help teachers use the film in a variety of ways. The guide includes pre-viewing background information, five teaching units, and a pullout poster for classroom display. The…

  10. George Henry Hepting: Pioneer Leader in Forest Pathology

    Treesearch

    Ellis B. Cowling; Arthur Kelman; Harry R. Powers

    1999-01-01

    George Henry Hepting grew up in the city environment of Brooklyn, but early in his life developed a deep love and scientific interest in forestry. He became America's most skilled scientist in the theory and practice of forest pathology. He studied how long-lived forest trees, unlike most plants, cope with the long-term changes in their biological, physical, and...

  11. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey June, 1936 INTERSECTION OF SOUTH CLOISTER OF LIVING QUARTERS WITH WEST CLOISTER OF PADRES HOUSE. - Mission San Juan Capistrano, Living Quarters, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  12. 3. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 WEST END OF SOUTH CLOISTER TO LIVING QUARTERS - Mission San Juan Capistrano, Living Quarters, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  13. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey June 1936 SOUTH CLOISTER, OF LIVING QUARTERS FROM WEST END. - Mission San Juan Capistrano, Living Quarters, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

  14. The Henry semianalytical solution for saltwater intrusion with reduced dispersion

    NASA Astrophysics Data System (ADS)

    Zidane, Ali; Younes, Anis; Huggenberger, Peter; Zechner, Eric

    2012-06-01

    The Henry semianalytical solution for salt water intrusion is widely used for benchmarking density dependent flow codes. The method consists of replacing the stream function and the concentration by a double set of Fourier series. These series are truncated at a given order and the remaining coefficients are calculated by solving a highly nonlinear system of algebraic equations. The solution of this system is often subject to substantial numerical difficulties. Previous works succeeded to provide semianalytical solutions only for saltwater intrusion problems with unrealistic large amount of dispersion. In this work, different truncations for the Fourier series are tested and the Levenberg-Marquardt algorithm, which has a quadratic rate of convergence, is applied to calculate their coefficients. The obtained results provide semianalytical solutions for the Henry problem in the case of reduced dispersion coefficients and for two freshwater recharge values: the initial value suggested by Henry (1964) and the reduced one suggested by Simpson and Clement (2004). The developed semianalytical solutions are compared against numerical results obtained by using the method of lines and advanced spatial discretization schemes. The obtained semianalytical solutions improve considerably the worthiness of the Henry problem and therefore, they are more suitable for testing density dependent flow codes.

  15. Battling for Liberty: Tecumseh's and Patrick Henry's Language of Resistance.

    ERIC Educational Resources Information Center

    Gardner, Traci

    The reading program described in this lesson plan extends the study of Patrick Henry's "Give Me Liberty or Give Me Death" speech to demonstrate the ways Native Americans also resisted oppression through rhetoric. During five 50-minute lessons, students will: develop an awareness of both Native and non-Native movements to resist…

  16. Portrait of a confederate secret agent: Henry A. Parr, DDS.

    PubMed

    Hyson, J M; Swanson, B Z

    1996-07-01

    Dr. Henry Albert Parr wore many faces during his career beginning with his Civil War service as a Confederate secret service agent and ending as a presidential dentist. How he played the roles in between as a pirate, accused murderer, pharmacist, inventor, and dental educator is a real odyssey--and worthy of documentation.

  17. America's Earliest Revolutionary Voice: Po-Pay--Not Patrick Henry.

    ERIC Educational Resources Information Center

    Owen, Gordon R.

    A full century before Patrick Henry's persuasive battle for the rights of oppressed people, a San Juan Pueblo Indian medicine man known only as Po-Pay was the masterful communicator and agitator who orchestrated the first American revolution to drive the Spanish back into Mexico. Seeking mineral wealth, cheap labor, and the maximum number of…

  18. Challenging Texts: Teaching Deliberately--Reading Henry David Thoreau's "Walden"

    ERIC Educational Resources Information Center

    Davis, Andrea

    2011-01-01

    One of the more difficult 19th-century American texts for high school students to read is undoubtedly Henry David Thoreau's "Walden." His erudite allusions, often page-long sentences, and sophisticated sense of the ironic initially leave many students cold. Still, the author encourages them to read amid the din of a cultural cacophony that shouts…

  19. Henry David Thoreau and Martin Luther King, Jr. Lesson Plan.

    ERIC Educational Resources Information Center

    Powell, Brent

    1995-01-01

    Presents a five-lesson, high school instructional unit on the ideas and activities of Henry David Thoreau and Martin Luther King, Jr. Includes student objectives, step-by-step instructional procedures, and discussion questions. Provides quotations by Thoreau and King. (CFR)

  20. Challenging Texts: Teaching Deliberately--Reading Henry David Thoreau's "Walden"

    ERIC Educational Resources Information Center

    Davis, Andrea

    2011-01-01

    One of the more difficult 19th-century American texts for high school students to read is undoubtedly Henry David Thoreau's "Walden." His erudite allusions, often page-long sentences, and sophisticated sense of the ironic initially leave many students cold. Still, the author encourages them to read amid the din of a cultural cacophony that shouts…

  1. 15. Photocopy of map, drawn by Henry Hagey, circa 1900 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of map, drawn by Henry Hagey, circa 1900 (from Willing Inhabitants, original in possession of author, Joyce Munro). FRANCONIA TOWNSHIP MAP. BRIDGE LOCATION IN BOTTOM CENTER - Allentown Road Bridge, Spanning Skippack Creek on Allentown Road, Franconia, Montgomery County, PA

  2. 10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST SIDE ELEVATION Restricted: Permission for use must be obtained in writing from the Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Willis Bristol House, 584 Chapel Street, New Haven, New Haven County, CT

  3. 4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. 1845 Restricted: Permission for use must be obtained in writing from Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Grove Street Cemetery Entrance, 227 Grove Street, New Haven, New Haven County, CT

  4. Marshak waves: Constant flux vs constant T-a (slight) paradigm shift

    SciTech Connect

    Rosen, M.D.

    1994-12-22

    We review the basic scaling laws for Marshak waves and point out the differences in results for wall loss, albedo, and Marshak depth when a constant absorbed flux is considered as opposed to a constant absorbed temperature. Comparisons with LASNEX simulations and with data are presented that imply that a constant absorbed flux is a more appropriate boundary condition.

  5. Australian Family Research Conference Proceedings (Canberra, Australia, November 23-25, 1983). Volume II: Family Law.

    ERIC Educational Resources Information Center

    Institute of Family Studies, Melbourne (Australia).

    Second in a series of seven volumes containing the proceedings of the 1983 Australian Family Research Conference, this publication deals with family law. Papers and authors included are: "Attitudes of Divorced Men and Women to the Family" (Margaret Harrison), "Dispute Resolution in Australian Family Law" (Henry Finlay),…

  6. Australian Family Research Conference Proceedings (Canberra, Australia, November 23-25, 1983). Volume II: Family Law.

    ERIC Educational Resources Information Center

    Institute of Family Studies, Melbourne (Australia).

    Second in a series of seven volumes containing the proceedings of the 1983 Australian Family Research Conference, this publication deals with family law. Papers and authors included are: "Attitudes of Divorced Men and Women to the Family" (Margaret Harrison), "Dispute Resolution in Australian Family Law" (Henry Finlay),…

  7. Is decay constant?

    PubMed

    Pommé, S; Stroh, H; Altzitzoglou, T; Paepen, J; Van Ammel, R; Kossert, K; Nähle, O; Keightley, J D; Ferreira, K M; Verheyen, L; Bruggeman, M

    2017-09-07

    Some authors have raised doubt about the invariability of decay constants, which would invalidate the exponential-decay law and the foundation on which the common measurement system for radioactivity is based. Claims were made about a new interaction - the fifth force - by which neutrinos could affect decay constants, thus predicting changes in decay rates in correlation with the variations of the solar neutrino flux. Their argument is based on the observation of permille-sized annual modulations in particular decay rate measurements, as well as transient oscillations at frequencies near 11 year(-1) and 12.7 year(-1) which they speculatively associate with dynamics of the solar interior. In this work, 12 data sets of precise long-term decay rate measurements have been investigated for the presence of systematic modulations at frequencies between 0.08 and 20 year(-1). Besides small annual effects, no common oscillations could be observed among α, β(-), β(+) or EC decaying nuclides. The amplitudes of fitted oscillations to residuals from exponential decay do not exceed 3 times their standard uncertainty, which varies from 0.00023 % to 0.023 %. This contradicts the assertion that 'neutrino-induced' beta decay provides information about the deep solar interior. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

  8. Geology and geography of the Henry Mountains region, Utah

    USGS Publications Warehouse

    Hunt, Charles B.; Averitt, Paul; Miller, Ralph L.

    1953-01-01

    The Henry Mountains region in southeastern Utah is one of the classic areas in geology because of the study made there by Grove Karl Gilbert in 1875 and 1876. His report on the geology of the mountains was the first to recognize that intrusive bodies may deform their host rocks and the first to show clearly the significance of the evenly eroded plains, now known as pediments, at the foot of desert mountains.The Henry Mountains with the surrounding structural basin is a rugged, dry, and sparsely settled region, a part of the Colorado Plateaus province. The natural obstacles of the region-the aridity and ruggedness-have kept it primitive. It has not been penetrated by modern methods of transportation and thus it persists as a roadless frontier. Even the Indians seem to have made little use of the region; explorers did not enter it until 1869 and settlements were not started until the eighties.

  9. In praise of the literary eponym—Henry V sign

    PubMed Central

    Houlihan, C.; Marks, J. Charles

    2013-01-01

    The use of eponyms in medicine is often discouraged. However, the literary eponym should be an exception as it is not linked with many of the difficulties associated with conventional eponyms and offers descriptive brevity and accuracy. Here, we illustrate the point with Henry V sign, which will be familiar to many who have cared for patients in the terminal stage of illness. PMID:23108030

  10. Henri Rouvière (1876-1952) French anatomist.

    PubMed

    Romero-Reverón, Rafael

    2014-01-01

    Henri Rouvière (1876-1952): medical doctor and professor of human anatomy at Paris University and Honorary Member of the French Academy of Medicine. He wrote important essays on human anatomy and related topics, including a Compendium of Anatomy and Dissection (1911), A Treatise on Descriptive, Topographical and Functional Anatomy (1921), an anatomy of the human lymphatic system (1932), General Anatomy, Original Forms and Anatomical Structures (1939).

  11. W. Henry Robinson: Popularising astronomy in Victorian Walsall and Birmingham

    NASA Astrophysics Data System (ADS)

    Williams, S.

    William Henry Robinson was one of the most prominent citizens of Walsall, then part of Staffordshire, in the Victorian and Edwardian periods. An influential businessman, he managed to combine printing, publishing, editing a newspaper, writing books and poetry, maintaining a library and retail trading with founding the town's literary institute, and bringing the scientists, explorers, authors and cultural pursuits of the day to his home town. An amateur astronomer in his own right, Robinson was instrumental in setting up the BAA's Midland Branch.

  12. Sarcophilia, cremation and Sir Henry Thompson (1820-1904).

    PubMed

    Jellinek, E H

    2009-11-01

    Sarcophilia, a neologism for an attachment to human remains, is set in a review of the history of the disposal of the dead. The ancient practice of cremation was relaunched late in the 19th century by the urological surgeon cum social reformer Sir Henry Thompson. He was stimulated by Edwin Chadwick and Charles Dickens, and by Charles Darwin's observations on the earthworm. Sarcophilia is the reason for the controversial Human Tissue Act of 2004.

  13. The early education of a Nobel laureate: Henry Dale's schooldays.

    PubMed

    Tansey, E M

    2011-12-20

    This paper examines the early schooling, in London and in Cambridge, of the later Nobel laureate and President of the Royal Society, the physiologist Sir Henry Dale (1875-1968). The influence of key teachers who directed the boy's interest towards science, and the impact of his schooling on his university education and later scientific career, are examined in particular. The significance of the zoologist Edward Butler of Tollington Park College, who taught Dale in his early teenage years, is highlighted.

  14. BOOK REVIEW: Joseph Henry: The Rise of an American Scientist

    NASA Astrophysics Data System (ADS)

    Crawford, Elspeth

    1998-09-01

    Albert Moyer has clearly done his research into the events of Joseph Henry's life. The personal, professional, sociological and scientific aspects have been meticulously detailed throughout and the ordering, as in the chapter headings, is chronological, so that there is some element of each of these aspects in each chapter. This is unfortunately both the strength and the weakness of the biography, as the detail seemed to me to be the most remarkable characteristic of the writing. But, the bigger stories, or the themes, which might have been possible, seemed to get lost. Hence, I found this a book for those who are seriously interested in Joseph Henry; but for those whose interest might be more general, say having an interest in nineteenth century growth of scientific institutions, or wanting to understand the conceptual development of electromagnetism, there seemed to be too much which came from the Henry point of view, rather than locating Henry within his time and context. This is a remark about style, rather than omission of content, as the myriad of details in each paragraph certainly inform the reader about the context. For instance, some sociology of the USA in the nineteenth century could be inferred, say showing how a young man from a modest background might make his way into a professional life, but the information is so particularly a description of Henry's experience that one has to rely on prior knowledge or make assumptions in order to create a sociological perspective. That is, I now know, what happened to Henry, but I do not know if his case was in any sense typical or atypical. Similarly there is information about education in general at that time, and scientific education, research and its publication, as it applied to Henry. The relationships between science in the USA and in Europe have a place, and there is quite a bit of information about the institutions in which Henry worked, particularly Albany Academy, Princeton and the Smithsonian. Henry

  15. Reconstructing Henry: Or, Why Everything You Needed to Know about Wilderness Philosophy You Could Have Learned from Henry David Thoreau

    ERIC Educational Resources Information Center

    Glover, Jim

    2006-01-01

    Henry David Thoreau has gotten a bad rap lately. He's been pigeon-holed as a "romantic" by resource managers who do not have a tiny fragment of his wisdom and don't know anything about him. He's been accused of hypocrisy because his cabin at Walden Pond was not, after all, very remote. His wilderness trips, in this age of fly-in mountaineering,…

  16. Reconstructing Henry: Or, Why Everything You Needed to Know about Wilderness Philosophy You Could Have Learned from Henry David Thoreau

    ERIC Educational Resources Information Center

    Glover, Jim

    2006-01-01

    Henry David Thoreau has gotten a bad rap lately. He's been pigeon-holed as a "romantic" by resource managers who do not have a tiny fragment of his wisdom and don't know anything about him. He's been accused of hypocrisy because his cabin at Walden Pond was not, after all, very remote. His wilderness trips, in this age of fly-in mountaineering,…

  17. Varying Constants, Gravitation and Cosmology.

    PubMed

    Uzan, Jean-Philippe

    2011-01-01

    Fundamental constants are a cornerstone of our physical laws. Any constant varying in space and/or time would reflect the existence of an almost massless field that couples to matter. This will induce a violation of the universality of free fall. Thus, it is of utmost importance for our understanding of gravity and of the domain of validity of general relativity to test for their constancy. We detail the relations between the constants, the tests of the local position invariance and of the universality of free fall. We then review the main experimental and observational constraints that have been obtained from atomic clocks, the Oklo phenomenon, solar system observations, meteorite dating, quasar absorption spectra, stellar physics, pulsar timing, the cosmic microwave background and big bang nucleosynthesis. At each step we describe the basics of each system, its dependence with respect to the constants, the known systematic effects and the most recent constraints that have been obtained. We then describe the main theoretical frameworks in which the low-energy constants may actually be varying and we focus on the unification mechanisms and the relations between the variation of different constants. To finish, we discuss the more speculative possibility of understanding their numerical values and the apparent fine-tuning that they confront us with.

