These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Human On-line Response to Target Expansion Shumin Zhai  

E-print Network

with the problem of real-estate limitation. If we want larger targets, then we will be able to display fewer items [13] (hereafter M&B). They suggested a way of facilitating pointing with no permanent spatial cost screens. Theoretically, it supports a long line of thinking in human motor control. An old theory

Zhai, Shumin

2

DEVELOPMENT AND ON-LINE TESTS OF DIFFERENT TARGET-ION SOURCE UNITS FOR PRODUCTION OF NUCLIDES FAR FROM STABILITY  

E-print Network

was the creation of the target material with a high dispersivity and porosity in order to decrease the release time of an effective, high-temperature target unit for the on-line production of short-lived rare nuclides generation ISOL facilities, where two-step reactions will be used to produce intense neutron-rich nuclear

Titov, Anatoly

3

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

4

THE FIRST TARGET ION SOURCE SYSTEM FOR THE SPIRAL PROJECT: RESULTS OF THE ON LINE TESTS  

E-print Network

source system (TISS) has been developped with the goal to produce noble gas radioactive ion beams this interaction, some radioactive atoms are created and diffuse out of the target before entering into an electron beam inside the target. The power deposition in this case is very inhomogenous and presents a sharp

Boyer, Edmond

5

Evidence for automatic on-line adjustments of hand orientation during natural reaching movements to stationary targets.  

PubMed

Control of the spatial orientation of the hand is an important component of reaching and grasping movements. We studied the contribution of vision and proprioception to the perception and control of hand orientation in orientation-matching and letter-posting tasks. In the orientation-matching task, subjects aligned a "match" handle to a "target" handle that was fixed in different orientations. In letter-posting task 1, subjects simultaneously reached and rotated the right hand to insert a match handle into a target slot fixed in the same orientations. Similar sensory conditions produced different error patterns in the two tasks. Furthermore, without vision of the hand, final hand-orientation errors were smaller overall in letter-posting task 1 than in the orientation-matching task. In letter-posting task 2, subjects first aligned their hand to the angle of the target and then reached to it with the instruction not to change their initial hand orientation. Nevertheless, hand orientation changed during reaching in a way that reduced the initial orientation errors. This did not occur when there was no explicitly defined target toward which the subjects reached (letter-posting task 3). The reduction in hand-orientation errors during reach, even when told not to change it, suggests the engagement of an automatic error correction mechanism for hand orientation during reaching movements toward stationary targets. The correction mechanism was engaged when the task involved transitive actions directed at the target object. The on-line adjustments can occur without vision of the hand and even when target orientation is defined only by proprioceptive inputs. PMID:18256170

Gosselin-Kessiby, N; Messier, J; Kalaska, J F

2008-04-01

6

An on-line learning tracking of non-rigid target combining multiple-instance boosting and level set  

NASA Astrophysics Data System (ADS)

Visual tracking algorithms based on online boosting generally use a rectangular bounding box to represent the position of the target, while actually the shape of the target is always irregular. This will cause the classifier to learn the features of the non-target parts in the rectangle region, thereby the performance of the classifier is reduced, and drift would happen. To avoid the limitations of the bounding-box, we propose a novel tracking-by-detection algorithm involving the level set segmentation, which ensures the classifier only learn the features of the real target area in the tracking box. Because the shape of the target only changes a little between two adjacent frames and the current level set algorithm can avoid the re-initialization of the signed distance function, it only takes a few iterations to converge to the position of the target contour in the next frame. We also make some improvement on the level set energy function so that the zero level set would have less possible to converge to the false contour. In addition, we use gradient boost to improve the original multi-instance learning (MIL) algorithm like the WMILtracker, which greatly speed up the tracker. Our algorithm outperforms the original MILtracker both on speed and precision. Compared with the WMILtracker, our algorithm runs at a almost same speed, but we can avoid the drift caused by background learning, so the precision is better.

Chen, Mingming; Cai, Jingju

2013-10-01

7

Miniaturized DNA aptamer-based monolithic sorbent for selective extraction of a target analyte coupled on-line to nanoLC.  

PubMed

A complete characterization of a novel target-specific DNA aptamer-based miniaturized solid phase extraction (SPE)-sorbent coupled on-line to nanoLC is presented. A miniaturized oligosorbent (mOS) was prepared via the in situ sol-gel synthesis of a hybrid organic-inorganic monolith in 100 ?m i.d. capillary columns using tetraethoxysilane and 3-aminopropyltriethoxysilane as precursors, followed by covalent binding of a 5'-amino-modified DNA aptamer with a C12 spacer arm specific for a molecule of small molecular weight. Ochratoxin A (OTA), one of the most abundant naturally occurring mycotoxins, was chosen as model analyte to demonstrate the principle of such an approach. The mOS was coupled on-line to RP-nanoLC-LIF. Selective extraction of OTA on several mOSs was demonstrated with an average extraction recovery above 80 % when percolating spiked binding buffer and a low recovery on control monoliths grafted with a non-specific aptamer. Reproducibility of mOSs preparation was highlighted by comparing extraction yields. Otherwise, the mOSs demonstrated no cross-reactivity towards an OTA structural analogue, i.e., ochratoxin B. Due to the high specific surface area of the hybrid silica-based monolith, the coverage density of DNA aptamers covalently immobilized in the capillaries was very high and reached 6.27 nmol ?L(-1), thus leading to a capacity above 5 ng of OTA. This miniaturized device was then applied to the selective extraction of OTA from beer samples. It revealed to be effective in isolating OTA from this complex matrix, thus improving the reliability of its analysis at the trace level. PMID:25335821

Brothier, Fabien; Pichon, Valérie

2014-12-01

8

On-Line Use of Three-Dimensional Marker Trajectory Estimation From Cone-Beam Computed Tomography Projections for Precise Setup in Radiotherapy for Targets With Respiratory Motion  

SciTech Connect

Purpose: To develop and evaluate accurate and objective on-line patient setup based on a novel semiautomatic technique in which three-dimensional marker trajectories were estimated from two-dimensional cone-beam computed tomography (CBCT) projections. Methods and Materials: Seven treatment courses of stereotactic body radiotherapy for liver tumors were delivered in 21 fractions in total to 6 patients by a linear accelerator. Each patient had two to three gold markers implanted close to the tumors. Before treatment, a CBCT scan with approximately 675 two-dimensional projections was acquired during a full gantry rotation. The marker positions were segmented in each projection. From this, the three-dimensional marker trajectories were estimated using a probability based method. The required couch shifts for patient setup were calculated from the mean marker positions along the trajectories. A motion phantom moving with known tumor trajectories was used to examine the accuracy of the method. Trajectory-based setup was retrospectively used off-line for the first five treatment courses (15 fractions) and on-line for the last two treatment courses (6 fractions). Automatic marker segmentation was compared with manual segmentation. The trajectory-based setup was compared with setup based on conventional CBCT guidance on the markers (first 15 fractions). Results: Phantom measurements showed that trajectory-based estimation of the mean marker position was accurate within 0.3 mm. The on-line trajectory-based patient setup was performed within approximately 5 minutes. The automatic marker segmentation agreed with manual segmentation within 0.36 {+-} 0.50 pixels (mean {+-} SD; pixel size, 0.26 mm in isocenter). The accuracy of conventional volumetric CBCT guidance was compromised by motion smearing ({<=}21 mm) that induced an absolute three-dimensional setup error of 1.6 {+-} 0.9 mm (maximum, 3.2) relative to trajectory-based setup. Conclusions: The first on-line clinical use of trajectory estimation from CBCT projections for precise setup in stereotactic body radiotherapy was demonstrated. Uncertainty in the conventional CBCT-based setup procedure was eliminated with the new method.

Worm, Esben S., E-mail: esbeworm@rm.dk [Department of Oncology, Aarhus University Hospital, Aarhus (Denmark); Department of Medical Physics, Aarhus University Hospital, Aarhus (Denmark); Hoyer, Morten; Fledelius, Walther [Department of Oncology, Aarhus University Hospital, Aarhus (Denmark); Nielsen, Jens E.; Larsen, Lars P. [Department of Radiology, Aarhus University Hospital, Aarhus (Denmark); Poulsen, Per R. [Department of Oncology, Aarhus University Hospital, Aarhus (Denmark); Institute of Clinical Medicine, Aarhus University (Denmark)

2012-05-01

9

Computer assisted orthopaedic surgery -- CAOS.  

PubMed

The use of computer navigation in orthopedic surgery allows for real time intraoperative feedback resulting in higher precision of bone cuts, better alignment of implants and extremities, easier fracture reductions, less radiation and better documentation than what is possible in classical orthopaedic procedures. There is no need for direct and repeated visualization of many anatomical landmarks (classical method) in order to have good intraoperative orientation. Navigation technology depicts anatomy and position of "smart tools" on the screen allowing for high surgical precision (smaller number of outliers from desired goal) and with less soft tissue dissection (minimally invasive surgery - MIS). As a result, there are more happy patients with less pain, faster recovery, better functional outcome and well positioned, long lasting implants. In general, navigation cases are longer on the average 10 to 20 minutes, special training is required and equipment is relatively expensive. CAOS applications in knee and hip joint replacement are discussed. PMID:16533171

Kanli?, Enes M; Delarosa, Fabian; Pirela-Cruz, Miguel

2006-02-01

10

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."

1994-01-01

11

Tech OnLine  

NSDL National Science Digital Library

Tech OnLine is a veritable haven for electronics engineers and information technology professionals. After completing the free registration process, users have access to live and archived Web casts, online courses, and technical papers. An example of the roughly hour-long Web casts is a touchscreen liquid crystal display design, but this is just one area of many. The site is continually updated with feature articles that cover many different hot topics, including a recent look at fourth generation wireless communications. A discussion forum is also available, but it does not seem to be very active.

1996-01-01

12

WHO's WHO On-Line  

NSDL National Science Digital Library

WHO's WHO On-Line (first edition) is a collective experiment towards a HYPERbiographical database of people in the Internet. Anyone can submit a listing for themselves, and listings are organized by profession or discipline. Listings can reside on your WWW, Gopher, or FTP server.

13

Dirio de Notcias -Principal Apago informtico no metro lana caos  

E-print Network

Diário de Notícias - Principal Apagão informático no metro lança caos em Lisboa Autor: Luís Fontes parcial #12;Diário de Notícias - Principal Apagão informático no metro lança caos em Lisboa Autor: Luís reprodução, mesmo que parcial #12;Diário de Notícias - Principal Apagão informático no metro lança caos em

Instituto de Sistemas e Robotica

14

Volcanoes: On-Line Edition  

NSDL National Science Digital Library

This is the on-line version of a general interest publication prepared by the United States Geological Survey (USGS). It provides a general introduction to volcanoes and volcanology. Topics include types of volcanoes; types of eruptions; submarine volcanoes; and features associated with volcanic terrains (geysers, hot springs, etc.). There is also discussion of volcanoes and their association to plate tectonics, extraterrestrial volcanoes, monitoring and research efforts, and the impacts of volcanoes on human populations. A text-only version is also available.

15

Antimicrobial Principles of Xian he cao (Agrimonia pilosa).  

PubMed

From the antimicrobially active extract of the Chinese crude drug, Xian he cao ( AGRIMONIA PILOSA Ledb.), four active compounds were isolated. They were all phloroglucinol derivatives and their structures were elucidated on the basis of spectroscopic data. PMID:17262333

Yamaki, M; Kashihara, M; Ishiguro, K; Takagi, S

1989-04-01

16

Development and applications of an on-line thermal neutron prompt-gamma element analysis system  

Microsoft Academic Search

This paper introduces the principles, instrumentation, implementation, and industrial applications of an on-line thermal neutron prompt-gamma element analysis system (using a252Cf neutron source, Am–Be neutron source, or neutron generator). The energy resolution of the system at the H prompt-gamma full-energy photopeak (2.22325 MeV) is 3.6 keV. The concentration measurement error of Al2O3, FeO3, CaO, and SiO2 is ±0.3%, ±0.1%, ±0.4%,

Liu Yuren; Lu Yanxin; Xie Yali; Wang Yonghai; Du Youling; Tan Jin; Meng Bonian; R. S. Seymour

1991-01-01

17

Best Practices for On-line Delivery  

E-print Network

1 Best Practices for On-line Delivery Stephen Edwards Dept. of Computer Science, Virginia Tech comes first: Learning goals Activities and assignments BEST PRACTICES FOR ON-LINE DELIVERY Activities-LINE DELIVERY 100% on-line course: Paperless, all electronic No face-to-face meetings Weekly Centra meetings

Edwards, Stephen H.

18

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...

19

Metrology from Vertical Objects Xiaochun Cao and Hassan Foroosh  

E-print Network

Metrology from Vertical Objects Xiaochun Cao and Hassan Foroosh School of Computer Science-parallel lines. 1 Introduction Metrology from uncalibrated images is becoming of increasing interest for many, Criminisi et al. [3] proposed an approach for single view metrology, and showed that affine scene structure

Foroosh, Hassan

20

Competitive algorithms for on-line problems  

Microsoft Academic Search

An on-line problem is one in which an algorithm must handle a sequence of requests, satisfying each request without knowledge of the future requests. Examples of on-line problems include scheduling the motion of elevators, finding routes in networks, allocating cache memory, and maintaining dynamic data structures. A competitive algorithm for an on-line problem has the property that its performance on

Mark S. Manasse; Lyle A. McGeoch; Daniel Dominic Sleator

1988-01-01

21

On-line monitoring of incinerator emissions  

SciTech Connect

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 long-path cell. Eleven target compounds were simultaneously analyzed: methane, toluene, chlorobenzene, 1,1,1-trichloroethane, trichloroethylene, benzene, ethylene, hydrogen chloride, carbon monoxide, carbon dioxide, and water. During the testing, the incinerator temperature and the excess air ratio were deliberately changed to simulate both complete and incomplete combustion conditions in the incinerator. Test results indicate that the FTIR/LPC system can successfully follow concentration changes in the emissions that are associated with the change in the incinerator operations. In addition to carbon monoxide, methane, ethylene, and benzene have been found to be major products of incomplete combustion of the mixture. In this paper, the authors also discuss problems related to obtaining representative calibration standards and to developing adequate methods for continuous monitoring of emissions.

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

1993-07-01

22

On-line diagnosis of sequential systems  

NASA Technical Reports Server (NTRS)

A model for on-line diagnosis was investigated for discrete-time systems, and resettable sequential systems. Generalized notions of a realization are discussed along with fault tolerance and errors. Further investigation into the theory of on-line diagnosis is recommended for three levels: binary state-assigned level, logical circuit level, and the subsystem-network level.

Sundstrom, R. J.

1973-01-01

23

Accurate On-line Support Vector Regression  

Microsoft Academic Search

Batch implementations of support vector regression (SVR) are inefé cient when used in an on-line setting because they must be retrained from scratch every time the training set is modié ed. Following an incremen- tal support vector classié cation algorithm introduced by Cauwenberghs and Poggio (2001), we have developed an accurate on-line support vec- tor regression (AOSVR) that efé ciently

Junshui Ma; James Theiler; Simon Perkins

2003-01-01

24

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

25

Computer-Assisted Orthopedic Surgery (CAOS): Pros and Cons  

Microsoft Academic Search

\\u000a Computer-assisted orthopedic surgery (CAOS) has recently evolved as an important technical application that has offered substantial\\u000a improvements over conventional instrumented methods. The possibility of using computers in total joint replacement surgery\\u000a is not a recent discovery, as Bargar and Paul introduced the first successful robotic application for total hips in 1987.1 Their system was a development effort with IBM, which

James B. Stiehl

26

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

27

On Line Power Plant Performance Monitoring  

E-print Network

ON LINE POWER PLANT PERFORMANCE MONITORING DAVID J. AHNER Manager, Power PrOduction Engineering Power Technologies, Inc. Schenectady, NY ABSTRACT Maintaining efficient and reliable plant operation is a prime objective in the generation... of power. These are important considerations for utilities and particularly for Independent Power Producers as they become a more significant factor in the energy supply. On Line Performance Monitoring is an effective method to improve operating...

Ahner, D. J.; Priestley, R. R.

28

Fast on-line integer multiplication  

Microsoft Academic Search

A Turing machine multiplies on-line if it receives its inputs low order digits first and it produces the k-th output digit before reading in the (k+1)-st inputs. We present a general method for converting any off-line multiplication algorithm which forms the product of two n-bit binary numbers in time F(n) into an on-line method, and the new algorithm requires time

Michael J. Fischer; Larry J. Stockmeyer

1973-01-01

29

On-line handwritten text categorization  

NASA Astrophysics Data System (ADS)

As new innovative devices, accepting or producing on-line documents, emerge, managing facilities for these kinds of documents such as topic spotting are required. This means that we should be able to perform text categorization of on-line documents. The textual data available in on-line documents can be extracted through online recognition, a process which produces noise, i.e. errors, in the resulting text. This work reports experiments on categorization of on-line handwritten documents based on their textual contents. We analyze the effect of the word recognition rate on the categorization performances, by comparing the performances of a categorization system over the texts obtained through on-line handwriting recognition and the same texts available as ground truth. Two categorization algorithms (kNN and SVM) are compared in this work. A subset of the Reuters-21578 corpus consisting of more than 2000 handwritten documents has been collected for this study. Results show that accuracy loss is not significant, and precision loss is only significant for recall values of 60%-80% depending on the noise levels.

Peña Saldarriaga, Sebastián; Viard-Gaudin, Christian; Morin, Emmanuel

2009-01-01

30

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

31

On-Line Construction of Suffix Trees  

Microsoft Academic Search

Abstract: An on-line algorithm is presented for constructing the suffix tree for a given string in time linear in the length of the string. The new algorithm has the desirable property of processing the string symbol by symbol from left to right. It has always the suffix tree for the scanned part of the string ready. The method is developed

Esko Ukkonen

1995-01-01

32

LUST ON-LINE CALCULATOR INTRODUCTION  

EPA Science Inventory

EPA has developed a suite of on-line calculators to assist in performing site assessment and modeling calculations for leaking underground storage tank sites (http://www.epa.gov/athens/onsite). The calculators are divided into four types: parameter estimation, models, scientific...

33

Competitive Optimal On-Line Leasing  

Microsoft Academic Search

Consider an on-line player who needs some equipment (e.g., a computer) for an initially unknown number of periods. At the start of each period it is determined whether the player will need the equipment during the current period and the player has two options: to pay a leasing fee c and rent the equipment for the period, or to buy

Ran El-yaniv; R. Kaniel; Nathan Linial

1999-01-01

34

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...

35

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...

36

Kinetic Study on Desulfurization of Hot Metal Using CaO and CaC2  

NASA Astrophysics Data System (ADS)

The kinetics and reaction mechanisms of hot metal desulfurization using CaO and CaC2 were studied in a well-controlled atmosphere with a lab scale high temperature furnace. The growths of CaS around CaO and CaC2 were measured and compared at 1773 K (1500 °C). The parabolic rate constant was evaluated to be 5 × 10-7 (cm s-1) on CaO particles, and 2.4 × 10-7 (cm s-1) on CaC2. The bigger parabolic constant of CaO resulted in more efficient desulfurization. Agglomerates and big CaO particles led to 2CaO·SiO2 formation which hindered further utilization of CaO for desulfurization. The 2CaO·SiO2 formation was favoured by a high oxygen potential. Since the desulfurization reaction of CaO not only produced CaS but also oxygen, the local oxygen concentration around big CaO particles was higher than around small particles.

Lindström, David; Sichen, Du

2015-02-01

37

On-line handwriting analysis using wavelets  

NASA Astrophysics Data System (ADS)

Speech and Handwriting interfaces to computing devices have received increased attention recently as alternate human-computer media. Automatic recognition of unconstrained handwritten text must be provided as a capability in handwriting computer interfaces. Variation in writing styles of a single writer at different times and between multiple writers makes unconstrained on-line handwriting recognition a challenging task. On-line handwriting is recorded as a sequence of coordinates as the writer's pen moves along the recording device. Isolated character and word recognition have been addressed by several researchers. More recently, attention has been focussed on the recognition of unconstrained text streams. The dynamic changes in handwriting styles observed in everyday use requires development of methods that are adaptive to local variations. We present a novel application of wavelet-based analysis of pen position, velocity and acceleration time-sequences for segmentation and recognition of text components.

Srikantan, Geetha; Srihari, Rohini K.

1995-09-01

38

Electronic Energy Transfer on CaO Surfaces  

SciTech Connect

We excite low-coordinated surface sites of nanostructured CaO samples using tunable UV laser pulses and observe hyperthermal O-atom emission indicative of an electronic excited-state desorption mechanism. The O-atom yield increases dramatically with photon energy, between 3.75 and 5.4 eV, below the bulk absorption threshold. The peak of the kinetic energy distribution does not increase with photon energy in the range 3.9 to 5.15 eV. These results are analyzed in the context of a laser desorption model developed previously for nanostructured MgO samples. The data are consistent with desorption induced by exciton localization at corner-hole trapped surface sites following either direct corner excitation or diffusion and localization of excitons from higher coordinated surface sites.

Joly, Alan G.; Beck, Kenneth M.; Hess, Wayne P.

2008-09-28

39

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

40

Condenser on-line fouling monitor  

SciTech Connect

Biological and/or chemical fouling in utility condensers is a major cause of reduced efficiency and substantially affects availability and increases operational costs. Performance losses due to water side fouling are difficult to measure and, usually, quantitative assessment of the economic impact of condenser fouling is impossible. Plant operators typically examine steam backpressure and perform complex calculations for condenser cleanliness. These direct estimates are often imprecise due to inadequate instrumentation. In addition, these data provide information on overall condenser performance which may be influenced by a number of parameters which are independent of water side fouling. Indirect (side-stream) methods are also used to isolate/measure biological or chemical fouling in condensers. This approach is extremely useful to document site/seasonal fouling rates, and for the simultaneous evaluation of treatment options. In collaboration with the Electric Power Research Institute, instrumentation has been developed which meets requirements for the direct, on-line measurement of condenser fouling. This monitor may be installed in any location within the condenser, does not interfere with routine plant operations, including on-line mechanical and chemical treatment methods, and provides continuous, real-time readings of the heat transfer efficiency of the instrumented tube. Three prototype assemblies were installed at the New England Power Company, Brayton Point Generating Station in 1993. This paper discusses the design, construction, preliminary test results, and subsequent data collected in 1994 with a redesigned system.

Tsou, J.L. [Electric Power Research Inst., Palo Alto, CA (United States); Garey, J.F. [Bridger Scientific, Inc., Sandwich, MA (United States); Wiebe, D.H. [Marine Biocontrol Corp., Sandwich, MA (United States)

1994-12-31

41

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

42

Strain effects in low-dimensional transition metal oxides Jinbo Cao a,b,  

E-print Network

Strain effects in low-dimensional transition metal oxides Jinbo Cao a,b, *, Junqiao Wu a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 1.1. Spin­lattice­charge coupling in transition metal oxides

Wu, Junqiao

43

Nonisothermal Thermogravimetric Analysis of Thai Lignite with High CaO Content  

PubMed Central

Thermal behaviors and combustion kinetics of Thai lignite with different SO3-free CaO contents were investigated. Nonisothermal thermogravimetric method was carried out under oxygen environment at heating rates of 10, 30, and 50°C min?1 from ambient up to 1300°C. Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods were adopted to estimate the apparent activation energy (E) for the thermal decomposition of these coals. Different thermal degradation behaviors were observed in lignites with low (14%) and high (42%) CaO content. Activation energy of the lignite combustion was found to vary with the conversion fraction. In comparison with the KAS method, higher E values were obtained by the FWO method for all conversions considered. High CaO lignite was observed to have higher activation energy than the low CaO coal. PMID:24250259

Pintana, Pakamon

2013-01-01

44

Sensitivity Analysis of Discrete Stochastic Systems Rudiyanto Gunawan,* Yang Cao,y  

E-print Network

Sensitivity Analysis of Discrete Stochastic Systems Rudiyanto Gunawan,* Yang Cao,y Linda Petzold, University of California, Santa Barbara, California ABSTRACT Sensitivity analysis quantifies the dependence of system behavior on the parameters that affect the process dynamics. Classical sensitivity analysis

Cao, Yang

45

An on-line dynamic security analysis system implementation  

SciTech Connect

On-line dynamic security analysis has recently become realistic due to advances in analytical techniques and computer technology. This paper presents experience from implementation of the on-line transient stability analysis system at the BC Hydro control center. Implementation of that on-line system was conceived as part of a broader on-line dynamic security analysis system. As a description of what is believed to be the first implementation of a full-scale on-line transient stability analysis, this paper provides insight into the design and evolution of on-line dynamic security analysis.

Demaree, K.; Athay, T.; Cheung, K.W. (ESCA Corp., Bellevue, WA (United States)); Mansour, Y.; Vaahedi, E.; Chang, A.Y.; Corns, B.R.; Garrett, B.W. (British Columbia Hydro, Vancouver, British Columbia (Canada))

1994-11-01

46

On-line process control monitoring system  

SciTech Connect

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, Patrick E. (Martinez, GA); Van Hare, David R. (Aiken, SC); Prather, William S. (Augusta, GA)

1992-01-01

47

NASDA's Advanced On-Line System (ADOLIS)  

NASA Technical Reports Server (NTRS)

Spacecraft operations including ground system operations are generally realized by various large or small scale group work which is done by operators, engineers, managers, users and so on, and their positions are geographically distributed in many cases. In face-to-face work environments, it is easy for them to understand each other. However, in distributed work environments which need communication media, if only using audio, they become estranged from each other and lose interest in and continuity of work. It is an obstacle to smooth operation of spacecraft. NASDA has developed an experimental model of a new real-time operation control system called 'ADOLIS' (ADvanced On-Line System) adopted to such a distributed environment using a multi-media system dealing with character, figure, image, handwriting, video and audio information which is accommodated to operation systems of a wide range including spacecraft and ground systems. This paper describes the results of the development of the experimental model.

Yamamoto, Yoshikatsu; Hara, Hideo; Yamada, Shigeo; Hirata, Nobuyuki; Komatsu, Shigenori; Nishihata, Seiji; Oniyama, Akio

1993-01-01

48

On-line Resources for Xenopus  

PubMed Central

Summary Since the advent of computational methods in biology the quantity of biological data has grown exponentially. These data support genomic, genetic, developmental, and other forms of biological experimentation. The number of on-line resources has kept pace with the growth in data. Xenopus has perhaps lagged some of the other model organisms in developing resources but is now quickly catching up. There are now a number of well-established and developing resources for Xenopus. This chapter looks beyond the widely-known public databases, Genbank and the EBI, and describes how the researcher can use a number of central sites such as Xenbase, UniProtKB, and major genome browsers to navigate to a variety of different resources. PMID:22956109

Bowes, Jeff

2015-01-01

49

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

50

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

51

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

52

Therapeutics, Targets, and Chemical Biology Small-Molecule Anticancer Compounds Selectively Target  

E-print Network

the Hemopexin Domain of Matrix Metalloproteinase-9 Antoine Dufour1,2 , Nicole S. Sampson2 , Jian Li1 , Cem Kuscu1,6 , and Jian Cao1 Abstract Lack of target specificity by existing matrix metalloproteinase (MMP the role of matrix metalloproteinases (MMP) in early aspects of cancer dissemination (1­3). The demonstra

Rizzo, Robert C.

53

INNOVATIVE CONCEPTS FOR ON-LINE SYNCHRONOUS GENERATOR PARAMETER ESTIMATION  

E-print Network

INNOVATIVE CONCEPTS FOR ON-LINE SYNCHRONOUS GENERATOR PARAMETER ESTIMATION by Elias Kyriakides FOR ON-LINE SYNCHRONOUS GENERATOR PARAMETER ESTIMATION by Elias Kyriakides has been approved December ABSTRACT A method to identify synchronous generator parameters from on-line measurements is presented

54

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

55

On-line evaluation of multiloop digital controller performance  

NASA Technical Reports Server (NTRS)

The purpose of this presentation is to inform the Guidance and Control community of capabilities which were developed by the Aeroservoelasticity Branch to evaluate the performance of multivariable control laws, on-line, during wind-tunnel testing. The capabilities are generic enough to be useful for all kinds of on-line analyses involving multivariable control in experimental testing. Consequently, it was decided to present this material at this workshop even though it has been presented elsewhere. Topics covered include: essential on-line analysis requirements; on-line analysis capabilities; on-line analysis software; frequency domain procedures; controller performance evaluation frequency-domain flutter suppression; and plant determination.

Wieseman, Carol D.

1993-01-01

56

ChemScan—an on-line ultraviolet spectral process analyzer  

NASA Astrophysics Data System (ADS)

ChemScan is a product line of ultraviolet, on-line process analyzers that grew out of a NASA SBIR program targeted at on-line monitoring of plant nutrient solutions as part of the NASA CELSS program. The original goal for NASA was to provide on-line measurement of all the hydroponic plant nutrients necessary to develop and maintain a plant growth facility in space. Two different spectrometric techniques were applied to provide on-line measurements of all plant nutrients. One technology, ultraviolet absorption spectrometry, provided on-line measurements of nitrate, iron, and some of the transition metal nutrients. This technology not only demonstrated a capability to meet these CELSS needs but has now been incorporated into a family of commercial analytical instruments used for environmental process monitoring and control applications. A second technology, Liquid Atomic Emission Spectrometry (LAES), also originated in this same NASA SBIR, is still at an earlier stage of development and is expected to reach the market in the next 18-24 months.

Beemster, Bernard J.; Schlager, Kenneth J.

1996-03-01

57

[Quantitative estimation of CaO content in surface rocks using hyperspectral thermal infrared emissivity].  

PubMed

The objective of the present paper is to study the quantitative relationship between the CaO content and the thermal infrared emissivity spectra. The surface spectral emissivity of 23 solid rocks samples were measured in the field and the first derivative of the spectral emissivity was also calculated. Multiple linear regression (MLR), principal component analysis (PCR) and partial least squares regression (PLSR) were modeled and the regression results were compared. The results show that there is a good relationship between CaO content and thermal emissivity spectra features; emissivities become lower when CaO content increases in the 10.3-13 mm region; the first derivative spectra have a better predictive ability compared to the original emissivity spectra. PMID:22242490

Zhang, Li-Fu; Zhang, Xue-Wen; Huang, Zhao-Qiang; Yang, Hang; Zhang, Fei-Zhou

2011-11-01

58

Thermodynamics of strained vanadium dioxide single crystals Yijia Gu, Jinbo Cao, Junqiao Wu, and Long-Qing Chen  

E-print Network

Thermodynamics of strained vanadium dioxide single crystals Yijia Gu, Jinbo Cao, Junqiao Wu;Thermodynamics of strained vanadium dioxide single crystals Yijia Gu,1,a Jinbo Cao,2 Junqiao Wu,2 and Long Vanadium dioxide undergoes a metal­insulator transition, in which the strain condition plays an important

Chen, Long-Qing

59

Oxide nanowires for solar cell applications Qifeng Zhang, Supan Yodyingyong, Junting Xi, Daniel Myers and Guozhong Cao*  

E-print Network

to the electron collecting electrode. Such an enhancement effect could be further boosted while the nanowires were has published over 100 papers and book chapters. Guozhong Cao Guozhong Cao, PhD, is Boeing- Steiner at the University of Washington. He has published over 280 refereed papers and authored and edited 5 books including

Cao, Guozhong

60

April 13, 2012 Insect Collection On-Line Database "Infomercial"  

E-print Network

1 April 13, 2012 Insect Collection On-Line Database "Infomercial" By Nico Franz & Sangmi Lee Since February, 2012, ASU's Insect Collection has an on-line platform for specimen-level data and consistency. #12;5 7. Specimen Images and Descriptions Symbiota has options to document specimen attributes

Franz, Nico M.

61

On-Line Administrative Information Systems: A Case Study.  

ERIC Educational Resources Information Center

A case study approach is used to document the on-line information system developed by the Office of Management Information and Computing at the University of Vermont. Stanford University's Project INFO On-Line Administration Information System, OASIS, was chosen as a model. The administrative system is one of two on campus, the other designed for…

Sire, Paul W.

62

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

63

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

64

Student and Tutor Perspectives of On-Line Moderation  

ERIC Educational Resources Information Center

Purpose: The on-line tutor or e-moderator faces a diversity of new challenges, including instructional design, organisation, direct instruction and facilitating discourse. This study aims to contrast the views of students and tutors regarding what factors constitute effective e-moderation in order to identify key attributes of an on-line tutor.…

Packham, Gary; Jones, Paul; Thomas, Brychan; Miller, Christopher

2006-01-01

65

Monitoring machine operations using on-line sensors  

Microsoft Academic Search

Monitoring machine operations and production process conditions using on-line sensors has drawn increasing attention recently. In this paper, we discuss a situation where an on-line sensor is used to monitor a randomly deteriorating machine operation. The machine condition is described by a finite number of states, and the machine deterioration follows a Markov process. It is assumed that the sensor

Linguo Gong; Kwei Tang

1997-01-01

66

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.

67

Linear theory for optimal control of molecular wave packets Jianshu Cao and Kent R. Wilson  

E-print Network

Linear theory for optimal control of molecular wave packets Jianshu Cao and Kent R. Wilson proposals for the quantum control of matter have been suggested 1­7 , among which optimal control theory has-0339 Received 14 August 1996 A linear theory for optimizing optical fields to achieve a molecular configuration

Cao, Jianshu

68

Relating theories of actions and reactive control Chitta Baral and Tran Cao Son  

E-print Network

Relating theories of actions and reactive control Chitta Baral and Tran Cao Son Department In this paper 1 we give a formal characterization of reactive control using ac­ tion theories. In the process we provenly correct control modules. We then extend our approach to action theories and control modules

Baral, Chitta

69

The Cracking Experiment Research of Tar by CaO Catalyst  

NASA Astrophysics Data System (ADS)

The tar from rice husk gasification for power generation was taken as an example to be catalytically cracked by CaO catalyst. The experimental results showed the cracking efficiency of tar greatly increased from 28.66% by thermal cracking to 65.6% by catalytic cracking, the gas compositions from tar being cracked were H2, CO, CH4, and CO2, and the H2 was a majority of them. The DSC and XRT analysis revealed that the deposit carbon could be found after tar was catalytically cracked and the deposit carbon efficiency could reach 30.51%. The SEM photographs of CaO catalyst used as catalyst showed that the CaO catalyst was enwrapped by the deposit carbon and decreased its catalytic activity, at the same time, the pressure drop of gas passing through catalyst bed increased because of the deposit carbon, it was different for us to operate the cracking reactor of tar and CaO catalyst in the cracking reactor must be regenerated for its stable operation.

Lit, X. H.; Mi, T.; We, Z. S.; Chen, Y. F.; Wu, Q. X.

70

-closure, -closure and generalized closed sets J. Cao, M. Ganster, I. Reilly and M. Steiner  

E-print Network

-closure, -closure and generalized closed sets J. Cao, M. Ganster, I. Reilly and M. Steiner space via the associated -closure and -closure. The relationships among these new classes and existing and Preliminaries Let (X, ) be a topological space. Recall that a point x X is said to be in the -closure (resp

Ganster, Maximilian

71

Strong, Ductile Magnesium-Zinc Nanocomposites MICHAEL DE CICCO, HIROMI KONISHI, GUOPING CAO, HONG SEOK CHOI,  

E-print Network

of materials synthesis and processing. Most metal matrix nanocomposites (MMNCs) to date are made with expensiveStrong, Ductile Magnesium-Zinc Nanocomposites MICHAEL DE CICCO, HIROMI KONISHI, GUOPING CAO, HONG that the MgZn2 formation resulted in elimination of other intermetallics in the Mg-4Zn nanocomposite

Lakes, Roderic

72

Sensor Relocation in Mobile Sensor Networks Guiling Wang, Guohong Cao, Tom La Porta, and Wensheng Zhang  

E-print Network

Sensor Relocation in Mobile Sensor Networks Guiling Wang, Guohong Cao, Tom La Porta, and Wensheng of research on using mobility in sensor networks to assist in the initial deployment of nodes. Mobile sensors nodes such as small size and low cost, sensor networks [10], [13], [15], [17], [1] have become adopted

Zhang, Wensheng

73

Dynamics of condensation in totally asymmetric inclusion process Jiarui Cao, Paul Chleboun and Stefan Grosskinsky  

E-print Network

Dynamics of condensation in totally asymmetric inclusion process Jiarui Cao, Paul Chleboun inclusion process (TASIP) Dynamics of condensation Two condensates interaction Conclusion and further work Condensation phenomenon is said to occur when a finite fraction of the total quantity (particles, mass, wealth

Sengun, Mehmet Haluk

74

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

75

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...

76

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...

77

3D Fingerprint Phantoms Sunpreet S. Arora, Kai Cao and Anil K. Jain  

E-print Network

3D Fingerprint Phantoms Sunpreet S. Arora, Kai Cao and Anil K. Jain Department of Computer Science data. To overcome this limitation, use of a large number of 2D synthetic fingerprints for evaluating fingerprint systems had been proposed. However, the utility of 2D synthetic fingerprints is limited

78

METROLOGY IN UNCALIBRATED IMAGES GIVEN ONE VANISHING POINT Hassan Foroosh Xiaochun Cao Murat Balci  

E-print Network

METROLOGY IN UNCALIBRATED IMAGES GIVEN ONE VANISHING POINT Hassan Foroosh Xiaochun Cao Murat Balci in the perspective images. 1. INTRODUCTION Metrology from uncalibrated images is becoming of increas- ing interest al. [3] proposed an approach for single view metrology, and showed that affine scene structure can

Foroosh, Hassan

79

Can Facial Metrology Predict Gender? Deng Cao, Cunjian Chen, Marco Piccirilli,  

E-print Network

Can Facial Metrology Predict Gender? Deng Cao, Cunjian Chen, Marco Piccirilli, Donald Adjeroh the question of whether facial metrology can be exploited for reliable gender prediction. A new method based solely on metrological information from fa- cial landmarks is developed. Here, metrological features

Ross, Arun Abraham

80

La Zona Franca y su caos DesirDesir GmezGmez TorrentTorrent  

E-print Network

La Zona Franca y su caos DesiréDesiré GàmezGàmez TorrentTorrent #12;ESTRUCTURAESTRUCTURA 1. Conclusiones4. Conclusiones #12;¿Cual es el sustrato?¿Cual es el sustrato? Linea 9: Foneria de 48-51 m

Politècnica de Catalunya, Universitat

81

Stability Analysis of Three-Dimensional Colloidal Domains: Quadratic Fluctuations Jianlan Wu and Jianshu Cao*  

E-print Network

and Jianshu Cao* Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts-assemble in a charged colloidal suspension with competing short- range attraction and long-range Yukawa repulsion thermodynamic properties of domains in charged colloidal suspensions, analytical calculations are complicated

Cao, Jianshu

82

Effective pair potential for Ca-O bonds in CaGeO3 polymorphs  

NASA Astrophysics Data System (ADS)

The CaGeO3 perovskite and garnet were synthesized in a cubic anvil type apparatus under high pressure. The measurements of Ca and Ge K- edge XAFS spectra were carried out in the transmission mode at temperature up to 700 K. The effective pair potentials V(u)=?u2/2+?u3/3!, for Ca-O bond in various phases of CaGeO3 have been investigated by the temperature dependence of EXAFS Debye-Waller factors. The potential coefficient ? for the Ca-O bond in perovskite-type CaGeO3 is small, 4.4 eV/Å2 compared with those in garnet (6.0 eV/Å2) and wollastonite (6.4 eV/Å2). The potential for Ca-O bond in perovskite is broader than those in other CaGeO3 polymorphs, which is one reason for the Clausius-Clapeyron's curve for perovskite-garnet phase boundary having a negative slope. The potential coefficients for the Ca-O in perovskite are significantly smaller than those for the longer Ge-Ge distances as the framework vibration though the potential coefficient decreases usually as a result of the larger bond distance.

