Science.gov

Sample records for log koc values

  1. Dissolved Concentrations of PAHs and PCBs Are Often Over-predicted Using Sediment Concentrations and Literature Koc Values

    EPA Science Inventory

    There is an increasing amount of chemical and biological evidence that using sediment concentrations and commonly applied Koc values frequently overpredicts interstitial water concentrations of HOCs, and thereby overestimates uptake and/or effects of those chemicals on exposed or...

  2. Special Values of Generalized Log-sine Integrals

    E-print Network

    Jonathan M. Borwein; Armin Straub

    2011-03-22

    We study generalized log-sine integrals at special values. At $\\pi$ and multiples thereof explicit evaluations are obtained in terms of Nielsen polylogarithms at $\\pm1$. For general arguments we present algorithmic evaluations involving Nielsen polylogarithms at related arguments. In particular, we consider log-sine integrals at $\\pi/3$ which evaluate in terms of polylogarithms at the sixth root of unity. An implementation of our results for the computer algebra systems Mathematica and SAGE is provided.

  3. Extended sorption partitioning models for pesticide leaching risk assessments: Can we improve upon the koc concept?

    PubMed

    Jarvis, Nicholas

    2016-01-01

    Models used to assess leaching of pesticides to groundwater still rely on the sorption koc value, even though its limitations have been known for several decades, especially for soils of low organic carbon content (i.e. subsoils). This is mainly because the general applicability of any improved model approach that is also simple enough to use for regulatory purposes has not been demonstrated. The objective of this study was to test and compare alternative models of sorption that could be useful in pesticide risk assessment and management. To this end, a database containing the results of batch sorption experiments for pesticides was compiled from published studies in the literature, which placed at least as much emphasis on measurements in subsoil horizons as in topsoil. The database includes 785 data entries from 34 different published studies and for 21 different active substances. Overall, the apparent koc value, koc(app), roughly doubled as the soil organic carbon content decreased by a factor of ten. Nevertheless, in nearly half of the individual datasets, a constant koc value proved to be an adequate model. Further analysis showed that significant increases in koc(app) in subsoil were found primarily for the more weakly adsorbing compounds (koc valueskoc concept currently used in leaching models should therefore be replaced by an alternative approach that gives a more realistic representation of pesticide sorption in subsoil. The two alternative models tested in this study appear to have widespread applicability and are also simple enough to parameterize for this purpose. PMID:26363724

  4. On the hydrophobicity of peptides: Comparing empirical predictions of peptide log P values.

    PubMed

    Thompson, Sarah J; Hattotuwagama, Channa K; Holliday, John D; Flower, Darren R

    2006-01-01

    Peptides are of great therapeutic potential as vaccines and drugs. Knowledge of physicochemical descriptors, including the partition coefficient logP, is useful for the development of predictive Quantitative Structure-Activity Relationships (QSARs). We have investigated the accuracy of available programs for the prediction of logP values for peptides with known experimental values obtained from the literature. Eight prediction programs were tested, of which seven programs were fragment-based methods: XLogP, LogKow, PLogP, ACDLogP, AlogP, Interactive Analysis's LogP and MlogP; and one program used a whole molecule approach: QikProp. The predictive accuracy of the programs was assessed using r(2) values, with ALogP being the most effective (r( 2) = 0.822) and MLogP the least (r(2) = 0.090). We also examined three distinct types of peptide structure: blocked, unblocked, and cyclic. For each study (all peptides, blocked, unblocked and cyclic peptides) the performance of programs rated from best to worse is as follows: all peptides - ALogP, QikProp, PLogP, XLogP, IALogP, LogKow, ACDLogP, and MlogP; blocked peptides - PLogP, XLogP, ACDLogP, IALogP, LogKow, QikProp, ALogP, and MLogP; unblocked peptides - QikProp, IALogP, ALogP, ACDLogP, MLogP, XLogP, LogKow and PLogP; cyclic peptides - LogKow, ALogP, XLogP, MLogP, QikProp, ACDLogP, IALogP. In summary, all programs gave better predictions for blocked peptides, while, in general, logP values for cyclic peptides were under-predicted and those of unblocked peptides were over-predicted. PMID:17597897

  5. Is log ratio a good value for measuring return in stock investments

    E-print Network

    Is log ratio a good value for measuring return in stock investments Alfred Ultsch Databionics the rate of return is an important issue for theory and practice of in- vestments in the stock market on daily return rates of a large set of actual stocks. It is shown that returns can be modeled with a very

  6. Deriving Criteria-supporting Benchmark Values from Empirical Response Relationships: Comparison of Statistical Techniques and Effect of Log-transforming the Nutrient Variable

    EPA Science Inventory

    In analyses supporting the development of numeric nutrient criteria, multiple statistical techniques can be used to extract critical values from stressor response relationships. However there is little guidance for choosing among techniques, and the extent to which log-transfor...

  7. Properties and expression of a multidrug efflux pump AcrAB-KocC from Klebsiella pneumoniae.

    PubMed

    Li, Dai-Wei; Onishi, Motoyasu; Kishino, Takanori; Matsuo, Taira; Ogawa, Wakano; Kuroda, Teruo; Tsuchiya, Tomofusa

    2008-04-01

    We previously reported that we had cloned genes responsible for multidrug resistance from the chromosomal DNA of Klebsiella pneumoniae MGH78578 using a drug-hypersusceptible Escherichia coli strain as a host. One of the recombinant plasmids pETV6 conferred resistance to host cells against a wide range of antimicrobial agents, dyes and detergents. It was revealed that this plasmid carried the acrBKp gene and a part of the acrAKp gene coding for a multidrug efflux pump belonging to the RND family. We cloned the whole acrAKpBKp operon of K. pneumoniae and characterized the pump. The AcrAB pump utilized TolC as an outer membrane component in cells of E. coli. Elevated energy-dependent efflux of ethidium was observed with cells possessing AcrAKp BKp-TolC. We cloned a gene coding for an ortholog of TolC from chromosomal DNA of K. pneumoniae, and designated it kocC. It seems that the AcrAKpBKp-KocC complex functions as a potent multidrug efflux pump in K. pneumoniae. We observed a higher level of expression of acrAKp in K. pneumoniae MGH78578, a multidrug resistant strain, compared with ATCC10031, a drug susceptible strain. PMID:18379044

  8. Modelling pathogen log10 reduction values achieved by activated sludge treatment using naïve and semi naïve Bayes network models.

    PubMed

    Carvajal, Guido; Roser, David J; Sisson, Scott A; Keegan, Alexandra; Khan, Stuart J

    2015-11-15

    Risk management for wastewater treatment and reuse have led to growing interest in understanding and optimising pathogen reduction during biological treatment processes. However, modelling pathogen reduction is often limited by poor characterization of the relationships between variables and incomplete knowledge of removal mechanisms. The aim of this paper was to assess the applicability of Bayesian belief network models to represent associations between pathogen reduction, and operating conditions and monitoring parameters and predict AS performance. Naïve Bayes and semi-naïve Bayes networks were constructed from an activated sludge dataset including operating and monitoring parameters, and removal efficiencies for two pathogens (native Giardia lamblia and seeded Cryptosporidium parvum) and five native microbial indicators (F-RNA bacteriophage, Clostridium perfringens, Escherichia coli, coliforms and enterococci). First we defined the Bayesian network structures for the two pathogen log10 reduction values (LRVs) class nodes discretized into two states (< and ?1 LRV) using two different learning algorithms. Eight metrics, such as Prediction Accuracy (PA) and Area Under the receiver operating Curve (AUC), provided a comparison of model prediction performance, certainty and goodness of fit. This comparison was used to select the optimum models. The optimum Tree Augmented naïve models predicted removal efficiency with high AUC when all system parameters were used simultaneously (AUCs for C. parvum and G. lamblia LRVs of 0.95 and 0.87 respectively). However, metrics for individual system parameters showed only the C. parvum model was reliable. By contrast individual parameters for G. lamblia LRV prediction typically obtained low AUC scores (AUC < 0.81). Useful predictors for C. parvum LRV included solids retention time, turbidity and total coliform LRV. The methodology developed appears applicable for predicting pathogen removal efficiency in water treatment systems generally. PMID:26342914

  9. VARIATION OF KOC IN SURFACE SEDIMENTS FROM NARRAGANSETT BAY AND LONG ISLAND SOUND: ANALYSIS OF THE ROLE OF OTHER PARTICULATE CHARACTERISTICS

    EPA Science Inventory

    In the first part of this investigation, we examined whether differences in the Kocs of three nonpolar organic chemicals (Lindane, fluoranthene, tetrachlorinated biphenyl (PCB)) from five sites along the New England coast were statistically significant. Although no statistical di...

  10. Improved log(gf) Values for Lines of Ni I and New Nickel Abundances in the Sun and the Metal-Poor Star HD 84937

    NASA Astrophysics Data System (ADS)

    Lawler, James E.; Wood, M. P.; Sneden, C.; Cowan, J. J.

    2014-01-01

    New atomic transition probability measurements for 371 lines of Ni I in the UV through near IR are reported. These results are used to determine the Ni abundance of the Sun and a very metal-poor main-sequence turnoff dwarf star over a range of wavelength and E. P. values to search for non-LTE effects. For reasons only partially understood, strong lines of Ni I are unusually prone to optical depth errors in emission studies on laboratory sources. Branching fractions from data recorded using a Fourier transform spectrometer (FTS) and a 3 m echelle spectrometer are combined with published radiative lifetimes from laser induced fluorescence measurements to determine these new transition probabilities. The large echelle spectrometer provides essential UV sensitivity, spectral resolution, and especially freedom from multiplex noise that is needed to eliminate optical depth errors. There is quite good agreement with earlier, but less extensive, sets of measurements by Blackwell et al. (MNRAS 1989, 236, 235) and Wickliffe & Lawler (ApJS 1997 110, 1163). The new Ni I data are applied to high resolution visible and UV spectra of the Sun and HD 84937 to derive new, more accurate nickel abundances. In the Sun we find log(eps(Ni I)) = 6.28 (sigma = 0.06, 75 lines) and in HD 84937 we find we find log(eps(Ni I)) = 3.89 (sigma = 0.09, 77 lines), yielding [Ni/Fe] = -0.08 from log(eps(Fe)) = 7.52 in the Sun and log(eps(Fe)) = 5.19 in HD 84937. The Saha balance of Ni in HD 84937 is confirmed using 8 lines of Ni II, although these UV ion lines are somewhat saturated. This work is supported by NASA grant NNX10AN93G (JEL) and NSF grants AST-0908978 and AST-1211585 (CS).

  11. Improved Co I log(gf) Values and Abundance Determinations in the Photospheres of the Sun and Metal-poor Star HD 84937

    NASA Astrophysics Data System (ADS)

    Lawler, J. E.; Sneden, C.; Cowan, J. J.

    2015-09-01

    New emission branching fraction measurements for 898 lines of the first spectrum of cobalt (Co i) are determined from hollow cathode lamp spectra recorded with the National Solar Observatory 1 m Fourier transform spectrometer on Kitt Peak, AZ and a high-resolution echelle spectrometer. Published radiative lifetimes from laser induced fluorescence measurements are combined with the branching fractions to determine accurate absolute atomic transition probabilities for the 898 lines. Hyperfine structure (hfs) constants for levels of neutral Co in the literature are surveyed and selected values are used to generate complete hfs component patterns for 195 transitions of Co i. These new laboratory data are applied to determine the Co abundance in the Sun and metal-poor star HD 84937, yielding log ?(Co) = 4.955 ± 0.007 (? = 0.059) based on 82 Co i lines and log ?(Co) = 2.785 ± 0.008 (? = 0.065) based on 66 Co i lines, respectively. A Saha or ionization balance test on the photosphere of HD 84937 is performed using 16 UV lines of Co ii, and good agreement is found with the Co i result in this metal-poor ([Fe i/H] = -2.32, [Fe ii/H] = -2.32) dwarf star. The resulting value of [Co/Fe] = +0.14 supports a rise of Co/Fe at low metallicity that has been suggested in other studies.

  12. IMPROVED V I log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect

    Lawler, J. E.; Wood, M. P.; Den Hartog, E. A.; Feigenson, T.; Sneden, C.; Cowan, J. J. E-mail: mpwood@wisc.edu E-mail: tfeigenson@wisc.edu E-mail: cowan@nhn.ou.edu

    2015-01-01

    New emission branching fraction measurements for 836 lines of the first spectrum of vanadium (V I) are determined from hollow cathode lamp spectra recorded with the National Solar Observatory 1 m Fourier transform spectrometer (FTS) and a high-resolution echelle spectrometer. The branching fractions are combined with recently published radiative lifetimes from laser-induced fluorescence measurements to determine accurate absolute atomic transition probabilities for the 836 lines. The FTS data are also used to extract new hyperfine structure A coefficients for 26 levels of neutral vanadium. These new laboratory data are applied to determine the V abundance in the Sun and metal-poor star HD 84937, yielding log ?(V) = 3.956 ± 0.004 (? = 0.037) based on 93 V I lines and log ?(V) = 1.89 ± 0.03 (? = 0.07) based on nine V I lines, respectively, using the Holweger-Müller 1D model. These new V I abundance values for the Sun and HD 84937 agree well with our earlier determinations based upon V II.

  13. Improved log(gf) Values for Lines of Ti II and New Titanium Abundances in the Sun and the Metal-Poor Star HD 84937

    NASA Astrophysics Data System (ADS)

    Wood, Michael P.; Lawler, J. E.; Sneden, C.; Cowan, J. J.

    2013-01-01

    New atomic transition probability measurements for 364 lines of Ti II in the UV through near IR are reported. These results are used to determine the Ti abundance of the Sun and a very metal-poor main-sequence turnoff dwarf star over a range of wavelength and E. P. values to search for non-LTE effects. Branching fractions from data recorded using a Fourier transform spectrometer (FTS) and a 3 m echelle spectrometer are combined with published radiative lifetimes from laser induced fluorescence measurements to determine these new transition probabilities. The new results are in generally good agreement with previously reported FTS measurements and the NIST Atomic Spectra Database. The use of a new echelle spectrometer, new radiometric calibration methods, and independent data analysis routines allows for a reduction of systematic errors and overall improvement in transition probability uncertainties over previous measurements. This work represents the largest and most complete single source of Ti II transition probabilities to date in this wavelength range. The new Ti II data are applied to high resolution visible and UV spectra of the Sun and HD 84937 to derive new, more accurate titanium abundances. We use 36 lines from the solar photosphere to derive log(?(Ti))=4.98 (?=0.03), in good agreement with the recommended Ti abundance from previous solar abundance reviews and in very good agreement with our solar abundance derived using Ti I. For HD 84937, a preliminary analysis with a subset of available Ti II lines yields log(?(Ti))=3.12 (?=0.04, 19 lines), or [Ti/H]=-1.86, also in very good agreement with our abundance derived using Ti I. This work is supported by NASA grant NNX10AN93G and NSF grant AST-1211055 (JEL) and NSF grants AST-0908978 and AST-1211585 (CS).

  14. IMPROVED V II log(gf) VALUES, HYPERFINE STRUCTURE CONSTANTS, AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect

    Wood, M. P.; Lawler, J. E.; Den Hartog, E. A.; Sneden, C.; Cowan, J. J. E-mail: jelawler@wisc.edu E-mail: chris@verdi.as.utexas.edu

    2014-10-01

    New experimental absolute atomic transition probabilities are reported for 203 lines of V II. Branching fractions are measured from spectra recorded using a Fourier transform spectrometer and an echelle spectrometer. The branching fractions are normalized with radiative lifetime measurements to determine the new transition probabilities. Generally good agreement is found between this work and previously reported V II transition probabilities. Two spectrometers, independent radiometric calibration methods, and independent data analysis routines enable a reduction in systematic uncertainties, in particular those due to optical depth errors. In addition, new hyperfine structure constants are measured for selected levels by least squares fitting line profiles in the FTS spectra. The new V II data are applied to high resolution visible and UV spectra of the Sun and metal-poor star HD 84937 to determine new, more accurate V abundances. Lines covering a range of wavelength and excitation potential are used to search for non-LTE effects. Very good agreement is found between our new solar photospheric V abundance, log ?(V) = 3.95 from 15 V II lines, and the solar-system meteoritic value. In HD 84937, we derive [V/H] = –2.08 from 68 lines, leading to a value of [V/Fe] = 0.24.

  15. Thermal conditions of the central Sinai Microplate inferred from new surface heat-flow values and continuous borehole temperature logging in central and southern Israel

    NASA Astrophysics Data System (ADS)

    Schütz, F.; Förster, H.-J.; Förster, A.

    2014-05-01

    This paper reports ten new surface heat-flow density (qs) values for central and southern Israel (central Sinai Microplate), whose crystalline crust and lithosphere formed as part of the Neoproterozoic Arabian-Nubian Shield. Heat flow was calculated in Mesozoic sediments using the classical approach of heat-flow determination by implementing in the analysis high-precision continuous temperature logs obtained in air- and/or water-filled boreholes. Thermal conductivity (TC) measured for a large suite of rock samples of lithotypes making up the sequence was assigned to temperature gradients in intervals for which the lithology was known. The heat-flow values obtained for different depth intervals in a borehole as well as the average values for the individual borehole locations cover a narrow range, attesting heat-conduction conditions. A steady-state thermal model along an E-W crustal cross section through the area shows that the observed systematic spatial distribution of the qs values, which range between 50 and 62 mW m-2, can primarily be explained by variations in the thickness of the upper crust and in the ratio between sedimentary and crystalline rocks therein. Given the time lapse of thermal heat transfer through the lithosphere, the qs data monitor the crustal thermal conditions prior to rift- and plume-related lithospheric thermal perturbations that have started in the larger area ca. 30 Ma ago. Observed and modeled qs display the best fit for a pre-Oligocene lithosphere-asthenosphere boundary (LAB) at ˜150 km, which would be at the upper end of LAB depths determined from stable areas of the Arabian Shield (150-120 km) not affected by the young, deep-seated thermal processes that have caused a further uprise of the LAB. Our data imply or predict that the surface heat flow of the Sinai Microplate generally tends to increase along N-S and W-E traverses, from ˜45-50 mW m-2 to ˜55-60 mW m-2. Surface heat flows on the order of 55-60 mW m-2 may be common in the northern Arabian Shield, where it exhibits typical lithosphere structure and composition and is unaffected by young heating processes, compared to values of ?45 mW m-2 recently determined in the southern Arabian Plate for the Arabian Platform.

  16. Improved log(gf) Values for Lines of V I and V II, New Vanadium Abundances in the Sun and the Metal-Poor Star HD 84937

    NASA Astrophysics Data System (ADS)

    Lawler, James E.; Wood, Michael P.; Den Hartog, Elizabeth; Feigenson, Thomas; Sneden, Chris; Cowan, John J.

    2015-01-01

    New emission branching fraction measurements for 836 lines of the first spectrum of vanadium (V I) and 203 lines of V II are determined from hollow cathode lamp spectra recorded with the National Solar Observatory 1m Fourier transform spectrometer (FTS) and a high resolution echelle spectrometer. The branching fractions are combined with new radiative lifetimes from laser induced fluorescence measurements to determine accurate absolute atomic transition probabilities for 1039 lines of V I and V II. The FTS data are also used to extract new hyperfine structure A coefficients for both spectra. These new laboratory data are applied to determine the V abundance in the Sun and metal-poor star HD 84937, yielding log ?(V) = 3.96 (? = 0.04) based on 93 V I lines and log ?(V) = 1.89 (? = 0.07) based on nine V I lines respectively, and yielding log ?(V) = 3.95 (? = 0.05) based on 15 V II lines and log ?(V) = 1.87 (? = 0.07) based on 68 V II lines respectively1-3.1. Wood et al., ApJS 214:18 (2014), 2. Den Hartog et al. ApJS in press (2014), 3. Lawler et al. ApJS submitted (2014). This work is supported by NASA grant NNX10AN93G (JEL), NSF AST-1211055 (EDH & JEL), and NSF AST-1211585 (CS).

  17. ILLEGAL LOGGING IN INDONESIA

    E-print Network

    ILLEGAL LOGGING IN INDONESIA THE ENVIRONMENTAL, ECONOMIC AND SOCIAL COSTS #12;ILLEGAL LOGGING IN INDONESIA THE ENVIRONMENTAL, ECONOMIC AND SOCIAL COSTS Contents Executive Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 #12;ILLEGAL LOGGING IN INDONESIA | 2 Executive Summary Indonesia's rainforests are the third

  18. CRYPTOSPORIDIUM LOG INACTIVATION CALCULATION METHODS

    EPA Science Inventory

    Appendix O of the Surface Water Treatment Rule (SWTR) Guidance Manual introduces the CeffT10 (i.e., reaction zone outlet C value and T10 time) method for calculating ozone CT value and Giardia and virus log inactivation. The LT2ESWTR Pre-proposal Draft Regulatory Language for St...

  19. Teff and log g Determinations

    E-print Network

    Barry Smalley

    2005-09-19

    A discussion on the determination of effective temperature (Teff) and surface gravity (log g) is presented. The observational requirements for model-independent fundamental parameters are summarized, including an assessment of the accuracy of these values for the Sun and Vega. The use of various model-dependent techniques for determining Teff and log g are outlined, including photometry, flux fitting, and spectral line ratios. A combination of several of these techniques allows for the assessment of the quality of our parameter determinations. While some techniques can give precise parameter determinations, the overall accuracy of the values is significantly less and sometimes difficult to quantify.

  20. Lecture 16 --Atomicity via Logging 4/7/2014 Last time: General model of transactions

    E-print Network

    variable: append an entry to the log. read variable: scan the log looking for last committed value. [ slide, but not strictly needed). recover from a crash: do nothing. Quick demo: rm DB LOG cat l16-demo.txt ./wal-sys.py 16-demo.txt cat LOG How can we optimize read performance? Keep both a log and "cell storage". Log

  1. NSTX RUN LOG] NSTX RUN LOG

    E-print Network

    Princeton Plasma Physics Laboratory

    NSTX RUN LOG] NSTX RUN LOG Joule milestone: 18 weeks; programmatic goal: 20 weeks. Completed(8 RUN LOG] 2/26/04 9.1 168.8 4.2 21 15 Fast ion spectrum XP-417 2/27/04 9.8 178.6 4.5 18 16 Long-pulse H.2 45 43 HHFW Current Drive XP-403 #12;NSTX RUN LOG] 4/22/04 13.6 382.7 9.6 27 25 HHFW Heating with NB H

  2. Log-Tool

    SciTech Connect

    2012-05-21

    Log files are typically semi- or un-structured. To be useable for visualization and machine learning, they need to be parsed into a standard, structured format. Log-tool is a tool for facilitating the parsing, structuring, and routing of log files (e.g. intrusion detection long, web server logs, system logs). It consists of three main components: (1) Input ? it will input data from files, standard input, and syslog, (2) Parser ? it will parse the log file based on regular expressions into structured data (JSNO format), (3) Output ? it will output structured data into commonly used formats, including Redis (a database), standard output, and syslog.

  3. Log-Tool

    Energy Science and Technology Software Center (ESTSC)

    2012-05-21

    Log files are typically semi- or un-structured. To be useable for visualization and machine learning, they need to be parsed into a standard, structured format. Log-tool is a tool for facilitating the parsing, structuring, and routing of log files (e.g. intrusion detection long, web server logs, system logs). It consists of three main components: (1) Input ? it will input data from files, standard input, and syslog, (2) Parser ? it will parse the logmore »file based on regular expressions into structured data (JSNO format), (3) Output ? it will output structured data into commonly used formats, including Redis (a database), standard output, and syslog.« less

  4. LogScope

    NASA Technical Reports Server (NTRS)

    Havelund, Klaus; Smith, Margaret H.; Barringer, Howard; Groce, Alex

    2012-01-01

    LogScope is a software package for analyzing log files. The intended use is for offline post-processing of such logs, after the execution of the system under test. LogScope can, however, in principle, also be used to monitor systems online during their execution. Logs are checked against requirements formulated as monitors expressed in a rule-based specification language. This language has similarities to a state machine language, but is more expressive, for example, in its handling of data parameters. The specification language is user friendly, simple, and yet expressive enough for many practical scenarios. The LogScope software was initially developed to specifically assist in testing JPL s Mars Science Laboratory (MSL) flight software, but it is very generic in nature and can be applied to any application that produces some form of logging information (which almost any software does).

  5. SCHOOL WEEKLY MILEAGE LOG Team _____________________________ Mileage Log

    E-print Network

    ://walkacrosstexas.tamu.edu/ log in and enter the number of children walking, the number of days walked, and the number of miles for you on the website. Week number Estimated number of children walking Number of days walked this week, color, sex, disability, religion, age, or national origin. The Texas A&M University System, U

  6. Discerning Data-Logging.

    ERIC Educational Resources Information Center

    Newton, Leonard

    1998-01-01

    Offers some strategies for enabling science teachers to make better use of data-logging methods. These ideas are grounded in the belief that science teachers are expert lesson planners. Benefits gained for students using data-logging techniques are more likely to be secured through teachers re-interpreting their planning approaches in the new…

  7. Table S1. Intermediate phalangeal measurements for MGPT-PU 130504 from Moncucco Torinese, compared to mean values for a sample of extant cercopithecids and Mesopithecus spp., and log-transformed (with natural logarithms, ln) Mosimann shape variables deriv

    E-print Network

    Delson, Eric

    Table S1. Intermediate phalangeal measurements for MGPT-PU 130504 from Moncucco Torinese, compared Analysis (PCA) performed on the basis of log-transformed Mosimann shape variables of intermediate phalanges

  8. Preharvest drying of logging residues

    SciTech Connect

    Rogers, K.E.

    1981-12-01

    Logging residues are being utilized or being considered for fuel throughout the United States. Their use will increase substantially as oil, coal, and natural gas costs rise. To make logging residues economically competitive, maximum fuel energies need to be recovered during utilization. This can be done by correctly preparing the fuelwood prior to combustion. One potentially attractive fuel preparation technique is to allow these residues to dry in the field before harvest. Delaying the harvest of logging residues for 3 months in the winter allowed their moisture content (MC) to decrease. This enhanced the fuel value of loblolly pine, white oak, and sweetgum trees to varying degrees. The study was done in eastern Texas. Heartwood MCs of loblolly pine, white oak, and sweetgum decreased 50.1, 7.0, and 11.5 percent, respectively. Comparatively, sapwood MCs decreased 60.1, 23.8, and 28.5 percent, respectively, for the same species. Net fuel values increased 72.5 and 32.9 percent for loblolly pine sapwood and heartwood, 14.1 and 3.8 percent for white oak sapwood and heartwood, and 24.5 and 9.2 percent for sweetgum sapwood and heartwood. (Refs. 2).

  9. 6. Log calving barn. Interior view showing log postandbeam support ...

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

    6. Log calving barn. Interior view showing log post-and-beam support system and animal stalls. - William & Lucina Bowe Ranch, Log Calving Barn, 230 feet south-southwest of House, Melrose, Silver Bow County, MT

  10. Log-sine evaluations of Mahler measures

    E-print Network

    Jonathan M. Borwein; Armin Straub

    2011-03-20

    We provide evaluations of several recently studied higher and multiple Mahler measures using log-sine integrals. This is complemented with an analysis of generating functions and identities for log-sine integrals which allows the evaluations to be expressed in terms of zeta values or more general polylogarithmic terms. The machinery developed is then applied to evaluation of further families of multiple Mahler measures.

  11. Log smoldering after an amazonian deforestation fire

    NASA Astrophysics Data System (ADS)

    Rabelo, E. R. C.; Veras, C. A. G.; Carvalho, J. A.; Alvarado, E. C.; Sandberg, D. V.; Santos, J. C.

    The characteristics of log smoldering after an Amazonian deforestation fire are described. The experiment was carried out in 2001 at the Caiabi farm, near the city of Alta Floresta, state of Mato Grosso, Brazil, as part of a set of tests that have been performed in the same area since 1997. A 200×200 m 2 test area was slashed in the beginning of June and burned on 20 August. The area contained 507 logs with diameter at breast height (DBH) higher than 10 cm, per hectare. In the day following the main burn 59 logs were found to remain smoldering, a number that corresponds to 2.9% of the total in the area. We chose 11 of the 59 logs to have their smoldering process monitored. Their diameter, moisture content and CHN dry biomass composition after the plot burn and before smoldering were determined. Other parameters such as temperature distribution while smoldering, porosity, density and mass volatilized during thermogravimetric test were also determined. Average smoldering speeds were in the range from 0.8 to 1.5 cm h -1 for logs that smoldered without transition to the flaming regime. The average speed increased to 2.1 cm h -1 for those logs that oscillated between smoldering and flaming. The speeds were lower overnight as compared to values determined during daytime for the same log. Higher log moisture contents were found to produce decreased speeds. Micro-porous biomass was not observed in the set of the 11 selected logs. Smoldering was observed to occur at substantial intensity in crossing of logs, with no longitudinal propagation.

  12. Engineered Log Jam

    USGS Multimedia Gallery

    Engineered Log Jam on the lower river opposite the new Lower Klallam Tribe Fish Hatchery. The Lower Elwha Klallam Tribe project creates salmon habitat on the lower Elwha River in preparation for dam removal and habitat restoration....

  13. Blood Glucose Log

    MedlinePLUS

    ... Of ThiS page. If you have high blood glucose , make notes in your log and talk with ... physical activity, or diabetes medicines. Having low blood glucose means that your blood glucose level is too ...

  14. Transfer Log.xls

    Cancer.gov

    ANIMAL TRANSFER LOG Date of Move: ________________ Cage Type C = Auto Water NOTES: B = Water Bottle S = SMZ M = Microisolator ASP # PI GROUP NAME # CAGES [+] ROOM TO DOB COMMENTS STRAIN CODE NEW GROUP NAME NEW ROOM CAGE TYPE PEDIGREE # EAR

  15. M01506020006 log check dam

    E-print Network

    XY! ¬« 35-0027 M01506020006 log check dam M01506020007 log check dam M01506020001 log check dam M Berm Channel/swale Check dam Sediment trap/basin Gabion Seed and mulch Cap Established vegetation SWMU

  16. M01506020006 log check dam

    E-print Network

    XY! ¬« 35-0027 M01506020006 log check dam M01506020007 log check dam M01506020001 log check dam M location Berm Channel/swale Check dam Sediment trap/basin Gabion Seed and mulch Cap Established vegetation

  17. Automatic Log Analysis System Integration

    E-print Network

    Maguire Jr., Gerald Q.

    learning system, called the Awesome Automatic Log Analysis Application (AALAA), is used at Ericsson automatisera denna analysprocess har ett maskininlärningssystem utvecklats, Awesome Automatic Log Analysis

  18. 4. Log chicken house (far left foreground), log bunkhouse (far ...

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

    4. Log chicken house (far left foreground), log bunkhouse (far left background), one-room log cabin (left of center background), log root cellar (center), post-and-beam center in foreground, and blacksmith shop (far right foreground). View to southeast. - William & Lucina Bowe Ranch, County Road 44, 0.1 mile northeast of Big Hole River Bridge, Melrose, Silver Bow County, MT

  19. G8 Illegal Logging Dialogue G8 Illegal Logging Dialogue

    E-print Network

    G8 Illegal Logging Dialogue G8 Illegal Logging Dialogue A global legislator partnership for legal International http://www.illegal-logging.info/item_single.php?item=presentation&item_id=133&approach_id=8 #12;G8 Illegal Logging Dialogue Presentation purpose · role of GLOBE International · aim and objectives of the G8

  20. Logging in to Bear Tracks Logging in to Bear Tracks

    E-print Network

    Wang, Hao "Howard"

    Logging in to Bear Tracks #12;Logging in to Bear Tracks In this topic, you will learn how to log in to Bear Tracks using a Campus Computing ID (CCID) and password. You will begin by navigating to: https://www.beartracks.ualberta.ca #12;Logging in to Bear Tracks Step 1 This is the Bear Tracks login page. Use the Bear Tracks login

  1. Ionization of Functional Groups: The Meaning and Use of the pKa Values Following our discussion of "weak binding forces", solubility, and LogP, we can see that the

    E-print Network

    Gates, Kent. S.

    's review a few facts about acid-base ionization reactions. The acidity for a given functional group related to the Ka is pKa: Defined as: pKa = -logKa. Consider the acid-base ionization of a common functional group found in drugs, the carboxylic acid group. The carboxylic acid group can exist

  2. 3D GPR Imaging of Wooden Logs

    NASA Astrophysics Data System (ADS)

    Halabe, Udaya B.; Pyakurel, Sandeep

    2007-03-01

    There has been a lack of an effective NDE technique to locate internal defects within wooden logs. The few available elastic wave propagation based techniques are limited to predicting E values. Other techniques such as X-rays have not been very successful in detecting internal defects in logs. If defects such as embedded metals could be identified before the sawing process, the saw mills could significantly increase their production by reducing the probability of damage to the saw blade and the associated downtime and the repair cost. Also, if the internal defects such as knots and decayed areas could be identified in logs, the sawing blade can be oriented to exclude the defective portion and optimize the volume of high valued lumber that can be obtained from the logs. In this research, GPR has been successfully used to locate internal defects (knots, decays and embedded metals) within the logs. This paper discusses GPR imaging and mapping of the internal defects using both 2D and 3D interpretation methodology. Metal pieces were inserted in a log and the reflection patterns from these metals were interpreted from the radargrams acquired using 900 MHz antenna. Also, GPR was able to accurately identify the location of knots and decays. Scans from several orientations of the log were collected to generate 3D cylindrical volume. The actual location of the defects showed good correlation with the interpreted defects in the 3D volume. The time/depth slices from 3D cylindrical volume data were useful in understanding the extent of defects inside the log.

  3. NMR logging apparatus

    DOEpatents

    Walsh, David O; Turner, Peter

    2014-05-27

    Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within an earth borehole. The surface instrumentation may comprise a power amplifier, which may be coupled to the downhole probes via one or more transmission lines, and a controller configured to cause the power amplifier to generate a NMR activating pulse or sequence of pulses. Impedance matching means may be configured to match an output impedance of the power amplifier through a transmission line to a load impedance of a downhole probe. Methods may include deploying the various elements of disclosed NMR logging apparatus and using the apparatus to perform NMR measurements.

  4. Efficient, Compromise Resilient and Append-Only Cryptographic Schemes for Secure Audit Logging

    E-print Network

    Reiter, Michael

    Efficient, Compromise Resilient and Append-Only Cryptographic Schemes for Secure Audit Logging value of audit logs, it is vital to provide compro- mise resiliency and append-only properties in a logging system to prevent ac- tive attackers. Unfortunately, existing symmetric secure logging schemes

  5. Logging on to Learn

    ERIC Educational Resources Information Center

    Butler, Kevin

    2010-01-01

    A classroom lecture at Capistrano Connections Academy in Southern California involves booting up the home computer, logging on to a Web site, and observing a teacher conducting a PowerPoint presentation of that day's lesson entirely online. Through microphone headsets, students can watch on their home computers, respond to the teacher's questions,…

  6. Borehole Geophysical Logging

    USGS Multimedia Gallery

    USGS hydrologist conducts borehole geophysical logging as part of an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize bioremediation of contaminated groundwater. This research is being conducted at the Brandywine Defense Reutilization and M...

  7. Logs Perl Module

    Energy Science and Technology Software Center (ESTSC)

    2007-04-04

    A perl module designed to read and parse the voluminous set of event or accounting log files produced by a Portable Batch System (PBS) server. This module can filter on date-time and/or record type. The data can be returned in a variety of formats.

  8. ,"_' ",',-i_~ :FORESTRY AND LOGGING

    E-print Network

    ":~I> ", .' '. ,"_' ",',-i_~ . :FORESTRY AND LOGGING Hcscarch on Plantation Species A Positive in plantation forestry. par- ticularly in the tropics and the Southern Hemisphere. in the past 30 years plantation forestry. Indeed, one could list many exam- ples of such problems that have plagued exotic

  9. Log of Apollo 11.

    ERIC Educational Resources Information Center

    National Aeronautics and Space Administration, Washington, DC.

    The major events of the first manned moon landing mission, Apollo 11, are presented in chronological order from launch time until arrival of the astronauts aboard the U.S.S. Hornet. The log is descriptive, non-technical, and includes numerous color photographs of the astronauts on the moon. (PR)

  10. Interactive Reflective Logs

    ERIC Educational Resources Information Center

    Deaton, Cynthia Minchew; Deaton, Benjamin E.; Leland, Katina

    2010-01-01

    The authors created an interactive reflective log (IRL) to provide teachers with an opportunity to use a journal approach to record, evaluate, and communicate student understanding of science concepts. Unlike a traditional journal, the IRL incorporates prompts to encourage students to discuss their understanding of science content and science…

  11. Log-sine evaluations of Mahler measures, II

    E-print Network

    David Borwein; Jonathan M. Borwein; Armin Straub; James Wan

    2011-03-15

    We continue the analysis of higher and multiple Mahler measures using log-sine integrals as started in "Log-sine evaluations of Mahler measures" and "Special values of generalized log-sine integrals" by two of the authors. This motivates a detailed study of various multiple polylogarithms and worked examples are given. Our techniques enable the reduction of several multiple Mahler measures, and supply an easy proof of two conjectures by Boyd.

  12. Using the LAS format - part I. [Well log files

    SciTech Connect

    Elphcik, R.Y.

    1991-12-01

    A program that will read in an LAS (Logging ASCII Standard) formatted file, perform a simple log analysis, and place the results in another LAS format file is developed. When the input LAS format is read, certain parameters needed for the log analysis are looked for - if any parameter is not found, the user is asked to supply a value. The output file contains all the pertinent parameters and useful information. Codes for Amiga and Macintosh computers are given.

  13. Log evaluation of oil-bearing igneous rocks

    SciTech Connect

    Khatchikian, A.

    1983-12-01

    The evaluation of porosity, water saturation and clay content of oilbearing igneous rocks with well logs is difficult due to the mineralogical complexity of this type of rocks. The log responses to rhyolite and rhyolite tuff; andesite, dacite and zeolite tuff; diabase and basalt have been studied from examples in western Argentina and compared with values observed in other countries. Several field examples show how these log responses can be used in a complex lithology program to make a complete evaluation.

  14. LogN--LogS Studies of EGRET Sources

    NASA Astrophysics Data System (ADS)

    Reimer, O.; Thompson, D. J.

    2001-08-01

    A comprehensive investigation of logN-logS distributions of gamma-ray sources discovered by EGRET has been performed for subsequent use in population studies. Existing models explaining the spatial arrangement of unidentified sources do not compare against an observed logN-logS distribution. However, viable population models not only have to reproduce the logN-logS distribution for different source classes globally, they have to correspond to apparent differences among their spatial, spectral and variability characteristics. Furthermore, it needs to be understood in which way results from selections among the unidentified sources like "persistent" (Grenier, 2000) or "steady" sources (Gehrels et al., 2000) are related to the overall picture regarding their logN-logS characteristics.

  15. 2. Onroom log cabin (right), log root cellar (center), tworoom ...

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

    2. On-room log cabin (right), log root cellar (center), two-room log cabin (left), and post-and-beam garage (background). View to southwest. - William & Lucina Bowe Ranch, County Road 44, 0.1 mile northeast of Big Hole River Bridge, Melrose, Silver Bow County, MT

  16. 12. Upstream view showing thelower log pond log chute in ...

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

    12. Upstream view showing thelower log pond log chute in the main channel of the Hudson River. The log chute in the dam can be seen in the background. Facing southwest. - Glens Falls Dam, 100' to 450' West of U.S. Route 9 Bridge Spanning Hudson River, Glens Falls, Warren County, NY

  17. Internet Data logging and Display 

    E-print Network

    Sweeney, J., Jr.; Culp, C.; Haberl, J. S.