  18. AdaMeasure: An Implementation of the Halstead and Henry Metrics.

    DTIC Science & Technology

    1987-06-01

    recursive descent parser. Each function is preceded -- by the grammar productions they are implementing. with PARSER 2, PARSER 3. HENRY GLOBAL...by the grammar productions they are implementing. with PARSER 4. HENRY GLOBAL. HENRY, BYPASS FUNCTION. HALSTEAD METRIC, GLOB3AL PARSER. GLOBAL, TEXT...are the lowest level productions for our top-down. -- recursive descent parser. Each function is preceded -- by the grammar productions they are

  19. [From apprenticeship to Nobel Prize: Henri Moissan's fabulous destiny].

    PubMed

    Lafont, O

    2008-01-01

    Born in Paris on September 28, 1852, son of an eastern railways' employee and of a dressmaker, Henri Moissan's secondary schooling in Meaux did not allow him to get access to the sesame diploma "baccalauréat" (GCE). In 1869, he did obtain a special certificate of secondary schooling so that he could become an apprentice in watch making. That could have been the end of the story, but dreadful event for France appeared to have beneficial effects for Moissan. Under the threat of the Prussian army, Moissan's family took refuge near Paris. This gave the young Henri the opportunity to register as a student for the second-class pharmacy diploma, which did not need, at the time, the GCE. Moissan became then a trainee in pharmacy in 1871. Meanwhile, he followed the special schooling of "Ecole de chimie" founded by E. Frémy, and then joined the laboratory of Dehérain at the Museum, where he worked in plant physiology. He finally obtained the famous "baccalauréat" (GCE) and could register as a student in first-class pharmacy. He became a pharmacist as well as a doctor in sciences. In 1883, Moissan was named professor at the school of pharmacy in Paris. In 1886, he isolated fluorine by electrolysis of fluorhydric acid, in the presence of potassium fluoride, at a low temperature. He then studied diamond synthesis and gave a start to high temperature chemistry, designing his famous furnace. These findings and many others allowed Moissan to rise to membership in many learned academies around the world. Crowning achievement, Moissan won the Nobel Prize in 1906. A man of culture, collector of autographs and paintings, he died in 1907. Nothing of that would have been possible if there had not been a second-class pharmacist diploma. The history of Henri Moissan is one of a rise from apprenticeship to the Nobel Prize.

  20. Hugh Henry Bentall, a pioneer of cardiovascular surgery

    PubMed Central

    Thiene, Gaetano

    2014-01-01

    Hugh Henry Bentall, the inventor of the surgical procedure that enabled concomitant replacement of the aortic valve and ascending aorta, died on September 2012 at the age of 92. He was the first Professor of Cardiothoracic Surgery in the United Kingdom, at the Hammersmith Hospital, and carried out the first open-heart operations with a heart-lung machine in London in 1953. Besides cardiac surgery, he paid particular attention to cardiac anatomy and embryology, which he enriched even following retirement. He leaves three sons and a daughter. PMID:24368549

  1. Henri Ey's neojacksonism and the psychopathology of disintegrated mind.

    PubMed

    Farina, Benedetto; Ceccarelli, Maurizio; Di Giannantonio, Massimo

    2005-01-01

    The French psychiatrist Henri Ey developed his organo-dynamic theory of the mind function and consciousness 50 years ago incorporating Hughling Jackson's thinking, along with psychiatric and philosophical theorizations by Janet and Bergson. This model has not received the attention it deserved, but recent advances in neuroscience rekindled interest for Ey's theory. By overcoming the Cartesian mind-body dualism and treating the mind-body unit as an inseparable whole, this model opens the way for the integrated treatment of mental disorders. Ey's conceptualization of consciousness as being simultaneously both synchronous and diachronic anticipates current theories of consciousness (Damasio, Edelman, Mesulam).

  2. Henri Bénard: Thermal convection and vortex shedding

    NASA Astrophysics Data System (ADS)

    Wesfreid, José Eduardo

    2017-07-01

    We present in this article the work of Henri Bénard (1874-1939), a French physicist who began the systematic experimental study of two hydrodynamic systems: the thermal convection of fluids heated from below (the Rayleigh-Bénard convection and the Bénard-Marangoni convection) and the periodical vortex shedding behind a bluff body in a flow (the Bénard-Kármán vortex street). Across his scientific biography, we review the interplay between experiments and theory in these two major subjects of fluid mechanics.

  3. Henry Cavendish, Johann von Soldner, and the deflection of light

    NASA Astrophysics Data System (ADS)

    Will, Clifford M.

    1988-05-01

    The gravitational deflection of light based on Newtonian theory and the corpuscular model of light was calculated, but never published, around 1784 by Henry Cavendish, almost 20 years earlier than the first published calculation by Johann Georg von Soldner. The two results are slightly different because, while Cavendish treated a light ray emitted from infinity, von Soldner treated a light ray emitted from the surface of the gravitating body. At the first order of approximation, they agree with each other; both are one-half the value predicted by general relativity and confirmed by experiment.

  4. Report on the geology of the Henry Mountains

    USGS Publications Warehouse

    Gilbert, G.K.

    1877-01-01

    The Henry Mountains have been visited only by the explorer. Previous to 1869 they were not placed upon any map, nor was mention made of them in any of the published accounts of exploration or survey in the Rocky Mountain region. In that year Professor Powell while descending the Colorado River in boats passed near their foot, and gave to them the name which they bear in honor of Prof. Joseph Henry, the distinguished physicist. In 1872 Prof. A. H. Thompson, engaged in the continuance of the survey of the river, led a party across the mountains by the Penellen Pass, and climbed some of the highest peaks. Frontiersmen in search of farming and grazing lands or of the precious metals have since that time paid several visits to the mountains; but no survey was made of them until the years 1875 and 1876, when Mr. Walter H. Graves and the writer visited them for that purpose. They are situated in Southern Utah, and are crossed by the meridian of 110° 45' and the thirty-eighth parallel. They stand upon the right bank of the Colorado River of the West, and between its tributaries, the Dirty Devil and the Escalante.

  5. Evaluation of confinement effects in zeolites under Henry's adsorption regime

    NASA Astrophysics Data System (ADS)

    Pera-Titus, Marc; Llorens, Joan

    2010-06-01

    This paper provides a detailed thermodynamic analysis of gas/vapour adsorption in zeolites at low pressures. At these conditions, we show first that Henry's isotherm can be conveniently rewritten using the thermodynamic isotherm model developed in a previous study [J. Llorens, M. Pera-Titus, Description of gas adsorption on microporous materials: evaluation of energy heterogeneity, J. Colloid Interface Sci. 331, 2009, 302-311], linking the integral free energy of adsorption relative to saturation, Ψ/ RT, expressed as a Kiselev integral, with the variable Z = 1/-ln( Π), being Π the relative pressure. Relevant information about sorbate confinement effects in zeolites can be inferred using strong sorbates under Henry's adsorption regime using the thermodynamic formulation provided here. The confining level of zeolites can be characterized by a parameter ( m1), whose value depends on the zeolite framework, but remains essentially unchanged with the sorbate probe molecule and temperature. We illustrate the application of these concepts using a collection of MFI and MTW-type zeolites as model systems.

  6. 1787 and 1776: Patrick Henry, James Madison, and the Revolutionary Legitimacy of the Constitution.

    ERIC Educational Resources Information Center

    Banning, Lance

    1988-01-01

    Discusses Patrick Henry's and James Madison's opinions on how the U.S. Constitution should be constructed. Describes how Henry introduced a set of substantive objections which were shared by Antifederalists throughout the country and persuaded many Revolutionaries that the Constitution was essentially at odds with the principles of 1776. (BSR)

  7. From Classrooms to Careers: The Senior Mastery Process at Henry Ford Academy.

    ERIC Educational Resources Information Center

    Parizek, Deborah; Kesavan, Sandy

    The Henry Ford Academy is the nations first charter school developed jointly by a global corporation, public education, and a non-profit cultural institution. The Senior Mastery Process at Henry Ford Academy is an innovative, challenging program of career exploration and research project for high school seniors. Beginning with initial job…

  8. 15. Historic American Buildings Survey. Plan of Fort McHenry, by ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Historic American Buildings Survey. Plan of Fort McHenry, by William Tell Poussin, 1819. National Archives, Records of the War Department, Cartographic Section, Record Group 77, drawer 51, sheet 2. - Fort McHenry National Monument & Historic Shrine, East Fort Avenue at Whetstone Point, Baltimore, Independent City, MD

  9. Into the Past through the Future: Captain Picard Meets Henry V.

    ERIC Educational Resources Information Center

    Blumrich, Ann Nord

    1994-01-01

    Describes beginning a unit on Shakespeare and his play "Henry V" by showing and discussing in class an episode from the television program "Star Trek: The Next Generation" called "The Defector," which opens with a scene from Henry V and makes allusions to the play throughout the episode. (SR)

  10. 33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section 80.515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Fifth District § 80.515 Cape Henry, VA to...

  11. 33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section 80.515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Fifth District § 80.515 Cape Henry, VA to...

  12. 33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section 80.515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Fifth District § 80.515 Cape Henry, VA to...

  13. 33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section 80.515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Fifth District § 80.515 Cape Henry, VA to...

  14. 33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section 80.515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Fifth District § 80.515 Cape Henry, VA to...

  15. 1787 and 1776: Patrick Henry, James Madison, and the Revolutionary Legitimacy of the Constitution.

    ERIC Educational Resources Information Center

    Banning, Lance

    1988-01-01

    Discusses Patrick Henry's and James Madison's opinions on how the U.S. Constitution should be constructed. Describes how Henry introduced a set of substantive objections which were shared by Antifederalists throughout the country and persuaded many Revolutionaries that the Constitution was essentially at odds with the principles of 1776. (BSR)

  16. Hubble's Law Implies Benford's Law for Distances to Galaxies

    NASA Astrophysics Data System (ADS)

    Hill, Theodore P.; Fox, Ronald F.

    2016-03-01

    A recent article by Alexopoulos and Leontsinis presented empirical evidence that the first digits of the distances from the Earth to galaxies are a reasonably good fit to the probabilities predicted by Benford's law, the well known logarithmic statistical distribution of significant digits. The purpose of the present article is to give a theoretical explanation, based on Hubble's law and mathematical properties of Benford's law, why galaxy distances might be expected to follow Benford's law. The new galaxy-distance law derived here, which is robust with respect to change of scale and base, to additive and multiplicative computational or observational errors, and to variability of the Hubble constant in both time and space, predicts that conformity to Benford's law will improve as more data on distances to galaxies becomes available. Conversely, with the logical derivation of this law presented here, the recent empirical observations may be viewed as independent evidence of the validity of Hubble's law.

  17. Nitric acid uptake by sulfuric acid solutions under stratospheric conditions - Determination of Henry's Law solubility

    NASA Technical Reports Server (NTRS)

    Reihs, Christa M.; Golden, David M.; Tolbert, Margaret A.

    1990-01-01

    The uptake of nitric acid by sulfuric acid solutions representative of stratospheric particulate at low temperatures was measured to determine the solubility of nitric acid in sulfuric acid solutions as a function of H2SO4 concentration and solution temperature. Solubilities are reported for sulfuric acid solutions ranging from 58 to 87 wt pct H2SO4 over a temperature range from 188 to 240 K, showing that, in general, the solubility of nitric acid increases with decreasing sulfuric acid concentration and with decreasing temperature. The measured solubilities indicate that nitric acid in the global stratosphere will be found predominantly in the gas phase.

  18. Demonstrating Newton's Second Law.

    ERIC Educational Resources Information Center

    Fricker, H. S.

    1994-01-01

    Describes an apparatus for demonstrating the second law of motion. Provides sample data and discusses the merits of this method over traditional methods of supplying a constant force. The method produces empirical best-fit lines which convincingly demonstrate that for a fixed mass, acceleration is proportional to force. (DDR)

  19. Demonstrating Newton's Second Law.

    ERIC Educational Resources Information Center

    Fricker, H. S.

    1994-01-01

    Describes an apparatus for demonstrating the second law of motion. Provides sample data and discusses the merits of this method over traditional methods of supplying a constant force. The method produces empirical best-fit lines which convincingly demonstrate that for a fixed mass, acceleration is proportional to force. (DDR)

  20. Proceedings of the 1990 Annual Meeting of the Association for Education in Journalism and Mass Communication (73rd, Minneapolis, Minnesota, August 1-4, 1990). Part I: Media and Law.

    ERIC Educational Resources Information Center

    Association for Education in Journalism and Mass Communication.

    This section of the proceedings is comprised of 11 papers dealing with the relationship between media and the law. Papers include: "Equal before the Law: Three Media Myths of the American Legal System" (Henry Itkin); "The Role of Senator Albert Gore, Jr. in Satellite/Cable Legislation" (Michael B. Doyle); "The Law of…

  1. Cosmological constant, fine structure constant and beyond

    NASA Astrophysics Data System (ADS)

    Wei, Hao; Zou, Xiao-Bo; Li, Hong-Yu; Xue, Dong-Ze

    2017-01-01

    In the present work, we consider the cosmological constant model Λ ∝ α ^{-6}, which is well motivated from three independent approaches. As is well known, the hint of varying fine structure constant α was found in 1998. If Λ ∝ α ^{-6} is right, it means that the cosmological constant Λ should also be varying. Here, we try to develop a suitable framework to model this varying cosmological constant Λ ∝ α ^{-6}, in which we view it from an interacting vacuum energy perspective. Then we consider the observational constraints on these models by using the 293 Δ α /α data from the absorption systems in the spectra of distant quasars. We find that the model parameters can be tightly constrained to the very narrow ranges of O(10^{-5}) typically. On the other hand, we can also view the varying cosmological constant model Λ ∝ α ^{-6} from another perspective, namely it can be equivalent to a model containing "dark energy" and "warm dark matter", but there is no interaction between them. We find that this is also fully consistent with the observational constraints on warm dark matter.