Koganemaru, A.; Yoshiasa, A.; Wang, L.; Nakatani, T.; Nakatsuka, A.; Okube, M.; Arima, H.; Sugiyama, K.

2013-04-01

83

Evaluation of biological cell properties using dynamic indentation measurement Guoxin Cao* and Namas Chandra  

E-print Network

Evaluation of biological cell properties using dynamic indentation measurement Guoxin Cao February 2010 Viscoelastic mechanical properties of biological cells are commonly measured using atomic on numerical simulation is built to determine the cell mechanical properties. It is shown that the existing

Farritor, Shane

84

Size dependent thermal conductivity of single-walled carbon nanotubes Ajing Cao and Jianmin Qu  

E-print Network

Size dependent thermal conductivity of single-walled carbon nanotubes Ajing Cao and Jianmin Qu-dependent thermal conductivity in single-walled carbon nanotubes with lengths up to micrometers at room temperature. It is found that the size-dependent thermal conductivity of single-walled carbon nanotubes can be described

Chen, Wei

85

Remote Automatic Material On-Line Sensor  

SciTech Connect

Low cost NMR sensor for measuring moisture content of forest products. The Department of Energy (DOE) Industries of the Future (IOF) program seeks development and implementation of technologies that make industry more efficient--in particular, more energy-efficient. Quantum Magnetics, Inc. (QM), a wholly-owned subsidiary of GE Security, received an award under the program to investigate roles for low-cost Nuclear Magnetic Resonance (NMR) technology in furtherance of these goals. Most NMR systems are designed for high-resolution spectroscopy applications. These systems use intense magnetic fields produced by superconducting magnets that drive price and operating cost to levels beyond industry tolerance. At low magnetic fields, achievable at low cost, one loses the ability to obtain spectroscopic information. However, measuring the time constants associated with the NMR signal, called NMR relaxometry, gives indications of chemical and physical states of interest to process control and optimization. It was the purpose of this effort to investigate the technical and economic feasibility of using such low-field, low-cost NMR to monitor parameters enabling greater process efficiencies. The primary target industry identified in the Cooperative Development Agreement was the wood industry, where the moisture content of wood is a key process parameter from the time the cut tree enters a mill until the time it is delivered as pieces of lumber. Extracting the moisture is energy consuming, and improvements in drying efficiency stand to reduce costs and emissions substantially. QM designed and developed a new, low-cost NMR instrument suitable for inspecting lumber up to 3 inches by 12 inches in cross section, and other materials of similar size. Low cost is achieved via an inexpensive, permanent magnet and low-cost NMR spectrometer electronics. Laboratory testing demonstrated that the NMR system is capable of accurate ({+-} 0.5%) measurements of the moisture content of wood for moisture ranging from 2% to over 140% (referenced to the wood's dry weight). Accuracy exceeded that offered by existing instrumentation when the moisture content was in excess of the fiber saturation point ({approx}20%). Accuracy was independent of the wood form: solid wood, wood chips or sawdust. The prototype NMR system was designed and built for incorporation and use in a beta test site. Beta testing is under way at the pilot plant operated by the Pulp and Paper Research Institute of Canada (PAPRICAN) in Vancouver, B.C. Other industries were also investigated. For example, laboratory testing demonstrated that low-field NMR is capable of measuring the hydrogen content of calcium oxide (quicklime). Hydrogen content measurement can be done both rapidly (on the order of 1 second) and nondestructively. Measurement of moisture in quicklime affects energy consumption in the steel industry. Further advances in system electronics, ongoing under DOD support, will enable yet more substantial system cost reductions over the prototype system, opening up a wider range of utility.

Magnuson, Erik

2005-12-20

86

Evidence for Priming Across Intervening Sentences During On-Line Sentence Comprehension.  

PubMed

Three experiments investigated factors contributing to syntactic priming during on-line comprehension. In all of the experiments, a prime sentence containing a reduced relative clause was presented prior to a target sentence that contained the same structure. Previous studies have shown that people respond more quickly when a syntactically related prime sentence immediately precedes a target. In the current study, ERP and eyetracking measures were used to assess whether priming in sentence comprehension persists when one or more unrelated filler sentences appear between the prime and the target. In experiment 1, a reduced P600 was found to target sentences both when there were no intervening unrelated fillers, and when there was one unrelated filler between the prime and the target. Thus, processing the prime sentence facilitated processing of the syntactic form of the target sentence. Experiments 2 and 3, eye-tracking experiments, showed that target sentence processing was facilitated when three filler sentences intervened between the prime and the target. These experiments show that priming effects in comprehension can be observed when unrelated material appears after a prime sentence and before the target. We interpret the results with respect to residual activation and implicit learning accounts of priming. PMID:24678136

Tooley, Kristen M; Swaab, Tamara Y; Boudewyn, Megan A; Zirnstein, Megan; Traxler, Matthew J

2014-01-01

87

On-line maintenance methodology development and its applications  

SciTech Connect

With the increasing economic pressures being faced and the potential for shortening outage times under the conditions of deregulated electricity markets in the world, licensees are motivated to get an increasing amount of the on-line maintenance (OLM). The benefits of the OLM includes increased system and plant reliability, reduction of plant equipment and system material condition deficiencies that could adversely impact operations, and reduction of work scope during plant refueling outages. In Korea, allowance guidelines of risk assessment is specified in the safety regulation guidelines 16.7 and 16.8 of the Korea Inst. of Nuclear Safety (KINS), which is 'General guidelines of Risk-informed application for requesting permission of changes' and 'Requesting permission of changes of Risk-informed application for Technical Specification'. We select the emergency diesel generator (EDG) of the Ulchin unit 3 and 4 for risk assessment analysis by applying configuration changes. The EDG which has plant safety level IE belongs to on-site standby power (A, B train EDG) in electric distribution system. The EDG is important component because it should maintain standby status during plant is operating, therefore we select the EDG for target component of risk assessment analysis. The risk assessment is limited to CDF. The risk assessment is performed by using AIMS-PSA Release2. We evaluate CDF by applying the configuration changes with some assumptions. Evaluation of the full power operation and Low power/Shut down operation was performed. This study has been performed for introducing a methodology and performing risk assessment. (authors)

Kim, J.; Jae, M. [Dept. of Nuclear Engineering, Hanyang Univ., 17 Haengdang, Sungdong, Seoul (Korea, Republic of)

2012-07-01

88

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

89

On-line hydraulic state prediction for water distribution systems  

E-print Network

This paper describes and demonstrates a method for on?line hydraulic state prediction in urban water networks. The proposed method uses a Predictor?Corrector (PC) approach in which a statistical data?driven algorithm is ...

Whittle, Andrew

90

On-line electronic textbook of college level Mathematics  

NSDL National Science Digital Library

An on-line electronic textbook, specifically for A level courses from AQA, OCR, Edexcel. Suitable for many American university undergraduate courses. 5,700 pages of text and questions. All questions have worked solutions.

Fekete, Peter

2007-08-04

91

Measuring the Effects of an On-Line Training Module for School Psychologists Working with Traumatized Children: A Pilot Study  

ERIC Educational Resources Information Center

The present study was designed to address the current lack of trauma training provided to school psychologists. Specifically, this study employed a randomized, controlled design to test the efficacy of an on-line training targeting school psychology graduate student trainees' awareness of the signs and symptoms of child abuse as well as their…

Dezen, Kristin

2012-01-01

92

FROM OFF-LINE TO ON-LINE HANDWRITING RECOGNITION  

Microsoft Academic Search

On-line handwriting includes more information on the time order of the writing signal and on the dynamics of the writing process than off-line handwriting. Therefore, on-line recognition systems achieve higher recognition rates. This can be concluded from results reported in the literature, and has been demonstrated empirically as part of this work. We propose a new approach for recovering the

P. M. LALLICAN; C. VIARD-GAUDIN; S. KNERR

2000-01-01

93

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

94

On-line octane control with NIR analyzers. [Near InfraRed  

SciTech Connect

On-line octane monitoring at the blender offers substantial advantages in reformulating gasoline and minimizing octane giveaway'. Accurate, real-time measurement of octane number allows rapid adjustments to component feed streams, compensating for variability in the rest of the refining process. With tighter control of the blending operation, less off-spec product is produced, which is particularly important when blending directly into a pipeline. In blending to tankage, less reblending is required to achieve the desired octane specification, which increases both efficiency and equipment utilization. Once tighter octane control is achieved, the refiner can shift octane number targets closer to minimum specifications, thereby reducing octane giveaway. The paper describes on-line octane measurement; remote sensing spectrophotometer; in-line application; principles of operation; instrument calibration; technical performance; tangible economic savings; and future expansion.

Zetter, M.S. (UOP Guided Wave, El Dorado Hills, CA (United States)); Politzer, B.A. (Strategic Marketing, Gatos, CA (United States))

1993-03-01

95

Making Routers Last Longer with ViAggre Hitesh Ballani, Paul Francis, Tuan Cao and Jia Wang  

E-print Network

1 Making Routers Last Longer with ViAggre Hitesh Ballani, Paul Francis, Tuan Cao and Jia Wang deployment would worsen the situation even more [29]. The increase in the size of the DFZ routing ta- ble has

Keinan, Alon

96

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

2012-12-28

97

Treatability of PCB-contaminated soils with quicklime (CaO)  

Microsoft Academic Search

The possibility that quicklime (calcium oxide, CaO) can destroy PCBs has received much attention over the past year. Observations at an EPA remediation site, where lime-containing kiln dusts were used for interim stabilization of PCB-containing wastes prompted the EPA to sponsor a small research project to investigate quicklime-PCB interactions. That study reported decreases in PCB content in synthetic, PCB-spiked soil

D. Mauro; B. B. Taylor

1992-01-01

98

Mechanism of CaO reaction with H 2S: Diffusion through CaS product layer  

Microsoft Academic Search

Heterogeneous non-catalytic reaction between CaO and H2S to capture sulfur in coal-fired gasifier is studied in a differential bed flow-through reactor. Particles of CaO (<10?m) are exposed to simulated fuel gas containing up to 5000ppm H2S in the temperature range 700–900°C. The effects of reaction temperature, H2S concentration, and sorbent surface area on the extent of sulfur capture and conversion

Rajeev Agnihotri; Shriniwas S. Chauk; Suhas K. Mahuli; Liang-Shih Fan

1999-01-01

99

Development of CaO coatings by thermal and chemical vapor deposition  

NASA Astrophysics Data System (ADS)

We conducted several experiments to test electrically insulating CaO coatings on a V-4Cr-4Ti alloy for application in the Li environment of liquid metal blankets in fusion reactors. Two processes that involve double Ca deposition/oxidation steps were developed to successfully coat V-4Cr-4Ti alloy samples with stable CaO. During the study, we examined several geometrical arrangements, using tabs and/or rod specimens. After Ca deposition from the vapor phase, the specimens were oxidized in an Ar-10 vppm O 2 environment at ?600 °C to convert the deposited metal into oxide, whereupon they exhibited insulating characteristics. Several coated specimens were then exposed to Li-2.8 at.%Ca at 500-700 °C to determine chemical compatibility and mechanical integrity. Depth profile analysis of the coatings was conducted to evaluate the compositional changes in the coatings and to assess the transport, if any, of substrate and coating constituents. Microstructural characteristics of the coatings were evaluated by scanning electron microscopy. The preliminary results indicate that CaO is a viable coating for V-Li advanced blankets.

Natesan, K.; Uz, M.; Smith, D. L.

2002-12-01

100

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

2013-12-15

101

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

SciTech Connect

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.

Ahunbay, Ergun E.; Peng, Cheng; Godley, Andrew; Schultz, Christopher; Li, X. Allen [Department of Radiation Oncology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226 (United States)

2009-10-15

102

On-line access to geoscience bibliographic citations  

USGS Publications Warehouse

On-line geoscience bibliographic citations and access points to citations are exponentially increasing as commercial, non-profit, and government agencies worldwide publish materials electronically. On-line bibliographic tools capture cited works, and open access content allows for freely obtained citations and documents. For this newsletter, citations from the numerous journals and books listed in the "Recent Papers" section of the EXPLORE newsletters from 2008-2011 were used to provide freely-accessible web sites to determine the availability of bibliographic information.

Wild, Emily C.

2012-01-01

103

On line production costs monitoring in energy management systems  

Microsoft Academic Search

This paper presents a new tool for on line thermal and pumping plant production cost monitoring recently developed in the Energy Management System at the ENEL National Control Centre in Rome, Italy.Instantaneous production and marginal costs are computed at unit level by means of the active power telemeasurements received at NCC from power plants and data about cost curves and

G. Castellano; G. Moreschini; D. Scapeccia; A. Serrani

1997-01-01

104

Adaptive on-line model for aerobic Saccharomyces cerevisiae fermentation.  

PubMed

In order to study and control fermentation processes, indirect on-tine measurements and mathematical models can be used. In this article we present a mathematical on-line model for fermentation processes. The model is based on atom and partial mass balances as well as on equations describing the acid-base system. The model is brought into an adaptive form by including transport equations for mass transfer and unstructured expressions for the fermentation kinetics. The state of the process, i.e., the concentrations of biomass, substrate, and products, can be estimated on-line using the balance part of the model completed with measurement equations for the input and output flows of the process. Adaptivity is realized by means of on-line estimation of parameters in the transport and kinetic expressions using recursive regression analysis. These expressions can thus be used in the model as valid equations enabling prediction of the process. This makes model-based automation of the process and testing of the validity of the measurement variables possible. The model and the on-line principles are applied to a 3.5-L laboratory tormentor in which Saccharomyces cerevisiae is cultivated. The experimental results show that the model-based estimation of the state and the predictions of the process correlate closely with high-performance liquid chromatography (HPLC) analyses. (c) 1995 John Wiley & Sons, Inc. PMID:18623532

von Schalien, R; Fagervik, K; Saxén, B; Ringbom, K; Rydström, M

1995-12-20

105

On-line diagnosis of sequential systems, 2  

NASA Technical Reports Server (NTRS)

The theory and techniques applicable to the on-line diagnosis of sequential systems, were investigated. A complete model for the study of on-line diagnosis is developed. First an appropriate class of system models is formulated which can serve as a basis for a theoretical study of on-line diagnosis. Then notions of realization, fault, fault-tolerance and diagnosability are formalized which have meaningful interpretations in the the context of on-line diagnosis. The diagnosis of systems which are structurally decomposed and are represented as a network of smaller systems is studied. The fault set considered is the set of faults which only affect one component system is the network. A characterization of those networks which can be diagnosed using a purely combinational detector is achieved. A technique is given which can be used to realize any network by a network which is diagnosable in the above sense. Limits are found on the amount of redundancy involved in any such technique.

Sundstrom, R. J.

1974-01-01

106

Developing an On-Line Interactive Health Psychology Module  

ERIC Educational Resources Information Center

On-line teaching material in health psychology was developed which ensured a range of students could access appropriate material for their course and level of study. This material has been developed around the concept of smaller "content chunks" which can be combined into whole units of learning (topics), and ultimately, a module. On the basis of…

Upton, Dominic; Cooper, Carol

2006-01-01

107

On-Line Machine Covering Yossi Azar1  

E-print Network

On-Line Machine Covering Yossi Azar1 ,Leah Epstein2 1 Dept. of Computer Science, Tel of scheduling a sequence of jobs to m parallel machines as to maximize the minimum load over the machines. This situation corresponds to a case that a system which consists of the m machines is alive (i.e. productive

Azar, Yossi

108

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...

109

Improving Linking from the Literature to On-line Data  

Microsoft Academic Search

The ADS, in close collaboration with the Astrophysics Data Centers Executive Committee (ADEC) and the American Astronomical Society (AAS) has been working on improving the linking between the literature and on-line data by allowing authors to specify data that were used in the research described in journal articles. We are working with the ADEC on identifying data sets in a

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

2003-01-01

110

On-line fuzzy logic control of tube bending  

NASA Astrophysics Data System (ADS)

This paper describes the simulation and on-line fuzzy logic control of tube bending. By combining elasticity and plasticity theories, a conventional model was developed. The results from simulation were compared with those obtained from testing. The experimental data reveal that there exists certain level of uncertainty and nonlinearity in tube bending, and its variation could be significant. To overcome this, a on-line fuzzy logic controller with self-tuning capabilities was designed. The advantages of this on-line system are (1) its computational requirement is simple in comparison with more algorithmic-based controllers, and (2) the system does not need prior knowledge of material characteristics. The device includes an AC motor, a servo controller, a forming mechanism, a 3D optical sensor, and a microprocessor. This automated bending machine adopts primary and secondary errors between the actual response and desired output to conduct on-line rule reasoning. Results from testing show that the spring back angle can be effectively compensated by the self- tuning fuzzy system in a real-time fashion.

Lieh, Junghsen; Li, Wei Jie

2005-11-01

111

Kalman filtering algorithm for on-line memory polynomial predistortion  

E-print Network

Kalman filtering algorithm for on-line memory polynomial predistortion Mourad Djamai 1 , Smail. Kalman filtering algorithm with sliding time-window is adapted to track the changes in the PA predistortion, Kalman Filtering, parameter estimation, adaptive control. I. INTRODUCTION Nonlinear system

Paris-Sud XI, Université de

112

Space and Movable Equipment On-line Inventory  

E-print Network

Space and Movable Equipment On-line Inventory FY14 (July 2013 - June 2014) CAS ­ Cost Accounting and Michael Richards #12;Learning Objectives · Gain understanding of the Importance of Space & Equipment Inventory. · Understand the entire Inventory Process. · How to classify functional space. · How to inventory

Hayden, Nancy J.

113

A simulation of the SDC on-line processing farm  

SciTech Connect

In the Solenoidal Detector Collaboration (SDC) data acquisition system (DAQ), an enormous amount of data flows into a processor farm for extraction of interesting physics events. To design an efficient on-line filter, the operations in the farm must be carefully modeled. The authors present a simulation model developed at the Superconducting Super Collider Laboratory which efficiently allocates physics events to the farm.

Wang, C.; Chen, Y.; Dorenbosch, J.; Lee, J. [Superconducting Super Collider Lab., Dallas, TX (United States); Sayle, R. [Univ. of California, Irvine, CA (United States)

1993-10-01

114

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives  

E-print Network

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives Date (s) 01-May-13 Total Amount $59.33 Event Description International Strategy Date (s) 29-May-13 Attendees 4 Total Amount Date (s) 25-Jun-13 Attendees 2 Total Amount $31.08 Event Description International Strategy Date (s) 29

115

MS on-line expenses: HOSPITALITY Event Description International Strategy  

E-print Network

MS on-line expenses: HOSPITALITY Event Description International Strategy Date (s) 09-Jan-13) 25-Mar-13 Attendees 3 Total Amount $61.02 Event Description International Strategy Date (s) 25-Mar-13 Attendees 3 Total Amount $6.98 Event Description Strategic Initiatives Date (s) 15-Jan-13 Attendees 2 Total

116

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives  

E-print Network

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives Date (s) 25-May-12.11 Event Description International Strategy Date (s) 14-Aug-2012 Attendees 2 Total Amount $29.95 Event International Strategy Date (s) 14-Aug-2012 Attendees 2 Total Amount $29.95 Event Description Strategic

117

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives  

E-print Network

MS on-line expenses: HOSPITALITY Event Description Strategic Initiatives Date (s) 27-Jan-14) 11-Jan-14 Attendees 2 Total Amount $51.42 Event Description International Strategy Date (s) 16-Jan-14 Attendees 2 Total Amount $33.97 Event Description Strategic Initiatives Date (s) 18-Dec-13 Attendees 25

118

On-Line Renewals Spring 2015 Co-op Timeline  

E-print Network

to turn in completed forms into the International Center to guarantee January 12th start date January 12/Work Authorizations to the International Center April 3, 2015 Latest date to begin working Spring 2015 NEW CoOn-Line Renewals Spring 2015 Co-op Timeline All students applying for Co-ops &/or Internships must

Heller, Barbara

119

On-line resources for the pain medicine physician  

Microsoft Academic Search

Background and Objectives: The Internet is increasingly an important resource for both the Pain Medicine physician and the patient. Considerable high-quality information exists within numerous government, university, professional association, and private sites. Large documents, such as patient care guidelines, can be readily retrieved on-line. Search capabilities within websites improve the efficiency of information retrieval. Clinicians may communicate about complex patient

Karen Steckner; Raymond Borkowski

2000-01-01

120

Laser Ultrasonic System for On-Line Steel Tube Gauging  

Microsoft Academic Search

A laser-ultrasonic system has been installed on a seamless tubing production line of The Timken Company and is being used to measure on-line the wall thickness of tubes during processing. The seamless process consists essentially in forcing a mandrel through a hot cylindrical billet in rotation and typically results in fairly large wall thickness variations that should be minimized and

Jean-Pierre Monchalin; Marc Choquet; Christian Padioleau; Christian Néron; Daniel Lévesque; Alain Blouin; Christian Corbeil; Richard Talbot; Abdelhakim Bendada; Mario Lamontagne; Robert V. Kolarik; Gerald V. Jeskey; Erich D. Dominik; Larry J. Duly; Kenneth J. Samblanet; Steven E. Agger; Kenneth J. Roush; Michael L. Mester

2003-01-01

121

ON-LINE TOXICITY MONITORS AND WATERSHED EARLY WARNING SYSTEMS  

EPA Science Inventory

A Water Quality Early Warning System using On-line Toxicity Monitors (OTMs) has been deployed in the East Fork of the Little Miami River, Clermont County, OH. Living organisms have long been used to determine the toxicity of environmental samples. With advancements in electronic ...

122

Statistical Mechanics of On-line learning Michael Biehl1  

E-print Network

Statistical Mechanics of On-line learning Michael Biehl1 , Nestor Caticha2 , and Peter Riegler3 1 Introduction The perception that Statistical Mechanics is an inference theory has opened the possibility of part of the Statistical Mechanics community during the last decades in machine learning

Biehl, Michael

123

Falcon: On-line Monitoring and Steering of Parallel Programs  

Microsoft Academic Search

Advances in high performance computing, communications, and user interfaces are enabling developers to construct increasingly interactive high performance applications. The Falcon system presented in this paper supports such interactivity by providing runtime libraries, tools, and user interfaces that jointly permit the on-line monitoring and steering of large-scale parallel codes. The principal aspects of Falcon described in this paper are its

Weiming Gu; Greg Eisenhauer; Karsten Schwan; Jeffrey Vetter

1995-01-01

124

`On line' data handling in a routine haematology department  

PubMed Central

The use of a `stand alone' mini computer, on line, data acquisition system is described utilising a microprocessor as an adjunct to the main central processor to increase data transmission rates. Visual display units (VDU) provide on line flexibility of data input. The system acquires, on line, the Coulter S generated parameters together with the associated patient identification data and other requested tests. Erythrocyte sedimentation rate, platelet count, and B12 and folate results are fed in at will via the VDUs, using rapid entry subroutines. Percentage differential white cell count results and the absolute leucocyte count are calculated by the microprocessor, on line input being facilitated by remote keyboards associated with the VDUs. Total editing of all requests and results is available on all `current' (unfiled) reports via the VDUs, and this facility includes the entry of film appearances using plus symbols and predetermined comments available against a code number. This editing function is also used to enter all other results that can be made available on the computer-printed report form. The computer system also provides quality control data, immediate printout of Coulter S results outside given limits, cumulative filing for all routine and designated `priority' results, and a daily alphabetical listing of all patients from whom specimens have been examined together with full blood count, ESR, and platelet results on specimens examined that day. PMID:429594

Burmester, H. B. C.; Crow, G. S.

1979-01-01

125

Children's On-Line Processing of Scrambling in Japanese  

ERIC Educational Resources Information Center

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…

Suzuki, Takaaki

2013-01-01

126

A Simulation For The SDC On-line Processing Farm  

Microsoft Academic Search

In the Solenoidal Detector Collaboration (SDC) data acquisition system (DAQ), an enormous amount of data flows into a processor farm for extraction of interesting physics events. To design an efficient on-line filter, the operations in the farm must be carefully modeled. The authors present a simulation model developed at the Superconducting Super Collider Laboratory which efficiently allocates physics events to

C. C. Wang; Y. M. Chen; J. Dorenbosch; J. A. Lee; R. P. Sayle

1993-01-01

127

On-line mass storage system functional design document  

NASA Technical Reports Server (NTRS)

A functional system definition for an on-line high density magnetic tape data storage system is provided. This system can be implemented in a multi-purpose, multi-host environment, and satisfy the requirements of economical data storage in the range of 2 to 50 billion bytes.

Earnest, D.

1975-01-01

128

On-line monitoring applications in nuclear power plants  

Microsoft Academic Search

The nuclear power industry is working to reduce generation costs by adopting condition-based maintenance strategies and automating testing activities. These developments have stimulated great interest in on-line monitoring (OLM) technologies and new diagnostic and prognostic methods to anticipate, identify, and resolve equipment and process problems and ensure plant safety, efficiency, and immunity to accidents. This paper provides examples of these

H. M. Hashemian

2011-01-01

129

Arts & Lecture Series Free on-line ticketing  

E-print Network

Fermilab Arts & Lecture Series 2013­14 Free on-line ticketing now available! Check our web page Stars of Dance Chicago Jingle Babes: Decking the Halls with Songs and Folly--The Four Bitchin' Babes. James Kakalios The Physics of Superheroes Physics Slam 2013 Dr. Pete Beckman Super Smart Supercomputers

Quigg, Chris

130

Stealth Measurements for Cheat Detection in On-line Games  

E-print Network

Stealth Measurements for Cheat Detection in On-line Games Wu-chang Feng Portland State University to avoiding detection by anti-cheat software. To ad- dress this problem and turn the tables on cheaters, this pa- per examines an approach for cheat detection based on the use of stealth measurements via tamper

131

21 CFR 870.4330 - Cardiopulmonary bypass on-line blood gas monitor.  

Code of Federal Regulations, 2012 CFR

...false Cardiopulmonary bypass on-line blood gas monitor. 870.4330 Section...4330 Cardiopulmonary bypass on-line blood gas monitor. (a) Identification. A cardiopulmonary bypass on-line blood gas monitor is a device used in...

2012-04-01

132

21 CFR 870.4330 - Cardiopulmonary bypass on-line blood gas monitor.  

Code of Federal Regulations, 2014 CFR

...false Cardiopulmonary bypass on-line blood gas monitor. 870.4330 Section...4330 Cardiopulmonary bypass on-line blood gas monitor. (a) Identification. A cardiopulmonary bypass on-line blood gas monitor is a device used in...

2014-04-01

133

21 CFR 870.4330 - Cardiopulmonary bypass on-line blood gas monitor.  

Code of Federal Regulations, 2013 CFR

...false Cardiopulmonary bypass on-line blood gas monitor. 870.4330 Section...4330 Cardiopulmonary bypass on-line blood gas monitor. (a) Identification. A cardiopulmonary bypass on-line blood gas monitor is a device used in...

2013-04-01

134

21 CFR 870.4330 - Cardiopulmonary bypass on-line blood gas monitor.  

Code of Federal Regulations, 2011 CFR

...false Cardiopulmonary bypass on-line blood gas monitor. 870.4330 Section...4330 Cardiopulmonary bypass on-line blood gas monitor. (a) Identification. A cardiopulmonary bypass on-line blood gas monitor is a device used in...

2011-04-01

135

7 CFR 42.135 - Normal, tightened or reduced on-line inspection.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Normal, tightened or reduced on-line inspection...and Inspection Procedures § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line...

2010-01-01

136

7 CFR 42.135 - Normal, tightened or reduced on-line inspection.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Normal, tightened or reduced on-line inspection...and Inspection Procedures § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line...

2012-01-01

137

7 CFR 42.135 - Normal, tightened or reduced on-line inspection.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Normal, tightened or reduced on-line inspection...and Inspection Procedures § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line...

2013-01-01

138

7 CFR 42.135 - Normal, tightened or reduced on-line inspection.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Normal, tightened or reduced on-line inspection...and Inspection Procedures § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line...

2014-01-01

139

7 CFR 42.135 - Normal, tightened or reduced on-line inspection.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Normal, tightened or reduced on-line inspection...and Inspection Procedures § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line...

2011-01-01

140

MASKER MASKER TARGET TARGET TARGET  

E-print Network

from a large speech database (Ives et al,2005). The original speech is from one speaker Probabilitycorrect -6 dB 0 dB Listeners were presented with two phrases of concurrent speech syllables. The masker syllables coincided with the second and third target syllables. The speech syllables were taken

Ives, D. Timothy

141

Attention in action: evidence from on-line corrections in left visual neglect.  

PubMed

It is widely accepted that the posterior parietal cortex is critical for the on-line control of action and optic ataxia patients are unable to correct their movements in-flight to changes in target position. The current study investigated on-line correction in patients with left visual neglect, right brain damaged patients without neglect and healthy controls. Participants were asked to reach towards a central target that could jump unexpectedly, at movement onset, to the right or left sides of space. In response to the jump, participants were asked either to follow the target or to stop their movement. Neglect patients were able to correct their ongoing movements smoothly and accurately towards right and left target jumps. They did so even when told to stop their movement, indicating that these corrections occurred automatically (i.e., without instruction). However, the timing of corrections to the left was delayed in neglect patients and this produced a drastic increase in movement time. To our surprise, we also found that neglect patients were impaired at stopping their ongoing reaches, when compared to the control groups, in response to either left or right jump trials. We suggest that the 'automatic pilot' system for the hand is spared in neglect, but its processing speed is unilaterally slowed due to a deficit in orienting of attention to the contralesional side. We relate these findings to the breakdown of a system that combines information for attention, perception and action. Damage to this system may not only slow corrective movements to the contralesional side, but also produce non-lateralized deficits in interrupting an ongoing reach. PMID:22044647

Rossit, Stéphanie; McIntosh, Robert D; Malhotra, Paresh; Butler, Stephen H; Muir, Keith; Harvey, Monika

2012-05-01

142

Automatic Delineation of On-Line Head-And-Neck Computed Tomography Images: Toward On-Line Adaptive Radiotherapy  

SciTech Connect

Purpose: To develop and validate a fully automatic region-of-interest (ROI) delineation method for on-line adaptive radiotherapy. Methods and Materials: On-line adaptive radiotherapy requires a robust and automatic image segmentation method to delineate ROIs in on-line volumetric images. We have implemented an atlas-based image segmentation method to automatically delineate ROIs of head-and-neck helical computed tomography images. A total of 32 daily computed tomography images from 7 head-and-neck patients were delineated using this automatic image segmentation method. Manually drawn contours on the daily images were used as references in the evaluation of automatically delineated ROIs. Two methods were used in quantitative validation: (1) the dice similarity coefficient index, which indicates the overlapping ratio between the manually and automatically delineated ROIs; and (2) the distance transformation, which yields the distances between the manually and automatically delineated ROI surfaces. Results: Automatic segmentation showed agreement with manual contouring. For most ROIs, the dice similarity coefficient indexes were approximately 0.8. Similarly, the distance transformation evaluation results showed that the distances between the manually and automatically delineated ROI surfaces were mostly within 3 mm. The distances between two surfaces had a mean of 1 mm and standard deviation of <2 mm in most ROIs. Conclusion: With atlas-based image segmentation, it is feasible to automatically delineate ROIs on the head-and-neck helical computed tomography images in on-line adaptive treatments.

Zhang Tiezhi [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States)]. E-mail: tiezhi.zhang@beaumont.edu; Chi Yuwei [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States); Meldolesi, Elisa [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States); Yan Di [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States)

2007-06-01

143

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.

144

DUSTER: collection of meteoric CaO and carbon smoke particles in the upper stratosphere  

NASA Astrophysics Data System (ADS)

Nanometer CaO and pure carbon smoke particles were collected at 38-km altitude in the upper stratosphere in the Arctic during June 2008 using DUSTER (Dust in the Upper Stratosphere Tracking Experiment and Retrieval), a balloon-borne instrument for the non-destructive collection of solid particles between 200 nm to 40 microns. We report the collection of micron sized CaCO3 (calcite) grains. Their morphologies show evidence of melting and condensation after vaporization suggest at temperatures of approximately 3500 K. The formation environment of the collected grains was probably a dense dust cloud formed by the disintegration of a carbonaceous meteoroid during deceleration in the Earth's atmosphere.

Rietmeijer, F. J. M.; Della Corte, V.; Rotundi, A.; Ferrari, M.; Palumbo, P.

2014-04-01

145

Effect of CaO Addition on Iron Recovery from Copper Smelting Slags by Solid Carbon  

NASA Astrophysics Data System (ADS)

We investigated the effect of flux (lime) addition on the reduction behavior of iron oxide in copper slag by solid carbon at 1773 K (1500 °C). In particular, we quantified the recovery of iron by performing typical kinetic analysis and considering slag foaming, which is strongly affected by the thermophysical properties of slags. The iron oxide in the copper slag was consistently reduced by solid carbon over time. In the kinetic analysis, we determined mass transfer coefficients with and without considering slag foaming using a gas holdup factor. The mass transfer of FeO was not significantly changed by CaO addition when slag foaming was ignored, whereas the mass transfer of FeO when slag foaming was considered was at a minimum in the 20 mass pct CaO system. Iron recovery, defined as the ratio of the amount of iron clearly transferred to the base metal ingot to the initial amount of iron in the slag phase before reduction, was maximal (about 90 pct) in the 20 mass pct CaO system. Various types of solid compounds, including Mg2SiO4 and Ca2SiO4, were precipitated in slags during the FeO reduction process, and these compounds strongly affected the reduction kinetics of FeO as well as iron recovery. Iron recovery was the greatest in the 20 mass pct CaO system because no solid compounds formed in this system, resulting in a highly fluid slag. This fluid slag allowed iron droplets to fall rapidly with high terminal velocity to the bottom of the crucible. A linear relationship between the mass transfer coefficient of FeO considering slag foaming and foam stability was obtained, from which we concluded that the mass transfer of FeO in slag was effectively promoted not only by gas evolution due to reduction reactions but also by foamy slag containing solid compounds. However, the reduced iron droplets were finely dispersed in foamy and viscous slags, making actual iron recovery a challenge.

Heo, Jung Ho; Kim, Byung-Su; Park, Joo Hyun

2013-12-01

146

Half-Antibody Functionalized Lipid-Polymer Hybrid Nanoparticles for Targeted Drug Delivery to  

E-print Network

to Carcinoembryonic Antigen Presenting Pancreatic Cancer Cells Che-Ming Jack Hu,, Sharmeela Kaushal, Hop S. Tran Cao chemotherapy regimens against pancreatic cancer are met with little success as poor tumor vascularization, physicochemical properties, and targeting ability against pancreatic cancer cells. Under the same drug loading

Zhang, Liangfang

147

On-line object feature extraction for multispectral scene representation  

NASA Technical Reports Server (NTRS)

A new on-line unsupervised object-feature extraction method is presented that reduces the complexity and costs associated with the analysis of the multispectral image data and data transmission, storage, archival and distribution. The ambiguity in the object detection process can be reduced if the spatial dependencies, which exist among the adjacent pixels, are intelligently incorporated into the decision making process. The unity relation was defined that must exist among the pixels of an object. Automatic Multispectral Image Compaction Algorithm (AMICA) uses the within object pixel-feature gradient vector as a valuable contextual information to construct the object's features, which preserve the class separability information within the data. For on-line object extraction the path-hypothesis and the basic mathematical tools for its realization are introduced in terms of a specific similarity measure and adjacency relation. AMICA is applied to several sets of real image data, and the performance and reliability of features is evaluated.

Ghassemian, Hassan; Landgrebe, David

1988-01-01

148

Potential of on-line CIMS for bioprocess monitoring.  

PubMed

Chemical-ionization mass spectrometry (CIMS) using flow reactors is an emerging method for on-line monitoring of trace concentrations of organic compounds in the gas phase. In this study, a flow-reactor CIMS instrument, employing the H(3)O(+) cation as the ionizing reagent, was used to simultaneously monitor several volatile metabolic products as they are released into the headspace during bacterial growth in a bioreactor. Production of acetaldehyde, ethanol, acetone, butanol, acetoin, diacetyl, and isoprene by Bacillus subtilis is reported. Ion signal intensities were related to solution-phase concentrations using empirical calibrations and, in the case of isoprene, were compared with simultaneous gas chromatography measurements. Identification of volatile and semivolatile metabolites is discussed. Flow-reactor CIMS techniques should be useful for bioprocess monitoring applications because of their ability to sensitively and simultaneously monitor many volatile metabolites on-line. PMID:12892502

Custer, Thomas G; Wagner, William P; Kato, Shuji; Bierbaum, Veronica M; Fall, Ray

2003-01-01

149

On-line performance monitoring for boiling water reactor plants  

SciTech Connect

While fossil plants have utilized on-line performance monitoring for reducing heat rate, nuclear plants have traditionally employed off-line tools to improve plant efficiency. However, any increase in plant output while maintaining reactor heat input is easily justified. Thus on-line performance monitoring on boiling water reactor (BWR) plants to locate power losses in the cycle is useful in maximizing the capacity of the plant. In addition, it is quite valuable to use an off-line predictive model to perform what-if analyses and to retrieve and display plant data in a variety of formats. This paper presents an overview of the unique software product jointly developed by GE Nuclear Energy and Black and Veatch, including a description of the software capabilities, sample screens and reports, and typical applications of the product.