    2001-01-01

    The current energy savings technology relies on conventional data logging systems, in which two major barriers exist. Formost is the fact that retrieving the energy data is not convenient, and the cost of the data logging ...

  18. Measured logs vs. calculated logs for seismic interpretation

    SciTech Connect

    Cline, W.M. )

    1989-10-01

    The author discusses advantages to using calculated pseudo-sonic and pseudo-density logs, for synthetic seismogram generation, when the necessary measured sonic and density logs are not available. The most fundamental, and most critical, step in seismic interpretation is tying geologic information (i.e., log tops, faults, etc.) to the seismic data. Improper conversion from depth to time will produce erroneous results in the interpretation and mapping stages. Two tools discussed in this paper are the checkshot survey and synthetic seismograms generated from sonic logs (and density logs when they are available).

  19. How to Keep an Infusion Log: Intravenous Immune Globulin (IVIG)

    MedlinePLUS

    How to keep an INFUSION LOG Intravenous Immune Globulin (IVIG) How to keep an INFUSION LOG The Value of Keeping Records Excellence in health care ... keeping track of your Intravenous Immune Globulin (IVIG) infusions. Each of the manufacturers prepares IVIG in a ...

  20. Grid Logging: Best Practices Guide

    SciTech Connect

    Tierney, Brian L; Tierney, Brian L; Gunter, Dan

    2008-04-01

    The purpose of this document is to help developers of Grid middleware and application software generate log files that will be useful to Grid administrators, users, developers and Grid middleware itself. Currently, most of the currently generated log files are only useful to the author of the program. Good logging practices are instrumental to performance analysis, problem diagnosis, and security auditing tasks such as incident tracing and damage assessment. This document does not discuss the issue of a logging API. It is assumed that a standard log API such as syslog (C), log4j (Java), or logger (Python) is being used. Other custom logging API or even printf could be used. The key point is that the logs must contain the required information in the required format. At a high level of abstraction, the best practices for Grid logging are: (1) Consistently structured, typed, log events; (2) A standard high-resolution timestamp; (3) Use of logging levels and categories to separate logs by detail and purpose; (4) Consistent use of global and local identifiers; and (5) Use of some regular, newline-delimited ASCII text format. The rest of this document describes each of these recommendations in detail.

  1. Dipole shear anisotropy logging

    SciTech Connect

    Esmersoy, C.; Kane, M.; Koster, K.; Williams, M.; Boyd, A.

    1994-12-31

    Sonic-scale shear anisotropy of formations are obtained from dipole-shear measurements acquired by orthogonal source and receiver pairs. These measurements resemble miniature 4-component shear VSP surveys inside the borehole. Data from two orthogonal sources and an array of orthogonal receivers are processed providing three main logs; the fast and slow shear slownesses, and the fast shear polarization angle. Potential applications include: shale anisotropy for better seismic models, maximum stress and fracture/microcrack strike direction for horizontal well drilling and fracture height and azimuth determination in hydraulic fracturing.

  2. Terminology Extraction from Log Files

    NASA Astrophysics Data System (ADS)

    Saneifar, Hassan; Bonniol, Stéphane; Laurent, Anne; Poncelet, Pascal; Roche, Mathieu

    The log files generated by digital systems can be used in management information systems as the source of important information on the condition of systems. However, log files are not exhaustively exploited in order to extract information. The classical methods of information extraction such as terminology extraction methods are irrelevant to this context because of the specific characteristics of log files like their heterogeneous structure, the special vocabulary and the fact that they do not respect a natural language grammar. In this paper, we introduce our approach Exterlog to extract the terminology from log files. We detail how it deals with the particularity of such textual data.

  3. 3. Log bunkhouse (far left), log chicken house (left of ...

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

    3. Log bunkhouse (far left), log chicken house (left of center), equipment shed (center), and workshop (far right). View to northwest. - William & Lucina Bowe Ranch, County Road 44, 0.1 mile northeast of Big Hole River Bridge, Melrose, Silver Bow County, MT

  4. Maintaining ecosystem function and services in logged tropical forests.

    PubMed

    Edwards, David P; Tobias, Joseph A; Sheil, Douglas; Meijaard, Erik; Laurance, William F

    2014-09-01

    Vast expanses of tropical forests worldwide are being impacted by selective logging. We evaluate the environmental impacts of such logging and conclude that natural timber-production forests typically retain most of their biodiversity and associated ecosystem functions, as well as their carbon, climatic, and soil-hydrological ecosystem services. Unfortunately, the value of production forests is often overlooked, leaving them vulnerable to further degradation including post-logging clearing, fires, and hunting. Because logged tropical forests are extensive, functionally diverse, and provide many ecosystem services, efforts to expand their role in conservation strategies are urgently needed. Key priorities include improving harvest practices to reduce negative impacts on ecosystem functions and services, and preventing the rapid conversion and loss of logged forests. PMID:25092495

  5. Minimal Log Gravity

    E-print Network

    Gaston Giribet; Yerko Vásquez

    2015-01-07

    Minimal Massive Gravity (MMG) is an extension of three-dimensional Topologically Massive Gravity that, when formulated about Anti-de Sitter space, accomplishes to solve the tension between bulk and boundary unitarity that other models in three dimensions suffer from. We study this theory at the chiral point, i.e. at the point of the parameter space where one of the central charges of the dual conformal field theory vanishes. We investigate the non-linear regime of the theory, meaning that we study exact solutions to the MMG field equations that are not Einstein manifolds. We exhibit a large class of solutions of this type, which behave asymptotically in different manners. In particular, we find analytic solutions that represent two-parameter deformations of extremal Banados-Teitelboim-Zanelli (BTZ) black holes. These geometries behave asymptotically as solutions of the so-called Log Gravity, and, despite the weakened falling-off close to the boundary, they have finite mass and finite angular momentum, which we compute. We also find time-dependent deformations of BTZ that obey Brown-Henneaux asymptotic boundary conditions. The existence of such solutions show that Birkhoff theorem does not hold in MMG at the chiral point. Other peculiar features of the theory at the chiral point, such as the degeneracy it exhibits in the decoupling limit of the Cotton tensor, are discussed.

  6. Acoustic paramagnetic logging tool

    DOEpatents

    Vail, III, William B. (Bothell, WA)

    1988-01-01

    New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth3 s magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation . The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores.

  7. Oracle Log Buffer Queueing

    SciTech Connect

    Rivenes, A S

    2004-12-08

    The purpose of this document is to investigate Oracle database log buffer queuing and its affect on the ability to load data using a specialized data loading system. Experiments were carried out on a Linux system using an Oracle 9.2 database. Previous experiments on a Sun 4800 running Solaris had shown that 100,000 entities per minute was an achievable rate. The question was then asked, can we do this on Linux, and where are the bottlenecks? A secondary question was also lurking, how can the loading be further scaled to handle even higher throughput requirements? Testing was conducted using a Dell PowerEdge 6650 server with four CPUs and a Dell PowerVault 220s RAID array with 14 36GB drives and 128 MB of cache. Oracle Enterprise Edition 9.2.0.4 was used for the database and Red Hat Linux Advanced Server 2.1 was used for the operating system. This document will detail the maximum observed throughputs using the same test suite that was used for the Sun tests. A detailed description of the testing performed along with an analysis of bottlenecks encountered will be made. Issues related to Oracle and Linux will also be detailed and some recommendations based on the findings.

  8. Well Logging with Californium-252

    SciTech Connect

    Boulogne, A.R.

    2003-01-06

    Californium-252 is an intense neutron emitter that has only recently become available for experimental well logging. The purpose of this research is to investigate the application of well logging to groundwater hydrology; however, most of the techniques and purposes are quite similar to applications in the petroleum industry.

  9. October 2006 LOG MANAGEMENT: USING

    E-print Network

    October 2006 LOG MANAGEMENT: USING COMPUTER AND NETWORK RECORDS TO IMPROVE INFORMATION SECURITY LOG MANAGEMENT: USING COMPUTER AND NETWORK RECORDS TO IMPROVE INFORMATION SECURITY Shirley Radack, Editor and Technology The information that is routinely collected about specific events occurring within information

  10. Degraded lands worth protecting: the biological importance of Southeast Asia's repeatedly logged forests

    PubMed Central

    Edwards, David P.; Larsen, Trond H.; Docherty, Teegan D. S.; Ansell, Felicity A.; Hsu, Wayne W.; Derhé, Mia A.; Hamer, Keith C.; Wilcove, David S.

    2011-01-01

    Southeast Asia is a hotspot of imperilled biodiversity, owing to extensive logging and forest conversion to oil palm agriculture. The degraded forests that remain after multiple rounds of intensive logging are often assumed to be of little conservation value; consequently, there has been no concerted effort to prevent them from being converted to oil palm. However, no study has quantified the biodiversity of repeatedly logged forests. We compare the species richness and composition of birds and dung beetles within unlogged (primary), once-logged and twice-logged forests in Sabah, Borneo. Logging had little effect on the overall richness of birds. Dung beetle richness declined following once-logging but did not decline further after twice-logging. The species composition of bird and dung beetle communities was altered, particularly after the second logging rotation, but globally imperilled bird species (IUCN Red List) did not decline further after twice-logging. Remarkably, over 75 per cent of bird and dung beetle species found in unlogged forest persisted within twice-logged forest. Although twice-logged forests have less biological value than primary and once-logged forests, they clearly provide important habitat for numerous bird and dung beetle species. Preventing these degraded forests from being converted to oil palm should be a priority of policy-makers and conservationists. PMID:20685713

  11. Requirements-Driven Log Analysis Extended Abstract

    NASA Technical Reports Server (NTRS)

    Havelund, Klaus

    2012-01-01

    Imagine that you are tasked to help a project improve their testing effort. In a realistic scenario it will quickly become clear, that having an impact is diffcult. First of all, it will likely be a challenge to suggest an alternative approach which is significantly more automated and/or more effective than current practice. The reality is that an average software system has a complex input/output behavior. An automated testing approach will have to auto-generate test cases, each being a pair (i; o) consisting of a test input i and an oracle o. The test input i has to be somewhat meaningful, and the oracle o can be very complicated to compute. Second, even in case where some testing technology has been developed that might improve current practice, it is then likely difficult to completely change the current behavior of the testing team unless the technique is obviously superior and does everything already done by existing technology. So is there an easier way to incorporate formal methods-based approaches than the full edged test revolution? Fortunately the answer is affirmative. A relatively simple approach is to benefit from possibly already existing logging infrastructure, which after all is part of most systems put in production. A log is a sequence of events, generated by special log recording statements, most often manually inserted in the code by the programmers. An event can be considered as a data record: a mapping from field names to values. We can analyze such a log using formal methods, for example checking it against a formal specification. This separates running the system for analyzing its behavior. It is not meant as an alternative to testing since it does not address the important in- put generation problem. However, it offers a solution which testing teams might accept since it has low impact on the existing process. A single person might be assigned to perform such log analysis, compared to the entire testing team changing behavior.

  12. Enhanced carbon-oxygen log interpretations using supplemental log curves

    SciTech Connect

    Wyatt, D.F. Jr.; Jacobson, L.A.; Fox, P.

    1994-12-31

    Supplemental measurements from induced nuclear spectrometry tools are examined to demonstrate what additional information they provide about the well and reservoir conditions. Logs in shut-in wells from Indonesia provide examples of oxygen activation measurements showing cross-flow from one reservoir to another via open perforations. Leaking squeezed perforations were also observed. An example from Alaska shows radioactive scale build-up in the casing which spectral analysis identifies as a mixture of uranium and thorium salts. Another log, where the casing fluid was replaced with crude oil, demonstrates a technique for identifying cement channels. Logs from Nigeria comparing oil saturation estimates before and after a squeeze operation illustrate the effect of casing fluid flushing of the formation through open perforations. Understanding the diagnostic character of these curves leads to higher confidence in the overall log interpretation process.

  13. Some properties of the log-Laplace distribution

    SciTech Connect

    Uppuluri, V.R.R.

    1980-01-01

    A random variable Y is said to have the Laplace distribution or the double exponential distribution whenever its probability density function is given by lambda exp(-lambda abs. value y), where -infinity < y < infinity and lambda > 0. The random variable X = exp(Y) is said to have the log-Laplace distribution. With the problem of extrapolation to low doses in dose response curves as motivation, an axiomatic characterization of the log-Laplace distribution is obtained. 1 figure.

  14. Some properties of the log-Laplace distribution

    SciTech Connect

    Uppuluri, V.R.R.

    1980-08-01

    A random variable ..gamma.. is said to have the Laplace distribution or the double exponential distribution whenever its probability density function is given by lambda exp(-lambda absolute value (y)), where -infinity < y < infinity and lambda > 0. The random variable X = exp(..gamma..) is said to have the log-Laplace distribution. With the problem of extrapolation to low doses in dose response curves as a motivation, an axiomatic characterization of the log-Laplace distribution is obtained. 1 figure.

  15. Bayesian analysis of generalized log-Burr family with R.

    PubMed

    Akhtar, Md Tanwir; Khan, Athar Ali

    2014-01-01

    Log-Burr distribution is a generalization of logistic and extreme value distributions, which are important reliability models. In this paper, Bayesian approach is used to model reliability data for log-Burr model using analytic and simulation tools. Laplace approximation is implemented for approximating posterior densities of the parameters. Moreover, parallel simulation tools are also implemented using 'LaplacesDemon' package of R. PMID:24839586

  16. New materials for fireplace logs

    NASA Technical Reports Server (NTRS)

    Kieselback, D. J.; Smock, A. W.

    1971-01-01

    Fibrous insulation and refractory concrete are used for logs as well as fireproof walls, incinerator bricks, planters, and roof shingles. Insulation is lighter and more shock resistant than fireclay. Lightweight slag bonded with refractory concrete serves as aggregrate.

  17. Animal Room Log.xls

    Cancer.gov

    ANIMAL ROOM LOG Room Number: __________ Cage Type Death Cause C = Auto Water EU = Euthanized NOTES: B = Water Bottle FD = Found Dead S = SMZ DR = Drowned M = Microisolator MI = Missing TO = Transfer Out DEATH CAUSE STRAIN CODE GROUP NAME # ? # ? COMMENTS

  18. Voting Systems Audit Log Study David Wagner

    E-print Network

    Wagner, David

    Voting Systems Audit Log Study David Wagner University of California, Berkeley June 1, 2010 #12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 How audit logs are used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Examples of audit logs

  19. Forest Products: Apparatus for Removing Bark from Whole Logs

    SciTech Connect

    Poole, L; Recca, L.

    1999-01-29

    Order this fact sheet now to learn how replacing the ''closed drum'' debarking technology method used in the forest industry with the ''open drum'' method saves time and production costs, and increases the economic value of wood products by inflicting less damage on logs so that they can be used for high-value economic products.

  20. Log N --Log S distribution as a new test for cooling curves of neutron stars

    E-print Network

    Popov, Sergei

    Log N -- Log S distribution as a new test for cooling curves of neutron stars S.B. Popov # , H as an independent approach to test the physics governing the star cooling. Theoretical LogN­LogS distributions different cooling scenar­ ios and found that comparison with the observed LogN­LogS of isolated neutron

  1. Well-logging activities in Russia

    SciTech Connect

    Savostyanov, N.A. )

    1993-09-01

    The report is a brief survey of the current state of well-logging service in Russia (number and types of crews, structure of well-logging jobs, types of techniques used, well-logging equipment, auxiliary downhole jobs, etc.). Types and peculiarities of well data acquisition and processing hardware and software are discussed (petrophysics included). New well-logging technologies used in Russia (new methods of electric logging data processing, electromagnetic logging, pulse neutron logging, nuclear magnetic resonance logging, acoustic tomography, logging-testing-logging technique, etc.) are surveyed. Comparison of the Tengiz field (Kazakhstan) well data obtained by Schlumberger and Neftegazgeofizika Association crews is given. Several problems and drawbacks in equipment and technology used by well-logging crews in Russia are discussed.

  2. Log amplifier with pole-zero compensation

    DOEpatents

    Brookshier, W.

    1985-02-08

    A logarithmic amplifier circuit provides pole-zero compensation for improved stability and response time over 6-8 decades of input signal frequency. The amplifer circuit includes a first operational amplifier with a first feedback loop which includes a second, inverting operational amplifier in a second feedstock loop. The compensated output signal is provided by the second operational amplifier with the log elements, i.e., resistors, and the compensating capacitors in each of the feedback loops having equal values so that each break point is offset by a compensating break point or zero.

  3. log z = ramo princip. del log definito su C\\{z C : z 0} da log z = log |z| + i Arg z log+ z = ramo del log definito su C\\{z C : z 0} da log+ z = log |z| + i arg(0,2) z

    E-print Network

    Presilla, Carlo

    F03 Notazioni · log z = ramo princip. del log definito su C\\{z C : z 0} da log z = log |z| + i Arg z · log+ z = ramo del log definito su C\\{z C : z 0} da log+ z = log |z| + i arg(0,2) z · f(x + i z = 4i 3 (e) tan z = 5i 3 Risp: (d) z = k + i(-1)k log 3, k Z. (e) z = (k + 1/2) + i log 2, k Z

  4. Defect Detection in Wooden Logs Using Ground Penetrating Radar

    NASA Astrophysics Data System (ADS)

    Halabe, Udaya B.; Agrawal, Sachin; Gopalakrishnan, Bhaskaran; Grushecky, Shawn

    2007-03-01

    Presently there are no suitable non-invasive methods for precisely detecting the subsurface defects in logs in real time. Internal defects such as knots, decays, and embedded metals are of greatest concern for lumber production. Nondestructive scanning of logs using Ground Penetrating Radar (GPR) to detect defects in logs prior to sawing can greatly increase the productivity and yield of high value lumber, and prevent damage to saw blade from embedded metals. In this research, the GPR scanned data has been analyzed to detect subsurface defects such as metals, decays, and knots. Also, GPR offers high speed scanning capability which is needed for future on-line implementation in saw mills. This paper explains the advantages of the GPR technique, experimental setup and parameters used, and data processing for detection of subsurface defects in logs. The results show that GPR can be a very promising technique for future on-line implementation in saw mills.

  5. Log Truck-Weighing System

    NASA Technical Reports Server (NTRS)

    1977-01-01

    ELDEC Corp., Lynwood, Wash., built a weight-recording system for logging trucks based on electronic technology the company acquired as a subcontractor on space programs such as Apollo and the Saturn launch vehicle. ELDEC employed its space-derived expertise to develop a computerized weight-and-balance system for Lockheed's TriStar jetliner. ELDEC then adapted the airliner system to a similar product for logging trucks. Electronic equipment computes tractor weight, trailer weight and overall gross weight, and this information is presented to the driver by an instrument in the cab. The system costs $2,000 but it pays for itself in a single year. It allows operators to use a truck's hauling capacity more efficiently since the load can be maximized without exceeding legal weight limits for highway travel. Approximately 2,000 logging trucks now use the system.

  6. Biomass from Logging Residue and Mill Residue

    E-print Network

    Biomass from Logging Residue and Mill Residue in East Texas, 2003 By Weihuan Xu, Ph.D., Principal on the availability of woody biomass in the form of logging and mill residue in East Texas. Residue data estimates). 1 #12;Logging Residue Types of logging residue include stumps, tops, limbs and unutilized cull trees

  7. April 27, 2010 Well Logging I

    E-print Network

    Ito, Garrett

    4/26/2010 1 GG450 April 27, 2010 Well Logging I Today's material comes from p. 501-541 in the text in commercial holes, so geophysical logs are used for correlation between wells and for determining whether oil geophysical logs are used to "fill in" between cored sections. Advantages of Logging Provides objective

  8. Method for induced polarization logging

    SciTech Connect

    Vinegar, H.J.; Waxman, M.H.

    1987-04-14

    A method is described for generating a log of the formation phase shift, resistivity and spontaneous potential of an earth formation from data obtained from the earth formation with a multi-electrode induced polarization logging tool. The method comprises obtaining data samples from the formation at measurement points equally spaced in time of the magnitude and phase of the induced voltage and the magnitude and phase of the current supplied by a circuit through a reference resistance R/sub 0/ to a survey current electrode associated with the tool.

  9. Detecting Botnets Through Log Correlation

    E-print Network

    Al-Hammadi, Yousof

    2010-01-01

    Botnets, which consist of thousands of compromised machines, can cause significant threats to other systems by launching Distributed Denial of Service (SSoS) attacks, keylogging, and backdoors. In response to these threats, new effective techniques are needed to detect the presence of botnets. In this paper, we have used an interception technique to monitor Windows Application Programming Interface (API) functions calls made by communication applications and store these calls with their arguments in log files. Our algorithm detects botnets based on monitoring abnormal activity by correlating the changes in log file sizes from different hosts.

  10. Investigation on log responses of bulk density and thermal neutrons in coalbed with different ranks

    NASA Astrophysics Data System (ADS)

    Zhao, Peiqiang; Mao, Zhiqiang; Jin, Ding; Zhao, Peihua; Sun, Baodian; Sun, Wei; Pang, Xu

    2015-06-01

    Density and neutron logs play an important role in the exploration of coalbed methane (CBM) reservoirs. However, the study of these two log responses of coalbeds is deficient. Based on laboratory data in the published literature and field logs of CBM reservoirs from several coal basins in China, this paper focuses on acquiring and analyzing variations in bulk density and thermal neutrons of coal with different ranks. Two new methods are introduced to correct the effect of ash on field logs to obtain the log values of ash-free coal. The corrected coalbed density logs are in accordance with the density of coal samples in the laboratory. Then, hydrogen indices of coals with different ranks are simulated, and the corrected neutron logs are well verified by simulated values. After obtaining the variations of density and neutrons of coalbeds with different ranks, the behaviors of density and neutron logs are analyzed and discussed. Based on the laboratory data and the simulated and corrected field logs, the specific values of density and neutron porosity for ash-free coals with higher ranks are listed. Furthermore, a crossplot of density versus neutron logs is proposed to identify coal ranks, which has been successfully applied to various CBM fields of several basins in China.

  11. Predicting Dividends in Log-Linear Present Value Models

    E-print Network

    , and Geert Bekaert, Joe Chen, Jun Liu, Geert Rouwenhorst, and Tuomo Vuolteenaho for helpful discussions. I; and Ang and Bekaert, 2007). On the other hand, Hodrick (1992) t-statistics are well-behaved and have

  12. Case history on geothermal-well-log interpretation: Surprise Valley, California

    SciTech Connect

    Rigby, F.A.; Zebal, G.P.

    1981-06-01

    Well logs from a 1972 geothermal well drilled in California's Surprise Valley are discussed. The well is in an igneous formation, primarily basalt in the logged interval, and had a bottom-hole temperature of about 170/sup 0/C at a total depth exceeding 1400 m. It produced good flow rates from what is presumably a formation with predominately fracture-related permeability. The well has special interest because fractures could be located approximately by the appearance of well-defined secondary crystallization in the drill cuttings. The original use of the log data in evaluating the well when it was drilled is discussed. In addition, the log data are reviewed and valuable data are obtained on log response in basalts, the effects of secondary mineralization, fracture detection, and aspects of the resistivity logs. The Surprise Valley well gives a clear demonstration of the value of thorough logging in geothermal exploratory wells, especially in the identification and location of potential production zones.

  13. A New Approach to Logging.

    ERIC Educational Resources Information Center

    Miles, Donna

    2001-01-01

    In response to high numbers of preventable fatal accidents in the logging industry, the Occupational Safety and Health Administration (OSHA) developed a week-long logger safety training program that includes hands-on learning of safety techniques in the woods. Reaching small operators has been challenging; outreach initiatives in Maine, North…

  14. Australian Government on ILLEGAL logging

    E-print Network

    Australian Government the AXE on ILLEGAL logging Bringing down a practical approach AN AUSTRALIAN GOVERNMENT DISCUSSION PAPER WRITTEN SUBMISSIONS ON THE AUSTRALIAN GOVERNMENT DISCUSSION PAPER ARE INVITED also acting as good stewards of the world's environment. While the Australian Government has

  15. Downhole Memory-Logging Tools

    SciTech Connect

    Lysne, Peter

    1992-03-24

    Logging technologies developed for hydrocarbon resource evaluation have not migrated into geothermal applications even though data so obtained would strengthen reservoir characterization efforts. Two causative issues have impeded progress: (1) there is a general lack of vetted, high-temperature instrumentation, and (2) the interpretation of log data generated in a geothermal formation is in its infancy. Memory-logging tools provide a path around the first obstacle by providing quality data at a low cost. These tools feature onboard computers that process and store data, and newer systems may be programmed to make ''decisions''. Since memory tools are completely self-contained, they are readily deployed using the slick line found on most drilling locations. They have proven to be rugged, and a minimum training program is required for operator personnel. Present tools measure properties such as temperature and pressure, and the development of noise, deviation, and fluid conductivity logs based on existing hardware is relatively easy. A more complex geochemical tool aimed at a quantitative analysis of potassium, uranium and thorium will be available in about one year, and it is expandable into all nuclear measurements common in the hydrocarbon industry. A second tool designed to sample fluids at conditions exceeding 400 C (752 F) is in the proposal stage. Partnerships are being formed between the geothermal industry, scientific drilling programs, and the national laboratories to define and develop inversion algorithms relating raw tool data to more pertinent information.

  16. L16: Logging 6.033 Spring 2014

    E-print Network

    L16: Logging Sam Madden 6.033 Spring 2014 #12;Transaction terminology xfer(a, b, amt): begin write with a log read(log, var): commits = { } for record r in log[len(log)-1] .. log[0]: if (r.type == commit.new_val #12;Read your own writes read(log, var): commits = { } for record r in log[len(log)-1] .. log[0

  17. Avian responses to selective logging shaped by species traits and logging practices.

    PubMed

    Burivalova, Zuzana; Lee, Tien Ming; Giam, Xingli; ?ekercio?lu, Ça?an Hakk?; Wilcove, David S; Koh, Lian Pin

    2015-06-01

    Selective logging is one of the most common forms of forest use in the tropics. Although the effects of selective logging on biodiversity have been widely studied, there is little agreement on the relationship between life-history traits and tolerance to logging. In this study, we assessed how species traits and logging practices combine to determine species responses to selective logging, based on over 4000 observations of the responses of nearly 1000 bird species to selective logging across the tropics. Our analysis shows that species traits, such as feeding group and body mass, and logging practices, such as time since logging and logging intensity, interact to influence a species' response to logging. Frugivores and insectivores were most adversely affected by logging and declined further with increasing logging intensity. Nectarivores and granivores responded positively to selective logging for the first two decades, after which their abundances decrease below pre-logging levels. Larger species of omnivores and granivores responded more positively to selective logging than smaller species from either feeding group, whereas this effect of body size was reversed for carnivores, herbivores, frugivores and insectivores. Most importantly, species most negatively impacted by selective logging had not recovered approximately 40 years after logging cessation. We conclude that selective timber harvest has the potential to cause large and long-lasting changes in avian biodiversity. However, our results suggest that the impacts can be mitigated to a certain extent through specific forest management strategies such as lengthening the rotation cycle and implementing reduced impact logging. PMID:25994673

  18. Chemical logging of geothermal wells

    DOEpatents

    Allen, Charles A. (Idaho Falls, ID); McAtee, Richard E. (Idaho Falls, ID)

    1981-01-01

    The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase in the ratio of the concentrations of calcium to carbonate and bicarbonate ions is indicative of the existence of a warm or hot geothermal aquifer at some increased depth.

  19. Tucker Wireline Open Hole Wireline Logging

    SciTech Connect

    Milliken, M.

    2002-05-23

    The Tucker Wireline unit ran a suite of open hole logs right behind the RMOTC logging contractor for comparison purposes. The tools included Dual Laterolog, Phased Induction, BHC Sonic, and Density-Porosity.

  20. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH NOT MORE THAN EIGHT EMPLOYEES ARE EMPLOYED § 788.9 “Preparing * * * logs.”...

  1. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH NOT MORE THAN EIGHT EMPLOYEES ARE EMPLOYED § 788.9 “Preparing * * * logs.”...

  2. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH NOT MORE THAN EIGHT EMPLOYEES ARE EMPLOYED § 788.9 “Preparing * * * logs.”...

  3. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH NOT MORE THAN EIGHT EMPLOYEES ARE EMPLOYED § 788.9 “Preparing * * * logs.”...

  4. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH NOT MORE THAN EIGHT EMPLOYEES ARE EMPLOYED § 788.9 “Preparing * * * logs.”...

  5. Sugarcane Log Turning Ltd. Business Plan

    E-print Network

    Sugarcane Log Turning Ltd. Business Plan Prepared by: Jordan Barlow Sarah Saddler Kimberley LeDrew Morgan Kennah WOOD 465 April 14, 2004 #12;ii EXECUTIVE SUMMARY Sugarcane Log Turning (SCLT) is a unique

  6. University of Florida Cell Phone Usage Log

    E-print Network

    Sin, Peter

    University of Florida Cell Phone Usage Log Information below must be compared to the monthly statement provided by the cell phone service provider. It is required that this log be completed when of the last page of the usage log. Employee's Name:Business Device - Cell Phone Number: Printed Name

  7. Biomass from Logging Residue and Mill Residue

    E-print Network

    Biomass from Logging Residue and Mill Residue in East Texas, 2008 by Curtis L. VanderSchaaf, Forest and mill residue in East Texas. Residue data estimates are based on a mill survey conducted by Texas Forest those in Southeast Texas are filled. #12;Logging Residue Types of logging residue include stumps, tops

  8. Balloon logging with the inverted skyline

    NASA Technical Reports Server (NTRS)

    Mosher, C. F.

    1975-01-01

    There is a gap in aerial logging techniques that has to be filled. The need for a simple, safe, sizeable system has to be developed before aerial logging will become effective and accepted in the logging industry. This paper presents such a system designed on simple principles with realistic cost and ecological benefits.

  9. Successional Changes in Carbon Stocks After Logging

    E-print Network

    Successional Changes in Carbon Stocks After Logging and Deforestation for Agriculture in Interior, such as clear- cut logging and deforestation for agricultural devel- opment. Here we investigated impacts of logging in uplands and agricultural deforestation in lowlands on C and nitrogen (N) stocks in Interior

  10. Time-Dilation, Log N - Log P, and Cosmology

    E-print Network

    R. J. Nemiroff; J. P. Norris; J. T. Bonnell; J. D. Scargle

    1996-02-01

    We investigate whether a simple cosmology can fit GRB results in both time dilation and Log N - Log P simultaneously. Simplifying assumptions include: all GRBs are spectrally identical to BATSE trigger 143, $\\Omega=1$ universe, and no luminosity and number density evolution. Observational data used includes: the BATSE 3B peak brightness distribution (64-ms time scale), the Pioneer Venus Orbiter (PVO) brightness distribution, and the Norris et al. time dilation results for peak aligned profiles presented at this meeting. We find acceptable cosmological fits to the brightness distributions when placing BATSE trigger 143 at a redshift of 0.15 $\\pm$ 0.10. This translates into a $(1 + z_{dim}) / (1 + z_{bright})$ factor of about 1.50 $\\pm$ 0.50 between selected brightness extremes of the Norris et al. sample. Norris et al. estimate, however, that $(1 + z_{dim}) / (1 + z_{bright})$ $\\approx$ 2.0 $\\pm$ 0.5 when considering duration tests. The difference is marginal and could be accounted for by evolution. We therefore find that evolution of GRBs is preferred but not demanded.

  11. Where Do Developers Log? An Empirical Study on Logging Practices in Industry

    E-print Network

    Xie, Tao

    Where Do Developers Log? An Empirical Study on Logging Practices in Industry Qiang Fu 1 , Jieming University of Illinois at Urbana-Champaign, IL, USA taoxie@illinois.edu ABSTRACT System logs are widely used in various tasks of software system management. It is crucial to avoid logging too little or too much

  12. Illegal timber logging in Vietnam: Who profits from forest privatization connected with a logging ban?

    E-print Network

    1 Illegal timber logging in Vietnam: Who profits from forest privatization connected with a logging University, Berlin Abstract: This paper examines how forest land allocation and a logging ban influence the distribution of income from illegal timber logging in northern Vietnam. The Vietnamese government implemented

  13. Data Mining of Network Logs

    NASA Technical Reports Server (NTRS)

    Collazo, Carlimar

    2011-01-01

    The statement of purpose is to analyze network monitoring logs to support the computer incident response team. Specifically, gain a clear understanding of the Uniform Resource Locator (URL) and its structure, and provide a way to breakdown a URL based on protocol, host name domain name, path, and other attributes. Finally, provide a method to perform data reduction by identifying the different types of advertisements shown on a webpage for incident data analysis. The procedures used for analysis and data reduction will be a computer program which would analyze the URL and identify and advertisement links from the actual content links.

  14. LHCb: Universal Logging System for LHCb

    E-print Network

    Nikolaidis, F; Garnier, J-C; Neufeld, N

    2010-01-01

    In a large-scale IT infrastructure such as the LHCb Online system many applications are running on thousands of machines producing many GBs of logs every day. Although most of the logs are just routine logs, some of them may indicate an attack, a malfunction or provide vital debugging information. Due to their volume only automatisation of the analysis of the logs can provide us with an efficient way to handle all of these logs, ensuring that even the most rare logs will be processed. We present a centralized logging system which allow us to do in-depth analysis of every log. The description of the architecture includes information from how we integrate logging from many devices to a centralized server using syslog and in particular how a correlation can indicate an attack. Special emphasis is given both to security monitoring as well as to the logs that indicate developing malfunctions. To secure our network we have deployed the most known of HIDS, NIDS , LIDS (Host , Network, Log intrusion detection). Each ...

  15. Crosswell logging for acoustic impedance

    SciTech Connect

    Iverson, W.P.

    1986-01-01

    Crosswell seismic data are recorded by placing the seismic source in one well and receivers in a second well in order to measure physical properties between two wells. When reflected seismic energy is extracted from the recorded seismograms, the resulting picture is a function of acoustic impedance (density times velocity) between the wells. Previous crosswell seismic studies have predominantly utilized direct waves and measure only seismic velocities by tomographic techniques. Synthetic crosswell seismic data is generated by a computer to illustrate the concepts and procedures used for crosswell impedance logging in this study. Such synthetics are useful for investigating how the experiment should work, but real data reveals how the experiment does work. Crosswell seismic data recorded at the MWX site in western Colorado revealed a few surprises when compared with synthetic data. Real data consists of a lot more than simple direct arrivals and reflections. There are numerous converted waves, borehole (tube) waves, and general noise. Source directivity proves to be a very limiting problem as energy is concentrated in a horizontal plane perpendicular to the borehole. The final product of crosswell logging for acoustic impedance is a seismogram similar to the classic CDP seismogram recorded on the surface for exploration. The crosswell data in this paper is in the kilohertz range as opposed to surface data which is generally below 100 hertz. Kilohertz seismic data can theoretically resolve layer as thin a two feet vertically. Actual resolution indicated is about 5 to 10 feet.

  16. Annual Logging Symposium, June 16-20, 2012 IMPROVED ESTIMATION OF PORE CONNECTIVITY AND

    E-print Network

    Torres-Verdín, Carlos

    , such as (a) very high resistivity readings in the oil zone, (b) separation of apparent resistivity logs-size distributions, water saturation, and inter-connected porosity. Permeability values estimated from dynamic

  17. Correlating Log Messages for System Diagnostics

    SciTech Connect

    Gunasekaran, Raghul; Dillow, David A; Shipman, Galen M; Maxwell, Don E; Hill, Jason J; Park, Byung H; Geist, Al

    2010-01-01

    In large-scale computing systems, the sheer volume of log data generated presents daunting challenges for debugging and monitoring of these systems. The Oak Ridge Leadership Computing Facility s premier simulation platform, the Cray XT5 known as Jaguar, can generate a few hundred thousand log entries in less than a minute for many system level events. Determining the root cause of such system events requires analyzing and interpretation of a large number of log messages. Most often, the log messages are best understood when they are interpreted collectively rather than individually. In this paper, we present our approach to interpreting log messages by identifying their commonalities and grouping them into clusters. Given a set of log messages within a time interval, we group the messages based on source, target, and/or error type, and correlate the messages with hardware and application information. We monitor the Lustre log messages in the XT5 console log and show that such grouping of log messages assists in detecting the source of system events. By intelligent grouping and correlation of events in the log, we are able to provide system administrators with meaningful information in a concise format for root cause analysis.

  18. Coal log pipeline pilot plant construction and tests: An update

    SciTech Connect

    Liu, H.; Lenau, C.W.; Lin, Y.; Burkett, B.

    1999-07-01

    Coal log pipeline (CLP) is an emerging technology for coal transportation that has many potential values including: (a) it transports twice the amount of coal transported by a coal slurry pipeline of the same diameter; (b) it uses only one-third to one-fourth the water used by a coal slurry pipeline for transporting the same amount of coal; (c) it does not require expensive slurry pumps; (d) dewatering of slurry at the pipeline outlet is much simpler for CLP than slurry pipelines; (e) there is no restart problem; (f) it is adaptable to drag reduction by using polymers and hence is energy efficient; (g) it eliminates air and land polluting problems caused by coal transportation by truck or train; (h) it completely eliminates spontaneous combustion during coal transportation and storage at power plants; (i) it eliminates highway congestion and accidents caused by coal trucks, and eliminates accidents and traffic jam at rail crossings caused by coal trains; (j) it is more economical to use CLP than to use truck and trains to transport coal in many circumstances. Since 1991, extensive research in CLP has been conducted at Capsule Pipeline Research Center (CPRC), University of Missouri-Columbia. The research has been sponsored by the National Science Foundation, U.S. Department of Energy, Missouri Department of Economic Development, Electric Power Research Institute (EPRI), and an industry consortium of two dozen companies. The R and D resulted in rapid advancement of the CLP technology. After a pilot plant testing of a complete CLP system, the CLP technology will be ready for commercial use. The pilot plant consists of: (a) A coal log machine that can mass produce 5.4-inch diameter coal logs; (b) A 6-inch-diameter steel pipe 3,000 ft long, equipped with a special pumping system that allows coal logs to bypass the pump unhindered (Being a closed loop, the pipeline can recirculate coal logs through the system indefinitely, for testing coal log abrasion resistance over any distance.); (c) A coal log injection system that can inject long trains (each consisting of 100 logs) into the pipe for testing; (d) A coal log ejection system that can eject the coal logs from the pipe after testing; and (e) An automatic control system for the pipeline, consisting of sensors and computers (PLCs and a SCADA). At the time of writing this abstract (November, 1998), the pilot plant is more than half completed the coal log machine has been built and the pipeline is under construction. The entire system will be completed in Spring 1999, followed by various tests. This paper, to be submitted in June 1999, will contain details on the CLP pilot plant construction and the results of preliminary tests. The test results will cover coal log manufacturing (compaction), coal log abrasion tests in the 6-inch pipe, and test of drag reduction in the 6-inch pipe.

  19. An outline of the log minimal model program for the moduli space of curves

    E-print Network

    Hyeon, Donghoon

    2010-01-01

    Hassett and Keel predicted that there is a descending sequence of critical $\\alpha$ values where the log canonical model for the moduli space of stable curves with respect to $\\alpha \\delta$ changes. We derive a conjectural formula for the critical values in two different ways, by working out the intersection theory of the moduli space of hyperelliptic curves and by computing the GIT stability of certain curves with tails and bridges. The results give a rough outline of how the log minimal model program would proceed, telling us when the log canonical model changes and which curves are to be discarded and acquired at the critical steps.

  20. Leak checker data logging system

    SciTech Connect

    Payne, J.J.; Gannon, J.C.

    1994-12-31

    A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

  1. Leak checker data logging system

    DOEpatents

    Gannon, Jeffrey C. (Arlington, TX); Payne, John J. (Waterman, IL)

    1996-01-01

    A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

  2. Leak checker data logging system

    DOEpatents

    Gannon, J.C.; Payne, J.J.

