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1

Thomas Cao  

Center for Drug Evaluation (CDER)

Text Version... Food and Drug Administration Silver Spring, MD 20993 April 5, 2012 Thomas Cao, MD 1435 North Randall Road, Suite #402 Elgin, IL 60123 ... More results from www.fda.gov/downloads/drugs/drugsafety

2

Experiments for on-line bearing-only target localization in acoustic array sensor networks  

Microsoft Academic Search

In this paper, we present a bearing-only on-line target localization platform, and succeed to realize the whole process of target localization. In the experiment, five nodes are used to send their moving target bearing line data to a base station which adopts asynchronous pseudolinear (APL) estimator for localization. The performance of Direction-of-arrival (DOA) estimation is analyzed in both cases of

Ji-an Luo; Dahang Feng; Shantao Chen; Peng Zhang; Ming Bao; Zhi Wang

2010-01-01

3

Recent studies to improve release properties from thick isotope separator on-line fission targets  

NASA Astrophysics Data System (ADS)

In the framework of the PARRNe program (Production d'Atomes Radioactifs Riches en Neutrons) of IPN Orsay, various techniques are currently used to characterize the release properties of elements of interest from a UCX target. On-line studies have been carried out with two plasma ion sources: a Nier-Bernas and a hot plasma ISOLDE-type (the ISOLDE collaboration kindly supplied us a MK5 ion source for these studies). In parallel, the analysis of the chemical and structure properties of some UCX samples as function of heating conditions has been carried out. Such data are essential to determine optimal conditions for the production of isotopes by the isotope separator on-line (ISOL) technique. First results are presented here for Kr and Ag. Investigations for other kinds of fission targets are planned.

Lau, C.; Roussière, B.; Verney, D.; Bajeat, O.; Ibrahim, F.; Clapier, F.; Cottereau, E.; Donzaud, C.; Ducourtieux, M.; Essabaa, S.; Guillemaud-Mueller, D.; Hosni, F.; Lefort, H.; Le Blanc, F.; Mueller, A. C.; Obert, J.; Pauwels, N.; Potier, J. C.; Pougheon, F.; Proust, J.; Sauvage, J.; Wojtasiewicz, A.

2003-05-01

4

Audience selection for on-line brand advertising: privacy-friendly social network targeting  

Microsoft Academic Search

This paper describes and evaluates privacy-friendly methods for extracting quasi-social networks from browser behavior on user-generated content sites, for the purpose of finding good audiences for brand advertising (as opposed to click maximizing, for example). Targeting social-network neigh- bors resonates well with advertisers, and on-line browsing behavior data counterintuitively can allow the identification of good audiences anonymously. Besides being one

Foster J. Provost; Brian Dalessandro; Rod Hook; Xiaohan Zhang; Alan Murray

2009-01-01

5

Imaging Ultrasound Guidance and on-line Estimation of Thermal Behavior in HIFU Exposed Targets  

NASA Astrophysics Data System (ADS)

Elevated temperatures have been used for many years to combat several diseases including treatment of certain types of cancers/tumors. High Intensity Focused Ultrasound (HIFU) has emerged as a potential non-invasive modality for trackless targeting of deep-seated cancers of human body. For the procedures which require thermal elevation such as hyperthermia and tissue ablation, temperature becomes a parameter of vital importance in order to monitor the treatment on-line. Also, embedding invasive temperature probes for this purpose beats the supremacy of the non-invasive ablating modality. In this paper, we describe the use of a non-invasive and inexpensive conventional imaging ultrasound modality for lesion positioning and estimation of thermal behavior of the tissue on exposure to HIFU. Representative results of our online lesion tracking algorithm for discerning lesioning behavior using image capture, processing and phase-shift measurements are presented.

Chauhan, Sunita; Haryanto, Amir

2006-05-01

6

On-Line Target Position Localization in the Presence of Respiration: A Comparison of two Methods  

SciTech Connect

Purpose: To compare two 'four-dimensional' methods for image-guided target localization in the presence of respiration. Methods and Materials: Four-dimensional image guidance was performed with two methods. A respiration-correlated computed tomography (RCCT) was acquired on a CT simulator, and an average CT (AVG-CT) image was generated from the RCCT. A respiration-correlated cone-beam CT (RC-CBCT) and a free-breathing cone-beam CT (FB-CBCT) were acquired. The 'RCCT method' consisted of calculating the mean target position on both the RCCT and RC-CBCT, registering the RCCT to the RC-CBCT, and determining the shift in the mean target position from the planned mean position. The 'AVG-CT method' consisted of registering the AVG-CT to the FB-CBCT. The ability of each to measure the shift in the mean target position was compared, both in a respiratory phantom and in 8 patients. Results: In phantom, the RCCT and AVG-CT methods were able to measure the true mean target position to within 0.15 cm and 0.10 cm, respectively. In the patient study, the mean error between the methods was 0.13 cm (left-right), 0.14 cm (anterior-posterior), and 0.10 cm (cranio-caudal). The error was not observed to vary with tumor position or magnitude of tumor motion. Conclusions: Respiration may impact the on-line image guidance process. The RCCT method enables localization of the mean tumor position and measurement of changes in the motion pattern, whereas the AVG-CT method is simple, fast, and easily implemented. We found the methods to be nearly equivalent in detecting shifts in the mean tumor position.

Hugo, Geoffrey D. [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States)], E-mail: ghugo@beaumont.edu; Liang Jian; Campbell, Jonathan; Yan Di [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States)

2007-12-01

7

Total on-line analysis of a target protein from plasma by immunoextraction, digestion and liquid chromatography–mass spectrometry  

Microsoft Academic Search

A total on-line analysis of a target protein from a plasma sample was made using a selective immunoextraction step coupled on-line to an immobilized enzymatic reactor (IMER) for the protein digestion followed by LC–MS\\/MS analysis. For the development of this device, cytochrome c was chosen as model protein due to its well-known sequence. An immunosorbent (IS) based on the covalent

A. Cingöz; F. Hugon-Chapuis; V. Pichon

2010-01-01

8

Imaging Ultrasound Guidance and on-line Estimation of Thermal Behavior in HIFU Exposed Targets  

Microsoft Academic Search

Elevated temperatures have been used for many years to combat several diseases including treatment of certain types of cancers\\/tumors. High Intensity Focused Ultrasound (HIFU) has emerged as a potential non-invasive modality for trackless targeting of deep-seated cancers of human body. For the procedures which require thermal elevation such as hyperthermia and tissue ablation, temperature becomes a parameter of vital importance

Sunita Chauhan; Amir Haryanto

2006-01-01

9

The Oxygenase CAO-1 of Neurospora crassa Is a Resveratrol Cleavage Enzyme.  

PubMed

The genome of the ascomycete Neurospora crassa encodes CAO-1 and CAO-2, two members of the carotenoid cleavage oxygenase family that target double bonds in different substrates. Previous studies demonstrated the role of CAO-2 in cleaving the C40 carotene torulene, a key step in the synthesis of the C35 apocarotenoid pigment neurosporaxanthin. In this work, we investigated the activity of CAO-1, assuming that it may provide retinal, the chromophore of the NOP-1 rhodopsin, by cleaving ?-carotene. For this purpose, we tested CAO-1 activity with carotenoid substrates that were, however, not converted. In contrast and consistent with its sequence similarity to family members that act on stilbenes, CAO-1 cleaved the interphenyl C?-C? double bond of resveratrol and its derivative piceatannol. CAO-1 did not convert five other similar stilbenes, indicating a requirement for a minimal number of unmodified hydroxyl groups in the stilbene background. Confirming its biological function in converting stilbenes, adding resveratrol led to a pronounced increase in cao-1 mRNA levels, while light, a key regulator of carotenoid metabolism, did not alter them. Targeted ?cao-1 mutants were not impaired by the presence of resveratrol, a phytoalexin active against different fungi, which did not significantly affect the growth and development of wild-type Neurospora. However, under partial sorbose toxicity, the ?cao-1 colonies exhibited faster radial growth than control strains in the presence of resveratrol, suggesting a moderate toxic effect of resveratrol cleavage products. PMID:23893079

Díaz-Sánchez, Violeta; F Estrada, Alejandro; Limón, M Carmen; Al-Babili, Salim; Avalos, Javier

2013-07-26

10

Recent developments and on-line tests of uranium carbide targets for production of nuclides far from stability  

NASA Astrophysics Data System (ADS)

The capacity of uranium carbide target materials of different structure and density for production of neutron-rich and heavy neutron-deficient nuclides have been investigated. The yields of Cs and Fr produced by a 1 GeV proton beam of the PNPI synchrocyclotron and release properties of different targets have been measured. Yields and release efficiencies of Cs and Fr produced from a high density UC target material and from low density UCx prepared by the ISOLDE method at IRIS in the collaboration with PARRNe group from Orsay are compared. The yields from ISOLDE original target are presented for comparison as well.

Panteleev, V. N.; Alyakrinskiy, O.; Andrighetto, A.; Barzakh, A. E.; Dubois, M.; Eleon, C.; Essabaa, S.; Bajeat, O.; Fedorov, D. V.; Gaubert, G.; Ionan, A. M.; Ivanov, V. S.; Jardin, P.; Lanchais, A.; Lau, C.; Leroy, R.; Lhersonneau, G.; Mhamed, C.; Mezilev, K. A.; Molkanov, P. L.; Moroz, F. V.; Orlov, S. Yu.; Rizzi, V.; Saint Laurent, M. G.; Stroe, L.; Tecchio, L. B.; Villari, A. C. C.; Volkov, Yu. M.

2007-11-01

11

CAOS: Code for Adaptive Optics Systems  

NASA Astrophysics Data System (ADS)

The CAOS "system" (where CAOS stands for Code for Adaptive Optics Systems) is properly said a Problem Solving Environment (PSE). It is essentially composed of a graphical programming interface (the CAOS Application Builder) which can load different packages (set of modules). Current publicly distributed packages are the Software Package CAOS (the original adaptive optics package), the Software Package AIRY (an image-reconstruction-oriented package - AIRY stands for Astronomical Image Restoration with interferometrY), the Software Package PAOLAC (a simple CAOS interface for the analytic IDL code PAOLA developed by Laurent Jolissaint - PAOLAC stands for PAOLA within Caos), and a couple of private packages (not publicly distributed but restricted to the corresponding consortia): SPHERE (especially developed for the VLT planet finder SPHERE), and AIRY-LN (a specialized version of AIRY for the LBT instrument LINC-NIRVANA). Another package is also being developed: MAOS (that stands for Multiconjugate Adaptive Optics Simulations), developed for multi-reference multiconjugate AO studies purpose but still in a beta-version form.

Carbillet, M.; Verinaud, C.; Femenia, B.; Riccardi, A.; Fini, L.

2011-06-01

12

Accurate Procedure for Calibrating the CAO Optical Hygrometer.  

National Technical Information Service (NTIS)

Two hygrometers of the Central Aerological Observatory (CAO) (Russia) were calibrated with respect to the partial pressure of water vapor. Optical hygrometers from the CAO are designed for measuring water vapor at heights above 10 km. They use the fluores...

J. Gumbel U. Waelchli M. Kretova

1992-01-01

13

Development of new CaO based sorbent materials for CO 2 removal at high temperature  

Microsoft Academic Search

This study focuses on developing a CO2 sorbent with high sorption capacity (higher than 6mol\\/kg of sorbent) and long life-time. The target value of the sorption capacity was attained by screening and testing two different microporous CaO precursors, Ca(OH)2 and Ca(CH3COO)2. Between them, calcined calcium acetate showed the highest CO2 uptake ability, 50% increase of the weight of the sorbent

Christina S. Martavaltzi; Angeliki A. Lemonidou

2008-01-01

14

Antimicrobial activity of caO nanoparticles.  

PubMed

The high degree of microbial diseases and their multidrug resistant properties make the researchers to develop new class of antimicrobial agents. A modern and innovative approach of drug development is the use of metallic nanoparticles as new formulations of antimicrobial agents. In this study, microwave irradiated CaO nanoparticles (CaO-NPs) were used to determine their antimicrobial efficacy against gram negative and gram positive bacteria, as well as pathogenic yeast. The physiochemical properties of CaO-NPs were characterized by means of X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The nanoparticles consist of well dispersed agglomerates of grains with a narrow size distribution of 14-24 nm. The prepared CaO-NPs showed much higher antimicrobial activity against Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus epidermidis (MTCC 435) in comparision to Candida tropicalis (NCIM 3110). The minimum inhibitory concentration (MIC) value of CaO-NPs was found within the range of 2-8 mM for all the above tested strains. This bioactive nanoparticle also inhibits the biofilm formation and may have future applications cheap and non toxic as antimicrobial drug for skin care product development. PMID:23980504

Roy, Arup; Gauri, Samiran S; Bhattacharya, Madhusmita; Bhattacharya, Jayanta

2013-09-01

15

On-Line Nutrition.  

ERIC Educational Resources Information Center

|Several sources of nutrition information are available on the Internet. Good online sources include the U.S. Department of Agriculture Food and Consumer Service bulletin board, the Food and Drug Administration's Center for Food Safety and Applied Nutrition, and the IFIC (International Food Information Council) Foundation On-Line. E-mail addresses…

Kongshem, Lars

1995-01-01

16

Are Lateral Electronic Portal Images Adequate for Accurate On-Line Daily Targeting of the Prostate? Results of a Prospective Study  

SciTech Connect

The purpose of this report was to evaluate the magnitude of the error that would be introduced if only a lateral (LAT) portal image, as opposed to a pair of orthogonal images, was used to verify and correct daily setup errors and organ motion in external beam radiation therapy (EBRT) of prostate cancer. The 3-dimensional (3D) coordinates of gold markers from 12 consecutive prostate patients were reconstructed using a pair of orthogonal images. The data were re-analyzed using only the LAT images. Couch moves from the 2-dimensional (2D)-only data were compared with the complete 3D data set. The 2D-only data provided couch moves that differed on average from the 3D data by 2.3 {+-} 3.0, 0.0 {+-} 0.0, and 0.8 {+-} 1.0 mm in the Lat, AP, and SI directions, respectively. Along AP and SI axes, the LAT image provided positional information similar to the orthogonal pair. The error along the LAT axis may be acceptable provided lateral margins are large enough. A LAT-only setup protocol reduces patient treatment times and increases patient throughput. In most circumstances, with exceptions such as morbidly obese patients, acquisition of only a LAT image for daily targeting of the prostate will provide adequate positional precision.

Lometti, Michael W. [Department of Radiation Oncology, University of California San Francisco Comprehensive Cancer Center, San Francisco, CA (United States); Physics and Astronomy Department, San Francisco State University, San Francisco, CA (United States)], E-mail: Lometti@radonc17.ucsf.edu; Thurston, Damon [Department of Radiation Oncology, University of California San Francisco Comprehensive Cancer Center, San Francisco, CA (United States); Physics and Astronomy Department, San Francisco State University, San Francisco, CA (United States); Aubin, Michele; Bock, Andrea; Verhey, Lynn [Department of Radiation Oncology, University of California San Francisco Comprehensive Cancer Center, San Francisco, CA (United States); Lockhart, James M.; Bland, Roger [Physics and Astronomy Department, San Francisco State University, San Francisco, CA (United States); Pouliot, Jean; Roach, Mack [Department of Radiation Oncology, University of California San Francisco Comprehensive Cancer Center, San Francisco, CA (United States)

2008-04-01

17

On-Line Expeditions  

NSDL National Science Digital Library

On-line expeditions explores the ocean depths by introducing deep-sea research with interactive features, photos, audio and video clips and middle/high school classroom participation. The topics covered include deep sea geology and hydrothermal vents; history of deep-sea exploration and technology; hydrography and chemical oceanography; marine life and more. Teachers can access a resource guide and activities. The period of time covered is from 2000 to 2004.

18

Dinosauria On-line  

NSDL National Science Digital Library

Dinosauria On-line contains an omnipedia, which includes a dictionary of paleontological terms, an anatomical dictionary, a guide to paleontological writing, and a map of ancient Earth. There are articles on Archaeopteryx, ancient birds, dinosaur-bird relationships, Dromaeosaurid anatomy, dinosaur evolution and fossilization, impact theories and extinction events, legal issues of fossil collecting and teaching evolution, oviraptorids, tyrannosaurids, pliosaurs, and more. There is also a gallery of photographs and artistic drawings of dinosaur fossils.

Poling, Jeff

1995-09-01

19

On-Line Expeditions  

NSDL National Science Digital Library

On-line expeditions explores the ocean depths by introducing deep-sea research with interactive features, photos, audio and video clips and middle/high school classroom participation. The topics covered include deep sea geology and hydrothermal vents; history of deep-sea exploration and technology; hydrography and chemical oceanography; marine life and more. Teachers can access a resource guide and activities. The period of time covered is from 2000 to 2004.

2010-11-22

20

Psychiatry On-Line  

NSDL National Science Digital Library

The field of psychiatry is one that is vast and rather complex, and fortunately for academics and practitioners in the field, the Psychiatry On-Line Web site provides a well-conceived international forum for the discipline. Edited and maintained since 1994 by Dr. Ben Green (a licensed psychiatrist in the United Kingdom), the site features peer-reviewed articles, papers, and case reports from around the world. Part of the Priory group, Psychiatry On-Line contains links to other germane online journals, including the Italian and Brazilian counterparts to the English-language version of Psychiatry On-Line. Visitors will want to browse the archives of previously featured papers, which are thematically organized under topics ranging from affective disorders to substance abuse. The general public will find the section Psychiatry in the Cinema of note, as Dr. Green offers commentary on the depiction of persons with psychiatric conditions (such as schizophrenia) in films like "A Beautiful Mind" and "As Good as it Gets."

21

The CAOS problem-solving environment: recent developments  

NASA Astrophysics Data System (ADS)

We present recent developments of the CAOS problem-solving environment (PSE), an IDL-based software tool whose original aim was to define and simulate as realistically as possible the behavior of a generic adaptive optics (AO) system -from the atmospheric propagation of light, to the sensing of the wave-front aberrations and the correction through a deformable mirror- but which results in a widely more general tool now. In fact, the different developments made through the last years result in a very versatile numerical tool complete of a global graphical interface (the CAOS Application Builder), a general utilities library (the CAOS Library), and different packages dedicated to a wide range of astronomical-optics-related scientific topics: the original package designed for end-to-end AO system simulations (the Software Package CAOS), an image simulation/ reconstruction package with interferometric capabilities (the Software Package AIRY), an extension of the latter specialized for the LBT instrument LINC-NIRVANA (the Software Package AIRY-LN), an ad hoc package dedicated to the VLT instrument SPHERE (the Software Package SPHERE), and an embedment of the analytical AO simulation code PAOLA (the Software Package PAOLAC).We present the status of the whole CAOS PSE, together with the most recent developments, and plans for the future of the overall tool.

Carbillet, Marcel; Desiderà, Gabriele; Augier, Evelyne; La Camera, Andrea; Riccardi, Armando; Boccaletti, Anthony; Jolissaint, Laurent; Ab Kabir, Diyana

2010-07-01

22

Total efficiency of an isotope-separator-on-line production system based on an electron cyclotron resonance ion source associated with a carbon target: The case of SPIRAL 1  

SciTech Connect

An original approach to the time behavior of an isotope-separator-on-line production system is proposed in the case of a production system where the target and the ion source are connected through a conductance much larger than that of the exit hole of the source. One major goal of this article is to derive the analytical expression of the response time of the system for noble gases from statistical parameters only, which can be deduced from a few simple measurements. The validity limits of the expression of the total efficiency are given, and the calculations are compared to the results obtained at GANIL during operation of SPIRAL 1, using a carbon target close coupled to a multicharged electron cyclotron resonance ion source. The final analytical expression for the total efficiency shows that the usual product of diffusion efficiency, effusion efficiency, and ionization efficiency cannot be applied in our case. We show how it is possible to predict the atom-to-ion transformation efficiency for radioactive isotopes of noble gas using response times measured for stable isotopes.

Jardin, P.; Eleon, C.; Farabolini, W.; Boilley, D.; Dubois, M.; Gaubert, G.; Cornell, J.C.; Huet-Equilbec, C.; Lecesne, N.; Leroy, R.; Pacquet, J.Y.; Saint Laurent, M.G.; Villari, A.C.C. [Grand Accelerateur National d' Ions Lourds (GANIL), Boulevard Henri Becquerel, B. P. 55027, 14076 Caen Cedex 5 (France); Centre d' Etudes Nucleaires (CEN) de Saclay, 91191 Gif sur Yvette Cedex (France); Grand Accelerateur National d' Ions Lourds (GANIL), Boulevard Henri Becquerel, B. P. 55027, 14076 Caen Cedex 5 (France)

2006-03-15

23

Un caos perfecto: El cine de Emir Kusturica  

Microsoft Academic Search

Desentrañar la vida de este cineasta, capaz de conv ertir el caos en perfección, es una tortura exquisita sólo para quien tenga en el c uerpo una sobredosis de él suficiente como para soportarla. Aunque su nombre ya está inserto en la historia del séptimo arte como el director que más premios ha ganado en el Festival de Cannes, el

Evelyn ERLIJ

24

XPS Study of CaO in Sodium Silicate Glass.  

National Technical Information Service (NTIS)

This paper shows that CaO added to silicate glasses behaves much like Na sub 2 O in converting bridging oxygen sites to nonbridging sites. Good correspondence with model predictions was obtained but deviations were still sufficiently large to warrant atte...

B. W. Veal D. J. Lam A. P. Paulikas W. Y. Ching

1981-01-01

25

INVESTIGATION OF PRODUCT-LAYER DIFFUSIVITY FOR CAO SULFATION  

EPA Science Inventory

The paper gives results of comparisons of the sulfation rates of CaO prepared from Ca(OH)2 and CaCO3, using six types of each precursor derived from the same natural limestones. The particles were small enough to eliminate all transport resistances except diffusion through the Ca...

26

The Investigation on the Carbonation of CaO in FBC  

Microsoft Academic Search

Limestone is usually be used as a sorbent for capture of sulphur dioxide, but, almost half of CaO will not reacted with SO2 in FBC. So, when the fly ash that contains CaO cools to bellow the calcination temperature, carbonation of CaO in fly ash that deposited on cool surfaces may occur. In this study, CaO was carbonated in a

Chunbo Wang; Guang Lu; Chunchang Song

2010-01-01

27

First-principle investigations of CaO (1 0 0) surface and adsorption of H 2O on CaO (1 0 0)  

Microsoft Academic Search

The results of first-principles calculations about (100) surface of CaO and adsorption of water molecules on the CaO (100) have been presented. Both surface parameters (atomic structures and electronic configurations) and adsorption parameters (bond, charge and energy) of H2O on CaO (100) surface are obtained using density functional theory calculations with the generalized gradient approximation (DFT–GGA). It is found that

Wei Dai; Zhong-He Shui; Kai Li

2011-01-01

28

On-Line Planarity Testing  

Microsoft Academic Search

The on-line planarity-testing problem consists of performing the following operations on a planar graph G: (i) testing if a new edge can be added to G so that the resulting graph is itself planar; (ii) adding vertices and edges such that planarity is preserved. An efficient technique for on- line planarity testing of a graph is presented that uses O(n)

Giuseppe Di Battista; Roberto Tamassia

1996-01-01

29

On-line social search  

US Patent & Trademark Office Database

Example methods, apparatuses, or articles of manufacture are disclosed that may be implemented using one or more computing devices to facilitate or otherwise support one or more processes or operations in connection with performing information searches, such as, for example, domain-specific on-line searches using social survey-type queries.

2013-07-09

30

Chemometrics/on-line measurements  

SciTech Connect

The possible future of on-line analytical-quality measurements for improved process control and more timely safeguards measurements is examined in the light of a current project at Savannah River. A measurement system involving a fiber-optic spectrophotometer and the application of mathematical techniques called chemometrics is described.

O'Rourke, P.E. (Savannah River Lab., Aiken, SC (USA))

1989-11-01

31

Haemodialysis with on-line monitoring equipment: tools or toys?  

Microsoft Academic Search

Background. On-line monitoring of chemical\\/physical signals during haemodialysis (HD) and bio-feedback represents the first step towards a 'physiological' HD system incorporating adaptive and logic controls in order to achieve pre-set treatment targets. Methods. Discussions took place to achieve a con- sensus on key points relating to on-line monitoring and bio-feedback, focusing on the clinical applications. Results. The relative blood volume

Francesco Locatelli; Umberto Buoncristiani; Bernard Canaud; Hans Kohler; Thierry Petitclerc; Pietro Zucchelli

32

On-line signature verification  

Microsoft Academic Search

We describe a method for on-line handwritten signature verification. The signa-tures are acquired using a digitizing tablet which captures both dynamic and spatialinformation of the writing. After preprocessing the signature, several features are ex-tracted. The authenticity of a writer is determined by comparing an input signatureto a stored reference set (template) consisting of three signatures. The similaritybetween an input signature

Anil K. Jain; Friederike D. Griess; Scott D. Connell

2002-01-01

33

On-line secret sharing  

Microsoft Academic Search

In a perfect secret sharing scheme the dealer distributes shares to participants so that qualified subsets can recover the\\u000a secret, while unqualified subsets have no information on the secret. In an on-line secret sharing scheme the dealer assigns\\u000a shares in the order the participants show up, knowing only those qualified subsets whose all members she has seen. We often\\u000a assume

László Csirmaz; Gábor Tardos

34

COMPARATIVE SO2 REACTIVITY OF CAO DERIVED FROM CACO3 AND CA(OH)2  

EPA Science Inventory

Experimental data on sulfation rates of CaO particles derived from CaCO3 are compared to those derived from Ca(OH)2 using a product layer diffusion control model differing only in the shape of the CaO grain. Both the model and the experimental data indicate slightly higher reacti...

35

COMPARATIVE SO2 REATIVITY OF CAO DERIVED FROM CACO3 AND CA(OH)2  

EPA Science Inventory

The paper gives results of a Comparison of experimental data on sulfation rates of CaO particles derived from CaC03 with those derived from Ca(OH)2 using a product layer diffusion control model differing only in the shape of the Cao grain. Both the model and the experimental data...

36

Interdiffusion in NiO, CaO, AND MgO Single Crystals.  

National Technical Information Service (NTIS)

Citation interdiffusion was investigated in single crystals of NiO, CaO, and MgO in the temperature range 1300C-1700C. The excess cation vacancies present in NiO in air cause diffusion to proceed more rapidly in NiO than in either CaO or MgO. This in turn...

M. Appel

1968-01-01

37

UNISOR on-line nuclear orientation facility (UNISOR/NOF)  

SciTech Connect

The UNISOR on-line nuclear orientation facility (UNISOR/NOF) consists of a /sup 3/He--/sup 4/He dilution refrigerator on line to the isotope separator. Nuclei are implanted directly into a target foil which is soldered to the bottom accessed cold finger of the refrigerator. A 1.5 T superconducting magnet polarizes the ferromagnetic target foils and determines the axis of symmetry. Up to eight gamma detectors can be positioned around the refrigerator, each 9 cm from the target. A unique feature of this system is that the k = 4 term in the directional distribution function can be directly and unambiguously deduced so that a single solution for the mixing ratio can be found. The first on-line experiment at this facility reported here was a study of the decay of the /sup 191/Hg and /sup 193/Hg isotopes. 5 refs., 4 figs., 1 tab.

Girit, I.C.; Alton, G.D.; Bingham, C.R.; Carter, H.K.; Simpson, M.L.; Cole, J.D.; Croft, W.L.; Hamilton, J.H.; Jones, E.F.; Gore, P.M.

1988-01-01

38

Dispatch Magazine On-line  

NSDL National Science Digital Library

Dispatch Magazine On-Line features a variety of information for dispatchers and public safety telecommunicators. Students, teachers, and professionals in this field communicate on this web site through the forum and discuss such topics as dispatch training, policy, and management. Also, under the "Essential Links", visitors will find helpful information about staffing, professional development events, 911 communications, and stress management. There is also a collection of videos, primarily from newscasts, relevant to the dispatch field that address dispatching during 9-11, and possible understaffing in cases of emergency. The "Essential Links" section takes visitors to a host of necessary external resources for dispatchers and telecommunicators, including maps, weather, and disaster information.

2006-11-26

39

On-line coal analyzer  

SciTech Connect

A method and apparatus for on-line analysis of a coal sample. Four radial arms extend from the output shaft of an indexing motor. Sample cups at the ends of the arms are indexed along a circular path past a filling station where the cup is filled with pulverized coal, an analyzing station where various chemical analyses are performed on the coal sample, a dumping station where the residue of the coal sample is dumped for disposal, and a cleaning station where the sample cup is cleaned in preparation for another analysis cycle.

Bohl, T.L.

1985-12-31

40

World Competitiveness On-line  

NSDL National Science Digital Library

This site houses the on-line version of the World Competitiveness Yearbook published by IMD (International Institute for Management Development). The Yearbook aims to "capture in a single index the capacity of a country's economic structure to promote growth." The index of competitiveness is based on 244 indicators of international competitiveness which are grouped into eight factors: domestic economy, internationalization, government, finance, infrastructure, management, science and technology, and people. A total of 46 countries consisting of the 28 Organization for Economic Cooperation and Development (OECD) countries and 18 newly industrializing and emerging countries are ranked. At the site, the overall rankings, rankings in each of the factors and individual country profiles are available.

1997-01-01

41

Theoretical Study of the Rovibronic States of CaO  

NASA Astrophysics Data System (ADS)

The spin-rovibronic energy levels of CaO, which result from the couplings of X1?+, a3?, A?1?, b3?+, and A1?+ low-lying electronic states, are determined from wave packet time propagations and Prony analysis. The electronic potentials were taken from our previous study [Chem. Phys., 386, 50 (2011)]. The spin-orbit and L^ coupling functions were determined by CASSCF and MRCI calculations. The effects of spin-orbit coupling on vibrational levels were analyzed in the ? = 0+, 0-, 1 coupling schemes. All spin-vibronic energy levels associated with the a3?, A?1?, b3?+, and A1?+ states were determined up to 16 000 cm-1 above the electronic ground-state minimum. The results obtained from the spin-orbit coupling functions are in remarkable agreement with the experimental data extracted using a deperturbation procedure. The final energies calculated for J = 2 and J = 25 are used to compare the experimental observations concerning the X1?+-A1?+ transition.

Khalil, H.; Le Quéré, F.; Brites, V.; Léonard, C.

2012-01-01

42

THE INFLUENCE OF CaO REACIVITY ON FORMATION OF LOW-BASE CALCIUM SILICATE HYDRATES  

Microsoft Academic Search

The influence of CaO reactivity on the calcium sili cate hydrates formation in the CaO - SiO 2?nH 2O - H 2O system when molar CaO\\/SiO 2 ratio equal to 0.83 and 1.0 was determined. It was identified that in pure CaO - SiO 2?nH 2O - H 2O system with CaO\\/SiO 2 = 0.83, C-S-H(I) is rather stable and

K. Baltakys; E. PRICHOCKIENE

2010-01-01

43

Expanding Academic Vocabulary with an Interactive On-Line Database  

ERIC Educational Resources Information Center

|University students used a set of existing and purpose-built on-line tools for vocabulary learning in an experimental ESL course. The resources included concordance, dictionary, cloze-builder, hypertext, and a database with interactive self-quizzing feature (all freely available at www.lextutor.ca). The vocabulary targeted for learning consisted…

Horst, Marlise; Cobb, Tom; Nicolae, Ioana

2005-01-01

44

List of On-Line Resources.  

ERIC Educational Resources Information Center

Presents an annotated bibliography of 57 World Wide Web sites grouped by subjects, including language arts curricula and pedagogy, writing tools, "fun" writing tools, on-line libraries, on-line books, miscellaneous on-line collections, language arts indexes, technology planning guides, technology plan examples, censorship and copyrights, and…

Teachers & Writers, 1996

1996-01-01

45

CaO interaction in the staged combustion of coal  

SciTech Connect

The LIMB (limestone injection multi-stage burner) process offers special potential for reducing NO/sub x/ and SO/sub x/ by at least 50 percent in coal combustion. This is to be accomplished by adding limestone with fuel and/or air in a low NO/sub x/ burner. This program has been directed to defining the chemistry and kinetics necessary to optimize sulfur capture in LIMB combustion. More specifically, this program has attempted to clarify the role of calcium sulfide in LIMB chemistry. When limestone is added in a staged burner, there is a strong possibility that under certain circumstances CaS is produced in the reducing (fuel-rich) zone of the burner. Since CaS is more stable than CaSO/sub 4/, this affords the opportunity to (1) operate the burner at a higher temperature, 2200 to 2500 F, (2) pass the CaS rapidly through the high temperature zone (before dissociation), and (3) complete the combustion in a lean (air-rich) region where the sulfur is finally retained in CaSO/sub 4/. For these reasons this program has concentrated on the high temperature chemistry and kinetics of CaS. To achieve the program objective, the program was divided into three tasks. These involved (1) a study of CaS formation, (2) a brief examination of CaS oxidation, and (3) a laboratory examination of the combustion of coal in the presence of CaO under first stage, fuel-rich conditions. In the most general sense, the study has shown that the formation of CaS in the reducing zones of the burner may be restricted by competing kinetics and thermodynamics. The addition of lime in LIMB will require special care to optimize the ability to capture sulfur. 36 references, 44 figures, 10 tables.

Levy, A.; Merryman, E.L.; Rising, B.W.

1983-12-19

46

Variations in Compressive Strength of Geopolymer due to the CaO Added Fly Ash  

NASA Astrophysics Data System (ADS)

Recently, geopolymer has been a noteworthy material which can be used as a replacement for portland cement. The mechanical characteristics and consistency of the geopolymer are strongly affected by its chemical components of fly ash. The variations in compressive strength of geopolymer due to the CaO added fly ash were investigated in this paper. The compressive strengths of geopolymer were increased with an increase in the curing period, and the characteristics changed from the one of plastic soil material to brittle material such as concrete, regardless of CaO content. Also, the results of compressive strength and modulus of deformation showed their maximum value in the case of 8-10% CaO content. From this result, the maximum characteristics of the strengths were assumed to be exerted in case which the water draining process of geopolymer was balanced with the water absorbing process of additional CaO.

Zhao, Yuqing; Koumoto, Tatsuya; Kondo, Fumiyoshi

47

Measurement of secondary ionization coefficient of CaO film electrode  

NASA Astrophysics Data System (ADS)

The secondary ionization coefficient ? of a CaO film electrode is investigated taking into account the difference in breakdown voltage obtained by repeated voltage applications. Such measurement is performed under a sinusoidal voltage of 0.5 Hz. If the CaO film electrode acts as the cathode, breakdown voltage gradually decreases and converges to an almost constant value after several breakdowns. From the obtained results, the ? of the CaO film electrode is determined for each breakdown using Townsend's criterion. The ? in the first breakdown is lower than those in subsequent breakdowns, particularly in the steady state. The difference in ? is considered to originate from accumulated charges on the CaO film electrode. Contribution to the Topical Issue "13th International Symposium on High Pressure Low Temperature Plasma Chemistry (Hakone XIII)", Edited by Nicolas Gherardi, Henryca Danuta Stryczewska and Yvan Ségui.

Suzuki, Susumu; Kashiwagi, Yasuhide; Itoh, Haruo

2013-02-01

48

Assessment of CAOS as a training model in spinal surgery: a randomised study  

Microsoft Academic Search

The objectives of this study were (1) to quantify the benefit of computer assisted orthopaedic surgery (CAOS) pedicle screw\\u000a insertion in a porcine cadaver model evaluated by dissection and computed tomography (CT); (2) to compare the effect on performance\\u000a of four surgeons with no experience of CAOS, and varying experience of pedicle screw insertion; (3) to see if CT with

P. J. Richards; I. C. Kurta; V. Jasani; C. H. Wynn Jones; A. Rahmatalla; G. MacKenzie; J. Dove

2007-01-01

49

Removal of Fluoride from Aqueous Solution by CaO Nanoparticles  

Microsoft Academic Search

Colloidal particles of CaO were synthesized by the sol-gel method. The particle morphology was characterized by FT-IR, TGA, DTA, and TEM analysis. The ability of the CaO nanoparticles for removal of fluoride from aqueous solution through adsorption has been investigated. All the experiments were carried out by batch mode. The effect of various parameters viz. contact time, pH effect (pH

Gaurang Patel; Usha Pal; Shobhana Menon

2009-01-01

50

Influence of CaO on damping capacity and mechanical properties of Mg alloy  

Microsoft Academic Search

For developing cost effective damping Mg alloys with high damping capacity and better mechanical properties, the microstructures, the mechanical properties at room temperature and the damping capacity of Mg alloy adding CaO were investigated and compared with those of K1A alloy. CaO adding into pure Mg maintains the damping capacity and increases the ultimate tensile strength compared with those of

Dong-In JANG; Jin-Kyu LEE; Dae-Up KIM; Shae-K KIM

2009-01-01

51

Catalytic reduction of nitric oxide by methane over CaO catalyst  

Microsoft Academic Search

The selective catalytic reduction of nitric oxide by methane was studied over CaO catalyst in a bubbling fluidized bed in\\u000a the temperature range of 800–900 °C, in which NO cannot be reduced by CH4 without CaO catalyst. The nitric oxide conversion was found to depend on oxygen and CH4 feed concentration, and also on temperature. In addition, the presence of

Wei Xu; Huiling Tong; Changhe Chen; Xuchang Xu

2008-01-01

52

Bactericidal effects of CaO (scallop-shell powder) on foodborne pathogenic bacteria.  

PubMed

This study was investigated the bactericidal effects of calcium oxide (CaO) on three common foodborne pathogenic bacteria: Escherichia coli, Listeria monocytogenes, and Salmonella typhimurium. Each bacteria level was determined in a CaO solution (0.01, 0.03, 0.05, 0.10, 0.15, and 0.20% [w/v]) exposed for either 15 sec, 30 sec, 1 min, 2 min, 3 min, 5 min, 10 min, or 30 min. All three bacteria were not greatly affected by CaO solutions at concentrations of 0.01 and 0.03%, however, the decline of E. coli (99%; 2.78 log10 CFU/mL), L. monocytogens (45%; 1.44 log10 CFU/mL), and S. typhimurium (70%; 2.08 log10 CFU/mL) was greatest when they were exposed to 0.05% CaO solution for 10 min. Moreover, the bactericidal action of CaO was maintained for at least 24 h of storage. The results of this study provide evidence that CaO, as a substitute for synthetic chemical substances has potential for use in the disinfection and sanitization of foods and food processing equipment. PMID:16681035

Bae, Dong-Ho; Yeon, Ji-Hye; Park, Shin-Young; Lee, Dong-Ha; Ha, Sang-Do

2006-04-01

53

Thermal analysis of binary mixtures of CaO, CaO 2 , Ca(OH) 2 , and Mg(OH) 2 with sodium and potassium perchlorates  

Microsoft Academic Search

The catalytic activity of magnesium oxide, calcium oxide, and calcium peroxide in reactions of dioxygen evolution from sodium and potassium perchlorates has been studied. Additives of CaO facilitate the complete decomposition of perchlorates within the same temperature range as that found for additives of Mn, Co, Ni, and Cu oxides. Tile data oil the low catalytic activity of calcium oxide

V. V. Klyucharev; M. Sinel'nikov; A. P. Razumova; V. D. Sasnovskaya

1996-01-01

54

Fast on-line multiplication units using LSA organization  

NASA Astrophysics Data System (ADS)

This paper presents the application of the Linear Sequential Array (LSA) retiming approach, developed for conventional digit- recurrence algorithms, to on-line multiplication. The result is a modular and fast pipelined structure which due to a small constant fan-out and cycle time independent of precision is suitable for FPGA implementation. First we present the basics of on-line multiplication, and determine data dependencies according to the LSA design methodology. Based on these dependencies we redesign the traditional on-line multiplier to obtain the LSA structure. Since in DSP applications one of the multiplier operands is fixed for a long sequence of operations, we briefly present a parallel-serial multiplication unit that receives one of the operands in parallel and the other operand in Most-Significant-Digit-First format. Performance and area results are provided for the LSA on-line multiplier design and then compared with the conventional on-line design, using Xilinx FPGAs as the target technology.

Tenca, Alexandre F.; Ercegovac, Milos D.; Louie, Marianne E.

1999-11-01

55

On-Line Assessment: What, Why, How.  

ERIC Educational Resources Information Center

Recent increases in the speed and accessibility of computers and networks have made it possible to administer tests on-line. On-line assessment can be conducted in a controlled setting, such as a testing center, or distributed over local area networks or the Internet to libraries and student homes, allowing students the flexibility to complete…

Natal, Dottie

56

Optical on line techniques for nuclear applications  

SciTech Connect

Optical on line techniques enable non intrusive physical measurements in harsh environments (high temperature, high pressure, radioactivity, ...). Optical absorption spectrometries such as UV-Visible, FTIR, CRDS have been successfully used to study gas phase speciation in different nuclear applications. LIBS which relies on laser matter interactions is a on line optical technique for solids and liquids elementary analysis. (authors)

Doizi, D. [CEA, Nuclear Energy Div. DEN, DANS/DPC/SECR/LSRM (France); Pailloux, A.; Maury, C.; Sirven, J. B.; Dauvois, V.; Roujou, J. L.; Rosset, C. D. [CEA, Nuclear Energy Div. DEN, DANS/DPC (France); Hartmann, J. M. [CNRS., UMR 7583, LISA, Creteil (France)

2011-07-01

57

[Textual research on the editions of Ben cao fa ming (Invention of Materia Medica)].  

PubMed

The edition of Ben cao fa ming (Invention of Materia Medica) included in Zhong guo ben cao quan shu (The Complete Collection of Traditional Texts on Chinese Materia Medica) is photoprinted from the Ming-dynasty block-printed edition persevered in the Library of China Academy of Chinese Medical Sciences (CACMS), an incomplete one with some parts missing. In addition, there are the Ming-dynasty block-printed edition preserved in the Shanghai Library and Japanese hand-copied edition, both complete ones with full texts. In fact, the Shanghai edition and CACMS edition are the same one, only the text of "the differential classification of ben cao of the Ming Dynasty" are located in different position between them. The Japanese one is hand-copied from the Ming-dynasty block-printed edition. PMID:24135479

Li, Yu-Qing

2013-03-01

58

Dissolution process for ZrO.sub.2 -UO.sub.2 -CaO fuels  

DOEpatents

The present invention provides an improved dissolution process for ZrO.sub.2 -UO.sub.2 -CaO-type pressurized water reactor fuels. The zirconium cladding is dissolved with hydrofluoric acid, immersing the ZrO.sub.2 -UO.sub.2 -CaO fuel wafers in the resulting zirconium-dissolver-product in the dissolver vessel, and nitric acid is added to the dissolver vessel to facilitate dissolution of the uranium from the ZrO.sub.2 -UO.sub.2 -CaO fuel wafers.

Paige, Bernice E. (Idaho Falls, ID)

1976-06-22

59

Correlation effects in MgO and CaO: Cohesive energies and lattice constants  

SciTech Connect

A recently proposed computational scheme based on local increments has been applied to the calculation of correlation contributions to the cohesive energy of the CaO crystal. Using {ital ab} {ital initio} quantum-chemical methods for evaluating individual increments, we obtain {approximately}80{percent} of the difference between the experimental and Hartree-Fock cohesive energies. Lattice constants corrected for correlation effects deviate by less than 1{percent} from experimental values, in the case of MgO and CaO. {copyright} {ital 1996 The American Physical Society.}

Doll, K.; Dolg, M. [Max-Planck-Institut fuer Physik Komplexer Systeme, D-01187 Dresden (Germany); Stoll, H. [Institut fuer Theoretische Chemie, Universitaet Stuttgart, D-70550 Stuttgart (Germany)

1996-11-01

60

Bactericidal effects of CaO (scallop-shell powder) on foodborne pathogenic bacteria  

Microsoft Academic Search

This study was investigated the bactericidal effects of calcium oxide (CaO) on three common foodborne pathogenic bacteria:Escherichia coli, Listeria monocytogenes, andSalmonella typhimurium. Each bacteria level was determined in a CaO solution (0.01, 0.03, 0.05, 0.10, 0.15, and 0.20% [w\\/v]) exposed for either\\u000a 15 sec, 30 sec, 1 min, 2 min, 3 min, 5 min, 10 min, or 30 min. All

Dong-Ho Bae; Ji-Hye Yeon; Shin-Young Park; Dong-Ha Lee; Sang-Do Ha

2006-01-01

61

On-line chemical composition analyzer development  

SciTech Connect

This report relates to the development of an on-line Raman analyzer for control of a distillation column. It is divided into: program issues, experimental control system evaluation, energy savings analysis, and reliability analysis. (DLC)

Garrison, A.A.

1993-01-01

62

Motion estimation using on-line arithmetic  

Microsoft Academic Search

This paper proposes a class of motion estimation operation technologies and MSD-first comparators, which are implemented using on-line arithmetic. In on-line arithmetic, the numbers are represented in the redundant binary representation, where carry\\/borrow propagation chains are eliminated. This is because most significant digit (MSD) first accumulates and subtraction algorithms are applied by signed-digit (SD) representations. Most of previous MSD-first researches

Ching-Long Su; Chein-Wei Jen

2000-01-01

63

METHOD FOR VARIATION OF GRAIN SIZE IN STUDIES OF GAS-SOLID REACTIONS INVOLVING CAO  

EPA Science Inventory

The paper describes a method for varying grain size in studies of gas-solid reactions involving CaO. (Note: Introducing grain size as an independent experimental variable should contribute to improved understanding of reactions in porous solids.) Calcining 1 micrometer CaCO3 part...