  2. Transcriptomic Response to Nitric Oxide Treatment in Larix olgensis Henry

    PubMed Central

    Hu, Xiaoqing; Yang, Jingli; Li, Chenghao

    2015-01-01

    Larix olgensis Henry is an important coniferous species found in plantation forests in northeastern China, but it is vulnerable to pathogens. Nitric oxide (NO) is an important molecule involved in plant resistance to pathogens. To study the regulatory role of NO at the transcriptional level, we characterized the transcriptomic response of L. olgensis seedlings to sodium nitroprusside (SNP, NO donor) using Illumina sequencing and de novo transcriptome assembly. A significant number of putative metabolic pathways and functions associated with the unique sequences were identified. Genes related to plant pathogen infection (FLS2, WRKY33, MAPKKK, and PR1) were upregulated with SNP treatment. This report describes the potential contribution of NO to disease resistance in L. olgensis as induced by biotic stress. Our results provide a substantial contribution to the genomic and transcriptomic resources for L. olgensis, as well as expanding our understanding of the involvement of NO in defense responses at the transcriptional level. PMID:26633380

  3. Emily Dickinson's ophthalmic consultation with Henry Willard Williams, MD.

    PubMed

    Blanchard, Donald L

    2012-12-01

    Emily Dickinson is one of America's premier poets of the 19th century. Henry Willard Williams, MD, was one of the very first physicians to limit his practice to ophthalmology and was the established leader in his field in Boston, Massachusetts. They met during the time of the Civil War, when Emily consulted him about her ophthalmic disorder. No records of the diagnosis survive. Photophobia, aching eyes, and a restriction in her ability to work up close were her main symptoms. Iritis, exotropia, or psychiatric problems are the most frequent diagnoses offered to explain her difficulties. Rather than attempt a definitive conclusion, this article will offer an additional possibility that Dr Williams likely considered (ie, hysterical hyperaesthesia of the retina). This was a common diagnosis at that time, although it has currently faded from use.

  4. W.E. Henry Symposium compendium: The importance of magnetism in physics and material science

    SciTech Connect

    Carwell, H.

    1997-09-19

    This compendium contains papers presented at the W. E. Henry Symposium, The Importance of Magnetism in Physics and Material Science. The one-day symposium was conducted to recognize the achievements of Dr. Warren Elliot Henry as educator, scientist, and inventor in a career spanning almost 70 years. Dr. Henry, who is 88 years old, attended the symposium. Nobel Laureate, Dr. Glenn Seaborg, a friend and colleague for over 40 years, attended the event and shared his personal reminiscences. Dr. Seaborg is Associate Director-At-Large at the Lawrence Berkeley National Laboratory. The Compendium begins with three papers which demonstrate the ongoing importance of magnetism in physics and material science. Other contributions cover the highlights of Dr. Henry`s career as a researcher, educator, and inventor. Colleagues and former students share insights on the impact of Dr. Henry`s research in the field of magnetism, low temperature physics, and solid state physics; his influence on students as an educator; and his character, intellect and ingenuity, and passion for learning and teaching. They share a glimpse of the environment and times that molded him as a man, and the circumstances under which he made his great achievements despite the many challenges he faced.

  5. Laser Propulsion and the Constant Momentum Mission

    SciTech Connect

    Larson, C. William; Mead, Franklin B. Jr.; Knecht, Sean D.

    2004-03-30

    We show that perfect propulsion requires a constant momentum mission, as a consequence of Newton's second law. Perfect propulsion occurs when the velocity of the propelled mass in the inertial frame of reference matches the velocity of the propellant jet in the rocket frame of reference. We compare constant momentum to constant specific impulse propulsion, which, for a given specification of the mission delta V, has an optimum specific impulse that maximizes the propelled mass per unit jet kinetic energy investment. We also describe findings of more than 50 % efficiency for conversion of laser energy into jet kinetic energy by ablation of solids.

  6. The "Global" Formulation of Thermodynamics and the First Law: 50 Years On

    ERIC Educational Resources Information Center

    Gislason, Eric A.; Craig, Norman C.

    2011-01-01

    Nearly 50 years ago, Henry Bent published his groundbreaking article in this "Journal" introducing the "global" formulation of thermodynamics. In the following years, the global formulation was elaborated by Bent and by one of the present authors. The global formulation of the first law focuses on conservation of energy and the recognition that…

  7. The "Global" Formulation of Thermodynamics and the First Law: 50 Years On

    ERIC Educational Resources Information Center

    Gislason, Eric A.; Craig, Norman C.

    2011-01-01

    Nearly 50 years ago, Henry Bent published his groundbreaking article in this "Journal" introducing the "global" formulation of thermodynamics. In the following years, the global formulation was elaborated by Bent and by one of the present authors. The global formulation of the first law focuses on conservation of energy and the recognition that…

  8. Limit laws for Zipf's law

    NASA Astrophysics Data System (ADS)

    Eliazar, Iddo

    2011-01-01

    In this communication we establish stochastic limit laws leading from Zipf's law to Pareto's and Heaps' laws. We consider finite ensembles governed by Zipf's law and study their asymptotic statistics as the ensemble size tends to infinity. A Lorenz-curve analysis establishes three types of limit laws for the ensembles' statistical structure: 'communist', 'monarchic', and Paretian. Further considering a dynamic setting in which the ensembles grow stochastically in time, a functional central limit theorem analysis establishes a Gaussian approximation for the ensembles' stochastic growth. The Gaussian approximation provides a generalized and corrected formulation of Heaps' law.

  9. Planck's Energy Constant

    NASA Astrophysics Data System (ADS)

    Brooks, Juliana

    2010-02-01

    Planck's proportionality constant ``h'' is not an action constant. Re-examination of Planck's work has revealed the numerical value for his famous constant ``h'' is actually an energy constant.* Planck's energy constant is the mean energy of a single oscillation of electromagnetic energy, namely 6.626 X 10-34 J/osc. The misinterpretation of Planck's constant resulted from an inadvertent mathematical procedure in his 1901 black-body derivation. Planck's energy constant is found in his original (1897) quantum relationship: E a ν tm where energy (``E'') is proportional to the product of a constant (``a'', energy per oscillation), the frequency (``ν''), and the measurement time (``tm''). Planck's inadvertence fixed the measurement time variable ``tm'' at a value of one second, and multiplied it by his constant ``a'', resulting in the product ``h'' which Planck proposed as the ``quantum of action''. Planck's black-body derivation and condensed quantum formula E = hν were never knowingly premised on one second time intervals, however. Subsequent development of quantum mechanics thus took place against the back drop of a hidden assumption. Numerous paradoxes, problems and a lack of reality resulted. Recognition of Planck's energy constant provides a richer and more realistic interpretation of quantum mechanics. *Brooks, JHJ, ``Hidden Variables: The Elementary Quantum of Light'', The Nature of Light: What are Photons? III, Proc. of SPIE Vol. 7421, 74210T-3, 2009. )

  10. An Empirical Examination of Lotka's Law.

    ERIC Educational Resources Information Center

    Pao, Miranda Lee

    1986-01-01

    Findings of empirical examination of author productivity data to determine conformity to Lotka's law indicate that: most data didn't fit inverse square function; two constants in Lotka's formulation (slope n, constant c) must be derived from observed distribution; inverse square law was special case of inverse exponential relationship. (37…

  11. On the Khinchin Constant

    NASA Technical Reports Server (NTRS)

    Bailey, David H.; Borwein, Jonathan M.; Crandall, Richard E.; Craw, James M. (Technical Monitor)

    1995-01-01

    We prove known identities for the Khinchin constant and develop new identities for the more general Hoelder mean limits of continued fractions. Any of these constants can be developed as a rapidly converging series involving values of the Riemann zeta function and rational coefficients. Such identities allow for efficient numerical evaluation of the relevant constants. We present free-parameter, optimizable versions of the identities, and report numerical results.

  12. Darwin's laws.

    PubMed

    Haufe, Chris

    2012-03-01

    There is widespread agreement among contemporary philosophers of biology and philosophically-minded biologists that Darwin's insights about the intrusion of chance processes into biological regularities undermines the possibility of there being biological laws. Darwin made references to "designed laws." He also freely described some laws as having exceptions. This paper provides a philosophical analysis of the notion of scientific laws that was dominant in Darwin's time, and in all probability the one which he inherited. The analysis of laws is then used to show how it could have been natural for Darwin to believe in designed laws that had exceptions, and to highlight the continuity between the metaphysics of pre-Darwinian, Darwinian, and contemporary biological science. One important result is the removal of one motivation for the anti-laws sentiment in philosophy and biology. Copyright © 2011 Elsevier Ltd. All rights reserved.

  13. On Reading, Writing, and Computers: A Conversation with John Martin Henry.

    ERIC Educational Resources Information Center

    Brandt, Ron, Ed.

    1981-01-01

    With a simplified alphabet and interactive computer programing, John Henry Martin has developed a system by which children can learn to read and write far better than usual. In this interview, he explains his approach. (Author/MLF)

  14. 78 FR 8682 - Culturally Significant Objects Imported for Exhibition Determinations: “Henri Labrouste...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-06

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF STATE Culturally Significant Objects Imported for Exhibition Determinations: ``Henri Labrouste: Structure Brought to Light'' SUMMARY: Notice is hereby given of the following determinations: Pursuant to the...

  15. HABS DC,WASH,515A (sheet 4 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 4 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  16. HABS DC,WASH,515A (sheet 2 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 2 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  17. HABS DC,WASH,515A (sheet 1 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 1 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  18. HABS DC,WASH,515A (sheet 3 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 3 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  19. 30. Interior view of mechanical room; showing MacHenry; west end ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. Interior view of mechanical room; showing MacHenry; west end of lower floor; view to southwest. - Ellsworth Air Force Base, Group Administration & Secure Storage Building, 2372 Westover Avenue, Blackhawk, Meade County, SD

  20. Enantioselective synthesis of SSR 241586 by using an organo-catalyzed Henry reaction.

    PubMed

    Cochi, Anne; Métro, Thomas-Xavier; Pardo, Domingo Gomez; Cossy, Janine

    2010-08-20

    An organo-catalyzed Henry reaction, applied to an alpha-keto ester, has allowed the enantioselective synthesis of SSR 241586, a 2,2-disubstituted morpholine active in the treatment of schizophrenia and irritable bowel syndrome (IBS).

  1. 46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Atlantic Coast § 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light “2”...

  2. 46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Atlantic Coast § 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light “2”...

  3. 46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Atlantic Coast § 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light “2”...

  4. 46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Atlantic Coast § 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light “2”...

  5. 46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Atlantic Coast § 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light “2”...

  6. American Chemical Society division of fuel chemistry Henry H. Storch award.

    SciTech Connect

    Chemistry

    1998-05-01

    American Chemical Society Division of Fuel Chemistry Henry H. Storch Award ... The purpose of the Henry H. Storch Award is to recognize distinguished contributions worldwide to fundamental or engineering research on the chemistry and utilization of all hydrocarbon fuels, with the exception of petroleum. ... The award was established in 1964 by the American Chemical Society Division of Fuel Chemistry and administered by the Division until 1985.

  7. Fundamental Physical Constants

    National Institute of Standards and Technology Data Gateway

    SRD 121 CODATA Fundamental Physical Constants (Web, free access)   This site, developed in the Physics Laboratory at NIST, addresses three topics: fundamental physical constants, the International System of Units (SI), which is the modern metric system, and expressing the uncertainty of measurement results.

  8. A New Physical Constant And Its Importance To Energy Production

    NASA Astrophysics Data System (ADS)

    Angus, Andrew

    2003-03-01

    The purpose of this paper is to introduce a new physical constant symbolized by the Greek letter lambda. This paper explains how the new physical constant was derived. This paper also explains the significance of the new physical constant as an alternative explanation to Einstein's Law of Photoelectric Effect. The new physical constant leads to a deeper understanding of the nature of the photon. Furthermore, this new physical constant leads us to the existence of two types of photon, the Planck photon and the Angus photon. Finally, the author also explains the importance of this new physical constant in energy production.

  9. Enzyme-Catalyzed Henry Reaction in Choline Chloride-Based Deep Eutectic Solvents.

    PubMed

    Tian, Xuemei; Zhang, Suoqin; Zheng, Liangyu

    2016-01-01

    The enzyme-catalyzed Henry reaction was realized using deep eutectic solvents (DESs) as a reaction medium. The lipase from Aspergillus niger (lipase AS) showed excellent catalytic activity toward the substrates aromatic aldehydes and nitromethane in choline chloride:glycerol at a molar ratio of 1:2. Addition of 30 vol% water to DES further improved the lipase activity and inhibited DES-catalyzed transformation. A final yield of 92.2% for the lipase AS-catalyzed Henry reaction was achieved under optimized reaction conditions in only 4 h. In addition, the lipase AS activity was improved by approximately 3-fold in a DES-water mixture compared with that in pure water, which produced a final yield of only 33.4%. Structural studies with fluorescence spectroscopy showed that the established strong hydrogen bonds between DES and water may be the main driving force that affects the spatial conformation of the enzyme, leading to a change in lipase activity. The methodology was also extended to the aza-Henry reaction, which easily occurred in contrast to that in pure water. The enantioselectivity of both Henry and aza-Henry reactions was not found. However, the results are still remarkable, as we report the first use of DES as a reaction medium in a lipase-catalyzed Henry reaction.

  10. The head that wears the crown: Henry VIII and traumatic brain injury.

    PubMed

    Ikram, Muhammad Qaiser; Sajjad, Fazle Hakim; Salardini, Arash

    2016-06-01

    Henry VIII of England is one of the most controversial figures in European history. He was born on 28 June 1491 as the second son of Henry VII and Elizabeth of York and became the heir to the English throne after his elder brother died prematurely. A contradictory picture of Henry's character emerges from history: the young Henry was a vigorous, generous and intelligent king who saw early military and naval successes. In contrast, in his later years he became cruel, petty and tyrannical. His political paranoia and military misjudgements are in direct contrast to his earlier successes and promise. Several hypotheses have been put forward regarding his transformation from a renaissance king to a later medieval tyrant, including endocrinopathies, psychiatric illnesses and traumatic brain injury. In this paper we examine the historical evidence linking the change in Henry's personality and health problems to traumatic brain injury. To our knowledge this is the first systematic neurological study of traumatic brain injury in Henry VIII. Copyright © 2015 Elsevier Ltd. All rights reserved.