    1996-09-03

    A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time. 18 figs.

  3. Analysis of Web Proxy Logs

    NASA Astrophysics Data System (ADS)

    Fei, Bennie; Eloff, Jan; Olivier, Martin; Venter, Hein

    Network forensics involves capturing, recording and analysing network audit trails. A crucial part of network forensics is to gather evidence at the server level, proxy level and from other sources. A web proxy relays URL requests from clients to a server. Analysing web proxy logs can give unobtrusive insights to the browsing behavior of computer users and provide an overview of the Internet usage in an organisation. More importantly, in terms of network forensics, it can aid in detecting anomalous browsing behavior. This paper demonstrates the use of a self-organising map (SOM), a powerful data mining technique, in network forensics. In particular, it focuses on how a SOM can be used to analyse data gathered at the web proxy level.

  4. Crosswell logging for acoustic impedance

    SciTech Connect

    Iverson, W.P.

    1988-01-01

    Crosswell seismic data are recorded by placing the seismic source in one well and receivers in a second well to measure physical properties between the two wells. When reflected seismic energy is extracted from the recorded seismograms, the resultant picture is a function of acoustic impedance (density times velocity) between the wells. Previous crosswell seismic studies have predominantly used direct waves and measure only seismic velocities by tomographic techniques. Synthetic crosswell seismic data are generated by a computer to illustrate the concepts and procedures used for crosswell impedance logging in this study. Such synthetics are useful for investigating how the experiment should work, but real data reveal how the experiment does work. Crosswell seismic data recorded at the Multiwell Experiment (MWX) site in western Colorado revealed a few surprises when compared with synthetic data. Real data consist of a lot more than simple direct arrivals and reflections. There are numerous converted waves, borehole (tube) waves, and general noise. Source directivity proves to be a very limiting problem, because energy is concentrated in a horizontal plane perpendicular to the borehole. The final product of crosswell logging for acoustic impedance is a seismogram similar to the classic CDP seismogram recorded on the surface for exploration. The crosswell data in this paper are in the kilohertz range as opposed to surface data, which are generally below 100 cycles/sec (100 Hz). Seismic data in the kilohertz range can theoretically resolve layers as thin as 2 ft (0.6 m) vertically. Actual resolution indicated is about 5 to 10 ft (1.5 to 3 m).

  5. Tractor-Logging Costs and Production

    E-print Network

    Tractor-Logging Costs and Production in Old-Growth Redwood Kenneth N. Boe U . S . F O R E S T S E R. Tractor-logging costs and production in old-growth redwood forests. Berkeley, Calif., Pacific SW. Forest-scale logging opera- tions in old-growth redwood during 2 years revealed that it cost $12.24 per M bd. ft

  6. Optimal message log reclamation for independent checkpointing

    NASA Technical Reports Server (NTRS)

    Wang, Yi-Min; Fuchs, W. Kent

    1993-01-01

    Independent (uncoordinated) check pointing for parallel and distributed systems allows maximum process autonomy but suffers from possible domino effects and the associated storage space overhead for maintaining multiple checkpoints and message logs. In most research on check pointing and recovery, it was assumed that only the checkpoints and message logs older than the global recovery line can be discarded. It is shown how recovery line transformation and decomposition can be applied to the problem of efficiently identifying all discardable message logs, thereby achieving optimal garbage collection. Communication trace-driven simulation for several parallel programs is used to show the benefits of the proposed algorithm for message log reclamation.

  7. Wean-Tail Log.xls

    Cancer.gov

    A SP #: ________________ _ Investigator: _________________ WEAN / TAIL CLIP LOG Strain: ___________________ Room Number: ___________________ STRAIN CODE WEAN DATE # ? # ? COMMENTS WATER A OR B # CAGES DOB TAILCLIP DATE CAGE / LITTER

  8. Flow rate logging seepage meter

    NASA Technical Reports Server (NTRS)

    Reay, William G. (Inventor); Walthall, Harry G. (Inventor)

    1996-01-01

    An apparatus for remotely measuring and logging the flow rate of groundwater seepage into surface water bodies. As groundwater seeps into a cavity created by a bottomless housing, it displaces water through an inlet and into a waterproof sealed upper compartment, at which point, the water is collected by a collection bag, which is contained in a bag chamber. A magnet on the collection bag approaches a proximity switch as the collection bag fills, and eventually enables the proximity switch to activate a control circuit. The control circuit then rotates a three-way valve from the collection path to a discharge path, enables a data logger to record the time, and enables a pump, which discharges the water from the collection bag, through the three-way valve and pump, and into the sea. As the collection bag empties, the magnet leaves the proximity of the proximity switch, and the control circuit turns off the pump, resets the valve to provide a collection path, and restarts the collection cycle.

  9. Shippers in Indonesia fight decree on illegal logging Shippers in Indonesia fight decree on illegal logging

    E-print Network

    Shippers in Indonesia fight decree on illegal logging Shippers in Indonesia fight decree on illegal Organization (ITTO), shippers in Indonesia are threatening to stop transporting logs if the government insists harvesting affects 700,000-850,000 hectares of forest per year in Indonesia, but widespread illegal logging

  10. Designing and Piloting a Leadership Daily Practice Log: Using Logs to Study the Practice of Leadership

    ERIC Educational Resources Information Center

    Spillane, James P.; Zuberi, Anita

    2009-01-01

    Purpose: This article aims to validate the Leadership Daily Practice (LDP) log, an instrument for conducting research on leadership in schools. Research Design: Using a combination of data sources--namely, a daily practice log, observations, and open-ended cognitive interviews--the authors evaluate the validity of the LDP log. Participants: Formal…

  11. Discover Presidential Log Cabins. Teacher's Discussion Guide.

    ERIC Educational Resources Information Center

    National Park Service (Dept. of Interior), Washington, DC.

    Discover Presidential Log Cabins is a set of materials designed to help educate 6-8 grade students about the significance of three log cabin sites occupied by George Washington, Ulysses Grant, Abraham Lincoln, and Theodore Roosevelt. This teacher's discussion guide is intended for use as part of a larger, comprehensive social studies program, and…

  12. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...is working logs out of the water, walking sticks 11 (safety sticks) shall be provided as follows: 11 A “walking stick” is two logs bolted or otherwise...attached on top that serves as a floating walking and working surface and that is...

  13. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...is working logs out of the water, walking sticks 11 (safety sticks) shall be provided as follows: 11 A “walking stick” is two logs bolted or otherwise...attached on top that serves as a floating walking and working surface and that is...

  14. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...is working logs out of the water, walking sticks 11 (safety sticks) shall be provided as follows: 11 A “walking stick” is two logs bolted or otherwise...attached on top that serves as a floating walking and working surface and that is...

  15. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...is working logs out of the water, walking sticks 11 (safety sticks) shall be provided as follows: 11 A “walking stick” is two logs bolted or otherwise...attached on top that serves as a floating walking and working surface and that is...

  16. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...is working logs out of the water, walking sticks 11 (safety sticks) shall be provided as follows: 11 A “walking stick” is two logs bolted or otherwise...attached on top that serves as a floating walking and working surface and that is...

  17. 29 CFR 1910.266 - Logging operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... OCCUPATIONAL SAFETY AND HEALTH STANDARDS Special Industries § 1910.266 Logging operations. (a) Table of... delivery, such as, but not limited to, marking danger trees and trees/logs to be cut to length, felling... rotating work platform meeting the requirements of 29 CFR 1910.68. (v) The employer shall assure that...

  18. 29 CFR 1910.266 - Logging operations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... OCCUPATIONAL SAFETY AND HEALTH STANDARDS Special Industries § 1910.266 Logging operations. (a) Table of... delivery, such as, but not limited to, marking danger trees and trees/logs to be cut to length, felling... rotating work platform meeting the requirements of 29 CFR 1910.68. (v) The employer shall assure that...

  19. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Environment 20 2011-07-01 2011-07-01 false Data logging. 89.409 Section 89.409 Protection of Environment...ENGINES Exhaust Emission Test Procedures § 89.409 Data logging. (a) A computer or any other automatic data...

  20. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Environment 21 2013-07-01 2013-07-01 false Data logging. 91.412 Section 91.412 Protection of Environment...ENGINES Gaseous Exhaust Test Procedures § 91.412 Data logging. (a) A computer or any other automatic data...

  1. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Environment 20 2010-07-01 2010-07-01 false Data logging. 89.409 Section 89.409 Protection of Environment...ENGINES Exhaust Emission Test Procedures § 89.409 Data logging. (a) A computer or any other automatic data...

  2. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Environment 21 2012-07-01 2012-07-01 false Data logging. 91.412 Section 91.412 Protection of Environment...ENGINES Gaseous Exhaust Test Procedures § 91.412 Data logging. (a) A computer or any other automatic data...

  3. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Environment 21 2013-07-01 2013-07-01 false Data logging. 90.412 Section 90.412 Protection of Environment...KILOWATTS Gaseous Exhaust Test Procedures § 90.412 Data logging. (a) A computer or any other automatic data...

  4. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Environment 21 2012-07-01 2012-07-01 false Data logging. 89.409 Section 89.409 Protection of Environment...ENGINES Exhaust Emission Test Procedures § 89.409 Data logging. (a) A computer or any other automatic data...

  5. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Environment 21 2013-07-01 2013-07-01 false Data logging. 89.409 Section 89.409 Protection of Environment...ENGINES Exhaust Emission Test Procedures § 89.409 Data logging. (a) A computer or any other automatic data...

  6. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Environment 20 2010-07-01 2010-07-01 false Data logging. 90.412 Section 90.412 Protection of Environment...KILOWATTS Gaseous Exhaust Test Procedures § 90.412 Data logging. (a) A computer or any other automatic data...

  7. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Environment 20 2010-07-01 2010-07-01 false Data logging. 91.412 Section 91.412 Protection of Environment...ENGINES Gaseous Exhaust Test Procedures § 91.412 Data logging. (a) A computer or any other automatic data...

  8. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Environment 20 2014-07-01 2013-07-01 true Data logging. 90.412 Section 90.412 Protection of Environment...KILOWATTS Gaseous Exhaust Test Procedures § 90.412 Data logging. (a) A computer or any other automatic data...

  9. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Environment 20 2014-07-01 2013-07-01 true Data logging. 91.412 Section 91.412 Protection of Environment...ENGINES Gaseous Exhaust Test Procedures § 91.412 Data logging. (a) A computer or any other automatic data...

  10. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Environment 20 2014-07-01 2013-07-01 true Data logging. 89.409 Section 89.409 Protection of Environment...ENGINES Exhaust Emission Test Procedures § 89.409 Data logging. (a) A computer or any other automatic data...

  11. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Environment 20 2011-07-01 2011-07-01 false Data logging. 91.412 Section 91.412 Protection of Environment...ENGINES Gaseous Exhaust Test Procedures § 91.412 Data logging. (a) A computer or any other automatic data...

  12. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Environment 20 2011-07-01 2011-07-01 false Data logging. 90.412 Section 90.412 Protection of Environment...KILOWATTS Gaseous Exhaust Test Procedures § 90.412 Data logging. (a) A computer or any other automatic data...

  13. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Environment 21 2012-07-01 2012-07-01 false Data logging. 90.412 Section 90.412 Protection of Environment...KILOWATTS Gaseous Exhaust Test Procedures § 90.412 Data logging. (a) A computer or any other automatic data...

  14. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... furnished and hung overside to the water's edge. (e) Jacob's ladder. When a log boom is being worked, a Jacob's ladder meeting the requirements of § 1918.23 shall be provided for each gang working alongside... Jacob's ladders are required for any single log boom being worked. (f) Life-ring. When working a...

  15. 29 CFR 1918.88 - Log operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... furnished and hung overside to the water's edge. (e) Jacob's ladder. When a log boom is being worked, a Jacob's ladder meeting the requirements of § 1918.23 shall be provided for each gang working alongside... Jacob's ladders are required for any single log boom being worked. (f) Life-ring. When working a...

  16. 47 CFR 87.109 - Station logs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Station logs. 87.109 Section 87.109 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AVIATION SERVICES Operating Requirements and Procedures Operating Procedures § 87.109 Station logs. (a) A station at a fixed location in the...

  17. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 3 2012-07-01 2012-07-01 false âPreparing * * * logs.â 788.9 Section 788.9 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH...

  18. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 3 2010-07-01 2010-07-01 false âPreparing * * * logs.â 788.9 Section 788.9 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH...

  19. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 3 2011-07-01 2011-07-01 false âPreparing * * * logs.â 788.9 Section 788.9 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH...

  20. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 3 2014-07-01 2014-07-01 false âPreparing * * * logs.â 788.9 Section 788.9 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH...

  1. 29 CFR 788.9 - “Preparing * * * logs.”

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 3 2013-07-01 2013-07-01 false âPreparing * * * logs.â 788.9 Section 788.9 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL POLICY OR INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS FORESTRY OR LOGGING OPERATIONS IN WHICH...

  2. Selective Logging in the Brazilian Amazon

    NASA Astrophysics Data System (ADS)

    Asner, Gregory P.; Knapp, David E.; Broadbent, Eben N.; Oliveira, Paulo J. C.; Keller, Michael; Silva, Jose N.

    2005-10-01

    Amazon deforestation has been measured by remote sensing for three decades. In comparison, selective logging has been mostly invisible to satellites. We developed a large-scale, high-resolution, automated remote-sensing analysis of selective logging in the top five timber-producing states of the Brazilian Amazon. Logged areas ranged from 12,075 to 19,823 square kilometers per year (+/-14%) between 1999 and 2002, equivalent to 60 to 123% of previously reported deforestation area. Up to 1200 square kilometers per year of logging were observed on conservation lands. Each year, 27 million to 50 million cubic meters of wood were extracted, and a gross flux of ~0.1 billion metric tons of carbon was destined for release to the atmosphere by logging.

  3. Selective logging in the Brazilian Amazon.

    PubMed

    Asner, Gregory P; Knapp, David E; Broadbent, Eben N; Oliveira, Paulo J C; Keller, Michael; Silva, Jose N

    2005-10-21

    Amazon deforestation has been measured by remote sensing for three decades. In comparison, selective logging has been mostly invisible to satellites. We developed a large-scale, high-resolution, automated remote-sensing analysis of selective logging in the top five timber-producing states of the Brazilian Amazon. Logged areas ranged from 12,075 to 19,823 square kilometers per year (+/-14%) between 1999 and 2002, equivalent to 60 to 123% of previously reported deforestation area. Up to 1200 square kilometers per year of logging were observed on conservation lands. Each year, 27 million to 50 million cubic meters of wood were extracted, and a gross flux of approximately 0.1 billion metric tons of carbon was destined for release to the atmosphere by logging. PMID:16239474

  4. What Value "Value Added"?

    ERIC Educational Resources Information Center

    Richards, Andrew

    2015-01-01

    Two quantitative measures of school performance are currently used, the average points score (APS) at Key Stage 2 and value-added (VA), which measures the rate of academic improvement between Key Stage 1 and 2. These figures are used by parents and the Office for Standards in Education to make judgements and comparisons. However, simple…

  5. ProcintLog: A GUI Academic Software For Open Hole Well-Logging Analysis

    NASA Astrophysics Data System (ADS)

    Silva, J. C.

    2005-05-01

    ProcintLog is a GUI academic software that runs under MATLAB and is useful for simplified conventional oil and gas well logs analysis. It works through two distinct modes: (1) direct petrophysical parameters inclusion from both field copies and digital files and (2) by reading and filling data from visual log zoning. The software load ASCII and LAS format files and identifies the logs available, supplying both a header file with additional information about the well and a matrix that depicts the depth in the first column and the logs in the remain ones. The last can be loaded by ProcintLog and checked out for unusual highly noisy and spurious data, which allows a complete data control. Furthermore, each one of the proposed processing modes fits well to any chosen processing sequence, allowing the log interpreter to direct your own necessities into log analysis. To provide a little of perspective, fundamental well-logging principles are stressed by informative icons that can be searched at any time the interpreter need. Calculations such as invasion-corrected resistivity, shale volume, Archie and Simandoux methods for water saturation computations and three types of water resistivity computations are viable. One complete example is performed on both synthetic and real data and results are checked against visual analysis to show the usefulness, rapidness and accuracy of ProcintLog in performing accurate logs analysis.

  6. EMD Method Applied to Identification of Logging Sequence Strata

    NASA Astrophysics Data System (ADS)

    Li, Rui; Zhao, Ni

    2015-10-01

    In this work, we compare Fourier transform, wavelet transform, and empirical mode decomposition (EMD), and point out that EMD method decomposes complex signal into a series of component functions through curves of local mean value. Each of Intrinsic Mode Functions (IMFs - component functions) contains all the information on the original signal. Therefore, it is more suitable for the interface identification of logging sequence strata. Well logging data reflect rich geological information and belong to non-linear and non-stationary signals and EMD method can deal with non-stationary and non-linear signals very well. By selecting sensitive parameters combination that reflects the regional geological structure and lithology, the combined parameter can be decomposed through EMD method to study the correlation and the physical meaning of each intrinsic mode function. Meanwhile, it identifies the stratigraphy and cycle sequence perfectly and provides an effective signal treatment method for sequence interface.

  7. Spotted owls and old growth logging in the pacific northwest.

    PubMed

    Doak, D

    1989-12-01

    Northern Spotted Owls, Strix occidentalis caurina, require large tracts of old-growth conifer forest to survive and reproduce. Much of this forest has been or is being cut by commercial logging operations, with uncertain consequences for the owls. In this paper I present simulation models of owl population change over the next 100 years, as summing a variety of scenarios for habitat destruction and fragmentation. My analysis differs from previous models by incorporating patchy territory distribution and random environmental fluctuations. Fragmented and patchy habitat distributions are common problems for endangered organisms, but they have received little attention from modelers. My results indicate that yearly fluctuations in breeding success have little impact on owl populations, but that spatial structure is quite important and should be considered in planning forest preservation. The simulations suggest that for all reasonable parameter values the proposed US. Forest Service logging plans will lead to the demise of the owls. PMID:21129025

  8. Logging into Kronos, Recording Timestamp and Signing Out

    E-print Network

    Stuart, Steven J.

    Logging into Kronos, Recording Timestamp and Signing Out ­ Employee Navigation #12;2 Logging on Log! #12;6 Other Information · The URL link: ­ Bookmark the link as it is sent (not after you log-in) ­ You can also create a Shortcut on your desktop for easy log-in · If you have questions regarding use

  9. Web Logs in the English Classroom: More Than Just Chat.

    ERIC Educational Resources Information Center

    Richardson, Will

    2003-01-01

    Details the use and appeal of Web logs to enhance classroom discussion and allow for outside involvement in the classroom. Defines a Web log, addresses discussing literature in a Web log, and describes the author's first attempts at using Web-log technology. Presents considerations for using Web logs as part of classroom instruction. (SG)

  10. Recognizing Patterns In Log-Polar Coordinates

    NASA Technical Reports Server (NTRS)

    Weiman, Carl F. R.

    1992-01-01

    Log-Hough transform is basis of improved method for recognition of patterns - particularly, straight lines - in noisy images. Takes advantage of rotational and scale invariance of mapping from Cartesian to log-polar coordinates, and offers economy of representation and computation. Unification of iconic and Hough domains simplifies computations in recognition and eliminates erroneous quantization of slopes attributable to finite spacing of Cartesian coordinate grid of classical Hough transform. Equally efficient recognizing curves. Log-Hough transform more amenable to massively parallel computing architectures than traditional Cartesian Hough transform. "In-place" nature makes it possible to apply local pixel-neighborhood processing.

  11. Nonblocking and orphan free message logging protocols

    NASA Technical Reports Server (NTRS)

    Alvisi, Lorenzo; Hoppe, Bruce; Marzullo, Keith

    1992-01-01

    Currently existing message logging protocols demonstrate a classic pessimistic vs. optimistic tradeoff. We show that the optimistic-pessimistic tradeoff is not inherent to the problem of message logging. We construct a message-logging protocol that has the positive features of both optimistic and pessimistic protocol: our protocol prevents orphans and allows simple failure recovery; however, it requires no blocking in failure-free runs. Furthermore, this protocol does not introduce any additional message overhead as compared to one implemented for a system in which messages may be lost but processes do not crash.

  12. LogCauchy, log-sech and lognormal distributions of species abundances in forest communities

    USGS Publications Warehouse

    Yin, Z.-Y.; Peng, S.-L.; Ren, H.; Guo, Q.; Chen, Z.-H.

    2005-01-01

    Species-abundance (SA) pattern is one of the most fundamental aspects of biological community structure, providing important information regarding species richness, species-area relation and succession. To better describe the SA distribution (SAD) in a community, based on the widely used lognormal (LN) distribution model with exp(-x2) roll-off on Preston's octave scale, this study proposed two additional models, logCauchy (LC) and log-sech (LS), respectively with roll-offs of simple x-2 and e-x. The estimation of the theoretical total number of species in the whole community, S*, including very rare species not yet collected in sample, was derived from the left-truncation of each distribution. We fitted these three models by Levenberg-Marquardt nonlinear regression and measured the model fit to the data using coefficient of determination of regression, parameters' t-test and distribution's Kolmogorov-Smirnov (KS) test. Examining the SA data from six forest communities (five in lower subtropics and one in tropics), we found that: (1) on a log scale, all three models that are bell-shaped and left-truncated statistically adequately fitted the observed SADs, and the LC and LS did better than the LN; (2) from each model and for each community the S* values estimated by the integral and summation methods were almost equal, allowing us to estimate S* using a simple integral formula and to estimate its asymptotic confidence internals by regression of a transformed model containing it; (3) following the order of LC, LS, and LN, the fitted distributions became lower in the peak, less concave in the side, and shorter in the tail, and overall the LC tended to overestimate, the LN tended to underestimate, while the LS was intermediate but slightly tended to underestimate, the observed SADs (particularly the number of common species in the right tail); (4) the six communities had some similar structural properties such as following similar distribution models, having a common modal octave and a similar proportion of common species. We suggested that what follows the LN distribution should follow (or better follow) the LC and LS, and that the LC, LS and LN distributions represent a "sequential distribution set" in which one can find a best fit to the observed SAD. ?? 2004 Elsevier B.V. All rights reserved.

  13. Flowing fluid electric conductivity logging for a deep artesian well in fractured rock with regional flow

    NASA Astrophysics Data System (ADS)

    Doughty, Christine; Tsang, Chin-Fu; Yabuuchi, Satoshi; Kunimaru, Takanori

    2013-03-01

    SummaryThe flowing fluid electric conductivity (FFEC) logging method is a well-logging technique that may be used to estimate flow rate, salinity, transmissivity, and hydraulic head of individual fractures or high-permeability zones intersected by a wellbore. Wellbore fluid is first replaced with fluid of a contrasting electric conductivity, then repeated FEC logging is done while the well is pumped. Zones where fluid flows into the wellbore show peaks in the FEC logs, which may be analyzed to infer inflow rate and salinity of the individual fractures. Conducting the procedure with two or more pumping rates (multi-rate FFEC logging) enables individual fracture transmissivity and hydraulic head to be determined. Here we describe the first application of the multi-rate FFEC logging method to an artesian well, using a 500-m well in fractured rock at Horonobe, Japan. An additional new factor at the site is the presence of regional groundwater flow, which heretofore has only been studied with synthetic data. FFEC logging was conducted for two different pumping rates. Several analysis techniques had to be adapted to account for the artesian nature of the well. The results were subsequently compared with independent salinity measurements and transmissivity and hydraulic head values obtained from packer tests in the same well. Despite non-ideal operating conditions, multi-rate FFEC logging successfully determined flow rate, salinity, and transmissivity of 17 conducting fractures intercepted by the logged section of the borehole, including two fractures with regional groundwater flow. Predictions of hydraulic head were less accurate, a not unexpected result in light of operational problems and the form of the equation for hydraulic head, which involves the difference between two uncertain quantities. This study illustrates the strengths and weaknesses of the multi-rate FFEC logging method applied to artesian wells. In conjunction with previous studies, it demonstrates the usefulness of the method for a broad range of conditions encountered in subsurface fractured rock.

  14. Endpoint Identification Using System Logs Stephen Melvin

    E-print Network

    Melvin, Stephen

    with a MAC address in use, is discussed as well. Introduction It is a usual practice for companies providing of access and activity. Some examples of how logs are used are for debugging and troubleshooting, detection

  15. CMLOG: A common message logging system

    SciTech Connect

    Chen, J.; Akers, W.; Bickley, M.; Wu, D.; Watson, W. III

    1997-12-01

    The Common Message Logging (CMLOG) system is an object-oriented and distributed system that not only allows applications and systems to log data (messages) of any type into a centralized database but also lets applications view incoming messages in real-time or retrieve stored data from the database according to selection rules. It consists of a concurrent Unix server that handles incoming logging or searching messages, a Motif browser that can view incoming messages in real-time or display stored data in the database, a client daemon that buffers and sends logging messages to the server, and libraries that can be used by applications to send data to or retrieve data from the database via the server. This paper presents the design and implementation of the CMLOG system meanwhile it will also address the issue of integration of CMLOG into existing control systems.

  16. Logging-while-coring method and apparatus

    DOEpatents

    Goldberg, David S. (New York, NY); Myers, Gregory J. (Cornwall, NY)

    2007-11-13

    A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wireline and latching tool The core collar includes logging-while-drilling tools for the simultaneous measurement of formation properties during the core excavation process. Examples of logging-while-drilling tools include nuclear sensors, resistivity sensors, gamma ray sensors, and bit resistivity sensors. The disclosed method allows for precise core-log depth calibration and core orientation within a single borehole, and without at pipe trip, providing both time saving and unique scientific advantages.

  17. Formation mechanical properties and the sonic log

    SciTech Connect

    Elphick, R.Y.

    1988-11-01

    A program is presented that calculates the mechanical properties of reservoir rocks from sonic logs. The program was written in Microsoft BASIC and the source code for MS-DOS, Apple Macintosh, and Amiga personal computers is given.

  18. Sisyphus - An Event Log Analysis Toolset

    Energy Science and Technology Software Center (ESTSC)

    2004-09-01

    Event logs are a ubiquitous source of system feedback from computer systems, but have widely ranging format and can be extremely numerous, particularly from systems with many logging components. Inspection of these logs is fundamental to system debugging; increased capability to quickly extract meaningful information will impact MTTR (mean time to repair) and may impact MTBF (mean time between failure). Sisyphus is a machine-leanring analysis system whose goal is to enable content-novice analysts to efficieniiymore »understand evolving trends, identify anomalies, and investigate cause-effect hypotheses in large multiple-souce log sets. The toolkit is comprised a framework for utilizing third-party frequentitemset data mining tools Teiresias and SLCT. and software to cluster messages according to time statistics, and an interactive results viewer.« less

  19. Logging-while-coring method and apparatus

    DOEpatents

    Goldberg, David S.; Myers, Gregory J.

    2007-01-30

    A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wireline and latching tool The core collar includes logging-while-drilling tools for the simultaneous measurement of formation properties during the core excavation process. Examples of logging-while-drilling tools include nuclear sensors, resistivity sensors, gamma ray sensors, and bit resistivity sensors. The disclosed method allows for precise core-log depth calibration and core orientation within a single borehole, and without at pipe trip, providing both time saving and unique scientific advantages.

  20. 55. VIEW OF STEAMOPERATED LOG HOIST TO PUT IN COMING ...

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

    55. VIEW OF STEAM-OPERATED LOG HOIST TO PUT IN COMING LOGS INTO RALPH HULL LUMBER CO. LOG POND. PHOTOGRAPHER: UNKNOWN. DATE: 1942. COURTESY OF RALPH HULL. - Hull-Oakes Lumber Company, 23837 Dawson Road, Monroe, Benton County, OR

  1. 10 CFR 39.13 - Specific licenses for well logging.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...false Specific licenses for well logging. 39.13 Section 39.13 Energy...RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING Specific Licensing Requirements § 39.13 Specific licenses for well logging. The Commission will...

  2. 10 CFR 39.13 - Specific licenses for well logging.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...false Specific licenses for well logging. 39.13 Section 39.13 Energy...RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING Specific Licensing Requirements § 39.13 Specific licenses for well logging. The Commission will...

  3. 10 CFR 39.13 - Specific licenses for well logging.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...false Specific licenses for well logging. 39.13 Section 39.13 Energy...RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING Specific Licensing Requirements § 39.13 Specific licenses for well logging. The Commission will...

  4. 5. Log calving barn. Detail of wall corner showing half ...

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

    5. Log calving barn. Detail of wall corner showing half dovetail notching on hand-hewn logs. - William & Lucina Bowe Ranch, Log Calving Barn, 230 feet south-southwest of House, Melrose, Silver Bow County, MT

  5. 10 CFR 39.13 - Specific licenses for well logging.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...false Specific licenses for well logging. 39.13 Section 39.13 Energy...RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING Specific Licensing Requirements § 39.13 Specific licenses for well logging. The Commission will...

  6. 10 CFR 39.13 - Specific licenses for well logging.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...false Specific licenses for well logging. 39.13 Section 39.13 Energy...RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING Specific Licensing Requirements § 39.13 Specific licenses for well logging. The Commission will...

  7. DOE/Simplec magnetic susceptibility logging system

    SciTech Connect

    Emilia, D.A.; Allen, J.W.; Chessmore, R.B.; Wilson, R.B.

    1981-03-01

    A magnetic susceptibility logging system has been developed which is relatively stable under normal field logging conditions and which produces logs that accurately represent in situ variations in magnetic susceptibility. However, both field and laboratory tests indicate the need for further improvement of temperature stabilization and bridge compensation; a new generation system designed by Simplec may fill that need. A cubic granite block with a magnetic susceptibility of 385 ..mu..CGS is designated as the primary calibration standard and is available for public use at the DOE facility in Grand Junction, Colorado. Models are also available for characterization of magnetic susceptibility systems. These include models to provide borehole size correction factors, thin layer interpretation parameters, reproducibility limits, longitudinal resolution, and radius of investigation. The DOE/Simplec system has a 99-percent radius of investigation, approximately equal to the coil length (15 inches), and a 99-percent thickness of investigation, approximately equal to two coil lengths. The true magnetic susceptibility and thickness of isolated layers less than two coil lengths in thickness can be obtained through use of parameters measured from their log responses. Field tests show that the system has a reproducibility of at least 5 ..mu..CGS and that logging at 25 ft/min is a good compromise between speed of operation and keeping the probe on the sidewall. Comparison of log and core magnetic susceptibility measurements confirms the fact that the logging system samples a rather large volume and that interpretive aids are necessary to unfold the true variation of magnetic susceptibility with depth. Finally, logs from known uranium-favorable environments show that magnetic susceptibility measurements can give an indication of the degree of geochemical alteration, which is one of the uranium-favorable haloes sought by exploration geologists.

  8. Selective Logging, Fire, and Biomass in Amazonia

    NASA Technical Reports Server (NTRS)

    Houghton, R. A.

    1999-01-01

    Biomass and rates of disturbance are major factors in determining the net flux of carbon between terrestrial ecosystems and the atmosphere, and neither of them is well known for most of the earth's surface. Satellite data over large areas are beginning to be used systematically to measure rates of two of the most important types of disturbance, deforestation and reforestation, but these are not the only types of disturbance that affect carbon storage. Other examples include selective logging and fire. In northern mid-latitude forests, logging and subsequent regrowth of forests have, in recent decades, contributed more to the net flux of carbon between terrestrial ecosystems and the atmosphere than any other type of land use. In the tropics logging is also becoming increasingly important. According to the FAO/UNEP assessment of tropical forests, about 25% of total area of productive forests have been logged one or more times in the 60-80 years before 1980. The fraction must be considerably greater at present. Thus, deforestation by itself accounts for only a portion of the emissions carbon from land. Furthermore, as rates of deforestation become more accurately measured with satellites, uncertainty in biomass will become the major factor accounting for the remaining uncertainty in estimates of carbon flux. An approach is needed for determining the biomass of terrestrial ecosystems. 3 Selective logging is increasingly important in Amazonia, yet it has not been included in region-wide, satellite-based assessments of land-cover change, in part because it is not as striking as deforestation. Nevertheless, logging affects terrestrial carbon storage both directly and indirectly. Besides the losses of carbon directly associated with selective logging, logging also increases the likelihood of fire.

  9. Estimating xenobiotic half-lives in humans from rat data: influence of log P.

    PubMed Central

    Sarver, J G; White, D; Erhardt, P; Bachmann, K

    1997-01-01

    The nature of empirical allometric expressions relating dispositional and kinetic parameters for a given xenobiotic across multiple mammalian species is well known. It has also been demonstrated that a simple allometric relationship may be used to predict kinetic parameters for humans based merely on data for multiple xenobiotics from rats. We decided to explore reasons for the variance in the data arising from the latter method. We were particularly interested in learning whether any physicochemical characteristics of xenobiotics might account for outlying data points (i.e., poor prediction of human half-life from rat half-life). We have explored the influence of lipid solubility as reflected by a xenobiotic's log P value because adipose tissue comprises a significantly larger percentage of total body weight in humans than in rats. We used half-life data from the literature for 127 xenobiotics. A data subset of 102 xenobiotics for which we were able to find estimates of log P values, including several with extremely large log P values, was also analyzed. First and second order models, including and excluding log P, were compared. The simplest of these models can be recast as the familiar allometric relationship having the form Y = a(Xb). The remaining models can be seen as extensions of this relationship. Our results suggest that incorporation of log P into the prediction of xenobiotic half-life in humans from rat half-life data is important only for xenobiotics with extremely large log P values such as dioxins and polychlorinated biphenyls. Moreover, a second order model in logarithm of rat half-life accommodates all data points very well, without specifically accounting for log P values. Images Figure 1. Figure 2. Figure 3. A Figure 3. B Figure 3. C Figure 3. D Figure 4. PMID:9370523

  10. LogDet Rank Minimization with Application to Subspace Clustering.

    PubMed

    Kang, Zhao; Peng, Chong; Cheng, Jie; Cheng, Qiang

    2015-01-01

    Low-rank matrix is desired in many machine learning and computer vision problems. Most of the recent studies use the nuclear norm as a convex surrogate of the rank operator. However, all singular values are simply added together by the nuclear norm, and thus the rank may not be well approximated in practical problems. In this paper, we propose using a log-determinant (LogDet) function as a smooth and closer, though nonconvex, approximation to rank for obtaining a low-rank representation in subspace clustering. Augmented Lagrange multipliers strategy is applied to iteratively optimize the LogDet-based nonconvex objective function on potentially large-scale data. By making use of the angular information of principal directions of the resultant low-rank representation, an affinity graph matrix is constructed for spectral clustering. Experimental results on motion segmentation and face clustering data demonstrate that the proposed method often outperforms state-of-the-art subspace clustering algorithms. PMID:26229527

  11. LogDet Rank Minimization with Application to Subspace Clustering

    PubMed Central

    Kang, Zhao; Peng, Chong; Cheng, Jie; Cheng, Qiang

    2015-01-01

    Low-rank matrix is desired in many machine learning and computer vision problems. Most of the recent studies use the nuclear norm as a convex surrogate of the rank operator. However, all singular values are simply added together by the nuclear norm, and thus the rank may not be well approximated in practical problems. In this paper, we propose using a log-determinant (LogDet) function as a smooth and closer, though nonconvex, approximation to rank for obtaining a low-rank representation in subspace clustering. Augmented Lagrange multipliers strategy is applied to iteratively optimize the LogDet-based nonconvex objective function on potentially large-scale data. By making use of the angular information of principal directions of the resultant low-rank representation, an affinity graph matrix is constructed for spectral clustering. Experimental results on motion segmentation and face clustering data demonstrate that the proposed method often outperforms state-of-the-art subspace clustering algorithms. PMID:26229527

  12. Well log characterization of natural gas hydrates

    USGS Publications Warehouse

    Collett, Timothy S.; Lee, Myung W.

    2011-01-01

    In the last 25 years we have seen significant advancements in the use of downhole well logging tools to acquire detailed information on the occurrence of gas hydrate in nature: From an early start of using wireline electrical resistivity and acoustic logs to identify gas hydrate occurrences in wells drilled in Arctic permafrost environments to today where wireline and advanced logging-while-drilling tools are routinely used to examine the petrophysical nature of gas hydrate reservoirs and the distribution and concentration of gas hydrates within various complex reservoir systems. The most established and well known use of downhole log data in gas hydrate research is the use of electrical resistivity and acoustic velocity data (both compressional- and shear-wave data) to make estimates of gas hydrate content (i.e., reservoir saturations) in various sediment types and geologic settings. New downhole logging tools designed to make directionally oriented acoustic and propagation resistivity log measurements have provided the data needed to analyze the acoustic and electrical anisotropic properties of both highly inter-bedded and fracture dominated gas hydrate reservoirs. Advancements in nuclear-magnetic-resonance (NMR) logging and wireline formation testing have also allowed for the characterization of gas hydrate at the pore scale. Integrated NMR and formation testing studies from northern Canada and Alaska have yielded valuable insight into how gas hydrates are physically distributed in sediments and the occurrence and nature of pore fluids (i.e., free-water along with clay and capillary bound water) in gas-hydrate-bearing reservoirs. Information on the distribution of gas hydrate at the pore scale has provided invaluable insight on the mechanisms controlling the formation and occurrence of gas hydrate in nature along with data on gas hydrate reservoir properties (i.e., permeabilities) needed to accurately predict gas production rates for various gas hydrate production schemes.

  13. Applications of geothermal well log data for evaluation of reservoir potential

    SciTech Connect

    Rigby, F.A.

    1981-03-01

    A great many geothermal reservoirs are naturally fractured stems with porosity supplied by both the macroscopic fracture system and by dispersed intergranular or vuggy porosity. Flow properties, the use of log data for well test interpretation in such systems, and the log derivable parameters that may be of most value for evaluation are discussed here. Parameters for describing behavior of two-phase geothermal systems are also mentioned. Determination of reservoir dimensions is another important problem aggravated in geothermal resource evaluation by our limited knowledge of the geophysics of geothermal systems. The use of resistivity log data to deduce constraints on the inversion of surface resistivity data is examined. Potentially valuable applications of resistivity log data in deducing reservoir dimensions and reaching decisions on exploratory drilling are indicated.

  14. Infinite log-concavity: developments and conjectures

    E-print Network

    McNamara, Peter R W

    2008-01-01

    Given a sequence (a_k) = a_0, a_1, a_2,... of real numbers, define a new sequence L(a_k) = (b_k) where b_k = a_k^2 - a_{k-1} a_{k+1}. So (a_k) is log-concave if and only if (b_k) is a nonnegative sequence. Call (a_k) "infinitely log-concave" if L^i(a_k) is nonnegative for all i >= 1. Boros and Moll conjectured that the rows of Pascal's triangle are infinitely log-concave. Using a computer and a stronger version of log-concavity, we prove their conjecture for the nth row for all n <= 1450. We also use our methods to give a simple proof of a recent result of Uminsky and Yeats about regions of infinite log-concavity. We investigate related questions about the columns of Pascal's triangle, q-analogues, symmetric functions, real-rooted polynomials, and Toeplitz matrices. In addition, we offer several conjectures.

