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Go To: Top, Constants of diatomic molecules, References, Notes / Error Report
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - E.P. Hunter and S.G. Lias
L - S.G. Lias
Data compiled as indicated in comments:
B - J.E. Bartmess
LL - S.G. Lias and J.F. Liebman
LBLHLM - S.G. Lias, J.E. Bartmess, J.F. Liebman, J.L. Holmes, R.D. Levin, and W.G. Mallard
LLK - S.G. Lias, R.D. Levin, and S.A. Kafafi
RDSH - H.M. Rosenstock, K. Draxl, B.W. Steiner, and J.T. Herron
View reactions leading to HO+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 13.017 ± 0.002 | eV | N/A | N/A | L |
| Quantity | Value | Units | Method | Reference | Comment |
| Proton affinity (review) | 593.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 564.0 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.8277 | LPD | Smith, Kim, et al., 1997 | Given: 14741.02(3) cm-1; B |
| 1.827669 ± 0.000044 | LPD | Schulz, Mead, et al., 1982 | Given: 1.82767±0.00021 eV; B |
| 1.829 ± 0.010 | LPES | Celotta, Bennett, et al., 1974 | B |
| 1.8250 ± 0.0020 | LPD | Hotop, Patterson, et al., 1974 | B |
| 1.830 ± 0.040 | PD | Branscomb, 1966 | B |
| 1.80 ± 0.20 | EIAE | Tsuda and Hamill, 1964 | From MeOH,EtOH,nPrOH; B |
| 1.89 ± 0.12 | SI | Page and Goode, 1969 | The Magnetron method, lacking mass analysis, is not considered reliable.; B |
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 13.0170 ± 0.0002 | TE | Wiedmann, Tonkyn, et al., 1992 | LL |
| 13.01 | PE | Van Lonkhuyzen and De Lange, 1984 | LBLHLM |
| 12.88 | DER | Berkowitz, Appelman, et al., 1973 | LLK |
| 13.5 ± 1.0 | EI | Uy, Srivastava, et al., 1971 | LLK |
| 12.94 | DER | Dibeler, Walker, et al., 1966 | RDSH |
| 13.2 ± 0.1 | EI | Foner and Hudson, 1956 | RDSH |
| 13.01 | PE | Katsumata and Lloyd, 1977 | Vertical value; LLK |
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1601. | kJ/mol | D-EA | Neumark, Lykke, et al., 1985 | gas phase; Given: 1.461122(3) eV; revised to 1.4611107(17) eV, Blondel, 1995, based on missing term+86CODATA; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1576.1 ± 0.84 | kJ/mol | H-TS | Neumark, Lykke, et al., 1985 | gas phase; Given: 1.461122(3) eV; revised to 1.4611107(17) eV, Blondel, 1995, based on missing term+86CODATA; B |
Go To: Top, Gas phase ion energetics data, References, Notes / Error Report
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: K.P. Huber and G. Herzberg
| 1 | Spin splitting constants γ0 ...γ3 = +1.09...+0.67 Michel, 1957, Carlone and Dalby, 1969. |
| 2 | RKR potential functions Fallon, Tobias, et al., 1961, Horsley and Richards, 1969. |
| 3 | Lifetime of the upper state of the C→A system ~ 6 ns; measurements in the 1700-1900 region give τ ~2 ns which, in spite of the poor agreement, is not inconsistent with the assignment of at least part of these bands to C→X Smith and Stella, 1975. Much longer lifetimes (~ 80 ns) have been reported by Remy, 1971. |
| 4 | Franck-Condon factors Felenbok, 1963. |
| 5 | Strong many-line spectrum 1900-1700 Å, tentative identification. |
| 6 | Spin splitting constant γ0 = -0.293. |
| 7 | Theoretical oscillator strength f00 = 0.0036 Ray and Kelly, 1975. |
| 8 | Energy of N'=0 relative to the zero-point of the Hill-Van Vleck expression for the ground state. |
| 9 | Using isotope relations Barrow, 1956 estimates ωe = 940, ωexe = 105, ωeye = -21.5. |
| 10 | Spin splitting constant γ<0.03 Carlone and Dalby, 1969. Predissociation by rotation in v=0 above N=15, in v=1 above N=9; dissociation products 1S + 2S Felenbok, 1963, Carlone and Dalby, 1969. |
| 11 | B1 = 4.119. Constants for the B state are from Carlone and Dalby, 1969. |
| 12 | D1 ~ 29.1E-4, H1= -15E-5. |
| 13 | -1.7915(v+1/2)3 + 0.32362(v+1/2)4 - 0.03585(v+1/2)5 Barrow, 1956. Energy levels and improved ΔG(v+1/2) values are listed in Carlone and Dalby, 1969. |
| 14 | Spin splitting constants γ0 ... γ3 = 0.201, 0.196, 0.192, 0.193 Moore and Richards, 1971; see also Dieke and Crosswhite, 1948. |
| 15 | Predissociation in v=0 above N=23, in v=1 above N=14, and of all levels in v=2; from the lifetime measurements of Elmergreen and Smith, 1972, Anderson and Sutherland, 1973, German, 1975. A sharp decrease in the intensity of emission lines originating from the predissociated levels has been observed at or slightly above threshold in low pressure flames and discharges Gaydon and Wolfhard, 1951, Broida and Kane, 1953, Naegeli and Palmer, 1967; Charton and Gaydon, 1958 report corresponding intensity increases due to inverse predissociation in hydrogen flames; see also Gutman, Lutz, et al., 1968. The predissociation is noticeably stronger for the F1 than for the F2 levels; according to Palmer and Naegeli, 1968, Michels and Harris, 1969, Gaydon and Kopp, 1971, Anderson and Sutherland, 1973, Palmer and Naegeli, 1973, Smith, Elmergreen, et al., 1974, German, 1975 it is caused by the 4Σ- state arising from 3P + 2S, but the possibility of predissociation by the 2Π ground state has also been considered Durmaz and Murrell, 1971, Julienne, Krauss, et al., 1971. A much stronger predissociation of A 2Σ+ leading to diffuseness in the B→A bands has been observed Michel, 1957, Czarny and Felenbok, 1968, Carlone and Dalby, 1969 for v=5, 6, 7 at all N levels and for v=8 above N=6; according to Czarny, Felenbok, et al., 1971 it is produced by the 4Π state arising from 3P + 2S. |
| 16 | μel(v=0) = 1.98 D from high-field Stark effects on the A→X transition Scarl and Dalby, 1971. |
| 17 | The equilibrium constants were derived by Barrow, 1956 to fit Bv from v=0 to 4. Improved Bv values (v=0.. .3) have been obtained by Moore and Richards, 1971 from the data of Dieke and Crosswhite, 1948; additional Bv values for v≤9 are listed in Barrow, 1956, Michel, 1957, Felenbok, 1963, Carlone and Dalby, 1969. For term values (v=0...3) see Moore and Richards, 1971. |
| 18 | Other Dv values in Moore and Richards, 1971 and Barrow, 1956, Michel, 1957, Felenbok, 1963, Carlone and Dalby, 1969; H0 = 8.71E-8 Moore and Richards, 1971. |
| 19 | Radiative lifetimes τ(v=0,N=1) = 693 ± 10 ns, τ(v=l,N=1) = 736 ± 11 ns German, 1975. The increase from v=0 to v=1 and a similar variation with increasing rotation in v=0 [ German, 1975, see also Elmergreen and Smith, 1972, Anderson and Sutherland, 1973] are explained by the dependence on r of the transition moment [see German, 1975 and references given there]. Hogan and Davis, 1974 using a method very similar to German, 1975 obtain 720 765 ns for the average lifetimes of several low-lying rotational levels in v=0 and 1, respectively. Earlier apparently less accurate determinations Elmergreen and Smith, 1972, Becker and Haaks, 1973, Anderson and Sutherland, 1973, Becker, Haaks, et al., 1974, Brophy, Silver, et al., 1974 gave somewhat higher τ values [see also Bennett and Dalby, 1964]; Hanle effect measurements de Zafra, Marshall, et al., 1971, German, Bergeman, et al., 1973 are slightly lower. The decay time of the predissociated v=2 level (see 15) is 203 ± 13 ns for N=0 and decreases rapidly at higher N German, 1975; estimated non- radiative lifetime for N=1 ~ 270 ns. High-resolution line absorption measurements by Rouse and Engleman, 1973 [see also Golden, Del Greco, et al., 1963] give f00 = 0.00095 for the rotationless molecule in reasonable agreement with lifetime measurements but in sharp contrast to f00 = 0.00148 obtained by Anketell and Pery-Thorne, 1967 using the hook method; f10 values are, respectively, 0.00024 and 0.00089. |
| 20 | Observed in emission in all kinds of electric discharges (often as an impurity), in flames Krishnamachari and Broida, 1961 and in the heads of comets; in absorption in H2O vapour at high temperature Bonhoeffer and Reichardt, 1928 and in electric discharges Oldenberg, 1935, in flames Gaydon, Spokes, et al., 1960, in the flash photolysis of H2O, O3 + H2O, and other mixtures Basco and Norrish, 1961, Black and Porter, 1962, Horne and Norrish, 1967, and in stellar spectra, especially the solar spectrum Moore and Broida, 1959. Emission and absorption in solid neon Tinti, 1968. Atlas of A-X bands Bass and Broida, 1953, new measurements of the 0-0 and 1-0 bands Engleman, 1972. Magnetic rotation spectrum Nanes and Robinson, 1971. Franck-Condon factors Nicholls, 1956, Nicholls, Fraser, et al., 1959, Felenbok, 1963. Vibrational intensity distribution Dieke and Crosswhite, 1948, Crosley and Lengel, 1975; rotational intensity distribution Learner, 1962, Meinel, 1967; effect of variation of transition moment with r and dependence on J Anketell and Learner, 1967, Crosley and Lengel, 1975. |
| 21 | Av = -139.21 - 0.275v Maillard, Chauville, et al., 1976. |
| 22 | +0.5409(v+1/2)3 - 0.02134(v+1/2)4 - 0.00113(v+1/2)5, representing the vibrational levels up to v=5 Maillard, Chauville, et al., 1976; see also Herman and Hornbeck, 1953, Chamberlain and Roesler, 1955. ΔG(1/2) = 3569.640 Maillard, Chauville, et al., 1976. |
| 23 | Λ-type doubling parameters pv = 0.235 - 0.006v, qv = -0.0391 + 0.0018v, see Maillard, Chauville, et al., 1976 who give also centrifugal distortion terms. See 24. |
| 24 | +0.00706(v+1/2)2 - 0.00050(v+1/2)3, representing B0 ...B5 Maillard, Chauville, et al., 1976; slightly different constants in Herman and Hornbeck, 1953, Moore and Richards, 1971, Veseth, 1971, Mizushima, 1972. Term values for v≤3 tabulated in Dieke and Crosswhite, 1948, Moore and Richards, 1971, for v=4, 5, 6 in Herman and Hornbeck, 1953, for v=7, 8, 9 in Bass and Garvin, 1962. |
| 25 | -0.432E-4(v+1/2) + 0.024E-4(v+1/2)2; H0 = 14.2E-8 Maillard, Chauville, et al., 1976, see 24. |
| 26 | The 79 μm electric dipole spectrum (2Π1/2,J=1/2 ← 2Π3/2, J=3/2) has been measured by the laser magnetic resonance method. |
| 27 | Observed in emission in the spectrum of the night sky Meinel, 1950, Chamberlain and Roesler, 1955, Jones, 1955, Connes and Gush, 1959, Blackwell, Ingham, et al., 1960, in the H + O3 reaction McKinley, Garvin, et al., 1955, Kraus, 1957, Bass and Garvin, 1962, Murphy, 1971, in the H + O2 reaction Charters and Polanyi, 1960, and in oxyacetylene flames Benedict, Plyler, et al., 1953, Allen, Blaine, et al., 1957, Rogge, Yarger, et al., 1960, Maillard, Chauville, et al., 1976. In absorption in rare gas matrices Acquista, Schoen, et al., 1968. |
| 28 | Radiative lifetimes derived from observed intensities: τ(v=1) = 24 ms, τ(v=2) = 12 ms Roux, d'Incan, et al., 1973; from the decay rate of the 9→7 radiation: τ(v=9) = 64 ms Potter, Coltharp, et al., 1971. The dipole moment function has been studied by many authors, most recently by Ferguson and Parkinson, 1963, d'Incan, Effantin, et al., 1971, Murphy, 1971 and Roux, d'Incan, et al., 1973 from measured band strengths and transition probabilities. An extensive ab initio calculation of the dipole moment function is given by Stevens, Das, et al., 1974 [see also Chu, Yoshimine, et al., 1974]. Mies, 1974 has used this ab initio function to predict absolute intensities of a large array of vibration-rotation transitions taking account of spin uncoupling and vibration-rotation interaction [see also the early work of Heaps and Herzberg, 1952 and Cashion, 1963]. |
| 29 | The 18 cm transition (2Π3/2,J=3/2) consists of four components Ehrenstein, Townes, et al., 1959, Radford, 1964, ter Meulen and Dymanus, 1972: F'=1←F"=2 1612.23101 MHz F'=1←F"=1 1665.40184 MHz F'=2←F"=2 1667.35903 MHz F'=2←F"=1 1720.52998 MHz Einstein A coefficients for these transitions have been calculated by Turner, 1966. Calculated frequencies for 17OH Valtz and Soglasnova, 1973. |
| 30 | Hfs and Λ-doubling constants. From Stark shifts of the hf Λ-doubling transitions Powell and Lide, 1965, Meerts and Dymanus, 1973 determine μel(v=0) = 1.6676 D. |
| 31 | Also observed in interstellar clouds, see the reviews in Barrett, 1967, Robinson and McGee, 1967, Cook, 1969. In some clouds there is strong evidence for maser action. In the laboratory population inversion between Λ-doublet states was recently observed by ter Meulen, Meerts, et al., 1976. |
| 32 | Observed in v=0...9. Hyperfine and Λ-doubling constants. EPR spectrum of 17OH Carrington and Lucas, 1970. |
| 33 | Short extrapolation of the vibrational levels in A 2Σ+, assuming that this state has no potential maximum; confirmed by the observed predissociation in B 2Σ+ Carlone and Dalby, 1969. De = 4.621 eV, in complete agreement with the most recent theoretical value Arnold, Whiting, et al., 1976. |
| 34 | Photoionization mass-spectrometry of HOF Berkowitz, Appelman, et al., 1973; 13.01 eV from the photoelectron spectrum Katsumata and Lloyd, 1977. |
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, Notes / Error Report
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656. [doi:10.1063/1.556018]
[all data]
Smith, Kim, et al., 1997
Smith, J.R.; Kim, J.B.; Lineberger, W.C.,
High-resolution Threshold Photodetachment Spectroscopy of OH-,
Phys. Rev. A, 1997, 55, 2036. [all data]
Schulz, Mead, et al., 1982
Schulz, P.A.; Mead, R.D.; Jones, P.L.; Lineberger, W.C.,
OH- and OD- threshold photodetachment,
J. Chem. Phys., 1982, 77, 1153. [all data]
Celotta, Bennett, et al., 1974
Celotta, R.S.; Bennett, R.A.; Hall, J.L.,
Laser Photodetachment Determination of the Electron Affinities of OH, NH2, NH, SO2, and S2,
J. Chem. Phys., 1974, 60, 1740. [all data]
Hotop, Patterson, et al., 1974
Hotop, H.; Patterson, T.A.; Lineberger, W.C.,
High resolution photodetachment study of OH- and OD- in the threshold region 7000-6450 Å,
J. Chem. Phys., 1974, 60, 1806. [all data]
Branscomb, 1966
Branscomb, L.M.,
Photodetachment Cross Section, Electron Affinity, and Structure of the Negative Hydroxyl Ion,
Phys. Rev., 1966, 148, 11. [all data]
Tsuda and Hamill, 1964
Tsuda, S.; Hamill, W.H.,
Ionization Efficiency Measurements by the Retarding Potential Difference Method,
Adv. Mass Spectrom., 1964, 3, 249. [all data]
Page and Goode, 1969
Page, F.M.; Goode, G.C.,
Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]
Wiedmann, Tonkyn, et al., 1992
Wiedmann, R.T.; Tonkyn, R.G.; White, M.G.; Wang, K.; McKoy, V.,
Rotationally resolved threshold photoelectron spectra of OH and OD,
J. Chem. Phys., 1992, 97, 768. [all data]
Van Lonkhuyzen and De Lange, 1984
Van Lonkhuyzen, H.; De Lange, C.A.,
U. V. photoelectron spectroscopy of OH and OD radicals,
Mol. Phys., 1984, 51, 551. [all data]
Berkowitz, Appelman, et al., 1973
Berkowitz, J.; Appelman, E.H.; Chupka, W.A.,
Photoionization of HOF with mass analysis,
J. Chem. Phys., 1973, 58, 1950. [all data]
Uy, Srivastava, et al., 1971
Uy, O.M.; Srivastava, R.D.; Farber, M.,
Mass spectrometric determination of the heats of formation of gaseous BO2 BOF2,
High Temp. Sci., 1971, 3, 462. [all data]
Dibeler, Walker, et al., 1966
Dibeler, V.H.; Walker, J.A.; Rosenstock, H.M.,
Mass spectrometric study of photoionization. V.Water and ammonia,
J.Res. NBS, 1966, 70A, 459. [all data]
Foner and Hudson, 1956
Foner, S.N.; Hudson, R.L.,
Ionization potential of the OH free radical by mass spectrometry,
J. Chem. Phys., 1956, 25, 602. [all data]
Katsumata and Lloyd, 1977
Katsumata, S.; Lloyd, D.R.,
The photoelectron spectra of the OH and OD radicals,
Chem. Phys. Lett., 1977, 45, 519. [all data]
Neumark, Lykke, et al., 1985
Neumark, D.M.; Lykke, K.R.; Andersen, T.; Lineberger, W.C.,
Laser photodetachment measurement of the electron affinity of atomic oxygen,
Phys. Rev. A:, 1985, 32, 1890. [all data]
Blondel, 1995
Blondel, C.,
Recent experimental achievements with negative ions,
Phys. Scr., 1995, T58, 31. [all data]
Easson and Pryce, 1973
Easson, I.; Pryce, M.H.L.,
Calculated potential energy curves of OH,
Can. J. Phys., 1973, 51, 518. [all data]
Stevens, Das, et al., 1974
Stevens, W.J.; Das, G.; Wahl, A.C.; Krauss, M.; Neumann, D.,
Study of the ground state potential curve and dipole moment of OH by the method of optimized valence configurations,
J. Chem. Phys., 1974, 61, 3686. [all data]
Chu, Yoshimine, et al., 1974
Chu, S.-I.; Yoshimine, M.; Liu, B.,
Ab initio study of the X2Π and A2Σ+ states of OH. I. Potential curves and properties,
J. Chem. Phys., 1974, 61, 5389. [all data]
Meyer and Rosmus, 1975
Meyer, W.; Rosmus, P.,
PNO-Cl and CEPA studies of electron correlation effects. III. Spectroscopic constants and dipole moment functions for the ground states of the first-row and second-row diatomic hydrides,
J. Chem. Phys., 1975, 63, 2356. [all data]
Michel, 1957
Michel, A.,
Das C2Σ+ → A2Σ+-Bandensystem von OH,
Z. Naturforsch. A, 1957, 12, 887. [all data]
Felenbok, 1963
Felenbok, P.,
Contribution a l'etude du spectre moleculaire des radicaux OH et OD,
Ann. Astrophys., 1963, 26, 393. [all data]
Douglas, 1974
Douglas, A.E.,
Absorption of OH in the 1200 Å region,
Can. J. Phys., 1974, 52, 318. [all data]
Barrow, 1956
Barrow, R.F.,
The B2Σ+-A2Σ+ band-systems of OH and OD,
Ark. Fys., 1956, 11, 281. [all data]
Herman, Felenbok, et al., 1961
Herman, L.; Felenbok, P.; Herman, R.,
Spectre d'emission des radicaux OH et OD,
J. Phys. Radium, 1961, 22, 83. [all data]
Czarny, Felenbok, et al., 1971
Czarny, J.; Felenbok, P.; Lefebvre-Brion, H.,
High vibrational level predissociation in the A2Σ+ state of OD,
J. Phys. B:, 1971, 4, 124. [all data]
Dieke and Crosswhite, 1948
Dieke; Crosswhite,
Bumblebee Series, Johns Hopkins University (reference not verified), Rpt. No. 87, 1948, 1. [all data]
Stoebner and Delbourgo, 1967
Stoebner, A.; Delbourgo, R.,
Contribution a l'etude spectrographique de la sequence 0=2 de la transition A2Σ+ - X2Π du radical OH,
J. Chim. Phys. Phys.-Chim. Biol., 1967, 64, 1115. [all data]
Evenson, Wells, et al., 1970
Evenson, K.M.; Wells, J.S.; Radford, H.E.,
Infrared resonance of OH with the H2O laser: a galactic maser pump?,
Phys. Rev. Lett., 1970, 25, 199. [all data]
Mizushima, 1972
Mizushima, M.,
Molecular parameters of OH free radical,
Phys. Rev. A: Gen. Phys., 1972, 5, 143. [all data]
Allen, Blaine, et al., 1957
Allen, H.C., Jr.; Blaine, L.R.; Plyler, E.K.,
The emission spectrum of OH from 2-8 to 4-1 μ,
Spectrochim. Acta, 1957, 9, 126. [all data]
Charters and Polanyi, 1960
Charters, P.E.; Polanyi, J.C.,
An improved technique for the observation of infrared chemiluminescence: resolved infrared emission of OH arising from the system H + O2,
Can. J. Chem., 1960, 38, 1742. [all data]
Maillard, Chauville, et al., 1976
Maillard, J.P.; Chauville, J.; Mantz, A.W.,
High-resolution emission spectrum of OH in an oxyacetylene flame from 3.7 to 0.9 μm,
J. Mol. Spectrosc., 1976, 63, 120. [all data]
Benedict, Plyler, et al., 1953
Benedict, W.S.; Plyler, E.K.; Humphreys, C.J.,
The emission spectrum of OH from 1.4 to 1.7 μ,
J. Chem. Phys., 1953, 21, 398. [all data]
Rogge, Yarger, et al., 1960
Rogge, W.H.; Yarger, F.L.; Dickey, F.P.,
Emission spectrum of the OH radical in an oxyacetylene flame in the 1.5-μ region,
J. Chem. Phys., 1960, 33, 453. [all data]
Bass and Garvin, 1962
Bass, A.M.; Garvin, D.,
Analysis of the hydroxyl radical vibration rotation spectrum between 3900 Å and 11500 Å,
J. Mol. Spectrosc., 1962, 9, 114. [all data]
Herman and Hornbeck, 1953
Herman, R.C.; Hornbeck, G.A.,
Vibration-rotation bands of OH,
Astrophys. J., 1953, 118, 214. [all data]
Chamberlain and Roesler, 1955
Chamberlain, J.W.; Roesler, F.L.,
The OH bands in the infrared airglow,
Astrophys. J., 1955, 121, 541. [all data]
McKinley, Garvin, et al., 1955
McKinley, J.D., Jr.; Garvin, D.; Boudart, M.J.,
Production of excited hydroxyl radicals in the hydrogen atom-ozone reaction,
J. Chem. Phys., 1955, 23, 784. [all data]
Blackwell, Ingham, et al., 1960
Blackwell, D.E.; Ingham, M.F.; Rundle, H.N.,
The night-sky spectrum λλ 5000-6500 A,
Astrophys. J., 1960, 131, 15. [all data]
Madden and Benedict, 1955
Madden, R.P.; Benedict, W.S.,
Pure rotation lines of OH,
J. Chem. Phys., 1955, 23, 408. [all data]
Ducas and Javan, 1974
Ducas, T.W.; Javan, A.,
Measurement of microwave fine structure in OH infrared transitions using frequency mixing with metal-to-metal infrared diodes,
J. Chem. Phys., 1974, 60, 1677. [all data]
Downey, Robinson, et al., 1977
Downey, G.D.; Robinson, D.W.; Smith, J.H.,