  11. Henry's voices: the representation of auditory verbal hallucinations in an autobiographical narrative.

    PubMed

    Demjén, Zsófia; Semino, Elena

    2015-06-01

    The book Henry's Demons (2011) recounts the events surrounding Henry Cockburn's diagnosis of schizophrenia from the alternating perspectives of Henry himself and his father Patrick. In this paper, we present a detailed linguistic analysis of Henry's first-person accounts of experiences that could be described as auditory verbal hallucinations. We first provide a typology of Henry's voices, taking into account who or what is presented as speaking, what kinds of utterances they produce and any salient stylistic features of these utterances. We then discuss the linguistically distinctive ways in which Henry represents these voices in his narrative. We focus on the use of Direct Speech as opposed to other forms of speech presentation, the use of the sensory verbs hear and feel and the use of 'non-factive' expressions such as I thought and as if. We show how different linguistic representations may suggest phenomenological differences between the experience of hallucinatory voices and the perception of voices that other people can also hear. We, therefore, propose that linguistic analysis is ideally placed to provide in-depth accounts of the phenomenology of voice hearing and point out the implications of this approach for clinical practice and mental healthcare.

  12. Mass Transfer Coefficients and Henry’s Constants for Packed-Tower Air Stripping of Volatile Organics: Measurements and Correlation.

    DTIC Science & Technology

    1985-06-01

    Himmelblau , 1970; Onda et al., 1968; Liss and Martinelli, 1978; Smith et al., 1980). A surface-active substance (surfactant) can alter the rate of mass...i.1--,’ -:-- L’ Using a nonexperimental approach, Ferrell and Himmelblau (1967) noted another restriction in the...and Himmelblau (1964) cite the use of estimated molar volumes as one reason fo,- the deviation between experimental and calculated diffusi- vities

  13. The enigmatic figure of Dr Henry Maudsley (1835-1918).

    PubMed

    Pantelidou, Maria; Demetriades, Andreas K

    2014-08-01

    In spite of his contribution to psychiatry in 19th century Britain, Henry Maudsley remains a mysterious figure, a man mostly known for his donation to the London County Council for the building of the Maudsley Hospital and for The Maudsley Annual Lecture created in honour of his benevolence. Besides Sir Aubrey Lewis' article in 1951 and Michael Collie's attempt in 1988 to construct a biographical study on Maudsley, there does not seem to be any current endeavour to tell the story of his life, whereas Trevor Turner's contribution to the 2004 Oxford Dictionary of National Biography gives a somewhat scathing but unattributed account of Maudsley's personality. This essay attempts to explore his contributions to the Medico-Psychological Association (MPA), the current Royal College of Psychiatrists, his editorship of the Journal of Mental Health (currently named the British Journal of Psychiatry), his literary contributions and his vision for a psychiatric hospital. This essay is an attempt to demystify his figure and to explore some of the rumours and criticisms surrounding his name and the reasons why so little has been written about him. It is also a venture to unravel his complex personality and his intricate philosophy. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  14. Genetic Analysis of the Henry Mountains Bison Herd

    PubMed Central

    du Toit, Johan T.; Derr, James

    2015-01-01

    Wild American plains bison (Bison bison) populations virtually disappeared in the late 1800s, with some remnant animals retained in what would become Yellowstone National Park and on private ranches. Some of these private bison were intentionally crossbred with cattle for commercial purposes. This forced hybridization resulted in both mitochondrial and nuclear introgression of cattle genes into some of the extant bison genome. As the private populations grew, excess animals, along with their history of cattle genetics, provided founders for newly established public bison populations. Of the US public bison herds, only those in Yellowstone and Wind Cave National Parks (YNP and WCNP) appear to be free of detectable levels of cattle introgression. However, a small free-ranging population (~350 animals) exists on public land, along with domestic cattle, in the Henry Mountains (HM) of southern Utah. This isolated bison herd originated from a founder group translocated from YNP in the 1940s. Using genetic samples from 129 individuals, we examined the genetic status of the HM population and found no evidence of mitochondrial or nuclear introgression of cattle genes. This new information confirms it is highly unlikely for free-living bison to crossbreed with cattle, and this disease-free HM bison herd is valuable for the long-term conservation of the species. This bison herd is a subpopulation of the YNP/WCNP/HM metapopulation, within which it can contribute significantly to national efforts to restore the American plains bison to more of its native range. PMID:26673758

  15. A citation analysis of Henri Tajfel's work on intergroup relations.

    PubMed

    Dumont, Kitty; Louw, Johann

    2009-02-01

    The late Henri Tajfel (1919-1982) is one of the central figures who shaped the development of post-war European social psychology. His contributions range from the establishment of an infrastructure for a European social psychology, and the start of a new intellectual movement within social psychology, to the formulation of a set of concepts addressing intergroup relations that were finally integrated into Social Identity Theory. The present study provides an empirical examination of Tajfel's contribution to intergroup research over the last 30 years via a citation analysis of five journals: the Journal of Personality and Social Psychology, the British Journal of Social Psychology, the European Journal of Social Psychology, the South African Journal of Psychology, and the German Journal of Social Psychology (Zeitschrift für Sozialpsychologie). The results indicate that Tajfel's work on intergroup relations is increasingly cited, especially since the 1990s, and the international recognition of his work is substantial. Three possible reasons for the recognition his work still enjoys are proposed: its potential to generate theoretical and empirical controversies; its explanatory power; and the extent to which his work is used as a referential framework.

  16. James Henry Marriott: New Zealand's first professional telescope-maker

    NASA Astrophysics Data System (ADS)

    Orchiston, Wayne; Romick, Carl; Brown, Pendreigh.

    2015-11-01

    James Henry Marriott was born in London in 1799 and trained as an optician and scientific instrument- maker. In 1842 he emigrated to New Zealand and in January 1843 settled in the newly-established town of Wellington. He was New Zealand's first professional telescope-maker, but we have only been able to locate one telescope made by him while in New Zealand, a brass 1-draw marine telescope with a 44-mm objective, which was manufactured in 1844. In 2004 this marine telescope was purchased in Hawaii by the second author of this paper. In this paper we provide biographical information about Marriott, describe his 1844 marine telescope and speculate on its provenance. We conclude that although he may have been New Zealand's first professional telescope-maker Marriot actually made very few telescopes or other scientific instruments. As such, rather than being recognised as a pioneer of telescope-making in New Zealand he should be remembered as the founder of New Zealand theatre.

  17. Genetic Analysis of the Henry Mountains Bison Herd.

    PubMed

    Ranglack, Dustin H; Dobson, Lauren K; du Toit, Johan T; Derr, James

    2015-01-01

    Wild American plains bison (Bison bison) populations virtually disappeared in the late 1800s, with some remnant animals retained in what would become Yellowstone National Park and on private ranches. Some of these private bison were intentionally crossbred with cattle for commercial purposes. This forced hybridization resulted in both mitochondrial and nuclear introgression of cattle genes into some of the extant bison genome. As the private populations grew, excess animals, along with their history of cattle genetics, provided founders for newly established public bison populations. Of the US public bison herds, only those in Yellowstone and Wind Cave National Parks (YNP and WCNP) appear to be free of detectable levels of cattle introgression. However, a small free-ranging population (~350 animals) exists on public land, along with domestic cattle, in the Henry Mountains (HM) of southern Utah. This isolated bison herd originated from a founder group translocated from YNP in the 1940s. Using genetic samples from 129 individuals, we examined the genetic status of the HM population and found no evidence of mitochondrial or nuclear introgression of cattle genes. This new information confirms it is highly unlikely for free-living bison to crossbreed with cattle, and this disease-free HM bison herd is valuable for the long-term conservation of the species. This bison herd is a subpopulation of the YNP/WCNP/HM metapopulation, within which it can contribute significantly to national efforts to restore the American plains bison to more of its native range.

  18. Glyoxal and Methylglyoxal Setschenow Salting Constants in Sulfate, Nitrate, and Chloride Solutions: Measurements and Gibbs Energies.

    PubMed

    Waxman, Eleanor M; Elm, Jonas; Kurtén, Theo; Mikkelsen, Kurt V; Ziemann, Paul J; Volkamer, Rainer

    2015-10-06

    Knowledge about Setschenow salting constants, KS, the exponential dependence of Henry's Law coefficients on salt concentration, is of particular importance to predict secondary organic aerosol (SOA) formation from soluble species in atmospheric waters with high salt concentrations, such as aerosols. We have measured KS of glyoxal and methylglyoxal for the atmospherically relevant salts (NH4)2SO4, NH4NO3, NaNO3, and NaCl and find that glyoxal consistently "salts-in" (KS of -0.16, -0.06, -0.065, -0.1 molality(-1), respectively) while methylglyoxal "salts-out" (KS of +0.16, +0.075, +0.02, +0.06 molality(-1)). We show that KS values for different salts are additive and present an equation for use in atmospheric models. Additionally, we have performed a series of quantum chemical calculations to determine the interactions between glyoxal/methylglyoxal monohydrate with Cl(-), NO3(-), SO4(2-), Na(+), and NH4(+) and find Gibbs free energies of water displacement of -10.9, -22.0, -22.9, 2.09, and 1.2 kJ/mol for glyoxal monohydrate and -3.1, -10.3, -7.91, 6.11, and 1.6 kJ/mol for methylglyoxal monohydrate with uncertainties of 8 kJ/mol. The quantum chemical calculations support that SO4(2-), NO3(-), and Cl(-) modify partitioning, while cations do not. Other factors such as ion charge or partitioning volume effects likely need to be considered to fully explain salting effects.

  19. Kepler's Laws

    NASA Astrophysics Data System (ADS)

    Mosser, B.; Murdin, P.

    2001-10-01

    Johannes KEPLER published his three laws in 1609 and 1618 (table 1). Based on the very precise observations of Mars' orbit made by Tycho Brahe, and developed in the Copernican system, they describe the shape of the orbit of the planets around the Sun as an ellipse (first law), explain how the planets move around the Sun (second law) and give a relationship between the extent of the orbit and its ...

  20. "Recognizing Numerical Constants"

    NASA Technical Reports Server (NTRS)

    Bailey, David H.; Craw, James M. (Technical Monitor)

    1995-01-01

    The advent of inexpensive, high performance computer and new efficient algorithms have made possible the automatic recognition of numerically computed constants. In other words, techniques now exist for determining, within certain limits, whether a computed real or complex number can be written as a simple expression involving the classical constants of mathematics. In this presentation, some of the recently discovered techniques for constant recognition, notably integer relation detection algorithms, will be presented. As an application of these methods, the author's recent work in recognizing "Euler sums" will be described in some detail.

  1. The cosmological constant problem

    SciTech Connect

    Dolgov, A.D.

    1989-05-01

    A review of the cosmological term problem is presented. Baby universe model and the compensating field model are discussed. The importance of more accurate data on the Hubble constant and the Universe age is stressed. 18 refs.

  2. Science Is Constantly Cool.

    ERIC Educational Resources Information Center

    Eichinger, John

    1996-01-01

    Presents an activity in which students attempt to keep water at a constant temperature. Helps students in grades three to six hone their skills in prediction, observation, measurement, data collection, graphing, data analysis, and communication. (JRH)

  3. Law 302.

    ERIC Educational Resources Information Center

    Manitoba Dept. of Education, Winnipeg.

    This publication outlines a law course intended as part of a business education program in the secondary schools of Manitoba, Canada. The one credit course of study should be taught over a period of 110-120 hours of instruction. It provides students with an introduction to the principles, practices, and consequences of law with regard to torts,…

  4. Space Law

    NASA Astrophysics Data System (ADS)

    Hermida, Julian

    2006-01-01

    This chapter examines the salient characteristics of Space Law. It analyzes the origins and evolution of Space Law, its main international principles, and some current topics of interest to the scientific community: the delimitation of airspace and outer space, intellectual property, and criminal responsibility.

  5. [Hypospadia and infertility of Henry II of France (1519-1559)].

    PubMed

    Hatzinger, M; Al-Shajlawi, S; Sohn, M

    2014-03-01

    Henry II (1519-1559) of France was the second son of Francis I (1494-1547) and Claude de France (1498-1524) born in 1519 in St. Germain-en-Laye. After his older brother's and his father's death in 1547, he was anointed the French king in Reims. In 1533 already, as a 14-year-old boy, for reasons of state, he was married to the same aged Catherine de Medici (1519-1589), as her uncle was Pope Clement VII (1478-1534). The marriage remained childless for 11 years since Henry, due to a distinct hypospadia and a completely sexually inexperienced wife was unable to conceive children with her. His existing liaison to Diane de Poitiers (1499-1566) - a 19-year-older maid of honor of his father Francis I from 1537 until his death - influenced his sexual life immensely.The blame for the childless marriage was placed primarily on his wife, as Henry had become father of an illegitimate daughter with a mistress. Catherine then underwent all possible medical and alchemical procedures to finally give birth to the hoped Dauphin. Ironically, her rival for the favor of her husband, Diane de Poitiers was one of her greatest allies. She made clear that the cause lay with Henry and not with his wife. This was confirmed by the added solid physician Jean Fernel (1497-1558). His treatment of Henry and the simultaneous training of the unexperienced Catherine by Diane de Poitiers led to success.The result was the birth of Francis II (1544-1560) in 1544, the first of 10 children in 12 years. Thus, the dynasty was saved. After the death of Henry in a tragic tournament accident in 1559, three of his sons became kings of France. But the line of Valois remained without further descendants and was continued by Henry IV, the first Bourbon king in 1589.

  6. General Henry Arnold Visits the Aircraft Engine Research Laboratory

    NASA Image and Video Library

    1944-11-21

    General Henry “Hap” Arnold, Commander of the US Army Air Forces during World War II, addresses the staff at the National Advisory Committee for Aeronautics (NACA) Aircraft Engine Research Laboratory on November 9, 1944. Arnold told the employees assembled in the hangar, “You’ve got a dual task. You’ve got a job ahead of you to keep the army and the navy air forces equipped with the finest equipment that you can for this war. You also have the job of looking forward into the future and starting now those developments, those experiments, that are going to keep us in our present situation—ahead of the world in the air. And that is quite a large order, and I leave it right in your laps.” Arnold served on the NACA’s Executive Committee in Washington from 1938 to 1944 and had been a strong advocate for the creation of the new engine research facility in Cleveland. Arnold believed in continual research and development. He pressed the nation’s aviation leaders to pursue the new jet engine technology, while simultaneously pushing to increase the performance of the nation’s largest piston engine for the B–29 Superfortress program. The general’s hectic wartime agenda limited his visit to the Cleveland laboratory to just a few hours, but he toured several of the NACA’s new test facilities including the Static Jet Propulsion Laboratory, the Icing Research Tunnel, and a B–24 Liberator in the hangar.