  15. Logjam: A scalable unified log file archiver

    Energy Science and Technology Software Center (ESTSC)

    2001-08-01

    Log files are a necessary record of events on any system. However, as systems scale, so does the volume of data captured. To complicate matters, this data can be distributed across all nodes within the system. This creates challenges in ways to obtain these files as well as archiving them in a consistent manner. It has become commonplace to develop a custom written utility for each system that is tailored specifically to that system. Formore »computer centers that contain multiple systems, each system would have their own respective utility for gathering and archiving log files. Each time a new log file is produced, a modification to the utility is necessary. With each modification, risks of errors could be introduced as well as spending time to introduce that change. This is precisely the purpose of logjam. Once installed, the code only requires modification when new features are required. A configuration file is used to identify each log file as well as where to harvest it and how to archive it. Adding a new log file is as simple as defining it in a configuration file and testing can be performed in the production environment.« less

  16. Combating Illegal LoggingCombating Illegal Logging in Russia:in Russia

    E-print Network

    Combating Illegal LoggingCombating Illegal Logging in Russia:in Russia: Case study ofCase study of PrimorskyPrimorsky RegionRegion AlexeyAlexey MorozovMorozov Greenpeace RussiaGreenpeace Russia http://www region: 2000 #12;RUSSIA Official Responses 7 of July 2000 Head of Nature Resource Committee

  17. Combating Illegal LoggingCombating Illegal Logging in Russia:in Russia

    E-print Network

    Combating Illegal LoggingCombating Illegal Logging in Russia:in Russia: Case study ofCase study of PrimorskyPrimorsky RegionRegion AlexeyAlexey MorozovMorozov Greenpeace RussiaGreenpeace Russia #12;Primorsky #12;RUSSIA Official Responses 7 of July 2000 Head of Nature Resource Committee of the Primorsky

  18. Lithologic logs and geophysical logs from test drilling in Palm Beach County, Florida, since 1974

    USGS Publications Warehouse

    Swayze, Leo J.; McGovern, Michael C.; Fischer, John N.

    1980-01-01

    Test-hole data that may be used to determine the hydrogeology of the zone of high permeability in Palm Beach County, Fla., are presented. Lithologic logs from 46 test wells and geophysical logs from 40 test wells are contained in this report. (USGS)

  19. Mutual Exclusion with O(log 2 log n) Amortized Work Michael A. Bender

    E-print Network

    Bender, Michael

    Mutual Exclusion with O(log 2 log n) Amortized Work Michael A. Bender Stony Brook University.gilbert@comp.nus.edu.sg Abstract--- This paper presents a new algorithm for mutual exclusion in which each passage through performance by exploiting a connection between mutual exclusion and approximate counting. 1. INTRODUCTION

  20. Mutual Exclusion with O(log2 log n) Amortized Work

    E-print Network

    Bender, Michael

    Mutual Exclusion with O(log2 log n) Amortized Work Michael A. Bender Stony Brook University.gilbert@comp.nus.edu.sg Abstract-- This paper presents a new algorithm for mutual exclusion in which each passage through performance by exploiting a connection between mutual exclusion and approximate counting. 1. INTRODUCTION

  1. LogSafe and Smart: Minnesota OSHA's LogSafe Program Takes Root.

    ERIC Educational Resources Information Center

    Honerman, James

    1999-01-01

    Logging is now the most dangerous U.S. occupation. The Occupational Safety and Health Administration (OSHA) developed specialized safety training for the logging industry but has been challenged to reach small operators. An OSHA-approved state program in Minnesota provides annual safety seminars to about two-thirds of the state's full-time…

  2. Unconventional neutron sources for oil well logging

    NASA Astrophysics Data System (ADS)

    Frankle, C. M.; Dale, G. E.

    2013-09-01

    Americium-Beryllium (AmBe) radiological neutron sources have been widely used in the petroleum industry for well logging purposes. There is strong desire on the part of various governmental and regulatory bodies to find alternate sources due to the high activity and small size of AmBe sources. Other neutron sources are available, both radiological (252Cf) and electronic accelerator driven (D-D and D-T). All of these, however, have substantially different neutron energy spectra from AmBe and thus cause significantly different responses in well logging tools. We report on simulations performed using unconventional sources and techniques to attempt to better replicate the porosity and carbon/oxygen ratio responses a well logging tool would see from AmBe neutrons. The AmBe response of these two types of tools is compared to the response from 252Cf, D-D, D-T, filtered D-T, and T-T sources.

  3. Nearly optimal distributed edge colouring in O(log log n) rounds

    SciTech Connect

    Grable, D.A.; Panconesi, A.

    1997-06-01

    An extremely simple distributed randomized edge colouring algorithm is given which produces with high probability a proper edge colouring of a given graph G using (1 + {epsilon}){Delta} (G) colours, for any {epsilon} > 0. The algorithm is very fast. In particular, for graphs with sufficiently large vertex degrees (larger than polylog n, but smaller than any positive power of n), the algorithm requires only O(log log n) communication rounds. The algorithm is inherently distributed, but can be implemented on the PRAM, where it requires O(m{Delta}) processors and O(log {Delta} log log n) time, or in a sequential setting, where it requires O(m{Delta}) time.

  4. 1. GENERAL VIEW OF LOG POND AND BOOM FOR UNLOADING ...

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

    1. GENERAL VIEW OF LOG POND AND BOOM FOR UNLOADING CEDAR LOGS FROM TRUCKS AT LOG DUMP, ADJACENT TO MILL; TRUCKS FORMERLY USED TRIP STAKES, THOUGH FOR SAFER HANDLING OF LOGS WELDED STAKES ARE NOW REQUIRED; AS A RESULT LOADING IS NOW DONE WITH A CRANE - Lester Shingle Mill, 1602 North Eighteenth Street, Sweet Home, Linn County, OR

  5. Privacy-Preserving Transparency Logging Using Balloons Tobias Pulls

    E-print Network

    International Association for Cryptologic Research (IACR)

    Insynd Privacy-Preserving Transparency Logging Using Balloons Tobias Pulls Dept. of Mathematics.peeters@esat.kuleuven.be ABSTRACT Insynd is a cryptographic scheme for privacy-preserving transparency logging. In the setting of transparency log- ging, a service provider continuously logs descriptions of its data processing on its users

  6. ADL Logging Architecture JIGI determines all server addresses from

    E-print Network

    Janée, Greg

    ADL Logging Architecture JIGI logging server JIGI determines all server addresses from configuration file (HTTP) JIGI logs records that reflect user actions in the context of a session The data logged includes a universally unique session identifier (created by JIGI) and a user identifier (obtained

  7. Upland Log Volumes and Conifer Establishment Patterns in Two Northern,

    E-print Network

    Upland Log Volumes and Conifer Establishment Patterns in Two Northern, Upland Old-Growth Redwood conifer recruit densities on these logs and on the surrounding forest floor. We report significantly greater conifer recruit densities on log substrates as compared to the forest floor. Log substrate

  8. Vol. 43, No. 2 August 1999 Mariners Weather Log

    E-print Network

    Vol. 43, No. 2 August 1999 Mariners Weather Log Sea Surface Temperature image of the North Atlantic of satellites, a view of ocean currents can be seen on a daily basis. #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log U.S. Department of Commerce William M. Daley

  9. Vol. 43, No. 3 December 1999 Mariners Weather Log

    E-print Network

    Vol. 43, No. 3 December 1999 Mariners Weather Log Double eyewall structure of hurricane Gilbert in knots). See article on page 4. #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log U.S. Department of Commerce William M. Daley, Secretary National Oceanic

  10. Vol. 45, No. 1 April 2001 Mariners Weather Log

    E-print Network

    Vol. 45, No. 1 April 2001 Mariners Weather Log A Fresh Breeze in the West Wind Belt In: The South by Mr. Steve Nicklas, NOS, NGS #12;2 Mariners Weather Log From the National Data Buoy Center Mariners Weather Log Mariners Weather Log U.S. DEPARTMENT OF COMMERCE Donald L. Evans, Secretary National Oceanic

  11. Vol. 43, No. 1 April 1999 Mariners Weather Log

    E-print Network

    Vol. 43, No. 1 April 1999 Mariners Weather Log Hurricane Mitch, one of the deadliest Atlantic;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log U. James Baker, Administrator National Weather Service John J. Kelly, Jr., Assistant Administrator

  12. Vol. 42, No. 2 August 1998 Mariners Weather Log

    E-print Network

    Vol. 42, No. 2 August 1998 Mariners Weather Log Supertyphoon Tip on October 12, 1979, as it set. Photo courtesy of Debi Iacovelli. #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log Editorial Supervisor Martin S. Baron Editor Mary Ann Burke U

  13. Vol. 44, No. 2 August 2000 Mariners Weather Log

    E-print Network

    Vol. 44, No. 2 August 2000 Mariners Weather Log The Jay Gould sank on June 17, 1918, near Southeast steamboats. (See article on page 13.) Photo: Milwaukee Public Library. #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log U.S. Department of Commerce Norman Y. Mineta

  14. Vol. 44, No. 3 December 2000 Mariners Weather Log

    E-print Network

    Vol. 44, No. 3 December 2000 Mariners Weather Log Giant rogue wave as seen from the bridge wing://www.ifremer.fr/metocean/conferences/freak/_waves.htm. Courtesy Captain Andy Chase, Maine Maritime Academy #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Log U.S. Department of Commerce Norman Y. Mineta, Secretary

  15. Mariners Weather Log Vol. 45, No. 2 August 2001

    E-print Network

    Mariners Weather Log Vol. 45, No. 2 August 2001 U.S. Coast Guard Women's Rescue or SPARS Recruiting of the Mariners Museum, Newport News, VA. #12;Mariners Weather Log Mariners Weather Log, August 20012 Mariners Weather Log U.S. DEPARTMENT OF COMMERCE Donald L. Evans, Secretary National Oceanic and Atmospheric

  16. Log-optimal configurations on the sphere

    E-print Network

    P. D. Dragnev

    2015-04-10

    In this article we consider the distribution of $N$ points on the unit sphere $\\mathbb{S}^{d-1}$ in $\\mathbb{R}^d$ interacting via logarithmic potential. A characterization theorem of the stationary configurations is derived when $N=d+2$ and two new log-optimal configurations minimizing the logarithmic energy are obtained for six points on $\\mathbb{S}^3$ and seven points on $\\mathbb{S}^4$. A conjecture on the log-optimal configurations of $d+2$ points on $\\mathbb{S}^{d-1}$ is stated and three auxiliary results supporting the conjecture are presented.

  17. Development of pulsed neutron uranium logging instrument

    SciTech Connect

    Wang, Xin-guang; Liu, Dan; Zhang, Feng

    2015-03-15

    This article introduces a development of pulsed neutron uranium logging instrument. By analyzing the temporal distribution of epithermal neutrons generated from the thermal fission of {sup 235}U, we propose a new method with a uranium-bearing index to calculate the uranium content in the formation. An instrument employing a D-T neutron generator and two epithermal neutron detectors has been developed. The logging response is studied using Monte Carlo simulation and experiments in calibration wells. The simulation and experimental results show that the uranium-bearing index is linearly correlated with the uranium content, and the porosity and thermal neutron lifetime of the formation can be acquired simultaneously.

  18. Permeability extraction: A sonic log inversion

    SciTech Connect

    Akbar, N.; Kim, J.J.

    1994-12-31

    In this paper the authors provide the missing important link between permeability and acoustic velocities by generating a permeability-dependent synthetic sonic log in a carbonate reservoir. The computations are based on Akbar`s theory that relates wave velocity to frequency, rock properties (e.g., lithology, permeability, and porosity), and fluid saturation and properties (viscosity, density, and compressibility). An inverted analytical expression of the theory is used to extract permeability from sonic velocity. The synthetic sonic and the computed permeability are compared with the observed sonic log and with plug permeability, respectively. The results demonstrate, as predicted by theory, that permeability can be related directly to acoustic velocities.

  19. Modelling tropical forests response to logging

    NASA Astrophysics Data System (ADS)

    Cazzolla Gatti, Roberto; Di Paola, Arianna; Valentini, Riccardo; Paparella, Francesco

    2013-04-01

    Tropical rainforests are among the most threatened ecosystems by large-scale fragmentation due to human activity such as heavy logging and agricultural clearance. Although, they provide crucial ecosystem goods and services, such as sequestering carbon from the atmosphere, protecting watersheds and conserving biodiversity. In several countries forest resource extraction has experienced a shift from clearcutting to selective logging to maintain a significant forest cover and understock of living biomass. However the knowledge on the short and long-term effects of removing selected species in tropical rainforest are scarce and need to be further investigated. One of the main effects of selective logging on forest dynamics seems to be the local disturbance which involve the invasion of open space by weed, vines and climbers at the expense of the late-successional state cenosis. We present a simple deterministic model that describes the dynamics of tropical rainforest subject to selective logging to understand how and why weeds displace native species. We argue that the selective removal of tallest tropical trees carries out gaps of light that allow weeds, vines and climbers to prevail on native species, inhibiting the possibility of recovery of the original vegetation. Our results show that different regime shifts may occur depending on the type of forest management adopted. This hypothesis is supported by a dataset of trees height and weed/vines cover that we collected from 9 plots located in Central and West Africa both in untouched and managed areas.

  20. Elemental concentration logging with a germanium spectrometer

    SciTech Connect

    Peterson, C.A.; Schweitzer, J.S. ); Draxler, J.K.

    1991-11-01

    The German deep-well project is currently drilling a scientific well in northeastern Bavaria at the intersection of the African and Northern European tectonic plates. This well is scheduled to be drilled to a depth of {approximately}10 km to study the geochemical processes involved in the alteration of minerals under high temperature and pressure. As an initial stage in this project, a well was drilled to a depth of 4 km within 200 m of the site selected for the deep well. This well was fully cored and extensively logged with both commercial and experimental logging systems. Cores, as well as cuttings and fluids, were extensively analyzed in a well-site laboratory established specifically for that purpose. One of the experimental logging systems run in the 4-km well was a gamma-ray spectrometer that used a {sup 252}Cf source for delayed activation measurements and a neutron generator that produces 14-MeV neutrons for thermal neutron-capture gamma-ray measurements. There were two primary goals of this project. The first was to confirm the validity of elemental concentration determinations from commercial logging equipment, based on NaI(Tl) detectors, in this crystalline rock environment. The commercial equipment determines the elements: aluminum, silicon, sulfur, calcium, titanium, iron, gadolinium, potassium, thorium, and uranium. The second was to determine additional elemental concentrations that can be used to enhance the geo-chemical studies of the crystalline rock mineralogy.

  1. There's Life in Those Dead Logs!

    ERIC Educational Resources Information Center

    Biggs, Devin; Miller, Todd; Hall, Dee

    2006-01-01

    Although it is unspectacular in appearance, dead wood is one of the most ecologically important resources in forests. Fallen logs, dead standing trees, stumps, and even cavities in live trees fulfill a wide range of roles. Prominent among these is that they provide habitat for many organisms, especially insects. Fourth-grade students at Fox…

  2. 29 CFR 1910.266 - Logging operations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... delivery, such as, but not limited to, marking danger trees and trees/logs to be cut to length, felling... rotating work platform meeting the requirements of 29 CFR 1910.68. (v) The employer shall assure that each... operations near overhead electric lines shall be done in accordance with the requirements of 29 CFR...

  3. 29 CFR 1910.266 - Logging operations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... delivery, such as, but not limited to, marking danger trees and trees/logs to be cut to length, felling... rotating work platform meeting the requirements of 29 CFR 1910.67. (v) The employer shall assure that each... operations near overhead electric lines shall be done in accordance with the requirements of 29 CFR...

  4. 29 CFR 1910.266 - Logging operations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... delivery, such as, but not limited to, marking danger trees and trees/logs to be cut to length, felling... rotating work platform meeting the requirements of 29 CFR 1910.68. (v) The employer shall assure that each... operations near overhead electric lines shall be done in accordance with the requirements of 29 CFR...

  5. Gentle Logging System Evaluation (PARTICIPANTS' QUESTIONNAIRE REPORT)

    E-print Network

    2 of 12 The title of this project is Improving Environmental Quality by Identifying, Demonstrating to evaluate the harvesting systems as they carried out a thinning in our test stand. Participants shared was not a problem. Logging company owners and equipment operators tended to feel that they could do an equally good

  6. MAIL LOG, program theory, volume 2

    NASA Technical Reports Server (NTRS)

    Harris, D. K.

    1979-01-01

    Information relevant to the MAIL LOG program theory is documented. The L-files for mail correspondence, design information release/report, and the drawing/engineering order are given. In addition, sources for miscellaneous external routines and special support routines are documented along with a glossary of terms.

  7. USGS Training on Borehole Geophysical Logging

    USGS Multimedia Gallery

    A USGS hydrologist holds an electromagnetic induction borehole logging tool while the tool is calibrated. The hydrologist was participating in a USGS class on how to use electromagnetic induction geophysical methods for groundwater investigations, conducted by the USGS Office of Groundwater Branch o...

  8. High temperature spectral gamma well logging

    SciTech Connect

    Normann, R.A.; Henfling, J.A.

    1997-01-01

    A high temperature spectral gamma tool has been designed and built for use in small-diameter geothermal exploration wells. Several engineering judgments are discussed regarding operating parameters, well model selection, and signal processing. An actual well log at elevated temperatures is given with spectral gamma reading showing repeatability.

  9. Land-sharing versus land-sparing logging: reconciling timber extraction with biodiversity conservation.

    PubMed

    Edwards, David P; Gilroy, James J; Woodcock, Paul; Edwards, Felicity A; Larsen, Trond H; Andrews, David J R; Derhé, Mia A; Docherty, Teegan D S; Hsu, Wayne W; Mitchell, Simon L; Ota, Takahiro; Williams, Leah J; Laurance, William F; Hamer, Keith C; Wilcove, David S

    2014-01-01

    Selective logging is a major driver of rainforest degradation across the tropics. Two competing logging strategies are proposed to meet timber demands with the least impact on biodiversity: land sharing, which combines timber extraction with biodiversity protection across the concession; and land sparing, in which higher intensity logging is combined with the protection of intact primary forest reserves. We evaluate these strategies by comparing the abundances and species richness of birds, dung beetles and ants in Borneo, using a protocol that allows us to control for both timber yield and net profit across strategies. Within each taxonomic group, more species had higher abundances with land-sparing than land-sharing logging, and this translated into significantly higher species richness within land-sparing concessions. Our results are similar when focusing only on species found in primary forest and restricted in range to Sundaland, and they are independent of the scale of sampling. For each taxonomic group, land-sparing logging was the most promising strategy for maximizing the biological value of logging operations. PMID:23955803

  10. On log flat descent Luc Illusie, Chikara Nakayama, and Takeshi Tsuji

    E-print Network

    Illusie, Luc

    On log flat descent Luc Illusie, Chikara Nakayama, and Takeshi Tsuji Abstract We prove the log flat descent of log ´etaleness, log smoothness, and log flatness for log schemes. Contents §1. Review of log of the following results, which were announced by K. Kato in [4]. Theorem 0.1. Let f : X Y be a morphism of fs log

  11. Computation of porosity and water content from geophysical logs, Yucca Mountain, Nevada

    SciTech Connect

    Nelson, P.H.

    1996-12-31

    Neutron and density logs acquired in boreholes at Yucca Mountain, Nevada are used to determine porosity and water content as a function of depth. Computation of porosity requires an estimate of grain density, which is provided by core data, mineralogical data, or is inferred from rock type where neither core nor mineralogy are available. The porosity estimate is merged with mineralogical data acquired by X-ray diffraction to compute the volumetric fractions of major mineral groups. The resulting depth-based portrayal of bulk rock composition is equivalent to a whole rock analysis of mineralogy and porosity. Water content is computed from epithermal and thermal neutron logs. In the unsaturated zone, the density log is required along with a neutron log. Water content can also be computed from dielectric logs, which were acquired in only a fraction of the boreholes, whereas neutron logs were acquired in all boreholes. Mineralogical data are used to compute a structural (or bound) water estimate, which is subtracted from the total water estimate from the neutron-density combination. Structural water can be subtracted only from intervals where mineralogical analyses are available; otherwise only total water can be reported. The algorithms and procedures are applied to logs acquired during 1979 to 1984 at Yucca Mountain. Examples illustrate the results. Comparison between computed porosity and core measurements shows systematic differences ranging from 0.005 to 0.04. These values are consistent with a sensitivity analysis using uncertainty parameters for good logging conditions. Water content from core measurements is available in only one borehole, yielding a difference between computed and core-based water content of 0.006.

  12. Logging while tripping cuts time to run gamma ray

    SciTech Connect

    1996-06-10

    A new logging tool, sent down the drillstring before a pipe trip out of the hole, logs the well as the pipe is pulled from the hole, cutting the total time required for open hole logging on some wells. This logging while tripping (LWT) technology allows an operator to run a gamma ray and neutron log more quickly than with standard wire line equipment. The drill pipe conveys the logging tools up the well as the pipe is tripped out, and the logging data are stored in the tool`s memory. A transparent logging collar, which meets API 7 and RP7G requirements, holds the tools in the drillstring without interfering with the logging measurements.

  13. Nut Production in Bertholletia excelsa across a Logged Forest Mosaic: Implications for Multiple Forest Use.

    PubMed

    Rockwell, Cara A; Guariguata, Manuel R; Menton, Mary; Arroyo Quispe, Eriks; Quaedvlieg, Julia; Warren-Thomas, Eleanor; Fernandez Silva, Harol; Jurado Rojas, Edwin Eduardo; Kohagura Arrunátegui, José Andrés Hideki; Meza Vega, Luis Alberto; Revilla Vera, Olivia; Quenta Hancco, Roger; Valera Tito, Jonatan Frank; Villarroel Panduro, Betxy Tabita; Yucra Salas, Juan José

    2015-01-01

    Although many examples of multiple-use forest management may be found in tropical smallholder systems, few studies provide empirical support for the integration of selective timber harvesting with non-timber forest product (NTFP) extraction. Brazil nut (Bertholletia excelsa, Lecythidaceae) is one of the world's most economically-important NTFP species extracted almost entirely from natural forests across the Amazon Basin. An obligate out-crosser, Brazil nut flowers are pollinated by large-bodied bees, a process resulting in a hard round fruit that takes up to 14 months to mature. As many smallholders turn to the financial security provided by timber, Brazil nut fruits are increasingly being harvested in logged forests. We tested the influence of tree and stand-level covariates (distance to nearest cut stump and local logging intensity) on total nut production at the individual tree level in five recently logged Brazil nut concessions covering about 4000 ha of forest in Madre de Dios, Peru. Our field team accompanied Brazil nut harvesters during the traditional harvest period (January-April 2012 and January-April 2013) in order to collect data on fruit production. Three hundred and ninety-nine (approximately 80%) of the 499 trees included in this study were at least 100 m from the nearest cut stump, suggesting that concessionaires avoid logging near adult Brazil nut trees. Yet even for those trees on the edge of logging gaps, distance to nearest cut stump and local logging intensity did not have a statistically significant influence on Brazil nut production at the applied logging intensities (typically 1-2 timber trees removed per ha). In one concession where at least 4 trees ha-1 were removed, however, the logging intensity covariate resulted in a marginally significant (0.09) P value, highlighting a potential risk for a drop in nut production at higher intensities. While we do not suggest that logging activities should be completely avoided in Brazil nut rich forests, when a buffer zone cannot be observed, low logging intensities should be implemented. The sustainability of this integrated management system will ultimately depend on a complex series of socioeconomic and ecological interactions. Yet we submit that our study provides an important initial step in understanding the compatibility of timber harvesting with a high value NTFP, potentially allowing for diversification of forest use strategies in Amazonian Perù. PMID:26271042

  14. Nut Production in Bertholletia excelsa across a Logged Forest Mosaic: Implications for Multiple Forest Use

    PubMed Central

    Rockwell, Cara A.; Guariguata, Manuel R.; Menton, Mary; Arroyo Quispe, Eriks; Quaedvlieg, Julia; Warren-Thomas, Eleanor; Fernandez Silva, Harol; Jurado Rojas, Edwin Eduardo; Kohagura Arrunátegui, José Andrés Hideki; Meza Vega, Luis Alberto; Revilla Vera, Olivia; Valera Tito, Jonatan Frank; Villarroel Panduro, Betxy Tabita; Yucra Salas, Juan José

    2015-01-01

    Although many examples of multiple-use forest management may be found in tropical smallholder systems, few studies provide empirical support for the integration of selective timber harvesting with non-timber forest product (NTFP) extraction. Brazil nut (Bertholletia excelsa, Lecythidaceae) is one of the world’s most economically-important NTFP species extracted almost entirely from natural forests across the Amazon Basin. An obligate out-crosser, Brazil nut flowers are pollinated by large-bodied bees, a process resulting in a hard round fruit that takes up to 14 months to mature. As many smallholders turn to the financial security provided by timber, Brazil nut fruits are increasingly being harvested in logged forests. We tested the influence of tree and stand-level covariates (distance to nearest cut stump and local logging intensity) on total nut production at the individual tree level in five recently logged Brazil nut concessions covering about 4000 ha of forest in Madre de Dios, Peru. Our field team accompanied Brazil nut harvesters during the traditional harvest period (January-April 2012 and January-April 2013) in order to collect data on fruit production. Three hundred and ninety-nine (approximately 80%) of the 499 trees included in this study were at least 100 m from the nearest cut stump, suggesting that concessionaires avoid logging near adult Brazil nut trees. Yet even for those trees on the edge of logging gaps, distance to nearest cut stump and local logging intensity did not have a statistically significant influence on Brazil nut production at the applied logging intensities (typically 1–2 timber trees removed per ha). In one concession where at least 4 trees ha-1 were removed, however, the logging intensity covariate resulted in a marginally significant (0.09) P value, highlighting a potential risk for a drop in nut production at higher intensities. While we do not suggest that logging activities should be completely avoided in Brazil nut rich forests, when a buffer zone cannot be observed, low logging intensities should be implemented. The sustainability of this integrated management system will ultimately depend on a complex series of socioeconomic and ecological interactions. Yet we submit that our study provides an important initial step in understanding the compatibility of timber harvesting with a high value NTFP, potentially allowing for diversification of forest use strategies in Amazonian Perù. PMID:26271042

  15. Selecting Aquifer Wells for Planned Gyroscopic Logging

    SciTech Connect

    Rohe, Michael James; Studley, Gregory Wayne

    2002-04-01

    Understanding the configuration of the eastern Snake River Plain aquifer's water table is made difficult, in part, due to borehole deviation in aquifer wells. A borehole has deviation if it is not vertical or straight. Deviation impairs the analysis of water table elevation measurements because it results in measurements that are greater than the true distance from the top of the well to the water table. Conceptual models of the water table configuration are important to environmental management decision-making at the INEEL; these models are based on measurements of depth to the water table taken from aquifer wells at or near the INEEL. When accurate data on the amount of deviation in any given borehole is acquired, then measurements of depth-to-water can be adjusted to reflect the true depth so more accurate conceptual models can be developed. Collection of additional borehole deviation data with gyroscopic logging is planned for selected wells to further our confidence in the quality of water level measurements. Selection of wells for the planned logging is based on qualitative and quantitative screening criteria. An existing data set from magnetic deviation logs was useful in establishing these criteria however, are considered less accurate than gyroscopic deviation logs under certain conditions. Population distributions for 128 aquifer wells with magnetic deviation data were used to establish three quantitative screening thresholds. Qualitative criteria consisted of administrative controls, accessibility issues, and drilling methods. Qualitative criteria eliminated all but 116 of the 337 aquifer wells, in the vicinity of the INEEL, that were initially examined in this screening effort. Of these, 72 have associated magnetic deviation data; 44 do not. Twenty-five (25) of the 72 wells with magnetic deviation data have deviation greater than one of the three quantitative screening thresholds. These 25 are recommended for the planned gyroscopic borehole deviation surveying. Nineteen (19) of the 44 wells without magnetic deviation data were selected for the planned gyroscopic logging based on their location relative to facilities, site boundaries, and contaminant transport concerns. In total, 44 aquifer wells (25 with magnetic deviation data and 19 without) are recommended for planned gyroscopic logging.

  16. GENETIC DIVERSITY AND SOCIETALLY IMPORTANT DISPARITIES -supplement S1 Log population density in 1500 CE

    E-print Network

    Rosenberg, Noah

    GENETIC DIVERSITY AND SOCIETALLY IMPORTANT DISPARITIES - supplement S1 Log population density Genetic variables Observed diversity 413.504*** 225.443*** 203.817* (97.320) (73.781) (97.637) 0.000483 0 for the non-genetic variables and 53 population-specific values of genetic diversity from Ramachandran et al

  17. The Nevada Test Site neutron log calibrator

    SciTech Connect

    Hearst, J.R.

    1994-02-01

    A new calibrator for neutron logs in large-diameter holes has been built at the Nevada Test Site. It consists of two cylinders, each made of six wedge-shaped cells. The outside diameter of each cylinder is 4.8 m, and the inside diameter is 2.4 m; the height is 2.3 m. The cells were filled with mixtures of hydrated alumina, tabular alumina, sand, and water to achieve a large range of bulk density and hydrogen index. A new calibration algorithm, using three-dimensional interpolation in hydrogen index-gap-density space has been developed to determine hydrogen index from log data. There is evidence that the new algorithm is slightly more accurate than the previous algorithm.

  18. Quantifying logging residue - before the fact

    SciTech Connect

    Bones, J.T.

    1982-06-01

    Tree biomass estimation, which is being integrated into the U.S. Forest Service Renewable Resources Evaluation Program, will give foresters the ability to estimate the amount of logging residues they might expect from harvested treetops and branches and residual rough, rotten, and small trees before the actual harvest. With planning, and increased demand for such timber products as pulpwood and fuelwood, product recovery could be increased by up to 43 percent in softwood stands and 99% in hardwoods. Recovery levels affect gross product receipts and site preparation costs. An example of product recovery and residue generation is presented for three harvesting options in Pennsylvania hardwood stands. Under the whole-tree harvesting option, 46% more product was recovered than in single product harvesting, and logging residue levels were reduced by 58%.

  19. INSPIRE and SPIRES Log File Analysis

    SciTech Connect

    Adams, Cole; /Wheaton Coll. /SLAC

    2012-08-31

    SPIRES, an aging high-energy physics publication data base, is in the process of being replaced by INSPIRE. In order to ease the transition from SPIRES to INSPIRE it is important to understand user behavior and the drivers for adoption. The goal of this project was to address some questions in regards to the presumed two-thirds of the users still using SPIRES. These questions are answered through analysis of the log files from both websites. A series of scripts were developed to collect and interpret the data contained in the log files. The common search patterns and usage comparisons are made between INSPIRE and SPIRES, and a method for detecting user frustration is presented. The analysis reveals a more even split than originally thought as well as the expected trend of user transition to INSPIRE.

  20. Measuring pad arrangement for a logging sonde

    SciTech Connect

    Vannier, D.; Tromelin, J.

    1989-08-29

    This patent describes a logging sonde for use in a borehole traversing an earth formation. The logging sonde comprising: an elongated sonde body; a plurality of measuring means for measuring a characteristic of the earth formation. Each of the measuring means comprising: a central element; a first measuring flap hingably connected to the central element; a second measuring flap hingable connected to the central element. The measuring flaps being disposed on either side of the central element, the first measuring flap staggered relative to the second measuring flap along the longitudinal direction of the sonde body; means operatively connected between the sonde body and the first and second measuring flaps for applying a resilient force to each of the measuring flaps, thereby tending to move the flaps away from the sonde body; and means connected between the sonde body and each of the measuring means for translocating the measuring means away from and back to the sonde body.

  1. Precision pressure/temperature logging tool

    SciTech Connect

    Henfling, J.A.; Normann, R.A.

    1998-01-01

    Past memory logging tools have provided excellent pressure/temperature data when used in a geothermal environment, and they are easier to maintain and deploy than tools requiring an electric wireline connection to the surface. However, they are deficient since the tool operator is unaware of downhole conditions that could require changes in the logging program. Tools that make ``decisions`` based on preprogrammed scenarios can partially overcome this difficulty, and a suite of such memory tools has been developed at Sandia National Laboratories. The first tool, which forms the basis for future instruments, measures pressure and temperature. Design considerations include a minimization of cost while insuring quality data, size compatibility with diamond-cored holes, operation in holes to 425 C (800 F), transportability by ordinary passenger air service, and ease of operation. This report documents the development and construction of the pressure/temperature tool. It includes: (1) description of the major components; (2) calibration; (3) typical logging scenario; (4) tool data examples; and (5) conclusions. The mechanical and electrical drawings, along with the tool`s software, will be furnished upon request.

  2. Chiral Gravity, Log Gravity and Extremal CFT

    E-print Network

    Alexander Maloney; Wei Song; Andrew Strominger

    2009-03-26

    We show that the linearization of all exact solutions of classical chiral gravity around the AdS3 vacuum have positive energy. Non-chiral and negative-energy solutions of the linearized equations are infrared divergent at second order, and so are removed from the spectrum. In other words, chirality is confined and the equations of motion have linearization instabilities. We prove that the only stationary, axially symmetric solutions of chiral gravity are BTZ black holes, which have positive energy. It is further shown that classical log gravity-- the theory with logarithmically relaxed boundary conditions --has finite asymptotic symmetry generators but is not chiral and hence may be dual at the quantum level to a logarithmic CFT. Moreover we show that log gravity contains chiral gravity within it as a decoupled charge superselection sector. We normally evaluate the Euclidean sum over geometries of chiral gravity and show that it gives precisely the holomorphic extremal CFT partition function. The modular invariance and integrality of the expansion coefficients of this partition function are consistent with the existence of an exact quantum theory of chiral gravity. We argue that the problem of quantizing chiral gravity is the holographic dual of the problem of constructing an extremal CFT, while quantizing log gravity is dual to the problem of constructing a logarithmic extremal CFT.

  3. 33 CFR 207.370 - Big Fork River, Minn.; logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Navigable Waters 3 2012-07-01 2012-07-01 false Big Fork River, Minn.; logging. 207.370 Section 207.370...DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.370 Big Fork River, Minn.; logging. (a) During the...

  4. 33 CFR 207.370 - Big Fork River, Minn.; logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Navigable Waters 3 2013-07-01 2013-07-01 false Big Fork River, Minn.; logging. 207.370 Section 207.370...DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.370 Big Fork River, Minn.; logging. (a) During the...

  5. 33 CFR 207.370 - Big Fork River, Minn.; logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 3 2010-07-01 2010-07-01 false Big Fork River, Minn.; logging. 207.370 Section 207.370...DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.370 Big Fork River, Minn.; logging. (a) During the...

  6. 33 CFR 207.370 - Big Fork River, Minn.; logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Navigable Waters 3 2011-07-01 2011-07-01 false Big Fork River, Minn.; logging. 207.370 Section 207.370...DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.370 Big Fork River, Minn.; logging. (a) During the...

  7. 33 CFR 207.370 - Big Fork River, Minn.; logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Navigable Waters 3 2014-07-01 2014-07-01 false Big Fork River, Minn.; logging. 207.370 Section 207.370...DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.370 Big Fork River, Minn.; logging. (a) During the...

  8. 2. VIEW OF BLOCK AND TACKLE FOR MOVING CEDAR LOGS ...

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

    2. VIEW OF BLOCK AND TACKLE FOR MOVING CEDAR LOGS FROM POND TO JACK LADDER--AN ENDLESS CHAIN CONVEYOR THAT MOVES LOGS INTO MILL - Lester Shingle Mill, 1602 North Eighteenth Street, Sweet Home, Linn County, OR

  9. 8. William E. Barrett, Photographer, August 1975. LOG DOCK AND ...

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

    8. William E. Barrett, Photographer, August 1975. LOG DOCK AND PARTIALLY DEMOLISHED JACKSLIP USED FOR HAULING LOGS UP TO SAWMILL. - Meadow River Lumber Company, Highway 60, Rainelle, Greenbrier County, WV

  10. 3. MAIN ELEVATION, DETAIL SHOWING HEWN LOGS WITH HALFDOVETAIL JOINTS; ...

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

    3. MAIN ELEVATION, DETAIL SHOWING HEWN LOGS WITH HALF-DOVETAIL JOINTS; LATHE AND PLASTER ADDITION; AND CLAPBOARD SIDING - Shinn-Curtis Log Cabin, 23 Washington Street (moved from Rancocas Boulevard), Mount Holly, Burlington County, NJ

  11. 35. SOUTHWEST CORNER OF EAST CHIMNEY BASE SHOWING CONTINUOUS LOG ...

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

    35. SOUTHWEST CORNER OF EAST CHIMNEY BASE SHOWING CONTINUOUS LOG FOUNDATION OVER VAULT AND THE WEST CRIBBING LOG WITH STONE FILL ON THE EAST. - Penacook House, Daniel Webster Highway (U.S. Route 3), Boscawen, Merrimack County, NH

  12. 6. SIDE ELEVATION, DETAIL SHOWING ORIGINAL LOG CONSTRUCTION, CLAPBOARD ADDITION ...

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

    6. SIDE ELEVATION, DETAIL SHOWING ORIGINAL LOG CONSTRUCTION, CLAPBOARD ADDITION AND CHIMNEY STACK - Shinn-Curtis Log Cabin, 23 Washington Street (moved from Rancocas Boulevard), Mount Holly, Burlington County, NJ

  13. 4. Exterior, detail south elevation, showing jointing of logs on ...

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

    4. Exterior, detail south elevation, showing jointing of logs on later extension. Sept. 12, 1940. Mixon. - Upper Swedish Log Cabin, Darby Creek vicinity, Clifton Heights (Upper Darby Township), Darby, Delaware County, PA

  14. 5. Log draft horse barn. Detail of west side showing ...

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

    5. Log draft horse barn. Detail of west side showing Dutch door and square notching at wall corner. View to east. - William & Lucina Bowe Ranch, Log Draft Horse Barn, 290 feet southwest of House, Melrose, Silver Bow County, MT

  15. 8. Double crib barn, south corner, log section, loft area, ...

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

    8. Double crib barn, south corner, log section, loft area, detail of log construction - Wilkins Farm, Barn, South side of Dove Hollow Road, 6000 feet east of State Route 259, Lost City, Hardy County, WV

  16. Illegal Logging and Illegal Activites in the Forestry Sector

    E-print Network

    . Consequences on the wood products industry 5. Fight against illegal logging & illegal activities 6. Conclusion;2. Illegal logging vs illegal activities in the forestry sector Illegal activities : · Illegal occupation

  17. Applying multiwell normalization in open hole log analysis 

    E-print Network

    Sinanan, Haydn Brent

    1997-01-01

    , the logging data must be depth shifted, borehole corrected, then normalized. The normalized data can then be analyzed using modem interpretation methods to obtain consistent results from well to well. Well logs provide the data that allow geologists...

  18. Film Badge Application Radioactive Material Package Receipt Log

    E-print Network

    Slatton, Clint

    ;RADIOACTIVE MATERIAL PACKAGE RECEIPT LOG DATE: DELIVERED BY: AUTHORIZED BY: Contamination Check DPM/100 cm2APPENDIX A Film Badge Application Radioactive Material Package Receipt Log Radioactive Material's supervisor declaring pregnancy and approximate date of conception. PRINT NAME

  19. Acoustic Waveform Logging - Advances In Theory And Application

    E-print Network

    Cheng, C. H.

    Full-waveform acoustic logging has made significant advances in both theory and application in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of ...

  20. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES TAYLOR SANCTIONS REGULATIONS General Definitions § 593.309 Round log or timber product. The term round log or...

  1. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES TAYLOR SANCTIONS REGULATIONS General Definitions § 593.309 Round log or timber product. The term round log or...

  2. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES TAYLOR SANCTIONS REGULATIONS General Definitions § 593.309 Round log or timber product. The term round log or...

  3. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES TAYLOR SANCTIONS REGULATIONS General Definitions § 593.309 Round log or timber product. The term round log or...

  4. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES TAYLOR SANCTIONS REGULATIONS General Definitions § 593.309 Round log or timber product. The term round log or...