64

Performance of the first-light adaptive optics system of LBT by means of CAOS simulations  

Microsoft Academic Search

This presentation reports the numerical simulations we have done in order to evaluate the performance of the first-light AO system of LBT. The simulation tool used for this purpose is the Software Package CAOS, applicable for a wide range of AO systems and for which a brief recall of the main features is made. The whole process of atmospheric propagation

Marcel Carbillet; Christophe Vérinaud; Simone Esposito; Armando Riccardi; Alfio Puglisi; Bruno Femenía; Luca Fini

2003-01-01

65

Effect of specific surface area on the reactivity of CaO with SOâ  

Microsoft Academic Search

The rate of reaction of calcined limestone with SOâ and Oâ was measured at conditions that eliminate all resistances not associated with the CaO grain surface. Reactivity increased with the square of the BET surface area when grain size was varied as an experimental parameter. The observed effects of surface area and temperature account for the SOâ capture reported for

R. H. Borgwardt; K. R. Bruce

1986-01-01

66

Highly basic CaO nanoparticles in mesoporous carbon materials and their excellent catalytic activity.  

PubMed

Highly basic CaO nanoparticles immobilized mesoporous carbon materials (CaO-CMK-3) with different pore diameters have been successfully prepared by using wet-impregnation method. The prepared materials were subjected to extensive characterization studies using sophisticated techniques such as XRD, nitrogen adsorption, HRSEM-EDX, HRTEM and temperature programmed desorption of CO2 (TPD of CO2). The physico-chemical characterization results revealed that these materials possess highly dispersed CaO nanoparticles, excellent nanopores with well-ordered structure, high specific surface area, large specific pore volume, pore diameter and very high basicity. We have also demonstrated that the basicity of the CaO-CMK-3 samples can be controlled by simply varying the amount of CaO loading and pore diameter of the carbon support. The basic catalytic performance of the samples was investigated in the base-catalyzed transesterification of ethylacetoacetate by aryl, aliphatic and cyclic primary alcohols. CMK-3 catalyst with higher CaO loading and larger pore diameter was found to be highly active with higher conversion within a very short reaction time. The activity of 30% CaO-CMK3-150 catalyst for transesterification of ethylacetoacetate using different alcohols increases in the following order: octanol > butanol > cyclohexanol > benzyl alcohol > furfuryl alcohol. PMID:22905508

Raja, Pradeep Kumar; Chokkalingam, Anand; Priya, Subramaniam V; Balasubramanian, Veerappan V; Benziger, Mercy R; Aldeyab, Salem S; Jayavell, Ramasamy; Ariga, Katsukiho; Vinu, Ajayan

2012-06-01

67

Investigation of Product-Layer Diffusivity for CaO Sulfation.  

National Technical Information Service (NTIS)

The paper gives results of comparisons of the sulfation rates of CaO prepared from Ca(OH)2 and CaCO3, using six types of each precursor derived from the same natural limestones. The particles were small enough to eliminate all transport resistances except...

R. H. Borgwardt K. R. Bruce J. Blake

1987-01-01

68

Effect of Specific Surface Area on the Reactivity of CaO with SO2.  

National Technical Information Service (NTIS)

The paper discusses results of measuring the rate of reaction of calcined limestone (CaCO3) with sulfur dioxide (SO2) and oxygen (O2) at conditions that eliminate all resistances not associated with the lime (CaO) grain surface. Reactivity increased with ...

R. H. Borgwardt K. R. Bruce

1986-01-01

69

Critical Notice: Tian Yu Cao's “The Conceptual Development of 20th Century Field Theories”  

Microsoft Academic Search

Tian Yu Cao has written a serious and scholarly book covering a great deal of physics. He ranges from classical relativity theory, both special and general, to relativistic quantum …eld theory, including non-Abelian gauge theory, renor- malization theory, and symmetry-breaking, presenting a detailed and very rich picture of the mainstream developments in quantum physics; a remarkable feat. It has, moreover,

Simon Saunders

2003-01-01

70

Postcombustion Capture of CO2 with CaO in a Circulating Fluidized Bed Carbonator  

NASA Astrophysics Data System (ADS)

There is an emerging postcombustion capture technology that uses CaO to capture CO2 from combustion flue gases in a circulating fluidized bed reactor. This paper summarizes recent work conducted at CSIC to understand and develop this technology. The paper includes experimental results at conditions close to those expected in the real system, carried out in continuous mode in a 30kW test facility made up of two interconnected circulating fluidized bed reactors. In one of the reactors, CO2 is captured from the gas phase by the CaO continuously circulating from a calciner. In the second reactor, the CaCO3 formed in the carbonator is regenerated to CaO and CO2 by calcination. Modeling of the system at process level, at reactor level (in particular the CFB carbonator), and at particle level (decay in capture capability of CaO) is also outlined. The work carried out so far confirms that the carbonator reactors can be designed to attain capture efficiencies between 70-90%, operating at fluid dynamic conditions close to those present in circulating fluidized bed combustors.

Alonso, M.; Rodriguez, N.; González, B.; Grasa, G.; Murillo, R.; Abanades, J. C.

71

Chemical analysis of the Chinese herbal medicine Gan-Cao (licorice)  

Microsoft Academic Search

Gan-Cao, or licorice, is a popular Chinese herbal medicine derived from the dried roots and rhizomes of Glycyrrhiza uralensis, G. glabra, and G. inflata. The main bioactive constituents of licorice are triterpene saponins and various types of flavonoids. The contents of these compounds may vary in different licorice batches and thus affect the therapeutic effects. In order to ensure its

Qingying Zhang; Min Ye

2009-01-01

72

EFFECT OF SPECIFIC SURFACE AREA ON THE REACTIVITY OF CAO WITH SO2  

EPA Science Inventory

The paper discusses results of measuring the rate of reaction of calcined limestone (CaCO3) with sulfur dioxide (SO2) and oxygen (O2) at conditions that eliminate all resistances not associated with the lime (CaO) grain surface. Reactivity increased with the square of the Brunaue...

73

Materials compatibility during the chlorination of molten CaCl/sub 2/. CaO salts. [CaCl/sub 2/. CaO salt  

SciTech Connect

As part of our effort to develop a semicontinuous PuO/sub 2/ reduction process, we are investigating promising materials for containing a 900/sup 0/C molten CaCl/sub 2/ . CaO chlorination reaction. We want the material to contain this reaction and to be reusable. We tested candidate materials in a simulated salt (no plutonium) using anhydrous HCl as the chlorinating agent. Data are presented on the performance of 36 metals and alloys, 9 ceramics, and 3 coatings.

Rense, C.E.C.; Fife, K.W.; Bowersox, D.F.; Ferran, M.D.

1987-01-01

74

Condenser on-line leak-detection system development  

SciTech Connect

Condenser tube leaks have been the number one source of impurities in most utility steam cycles. The impurities lead to corrosion of feedwater systems, boilers, and turbines. EPRI recommends sodium in the condensate be less than 3 ppb, which means less than one gallon leakage per day in some cases. The location of leaks requires isolation of the condenser water box and is costly because of power reduction. On-line detection using tracer can cut down the isolation time and, therefore, offers cost advantages to utilities. The on-line leak detection technique utilizes the concepts developed by EPRI for targeted chlorination''. Sulfur hexafluoride (SF{sub 6}), helium gases, and perfluorocarbon liquid were considered as tracers. Laboratory studies were conducted to evaluate the practicability of injecting water with dissolved SF{sub 6} gas, SF{sub 6} bubbles, and dissolved SF{sub 6} gas in perfluorocarbon liquid. Both static and dynamic tests were conducted in a condenser model. It was determined that water entrained with SF{sub 6} bubbles offered the most practical method of injection, followed by dissolved SF{sub 6} gas in perfluorocarbon. A conceptual design was developed that utilizes a water lance, a swivel arrangement in the waterbox manhole cover, a tracer targeting and mixing system, and a tracer gas detection system at the air ejector exhaust. A successful demonstration of targeted leak detection using a waterjet lance with SF{sub 6} was conducted at Carolina Power Light Company's Asheville Steam Electric Station Unit 1. A measurable artificially created leak was detected and located using this system with the condenser on-line. 2 refs., 39 figs., 6 tabs.

Not Available

1991-11-01

75

On-line distortion analysis system inlet-engine test  

SciTech Connect

A system for near-real-time distortion analysis support of aircraft turbine engine-inlet altitude testing is described. Target applications include both subscale and full-scale inlet-engine compatibility testing in wind tunnel, direct-connect, and free-jet configurations. The system digitizes analog-format, time-dependent data and combines it with digital-format, steady-state data. A high-speed data bus and multiple array processors provide for on-line execution of complex distortion analysis algorithms to compute and display distortion indices, histograms, isobar plots, and surge margin consumption. Analysis algorithms are programmed using a high-level language (FORTRAN 77).

Morton, W.K.; Lazalier, G.R.; Rose, C.D.; Lauer, R.F.

1991-06-01

76

On line chemical composition of analyzer development  

SciTech Connect

This status report details progress made on the development of an on-line chemical analyzer. Dynamic studies of the distillation column, approval of testing plans, installation of a sample cell and raman analyzer, design of computerized control systems are described. Information on seminars and published papers is also included. (GHH)

Not Available

1992-01-01

77

Authority Issues in On-Line Instruction.  

ERIC Educational Resources Information Center

|An informal study examined the sources of professors' authority and whether the authority dynamic between professor and student changes in an electronic setting. Five on-line writing instructors (who use Internet Email or the World Wide Web) completed a questionnaire. Results indicated that (1) professors tended, at least initially, to replicate…

Podis, JoAnne M.

78

On line mechanical cleaning of heat exchangers  

Microsoft Academic Search

Discusses experiences with on line, continuous, mechanical cleaning of heat exchangers in a cat cracker and comparisons with other cleaning methods. Heat exchangers, including surface condensers, can be severely affected by waterside fouling and the insulating effect of the laminar layer of stagnant water next to the tube wall. Waterside fouling, which includes mineral scale, biofouling, silt and corrosion products,

A. F. Stegelman; R. Renfftlen

1983-01-01

79

On-line learning: a student viewpoint  

Microsoft Academic Search

During the second semester of 2001, one hundred and seven undergraduate and postgraduate students enrolled in Information and Communication Technology (ICT) degree programs at three different institutions located in New South Wales and Victoria, Australia and in Singapore participated in an on-line course. The course was designed with two objectives. The principal objective was to gain an understanding of the

Michael Lawrence-Slater

2002-01-01

80

On-line bagging Negative Correlation Learning  

Microsoft Academic Search

Negative Correlation Learning (NCL) has been showing to outperform other ensemble learning approaches in off-line mode. A key point to the success of NCL is that the learning of an ensemble member is influenced by the learning of the others, directly encouraging diversity. However, when applied to on-line learning, NCL presents the problem that part of the diversity has to

Fernanda L. Minku; Xin Yao

2008-01-01

81

Students On-Line Atmospheric Research  

Microsoft Academic Search

Students On-Line Atmospheric Research (SOLAR) is one of NASA's educational outreach programs. SOLAR's primary role is to support educational outreach activities for NASA's Stratospheric Aerosol and Gas Experiment III (SAGE III). SAGE III is the latest version of a series of solar occultation experiments, which include SAGE I and SAGE II. The SAGE III instrument was launched on a Russian

D. C. Woods; S. W. Moore; S. C. Walters

2002-01-01

82

A Secure On-line Submission System  

Microsoft Academic Search

As student numbers on Computer Science courses continue to increase, the correspondingdemands placed on teaching staff in terms of assessment grow ever stronger. In particular thesubmission and assessment of practical work on large programming courses can present verysignificant problems. In response to this, we have developed a networked suite of software utilitiesthat allow on-line submission, testing and marking of coursework.

Michael Luck; Mike Joy

1999-01-01

83

Use of low CaO unprocessed steel slag in concrete as fine aggregate  

Microsoft Academic Search

Steel slag, which is produced locally in great amounts, has a negative impact on the environment when disposed. Local steel slag has a low CaO content and has no pozzolanic activity.In this research, local unprocessed steel slag is introduced in concrete mixes. Various mixes with compressive strength ranging from 25 to 45MPa are studied. The slag is used as fine

Hisham Qasrawi; Faisal Shalabi; Ibrahim Asi

2009-01-01

84

Sintering of calcium oxide (CaO) during CO2 chemisorption: a reactive molecular dynamics study.  

PubMed

Reactive dynamics simulations with the reactive force field (ReaxFF) were performed in NVE ensembles to study the sintering of two solid calcium oxide (CaO) particles with and without CO(2) chemisorption. The simulated sintering conditions included starting adsorption temperatures at 1000 K and 1500 K and particle separation distances of 0.3 and 0.5 nm. The results revealed that the expansion of sorbent particles during CO(2) chemisorption was attributed to the sintering of two CaO-CaO particles. Increasing the adsorption temperature resulted in more particle expansion and sintering. The shorter the distance between two particles, the faster the rate of sintering during CO(2) adsorption. A detailed analysis on atom spatial variations revealed that the sorbent particles with a larger separation distance had a larger CO(2) uptake because of less sintering incurred. The chemisorptions of CO(2) on CaO particles sintered at high adsorption temperatures were also simulated to mimic the process of sorbent regeneration. It was found that regeneration would be more difficult for sintered particles than for fresh particles. In addition, a possible sintering barrier, magnesium oxide (MgO), was introduced to prevent CaO particles from sintering during CO(2) chemisorption. It was found that the MgO particles could reduce the sintering of CaO particles during CO(2) chemisorption. Simulation results from this study provided some guidelines on synthesizing or selecting sorbents with less sintering effect for multiple CO(2) adsorption-regeneration cycles. PMID:22990764

Zhang, Luzheng; Lu, Yongqi; Rostam-Abadi, Massoud

2012-09-18

85

Amorphous CaO · Al 2O 3 fibers by melt extraction  

Microsoft Academic Search

A novel melt extraction technique has been used to produce fine calcium aluminate (CaO · Al2O3) fibers with wheel velocities of 1.5–65 m s?1. The geometry of the fibers depends on the wheel velocity; at speeds < 3 m s?1 uniform diameter fibers were obtained, whereas at higher velocities Rayleigh waves formed on the fibers owing to instability and the

M. Allahverdi; R. A. L. Drew; P. Rudkowska; G. Rudkowski; J. O. Strom-Olsen

1996-01-01

86

Corundum, Rutile, Periclase, and CaO in Ca, Al-Rich Inclusion from Carbonaceous Chondrites  

Microsoft Academic Search

Four calcium, aluminum-rich inclusions from four carbonaceous chondrites-Allende, Acfer 082, Acfer 086, and Acfer 094-were studied by transmission electron microscopy. All inclusions contained at least two of the oxides periclase (MgO), rutile (TiO_2), calcium oxide (CaO), and corundum (Al_2O_3). The oxides (50 to 200 nanometers in size) were found inside and at grain boundaries of the constituent minerals of the

A. Greshake; A. Bischoff; A. Putnis; H. Palme

1996-01-01

87

Full potential photoemission theory: application to MgO and CaO  

Microsoft Academic Search

The full potential photoemission theory is applied for the first time to the alkaline-earth oxides MgO and CaO. This theory is a straightforward generalization of the one-step model of photoemission for the case of anisotropic, space-filling potentials and several atoms per unit cell. It allows the calculation of angle-resolved ultraviolet photoemission (ARUPS) and bremsstrahlung isochromat spectra (ARBIS) from compounds. The

M. Grass; J. Braun; G. Borstel

1995-01-01

88

Production of hydrogen from bio-oil using CaO as a CO 2 sorbent  

Microsoft Academic Search

Steam reforming of bio-oil into transportation-fuel-grade hydrogen using CaO as a CO2 sorbent is modelled using the ASPEN PLUS process simulator. The simulations predict that (1) operating the absorbing (reforming) reactor at 600–850°C and the desorbing (regeneration) reactor at ?800°C and near ambient pressure is optimal; (2) the gas exiting the absorbing reactor contains >95%H2 (dry gas, molar basis) versus

C. M. Kinoshita; S. Q. Turn

2003-01-01

89

Porous carbon material containing CaO for acidic gas capture: Preparation and properties.  

PubMed

A one-step process for the preparation of CaO-containing porous carbons is described. Mixtures of poly(ethylene terephthalate) with natural limestone were pyrolyzed and thus hybrid sorbents could be easily obtained. The polymeric material and the mineral served as a carbon precursor and CaO delivering agent, respectively. We discuss effects of the preparation conditions and the relative amounts of the raw materials used for the preparations on the porosity of the hybrid products. The micropore areas and volumes of the obtained products tended to decrease with increasing CaO contents. Increase in the preparation temperature entailed a decrease in the micropore volume, whereas the mesopore volume increased. The pore creation mechanism is proposed on the basis of thermogravimetric and temperature-programmed desorption measurements. The prepared CaO-containing porous carbons efficiently captured SO2 and CO2 from air. Washing out of CaO from the hybrid materials was confirmed as a suitable method to obtain highly porous carbon materials. PMID:23743266

Przepiórski, Jacek; Czy?ewski, Adam; Pietrzak, Robert; Toyoda, Masahiro; Morawski, Antoni W

2013-04-30

90

Targeting metabolomics analysis of the sunscreen agent 2-ethylhexyl 4-(N,N-dimethylamino)benzoate in human urine by automated on-line solid-phase extraction-liquid chromatography-tandem mass spectrometry with liquid chromatography-time-of-flight/mass spectrometry confirmation.  

PubMed

The in vivo metabolism of the xenobiotic agent 2-ethylhexyl 4-(N,N-dimethylamino)benzoate (EDP), a UV filter commonly used in sunscreen cosmetic products, was studied by targeting metabolomics analysis in human urine. The metabolomic study involved the use of urine from male and female volunteers before and after application of an EDP-containing sunscreen cosmetic. The metabolism of EDP in urine was studied by using the triple quadrupole detector in a combination of Precursor Ion Scanning and Neutral Loss Scanning modes, with and without enzymatic hydrolysis. Detected metabolites were subsequently confirmed as glucuronide conjugates of 4-(N,N-dimethylamino)benzoic acid and 4-(N-methylamino)benzoic acid by liquid chromatography-time-of-flight/mass spectrometry (LC-TOF/MS) in the accurate mass mode. In this way, the existence of phase II metabolism in the detoxification of EDP by effects of the lipophilic character of this sunscreen agent was confirmed. Hence, to study the in vivo metabolism of EDP, a fully automated method using a solid-phase extraction (SPE) workstation connected on-line to a liquid chromatograph and a triple quadrupole mass analyzer (LC-MS/MS) was developed. The ensuing hyphenated method is very simple and requires minimal human intervention. Following thorough optimization of the SPE and LC-MS/MS conditions, the analytical procedure was validated and standard addition calibration used for the quantitative correction of matrix effects. The proposed method was applied to determine the phase I metabolites of EDP in urine samples and afforded limits of detection from 0.1 to 1.1 ng and accuracy of 91-107% with relative standard deviations in the range 1.5-8.7% (sample volume: 100 ?L). Based on the results of in vivo percutaneous absorption of a single application of the sunscreen, about 0.5% of the amount of the applied EDP is excreted in urine. PMID:21481400

León-González, Zacarías; Ferreiro-Vera, Carlos; Priego-Capote, Feliciano; de Castro, María Dolores Luque

2011-03-26

91

Regulatory challenges of on-line hemodiafiltration.  

PubMed

The launch of on-line hemodiafiltration happened at a very peculiar time from the regulatory standpoint. The directives on medical devices were at their very beginning and the medicinal products regulatory regime was considering, after 30 years of operation of Directive 65/65/EEC, whether it was the case to go for greater harmonization. The success in the introduction of the therapy was strictly linked to the possibility of having the entire system approved for the European market according a single procedure. I had the pleasure to be part of the team, which included Dr. Wolfgang Kümmerle and my old friend Dr. Emanuele Gatti, which succeeded in gathering consensus on the classification of the on-line hemodiafiltration system as a medical device. PMID:22188689

Pirovano, D

2011-12-15

92

Micro-narratives in Contemporary Chinese Art: A Case Study of Cao Fei's Pearl River Delta Anti-heroes  

Microsoft Academic Search

This paper investigates the representation of micro-narratives in contemporary Chinese art by examining the multi-layered narratives in Cao Fei's Pearl River Delta Anti-heroes performed at the opening of the 2 Guangzhou Triennial in 2005. I consider Cao's work as a hyper-realistic portrayal of the micro-narratives of the Pearl River Delta region in a mediated form highly influenced by the media,

Silvia Fok

2011-01-01

93

Enhancing Understanding Through On-line Discussions  

Microsoft Academic Search

The use of the computer and other technologies (i.e. the internet, world-wide web, etc.) are currently being aggressively used by many educators as tools in the learning process. This paper will report on an on-going research study at American University designed to address the role of student understanding in physics using an on-line discussion group format. In terms of gauging

Teresa Larkin-Hein

2001-01-01

94

Software for interactive on-line conferences  

Microsoft Academic Search

A layered architecture for the implementation of real-time conferences is presented. In a real-time conference a group of users each at his or her own workstation, share identical views of on-line application information. The users cooperate in a problem solving task by interactively modifying or editing the shared view or the underlying information, and can use a voice communication channel

Sunil K. Sarin; Irene Greif

1984-01-01

95

Novel On-Line Sedimentation Analyzer  

Microsoft Academic Search

The design and development of a novel vibrating reed technique for on-line measurement of the sedimentation kinetics of two-phase dispersions is described. The feasibility of operation of the analyzer has been successfully verified in conjunction with a variety of model and industrially relevant systems. The former include mono- and polydisperse glass ballotini\\/water mixtures with solids particle sizes and concentration ranges

Haroun Mahgerefteh; Dick Kamugasha

2000-01-01

96

On-line monitoring of incinerator emissions  

Microsoft Academic Search

As part of efforts to develop an on-line emissions monitor to detect specific organic compounds for incinerators, the authors tested a Fourier transform infrared spectrometer (FTIR) coupled with a long-path cell (LPC). A mixture of toluene, chlorobenzene, 1,1,1-trichloroethane, and trichloroethylene with elemental ratio C:H:Cl = 3:3.1:0.9 was incinerated in a methane\\/air flame. The effluent was continuously passed through a heated

Zhuoxiong Mao; J. C. Demirgian; E. Hwang

1993-01-01

97

A Distributed System for Learning Programming On-Line  

ERIC Educational Resources Information Center

|Several Web-based on-line judges or on-line programming trainers have been developed in order to allow students to train their programming skills. However, their pedagogical functionalities in the learning of programming have not been clearly defined. EduJudge is a project which aims to integrate the "UVA On-line Judge", an existing on-line

Verdu, Elena; Regueras, Luisa M.; Verdu, Maria J.; Leal, Jose P.; de Castro, Juan P.; Queiros, Ricardo

2012-01-01

98

Evolutionary changes in chlorophyllide a oxygenase (CAO) structure contribute to the acquisition of a new light-harvesting complex in micromonas.  

PubMed

Chlorophyll b is found in photosynthetic prokaryotes and primary and secondary endosymbionts, although their light-harvesting systems are quite different. Chlorophyll b is synthesized from chlorophyll a by chlorophyllide a oxygenase (CAO), which is a Rieske-mononuclear iron oxygenase. Comparison of the amino acid sequences of CAO among photosynthetic organisms elucidated changes in the domain structures of CAO during evolution. However, the evolutionary relationship between the light-harvesting system and the domain structure of CAO remains unclear. To elucidate this relationship, we investigated the CAO structure and the pigment composition of chlorophyll-protein complexes in the prasinophyte Micromonas. The Micromonas CAO is composed of two genes, MpCAO1 and MpCAO2, that possess Rieske and mononuclear iron-binding motifs, respectively. Only when both genes were introduced into the chlorophyll b-less Arabidopsis mutant (ch1-1) was chlorophyll b accumulated, indicating that cooperation between the two subunits is required to synthesize chlorophyll b. Although Micromonas has a characteristic light-harvesting system in which chlorophyll b is incorporated into the core antennas of reaction centers, chlorophyll b was also incorporated into the core antennas of reaction centers of the Arabidopsis transformants that contained the two Micromonas CAO proteins. Based on these results, we discuss the evolutionary relationship between the structures of CAO and light-harvesting systems. PMID:23677999

Kunugi, Motoshi; Takabayashi, Atsushi; Tanaka, Ayumi

2013-05-15

99

Action Research and Evaluation On Line  

NSDL National Science Digital Library

Action research consists of a family of research methodologies which pursue action and research outcomes at the same time. Areol, action research and evaluation on line, is a 14-week public course offered each semester as a public service by Southern Cross University and the Southern Cross Institute of Action Research. There are four orientation sessions. The first will give students some idea of the commitment in time that it may take to engage properly in the program. The second overviews the program. The third discusses the setting up of learning groups as an associated activity.

100

GOLDÂ Genomes OnLine Database  

NSDL National Science Digital Library

Free for academic and non-commercial use, the Genomes OnLine Database (GOLD) is an internet "resource for comprehensive access to information regarding complete and ongoing genome projects around the world. GOLD provides the largest available and most detailed monitoring of genome sequencing projects." This recently updated database presently contains 173 Published Complete Genomes (including 4 chromosomes, 445 Prokaryotic Ongoing Genomes, and 384 Eukaryotic Ongoing Genomes (including 8 chromosomes). The GOLD search engine allows users to search by Domain, Status, Institution, Phylogeny, and more. This site also contains GOLD-specific Links, related Other Links, and links to References, Statistics, and GOLD News.

101

On-line valve monitoring and diagnosis  

SciTech Connect

The valve monitor system is described. It can monitor a large number of valves on-line with a minimum of cabling to be installed. It can also be used to diagnose individual valves off-line with temporary cabling and nonintrusive sensors. Trend analysis can be performed when historic data and baseline records are available. The sensor data and the diagnostic capabilities allow plant personnel to assess the remaining safe life of a valve much more accurately than is possible without sensors. This, in turn, allows the utilities to justify maintenance schedules based on need rather than calendar time.

Schreurs, J. (Westinghouse Science and Technology Center, Pittsburgh, PA (US)); Bednar, F. (Westinghouse NATD, Monroeville, PA (US))

1990-01-01

102

Dairy Herd On-line Information System  

NASA Astrophysics Data System (ADS)

As the business circumstances have become worse, computational breeding management based on the scientific matters has been needed for dairy farming in our country. In this connection it was urgent to construct the system which provided data effectively used in the fields for dairy farmers. The Federation has executed to provide dairy farming technical data promptly through its own on-line network being composed of middle sized general-purpose computer (main memory : 5MB, and fixed disk : 1100MB) and 22 terminals.

Takahashi, Satoshi

103

Structure refinement of CaO.6Al2O3  

Microsoft Academic Search

The crystal structure of CaO.6Al2O3 at 294 K was investigated by X-ray diffraction and refined to an R value of 0.025 for 2735 reflections (1492 independent reflections). It belongs to the space group P63\\/mmc with a = 5.5587(1), c = 21.8929(3) Å, V = 585.83(1)Å3, and Z = 2, Dx = 3.79 g\\/cm3, and mu(MoKalpha) = 15.86 cm-1. Three different

A. Utsunomiya; K. Tanaka; H. Morikawa; F. Marumo; H. Kojima

1988-01-01

104

Pressure-induced amorphization in mayenite (12CaO.7Al2O3)  

NASA Astrophysics Data System (ADS)

We report a joint experimental and theoretical study on high pressure structures of nanoporous mayenite (12CaO.7Al2O3). A pressure-induced amorphization was identified at ~13 GPa by in situ high pressure x-ray experiments. The amorphous product can be decompressed to ambient conditions. Ab initio calculations reveal that the anisotropic deformations of empty cages break the crystallographic long-range orders, leading to the formation of high-pressure amorphous state. Furthermore, the deformation routes of empty cages are found fully dependent on their individual locally structural geometry relevant to the distribution of extra-framework oxygen ions.

Zhang, Xinxin; Wang, Yanchao; Wang, Hui; Cui, Qiliang; Wang, Chengxin; Ma, Yanming; Zou, Guangtian

2011-09-01

105

Exciton-driven highly hyperthermal O-atom desorption from nanostructured CaO  

SciTech Connect

We report qualitatively new highly-hyperthermal (HHT) oxygen atom emission from nanostructured CaO excited by 6.4 eV nanosecond laser pulses. The kinetic energy distribution of emitted O-atoms peaks at 0.7 eV, which is over four times greater than previously observed. Excitation of MgO and CaO nanostructures with UV laser pulses is known to result in thermal and hyperthermal emission of oxygen atoms when photons with energies below and above the band gap, respectively, are used. The highly energetic atomic desorption we observe, following bulk excitation, challenges the conventional view that bulk excitation can only induce thermal desorption. Using density functional theory and an embedded cluster method, we propose a mechanism for this HHT feature based on the interaction of surface holes with bulk excitons. These experimental and theoretical results suggest that specific atomic desorption mechanisms in wide-bandgap materials can be controlled by selective electronic excitation of not only the surface but also the bulk of these materials

Sushko, Petr V.; Shluger, Alexander L.; Joly, Alan G.; Beck, Kenneth M.; Hess, Wayne P.

2011-01-27

106

On-line tritium production monitor  

DOEpatents

A scintillation optical fiber system for the on-line monitoring of nuclear reactions in an event-by-event manner is described. In the measurement of tritium production one or more optical fibers are coated with enriched .sup.6 Li and connected to standard scintillation counter circuitry. A neutron generated .sup.6 Li(n )T reaction occurs in the coated surface of .sup.6 Li-coated fiber to produce energetic alpha and triton particles one of which enters the optical fiber and scintillates light through the fiber to the counting circuit. The coated optical fibers can be provided with position sensitivity by placing a mirror at the free end of the fibers or by using pulse counting circuits at both ends of the fibers.

Mihalczo, John T. (Oak Ridge, TN)

1993-01-01

107

On-line tritium production monitor  

DOEpatents

A scintillation optical fiber system for the on-line monitoring of nuclear reactions in an event-by-event manner is described. In the measurement of tritium production one or more optical fibers are coated with enriched {sup 6}Li and connected to standard scintillation counter circuitry. A neutron generated {sup 6}Li(n)T reaction occurs in the coated surface of {sup 6}Li-coated fiber to produce energetic alpha and triton particles one of which enters the optical fiber and scintillates light through the fiber to the counting circuit. The coated optical fibers can be provided with position sensitivity by placing a mirror at the free end of the fibers or by using pulse counting circuits at both ends of the fibers. 5 figures.

Mihalczo, J.T.

1993-11-23

108

University of British Columbia: Fish On Line  

NSDL National Science Digital Library

Hosted by the University of British Columbia, this website contains Fish On Line, a draft guide for teaching and learning about ichthyology. The "guide provides a structure and case study material for a computer-based course in ichthyology for upper undergraduates and graduate students in biology or environmental science. The key resource made accessible through this guide is FishBase, a large database on the biology of fish, available on CD-ROM (for Windows operating system) and on the Internet (www.fishbase.org/search.cfm)." The site provides brief introductory sections to the field of ichthyology and to FishBase, as well as chapters on Evolution, Morphology, Reproduction, and more. The site also offers supplementary exercises accompanying each chapter, and an extensive list of related links.

2008-01-29

109

Novel On-Line Sedimentation Analyzer.  

PubMed

The design and development of a novel vibrating reed technique for on-line measurement of the sedimentation kinetics of two-phase dispersions is described. The feasibility of operation of the analyzer has been successfully verified in conjunction with a variety of model and industrially relevant systems. The former include mono- and polydisperse glass ballotini/water mixtures with solids particle sizes and concentration ranges of 55-200 µm and 1.75-2.81% (v/v), respectively. Measured settling velocities are in good accord with those obtained from direct visual observation of suspension-clear liquid interfaces. The industrially relevant systems include agglomerated kaolin/water suspensions with solids concentrations as high as 20% (v/v) and oil/water emulsions with light phase concentrations in the range 30-50% (v/v). Copyright 2000 Academic Press. PMID:10926482

Mahgerefteh; Kamugasha

2000-08-15

110

On-line process control monitoring system  

DOEpatents

An on-line, fiber-optic based apparatus for monitoring the concentration of a chemical substance at a plurality of locations in a chemical processing system comprises a plurality of probes, each of which is at a different location in the system, a light source, optic fibers for carrying light to and from the probes, a multiplexer for switching light from the source from one probe to the next in series, a diode array spectrophotometer for producing a spectrum from the light received from the probes, and a computer programmed to analyze the spectra so produced. The probes allow the light to pass through the chemical substance so that a portion of the light is absorbed before being returned to the multiplexer. A standard and a reference cell are included for data validation and error checking.

O`Rourke, P.E.; Van Hare, D.R.; Prather, W.S.

1991-01-22

111

Gated Treatment Delivery Verification With On-Line Megavoltage Fluoroscopy  

SciTech Connect

Purpose: To develop and clinically demonstrate the use of on-line real-time megavoltage (MV) fluoroscopy for gated treatment delivery verification. Methods and Materials: Megavoltage fluoroscopy (MVF) image sequences were acquired using a flat panel equipped for MV cone-beam CT in synchrony with the respiratory signal obtained from the Anzai gating device. The MVF images can be obtained immediately before or during gated treatment delivery. A prototype software tool (named RTReg4D) was developed to register MVF images with phase-sequenced digitally reconstructed radiograph images generated from the treatment planning system based on four-dimensional CT. The image registration can be used to reposition the patient before or during treatment delivery. To demonstrate the reliability and clinical usefulness, the system was first tested using a thoracic phantom and then prospectively in actual patient treatments under an institutional review board-approved protocol. Results: The quality of the MVF images for lung tumors is adequate for image registration with phase-sequenced digitally reconstructed radiographs. The MVF was found to be useful for monitoring inter- and intrafractional variations of tumor positions. With the planning target volume contour displayed on the MVF images, the system can verify whether the moving target stays within the planning target volume margin during gated delivery. Conclusions: The use of MVF images was found to be clinically effective in detecting discrepancies in tumor location before and during respiration-gated treatment delivery. The tools and process developed can be useful for gated treatment delivery verification.

Tai An, E-mail: atai@mcw.ed [Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI (United States); Christensen, James D.; Gore, Elizabeth [Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI (United States); Khamene, Ali [Imaging and Visualization Department, Siemens AG, Princeton, NJ (United States); Boettger, Thomas [Oncology Care Systems, Siemens AG, Heidelberg (Germany); Li, X. Allen [Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI (United States)

2010-04-15

112

On-line chemical composition analyzer development  

SciTech Connect

The energy consumed in distillation processes in the United States represents nearly three percent of the total national energy consumption. If effective control of distillation columns can be accomplished, it has been estimated that it would result in a reduction in the national energy consumption of 0.3%. Real-time control based on mixture composition could achieve these savings. However, the major distillation processes represent diverse applications and at present there does not exist a proven on-line chemical composition sensor technology which can be used to control these diverse processes in real-time. This report presents a summary of the findings of the second phase of a three phase effort undertaken to develop an on-line real-time measurement and control system utilizing Raman spectroscopy. A prototype instrument system has been constructed utilizing a Perkin Elmer 1700 Spectrometer, a diode pumped YAG laser, two three axis positioning systems, a process sample cell land a personal computer. This system has been successfully tested using industrially supplied process samples to establish its performance. Also, continued application development was undertaken during this Phase of the program using both the spontaneous Raman and Surface-enhanced Raman modes of operation. The study was performed for the US Department of Energy, Office of Industrial Technologies, whose mission is to conduct cost-shared R D for new high-risk, high-payoff industrial energy conservation technologies. Although this document contains references to individual manufacturers and their products, the opinions expressed on the products reported do not necessarily reflect the position of the Department of Energy.

Roberts, M.J.; Garrison, A.A.; Muly, E.C.; Moore, C.F.

1992-02-01

113

Economic Analysis of On-Line Music: Choice Between On-Line and Traditional Music Shops  

Microsoft Academic Search

The aim of this paper is to analyze the interaction between on-line and traditional music shops in order to understand the economic changes taking place in the music market. Music has been enjoyed since the emergence of human civilization, but until very recently only live performances could be experienced. The record industry emerged less than 100 years ago, in 1910.

Toshiaki Takita

2006-01-01

114

Conversation Using On-Line Dialogue Translation System.  

National Technical Information Service (NTIS)

The authors have developed an on-line dialog translation system called the automatic translation typing phone (ATTP) by combining the technologies of Japanese-English bidirectional translation and on-line terminal-to-terminal communication through keyboar...

H. Nogami Y. Asahioka S. Amano

1989-01-01

115

An On-Line Look at Automatic Contrast and Correction of Behavior Categorizations and Dispositional Inferences  

Microsoft Academic Search

The current study examined on-line behavior recategorization as a mechanism underlying corrections for contextual influences in dispositional inferences. After watching an initial comparison video that portrayed either a successful or unsuccessful perfor- mance on a spatial ability task, cognitive load and no load par- ticipants watched and made real-time ratings of a target perfor- mance. The comparison video was expected

Stephanie J. Tobin; Gifford Weary

2003-01-01

116

Self-healing of defects in CaO coatings on V-5%Cr-5%Ti in liquid lithium  

SciTech Connect

In-situ electrical resistance of CaO coatings produced on V-5%Cr-5%Ti by exposure of the alloy to liquid Li that contained 0.5-85 wt % dissolved Ca was measured as a function of time at temperatures between 250 and 600{degrees}C. Examination of the specimens after cooling to room temperature revealed no spallation, but homogeneous crazing cracks were present in the CaO coating. Additional tests to investigate the in-situ self-healing behavior of the cracks indicated that rapid healing occurred at >360{degrees}C.

Park, J.H.; Kassner, T.F.

1994-11-01

117

Modelling Requirements and Architecting Large-Scale On-Line Competence Based Learning Systems  

Microsoft Academic Search

This paper presents a summary of the key issues that arose while creating models and an architecture for a large-scale target information processing system (given the pseudonym LASCO). LASCO combines requirements to handle competence, learning content, on-line delivery, and learning management. LASCO is targeted at enterprises with in excess of 1,000, and typically several thousand, employees who need to participate

Geoffrey Darnton

2002-01-01

118

Software System for Measuring Bubble Chamber Films on Line.  

National Technical Information Service (NTIS)

A system has been developed for measuring bubble chamber films on line. This report describes the computer program used in the on-line system. The program guides the operator during the measurements, makes on-line control of the measurement data and produ...

G. Blomqvist P. O . Hulth

1974-01-01

119

Epilogue: A Cautionary Note about On-Line Assessment.  

ERIC Educational Resources Information Center

|Warns that the effectiveness of on-line assessment can be mitigated by several factors: unrealistic appraisal of the potential of on-line education, enforcement of a code of conduct, computer and telecommunication skills bias, and other limitations of on-line media. (EV)|

Bothel, Richard Thomas

2002-01-01

120

On-Line Learning: One Way to Bring People Together  

ERIC Educational Resources Information Center

|The purpose of this study was to demonstrate the benefits of on-line learning for adult learners and to further demystify three common misconceptions concerning on-line learning: students certainly do receive support from their on-line professors, the professor is pro-active rather than passive, and students may be more motivated to learn than…

Goff-Kfouri, Carol Ann

2006-01-01

121

Mediterranean lifestyle: nutritional education on-line.  

PubMed

Our goal is to spread on-line the Italian Weekly Pyramid, a tool designed to convey both portion size and frequency of food intake. The Pyramid is referring to the "Well-being Index" (WI) as a unit for an adequate lifestyle. The user can verify his weekly lifestyle by participating to a "game" based on food/beverages consumption and time assigned to physical activity. The site has been visited by 15920 individuals, of whom 4033 completed the game. Self-selected sample, not representative of the Italian population. The data collected included WI consumption by gender for each food group compared to WI suggested. Statistical data evaluation has been performed with the SPSS inc.13 program, without applying any statistical significance to the results. The sample showed a varied eating pattern; all the food groups were consumed almost daily, albeit in much lower quantities with regards to the suggested WI. Fruit and vegetable consumption was higher in women, while men showed a higher intake of meat and cut meats. The percentage of the participants consuming more WI with respect to the recommended amounts was very low for fruit, vegetable, pasta and bread, while was much higher as regards energy dense food. PMID:20169828

del Balzo, V; Scanu, A; Dernini, S; Palmieri, O; Cannella, C

122

Nature of the solid solutions in the system ZrO/sub 2/-CaO  

SciTech Connect

The results of x-ray spectral microanalysis and x-ray diffraction analysis indicate that the solid solutions in the system ZrO/sub 2/-CaO must be interpreted as solutions of ZrO/sub 2/ in CaZr/sub 4/O/sub 9/. As regards the structure of the solid solutions in this system, they evidently must be described from the standpoint of the model of coordination defects by analogy with the system HfO-CaO, where the phases enriched with hafnium dioxide (from CaHf/sub 4/O/sub 9/ to CaHf/sub 6/O/sub 13/) were studied based on the defective structure of fluorite. In addition, the samples with intermediate compositions can be represented by a set of coherently related, ordered, interpenetrating structures.

Kostikov, Yu.P.; Leonov, A.I.

1986-12-01

123

Performance of the first-light adaptive optics system of LBT by means of CAOS simulations  

NASA Astrophysics Data System (ADS)

This presentation reports the numerical simulations we have done in order to evaluate the performance of the first-light AO system of LBT. The simulation tool used for this purpose is the Software Package CAOS, applicable for a wide range of AO systems and for which a brief recall of the main features is made. The whole process of atmospheric propagation of light, wavefront sensing (using a complete model of the pyramid wavefront sensor), wavefront reconstruction using the LBT672 adaptive secondary mirror modes), and closing of the loop, is simulated. The results are given in terms of obtained Strehl ratios in J-, H-, and K-band. Estimation of the resulting sky-coverage in K-band for different regions of the sky are also expressed. A comparison with the performance that would be obtained by using a Shack-Hartmann sensor is presented, confirming the gain achievable with the pyramid sensor.

Carbillet, Marcel; Vérinaud, Christophe; Esposito, Simone; Riccardi, Armando; Puglisi, Alfio; Femenía, Bruno; Fini, Luca

2003-02-01

124

Microstructure-property relationship for porous CaO stabilized ZrO2 support tubes  

SciTech Connect

The active elements of the Westinghouse solid oxide electrolyte fuel cell are supported on porous CaO stabilized ZrO2 tubes. These support tubes must possess adequate mechanical strength to survive both fabrication activities as well as long term cell operation. At the same time, gas diffusion rates through the porous structure must be high enough so as not to limit cell fabrication and cell operation processes that are dependent upon gas transport. Both mechanical properties and gas diffusion rates are strongly related to tube microstructure. These property-microstructure relationships are described. Using this understanding, porous support tubes with improved properties can be realized through compositional developments and/or processing innovations.

Rossing, B.R.

1983-10-01

125

Fluidized bed combustion systems integrating CO2 capture with CaO.  

PubMed

Capturing CO2 from large-scale power generation combustion systems such as fluidized bed combustors (FBCs) may become important in a CO2-constrained world. Using previous experience in capturing pollutants such as SO2 in these systems, we discuss a range of options that incorporate capture of CO2 with CaO in FBC systems. Natural limestones emerge from this study as suitable high-temperature sorbents for these systems because of their low price and availability. This is despite their limited performance as regenerable sorbents. We have found a range of process options that allow the sorbent utilization to maintain a given level of CO2 separation efficiency, appropriate operating conditions, and sufficiently high power generation efficiencies. A set of reference case examples has been chosen to discuss the critical scientific and technical issues of sorbent performance and reactor design for these novel CO2 capture concepts. PMID:15884387

Abanades, J Carlos; Anthony, Edward J; Wang, Jinsheng; Oakey, John E

2005-04-15

126

On-line Handwritten Japanese Text Recognition free from Constrains on Line Direction and Character Orientation  

Microsoft Academic Search

This paper describes an on-line handwritten Japanese text recognition method that is liberated from constraints on writing direction (line direction) and character orientation. This method estimates the line direction and character orientation using the time sequence information of pen-tip coordinates and employs writing- box-free recognition with context processing combined. The method can cope with a mixture of vertical, horizontal and

Masaki Nakagawa; Motoki Onuma

2003-01-01

127

Students On-Line Atmospheric Research  

NASA Astrophysics Data System (ADS)

Students On-Line Atmospheric Research (SOLAR) is one of NASA's educational outreach programs. SOLAR's primary role is to support educational outreach activities for NASA's Stratospheric Aerosol and Gas Experiment III (SAGE III). SAGE III is the latest version of a series of solar occultation experiments, which include SAGE I and SAGE II. The SAGE III instrument was launched on a Russian METEOR 3M spacecraft in December 2001, and is now monitoring the global distribution of aerosols, ozone, clouds, and other important trace gases in the upper atmosphere. The SAGE measurements are critical to improving the understanding of global climate forcing as well as atmospheric chemical processes in the upper atmosphere. The SAGE experiment addresses interesting science problems related to the Earth's atmosphere. Many exciting science and technology topics from SAGE can be developed and incorporated into K-12 curriculum materials to enhance student interest in science. In addition, technologies employed by the SAGE measurement technique give rise to ideas for science projects that involve student participation. The SOLAR outreach program helps to bring these topics and ideas to the classroom by focusing on helping teachers become familiar with current research in the atmospheric sciences, and helping them integrate SOLAR developed educational materials into their curriculum. SOLAR gives special presentations at national and regional science teacher conferences and conducts an annual summer teacher workshop at the NASA Langley Research Center. Members of the SOLAR team also visit schools give classroom presentations and presentations to special student groups. This poster highlights some of the key features of the SOLAR program and presents descriptions of student projects, teacher workshops, and SOLAR resources.