A molecular beam electric resonance study of the hyperfine Λ doubling spectrum of OH, OD, SH, and SD,
Can. J. Phys., 1975, 53, 2123. [all data]
Meerts, 1977
Meerts, W.L.,
On the microwave spectrum of the X2Π state of the hydroxyl radical,
Chem. Phys. Lett., 1977, 46, 24. [all data]
Radford, 1961
Radford, H.E.,
Microwave Zeeman effect of free hydroxyl radicals,
Phys. Rev., 1961, 122, 114. [all data]
Churg and Levy, 1970
Churg, A.; Levy, D.H.,
The magnetic resonance spectrum of vibrationally excited OH and A prediciton of the radio-astronomy spectrum,
Astrophys. J., 1970, 162, 161. [all data]
Clough, Curran, et al., 1971
Clough, P.N.; Curran, A.H.; Thrush, B.A.,
The e.p.r. spectrum of vibrationally excited hydroxyl radicals,
Proc. R. Soc. London A, 1971, 323, 541. [all data]
Lee, Tam, et al., 1971
Lee, K.P.; Tam, W.G.; Larouche, R.; Woonton, G.A.,
Electron resonance of vibrationally excited OH radicals,
Can. J. Phys., 1971, 49, 2207. [all data]
Hinkley, Walker, et al., 1973
Hinkley, R.K.; Walker, T.E.H.; Richards, W.G.,
On the e.p.r. spectrum of vibrationally excited hydroxyl radicals,
Proc. R. Soc. London A, 1973, 331, 553. [all data]
Lee and Tam, 1974
Lee, K.P.; Tam, W.G.,
Molecular constants of vibrationally excited hydroxyl radical from electron paramagnetic resonance,
Chem. Phys., 1974, 4, 434. [all data]
Carlone and Dalby, 1969
Carlone, C.; Dalby, F.W.,
Spectrum of the hydroxyl radical,
Can. J. Phys., 1969, 47, 1945. [all data]
Fallon, Tobias, et al., 1961
Fallon, R.J.; Tobias, I.; Vanderslice, J.T.,
Potential energy curves for OH,
J. Chem. Phys., 1961, 34, 167. [all data]
Horsley and Richards, 1969
Horsley, J.A.; Richards, W.G.,
Les forces interatomiques a grandes distances dans les etats excites du radical OH,
J. Chim. Phys. Phys.-Chim. Biol., 1969, 66, 41. [all data]
Smith and Stella, 1975
Smith, Wm.H.; Stella, G.,
Lifetimes for OH and OD electronic states with resonance transitions in the region between 1700 and 1950 Å,
J. Chem. Phys., 1975, 63, 2395. [all data]
Remy, 1971
Remy, F.,
Time resolved spectroscopy of a pulsed discharge through water vapor: observation of emissions from the C2Σ+ state of OH,
Spectrosc. Lett., 1971, 4, 319. [all data]
Ray and Kelly, 1975
Ray, S.; Kelly, H.P.,
Oscillator strength for the D2Σ--X2Π transition in OH,
Astrophys. J., 1975, 202, 57. [all data]
Moore and Richards, 1971
Moore, E.A.; Richards, W.G.,
A reanalysis of the A2Σ+ - X2Πi system of OH,
Phys. Scr., 1971, 3, 223. [all data]
Elmergreen and Smith, 1972
Elmergreen, B.G.; Smith, W.H.,
Direct measurement of the lifetimes and predissociation probabilities for rotational levels of the OH and OD A2Σ+ states,
Astrophys. J., 1972, 178, 557. [all data]
Anderson and Sutherland, 1973
Anderson, R.A.; Sutherland, R.A.,
Erratum: Radiative and predissociative lifetimes of the A2Σ+ state of OH [Ref.: J. Chem. Phys., 1973, Vol. 58, 1226],
J. Chem. Phys., 1973, 59, 6690. [all data]
German, 1975
German, K.R.,
Direct measurement of the radiative lifetimes of the A2Σ+ (V' = 0) states of OH and OD,
J. Chem. Phys., 1975, 62, 2584. [all data]
Gaydon and Wolfhard, 1951
Gaydon, A.G.; Wolfhard, H.G.,
Predissociation in the spectrum of OH; the vibrational and rotational intensity distribution in flames,
Proc. R. Soc. London A, 1951, 208, 63. [all data]
Broida and Kane, 1953
Broida, H.P.; Kane, W.R.,
Rotational intensity distributions of OH and OD in an electrodeless discharge through water vapor,
Phys. Rev., 1953, 89, 1053. [all data]
Naegeli and Palmer, 1967
Naegeli, D.W.; Palmer, H.B.,
Predissociation in the chemiluminescent emission spectrum of OH,
J. Mol. Spectrosc., 1967, 23, 44. [all data]
Charton and Gaydon, 1958
Charton, M.; Gaydon, A.G.,
Excitation of spectra of OH in hydrogen flames and its relation to excess concentrations of free atoms,
Proc. R. Soc. London A, 1958, 245, 84. [all data]
Gutman, Lutz, et al., 1968
Gutman, D.; Lutz, R.W.; Jacobs, N.F.; Hardwidge, E.A.,
Shock-tube study of OH chemiluminescence in the hydrogen-oxygen reaction,
J. Chem. Phys., 1968, 48, 5689. [all data]
Palmer and Naegeli, 1968
Palmer, H.B.; Naegeli, D.W.,
Predissociation of chemiluminescent OH and OD,
J. Mol. Spectrosc., 1968, 28, 417-421. [all data]
Michels and Harris, 1969
Michels, H.H.; Harris, F.E.,
Predissociation effects in the A2Σ+ state of the OH radical,
Chem. Phys. Lett., 1969, 3, 441. [all data]
Gaydon and Kopp, 1971
Gaydon, A.G.; Kopp, I.,
Predissociation in the spectrum of OH; a reinterpretation,
J. Phys. B:, 1971, 4, 752. [all data]
Palmer and Naegeli, 1973
Palmer, H.B.; Naegeli, D.W.,
On the crossing of the 4Σ- and A2Σ+ states of OH,
J. Chem. Phys., 1973, 59, 994. [all data]
Smith, Elmergreen, et al., 1974
Smith, W.H.; Elmergreen, B.G.; Brooks, N.H.,
Interactions among the lower valence states of the OH radical,
J. Chem. Phys., 1974, 61, 2793. [all data]
Durmaz and Murrell, 1971
Durmaz, S.; Murrell, J.N.,
Predissociation by the continuum of a bound state without curve crossing. Application to the spectrum of OH,
Trans. Faraday Soc., 1971, 67, 3395. [all data]
Julienne, Krauss, et al., 1971
Julienne, P.S.; Krauss, M.; Donn, B.,
Formation of OH through inverse predissociation,
Astrophys. J., 1971, 170, 65. [all data]
Czarny and Felenbok, 1968
Czarny, J.; Felenbok, P.,
Etude a tres haute resolution de la transition B2Σ+ → A2Σ+ de OH et OD a l'aide d'une source haute frequence mise au point a cet effet,
Ann. Astrophys., 1968, 31, 141. [all data]
Scarl and Dalby, 1971
Scarl, E.A.; Dalby, F.W.,
High-field Stark effects on the near ultraviolet spectrum of the hydroxyl radical,
Can. J. Phys., 1971, 49, 2825. [all data]
Hogan and Davis, 1974
Hogan, P.; Davis, D.D.,
OH lifetime measurements of several K levels in the v' = 1 manifold of the A2Σ+ electronic state: excitation via A tunable UV laser,
Chem. Phys. Lett., 1974, 29, 555. [all data]
Becker and Haaks, 1973
Becker, K.H.; Haaks, D.,
Measurement of the natural lifetimes and quenching rate constants of OH(2Σ+, v = 0,1) and OD(2Σ+, v = 0,1) radicals,
Z. Naturforsch. A, 1973, 28, 249. [all data]
Becker, Haaks, et al., 1974
Becker, K.H.; Haaks, D.; Tatarczyk, T.,
The natural lifetime of OH (2Σ+, v=0, N=2, J=3/2) and its quenching by atomic hydrogen,
Chem. Phys. Lett., 1974, 25, 564. [all data]
Brophy, Silver, et al., 1974
Brophy, J.H.; Silver, J.A.; Kinsey, J.L.,
Direct measurement of the radiative lifetime of the A2Σ+(v' = 0, K' = 1, J' = 3/2) state of OH and OD,
Chem. Phys. Lett., 1974, 28, 418. [all data]
Bennett and Dalby, 1964
Bennett, R.G.; Dalby, F.W.,
Experimental determination of the oscillator strength of the violet system of OH,
J. Chem. Phys., 1964, 40, 1414. [all data]
de Zafra, Marshall, et al., 1971
de Zafra, R.L.; Marshall, A.; Metcalf, H.,
Measurement of lifetime and g factors by level crossing and optical double resonance in the OH and OD free radicals,
Phys. Rev. A: Gen. Phys., 1971, 3, 1557. [all data]
German, Bergeman, et al., 1973
German, K.R.; Bergeman, T.H.; Weinstock, E.M.; Zare, R.N.,
Zero-field level crossing and optical radio-frequency double resonance studies of the A2Σ+ states of OH and OD,
J. Chem. Phys., 1973, 58, 4304. [all data]
Rouse and Engleman, 1973
Rouse, P.E.; Engleman, R., Jr.,
Oscillator strengths from line absorption in a high-temperature furnace. I. The (0,0) and (1,0) bands of the A2Σ+-X2Πi transition in OH and OD,
J. Quant. Spectrosc. Radiat. Transfer, 1973, 13, 1503. [all data]
Golden, Del Greco, et al., 1963
Golden, D.M.; Del Greco, F.P.; Kaufman, F.,
Experimental oscillator strength of OH, 2Σ+ → 2Π, by a chemical method,
J. Chem. Phys., 1963, 39, 3034. [all data]
Anketell and Pery-Thorne, 1967
Anketell, J.; Pery-Thorne, A.,
Oscillator strengths in the 2Σ+-2Π band system of OH by the hook method,
Proc. R. Soc. London A, 1967, 301, 343. [all data]
Krishnamachari and Broida, 1961
Krishnamachari, S.L.N.G.; Broida, H.P.,
Effect of molecular oxygen on the emission spectra of atomic oxygen-acetylene flames,
J. Chem. Phys., 1961, 34, 1709. [all data]
Bonhoeffer and Reichardt, 1928
Bonhoeffer, K.F.; Reichardt, H.,
Zerfall von erhitztem wasserdampf in wasserstoff und freies hydroxyl,
Z. Phys. Chem. Abt. A, 1928, 139, 75. [all data]
Oldenberg, 1935
Oldenberg, O.,
The lifetime of free hydroxyl,
J. Chem. Phys., 1935, 3, 266. [all data]
Gaydon, Spokes, et al., 1960
Gaydon, A.G.; Spokes, G.N.; Suchtelen, J.V.,
Absorption spectra of low-pressure flames,
Proc. R. Soc. London A, 1960, 256, 323. [all data]
Basco and Norrish, 1961
Basco, N.; Norrish, R.G.W.,
The production of vibrationally excited hydroxyl radicals under isothermal conditions by flash photolysis,
Proc. R. Soc. London A, 1961, 260, 293. [all data]
Black and Porter, 1962
Black, G.; Porter, G.,
Vacuum ultra-violet flash photolysis of water vapour,
Proc. R. Soc. London A, 1962, 266, 185. [all data]
Horne and Norrish, 1967
Horne, D.G.; Norrish, R.G.W.,
Rate of H-abstraction by OH from hydrocarbons,
Nature (London), 1967, 215, 1373. [all data]
Moore and Broida, 1959
Moore, C.E.; Broida, H.P.,
OH in the solar spectrum,
J. Res. Nat. Bur. Stand. Sect. A, 1959, 63, 279. [all data]
Tinti, 1968
Tinti, D.S.,
Absorption and emission spectra of OH and OD in solid Ne. Evidence for rotation,
J. Chem. Phys., 1968, 48, 1459. [all data]
Bass and Broida, 1953
Bass, A.M.; Broida, H.P.,
A spectrophotometric atlas of the 2Σ+-2Π transition of OH, National Bureau of Standards Circular 541, Washington, D.C., 1953, 1. [all data]
Engleman, 1972
Engleman, R., Jr.,
Accurate wavenumbers of the A2Σ → X2Π (0, 0) and (1, 0) bands of OH and OD,
J. Quant. Spectrosc. Radiat. Transfer, 1972, 12, 1347. [all data]
Nanes and Robinson, 1971
Nanes, R.; Robinson, D.W.,
Magnetic rotation spectra of the A2Σ+-X2Πi transition of OH and OD,
J. Chem. Phys., 1971, 55, 963. [all data]
Nicholls, 1956
Nicholls, R.W.,
The interpretation of intensity distributions in the CN violet, C2 Swan, OH violet and O2 Schumann-Runge band systems by use of their r-Centroids and Franck-Condon factors,
Proc. Phys. Soc. London Sect. A, 1956, 69, 741. [all data]
Nicholls, Fraser, et al., 1959
Nicholls, R.W.; Fraser, P.A.; Jarmain, W.R.,
Transition probability parameters of molecular spectra arising from combustion processes,
Combust. Flame, 1959, 3, 13. [all data]
Crosley and Lengel, 1975
Crosley, D.R.; Lengel, R.K.,
Relative transition probabilities and the electronic transition moment in the A-X system of OH,
J. Quant. Spectrosc. Radiat. Transfer, 1975, 15, 579. [all data]
Learner, 1962
Learner, R.C.M.,
The influence of vibration-rotation interaction on intensities in the electronic spectra of diatomic molecules. I. The hydroxyl radical,