  5. Console Log Keeping Made Easier - Tools and Techniques for Improving Quality of Flight Controller Activity Logs

    NASA Technical Reports Server (NTRS)

    Scott, David W.; Underwood, Debrah (Technical Monitor)

    2002-01-01

    At the Marshall Space Flight Center's (MSFC) Payload Operations Integration Center (POIC) for International Space Station (ISS), each flight controller maintains detailed logs of activities and communications at their console position. These logs are critical for accurately controlling flight in real-time as well as providing a historical record and troubleshooting tool. This paper describes logging methods and electronic formats used at the POIC and provides food for thought on their strengths and limitations, plus proposes some innovative extensions. It also describes an inexpensive PC-based scheme for capturing and/or transcribing audio clips from communications consoles. Flight control activity (e.g. interpreting computer displays, entering data/issuing electronic commands, and communicating with others) can become extremely intense. It's essential to document it well, but the effort to do so may conflict with actual activity. This can be more than just annoying, as what's in the logs (or just as importantly not in them) often feeds back directly into the quality of future operations, whether short-term or long-term. In earlier programs, such as Spacelab, log keeping was done on paper, often using position-specific shorthand, and the other reader was at the mercy of the writer's penmanship. Today, user-friendly software solves the legibility problem and can automate date/time entry, but some content may take longer to finish due to individual typing speed and less use of symbols. File layout can be used to great advantage in making types of information easy to find, and creating searchable master logs for a given position is very easy and a real lifesaver in reconstructing events or researching a given topic. We'll examine log formats from several console position, and the types of information that are included and (just as importantly) excluded. We'll also look at when a summary or synopsis is effective, and when extensive detail is needed.

  6. Outcrop gamma-ray logging applied to subsurface petroleum geology

    SciTech Connect

    Slatt, R.M.; Borer, J.M.; Horn, B.W.

    1995-10-01

    Developing a gamma-ray log profile of an outcrop with a hand-held scintillometer has many applications to subsurface petroleum geology. The outcrop gamma-ray log provides a readily understandable bridge between what is observed in outcrop and what is to be interpreted on well logs and seismic records. Several examples are presented in this paper that demonstrate major applications. An outcrop from the Cretaceous Mesaverde Group in Colorado provides an excellent example of the use of outcrop gamma-ray logs to better visualize spatial variability of depositional settings for improved well log correlations. Out crops from the Cretaceous Almond Formation, Niobrara Formation, and Graneros Shale in Colorado serve as examples of outcrop gamma-ray logging used to correlate outcrops with their subsurface equivalents for improved lithologic and stratigraphic interpretation of well logs. Outcrops of the Cretaceous Sharon Springs Member of the Pierre Shale in Colorado and the Eocene Green River Formation in Wyoming provide examples of the application of outcrop-gamma ray logging to identify and characterize organic-rich shales in outcrops and on well logs. Outcrops of the Pennsylvanian Jackfork Formation in Arkansas demonstrate the use of outcrop logging to yield improved interpretation of reservoir quality on well logs and for one- and two-dimensional seismic modeling. An outcrop of Precambrian and Cambro-Ordovician rocks from Algeria provides an example of outcrop logging to recognize unconformities and other major surfaces on well logs. An outcrop of the Niobrara Formation in Colorado is used as an example for improved understanding of horizontal gamma-ray log response. The example logs presented are all drived with a hand-held scintillometer. This technique is simple, quick, and relatively inexpensive, so is recommended for any outcrop work that is intended to be applied t;o subsurface well logs or seismic interpretation.

  7. Please consider the environment before printing Amazon logging industry declines

    E-print Network

    Please consider the environment before printing Amazon logging industry declines mongabay.com June on the Amazon logging industry in Brazil, reports a major new assessment conducted by Imazon and the Brazilian Forest Service. The report, "Logging in Brazilian Amazon: production, revenues and markets" (A atividade

  8. EFFECTS OF LOG HANDLING AND STORAGE ON WATER QUALITY

    EPA Science Inventory

    The biological and chemical effects of three types of log storage on water quality were investigated. Three flow-through log ponds, two wet deck operations, and five log rafting areas were studied. Both biological and chemical aspects of stream quality can be adversely affected b...

  9. Automated detection of severe surface defects on barked hardwood logs

    E-print Network

    Shaffer, Clifford A.

    severe external defects on the surfaces of barked hard- wood logs and stems. To summarize the main defect of real log defect samples. Three-dimensional laser-scanned range data captured the external log shapes requires a tremendous amount of x-ray energy. Finally, the high cost of the scanning equipment--on average

  10. The Learning Log as an Integrated Instructional Assessment Tool.

    ERIC Educational Resources Information Center

    Topaz, Beverley

    1997-01-01

    Use of student learning logs is recommended as a means for both students and teacher to assess second-language learning. The approach encourages learners to analyze their learning difficulties and plan for overcoming them. Incorporated into portfolios, logs can be used to analyze progress. Sample log sheet and chart used as a framework for…

  11. The Relative Overhead of Piggybacking in Causal Message Logging Protocols

    E-print Network

    Alvisi, Lorenzo

    The Relative Overhead of Piggybacking in Causal Message Logging Protocols Karan Bhatia University processes to a consistent state, message logging protocols ensure that these processes, when recovering, make the same choices when re­executing nondeterministic events. Causal message logging protocols

  12. Scoped Identifiers for Efficient Bit Aligned Logging Computer Science Department

    E-print Network

    Cho, Young Hyun

    Scoped Identifiers for Efficient Bit Aligned Logging Roy Shea Computer Science Department of standard diagnostic tools within this domain. This work introduces the Log Instrumentation Specification (LIS), which provides a high level logging interface to developers and is able to create extremely

  13. A CASE STUDY FOR A BIOMASS LOGGING OPERATION [ Print | Close

    E-print Network

    A CASE STUDY FOR A BIOMASS LOGGING OPERATION [ Print | Close ] December 2005 With the recent prices Texas could need substantial supplies of woody biomass. Logging contractors may ask 1) what does it take to start a logging business for woody biomass, 2) how much does it cost to produce, and 3) is it profitable

  14. Using Remote Logging for Teaching Concurrency Steven Robbins

    E-print Network

    Robbins, Steven

    Using Remote Logging for Teaching Concurrency Steven Robbins Department of Computer Science or processes can interfere with each other and garble the results. The remote logging tool described here allows multiple processes or threads to atomically log messages to a local or remote host. Different

  15. Partnership Logging Accidents Cornelis de Hoop, LA Forest Products Lab

    E-print Network

    Partnership Logging Accidents · by · Cornelis de Hoop, LA Forest Products Lab · Albert Lefort, · Sonny Mills, LA Dept. of Labor · Greg Honaker, OSHA #12;OSHA -- LA Logging Council Strategic Partnership of Injury · Steps on machine or truck · Trees / limbs / logs #12;Nature of Injury Other Cuts Sprains

  16. Learning Logs in the Science Classroom: The Literacy Advantage

    ERIC Educational Resources Information Center

    Steenson, Cheryl

    2006-01-01

    In this article, the author discusses one of the most functional forms of writing to learn, the two-column learning logs. Two-column learning logs are based on the premise that collecting information and processing information are two very different aspects of learning. Two-column logs allow students to connect the facts and theories of science to…

  17. Geochemical logging of a middle east carbonate reservoir

    SciTech Connect

    Herron, S.L.; Dove, R.E. ); Petricola, M. )

    1992-11-01

    This paper reports on geochemical logs which when run through a complex carbonate formation yield accurate elemental concentration logs. These are instrumental to the computation of detailed formation mineralogy and derivative properties, such as matrix density and sigma. The quantitative mineralogy logs also are used to estimate permeability empirically with a correlation observed from core data.

  18. Why, What, and How to Log? Lessons from LISTEN

    ERIC Educational Resources Information Center

    Mostow, Jack; Beck, Joseph E.

    2009-01-01

    The ability to log tutorial interactions in comprehensive, longitudinal, fine-grained detail offers great potential for educational data mining--but what data is logged, and how, can facilitate or impede the realization of that potential. We propose guidelines gleaned over 15 years of logging, exploring, and analyzing millions of events from…

  19. An Oblivious Transfer Protocol with Log-Squared Communication

    E-print Network

    International Association for Cryptologic Research (IACR)

    An Oblivious Transfer Protocol with Log-Squared Communication Helger Lipmaa 1 Cybernetica AS, Lai 6-computation and communication (k · log2 n + · log n), where k is a possibly non-constant security parameter. The new proto- col communication and is private in the standard complexity-theoretic model. Keywords. Computationally

  20. An Oblivious Transfer Protocol with LogSquared Communication

    E-print Network

    International Association for Cryptologic Research (IACR)

    An Oblivious Transfer Protocol with Log­Squared Communication Helger Lipmaa 1 Cybernetica AS, Lai 6­computation and communication #(k · log 2 n + # · log n), where k is a possibly non­constant security parameter. The new proto the same asymptotic communication and is private in the standard complexity­theoretic model. Keywords

  1. Vol. 44, No. 1 April 2000 Mariners Weather Log

    E-print Network

    Vol. 44, No. 1 April 2000 Mariners Weather Log Jack Tar (Completed by Jeremiah Dodge of New York on page 14. #12;2 Mariners Weather Log From the Editorial Supervisor Mariners Weather Log Mariners Weather Administration Dr. D. James Baker, Administrator National Weather Service John J. Kelly, Jr., Assistant

  2. Mining Criminal Networks from Chat Log Farkhund Iqbal

    E-print Network

    Fung, Benjamin C. M.

    Mining Criminal Networks from Chat Log Farkhund Iqbal College of Information Technology Zayed to analyze online messages for the purpose of crime investigation. Our framework takes the chat log from a confiscated computer as input, extracts the social networks from the log, summarizes chat conversations

  3. An evaluation of the use of drillers' logs in lithologic studies of the Ogallala Formation of the southern high plains of Texas, progress report, 1970-71

    USGS Publications Warehouse

    Wilson, C.A.; Smith, Joe T.; Thompson, G.L.; Sandeen, W.M.

    1972-01-01

    Logs made by water-well drillers were analyzed in conjunction with test-hole drilling and geophysical logging to evaluate usefulness of the driller's log in delineating areas that would be suitable for artificial recharge of the Ogallala Formation. This preliminary study indicates that lack of detailed and accurate information in many drillers' logs prevents their use as a reliable source of lithologic information. For many applications, such as evaluation of potential areas for artificial recharge, the value of more complete and more accurate information will be readily apparent as these applications become more widespread. More effort will be required in collecting lithologic information as part of the drilling operations.

  4. Singular value decomposition 1. Calculate the singular values of the G matrix. Plot singular values si as a function of index i on

    E-print Network

    Gerstoft, Peter

    Singular value decomposition 1. Calculate the singular values of the G matrix. Plot singular values si as a function of index i on a semi-log plot. What do you notice about the shape ? [You may find(S)). and a semilog plot is achieved with routine semilogy.] 2. Use MATLAB commands to get the rank and condition

  5. Experimental correlation between the p Ka value of sulfonphthaleins with the nature of the substituents groups

    NASA Astrophysics Data System (ADS)

    Balderas-Hernández, Patricia; Ramírez-Silva, María Teresa; Romero-Romo, Mario; Palomar-Pardavé, Manuel; Roa-Morales, Gabriela; Barrera-Diaz, Carlos; Rojas-Hernández, Alberto

    2008-04-01

    This work presents the results obtained from a spectrophotometry study performed on some indicators of the sulfonphtaleins like phenol red (PR), thymol blue (TB), bromothymol blue (BTB), xylenol orange (XO) and methylthymol blue (MTB). During the first stage the acidity constants of some of the indicators were determined using the data from spectrophotometry, potentiometry and with the use of the software SQUAD. These were as follows: for the equilibrium 2H + BTB ? H 2BTB, log ?2 = 15.069 ± 0.046 and for H + BTB ? HBTB, log ?1 = 8.311 ± 0.044. For the XO and the MTB five values were calculated for each, namely, for MTB: log ?5 = 42.035, log ?4 = 38.567 ± 0.058, log ?3 = 32.257 ± 0.057, log ?2 = 23.785 ± 0.057, and log ?1 = 12.974 ± 0.045 while for XO: log ?5 = 40.120 ± 0.102, log ?4 = 35.158 ± 0.062, log ?3 = 29.102 ± 0.053, log ?2 = 21.237 ± 0.044, and log ?1 = 11.682 ± 0.044. During the second stage, a study was conducted on the effect of the substituents present in the indicators to determine the effect of different functional groups on the p Ka value corresponding to the last indicator's dissociation.

  6. Annual Logging Symposium, June 3-6, 2007 JOINT INVERSION OF DENSITY AND RESISTIVITY LOGS FOR THE

    E-print Network

    Torres-Verdín, Carlos

    SPWLA 48th Annual Logging Symposium, June 3-6, 2007 1 JOINT INVERSION OF DENSITY AND RESISTIVITY LOGS FOR THE IMPROVED PETROPHYSICAL ASSESSMENT OF THINLY-BEDDED CLASTIC ROCK FORMATIONS Zhipeng Liu, Robert Terry, BP Copyright 2007, held jointly by the Society of Petrophysicists and Well Log Analysts

  7. The Borneo Project : Indonesia Fails to Stop Illegal Logging, Report Says Indonesia Fails to Stop Illegal Logging, Report Says

    E-print Network

    The Borneo Project : Indonesia Fails to Stop Illegal Logging, Report Says Indonesia Fails to Stop Illegal Logging, Report Says by Irwan Firdaus, The Associated Press January 15th, 2003 JAKARTA, Indonesia -- Corruption in Indonesia's police and military has contributed to a surge in illegal logging that has

  8. Apparatus for focused electrode induced polarization logging

    SciTech Connect

    Vinegar, H.J.; Waxman, M.H.

    1986-04-15

    An induced polarization logging tool is described for measuring parameters of a formation surrounding a borehole. The logging tool consists of: a non-conductive logging sonde; a plurality of electrodes disposed on the sonde, the electrodes including at least a survey current electrode and guard electrodes disposed on opposite sides of the survey current electrode, a non-polarizing voltage measuring electrode, a non-polarizing voltage reference electrode and a current return electrode, both the voltage reference and current return electrodes being located a greater distance from the survey current electrode than the guard electrodes; means connected to the survey current electrode and the guard electrodes for generating a signal representative of the potential difference in the formation between the survey current electrode and the guard electrodes; first control means directly coupled to the survey current electrode, the first control means controlling the current flow to the survey current electrode in response to the potential difference signal; a second control means directly coupled to the guard electrodes to control the current flow to the guard electrodes in response to the potential difference signal; a source of alternating current located at the surface, one end of the source being coupled to the two control means and the other to the current return electrode, the source supplying alternating current at various discrete frequencies between substantially 0.01 and 100 Hz; measurement means directly coupled to the voltage measurement and survey current electrodes to measure the amplitude and phase of the voltage induced in the formation and the amplitude and phase of the current flow to the survey electrode; and transmission means for transmitting the measurements to the surface.

  9. Hypercontractivity for log-subharmonic functions

    E-print Network

    Graczyk, Piotr; Loeb, Jean-Jacques; Zak, Tomasz

    2008-01-01

    We prove strong hypercontractivity (SHC) inequalities for logarithmically subharmonic functions on $R^n$ and different classes of measures: Gaussian measures on $R^n$, symmetric Bernoulli, symmetric uniform probability measures, as well as their convolutions if one of the convolved measures is compactly supported. A slightly weaker strong hypercontractivity property holds for any symmetric measure on $R$. For all 1--dimensional measures for which we know the (SHC) holds, we prove a Log--Sobolev inequality which is stronger than the classical one. This result is extended to all dimensions for compactly-supported measures.

  10. Identifying related journals through log analysis

    PubMed Central

    Lu, Zhiyong; Xie, Natalie; Wilbur, W. John

    2009-01-01

    Motivation: With the explosion of biomedical literature and the evolution of online and open access, scientists are reading more articles from a wider variety of journals. Thus, the list of core journals relevant to their research may be less obvious and may often change over time. To help researchers quickly identify appropriate journals to read and publish in, we developed a web application for finding related journals based on the analysis of PubMed log data. Availability: http://www.ncbi.nlm.nih.gov/IRET/Journals Contact: luzh@ncbi.nlm.nih.gov Supplementary information: Supplementary data are available at Bioinformatics online. PMID:19734155

  11. Interlacing Log-concavity of the Boros-Moll Polynomials

    E-print Network

    Chen, William Y C; Xia, Ernest X W

    2010-01-01

    We introduce the notion of interlacing log-concavity of a polynomial sequence $\\{P_m(x)\\}_{m\\geq 0}$, where $P_m(x)$ is a polynomial of degree m with positive coefficients $a_{i}(m)$. This sequence of polynomials is said to be interlacing log-concave if the ratios of consecutive coefficients of $P_m(x)$ interlace the ratios of consecutive coefficients of $P_{m+1}(x)$ for any $m\\geq 0$. Interlacing log-concavity is stronger than the log-concavity. We show that the Boros-Moll polynomials are interlacing log-concave. Furthermore we give a sufficient condition for interlacing log-concavity which implies that some classical combinatorial polynomials are interlacing log-concave.

  12. Obtaining permeability estimates from NMR logging data in an unconsolidated groundwater aquifer

    NASA Astrophysics Data System (ADS)

    Dlubac, K.; Knight, R. J.; Song, Y.; Bachman, N.; Grau, B.; Cannia, J. C.; Williams, J.

    2011-12-01

    There is growing interest in the use of proton nuclear magnetic resonance (NMR) logging for aquifer characterization because it provides information about water-filled porosity and pore space geometry that can be used to estimate permeability (k). Hydrologists estimate hydraulic conductivity, from which k can be calculated, using wellbore flow (WBF) logging. WBF logging data distributes the total hydraulic conductivity, determined from aquifer testing, throughout the aquifer. However, this method is time consuming and has relatively low vertical resolution. If reliable estimates of k can be obtained from NMR logging data, this would provide hydrologists with an efficient alternate method for characterizing aquifer properties. The Schlumberger Doll Research (SDR) and Timur-Coates (T-C) equations are widely used in petroleum applications to obtain k from NMR logging measurements of the relaxation time T2. In this abstract, we focus on the SDR equation which takes the form kSDR=a? mT2MLn where a, m and n are empirical constants, T2ML is the mean log of the T2 distribution and ? is porosity. The constants have been empirically determined in consolidated materials and are typically assumed to have the following values: a=4, m=4 and n=2. The use of the SDR equation with these values has been found to yield reliable estimates of k in consolidated materials. However, this same equation underestimates k in unconsolidated materials. In this study, we collected NMR logging, aquifer-test, and WBF data from a 150-m deep well that penetrated the High Plains aquifer in central Nebraska. We then worked with a generalized form of the SDR equation: kSDR Generalized =a? mT2AVG2, where we allowed T2AVG to be calculated as the mean log and arithmetic mean (T2AM) of the T2 distribution. We elected to set the exponent n on the T2 term equal to 2, which results in a k estimate that has the appropriate units of length squared. We used a semi-constrained least squares inversion to optimize the fit between log WBF-k and log NMR-k. We constrained m to be positive, ranging from 0.5 and 8, increasing in value with an interval of 0.5; a was unconstrained. NMR logging measurements were made throughout the well every 0.45 m. WBF logging provided k estimates over nine 6-m intervals. Within these nine intervals, NMR-k estimates were upscaled to the resolution of the WBF as follows: kUpscaled=??i(a?mT2AVG2), where ?i was 0.45 m. In the form of the SDR equation used in petroleum applications, NMR-k was underestimated by an order of magnitude in 6 intervals and overestimated in one interval. We found that the following equation yielded the best agreement between NMR-k and WBF-k: kUnconsolidated =16? 6T2AM2. In 6 of the 9 intervals, NMR-k estimates were within a factor of 2 of WBF-k. However, in two intervals NMR-k disagrees with WBF-k by over a factor of 5.

  13. Analysis of geophysical well logs obtained in the State 2-14 borehole, Salton Sea geothermal area, California

    USGS Publications Warehouse

    Paillet, F.L.; Morin, R.H.

    1988-01-01

    A complete suite of conventional geophysical well logs was obtained in the upper part of a 3220-m-deep borehole drilled into geothermally altered alluvial sediments on the southeastern edge of the Salton Sea. Geophysical logs obtained in the State 2-14 borehole indicate that neutron porosity, gamma-gamma, and deep-induction logs provide useful information on lithologic trends with depth. The natural gamma log contains almost continuous, high-frequency fluctuations that obscure lithologic trends and that may be related to recent radioisotope redistribution and departure from radiometric equilibrium. Acoustic transit time logs give unrealistically low in situ compressional velocities ranging from 1.8 to 3.0 km/s, whereas acoustic waveform logs indicate that sediment compressional velocities range from less than 3.0 km/s shallower than 1000 m in depth to almost 5.0 km/s at depths greater than 2000 m. Analyses indicate that most log values lie between two lithologic end points: an electrically conductive claystone with moderate neutron porosity, but no effective porosity, and an electrically nonconductive, fully cemented siltstone that has small but finite porosity. -from Authors

  14. AVO and anisotropy from logs and walkaways

    SciTech Connect

    Leaney, S.W.; Borland, W.E. )

    1994-07-01

    AVO (amplitude versus offset) is the seismic technique used for mapping lithology, and modeling is an important step for successful AVO interpretations. Shear velocity measurements are essential, since AVO attempts to exploit the elastic (as opposed to acoustic) nature of seismic wave propagation. A property of seismic wave propagation not often considered is anisotropy. This is probably because the magnitude of the anisotropy has been difficult to measure, and its effect on AVO is not widely known. New technology is helping to improve AVO modeling. Dipole source shear logging tools can now measure very slow shear velocities, increasing the range of applicability of AVO, and new borehole seismic techniques can measure anisotropy. When integrated, these new measurements provide more detailed information about the elastic moduli that govern wave propagation, and bring the possibility for greater reliability in AVO interpretation. Two examples of ray-trace AVO synthetics are shown to illustrate typical AVO responses and the importance of shear velocity information. An overview of anisotropy is given and a new technique to estimate anisotropy from walkaway surveys (multi-offset VSPs) is described. The log and walkaway measurements are then integrated to study the impact of anisotropy on AVO. First, the effect of anisotropy on Ostrander's shale-sand model is investigated, and second, isotropic and anisotropic ray-trace synthetics are compared. The effect of anisotropy on AVO is found to be significant and may be lead to misinterpretations of AVO anomalies.

  15. Dewarless Logging Tool - 1st Generation

    SciTech Connect

    HENFLING,JOSEPH A.; NORMANN,RANDY A.

    2000-08-01

    This report focuses on Sandia National Laboratories' effort to create high-temperature logging tools for geothermal applications without the need for heat shielding. One of the mechanisms for failure in conventional downhole tools is temperature. They can only survive a limited number of hours in high temperature environments. For the first time since the evolution of integrated circuits, components are now commercially available that are qualified to 225 C with many continuing to work up to 300 C. These components are primarily based on Silicon-On-Insulator (SOI) technology. Sandia has developed and tested a simple data logger based on this technology that operates up to 300 C with a few limiting components operating to only 250 C without thermal protection. An actual well log to 240 C without shielding is discussed. The first prototype high-temperature tool measures pressure and temperature using a wire-line for power and communication. The tool is based around the HT83C51 microcontroller. A brief discussion of the background and status of the High Temperature Instrumentation program at Sandia, objectives, data logger development, and future project plans are given.

  16. Dual excitation acoustic paramagnetic logging tool

    DOEpatents

    Vail, W.B. III.

    1989-02-14

    New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be performed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described. 6 figs.

  17. Dual excitation acoustic paramagnetic logging tool

    DOEpatents

    Vail, III, William B. (Bothell, WA)

    1989-01-01

    New methods and apparatus are disclosed which allow measurement of the presence of oil and water in gelogical formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleous present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described.

  18. Close-Call Action Log Form

    NASA Technical Reports Server (NTRS)

    Spuler, Linda M.; Ford, Patricia K.; Skeete, Darren C.; Hershman, Scot; Raviprakash, Pushpa; Arnold, John W.; Tran, Victor; Haenze, Mary Alice

    2005-01-01

    "Close Call Action Log Form" ("CCALF") is the name of both a computer program and a Web-based service provided by the program for creating an enhanced database of close calls (in the colloquial sense of mishaps that were avoided by small margins) assigned to the Center Operations Directorate (COD) at Johnson Space Center. CCALF provides a single facility for on-line collaborative review of close calls. Through CCALF, managers can delegate responses to employees. CCALF utilizes a pre-existing e-mail system to notify managers that there are close calls to review, but eliminates the need for the prior practices of passing multiple e-mail messages around the COD, then collecting and consolidating them into final responses: CCALF now collects comments from all responders for incorporation into reports that it generates. Also, whereas it was previously necessary to manually calculate metrics (e.g., numbers of maintenance-work orders necessitated by close calls) for inclusion in the reports, CCALF now computes the metrics, summarizes them, and displays them in graphical form. The reports and all pertinent information used to generate the reports are logged, tracked, and retained by CCALF for historical purposes.

  19. No-reference image quality assessment based on log-derivative statistics of natural scenes

    NASA Astrophysics Data System (ADS)

    Zhang, Yi; Chandler, Damon M.

    2013-10-01

    We propose an efficient blind/no-reference image quality assessment algorithm using a log-derivative statistical model of natural scenes. Our method, called DErivative Statistics-based QUality Evaluator (DESIQUE), extracts image quality-related statistical features at two image scales in both the spatial and frequency domains. In the spatial domain, normalized pixel values of an image are modeled in two ways: pointwise-based statistics for single pixel values and pairwise-based log-derivative statistics for the relationship of pixel pairs. In the frequency domain, log-Gabor filters are used to extract the fine scales of the image, which are also modeled by the log-derivative statistics. All of these statistics can be fitted by a generalized Gaussian distribution model, and the estimated parameters are fed into combined frameworks to estimate image quality. We train our models on the LIVE database by using optimized support vector machine learning. Experiment results tested on other databases show that the proposed algorithm not only yields a substantial improvement in predictive performance as compared to other state-of-the-art no-reference image quality assessment methods, but also maintains a high computational efficiency.

  20. Evaluation of QSAR models for predicting the partition coefficient (logP) of chemicals under the REACH regulation.

    PubMed

    Cappelli, Claudia Ileana; Benfenati, Emilio; Cester, Josep

    2015-11-01

    The partition coefficient (logP) is a physicochemical parameter widely used in environmental and health sciences and is important in REACH and CLP regulations. In this regulatory context, the number of existing experimental data on logP is negligible compared to the number of chemicals for which it is necessary. There are many models to predict logP and we have selected a number of free programs to examine how they predict the logP of chemicals registered for REACH and to evaluate wheter they can be used in place of experimental data. Some results are good, especially if the information on the applicability domain of the models is considered, with R(2) values from 0.7 to 0.8 and root mean square error (RMSE) from 0.8 to 1.5. PMID:26432472

  1. Preparation of specific-yield logs for clastic bedrock aquifers

    USGS Publications Warehouse

    Robson, S.G.

    1995-01-01

    Specific yield is the principal aquifer characteristic needed to estimate the volume of recoverable ground water in storage in an aquifer. Determination of specific yield can be difficult and costly, particularly in deep, confined aquifers where core drilling and core analyses may be needed to define specific yield. A method has been developed for preparation of specific-yield geophysical logs that could greatly ease the determination of specific yields in such aquifers. Three geophysical logs that were investigated as potential indicators of specific yield were the free fluid index log, the effective-porosity log, and the apparent grain-density log. The free fluid index log did not accurately represent conditions at the test site in central Colorado and may not be suitable for application in other shallow and permeable aquifers. The effective-porosity and apparent grain-density logs were each used in least-squares linear regressions to correlate log response to specific yield measured in core samples. The resulting regression equations have coefficients of correlation (R) of 0.84 and 0.90, and were used to successfully prepare specific-yield logs from the effective-porosity and apparent grain-density logs.

  2. Assessment of geotechnical features of Miocene volcaniclastics using integrated logging

    SciTech Connect

    Toshiyuki, Kurahashi; Tomio, Inazaki; Yasuo, Nakamura

    1996-11-01

    This paper describes that integrated logging evaluates geotechnical conditions of fractures in Miocene volcaniclastics, where the damsites are for proposed. The purpose of this study was to detect fractures for seepage contols along borehole wall and characterize its geotechnical features by integrated logging. It is First step to evaluate the continuity and permeability of fractures. Integrated logging comprises of caliper, acoustic borehole televiewer, full-wave sonic, temperature, borehole video logging, natural gamma spectrum, and magnetic loggings. Natural gamma spectrum and magnetic logs would characterize litholofacies. Caliper, acoustic borehole televiewer and borehole video loggings would identify the depth, the dip and the azimuth of fractures. Besides temperature logging would determine the groudwater flow and suggest the permeable fracture. Integrated loggings were performed at damsites for proposed in northern Kanto district, middle part of Japan, where Miocene volcaniclastics are widely exposed. In Yunishigawa site, thermal jump was remarkably observed at 84 meters in depth from temperature logging. Its thermal gradient, differentiation of temperature, was 30 {degrees}C/m. The fracture causing it was recognized by the borehole enlargements from caliper logging, and had low slowness of full-wave sonic logging. Integrated logging enabled us to identify the fractures in the order of a dozen centimeters along a borehole wall. The identification would be useful for the geotechnical evaluation. Especially Differentiation of temperature revealed the fracture for seepage controls and classified the fractures into three types, which are (1) the permeable fracture circulating the runoff, (2) the permeable one controlling the groundwater from the deep, (3) the non-permeable fracture. As the first and the second are fractures for the seepage controls, they would involve the geotechnical problems.

  3. Estimating monthly streamflow values by cokriging

    USGS Publications Warehouse

    Solow, A.R.; Gorelick, S.M.

    1986-01-01

    Cokriging is applied to estimation of missing monthly streamflow values in three records from gaging stations in west central Virginia. Missing values are estimated from optimal consideration of the pattern of auto- and cross-correlation among standardized residual log-flow records. Investigation of the sensitivity of estimation to data configuration showed that when observations are available within two months of a missing value, estimation is improved by accounting for correlation. Concurrent and lag-one observations tend to screen the influence of other available observations. Three models of covariance structure in residual log-flow records are compared using cross-validation. Models differ in how much monthly variation they allow in covariance. Precision of estimation, reflected in mean squared error (MSE), proved to be insensitive to this choice. Cross-validation is suggested as a tool for choosing an inverse transformation when an initial nonlinear transformation is applied to flow values. ?? 1986 Plenum Publishing Corporation.

  4. Maximum likelihood borehole corrections for dual-detector density logs

    SciTech Connect

    Carlson, R.C.

    1993-10-01

    This report discusses Dual-detector density logs which have been used in the petroleum industry for years. The tool was designed with a second detector to allow compensation for the effect of a layer of mudcake between the tool and the formation being measured. The compensation algorithm commonly used calculates the correction to apply to the density measured by the long-spaced detector as proportional to the difference in the densities measured by the two detectors. The coefficient of proportionality is determined from experimental data taken with the tool in a fluid-filled hole of 15 to 40 cm diameter, with uniform thickness sheets of various materials simulating the mudcake. In applying this technology for the Containment program at the Department of Energy Nevada Test Site (NTS) we have discovered two problems. First, we frequently log in air-filled holes much larger than 40 cm. Second, the gap, or layer, is rarely uniform with depth or vertical position on the face of the tool. We have developed a method to determine the proper amount of correction dynamically. No experimental data on the gap effect are needed as long as the two detectors are calibrated to read the proper density when the gap is zero. The method assumes that the form of the equation used in the standard algorithm is correct, but uses the variation of the two density signals with depth to determine the appropriate value of the coefficient, assuming true density varies more slowly than the gap effects. This new, maximum likelihood, method appears to work better than the standard method in both fluid and air-filled holes where the borehole wall is rough and no mudcake is present. It cannot, however, correct for a uniform mudcake or air gap, and so complements but does not replace the standard method.

  5. Value Added

    ERIC Educational Resources Information Center

    Welch, Matt

    2004-01-01

    This article profiles retiring values teacher Gene Doxey and describes his foundational contributions to the students of California's Ramona Unified School District. Every one of the Ramona Unified School District's 7,200 students is eventually funneled through Doxey's Contemporary Issues class, a required rite of passage between elementary school…

  6. Valuing Conflict

    ERIC Educational Resources Information Center

    Hoerr, Thomas R.

    2004-01-01

    School leaders have a habit of minimizing disagreements among faculty and staff by capitalizing on the goals and values that everyone shares. When conflict rears its head at a meeting, it can be lessened by simply reminding colleagues of common purpose and finding issues on which all can agree. What started as an argument about curricular…

  7. Simulation Control Graphical User Interface Logging Report

    NASA Technical Reports Server (NTRS)

    Hewling, Karl B., Jr.

    2012-01-01

    One of the many tasks of my project was to revise the code of the Simulation Control Graphical User Interface (SIM GUI) to enable logging functionality to a file. I was also tasked with developing a script that directed the startup and initialization flow of the various LCS software components. This makes sure that a software component will not spin up until all the appropriate dependencies have been configured properly. Also I was able to assist hardware modelers in verifying the configuration of models after they have been upgraded to a new software version. I developed some code that analyzes the MDL files to determine if any error were generated due to the upgrade process. Another one of the projects assigned to me was supporting the End-to-End Hardware/Software Daily Tag-up meeting.

  8. Squirt flow influence on sonic log parameters

    NASA Astrophysics Data System (ADS)

    Markova, I.; Ronquillo Jarillo, G.; Markov, M.; Gurevich, B.

    2014-02-01

    Most sedimentary rocks contain movable fluid in the pores. Hydrodynamic effects due to wave-induced oscillatory fluid flow can lead to significant changes of velocities and attenuations of elastic waves in these rocks. In this paper, we consider the influence of a squirt flow (local flow between the pores of different compressibility) on the sonic log response. The calculations are performed using a unified model describing the joint influence of squirt flow and Biot's global flow. The results show that the influence of the squirt flow increases with increase of a signal frequency. This influence is relatively small in the case of the Stoneley wave but it is significant in the case of P and S waves.

  9. Geophysical well logging operations and log analysis in Geothermal Well Desert Peak No. B-23-1

    SciTech Connect

    Sethi, D.K.; Fertl, W.H.

    1980-03-01

    Geothermal Well Desert Peak No. B-23-1 was logged by Dresser Atlas during April/May 1979 to a total depth of 2939 m (9642 ft). A temperature of 209/sup 0/C (408/sup 0/F) was observed on the maximum thermometer run with one of the logging tools. Borehole tools rated to a maximum temperature of 204.4/sup 0/C (400/sup 0/F) were utilized for logging except for the Densilog tool, which was from the other set of borehole instruments, rated to a still higher temperature, i.e., 260/sup 0/C (500/sup 0/F). The quality of the logs recorded and the environmental effects on the log response have been considered. The log response in the unusual lithologies of igneous and metamorphic formations encountered in this well could be correlated with the drill cutting data. An empirical, statistical log interpretation approach has made it possible to obtain meaningful information on the rocks penetrated. Various crossplots/histograms of the corrected log data have been generated on the computer. These are found to provide good resolution between the lithological units in the rock sequence. The crossplotting techniques and the statistical approach were combined with the drill cutting descriptions in order to arrive at the lithological characteristics. The results of log analysis and recommendations for logging of future wells have been included.

  10. Geophysical borehole logging in the unsaturated zone, Yucca Mountain, Nevada

    SciTech Connect

    Schimschal, U.; Nelson, P.H.

    1991-05-01

    Borehole geophysical logging for site characterization in the volcanic rocks at the proposed nuclear waste repository at Yucca Mountain, Nevada, requires data collection under rather unusual conditions. Logging tools must operate in rugose, dry holes above the water table in the unsaturated zone. Not all logging tools will operate in this environment, therefore; careful consideration must be given to selection and calibration. A sample suite of logs is presented that demonstrates correlation of geological formations from borehole to borehole, the definition of zones of altered mineralogy, and the quantitative estimates of rock properties. We show the results of an exploratory calculation of porosity and water saturation based upon density and epithermal neutron logs. Comparison of the results with a few core samples is encouraging, particularly because the logs can provide continuous data in boreholes where core samples are not available. 9 refs., 4 figs.

  11. Color images of Kansas subsurface geology from well logs

    USGS Publications Warehouse

    Collins, D.R.; Doveton, J.H.

    1986-01-01

    Modern wireline log combinations give highly diagnostic information that goes beyond the basic shale content, pore volume, and fluid saturation of older logs. Pattern recognition of geology from logs is made conventionally through either the examination of log overlays or log crossplots. Both methods can be combined through the use of color as a medium of information by setting the three color primaries of blue, green, and red light as axes of three dimensional color space. Multiple log readings of zones are rendered as composite color mixtures which, when plotted sequentially with depth, show lithological successions in a striking manner. The method is extremely simple to program and display on a color monitor. Illustrative examples are described from the Kansas subsurface. ?? 1986.

  12. Western tight gas sands advanced logging workshop proceedings

    SciTech Connect

    Jennings, J B; Carroll, Jr, H B

    1982-04-01

    An advanced logging research program is one major aspect of the Western Tight Sands Program. Purpose of this workshop is to help BETC define critical logging needs for tight gas sands and to allow free interchange of ideas on all aspects of the current logging research program. Sixteen papers and abstracts are included together with discussions. Separate abstracts have been prepared for the 12 papers. (DLC)

  13. Static dictionaries on AC{sup 0} RAMs: Query time {Theta} ({radical}log n/log log n) is necessary and sufficient

    SciTech Connect

    Andersson, A.; Miltersen, P.B.; Riis, S.; Thorup, M.

    1996-12-31

    In this paper we consider solutions to the static dictionary problem on AC{sup 0} RAMs, i.e. random access machines where the only restriction on the finite instruction set is that all computational instructions are in AC{sup 0}. Our main result is a tight upper and lower bound of {Theta}({radical}log n/ log log n) on the time for answering membership queries in a set of size n when reasonable space is used for the data structure storing the set; the upper bound can be obtained using O(n) space, and the lower bound holds even if we allow space 2{sup polylog n}. Several variations of this result are also obtained Among others, we show a tradeoff between time and circuit depth under the unit-cost assumption: any RAM instruction set which permits a linear space, constant query time solution to the static dictionary problem must have an instruction of depth {Omega}(log w/ log log w), where w is the word size of the machine (and log the size of the universe). This matches the depth of multiplication and integer division, used in the perfect hashing scheme by Fredman, Komlos and Szemeredi.

  14. 7. William E. Barrett, Photographer, August 1975. LOG PONDS LOOKING ...

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

    7. William E. Barrett, Photographer, August 1975. LOG PONDS LOOKING WEST FROM POWERHOUSE ROOF. TRANSFORMER SHED IN FOREGROUND. - Meadow River Lumber Company, Highway 60, Rainelle, Greenbrier County, WV

  15. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...) AIRMEN FLIGHT SIMULATION TRAINING DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging... training, evaluation, or flight experience, and each person conducting the preflight inspection...

  16. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...) AIRMEN FLIGHT SIMULATION TRAINING DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging... training, evaluation, or flight experience, and each person conducting the preflight inspection...

  17. Logging and Fire Effects in Siberian Boreal Forests

    NASA Astrophysics Data System (ADS)

    Kukavskaya, E.; Buryak, L.; Ivanova, G.; Kalenskaya, O.; Bogorodskaya, A.; Zhila, S.; McRae, D.; Conard, S. G.