Woods, D. C.; Moore, S. W.; Walters, S. C.

2002-12-01

128

Large magnetoresistive effect in bulk Bi2212 with small additions of USr2CaO6  

NASA Astrophysics Data System (ADS)

A large magnetoresistive (MR) effect was observed in Bi2212 in which USr2CaO6 was added in a proportion of 6 wt%. The resistivity of melt-textured (MT) Bi2212 + 6 wt% USr2CaO6 possess a high sensitivity to applied dc fields, as compared to pure Bi2212, in particular at low fields, below 3 T, and in a temperature range between 45 and 85 K. In this temperature range, the MR effects of MT Bi2212 + 6 wt% USr2CaO6 display a maximum that may be tuned to a particular temperature within the above range, by changing the amount of added non-superconducting compound. X-ray results show that during the melt-texturing process of this mixture, the USr2CaO6 phase is stable and the reaction with Bi2212 matrix is minimal, in spite of a small decrease in the superconducting transition temperature. A cryogenic sensor was build and tested at 77 K in low fields. It shows high sensitivity and no hysteresis of resistivity when the applied field was cycled between 0 and 1 T.

Ionescu, M.; Winton, B.; Silver, T.; Dou, S. X.; Ramer, R.

2004-07-01

129

Effect of sulfated CaO on NO reduction by NH{sub 3} in the presence of excess oxygen  

SciTech Connect

The effect of sulfated CaO on NO reduction by NH{sub 3} in the presence of excess oxygen was investigated to evaluate the potential of simultaneous SO{sub 2} and NO removal at the temperature range of 700-850{sup o}C. The physical and chemical properties of the CaO sulfation products were analyzed to investigate the NO reduction mechanism. Experimental results showed that sulfated CaO had a catalytic effect on NO reduction by NH{sub 3} in the presence of excess O{sub 2} after the sulfation reaction entered the transition control stage. With the increase of CaO sulfation extent in this stage, the activity for NO reduction first increased and then decreased, and the selectivity of NH{sub 3} for NO reduction to N{sub 2} increased. The byproduct (NO{sub 2} and N{sub 2}O) formation during NO reduction experiments was negligible. X-ray photoelectron spectroscopy (XPS) analysis showed that neither CaSO{sub 3} nor CaS was detected, indicating that the catalytic activity of NO reduction by NH{sub 3} in the presence of excess O{sub 2} over sulfated CaO was originated from the CaSO{sub 4} product. These results revealed that simultaneous SO{sub 2} and NOx control by injecting NH{sub 3} into the dry flue gas desulfurization process for NO reduction might be achieved. 38 refs., 6 figs., 1 tab.

Tianjin Li; Yuqun Zhuo; Yufeng Zhao; Changhe Chen; Xuchang Xu [Tsinghua University, Beijing (China). Key Laboratory for Thermal Science and Power Engineering of Ministry of Education

2009-04-15

130

DOE-EPRI On-Line Monitoring Implementation Guidelines  

SciTech Connect

Industry and EPRI experience at several plants has shown on-line monitoring to be very effective in identifying out-of-calibration instrument channels or indications of equipment-degradation problems. The EPRI implementation project for on-line monitoring has demonstrated the feasability of on-line monitoring at several participating nuclear plants. The results have been very enouraging, and substantial progress is anticipated in the coming years.

E. Davis, R. Bickford

2003-01-02

131

Gender-specific on-line shopping preferences  

Microsoft Academic Search

This study approaches the question of whether on-line shopping preferences differ from a gender perspective. Data is collected\\u000a by the means of an on-line survey (n=170) in which male and female on-line shoppers rank the importance of various features that have an impact on their shopping\\u000a experience. The results show no gender differences at the construct level. However, when comparing

Frank Ulbrich; Tina Christensen; Linda Stankus

2011-01-01

132

Electronic trading in on-line delivered content  

Microsoft Academic Search

Electronically traded On-line Delivered Content (ODC) is data, information, and knowledge traded on the Internet or through other on-line means. ODC includes on-line newspapers, magazines, music, education, searchable databases, consulting, and eventually expertise ideas. This paper outlines the growing importance of ODC. It then attempts to position electronic trading in ODC within the wider field of Electronic Commerce. It identifies

Claudia Loebbecke

1999-01-01

133

On Robustness of On-line Boosting - A Competitive Study  

Microsoft Academic Search

On-line boosting is one of the most successful on-line algorithms and thus applied in many computer vision ap- plications. However, even though boosting, in general, is well known to be susceptible to class-label noise, on-line boosting is mostly applied to self-learning applications such as visual object tracking, where label-noise is an inher- ent problem. This paper studies the robustness of

Christian Leistner; Amir Saffari; Peter M. Roth; Horst Bischof

134

Change from three times a week on-line hemodiafiltration to short daily on-line hemodiafiltration  

Microsoft Academic Search

Change from three times a week on-line hemodiafiltration to short daily on-line hemodiafiltration.BackgroundDaily dialysis has shown excellent clinical results because a higher frequency of dialysis is more physiologic. On-line hemodiafiltration (OL-HDF) is a HDF technique that combines diffusion with high convection in which the dialysis fluid itself is used as a reinfusion solution. The aim of this study was to

Francisco Maduell; Victor Navarro; Eduardo Torregrosa; Asunción Rius; Fernando Dicenta; Maria Carmen Cruz; J. Antonio Ferrero

2003-01-01

135

Intermitência alfvênica gerada por caos na atmosfera solar e no vento solar  

NASA Astrophysics Data System (ADS)

Dados medidos no vento solar rápido proveniente dos buracos coronais revelam que os plasmas no meio interplanetário são dominados por flutuações Alfvênicas, caracterizadas por uma alta correlação entre as variações do campo magnético e da velocidade do plasma. As flutuações exibem muitas características esperadas em turbulência magneto-hidrodinâmica totalmente desenvolvida, tais como intermitência e espectros contínuos. Contudo, os mecanismos responsáveis pela evolução de turbulência Alfvênica intermitente não são completamente compreendidos. Neste trabalho a teoria de caos é usada para explicar como sistemas Alfvênicos, modelados pela equação Schrödinger não-linear derivativa e pela equação Kuramoto-Sivashinsky, podem se tornar fortemente caóticos à medida em que parâmetros do plasma são variados. Pequenas perturbações no parâmetro de dissipação podem fazer com que o sistema mude bruscamente de um regime periódico, ou fracamente caótico, para um regime fortemente caótico. As séries temporais das flutuações do campo magnético nos regimes fortemente caóticos exibem comportamento intermitente, em que fases laminares ou fracamente caóticas são interrompidas por fortes estouros caóticos. É mostrado que o regime fortemente caótico é atingido quando as soluções periódicas ou fracamente caóticas globalmente estáveis interagem com soluções do sistema que são fortemente caóticas, mas globalmente instáveis. Estas soluções globalmente instáveis são conjuntos caóticos não-atrativos conhecidos como selas caóticas, e são responsáveis pelos fortes estouros nos regimes intermitentes. Selas caóticas têm sido detectadas experimentalmente em uma grande variedade de sistemas, sendo provável que elas desempenhem um papel importante na turbulência intermitente observada em plasmas espaciais.

Rempel, E. L.; Chian, A. C.-L.; Macau, E. E. N.; Rosa, R. R.

2003-08-01

136

The kinetic rate of SO/sub 2/ sorption by CaO  

SciTech Connect

The intrinsic rate constant for the rate of reaction of SO/sub 2/ with porous CaO in an excess of O/sub 2/ to form CaSO/sub 4/ has been determined from SO/sub 2/ sorption data on a wide range of particle diameters (1..mu..m-1mm), SO/sub 2/ partial pressures (60 Pa to 5 kPa), and temperatures (973-1,478K). An intrinsic SO/sub 2/ reaction order of unity has been validated through current fixed-bed experiments in the 60 to 300 Pa SO/sub 2/ partial pressure range, while fluidized-bed data were used to validate the reaction order from 500 Pa to 5 kPa SO/sub 2/ partial pressure. The absolute value of the rate constant and the activation energy was derived from data on small (1 ..mu..m) particles, which approach the limit of kinetic control. While analysis of this data base dose minimize the role of intraparticle diffusion through the porous sorbent particle, the filling of the small pores by the product deposits and the associated loss of internal surface area is critical to the data reduction. It is believed that the intrinsic rate constant is known to the accuracy to which the reactivity and the BET surface area may be measured.

Simons, G.A.; Garman, A.R.; Boni, A.A.

1987-02-01

137

Game theory, on-line prediction and boosting  

Microsoft Academic Search

We study the close connections between game the- ory, on-line prediction and boosting. After a brief review of game theory, we describe an algorithm for learning to play repeated games based on the on-line prediction methods of Littlestone and War- muth. The analysis of this algorithm yields a sim- ple proof of von Neumann's famous minmax theo- rem, as well

Yoav Freund; Robert E. Schapire

1996-01-01

138

Chat: The Missing Link in On-Line Instruction.  

ERIC Educational Resources Information Center

As more courses in higher education move to an on-line format, a major concern that has arisen is the lack of personal interaction between the professor and student. The literature provides evidence that often on-line courses are configured and delivered in a style more often associated with independent study or correspondence work, i.e., students…

Roberson, Thelma J.; Klotz, Jack

139

Group Assessment in the On-Line Learning Environment.  

ERIC Educational Resources Information Center

|Identifies five principles for grading the products of student collaboration in on-line courses, derived from a survey of on-line instructors: thoroughly structure the project, construct the groups and match membership, monitor and communicate effectively, evaluate consistently, and evaluate the many as one. Offers a cautionary note on handling…

Nicolay, John A.

2002-01-01

140

The Challenge of Developing On-Line Courses.  

ERIC Educational Resources Information Center

|Many challenges face the communication instructor wishing to use the Internet, the World Wide Web, and other on-line resources in the classroom; most common are questions of faculty support, facilities limitations, and student limitations. While some members of communication departments may speak glowingly about the future of the on-line

Auter, Philip J.; Hanna, Michael S.

141

Algorithms for the On-Line Travelling Salesman  

Microsoft Academic Search

Abstract: In this paper the problem of efficiently serving a sequence of requests presentedin an on-line fashion located at points of a metric space is considered. We call thisproblem the On-Line Travelling Salesman Problem (OLTSP). It has a variety ofrelevant applications in logistics and robotics.

Giorgio Ausiello; Esteban Feuerstein; Stefano Leonardi; Leen Stougie; Maurizio Talamo

2001-01-01

142

Critical success factors for on-line course resources  

Microsoft Academic Search

A multiple case study was used to evaluate hypotheses on the critical success factors for on-line course resources in a tertiary setting. The evolution of educational media and methods leading up to the usage of such resources are also briefly discussed. The findings show that in order for on-line course resources (such as discussion forums) to be used (as compared

M. H. Benson Soong; Hock Chuan Chan; Boon Chai Chua; Koah Fong Loh

2001-01-01

143

System Requirements for On-Line and Batch Retrieval.  

ERIC Educational Resources Information Center

Three papers on system requirements for on-line and batch retrieval presented at the American Society for Information Science (ASIS) annual meeting are included here. At G.D. Searle, data for records related to pharmacology screening are used in a batch system, and an on-line system is used to search information on mutagenic, carcinogenic, and…

American Society for Information Science, Washington, DC. Special Interest Group on Computerized Retrieval Services.

144

On-line Performance Assessment Using Rating Scales.  

ERIC Educational Resources Information Center

On-line performance assessment was developed to maximize the usefulness of performance assessment and to minimize the time and labor costs incurred. This paper reports on the development of an on-line performance assessment instrument, focusing on the establishment and validation of the scoring rubric and its implementation in the Rasch model, the…

Stahl, John; And Others

145

Evaluation of an On-line Collaborative Examination Process  

Microsoft Academic Search

This paper presents the evaluation results of an on-line collaborative examination process. The process includes students making up questions, picking out questions, answering, grading etc. all in an on-line environment (Virtual Classroom™). Data analysis shows students have a favorable feeling towards this innovative form of exam. More than 55% of subjects agreed that they learned a great deal from having

Jia Shen; Kung-E Cheng; Yooncheong Cho; Starr Roxanne Hiltz; Michael Bieber

2000-01-01

146

Are On-Line Data Bases in Your Library's Future?  

ERIC Educational Resources Information Center

|THE FOLLOWING IS THE FULL TEXT OF THIS DOCUMENT: Today there are over 900 on-line data banks available for public access. Most microcomputers can use them through the aid of a modem and communication program. Major public information utilities that offer access to these on-line data bases are growing and expanding. The Source, a data base utility…

Deacon, Jim

1983-01-01

147

Evidence on the Effectiveness of On-Line Homework  

ERIC Educational Resources Information Center

The purpose of this research is to evaluate the impact and effectiveness of on-line homework in principles of accounting classes. We surveyed students to determine their degree of satisfaction with on-line homework and their perceptions about its effectiveness in enhancing their learning. We also gathered data to determine the extent of online…

Dillard-Eggers, Jane; Wooten, Tommy; Childs, Brad; Coker, John

2008-01-01

148

The utilization of galvanic cells using Ca??Alumina solid electrolytes in a thermodynamic investigation of the CaO AI 2 O 3 system  

Microsoft Academic Search

Ca??-alumina solid electrolytes have been used in calcium concentration electrochemical cells to determine the standard free\\u000a energies of formation of the calcium aluminates, from their constituent oxides, in the temperature ranges specified: (1) CaO(s)\\u000a + 6Al2O3(s) ? CaO6Al203(s) ?G =-4270.9 - 9.4r(K)(200)cal = -17869.4 - 39.3T (840)J; 1100 to 1500 K. (2) CaO(s) + 2Al2O3(s) ? CaO.2Al2O3(s) ?G = -3087.1

R. V. Kumar; D. A. R. Kay

1985-01-01

149

Verb agreements during on-line sentence processing in Alzheimer’s disease and frontotemporal dementia  

Microsoft Academic Search

An on-line “word detection” paradigm was used to assess the comprehension of thematic and transitive verb agreements during sentence processing in individuals diagnosed with probable Alzheimer’s Disease (AD, n=15) and Frontotemporal Dementia (FTD, n=14). AD, FTD, and control participants (n=17) were asked to listen for a word in a sentence. Unbeknownst to the participants, the target word followed an agreement

Catherine C. Price; Murray Grossman

2005-01-01

150

Phase selection in the containerless solidification of undercooled CaO · 6Al 2O 3 melts  

Microsoft Academic Search

The CaO·6Al2O3 melts were solidified on an aero-acoustic levitator under a containerless processing condition at various undercoolings. A high-speed video was operated to monitor the recalescence behavior, from which the growth velocity as a function of melt undercooling was determined. The microstructures were observed and the crystalline phases were identified using the X-ray diffraction technique, indicting that the Al2O3 was

Mingjun Li; Kazuhiko Kuribayashi

2004-01-01

151

Opposite rumpling of the MgO and CaO (100) surfaces: A density-functional theory study  

Microsoft Academic Search

Density-functional theory calculations using the periodic slab approach are carried out to investigate the relaxed structures of the regular MgO and CaO(100) surfaces. Both local density and gradient corrected approximations to the exchange-correlation energy are employed and slab orbitals are expanded in Gaussian atom-centered orbitals as well as in plane waves. For MgO, the cations are displaced downwards towards the

Dominic R. Alfonso; James A. Snyder; John E. Jaffe; Anthony C. Hess; Maciej Gutowski

2000-01-01

152

Theory of F centers in the alkaline-earth oxides MgO and CaO  

Microsoft Academic Search

We present results of a theoretical study of the electronic structure of isolated anion vacancies (F-center-like defects) in the alkaline-earth oxides MgO and CaO using the multiple-scattering-theory-based muffin-tin Green's-function method. These ab initio calculations are valence-charge self-consistent for the vacancy and first shell of cation neighbors but, at present, do not include effects due to atomic relaxation around the vacancy

Barry M. Klein; Warren E. Pickett; Larry L. Boyer; R. Zeller

1987-01-01

153

Cryogenic magnetic field sensor based on the magnetoresistive effect in bulk Bi2212+USr2CaO6  

NASA Astrophysics Data System (ADS)

A large magnetoresistive (MR) effect was observed in melt-textured (MT) Bi2212 in which USr2CaO6 was added in a proportion of 6 wt %. The resistivity measurements of MT Bi2212+6 wt % USr2CaO6 show high sensitivity to applied dc fields, as compared to pure Bi2212, in particular at low fields, below 3 T, and in a temperature range between 45 K and 85 K. In this temperature range, the MR effect of MT Bi2212+6 wt % USr2CaO6 is two orders of magnitude larger than the MR effect in pure Bi2212, and display a maximum that may be tuned to a particular temperature within the above range, by changing the amount of added nonsuperconducting compound. A cryogenic sensor was built and tested at 77 K in low fields. It shows a good sensitivity and small (~1%) hysteresis of resistivity when the applied field was cycled between 0 T and 1 T.

Ionescu, M.; Winton, B.; Silver, T.; Dou, S. X.; Ramer, R.

2004-06-01

154

CaO insulator coatings and self-healing of defects on V-Cr-Ti alloys in liquid lithium  

SciTech Connect

Electrically insulating and corrosion-resistant coatings are required at the liquid metal/structural interface in fusion first-wall/blanket applications. The electrical resistance of CaO coatings produced on V-5%Cr-5%Ti by exposure of the alloy to liquid Li that contained 0.5--85 wt.% dissolved Ca was measured as a function of time at temperatures between 250 and 600{degrees}C. The solute element, Ca in liquid Li, reacted with the alloy substrate at 400--420{degrees}C to produce a CaO coating. Resistance of the coating layer measured in-situ in liquid Li was {approx}10{sup 6} {Omega} at 400{degrees}C. Thermal cycling between 300 and 700{degrees}C changed the coating layer resistance. which followed insulator behavior. These results suggest that thin homogeneous coatings can be produced on variously shaped surfaces by controlling the exposure time, temperature, and composition of the liquid metal. The technique can be applied to various shapes(e.g., inside/outside of tubes, complex geometrical shapes) because the coating is formed by liquid-phase reaction. Examination of the specimens after cooling to room temperature revealed no spallation, but homogeneous crazing cracks were present in the CaO coating. Additional tests to investigate the in-situ self-healing behavior of the cracks indicated that rapid healing occurred at {ge}360{degrees}C.

Park, J.H.; Kassner, T.F.

1996-02-01

155

Practical experience with on-line ion chromatography  

SciTech Connect

Bettis is heavily involved in on-line ion chromatography and has gained much experience with the systems. This paper serves to pass that experience along to any users, current or prospective, that are interested in the systems. On-line IC is extremely dynamic and the developments over the past few years have helped to produce systems that can provide technical and productivity improvements. The potential uses of the systems are only beginning to be tapped. It is the information provided herein maybe useful to any interested in on-line ion chromatography.

Lynch, G.J.

1991-12-31

156

Targeting metabolomics analysis of the sunscreen agent 2-ethylhexyl 4-( N, N-dimethylamino)benzoate in human urine by automated on-line solid-phase extraction–liquid chromatography–tandem mass spectrometry with liquid chromatography–time-of-flight\\/mass spectrometry confirmation  

Microsoft Academic Search

The in vivo metabolism of the xenobiotic agent 2-ethylhexyl 4-(N,N-dimethylamino)benzoate (EDP), a UV filter commonly used in sunscreen cosmetic products, was studied by targeting metabolomics analysis in human urine. The metabolomic study involved the use of urine from male and female volunteers before and after application of an EDP-containing sunscreen cosmetic. The metabolism of EDP in urine was studied by

Zacarías León-González; Carlos Ferreiro-Vera; Feliciano Priego-Capote; María Dolores Luque de Castro

2011-01-01

157

Effect of matrix liquid phase on interphase formation in SiC fibre-reinforced Si2N2OAl2O3CaO composites  

Microsoft Academic Search

Matrix compositions based on Si2N2O, with Al2O3 and CaO additions, were used to hot press Nicalon SiC fibre-reinforced composites at 1600 °C. With both CaO and Al2O3 additions, eutectic melting formed an appreciable volume of liquid phase during hot pressing, which remained as a stable glassy phase in the cooled composites. This liquid phase fostered formation of ~240 nm thick

Hyun-Ho Shin; Y. Berta; R. F. Speyer

1995-01-01

158

A density functional theory study of the adsorption of Hg and HgCl 2 on a CaO(001) surface  

Microsoft Academic Search

The adsorption of mercury and mercury chloride on a CaO(001) surface was investigated by the density functional theory (DFT)\\u000a by using Ca9O9 cluster embedded in an electrostatic field represented by 178 point charges at the crystal CaO lattice positions. For the\\u000a mercury molecular axis normal to the surface, the mercury can only coordinate to the O2? anion and has a

Xin Guo; Chuguang Zheng; Nanxia Lu

2007-01-01

159

On-Line New Event Detection, Clustering, and Tracking.  

National Technical Information Service (NTIS)

In this work, we discuss and evaluate solutions to text classification problems associated with the events that are reported in on-line source of news. We present solutions to three related classification problems: new event detection, event clustering, a...

R. Papka

1999-01-01

160

On-Line Texture Diagnostics for Coated Conductor Manufacture.  

National Technical Information Service (NTIS)

This Phase I project was undertaken to assess the feasibility of implementing a particular diagnostic method for characterizing the crystallographic texture of high temperature superconductor (HTS) coated conductors on-line during their reel-to-reel conti...

2002-01-01

161

Astronomical Journal On-line Back to Volume 1; 1849  

NASA Astrophysics Data System (ADS)

With permission from the AAS, the Astrophysics Data System has scanned the Astrophysical Journal back to Volume 1; 1849. The complete AJ is now available on-line. The scanned volumes 1-114 (1849-1997) are available through the ADS, subsequent volumes are available through the on-line library at the University of Chicago Press. Putting the complete AJ on-line was helped greatly by Jane Holmquist and Alain Tschanz, Princeton Librarians, who provided us with the tables of contents for all the early AJ volumes in electronic form. The AJ has been on-line back to the 1944 issues for almost one year. We present access statistics that show that there is consistent use of even the oldest on-line volumes. This indicates that the historical literature is important for Astronomers. Having this literature available on-line will enable researchers to easily access information that is currently not available everywhere and can sometimes not be used freely because of the deteriorating conditions of some of the older journals and books. To further increase the availability of the historical literature, we have started to put scans of historical observatory literature on-line in collaboration with the Harvard Library. The Harvard Library, in collaboration with the library of SAO is microfilming publications of astronomical observatories. The ADS scans these microfilms and makes the page images available together with the regular journal literature. Plans for longer-range future enhancements of the access to the historical literature include the conversion of the scanned images to electronic text through Optical Character Recognition (OCR). This will enable researchers to search the complete on-line literature. We need your help: We are looking for conference proceedings and review book tables of contents pre-1950. If you can provide us with an electronic version of your favorite old conference proceedings or book of review articles, it would help us greatly to increase our coverage of the historical literature.

Eichhorn, G.; Kurtz, M. J.; Accomazzi, A.; Grant, C. S.; Murray, S. S.

1998-12-01

162

On-line sample preconcentration techniques in micellar electrokinetic chromatography  

Microsoft Academic Search

This review provides an overview as well as a practical understanding of on-line sample concentration techniques in micellar electrokinetic chromatography (MEKC). MEKC as well as other capillary electrophoretic modes suffer from low concentration sensitivity due to minute sample volume and limited optical pathlength for on-capillary photometric detection. Two on-line sample preconcentration techniques, sample stacking and sweeping are known to be

Jong-Bok Kim; Shigeru Terabe

2003-01-01

163

Using On-Line Sensors in Statistical Process Control  

Microsoft Academic Search

As manufacturing technology moves toward more computerized automation, statistical process control (SPC) techniques must adapt to keep pace with the new environment and take advantage of the development in automated on-line sensors. In this paper, a two-phase procedure is proposed for combining an on-line sensor and a control chart to improve statistical process control decisions. In phase 1 of this

Linguo Gong; Wushong Jwo; Kwei Tang

1997-01-01

164

On-line fault detection of sensor measurements  

Microsoft Academic Search

On-line fault detection in sensor networks is of paramount importance due to the convergence of a variety of challenging technological, application, conceptual, and safety related factors. We introduce a taxonomy for classification of faults in sensor networks and the first on-line model-based testing technique. The approach is generic in the sense that it can be applied on an arbitrary system

Farinaz Koushanfar; Miodrag Potkonjak; Alberto Sangiovanni-Vincentelli

2003-01-01

165

On-line point positioning with single frame camera data  

NASA Astrophysics Data System (ADS)

The project on-line point positioning with single frame camera data was concluded. The goal of the project was to develop a data processing concept for an on-line high accuracy point positioning system. An operational on-line system, installed in a UNIX environment under the programming language C, for aerial phototriangulation working on an analytical plotter or on a digital workstation should provide high speed of operation, accuracy of results, and ease of data management. Established tests showed that the Sun Microsystems workstations have sufficient memory capacity and speed performance to run on-line triangulation applications. The adopted algorithms in the on-line triangulation system for the computation of initial values, for the sequential and simultaneous adjustment and for quality control will be presented in this report. A description of the developed software modules and the program will also be given. Although this system was designed and developed specifically for aerial triangulation, it is anticipated that future applications for on-line triangulation algorithms and methods will be found in robotics and industrial quality control.

Gruen, A.

1992-03-01

166

Recycling and waste minimisation behaviours of the transient student population in Oxford: results of an on-line survey  

Microsoft Academic Search

Due to growing pressure to meet recycling targets set by the UK central government, it is becoming increasingly important for local authorities to understand the characteristics of recycling behaviour and the factors that influence them. The demographic, situational and psychological factors that influence recycling behaviour were drawn from existing empirical research studies and used to create an on-line survey of

Sally Robertson; Helen Walkington

2009-01-01

167

Improved Retrieval of Chlorophyll and Carotenoids Contents at the Canopy Scale Using Hyperspectral CAO Data and PROSAIL Model  

NASA Astrophysics Data System (ADS)

The sustainability of biodiversity requires frequent and spatially detailed assessment of species number and distribution, among other information. Remote sensing is one of the most promising way to achieve this environmental management due to reasonable cost and accuracy. However, the use of airborne and spaceborne data remains challenging: sensors must combine the appropriate spatial and spectral resolutions to retrieve pertinent environmental parameters that will permit identification of specific properties of organisms present in an ecosystem. Leaf area index (LAI), canopy structure and pigment composition of vegetation are valuable information to study ecosystem dynamics and distinguish between many species. Chlorophyll and carotenoid pigments are of particular interest because they are involved in photosynthesis, but until now, remote sensing was unable to assess these pigments separately and accurately. Some advances have been made recently with the separation of these pigments in PROSPECT-5, a radiative transfer model that simulates leaf spectral reflectance and transmittance at 1 nm resolution. PROSAIL, the joint vegetation canopy reflectance model associating PROSPECT-5 with 4SAIL, the latest version of the SAIL model, was first run in direct mode to design vegetation indices sensitive to leaf pigments. Subsequently, we retrieved chlorophyll and carotenoid contents using PROSAIL with CAO (Carnegie Airborne Observatory) data acquired in Hawaii. The CAO, an imaging spectrometer coupled with a 3-D laser scanner, has already demonstrated its ability to manage biodiversity in various ecosystems like tropical rainforests or savannah. Its performance make it particularly adapted to assess vegetation structure, biochemistry, and then fluxes. The first results obtained when processing CAO images with PROSAIL are promising in terms of chlorophyll and carotenoid retrieval at the canopy scale. They show that our approach can provide original information on vegetation and hopefully new indicators to help manage and conserve biodiversity. They open new fields of investigation in the domain of mapping and monitoring Earth ecosystems from present operational (Aviris, Hyperion) or future (EnMap, HyspIRI) airborne and spaceborne sensors offering high spectral resolution data.

Feret, J.; Asner, G. P.; Jacquemoud, S.; François, C.

2008-12-01

168

Behavioral responses of Cao Vit gibbon (Nomascus nasutus) to variations in food abundance and temperature in Bangliang, Jingxi, China.  

PubMed

The Cao Vit gibbon is a critically endangered species with only about 110 individuals remaining in a degraded karst forest along the China-Vietnam border. Behavioral data from this site are particularly useful in understanding gibbon behavioral adaptations to different sets of ecological conditions and will contribute to the conservation of the species. We studied seasonal variation in the time budget and diet of the Cao Vit gibbon in response to variation in food availability and ambient temperature by observing two groups for 1,379 hr between January and December 2009. We used 5-min scan samples to record the activity of gibbons. Both ambient temperature and food availability varied from month to month. Gibbon groups increased resting time and huddled together in sleeping places in cold months. Gibbons spent more time feeding on fruit when fruit was more abundant suggesting that fruit was their preferred food. Alternatively, leaf eating was negatively correlated with leaf availability which suggested that leaves may be used as a fallback food. Gibbons increased their diet diversity when they ate more leaves. This might be a strategy to cope with toxins or digestion inhibitor accumulation associated with feeding from a limited number of leaf species. Individuals consumed more buds when Broussonetia papyrifera produced buds in March and April. During this period, they decreased traveling time and engaged in less frequent social interactions. Gibbons spent more time searching for and feeding on invertebrates during June and October. However, we did not collect data on invertebrate abundance and therefore cannot determine the relationship between invertebrate feeding and availability. We conclude that flexibility in consuming diverse food types and food species, and in responding to the availability of preferred foods, has enabled the Cao Vit gibbon to survive in a degraded karst forest habitat. PMID:22553151

Fan, Peng-Fei; Fei, Han-Lan; Ma, Chang-Yong

2012-05-02

169

Making sense out of CAOS: Preliminary results on the Paleozoic-Mesozoic deformation of the Central Asian Orogenic System  

NASA Astrophysics Data System (ADS)

There are two contrasting models for the tectonic evolution of accretionary orogens, both based on the Paleozoic geology of the Central Asian Orogenic System (CAOS), which is located between the Siberian, European, and Chinese cratons. One model requires that syn-subduction strike-slip faults with more than 1000 km of displacement control the construction of accretionary orogens, whereas a second model suggests that thrust faults are responsible for shortening during and after arc magmatism. Specifically for the CAOS, previous studies show that igneous activity occurred in two episodes at 408-377 Ma and 344-290 Ma. The early phase is marked by calc-alkaline magmatism and occurred in an island-arc setting while the second phase exhibits geochemical characteristics of post-collisional magmatism. In the context of the existing pluton geochronology and geochemical interpretations, the first tectonic model requires CAOS strike-slip faulting to be Devonian in age, whereas the second requires that thrust faulting is as young as Permian. We completed field mapping, U-Th-Pb geochronology, thermobarometry, and 40Ar/39Ar thermochronology to determine the nature of tectonic contacts, timing and extent of metamorphism and deformation, and low temperature exhumation history of the southern Altai Mountains in NW China. Our results show that at least three northeast-dipping thrust faults were responsible for crustal shortening of at least 50%. The Ertix fault (also known as the Irtysh fault) juxtaposes high-grade metamorphic rocks from > 20 km depth against a Devonian-Carboniferous arc sequence. Thermochronologic data suggest that rocks were exhumed during motion on the Ertix fault between 280 Ma and 260 Ma. The Kuerti thrust, a range-bounding thrust fault, was exhuming rocks in its hanging-wall between 270 and 200 Ma. The Barils thrust was responsible for exhumation and cooling of lower amphibolite-grade hanging-wall rocks between 230 and 150 Ma. Minor orogen-parallel sinistral shear occurred after 261 Ma, based on zircon ages from a deformed granitoid. Our data suggest that major deformation, primarily accomplished by thrusting, occurred after the termination of arc magmatism in the CAOS, and does not support tectonic models requiring major syn-subduction strike-slip faulting during accretionary orogen development.

Briggs, S. M.; Yin, A.; Manning, C. E.

2005-12-01

170

Engagement of parents in on-line social support interventions.  

PubMed

The purpose of this scoping review was to determine what the relevant research informs us about which parents of children with chronic disease and/or disability are likely to engage in an on-line social support program and why they choose to be engaged. The review included 16 peer-reviewed research reports about on-line social support offered to parents of children with chronic disease and/or disability. It was conducted using scoping review approaches recommended by H. Arskey and L. O'Malley (2005). A key finding of this review is that it appears that the development of on-line social support interventions for parents may not have integrated what is known in the field of Internet technology as necessary to engage users. This has implications for nurses wishing to provide on-line social support for parents. As well, it highlights future directions for research, including investigations of which parents are likely to engage in on-line social support interventions and the features of the intevention that will attract and sustain them as participants. PMID:22710151

Paterson, Barbara L; Brewer, Joan; Stamler, Lynnette Leeseberg

2012-06-15

171

On-line microwave total solids sensoring in sewage characterization.  

PubMed

We describe a novel application for a microwave on-line sensor to measure the total solids (TS) load entering a municipal wastewater treatment plant (WWTP) from slaughterhouse sewage and some sanitary wastewaters. Measuring this kind of wastewater stream is very challenging, because it contains a high, but varying organic load with nitrogen, phosphorus and microorganisms. The reliability of the measured signal was studied by comparison with laboratory analyses and a correlation is presented of TS-value with other parameters that are typically followed in a wastewater treatment process. The results suggest that on-line microwave sensoring could be used to monitor total solids in wastewater influent. Our results show that the on-line microwave sensor and laboratory reference analyses give similar results with a good correlation between the two techniques. Furthermore, we demonstrate that the total solids values correlate well with conductivity, total nitrogen and BOD(7) values but not with phosphorus, pH and temperature. PMID:19380993

Poutiainen, H; Laitinen, S; Juntunen, P; Heinonen-Tanski, H

2009-01-01

172

An on-line replanning method for head and neck adaptive radiotherapy.  

PubMed

Daily setup for head and neck (HN) radiotherapy (RT) can vary randomly due to neck rotation and anatomy change. These differences cannot be totally corrected by the current practice of image guided RT with translational repositioning. The authors present a novel rapid correction scheme that can be used on-line to correct both interfractional setup variation and anatomy change for HN RT. The scheme consists of two major steps: (1) Segment aperture morphing (SAM) and (2) segment weight optimization (SWO). SAM is accomplished by applying the spatial relationship between the apertures and the contours of the planning target and organs at risk (OARs) to the new target and OAR contours. The new target contours are transferred from planning target contours to the CT of the day by means of deformable registration (MIMVISTA). The dose distribution for each new aperture was generated using a planning system with a fast dose engine and hardware and was input into a newly developed SWO package using fast sequential quadratic programming. The entire scheme was tested based on the daily CT images acquired for representative HN IMRT cases treated with a linac and CT-on-Rails combo. It was found that the target coverage and/or OAR sparing was degraded based on the CT of the day with the current standard repositioning from rigid registration. This degradation can be corrected by the SAM/SWO scheme. The target coverage and OAR sparing for the SAM/SWO plans were found to be equivalent to the original plan. The SAM/SWO process took 5-8 min for the head and neck cases studied. The proposed aperture morphing with weight optimization is an effective on-line approach for correcting interfractional patient setup and anatomic changes for head and neck cancer radiotherapy. PMID:19928108

Ahunbay, Ergun E; Peng, Cheng; Godley, Andrew; Schultz, Christopher; Li, X Allen

2009-10-01

173

On-Line Metrology with Conoscopic Holography: Beyond Triangulation  

PubMed Central

On-line non-contact surface inspection with high precision is still an open problem. Laser triangulation techniques are the most common solution for this kind of systems, but there exist fundamental limitations to their applicability when high precisions, long standoffs or large apertures are needed, and when there are difficult operating conditions. Other methods are, in general, not applicable in hostile environments or inadequate for on-line measurement. In this paper we review the latest research in Conoscopic Holography, an interferometric technique that has been applied successfully in this kind of applications, ranging from submicrometric roughness measurements, to long standoff sensors for surface defect detection in steel at high temperatures.

Alvarez, Ignacio; Enguita, Jose M.; Frade, Maria; Marina, Jorge; Ojea, Guillermo

2009-01-01

174

Threshold Equalization for On-Line Signature Verification  

NASA Astrophysics Data System (ADS)

In on-line signature verification, complexity of signature shape can influence the value of the optimal threshold for individual signatures. Writer-dependent threshold selection has been proposed but it requires forgery data. It is not easy to collect such forgery data in practical applications. Therefore, some threshold equalization method using only genuine data is needed. In this letter, we propose three different threshold equalization methods based on the complexity of signature. Their effectiveness is confirmed in experiments using a multi-matcher DWT on-line signature verification system.

Nakanishi, Isao; Sakamoto, Hiroyuki; Itoh, Yoshio; Fukui, Yutaka

175

Optical sensors for on-line inspection of industrial materials  

SciTech Connect

Recent work on the development of optical sensors for on-line inspection of industrial materials is reviewed. Examples include on-line thickness profilometry for sawmill process control, polymer morphology analysis by light-scattering techniques, lubricant oil quantification on aluminum sheets, in-process inspection of plasma sprayed particles, and infrared temperature sensing in a continuous annealing furnace. The emphasis is on noncontact techniques well suited to automation and specifically adapted to each particular application with minimal perturbation of the industrial process.

Cielo, P. (National Research Council Canada, Quebec (Canada))

1993-09-01

176

Giant dielectric constant response of the composites in ternary system CuO-TiO{sub 2}-CaO  

SciTech Connect

The subsolidus phase relations of the ternary system CuO-TiO{sub 2}-CaO sintered at 950 deg. C in air have been determined by powder X-ray diffraction method. Only one ternary compound CaCu{sub 3}Ti{sub 4}O{sub 12} was found in this system. From room-temperature dielectric property mapping at 10 kHz, a giant dielectric constant (epsilon{sub r}>10{sup 4}) was observed for most of the ceramic composites in the CuO-rich region and in the region along the CaO-CuO binary line. The composites in the CaCu{sub 3}Ti{sub 4}O{sub 12}-rich region were found to give a comparable giant dielectric constant when sintered at 1050 deg. C. The particular microstructure of larger grains with predominant phase surrounded by smaller grains with the secondary phases was found in such composites with a high dielectric constant. The relations between structures and dielectric properties were investigated. An internal barrier layer capacitance effect is the most probable mechanism to explain this particular dielectric behavior. - Graphical Abstract: In the ternary system, CuO-TiO{sub 2}-CaO, a giant dielectric constant (epsilon{sub r}) above 10{sup 4} (red color) was observed in most of the composites sintered at only 950 deg. C in the CuO-rich region. Dashed lines show the phase boundaries.

Veith, Michael, E-mail: Michael.Veith@inm-gmbh.d [INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbruecken (Germany); Ren Shuhua; Wittmar, Matthias; Bolz, Henning [INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbruecken (Germany)

2009-10-15

177

Generation of hydrogen from polyvinyl chloride by milling and heating with CaO and Ni(OH)2.  

PubMed

This work discusses an alternative process option for the treatment of polyvinyl chloride (PVC) by producing hydrogen (H(2)) gas, at the same time fixing chlorine for proper environmental control. In the first-stage, a milling operation is performed in a planetary ball mill to obtain a mixture of PVC sample with CaO and Ni(OH)(2) to be used as feed in the second-step, involving heating of the milled product. Analyses by thermogravimetry-mass spectroscopy (TG-MS) and gas chromatography (GC) showed H(2), CH(4), CO and CO(2) as main constituents. The results clearly show that addition of Ni(OH)(2) to provide nickel as catalyst and CaO as adsorbent to fix CO(2) and HCl gases generated during heating, assisted in clean H(2) generation with concentration near 90% at temperatures between 450 and 550 degrees C. Analyses of solids after heating by X-ray diffraction and TG-DTA techniques showed both CaOHCl and CaCO(3) as main phases in the product. This process could be developed to treat PVC wastes together with other polymers and/or plastic wastes for production of H(2) gas. PMID:19231073

Tongamp, William; Zhang, Qiwu; Shoko, Miyagi; Saito, Fumio

2009-01-30

178

Charge competition with oxygen molecules determines the growth of gold particles on doped CaO films.  

PubMed

The influence of gas-phase oxygen on the growth of Au nanoparticles on Mo-doped CaO films has been investigated by means of low temperature scanning tunnelling microscopy and X-ray photoelectron spectroscopy. Whereas at ideal vacuum conditions, only 2D Au islands develop on the oxide surface, the fraction of 3D deposits increases with increasing O2 pressure until they become the dominant species in 106 mbar oxygen. The morphology crossover arises from changes in the interfacial electron flow between Mo donors in the CaO lattice and different ad-species on the oxide surface. In the absence of 02 molecules, the donor electrons are predominately transferred to the Au ad-atoms, which consequently experience enhanced binding to the oxide surface and agglomerate into 2D islands. In an oxygen atmosphere, on the other hand, a substantial fraction of the excess electrons is trapped by adsorbed O2 molecules, while the Au atoms remain neutral and assemble into tall 3D particles that are typical for non-doped oxides. Our experiments demonstrate how the competition for charge between different adsorbates governs the physical and chemical properties of doped oxides, so widely used in heterogeneous catalysis. PMID:24015581

Cui, Yi; Huang, Kai; Nilius, Niklas; Freund, Hans-Joachim

2013-01-01

179

Self-Checking on-Line Testable Static RAM.  

National Technical Information Service (NTIS)

This is a fault-tolerant random access memory for use in fault-tolerant computers. It comprises a plurality of memory chips each comprising a plurality of on-line testable and correctable memory cells disposed in rows and columns for holding individually ...

S. Chau D. Rennels

1990-01-01

180

On-line analysis of the TCP acknowledgment delay problem  

Microsoft Academic Search

We study an on-line problem that is motivated by the networking problem of dynamically adjusting of acknowledgments in the Transmission Control Protocol (TCP). We provide a theoretical model for this problem in which the goal is to send acks at a time that minimize a linear combination of the cost for the number of acknowledgments sent and the cost for

Daniel R. Dooly; Sally A. Goldman; Stephen D. Scott

2001-01-01

181

Power system network modeling for on-line analysis  

Microsoft Academic Search

On-line power system analysis enables to make power mode-related decision based on information available at real time. The quality of the studies and efficiency of power system operation are closely associated with the accuracy of the power system models. Accurate and quick decision based on analysis on real time data has been necessary for making operational plan under the deregulation

Abhimanyu Gartia; Nallarasan; S. P. Barnwal; G. Madhukar

2009-01-01

182

On-Line Load Balancing of Temporary Tasks  

Microsoft Academic Search

This paper considers the nonpreemptive on-line load balancing problem where tasks havelimited durationin time. Upon arrival, each task has to be immediately assigned to one of the machines, increasing the load on this machine for the duration of the task by an amount that depends on both the machine and the task. The goal is to minimize the maximum load.

Yossi Azar; Bala Kalyanasundaram; Serge A. Plotkin; Kirk R Pruhs; Orli Waarts

1997-01-01

183

Bayesian on-line learning of driving behaviors  

Microsoft Academic Search

This paper presents a novel self-supervised on- line learning method to discover driving behaviors from data acquired with an inertial measurement unit (IMU) and a cam- era. Both sensors where mounted in a car that was driven by a human through a typical city environment with intersections, pedestrian crossings and traffic lights. The presented system extracts motion segments from the

Jerome Maye; Rudolph Triebel; Luciano Spinello; Roland Siegwart

2011-01-01

184

Model for blast furnace on-line simulation  

Microsoft Academic Search

A blast furnace simulation model developed primarily for on-line application is presented. The model, which describes the steady-state operation of the furnace in one spatial dimension, is adapted to data from the real process by adjusting a set of parameters. A thermodynamic process interface provides the boundary conditions. The model, which is shown to act as an intelligent measurement device

H. Saxén; H. Uusi-Honko; A. Kilpinen

185

System Requirements for On-Line and Batch Retrieval.  

National Technical Information Service (NTIS)

Three papers on system requirements for on-line and batch retrieval presented at the American Society for Information Science (ASIS) annual meeting are included here. At G.D. Searle, data for records related to pharmacology screening are used in a batch s...

1976-01-01

186

Low Cost Scheme for On-Line Clock Skew Compensation  

Microsoft Academic Search

In this paper we propose a novel buffer scheme that is able to compensate undesired skews between clocks of a synchronous system in a negligible time upon skew occurrence, thus being suitable also for on-line clock-skew correction. Clock signals are aligned one with respect to the other, starting from a reference clock, and moving forward among physically adjacent clock signals,

Martin Omaña; Daniele Rossi; Cecilia Metra

2005-01-01

187

On-line inspection system for train wheel dimensions  

Microsoft Academic Search

This paper introduces three types of on-line inspection system for train wheel dimensions developed by the authors in recent years. The first system is an inspection line for semi-manufacturing wheel used for the wheels just after rolling. Then, the second system is used to inspecting the manufactured wheels at the end of the wheel manufacturing flow. Thirdly, a wheel profile

Shanxi Deng; Zhanyong Hong; Guoqiang Lv; Yongyue Yang

2005-01-01

188

ON LINE DETECTION OF FECAL CONTAMINANTS USING MULTISPECTRAL IMAGING SYSTEM  

Technology Transfer Automated Retrieval System (TEKTRAN)

A common aperture multispectral imaging system with three optical trim filters (515.4, 566.4 and 631 nm), which were selected by visible/NIR spectroscopy and validated by a hyperspectral imaging system, was developed for a real-time, on-line poultry safety inspection application. In conjunction with...