Proc. R. Soc. London A, 1962, 269, 311. [all data]
Meinel, 1967
Meinel, H.,
Spektroskopischer Nachweis zweier OH-Gruppen bei nichtthermischer Anregugn,
Z. Naturforsch. A, 1967, 22, 977. [all data]
Anketell and Learner, 1967
Anketell, J.; Learner, R.C.M.,
Vibration rotation interaction in OH and the transition moment,
Proc. R. Soc. London A, 1967, 301, 355. [all data]
Veseth, 1971
Veseth, L.,
Corrections to the spin-orbit splitting in 2Π states of diatomic molecules,
J. Mol. Spectrosc., 1971, 38, 228. [all data]
Meinel, 1950
Meinel, A.B.,
OH emission bands in the spectrum of the night sky. I.,
Astrophys. J., 1950, 111, 555. [all data]
Jones, 1955
Jones, A.V.,
Infra-red spectrum of the night sky near 10000 A,
Nature (London), 1955, 175, 950. [all data]
Connes and Gush, 1959
Connes, M.J.; Gush, H.P.,
Spectroscopie du ciel nocturne dans l'infrarouge par transformation de fourier,
J. Phys. Radium, 1959, 20, 915. [all data]
Kraus, 1957
Kraus, F.,
Uber die Anregungsbedingungen und die Intensitatsverhaltnisse der Infraroten OH-Banden,
Z. Naturforsch. A, 1957, 12, 479. [all data]
Murphy, 1971
Murphy, R.E.,
Infrared emission of OH in the fundamental and first overtone bands,
J. Chem. Phys., 1971, 54, 4852. [all data]
Acquista, Schoen, et al., 1968
Acquista, N.; Schoen, L.J.; Lide, D.R., Jr.,
Infrared spectrum of the matrix-isolated OH radical,
J. Chem. Phys., 1968, 48, 1534. [all data]
Roux, d'Incan, et al., 1973
Roux, F.; d'Incan, J.; Cerny, D.,
Experimental oscillator strengths in the infrared vibration-rotation spectrum of the hydroxyl radical,
Astrophys. J., 1973, 186, 1141. [all data]
Potter, Coltharp, et al., 1971
Potter, A.E., Jr.; Coltharp, R.N.; Worley, S.D.,
Mean radiative lifetime of vibrationally excited (v=9) hydroxyl. Rate of the reaction of vibrationally excited hydroxyl (v=9) with ozone,
J. Chem. Phys., 1971, 54, 992. [all data]
Ferguson and Parkinson, 1963
Ferguson, A.F.; Parkinson, D.,
The hydroxyl bands in the nightglow,
Planet. Space Sci., 1963, 11, 149. [all data]
d'Incan, Effantin, et al., 1971
d'Incan, J.; Effantin, C.; Roux, F.,
Intensites absolues et forces d'oscillateur de quelques raies des bandes de vibration-rotation 1-0 et 2-1 du radical OH,
J. Quant. Spectrosc. Radiat. Transfer, 1971, 11, 1215. [all data]
Mies, 1974
Mies, F.H.,
Calculated vibrational transition probabilities of OH(X2Π),
J. Mol. Spectrosc., 1974, 53, 150. [all data]
Heaps and Herzberg, 1952
Heaps, H.S.; Herzberg, G.,
Intensity distribution in the rotation-vibration spectrum of the OH molecule,
Z. Phys., 1952, 133, 48. [all data]
Cashion, 1963
Cashion, K.,
A method for calculating vibrational transition probabilities,
J. Mol. Spectrosc., 1963, 10, 182. [all data]
Ehrenstein, Townes, et al., 1959
Ehrenstein, G.; Townes, C.H.; Stevenson, M.J.,
Ground state Λ-doubling transitions of OH radical,
Phys. Rev. Lett., 1959, 3, 40. [all data]
Radford, 1964
Radford, H.E.,
18-cm Spectrum of OH,
Phys. Rev. Lett., 1964, 13, 534. [all data]
ter Meulen and Dymanus, 1972
ter Meulen, J.J.; Dymanus, A.,
Beam-maser measurements of the ground-state transition frequencies of OH,
Astrophys. J., 1972, 172, 21. [all data]
Turner, 1966
Turner, B.E.,
Einstein A coefficient for the λ doublet transitions of the ground state of OH,
Nature (London), 1966, 212, 184-185. [all data]
Valtz and Soglasnova, 1973
Valtz, I.E.; Soglasnova, V.A.,
Lambda-doubling of the O17H molecule at microwave frequencies,
Astrophys. Lett., 1973, 13, 23. [all data]
Powell and Lide, 1965
Powell, F.X.; Lide, D.R., Jr.,
Improved measurement of the electric-dipole moment of the hydroxyl radical,
J. Chem. Phys., 1965, 42, 4201. [all data]
Meerts and Dymanus, 1973
Meerts, W.L.; Dymanus, A.,
Electric dipole moments of OH and OD by molecular beam electric resonance,
Chem. Phys. Lett., 1973, 23, 45. [all data]
Barrett, 1967
Barrett, A.H.,
Radio observations of interstellar hydroxyl radicals,
Science, 1967, 157, 881. [all data]
Robinson and McGee, 1967
Robinson, B.J.; McGee, R.X.,
OH molecules in the interstellar medium,
Annu. Rev. Astron. Astrophys., 1967, 5, 183. [all data]
Cook, 1969
Cook, A.H.,
The hydroxyl molecule in interstellar space,
Physica (Amsterdam), 1969, 41, 1. [all data]
ter Meulen, Meerts, et al., 1976
ter Meulen, J.J.; Meerts, W.L.; van Mierlo, G.W.M.; Dymanus, A.,
Observations of population inversion between the Λ-doublet states of OH,
Phys. Rev. Lett., 1976, 36, 1031. [all data]
Carrington and Lucas, 1970
Carrington, A.; Lucas, J.D.,
Electron resonance of gaseous diatomic hydrides. I. 17O hyperfine and quadrupole interactions in OH and OD,
Proc. R. Soc. London A, 1970, 314, 567. [all data]
Arnold, Whiting, et al., 1976
Arnold, J.O.; Whiting, E.E.; Sharbaugh, L.F.,
A nearly exact MCSCF + Cl calculation of the dissociation energy of OH,
J. Chem. Phys., 1976, 64, 3251. [all data]
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References
| EA | Electron affinity |
| IE (evaluated) | Recommended ionization energy |
| ΔrG° | Free energy of reaction at standard conditions |
| ΔrH° | Enthalpy of reaction at standard conditions |
Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.
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Standard Reference Data Program |
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You can read more about the start of my new Curation League.
34 accounts wanted to participate, thanks and welcome to my Curation League. There are six new participants from last week. Thank you all for participating!
The curation of the last seven days ending by 02.09.2018 7:00:00 UTC are included in this analysis.
To enter the contest, please write a comment with add me
. A comment with remove me
will exclude an account from the contest. I will automatically scan the comments for building a participation list.
Winner for week 8
Gratulations to
- mys for winning this round! 8.28 is a really great score!
- pomocnik for the second place!
- arabson1990 for the third place!
All three did a great job in selecting undervalued posts for curation!
Result table
eff_sp
is the median effective Steem power of the account over last weeksum_weight
is the sum of all given votes. As a 100% votes can be given every 2.4 hours, this number should be close to 7000 (24 * 7 / 2.4 * 100
).median weight
is the median vote weight over the last weekreward
is the collected curation rewards within a week divided by effective Steem Power and multiplied by 1000adj. rew.
isreward
whensum_weight
is smaller than 7000 andreward / sum_weight * 7000
otherwise. This assures that voting more than the optimum will not lead to a better ranking.
| # | account | eff_sp | sum weight | median weight | reward | adj. rew. |
|---|---|---|---|---|---|---|
| 1. | mys | 2953.6 | 6134 | 0.50 | 8.28 | 8.28 |
| 2. | pomocnik | 16.1 | 8000 | 100.00 | 8.85 | 7.75 |
| 3. | arabson1990 | 155.1 | 7100 | 100.00 | 5.13 | 5.06 |
| 4. | reazuliqbal | 730.6 | 7175 | 100.00 | 3.82 | 3.73 |
| 5. | jacekw | 611.0 | 8204 | 30.00 | 3.76 | 3.20 |
| 6. | amosbastian | 1731.1 | 5130 | 16.25 | 3.19 | 3.19 |
| 7. | sourovafrin | 976.5 | 6591 | 100.00 | 2.85 | 2.85 |
| 8. | grzyb77 | 223.8 | 6530 | 55.00 | 2.15 | 2.15 |
| 9. | diosbot | 2427.7 | 8507 | 44.00 | 2.27 | 1.86 |
| 10. | jlordc | 211.1 | 6600 | 100.00 | 1.43 | 1.43 |
| 11. | doughtaker | 765.4 | 6711 | 50.00 | 1.41 | 1.41 |
| 12. | rose98734 | 28.9 | 2200 | 100.00 | 1.38 | 1.38 |
| 13. | abh12345 | 15601.5 | 7570 | 5.00 | 1.44 | 1.33 |
| 14. | crypto-econom1st | 266.5 | 3900 | 100.00 | 1.27 | 1.27 |
| 15. | cryptoyzzy | 357.6 | 6290 | 100.00 | 1.14 | 1.14 |
| 16. | cryptoandcoffee | 625.5 | 7910 | 50.00 | 1.19 | 1.05 |
| 17. | holger80 | 6963.1 | 6860 | 25.00 | 1.03 | 1.03 |
| 18. | yasu24 | 2117.0 | 6513 | 15.00 | 1.02 | 1.02 |
| 19. | mariusclaassen | 15.0 | 100 | 100.00 | 1.00 | 1.00 |
| 20. | annaburska | 1229.2 | 6603 | 50.00 | 0.93 | 0.93 |
| 21. | codingdefined | 1977.5 | 6599 | 100.00 | 0.78 | 0.78 |
| 22. | yailinbel | 32.5 | 1100 | 100.00 | 0.76 | 0.76 |
| 23. | isnochys | 1282.2 | 4529 | 10.00 | 0.75 | 0.75 |
| 24. | marvinix | 15.0 | 600 | 100.00 | 0.73 | 0.73 |
| 25. | lelon | 136.5 | 3500 | 100.00 | 0.72 | 0.72 |
| 26. | emrebeyler | 6699.2 | 7708 | 100.00 | 0.72 | 0.66 |
| 27. | blanchy | 563.6 | 5574 | 100.00 | 0.51 | 0.51 |
| 28. | ajayyy | 191.0 | 2300 | 100.00 | 0.49 | 0.49 |
| 29. | synergysteem | 153.1 | 800 | 100.00 | 0.29 | 0.29 |
| 30. | dexterdev | 198.5 | 2865 | 70.00 | 0.27 | 0.27 |
| 31. | coretan.aksara | 22.9 | 200 | 100.00 | 0.21 | 0.21 |
| 32. | hispeedimagins | 188.3 | 1896 | 100.00 | 0.18 | 0.18 |
| 33. | isarmoewe | 762.4 | 1500 | 50.00 | 0.16 | 0.16 |
| 34. | katamori | 15.6 | 100 | 100.00 | 0.06 | 0.06 |
Top 10 curation
This table shows the best ten curation rewards. The reward are calculated by post curation reward divided by effective Steem Power and multiplied by 1000 divided by vote weight and multiplied by 100. Thus, the reward is normalized to a vote of 100%. Comments were skipped.
This section is dominated this week by mys. Nice work! Keep in mind that the reward is normalized to a 100% vote.
| reward | voter | delay | author | title |
|---|---|---|---|---|
| 0.999 | mariusclaassen | 40.8 | superheroes | All heroes dont wear cape |
| 0.682 | pomocnik | 128.9 | igsgheiughe | Comme meat me steemian at Steemfest 3!!! |
| 0.478 | mys | 45.5 | thisorthese | Game |
| 0.414 | reazuliqbal | 33.5 | quasarframework | The Quasar Framework joins forces with Utopian.io and the Steem Community |
| 0.400 | yasu24 | 8.1 | kiyosui | ラーメン二郎一之江店 |
| 0.341 | mys | 4273.4 | dolphinscute | Bia Hai Xom |
| 0.340 | yasu24 | 333.5 | suminohou | マンゴーかき氷 |
| 0.325 | mys | 1216.2 | lucillefranke | white reindeer |
| 0.310 | pomocnik | 11.4 | trampmad | Anatolia Zachodnia |
| 0.271 | mys | 24.0 | selfvotejustice | @tipU is wasting its investors’ voting power to man-slaughter others. |
| 0.270 | mys | 5487.6 | bichdao | Chen by Namchen restaurant - My weekly choice . |
Top 25 Authors
This table shows the post authors which leaded to the highest post curation reward divided by effective Steem Power and multiplied by 1000. All rewards from all participating accounts were summed up. Comments were skipped.
| reward | vote count | author | avatar |
|---|---|---|---|
| 1.001 | 2 | superheroes | |
| 0.846 | 4 | quasarframework | |
| 0.796 | 11 | kuchniawedwoje | |
| 0.723 | 7 | coinbrew | |
| 0.690 | 32 | krasnalek | |
| 0.682 | 1 | igsgheiughe | |
| 0.680 | 34 | hallmann | |
| 0.662 | 7 | duddnr33 | |
| 0.532 | 21 | burnpost | |
| 0.489 | 21 | sndbox | |
| 0.472 | 7 | trampmad | |
| 0.431 | 6 | love-peace | |
| 0.424 | 25 | zwora | |
| 0.373 | 7 | programarivm | |