    2013-12-01

    The Russian boreal zone supports a huge terrestrial carbon pool. Moreover, it is a tremendous reservoir of wood products concentrated mainly in Siberia. The main natural disturbance in these forests is wildfire, which modifies the carbon budget and has potentially important climate feedbacks. In addition, both legal and illegal logging increase landscape complexity and fire hazard. We investigated a number of sites in different regions of Siberia to evaluate the impacts of fire and logging on fuel loads, carbon emissions, tree regeneration, soil respiration, and microbocenosis. We found large variations of fire and logging effects among regions depending on growing conditions and type of logging activity. Partial logging had no negative impact on forest conditions and carbon cycle. Illegal logging resulted in increase of fire hazard, and higher carbon emissions than legal logging. The highest fuel loads and carbon emissions were found on repeatedly burned unlogged sites where first fire resulted in total tree mortality. Repeated fires together with logging activities in drier conditions and on large burned sites resulted in insufficient regeneration, or even total lack of tree seedlings. Soil respiration was less on both burned and logged areas than in undisturbed forest. The highest structural and functional disturbances of the soil microbocenosis were observed on logged burned sites. Understanding current interactions between fire and logging is important for modeling ecosystem processes and for managers to develop strategies of sustainable forest management. Changing patterns in the harvest of wood products increase landscape complexity and can be expected to increase emissions and ecosystem damage from wildfires, inhibit recovery of natural ecosystems, and exacerbate impacts of wildland fire on changing climate and air quality. The research was supported by NASA LCLUC Program, RFBR grant # 12-04-31258, and Russian Academy of Sciences.

  18. log(MPl/m3/2)

    SciTech Connect

    Loaiza-Brito, Oscar; Martin, Johannes; Nilles, Hans Peter; Ratz, Michael

    2005-12-02

    Flux compactifications of string theory seem to require the presence of a fine-tuned constant in the superpotential. We discuss a scheme where this constant is replaced by a dynamical quantity which we argue to be a 'continuous Chern-Simons term'. In such a scheme, the gaugino condensate generates the hierarchically small scale of supersymmetry breakdown rather than adjusting its size to a constant. A crucial ingredient is the appearance of the hierarchically small quantity exp(-) which corresponds to the scale of gaugino condensation. Under rather general circumstances, this leads to a scenario of moduli stabilization, which is endowed with a hierarchy between the mass of the lightest modulus, the gravitino mass and the scale of the soft terms, mmodulus {approx} m3/2 {approx} 2 msoft. The 'little hierarchy' is given by the logarithm of the ratio of the Planck scale and the gravitino mass, {approx} log(MPl/m3/2) {approx} 4{pi}2. This exhibits a new mediation scheme of supersymmetry breakdown, called mirage mediation. We highlight the special properties of the scheme, and their consequences for phenomenology and cosmology.

  19. Efficient Preprocessing technique using Web log mining

    NASA Astrophysics Data System (ADS)

    Raiyani, Sheetal A.; jain, Shailendra

    2012-11-01

    Web Usage Mining can be described as the discovery and Analysis of user access pattern through mining of log files and associated data from a particular websites. No. of visitors interact daily with web sites around the world. enormous amount of data are being generated and these information could be very prize to the company in the field of accepting Customerís behaviors. In this paper a complete preprocessing style having data cleaning, user and session Identification activities to improve the quality of data. Efficient preprocessing technique one of the User Identification which is key issue in preprocessing technique phase is to identify the Unique web users. Traditional User Identification is based on the site structure, being supported by using some heuristic rules, for use of this reduced the efficiency of user identification solve this difficulty we introduced proposed Technique DUI (Distinct User Identification) based on IP address ,Agent and Session time ,Referred pages on desired session time. Which can be used in counter terrorism, fraud detection and detection of unusual access of secure data, as well as through detection of regular access behavior of users improve the overall designing and performance of upcoming access of preprocessing results.

  20. Log-Multiplicative Association Models as Item Response Models

    ERIC Educational Resources Information Center

    Anderson, Carolyn J.; Yu, Hsiu-Ting

    2007-01-01

    Log-multiplicative association (LMA) models, which are special cases of log-linear models, have interpretations in terms of latent continuous variables. Two theoretical derivations of LMA models based on item response theory (IRT) arguments are presented. First, we show that Anderson and colleagues (Anderson & Vermunt, 2000; Anderson & Bockenholt,…

  1. A RAPID METHOD FOR ESTIMATING LOG P FOR ORGANIC CHEMICALS

    EPA Science Inventory

    The logarithm of the retention time (log RT) of organic chemicals on a permanently bonded (C-18) reverse-phase high-pressure liquid chromatography system is shown to be linearly related to the logarithm of the n-octanol/water partition coefficient (log P). A rapid, inexpensive te...

  2. Adaptive Smoothing of the Log-Spectrum with Multiple Tapering

    E-print Network

    Adaptive Smoothing of the Log-Spectrum with Multiple Tapering K.S. Riedel and A. Sidorenko New periodogram. A data adaptive implementation of a variable bandwidth kernel smoother is given. 1 INTRODUCTION estimate is kernel smoothed to estimate the log-spectral density. In Section 5, we consider a data adaptive

  3. Real-Time System Log Monitoring/Analytics Framework

    SciTech Connect

    Oral, H Sarp; Dillow, David A; Park, Byung H; Shipman, Galen M; Geist, Al; Gunasekaran, Raghul

    2011-01-01

    Analyzing system logs provides useful insights for identifying system/application anomalies and helps in better usage of system resources. Nevertheless, it is simply not practical to scan through the raw log messages on a regular basis for large-scale systems. First, the sheer volume of unstructured log messages affects the readability, and secondly correlating the log messages to system events is a daunting task. These factors limit large-scale system logs primarily for generating alerts on known system events, and post-mortem diagnosis for identifying previously unknown system events that impacted the systems performance. In this paper, we describe a log monitoring framework that enables prompt analysis of system events in real-time. Our web-based framework provides a summarized view of console, netwatch, consumer, and apsched logs in real- time. The logs are parsed and processed to generate views of applications, message types, individual/group of compute nodes, and in sections of the compute platform. Also from past application runs we build a statistical profile of user/application characteristics with respect to known system events, recoverable/non-recoverable error messages and resources utilized. The web-based tool is being developed for Jaguar XT5 at the Oak Ridge Leadership Computing facility.

  4. 29 CFR 1401.32 - Logging of written requests.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    29 Labor 4 2013-07-01 2013-07-01 false Logging of written requests. 1401.32 Section 1401.32 Labor...INFORMATION Production or Disclosure of Information § 1401.32 Logging of written requests. (a) All requests for...

  5. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Aeronautics and Space 2 2011-01-01 2011-01-01 false Logging FSTD discrepancies. 60.20 Section 60.20 Aeronautics...DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging FSTD discrepancies. Each instructor, check airman,...

  6. VIEW OF DEBARKER FROM LOG INFEED DECK. NOTE ROOF SUPPORT ...

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

    VIEW OF DEBARKER FROM LOG IN-FEED DECK. NOTE ROOF SUPPORT OVER CARRIAGE AND LOG IN-FEED DECK IN UPPER RIGHT. (SEE OR-89-18 AND OR-89-23 FOR RELATED ARCHITECTURAL DETAILS.) - Hull-Oakes Lumber Company, 23837 Dawson Road, Monroe, Benton County, OR

  7. 29 CFR 1401.32 - Logging of written requests.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    29 Labor 4 2012-07-01 2012-07-01 false Logging of written requests. 1401.32 Section 1401.32 Labor...INFORMATION Production or Disclosure of Information § 1401.32 Logging of written requests. (a) All requests for...

  8. 22. VIEW OF DEBARKER FROM LOG INFEED DECK. NOTE ROOF ...

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

    22. VIEW OF DEBARKER FROM LOG IN-FEED DECK. NOTE ROOF SUPPORT OVER CARRIAGE AND LOG IN-FEED DECK IN UPPER RIGHT. (SEE OR-89-18 AND OR-89-23 FOR RELATED ARCHITECTURAL DETAILS.) - Hull-Oakes Lumber Company, 23837 Dawson Road, Monroe, Benton County, OR

  9. 29 CFR 1401.32 - Logging of written requests.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    29 Labor 4 2010-07-01 2010-07-01 false Logging of written requests. 1401.32 Section 1401.32 Labor...INFORMATION Production or Disclosure of Information § 1401.32 Logging of written requests. (a) All requests for...

  10. Data-Logging in Practical Science: Research and Reality.

    ERIC Educational Resources Information Center

    Newton, Leonard R.

    2000-01-01

    Surveys some of the benefits claimed for data-logging methods identified through research. Discusses findings from research that sought to explore the translation of these benefits into the real-world of science classrooms and identify the range of influences on science teachers adopting and developing data-logging methods. (SAH)

  11. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...Aeronautics and Space 2 2012-01-01 2012-01-01 false Logging FSTD discrepancies. 60.20 Section 60.20 Aeronautics...DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging FSTD discrepancies. Each instructor, check airman,...

  12. 6. Livestock barn (far left), log drafthorse barn (left of ...

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

    6. Livestock barn (far left), log draft-horse barn (left of center), loafing shed (center), log calving barn (right of center). View to west-northwest. - William & Lucina Bowe Ranch, County Road 44, 0.1 mile northeast of Big Hole River Bridge, Melrose, Silver Bow County, MT

  13. 29 CFR 1401.32 - Logging of written requests.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    29 Labor 4 2014-07-01 2014-07-01 false Logging of written requests. 1401.32 Section 1401.32 Labor...INFORMATION Production or Disclosure of Information § 1401.32 Logging of written requests. (a) All requests for...

  14. 29 CFR 1401.32 - Logging of written requests.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    29 Labor 4 2011-07-01 2011-07-01 false Logging of written requests. 1401.32 Section 1401.32 Labor...INFORMATION Production or Disclosure of Information § 1401.32 Logging of written requests. (a) All requests for...

  15. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Aeronautics and Space 2 2014-01-01 2014-01-01 false Logging FSTD discrepancies. 60.20 Section 60.20 Aeronautics...DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging FSTD discrepancies. Each instructor, check airman,...

  16. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Aeronautics and Space 2 2013-01-01 2013-01-01 false Logging FSTD discrepancies. 60.20 Section 60.20 Aeronautics...DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging FSTD discrepancies. Each instructor, check airman,...

  17. 14 CFR 60.20 - Logging FSTD discrepancies.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Aeronautics and Space 2 2010-01-01 2010-01-01 false Logging FSTD discrepancies. 60.20 Section 60.20 Aeronautics...DEVICE INITIAL AND CONTINUING QUALIFICATION AND USE § 60.20 Logging FSTD discrepancies. Each instructor, check airman,...

  18. Web Log Analysis: A Study of Instructor Evaluations Done Online

    ERIC Educational Resources Information Center

    Klassen, Kenneth J.; Smith, Wayne

    2004-01-01

    This paper focuses on developing a relatively simple method for analyzing web-logs. It also explores the challenges and benefits of web-log analysis. The study of student behavior on this site provides insights into website design and the effectiveness of this site in particular. Another benefit realized from the paper is the ease with which these…

  19. Ubiquitous Learning Project Using Life-Logging Technology in Japan

    ERIC Educational Resources Information Center

    Ogata, Hiroaki; Hou, Bin; Li, Mengmeng; Uosaki, Noriko; Mouri, Kosuke; Liu, Songran

    2014-01-01

    A Ubiquitous Learning Log (ULL) is defined as a digital record of what a learner has learned in daily life using ubiquitous computing technologies. In this paper, a project which developed a system called SCROLL (System for Capturing and Reusing Of Learning Log) is presented. The aim of developing SCROLL is to help learners record, organize,…

  20. 14 CFR 125.407 - Maintenance log: Airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Maintenance log: Airplanes. 125.407 Section... OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6... Maintenance log: Airplanes. (a) Each person who takes corrective action or defers action concerning a...

  1. 14 CFR 125.407 - Maintenance log: Airplanes.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Maintenance log: Airplanes. 125.407 Section... OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6... Maintenance log: Airplanes. (a) Each person who takes corrective action or defers action concerning a...

  2. 14 CFR 125.407 - Maintenance log: Airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Maintenance log: Airplanes. 125.407 Section... OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6... Maintenance log: Airplanes. (a) Each person who takes corrective action or defers action concerning a...

  3. 14 CFR 125.407 - Maintenance log: Airplanes.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Maintenance log: Airplanes. 125.407 Section... OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6... Maintenance log: Airplanes. (a) Each person who takes corrective action or defers action concerning a...

  4. 14 CFR 125.407 - Maintenance log: Airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Maintenance log: Airplanes. 125.407 Section... OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6... Maintenance log: Airplanes. (a) Each person who takes corrective action or defers action concerning a...

  5. 46 CFR 148.100 - Log book entries.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 5 2014-10-01 2014-10-01 false Log book entries. 148.100 Section 148.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DANGEROUS CARGOES CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING Minimum Transportation Requirements § 148.100 Log book entries....

  6. 46 CFR 148.100 - Log book entries.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 5 2011-10-01 2011-10-01 false Log book entries. 148.100 Section 148.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DANGEROUS CARGOES CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING Minimum Transportation Requirements § 148.100 Log book entries....

  7. 46 CFR 148.100 - Log book entries.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 5 2013-10-01 2013-10-01 false Log book entries. 148.100 Section 148.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DANGEROUS CARGOES CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING Minimum Transportation Requirements § 148.100 Log book entries....

  8. 46 CFR 148.100 - Log book entries.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 5 2012-10-01 2012-10-01 false Log book entries. 148.100 Section 148.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) DANGEROUS CARGOES CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING Minimum Transportation Requirements § 148.100 Log book entries....

  9. 6. View to north along dirt lane. Log shed (HABS ...

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

    6. View to north along dirt lane. Log shed (HABS No. VA-1290-N) at left, log dogtrot tenant house (HABS No. VA-1290-Q) in distance at end of lane. - Edgewood Farm, West side of State Route 600, .8 mile north of State Route 778, Clover, Halifax County, VA

  10. Preprocessing and Mining Web Log Data for Web Personalization

    E-print Network

    Ruggieri, Salvatore

    Preprocessing and Mining Web Log Data for Web Personalization M. Baglioni1 , U. Ferrara2 , A. Romei/26, 56017 S. Martino Ulmiano (PI) Italy ferrara@ksolutions.it Abstract. We describe the web usage mining behaviour of a web site users. The models are inferred from the access logs of a web server by means of data

  11. Verification of Logs -Revealing Faulty Processes of a Medical Laboratory

    E-print Network

    Desel, Jörg

    of information systems are used in the healthcare sector and each system produces some kind of log-data have to be stored. This "good laboratory practice" is an important method of quality management and big faulty processes given in log-files of a medical laboratory. The files contain data recorded over

  12. Audit Log Analysis Using the Visual Audit Browser Toolkit

    E-print Network

    Yoo, S. J. Ben

    Audit Log Analysis Using the Visual Audit Browser Toolkit James Hoagland, Christopher Wee, and Karl #12; Abstract This paper describes the design and implementation of the Visual Audit Browser (VAB) Toolkit, which provides a visual interface for browsing Sun BSM audit logs. Applica­ tions of the VAB

  13. Audit Log Analysis Using the Visual Audit Browser Toolkit

    E-print Network

    California at Davis, University of

    Audit Log Analysis Using the Visual Audit Browser Toolkit James Hoagland, Christopher Wee, and Karl #12;Abstract This paper describes the design and implementation of the Visual Audit Browser (VAB) Toolkit, which provides a visual interface for browsing Sun BSM audit logs. Applica- tions of the VAB

  14. Dependencies between Shape Parameters in Random Log-Trees

    E-print Network

    Fuchs, Michael

    Dependencies between Shape Parameters in Random Log-Trees (joint with H.-H. Chern, H.-K. Hwang, Taiwan Chennai, July 10, 2015 Michael Fuchs (NCTU) Dependencies in Log-Trees Chennai, July 10, 2015 1 / 31 #12;Random Trees Random Trees Theory Applications Combinatorial Probabilistical Analytical

  15. Design and Use of the Stratigraphic Strip Log.

    ERIC Educational Resources Information Center

    Fichter, Lynn Stanton

    1987-01-01

    Discusses the use of a strip log as a diagrammatic representation of the information available in a sequence of sedimentary rocks. Describes the design of the strip log (both symbolically and by visual/spatial patterns) and some of the possible interpretations that can be made using them. (TW)

  16. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  17. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  18. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  19. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  20. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  1. Prediction of Log "P": ALOGPS Application in Medicinal Chemistry Education

    ERIC Educational Resources Information Center

    Kujawski, Jacek; Bernard, Marek K.; Janusz, Anna; Kuzma, Weronika

    2012-01-01

    Molecular hydrophobicity (lipophilicity), usually quantified as log "P" where "P" is the partition coefficient, is an important molecular characteristic in medicinal chemistry and drug design. The log "P" coefficient is one of the principal parameters for the estimation of lipophilicity of chemical compounds and pharmacokinetic properties. The…

  2. Vol. 42, No. 3 December 1998 Mariners Weather Log

    E-print Network

    Vol. 42, No. 3 December 1998 Mariners Weather Log The USS REGULUS, a U.S. Navy ship, aground). This incident initiated the requirement for assistance in severe weather port decision-making as described in the article by Sam Brand, page 4. Photograph courtesy of the U.S. Navy. #12;2 Mariners Weather Log From

  3. Sorption of four hydrophobic organic contaminants by biochars derived from maize straw, wood dust and swine manure at different pyrolytic temperatures.

    PubMed

    Wang, Ziying; Han, Lanfang; Sun, Ke; Jin, Jie; Ro, Kyoung S; Libra, Judy A; Liu, Xitao; Xing, Baoshan

    2016-02-01

    Sorption behavior of acetochlor (ACE), dibutyl phthalate (DBP), 17?-Ethynyl estradiol (EE2) and phenanthrene (PHE) with biochars produced from three feedstocks (maize straw (MABs), pine wood dust (WDBs) and swine manure (SWBs)) at seven heat treatment temperatures (HTTs) was evaluated. The bulk polarity of these biochars declined with increasing HTT while the aromaticity and CO2-surface area (CO2-SA) rose. The surface OC contents of biochars were generally higher than bulk OC contents. The organic carbon (OC)-normalized CO2-SA (CO2-SA/OC) of biochars significantly correlated with the sorption coefficients (n and logKoc), suggesting that pore filling could dominate the sorption of tested sorbates. SWBs had higher logKoc values compared to MABs and WDBs, due to their higher ash contents. Additionally, the logKoc values for MABs was relatively greater than that for WDBs at low HTTs (?400 °C), probably resulting from the higher CO2-SA/OC, ash contents and aromaticity of MABs. Surface polarity and the aliphatic C may dominate the sorption of WDBs obtained at relatively low HTTs (?400 °C), while aromatic C affects the sorption of biochars at high HTTs. Results of this work aid to deepen our understanding of the sorption mechanisms, which is pivotal to wise utilization of biochars as sorbents for hazardous organic compounds. PMID:26364218

  4. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of once every 5 seconds. (d) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging...

  5. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of once every 5 seconds. (d) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging...

  6. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of once every 5 seconds. (d) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging...

  7. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... records the analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of rate... torque, collected during the sampling period. (e) Determine the final value for CO2, CO, HC, and...

  8. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... records the analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of rate... torque, collected during the sampling period. (e) Determine the final value for CO2, CO, HC, and...

  9. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... requirements of this subpart. (b) Determine from the data collection records the analyzer responses...) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging the concentration of...

  10. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... records the analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of rate... torque, collected during the sampling period. (e) Determine the final value for CO2, CO, HC, and...

  11. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... records the analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of rate... torque, collected during the sampling period. (e) Determine the final value for CO2, CO, HC, and...

  12. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... requirements of this subpart. (b) Determine from the data collection records the analyzer responses...) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging the concentration of...

  13. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... requirements of this subpart. (b) Determine from the data collection records the analyzer responses...) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging the concentration of...

  14. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of once every 5 seconds. (d) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging...

  15. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... requirements of this subpart. (b) Determine from the data collection records the analyzer responses...) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging the concentration of...

  16. 40 CFR 90.412 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... records the analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of rate... torque, collected during the sampling period. (e) Determine the final value for CO2, CO, HC, and...

  17. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... analyzer responses corresponding to the end of each mode. (c) Record data at a minimum of once every 5 seconds. (d) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging...

  18. 40 CFR 91.412 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... requirements of this subpart. (b) Determine from the data collection records the analyzer responses...) Determine the final value for CO2, CO, HC, and NOX concentrations by averaging the concentration of...

  19. Coal log pipeline research at the University of Missouri

    SciTech Connect

    Liu, H.

    1992-03-01

    Project tasks: Perform the necessary testing and development to demonstrate that the amount of binder in coal logs can be reduced to 8% or lower to produce logs with adequate strength to eliminate breakage during pipeline transportation, under conditions experienced in long distance pipeline systems. Prior to conducting any testing and demonstration, grantee shall perform an information search and make full determination of all previous attempts to extrude or briquette coal, upon which the testing and demonstration shall be based. Perform the necessary development to demonstrate a small model of the most promising injection system for coal-logs, and test the logs produced from Task 1. Conduct economic analysis of coal-log pipeline, based upon the work to date. Refine and complete the economic model. Prepare a final report for DOE.

  20. Raster images offer low-cost well log preservation

    SciTech Connect

    Cisco, S.L.

    1996-12-16

    Well log data saved as depth-calibrated raster images provide an economic alternative to digital formats for preserving this valuable information into the future. Although often thrown away after vectorization, raster imaged well logs may be the key for a global computer-readable format for legacy hardcopy data. Over the past several decades, oil and gas companies have acquired an enormous volume of well logs, maps, and seismic and core data. Preservation of, and access to, valuable data such as well logs is critical to the petroleum industry. These legacy data are stored on multiple media and contain information for a variety of applications in addition to resource exploration and development, such as environmental protection, water management, global change studies, and basic and applied research. The paper discusses well logs, acquisition cost, storage requirements, ease of use, costs and benefits.

  1. Heimdal monitoring. 1: Establishing feasibility from cores and logs

    SciTech Connect

    Jizba, D.L.; Marion, D.P.

    1994-12-31

    This paper presents a method that uses core and log measurements to quantify the influence of saturation changes on elastic properties at core, log, and seismic scales in order to investigate the feasibility of using seismic measurements to monitor gas production on the Heimdal North Sea field. In the first part, laboratory measurements of P- and S-wave velocities, porosity, density, and mineralogy are used to determined the influence of partial saturation on elastic parameters. These measurement are compared with theoretical predictions using Gassmann`s model. Second, the authors invert from logs, the rock parameters that are necessary to simulate the impact of water rise on elastic properties at log scale. Third, the well logs are modelled at seismic scales of resolution and are used to identify the effect of fluid movement on the seismic response. Finally, the results are compared to repetitive seismic measurements.

  2. True Random Number Generators Mario Stipcevic and Cetin Kaya Koc

    E-print Network

    to control local quantum RNGs exploiting a design flaw of two commercial quantum cryptographic systems quantum systems. On the other hand, current industry standards dictate the use of RNGs based on free of quantum RNGs. In this chapter we compare weak and strong aspects of the two approaches. Fi- nally, we

  3. Name log P-value Motif AP-1 -1.445e4

    E-print Network

    sequence set comprising regions +/- 5kb flanking each FAIRE site. #12;FOXA1 CHR 0HR 12HR 36HR ALL DIFF GATA sampled throughout the genome (dashed lines, 10x more sites than those in group). The FAIRE signal the signal from background (or random). A B C D #12;Known Transformation Regulated Known STAT3 Regulated

  4. Determination of Log K[subscript ow] Values for Four Drugs

    ERIC Educational Resources Information Center

    Harris, Mark F.; Logan, Jennifer L.

    2014-01-01

    Though many undergraduates are interested in medicine, relatively few experiments related to drug design and development are included in introductory chemistry laboratory courses. In this experiment, aqueous solutions of four different drugs (acetaminophen, caffeine, phenacetin, and sulfanilamide) are extracted using 1-octanol, a mimic of the…

  5. Determination of soil–water sorption coefficients of volatile methylsiloxanes

    PubMed Central

    Kozerski, Gary E; Xu, Shihe; Miller, Julie; Durham, Jeremy

    2014-01-01

    The sorption behaviors of 4 cyclic and linear volatile methyl siloxane (VMS) compounds between water and organic matter in 3 United Kingdom soils were studied by a batch equilibrium method using13C-enriched sorbates. Sorption and desorption kinetics and isotherms were determined for octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), octamethyltrisiloxane (L3), and decamethyltetrasiloxane (L4). Concentrations of [13C]-VMS in the soil and aqueous phases were measured directly by extraction and gas chromatography–mass spectrometry techniques. All VMS compounds were sorbed rapidly, reaching constant distributions in all soils by 24?h. Desorption kinetics were very rapid, with reattainment of equilibrium within 1?h. In the main, linear isotherms were observed for aqueous concentrations at or below 4% of the solubility limits. The average sorption organic carbon partition coefficient (log?KOC) values across soils were 4.23 for D4, 5.17 for D5, 4.32 for L3, and 5.13 for L4, with standard deviations of 0.09 to 0.34. Desorption KOC values were systematically greater by 0.1 log units to 0.3 log units. The linear isotherms and low variation in KOC values across soils suggested partitioning-dominated sorption of the VMS. Compared with traditional hydrophobic organic compounds, KOC values for the VMS compounds were significantly lower than expected on the basis of their octanol–water partition coefficients. A linear free energy relationship analysis showed that these differences could be rationalized quantitatively in terms of the inherent characteristics of the VMS compounds, combined with the differences in solvation properties of organic matter and octanol. Environ Toxicol Chem 2014; 33:1937–1945. PMID:24862578

  6. Biosorption of phenanthrene by pure algae and field-collected planktons and their fractions.

    PubMed

    Zhang, Dainan; Ran, Chenyang; Yang, Yu; Ran, Yong

    2013-09-01

    The biosorption isotherms for phenanthrene (Phen) by cultured algae, field-collected plankton, and market algae samples (OSs) and their fractions (lipid-LP, lipid free carbon-LF, alkaline nonhydrolyzable carbon-ANHC, and acid nonhydrolyzable carbon-NHC) were established. All the biosorption isotherms are well fitted by the Freundlich model. The biosorption isotherms for the ANHC and NHC fractions are nonlinear and for the other fractions are linear. It was found that the NHC fractions are chemically and structurally different from other fractions by using elemental analysis and Fourier transformed infrared spectroscopy (FTIR), consisting mainly of aliphatic polymethylene carbon. The average KOC values for Phen at Ce=0.005Sw are 10706±2768mLg(-1) and 95843±55817mLg(-1) for the bulk market algal samples and their NHC isolates, respectively. As the NHC fraction for Porphyra contains higher polymethylene carbon than that for Seaweed or Spirulina, it exhibits higher biosorption capacity. Moreover, the logKOC values are significantly higher for the field-collected samples than for the market algae and cultured algae samples. The multivariate correlation shows that the logKOC values are positively related to the LP contents, and negatively to the C/N ratios for the original algal samples. Furthermore, the logKOC values are negatively related to the polarity indices (O/C and O+N/C) for the original samples and their fractions excluding LP fractions. These observations help to understand the role of polarity, LP and NHC fractions, and aliphatic structures in the biosorption of Phen, which requires more attention in the examination of sorption processes in the natural environment. PMID:23714149

  7. Downhole Log Assessment of Gas Hydrate and Free-Gas Concentrations on Hydrate Ridge

    NASA Astrophysics Data System (ADS)

    Collett, T. S.; Goldberg, D. S.; Janik, A.; Guerin, G.

    2003-12-01

    The downhole-logging program on ODP Leg 204 was designed to assess the occurrence and concentration of gas hydrates on Hydrate Ridge. Logging while drilling (LWD) tools were deployed at eight (Site 1244-1150) of the nine sites drilled on southern Hydrate Ridge. LWD tools measure in-situ formation properties with instruments located in the drill collars immediately above the drill bit. The LWD tools used during Leg 204 included the resistivity-at-the-bit (RAB-GVR) tool, the magnetic resonance while drilling (MRWD) tool, and the azimuthal density-neutron (VDN) tool. The downhole log inferred distribution of gas hydrate beneath Hydrate Ridge and the adjacent slope basin is heterogeneous, with downhole RAB images showing gas hydrate occupying fractures and occurring as a disseminated pore-filling material within flat lying stratigraphic units with thicknesses varying from several centimeters to as much as 10 m. It has been shown that it is possible to obtain gas-hydrate saturations (percent of pore space occupied by gas hydrate) by using the Archie relation to analyze the electrical resistivity of gas-hydrate-bearing sediments. In this study, the Archie relation was used with resistivity data from the GVR tool and porosity data from the VDN density tool to calculate water saturations at all eight LWD log sites on Hydrate Ridge. The Archie relation yielded water saturations ranging from low values near the crest of the ridge, of about 10% in Hole 1249A, to a more common value of about 90% along the flanks of the ridge. It is generally accepted that with the zone of gas hydrate stability, gas hydrate saturations (Sh) are the mathematical complement of Archie derived water saturations (Sw), with Sh=1-Sw. Thus, the Archie derived gas hydrate saturations at the crest of the ridge exceed 90%. It should be noted that the Archie relation cannot distinguish between the occurrence of free-gas and gas hydrate. But, density, neutron, and NMR log derived porosity data can be used to differentiate gas-hydrate from free-gas-bearing sediments. At Site 1249, the density and neutron log-derived porosities are generally higher than the core-derived porosities. However, the NMR porosities are lower than the core-derived porosities. The apparent increase in density and neutron log derived porosities can be attributed to the occurrence of gas hydrate, as can the apparent decrease in NMR porosities. The affect of gas hydrate on density and neutron-derived porosities is relatively small. But NMR porosities are more significantly affected by the presence of gas hydrate. Neutron porosity logs are also affected by the presence of free-gas (yielding apparent low porosity measurements), but the downhole neutron porosity logs did not reveal the presence of any free-gas above the depth of the BSR on Hydrate Ridge. However, the combined Archie and porosity log analysis did reveal the occurrence of free-gas below the BSR on Hydrate Ridge, with free-gas saturations exceeding 50% in the "Horizon A" turbidite sequence.

  8. Rendering log aesthetic curves via Runge-Kutta method

    NASA Astrophysics Data System (ADS)

    Gobithaasan, R. U.; Meng, T. Y.; Piah, A. R. M.; Miura, K. T.

    2014-07-01

    Log Aesthetic Curves (LAC) are visually pleasing curves which has been developed using monotonic curvature profile. Hence, it can be easily implemented in product design environment, e.g, Rhino 3D CAD systems. LAC is generally represented in an integral form of its turning angle. Traditionally, Gaussian-Kronrod method has been used to render this curve which consumes less than one second for a given interval. Recently, Incomplete Gamma Function was proposed to represent LAC analytically which decreases the computation time up to 13 times. However, only certain value of shape parameters (denoted as ?) which dictates the types of curves generated for LAC, can be used to compute LAC. In this paper, the classical Runge-Kutta (RK4) method is proposed to evaluate LAC numerically to reduce the LAC computation time for arbitrary, ?. The preliminary result looks promising where the evaluation time is decreased tremendously. This paper also demonstrates the accuracy control of LAC by reducing the stepsize of RK4. The computation time and the accuracy for various ?, are also illustrated in the last section of this paper.

  9. BAF and FI-BAF: Efficient and Publicly Verifiable Cryptographic Schemes for Secure Logging in Resource-Constrained Systems

    E-print Network

    Ning, Peng

    systems due to their forensic value. Protecting audit logs on a physically unprotected machine in hostile as Yavuz and Ning [2009a]. This work was supported by the U.S. National Science Foundation (NSF) under grants CAREER-0447761 and 0910767, and the U.S. Army Research Office (ARO) under grant W911NF-08

  10. 78 FR 44957 - Agency Information Collection Activities: BioWatch Filter Holder Log, Filter Holder Log DHS Form...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-25

    ... Final Rule; FR citation: 67 FR 76908 and the CDC Interim Final Rule 42 CFR Part 73 Possession, Use, and Transfer of Select Agents and Toxins; Interim Final Rule; FR citation: 67 FR 76886, inter alia. Information... SECURITY Agency Information Collection Activities: BioWatch Filter Holder Log, Filter Holder Log DHS...

  11. Valuing vaccination

    PubMed Central

    Bärnighausen, Till; Bloom, David E.; Cafiero-Fonseca, Elizabeth T.; O’Brien, Jennifer Carroll

    2014-01-01

    Vaccination has led to remarkable health gains over the last century. However, large coverage gaps remain, which will require significant financial resources and political will to address. In recent years, a compelling line of inquiry has established the economic benefits of health, at both the individual and aggregate levels. Most existing economic evaluations of particular health interventions fail to account for this new research, leading to potentially sizable undervaluation of those interventions. In line with this new research, we set forth a framework for conceptualizing the full benefits of vaccination, including avoided medical care costs, outcome-related productivity gains, behavior-related productivity gains, community health externalities, community economic externalities, and the value of risk reduction and pure health gains. We also review literature highlighting the magnitude of these sources of benefit for different vaccinations. Finally, we outline the steps that need to be taken to implement a broad-approach economic evaluation and discuss the implications of this work for research, policy, and resource allocation for vaccine development and delivery. PMID:25136129

  12. Influence of logging on the effects of wildfire in Siberia

    NASA Astrophysics Data System (ADS)

    Kukavskaya, E. A.; Buryak, L. V.; Ivanova, G. A.; Conard, S. G.; Kalenskaya, O. P.; Zhila, S. V.; McRae, D. J.

    2013-12-01

    The Russian boreal zone supports a huge terrestrial carbon pool. Moreover, it is a tremendous reservoir of wood products concentrated mainly in Siberia. The main natural disturbance in these forests is wildfire, which modifies the carbon budget and has potentially important climate feedbacks. In addition, both legal and illegal logging increase landscape complexity and affect burning conditions and fuel consumption. We investigated 100 individual sites with different histories of logging and fire on a total of 23 study areas in three different regions of Siberia to evaluate the impacts of fire and logging on fuel loads, carbon emissions, and tree regeneration in pine and larch forests. We found large variations of fire and logging effects among regions depending on growing conditions and type of logging activity. Logged areas in the Angara region had the highest surface and ground fuel loads (up to 135 t ha-1), mainly due to logging debris. This resulted in high carbon emissions where fires occurred on logged sites (up to 41 tC ha-1). The Shushenskoe/Minusinsk and Zabaikal regions are characterized by better slash removal and a smaller amount of carbon emitted to the atmosphere during fires. Illegal logging, which is widespread in the Zabaikal region, resulted in an increase in fire hazard and higher carbon emissions than legal logging. The highest fuel loads (on average 108 t ha-1) and carbon emissions (18-28 tC ha-1) in the Zabaikal region are on repeatedly burned unlogged sites where trees fell on the ground following the first fire event. Partial logging in the Shushenskoe/Minusinsk region has insufficient impact on stand density, tree mortality, and other forest conditions to substantially increase fire hazard or affect carbon stocks. Repeated fires on logged sites resulted in insufficient tree regeneration and transformation of forest to grasslands. We conclude that negative impacts of fire and logging on air quality, the carbon cycle, and ecosystem sustainability could be decreased by better slash removal in the Angara region, removal of trees killed by fire in the Zabaikal region, and tree planting after fires in drier conditions where natural regeneration is hampered by soil overheating and grass proliferation.

  13. Extracting the Textual and Temporal Structure of Supercomputing Logs

    SciTech Connect

    Jain, S; Singh, I; Chandra, A; Zhang, Z; Bronevetsky, G

    2009-05-26

    Supercomputers are prone to frequent faults that adversely affect their performance, reliability and functionality. System logs collected on these systems are a valuable resource of information about their operational status and health. However, their massive size, complexity, and lack of standard format makes it difficult to automatically extract information that can be used to improve system management. In this work we propose a novel method to succinctly represent the contents of supercomputing logs, by using textual clustering to automatically find the syntactic structures of log messages. This information is used to automatically classify messages into semantic groups via an online clustering algorithm. Further, we describe a methodology for using the temporal proximity between groups of log messages to identify correlated events in the system. We apply our proposed methods to two large, publicly available supercomputing logs and show that our technique features nearly perfect accuracy for online log-classification and extracts meaningful structural and temporal message patterns that can be used to improve the accuracy of other log analysis techniques.

  14. Calibration of NMR well logs from carbonate reservoirs with laboratory NMR measurements and ?XRCT

    SciTech Connect

    Mason, Harris E.; Smith, Megan M.; Hao, Yue; Carroll, Susan A.

    2014-12-31

    The use of nuclear magnetic resonance (NMR) well log data has the potential to provide in-situ porosity, pore size distributions, and permeability of target carbonate CO? storage reservoirs. However, these methods which have been successfully applied to sandstones have yet to be completely validated for carbonate reservoirs. Here, we have taken an approach to validate NMR measurements of carbonate rock cores with independent measurements of permeability and pore surface area to volume (S/V) distributions using differential pressure measurements and micro X-ray computed tomography (?XRCT) imaging methods, respectively. We observe that using standard methods for determining permeability from NMR data incorrectly predicts these values by orders of magnitude. However, we do observe promise that NMR measurements provide reasonable estimates of pore S/V distributions, and with further independent measurements of the carbonate rock properties that universally applicable relationships between NMR measured properties may be developed for in-situ well logging applications of carbonate reservoirs.

  15. The Interlacing Log-concavity of the Boros-Moll Polynomials William Y. C. Chen1

    E-print Network

    Chen, Bill

    The Interlacing Log-concavity of the Boros-Moll Polynomials William Y. C. Chen1 , Larry X. W. Wang2 themselves. We show that the Boros-Moll polynomi- als are interlacingly log-concave. Furthermore, we give polynomials are interlacingly log-concave. Keywords: interlacing log-concavity, log-concavity, the Boros

  16. Log2: A Cost-Aware Logging Mechanism for Performance Diagnosis Rui Ding1, Hucheng Zhou1, Jian-Guang Lou1, Hongyu Zhang1, Qingwei Lin1,

    E-print Network

    Xie, Tao

    Log2: A Cost-Aware Logging Mechanism for Performance Diagnosis Rui Ding1, Hucheng Zhou1, Jian 3University of Illinois at Urbana-Champaign Abstract Logging has been a common practice for monitoring and diagnosing performance issues. However, logging comes at a cost, especially for large

  17. Figure 1. Literature-derived data on accumulation of As by earthworms. A) log-log scatterplot of As concentration in soil versus As concentration in depurated

    E-print Network

    Pennycook, Steve

    114 FIGURES #12;115 Figure 1. Literature-derived data on accumulation of As by earthworms. A) log-log scatterplot of As concentration in soil versus As concentration in depurated earthworms. Line represents by earthworms. A) log-log scatterplot of Cd concentration in soil versus Cd concentration in depurated

  18. Geothermal well log interpretation state of the art. Final report

    SciTech Connect

    Sanyal, S.K.; Wells, L.E.; Bickham, R.E.

    1980-01-01

    An in-depth study of the state of the art in Geothermal Well Log Interpretation has been made encompassing case histories, technical papers, computerized literature searches, and actual processing of geothermal wells from New Mexico, Idaho, and California. A classification scheme of geothermal reservoir types was defined which distinguishes fluid phase and temperature, lithology, geologic province, pore geometry, salinity, and fluid chemistry. Major deficiencies of Geothermal Well Log Interpretation are defined and discussed with recommendations of possible solutions or research for solutions. The Geothermal Well Log Interpretation study and report has concentrated primarily on Western US reservoirs. Geopressured geothermal reservoirs are not considered.

  19. Fluid-temperature logs for selected wells in eastern Washington

    SciTech Connect

    Stoffel, K.L.; Widness, S.

    1983-12-01

    This Open-File Report consists of fluid temperature logs compiled during studies of the geohydrology and low temperature geothermal resources of eastern Washington. The fluid temperature logs are divided into two groups. Part A consists of wells which are concentrated in the Moses Lake-Ritzville-Connell area. Full geophysical log suites for many of these wells are presented in Stoffel and Widness (1983) and discussed in Widness (1983, 1984). Part B consists of wells outside of the Moses Lake-Ritzville-Connell study area.