189

On-Line Bin Packing in Linear Time.  

National Technical Information Service (NTIS)

This paper studies the one-dimensional on-line bin packing problem. A list of pieces, each of size between zero and unity are to be packed, in order of their arrival, into a minimum number of unit-capacity bins. The authors present a new linear-time algor...

P. Ramanan D. J. Brown

1983-01-01

190

Scheduling Uniform Machines On-Line Requires Nondecreasing Speed Ratios.  

National Technical Information Service (NTIS)

We consider the following on-line scheduling problem. We have to schedule n independent jobs, where n is unknown, on m uniform parallel machines so as to minimize the makespan; preemption is allowed. Each job becomes available at its release date, and thi...

A. P. A. Vestjens

1994-01-01

191

Optimal On-Line Algorithms for Single-Machine Scheduling.  

National Technical Information Service (NTIS)

The authors consider single-machine on-line scheduling problems where jobs arrive over time. A set of independent jobs has to be scheduled on the machine, where preemption is not allowed and the number of jobs is unknown in advance. The authors deal with ...

J. A. Hoogeveen A. P. A. Vestjens

1995-01-01

192

On-line data registration in OUTDOOR environment  

Microsoft Academic Search

In the paper an algorithm of 3D data registration based on CUDA implementation is shown. The research is related to the problem of collecting 3D data with laser mea- surement system mounted on rotated head, to be used in mobile robot applications. Assumed performance of data registration algorithm is achieved, therefore it can used as On-line . The ICP (Iterative

Janusz Bedkowski; Andrzej Maslowski

2011-01-01

193

Global feature selection for on-line signature verification  

Microsoft Academic Search

A large number of features can be used to represent on-line handwritten signatures in verification tasks. Depending on the signature database and acquisition conditions, some features will not help in separating writers in the feature space so that an appropriate decision boundary will be hard to estimate. Other features will provide good separability between legitimate system users and their forgers.

Hamed Ketabdar; Jonas Richiardi; Andrzej Drygajlo

194

Identity authentication using improved on-line signature verification method  

Microsoft Academic Search

We present a system for on-line handwritten signature verification. During enroll- ment, eight reference signatures are taken from each subject and statistics describ- ing the variation in the user's signatures are extracted from the cross alignment of these. A test signature's authenticity is established by first aligning it with each reference signature for the claimed user. Then, using the alignment

Alisher Kholmatov; Berrin Yanikoglu

195

Novel vehicle detection system based on line scan camera  

Microsoft Academic Search

In order to improve the precision and real-time character of the traditional video-based traffic detector, a novel vehicle detection system based on line scan camera is developed. In this system, the vertical view images of vehicles are captured by two line scan cameras which are mounted on the pole's arm over the roadway; The distance between two cameras is 2

Zhigang Xu; Xiangmo Zhao; Na Li

2009-01-01

196

Designing an on-line map tool for Dutch farmers  

Microsoft Academic Search

This paper describes our real life experience in designing an on-line map user interface for the Dutch farmers. The project challenge was to design a simple user interface for advanced mapping technology in a critical schedule. The domain involved understanding of several technical and legal constraints. We studied the context of use, designed the user interface concept, evaluated a prototype

Karin van der Hiele; Rob van der Haar; Raghu Kolli

2003-01-01

197

On-line control of machine tool vibration in turning  

Microsoft Academic Search

This paper presents a system developed for on-line vibration control on a turning lathe. Relative vibration between the workpiece and the cutting tool is sensed with the help of a bifurcated bunch of optical fibres which is then phase shifted, amplified and fed back to a specially designed piezoelectric vibrator supporting the tool. Whenever a vibration occurs, leading the machine

S. K. Choudhury; N. N. Goudimenko; V. A. Kudinov

1997-01-01

198

Towards on-line analytical mining in large databases  

Microsoft Academic Search

Great efforts have been paid in the Intelligent Database Systems Research Lab for the research and development of efficient data mining methods and construction of on-line analytical data mining systems.Our work has been focused on the integration of data mining and OLAP technologies and the development of scalable, integrated, and multiple data mining functions. A data mining system, DBMiner, has

Jiawei Han

1998-01-01

199

MOBILE FACILITY FOR ON-LINE FLUE GAS CHARACTERISATION  

Microsoft Academic Search

Eskom Holdings and Tswane University of Technology (TUT) initiated a research project for the mitigation of coal burning power station flue gas pollutants. It was decided to carry out pulsed corona flue gas characterisation on-line in this project on a side-stream at an operating pulverised fuel burning power station. In this, removal energies against removal percentages would be determined for

P. H. Swart; R. Strydom; Dyk K Dhaver-Young; M. Beeslaar; R Hansen; Eskom TUT

200

On-line insulation diagnostics for current transformers  

Microsoft Academic Search

High voltage current transformers (CTs) perform a secondary function in a power utility. In the Transmission group in Eskom, more than 30% of over 10000 CTs have been in service for more than 30 years. A real need exists for a method by which on-line partial discharge (pd) measurements can be recorded which translate into a qualitative interpretation of the

Richard Evert; Derek Hoch

2004-01-01

201

Soft sensors development for on-line bioreactor state estimation  

Microsoft Academic Search

During a fermentation process, variables such as concentrations are determined by off-line laboratory analysis, making this set of variables of limited use for control purposes. However, these variables can be on-line estimated using soft sensors. The objective of this study is to present the state of the art of state estimator techniques. Special attention was given to filtering techniques, namely

Adilson José de Assis; Rubens Maciel Filho

2000-01-01

202

Emotional states control for on-line game avatars  

Microsoft Academic Search

Although detailed animation has already been achieved in a number of Multi-player On-line Games (MOGs), players have to use text commands to control emotional states of avatars. Some systems have been proposed to implement a real-time automatic system facial expression recognition of players. Such systems can then be used to control avatars emotional states by driving the MOG's \\

Ce Zhan; Wanqing Li; Farzad Safaei; Philip Ogunbona

2007-01-01

203

The Nearness of You: Students & Teachers Writing On-Line.  

ERIC Educational Resources Information Center

|This book is a guide to using new computer technologies in innovative ways to teach writing, particularly imaginative writing. The book shows how on-line technology can be a positive tool in the classroom, if the focus is on the users of the technology and the technology is integrated into the curriculum. The book is divided into five sections…

Edgar, Christopher, Ed.; Wood, Susan Nelson, Ed.

204

On-Line Computer Techniques in Shared Cataloging  

ERIC Educational Resources Information Center

This report pertains to a large research library beginning the change-over to shared cataloging by an on-line system, and the early stages of the implementation of computer techniques for part of the technical processes system of the Ohio College Library Center (OCLC). (Author)

Kniesner, Dan L.; Meyer, Betty J.

1973-01-01

205

A comparison of reading paper and on-line documents  

Microsoft Academic Search

We report on a laboratory study that compares reading from paper to reading on-line. Critical differences have to do with the major advantages paper offers in supporting annotation while reading, quick navigation, and flexibility of spatial layout. These, in turn, allow readers to deepen their understanding of the text, extract a sense of its structure, create a plan for writing,

Kenton O'Hara; Abigail Sellen

1997-01-01

206

On-Line Learning and the Implications for School Design  

ERIC Educational Resources Information Center

|"Disrupting Class," published in 2008, is the story of how disruptive innovation, innovation that changes the business model organizations, will fundamentally change the American school system. The book's most startling prediction is that half of all high school classes will be on-line by 2019. In considering these predictions, the author began…

Stack, Greg

2011-01-01

207

On-line partial discharge detection in cables  

Microsoft Academic Search

This paper describes an on-line PD (partial discharge) detection technique applicable to power cables. The method can be applied to both wire screen and solid shielded cables. In wire screen shielded cables, PD components with frequencies <100 MHz can be detected at distances over 150 m from the source, PD activity with levels as low as 20 pC can be

N. H. Ahmed; N. N. Srinivas

1998-01-01

208

Section BB Hatch Coating; Framing Plan on Line C Lodging ...  

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

Section B-B Hatch Coating; Framing Plan on Line C Lodging Knees at Hatch; Elevation A-A Hull Framing; Section at Hatch Frame 36, Starboard Looking Aft; Midship Section Frame 37, Port Looking Aft - Steam Schooner WAPAMA, Kaiser Shipyard No. 3 (Shoal Point), Richmond, Contra Costa County, CA

209

Experience in putting the Kiskore hydroelectric power plant on line  

Microsoft Academic Search

The article concentrates on safety measures, equipment installation schedules and sequencing, equipment startup procedures, and preventive and emergency shutdown procedures in putting the Kiskore hydropower plant in central SE Hungary on line. Cooperation between French and Hungarian factories, which enterprises handled manufacture and installation of turbine, switchgear, electrical machinery, or retaining structures, and data on turbine and shaft seals are

G. Laki

1976-01-01

210

Maximising opportunities for learning: Sexuality education on-line  

Microsoft Academic Search

The provision of sexual health care requires health professionals to select the level of care appropriate for themselves, their clients and the particular clinical situation. This allows for flexibility in the service provided to the client. . This paper describes a sexuality education unit offered as an on-line course that meets this goal by (a) selecting a pedagogic model (PLISSIT)

Patricia Weerakoon; May Wong

2002-01-01

211

Switched reluctance motor modeling with on-line parameter identification  

Microsoft Academic Search

A nonlinear model with on-line parameter estimation using recursive identification for switched reluctance motors (SRMs) is presented. The model is robust toward parameter variations in the motor or any system disturbances. The parameters of the model are adjusted to account for errors in rotor position, which allows the use of crude inexpensive position sensors. The proposed modeling approach allows self-tuning

Sayeed Mir; Iqbal Husain; Malik E. Elbuluk

1998-01-01

212

EPA'S ON-LINE CALCULATORS AND TRAINING COURSE  

EPA Science Inventory

EPA has developed a suite of on-line calculators called "OnSite" for assessing transport of environmental contaminants int the subsurface. The calculators are available on the Internet at http://www.epa.gov/athens/onsite, and are divided into four categories: Parameter Estimate...

213

A new on-line cash check scheme  

Microsoft Academic Search

This paper presents a new on-line cash check scheme which guarantees payor anonymity and improves upon existing similar schemes in efficiency and security. 1. rntroduction Electronic commerce, which combines the effi- ciency of computerization and networking, is going to dramat- ically change the way in which business is conducted today. One of the key issues for the realization of electronic

Robert H. Deng; Yongfei Han; Albert B. Jeng; Teow-Hin Ngair

1997-01-01

214

Fast, On-Line Learning of Globally Consistent Maps  

Microsoft Academic Search

To navigate in unknown environments, mobile robots require the ability to build their own maps. A major problem for robot map building is that odometry-based dead reckoning cannot be used to assign accurate global position information to a map because of cumulative drift errors. This paper introduces a fast, on-line algorithm for learning geometrically consistent maps using only local metric

Tom Duckett; Stephen Marsland; Jonathan Shapiro

2002-01-01

215

Bucknell On-Line Circulation System; A Library Staff View.  

National Technical Information Service (NTIS)

The Bucknell On-Line Circulation System (BLOCS) was designed to meet the requirements of a circulation system of the Ellen Clarke Bertrand Library of Bucknell University. The requirements for an automated system were, in sum: (1) a system whose operations...

H. Rivoire

1973-01-01

216

Automatically Deriving Structured Knowledge Bases From On-Line Dictionaries  

Microsoft Academic Search

We describe an automated strategy which exploits on-line dictionaries to construct a richly- structured lexical knowledge base. In particular, we show how the Longman Dictionary of Contemporary English (LDOCE) can be used to build a directed graph which captures semantic associations between words. The result is a huge and highly interconnected network of words linked by arcs labeled with semantic

William Dolan; Stephen D. Richardson; Lucy Vanderwende

1993-01-01

217

On-Line Estimation with the Multivariate Gaussian Distribution  

Microsoft Academic Search

We consider on-line density estimation with the multivariate Gaussian distribution. In each of a sequence of trials, the learner must posit a mean µ and covariance ; the learner then receives an instance x and incurs loss equal to the negative log-likelihood of x under the Gaus- sian density parameterized by (µ, ). We prove bounds on the regret for

Sanjoy Dasgupta; Daniel Hsu

2007-01-01

218

Motion modeling for on-line locomotion synthesis  

Microsoft Academic Search

In this paper, we propose an example-based approach to on-line locomotion synthesis. Our approach consists of two parts: motion analysis and motion synthesis. In the motion analysis part, an unlabeled motion sequence is first decomposed into motion segments, exploiting the behavior of the COM (center of mass) trajectory of the performer. Those motion segments are subsequently classified into groups of

Taesoo Kwon; Sung Yong Shin

2005-01-01

219

Power Plant Modeling using on-line Emission Monitoring  

Microsoft Academic Search

This paper describes preliminary results of a research effort aimed at minimizing environmental pollution caused by fossil-fuel power plants. The operation characteristics of electric machines were first investigated in terms of power generation, fuel consumption, and the amount of pollution released using on-line emission data from power plants. Employing system identification techniques, a set of electric machine models were developed

Urvinder S. Raina

220

Development of an Improved On-Line Gold Analyser.  

National Technical Information Service (NTIS)

This report describes the development and testing of an improved version of a previously developed on-line analyser, based on atomic-absorption spectrophotometry and electrothermal atomization, to monitor the gold in solutions from the carbon-in-pulp proc...

R. V. D. Robert G. T. W. Ormrod

1984-01-01

221

A Dynamic Model for On-Line Social Networks  

Microsoft Academic Search

We present a deterministic model for on-line social networks based on transitivity and local knowledge in social interactions. In the Iterated Local Transitivity (ILT) model, at each time-step and for every existing node x, a new node appears which joins to the closed neighbour set of x: The ILT model provably satisfles a number of both local and global properties

Anthony Bonato; Noor Hadi; Paul Horn; Pawel Pralat; Changping Wang

2009-01-01

222

An Experimental On-Line Information Retrieval System.  

ERIC Educational Resources Information Center

|This paper reports an experiment in on-line retrieval using man-machine dialogue on a remote console. Message editing procedures and the use of two command languages are described. The system employs a PDP-8 computer for generating, proofreading, and editing messages, and an IBM 7040 computer for information retrieval processing. The symbolic…

Cautin, Harvey; And Others

223

On-line Data Bases I. Use of Commercially Vended On-line Data Bases by Academic Libraries.  

ERIC Educational Resources Information Center

Part 1 of this study is an exploratory look at the use of on-line services in academic libraries. For this study Lockheed and System Development Corporation (SDC) were contacted and each listed a number of libraries which used their services. Academic libraries using MEDLINE were contacted, under the assumption that they also used other systems. A…

Hitchingham, Eileen E.

224

A REVIEW OF SALIENT DIMENSIONS OF ON-LINE MARKET RESEARCH: IS ON-LINE RESEARCH BETTER?  

Microsoft Academic Search

Information technology, particularly the Internet, provides alternative ways of conducting marketing research. In this paper, the role of the Internet in different kinds of research and the dimensions of research design and methodology, including sampling, measurement and data analysis, are discussed. The newly emerging literature on the benefits and limitations of on-line marketing research is presented. It is concluded that

V. Aslihan Nasir

225

(CaO · Al2O3 · SiO2): Eu phosphors for violet/ultraviolet-to-white radiation conversion  

NASA Astrophysics Data System (ADS)

(2CaO · 0.5Al2O3 · 5SiO2): Eu and (CaO · 0.2Al2O3 · SiO2): Eu phosphors doped with B2O3 in an amount of 3 wt % are obtained by direct solid-phase synthesis at 1350°C. When excited by LED radiation with a maximum at 380 nm, these phosphors emit white light with color coordinates, which are close to those in the EBU and NTSC TV standards and fall into the field of white light corresponding to light warning systems according to the International Commission on Illumination (CIE).

Gurin, N. T.; Paksyutov, K. V.; Terent'ev, M. A.; Shirokov, A. V.

2012-02-01

226

Astronomy On-Line Programme Enters "hot Week"  

NASA Astrophysics Data System (ADS)

World's Biggest Astronomy WWW-Event Attracts Thousands of Students The Astronomy On-line Programme (See ESO Press Release 09/96 of 18 June 1996) began officially on 1 October and is now about to enter its most intense phase, known as the Hot Week . On 18 - 22 November, an estimated 4000 astronomy-interested, mostly young people in Europe and on four other continents will get together during five days in what - not unexpected - has become the world's biggest astronomy event ever organised on the World Wide Web. This carefully structured Programme is carried out in collaboration between the European Association for Astronomy Education (EAAE), the European Southern Observatory and the European Commission, under the auspices of the Fourth European Week for Scientific and Technological Culture. The Programme has already had a most visible impact on the school education of natural sciences in various countries; for instance, the Internet-connection of schools has been advanced in some, in order to allow groups to participate. There have been numerous contacts among the groups across the borders and there are clear signs that many Astronomy On-line participants have progressed to use the impressive possibilities of the Web in an efficient and structured way. There has been a lively media interest in Astronomy On-line all over Europe and it is expected to increase during the next week. The current status of Astronomy On-line It is obvious that the pilot function of the Astronomy On-line Programme in the use of the Web has been very effective and that the associated dissemination of astronomical knowledge has been successful. At this time, more than 650 groups have registered with Astronomy On-line. Most come from 31 different European countries and a few dozen groups are located in North and South America as well as in Asia and Australia. Together they have experienced the steady build-up of Astronomy On-line over the past weeks, by means of numerous contributions from a large number of teachers, amateur astronomers and others interested in this field of science. The Astronomy On-line concept is that of a well-structured marketplace with a number of different shops which cater to the participants with a great variety of interesting and educational activities. These range from the availability of useful links to educational and scientific Web sites all around the world, collaborative projects where many participants in different countries work together to achieve an astronomical result and, not the least, the possibility to submit observing programmes to a dozen telescopes at 10 major observatories, including La Silla in Chile. In the early phases of Astronomy On-line , coordinated observations were performed of a lunar eclipse on 27 September and a partial solar eclipse on 12 October. Both events attracted many hundreds of observers from groups in almost all European countries and provisional reports have already been published on the Web. Many beautiful photographs and interesting reports about the activities of the individual groups are also available at their special Web sites. The Hot Week will last from Monday to Friday, 18-22 November and the time interval from 15:00-21:00 UT (16:00 - 22:00 Central European Time) will be the busiest. During this period, a variety of activities will take place. For instance, the groups will have the opportunity to contact professional astronomers at many observatories. They will also be invited to follow the other developments, e.g. the astronomical observations. The resulting images will immediately be made available on the Web. There will also be a Final Event involving all the groups. How to obtain more information about Astronomy On-line Astronomy On-line may be accessed through: http://www.eso.org/astronomyonline/ and http://www.algonet.se/~sirius/eaae.htm. National Astronomy On-line Committees have been established in many European countries. They have set up National Astronomy On-line Web-sites which can be reached directly from the sites indicated above. Information about the indivi

1996-11-01

227

A new on-line resource for psycholinguistic studies  

PubMed Central

Picture naming is a widely used technique in psycholinguistic studies. Here, we describe new on-line resources that our project has compiled and made available to researchers on the world wide web at http://crl.ucsd.edu/~aszekely/ipnp/. The website provides access to a wide range of picture stimuli and related norms in seven languages. Picture naming norms, including indices of name agreement and latency, for 520 black-and-white drawings of common objects and 275 concrete transitive and intransitive actions are presented. Norms for age-of-acquisition, word-frequency, familiarity, goodness-of-depiction, and visual complexity are included. An on-line database query system can be used to select a specific range of stimuli, based on parameters of interest for a wide range of studies on healthy and clinical populations, as well as studies of language development.

Szekely, Anna; Jacobsen, Thomas; D'Amico, Simona; Devescovi, Antonella; Andonova, Elena; Herron, Daniel; Lu, Ching Ching; Pechmann, Thomas; Pleh, Csaba; Wicha, Nicole; Federmeier, Kara; Gerdjikova, Irina; Gutierrez, Gabriel; Hung, Daisy; Hsu, Jeanne; Iyer, Gowri; Kohnert, Kathryn; Mehotcheva, Teodora; Orozco-Figueroa, Araceli; Tzeng, Angela; Tzeng, Ovid; Arevalo, Analia; Vargha, Andras; Butler, Andrew C.; Buffington, Robert; Bates, Elizabeth

2012-01-01

228

Training end-users: An on-line help package  

SciTech Connect

No matter how wonderful your INGRES application, if the end users don`t know how to use the application it will not be utilized. This paper discusses an on-line help package implemented in our manufacturing database application in order to help our user community use the application. The Materials Fabrication Division (MFD) of Mechanical Engineering is a series of machining shops that do production jobs for the Laboratory. The Fabrication Control System (FCS) is the user interface to an INGRES database. FCS tracks jobs as they traverse the machine shops and FCS maintains the employee payroll. This interface consists of VIFRED forms, menus and EQUEL Fortran code. The on-line help package is an interactive system that responds to the users ``single key stroke`` request for information. The information retrieved is based upon which help key is used and the form or menu from which the request is generated.

Waite, M.

1992-03-01

229

On-Line Terrain Parameter Estimation for Planetary Rovers  

Microsoft Academic Search

Future planetary exploration missions will require rovers to traverse very rough terrain with limited human supervision. Wheel-terrain interaction plays a critical role in rough-terrain mobility. In this paper an on-line estimation method that identifies key terrain parameters using on-board rover sensors is presented. These parameters can be used for accurate traversability prediction or in a traction control algorithm. These parameters

Karl Iagnemma; Hassan Shibly; Steven Dubowsky

2002-01-01

230

On-line sexual addiction: a contemporary enigma.  

PubMed

On-line computer bulletin boards, although screened for offensive content, have become a breeding ground for sexually related material and erotic-chat networks. Participants can interact individually or in groups (chat rooms) on a host of sexually perverse subjects. Persons afflicted with various erotic predilections via 'cybersex' have recently gained the attention of mental health professionals. The authors report on a 'cybersex' group in treatment for sexual addiction. PMID:8873813

Bingham, J E; Piotrowski, C

1996-08-01

231

Detector cooling technology for on-line process control  

NASA Astrophysics Data System (ADS)

The use of FT-IR spectrometers for on-line monitoring and process control has recently been gaining in popularity. Many of these FT-IR systems use LN2 cooled detectors. This paper discusses the use of stirling cycle cryogenic coolers for the cooling of IR detectors to liquid nitrogen temperatures (77 K). The technology of linear drive coolers, using dual opposed pistons and clearance-seal technology is discussed as a method of minimizing detector microphonics while maximizing cooler durability.

Teigland, Si R.

1993-12-01

232

On-line learning and optimization for wireless video transmission  

Microsoft Academic Search

In this paper, we address the problem of how to optimize the cross-layer transmission policy for delay-sensitive video streaming over slow-varying flat-fading wireless channels on-line, at transmission time, when the environment dynamics are unknown. We first formulate the cross-layer optimization using a systematic layered Markov decision process (MDP) framework, which complies with the layered architecture of the OSI stack. Subsequently,

Yu Zhang; Fangwen Fu; Mihaela van der Schaar

2010-01-01

233

On-Line Random Naive Bayes for Tracking  

Microsoft Academic Search

Randomized learning methods (i.e., Forests or Ferns) have shown excellent capabilities for various computer vision applications. However, it was shown that the tree structure in Forests can be replaced by even simpler structures, e.g., Random Naive Bayes classifiers, yielding similar performance. The goal of this paper is to benefit from these findings to develop an efficient on-line learner. Based on

Martin Godec; Christian Leistner; Amir Saffari; Horst Bischof

2010-01-01

234

A new on-line resource for psycholinguistic studies  

Microsoft Academic Search

Picture naming is a widely used technique in psycholinguistic studies. Here, we describe new on-line resources that our project has compiled and made available to researchers on the world wide web at http:\\/\\/crl.ucsd.edu\\/~aszekely\\/ipnp\\/. The website provides access to a wide range of picture stimuli and related norms in seven languages. Picture naming norms, including indices of name agreement and latency,

Anna Szekely; Thomas Jacobsen; Simona D'Amico; Antonella Devescovi; Elena Andonova; Daniel Herron; Ching Ching Lu; Thomas Pechmann; Csaba Pléh; Nicole Wicha; Kara Federmeier; Irina Gerdjikova; Gabriel Gutierrez; Daisy Hung; Jeanne Hsu; Gowri Iyer; Kathryn Kohnert; Teodora Mehotcheva; Araceli Orozco-Figueroa; Angela Tzeng; Ovid Tzeng; Anal??a Arévalo; Andras Vargha; Andrew C Butler; Robert Buffington; Elizabeth Bates

2004-01-01

235

Knowledge discovery from on-line cable condition monitoring systems  

Microsoft Academic Search

Detection and diagnosis of partial discharge (PD) activity has been widely adopted in electrical plant condition monitoring. For many years incipient partial discharge faults in power cables have been identified through off-line investigation techniques. With the development of measurement technology, more recently, continuous on-line monitoring systems are being installed, because in comparison with off-line measurement, it owns more advantages such

Xiaodi Song; Chengke Zhou; Donald M. Hepburn; Xiaosheng Peng

2010-01-01

236

Optical instrumentation for on-line analysis of chemical processes  

Microsoft Academic Search

Optical diagnostics provide the capability for nonintrusive, on-line, real time analysis of chemical process streams. Several laser-based methods for monitoring fossil energy processes have been evaluated. Among the instrumentation techniques which appear quite promising are coherent anti-Stokes Raman spectroscopy (CARS), laser-induced breakdown spectroscopy (LIBS), and synchronous detection of laser-induced fluorescence (SDLIF). A CARS diagnostic was implemented on a coal gasifier

A. Jr. Hartford; D. A. Cremers; T. R. Loree; G. P. Quigley

1983-01-01

237

On-line measurement of stack gas particulate radionuclides  

Microsoft Academic Search

Stack gases from nuclear facilities can contain both natural and man-made radionuclides. Interferences from natural radon daughters limit the detection capability of common radiation measurement methods. An improved system using on-line multichannel analyzers, alpha energy spectroscopy, gamma-ray analysis, radon-compensated gross beta counting, and automated data reduction is presented. This system provides accurate determination of certain stack effluent fine particulates as

F. S. Stong; G. L. Troyer; J. D. Jr. Criddle

1987-01-01

238

On-line metal cutting tool condition monitoring  

Microsoft Academic Search

This paper outlines a neural networks based modular tool condition monitoring system for cutting tool-state classification. Test cuts were conducted on EN24 alloy steel using P15 and P25 coated cemented carbide inserts and on-line cutting forces and vibration data acquired. Simultaneously the wear lengths on the cutting edges were measured, and these together with the processed data were fed to

D. E Dimla; P. M Lister

2000-01-01

239

Parallel on-line motion planning for industrial robots  

Microsoft Academic Search

This paper presents a new approach to parallel motion planning for industrial robot arms with six degrees of freedom in an on-line given 3D environment. The method is based on the A*-search algorithm and needs no essential off-line computations. The algorithm works in an implicitly descrete configuration space. Collisions are detected in the cartesian workspace by hierarchical distance computation based

C. Wurll; D. Henrich; H. Wörn

1998-01-01

240

An on-line tritium-in-water monitor  

Microsoft Academic Search

The paper describes the development and operation of a continuous on-line tritium-in-water monitor for the detection of heavy water leaks into the secondary coolant light water of a heavy water power reactor. The heart of the instrument is its plastic scintillator sponge detector, made from 5 mum thick plastic scintillator films. The sponge weighs only about 1 g and is

A. N. Singh; M. Ratnakaran; K. G. Vohra

1985-01-01

241

A reactor core on-line monitoring program - COMP  

SciTech Connect

A program named COMP is developed for on-line monitoring PWRs' in-core power distribution in this paper. Harmonics expansion method is used in COMP. The Unit 1 reactor of Daya Bay Nuclear Power Plant (Daya Bay NPP) in China is considered for verification. The numerical results show that the maximum relative error between measurement and reconstruction results from COMP is less than 5%, and the computing time is short, indicating that COMP is capable for online monitoring PWRs. (authors)

Wang, C. [State Nuclear Power Software Development Center, Beijing, 100029 (China); School of Nuclear Science and Technology, Xi'an Jiaotong Univ. (China); Building 1, Compound No.29, North Third Ring Road, Xicheng District, Beijing, 100029 (China); Wu, H.; Cao, L. [School of Nuclear Science and Technology, Xi'an Jiaotong Univ. (China)

2012-07-01

242

A novel tablet for on-line handwriting signal capture  

Microsoft Academic Search

At present, many kinds of handwriting-based applications have been developed. But up to now, all dynamic information describing writing process including forces, trajectories, velocities, accelerations and slants can't be acquired simultaneously by a single device. This paper introduces a new kind of tablet for on-line handwriting signal capture. With a special multi-dimension force\\/torque sensor, we can get the three perpendicular

Ping Fang; ZhongCheng Wu; Ming Meng; YunJian Gel; Yong Yu

2004-01-01

243

Smart Sketchpad - An On-line Graphics Recognition System  

Microsoft Academic Search

An on-line graphics recognition system is presented, which provides users a natural, convenient, and efficient way to input rigid and regular shapes or graphic objects (e.g., triangles, rectangles, ellipses, straight line, arrowheads, etc.) by quickly drawing their sketchy shapes in single or multiple strokes. An input sketchy (hand-drawn) shape is immediately converted into the user-intended rigid shape based on the

Liu Wenyin; Wenjie Qian; Rong Xiao; Xiangyu Jin

2001-01-01

244

On-line cursive handwriting recognition using speech recognition methods  

Microsoft Academic Search

A hidden Markov model (HMM) based continuous speech recognition system is applied to on-line cursive handwriting recognition. The base system is unmodified except for using handwriting feature vectors instead of speech. Due to inherent properties of HMMs, segmentation of the handwritten script sentences is unnecessary. A 1.1% word error rate is achieved for a 3050 word lexicon, 52 character, writer-dependent

T. Starner; John Makhoul; Richard Schwartz; George Chou

1994-01-01

245

A Search Engine Accepting On-Line Updates  

Microsoft Academic Search

Abstract. We describe and evaluate the performance of a parallel search engine that is able to cope efficiently with concurrent read\\/write oper- ations. Read operations come in the usual form of queries submitted to the search engine and write ones come in the form of new,documents added to the text collection in an on-line manner, namely the insertions are embedded,into

Mauricio Marín; Carolina Bonacic; Veronica Gil Costa; Carlos Gomez

2007-01-01

246

On-line fluorometric microbiological analysis for life support systems  

NASA Astrophysics Data System (ADS)

Fluorometric data, both spectral and time-resolved, are characterized by background luminescence and interfering, overlapping spectra from various living and nonliving fluorometric sources. Sophisticated pattern recognition techniques are used to identify and quantify microbial species of interest in the complex measurement environment. It is concluded that advanced pattern recognition methods based on neural networks supervised by genetic algorithms have been quite successful in identifying and quantifying bacteria and fungi in continuous on-line monitoring applications.

Schlager, Kenneth J.

1992-07-01

247

C++ Library for Accelerator Control and On-Line Modeling  

Microsoft Academic Search

A new object-oriented package has been developed at the SIBERIA SR source complex. This paper presents a formal approach to the interface between the control of a storage ring or transport line and beam modeling. A class library for on-line modeling is portable and uses the standard MAD input file interface for machine description. The object-oriented conception enables the realization

S. Kuznetsov

248

On-line nuclear orientation of As70  

Microsoft Academic Search

On line nuclear orientation was performed on As-70. Anisotropy data have been obtained at 8.7 mK for 29 gamma transitions. Multipole mixing ratios have been extracted for 17 transitions. Our results are in good agreement with existing data for the ten previously measured transitions. Our first time data for the 1496 keV, 2+ yields 2+ gamma ray suggest the 2526

J. K. Deng; J. H. Hamilton; A. V. Ramayya; W. C. Ma; X. W. Zhao; J. Kormicki; N. Severijns; L. Vanneste; W. D. Hamilton

1991-01-01

249

On-Line Electric Vehicle using inductive power transfer system  

Microsoft Academic Search

In this paper, 3 generations of OLEV (On-Line Electrical Vehicle) are introduced. The 1st generation of OLEV is conventional E-type structure. The air gap of the 1st generation is 1cm and the input to output power efficiency is 80% with 3 kW output power. The ultra slim U-type mono rail structure is applied to the 2nd generation of OLEV. This

Sungwoo Lee; Jin Huh; Nam-Sup Choi; Gyu-Hyeoung Cho; Chun-Taek Rim

2010-01-01

250

Glass integrated optical wavelength division multiplexing (WDM) devices: a comparison between experimental results and modeling by CAOS software  

NASA Astrophysics Data System (ADS)

A systematic study on integrated wavelength multi/demultiplexers is presented, in which the experimental features of the devices, the theoretical predictions of a simple model, and the results of extensive modelling by a BPM analysis are compared. The components are based on the two-mode interference principle, and are fabricated on soda-lime glass by Ag-Na ion exchange. The modelling is performed by CAOS, a user-friendly general purpose simulator, based on a FD scheme with transparent boundary conditions. The agreement between experimental and simulated spectral characteristics is very good; moreover the proposed analysis procedure allows the determination of the maximum index variation (Delta) n and the diffusion depth D which describe the optical and geometrical characteristics of the waveguides.

Perrone, Guido; Gulisano, A.; Petazzi, Diego; Macchia, L.; Montrosset, Ivo; Morasca, Salvatore; Pozzi, Fabio; de Bernardi, Carlo S.; Zaffiro, G.

1994-08-01

251

Magnetism without Magnetic Ions: Percolation, Exchange, and Formation Energies of Magnetism-Promoting Intrinsic Defects in CaO  

NASA Astrophysics Data System (ADS)

We investigate theoretically the prospects of ferromagnetism being induced by cation vacancies in nonmagnetic oxides. A single Ca vacancy VCa0 has a magnetic moment due to its open-shell structure but the ferromagnetic interaction between two vacancies extends only to four neighbors or less. To achieve magnetic percolation on a fcc lattice with such an interaction range one needs a minimum of 4.9% vacancies, or a concentration 1.8×1021cm-3. Total-energy calculations for CaO show, however, that due to the high vacancy formation energy even under the most favorable growth conditions one can not obtain more than 0.003% or 1018cm-3 vacancies at equilibrium, showing that a nonequilibrium vacancy-enhancement factor of 103 is needed to achieve magnetism in such systems.

Osorio-Guillén, J.; Lany, S.; Barabash, S. V.; Zunger, A.

2006-03-01

252

Multi-parameter on-line coal bulk analysis  

SciTech Connect

This was a four-year grant that was given a no cost extension for one more year. The purpose of the grant was to develop a pulsed neutron-based technique that could measure on-line all the major and minor elements in coal. Such measurements would allow the continuous monitoring of bulk parameters such as coal heating value (BTU/lb), volatile matter, moisture etc., deemed important to the coal industry. Such parameters, along with the continuous measurement of elements such as sulfur and sodium, are of major economic and environmental concern, and their measurement would assist in a more efficient use of the coal-fired boilers, as well as limiting emissions controlled by the 1990 Clean Air Act Amendments. It was hoped that this study would lead to the development of a technique able to create a marketable product, an On-Line Elemental Coal Analyzer. The study was separated in the following major parts: (1) Devise an efficient system for the detection of gamma rays; (2) Prior to experimentation, perform modeling and simulations for items such as detector shielding, coal sample configuration, and neutron tube collimation; (3) Develop a computer code for data reduction and analysis; (4) Measure the elemental composition of various coal samples; and (5) Design a prototype, on-line elemental coal analyzer, based on the PFTNA principle.

NONE

1999-02-01

253

Development of an On-Line Coal Washability Analyzer  

SciTech Connect

Washability analysis is the basis for nearly all coal preparation plant separations. Unfortunately, there are no on-line techniques for determining this most fundamental of all coal cleaning information. In light of recent successes at the University of Utah, it now appears possible to determine coal washability on-line through the use of x-ray computed tomography (CT) analysis. The successful development of such a device is critical to the establishment of process control and automated coal blending systems. In this regard, Virginia Tech, Terra Tek Inc., and Cyprus-Amax Coal Company have joined with the University of Utah and agreed to undertake the development of a x-ray CT-based on-line coal washability analyzer with financial assistance from DOE. The three-year project will cost $594,571, of which 33% ($194,575) will be cost-shared by the participants. The project will involve development of appropriate software and extensive testing/evaluation of well-characterized coal samples from three coal preparation plants. Each project participant brings special expertise to the project which is expected to create a new dimension in coal cleaning technology. Finally, it should be noted that the analyzer may prove to be a universal analyzer capable of providing not only washability analysis, but also particle size distribution analysis, ash analysis and perhaps pyritic sulfur analysis.

C. L. Lin; G. H. Luttrell; G. T. Adel; Jan D. Miller.

1998-03-31

254

Development of an On-Line Coal Washability Analyzer.  

SciTech Connect

Washability analysis is the basis for nearly all coal preparation plant separations. Unfortunately, there are no on-line techniques for determining this most fundamental of all coal cleaning information. In light of recent successes at the University of Utah, it now appears possible to determine coal washability on-line through the use of x-ray computed tomography (CT) analysis. The successful development of such a device is critical to the establishment of process control and automated coal blending systems. In this regard, Virginia Tech, Terra Tek Inc., and Cyprus-Amax Coal Company have joined with the University of Utah and agreed to undertake the development of an x-ray CT-based on-line coal washability analyzer with financial assistance from DOE. The three-year project will cost $594,571, of which 33% ($194,575) will be cost-shared by the participants. The project will involve development of appropriate software and extensive testing/evaluation of well-characterized coal samples from three coal preparation plants. Each project participant brings special expertise to the project which is expected to create a new dimension in coal cleaning technology. Finally, it should be noted that the analyzer may prove to be a universal analyzer capable of providing not only washability analysis, but also particle size distribution analysis, ash analysis and perhaps pyritic sulfur analysis.

Miller, Jan D.

1997-09-03

255

Review of trigger and on-line processors at SLAC  

SciTech Connect

The role of trigger and on-line processors in reducing data rates to manageable proportions in e/sup +/e/sup -/ physics experiments is defined not by high physics or background rates, but by the large event sizes of the general-purpose detectors employed. The rate of e/sup +/e/sup -/ annihilation is low, and backgrounds are not high; yet the number of physics processes which can be studied is vast and varied. This paper begins by briefly describing the role of trigger processors in the e/sup +/e/sup -/ context. The usual flow of the trigger decision process is illustrated with selected examples of SLAC trigger processing. The features are mentioned of triggering at the SLC and the trigger processing plans of the two SLC detectors: The Mark II and the SLD. The most common on-line processors at SLAC, the BADC, the SLAC Scanner Processor, the SLAC FASTBUS Controller, and the VAX CAMAC Channel, are discussed. Uses of the 168/E, 3081/E, and FASTBUS VAX processors are mentioned. The manner in which these processors are interfaced and the function they serve on line is described. Finally, the accelerator control system for the SLC is outlined. This paper is a survey in nature, and hence, relies heavily upon references to previous publications for detailed description of work mentioned here. 27 references, 9 figures, 1 table.

Lankford, A.J.

1984-07-01

256

DEVELOPMENT OF AN ON-LINE COAL WASHABILITY ANALYZER  

SciTech Connect

Washability analysis is the basis for nearly all coal preparation plant separations. Unfortunately, there are no on- line techniques for determining this most fundamental of all coal cleaning information. In light of recent successes at the University of Utah, it now appears possible to determine coal washability on-line through the use of x-ray computed tomography (CT) analysis. The successful development of such a device is critical to the establishment of process control and automated coal blending systems. In this regard, Virginia Tech, Terra Tek Inc., and U.S. coal producers have joined with the University of Utah and to undertake the development of an X-ray CT-based on- line coal washability analyzer with financial assistance from DOE. Each project participant brought special expertise to the project in order to create a new dimension in coal cleaning technology. The project involves development of appropriate software and extensive testing/evaluation of well-characterized coal samples from operating coal preparation plants. Data collected to date suggest that this new technology is capable of serving as a universal analyzer that can not only provide washability analysis, but also particle size distribution analysis, ash analysis, and perhaps pyritic sulfur analysis.

J.D. Miller; C.L. Lin; G.H. Luttrell; G.T. Adel; Barbara Marin

2001-06-26

257

Dry mechanochemical synthesis of hydroxyapatites from DCPD and CaO: influence of instrumental parameters on the reaction kinetics.  

PubMed

Mechanochemistry is a possible route to synthesize calcium deficient hydroxyapatite (CDHA) with an expected molar calcium-to-phosphate (Ca/P) ratio +/-0.01. To optimize the experimental conditions of CDHA preparation from dicalcium phosphate dihydrate (DCPD) and calcium oxide by dry mechanosynthesis reaction, we performed the kinetic study varying some experimental parameters. This kinetic study was carried out with two different planetary ball mills (Retsch or Fritsch Instuments). Results obtained with the two mills led to the same conclusions although the values of the rate constants of DCPD disappearance and times for complete reaction were very different. Certainly, the origin of these differences was from the mills used, thus we investigated the influence of instrumental parameters such as the mass and the surface area of the balls or the rotation velocity on the mechanochemical reaction kinetics of DCPD with CaO. Results show that the DCPD reaction rate constant and the inverse of the time for complete disappearance of CaO both vary linearly with (i) the square of the rotation velocity, (ii) the square of eccentricity of the vial on the rotating disc and (iii) the product of the mass by the surface area of the balls. These observations comply with theoretical models developed for mechanical alloying. The consideration of these four parameters allows the transposition of experimental conditions from one mill to another or the comparison between results obtained with different planetary ball mills. These instrumental parameters have to be well described in papers concerning mechanochemistry or when grinding is an important stage in a process. PMID:14643588

Mochales, Carolina; El Briak-BenAbdeslam, Hassane; Ginebra, Maria Pau; Terol, Alain; Planell, Josep A; Boudeville, Philippe

258

On-line Homework\\/Quiz\\/Exam applet: Freely available Java software for evaluating performance on line  

Microsoft Academic Search

The Homework\\/Quiz\\/Exam applet is a freely available Java program that can be used to evaluate student performance on line\\u000a for any content authored by a teacher. It has database connectivity so that student scores are automatically recorded. It\\u000a allows several different types of questions. Each question can be linked to images and detailed story problems. Three levels\\u000a of feedback are

Oakley E. Gordon; Thomas E. Malloy

2002-01-01

259

Use of solid-electrolyte galvanic cells to determine the activity of CaO in the CaO-ZrO{sub 2} system and the standard Gibbs free energies of formation of CaZrO{sub 3} from CaO and ZrO{sub 2}  

SciTech Connect

Ultraclean steel is deoxidized by the addition of aluminum, followed by desulfurizing and deoxidizing by the addition of calcium and zirconium. As a result of the deoxidation and desulfurization of molten steel, considerable oxide and sulfide inclusions are produced. The activity of CaO in the CaO-ZrO{sub 2} system has been measured at 1,572 to 1,877 K with a galvanic cell composed of 4CaO {center_dot} P{sub 2}O{sub 5} as the solid electrolyte. The activity ZrO{sub 2} was calculated from the activity of CaO by integrating the Gibbs-Duhem relation. From the activities of CaO and ZrO{sub 2}, the standard Gibbs free energy of formation of CaO {center_dot} ZrO{sub 2} was determined as follows: {Delta}G{sub f}{sup 0} = {minus}25,200 ({+-}150) {minus} 17.58 ({+-}0.085) T (1,633 to 1,873 K) J/mol.

Tanabe, Jun [Nippon Inst. of Tech., Saitama (Japan). Dept. of Mechanical Engineering; Nagata, Kazuhiro [Tokyo Inst. of Tech. (Japan). Dept. of Metallurgical Engineering

1996-08-01

260

In the Jungle of Astronomical On--line Data Services  

NASA Astrophysics Data System (ADS)

The author tried to survive in the jungle of astronomical on--line data services. In order to find efficient answers to common scientific data retrieval requests, he had to collect many pieces of information, in order to formulate typical user scenarios, and try them against a number of different data bases, catalogue services, or information systems. He discovered soon how frustrating treasure coffers may be when their keys are not available, but he realized also that nice widgets and gadgets are of no help when the information is not there. And, before long, he knew he would have to navigate through several systems because no one was yet offering a general answer to all his questions. I will present examples of common user scenarios and show how they were tested against a number of services. I will propose some elements of classification which should help the end-user to evaluate how adequate the different services may be for providing satisfying answers to specific queries. For that, many aspects of the user interaction will be considered: documentation, access, query formulation, functionalities, qualification of the data, overall efficiency, etc. I will also suggest possible improvements to the present situation: the first of them being to encourage system managers to increase collaboration between one another, for the benefit of the whole astronomical community. The subjective review I will present, is based on publicly available astronomical on--line services from the U.S. and from Europe, most of which (excepting the newcomers) were described in ``Databases and On-Line Data in Astronomy", (Albrecht & Egret, eds, 1991): this includes databases (such as NED and Simbad ), catalog services ( StarCat , DIRA , XCatScan , etc.), and information systems ( ADS and ESIS ).