  7. The Works of Henry Moseley, 1887-1915

    NASA Astrophysics Data System (ADS)

    Scerri, Eric

    2013-04-01

    In 1913 Henry Moseley, an unknown young English physicist published an article in the Philosophical Magazine under the title of ``The High Frequency Spectra of the Elements.'' The 10-page article was to have far reaching implications in both chemistry and physics and helped to resolve a major conundrum in the periodic table of the elements. The talk will briefly examine the life and work of Moseley who died tragically while fighting in the trenches of World War I in 1915. The build-up to the discovery of atomic number took several different avenues including contributions from Rutherford and Barkla. However the more direct motivation for Moseley's work, as he readily acknowledged, were the articles of an unknown Dutch econometrician Anton Van den Broek who attempted to improve on Mendeleev's periodic table. Moseley began as a student of Rutherford at Manchester and took a keen interest in the development of research using X-rays following the work of Roentgen, von Laue and Bragg. Although Rutherford was at first reluctant to enter this new field he soon yielded to young Moseley's request and sent him to Leeds for brief training with Bragg. On returning to Manchester, Moseley devised an ingenious apparatus in which a set of metal samples could be rotated so as to become the target for a beam of electrons in order to measure the frequencies of the emitted K X-rays. The first set of such experiments used nine successive elements in the periodic table, from titanium to zinc. Moseley's now immense fame rests with the results of this study as well as a subsequent one which extended the study into a further 30 elements, in addition to the use that his method was put to by himself as well as subsequent chemists and physicists.

  8. Henry Daniel Cogswell, DDS (1819-1900): a temperance advocate, philanthropist and builder of ice-water fountains.

    PubMed

    Christen, A G; Theobald, M S; Christen, J A

    1999-07-01

    Henry Daniel Cogswell (Fig. 1), the second of five children, was born in Tolland, Connecticut on March 3, 1819. His father, George Washington Cogswell, was a general carpenter, architect and builder of moderate circumstances. In 1827, when Henry was eight, his mother died. The following year, Henry's father moved to Orwell, (Oswego County) New York, in hopes of improving his financial condition. Henry was left behind in the care of his paternal grandfather, who died several months later, leaving the 10-year old boy, stranded and forced to rely upon his own resources. (In those times, when families were separated, individual members had limited means of locating one another.)

  9. The law of constant rejection. [chemical bonding in crystals

    NASA Technical Reports Server (NTRS)

    Philpotts, J. A.

    1978-01-01

    Improvements in analytical technique, study of multielement partitioning in natural systems, and improvements in ionic radius values have permitted construction of Onuma diagrams, in which the logarithm of partition coefficient is plotted versus ionic radius. The optimum radii, corresponding to crystallographic sites, do change in response to changes in major element composition for any particular mineral-type. In natural systems elements compete for sites rather than substituting for another element. It is proposed on empirical grounds, for equilibrium ionic bonding, that Onuma diagram curves for a particular lattice site are parabolic near optimum radius, linear elsewhere, parallel for different valences, and mirror images on opposite sides of optimum. Deviations may be due to overlapping peaks, liquid structure, polyvalence, bonding differences, contamination, kinetics, alteration, etc. However, dominant crystal-chemical control is indicated.

  10. The law of constant rejection. [chemical bonding in crystals

    NASA Technical Reports Server (NTRS)

    Philpotts, J. A.

    1978-01-01

    Improvements in analytical technique, study of multielement partitioning in natural systems, and improvements in ionic radius values have permitted construction of Onuma diagrams, in which the logarithm of partition coefficient is plotted versus ionic radius. The optimum radii, corresponding to crystallographic sites, do change in response to changes in major element composition for any particular mineral-type. In natural systems elements compete for sites rather than substituting for another element. It is proposed on empirical grounds, for equilibrium ionic bonding, that Onuma diagram curves for a particular lattice site are parabolic near optimum radius, linear elsewhere, parallel for different valences, and mirror images on opposite sides of optimum. Deviations may be due to overlapping peaks, liquid structure, polyvalence, bonding differences, contamination, kinetics, alteration, etc. However, dominant crystal-chemical control is indicated.

  11. Dielectric Constant of Suspensions

    NASA Astrophysics Data System (ADS)

    Mendelson, Kenneth S.; Ackmann, James J.

    1997-03-01

    We have used a finite element method to calculate the dielectric constant of a cubic array of spheres. Extensive calculations support preliminary conclusions reported previously (K. Mendelson and J. Ackmann, Bull. Am. Phys. Soc. 41), 657 (1996).. At frequencies below 100 kHz the real part of the dielectric constant (ɛ') shows oscillations as a function of the volume fraction of suspension. These oscillations disappear at low conductivities of the suspending fluid. Measurements of the dielectric constant (J. Ackmann, et al., Ann. Biomed. Eng. 24), 58 (1996). (H. Fricke and H. Curtis, J. Phys. Chem. 41), 729 (1937). are not sufficiently sensitive to show oscillations but appear to be consistent with the theoretical results.

  12. Elastic constants of calcite

    USGS Publications Warehouse

    Peselnick, L.; Robie, R.A.

    1962-01-01

    The recent measurements of the elastic constants of calcite by Reddy and Subrahmanyam (1960) disagree with the values obtained independently by Voigt (1910) and Bhimasenachar (1945). The present authors, using an ultrasonic pulse technique at 3 Mc and 25??C, determined the elastic constants of calcite using the exact equations governing the wave velocities in the single crystal. The results are C11=13.7, C33=8.11, C44=3.50, C12=4.82, C13=5.68, and C14=-2.00, in units of 1011 dyncm2. Independent checks of several of the elastic constants were made employing other directions and polarizations of the wave velocities. With the exception of C13, these values substantially agree with the data of Voigt and Bhimasenachar. ?? 1962 The American Institute of Physics.

  13. Solute and heat transport model of the Henry and hilleke laboratory experiment.

    PubMed

    Langevin, Christian D; Dausman, Alyssa M; Sukop, Michael C

    2010-01-01

    SEAWAT is a coupled version of MODFLOW and MT3DMS designed to simulate variable-density ground water flow and solute transport. The most recent version of SEAWAT, called SEAWAT Version 4, includes new capabilities to represent simultaneous multispecies solute and heat transport. To test the new features in SEAWAT, the laboratory experiment of Henry and Hilleke (1972) was simulated. Henry and Hilleke used warm fresh water to recharge a large sand-filled glass tank. A cold salt water boundary was represented on one side. Adjustable heating pads were used to heat the bottom and left sides of the tank. In the laboratory experiment, Henry and Hilleke observed both salt water and fresh water flow systems separated by a narrow transition zone. After minor tuning of several input parameters with a parameter estimation program, results from the SEAWAT simulation show good agreement with the experiment. SEAWAT results suggest that heat loss to the room was more than expected by Henry and Hilleke, and that multiple thermal convection cells are the likely cause of the widened transition zone near the hot end of the tank. Other computer programs with similar capabilities may benefit from benchmark testing with the Henry and Hilleke laboratory experiment.

  14. Solute and heat transport model of the Henry and Hilleke laboratory experiment

    USGS Publications Warehouse

    Langevin, C.D.; Dausman, A.M.; Sukop, M.C.

    2010-01-01

    SEAWAT is a coupled version of MODFLOW and MT3DMS designed to simulate variable-density ground water flow and solute transport. The most recent version of SEAWAT, called SEAWAT Version 4, includes new capabilities to represent simultaneous multispecies solute and heat transport. To test the new features in SEAWAT, the laboratory experiment of Henry and Hilleke (1972) was simulated. Henry and Hilleke used warm fresh water to recharge a large sand-filled glass tank. A cold salt water boundary was represented on one side. Adjustable heating pads were used to heat the bottom and left sides of the tank. In the laboratory experiment, Henry and Hilleke observed both salt water and fresh water flow systems separated by a narrow transition zone. After minor tuning of several input parameters with a parameter estimation program, results from the SEAWAT simulation show good agreement with the experiment. SEAWAT results suggest that heat loss to the room was more than expected by Henry and Hilleke, and that multiple thermal convection cells are the likely cause of the widened transition zone near the hot end of the tank. Other computer programs with similar capabilities may benefit from benchmark testing with the Henry and Hilleke laboratory experiment. Journal Compilation ?? 2009 National Ground Water Association.

  15. [Henry Toussaint and Louis Pasteur. Rivalry over a vaccine].

    PubMed

    Chevallier-Jussiau, Nadine

    2010-01-01

    Henry Toussaint (1847-1890) is a veterinary who studied in Veterinary School of Lyon with his great master Auguste Chauveau the famous physiologist. This place is the First School founded in Europe at the end of the XVIIIth century and has opened a way of thinking. His carrer brilliant and rich begins first in Lyon and then when he is named Professor of Anatomy and Physiology at the Veterinary School of Toulouse. Doctor of Science and Doctor of Medecine Toussaint applies "the experimental method" to his research in his laboratory and makes a lot of publications. He starts with Anatomy, then Physiology and soon he prioritizes his research to infestious diseases which cause serious damage to cattle in this time. He developes his own methods about anthrax an its "bacteridie", its nature, its way of culture and especially he studies the physiopathology of this disease. Pasteur is a renowned scientist who does study Microbiology at the same time in his laboratory in Paris, and precisely anthrax. He has explained his theories about "microbes" and has predominant advice. Toussaint admires Pasteur; in the year 1879 he finds first and isolates the microbe of "cholera des poules" (now Pasteurella) and gives Pasteur this new germ which will be used by Pasteur for his particular works about reducing of virulence by successive subcultures. In 1880 with his publishing on July 12 at the Academy of Science, Toussaint presents his successful result with an attenuated vaccine against anthrax: he has got protection against anthrax for dogs and sheep by using a vaccine which he has reduced off virulence by chemical manner. Academy congratulates him. Pasteur jealous of one's reputation contests the demonstration of Toussaint because he does not believe in the chemical method too different from his tests but will make use of this method for an experience open to the public in Pouilly-le-Fort in 1881. After this promotional event Pasteur will product and sell vaccines maked in his

  16. Annie Jump Cannon: `` Life after The Henry Draper Catalogue.''

    NASA Astrophysics Data System (ADS)

    Welther, B. L.

    1993-05-01

    Seventy-five years ago the first three volumes of The Henry Draper Catalogue were published. The pages printed in 1918 contain the spectral types, revised magnitudes, and updated positions for more than 77,000 stars. For the nine volumes of the catalogue, Cannon classified spectra for 225,300 stars; and in her lifetime, spectra for almost 400,000 stars. This work netted her half a dozen honorary degrees, the Draper Medal of the NAS, and numerous other prizes and honors. In his preface to Volume 1, Edward Pickering noted that it took two years to process the copy for the initial volumes and estimated that it would take two more years to complete the copy for the remaining volumes. But shortly after he wrote the preface for Volume 3 in December 1918, Pickering died. And it proved to take three times as long as he had predicted to complete the publication of all nine volumes of the catalogue by the spring of 1924. Although Cannon had enjoyed much more independence and status than the other women at HCO, she had looked to Pickering for guidance and financial support for her astronomical projects. Without him, she had to develop other resources and also had to represent the Harvard Classification for the first IAU meeting in Rome in 1922. Although she did not attend the meeting, she corresponded with Frederick Seares at Mount Wilson Observatory about various questions that astronomers had raised about classifying spectra. Meanwhile, in 1921 Harlow Shapley was appointed Director of HCO. He oversaw the publication of the final volumes of the HD and encouraged Cannon to extend it for stars in special regions. For the HD Extension, he hired Margaret Walton to assist Cannon. But the cost of labor to determine positions and magnitudes was prohibitive, so for many stars the HDE lists only the BD number and spectral type. Even that format proved too costly in the depression and war years. Consequently, the last volume of the HDE was published as charts after World War II.

  17. Dr. Henry Head and lessons learned from his self-experiment on radial nerve transection.

    PubMed

    Lenfest, Stephen M; Vaduva-Nemes, Andreea; Okun, Michael S

    2011-02-01

    In this paper the authors aim to review Dr. Henry Head's famous and dramatic nerve sectioning experiment. They discuss the implications of his experimental approach as well as the effect his experiment had on the field of neurology. Henry Head was a prominent British neurologist who contributed greatly to the understanding of the sensory examination through an experiment in which he had his own radial nerve transected. Head carefully documented the sensory changes following the sectioning. He hypothesized the existence of two separate sensory systems: protopathic and epicritic. Head was one of the first scientists to speculate on sensory dissociation, and his writings generated both enthusiasm and controversy. Although the ethical issue of self-experimentation was raised by his bold experiment and many aspects of his investigations and conclusions have been criticized, Head undoubtedly contributed important clinical lessons to neurology. Arguably, Henry Head's greatest contribution was the realization that the neurological portion of the sensory examination was anything but straightforward.

  18. Agreement Between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers, Local 1650, 1973-75.

    ERIC Educational Resources Information Center

    Henry Ford Community Coll., Dearborn, MI.

    This agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers, Local 1650 covers the period of 1973-1975. Contents of the agreement cover recognition, board of trustee rights, union-board relations, conditions of employment, seniority, the…

  19. Agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers Local 1650, 1987-1990.

    ERIC Educational Resources Information Center

    Henry Ford Community Coll., Dearborn, MI.

    This collective bargaining agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers establishes conditions of employment for all full-time teachers, counselors, librarians, placement officers, and selected other professional personnel. The articles in the agreement set…

  20. Agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers Local 1650, 1987-1990.

    ERIC Educational Resources Information Center

    Henry Ford Community Coll., Dearborn, MI.

    This collective bargaining agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers establishes conditions of employment for all full-time teachers, counselors, librarians, placement officers, and selected other professional personnel. The articles in the agreement set…

  1. Taxing junk food: applying the logic of the Henry tax review to food.

    PubMed

    Bond, Molly E; Williams, Michael J; Crammond, Brad; Loff, Bebe

    2010-10-18

    The recent review of taxation in Australia - the Henry tax review - has recommended that the federal government increase the taxes already levied on tobacco and alcohol. Tobacco and alcohol taxes are put forward as the best way of reducing the social harms caused by the use and misuse of these substances. Junk foods have the same pattern of misuse and the same social costs as tobacco and alcohol. The Henry tax review rejects the idea of taxing fatty foods, and to date the government has not implemented a tax on junk food. We propose that a tax on junk food be implemented as a tool to reduce consumption and address the obesity epidemic.