  20. 2-Log-concavity of the Boros-Moll Polynomials

    E-print Network

    Chen, William Y C

    2010-01-01

    The Boros-Moll polynomials $P_m(a)$ arise in the evaluation of a quartic integral. It has been conjectured by Boros and Moll that these polynomials are infinitely log-concave. In this paper, we show that $P_m(a)$ is 2-log-concave for any $m\\geq 2$. Let $d_i(m)$ be the coefficient of $a^i$ in $P_m(a)$. We also show that the sequence $\\{i (i+1)(d_i^{\\,2}(m)-d_{i-1}(m)d_{i+1}(m))\\}_{1\\leq i \\leq m}$ is log-concave. This leads another proof of Moll's minimum conjecture.

  1. Project to transcribe old ship logs provides important weather data

    NASA Astrophysics Data System (ADS)

    Showstack, Randy

    2012-11-01

    Kathy Wendolkowski is a citizen scientist. It's a term that Wendolkowski considers far too lofty for what she claims is simply a happy addiction that she and others have for transcribing old logs from naval ship and other vessels. They perform this task to glean the regularly recorded weather data from those logs for the benefit of science. For Wendolkowski, though, greater satisfaction comes from reading what the logs also reveal about the daily lives of the sailors as well as any accompanying historical drama.

  2. Lithological control on gas hydrate saturation as revealed by signal classification of NMR logging data

    NASA Astrophysics Data System (ADS)

    Bauer, Klaus; Kulenkampff, Johannes; Henninges, Jan; Spangenberg, Erik

    2015-09-01

    In this paper, nuclear magnetic resonance (NMR) downhole logging data are analyzed with a new strategy to study gas hydrate-bearing sediments in the Mackenzie Delta (NW Canada). In NMR logging, transverse relaxation time (T2) distribution curves are usually used to determine single-valued parameters such as apparent total porosity or hydrocarbon saturation. Our approach analyzes the entire T2 distribution curves as quasi-continuous signals to characterize the rock formation. We apply self-organizing maps, a neural network clustering technique, to subdivide the data set of NMR curves into classes with a similar and distinctive signal shape. The method includes (1) preparation of data vectors, (2) unsupervised learning, (3) cluster definition, and (4) classification and depth mapping of all NMR signals. Each signal class thus represents a specific pore size distribution which can be interpreted in terms of distinct lithologies and reservoir types. A key step in the interpretation strategy is to reconcile the NMR classes with other log data not considered in the clustering analysis, such as gamma ray, hydrate saturation, and other logs. Our results defined six main lithologies within the target zone. Gas hydrate layers were recognized by their low signal amplitudes for all relaxation times. Most importantly, two subtypes of hydrate-bearing shaly sands were identified. They show distinct NMR signals and differ in hydrate saturation and gamma ray values. An inverse linear relationship between hydrate saturation and clay content was concluded. Finally, we infer that the gas hydrate is not grain coating, but rather, pore filling with matrix support is the preferred growth habit model for the studied formation.

  3. Evaluation of sewage sludge and slow pyrolyzed sewage sludge-derived biochar for adsorption of phenanthrene and pyrene.

    PubMed

    Zieli?ska, Anna; Oleszczuk, Patryk

    2015-09-01

    The present study investigated the sorption of phenanthrene (PHE) and pyrene (PYR) by sewage sludges and sewage sludge-derived biochars. The organic carbon normalized distribution coefficient (log K(OC) for C(w) = 0.01 S(w)) for the sewage sludges ranged from 5.62 L kg(-1) to 5.64 L kg(-1) for PHE and from 5.72 L kg(-1) to 5.75 L kg(-1) for PYR. The conversion of sewage sludges into biochar significantly increased their sorption capacity. The value of log K(OC) for the biochars ranged from 5.54 L kg(-1) to 6.23 L kg(-1) for PHE and from 5.95 L kg(-1) to 6.52 L kg(-1) for PYR depending on temperature of pyrolysis. The dominant process was monolayer adsorption in the micropores and/or multilayer surface adsorption (in the mesopores), which was indicated by the significant correlations between log K(OC) and surface properties of biochars. PYR was sorbed better on the tested materials than PHE. PMID:26093256

  4. New Insights into the Consequences of Post-Windthrow Salvage Logging Revealed by Functional Structure of Saproxylic Beetles Assemblages

    PubMed Central

    Thorn, Simon; Bässler, Claus; Gottschalk, Thomas; Hothorn, Torsten; Bussler, Heinz; Raffa, Kenneth; Müller, Jörg

    2014-01-01

    Windstorms, bark beetle outbreaks and fires are important natural disturbances in coniferous forests worldwide. Wind-thrown trees promote biodiversity and restoration within production forests, but also cause large economic losses due to bark beetle infestation and accelerated fungal decomposition. Such damaged trees are often removed by salvage logging, which leads to decreased biodiversity and thus increasingly evokes discussions between economists and ecologists about appropriate strategies. To reveal the reasons behind species loss after salvage logging, we used a functional approach based on four habitat-related ecological traits and focused on saproxylic beetles. We predicted that salvage logging would decrease functional diversity (measured as effect sizes of mean pairwise distances using null models) as well as mean values of beetle body size, wood diameter niche and canopy cover niche, but would increase decay stage niche. As expected, salvage logging caused a decrease in species richness, but led to an increase in functional diversity by altering the species composition from habitat-filtered assemblages toward random assemblages. Even though salvage logging removes tree trunks, the most negative effects were found for small and heliophilous species and for species specialized on wood of small diameter. Our results suggested that salvage logging disrupts the natural assembly process on windthrown trees and that negative ecological impacts are caused more by microclimate alteration of the dead-wood objects than by loss of resource amount. These insights underline the power of functional approaches to detect ecosystem responses to anthropogenic disturbance and form a basis for management decisions in conservation. To mitigate negative effects on saproxylic beetle diversity after windthrows, we recommend preserving single windthrown trees or at least their tops with exposed branches during salvage logging. Such an extension of the green-tree retention approach to windthrown trees will preserve natural succession and associated communities of disturbed spruce forests. PMID:25050914

  5. New insights into the consequences of post-windthrow salvage logging revealed by functional structure of saproxylic beetles assemblages.

    PubMed

    Thorn, Simon; Bässler, Claus; Gottschalk, Thomas; Hothorn, Torsten; Bussler, Heinz; Raffa, Kenneth; Müller, Jörg

    2014-01-01

    Windstorms, bark beetle outbreaks and fires are important natural disturbances in coniferous forests worldwide. Wind-thrown trees promote biodiversity and restoration within production forests, but also cause large economic losses due to bark beetle infestation and accelerated fungal decomposition. Such damaged trees are often removed by salvage logging, which leads to decreased biodiversity and thus increasingly evokes discussions between economists and ecologists about appropriate strategies. To reveal the reasons behind species loss after salvage logging, we used a functional approach based on four habitat-related ecological traits and focused on saproxylic beetles. We predicted that salvage logging would decrease functional diversity (measured as effect sizes of mean pairwise distances using null models) as well as mean values of beetle body size, wood diameter niche and canopy cover niche, but would increase decay stage niche. As expected, salvage logging caused a decrease in species richness, but led to an increase in functional diversity by altering the species composition from habitat-filtered assemblages toward random assemblages. Even though salvage logging removes tree trunks, the most negative effects were found for small and heliophilous species and for species specialized on wood of small diameter. Our results suggested that salvage logging disrupts the natural assembly process on windthrown trees and that negative ecological impacts are caused more by microclimate alteration of the dead-wood objects than by loss of resource amount. These insights underline the power of functional approaches to detect ecosystem responses to anthropogenic disturbance and form a basis for management decisions in conservation. To mitigate negative effects on saproxylic beetle diversity after windthrows, we recommend preserving single windthrown trees or at least their tops with exposed branches during salvage logging. Such an extension of the green-tree retention approach to windthrown trees will preserve natural succession and associated communities of disturbed spruce forests. PMID:25050914

  6. Revisiting hydrostratigraphy in Bandung-Soreang groundwater basin: A well-logs re-analysis

    NASA Astrophysics Data System (ADS)

    Sunarwan, B.; Irawan, D. E.; Puradimaja, D. J.; Notosiswoyo, S.; Sadisun, I. A.; Setiawan, T.; Anugrah, R. M.

    2015-09-01

    An attempt to revisit the hydro-stratigraphy of Bandung-Soreang Groundwater Basin (BSGB) has been done based on 111 well-logging training dataset. Transformation of resistivity values from well-log data to relative porosity and permeability used Chillingarian approach and Baker-Hughes Atlas of log responses. Then boundary marker was drawn to separated different aquifer layers. Simple linear regression equations were derived from the transformation: (a) tuf layers: ? = -0.0023? + 2.5619, ? = -63.514? + 167.38, ? = 22.912 ? + 238.78; (b) clay layers: ? = -0.0181 ? + 2.6281, ? = -61.842 ? + 163.91, ? = 5.1202 ? - 11.503; (c) sand layers: ? = -0.0078 ? + 2.5992, ? = -60.75 ? + 161.02, ? = 394.35 ? - 2156.8. Based on the new aquifer taxonomy, three hydro-stratigraphic units (HSU) and six sub HSU have been defined. UHs 1 is the top layer of the BSGB, located at elevation above 650 masl. It has three sub HSU that consists of tuf and sand. The permeability (K) values of this unit range from 0,0014 to 0.1 m per day. HSU-2 with two sub HSU consists of tuf and sand, located at elevation from 625 to 650 masl. This unit has K values from 0.1 to 6 m per day. HSU-3, which is located at elevation from 500 to 625 masl, has only one sub HSU. This unit consists of tuf, sand, and volcanic breccias, with K values from 0.3 to 7.1 m per day. This models, however, are still needed more test to new dataset.

  7. Log-domain circuit models of chemical reactions

    E-print Network

    Mandal, Soumyajit

    We exploit the detailed similarities between electronics and chemistry to develop efficient, scalable bipolar or subthreshold log-domain circuits that are dynamically equivalent to networks of chemical reactions. Our ...

  8. 5. VIEW OF SITE, AREA B; LOG BUILDING AND BUNKHOUSE ...

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

    5. VIEW OF SITE, AREA B; LOG BUILDING AND BUNKHOUSE (Features 9 and 10) AT FAR LEFT AND HOUSE (Feature 13) AT CENTER (n.d.) - Gold Dust Mine, Mill & Camp Complex, Wards Gulch, Salmon, Lemhi County, ID

  9. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Station log and radio watches. 80.1153 Section 80.1153...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153...

  10. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Station log and radio watches. 80.1153 Section 80.1153...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153...

  11. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Station log and radio watches. 80.1153 Section 80.1153...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153...

  12. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false Station log and radio watches. 80.1153 Section 80.1153...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153...

  13. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false Station log and radio watches. 80.1153 Section 80.1153...COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153...

  14. 50. View of Caroline Dormon's log house looking from the ...

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

    50. View of Caroline Dormon's log house looking from the southwest (view similar to HALS no. LA-1-21) - Briarwood: The Caroline Dormon Nature Preserve, 216 Caroline Dormon Road, Saline, Bienville Parish, LA

  15. 51. View of Caroline Dormon's log house looking from the ...

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

    51. View of Caroline Dormon's log house looking from the southeast (similar to HALS no. LA-1-18) - Briarwood: The Caroline Dormon Nature Preserve, 216 Caroline Dormon Road, Saline, Bienville Parish, LA

  16. 13. VIEW OF LOG BRIDGE (LATER SUPERSEDED BY THE WIREROPE ...

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

    13. VIEW OF LOG BRIDGE (LATER SUPERSEDED BY THE WIRE-ROPE SUSPENSION BRIDGE), SHOWING OVERHANG WHERE ROCK WAS BLASTED OUT, LOOKING NORTHEAST - Goat Trail Mining Road, Highway 20, 1.5 miles North of Newhalem, Newhalem, Whatcom County, WA

  17. 14. VIEW OF LOG BRIDGE (LATER SUPERSEDED BY THE WIREROPE ...

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

    14. VIEW OF LOG BRIDGE (LATER SUPERSEDED BY THE WIRE-ROPE SUSPENSION BRIDGE), SHOWING OVERHANG WHERE ROCK WAS BLASTED OUT, LOOKING SOUTHWEST - Goat Trail Mining Road, Highway 20, 1.5 miles North of Newhalem, Newhalem, Whatcom County, WA

  18. MEMBER CENTER: Create Account | Log In Email Print Text Size

    E-print Network

    Chiao, Jung-Chih

    MEMBER CENTER: Create Account | Log In Email Print Text Size Wireless System Tracks Esophageal to a wireless sensor worn around the patient's neck. Details about this system, which is still in the test phase

  19. University Disclosure Log No. _______________ (Assigned by Patent Administrator)

    E-print Network

    Pavlov, Ronnie

    University Disclosure Log No. _______________ (Assigned by Patent Administrator) INVENTION: Patentable Invention is any useful, novel and nonobvious process, machine, manufacture, or composition attached "Invention Tips" entitled "Loss of Patent Rights by Publication". Conception is "the formation

  20. Respirator Inspection Log For Non-SCBA emergency Use Respirators

    E-print Network

    Slatton, Clint

    Respirator Inspection Log For Non-SCBA emergency Use Respirators Appendix E For emergency use respirators, the following checklist will be used monthly to inspect the respirator. The wearer shall initial

  1. 3. View of corner connecting log section to north section ...

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

    3. View of corner connecting log section to north section of building. LOOKING SOUTHEAST. - Department of Energy, Grand Junction Office, Building No. 12, 2597 B3/4 Road, Grand Junction, Mesa County, CO

  2. Symposium on high-temperature well-logging instrumentation

    SciTech Connect

    Dennis, B.R.

    1986-06-01

    The symposium contains papers about developments in borehole logging instrumentation that can withstand downhole temperatures in excess of 300/sup 0/C and pressures greater than 103 MPa. Separate abstracts have been prepared for individual papers. (ACR)

  3. Optimized Hypergraph Clustering-based Network Security Log Mining*

    NASA Astrophysics Data System (ADS)

    Che, Jianhua; Lin, Weimin; Yu, Yong; Yao, Wei

    With network's growth and popularization, network security experts are facing bigger and bigger network security log. Network security log is a kind of valuable and important information recording various network behaviors, and has the features of large-scale and high dimension. Therefore, how to analyze these network security log to enhance the security of network becomes the focus of many researchers. In this paper, we first design a frequent attack sequencebased hypergraph clustering algorithm to mine the network security log, and then improve this algorithm with a synthetic measure of hyperedge weight and two optimization functions of clustering result. The experimental results show that the synthetic measure and optimization functions can promote significantly the coverage and precision of clustering result. The optimized hypergraph clustering algorithm provides a data analyzing method for intrusion detecting and active forewarning of network.

  4. VEHS Radiation Safety Radioactive Material Sink Disposal Log

    E-print Network

    Wikswo, John

    be disposed in a sink posted with a "Radioactive Hot Sink" label by VEHS radiation safety. Date of DisposalVEHS Radiation Safety Radioactive Material Sink Disposal Log Keep Posted ­ VEHS Radiation Safety: Date Entered: ____________ Initials: _____ Principal Investigator: _____________________ Date Posted

  5. Evaluation of Potash Grade with Gamma-ray Logs

    USGS Publications Warehouse

    Nelson, Philip H.

    2007-01-01

    Potassium is an emitter of gamma-ray radiation, consequently deposits of potash can be detected and evaluated using gamma-ray logs. A method originally designed to evaluate uranium deposits in boreholes can also be applied to potash deposits. The method equates the depth-integral of a gamma-ray log to the grade-thickness product of a potash-bearing bed or series of beds. The average grade of a bed is then determined by dividing by the overall bed thickness, which can also be obtained from the gamma-ray log. The method was tested using gamma-ray logs and potash assays from boreholes near Carlsbad, New Mexico.

  6. VerSum: Verifiable Computations over Large Public Logs

    E-print Network

    van den Hooff, Jelle

    VerSum allows lightweight clients to outsource expensive computations over large and frequently changing data structures, such as the Bitcoin or Namecoin blockchains, or a Certificate Transparency log. VerSum clients ensure ...

  7. Logging cuts the functional importance of invertebrates in tropical rainforest.

    PubMed

    Ewers, Robert M; Boyle, Michael J W; Gleave, Rosalind A; Plowman, Nichola S; Benedick, Suzan; Bernard, Henry; Bishop, Tom R; Bakhtiar, Effendi Y; Chey, Vun Khen; Chung, Arthur Y C; Davies, Richard G; Edwards, David P; Eggleton, Paul; Fayle, Tom M; Hardwick, Stephen R; Homathevi, Rahman; Kitching, Roger L; Khoo, Min Sheng; Luke, Sarah H; March, Joshua J; Nilus, Reuben; Pfeifer, Marion; Rao, Sri V; Sharp, Adam C; Snaddon, Jake L; Stork, Nigel E; Struebig, Matthew J; Wearn, Oliver R; Yusah, Kalsum M; Turner, Edgar C

    2015-01-01

    Invertebrates are dominant species in primary tropical rainforests, where their abundance and diversity contributes to the functioning and resilience of these globally important ecosystems. However, more than one-third of tropical forests have been logged, with dramatic impacts on rainforest biodiversity that may disrupt key ecosystem processes. We find that the contribution of invertebrates to three ecosystem processes operating at three trophic levels (litter decomposition, seed predation and removal, and invertebrate predation) is reduced by up to one-half following logging. These changes are associated with decreased abundance of key functional groups of termites, ants, beetles and earthworms, and an increase in the abundance of small mammals, amphibians and insectivorous birds in logged relative to primary forest. Our results suggest that ecosystem processes themselves have considerable resilience to logging, but the consistent decline of invertebrate functional importance is indicative of a human-induced shift in how these ecological processes operate in tropical rainforests. PMID:25865801

  8. Correction method for sonic logging trace from deviated well

    SciTech Connect

    Xuejun, W.; Xiaoping, Z. )

    1992-01-01

    This paper reports that the synthetic seismogram derived from deviated well logging trace can not be used to make stratigraphic division along the deviated well. It may be applied to stratigraphic division for the vertical seismic trace at the head of the deviated well; however, great error occurs in such stratigraphic division because of bed dip influence. It is necessary, therefore, to make dip and depth corrections of the deviated well logging trace so as to obtain a pseudo logging trace which reflects the petrophysical property of a vertical seismic trace at the well head. Then the pseudo vertical logging trace is used to produce synthetic seismogram that can be used to perform stratigraphic division for vertical seismic trace at the well head. The example shows that the stratigraphic division using this method is reliable. This method is applicable for the are in which geological structure is simple.

  9. Logging cuts the functional importance of invertebrates in tropical rainforest

    PubMed Central

    Ewers, Robert M.; Boyle, Michael J. W.; Gleave, Rosalind A.; Plowman, Nichola S.; Benedick, Suzan; Bernard, Henry; Bishop, Tom R.; Bakhtiar, Effendi Y.; Chey, Vun Khen; Chung, Arthur Y. C.; Davies, Richard G.; Edwards, David P.; Eggleton, Paul; Fayle, Tom M.; Hardwick, Stephen R.; Homathevi, Rahman; Kitching, Roger L.; Khoo, Min Sheng; Luke, Sarah H.; March, Joshua J.; Nilus, Reuben; Pfeifer, Marion; Rao, Sri V.; Sharp, Adam C.; Snaddon, Jake L.; Stork, Nigel E.; Struebig, Matthew J.; Wearn, Oliver R.; Yusah, Kalsum M.; Turner, Edgar C.

    2015-01-01

    Invertebrates are dominant species in primary tropical rainforests, where their abundance and diversity contributes to the functioning and resilience of these globally important ecosystems. However, more than one-third of tropical forests have been logged, with dramatic impacts on rainforest biodiversity that may disrupt key ecosystem processes. We find that the contribution of invertebrates to three ecosystem processes operating at three trophic levels (litter decomposition, seed predation and removal, and invertebrate predation) is reduced by up to one-half following logging. These changes are associated with decreased abundance of key functional groups of termites, ants, beetles and earthworms, and an increase in the abundance of small mammals, amphibians and insectivorous birds in logged relative to primary forest. Our results suggest that ecosystem processes themselves have considerable resilience to logging, but the consistent decline of invertebrate functional importance is indicative of a human-induced shift in how these ecological processes operate in tropical rainforests. PMID:25865801

  10. Identification of Competencies for Forest Production and Logging Occupations

    ERIC Educational Resources Information Center

    McCully, James S.

    1977-01-01

    The author presents the research methodology and a summary of the findings from a study to investigate the competencies required for entrance into the occupations of forestry aide, logging skidder operator, and wood producer. (MF)

  11. 16. VIEW OF UNIDENTIFIED MEN STANDING ON LOG BRIDGE ALONG ...

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

    16. VIEW OF UNIDENTIFIED MEN STANDING ON LOG BRIDGE ALONG UNIDENTIFIED SECTION OF GOAT TRAIL MINING ROAD - Goat Trail Mining Road, Highway 20, 1.5 miles North of Newhalem, Newhalem, Whatcom County, WA

  12. 13. DETAIL SHOWING EXPOSED VERTICAL LOG CONSTRUCTION WITH MEASURING TAPE, ...

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

    13. DETAIL SHOWING EXPOSED VERTICAL LOG CONSTRUCTION WITH MEASURING TAPE, WEST ROOM AT REAR OF HOUSE, FIRST FLOOR - Pierre Delassus DeLuziereHouse, U.S. Route 61, Sainte Genevieve, Ste. Genevieve County, MO

  13. Although logging is usually highly selective, inadequate operational techniques often mean that significant

    E-print Network

    Although logging is usually highly selective, inadequate operational techniques often mean affecting the region's forests. Much of the logging practiced widely in the Amazon today canberegardedasminingbecauseitdoesnottakeintoaccount the potential renewability of the natural resource.Although logging is usually highly selective

  14. 75 FR 81660 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Logging...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-28

    ...Submission for OMB Review; Comment Request; Logging Operations Standard ACTION: Notice...collection request (ICR) titled, ``Logging Operations Standard,'' to the Office...gov. SUPPLEMENTARY INFORMATION: The logging operations standard requires...

  15. Integrating PCLIPS into ULowell's Lincoln Logs: Factory of the future

    NASA Technical Reports Server (NTRS)

    Mcgee, Brenda J.; Miller, Mark D.; Krolak, Patrick; Barr, Stanley J.

    1990-01-01

    We are attempting to show how independent but cooperating expert systems, executing within a parallel production system (PCLIPS), can operate and control a completely automated, fault tolerant prototype of a factory of the future (The Lincoln Logs Factory of the Future). The factory consists of a CAD system for designing the Lincoln Log Houses, two workcells, and a materials handling system. A workcell consists of two robots, part feeders, and a frame mounted vision system.

  16. Fluid-Rock Characterization and Interactions in NMR Well Logging

    SciTech Connect

    Hirasaki, George J.; Mohanty, Kishore K.

    2003-02-10

    The objective of this project was to characterize the fluid properties and fluid-rock interactions which are needed for formation evaluation by NMR well logging. NMR well logging is finding wide use in formation evaluation. The formation parameters commonly estimated were porosity, permeability, and capillary bound water. Special cases include estimation of oil viscosity, residual oil saturation, location of oil/water contact, and interpretation on whether the hydrocarbon is oil or gas.

  17. Fluid-Rock Characterization and Interactions in NMR Well Logging

    SciTech Connect

    Hirasaki, George J.; Mohanty, Kishore K.

    2003-02-10

    The objective of this project was to characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. The advances made in the understanding of NMR fluid properties are summarized in a chapter written for an AAPG book on NMR well logging. This includes live oils, viscous oils, natural gas mixtures, and the relation between relaxation time and diffusivity.

  18. Long-term responses of rainforest erosional systems at different spatial scales to selective logging and climatic change

    PubMed Central

    Walsh, R. P. D.; Bidin, K.; Blake, W. H.; Chappell, N. A.; Clarke, M. A.; Douglas, I.; Ghazali, R.; Sayer, A. M.; Suhaimi, J.; Tych, W.; Annammala, K. V.

    2011-01-01

    Long-term (21–30 years) erosional responses of rainforest terrain in the Upper Segama catchment, Sabah, to selective logging are assessed at slope, small and large catchment scales. In the 0.44 km2 Baru catchment, slope erosion measurements over 1990–2010 and sediment fingerprinting indicate that sediment sources 21 years after logging in 1989 are mainly road-linked, including fresh landslips and gullying of scars and toe deposits of 1994–1996 landslides. Analysis and modelling of 5–15 min stream-suspended sediment and discharge data demonstrate a reduction in storm-sediment response between 1996 and 2009, but not yet to pre-logging levels. An unmixing model using bed-sediment geochemical data indicates that 49 per cent of the 216 t km?2 a?1 2009 sediment yield comes from 10 per cent of its area affected by road-linked landslides. Fallout 210Pb and 137Cs values from a lateral bench core indicate that sedimentation rates in the 721 km2 Upper Segama catchment less than doubled with initially highly selective, low-slope logging in the 1980s, but rose 7–13 times when steep terrain was logged in 1992–1993 and 1999–2000. The need to keep steeplands under forest is emphasized if landsliding associated with current and predicted rises in extreme rainstorm magnitude-frequency is to be reduced in scale. PMID:22006973

  19. CRYPTOSPORIDIUM LOG-INACTIVATION WITH OZONE USING EFFLUENT CT 10, GEOMETRIC MEAN CT 10 EXTENDED INTEGRATED CT 10 AND EXTENDED-CSTR CALCULATIONS

    EPA Science Inventory

    The draft Long Term 2 Enhanced Surface Water Treatment Rule ("LT2ESWTR") contains Cryptosporidium log-inactivation CT tables. Depending on the water temperature, the Cryptosporidium CT values that are listed are 15 to 25 times greater than CT values fo...

  20. Gpr Scanning Methods for Enhanced Data Imaging in Wooden Logs

    NASA Astrophysics Data System (ADS)

    Pyakurel, Sandeep; Halabe, Udaya B.

    2008-02-01

    A major problem facing wooden saw mills is the presence of hidden or subsurface defects in logs (such as embedded nails and metallic objects, knots and decays) that become visible only after the log is sawed and processed into lumber or veneer. If these defects are detected earlier, that is, before the log is sawn into lumber or sliced into veneer, significant increases in productivity can result by avoiding these defects through optimization of the sawing process. Recently, Ground Penetrating Radar (GPR) has been used to identify subsurface defects in wooden logs. Past study conducted by the authors showed that GPR has the potential to be successfully implemented as a nondestructive method to identify these defects. Therefore, this research is focused on exploring different ways to enhance the GPR data acquisition in order to obtain maximum information from the GPR radargram on the internal condition of wooden logs. Data acquisition involved methods such as canting the logs, designing suitable test set up and using higher frequency antennas. This paper discusses GPR imaging and mapping of the internal defects using data enhancements in a manner suitable for future online implementation.

  1. Value Stream Mapping Value Stream Mapping VSM

    E-print Network

    Laksanacharoen, Sathaporn

    Value Stream Mapping (VSM)(VSM) #12;Value Stream Mapping VSM 1 Value Stream Mapping VSM 1 Value Stream Current State Map As-Is State / - Process owner - Process owner #12) #12;Value Stream MappingValue Stream Mapping End to End Patient Flow Register OPD/ER Admit Dischargeg

  2. Monte Carlo based, patient-specific RapidArc QA using Linac log files

    SciTech Connect

    Teke, Tony; Bergman, Alanah M.; Kwa, William; Gill, Bradford; Duzenli, Cheryl; Popescu, I. Antoniu

    2010-01-15

    Purpose: A Monte Carlo (MC) based QA process to validate the dynamic beam delivery accuracy for Varian RapidArc (Varian Medical Systems, Palo Alto, CA) using Linac delivery log files (DynaLog) is presented. Using DynaLog file analysis and MC simulations, the goal of this article is to (a) confirm that adequate sampling is used in the RapidArc optimization algorithm (177 static gantry angles) and (b) to assess the physical machine performance [gantry angle and monitor unit (MU) delivery accuracy]. Methods: Ten clinically acceptable RapidArc treatment plans were generated for various tumor sites and delivered to a water-equivalent cylindrical phantom on the treatment unit. Three Monte Carlo simulations were performed to calculate dose to the CT phantom image set: (a) One using a series of static gantry angles defined by 177 control points with treatment planning system (TPS) MLC control files (planning files), (b) one using continuous gantry rotation with TPS generated MLC control files, and (c) one using continuous gantry rotation with actual Linac delivery log files. Monte Carlo simulated dose distributions are compared to both ionization chamber point measurements and with RapidArc TPS calculated doses. The 3D dose distributions were compared using a 3D gamma-factor analysis, employing a 3%/3 mm distance-to-agreement criterion. Results: The dose difference between MC simulations, TPS, and ionization chamber point measurements was less than 2.1%. For all plans, the MC calculated 3D dose distributions agreed well with the TPS calculated doses (gamma-factor values were less than 1 for more than 95% of the points considered). Machine performance QA was supplemented with an extensive DynaLog file analysis. A DynaLog file analysis showed that leaf position errors were less than 1 mm for 94% of the time and there were no leaf errors greater than 2.5 mm. The mean standard deviation in MU and gantry angle were 0.052 MU and 0.355 deg., respectively, for the ten cases analyzed. Conclusions: The accuracy and flexibility of the Monte Carlo based RapidArc QA system were demonstrated. Good machine performance and accurate dose distribution delivery of RapidArc plans were observed. The sampling used in the TPS optimization algorithm was found to be adequate.

  3. Imprints of log-periodic self-similarity in the stock market

    E-print Network

    S. Drozdz; F. Ruf; J. Speth; M. Wojcik

    1999-05-12

    Detailed analysis of the log-periodic structures as precursors of the financial crashes is presented. The study is mainly based on the German Stock Index (DAX) variation over the 1998 period which includes both, a spectacular boom and a large decline, in magnitude only comparable to the so-called Black Monday of October 1987. The present example provides further arguments in favour of a discrete scale-invariance governing the dynamics of the stock market. A related clear log-periodic structure prior to the crash and consistent with its onset extends over the period of a few months. Furthermore, on smaller time-scales the data seems to indicate the appearance of analogous log-periodic oscillations as precursors of the smaller, intermediate decreases. Even the frequencies of such oscillations are similar on various levels of resolution. The related value $\\lambda \\approx 2$ of preferred scaling ratios is amazingly consistent with those found for a wide variety of other complex systems. Similar analysis of the major American indices between September 1998 and February 1999 also provides some evidence supporting this concept but, at the same time, illustrates a possible splitting of the dynamics that a large market may experience.

  4. Hydraulic head applications of flow logs in the study of heterogeneous aquifers

    USGS Publications Warehouse

    Paillet, F.L.

    2001-01-01

    Permeability profiles derived from high-resolution flow logs in heterogeneous aquifers provide a limited sample of the most permeable beds or fractures determining the hydraulic properties of those aquifers. This paper demonstrates that flow logs can also be used to infer the large-scale properties of aquifers surrounding boreholes. The analysis is based on the interpretation of the hydraulic head values estimated from the flow log analysis. Pairs of quasi-steady flow profiles obtained under ambient conditions and while either pumping or injecting are used to estimate the hydraulic head in each water-producing zone. Although the analysis yields localized estimates of transmissivity for a few water-producing zones, the hydraulic head estimates apply to the farfield aquifers to which these zones are connected. The hydraulic head data are combined with information from other sources to identify the large-scale structure of heterogeneous aquifers. More complicated cross-borehole flow experiments are used to characterize the pattern of connection between large-scale aquifer units inferred from the hydraulic head estimates. The interpretation of hydraulic heads in situ under steady and transient conditions is illustrated by several case studies, including an example with heterogeneous permeable beds in an unconsolidated aquifer, and four examples with heterogeneous distributions of bedding planes and/or fractures in bedrock aquifers.

  5. 4.4 Evaluating Logs In Pairs: Person One: Use the change of base formula to convert log4 7 to the common log and evaluate.

    E-print Network

    Hubbard, Keith

    : The magnitude of an earthquake is measured on the Richter scale which is determined by the equation = log 0 where is the amplitude of a given quake, is the measure of the quake on the Richter scale, and 0 on the Richter scale, how many times larger is it than the smallest measurable earthquake? What about 3? What

  6. Meta-Analysis of Mass Balances Examining Chemical Fate during Wastewater Treatment

    PubMed Central

    2008-01-01

    Mass balances are an instructive means for investigating the fate of chemicals during wastewater treatment. In addition to the aqueous-phase removal efficiency (?), they can inform on chemical partitioning, transformation, and persistence, as well as on the chemical loading to streams and soils receiving, respectively, treated effluent and digested sewage sludge (biosolids). Release rates computed on a per-capita basis can serve to extrapolate findings to a larger scale. This review examines over a dozen mass balances conducted for various organic wastewater contaminants, including prescription drugs, estrogens, fragrances, antimicrobials, and surfactants of differing sorption potential (hydrophobicity), here expressed as the 1-octanol?water partition coefficient (KOW) and the organic carbon normalized sorption coefficient (KOC). Major challenges to mass balances are the collection of representative samples and accurate quantification of chemicals in sludge. A meta-analysis of peer-reviewed data identified sorption potential as the principal determinant governing chemical persistence in biosolids. Occurrence data for organic wastewater compounds detected in digested sludge followed a simple nonlinear model that required only KOW or KOC as the input and yielded a correlation coefficient of 0.9 in both instances. The model predicted persistence in biosolids for the majority (>50%) of the input load of organic wastewater compounds featuring a log10KOW value of greater than 5.2 (log10KOC > 4.4). In contrast, hydrophobicity had no or only limited value for estimating, respectively, ? and the overall persistence of a chemical during conventional wastewater treatment. PMID:18800497

  7. Computer method to detect and correct cycle skipping on sonic logs

    SciTech Connect

    Muller, D.C.

    1985-06-17

    A simple but effective computer method has been developed to detect cycle skipping on sonic logs and to replace cycle skips with estimates of correct traveltimes. The method can be used to correct observed traveltime pairs from the transmitter to both receivers. The basis of the method is the linearity of a plot of theoretical traveltime from the transmitter to the first receiver versus theoretical traveltime from the transmitter to the second receiver. Theoretical traveltime pairs are calculated assuming that the sonic logging tool is centered in the borehole, that the borehole diameter is constant, that the borehole fluid velocity is constant, and that the formation is homogeneous. The plot is linear for the full range of possible formation-rock velocity. Plots of observed traveltime pairs from a sonic logging tool are also linear but have a large degree of scatter due to borehole rugosity, sharp boundaries exhibiting large velocity contrasts, and system measurement uncertainties. However, this scatter can be reduced to a level that is less than scatter due to cycle skipping, so that cycle skips may be detected and discarded or replaced with estimated values of traveltime. Advantages of the method are that it can be applied in real time, that it can be used with data collected by existing tools, that it only affects data that exhibit cycle skipping and leaves other data unchanged, and that a correction trace can be generated which shows where cycle skipping occurs and the amount of correction applied. The method has been successfully tested on sonic log data taken in two holes drilled at the Nevada Test Site, Nye County, Nevada.

  8. Estimation of mineralogy and lithology from geochemical log measurements

    SciTech Connect

    Wndlandt, R.F. ); Bhuyan, K. )

    1990-06-01

    Mineralogy, chemistry, and physical properties of core samples from a research well in Grand County, Utah, have been determined to assess the applications of geochemical logging tool measurements to reservoir characterization. The cored interval (over 827 ft or 252 m of continuous core) samples a wide range of lithologies, including subarkose, sublitharenite, litharenite, feldspathic litharenite, quartz wacke, lithic wacke, siltstone, mudstone, and coal. Total clay mineral contents range from 2 to almost 60 wt. go and consist primarily of illite and kaolinite with subordinate ordered, mixed-layer illite/smectite. Dolomite cement is pervasive; locally, large amounts (up to 25 wt.%) of siderite or ankerite are present. Total feldspar minerals comprise 5-18 wt.% with sodium-rich plagioclase slightly more abundant than potassium feldspar. Continuous geochemical well logs of 12 elements (K, U, Th, Al, Si, Ca, Fe, S, Gd, Ti, Cl, and H) were obtained using logging tools that measure neutron capture, neutron activation, and natural gamma-ray activities. Applications of these geochemical log measurements to assess mineralogy and lithology for the research well are complicated by (1) the near compositional colinearity of the assemblage illite + kaolinite + K-feldspar, (2) the presence of dolomite and iron-bearing carbonates, (3) the predominance of Naplagioclase over K-feldspar, and (4) the abundance of sedimentary and metamorphic rock fragments in the litharenite group of lithologies. Because of these mineral and textural features, successful application of the log measurements to reservoir characterization requires calibration to core analyses. Mineral logs calculated using least-squares inversion programs accurately describe changes in mineralogy and mineral proportions once the mineral assemblage is identified. Lithology is best estimated based on these mineral logs.

  9. Assessment of gas hydrate concentrations (saturations) with downhole electrical resistivity logs on Hydrate Ridge

    NASA Astrophysics Data System (ADS)

    Collett, T.; Goldberg, D.; Guerin, G.; Barr, S.; Leg 204 Shipboard Scientific Party, I.

    2003-04-01

    The downhole logging program on Ocean Drilling Program (ODP) Leg 204 was designed to obtain the data needed to assess the occurrence and concentration of gas hydrates beneath Hydrate Ridge off the northwest coast of the United States. During Leg 204, logging-while-drilling (LWD) tools were deployed at eight of the nine sites cored on Hydrate Ridge. The LWD tools used during Leg 204 were provided by Schlumberger, they included the resistivity-at-the-bit (RAB-GVR) tool, the magnetic resonance while drilling (MRWD) tool, and the azimuthal density-neutron (VDN) tool. It has been shown that it is possible to obtain gas-hydrate saturations (percent of pore space occupied by gas hydrate) by using the Archie relation to analyze the electrical resistivity of gas-hydrate-bearing sediments. In this study, the Archie relation was used with resistivity data from the GVR tool and porosity data from the VDN density tool to calculate water saturations at all eight LWD log sites on Hydrate Ridge. The downhole log inferred distribution of gas hydrate beneath Hydrate Ridge and the adjacent slope basin is heterogeneous, with downhole RAB images showing gas hydrate occupying fractures and occurring as a disseminated pore-filling material within flat lying stratigraphic units with thicknesses varying from several centimeters to as much as 10 m. The Archie relation yielded water saturations ranging from low values near the crest of the ridge, of about 10% in Hole 1249A, to a more common value of about 90% along the flanks of the ridge. It is generally accepted that with the zone of gas hydrate stability, gas hydrate saturations (S_h) are the mathematical complement of Archie derived water saturations (S_w), with S_h=1-S_w. Thus, the Archie derived gas hydrate saturations at the crest of the ridge exceed 90%. It should be noted that the Archie relation cannot distinguish between the occurrence of free-gas and gas hydrate. But, neutron porosity logs from the VDN tool, which are sensitive to the occurrence of free gas, did not reveal the presence of any significant free-gas occurrence above the depth of the BSR on Hydrate Ridge.

  10. Reconstruction of Sedimentary Sequence in Kumano Forearc Basin of southwest Japan by IODP Core-Log Integration

    NASA Astrophysics Data System (ADS)

    Sakurai, N.; Ashi, J.; Saito, S.