Egret, D.

261

On-line composition with laser-based techniques  

SciTech Connect

Current methods for determining the composition of coal gasification streams generally involve sampling, some treatment, and inherent delay times prior to analysis. Optical instrumentation, on the other hand, provides the potential for on-line, rapid-response monitoring of gasifier streams. Among the optical technques that appear quite promising for this application are coherent anti-Stokes Raman scattering (CARS), laser-induced breakdown spectroscopy (LIBS), Fourier transform infrared spectroscopy (FTIR), laser-induced fluorescence (LIF), and synchronous detection of laser-induced fluorescence (SDLIF).

Finch, F.T.; Hartford, A. Jr.

1982-01-01

262

Cerritos College Earth Science On-Line Tutorial Center  

NSDL National Science Digital Library

This site feature on-line tutorials on a variety of topics including earth materials, earth processes, landform identification, topographic map reviews, earth science math review and more. Students are encouraged to review their textbooks and notes before beginning, but most tutorials offer a brief subject overview to supplement tasks such as vocabulary quizzes, visual identification, and multiple-choice or fill-in-the-blank exercises. Answers are provided so that students may asses their own progress. The site also offers links to other web-based tutorials, as well as lecture notes by Cerritos College Faculty on specific earth science topics.

College, Cerritos

263

Anisotropic. cap alpha. -emission of on-line separated isotopes  

SciTech Connect

The technical realization of particle detection at very low temperatures (4K) has made it possible to study for the first time the anisotropic ..cap alpha..-decay of oriented nuclei which have been produced, separated and implanted on line. The measured ..cap alpha..-angular distributions reveal surprising new results on nuclear aspects as well as in solid state physics. The nuclear structure information from these data questions the older ..cap alpha..-decay theoretical interpretation and urges for a reaxamination of the earliest work on anisotropic ..cap alpha..-decay.

Wouters, J.; Vandeplassche, D.; van Walle, E.; Severijns, N.; Van Haverbeke, J.; Vanneste, L.

1987-12-10

264

Gamma-resonance system on line with microcomputer  

SciTech Connect

This paper describes a system that consists of a modernized YaGRS-4M spectrometer interfaced with an Elektronika-60 microcomputer, which operates as a terminal for SM-4 and Elektronika-100I minicomputers. It is shown that organization of storage and real-time display of Mossbauer spectra by direct memory access, which completely eliminates losses d of physical data, frees the processor of the microcomputer for solution of problems that put an experiment on-line. The advantages of a multi-level system for automation of gamma-resonance experiments are discussed.

Bil'dyukevich, E.V.; Gurachevskii, V.L; Litvinovich, Y.A.; Mashlan, M.; Misevich, O.V.

1986-05-01

265

Integrated on-line accelerator modeling at CEBAF  

SciTech Connect

An on-line accelerator modeling facility is currently under development at CEBAF. The model server, which is integrated with the EPICS control system, provides coupled and 2nd-order matrices for the entire accelerator, and forms the foundation for automated model- based control and diagnostic applications. Four types of machine models are provided, including design, golden or certified, live, and scratch or simulated model. Provisions are also made for the use of multiple lattice modeling programs such as DIMAD, PARMELA, and TLIE. Design and implementation details are discussed. 2 refs., 4 figs.

Bowling, B.A.; Shoaee, H.; Van Zeijts, J.; Witherspoon, S.; Watson, W.

1995-12-31

266

Source reduction from chemical plants using on-line optimization  

SciTech Connect

An effective approach for source reduction in chemical plants has been demonstrated using on-line optimization with flowsheeting (ASPEN PLUS) for process optimization and parameter estimation and the Tjao-Biegler algorithm implemented in a mathematical programming language (GAMS/MINOS) for data reconciliation and gross error detection. Results for a Monsanto sulfuric acid plant with a Bailey distributed control system showed a 25% reduction in the sulfur dioxide emissions and a 17% improvement in the profit over the current operating conditions. Details of the methods used are described.

Zhang, Z.; Pike, R.W. [Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Chemical Engineering; Hertwig, T.A. [IMC-Agrico Corp., Uncle Sam, LA (United States)

1995-12-01

267

Evaluating on-line continuing education for nurses.  

PubMed

The rapid increase in web sites for nursing continuing education demands critical appraisal by the user. The level of anonymity of the web site authors and sponsors may lead to a laxity of accountability found in no other media. This article discusses criteria for web site evaluation and provides a rating instrument to assist learners in determining the quality and usability of an on-line nursing continuing education offering. Using the rating instrument, two web sites are reviewed. A list of selected nursing continuing education web sites is included. PMID:12004521

Huckstadt, A; Hayes, K

2000-01-01

268

On-line RVP analysis improves gas blending  

SciTech Connect

New government regulations on gasoline quality are making gasoline blending an increasingly important aspect of refining. The Environmental Protection Agency volatility regulations that establish maximum summertime commercial gasoline volatility levels provide that gasoline Reid Vapor Pressor starting in 1989 may not exceed 10.5, or 9.0 psi. Additionally, beginning in 1992, it may not exceed either 9.0 or 7.8 psi, depending on the area of the country and the month. This article discusses the on-line analysis of gas blending to minimize the volatile organic compounds released to the air.

Lo, P.T. [BP Oil Alliance Refinery, Belle Chasse, LA (United States)

1994-09-01

269

TELCAL: The On-line Calibration Software for ALMA  

NASA Astrophysics Data System (ADS)

The ALMA on-line calibration regroups all the operations needed to maintain the ALMA interferometer optimally tuned to successfully execute the planned observations. The results of the calibrations are used in quasi-real time by the ALMA Control System. Since the first ALMA antennas were put into operation in 2009, TELCAL has been used for all the basic calibration operations and is still being improved following the project advancement. We describe here the calibrations done by TELCAL, its relationships with the other ALMA software subsystems and, briefly, the architecture of the software based on CORBA.

Broguière, D.; Lucas, R.; Pardo, J.; Roche, J.-C.

2011-07-01

270

Anisotropic alpha emission from on-line separated isotopes  

SciTech Connect

A systematic on-line nuclear-orientation study of heavy isotopes using anisotropic ..cap alpha.. emission is reported for the first time. The anisotrophies recorded for /sup 199/At, /sup 201/At, and /sup 203/At are remarkably pronounced and strongly varying. At lower neutron number the ..cap alpha.. particles are more preferentially emitted perpendicularly to the nuclear-spin direction. This may be interpreted in terms of the high sensitivity of the ..cap alpha..-emission probability to changes in the nuclear shape.

Wouters, J.; Vandeplassche, D.; van Walle, E.; Severijns, N.; Vanneste, L.

1986-05-05

271

On-line social interactions and executive functions.  

PubMed

A successful social interaction often requires on-line and active construction of an ever-changing mental-model of another person's beliefs, expectations, emotions, and desires. It also requires the ability to maintain focus, problem-solve, and flexibly pursue goals in a distraction-rich environment, as well as the ability to take-turns and inhibit inappropriate behaviors. Many of these tasks rely on executive functions (EF) - working memory, attention/cognitive control, and inhibition. Executive functioning has long been viewed as relatively static. However, starting with recent reports of successful cognitive interventions, this view is changing and now EFs are seen as much more open to both short- and long-term "training," "warm-up," and "exhaustion" effects. Some of the most intriguing evidence suggests that engaging in social interaction enhances performance on standard EF tests. Interestingly, the latest research indicates these EF benefits are selectively conferred by certain on-line, dynamic social interactions, which require participants to mentally engage with another person and actively construct a model of their mind. We review this literature and highlight its connection with evolutionary and cultural theories emphasizing links between intelligence and sociality. PMID:22509160

Ybarra, Oscar; Winkielman, Piotr

2012-04-09

272

LEP accelerator logging system using on-line database  

NASA Astrophysics Data System (ADS)

The performance and efficiency of LEP depend on a multitude of factors, including particle beam characteristics, physics parameters, hardware settings, and environmental conditions. Often, these factors interact in unexpected ways and affect the machine performance. In January 1992, a project was started to create a unique logging system using an on-line database. One year's worth of data was to be kept on-line, which was estimated to be a total of 8 GByte. The systems concerned are of different nature (particle beam profile, power converter current, meteorological data, magnet temperature, lep-mode, ...), require sampling at different frequencies (from seconds to several hours) and are of different sample size (from 10 MByte to 1 GByte per year). Major performance criteria included rapid logging of data for useful real-time monitoring of compound measurements, and rapid retrieval and correlation of large amounts of data for efficient off-line analysis. For the database design the NIAM methodology was used as well as some interesting techniques such as tagging the rows with timeslots instead of timestamps and row packing for storage minimisation. A complex structure of servers and clients takes care of data gathering, data logging and management of all real time measurement and logging requests. Several tools have been developed to make the data correlation transparent to non-database experts.

Billen, R.; Bordry, F.; Delamare, C.; Hatziangeli, E.; Roeber, F.

1994-12-01

273

On-line social interactions and executive functions  

PubMed Central

A successful social interaction often requires on-line and active construction of an ever-changing mental-model of another person’s beliefs, expectations, emotions, and desires. It also requires the ability to maintain focus, problem-solve, and flexibly pursue goals in a distraction-rich environment, as well as the ability to take-turns and inhibit inappropriate behaviors. Many of these tasks rely on executive functions (EF) – working memory, attention/cognitive control, and inhibition. Executive functioning has long been viewed as relatively static. However, starting with recent reports of successful cognitive interventions, this view is changing and now EFs are seen as much more open to both short- and long-term “training,” “warm-up,” and “exhaustion” effects. Some of the most intriguing evidence suggests that engaging in social interaction enhances performance on standard EF tests. Interestingly, the latest research indicates these EF benefits are selectively conferred by certain on-line, dynamic social interactions, which require participants to mentally engage with another person and actively construct a model of their mind. We review this literature and highlight its connection with evolutionary and cultural theories emphasizing links between intelligence and sociality.

Ybarra, Oscar; Winkielman, Piotr

2012-01-01

274

On-line inverse multiple instance boosting for classifier grids  

PubMed Central

Classifier grids have shown to be a considerable choice for object detection from static cameras. By applying a single classifier per image location the classifier’s complexity can be reduced and more specific and thus more accurate classifiers can be estimated. In addition, by using an on-line learner a highly adaptive but stable detection system can be obtained. Even though long-term stability has been demonstrated such systems still suffer from short-term drifting if an object is not moving over a long period of time. The goal of this work is to overcome this problem and thus to increase the recall while preserving the accuracy. In particular, we adapt ideas from multiple instance learning (MIL) for on-line boosting. In contrast to standard MIL approaches, which assume an ambiguity on the positive samples, we apply this concept to the negative samples: inverse multiple instance learning. By introducing temporal bags consisting of background images operating on different time scales, we can ensure that each bag contains at least one sample having a negative label, providing the theoretical requirements. The experimental results demonstrate superior classification results in presence of non-moving objects.

Sternig, Sabine; Roth, Peter M.; Bischof, Horst

2012-01-01

275

On-line estimation of concentration parameters in fermentation processes*  

PubMed Central

It has long been thought that bioprocess, with their inherent measurement difficulties and complex dynamics, posed almost insurmountable problems to engineers. A novel software sensor is proposed to make more effective use of those measurements that are already available, which enable improvement in fermentation process control. The proposed method is based on mixtures of Gaussian processes (GP) with expectation maximization (EM) algorithm employed for parameter estimation of mixture of models. The mixture model can alleviate computational complexity of GP and also accord with changes of operating condition in fermentation processes, i.e., it would certainly be able to examine what types of process-knowledge would be most relevant for local models’ specific operating points of the process and then combine them into a global one. Demonstrated by on-line estimate of yeast concentration in fermentation industry as an example, it is shown that soft sensor based state estimation is a powerful technique for both enhancing automatic control performance of biological systems and implementing on-line monitoring and optimization.

Xiong, Zhi-hua; Huang, Guo-hong; Shao, Hui-he

2005-01-01

276

Selective catalytic reduction of nitric oxide by methane in the presence of oxygen over CaO catalyst  

SciTech Connect

The selective catalytic reduction of nitric oxide by methane in the presence of oxygen was studied over CaO catalyst in the temperature range 550--850 C. The nitric oxide conversion-versus-temperature profile was found to depend on oxygen feed concentration, while the selectivity to N{sub 2} formation was found to be 100% and independent of oxygen feed concentration in the range 1--10 mol%. The kinetic study has shown that the reaction order with respect to NO and CH{sub 4} is 1.0 and 0.5, respectively. On the other hand, the reaction order with respect to O{sub 2} was found to be slightly positive for O{sub 2} feed concentrations up to 1 mol% and slightly negative at higher concentrations. The apparent activation energy of the reaction in the presence of oxygen was found to be 14.6 kcal/mol. The addition of 2.5 mol% CO{sub 2} and 5 mol% H{sub 2}O in the feed stream had a considerable inhibiting effect on NO conversion in the range 550--650 C, while a small inhibiting effect of CO{sub 2} and a positive effect of H{sub 2}O were observed in the range 700--850 C. Temperature-programmed desorption (TPD) of NO revealed the presence of two well-resolved NO peaks in the temperature range 250--650 C, a behavior also observed during a temperature-programmed oxidation experiment under O{sub 2}/He flow. However, during temperature-programmed surface reaction under CH{sub 4}/He flow the NO desorption spectrum showed a significant shift of the stronger adsorbed NO species toward lower temperatures. Preadsorbed CO{sub 2} on the CaO surface was found to largely affect the chemisorption of NO and its desorption kinetics during TPD. The amount of deposited carbon-containing species on the catalyst surface during reaction was determined with transient titration experiments and it was found to be small.

Fliatoura, K.D.; Verykios, X.E. [Univ. of Patras (Greece). Dept. of Chemical Engineering; Costa, C.N.; Efstathiou, A.M. [Univ. of Cyprus, Nicosia (Cyprus). Dept. of Natural Sciences

1999-04-25

277

Multiresidue herbicide analysis in soil:? subcritical water extraction with an on-line sorbent trap.  

PubMed

We evaluated the feasibility of extracting selectively and rapidly herbicide residues in soils by hot water and collecting analytes with a Carbograph 4 solid-phase extraction (SPE) cartridge set on-line with the extraction cell. Phenoxy acid herbicides and those nonacidic and acidic herbicides which are often used in combination with phenoxy acids were selected for this study. Five different soil samples were fortified with target compounds at levels of 100 and 10 ng/g (30 ng/g of clopyralid and picloram) by following a procedure able to mimic weathered soils. Herbicides were extracted with water at 90 °C and collected on-line by the SPE cartridge. After the cartridge was disconnected from the extraction apparatus, analytes were recovered by stepwise elution to separate nonacidic herbicides from acidic ones. The two final extracts were analyzed by liquid chromatography/mass spectrometry with an electrospray ion source. At the lowest spike level considered, analyte recoveries ranged between 81 and 93%, except those for 2,4-DB and MCPB, which were 63%. For 16 herbicides out of 18, the ANOVA test showed recoveries were not dependent on the type of soil. The method detection limit was in the 1.7-10 ng/g range. For the analytes considered, method comparison showed this extraction method was overall more efficient than Soxhlet and sonication extraction techniques. PMID:21662752

Crescenzi, C; D'Ascenzo, G; Di Corcia, A; Nazzari, M; Marchese, S; Samperi, R

1999-06-01

278

On-line activity screening for radical scavengers from Baccharis chilco.  

PubMed

Baccharis plants have been used since ancient times in American traditional medicine. Baccharis chilco is a perennial shrub of temperate regions of South America that grows well in rainfall forests of Colombia. Neither chemical composition nor biological studies of this plant have ever been reported. Two caffeoylquinic acid (CQA) derivatives, 5-O-[(E)-caffeoyl]quinic acid (1) and 3,5-di-O-[(E)-caffeoyl]quinic acid (3), and rosmarinic acid (2) have been isolated from B. chilco growing wild in Colombia, using the on-line HPLC-DAD-DPPH radical-scavenging detection technique as guidance. In the course of the purification work, L-chiro-inositol (4) was also isolated. Structures of the four isolated compounds were determined by spectroscopic methods. Antioxidants 2 and 3 exhibited high antiradical activities evaluated by the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH(.)) assay, although somewhat lower than that of the reference compound ascorbic acid. The on-line HPLC-DAD-DPPH technique allowed a rapid pinpointing of antioxidants in the studied EtOH extract, and the facile guided isolation of the target molecules. PMID:23418166

Argoti, Juan C; Linares-Palomino, Pablo J; Salido, Sofía; Ramírez, Bernardo; Insuasty, Braulio; Altarejos, Joaquín

2013-02-01

279

The effect of on-line position correction on the dose distribution in focal radiotherapy for bladder cancer  

PubMed Central

Background The purpose of this study was to determine the dosimetric effect of on-line position correction for bladder tumor irradiation and to find methods to predict and handle this effect. Methods For 25 patients with unifocal bladder cancer intensity modulated radiotherapy (IMRT) with 5 beams was planned. The requirement for each plan was that 99% of the target volume received 95% of the prescribed dose. Tumor displacements from -2.0 cm to 2.0 cm in each dimension were simulated, using 0.5 cm increments, resulting in 729 simulations per patient. We assumed that on-line correction for the tumor was applied perfectly. We determined the correlation between the change in D99% and the change in path length, which is defined here as the distance from the skin to the isocenter for each beam. In addition the margin needed to avoid underdosage was determined and the probability that an underdosage occurs in a real treatment was calculated. Results Adjustments for tumor displacement with perfect on-line position correction resulted in an altered dose distribution. The altered fraction dose to the target varied from 91.9% to 100.4% of the prescribed dose. The mean D99% (± SD) was 95.8% ± 1.0%. There was a modest linear correlation between the difference in D99% and the change in path length of the beams after correction (R2 = 0.590). The median probability that a systematic underdosage occurs in a real treatment was 0.23% (range: 0 - 24.5%). A margin of 2 mm reduced that probability to < 0.001% in all patients. Conclusion On-line position correction does result in an altered target coverage, due to changes in average path length after position correction. An extra margin can be added to prevent underdosage.

van Rooijen, Dominique C; van de Kamer, Jeroen B; Pool, Rene; Hulshof, Maarten CCM; Koning, Caro CE; Bel, Arjan

2009-01-01

280

On-line collection and transfer of radioactive noble gas isotopes for radon EDM measurements  

NASA Astrophysics Data System (ADS)

An apparatus has been developed for on--line collection and transfer to a measurement cell of radon isotopes for optical pumping studies and electric dipole moment (EDM) measurements. Specific isotopes are predicted to have large atomic EDMs due to nuclear octupole deformation or vibration resulting in enhanced sensitivity to CP violation. A low energy isotope separator beam is stopped in a foil. After collection, the foil is heated and the noble gas atoms are cryopumped to a cold finger and then transferred with a buffer gas to a measurement cell. The apparatus has been tested with ^120Xe produced from a ^120Cs beam at the TRIUMF ISAC facility, and greater than 40% efficiency for transfer from the foil to the cell has been demonstrated. The apparatus may also be useful for other measurements with gaseous targets including laser spectroscopy and precision half--life measurements.

Nuss-Warren, Sarah; Tardiff, Eric; Warner, Tim; Ball, Gordon; Behr, John; Chupp, Tim; Coulter, Kevin; Hackman, Greg; Hayden, Michael; Pearson, Matthew; Phillips, Andrew; Smith, Martin; Svensson, Carl

2004-05-01

281

Linking From the ADS to Other On-line Resources  

NASA Astrophysics Data System (ADS)

The NASA Astrophysics Data System (ADS) currently provides free access to over 2.7 million records in four bibliographic databases through a sophisticated search interface. In addition to the basic metadata about a published paper, the ADS provides links to any relevant on-line resources, including full-text articles and published data tables. Similarly, an increasingly larger number of publishers and institutions are using the ADS to verify the existence and availability of references published in the scientific literature. To facilitate the exchange of metadata necessary to establish these links, the ADS is developing prototype Web Services based on emerging industry standards such as SOAP and WSDL as part of a collaboration with the major NASA Astrophysics Data centers. This collaboration is expanding the scope of the linking to and from the ADS considerably. The ADS is funded by NASA Grant NCC5-189

Eichhorn, G.; Accomazzi, A.; Grant, C. S.; Kurtz, M. J.; Murray, S. S.

2002-12-01

282

Two-year-olds compute syntactic structure on-line.  

PubMed

Syntax allows human beings to build an infinite number of new sentences from a finite stock of words. Because toddlers typically utter only one or two words at a time, they have been thought to have no syntax. Using event-related potentials (ERPs), we demonstrated that 2-year-olds do compute syntactic structure when listening to spoken sentences. We observed an early left-lateralized brain response when an expected verb was incorrectly replaced by a noun (or vice versa). Thus, toddlers build on-line expectations as to the syntactic category of the next word in a sentence. In addition, the response topography was different for nouns and verbs, suggesting that different neural networks already underlie noun and verb processing in toddlers, as they do in adults. PMID:20121864

Bernal, Savita; Dehaene-Lambertz, Ghislaine; Millotte, Séverine; Christophe, Anne

2010-01-01

283

Comprehension aids for on-line reading of expository text.  

PubMed

A chapter of expository text was presented on a CRT with optional "windowing" of definitions of selected words varying in relevance to each screen's main ideas. A test treatment was interposed to influence reading strategies. Dependent variables included text reading time, frequency of definition "calls," definition reading rates, and scores on a final comprehension test. Results indicate that a technical chapter can be read from a CRT with appreciable content retention. Subjects accessed 80% of available definitions, but those able to "call" content-relevant definitions increased their frequency of definition "calls." Definition reading rate diminished; comprehension and processing time increased only for subjects accessing the theoretically relevant definitions. The results suggest how the use of definitions enhances the comprehension of on-line training manuals, texts, and help screens. "Callable" definitions need not include all low-frequency technical concepts but only those relevant to reductive main ideas. PMID:2707814

Lachman, R

1989-02-01

284

Bamberg Observatory Plate Surveys: Digitization and On-Line Access  

NASA Astrophysics Data System (ADS)

The results from five-year work on the Bamberg Observatory plate collection from inventory to digitization are presented. The project supported by the Alexander von Humboldt Foundation, Deutsche Forschung Gemeinschaft, and Bulgarian Academy of Sciences has begun since 2002. At present the information for about 28 000 plates from the Bamberg Southern and Northern surveys is accessible on-line from WFPDB (http://www.skyarchive.org). More than 700 plates are digitized with the professional flatbed scanner EPSON 1640XL. Two more tasks complete the overall project: digitization of the entire plate collection, started with some pilot fields as LMC/SMC, the Pleiades, etc. and linking the digitized information to German Astronomical Virtual Observatory (GAVO) and European Virtual Observatory. Some successful examples of using the Bamberg plate collection to study long-term variability of chromospherically active stars are present.

Tsvetkov, Milcho; Heber, Ulrich; Tsvetkova, Katya; Borisova, Ana; Kalaglarsky, Damyan; Bogdanovski, Rumen; Drechsel, Horst; Wilms, Joern

2007-08-01

285

Holographic digital microscopy in on-line process control  

NASA Astrophysics Data System (ADS)

This article investigates the feasibility of real-time three-dimensional imaging of microscopic objects within various emulsions while being produced in specialized production vessels. The study is particularly relevant to on-line process monitoring and control in chemical, pharmaceutical, food, cleaning, and personal hygiene industries. Such processes are often dynamic and the materials cannot be measured once removed from the production vessel. The technique reported here is applicable to three-dimensional characterization analyses on stirred fluids in small reaction vessels. Relatively expensive pulsed lasers have been avoided through the careful control of the speed of the moving fluid in relation to the speed of the camera exposure and the wavelength of the continuous wave laser used. The ultimate aim of the project is to introduce a fully robust and compact digital holographic microscope as a process control tool in a full size specialized production vessel.

Osanlou, Ardeshir

2011-09-01

286

Schools of California On-line Resources for Education  

NSDL National Science Digital Library

Schools of California On-line Resources for Education (SCORE) provides a library of online resources for education that are aligned to California State educational standards. The library is searchable by grade level, subject, and keyword or term. A separate search is provided for lesson plans and activities; this mode also allows for searching by standards (grade level, subject area, and standard number). The standards page provides links to the text of California State science content standards, by grade, and National Science Education Standards. There are also pages of student- and teacher-specific resources, an ask-a-scientist feature, and links to state and national networking sites which provide information about science organizations, conferences or email discussions with other teachers or students.

287

On-line learning in soft committee machines  

NASA Astrophysics Data System (ADS)

The problem of on-line learning in two-layer neural networks is studied within the framework of statistical mechanics. A fully connected committee machine with K hidden units is trained by gradient descent to perform a task defined by a teacher committee machine with M hidden units acting on randomly drawn inputs. The approach, based on a direct averaging over the activation of the hidden units, results in a set of first-order differential equations that describes the dynamical evolution of the overlaps among the various hidden units and allows for a computation of the generalization error. The equations of motion are obtained analytically for general K and M and provide a powerful tool used here to study a variety of realizable, over-realizable, and unrealizable learning scenarios and to analyze the role of the learning rate in controlling the evolution and convergence of the learning process.

Saad, David; Solla, Sara A.

1995-10-01

288

On-line monitoring of volatile organic species  

SciTech Connect

On-line chemical monitoring systems can help ensure safe, environmentally sound operation of industrial processes using hazardous chemicals. Using polymer-coated surface acoustic wave (SAW) sensors, we have demonstrated monitors that are capable of detecting dilute concentrations of volatile organic species. Using changes in both wave velocity and wave attenuation, the identity and concentration of an isolated chemical species can be determined. A polysiloxane coating has been found to provide unique properties for monitoring chlorinated hydrocarbons (CHCs) such as trichloroethylene: good discrimination of CHCs from most other organic species, rapid and reversible sensor response, and low detection limits. Using this technology, a portable acoustic wave sensor (PAWS) system has been constructed. 7 refs., 4 figs.

Frye, G.C.; Martin, S.J.

1990-01-01

289

A versatile apparatus for on-line emission channeling experiments.  

PubMed

The concept and functionality of an apparatus dedicated to emission channeling experiments using short-lived isotopes on-line at ISOLDE?CERN is described. The setup is assembled in two functional blocks - (a) base stand including beam collimation, implantation and measurement chamber, cryogenic extension, and vacuum control system and (b) Panmure goniometer extension including maneuvering cradle and sample heating furnace. This setup allows for in situ implantation and sample analysis in the as-implanted state and upon cooling down to 50 K and during annealing up to 1200 K. The functionality of the setup will be illustrated with the example of establishing the lattice location of (56)Mn probes implanted into GaAs. PMID:23902062

Silva, M R; Wahl, U; Correia, J G; Amorim, L M; Pereira, L M C

2013-07-01

290

Children's on-line processing of scrambling in Japanese.  

PubMed

This study investigates the on-line processing of scrambled sentences in Japanese by preschool children and adults using a combination of self-paced listening and speeded picture selection tasks. The effects of a filler-gap dependency, reversibility, and case markers were examined. The results show that both children and adults had difficulty in comprehending scrambled sentences when they were provided as reversible sentences. The reversibility effect was significant for children, whereas the interaction of reversibility and a filler-gap dependency was significant for adults. However, this does not indicate that children's parsing is fundamentally different from that of adults. For those children who processed the nominative and accusative case markers equally fast, the reactivation of the dislocated constituent was observed in the gap position. These results suggest that children's processing is basically the same as adults' in that their sentence processing is incremental and they parse a gap to form a filler-gap dependency. PMID:22460686

Suzuki, Takaaki

2013-04-01

291

Association of Teachers of Mathematics: Resources OnLine  

NSDL National Science Digital Library

The Association of Teachers of Mathematics (ATM), based in the United Kingdom, "believes in providing teachers with the resources to help them develop their mathematics teaching in creative and broad-thinking ways." This section on Resources OnLine offers a variety of resources, some of which are available only by purchase online. Some of the free online resources include sample files and programs from ATM CDs on spreadsheets and Interactive Mathematics, as well as some games involving shapes and probability. Films available in Macromedia Flash Player format demonstrate topics such as Polygons, Exploring Halves, Tangrams, and Euclid's Pythagoras Proof. A link to ATM's Convex Polyhedra Website shows 50 of the convex polyhedra that can be made with regular polygons and groups them into 10 families and some suggested activities to try using the images. Some articles from ATM Journals are also available online.

292

Human basal ganglia and the dynamic control of force during on-line corrections.  

PubMed

Natural movements are corrected in part by the generation of submovements, occurring early in a movement such that they amend an ongoing action. Submovements are associated with activity of the basal ganglia, implying a role for the structures in error correction. In parallel, the basal ganglia are linked to the generation and control of force amplitude, change, and duration. Here, we tested whether activity in human basal ganglia is associated with submovements generally, or was specific to a condition where the submovements only occurred in the face of unexpected proprioceptive error. Submovements were induced by introducing unexpected and variable viscous loads (augmenting the need for trial-specific grip forces) or by reducing target size (augmenting the need for visually guided on-line control) in a one-dimensional target-capture task. In both cases, subjects compensated for the increased task difficulty by generating corrective submovements, which were closely matched in frequency and type. Activity in the internal segment of the globus pallidus and subthalamic nucleus correlated strongly with the number of submovements during the viscous challenge but not with the target challenge. The effects could not be explained by kinematic differences, i.e., movement amplitude or average number of submovements. The results support a specific role for the basal ganglia in error correction under conditions of variable load where there is a need for the dynamic control of force within an ongoing movement. PMID:21289168

Grafton, Scott T; Tunik, Eugene

2011-02-01

293

Chemical and morphological consequences of acidification of pure, phosphated, and phosphonated CaO: influence of CO2 adsorption.  

PubMed

In situ Fourier transform infrared (FTIR) spectroscopy was employed to characterize the adsorption behavior (as a function of pressure or time) and surface species of CO2 molecules on pure, phosphated, and phosphonated CaO. Carbonate and bicarbonate species were found to form on the pure oxide, whereas on the phosphated and phosphonated oxide samples the carbonate species were found to substitute favorably some of the OH(-) and PO4(3-) groups thereon exposed, respectively. Before and after carbonation, the test samples were further examined by in situ FTIR spectroscopy of adsorbed pyridine species, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Then they were in situ acidified by exposure to a wet atmosphere of HCl vapor at 673 K for 10 min and re-examined similarly to reveal the influence of CO2 adsorption on the chemical and morphological consequences of acidification. The results obtained show the carbonate substitution of PO4(3-) groups to enhance agglomeration of the otherwise fine, longitudinal material particles into much bulkier ones and to render the otherwise more stable phosphonate groups less stable to acid treatment than the phosphate groups. Moreover, the bulky particle agglomerates of the carbonated test samples were detectably eroded following the acid treatment. PMID:18512873

Zaki, Mohamed I; Knözinger, Helmut; Tesche, Bernd; Mekhemer, Gamal A H; Bongard, Hans-Josef

2008-05-30

294

Spectroscopic characterization of a multiband complex oxide: Insulating and conducting cement 12CaO·7Al2O3  

NASA Astrophysics Data System (ADS)

Natural 12CaO·7Al2O3 (C12A7) is a wide band gap insulator, but conductivity can be realized by introducing oxygen deficiency. Currently, there are two competing models explaining conductivity in oxygen-deficient C12A7, one involving the electron transfer via a “cage conduction band” inside the nominal band gap, the other involving electron hopping along framework lattice sites. To help resolve this debate, we probe insulating and conducting C12A7 with x-ray emission, x-ray absorption, and x-ray photoemission spectroscopy, which provide a full picture of both the valence and conduction band edges in these materials. These measurements suggest the existence of a narrow conduction band between the main conduction and valence bands common in both conducting and insulating C12A7 and support the theory that free electrons in oxygen-deficient C12A7 occupy the low-energy states of this narrow band. Our measurements are corroborated with density functional theory calculations.

McLeod, J. A.; Buling, A.; Kurmaev, E. Z.; Sushko, P. V.; Neumann, M.; Finkelstein, L. D.; Kim, S.-W.; Hosono, H.; Moewes, A.

2012-01-01

295

Strong enhancement of superconductivity in inorganic electride 12CaO·7Al2O3:e- under high pressure  

NASA Astrophysics Data System (ADS)

We present the results of the pressure dependence of the superconductivity of the inorganic electride 12CaO·7Al2O3:e- (C12A7:e-) single crystal through the ac-susceptibility measurement under high pressure. C12A7:e- has the cage structure and the density of states derived from the cages may play an important role in the superconductivity. The superconducting transition temperature ( T c) is ˜ 0.2 K at ambient pressure and monotonically increases up to 1.79 K at 4.7 GPa. The upper critical field H c2 and - dH c2/ dT at T c, in proportion to the density of states (DOS) at Fermi energy becomes larger under high pressure. The superconductivity in C12A7:e- is mediated by the electron-phonon interaction, and the increase of Tc with pressure may arise from a peak structure of the DOS of cage conduction band.

Tanaka, Shigeki; Kato, Tomoki; Miyake, Atsushi; Kagayama, Tomoko; Shimizu, Katsuya; Kim, Sung Wng; Matsuishi, Satoru; Hosono, Hideo

2013-08-01

296

Spectroscopic Characterization of a Multiband Complex Oxide: Insulating and Conducting Cement 12CaO·7Al?O?  

SciTech Connect

Natural 12CaO·7Al?O? (C12A7) is a wide band gap insulator, but conductivity can be realized by introducing oxygen deficiency. Currently, there are two competing models explaining conductivity in oxygen-deficient C12A7, one involving the electron transfer via a “cage conduction band” inside the nominal band gap, the other involving electron hopping along framework lattice sites. To help resolve this debate, we probe insulating and conducting C12A7 with x-ray emission, x-ray absorption, and x-ray photoemission spectroscopy, which provide a full picture of both the valence and conduction band edges in these materials. Thesemeasurements suggest the existence of a narrow conduction band between themain conduction and valence bands common in both conducting and insulating C12A7 and support the theory that free electrons in oxygen-deficient C12A7 occupy the low-energy states of this narrow band. Our measurements are corroborated with density functional theory calculations.

McLeod, John A.; Buling, A.; Kurmaev, Ernst Z.; Sushko, Petr V.; Neumann, N.; Finkelstein, L. D.; Kim, S. W.; Hosono, H.; Moewes, Alexander

2012-01-13

297

Development of on-line measurement system of bulk density based on on-line measured draught, depth and soil moisture content  

Microsoft Academic Search

On-line measurement of soil compaction is needed for site specific tillage management. The soil bulk density (?) indicating soil compaction was measured on-line by means of a developed compaction sensor system that comprised several sensors for on-line measurement of the draught (D) of a soil cutting tool (subsoiler), the soil cutting depth (d) and the soil moisture content (w). The

Abdul Mounem Mouazen; Herman Ramon

2006-01-01

298

Calciothermic reduction of TiO2 and in situ electrolysis of CaO in the molten CaCl2  

NASA Astrophysics Data System (ADS)

A new cell concept for calciothermic reduction is presented where TiO2 is used as the raw material for reduction. The reduction system consists of a single cell, where both the reduction reaction and the electrolytic reaction for recovery of reducing agent coexist in the same molten CaCl2 bath. TiO2 powder reacts with a few mol%Ca dissolved in the melt. Sufficiently deoxidized titanium metal was obtained at the bottom of the cell. Because the molten CaCl2 has a large solubility for CaO, both mechanisms of the halide flux deoxidation and the electrochemical deoxidation work efficiently once the metallic Ti was precipitated. The reducing agent is in situ recovered by electrolysis of CaO as, Attheanode:C+2O=CO+4e Atthecathode:Ca+2e=Ca. Some experimental results are presented for confirmation of this proposal and mechanism.

Suzuki, Ryosuke O.

2005-02-01

299

Comparison of phosgene, chlorine, and hydrogen chloride as reagents for converting molten CaO. CaCl/sub 2/ to CaCl/sub 2/  

SciTech Connect

One method used at Los Alamos for preparing impure plutonium metal from the impure oxide is batch reduction with calcium metal at 850/sup 0/C in a CaCl/sub 2/ solvent. The solvent salt from this reduction is currently discarded as low-level radioactive waste only because it is saturated with the CaO by-product. We have demonstrated a pyrochemical technique for converting the CaO to CaCl/sub 2/, thereby incorporating solvent recycle into the batch reduction process. We discuss the effectiveness of HCl, Cl/sub 2/, and COCl/sub 2/ as chlorinating agents and present initial data on regenerating and recycling actual, spent-solvent salts. 6 refs., 8 figs., 1 tab.

Fife, K.W.; Bowersox, D.F.; McCormick, E.D.

1985-09-01

300

Comparison of phosgene, chlorine, and hydrogen chloride as reagents for converting molten CaO. CaCl/sub 2/ to CaCl/sub 2/  

SciTech Connect

One method at Los Alamos for preparing impure plutonium metal from the impure oxide is by batch reduction with calcium metal at 850/sup 0/C in a CaCl/sub 2/ solvent. The solvent salt from this reduction is currently discarded as low-level radioactivity waste only because it is saturated with the CaO byproduct. We have demonstrated a pyrochemical technique for converting the CaO to CaCl/sub 2/ thereby incorporating solvent recycling into the batch reduction process. We will discuss the effectiveness of HCl, Cl/sub 2/, and COCl/sub 2/ as chlorinating agents and recycling actual spent process solvent salts. 6 refs., 8 figs.

Fife, K.W.

1985-01-01

301

Role of Y{sub 2}O{sub 3}, CaO, MgO additives on structural and microstructural behavior of zirconia/mullite aggregates  

SciTech Connect

Zirconia mullite (MUZ), Y{sub 2}O{sub 3}-MUZ, CaO-MUZ and MgO-MUZ composites, synthesized through plasma fusion technique, are becoming important due to their commercial scale of production within five minutes of plasma treatment from sillimanite, zircon and alumina mixture. The X-ray diffraction studies reveal the monoclinic zirconia phase in MUZ composite whereas mixed monoclinic, tetragonal and cubic phases of zirconia have been observed in Y{sub 2}O{sub 3}, CaO, MgO added MUZ composites. The Y{sub 2}O{sub 3}, CaO and MgO additives act as sintering aids to favour the transformation and stabilisation of tetragonal and cubic zirconia phases at room temperature. These additives also play a key role in the development of various forms of microstructure to achieve dense MUZ composites.

Mishra, D. K.; Prusty, Sasmita; Mohapatra, B. K.; Singh, S. K.; Behera, S. N. [Advanced Materials Technology Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751 013, Odisha (India); Geological Survey of India, Alandi Road, Pune 411 006, Maharashtra (India); Mineralogy Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751 013, Odisha (India); Advanced Materials Technology Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751 013, Odisha (India); National Institute of Science and Technology (NIST), Berhampur 761 008, Odisha (India)

2012-07-23

302

Spin-Lattice Coefficients for Gd3+ and Eu2+ in CaF2 and for Gd3+ in CaO  

Microsoft Academic Search

We have measured the spin-lattice coefficients of Eu2+ and Gd3+ in CaF2 and Gd3+ in CaO by studying the effect of uniaxial stress on the EPR spectra of these ions. The experimental data show that fourth-order terms in the spin-lattice Hamiltonian give significant contributions. The values of the second-order spin-lattice coefficients are given, and the fourth-order contribution is tentatively identified

R. Calvo; R. A. Isaacson; Z. Sroubek

1969-01-01

303

Quantitative evaluation of antibacterial activities of metallic oxide powders (ZnO, MgO and CaO) by conductimetric assay  

Microsoft Academic Search

Antibacterial activities of metallic oxide (ZnO, MgO and CaO) powders against Staphylococcus aureus and Escherichia coli were quantitatively evaluated by measuring the change in electrical conductivity of the growth medium caused by bacterial metabolism (conductimetric assay). The obtained conductivity curves were analyzed using the growth inhibition kinetic model proposed by Takahashi for calorimetric evaluation, and the metallic oxides were determined

J. Sawai

2003-01-01

304

Thermal expansion of CaAl 4O 7-based refractory compositions containing MgO and CaO additions  

Microsoft Academic Search

Various compositions of recently developed CaAl4O7-based ceramics are mentioned with special reference to those called “nonexpansive refractories” (=NER). The observed effect of deep depression of their thermal expansion is mainly ascribed to the creation of a specific microstructure resulting from high temperature reactions of CaAl4O7 with MgO or CaO additives yielding a CaAl2O4-based liquid. Some details characterizing the phase composition

S. Jonas; F. Nadachowski; D. Szwagierczak; G. Wójcik

2006-01-01

305

Heat requirements in a calciner of CaCO 3 integrated in a CO 2 capture system using CaO  

Microsoft Academic Search

Several systems for CO2 capture using CaO as regenerable sorbent are under development. In addition to a carbonation step, they all need a regeneration step (calcination of CaCO3) to produce a concentrated stream of CO2. Different options for calcination may be possible, but they all share common operating windows that appear when the mass and heat balances in the system

N. Rodriguez; M. Alonso; G. Grasa; J. Carlos Abanades

2008-01-01

306

Fedix on-line information service. Annual status report, September 1990-August 1991.  

National Technical Information Service (NTIS)

FEDIX is an on-line research and education information service with two major objectives: to broaden the participation of colleges and universities in the Federal Government's research, development and education programs by providing easy on-line access t...

J. A. Rodman

1991-01-01

307

Oxidation Studies of SiAlON/MgAlON Ceramics with Fe2O3 and CaO Impurities, Part I: Kinetics  

NASA Astrophysics Data System (ADS)

T he oxidation behaviors of composites SiAlON/MgAlON phases (?-SiAlON, 15R-SiAlON and MgAlON) synthesized from the residue during the leaching treatment of salt cake and corresponding synthetic samples were investigated in air by thermogravimetric measurements. Combined kinetics, viz. linear law + arctan law + parabolic law, are used to describe the kinetics of oxidation in isothermal mode. The oxidation studies reveal the effects of impurities, namely, Fe2O3 and CaO, present in the salt cake residue. The addition of Fe2O3 results in a lower activation energy and more aggressive oxidation. The addition of CaO caused the shrinkage during the synthesis and liquid formation during the oxidation above 1673 K (1400 °C). The impurities of CaO and Fe2O3 in the leaching residue can result in an aggressive oxidation at low temperature and a protective oxidation at temperatures above the eutectic point.

Li, Peng; Zhang, Mei; Teng, Lidong; Seetharaman, Seshadri

2013-02-01

308

CaO insulator coatings and self-healing of defects on V-Cr-Ti alloys in liquid lithium system  

SciTech Connect

Electrically insulating and corrosion-resistant coatings are required at the liquid metal/structural interface in fusion first-wall/blanket applications. Electrical resistance of CaO coatings that were produced on V-5%Cr-5%Ti by exposure of the alloy to liquid Li containing 0.5-85 wt.% dissolved Ca was measured as a function of time at temperatures between 250 and 600{degrees}C. The solute element, Ca in liquid Li, reacted with the alloy substrate at 400-420{degrees}C to produce a CaO coating. Resistance of the coating layer measured in-situ in liquid Li was {approx}10{sup 6} {Omega} at 400{degrees}C. Thermal cycling between 300 and 700{degrees}C changed the coating layer resistance, which followed insulator behavior. These results suggest that thin homogeneous coatings can be produced on variously shaped surfaces by controlling the exposure time, temperature, and composition of the liquid metal. The technique can be applied to various shapes (e.g., inside/outside of tubes, complex geometrical shapes) because the coating is formed by liquid-phase reaction. Examination of the specimens after cooling to room temperature revealed no spallation, but homogeneous crazing cracks were present in the CaO coating. Additional tests to investigate the in-situ self-healing behavior of the cracks indicated that rapid healing occurred at {>=}360{degrees}C.

Park, J.H.; Kassner, T.F.

1995-09-01

309

On-Line Diffusion Profile of a Lipophilic Model Dye in Different Depths of a Hair Follicle in Human Scalp Skin  

Microsoft Academic Search

In skin and hair research, drug targeting to the hair follicle is of great interest in the treatment of skin diseases. The aim of this study is to visualize on-line the diffusion processes of a model fluorophore into the hair follicle at different depths using fresh human scalp skin and confocal laser scanning microscopy. Up to a depth of 500

Ylva Y. Grams; Lynne Whitehead; Gerda Lamers; Nico Sturmann; Joke A. Bouwstra

2005-01-01

310

Need On-line Distant Learning Be Inferior to Face-to-face Learning?  

Microsoft Academic Search

Although some people argue that e-learning could never be as educationally effective as face-to-face learning, this paper discusses some potential benefits of on-line distant learning in comparison with traditional learning. First, on-line distant learning is capable of creating a sense of unity just as classroom learning. Second, text-based on-line learning provides a barrier-free environment. Third, movie-based on-line learning would interest

Yukari Makino

311

On Line Instruction: An Opportunity to Re-Examine and Re-Invent Pedagogy  

ERIC Educational Resources Information Center

|One of the reasons the author agreed to teach a hybrid, on-line course last summer was specifically to either challenge or confirm her negative perceptions about on-line instruction. In order to continue to be an outspoken critic whenever administrators encouraged developing on-line courses for what she assumed were pecuniary considerations, she…

Rosenthal, Irene

2011-01-01

312

Effects of Requiring Students to Meet High Expectation Levels within an On-Line Homework Environment  

ERIC Educational Resources Information Center

|On-line homework is becoming a larger part of mathematics classrooms each year. Thus, ways to maximize the effectiveness of on-line homework for both students and teachers must be investigated. This study sought to provide one possible answer to this aim, by requiring students to achieve at least 50% for any on-line homework assignment in order…

Weber, William J., Jr.