Josyula, R. [General Electric Nuclear Energy, San Jose, CA (United States); Gross, R.; Jonas, T.; Logback, F. [Black and Veatch, Kansas City, MO (United States)

1995-10-01

150

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

151

On-Line Handwriting Character Recognition Using Stroke Information  

Microsoft Academic Search

For the purpose of improvement in computational time and recognition accuracy in the framework of stroke order- and number-free\\u000a on-line handwriting character recognition, we performed structural analysis of the style of stroke order and stroke connection.\\u000a From the real handwritten characters, chosen from among 2965 Chinese characters, we investigated the information on stroke\\u000a order and connection, using the automatic stroke

Jungpil Shin

2002-01-01

152

Using Adapted Levenshtein Distance for On-Line Signature Authentication  

Microsoft Academic Search

In this paper a new method for on-line signature authen- tication will be presented, which is based on a event-string modelling of features derived from pen-position and pres- sure signals of digitizer tablets. A distance measure well known from textual pattern recognition, the Levenshtein Distance, is used for comparison of signatures and classifi- cation is carried out applying a nearest

Sascha Schimke; Claus Vielhauer; Jana Dittmann

2004-01-01

153

ON-LINE INDEPENDENT SUPPORT VECTOR MACHINES FOR COGNITIVE SYSTEMS  

Microsoft Academic Search

Abstract. Learning from experience and adapting to changing,stimuli are fundamental capabilities for artificial cognitive systems. This calls for on-line learning methods,able to a chieve high accuracy while at the same time using limited computer,power. Research on autonomous,agents has been actively investigating these issues, mostly using probabilistic frameworks and within the context of navigation and learning by imitation. Still, recent results

Francesco Orabona; Claudio Castellini; Barbara Caputo; Luo Jie; Giulio Sandini

154

On-line slurry analyses by californium-252  

Microsoft Academic Search

In chemical processing technology on-line activation methods gain an increasing importance for process monitoring and control.\\u000a In the paper presented a method is described according to which the different fluorspar contents at various strategic points\\u000a of a flotation plant are to be determined through neutron activation by 100 ?g252 californium. For that purpose, a continuous analytical system for on-stream process

H. Braun; F. Riffel

1977-01-01

155

On-line measurement of rheological yield stress  

SciTech Connect

The yield stress of rheologically plastic fluids such as coatings or sealants determines their tendency to flow at low gravitational stresses. Yield stress may be defined as the apparent threshold stress above which flow is observed on an arbitrary time scale. An on-line technique to monitor yield stress during processing would be commercially valuable in controlling the critical self-leveling vs. non-slump behavior of such products. Such a technique is proposed and crudely demonstrated using a capillary rheometer.

DeLeeuw, D.; Langley, N. [Dow Corning Corp., Midland, MI (United States)

1996-12-31

156

COCA: A Secure Distributed On-line Certification Authority  

Microsoft Academic Search

Abstract COCA is a fault-tolerant and secure on-line certification authority that has been built and deployed both in a local area network and in the Internet. Extremely weak assumptions characterize environments in which COCA’s protocols execute correctly: no assumption is made about execution speed and message delivery delays; channels are expected to exhibit only inter- mittent reliability; and with 3t

Lidong Zhou; Fred B. Schneider; Robbert van Renesse

2000-01-01

157

On-line sensing for healthier FPGA systems  

Microsoft Academic Search

Electronic systems increasingly suffer from component variation, thermal hotspots, uneven wearout, and other subtle physical phenomena. Systems based on FPGAs have unique opportunities for adapting to such effects. Required, however, is a low-cost, fine-grained method for sensing physical parameters. This paper presents an approach to on-line sensing that includes a compact multi-use sensor implemented in reconfigurable logic, methods for instrumenting

Kenneth M. Zick; John P. Hayes

2010-01-01

158

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

159

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

160

Evaluation of 3 Commercially Available, On-Line TOC Analyzers for Monitoring Recycled Water in Semiconductor Processing  

Microsoft Academic Search

Rapid detection of excursions in the concentration of organic contaminants in water that is being recycled is crucial to the more widespread acceptance of rinse water recycling as a method of reducing water usage in semiconductor manufacturing. In 1995 SEMATECH'SS116 PTAB (Project Technical Advisory Board) arbitrarily targeted a response time of 30s as the goal for the on-line detection of

J. DeGenova; R. P. Donovan; D. Morrison

1998-01-01

161

On-line heat flux measurements improve the culture medium for the growth and productivity of genetically engineered CHO cells  

Microsoft Academic Search

With the increasingly competitive commercial production of target proteins by hybridoma and genetically engineered cells,\\u000a there is an urgent requirement for biosensors to monitor and control on-line and in real time the growth of cultured cells.\\u000a Since growth is accompanied by an enthalpy change, heat dissipation measured by calorimetry could act as an index for metabolic\\u000a flow rate. Recombinant CHO

Yue H. Guan; Richard B. Kemp

1999-01-01

162

Nb-doped CaO: an efficient electron donor system  

NASA Astrophysics Data System (ADS)

Transition metal atoms incorporated into insulating materials (oxides in particular) can deeply modify their adsorption properties. In particular, charge transfer to adsorbed species can be induced by the presence of substitutional dopants, which introduce new electronic states in the band gap of the host crystal. Here we show, by means of density functional theory calculations, that Nb represents an excellent dopant to turn the rather inactive CaO(100) surface into an electron-rich support. The charge transfer ability of the doped material is shown by comparing the adsorption properties of the electronegative Au atoms on pure and Nb-doped CaO. While in the first case the CaO-Au bonding is relatively weak and the Au atom is essentially neutral, in the Nb-doped system a much stronger adhesion is found due to a net charge transfer from the Nb dopant and to the formation of a gold anion. This mechanism occurs also for Nb in high oxidation states. Nb is thus an excellent modifier of the calcium oxide properties.

Prada, Stefano; Giordano, Livia; Pacchioni, Gianfranco

2014-08-01

163

Nb-doped CaO: an efficient electron donor system.  

PubMed

Transition metal atoms incorporated into insulating materials (oxides in particular) can deeply modify their adsorption properties. In particular, charge transfer to adsorbed species can be induced by the presence of substitutional dopants, which introduce new electronic states in the band gap of the host crystal. Here we show, by means of density functional theory calculations, that Nb represents an excellent dopant to turn the rather inactive CaO(100) surface into an electron-rich support. The charge transfer ability of the doped material is shown by comparing the adsorption properties of the electronegative Au atoms on pure and Nb-doped CaO. While in the first case the CaO-Au bonding is relatively weak and the Au atom is essentially neutral, in the Nb-doped system a much stronger adhesion is found due to a net charge transfer from the Nb dopant and to the formation of a gold anion. This mechanism occurs also for Nb in high oxidation states. Nb is thus an excellent modifier of the calcium oxide properties. PMID:24935643

Prada, Stefano; Giordano, Livia; Pacchioni, Gianfranco

2014-08-01

164

Mechanochemical degradation of ?-hexachlorocyclohexane by a planetary ball mill in the presence of CaO.  

PubMed

Although the use of the insecticide ?-hexachlorocyclohexane (HCH) is now prohibited in many countries because of its hazardousness, stockpiles of ?-HCH still exist. In this study, we subjected ?-HCH to mechanochemical (MC) treatment with a planetary ball mill in the presence of CaO to investigate the feasibility of using this method for the treatment of ?-HCH stockpiles. We confirmed the degradation of ?-HCH and investigated the degradation mechanism. The major intermediates were identified to be 1,3,4,5,6-pentachlorocyclohexene (?-PCCH) and chlorobenzenes (CBzs). Analysis of the steric structure of ?-HCH and identification of the degradation intermediates suggested that successive dehydrochlorination led to the formation of trichlorobenzenes. Products of further degradation (dichlorobenzenes, monochlorobenzene, and benzene) were also detected. Surprisingly, methane and ethane were also detected, which suggests cleavage of the C-C bonds of the cyclohexane ring and hydrogenation. All of the chlorine atoms in the ?-HCH could be transformed into inorganic chloride compounds by the MC treatment with CaO. Our results indicate that ?-HCH can be completely dechlorinated by MC treatment. PMID:22055315

Nomura, Yugo; Fujiwara, Kazuo; Terada, Akihiko; Nakai, Satoshi; Hosomi, Masaaki

2012-01-01

165

Impacts of the 2010 Amazon drought on forest structure and function using CAO AToMS  

NASA Astrophysics Data System (ADS)

The 2010 Amazon mega-drought is thought to have had a widespread impact on forest condition, including tree mortality. However, no large-scale, high-resolution information exists on changes in forest structure, function, turnover or other processes in response to the drought. With the possibility of increasing drought frequency in the Amazon basin, it is now critical that we develop repeat, large-area studies to assess impacts and recovery. Using the Carnegie Airborne Observatory Airborne Taxonomic Mapping System (AToMS), we assessed the impacts of the 2010 drought by repeat flying of approximately 500,000 hectares of lowland humid tropical forest in the Peru Amazon. The CAO AToMS Visible-to-Near-Infrared (VNIR) and Visible-to-Shortwave-Infrared (VSWIR) imaging spectrometers recorded changes in forest canopy spectral, chemical and physiological state from 2009 to 2011. Areas of greatest functional change were observed near the Peru-Brazil border in areas under heavy forest use for selective logging. The CAO AToMS waveform Light Detection and Ranging (LiDAR) instruments measured highest rates of treefall and canopy gap formation in areas subjected to combined drought and logging, and on low fertility soils. The results provide the first spatially-explicit, large-scale and ecologically detailed information on the response of Amazonian forests to drought.

Asner, G. P.; Martin, R. E.; Knapp, D. E.; Kennedy-Bowdoin, T.; Kellner, J.

2012-12-01

166

MAGNETIC BEHAVIOR OF IRON IONS IN THE P2O5·CaO GLASS MATRIX  

NASA Astrophysics Data System (ADS)

The temperature dependence of the magnetic susceptibility of xFe2O3·(100-x)-[P2O5·CaO] glasses with 0CaO glass matrix, the Fe2+ ion content is higher than that of the Fe3+ ions for glasses with x?10 mol%. For the glasses with x>35 mol%, the evaluated values of the ?eff indicate either the presence of Fe+ ions or the coordination influence on the magnetic moment of iron ions, but the presence of small quantities of the antiferromagnetic or ferrimagnetic interactions between iron ions in studied temperature range cannot be excluded. The high temperature susceptibility results indicate that the iron ions are isolated or participate in dipole-dipole interactions for glasses with x?35 mol% and are antiferromagnetically coupled for higher contents of Fe2O3.

ARDELEAN, I.; ANDRONACHE, C.; P??CU??, P.

167

Development of natural crude drug resources from Taiwan (X). Pharmacognostical studies on the Chinese crude drug "han-lian-cao".  

PubMed

In a previous paper(1), it was reported that the drug "Han-lian-cao", in Taiwan was derived from the entire plant or aerial part of Eclipta prostrata L. and Alternanthera sessilis R. Brown. In this paper, the histological studies of "Han-lian-cao" derived from Wedelia and Hypericum plants, and of 3 species of Wedelia related plants distributed in Taiwan were made. The results showed that it was possible to classify these species by their external and internal characteristics. In addition, a key to the characteristics of the whole plants of Eclipta, Alternanthera, Wedelia and Hypericum plants are hereby given. PMID:1605130

Chen, J Y; Lin, C C; Namba, T

1992-01-01

168

On-line Electronic Homework: For summer 2013, we will be using some on-line homework problems through Sapling Learning.  

E-print Network

On-line Electronic Homework: For summer 2013, we will be using some on-line homework problems://web.mnstate.edu/jasperse/Chem341/Sapling%20OnLine%20Homework%20Initial%20Instructio ns%20v3.pdf · To connect to the website: http

Jasperse, Craig P.

169

On-line dating: is it a new 'computer virus'? Connection between on-line partners, risky sex.  

PubMed

A recent study shows a link between very high-risk sexual behavior and meeting sex partners on-line. Investigators theorize that the results may mean that traditional messages about the dangers of HIV are not reaching the younger, Internet-savvy crowd. But the study's results also may offer inspiration that the Internet itself might be a good medium to reach those people. PMID:12846195

2003-07-01

170

Exploring the ability of chlorophyll b to bind to the CP43? protein induced under iron deprivation in a mutant of Synechocystis PCC 6803 containing the cao gene  

Microsoft Academic Search

Cyanobacteria, unlike plants and green algae, do not contain chlorophyll (Chl) b. This is because of the absence of the cao gene which encodes the enzyme that catalyses a two step oxygenation of chlorophyllide a to chlorophyllide b. Recently, however, the cao gene of higher plants was engineered into Synechocystis PCC 6803 leading to Chl b synthesis in this cyanobacterium

James Duncan; Thomas Bibby; Ayumi Tanaka; James Barber

2003-01-01

171

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.

172

On-line monitoring and analysis of reactor vessel integrity  

SciTech Connect

A method is described for on-line monitoring and analysis of nuclear reactor pressure vessel integrity in a unit in which reactor coolant is circulated along the inner wall of the pressure vessel, the method comprising the steps of: generating on an on-line basis, temperature signals representative of the temperature of the reactor coolant circulating along the inner wall of the pressure vessel; generating on an on-line basis, a pressure signal representative of the reactor coolant pressure; generating a signal representative of fast neutron fluence to which the reactor pressure vessel has been subjected; generating as a function of the fluence signal a visual representation of the actual real time reference nil-ductibility transition temperature (RT/sub ndt/) across the entire pressure vessel wall thickness at a preselected critical location in the wall; generating as a function of transients in the reactor coolant temperature and pressur signals, a visual representation of the real time required RT/sub ndt/, across the entire pressure vessel wall thickness at the selected critical location, the required RT/sub ndt/ being the RT/sub ndt/ that would be required in the pressure vessel wall for flaw initiation to occur as a result of stresses set-up by the transients; and superimposing the visual representations of the real-time actual and required RT/sub ndt's/ for flaw initiation across the entire pressure vessel wall thickness for the selected critical location to generate a visual representation of the difference in value between the actual and required RT/sub ndt/ presented as an RT/sub ndt/ margin.

Ackerson, D.S.; Impink, A.J. Jr.; Balkey, K.R.; Andreychek, T.S.

1989-01-31

173

On-line pulse control for structural and mechanical systems  

NASA Technical Reports Server (NTRS)

This paper studies the feasibility of using open-loop adaptive on-line pulse control for limiting the response of large linear multidegree of freedom systems subjected to general dynamic loading environments. Pulses of short durations are used to control the system when the system response exceeds a given threshold level. The pulse magnitudes are obtained in closed form, leading to large computational efficiencies when compared with optimal control theoretic methods. The technique is illustrated for a structural system subjected to earthquake-like base excitations.

Udwadia, F. E.; Garba, J. A.; Tabaie, S.

1981-01-01

174

FOLDOC: Free On-Line Dictionary of Computing  

NSDL National Science Digital Library

A great concept/project started in 1985 by Denis Howe, the Free On-Line Dictionary of Computing (FOLDOC) now contains some 7900+ entires. It is a browsable and searchable dictionary of "acronyms, programming languages, tools, architectures, operating systems, networking, theory, mathematics, telecoms, institutions, companies, projects, products, history..." and etc. Definitions are voluntarily contributed by users and filtered through the editor. Following a search, the list of terms alphabetically nearest to the search pattern are displayed along with any cross-references--a bonus for the spelling-challenged user. Several mirror sites are provided.

175

GOLD⢠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.

176

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

1995-12-01

177

Compendium of On-Line Soil Survey Information  

NSDL National Science Digital Library

D.G. Rossiter from the International Institute for Geo-Information Science and Earth Observation has compiled the Compendium of On-Line Soil Survey Information. The Soil Survey Institutes & Activities page contains information about and links to soil survey institutes from around the world and the digital soil geographic databases they offer. Example institutes include Scotland's Macaulay Land Use Research Institute, Belgium's Research Team Laboratory for Soil and Water, Romania's Research Institute for Soil Science and Agrochemistry, the Natural Resources Conservation Service, and many more. Anyone conducting similar research or interested in worldwide soil information will surely appreciate this simple but helpful resource.

Rossiter, D.G. (David G.)

178

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

179

On line multitarget selection device with multiple facilities  

NASA Astrophysics Data System (ADS)

We have developed a multitarget holding device as a subsystem for atomic or nuclear physics experiments. A permanent magnet stepper motor rotates the device for target selection without breaking the vacuum. The target holder is potentially isolated from the rest of the system with the help of a Teflon block. The device and its controlled circuits are described below.

Roy, Subir; Das, Avijit; Ibomcha, N.; Bhandari, R. K.

2002-11-01

180

OCAO Computer Refreshment Policy The NOAA CAO is responsible for budgeting and procuring all personal computers and other  

E-print Network

6/20/2007 OCAO Computer Refreshment Policy Purpose: The NOAA CAO is responsible for budgeting and procuring all personal computers and other support computers used by OCAO staff. To facilitate adequate capital planning and clarify acquisition policies, the following Computer Refreshment Policy

181

Steam-Coal Gasification Using CaO and KOH for in Situ Carbon and Sulfur Capture  

E-print Network

Steam-Coal Gasification Using CaO and KOH for in Situ Carbon and Sulfur Capture Nicholas S. Siefert Virginia 26507, United States ABSTRACT: We present experimental results of coal gasification-coal gasification kinetic rate. The syngas composition from the gasifier was roughly 20% methane, 70% hydrogen

Litster, Shawn

182

Superconductivity in Iron Telluride Thin Films under Tensile Stress L. X. Cao,1,* X. Y. Wang,2  

E-print Network

Superconductivity in Iron Telluride Thin Films under Tensile Stress Y. Han,1 W. Y. Li,1 L. X. Cao,1 for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese a tensile stress state, superconductivity of 13 K was introduced into FeTe, a nonsuperconducting parent

Wang, Wei Hua

183

An Air Traffic Prediction Model based on Kernel Density Estimation Yi Cao,1 Lingsong Zhang,2 and Dengfeng Sun3  

E-print Network

through sophisticated flight dynamics [1]. However, for the Air Traffic Control Sys- tem Command Center at an Air Route Traffic Control Center (simply denoted as Center hereafter) level [2]. It forecasts aircraftAn Air Traffic Prediction Model based on Kernel Density Estimation Yi Cao,1 Lingsong Zhang,2

Sun, Dengfeng

184

A diameter distribution model for even-aged beech in Denmark Thomas Nord-Larsen a,*, Quang V. Cao b  

E-print Network

A diameter distribution model for even-aged beech in Denmark Thomas Nord-Larsen a,*, Quang V. Cao b 2006 Abstract We developed a diameter distribution model for even-aged stands of European beech in Denmark using the Weibull distribution. The model parameters were estimated using a large dataset from

Cao, Quang V.

185

Genetic structure of the invasive Chromolaena odorata W H YE, H P MU, H L CAO & X J GE  

E-print Network

Genetic structure of the invasive Chromolaena odorata in China W H YE, H P MU, H L CAO & X J GE as the main cause of the genetic structure observed in C. odorata. Keywords: biocontrol, Chromolaena odorata (L.) RM King and H. Robinson (Siam weed) is a perennial member of the Compositae family. This species

Brown, Cynthia S.

186

Polar On-Line Acquisition Relay and Transmission System (POLARATS)  

SciTech Connect

POLARATS (Polar On-Line Acquisition Relay And Transmission System) is being developed by YAHSGS LLC (YAHSGS) and Oak Ridge National Laboratory (ORNL) to provide remote, unattended monitoring of environmental parameters under harsh environmental conditions. In particular, instrumental design and engineering is oriented towards protection of human health in the Arctic, and with the additional goal of advancing Arctic education and research. POLARATS will obtain and transmit environmental data from hardened monitoring devices deployed in locations important to understanding atmospheric and aquatic pollutant migration as it is biomagnified in Arctic food chains. An Internet- and personal computer (PC)-based educational module will provide real time sensor data, on-line educational content, and will be integrated with workbooks and textbooks for use in middle and high school science programs. The educational elements of POLARATS include an Internet-based educational module that will instruct students in the use of the data and how those data fit into changing Arctic environments and food chains. POLARATS will: (1) Enable students, members of the community, and scientific researchers to monitor local environmental conditions in real time over the Internet; and (2) Provide additional educational benefits through integration with middle- and high-school science curricula. Information will be relayed from POLARATS devices to classrooms and libraries along with custom-designed POLARATS teaching materials that will be integrated into existing curricula to enhance the educational benefits realized from the information obtained.

Yuracko, K.

2004-07-15

187

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. PMID:22509160

Ybarra, Oscar; Winkielman, Piotr

2012-01-01

188

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

2012-01-01

189

Pulsed Neurton Elemental On-Line Material Analyzer  

DOEpatents

An on-line material analyzer which utilizes pulsed neutron generation in order to determine the composition of material flowing through the apparatus. The on-line elemental material analyzer is based on a pulsed neutron generator. The elements in the material interact with the fast and thermal neutrons produced from the pulsed generator. Spectra of gamma-rays produced from fast neutrons interacting with elements of the material are analyzed and stored separately from spectra produced from thermal neutron reactions. Measurements of neutron activation takes place separately from the above reactions and at a distance from the neutron generator. A primary passageway allows the material to flow through at a constant rate of speed and operators to provide data corresponding to fast and thermal neutron reactions. A secondary passageway meters the material to allow for neutron activation analysis. The apparatus also has the capability to determine the density of the flowed material. Finally, the apparatus continually utilizes a neutron detector in order to normalize the yield of the gamma ray detectors and thereby automatically calibrates and adjusts the spectra data for fluctuations in neutron generation.

Vourvopoulos, George (Bowling Green, KY)

2002-08-20

190

[Optimization of extracorporeal dialytic treatment: on-line hemodiafiltration].  

PubMed

The study evaluates the potential of high ultrafiltration on-line hemodialfiltration (HDF) as a means of achieving the goals of extracorporeal RDT: the removal of small and medium-sized molecules, vascular stability and biocompatibility. The removal of small molecules was correlated with the UF rate and therefore with reinfusate volume. Medium-sized molecules were only removed from high permeability synthetic membranes in HD, but to a greater extent in HDF because of higher absorption. Vascular stability during the dialytic session is improved by convective processes, as is confirmed by a low prevalence of arterial hypertension in HDF patients. This suggests that HDF facilitates the achievement of dry body weight and therefore an improved correction of hydrosaline retention which is the main cause of hypertension in RDT patients. The biocompatibility of the dialytic system depends on the membrane and the dialysate. Synthetic membranes were shown to be much less toxic than cellulosic membranes and ultrapure dialysate was a useful aid to reduce the risk of inflammatory stimuli. On-line HDF associated the value of low-cost sterile dialysate-reinfu sate with a highly efficient and well tolerated technique. PMID:11455320

Gonella, M; Calabrese, G; Pratesi, G; Mazzotta, A; Vagelli, G

2001-06-01

191

On-line condition monitoring applications in nuclear power plants  

SciTech Connect

Existing signals from process instruments in nuclear power plants can be sampled while the plant is operating and analyzed to verify the static and dynamic performance of process sensors, identify process-to-sensor problems, detect instrument anomalies such as venturi fouling, measure the vibration of the reactor vessel and its internals, or detect thermal hydraulic anomalies within the reactor coolant system. These applications are important in nuclear plants to satisfy a variety of objectives such as: 1) meeting the plant technical specification requirements; 2) complying with regulatory regulations; 3) guarding against equipment and process degradation; 4) providing a means for incipient failure detection and predictive maintenance; or 5) identifying the root cause of anomalies in equipment and plant processes. The technologies that are used to achieve these objectives are collectively referred to as 'on-line condition monitoring.' This paper presents a review of key elements of these technologies, provides examples of their use in nuclear power plants, and illustrates how they can be integrated into an on-line condition monitoring system for nuclear power plants. (authors)

Hastiemian, H. M. [Analysis and Measurement Services Corporation, Bldg. A-100, AMS 9111 Cross Park Drive, Knoxville, TN 37923 (United States); Feltus, M. A. [Office of Nuclear Energy, U.S. Dept. of Energy, 19901 Germantown Road, Germantown, MD 20874 (United States)

2006-07-01

192

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. PMID:15909338

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

2005-01-01

193

On-line diagnosis of sequential systems, 3  

NASA Technical Reports Server (NTRS)

A formal model is introduced which can serve as the basis for a theoretical investigation of on-line diagnosis. Within this model a fault of a system S is considered to be a transformation of S into another system S prime at some time tau. The resulting faulty system is taken to be the system which looks like S up to time tau and like S prime thereafter. The on-line diagnosis of systems which are structurally decomposed and represented as a network of smaller systems is also investigated. The fault set considered is the set of unrestricted component faults; namely, the set of faults which only affect one component of the network. A characterization of networks which can be diagnosed using a combinational detector is obtained. It is further shown that any network can be made diagnosable in the above sense through the addition of one component. In addition, a lower bound is obtained on the complexity of any component, the addition of which is sufficient to make a particular network combinationally diagnosable.

Sundstrom, R. J.

1975-01-01

194

Precise on-line position measurement for particle therapy  

NASA Astrophysics Data System (ADS)

An on-line beam position monitoring and regular beam stability tests are of utmost importance for the Quality Assurance (QA) of the patient treatment at any particle therapy facility. The Gantry 2 at the Paul Scherrer Institute uses a strip ionization chamber for the on-line beam position verification. The design of the strip chamber placed in the beam in front of the patient allows for a small beam penumbra in order to achieve a high-quality lateral beam delivery. The position error of 1 mm in a lateral plane (plane perpendicular to the beam direction) can result in a dose inhomogeneity of more than 5%. Therefore the goal of Gantry 2 commissioning was to reach a sub-millimeter level of the reconstruction accuracy in order to bring a dose uncertainty to a level of 1%. In fact, we observed that for beams offered by Gantry 2 signal profiles in a lateral plane can be reconstructed with a precision of 0.1 mm. This is a necessary criterion to perform a reliable patient treatment. The front end electronics and the whole data processing sequence have been optimized for minimizing the dead time in between two consecutive spots to about 2 ms: the charge collection is performed in about 1 ms, read-out takes place in about 100?s while data verification and logging are completed in less than 1 ms.

Actis, O.; Meer, D.; König, S.

2014-12-01

195

On-line screening of airborne PAH contamination by simultaneous multiphoton ionization and laser induced fluorescence  

SciTech Connect

In this preliminary study, the feasibility of on-line monitoring of sub-micron polycyclic aromatic hydrocarbon (PAH) aerosols by a combination of laser-induced-fluorescence (LIF) and laser multiphoton ionization (LMPI) techniques was investigated. For this purpose, an aerosol contaminated nitrogen gas was slowly bubbled through a quartz measurement chamber filled with hexane. Continuous PAH monitoring was maintained over two hours of the resultant concentration process. Simultaneous LIF and LMPI excitation was achieved by a pulsed dye laser, operated at 283 nm. For this wavelength, pyrene and naphthalene aerosols were used as target PAH materials. The resultant fluorescence light was collected by an optical fiber, while the LMPI signals were acquired by a pair of stainless steel electrodes immersed in the solution, allowing an automated readout of the photoionization current. The results indicate that PAH sub-micron aerosols, at an air concentration of 1 mg/m{sup 3}, can be monitored in this way.

Gridin, V.V.; Inoue, Takanori; Ogawa, Teiichiro; Schechter, I.

2000-04-01

196

Phonon-Mediated Electron Transport through CaO Thin Films  

NASA Astrophysics Data System (ADS)

Scanning tunneling microscopy has developed into a powerful tool for the characterization of conductive surfaces, for which the overlap of tip and sample wave functions determines the image contrast. On insulating layers, as the CaO thin film grown on Mo(001) investigated here, direct overlap between initial and final states is not enabled anymore and electrons are transported via hopping through the conduction-band states of the oxide. Carrier transport is accompanied by strong phonon excitations in this case, imprinting an oscillatory signature on the differential conductance spectra of the system. The phonons show a characteristic spatial dependence and become softer around lattice irregularities in the oxide film, such as dislocation lines.

Cui, Yi; Tosoni, Sergio; Schneider, Wolf-Dieter; Pacchioni, Gianfranco; Nilius, Niklas; Freund, Hans-Joachim

2015-01-01

197

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

198

Cathodic behavior of molten CaCl2-CaO and CaCl2-NaCl-CaO  

NASA Astrophysics Data System (ADS)

The cathodic behavior of molten CaCl2, CaCl2-CaO and equimolar CaCl2-NaCl-CaO was studied by cyclic voltammograms and constant potential polarization at temperatures of 1123 to 1173 K on molybdenum and titanium electrodes. The diffusion coefficient of Ca2+ (CaO) in molten CaCl2-CaO was calculated from the linear relationship between the square root of scan rate and the peak current density. The deposition potentials and the potential temperature coefficient of CaO in molten CaCl2-0.5mol%CaO and CaCl2-NaCl-0.5mol%CaO were also obtained from their cyclic voltammograms. The result shows that CaO is more easily reduced than CaCl2. The addition of NaCl in molten CaCl2-CaO induces the underpotential electrodeposition of CaO.

Wang, Shu-Lan; Wang, Wei; Li, Shi-Chao; Cao, Shan-Hui

2010-12-01

199

On-line monitoring system for downhole temperature and pressure  

NASA Astrophysics Data System (ADS)

To overcome the downhole space limitation, eccentric tubing was designed. Two fiber Bragg grating (FBG) sensors written in one optical fiber were integrated into the specially designed tubing to form an on-line monitoring system, and a protective casing was designed to isolate the FBG sensors from the harsh environment. The wavelengths of the FBGs were recorded at certain temperatures and pressures in order to calibrate the temperature and pressure sensitivity, respectively. Both the temperature and the pressure exhibit good linear relationships with the wavelengths of the FBGs, which suggest that they can be represented as a function of the wavelength and generated via a data analysis system. The good linear relationships also proved that the sensing area was well sealed. The temperature was measured by the FBG sensor and a thermocouple at the same time, and good agreement was found between these results, validating the credibility of this system.

Shou, Ma; Jianchun, Guo; Yanli, Guo; Jun, Cao; Boming, Zhang

2014-08-01

200

Enabling the On-line Intrinsic Evolution of Analog Controllers  

NASA Technical Reports Server (NTRS)

The intrinsic evolution of analog controllers to provide closed-loop control of the speed of a DC motor has been previously demonstrated at NASA Marshall Space Flight Center. A side effect of the evolutionary process is that during evolution there are necessarily poor configurations to be evaluated that could cause damage to the plant, This paper concerns the development and implementation of a safe Evolvable Analog Controller (EAC) architecture able to evolve controllers on-line even in the presence of these poor configurations, The EAC concept is discussed and experimental results are presented that show the feasibility of the approach This EAC architecture represents the first in a series of steps required to make deployment of an evolvable controller a reality.

Gwaltney, David A.; Ferguson, Michael I.

2005-01-01

201

Enabling the On-Line Intrinsic Evolution of Analog Controllers  

NASA Technical Reports Server (NTRS)

The intrinsic evolution of analog controllers to provide closed-loop control of the speed of a DC motor has been previously demonstrated at NASA Marshall Space Flight Center. A side fleet of the evolutionary process is that during evolution there are necessarily poor configurations to be evaluated that could cause damage to the plant. This paper concern the development and implementation of a safe Evolvable Analog Controller (EAC) architecture able to evolve controllers on-line even in the presence of these poor configurations. The EAC concept is discussed and experimental results are presented that show the feasibility of the approach This EAC architecture represents the first in a series of steps required to make deployment of an evolvable controller a reality.

Gwaltney, David A.; Ferguson, Michael I.

2005-01-01

202

[Development of an on-line course on medication administration].  

PubMed

The study describes the development of an on-line course on medication administration. The World Wide Web Course Tools (WebCT) that was used is software that provides various tools for supervisors and access to a number of environments for students who have a password. The course material is presented in a series of websites which are sub-divided into eight illustrated topics concerning medication administration routes, in addition to questions for knowledge assessment. A sample of undergraduate students at the University of São Paulo at Ribeirão Preto College of Nursing has positively evaluated the course. It is now intended to be included as curricular course in the undergraduate program as an additional resource for student learning. PMID:14686047

Cassiani, Silvia Helena; Benfati, Flávia Borges; Dias, Denise Costa; Zem-Mascarenhas, Silvia Helena; Zanetti, Maria Lúcia

2003-09-01

203

An on-line computer system for histopathology reporting.  

PubMed

An on-line computer system was developed for issuing histopathology reports as part of an integrated hospital information system. Input is through a Cossor visual display unit with a typewriter keyboard to a Univac 418 III computer. Stored information is available to authorised hospital staff via similar visual display units located in the wards and laboratories. Existing programs and computer staff were used to provide the new service. It has resulted in better method, speedier communication, and saving of laboratory staff time. The system has yet to be fully tested but initial reactions are favourable and indicate that the investment in computer staff time and extra laboratory equipment will be cost effective. PMID:604358

Codling, B W; Macartney, J C; Curran, R C

1977-12-01

204

An expert system to perform on-line controller tuning  

NASA Technical Reports Server (NTRS)

An expert system which tunes a Proportional-Integral-Derivative (PID) controller on-line for a single-input-single-output multiple-lag process with dead time is described. The expert system examines features of the previous transient responses and their corresponding sets of controller parameters. It determines a new set of controller gains to obtain a more desirable time response. This technique can be used to determine and implement a different set of PID gains for each operating regime and, once in steady state, the system can be used to find optimal parameters for load disturbance rejection. The expert system can be applied to any system of the specified form (aerospace, industrial, etc.) and can be expanded to include additional process models.

Litt, Jonathan S.

1990-01-01

205

On line quantification of crystal surfaces by stereo imaging  

NASA Technical Reports Server (NTRS)

The shape of an interface while a crystal is growing inside a crystal growth furnace is an important measurement to assess the crystal quality on-line. If the crystal surface can be visualized by video or x ray imaging, the interface shape can be determined by the stereo image processing techniques. This paper presents a methodology to determine the shape of the solid-melt interface by stereo based imaging techniques while the crystal is growing inside a transparent furnace. The methodology generates qualitative shape information provided that a good pair of stereo images of the interface can be captured. For a quantitative shape description, i.e., for the determination of interface points with respect to a fixed coordinate frame, both cameras must be calibrated. This paper illustrates the methodology for qualitative shape determination of lead bromide crystal interface.

Batur, Celal

1992-01-01

206

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.

207

Continuous on-line measurement of lignin in wood pulp  

NASA Astrophysics Data System (ADS)

We are working toward the development of an instrument for the continuous on-line measurement of the lignin concentration in wood pulp. The system will be used as a primary sensor for process control in the pulp and paper industry. The measurement is based on the fluorescence properties of lignin. The instrument will use an optical fiber probe to separate the light generation, detection, and analysis equipment from the hostile process environment. To provide the background data necessary for the design of the instrument, we have characterized the fluorescence properties of lignin bound to wood pulp. A nitrogen laser was used as the excitation source and an intensified photodetector array capable of fast grating was used to obtain time-resolved fluorescence spectra.

Jeffers, Larry A.; Malito, Michael L.

1992-03-01

208

CIRCAL-2 - General-purpose on-line circuit design.  

NASA Technical Reports Server (NTRS)

CIRCAL-2 is a second-generation general-purpose on-line circuit-design program with the following main features: (1) multiple-analysis capability; (2) uniform and general data structures for handling text editing, network representations, and output results, regardless of analysis; (3) special techniques and structures for minimizing and controlling user-program interaction; (4) use of functionals for the description of hysteresis and heat effects; and (5) ability to define optimization procedures that 'replace' the user. The paper discusses the organization of CIRCAL-2, the aforementioned main features, and their consequences, such as a set of network elements and models general enough for most analyses and a set of functions tailored to circuit-design requirements. The presentation is descriptive, concentrating on conceptual rather than on program implementation details.

Dertouzos, M. L.; Jessel, G. P.; Stinger, J. R.

1972-01-01

209

On-Line Robust Modal Stability Prediction using Wavelet Processing  

NASA Technical Reports Server (NTRS)

Wavelet analysis for filtering and system identification has been used to improve the estimation of aeroservoelastic stability margins. The conservatism of the robust stability margins is reduced with parametric and nonparametric time- frequency analysis of flight data in the model validation process. Nonparametric wavelet processing of data is used to reduce the effects of external disturbances and unmodeled dynamics. Parametric estimates of modal stability are also extracted using the wavelet transform. Computation of robust stability margins for stability boundary prediction depends on uncertainty descriptions derived from the data for model validation. The F-18 High Alpha Research Vehicle aeroservoelastic flight test data demonstrates improved robust stability prediction by extension of the stability boundary beyond the flight regime. Guidelines and computation times are presented to show the efficiency and practical aspects of these procedures for on-line implementation. Feasibility of the method is shown for processing flight data from time- varying nonstationary test points.

Brenner, Martin J.; Lind, Rick

1998-01-01

210

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.

211

Towards large scale multi-target tracking  

NASA Astrophysics Data System (ADS)

Multi-target tracking is intrinsically an NP-hard problem and the complexity of multi-target tracking solutions usually do not scale gracefully with problem size. Multi-target tracking for on-line applications involving a large number of targets is extremely challenging. This article demonstrates the capability of the random finite set approach to provide large scale multi-target tracking algorithms. In particular it is shown that an approximate filter known as the labeled multi-Bernoulli filter can simultaneously track one thousand five hundred targets in clutter on a standard laptop computer.

Vo, Ba-Ngu; Vo, Ba-Tuong; Reuter, Stephan; Lam, Quang; Dietmayer, Klaus

2014-06-01

212

State of the art in on-line techniques coupled to flow injection analysis FIA/on-line- a critical review  

PubMed Central

Flow injection analysis (FIA) has emerged as an increasingly used laboratory tool in chemical analysis. Employment of the technique for on-line sample treatment and on-line measurement in chemical process control is a growing trend. This article reviews the recent applications of FlA. Most papers refer to on-line sample treatment. Although FIA is very well suited to continuous on-line process monitoring, few examples have been found in this areamost of them have been applied to water treatment or fermentation processes. PMID:18925271

Puchades, R.; Maquieira, A.; Atienza, J.; Herrero, M. A.

1990-01-01

213

RECOMMENDED PRACTICES FOR ON-LINE MEASUREMENT OF RESIDUAL CHLORINE IN WASTEWATERS  

EPA Science Inventory

This document provides users with information that assists them in specifying, installing, calibrating, maintaining and monitoring the subsequent performance of on-line residual chlorine analyzers in wastewater treatment plants. An on-line residual chlorine analyzer must have, am...

214

On-line Discussions: Can Participation be Linked to Enhanced Performance? Teresa Larkin-Hein  

E-print Network

On-line Discussions: Can Participation be Linked to Enhanced Performance? Teresa Larkin to participate in on-line discussions outside of class? (2) Can student participation in on-line discussions be linked to enhanced classroom performance? (3) Can student motivation and performance be linked

Larkin, Teresa L.

215

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

216

An on-line Estimation Procedure for Cell-Loss Probabilities in ATM links  

E-print Network

An on-line Estimation Procedure for Cell-Loss Probabilities in ATM links Costas Courcoubetis.g., cell-loss rates of the order of 10?6 ?10?9 ), any direct brute-force on-line estimation procedure would , George Fouskas and Richard Webery Abstract We present a methodology for the on-line estimation

Weber, Richard

217

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

2006-09-22

218

The influence of E-shopping on Shopping Travel: Evidence from Twin Xinyu (Jason) Cao  

E-print Network

-store shopping. An on-line survey composed of direct and attitudinal questions was used to obtain the data-demographics. The preliminary results showed that e-shopping behavior (in terms of online searching and online buying) tends has reshaped consumers' shopping behavior. Online buying could be a substitute for traditional

Levinson, David M.