| 0.360 | 5 | ireenchew | |
| 0.353 | 10 | nieidealna.mama | |
| 0.349 | 7 | ilona3 | |
| 0.349 | 9 | dinver | |
| 0.345 | 5 | mrcn-86 | |
| 0.343 | 6 | mdsamad | |
| 0.340 | 5 | photographxx | |
| 0.340 | 5 | neiwem | |
| 0.338 | 8 | josephace135 | |
| 0.337 | 14 | matima | |
| 0.337 | 4 | svirus |
Top 3 curation
This table shows the top 3 curation posts of each participating account with at least a collected curation reward higher than 0.5.
The reward is calculated by post curation reward divided by effective Steem Power and multiplied by 1000 divided by vote weight and multiplied by 100. Thus, the reward is normalized to a vote of 100%. Only posts are shown.
mys
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.478 | 45.5 | thisorthese | Game |
| 0.341 | 4273.4 | dolphinscute | Bia Hai Xom |
| 0.325 | 1216.2 | lucillefranke | white reindeer |
pomocnik
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.682 | 128.9 | igsgheiughe | Comme meat me steemian at Steemfest 3!!! |
| 0.310 | 11.4 | trampmad | Anatolia Zachodnia |
| 0.248 | 23.9 | robertartfoto | Włocławek moje miasto z mojej perspektywy . |
arabson1990
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.167 | 14.8 | austenballard | Beat Demo - Pastel Sonic Beat 006 [Original Music] |
| 0.161 | 24.3 | august84 | Tajlandia i jej dawna stolica! Ayutthaya!!! [PL] |
| 0.155 | 14.9 | smashedturtle | LIFESTYLE: Bałtyk- Bieszady Tour 2018 |
reazuliqbal
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.414 | 33.5 | quasarframework | The Quasar Framework joins forces with Utopian.io and the Steem Community |
| 0.180 | 389.5 | genievot | Steem-js and Materialize Css Join Forces, Tutorial to get created posts #1 |
| 0.126 | 16.1 | buckydurddle | Utopian Open Source Radio - Episode 11 - Full Show Recording |
jacekw
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.305 | 16.8 | quasarframework | The Quasar Framework joins forces with Utopian.io and the Steem Community |
| 0.175 | 30.3 | mrcn-86 | [Przepis] Styropian - ciasto szybkie, smaczne i łatwe w przygotowaniu!!! |
| 0.169 | 1060.8 | bfx | Bitfinex Block Producer Disclosure |
amosbastian
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.304 | 35.1 | quasarframework | The Quasar Framework joins forces with Utopian.io and the Steem Community |
| 0.118 | 2631.7 | harry-heightz | Creating a Privacy Policy for Phone Saver Android Software. |
| 0.113 | 3566.4 | harry-heightz | FAQs document created for Jockey Android Software. |
sourovafrin
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.225 | 30.2 | svirus | Flower photography - First mobile photography post |
| 0.173 | 28.1 | coinbrew | BTC: A small bounce? |
| 0.169 | 28.1 | coinbrew | BTC: Final call before the next movement |
grzyb77
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.187 | 24.1 | maxofp2p | [PL/ENG] MAXOFP2P LIVESTREAM |
| 0.113 | 24.1 | ptaku | Dębki #1 |
| 0.106 | 24.1 | ptaku | My Actifit Report Card: sierpnia 20 2018 |
diosbot
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.113 | 27.0 | trampmad | Anatolia Zachodnia |
| 0.108 | 26.2 | customuser | Najpiękniejsze zdjęcia Jowisza i najważniejsze odkrycia dzięki pracy sondy Juno |
| 0.079 | 26.6 | verticallife | Jak prawidłowo się rozgrzewać oraz czy rozgrzewka może nam zaszkodzić |
jlordc
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.248 | 29.1 | legendchew | STEEM Food Tours #25: Euphoria Kitchen - PG, MY |
| 0.141 | 53.4 | musing | Musing.io Reintroduction |
| 0.112 | 30.2 | adelair | Live Stream : Trial by Comics Art Contest Entry |
doughtaker
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.212 | 29.4 | ajayyy | UI Elements and Building Improvements Voster Coaster VR Roller Coaster Building and Tycoon Game Development Update |
| 0.154 | 495.9 | programarivm | PHP Command to Check the Syntax of a Chess PGN File |
| 0.112 | 132.3 | gabox | My anger, rage and frustration in video games |
rose98734
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.138 | 30.1 | alyssas | Ancient Egyptian style still survives in modern Africa |
| 0.104 | 1178.2 | marena5 | Técnica de pintura sobre porcelana |
| 0.104 | 198.1 | khandve | Turtles captured on my phone Redmi 4 |
abh12345
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.130 | 17.1 | mountainjewel | DIY Pocket Pond: Catching Water on the Homestead |
| 0.123 | 14.2 | fyrstikken | Devil on my back! OnklP/Damien/Fyrstikken |
| 0.078 | 19.9 | hitmeasap | [Fortnite HUNGRY Challenge] EU Duos. SWE/ENG. |
crypto-econom1st
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.122 | 28.1 | mdsamad | Md abdus samad photography photo |
| 0.095 | 25.7 | vikashvgm | Ye sahi hai ����????? |
| 0.093 | 28.1 | mdsamad | Eid festival picture me and my brather |
cryptoyzzy
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.114 | 12.8 | therealwolf | Don’t waste your hard earned STEEM & SBD |
| 0.061 | 24.1 | curart38 | La Muse Hic by Piet Rodriguez |
| 0.057 | 27.2 | cryptogainsfr | Airdrops update #34 |
cryptoandcoffee
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.064 | 10.1 | meno | Just a little bit longer - Vlog |
| 0.062 | 13.0 | mistakili | Pact With The Grave |
| 0.062 | 17.6 | mistakili | Self Motivation |
holger80
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.077 | 15.2 | steemstem | Introducing Members of the Meetup! |
| 0.069 | 17.2 | guyfawkes4-20 | NeuroNation - Turn your brain into a beast! |
| 0.066 | 18.4 | curie | Curie Author Showcase (August 19, 2018) |
yasu24
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.400 | 8.1 | kiyosui | ラーメン二郎一之江店 |
| 0.340 | 333.5 | suminohou | マンゴーかき氷 |
| 0.227 | 333.5 | aitommylr | コンテスト#11:好きな動物「ペガサス（ユニコーン・一角獣）」 |
mariusclaassen
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.999 | 40.8 | superheroes | All heroes dont wear cape |
annaburska
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.059 | 65.5 | jacekw.dev | Machine learning and Steem #4: Account classification - comparison of available classifiers + 3D visualization of features |
| 0.050 | 42.2 | mykitchenlab | Fuksjowy Las - Sezon Smoothie Bowls Czas Start !! |
| 0.038 | 176.4 | kuchniawedwoje | Sok ze śliwek - przepis krok po kroku |
codingdefined
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.154 | 1629.3 | flodner | CASPIAN’S TOKEN CHALLENGE - Airdrop Is Going On! |
| 0.027 | 1412.7 | profit-shooter | � WHAT TO DO AT THE WEEKEND? - WATCH “BILLIONS” (2016) |
| 0.025 | 1101.2 | nurulafsar03 | Pictures from Spain. |
yailinbel
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.211 | 18.4 | eltrompetista | Lección de Trompeta (Escala Do Mayor y Figuras musicales) |
| 0.092 | 6.9 | tashidelek | Holanda |
| 0.092 | 69.8 | pavelnunez | Exposición fotográfica / Compartir lo que te gusta |
isnochys
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.062 | 366.1 | zaxan | 7 Sins Sloth |
| 0.047 | 417.6 | vimukthi | World’s Third Largest ICO is Giving Away $50 Million Worth Tokens |
| 0.039 | 38.4 | rivalzzz | FotoFreitag - Steem.Camp Special |
marvinix
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.267 | 339.4 | sirmiraculous | STEEMCHURCH: THE CHURCH. |
| 0.200 | 21.3 | joeparys | Join us at the Steem Creators Conference in Toronto! |
| 0.067 | 153.8 | owoblow-steemit | Start Something Today….The Conclusion Of The Whole Matter |
lelon
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.124 | 44.7 | maysi-art | The Pixie-Fairy Miniature Sculpture is done :-) |
| 0.081 | 247.8 | feoluwart | “Tranquility” |
| 0.059 | 141.9 | yoogyart | Flame Motion |
emrebeyler
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.052 | 24.6 | monajam | 200 Steem Sponsored Writing Contest - Vertex Market |
| 0.051 | 10.1 | datilla | KAZIYA DEVAM! |
| 0.045 | 10.2 | datilla | ÜZÜCÜ GAMİNG |
blanchy
| reward | delay [min] | author | title |
|---|---|---|---|
| 0.096 | 379.0 | petesays | Tuesday thinking |
| 0.039 | 317.4 | frogman18 | Political Correctness- Has It Gone Too Far? |
| 0.035 | 1680.7 | petesays | Moving, what a schlep |
If you want to participate, just drop a comment with add me
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Chirag Medhora
full-stack | engineering manager | user-empathetic | product-orientedExperience
today2014
Engineering Manager
Lead Engineer
Senior Engineer
Glassdoor
San Francisco, CA
- Leading a team of 6 in building the best job search experience. Responsible for overall architecture of the product, stability, performance and hiring, in addition to day-to-day feature development and bug fixing.
- Owner of business-critical functionality, like CPC revenue tracking and A/B testing.
- Built Glassdoor's self-service sales flow from the ground up.
20142013
Senior Software Engineer
Roblox
San Mateo, CA
- Built Roblox's highest trafficked and most monetizing page (roblox.com/games).
20132009
R&D Team Lead
Software Developer
Epic
Madison, WI
- Led a team of 5 in developing safety-critical clinical software for use in cardiology procedures.
20082007
Subject Matter Expert
Amdocs
Pune, India
- Migrated TBs of customer data from legacy systems to Amdocs. ETL windows for each customer were 24-hour high-pressure periods where all systems were offline and had to come up clean after the migration.
Selected Projects
2016
SEO boost for job search using non-searchable data
Glassdoor- Leveraged Glassdoor's strengths in UGC and jobs to add salaries, similar companies and similar job titles on the job search results to boost the page's SEO value.
- Stored this information per job in Redis to enable fast lookups without bloating up the Solr index.
- Created multithreaded batch jobs to seed the data in Redis, update it when the job changes and delete it when the job expires.
2013
Time-in-range tool for patients undergoing anticoagulation therapy
Epic- A key metric for patients undergoing anticoagulation therapy is the amount of time they spend within their target ranges. Prior to this project, Epic's EHR did not have a tool to calculate this metric, although it is reviewed during every clinical visit.
- Built a tool to extract clinical information from the hierarchical MUMPS database, feed it to a relational store, and run a tool for each patient with a configurable time range to calculate time-in-range and visually chart their progress.
Education
20092008
MS in eBusiness Technology
Carnegie Mellon University, School of Computer Science
Pittsburgh, PA
GPA 4.0. Member of the team that won the $10,000 final project competition.
20072003
BS in Computer Engineering
University of Mumbai
Mumbai, India
GPA 70%. Chairperson of the college's National Service Scheme.