2010-01-01

313

Designing and Teaching an On-Line Course: Spinning Your Web Classroom.  

ERIC Educational Resources Information Center

This guide to developing and teaching an on-line course is intended to lead the instructor through the steps of course development, on-line teaching, and on-line assessment. It emphasizes principles of course design which are outcome-based, performance-assessed, and collaborative. The guide's nine chapters cover the following aspects of course…

Schweizer, Heidi

314

JAERI Tokai on-Line Network System. Software for Front End Processor.  

National Technical Information Service (NTIS)

Computer network ''JAERI Tokai On-line Network System'' has been developed to provide laboratory local users with means of on-line data processing for various data arising from nuclear instrumentation. The on-line network system consists of a large-scale ...

T. Tsugita M. Ishiguro T. Yamada Y. Shimizu

1978-01-01

315

Women Physicians Are Early Adopters of On-Line Continuing Medical Education  

ERIC Educational Resources Information Center

Introduction: On-line continuing medical education (CME) provides advantages to physicians and to medical educators. Although practicing physicians increasingly use on-line CME to meet their educational needs, the overall use of on-line CME remains limited. There are few data to describe the physicians who use this new educational medium; yet,…

Harris, John M., Jr.; Novalis-Marine, Cheryl; Harris, Robin B.

2003-01-01

316

On-line testing service for safety and relief valves  

SciTech Connect

This article is an evaluation of an on-line method for testing safety and relief valves in steam, air, gas, process and water systems that can be performed while the system is operating at normal pressure and temperature. Specially designed fittings are mounted on the valve and hydraulic force is applied from a connecting unit to overcome spring force and open the valve. A load cell measures the force applied, and a displacement transducer records the exact moment of lift and reseat. The full sequence is traced by a multi-pen recorder, providing a permanent record of the test. Average testing time for each valve is usually less than one hour. The test method increases plant safety and conserves energy by eliminating the need to overpressure a system, and by allowing free operation of the valve while it is being tested. This eliminates downtime for processing equipment and hydraulic or pneumatic systems. The procedure can also be used to determine the condition of valves during a plant shutdown, when environmental regulations prevent tests while the valves are in service. Maintenance costs are substantially reduced by eliminating the need to ''gag'' a system for overpressure testing. The test method also will save the time and labor required to remove welded-in valves and the cost of sending them offsite to determine whether they need repairs. The test also prolongs valve life by minimizing the erosion of valve seats.

Not Available

1982-11-01

317

On-line milk spectrometry: analysis of bovine milk composition  

NASA Astrophysics Data System (ADS)

We present partial least squares (PLS) regressions to predict the composition of raw, unhomogenised milk using visible to near infrared spectroscopy. A total of 370 milk samples from individual quarters were collected and analysed on-line by two low cost spectrometers in the wavelength ranges 380-1100 nm and 900-1700 nm. Samples were collected from 22 Friesian, 17 Jersey, 2 Ayrshire and 3 Friesian-Jersey crossbred cows over a period of 7 consecutive days. Transmission spectra were recorded in an inline flowcell through a 0.5 mm thick milk sample. PLS models, where wavelength selection was performed using iterative PLS, were developed for fat, protein, lactose, and somatic cell content. The root mean square error of prediction (and correlation coefficient) for the nir and visible spectrometers respectively were 0.70%(0.93) and 0.91%(0.91) for fat, 0.65%(0.5) and 0.47%(0.79) for protein, 0.36%(0.49) and 0.45%(0.43) for lactose, and 0.50(0.54) and 0.48(0.51) for log10 somatic cells.

Spitzer, Kyle; Kuennemeyer, Rainer; Woolford, Murray; Claycomb, Rod

2005-04-01

318

3081/E processor and its on-line use  

SciTech Connect

The 3081/E is a second generation emulator of a mainframe IBM. One of it's applications will be to form part of the data acquisition system of the upgraded Mark II detector for data taking at the SLAC linear collider. Since the processor does not have direct connections to I/O devices a FASTBUS interface will be provided to allow communication with both SLAC Scanner Processors (which are responsible for the accumulation of data at a crate level) and the experiment's VAX 8600 mainframe. The 3081/E's will supply a significant amount of on-line computing power to the experiment (a single 3081/E is equivalent to 4 to 5 VAX 11/780's). A major advantage of the 3081/E is that program development can be done on an IBM mainframe (such as the one used for off-line analysis) which gives the programmer access to a full range of debugging tools. The processor's performance can be continually monitored by comparison of the results obtained using it to those given when the same program is run on an IBM computer. 9 refs.

Rankin, P.; Bricaud, B.; Gravina, M.; Kunz, P.F.; Oxoby, G.; Trang, Q.; Ferran, P.M.; Fucci, A.; Hinton, R.; Jacobs, D.

1985-05-01

319

AdaBoost-based on-line signature verifier  

NASA Astrophysics Data System (ADS)

Authentication of individuals is rapidly becoming an important issue. The authors previously proposed a Pen-input online signature verification algorithm. The algorithm considers a writer"s signature as a trajectory of pen position, pen pressure, pen azimuth, and pen altitude that evolve over time, so that it is dynamic and biometric. Many algorithms have been proposed and reported to achieve accuracy for on-line signature verification, but setting the threshold value for these algorithms is a problem. In this paper, we introduce a user-generic model generated by AdaBoost, which resolves this problem. When user- specific models (one model for each user) are used for signature verification problems, we need to generate the models using only genuine signatures. Forged signatures are not available because imposters do not give forged signatures for training in advance. However, we can make use of another's forged signature in addition to the genuine signatures for learning by introducing a user generic model. And Adaboost is a well-known classification algorithm, making final decisions depending on the sign of the output value. Therefore, it is not necessary to set the threshold value. A preliminary experiment is performed on a database consisting of data from 50 individuals. This set consists of western-alphabet-based signatures provide by a European research group. In this experiment, our algorithm gives an FRR of 1.88% and an FAR of 1.60%. Since no fine-tuning was done, this preliminary result looks very promising.

Hongo, Yasunori; Muramatsu, Daigo; Matsumoto, Takashi

2005-03-01

320

Hubble Space Telescope on-line operations coordination  

NASA Astrophysics Data System (ADS)

An important aspect of the Hubble Space Telescope (HST) operations is the ability to quickly disseminate and coordinate spacecraft commanding and ground system information for both routine spacecraft operations and Space Shuttle Servicing Missions. When deviating from preplanned activities all new spacecraft commanding, ground system and space system configurations must be reviewed, authorized and executed in an efficient manner. The information describing the changes must be disseminated to and coordinated by a large group of users. In the early years of the HST mission a paper-based Operational Request System was used. The system worked, but was cumbersome to efficiently coordinate with a large geographically dispersed group of users in a timely manner. As network and server technology matured, the HST Project developed an on-line interactive Operations Request System. This Operations Request System is a server-based system (access via HST Net) that provides immediate access to command and ground system information to both local and remotely based Instrument Engineers, Flight Operations Team Controllers, Subsystem Engineers and Project Management. This paper describes the various aspects of the system's submission, review, authorization and implementation processes. Also described is the methodology used to arrive at the current system design and the Graphical User Interface (GUI). This system has been used successfully for all routine and special HST operations for the last five years. This approach to operations coordination is adaptable to spacecraft of any complexity.

Lychenheim, David E.; Pepe, Joyce; Knapp, Debra

2002-12-01

321

Ionospheric Occultation Experiment (IOX) Data On-Line  

NASA Astrophysics Data System (ADS)

The Ionospheric Occultation Experiment (IOX) is a GPS occultation sensor that was part of the US Air Force's Space Test Program PICOSat mission. Launched at the end of September 2001, IOX collected data between November 2001 and October 2004. As opposed to other GPS occultation sensor missions (e.g., GPS-MET, CHAMP, SAC-C) which have a primary focus on tropospheric/stratospheric observations, the IOX mission focus was ionospheric. The PICOSat 67° inclination, 800 km altitude is excellent for performing ionospheric studies because it enables measurements at all local times from an altitude that is almost always above the F-region peak. IOX data can be used to derive total electron content (TEC), electron density profiles, and amplitude and phase scintillation. The complete 3-year IOX database of measurements and data products has been put on-line for general use by the LWS science community. We describe the IOX data products and procedures for utilizing this new resource.

Chang, B.; Straus, P. R.

2005-12-01

322

Using on-line altered auditory feedback treating Parkinsonian speech  

NASA Astrophysics Data System (ADS)

Patients with advanced Parkinson's disease tend to have dysarthric speech that is hesitant, accelerated, and repetitive, and that is often resistant to behavior speech therapy. In this pilot study, the speech disturbances were treated using on-line altered feedbacks (AF) provided by SpeechEasy (SE), an in-the-ear device registered with the FDA for use in humans to treat chronic stuttering. Eight PD patients participated in the study. All had moderate to severe speech disturbances. In addition, two patients had moderate recurring stuttering at the onset of PD after long remission since adolescence, two had bilateral STN DBS, and two bilateral pallidal DBS. An effective combination of delayed auditory feedback and frequency-altered feedback was selected for each subject and provided via SE worn in one ear. All subjects produced speech samples (structured-monologue and reading) under three conditions: baseline, with SE without, and with feedbacks. The speech samples were randomly presented and rated for speech intelligibility goodness using UPDRS-III item 18 and the speaking rate. The results indicted that SpeechEasy is well tolerated and AF can improve speech intelligibility in spontaneous speech. Further investigational use of this device for treating speech disorders in PD is warranted [Work partially supported by Janus Dev. Group, Inc.].

Wang, Emily; Verhagen, Leo; de Vries, Meinou H.

2005-09-01

323

On line sensing of weld penetration using infrared thermography  

SciTech Connect

The objective of this research is to apply new sensing techniques, artificial intelligence, and robotics to improve the welding process through control of penetration depth and width parameters. By producing a constant depth and width of penetration through on line control, the quality and strength of welds may be improved to a new level of reliability previously unobtainable. Experimental data presented in this paper indicate that depth and width of penetration can be monitored by infrared thermography and hence controlled dynamically during the weld process. Infrared thermography is used to monitor surface temperature distributions in the vicinity of the molten metal pool. Characteristics of temperature distributions perpendicular to the direction of arc travel are analyzed and correlated with weld bead width and depth as measured by destructive examination after the weld production. The results show that there is a linear relationship between peak weld plate surface temperature and depth of penetration. Additionally, surface puddle width is found to be directly correlated to measured distance separating solidus temperatures of the molten metal as measured by infrared thermography.

Wang, Y.; Chin, B.A.

1986-01-01

324

The role of resistivity on line-tying kink modes  

NASA Astrophysics Data System (ADS)

In a recent paper [1], Evstatiev et al. proposed a new method to analyze the linear stage of line-tied kink modes in cylindrical geometry. The method consists of summing up a number of one-dimensional (radial) eigenfunctions to obtain the full two-dimensional solution of the problem and has been successfully applied to both ideal and resistive MHD [1]. The present work investigates the role of resistivity on line-tied kink modes. Resistivity affects the problem in two ways. First, it disallows perfect line-tying at the two end-plates of the cylinder. Second, some of the radial eigenfunctions used to construct the full solution of the problem can be unstable tearing modes instead of stable ideal modes, thus opening the possibility of tearing-like instabilities in line-tied configurations. In order to address these two issues, we will use our new method to study different equilibria where the field line pitch as a function of radius can be monotonically increasing (tokamak-like), monotonically decreasing (RFP-like) or constant. Furthermore, a parametric study will be presented by varying resistivity and the results will be compared with the ideal MHD case. [1] E. G. Evstatiev, G. L. Delzanno, J. M. Finn, Physics of Plasmas 13, 072902 (2006).

Evstatiev, Evstati; Delzanno, Gian Luca; Finn, John

2006-10-01

325

On-line complex permittivity measurements for ground penetrating radar  

Microsoft Academic Search

One of the major problems for a subsurface radar to predict is the true target distance and maximum likely penetration depth in the media under investigation. These radar parameters can be determined from the complex permittivity of the media. Since the permittivity of the surface under examination is usually unknown, most subsurface radars are calibrated in time units only: actual

N. Ballard; Alan Langman; Michael R. Inggs

1994-01-01

326

Assessment of the length of each hemodialysis session by on-line dialysate urea monitoring.  

PubMed

Hemodialysis (HD) prescription is usually based on the periodical measurement of the Kt/V achieved in a midweek dialysis session. The purpose of the study was to assess the duration of each HD session to achieve a target dose of dialysis. This allowed to determine whether a given dialysis session may be considered representative of the other HD sessions. Seventy-two HD sessions were studied in 4 stable patients, who were randomly dialyzed during 3 consecutive periods, each lasting 2 weeks, using a different blood flow rate (Qb) in each period: 400, 300 or 200 ml/min. All HD were prolonged to achieve an on-line dialysate urea monitor (UM) Kt/V of 1.2. The UM Kt/V was compared with the Kt/V calculated using pre-HD, post-HD and rebound (45 min post-HD) plasma water urea concentrations. Comparison of the duration of the second midweek dialysis session with the length of the other HD showed 95% concordance intervals (+/-2 SD) of +/-21.08 min for Qb 400, +/-26.88 min for Qb 300 and +/-37.02 min for Qb 200 ml/min. The 95% concordance intervals for whole body urea clearance were +/-32.0, +/-20.36 and +/-15.62 ml/min for Qb 400, 300 and 200 ml/min, respectively. No differences were observed between UM Kt/V and blood-based double-pool Kt/V obtained by the second-generation Daugirdas (1.18 +/- 0.08) and Garred (1.19 +/- 0.08) Kt/V formulas. In conclusion, a great variability was observed between different HD sessions with regard to the whole body urea clearance and the time required to attain a target Kt/V even when the HD characteristics remained constant. The length of every HD required to achieve a target dose of dialysis can be assessed by on-line dialysate urea monitoring. PMID:11528230

Hernandez-Herrera, G; Martin-Malo, A; Rodriguez, M; Aljama, P

2001-09-01

327

On-line pervaporation-capillary electrophoresis for the determination of volatile analytes in food slurries.  

PubMed

Pervaporation has been coupled on-line to capillary electrophoresis (CE) by a flow injection manifold and the replenishment system of the CE instrument. The approach allows volatile analytes to be removed, derivatisated and injected into the capillary meanwhile the sample matrix remains in the pervaporator. Acetone and four aldehydes (namely: formaldehyde, acetaldehyde, hexenal, 2-trans-hexenal) have been simultaneously determined in slurries samples by this approach. The detection limits (LOD) ranged between 0.1 and 0.6 microg/ml, the quantification limits between 0.5 and 2.0 microg/ml and the linear dynamic ranges between the limit of quantitation and 150 microg/ml. The precision, expressed as relative standard deviation (RSD), ranged between 0.76 and 4.21% for repeatability and between 1.12 and 4.78% for within laboratory intermediary precision. The errors involved in the analysis of the target analytes--expressed as RSD for all compounds--ranged between 0.13 and 4.87%. The optimal pervaporation time and that necessary for the individual separation/detection of the target analytes are 15 and 10 min, respectively. The analysis frequency is 4 h(-1). The accuracy of the method and potential matrix effects were established by analysing spiked samples. Recoveries between 96.12 and 105.67% were obtained. The proposed method was applied to 10 samples with different solid contents (namely, such yoghurt, juice and yoghurt-juice mixtures). PMID:16814795

Ruiz-Jiménez, J; Luque de Castro, M D

2006-07-11

328

Effects of poly(lactic-co-glycolic acid) (PLGA) degradability on the apatite-forming capacity of electrospun PLGA/SiO(2)-CaO nonwoven composite fabrics.  

PubMed

We investigated the effects of poly(lactic-co-glycolic acid) (PLGA) degradability on the apatite-forming ability of electrospun PLGA/SiO(2)-CaO gel composite fabric. Two PLGA copolymer compositions with low and high degradability were used in experiments. A nonwoven polymer/ceramic composite fabric composed of randomly mixed microsized biodegradable PLGA fibers and nanosized bioactive SiO(2)-CaO gel fibers was prepared using a simultaneous electrospinning method. A 17 wt.% PLGA solution was prepared using 1,1,3,3-hexafluoro-2-propanol as a solvent, while the SiO(2)-CaO gel solution was prepared via a condensation reaction following hydrolysis of tetraethyl orthosilicate under acidic conditions. PLGA and SiO(2)-CaO gel solutions were spun simultaneously with two separate nozzles under electric fields of 1 and 2 kV/cm using two syringe pumps with flow rates of 7.5 and 5 mL/h, respectively. As controls, low and high degradable PLGA and SiO(2)-CaO gel nonwoven fabrics were also made by the same methods. The five nonwoven fabrics that were produced were exposed to simulated body fluid (SBF) for 1 week. SBF exposure resulted in the deposition of a layer of apatite crystals on the surfaces of both the SiO(2)-CaO gel and the low degradable PLGA/SiO(2)-CaO gel composite fabrics, but not on the low and high degradable PLGA or the high degradable PLGA/SiO(2)-CaO gel composite fabrics. The results are explained in terms of the acidity of the PLGA degradation products, which could have a direct influence on apatite dissolution. PMID:20091921

Kim, In Ae; Rhee, Sang-Hoon

2010-04-01

329

A comparison of the chemical composition and bioactive ingredients of the Chinese medicinal mushroom DongChongXiaCao, its counterfeit and mimic, and fermented mycelium of Cordyceps sinensis  

Microsoft Academic Search

The Chinese herbal drug DongChongXiaCao, a medicinal and edible mushroom originating from the fungus Cordyceps sp., has been developed into health foods. Counterfeit and mimic types are frequently found in markets. Mycelial preparations of Cordyceps sinensis, via submerged fermentation, have been commercialized and also named DongChongXiaCao. This investigation endeavours to characterize the proximate composition, amino acid profiles, and contents of

Tai-Hao Hsu; Li-Hua Shiao; Chienyan Hsieh; Der-Ming Chang

2002-01-01

330

A Compton imaging algorithm for on-line monitoring in hadron therapy  

NASA Astrophysics Data System (ADS)

Hadron therapy, a subject of study by the ENVISION project, promises to provide enhanced accuracy in the treatment of cancer. The Bragg-peak, characteristic of the hadron-beam structure provides larger dose to the tumor while being able to spare surrounding tissue - even tissues in the beam-path, beyond the tumor-site. However, increased dose gradients require more precise treatment, as small beam misalignment can result in dose to healthy, often delicate, surrounding tissue. The requirement for accuracy necessitates imaging during therapy, yet the lack of a transmitted beam makes this difficult. The particulate beam interacts with the target material producing neutrons, positron emitting isotopes and a broad spectra of gamma radiation. Photons from positron-annihilation allow in-beam PET to provide on-line measurements of dose deposition during therapy. However, ib-PET suffers from low statistics and lost projections due to low sensitivity and detector constraints respectively. Instead, Compton imaging of gamma radiation is proposed to provide on-line monitoring for hadron therapy. Compton imaging suffers similarly from low statistics, especially, as is the case here, when incident energy is unknown. To surmount this problem, a method of Compton image reconstruction is proposed and tested using simulated data, which reconstructs incident energy along with the spatial variation in emission density. Through incident energy estimation, a larger range of measurements are available for image-reconstruction - greatly increasing the sensitivity of the system. It is shown in this preliminary study that, even with few statistics, a reasonable estimate of the beam path is calculable.

Gillam, J. E.; Lacasta, C.; Torres-Espallardo, I.; Candela Juan, C.; Llosá, G.; Solevi, P.; Barrio, J.; Rafecas, M.

2011-03-01

331

Worldwide On-line Distance Learning University Astronomy  

NASA Astrophysics Data System (ADS)

The University of Central Lancashire operates a suite of distance learning courses in Astronomy, available both on-line and via CD-ROM. The courses are available worldwide, and emphasise flexibility of study. To this end students can study anything from a single module (1/6^th of a full year at degree level) all the way up to an entire degree entirely by distance learning. Study rates vary from one to four modules each year, and students can move on to Level 2 modules (equivalent to second year level in a UK degree) before completing the full set of Level 1 modules. Over 1000 awards have been made to date. The core syllabus is Astronomy and Cosmology at Level 1, alongside skills in literature research, using computers, and basic observing. We also offer a basic history of European astronomy. At Level 2 we look at the astrophysics of the Sun, the stars, and galaxies including the Milky Way. By Level 3 students are expected to engage in a large individual project, and a collaborative investigation with other students, alongside high-level courses in cosmology, relativity, extreme states of matter and the origins of the elements, life and astronomical objects. While many students are retired people looking to exercise their brains, keen amateur amateurs or professionals with disposable incomes, and significant fraction are teachers seeking to improve their subject knowledge or high school students gaining an edge in the UK University entrance competition. Via our involvement with SALT we offer our courses to members of previously disadvantaged communities. This leads to an incredibly diverse and lively student body.

Eyres, S. P. S.; Hassall, B. J. M.; Butchart, I.; Bromage, G. E.

2006-08-01

332

Introducing ODL in Teacher Education--An On-Line Course on How To Create On-Line Learning Environments.  

ERIC Educational Resources Information Center

This paper describes the online course, Pedagogy in Open Learning, offered by NITOL (Norwaynet with Information Technology for Open Learning). Target groups are teachers, developers, and providers of ODL (Open and Distance Learning). The main goal is to prepare a basis for development and applications of ODL material that uses ICT (Information and…

Ask, Bodil; Haugen, Harald

333

Caos en Dinámica Estelar  

NASA Astrophysics Data System (ADS)

We describe some recent advances in the application of chaos theory to stellar dynamics, particularly those related to triaxial galaxies with central singularities. We also list current research on chaos in stellar dynamics conducted by La Plata astronomers and physicists.

Muzzio, J. C.

334

On-line elemental mapping in biomedical research  

NASA Astrophysics Data System (ADS)

In biomedical research, elemental maps give valuable information about the role of elements in the aetiology of many diseases. For creating such elemental maps we use a scanning proton microprobe set-up to perform Particle Induced X-ray Emission (PIXE), Nuclear Backscattering Spectroscopy (NBS) and Nuclear Forward scattering Spectroscopy (NFS) experiments simultaneously, preceded by a Scanning Transmission Ion Microscopy (STIM) experiment to localise the area of interest. PIXE is used to detect trace elements and NBS/NFS or STIM is used to determine local areal mass densities. Transferring experimental list-mode data into the thick target corrected concentration distributions is a time-consuming process. However, it would be advantageous to display continuously updated elemental maps as the data accumulate. This paper introduces a data processing method for use in biomedical research, based on dynamic analysis. For calculating concentrations, dynamic analysis uses a matrix transform technique instead of the nonlinear least squares fitting procedures in conventional methods. Applying dynamic analysis reduces the processing time from several hours to less than 1 min. The matrix correction factors for use in thick target corrections, are calculated using the local areal mass densities. The over all time reduction of this method is sufficient to calculate the intermediate, peak overlap resolved, background subtracted and thick target corrected concentration distributions while the data acquisition system is gathering a new subset of data.

Brands, P. J. M.; Mutsaers, P. H. A.; de Voigt, M. J. A.

1998-04-01

335

Target-ion source unit ionization efficiency measurement by a method of stable ion beam implantation  

NASA Astrophysics Data System (ADS)

At the IRIS facility a rather precise method of the target-ion source unit ionization efficiency measurement has been developed. The method exploits an off-line mass-separator for the implantation of the ion beams of selected stable isotopes into a tantalum foil placed inside a Faraday cup in the focal plane of the mass-separator. After the implantation of the required amount of the investigated species, tantalum foil has been inserted into the volume of the target-ion source unit prepared for the on-line utilization at the IRIS on-line separator. The first tests have ensured the ionization efficiency values (90±10)% for Rb and (85±10)% for Cs in the empty combined target-ion source unit, which was used as a reference one. For the target-ion source unit with UC target material inside the measured value of the ionization efficiency of Rb was (52±20)%.

Panteleev, V. N.; Barzakh, A. E.; Fedorov, D. V.; Molkanov, P. L.; Moroz, F. V.; Orlov, S. Yu.; Volkov, Yu. M.

2007-11-01

336

Application of Turbulent Flow Chromatography Load Columns for the On-Line Analysis of Anti-Infectives in Wastewaters  

Microsoft Academic Search

We developed an on-line preconcentration liquid chromatography-tandem mass spectrometry method for the determination of the\\u000a anti-infectives sulfamethoxazole, trimethoprim, ciprofloxacin, levofloxacin, clarithromycin and azithromycin in wastewaters\\u000a using a turbulent flow chromatography load column. Recoveries for the target analytes were between 86 and 141%. Limits of\\u000a quantification ranged from 45 to 122 ng L?1 and limits of confirmation from 37 to 142 ng L?1. This study

Pedro A. Segura; Christian Gagnon; Sébastien Sauvé

2009-01-01

337

Analysis of hexavalent chromium in Colla corii asini with on-line sample pretreatment valve-switching ion chromatography.  

PubMed

An ion chromatography (IC) system with on-line sample pretreatment using valve-switching technique was developed for the determination of hexavalent chromium (Cr(VI)) in Colla corii asini. Colla corii asini is a complicated sample with organics as main matrix. In this work, a polymer-based reversed-phase column was used as a pretreatment column. Via valve-switching technique, sample solution with target ions were eluted from a collection loop to analytical columns, with matrix eliminated on-line. Under the optimized separation conditions, the method showed good linearity (r=0.9998) in the range of 0.004-1.0mg/L and satisfactory repeatability (RSD<3%, n=6). The limit of detection (LOD) was 1.4?g/L (S/N=3). The average spiked recoveries of Cr(VI) were 93.4-102.0%. The result showed that the on-line sample pretreatment IC system was convenient and practical for the determination of trace Cr(VI) in Colla corii asini samples. PMID:23891376

Yang, Yuling; He, Jie; Huang, Zhongping; Zhong, Naifei; Zhu, Zuoyi; Jiang, Renyu; You, Jinghua; Lu, Xiuyang; Zhu, Yan; He, Shiwei

2013-07-11

338

Heavy doping of H{sup -} ion in 12CaO.7Al{sub 2}O{sub 3}  

SciTech Connect

12CaO.7Al{sub 2}O{sub 3} (C12A7, mayenite), which has a nanoscale porous structure that can accommodate extraframework species such as hydride (H{sup -}), oxide (O{sup 2-}), hydroxide (OH{sup -}) ions, and electrons, has been doped with H{sup -} ions to investigate its effects as dominant extraframework species. Chemical doping with CaH{sub 2} enables the concentration of H{sup -} ions to reach almost the theoretical maximum. The concentration of H{sup -} ions is characterized by optical absorption intensity ascribed to photoionization of H{sup -} ions, and {sup 1}H magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy. Persistent electron generation, which is accompanied by the formation of an F{sup +} absorption band and electrical conductivity, by irradiation with ultraviolet light at room temperature increases as the H{sup -} ion doping increases until it reaches half the theoretical maximum and then decreases as the H{sup -} ion concentration increases further. This dependence indicates that both H{sup -} and O{sup 2-} ions are necessary for the generation of persistent electrons. - Graphical abstract: CaH{sub 2} reduction markedly enhances H{sup -} ion doping in 12CaO.7Al{sub 2}O{sub 3}. The H{sup -} ion incorporation is evaluated using optical absorption and {sup 1}H-MAS-NMR spectra. Both H{sup -} and O{sup 2-} ions are responsible for photogeneration of electrons. Highlights: > CaH{sub 2} reduction markedly enhances H{sup -} ion doping in 12CaO.7Al{sub 2}O{sub 3}. {yields}The H{sup -} ion incorporation is evaluated using optical absorption and {sup 1}H-MAS-NMR spectra. > Both H{sup -} and O{sup 2-} ions are responsible for photogeneration of electrons.

Hayashi, Katsuro, E-mail: k-hayashi@lucid.msl.titech.ac.jp [Center for Secure Materials, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-34, 4295 Nagatsuta, Yokohama 226-8503 (Japan)

2011-06-15

339

Combined target-ion source unit for production of rare nuclides  

SciTech Connect

A combined target-ion source unit (ionizing target) has been developed for the on-line production of radioactive single-charged ions. The target is able to withstand temperatures of up to 2500 deg. C and also acts as an ion source of surface, electron-beam, and laser ionizations. Using tantalum foil as a target material, the on-line combined target-ion source unit efficiency, which is the product of the ionization and release efficiencies, has been obtained for neutron-deficient isotopes of Eu, Gd, and Yb. These nuclides were ionized by the surface ionization inside a hot tungsten target container, holding tantalum foils as a target material. The results of the combined target-ion source unit use for on-line laser resonant ionization spectroscopy investigation of neutron-deficient Gd isotopes have been also presented. For neutron-rich isotopes produced from a high-density UC target, which were ionized by the surface ionization inside the target container, the ionization efficiency values have been obtained close to 100% for Rb and Cs and 10% for In. For Ag and Sn neutron-richisotopes, the values of the electron-beam ionization efficiency in the volume of the targetcontainer, correspondingly equal to 4% and 2%, have been obtained.

Panteleev, V.N.; Barzakh, A.E.; Fedorov, D.V.; Ionan, A.M.; Mezilev, K.A.; Moroz, F.V.; Orlov, S.Yu.; Volkov, Yu.M.; Andrighetto, A.; Lhersonneau, G.; Rizzi, V.; Tecchio, L.B.; Dubois, M.; Gaubert, G.; Jardin, P.; Lecesne, N.; Leroy, R.; Pacquet, J.Y.; Saint Laurent, M.G.; Villari, A.C.C. [Petersburg Nuclear Physics Institute RAS, Leningrad district 188350 (Russian Federation); Laboratori Nationali di Legnaro, INFN, Viale dell Universita 2, 35020 Legnaro (Padova) (Italy); Grand Accelerateur National d'Ions Lourds (GANIL), Boulevard Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France); Institute de Physique Nucleaire d'Orsay Groupe Source d'Ions, Batiment 106, Division Accelerateur, F-91406 Orsay Cedex (France); Laboratori Nationali del Sud, INFN, via Santa Sofia, 44-95123 Catania (Italy)] (and others)

2006-03-15

340

EPR spectra of Cr3+ ions in LiNbO3:ZnO and LiNbO3: CaO  

NASA Astrophysics Data System (ADS)

The electron paramagnetic resonance spectra of Cr3+ in LiNbO3 co-doped with ZnO or CaO (? 6%) have been studied. Both impurities give rise to the same effect as that observed in MgO-doped samples: a strong diminution of the anisotropic (axial) spectrum reported for LiNbO3:Cr and the appearance of an intense and isotropic line. The origin of this line in the co-doped samples is discussed.

Bravo, D.; Martín, A.; Voda, M.; López, F. J.

1995-12-01

341

Phase selection in the containerless solidification of undercooled CaO {center_dot} 6Al{sub 2}O{sub 3} melts  

SciTech Connect

The CaO {center_dot} 6Al{sub 2}O{sub 3} melts were solidified on an aero-acoustic levitator under a containerless processing condition at various undercoolings. A high-speed video was operated to monitor the recalescence behavior, from which the growth velocity as a function of melt undercooling was determined. The microstructures were observed and the crystalline phases were identified using the X-ray diffraction technique, indicting that the Al{sub 2}O{sub 3} was solidified when the melt temperature was higher than the peritectic temperature, T{sub p}. When the melt was undercooled below T{sub p}, the CaO {center_dot} 6Al{sub 2}O{sub 3} (CA{sub 6}) peritectic phase was crystallized directly from the undercooled melts. With respect to the direct formation of the peritectic phase, further analysis from the viewpoints of competitive nucleation indicated that the minimum free energy principle may be applied to elucidate the nucleation of CA{sub 6} phase. In terms of the competitive growth behavior, the interface attachment kinetics for Al{sub 2}O{sub 3} and CA{sub 6} phases are calculated by using the classical BCT model indicating that although the Al{sub 2}O{sub 3} phase doped by CaO has about four times larger interface kinetic coefficient than that of the CA{sub 6} peritectic phase, the growth kinetics of Al{sub 2}O{sub 3} in the melt with the CaO {center_dot} 6Al{sub 2}O{sub 3} chemical composition is not sufficiently high to replace the CA{sub 6} phase as the primary phase. Therefore, once CA{sub 6} is nucleated, it can develop into a macro crystal as the primary phase. The competitive nucleation and growth behavior in the CA{sub 6} system is different from those in other well-studied peritectic alloys and the present investigation on the phase formation will be an essential supplement to the phase selection theory.

Li Mingjun; Kuribayashi, Kazuhiko

2004-07-12

342

The ASDC Multi Mission Interactive Archive: on line analysis of the Swift\\/XRT data  

Microsoft Academic Search

We present the Swift\\/XRT Interactive Archive and the On-line Analysis tool developed at the ASI Science Data Center (ASDC) as part of the Multi Mission Interactive Archive. The On-line Analysis enables to run the Swift\\/XRT software task ``xrtpipeline'' on any desired XRT observation present in the Swift data archive maintained at ASDC, directly on the web. On-line imaging (with XIMAGE),

G. Stratta; M. Capalbi; M. Perri; P. Giommi

2010-01-01

343

AVC system based on on-line voltage stability monitoring system  

Microsoft Academic Search

This paper presents that when power\\/voltage automatic control system (AVC) is being applied in provincial dispatching centre, in order to implement reactive power\\/voltage optimization control on condition of ensuring limited on-line voltage stability margin, monitoring module of on-line voltage stability should be introduced to realize the coordinated closed loop control of on-line voltage stability monitoring and AVC system. It defines

Xiaoqun Ding; Ling Zhou; Liu Hongliang

2008-01-01

344

On-line Gibbs learning. II. Application to perceptron and multilayer networks  

Microsoft Academic Search

In the preceding paper (``On-line Gibbs Learning. I. General Theory'') we have presented the on-line Gibbs algorithm (OLGA) and studied analytically its asymptotic convergence. In this paper we apply OLGA to on-line supervised learning in several network architectures: a single-layer perceptron, two-layer committee machine, and a winner-takes-all (WTA) classifier. The behavior of OLGA for a single-layer perceptron is studied both

J. W. Kim; H. Sompolinsky

1998-01-01

345

Enhancing communication skills for pediatric visits through on-line training using video demonstrations  

Microsoft Academic Search

BACKGROUND: Training in communication skills for health professionals is important, but there are substantial barriers to individual in-person training for practicing clinicians. We evaluated the feasibility and desirability of on-line training and sought suggestions for future courses. METHODS: Based on successful in-person curricula for communication skills and our previous on-line curricula, we created an on-line course consisting of 28 modules

Kathi J Kemper; Jane M Foy; Larry Wissow; Steve Shore

2008-01-01

346

Information and Knowledge Transfer through Archival Journals and On-Line Communities  

Microsoft Academic Search

Computers, networks, and on-line information have obviously affected many aspects of our lives. In addition, the exponential increases in computer performance make it nearly impossible to predict the future. The convergence of archival journals and on-line communities, however, has already begun to occur and will dramatically change how scientific and engineering information is disseminated. The merging of on-line communities and

Lyle N. Long; Steven J. Schweitzer

2004-01-01

347

Pattern recognition techniques in on-line hand written signature verification - A survey  

Microsoft Academic Search

Over the last two decades, in the field of secure communication and financial on-line applications, we have witnessed an explosive growth in biometric personal authentication systems which are covenant with a measurable physical characteristic or behavioral trait. On-line refers to making use of the time functions of the signing process. Verification of on-line signature as a biometric modality still is

K. R. Radhika; G. N. Sekhar; M. K. Venkatesha

2009-01-01

348

Preventing human errors in aviation maintenance using an on-line maintenance assistance platform  

Microsoft Academic Search

In an effort to increase aviation maintenance and inspection safety, this study develops an on-line maintenance assistance platform (on-line MAP) for technicians to perform maintenance tasks. In this platform, the risk of human error was defined in each task procedure to prevent human errors and improve satisfaction with the job. The on-line MAP reminds technicians to consider the effect of

Guo-Feng Liang; Jhih-Tsong Lin; Sheue-Ling Hwang; Eric Min-yang Wang; Patrick Patterson

2010-01-01

349

A strategy for high-speed countercurrent chromatography purification of specific antioxidants from natural products based on on-line HPLC method with radical scavenging assay.  

PubMed

We have proposed a novel and first strategy of high-speed countercurrent chromatography (HSCCC) purification for the efficient and effective discovery of antioxidant from natural product based on on-line HPLC method with radical scavenging assay. To achieve a strategy for HSCCC purification, the antioxidants in materials are identified by on-line HPLC with DPPH radical scavenging assay. Then, the optimal condition of target peaks would be investigated for the two-phase solvent system, and purified by HSCCC. In this study, the specific antioxidants in red cabbage, perilla and elderberry pigments were evaluated by on-line HPLC with DPPH radical scavenging assay, and purified by HSCCC technique. Specific antioxidants could be rapidly pinpointed in complex mixtures by on-line HPLC with DPPH radical scavenging assay. Then, the optimal two-phase solvent systems were investigated using these HPLC peaks. Finally, the purification of these nine antioxidants form three mixtures were performed by HSCCC. Using mass spectrometric analysis, these antioxidants were confirmed to cyanidin-based anthocyanin from red cabbage and elderberry pigments, and luteolin-based flavones from perrilla pigment. Due to the advantages derived from on-line HPLC with DPPH radical scavenging assay and HSCCC technique, a rapid, efficient and effective strategy has been developed for the discovery of antioxidants from natural products. PMID:23442686

Inoue, Koichi; Baba, Erika; Hino, Tomoaki; Oka, Hisao

2012-03-30

350

Developing Effective Continuous On-Line Monitoring Technologies to Manage Service Degradation of Nuclear Power Plants  

SciTech Connect

Recently, there has been increased interest in using prognostics (i.e, remaining useful life (RUL) prediction) for managing and mitigating aging effects in service-degraded passive nuclear power reactor components. A vital part of this philosophy is the development of tools for detecting and monitoring service-induced degradation. Experience with in-service degradation has shown that rapidly-growing cracks, including several varieties of stress corrosion cracks (SCCs), can grow through a pipe in less than one fuel outage cycle after they initiate. Periodic inspection has limited effectiveness at detecting and managing such degradation requiring a more versatile monitoring philosophy. Acoustic emission testing (AET) and guided wave ultrasonic testing (GUT) are related technologies with potential for on-line monitoring applications. However, harsh operating conditions within NPPs inhibit the widespread implementation of both technologies. For AET, another hurdle is the attenuation of passive degradation signals as they travel though large components, relegating AET to targeted applications. GUT is further hindered by the complexity of GUT signatures limiting its application to the inspection of simple components. The development of sensors that are robust and inexpensive is key to expanding the use of AET and GUT for degradation monitoring in NPPs and improving overall effectiveness. Meanwhile, the effectiveness of AET and GUT in NPPs can be enhanced through thoughtful application of tandem AET-GUT techniques.

Meyer, Ryan M.; Ramuhalli, Pradeep; Bond, Leonard J.; Cumblidge, Stephen E.

2011-09-30

351

Students On-Line Atmospheric Research, SAGE III Outreach for K12  

NASA Astrophysics Data System (ADS)

NASA's Stratospheric Aerosol and Gas Experiment III (SAGE III) is scheduled for launch on a Russian METEOR 3M spacecraft in 2001. SAGE III will monitor aerosols, clouds and several trace gases in the stratosphere, and extend the long-term data records obtained by its predecessors, SAGE I and SAGE II. The SAGE III project is very strongly committed to supporting educational outreach. The Students On-Line Atmospheric Research (SOLAR) program targets K-12 students and teachers nationwide, and offers a variety of science and technology activities related to the SAGE III experiment. These activities are designed to give students hands-on experience in collecting, analyzing, and reporting data. SOLAR focuses on helping students become familiar with the important roles that clouds, aerosols, and various trace gases play in the Earth Climate system. The program offers teacher workshops to provide training on guiding students in data collection activities, and to assist teachers with developing related curriculum materials. A one-week teacher workshop will be offered at the NASA Langley Research Center in June 2001. Currently, more than 120 teachers representing 25 US states are registered for the SOLAR program. This poster will highlight SOLAR activities for students and teachers.

Woods, D. C.; Walters, S. C.; Moore, S. W.

2001-05-01

352

Automated dynamic sampling system for the on-line monitoring of biogenic emissions from living organisms.  

PubMed

An automated system for continuous on-line monitoring of biogenic emissions is presented. The system is designed in such a way that volatiles, emitted as reaction to biotic or abiotic stress, can be unequivocally elucidated. Two identical sampling units, named target and reference bulb, are therefore incorporated into the system and consecutively analyzed in monitoring experiments. A number of precautions were considered during these experiments to avoid the application of unwanted stress onto both organisms. Firstly, the system is constructed in such a way that both bulbs are continuously flushed, i.e. before, during and after analysis, with high purity air to avoid any accumulation of emitted volatiles. Moreover, the air is pre-humidified by bubbling it through water to sustain the biological samples for longer periods in the in vitro environment. Sorptive enrichment on polydimethylsiloxane (PDMS) was used to trap the headspace volatiles. The hydrophobic nature of this material permitted easy removal of trapped moisture by direct flushing of the sampling cartridge with dry air before desorption. The system was used to monitor the emissions from in vitro mechanically wounded ivy (Hedera helix) and of in vitro grown tomato plants (Lycopersicon esculentum Mill.) upon cotton leafworm (Spodoptera littoralis) feeding. Differences in light and dark floral emissions of jasmine (Jasminum polyanthum) were also studied. PMID:11681578

Vercammen, J; Pham-Tuan, H; Sandra, P

2001-09-28

353

Crystallization Behavior and Microstructure of Silica-Free 5K2O-45CaO-50P2O5 Bioglass  

NASA Astrophysics Data System (ADS)

The crystallization behavior and microstructure of silica-free 5K2O-45CaO-50P2O5 (KCP) bioglass have been studied using differential thermal analysis (DTA), X-ray diffraction (XRD), scanning election microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). The activation energy for the KCP bioglass crystallization is found to be 337.4 kJ/mol using a nonisothermal method. The crystalline phases of the glass surface determined by XRD are KCa(PO3)3, 4CaO·3P2O5, and ?-Ca(PO3)2 when the KCP bioglass is crystallized at 903 K for 4 hours. The crystalline phase of the powder samples determined by XRD is ?-Ca(PO3)2 when silica-free KCP glasses crystallized at 873 to 1073 K for 8 hours. Crystallization starts at the surface of the KCP bioglass and then proceeds toward the interior of the glass matrix. The morphology of ?-Ca(PO3)2 is a fibrillar shape 20 to 180 nm in length and 17 to 20 nm in diameter, with an aspect ratio ranging from 1.0 to 10.6.

Wang, Moo-Chin; Lai, You-Cheng; Shih, Wei-Jen; Shih, Ping-Yu; Chen, Guo-Ju; Li, Wang-Long

2010-02-01

354

A Tool for Real Time On-Line Collaboration in Web-Based Learning.  

ERIC Educational Resources Information Center

|This paper describes the design and implementation of a real time on-line collaboration tool, EDUCO. The main focus is to demonstrate how the tool is applied to a real life on-line distance education course, discuss the preliminary research findings of the qualitative empirical study, propose directions for future work and discuss implications.…

Nokelainen, Petri; Miettinen, Miikka; Tirri, Henry; Kurhila, Jaakko

355

Neutron techniques of on-line analysis in the Australian mineral industry  

Microsoft Academic Search

The application of on-line analysis techniques in the mineral industry allows rapid and accurate analyses to be provided in real time for improved control of processes. The Commonwealth Scientific and Industrial Research Organization (CSIRO) Division of Mineral and Process Engineering has developed a number of on-line analysis systems based on neutron techniques for use in the Australian minerals industry. This

Cheryl Lim; Brian Sowerby

1995-01-01

356

False Error Study of On-line Soft Error Detection Mechanisms  

Microsoft Academic Search

With technology scaling, vulnerability to soft errors in random logic is increasing. There is a need for on-line error detection and protection for logic gates even at sea level. The error checker is the key element for an on-line detection mechanism. We compare three different checkers for error detection from the point of view of area, power and false error

M. Kiran Kumar Reddy; Bharadwaj S. Amrutur; Rubin A. Parekhji

2008-01-01

357

Complementary on-line preconcentration strategies for steroids by capillary electrophoresis  

Microsoft Academic Search

Complementary on-line preconcentration strategies are needed when analyzing different classes of solutes in real samples by capillary electrophoresis (CE) with UV detection. The performance of three different on-line preconcentration (focusing) techniques under alkaline conditions was examined in terms of their selectivity and sensitivity enhancement for a group of steroids, including classes of androgens, corticosteroids and estrogens. Electrokinetic focusing of large

Philip Britz-McKibbin; Tomoko Ichihashi; Kanami Tsubota; David D. Y. Chen; Shigeru Terabe

2003-01-01

358

EVALUATION OF USER REACTIONS TO A PROTOTYPE ON-LINE INFORMATION RETRIEVAL SYSTEM.  