219

UCSF Class/Course SchedulingUCSF Class/Course Scheduling On-Line Resources forOn-Line Resources for  

E-print Network

UCSF Class/Course SchedulingUCSF Class/Course Scheduling On-Line Resources forOn-Line ResourcesLocations (Room Assignments)(Room Assignments) (Effective Fall Quarter 2013) #12;UCSF Class/Course SchedulingUCSF Class/Course Scheduling 1. From the Nursing Student Resources web page (http

Klein, Ophir

220

5.2 Embodied, On-line, On-board Evolution for Autonomous Robotics 367 5.2 Embodied, On-line, On-board Evolution for Autonomous  

E-print Network

5.2 Embodied, On-line, On-board Evolution for Autonomous Robotics 367 5.2 Embodied, On-line, On-board Evolution for Autonomous Robotics A.E. Eiben, Evert Haasdijk, Nicolas Bred`eche Artificial evolution plays controller. In these applications the human designers/experimenters orchestrate and manage the whole

Eiben, A.E. "Guszti"

221

Improving on-line information for potential living kidney donors.  

PubMed

Individuals who consider becoming living kidney donors often search the internet for reliable information before contacting the transplant center. The quality of such information requires due consideration. Using the search engines Google and Yahoo and the WebMD information portal, two reviewers independently abstracted data on the classification, readability, and general quality of websites. The coverage and accuracy of each site's discussion of the risks, benefits, and process of living donation was also assessed against a checklist of recommended information. Eighty-six unique websites on living kidney donation were found. Most were created by transplant programs and transplant organizations. Although the content of most sites was accurate, almost all (98%) were written above the recommended patient reading level (i.e., fifth grade). On average, each site covered 38% of the recommended information on living donation (range 8-76%). Educational topics of potential long-term medical risks, psychological risks, and expected benefits to the donor were often missing. The most visited websites were often not ranked among the best sites to provide information. By better understanding the nature of on-line information, transplant professionals can direct their patients to the best available websites. Local educational efforts, including the effective use of internet resources, will ensure living donation and complete understanding of the risks by potential donors and recipients. PMID:17361119

Moody, E M; Clemens, K K; Storsley, L; Waterman, A; Parikh, C R; Garg, A X

2007-05-01

222

Virtual laboratories: Collaborative environments and facilities-on-line  

SciTech Connect

The Department of Energy (DOE) has major research laboratories in a number of locations in the US, typically co-located with large research instruments or research facilities valued at tens of millions to even billions of dollars. Present budget exigencies facing the entire nation are felt very deeply at DOE, just as elsewhere. Advances over the last few years in networking and computing technologies make virtual collaborative environments and conduct of experiments over the internetwork structure a possibility. The authors believe that development of these collaborative environments and facilities-on-line could lead to a ``virtual laboratory`` with tremendous potential for decreasing the costs of research and increasing the productivity of their capital investment in research facilities. The majority of these cost savings would be due to increased productivity of their research efforts, better utilization of resources and facilities, and avoiding duplication of expensive facilities. A vision of how this might all fit together and a discussion of the infrastructure necessary to enable these developments is presented.

Thomas, C.E. Jr. [Oak Ridge National Lab., TN (United States). I and C Div.; Cavallini, J.S.; Seweryniak, G.R.; Kitchens, T.A.; Hitchcock, D.A.; Scott, M.A.; Welch, L.C. [Dept. of Energy, Germantown, MD (United States). Mathematical Information, and Computational Sciences Div.; Aiken, R.J. [Dept. of Energy, Germantown, MD (United States). Mathematical Information, and Computational Sciences Div.]|[Lawrence Livermore National Lab., CA (United States); Stevens, R.L. [Argonne National Lab., IL (United States). Mathematics and Computer Sciences Div.

1995-07-01

223

On-line DNA analysis system with rapid thermal cycling  

DOEpatents

This application describes an apparatus particularly suited for subjecting biological samples to any necessary sample preparation tasks, subjecting the sample to rapid thermal cycling, and then subjecting the sample to subsequent on-line analysis using one or more of a number of analytical techniques. The apparatus includes a chromatography device including an injection means, a chromatography pump, and a chromatography column. In addition, the apparatus also contains a capillary electrophoresis device consisting of a capillary electrophoresis column with an inlet and outlet end, a means of injection, and means of applying a high voltage to cause the differential migration of species of interest through the capillary column. Effluent from the liquid chromatography column passes over the inlet end of the capillary electrophoresis column through a tee structure and when the loading of the capillary electrophoresis column is desired, a voltage supply is activated at a precise voltage and polarity over a specific duration to cause sample species to be diverted from the flowing stream to the capillary electrophoresis column. A laser induced fluorescence detector preferably is used to analyze the products separated while in the electrophoresis column. 6 figs.

Swerdlow, H.P.; Wittwer, C.T.

1999-08-10

224

On-line monitoring of methane in sewer air  

PubMed Central

Methane is a highly potent greenhouse gas and contributes significantly to climate change. Recent studies have shown significant methane production in sewers. The studies conducted so far have relied on manual sampling followed by off-line laboratory-based chromatography analysis. These methods are labor-intensive when measuring methane emissions from a large number of sewers, and do not capture the dynamic variations in methane production. In this study, we investigated the suitability of infrared spectroscopy-based on-line methane sensors for measuring methane in humid and condensing sewer air. Two such sensors were comprehensively tested in the laboratory. Both sensors displayed high linearity (R2 > 0.999), with a detection limit of 0.023% and 0.110% by volume, respectively. Both sensors were robust against ambient temperature variations in the range of 5 to 35°C. While one sensor was robust against humidity variations, the other was found to be significantly affected by humidity. However, the problem was solved by equipping the sensor with a heating unit to increase the sensor surface temperature to 35°C. Field studies at three sites confirmed the performance and accuracy of the sensors when applied to actual sewer conditions, and revealed substantial and highly dynamic methane concentrations in sewer air. PMID:25319343

Liu, Yiwen; Sharma, Keshab R.; Murthy, Sudhir; Johnson, Ian; Evans, Ted; Yuan, Zhiguo

2014-01-01

225

On-Line Loss of Control Detection Using Wavelets  

NASA Technical Reports Server (NTRS)

Wavelet transforms are used for on-line detection of aircraft loss of control. Wavelet transforms are compared with Fourier transform methods and shown to more rapidly detect changes in the vehicle dynamics. This faster response is due to a time window that decreases in length as the frequency increases. New wavelets are defined that further decrease the detection time by skewing the shape of the envelope. The wavelets are used for power spectrum and transfer function estimation. Smoothing is used to tradeoff the variance of the estimate with detection time. Wavelets are also used as front-end to the eigensystem reconstruction algorithm. Stability metrics are estimated from the frequency response and models, and it is these metrics that are used for loss of control detection. A Matlab toolbox was developed for post-processing simulation and flight data using the wavelet analysis methods. A subset of these methods was implemented in real time and named the Loss of Control Analysis Tool Set or LOCATS. A manual control experiment was conducted using a hardware-in-the-loop simulator for a large transport aircraft, in which the real time performance of LOCATS was demonstrated. The next step is to use these wavelet analysis tools for flight test support.

Brenner, Martin J. (Technical Monitor); Thompson, Peter M.; Klyde, David H.; Bachelder, Edward N.; Rosenthal, Theodore J.

2005-01-01

226

On-line range images registration with GPGPU  

NASA Astrophysics Data System (ADS)

This paper concerns implementation of algorithms in the two important aspects of modern 3D data processing: data registration and segmentation. Solution proposed for the first topic is based on the 3D space decomposition, while the latter on image processing and local neighbourhood search. Data processing is implemented by using NVIDIA compute unified device architecture (NIVIDIA CUDA) parallel computation. The result of the segmentation is a coloured map where different colours correspond to different objects, such as walls, floor and stairs. The research is related to the problem of collecting 3D data with a RGB-D camera mounted on a rotated head, to be used in mobile robot applications. Performance of the data registration algorithm is aimed for on-line processing. The iterative closest point (ICP) approach is chosen as a registration method. Computations are based on the parallel fast nearest neighbour search. This procedure decomposes 3D space into cubic buckets and, therefore, the time of the matching is deterministic. First technique of the data segmentation uses accele-rometers integrated with a RGB-D sensor to obtain rotation compensation and image processing method for defining pre-requisites of the known categories. The second technique uses the adapted nearest neighbour search procedure for obtaining normal vectors for each range point.

B?dkowski, J.; Naruniec, J.

2013-03-01

227

Enterprise utilization of "always on-line" diagnostic study archive.  

PubMed

To meet demands for enterprise image distribution, an "always on-line" image storage archive architecture was implemented before soft copy interpretation. It was presumed that instant availability of historical diagnostic studies would elicit a substantial utilization. Beginning November 1, 2000 an enterprise distribution archive was activated (Stentor, SanFrancisco, CA). As of August 8, 2001, 83,052 studies were available for immediate access without the need for retrieval from long-term archive. Image storage and retrieval logs for the period from June 12, 2001 to August 8, 2001 were analyzed. A total of 41,337 retrieval requests were noted for the 83,052 studies available as August 8, 2001. Computed radiography represented 16.8% of retrieval requests; digital radiography, 16.9%; computed tomography (CT), 44.5%; magnetic resonance (MR), 19.2%; and ultrasonography, 2.6%. A total of 51.5% of study retrievals were for studies less than 72 hours old. Study requests for cases greater than 100 days old represented 9.9% of all accessions, 9.7% of CT accessions, and 15.4% of MR accessions. Utilization of the archive indicates a substantial proportion of study retrievals for studies less than 72 hours after study completion. However, significant interest in historical CT and MR examinations was shown. PMID:12105703

McEnery, Kevin W; Suitor, Charles T; Thompson, Stephen K; Shepard, Jeffrey S; Murphy, William A

2002-01-01

228

Laser Ultrasonic System for On-Line Steel Tube Gauging  

NASA Astrophysics Data System (ADS)

A laser-ultrasonic system has been installed on a seamless tubing production line of The Timken Company and is being used to measure on-line the wall thickness of tubes during processing. The seamless process consists essentially in forcing a mandrel through a hot cylindrical billet in rotation and typically results in fairly large wall thickness variations that should be minimized and controlled to respect specifications. The system includes a Q-switched Nd-YAG laser for generation of ultrasound by ablation, a long pulse very stable Nd-YAG laser for detection coupled to a confocal Fabry-Perot interferometer, a pyrometer to measure tube temperature and two laser Doppler velocimeters to measure the coordinates of the probing location at the tube surface. The laser, data acquisition and processing units are housed in a cabin off line and connected to a front coupling head located over the passing tube by optical fibers. The system has been integrated into the plant computer network and provides in real time thickness data to the plant operators. It allow much faster mill setups, has been used since its deployment for inspecting more than 100,000 tubes and has demonstrated very significant savings.

Monchalin, Jean-Pierre; Choquet, Marc; Padioleau, Christian; Néron, Christian; Lévesque, Daniel; Blouin, Alain; Corbeil, Christian; Talbot, Richard; Bendada, Abdelhakim; Lamontagne, Mario; Kolarik, Robert V.; Jeskey, Gerald V.; Dominik, Erich D.; Duly, Larry J.; Samblanet, Kenneth J.; Agger, Steven E.; Roush, Kenneth J.; Mester, Michael L.

2003-03-01

229

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

230

On-line performance monitoring of SEGS VI and VII  

SciTech Connect

Kramer Junction Company Operating Company (KJCOC) contracted Black and Veatch to provide an on-line performance monitoring system for the Solar Electric Generating System (SEGS) VI and VII in March of 1995. Black and Veatch began with their existing product, OPM, which has been installed on over 80 fossil-fueled plants since 1987. However, the basic OPM system did not meet the needs of SEGS plant staff without modifications. This paper describes the capability of OPM and the developments which have been necessary to address the requirements of the SEGS plants and operating staff. Solar-only, boiler-only, and hybrid modes of plant operation required modifications to produce valuable information for use in operation. In addition to different modes of operation, the model required changes to consider the solar field, heat transfer fluid (HTF) pumps, and heat exchangers. Finally, daily cycling of the plant required consistent, accurate information over an extremely wide load range. These developments, screens, and reports used by the SEGS staff, and a summary of early operating experience with the OPM system, will be presented.

Jonas, T.S.; Craig, N.C.; Shouse, J.K.; Leonard, R.A.; Cable, R.G.

1996-12-31

231

Building collaboration tools and access to on-line facilities  

SciTech Connect

Network-based facilities will allow researchers at different locations to collaborate on experiments as if they all were together in the same laboratory. The expected value of these geographically distributed environments includes substantially increased effectiveness in doing science, and an enabling capability for analytical and high-value production use by industry. The Distributed, Collaboratory Experiment Environments (DCEE) Program consists of four projects that were established to build prototype remote experiment and collaborative environments. The work undertaken in this project represents some of the research and development of the mechanisms and infrastructure required to make collaboratories a reality. Some of these mechanisms have already been developed. Several other mechanisms, such as data dissemination, resource management for the sharing of experiment control, safety and security, electronic notebooks, elements of telepresence, and integrated user interfaces need further research and development. The pilot application for these collaborative tools is the Advanced Light Source (ALS) Beamline 7.0 at the Ernest Orlando Lawrence Berkeley Laboratory. The ALS is a particle accelerator and is a source of very high brilliance soft X-ray beams. One experimental facility is the Spectro-Microscopy Facility Beamline 7.0. Through this project, the Spectro-Microscopy Facility will be opened up to users from a wide range of organizations. The goal is to build software that will not only put the ALS Beamline 7.0 on-line, but will also serve as building blocks for future collaboratory development.

Agarwal, D.; Sachs, S.

1996-11-01

232

On-line DNA analysis system with rapid thermal cycling  

DOEpatents

An apparatus particularly suited for subjecting biological samples to any necessary sample preparation tasks, subjecting the sample to rapid thermal cycling, and then subjecting the sample to subsequent on-line analysis using one or more of a number of analytical techniques. The apparatus includes a chromatography device including an injection means, a chromatography pump, and a chromatography column. In addition, the apparatus also contains a capillary electrophoresis device consisting of a capillary electrophoresis column with an inlet and outlet end, a means of injection, and means of applying a high voltage to cause the differential migration of species of interest through the capillary column. Effluent from the liquid chromatography column passes over the inlet end of the capillary electrophoresis column through a tee structure and when the loading of the capillary electrophoresis column is desired, a voltage supply is activated at a precise voltage and polarity over a specific duration to cause sample species to be diverted from the flowing stream to the capillary electrophoresis column. A laser induced fluorescence detector preferably is used to analyze the products separated while in the electrophoresis column.

Swerdlow, Harold P. (Salt Lake City, UT); Wittwer, Carl T. (Salt Lake City, UT)

1999-01-01

233

Biodiesel production from transesterification of palm oil with methanol over CaO supported on bimodal meso-macroporous silica catalyst.  

PubMed

Calcium oxide-loaded porous materials have shown promise as catalysts in transesterification. However, the slow diffusion of bulky triglycerides through the pores limited the activity of calcium oxide (CaO). In this work, bimodal meso-macroporous silica was used as a support to enhance the accessibility of the CaO dispersed inside the pores. Unimodal porous silica having the identical mesopore diameter was employed for the purpose of comparison. Effects of CaO content and catalyst pellet size on the yield of fatty acid methyl esters (FAME) were investigated. The basic strength was found to increase with increasing the CaO content. The CaO-loaded bimodal porous silica catalyst with the pellet size of 325?m achieved a high %FAME of 94.15 in the first cycle, and retained an excellent %FAME of 88.87 after five consecutive cycles. PMID:24525218

Witoon, Thongthai; Bumrungsalee, Sittisut; Vathavanichkul, Peerawut; Palitsakun, Supaphorn; Saisriyoot, Maythee; Faungnawakij, Kajornsak

2014-03-01

234

Crossover from two- to three-dimensional gold particle shapes on CaO films of different thicknesses  

NASA Astrophysics Data System (ADS)

The growth of Au particles on Mo(001)-supported CaO films has been investigated as a function of film thickness by means of scanning tunneling microscopy and spectroscopy. Whereas, monolayer Au islands develop in the low-thickness regime [1-25 monolayers (ML)], formation of three-dimensional (3D) deposits is revealed above 40-ML film thickness. The two-dimensional (2D) growth morphology is ascribed to a charge transfer out of the CaO/Mo support into the adparticles, resulting in a reinforcement of the Au-CaO interface interaction and a strong preference for a wetting growth of gold. In the limit of ultrathin films, this charge transfer is governed by electron tunneling from the Mo substrate into the Au islands and is driven by the different Fermi levels of both systems. Although tunneling transport breaks down beyond 5-10-ML film thickness, the signature of charge-mediated Au growth remains detectable for even thicker films. This finding suggests the presence of intrinsic charge centers in the CaO film that are able to donate electrons to the gold. We relate these donor centers to Mo ions that spontaneously have diffused from the Mo support into the CaO lattice during growth. Given the low mobility of Mo in the oxide matrix, the donor concentration diminishes with film thickness and, hence, the ability of the CaO to transfer electrons into the Au deposits. Consequently, the 2D growth behavior of Au changes into the 3D regime that is characteristic for metals on inert oxide surfaces. Spectroscopic characterization of the Au particles revealed pronounced electron quantization and Coulomb charging effects due to the reduced island size.

Shao, Xiang; Nilius, Niklas; Freund, Hans-Joachim

2012-03-01

235

CAOS - the new high resolution spectrograph for the 0.91m telescope at Serra La Nave .  

NASA Astrophysics Data System (ADS)

We report on the status of the new high-resolution spectrograph CAOS under construction for the 0.91m telescope at Serra La Nave, Italy. Starting from defined scientific motivations, we derived the best instrumental requirements to meet observational goals within typical constraints like good performances and reduced overall cost. The new instrument will be able to enlarge present observational research activity at INAF-OACt, allowing spectropolarimetry at high S/N ratios.

Spanò, P.; Leone, F.; Bruno, P.; Catalano, S.; Martinetti, E.; Scuderi, S.

236

Liaoxia Cao et S.Q. Wu (Gnetales): ephedroids from the Early Cretaceous Yixian Formation in Liaoning, northeastern China  

Microsoft Academic Search

Gnetalean compression-impression fossils are described from the Early Cretaceous Yixian Formation, Liaoning Province, north-eastern\\u000a China, and assigned to six species of Liaoxia Cao et S.Q. Wu. The fossils have opposite-decussate phyllotaxis and cones comprising 2–12 pairs of bracts. Ovulate cones\\u000a have seeds typically in a distal position. The species differ from each other and from previously described fossils in the

C. Rydin; S. Q. Wu; E. M. Friis

2006-01-01

237

The 1-way on-line coupled atmospheric chemistry model system MECO(n) - Part 2: On-line coupling  

NASA Astrophysics Data System (ADS)

A new, highly flexible model system for the seamless dynamical down-scaling of meteorological and chemical processes from the global to the meso-? scale is presented. A global model and a cascade of an arbitrary number of limited-area model instances run concurrently in the same parallel environment, in which the coarser grained instances provide the boundary data for the finer grained instances. Thus, disk-space intensive and time consuming intermediate and pre-processing steps are entirely avoided and the time interpolation errors of common off-line nesting approaches are minimised. More specifically, the regional model COSMO of the German Weather Service (DWD) is nested on-line into the atmospheric general circulation model ECHAM5 within the Modular Earth Submodel System (MESSy) framework. ECHAM5 and COSMO have previously been equipped with the MESSy infrastructure, implying that the same process formulations (MESSy submodels) are available for both models. This guarantees the highest degree of achievable consistency, between both, the meteorological and chemical conditions at the domain boundaries of the nested limited-area model, and between the process formulations on all scales. The on-line nesting of the different models is established by a client-server approach with the newly developed Multi-Model-Driver (MMD), an additional component of the MESSy infrastructure. With MMD an arbitrary number of model instances can be run concurrently within the same message passing interface (MPI) environment, the respective coarser model (either global or regional) is the server for the nested finer (regional) client model, i.e., it provides the data required to calculate the initial and boundary fields to the client model. On-line nesting means that the coupled (client-server) models exchange their data via the computer memory, in contrast to the data exchange via files on disk in common off-line nesting approaches. MMD consists of a library (Fortran95 and some parts in C) which is based on the MPI standard and two new MESSy submodels, MMDSERV and MMDCLNT (both Fortran95) for the server and client models, respectively. MMDCLNT contains a further sub-submodel, INT2COSMO, for the interpolation of the coarse grid data provided by the server models (either ECHAM5/MESSy or COSMO/MESSy) to the grid of the respective client model (COSMO/MESSy). INT2COSMO is based on the off-line pre-processing tool INT2LM provided by the DWD. The new achievements allow the setup of model cascades for zooming (down-scaling) from the global scale to the lower edge of the meso-? scale (?1 km) with a very high degree of consistency between the different models and between the chemical and meteorological boundary conditions.

Kerkweg, A.; Jöckel, P.

2011-06-01

238

Entangled quantum electronic wavefunctions of the Mn4CaO5 cluster in photosystem II  

NASA Astrophysics Data System (ADS)

It is a long-standing goal to understand the reaction mechanisms of catalytic metalloenzymes at an entangled many-electron level, but this is hampered by the exponential complexity of quantum mechanics. Here, by exploiting the special structure of physical quantum states and using the density matrix renormalization group, we compute near-exact many-electron wavefunctions of the Mn4CaO5 cluster of photosystem II, with more than 1 × 1018 quantum degrees of freedom. This is the first treatment of photosystem II beyond the single-electron picture of density functional theory. Our calculations support recent modifications to the structure determined by X-ray crystallography. We further identify multiple low-lying energy surfaces associated with the structural distortion seen using X-ray crystallography, highlighting multistate reactivity in the chemistry of the cluster. Direct determination of Mn spin-projections from our wavefunctions suggests that current candidates that have been recently distinguished using parameterized spin models should be reassessed. Through entanglement maps, we reveal rich information contained in the wavefunctions on bonding changes in the cycle.

Kurashige, Yuki; Chan, Garnet Kin-Lic; Yanai, Takeshi

2013-08-01

239

-CaO Slags by Al in Fe-Al(-Si) Melts  

NASA Astrophysics Data System (ADS)

Kinetic models considering mass transport in, (i) metal phase only and (ii) both metal and slag phases (mixed control or two-phase mass transfer) were developed for the reduction of SiO2 in a SiO2-Al2O3-CaO slag by Al in an Al-Fe melt. The models were validated with experiments of the reaction with Fe-Al melt and SiO2-Al2O3-CaO-MgOsat slags at 1873 K (1600 °C). The models predict that the rate of reaction is slower in the mixed control model because of the added resistance of slag phase mass transport. The mixed control becomes applicable when the slag contains low amounts of SiO2. In this case, when the initial Al content in the metal increases, the normalized rate of reaction decreases. The increased Al content in the metal retards the reaction due to the limited SiO2 provided to the reaction interface in the mixed control model. Sensitivity analyses were done using the models for the ratios of mass transfer coefficients of Si to Al, and Al2O3 to Si, along with slag density, which did not impose a significant effect.

Park, Jiwon; Sridhar, Seetharaman; Fruehan, Richard J.

2014-08-01

240

Inhibitory Effects of Daiokanzoto (Da-Huang-Gan-Cao-Tang) on P-Glycoprotein  

PubMed Central

We have studied the effects of various Kampo medicines on P-glycoprotein (P-gp), a drug transporter, in vitro. The present study focused on Daiokanzoto (Da-Huang-Gan-Cao-Tang), which shows the most potent inhibitory effects on P-gp among the 50 Kampo medicines studied, and investigated the P-gp inhibitory effects of Daiokanzoto herbal ingredients (rhubarb and licorice root) and their components by an ATPase assay using human P-gp membrane. Both rhubarb and licorice root significantly inhibited ATPase activity, and the effects of rhubarb were more potent than those of licorice root. The content of rhubarb in Daiokanzoto is double that in licorice root, and the inhibition patterns of Daiokanzoto and rhubarb involve both competitive and noncompetitive inhibition, suggesting that the inhibitory effects of Daiokanzoto are mainly due to rhubarb. Concerning the components of rhubarb, concentration-dependent inhibitory effects were observed for (?)-catechin gallate, (?)-epicatechin gallate, and (?)-epigallocatechin gallate. In conclusion, rhubarb may cause changes in the drug dispositions of P-gp substrates through the inhibition of P-gp. It appears that attention should be given to the interactions between these drugs and Kampo medicines containing rhubarb as an herbal ingredient. PMID:22969825

Watanabe, Yuka; Ikarashi, Nobutomo; Satoh, Toshiyuki; Ito, Kiyomi; Ochiai, Wataru; Sugiyama, Kiyoshi

2012-01-01

241

First-principles simulations of CaO and CaSiO3 liquids: structure, thermodynamics and diffusion  

NASA Astrophysics Data System (ADS)

We have performed first-principles molecular dynamics simulations of CaO and CaSiO3 liquids over broad ranges of pressure (0-150 GPa) and temperature (2,500-8,000 K) within density-functional theory. The simulated liquid structure changes considerably on compression with the mean cation-anion coordination numbers increasing nearly linearly with volume. The Ca-O coordination number increases from 5 (7) near the ambient pressure to 8 (10) at high pressure for CaO (CaSiO3) liquid. The Si-O coordination number increases from 4 to 6 over the same pressure regime. Our results show that both liquids are much more compressible than their solid counterparts implying the possibility of liquid-solid density crossovers at high pressure. The Grüneisen parameter of both the liquids increases with pressure, which is opposite in case of crystalline phases. The calculated self-diffusion coefficients strongly depend on temperature and pressure, thereby requiring non-Arrhenian representation with variable activation volume. The diffusivity differences between the two liquids tend to be large at low-temperature and low-pressure regime. Also, comparisons with MgSiO3 liquid suggest that network modifier cations Ca and Mg behave similarly though Ca is more coordinated and more mobile as compared to Mg.

Bajgain, Suraj K.; Ghosh, Dipta B.; Karki, Bijaya B.

2015-01-01

242

Li/Mo codoping of CaO films: a means to tailor the equilibrium shape of Au deposits.  

PubMed

Using scanning tunneling microscopy, we have investigated how the doping of CaO thin films affects the growth behavior of gold. Whereas 3D deposits develop on pristine films, 2D islands form after inserting 4% of Mo into the CaO lattice. Adding small amounts of Li to the Mo-doped CaO reinstalls the initial 3D growth regime. We assign this morphology crossover to charge transfer processes between the dopants and the ad-metal. Whereas Mo acts as an electron donor and provides excess charges to be transferred into the gold, Li creates electron traps in the oxide lattice that interrupt the charge flow toward the metal. The different Au charge states in the presence of the dopants are derived from different growth morphologies with anionic gold favoring a 2D mode due to an enhanced interface adhesion. Our work demonstrates how oxide doping can be exploited to tailor the equilibrium geometry of ad-particles on supported metal catalysts. PMID:22280016

Shao, Xiang; Nilius, Niklas; Freund, Hans-Joachim

2012-02-01

243

Canopy spectral and chemical diversity from lowland to tree line in the Western Amazon using CAO-VSWIR  

NASA Astrophysics Data System (ADS)

Canopy chemistry and spectroscopy offer insight into community assembly and ecosystem processes in high-diversity tropical forests. Results from one lowland site in the Peruvian Amazon suggests both an environmental and an evolutionary component of canopy trait development however, the degree to which larger environmental differences influence diversity in canopy traits and their respective spectroscopic signatures across remains poorly understood. The spectranomics approach explicitly connects phylogenetic, chemical and spectral patterns in tropical canopies providing the basis for analysis, while high-fidelity, airborne remote sensing measurements extend plot-level data to landscape-scale, achieving a comprehensive view of the region. In 2011, the Carnegie Airborne Observatory (CAO) was used to sample a large region of the Western Amazon Basin in southeastern Peru, extending from lowlands to tree line in the Andean mountains. The CAO Visible-Shortwave Imaging Spectrometer (VSWIR) collected 480-band high-fidelity imaging spectroscopy data of the forest canopy, while its high-resolution LiDAR captured information on canopy structure and the underlying terrain. The data were used to quantify relationships between environmental gradients and canopy chemical and spectral diversity. Results suggest strong environmental control with additional phylogenetic influence over canopy spectral and chemical properties, particularly those related to structure, defense and metabolic function. Data from CAO-VSWIR extends the large range in canopy chemical and spectral diversity related to environmental factors across the Western Amazon Basin.

Martin, R. E.; Asner, G. P.

2012-12-01

244

Characterization of 12CaO x 7Al2O3 doped indium tin oxide films for transparent cathode in top-emission organic light-emitting diodes.  

PubMed

12CaO x 7Al2O3, insulator (C12A7) doped indium tin oxide (ITO) (ITO:C12A7) films were fabricated using a radio frequency magnetron co-sputtering system with ITO and C12A7 targets. The qualitative and quantitative properties of ITO:C12A7 films, as a function of C12A7 concentration, were examined via X-ray photoemission spectroscopy and synchrotron X-ray scattering as well as by conducting atomic force microscopy. The work function of ITO:C12A7 (1.3%) films of approximately 2.8 eV obtained by high resolution photoemission spectroscopy measurements make them a reasonable cathode for top-emission organic light-emitting diodes. PMID:24245291

Jung, Chul Ho; Hwang, In Rok; Park, Bae Ho; Yoon, Dae Ho

2013-11-01

245

Micelle-Assisted Synthesis of Al2O3·CaO Nanocatalyst: Optical Properties and Their Applications in Photodegradation of 2,4,6-Trinitrophenol  

PubMed Central

Calcium oxide (CaO) nanoparticles are known to exhibit unique property due to their high adsorption capacity and good catalytic activity. In this work the CaO nanocatalysts were prepared by hydrothermal method using anionic surfactant, sodium dodecyl sulphate (SDS), as a templating agent. The as-synthesized nanocatalysts were further used as substrate for the synthesis of alumina doped calcium oxide (Al2O3·CaO) nanocatalysts via deposition-precipitation method at the isoelectric point of CaO. The Al2O3·CaO nanocatalysts were characterized by FTIR, XRD, TGA, TEM, and FESEM techniques. The catalytic efficiencies of these nanocatalysts were studied for the photodegradation of 2,4,6-trinitrophenol (2,4,6-TNP), which is an industrial pollutant, spectrophotometrically. The effect of surfactant and temperature on size of nanocatalysts was also studied. The smallest particle size and highest percentage of degradation were observed at critical micelle concentration of the surfactant. The direct optical band gap of the Al2O3·CaO nanocatalyst was found as 3.3?eV. PMID:24311980

Imtiaz, Ayesha; Khaleeq-ur-rahman, Muhammad; Adnan, Rohana

2013-01-01

246

The Eclipsing Binary On-Line Atlas (EBOLA)  

NASA Astrophysics Data System (ADS)

In conjunction with the upcoming release of \\it Binary Maker 3.0, an extensive on-line database of eclipsing binaries is being made available. The purposes of the atlas are: \\begin {enumerate} Allow quick and easy access to information on published eclipsing binaries. Amass a consistent database of light and radial velocity curve solutions to aid in solving new systems. Provide invaluable querying capabilities on all of the parameters of the systems so that informative research can be quickly accomplished on a multitude of published results. Aid observers in establishing new observing programs based upon stars needing new light and/or radial velocity curves. Encourage workers to submit their published results so that others may have easy access to their work. Provide a vast but easily accessible storehouse of information on eclipsing binaries to accelerate the process of understanding analysis techniques and current work in the field. \\end {enumerate} The database will eventually consist of all published eclipsing binaries with light curve solutions. The following information and data will be supplied whenever available for each binary: original light curves in all bandpasses, original radial velocity observations, light curve parameters, RA and Dec, V-magnitudes, spectral types, color indices, periods, binary type, 3D representation of the system near quadrature, plots of the original light curves and synthetic models, plots of the radial velocity observations with theoretical models, and \\it Binary Maker 3.0 data files (parameter, light curve, radial velocity). The pertinent references for each star are also given with hyperlinks directly to the papers via the NASA Abstract website for downloading, if available. In addition the Atlas has extensive searching options so that workers can specifically search for binaries with specific characteristics. The website has more than 150 systems already uploaded. The URL for the site is http://ebola.eastern.edu/.

Bradstreet, D. H.; Steelman, D. P.; Sanders, S. J.; Hargis, J. R.

2004-05-01

247

Self-recognition in crickets via on-line processing.  

PubMed

Self-referent phenotype matching, the ability of animals to use aspects of their own phenotype as a referent in discrimination decisions, is believed to play a significant role in nepotistic interactions and mate choice in a wide range of taxa [1]. An individual's ability to assess the similarity between its own phenotype and that of the individuals it encounters can provide a reliable measure of relatedness, thereby facilitating inbreeding avoidance, optimal outbreeding or altruistic behavior towards kin [2,3]. Although self-referencing is believed to be widespread, definitive evidence is scarce and its role in recognition controversial, in part, because of the difficulty in ruling out early exposure to close kin and the possibility that individuals imprint on maternal cues early in their ontogeny, either during birth or via cues encountered upon hatching from eggs [1,4]. An equally important, yet unanswered question is whether individuals that perform self-referencing imprint on their own traits at an early stage, relying on this memorized template in subsequent interactions, or whether no memory is formed but individuals use their own phenotype directly in comparison with other individuals (i.e., 'on-line processing') [3]. Finally, animals may possess 'recognition alleles', in which both the phenotypic cues and the knowledge of the cues have a genetic basis [5]. Here we show in the decorated cricket, Gryllodes sigillatus, that female mate choice can be manipulated by experimentally altering a female's own olfactory cues. We found exclusive evidence both for the existence of a chemosensory self-referencing mechanism and that females do not rely on an innate or early learned template but rather directly use their own phenotypic cues in comparison. PMID:25465327

Capodeanu-Nägler, Alexandra; Rapkin, James; Sakaluk, Scott K; Hunt, John; Steiger, Sandra

2014-12-01

248

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

249

Treatability of PCB-contaminated soils with quicklime (CaO)  

SciTech Connect

The possibility that quicklime (calcium oxide, CaO) can destroy PCBs has received much attention over the past year. Observations at an EPA remediation site, where lime-containing kiln dusts were used for interim stabilization of PCB-containing wastes prompted the EPA to sponsor a small research project to investigate quicklime-PCB interactions. That study reported decreases in PCB content in synthetic, PCB-spiked soil following the application of quicklime and heat. META Environmental, Inc., as a contractor to EPRI, recently completed research designed to evaluate the effectiveness of quicklime for treating PCBs in soil and sand matrices under several reaction conditions, and to examine the underlying dechlorination chemistry involved, if any. Experiments were run with PCB-spiked sand and with actual PCB-contaminated soil. A variety of experimental conditions were employed including tests in open and closed containers, at ambient and elevated temperatures, and over a range of one hour to four days. Granular quicklime, fly ash, and kiln dust were all tested for reaction with PCBs. Early experiments showed that a mixture of sand/quicklime/water at 1:3:1.5 by weight, placed in an insulated container reached a maximum temperature of 216[degree]C. Treatability experiments were subsequently run under controlled heat at room temperature, at 80[degree]C, and at 200[degree]C (following the initial temperature increase which occurs when water is added to quicklime). Little or no loss of PCBs was observed in open or closed containers at ambient or at 800[degree]C over any period of time studied. A significant decrease of PCBs levels was observed only in the high temperature experiments (above 200[degree]C), however the fate of the PCBs in those experiments was not determined. The conditions and the results of the PCB treatment tests are presented in this report, as well as recommendations for further studies.

Mauro, D.; Taylor, B.B. (Meta Environmental, Inc., Watertown, MA (United States))

1992-12-01

250

Chemical compositions of impact melt breccias and target rocks from the Tenoumer impact crater, Mauritania  

Microsoft Academic Search

The impact melt breccias from the Tenoumer crater (consisting of a fine-grained intergrowth of plagioclase laths, pyroxene crystals, oxides, and glass) display a wide range of porosity and contain a large amount of target rock clasts.Analyses of major elements in impact melt rocks show lower contents of SiO2, Al2O3, and Na2O, and higher contents of MgO, Fe2O3, and CaO, than

Giovanni Pratesi; Marco Morelli; Angelo Pio Rossi; Gian Gabriele Ori

2005-01-01

251

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

252

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

253

Resonance ionization laser ion sources for on-line isotope separators (invited)  

SciTech Connect

A Resonance Ionization Laser Ion Source (RILIS) is today considered an essential component of the majority of Isotope Separator On Line (ISOL) facilities; there are seven laser ion sources currently operational at ISOL facilities worldwide and several more are under development. The ionization mechanism is a highly element selective multi-step resonance photo-absorption process that requires a specifically tailored laser configuration for each chemical element. For some isotopes, isomer selective ionization may even be achieved by exploiting the differences in hyperfine structures of an atomic transition for different nuclear spin states. For many radioactive ion beam experiments, laser resonance ionization is the only means of achieving an acceptable level of beam purity without compromising isotope yield. Furthermore, by performing element selection at the location of the ion source, the propagation of unwanted radioactivity downstream of the target assembly is reduced. Whilst advances in laser technology have improved the performance and reliability of laser ion sources and broadened the range of suitable commercially available laser systems, many recent developments have focused rather on the laser/atom interaction region in the quest for increased selectivity and/or improved spectral resolution. Much of the progress in this area has been achieved by decoupling the laser ionization from competing ionization processes through the use of a laser/atom interaction region that is physically separated from the target chamber. A new application of gas catcher laser ion source technology promises to expand the capabilities of projectile fragmentation facilities through the conversion of otherwise discarded reaction fragments into high-purity low-energy ion beams. A summary of recent RILIS developments and the current status of laser ion sources worldwide is presented.

Marsh, B. A. [EN Department, CERN, 1211 Geneva (Switzerland)] [EN Department, CERN, 1211 Geneva (Switzerland)

2014-02-15

254

Asymmetrical flow field-flow fractionation with on-line detection for drug transfer studies: a feasibility study.  

PubMed

Knowledge about drug retention within colloidal carriers is of uppermost importance particularly if drug targeting is anticipated. The aim of the present study was to evaluate asymmetrical flow field-flow fractionation (AF4) with on-line UV/VIS drug quantification for its suitability to determine both release and transfer of drug from liposomal carriers to a model acceptor phase consisting of large liposomes. The hydrophobic porphyrin 5,10,15,20-tetrakis(4-hydroxyphenyl)21H,23H-porphine (p-THPP), a fluorescent dye with an absorbance maximum in the visible range and structural similarity to the clinically used photosensitizer temoporfin, was used as a model drug, and two types of large liposomes were studied as a potential model acceptor phase. Efficiency of separation of small donor from large acceptor liposomes by AF4 was evaluated in dependence on the injected lipid mass using two different channel geometries. Drug quantification by on-line absorbance measurements was established by comprehensive evaluation of the size-dependent turbidity contribution in on-line UV/VIS detection and by comparison with off-line results obtained for the respective dye-loaded donor formulations (dissolved in methanol). Due to distinct differences in size, the acceptor liposomes (mean diameters ?300-400 nm) could efficiently be separated from the donor liposomes (mean diameter ?70 nm) with less than 4 % of p-THPP detected in the overlap region between both vesicle populations. Whereas p-THPP could accurately be determined in the fraction of small vesicles, on-line quantification was impaired in the fraction of the large acceptor liposomes due to the pronounced contribution of turbidity (about 80 % of total UV/VIS extinction signal). The AF4-based release/transfer approach suggested here was found repeatable and robust. The employed combination of AF4 with multi-angle laser light scattering furthermore provided detailed size information of the eluting sample and thus allowed to detect instabilities and/or interactions between the donor and acceptor liposomes. Drug quantification by on-line absorbance measurements was found feasible for the chosen model drug, but careful (re-)evaluation of turbidity effects is crucial for other drug and carrier combinations. PMID:24518901

Hinna, Askell; Steiniger, Frank; Hupfeld, Stefan; Brandl, Martin; Kuntsche, Judith

2014-12-01

255

BUILDING ROBUST APPEARANCE MODELS USING ON-LINE FEATURE SELECTION  

SciTech Connect

In many tracking applications, adapting the target appearance model over time can improve performance. This approach is most popular in high frame rate video applications where latent variables, related to the objects appearance (e.g., orientation and pose), vary slowly from one frame to the next. In these cases the appearance model and the tracking system are tightly integrated, and latent variables are often included as part of the tracking system's dynamic model. In this paper we describe our efforts to track cars in low frame rate data (1 frame/second) acquired from a highly unstable airborne platform. Due to the low frame rate, and poor image quality, the appearance of a particular vehicle varies greatly from one frame to the next. This leads us to a different problem: how can we build the best appearance model from all instances of a vehicle we have seen so far. The best appearance model should maximize the future performance of the tracking system, and maximize the chances of reacquiring the vehicle once it leaves the field of view. We propose an online feature selection approach to this problem and investigate the performance and computational trade-offs with a real-world dataset.