Comments
-
Greg Hurrell
No changes to the Floater or Growl code have been made in Synergy recently.
If you're seeing multiple Growl notifications I suggest you check your Growl preferences in the Growl preference pane in the System Preferences. There you will see which applications are sending which notifications (possibly not even Synergy), and you'll also be able to turn off the ones that you don't want.
From the Synergy side of things, there are two "bezels" provided by Synergy. The Floater itself and the "Extra feedback" notification bezels that you see when you hit play/pause hot keys and the like. You can turn the latter on and off in the "General" tab of the Synergy preferences (the "Extra visual feedback for play, pause, next and previous track actions" checkbox).
-
bugzilla user 323
When Synergy runs as it is configured now, if I use the hot keys to toggle to the next track, I get three concurrent bezels appear. The first is the track info bezel I have set to the bottom-left of my screen. The second is the bezel in the center of my screen with the "next track" icon. The third (the problem bezel) contains the same information as the first (with the track information, and a large synergy logo). If I turn off "extra visual feedback for play, pause, next track and last track actions", the floater containing the those signs no longer pops up, but the problem bezel with the unwanted information still appears. If I re-enable the "extra visual feedback" button and disable the floater, the floater no longer appears in the bottom left corner of the screen (which is shouldn't, being disabled), and the "visual feedback" bezel reappears at the center of the screen. BUT so does the problem third bezel which contains the track information, so disabled either one of the options has no effect. If I disable both and then toggle to the next song, I still get this track information floater in the middle of the screen, but no visual feedback or the track info bezel in the bottom-left of the monitor (the track info bezel I want!). If I completely quit synergy, this annoying third bezel goes away, but then I lose the awesome functionality of the synergy.
I hope that something in this helps diagnose this problem. Thanks!
-
Greg Hurrell
That third problem bezel you're seeing is being provided via Growl so you'll have to turn it off in the Growl preferences.
Apple Menu -> System Preferences -> Growl
Under the "Applications" tab you'll see a list of applications and the notifications they provide. There you can turn them on and off; in this case you'll be wanting to turn off the Synergy one that you don't want to see.
-
Greg Hurrell
Changing assignment to reflect my new email address.
https://wincent.com/a/news/archives/2006/05/change_of_email.php
Add a comment
Comments are now closed for this issue.