ERIC Educational Resources Information Center

REACTIONS OF A USER POPULATION (SCIENTISTS/ENGINEERS AND LIBRARIANS) TO AN OPERATIONAL TEST OF AN ON-LINE SYSTEM FOR RETRIEVING DOCUMENT CITATIONS (RECON) WERE STUDIED AT SEVERAL NASA FACILITIES. DURING A TWO MONTH OPERATIONAL TEST PERIOD, DATA WERE COLLECTED REGARDING FREQUENCY OF USAGE AND DEGREE OF SUCCESS ENCOUNTERED IN CONDUCTING ON-LINE

MEISTER, DAVID; SULLIVAN, DENNIS J.

359

ZMP Compensation by On-Line Trajectory Generation for Biped Robots  

Microsoft Academic Search

This paper proposes an adaptive trajectory genera- tion strategy of using on-line ZMP information with an impedance control method. During walking, since the robot experiences various disturbances like pulling or pushing forces, the walking mechanism should have the robustness against those disturbances, and it re- quires an on-line adaptation ability. If sensed ZMP goes out of the preset ZMP boundary,

Jong Hyeon Park; Hoam Chung

360

The realization for on-line examination system of relay protection in power system  

Microsoft Academic Search

Reference construction program for on-line examination of relay protection in power system of Qinghai Electric Power Corporation, and combined with relevant research data and results, the paper discussed the different realizations for on-line examination of relay protection in power system, and compare on the data sources and functions realization in particular for different programs. This paper also proposed the technical

Li Hongzhi; Guo Junru; Wang Yiting; Wang Ningxia; Xi Xiaolan; Yuan Zhiyi

2010-01-01

361

Assessment of On-Line Comprehension of Computer-Presented Text.  

ERIC Educational Resources Information Center

|This study evaluated multiple-choice and sentence verification technique items as on-line measures of comprehension while subjects (N=940 Air Force enlistees) read computer-presented text. Also evaluated was whether presentation of on-line questions had a positive impact on text learning. (IAH)|

Royer, James M.; And Others

1989-01-01

362

Integrating On-Line Technology into Counseling Curricula: Emerging Humanistic Factors.  

ERIC Educational Resources Information Center

Examines integration of on-line technology into graduate counseling course and student reactions. No student indicated that computer experiences had negative effects on motivation. Challenges include a better understanding of how behavior is affected when mediated by technology, understanding of how human interaction is affected by on-line

Lundberg, David J.

2000-01-01

363

An Effective Way of Teaching Early Childhood Education On-Line.  

ERIC Educational Resources Information Center

|Describes development of a Temple University course on curriculum in early childhood education that provides 60 percent of instruction on-line. Includes information on course design, instructional methods, course implementation, and student course evaluation. Found that students' views about on-line instruction were positive overall and that…

Guha, Smita

2001-01-01

364

College Students' Choice Modeling of Taking On-Line International Business Courses  

ERIC Educational Resources Information Center

|To understand students' choice behavior of taking on-line international business courses, a survey study is conducted to collect information regarding students' actual choices of taking on-line courses and potential factors that may have impacts on students' choices of online learning. Potential factors such as enrollment status, demographic…

Yeh, Robert S.

2006-01-01

365

On-line estimation of product properties for crude distillation units  

Microsoft Academic Search

The stringent quality requirement of petroleum products in a highly competitive market makes on-line monitoring and control of product properties essential. But unfortunately few on-line hardware sensors are available and these are also difficult to maintain. It is, therefore, necessary to develop ‘software sensors’ to predict the quality using other easily measurable secondary variables. This study presents an algorithm that

Tirtha Chatterjee; Deoki N. Saraf

2004-01-01

366

Careers On-Line: Career Networks for University Students with Disabilities.  

ERIC Educational Resources Information Center

|This final report describes Careers On-Line, a model demonstration project that is designed, using the Internet, to provide students with disabilities, career service providers, and employers with up-to-date information on career development, employment, and disabilities. Careers On-Line developed databases on job and internship postings,…

Aune, Betty; Stockdill, Stacy; Johnson, Donna; Lomas, Devora; Gaipa, Beth; Lorsung, Tina

367

An On-Line Pneumatic Cigarette Inspection Device Based on Two Tightly Coupled Microprocessors  

Microsoft Academic Search

Ventilation is a technique for controlling the amount of both nicotine and tar delivered to smokers. VECOM is a system designed to control cigarette ventilation. It operates on every cigarette, on-line with the production process, taking measurements in accordance with a pneumatic model of ventilated cigarettes. Presented are the problems associated with performing on-line measurements, error correction, and overall system

Giacomo Bucci; Giovanni Pezzi; Mario Salmon

1984-01-01

368

Practical experience and results with an advanced on-line gasoline blend optimization system  

Microsoft Academic Search

Refinery profit margins increased significantly by using the on-line gasoline blend optimization system which allows considerable savings resulting from octane give-away reduction, appreciably enhanced butane utilization, optimum use of the available blend components, and increased operating flexibility by elimination of reblends. The experience with this advanced on-line blending system is described in this paper.

Y. Serpemen; K. H. Baumeister; A. Hubel; P. Raichel

1989-01-01

369

Recognizing on-line handwritten alphanumeric characters through flexible structural matching  

Microsoft Academic Search

Speed, accuracy, and #exibility are crucial to the practical use of on-line handwriting recognition. Besides, extensibility is also an important concern as we move from one domain to another which requires the character set to be extended. In this paper, we will propose a simple yet robust structural approach for recognizing on-line handwriting. Our approach is designed to achieve reasonable

Kam-fai Chan; Dit-yan Yeung

1999-01-01

370

Disambiguating Prepositional Phrase Attachments by Using On-Line Dictionary Definitions  

Microsoft Academic Search

Standard on-line dictionaries offer a wealth of knowledge expressed in natural language form. We claim that such knowledge can and should be accessed by natural language processing systems to solve difficult ambiguity problems. This paper sustains that claim by describing a set of computational tools and techniques used to disambiguate prepositional phrase attachments in English sentences, by accessing on-line dictionary

Karen Jensen; Jean-Louis Binot

1987-01-01

371

Fetal pulse oximetry and visual on-line signal identification in the second stage of labor  

Microsoft Academic Search

OBJECTIVE: To determine the accuracy of reflection pulse oximetry and visual on-line signal identification during the second stage of labor. STUDY DESIGN: The reflection pulse oximetry system used allows visual on-line identification of valid signals by showing the original red and infrared signals. With this system oxygen saturation measurements are averaged over nine heartbeats only. An atraumatic suction probe was

M. C. H. Haeusler; G. Arikan; J. Haas; F. Kainer

1996-01-01

372

On-line two-dimensional LC: A rapid and efficient method for the determination of enantiomeric excess in reaction mixtures.  

PubMed

A novel LC-based method for the determination of enantiomeric excess (ee) in a sample mixture has been developed by employing on-line 2D LC. The orthogonal separation system is composed of an NH2 column as the first dimension to elute the target chiral compound from the crude mixture and a chiral column as the second dimension to determine the ee of the target chiral product. A series of crude mixtures from asymmetric reactions have been directly analyzed without prepurification. Good reproducibility (intra- and interday precisions were all under 1.33%) and good accuracy (deviations from ee values determined by 1D HPLC were all <1.03%) have been obtained. Compared with the traditional method for the determination of ee, on-line 2D HPLC can be used in real time and holds great potential in the time-saving determination of ee in asymmetric synthesis. PMID:23893961

Liu, Qi; Jiang, Xinyu; Zheng, Haixing; Su, Wen; Chen, Xiaoqing; Yang, Hua

2013-08-21

373

The application of fully automated on-line solid phase extraction in bioanalysis.  

PubMed

This paper describes the application of fully automated on-line solid phase extraction to the bioanalysis of three example compounds using the Symbiosis platform. The on-line assay performance is compared to off-line methodologies for the same compounds. The three example compounds possess a variety of physicochemical properties and different extraction modes were applied in off-line methods. These methods were developed through optimisation of solid phase or liquid-liquid extraction and chromatographic separation conditions for each of the analytes. Both on-line and off-line methods were evaluated for linearity, carryover, imprecision and inaccuracy. Experiments were also performed investigating modification of ionisation and selectivity against different batches of plasma. On-line and off-line methods were found to be comparable in performance. In conclusion, on-line methodology has distinct advantages for the analysis of large numbers of samples with a marked reduction in manual operation. PMID:20047815

Mitchell, Richard J; Christian, Rachelle; Hughes, Heather; Miah, Asadh; Walker, Donald K

2009-11-13

374

A Web-Based Synchronous Collaborative Review Tool: A Case Study of an On-Line Graduate Course  

ERIC Educational Resources Information Center

|On-line collaboration is an instructional method that facilitates collaboration in an on-line learning setting. To promote effective collaboration, it is vital to reveal both the student's and the instructor's point of view pertaining to effective on-line collaboration. In this study, the effectiveness of a learning management system in on-line

Serce, Fatma Cemile; Yildirim, Soner

2006-01-01

375

Efficient approach for the reliable quantification and confirmation of antibiotics in water using on-line solid-phase extraction liquid chromatography\\/tandem mass spectrometry  

Microsoft Academic Search

The potential of solid-phase extraction coupled on-line to liquid chromatography\\/electrospray tandem mass spectrometry (SPE-LC–ESI-MS\\/MS) has been investigated in this paper for the efficient sensitive quantification and confirmation of 16 antibiotics in water. The list of targeted analytes included 10 quinolones (oxolinic acid (OXO), nalidixic acid (NAL), flumequine (FLU), marbofloxacine (MAR), ofloxacine (OFLO), enrofloxacine (ENR), pefloxacine (PEF), ciprofloxacine (CIP), pipemidic acid

Oscar J. Pozo; Carlos Guerrero; Juan V. Sancho; María Ibáñez; Elena Pitarch; Elbert Hogendoorn; Félix Hernández

2006-01-01

376

Simplified sensing and A\\/D conversion for digitally controlled flyback DC-DC converters with on-line efficiency optimization  

Microsoft Academic Search

This paper presents simplified sensing and analog-to-digital (A\\/D) conversion techniques, targeting low-cost, low-pin-count controller implementation for digitally controlled flyback DC-DC converters with on-line efficiency optimization. Precise output voltage regulation is accomplished by sensing an auxiliary winding voltage on the primary side at the end of the diode conduction interval, thus eliminating the need for secondary-side circuitry and isolation in the

Sang Hee Kang; Dragan Maksimovic

2012-01-01

377

Structure and properties of the slags of continuous converting of copper nickel-containing mattes and concentrates: II. Effect of the SiO2/CaO ratio on the structure and liquidus temperature of the slags  

NASA Astrophysics Data System (ADS)

The structure and liquidus temperature of the SiO2-CaO-Al2O3-FeO x -Cu2O-NiO slags that form during continuous converting of copper mattes and concentrates into blister copper are analyzed. The slag melt compositions are varied over a wide SiO2/CaO range. The slags are studied by X-ray diffraction, scanning electron microscopy, and electron-probe microanalysis. The liquidus temperature of the slags is determined by differential thermal analysis. It is found that, depending on the SiO2/CaO ratio, the structure and liquidus temperature of the slags change and the forms of copper in a slag also change. The SiO2/CaO range in a slag is recommended for the process of continuous converting of a copper nickel-containing sulfide raw materials.

Pigarev, S. P.; Tsymbulov, L. B.; Selivanov, E. N.; Chumarev, V. M.

2012-03-01

378

Effects of CaO, Al 2 O 3 , and MgO additions on the copper solubility, ferric\\/ferrous ratio, and minor-element behavior of iron-silicate slags  

Microsoft Academic Search

The effects of CaO, Al2O3, and MgO additions, singly or in combination, on the copper solubility, the Fe3+\\/Fe2+ ratio in slag, and on the minor-element behavior of silica-saturated iron silicate slags were examined at 1250 °C and a p\\u000a O2 of 10?12 to 10?6 atm. The results indicated that copper solubility in slag was lowered with the addition of CaO,

Hang Goo Kim; H. Y. Sohn

1998-01-01

379

A distributed on-line HV transmission condition monitoring information system  

SciTech Connect

China Light and Power Company Ltd. (CLP) is responsible for supplying electricity to the whole of Hong Kong except Hong Kong Island and Lamma Island. In CLP`s Castle Peak power plant, 19 kV and 23 kV electric supplies are generated. The voltage is then stepped up to 400 kV for transmission. The intermediate control between those transformers and the major 400 kV overhead transmission system lies with a standard One and a half Breaker Configuration switch substations. The substation houses single phase encapsulated SF{sub 6} circuit breakers. In the urban centers, 400 kV substations are installed to step down 400 kV to 132 kV or further to 11 kV for distribution. This paper describes the development of a on-line distributed information system for monitoring the conditions of the whole HV transmission system. The system continuously monitors status of each circuit breaker (CB) together with important operational parameters, such as duration during making and breaking, operations of hydraulic pumps and SF{sub 6} gas pressure etc. Each group of CBs is monitored by a standalone microcontroller using a local area network with a baud rate of 9,600. The information can be recorded on the harddisk of an on-site microcomputer and further transmitted back to a remote computer for alarm generation and multi-station supervision. The CLP 400 kV substation and the Tsz Wan Shan 400 kV substation are among the first targets for development.

Chan, W.L. [Hong Kong Polytechnic Univ., Kowloon (Hong Kong); Pang, S.L.; Chan, T.M. [China Light and Power Co. Ltd., Hong Kong (Hong Kong); So, A.T.P. [City Univ. of Hong Kong, Kowloon (Hong Kong)

1997-04-01

380

First on-line results from the CRIS (Collinear Resonant Ionisation Spectroscopy) beam line at ISOLDE  

NASA Astrophysics Data System (ADS)

The CRIS (Collinear Resonant Ionisation Spectroscopy) experiment at the on-line isotope separator facility, ISOLDE, CERN, has been constructed for high-sensitivity laser spectroscopy measurements on radioactive isotopes. The technique determines the magnetic dipole and electric quadrupole moments, nuclear spin and changes in mean-square charge radii of exotic nuclei via measurement of their hyperfine structures and isotope shifts. In November 2011 the first on-line run was performed using the CRIS beam line, when the hyperfine structure of 207Fr was successfully measured. This paper will describe the technique and experimental setup of CRIS and present the results from the first on-line experiment.

Procter, T. J.; Flanagan, K. T.

2013-04-01

381

Performance comparison between on-line sensors and control charts Performance comparison between on-line sensors and control charts in manufacturing process monitoring  

Microsoft Academic Search

The rapid evolution of sensor technology, using techniques such as lasers, machine vision and pattern recognition, provides the potential to greatly improve the Statistical Process Control (SPC) method for monitoring manufacturing processes. This paper studies the method of using on-line sensors to monitor manufacturing processes and compares that method with the control chart method, a widely used SPC tool. Two

KWEI TANG; WILLIAM W. WILLIAMS; WUSHONG JWO; LINGUO GONG

1999-01-01

382

The on-line processing of socio-emotional information in prototypical scenarios: inferences from brain potentials  

PubMed Central

Little is known about the time course of the mechanisms involved in the on-line processing of socio-emotional information. We used event-related brain potentials (ERPs) to investigate this issue using vignettes that described prototypical, social scenarios. An initial sentence established the social context and the following target sentence ended with a critical word that informed the reader of the character’s socio-emotional response to the situation. Critical words that mismatched rather than matched with a character’s expected feelings elicited a larger ERP negativity (N400) ?200–500?ms after word onset, followed by a larger frontal positivity. Dipole source modeling results indicated that an anterior temporal lobe source accounted for the N400-like effect, which we attribute to the increased demands of integrating general knowledge about social situations (e.g. scripts) with personal- and context-specific information. An additional mediofrontal source contributed to the later ERP effect and presumably reflects high-level mindreading functions. Together, these findings indicate that readers rapidly infer and evaluate on-line a character’s likely socio-emotional response based on the prototypical information provided by the text.

Filik, Ruth; Murphy, Kirsty

2012-01-01

383

Web chatter before and after the Women's Health Initiative results: a content analysis of on-line menopause message boards.  

PubMed

A content analysis was conducted on two on-line menopause message boards over 18 months, before and after the announcement of the Women's Health Initiative (WHI) study results on hormone therapy risks. Messages (N = 785) were coded based on overall context themes and specific content (N = 1132 codes). Results showed that "seeking symptom advice" about physical symptoms represented half (49%) of all codes. More specific content codes reflected inquiries about taking prescription hormone therapies, (HTs) how to cope with the menopausal transition, checking in with community members, and questions related to menopause onset and changes in menstrual patterns. Chi-square tests showed an increase in pharmaceutical advice codings over time on the medical board (p = .057) and a trend on the community board after the WHI (p = .10). Similarly, after the WHI there was an increase in the frequency of codes on the community board related to "Is this menopause?" suggesting a heightened awareness about menopause as a health issue. In conclusion, analyses of on-line message boards provide a rich, economical method to discern the needs of menopausal women, as well as to observe the potential impact of a widely publicized medical event that can inform innovative strategies in health promotion for this target population. PMID:16537284

Cousineau, Tara M; Rancourt, Diana; Green, Traci Craig

2006-03-01

384

Performance of CaO and MgO for the hot gas clean up in gasification of a chlorine-containing (RDF) feedstock.  

PubMed

Calcined limestone (CaO) and calcined dolomite (CaO.MgO) were tested at bench scale to study their usefulness in cleaning hot raw gas from a fluidized bed gasifier of a synthetic or simulated refuse-derived fuel (RDF) with a high (3 wt%) content in chlorine. In the gas cleaning reactor two main reactions occurred simultaneously: the elimination of HCl and the elimination of tar by steam reforming. The elimination of HCl formed CaCl2 and MgCl2 with melting points below the high (above 800 degrees C) temperatures required for the simultaneous tar elimination reaction. So, the CaO-based particles progressively melted and the catalytic gas cleaning reactor became a compact, agglomerated or glued, cake. Therefore, the life and usefulness of the CaO-based solids used was very low. Nevertheless, and to further avoid these problems, some positive guidelines for future research are proposed here. PMID:18372172

Corella, José; Toledo, José M; Molina, Gregorio

2008-03-26

385

On-Line Acoustic Analysis System (OLAAS) Processing & Display System; OLAAS software Design Notebook.  

National Technical Information Service (NTIS)

The report describes the documentation for On-Line Acoustic Analysis System (OLAAS System). This document consists of the programs and subroutines that make up the system, operating instructions for system operation and generation, and additional details ...

1978-01-01

386

A Simulation Tool for On-Line Real Time Parameter Identification  

Microsoft Academic Search

This paper describes a simulation tool developed at West Virginia University(WVU) for on-line aircraft parameter identification (PID) within a specific fault tolerantflight control scheme for the NASA IFCS F-15 program.

Marcello R. Napolitano

2002-01-01

387

7 CFR 42.140 - Operating Characteristic (OC) curves for on-line sampling and inspection.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS STANDARDS FOR CONDITION OF FOOD CONTAINERS Miscellaneous...42.140 Operating Characteristic (OC) curves for on-line sampling and inspection....

2010-01-01

388

7 CFR 42.140 - Operating Characteristic (OC) curves for on-line sampling and inspection.  

Code of Federal Regulations, 2010 CFR

...Practices)DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS STANDARDS FOR CONDITION OF FOOD CONTAINERS Miscellaneous...42.140 Operating Characteristic (OC) curves for on-line sampling and inspection....

2009-01-01

389

7 CFR 42.143 - Operating Characteristic (OC) curves for on-line sampling and inspection.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS STANDARDS FOR CONDITION OF FOOD CONTAINERS Miscellaneous...42.143 Operating Characteristic (OC) curves for on-line sampling and inspection....

2010-01-01

390

7 CFR 42.143 - Operating Characteristic (OC) curves for on-line sampling and inspection.  

Code of Federal Regulations, 2010 CFR

...Practices)DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS STANDARDS FOR CONDITION OF FOOD CONTAINERS Miscellaneous...42.143 Operating Characteristic (OC) curves for on-line sampling and inspection....

2009-01-01

391

7 CFR 42.143 - Operating Characteristic (OC) curves for on-line sampling and inspection.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS STANDARDS FOR CONDITION OF FOOD CONTAINERS Miscellaneous...42.143 Operating Characteristic (OC) curves for on-line sampling and inspection....

2013-01-01

392

On-line chemical composition analyzer development. Status report, February 1, 1993--April 30, 1993  

SciTech Connect

This report relates to the development of an on-line Raman analyzer for control of a distillation column. It is divided into: program issues, experimental control system evaluation, energy savings analysis, and reliability analysis. (DLC)

Garrison, A.A.

1993-06-01

393

Quantitative high-resolution on-line NMR spectroscopy in reaction and process monitoring.  

PubMed

On-line nuclear magnetic resonance spectroscopy (on-line NMR) is a powerful technique for reaction and process monitoring. Different set-ups for direct coupling of reaction and separation equipment with on-line NMR spectroscopy are described. NMR spectroscopy can be used to obtain both qualitative and quantitative information from complex reacting multicomponent mixtures for equilibrium or reaction kinetic studies. Commercial NMR probes can be used at pressures up to 35 MPa and temperatures up to 400 K. Applications are presented for studies of equilibria and kinetics of complex formaldehyde-containing mixtures as well as homogeneously and heterogeneously catalyzed esterification kinetics. Direct coupling of a thin-film evaporator is described as an example for the benefits of on-line NMR spectroscopy in process monitoring. PMID:14729025

Maiwald, Michael; Fischer, Holger H; Kim, Young-Kyu; Albert, Klaus; Hasse, Hans

2004-02-01

394

Diode laser spectrometry for monitoring acetylene on-line in a liquefaction plant  

SciTech Connect

A diode laser source infrared spectrometer has been acquired for use as an on-line monitor for acetylene in the rich (oxygen-enriched) liquid stream of the ORGDP liquefaction plant. The liquefaction plant produces high purity liquid nitrogen.

Maddox, W.L.; Turner, C.M.

1983-11-18

395

On-Line Shared Cataloging in NELINET Libraries: Report of a Survey.  

National Technical Information Service (NTIS)

A questionnaire was distributed to New England Library Information Network (NELINET) members in early 1975. Its purpose was (1) to document how NELINET libraries were using the Ohio College Library Center's (OCLC) on-line shared cataloging system, (2) to ...

R. L. Tighe J. J. Levine

1976-01-01

396

On-line monitoring of mercury and hydrogen chloride in hot gases from coal gasifiers  

SciTech Connect

A variety of analytical techniques which may be applicable to monitoring Hg or HCl in METC gasifier streams were identified. Potential approaches for on-line analysis of Hg and HCl are discussed in detail.

Norton, G.A.; Chriswell, C.D.; Eckels, D.E.; Buttermore, W.H.

1993-09-01

397

Advances in the helium-jet coupled on-line mass separator RAMA. [Recoil Atom Mass Analyzer  

SciTech Connect

General improvements to the on-line mass separator RAMA (Recoil Atom Mass Analyzer) have yielded a greater reliability and efficiency for some elements. A new utilitarian helium-jet chamber has been installed to facilitate quick target and degrader foil changes in addition to a new ion source holder. A higher efficiency hollow-cathode, cathode-extraction ion source, for lower melting point elements (< 1200/sup 0/C) has also been designed. Tests with the beta-delayed proton emitter /sup 37/Ca showed a factor of five increase in yield over the old hollow-cathode, anode-extraction source. A differentially-pumped-tape drive system compatible with both ..gamma..-..gamma.. and ..beta..-..gamma.. experiments has been incorporated into the general detection system. All major operating parameters will soon be monitored by a complete stand-alone microprocessor system which will eventually be upgraded to a closed-loop control system.

Moltz, D M; Aysto, J; Cable, M D; Parry, R F; Haustein, P E; Wouters, J M; Cerny, J

1980-01-01

398

An approach to situational market segmentation on on-line newspapers based on current tasks  

Microsoft Academic Search

We discuss how a task-based situational market segmentation may be applied to on-line newspapers, distinguishing between fact finding, information gathering and browsing. During a period of four weeks we had 41 users keep a diary and recorded their surfing behavior on different on-line newspapers. The results of a Naive Bayes classification with feature selection indicate that content-related attributes such as

Anne Gutschmidt

2010-01-01

399

Analysis of basic hair dyes by HPLC with on-line post-column photochemical derivatisation  

Microsoft Academic Search

A reversed phase liquid chromatographic method is proposed for the analysis of basic hair dyes (raw materials and colourant formulations). The performance of the method was enhanced by introducing post-column on-line photochemical derivatisation in combination with a Diode Array Detector. On-line photoderivatisation provided an effective way of selectively transforming the analytes to compounds with different spectral properties. For each analyte

V. Andrisano; R. Gotti; A. M. DiPietra; V. Cavrini

1994-01-01

400

Culture influences on emotional responses to on-line store atmospheric cues  

Microsoft Academic Search

On-line retailing created a global marketplace with an innumerable array of competitors. Essential to on-line store's ability to attract and retain customers globally is its store atmospherics, which are design elements used to garner attention and create a positive buying environment [Kotler Phillip. Atmospherics as a marketing tool. Journal of Retailing 1974; 49: 48–64.]. The research presented here assesses how

Lenita Davis; Sijun Wang; Andrew Lindridge

2008-01-01

401

An On-line Distributed Induction Motor Monitoring System Based-on ARM and CAN Bus  

Microsoft Academic Search

This paper presents an on-line distributed induction motor monitoring system based-on the ARM (Advanced RISC Machines), which is integrated with the embedded and CAN (Controller Area Network) bus technologies. The hardware structure of the system with the ARM microprocessor S3C2410X and CAN bus controller MCP2510 is introduced; the accomplishment of software of motor on-line monitoring system is also described. Compared

Chenhui Wang; Yukun Liu; Liwei Guo; Yong Yue; Carsten Maple

2011-01-01

402

On-line analysis of coal by neutron induced gamma spectrometry  

Microsoft Academic Search

Thermal neutron prompt gamma activation analysis (PGNAA) has proven to be a useful tool for the multi-elemental characterization\\u000a of coal. The use of isotopic neutron sources allows the construction of relatively small irradiation facilities for the on-line\\u000a analysis of large volume samples. As a first step to an on-line analysis system for process control in a coal blending plant\\u000a we

H. R. Wilde; W. Herzog

1982-01-01

403

On-line analysis of reactor noise using time-series analysis  

Microsoft Academic Search

A method to allow use of time series analysis for on-line noise analysis has been developed. On-line analysis of noise in nuclear power reactors has been limited primarily to spectral analysis and related frequency domain techniques. Time series analysis has many distinct advantages over spectral analysis in the automated processing of reactor noise. However, fitting an autoregressive-moving average (ARMA) model

McGevna

1981-01-01

404

On-line monitoring of yeast cell growth by impedance spectroscopy  

Microsoft Academic Search

The application of impedance spectroscopy to estimate on-line cell concentration was studied. The estimation was based on the relative variation between electrical impedance measured at low (10kHz) and high frequencies (10MHz). Studies were carried out to characterise the influence of changes in physical and chemical parameters on the impedance measurement. Two different possibilities to perform on-line measurements were tested: a

A. Soley; M. Lecina; X. Gámez; J. J. Cairó; P. Riu; X. Rosell; R. Bragós; F. Gòdia

2005-01-01

405

Determination of antibiotic compounds in water by on-line SPE-LC\\/MSD  

Microsoft Academic Search

This study attempts to provide an improved approach for the analysis of antibiotics, which normally exist at low concentration in complex matrices such as receiving streams of wastewater treatment plant discharge. The analytical method developed in this study combines an existing pretreatment technique of solid-phase extraction (SPE) with liquid chromatography mass spectrometry (LC\\/MSD) through on-line connection. The on-line connection suppressed

Keun-Joo Choi; Sang-Goo Kim; Chang-won Kim; Seung-Hyun Kim

2007-01-01

406

Evaluation of high-flux hemodiafiltration efficiency using an on-line urea monitor  

Microsoft Academic Search

On-line urea monitoring of the effluent dialysate offers a real-time assessment of dialysis efficiency and metabolic\\/nutritional characteristics of hemodialysis patients. Quantitative parameters were evaluated by dialysate urea kinetic modeling (DUKM) with an on-line urea sensor in 23 patients treated by high-flux hemodiafiltration (HDF) (215 sessions of 210 to 240 minutes with a mean blood flow rate of 367 +\\/- 44

B Canaud; JY Bosc; M Leblanc; LJ Garred; T Vo; C Mion

1998-01-01

407

On-line minimum-time trajectory planning for industrial manipulators  

Microsoft Academic Search

In this paper, a method for the on-line minimum-time trajectory planning for industrial manipulators was proposed assuming that the path is specified and the maximum allowable actuator torques are limited. The typical on-line trajectory planning strategy in industry is to find polynomials that follow the given path while satisfying the kinematic constraints. Although this traditional method is widely used in

Joon-Young Kim; Dong-Hyeok Kim; Sung-Rak Kim

2007-01-01

408

On-Line Diagnosis of Faulty Insulators Based on Improved ART2 Neural Network  

Microsoft Academic Search

In this paper, an improved ART2 neural network is applied to on-line diagnosis of faulty insulators. Deterioration of insulator\\u000a is a gradual phenomenon. Thus, the cluster centers tend to drift during the process of recognizing on-line monitor signals.\\u000a The drifts of cluster centers cause wrong judgments. In order to solve this problem, an initial layer is settled in layer\\u000a F2.

Hailong Zhang; Weimin Guan; Genzhi Guan

2008-01-01

409

Second-person pronoun use and address strategies in on-line personal advertisements from Quebec  

Microsoft Academic Search

words) The development of various forms of computer-mediated communication has enabled many aspects of social life to occur in on-line environments, including finding and maintaining romantic relationships. Recent research on Internet dating sites has investigated motivations for joining such networks, discursive features of on-line personals, and other social aspects of Internet romance, yet there exists a noticeable lack of sociolinguistic

Rémi A. van Compernolle

410

Second-person pronoun use and address strategies in on-line personal ads from Quebec  

Microsoft Academic Search

The development of various forms of computer-mediated communication has enabled many aspects of social life to occur in on-line environments, including finding and maintaining romantic relationships. Recent research on Internet dating sites has investigated motivations for joining such networks, discursive features of on-line personals, and other social aspects of Internet romance, yet there exists a noticeable lack of sociolinguistic analysis.

Rémi A. van Compernolle

2008-01-01

411

On-line adaptive artificial neural network based vector control of permanent magnet synchronous motors  

Microsoft Academic Search

This paper presents a novel approach of speed control for a permanent magnet synchronous motor (PMSM) using on-line self tuning artificial neural network (ANN). Based on motor dynamics and nonlinear load characteristics, an ANN speed controller is developed and integrated with the vector control scheme of the PMSM drive. The combined use of off-line and on-line weights and biases adjustments

M. A. Rahman; M. A. Hoque

1998-01-01

412

Research of On-line Monitoring of Moisture Content in Transformer Oil  

Microsoft Academic Search

The moisture distribution in the transformer and variation mechanism of moisture in oil is analyzed in this paper, and using relative saturation and temperature as characteristic parameters, a detail scheme of on-line monitoring moisture content in transformer oil is put forward. The polyimide-based capacitive humidity sensor and temperature sensor are employed in on-line monitoring moisture content in oil. Computer is

Fu Qiang; Li Zhi; Lin Yongping

2010-01-01

413

On-Line Manipulation Planning for Two Robot Arms in a Dynamic Environment  

Microsoft Academic Search

In a constantly changing and partially unpredictable envi ronment, robot-motion planning must be on-line. The planner receives a continuous flow of information about occurring events and generates new plans while previously planned mo tions are being executed. This article describes an on-line planner for two cooperating arms whose task is to grab parts of various types on a conveyor belt

Tsai-yen Li; Jean-claude Latombe

1997-01-01

414

Research on an on-line wear condition monitoring system for marine diesel engine  

Microsoft Academic Search

This paper introduces a kind of on-line wear condition monitoring system for marine diesel engines. The system consists of three functions i.e. particle detecting, lubricant quality detecting and shaft torque moment and instantaneous rotation velocity detecting. The system detects wear particles in lubricant with an on-line ferrograph so as to judge wear condition of tribo-pairs of the diesel engine. A

Yan Liu; Zhong Liu; Youbai Xie; Zhigang Yao

2000-01-01

415

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

Microsoft Academic Search

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation

Dennis H. LeMieux

2005-01-01

416

ON-LINE THERMAL BARRIER COATING MONITORING FOR REAL-TIME FAILURE PROTECTION AND LIFE MAXIMIZATION  

Microsoft Academic Search

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization,'' to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation

Dennis H. LeMieux

2003-01-01

417

ON-LINE THERMAL BARRIER COATING MONITORING FOR REAL-TIME FAILURE PROTECTION AND LIFE MAXIMIZATION  

Microsoft Academic Search

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization,'' to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation

Dennis H. LeMieux

2002-01-01

418

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

Microsoft Academic Search

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land -based advanced gas turbines (AGT). Federal

Dennis H. LeMieux

2004-01-01

419

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

Microsoft Academic Search

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Power Generation, Inc proposed a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation

Dennis H. LeMieux

2005-01-01

420

On-Line Bookstore System Based on JSP and JavaBean  

Microsoft Academic Search

This system is a small electronic commerce system- On-line bookstore system based on JSP and JavaBean, has self-contained onstage and background processing function, can make readers register and login, query and scan booklist, order and modify order form, view and issue message and so on, may provide convenient on-line shopping environment for the user, conforms to domestic popular electronic commerce

Bei Ru; Xueyong Li; Lei Zhang

2010-01-01

421

Power System Transient Stability Indexes for On-Line Analysis of \\  

Microsoft Academic Search

The need for on-line analysis of power systems stability vis-a-vis postulated disturbances is felt more than ever before in modern energy control centers. The lack of a general practically implementable analytical method, makes it necessary to consider special classes of contingencies each with its own particular a priori characterization amenable to on-line analysis. In this paper a particular class of

A. Rahimi; G. Schaffer

1987-01-01

422

Biomass estimation using on-line glucose monitoring by flow injection analysis  

Microsoft Academic Search

Abstruct  A new Flow Injection Analysis (FIA) system was developed that permits the on-line monitoring of glucose. This information\\u000a may be used to identify the biomass concentration. The proposed manifold allows the automatic analysis of glucose from 0 to\\u000a 90 g\\/L. The results are in agreement with the analyses provided by HPLC. The system was applied to on-line monitoring of substrate

F. Valero; J. LAFUENTE; M. Poch; C. Solà

1990-01-01

423

One hour neutron monitor and muon telescope on-line CR data and space dangerous phenomena  

Microsoft Academic Search

We apply developing of methods in Zagnetko et al. (2010) for forecasting on the basis of neutron monitor hourly on-line data (as well as on-line muon telescopes hourly data from different directions) geomagnetic storms of scales G5 (3-hour index of geomagnetic activity Kp=9), G4 (Kp=8) and G3 (Kp=7) (according to NOAA Space Weather Scales). These geo-magnetic storms are dangerous for

Alexander Zagnetko; David Applbaum; Lev Dorman; Lev Pustil'Nik; Abraham Sternlieb; Igor Zukerman

2010-01-01

424

On-line Quizzing and its Effect on Student Engagement and Academic Performance  

Microsoft Academic Search

The goal of this study was to determine if on-line out-of-class quizzing would lead to increases in (a) classroom engagement (b) academic performance and (c) preparation perception of college students. Twenty-four sophomore level students enrolled in a required functional anatomy course participated in this study. Results from this study indicate that on-line quizzing had a statistically significant impact on some

Mark G. Urtel; Rafael E. Bahamonde; Alan E. Mikesky; Eileen M. Udry; Jeff S. Vessel

2006-01-01

425

Overcoming Social and Psychological Barriers to Effective On-line Collaboration  

Microsoft Academic Search

Research suggests that collaboration in an on-line course can enhance learning, reduce feelings of isolation, increase satisfaction with the course, and increase motivation. Unfortunately, creating an environment within which collaboration can occur doesn't happen automatically. A review of the literature suggests that for on-line collaboration to be most effective, participants must: (1) see the value of expending the (considerable) effort

Sandra C. Hughes; Leah Wickersham; David L. Ryan-jones; Sara A. Smith

2002-01-01

426

The Research of Zinc-Air Battery On-line Detection System Based on Embedded  

Microsoft Academic Search

This paper mainly presents zinc-air battery on-line detection system. The research of the on-line detection system was based on zinc-air battery production line. Using arm embedded microprocessor as the detection system core. Using sensors detect material, humidity and temperature, roller pressure in the production process, design the hardware and software platform of this detection system, and achieve the function of

Chen Qiang; Li Lei; Zhou Jing; Xiao Yanjun

2009-01-01

427

Automation in sludge dewatering by novel on-line characterisation of flocculation  

Microsoft Academic Search

A novel on-line method and system for characterisation of sludge flocs in view of improving sludge dewatering has been developed. The characterisation of sludge flocs was carried out after the conditioning or the flocculation process. The system uses a conventional CCD-line scan camera providing an on-line monitoring of the relative floc size distribution by image processing procedures. The image processing

M. Sievers; C. Schroeder; H. Bormann; T. I. Onyeche; O. Schlaefer; S. Schaefer

428

The On-line Study of Sentence Comprehension: An Examination of Dual Task Paradigms  

Microsoft Academic Search

This paper presents three studies which examine the susceptibility of sentence comprehension to intrusion by extra-sentential probe words in two on-line dual-task techniques commonly used to study sentence processing: the cross-modal lexical priming paradigm and the unimodal all-visual lexical priming paradigm. It provides both a general review and a direct empirical examination of the effects of task-demand in the on-line

Janet Nicol; David Swinney; Tracy Love; Lea Hald

2006-01-01

429

On-line tuning of fuzzy-neural network for adaptive control of nonlinear dynamical systems  

Microsoft Academic Search

In this paper, the adaptive fuzzy-neural controllers tuned on- line for a class of unknown nonlinear dynamical systems are proposed. To approximate the unknown nonlinear dynamical systems, the fuzzy-neural approximator is established. Furthermore, the control law and update law to tune on-line both the B-spline membership functions and the weighting factors of the adaptive fuzzy-neural controller are derived. Therefore, the

Yih-guang Leu; Tsu-tian Lee; Wei-yen Wang

1997-01-01

430

Long term on-line speaker adaptation for large vocabulary dictation  

Microsoft Academic Search

On-line speaker adaptation is desirable for speech recognitiondictation applications, because it o#ers the possibilitytoimprove the system with the speaker-speci#c data obtainedfrom the user. Since the user will work with such a deviceover a long period, for a dictation system the long termspeed. In contrast to speaker-dependent re-training,the speaker-speci#c speech data does not need to be storedfor on-line speaker adaptation and

Eric Thelen; Forschungslaboratorien Aachen

1996-01-01

431

The effect of interactive on-line learning systems on student learning outcomes in accounting  

Microsoft Academic Search

We examine the association between student use of a unique, interactive, on-line learning system known as MarlinaLS™ and the learning outcomes achieved by students in a major second year undergraduate accounting subject over the period 2002–2003. Primarily, we explore the relationship between students’ use of MarlinaLS™, an on-line system developed specifically to enhance reciprocal learning, and the examination performance of

Bradley N. Potter; Carol G. Johnston

2006-01-01

432

Designing Health Care Risk Management On-Line: Meeting Regulators' Concerns for Fixed-Hour Curriculum  

Microsoft Academic Search

This paper describes the experience of creating a continuing professional education on-line risk management program that is designed to meet Florida's educational requirements for licensure as a risk manager in health-care settings and details the challenges faced when the in-class didactic program of 15 eight-hour sessions is reformatted as an on-line program. Structuring instructor\\/learner interactivity remains a challenge, especially if

Kathryn Hyer; Heidi H. Taylor; Kenneth Nanni

2004-01-01

433

Electronic Portal Imaging with On-Line Correction of Setup Error in Thoracic Irradiation: Clinical Evaluation  

Microsoft Academic Search

Purpose: To analyze setup errors and the feasibility of their on-line correction using electronic portal imaging in the irradiation of lung tumors.Methods and Materials: Sixteen patients with lung cancer were irradiated through opposed anteroposterior fields. Localization images of anteroposterior fields were recorded with an electronic portal imaging device (EPID). Using an in-house developed algorithm for on-line comparison of portal images

J. Van de Steene; F. Van den Heuvel; A. Bel; D. Verellen; J. De Mey; M. Noppen; M. De Beukeleer; G. Storme

1998-01-01

434

On-line monitoring and control of animal-cell cultures  

Microsoft Academic Search

On-line analysis and control of biotechnological processes is still the stepchild in industry. In general, only parameters as dissolved-oxygen concentration, pH and temperature are controlled on-line. Important parameters as substrate and inhibitor concentrations are only measured offline. Controlling these parameters could not only result in more efficient production and higher product quality, but could also save manpower. The attitude in

Pol van der J. J

1996-01-01

435

On-line monitoring of a two-stage anaerobic digestion process using a BOD analyzer  

Microsoft Academic Search

A computer-controlled biochemical oxygen demand (BOD) analyzer has been developed for fast estimation of biochemical oxygen demand (BODst) automatically with the purpose of on-line monitoring of a process for conversion of biomass under field conditions. The instrument was tested by on-line monitoring of the connecting stream between two stages of a two-stage anaerobic process in laboratory scale. In the first

Jing Liu; Gustaf Olsson; Bo Mattiasson

2004-01-01

436

First structures on RyantoRainbow Line. Hframe structure on Line 1 ...  

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

First structures on Ryan-to-Rainbow Line. H-frame structure on Line 1 (right) has historic porcelain suspension insulators and H-frame structure on Line 2 (center) has two historic porcelain insulators and one modern non-ceramic insulator. View to north - Ryan Hydroelectric Facility, Ryan-to-Rainbow 100 kV Transmission Line, West bank of Missouri River, northeast of Great Falls, Great Falls, Cascade County, MT

437

Application of On-Line Digital Noise Analysis to Reactor Diagnosis in JMTR  

Microsoft Academic Search

The reactor noise analysis technique is particularly useful in reactor diagnosis for on-line monitoring if the raw noise signals can be processed in almost real time.An on-line reactor noise analysis system has been developed with use made of the mini-computer HITAC-10. This system utilizes functions for calculating the power spectral density in almost real time, plots the output by digital

Masayuki IZUMI; Hiromasa IIDA

1973-01-01

438

On-line measurement of pneumatic conveying of pulverized coal in pipes  

NASA Astrophysics Data System (ADS)

Running conditions of pulverized coal pipes and mills are of greatly effecting on the combustion and safely operation of utilities in coal-fired power plants. However, there are less effective ways to on-line measure or diagnose the pipes or mills. Based on light fluctuation method, the on-line measurement of size and concentration of pulverized coal were presented in this work. Moreover, the velocity of pulverized coal in pipes was measured by cross correlation method. A novel on-line monitoring system was designed with above measurement principles. The on-line monitoring system was applied to measure pulverized coal pipes and mills in-situ in a 1000MW ultra supercritical unit. The unit had 48 pulverized coal pipes and adopted three-layer opposed firing pattern. The experimental results showed the on-line monitoring system can simultaneously measure the size, concentration and velocity of pulverized coal in different coal pipes accurately and quickly. Using these parameters, the running condition of pulverized coal pipes and mills can be diagnosed. Therefore, this work provided a practical method and instrument for on-line monitoring technology of pulverized coal pipes and mills.

Zhi-hai, Jia; Xue-liang, Fan; Jun-feng, Li; Xiao-shu, Cai; Ji-ze, Liu; Xiao, Cong; Jing-chen, Jia

2009-02-01

439

Factors Related to Adoption and Non-Adoption of Technical and Organizational Recommendations by Farmers Involved with Societe de Developpement du Cacao (SO.DE.CAO) in Cameroon. A Research Summary.  

ERIC Educational Resources Information Center

|In order to promote cocoa production and assist cocoa farmers in overcoming diseases in this crop, the government of Cameroon created an experimental corporation called Societe de Developpement du Cacao (SO.DE.CAO) in 1974. This organization functioned much like an extension service to provide information about crop production and disease…

Kamga, Andre; Cheek, Jimmy G.

440

Sputter target  

DOEpatents

The disclosure relates to an improved sputter target for use in the deposition of hard coatings. An exemplary target is given wherein titanium diboride is brazed to a tantalum backing plate using a gold-palladium-nickel braze alloy.

Gates, Willard G. (Kansas City, MO); Hale, Gerald J. (Overland Park, KS)

1980-01-01

441

77 FR 74826 - Notice of Intent To Seek OMB Approval To Collect Information: On-Line Architectural Barriers Act...  

Federal Register 2010, 2011, 2012, 2013

...On- Line Architectural Barriers Act (ABA) Complaint Form AGENCY: Architectural...On-line Architectural Barriers Act (ABA) Complaint Form. OMB Number: 3014-NEW...complaints under the Architectural Barriers Act (ABA) easier to use, more efficient, and...

2012-12-18

442

78 FR 25697 - Notice of Intent To Seek OMB Approval To Collect Information: On-Line Architectural Barriers Act...  

Federal Register 2010, 2011, 2012, 2013

...On- Line Architectural Barriers Act (ABA) Complaint Form AGENCY: Architectural...On-line Architectural Barriers Act (ABA) Complaint Form. OMB Number: 3014-NEW...complaints under the Architectural Barriers Act (ABA) easier to use, more efficient, and...