  2. 76 FR 50171 - Notice of Intent To Prepare an Environmental Impact Statement for the Henrys Fork Salinity...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-12

    ... the Henrys Fork Salinity Control Project Plan, Sweetwater and Uinta Counties, WY; Daggett and Summit... Statement (EIS) for the Henrys Fork Salinity Control Project Plan (SCPP). The NRCS will be the lead agency... Improvements'' alternative assumes a salinity control project will be implemented. Existing financial and...

  3. Conflict, Retrenchment, and Reappraisal: The Administration of Higher Education. The David D. Henry Lectures, 1972-78.

    ERIC Educational Resources Information Center

    1979

    The first five David D. Henry lectures, and discussion and response to the first four, are presented in this book. Following a brief introduction by John E. Corbally and a biography of David Dobbs Henry, Clark Kerr's paper, "The Administration of Higher Education in an Era of Change and Conflict" (presented in October, 1972) focuses on…

  4. 77 FR 836 - Norfolk Southern Railway Company-Abandonment Exemption-in Henry and Spalding Counties, GA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-06

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Surface Transportation Board Norfolk Southern Railway Company--Abandonment Exemption--in Henry and... milepost 9.72 M (east of Trestle Road in Locust Grove), in Henry and Spalding Counties, Ga. The line...

  5. Redshift in Hubble's constant.

    NASA Astrophysics Data System (ADS)

    Temple-Raston, M.

    1997-01-01

    A topological field theory with Bogomol'nyi solitons is examined. The Bogomol'nyi solitons have much in common with the instanton in Yang-Mills theory; consequently the author called them 'topological instantons'. When periodic boundary conditions are imposed, the field theory comments indirectly on the speed of light within the theory. In this particular model the speed of light is not a universal constant. This may or may not be relevant to the current debate in astronomy and cosmology over the large values of the Hubble constant obtained by the latest generation of ground- and space-based telescopes. An experiment is proposed to detect spatial variation in the speed of light.

  6. Wall of fundamental constants

    SciTech Connect

    Olive, Keith A.; Peloso, Marco; Uzan, Jean-Philippe

    2011-02-15

    We consider the signatures of a domain wall produced in the spontaneous symmetry breaking involving a dilatonlike scalar field coupled to electromagnetism. Domains on either side of the wall exhibit slight differences in their respective values of the fine-structure constant, {alpha}. If such a wall is present within our Hubble volume, absorption spectra at large redshifts may or may not provide a variation in {alpha} relative to the terrestrial value, depending on our relative position with respect to the wall. This wall could resolve the contradiction between claims of a variation of {alpha} based on Keck/Hires data and of the constancy of {alpha} based on Very Large Telescope data. We derive the properties of the wall and the parameters of the underlying microscopic model required to reproduce the possible spatial variation of {alpha}. We discuss the constraints on the existence of the low-energy domain wall and describe its observational implications concerning the variation of the fundamental constants.

  7. Percolation with Constant Freezing

    NASA Astrophysics Data System (ADS)

    Mottram, Edward

    2014-06-01

    We introduce and study a model of percolation with constant freezing ( PCF) where edges open at constant rate , and clusters freeze at rate independently of their size. Our main result is that the infinite volume process can be constructed on any amenable vertex transitive graph. This is in sharp contrast to models of percolation with freezing previously introduced, where the limit is known not to exist. Our interest is in the study of the percolative properties of the final configuration as a function of . We also obtain more precise results in the case of trees. Surprisingly the algebraic exponent for the cluster size depends on the degree, suggesting that there is no lower critical dimension for the model. Moreover, even for , it is shown that finite clusters have algebraic tail decay, which is a signature of self organised criticality. Partial results are obtained on , and many open questions are discussed.

  8. Constant-pressure Blowers

    NASA Technical Reports Server (NTRS)

    Sorensen, E

    1940-01-01

    The conventional axial blowers operate on the high-pressure principle. One drawback of this type of blower is the relatively low pressure head, which one attempts to overcome with axial blowers producing very high pressure at a given circumferential speed. The Schicht constant-pressure blower affords pressure ratios considerably higher than those of axial blowers of conventional design with approximately the same efficiency.

  9. The Hubble Constant.

    PubMed

    Jackson, Neal

    2015-01-01

    I review the current state of determinations of the Hubble constant, which gives the length scale of the Universe by relating the expansion velocity of objects to their distance. There are two broad categories of measurements. The first uses individual astrophysical objects which have some property that allows their intrinsic luminosity or size to be determined, or allows the determination of their distance by geometric means. The second category comprises the use of all-sky cosmic microwave background, or correlations between large samples of galaxies, to determine information about the geometry of the Universe and hence the Hubble constant, typically in a combination with other cosmological parameters. Many, but not all, object-based measurements give H0 values of around 72-74 km s(-1) Mpc(-1), with typical errors of 2-3 km s(-1) Mpc(-1). This is in mild discrepancy with CMB-based measurements, in particular those from the Planck satellite, which give values of 67-68 km s(-1) Mpc(-1) and typical errors of 1-2 km s(-1) Mpc(-1). The size of the remaining systematics indicate that accuracy rather than precision is the remaining problem in a good determination of the Hubble constant. Whether a discrepancy exists, and whether new physics is needed to resolve it, depends on details of the systematics of the object-based methods, and also on the assumptions about other cosmological parameters and which datasets are combined in the case of the all-sky methods.

  10. Varying constants quantum cosmology

    SciTech Connect

    Leszczyńska, Katarzyna; Balcerzak, Adam; Dabrowski, Mariusz P. E-mail: abalcerz@wmf.univ.szczecin.pl

    2015-02-01

    We discuss minisuperspace models within the framework of varying physical constants theories including Λ-term. In particular, we consider the varying speed of light (VSL) theory and varying gravitational constant theory (VG) using the specific ansätze for the variability of constants: c(a) = c{sub 0} a{sup n} and G(a)=G{sub 0} a{sup q}. We find that most of the varying c and G minisuperspace potentials are of the tunneling type which allows to use WKB approximation of quantum mechanics. Using this method we show that the probability of tunneling of the universe ''from nothing'' (a=0) to a Friedmann geometry with the scale factor a{sub t} is large for growing c models and is strongly suppressed for diminishing c models. As for G varying, the probability of tunneling is large for G diminishing, while it is small for G increasing. In general, both varying c and G change the probability of tunneling in comparison to the standard matter content (cosmological term, dust, radiation) universe models.

  11. New Quasar Studies Keep Fundamental Physical Constant Constant

    NASA Astrophysics Data System (ADS)

    2004-03-01

    Very Large Telescope sets stringent limit on possible variation of the fine-structure constant over cosmological time Summary Detecting or constraining the possible time variations of fundamental physical constants is an important step toward a complete understanding of basic physics and hence the world in which we live. A step in which astrophysics proves most useful. Previous astronomical measurements of the fine structure constant - the dimensionless number that determines the strength of interactions between charged particles and electromagnetic fields - suggested that this particular constant is increasing very slightly with time. If confirmed, this would have very profound implications for our understanding of fundamental physics. New studies, conducted using the UVES spectrograph on Kueyen, one of the 8.2-m telescopes of ESO's Very Large Telescope array at Paranal (Chile), secured new data with unprecedented quality. These data, combined with a very careful analysis, have provided the strongest astronomical constraints to date on the possible variation of the fine structure constant. They show that, contrary to previous claims, no evidence exist for assuming a time variation of this fundamental constant. PR Photo 07/04: Relative Changes with Redshift of the Fine Structure Constant (VLT/UVES) A fine constant To explain the Universe and to represent it mathematically, scientists rely on so-called fundamental constants or fixed numbers. The fundamental laws of physics, as we presently understand them, depend on about 25 such constants. Well-known examples are the gravitational constant, which defines the strength of the force acting between two bodies, such as the Earth and the Moon, and the speed of light. One of these constants is the so-called "fine structure constant", alpha = 1/137.03599958, a combination of electrical charge of the electron, the Planck constant and the speed of light. The fine structure constant describes how electromagnetic forces hold

  12. Probing Planck's Law at Home

    ERIC Educational Resources Information Center

    Bonnet, I.; Gabelli, J.

    2010-01-01

    We report on the physics around an incandescent lamp. Using a consumer-grade digital camera, we combine electrical and optical measurements to explore Planck's law of black-body radiation. This simple teaching experiment is successfully used to measure both Stefan's and Planck's constants. Our measurements lead to a strikingly accurate value for…

  13. Probing Planck's Law at Home

    ERIC Educational Resources Information Center

    Bonnet, I.; Gabelli, J.

    2010-01-01

    We report on the physics around an incandescent lamp. Using a consumer-grade digital camera, we combine electrical and optical measurements to explore Planck's law of black-body radiation. This simple teaching experiment is successfully used to measure both Stefan's and Planck's constants. Our measurements lead to a strikingly accurate value for…

  14. The Hubble Constant

    NASA Astrophysics Data System (ADS)

    Freedman, Wendy; Madore, Barry; Mager, Violet; Persson, Eric; Rigby, Jane; Sturch, Laura

    2008-12-01

    We present a plan to measure a value of the Hubble constant having a final systematic uncertainty of only 3% by taking advantage of Spitzer's unique mid-infrared capabilities. This involves using IRAC to undertake a fundamental recalibration of the Cepheid distance scale and progressively moving it out to pure Hubble flow by an application of a revised mid-IR Tully-Fisher relation. The calibration and application, in one coherent and self-consistent program, will go continuously from distances of parsecs to several hundred megaparsecs. It will provide a first-ever mid-IR calibration of Cepheids in the Milky Way, LMC and Key Project spiral galaxies and a first-ever measurement and calibration of the TF relation at mid-infrared wavelengths, and finally a calibration of Type Ia SNe. Most importantly this program will be undertaken with a single instrument, on a single telescope, working exclusively at mid-infrared wavelengths that are far removed from the obscuring effects of dust extinction. Using Spitzer in this focused way will effectively eliminate all of the major systematics in the Cepheid and TF distance scales that have been the limiting factors in all previous applications, including the HST Key Project. By executing this program, based exclusively on Spitzer data, we will deliver a value of the Hubble constant, having a statistical precision better than 11%, with all currently known systematics quantified and constrained to a level of less than 3%. A value of Ho determined to this level of systematic accuracy is required for up-coming cosmology experiments, including Planck. A more accurate value of the Hubble constant will directly result in other contingently measured cosmological parameters (e.g., Omega_m, Omega_L, & w) having their covariant uncertainties reduced significantly now. Any further improvements using this route will have to await JWST, for which this study is designed to provide a lasting and solid foundation, and ultimately a value of Ho

  15. Cosmology with varying constants.

    PubMed

    Martins, Carlos J A P

    2002-12-15

    The idea of possible time or space variations of the 'fundamental' constants of nature, although not new, is only now beginning to be actively considered by large numbers of researchers in the particle physics, cosmology and astrophysics communities. This revival is mostly due to the claims of possible detection of such variations, in various different contexts and by several groups. I present the current theoretical motivations and expectations for such variations, review the current observational status and discuss the impact of a possible confirmation of these results in our views of cosmology and physics as a whole.

  16. Birch's Law: Why Is It So Good?

    PubMed

    Chung, D H

    1972-07-21

    Birch's law arises in the physics of solids as a linear approximation, in a certain range of density, of a power law. For a change of chemical composition within the same crystal structure, the velocity-density relation is constant with a slope of nearly -0.5 in the first-order approximation.

  17. World Law.

    ERIC Educational Resources Information Center

    Marvin, David

    This consultant paper is intended to provide information useful to a goal of this curriculum development project in the war/peace field, that is to encourage students to search intelligently for alternatives to war. The most fundamental assumptions used in thinking about international law are described, including some assumptions about systemic…

  18. School Law.

    ERIC Educational Resources Information Center

    Splitt, David A.

    1982-01-01

    Summarizes three current issues in school law, including school district suits over potentially carcinogenic asbestos insulation, a California judge's finding that captionless educational television discriminates against hearing-impaired students, and the federal government's attempt to keep the Fairfax (Virginia) school system from charging…

  19. School Law.

    ERIC Educational Resources Information Center

    Splitt, David A.

    1982-01-01

    Summarizes three current issues in school law, including school district suits over potentially carcinogenic asbestos insulation, a California judge's finding that captionless educational television discriminates against hearing-impaired students, and the federal government's attempt to keep the Fairfax (Virginia) school system from charging…

  20. School Law.

    ERIC Educational Resources Information Center

    Splitt, David A.

    1987-01-01

    The United States Supreme Court upheld a California state law requiring employers to allow a pregnant woman up to four months of unpaid maternity leave if she claims pregnancy as a disability. A bill before Congress addresses parental leave and job protection for parents caring for a new baby or a sick child. (MLH)

  1. Neoliberalism, Democracy and the University as a Public Sphere: An Interview with Henry A. Giroux

    ERIC Educational Resources Information Center

    Harper, Victoria

    2014-01-01

    "Truthout" contributor, director of "Truthout's" Public Intellectual Project (truth-out.org/public-intellectual-project) and Truthout board member Henry A. Giroux responds to questions about how the excesses of neoliberal politics have reshaped and subverted the democratic mission of higher education.

  2. Wildfire rehabilitation success with and without chaining on the Henry Mountains, Utah

    Treesearch

    Cristina Juran; Bruce A. Roundy; James N. Davis

    2008-01-01

    We sampled unchained and chained areas in 2004 and 2005 on the Henry Mountains that had been aerially seeded after the Bulldog Fire of 2003. Establishment of seeded grasses was high on unchained and chained areas although chaining increased seeded grass establishment on some sites. Western yarrow established well on unchained areas. Initially, high seedling emergence...

  3. The Imaginary World of Henri Rousseau. Teacher's Guide. School Arts: Looking/Learning.

    ERIC Educational Resources Information Center

    Henderson, Anne

    While Henri Rousseau's work was not easily classified into any definitive artistic style of the time--impressionism, post-impressionism, fauvism, or cubism--it has been considered a forerunner of surrealism because of its dreamlike sensibility. This teaching guide provides information about Rousseau and his work, focusing on "Tropical Forest…

  4. Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois

    USGS Publications Warehouse

    Straub, Timothy D.; Johnson, Gary P.; Hortness, Jon E.; Parker, Joseph R.

    2009-01-01

    The Illinois Department of Natural Resources-Office of Water Resources operates control structures on a reach of the Fox River in northeastern Illinois between McHenry and Algonquin. The structures maintain water levels in the river for flood-control and recreational purposes. This report documents flow ratings for hinged-crest gates, a broad-crested weir, sluice gates, and an ogee spillway on the control structures at McHenry and Algonquin. The ratings were determined by measuring headwater and tailwater stage along with streamflow at a wide range of flows at different gate openings. Standard control-structure rating techniques were used to rate each control structure. The control structures at McHenry consist of a 221-feet(ft)-long broad-crested weir, a 4-ft-wide fish ladder, a 50-ft-wide hinged-crest gate, five 13.75-ft-wide sluice gates, and a navigational lock. Sixty measurements were used to rate the McHenry structures. The control structures at Algonquin consist of a 242-ft-long ogee spillway and a 50-ft-wide hinged-crest gate. Forty-one measurements were used to rate the Algonquin control structures.