{{define "content"}}
Put the downloaded file somewhere on your path: sudo mv ~/Downloads/sanic /usr/local/bin/
For a beginner friendly introduction, please check out the Timestamp-as-a-Service Example, as well as the sanic.io website's sanic project.
Finally, feel free to take a look at the more verbose quick-start tutorial and interactive demo if you haven't already.
We're always here to help. You can talk to a Sanic developer whenever you are stuck at contact@sanic.io


Feel free to add content and custom Front Matter to this file.
To modify the layout, see https://jekyllrb.com/docs/themes/#overriding-theme-defaults
layout: home


Don't just watch the videos, instead you should type and try to write the code or follow the instructions and do it practically.
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This is the high-level communications interface module.
More...
This is the high-level communications interface module.
CAPT_CommConfig.h This file configures the Captivate COMM stack.
- Version
- VERSION Released on RELEASE_DATE
These functions provide the interfaces between the application level, protocol layer, and the low-level serial interface.
- Version
- VERSION Released on RELEASE_DATE
§ __CAPT_NO_INTERFACE__
| #define __CAPT_NO_INTERFACE__ (0) |
def CAPT_NO_INTERFACE disables the communications module.
def CAPT_UART_INTERFACE sets the interface to UART. def CAPT_BULKI2C_INTERFACE sets the interface to I2C Bulk. def CAPT_REGISTERI2C_INTERFACE sets the interface to I2C Register.
§ __CAPT_UART_INTERFACE__
| #define __CAPT_UART_INTERFACE__ (1) |
§ __CAPT_BULKI2C_INTERFACE__
| #define __CAPT_BULKI2C_INTERFACE__ (2) |
§ __CAPT_REGISTERI2C_INTERFACE__
| #define __CAPT_REGISTERI2C_INTERFACE__ (3) |
§ CAPT_TRANSMIT_BUFFER_SIZE
| #define CAPT_TRANSMIT_BUFFER_SIZE (48) |
def CAPT_TRANSMIT_BUFFER_SIZE defines the size of the transmit buffer. Note that 2x this size will be allocated, since ping-pong buffering is used. This should be at least 2x the size of the largest packet, to allow for byte stuffing.
§ CAPT_QUEUE_BUFFER_SIZE
| #define CAPT_QUEUE_BUFFER_SIZE (256) |
def CAPT_QUEUE_BUFFER_SIZE defines the size of the receive queue buffer.
§ CAPT_I2C_RECEIVE_BUFFER_SIZE
| #define CAPT_I2C_RECEIVE_BUFFER_SIZE (32) |
def CAPT_REGISTER_I2C_BUFFER_SIZE defines the size of the I2C Rx buffer.
§ CAPT_I2C_REGISTER_RW_BUFFER_SIZE
| #define CAPT_I2C_REGISTER_RW_BUFFER_SIZE (32) |
def CAPT_I2C_REGISTER_RW_BUFFER_SIZE defines the size of the I2C register mode working buffer.
§ I2CSLAVE__REQ_POUT
| #define I2CSLAVE__REQ_POUT (P1OUT) |
§ I2CSLAVE__REQ_PDIR
| #define I2CSLAVE__REQ_PDIR (P1DIR) |
§ I2CSLAVE__REQ_MASK
| #define I2CSLAVE__REQ_MASK (BIT1) |
§ CAPT_initCommInterface()
Initialize TL communications as a whole. This API will start the low-level serial driver.
- Parameters
-
| pApp | is a pointer to the application to link to |
- Returns
- none
Referenced by CAPT_initUI().
§ CAPT_writeElementData()
| bool CAPT_writeElementData |
( |
uint8_t |
ui8SensorID | ) |
|
Transmit all element data for a given sensor.
- Parameters
-
| ui8SensorID | indicates which sensor's data to transmit. |
- Returns
- true if data transmitting, else false.
Referenced by CAPT_updateUI().
§ CAPT_writeSensorData()
| bool CAPT_writeSensorData |
( |
uint8_t |
ui8SensorID | ) |
|
Transmit all sensor-specific data for a given sensor.
- Parameters
-
| ui8SensorID | indicates which sensor's data to transmit. |
- Returns
- true if data transmitting, else false.
Referenced by CAPT_updateUI().
§ CAPT_writeGeneralPurposeData()
| bool CAPT_writeGeneralPurposeData |
( |
uint16_t * |
pData, |
|
|
uint8_t |
ui8Cnt |
|
) |
| |
Transmit generic, unsigned integer formatted data for logging or plotting.
- Parameters
-
| pData | is a pointer to the data to send. |
| ui8Cnt | is the number of entries pointed to by pData; the max is 29. |
- Returns
- true if data transmitting, else false.
§ CAPT_writeString()
| bool CAPT_writeString |
( |
const char * |
pSrcString | ) |
|
Transmit a C string.
- Parameters
-
| pSrcString | is a pointer to the first character of the string to send. The string must be null terminated. |
- Returns
- true if data transmitting, else false.
§ CAPT_writeTrackPadSensorData()
| bool CAPT_writeTrackPadSensorData |
( |
uint8_t |
ui8SensorID | ) |
|
Transmit TrackPad specific X,Y position and Gesture data.
- Parameters
-
| ui8SensorID | indicates which sensor's data to transmit. |
- Returns
- true if data transmitting, else false.
Referenced by CAPT_updateUI().
§ CAPT_writeTrackPadSensorStatus()
| bool CAPT_writeTrackPadSensorStatus |
( |
uint8_t |
ui8SensorID | ) |
|
Transmit TrackPad sensor status.
- Parameters
-
| ui8SensorID | indicates which sensor's data to transmit. |
- Returns
- true if data transmitting, else false.
Referenced by CAPT_updateUI().
§ CAPT_checkForInboundPacket()
| bool CAPT_checkForInboundPacket |
( |
void |
| ) |
|
Call into the protocol layer to determine if any parameter packets have been received. THis API should be called periodically in the background by the application layer.
- Parameters
- none
- Returns
- true if packet received, else false.
§ CAPT_checkForRecalibrationRequest()
| bool CAPT_checkForRecalibrationRequest |
( |
void |
| ) |
|
Check if a sensor re-calibration was requested by the host.
- Parameters
- none
- Returns
- true if re-cal required, else false