    2010-12-01

    Downhole logging data combined with core data are useful to determine physical properties and lithology of the formation. However, layer-by-layer analyses were not routinely conducted especially for marine siliciclastic sediments due to poor core recovery. We aim to investigate detailed analysis of sedimentary sequence developed in Kumano Basin using core-log integration method. During Integrated Ocean Drilling Program (IODP) Expeditions 314/315, Site C0002 was drilled, logged, and cored down to 1400 meters below seafloor (mbsf). Stratified structures are clearly imaged by a seismic reflection profile in the southern edge of Kumano Basin including Site C0002 area. A 935m-thick basin fill and accretionary prism were drilled and logged with logging-while-drilling (LWD) at Hole C0002A and high quality data were continuously acquired. Coring operations were conducted at the intervals 0-204 and 475-1057 mbsf in Hole C0002B. Although the two holes are tens of meters away, they are close enough to correlate. We compared lithology of the recovered cores and log data, mainly resistivity and natural gamma ray, in the two cored intervals. As the core recovery was good throughout the upper interval, clear correlations are recognized between the lithological variations and log responses. Most of the sand layers are characterized by low gamma ray and low resistivity values. In the lower interval, where cores were recovered by the RCB system, the core recovery was poor and the dominant lithology is mudstone. However, the log responses suggest that the formation in the lower interval are composed of alternating beds of sandstone and mudstone. The thickness of LWD-based mudstone coincides with the thickness of recovered sediments (=mudstone), suggesting that the recovered cores represent highly biased lithology due to no recovery of sandstone. Based on the core-log integration studies, the LWD-derived lithology can be applied for the entire section of the hole including non-cored and poorly recovered intervals. We reconstructed the history of sand supply into the Kumano Basin based on the detailed analysis of the thickness and frequency of sand layers at Site C0002.

  11. Four Decades of Forest Persistence, Clearance and Logging on Borneo

    PubMed Central

    Gaveau, David L. A.; Sloan, Sean; Molidena, Elis; Yaen, Husna; Sheil, Doug; Abram, Nicola K.; Ancrenaz, Marc; Nasi, Robert; Quinones, Marcela; Wielaard, Niels; Meijaard, Erik

    2014-01-01

    The native forests of Borneo have been impacted by selective logging, fire, and conversion to plantations at unprecedented scales since industrial-scale extractive industries began in the early 1970s. There is no island-wide documentation of forest clearance or logging since the 1970s. This creates an information gap for conservation planning, especially with regard to selectively logged forests that maintain high conservation potential. Analysing LANDSAT images, we estimate that 75.7% (558,060 km2) of Borneo's area (737,188 km2) was forested around 1973. Based upon a forest cover map for 2010 derived using ALOS-PALSAR and visually reviewing LANDSAT images, we estimate that the 1973 forest area had declined by 168,493 km2 (30.2%) in 2010. The highest losses were recorded in Sabah and Kalimantan with 39.5% and 30.7% of their total forest area in 1973 becoming non-forest in 2010, and the lowest in Brunei and Sarawak (8.4%, and 23.1%). We estimate that the combined area planted in industrial oil palm and timber plantations in 2010 was 75,480 km2, representing 10% of Borneo. We mapped 271,819 km of primary logging roads that were created between 1973 and 2010. The greatest density of logging roads was found in Sarawak, at 0.89 km km?2, and the lowest density in Brunei, at 0.18 km km?2. Analyzing MODIS-based tree cover maps, we estimate that logging operated within 700 m of primary logging roads. Using this distance, we estimate that 266,257 km2 of 1973 forest cover has been logged. With 389,566 km2 (52.8%) of the island remaining forested, of which 209,649 km2 remains intact. There is still hope for biodiversity conservation in Borneo. Protecting logged forests from fire and conversion to plantations is an urgent priority for reducing rates of deforestation in Borneo. PMID:25029192

  12. Biological legacies buffer local species extinction after logging

    PubMed Central

    Rudolphi, Jörgen; Jönsson, Mari T; Gustafsson, Lena

    2014-01-01

    Clearcutting has been identified as a main threat to forest biodiversity. In the last few decades, alternatives to clearcutting have gained much interest. Living and dead trees are often retained after harvest to serve as structural legacies to mitigate negative effects of forestry. However, this practice is widely employed without information from systematic before–after control-impact studies to assess the processes involved in species responses after clearcutting with retention. We performed a large-scale survey of the occurrence of logging-sensitive and red-listed bryophytes and lichens before and after clearcutting with the retention approach. A methodology was adopted that, for the first time in studies on retention approaches, enabled monitoring of location-specific substrates. We used uncut stands as controls to assess the variables affecting the survival of species after a major disturbance. In total, 12 bryophyte species and 27 lichen species were analysed. All were classified as sensitive to logging, and most species are also currently red-listed. We found that living and dead trees retained after final harvest acted as refugia in which logging-sensitive species were able to survive for 3 to 7 years after logging. Depending on type of retention and organism group, between 35% and 92% of the species occurrences persisted on retained structures. Most species observed outside retention trees or patches disappeared. Larger pre-harvest population sizes of bryophytes on dead wood increased the survival probability of the species and hence buffered the negative effects of logging. Synthesis and applications. Careful spatial planning of retention structures is required to fully embrace the habitats of logging-sensitive species. Bryophytes and lichens persisted to a higher degree in retention patches compared to solitary trees or in the clearcut area. Retaining groups of trees in logged areas will help to sustain populations of species over the clearcut phase. When possible, old logs should be moved into retention patches to provide a more beneficial environment for dead wood-dependent species. Our study also highlights the need for more before–after control-impact studies of retention forestry to explore factors influencing the survival of species after logging. PMID:25653456

  13. Four decades of forest persistence, clearance and logging on Borneo.

    PubMed

    Gaveau, David L A; Sloan, Sean; Molidena, Elis; Yaen, Husna; Sheil, Doug; Abram, Nicola K; Ancrenaz, Marc; Nasi, Robert; Quinones, Marcela; Wielaard, Niels; Meijaard, Erik

    2014-01-01

    The native forests of Borneo have been impacted by selective logging, fire, and conversion to plantations at unprecedented scales since industrial-scale extractive industries began in the early 1970s. There is no island-wide documentation of forest clearance or logging since the 1970s. This creates an information gap for conservation planning, especially with regard to selectively logged forests that maintain high conservation potential. Analysing LANDSAT images, we estimate that 75.7% (558,060 km2) of Borneo's area (737,188 km2) was forested around 1973. Based upon a forest cover map for 2010 derived using ALOS-PALSAR and visually reviewing LANDSAT images, we estimate that the 1973 forest area had declined by 168,493 km2 (30.2%) in 2010. The highest losses were recorded in Sabah and Kalimantan with 39.5% and 30.7% of their total forest area in 1973 becoming non-forest in 2010, and the lowest in Brunei and Sarawak (8.4%, and 23.1%). We estimate that the combined area planted in industrial oil palm and timber plantations in 2010 was 75,480 km2, representing 10% of Borneo. We mapped 271,819 km of primary logging roads that were created between 1973 and 2010. The greatest density of logging roads was found in Sarawak, at 0.89 km km-2, and the lowest density in Brunei, at 0.18 km km-2. Analyzing MODIS-based tree cover maps, we estimate that logging operated within 700 m of primary logging roads. Using this distance, we estimate that 266,257 km2 of 1973 forest cover has been logged. With 389,566 km2 (52.8%) of the island remaining forested, of which 209,649 km2 remains intact. There is still hope for biodiversity conservation in Borneo. Protecting logged forests from fire and conversion to plantations is an urgent priority for reducing rates of deforestation in Borneo. PMID:25029192

  14. Logs of Paleoseismic Excavations Across the Central Range Fault, Trinidad

    USGS Publications Warehouse

    Crosby, Christopher J.; Prentice, Carol S.; Weber, John; Ragona, Daniel

    2009-01-01

    This publication makes available maps and trench logs associated with studies of the Central Range Fault, part of the South American-Caribbean plate boundary in Trinidad. Our studies were conducted in 2001 and 2002. We mapped geomorphic features indicative of active faulting along the right-lateral, Central Range Fault, part of the South American-Caribbean plate boundary in Trinidad. We excavated trenches at two sites, the Samlalsingh and Tabaquite sites. At the Samlalsingh site, sediments deposited after the most recent fault movement bury the fault, and the exact location of the fault was unknown until we exposed it in our excavations. At this site, we excavated a total of eleven trenches, six of which exposed the fault. The trenches exposed fluvial sediments deposited over a strath terrace developed on Miocene bedrock units. We cleaned the walls of the excavations, gridded the walls with either 1 m X 1 m or 1 m X 0.5 m nail and string grid, and logged the walls in detail at a scale of 1:20. Additionally, we described the different sedimentary units in the field, incorporating these descriptions into our trench logs. We mapped the locations of the trenches using a tape and compass. Our field logs were scanned, and unit contacts were traced in Adobe Illustrator. The final drafted logs of all the trenches are presented here, along with photographs showing important relations among faults and Holocene sedimentary deposits. Logs of south walls were reversed in Illustrator, so that all logs are drafted with the view direction to the north. We collected samples of various materials exposed in the trench walls, including charcoal samples for radiocarbon dating from both faulted and unfaulted deposits. The locations of all samples collected are shown on the logs. The ages of seventeen of the charcoal samples submitted for radiocarbon analysis at the University of Arizona Accelerator Mass Spectrometry Laboratory in Tucson, Ariz., are given in Table 1. Samples found in Table 1 are shown in red on the trench logs. All radiocarbon ages are calibrated and given with 2 standard deviation age ranges. Our studies suggest that the Central Range Fault is a Holocene fault capable of producing damaging earthquakes in Trinidad

  15. Well log characterization of natural gas-hydrates

    USGS Publications Warehouse

    Collett, Timothy S.; Lee, Myung W.

    2012-01-01

    In the last 25 years there have been significant advancements in the use of well-logging tools to acquire detailed information on the occurrence of gas hydrates in nature: whereas wireline electrical resistivity and acoustic logs were formerly used to identify gas-hydrate occurrences in wells drilled in Arctic permafrost environments, more advanced wireline and logging-while-drilling (LWD) tools are now routinely used to examine the petrophysical nature of gas-hydrate reservoirs and the distribution and concentration of gas hydrates within various complex reservoir systems. Resistivity- and acoustic-logging tools are the most widely used for estimating the gas-hydrate content (i.e., reservoir saturations) in various sediment types and geologic settings. Recent integrated sediment coring and well-log studies have confirmed that electrical-resistivity and acoustic-velocity data can yield accurate gas-hydrate saturations in sediment grain-supported (isotropic) systems such as sand reservoirs, but more advanced log-analysis models are required to characterize gas hydrate in fractured (anisotropic) reservoir systems. New well-logging tools designed to make directionally oriented acoustic and propagation-resistivity log measurements provide the data needed to analyze the acoustic and electrical anisotropic properties of both highly interbedded and fracture-dominated gas-hydrate reservoirs. Advancements in nuclear magnetic resonance (NMR) logging and wireline formation testing (WFT) also allow for the characterization of gas hydrate at the pore scale. Integrated NMR and formation testing studies from northern Canada and Alaska have yielded valuable insight into how gas hydrates are physically distributed in sediments and the occurrence and nature of pore fluids(i.e., free water along with clay- and capillary-bound water) in gas-hydrate-bearing reservoirs. Information on the distribution of gas hydrate at the pore scale has provided invaluable insight on the mechanisms controlling the formation and occurrence of gas hydrate in nature along with data on gas-hydrate reservoir properties (i.e., porosities and permeabilities) needed to accurately predict gas production rates for various gas-hydrate production schemes.

  16. Interlake production established using quantitative hydrocarbon well-log analysis

    SciTech Connect

    Lancaster, J.; Atkinson, A.

    1988-07-01

    Production was established in a new pay zone of the basal Interlake Formation adjacent to production in Midway field in Williams County, North Dakota. Hydrocarbon saturation, which was computed using hydrocarbon well-log (mud-log) data, and computed permeability encouraged the operator to run casing and test this zone. By use of drilling rig parameters, drilling mud properties, hydrocarbon-show data from the mud log, drilled rock and porosity descriptions, and wireline log porosity, this new technique computes oil saturation (percent of porosity) and permeability to the invading filtrate, using the Darcy equation. The Leonardo Fee well was drilled to test the Devonian Duperow, the Silurian upper Interlake, and the Ordovician Red River. The upper two objectives were penetrated downdip from Midway production and there were no hydrocarbon shows. It was determined that the Red River was tight, based on sample examination by well site personnel. The basal Interlake, however, liberated hydrocarbon shows that were analyzed by this new technology. The results of this evaluation accurately predicted this well would be a commercial success when placed in production. Where geophysical log analysis might be questionable, this new evaluation technique may provide answers to anticipated oil saturation and producibility. The encouraging results of hydrocarbon saturation and permeability, produced by this technique, may be largely responsible for the well being in production today.

  17. [Using log-binomial model for estimating the prevalence ratio].

    PubMed

    Ye, Rong; Gao, Yan-hui; Yang, Yi; Chen, Yue

    2010-05-01

    To estimate the prevalence ratios, using a log-binomial model with or without continuous covariates. Prevalence ratios for individuals' attitude towards smoking-ban legislation associated with smoking status, estimated by using a log-binomial model were compared with odds ratios estimated by logistic regression model. In the log-binomial modeling, maximum likelihood method was used when there were no continuous covariates and COPY approach was used if the model did not converge, for example due to the existence of continuous covariates. We examined the association between individuals' attitude towards smoking-ban legislation and smoking status in men and women. Prevalence ratio and odds ratio estimation provided similar results for the association in women since smoking was not common. In men however, the odds ratio estimates were markedly larger than the prevalence ratios due to a higher prevalence of outcome. The log-binomial model did not converge when age was included as a continuous covariate and COPY method was used to deal with the situation. All analysis was performed by SAS. Prevalence ratio seemed to better measure the association than odds ratio when prevalence is high. SAS programs were provided to calculate the prevalence ratios with or without continuous covariates in the log-binomial regression analysis. PMID:21163041

  18. Technical evaluation of software for gamma-ray logging system

    SciTech Connect

    Stromswold, D.C.

    1994-05-01

    This report contains results of a technical review of software, identified as LGCALC, that processes data collected by a high-resolution gamma-ray borehole logging system. The software presently operates within Westinghouse Hanford Company, Department of Geosciences, to process data collected by the Radionuclide Logging System. The software has been reviewed for its suitability for processing data to be collected by new high-resolution gamma-ray logging trucks scheduled to begin operational tests within Westinghouse Tank Waste Remediation Systems during 1994. Examination of the program code and hands-on operational tests have shown that this software is suitable for its intended use of processing high-resolution gamma-ray data obtained from borehole logging. Most of the code requires no changes, but in a few limited cases, suggestions have been made to correct errors or improve operation. Section 4 describes these changes. The technical review has confirmed the appropriateness, correctness, completeness, and coding accuracy of algorithms used to process spectral gamma-ray data, leading to a calculation of subsurface radionuclide contaminants. Running the program with test data from calibration models has confirmed that the program operates correctly. Comparisons with hand calculations have shown the correctness of the output from the program, based on known input data. Section 3 describes these tests. The recommended action is to make the near term programming changes suggested in Section 4.1 and then use the LGCALC analysis program with the new high-resolution logging systems once they have been properly calibrated.

  19. Log-Gabor Weber descriptor for face recognition

    NASA Astrophysics Data System (ADS)

    Li, Jing; Sang, Nong; Gao, Changxin

    2015-09-01

    The Log-Gabor transform, which is suitable for analyzing gradually changing data such as in iris and face images, has been widely used in image processing, pattern recognition, and computer vision. In most cases, only the magnitude or phase information of the Log-Gabor transform is considered. However, the complementary effect taken by combining magnitude and phase information simultaneously for an image-feature extraction problem has not been systematically explored in the existing works. We propose a local image descriptor for face recognition, called Log-Gabor Weber descriptor (LGWD). The novelty of our LGWD is twofold: (1) to fully utilize the information from the magnitude or phase feature of multiscale and orientation Log-Gabor transform, we apply the Weber local binary pattern operator to each transform response. (2) The encoded Log-Gabor magnitude and phase information are fused at the feature level by utilizing kernel canonical correlation analysis strategy, considering that feature level information fusion is effective when the modalities are correlated. Experimental results on the AR, Extended Yale B, and UMIST face databases, compared with those available from recent experiments reported in the literature, show that our descriptor yields a better performance than state-of-the art methods.

  20. User's manual for geophysical well-logging software programs

    SciTech Connect

    Petrie, G.M.; Gibson, D.; Blair, S.C.

    1983-02-01

    Since 1958 the Ground-Water Surveillance Program for the Hanford Site has made geophysical logging measurements in most of the 800 wells and deep boreholes that have been drilled on the Hanford Site. In 1980 the Pacific Northwest Laboratory (PNL), which conducts the Ground-Water Surveillance Program, began forming a computerized data base for storing and retrieving geophysical well log data and developing software for quantitative analysis of the well log data. This report, designed to serve as a user's guide, documents the data base system that handles the well log data. Two programs, DIGLOG1 and LOGIT, are used to manipulate the data. The program DIGLOG1 translates analog paper strip charts into digital format; the program LOGIT is a general utility program that edits, displays, checks, stores, writes, and deletes sets of well log data. These two programs do not provide sophisticated display and analytical capabilities; rather, they provide programs that give the user easy access to powerful standard analytical software.

  1. 33 CFR 207.360 - Rainy River, Minn.; logging regulations for portions of river within jurisdiction of the United...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... navigation. (b) Owners of loose logs running in the river must maintain a sufficient force of men on the river to keep the logs in motion and to prevent the formation of log jams or accumulation of logs on...

  2. DNA quantification of basidiomycetous fungi during storage of logging residues.

    PubMed

    Børja, Isabella; Alfredsen, Gry; Filbakk, Tore; Fossdal, Carl Gunnar

    2015-01-01

    The demand for bioenergy caused an increased use of logging residues, branches and treetops that were previously left on the ground after harvesting. Residues are stored outdoors in piles and it is unclear to what extent fungi transform this material. Our objective was to quantify the amount of wood degrading fungi during storage using quantitative real-time PCR (qPCR) to detect basidiomycetous DNA in logging residues, a novel approach in this field. We found that the qPCR method was accurate in quantifying the fungal DNA during storage. As the moisture content of the piled logging residues decreased during the storage period, the fungal DNA content also decreased. Scots pine residues contained more fungal DNA than residues from Norway spruce. Loose piles had generally more fungal DNA than bundled ones. PMID:25870777

  3. CosmicEmuLog: Cosmological Power Spectra Emulator

    NASA Astrophysics Data System (ADS)

    Neyrinck, Mark

    2013-04-01

    CosmicEmuLog is a simple Python emulator for cosmological power spectra. In addition to the power spectrum of the conventional overdensity field, it emulates the power spectra of the log-density as well as the Gaussianized density. It models fluctuations in the power spectrum at each k as a linear combination of contributions from fluctuations in each cosmological parameter. The data it uses for emulation consist of ASCII files of the mean power spectrum, together with derivatives of the power spectrum with respect to the five cosmological parameters in the space spanned by the Coyote Universe suite. This data can also be used for Fisher matrix analysis. At present, CosmicEmuLog is restricted to redshift 0.

  4. Bio-logging of physiological parameters in higher marine vertebrates

    NASA Astrophysics Data System (ADS)

    Ponganis, Paul J.

    2007-02-01

    Bio-logging of physiological parameters in higher marine vertebrates had its origins in the field of bio-telemetry in the 1960s and 1970s. The development of microprocessor technology allowed its first application to bio-logging investigations of Weddell seal diving physiology in the early 1980s. Since that time, with the use of increased memory capacity, new sensor technology, and novel data processing techniques, investigators have examined heart rate, temperature, swim speed, stroke frequency, stomach function (gastric pH and motility), heat flux, muscle oxygenation, respiratory rate, diving air volume, and oxygen partial pressure (P) during diving. Swim speed, heart rate, and body temperature have been the most commonly studied parameters. Bio-logging investigation of pressure effects has only been conducted with the use of blood samplers and nitrogen analyses on animals diving at isolated dive holes. The advantages/disadvantages and limitations of recording techniques, probe placement, calibration techniques, and study conditions are reviewed.

  5. Wireline well logging an underutilized technique in reservoir evaluation

    SciTech Connect

    Mathews, M.

    1981-01-01

    Wireline well logs have three general uses in geothermal exploration and reservoir evaluation: reservoir parameter analysis, lithologic column determination, and reservoir size resolution. Reservoir flow testing data are acquired to understand the flow rate, life, and production potential of the geothermal reservoir. These data are a coarse subsurface measurement of the geothermal prospect. Wireline logs acquired from wells in a geothermal prospect are used to define in detail, or estimate the reservoir parameters of temperature, thickness, lateral size, amount of fracture and intergranular pore space, and the quantity and quality of fluid that might be produced. Laboratory measurements can be made on core samples and drill cuttings samples to define the intrinsic behavior of the materials and fluid that compose the geotheraml reservoir. Wireline log measurements are needed to correlate and link the reservoir testing and core analysis, reduce the amount of time needed for flow testing, and predict the production life (amount of heat and fluid available) in a geothermal field.

  6. Electronic neutron sources for compensated porosity well logging

    NASA Astrophysics Data System (ADS)

    Chen, A. X.; Antolak, A. J.; Leung, K.-N.

    2012-08-01

    The viability of replacing Americium-Beryllium (Am-Be) radiological neutron sources in compensated porosity nuclear well logging tools with D-T or D-D accelerator-driven neutron sources is explored. The analysis consisted of developing a model for a typical well-logging borehole configuration and computing the helium-3 detector response to varying formation porosities using three different neutron sources (Am-Be, D-D, and D-T). The results indicate that, when normalized to the same source intensity, the use of a D-D neutron source has greater sensitivity for measuring the formation porosity than either an Am-Be or D-T source. The results of the study provide operational requirements that enable compensated porosity well logging with a compact, low power D-D neutron generator, which the current state-of-the-art indicates is technically achievable.

  7. DNA quantification of basidiomycetous fungi during storage of logging residues

    PubMed Central

    Alfredsen, Gry; Filbakk, Tore; Fossdal, Carl Gunnar

    2015-01-01

    The demand for bioenergy caused an increased use of logging residues, branches and treetops that were previously left on the ground after harvesting. Residues are stored outdoors in piles and it is unclear to what extent fungi transform this material. Our objective was to quantify the amount of wood degrading fungi during storage using quantitative real-time PCR (qPCR) to detect basidiomycetous DNA in logging residues, a novel approach in this field. We found that the qPCR method was accurate in quantifying the fungal DNA during storage. As the moisture content of the piled logging residues decreased during the storage period, the fungal DNA content also decreased. Scots pine residues contained more fungal DNA than residues from Norway spruce. Loose piles had generally more fungal DNA than bundled ones. PMID:25870777

  8. Annual Logging Symposium, June 19-23, 2010 IMPROVED ESTIMATION OF MINERAL

    E-print Network

    Torres-Verdín, Carlos

    that honor the well logs, their volume of investigation, the process of invasion, and the assumed rock concentrations from well logs, core data, and geological logs are nec- essary for the accurate estimation. Core analysis aided by geological logs is a common approach to diagnose lithology. Earlier detec- tion

  9. 26 CFR 41.4483-6 - Reduction in tax for trucks used in logging.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Reduction in tax for trucks used in logging. 41.4483-6 Section 41.4483-6... Reduction in tax for trucks used in logging. (a) In general. The tax imposed...percent in the case of a truck used in logging. (b) Truck used in logging....

  10. 26 CFR 41.4483-6 - Reduction in tax for trucks used in logging.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Reduction in tax for trucks used in logging. 41.4483-6 Section 41.4483-6... Reduction in tax for trucks used in logging. (a) In general. The tax imposed...percent in the case of a truck used in logging. (b) Truck used in logging....

  11. April 2002 Page 1 of 6 Export credits: Fuelling illegal logging

    E-print Network

    April 2002 Page 1 of 6 Export credits: Fuelling illegal logging Export Credit Agencies (ECAs and indirectly to illegal logging. This briefing note details the relationship between ECAs and illegal logging and argues that, in order to address the problem of illegal logging, the EU cannot limit its activities

  12. Efficient, Compromise Resilient and Append-only Cryptographic Schemes for Secure Audit Logging

    E-print Network

    Ning, Peng

    Efficient, Compromise Resilient and Append-only Cryptographic Schemes for Secure Audit Logging of audit logs, it is vital to provide compro- mise resiliency and append-only properties in a logging system to prevent ac- tive attackers. Unfortunately, existing symmetric secure logging schemes

  13. 26 CFR 41.4483-6 - Reduction in tax for trucks used in logging.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... Reduction in tax for trucks used in logging. 41.4483-6 Section 41.4483-6... Reduction in tax for trucks used in logging. (a) In general. The tax imposed...percent in the case of a truck used in logging. (b) Truck used in logging....

  14. Keystroke Logging in Writing Research: Using Inputlog to Analyze and Visualize Writing Processes

    ERIC Educational Resources Information Center

    Leijten, Marielle; Van Waes, Luuk

    2013-01-01

    Keystroke logging has become instrumental in identifying writing strategies and understanding cognitive processes. Recent technological advances have refined logging efficiency and analytical outputs. While keystroke logging allows for ecological data collection, it is often difficult to connect the fine grain of logging data to the underlying…

  15. 40 CFR 146.66 - Logging, sampling, and testing prior to new well operation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND... cement bond and variable density log, and a temperature log after the casing is set and cemented. (ii... density log, and a temperature log after the casing is set and cemented. (iii) The Director may allow...

  16. Efficient, Compromise Resilient and Append-only Cryptographic Schemes for Secure Audit Logging

    E-print Network

    Young, R. Michael

    entries to be veri- fied or the number of loggers in the system. In addition, a LogFAS variation allows logs, it is vital to provide compromise resiliency and append-only proper- ties in a logging system-based scheme that achieves the optimal verifier computational and storage efficiency. That is, LogFAS can

  17. VerSum: Verifiable Computations over Large Public Logs Jelle van den Hooff

    E-print Network

    blockchains, or a Certificate Transparency log. VERSUM clients ensure that the output is correct by comparing publicly available logs, whose validity is guaranteed. The logs are large (e.g., the Bitcoin blockchain is added to the Bitcoin blockchain). To run computations over these logs requires a Permission to make

  18. Electromagnetic-induction logging to monitor changing chloride concentrations

    USGS Publications Warehouse

    Metzger, Loren F.; Izbicki, John A.

    2013-01-01

    Water from the San Joaquin Delta, having chloride concentrations up to 3590 mg/L, has intruded fresh water aquifers underlying Stockton, California. Changes in chloride concentrations at depth within these aquifers were evaluated using sequential electromagnetic (EM) induction logs collected during 2004 through 2007 at seven multiple-well sites as deep as 268 m. Sequential EM logging is useful for identifying changes in groundwater quality through polyvinyl chloride-cased wells in intervals not screened by wells. These unscreened intervals represent more than 90% of the aquifer at the sites studied. Sequential EM logging suggested degrading groundwater quality in numerous thin intervals, typically between 1 and 7 m in thickness, especially in the northern part of the study area. Some of these intervals were unscreened by wells, and would not have been identified by traditional groundwater sample collection. Sequential logging also identified intervals with improving water quality—possibly due to groundwater management practices that have limited pumping and promoted artificial recharge. EM resistivity was correlated with chloride concentrations in sampled wells and in water from core material. Natural gamma log data were used to account for the effect of aquifer lithology on EM resistivity. Results of this study show that a sequential EM logging is useful for identifying and monitoring the movement of high-chloride water, having lower salinities and chloride concentrations than sea water, in aquifer intervals not screened by wells, and that increases in chloride in water from wells in the area are consistent with high-chloride water originating from the San Joaquin Delta rather than from the underlying saline aquifer.

  19. Reduction of lithologic-log data to numbers for use in the digital computer

    USGS Publications Warehouse

    Morgan, C.O.; McNellis, J.M.

    1971-01-01

    The development of a standardized system for conveniently coding lithologic-log data for use in the digital computer has long been needed. The technique suggested involves a reduction of the original written alphanumeric log to a numeric log by use of computer programs. This numeric log can then be retrieved as a written log, interrogated for pertinent information, or analyzed statistically. ?? 1971 Plenum Publishing Corporation.

  20. Co-analysis of RAS Log and Job Log on Blue Gene/P Ziming Zheng, Li Yu, Wei Tang, Zhiling Lan

    E-print Network

    Lan, Zhiling

    for petascale systems. Reliability, Availability, and Serviceability (RAS) logs have been commonly used that a system administrator can use to understand failures. Thus, RAS logs have received con- siderable management in large- scale systems. Nevertheless, RAS logs typically contain only limited information about

  1. CONTROLLED SUBSTANCE USAGE LOG One log sheet is to be completed for each container of controlled substance. Controlled substance usage must be tracked on a per

    E-print Network

    Ullrich, Paul

    CONTROLLED SUBSTANCE USAGE LOG One log sheet is to be completed for each container of controlled substance. Controlled substance usage must be tracked on a per dose (use) basis. Record total quantity: Initials Dispensed by: Purpose/Comments Usage Log for Controlled Substance: _______________ Continued from

  2. A Generalized Approach for the Interpretation of Geophysical Well Logs in Ground-Water Studies - Theory and Application

    USGS Publications Warehouse

    Paillet, F.L.; Crowder, R.E.

    1996-01-01

    Quantitative analysis of geophysical logs in ground-water studies often involves at least as broad a range of applications and variation in lithology as is typically encountered in petroleum exploration, making such logs difficult to calibrate and complicating inversion problem formulation. At the same time, data inversion and analysis depend on inversion model formulation and refinement, so that log interpretation cannot be deferred to a geophysical log specialist unless active involvement with interpretation can be maintained by such an expert over the lifetime of the project. We propose a generalized log-interpretation procedure designed to guide hydrogeologists in the interpretation of geophysical logs, and in the integration of log data into ground-water models that may be systematically refined and improved in an iterative way. The procedure is designed to maximize the effective use of three primary contributions from geophysical logs: (1) The continuous depth scale of the measurements along the well bore; (2) The in situ measurement of lithologic properties and the correlation with hydraulic properties of the formations over a finite sample volume; and (3) Multiple independent measurements that can potentially be inverted for multiple physical or hydraulic properties of interest. The approach is formulated in the context of geophysical inversion theory, and is designed to be interfaced with surface geophysical soundings and conventional hydraulic testing. The step-by-step procedures given in our generalized interpretation and inversion technique are based on both qualitative analysis designed to assist formulation of the interpretation model, and quantitative analysis used to assign numerical values to model parameters. The approach bases a decision as to whether quantitative inversion is statistically warranted by formulating an over-determined inversion. If no such inversion is consistent with the inversion model, quantitative inversion is judged not possible with the given data set. Additional statistical criteria such as the statistical significance of regressions are used to guide the subsequent calibration of geophysical data in terms of hydraulic variables in those situations where quantitative data inversion is considered appropriate.

  3. Contextualising impacts of logging on tropical rainforest catchment sediment dynamics using the stratigraphic record of in-channel bench deposits

    NASA Astrophysics Data System (ADS)

    Blake, Will; Walsh, Rory; Bidin, Kawi; Annammala, Kogila

    2015-04-01

    It is widely recognised that commercial logging and conversion of tropical rainforest to oil palm plantation leads to enhanced fluvial sediment flux to the coastal zone but the dynamics of delivery and mechanisms that act to retain sediment and nutrients within rainforest ecosystems, e.g. riparian zone and floodplain storage, are poorly understood and underexploited as a management tool. While accretion of lateral in-channel bench deposits in response to forest clearance has been demonstrated in temperate landscapes, their development and value as sedimentary archives of catchment response to human disturbance remains largely unexplored in tropical rainforest river systems. Working within the Segama River basin, Sabah, Malaysian Borneo, this study aimed to test the hypothesis that (1) lateral bench development in tropical rainforest rivers systems is enhanced by upstream catchment disturbance and that (2) the sedimentary record of these deposits can be used to infer changes in sediment provenance and intensification of sediment flux associated with logging activities. Sediment cores were taken from in-channel bench deposits with upstream catchment contributing areas of 721 km2 and 2800 km2 respectively. Accretion rates were determined using fallout 210Pb and 137Cs and the timing of peak accumulation was shown to correspond exactly with the known temporal pattern of logging and associated fluvial sediment response over the period 1980 to present following low pre-logging rates. Major and minor element geochemistry of deposits was used to assess the degree of weathering that deposited sediment had experienced. This was linked to surface (heavily weathered) and subsurface (less weathered) sediment sources relating to initial disturbance by logging and post-logging landsliding responses respectively. A shift in the dominant source of deposited material from surface (i.e. topsoil) to subsurface (i.e. relatively unweathered subsoil close to bedrock) origin was observed to coincide with the increase in accretion rates following logging of steep headwater slopes. Coherence of sedimentary, monitoring and observational evidence demonstrates that in-channel bench deposits offer a previously unexplored sedimentary archive of catchment response to logging in tropical rainforest systems and a tool for evaluating the erosional responses of ungauged basins. In-channel bench development due to catchment disturbance may augment ecosystem services provided by the riparian corridors of larger rivers and process knowledge gained from sedimentary archives can be used to underpin future riparian and catchment forest management strategies.

  4. Geophysical characterization of the Lollie Levee near Conway, Arkansas, using capacitively coupled resistivity, coring, and direct push logging

    USGS Publications Warehouse

    Gillip, Jonathan A.; Payne, Jason D.

    2011-01-01

    A geophysical characterization of Lollie Levee near Conway, Arkansas, was conducted in February 2011. A capacitively coupled resistivity survey (using Geometric's OhmMapper) was completed along the top and toe of the 6.7-mile levee. Two-dimensional inversions were conducted on the geophysical data. As a quality-control measure, cores and direct push logs were taken at approximately 1-mile intervals along the levee. The capacitively coupled resistivity survey, the coring, and the direct push logs were used to characterize the geologic materials. Comparison of the cores and the direct push log data, along with published resistivity values, indicates that resistivity values of 200 Ohm-meters or greater represent relatively clean sand, with decreasing resistivity values occurring with increasing silt and clay content. The cores indicated that the levee is composed of a heterogeneous mixture of sand, silt, and clay. The capacitively coupled resistivity sections confirm that the levee is composed of a heterogeneous mixture of high and low resistivity materials and show that the composition of the levee varies spatially. The geologic materials underlying the levee vary spatially as a result of the geologic processes that deposited them. In general, the naturally deposited geologic materials underlying the levee contain a greater amount of low resistivity materials in the southern extent of the levee.

  5. 1. OVERVIEW OF AREA B OF SITE, SHOWING LOG BUILDING ...

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

    1. OVERVIEW OF AREA B OF SITE, SHOWING LOG BUILDING AND BUNKHOUSE AT LEFT (Features 9 and 10), RUIN AND SHED IN CENTER (Features 11 and 12), AND HOUSE RUIN AT RIGHT (Feature 13), LOOKING EAST-NORTHEAST - Gold Dust Mine, Mill & Camp Complex, Wards Gulch, Salmon, Lemhi County, ID

  6. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 31 Money and Finance:Treasury 3 2012-07-01 2012-07-01 false Round log or timber product. 593.309 Section 593.309 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES...

  7. NBAJOBS Employee Jobs Form 1. Log in to Banner .

    E-print Network

    Hammack, Richard

    NBAJOBS ­ Employee Jobs Form 1. Log in to Banner . 2. Key NBAJOBS in the Go To box and press "Enter on POIIDEN. 4. Click on the Position search function,( - drop down arrow). a. Click List of Employee's Jobs Block, ( or Ctrl/PgDn) to move to the General Job Tab. a. Displays an employee's basic job information

  8. Reader Response Logs as a Learning Device in Literature Classes.

    ERIC Educational Resources Information Center

    Harris, June

    A study determined whether using reader response logs in an introductory college literature class would prove to be an effective method of helping students learn to apply the critical methodology important to increasing understanding of literature. Subjects, 33 undergraduate students enrolled in an introductory literature course, wrote response…

  9. Estimating the Service Time of Web Clients using Server Logs

    E-print Network

    Freitag, Felix

    Estimating the Service Time of Web Clients using Server Logs Oscar Ardaiz Dep. Arquitectura de Freitag Dep. Arquitectura de Computadores Universidad Politécnica de Catalunya Jordi Girona, 1­3, Barcelona (España) felix@ac.upc.es Leandro Navarro Dep. Arquitectura de Computadores Universidad Politécnica

  10. Cleaning Structured Event Logs: A Graph Repair Jianmin Wang

    E-print Network

    Pei, Jian

    , which are manipulated by more than 100 outsourcing companies. Event Name Operator Successor t1 submit MCleaning Structured Event Logs: A Graph Repair Approach Jianmin Wang , Shaoxu Song , Xuemin Lin, Canada jpei@cs.sfu.ca Abstract--Event data are often dirty owing to various record- ing conventions

  11. Experiments Log-Linear Models, Logistic Regression and

    E-print Network

    Jebara, Tony

    Experiments Log-Linear Models, Logistic Regression and Conditional Random Fields February 21, 2013(x,y) Conditional Learning (logistic regression) Choose family of functions p(y|x) parametrized by Find Regression Given input-output iid data (x1, y1), . . . , (xT , yT ) where y {0, 1}. Binary logistic

  12. Adaptive Smoothing of the Log-Spectrum with Multiple Tapering

    E-print Network

    Adaptive Smoothing of the Log-Spectrum with Multiple Tapering #3; K.S. Riedel and A. Sidorenko New periodogram. A data adaptive implementation of a variable bandwidth kernel smoother is given. 1 INTRODUCTION adaptive variable bandwidth implementation of this method. In Section 6, we present our simulation results

  13. Dual-cone double-helical downhole logging device

    DOEpatents

    Yu, Jiunn S. (Albuquerque, NM)

    1984-01-01

    A broadband downhole logging device includes a double-helix coil wrapped over a dielectric support and surrounded by a dielectric shield. The device may also include a second coil longitudinally aligned with a first coil and enclosed within the same shield for measuring magnetic permeability of downhole formations and six additional coils for accurately determining downhole parameters.

  14. 31 CFR 593.309 - Round log or timber product.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 31 Money and Finance:Treasury 3 2014-07-01 2014-07-01 false Round log or timber product. 593.309 Section 593.309 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FORMER LIBERIAN REGIME OF CHARLES...

  15. DEFECT DETECTION ON HARDWOOD LOGS USING LASER SCANNING Liya Thomas

    E-print Network

    Shaffer, Clifford A.

    DEFECT DETECTION ON HARDWOOD LOGS USING LASER SCANNING Liya Thomas PhD Student Department detection methods of external defects have been developed and successfully tested on a large collection from a residual image, the developed methods allow us to detect most severe defects using a combination

  16. Little AFM Cheat Sheet 1. Log in with Coral

    E-print Network

    Devoret, Michel H.

    Little AFM Cheat Sheet 1. Log in with Coral 2. Loosen the clamping screw on the rear of the head that the light hits the ledge next to the tip. Clamp the microscope in place with the big knob on the back

  17. Landslides After Clearcut Logging in a Coast Redwood Forest1

    E-print Network

    163 Landslides After Clearcut Logging in a Coast Redwood Forest1 Leslie M. Reid2 and Elizabeth T. Keppeler2 Abstract Landslides have been mapped at least annually in the 473 ha North Fork Caspar Creek watershed since 1985, allowing evaluation of landslide distribution, characteristics, and rates associated

  18. 14 CFR 121.701 - Maintenance log: Aircraft.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Maintenance log: Aircraft. 121.701 Section 121.701 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED...: Aircraft. (a) Each person who takes action in the case of a reported or observed failure or malfunction...

  19. 14 CFR 121.701 - Maintenance log: Aircraft.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Maintenance log: Aircraft. 121.701 Section 121.701 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED...: Aircraft. (a) Each person who takes action in the case of a reported or observed failure or malfunction...

  20. 14 CFR 121.701 - Maintenance log: Aircraft.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Maintenance log: Aircraft. 121.701 Section 121.701 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED...: Aircraft. (a) Each person who takes action in the case of a reported or observed failure or malfunction...