  5. On New Rhetoric, John Henry Newman and the Language of Metaphors: Implications for Branding Higher Education

    ERIC Educational Resources Information Center

    Lawler-Brunner, Jennifer Lynne

    2012-01-01

    This project interprets how John Henry Newman's (1801-1890) system of thought informs the philosophical and theoretical grounds for rhetorical praxis in the marketplace. His seminal lessons in "An Essay in Aid of a Grammar of Assent" (1870) and "The Idea of a University" (1873 ed.) demonstrate the metaphoric power of words…

  6. Mounting a Curricular Revolution: An Interview with Henry Louis Gates, Jr.

    ERIC Educational Resources Information Center

    von Zastrow, Claus

    2009-01-01

    This article presents an interview with Henry Louis Gates, Jr., Harvard professor and cultural critic who has captured 25 million viewers with his PBS documentary series, African American Lives (WNET). Using genealogical research and DNA science, Gates traces the family history of 19 famous African Americans. What results is a rich and moving…

  7. The Rhetoric of Bishop Henry McNeal Turner, Renowned Speaker and Journalist.

    ERIC Educational Resources Information Center

    Cummings, Melbourne S.

    Bishop Henry McNeal Turner, a journalist and speaker, headed a back-to-Africa movement in the second half of the nineteenth century that was one of the first black rhetorical movements to meet the challenges of institutionalized racism in the United States. Turner was a preacher in the African Methodist Episcopal Church, becoming first an elder…

  8. Mounting a Curricular Revolution: An Interview with Henry Louis Gates, Jr.

    ERIC Educational Resources Information Center

    von Zastrow, Claus

    2009-01-01

    This article presents an interview with Henry Louis Gates, Jr., Harvard professor and cultural critic who has captured 25 million viewers with his PBS documentary series, African American Lives (WNET). Using genealogical research and DNA science, Gates traces the family history of 19 famous African Americans. What results is a rich and moving…

  9. The Science of Science: A Physicist Reads Barnes, Bloor and Henry.

    ERIC Educational Resources Information Center

    Mermin, N. David

    1998-01-01

    In their book entitled Scientific Knowledge, Barry Barnes, David Bloor, and John Henry repudiate the notion that physical environment plays no role in the creation of scientific knowledge, thereby removing a major bone of contention between scientists and practitioners of the sociology of scientific knowledge. A physicist discusses ways in which…

  10. Fin-de-Siecle Advances in Neuroeducation: Henry Herbert Donaldson and Reuben Post Halleck

    ERIC Educational Resources Information Center

    Theodoridou, Zoe D.; Triarhou, Lazaros C.

    2009-01-01

    This article focuses on two early attempts at bridging neuroscience and education, made by Henry Herbert Donaldson (1857-1938), a neurologist, and Reuben Post Halleck (1859-1936), an educator. Their works, respectively entitled "The Growth of the Brain: A Study of the Nervous System in Relation to Education" (1895) and "The Education of the…

  11. A new understanding of the first electromagnetic machine: Joseph Henry's vibrating motor

    NASA Astrophysics Data System (ADS)

    Littman, Michael G.; Stern, Lucas E.

    2011-02-01

    In 1831, Henry invented a battery-powered rocking-beam motor that he later described as the first electromagnetic machine. He repeatedly modified the design over his career, but only one version of a motor actually constructed by Henry is known to exist. This version is in a collection of Henry instruments at Princeton University. We found that the Princeton motor cannot have operated in the form that was displayed as early as 1884. We found evidence in several historical documents and in the instrument itself that the field magnet shown with the motor is a mistake. Instead of a single horizontal bar magnet, the motor was designed to use two elliptical magnets. We presume the error was made by whoever assembled the first public display. We modeled the dynamics of Henry's vibrating motor and compared our results to the operation of a replica motor. Modeling provides insight into how the motor is able to vibrate indefinitely even in the presence of energy loss due to friction.

  12. "Once More unto the Breach, Dear Friends": Shakespeare's "Henry V" as a Primer for Leaders.

    ERIC Educational Resources Information Center

    McCombs, Gillian M.

    1992-01-01

    The qualities of strong leadership and their applications in library administration are discussed in terms of Shakespeare's "Henry V." It is argued that, unlike the checklists found in management literature, timeless classic texts embody leadership qualities, dynamically illustrating their relevance and applicability. (10 references) (EA)

  13. Henry Evelyn Bliss--The Other Immortal, or a Prophet without Honour?

    ERIC Educational Resources Information Center

    Broughton, Vanda

    2008-01-01

    The paper takes a retrospective look at the work of Henry Evelyn Bliss, classificationist theorist and author of the "Bibliographic Classification". Major features of his writings and philosophy are examined and evaluated for the originality of their contribution to the corpus of knowledge in the discipline. Reactions to Bliss's work are analysed,…

  14. Development of a Career Student Guide for the Tech Prep Program for Henry County High School.

    ERIC Educational Resources Information Center

    Winchester, Ruth Ann

    This practicum report describes the research conducted in preparation for developing a career student guide to acquaint students attending Henry County High School (HCHS) in McDonough, Georgia, with the school's new tech prep program. Chapters 1 and 2 contain background information about HCHS' tech prep program and a review of literature regarding…

  15. The Henry Ford Academy: An Innovative Space for Teaching and Learning

    ERIC Educational Resources Information Center

    n/a, n/a

    2005-01-01

    Edith Graybill, English instructor at the Henry Ford Academy in Dearborn, Michigan, speaks about her school's English language arts curriculum, the influence of the school on the role of English language arts, the theories of teaching and learning used at the Academy, and other related topics. She believes that most of the students appreciate…

  16. Pre-Education Programs: A Comprehensive Project at Henry Ford Community College.

    ERIC Educational Resources Information Center

    Zopf, Deborah; Smyrski, Larry

    This document presents an overview of a four-year comprehensive pre-education project at Henry Ford Community College (HFCC) in Michigan. To meet the needs of school districts that preferred a 32-credit certificate program as well as districts that preferred a 60-unit associate degree, HFCC employed a career-ladder approach: A 32-credit…

  17. Intensive Language Instruction at a Small Liberal Arts College: The Dartmouth Model at Emory & Henry.

    ERIC Educational Resources Information Center

    Byrd, Charles W., Jr.

    1980-01-01

    Describes Emory & Henry College's adoption and succesful use of the Dartmouth method based on attraction of students to program, retention of students, enthusiasm of college community and improved performance of students when compared to proficiency of students in simultaneously taught traditional courses. (Author/BK)

  18. The Heuristic Method, Precursor of Guided Inquiry: Henry Armstrong and British Girls' Schools, 1890-1920

    ERIC Educational Resources Information Center

    Rayner-Canham, Geoff; Rayner-Canham, Marelene

    2015-01-01

    Though guided-inquiry learning, discovery learning, student-centered learning, and problem-based learning are commonly believed to be recent new approaches to the teaching of chemistry, in fact, the concept dates back to the late 19th century. Here, we will show that it was the British chemist, Henry Armstrong, who pioneered this technique,…

  19. Movement, Memory and Mathematics: Henri Bergson and the Ontology of Learning

    ERIC Educational Resources Information Center

    de Freitas, Elizabeth; Ferrara, Francesca

    2015-01-01

    Using the work of philosopher Henri Bergson (1859-1941) to examine the nature of movement and memory, this article contributes to recent research on the role of the body in learning mathematics. Our aim in this paper is to introduce the ideas of Bergson and to show how these ideas shed light on mathematics classroom activity. Bergson's monist…

  20. Neostusakia, a new name for preoccupied Stusakia Kment and Henry, 2008 (Hemiptera: Heteroptera: Berytidae)

    USDA-ARS?s Scientific Manuscript database

    A case of homonymy in the heteropteran family Berytidae is addressed. The genus Stusakia Kment and Henry, 2008 (Hemiptera) is preoccupied by Stusakia Frýda, 1998 (Mollusca: Gastropoda). As a consequence, the replacement name Neostusakia, new name, is proposed. In addition, the only two included s...

  1. Henry Evelyn Bliss--The Other Immortal, or a Prophet without Honour?

    ERIC Educational Resources Information Center

    Broughton, Vanda

    2008-01-01

    The paper takes a retrospective look at the work of Henry Evelyn Bliss, classificationist theorist and author of the "Bibliographic Classification". Major features of his writings and philosophy are examined and evaluated for the originality of their contribution to the corpus of knowledge in the discipline. Reactions to Bliss's work are analysed,…

  2. On New Rhetoric, John Henry Newman and the Language of Metaphors: Implications for Branding Higher Education

    ERIC Educational Resources Information Center

    Lawler-Brunner, Jennifer Lynne

    2012-01-01

    This project interprets how John Henry Newman's (1801-1890) system of thought informs the philosophical and theoretical grounds for rhetorical praxis in the marketplace. His seminal lessons in "An Essay in Aid of a Grammar of Assent" (1870) and "The Idea of a University" (1873 ed.) demonstrate the metaphoric power of words…

  3. View of Crew Commander Henry Hartsfield Jr. loading film into IMAX camera

    NASA Image and Video Library

    1984-09-08

    41D-11-004 (8 September 1984 --- View of Crew Commander Henry Hartsfield Jr. loading film into the IMAX camera during the 41-D mission. The camera is floating in front of the middeck lockers. Above it is a sticker of the University of Kansas mascott, the Jayhawk.

  4. Visualizing the Life and Legacy of Henry VIII: Guiding Students with Eight Types of Graphic Organizers

    ERIC Educational Resources Information Center

    Gallavan, Nancy P.; Kottler, Ellen

    2010-01-01

    Delving into the life and legacy of Henry VIII is both complex and captivating. People seem compelled to learn more abut his critical contributions and controversial conduct that range from the significant to the scandalous. Reflecting on the history of the world would be incomplete without investigating the events and escapades associated with…

  5. View of Crew Commander Henry Hartsfield Jr. loading film into IMAX camera

    NASA Technical Reports Server (NTRS)

    1984-01-01

    View of Crew Commander Henry Hartsfield Jr. loading film into the IMAX camera during the 41-D mission. The camera is floating in front of the middeck lockers. Above it is a sticker of the University of Kansas mascott, the Jayhawk.

  6. Astronaut Henry W. Harsfield, Jr. in suit donning/doffing exercise

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Astronaut Henry W. Harsfield, Jr., STS-4 pilot, takes part in a suit donning/doffing exercise aboard a KC-135 'zero-gravity' aircraft. Mission Specialist William F. Fisher, far left, stands ready to assist in the exercise. Hartsfield is wearing an extravehicular mobility unit (EMU) minus gloves and helmet.

  7. The new chemical insight for understanding the mechanism of Henry reaction over Cu(II) catalyst

    NASA Astrophysics Data System (ADS)

    Chen, Zhe-Ning; Wang, Kangli; Cui, Deng; Wu, Anan

    2017-04-01

    In this work, we present an alternative mechanism without the initial coordination of reactant and catalyst for the asymmetric Henry reaction over Cu(II) catalyst. Our calculations show that the re-coordination of acetate and Cu center is essential for the enantioselectivity. Thus, any effect of the re-coordination process would affect the enantioselectivity for this reaction.

  8. High School Decision-Making at Henry Lord Middle School in Fall River

    ERIC Educational Resources Information Center

    Bronhard, Aimee A.

    2012-01-01

    The purpose of this qualitative study was to investigate how students at Henry Lord Middle School in Fall River take into consideration their initial college and career aspirations when making their decision for high school. Self-efficacy theory, critical theory, and a literature review related to high school decision-making inform the analysis of…

  9. 2004 Foster G. McGaw Prize. Winner: Henry Ford Health System, Detroit, Michigan.

    PubMed

    Rollins, Gina

    2005-04-01

    Henry Ford Health System's commitment to community service took root with its founding in 1915 and has been embraced by leaders ever since. Wide-ranging efforts of school health programs offering grief support for children earned it the 2004 McGaw Prize.

  10. Detroit's Henry Ford Health System awarded Foster G. McGaw Prize.

    PubMed

    Rees, Tom

    2005-01-01

    Henry Ford Health System, Detroit, is named winner of the prestigious Foster G. McGaw Prize for excellence in community service. The organization received 100,000 dollars from the sponsors, the American Hospital Association, The Baxter International Foundation and the Cardinal Health Foundation.

  11. Neoliberalism, Democracy and the University as a Public Sphere: An Interview with Henry A. Giroux

    ERIC Educational Resources Information Center

    Harper, Victoria

    2014-01-01

    "Truthout" contributor, director of "Truthout's" Public Intellectual Project (truth-out.org/public-intellectual-project) and Truthout board member Henry A. Giroux responds to questions about how the excesses of neoliberal politics have reshaped and subverted the democratic mission of higher education.

  12. Community Arts Programs: Cohesion and Difference Case Studies. Henry Street Settlement and El Museo del Barrio

    ERIC Educational Resources Information Center

    Kiebert-Gruen, Cathleen

    2009-01-01

    A comparative case study of two cultural institutions, Henry Street Settlement and El Museo del Barrio, founded almost eighty years apart, were involved in social justice causes and community arts. Although both of these institutions participated in the political activism of their time, they also demonstrated an important adaptability. They were…

  13. Visualizing the Life and Legacy of Henry VIII: Guiding Students with Eight Types of Graphic Organizers

    ERIC Educational Resources Information Center

    Gallavan, Nancy P.; Kottler, Ellen

    2010-01-01

    Delving into the life and legacy of Henry VIII is both complex and captivating. People seem compelled to learn more abut his critical contributions and controversial conduct that range from the significant to the scandalous. Reflecting on the history of the world would be incomplete without investigating the events and escapades associated with…

  14. Community Arts Programs: Cohesion and Difference Case Studies. Henry Street Settlement and El Museo del Barrio

    ERIC Educational Resources Information Center

    Kiebert-Gruen, Cathleen

    2009-01-01

    A comparative case study of two cultural institutions, Henry Street Settlement and El Museo del Barrio, founded almost eighty years apart, were involved in social justice causes and community arts. Although both of these institutions participated in the political activism of their time, they also demonstrated an important adaptability. They were…

  15. The Rhetoric of Bishop Henry McNeal Turner, Renowned Speaker and Journalist.

    ERIC Educational Resources Information Center

    Cummings, Melbourne S.