PORTER, REID B. [Los Alamos National Laboratory; LOVELAND, ROHAN [Los Alamos National Laboratory; ROSTEN, ED [Los Alamos National Laboratory

2007-01-29

256

Steam-Coal Gasification Using CaO and KOH for in Situ Carbon and Sulfur Capture  

SciTech Connect

We present experimental results of coal gasification with and without the addition of calcium oxide and potassium hydroxide as dual-functioning catalyst–capture agents. Using two different coal types and temperatures between 700 and 900 °C, we studied the effect of these catalyst–capture agents on (1) the syngas composition, (2) CO{sub 2} and H{sub 2}S capture, and (3) the steam–coal gasification kinetic rate. The syngas composition from the gasifier was roughly 20% methane, 70% hydrogen, and 10% other species when a CaO/C molar ratio of 0.5 was added. We demonstrated significantly enhanced steam–coal gasification kinetic rates when adding small amounts of potassium hydroxide to coal when operating a CaO–CaCO{sub 3} chemical looping gasification reactor. For example, the steam–coal gasification kinetic rate increased 250% when dry mixing calcium oxide at a Ca/C molar ratio of 0.5 with a sub-bituminous coal, and the kinetic rate increased 1000% when aqueously mixing calcium oxide at a Ca/C molar ratio of 0.5 along with potassium hydroxide at a K/C molar ratio of 0.06. In addition, we conducted multi-cycle studies in which CaCO{sub 3} was calcined by heating to 900 °C to regenerate the CaO, which was then reused in repeated CaO–CaCO{sub 3} cycles. The increased steam–coal gasification kinetics rates for both CaO and CaO + KOH persisted even when the material was reused in six cycles of gasification and calcination. The ability of CaO to capture carbon dioxide decreased roughly 2–4% per CaO–CaCO{sub 3} cycle. We also discuss an important application of this combined gasifier–calciner to electricity generation and selling the purge stream as a precalcined feedstock to a cement kiln. In this scenario, the amount of purge stream required is fixed not by the degradation in the capture ability but rather by the requirements at the cement kiln on the amount of CaSO{sub 4} and ash in the precalcined feedstock.

Siefert, Nicholas S.; Shekhawat, Dushyant; Litster, Shawn; Berry, David, A

2013-08-01

257

Kinetics of wetting for MgO, CaO, and BeO by Pd, Pt, and Rh melts  

NASA Astrophysics Data System (ADS)

The wetting of magnesium, calcium, and beryllium oxides (MgO, CaO, and BeO) is considered, depending on the ratios of the surface tensions of the oxides to the melts at inequality ?sg/?lg < 1 characteristic of metallophobic solid surfaces. It is shown that the changes in the wetting angle with temperature during isothermal exposure are determined by the ratio of the surface tensions of the phases ?MgO/?Me. It is found that the wetting angle moves down or up when the ratios of the surface tensions increase or decrease, respectively, depending on the values of ?sg and ?lg.

Timofeev, A. I.; Chentsov, V. P.

2015-01-01

258

Fixed-target physics at Fermilab  

SciTech Connect

The Fermilab Energy Saver is now successfully commissioned and fixed-target experimentation at high energy (800 GeV) has begun. In addition, a number of new experiments designed to exploit the unique features of the Tevatron are yet to come on-line. In this talk, we will review recent accomplishments in the fixed-target program and describe experiments in progress and others yet to come.

Bjorken, J.D.

1985-03-01

259

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

260

On-line remote prediction of gasoline properties by combined optical methods  

Microsoft Academic Search

On-line prediction of 10 gasoline properties, such as research and motor octane numbers, vapor pressure, API gravity, aromatic contents, etc., are carried out on-line by a remotely operated detector coupled to the main control unit by communication optical fibers. This information is of considerable importance since it is needed for process monitoring and for the preparation of final petrochemical products

Iris Litani-Barzilai; Ilan Sela; Valery Bulatov; Irena Zilberman; Israel Schechter

1997-01-01

261

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

262

Teachers' Perceptions of the On-Line Rater Training and Monitoring.  

ERIC Educational Resources Information Center

Describes a pilot on-line system of rater training developed at Hong Kong Polytechnic University to support the English Language Centre's English for academic purposes and English in the workplace subjects. Presents findings from a project that investigated raters' attitudes towards assessment and rater training, and evaluated the pilot on-line…

Hamilton, Jan; Reddel, Sue; Spratt, Mary

2001-01-01

263

BROWSER: An Automatic Indexing On-Line Text Retrieval System. Annual Progress Report.  

ERIC Educational Resources Information Center

The development and testing of the Browsing On-line With Selective Retrieval (BROWSER) text retrieval system allowing a natural language query statement and providing on-line browsing capabilities through an IBM 2260 display terminal is described. The prototype system contains data bases of 25,000 German language patent abstracts, 9,000 English…

Williams, J. H., Jr.

264

Enhancing On-Line Teaching with Verbal Immediacy through Self-Determination Theory  

ERIC Educational Resources Information Center

This paper explores the use of instructor verbal immediacy behaviors for on-line classes. Specifically, it demonstrates how instructor verbal immediacy behaviors found in face-to-face classes can also be displayed for on-line classes. It is argued that self-determination theory describes identification of the student as an important role in the…

Furlich, Stephen A.

2013-01-01

265

Integration of On-Line Protein Digestion, Peptide Separation, and Protein Identification Using  

E-print Network

Integration of On-Line Protein Digestion, Peptide Separation, and Protein Identification Using promotes penetra- tion of large molecular proteins into the column. The immobilized pepsin-digested electrophoresis column to a mass spectrometer. The on-line digestion of insulin chain and lysozyme provides

Zare, Richard N.

266

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

Code of Federal Regulations, 2010 CFR

...Characteristic (OC) curves for on-line sampling and inspection. 42.140 Section...Characteristic (OC) curves for on-line sampling and inspection. (a) This section...Characteristic (OC) curve for each of the sampling plans given in Tables I, I-A,...

2010-01-01

267

An "Infobutton" for Enabling Patients to Interpret On-line Pap Smear Reports  

E-print Network

An "Infobutton" for Enabling Patients to Interpret On-line Pap Smear Reports David M. Baorto, MD background to understand their Pap smear reports. This information button, or "infobutton", is attached to on-line text reports describing Pap smear results present in a medical record system intended for patient

Cimino, James J.

268

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

269

Targeting adenovirus  

Microsoft Academic Search

The use of targeted viral vectors to localize gene transfer to specific cell types holds many advantages over conventional, non-targeted vectors currently used in gene therapy. The resulting improvements in gene localization from targeted adenovirus vectors are likely to reduce immunogenicity and toxicity, increase safety, and enable the systemic administration of these vectors for multiple indications including cancer, cardiovascular disease,

T J Wickham

2000-01-01

270

Intelligent identification of wear mechanism via on-line ferrograph images  

NASA Astrophysics Data System (ADS)

Condition based maintenance(CBM) issues a new challenge of real-time monitoring for machine health maintenance. Wear state monitoring becomes the bottle-neck of CBM due to the lack of on-line information acquiring means. The wear mechanism judgment with characteristic wear debris has been widely adopted in off-line wear analysis; however, on-line wear mechanism characterization remains a big problem. In this paper, the wear mechanism identification via on-line ferrograph images is studied. To obtain isolated wear debris in an on-line ferrograph image, the deposition mechanism of wear debris in on-line ferrograph sensor is studied. The study result shows wear debris chain is the main morphology due to local magnetic field around the deposited wear debris. Accordingly, an improved sampling route for on-line wear debris deposition is designed with focus on the self-adjustment deposition time. As a result, isolated wear debris can be obtained in an on-line image, which facilitates the feature extraction of characteristic wear debris. By referring to the knowledge of analytical ferrograph, four dimensionless morphological features, including equivalent dimension, length-width ratio, shape factor, and contour fractal dimension of characteristic wear debris are extracted for distinguishing four typical wear mechanisms including normal, cutting, fatigue, and severe sliding wear. Furthermore, a feed-forward neural network is adopted to construct an automatic wear mechanism identification model. By training with the samples from analytical ferrograph, the model might identify some typical characteristic wear debris in an on-line ferrograph image. This paper performs a meaningful exploratory for on-line wear mechanism analysis, and the obtained results will provide a feasible way for on-line wear state monitoring.

Wu, Tonghai; Peng, Yeping; Sheng, Chenxing; Wu, Jiaoyi

2014-03-01

271

Evolution of the electronic structure of CaO thin films following Mo interdiffusion at high temperature  

NASA Astrophysics Data System (ADS)

The electronic structure of CaO films of 10-60 monolayer thickness grown on Mo(001) has been investigated with synchrotron-mediated x-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). Upon annealing or reducing the thickness of the film, a rigid shift of the CaO bands to lower energy is revealed. This evolution is explained with a temperature-induced diffusion of Mo ions from the metal substrate to the oxide and their accumulation in the interface region of the film. The Mo substitutes divalent Ca species in the rocksalt lattice and is able to release electrons to the system. The subsequent changes in the Mo oxidation state have been followed with high-resolution XPS measurements. While near-interface Mo transfers extra electrons back to the substrate, generating an interface dipole that gives rise to the observed band shift, near-surface species are able to exchange electrons with adsorbates bound to the oxide surface. For example, exposure of O2 results in the formation of superoxo species on the oxide surface, as revealed from STM measurements. Mo interdiffusion is therefore responsible for the pronounced donor character of the initially inert oxide, and largely modifies its adsorption and reactivity behavior.

Cui, Yi; Pan, Yi; Pascua, Leandro; Qiu, Hengshan; Stiehler, Christian; Kuhlenbeck, Helmut; Nilius, Niklas; Freund, Hans-Joachim

2015-01-01

272

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

273

Liquidus Temperatures in the ``Cu2O''-FeO-Fe2O3-CaO System at Molten Metallic Copper Saturation  

NASA Astrophysics Data System (ADS)

Calcium ferrite slags, used in continuous copper-converting processes, can be described by the “Cu2O”-FeO-Fe2O3-CaO system at copper metal saturation. Equilibration/quenching/electron probe X-ray microanalysis (EPMA) techniques with primary phase substrate support have been used to experimentally determine liquidus and solidus data for this system for the primary phase fields of cuprite, dicalcium ferrite, and spinel from 1100 °C to 1250 °C. The resulting measurements are presented as liquidus and solidus isotherms in the “Cu2O”-“Fe2O3”-CaO system in equilibrium with metallic copper.

Nikolic, Stanko; Hayes, Peter C.; Jak, Evgueni

2009-12-01

274

Effect of CaO and SiO2 additives on magnetic properties of SrZn2-W type hexagonal ferrite  

Microsoft Academic Search

An experiment was carried out to investigate the effect of CaO and SiO2 additives on the magnetic and physical properties of Sr-Zn W-type hexagonal ferrite. The specimens were prepared by the conventional manufacturing method without atmosphere control. It was found that the magnetic properties of SrO·2ZnO·8Fe2 O3 are considerably improved on adding 1 wt% CaO and SiO2 together. The optimum

H. Yamamoto; T. Mitsuoka

1994-01-01

275

Dimensional description of on-line wear debris images for wear characterization  

NASA Astrophysics Data System (ADS)

As one of the most wear monitoring indicator, dimensional feature of individual particles has been studied mostly focusing on off-line analytical ferrograph. Recent development in on-line wear monitoring with wear debris images shows that merely wear debris concentration has been extracted from on-line ferrograph images. It remains a bottleneck of obtaining the dimension of on-line particles due to the low resolution, high contamination and particle's chain pattern of an on-line image sample. In this work, statistical dimension of wear debris in on-line ferrograph images is investigated. A two-step procedure is proposed as follows. First, an on-line ferrograph image is decomposed into four component images with different frequencies. By doing this, the size of each component image is reduced by one fourth, which will increase the efficiency of subsequent processing. The low-frequency image is used for extracting the area of wear debris, and the high-frequency image is adopted for extracting contour. Second, a statistical equivalent circle dimension is constructed by equaling the overall wear debris in the image into equivalent circles referring to the extracted total area and premeter of overall wear debris. The equivalent circle dimension, reflecting the statistical dimension of larger wear debris in an on-line image, is verified by manual measurement. Consequently, two preliminary applications are carried out in gasoline engine bench tests of durability and running-in. Evidently, the equivalent circle dimension, together with the previously developed concentration index, index of particle coverage area (IPCA), show good performances in characterizing engine wear conditions. The proposed dimensional indicator provides a new statistical feature of on-line wear particles for on-line wear monitoring. The new dimensional feature conveys profound information about wear severity.

Wu, Tonghai; Peng, Yeping; Du, Ying; Wang, Junqun

2014-11-01

276

Dimensional description of on-line wear debris images for wear characterization  

NASA Astrophysics Data System (ADS)

As one of the most wear monitoring indicator, dimensional feature of individual particles has been studied mostly focusing on off-line analytical ferrograph. Recent development in on-line wear monitoring with wear debris images shows that merely wear debris concentration has been extracted from on-line ferrograph images. It remains a bottleneck of obtaining the dimension of on-line particles due to the low resolution, high contamination and particle's chain pattern of an on-line image sample. In this work, statistical dimension of wear debris in on-line ferrograph images is investigated. A two-step procedure is proposed as follows. First, an on-line ferrograph image is decomposed into four component images with different frequencies. By doing this, the size of each component image is reduced by one fourth, which will increase the efficiency of subsequent processing. The low-frequency image is used for extracting the area of wear debris, and the high-frequency image is adopted for extracting contour. Second, a statistical equivalent circle dimension is constructed by equaling the overall wear debris in the image into equivalent circles referring to the extracted total area and premeter of overall wear debris. The equivalent circle dimension, reflecting the statistical dimension of larger wear debris in an on-line image, is verified by manual measurement. Consequently, two preliminary applications are carried out in gasoline engine bench tests of durability and running-in. Evidently, the equivalent circle dimension, together with the previously developed concentration index, index of particle coverage area (IPCA), show good performances in characterizing engine wear conditions. The proposed dimensional indicator provides a new statistical feature of on-line wear particles for on-line wear monitoring. The new dimensional feature conveys profound information about wear severity.

Wu, Tonghai; Peng, Yeping; Du, Ying; Wang, Junqun

2014-09-01

277

Bunched release of gases from oxide targets  

NASA Astrophysics Data System (ADS)

Targets made out of oxides of the alkaline earth metals have been shown at ISOLDE to be among the fastest targets for production of radioactive beams of the rare gas elements. In addition oxide target materials release nitrogen and seem to be the only ones which may release the element carbon due to its oxidation to the high temperature stable CO gas. Thick targets of MgO and CaO have been studied in connection with their use at the 1 GeV pulsed proton beam from the PS-BOOSTER synchrotron. It is shown that the 2.4 ?s short proton pulse causes a pronounced bunched release with short delay of these elements which gives rise to 100-200 ms wide pulses of radioactive ion beams. Pulse shapes and overall yields of ion beams of He, Ne and Ar isotopes are studied as function of temperature and proton pulse intensity. For carbon and nitrogen also the release as function of the observed ionic species C+, CO+, N+ and N2+ is discussed.

Ravn, H. L.; Catherall, R.; Evensen, A. H. M.; Jonsson, O. C.; Kugler, E.; Lettry, J.; Tengblad, O.; Barker, J.; Drumm, P.; Hagebø, E.; Hoff, P.; Steffensen, K.

1996-04-01

278

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

NASA Astrophysics Data System (ADS)

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), spectral (with XSPEC) and timing data analysis (with LCURVE) can be performed. At the same time, spectra, light curves, effective area, exposure map and response matrix are promptly available for download to the user for any off-line analysis.

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

2010-10-01

279

On-line drug metabolites generation and their subsequent target analysis by capillary zone electrophoresis with UV-absorption detection.  

PubMed

This study presents the in-capillary enzymatic biotransformation of dextromethorphan, an antitusive drug and opioid receptor antagonist, and subsequent electrophoretic separation of its products. The study includes the optimization of separation parameters to fulfill the requirements of an online microreaction. The analyses were performed in a bare fused-silica capillary using 100 mM sodium tetraborate (pH 10.0) mixed with linear polyacrylamide (20%, v/v) and 2-propanol (10%, v/v). This BGE was suitable for monitoring both off-line and in-capillary incubations. The partial filling technique enabled the enzymatic reaction to be carried out in its optimal environment (20 mM sodium phosphate, pH 7.4). Finally, in-capillary microreaction in the presence of cytochrome P450 3A4 gave satisfactory outcomes. PMID:22216440

Zeisbergerová, Marta; ?emínek, Roman; Mádr, Aleš; Glatz, Zden?k; Hoogmartens, Jos; Van Schepdael, Ann

2010-10-01

280

On-line sample preconcentration in capillary electrophoresis. Fundamentals and applications.  

PubMed

On-line preconcentration is one of the aspects of analytical method development using capillary electrophoretic techniques. The choice of the sample matrix alone can significantly alter both method sensitivity and separation efficiency. The recent trend to detect samples in narrower separation vessels also necessitates the need to improve detection sensitivity. The desire to detect very low levels of analytes using limited amounts of sample from biological specimens and the high separation efficiency obtainable using very large injections compared to classical small size injections also adds to this list. Indeed, one of the rich areas of research in the capillary electrophoresis field is on on-line sample preconcentration. More than 400 published research articles gathered from the http://www.webofscience.com from the year 2000 described a form of on-line preconcentration in capillary electrophoresis. This review provides a comprehensive table listing the applications of on-line preconcentration in capillary electrophoresis. PMID:18035364

Simpson, Steven L; Quirino, Joselito P; Terabe, Shigeru

2008-03-14

281

On-line Hydraulic State Estimation in Urban Water Networks Using Reduced Models  

E-print Network

A Predictor-Corrector (PC) approach for on-line forecasting of water usage in an urban water system is presented and demonstrated. The M5 Model-Trees algorithm is used to predict water demands and Genetic Algorithms (GAs) ...

Preis, Ami

282

Context-dependent substroke model for HMM-based on-line handwriting recognition  

Microsoft Academic Search

Describes context-dependent substroke hidden Markov models (HMMs)for on-line handwritten recognition of cursive Kanji and Hiragana characters. In order to tackle this problem, we have proposed the substroke HMM approach where a modeling unit \\

Junko TOKUNO; Nobuhito INAMI; Shigeki MATSUDA; Mitsuru NAKAI; Hiroshi SHIMODAIRA; Shigeki SAGAYAMA

2002-01-01

283

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

284

Integration of On-Line and Off-Line Diagnostic Algorithms for Aircraft Engine Health Management  

NASA Technical Reports Server (NTRS)

This paper investigates the integration of on-line and off-line diagnostic algorithms for aircraft gas turbine engines. The on-line diagnostic algorithm is designed for in-flight fault detection. It continuously monitors engine outputs for anomalous signatures induced by faults. The off-line diagnostic algorithm is designed to track engine health degradation over the lifetime of an engine. It estimates engine health degradation periodically over the course of the engine s life. The estimate generated by the off-line algorithm is used to update the on-line algorithm. Through this integration, the on-line algorithm becomes aware of engine health degradation, and its effectiveness to detect faults can be maintained while the engine continues to degrade. The benefit of this integration is investigated in a simulation environment using a nonlinear engine model.

Kobayashi, Takahisa; Simon, Donald L.

2007-01-01

285

Using a strengths model to build an on-line nursing education program.  

PubMed

The on-line environment is the new frontier for academia struggling to define its place in the evolving economy. A concern is how to engage students who maximize their on-line experience and graduate in a timely manner. A strengths model was used as the basis for development of an on-line doctoral nursing program. Upon entering the program, students were given a strengths assessment that focused both students and faculty on the positive attributes students were bringing to their doctoral studies. A positive feedback methodology using on-line discussions in each course was used to support the identified strengths. The optimal picture of a successful entering doctoral student appears to be a person whose top five strengths are learner, achiever, input, connectedness and responsibility. A strengths model promotes a positive learning environment and supports a teacher-learner dynamic where faculty members are encouraged to focus on the students' strengths rather than their challenges. PMID:24939333

Wieck, K Lynn; Alfred, Danita; Haas, Barbara K; Yarbrough, Susan

2014-01-01

286

ON-LINE TOOLS FOR PROPER VERTICAL POSITIONING OF VERTICAL SAMPLING INTERVALS DURING SITE ASSESSMENT  

EPA Science Inventory

This presentation presents on-line tools for proper vertical positioning of vertical sampling intervals during site assessment. Proper vertical sample interval selection is critical for generate data on the vertical distribution of contamination. Without vertical delineation, th...

287

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

288

MODELS OF ON-LINE SOCIAL NETWORKS ANTHONY BONATO, NOOR HADI, PAUL HORN, PAWEL PRALAT,  

E-print Network

MODELS OF ON-LINE SOCIAL NETWORKS ANTHONY BONATO, NOOR HADI, PAUL HORN, PAWEL PRALAT, AND CHANGPING BONATO, NOOR HADI, PAUL HORN, PAWEL PRALAT, AND CHANGPING WANG posits low average distance (or diameter

Wang, Changping

289

Target discovery  

Microsoft Academic Search

Target discovery, which involves the identification and early validation of disease-modifying targets, is an essential first step in the drug discovery pipeline. Indeed, the drive to determine protein function has been stimulated, both in industry and academia, by the completion of the human genome project. In this article, we critically examine the strategies and methodologies used for both the identification

Mark A. Lindsay

2003-01-01

290

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

291

A new reduced parts on-line single-phase UPS system  

Microsoft Academic Search

This paper presents design considerations and performance analysis of a new reduced parts on-line single-phase uninterruptible power supply (UPS) system. The proposed new UPS system is based on the half-bridge topology. It employs only five IGBTs and one diode reducing the cost of the system compared to the conventional on-line UPS topology, while achieving excellent performance. The common neutral eliminates

S. B. Bekiarov; A. Nasiri; A. Emadi

2003-01-01

292

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

293

A decision-theoretic generalization of on-line learning and an application to boosting  

Microsoft Academic Search

In the first part of the paper we consider the problem of dynamically apportioning resources among a set of options in a worst-case on-line framework. The model we study can be interpreted as a broad, abstract extension of the well-studied on-line prediction model to a general decision-theoretic setting. We show that the multiplicative weight- update LittlestoneWarmuth rule can be adapted

Yoav Freund; Robert E. Schapire

1995-01-01

294

On-Line Algorithms, Real Time, the Virtue of Laziness, and the Power of Clairvoyance  

Microsoft Academic Search

\\u000a In several practical circumstances we have to solve a problem whose instance is not a priori completely known. Situations\\u000a of this kind occur in computer systems and networks management, in financial decision making, in robotics etc. Problems that\\u000a have to be solved without a complete knowledge of the instance are called on???line\\u000a problems. The analysis of properties of on-line problems

Giorgio Ausiello; Luca Allulli; Vincenzo Bonifaci; Luigi Laura

2006-01-01

295

On-line measurement of surface roughness by laser light scattering  

Microsoft Academic Search

On-line roughness measurement of a surface with one-dimensional manufacturing marks is difficult to implement. For example, a contact stylus-type inspection method often does not perform very well or fails without any prior knowledge of the mark distribution on the surface. In this paper, we propose an on-line surface roughness measurement method based on laser light scattering, which is very effective

Rong-Sheng Lu; Gui Yun Tian

2006-01-01

296

On-line optical flow feedback for mobile robot localization/navigation  

E-print Network

ON-LINE OPTICAL FLOW FEEDBACK FOR MOBILE ROBOT LOCALIZATION/NAVIGATION A Thesis by DAVID KRISTIN SORENSEN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 2003 Major Subject: Mechanical Engineering ON-LINE OPTICAL FLOW FEEDBACK FOR MOBILE ROBOT LOCALIZATION/NAVIGATION A Thesis by DAVID KRISTIN SORENSEN Submitted to Texas A&M University in partial fulfillment...

Sorensen, David Kristin

2004-09-30

297

Dynamic battery remaining useful life estimation: An on-line data-driven approach  

Microsoft Academic Search

Performance degradation and remaining useful life (RUL) estimation for lithium-ion battery has broad and practical applications in almost all industrial fields. The model-based prognostics is so complicated, moreover, they are not suitable for on-line application since that more parameters and modeling information should be obtained in advance. An on-line data-driven battery RUL prediction approach based on Online Support Vector Regression

Jianbao Zhou; Datong Liu; Yu Peng; Xiyuan Peng

2012-01-01

298

NOVA On-Line CMP Metrology and Its Use for Lot-to-Lot Process Control  

E-print Network

NOVA On-Line CMP Metrology and Its Use for Lot-to-Lot Process Control Taber H. Smith, Duane S;Goals of the NOVA/CMP Project Assess the Quality of the NOVA On-Line Metrology Tool ­ Gauge StudyDieThickness(Angs.) Lot # NOVA Post-Polish Thickness (Patterned Wafers) Region 3 Region 2 Region 1 SiteThickness Lot

Boning, Duane S.

299

LIVE TRACKING OF MUSICAL PERFORMANCES USING ON-LINE TIME WARPING  

Microsoft Academic Search

Dynamic time warping finds the optimal alignment of two time series, but it is not suitable for on-line applications because it re- quires complete knowledge of both series before the alignment can be computed. Further, the quadratic time and space requirements are limiting factors even for off-line systems. We present a novel on-line time warping algorithm which has linear time

Simon Dixon

2005-01-01

300

The design of circuit in on-line monitoring system for traction transformer insulation  

Microsoft Academic Search

In order to ensure the safety and stabilization of high-speed railway, it is very important to implement on-line monitoring system on traction transformer. The data acquisition, the main control circuit, the program of single chip Micyoco (SCM) and communication protocol, which are the components of the on-line monitoring system of traction transformer insulation, are roundly presented in this paper. This

Hao Tang; Jianbin Fan; Guangning Wu; Jinzhong Li

2008-01-01

301

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

302

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

2010-05-01

303

The determination of glycyrrhizic acid in Glycyrrhiza uralensis Fisch. ex DC. (Zhi Gan Cao) root and the dried aqueous extract by LC–DAD  

Microsoft Academic Search

A rapid, sensitive and specific reversed phase high-performance liquid chromatographic (LC) method with photodiode array detection (DAD) has been developed for the determination of glycyrrhizic acid in both the raw herb and a commercially prepared dried aqueous extract of Glycyrrhiza uralensis Fisch. ex DC. root (Zhi Gan Cao, liquorice). It was determined that extracting the raw herb in aqueous methanol

J. R. Hennell; S. Lee; C. S. Khoo; M. J. Gray; A. Bensoussan

2008-01-01

304

A picosecond electron gun for surface analysis M. Aeschlimann,a) E. Hull, J. Cao,b) C. A. Schmuttenmaer, L. G. Jahn,@ Y. Gao,b)  

E-print Network

A picosecond electron gun for surface analysis M. Aeschlimann,a) E. Hull, J. Cao,b) C. A investigations for a new design of an ultrashort pulsed laser activated electron gun for time resolved surface gun, in spite of an unusually long focal length and a small convergence angle of the pulsed electron

Cao, Jianming

305

Use of CaO as an activator for producing a price-competitive non-cement structural binder using ground granulated blast furnace slag  

SciTech Connect

The use of calcium oxide (CaO) demonstrates a superior potential for the activation of ground granulated blast furnace slag (GGBFS), and it produces a higher mechanical strength than calcium hydroxide [Ca(OH){sub 2}]. The mechanical strength differences between CaO- and Ca(OH){sub 2}-activated GGBFS binders are explored using isothermal calorimetry, powder X-ray diffraction, thermogravimetric and differential thermal analysis (TGA and DTA) as well as compressive strength testing. Calcium silicate hydrate (C–S–H), Ca(OH){sub 2} and a hydrotalcite-like phase are found as reaction products in all samples. The TGA and DTA results indicate that the use of CaO produces more C–S–H, although this is not likely to be the primary cause of higher strength development in the CaO-activated GGBFS. Rather, other factors such as porosity may govern the strength at a higher order of magnitude. Significant reduction of Ca(OH){sub 2} occurs only with the use of Ca(OH){sub 2}, followed by the formation of carbonate (CaCO{sub 3}), indicating carbonation. -- Highlights: •CaO showed a better potential for the activation of GGBFS than Ca(OH){sub 2}. •Strength test, XRD, TGA/DTA and isothermal calorimetry are used. •C-S-H, Ca(OH){sub 2}, and a hydrotalcite-like phase are found in all samples. •The use of Ca(OH){sub 2} causes some degree of carbonation.

Kim, Min Sik; Jun, Yubin; Lee, Changha, E-mail: clee@unist.ac.kr; Oh, Jae Eun, E-mail: ohjaeeun@unist.ac.kr

2013-12-15

306

Structure of polydisperse electrorheological fluids: Experiment M. Shen, J.G. Cao, H.T. Xue, J.P. Huang *, L.W. Zhou  

E-print Network

, such as electrorheological (ER) fluids, fer- rofluids, magnetorheological fluids, and electro-magneto- rheological fluidsStructure of polydisperse electrorheological fluids: Experiment and theory M. Shen, J.G. Cao, H (ER) fluids are often determined by the spatial arrangement of the suspended particles. We investigate

Huang, Ji-Ping

307

A Cost-Effective LSH Filter for Fast Pairwise Mining Gang Zhao, Yun Xiong, Longbing Cao, Dan Luo, Xuchun Su and Yangyong Zhu  

E-print Network

A Cost-Effective LSH Filter for Fast Pairwise Mining Gang Zhao, Yun Xiong, Longbing Cao, Dan Luo LSH- based method, namely Cost-effective LSH filter (Ce-LSH for short), for pairwise mining. Compared with previous LSH-type methods, it uses a lower fixed number of LSH functions and is thus more cost-effective

Cao, Longbing

308

Detection and Prediction of Adverse and Anomalous Events in Medical Robots Kai Liang, Feng Cao, Zhuofu Bai, Mark Renfrew, M. Cenk C avusoglu, Andy Podgurski, Soumya Ray  

E-print Network

Detection and Prediction of Adverse and Anomalous Events in Medical Robots Kai Liang, Feng Cao, zxb31, mark.renfrew, mcc14, podgurski, sray}@case.edu Abstract Adverse and anomalous (A&A) events Intelligence (www.aaai.org). All rights reserved. event reports filed by manufacturers with the Food and Drug

Cavusoglu, Cenk

309

Growth of Thin InAlP Native Oxides for GaAs Metal-Oxide-Semiconductor Devices Mr. Ying Cao1  

E-print Network

Growth of Thin InAlP Native Oxides for GaAs Metal-Oxide-Semiconductor Devices Mr. Ying Cao1 ; Ms thermal native oxides towards thicknesses suitable for use in GaAs metal-oxide-semiconductor (MOS) devices, we observed that thin 7 nm oxide films showed Schottky-diode-like behavior with relatively large

310

FOURIER TRANSFORM INFRARED PHOTOACOUSTIC SPECTROSCOPY CHARACTERIZATION OF SULFUR-OXYGEN SPECIES RESULTING FROM THE REACTION OF SO2 WITH CAO AND CACO3  

EPA Science Inventory

Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) has been used to investigate the reaction of SO2 in He with CaO and CaCO3 particles at temperatures between 25 and 900 C. SO2 reacts with CaC at 25 C, while the reaction of Ca-CO3 with SO2 is first evident at 550 C ...

311

Long lasting blue phosphorescence and photostimulated luminescence in 12CaO?7Al2O3:Eu thin films grown by pulsed laser deposition  

NASA Astrophysics Data System (ADS)

Long lasting blue emitting Eu-doped 12CaO?7Al2O3 thin films have been prepared on quartz substrates by pulsed laser deposition combined with post-annealing. The 12CaO?7Al2O3 phase is formed after annealing the films above 900 °C in vacuum ambient. Upon 323 nm excitation, the thin films exhibit a blue long lasting emission peaked at 444 nm, assigned to the 5d-4f transitions of Eu2+. The films annealed at 950 °C have stronger luminescence and longer lasting time than that annealed at 900 °C. The phosphorescence intensity of vacuum annealed film is better than that annealed in H2/N2 atmosphere, which might be due to the increase of shallow trap numbers during the vacuum annealing process. Thermoluminescence curves demonstrate that vacuum and H2/N2 atmosphere annealing could introduce a large number of both shallow and deep traps into 12CaO?7Al2O3:Eu thin films. After UV irradiation, excellent photostimulated luminescence can be observed under 980 nm excitation. Our results suggest that 12CaO?7Al2O3:Eu phosphor may serve as a promising blue luminescent materials used in fabrication of optical storage and illumination in dark environments.

Zhu, Hancheng; Liu, Yuxue; Yan, Duanting; Bian, Hongyu; Li, Shengnan; Liu, Chunguang; Xu, Changshan; Wang, Xiaojun

2014-09-01

312

Shape transition of unstrained flattest single-walled carbon nanotubes under pressure Weihua Mu, Jianshu Cao, and Zhong-can Ou-Yang  

E-print Network

Shape transition of unstrained flattest single-walled carbon nanotubes under pressure Weihua Mu single-walled carbon nanotubes under pressure Weihua Mu,1,2,3,a) Jianshu Cao,1,4,b) and Zhong-can Ou section of a single walled carbon nanotube successively deforms from the original round shape to oval

Cao, Jianshu

313

Hydrogen-rich gas production via CaO sorption-enhanced steam gasification of rice husk: a modelling study.  

PubMed

Gasification is a thermochemical process in which solid or liquid fuels are transformed into synthesis gas through partial oxidation. In this paper, a kinetic model of rice husk gasification has been developed, which is interesting for the applications of the syngas produced. It is a zero-dimensional, steady-state model based on global reaction kinetic, empirical correlation of pyrolysis and is capable of predicting hydrogen yield in the presence of sorbent CaO. The model can also be used as a useful tool to investigate the influence of process parameters including steam/biomass ratio, CaO/fuel ratio (CaO/Fuel), and gasification temperature on hydrogen efficiency, CO2 capture ratio (CCR), and average carbonation conversion (Save). Similar to hydrogen formation, CCR also increases with increasing CaO/Fuel, but an opposite trend is exhibited in Save. Model predictions were compared with available data from the literature, which showed fairly good agreement. PMID:25403373

Beheshti, Sayyed Mohsen; Ghassemi, Hojat; Shahsavan-Markadeh, Rasoul; Fremaux, Sylvain

2014-12-01

314

Environmental controls on plant chemical traits: Using the CAO-VSWIR to characterize patterns in a mediterranean-type ecosystem  

NASA Astrophysics Data System (ADS)

Here we present results from a new imaging spectrometer, the Carnegie Airborne Observatory's (CAO) Visible-Short Wave Infrared (VSWIR) sensor, and we use these data to map key plant functional traits in a semi-arid ecosystem, Jasper Ridge Biological Preserve (Woodside, CA USA). We considered four fundamental plant traits: leaf nitrogen per mass (Nmass, %), leaf carbon per mass (Cmass, %), leaf water fraction (WL), and canopy water fraction (WC).With these maps we ask the following questions: (1) How do these traits vary with environmental gradients and land use history, independent of species composition? (2) Does information about plant community improve our ability to explain trait patterns? And (3) what does the variation within plant communities tell us about the underlying processes driving or limiting this ecosystem? We show that the new CAO-VSWIR combined with partial least squares regression can effectively map these four plant chemical traits across multiple plant functional types (observed v. predicted R2s ranging from 0.55 for WL to 0.84 for Cmass). To consider how these traits varied with environmental gradients we used simultaneous autoregressive modeling and found, in general, that environment and land-use history together explained about a quarter of the variation in each trait, but that information about plant community boundaries dramatically improved our predictive power. While 29 - 44% of the variation in these four traits remained unexplained, when we considered the trait distributions within each plant community we found that most plant communities were sharply peaked (leptokurtic) or near normal, while a few communities were more evenly distributed (platykurtic) for each trait. These results show that, even though environmental gradients play a small but significant role, most of the plant communities at Jasper Ridge are characterized by a narrow range of trait patterns. For the few communities that are highly divergent, possible causal factors include resource limitation, competition, and/or past disturbances.

Dahlin, K.; Asner, G. P.; Field, C. B.

2012-12-01

315

A Systematic Review of the Mysterious Caterpillar Fungus Ophiocordyceps sinensis in Dong-ChongXiaCao (???? D?ng Chóng Xià C?o) and Related Bioactive Ingredients  

PubMed Central

The caterpillar fungus Ophiocordyceps sinensis (syn.† Cordyceps sinensis), which was originally used in traditional Tibetan and Chinese medicine, is called either “yartsa gunbu” or “DongChongXiaCao (???? D?ng Chóng Xià C?o)” (“winter worm-summer grass”), respectively. The extremely high price of DongChongXiaCao, approximately USD $20,000 to 40,000 per kg, has led to it being regarded as “soft gold” in China. The multi-fungi hypothesis has been proposed for DongChongXiaCao; however, Hirsutella sinensis is the anamorph of O. sinensis. In Chinese, the meaning of “DongChongXiaCao” is different for O. sinensis, Cordyceps spp.,‡ and Cordyceps spƒ. Over 30 bioactivities, such as immunomodulatory, antitumor, anti-inflammatory, and antioxidant activities, have been reported for wild DongChongXiaCao and for the mycelia and culture supernatants of O. sinensis. These bioactivities derive from over 20 bioactive ingredients, mainly extracellular polysaccharides, intracellular polysaccharides, cordycepin, adenosine, mannitol, and sterols. Other bioactive components have been found as well, including two peptides (cordymin and myriocin), melanin, lovastatin, ?-aminobutyric acid, and cordysinins. Recently, the bioactivities of O. sinensis were described, and they include antiarteriosclerosis, antidepression, and antiosteoporosis activities, photoprotection, prevention and treatment of bowel injury, promotion of endurance capacity, and learning-memory improvement. H. sinensis has the ability to accelerate leukocyte recovery, stimulate lymphocyte proliferation, antidiabetes, and improve kidney injury. Starting January 1st, 2013, regulation will dictate that one fungus can only have one name, which will end the system of using separate names for anamorphs. The anamorph name “H. sinensis” has changed by the International Code of Nomenclature for algae, fungi, and plants to O. sinensis. PMID:24716152

Lo, Hui-Chen; Hsieh, Chienyan; Lin, Fang-Yi; Hsu, Tai-Hao

2013-01-01

316

7 CFR 52.38b - Statistical sampling procedures for on-line inspection by attributes of processed fruits and...  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Statistical sampling procedures for on-line inspection by attributes...Regulations Governing Inspection and Certification Sampling § 52.38b Statistical sampling procedures for on-line inspection by...