2013-05-02

443

Screening of drugs in equine plasma using automated on-line solid-phase extraction coupled with liquid chromatography-tandem mass spectrometry.  

PubMed

A rapid liquid chromatography-tandem mass spectrometry (LC-MS-MS) method was developed for the simultaneous screening of 19 drugs of different classes in equine plasma using automated on-line solid-phase extraction (SPE) coupled with a triple quadrupole mass spectrometer. Plasma samples were first protein precipitated using acetonitrile. After centrifugation, the supernatant was directly injected into the on-line SPE system and analysed by a triple quadrupole LC-MS-MS in positive electrospray ionisation (+ESI) mode with selected reaction monitoring (SRM) scan function. On-line extraction and chromatographic separation of the targeted drugs were performed using respectively a polymeric extraction column (2 cm L x 2.1mm ID, 25 microm particle size) and a reversed-phase C18 LC column (3 cm L x 2.1mm ID, 3 microm particle size) with gradient elution to provide fast analysis time. The overall instrument turnaround time was 9.5 min, inclusive of post-run and equilibration time. Plasma samples fortified with 19 targeted drugs including narcotic analgesics, local anaesthetics, antipsychotics, bronchodilators, mucolytics, corticosteroids, sedative and tranquillisers at sub-parts per billion (ppb) to low parts per trillion (ppt) levels could be consistently detected. No significant matrix interference was observed at the expected retention times of the targeted ion transitions. Over 70% of the drugs studied gave detection limits at or below 100 pg/mL, with some detection limits reaching down to 19 pg/mL. The method had been validated for extraction recovery, precision and sensitivity, and a blockage study had also been carried out. This method is used regularly in the authors' laboratory to screen for the presence of targeted drugs in pre-race plasma samples from racehorses. PMID:20122690

Kwok, W H; Leung, David K K; Leung, Gary N W; Wan, Terence S M; Wong, Colton H F; Wong, Jenny K Y

2010-01-18

444

A Web-Based Synchronous Collaborative Review Tool: A Case Study of an On-line Graduate Course  

Microsoft Academic Search

On-line collaboration is an instructional method that facilitates collaboration in an on-line learning setting. To promote effective collaboration, it is vital to reveal both the student's and the instructor's point of view pertaining to effective on-line collaboration. In this study, the effectiveness of a learning management system in on-line collaboration was first investigated in a graduate course offered through the

Fatma Cemile Serce; Soner Yildirim

2006-01-01

445

Why do people play on-line games? An extended TAM with social influences and flow experience  

Microsoft Academic Search

On-line games have been a highly profitable e-commerce application in recent years. The market value of on-line games is increasing markedly and number of players is rapidly growing. The reasons that people play on-line games is an important area of research. This study views on-line games as entertainment technology. However, while most past studies have focused on task-oriented technology, predictors

Chin-Lung Hsu; Hsi-Peng Lu

2004-01-01

446

A new logic-based alarm analyzer for on-line operational environment  

SciTech Connect

Existing fault diagnostic techniques for power systems are based on the operation of breakers using on-line alarm messages available from the Energy Management Systems (EMSs). Some utility systems also acquire, on-line, the information on relay operations in order to increase the precision of fault diagnosis. This paper proposes a new on-line fault diagnosis system called Intelligent Alarm Analyzer (IAA). This paper identifies the information from sequence-of-events recorders (SERs) at the substations that can be used in the EMS environment. The breaker operations together with the selected SER information provide sufficient data to help pinpoint the fault location(s) and malfunctioning device(s) on-line. The proposed IAA is capable of handling transmission line, busbar and transformer faults as well as relay and breaker malfunctions. The other unique feature of IAA is its logic-based algorithms implemented in an object-oriented software structure. Based on the testing with the actual data from ENEL, the Italian power system, the proposed implementation is highly efficient and promising for the on-line environment.

Miao, H.; Liu, C.C. [Univ. of Washington, Seattle, WA (United States). Dept. of Electrical Engineering; Sforna, M. [ENEL SpA, Cologno Monzese (Italy). Centro Ricerca di Automatica

1996-08-01

447

The implementation of an integrated on-line health education system at RMIT.  

PubMed

The Faculty of Biomedical and Health Sciences at RMIT has been developing an on-line health education system using a systems thinking approach, to create a learning environment whose basis is supported by Information Technology (IT). The centre-piece of this system is the Faculty Learning Centre, which has been created, both in space and layout, to promote collaborative learning between the students, so that the educator is physically assimilated with the student body. This facility is supplemented by the Faculty WWW server, which has been the main vehicle for course material dissemination to students. To ensure an effective on-line teaching environment, the position of an on-line facilitator has been created, whose responsibilities include both the continual evaluation of the system and the implementation of appropriate system changes. Aspects have included the production of a staff development training program and extensive user documentation. This paper discusses the systems thinking approach used to implement this integrated on-line system, and the establishment of explicit educational rationales in the use of IT to support learning strategies. Some examples of the on-line educational programs are also presented. PMID:9726521

Zylinski, J; Allan, G L; Jamieson, P; Maher, K P; Green, R; Hislop, J

1998-06-01

448

Effect of Slag Composition on the Distribution Behavior of Pb between FetO-SiO2 (-CaO, Al2O3) Slag and Molten Copper  

NASA Astrophysics Data System (ADS)

The distribution behavior of Pb between molten copper and FetO-SiO2 (-CaO, Al2O3) slags was investigated at 1473 K (1200 °C) and p_{{{{O}}2 }} = 10^{ - 10} {{atm}} in view of the reaction mechanism of Pb dissolution into the slag. Furthermore, the lead capacity of the slag was estimated from the experimental results. The distribution ratio of Pb ( L Pb) decreases with increasing CaO content ( 6 mass pct) irrespective of Fe/SiO2 ratio (1.4 to 1.7). However, the addition of alumina into a slag with Fe/SiO2 = 1.5 linearly decreases the L Pb, whereas a minimum value is observed at about 4 mass pct Al2O3 at Fe/SiO2 = 1.3. The log L Pb continuously decreases with increasing Fe/SiO2 ratio, and the addition of Al2O3 (5 to 15 mass pct) into the silica-saturated iron silicate slag (Fe/SiO2 < 1.0) yields the highest Pb distribution ratio. This is mainly due to a decrease in the FeO activity even at silica saturation. The log L Pb linearly decreases by increasing the log (Fe3+/Fe2+) value. The Pb distribution ratio increases and the excess free energy of PbO decreases with increasing Cu2O content in the slag. However, from the viewpoint of copper loss into the slag, the silica-saturated system containing small amounts of alumina is strongly recommended to stabilize PbO in the slag phase at a low Cu2O content. The lead capacity was defined in the current study and shows a linear correlation with the activity of FeO in a logarithmic scale, indicating that the concept of lead capacity is a good measure of absorption ability of Pb in iron silicate slags, and the activity of FeO can be a good basicity index in iron silicate slag.

Heo, Jung Ho; Park, Soo-Sang; Park, Joo Hyun

2012-10-01

449

Solid-state Marx based two-switch voltage modulator for the On-Line Isotope Mass Separator accelerator at the European Organization for Nuclear Research  

SciTech Connect

A new circuit topology is proposed to replace the actual pulse transformer and thyratron based resonant modulator that supplies the 60 kV target potential for the ion acceleration of the On-Line Isotope Mass Separator accelerator, the stability of which is critical for the mass resolution downstream separator, at the European Organization for Nuclear Research. The improved modulator uses two solid-state switches working together, each one based on the Marx generator concept, operating as series and parallel switches, reducing the stress on the series stacked semiconductors, and also as auxiliary pulse generator in order to fulfill the target requirements. Preliminary results of a 10 kV prototype, using 1200 V insulated gate bipolar transistors and capacitors in the solid-state Marx circuits, ten stages each, with an electrical equivalent circuit of the target, are presented, demonstrating both the improved voltage stability and pulse flexibility potential wanted for this new modulator.

Redondo, L. M.; Canacsinh, H.; Ferrao, N.; Mendes, C. [Instituto Superior de Engenharia de Lisboa (ISEL), R. Conselheiro Emidio Navarro 1, Lisbon 1959-007 (Portugal); Nuclear Physics Center-Lisbon University (CFNUL), Av. Prof. Gama Pinto 2, Lisbon 1649-003 (Portugal); Silva, J. Fernando [Instituto Superior Tecnico (IST), Universidade Tecnica de Lisboa, Av. Rovisco Pais 1, Lisbon 1049-001 (Portugal); Center for Innovation in Electrical and Energy Engineering-TU Lisbon, Av. Rovisco Pais 1, Lisbon 1049-001 (Portugal); Soares, R. [Nuclear Physics Center--Lisbon University (CFNUL), Av. Prof. Gama Pinto 2, Lisbon 1649-003 (Portugal); ABT Group, TE Department, Site de Prevessin, FR-01631 CERN (Switzerland); Schipper, J.; Fowler, A. [ABT Group, TE Department, Site de Prevessin, FR-01631 CERN (Switzerland)

2010-07-15

450

On-line interprofessional learning: introducing constructivism through enquiry-based learning and peer review.  

PubMed

Interest in on-line methods of learning has accelerated in recent years. There has also been an interest in developing student-centred approaches to learning and interprofessional education. This paper illustrates the issues in designing a large (more than 700 students), on-line, inter-professional module for third year, undergraduate students drawn from nine professional healthcare courses and from four campus sites. It uses an enquiry-based learning approach. The learning theories of Piaget, Vygotsky and Schön are integrated with the on-line frameworks of Salmon and Collis et al., together with conclusions drawn from the literature and our own experiences, to produce a design that encourages students to learn through participation, re-iteration, peer-review and reflection. Consideration is given to improving student motivation and attitudes towards change, both in the design and the delivery of the module. PMID:15369969

Hughes, Matthew; Ventura, Susie; Dando, Mark

2004-08-01

451

Optimal composition of dialysis fluid for on-line hemodiafiltration in central dialysis fluid delivery system.  

PubMed

In this paper, we propose 'the preferred composition of dialysis fluid for on-line hemodiafiltration (HDF) in central dialysis fluid delivery system, (CDDS)': sodium concentration 138-140 mEq/l; potassium concentration 2.0 mEq/l; calcium concentration 2.5-3.5 mEq/l; glucose concentration 1.0-1.5 g/l; buffer: bicarbonate (acetate free is preferred). Concentrations of electrolytes in dialysis fluid (= substitution fluid) are applied to the compositions of launched dialysis fluid in Japan. From the viewpoint of biocompatibility and correction of metabolic acidosis, acetate-free bicarbonate buffer is thought to be important. This proposal of the preferred composition of dialysis fluid for on-line HDF in CDDS is based on a few reports. Further investigations and research to reveal the optimal composition of dialysis fluid for on-line HDF are expected in the future. PMID:23466383

Tomo, Tadashi

2013-02-25

452

On-line monitoring system for skiving of NdFeB laminate components  

NASA Astrophysics Data System (ADS)

An on-line monitoring system for controlling the thickness and the flatness of NdFeB (Neodymium Ferrite Boron) laminate components during the skiving process is reported. The on-line monitoring system mainly consists of a non-contact eddy-sensor, a preamplifier, an A/D conversion card and a computer. The detailed description of the system with respect to the connection between the probe and the grinder is provided. Practical on-line measurement and data acquisition experiments are carried out. Experimental results indicate that the system principle is feasible and the accuracy is up to ?m order. The monitoring system can be used to improve conventional grinders that are widely employed currently in China.

Li, Yueqiang; Chen, Qingshan; Lu, Yong

2010-08-01

453

Recent advances in on-line concentration and separation of amino acids using capillary electrophoresis.  

PubMed

This article highlights recent methodological developments in the on-line concentration and separation of amino acids and their enantiomers using capillary electrophoresis. Sections are dedicated to recent contributions to on-line concentration strategies such as field-amplified sample stacking, large-volume sample stacking, dynamic pH junction, transient isotachophoresis, sweeping, and the combination of two methods. The main applications, advantages, and limitations of these procedures in the biological, food, and pharmaceutical fields are addressed. Comprehensive tables listing on-line techniques for the concentration and separation of amino acids and their enantiomers, categorized by the stacking strategies used, background electrolytes, sample matrix, limit of detection, and enhancement factor, are provided. PMID:23539097

Chiu, Tai-Chia

2013-03-29

454

Treatment of hepatic encephalopathy by on-line hemodiafiltration: a case series study  

PubMed Central

Background It is thought that a good survival rate of patients with acute liver failure can be achieved by establishing an artificial liver support system that reliably compensates liver function until the liver regenerates or a patient undergoes transplantation. We introduced a new artificial liver support system, on-line hemodiafiltration, in patients with acute liver failure. Methods This case series study was conducted from May 2001 to October 2008 at the medical intensive care unit of a tertiary care academic medical center. Seventeen consecutive patients who admitted to our hospital presenting with acute liver failure were treated with artificial liver support including daily on-line hemodiafiltration and plasma exchange. Results After 4.9 ± 0.7 (mean ± SD) on-line hemodiafiltration sessions, 16 of 17 (94.1%) patients completely recovered from hepatic encephalopathy and maintained consciousness for 16.4 ± 3.4 (7-55) days until discontinuation of artificial liver support (a total of 14.4 ± 2.6 [6-47] on-line hemodiafiltration sessions). Significant correlation was observed between the degree of encephalopathy and number of sessions of on-line HDF required for recovery of consciousness. Of the 16 patients who recovered consciousness, 7 fully recovered and returned to society with no cognitive sequelae, 3 died of complications of acute liver failure except brain edema, and the remaining 6 were candidates for liver transplantation; 2 of them received living-related liver transplantation but 4 died without transplantation after discontinuation of therapy. Conclusions On-line hemodiafiltration was effective in patients with acute liver failure, and consciousness was maintained for the duration of artificial liver support, even in those in whom it was considered that hepatic function was completely abolished.

2010-01-01

455

On-line health companion contact among chronically ill in the Netherlands.  

PubMed

A health companion is a patient who supports another patient or patient group with a similar health condition. Health companions deliver more and more support by the Internet. However, little is known about the characteristics of the users, their motivation, type of technology used and effects on health and the healthcare delivery process. The objective of the paper is to understand motivation, technology and effects of on-line health companion contact in the Netherlands concerning chronic diseases (DBM, COPD, CHF, CRD, CMD). The On-line Health Companion Contact Model was created to frame the research process. An extensive on-line questionnaire was taken from patients with various chronic disorders and using on-line health companion contact to obtain quantitative and qualitative data. Obtaining information was found the key motivation for applying on-line health companion contact and several characteristics play a role in the selection to use a specific website, including: closed access; the topics discussed; the easy use; the type of users and a clear structure. Respondents prefer website facilitated by a forum or social networking site. Other factors are the possibility to share experiences with other patients, to find recognition and understanding and to meet new people. These positive aspects are of greater importance than the perceived barriers including privacy concerns, negative stories and whining other users and concerns regarding the quality of information. On-line health companion contact can increase the quality of life and self-management because respondents perceived to be better informed, better able to accept their disease, better deal with their situation and to receive an increased amount of social support. PMID:21909478

Dumaij, Adrie C M; Tijssen, E C G

2011-03-30

456

On-line object tracking method based on co-training  

NASA Astrophysics Data System (ADS)

The tracking method based on Co-Training framework considers the object tracking as a semi-supervised learning problem. This paper proposes a new on-line tracking method based on Co-Training framework. The method fuses two features to describe the object and do randomizing affine deformation with positive examples to increase the number of positive examples. Experimental results demonstrate, the on-line tracking method based on Co-training framework can work robustly in long-term tracking and the drift of tracking can be effectively avoided.

Lai, Jianhong; Peng, Zhenming; Yang, Yong

2012-11-01

457

On-line HPLC/GC techniques for the analyses of biomass derived hydrocarbons  

SciTech Connect

An automated on-line high-performance liquid chromatography/gas chromatography (HPLC/GC) technique was developed for the analysis of biomass extractables (biocrude) as renewable sources of energy. The method was developed with a simulated biocrude mixture of n-alkane and terpenoid standards, and was applied to a sample from Pedilanthus macrocarpus (Euphorbiaceae). Hydrocarbon group-type separations were achieved by using normal-phase HPLC. On-line injections into a GC equipped with glass capillary column provided separations of the individual constituents. The technique can be used to monitor the agronomic development of bioenergy crops to optimize the production of the economically significant components.

Luzbetak, D.J.; Hoffmann, J.J.

1982-01-01

458

Line-on-Line Coincidence: A New Type of Epitaxy Found in Organic-Organic Heterolayers  

NASA Astrophysics Data System (ADS)

We propose a new type of epitaxy, line-on-line coincidence (LOL), which explains the ordering in the organic-organic heterolayer system PTCDA on HBC on graphite. LOL epitaxy is similar to point-on-line coincidence (POL) in the sense that all overlayer molecules lie on parallel, equally spaced lines. The key difference to POL is that these lines are not restricted to primitive lattice lines of the substrate lattice. Potential energy calculations demonstrate that this new type of epitaxy is indeed characterized by a minimum in the overlayer-substrate interaction potential.

Mannsfeld, Stefan C.; Leo, Karl; Fritz, Torsten

2005-02-01

459

Description of an on-line decision-aid tool for generation-load balance control  

SciTech Connect

This paper presents the preliminary results of a design study, carried out at the Research Center of Electricite de France, of an on-line decision aid tool for real-time operation. This tool attempts to provide operators with an aid for an on-line generation rescheduling, when disturbances occur in the generation-load balance. Using Artificial Intelligence techniques, a method has been developed (based on a design-aid mock-up) which combines a knowledge base, heuristic rules, and classical algorithms. The first results, issued from simulations on cases derived from actual operation, are very promising.

Jourdin, P.; Vintache, P.; Heilbronn, B.; Lagrange, V. (Electricite de France, Clamart (France). Direction des Etudes et Recherches); Cartignies, E.; Millot, P. (Univ. de Valenciennes (France). Lab. d'Automatique Industrielle et Humaine)

1994-02-01

460

An on-line data acquisition system based on Norsk-Data ND-560 computer  

NASA Astrophysics Data System (ADS)

This paper describes a high-speed data acquisition system based on CAMAC for Norsk Data ND-560 computer operating in a multiuser environment. As opposed to the present trend, the system has been implemented with minimum hardware at CAMAC level taking advantage of the dual processors of ND-560. The package consists of several coordinated tasks running in the two CPUs which acquire data, record on tape, permit on-line analysis and display the data and perform related control operations. It has been used in several experiments at VECC and its performance in on-line experiments is reported.

Bandyopadhyay, Asismoy; Roy, Amitava; Dey, Swapan Kumar; Bhattacharya, Sailajananda; Bhowmik, Ranjan Kumar

1987-06-01

461

Synthesis of On-Line Planning Tester for Non-deterministic EFSM Models  

Microsoft Academic Search

\\u000a We describe a method and algorithm for model-based construction of an on-line reactive planning tester (RPT) for black-box\\u000a testing of state based systems specified by non-deterministic extended finite state machine (EFSM) models. The key idea of\\u000a RPT lies in off-line preprocessing of the System Under Test (SUT) model to prepare the data for efficient on-line reactive\\u000a test planning. A test

Marko Kääramees; Jüri Vain; Kullo Raiend

2010-01-01

462

Retrospective analysis of medication incidents reported using an on-line reporting system  

Microsoft Academic Search

Objective  To examine the types of prescribing, administration and dispensing incidents reported to an on-line incident-reporting scheme\\u000a and determine the types of healthcare professionals responsible for reporting such incidents.\\u000a \\u000a \\u000a \\u000a Method  Retrospective analysis of medication-related incidents reported to an on-line incident-reporting scheme in a large (1000-bed)\\u000a teaching hospital in the UK.\\u000a \\u000a \\u000a \\u000a Main outcome measures  Frequency and type of incidents, the discipline of the health

Darren M Ashcroft; Jonathan Cooke

2006-01-01

463

On-line analysis of cracking in cortical bone under wedge penetration.  

PubMed

Understanding the mechanism of crack propagation during bone cutting is necessary for the development of realistic bone cutting models. This article studies the on-line fractural behaviour of cortical bone caused by penetration with a sharp metallic wedge mounted on an on-line loading stage within an X-ray microfocus computed tomography system. The experimental results demonstrated anisotropy in crack propagation depending on the penetration direction with regard to the longitudinal bone axis and relate the crack growth to the extent of penetration. Scanning electron microscopy is performed to analyse the mechanism of cracking in the two phase microstructure of compact bone. PMID:23025172

Alam, Khurshid; Kerckhofs, Greet; Mitrofanov, Alexander V; Lomov, Stepan; Wevers, Martin; Silberschmidt, Vadim V

2012-09-01

464

On-line recognition of supernova neutrino bursts in the LVD  

NASA Astrophysics Data System (ADS)

In this paper we show the capabilities of the Large Volume Detector (INFN Gran Sasso National Laboratory) to identify a neutrino burst associated with a supernova explosion, in the absence of an “external trigger”, e.g., an optical observation. We describe how the detector trigger and event selection have been optimized for this purpose, and we detail the algorithm used for the on-line burst recognition. The on-line sensitivity of the detector is defined and discussed in terms of supernova distance and ? intensity at the source.

Agafonova, N. Yu.; Aglietta, M.; Antonioli, P.; Bari, G.; Bonardi, A.; Boyarkin, V. V.; Bruno, G.; Fulgione, W.; Galeotti, P.; Garbini, M.; Ghia, P. L.; Giusti, P.; Gomez, F.; Kemp, E.; Kuznetsov, V. V.; Kuznetsov, V. A.; Malguin, A. S.; Menghetti, H.; Pesci, A.; Persiani, R.; Pless, I. A.; Porta, A.; Ryasny, V. G.; Ryazhskaya, O. G.; Saavedra, O.; Sartorelli, G.; Selvi, M.; Vigorito, C.; Votano, L.; Yakushev, V. F.; Zatsepin, G. T.; Zichichi, A.

2008-01-01

465

Development of nuclear techniques for on-line analysis in the coal industry  

NASA Astrophysics Data System (ADS)

Recent Australian developments in the application of nuclear techniques to the on-line analysis of coal are reviewed. These techniques include on-line determination of ash in coal using dual-energy ?-ray transmission, pair production and natural ?-ray techniques; in-stream analysis of coal slurries using neutron and ?-ray techniques; on-belt determination of moisture in coke using fast-neutron and ?-ray transmission; and the analysis of unburnt carbon in fly ash using neutron inelastic-scatter ?-rays. The use of these techniques permits the improved control of industrial processes with consequent large economic benefits.

Sowerby, B. D.; Watt, J. S.

1990-12-01

466

On-line and Memory-based: Revisiting the Relationship Between Candidate Evaluation Processing Models  

Microsoft Academic Search

Reexamining the relationship between the on-line and memory-based information processing models, this study presents a theoretical\\u000a basis for the co-occurrence of on-line and memory-based processes and proposes a hybrid model. The study empirically tests\\u000a the hybrid model by employing real-time tracking of participants’ reactions to two candidates in a US presidential primary\\u000a election debate. The findings confirm an independent, but

Young Mie Kim; Kelly Garrett

467

The 1-way on-line coupled atmospheric chemistry model system MECO(n) - Part 3: Meteorological evaluation of the on-line coupled system  

NASA Astrophysics Data System (ADS)

Three detailed meteorological case studies are conducted with the global and regional atmospheric chemistry model system ECHAM5/MESSy(?COSMO/MESSy)n, shortly named MECO(n). The aim of this article is to assess the general performance of the on-line coupling of the regional model COSMO to the global model ECHAM5. The cases are characterised by intense weather systems in Central Europe: a cold front passage in March 2010, a convective frontal event in July 2007, and the high impact winter storm "Kyrill" in January 2007. Simulations are performed with the new on-line-coupled model system and compared to classical, off-line COSMO hindcast simulations driven by ECMWF analyses. Precipitation observations from rain gauges and ECMWF analysis fields are used as reference, and both qualitative and quantitative measures are used to characterise the quality of the various simulations. It is shown that, not surprisingly, simulations with a shorter lead time generally produce more accurate simulations. Irrespective of lead time, the accuracy of the on-line and off-line COSMO simulations are comparable for the three cases. This result indicates that the new global and regional model system MECO(n) is able to simulate key mid-latitude weather systems, including cyclones, fronts, and convective precipitation, as accurately as present-day state-of-the-art regional weather prediction models in standard off-line configuration. Therefore, MECO(n) will be applied to simulate atmospheric chemistry exploring the model's full capabilities during meteorologically challenging conditions.

Hofmann, C.; Kerkweg, A.; Wernli, H.; Jöckel, P.

2012-01-01

468

On-line determination and control of fat content in batches of beef trimmings by NIR imaging spectroscopy.  

PubMed

An NIR imaging scanner was calibrated for on-line determination of the fat content of beef trimmings. A good calibration model was obtained for fat in intact beef (R=0.98, RMSECV=3.0%). The developed model could be used on single pixels to get an image of the fat distribution, or on the average spectrum from each trimming/portion of trimmings passing under the scanner. The fat model gave a rather high prediction error (RMSEP=8.7%) and a correlation of 0.84 when applied to 45 single trimmings with average fat content ranging from 1.6 to 49.3% fat. Test measurements on streams of trimmings making up batches varying from 10 to 24 kg gave a much lower prediction error (RMSEP=1.33%). Simulations based on true measurements indicate that the RMSEP decreases with increasing batch size and, for the present case, reached about 0.6% for 100 kg batches. The NIR scanner was tested on six batches of intact trimmings varying from 145 to 210 kg and gave similar fat estimates as an established microwave system obtained on the ground batches. The proven concept should be applicable to on-line estimation of fat in trimmings in order to determine the batch fat content and also to control the production of batches to different target fat levels. A possible requirement for the concept to work properly is that the trimming or layer of trimmings on the belt is not too thick. In this study maximum thickness was about 8 cm. Thicker trimmings might be measured, but careful hardware adjustments are then required. PMID:21636219

Wold, J P; O'Farrell, M; Høy, M; Tschudi, J

2011-05-11

469

Comparison of CaO's effect on the fate of heavy metals during thermal treatment of two typical types of MSWI fly ashes in China.  

PubMed

Both grate and fluidized bed incinerators are widely used for MSW incineration in China. CaO addition for removing hazardous emissions from MSWI flue gas changes the characteristics of fly ash and affects the thermal behavior of heavy metals when the ash is reheated. In the present work, two types of MSWI fly ashes, sampled from both grate and fluidized bed incinerators respectively, were thermal treated at 1023-1323K and the fate of heavy metals was observed. The results show that both of the fly ashes were rich in Ca and Ca-compounds were the main alkaline matter which strongly affected the leaching behavior of heavy metals. Ca was mostly in the forms of Ca(OH)2 and CaCO3 in the fly ash from grate incinerator in which nascent fly ash particles were covered by Ca-compounds. In contrast, the content of Ca was lower in the fly ash from fluidized bed incinerator and Ca was mostly in the form of CaSO4. Chemical reactions among Ca-compounds caused particle agglomeration in thermal treated fly ash from grate incinerator, restraining the heavy metals volatilization. In thermal treated fly ash from fluidized bed incinerator, Ca was converted into aluminosilicates especially at 1323K which enhanced heavy metals immobilization, decreasing their volatile fractions as well as leaching concentrations. Particle agglomeration hardly affected the leaching behavior of heavy metals. However, it suppressed the leachable-CaCrO4 formation and lowered Cr leaching concentration. PMID:23800595

Hu, Hong-Yun; Liu, Huan; Shen, Wen-Qing; Luo, Guang-Qian; Li, Ai-Jun; Lu, Zhao-Ling; Yao, Hong

2013-06-22

470

Preparation, structure and bioactivity of xAu2O3·(100 - x)[P2O5·CaO] glass system  

NASA Astrophysics Data System (ADS)

Gold doped calcium phosphate glasses were prepared by the melting method. The structure of Au2O3-P2O5-CaO glasses is investigated using X-ray diffraction, infrared absorption and Raman scattering. The depth characterization of their structures is essential for the understanding of the properties of biocompatible materials. Thermal analysis DTA and TGA were also made to study behavior under different temperature regions and to see chemical changes versus time and temperature of these glasses. Bioactivity of the glasses was investigated in vitro by examining apatite formation on the surface of glasses treated in acellular simulated body fluid (SBF) with ion concentrations nearly equal to those in human blood plasma. Formation of bioactive apatite layer on the samples treated in SBF for 28 days at 37 °C was confirmed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effect of SBF soaking induces structural changes on the surface, reflected by the appearance of nano-crystalline particles agglomerated into micro-aggregates.

Regos, Adriana N.; Ardelean, I.

2011-12-01

471

NOx uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported on ?-Al2O3  

SciTech Connect

NOx uptake experiments were performed on a series of alkaline earth oxide (AEO) (MgO, CaO, SrO, BaO) on ?-alumina materials. Temperature Programmed Desorption (TPD) conducted on He flow revealed the presence of two kinds of nitrate species: i.e. bulk and surface nitrates. The ratio of these two types of nitrate species strongly depends on the nature of the alkaline earth oxide. The amount of bulk nitrate species increases with the basicity of the alkaline earth oxide. This conclusion was supported by the results of infrared and 15N solid state NMR studies of NO2 adsorption. Due to the low melting point of the precursor used for the preparation of MgO/Al2O3 material (Mg(NO3)2), a significant amount of Mg was lost during sample activation (high temperature annealing) resulting in a material with properties were very similar to that of the ?-Al2O3 support. The effect of water on the NOx species formed in the exposure of the AEO-s to NO2 was also investigated. In agreement with our previous findings for the BaO/?-Al2O3 system, an increase of the bulk nitrate species and the simultaneous decrease of the surface nitrate phase were observed for all of these materials.

Verrier, Christelle LM; Kwak, Ja Hun; Kim, Do Heui; Peden, Charles HF; Szanyi, Janos

2008-07-15

472

In-target radioactive nuclei production rates with EURISOL single-stage target configuration  

NASA Astrophysics Data System (ADS)

We calculate in-target production rates of radioactive nuclei in the case of single-stage spallation targets designed for EURISOL (European Isotope Separation On-Line Radioactive Ion Beam Facility). Using particle generation-transport codes, we estimate the isotopic distributions of the reaction products, in terms of their charge and mass numbers, for 320 configurations of cylindrical targets. For 11 elements of the highest priority (Li, Be, Ne, Mg, Ar, Ni, Ga, Kr, Sn, Hg, Fr) and 23 of their isotopes far from stability, this study helps in deciding which target configuration can be retained or discarded to reach the highest production rates.

Chabod, S. P.; David, J.-Ch.; Ene, D.; Ridikas, D.; Thiollière, N.

2010-07-01

473

Ionic liquids improved reversed-phase HPLC on-line coupled with ICP-MS for selenium speciation.  

PubMed

Room-temperature ionic liquids (RTILs) improved reversed-phase high performance liquid chromatography (RP-HPLC) on-line combined with inductively coupled plasma mass spectrometry (ICP-MS) was developed for selenium speciation. The different parameters affecting the retention behaviors of six target selenium species especially the effect of RTILs as mobile phase additives have been studied, it was found that the mobile phase consisting of 0.4% (v/v) 1-butyl-3-methylimidazolium chloride ([BMIM]Cl), 0.4% (v/v) 1-butyl-2,3-dimethylimidazolium tetrafluroborate ([BMMIM]BF(4)) and 99.2% (v/v) water has effectively improved the peak profile and six target selenium species including Na(2)SeO(3) (Se(IV)), Na(2)SeO(4) (Se(VI)), L-selenocystine (SeCys(2)), D,L-selenomethionine (SeMet), Se-methylseleno-l-cysteine (MeSeCys), seleno-D,L-ethionine (SeEt) were separated in 8 min. In order to validate the accuracy of the method, a Certified Reference Material of SELM-1 yeast sample was analyzed and the results obtained were in good agreement with the certified values. The developed method was also successfully applied to the speciation of selenium in Se-enriched yeasts and clover. For fresh Se-enriched yeast cells, it was found that the spiked SeCys(2) in living yeast cells could be transformed into SeMet. Compared with other ion-pair RP-HPLC-ICP-MS approaches for selenium speciation, the proposed method possessed the advantages including ability to regulate the retention time of the target selenium species by selecting the suitable RTILs and their concentration, simplicity, rapidness and low injection volume, thus providing wide potential applications for elemental speciation in biological systems. PMID:21147312

Chen, Beibei; He, Man; Mao, Xiangju; Cui, Ran; Pang, Daiwen; Hu, Bin

2010-10-23

474

An On-line Rotor Resistance Estimator for Induction Machine Drives  

Microsoft Academic Search

Rotor resistance variation due to changing rotor temperature is a significant issue in the design of induction motor controls. In this work, a new on-line rotor resistance estimator is proposed based on an alternate qd induction machine model which provides better mathematical representation of an induction machine than the classical qd model (which uses constant parameters). This is because the

Chun-Ki Kwon

2009-01-01

475

A novel on-line rotor resistance estimation method for vector controlled induction motor drive  

Microsoft Academic Search

This work proposed an on-line rotor resistance estimation method for the direct field oriented control of an induction motor drive. MRAS method by using the instantaneous reactive power (IRP) as models is utilized. This approach is completely robust to the stator resistance's thermal variation. Moreover, it doesn't use the pure integrator so that It has not the problems of the

Huang Bin; Qu Wenlong; Lu Haifeng

2004-01-01

476

An on-line rotor resistance estimator for induction machine drives  

Microsoft Academic Search

Rotor resistance variation due to changing rotor temperature is a significant issue in the design of induction motor controls. In this work, a new on-line rotor resistance estimator is proposed based on an alternate qd induction machine model which simultaneously includes stator leakage saturation, rotor leakage saturation, magnetizing path saturation, and distributed circuit effects in the rotor conductors. Computer simulation

Chunki Kwon; Scott D. Sudhoff

2005-01-01

477

A simple on-line method for rotor resistance updating in indirect rotor flux orientation  

Microsoft Academic Search

Rotor resistance plays a dominant role in the loss of decoupling in rotor flux indirect vector control. To maintain high performance in these drives, estimation of the rotor resistance is required to adapt the decoupling regulator against the variations of the actual rotor resistance of the motor. This paper presents a new simple method for on-line estimation of the rotor

Abdellfattah Ba-Razzouk; Pierre Sicard; Venkatachari Rajagopalan

2002-01-01

478

On line chemical composition of analyzer development. Status report, February 1, 1992--April 30, 1992  

SciTech Connect

This status report details progress made on the development of an on-line chemical analyzer. Dynamic studies of the distillation column, approval of testing plans, installation of a sample cell and raman analyzer, design of computerized control systems are described. Information on seminars and published papers is also included. (GHH)

Not Available

1992-07-01

479

User Criteria for Selection of Commercial On-Line Computer-Based Bibliographic Services  

ERIC Educational Resources Information Center

|Information culled from the literature and from the author's experience on criteria for selecting on-line computerized bibliographic services covers user needs, hardware (terminals), transmission, system and vendor, data bases, search strategy and evaluation measures, and user-system interface. (LS)|

Marshall, Doris B.

1975-01-01

480

Networks with Emphasis on Planning an On-line Bibliographic Access System  

ERIC Educational Resources Information Center

|Covered is the general nature of networks: advantages, configurations, transmission, speeds, costs and media. As a specific example of networking, planning for a national on-line medical bibliographic service is described; including network alternatives, decentralization versus communications, costs, and selection from alternatives. (3…

McCarn, D. B.

1971-01-01

481

EPIC Web Browser: On-line access to Ocean Hydrographic and Time Series Data  

NSDL National Science Digital Library

This site provides on-line access to extensive ocean observations collected by NOAA's Pacific Marine Environmental Laboratory, including hydrographic data, ocean profile data, and time series of oceanographic and near surface atmospheric parameters. The site offers catalog access, metadata, graphical displays, listings, and data download functions.

482

On-line scheduling of hard real-time tasks on variable voltage processor  

Microsoft Academic Search

We consider the problem of scheduling the mixed workload of both sporadic (on-line) and periodic (off-line) tasks on variable voltage processor to optimize power consumption while ensuring that all periodic tasks meet their deadlines and to accept as many sporadic tasks, which can be guaranteed to meet their deadlines, as possi- ble. The proposed efficient algorithms result in the scheduling

Inki Hong; Miodrag Potkonjak; Mani B. Srivastava

1998-01-01

483

Creation of On-Line Bibliographic Databases for Russian Libraries Through the Project LIBNET  

Microsoft Academic Search

After the collapse of the USSR, a new information policy was adopted by the Ministry of Culture of the Russian Federation. Russia is now interested in becoming a part of international information networks and ultimately wants to be transformed into an information society. The project LIBNET was established for building on-line bibliographic databases for the collections of the leading libraries

Amar K. Lahiri

1999-01-01

484

E-Research: An Introduction to On-line Political Science Sources for Beginners (and Skeptics)  

Microsoft Academic Search

The purpose of this review article is to contribute to monitoring and debating changes in the electronic research environment. We shall present an overview (mainly tailored to cyberspace neophytes) of some of the best electronic resources currently available on-line for political science, drawing from our experience as editors of IPSAPortal, the International Political Science Association's website dedicated to selecting and

Mauro Calise; Rosanna De Rosa

2008-01-01

485

On-line haemodiafiltration. Remarkable removal of b 2 -microglobulin. Long-term clinical observations  

Microsoft Academic Search

Background. The accumulation of b 2 -micro- meable membranes were used, AN69 and mainly poly- globulin ( b 2 -M ) in long-term dialysis patients may sulfone, and in four other patients these membranes lead to dialysis amyloidosis. In this respect, the removal were used for more than 95% of the treatment time. with different modes of on-line haemodiafiltration Therefore,

W. Lornoy; I. Becaus; J. M. Billiouw; L. Sierens; P. Van Malderen; P. D'Haenens

2000-01-01

486

A New On-Line Signature Verification Algorithm Using Variable Length Segmentation and Hidden Markov Models  

Microsoft Academic Search

In this paper, a new on-line handwritten signature verification system using Hidden Markov Model (HMM) is presented. The proposed system segments each signature based on its perceptually important points and then computes for each segment a number of features that are scale and displacement invariant. The resulted sequence is then used for training an HMM to achieve signature verification. Our

Mohammad M. Shafiei; Hamid R. Rabiee

2003-01-01

487

An on-line learning algorithm for energy efficient delay constrained scheduling over a fading channel  

Microsoft Academic Search

In this paper, we consider the problem of energy efficient scheduling under average delay constraint for a si ngle user fading channel. We propose a new approach for on-line implementation of the optimal packet scheduling algorithm. This approach is based on reformulating the value iteration equation by introducing a virtual state called post-decision state. The resultant value iteration equation becomes

Nitin Salodkar; Abhijeet Bhorkar; Abhay Karandikar; Vivek S. Borkar

2008-01-01

488

Using MotSaRT to Support On-Line Teachers in Student Motivation  

Microsoft Academic Search

Motivation to learn is affected by a student's self-efficacy, goal orientation, locus of control and perceived task difficulty. In the classroom, teachers know how to motivate their students and how to exploit this knowledge to adapt or optimize their instruction when a student shows signs of demotivation. In on-line learning environments it is much more difficult to assess the level

Teresa Hurley; Stephan Weibelzahl

2007-01-01

489

On-line active safety warning monitoring system of power equipment by microwave induction  

Microsoft Academic Search

For the deficiency of the passive warning manner of safety warning sign around the high voltage power system and a lot of electric power equipments are stole, we developed a on-line active safety warning monitoring system of power equipment by microwave induction, the device adopts microwave sensor technology to monitor the room around power equipment. When there is some objects

Jun Deng; Zhanlong Zhang; Kang Ju; Danmei Huang; XiHong Wu

2008-01-01

490

Shaft current in AC induction machine: an on line monitoring system and prediction rules  

Microsoft Academic Search

This paper looks at a method of on-line shaft current monitoring system. Fault conditions such as air gap eccentricity, slot harmonics and rotor broken bars or end ring result in asymmetrical flux pattern around the shaft, hence resulting in shaft voltage. Bearing failures can occur when the voltage level exceeds the threshold of the oil film. The importance of the

Raymond Ong; J. H. Dymond; R. D. Findlay; B. Szabados

2000-01-01

491

On-Line Efficiency Optimization of a Variable Frequency Induction Motor Drive  

Microsoft Academic Search

The problems associated with the implementation of an optimal efficiency controller in variable frequency induction motor drives are examined. A simple method for minimizing, on-line, the global system losses is presented. This method is based on the adaptive control of the rotor flux in a field-oriented drive system. The effectiveness of this control strategy is verified using digital simulation.

Daniel S. Kirschen; Donald W. Novotny; Thomas A. Lipo

1985-01-01

492

Diagnostic system for on-line detection of rotor faults in induction motor drives  

Microsoft Academic Search

? Abstract -- The paper presents an on-line condition monitoring and diagnostic system for induction motor drives. It enables detection of many different faults, which may arise during the lifetime of the motor, although special attention was devoted to identify broken rotor bars at an early stage of the fault propagation. The method is based on the analysis of stator

R. Fiser; H. Lavric; V. Ambrozic; M. Bugeza

2011-01-01

493

On-Line, Real-Time Drug Utilization Review: Evolution toward Decision Support  

Microsoft Academic Search

On-line real-time drug utilization review (ORDUR) in general, and prospective drug utilization review, specifically, have been embraced conceptually by the health care industry. To date, ORDUR has focused on the avoidance of harmful drug combinations or misuse of medications as a means of both reducing costs and preventing adverse health outcomes. Health care organizations that are responsible for prescription drug

Suzanne Agner; Stephen Groover

1996-01-01

494

On-line scheduling in metal removal processing using variable routings and control strategies  

Microsoft Academic Search

In this paper, a simulation program for the analysis of operations in a manufacturing system is presented. The simulation program is integrated using a control algorithm and a relational data model implemented on the ORACLE RDBMS into a scheduling control system. The control algorithm considers the on-line use of alternative machines tools and\\/or alternative control strategies in order to optimize

A. G. Mamalis; I Malagardis; E Pachos

1995-01-01

495

The S-Star Trial Bioinformatics Course: An On-line Learning Success  

ERIC Educational Resources Information Center

The S-Star Trial Bioinformatics on-line course (www.s-star.org) is a global experiment in bioinformatics distance education. Six universities from five continents have participated in this project. One hundred and fifty students participated in the first trial course of which 96 followed through the entire course and 70 fulfilled the overall…

Lim, Yun Ping; Hoog, Jan-Olov; Gardner, Phyllis; Ranganathan, Shoba; Andersson, Siv; Subbiah, Subramanian; Tan, Tin Wee; Hide, Winston; Weiss, Anthony S.

2003-01-01

496

On-line model selection of nonstationary time series using Gerschgorin disks  

Microsoft Academic Search

The paper proposes a method for on-line model selection of nonstationary time series. The method is based on computation of the covariance matrix of the data, transformation of the matrix by Housholder's tridiagonalization, and application of a clustering algorithm that can separate the Gerschgorin disks of the transformed covariance matrix into disks that correspond to the signals and noise, respectively.

Patrice Michelt; Jean-Yves Tourneret; Petar M. Djuric

2001-01-01

497

An on-line data acquisition system based on a NORSK DATA ND-100 computer  

NASA Astrophysics Data System (ADS)

This paper describes a data acquisition system based on CAMAC for an ND-100 computer in a multiparameter environment. It consists of several real-time tasks which share common data and are synchronised to acquire events, record on magnetic tape, perform on-line analysis and permit display of one- and two-dimensional graphs so generated.

Roy, Amitava; Dasgupta, Praba Kumar; Bandyopadhyay, Asismoy; Kumar de, Swapan

1991-06-01

498

On-Line Vibration Source Detection of Running Trains Based on Acceleration Measurement  

Microsoft Academic Search

To ensure safety of railway operation, it is important to regularly check railway conditions such as deformation of the rails. To monitor rail deformation, this paper presents a method for detecting sources of vibrations of a running train on-line by measuring accelerations, which include the train bogie's lateral acceleration, and the crossbeam's lateral and vertical accelerations. A series of detection

Chengyou Wang; Qiugen Xiao; Hua Liang; Xin Chen; Xuanping Cai; Yunhui Liu

2006-01-01

499

On-line power plant alarm and disturbance analysis system. Final report. [PWR; BWR  

Microsoft Academic Search

A methodology for on-line diagnosis of power plant disturbances has been developed, implemented, and tested. The approach is sufficiently comprehensive to enable a wide variety of disturbances to be analyzed correctly and efficiently. Cause-consequence analysis is used as the main analysis technique. The method has been implemented on commonly available process computers and integrated with a PWR training simulator. Disturbance

C. H. Meijer; B. Frogner

1980-01-01

500

On-line Development of Man-Machine Relationships: Motivation-driven Musical Interaction  

Microsoft Academic Search

This paper documents an interactive musical generative system built from minimal explicit design specifications. Given the fact that conventional, responsive rule-based systems cannot cope with large swings in context, a method of on-line development is suggested. The machine develops a dynamic motivation as to whether integrate with a musical context suggested by a human interactor, or in contrast, express a

Peter Beyls

2008-01-01