    Bishop Henry McNeal Turner, a journalist and speaker, headed a back-to-Africa movement in the second half of the nineteenth century that was one of the first black rhetorical movements to meet the challenges of institutionalized racism in the United States. Turner was a preacher in the African Methodist Episcopal Church, becoming first an elder…

  16. Fin-de-Siecle Advances in Neuroeducation: Henry Herbert Donaldson and Reuben Post Halleck

    ERIC Educational Resources Information Center

    Theodoridou, Zoe D.; Triarhou, Lazaros C.

    2009-01-01

    This article focuses on two early attempts at bridging neuroscience and education, made by Henry Herbert Donaldson (1857-1938), a neurologist, and Reuben Post Halleck (1859-1936), an educator. Their works, respectively entitled "The Growth of the Brain: A Study of the Nervous System in Relation to Education" (1895) and "The Education of the…

  17. High School Decision-Making at Henry Lord Middle School in Fall River

    ERIC Educational Resources Information Center

    Bronhard, Aimee A.

    2012-01-01

    The purpose of this qualitative study was to investigate how students at Henry Lord Middle School in Fall River take into consideration their initial college and career aspirations when making their decision for high school. Self-efficacy theory, critical theory, and a literature review related to high school decision-making inform the analysis of…

  18. Henry David Thoreau, Martin Luther King Jr., and the American Tradition of Protest.

    ERIC Educational Resources Information Center

    Powell, Brent

    1995-01-01

    Maintains that Henry David Thoreau and Martin Luther King, Jr. fundamentally altered the tradition of protest and reform. Compares and contrasts the role of each man in U.S. social and constitutional history. Concludes that while Thoreau lacked the broad influence of King, his writings influenced both King and Mohandas Gandhi. (CFR)

  19. Henry Herbert Goddard and the Politics of Mental Measurement (1910-1920).

    ERIC Educational Resources Information Center

    Gonzalves, Linda

    The history of the study of human mental ability is an example of the dialectic in social science between those who interpret data within the framework of existing social inequities and those who look for perspectives that might eventually dissolve inequities. The dedication of Henry Herbert Goddard to a belief in the scientific proof of…

  20. Astronaut Henry W. Harsfield, Jr. in suit donning/doffing exercise

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Astronaut Henry W. Harsfield, Jr., STS-4 pilot, takes part in a suit donning/doffing exercise aboard a KC-135 'zero-gravity' aircraft. Mission Specialist William F. Fisher, far left, stands ready to assist in the exercise. Hartsfield is wearing an extravehicular mobility unit (EMU) minus gloves and helmet.

  1. James McHenry: Soldier-Statesmen of the Constitution. A Bicentennial Series, No. 4.

    ERIC Educational Resources Information Center

    Army Center of Military History, Washington, DC.

    Less than five years after his first landing in the American colonies, James McHenry, a well-education Scots-Irish immigrant, was serving with the Continental Army outside Boston (Massachusetts), and his military experience led him into a lengthy career of public service where he forcefully and consistently upheld the ideal of a strong central…

  2. Pickering, Edward Charles (1846-1919) and Pickering, William Henry (1858-1938)

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    Astronomers—two brothers. Born in Boston, MA, Edward became director of the Harvard College Observatory and observed the brightnesses of 45 000 stars. He hired a number of women, including WILLIAMINA P FLEMING, ANNIE J CANNON, Antonia Maury and HENRIETTA LEAVITT, and produced the Henry Draper Catalog, classifying the spectra of hundreds of thousands of stars. He and HERMANN CARL VOGEL independent...

  3. The Heuristic Method, Precursor of Guided Inquiry: Henry Armstrong and British Girls' Schools, 1890-1920

    ERIC Educational Resources Information Center

    Rayner-Canham, Geoff; Rayner-Canham, Marelene

    2015-01-01

    Though guided-inquiry learning, discovery learning, student-centered learning, and problem-based learning are commonly believed to be recent new approaches to the teaching of chemistry, in fact, the concept dates back to the late 19th century. Here, we will show that it was the British chemist, Henry Armstrong, who pioneered this technique,…

  4. [Portrait of a Confederate secret agent: the dentis Henry A. Parr].

    PubMed

    Hyson, J M; Swanson, B Z

    1998-11-01

    Dr. Henry A. Parr had many aspects in his career, beginning life as secret confederate agent during the Civil War, and finally ending as the president's dentist. The way he played these roles, as a pirate, accused of murder, as a pharmacist, inventor and dental teacher, makes up a real odysey, well documented.

  5. Fort McHenry National Monument and Historic Shrine. Teacher's Guide.

    ERIC Educational Resources Information Center

    Rogers, Jim

    This teacher's guide explores Fort McHenry and the British attack on Baltimore Harbor (Maryland) in 1814. The guide contains 11 lessons: (1) "Where in the World Is Baltimore?" (no handout-use classroom resources); (2) "Why Baltimore?" (Handout-Why Baltimore?); (3) "Now Where Do We Place the Fort?" (Handout-Map of…

  6. Henri Matisse: Color and Light. Teacher's Guide. School Arts: Looking/Learning.

    ERIC Educational Resources Information Center

    Brenner, Carla

    Henri Matisse painted "Open Window, Collioure" in the summer of 1905, when he and Andre Derain worked together in Collioure (France), a small Mediterranean fishing port near the Spanish border. This teaching guide discusses the painting "Open Window, Collioure" and Matisse's use of light and vibrant color. The guide provides…

  7. Enter the Madcap Prince of Wales: Students Directing "Henry IV, Part I."

    ERIC Educational Resources Information Center

    Earthman, Elise Ann

    1993-01-01

    Argues that William Shakespeare's "Henry IV, Part I" is an appropriate and useful text for secondary English classrooms. Shows how the play lends itself to performance-based instruction. Outlines ways of accomplishing student engagement, using film versions, and assigning written work. (HB)

  8. Henry Giroux and the Politics of Higher Education under George W. Bush: An Interview

    ERIC Educational Resources Information Center

    Pozo, Mike Alexander

    2005-01-01

    In May of 2004 Henry Giroux, a creator of the field of critical pedagogy and a leading advocate for young people, democracy, and education in the United States, reluctantly left Penn State University after twelve years as a Distinguished Professor in the education department. He has been a critic of the corporatization of and conservative…

  9. Henry Giroux and the Politics of Higher Education under George W. Bush: An Interview

    ERIC Educational Resources Information Center

    Pozo, Mike Alexander

    2005-01-01

    In May of 2004 Henry Giroux, a creator of the field of critical pedagogy and a leading advocate for young people, democracy, and education in the United States, reluctantly left Penn State University after twelve years as a Distinguished Professor in the education department. He has been a critic of the corporatization of and conservative…

  10. Henry Herbert Goddard and the Politics of Mental Measurement (1910-1920).

    ERIC Educational Resources Information Center

    Gonzalves, Linda

    The history of the study of human mental ability is an example of the dialectic in social science between those who interpret data within the framework of existing social inequities and those who look for perspectives that might eventually dissolve inequities. The dedication of Henry Herbert Goddard to a belief in the scientific proof of…

  11. Dissolved-Solids Load in Henrys Fork Upstream from the Confluence with Antelope Wash, Wyoming, Water Years 1970-2009

    USGS Publications Warehouse

    Foster, Katharine; Kenney, Terry A.

    2010-01-01

    Annual dissolved-solids load at the mouth of Henrys Fork was estimated by using data from U.S. Geological Survey streamflow-gaging station 09229500, Henrys Fork near Manila, Utah. The annual dissolved-solids load for water years 1970-2009 ranged from 18,300 tons in 1977 to 123,300 tons in 1983. Annual streamflows for this period ranged from 14,100 acre-feet in 1977 to 197,500 acre-feet in 1983. The 25-percent trimmed mean dissolved-solids load for water years 1970-2009 was 44,300 tons per year at Henrys Fork near Manila, Utah. Previous simulations using a SPAtially Referenced Regression On Watershed attributes (SPARROW) model for dissolved solids specific to water year 1991 conditions in the Upper Colorado River Basin predicted an annual dissolved-solids load of 25,000 tons for the Henrys Fork Basin upstream from Antelope Wash. On the basis of computed dissolved-solids load data from Henrys Fork near Manila, Utah, together with estimated annual dissolved-solids load from Antelope Wash and Peoples Canal, this prediction was adjusted to 37,200 tons. As determined by simulations with the Upper Colorado River Basin SPARROW model, approximately 56 percent (14,000 tons per year) of the dissolved-solids load at Henrys Fork upstream from Antelope Wash is associated with the 21,500 acres of irrigated agricultural lands in the upper Henrys Fork Basin.

  12. Unitaxial constant velocity microactuator

    DOEpatents

    McIntyre, Timothy J.

    1994-01-01

    A uniaxial drive system or microactuator capable of operating in an ultra-high vacuum environment. The mechanism includes a flexible coupling having a bore therethrough, and two clamp/pusher assemblies mounted in axial ends of the coupling. The clamp/pusher assemblies are energized by voltage-operated piezoelectrics therewithin to operatively engage the shaft and coupling causing the shaft to move along its rotational axis through the bore. The microactuator is capable of repeatably positioning to sub-manometer accuracy while affording a scan range in excess of 5 centimeters. Moreover, the microactuator generates smooth, constant velocity motion profiles while producing a drive thrust of greater than 10 pounds. The system is remotely controlled and piezoelectrically driven, hence minimal thermal loading, vibrational excitation, or outgassing is introduced to the operating environment.

  13. The Hubble Constant.

    PubMed

    Jackson, Neal

    2007-01-01

    I review the current state of determinations of the Hubble constant, which gives the length scale of the Universe by relating the expansion velocity of objects to their distance. In the last 20 years, much progress has been made and estimates now range between 60 and 75 km s(-1) Mpc(-1), with most now between 70 and 75 km s(-1) Mpc(-1), a huge improvement over the factor-of-2 uncertainty which used to prevail. Further improvements which gave a generally agreed margin of error of a few percent rather than the current 10% would be vital input to much other interesting cosmology. There are several programmes which are likely to lead us to this point in the next 10 years.

  14. When constants are important

    SciTech Connect

    Beiu, V.

    1997-04-01

    In this paper the authors discuss several complexity aspects pertaining to neural networks, commonly known as the curse of dimensionality. The focus will be on: (1) size complexity and depth-size tradeoffs; (2) complexity of learning; and (3) precision and limited interconnectivity. Results have been obtained for each of these problems when dealt with separately, but few things are known as to the links among them. They start by presenting known results and try to establish connections between them. These show that they are facing very difficult problems--exponential growth in either space (i.e. precision and size) and/or time (i.e., learning and depth)--when resorting to neural networks for solving general problems. The paper will present a solution for lowering some constants, by playing on the depth-size tradeoff.

  15. A Constant Pressure Bomb

    NASA Technical Reports Server (NTRS)

    Stevens, F W

    1924-01-01

    This report describes a new optical method of unusual simplicity and of good accuracy suitable to study the kinetics of gaseous reactions. The device is the complement of the spherical bomb of constant volume, and extends the applicability of the relationship, pv=rt for gaseous equilibrium conditions, to the use of both factors p and v. The method substitutes for the mechanical complications of a manometer placed at some distance from the seat of reaction the possibility of allowing the radiant effects of reaction to record themselves directly upon a sensitive film. It is possible the device may be of use in the study of the photoelectric effects of radiation. The method makes possible a greater precision in the measurement of normal flame velocities than was previously possible. An approximate analysis shows that the increase of pressure and density ahead of the flame is negligible until the velocity of the flame approaches that of sound.

  16. The Hubble constant.

    PubMed

    Tully, R B

    1993-06-01

    Five methods of estimating distances have demonstrated internal reproducibility at the level of 5-20% rms accuracy. The best of these are the cepheid (and RR Lyrae), planetary nebulae, and surface-brightness fluctuation techniques. Luminosity-line width and Dn-sigma methods are less accurate for an individual case but can be applied to large numbers of galaxies. The agreement is excellent between these five procedures. It is determined that Hubble constant H0 = 90 +/- 10 km.s-1.Mpc-1 [1 parsec (pc) = 3.09 x 10(16) m]. It is difficult to reconcile this value with the preferred world model even in the low-density case. The standard model with Omega = 1 may be excluded unless there is something totally misunderstood about the foundation of the distance scale or the ages of stars.

  17. The Hubble constant.

    PubMed Central

    Tully, R B

    1993-01-01

    Five methods of estimating distances have demonstrated internal reproducibility at the level of 5-20% rms accuracy. The best of these are the cepheid (and RR Lyrae), planetary nebulae, and surface-brightness fluctuation techniques. Luminosity-line width and Dn-sigma methods are less accurate for an individual case but can be applied to large numbers of galaxies. The agreement is excellent between these five procedures. It is determined that Hubble constant H0 = 90 +/- 10 km.s-1.Mpc-1 [1 parsec (pc) = 3.09 x 10(16) m]. It is difficult to reconcile this value with the preferred world model even in the low-density case. The standard model with Omega = 1 may be excluded unless there is something totally misunderstood about the foundation of the distance scale or the ages of stars. PMID:11607391

  18. Unitaxial constant velocity microactuator

    DOEpatents

    McIntyre, T.J.

    1994-06-07

    A uniaxial drive system or microactuator capable of operating in an ultra-high vacuum environment is disclosed. The mechanism includes a flexible coupling having a bore therethrough, and two clamp/pusher assemblies mounted in axial ends of the coupling. The clamp/pusher assemblies are energized by voltage-operated piezoelectrics therewithin to operatively engage the shaft and coupling causing the shaft to move along its rotational axis through the bore. The microactuator is capable of repeatably positioning to sub-nanometer accuracy while affording a scan range in excess of 5 centimeters. Moreover, the microactuator generates smooth, constant velocity motion profiles while producing a drive thrust of greater than 10 pounds. The system is remotely controlled and piezoelectrically driven, hence minimal thermal loading, vibrational excitation, or outgassing is introduced to the operating environment. 10 figs.

  19. Bode's Law

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    A numerical sequence which is roughly in proportion to the distances of the major planets from the Sun. It is named after Johann Bode, who announced it in 1772; it is more properly referred to as the Titius-Bode law, as it was first put forward by Johann Titius six years previously. The sequence is formed by taking 0 and 3, doubling 3 to give 6, doubling 6 to give 12, and so on, then adding 4 to ...

  20. Stigma law.

    PubMed

    1998-10-30

    Massachusetts enacted a law, called House No. 2099, that relieves real estate brokers from liability for not disclosing the history of a property to a potential buyer. The statute says that certain information does not need to be disclosed in a real estate transaction. Such information includes whether any previous occupants had HIV/AIDS or any other disease that is unlikely to be transmitted casually.