{% extends "layout.html" %} {% block title %}Midterm TA Evaluations » {{ invite.course }}{% endblock %} {% block content %} {% for error in errors %}
The evaluation period has expired.
{% else %} {% if invite.tas %} {% if sel_ta == '' %} {% endif %} {% else %} {% if remaining %}There are no more TAs to evaluate for this class, however, you still have these other evaluations to complete:
All of your evaluations are complete! Thank you for your feedback.
{% endif %} {% endif %} {% endif %} {% endblock %}


class: center, middle, inverse, title-slide # An Introduction to Rcpp ## Stat 696: Machine Learning ### Andrew Bates ### 02/14/2019 --- # What Is Rcpp?  -- You have some R code but... -- It's too slow -- You've tried vectorizing, etc. -- It's still too slow -- Some use cases (from [Advanced R](http://adv-r.had.co.nz/Rcpp.html)) - Loops that can't be vectorized (e.g. MCMC) - Need to call R functions millions of times (e.g. recursive functions) - Need complex data structures not available in R --- # A First Example Write some C++ code -- ```cpp #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] NumericVector square_root(NumericVector x) { return sqrt(x); } ``` -- Then call it from R -- ```r x <- 1:5 square_root(x) ``` ``` ## [1] 1.000000 1.414214 1.732051 2.000000 2.236068 ``` --- # Let's Break It Down ```cpp #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] NumericVector square_root(NumericVector x) { return sqrt(x); } ``` -- .pull-left[ - `#include <Rcpp.h>` - `using namespace Rcpp;` - `// [[Rcpp::export]]` - `NumericVector square_root(...` ] .pull-right[ - like `library(mypackage)` - so we don't have to write `package::function` - send function to R - function definition ] ??? things to note: 1. semicolons 2. need to specify types --- # A More Realistic Example Draw sample from multivariate normal ```cpp #include <RcppEigen.h> // [[Rcpp::depends(RcppEigen)]] using namespace Rcpp; using namespace Eigen; // [[Rcpp::export]] VectorXd mv_normal(VectorXd mu, MatrixXd sigma){ int r = mu.size(); VectorXd standard_normal(r); VectorXd result(r); standard_normal = as<VectorXd>(rnorm(r, 0, 1)); result = mu + sigma.llt().matrixL() * standard_normal; return result; } ``` ??? things to note: 1. using RcppEigen - wrapper for Eigen C++ library for linear algebra 2. `rnorm` is part of Rcpp sugar - C++ functions that will be familiar to R users 3. using Cholesky decomposition --- # A More Realistic Example In R: ```r mu <- c(4,4) sigma <- diag(2) * 2 mv_normal(mu, sigma) ``` ``` ## [1] 4.712285 2.367431 ``` --- class: middle Let's see this in action! --- # Resources [Rcpp.org](http://www.rcpp.org) [Rcpp Gallery](http://gallery.rcpp.org) - *lots* of examples Rcpp chapter of [Advanced R](http://adv-r.had.co.nz/Rcpp.html) Compiled Code chapter of [R Packages](http://r-pkgs.had.co.nz/src.html) --- class: center, middle # Happy Rcpping! These slides were created with the R package [**xaringan**](https://github.com/yihui/xaringan). You can find them at [https://asbates.rbind.io/slides/rcpp-intro](https://asbates.rbind.io/slides/rcpp-intro) You can find code for the examples at [https://github.com/asbates/neural-nets/tree/master/rcpp-intro](https://github.com/asbates/neural-nets/tree/master/rcpp-intro)


Mushrooms - P. Cubensis
Note: I prepared for this mushroom trip by taking a nap earlier in the day and by limiting my food consumption to a few saltines, some toast and a glass of orange juice.
2:30 - Consume over 2 grams of p. cubensis mushrooms. The taste and smell is fairly appalling but a couple drinks of orange juice smooth the process. The orange juice also acts as a trip potentiator.
3:15 - Starting to feel first signs of mushroom high. My group and I get up and decide to walk over to the free art museum in the park. Colors are distinctly brighter than normal. We walk through a clearing surrounded by a flowering tree in full bloom. The feeling of peace and beauty is indescribable. On our way there we leave Z sitting in a field. He has consumed the largest quantity of mushrooms and is feeling both nauseous and extremely high.
3:30 - Inside the museum the photographs are radiating energy. Though normal photographs, they all seem to have been taken on an alien planet. In a picture of tall grass bordering a river, the water seems to be flowing. Deciding the museum is too intense and feeling a bit queasy, we head outside.
3:45 - Sitting down on a park bench outside the museum. I close my eyes and see an enthralling and fascinating world of morphing shapes and colors. Circles, ovals, and patterns are constantly appearing and changing shape. Though the show on the inside of my eyelids is enticing, my stomach feels mildly upset and the nausea is hindering my enjoyment of the trip. I try to tell myself that everything is OK, but the feeling persists. The upset stomach while coming up was the only real road bump during the entire trip.
At this point my memory of time is a bit skewed. Lying on the ground staring at the sky I began to see a number of patterns. At one point it seems as if the clouds are in multiple layers and the top one is shaking back and forth. Later, I see an alphabet soup of letters swirling around, spelling nothing. I also remember seeing the shapes of horse riders and people beginning to coalesce in the sky, but they never fully take shape.
During this time while laying on the ground a large group of kids from my school shows up. I presume it is probably E's doing. She has been on her cell phone (I left mine in the car) and probably invited them to the park. They act in a manner that seems boorish to me. One blurts out, 'Dog let's just get drunk!' However, I am completely unfazed by this sophomoric attitude and accept it. Though, I do realize it as a completely worthless way to approach one's life. Also during this time another friend of E's shows up on his bike. Standing there, his tire, inflated to 90 psi, bursts. The boom is deafening and quite a shock to all of us high on mushrooms.
The body high at this point has become euphoric, unlike anything I've ever experienced on marijuana. Wondering where my friend A is, and discontent with the current group of people, I set off to find him and take my trip down a more serious path. He has been wandering around the park, and somehow I locate him. Our ensuing trip around the park was the clear highlight of the trip and the part I enjoyed and learned most from.
He is the leader and he begins telling me about the people he has seen while walking earlier. The park we have chosen for our trip is full of bizarre, generally shady, and interesting characters. The people he points out, coupled with his way of describing them, is completely hilarious to me. A white guy rapping, walking around in a bush, listening to his headphones. A weird looking guy in a car just staring at us, presumably doing nothing else. A Mexican guy wearing a bright green shirt. As we walk around, he describes each person in a manner that I find incredibly hilarious. I feel like he is both leading me around the park and leading me into the world of mushrooms. It was partially his earlier glowing experiences that persuaded me to try the drug. He explains to me that mushrooms can be enjoyed on a goofy level, but they can also be something more serious. This is a theme that we expand upon as our journey continues.
Now, we have reached a different part of the park and I decide to act as leader. He follows me around the tennis courts and we watch the players hit a little green ball back and forth. By now I have stopped giggling and laughing and have come to realize the mushroom trip as something more than recreational. We see a bee dying, it is struggling and its death is a painful one. In the following few minutes everything comes together.
A explains to me the previous time he was on mushrooms, he was in his friend's basement standing between Person B and Person C. Person B is a cool guy, but his life is basically centered around going to parties, getting drunk, and selling drugs. Person C used to be like that, but he is now focused on playing music, skiing, sports, i.e. the other pleasures in life. A realized that he was in the middle, and had a choice of which path to pursue. Person C's life path was the clear choice.
As we continue to walk I understand that our journey has been both a literal and metaphorical one. A has shown me around the park and made me laugh. But he has also shown me what a good mushroom trip is about, and more importantly what a good life is about. The entire trip has been an illustration of the perks of each path. I saw the group of kids from our school, getting drunk and smoking weed. While they were probably having fun, ultimately their lives and choices are less satisfying. A has shown me a more grown-up, serious way of living, and at the time it is the one that I chose.
Later, we stumble upon the same clearing we were in earlier. Bees are buzzing around, pollinating the flowers. Gorgeous petals cover the ground. The visceral beauty of the entire sight is even more breathtaking than earlier (coincidentally I'm higher on mushrooms), and the overall beauty of the life process taking place before our eyes is equally amazing.
We go to the conservatory, which I had earlier understood to be closed. It is actually open and being inside is thrilling. The cacti are all strange to look, but interesting and cool. We go back to Z and E, intending to tell them to come to the conservatory with us. Reluctantly Z gets up, and E, excited to see the conservatory also comes along. The conservatory is full of thrilling tactile and sensory experiences, but nothing of such a serious nature as A and I had experienced earlier. We all find plants to name after each other and thoroughly enjoy looking at and touching each individual plant.
We spend a few more hours in the park, coming down pleasantly as the light of the day fades. A departs. I, along with Z and E, decide to smoke marijuana and get dinner in Chinatown. I found the cannabis high to lessen the feeling of peace and well-being the mushrooms left me with. Nevertheless, at certain points that night while high on cannabis I experienced the most comfortable and pleasant euphoria and body-high I have ever felt.
All in all, I learned that mushrooms, and life in general, can be enjoyed on two levels. There is the amusement park level. One may see pleasant and interesting visual hallucinations, laugh with his/her friends, and generally feel good. There is also the deeper, spiritual level. I can engage in philosophical conversations, meditate on my life, and have life-altering experiences. Though neither level is exclusive from the other (I experienced both during my trip) it is important to recognize the different ways in which this wonderful ethnogen may be used.
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