2010-01-01

317

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

318

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

PubMed Central

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 (4.75 hours CME credit) about communication skills during pediatric visits that included a mental health concern; each module included a brief case, a multiple choice question, an explanation, and a 1–2 minute video demonstrating key skills. Specific communication skills included: greeting, setting an agenda, discussing diagnosis and treatment, and managing negative interactions. The course was announced by emails in spring, 2007; the course was available on-line for 60 days; we aimed to enroll 50 clinicians. Outcomes were analyzed for those who evaluated the course within 75 days of its initial availability. Results Overall, 61 clinicians registered, of whom most were nurses (N = 24), physicians (N = 22), or psychologists or social workers (N = 12). Of the 36 (59%) clinicians who evaluated the course, over 85% agreed that all course objectives had been met; over 90% reported greater confidence in greetings and agenda-setting; and over 80% reported greater confidence in discussing diagnosis and treatment and managing negative interactions. Nearly all, 97% would recommend the course to other clinicians and trainees. Suggestions for improvement included a library of additional video vignettes and written materials to accompany the on-line training. Conclusion On-line training in communication skills for pediatric mental health visits is feasible, desirable and associated with increased confidence in key skills. Positive feedback from clinicians suggests that a comparison of on-line versus in-person training is warranted. PMID:18267028

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

2008-01-01

319

Development of On-line Liquid Chromatography-Biochemical Detection for Soluble Epoxide Hydrolase Inhibitors in Mixtures  

E-print Network

ORIGINAL Development of On-line Liquid Chromatography-Biochemical Detection for Soluble Epoxide system (BCD) was coupled on-line to liquid chromatography (LC) to allow mixture analysis. The on-line BCD providingnew opportunities in the development of drug candidates. Keywords Column liquid chromatography Á On

Hammock, Bruce D.

320

Targeted ?-Therapy  

PubMed Central

Monoclonal antibodies have become a viable strategy for the delivery of therapeutic, particle emitting radionuclides specifically to tumor cells to either augment anti-tumor action of the native antibodies or to solely take advantage of their action as targeting vectors. Proper and rational selection of radionuclide and antibody combinations is critical to making radioimmunotherapy (RIT) a standard therapeutic modality due to the fundamental and significant differences in the emission of either ?- and ?-particles. The ?-particle has a short path length (50-80 ?m) that is characterized by high linear energy transfer (?100 keV/?m). Actively targeted ?-therapy potentially offers a more specific tumor cell killing action with less collateral damage to the surrounding normal tissues than ß-emitters. These properties make targeted ?-therapy appropriate therapies to eliminate of minimal residual or micrometastatic disease. RIT using ?-emitters such as 213Bi, 211At, 225Ac, and others has demonstrated significant activity in both in vitro and in vivo model systems. Limited numbers of clinical trials have progressed to demonstrate safety, feasibility, and therapeutic activity of targeted ?-therapy, despite having to traverse complex obstacles. Further advances may require more potent isotopes, additional sources and more efficient means of isotope production. Refinements in chelation and/or radiolabeling chemistry combined with rational improvements of isotope delivery, targeting vectors, molecular targets, and identification of appropriate clinical applications remains as active areas of research. Ultimately, randomized trials comparing targeted ?-therapy combined with integration into existing standard of care treatment regimens will determine the clinical utility of this modality. PMID:17992276

Brechbiel, Martin W.

2008-01-01

321

An on-line calibration algorithm for external parameters of visual system based on binocular stereo cameras  

NASA Astrophysics Data System (ADS)

Stereo vision is the key in the visual measurement, robot vision, and autonomous navigation. Before performing the system of stereo vision, it needs to calibrate the intrinsic parameters for each camera and the external parameters of the system. In engineering, the intrinsic parameters remain unchanged after calibrating cameras, and the positional relationship between the cameras could be changed because of vibration, knocks and pressures in the vicinity of the railway or motor workshops. Especially for large baselines, even minute changes in translation or rotation can affect the epipolar geometry and scene triangulation to such a degree that visual system becomes disabled. A technology including both real-time examination and on-line recalibration for the external parameters of stereo system becomes particularly important. This paper presents an on-line method for checking and recalibrating the positional relationship between stereo cameras. In epipolar geometry, the external parameters of cameras can be obtained by factorization of the fundamental matrix. Thus, it offers a method to calculate the external camera parameters without any special targets. If the intrinsic camera parameters are known, the external parameters of system can be calculated via a number of random matched points. The process is: (i) estimating the fundamental matrix via the feature point correspondences; (ii) computing the essential matrix from the fundamental matrix; (iii) obtaining the external parameters by decomposition of the essential matrix. In the step of computing the fundamental matrix, the traditional methods are sensitive to noise and cannot ensure the estimation accuracy. We consider the feature distribution situation in the actual scene images and introduce a regional weighted normalization algorithm to improve accuracy of the fundamental matrix estimation. In contrast to traditional algorithms, experiments on simulated data prove that the method improves estimation robustness and accuracy of the fundamental matrix. Finally, we take an experiment for computing the relationship of a pair of stereo cameras to demonstrate accurate performance of the algorithm.

Wang, Liqiang; Liu, Zhen; Zhang, Zhonghua

2014-11-01

322

SAR image data compression for an on-line archive system  

NASA Technical Reports Server (NTRS)

This paper summarizes the investigation of SAR image data compression for an on-line archive data distribution system. This system is planned for the ground processing system of Alaska SAR Facility (ASF) and Shuttle Imaging Radar (SIR-C). The objective of the SAR image data compression is to enable the data archive system to provide the remote users a large data base with good image quality, short response time, low transfer cost, and minimal decoding complexity. The requirements and limitations of the on-line archive data distribution system are presented. The effects of SAR image data characteristics on data compression are addressed. The users' survey results suggest that compression ratios between 10:1 and 20:1 appear suitable. Based on the algorithm evaluation results, the two-level tree-searched vector quantization technique has been recommended as the SAR image data compression algorithm for the on-line archive data distribution system.

Chang, C. Y.; Kwok, R.; Curlander, J. C.

1987-01-01

323

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

2011-08-01

324

Reversed phase HPLC-FTIR by on-line extraction and solvent elimination  

NASA Astrophysics Data System (ADS)

A reversed phase LC-FTIR interface is described using on-line extraction of the aqueous effluent with a volatile organic solvent in conjunction with a solvent eliminating spray-jet device. Results are shown of the analysis of a 2. 10-4 M solution of acenaphthenequinone, phenanthrenequinone and two polar pesticides linuron and diuron. The mixture was separated with a mobile phase of acetonitrile-phosphate buffer and post-column extracted with dichloro-methane. Detection was carried out by FTIR transmission microscopy. The characteristics of the on-line extraction system are discussed in relation to results obtained from a direct deposition method.

Somsen, G. W.; Gooijer, Cees; Brinkman, Udo A. T.; Velthorst, Nel H.; Visser, T.

1994-01-01

325

Algorithms for on-line aggregate production plan revision with stochastic autocorrelated demand  

E-print Network

ALGORITHMS FOR. ON-LINE AGGREGATE PRODUCTION PLAN REVISION WITH STOCHASTIC AUTOCORRELATED DEMAND A Thesis ZIXl'Alf DiiXG Sul&mitted to the Once of Graduate Studies of Texas AI-M T. 'niversity irt partial fulfillment ol' the reqrurements... for the degree of MASTER OF S(IEalGE December 1989 Major Subject: Industrial Engineering ALGORITHMS FOR ON-LINE AGGREGATE PRODUCTION PLAN REVISION WITH STOCHASTIC AUTOCORRELATED DEMAND A Thesis by ZITI'sit't DI'XG Approvecl as to style lad coiit alit...

Ding, Zixuan

1989-01-01

326

Note: On-line weak signal detection via adaptive stochastic resonance  

NASA Astrophysics Data System (ADS)

We design an instrument with a novel embedded adaptive stochastic resonance (SR) algorithm that consists of a SR module and a digital zero crossing detection module for on-line weak signal detection in digital signal processing applications. The two modules are responsible for noise filtering and adaptive parameter configuration, respectively. The on-line weak signal detection can be stably achieved in seconds. The prototype instrument exhibits an advance of 20 dB averaged signal-to-noise ratio and 5 times averaged adjust R-square as compared to the input noisy signal, in considering different driving frequencies and noise levels.

Lu, Siliang; He, Qingbo; Kong, Fanrang

2014-06-01

327

Note: On-line weak signal detection via adaptive stochastic resonance.  

PubMed

We design an instrument with a novel embedded adaptive stochastic resonance (SR) algorithm that consists of a SR module and a digital zero crossing detection module for on-line weak signal detection in digital signal processing applications. The two modules are responsible for noise filtering and adaptive parameter configuration, respectively. The on-line weak signal detection can be stably achieved in seconds. The prototype instrument exhibits an advance of 20 dB averaged signal-to-noise ratio and 5 times averaged adjust R-square as compared to the input noisy signal, in considering different driving frequencies and noise levels. PMID:24985875

Lu, Siliang; He, Qingbo; Kong, Fanrang

2014-06-01

328

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

2011-01-15

329

An on-line monitoring system for oil-film, pressure and temperature distributions in large-scale hydro-generator bearings  

NASA Astrophysics Data System (ADS)

Instrumentation that allows the behaviour of a hydro-generator thrust bearing to be monitored during operation is described. The measurement system was developed at the Asea Brown Boveri corporate research centre in Switzerland and was tested under realistic operating conditions at the Harbin Electric Machinery Company bearing-testing facility in the People's Republic of China. Newly developed fibre-optical proximity probes were used for the on-line monitoring of the thin oil film between the static and rotating parts of the bearing. These sensors are based on a back-reflection technique and can be used for various target materials such as Babbitt and Teflon. The monitoring system comprises about 120 temperature sensors, four pressure sensors and five optical oil-film thickness sensors. Temperature sensors are installed at specific static locations, whereas pressure and oil-film sensors are positioned in the runner and generate data during rotation. A special feature of the monitoring equipment is its on-line processing capability. Digital signal processors operating in parallel handle pressure and oil-film thickness data. Important measurement parameters such as the maximum pressure, maximum temperature and minimum oil-film thickness are displayed on-line. Detailed three-dimensional temperature information on one of the load segments can be obtained from subsequent off-line data analysis. The system also calculates two-dimensional plots of the oil-film thickness and pressure for most of the 12 load segments.

Höbel, M.; Haffner, K.

1999-05-01

330

Evidence for a proprioception-based rapid on-line error correction mechanism for hand orientation during reaching movements in blind subjects.  

PubMed

The contribution of visual experience to the perception and sensorimotor control of spatial orientation of the hand was investigated in blind subjects. In "orientation-matching" tasks, subjects aligned a match handle held in their right hand to a target handle held in their left hand and fixed in different orientations, with both arms outstretched. In "letter-posting" task 1, the same subjects reached out and simultaneously oriented their right hand to insert the match handle into a target slot fixed in the same range of orientations. Orientations were signaled proprioceptively by a reference handle held in the left hand. Final hand orientation errors were smaller when blind subjects simultaneously reached out and rotated their hand to insert the match handle into the target slot in letter-posting task 1 than when they held their arm extended and aligned the handles in the orientation-matching task. In letter-posting task 2, blind subjects first aligned their hand to the orientation of the target and then subsequently reached to the target with the instruction to not change hand orientation during reaching. Despite the instruction, subjects showed a reduction in absolute hand orientation error from the beginning to the end of the reach. In all tasks, performance of blind subjects was very similar to that of blindfolded normally sighted subjects. These findings provide the first evidence of an automatic on-line error-correction mechanism for hand orientation guided only by proprioceptive inputs during reaching in blind subjects, and reveal that the on-line mechanism does not depend on prior visual experience. PMID:19295154

Gosselin-Kessiby, Nadia; Kalaska, John F; Messier, Julie

2009-03-18

331

Targeted Training.  

ERIC Educational Resources Information Center

Describes the use of data on student achievement to create more effective professional development programs for teachers. Profiles the Pella Community School District, Pella, Iowa, and the Glendale Union High School District, Glendale, Arizona. Includes questions and answers on initial targets and first steps in planning professional development…

Sanborn, Jane

2002-01-01

332

The Vibrational Frequencies of CaO2, ScO2, and TiO2: A Comparison of Theoretical Methods  

NASA Technical Reports Server (NTRS)

The vibrational frequencies of several states of CaO2, ScO2, and TiO2 are computed at using density functional theory (DFT), the Hatree-Fock approach, second order Moller-Plesset perturbation theory (MP2), and the complete-active-space self-consistent-field theory. Three different functionals are used in the DFT calculations, including two hybrid functionals. The coupled cluster singles and doubles approach including the effect of unlinked triples, determined using perturbation theory, is applied to selected states. The Becke-Perdew 86 functional appears to be the cost effective method of choice, although even this functional does not perform well for one state of CaO2. The MP2 approach is significantly inferior to the DFT approaches.

Rosi, Marzio; Bauschlicher, Charles W., Jr.; Chertihin, George V.; Andrews, Lester; Arnold, James O. (Technical Monitor)

1997-01-01

333

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

334

The effect of Al2O3, CaO, Cr2O3 and MgO on devitrification of silica  

NASA Technical Reports Server (NTRS)

The effect of doping on devitrification of vitreous silica was studied at 1100, 1200, and 1300 C. Dispersion of dopants on a molecular scale was accomplished via a sol-gel technique. All dopants accelerated the devitrification of silica but to different degrees. The most active was CaO followed by MgO, Al2O3, and Cr2O3. Pure silica and silica containing Cr2O3 and Al2O3 devitrified to alpha-cristobalite only, whereas silica doped with CaO and MgO produced alpha-quartz and alpha-cristobalite. It appears that prolonged heat treatment would cause alpha-quartz to transform to alpha-cristobalite.

Zaplatynsky, Isidor

1988-01-01

335

Preparation of CaO as OLED getter material through control of crystal growth of CaCO{sub 3} by block copolymers in aqueous solution  

SciTech Connect

As the starting materials of organic light-emitting diode (OLED) getter, calcium carbonate (CaCO{sub 3}) particles with various shapes and crystal structures have been successfully prepared with additives (L64 or PEGPG), which contain blocks of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO). These CaCO{sub 3} particles were calcinated into highly crystalline calcium oxide (CaO) nanoparticles with high capacity of water adsorption up to 14.23 wt.%. The CaCO{sub 3} and CaO particles prepared at various conditions were characterized using the field emission scanning electron microscopy (FE-SEM), Fourier transform infrared microscopy (FT-IR), X-ray powder diffraction (XRD), and dynamic vapor sorption (DVS) method.

Park, Jae-Hyung [Department of Chemical Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Oh, Seong-Geun [Department of Chemical Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)], E-mail: seongoh@hanyang.ac.kr

2009-01-08

336

BC Hydro's on-line transient stability assessment (TSA) model development, analysis and post-processing  

Microsoft Academic Search

This paper presents the theoretical background and analytical methods developed for BC Hydro's on-line transient stability assessment (TSA) module. It concentrates on the preprocessing modeling, stability analysis\\/margin calculation and post processing techniques, the architecture, hardware and implementation are presented in a companion paper. BC Hydro's TSA has been tested with thousands of cases using a large scale detailed basecase derived

Y. Mansour; E. Vaahedi; A. Y. Chang; B. R. Corns; B. W. Garrett; K. Demaree; T. Athay; K. Cheung

1995-01-01

337

The Impact of Recurrent On-Line Synchronous Scientific Argumentation on Students' Argumentation and Conceptual Change  

ERIC Educational Resources Information Center

This study reports the impact of Recurrent On-Line Synchronous Scientific Argumentation learning on 8th grade students' scientific argumentation ability and conceptual change involving physical science. The control group (N = 76) were recruited to receive conventional instruction whereas the experimental group (N = 74) received the Recurrent…

Chen, Chien-Hsien; She, Hsiao-Ching

2012-01-01

338

EMPIRICALLY DETERMINED RESPONSE MATRICES FOR ON-LINE ORBIT AND ENERGY CORRECTION AT THOMAS JEFFERSON  

E-print Network

EMPIRICALLY DETERMINED RESPONSE MATRICES FOR ON-LINE ORBIT AND ENERGY CORRECTION AT THOMAS this feedback system to use empirically determined response matrices whereby the software introduces small orbit Accelerator Facility's (CEBAF) electron beam orbit and energy. Previous incarnations of these loops used

339

Waste Evaluation Request Fill in on-line then print and sign  

E-print Network

Waste Evaluation Request Fill in on-line then print and sign Fax to: 206-685-2915 Otherwise mail to Box Number Waste Name WASTE COMPOSITION List all components of waste. For solutions and mixtures Option 1-1a-1b-1c Oxidizer: (Circle one) + - Disposal Option 2 PH: RQ: Other: UN Number Zone: Waste Codes

Wilcock, William

340

November 23, 2011 Penn State Offers on-line Nanotechnology Certificate Program  

E-print Network

November 23, 2011 Penn State Offers on-line Nanotechnology Certificate Program Courses start-line Nanotechnology Certificate. This Certificate is composed of six 3-credit courses. The first two courses (E SC 211 wish to improve their nanotechnology background knowledge and skills. The complete listing

Lee, Dongwon

341

Sweeping and new on-line sample preconcentration techniques in capillary electrophoresis.  

PubMed

Sweeping is a powerful on-line sample preconcentration technique that improves the concentration sensitivity of capillary electrophoresis (CE). This approach is designed to focus the analyte into narrow bands within the capillary, thereby increasing the sample volume that can be injected, without any loss of CE efficiency. It utilizes the interactions between an additive [i.e., a pseudostationary phase (PS) or complexing agent] in the separation buffer and the sample in a matrix that is devoid of the additive used. The accumulation occurs due to chromatographic partitioning, complexation or any interaction between analytes and the additive through electrophoresis. The extent of the preconcentration is dependent on the strength of interaction involved. Both charged and neutral analytes can be preconcentrated. Remarkable improvements--up to several thousandfold--in detection sensitivity have been achieved. This suggests that sweeping is a superior and general approach to on-line sample preconcentration in CE. The focusing mechanism of sweeping under different experimental conditions and its combination with other on-line preconcentration techniques are discussed in this review. The recently introduced techniques of transient trapping (tr-trapping) and analyte focusing by micelle collapse (AFMC) as well as other novel approaches to on-line sample preconcentration are also described. PMID:19255749

Aranas, Agnes T; Guidote, Armando M; Quirino, Joselito P

2009-05-01

342

Rapid narrow band elution for on-line SPE using a novel solvent plug injection technique.  

PubMed

Determination of trace constituents in biological and environmental samples usually requires a pre-concentration step. While solid-phase extraction (SPE) has been widely used, it is slow, labor intensive and adversely affected by analytical errors from handling. On-line SPE eliminates some of the flaws but often suffers from solvent compatibility problems with the subsequent chromatography separation. In this study, we are presenting a technical solution for overcoming some of these compatibility issues, by utilizing a fully automated, focused SPE sample transfer technique utilizing narrow-band solvent plugs, for seamless hyphenation with high-performance liquid chromatography (HPLC) or flow injection mass spectrometry (MS). A wide range of pharmaceutical compounds was studied in different sample matrices. Short plugs of high elution strength solvent were generated by means of an electrically actuated sample loop and enrichment and transfer steps monitored using on-line SPE-MS. The impact of the solvent plugs on chromatographic separation was studied using hyphenated SPE-LC-MS. By carefully examining elution profiles of solvent plugs of different compositions, optimum conditions for quantitative elution within well-defined volumes were found for all substances. In addition, the highly focused elution bands resulted in excellent retention time and peak area reproducibilities when injected on-line onto HPLC columns. Finally, to demonstrate proof-of-principle, the fully integrated on-line SPE-LC-MS system was applied to the analysis of spiked urine and river water samples. PMID:22669308

Gode, David; Martin, Markus M; Steiner, Frank; Huber, Christian G; Volmer, Dietrich A

2012-08-01

343

A New Industry Sprouts Up to Help Professors Put Courses On Line.  

ERIC Educational Resources Information Center

A fledgling industry of software developers, academic technologists, and instructors is emerging to help college faculty put courses on line without having to learn World Wide Web page coding. A variety of design services is available. Often, institutions make recommendations for choosing Web-course tools. Software focuses on general course…

McCollum, Kelly

1997-01-01

344

Malicious web page detection based on on-line learning algorithm  

Microsoft Academic Search

The Internet has become an indispensable tool in peoples’ daily life. It also bring us serious computer security problem. One big security threat comes from malicious webpages. In this paper we study how to detect malicious pages. Since malicious webpages are generated inconstantly, we use on line learning methods to detect malicious webpages. To keep the client side as safe

Wen Zhang; Yu-Xin Ding; Yan Tang; Bin Zhao

2011-01-01

345

N-Gram and N-Class Models for On line Handwriting Recognition  

Microsoft Academic Search

This paper highlights the interest of a language model in increasing the performances of on-line handwriting recognition systems. Models based on statistical approaches, trained on written corpora, have been investigated. Two kinds of models have been studied: n- gram models and n-class models. In the latter case, the classes result either from a syntactic criteria or a contextual criteria. In

Freddy Perraud; Christian Viard-gaudin; Emmanuel Morin; Pierre-Michel Lallican

2003-01-01

346

The On-Line ERIC Project at the National Library of Australia.  

ERIC Educational Resources Information Center

This report describes the On-Line ERIC Project conducted jointly by the National Library of Australia and by IBM Australia Ltd. between March and May 1976. The Project involved a telecommunications network with video terminals and printers linking the National Library, the Royal Melbourne Institute of Technology Central Library, and Macquarie…

McCallum, Ian S.

347

A Stable On-line Algorithm for Energy Efficient Multi-user Scheduling  

E-print Network

1 A Stable On-line Algorithm for Energy Efficient Multi-user Scheduling Nitin Salodkar, Abhay to minimize one cost (average power) subject to a hard constraint on another (average delay). We do not assume and optimality properties of the algorithm. We also demonstrate the efficacy of the algorithm through simulations

Karandikar, Abhay

348

An Asymptotically Optimal On-Line Algorithm for Parallel Machine Scheduling  

E-print Network

Jobs arriving over time must be non-preemptively processed on one of m parallel machines, each of which running at its own speed, so as to minimize a weighted sum of the job completion times. In this on-line environment, ...

Chou, Mabel

349

On-Line Fault Diagnosis of Dynamic Systems via Robust Parameter Identification Gerard Blocha  

E-print Network

On-Line Fault Diagnosis of Dynamic Systems via Robust Parameter Identification G´erard Blocha of faults, their isolation and their identification is presented. The systems considered are MISO systems knowledge of the faults which can occur is used. The faults modeled here are outliers, biases or drifts

Paris-Sud XI, Université de

350

Section I On-Line Issues: I I. Online Intellectual Property Cases Test Copyright, Free  

E-print Network

Section I On-Line Issues: I I. Online Intellectual Property Cases Test Copyright, Free Speech/FAM2002/Online_I.html #12;In one of the first cases brought under the DMCA, the movie industry sued before making them widely available for electronic distribution. For example, movie studios today usually

Shamos, Michael I.

351

Development and evaluation of on-line detection techniques for polar organics in ultrapure water  

Microsoft Academic Search

An on-line monitor that can perform rapid, trace detection of polar organics such as acetone and isopropanol in ultrapure water (UPW) is necessary to efficiently recycle water in semiconductor manufacturing facilities. The detection of these analytes is problematic due to their high solubility in water, resulting in low partitioning into sensor coatings for direct water analysis or into the vapor

G. C. Frye; D. S. Blair; T. W. Schneider; C. D. Mowry; C. W. Colburn; R. P. Donovan

1996-01-01

352

The On-Line Processing of Verb-Phrase Ellipsis in Aphasia  

ERIC Educational Resources Information Center

We investigate the on-line processing of verb-phrase ellipsis (VPE) constructions in two brain injured populations: Broca's and Anomic aphasics. VPE constructions are built from two simple clauses; the first is the antecedent clause and the second is the ellipsis clause. The ellipsis clause is missing its verb and object (i.e., its verb phrase…

Poirier, Josee; Shapiro, Lewis P.; Love, Tracy; Grodzinsky, Yosef

2009-01-01

353

A Microcomputer Based On-Line Identification Approach to Power System Dynamic Load Modelling  

Microsoft Academic Search

An on-line method for the development of power system load models using system identification techniques is presented. The modelling procedure involves the selection of the load model structure as well as the estimation of the load model parameters. A load model structure selection technique based on the model reference error cost function is used and a square root based least

T. Dovan; T. S. Dillon; C. S. Berger; K. E. Forward

1987-01-01

354

3081/E emulator, a processor for use in on-line and off-line arrays  

SciTech Connect

This paper presents a status report on the 3081/E covering the processor hardware, interfacing capability, and accompanying software. Details of production figures and preliminary performance results are given. Plans for the use of arrays of 3081/Es for parallel event processing in both on-line and off-line systems are outlined.

Ferran, P.M.; Fucci, A.; Gallno, P.; Hinton, R.; Jacobs, D.; Kudla, M.; Martin, B.; Masuch, H.; Storr, K.M.; Gravina, M.

1985-08-01

355

On-line monitoring of flue gas desulfurization scrubber corrosion with electrochemical techniques  

Microsoft Academic Search

Progress on an Electric Power Research Institute (EPRI) sponsored program to investigate the applicability of advanced electrochemical techniques for on-line monitoring of corrosion in flue gas desulfurization (FGD) systems is summarized. The approach combines technology previously developed in England for studying acid dewpoint corrosion with the on-going American research into the causes of corrosion damage in FGD systems. First, the

W. M. Cox; B. S. Phull; B. A. Wrobel; B. C. Syrett

1986-01-01

356

Continuous On-Line Measurement of Lignin Concentration in Wood Pulp  

E-print Network

We are working toward the development of an instrument for the continuous, on-line measurement of the lignin concentration in wood pulp. The instrument is based on laser induced fluorescence of the wood pulp and is to be used as a primary sensor...

Jeffers, L. A.; Roman, G. W.

357

Design Features of On-Line Anatomy Information Resources: A Comparison with the Digital Anatomist  

E-print Network

. In addition to videodisks and CD-ROMs, hundreds of anatomy web sites present Visible Human and other1 Design Features of On-Line Anatomy Information Resources: A Comparison with the Digital Anatomist for learning and teaching anatomy as medical students, and have also examined available anatomy web sites

Washington at Seattle, University of

358

ON-LINE OPTIMIZATION, ENERGY ANALYSIS AND ENVIRONMENTAL IMPACT ASSESSMENT OF SULFURIC ACID CATALYZED ALKYLATION  

E-print Network

ON-LINE OPTIMIZATION, ENERGY ANALYSIS AND ENVIRONMENTAL IMPACT ASSESSMENT OF SULFURIC ACID in sulfuric acid consumption potentially could be obtained. 1. Introduction Alkylation process is one and procedures (Albright 1990, Cupit et al. 1961). In this study a commercial sulfuric acid catalyzed alkylation

Pike, Ralph W.

359

ON-LINE ALGORITHMS FOR PATH SELECTION IN A NONBLOCKING NETWORK  

E-print Network

. ARORA AND F. T. LEIGHTON AND B. M. MAGGS Bob Ted Pat Vanna Carol Alice Fig. 1.1. A nonblocking networkON-LINE ALGORITHMS FOR PATH SELECTION IN A NONBLOCKING NETWORK SANJEEV ARORA , F. THOMSON LEIGHTON AMS subject classifications. 68M10, 90B12, 94C10 1. Introduction. 1.1. Definitions. Nonblocking

Arora, Sanjeev

360

On the power of lookahead in on-line server routing problems  

Microsoft Academic Search

We study the usefulness of lookahead in online server routing problems: if an on- line algorithm is not only informed about the requests released so far, but also has a limited ability to foresee future requests, what is the improvement that can be achieved in terms of the competitive ratio? We consider several online server routing problems in this setting,

Luca Allulli; Giorgio Ausiello; Vincenzo Bonifaci; Luigi Laura

2008-01-01

361

Overview of RSA Public Key Cryptography Cryptography [This material is available on-line at  

E-print Network

Overview of RSA Public Key Cryptography Cryptography [This material is available on-line at http using her public key. Public-key cryptography generates a public key and a private key by using) would be 1024 bits. Details of RSA cryptography and other cryptography techniques can be found

Kulkarni, Vidyadhar G.

362

RISK ASSESSMENT ANALYSES USING EPA'S ON-LINE SITE-SPECIFIC TRANSPORT MODELS AND FIELD DATA  

EPA Science Inventory

EPA has developed a suite of on-line calculators and transport models to aid in risk assessment for subsurface contamination. The calculators (www.epa.gov/athens/onsite) provide several levels of tools and data. These include tools for generating commonly-used model input param...

363

Author On-Line: Using Asynchronous Computer Conferencing To Support Literacy.  

ERIC Educational Resources Information Center

Describes the Author-On-Line (AOL) project that used asynchronous computer conferencing to support the teaching and learning of literacy with pupils aged 10-12 years from two schools in Ireland. Presents the AOL-APT model which summarizes the key components: Author, Pedagogy and Technology (APT); and discusses its value for online, social,…

Clarke, Linda; Heaney, Peter

2003-01-01

364

A Grid Approach to Provide Effective Awareness to On-line Collaborative Learning Teams  

E-print Network

-line collaborative learning teams is a challenging issue since it is essential to keep participants informed of both the collaborative learning process more objectively and to model students' behavior more efficiently. In orderA Grid Approach to Provide Effective Awareness to On-line Collaborative Learning Teams S. Caballé

Boyer, Edmond

365

On-line test of power distribution prediction system for boiling water reactors  

SciTech Connect

A power distribution prediction system for boiling water reactors has been developed and its on-line performance test has proceeded at an operating commercial reactor. This system predicts the power distribution or thermal margin in advance of control rod operations and core flow rate change. This system consists of an on-line computer system, an operator's console with a color cathode-ray tube, and plant data input devices. The main functions of this system are present power distribution monitoring, power distribution prediction, and power-up trajectory prediction. The calculation method is based on a simplified nuclear thermal-hydraulic calculation, which is combined with a method of model identification to the actual reactor core state. It has been ascertained by the on-line test that the predicted power distribution (readings of traversing in-core probe) agrees with the measured data within 6% root-mean-square. The computing time required for one prediction calculation step is less than or equal to 1.5 min by an HIDIC-80 on-line computer.

Nishizawa, Y.; Kiguchi, T.; Kobayashi, S.; Takumi, K.; Tanaka, H.; Tsutsumi, R.; Yokomi, M.

1982-07-01

366

On-line optimization and choice of optimization variables for control of heat exchanger networks  

E-print Network

On-line optimization and choice of optimization variables for control of heat exchanger networks B operation of a general heat exchanger network with given structure, heat exchanger areas and stream data to any heat exchanger network. Using this model periodically for optimization, the operating conditions

Skogestad, Sigurd

367

On-line assessment performance of high pressure natural gas filter  

NASA Astrophysics Data System (ADS)

In this paper, an on-line high pressure natural gas pipeline particulate analyzer was employed to determine the performance of two filters in two domestic natural gas transport stations. The particle size distribution and mass concentration for inlets and outlets of the two filters were obtained. The filtration efficiencies and cumulative efficiencies for them were also derived.

Xu, Qiaoqi; Ji, Zhongli; Chen, Honghai; Xiong, Zhiyi

2013-07-01

368

On-Line Grammaticality Judgments in French Children and Adults: A Crosslinguistic Perspective  

ERIC Educational Resources Information Center

This study examined the on-line processing of French sentences in a grammaticality judgment experiment. Three age groups of French children (mean age: 6;8, 8;6 and 10;10 years) and a group of adults were asked to detect grammatical violations as quickly as possible. Three factors were studied: the violation type: agreement violations (number and…

Kail, Michele

2004-01-01

369

On-Line Identification of Faults in Fault-Tolerant Imagers  

Microsoft Academic Search

Detection of defective pixels that develop on-line is a vital part of fault tolerant schemes for repairing imagers during operation. This paper presents a new algorithm for the identification of stuck low, stuck high, and partially stuck pixels in both regular and fault tolerant APS systems. The algorithm does not require specialized illuminations but instead operates on a sequence of

Glenn H. Chapman; Israel Koren; Zahava Koren; Jozsef Dudas; Cory Jung

2005-01-01

370

On-Line Identification of Faults in Fault-Tolerant Imagers Glenn H. Chapman1  

E-print Network

On-Line Identification of Faults in Fault-Tolerant Imagers Glenn H. Chapman1 , Israel Koren2 and uses statistical information extracted from each image to decide the state of each pixel. Unlike that include hot pixels, without a significant decline in performance. 1. Introduction Faults in digital

Chapman, Glenn H.

371

A PROTOTYPE FOR ON-LINE MONITORING AND CONTROL OF ENERGY PERFORMANCE FOR RENEWABLE ENERGY  

E-print Network

A PROTOTYPE FOR ON-LINE MONITORING AND CONTROL OF ENERGY PERFORMANCE FOR RENEWABLE ENERGY BUILDINGS@univ-perp.fr Keywords: Renewable energies, energy performance indicators, monitoring system, smart transducers, control. Control algorithms are tested in simulation to improve renewable energy consumption while reducing fossil

Paris-Sud XI, Université de

372

On-line video media for continuing professional development in dentistry  

Microsoft Academic Search

This project investigated the exploitation of on-line video media for the Continuing Professional Development (CPD) of dentists. More specifically it focused on the evolution of the video media from videoconferencing to simple and complex webcasting. The study aimed to establish models of best practice for the use of both videoconferencing and webcasting in the training of dentists. The three phases

Patricia A. Reynolds; Robin Mason

2002-01-01

373

Repeatability and reproducibility of characteristic features measured by laser Doppler vibrometry for on-line diagnostics  

NASA Astrophysics Data System (ADS)

It is analyzed the statistical dispersion of characteristic features measured by Laser Doppler Vibrometry (LDV) in on-line diagnostic applications, with reference to on-line detection of mechanical defects of washing machines. The paper presents two complementary approaches: a) experimental evaluation of repeatability of measured features according to the Guide to the Expression of Uncertainty in Measurement-GUM; b) Montecarlo simulation of uncertainty propagation across the on-line test station. Experiments consist in a test bench which simulates the vibration of a washing machine, by playing back on a shaker a real signal acquired on-line and taking repeated measurements, so that a statistical analysis is performed about dispersion of diagnostic features. The analysis is repeated by varying the scattering characteristics of the vibrating surface, so to evaluate the effect of signal quality. The Montecarlo approach consists in modeling the propagation of uncertainty across the various elements of the measurement chain, up to the computation of features. The influence of LDV, Data Acquisition device (DAQ) and processing software have been taken into account. Results allow to estimate Repeatability and Reproducibility (R&R) of a typical set of characteristic features used in industrial diagnostics and to discuss uncertainty of similar diagnostic procedures.

Agostinelli, G.; Paone, N.

2008-06-01

374

On-line Structure and Motion Estimation based on an Novel Parameterized Extended Kalman Filter  

E-print Network

On-line Structure and Motion Estimation based on an Novel Parameterized Extended Kalman Filter sequences. The proposed method is based on an extended Kalman filter and a novel parameterization. We assume. Then we apply an extended Kalman filter for estimation of both structure and motion. The performance

Lunds Universitet

375

IN VIVO MEASUREMENT OF PHENYLGLUCUCURONIDE IN RAINBOW TROUT BY ON-LINE INJECTION MICRODIALYSIS  

EPA Science Inventory

Phenylglucuronide (PG) was measured in vivo in arterial blood of rainbow trout using on-line injection microdialysis. A microdialysis probe was surgically implanted in the dorsal aorta of spinally-transected trout. The trout were dosed continuously with PG for 24 h using a ventra...

376

Request New Chemical Waste Routine FILL IN ON-LINE THEN PRINT AND  

E-print Network

can fill out the online form to request collection of your waste. The form is located on our websiteRequest New Chemical Waste Routine FILL IN ON-LINE THEN PRINT AND FAX TO: 206-685-2915 OTHERWISE at: http://www.ehs.washington.edu/forms/epo/routinepickup.php ENVIRONMENTAL HEALTH AND SAFETY USE

Wilcock, William

377

On-line gamma monitoring system for the {sup 238}Pu aqueous recovery process  

SciTech Connect

The Power Source Technology Group at Los Alamos National Laboratory (LANL) is implementing a full-scale recycle and purifying process for {sup 238}Pu oxide fuel from scrap and waste. This paper presents the design of an on-line gamma monitoring system for the {sup 238}Pu aqueous recovery and purification process at LANL.

Ramsey, K.B.; Pansoy-Hjelvik, M.E.

1999-07-01

378

Scheme for On-Line Monitoring System based on smart converter substation  

Microsoft Academic Search

The necessity and possibility of On-Line Monitoring System (OLMS) based on smart converter substation is urged with analysis of EHV DC power grid development and the application on digital substation technology under State Grid Corporation of China (SGCC). With comments on OLMS and its application in all operating converter substations under SGCC for the time being, a solution of OLMS

Haiyan Zhang; Yongyun Zhang; Zhongquan Li

2010-01-01

379

Teacher-Student Interaction and Learning in On-Line Theological Education. Part III: Methodological Approach  

ERIC Educational Resources Information Center

Many theological educators ask how on-line classes can provide students with the kind of personal teacher-student interaction that is needed in a healthy and holistic approach to preparation for ministry. A quantitative study was undertaken for the purposes of examining the relationships between three major types of teacher-student interaction…

Heinemann, Mark H.

2006-01-01

380

Last updated May 14, 2013 On-Line Travel Risk-Awareness  

E-print Network

Last updated May 14, 2013 On-Line Travel Risk-Awareness All SFU faculty, staff, and students who for an evacuation. Course 2: Traveller's Risks (25 min) When you travel abroad, the odds are in your favor that you travel internationally on behalf of SFU are expected to complete three short courses addressing a variety

381

On-Line Journal Tips and Refreshers Cash Receipt and Credit Card Journals  

E-print Network

On-Line Journal Tips and Refreshers Cash Receipt and Credit Card Journals Updated April 2009 Updated 04/30/2010 1 Cash Receipt and Credit Card Journals ­ Source Code 320 and 323 Purpose Cash Receipt more or once a week ­ whichever comes first. 2. Journals should be dated the date they are prepared

Yamamoto, Keith

382

ON-LINE MEASUREMENT OF NITROUS OXIDE FROM COMBUSTION SOURCES BY AUTOMATED GAS CHROMATOGRAPHY  

EPA Science Inventory

The paper discusses on-line measurement of nitrous oxide (N2O) from combustion sources by automated gas chromatography. ossil fuel combustion is suspected of contributing to measured increases in the ambient concentrations of N2O. haracterization of N2O emissions from fossil fuel...

383

The research on job shop on-line scheduling with random release-date  

Microsoft Academic Search

For the job shop on-line scheduling in which the release dates of jobs are stochastic distributed, the hybrid scheduling strategy that integrates the interval rolling mechanism with the key event-driven is introduced. The satisfactory solution can be obtained through iterative optimization by embedding the neighborhood search into the constraint satisfaction solving procedure. The simulation and computational results verified that the

Jing Yin; Baojiang Chen

2009-01-01

384

Transfer Admission Checklist ADMISSION PROGRAM APP DEADLINE NOTIFIED ON-LINE BY  

E-print Network

.wesleyan.edu/admission/interview Scheduled for Date:_____________________ International Students only : College Scholarship Service (CSSTransfer Admission Checklist ADMISSION PROGRAM APP DEADLINE NOTIFIED ON-LINE BY Spring Transfer November 1 December 15 Fall Transfer March 15 May 15 Required Application Materials Action Date or N

Devoto, Stephen H.

385

Electric Generators Profit\\/Costs On-Line Management and Control  

Microsoft Academic Search

A method for the on-line management and control of power plants (all types) described with a particular focus on the key role of vibrations arising from transient episodes (the starting and stopping, load rejection, overspeed, runaway, etc.) and steady state conditions (induced from compressible flow turbomachines such as turbines, compressors and hydraulic machinery for example pumps, turbines, reversible pump-turbines). Available

386

English Collocation Learning through Corpus Data: On-Line Concordance and Statistical Information  

ERIC Educational Resources Information Center

We developed an English Collocations On Demand system offering on-line corpus and concordance information to help Japanese researchers acquire a better command of English collocation patterns. The Life Science Dictionary Corpus consists of approximately 90,000,000 words collected from life science related research papers published in academic…

Ohtake, Hiroshi; Fujita, Nobuyuki; Kawamoto, Takeshi; Morren, Brian; Ugawa, Yoshihiro; Kaneko, Shuji

2012-01-01

387

A Phenomenological Study of Gifted Adolescents and Their Engagement with One On-Line Learning System  

ERIC Educational Resources Information Center

Little research exists on the nature of the interactions between gifted students and the use of technology. Furthermore, no research has investigated the phenomenon of gifted adolescents using one internet-based program, the Renzulli Learning System (RLS). Renzulli Learning is an on-line educational profile with a matching database that provides…

Swicord, Barbara

2010-01-01

388

On-line Hand-Eye Calibration Nicolas Andre , Radu Horaud, Bernard Espiau  

E-print Network

On-line Hand-Eye Calibration Nicolas Andre , Radu Horaud, Bernard Espiau INRIA Rh^one-Alpes GRAVIR.lastname@inrialpes.fr Abstract In this paper, we address the problem of hand-eye calibration of a robot mounted video camera-line hand-eye calibration method. This method allows to get rid of the calibration object required

Paris-Sud XI, Université de

389

Athapascan1: On-Line Building Data Flow Graph in a Parallel Language  

Microsoft Academic Search

In order to achieve practical efficient execution on a parallel architecture, a knowledge of the data dependencies related to the application appears as the key point for building an efficient schedule. By restricting accesses in shared memory, we show that such a data dependency graph can be computed on-line on a distributed architecture. The overhead introduced is bounded with respect

François Galilée; Jean-Louis Roch; Gerson G. H. Cavalheiro; Mathias Doreille

1998-01-01

390

Three Chinese Students’ Experiences of Taking On-line Courses in One American University  

E-print Network

. Three research questions guided the study: 1) How do Chinese students feel about taking an on-line course as compared with traditional face-to-face lecture? 2) How confident do Chinese students feel about their language competency when they participate...

Yang, Xinyuan

2012-10-19

391

La Promozione della salute on line: una rassegna delle risorse e dei metodi  

Microsoft Academic Search

Summary: The paper analyses the questions of resources available on line for the organisation and development of health promotion (hp), and the problem of hp methodologies involving the use of ICT (Information and Communication Technologies). Examining the distribution and content of the main sites in English and Italian treating hp, the paper underline the vitality of the international level and

Marco Ingrosso

392

On-Line Selection Of Distinguishing Elements For Focused Information Retrieval  

Microsoft Academic Search

The internet can be viewed as a database with a huge amount of information. Powerful search engines present to users web pages that contain useful information, ranked according to the relevance to a particular query, and the quality of the web pages. However, users may have different interests even for the same query. In this work, we develop an on-line

Kang Chen; Weimin Zheng; Hung Chim; Xiaotie Deng; Haodi Feng; Shanfeng Zhu

2001-01-01

393

On-line condition monitoring of power transformers: A case history  

Microsoft Academic Search

This paper describes how a hydrogen on-line monitor (Hydran®) accompanied with specialist help can assist Asset Managers\\/ Operational Managers make good decisions regarding critical plant and identify the warning signs of a potentially catastrophic failure in a large power transformers.

Alfonso de Pablo; Walter Ferguson; Anatoliy Mudryk; Dmytro Golovan

2011-01-01

394

On-Line Quizzing and Its Effect on Student Engagement and Academic Performance  

ERIC Educational Resources Information Center

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…

Urtel, Mark G.; Bahamonde, Rafael E.; Mikesky, Alan E.; Udry, Eileen M.; Vessely, Jeff S.

2006-01-01

395

Laser ultrasonic system for on-line steel tube gauging and process control  

Microsoft Academic Search

A laser ultrasonic system has been installed on a seamless tubing production line at The Timken Company and is being used to measure on-line the wall thickness of tubes during processing. The seamless process consists essentially in forcing a mandrel through a hot cylindrical billet in rotation and results in wall thickness variations that should be minimized and controlled to

Daniel Levesque; Marc Choquet; Christian Padioleau; Christian Neron; Christian Corbeil; Richard Talbot; Abdelhakim Bendada; Jean-Pierre Monchalin; Robert V. Kolarik II; Gerald V. Jeskey

2002-01-01

396

Designing On-Line Chinese Language Courses: New Roles for Educators  

ERIC Educational Resources Information Center

The purpose of this paper is threefold. Firstly, it will review the theories and practice of on-line learning and the need for new roles in the development of new media delivery systems. Secondly, the current status of university teachers will be analyzed within the context of the new roles. And thirdly, new roles for teachers and course designers…

Zheng, Tongtao

2005-01-01

397

Anal.Chem.1997, 69,3321-3328 On-Line Detection of Nonspecific Protein  

E-print Network

6@3 Anal.Chem.1997, 69,3321-3328 On-Line Detection of Nonspecific Protein Adsorption at Artificial,J. W.; Manin, $. J.;White,R M. Anal. Chem.1993, A5'940-%8' 987-996. Analytical Chemistry, Vol. 69, No

Prentiss, Mara

398

An On-Line Monitoring Method of the Exhaust Steam Dryness in Steam Turbine  

Microsoft Academic Search

With the development of information and computer technology, it is possible to monitor and analyze on-line features of large steam turbine-generator units. The energy consumption rate and the exhaust steam dryness are two important indices. Base on the analyses of those existed calculation methods for turbine varying condition, we give a sequential varying condition calculation that starts with steam extraction

Chun-Fa Zhang; Ning Zhao; Hui-Jie Wang; Ya-Mi Chen; Yi-Ran Yan

2007-01-01

399

New Student Cards On-line application form on www.southampton.ac.uk/idcard  

E-print Network

ID Cards New Student Cards On-line application form on www.southampton.ac.uk/idcard Free of charge New staff cards HR will provide a form with your contract. Please bring it to Student Services in B37 Student replacement for a lost, stolen or damaged ID card http

Molinari, Marc

400

Reducing BWR O and M costs through on-line performance monitoring  

SciTech Connect

Competition in the electric power industry has placed significant emphasis on reducing operating and maintenance (O and M) costs at nuclear facilities. Therefore, on-line performance monitoring to locate power losses for boiling water reactor (BWR) plants is creating tremendous interest. In addition, the ability to automate activities such as data collection, analysis, and reporting increases the efficiency of plant engineers and gives them more time to concentrate on solving plant efficiency problems. This capability is now available with a unique software product called GEBOPS. GE Nuclear Energy, in conjunction with Joint Venture partner Black and Veatch, has undertaken development of the General Electric/Black and Veatch On-line Performance System (GEBOPS), an on-line performance monitoring system for BWR plants. The experience and expertise of GE Nuclear Energy with BWR plants, coupled with the proven on-line monitoring software development experience and capability of Black and Veatch, provide the foundation for a unique product which addresses the needs of today`s BWR plants.

Jonas, T.; Gross, R.; Logback, F. [Black and Veatch, Kansas City, MO (United States); Josyula, R. [General Electric Nuclear Energy, San Jose, CA (United States)

1995-12-31

401

Communicating Breast Cancer On-Line: Support and Empowerment on the Internet  

Microsoft Academic Search

Using participant-observation and discourse analysis, this study explores the communication occurring on the Breast Cancer List, an on-line discussion group which continues to grow in membership and activity. Issues discussed include the evolution of the List, who participates, what topics are discussed. Three major dimensions are identified: exchange of information, social support, and personal empowerment Social support via computer is

Barbara F. Sharf

1997-01-01

402

A layered framework for evaluating on-line collaborative learning interactions  

Microsoft Academic Search

Evaluating on-line collaborative learning interactions is a complex task due to the variety of elements and factors that take place and intervene in the way a group of students comes together to collaborate in order to achieve a learning goal. The aim of this paper is to provide a better understanding of group interaction and determine how to best support

Thanasis Daradoumis; Alejandra Martínez-monés; Fatos Xhafa

2006-01-01

403

NAVE BAYSIAN CLASSIFIER FOR ON-LINE REMAINING USEFUL LIFE PREDICTION OF DEGRADING BEARINGS  

E-print Network

NAÏVE BAYSIAN CLASSIFIER FOR ON-LINE REMAINING USEFUL LIFE PREDICTION OF DEGRADING BEARINGS.zio@polimi.it In this paper, the estimation of the Residual Useful Life (RUL) of degraded thrust ball bearings is made on new information collected by sensors located on the degrading bearing, and is suitable for an on

Paris-Sud XI, Université de

404

In Search of On-Line Locality Effects in Sentence Comprehension  

ERIC Educational Resources Information Center

Many comprehension theories assert that increasing the distance between elements participating in a linguistic relation (e.g., a verb and a noun phrase argument) increases the difficulty of establishing that relation during on-line comprehension. Such "locality effects" are expected to increase reading times and are thought to reveal properties…

Bartek, Brian; Lewis, Richard L.; Vasishth, Shravan; Smith, Mason R.

2011-01-01

405

Sketch Guided Sampling --Using On-Line Estimates of Flow Size for Adaptive Data Collection  

E-print Network

1 Sketch Guided Sampling -- Using On-Line Estimates of Flow Size for Adaptive Data Collection a decreasing sampling function ¢ of the size of the flow the packet belongs to. This way our scheme is able on real-world Internet traffic traces shows that our sampling theory based the approximate flow size

Vigoda, Eric

406

An Argument Structure Abstraction for Bayesian Belief Networks: Just Outcomes in On-line Dispute Resolution  

Microsoft Academic Search

There are many dierent approaches for settling dis- putes on-line, such as simple email systems, fixed bid systems and intelligent systems. However, to date there have been no attempts to integrate decision sup- port methods into the dispute resolution process for the purpose of supporting outcomes that are consis- tent with judicial reasoning. This paper describes how a model of

Nial Muecke; Andrew Stranieri

2007-01-01

407

Taking the Epistemic Step: Toward a Model of On-Line Access to Conversational Implicatures  

ERIC Educational Resources Information Center

There is a growing body of evidence showing that conversational implicatures are rapidly accessed in incremental utterance interpretation. To date, studies showing incremental access have focussed on implicatures related to linguistic triggers, such as "some" and "or". We discuss three kinds of on-line model that can account for this data. A model…

Breheny, Richard; Ferguson, Heather J.; Katsos, Napoleon

2013-01-01

408

On-Line Journal Tips and Refreshers Capital and Operating Leases  

E-print Network

On-Line Journal Tips and Refreshers Capital and Operating Leases Updated April 2010 Capital and Operating Leases-Day to Day Guidance The recording and tracking of Capital and Operating Leases is somewhat through the entire behind the scenes analysis of how to record leases, but rather provide guidance

Yamamoto, Keith

409

Low-cost electronic microwave calibration for rapid on-line moisture sensing of seedcotton  

Technology Transfer Automated Retrieval System (TEKTRAN)

In order to improve rapid on-line moisture sensing of seedcotton in cotton gins, a means by which to establish a reliable wide-band electronic calibration is critically needed. This calibration is needed to center the circuit due to changes in the internal signal delays and attenuations caused by te...

410

On the need for on-line learning in brain-computer interfaces  

Microsoft Academic Search

We motivate the need for on-line learning in brain-computer interfaces (BCI) and illustrate its benefits with the simplest method, namely fixed learning rates. However, the use of this method is supported by the risk of hampering the user to acquire suitable control of the BCI if the embedded classifier changes too rapidly. We report the results with 3 beginner subjects

Jdel. R. Millan

2004-01-01

411

An Evaluation of On-Line, Interactive Tutorials Designed to Teach Practice Concepts  

ERIC Educational Resources Information Center

This paper presents an evaluation of two on-line-based programs designed to teach practice skills. One program teaches crisis intervention and the other teaches suicide assessment. The evaluation of the use of these programs compares outcomes for two groups of students, one using the interactive program outside a class context and the other using…

Seabury, Brett A.

2005-01-01

412

On-line flow injection monitoring of ammonia in industrial liquid effluents  

Microsoft Academic Search

A flow-injection method was applied to on-line analysis for ammonia in industrial liquid effluents. The method utilised the diffusion of gaseous ammonia from an alkaline sample stream, through a microporous membrane, into a bromothymol blue indicator stream, with the resulting colour change measured photometrically using a red LED. Following initial development work, the method was adapted to an automated, portable

Kevin N. Andrew; Paul J. Worsfold; Michael Comber

1995-01-01

413

A Low-Maintenance Approach to Improving Retention: Short On-Line Tutorials in Elementary Statistics  

ERIC Educational Resources Information Center

The struggle to get weak students to use learning support services plagues virtually all retention programs (Friedlander, 1980; Hodges, 2001; Karabenick & Knapp, 1988; Moore & LeDee, 2006; Simpson, Hynd, Nist, & Burrell, 1997; Webster & Dee, 1998). This study presents a cost-effective form of supplemental instruction (SI), in the form of on-line…

Sargent, Carol Springer; Borthick, A. Faye; Lederberg, Amy R.; Haardorfer, Regine

2013-01-01

414

Syntax Encodes Information Structure: Evidence from On-Line Reading Comprehension  

ERIC Educational Resources Information Center

Although sentences are thought to be generally easier to process when given information precedes new information, closer examination reveals that these preferences only manifest within some syntactic structures. Here, we examine the consequences of the relative ordering of given and new information ("information structure") for the on-line…

Brown, Meredith; Savova, Virginia; Gibson, Edward

2012-01-01

415

THE ONSITE ON-LINE CALCULATORS AND TRAINING FOR SUBSURFACE CONTAMINANT TRANSPORT SITE ASSESSMENT  

EPA Science Inventory

EPA has developed a suite of on-line calculators called "OnSite" for assessing transport of environmental contaminants in the subsurface. The purpose of these calculators is to provide methods and data for common calculations used in assessing impacts from subsurface contaminatio...

416

The design of on-line item bank system based on cloud computing platform GAE  

Microsoft Academic Search

With the rapid development of network, computer network has entered the era of cloud computing, cloud computing has become a research hot area between major IT companies. Google App Engine. Google App Engine (GAE) is a cloud computing platform launched in 2009 by google; it is an engine for Internet application service. Currently on-line item bank system has been an

Jing Dong; Jun Han; Jing Liu; Huibin Yin

2011-01-01

417

A Client/Server Framework for On-line Building Code Charles S. Han1  

E-print Network

to develop an effective system to analyze a design for code-compliance. Key Words automation, building codesA Client/Server Framework for On-line Building Code Checking Charles S. Han1 , John C. Kunz2-4020 Abstract This paper outlines an integrated client/server framework for an automated code- checking system

Stanford University

418

Sketcha: A Captcha Based on Line Drawings of 3D Models Steven A. Ross  

E-print Network

Sketcha: A Captcha Based on Line Drawings of 3D Models Steven A. Ross Princeton University@cs.princeton.edu ABSTRACT This paper introduces a captcha based on upright orienta- tion of line drawings rendered from 3D, affording many different drawings from a single 3D model. The captcha presents the user with a set of images

419

MCMAC-CVT: a novel on-line associative memory based CVT transmission control system  

Microsoft Academic Search

This paper describes a novel application of an associative memory called the Modified Cerebellar Articulation Controller (MCMAC) (Int. J. Artif. Intell. Engng, 10 (1996) 135) in a continuous variable transmission (CVT) control system. It allows the on-line tuning of the associative memory and produces an effective gain-schedule for the automatic selection of the CVT gear ratio. Various control algorithms are

Kai Keng Ang; Hiok Chai Quek; Abdul Wahab

2002-01-01

420

An on-line scheduling policy for IRIS real-time composite tasks  

Microsoft Academic Search

In a new class of real-time tasks, called increasing reward with increasing service tasks (IRIS), the value of a task's computation increases as a function of the amount of execution time it has been able to accrue before its deadline expires. A composite task is a set of dependent component tasks. This paper presents an on-line scheduling policy for IRIS

Hasan Çam

2000-01-01

421

Multicolor on-line degree Ramsey numbers of trees William B. Kinnersley  

E-print Network

, . . . , Gs) when each Gi is a double-star. When each Gi is a star, we determine °R(G1, . . . , Gs) exactly. 1] determined the exact 2-color on-line degree Ramsey numbers for paths, stars, and double-stars (trees

West, Douglas B.

422

ON-LINE ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY FOR MERCURY ANALYSIS IN OIL SHALE GASES  

EPA Science Inventory

This publication describes the development and initial testing of instrumentation for continuous on-line analytical measurement of mercury concentrations in complex gas streams or in ambient air, in the presence of smoke, organic vapors, and oil mist from oil shale processing pla...

423

A new approach to on-line monitoring of extended phosphate programs  

SciTech Connect

Extended phosphate cooling water programs are traditionally controlled and monitored through the use of conventional off-line reagent tests. A new sensor has been developed which has the ability to determine polymer dispersant concentrations in an on-line mode. This paper will discuss the principles behind these measurements and their benefit to the control and recovery from upsets of extended phosphate programs.

Richardson, J.; Tippett, R.J.A.; Kuhn, V.R. [Grace Dearborn, Lake Zurich, IL (United States); Hartwick, D.; Ferguson, L. [Grace Dearborn, Mississauga, Ontario (Canada)

1994-12-31

424

A NEW ON-LINE DETECTING APPARATUS OF THE RESIDUAL CHLORINE IN DISINFECTANT  

E-print Network

A NEW ON-LINE DETECTING APPARATUS OF THE RESIDUAL CHLORINE IN DISINFECTANT FOR FRESH-CUT VEGETABLES of residual chlorine is 0~300ppm. Key words: e-government, knowledge management, frameworks, e-governance 1 is chlorine molecule, hypochlorous acid or calcium hypochlorite. Chloric disinfectant hydrolysis in water

425

Protecting on-line casinos against fraudulent player drop-out Joaquin Garcia1  

E-print Network

. If a player's gamble is aborted, the rest of players cannot continue playing. This behavior can be used-line gambling frauds. 1 Introduction We shall use the term "on-line gambling" to refer to gam- bling services-line gambling has attracted a high number of players and revenues during the last years, probably due to its

Garcia-Alfaro, Joaquin

426

Machine-Learning for Big Data: Sampling and Distributed On-Line Algorithms  

E-print Network

Machine-Learning for Big Data: Sampling and Distributed On-Line Algorithms Stéphan Clémençon LTCI variance control: rate faster than n 1/2 3 Convex risk minimization 4 Oracle inequalities #12;Big Data? Big phones, internet, embedded systems, social networks, . . .) · to store and manage Big (and Complex) Data

Combettes, Patrick Louis

427

Quick Guide for Submitting a Vendor Add Request On-Line  

E-print Network

Quick Guide for Submitting a Vendor Add Request On-Line · Log into Oracle · Click on "Vendor Request" responsibility · Conduct a Vendor Search to ensure the vendor does not already exist · Click on "Request New Vendor" · Fill in vendor information and ask the vendor to complete any required forms (W9

428

Quick Guide for Submitting a Vendor Site Add Request On-Line  

E-print Network

Quick Guide for Submitting a Vendor Site Add Request On-Line · Log into Oracle · Click on "Vendor Request" responsibility · Conduct a Vendor Search to find the vendor in the database · Click on "Sites you want her/him to know about this vendor site add request. For Post docs ­ enter Lab/Group Name, PI

429

Wetlands Research Program Technical Report Y-87-1 (on-line edition) Corps of Engineers  

E-print Network

Wetlands Research Program Technical Report Y-87-1 (on-line edition) Corps of Engineers Wetlands used as part of the number designating technical reports of research published under the Wetlands;Wetlands Research Program Technical Report Y-87-1 January 1987 Corps of Engineers Wetlands Delineation

US Army Corps of Engineers

430

Scientific writing: a randomized controlled trial comparing standard and on-line instruction  

PubMed Central

Background Writing plays a central role in the communication of scientific ideas and is therefore a key aspect in researcher education, ultimately determining the success and long-term sustainability of their careers. Despite the growing popularity of e-learning, we are not aware of any existing study comparing on-line vs. traditional classroom-based methods for teaching scientific writing. Methods Forty eight participants from a medical, nursing and physiotherapy background from US and Brazil were randomly assigned to two groups (n = 24 per group): An on-line writing workshop group (on-line group), in which participants used virtual communication, google docs and standard writing templates, and a standard writing guidance training (standard group) where participants received standard instruction without the aid of virtual communication and writing templates. Two outcomes, manuscript quality was assessed using the scores obtained in Six subgroup analysis scale as the primary outcome measure, and satisfaction scores with Likert scale were evaluated. To control for observer variability, inter-observer reliability was assessed using Fleiss's kappa. A post-hoc analysis comparing rates of communication between mentors and participants was performed. Nonparametric tests were used to assess intervention efficacy. Results Excellent inter-observer reliability among three reviewers was found, with an Intraclass Correlation Coefficient (ICC) agreement = 0.931882 and ICC consistency = 0.932485. On-line group had better overall manuscript quality (p = 0.0017, SSQSavg score 75.3 ± 14.21, ranging from 37 to 94) compared to the standard group (47.27 ± 14.64, ranging from 20 to 72). Participant satisfaction was higher in the on-line group (4.3 ± 0.73) compared to the standard group (3.09 ± 1.11) (p = 0.001). The standard group also had fewer communication events compared to the on-line group (0.91 ± 0.81 vs. 2.05 ± 1.23; p = 0.0219). Conclusion Our protocol for on-line scientific writing instruction is better than standard face-to-face instruction in terms of writing quality and student satisfaction. Future studies should evaluate the protocol efficacy in larger longitudinal cohorts involving participants from different languages. PMID:19473511

Phadtare, Amruta; Bahmani, Anu; Shah, Anand; Pietrobon, Ricardo

2009-01-01

431

Problem-based learning in an on-line biotechnology course  

NASA Astrophysics Data System (ADS)

Problem-based learning (PBL) is a pedagogical tool that uses a "real world" problem or situation as a context for learning. PBL encourages student development of critical thinking skills, a high professional competency, problem-solving ability, knowledge acquisition, the ability to work productively as a team member and make decisions in unfamiliar situations, and the acquisition of skills that support self-directed life-long learning, metacognition, and adaptation to change. However, little research has focused on the use of PBL in on-line "virtual" classes. We conducted two studies exploring the use of PBL in an on-line biotechnology course. In the first study, ethical, legal, social, and human issues were used as a motivation for learning about DNA testing technologies, applications, and bioethical issues. In the second study, we combined PBL pedagogy with a rich multimedia environment of streaming video interviews, physical artifacts, and extensive links to articles and databases to create a multidimensional immersive PBL environment called "Robert's World". In "Robert's World", a man is determining whether to undergo a pre-symptomatic DNA test for an untreatable, incurable, fatal genetic disease for which he has a family history. In both studies, design and implementation issues of the on-line PBL environment are discussed, as are differences between on-line PBL and face-to-face PBL. Both studies provide evidence to suggest that PBL stimulates higher-order learning in students. However, in both studies, student performance on an exam testing acquisition of lower-order factual learning was lower for PBL students than for students who learned the same material through a traditional lecture-based approach. Possible reasons for this lower level of performance are explored. Student feedback expressed engagement with the issues and material covered, with reservations about some aspects of the PBL format, such as the lack of flexibility provided in cooperative learning. We conclude that on-line PBL is a powerful tool in helping to develop higher-order learning in students. The reasons for the decrease in student understanding of factual information are unclear. However, there are certain circumstances unique to on-line classes to keep in mind when implementing on-line PBL. These are summarized in concluding recommendations.

Cheaney, James Daniel

432

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

433

Biomass gasification with steam in fluidized bed: Effectiveness of CaO, MgO, and CaO-MgO for hot raw gas cleaning  

Microsoft Academic Search

The upgrading of the raw hot gas from a bubbling fluidized bed biomass gasifier is studied using cheap calcined minerals or rocks downstream from the gasifier. Biomass gasification is made with steam (not air) at 750--780 C and about 0.5--1.0 kg of biomass\\/h. Calcined solids used are dolomite (MgO-CaO), pure calcite (CaO), and pure magnesite (MgO). Variables studied have been

Jesús Delgado; María P. Aznar; José Corella

1997-01-01

434

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

435

On-line and off-line data assimilation in palaeoclimatology: a case study  

NASA Astrophysics Data System (ADS)

Different ensemble-based data assimilation (DA) approaches for palaeoclimate reconstructions have been recently undertaken, but no systematic comparison among them has been attempted. We compare an off-line and an on-line ensemble-based method, with the testing period being the 17th century, which led into the Maunder Minimum. We use a low-resolution version of Max Planck Institute for Meteorology Earth System Model (MPI-ESM) to assimilate the Past Global Changes (PAGES) 2k continental temperature reconstructions. In the off-line approach, the ensemble for the entire simulation period is generated first and then the ensemble is used in combination with the empirical information to produce the analysis. In contrast, in the on-line approach, the ensembles are generated sequentially for sub-periods based on the analysis of previous sub-periods. Both schemes perform better than the simulations without DA. The on-line method would be expected to perform better if the assimilation led to states of the slow components of the climate system that are close to reality and the system had sufficient memory to propagate this information forward in time. In our comparison, which is based on analysing correlations and differences between the analysis and the proxy-based reconstructions, we find similar skill for both methods on the continental and hemispheric scales. This indicates either a lack of control of the slow components in our setup or a lack of skill in the information propagation on decadal timescales. Additional experiments are however needed to check whether the conclusions reached in this particular setup are valid in other cases. Although the performance of the two schemes is similar and the on-line method is more difficult to implement, the temporal consistency of the analysis in the on-line method makes it in general preferable.

Matsikaris, A.; Widmann, M.; Jungclaus, J.

2015-01-01

436

Geological control of canopy structure and function in Panamanian forests as identified by CAO-AToMS  

NASA Astrophysics Data System (ADS)

Geological formations and their edaphic properties are known to control plant species composition in tropical forests. It has been speculated that these edaphic and compositional patterns might also be translated into functional patterns, but this has been difficult to test due to a lack of broad-scale but detailed canopy structural and functional data. Here we use the Carnegie Airborne Observatory (CAO) Airborne Taxonomic Mapping System (AToMS), which combines a 480-band visible-to-shortwave imaging spectrometer (VSWIR) with dual waveform LiDAR, to generate ultra-high resolution data on geomorphology, canopy structure, and canopy chemistry for forests in the vicinity of the Panama Canal. Using these remotely-sensed data, in conjunction with field data on soils and plant species composition, we demonstrate that geological formations regulate forest structure and chemistry in these forests via changes in soils and plant species composition. These chemical properties, moreover, correspond to canopy functional properties including photosynthetic investment and anti-herbivore defenses. Together, our findings indicate that forest canopy structure and function in these forests are an expression their geological history, over which variations due to contemporary variables such as climate are overlaid.

Higgins, M.; Asner, G. P.; Martin, R. E.; Knapp, D. E.

2012-12-01

437

Dielectric properties of (CuO, CaO2, and BaO)y/CuTl-1223 composites  

NASA Astrophysics Data System (ADS)

We synthesized (CuO, CaO2, and BaO)y/Cu0.5Tl0.5Ba2Ca2Cu3O10-? (y = 0, 5%, 10%, 15%) composites by solid-state reaction and characterized them by x-ray diffraction, scanning electron microscopy, dc-resistivity, and Fourier transform infrared spectroscopy. Frequency and temperature dependent dielectric properties, such as real and imaginary parts of the dielectric constant, dielectric loss, and ac-conductivity of these composites were studied by capacitance and conductance measurements as a function of frequency (10 kHz to 10 MHz) and temperature (78 to 300 K). X-ray diffraction analysis reveals that the characteristic behavior of the superconductor phase and the structure of Cu0.5Tl0.5Ba2Ca2Cu3O10-? are nearly undisturbed by doping with nanoparticles. Scanning electron microscopy images show the improvement in the intergranular linking between the superconducting grains occurring with increasing nanoparticle concentration. Microcracks are healed up with these nanoparticles, and superconducting volume fraction is also increased. Dielectric properties of these composites strongly depend on the frequency and temperature. Zero resistivity critical temperature and dielectric properties show opposite trends with the addition of nanoparticles to the Cu0.5Tl0.5Ba2Ca2Cu3O10-? superconductor matrix.

Mumtaz, M.; Kamran, M.; Nadeem, K.; Jabbar, Abdul; Khan, Nawazish A.; Saleem, Abida; Tajammul Hussain, S.; Kamran, M.

2013-07-01

438

From insulator to electride: a theoretical model of nanoporous oxide 12CaO.7Al2O3.  

PubMed

Recently, a novel inorganic electride stable at room temperatures has been obtained by reducing a complex nanoporous oxide 12CaO.7Al2O3 (C12A7) in a Ca atmosphere (Matsuishi, S.; Toda, Y.; Miyakawa, M.; Hayashi, K.; Kamiya, T.; Hirano, M.; Tanaka, I.; Hosono, H. Science 2003, 301, 626). In this system, up to 2.3 x 1021/cm3 electrons can be accommodated in a three-dimensional network of cages formed by a positively charged oxide framework. We demonstrate theoretically that at all concentrations, ne, the electrons are neither associated with specific atoms nor fully delocalized. At low ne, the electrons are isolated from each other and resemble the color centers in insulating materials. They are well localized in some of the lattice cages and yield strong inhomogeneous lattice distortions that provide polaron-type cage-to-cage electron hopping. As ne increases, the electrons form a denser electron gas and become more evenly spread over all available lattice cages. At sufficiently high ne, the system becomes metallic but still retains partially localized character of the conducting electrons. We describe the nature of the electronic states at the Fermi level and predict the changes in the optical and magnetic properties of this system as a function of ne. PMID:17243831

Sushko, Peter V; Shluger, Alexander L; Hirano, Masahiro; Hosono, Hideo

2007-01-31

439

The mechanical properties and bioactivity of poly(methyl methacrylate)/SiO(2)-CaO nanocomposite.  

PubMed

The mechanical properties and bioactivity of poly(methyl methacrylate)/SiO(2)-CaO nanocomposite were investigated using dimethyldiethoxysilane (DMDES) and tetraethoxysilane (TEOS), which could produce two and four siloxane linkages, respectively, after a sol-gel reaction. Methyl methacrylate was co-polymerized with 3-(trimethoxysilyl)propyl methacrylate and then co-condensed with DMDES (specimen D) and TEOS (specimen T), respectively, with calcium nitrate tetrahydrate under acidic conditions. The fracture toughness of specimen D was much improved compared to that of specimen T, whereas its fracture strength, hardness, and apatite-forming ability in simulated body fluid (SBF) were slightly decreased. The improved fracture toughness of specimen D without losing apatite-forming ability was explained by the decrease of siloxane linkage numbers and the introduction of alkyl groups in silica structure because covalently bonded siloxane linkages produce hard and brittle fracture behavior in the nanocomposite while the alkyl groups help to make the silica as linear chain structure. The practical implication of these results is that this new nanocomposite can be applied to the filler materials for bone cement and dental composite resin because of its good bioactivity and improved mechanical properties. PMID:19304322

Lee, Kyu-Hyeon; Rhee, Sang-Hoon

2009-07-01

440

Cl 2 adsorption on supported alkali metals and on the MgO and CaO (001) supports: A DFT study  

NASA Astrophysics Data System (ADS)

The adsorption properties of Cl 2 molecules adsorbed on Li and Na atoms supported on various sites of MgO and CaO (100) surfaces have been examined at the DFT/B3LYP level of theory using the embedded cluster model. By comparison, the adsorption on the clean surfaces of the support has been investigated. Our calculations predict weakening of the Cl 2 bond due to the presence of the alkali metals, reflected by an elongation of the Cl 2 bond by 0.64 Å. Although the regular and defective sites are stronger binding sites in CaO (001) than in MgO (001), the interaction energy decreases as the atomic number of alkali atoms (Li and Na) increases. Metal atoms bind more strongly on the defect sites. The MgO and CaO (001) surfaces not only serve as the supports of Li and Na atoms but also participate in the interaction with Cl 2 molecule. Charge transfer takes place from the oxide surface to the adsorbed metal.

Abdel Aal, S.; Abdel Halim, W. S.; Shalabi, A. S.

2008-12-01

441

Target assembly  

DOEpatents

A target for a proton beam which is capable of generating neutrons for absorption in a breeding blanket includes a plurality of solid pins formed of a neutron emissive target material disposed parallel to the path of the beam and which are arranged axially in a plurality of layers so that pins in each layer are offset with respect to pins in all other layers, enough layers being used so that each proton in the beam will strike at least one pin with means being provided to cool the pins. For a 300 mA, 1 GeV beam (300 MW), stainless steel pins, 12 inches long and 0.23 inches in diameter are arranged in triangular array in six layers with one sixth of the pins in each layer, the number of pins being such that the entire cross sectional area of the beam is covered by the pins with minimum overlap of pins.

Lewis, Richard A. (Falls Church, VA)

1980-01-01

442

On Target  

NSDL National Science Digital Library

In this design challenge activity, learners modify a cup so it can carry a marble down a zip line and also drop it onto a target. Learners are encouraged to brainstorm answers to design questions, build a prototype using simple materials, and test, evaluate, and redesign their structure. The activity guide includes troubleshooting tips. The related Leader's Notes guide contains information on how to connect this to NASA and aerospace engineering.

Wgbh

2010-01-01

443

On-line gas chromatographic analysis of higher alcohol synthesis products from syngas.  

PubMed

An on-line gas chromatographic (GC) system has been developed for rapid and accurate product analysis in catalytic conversion of syngas (a mixture of H? and CO) to alcohols, so called "higher alcohol synthesis (HAS)". Conversion of syngas to higher alcohols is an interesting second step in the route of converting coal, natural gas and possibly biomass to liquid alcohol fuel and chemicals. The presented GC system and method are developed for analysis of the products formed from syngas using alkali promoted MoS? catalysts, however it is not limited to these types of catalysts. During higher alcohol synthesis not only the wanted short alcohols (?C?-C?) are produced, but also a great number of other products in smaller or greater amounts, they are mainly short hydrocarbons (olefins, paraffins, branched, non-branched), aldehydes, esters and ketones as well as CO?, H?O. Trace amounts of sulfur-containing compounds can also be found in the product effluent when sulfur-containing catalysts are used and/or sulfur-containing syngas is feed. In the presented GC system, most of them can be separated and analyzed within 60 min without the use of cryogenic cooling. Previously, product analysis in "higher alcohol synthesis" has in most cases been carried out partly on-line and partly off-line, where the light gases (gases at room temp) are analyzed on-line and liquid products (liquid at room temp) are collected in a trap for later analysis off-line. This method suffers from many drawbacks compared to a complete on-line GC system. In this paper an on-line system using an Agilent 7890 gas chromatograph equipped with two flame ionization detectors (FID) and a thermal conductivity detector (TCD), together with an Agilent 6890 with sulfur chemiluminescence dual plasma detector (SCD) is presented. A two-dimensional GC system with Deans switch (heart-cut) and two capillary columns (HP-FFAP and HP-Al?O?) was used for analysis of the organic products on the FIDs. Light inorganic gases (H?, CO, CO?, N?) and methane were separated on packed columns and quantified with the TCD. The "sulfur GC" was optimized for on-line trace level sulfur analysis in hydrocarbon matrices and used to understand to which degree sulfur is released from the catalyst and incorporated into the liquid product, and if so in which form. The method provides excellent quantitative measurements with a carbon material balance near 99.5% (carbon in/carbon out) for individual measurement points. PMID:22687712

Andersson, Robert; Boutonnet, Magali; Järås, Sven

2012-07-20

444

Development and Characterization of Immobilized Cannabinoid Receptor (CB1/CB2) Open Tubular Column for On-line Screening  

PubMed Central

Cannabinoid Receptors, CB1 and CB2, are therapeutic targets in the treatment of anxiety, obesity, movement disorders, glaucoma and pain. We have developed an on-line screening method for CB1 and CB2 ligands, where cellular membrane fragments of a chronic myelogenous leukemia cell line, (KU-812), were immobilized onto the surface of an open tubular capillary to create a CB1/CB2-OT column. The binding activities of the immobilized CB1/CB2 receptors were established using frontal affinity chromatographic techniques. This is the first report that confirms the presence of functional CB1 and CB2 receptors on KU-812 cells. The data from this study confirm that the CB1/CB2-OT column can be used to determine the binding affinities (Ki values) for a single compound and to screen individual or a mixture of multiple compounds. The CB1/CB2-OT column was also used to screen a botanical matrix, Zanthoxylum clava-herculis, where preliminary results suggest the presence of a high affinity phytocannabinoid. PMID:21215722

Moaddel, R.; Rosenberg, A.; Spelman, K.; Frazier, J.; Frazier, C.; Nocerino, S.; Brizzi, A.; Mugnaini, C.; Wainer, I.W.

2011-01-01

445

Rivoflavin may interfere with on-line monitoring of secreted green fluorescence protein fusion proteins in Pichia pastoris  

PubMed Central

Background Together with the development of optical sensors, fluorometry is becoming an increasingly attractive tool for the monitoring of cultivation processes. In this context, the green fluorescence protein (GFP) has been proposed as a molecular reporter when fused to target proteins to study their subcellular localization or secretion behaviour. The present work evaluates the use of the GFP fusion partner for monitoring extracellular production of a Rhizopus oryzae lipase (ROL) in Pichia pastoris by means of 2D-fluorimetric techniques Results In this study, the GFP-ROL fusion protein was successfully produced as a secreted fusion form in P. pastoris batch cultivations. Furthermore, both the fusion enzyme and the fluorescent protein (GFP S65T mutant) retained their biological activity. However, when multiwavelength spectrofluorometry was used for extracellular fusion protein monitoring, riboflavin appeared as a major interfering component with GFP signal. Only when riboflavin was removed by ultrafiltration from cultivation supernatants, GFP fluorescence signal linearly correlated to lipase activity Conclusion P. pastoris appears to secrete/excrete significant amounts of riboflavin to the culture medium. When attempting to monitor extracellular protein production in P. pastoris using GFP fusions combined with multiwavelength spectrofluorimetric techniques, riboflavin may interfere with GFP fluorescence signal, thus limiting the application of some GFP variants for on-line extracellular recombinant protein quantification and monitoring purposes. PMID:17511861

Surribas, Anna; Resina, David; Ferrer, Pau; Valero, Francisco

2007-01-01

446

Evaluation of 3 Commercially Available, On-Line TOC Analyzers for Monitoring Recycled Water in Semiconductor Processing  

SciTech Connect

Rapid detection of excursions in the concentration of organic contaminants in water that is being recycled is crucial to the more widespread acceptance of rinse water recycling as a method of reducing water usage in semiconductor manufacturing. In 1995 SEMATECH'SS116 PTAB (Project Technical Advisory Board) arbitrarily targeted a response time of 30s as the goal for the on-line detection of TOC (Total Oxidizable Carbon) in water - a goal thought to simpliilj the design of water recycling systems (less volume required for water storage in the recycle loop) and lead to more widespread adoption of recycling of spent rinse waters by the US semiconductor industry. A subsequent evaluation of the TOC analyzers commercially available in early 1996 demonstrated that the fastest response times were on the order of three minutes ljllef. 1]. This paper updates the 1996 evaluation of commercially available TOC analyzers by assessing modified versions of two of the previously evaluated analyzers and also anew analyzer that became commercially available in 1997.

DeGenova, J.; Donovan, R.P.; Morrison, D.

1998-11-09

447

Studies of uranium carbide targets of a high density  

NASA Astrophysics Data System (ADS)

Production of Cs and Fr isotopes from uranium carbide targets of a high density has been investigated at IRIS (Investigation Radioactive Isotopes at Synchrocyclotron), Gatchina. The UC target material with a density of 12 g/cm 3 was prepared in a form of pellets. Two targets were tested on-line under the same temperature conditions: (a) a reference small target with a thickness of 4.5 g/cm 2; (b) a heavier (so called intermediate) target with a thickness of 91 g/cm 2. Yields and release efficiencies of nuclides with half-lives from some minutes to some milliseconds produced by 1 GeV protons in these targets are presented. It is remarkable that yields, even those of very short-lived isotopes such as 214Fr ( T1/2 = 5 ms) and 219Fr ( T1/2 = 20 ms), increase proportionally to the target thickness. A one month off-line heating test of the 91 g/cm 2 target at a temperature of 2000 °C has been carried out successfully. The yields and release efficiencies of Cs and Fr measured on-line before and after the heating test coincided within the limits of measurement errors, thereby demonstrating the conservation of the target unit parameters. Based on these very promising results, a heavier target with a mass about 0.7 kg is prepared presently at IRIS.

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

2008-10-01

448

Sequential Monte Carlo for maneuvering target tracking in clutter  

NASA Astrophysics Data System (ADS)

In this paper we consider the problem of tracking a maneuvering target in clutter. We apply an original on-line Monte Carlo filtering algorithm to perform optimal state estimation. Improved performance of the resulting algorithm over standard IMM/PDAF based filters is demonstrated.

Gordon, Neil J.; Doucet, Arnaud

1999-10-01

449

Accelerator target  

DOEpatents

A target includes a body having a depression in a front side for holding a sample for irradiation by a particle beam to produce a radioisotope. Cooling fins are disposed on a backside of the body opposite the depression. A foil is joined to the body front side to cover the depression and sample therein. A perforate grid is joined to the body atop the foil for supporting the foil and for transmitting the particle beam therethrough. A coolant is circulated over the fins to cool the body during the particle beam irradiation of the sample in the depression. 5 figs.

Schlyer, D.J.; Ferrieri, R.A.; Koehler, C.

1999-06-29

450

EDGAR On-line Database and the Paperwork Reduction Act Debate  

NSDL National Science Digital Library

For almost two years, as part of a research and development project, the non-profit Internet Multicasting Service has put the entire text of U.S. Patent and Securities and Exchange Commission (SEC) documents on-line via the EDGAR On-line database. Recently Internet Muliticasting announced the EDGAR research project would end on October 1, and a discussion ensued concerning the future availability of this information over the Internet free of charge. Current information on the status of the discussion, including background information on EDGAR and the Paperwork Reduction Act (which becomes law on October 1) is provided on an Internet Multicasting Web page. Comments from SEC Chairman Levitt and Congressman Markey are available, as are statistics on EDGAR's usage via the Internet and cost comparisons for the same information retrieved from commercial information providers.

1995-01-01

451

FBG stress-sensibilized monitor for railway switch pole on-line monitoring  

NASA Astrophysics Data System (ADS)

The fiber Bragg grating (FBG) sensing technology is used to dynamically monitor multiple parameters of railway switch machine poles, including time of movement, direction and quantity of loading and locking force, and states of loading resistance. This paper presents the design and implementation of a railway switch pole strain on-line monitoring system based on the FBG stress-sensibilized monitor for a Siemens S700K switch machine. The ring shape FBG strain gauge and stress-sensibilized methods significantly increased the monitoring sensitivity. Installing approaches adapted the harsh environment in the railway application. The monitoring results showed the high sensitivity and high reliability of this monitoring system. This application provides a long-term and on-line detecting method which could meet railway switch condition monitoring demands of more than 100,000 switch machines in the country.

Li, Weilai; Liu, Jie; Pan, Jianjun; Pang, Jin; Lu, Xiaoshan

2014-09-01

452

Modeling a multivariable reactor and on-line model predictive control.  

PubMed

A nonlinear first principle model is developed for a laboratory-scaled multivariable chemical reactor rig in this paper and the on-line model predictive control (MPC) is implemented to the rig. The reactor has three variables-temperature, pH, and dissolved oxygen with nonlinear dynamics-and is therefore used as a pilot system for the biochemical industry. A nonlinear discrete-time model is derived for each of the three output variables and their model parameters are estimated from the real data using an adaptive optimization method. The developed model is used in a nonlinear MPC scheme. An accurate multistep-ahead prediction is obtained for MPC, where the extended Kalman filter is used to estimate system unknown states. The on-line control is implemented and a satisfactory tracking performance is achieved. The MPC is compared with three decentralized PID controllers and the advantage of the nonlinear MPC over the PID is clearly shown. PMID:16294779

Yu, D W; Yu, D L

2005-10-01

453

Experience-Based and On-Line Categorization of Objects in Early Infancy  

PubMed Central

What processes do infants employ in categorizing? Infants might categorize on line as they encounter category-related entities; alternatively, infants might depend on prior experience with entities in formulating categories. These alternatives were tested in forty-four 5-month-olds. Infants who were familiarized in the laboratory with a category of never-before-seen objects subsequently treated novel objects of the same category as familiar -- they categorized on line -- just as did infants who were exposed to objects from the same category at home for 2 months leading to their laboratory assessment of object categorization. Infants with home experience also recognized novel category objects as familiar from the outset – that is, prior experience with category exemplars was brought to bear in laboratory tasks. PMID:20573111

Bornstein, Marc H.; Mash, Clay

2010-01-01

454

The development of an on-line ERM system for the research reactors in Korea  

NASA Astrophysics Data System (ADS)

A real-time on-line environmental radiation monitoring (ERM) system for the research reactor sites of Daejeon and Seoul is established. In the Daejeon site, a radio communication method with a radiofrequency of 468.8 MHz is used between the main computer and the six posts inside the Daejeon research reactor site. A general telephone communication method by a dial modem is applied between the main computer and a comparison point with one post outside the Daejeon research reactor site. In the Seoul site, a null modem communication method is employed between a sub-computer and the three posts inside the Seoul research reactor site, and a high-speed communication network such as ADSL is used between the sub-computer in the Seoul site and the main computer in the Daejeon site. Consequently, the real-time data from a total of 10 places is displayed on-line on a screen and it is statistically treated.

Kim, Hee Reyoung; Lee, Wanno; Kim, Eun Han; Choi, Geun Sik; Lee, Chang Woo

2007-08-01

455

On-Line Modal State Monitoring of Slowly Time-Varying Structures  

NASA Technical Reports Server (NTRS)

Monitoring the dynamic response of structures is often performed for a variety of reasons. These reasons include condition-based maintenance, health monitoring, performance improvements, and control. In many cases the data analysis that is performed is part of a repetitive decision-making process, and in these cases the development of effective on-line monitoring schemes help to speed the decision-making process and reduce the risk of erroneous decisions. This report investigates the use of spatial modal filters for tracking the dynamics of slowly time-varying linear structures. The report includes an overview of modal filter theory followed by an overview of several structural system identification methods. Included in this discussion and comparison are H-infinity, eigensystem realization, and several time-domain least squares approaches. Finally, a two-stage adaptive on-line monitoring scheme is developed and evaluated.

Johnson, Erik A.; Bergman, Lawrence A.; Voulgaris, Petros G.

1997-01-01

456

On-Line Tracking Controller for Brushless DC Motor Drives Using Artificial Neural Networks  

NASA Technical Reports Server (NTRS)

A real-time control architecture is developed for time-varying nonlinear brushless dc motors operating in a high performance drives environment. The developed control architecture possesses the capabilities of simultaneous on-line identification and control. The dynamics of the motor are modeled on-line and controlled using an artificial neural network, as the system runs. The control architecture combines the experience and dependability of adaptive tracking systems with potential and promise of the neural computing technology. The sensitivity of real-time controller to parametric changes that occur during training is investigated. Such changes are usually manifested by rapid changes in the load of the brushless motor drives. This sudden change in the external load is simulated for the sigmoidal and sinusoidal reference tracks. The ability of the neuro-controller to maintain reasonable tracking accuracy in the presence of external noise is also verified for a number of desired reference trajectories.

Rubaai, Ahmed

1996-01-01

457

Development of on-line monitoring device to detect the presence/absence of sodium vapor  

SciTech Connect

A process is being developed by the Sodium Waste Technology Program at ANL-W to remove metallic sodium from scrap and waste. The final step in the process is the removal of residual metallic sodium by evaporation at temperatures up to 482/sup 0/C (900/sup 0/F) and at pressures of about 10/sup -2/ torr (1.3 Pa). Efficient operation of this process requires that the operators have a method to indicate the completion of the evaporation. This end point would signify when the chamber and scrap and waste is free of metallic sodium. It was determined that a measure of the vacuum was not sufficiently sensitive, and a research effort was undertaken to select an on-line monitoring device. In this effort, three promising methods were reviewed. The use of quadrupole mass spectrometer was recommended and an on-line device was designed for use in a Sodium Process Demonstration (SPD) Plant.

Wolson, R.D.; McPheeters, C.C.; Kremesec, V.J.; Kolba, V.M.

1983-03-01

458

On-Line Method and Apparatus for Coordinated Mobility and Manipulation of Mobile Robots  

NASA Technical Reports Server (NTRS)

A simple and computationally efficient approach is disclosed for on-line coordinated control of mobile robots consisting of a manipulator arm mounted on a mobile base. The effect of base mobility on the end-effector manipulability index is discussed. The base mobility and arm manipulation degrees-of-freedom are treated equally as the joints of a kinematically redundant composite robot. The redundancy introduced by the mobile base is exploited to satisfy a set of user-defined additional tasks during the end-effector motion. A simple on-line control scheme is proposed which allows the user to assign weighting factors to individual degrees-of-mobility and degrees-of-manipulation, as well as to each task specification. The computational efficiency of the control algorithm makes it particularly suitable for real-time implementations. Four case studies are discussed in detail to demonstrate the application of the coordinated control scheme to various mobile robots.

Seraji, Homayoun (Inventor)

1996-01-01

459

Correction factors for on-line microprobe analysis of multielement alloy systems  

NASA Technical Reports Server (NTRS)

An on-line correction technique was developed for the conversion of electron probe X-ray intensities into concentrations of emitting elements. This technique consisted of off-line calculation and representation of binary interaction data which were read into an on-line minicomputer to calculate variable correction coefficients. These coefficients were used to correct the X-ray data without significantly increasing computer core requirements. The binary interaction data were obtained by running Colby's MAGIC 4 program in the reverse mode. The data for each binary interaction were represented by polynomial coefficients obtained by least-squares fitting a third-order polynomial. Polynomial coefficients were generated for most of the common binary interactions at different accelerating potentials and are included. Results are presented for the analyses of several alloy standards to demonstrate the applicability of this correction procedure.

Unnam, J.; Tenney, D. R.; Brewer, W. D.

1977-01-01

460

On-Line Measurement of Heat of Combustion of Gaseous Hydrocarbon Fuel Mixtures  

NASA Technical Reports Server (NTRS)

A method for the on-line measurement of the heat of combustion of gaseous hydrocarbon fuel mixtures has been developed and tested. The method involves combustion of a test gas with a measured quantity of air to achieve a preset concentration of oxygen in the combustion products. This method involves using a controller which maintains the fuel (gas) volumetric flow rate at a level consistent with the desired oxygen concentration in the combustion products. The heat of combustion is determined form a known correlation with the fuel flow rate. An on-line computer accesses the fuel flow data and displays the heat of combustion measurement at desired time intervals. This technique appears to be especially applicable for measuring heats of combustion of hydrocarbon mixtures of unknown composition such as natural gas.

Sprinkle, Danny R.; Chaturvedi, Sushil K.; Kheireddine, Ali

1996-01-01

461

Development of on-line monitoring systems for high temperature components in power plants.  

PubMed

To accurately detect deformation and extend the component life beyond the original design limits, structural safety monitoring techniques have attracted considerable attention in the power and process industries for decades. In this paper an on-line monitoring system for high temperature pipes in a power plant is developed. The extension-based sensing devices are amounted on straight pipes, T-Joints and elbows of a main steam pipeline. During on-site monitoring for more than two years, most of the sensors worked reliably and steadily. However, the direct strain gauge could not work for long periods because of the high temperature environment. Moreover, it is found that the installation and connection of the extensometers can have a significant influence on the measurement results. The on-line monitoring system has a good alarming function which is demonstrated by detecting a steam leakage of the header. PMID:24233026

Zhang, Hongcai; Jia, Jiuhong; Wang, Ning; Hu, Xiaoyin; Tu, Shan-Tung; Zhou, Shaoping; Wang, Zhengdong

2013-01-01

462

Development of On-Line Monitoring Systems for High Temperature Components in Power Plants  

PubMed Central

To accurately detect deformation and extend the component life beyond the original design limits, structural safety monitoring techniques have attracted considerable attention in the power and process industries for decades. In this paper an on-line monitoring system for high temperature pipes in a power plant is developed. The extension-based sensing devices are amounted on straight pipes, T-Joints and elbows of a main steam pipeline. During on-site monitoring for more than two years, most of the sensors worked reliably and steadily. However, the direct strain gauge could not work for long periods because of the high temperature environment. Moreover, it is found that the installation and connection of the extensometers can have a significant influence on the measurement results. The on-line monitoring system has a good alarming function which is demonstrated by detecting a steam leakage of the header. PMID:24233026

Zhang, Hongcai; Jia, Jiuhong; Wang, Ning; Hu, Xiaoyin; Tu, Shan-Tung; Zhou, Shaoping; Wang, Zhengdong

2013-01-01

463

Robust RLS Methods for On-line Estimation of Power System Electromechanical Modes  

SciTech Connect

This paper proposes a Robust Recursive Least Square (RRLS) algorithm for on-line identification of power system modes based on measurement data. The measurement data can either be ambient or ringdown. Also, the mode estimation is provided in real-time. The validity of the proposed RRLS algorithm is demon-strated with both simulation data from a 17-machine model and field measurement data from a Wide Area Measurement System (WAMS). Comparison with the conventional Recursive Least Square (RLS) and Least Means Square (LMS) algorithms shows that the proposed RRLS algorithm can identify the modes from the combined ringdown and ambient signals with outliers and missing data in real time without noticeable performance degra-dation. An adaptive detrend algorithm is also proposed to remove the signal trend based on the RRLS algorithm. It is shown that the algorithm can keep up with the measurement data flow and work on-line to provide real time mode estimation.

Zhou, Ning; Pierre, John W.; Trudnowski, Daniel; Guttromson, Ross T.

2007-08-01

464

On-Line "Chat Room" Tutorials—An Unusual Gender Bias in Computer Use  

NASA Astrophysics Data System (ADS)

Research into gender bias in attitudes, access, and effectiveness associated with computers has produced conflicting results, resulting in conflicting opinions as to whether a technological gender gap favoring male students exists. No previous study, however, has ever demonstrated a preference for female use of a particular computer application. This work describes gender differences in the use of on-line ("chat room") tutorials by non-traditional chemistry students enrolled in distance learning sections of a general chemistry course. Higher percentages of female students participated in the on-line tutorials and they participated with greater frequency than male students. Furthermore, the correlation between frequency of participation and course performance was higher among the female students. Various explanations for this unusual gender bias are offered, and the conclusion that the diversity of computer applications available today requires that research into gender bias refrain from viewing the computer as a single entity is supported.

Kimbrough, Doris R.

1999-09-01

465

A decision tree method for on-line steady state security assessment  

SciTech Connect

In this paper the application of an Inductive Inference (II) method to on-line Steady State Security Assessment of a power system is proposed. For each contingency a number of decision rules in the form of a Decision Tree (DT) is built off-line from a preclassified Learning Set (LS) consisting of operating points (OP) of the system. For the real time application of the method the DTs corresponding to the foreseen contingencies are searched on-line to provide optimal guidelines for preventive control of the system. The algorithm developed is applied to the steady state security assessment of a realistic model of the Hellenic Interconnected power system comprising 240 busbars, 270 branches, 57 transformers and 30 equivalent generators.

Hatziargyriou, N.D.; Contaxis, G.C.; Sideris, N.C. (National Technical Univ., Athens (Greece). Electrical Engineering Dept.)

1994-05-01

466

On-line low flow high-precision gas metering systems  

Microsoft Academic Search

The paper describes a high precision gas meter suitable for low rates of flow (< 5 cm3 min?1) which can be interfaced with data acquisition software for continuous on-line measurement. The meter used the highly sensitive pressure transducers currently available, operated with a very small back pressure, and had an accuracy around 0.5%. A frequency to voltage converter was developed

A. J. Guwy; D. L. Hawkes; F. R. Hawkes

1995-01-01

467

WWW-query: An on-line retrieval system for biological sequence banks  

Microsoft Academic Search

We have developed a World Wide Web (WWW) version of the sequence retrieval system Query: WWW-Query. This server allows to query nucleotide sequence banks in the EMBL\\/GenBank\\/DDBJ formats and protein sequence banks in the NBRF\\/PIR format. WWW-Query includes all the features of the on-line sequence browsers already available: possibility to build complex queries, integration of cross-references with different data banks,

G. Perrière; M. Gouy

1996-01-01

468

An On-Line UPS System With Power Factor Correction and Electric Isolation Using BIFRED Converter  

Microsoft Academic Search

This paper presents the design consideration and performance analysis of an on-line, low-cost, high performance, and single-phase uninterruptible power supply (UPS) system based on a boost integrated flyback rectifier\\/energy storage dc\\/dc (BIFRED) converter. The system consists of an isolated ac\\/dc BIFRED converter, a bidirectional dc\\/dc converter, and a dc\\/ac inverter. It provides input power factor correction, electric isolation of the

Adel Nasiri; Zhong Nie; Stoyan B. Bekiarov; Ali Emadi

2008-01-01

469

On-line fatigue–creep monitoring system for high-temperature components of power plants  

Microsoft Academic Search

A system has been developed for on-line monitoring of various aging effects, such as fatigue, creep and fatigue–creep interaction. This can take care of the fluctuations of the process fluid temperature, pressure and flow rate and the piping loads such as axial forces and bending moments. The system converts the plant transients to temperature\\/stress responses using the finite element method

N. K Mukhopadhyay; B. K Dutta; H. S Kushwaha

2001-01-01

470

Analytic redundancy for on-line fault diagnosis in a nuclear reactor  

Microsoft Academic Search

A computer-aided diagnostic technique has been applied to on-line signal validation in an operating nuclear reactor. To avoid installation of additional redundant sensors for the sole purpose of fault isolation, a real-time model of nuclear instrumentation and the thermal-hydraulic process in the primary coolant loop was developed and experimentally validated. The model provides analytically redundant information sufficient for isolation of

Asok Ray; Mukund Desai; John Deyst; Robert Geiger

1983-01-01

471

On-line monitoring of biogenic isoprene emissions using photoacoustic spectroscopy  

Microsoft Academic Search

.   Isoprene (C5H8) is one of the most important biogenic volatile organic compounds (VOCs) in the atmosphere. To calculate the impact of isoprene\\u000a on atmospheric processes models have been developed that describe the isoprene release from plants. Measurements of this release\\u000a require techniques for a fast, sensitive, on-line isoprene detection.\\u000a \\u000a Photoacoustic (PA) spectroscopy is applied here for the first time

H. Dahnke; J. Kahl; G. Schüler; W. Boland; W. Urban; F. Kühnemann

2000-01-01

472

Dijkstra's Algorithm On-Line: An Empirical Case Study from Public Railroad Transport  

Microsoft Academic Search

Traffic information systems are among the most prominent real-world applications of Dijkstra’s algorithm for shortest paths.\\u000a We consider the scenario of a central information server in the realm of public railroad transport on wide-area networks.\\u000a Such a system has to process a large number of on-line queries in real time. In practice, this problem is usually solved by\\u000a heuristical variations

Frank Schulz; Dorothea Wagner; Karsten Weihe

1999-01-01

473

Dijkstra's Algorithm On-Line: An Empirical Case Study from Public Railroad Transport  

Microsoft Academic Search

Traffic information systems are among the most prominent real-world applications of Dijkstra's algorithm for shortest paths. We consider the scenario of a central information server in the realm of public railroad transport on wide-area networks. Such a system has to process a large number of on-line queries for optimal travel connections in real time. In practice, this problem is usually

Frank Schulz; Dorothea Wagner; Karsten Weihe

2000-01-01

474

Developing an EEG-based on-line closed-loop lapse detection and mitigation system  

PubMed Central

In America, 60% of adults reported that they have driven a motor vehicle while feeling drowsy, and at least 15–20% of fatal car accidents are fatigue-related. This study translates previous laboratory-oriented neurophysiological research to design, develop, and test an On-line Closed-loop Lapse Detection and Mitigation (OCLDM) System featuring a mobile wireless dry-sensor EEG headgear and a cell-phone based real-time EEG processing platform. Eleven subjects participated in an event-related lane-keeping task, in which they were instructed to manipulate a randomly deviated, fixed-speed cruising car on a 4-lane highway. This was simulated in a 1st person view with an 8-screen and 8-projector immersive virtual-reality environment. When the subjects experienced lapses or failed to respond to events during the experiment, auditory warning was delivered to rectify the performance decrements. However, the arousing auditory signals were not always effective. The EEG spectra exhibited statistically significant differences between effective and ineffective arousing signals, suggesting that EEG spectra could be used as a countermeasure of the efficacy of arousing signals. In this on-line pilot study, the proposed OCLDM System was able to continuously detect EEG signatures of fatigue, deliver arousing warning to subjects suffering momentary cognitive lapses, and assess the efficacy of the warning in near real-time to rectify cognitive lapses. The on-line testing results of the OCLDM System validated the efficacy of the arousing signals in improving subjects' response times to the subsequent lane-departure events. This study may lead to a practical on-line lapse detection and mitigation system in real-world environments. PMID:25352773

Wang, Yu-Te; Huang, Kuan-Chih; Wei, Chun-Shu; Huang, Teng-Yi; Ko, Li-Wei; Lin, Chin-Teng; Cheng, Chung-Kuan; Jung, Tzyy-Ping

2014-01-01

475

Economical method of on-line data processing for an isotope-ratio mass spectrometer  

Microsoft Academic Search

An adaptation of a TI 59 programmable calculator to a home-made digital system, described earlier by the authors (see ibid., vol.13, p.346, March 1980), is described. Further valuable features of the system have been established: (i) automatic evaluation of delta values together with information about their precision and the sample pressure in the inlet system, (ii) on-line correction of biases

S. Halas; Z. Skorzynski

1981-01-01

476

Study of on-line measurement of traffic self-similarity  

Microsoft Academic Search

The research focuses on the analysis of university e-learning network traffic to work out and validate the methods that are\\u000a most suitable for robust analysis and on-line monitoring of self-similarity. Time series of network traffic analyzed are formed\\u000a by registering data packets in a node at different regimes of network traffic and different ways of sampling. The results\\u000a obtained have

Liudvikas Kaklauskas; Leonidas Sakalauskas

477

On-line applet-based optics course for undergraduate students  

NASA Astrophysics Data System (ADS)

We present an educational resource based in a virtual optical laboratory for undergraduate students. It consists in a web-based textbook with several applets to illustrate the theory and simplify the teaching tasks in the classroom. These programs can also be used as a method for self-learning in an on-line environment. Applets are written in Java language using the Java Network Launching Protocol (JNPL) for avoiding problems related with the use of specific browsers or Java interpreters versions.

Carnicer, Arturo; Bosch, Salvador; Ferre, Josep; Juvells, Ignacio P.; Labastida, Ignasi Juan I.; Martin-Badosa, Estela; de F. Moneo, J. R.; Pleguezuelos, Encarnacion; Tudela, Raul; Vallmitjana, Santiago

2003-11-01

478

On-line measurement of the straightness of seamless steel pipes using machine vision technique  

Microsoft Academic Search

In this paper, on-line and real-time laser visual alignment measurement technique is studied to measure the spatial straightness of large objects. The basic principle of the visual alignment measurement is detailed. The mathematics models of visual sensor, measurement system and their calibrations are presented. Based on the technique, an experiment system is developed and the straightness of a 1500mm long

R. S Lu; Y. F Li; Q Yu

2001-01-01

479

Fusion of HMM's Likelihood and Viterbi Path for On-line Signature Verification  

Microsoft Academic Search

\\u000a We describe a method fusing two complementary scores descended from a Hidden Markov Model (HMM) for on-line signature verification.\\u000a The signatures are acquired using a digitizer that captures pen-position, pen-pressure, and pen-inclination. A writer is considered\\u000a as being authentic when the arithmetic mean of two similarity scores obtained on an input signature is higher than a threshold.\\u000a The first score

Van-bao Ly; Sonia Garcia-salicetti; Bernadette Dorizzi

2004-01-01

480

Proton transfer reaction mass spectrometry: on-line trace gas analysis at the ppb level  

Microsoft Academic Search

A system for trace gas analysis using proton transfer reaction mass spectrometry (PTR-MS) has been developed which allows for on-line measurements of components with concentrations as low as 1 ppb. The method is based on reactions of H3O+ ions, which perform non-dissociative proton transfer to most of the common organic trace constituents but do not react with any of the

A. Hansel; A. Jordan; R. Holzinger; P. Prazeller; W. Vogel; W. Lindinger

1995-01-01

481

On-Line Monitoring of Microbial Volatile Metabolites by Proton Transfer Reaction-Mass Spectrometry  

Microsoft Academic Search

A method for analysis of volatile organic compounds (VOCs) from microbial cultures was established using proton transfer reaction-mass spectrometry (PTR-MS). A newly developed sampling system was coupled to a PTR-MS instrument to allow on-line monitoring of VOCs in the dynamic headspaces of microbial cultures. The novel PTR-MS method was evaluated for four reference organisms: Escherichia coli, Shigella flexneri, Salmonella enterica,

Michael Bunge; Nooshin Araghipour; Tomas Mikoviny; Jurgen Dunkl; Ralf Schnitzhofer; Armin Hansel; Franz Schinner; Armin Wisthaler; Rosa Margesin; Tilmann D. Mark

2008-01-01

482

On-line low- and medium-level measurements of the radon activity concentration  

Microsoft Academic Search

The on-line determination of low and medium radon activity concentrations within the range from 1 to 103Bqm?3 is not possible with the detectors available so far. A large-volume multiwire pulse ionization chamber with an optimized electrode structure has therefore been developed at the German radon reference chamber of the PTB. The position of the parallel electrode wires follows the shape

S. Röttger; A. Paul; A. Honig; Uwe Keyser

2001-01-01

483

MURAX: a robust linguistic approach for question answering using an on-line encyclopedia  

Microsoft Academic Search

Robust linguistic methods are applied to the task of answering closed-class questions using a corpus of natural language. The methods are illustrated in a broad domain: answering general-knowledge questions using an on-line encyclopedia.A closed-class question is a question stated in natural language, which assumes some definite answer typified by a noun phrase rather than a procedural answer. The methods hypothesize

Julian Kupiec

1993-01-01

484

On-line separation of refractory hafnium and tantalum isotopes at the ISOCELE separator  

E-print Network

By chemical evaporation technique, neutron deficient hafnium nuclei have been on-line separated at the ISOCELE facility, from the isobar rare-earth elements, in the metal-fluoride HfF/sub 3//sup +/ ion form. Half-lives of /sup 162-165/Hf have been measured. Similarly, tantalum has been selectively separated on the TaF/sub 4//sup +/ form. (4 refs) .

Liang, C F; Obert, J; Paris, P; Putaux, J C

1981-01-01

485

An On-Line Calibration Monitoring Technique Using Support Vector Regression and Principal Component Analysis  

Microsoft Academic Search

In a nuclear power plant (NPP), periodic sensor calibrations are required to assure sensors are operating correctly. However, only a few faulty sensors are found to be calibrated. For the safe operation of an NPP and the reduction of unnecessary calibration, on-line calibration monitoring is needed. In this study, principal component-based auto-associative support vector regression (AASVR) is proposed for the

In-yong Seo; Seong-jun Kim

2008-01-01

486

Incorporating on-line process data into a diagnostic knowledge-based system  

E-print Network

into a Diagnostic Knowledge-based System. (May 1994) Kai-Hsuan Lin, B. S. , University of California, Los Angeles Chair of Advisory Committea: Dr. Joseph G. Massey The objective of this research was to develop and implement an on-line gypsum... 52 63 66 CONCLUSIONS LITERATURE CITED 71 78 APPENDIX A APPENDIX B VITA 80 82 108 LIST Oi FIGURES Figure 1a: Principal chemical reaction in the gypsum wallboard manufacturing process. Page 1b: The common and chemical names...

Lin, Kai Hsuan

2012-06-07

487

Pork tenderness estimation by taste panel, Warner–Bratzler shear force and on-line methods  

Microsoft Academic Search

The extent to which modification of Warner–Bratzler shear force (WBSF) determinations, relating to storage and preparation of the meat, aperture of the V-shaped cutting blade and shearing velocity, improve the relationship with sensory tenderness perception of pork was studied. Additionally four on-line methods: pH1, FOP1 (light scattering), PQM1 (conductivity) and DDLT (Double Density Light Transmission), were evaluated for their ability

M. J Van Oeckel; N Warnants; Ch. V Boucqué

1999-01-01

488

Large-scale network parameter configuration using an on-line simulation framework  

Microsoft Academic Search

As the Internet infrastructure grows to support a variety of services, its legacy protocols are being overloaded with new functions such as traffic engineering. Today, operators engineer such capabilities through clever, but manual parameter tuning. In this paper, we propose a back-end support tool for large-scale parameter configuration that is based on efficient parameter state space search techniques and on-line

Tao Ye; Hema T. Kaur; Shivkumar Kalyanaraman; Murat Yuksel

2008-01-01

489

On-line particle-swarm-optimization control for maglev transportation system via backstepping design procedure  

Microsoft Academic Search

This study focuses on the design of a backstepping particle-swarm-optimization control (BSPSOC) for the on-line levitated balancing and propulsive positioning of a magnetic-levitation (maglev) transportation system. The dynamic model of a maglev transportation system including levitated electromagnets and a propulsive linear induction motor (LIM) based on the concepts of mechanical geometry and motion dynamics is firstly constructed. In the proposed

Rong-Jong Wai; Kun-Lun Chuang

2008-01-01

490

Recognition of On-line Handwritten Mathematical Formulas in the E-Chalk System  

Microsoft Academic Search

In this article, we present a system for the recognition of on-line handwritten mathematical formulas which is used in the electronic chalkboard (E-chalk), a multimedia system for distance-teaching. We discuss the classification of sym- bols and the construction of the tree of spatial relationships among them. The classification is based on support vec- tor machines and the construction of formulas

Ernesto Tapia; Raúl Rojas

2003-01-01

491

Multi-parameter on-line coal bulk analysis. Quarterly report, March 16--June 15, 1997  

SciTech Connect

An on-line coal analyzer is being developed as a joint venture between the French company SODERN which specializes in the manufacturing of neutron generators and associated electronics and the John B. Long Company which specializes in coal sampling equipment. Progress this quarter is summarized under the following topical headings: Measurement layout; Detector temperature stabilization; Raw coal library; and Determination of Btu content from elemental concentrations.

Vourvopoulos, G.

1997-12-31

492

Analytic redundancy for on-line fault diagnosis in a nuclear reactor  

SciTech Connect

A computer-aided diagnostic technique has been applied to on-line signal validation in an operating nuclear reactor. To avoid installation of additional redundant sensors for the sole purpose of fault isolation, a real-time model of nuclear instrumentation and the thermal-hydraulic process in the primary coolant loop was developed and experimentally validated. The model provides analytically redundant information sufficient for isolation of failed sensors as well as for detection of abnormal plant operation and component malfunctioning.

Ray, A.; Desai, M.; Deyst, J.; Geiger, R.

1983-07-01

493

On-line fault diagnosis in a nuclear reactor by sequential testing  

SciTech Connect

A sequential test technique for on-line fault diagnosis of sensor signals has been developed and successfully demonstrated in an operating nuclear reactor. The methodology provides a systematic procedure for detection and isolation of sensor failures by taking into account consistencies among all available measurements of a given process variable. Fault diagnosis is accomplished on the basis of the cumulative information derived from the measurement history that includes the past and current observations.

Ray, A.; Deyst, J.; DeSai, M.

1983-06-01

494

Java for On-line Distributed Monitoring of Heterogeneous Systems and Services  

Microsoft Academic Search

The control and management of Web-based service quality require the extension of the Internet infrastructure with monitoring functions to ascertain dynamically the state of networked resources. We describe the design and implementation of the Monitoring Application Programming Interface (MAPI), a Java-based tool for the on-line monitoring of Internet heterogeneous resources, which provides monitoring indicators at different levels of abstraction. At

Paolo Bellavista; Antonio Corradi; Cesare Stefanelli

2002-01-01

495

A PM synchronous servo motor drive with an on-line trained fuzzy neural network controller  

Microsoft Academic Search

A permanent magnet (PM) synchronous servo motor drive with integral-proportional (IP) position controller and a proposed on-line trained fuzzy neural network (FNN) controller is introduced in this paper. First, an IP position controller is designed according to the estimated plant model to match the time-domain command tracking specifications. Then the resulting closed-loop tracking transfer function is used as the reference

Faa-Jeng Lin; Rong-Jong Wai; Hong-Pong Chen

1998-01-01

496

[Status and needs research for on-line monitoring of VOCs emissions from stationary sources].  

PubMed

Based on atmospheric volatile organic compounds (VOCs) pollution control requirements during the twelfth-five year plan and the current status of monitoring and management in the world, instrumental architecture and technical characteristics of continuous emission monitoring systems (CEMS) for VOCs emission from stationary sources are investigated and researched. Technological development needs of VOCs emission on-line monitoring techniques for stationary sources in China are proposed from the system sampling pretreatment technology and analytical measurement techniques. PMID:24640921

Wang, Qiang; Zhou, Gang; Zhong, Qi; Zhao, Jin-Bao; Yang, Kai

2013-12-01

497

Ion exchange micro columns for on-line preconcentration of heavy metals  

Microsoft Academic Search

An on-line break-through test for zinc, cadmium and lead has been carried out by means of a flow-through cell and computerized potentiometric stripping analysis. This test has been applied to seventeen ion-exchange materials and enabled within a short time a predecision about the suitability of a resin for a special preconcentration problem. For the determination of the three trace elements

O. Elsholz; G. Schulze

1995-01-01

498

Ion exchange micro columns for on-line preconcentration of heavy metals  

Microsoft Academic Search

An on-line break-through test for zinc, cadmium and lead has been carried out by means of a flow-through cell and computerized potentiometric stripping analysis. This test has been applied to seventeen ion-exchange materials and enabled within a short time a predecision about the suitability of a resin for a special precon-centration problem. For the determination of the three trace elements

O. Elsholz; G. Schulze

1995-01-01

499

A Blended On-line Engineering Technology Course Using Web Conferencing Technology  

NSDL National Science Digital Library

Today, universities must compete for students while searching for ways to be more cost effective. Many Universities that have long used the in-residence model for course delivery are now turning to the virtual classroom. On-line or distance learning methods make courses available to a potential student population that would not otherwise be accessible in a cost effective manner. The University of Dayton (UD) has traditionally been an in-residence institution, and many students go home for the summer and take courses from a college or University in their local area. By offering distance learning or on-line classes during the summer, the University of Dayton could attract some of those students to take UD courses. There has recently been some effort to make UD courses available to distant students. Courses in Engineering Technology are currently being offered to students physically located at Edison Community College in Piqua Ohio using videoconferencing technology. There are courses being offered on-line and as study at home by some departments through the University's summer distributed learning program. The Engineering Management Department is currently offering graduate courses using interactive Web Conferencing. However, there were no school of engineering undergraduate courses that were offered in a blended on-line mode. Over the last year, University of Dayton Information Technology (UDit), in cooperation with Engineering Technology and other academic departments, evaluated several Web Conferencing Technologies. This technology delivers courseware with live streaming video and interactive streaming audio web casts. In the summer of 2004, Engineering Technology faculty developed a course in Engineering Economy that took advantage of the Universitys new Web Conferencing system. This course was delivered in a blended learning mode using a combination of synchronous and asynchronous modes.

Edmonson, Charlie P.

500

Posterior Density Estimation for a Class of On-line Quality Control Models  

NASA Astrophysics Data System (ADS)

On-line quality control during production calls for a periodical monitoring of the produced items according to some prescribed strategy. It is reasonable to assume the existence of internal non-observable variables so that the carried out monitoring is only partially reliable. Under the setting of a Hidden Markov Model (HMM), posterior density estimates are obtained via particle filter type algorithms. Making use of kernel density methods the stable regime densities are approximated and false-alarm probabilities are estimated.

Dorea, Chang C. Y.; Santos, Walter B.

2011-11-01