When I first started writing unit tests in my early career, I thought it’s boring task and tried to avoid them. I think unit tests should never be ignored and it’s better to start write them before it’s too late :) Once you get used to them and use the right tools it will be really enjoyable task.
One of the struggles to write unit tests is mocking functions; changing the behavior of external calls, dependencies, database connections, etc. So, I decided to write a blog series about unit testing and start with mocking functions.
Let’s start with a simple example: Write a script that interacts with AWS S3; it checks if there are dev buckets (check if any bucket starts with “dev-“)
files structure
├── main.py
├── tests
│ ├── __init__.py
│ └── test_utils.py
└── utils
└── s3_utils.py
main.py
from utils.s3_utils import list_s3_buckets
def check_dev_buckets() -> bool:
"""
Checks if the dev buckets exist
"""
buckets = list_s3_buckets()
for bucket in buckets:
if bucket.startswith('dev-'):
return True
return False
if __name__ == '__main__':
if check_dev_buckets():
print('Dev buckets exist')
else:
print('No dev buckets found')
s3_utils.py
from boto3 import client
S3_CLIENT = client('s3')
def list_s3_buckets():
"""
Lists all S3 buckets
"""
response = S3_CLIENT.list_buckets()
buckets = [bucket['Name'] for bucket in response['Buckets']]
return buckets
test_utils.py
import mock
from main import check_dev_buckets
def test_check_dev_buckets():
with mock.patch('main.list_s3_buckets') as mock_list_s3_buckets:
mock_list_s3_buckets.return_value = ['dev-bucket-1', 'dev-bucket-2']
assert check_dev_buckets()
⚠ Note
in mock.patch() you need to pass the function where it’s imported (used) not wehre it’s defined. it should be main.list_s3_buckets
and not utils.s3_utils.list_s3_buckets


Hannah: Hannah, here.
Samuel: Hi, Honey. It’s me.
Hannah: Sam! What’s up?
Samuel: I just needed to hear your voice. How are you doing?
Hannah: Delivering a truckload of fruit to Hamburg. *laughs*. Hamburg must really love bananas. The weather is beautiful down here. I wish you could see it.
Samuel: Someday I’ll come with you… When are you back?
Hannah: I’ll be in London next Friday. Then we can go out together.
Samuel: I’ll find a good restaurant. I can’t wait till you’re back.
Hannah: Me too. I really have to go.
Samuel: Right. Of, course. See you. *Kissing sound, I think*.
Hannah: See you soon.


?6
7.8
¡
The
New
York
copyright
reserved
botanical
garden
SAPO
NO:
5264
Bumelia
salicifolia
(L)
Sw.
LOCALITY:
Cruz
Bay
Quarter;
Susannaberg,
road
to
North
Shore.
HABITAT:
Roadside.
DESCRIPTION:
Tree,
8
m
tall.
Twigs
ascending
with
congested
leaves
at
end.
Flower
buds
yellowish.
COLL:
P.
Acevedo-Rdgz.
DATE:
19
Feb
1993
BOTANICAL
<%>
NY>IMAGED
MC1AI
VHD1/
DATAMirAI
riAOnPM
Supported
by
funds
from
the
Smithsonian
Institution
and
the
Homeland
Foundation
SMITHSONIAN
INSTITUTION
From
THE
UNITED
STATES
NATIONAL
HERBARIUM
00843141
Legend -
Level of confidence that token is an accurately-transcribed word
extremely low
very low
low
undetermined
medium
high
very high


Back
Team Number:
Drive Train
Select Type of Drive Train
Swerve
Holonomic
H drive
6 Wheel Tank
8 Wheel Tank
Mecanum
Omni
Triangular
Octal
Other
Focus
Gear
Fuel
Defense
Can Climb
Yes
No
Where do they get fuel?
Human Player
Hopper
How can they score?
Gears:
Yes
No
Fuel:
High
Low
Both
Number of Gear Cycles:
Number of Fuel Scored Per Match:
Submit


Control your Hue lights from Status Board
Ever thought to yourself "dang, I wish I could control my light bulbs from Panic's Status Board app"? Good news! Panic Switch is a widget for Panic's Status Board app that controls your Philips Hue lights.
First we need to create the Panic Switch user on your Hue bridge. This is a one-time operation that will not need to be repeated unless you replace or factory reset your bridge.
POST
the following JSON to /api
:{"devicetype": "Panic Switch", "username": "panicswitch"}
link button not pressed
. Push the link button
on your bridge and submit the POST
again. You should see a success message.Next, set up Status Board. Add a Do-It-Yourself widget and set the Panel URL to http://bleything.github.io/panicswitch/widget.html
All done!
(The MIT License)
Copyright (c) 2013 Ben Bleything
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


You can see the tutorial
here. The "footer" option to use summary feature is deprecated since 2.5.0 version and this
option is replaced by the "summary" option.
The example code can be slower than your environment because the code is transpiled by babel-standalone in runtime.


The BodyPix model can estimate which pixels in an image are part of a person, and which pixels
are part of each of 24 body parts. It works for multiple people in an input image or video.
The internal resolution, output stride and model have
the
largest effects on accuracy/speed. A higher internal resolution results in higher accuracy but lower the
speed.
A higher output stride results in lower accuracy but higher speed. A larger model, indicated by
both
architecture and multiplier dropdown, results in higher accuracy but lower speed.


Click on Product list above to see a list of products. Click on a product name to product price and details


--- layout: post title: 'Reclaiming Twitter - Phil Leggetter' url: http://www.leggetter.co.uk/2013/01/13/reclaiming-twitter.html source: http://www.leggetter.co.uk/2013/01/13/reclaiming-twitter.html domain: www.leggetter.co.uk image: http://kinlane-productions.s3.amazonaws.com/ap-evangelist-site/curated/screenshots/9352_api500_com.png ---
For a long while now I’ve not been getting as much out of Twitter as I used to.There’s too much information to take in.I’ve long said that Twitter is throw-away.If you miss something then it doesn’t matter.If it’s important then I’ll see a retweet or pick up the information from somewhere else.


I enjoy writing software that makes the lives of others easier.
Check out some of the languages I enjoy writing code in:
Message me on Twitter!


28 May 2018 by Aditya Morolia
Let’s talk about Iron Man. We all love him. A genius, eccentric, billionaire engineer, with a desire to change the world. But if you think such a person is possible only in comic books, you probably haven’t heard of Elon Musk. This article is a br ... [Read more]
28 May 2018 by Atirek Kumar
A guy who is fed up with the college education system and has this really original and genius idea decides to dropout of college and implement that original and genius idea. Years later he has proved everyone wrong and is the Founder of some big c ... [Read more]
19 May 2018
E-Cell IIIT Hyderabad is partnering with Entrepreneur India for the 15th annual Entrepreneur Start-up Summit, 2018 scheduled on May 19-20 2018 at HITEX Exhibition Centre, Hyderabad
This 2 day event will be packed with perspective building in ... [Read more]
23 Sep 2017
Hosted jointly by E-Cell IIT-Hyderabad and E-Cell IIIT-Hyderabad, Megathon is a 24-hour hackathon for all aspiring student entrepreneurs in Hyderabad. Ideas can solve a real life problem, social issue or any other aspect from the given themes for ... [Read more]


Zang set off on a week-long terk. He took a big rucksack. In the rucksack was a sleeping bag, lots of food, a flask and a pot to cook in. Zang did not pack a tent and there was no need for water as the creeks were full. Plod, plod, plod he went, up the hills and along the hilltops. Zang went to bed at sunset. He slept in the open, snug in his sleeping bag. At six o"clock on the second morning, it began to rain. Soon Zang's sleeping bag was soaking wet, his rucksack was soaking wet and Zang was soaking wet. Do you think Zang went on or did he ring his mum and ask her to collect him" Zang was seventeen.
in-context


GPX4 gene has been recently identified to help cells cope with something called a oxidative stress. It has been identified through experiements that cells cannot survive without GPX4. We don't yet fully understand the impact of a partial loss of GPX4 function.


A Crazy place for crazy foody - Heart of Perfect Food Hangout! GOODBYE JUNK FOOD. HELLO SUPER HEALTHY MEALS..


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Monday
Tuesday
Wednesday
Thursday
Friday
Statistics
☰
Your Subjects
Calculus
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Introduction to Computer programming
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Let A be a general real m-by-n matrix. The singular value decomposition (SVD) of A is the factorization , where U and V are orthogonal, and , , with . If A is complex, then its SVD is where U and V are unitary, and is as before with real diagonal elements. The are called the singular values, the first r columns of V the right singular vectors and the first r columns of U the left singular vectors.
The routines described in this section, and listed in Table 2.12, are used to compute this decomposition. The computation proceeds in the following stages:
The reduction to bidiagonal form is performed by the subroutine xGEBRD, or by xGBBRD for a band matrix.
The routine xGEBRD represents U1 and V1 in factored form as products of elementary reflectors, as described in section 5.4. If A is real, the matrices U1 and V1 may be computed explicitly using routine xORGBR, or multiplied by other matrices without forming U1 and V1 using routine xORMBR. If A is complex, one instead uses xUNGBR and xUNMBR, respectively.
If A is banded and xGBBRD is used to reduce it to bidiagonal form, U1 and V1 are determined as products of Givens rotations , rather than as products of elementary reflectors. If U1 or V1 is required, it must be formed explicitly by xGBBRD. xGBBRD uses a vectorizable algorithm, similar to that used by xSBTRD (see Kaufman [77]). xGBBRD may be much faster than xGEBRD when the bandwidth is narrow.
The SVD of the bidiagonal matrix is computed either by subroutine xBDSQR or by subroutine xBDSDC. xBDSQR uses QR iteration when singular vectors are desired [32,23], and otherwise uses the dqds algorithm [51]. xBDSQR is more accurate than its counterparts in LINPACK and EISPACK: barring underflow and overflow, it computes all the singular values of B to nearly full relative precision, independent of their magnitudes. It also computes the singular vectors much more accurately. See section 4.9 and [32,23,51] for details.
xBDSDC uses a variation of Cuppen's divide and conquer algorithm to find singular values and singular vectors [69,58]. It is much faster than xBDSQR if singular vectors of large matrices are desired. When singular values only are desired, it uses the same dqds algorithm as xBDSQR [51]. Divide-and-conquer is not guaranteed to compute singular values to nearly full relative precision, but in practice xBDSDC is often at least as accurate as xBDSQR. xBDSDC represents the singular vector matrices U2 and V2 in a compressed format requiring only space instead of n2. U2 and V2 may subsequently be generated explicitly using routine xLASDQ, or multiplied by vectors without forming them explicitly using routine xLASD0.
If , it may be more efficient to first perform a QR factorization of A, using the routine xGEQRF , and then to compute the SVD of the n-by-n matrix R, since if A = QR and , then the SVD of A is given by . Similarly, if , it may be more efficient to first perform an LQ factorization of A, using xGELQF. These preliminary QR and LQ factorizations are performed by the drivers xGESVD and xGESDD.
The SVD may be used to find a minimum norm solution to a (possibly)
rank-deficient linear least squares
problem (2.1). The effective rank, k, of A can be determined as the
number of singular values which exceed a suitable threshold.
Let
be the leading k-by-k submatrix of ,
and
be the matrix consisting of the first k columns of V.
Then the solution is given by: